mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-23 22:25:42 +00:00
94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
#include "sdl_audio_stream.h"
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#include "common/assert.h"
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#include "common/log.h"
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#include "sdl_initializer.h"
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#include <SDL.h>
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Log_SetChannel(SDLAudioStream);
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SDLAudioStream::SDLAudioStream() = default;
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SDLAudioStream::~SDLAudioStream()
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{
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if (IsOpen())
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SDLAudioStream::CloseDevice();
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}
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std::unique_ptr<SDLAudioStream> SDLAudioStream::Create()
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{
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return std::make_unique<SDLAudioStream>();
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}
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bool SDLAudioStream::OpenDevice()
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{
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DebugAssert(!IsOpen());
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FrontendCommon::EnsureSDLInitialized();
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if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0)
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{
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Log_ErrorPrintf("SDL_InitSubSystem(SDL_INIT_AUDIO) failed");
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return false;
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}
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SDL_AudioSpec spec = {};
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spec.freq = m_output_sample_rate;
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spec.channels = static_cast<Uint8>(m_channels);
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spec.format = AUDIO_S16;
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spec.samples = static_cast<Uint16>(m_buffer_size);
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spec.callback = AudioCallback;
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spec.userdata = static_cast<void*>(this);
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SDL_AudioSpec obtained_spec = {};
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#ifdef SDL_AUDIO_ALLOW_SAMPLES_CHANGE
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const u32 allowed_change_flags = SDL_AUDIO_ALLOW_SAMPLES_CHANGE;
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#else
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const u32 allowed_change_flags = 0;
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#endif
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m_device_id = SDL_OpenAudioDevice(nullptr, 0, &spec, &obtained_spec, allowed_change_flags);
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if (m_device_id == 0)
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{
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Log_ErrorPrintf("SDL_OpenAudioDevice() failed: %s", SDL_GetError());
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SDL_QuitSubSystem(SDL_INIT_AUDIO);
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return false;
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}
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if (obtained_spec.samples > spec.samples)
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{
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Log_WarningPrintf("Requested buffer size %u, got buffer size %u. Adjusting to compensate.", spec.samples,
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obtained_spec.samples);
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if (!SetBufferSize(obtained_spec.samples))
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{
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Log_ErrorPrintf("Failed to set new buffer size of %u", obtained_spec.samples);
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CloseDevice();
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return false;
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}
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}
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return true;
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}
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void SDLAudioStream::PauseDevice(bool paused)
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{
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SDL_PauseAudioDevice(m_device_id, paused ? 1 : 0);
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}
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void SDLAudioStream::CloseDevice()
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{
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SDL_CloseAudioDevice(m_device_id);
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SDL_QuitSubSystem(SDL_INIT_AUDIO);
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m_device_id = 0;
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}
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void SDLAudioStream::AudioCallback(void* userdata, uint8_t* stream, int len)
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{
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SDLAudioStream* const this_ptr = static_cast<SDLAudioStream*>(userdata);
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const u32 num_frames = len / sizeof(SampleType) / this_ptr->m_channels;
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this_ptr->ReadFrames(reinterpret_cast<SampleType*>(stream), num_frames, true);
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}
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void SDLAudioStream::FramesAvailable() {}
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