Merge branch 'cubeb'

dep/cubeb/AUTHORS

@@ -0,0 +1,16 @@
+Matthew Gregan <kinetik@flim.org>
+Alexandre Ratchov <alex@caoua.org>
+Michael Wu <mwu@mozilla.com>
+Paul Adenot <paul@paul.cx>
+David Richards <drichards@mozilla.com>
+Sebastien Alaiwan <sebastien.alaiwan@gmail.com>
+KO Myung-Hun <komh@chollian.net>
+Haakon Sporsheim <haakon.sporsheim@telenordigital.com>
+Alex Chronopoulos <achronop@gmail.com>
+Jan Beich <jbeich@FreeBSD.org>
+Vito Caputo <vito.caputo@coreos.com>
+Landry Breuil <landry@openbsd.org>
+Jacek Caban <jacek@codeweavers.com>
+Paul Hancock <Paul.Hancock.17041993@live.com>
+Ted Mielczarek <ted@mielczarek.org>
+Chun-Min Chang <chun.m.chang@gmail.com>

dep/cubeb/CMakeLists.txt

@@ -0,0 +1,332 @@
+# TODO
+# - backend selection via command line, rather than simply detecting headers.
+
+cmake_minimum_required(VERSION 3.1 FATAL_ERROR)
+project(cubeb
+  VERSION 0.0.0)
+
+option(BUILD_SHARED_LIBS "Build shared libraries" OFF)
+option(BUILD_TESTS "Build tests" ON)
+option(BUILD_RUST_LIBS "Build rust backends" OFF)
+option(BUILD_TOOLS "Build tools" ON)
+
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
+      "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel." FORCE)
+endif()
+
+if(POLICY CMP0063)
+  cmake_policy(SET CMP0063 NEW)
+endif()
+set(CMAKE_C_STANDARD 99)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+if(NOT COMMAND add_sanitizers)
+  list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake/sanitizers-cmake/cmake")
+  find_package(Sanitizers)
+  if(NOT COMMAND add_sanitizers)
+    message(FATAL_ERROR "Could not find sanitizers-cmake: run\n\tgit submodule update --init --recursive\nin base git checkout")
+  endif()
+endif()
+
+if(BUILD_TESTS)
+  if(NOT TARGET gtest_main)
+    if(NOT EXISTS "${PROJECT_SOURCE_DIR}/googletest/CMakeLists.txt")
+      message(FATAL_ERROR "Could not find googletest: run\n\tgit submodule update --init --recursive\nin base git checkout")
+    endif()
+    add_definitions(-DGTEST_HAS_TR1_TUPLE=0)
+    set(gtest_force_shared_crt ON CACHE BOOL "")
+    add_subdirectory(googletest)
+  endif()
+endif()
+
+if (BUILD_RUST_LIBS)
+  if(EXISTS "${PROJECT_SOURCE_DIR}/src/cubeb-pulse-rs")
+    set(USE_PULSE_RUST 1)
+  endif()
+  if(EXISTS "${PROJECT_SOURCE_DIR}/src/cubeb-coreaudio-rs")
+    set(USE_AUDIOUNIT_RUST 1)
+  endif()
+endif()
+
+# On OS/2, visibility attribute is not supported.
+if(NOT OS2)
+  set(CMAKE_C_VISIBILITY_PRESET hidden)
+  set(CMAKE_CXX_VISIBILITY_PRESET hidden)
+  set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
+endif()
+
+set(CMAKE_CXX_WARNING_LEVEL 4)
+if(NOT MSVC)
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wno-unused-parameter")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-unused-parameter")
+endif()
+
+add_library(cubeb
+  src/cubeb.c
+  src/cubeb_mixer.cpp
+  src/cubeb_resampler.cpp
+  src/cubeb_log.cpp
+  src/cubeb_strings.c
+  src/cubeb_utils.cpp
+   $<TARGET_OBJECTS:speex>)
+target_include_directories(cubeb
+  PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include> $<INSTALL_INTERFACE:include>
+)
+target_include_directories(cubeb PRIVATE src)
+target_compile_definitions(cubeb PRIVATE OUTSIDE_SPEEX)
+target_compile_definitions(cubeb PRIVATE FLOATING_POINT)
+target_compile_definitions(cubeb PRIVATE EXPORT=)
+target_compile_definitions(cubeb PRIVATE RANDOM_PREFIX=speex)
+
+add_sanitizers(cubeb)
+
+include(GenerateExportHeader)
+generate_export_header(cubeb EXPORT_FILE_NAME ${CMAKE_BINARY_DIR}/exports/cubeb_export.h)
+target_include_directories(cubeb
+  PUBLIC $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/exports>
+)
+
+if(UNIX)
+  include(GNUInstallDirs)
+else()
+  set(CMAKE_INSTALL_LIBDIR "lib")
+  set(CMAKE_INSTALL_BINDIR "bin")
+  set(CMAKE_INSTALL_DATADIR "share")
+  set(CMAKE_INSTALL_DOCDIR "${CMAKE_INSTALL_DATADIR}/doc")
+  set(CMAKE_INSTALL_INCLUDEDIR "include")
+endif()
+
+install(DIRECTORY ${CMAKE_SOURCE_DIR}/include/${PROJECT_NAME} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+install(DIRECTORY ${CMAKE_BINARY_DIR}/exports/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME})
+
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file(
+  "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+  COMPATIBILITY SameMajorVersion
+)
+
+configure_package_config_file(
+  "Config.cmake.in"
+  "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+  INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+)
+
+install(TARGETS cubeb
+  EXPORT "${PROJECT_NAME}Targets"
+  DESTINATION ${CMAKE_INSTALL_PREFIX}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+)
+install(
+  FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake" "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+)
+install(
+  EXPORT "${PROJECT_NAME}Targets"
+  NAMESPACE "${PROJECT_NAME}::"
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+)
+
+add_library(speex OBJECT
+  src/speex/resample.c)
+set_target_properties(speex PROPERTIES POSITION_INDEPENDENT_CODE TRUE)
+target_compile_definitions(speex PRIVATE OUTSIDE_SPEEX)
+target_compile_definitions(speex PRIVATE FLOATING_POINT)
+target_compile_definitions(speex PRIVATE EXPORT=)
+target_compile_definitions(speex PRIVATE RANDOM_PREFIX=speex)
+
+include(CheckIncludeFiles)
+
+check_include_files(AudioUnit/AudioUnit.h USE_AUDIOUNIT)
+if(USE_AUDIOUNIT)
+  target_sources(cubeb PRIVATE
+    src/cubeb_audiounit.cpp
+    src/cubeb_osx_run_loop.cpp)
+  target_compile_definitions(cubeb PRIVATE USE_AUDIOUNIT)
+  target_link_libraries(cubeb PRIVATE "-framework AudioUnit" "-framework CoreAudio" "-framework CoreServices")
+endif()
+
+check_include_files(pulse/pulseaudio.h USE_PULSE)
+if(USE_PULSE)
+  target_sources(cubeb PRIVATE
+    src/cubeb_pulse.c)
+  target_compile_definitions(cubeb PRIVATE USE_PULSE)
+  target_link_libraries(cubeb PRIVATE pthread ${CMAKE_DL_LIBS})
+endif()
+
+check_include_files(alsa/asoundlib.h USE_ALSA)
+if(USE_ALSA)
+  target_sources(cubeb PRIVATE
+    src/cubeb_alsa.c)
+  target_compile_definitions(cubeb PRIVATE USE_ALSA)
+  target_link_libraries(cubeb PRIVATE pthread ${CMAKE_DL_LIBS})
+endif()
+
+check_include_files(jack/jack.h USE_JACK)
+if(USE_JACK)
+  target_sources(cubeb PRIVATE
+    src/cubeb_jack.cpp)
+  target_compile_definitions(cubeb PRIVATE USE_JACK)
+  target_link_libraries(cubeb PRIVATE pthread ${CMAKE_DL_LIBS})
+endif()
+
+check_include_files(audioclient.h USE_WASAPI)
+if(USE_WASAPI)
+  target_sources(cubeb PRIVATE
+    src/cubeb_wasapi.cpp)
+  target_compile_definitions(cubeb PRIVATE USE_WASAPI)
+  target_link_libraries(cubeb PRIVATE avrt ole32)
+endif()
+
+check_include_files("windows.h;mmsystem.h" USE_WINMM)
+if(USE_WINMM)
+  target_sources(cubeb PRIVATE
+    src/cubeb_winmm.c)
+  target_compile_definitions(cubeb PRIVATE USE_WINMM)
+  target_link_libraries(cubeb PRIVATE winmm)
+endif()
+
+check_include_files(SLES/OpenSLES.h USE_OPENSL)
+if(USE_OPENSL)
+  target_sources(cubeb PRIVATE
+    src/cubeb_opensl.c
+    src/cubeb-jni.cpp)
+  target_compile_definitions(cubeb PRIVATE USE_OPENSL)
+  target_link_libraries(cubeb PRIVATE OpenSLES)
+endif()
+
+check_include_files(android/log.h USE_AUDIOTRACK)
+if(USE_AUDIOTRACK)
+  target_sources(cubeb PRIVATE
+    src/cubeb_audiotrack.c)
+  target_compile_definitions(cubeb PRIVATE USE_AUDIOTRACK)
+  target_link_libraries(cubeb PRIVATE log)
+endif()
+
+check_include_files(sndio.h USE_SNDIO)
+if(USE_SNDIO)
+  target_sources(cubeb PRIVATE
+    src/cubeb_sndio.c)
+  target_compile_definitions(cubeb PRIVATE USE_SNDIO)
+  target_link_libraries(cubeb PRIVATE pthread ${CMAKE_DL_LIBS})
+endif()
+
+check_include_files(sys/audioio.h USE_SUN)
+if(USE_SUN)
+  target_sources(cubeb PRIVATE
+    src/cubeb_sun.c)
+  target_compile_definitions(cubeb PRIVATE USE_SUN)
+  target_link_libraries(cubeb PRIVATE pthread)
+endif()
+
+check_include_files(kai.h USE_KAI)
+if(USE_KAI)
+  target_sources(cubeb PRIVATE
+    src/cubeb_kai.c)
+  target_compile_definitions(cubeb PRIVATE USE_KAI)
+  target_link_libraries(cubeb PRIVATE kai)
+endif()
+
+if(USE_PULSE_RUST)
+  include(ExternalProject)
+  set_directory_properties(PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/rust)
+  ExternalProject_Add(
+    cubeb_pulse_rs
+    DOWNLOAD_COMMAND ""
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND cargo build COMMAND cargo build --release
+    BINARY_DIR "${CMAKE_SOURCE_DIR}/src/cubeb-pulse-rs"
+    INSTALL_COMMAND ""
+    LOG_BUILD ON)
+  add_dependencies(cubeb cubeb_pulse_rs)
+  target_compile_definitions(cubeb PRIVATE USE_PULSE_RUST)
+  target_link_libraries(cubeb PRIVATE
+    debug "${CMAKE_SOURCE_DIR}/src/cubeb-pulse-rs/target/debug/libcubeb_pulse.a"
+    optimized "${CMAKE_SOURCE_DIR}/src/cubeb-pulse-rs/target/release/libcubeb_pulse.a" pulse)
+endif()
+
+if(USE_AUDIOUNIT_RUST)
+  include(ExternalProject)
+  set_directory_properties(PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/rust)
+  ExternalProject_Add(
+    cubeb_coreaudio_rs
+    DOWNLOAD_COMMAND ""
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND cargo build COMMAND cargo build --release
+    BINARY_DIR "${CMAKE_SOURCE_DIR}/src/cubeb-coreaudio-rs"
+    INSTALL_COMMAND ""
+    LOG_BUILD ON)
+  add_dependencies(cubeb cubeb_coreaudio_rs)
+  target_compile_definitions(cubeb PRIVATE USE_AUDIOUNIT_RUST)
+  target_link_libraries(cubeb PRIVATE
+    debug "${CMAKE_SOURCE_DIR}/src/cubeb-coreaudio-rs/target/debug/libcubeb_coreaudio.a"
+    optimized "${CMAKE_SOURCE_DIR}/src/cubeb-coreaudio-rs/target/release/libcubeb_coreaudio.a")
+endif()
+
+find_package(Doxygen)
+if(DOXYGEN_FOUND)
+  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/docs/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/docs/Doxyfile @ONLY)
+  add_custom_target(doc ALL
+    ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/docs/Doxyfile
+    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/docs
+    COMMENT "Generating API documentation with Doxygen" VERBATIM)
+endif()
+
+if(BUILD_TESTS)
+  enable_testing()
+
+  macro(cubeb_add_test NAME)
+    add_executable(test_${NAME} test/test_${NAME}.cpp)
+    target_include_directories(test_${NAME} PRIVATE ${gtest_SOURCE_DIR}/include)
+    target_include_directories(test_${NAME} PRIVATE src)
+    target_link_libraries(test_${NAME} PRIVATE cubeb gtest_main)
+    add_test(${NAME} test_${NAME})
+    add_sanitizers(test_${NAME})
+    install(TARGETS test_${NAME} DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR})
+  endmacro(cubeb_add_test)
+
+  cubeb_add_test(sanity)
+  cubeb_add_test(tone)
+  cubeb_add_test(audio)
+  cubeb_add_test(record)
+  cubeb_add_test(devices)
+  cubeb_add_test(callback_ret)
+
+  add_executable(test_resampler test/test_resampler.cpp src/cubeb_resampler.cpp $<TARGET_OBJECTS:speex>)
+  target_include_directories(test_resampler PRIVATE ${gtest_SOURCE_DIR}/include)
+  target_include_directories(test_resampler PRIVATE src)
+  target_compile_definitions(test_resampler PRIVATE OUTSIDE_SPEEX)
+  target_compile_definitions(test_resampler PRIVATE FLOATING_POINT)
+  target_compile_definitions(test_resampler PRIVATE EXPORT=)
+  target_compile_definitions(test_resampler PRIVATE RANDOM_PREFIX=speex)
+  target_link_libraries(test_resampler PRIVATE cubeb gtest_main)
+  add_test(resampler test_resampler)
+  add_sanitizers(test_resampler)
+  install(TARGETS test_resampler DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR})
+
+  cubeb_add_test(duplex)
+
+  if (USE_WASAPI)
+    cubeb_add_test(overload_callback)
+    cubeb_add_test(loopback)
+  endif()
+
+  cubeb_add_test(latency test_latency)
+  cubeb_add_test(ring_array)
+
+  cubeb_add_test(utils)
+  cubeb_add_test(ring_buffer)
+  cubeb_add_test(device_changed_callback)
+endif()
+
+if(BUILD_TOOLS)
+  add_executable(cubeb-test tools/cubeb-test.cpp)
+  target_include_directories(cubeb-test PRIVATE src)
+  target_link_libraries(cubeb-test PRIVATE cubeb)
+  add_sanitizers(cubeb-test)
+  install(TARGETS cubeb-test DESTINATION ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR})
+endif()

dep/cubeb/Config.cmake.in

@@ -0,0 +1,4 @@
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/cubebTargets.cmake")
+check_required_components(cubeb)

dep/cubeb/INSTALL.md

@@ -0,0 +1,46 @@
+# Build instructions for libcubeb
+
+You must have CMake v3.1 or later installed.
+
+1. `git clone --recursive https://github.com/kinetiknz/cubeb.git`
+2. `mkdir cubeb-build`
+3. `cd cubeb-build`
+3. `cmake ../cubeb`
+4. `cmake --build .`
+5. `ctest`
+
+# Windows build notes
+
+Windows builds can use Microsoft Visual Studio 2015, Microsoft Visual Studio
+2017, or MinGW-w64 with Win32 threads (by passing `cmake -G` to generate the
+appropriate build configuration).
+
+## Microsoft Visual Studio 2015 or 2017 Command Line
+
+CMake can be used from the command line by following the build steps at the top
+of this file. CMake will select a default generator based on the environment,
+or one can be specified with the `-G` argument.
+
+## Microsoft Visual Studio 2017 IDE
+
+Visual Studio 2017 adds in built support for CMake. CMake can be used from
+within the IDE via the following steps:
+
+- Navigate to `File -> Open -> Cmake...`
+- Open `CMakeLists.txt` file in the root of the project.
+
+Note, to generate the build in the cubeb dir CMake settings need to be updated
+via: `CMake -> Change CMake Settings -> CMakeLists.txt`. The default
+configuration used by Visual Studio will place the build in a different location
+than the steps detailed at the top of this file.
+
+## MinGW-w64
+
+To build with MinGW-w64, install the following items:
+
+- Download and install MinGW-w64 with Win32 threads.
+- Download and install CMake.
+- Run MinGW-w64 Terminal from the Start Menu.
+- Follow the build steps at the top of this file, but at step 3 run:
+  `cmake -G "MinGW Makefiles" ..`
+- Continue the build steps at the top of this file.

dep/cubeb/LICENSE

@@ -0,0 +1,13 @@
+Copyright © 2011 Mozilla Foundation
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

dep/cubeb/README.md

@@ -0,0 +1,6 @@
+[![Build Status](https://travis-ci.org/kinetiknz/cubeb.svg?branch=master)](https://travis-ci.org/kinetiknz/cubeb)
+[![Build status](https://ci.appveyor.com/api/projects/status/osv2r0m1j1nt9csr/branch/master?svg=true)](https://ci.appveyor.com/project/kinetiknz/cubeb/branch/master)
+
+See INSTALL.md for build instructions.
+
+Licensed under an ISC-style license.  See LICENSE for details.

dep/cubeb/TODO

@@ -0,0 +1,41 @@
+TODO:
+- directsound: incomplete and somewhat broken
+- osx: understand why AudioQueueGetCurrentTime can return negative mSampleTime
+- test (and fix) sub-prefill size data playback
+- report stream delay instead of position; leave position calculation to user
+- capture support
+- capture and output enumeration and configuration
+  - also expose default hardware config to allow decisions on speaker layout
+- prefill occurs at different times in each backend:
+  - pulse prefills async off worker thread after init
+  - coreaudio prefills during init
+  - alsa prefills async after start
+- expose configured prefill size; may differ from requested latency
+  - solved by exposing stream delay
+- xruns may occur in user callback but also in audio hardware
+  may need to expose details of hardware xruns to user api
+- document thread safety
+- document which calls may block, and when effects take effect
+- document what's permissible inside callbacks
+- implement basic channel mapping for surround
+  - vorbis has documented mapping based on channel count (if mapping type ==
+    0) -- http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9
+    1 -> M
+    2 -> L, R
+    3 -> L, C, R
+    4 -> L, R, RL, RR
+    5 -> L, C, R, RL, RR
+    6 -> L, C, R, RL, RR, LFE
+    7 -> L, C, R, SL, SR, RC, LFE
+    8 -> L, C, R, SL, SR, RL, RR, LFE
+   >8 -> application defined
+  - wave files with channel count only
+    3 -> L, R, C
+    4 -> L, R, RL, RR
+    5 -> L, R, C, RL, RR
+    6 -> L, R, C, LFE, RL, RR
+    7 -> L, R, C, LFE, RC, SL, SR
+    8 -> L, R, C, LFE, RL, RR, SL, SR
+  - wave files with WAVE_FORMAT_EXTENSIBLE have explicitly mappings, can
+    extract these
+- implement configurable channel mapping

dep/cubeb/cubeb.supp

@@ -0,0 +1,36 @@
+{
+  snd_config_update-malloc
+  Memcheck:Leak
+  fun:malloc
+  ...
+  fun:snd_config_update_r
+}
+{
+  snd1_dlobj_cache_get-malloc
+  Memcheck:Leak
+  fun:malloc
+  ...
+  fun:snd1_dlobj_cache_get
+}
+{
+  parse_defs-malloc
+  Memcheck:Leak
+  fun:malloc
+  ...
+  fun:parse_defs
+}
+{
+  parse_defs-calloc
+  Memcheck:Leak
+  fun:calloc
+  ...
+  fun:parse_defs
+}
+{
+  pa_client_conf_from_x11-malloc
+  Memcheck:Leak
+  fun:malloc
+  ...
+  fun:pa_client_conf_from_x11
+}
+

dep/cubeb/cubeb.vcxproj

@@ -0,0 +1,406 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="DebugFast|Win32">
+      <Configuration>DebugFast</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="DebugFast|x64">
+      <Configuration>DebugFast</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseLTCG|Win32">
+      <Configuration>ReleaseLTCG</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="ReleaseLTCG|x64">
+      <Configuration>ReleaseLTCG</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="include\cubeb\cubeb.h" />
+    <ClInclude Include="include\cubeb\cubeb_export.h" />
+    <ClInclude Include="src\cubeb-internal.h" />
+    <ClInclude Include="src\cubeb-speex-resampler.h" />
+    <ClInclude Include="src\cubeb_array_queue.h" />
+    <ClInclude Include="src\cubeb_assert.h" />
+    <ClInclude Include="src\cubeb_log.h" />
+    <ClInclude Include="src\cubeb_mixer.h" />
+    <ClInclude Include="src\cubeb_resampler.h" />
+    <ClInclude Include="src\cubeb_resampler_internal.h" />
+    <ClInclude Include="src\cubeb_ringbuffer.h" />
+    <ClInclude Include="src\cubeb_ring_array.h" />
+    <ClInclude Include="src\cubeb_strings.h" />
+    <ClInclude Include="src\cubeb_utils.h" />
+    <ClInclude Include="src\cubeb_utils_win.h" />
+    <ClInclude Include="src\speex\arch.h" />
+    <ClInclude Include="src\speex\fixed_generic.h" />
+    <ClInclude Include="src\speex\resample_neon.h" />
+    <ClInclude Include="src\speex\resample_sse.h" />
+    <ClInclude Include="src\speex\speex_config_types.h" />
+    <ClInclude Include="src\speex\speex_resampler.h" />
+    <ClInclude Include="src\speex\stack_alloc.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="src\cubeb.c" />
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dep/cubeb/cubeb.vcxproj.filters

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClInclude Include="include\cubeb\cubeb.h" />
+    <ClInclude Include="src\speex\fixed_generic.h">
+      <Filter>speex</Filter>
+    </ClInclude>
+    <ClInclude Include="src\speex\resample_neon.h">
+      <Filter>speex</Filter>
+    </ClInclude>
+    <ClInclude Include="src\speex\resample_sse.h">
+      <Filter>speex</Filter>
+    </ClInclude>
+    <ClInclude Include="src\speex\speex_config_types.h">
+      <Filter>speex</Filter>
+    </ClInclude>
+    <ClInclude Include="src\speex\speex_resampler.h">
+      <Filter>speex</Filter>
+    </ClInclude>
+    <ClInclude Include="src\speex\stack_alloc.h">
+      <Filter>speex</Filter>
+    </ClInclude>
+    <ClInclude Include="src\speex\arch.h">
+      <Filter>speex</Filter>
+    </ClInclude>
+    <ClInclude Include="include\cubeb\cubeb_export.h" />
+    <ClInclude Include="src\cubeb-internal.h" />
+    <ClInclude Include="src\cubeb-speex-resampler.h" />
+    <ClInclude Include="src\cubeb_array_queue.h" />
+    <ClInclude Include="src\cubeb_assert.h" />
+    <ClInclude Include="src\cubeb_log.h" />
+    <ClInclude Include="src\cubeb_mixer.h" />
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+    <ClInclude Include="src\cubeb_resampler_internal.h" />
+    <ClInclude Include="src\cubeb_ring_array.h" />
+    <ClInclude Include="src\cubeb_ringbuffer.h" />
+    <ClInclude Include="src\cubeb_strings.h" />
+    <ClInclude Include="src\cubeb_utils.h" />
+    <ClInclude Include="src\cubeb_utils_win.h" />
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+      <UniqueIdentifier>{a22ed8dc-2384-4a96-bd3b-2370d6d7cd62}</UniqueIdentifier>
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+      <Filter>speex</Filter>
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dep/cubeb/include/cubeb/cubeb.h

@@ -0,0 +1,658 @@
+/*
+ * Copyright © 2011 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#if !defined(CUBEB_c2f983e9_c96f_e71c_72c3_bbf62992a382)
+#define CUBEB_c2f983e9_c96f_e71c_72c3_bbf62992a382
+
+#include <stdint.h>
+#include <stdlib.h>
+#include "cubeb_export.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/** @mainpage
+
+    @section intro Introduction
+
+    This is the documentation for the <tt>libcubeb</tt> C API.
+    <tt>libcubeb</tt> is a callback-based audio API library allowing the
+    authoring of portable multiplatform audio playback and recording.
+
+    @section example Example code
+
+    This example shows how to create a duplex stream that pipes the microphone
+    to the speakers, with minimal latency and the proper sample-rate for the
+    platform.
+
+    @code
+    cubeb * app_ctx;
+    cubeb_init(&app_ctx, "Example Application", NULL);
+    int rv;
+    uint32_t rate;
+    uint32_t latency_frames;
+    uint64_t ts;
+
+    rv = cubeb_get_preferred_sample_rate(app_ctx, &rate);
+    if (rv != CUBEB_OK) {
+      fprintf(stderr, "Could not get preferred sample-rate");
+      return rv;
+    }
+
+    cubeb_stream_params output_params;
+    output_params.format = CUBEB_SAMPLE_FLOAT32NE;
+    output_params.rate = rate;
+    output_params.channels = 2;
+    output_params.layout = CUBEB_LAYOUT_UNDEFINED;
+    output_params.prefs = CUBEB_STREAM_PREF_NONE;
+
+    rv = cubeb_get_min_latency(app_ctx, &output_params, &latency_frames);
+    if (rv != CUBEB_OK) {
+      fprintf(stderr, "Could not get minimum latency");
+      return rv;
+    }
+
+    cubeb_stream_params input_params;
+    input_params.format = CUBEB_SAMPLE_FLOAT32NE;
+    input_params.rate = rate;
+    input_params.channels = 1;
+    input_params.layout = CUBEB_LAYOUT_UNDEFINED;
+    input_params.prefs = CUBEB_STREAM_PREF_NONE;
+
+    cubeb_stream * stm;
+    rv = cubeb_stream_init(app_ctx, &stm, "Example Stream 1",
+                           NULL, &input_params,
+                           NULL, &output_params,
+                           latency_frames,
+                           data_cb, state_cb,
+                           NULL);
+    if (rv != CUBEB_OK) {
+      fprintf(stderr, "Could not open the stream");
+      return rv;
+    }
+
+    rv = cubeb_stream_start(stm);
+    if (rv != CUBEB_OK) {
+      fprintf(stderr, "Could not start the stream");
+      return rv;
+    }
+    for (;;) {
+      cubeb_stream_get_position(stm, &ts);
+      printf("time=%llu\n", ts);
+      sleep(1);
+    }
+    rv = cubeb_stream_stop(stm);
+    if (rv != CUBEB_OK) {
+      fprintf(stderr, "Could not stop the stream");
+      return rv;
+    }
+
+    cubeb_stream_destroy(stm);
+    cubeb_destroy(app_ctx);
+    @endcode
+
+    @code
+    long data_cb(cubeb_stream * stm, void * user,
+                 const void * input_buffer, void * output_buffer, long nframes)
+    {
+      const float * in  = input_buffer;
+      float * out = output_buffer;
+
+      for (int i = 0; i < nframes; ++i) {
+        for (int c = 0; c < 2; ++c) {
+          out[2 * i + c] = in[i];
+        }
+      }
+      return nframes;
+    }
+    @endcode
+
+    @code
+    void state_cb(cubeb_stream * stm, void * user, cubeb_state state)
+    {
+      printf("state=%d\n", state);
+    }
+    @endcode
+*/
+
+/** @file
+    The <tt>libcubeb</tt> C API. */
+
+typedef struct cubeb cubeb;               /**< Opaque handle referencing the application state. */
+typedef struct cubeb_stream cubeb_stream; /**< Opaque handle referencing the stream state. */
+
+/** Sample format enumeration. */
+typedef enum {
+  /**< Little endian 16-bit signed PCM. */
+  CUBEB_SAMPLE_S16LE,
+  /**< Big endian 16-bit signed PCM. */
+  CUBEB_SAMPLE_S16BE,
+  /**< Little endian 32-bit IEEE floating point PCM. */
+  CUBEB_SAMPLE_FLOAT32LE,
+  /**< Big endian 32-bit IEEE floating point PCM. */
+  CUBEB_SAMPLE_FLOAT32BE,
+#if defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__)
+  /**< Native endian 16-bit signed PCM. */
+  CUBEB_SAMPLE_S16NE = CUBEB_SAMPLE_S16BE,
+  /**< Native endian 32-bit IEEE floating point PCM. */
+  CUBEB_SAMPLE_FLOAT32NE = CUBEB_SAMPLE_FLOAT32BE
+#else
+  /**< Native endian 16-bit signed PCM. */
+  CUBEB_SAMPLE_S16NE = CUBEB_SAMPLE_S16LE,
+  /**< Native endian 32-bit IEEE floating point PCM. */
+  CUBEB_SAMPLE_FLOAT32NE = CUBEB_SAMPLE_FLOAT32LE
+#endif
+} cubeb_sample_format;
+
+/** An opaque handle used to refer a particular input or output device
+ *  across calls. */
+typedef void const * cubeb_devid;
+
+/** Level (verbosity) of logging for a particular cubeb context. */
+typedef enum {
+  CUBEB_LOG_DISABLED = 0, /** < Logging disabled */
+  CUBEB_LOG_NORMAL = 1, /**< Logging lifetime operation (creation/destruction). */
+  CUBEB_LOG_VERBOSE = 2, /**< Verbose logging of callbacks, can have performance implications. */
+} cubeb_log_level;
+
+typedef enum {
+  CHANNEL_UNKNOWN = 0,
+  CHANNEL_FRONT_LEFT = 1 << 0,
+  CHANNEL_FRONT_RIGHT = 1 << 1,
+  CHANNEL_FRONT_CENTER = 1 << 2,
+  CHANNEL_LOW_FREQUENCY = 1 << 3,
+  CHANNEL_BACK_LEFT = 1 << 4,
+  CHANNEL_BACK_RIGHT = 1 << 5,
+  CHANNEL_FRONT_LEFT_OF_CENTER = 1 << 6,
+  CHANNEL_FRONT_RIGHT_OF_CENTER = 1 << 7,
+  CHANNEL_BACK_CENTER = 1 << 8,
+  CHANNEL_SIDE_LEFT = 1 << 9,
+  CHANNEL_SIDE_RIGHT = 1 << 10,
+  CHANNEL_TOP_CENTER = 1 << 11,
+  CHANNEL_TOP_FRONT_LEFT = 1 << 12,
+  CHANNEL_TOP_FRONT_CENTER = 1 << 13,
+  CHANNEL_TOP_FRONT_RIGHT = 1 << 14,
+  CHANNEL_TOP_BACK_LEFT = 1 << 15,
+  CHANNEL_TOP_BACK_CENTER = 1 << 16,
+  CHANNEL_TOP_BACK_RIGHT = 1 << 17
+} cubeb_channel;
+
+typedef uint32_t cubeb_channel_layout;
+// Some common layout definitions.
+enum {
+  CUBEB_LAYOUT_UNDEFINED = 0, // Indicate the speaker's layout is undefined.
+  CUBEB_LAYOUT_MONO = CHANNEL_FRONT_CENTER,
+  CUBEB_LAYOUT_MONO_LFE = CUBEB_LAYOUT_MONO | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_STEREO = CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT,
+  CUBEB_LAYOUT_STEREO_LFE = CUBEB_LAYOUT_STEREO | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_3F =
+    CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT | CHANNEL_FRONT_CENTER,
+  CUBEB_LAYOUT_3F_LFE = CUBEB_LAYOUT_3F | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_2F1 =
+    CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT | CHANNEL_BACK_CENTER,
+  CUBEB_LAYOUT_2F1_LFE = CUBEB_LAYOUT_2F1 | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_3F1 = CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
+                     CHANNEL_FRONT_CENTER | CHANNEL_BACK_CENTER,
+  CUBEB_LAYOUT_3F1_LFE = CUBEB_LAYOUT_3F1 | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_2F2 = CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
+                     CHANNEL_SIDE_LEFT | CHANNEL_SIDE_RIGHT,
+  CUBEB_LAYOUT_2F2_LFE = CUBEB_LAYOUT_2F2 | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_QUAD = CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
+                      CHANNEL_BACK_LEFT | CHANNEL_BACK_RIGHT,
+  CUBEB_LAYOUT_QUAD_LFE = CUBEB_LAYOUT_QUAD | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_3F2 = CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
+                     CHANNEL_FRONT_CENTER | CHANNEL_SIDE_LEFT |
+                     CHANNEL_SIDE_RIGHT,
+  CUBEB_LAYOUT_3F2_LFE = CUBEB_LAYOUT_3F2 | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_3F2_BACK = CUBEB_LAYOUT_QUAD | CHANNEL_FRONT_CENTER,
+  CUBEB_LAYOUT_3F2_LFE_BACK = CUBEB_LAYOUT_3F2_BACK | CHANNEL_LOW_FREQUENCY,
+  CUBEB_LAYOUT_3F3R_LFE = CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
+                          CHANNEL_FRONT_CENTER | CHANNEL_LOW_FREQUENCY |
+                          CHANNEL_BACK_CENTER | CHANNEL_SIDE_LEFT |
+                          CHANNEL_SIDE_RIGHT,
+  CUBEB_LAYOUT_3F4_LFE = CHANNEL_FRONT_LEFT | CHANNEL_FRONT_RIGHT |
+                         CHANNEL_FRONT_CENTER | CHANNEL_LOW_FREQUENCY |
+                         CHANNEL_BACK_LEFT | CHANNEL_BACK_RIGHT |
+                         CHANNEL_SIDE_LEFT | CHANNEL_SIDE_RIGHT,
+};
+
+/** Miscellaneous stream preferences. */
+typedef enum {
+  CUBEB_STREAM_PREF_NONE     = 0x00, /**< No stream preferences are requested. */
+  CUBEB_STREAM_PREF_LOOPBACK = 0x01, /**< Request a loopback stream. Should be
+                                         specified on the input params and an
+                                         output device to loopback from should
+                                         be passed in place of an input device. */
+  CUBEB_STREAM_PREF_DISABLE_DEVICE_SWITCHING = 0x02, /**< Disable switching
+                                                          default device on OS
+                                                          changes. */
+  CUBEB_STREAM_PREF_VOICE = 0x04  /**< This stream is going to transport voice data.
+                                       Depending on the backend and platform, this can
+                                       change the audio input or output devices
+                                       selected, as well as the quality of the stream,
+                                       for example to accomodate bluetooth SCO modes on
+                                       bluetooth devices. */
+} cubeb_stream_prefs;
+
+/** Stream format initialization parameters. */
+typedef struct {
+  cubeb_sample_format format;   /**< Requested sample format.  One of
+                                     #cubeb_sample_format. */
+  uint32_t rate;                /**< Requested sample rate.  Valid range is [1000, 192000]. */
+  uint32_t channels;            /**< Requested channel count.  Valid range is [1, 8]. */
+  cubeb_channel_layout layout;  /**< Requested channel layout. This must be consistent with the provided channels. CUBEB_LAYOUT_UNDEFINED if unknown */
+  cubeb_stream_prefs prefs;     /**< Requested preferences. */
+} cubeb_stream_params;
+
+/** Audio device description */
+typedef struct {
+  char * output_name; /**< The name of the output device */
+  char * input_name; /**< The name of the input device */
+} cubeb_device;
+
+/** Stream states signaled via state_callback. */
+typedef enum {
+  CUBEB_STATE_STARTED, /**< Stream started. */
+  CUBEB_STATE_STOPPED, /**< Stream stopped. */
+  CUBEB_STATE_DRAINED, /**< Stream drained. */
+  CUBEB_STATE_ERROR    /**< Stream disabled due to error. */
+} cubeb_state;
+
+/** Result code enumeration. */
+enum {
+  CUBEB_OK = 0,                       /**< Success. */
+  CUBEB_ERROR = -1,                   /**< Unclassified error. */
+  CUBEB_ERROR_INVALID_FORMAT = -2,    /**< Unsupported #cubeb_stream_params requested. */
+  CUBEB_ERROR_INVALID_PARAMETER = -3, /**< Invalid parameter specified. */
+  CUBEB_ERROR_NOT_SUPPORTED = -4,     /**< Optional function not implemented in current backend. */
+  CUBEB_ERROR_DEVICE_UNAVAILABLE = -5 /**< Device specified by #cubeb_devid not available. */
+};
+
+/**
+ * Whether a particular device is an input device (e.g. a microphone), or an
+ * output device (e.g. headphones). */
+typedef enum {
+  CUBEB_DEVICE_TYPE_UNKNOWN,
+  CUBEB_DEVICE_TYPE_INPUT,
+  CUBEB_DEVICE_TYPE_OUTPUT
+} cubeb_device_type;
+
+/**
+ * The state of a device.
+ */
+typedef enum {
+  CUBEB_DEVICE_STATE_DISABLED, /**< The device has been disabled at the system level. */
+  CUBEB_DEVICE_STATE_UNPLUGGED, /**< The device is enabled, but nothing is plugged into it. */
+  CUBEB_DEVICE_STATE_ENABLED /**< The device is enabled. */
+} cubeb_device_state;
+
+/**
+ * Architecture specific sample type.
+ */
+typedef enum {
+  CUBEB_DEVICE_FMT_S16LE          = 0x0010, /**< 16-bit integers, Little Endian. */
+  CUBEB_DEVICE_FMT_S16BE          = 0x0020, /**< 16-bit integers, Big Endian. */
+  CUBEB_DEVICE_FMT_F32LE          = 0x1000, /**< 32-bit floating point, Little Endian. */
+  CUBEB_DEVICE_FMT_F32BE          = 0x2000  /**< 32-bit floating point, Big Endian. */
+} cubeb_device_fmt;
+
+#if defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__)
+/** 16-bit integers, native endianess, when on a Big Endian environment. */
+#define CUBEB_DEVICE_FMT_S16NE     CUBEB_DEVICE_FMT_S16BE
+/** 32-bit floating points, native endianess, when on a Big Endian environment. */
+#define CUBEB_DEVICE_FMT_F32NE     CUBEB_DEVICE_FMT_F32BE
+#else
+/** 16-bit integers, native endianess, when on a Little Endian environment. */
+#define CUBEB_DEVICE_FMT_S16NE     CUBEB_DEVICE_FMT_S16LE
+/** 32-bit floating points, native endianess, when on a Little Endian
+ *  environment. */
+#define CUBEB_DEVICE_FMT_F32NE     CUBEB_DEVICE_FMT_F32LE
+#endif
+/** All the 16-bit integers types. */
+#define CUBEB_DEVICE_FMT_S16_MASK  (CUBEB_DEVICE_FMT_S16LE | CUBEB_DEVICE_FMT_S16BE)
+/** All the 32-bit floating points types. */
+#define CUBEB_DEVICE_FMT_F32_MASK  (CUBEB_DEVICE_FMT_F32LE | CUBEB_DEVICE_FMT_F32BE)
+/** All the device formats types. */
+#define CUBEB_DEVICE_FMT_ALL       (CUBEB_DEVICE_FMT_S16_MASK | CUBEB_DEVICE_FMT_F32_MASK)
+
+/** Channel type for a `cubeb_stream`. Depending on the backend and platform
+ * used, this can control inter-stream interruption, ducking, and volume
+ * control.
+ */
+typedef enum {
+  CUBEB_DEVICE_PREF_NONE          = 0x00,
+  CUBEB_DEVICE_PREF_MULTIMEDIA    = 0x01,
+  CUBEB_DEVICE_PREF_VOICE         = 0x02,
+  CUBEB_DEVICE_PREF_NOTIFICATION  = 0x04,
+  CUBEB_DEVICE_PREF_ALL           = 0x0F
+} cubeb_device_pref;
+
+/** This structure holds the characteristics
+ *  of an input or output audio device. It is obtained using
+ *  `cubeb_enumerate_devices`, which returns these structures via
+ *  `cubeb_device_collection` and must be destroyed via
+ *  `cubeb_device_collection_destroy`. */
+typedef struct {
+  cubeb_devid devid;          /**< Device identifier handle. */
+  char const * device_id;     /**< Device identifier which might be presented in a UI. */
+  char const * friendly_name; /**< Friendly device name which might be presented in a UI. */
+  char const * group_id;      /**< Two devices have the same group identifier if they belong to the same physical device; for example a headset and microphone. */
+  char const * vendor_name;   /**< Optional vendor name, may be NULL. */
+
+  cubeb_device_type type;     /**< Type of device (Input/Output). */
+  cubeb_device_state state;   /**< State of device disabled/enabled/unplugged. */
+  cubeb_device_pref preferred;/**< Preferred device. */
+
+  cubeb_device_fmt format;    /**< Sample format supported. */
+  cubeb_device_fmt default_format; /**< The default sample format for this device. */
+  uint32_t max_channels;      /**< Channels. */
+  uint32_t default_rate;      /**< Default/Preferred sample rate. */
+  uint32_t max_rate;          /**< Maximum sample rate supported. */
+  uint32_t min_rate;          /**< Minimum sample rate supported. */
+
+  uint32_t latency_lo;        /**< Lowest possible latency in frames. */
+  uint32_t latency_hi;        /**< Higest possible latency in frames. */
+} cubeb_device_info;
+
+/** Device collection.
+ *  Returned by `cubeb_enumerate_devices` and destroyed by
+ *  `cubeb_device_collection_destroy`. */
+typedef struct {
+  cubeb_device_info * device; /**< Array of pointers to device info. */
+  size_t count;               /**< Device count in collection. */
+} cubeb_device_collection;
+
+/** User supplied data callback.
+    - Calling other cubeb functions from this callback is unsafe.
+    - The code in the callback should be non-blocking.
+    - Returning less than the number of frames this callback asks for or
+      provides puts the stream in drain mode. This callback will not be called
+      again, and the state callback will be called with CUBEB_STATE_DRAINED when
+      all the frames have been output.
+    @param stream The stream for which this callback fired.
+    @param user_ptr The pointer passed to cubeb_stream_init.
+    @param input_buffer A pointer containing the input data, or nullptr
+                        if this is an output-only stream.
+    @param output_buffer A pointer to a buffer to be filled with audio samples,
+                         or nullptr if this is an input-only stream.
+    @param nframes The number of frames of the two buffer.
+    @retval If the stream has output, this is the number of frames written to
+            the output buffer. In this case, if this number is less than
+            nframes then the stream will start to drain. If the stream is
+            input only, then returning nframes indicates data has been read.
+            In this case, a value less than nframes will result in the stream
+            being stopped.
+    @retval CUBEB_ERROR on error, in which case the data callback will stop
+            and the stream will enter a shutdown state. */
+typedef long (* cubeb_data_callback)(cubeb_stream * stream,
+                                     void * user_ptr,
+                                     void const * input_buffer,
+                                     void * output_buffer,
+                                     long nframes);
+
+/** User supplied state callback.
+    @param stream The stream for this this callback fired.
+    @param user_ptr The pointer passed to cubeb_stream_init.
+    @param state The new state of the stream. */
+typedef void (* cubeb_state_callback)(cubeb_stream * stream,
+                                      void * user_ptr,
+                                      cubeb_state state);
+
+/**
+ * User supplied callback called when the underlying device changed.
+ * @param user The pointer passed to cubeb_stream_init. */
+typedef void (* cubeb_device_changed_callback)(void * user_ptr);
+
+/**
+ * User supplied callback called when the underlying device collection changed.
+ * @param context A pointer to the cubeb context.
+ * @param user_ptr The pointer passed to cubeb_register_device_collection_changed. */
+typedef void (* cubeb_device_collection_changed_callback)(cubeb * context,
+                                                          void * user_ptr);
+
+/** User supplied callback called when a message needs logging. */
+typedef void (* cubeb_log_callback)(char const * fmt, ...);
+
+/** Initialize an application context.  This will perform any library or
+    application scoped initialization.
+
+    Note: On Windows platforms, COM must be initialized in MTA mode on
+    any thread that will call the cubeb API.
+
+    @param context A out param where an opaque pointer to the application
+                   context will be returned.
+    @param context_name A name for the context. Depending on the platform this
+                        can appear in different locations.
+    @param backend_name The name of the cubeb backend user desires to select.
+                        Accepted values self-documented in cubeb.c: init_oneshot
+                        If NULL, a default ordering is used for backend choice.
+                        A valid choice overrides all other possible backends,
+                        so long as the backend was included at compile time.
+    @retval CUBEB_OK in case of success.
+    @retval CUBEB_ERROR in case of error, for example because the host
+                        has no audio hardware. */
+CUBEB_EXPORT int cubeb_init(cubeb ** context, char const * context_name,
+                                              char const * backend_name);
+
+/** Get a read-only string identifying this context's current backend.
+    @param context A pointer to the cubeb context.
+    @retval Read-only string identifying current backend. */
+CUBEB_EXPORT char const * cubeb_get_backend_id(cubeb * context);
+
+/** Get the maximum possible number of channels.
+    @param context A pointer to the cubeb context.
+    @param max_channels The maximum number of channels.
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_INVALID_PARAMETER
+    @retval CUBEB_ERROR_NOT_SUPPORTED
+    @retval CUBEB_ERROR */
+CUBEB_EXPORT int cubeb_get_max_channel_count(cubeb * context, uint32_t * max_channels);
+
+/** Get the minimal latency value, in frames, that is guaranteed to work
+    when creating a stream for the specified sample rate. This is platform,
+    hardware and backend dependent.
+    @param context A pointer to the cubeb context.
+    @param params On some backends, the minimum achievable latency depends on
+                  the characteristics of the stream.
+    @param latency_frames The latency value, in frames, to pass to
+                          cubeb_stream_init.
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_INVALID_PARAMETER
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_get_min_latency(cubeb * context,
+                                       cubeb_stream_params * params,
+                                       uint32_t * latency_frames);
+
+/** Get the preferred sample rate for this backend: this is hardware and
+    platform dependent, and can avoid resampling, and/or trigger fastpaths.
+    @param context A pointer to the cubeb context.
+    @param rate The samplerate (in Hz) the current configuration prefers.
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_INVALID_PARAMETER
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_get_preferred_sample_rate(cubeb * context, uint32_t * rate);
+
+/** Destroy an application context. This must be called after all stream have
+ *  been destroyed.
+    @param context A pointer to the cubeb context.*/
+CUBEB_EXPORT void cubeb_destroy(cubeb * context);
+
+/** Initialize a stream associated with the supplied application context.
+    @param context A pointer to the cubeb context.
+    @param stream An out parameter to be filled with the an opaque pointer to a
+                  cubeb stream.
+    @param stream_name A name for this stream.
+    @param input_device Device for the input side of the stream. If NULL the
+                        default input device is used.
+    @param input_stream_params Parameters for the input side of the stream, or
+                               NULL if this stream is output only.
+    @param output_device Device for the output side of the stream. If NULL the
+                         default output device is used.
+    @param output_stream_params Parameters for the output side of the stream, or
+                                NULL if this stream is input only.
+    @param latency_frames Stream latency in frames.  Valid range
+                          is [1, 96000].
+    @param data_callback Will be called to preroll data before playback is
+                         started by cubeb_stream_start.
+    @param state_callback A pointer to a state callback.
+    @param user_ptr A pointer that will be passed to the callbacks. This pointer
+                    must outlive the life time of the stream.
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR
+    @retval CUBEB_ERROR_INVALID_FORMAT
+    @retval CUBEB_ERROR_DEVICE_UNAVAILABLE */
+CUBEB_EXPORT int cubeb_stream_init(cubeb * context,
+                                   cubeb_stream ** stream,
+                                   char const * stream_name,
+                                   cubeb_devid input_device,
+                                   cubeb_stream_params * input_stream_params,
+                                   cubeb_devid output_device,
+                                   cubeb_stream_params * output_stream_params,
+                                   uint32_t latency_frames,
+                                   cubeb_data_callback data_callback,
+                                   cubeb_state_callback state_callback,
+                                   void * user_ptr);
+
+/** Destroy a stream. `cubeb_stream_stop` MUST be called before destroying a
+    stream.
+    @param stream The stream to destroy. */
+CUBEB_EXPORT void cubeb_stream_destroy(cubeb_stream * stream);
+
+/** Start playback.
+    @param stream
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR */
+CUBEB_EXPORT int cubeb_stream_start(cubeb_stream * stream);
+
+/** Stop playback.
+    @param stream
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR */
+CUBEB_EXPORT int cubeb_stream_stop(cubeb_stream * stream);
+
+/** Reset stream to the default device.
+    @param stream
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_INVALID_PARAMETER
+    @retval CUBEB_ERROR_NOT_SUPPORTED
+    @retval CUBEB_ERROR */
+CUBEB_EXPORT int cubeb_stream_reset_default_device(cubeb_stream * stream);
+
+/** Get the current stream playback position.
+    @param stream
+    @param position Playback position in frames.
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR */
+CUBEB_EXPORT int cubeb_stream_get_position(cubeb_stream * stream, uint64_t * position);
+
+/** Get the latency for this stream, in frames. This is the number of frames
+    between the time cubeb acquires the data in the callback and the listener
+    can hear the sound.
+    @param stream
+    @param latency Current approximate stream latency in frames.
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_NOT_SUPPORTED
+    @retval CUBEB_ERROR */
+CUBEB_EXPORT int cubeb_stream_get_latency(cubeb_stream * stream, uint32_t * latency);
+
+/** Set the volume for a stream.
+    @param stream the stream for which to adjust the volume.
+    @param volume a float between 0.0 (muted) and 1.0 (maximum volume)
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_INVALID_PARAMETER volume is outside [0.0, 1.0] or
+            stream is an invalid pointer
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_stream_set_volume(cubeb_stream * stream, float volume);
+
+/** Get the current output device for this stream.
+    @param stm the stream for which to query the current output device
+    @param device a pointer in which the current output device will be stored.
+    @retval CUBEB_OK in case of success
+    @retval CUBEB_ERROR_INVALID_PARAMETER if either stm, device or count are
+            invalid pointers
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_stream_get_current_device(cubeb_stream * stm,
+                                                 cubeb_device ** const device);
+
+/** Destroy a cubeb_device structure.
+    @param stream the stream passed in cubeb_stream_get_current_device
+    @param devices the devices to destroy
+    @retval CUBEB_OK in case of success
+    @retval CUBEB_ERROR_INVALID_PARAMETER if devices is an invalid pointer
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_stream_device_destroy(cubeb_stream * stream,
+                                             cubeb_device * devices);
+
+/** Set a callback to be notified when the output device changes.
+    @param stream the stream for which to set the callback.
+    @param device_changed_callback a function called whenever the device has
+           changed. Passing NULL allow to unregister a function
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_INVALID_PARAMETER if either stream or
+            device_changed_callback are invalid pointers.
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_stream_register_device_changed_callback(cubeb_stream * stream,
+                                                               cubeb_device_changed_callback device_changed_callback);
+
+/** Return the user data pointer registered with the stream with cubeb_stream_init.
+    @param stream the stream for which to retrieve user data pointer.
+    @retval user data pointer */
+CUBEB_EXPORT void * cubeb_stream_user_ptr(cubeb_stream * stream);
+
+/** Returns enumerated devices.
+    @param context
+    @param devtype device type to include
+    @param collection output collection. Must be destroyed with cubeb_device_collection_destroy
+    @retval CUBEB_OK in case of success
+    @retval CUBEB_ERROR_INVALID_PARAMETER if collection is an invalid pointer
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_enumerate_devices(cubeb * context,
+                                         cubeb_device_type devtype,
+                                         cubeb_device_collection * collection);
+
+/** Destroy a cubeb_device_collection, and its `cubeb_device_info`.
+    @param context
+    @param collection collection to destroy
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR_INVALID_PARAMETER if collection is an invalid pointer */
+CUBEB_EXPORT int cubeb_device_collection_destroy(cubeb * context,
+                                                 cubeb_device_collection * collection);
+
+/** Registers a callback which is called when the system detects
+    a new device or a device is removed.
+    @param context
+    @param devtype device type to include. Different callbacks and user pointers
+           can be registered for each devtype. The hybrid devtype
+           `CUBEB_DEVICE_TYPE_INPUT | CUBEB_DEVICE_TYPE_OUTPUT` is also valid
+           and will register the provided callback and user pointer in both sides.
+    @param callback a function called whenever the system device list changes.
+           Passing NULL allow to unregister a function. You have to unregister
+           first before you register a new callback.
+    @param user_ptr pointer to user specified data which will be present in
+           subsequent callbacks.
+    @retval CUBEB_ERROR_NOT_SUPPORTED */
+CUBEB_EXPORT int cubeb_register_device_collection_changed(cubeb * context,
+                                                          cubeb_device_type devtype,
+                                                          cubeb_device_collection_changed_callback callback,
+                                                          void * user_ptr);
+
+/** Set a callback to be called with a message.
+    @param log_level CUBEB_LOG_VERBOSE, CUBEB_LOG_NORMAL.
+    @param log_callback A function called with a message when there is
+                        something to log. Pass NULL to unregister.
+    @retval CUBEB_OK in case of success.
+    @retval CUBEB_ERROR_INVALID_PARAMETER if either context or log_callback are
+                                          invalid pointers, or if level is not
+                                          in cubeb_log_level. */
+CUBEB_EXPORT int cubeb_set_log_callback(cubeb_log_level log_level,
+                                        cubeb_log_callback log_callback);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* CUBEB_c2f983e9_c96f_e71c_72c3_bbf62992a382 */

dep/cubeb/include/cubeb/cubeb_export.h

@@ -0,0 +1,12 @@
+#ifndef CUBEB_EXPORT_H
+#define CUBEB_EXPORT_H
+
+#define CUBEB_EXPORT
+#define CUBEB_NO_EXPORT
+
+#ifdef WIN32
+#pragma comment(lib, "winmm.lib")
+#pragma comment(lib, "avrt.lib")
+#endif
+
+#endif

dep/cubeb/src/android/audiotrack_definitions.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdint.h>
+
+/*
+ * The following definitions are copied from the android sources. Only the
+ * relevant enum member and values needed are copied.
+ */
+
+/*
+ * From https://android.googlesource.com/platform/frameworks/base/+/android-2.2.3_r2.1/include/utils/Errors.h
+ */
+typedef int32_t status_t;
+
+/*
+ * From https://android.googlesource.com/platform/frameworks/base/+/android-2.2.3_r2.1/include/media/AudioTrack.h
+ */
+struct Buffer {
+  uint32_t    flags;
+  int         channelCount;
+  int         format;
+  size_t      frameCount;
+  size_t      size;
+  union {
+    void*       raw;
+    short*      i16;
+    int8_t*     i8;
+  };
+};
+
+enum event_type {
+  EVENT_MORE_DATA = 0,
+  EVENT_UNDERRUN = 1,
+  EVENT_LOOP_END = 2,
+  EVENT_MARKER = 3,
+  EVENT_NEW_POS = 4,
+  EVENT_BUFFER_END = 5
+};
+
+/**
+ * From https://android.googlesource.com/platform/frameworks/base/+/android-2.2.3_r2.1/include/media/AudioSystem.h
+ * and 
+ * https://android.googlesource.com/platform/system/core/+/android-4.2.2_r1/include/system/audio.h
+ */
+
+#define AUDIO_STREAM_TYPE_MUSIC 3
+
+enum {
+  AUDIO_CHANNEL_OUT_FRONT_LEFT_ICS  = 0x1,
+  AUDIO_CHANNEL_OUT_FRONT_RIGHT_ICS = 0x2,
+  AUDIO_CHANNEL_OUT_MONO_ICS     = AUDIO_CHANNEL_OUT_FRONT_LEFT_ICS,
+  AUDIO_CHANNEL_OUT_STEREO_ICS   = (AUDIO_CHANNEL_OUT_FRONT_LEFT_ICS | AUDIO_CHANNEL_OUT_FRONT_RIGHT_ICS)
+} AudioTrack_ChannelMapping_ICS;
+
+enum {
+  AUDIO_CHANNEL_OUT_FRONT_LEFT_Legacy = 0x4,
+  AUDIO_CHANNEL_OUT_FRONT_RIGHT_Legacy = 0x8,
+  AUDIO_CHANNEL_OUT_MONO_Legacy = AUDIO_CHANNEL_OUT_FRONT_LEFT_Legacy,
+  AUDIO_CHANNEL_OUT_STEREO_Legacy = (AUDIO_CHANNEL_OUT_FRONT_LEFT_Legacy | AUDIO_CHANNEL_OUT_FRONT_RIGHT_Legacy)
+} AudioTrack_ChannelMapping_Legacy;
+
+typedef enum {
+  AUDIO_FORMAT_PCM = 0x00000000,
+  AUDIO_FORMAT_PCM_SUB_16_BIT = 0x1,
+  AUDIO_FORMAT_PCM_16_BIT = (AUDIO_FORMAT_PCM | AUDIO_FORMAT_PCM_SUB_16_BIT),
+} AudioTrack_SampleType;
+

dep/cubeb/src/android/cubeb-output-latency.h

@@ -0,0 +1,76 @@
+#ifndef _CUBEB_OUTPUT_LATENCY_H_
+#define _CUBEB_OUTPUT_LATENCY_H_
+
+#include <stdbool.h>
+#include "cubeb_media_library.h"
+#include "../cubeb-jni.h"
+
+struct output_latency_function {
+  media_lib * from_lib;
+  cubeb_jni * from_jni;
+  int version;
+};
+
+typedef struct output_latency_function output_latency_function;
+
+const int ANDROID_JELLY_BEAN_MR1_4_2 = 17;
+
+output_latency_function *
+cubeb_output_latency_load_method(int version)
+{
+  output_latency_function * ol = NULL;
+  ol = calloc(1, sizeof(output_latency_function));
+
+  ol->version = version;
+
+  if (ol->version > ANDROID_JELLY_BEAN_MR1_4_2){
+    ol->from_jni = cubeb_jni_init();
+    return ol;
+  }
+
+  ol->from_lib = cubeb_load_media_library();
+  return ol;
+}
+
+bool
+cubeb_output_latency_method_is_loaded(output_latency_function * ol)
+{
+  assert(ol);
+  if (ol->version > ANDROID_JELLY_BEAN_MR1_4_2){
+    return !!ol->from_jni;
+  }
+
+  return !!ol->from_lib;
+}
+
+void
+cubeb_output_latency_unload_method(output_latency_function * ol)
+{
+  if (!ol) {
+    return;
+  }
+
+  if (ol->version > ANDROID_JELLY_BEAN_MR1_4_2 && ol->from_jni) {
+    cubeb_jni_destroy(ol->from_jni);
+  }
+
+  if (ol->version <= ANDROID_JELLY_BEAN_MR1_4_2 && ol->from_lib) {
+    cubeb_close_media_library(ol->from_lib);
+  }
+
+  free(ol);
+}
+
+uint32_t
+cubeb_get_output_latency(output_latency_function * ol)
+{
+  assert(cubeb_output_latency_method_is_loaded(ol));
+
+  if (ol->version > ANDROID_JELLY_BEAN_MR1_4_2){
+    return cubeb_get_output_latency_from_jni(ol->from_jni);
+  }
+
+  return cubeb_get_output_latency_from_media_library(ol->from_lib);
+}
+
+#endif // _CUBEB_OUTPUT_LATENCY_H_

dep/cubeb/src/android/cubeb_media_library.h

@@ -0,0 +1,62 @@
+#ifndef _CUBEB_MEDIA_LIBRARY_H_
+#define _CUBEB_MEDIA_LIBRARY_H_
+
+struct media_lib {
+  void * libmedia;
+  int32_t (* get_output_latency)(uint32_t * latency, int stream_type);
+};
+
+typedef struct media_lib media_lib;
+
+media_lib *
+cubeb_load_media_library()
+{
+  media_lib ml = {0};
+  ml.libmedia = dlopen("libmedia.so", RTLD_LAZY);
+  if (!ml.libmedia) {
+    return NULL;
+  }
+
+  // Get the latency, in ms, from AudioFlinger. First, try the most recent signature.
+  // status_t AudioSystem::getOutputLatency(uint32_t* latency, audio_stream_type_t streamType)
+  ml.get_output_latency =
+    dlsym(ml.libmedia, "_ZN7android11AudioSystem16getOutputLatencyEPj19audio_stream_type_t");
+  if (!ml.get_output_latency) {
+    // In case of failure, try the signature from legacy version.
+    // status_t AudioSystem::getOutputLatency(uint32_t* latency, int streamType)
+    ml.get_output_latency =
+      dlsym(ml.libmedia, "_ZN7android11AudioSystem16getOutputLatencyEPji");
+    if (!ml.get_output_latency) {
+      return NULL;
+    }
+  }
+
+  media_lib * rv = NULL;
+  rv = calloc(1, sizeof(media_lib));
+  assert(rv);
+  *rv = ml;
+  return rv;
+}
+
+void
+cubeb_close_media_library(media_lib * ml)
+{
+  dlclose(ml->libmedia);
+  ml->libmedia = NULL;
+  ml->get_output_latency = NULL;
+  free(ml);
+}
+
+uint32_t
+cubeb_get_output_latency_from_media_library(media_lib * ml)
+{
+  uint32_t latency = 0;
+  const int audio_stream_type_music = 3;
+  int32_t r = ml->get_output_latency(&latency, audio_stream_type_music);
+  if (r) {
+    return 0;
+  }
+  return latency;
+}
+
+#endif // _CUBEB_MEDIA_LIBRARY_H_

dep/cubeb/src/android/sles_definitions.h

@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * This file is similar to the file "OpenSLES_AndroidConfiguration.h" found in
+ * the Android NDK, but removes the #ifdef __cplusplus defines, so we can keep
+ * using a C compiler in cubeb.
+ */
+
+#ifndef OPENSL_ES_ANDROIDCONFIGURATION_H_
+#define OPENSL_ES_ANDROIDCONFIGURATION_H_
+
+/*---------------------------------------------------------------------------*/
+/* Android AudioRecorder configuration                                       */
+/*---------------------------------------------------------------------------*/
+
+/** Audio recording preset */
+/** Audio recording preset key */
+#define SL_ANDROID_KEY_RECORDING_PRESET ((const SLchar*) "androidRecordingPreset")
+/** Audio recording preset values */
+/**   preset "none" cannot be set, it is used to indicate the current settings
+ *     do not match any of the presets. */
+#define SL_ANDROID_RECORDING_PRESET_NONE                ((SLuint32) 0x00000000)
+/**   generic recording configuration on the platform */
+#define SL_ANDROID_RECORDING_PRESET_GENERIC             ((SLuint32) 0x00000001)
+/**   uses the microphone audio source with the same orientation as the camera
+ *     if available, the main device microphone otherwise */
+#define SL_ANDROID_RECORDING_PRESET_CAMCORDER           ((SLuint32) 0x00000002)
+/**   uses the main microphone tuned for voice recognition */
+#define SL_ANDROID_RECORDING_PRESET_VOICE_RECOGNITION   ((SLuint32) 0x00000003)
+/**   uses the main microphone tuned for audio communications */
+#define SL_ANDROID_RECORDING_PRESET_VOICE_COMMUNICATION ((SLuint32) 0x00000004)
+/**   uses the main microphone unprocessed */
+#define SL_ANDROID_RECORDING_PRESET_UNPROCESSED         ((SLuint32) 0x00000005)
+
+
+/*---------------------------------------------------------------------------*/
+/* Android AudioPlayer configuration                                         */
+/*---------------------------------------------------------------------------*/
+
+/** Audio playback stream type */
+/** Audio playback stream type key */
+#define SL_ANDROID_KEY_STREAM_TYPE ((const SLchar*) "androidPlaybackStreamType")
+
+/** Audio playback stream type  values */
+/*      same as android.media.AudioManager.STREAM_VOICE_CALL */
+#define SL_ANDROID_STREAM_VOICE        ((SLint32) 0x00000000)
+/*      same as android.media.AudioManager.STREAM_SYSTEM */
+#define SL_ANDROID_STREAM_SYSTEM       ((SLint32) 0x00000001)
+/*      same as android.media.AudioManager.STREAM_RING */
+#define SL_ANDROID_STREAM_RING         ((SLint32) 0x00000002)
+/*      same as android.media.AudioManager.STREAM_MUSIC */
+#define SL_ANDROID_STREAM_MEDIA        ((SLint32) 0x00000003)
+/*      same as android.media.AudioManager.STREAM_ALARM */
+#define SL_ANDROID_STREAM_ALARM        ((SLint32) 0x00000004)
+/*      same as android.media.AudioManager.STREAM_NOTIFICATION */
+#define SL_ANDROID_STREAM_NOTIFICATION ((SLint32) 0x00000005)
+
+
+/*---------------------------------------------------------------------------*/
+/* Android AudioPlayer and AudioRecorder configuration                       */
+/*---------------------------------------------------------------------------*/
+
+/** Audio Performance mode.
+ * Performance mode tells the framework how to configure the audio path
+ * for a player or recorder according to application performance and
+ * functional requirements.
+ * It affects the output or input latency based on acceptable tradeoffs on
+ * battery drain and use of pre or post processing effects.
+ * Performance mode should be set before realizing the object and should be
+ * read after realizing the object to check if the requested mode could be
+ * granted or not.
+ */
+/** Audio Performance mode key */
+#define SL_ANDROID_KEY_PERFORMANCE_MODE ((const SLchar*) "androidPerformanceMode")
+
+/** Audio performance values */
+/*      No specific performance requirement. Allows HW and SW pre/post processing. */
+#define SL_ANDROID_PERFORMANCE_NONE ((SLuint32) 0x00000000)
+/*      Priority given to latency. No HW or software pre/post processing.
+ *      This is the default if no performance mode is specified. */
+#define SL_ANDROID_PERFORMANCE_LATENCY ((SLuint32) 0x00000001)
+/*      Priority given to latency while still allowing HW pre and post processing. */
+#define SL_ANDROID_PERFORMANCE_LATENCY_EFFECTS ((SLuint32) 0x00000002)
+/*      Priority given to power saving if latency is not a concern.
+ *      Allows HW and SW pre/post processing. */
+#define SL_ANDROID_PERFORMANCE_POWER_SAVING ((SLuint32) 0x00000003)
+
+#endif /* OPENSL_ES_ANDROIDCONFIGURATION_H_ */

dep/cubeb/src/cubeb-internal.h

@@ -0,0 +1,79 @@
+/*
+ * Copyright © 2013 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#if !defined(CUBEB_INTERNAL_0eb56756_4e20_4404_a76d_42bf88cd15a5)
+#define CUBEB_INTERNAL_0eb56756_4e20_4404_a76d_42bf88cd15a5
+
+#include "cubeb/cubeb.h"
+#include "cubeb_log.h"
+#include "cubeb_assert.h"
+#include <stdio.h>
+#include <string.h>
+
+#ifdef __clang__
+#ifndef CLANG_ANALYZER_NORETURN
+#if __has_feature(attribute_analyzer_noreturn)
+#define CLANG_ANALYZER_NORETURN __attribute__((analyzer_noreturn))
+#else
+#define CLANG_ANALYZER_NORETURN
+#endif // ifndef CLANG_ANALYZER_NORETURN
+#endif // __has_feature(attribute_analyzer_noreturn)
+#else // __clang__
+#define CLANG_ANALYZER_NORETURN
+#endif
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#if defined(__cplusplus)
+}
+#endif
+
+struct cubeb_ops {
+  int (* init)(cubeb ** context, char const * context_name);
+  char const * (* get_backend_id)(cubeb * context);
+  int (* get_max_channel_count)(cubeb * context, uint32_t * max_channels);
+  int (* get_min_latency)(cubeb * context,
+                          cubeb_stream_params params,
+                          uint32_t * latency_ms);
+  int (* get_preferred_sample_rate)(cubeb * context, uint32_t * rate);
+  int (* enumerate_devices)(cubeb * context, cubeb_device_type type,
+                            cubeb_device_collection * collection);
+  int (* device_collection_destroy)(cubeb * context,
+                                    cubeb_device_collection * collection);
+  void (* destroy)(cubeb * context);
+  int (* stream_init)(cubeb * context,
+                      cubeb_stream ** stream,
+                      char const * stream_name,
+                      cubeb_devid input_device,
+                      cubeb_stream_params * input_stream_params,
+                      cubeb_devid output_device,
+                      cubeb_stream_params * output_stream_params,
+                      unsigned int latency,
+                      cubeb_data_callback data_callback,
+                      cubeb_state_callback state_callback,
+                      void * user_ptr);
+  void (* stream_destroy)(cubeb_stream * stream);
+  int (* stream_start)(cubeb_stream * stream);
+  int (* stream_stop)(cubeb_stream * stream);
+  int (* stream_reset_default_device)(cubeb_stream * stream);
+  int (* stream_get_position)(cubeb_stream * stream, uint64_t * position);
+  int (* stream_get_latency)(cubeb_stream * stream, uint32_t * latency);
+  int (* stream_set_volume)(cubeb_stream * stream, float volumes);
+  int (* stream_get_current_device)(cubeb_stream * stream,
+                                    cubeb_device ** const device);
+  int (* stream_device_destroy)(cubeb_stream * stream,
+                                cubeb_device * device);
+  int (* stream_register_device_changed_callback)(cubeb_stream * stream,
+                                                  cubeb_device_changed_callback device_changed_callback);
+  int (* register_device_collection_changed)(cubeb * context,
+                                             cubeb_device_type devtype,
+                                             cubeb_device_collection_changed_callback callback,
+                                             void * user_ptr);
+};
+
+#endif /* CUBEB_INTERNAL_0eb56756_4e20_4404_a76d_42bf88cd15a5 */

dep/cubeb/src/cubeb-jni-instances.h

@@ -0,0 +1,30 @@
+#ifndef _CUBEB_JNI_INSTANCES_H_
+#define _CUBEB_JNI_INSTANCES_H_
+
+/*
+ * The methods in this file offer a way to pass in the required
+ * JNI instances in the cubeb library. By default they return NULL.
+ * In this case part of the cubeb API that depends on JNI
+ * will return CUBEB_ERROR_NOT_SUPPORTED. Currently only one
+ * method depends on that:
+ *
+ * cubeb_stream_get_position()
+ *
+ * Users that want to use that cubeb API method must "override"
+ * the methods bellow to return a valid instance of JavaVM
+ * and application's Context object.
+ * */
+
+JNIEnv *
+cubeb_get_jni_env_for_thread()
+{
+  return nullptr;
+}
+
+jobject
+cubeb_jni_get_context_instance()
+{
+  return nullptr;
+}
+
+#endif //_CUBEB_JNI_INSTANCES_H_

dep/cubeb/src/cubeb-jni.cpp

@@ -0,0 +1,68 @@
+#include "jni.h"
+#include <assert.h>
+#include "cubeb-jni-instances.h"
+
+#define AUDIO_STREAM_TYPE_MUSIC 3
+
+struct cubeb_jni {
+  jobject s_audio_manager_obj = nullptr;
+  jclass s_audio_manager_class = nullptr;
+  jmethodID s_get_output_latency_id = nullptr;
+};
+
+extern "C"
+cubeb_jni *
+cubeb_jni_init()
+{
+  jobject ctx_obj = cubeb_jni_get_context_instance();
+  JNIEnv * jni_env = cubeb_get_jni_env_for_thread();
+  if (!jni_env || !ctx_obj) {
+    return nullptr;
+  }
+
+  cubeb_jni * cubeb_jni_ptr = new cubeb_jni;
+  assert(cubeb_jni_ptr);
+
+  // Find the audio manager object and make it global to call it from another method
+  jclass context_class = jni_env->FindClass("android/content/Context");
+  jfieldID audio_service_field = jni_env->GetStaticFieldID(context_class, "AUDIO_SERVICE", "Ljava/lang/String;");
+  jstring jstr = (jstring)jni_env->GetStaticObjectField(context_class, audio_service_field);
+  jmethodID get_system_service_id = jni_env->GetMethodID(context_class, "getSystemService", "(Ljava/lang/String;)Ljava/lang/Object;");
+  jobject audio_manager_obj = jni_env->CallObjectMethod(ctx_obj, get_system_service_id, jstr);
+  cubeb_jni_ptr->s_audio_manager_obj = reinterpret_cast<jobject>(jni_env->NewGlobalRef(audio_manager_obj));
+
+  // Make the audio manager class a global reference in order to preserve method id
+  jclass audio_manager_class = jni_env->FindClass("android/media/AudioManager");
+  cubeb_jni_ptr->s_audio_manager_class = reinterpret_cast<jclass>(jni_env->NewGlobalRef(audio_manager_class));
+  cubeb_jni_ptr->s_get_output_latency_id = jni_env->GetMethodID (audio_manager_class, "getOutputLatency", "(I)I");
+
+  jni_env->DeleteLocalRef(ctx_obj);
+  jni_env->DeleteLocalRef(context_class);
+  jni_env->DeleteLocalRef(jstr);
+  jni_env->DeleteLocalRef(audio_manager_obj);
+  jni_env->DeleteLocalRef(audio_manager_class);
+
+  return cubeb_jni_ptr;
+}
+
+extern "C"
+int cubeb_get_output_latency_from_jni(cubeb_jni * cubeb_jni_ptr)
+{
+  assert(cubeb_jni_ptr);
+  JNIEnv * jni_env = cubeb_get_jni_env_for_thread();
+  return jni_env->CallIntMethod(cubeb_jni_ptr->s_audio_manager_obj, cubeb_jni_ptr->s_get_output_latency_id, AUDIO_STREAM_TYPE_MUSIC); //param: AudioManager.STREAM_MUSIC
+}
+
+extern "C"
+void cubeb_jni_destroy(cubeb_jni * cubeb_jni_ptr)
+{
+  assert(cubeb_jni_ptr);
+
+  JNIEnv * jni_env = cubeb_get_jni_env_for_thread();
+  assert(jni_env);
+
+  jni_env->DeleteGlobalRef(cubeb_jni_ptr->s_audio_manager_obj);
+  jni_env->DeleteGlobalRef(cubeb_jni_ptr->s_audio_manager_class);
+
+  delete cubeb_jni_ptr;
+}

dep/cubeb/src/cubeb-jni.h

@@ -0,0 +1,10 @@
+#ifndef _CUBEB_JNI_H_
+#define _CUBEB_JNI_H_
+
+typedef struct cubeb_jni cubeb_jni;
+
+cubeb_jni * cubeb_jni_init();
+int cubeb_get_output_latency_from_jni(cubeb_jni * cubeb_jni_ptr);
+void cubeb_jni_destroy(cubeb_jni * cubeb_jni_ptr);
+
+#endif // _CUBEB_JNI_H_

dep/cubeb/src/cubeb-sles.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef _CUBEB_SLES_H_
+#define _CUBEB_SLES_H_
+#include <SLES/OpenSLES.h>
+
+static SLresult
+cubeb_get_sles_engine(SLObjectItf * pEngine,
+                      SLuint32 numOptions,
+                      const SLEngineOption * pEngineOptions,
+                      SLuint32 numInterfaces,
+                      const SLInterfaceID * pInterfaceIds,
+                      const SLboolean * pInterfaceRequired)
+{
+  return slCreateEngine(pEngine,
+                        numOptions,
+                        pEngineOptions,
+                        numInterfaces,
+                        pInterfaceIds,
+                        pInterfaceRequired);
+}
+
+static void
+cubeb_destroy_sles_engine(SLObjectItf * self)
+{
+  if (*self != NULL) {
+      (**self)->Destroy(*self);
+      *self = NULL;
+  }
+}
+
+static SLresult
+cubeb_realize_sles_engine(SLObjectItf self)
+{
+  return (*self)->Realize(self, SL_BOOLEAN_FALSE);
+}
+
+#endif

dep/cubeb/src/cubeb-speex-resampler.h

@@ -0,0 +1 @@
+#include <speex/speex_resampler.h>

dep/cubeb/src/cubeb.c

@@ -0,0 +1,665 @@
+/*
+ * Copyright © 2013 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#undef NDEBUG
+#include <assert.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cubeb/cubeb.h"
+#include "cubeb-internal.h"
+
+#define NELEMS(x) ((int) (sizeof(x) / sizeof(x[0])))
+
+struct cubeb {
+  struct cubeb_ops * ops;
+};
+
+struct cubeb_stream {
+  /*
+   * Note: All implementations of cubeb_stream must keep the following
+   * layout.
+   */
+  struct cubeb * context;
+  void * user_ptr;
+};
+
+#if defined(USE_PULSE)
+int pulse_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_PULSE_RUST)
+int pulse_rust_init(cubeb ** contet, char const * context_name);
+#endif
+#if defined(USE_JACK)
+int jack_init (cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_ALSA)
+int alsa_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_AUDIOUNIT)
+int audiounit_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_AUDIOUNIT_RUST)
+int audiounit_rust_init(cubeb ** contet, char const * context_name);
+#endif
+#if defined(USE_WINMM)
+int winmm_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_WASAPI)
+int wasapi_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_SNDIO)
+int sndio_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_SUN)
+int sun_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_OPENSL)
+int opensl_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_AUDIOTRACK)
+int audiotrack_init(cubeb ** context, char const * context_name);
+#endif
+#if defined(USE_KAI)
+int kai_init(cubeb ** context, char const * context_name);
+#endif
+
+static int
+validate_stream_params(cubeb_stream_params * input_stream_params,
+                       cubeb_stream_params * output_stream_params)
+{
+  XASSERT(input_stream_params || output_stream_params);
+  if (output_stream_params) {
+    if (output_stream_params->rate < 1000 || output_stream_params->rate > 192000 ||
+        output_stream_params->channels < 1 || output_stream_params->channels > UINT8_MAX) {
+      return CUBEB_ERROR_INVALID_FORMAT;
+    }
+  }
+  if (input_stream_params) {
+    if (input_stream_params->rate < 1000 || input_stream_params->rate > 192000 ||
+        input_stream_params->channels < 1 || input_stream_params->channels > 8) {
+      return CUBEB_ERROR_INVALID_FORMAT;
+    }
+  }
+  // Rate and sample format must be the same for input and output, if using a
+  // duplex stream
+  if (input_stream_params && output_stream_params) {
+    if (input_stream_params->rate != output_stream_params->rate  ||
+        input_stream_params->format != output_stream_params->format) {
+      return CUBEB_ERROR_INVALID_FORMAT;
+    }
+  }
+
+  cubeb_stream_params * params = input_stream_params ?
+                                 input_stream_params : output_stream_params;
+
+  switch (params->format) {
+  case CUBEB_SAMPLE_S16LE:
+  case CUBEB_SAMPLE_S16BE:
+  case CUBEB_SAMPLE_FLOAT32LE:
+  case CUBEB_SAMPLE_FLOAT32BE:
+    return CUBEB_OK;
+  }
+
+  return CUBEB_ERROR_INVALID_FORMAT;
+}
+
+static int
+validate_latency(int latency)
+{
+  if (latency < 1 || latency > 96000) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+  return CUBEB_OK;
+}
+
+int
+cubeb_init(cubeb ** context, char const * context_name, char const * backend_name)
+{
+  int (* init_oneshot)(cubeb **, char const *) = NULL;
+
+  if (backend_name != NULL) {
+    if (!strcmp(backend_name, "pulse")) {
+#if defined(USE_PULSE)
+      init_oneshot = pulse_init;
+#endif
+    } else if (!strcmp(backend_name, "pulse-rust")) {
+#if defined(USE_PULSE_RUST)
+      init_oneshot = pulse_rust_init;
+#endif
+    } else if (!strcmp(backend_name, "jack")) {
+#if defined(USE_JACK)
+      init_oneshot = jack_init;
+#endif
+    } else if (!strcmp(backend_name, "alsa")) {
+#if defined(USE_ALSA)
+      init_oneshot = alsa_init;
+#endif
+    } else if (!strcmp(backend_name, "audiounit")) {
+#if defined(USE_AUDIOUNIT)
+      init_oneshot = audiounit_init;
+#endif
+    } else if (!strcmp(backend_name, "audiounit-rust")) {
+#if defined(USE_AUDIOUNIT_RUST)
+      init_oneshot = audiounit_rust_init;
+#endif
+    } else if (!strcmp(backend_name, "wasapi")) {
+#if defined(USE_WASAPI)
+      init_oneshot = wasapi_init;
+#endif
+    } else if (!strcmp(backend_name, "winmm")) {
+#if defined(USE_WINMM)
+      init_oneshot = winmm_init;
+#endif
+    } else if (!strcmp(backend_name, "sndio")) {
+#if defined(USE_SNDIO)
+      init_oneshot = sndio_init;
+#endif
+    } else if (!strcmp(backend_name, "sun")) {
+#if defined(USE_SUN)
+      init_oneshot = sun_init;
+#endif
+    } else if (!strcmp(backend_name, "opensl")) {
+#if defined(USE_OPENSL)
+      init_oneshot = opensl_init;
+#endif
+    } else if (!strcmp(backend_name, "audiotrack")) {
+#if defined(USE_AUDIOTRACK)
+      init_oneshot = audiotrack_init;
+#endif
+    } else if (!strcmp(backend_name, "kai")) {
+#if defined(USE_KAI)
+      init_oneshot = kai_init;
+#endif
+    } else {
+      /* Already set */
+    }
+  }
+
+  int (* default_init[])(cubeb **, char const *) = {
+    /*
+     * init_oneshot must be at the top to allow user
+     * to override all other choices
+     */
+    init_oneshot,
+#if defined(USE_PULSE_RUST)
+    pulse_rust_init,
+#endif
+#if defined(USE_PULSE)
+    pulse_init,
+#endif
+#if defined(USE_JACK)
+    jack_init,
+#endif
+#if defined(USE_SNDIO)
+    sndio_init,
+#endif
+#if defined(USE_ALSA)
+    alsa_init,
+#endif
+#if defined(USE_AUDIOUNIT)
+    audiounit_init,
+#endif
+#if defined(USE_AUDIOUNIT_RUST)
+    audiounit_rust_init,
+#endif
+#if defined(USE_WASAPI)
+    wasapi_init,
+#endif
+#if defined(USE_WINMM)
+    winmm_init,
+#endif
+#if defined(USE_SUN)
+    sun_init,
+#endif
+#if defined(USE_OPENSL)
+    opensl_init,
+#endif
+#if defined(USE_AUDIOTRACK)
+    audiotrack_init,
+#endif
+#if defined(USE_KAI)
+    kai_init,
+#endif
+  };
+  int i;
+
+  if (!context) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+#define OK(fn) assert((* context)->ops->fn)
+  for (i = 0; i < NELEMS(default_init); ++i) {
+    if (default_init[i] && default_init[i](context, context_name) == CUBEB_OK) {
+      /* Assert that the minimal API is implemented. */
+      OK(get_backend_id);
+      OK(destroy);
+      OK(stream_init);
+      OK(stream_destroy);
+      OK(stream_start);
+      OK(stream_stop);
+      OK(stream_get_position);
+      return CUBEB_OK;
+    }
+  }
+  return CUBEB_ERROR;
+}
+
+char const *
+cubeb_get_backend_id(cubeb * context)
+{
+  if (!context) {
+    return NULL;
+  }
+
+  return context->ops->get_backend_id(context);
+}
+
+int
+cubeb_get_max_channel_count(cubeb * context, uint32_t * max_channels)
+{
+  if (!context || !max_channels) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!context->ops->get_max_channel_count) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return context->ops->get_max_channel_count(context, max_channels);
+}
+
+int
+cubeb_get_min_latency(cubeb * context, cubeb_stream_params * params, uint32_t * latency_ms)
+{
+  if (!context || !params || !latency_ms) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!context->ops->get_min_latency) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return context->ops->get_min_latency(context, *params, latency_ms);
+}
+
+int
+cubeb_get_preferred_sample_rate(cubeb * context, uint32_t * rate)
+{
+  if (!context || !rate) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!context->ops->get_preferred_sample_rate) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return context->ops->get_preferred_sample_rate(context, rate);
+}
+
+void
+cubeb_destroy(cubeb * context)
+{
+  if (!context) {
+    return;
+  }
+
+  context->ops->destroy(context);
+}
+
+int
+cubeb_stream_init(cubeb * context, cubeb_stream ** stream, char const * stream_name,
+                  cubeb_devid input_device,
+                  cubeb_stream_params * input_stream_params,
+                  cubeb_devid output_device,
+                  cubeb_stream_params * output_stream_params,
+                  unsigned int latency,
+                  cubeb_data_callback data_callback,
+                  cubeb_state_callback state_callback,
+                  void * user_ptr)
+{
+  int r;
+
+  if (!context || !stream || !data_callback || !state_callback) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if ((r = validate_stream_params(input_stream_params, output_stream_params)) != CUBEB_OK ||
+      (r = validate_latency(latency)) != CUBEB_OK) {
+    return r;
+  }
+
+  r = context->ops->stream_init(context, stream, stream_name,
+                                input_device,
+                                input_stream_params,
+                                output_device,
+                                output_stream_params,
+                                latency,
+                                data_callback,
+                                state_callback,
+                                user_ptr);
+
+  if (r == CUBEB_ERROR_INVALID_FORMAT) {
+    LOG("Invalid format, %p %p %d %d",
+        output_stream_params, input_stream_params,
+        output_stream_params && output_stream_params->format,
+        input_stream_params && input_stream_params->format);
+  }
+
+  return r;
+}
+
+void
+cubeb_stream_destroy(cubeb_stream * stream)
+{
+  if (!stream) {
+    return;
+  }
+
+  stream->context->ops->stream_destroy(stream);
+}
+
+int
+cubeb_stream_start(cubeb_stream * stream)
+{
+  if (!stream) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  return stream->context->ops->stream_start(stream);
+}
+
+int
+cubeb_stream_stop(cubeb_stream * stream)
+{
+  if (!stream) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  return stream->context->ops->stream_stop(stream);
+}
+
+int
+cubeb_stream_reset_default_device(cubeb_stream * stream)
+{
+  if (!stream) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!stream->context->ops->stream_reset_default_device) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return stream->context->ops->stream_reset_default_device(stream);
+}
+
+int
+cubeb_stream_get_position(cubeb_stream * stream, uint64_t * position)
+{
+  if (!stream || !position) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  return stream->context->ops->stream_get_position(stream, position);
+}
+
+int
+cubeb_stream_get_latency(cubeb_stream * stream, uint32_t * latency)
+{
+  if (!stream || !latency) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!stream->context->ops->stream_get_latency) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return stream->context->ops->stream_get_latency(stream, latency);
+}
+
+int
+cubeb_stream_set_volume(cubeb_stream * stream, float volume)
+{
+  if (!stream || volume > 1.0 || volume < 0.0) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!stream->context->ops->stream_set_volume) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return stream->context->ops->stream_set_volume(stream, volume);
+}
+
+int cubeb_stream_get_current_device(cubeb_stream * stream,
+                                    cubeb_device ** const device)
+{
+  if (!stream || !device) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!stream->context->ops->stream_get_current_device) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return stream->context->ops->stream_get_current_device(stream, device);
+}
+
+int cubeb_stream_device_destroy(cubeb_stream * stream,
+                                cubeb_device * device)
+{
+  if (!stream || !device) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!stream->context->ops->stream_device_destroy) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return stream->context->ops->stream_device_destroy(stream, device);
+}
+
+int cubeb_stream_register_device_changed_callback(cubeb_stream * stream,
+                                                  cubeb_device_changed_callback device_changed_callback)
+{
+  if (!stream) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (!stream->context->ops->stream_register_device_changed_callback) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return stream->context->ops->stream_register_device_changed_callback(stream, device_changed_callback);
+}
+
+void * cubeb_stream_user_ptr(cubeb_stream * stream)
+{
+  if (!stream) {
+    return NULL;
+  }
+
+  return stream->user_ptr;
+}
+
+static
+void log_device(cubeb_device_info * device_info)
+{
+  char devfmts[128] = "";
+  const char * devtype, * devstate, * devdeffmt;
+
+  switch (device_info->type) {
+    case CUBEB_DEVICE_TYPE_INPUT:
+      devtype = "input";
+      break;
+    case CUBEB_DEVICE_TYPE_OUTPUT:
+      devtype = "output";
+      break;
+    case CUBEB_DEVICE_TYPE_UNKNOWN:
+    default:
+      devtype = "unknown?";
+      break;
+  };
+
+  switch (device_info->state) {
+    case CUBEB_DEVICE_STATE_DISABLED:
+      devstate = "disabled";
+      break;
+    case CUBEB_DEVICE_STATE_UNPLUGGED:
+      devstate = "unplugged";
+      break;
+    case CUBEB_DEVICE_STATE_ENABLED:
+      devstate = "enabled";
+      break;
+    default:
+      devstate = "unknown?";
+      break;
+  };
+
+  switch (device_info->default_format) {
+    case CUBEB_DEVICE_FMT_S16LE:
+      devdeffmt = "S16LE";
+      break;
+    case CUBEB_DEVICE_FMT_S16BE:
+      devdeffmt = "S16BE";
+      break;
+    case CUBEB_DEVICE_FMT_F32LE:
+      devdeffmt = "F32LE";
+      break;
+    case CUBEB_DEVICE_FMT_F32BE:
+      devdeffmt = "F32BE";
+      break;
+    default:
+      devdeffmt = "unknown?";
+      break;
+  };
+
+  if (device_info->format & CUBEB_DEVICE_FMT_S16LE) {
+    strcat(devfmts, " S16LE");
+  }
+  if (device_info->format & CUBEB_DEVICE_FMT_S16BE) {
+    strcat(devfmts, " S16BE");
+  }
+  if (device_info->format & CUBEB_DEVICE_FMT_F32LE) {
+    strcat(devfmts, " F32LE");
+  }
+  if (device_info->format & CUBEB_DEVICE_FMT_F32BE) {
+    strcat(devfmts, " F32BE");
+  }
+
+  LOG("DeviceID: \"%s\"%s\n"
+      "\tName:\t\"%s\"\n"
+      "\tGroup:\t\"%s\"\n"
+      "\tVendor:\t\"%s\"\n"
+      "\tType:\t%s\n"
+      "\tState:\t%s\n"
+      "\tMaximum channels:\t%u\n"
+      "\tFormat:\t%s (0x%x) (default: %s)\n"
+      "\tRate:\t[%u, %u] (default: %u)\n"
+      "\tLatency: lo %u frames, hi %u frames",
+      device_info->device_id, device_info->preferred ? " (PREFERRED)" : "",
+      device_info->friendly_name,
+      device_info->group_id,
+      device_info->vendor_name,
+      devtype,
+      devstate,
+      device_info->max_channels,
+      (devfmts[0] == '\0') ? devfmts : devfmts + 1, (unsigned int)device_info->format, devdeffmt,
+      device_info->min_rate, device_info->max_rate, device_info->default_rate,
+      device_info->latency_lo, device_info->latency_hi);
+}
+
+int cubeb_enumerate_devices(cubeb * context,
+                            cubeb_device_type devtype,
+                            cubeb_device_collection * collection)
+{
+  int rv;
+  if ((devtype & (CUBEB_DEVICE_TYPE_INPUT | CUBEB_DEVICE_TYPE_OUTPUT)) == 0)
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  if (collection == NULL)
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  if (!context->ops->enumerate_devices)
+    return CUBEB_ERROR_NOT_SUPPORTED;
+
+  rv = context->ops->enumerate_devices(context, devtype, collection);
+
+  if (g_cubeb_log_callback) {
+    for (size_t i = 0; i < collection->count; i++) {
+      log_device(&collection->device[i]);
+    }
+  }
+
+  return rv;
+}
+
+int cubeb_device_collection_destroy(cubeb * context,
+                                    cubeb_device_collection * collection)
+{
+  int r;
+
+  if (context == NULL || collection == NULL)
+    return CUBEB_ERROR_INVALID_PARAMETER;
+
+  if (!context->ops->device_collection_destroy)
+    return CUBEB_ERROR_NOT_SUPPORTED;
+
+  if (!collection->device)
+    return CUBEB_OK;
+
+  r = context->ops->device_collection_destroy(context, collection);
+  if (r == CUBEB_OK) {
+    collection->device = NULL;
+    collection->count = 0;
+  }
+
+  return r;
+}
+
+int cubeb_register_device_collection_changed(cubeb * context,
+                                             cubeb_device_type devtype,
+                                             cubeb_device_collection_changed_callback callback,
+                                             void * user_ptr)
+{
+  if (context == NULL || (devtype & (CUBEB_DEVICE_TYPE_INPUT | CUBEB_DEVICE_TYPE_OUTPUT)) == 0)
+    return CUBEB_ERROR_INVALID_PARAMETER;
+
+  if (!context->ops->register_device_collection_changed) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  return context->ops->register_device_collection_changed(context, devtype, callback, user_ptr);
+}
+
+int cubeb_set_log_callback(cubeb_log_level log_level,
+                           cubeb_log_callback log_callback)
+{
+  if (log_level < CUBEB_LOG_DISABLED || log_level > CUBEB_LOG_VERBOSE) {
+    return CUBEB_ERROR_INVALID_FORMAT;
+  }
+
+  if (!log_callback && log_level != CUBEB_LOG_DISABLED) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+
+  if (g_cubeb_log_callback && log_callback) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  g_cubeb_log_callback = log_callback;
+  g_cubeb_log_level = log_level;
+
+  // Logging a message here allows to initialize the asynchronous logger from a
+  // thread that is not the audio rendering thread, and especially to not
+  // initialize it the first time we find a verbose log, which is often in the
+  // audio rendering callback, that runs from the audio rendering thread, and
+  // that is high priority, and that we don't want to block.
+  if (log_level >= CUBEB_LOG_VERBOSE) {
+    ALOGV("Starting cubeb log");
+  }
+
+  return CUBEB_OK;
+}
+

dep/cubeb/src/cubeb_array_queue.h

@@ -0,0 +1,97 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef CUBEB_ARRAY_QUEUE_H
+#define CUBEB_ARRAY_QUEUE_H
+
+#include <assert.h>
+#include <pthread.h>
+#include <unistd.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+typedef struct
+{
+  void ** buf;
+  size_t num;
+  size_t writePos;
+  size_t readPos;
+  pthread_mutex_t mutex;
+} array_queue;
+
+array_queue * array_queue_create(size_t num)
+{
+  assert(num != 0);
+  array_queue * new_queue = (array_queue*)calloc(1, sizeof(array_queue));
+  new_queue->buf = (void **)calloc(1, sizeof(void *) * num);
+  new_queue->readPos = 0;
+  new_queue->writePos = 0;
+  new_queue->num = num;
+
+  pthread_mutex_init(&new_queue->mutex, NULL);
+
+  return new_queue;
+}
+
+void array_queue_destroy(array_queue * aq)
+{
+  assert(aq);
+
+  free(aq->buf);
+  pthread_mutex_destroy(&aq->mutex);
+  free(aq);
+}
+
+int array_queue_push(array_queue * aq, void * item)
+{
+  assert(item);
+
+  pthread_mutex_lock(&aq->mutex);
+  int ret = -1;
+  if(aq->buf[aq->writePos % aq->num] == NULL)
+  {
+    aq->buf[aq->writePos % aq->num] = item;
+    aq->writePos = (aq->writePos + 1) % aq->num;
+    ret = 0;
+  }
+  // else queue is full
+  pthread_mutex_unlock(&aq->mutex);
+  return ret;
+}
+
+void* array_queue_pop(array_queue * aq)
+{
+  pthread_mutex_lock(&aq->mutex);
+  void * value = aq->buf[aq->readPos % aq->num];
+  if(value)
+  {
+    aq->buf[aq->readPos % aq->num] = NULL;
+    aq->readPos = (aq->readPos + 1) % aq->num;
+  }
+  pthread_mutex_unlock(&aq->mutex);
+  return value;
+}
+
+size_t array_queue_get_size(array_queue * aq)
+{
+  pthread_mutex_lock(&aq->mutex);
+  ssize_t r = aq->writePos - aq->readPos;
+  if (r < 0) {
+    r = aq->num + r;
+    assert(r >= 0);
+  }
+  pthread_mutex_unlock(&aq->mutex);
+  return (size_t)r;
+}
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif //CUBE_ARRAY_QUEUE_H

dep/cubeb/src/cubeb_assert.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2017 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef CUBEB_ASSERT
+#define CUBEB_ASSERT
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/**
+ * This allow using an external release assert method. This file should only
+ * export a function or macro called XASSERT that aborts the program.
+ */
+
+#define XASSERT(expr) do {                                                     \
+    if (!(expr)) {                                                             \
+      fprintf(stderr, "%s:%d - fatal error: %s\n", __FILE__, __LINE__, #expr); \
+      abort();                                                                 \
+    }                                                                          \
+  } while (0)
+
+#endif

dep/cubeb/src/cubeb_audiotrack.c

@@ -0,0 +1,441 @@
+/*
+ * Copyright © 2013 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#if !defined(NDEBUG)
+#define NDEBUG
+#endif
+#include <assert.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <time.h>
+#include <dlfcn.h>
+#include <android/log.h>
+
+#include "cubeb/cubeb.h"
+#include "cubeb-internal.h"
+#include "android/audiotrack_definitions.h"
+
+#ifndef ALOG
+#if defined(DEBUG) || defined(FORCE_ALOG)
+#define ALOG(args...)  __android_log_print(ANDROID_LOG_INFO, "Gecko - Cubeb" , ## args)
+#else
+#define ALOG(args...)
+#endif
+#endif
+
+/**
+ * A lot of bytes for safety. It should be possible to bring this down a bit. */
+#define SIZE_AUDIOTRACK_INSTANCE 256
+
+/**
+ * call dlsym to get the symbol |mangled_name|, handle the error and store the
+ * pointer in |pointer|. Because depending on Android version, we want different
+ * symbols, not finding a symbol is not an error. */
+#define DLSYM_DLERROR(mangled_name, pointer, lib)                       \
+  do {                                                                  \
+    pointer = dlsym(lib, mangled_name);                                 \
+    if (!pointer) {                                                     \
+      ALOG("error while loading %stm: %stm\n", mangled_name, dlerror()); \
+    } else {                                                            \
+      ALOG("%stm: OK", mangled_name);                                   \
+    }                                                                   \
+  } while(0);
+
+static struct cubeb_ops const audiotrack_ops;
+void audiotrack_destroy(cubeb * context);
+void audiotrack_stream_destroy(cubeb_stream * stream);
+
+struct AudioTrack {
+  /* only available on ICS and later. The second int paramter is in fact of type audio_stream_type_t. */
+  /* static */ status_t (*get_min_frame_count)(int* frame_count, int stream_type, uint32_t rate);
+  /* if we have a recent ctor, but can't find the above symbol, we
+   * can get the minimum frame count with this signature, and we are
+   * running gingerbread. */
+  /* static */ status_t (*get_min_frame_count_gingerbread)(int* frame_count, int stream_type, uint32_t rate);
+  void* (*ctor)(void* instance, int, unsigned int, int, int, int, unsigned int, void (*)(int, void*, void*), void*, int, int);
+  void* (*dtor)(void* instance);
+  void (*start)(void* instance);
+  void (*pause)(void* instance);
+  uint32_t (*latency)(void* instance);
+  status_t (*check)(void* instance);
+  status_t (*get_position)(void* instance, uint32_t* position);
+  /* static */ int (*get_output_samplingrate)(int* samplerate, int stream);
+  status_t (*set_marker_position)(void* instance, unsigned int);
+  status_t (*set_volume)(void* instance, float left, float right);
+};
+
+struct cubeb {
+  struct cubeb_ops const * ops;
+  void * library;
+  struct AudioTrack klass;
+};
+
+struct cubeb_stream {
+  /* Note: Must match cubeb_stream layout in cubeb.c. */
+  cubeb * context;
+  void * user_ptr;
+  /**/
+  cubeb_stream_params params;
+  cubeb_data_callback data_callback;
+  cubeb_state_callback state_callback;
+  void * instance;
+  /* Number of frames that have been passed to the AudioTrack callback */
+  long unsigned written;
+  int draining;
+};
+
+static void
+audiotrack_refill(int event, void* user, void* info)
+{
+  cubeb_stream * stream = user;
+  switch (event) {
+  case EVENT_MORE_DATA: {
+    long got = 0;
+    struct Buffer * b = (struct Buffer*)info;
+
+    if (stream->draining) {
+      return;
+    }
+
+    got = stream->data_callback(stream, stream->user_ptr, NULL, b->raw, b->frameCount);
+
+    stream->written += got;
+
+    if (got != (long)b->frameCount) {
+      stream->draining = 1;
+      /* set a marker so we are notified when the are done draining, that is,
+       * when every frame has been played by android. */
+      stream->context->klass.set_marker_position(stream->instance, stream->written);
+    }
+
+    break;
+  }
+  case EVENT_UNDERRUN:
+    ALOG("underrun in cubeb backend.");
+    break;
+  case EVENT_LOOP_END:
+    assert(0 && "We don't support the loop feature of audiotrack.");
+    break;
+  case EVENT_MARKER:
+    assert(stream->draining);
+    stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_DRAINED);
+    break;
+  case EVENT_NEW_POS:
+    assert(0 && "We don't support the setPositionUpdatePeriod feature of audiotrack.");
+    break;
+  case EVENT_BUFFER_END:
+    assert(0 && "Should not happen.");
+    break;
+  }
+}
+
+/* We are running on gingerbread if we found the gingerbread signature for
+ * getMinFrameCount */
+static int
+audiotrack_version_is_gingerbread(cubeb * ctx)
+{
+  return ctx->klass.get_min_frame_count_gingerbread != NULL;
+}
+
+int
+audiotrack_get_min_frame_count(cubeb * ctx, cubeb_stream_params * params, int * min_frame_count)
+{
+  status_t status;
+  /* Recent Android have a getMinFrameCount method. */
+  if (!audiotrack_version_is_gingerbread(ctx)) {
+    status = ctx->klass.get_min_frame_count(min_frame_count, AUDIO_STREAM_TYPE_MUSIC, params->rate);
+  } else {
+    status = ctx->klass.get_min_frame_count_gingerbread(min_frame_count, AUDIO_STREAM_TYPE_MUSIC, params->rate);
+  }
+  if (status != 0) {
+    ALOG("error getting the min frame count");
+    return CUBEB_ERROR;
+  }
+  return CUBEB_OK;
+}
+
+int
+audiotrack_init(cubeb ** context, char const * context_name)
+{
+  cubeb * ctx;
+  struct AudioTrack* c;
+
+  assert(context);
+  *context = NULL;
+
+  ctx = calloc(1, sizeof(*ctx));
+  assert(ctx);
+
+  /* If we use an absolute path here ("/system/lib/libmedia.so"), and on Android
+   * 2.2, the dlopen succeeds, all the dlsym succeed, but a segfault happens on
+   * the first call to a dlsym'ed function. Somehow this does not happen when
+   * using only the name of the library. */
+  ctx->library = dlopen("libmedia.so", RTLD_LAZY);
+  if (!ctx->library) {
+    ALOG("dlopen error: %s.", dlerror());
+    free(ctx);
+    return CUBEB_ERROR;
+  }
+
+  /* Recent Android first, then Gingerbread. */
+  DLSYM_DLERROR("_ZN7android10AudioTrackC1EijiiijPFviPvS1_ES1_ii", ctx->klass.ctor, ctx->library);
+  DLSYM_DLERROR("_ZN7android10AudioTrackD1Ev", ctx->klass.dtor, ctx->library);
+
+  DLSYM_DLERROR("_ZNK7android10AudioTrack7latencyEv", ctx->klass.latency, ctx->library);
+  DLSYM_DLERROR("_ZNK7android10AudioTrack9initCheckEv", ctx->klass.check, ctx->library);
+
+  DLSYM_DLERROR("_ZN7android11AudioSystem21getOutputSamplingRateEPii", ctx->klass.get_output_samplingrate, ctx->library);
+
+  /* |getMinFrameCount| is available on gingerbread and ICS with different signatures. */
+  DLSYM_DLERROR("_ZN7android10AudioTrack16getMinFrameCountEPi19audio_stream_type_tj", ctx->klass.get_min_frame_count, ctx->library);
+  if (!ctx->klass.get_min_frame_count) {
+    DLSYM_DLERROR("_ZN7android10AudioTrack16getMinFrameCountEPiij", ctx->klass.get_min_frame_count_gingerbread, ctx->library);
+  }
+
+  DLSYM_DLERROR("_ZN7android10AudioTrack5startEv", ctx->klass.start, ctx->library);
+  DLSYM_DLERROR("_ZN7android10AudioTrack5pauseEv", ctx->klass.pause, ctx->library);
+  DLSYM_DLERROR("_ZN7android10AudioTrack11getPositionEPj", ctx->klass.get_position, ctx->library);
+  DLSYM_DLERROR("_ZN7android10AudioTrack17setMarkerPositionEj", ctx->klass.set_marker_position, ctx->library);
+  DLSYM_DLERROR("_ZN7android10AudioTrack9setVolumeEff", ctx->klass.set_volume, ctx->library);
+
+  /* check that we have a combination of symbol that makes sense */
+  c = &ctx->klass;
+  if(!(c->ctor &&
+       c->dtor && c->latency && c->check &&
+       /* at least one way to get the minimum frame count to request. */
+       (c->get_min_frame_count ||
+        c->get_min_frame_count_gingerbread) &&
+       c->start && c->pause && c->get_position && c->set_marker_position)) {
+    ALOG("Could not find all the symbols we need.");
+    audiotrack_destroy(ctx);
+    return CUBEB_ERROR;
+  }
+
+  ctx->ops = &audiotrack_ops;
+
+  *context = ctx;
+
+  return CUBEB_OK;
+}
+
+char const *
+audiotrack_get_backend_id(cubeb * context)
+{
+  return "audiotrack";
+}
+
+static int
+audiotrack_get_max_channel_count(cubeb * ctx, uint32_t * max_channels)
+{
+  assert(ctx && max_channels);
+
+  /* The android mixer handles up to two channels, see
+     http://androidxref.com/4.2.2_r1/xref/frameworks/av/services/audioflinger/AudioFlinger.h#67 */
+  *max_channels = 2;
+
+  return CUBEB_OK;
+}
+
+static int
+audiotrack_get_min_latency(cubeb * ctx, cubeb_stream_params params, uint32_t * latency_ms)
+{
+  /* We always use the lowest latency possible when using this backend (see
+   * audiotrack_stream_init), so this value is not going to be used. */
+  int r;
+
+  r = audiotrack_get_min_frame_count(ctx, &params, (int *)latency_ms);
+  if (r != CUBEB_OK) {
+    return CUBEB_ERROR;
+  }
+
+  return CUBEB_OK;
+}
+
+static int
+audiotrack_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate)
+{
+  status_t r;
+
+  r = ctx->klass.get_output_samplingrate((int32_t *)rate, 3 /* MUSIC */);
+
+  return r == 0 ? CUBEB_OK : CUBEB_ERROR;
+}
+
+void
+audiotrack_destroy(cubeb * context)
+{
+  assert(context);
+
+  dlclose(context->library);
+
+  free(context);
+}
+
+int
+audiotrack_stream_init(cubeb * ctx, cubeb_stream ** stream, char const * stream_name,
+                       cubeb_devid input_device,
+                       cubeb_stream_params * input_stream_params,
+                       cubeb_devid output_device,
+                       cubeb_stream_params * output_stream_params,
+                       unsigned int latency,
+                       cubeb_data_callback data_callback,
+                       cubeb_state_callback state_callback,
+                       void * user_ptr)
+{
+  cubeb_stream * stm;
+  int32_t channels;
+  uint32_t min_frame_count;
+
+  assert(ctx && stream);
+
+  assert(!input_stream_params && "not supported");
+  if (input_device || output_device) {
+    /* Device selection not yet implemented. */
+    return CUBEB_ERROR_DEVICE_UNAVAILABLE;
+  }
+
+  if (output_stream_params->format == CUBEB_SAMPLE_FLOAT32LE ||
+      output_stream_params->format == CUBEB_SAMPLE_FLOAT32BE) {
+    return CUBEB_ERROR_INVALID_FORMAT;
+  }
+
+  if (audiotrack_get_min_frame_count(ctx, output_stream_params, (int *)&min_frame_count)) {
+    return CUBEB_ERROR;
+  }
+
+  stm = calloc(1, sizeof(*stm));
+  assert(stm);
+
+  stm->context = ctx;
+  stm->data_callback = data_callback;
+  stm->state_callback = state_callback;
+  stm->user_ptr = user_ptr;
+  stm->params = *output_stream_params;
+
+  stm->instance = calloc(SIZE_AUDIOTRACK_INSTANCE, 1);
+  (*(uint32_t*)((intptr_t)stm->instance + SIZE_AUDIOTRACK_INSTANCE - 4)) = 0xbaadbaad;
+  assert(stm->instance && "cubeb: EOM");
+
+  /* gingerbread uses old channel layout enum */
+  if (audiotrack_version_is_gingerbread(ctx)) {
+    channels = stm->params.channels == 2 ? AUDIO_CHANNEL_OUT_STEREO_Legacy : AUDIO_CHANNEL_OUT_MONO_Legacy;
+  } else {
+    channels = stm->params.channels == 2 ? AUDIO_CHANNEL_OUT_STEREO_ICS : AUDIO_CHANNEL_OUT_MONO_ICS;
+  }
+
+  ctx->klass.ctor(stm->instance, AUDIO_STREAM_TYPE_MUSIC, stm->params.rate,
+                  AUDIO_FORMAT_PCM_16_BIT, channels, min_frame_count, 0,
+                  audiotrack_refill, stm, 0, 0);
+
+  assert((*(uint32_t*)((intptr_t)stm->instance + SIZE_AUDIOTRACK_INSTANCE - 4)) == 0xbaadbaad);
+
+  if (ctx->klass.check(stm->instance)) {
+    ALOG("stream not initialized properly.");
+    audiotrack_stream_destroy(stm);
+    return CUBEB_ERROR;
+  }
+
+  *stream = stm;
+
+  return CUBEB_OK;
+}
+
+void
+audiotrack_stream_destroy(cubeb_stream * stream)
+{
+  assert(stream->context);
+
+  stream->context->klass.dtor(stream->instance);
+
+  free(stream->instance);
+  stream->instance = NULL;
+  free(stream);
+}
+
+int
+audiotrack_stream_start(cubeb_stream * stream)
+{
+  assert(stream->instance);
+
+  stream->context->klass.start(stream->instance);
+  stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_STARTED);
+
+  return CUBEB_OK;
+}
+
+int
+audiotrack_stream_stop(cubeb_stream * stream)
+{
+  assert(stream->instance);
+
+  stream->context->klass.pause(stream->instance);
+  stream->state_callback(stream, stream->user_ptr, CUBEB_STATE_STOPPED);
+
+  return CUBEB_OK;
+}
+
+int
+audiotrack_stream_get_position(cubeb_stream * stream, uint64_t * position)
+{
+  uint32_t p;
+
+  assert(stream->instance && position);
+  stream->context->klass.get_position(stream->instance, &p);
+  *position = p;
+
+  return CUBEB_OK;
+}
+
+int
+audiotrack_stream_get_latency(cubeb_stream * stream, uint32_t * latency)
+{
+  assert(stream->instance && latency);
+
+  /* Android returns the latency in ms, we want it in frames. */
+  *latency = stream->context->klass.latency(stream->instance);
+  /* with rate <= 96000, we won't overflow until 44.739 seconds of latency */
+  *latency = (*latency * stream->params.rate) / 1000;
+
+  return 0;
+}
+
+int
+audiotrack_stream_set_volume(cubeb_stream * stream, float volume)
+{
+  status_t status;
+
+  status = stream->context->klass.set_volume(stream->instance, volume, volume);
+
+  if (status) {
+    return CUBEB_ERROR;
+  }
+
+  return CUBEB_OK;
+}
+
+static struct cubeb_ops const audiotrack_ops = {
+  .init = audiotrack_init,
+  .get_backend_id = audiotrack_get_backend_id,
+  .get_max_channel_count = audiotrack_get_max_channel_count,
+  .get_min_latency = audiotrack_get_min_latency,
+  .get_preferred_sample_rate = audiotrack_get_preferred_sample_rate,
+  .enumerate_devices = NULL,
+  .device_collection_destroy = NULL,
+  .destroy = audiotrack_destroy,
+  .stream_init = audiotrack_stream_init,
+  .stream_destroy = audiotrack_stream_destroy,
+  .stream_start = audiotrack_stream_start,
+  .stream_stop = audiotrack_stream_stop,
+  .stream_reset_default_device = NULL,
+  .stream_get_position = audiotrack_stream_get_position,
+  .stream_get_latency = audiotrack_stream_get_latency,
+  .stream_set_volume = audiotrack_stream_set_volume,
+  .stream_get_current_device = NULL,
+  .stream_device_destroy = NULL,
+  .stream_register_device_changed_callback = NULL,
+  .register_device_collection_changed = NULL
+};

dep/cubeb/src/cubeb_kai.c

@@ -0,0 +1,369 @@
+/*
+ * Copyright © 2015 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <sys/fmutex.h>
+
+#include <kai.h>
+
+#include "cubeb/cubeb.h"
+#include "cubeb-internal.h"
+
+/* We don't support more than 2 channels in KAI */
+#define MAX_CHANNELS 2
+
+#define NBUFS 2
+#define FRAME_SIZE 2048
+
+struct cubeb_stream_item {
+  cubeb_stream * stream;
+};
+
+static struct cubeb_ops const kai_ops;
+
+struct cubeb {
+  struct cubeb_ops const * ops;
+};
+
+struct cubeb_stream {
+  /* Note: Must match cubeb_stream layout in cubeb.c. */
+  cubeb * context;
+  void * user_ptr;
+  /**/
+  cubeb_stream_params params;
+  cubeb_data_callback data_callback;
+  cubeb_state_callback state_callback;
+
+  HKAI hkai;
+  KAISPEC spec;
+  uint64_t total_frames;
+  float soft_volume;
+  _fmutex mutex;
+  float float_buffer[FRAME_SIZE * MAX_CHANNELS];
+};
+
+static inline long
+frames_to_bytes(long frames, cubeb_stream_params params)
+{
+  return frames * 2 * params.channels; /* 2 bytes per frame */
+}
+
+static inline long
+bytes_to_frames(long bytes, cubeb_stream_params params)
+{
+  return bytes / 2 / params.channels; /* 2 bytes per frame */
+}
+
+static void kai_destroy(cubeb * ctx);
+
+/*static*/ int
+kai_init(cubeb ** context, char const * context_name)
+{
+  cubeb * ctx;
+
+  XASSERT(context);
+  *context = NULL;
+
+  if (kaiInit(KAIM_AUTO))
+    return CUBEB_ERROR;
+
+  ctx = calloc(1, sizeof(*ctx));
+  XASSERT(ctx);
+
+  ctx->ops = &kai_ops;
+
+  *context = ctx;
+
+  return CUBEB_OK;
+}
+
+static char const *
+kai_get_backend_id(cubeb * ctx)
+{
+  return "kai";
+}
+
+static void
+kai_destroy(cubeb * ctx)
+{
+  kaiDone();
+
+  free(ctx);
+}
+
+static void
+float_to_s16ne(int16_t *dst, float *src, size_t n)
+{
+  long l;
+
+  while (n--) {
+    l = lrintf(*src++ * 0x8000);
+    if (l > 32767)
+      l = 32767;
+    if (l < -32768)
+      l = -32768;
+    *dst++ = (int16_t)l;
+  }
+}
+
+static ULONG APIENTRY
+kai_callback(PVOID cbdata, PVOID buffer, ULONG len)
+{
+  cubeb_stream * stm = cbdata;
+  void *p;
+  long wanted_frames;
+  long frames;
+  float soft_volume;
+  int elements = len / sizeof(int16_t);
+
+  p = stm->params.format == CUBEB_SAMPLE_FLOAT32NE
+      ? stm->float_buffer : buffer;
+
+  wanted_frames = bytes_to_frames(len, stm->params);
+  frames = stm->data_callback(stm, stm->user_ptr, NULL, p, wanted_frames);
+
+  _fmutex_request(&stm->mutex, 0);
+  stm->total_frames += frames;
+  soft_volume = stm->soft_volume;
+  _fmutex_release(&stm->mutex);
+
+  if (frames < wanted_frames)
+    stm->state_callback(stm, stm->user_ptr, CUBEB_STATE_DRAINED);
+
+  if (stm->params.format == CUBEB_SAMPLE_FLOAT32NE)
+    float_to_s16ne(buffer, p, elements);
+
+  if (soft_volume != -1.0f) {
+    int16_t *b = buffer;
+    int i;
+
+    for (i = 0; i < elements; i++)
+      *b++ *= soft_volume;
+  }
+
+  return frames_to_bytes(frames, stm->params);
+}
+
+static void kai_stream_destroy(cubeb_stream * stm);
+
+static int
+kai_stream_init(cubeb * context, cubeb_stream ** stream,
+                char const * stream_name,
+                cubeb_devid input_device,
+                cubeb_stream_params * input_stream_params,
+                cubeb_devid output_device,
+                cubeb_stream_params * output_stream_params,
+                unsigned int latency, cubeb_data_callback data_callback,
+                cubeb_state_callback state_callback, void * user_ptr)
+{
+  cubeb_stream * stm;
+  KAISPEC wanted_spec;
+
+  XASSERT(!input_stream_params && "not supported.");
+  if (input_device || output_device) {
+    /* Device selection not yet implemented. */
+    return CUBEB_ERROR_DEVICE_UNAVAILABLE;
+  }
+
+  if (!output_stream_params)
+    return CUBEB_ERROR_INVALID_PARAMETER;
+
+  // Loopback is unsupported
+  if (output_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK) {
+    return CUBEB_ERROR_NOT_SUPPORTED;
+  }
+
+  if (output_stream_params->channels < 1 ||
+      output_stream_params->channels > MAX_CHANNELS)
+    return CUBEB_ERROR_INVALID_FORMAT;
+
+  XASSERT(context);
+  XASSERT(stream);
+
+  *stream = NULL;
+
+  stm = calloc(1, sizeof(*stm));
+  XASSERT(stm);
+
+  stm->context = context;
+  stm->params = *output_stream_params;
+  stm->data_callback = data_callback;
+  stm->state_callback = state_callback;
+  stm->user_ptr = user_ptr;
+  stm->soft_volume = -1.0f;
+
+  if (_fmutex_create(&stm->mutex, 0)) {
+    free(stm);
+    return CUBEB_ERROR;
+  }
+
+  wanted_spec.usDeviceIndex   = 0;
+  wanted_spec.ulType          = KAIT_PLAY;
+  wanted_spec.ulBitsPerSample = BPS_16;
+  wanted_spec.ulSamplingRate  = stm->params.rate;
+  wanted_spec.ulDataFormat    = MCI_WAVE_FORMAT_PCM;
+  wanted_spec.ulChannels      = stm->params.channels;
+  wanted_spec.ulNumBuffers    = NBUFS;
+  wanted_spec.ulBufferSize    = frames_to_bytes(FRAME_SIZE, stm->params);
+  wanted_spec.fShareable      = TRUE;
+  wanted_spec.pfnCallBack     = kai_callback;
+  wanted_spec.pCallBackData   = stm;
+
+  if (kaiOpen(&wanted_spec, &stm->spec, &stm->hkai)) {
+    _fmutex_close(&stm->mutex);
+    free(stm);
+    return CUBEB_ERROR;
+  }
+
+  *stream = stm;
+
+  return CUBEB_OK;
+}
+
+static void
+kai_stream_destroy(cubeb_stream * stm)
+{
+  kaiClose(stm->hkai);
+  _fmutex_close(&stm->mutex);
+  free(stm);
+}
+
+static int
+kai_get_max_channel_count(cubeb * ctx, uint32_t * max_channels)
+{
+  XASSERT(ctx && max_channels);
+
+  *max_channels = MAX_CHANNELS;
+
+  return CUBEB_OK;
+}
+
+static int
+kai_get_min_latency(cubeb * ctx, cubeb_stream_params params, uint32_t * latency)
+{
+  /* We have at least two buffers. One is being played, the other one is being
+     filled. So there is as much latency as one buffer. */
+  *latency = FRAME_SIZE;
+
+  return CUBEB_OK;
+}
+
+static int
+kai_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate)
+{
+  cubeb_stream_params params;
+  KAISPEC wanted_spec;
+  KAISPEC spec;
+  HKAI hkai;
+
+  params.format = CUBEB_SAMPLE_S16NE;
+  params.rate = 48000;
+  params.channels = 2;
+
+  wanted_spec.usDeviceIndex   = 0;
+  wanted_spec.ulType          = KAIT_PLAY;
+  wanted_spec.ulBitsPerSample = BPS_16;
+  wanted_spec.ulSamplingRate  = params.rate;
+  wanted_spec.ulDataFormat    = MCI_WAVE_FORMAT_PCM;
+  wanted_spec.ulChannels      = params.channels;
+  wanted_spec.ulNumBuffers    = NBUFS;
+  wanted_spec.ulBufferSize    = frames_to_bytes(FRAME_SIZE, params);
+  wanted_spec.fShareable      = TRUE;
+  wanted_spec.pfnCallBack     = kai_callback;
+  wanted_spec.pCallBackData   = NULL;
+
+  /* Test 48KHz */
+  if (kaiOpen(&wanted_spec, &spec, &hkai)) {
+    /* Not supported. Fall back to 44.1KHz */
+    params.rate = 44100;
+  } else {
+    /* Supported. Use 48KHz */
+    kaiClose(hkai);
+  }
+
+  *rate = params.rate;
+
+  return CUBEB_OK;
+}
+
+static int
+kai_stream_start(cubeb_stream * stm)
+{
+  if (kaiPlay(stm->hkai))
+    return CUBEB_ERROR;
+
+  stm->state_callback(stm, stm->user_ptr, CUBEB_STATE_STARTED);
+
+  return CUBEB_OK;
+}
+
+static int
+kai_stream_stop(cubeb_stream * stm)
+{
+  if (kaiStop(stm->hkai))
+    return CUBEB_ERROR;
+
+  stm->state_callback(stm, stm->user_ptr, CUBEB_STATE_STOPPED);
+
+  return CUBEB_OK;
+}
+
+static int
+kai_stream_get_position(cubeb_stream * stm, uint64_t * position)
+{
+  _fmutex_request(&stm->mutex, 0);
+  *position = stm->total_frames;
+  _fmutex_release(&stm->mutex);
+
+  return CUBEB_OK;
+}
+
+static int
+kai_stream_get_latency(cubeb_stream * stm, uint32_t * latency)
+{
+  /* Out of buffers, one is being played, the others are being filled.
+     So there is as much latency as total buffers - 1. */
+  *latency = bytes_to_frames(stm->spec.ulBufferSize, stm->params)
+             * (stm->spec.ulNumBuffers - 1);
+
+  return CUBEB_OK;
+}
+
+static int
+kai_stream_set_volume(cubeb_stream * stm, float volume)
+{
+  _fmutex_request(&stm->mutex, 0);
+  stm->soft_volume = volume;
+  _fmutex_release(&stm->mutex);
+
+  return CUBEB_OK;
+}
+
+static struct cubeb_ops const kai_ops = {
+  /*.init =*/ kai_init,
+  /*.get_backend_id =*/ kai_get_backend_id,
+  /*.get_max_channel_count=*/ kai_get_max_channel_count,
+  /*.get_min_latency=*/ kai_get_min_latency,
+  /*.get_preferred_sample_rate =*/ kai_get_preferred_sample_rate,
+  /*.get_preferred_channel_layout =*/ NULL,
+  /*.enumerate_devices =*/ NULL,
+  /*.device_collection_destroy =*/ NULL,
+  /*.destroy =*/ kai_destroy,
+  /*.stream_init =*/ kai_stream_init,
+  /*.stream_destroy =*/ kai_stream_destroy,
+  /*.stream_start =*/ kai_stream_start,
+  /*.stream_stop =*/ kai_stream_stop,
+  /*.stream_reset_default_device =*/ NULL,
+  /*.stream_get_position =*/ kai_stream_get_position,
+  /*.stream_get_latency = */ kai_stream_get_latency,
+  /*.stream_set_volume =*/ kai_stream_set_volume,
+  /*.stream_get_current_device =*/ NULL,
+  /*.stream_device_destroy =*/ NULL,
+  /*.stream_register_device_changed_callback=*/ NULL,
+  /*.register_device_collection_changed=*/ NULL
+};

dep/cubeb/src/cubeb_log.cpp

@@ -0,0 +1,144 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#define NOMINMAX
+
+#include "cubeb_log.h"
+#include "cubeb_ringbuffer.h"
+#include <cstdarg>
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <time.h>
+#endif
+
+cubeb_log_level g_cubeb_log_level;
+cubeb_log_callback g_cubeb_log_callback;
+
+/** The maximum size of a log message, after having been formatted. */
+const size_t CUBEB_LOG_MESSAGE_MAX_SIZE = 256;
+/** The maximum number of log messages that can be queued before dropping
+ * messages. */
+const size_t CUBEB_LOG_MESSAGE_QUEUE_DEPTH = 40;
+/** Number of milliseconds to wait before dequeuing log messages. */
+#define CUBEB_LOG_BATCH_PRINT_INTERVAL_MS 10
+
+/**
+  * This wraps an inline buffer, that represents a log message, that must be
+  * null-terminated.
+  * This class should not use system calls or other potentially blocking code.
+  */
+class cubeb_log_message
+{
+public:
+  cubeb_log_message()
+  {
+    *storage = '\0';
+  }
+  cubeb_log_message(char const str[CUBEB_LOG_MESSAGE_MAX_SIZE])
+  {
+    size_t length = strlen(str);
+    /* paranoia against malformed message */
+    assert(length < CUBEB_LOG_MESSAGE_MAX_SIZE);
+    if (length > CUBEB_LOG_MESSAGE_MAX_SIZE - 1) {
+      return;
+    }
+    PodCopy(storage, str, length);
+    storage[length] = '\0';
+  }
+  char const * get() {
+    return storage;
+  }
+private:
+  char storage[CUBEB_LOG_MESSAGE_MAX_SIZE];
+};
+
+/** Lock-free asynchronous logger, made so that logging from a
+ *  real-time audio callback does not block the audio thread. */
+class cubeb_async_logger
+{
+public:
+  /* This is thread-safe since C++11 */
+  static cubeb_async_logger & get() {
+    static cubeb_async_logger instance;
+    return instance;
+  }
+  void push(char const str[CUBEB_LOG_MESSAGE_MAX_SIZE])
+  {
+    cubeb_log_message msg(str);
+    msg_queue.enqueue(msg);
+  }
+  void run()
+  {
+    std::thread([this]() {
+      while (true) {
+        cubeb_log_message msg;
+        while (msg_queue.dequeue(&msg, 1)) {
+          LOGV("%s", msg.get());
+        }
+#ifdef _WIN32
+        Sleep(CUBEB_LOG_BATCH_PRINT_INTERVAL_MS);
+#else
+        timespec sleep_duration = sleep_for;
+        timespec remainder;
+        do {
+          if (nanosleep(&sleep_duration, &remainder) == 0 ||
+              errno != EINTR) {
+            break;
+          }
+          sleep_duration = remainder;
+        } while (remainder.tv_sec || remainder.tv_nsec);
+#endif
+      }
+    }).detach();
+  }
+  // Tell the underlying queue the producer thread has changed, so it does not
+  // assert in debug. This should be called with the thread stopped.
+  void reset_producer_thread()
+  {
+    msg_queue.reset_thread_ids();
+  }
+private:
+#ifndef _WIN32
+  const struct timespec sleep_for = {
+    CUBEB_LOG_BATCH_PRINT_INTERVAL_MS/1000,
+    (CUBEB_LOG_BATCH_PRINT_INTERVAL_MS%1000)*1000*1000
+  };
+#endif
+  cubeb_async_logger()
+    : msg_queue(CUBEB_LOG_MESSAGE_QUEUE_DEPTH)
+  {
+    run();
+  }
+  /** This is quite a big data structure, but is only instantiated if the
+   * asynchronous logger is used.*/
+  lock_free_queue<cubeb_log_message> msg_queue;
+};
+
+
+void cubeb_async_log(char const * fmt, ...)
+{
+  if (!g_cubeb_log_callback) {
+    return;
+  }
+  // This is going to copy a 256 bytes array around, which is fine.
+  // We don't want to allocate memory here, because this is made to
+  // be called from a real-time callback.
+  va_list args;
+  va_start(args, fmt);
+  char msg[CUBEB_LOG_MESSAGE_MAX_SIZE];
+  vsnprintf(msg, CUBEB_LOG_MESSAGE_MAX_SIZE, fmt, args);
+  cubeb_async_logger::get().push(msg);
+  va_end(args);
+}
+
+void cubeb_async_log_reset_threads()
+{
+  if (!g_cubeb_log_callback) {
+    return;
+  }
+  cubeb_async_logger::get().reset_producer_thread();
+}

dep/cubeb/src/cubeb_log.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef CUBEB_LOG
+#define CUBEB_LOG
+
+#include "cubeb/cubeb.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define PRINTF_FORMAT(fmt, args) __attribute__((format(printf, fmt, args)))
+#else
+#define PRINTF_FORMAT(fmt, args)
+#endif
+
+extern cubeb_log_level g_cubeb_log_level;
+extern cubeb_log_callback g_cubeb_log_callback PRINTF_FORMAT(1, 2);
+void cubeb_async_log(const char * fmt, ...);
+void cubeb_async_log_reset_threads();
+
+#ifdef __cplusplus
+}
+#endif
+
+#define LOGV(msg, ...) LOG_INTERNAL(CUBEB_LOG_VERBOSE, msg, ##__VA_ARGS__)
+#define LOG(msg, ...) LOG_INTERNAL(CUBEB_LOG_NORMAL, msg, ##__VA_ARGS__)
+
+#define LOG_INTERNAL(level, fmt, ...) do {                                   \
+    if (g_cubeb_log_callback && level <= g_cubeb_log_level) {                            \
+      g_cubeb_log_callback("%s:%d: " fmt "\n", __FILE__, __LINE__, ##__VA_ARGS__); \
+    }                                                                        \
+  } while(0)
+
+/* Asynchronous verbose logging, to log in real-time callbacks. */
+#define ALOGV(fmt, ...)                   \
+do {                                      \
+  cubeb_async_log(fmt, ##__VA_ARGS__);    \
+} while(0)
+
+#endif // CUBEB_LOG

dep/cubeb/src/cubeb_mixer.cpp

@@ -0,0 +1,663 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ *
+ * Adapted from code based on libswresample's rematrix.c
+ */
+
+#define NOMINMAX
+
+#include <algorithm>
+#include <cassert>
+#include <climits>
+#include <cmath>
+#include <cstdlib>
+#include <memory>
+#include <type_traits>
+#include "cubeb-internal.h"
+#include "cubeb_mixer.h"
+#include "cubeb_utils.h"
+
+#ifndef FF_ARRAY_ELEMS
+#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
+#endif
+
+#define CHANNELS_MAX 32
+#define FRONT_LEFT             0
+#define FRONT_RIGHT            1
+#define FRONT_CENTER           2
+#define LOW_FREQUENCY          3
+#define BACK_LEFT              4
+#define BACK_RIGHT             5
+#define FRONT_LEFT_OF_CENTER   6
+#define FRONT_RIGHT_OF_CENTER  7
+#define BACK_CENTER            8
+#define SIDE_LEFT              9
+#define SIDE_RIGHT             10
+#define TOP_CENTER             11
+#define TOP_FRONT_LEFT         12
+#define TOP_FRONT_CENTER       13
+#define TOP_FRONT_RIGHT        14
+#define TOP_BACK_LEFT          15
+#define TOP_BACK_CENTER        16
+#define TOP_BACK_RIGHT         17
+#define NUM_NAMED_CHANNELS     18
+
+#ifndef M_SQRT1_2
+#define M_SQRT1_2      0.70710678118654752440  /* 1/sqrt(2) */
+#endif
+#ifndef M_SQRT2
+#define M_SQRT2        1.41421356237309504880  /* sqrt(2) */
+#endif
+#define SQRT3_2      1.22474487139158904909  /* sqrt(3/2) */
+
+#define  C30DB  M_SQRT2
+#define  C15DB  1.189207115
+#define C__0DB  1.0
+#define C_15DB  0.840896415
+#define C_30DB  M_SQRT1_2
+#define C_45DB  0.594603558
+#define C_60DB  0.5
+
+static cubeb_channel_layout
+cubeb_channel_layout_check(cubeb_channel_layout l, uint32_t c)
+{
+    if (l == CUBEB_LAYOUT_UNDEFINED) {
+      switch (c) {
+        case 1: return CUBEB_LAYOUT_MONO;
+        case 2: return CUBEB_LAYOUT_STEREO;
+      }
+    }
+    return l;
+}
+
+unsigned int cubeb_channel_layout_nb_channels(cubeb_channel_layout x)
+{
+#if __GNUC__ || __clang__
+  return __builtin_popcount (x);
+#else
+  x -= (x >> 1) & 0x55555555;
+  x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
+  x = (x + (x >> 4)) & 0x0F0F0F0F;
+  x += x >> 8;
+  return (x + (x >> 16)) & 0x3F;
+#endif
+}
+
+struct MixerContext {
+  MixerContext(cubeb_sample_format f,
+               uint32_t in_channels,
+               cubeb_channel_layout in,
+               uint32_t out_channels,
+               cubeb_channel_layout out)
+    : _format(f)
+    , _in_ch_layout(cubeb_channel_layout_check(in, in_channels))
+    , _out_ch_layout(cubeb_channel_layout_check(out, out_channels))
+    , _in_ch_count(in_channels)
+    , _out_ch_count(out_channels)
+  {
+    if (in_channels != cubeb_channel_layout_nb_channels(in) ||
+        out_channels != cubeb_channel_layout_nb_channels(out)) {
+      // Mismatch between channels and layout, aborting.
+      return;
+    }
+    _valid = init() >= 0;
+  }
+
+  static bool even(cubeb_channel_layout layout)
+  {
+    if (!layout) {
+      return true;
+    }
+    if (layout & (layout - 1)) {
+      return true;
+    }
+    return false;
+  }
+
+  // Ensure that the layout is sane (that is have symmetrical left/right
+  // channels), if not, layout will be treated as mono.
+  static cubeb_channel_layout clean_layout(cubeb_channel_layout layout)
+  {
+    if (layout && layout != CHANNEL_FRONT_LEFT && !(layout & (layout - 1))) {
+      LOG("Treating layout as mono");
+      return CHANNEL_FRONT_CENTER;
+    }
+
+    return layout;
+  }
+
+  static bool sane_layout(cubeb_channel_layout layout)
+  {
+    if (!(layout & CUBEB_LAYOUT_3F)) { // at least 1 front speaker
+      return false;
+    }
+    if (!even(layout & (CHANNEL_FRONT_LEFT |
+                        CHANNEL_FRONT_RIGHT))) { // no asymetric front
+      return false;
+    }
+    if (!even(layout &
+              (CHANNEL_SIDE_LEFT | CHANNEL_SIDE_RIGHT))) { // no asymetric side
+      return false;
+    }
+    if (!even(layout & (CHANNEL_BACK_LEFT | CHANNEL_BACK_RIGHT))) {
+      return false;
+    }
+    if (!even(layout &
+              (CHANNEL_FRONT_LEFT_OF_CENTER | CHANNEL_FRONT_RIGHT_OF_CENTER))) {
+      return false;
+    }
+    if (cubeb_channel_layout_nb_channels(layout) >= CHANNELS_MAX) {
+      return false;
+    }
+    return true;
+  }
+
+  int auto_matrix();
+  int init();
+
+  const cubeb_sample_format _format;
+  const cubeb_channel_layout _in_ch_layout;              ///< input channel layout
+  const cubeb_channel_layout _out_ch_layout;             ///< output channel layout
+  const uint32_t _in_ch_count;                           ///< input channel count
+  const uint32_t _out_ch_count;                          ///< output channel count
+  const float _surround_mix_level = C_30DB;              ///< surround mixing level
+  const float _center_mix_level = C_30DB;                ///< center mixing level
+  const float _lfe_mix_level = 1;                        ///< LFE mixing level
+  double _matrix[CHANNELS_MAX][CHANNELS_MAX] = {{ 0 }};        ///< floating point rematrixing coefficients
+  float _matrix_flt[CHANNELS_MAX][CHANNELS_MAX] = {{ 0 }};     ///< single precision floating point rematrixing coefficients
+  int32_t _matrix32[CHANNELS_MAX][CHANNELS_MAX] = {{ 0 }};     ///< 17.15 fixed point rematrixing coefficients
+  uint8_t _matrix_ch[CHANNELS_MAX][CHANNELS_MAX+1] = {{ 0 }};  ///< Lists of input channels per output channel that have non zero rematrixing coefficients
+  bool _clipping = false;                          ///< Set to true if clipping detection is required
+  bool _valid = false;                             ///< Set to true if context is valid.
+};
+
+int MixerContext::auto_matrix()
+{
+  double matrix[NUM_NAMED_CHANNELS][NUM_NAMED_CHANNELS] = { { 0 } };
+  double maxcoef = 0;
+  float maxval;
+
+  cubeb_channel_layout in_ch_layout = clean_layout(_in_ch_layout);
+  cubeb_channel_layout out_ch_layout = clean_layout(_out_ch_layout);
+
+  if (!sane_layout(in_ch_layout)) {
+    // Channel Not Supported
+    LOG("Input Layout %x is not supported", _in_ch_layout);
+    return -1;
+  }
+
+  if (!sane_layout(out_ch_layout)) {
+    LOG("Output Layout %x is not supported", _out_ch_layout);
+    return -1;
+  }
+
+  for (uint32_t i = 0; i < FF_ARRAY_ELEMS(matrix); i++) {
+    if (in_ch_layout & out_ch_layout & (1U << i)) {
+      matrix[i][i] = 1.0;
+    }
+  }
+
+  cubeb_channel_layout unaccounted = in_ch_layout & ~out_ch_layout;
+
+  // Rematrixing is done via a matrix of coefficient that should be applied to
+  // all channels. Channels are treated as pair and must be symmetrical (if a
+  // left channel exists, the corresponding right should exist too) unless the
+  // output layout has similar layout. Channels are then mixed toward the front
+  // center or back center if they exist with a slight bias toward the front.
+
+  if (unaccounted & CHANNEL_FRONT_CENTER) {
+    if ((out_ch_layout & CUBEB_LAYOUT_STEREO) == CUBEB_LAYOUT_STEREO) {
+      if (in_ch_layout & CUBEB_LAYOUT_STEREO) {
+        matrix[FRONT_LEFT][FRONT_CENTER] += _center_mix_level;
+        matrix[FRONT_RIGHT][FRONT_CENTER] += _center_mix_level;
+      } else {
+        matrix[FRONT_LEFT][FRONT_CENTER] += M_SQRT1_2;
+        matrix[FRONT_RIGHT][FRONT_CENTER] += M_SQRT1_2;
+      }
+    }
+  }
+  if (unaccounted & CUBEB_LAYOUT_STEREO) {
+    if (out_ch_layout & CHANNEL_FRONT_CENTER) {
+      matrix[FRONT_CENTER][FRONT_LEFT] += M_SQRT1_2;
+      matrix[FRONT_CENTER][FRONT_RIGHT] += M_SQRT1_2;
+      if (in_ch_layout & CHANNEL_FRONT_CENTER)
+        matrix[FRONT_CENTER][FRONT_CENTER] = _center_mix_level * M_SQRT2;
+    }
+  }
+
+  if (unaccounted & CHANNEL_BACK_CENTER) {
+    if (out_ch_layout & CHANNEL_BACK_LEFT) {
+      matrix[BACK_LEFT][BACK_CENTER] += M_SQRT1_2;
+      matrix[BACK_RIGHT][BACK_CENTER] += M_SQRT1_2;
+    } else if (out_ch_layout & CHANNEL_SIDE_LEFT) {
+      matrix[SIDE_LEFT][BACK_CENTER] += M_SQRT1_2;
+      matrix[SIDE_RIGHT][BACK_CENTER] += M_SQRT1_2;
+    } else if (out_ch_layout & CHANNEL_FRONT_LEFT) {
+      matrix[FRONT_LEFT][BACK_CENTER] += _surround_mix_level * M_SQRT1_2;
+      matrix[FRONT_RIGHT][BACK_CENTER] += _surround_mix_level * M_SQRT1_2;
+    } else if (out_ch_layout & CHANNEL_FRONT_CENTER) {
+      matrix[FRONT_CENTER][BACK_CENTER] +=
+        _surround_mix_level * M_SQRT1_2;
+    }
+  }
+  if (unaccounted & CHANNEL_BACK_LEFT) {
+    if (out_ch_layout & CHANNEL_BACK_CENTER) {
+      matrix[BACK_CENTER][BACK_LEFT] += M_SQRT1_2;
+      matrix[BACK_CENTER][BACK_RIGHT] += M_SQRT1_2;
+    } else if (out_ch_layout & CHANNEL_SIDE_LEFT) {
+      if (in_ch_layout & CHANNEL_SIDE_LEFT) {
+        matrix[SIDE_LEFT][BACK_LEFT] += M_SQRT1_2;
+        matrix[SIDE_RIGHT][BACK_RIGHT] += M_SQRT1_2;
+      } else {
+        matrix[SIDE_LEFT][BACK_LEFT] += 1.0;
+        matrix[SIDE_RIGHT][BACK_RIGHT] += 1.0;
+      }
+    } else if (out_ch_layout & CHANNEL_FRONT_LEFT) {
+      matrix[FRONT_LEFT][BACK_LEFT] += _surround_mix_level;
+      matrix[FRONT_RIGHT][BACK_RIGHT] += _surround_mix_level;
+    } else if (out_ch_layout & CHANNEL_FRONT_CENTER) {
+      matrix[FRONT_CENTER][BACK_LEFT] += _surround_mix_level * M_SQRT1_2;
+      matrix[FRONT_CENTER][BACK_RIGHT] += _surround_mix_level * M_SQRT1_2;
+    }
+  }
+
+  if (unaccounted & CHANNEL_SIDE_LEFT) {
+    if (out_ch_layout & CHANNEL_BACK_LEFT) {
+      /* if back channels do not exist in the input, just copy side
+         channels to back channels, otherwise mix side into back */
+      if (in_ch_layout & CHANNEL_BACK_LEFT) {
+        matrix[BACK_LEFT][SIDE_LEFT] += M_SQRT1_2;
+        matrix[BACK_RIGHT][SIDE_RIGHT] += M_SQRT1_2;
+      } else {
+        matrix[BACK_LEFT][SIDE_LEFT] += 1.0;
+        matrix[BACK_RIGHT][SIDE_RIGHT] += 1.0;
+      }
+    } else if (out_ch_layout & CHANNEL_BACK_CENTER) {
+      matrix[BACK_CENTER][SIDE_LEFT] += M_SQRT1_2;
+      matrix[BACK_CENTER][SIDE_RIGHT] += M_SQRT1_2;
+    } else if (out_ch_layout & CHANNEL_FRONT_LEFT) {
+      matrix[FRONT_LEFT][SIDE_LEFT] += _surround_mix_level;
+      matrix[FRONT_RIGHT][SIDE_RIGHT] += _surround_mix_level;
+    } else if (out_ch_layout & CHANNEL_FRONT_CENTER) {
+      matrix[FRONT_CENTER][SIDE_LEFT] += _surround_mix_level * M_SQRT1_2;
+      matrix[FRONT_CENTER][SIDE_RIGHT] += _surround_mix_level * M_SQRT1_2;
+    }
+  }
+
+  if (unaccounted & CHANNEL_FRONT_LEFT_OF_CENTER) {
+    if (out_ch_layout & CHANNEL_FRONT_LEFT) {
+      matrix[FRONT_LEFT][FRONT_LEFT_OF_CENTER] += 1.0;
+      matrix[FRONT_RIGHT][FRONT_RIGHT_OF_CENTER] += 1.0;
+    } else if (out_ch_layout & CHANNEL_FRONT_CENTER) {
+      matrix[FRONT_CENTER][FRONT_LEFT_OF_CENTER] += M_SQRT1_2;
+      matrix[FRONT_CENTER][FRONT_RIGHT_OF_CENTER] += M_SQRT1_2;
+    }
+  }
+  /* mix LFE into front left/right or center */
+  if (unaccounted & CHANNEL_LOW_FREQUENCY) {
+    if (out_ch_layout & CHANNEL_FRONT_CENTER) {
+      matrix[FRONT_CENTER][LOW_FREQUENCY] += _lfe_mix_level;
+    } else if (out_ch_layout & CHANNEL_FRONT_LEFT) {
+      matrix[FRONT_LEFT][LOW_FREQUENCY] += _lfe_mix_level * M_SQRT1_2;
+      matrix[FRONT_RIGHT][LOW_FREQUENCY] += _lfe_mix_level * M_SQRT1_2;
+    }
+  }
+
+  // Normalize the conversion matrix.
+  for (uint32_t out_i = 0, i = 0; i < CHANNELS_MAX; i++) {
+    double sum = 0;
+    int in_i = 0;
+    if ((out_ch_layout & (1U << i)) == 0) {
+      continue;
+    }
+    for (uint32_t j = 0; j < CHANNELS_MAX; j++) {
+      if ((in_ch_layout & (1U << j)) == 0) {
+        continue;
+      }
+      if (i < FF_ARRAY_ELEMS(matrix) && j < FF_ARRAY_ELEMS(matrix[0])) {
+        _matrix[out_i][in_i] = matrix[i][j];
+      } else {
+        _matrix[out_i][in_i] =
+          i == j && (in_ch_layout & out_ch_layout & (1U << i));
+      }
+      sum += fabs(_matrix[out_i][in_i]);
+      in_i++;
+    }
+    maxcoef = std::max(maxcoef, sum);
+    out_i++;
+  }
+
+  if (_format == CUBEB_SAMPLE_S16NE) {
+    maxval = 1.0;
+  } else {
+    maxval = INT_MAX;
+  }
+
+  // Normalize matrix if needed.
+  if (maxcoef > maxval) {
+    maxcoef /= maxval;
+    for (uint32_t i = 0; i < CHANNELS_MAX; i++)
+      for (uint32_t j = 0; j < CHANNELS_MAX; j++) {
+        _matrix[i][j] /= maxcoef;
+      }
+  }
+
+  if (_format == CUBEB_SAMPLE_FLOAT32NE) {
+    for (uint32_t i = 0; i < FF_ARRAY_ELEMS(_matrix); i++) {
+      for (uint32_t j = 0; j < FF_ARRAY_ELEMS(_matrix[0]); j++) {
+        _matrix_flt[i][j] = _matrix[i][j];
+      }
+    }
+  }
+
+  return 0;
+}
+
+int MixerContext::init()
+{
+  int r = auto_matrix();
+  if (r) {
+    return r;
+  }
+
+  // Determine if matrix operation would overflow
+  if (_format == CUBEB_SAMPLE_S16NE) {
+    int maxsum = 0;
+    for (uint32_t i = 0; i < _out_ch_count; i++) {
+      double rem = 0;
+      int sum = 0;
+
+      for (uint32_t j = 0; j < _in_ch_count; j++) {
+        double target = _matrix[i][j] * 32768 + rem;
+        int value = lrintf(target);
+        rem += target - value;
+        sum += std::abs(value);
+      }
+      maxsum = std::max(maxsum, sum);
+    }
+    if (maxsum > 32768) {
+      _clipping = true;
+    }
+  }
+
+  // FIXME quantize for integers
+  for (uint32_t i = 0; i < CHANNELS_MAX; i++) {
+    int ch_in = 0;
+    for (uint32_t j = 0; j < CHANNELS_MAX; j++) {
+      _matrix32[i][j] = lrintf(_matrix[i][j] * 32768);
+      if (_matrix[i][j]) {
+        _matrix_ch[i][++ch_in] = j;
+      }
+    }
+    _matrix_ch[i][0] = ch_in;
+  }
+
+  return 0;
+}
+
+template<typename TYPE_SAMPLE, typename TYPE_COEFF, typename F>
+void
+sum2(TYPE_SAMPLE * out,
+     uint32_t stride_out,
+     const TYPE_SAMPLE * in1,
+     const TYPE_SAMPLE * in2,
+     uint32_t stride_in,
+     TYPE_COEFF coeff1,
+     TYPE_COEFF coeff2,
+     F&& operand,
+     uint32_t frames)
+{
+  static_assert(
+    std::is_same<TYPE_COEFF,
+                 typename std::result_of<F(TYPE_COEFF)>::type>::value,
+    "function must return the same type as used by matrix_coeff");
+  for (uint32_t i = 0; i < frames; i++) {
+    *out = operand(coeff1 * *in1 + coeff2 * *in2);
+    out += stride_out;
+    in1 += stride_in;
+    in2 += stride_in;
+  }
+}
+
+template<typename TYPE_SAMPLE, typename TYPE_COEFF, typename F>
+void
+copy(TYPE_SAMPLE * out,
+     uint32_t stride_out,
+     const TYPE_SAMPLE * in,
+     uint32_t stride_in,
+     TYPE_COEFF coeff,
+     F&& operand,
+     uint32_t frames)
+{
+  static_assert(
+    std::is_same<TYPE_COEFF,
+                 typename std::result_of<F(TYPE_COEFF)>::type>::value,
+    "function must return the same type as used by matrix_coeff");
+  for (uint32_t i = 0; i < frames; i++) {
+    *out = operand(coeff * *in);
+    out += stride_out;
+    in += stride_in;
+  }
+}
+
+template <typename TYPE, typename TYPE_COEFF, size_t COLS, typename F>
+static int rematrix(const MixerContext * s, TYPE * aOut, const TYPE * aIn,
+                    const TYPE_COEFF (&matrix_coeff)[COLS][COLS],
+                    F&& aF, uint32_t frames)
+{
+  static_assert(
+    std::is_same<TYPE_COEFF,
+                 typename std::result_of<F(TYPE_COEFF)>::type>::value,
+    "function must return the same type as used by matrix_coeff");
+
+  for (uint32_t out_i = 0; out_i < s->_out_ch_count; out_i++) {
+    TYPE* out = aOut + out_i;
+    switch (s->_matrix_ch[out_i][0]) {
+      case 0:
+        for (uint32_t i = 0; i < frames; i++) {
+          out[i * s->_out_ch_count] = 0;
+        }
+        break;
+      case 1: {
+        int in_i = s->_matrix_ch[out_i][1];
+        copy(out,
+             s->_out_ch_count,
+             aIn + in_i,
+             s->_in_ch_count,
+             matrix_coeff[out_i][in_i],
+             aF,
+             frames);
+      } break;
+      case 2:
+        sum2(out,
+             s->_out_ch_count,
+             aIn + s->_matrix_ch[out_i][1],
+             aIn + s->_matrix_ch[out_i][2],
+             s->_in_ch_count,
+             matrix_coeff[out_i][s->_matrix_ch[out_i][1]],
+             matrix_coeff[out_i][s->_matrix_ch[out_i][2]],
+             aF,
+             frames);
+        break;
+      default:
+        for (uint32_t i = 0; i < frames; i++) {
+          TYPE_COEFF v = 0;
+          for (uint32_t j = 0; j < s->_matrix_ch[out_i][0]; j++) {
+            uint32_t in_i = s->_matrix_ch[out_i][1 + j];
+            v +=
+              *(aIn + in_i + i * s->_in_ch_count) * matrix_coeff[out_i][in_i];
+          }
+          out[i * s->_out_ch_count] = aF(v);
+        }
+        break;
+    }
+  }
+  return 0;
+}
+
+struct cubeb_mixer
+{
+  cubeb_mixer(cubeb_sample_format format,
+              uint32_t in_channels,
+              cubeb_channel_layout in_layout,
+              uint32_t out_channels,
+              cubeb_channel_layout out_layout)
+    : _context(format, in_channels, in_layout, out_channels, out_layout)
+  {
+  }
+
+  template<typename T>
+  void copy_and_trunc(size_t frames,
+                      const T * input_buffer,
+                      T * output_buffer) const
+  {
+    if (_context._in_ch_count <= _context._out_ch_count) {
+      // Not enough channels to copy, fill the gaps with silence.
+      if (_context._in_ch_count == 1 && _context._out_ch_count >= 2) {
+        // Special case for upmixing mono input to stereo and more. We will
+        // duplicate the mono channel to the first two channels. On most system,
+        // the first two channels are for left and right. It is commonly
+        // expected that mono will on both left+right channels
+        for (uint32_t i = 0; i < frames; i++) {
+          output_buffer[0] = output_buffer[1] = *input_buffer;
+          PodZero(output_buffer + 2, _context._out_ch_count - 2);
+          output_buffer += _context._out_ch_count;
+          input_buffer++;
+        }
+        return;
+      }
+      for (uint32_t i = 0; i < frames; i++) {
+        PodCopy(output_buffer, input_buffer, _context._in_ch_count);
+        output_buffer += _context._in_ch_count;
+        input_buffer += _context._in_ch_count;
+        PodZero(output_buffer, _context._out_ch_count - _context._in_ch_count);
+        output_buffer += _context._out_ch_count - _context._in_ch_count;
+      }
+    } else {
+      for (uint32_t i = 0; i < frames; i++) {
+        PodCopy(output_buffer, input_buffer, _context._out_ch_count);
+        output_buffer += _context._out_ch_count;
+        input_buffer += _context._in_ch_count;
+      }
+    }
+  }
+
+  int mix(size_t frames,
+          const void * input_buffer,
+          size_t input_buffer_size,
+          void * output_buffer,
+          size_t output_buffer_size) const
+  {
+    if (frames <= 0 || _context._out_ch_count == 0) {
+      return 0;
+    }
+
+    // Check if output buffer is of sufficient size.
+    size_t size_read_needed =
+      frames * _context._in_ch_count * cubeb_sample_size(_context._format);
+    if (input_buffer_size < size_read_needed) {
+      // We don't have enough data to read!
+      return -1;
+    }
+    if (output_buffer_size * _context._in_ch_count <
+        size_read_needed * _context._out_ch_count) {
+      return -1;
+    }
+
+    if (!valid()) {
+      // The channel layouts were invalid or unsupported, instead we will simply
+      // either drop the extra channels, or fill with silence the missing ones
+      if (_context._format == CUBEB_SAMPLE_FLOAT32NE) {
+        copy_and_trunc(frames,
+                       static_cast<const float*>(input_buffer),
+                       static_cast<float*>(output_buffer));
+      } else {
+        assert(_context._format == CUBEB_SAMPLE_S16NE);
+        copy_and_trunc(frames,
+                       static_cast<const int16_t*>(input_buffer),
+                       reinterpret_cast<int16_t*>(output_buffer));
+      }
+      return 0;
+    }
+
+    switch (_context._format)
+    {
+      case CUBEB_SAMPLE_FLOAT32NE: {
+        auto f = [](float x) { return x; };
+        return rematrix(&_context,
+                        static_cast<float*>(output_buffer),
+                        static_cast<const float*>(input_buffer),
+                        _context._matrix_flt,
+                        f,
+                        frames);
+      }
+      case CUBEB_SAMPLE_S16NE:
+        if (_context._clipping) {
+          auto f = [](int x) {
+            int y = (x + 16384) >> 15;
+            // clip the signed integer value into the -32768,32767 range.
+            if ((y + 0x8000U) & ~0xFFFF) {
+              return (y >> 31) ^ 0x7FFF;
+            }
+            return y;
+          };
+          return rematrix(&_context,
+                          static_cast<int16_t*>(output_buffer),
+                          static_cast<const int16_t*>(input_buffer),
+                          _context._matrix32,
+                          f,
+                          frames);
+        } else {
+          auto f = [](int x) { return (x + 16384) >> 15; };
+          return rematrix(&_context,
+                          static_cast<int16_t*>(output_buffer),
+                          static_cast<const int16_t*>(input_buffer),
+                          _context._matrix32,
+                          f,
+                          frames);
+        }
+        break;
+      default:
+        assert(false);
+        break;
+    }
+
+    return -1;
+  }
+
+  // Return false if any of the input or ouput layout were invalid.
+  bool valid() const { return _context._valid; }
+
+  virtual ~cubeb_mixer(){};
+
+  MixerContext _context;
+};
+
+cubeb_mixer* cubeb_mixer_create(cubeb_sample_format format,
+                                uint32_t in_channels,
+                                cubeb_channel_layout in_layout,
+                                uint32_t out_channels,
+                                cubeb_channel_layout out_layout)
+{
+  return new cubeb_mixer(
+    format, in_channels, in_layout, out_channels, out_layout);
+}
+
+void cubeb_mixer_destroy(cubeb_mixer * mixer)
+{
+  delete mixer;
+}
+
+int cubeb_mixer_mix(cubeb_mixer * mixer,
+                    size_t frames,
+                    const void * input_buffer,
+                    size_t input_buffer_size,
+                    void * output_buffer,
+                    size_t output_buffer_size)
+{
+  return mixer->mix(
+    frames, input_buffer, input_buffer_size, output_buffer, output_buffer_size);
+}

dep/cubeb/src/cubeb_mixer.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef CUBEB_MIXER
+#define CUBEB_MIXER
+
+#include "cubeb/cubeb.h" // for cubeb_channel_layout and cubeb_stream_params.
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+typedef struct cubeb_mixer cubeb_mixer;
+cubeb_mixer * cubeb_mixer_create(cubeb_sample_format format,
+                                 uint32_t in_channels,
+                                 cubeb_channel_layout in_layout,
+                                 uint32_t out_channels,
+                                 cubeb_channel_layout out_layout);
+void cubeb_mixer_destroy(cubeb_mixer * mixer);
+int cubeb_mixer_mix(cubeb_mixer * mixer,
+                    size_t frames,
+                    const void * input_buffer,
+                    size_t input_buffer_size,
+                    void * output_buffer,
+                    size_t output_buffer_size);
+
+unsigned int cubeb_channel_layout_nb_channels(cubeb_channel_layout channel_layout);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif // CUBEB_MIXER

dep/cubeb/src/cubeb_osx_run_loop.cpp

@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#include <cubeb/cubeb.h>
+#include "cubeb_osx_run_loop.h"
+#include "cubeb_log.h"
+#include <AudioUnit/AudioUnit.h>
+#include <CoreAudio/AudioHardware.h>
+#include <CoreAudio/HostTime.h>
+#include <CoreFoundation/CoreFoundation.h>
+
+void cubeb_set_coreaudio_notification_runloop()
+{
+  /* This is needed so that AudioUnit listeners get called on this thread, and
+   * not the main thread. If we don't do that, they are not called, or a crash
+   * occur, depending on the OSX version. */
+  AudioObjectPropertyAddress runloop_address = {
+    kAudioHardwarePropertyRunLoop,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMaster
+  };
+
+  CFRunLoopRef run_loop = nullptr;
+
+  OSStatus r;
+  r = AudioObjectSetPropertyData(kAudioObjectSystemObject,
+                                 &runloop_address,
+                                 0, NULL, sizeof(CFRunLoopRef), &run_loop);
+  if (r != noErr) {
+    LOG("Could not make global CoreAudio notifications use their own thread.");
+  }
+}

dep/cubeb/src/cubeb_osx_run_loop.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright © 2014 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+/* On OSX 10.6 and after, the notification callbacks from the audio hardware are
+ * called on the main thread. Setting the kAudioHardwarePropertyRunLoop property
+ * to null tells the OSX to use a separate thread for that.
+ *
+ * This has to be called only once per process, so it is in a separate header
+ * for easy integration in other code bases.  */
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+void cubeb_set_coreaudio_notification_runloop();
+
+#if defined(__cplusplus)
+}
+#endif

dep/cubeb/src/cubeb_resampler.cpp

@@ -0,0 +1,372 @@
+/*
+ * Copyright © 2014 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif // NOMINMAX
+
+#include <algorithm>
+#include <cmath>
+#include <cassert>
+#include <cstring>
+#include <cstddef>
+#include <cstdio>
+#include "cubeb_resampler.h"
+#include "cubeb-speex-resampler.h"
+#include "cubeb_resampler_internal.h"
+#include "cubeb_utils.h"
+
+int
+to_speex_quality(cubeb_resampler_quality q)
+{
+  switch(q) {
+  case CUBEB_RESAMPLER_QUALITY_VOIP:
+    return SPEEX_RESAMPLER_QUALITY_VOIP;
+  case CUBEB_RESAMPLER_QUALITY_DEFAULT:
+    return SPEEX_RESAMPLER_QUALITY_DEFAULT;
+  case CUBEB_RESAMPLER_QUALITY_DESKTOP:
+    return SPEEX_RESAMPLER_QUALITY_DESKTOP;
+  default:
+    assert(false);
+    return 0XFFFFFFFF;
+  }
+}
+
+uint32_t min_buffered_audio_frame(uint32_t sample_rate)
+{
+  return sample_rate / 20;
+}
+
+template<typename T>
+passthrough_resampler<T>::passthrough_resampler(cubeb_stream * s,
+                                                cubeb_data_callback cb,
+                                                void * ptr,
+                                                uint32_t input_channels,
+                                                uint32_t sample_rate)
+  : processor(input_channels)
+  , stream(s)
+  , data_callback(cb)
+  , user_ptr(ptr)
+  , sample_rate(sample_rate)
+{
+}
+
+template<typename T>
+long passthrough_resampler<T>::fill(void * input_buffer, long * input_frames_count,
+                                    void * output_buffer, long output_frames)
+{
+  if (input_buffer) {
+    assert(input_frames_count);
+  }
+  assert((input_buffer && output_buffer &&
+         *input_frames_count + static_cast<int>(samples_to_frames(internal_input_buffer.length())) >= output_frames) ||
+         (output_buffer && !input_buffer && (!input_frames_count || *input_frames_count == 0)) ||
+         (input_buffer && !output_buffer && output_frames == 0));
+
+  // When we have no pending input data and exactly as much input
+  // as output data, we don't need to copy it into the internal buffer
+  // and can directly forward it to the callback.
+  void * in_buf = input_buffer;
+  unsigned long pop_input_count = 0u;
+  if (input_buffer && !output_buffer) {
+      output_frames = *input_frames_count;
+  } else if(input_buffer) {
+    if (internal_input_buffer.length() != 0) {
+      // In this case we have pending input data left and have
+      // to first append the input so we can pass it as one pointer
+      // to the callback
+      internal_input_buffer.push(static_cast<T*>(input_buffer),
+                                 frames_to_samples(*input_frames_count));
+      in_buf = internal_input_buffer.data();
+      pop_input_count = frames_to_samples(output_frames);
+    } else if(*input_frames_count > output_frames) {
+      // In this case we have more input that we need output and
+      // fill the overflowing input into internal_input_buffer
+      // Since we have no other pending data, we can nonetheless
+      // pass the current input data directly to the callback
+      assert(pop_input_count == 0);
+      unsigned long samples_off = frames_to_samples(output_frames);
+      internal_input_buffer.push(static_cast<T*>(input_buffer) + samples_off,
+                                 frames_to_samples(*input_frames_count - output_frames));
+    }
+  }
+
+  long rv = data_callback(stream, user_ptr, in_buf, output_buffer, output_frames);
+
+  if (input_buffer) {
+    if (pop_input_count) {
+      internal_input_buffer.pop(nullptr, pop_input_count);
+    }
+
+    *input_frames_count = output_frames;
+    drop_audio_if_needed();
+  }
+
+  return rv;
+}
+
+template<typename T, typename InputProcessor, typename OutputProcessor>
+cubeb_resampler_speex<T, InputProcessor, OutputProcessor>
+  ::cubeb_resampler_speex(InputProcessor * input_processor,
+                          OutputProcessor * output_processor,
+                          cubeb_stream * s,
+                          cubeb_data_callback cb,
+                          void * ptr)
+  : input_processor(input_processor)
+  , output_processor(output_processor)
+  , stream(s)
+  , data_callback(cb)
+  , user_ptr(ptr)
+{
+  if (input_processor && output_processor) {
+    // Add some delay on the processor that has the lowest delay so that the
+    // streams are synchronized.
+    uint32_t in_latency = input_processor->latency();
+    uint32_t out_latency = output_processor->latency();
+    if (in_latency > out_latency) {
+      uint32_t latency_diff = in_latency - out_latency;
+      output_processor->add_latency(latency_diff);
+    } else if (in_latency < out_latency) {
+      uint32_t latency_diff = out_latency - in_latency;
+      input_processor->add_latency(latency_diff);
+    }
+    fill_internal = &cubeb_resampler_speex::fill_internal_duplex;
+  }  else if (input_processor) {
+    fill_internal = &cubeb_resampler_speex::fill_internal_input;
+  }  else if (output_processor) {
+    fill_internal = &cubeb_resampler_speex::fill_internal_output;
+  }
+}
+
+template<typename T, typename InputProcessor, typename OutputProcessor>
+cubeb_resampler_speex<T, InputProcessor, OutputProcessor>
+  ::~cubeb_resampler_speex()
+{ }
+
+template<typename T, typename InputProcessor, typename OutputProcessor>
+long
+cubeb_resampler_speex<T, InputProcessor, OutputProcessor>
+::fill(void * input_buffer, long * input_frames_count,
+       void * output_buffer, long output_frames_needed)
+{
+  /* Input and output buffers, typed */
+  T * in_buffer = reinterpret_cast<T*>(input_buffer);
+  T * out_buffer = reinterpret_cast<T*>(output_buffer);
+  return (this->*fill_internal)(in_buffer, input_frames_count,
+                                out_buffer, output_frames_needed);
+}
+
+template<typename T, typename InputProcessor, typename OutputProcessor>
+long
+cubeb_resampler_speex<T, InputProcessor, OutputProcessor>
+::fill_internal_output(T * input_buffer, long * input_frames_count,
+                       T * output_buffer, long output_frames_needed)
+{
+  assert(!input_buffer && (!input_frames_count || *input_frames_count == 0) &&
+         output_buffer && output_frames_needed);
+
+  if (!draining) {
+    long got = 0;
+    T * out_unprocessed = nullptr;
+    long output_frames_before_processing = 0;
+
+    /* fill directly the input buffer of the output processor to save a copy */
+    output_frames_before_processing =
+      output_processor->input_needed_for_output(output_frames_needed);
+
+    out_unprocessed =
+      output_processor->input_buffer(output_frames_before_processing);
+
+    got = data_callback(stream, user_ptr,
+                        nullptr, out_unprocessed,
+                        output_frames_before_processing);
+
+    if (got < output_frames_before_processing) {
+      draining = true;
+
+      if (got < 0) {
+        return got;
+      }
+    }
+
+    output_processor->written(got);
+  }
+
+  /* Process the output. If not enough frames have been returned from the
+  * callback, drain the processors. */
+  return output_processor->output(output_buffer, output_frames_needed);
+}
+
+template<typename T, typename InputProcessor, typename OutputProcessor>
+long
+cubeb_resampler_speex<T, InputProcessor, OutputProcessor>
+::fill_internal_input(T * input_buffer, long * input_frames_count,
+                      T * output_buffer, long /*output_frames_needed*/)
+{
+  assert(input_buffer && input_frames_count && *input_frames_count &&
+         !output_buffer);
+
+  /* The input data, after eventual resampling. This is passed to the callback. */
+  T * resampled_input = nullptr;
+  uint32_t resampled_frame_count = input_processor->output_for_input(*input_frames_count);
+
+  /* process the input, and present exactly `output_frames_needed` in the
+  * callback. */
+  input_processor->input(input_buffer, *input_frames_count);
+
+  size_t frames_resampled = 0;
+  resampled_input = input_processor->output(resampled_frame_count, &frames_resampled);
+  *input_frames_count = frames_resampled;
+
+  long got = data_callback(stream, user_ptr,
+                           resampled_input, nullptr, resampled_frame_count);
+
+  /* Return the number of initial input frames or part of it.
+  * Since output_frames_needed == 0 in input scenario, the only
+  * available number outside resampler is the initial number of frames. */
+  return (*input_frames_count) * (got / resampled_frame_count);
+}
+
+template<typename T, typename InputProcessor, typename OutputProcessor>
+long
+cubeb_resampler_speex<T, InputProcessor, OutputProcessor>
+::fill_internal_duplex(T * in_buffer, long * input_frames_count,
+                       T * out_buffer, long output_frames_needed)
+{
+  if (draining) {
+    // discard input and drain any signal remaining in the resampler.
+    return output_processor->output(out_buffer, output_frames_needed);
+  }
+
+  /* The input data, after eventual resampling. This is passed to the callback. */
+  T * resampled_input = nullptr;
+  /* The output buffer passed down in the callback, that might be resampled. */
+  T * out_unprocessed = nullptr;
+  long output_frames_before_processing = 0;
+  /* The number of frames returned from the callback. */
+  long got = 0;
+
+  /* We need to determine how much frames to present to the consumer.
+   * - If we have a two way stream, but we're only resampling input, we resample
+   * the input to the number of output frames.
+   * - If we have a two way stream, but we're only resampling the output, we
+   * resize the input buffer of the output resampler to the number of input
+   * frames, and we resample it afterwards.
+   * - If we resample both ways, we resample the input to the number of frames
+   * we would need to pass down to the consumer (before resampling the output),
+   * get the output data, and resample it to the number of frames needed by the
+   * caller. */
+
+  output_frames_before_processing =
+    output_processor->input_needed_for_output(output_frames_needed);
+   /* fill directly the input buffer of the output processor to save a copy */
+  out_unprocessed =
+    output_processor->input_buffer(output_frames_before_processing);
+
+  if (in_buffer) {
+    /* process the input, and present exactly `output_frames_needed` in the
+    * callback. */
+    input_processor->input(in_buffer, *input_frames_count);
+
+    size_t frames_resampled = 0;
+    resampled_input =
+      input_processor->output(output_frames_before_processing, &frames_resampled);
+    *input_frames_count = frames_resampled;
+  } else {
+    resampled_input = nullptr;
+  }
+
+  got = data_callback(stream, user_ptr,
+                      resampled_input, out_unprocessed,
+                      output_frames_before_processing);
+
+  if (got < output_frames_before_processing) {
+    draining = true;
+
+    if (got < 0) {
+      return got;
+    }
+  }
+
+  output_processor->written(got);
+
+  input_processor->drop_audio_if_needed();
+
+  /* Process the output. If not enough frames have been returned from the
+   * callback, drain the processors. */
+  got = output_processor->output(out_buffer, output_frames_needed);
+
+  output_processor->drop_audio_if_needed();
+
+  return got;
+}
+
+/* Resampler C API */
+
+cubeb_resampler *
+cubeb_resampler_create(cubeb_stream * stream,
+                       cubeb_stream_params * input_params,
+                       cubeb_stream_params * output_params,
+                       unsigned int target_rate,
+                       cubeb_data_callback callback,
+                       void * user_ptr,
+                       cubeb_resampler_quality quality)
+{
+  cubeb_sample_format format;
+
+  assert(input_params || output_params);
+
+  if (input_params) {
+    format = input_params->format;
+  } else {
+    format = output_params->format;
+  }
+
+  switch(format) {
+    case CUBEB_SAMPLE_S16NE:
+      return cubeb_resampler_create_internal<short>(stream,
+                                                    input_params,
+                                                    output_params,
+                                                    target_rate,
+                                                    callback,
+                                                    user_ptr,
+                                                    quality);
+    case CUBEB_SAMPLE_FLOAT32NE:
+      return cubeb_resampler_create_internal<float>(stream,
+                                                    input_params,
+                                                    output_params,
+                                                    target_rate,
+                                                    callback,
+                                                    user_ptr,
+                                                    quality);
+    default:
+      assert(false);
+      return nullptr;
+  }
+}
+
+long
+cubeb_resampler_fill(cubeb_resampler * resampler,
+                     void * input_buffer,
+                     long * input_frames_count,
+                     void * output_buffer,
+                     long output_frames_needed)
+{
+  return resampler->fill(input_buffer, input_frames_count,
+                         output_buffer, output_frames_needed);
+}
+
+void
+cubeb_resampler_destroy(cubeb_resampler * resampler)
+{
+  delete resampler;
+}
+
+long
+cubeb_resampler_latency(cubeb_resampler * resampler)
+{
+  return resampler->latency();
+}

dep/cubeb/src/cubeb_resampler.h

@@ -0,0 +1,85 @@
+/*
+ * Copyright © 2014 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#ifndef CUBEB_RESAMPLER_H
+#define CUBEB_RESAMPLER_H
+
+#include "cubeb/cubeb.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+typedef struct cubeb_resampler cubeb_resampler;
+
+typedef enum {
+  CUBEB_RESAMPLER_QUALITY_VOIP,
+  CUBEB_RESAMPLER_QUALITY_DEFAULT,
+  CUBEB_RESAMPLER_QUALITY_DESKTOP
+} cubeb_resampler_quality;
+
+/**
+ * Create a resampler to adapt the requested sample rate into something that
+ * is accepted by the audio backend.
+ * @param stream A cubeb_stream instance supplied to the data callback.
+ * @param input_params Used to calculate bytes per frame and buffer size for
+ * resampling of the input side of the stream. NULL if input should not be
+ * resampled.
+ * @param output_params Used to calculate bytes per frame and buffer size for
+ * resampling of the output side of the stream. NULL if output should not be
+ * resampled.
+ * @param target_rate The sampling rate after resampling for the input side of
+ * the stream, and/or the sampling rate prior to resampling of the output side
+ * of the stream.
+ * @param callback A callback to request data for resampling.
+ * @param user_ptr User data supplied to the data callback.
+ * @param quality Quality of the resampler.
+ * @retval A non-null pointer if success.
+ */
+cubeb_resampler * cubeb_resampler_create(cubeb_stream * stream,
+                                         cubeb_stream_params * input_params,
+                                         cubeb_stream_params * output_params,
+                                         unsigned int target_rate,
+                                         cubeb_data_callback callback,
+                                         void * user_ptr,
+                                         cubeb_resampler_quality quality);
+
+/**
+ * Fill the buffer with frames acquired using the data callback. Resampling will
+ * happen if necessary.
+ * @param resampler A cubeb_resampler instance.
+ * @param input_buffer A buffer of input samples
+ * @param input_frame_count The size of the buffer. Returns the number of frames
+ * consumed.
+ * @param output_buffer The buffer to be filled.
+ * @param output_frames_needed Number of frames that should be produced.
+ * @retval Number of frames that are actually produced.
+ * @retval CUBEB_ERROR on error.
+ */
+long cubeb_resampler_fill(cubeb_resampler * resampler,
+                          void * input_buffer,
+                          long * input_frame_count,
+                          void * output_buffer,
+                          long output_frames_needed);
+
+/**
+ * Destroy a cubeb_resampler.
+ * @param resampler A cubeb_resampler instance.
+ */
+void cubeb_resampler_destroy(cubeb_resampler * resampler);
+
+/**
+ * Returns the latency, in frames, of the resampler.
+ * @param resampler A cubeb resampler instance.
+ * @retval The latency, in frames, induced by the resampler.
+ */
+long cubeb_resampler_latency(cubeb_resampler * resampler);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* CUBEB_RESAMPLER_H */

dep/cubeb/src/cubeb_resampler_internal.h

@@ -0,0 +1,602 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#if !defined(CUBEB_RESAMPLER_INTERNAL)
+#define CUBEB_RESAMPLER_INTERNAL
+
+#include <cmath>
+#include <cassert>
+#include <algorithm>
+#include <memory>
+#ifdef CUBEB_GECKO_BUILD
+#include "mozilla/UniquePtr.h"
+// In libc++, symbols such as std::unique_ptr may be defined in std::__1.
+// The _LIBCPP_BEGIN_NAMESPACE_STD and _LIBCPP_END_NAMESPACE_STD macros
+// will expand to the correct namespace.
+#ifdef _LIBCPP_BEGIN_NAMESPACE_STD
+#define MOZ_BEGIN_STD_NAMESPACE _LIBCPP_BEGIN_NAMESPACE_STD
+#define MOZ_END_STD_NAMESPACE _LIBCPP_END_NAMESPACE_STD
+#else
+#define MOZ_BEGIN_STD_NAMESPACE namespace std {
+#define MOZ_END_STD_NAMESPACE }
+#endif
+MOZ_BEGIN_STD_NAMESPACE
+  using mozilla::DefaultDelete;
+  using mozilla::UniquePtr;
+  #define default_delete DefaultDelete
+  #define unique_ptr UniquePtr
+MOZ_END_STD_NAMESPACE
+#endif
+#include "cubeb/cubeb.h"
+#include "cubeb_utils.h"
+#include "cubeb-speex-resampler.h"
+#include "cubeb_resampler.h"
+#include <stdio.h>
+
+/* This header file contains the internal C++ API of the resamplers, for testing. */
+
+// When dropping audio input frames to prevent building
+// an input delay, this function returns the number of frames
+// to keep in the buffer.
+// @parameter sample_rate The sample rate of the stream.
+// @return A number of frames to keep.
+uint32_t min_buffered_audio_frame(uint32_t sample_rate);
+
+int to_speex_quality(cubeb_resampler_quality q);
+
+struct cubeb_resampler {
+  virtual long fill(void * input_buffer, long * input_frames_count,
+                    void * output_buffer, long frames_needed) = 0;
+  virtual long latency() = 0;
+  virtual ~cubeb_resampler() {}
+};
+
+/** Base class for processors. This is just used to share methods for now. */
+class processor {
+public:
+  explicit processor(uint32_t channels)
+    : channels(channels)
+  {}
+protected:
+  size_t frames_to_samples(size_t frames) const
+  {
+    return frames * channels;
+  }
+  size_t samples_to_frames(size_t samples) const
+  {
+    assert(!(samples % channels));
+    return samples / channels;
+  }
+  /** The number of channel of the audio buffers to be resampled. */
+  const uint32_t channels;
+};
+
+template<typename T>
+class passthrough_resampler : public cubeb_resampler
+                            , public processor {
+public:
+  passthrough_resampler(cubeb_stream * s,
+                        cubeb_data_callback cb,
+                        void * ptr,
+                        uint32_t input_channels,
+                        uint32_t sample_rate);
+
+  virtual long fill(void * input_buffer, long * input_frames_count,
+                    void * output_buffer, long output_frames);
+
+  virtual long latency()
+  {
+    return 0;
+  }
+
+  void drop_audio_if_needed()
+  {
+    uint32_t to_keep = min_buffered_audio_frame(sample_rate);
+    uint32_t available = samples_to_frames(internal_input_buffer.length());
+    if (available > to_keep) {
+      internal_input_buffer.pop(nullptr, frames_to_samples(available - to_keep));
+    }
+  }
+
+private:
+  cubeb_stream * const stream;
+  const cubeb_data_callback data_callback;
+  void * const user_ptr;
+  /* This allows to buffer some input to account for the fact that we buffer
+   * some inputs. */
+  auto_array<T> internal_input_buffer;
+  uint32_t sample_rate;
+};
+
+/** Bidirectional resampler, can resample an input and an output stream, or just
+ * an input stream or output stream. In this case a delay is inserted in the
+ * opposite direction to keep the streams synchronized. */
+template<typename T, typename InputProcessing, typename OutputProcessing>
+class cubeb_resampler_speex : public cubeb_resampler {
+public:
+  cubeb_resampler_speex(InputProcessing * input_processor,
+                        OutputProcessing * output_processor,
+                        cubeb_stream * s,
+                        cubeb_data_callback cb,
+                        void * ptr);
+
+  virtual ~cubeb_resampler_speex();
+
+  virtual long fill(void * input_buffer, long * input_frames_count,
+                    void * output_buffer, long output_frames_needed);
+
+  virtual long latency()
+  {
+    if (input_processor && output_processor) {
+      assert(input_processor->latency() == output_processor->latency());
+      return input_processor->latency();
+    } else if (input_processor) {
+      return input_processor->latency();
+    } else {
+      return output_processor->latency();
+    }
+  }
+
+private:
+  typedef long(cubeb_resampler_speex::*processing_callback)(T * input_buffer, long * input_frames_count, T * output_buffer, long output_frames_needed);
+
+  long fill_internal_duplex(T * input_buffer, long * input_frames_count,
+                            T * output_buffer, long output_frames_needed);
+  long fill_internal_input(T * input_buffer, long * input_frames_count,
+                           T * output_buffer, long output_frames_needed);
+  long fill_internal_output(T * input_buffer, long * input_frames_count,
+                            T * output_buffer, long output_frames_needed);
+
+  std::unique_ptr<InputProcessing> input_processor;
+  std::unique_ptr<OutputProcessing> output_processor;
+  processing_callback fill_internal;
+  cubeb_stream * const stream;
+  const cubeb_data_callback data_callback;
+  void * const user_ptr;
+  bool draining = false;
+};
+
+/** Handles one way of a (possibly) duplex resampler, working on interleaved
+ * audio buffers of type T. This class is designed so that the number of frames
+ * coming out of the resampler can be precisely controled. It manages its own
+ * input buffer, and can use the caller's output buffer, or allocate its own. */
+template<typename T>
+class cubeb_resampler_speex_one_way : public processor {
+public:
+  /** The sample type of this resampler, either 16-bit integers or 32-bit
+   * floats. */
+  typedef T sample_type;
+  /** Construct a resampler resampling from #source_rate to #target_rate, that
+   * can be arbitrary, strictly positive number.
+   * @parameter channels The number of channels this resampler will resample.
+   * @parameter source_rate The sample-rate of the audio input.
+   * @parameter target_rate The sample-rate of the audio output.
+   * @parameter quality A number between 0 (fast, low quality) and 10 (slow,
+   * high quality). */
+  cubeb_resampler_speex_one_way(uint32_t channels,
+                                uint32_t source_rate,
+                                uint32_t target_rate,
+                                int quality)
+  : processor(channels)
+  , resampling_ratio(static_cast<float>(source_rate) / target_rate)
+  , source_rate(source_rate)
+  , additional_latency(0)
+  , leftover_samples(0)
+  {
+    int r;
+    speex_resampler = speex_resampler_init(channels, source_rate,
+                                           target_rate, quality, &r);
+    assert(r == RESAMPLER_ERR_SUCCESS && "resampler allocation failure");
+  }
+
+  /** Destructor, deallocate the resampler */
+  virtual ~cubeb_resampler_speex_one_way()
+  {
+    speex_resampler_destroy(speex_resampler);
+  }
+
+  /** Sometimes, it is necessary to add latency on one way of a two-way
+   * resampler so that the stream are synchronized. This must be called only on
+   * a fresh resampler, otherwise, silent samples will be inserted in the
+   * stream.
+   * @param frames the number of frames of latency to add. */
+  void add_latency(size_t frames)
+  {
+    additional_latency += frames;
+    resampling_in_buffer.push_silence(frames_to_samples(frames));
+  }
+
+  /* Fill the resampler with `input_frame_count` frames. */
+  void input(T * input_buffer, size_t input_frame_count)
+  {
+    resampling_in_buffer.push(input_buffer,
+                              frames_to_samples(input_frame_count));
+  }
+
+  /** Outputs exactly `output_frame_count` into `output_buffer`.
+    * `output_buffer` has to be at least `output_frame_count` long. */
+  size_t output(T * output_buffer, size_t output_frame_count)
+  {
+    uint32_t in_len = samples_to_frames(resampling_in_buffer.length());
+    uint32_t out_len = output_frame_count;
+
+    speex_resample(resampling_in_buffer.data(), &in_len,
+                   output_buffer, &out_len);
+
+    /* This shifts back any unresampled samples to the beginning of the input
+       buffer. */
+    resampling_in_buffer.pop(nullptr, frames_to_samples(in_len));
+
+    return out_len;
+  }
+
+  size_t output_for_input(uint32_t input_frames)
+  {
+    return (size_t)floorf((input_frames + samples_to_frames(resampling_in_buffer.length()))
+                         / resampling_ratio);
+  }
+
+  /** Returns a buffer containing exactly `output_frame_count` resampled frames.
+    * The consumer should not hold onto the pointer. */
+  T * output(size_t output_frame_count, size_t * input_frames_used)
+  {
+    if (resampling_out_buffer.capacity() < frames_to_samples(output_frame_count)) {
+      resampling_out_buffer.reserve(frames_to_samples(output_frame_count));
+    }
+
+    uint32_t in_len = samples_to_frames(resampling_in_buffer.length());
+    uint32_t out_len = output_frame_count;
+
+    speex_resample(resampling_in_buffer.data(), &in_len,
+                   resampling_out_buffer.data(), &out_len);
+
+    assert(out_len == output_frame_count);
+
+    /* This shifts back any unresampled samples to the beginning of the input
+       buffer. */
+    resampling_in_buffer.pop(nullptr, frames_to_samples(in_len));
+    *input_frames_used = in_len;
+
+    return resampling_out_buffer.data();
+  }
+
+  /** Get the latency of the resampler, in output frames. */
+  uint32_t latency() const
+  {
+    /* The documentation of the resampler talks about "samples" here, but it
+     * only consider a single channel here so it's the same number of frames. */
+    int latency = 0;
+
+    latency =
+      speex_resampler_get_output_latency(speex_resampler) + additional_latency;
+
+    assert(latency >= 0);
+
+    return latency;
+  }
+
+  /** Returns the number of frames to pass in the input of the resampler to have
+   * exactly `output_frame_count` resampled frames. This can return a number
+   * slightly bigger than what is strictly necessary, but it guaranteed that the
+   * number of output frames will be exactly equal. */
+  uint32_t input_needed_for_output(uint32_t output_frame_count) const
+  {
+    int32_t unresampled_frames_left = samples_to_frames(resampling_in_buffer.length());
+    int32_t resampled_frames_left = samples_to_frames(resampling_out_buffer.length());
+    float input_frames_needed =
+      (output_frame_count - unresampled_frames_left) * resampling_ratio
+        - resampled_frames_left;
+    if (input_frames_needed < 0) {
+      return 0;
+    }
+    return (uint32_t)ceilf(input_frames_needed);
+  }
+
+  /** Returns a pointer to the input buffer, that contains empty space for at
+   * least `frame_count` elements. This is useful so that consumer can directly
+   * write into the input buffer of the resampler. The pointer returned is
+   * adjusted so that leftover data are not overwritten.
+   */
+  T * input_buffer(size_t frame_count)
+  {
+    leftover_samples = resampling_in_buffer.length();
+    resampling_in_buffer.reserve(leftover_samples +
+                                 frames_to_samples(frame_count));
+    return resampling_in_buffer.data() + leftover_samples;
+  }
+
+  /** This method works with `input_buffer`, and allows to inform the processor
+      how much frames have been written in the provided buffer. */
+  void written(size_t written_frames)
+  {
+    resampling_in_buffer.set_length(leftover_samples +
+                                    frames_to_samples(written_frames));
+  }
+
+  void drop_audio_if_needed()
+  {
+    // Keep at most 100ms buffered.
+    uint32_t available = samples_to_frames(resampling_in_buffer.length());
+    uint32_t to_keep = min_buffered_audio_frame(source_rate);
+    if (available > to_keep) {
+      resampling_in_buffer.pop(nullptr, frames_to_samples(available - to_keep));
+    }
+  }
+private:
+  /** Wrapper for the speex resampling functions to have a typed
+    * interface. */
+  void speex_resample(float * input_buffer, uint32_t * input_frame_count,
+                      float * output_buffer, uint32_t * output_frame_count)
+  {
+#ifndef NDEBUG
+    int rv;
+    rv =
+#endif
+      speex_resampler_process_interleaved_float(speex_resampler,
+                                                input_buffer,
+                                                input_frame_count,
+                                                output_buffer,
+                                                output_frame_count);
+    assert(rv == RESAMPLER_ERR_SUCCESS);
+  }
+
+  void speex_resample(short * input_buffer, uint32_t * input_frame_count,
+                      short * output_buffer, uint32_t * output_frame_count)
+  {
+#ifndef NDEBUG
+    int rv;
+    rv =
+#endif
+      speex_resampler_process_interleaved_int(speex_resampler,
+                                              input_buffer,
+                                              input_frame_count,
+                                              output_buffer,
+                                              output_frame_count);
+    assert(rv == RESAMPLER_ERR_SUCCESS);
+  }
+  /** The state for the speex resampler used internaly. */
+  SpeexResamplerState * speex_resampler;
+  /** Source rate / target rate. */
+  const float resampling_ratio;
+  const uint32_t source_rate;
+  /** Storage for the input frames, to be resampled. Also contains
+   * any unresampled frames after resampling. */
+  auto_array<T> resampling_in_buffer;
+  /* Storage for the resampled frames, to be passed back to the caller. */
+  auto_array<T> resampling_out_buffer;
+  /** Additional latency inserted into the pipeline for synchronisation. */
+  uint32_t additional_latency;
+  /** When `input_buffer` is called, this allows tracking the number of samples
+      that were in the buffer. */
+  uint32_t leftover_samples;
+};
+
+/** This class allows delaying an audio stream by `frames` frames. */
+template<typename T>
+class delay_line : public processor {
+public:
+  /** Constructor
+   * @parameter frames the number of frames of delay.
+   * @parameter channels the number of channels of this delay line.
+   * @parameter sample_rate sample-rate of the audio going through this delay line */
+  delay_line(uint32_t frames, uint32_t channels, uint32_t sample_rate)
+    : processor(channels)
+    , length(frames)
+    , leftover_samples(0)
+    , sample_rate(sample_rate)
+  {
+    /* Fill the delay line with some silent frames to add latency. */
+    delay_input_buffer.push_silence(frames * channels);
+  }
+  /* Add some latency to the delay line.
+   * @param frames the number of frames of latency to add. */
+  void add_latency(size_t frames)
+  {
+    length += frames;
+    delay_input_buffer.push_silence(frames_to_samples(frames));
+  }
+  /** Push some frames into the delay line.
+   * @parameter buffer the frames to push.
+   * @parameter frame_count the number of frames in #buffer. */
+  void input(T * buffer, uint32_t frame_count)
+  {
+    delay_input_buffer.push(buffer, frames_to_samples(frame_count));
+  }
+  /** Pop some frames from the internal buffer, into a internal output buffer.
+   * @parameter frames_needed the number of frames to be returned.
+   * @return a buffer containing the delayed frames. The consumer should not
+   * hold onto the pointer. */
+  T * output(uint32_t frames_needed, size_t * input_frames_used)
+  {
+    if (delay_output_buffer.capacity() < frames_to_samples(frames_needed)) {
+      delay_output_buffer.reserve(frames_to_samples(frames_needed));
+    }
+
+    delay_output_buffer.clear();
+    delay_output_buffer.push(delay_input_buffer.data(),
+                             frames_to_samples(frames_needed));
+    delay_input_buffer.pop(nullptr, frames_to_samples(frames_needed));
+    *input_frames_used = frames_needed;
+
+    return delay_output_buffer.data();
+  }
+  /** Get a pointer to the first writable location in the input buffer>
+   * @parameter frames_needed the number of frames the user needs to write into
+   * the buffer.
+   * @returns a pointer to a location in the input buffer where #frames_needed
+   * can be writen. */
+  T * input_buffer(uint32_t frames_needed)
+  {
+    leftover_samples = delay_input_buffer.length();
+    delay_input_buffer.reserve(leftover_samples + frames_to_samples(frames_needed));
+    return delay_input_buffer.data() + leftover_samples;
+  }
+  /** This method works with `input_buffer`, and allows to inform the processor
+      how much frames have been written in the provided buffer. */
+  void written(size_t frames_written)
+  {
+    delay_input_buffer.set_length(leftover_samples +
+                                  frames_to_samples(frames_written));
+  }
+  /** Drains the delay line, emptying the buffer.
+   * @parameter output_buffer the buffer in which the frames are written.
+   * @parameter frames_needed the maximum number of frames to write.
+   * @return the actual number of frames written. */
+  size_t output(T * output_buffer, uint32_t frames_needed)
+  {
+    uint32_t in_len = samples_to_frames(delay_input_buffer.length());
+    uint32_t out_len = frames_needed;
+
+    uint32_t to_pop = std::min(in_len, out_len);
+
+    delay_input_buffer.pop(output_buffer, frames_to_samples(to_pop));
+
+    return to_pop;
+  }
+  /** Returns the number of frames one needs to input into the delay line to get
+   * #frames_needed frames back.
+   * @parameter frames_needed the number of frames one want to write into the
+   * delay_line
+   * @returns the number of frames one will get. */
+  size_t input_needed_for_output(uint32_t frames_needed) const
+  {
+    return frames_needed;
+  }
+  /** Returns the number of frames produces for `input_frames` frames in input */
+  size_t output_for_input(uint32_t input_frames)
+  {
+    return input_frames;
+  }
+  /** The number of frames this delay line delays the stream by.
+   * @returns The number of frames of delay. */
+  size_t latency()
+  {
+    return length;
+  }
+
+  void drop_audio_if_needed()
+  {
+    size_t available = samples_to_frames(delay_input_buffer.length());
+    uint32_t to_keep = min_buffered_audio_frame(sample_rate);
+    if (available > to_keep) {
+      delay_input_buffer.pop(nullptr, frames_to_samples(available - to_keep));
+    }
+  }
+private:
+  /** The length, in frames, of this delay line */
+  uint32_t length;
+  /** When `input_buffer` is called, this allows tracking the number of samples
+      that where in the buffer. */
+  uint32_t leftover_samples;
+  /** The input buffer, where the delay is applied. */
+  auto_array<T> delay_input_buffer;
+  /** The output buffer. This is only ever used if using the ::output with a
+   * single argument. */
+  auto_array<T> delay_output_buffer;
+  uint32_t sample_rate;
+};
+
+/** This sits behind the C API and is more typed. */
+template<typename T>
+cubeb_resampler *
+cubeb_resampler_create_internal(cubeb_stream * stream,
+                                cubeb_stream_params * input_params,
+                                cubeb_stream_params * output_params,
+                                unsigned int target_rate,
+                                cubeb_data_callback callback,
+                                void * user_ptr,
+                                cubeb_resampler_quality quality)
+{
+  std::unique_ptr<cubeb_resampler_speex_one_way<T>> input_resampler = nullptr;
+  std::unique_ptr<cubeb_resampler_speex_one_way<T>> output_resampler = nullptr;
+  std::unique_ptr<delay_line<T>> input_delay = nullptr;
+  std::unique_ptr<delay_line<T>> output_delay = nullptr;
+
+  assert((input_params || output_params) &&
+         "need at least one valid parameter pointer.");
+
+  /* All the streams we have have a sample rate that matches the target
+     sample rate, use a no-op resampler, that simply forwards the buffers to the
+     callback. */
+  if (((input_params && input_params->rate == target_rate) &&
+      (output_params && output_params->rate == target_rate)) ||
+      (input_params && !output_params && (input_params->rate == target_rate)) ||
+      (output_params && !input_params && (output_params->rate == target_rate))) {
+    return new passthrough_resampler<T>(stream, callback,
+                                        user_ptr,
+                                        input_params ? input_params->channels : 0,
+                                        target_rate);
+  }
+
+  /* Determine if we need to resampler one or both directions, and create the
+     resamplers. */
+  if (output_params && (output_params->rate != target_rate)) {
+    output_resampler.reset(
+        new cubeb_resampler_speex_one_way<T>(output_params->channels,
+                                             target_rate,
+                                             output_params->rate,
+                                             to_speex_quality(quality)));
+    if (!output_resampler) {
+      return NULL;
+    }
+  }
+
+  if (input_params && (input_params->rate != target_rate)) {
+    input_resampler.reset(
+        new cubeb_resampler_speex_one_way<T>(input_params->channels,
+                                             input_params->rate,
+                                             target_rate,
+                                             to_speex_quality(quality)));
+    if (!input_resampler) {
+      return NULL;
+    }
+  }
+
+  /* If we resample only one direction but we have a duplex stream, insert a
+   * delay line with a length equal to the resampler latency of the
+   * other direction so that the streams are synchronized. */
+  if (input_resampler && !output_resampler && input_params && output_params) {
+    output_delay.reset(new delay_line<T>(input_resampler->latency(),
+                                         output_params->channels,
+                                         output_params->rate));
+    if (!output_delay) {
+      return NULL;
+    }
+  } else if (output_resampler && !input_resampler && input_params && output_params) {
+    input_delay.reset(new delay_line<T>(output_resampler->latency(),
+                                        input_params->channels,
+                                        output_params->rate));
+    if (!input_delay) {
+      return NULL;
+    }
+  }
+
+  if (input_resampler && output_resampler) {
+    return new cubeb_resampler_speex<T,
+                                     cubeb_resampler_speex_one_way<T>,
+                                     cubeb_resampler_speex_one_way<T>>
+                                       (input_resampler.release(),
+                                        output_resampler.release(),
+                                        stream, callback, user_ptr);
+  } else if (input_resampler) {
+    return new cubeb_resampler_speex<T,
+                                     cubeb_resampler_speex_one_way<T>,
+                                     delay_line<T>>
+                                      (input_resampler.release(),
+                                       output_delay.release(),
+                                       stream, callback, user_ptr);
+  } else {
+    return new cubeb_resampler_speex<T,
+                                     delay_line<T>,
+                                     cubeb_resampler_speex_one_way<T>>
+                                      (input_delay.release(),
+                                       output_resampler.release(),
+                                       stream, callback, user_ptr);
+  }
+}
+
+#endif /* CUBEB_RESAMPLER_INTERNAL */

dep/cubeb/src/cubeb_ring_array.h

@@ -0,0 +1,159 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef CUBEB_RING_ARRAY_H
+#define CUBEB_RING_ARRAY_H
+
+#include "cubeb_utils.h"
+
+/** Ring array of pointers is used to hold buffers. In case that
+    asynchronous producer/consumer callbacks do not arrive in a
+    repeated order the ring array stores the buffers and fetch
+    them in the correct order. */
+
+typedef struct {
+  AudioBuffer * buffer_array;   /**< Array that hold pointers of the allocated space for the buffers. */
+  unsigned int tail;            /**< Index of the last element (first to deliver). */
+  unsigned int count;           /**< Number of elements in the array. */
+  unsigned int capacity;        /**< Total length of the array. */
+} ring_array;
+
+static int
+single_audiobuffer_init(AudioBuffer * buffer,
+                        uint32_t bytesPerFrame,
+                        uint32_t channelsPerFrame,
+                        uint32_t frames)
+{
+  assert(buffer);
+  assert(bytesPerFrame > 0 && channelsPerFrame && frames > 0);
+
+  size_t size = bytesPerFrame * frames;
+  buffer->mData = operator new(size);
+  if (buffer->mData == NULL) {
+    return CUBEB_ERROR;
+  }
+  PodZero(static_cast<char*>(buffer->mData), size);
+
+  buffer->mNumberChannels = channelsPerFrame;
+  buffer->mDataByteSize = size;
+
+  return CUBEB_OK;
+}
+
+/** Initialize the ring array.
+    @param ra The ring_array pointer of allocated structure.
+    @retval 0 on success. */
+int
+ring_array_init(ring_array * ra,
+                uint32_t capacity,
+                uint32_t bytesPerFrame,
+                uint32_t channelsPerFrame,
+                uint32_t framesPerBuffer)
+{
+  assert(ra);
+  if (capacity == 0 || bytesPerFrame == 0 ||
+      channelsPerFrame == 0 || framesPerBuffer == 0) {
+    return CUBEB_ERROR_INVALID_PARAMETER;
+  }
+  ra->capacity = capacity;
+  ra->tail = 0;
+  ra->count = 0;
+
+  ra->buffer_array = new AudioBuffer[ra->capacity];
+  PodZero(ra->buffer_array, ra->capacity);
+  if (ra->buffer_array == NULL) {
+    return CUBEB_ERROR;
+  }
+
+  for (unsigned int i = 0; i < ra->capacity; ++i) {
+    if (single_audiobuffer_init(&ra->buffer_array[i],
+                                bytesPerFrame,
+                                channelsPerFrame,
+                                framesPerBuffer) != CUBEB_OK) {
+      return CUBEB_ERROR;
+    }
+  }
+
+  return CUBEB_OK;
+}
+
+/** Destroy the ring array.
+    @param ra The ring_array pointer.*/
+void
+ring_array_destroy(ring_array * ra)
+{
+  assert(ra);
+  if (ra->buffer_array == NULL){
+    return;
+  }
+  for (unsigned int i = 0; i < ra->capacity; ++i) {
+    if (ra->buffer_array[i].mData) {
+      operator delete(ra->buffer_array[i].mData);
+    }
+  }
+  delete [] ra->buffer_array;
+}
+
+/** Get the allocated buffer to be stored with fresh data.
+    @param ra The ring_array pointer.
+    @retval Pointer of the allocated space to be stored with fresh data or NULL if full. */
+AudioBuffer *
+ring_array_get_free_buffer(ring_array * ra)
+{
+  assert(ra && ra->buffer_array);
+  assert(ra->buffer_array[0].mData != NULL);
+  if (ra->count == ra->capacity) {
+    return NULL;
+  }
+
+  assert(ra->count == 0 || (ra->tail + ra->count) % ra->capacity != ra->tail);
+  AudioBuffer * ret = &ra->buffer_array[(ra->tail + ra->count) % ra->capacity];
+
+  ++ra->count;
+  assert(ra->count <= ra->capacity);
+
+  return ret;
+}
+
+/** Get the next available buffer with data.
+    @param ra The ring_array pointer.
+    @retval Pointer of the next in order data buffer or NULL if empty. */
+AudioBuffer *
+ring_array_get_data_buffer(ring_array * ra)
+{
+  assert(ra && ra->buffer_array);
+  assert(ra->buffer_array[0].mData != NULL);
+
+  if (ra->count == 0) {
+    return NULL;
+  }
+  AudioBuffer * ret = &ra->buffer_array[ra->tail];
+
+  ra->tail = (ra->tail + 1) % ra->capacity;
+  assert(ra->tail < ra->capacity);
+
+  assert(ra->count > 0);
+  --ra->count;
+
+  return ret;
+}
+
+/** When array is empty get the first allocated buffer in the array.
+    @param ra The ring_array pointer.
+    @retval If arrays is empty, pointer of the allocated space else NULL. */
+AudioBuffer *
+ring_array_get_dummy_buffer(ring_array * ra)
+{
+  assert(ra && ra->buffer_array);
+  assert(ra->capacity > 0);
+  if (ra->count > 0) {
+    return NULL;
+  }
+  return &ra->buffer_array[0];
+}
+
+#endif //CUBEB_RING_ARRAY_H

dep/cubeb/src/cubeb_ringbuffer.h

@@ -0,0 +1,495 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef CUBEB_RING_BUFFER_H
+#define CUBEB_RING_BUFFER_H
+
+#include "cubeb_utils.h"
+#include <algorithm>
+#include <atomic>
+#include <cstdint>
+#include <memory>
+#include <thread>
+
+/**
+ * Single producer single consumer lock-free and wait-free ring buffer.
+ *
+ * This data structure allows producing data from one thread, and consuming it on
+ * another thread, safely and without explicit synchronization. If used on two
+ * threads, this data structure uses atomics for thread safety. It is possible
+ * to disable the use of atomics at compile time and only use this data
+ * structure on one thread.
+ *
+ * The role for the producer and the consumer must be constant, i.e., the
+ * producer should always be on one thread and the consumer should always be on
+ * another thread.
+ *
+ * Some words about the inner workings of this class:
+ * - Capacity is fixed. Only one allocation is performed, in the constructor.
+ *   When reading and writing, the return value of the method allows checking if
+ *   the ring buffer is empty or full.
+ * - We always keep the read index at least one element ahead of the write
+ *   index, so we can distinguish between an empty and a full ring buffer: an
+ *   empty ring buffer is when the write index is at the same position as the
+ *   read index. A full buffer is when the write index is exactly one position
+ *   before the read index.
+ * - We synchronize updates to the read index after having read the data, and
+ *   the write index after having written the data. This means that the each
+ *   thread can only touch a portion of the buffer that is not touched by the
+ *   other thread.
+ * - Callers are expected to provide buffers. When writing to the queue,
+ *   elements are copied into the internal storage from the buffer passed in.
+ *   When reading from the queue, the user is expected to provide a buffer.
+ *   Because this is a ring buffer, data might not be contiguous in memory,
+ *   providing an external buffer to copy into is an easy way to have linear
+ *   data for further processing.
+ */
+template <typename T>
+class ring_buffer_base
+{
+public:
+  /**
+   * Constructor for a ring buffer.
+   *
+   * This performs an allocation, but is the only allocation that will happen
+   * for the life time of a `ring_buffer_base`.
+   *
+   * @param capacity The maximum number of element this ring buffer will hold.
+   */
+  ring_buffer_base(int capacity)
+    /* One more element to distinguish from empty and full buffer. */
+    : capacity_(capacity + 1)
+  {
+    assert(storage_capacity() <
+           std::numeric_limits<int>::max() / 2 &&
+           "buffer too large for the type of index used.");
+    assert(capacity_ > 0);
+
+    data_.reset(new T[storage_capacity()]);
+    /* If this queue is using atomics, initializing those members as the last
+     * action in the constructor acts as a full barrier, and allow capacity() to
+     * be thread-safe. */
+    write_index_ = 0;
+    read_index_ = 0;
+  }
+  /**
+   * Push `count` zero or default constructed elements in the array.
+   *
+   * Only safely called on the producer thread.
+   *
+   * @param count The number of elements to enqueue.
+   * @return The number of element enqueued.
+   */
+  int enqueue_default(int count)
+  {
+    return enqueue(nullptr, count);
+  }
+  /**
+   * @brief Put an element in the queue
+   *
+   * Only safely called on the producer thread.
+   *
+   * @param element The element to put in the queue.
+   *
+   * @return 1 if the element was inserted, 0 otherwise.
+   */
+  int enqueue(T& element)
+  {
+    return enqueue(&element, 1);
+  }
+  /**
+   * Push `count` elements in the ring buffer.
+   *
+   * Only safely called on the producer thread.
+   *
+   * @param elements a pointer to a buffer containing at least `count` elements.
+   * If `elements` is nullptr, zero or default constructed elements are enqueued.
+   * @param count The number of elements to read from `elements`
+   * @return The number of elements successfully coped from `elements` and inserted
+   * into the ring buffer.
+   */
+  int enqueue(T * elements, int count)
+  {
+#ifndef NDEBUG
+    assert_correct_thread(producer_id);
+#endif
+
+    int rd_idx = read_index_.load(std::memory_order::memory_order_relaxed);
+    int wr_idx = write_index_.load(std::memory_order::memory_order_relaxed);
+
+    if (full_internal(rd_idx, wr_idx)) {
+      return 0;
+    }
+
+    int to_write =
+      std::min(available_write_internal(rd_idx, wr_idx), count);
+
+    /* First part, from the write index to the end of the array. */
+    int first_part = std::min(storage_capacity() - wr_idx,
+                                          to_write);
+    /* Second part, from the beginning of the array */
+    int second_part = to_write - first_part;
+
+    if (elements) {
+      Copy(data_.get() + wr_idx, elements, first_part);
+      Copy(data_.get(), elements + first_part, second_part);
+    } else {
+      ConstructDefault(data_.get() + wr_idx, first_part);
+      ConstructDefault(data_.get(), second_part);
+    }
+
+    write_index_.store(increment_index(wr_idx, to_write), std::memory_order::memory_order_release);
+
+    return to_write;
+  }
+  /**
+   * Retrieve at most `count` elements from the ring buffer, and copy them to
+   * `elements`, if non-null.
+   *
+   * Only safely called on the consumer side.
+   *
+   * @param elements A pointer to a buffer with space for at least `count`
+   * elements. If `elements` is `nullptr`, `count` element will be discarded.
+   * @param count The maximum number of elements to dequeue.
+   * @return The number of elements written to `elements`.
+   */
+  int dequeue(T * elements, int count)
+  {
+#ifndef NDEBUG
+    assert_correct_thread(consumer_id);
+#endif
+
+    int wr_idx = write_index_.load(std::memory_order::memory_order_acquire);
+    int rd_idx = read_index_.load(std::memory_order::memory_order_relaxed);
+
+    if (empty_internal(rd_idx, wr_idx)) {
+      return 0;
+    }
+
+    int to_read =
+      std::min(available_read_internal(rd_idx, wr_idx), count);
+
+    int first_part = std::min(storage_capacity() - rd_idx, to_read);
+    int second_part = to_read - first_part;
+
+    if (elements) {
+      Copy(elements, data_.get() + rd_idx, first_part);
+      Copy(elements + first_part, data_.get(), second_part);
+    }
+
+    read_index_.store(increment_index(rd_idx, to_read), std::memory_order::memory_order_relaxed);
+
+    return to_read;
+  }
+  /**
+   * Get the number of available element for consuming.
+   *
+   * Only safely called on the consumer thread.
+   *
+   * @return The number of available elements for reading.
+   */
+  int available_read() const
+  {
+#ifndef NDEBUG
+    assert_correct_thread(consumer_id);
+#endif
+    return available_read_internal(read_index_.load(std::memory_order::memory_order_relaxed),
+                                   write_index_.load(std::memory_order::memory_order_relaxed));
+  }
+  /**
+   * Get the number of available elements for consuming.
+   *
+   * Only safely called on the producer thread.
+   *
+   * @return The number of empty slots in the buffer, available for writing.
+   */
+  int available_write() const
+  {
+#ifndef NDEBUG
+    assert_correct_thread(producer_id);
+#endif
+    return available_write_internal(read_index_.load(std::memory_order::memory_order_relaxed),
+                                    write_index_.load(std::memory_order::memory_order_relaxed));
+  }
+  /**
+   * Get the total capacity, for this ring buffer.
+   *
+   * Can be called safely on any thread.
+   *
+   * @return The maximum capacity of this ring buffer.
+   */
+  int capacity() const
+  {
+    return storage_capacity() - 1;
+  }
+  /**
+   * Reset the consumer and producer thread identifier, in case the thread are
+   * being changed. This has to be externally synchronized. This is no-op when
+   * asserts are disabled.
+   */
+  void reset_thread_ids()
+  {
+#ifndef NDEBUG
+    consumer_id = producer_id = std::thread::id();
+#endif
+  }
+private:
+  /** Return true if the ring buffer is empty.
+   *
+   * @param read_index the read index to consider
+   * @param write_index the write index to consider
+   * @return true if the ring buffer is empty, false otherwise.
+   **/
+  bool empty_internal(int read_index,
+                      int write_index) const
+  {
+    return write_index == read_index;
+  }
+  /** Return true if the ring buffer is full.
+   *
+   * This happens if the write index is exactly one element behind the read
+   * index.
+   *
+   * @param read_index the read index to consider
+   * @param write_index the write index to consider
+   * @return true if the ring buffer is full, false otherwise.
+   **/
+  bool full_internal(int read_index,
+                     int write_index) const
+  {
+    return (write_index + 1) % storage_capacity() == read_index;
+  }
+  /**
+   * Return the size of the storage. It is one more than the number of elements
+   * that can be stored in the buffer.
+   *
+   * @return the number of elements that can be stored in the buffer.
+   */
+  int storage_capacity() const
+  {
+    return capacity_;
+  }
+  /**
+   * Returns the number of elements available for reading.
+   *
+   * @return the number of available elements for reading.
+   */
+  int
+  available_read_internal(int read_index,
+                          int write_index) const
+  {
+    if (write_index >= read_index) {
+      return write_index - read_index;
+    } else {
+      return write_index + storage_capacity() - read_index;
+    }
+  }
+  /**
+   * Returns the number of empty elements, available for writing.
+   *
+   * @return the number of elements that can be written into the array.
+   */
+  int
+  available_write_internal(int read_index,
+                           int write_index) const
+  {
+    /* We substract one element here to always keep at least one sample
+     * free in the buffer, to distinguish between full and empty array. */
+    int rv = read_index - write_index - 1;
+    if (write_index >= read_index) {
+      rv += storage_capacity();
+    }
+    return rv;
+  }
+  /**
+   * Increments an index, wrapping it around the storage.
+   *
+   * @param index a reference to the index to increment.
+   * @param increment the number by which `index` is incremented.
+   * @return the new index.
+   */
+  int
+  increment_index(int index, int increment) const
+  {
+    assert(increment >= 0);
+    return (index + increment) % storage_capacity();
+  }
+  /**
+   * @brief This allows checking that enqueue (resp. dequeue) are always called
+   * by the right thread.
+   *
+   * @param id the id of the thread that has called the calling method first.
+   */
+#ifndef NDEBUG
+  static void assert_correct_thread(std::thread::id& id)
+  {
+    if (id == std::thread::id()) {
+      id = std::this_thread::get_id();
+      return;
+    }
+    assert(id == std::this_thread::get_id());
+  }
+#endif
+  /** Index at which the oldest element is at, in samples. */
+  std::atomic<int> read_index_;
+  /** Index at which to write new elements. `write_index` is always at
+   * least one element ahead of `read_index_`. */
+  std::atomic<int> write_index_;
+  /** Maximum number of elements that can be stored in the ring buffer. */
+  const int capacity_;
+  /** Data storage */
+  std::unique_ptr<T[]> data_;
+#ifndef NDEBUG
+  /** The id of the only thread that is allowed to read from the queue. */
+  mutable std::thread::id consumer_id;
+  /** The id of the only thread that is allowed to write from the queue. */
+  mutable std::thread::id producer_id;
+#endif
+};
+
+/**
+ * Adapter for `ring_buffer_base` that exposes an interface in frames.
+ */
+template <typename T>
+class audio_ring_buffer_base
+{
+public:
+  /**
+   * @brief Constructor.
+   *
+   * @param channel_count       Number of channels.
+   * @param capacity_in_frames  The capacity in frames.
+   */
+  audio_ring_buffer_base(int channel_count, int capacity_in_frames)
+    : channel_count(channel_count)
+    , ring_buffer(frames_to_samples(capacity_in_frames))
+  {
+    assert(channel_count > 0);
+  }
+  /**
+   * @brief Enqueue silence.
+   *
+   * Only safely called on the producer thread.
+   *
+   * @param frame_count The number of frames of silence to enqueue.
+   * @return  The number of frames of silence actually written to the queue.
+   */
+  int enqueue_default(int frame_count)
+  {
+    return samples_to_frames(ring_buffer.enqueue(nullptr, frames_to_samples(frame_count)));
+  }
+  /**
+   * @brief Enqueue `frames_count` frames of audio.
+   *
+   * Only safely called from the producer thread.
+   *
+   * @param [in] frames If non-null, the frames to enqueue.
+   *                    Otherwise, silent frames are enqueued.
+   * @param frame_count The number of frames to enqueue.
+   *
+   * @return The number of frames enqueued
+   */
+
+  int enqueue(T * frames, int frame_count)
+  {
+    return samples_to_frames(ring_buffer.enqueue(frames, frames_to_samples(frame_count)));
+  }
+
+  /**
+   * @brief Removes `frame_count` frames from the buffer, and
+   *        write them to `frames` if it is non-null.
+   *
+   * Only safely called on the consumer thread.
+   *
+   * @param frames      If non-null, the frames are copied to `frames`.
+   *                    Otherwise, they are dropped.
+   * @param frame_count The number of frames to remove.
+   *
+   * @return  The number of frames actually dequeud.
+   */
+  int dequeue(T * frames, int frame_count)
+  {
+    return samples_to_frames(ring_buffer.dequeue(frames, frames_to_samples(frame_count)));
+  }
+  /**
+   * Get the number of available frames of audio for consuming.
+   *
+   * Only safely called on the consumer thread.
+   *
+   * @return The number of available frames of audio for reading.
+   */
+  int available_read() const
+  {
+    return samples_to_frames(ring_buffer.available_read());
+  }
+  /**
+   * Get the number of available frames of audio for consuming.
+   *
+   * Only safely called on the producer thread.
+   *
+   * @return The number of empty slots in the buffer, available for writing.
+   */
+  int available_write() const
+  {
+    return samples_to_frames(ring_buffer.available_write());
+  }
+  /**
+   * Get the total capacity, for this ring buffer.
+   *
+   * Can be called safely on any thread.
+   *
+   * @return The maximum capacity of this ring buffer.
+   */
+  int capacity() const
+  {
+    return samples_to_frames(ring_buffer.capacity());
+  }
+private:
+  /**
+   * @brief Frames to samples conversion.
+   *
+   * @param frames The number of frames.
+   *
+   * @return  A number of samples.
+   */
+  int frames_to_samples(int frames) const
+  {
+    return frames * channel_count;
+  }
+  /**
+   * @brief Samples to frames conversion.
+   *
+   * @param samples The number of samples.
+   *
+   * @return  A number of frames.
+   */
+  int samples_to_frames(int samples) const
+  {
+    return samples / channel_count;
+  }
+  /** Number of channels of audio that will stream through this ring buffer. */
+  int channel_count;
+  /** The underlying ring buffer that is used to store the data. */
+  ring_buffer_base<T> ring_buffer;
+};
+
+/**
+ * Lock-free instantiation of the `ring_buffer_base` type. This is safe to use
+ * from two threads, one producer, one consumer (that never change role),
+ * without explicit synchronization.
+ */
+template<typename T>
+using lock_free_queue = ring_buffer_base<T>;
+/**
+ * Lock-free instantiation of the `audio_ring_buffer` type. This is safe to use
+ * from two threads, one producer, one consumer (that never change role),
+ * without explicit synchronization.
+ */
+template<typename T>
+using lock_free_audio_ring_buffer = audio_ring_buffer_base<T>;
+
+#endif // CUBEB_RING_BUFFER_H

dep/cubeb/src/cubeb_sndio.c

@@ -0,0 +1,669 @@
+/*
+ * Copyright (c) 2011 Alexandre Ratchov <alex@caoua.org>
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#include <inttypes.h>
+#include <math.h>
+#include <poll.h>
+#include <pthread.h>
+#include <sndio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <dlfcn.h>
+#include <assert.h>
+#include "cubeb/cubeb.h"
+#include "cubeb-internal.h"
+
+#if defined(CUBEB_SNDIO_DEBUG)
+#define DPR(...) fprintf(stderr, __VA_ARGS__);
+#else
+#define DPR(...) do {} while(0)
+#endif
+
+#ifdef DISABLE_LIBSNDIO_DLOPEN
+#define WRAP(x) x
+#else
+#define WRAP(x) cubeb_##x
+#define LIBSNDIO_API_VISIT(X)                   \
+  X(sio_close)                               \
+  X(sio_eof)                                 \
+  X(sio_getpar)                              \
+  X(sio_initpar)                             \
+  X(sio_nfds)                                \
+  X(sio_onmove)                              \
+  X(sio_open)                                \
+  X(sio_pollfd)                              \
+  X(sio_read)                                \
+  X(sio_revents)                             \
+  X(sio_setpar)                              \
+  X(sio_start)                               \
+  X(sio_stop)                                \
+  X(sio_write)                               \
+
+#define MAKE_TYPEDEF(x) static typeof(x) * cubeb_##x;
+LIBSNDIO_API_VISIT(MAKE_TYPEDEF);
+#undef MAKE_TYPEDEF
+#endif
+
+static struct cubeb_ops const sndio_ops;
+
+struct cubeb {
+  struct cubeb_ops const * ops;
+  void * libsndio;
+};
+
+struct cubeb_stream {
+  /* Note: Must match cubeb_stream layout in cubeb.c. */
+  cubeb * context;
+  void * arg;                     /* user arg to {data,state}_cb */
+  /**/
+  pthread_t th;                   /* to run real-time audio i/o */
+  pthread_mutex_t mtx;            /* protects hdl and pos */
+  struct sio_hdl *hdl;            /* link us to sndio */
+  int mode;			  /* bitmap of SIO_{PLAY,REC} */
+  int active;                     /* cubec_start() called */
+  int conv;                       /* need float->s16 conversion */
+  unsigned char *rbuf;            /* rec data consumed from here */
+  unsigned char *pbuf;            /* play data is prepared here */
+  unsigned int nfr;               /* number of frames in ibuf and obuf */
+  unsigned int rbpf;              /* rec bytes per frame */
+  unsigned int pbpf;              /* play bytes per frame */
+  unsigned int rchan;             /* number of rec channels */
+  unsigned int pchan;             /* number of play channels */
+  unsigned int nblks;		  /* number of blocks in the buffer */
+  uint64_t hwpos;                 /* frame number Joe hears right now */
+  uint64_t swpos;                 /* number of frames produced/consumed */
+  cubeb_data_callback data_cb;    /* cb to preapare data */
+  cubeb_state_callback state_cb;  /* cb to notify about state changes */
+  float volume;			  /* current volume */
+};
+
+static void
+s16_setvol(void *ptr, long nsamp, float volume)
+{
+  int16_t *dst = ptr;
+  int32_t mult = volume * 32768;
+  int32_t s;
+
+  while (nsamp-- > 0) {
+    s = *dst;
+    s = (s * mult) >> 15;
+    *(dst++) = s;
+  }
+}
+
+static void
+float_to_s16(void *ptr, long nsamp, float volume)
+{
+  int16_t *dst = ptr;
+  float *src = ptr;
+  float mult = volume * 32768;
+  int s;
+
+  while (nsamp-- > 0) {
+    s = lrintf(*(src++) * mult);
+    if (s < -32768)
+      s = -32768;
+    else if (s > 32767)
+      s = 32767;
+    *(dst++) = s;
+  }
+}
+
+static void
+s16_to_float(void *ptr, long nsamp)
+{
+  int16_t *src = ptr;
+  float *dst = ptr;
+
+  src += nsamp;
+  dst += nsamp;
+  while (nsamp-- > 0)
+    *(--dst) = (1. / 32768) * *(--src);
+}
+
+static const char *
+sndio_get_device()
+{
+#ifndef __OpenBSD__
+  /*
+   * On other platforms default to sndio devices,
+   * so cubebs other backends can be used instead.
+   */
+  const char *dev = getenv("AUDIODEVICE");
+  if (dev == NULL || *dev == '\0')
+	return "snd/0";
+  return dev;
+#else
+  return SIO_DEVANY;
+#endif
+}
+
+static void
+sndio_onmove(void *arg, int delta)
+{
+  cubeb_stream *s = (cubeb_stream *)arg;
+
+  s->hwpos += delta;
+}
+
+static void *
+sndio_mainloop(void *arg)
+{
+  struct pollfd *pfds;
+  cubeb_stream *s = arg;
+  int n, eof = 0, prime, nfds, events, revents, state = CUBEB_STATE_STARTED;
+  size_t pstart = 0, pend = 0, rstart = 0, rend = 0;
+  long nfr;
+
+  nfds = WRAP(sio_nfds)(s->hdl);
+  pfds = calloc(nfds, sizeof (struct pollfd));
+  if (pfds == NULL)
+	  return NULL;
+
+  DPR("sndio_mainloop()\n");
+  s->state_cb(s, s->arg, CUBEB_STATE_STARTED);
+  pthread_mutex_lock(&s->mtx);
+  if (!WRAP(sio_start)(s->hdl)) {
+    pthread_mutex_unlock(&s->mtx);
+    free(pfds);
+    return NULL;
+  }
+  DPR("sndio_mainloop(), started\n");
+
+  if (s->mode & SIO_PLAY) {
+    pstart = pend = s->nfr * s->pbpf;
+    prime = s->nblks;
+    if (s->mode & SIO_REC) {
+      memset(s->rbuf, 0, s->nfr * s->rbpf);
+      rstart = rend = s->nfr * s->rbpf;
+    }
+  } else {
+    prime = 0;
+    rstart = 0;
+    rend = s->nfr * s->rbpf;
+  }
+
+  for (;;) {
+    if (!s->active) {
+      DPR("sndio_mainloop() stopped\n");
+      state = CUBEB_STATE_STOPPED;
+      break;
+    }
+
+    /* do we have a complete block? */
+    if ((!(s->mode & SIO_PLAY) || pstart == pend) &&
+	(!(s->mode & SIO_REC) || rstart == rend)) {
+
+      if (eof) {
+        DPR("sndio_mainloop() drained\n");
+        state = CUBEB_STATE_DRAINED;
+        break;
+      }
+
+      if ((s->mode & SIO_REC) && s->conv)
+        s16_to_float(s->rbuf, s->nfr * s->rchan);
+
+      /* invoke call-back, it returns less that s->nfr if done */
+      pthread_mutex_unlock(&s->mtx);
+      nfr = s->data_cb(s, s->arg, s->rbuf, s->pbuf, s->nfr);
+      pthread_mutex_lock(&s->mtx);
+      if (nfr < 0) {
+        DPR("sndio_mainloop() cb err\n");
+        state = CUBEB_STATE_ERROR;
+        break;
+      }
+      s->swpos += nfr;
+
+      /* was this last call-back invocation (aka end-of-stream) ? */
+      if (nfr < s->nfr) {
+
+        if (!(s->mode & SIO_PLAY) || nfr == 0) {
+          state = CUBEB_STATE_DRAINED;
+          break;
+	}
+
+        /* need to write (aka drain) the partial play block we got */
+        pend = nfr * s->pbpf;
+        eof = 1;
+      }
+
+      if (prime > 0)
+        prime--;
+
+      if (s->mode & SIO_PLAY) {
+        if (s->conv)
+          float_to_s16(s->pbuf, nfr * s->pchan, s->volume);
+        else
+          s16_setvol(s->pbuf, nfr * s->pchan, s->volume);
+      }
+
+      if (s->mode & SIO_REC)
+        rstart = 0;
+      if (s->mode & SIO_PLAY)
+        pstart = 0;
+    }
+
+    events = 0;
+    if ((s->mode & SIO_REC) && rstart < rend && prime == 0)
+      events |= POLLIN;
+    if ((s->mode & SIO_PLAY) && pstart < pend)
+      events |= POLLOUT;
+    nfds = WRAP(sio_pollfd)(s->hdl, pfds, events);
+
+    if (nfds > 0) {
+      pthread_mutex_unlock(&s->mtx);
+      n = poll(pfds, nfds, -1);
+      pthread_mutex_lock(&s->mtx);
+      if (n < 0)
+        continue;
+    }
+
+    revents = WRAP(sio_revents)(s->hdl, pfds);
+
+    if (revents & POLLHUP) {
+      state = CUBEB_STATE_ERROR;
+      break;
+    }
+
+    if (revents & POLLOUT) {
+      n = WRAP(sio_write)(s->hdl, s->pbuf + pstart, pend - pstart);
+      if (n == 0 && WRAP(sio_eof)(s->hdl)) {
+        DPR("sndio_mainloop() werr\n");
+        state = CUBEB_STATE_ERROR;
+        break;
+      }
+      pstart += n;
+    }
+
+    if (revents & POLLIN) {
+      n = WRAP(sio_read)(s->hdl, s->rbuf + rstart, rend - rstart);
+      if (n == 0 && WRAP(sio_eof)(s->hdl)) {
+        DPR("sndio_mainloop() rerr\n");
+        state = CUBEB_STATE_ERROR;
+        break;
+      }
+      rstart += n;
+    }
+
+    /* skip rec block, if not recording (yet) */
+    if (prime > 0 && (s->mode & SIO_REC))
+      rstart = rend;
+  }
+  WRAP(sio_stop)(s->hdl);
+  s->hwpos = s->swpos;
+  pthread_mutex_unlock(&s->mtx);
+  s->state_cb(s, s->arg, state);
+  free(pfds);
+  return NULL;
+}
+
+/*static*/ int
+sndio_init(cubeb **context, char const *context_name)
+{
+  void * libsndio = NULL;
+  struct sio_hdl *hdl;
+
+  assert(context);
+
+#ifndef DISABLE_LIBSNDIO_DLOPEN
+  libsndio = dlopen("libsndio.so.7.0", RTLD_LAZY);
+  if (!libsndio) {
+    libsndio = dlopen("libsndio.so", RTLD_LAZY);
+    if (!libsndio) {
+      DPR("sndio_init(%s) failed dlopen(libsndio.so)\n", context_name);
+      return CUBEB_ERROR;
+    }
+  }
+
+#define LOAD(x) {                               \
+    cubeb_##x = dlsym(libsndio, #x);            \
+    if (!cubeb_##x) {                           \
+      DPR("sndio_init(%s) failed dlsym(%s)\n", context_name, #x); \
+      dlclose(libsndio);                        \
+      return CUBEB_ERROR;                       \
+    }                                           \
+  }
+
+  LIBSNDIO_API_VISIT(LOAD);
+#undef LOAD
+#endif
+
+  /* test if sndio works */
+  hdl = WRAP(sio_open)(sndio_get_device(), SIO_PLAY, 1);
+  if (hdl == NULL) {
+    return CUBEB_ERROR;
+  }
+  WRAP(sio_close)(hdl);
+
+  DPR("sndio_init(%s)\n", context_name);
+  *context = malloc(sizeof(**context));
+  if (*context == NULL)
+	return CUBEB_ERROR;
+  (*context)->libsndio = libsndio;
+  (*context)->ops = &sndio_ops;
+  (void)context_name;
+  return CUBEB_OK;
+}
+
+static char const *
+sndio_get_backend_id(cubeb *context)
+{
+  return "sndio";
+}
+
+static void
+sndio_destroy(cubeb *context)
+{
+  DPR("sndio_destroy()\n");
+  if (context->libsndio)
+    dlclose(context->libsndio);
+  free(context);
+}
+
+static int
+sndio_stream_init(cubeb * context,
+                  cubeb_stream ** stream,
+                  char const * stream_name,
+                  cubeb_devid input_device,
+                  cubeb_stream_params * input_stream_params,
+                  cubeb_devid output_device,
+                  cubeb_stream_params * output_stream_params,
+                  unsigned int latency_frames,
+                  cubeb_data_callback data_callback,
+                  cubeb_state_callback state_callback,
+                  void *user_ptr)
+{
+  cubeb_stream *s;
+  struct sio_par wpar, rpar;
+  cubeb_sample_format format;
+  int rate;
+  size_t bps;
+
+  DPR("sndio_stream_init(%s)\n", stream_name);
+
+  s = malloc(sizeof(cubeb_stream));
+  if (s == NULL)
+    return CUBEB_ERROR;
+  memset(s, 0, sizeof(cubeb_stream));
+  s->mode = 0;
+  if (input_stream_params) {
+    if (input_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK) {
+      DPR("sndio_stream_init(), loopback not supported\n");
+      goto err;
+    }
+    s->mode |= SIO_REC;
+    format = input_stream_params->format;
+    rate = input_stream_params->rate;
+  }
+  if (output_stream_params) {
+    if (output_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK) {
+      DPR("sndio_stream_init(), loopback not supported\n");
+      goto err;
+    }
+    s->mode |= SIO_PLAY;
+    format = output_stream_params->format;
+    rate = output_stream_params->rate;
+  }
+  if (s->mode == 0) {
+    DPR("sndio_stream_init(), neither playing nor recording\n");
+    goto err;
+  }
+  s->context = context;
+  s->hdl = WRAP(sio_open)(sndio_get_device(), s->mode, 1);
+  if (s->hdl == NULL) {
+    DPR("sndio_stream_init(), sio_open() failed\n");
+    goto err;
+  }
+  WRAP(sio_initpar)(&wpar);
+  wpar.sig = 1;
+  wpar.bits = 16;
+  switch (format) {
+  case CUBEB_SAMPLE_S16LE:
+    wpar.le = 1;
+    break;
+  case CUBEB_SAMPLE_S16BE:
+    wpar.le = 0;
+    break;
+  case CUBEB_SAMPLE_FLOAT32NE:
+    wpar.le = SIO_LE_NATIVE;
+    break;
+  default:
+    DPR("sndio_stream_init() unsupported format\n");
+    goto err;
+  }
+  wpar.rate = rate;
+  if (s->mode & SIO_REC)
+    wpar.rchan = input_stream_params->channels;
+  if (s->mode & SIO_PLAY)
+    wpar.pchan = output_stream_params->channels;
+  wpar.appbufsz = latency_frames;
+  if (!WRAP(sio_setpar)(s->hdl, &wpar) || !WRAP(sio_getpar)(s->hdl, &rpar)) {
+    DPR("sndio_stream_init(), sio_setpar() failed\n");
+    goto err;
+  }
+  if (rpar.bits != wpar.bits || rpar.le != wpar.le ||
+      rpar.sig != wpar.sig || rpar.rate != wpar.rate ||
+      ((s->mode & SIO_REC) && rpar.rchan != wpar.rchan) ||
+      ((s->mode & SIO_PLAY) && rpar.pchan != wpar.pchan)) {
+    DPR("sndio_stream_init() unsupported params\n");
+    goto err;
+  }
+  WRAP(sio_onmove)(s->hdl, sndio_onmove, s);
+  s->active = 0;
+  s->nfr = rpar.round;
+  s->rbpf = rpar.bps * rpar.rchan;
+  s->pbpf = rpar.bps * rpar.pchan;
+  s->rchan = rpar.rchan;
+  s->pchan = rpar.pchan;
+  s->nblks = rpar.bufsz / rpar.round;
+  s->data_cb = data_callback;
+  s->state_cb = state_callback;
+  s->arg = user_ptr;
+  s->mtx = (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER;
+  s->hwpos = s->swpos = 0;
+  if (format == CUBEB_SAMPLE_FLOAT32LE) {
+    s->conv = 1;
+    bps = sizeof(float);
+  } else {
+    s->conv = 0;
+    bps = rpar.bps;
+  }
+  if (s->mode & SIO_PLAY) {
+    s->pbuf = malloc(bps * rpar.pchan * rpar.round);
+    if (s->pbuf == NULL)
+      goto err;
+  }
+  if (s->mode & SIO_REC) {
+    s->rbuf = malloc(bps * rpar.rchan * rpar.round);
+    if (s->rbuf == NULL)
+      goto err;
+  }
+  s->volume = 1.;
+  *stream = s;
+  DPR("sndio_stream_init() end, ok\n");
+  (void)context;
+  (void)stream_name;
+  return CUBEB_OK;
+err:
+  if (s->hdl)
+    WRAP(sio_close)(s->hdl);
+  if (s->pbuf)
+    free(s->pbuf);
+  if (s->rbuf)
+    free(s->pbuf);
+  free(s);
+  return CUBEB_ERROR;
+}
+
+static int
+sndio_get_max_channel_count(cubeb * ctx, uint32_t * max_channels)
+{
+  assert(ctx && max_channels);
+
+  *max_channels = 8;
+
+  return CUBEB_OK;
+}
+
+static int
+sndio_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate)
+{
+  /*
+   * We've no device-independent prefered rate; any rate will work if
+   * sndiod is running. If it isn't, 48kHz is what is most likely to
+   * work as most (but not all) devices support it.
+   */
+  *rate = 48000;
+  return CUBEB_OK;
+}
+
+static int
+sndio_get_min_latency(cubeb * ctx, cubeb_stream_params params, uint32_t * latency_frames)
+{
+  /*
+   * We've no device-independent minimum latency.
+   */
+  *latency_frames = 2048;
+
+  return CUBEB_OK;
+}
+
+static void
+sndio_stream_destroy(cubeb_stream *s)
+{
+  DPR("sndio_stream_destroy()\n");
+  WRAP(sio_close)(s->hdl);
+  if (s->mode & SIO_PLAY)
+    free(s->pbuf);
+  if (s->mode & SIO_REC)
+    free(s->rbuf);
+  free(s);
+}
+
+static int
+sndio_stream_start(cubeb_stream *s)
+{
+  int err;
+
+  DPR("sndio_stream_start()\n");
+  s->active = 1;
+  err = pthread_create(&s->th, NULL, sndio_mainloop, s);
+  if (err) {
+    s->active = 0;
+    return CUBEB_ERROR;
+  }
+  return CUBEB_OK;
+}
+
+static int
+sndio_stream_stop(cubeb_stream *s)
+{
+  void *dummy;
+
+  DPR("sndio_stream_stop()\n");
+  if (s->active) {
+    s->active = 0;
+    pthread_join(s->th, &dummy);
+  }
+  return CUBEB_OK;
+}
+
+static int
+sndio_stream_get_position(cubeb_stream *s, uint64_t *p)
+{
+  pthread_mutex_lock(&s->mtx);
+  DPR("sndio_stream_get_position() %" PRId64 "\n", s->hwpos);
+  *p = s->hwpos;
+  pthread_mutex_unlock(&s->mtx);
+  return CUBEB_OK;
+}
+
+static int
+sndio_stream_set_volume(cubeb_stream *s, float volume)
+{
+  DPR("sndio_stream_set_volume(%f)\n", volume);
+  pthread_mutex_lock(&s->mtx);
+  if (volume < 0.)
+    volume = 0.;
+  else if (volume > 1.0)
+    volume = 1.;
+  s->volume = volume;
+  pthread_mutex_unlock(&s->mtx);
+  return CUBEB_OK;
+}
+
+int
+sndio_stream_get_latency(cubeb_stream * stm, uint32_t * latency)
+{
+  // http://www.openbsd.org/cgi-bin/man.cgi?query=sio_open
+  // in the "Measuring the latency and buffers usage" paragraph.
+  *latency = stm->swpos - stm->hwpos;
+  return CUBEB_OK;
+}
+
+static int
+sndio_enumerate_devices(cubeb *context, cubeb_device_type type,
+	cubeb_device_collection *collection)
+{
+  static char dev[] = SIO_DEVANY;
+  cubeb_device_info *device;
+
+  device = malloc(sizeof(cubeb_device_info));
+  if (device == NULL)
+    return CUBEB_ERROR;
+
+  device->devid = dev;		/* passed to stream_init() */
+  device->device_id = dev;	/* printable in UI */
+  device->friendly_name = dev;	/* same, but friendly */
+  device->group_id = dev;	/* actual device if full-duplex */
+  device->vendor_name = NULL;   /* may be NULL */
+  device->type = type;		/* Input/Output */
+  device->state = CUBEB_DEVICE_STATE_ENABLED;
+  device->preferred = CUBEB_DEVICE_PREF_ALL;
+  device->format = CUBEB_DEVICE_FMT_S16NE;
+  device->default_format = CUBEB_DEVICE_FMT_S16NE;
+  device->max_channels = 16;
+  device->default_rate = 48000;
+  device->min_rate = 4000;
+  device->max_rate = 192000;
+  device->latency_lo = 480;
+  device->latency_hi = 9600;
+  collection->device = device;
+  collection->count = 1;
+  return CUBEB_OK;
+}
+
+static int
+sndio_device_collection_destroy(cubeb * context,
+	cubeb_device_collection * collection)
+{
+  free(collection->device);
+  return CUBEB_OK;
+}
+
+static struct cubeb_ops const sndio_ops = {
+  .init = sndio_init,
+  .get_backend_id = sndio_get_backend_id,
+  .get_max_channel_count = sndio_get_max_channel_count,
+  .get_min_latency = sndio_get_min_latency,
+  .get_preferred_sample_rate = sndio_get_preferred_sample_rate,
+  .enumerate_devices = sndio_enumerate_devices,
+  .device_collection_destroy = sndio_device_collection_destroy,
+  .destroy = sndio_destroy,
+  .stream_init = sndio_stream_init,
+  .stream_destroy = sndio_stream_destroy,
+  .stream_start = sndio_stream_start,
+  .stream_stop = sndio_stream_stop,
+  .stream_reset_default_device = NULL,
+  .stream_get_position = sndio_stream_get_position,
+  .stream_get_latency = sndio_stream_get_latency,
+  .stream_set_volume = sndio_stream_set_volume,
+  .stream_get_current_device = NULL,
+  .stream_device_destroy = NULL,
+  .stream_register_device_changed_callback = NULL,
+  .register_device_collection_changed = NULL
+};

dep/cubeb/src/cubeb_strings.c

@@ -0,0 +1,155 @@
+/*
+ * Copyright © 2011 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#include "cubeb_strings.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define CUBEB_STRINGS_INLINE_COUNT 4
+
+struct cubeb_strings {
+  uint32_t size;
+  uint32_t count;
+  char ** data;
+  char * small_store[CUBEB_STRINGS_INLINE_COUNT];
+};
+
+int
+cubeb_strings_init(cubeb_strings ** strings)
+{
+  cubeb_strings* strs = NULL;
+
+  if (!strings) {
+    return CUBEB_ERROR;
+  }
+
+  strs = calloc(1, sizeof(cubeb_strings));
+  assert(strs);
+
+  if (!strs) {
+    return CUBEB_ERROR;
+  }
+
+  strs->size = sizeof(strs->small_store) / sizeof(strs->small_store[0]);
+  strs->count = 0;
+  strs->data = strs->small_store;
+
+  *strings = strs;
+
+  return CUBEB_OK;
+}
+
+void
+cubeb_strings_destroy(cubeb_strings * strings)
+{
+  char ** sp = NULL;
+  char ** se = NULL;
+
+  if (!strings) {
+    return;
+  }
+
+  sp = strings->data;
+  se = sp + strings->count;
+
+  for ( ;  sp != se; sp++) {
+    if (*sp) {
+      free(*sp);
+    }
+  }
+
+  if (strings->data != strings->small_store) {
+    free(strings->data);
+  }
+
+  free(strings);
+}
+
+/** Look for string in string storage.
+    @param strings Opaque pointer to interned string storage.
+    @param s String to look up.
+    @retval Read-only string or NULL if not found. */
+static char const *
+cubeb_strings_lookup(cubeb_strings * strings, char const * s)
+{
+  char ** sp = NULL;
+  char ** se = NULL;
+
+  if (!strings || !s) {
+    return NULL;
+  }
+
+  sp = strings->data;
+  se = sp + strings->count;
+
+  for ( ; sp != se; sp++) {
+    if (*sp && strcmp(*sp, s) == 0) {
+      return *sp;
+    }
+  }
+
+  return NULL;
+}
+
+static char const *
+cubeb_strings_push(cubeb_strings * strings, char const * s)
+{
+  char * is = NULL;
+
+  if (strings->count == strings->size) {
+    char ** new_data;
+    uint32_t value_size = sizeof(char const *);
+    uint32_t new_size = strings->size * 2;
+    if (!new_size || value_size > (uint32_t)-1 / new_size) {
+      // overflow
+      return NULL;
+    }
+
+    if (strings->small_store == strings->data) {
+      // First time heap allocation.
+      new_data = malloc(new_size * value_size);
+      if (new_data) {
+        memcpy(new_data, strings->small_store, sizeof(strings->small_store));
+      }
+    } else {
+      new_data = realloc(strings->data, new_size * value_size);
+    }
+
+    if (!new_data) {
+      // out of memory
+      return NULL;
+    }
+
+    strings->size = new_size;
+    strings->data = new_data;
+  }
+
+  is = strdup(s);
+  strings->data[strings->count++] = is;
+
+  return is;
+}
+
+char const *
+cubeb_strings_intern(cubeb_strings * strings, char const * s)
+{
+  char const * is = NULL;
+
+  if (!strings || !s) {
+    return NULL;
+  }
+
+  is = cubeb_strings_lookup(strings, s);
+  if (is) {
+    return is;
+  }
+
+  return cubeb_strings_push(strings, s);
+}
+

dep/cubeb/src/cubeb_strings.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2011 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#ifndef CUBEB_STRINGS_H
+#define CUBEB_STRINGS_H
+
+#include "cubeb/cubeb.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/** Opaque handle referencing interned string storage. */
+typedef struct cubeb_strings cubeb_strings;
+
+/** Initialize an interned string structure.
+    @param strings An out param where an opaque pointer to the
+    interned string storage will be returned.
+    @retval CUBEB_OK in case of success.
+    @retval CUBEB_ERROR in case of error. */
+CUBEB_EXPORT int cubeb_strings_init(cubeb_strings ** strings);
+
+/** Destroy an interned string structure freeing all associated memory.
+    @param strings An opaque pointer to the interned string storage to
+                   destroy. */
+CUBEB_EXPORT void cubeb_strings_destroy(cubeb_strings * strings);
+
+/** Add string to internal storage.
+    @param strings Opaque pointer to interned string storage.
+    @param s String to add to storage.
+    @retval CUBEB_OK
+    @retval CUBEB_ERROR
+ */
+CUBEB_EXPORT char const * cubeb_strings_intern(cubeb_strings * strings, char const * s);
+
+#if defined(__cplusplus)
+}
+#endif
+
+#endif // !CUBEB_STRINGS_H

dep/cubeb/src/cubeb_sun.c

@@ -0,0 +1,752 @@
+/*
+ * Copyright © 2019 Nia Alarie
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#include <sys/audioio.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "cubeb/cubeb.h"
+#include "cubeb-internal.h"
+
+#define BYTES_TO_FRAMES(bytes, channels) \
+  (bytes / (channels * sizeof(int16_t)))
+
+#define FRAMES_TO_BYTES(frames, channels) \
+  (frames * (channels * sizeof(int16_t)))
+
+/* Default to 4 + 1 for the default device. */
+#ifndef SUN_DEVICE_COUNT
+#define SUN_DEVICE_COUNT (5)
+#endif
+
+/* Supported well by most hardware. */
+#ifndef SUN_PREFER_RATE
+#define SUN_PREFER_RATE (48000)
+#endif
+
+/* Standard acceptable minimum. */
+#ifndef SUN_LATENCY_MS
+#define SUN_LATENCY_MS (40)
+#endif
+
+#ifndef SUN_DEFAULT_DEVICE
+#define SUN_DEFAULT_DEVICE "/dev/audio"
+#endif
+
+#ifndef SUN_POLL_TIMEOUT
+#define SUN_POLL_TIMEOUT (1000)
+#endif
+
+#ifndef SUN_BUFFER_FRAMES
+#define SUN_BUFFER_FRAMES (32)
+#endif
+
+/*
+ * Supported on NetBSD regardless of hardware.
+ */
+
+#ifndef SUN_MAX_CHANNELS
+# ifdef __NetBSD__
+#  define SUN_MAX_CHANNELS (12)
+# else
+#  define SUN_MAX_CHANNELS (2)
+# endif
+#endif
+
+#ifndef SUN_MIN_RATE
+#define SUN_MIN_RATE (1000)
+#endif
+
+#ifndef SUN_MAX_RATE
+#define SUN_MAX_RATE (192000)
+#endif
+
+static struct cubeb_ops const sun_ops;
+
+struct cubeb {
+  struct cubeb_ops const * ops;
+};
+
+struct cubeb_stream {
+  struct cubeb * context;
+  void * user_ptr;
+  pthread_t thread;
+  pthread_mutex_t mutex; /* protects running, volume, frames_written */
+  int floating;
+  int running;
+  int play_fd;
+  int record_fd;
+  float volume;
+  struct audio_info p_info; /* info for the play fd */
+  struct audio_info r_info; /* info for the record fd */
+  cubeb_data_callback data_cb;
+  cubeb_state_callback state_cb;
+  int16_t * play_buf;
+  int16_t * record_buf;
+  float * f_play_buf;
+  float * f_record_buf;
+  char input_name[32];
+  char output_name[32];
+  uint64_t frames_written;
+  uint64_t blocks_written;
+};
+
+int
+sun_init(cubeb ** context, char const * context_name)
+{
+  cubeb * c;
+
+  (void)context_name;
+  if ((c = calloc(1, sizeof(cubeb))) == NULL) {
+    return CUBEB_ERROR;
+  }
+  c->ops = &sun_ops;
+  *context = c;
+  return CUBEB_OK;
+}
+
+static void
+sun_destroy(cubeb * context)
+{
+  free(context);
+}
+
+static char const *
+sun_get_backend_id(cubeb * context)
+{
+  return "sun";
+}
+
+static int
+sun_get_preferred_sample_rate(cubeb * context, uint32_t * rate)
+{
+  (void)context;
+
+  *rate = SUN_PREFER_RATE;
+  return CUBEB_OK;
+}
+
+static int
+sun_get_max_channel_count(cubeb * context, uint32_t * max_channels)
+{
+  (void)context;
+
+  *max_channels = SUN_MAX_CHANNELS;
+  return CUBEB_OK;
+}
+
+static int
+sun_get_min_latency(cubeb * context, cubeb_stream_params params,
+                    uint32_t * latency_frames)
+{
+  (void)context;
+
+  *latency_frames = SUN_LATENCY_MS * params.rate / 1000;
+  return CUBEB_OK;
+}
+
+static int
+sun_get_hwinfo(const char * device, struct audio_info * format,
+               int * props, struct audio_device * dev)
+{
+  int fd = -1;
+
+  if ((fd = open(device, O_RDONLY)) == -1) {
+    goto error;
+  }
+#ifdef AUDIO_GETFORMAT
+  if (ioctl(fd, AUDIO_GETFORMAT, format) != 0) {
+    goto error;
+  }
+#endif
+#ifdef AUDIO_GETPROPS
+  if (ioctl(fd, AUDIO_GETPROPS, props) != 0) {
+    goto error;
+  }
+#endif
+  if (ioctl(fd, AUDIO_GETDEV, dev) != 0) {
+    goto error;
+  }
+  close(fd);
+  return CUBEB_OK;
+error:
+  if (fd != -1) {
+    close(fd);
+  }
+  return CUBEB_ERROR;
+}
+
+/*
+ * XXX: PR kern/54264
+ */
+static int
+sun_prinfo_verify_sanity(struct audio_prinfo * prinfo)
+{
+   return prinfo->precision >= 8 && prinfo->precision <= 32 &&
+     prinfo->channels >= 1 && prinfo->channels < SUN_MAX_CHANNELS &&
+     prinfo->sample_rate < SUN_MAX_RATE && prinfo->sample_rate > SUN_MIN_RATE;
+}
+
+static int
+sun_enumerate_devices(cubeb * context, cubeb_device_type type,
+                      cubeb_device_collection * collection)
+{
+  unsigned i;
+  cubeb_device_info device = {0};
+  char dev[16] = SUN_DEFAULT_DEVICE;
+  char dev_friendly[64];
+  struct audio_info hwfmt;
+  struct audio_device hwname;
+  struct audio_prinfo *prinfo = NULL;
+  int hwprops;
+
+  collection->device = calloc(SUN_DEVICE_COUNT, sizeof(cubeb_device_info));
+  if (collection->device == NULL) {
+    return CUBEB_ERROR;
+  }
+  collection->count = 0;
+
+  for (i = 0; i < SUN_DEVICE_COUNT; ++i) {
+    if (i > 0) {
+      (void)snprintf(dev, sizeof(dev), "/dev/audio%u", i - 1);
+    }
+    if (sun_get_hwinfo(dev, &hwfmt, &hwprops, &hwname) != CUBEB_OK) {
+      continue;
+    }
+#ifdef AUDIO_GETPROPS
+    device.type = 0;
+    if ((hwprops & AUDIO_PROP_CAPTURE) != 0 &&
+        sun_prinfo_verify_sanity(&hwfmt.record)) {
+      /* the device supports recording, probably */
+      device.type |= CUBEB_DEVICE_TYPE_INPUT;
+    }
+    if ((hwprops & AUDIO_PROP_PLAYBACK) != 0 &&
+        sun_prinfo_verify_sanity(&hwfmt.play)) {
+      /* the device supports playback, probably */
+      device.type |= CUBEB_DEVICE_TYPE_OUTPUT;
+    }
+    switch (device.type) {
+    case 0:
+      /* device doesn't do input or output, aliens probably involved */
+      continue;
+    case CUBEB_DEVICE_TYPE_INPUT:
+      if ((type & CUBEB_DEVICE_TYPE_INPUT) == 0) {
+        /* this device is input only, not scanning for those, skip it */
+        continue;
+      }
+      break;
+    case CUBEB_DEVICE_TYPE_OUTPUT:
+      if ((type & CUBEB_DEVICE_TYPE_OUTPUT) == 0) {
+        /* this device is output only, not scanning for those, skip it */
+        continue;
+      }
+      break;
+    }
+    if ((type & CUBEB_DEVICE_TYPE_INPUT) != 0) {
+      prinfo = &hwfmt.record;
+    }
+    if ((type & CUBEB_DEVICE_TYPE_OUTPUT) != 0) {
+      prinfo = &hwfmt.play;
+    }
+#endif
+    if (i > 0) {
+      (void)snprintf(dev_friendly, sizeof(dev_friendly), "%s %s %s (%d)",
+                     hwname.name, hwname.version, hwname.config, i - 1);
+    } else {
+      (void)snprintf(dev_friendly, sizeof(dev_friendly), "%s %s %s (default)",
+                     hwname.name, hwname.version, hwname.config);
+    }
+    device.devid = (void *)(uintptr_t)i;
+    device.device_id = strdup(dev);
+    device.friendly_name = strdup(dev_friendly);
+    device.group_id = strdup(dev);
+    device.vendor_name = strdup(hwname.name);
+    device.type = type;
+    device.state = CUBEB_DEVICE_STATE_ENABLED;
+    device.preferred = (i == 0) ? CUBEB_DEVICE_PREF_ALL : CUBEB_DEVICE_PREF_NONE;
+#ifdef AUDIO_GETFORMAT
+    device.max_channels = prinfo->channels;
+    device.default_rate = prinfo->sample_rate;
+#else
+    device.max_channels = 2;
+    device.default_rate = SUN_PREFER_RATE;
+#endif
+    device.default_format = CUBEB_DEVICE_FMT_S16NE;
+    device.format = CUBEB_DEVICE_FMT_S16NE;
+    device.min_rate = SUN_MIN_RATE;
+    device.max_rate = SUN_MAX_RATE;
+    device.latency_lo = SUN_LATENCY_MS * SUN_MIN_RATE / 1000;
+    device.latency_hi = SUN_LATENCY_MS * SUN_MAX_RATE / 1000;
+    collection->device[collection->count++] = device;
+  }
+  return CUBEB_OK;
+}
+
+static int
+sun_device_collection_destroy(cubeb * context,
+                              cubeb_device_collection * collection)
+{
+  unsigned i;
+
+  for (i = 0; i < collection->count; ++i) {
+    free((char *)collection->device[i].device_id);
+    free((char *)collection->device[i].friendly_name);
+    free((char *)collection->device[i].group_id);
+    free((char *)collection->device[i].vendor_name);
+  }
+  free(collection->device);
+  return CUBEB_OK;
+}
+
+static int
+sun_copy_params(int fd, cubeb_stream * stream, cubeb_stream_params * params,
+                struct audio_info * info, struct audio_prinfo * prinfo)
+{
+  prinfo->channels = params->channels;
+  prinfo->sample_rate = params->rate;
+  prinfo->precision = 16;
+#ifdef AUDIO_ENCODING_SLINEAR_LE
+  switch (params->format) {
+  case CUBEB_SAMPLE_S16LE:
+    prinfo->encoding = AUDIO_ENCODING_SLINEAR_LE;
+    break;
+  case CUBEB_SAMPLE_S16BE:
+    prinfo->encoding = AUDIO_ENCODING_SLINEAR_BE;
+    break;
+  case CUBEB_SAMPLE_FLOAT32NE:
+    stream->floating = 1;
+    prinfo->encoding = AUDIO_ENCODING_SLINEAR;
+    break;
+  default:
+    LOG("Unsupported format");
+    return CUBEB_ERROR_INVALID_FORMAT;
+  }
+#else
+  switch (params->format) {
+  case CUBEB_SAMPLE_S16NE:
+    prinfo->encoding = AUDIO_ENCODING_LINEAR;
+    break;
+  case CUBEB_SAMPLE_FLOAT32NE:
+    stream->floating = 1;
+    prinfo->encoding = AUDIO_ENCODING_LINEAR;
+    break;
+  default:
+    LOG("Unsupported format");
+    return CUBEB_ERROR_INVALID_FORMAT;
+  }
+#endif
+  if (ioctl(fd, AUDIO_SETINFO, info) == -1) {
+    return CUBEB_ERROR;
+  }
+  if (ioctl(fd, AUDIO_GETINFO, info) == -1) {
+    return CUBEB_ERROR;
+  }
+  return CUBEB_OK;
+}
+
+static int
+sun_stream_stop(cubeb_stream * s)
+{
+  pthread_mutex_lock(&s->mutex);
+  if (s->running) {
+    s->running = 0;
+    pthread_mutex_unlock(&s->mutex);
+    pthread_join(s->thread, NULL);
+  } else {
+    pthread_mutex_unlock(&s->mutex);
+  }
+  return CUBEB_OK;
+}
+
+static void
+sun_stream_destroy(cubeb_stream * s)
+{
+  pthread_mutex_destroy(&s->mutex);
+  sun_stream_stop(s);
+  if (s->play_fd != -1) {
+    close(s->play_fd);
+  }
+  if (s->record_fd != -1) {
+    close(s->record_fd);
+  }
+  free(s->f_play_buf);
+  free(s->f_record_buf);
+  free(s->play_buf);
+  free(s->record_buf);
+  free(s);
+}
+
+static void
+sun_float_to_linear(float * in, int16_t * out,
+                    unsigned channels, long frames, float vol)
+{
+  unsigned i, sample_count = frames * channels;
+  float multiplier = vol * 0x8000;
+
+  for (i = 0; i < sample_count; ++i) {
+    int32_t sample = lrintf(in[i] * multiplier);
+    if (sample < -0x8000) {
+      out[i] = -0x8000;
+    } else if (sample > 0x7fff) {
+      out[i] = 0x7fff;
+    } else {
+      out[i] = sample;
+    }
+  }
+}
+
+static void
+sun_linear_to_float(int16_t * in, float * out,
+                    unsigned channels, long frames)
+{
+  unsigned i, sample_count = frames * channels;
+
+  for (i = 0; i < sample_count; ++i) {
+    out[i] = (1.0 / 0x8000) * in[i];
+  }
+}
+
+static void
+sun_linear_set_vol(int16_t * buf, unsigned channels, long frames, float vol)
+{
+  unsigned i, sample_count = frames * channels;
+  int32_t multiplier = vol * 0x8000;
+
+  for (i = 0; i < sample_count; ++i) {
+    buf[i] = (buf[i] * multiplier) >> 15;
+  }
+}
+
+static void *
+sun_io_routine(void * arg)
+{
+  cubeb_stream *s = arg;
+  cubeb_state state = CUBEB_STATE_STARTED;
+  size_t to_read = 0;
+  long to_write = 0;
+  size_t write_ofs = 0;
+  size_t read_ofs = 0;
+  int drain = 0;
+
+  s->state_cb(s, s->user_ptr, CUBEB_STATE_STARTED);
+  while (state != CUBEB_STATE_ERROR) {
+    pthread_mutex_lock(&s->mutex);
+    if (!s->running) {
+      pthread_mutex_unlock(&s->mutex);
+      state = CUBEB_STATE_STOPPED;
+      break;
+    }
+    pthread_mutex_unlock(&s->mutex);
+    if (s->floating) {
+      if (s->record_fd != -1) {
+        sun_linear_to_float(s->record_buf, s->f_record_buf,
+                            s->r_info.record.channels, SUN_BUFFER_FRAMES);
+      }
+      to_write = s->data_cb(s, s->user_ptr,
+                            s->f_record_buf, s->f_play_buf, SUN_BUFFER_FRAMES);
+      if (to_write == CUBEB_ERROR) {
+        state = CUBEB_STATE_ERROR;
+        break;
+      }
+      if (s->play_fd != -1) {
+        pthread_mutex_lock(&s->mutex);
+        sun_float_to_linear(s->f_play_buf, s->play_buf,
+                            s->p_info.play.channels, to_write, s->volume);
+        pthread_mutex_unlock(&s->mutex);
+      }
+    } else {
+      to_write = s->data_cb(s, s->user_ptr,
+                            s->record_buf, s->play_buf, SUN_BUFFER_FRAMES);
+      if (to_write == CUBEB_ERROR) {
+        state = CUBEB_STATE_ERROR;
+        break;
+      }
+      if (s->play_fd != -1) {
+        pthread_mutex_lock(&s->mutex);
+        sun_linear_set_vol(s->play_buf, s->p_info.play.channels, to_write, s->volume);
+        pthread_mutex_unlock(&s->mutex);
+      }
+    }
+    if (to_write < SUN_BUFFER_FRAMES) {
+      drain = 1;
+    }
+    to_write = s->play_fd != -1 ? to_write : 0;
+    to_read = s->record_fd != -1 ? SUN_BUFFER_FRAMES : 0;
+    write_ofs = 0;
+    read_ofs = 0;
+    while (to_write > 0 || to_read > 0) {
+      size_t bytes;
+      ssize_t n, frames;
+
+      if (to_write > 0) {
+        bytes = FRAMES_TO_BYTES(to_write, s->p_info.play.channels);
+        if ((n = write(s->play_fd, s->play_buf + write_ofs, bytes)) < 0) {
+          state = CUBEB_STATE_ERROR;
+          break;
+        }
+        frames = BYTES_TO_FRAMES(n, s->p_info.play.channels);
+        pthread_mutex_lock(&s->mutex);
+        s->frames_written += frames;
+        pthread_mutex_unlock(&s->mutex);
+        to_write -= frames;
+        write_ofs += frames;
+      }
+      if (to_read > 0) {
+        bytes = FRAMES_TO_BYTES(to_read, s->r_info.record.channels);
+        if ((n = read(s->record_fd, s->record_buf + read_ofs, bytes)) < 0) {
+          state = CUBEB_STATE_ERROR;
+          break;
+        }
+        frames = BYTES_TO_FRAMES(n, s->r_info.record.channels);
+        to_read -= frames;
+        read_ofs += frames;
+      }
+    }
+    if (drain && state != CUBEB_STATE_ERROR) {
+      state = CUBEB_STATE_DRAINED;
+      break;
+    }
+  }
+  s->state_cb(s, s->user_ptr, state);
+  return NULL;
+}
+
+static int
+sun_stream_init(cubeb * context,
+                cubeb_stream ** stream,
+                char const * stream_name,
+                cubeb_devid input_device,
+                cubeb_stream_params * input_stream_params,
+                cubeb_devid output_device,
+                cubeb_stream_params * output_stream_params,
+                unsigned latency_frames,
+                cubeb_data_callback data_callback,
+                cubeb_state_callback state_callback,
+                void * user_ptr)
+{
+  int ret = CUBEB_OK;
+  cubeb_stream *s = NULL;
+
+  (void)stream_name;
+  (void)latency_frames;
+  if ((s = calloc(1, sizeof(cubeb_stream))) == NULL) {
+    ret = CUBEB_ERROR;
+    goto error;
+  }
+  s->record_fd = -1;
+  s->play_fd = -1;
+  if (input_device != 0) {
+    snprintf(s->input_name, sizeof(s->input_name),
+      "/dev/audio%zu", (uintptr_t)input_device - 1);
+  } else {
+    snprintf(s->input_name, sizeof(s->input_name), "%s", SUN_DEFAULT_DEVICE);
+  }
+  if (output_device != 0) {
+    snprintf(s->output_name, sizeof(s->output_name),
+      "/dev/audio%zu", (uintptr_t)output_device - 1);
+  } else {
+    snprintf(s->output_name, sizeof(s->output_name), "%s", SUN_DEFAULT_DEVICE);
+  }
+  if (input_stream_params != NULL) {
+    if (input_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK) {
+      LOG("Loopback not supported");
+      ret = CUBEB_ERROR_NOT_SUPPORTED;
+      goto error;
+    }
+    if (s->record_fd == -1) {
+      if ((s->record_fd = open(s->input_name, O_RDONLY)) == -1) {
+        LOG("Audio device cannot be opened as read-only");
+        ret = CUBEB_ERROR_DEVICE_UNAVAILABLE;
+        goto error;
+      }
+    }
+    AUDIO_INITINFO(&s->r_info);
+#ifdef AUMODE_RECORD
+    s->r_info.mode = AUMODE_RECORD;
+#endif
+    if ((ret = sun_copy_params(s->record_fd, s, input_stream_params,
+                               &s->r_info, &s->r_info.record)) != CUBEB_OK) {
+      LOG("Setting record params failed");
+      goto error;
+    }
+  }
+  if (output_stream_params != NULL) {
+    if (output_stream_params->prefs & CUBEB_STREAM_PREF_LOOPBACK) {
+      LOG("Loopback not supported");
+      ret = CUBEB_ERROR_NOT_SUPPORTED;
+      goto error;
+    }
+    if (s->play_fd == -1) {
+      if ((s->play_fd = open(s->output_name, O_WRONLY)) == -1) {
+        LOG("Audio device cannot be opened as write-only");
+        ret = CUBEB_ERROR_DEVICE_UNAVAILABLE;
+        goto error;
+      }
+    }
+    AUDIO_INITINFO(&s->p_info);
+#ifdef AUMODE_PLAY
+    s->p_info.mode = AUMODE_PLAY;
+#endif
+    if ((ret = sun_copy_params(s->play_fd, s, output_stream_params,
+                               &s->p_info, &s->p_info.play)) != CUBEB_OK) {
+      LOG("Setting play params failed");
+      goto error;
+    }
+  }
+  s->context = context;
+  s->volume = 1.0;
+  s->state_cb = state_callback;
+  s->data_cb = data_callback;
+  s->user_ptr = user_ptr;
+  if (pthread_mutex_init(&s->mutex, NULL) != 0) {
+    LOG("Failed to create mutex");
+    goto error;
+  }
+  if (s->play_fd != -1 && (s->play_buf = calloc(SUN_BUFFER_FRAMES,
+      s->p_info.play.channels * sizeof(int16_t))) == NULL) {
+    ret = CUBEB_ERROR;
+    goto error;
+  }
+  if (s->record_fd != -1 && (s->record_buf = calloc(SUN_BUFFER_FRAMES,
+      s->r_info.record.channels * sizeof(int16_t))) == NULL) {
+    ret = CUBEB_ERROR;
+    goto error;
+  }
+  if (s->floating) {
+    if (s->play_fd != -1 && (s->f_play_buf = calloc(SUN_BUFFER_FRAMES,
+        s->p_info.play.channels * sizeof(float))) == NULL) {
+      ret = CUBEB_ERROR;
+      goto error;
+    }
+    if (s->record_fd != -1 && (s->f_record_buf = calloc(SUN_BUFFER_FRAMES,
+        s->r_info.record.channels * sizeof(float))) == NULL) {
+      ret = CUBEB_ERROR;
+      goto error;
+    }
+  }
+  *stream = s;
+  return CUBEB_OK;
+error:
+  if (s != NULL) {
+    sun_stream_destroy(s);
+  }
+  return ret;
+}
+
+static int
+sun_stream_start(cubeb_stream * s)
+{
+  s->running = 1;
+  if (pthread_create(&s->thread, NULL, sun_io_routine, s) != 0) {
+    LOG("Couldn't create thread");
+    return CUBEB_ERROR;
+  }
+  return CUBEB_OK;
+}
+
+static int
+sun_stream_get_position(cubeb_stream * s, uint64_t * position)
+{
+#ifdef AUDIO_GETOOFFS
+  struct audio_offset offset;
+
+  if (ioctl(s->play_fd, AUDIO_GETOOFFS, &offset) == -1) {
+    return CUBEB_ERROR;
+  }
+  s->blocks_written += offset.deltablks;
+  *position = BYTES_TO_FRAMES(s->blocks_written * s->p_info.blocksize,
+                              s->p_info.play.channels);
+  return CUBEB_OK;
+#else
+  pthread_mutex_lock(&s->mutex);
+  *position = s->frames_written;
+  pthread_mutex_unlock(&s->mutex);
+  return CUBEB_OK;
+#endif
+}
+
+static int
+sun_stream_get_latency(cubeb_stream * stream, uint32_t * latency)
+{
+#ifdef AUDIO_GETBUFINFO
+  struct audio_info info;
+
+  if (ioctl(stream->play_fd, AUDIO_GETBUFINFO, &info) == -1) {
+    return CUBEB_ERROR;
+  }
+
+  *latency = BYTES_TO_FRAMES(info.play.seek + info.blocksize,
+                             info.play.channels);
+  return CUBEB_OK;
+#else
+  cubeb_stream_params params;
+
+  params.rate = stream->p_info.play.sample_rate;
+
+  return sun_get_min_latency(NULL, params, latency);
+#endif
+}
+
+static int
+sun_stream_set_volume(cubeb_stream * stream, float volume)
+{
+  pthread_mutex_lock(&stream->mutex);
+  stream->volume = volume;
+  pthread_mutex_unlock(&stream->mutex);
+  return CUBEB_OK;
+}
+
+static int
+sun_get_current_device(cubeb_stream * stream, cubeb_device ** const device)
+{
+  *device = calloc(1, sizeof(cubeb_device));
+  if (*device == NULL) {
+    return CUBEB_ERROR;
+  }
+  (*device)->input_name = stream->record_fd != -1 ?
+    strdup(stream->input_name) : NULL;
+  (*device)->output_name = stream->play_fd != -1 ?
+    strdup(stream->output_name) : NULL;
+  return CUBEB_OK;
+}
+
+static int
+sun_stream_device_destroy(cubeb_stream * stream, cubeb_device * device)
+{
+  (void)stream;
+  free(device->input_name);
+  free(device->output_name);
+  free(device);
+  return CUBEB_OK;
+}
+
+static struct cubeb_ops const sun_ops = {
+  .init = sun_init,
+  .get_backend_id = sun_get_backend_id,
+  .get_max_channel_count = sun_get_max_channel_count,
+  .get_min_latency = sun_get_min_latency,
+  .get_preferred_sample_rate = sun_get_preferred_sample_rate,
+  .enumerate_devices = sun_enumerate_devices,
+  .device_collection_destroy = sun_device_collection_destroy,
+  .destroy = sun_destroy,
+  .stream_init = sun_stream_init,
+  .stream_destroy = sun_stream_destroy,
+  .stream_start = sun_stream_start,
+  .stream_stop = sun_stream_stop,
+  .stream_reset_default_device = NULL,
+  .stream_get_position = sun_stream_get_position,
+  .stream_get_latency = sun_stream_get_latency,
+  .stream_set_volume = sun_stream_set_volume,
+  .stream_get_current_device = sun_get_current_device,
+  .stream_device_destroy = sun_stream_device_destroy,
+  .stream_register_device_changed_callback = NULL,
+  .register_device_collection_changed = NULL
+};

dep/cubeb/src/cubeb_utils.cpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright © 2018 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#include "cubeb_utils.h"
+
+size_t cubeb_sample_size(cubeb_sample_format format)
+{
+  switch (format) {
+    case CUBEB_SAMPLE_S16LE:
+    case CUBEB_SAMPLE_S16BE:
+      return sizeof(int16_t);
+    case CUBEB_SAMPLE_FLOAT32LE:
+    case CUBEB_SAMPLE_FLOAT32BE:
+      return sizeof(float);
+    default:
+      // should never happen as all cases are handled above.
+      assert(false);
+  }
+}

dep/cubeb/src/cubeb_utils.h

@@ -0,0 +1,343 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#if !defined(CUBEB_UTILS)
+#define CUBEB_UTILS
+
+#include "cubeb/cubeb.h"
+
+#ifdef __cplusplus
+
+#include <stdint.h>
+#include <string.h>
+#include <assert.h>
+#include <mutex>
+#include <type_traits>
+#if defined(_WIN32)
+#include "cubeb_utils_win.h"
+#else
+#include "cubeb_utils_unix.h"
+#endif
+
+/** Similar to memcpy, but accounts for the size of an element. */
+template<typename T>
+void PodCopy(T * destination, const T * source, size_t count)
+{
+  static_assert(std::is_trivial<T>::value, "Requires trivial type");
+  assert(destination && source);
+  memcpy(destination, source, count * sizeof(T));
+}
+
+/** Similar to memmove, but accounts for the size of an element. */
+template<typename T>
+void PodMove(T * destination, const T * source, size_t count)
+{
+  static_assert(std::is_trivial<T>::value, "Requires trivial type");
+  assert(destination && source);
+  memmove(destination, source, count * sizeof(T));
+}
+
+/** Similar to a memset to zero, but accounts for the size of an element. */
+template<typename T>
+void PodZero(T * destination, size_t count)
+{
+  static_assert(std::is_trivial<T>::value, "Requires trivial type");
+  assert(destination);
+  memset(destination, 0,  count * sizeof(T));
+}
+
+namespace {
+template<typename T, typename Trait>
+void Copy(T * destination, const T * source, size_t count, Trait)
+{
+  for (size_t i = 0; i < count; i++) {
+    destination[i] = source[i];
+  }
+}
+
+template<typename T>
+void Copy(T * destination, const T * source, size_t count, std::true_type)
+{
+  PodCopy(destination, source, count);
+}
+}
+
+/**
+ * This allows copying a number of elements from a `source` pointer to a
+ * `destination` pointer, using `memcpy` if it is safe to do so, or a loop that
+ * calls the constructors and destructors otherwise.
+ */
+template<typename T>
+void Copy(T * destination, const T * source, size_t count)
+{
+  assert(destination && source);
+  Copy(destination, source, count, typename std::is_trivial<T>::type());
+}
+
+namespace {
+template<typename T, typename Trait>
+void ConstructDefault(T * destination, size_t count, Trait)
+{
+  for (size_t i = 0; i < count; i++) {
+    destination[i] = T();
+  }
+}
+
+template<typename T>
+void ConstructDefault(T * destination,
+                      size_t count, std::true_type)
+{
+  PodZero(destination, count);
+}
+}
+
+/**
+ * This allows zeroing (using memset) or default-constructing a number of
+ * elements calling the constructors and destructors if necessary.
+ */
+template<typename T>
+void ConstructDefault(T * destination, size_t count)
+{
+  assert(destination);
+  ConstructDefault(destination, count,
+                   typename std::is_arithmetic<T>::type());
+}
+
+template<typename T>
+class auto_array
+{
+public:
+  explicit auto_array(uint32_t capacity = 0)
+    : data_(capacity ? new T[capacity] : nullptr)
+    , capacity_(capacity)
+    , length_(0)
+  {}
+
+  ~auto_array()
+  {
+    delete [] data_;
+  }
+
+  /** Get a constant pointer to the underlying data. */
+  T * data() const
+  {
+    return data_;
+  }
+
+  T * end() const
+  {
+    return data_ + length_;
+  }
+
+  const T& at(size_t index) const
+  {
+    assert(index < length_ && "out of range");
+    return data_[index];
+  }
+
+  T& at(size_t index)
+  {
+    assert(index < length_ && "out of range");
+    return data_[index];
+  }
+
+  /** Get how much underlying storage this auto_array has. */
+  size_t capacity() const
+  {
+    return capacity_;
+  }
+
+  /** Get how much elements this auto_array contains. */
+  size_t length() const
+  {
+    return length_;
+  }
+
+  /** Keeps the storage, but removes all the elements from the array. */
+  void clear()
+  {
+    length_ = 0;
+  }
+
+   /** Change the storage of this auto array, copying the elements to the new
+    * storage.
+    * @returns true in case of success
+    * @returns false if the new capacity is not big enough to accomodate for the
+    *                elements in the array.
+    */
+  bool reserve(size_t new_capacity)
+  {
+    if (new_capacity < length_) {
+      return false;
+    }
+    T * new_data = new T[new_capacity];
+    if (data_ && length_) {
+      PodCopy(new_data, data_, length_);
+    }
+    capacity_ = new_capacity;
+    delete [] data_;
+    data_ = new_data;
+
+    return true;
+  }
+
+   /** Append `length` elements to the end of the array, resizing the array if
+    * needed.
+    * @parameter elements the elements to append to the array.
+    * @parameter length the number of elements to append to the array.
+    */
+  void push(const T * elements, size_t length)
+  {
+    if (length_ + length > capacity_) {
+      reserve(length_ + length);
+    }
+    PodCopy(data_ + length_, elements, length);
+    length_ += length;
+  }
+
+  /** Append `length` zero-ed elements to the end of the array, resizing the
+   * array if needed.
+   * @parameter length the number of elements to append to the array.
+   */
+  void push_silence(size_t length)
+  {
+    if (length_ + length > capacity_) {
+      reserve(length + length_);
+    }
+    PodZero(data_ + length_, length);
+    length_ += length;
+  }
+
+  /** Prepend `length` zero-ed elements to the end of the array, resizing the
+   * array if needed.
+   * @parameter length the number of elements to prepend to the array.
+   */
+  void push_front_silence(size_t length)
+  {
+    if (length_ + length > capacity_) {
+      reserve(length + length_);
+    }
+    PodMove(data_ + length, data_, length_);
+    PodZero(data_, length);
+    length_ += length;
+  }
+
+  /** Return the number of free elements in the array. */
+  size_t available() const
+  {
+    return capacity_ - length_;
+  }
+
+  /** Copies `length` elements to `elements` if it is not null, and shift
+    * the remaining elements of the `auto_array` to the beginning.
+    * @parameter elements a buffer to copy the elements to, or nullptr.
+    * @parameter length the number of elements to copy.
+    * @returns true in case of success.
+    * @returns false if the auto_array contains less than `length` elements. */
+  bool pop(T * elements, size_t length)
+  {
+    if (length > length_) {
+      return false;
+    }
+    if (elements) {
+      PodCopy(elements, data_, length);
+    }
+    PodMove(data_, data_ + length, length_ - length);
+
+    length_ -= length;
+
+    return true;
+  }
+
+  void set_length(size_t length)
+  {
+    assert(length <= capacity_);
+    length_ = length;
+  }
+
+private:
+  /** The underlying storage */
+  T * data_;
+  /** The size, in number of elements, of the storage. */
+  size_t capacity_;
+  /** The number of elements the array contains. */
+  size_t length_;
+};
+
+struct auto_array_wrapper {
+  virtual void push(void * elements, size_t length) = 0;
+  virtual size_t length() = 0;
+  virtual void push_silence(size_t length) = 0;
+  virtual bool pop(size_t length) = 0;
+  virtual void * data() = 0;
+  virtual void * end() = 0;
+  virtual void clear() = 0;
+  virtual bool reserve(size_t capacity) = 0;
+  virtual void set_length(size_t length) = 0;
+  virtual ~auto_array_wrapper() {}
+};
+
+template <typename T>
+struct auto_array_wrapper_impl : public auto_array_wrapper {
+  auto_array_wrapper_impl() {}
+
+  explicit auto_array_wrapper_impl(uint32_t size)
+    : ar(size)
+  {}
+
+  void push(void * elements, size_t length) override {
+    ar.push(static_cast<T *>(elements), length);
+  }
+
+  size_t length() override {
+    return ar.length();
+  }
+
+  void push_silence(size_t length) override {
+    ar.push_silence(length);
+  }
+
+  bool pop(size_t length) override {
+    return ar.pop(nullptr, length);
+  }
+
+  void * data() override {
+    return ar.data();
+  }
+
+  void * end() override {
+    return ar.end();
+  }
+
+  void clear() override {
+    ar.clear();
+  }
+
+  bool reserve(size_t capacity) override {
+    return ar.reserve(capacity);
+  }
+
+  void set_length(size_t length) override {
+    ar.set_length(length);
+  }
+
+  ~auto_array_wrapper_impl() {
+    ar.clear();
+  }
+
+private:
+  auto_array<T> ar;
+};
+
+extern "C" {
+  size_t cubeb_sample_size(cubeb_sample_format format);
+}
+
+using auto_lock = std::lock_guard<owned_critical_section>;
+#endif // __cplusplus
+
+#endif /* CUBEB_UTILS */

dep/cubeb/src/cubeb_utils_unix.h

@@ -0,0 +1,89 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#if !defined(CUBEB_UTILS_UNIX)
+#define CUBEB_UTILS_UNIX
+
+#include <pthread.h>
+#include <errno.h>
+#include <stdio.h>
+
+/* This wraps a critical section to track the owner in debug mode. */
+class owned_critical_section
+{
+public:
+  owned_critical_section()
+  {
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_init(&attr);
+#ifndef NDEBUG
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
+#else
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
+#endif
+
+#ifndef NDEBUG
+    int r =
+#endif
+    pthread_mutex_init(&mutex, &attr);
+#ifndef NDEBUG
+    assert(r == 0);
+#endif
+
+    pthread_mutexattr_destroy(&attr);
+  }
+
+  ~owned_critical_section()
+  {
+#ifndef NDEBUG
+    int r =
+#endif
+    pthread_mutex_destroy(&mutex);
+#ifndef NDEBUG
+    assert(r == 0);
+#endif
+  }
+
+  void lock()
+  {
+#ifndef NDEBUG
+    int r =
+#endif
+    pthread_mutex_lock(&mutex);
+#ifndef NDEBUG
+    assert(r == 0 && "Deadlock");
+#endif
+  }
+
+  void unlock()
+  {
+#ifndef NDEBUG
+    int r =
+#endif
+    pthread_mutex_unlock(&mutex);
+#ifndef NDEBUG
+    assert(r == 0 && "Unlocking unlocked mutex");
+#endif
+  }
+
+  void assert_current_thread_owns()
+  {
+#ifndef NDEBUG
+    int r = pthread_mutex_lock(&mutex);
+    assert(r == EDEADLK);
+#endif
+  }
+
+private:
+  pthread_mutex_t mutex;
+
+  // Disallow copy and assignment because pthread_mutex_t cannot be copied.
+  owned_critical_section(const owned_critical_section&);
+  owned_critical_section& operator=(const owned_critical_section&);
+};
+
+#endif /* CUBEB_UTILS_UNIX */

dep/cubeb/src/cubeb_utils_win.h

@@ -0,0 +1,71 @@
+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#if !defined(CUBEB_UTILS_WIN)
+#define CUBEB_UTILS_WIN
+
+#include <windows.h>
+#include "cubeb-internal.h"
+
+/* This wraps a critical section to track the owner in debug mode, adapted from
+   NSPR and http://blogs.msdn.com/b/oldnewthing/archive/2013/07/12/10433554.aspx */
+class owned_critical_section
+{
+public:
+  owned_critical_section()
+#ifndef NDEBUG
+    : owner(0)
+#endif
+  {
+    InitializeCriticalSection(&critical_section);
+  }
+
+  ~owned_critical_section()
+  {
+    DeleteCriticalSection(&critical_section);
+  }
+
+  void lock()
+  {
+    EnterCriticalSection(&critical_section);
+#ifndef NDEBUG
+    XASSERT(owner != GetCurrentThreadId() && "recursive locking");
+    owner = GetCurrentThreadId();
+#endif
+  }
+
+  void unlock()
+  {
+#ifndef NDEBUG
+    /* GetCurrentThreadId cannot return 0: it is not a the valid thread id */
+    owner = 0;
+#endif
+    LeaveCriticalSection(&critical_section);
+  }
+
+  /* This is guaranteed to have the good behaviour if it succeeds. The behaviour
+     is undefined otherwise. */
+  void assert_current_thread_owns()
+  {
+#ifndef NDEBUG
+    /* This implies owner != 0, because GetCurrentThreadId cannot return 0. */
+    XASSERT(owner == GetCurrentThreadId());
+#endif
+  }
+
+private:
+  CRITICAL_SECTION critical_section;
+#ifndef NDEBUG
+  DWORD owner;
+#endif
+
+  // Disallow copy and assignment because CRICICAL_SECTION cannot be copied.
+  owned_critical_section(const owned_critical_section&);
+  owned_critical_section& operator=(const owned_critical_section&);
+};
+
+#endif /* CUBEB_UTILS_WIN */

dep/cubeb/src/speex/arch.h

@@ -0,0 +1,235 @@
+/* Copyright (C) 2003 Jean-Marc Valin */
+/**
+   @file arch.h
+   @brief Various architecture definitions Speex
+*/
+/*
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   - Neither the name of the Xiph.org Foundation nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef ARCH_H
+#define ARCH_H
+
+/* A couple test to catch stupid option combinations */
+#ifdef FIXED_POINT
+
+#ifdef FLOATING_POINT
+#error You cannot compile as floating point and fixed point at the same time
+#endif
+#ifdef _USE_SSE
+#error SSE is only for floating-point
+#endif
+#if ((defined (ARM4_ASM)||defined (ARM4_ASM)) && defined(BFIN_ASM)) || (defined (ARM4_ASM)&&defined(ARM5E_ASM))
+#error Make up your mind. What CPU do you have?
+#endif
+#ifdef VORBIS_PSYCHO
+#error Vorbis-psy model currently not implemented in fixed-point
+#endif
+
+#else
+
+#ifndef FLOATING_POINT
+#error You now need to define either FIXED_POINT or FLOATING_POINT
+#endif
+#if defined (ARM4_ASM) || defined(ARM5E_ASM) || defined(BFIN_ASM)
+#error I suppose you can have a [ARM4/ARM5E/Blackfin] that has float instructions?
+#endif
+#ifdef FIXED_POINT_DEBUG
+#error "Don't you think enabling fixed-point is a good thing to do if you want to debug that?"
+#endif
+
+
+#endif
+
+#ifndef OUTSIDE_SPEEX
+#include "speex/speexdsp_types.h"
+#endif
+
+#define ABS(x) ((x) < 0 ? (-(x)) : (x))      /**< Absolute integer value. */
+#define ABS16(x) ((x) < 0 ? (-(x)) : (x))    /**< Absolute 16-bit value.  */
+#define MIN16(a,b) ((a) < (b) ? (a) : (b))   /**< Maximum 16-bit value.   */
+#define MAX16(a,b) ((a) > (b) ? (a) : (b))   /**< Maximum 16-bit value.   */
+#define ABS32(x) ((x) < 0 ? (-(x)) : (x))    /**< Absolute 32-bit value.  */
+#define MIN32(a,b) ((a) < (b) ? (a) : (b))   /**< Maximum 32-bit value.   */
+#define MAX32(a,b) ((a) > (b) ? (a) : (b))   /**< Maximum 32-bit value.   */
+
+#ifdef FIXED_POINT
+
+typedef spx_int16_t spx_word16_t;
+typedef spx_int32_t spx_word32_t;
+typedef spx_word32_t spx_mem_t;
+typedef spx_word16_t spx_coef_t;
+typedef spx_word16_t spx_lsp_t;
+typedef spx_word32_t spx_sig_t;
+
+#define Q15ONE 32767
+
+#define LPC_SCALING  8192
+#define SIG_SCALING  16384
+#define LSP_SCALING  8192.
+#define GAMMA_SCALING 32768.
+#define GAIN_SCALING 64
+#define GAIN_SCALING_1 0.015625
+
+#define LPC_SHIFT    13
+#define LSP_SHIFT    13
+#define SIG_SHIFT    14
+#define GAIN_SHIFT   6
+
+#define WORD2INT(x) ((x) < -32767 ? -32768 : ((x) > 32766 ? 32767 : (x)))
+
+#define VERY_SMALL 0
+#define VERY_LARGE32 ((spx_word32_t)2147483647)
+#define VERY_LARGE16 ((spx_word16_t)32767)
+#define Q15_ONE ((spx_word16_t)32767)
+
+
+#ifdef FIXED_DEBUG
+#include "fixed_debug.h"
+#else
+
+#include "fixed_generic.h"
+
+#ifdef ARM5E_ASM
+#include "fixed_arm5e.h"
+#elif defined (ARM4_ASM)
+#include "fixed_arm4.h"
+#elif defined (BFIN_ASM)
+#include "fixed_bfin.h"
+#endif
+
+#endif
+
+
+#else
+
+typedef float spx_mem_t;
+typedef float spx_coef_t;
+typedef float spx_lsp_t;
+typedef float spx_sig_t;
+typedef float spx_word16_t;
+typedef float spx_word32_t;
+
+#define Q15ONE 1.0f
+#define LPC_SCALING  1.f
+#define SIG_SCALING  1.f
+#define LSP_SCALING  1.f
+#define GAMMA_SCALING 1.f
+#define GAIN_SCALING 1.f
+#define GAIN_SCALING_1 1.f
+
+
+#define VERY_SMALL 1e-15f
+#define VERY_LARGE32 1e15f
+#define VERY_LARGE16 1e15f
+#define Q15_ONE ((spx_word16_t)1.f)
+
+#define QCONST16(x,bits) (x)
+#define QCONST32(x,bits) (x)
+
+#define NEG16(x) (-(x))
+#define NEG32(x) (-(x))
+#define EXTRACT16(x) (x)
+#define EXTEND32(x) (x)
+#define SHR16(a,shift) (a)
+#define SHL16(a,shift) (a)
+#define SHR32(a,shift) (a)
+#define SHL32(a,shift) (a)
+#define PSHR16(a,shift) (a)
+#define PSHR32(a,shift) (a)
+#define VSHR32(a,shift) (a)
+#define SATURATE16(x,a) (x)
+#define SATURATE32(x,a) (x)
+#define SATURATE32PSHR(x,shift,a) (x)
+
+#define PSHR(a,shift)       (a)
+#define SHR(a,shift)       (a)
+#define SHL(a,shift)       (a)
+#define SATURATE(x,a) (x)
+
+#define ADD16(a,b) ((a)+(b))
+#define SUB16(a,b) ((a)-(b))
+#define ADD32(a,b) ((a)+(b))
+#define SUB32(a,b) ((a)-(b))
+#define MULT16_16_16(a,b)     ((a)*(b))
+#define MULT16_16(a,b)     ((spx_word32_t)(a)*(spx_word32_t)(b))
+#define MAC16_16(c,a,b)     ((c)+(spx_word32_t)(a)*(spx_word32_t)(b))
+
+#define MULT16_32_Q11(a,b)     ((a)*(b))
+#define MULT16_32_Q13(a,b)     ((a)*(b))
+#define MULT16_32_Q14(a,b)     ((a)*(b))
+#define MULT16_32_Q15(a,b)     ((a)*(b))
+#define MULT16_32_P15(a,b)     ((a)*(b))
+
+#define MAC16_32_Q11(c,a,b)     ((c)+(a)*(b))
+#define MAC16_32_Q15(c,a,b)     ((c)+(a)*(b))
+
+#define MAC16_16_Q11(c,a,b)     ((c)+(a)*(b))
+#define MAC16_16_Q13(c,a,b)     ((c)+(a)*(b))
+#define MAC16_16_P13(c,a,b)     ((c)+(a)*(b))
+#define MULT16_16_Q11_32(a,b)     ((a)*(b))
+#define MULT16_16_Q13(a,b)     ((a)*(b))
+#define MULT16_16_Q14(a,b)     ((a)*(b))
+#define MULT16_16_Q15(a,b)     ((a)*(b))
+#define MULT16_16_P15(a,b)     ((a)*(b))
+#define MULT16_16_P13(a,b)     ((a)*(b))
+#define MULT16_16_P14(a,b)     ((a)*(b))
+
+#define DIV32_16(a,b)     (((spx_word32_t)(a))/(spx_word16_t)(b))
+#define PDIV32_16(a,b)     (((spx_word32_t)(a))/(spx_word16_t)(b))
+#define DIV32(a,b)     (((spx_word32_t)(a))/(spx_word32_t)(b))
+#define PDIV32(a,b)     (((spx_word32_t)(a))/(spx_word32_t)(b))
+
+#define WORD2INT(x) ((x) < -32767.5f ? -32768 : \
+                    ((x) > 32766.5f ? 32767 : (spx_int16_t)floor(.5 + (x))))
+#endif
+
+
+#if defined (CONFIG_TI_C54X) || defined (CONFIG_TI_C55X)
+
+/* 2 on TI C5x DSP */
+#define BYTES_PER_CHAR 2
+#define BITS_PER_CHAR 16
+#define LOG2_BITS_PER_CHAR 4
+
+#else
+
+#define BYTES_PER_CHAR 1
+#define BITS_PER_CHAR 8
+#define LOG2_BITS_PER_CHAR 3
+
+#endif
+
+
+
+#ifdef FIXED_DEBUG
+extern long long spx_mips;
+#endif
+
+
+#endif

dep/cubeb/src/speex/fixed_generic.h

@@ -0,0 +1,110 @@
+/* Copyright (C) 2003 Jean-Marc Valin */
+/**
+   @file fixed_generic.h
+   @brief Generic fixed-point operations
+*/
+/*
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   - Neither the name of the Xiph.org Foundation nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef FIXED_GENERIC_H
+#define FIXED_GENERIC_H
+
+#define QCONST16(x,bits) ((spx_word16_t)(.5+(x)*(((spx_word32_t)1)<<(bits))))
+#define QCONST32(x,bits) ((spx_word32_t)(.5+(x)*(((spx_word32_t)1)<<(bits))))
+
+#define NEG16(x) (-(x))
+#define NEG32(x) (-(x))
+#define EXTRACT16(x) ((spx_word16_t)(x))
+#define EXTEND32(x) ((spx_word32_t)(x))
+#define SHR16(a,shift) ((a) >> (shift))
+#define SHL16(a,shift) ((a) << (shift))
+#define SHR32(a,shift) ((a) >> (shift))
+#define SHL32(a,shift) ((a) << (shift))
+#define PSHR16(a,shift) (SHR16((a)+((1<<((shift))>>1)),shift))
+#define PSHR32(a,shift) (SHR32((a)+((EXTEND32(1)<<((shift))>>1)),shift))
+#define VSHR32(a, shift) (((shift)>0) ? SHR32(a, shift) : SHL32(a, -(shift)))
+#define SATURATE16(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
+#define SATURATE32(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
+
+#define SATURATE32PSHR(x,shift,a) (((x)>=(SHL32(a,shift))) ? (a) : \
+                                   (x)<=-(SHL32(a,shift)) ? -(a) : \
+                                   (PSHR32(x, shift)))
+
+#define SHR(a,shift) ((a) >> (shift))
+#define SHL(a,shift) ((spx_word32_t)(a) << (shift))
+#define PSHR(a,shift) (SHR((a)+((EXTEND32(1)<<((shift))>>1)),shift))
+#define SATURATE(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
+
+
+#define ADD16(a,b) ((spx_word16_t)((spx_word16_t)(a)+(spx_word16_t)(b)))
+#define SUB16(a,b) ((spx_word16_t)(a)-(spx_word16_t)(b))
+#define ADD32(a,b) ((spx_word32_t)(a)+(spx_word32_t)(b))
+#define SUB32(a,b) ((spx_word32_t)(a)-(spx_word32_t)(b))
+
+
+/* result fits in 16 bits */
+#define MULT16_16_16(a,b)     ((((spx_word16_t)(a))*((spx_word16_t)(b))))
+
+/* (spx_word32_t)(spx_word16_t) gives TI compiler a hint that it's 16x16->32 multiply */
+#define MULT16_16(a,b)     (((spx_word32_t)(spx_word16_t)(a))*((spx_word32_t)(spx_word16_t)(b)))
+
+#define MAC16_16(c,a,b) (ADD32((c),MULT16_16((a),(b))))
+#define MULT16_32_Q12(a,b) ADD32(MULT16_16((a),SHR((b),12)), SHR(MULT16_16((a),((b)&0x00000fff)),12))
+#define MULT16_32_Q13(a,b) ADD32(MULT16_16((a),SHR((b),13)), SHR(MULT16_16((a),((b)&0x00001fff)),13))
+#define MULT16_32_Q14(a,b) ADD32(MULT16_16((a),SHR((b),14)), SHR(MULT16_16((a),((b)&0x00003fff)),14))
+
+#define MULT16_32_Q11(a,b) ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11))
+#define MAC16_32_Q11(c,a,b) ADD32(c,ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11)))
+
+#define MULT16_32_P15(a,b) ADD32(MULT16_16((a),SHR((b),15)), PSHR(MULT16_16((a),((b)&0x00007fff)),15))
+#define MULT16_32_Q15(a,b) ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15))
+#define MAC16_32_Q15(c,a,b) ADD32(c,ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15)))
+
+
+#define MAC16_16_Q11(c,a,b)     (ADD32((c),SHR(MULT16_16((a),(b)),11)))
+#define MAC16_16_Q13(c,a,b)     (ADD32((c),SHR(MULT16_16((a),(b)),13)))
+#define MAC16_16_P13(c,a,b)     (ADD32((c),SHR(ADD32(4096,MULT16_16((a),(b))),13)))
+
+#define MULT16_16_Q11_32(a,b) (SHR(MULT16_16((a),(b)),11))
+#define MULT16_16_Q13(a,b) (SHR(MULT16_16((a),(b)),13))
+#define MULT16_16_Q14(a,b) (SHR(MULT16_16((a),(b)),14))
+#define MULT16_16_Q15(a,b) (SHR(MULT16_16((a),(b)),15))
+
+#define MULT16_16_P13(a,b) (SHR(ADD32(4096,MULT16_16((a),(b))),13))
+#define MULT16_16_P14(a,b) (SHR(ADD32(8192,MULT16_16((a),(b))),14))
+#define MULT16_16_P15(a,b) (SHR(ADD32(16384,MULT16_16((a),(b))),15))
+
+#define MUL_16_32_R15(a,bh,bl) ADD32(MULT16_16((a),(bh)), SHR(MULT16_16((a),(bl)),15))
+
+#define DIV32_16(a,b) ((spx_word16_t)(((spx_word32_t)(a))/((spx_word16_t)(b))))
+#define PDIV32_16(a,b) ((spx_word16_t)(((spx_word32_t)(a)+((spx_word16_t)(b)>>1))/((spx_word16_t)(b))))
+#define DIV32(a,b) (((spx_word32_t)(a))/((spx_word32_t)(b)))
+#define PDIV32(a,b) (((spx_word32_t)(a)+((spx_word16_t)(b)>>1))/((spx_word32_t)(b)))
+
+#endif

dep/cubeb/src/speex/resample_neon.h

@@ -0,0 +1,201 @@
+/* Copyright (C) 2007-2008 Jean-Marc Valin
+ * Copyright (C) 2008 Thorvald Natvig
+ * Copyright (C) 2011 Texas Instruments
+ *               author Jyri Sarha
+ */
+/**
+   @file resample_neon.h
+   @brief Resampler functions (NEON version)
+*/
+/*
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   - Neither the name of the Xiph.org Foundation nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <arm_neon.h>
+
+#ifdef FIXED_POINT
+#ifdef __thumb2__
+static inline int32_t saturate_32bit_to_16bit(int32_t a) {
+    int32_t ret;
+    asm ("ssat %[ret], #16, %[a]"
+         : [ret] "=&r" (ret)
+         : [a] "r" (a)
+         : );
+    return ret;
+}
+#else
+static inline int32_t saturate_32bit_to_16bit(int32_t a) {
+    int32_t ret;
+    asm ("vmov.s32 d0[0], %[a]\n"
+         "vqmovn.s32 d0, q0\n"
+         "vmov.s16 %[ret], d0[0]\n"
+         : [ret] "=&r" (ret)
+         : [a] "r" (a)
+         : "q0");
+    return ret;
+}
+#endif
+#undef WORD2INT
+#define WORD2INT(x) (saturate_32bit_to_16bit(x))
+
+#define OVERRIDE_INNER_PRODUCT_SINGLE
+/* Only works when len % 4 == 0 */
+static inline int32_t inner_product_single(const int16_t *a, const int16_t *b, unsigned int len)
+{
+    int32_t ret;
+    uint32_t remainder = len % 16;
+    len = len - remainder;
+
+    asm volatile ("	 cmp %[len], #0\n"
+		  "	 bne 1f\n"
+		  "	 vld1.16 {d16}, [%[b]]!\n"
+		  "	 vld1.16 {d20}, [%[a]]!\n"
+		  "	 subs %[remainder], %[remainder], #4\n"
+		  "	 vmull.s16 q0, d16, d20\n"
+		  "      beq 5f\n"
+		  "	 b 4f\n"
+		  "1:"
+		  "	 vld1.16 {d16, d17, d18, d19}, [%[b]]!\n"
+		  "	 vld1.16 {d20, d21, d22, d23}, [%[a]]!\n"
+		  "	 subs %[len], %[len], #16\n"
+		  "	 vmull.s16 q0, d16, d20\n"
+		  "	 vmlal.s16 q0, d17, d21\n"
+		  "	 vmlal.s16 q0, d18, d22\n"
+		  "	 vmlal.s16 q0, d19, d23\n"
+		  "	 beq 3f\n"
+		  "2:"
+		  "	 vld1.16 {d16, d17, d18, d19}, [%[b]]!\n"
+		  "	 vld1.16 {d20, d21, d22, d23}, [%[a]]!\n"
+		  "	 subs %[len], %[len], #16\n"
+		  "	 vmlal.s16 q0, d16, d20\n"
+		  "	 vmlal.s16 q0, d17, d21\n"
+		  "	 vmlal.s16 q0, d18, d22\n"
+		  "	 vmlal.s16 q0, d19, d23\n"
+		  "	 bne 2b\n"
+		  "3:"
+		  "	 cmp %[remainder], #0\n"
+		  "	 beq 5f\n"
+		  "4:"
+		  "	 vld1.16 {d16}, [%[b]]!\n"
+		  "	 vld1.16 {d20}, [%[a]]!\n"
+		  "	 subs %[remainder], %[remainder], #4\n"
+		  "	 vmlal.s16 q0, d16, d20\n"
+		  "	 bne 4b\n"
+		  "5:"
+		  "	 vaddl.s32 q0, d0, d1\n"
+		  "	 vadd.s64 d0, d0, d1\n"
+		  "	 vqmovn.s64 d0, q0\n"
+		  "	 vqrshrn.s32 d0, q0, #15\n"
+		  "	 vmov.s16 %[ret], d0[0]\n"
+		  : [ret] "=&r" (ret), [a] "+r" (a), [b] "+r" (b),
+		    [len] "+r" (len), [remainder] "+r" (remainder)
+		  :
+		  : "cc", "q0",
+		    "d16", "d17", "d18", "d19",
+		    "d20", "d21", "d22", "d23");
+
+    return ret;
+}
+#elif defined(FLOATING_POINT)
+
+static inline int32_t saturate_float_to_16bit(float a) {
+    int32_t ret;
+    asm ("vmov.f32 d0[0], %[a]\n"
+         "vcvt.s32.f32 d0, d0, #15\n"
+         "vqrshrn.s32 d0, q0, #15\n"
+         "vmov.s16 %[ret], d0[0]\n"
+         : [ret] "=&r" (ret)
+         : [a] "r" (a)
+         : "q0");
+    return ret;
+}
+#undef WORD2INT
+#define WORD2INT(x) (saturate_float_to_16bit(x))
+
+#define OVERRIDE_INNER_PRODUCT_SINGLE
+/* Only works when len % 4 == 0 */
+static inline float inner_product_single(const float *a, const float *b, unsigned int len)
+{
+    float ret;
+    uint32_t remainder = len % 16;
+    len = len - remainder;
+
+    asm volatile ("	 cmp %[len], #0\n"
+		  "	 bne 1f\n"
+		  "	 vld1.32 {q4}, [%[b]]!\n"
+		  "	 vld1.32 {q8}, [%[a]]!\n"
+		  "	 subs %[remainder], %[remainder], #4\n"
+		  "	 vmul.f32 q0, q4, q8\n"
+		  "      bne 4f\n"
+		  "	 b 5f\n"
+		  "1:"
+		  "	 vld1.32 {q4, q5}, [%[b]]!\n"
+		  "	 vld1.32 {q8, q9}, [%[a]]!\n"
+		  "	 vld1.32 {q6, q7}, [%[b]]!\n"
+		  "	 vld1.32 {q10, q11}, [%[a]]!\n"
+		  "	 subs %[len], %[len], #16\n"
+		  "	 vmul.f32 q0, q4, q8\n"
+		  "	 vmul.f32 q1, q5, q9\n"
+		  "	 vmul.f32 q2, q6, q10\n"
+		  "	 vmul.f32 q3, q7, q11\n"
+		  "	 beq 3f\n"
+		  "2:"
+		  "	 vld1.32 {q4, q5}, [%[b]]!\n"
+		  "	 vld1.32 {q8, q9}, [%[a]]!\n"
+		  "	 vld1.32 {q6, q7}, [%[b]]!\n"
+		  "	 vld1.32 {q10, q11}, [%[a]]!\n"
+		  "	 subs %[len], %[len], #16\n"
+		  "	 vmla.f32 q0, q4, q8\n"
+		  "	 vmla.f32 q1, q5, q9\n"
+		  "	 vmla.f32 q2, q6, q10\n"
+		  "	 vmla.f32 q3, q7, q11\n"
+		  "	 bne 2b\n"
+		  "3:"
+		  "	 vadd.f32 q4, q0, q1\n"
+		  "	 vadd.f32 q5, q2, q3\n"
+		  "	 cmp %[remainder], #0\n"
+		  "	 vadd.f32 q0, q4, q5\n"
+		  "	 beq 5f\n"
+		  "4:"
+		  "	 vld1.32 {q6}, [%[b]]!\n"
+		  "	 vld1.32 {q10}, [%[a]]!\n"
+		  "	 subs %[remainder], %[remainder], #4\n"
+		  "	 vmla.f32 q0, q6, q10\n"
+		  "	 bne 4b\n"
+		  "5:"
+		  "	 vadd.f32 d0, d0, d1\n"
+		  "	 vpadd.f32 d0, d0, d0\n"
+		  "	 vmov.f32 %[ret], d0[0]\n"
+		  : [ret] "=&r" (ret), [a] "+r" (a), [b] "+r" (b),
+		    [len] "+l" (len), [remainder] "+l" (remainder)
+		  :
+		  : "cc", "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8",
+                    "q9", "q10", "q11");
+    return ret;
+}
+#endif

dep/cubeb/src/speex/resample_sse.h

@@ -0,0 +1,128 @@
+/* Copyright (C) 2007-2008 Jean-Marc Valin
+ * Copyright (C) 2008 Thorvald Natvig
+ */
+/**
+   @file resample_sse.h
+   @brief Resampler functions (SSE version)
+*/
+/*
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   - Neither the name of the Xiph.org Foundation nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <xmmintrin.h>
+
+#define OVERRIDE_INNER_PRODUCT_SINGLE
+static inline float inner_product_single(const float *a, const float *b, unsigned int len)
+{
+   int i;
+   float ret;
+   __m128 sum = _mm_setzero_ps();
+   for (i=0;i<len;i+=8)
+   {
+      sum = _mm_add_ps(sum, _mm_mul_ps(_mm_loadu_ps(a+i), _mm_loadu_ps(b+i)));
+      sum = _mm_add_ps(sum, _mm_mul_ps(_mm_loadu_ps(a+i+4), _mm_loadu_ps(b+i+4)));
+   }
+   sum = _mm_add_ps(sum, _mm_movehl_ps(sum, sum));
+   sum = _mm_add_ss(sum, _mm_shuffle_ps(sum, sum, 0x55));
+   _mm_store_ss(&ret, sum);
+   return ret;
+}
+
+#define OVERRIDE_INTERPOLATE_PRODUCT_SINGLE
+static inline float interpolate_product_single(const float *a, const float *b, unsigned int len, const spx_uint32_t oversample, float *frac) {
+  int i;
+  float ret;
+  __m128 sum = _mm_setzero_ps();
+  __m128 f = _mm_loadu_ps(frac);
+  for(i=0;i<len;i+=2)
+  {
+    sum = _mm_add_ps(sum, _mm_mul_ps(_mm_load1_ps(a+i), _mm_loadu_ps(b+i*oversample)));
+    sum = _mm_add_ps(sum, _mm_mul_ps(_mm_load1_ps(a+i+1), _mm_loadu_ps(b+(i+1)*oversample)));
+  }
+   sum = _mm_mul_ps(f, sum);
+   sum = _mm_add_ps(sum, _mm_movehl_ps(sum, sum));
+   sum = _mm_add_ss(sum, _mm_shuffle_ps(sum, sum, 0x55));
+   _mm_store_ss(&ret, sum);
+   return ret;
+}
+
+#ifdef _USE_SSE2
+#include <emmintrin.h>
+#define OVERRIDE_INNER_PRODUCT_DOUBLE
+
+static inline double inner_product_double(const float *a, const float *b, unsigned int len)
+{
+   int i;
+   double ret;
+   __m128d sum = _mm_setzero_pd();
+   __m128 t;
+   for (i=0;i<len;i+=8)
+   {
+      t = _mm_mul_ps(_mm_loadu_ps(a+i), _mm_loadu_ps(b+i));
+      sum = _mm_add_pd(sum, _mm_cvtps_pd(t));
+      sum = _mm_add_pd(sum, _mm_cvtps_pd(_mm_movehl_ps(t, t)));
+
+      t = _mm_mul_ps(_mm_loadu_ps(a+i+4), _mm_loadu_ps(b+i+4));
+      sum = _mm_add_pd(sum, _mm_cvtps_pd(t));
+      sum = _mm_add_pd(sum, _mm_cvtps_pd(_mm_movehl_ps(t, t)));
+   }
+   sum = _mm_add_sd(sum, _mm_unpackhi_pd(sum, sum));
+   _mm_store_sd(&ret, sum);
+   return ret;
+}
+
+#define OVERRIDE_INTERPOLATE_PRODUCT_DOUBLE
+static inline double interpolate_product_double(const float *a, const float *b, unsigned int len, const spx_uint32_t oversample, float *frac) {
+  int i;
+  double ret;
+  __m128d sum;
+  __m128d sum1 = _mm_setzero_pd();
+  __m128d sum2 = _mm_setzero_pd();
+  __m128 f = _mm_loadu_ps(frac);
+  __m128d f1 = _mm_cvtps_pd(f);
+  __m128d f2 = _mm_cvtps_pd(_mm_movehl_ps(f,f));
+  __m128 t;
+  for(i=0;i<len;i+=2)
+  {
+    t = _mm_mul_ps(_mm_load1_ps(a+i), _mm_loadu_ps(b+i*oversample));
+    sum1 = _mm_add_pd(sum1, _mm_cvtps_pd(t));
+    sum2 = _mm_add_pd(sum2, _mm_cvtps_pd(_mm_movehl_ps(t, t)));
+
+    t = _mm_mul_ps(_mm_load1_ps(a+i+1), _mm_loadu_ps(b+(i+1)*oversample));
+    sum1 = _mm_add_pd(sum1, _mm_cvtps_pd(t));
+    sum2 = _mm_add_pd(sum2, _mm_cvtps_pd(_mm_movehl_ps(t, t)));
+  }
+  sum1 = _mm_mul_pd(f1, sum1);
+  sum2 = _mm_mul_pd(f2, sum2);
+  sum = _mm_add_pd(sum1, sum2);
+  sum = _mm_add_sd(sum, _mm_unpackhi_pd(sum, sum));
+  _mm_store_sd(&ret, sum);
+  return ret;
+}
+
+#endif

dep/cubeb/src/speex/speex_config_types.h

@@ -0,0 +1,10 @@
+#ifndef __SPEEX_TYPES_H__
+#define __SPEEX_TYPES_H__
+
+/* these are filled in by configure */
+typedef int16_t spx_int16_t;
+typedef uint16_t spx_uint16_t;
+typedef int32_t spx_int32_t;
+typedef uint32_t spx_uint32_t;
+
+ #endif

dep/cubeb/src/speex/speex_resampler.h

@@ -0,0 +1,343 @@
+/* Copyright (C) 2007 Jean-Marc Valin
+
+   File: speex_resampler.h
+   Resampling code
+
+   The design goals of this code are:
+      - Very fast algorithm
+      - Low memory requirement
+      - Good *perceptual* quality (and not best SNR)
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions are
+   met:
+
+   1. Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+   DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+   ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+   POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#ifndef SPEEX_RESAMPLER_H
+#define SPEEX_RESAMPLER_H
+
+#ifdef OUTSIDE_SPEEX
+
+/********* WARNING: MENTAL SANITY ENDS HERE *************/
+
+/* If the resampler is defined outside of Speex, we change the symbol names so that
+   there won't be any clash if linking with Speex later on. */
+
+/* #define RANDOM_PREFIX your software name here */
+#ifndef RANDOM_PREFIX
+#error "Please define RANDOM_PREFIX (above) to something specific to your project to prevent symbol name clashes"
+#endif
+
+#define CAT_PREFIX2(a,b) a ## b
+#define CAT_PREFIX(a,b) CAT_PREFIX2(a, b)
+
+#define speex_resampler_init CAT_PREFIX(RANDOM_PREFIX,_resampler_init)
+#define speex_resampler_init_frac CAT_PREFIX(RANDOM_PREFIX,_resampler_init_frac)
+#define speex_resampler_destroy CAT_PREFIX(RANDOM_PREFIX,_resampler_destroy)
+#define speex_resampler_process_float CAT_PREFIX(RANDOM_PREFIX,_resampler_process_float)
+#define speex_resampler_process_int CAT_PREFIX(RANDOM_PREFIX,_resampler_process_int)
+#define speex_resampler_process_interleaved_float CAT_PREFIX(RANDOM_PREFIX,_resampler_process_interleaved_float)
+#define speex_resampler_process_interleaved_int CAT_PREFIX(RANDOM_PREFIX,_resampler_process_interleaved_int)
+#define speex_resampler_set_rate CAT_PREFIX(RANDOM_PREFIX,_resampler_set_rate)
+#define speex_resampler_get_rate CAT_PREFIX(RANDOM_PREFIX,_resampler_get_rate)
+#define speex_resampler_set_rate_frac CAT_PREFIX(RANDOM_PREFIX,_resampler_set_rate_frac)
+#define speex_resampler_get_ratio CAT_PREFIX(RANDOM_PREFIX,_resampler_get_ratio)
+#define speex_resampler_set_quality CAT_PREFIX(RANDOM_PREFIX,_resampler_set_quality)
+#define speex_resampler_get_quality CAT_PREFIX(RANDOM_PREFIX,_resampler_get_quality)
+#define speex_resampler_set_input_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_set_input_stride)
+#define speex_resampler_get_input_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_get_input_stride)
+#define speex_resampler_set_output_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_set_output_stride)
+#define speex_resampler_get_output_stride CAT_PREFIX(RANDOM_PREFIX,_resampler_get_output_stride)
+#define speex_resampler_get_input_latency CAT_PREFIX(RANDOM_PREFIX,_resampler_get_input_latency)
+#define speex_resampler_get_output_latency CAT_PREFIX(RANDOM_PREFIX,_resampler_get_output_latency)
+#define speex_resampler_skip_zeros CAT_PREFIX(RANDOM_PREFIX,_resampler_skip_zeros)
+#define speex_resampler_reset_mem CAT_PREFIX(RANDOM_PREFIX,_resampler_reset_mem)
+#define speex_resampler_strerror CAT_PREFIX(RANDOM_PREFIX,_resampler_strerror)
+
+#define spx_int16_t short
+#define spx_int32_t int
+#define spx_uint16_t unsigned short
+#define spx_uint32_t unsigned int
+
+#define speex_assert(cond)
+
+#else /* OUTSIDE_SPEEX */
+
+#include "speexdsp_types.h"
+
+#endif /* OUTSIDE_SPEEX */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SPEEX_RESAMPLER_QUALITY_MAX 10
+#define SPEEX_RESAMPLER_QUALITY_MIN 0
+#define SPEEX_RESAMPLER_QUALITY_DEFAULT 4
+#define SPEEX_RESAMPLER_QUALITY_VOIP 3
+#define SPEEX_RESAMPLER_QUALITY_DESKTOP 5
+
+enum {
+   RESAMPLER_ERR_SUCCESS         = 0,
+   RESAMPLER_ERR_ALLOC_FAILED    = 1,
+   RESAMPLER_ERR_BAD_STATE       = 2,
+   RESAMPLER_ERR_INVALID_ARG     = 3,
+   RESAMPLER_ERR_PTR_OVERLAP     = 4,
+   RESAMPLER_ERR_OVERFLOW        = 5,
+
+   RESAMPLER_ERR_MAX_ERROR
+};
+
+struct SpeexResamplerState_;
+typedef struct SpeexResamplerState_ SpeexResamplerState;
+
+/** Create a new resampler with integer input and output rates.
+ * @param nb_channels Number of channels to be processed
+ * @param in_rate Input sampling rate (integer number of Hz).
+ * @param out_rate Output sampling rate (integer number of Hz).
+ * @param quality Resampling quality between 0 and 10, where 0 has poor quality
+ * and 10 has very high quality.
+ * @return Newly created resampler state
+ * @retval NULL Error: not enough memory
+ */
+SpeexResamplerState *speex_resampler_init(spx_uint32_t nb_channels,
+                                          spx_uint32_t in_rate,
+                                          spx_uint32_t out_rate,
+                                          int quality,
+                                          int *err);
+
+/** Create a new resampler with fractional input/output rates. The sampling
+ * rate ratio is an arbitrary rational number with both the numerator and
+ * denominator being 32-bit integers.
+ * @param nb_channels Number of channels to be processed
+ * @param ratio_num Numerator of the sampling rate ratio
+ * @param ratio_den Denominator of the sampling rate ratio
+ * @param in_rate Input sampling rate rounded to the nearest integer (in Hz).
+ * @param out_rate Output sampling rate rounded to the nearest integer (in Hz).
+ * @param quality Resampling quality between 0 and 10, where 0 has poor quality
+ * and 10 has very high quality.
+ * @return Newly created resampler state
+ * @retval NULL Error: not enough memory
+ */
+SpeexResamplerState *speex_resampler_init_frac(spx_uint32_t nb_channels,
+                                               spx_uint32_t ratio_num,
+                                               spx_uint32_t ratio_den,
+                                               spx_uint32_t in_rate,
+                                               spx_uint32_t out_rate,
+                                               int quality,
+                                               int *err);
+
+/** Destroy a resampler state.
+ * @param st Resampler state
+ */
+void speex_resampler_destroy(SpeexResamplerState *st);
+
+/** Resample a float array. The input and output buffers must *not* overlap.
+ * @param st Resampler state
+ * @param channel_index Index of the channel to process for the multi-channel
+ * base (0 otherwise)
+ * @param in Input buffer
+ * @param in_len Number of input samples in the input buffer. Returns the
+ * number of samples processed
+ * @param out Output buffer
+ * @param out_len Size of the output buffer. Returns the number of samples written
+ */
+int speex_resampler_process_float(SpeexResamplerState *st,
+                                   spx_uint32_t channel_index,
+                                   const float *in,
+                                   spx_uint32_t *in_len,
+                                   float *out,
+                                   spx_uint32_t *out_len);
+
+/** Resample an int array. The input and output buffers must *not* overlap.
+ * @param st Resampler state
+ * @param channel_index Index of the channel to process for the multi-channel
+ * base (0 otherwise)
+ * @param in Input buffer
+ * @param in_len Number of input samples in the input buffer. Returns the number
+ * of samples processed
+ * @param out Output buffer
+ * @param out_len Size of the output buffer. Returns the number of samples written
+ */
+int speex_resampler_process_int(SpeexResamplerState *st,
+                                 spx_uint32_t channel_index,
+                                 const spx_int16_t *in,
+                                 spx_uint32_t *in_len,
+                                 spx_int16_t *out,
+                                 spx_uint32_t *out_len);
+
+/** Resample an interleaved float array. The input and output buffers must *not* overlap.
+ * @param st Resampler state
+ * @param in Input buffer
+ * @param in_len Number of input samples in the input buffer. Returns the number
+ * of samples processed. This is all per-channel.
+ * @param out Output buffer
+ * @param out_len Size of the output buffer. Returns the number of samples written.
+ * This is all per-channel.
+ */
+int speex_resampler_process_interleaved_float(SpeexResamplerState *st,
+                                               const float *in,
+                                               spx_uint32_t *in_len,
+                                               float *out,
+                                               spx_uint32_t *out_len);
+
+/** Resample an interleaved int array. The input and output buffers must *not* overlap.
+ * @param st Resampler state
+ * @param in Input buffer
+ * @param in_len Number of input samples in the input buffer. Returns the number
+ * of samples processed. This is all per-channel.
+ * @param out Output buffer
+ * @param out_len Size of the output buffer. Returns the number of samples written.
+ * This is all per-channel.
+ */
+int speex_resampler_process_interleaved_int(SpeexResamplerState *st,
+                                             const spx_int16_t *in,
+                                             spx_uint32_t *in_len,
+                                             spx_int16_t *out,
+                                             spx_uint32_t *out_len);
+
+/** Set (change) the input/output sampling rates (integer value).
+ * @param st Resampler state
+ * @param in_rate Input sampling rate (integer number of Hz).
+ * @param out_rate Output sampling rate (integer number of Hz).
+ */
+int speex_resampler_set_rate(SpeexResamplerState *st,
+                              spx_uint32_t in_rate,
+                              spx_uint32_t out_rate);
+
+/** Get the current input/output sampling rates (integer value).
+ * @param st Resampler state
+ * @param in_rate Input sampling rate (integer number of Hz) copied.
+ * @param out_rate Output sampling rate (integer number of Hz) copied.
+ */
+void speex_resampler_get_rate(SpeexResamplerState *st,
+                              spx_uint32_t *in_rate,
+                              spx_uint32_t *out_rate);
+
+/** Set (change) the input/output sampling rates and resampling ratio
+ * (fractional values in Hz supported).
+ * @param st Resampler state
+ * @param ratio_num Numerator of the sampling rate ratio
+ * @param ratio_den Denominator of the sampling rate ratio
+ * @param in_rate Input sampling rate rounded to the nearest integer (in Hz).
+ * @param out_rate Output sampling rate rounded to the nearest integer (in Hz).
+ */
+int speex_resampler_set_rate_frac(SpeexResamplerState *st,
+                                   spx_uint32_t ratio_num,
+                                   spx_uint32_t ratio_den,
+                                   spx_uint32_t in_rate,
+                                   spx_uint32_t out_rate);
+
+/** Get the current resampling ratio. This will be reduced to the least
+ * common denominator.
+ * @param st Resampler state
+ * @param ratio_num Numerator of the sampling rate ratio copied
+ * @param ratio_den Denominator of the sampling rate ratio copied
+ */
+void speex_resampler_get_ratio(SpeexResamplerState *st,
+                               spx_uint32_t *ratio_num,
+                               spx_uint32_t *ratio_den);
+
+/** Set (change) the conversion quality.
+ * @param st Resampler state
+ * @param quality Resampling quality between 0 and 10, where 0 has poor
+ * quality and 10 has very high quality.
+ */
+int speex_resampler_set_quality(SpeexResamplerState *st,
+                                 int quality);
+
+/** Get the conversion quality.
+ * @param st Resampler state
+ * @param quality Resampling quality between 0 and 10, where 0 has poor
+ * quality and 10 has very high quality.
+ */
+void speex_resampler_get_quality(SpeexResamplerState *st,
+                                 int *quality);
+
+/** Set (change) the input stride.
+ * @param st Resampler state
+ * @param stride Input stride
+ */
+void speex_resampler_set_input_stride(SpeexResamplerState *st,
+                                      spx_uint32_t stride);
+
+/** Get the input stride.
+ * @param st Resampler state
+ * @param stride Input stride copied
+ */
+void speex_resampler_get_input_stride(SpeexResamplerState *st,
+                                      spx_uint32_t *stride);
+
+/** Set (change) the output stride.
+ * @param st Resampler state
+ * @param stride Output stride
+ */
+void speex_resampler_set_output_stride(SpeexResamplerState *st,
+                                      spx_uint32_t stride);
+
+/** Get the output stride.
+ * @param st Resampler state copied
+ * @param stride Output stride
+ */
+void speex_resampler_get_output_stride(SpeexResamplerState *st,
+                                      spx_uint32_t *stride);
+
+/** Get the latency introduced by the resampler measured in input samples.
+ * @param st Resampler state
+ */
+int speex_resampler_get_input_latency(SpeexResamplerState *st);
+
+/** Get the latency introduced by the resampler measured in output samples.
+ * @param st Resampler state
+ */
+int speex_resampler_get_output_latency(SpeexResamplerState *st);
+
+/** Make sure that the first samples to go out of the resamplers don't have
+ * leading zeros. This is only useful before starting to use a newly created
+ * resampler. It is recommended to use that when resampling an audio file, as
+ * it will generate a file with the same length. For real-time processing,
+ * it is probably easier not to use this call (so that the output duration
+ * is the same for the first frame).
+ * @param st Resampler state
+ */
+int speex_resampler_skip_zeros(SpeexResamplerState *st);
+
+/** Reset a resampler so a new (unrelated) stream can be processed.
+ * @param st Resampler state
+ */
+int speex_resampler_reset_mem(SpeexResamplerState *st);
+
+/** Returns the English meaning for an error code
+ * @param err Error code
+ * @return English string
+ */
+const char *speex_resampler_strerror(int err);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

dep/cubeb/src/speex/stack_alloc.h

@@ -0,0 +1,115 @@
+/* Copyright (C) 2002 Jean-Marc Valin */
+/**
+   @file stack_alloc.h
+   @brief Temporary memory allocation on stack
+*/
+/*
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+   - Neither the name of the Xiph.org Foundation nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+   A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
+   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#ifndef STACK_ALLOC_H
+#define STACK_ALLOC_H
+
+#ifdef USE_ALLOCA
+# ifdef WIN32
+#  include <malloc.h>
+# else
+#  ifdef HAVE_ALLOCA_H
+#   include <alloca.h>
+#  else
+#   include <stdlib.h>
+#  endif
+# endif
+#endif
+
+/**
+ * @def ALIGN(stack, size)
+ *
+ * Aligns the stack to a 'size' boundary
+ *
+ * @param stack Stack
+ * @param size  New size boundary
+ */
+
+/**
+ * @def PUSH(stack, size, type)
+ *
+ * Allocates 'size' elements of type 'type' on the stack
+ *
+ * @param stack Stack
+ * @param size  Number of elements
+ * @param type  Type of element
+ */
+
+/**
+ * @def VARDECL(var)
+ *
+ * Declare variable on stack
+ *
+ * @param var Variable to declare
+ */
+
+/**
+ * @def ALLOC(var, size, type)
+ *
+ * Allocate 'size' elements of 'type' on stack
+ *
+ * @param var  Name of variable to allocate
+ * @param size Number of elements
+ * @param type Type of element
+ */
+
+#ifdef ENABLE_VALGRIND
+
+#include <valgrind/memcheck.h>
+
+#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
+
+#define PUSH(stack, size, type) (VALGRIND_MAKE_NOACCESS(stack, 1000),ALIGN((stack),sizeof(type)),VALGRIND_MAKE_WRITABLE(stack, ((size)*sizeof(type))),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type))))
+
+#else
+
+#define ALIGN(stack, size) ((stack) += ((size) - (long)(stack)) & ((size) - 1))
+
+#define PUSH(stack, size, type) (ALIGN((stack),sizeof(type)),(stack)+=((size)*sizeof(type)),(type*)((stack)-((size)*sizeof(type))))
+
+#endif
+
+#if defined(VAR_ARRAYS)
+#define VARDECL(var)
+#define ALLOC(var, size, type) type var[size]
+#elif defined(USE_ALLOCA)
+#define VARDECL(var) var
+#define ALLOC(var, size, type) var = alloca(sizeof(type)*(size))
+#else
+#define VARDECL(var) var
+#define ALLOC(var, size, type) var = PUSH(stack, size, type)
+#endif
+
+
+#endif

duckstation.sln

@@ -27,6 +27,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "tinyxml2", "dep\tinyxml2\ti
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "duckstation-qt", "src\duckstation-qt\duckstation-qt.vcxproj", "{28F14272-0EC4-41BB-849F-182ADB81AF70}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "cubeb", "dep\cubeb\cubeb.vcxproj", "{72F9423C-91EE-4487-AAC6-555ED6F61AA1}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x64 = Debug|x64
@@ -211,6 +213,22 @@ Global
 		{28F14272-0EC4-41BB-849F-182ADB81AF70}.ReleaseLTCG|x64.ActiveCfg = ReleaseLTCG|x64
 		{28F14272-0EC4-41BB-849F-182ADB81AF70}.ReleaseLTCG|x86.ActiveCfg = ReleaseLTCG|Win32
 		{28F14272-0EC4-41BB-849F-182ADB81AF70}.ReleaseLTCG|x86.Build.0 = ReleaseLTCG|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Debug|x64.ActiveCfg = Debug|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Debug|x64.Build.0 = Debug|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Debug|x86.ActiveCfg = Debug|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Debug|x86.Build.0 = Debug|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.DebugFast|x64.ActiveCfg = DebugFast|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.DebugFast|x64.Build.0 = DebugFast|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.DebugFast|x86.ActiveCfg = DebugFast|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.DebugFast|x86.Build.0 = DebugFast|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Release|x64.ActiveCfg = Release|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Release|x64.Build.0 = Release|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Release|x86.ActiveCfg = Release|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.Release|x86.Build.0 = Release|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.ReleaseLTCG|x64.ActiveCfg = ReleaseLTCG|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.ReleaseLTCG|x64.Build.0 = ReleaseLTCG|x64
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.ReleaseLTCG|x86.ActiveCfg = ReleaseLTCG|Win32
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1}.ReleaseLTCG|x86.Build.0 = ReleaseLTCG|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -223,6 +241,7 @@ Global
 		{ACE32F47-2960-4FB3-9F77-2C375625BF61} = {BA490C0E-497D-4634-A21E-E65012006385}
 		{3773F4CC-614E-4028-8595-22E08CA649E3} = {BA490C0E-497D-4634-A21E-E65012006385}
 		{933118A9-68C5-47B4-B151-B03C93961623} = {BA490C0E-497D-4634-A21E-E65012006385}
+		{72F9423C-91EE-4487-AAC6-555ED6F61AA1} = {BA490C0E-497D-4634-A21E-E65012006385}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {26E40B32-7C1D-48D0-95F4-1A500E054028}

src/common/audio_stream.h

@@ -41,6 +41,10 @@ public:
   void WriteSamples(const SampleType* samples, u32 num_samples);
   void EndWrite(u32 num_samples);
 
+  static std::unique_ptr<AudioStream> CreateNullAudioStream();
+
+  static std::unique_ptr<AudioStream> CreateCubebAudioStream();
+
 protected:
   virtual bool OpenDevice() = 0;
   virtual void PauseDevice(bool paused) = 0;

src/common/common.vcxproj

@@ -42,6 +42,7 @@
     <ClInclude Include="byte_stream.h" />
     <ClInclude Include="cd_image.h" />
     <ClInclude Include="cpu_detect.h" />
+    <ClInclude Include="cubeb_audio_stream.h" />
     <ClInclude Include="d3d11\shader_compiler.h" />
     <ClInclude Include="d3d11\staging_texture.h" />
     <ClInclude Include="d3d11\stream_buffer.h" />
@@ -74,6 +75,7 @@
     <ClCompile Include="cd_image.cpp" />
     <ClCompile Include="cd_image_bin.cpp" />
     <ClCompile Include="cd_image_cue.cpp" />
+    <ClCompile Include="cubeb_audio_stream.cpp" />
     <ClCompile Include="d3d11\shader_compiler.cpp" />
     <ClCompile Include="d3d11\staging_texture.cpp" />
     <ClCompile Include="d3d11\stream_buffer.cpp" />
@@ -99,6 +101,9 @@
     <Natvis Include="bitfield.natvis" />
   </ItemGroup>
   <ItemGroup>
+    <ProjectReference Include="..\..\dep\cubeb\cubeb.vcxproj">
+      <Project>{72f9423c-91ee-4487-aac6-555ed6f61aa1}</Project>
+    </ProjectReference>
     <ProjectReference Include="..\..\dep\glad\glad.vcxproj">
       <Project>{43540154-9e1e-409c-834f-b84be5621388}</Project>
     </ProjectReference>
@@ -243,7 +248,7 @@
       <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <ConformanceMode>true</ConformanceMode>
@@ -269,7 +274,7 @@
       <PreprocessorDefinitions>_ITERATOR_DEBUG_LEVEL=1;WIN32;_DEBUGFAST;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <BasicRuntimeChecks>Default</BasicRuntimeChecks>
       <SupportJustMyCode>false</SupportJustMyCode>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
@@ -298,7 +303,7 @@
       <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <ConformanceMode>true</ConformanceMode>
@@ -324,7 +329,7 @@
       <PreprocessorDefinitions>_ITERATOR_DEBUG_LEVEL=1;WIN32;_DEBUGFAST;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <BasicRuntimeChecks>Default</BasicRuntimeChecks>
       <SupportJustMyCode>false</SupportJustMyCode>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
@@ -354,7 +359,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <WholeProgramOptimization>false</WholeProgramOptimization>
@@ -384,7 +389,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <OmitFramePointers>true</OmitFramePointers>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
@@ -414,7 +419,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <WholeProgramOptimization>false</WholeProgramOptimization>
@@ -444,7 +449,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
-      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>$(SolutionDir)dep\glad\include;$(SolutionDir)dep\cubeb\include;$(SolutionDir)dep\libcue\include;$(SolutionDir)src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <OmitFramePointers>true</OmitFramePointers>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>

src/common/common.vcxproj.filters

@@ -46,6 +46,7 @@
     <ClInclude Include="string_util.h" />
     <ClInclude Include="md5_digest.h" />
     <ClInclude Include="cpu_detect.h" />
+    <ClInclude Include="cubeb_audio_stream.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="jit_code_buffer.cpp" />
@@ -88,6 +89,7 @@
     <ClCompile Include="file_system.cpp" />
     <ClCompile Include="string_util.cpp" />
     <ClCompile Include="md5_digest.cpp" />
+    <ClCompile Include="cubeb_audio_stream.cpp" />
   </ItemGroup>
   <ItemGroup>
     <Natvis Include="bitfield.natvis" />

src/common/cubeb_audio_stream.cpp

@@ -0,0 +1,120 @@
+#include "cubeb_audio_stream.h"
+#include "common/assert.h"
+#include "common/log.h"
+Log_SetChannel(CubebAudioStream);
+
+CubebAudioStream::CubebAudioStream() = default;
+
+CubebAudioStream::~CubebAudioStream()
+{
+  if (IsOpen())
+    CubebAudioStream::CloseDevice();
+}
+
+bool CubebAudioStream::OpenDevice()
+{
+  Assert(!IsOpen());
+
+  int rv = cubeb_init(&m_cubeb_context, "DuckStation", nullptr);
+  if (rv != CUBEB_OK)
+  {
+    Log_ErrorPrintf("Could not initialize cubeb context: %d", rv);
+    return false;
+  }
+
+  cubeb_stream_params params = {};
+  params.format = CUBEB_SAMPLE_S16LE;
+  params.rate = m_output_sample_rate;
+  params.channels = m_channels;
+  params.layout = CUBEB_LAYOUT_UNDEFINED;
+  params.prefs = CUBEB_STREAM_PREF_NONE;
+
+  u32 latency_frames = 0;
+  rv = cubeb_get_min_latency(m_cubeb_context, &params, &latency_frames);
+  if (rv != CUBEB_OK)
+  {
+    Log_ErrorPrintf("Could not get minimum latency: %d", rv);
+    cubeb_destroy(m_cubeb_context);
+    m_cubeb_context = nullptr;
+    return false;
+  }
+
+  Log_InfoPrintf("Minimum latency in frames: %u", latency_frames);
+  if (latency_frames > m_buffer_size)
+    Log_WarningPrintf("Minimum latency is above buffer size: %u vs %u", latency_frames, m_buffer_size);
+  else
+    latency_frames = m_buffer_size;
+
+  char stream_name[32];
+  std::snprintf(stream_name, sizeof(stream_name), "AudioStream_%p", this);
+
+  rv = cubeb_stream_init(m_cubeb_context, &m_cubeb_stream, stream_name, nullptr, nullptr, nullptr, &params,
+                         latency_frames, DataCallback, StateCallback, this);
+  if (rv != CUBEB_OK)
+  {
+    Log_ErrorPrintf("Could not create stream: %d", rv);
+    cubeb_destroy(m_cubeb_context);
+    m_cubeb_context = nullptr;
+    return false;
+  }
+
+  return true;
+}
+
+void CubebAudioStream::PauseDevice(bool paused)
+{
+  if (paused == m_paused)
+    return;
+
+  int rv = paused ? cubeb_stream_stop(m_cubeb_stream) : cubeb_stream_start(m_cubeb_stream);
+  if (rv != CUBEB_OK)
+  {
+    Log_ErrorPrintf("cubeb_stream_%s failed: %d", paused ? "stop" : "start", rv);
+    return;
+  }
+}
+
+void CubebAudioStream::CloseDevice()
+{
+  Assert(IsOpen());
+
+  if (!m_paused)
+    cubeb_stream_stop(m_cubeb_stream);
+
+  cubeb_stream_destroy(m_cubeb_stream);
+  m_cubeb_stream = nullptr;
+
+  cubeb_destroy(m_cubeb_context);
+  m_cubeb_context = nullptr;
+}
+
+long CubebAudioStream::DataCallback(cubeb_stream* stm, void* user_ptr, const void* input_buffer, void* output_buffer,
+                                    long nframes)
+{
+  CubebAudioStream* const this_ptr = static_cast<CubebAudioStream*>(user_ptr);
+
+  const u32 read_frames =
+    this_ptr->ReadSamples(reinterpret_cast<SampleType*>(output_buffer), static_cast<u32>(nframes));
+  const u32 silence_frames = static_cast<u32>(nframes) - read_frames;
+  if (silence_frames > 0)
+  {
+    std::memset(reinterpret_cast<SampleType*>(output_buffer) + (read_frames * this_ptr->m_channels), 0,
+                silence_frames * this_ptr->m_channels * sizeof(SampleType));
+  }
+
+  return nframes;
+}
+
+void CubebAudioStream::StateCallback(cubeb_stream* stream, void* user_ptr, cubeb_state state)
+{
+  CubebAudioStream* const this_ptr = static_cast<CubebAudioStream*>(user_ptr);
+
+  this_ptr->m_paused = (state != CUBEB_STATE_STARTED);
+}
+
+void CubebAudioStream::BufferAvailable() {}
+
+std::unique_ptr<AudioStream> AudioStream::CreateCubebAudioStream()
+{
+  return std::make_unique<CubebAudioStream>();
+}

src/common/cubeb_audio_stream.h

@@ -0,0 +1,27 @@
+#pragma once
+#include "common/audio_stream.h"
+#include "cubeb/cubeb.h"
+#include <cstdint>
+
+class CubebAudioStream final : public AudioStream
+{
+public:
+  CubebAudioStream();
+  ~CubebAudioStream();
+
+protected:
+  bool IsOpen() const { return m_cubeb_stream != nullptr; }
+
+  bool OpenDevice() override;
+  void PauseDevice(bool paused) override;
+  void CloseDevice() override;
+  void BufferAvailable() override;
+
+  static long DataCallback(cubeb_stream* stm, void* user_ptr, const void* input_buffer, void* output_buffer,
+                           long nframes);
+  static void StateCallback(cubeb_stream* stream, void* user_ptr, cubeb_state state);
+
+  cubeb* m_cubeb_context = nullptr;
+  cubeb_stream* m_cubeb_stream = nullptr;
+  bool m_paused = true;
+};

src/common/null_audio_stream.cpp

@@ -19,7 +19,7 @@ void NullAudioStream::BufferAvailable()
   DropBuffer();
 }
 
-std::unique_ptr<AudioStream> NullAudioStream::Create()
+std::unique_ptr<AudioStream> AudioStream::CreateNullAudioStream()
 {
-  return std::unique_ptr<AudioStream>(new NullAudioStream());
+  return std::make_unique<NullAudioStream>();
 }

src/common/null_audio_stream.h

@@ -4,16 +4,12 @@
 class NullAudioStream final : public AudioStream
 {
 public:
+  NullAudioStream();
   ~NullAudioStream();
 
-  static std::unique_ptr<AudioStream> Create();
-
 protected:
   bool OpenDevice() override;
   void PauseDevice(bool paused) override;
   void CloseDevice() override;
   void BufferAvailable() override;
-
-private:
-  NullAudioStream();
 };

src/core/types.h

@@ -53,6 +53,7 @@ enum class AudioBackend : u8
 {
   Null,
   Default,
+  Cubeb,
   Count
 };
 

src/duckstation-qt/qthostinterface.cpp

@@ -2,7 +2,6 @@
 #include "common/assert.h"
 #include "common/byte_stream.h"
 #include "common/log.h"
-#include "common/null_audio_stream.h"
 #include "common/string_util.h"
 #include "core/controller.h"
 #include "core/game_list.h"
@@ -28,7 +27,6 @@ QtHostInterface::QtHostInterface(QObject* parent)
   checkSettings();
   createGameList();
   doUpdateInputMap();
-  createAudioStream();
   createThread();
 }
 
@@ -446,15 +444,26 @@ void QtHostInterface::doBootSystem(QString initial_filename, QString initial_sav
 
 void QtHostInterface::createAudioStream()
 {
-  // Qt at least on Windows seems to want a buffer size of at least 8KB.
+  switch (m_settings.audio_backend)
-  // m_audio_stream = QtAudioStream::Create();
+  {
-  // if (!m_audio_stream->Reconfigure(AUDIO_SAMPLE_RATE, AUDIO_CHANNELS, AUDIO_BUFFER_SIZE, 4))
+    case AudioBackend::Default:
+    case AudioBackend::Cubeb:
+      m_audio_stream = AudioStream::CreateCubebAudioStream();
+      break;
+
+    case AudioBackend::Null:
+    default:
+      m_audio_stream = AudioStream::CreateNullAudioStream();
+      break;
+  }
+
+  if (!m_audio_stream->Reconfigure(AUDIO_SAMPLE_RATE, AUDIO_CHANNELS, AUDIO_BUFFER_SIZE, 4))
   {
     qWarning() << "Failed to configure audio stream, falling back to null output";
 
     // fall back to null output
     m_audio_stream.reset();
-    m_audio_stream = NullAudioStream::Create();
+    m_audio_stream = AudioStream::CreateNullAudioStream();
     m_audio_stream->Reconfigure(AUDIO_SAMPLE_RATE, AUDIO_CHANNELS, AUDIO_BUFFER_SIZE, 4);
   }
 }
@@ -483,6 +492,10 @@ void QtHostInterface::doStopThread()
 void QtHostInterface::threadEntryPoint()
 {
   m_worker_thread_event_loop = new QEventLoop();
+
+  createAudioStream();
+
+  // TODO: Event which flags the thread as ready
   while (!m_shutdown_flag.load())
   {
     if (!m_system || m_paused)
@@ -525,6 +538,7 @@ void QtHostInterface::threadEntryPoint()
   }
 
   m_system.reset();
+  m_audio_stream.reset();
   delete m_worker_thread_event_loop;
   m_worker_thread_event_loop = nullptr;
 

src/duckstation/sdl_host_interface.cpp

@@ -2,7 +2,6 @@
 #include "common/assert.h"
 #include "common/byte_stream.h"
 #include "common/log.h"
-#include "common/null_audio_stream.h"
 #include "common/string_util.h"
 #include "core/controller.h"
 #include "core/gpu.h"
@@ -126,7 +125,11 @@ void SDLHostInterface::CreateAudioStream()
   switch (m_settings.audio_backend)
   {
     case AudioBackend::Null:
-      m_audio_stream = NullAudioStream::Create();
+      m_audio_stream = AudioStream::CreateNullAudioStream();
+      break;
+
+    case AudioBackend::Cubeb:
+      m_audio_stream = AudioStream::CreateCubebAudioStream();
       break;
 
     case AudioBackend::Default:
@@ -139,7 +142,7 @@ void SDLHostInterface::CreateAudioStream()
   {
     ReportError("Failed to recreate audio stream, falling back to null");
     m_audio_stream.reset();
-    m_audio_stream = NullAudioStream::Create();
+    m_audio_stream = AudioStream::CreateNullAudioStream();
     if (!m_audio_stream->Reconfigure(AUDIO_SAMPLE_RATE, AUDIO_CHANNELS))
       Panic("Failed to reconfigure null audio stream");
   }