From 63369ce48d3c599a4281e9ce6e001c5143776edc Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Fri, 14 May 2021 10:14:14 +0200
Subject: [PATCH] Made the FFmpeg CMake find module work properly on NetBSD.

---
 CMake/Packages/FindFFmpeg.cmake | 75 ++++++++++++---------------------
 1 file changed, 28 insertions(+), 47 deletions(-)

diff --git a/CMake/Packages/FindFFmpeg.cmake b/CMake/Packages/FindFFmpeg.cmake
index 01bbf84ca..8595e7b92 100644
--- a/CMake/Packages/FindFFmpeg.cmake
+++ b/CMake/Packages/FindFFmpeg.cmake
@@ -7,9 +7,9 @@
 # $FFMPEG_DIR is an environment variable that would
 # correspond to the ./configure --prefix=$FFMPEG_DIR
 #
-# Created by Robert Osfield.
-# Modified by Lukas Lalinsky.
-# Modified by Leon Styhre.
+# Created by Robert Osfield
+# Modified by Lukas Lalinsky
+# Modified by Leon Styhre
 
 # In ffmpeg code, old version use "#include <header.h>" and newer use "#include <libname/header.h>"
 # In OSG ffmpeg plugin, we use "#include <header.h>" for compatibility with old version of ffmpeg
@@ -25,58 +25,43 @@
 
 # Macro to find header and lib directories
 # example: FFMPEG_FIND(AVFORMAT avformat avformat.h)
-MACRO(FFMPEG_FIND varname shortname headername)
+macro(FFMPEG_FIND varname shortname headername)
 
-    FIND_PATH(FFMPEG_${varname}_INCLUDE_DIRS lib${shortname}/${headername}
+    find_path(FFMPEG_${varname}_INCLUDE_DIRS lib${shortname}/${headername}
         PATHS
         ${FFMPEG_ROOT}/include
         $ENV{FFMPEG_DIR}/include
         ~/Library/Frameworks
         /Library/Frameworks
         /usr/local/include
-        /usr/include/
+        /usr/pkg/include # NetBSD
+        /usr/include
         /sw/include # Fink
         /opt/local/include # DarwinPorts
         /opt/csw/include # Blastwave
         /opt/include
         /usr/freeware/include
         NO_DEFAULT_PATH
-        PATH_SUFFIXES ffmpeg
-        DOC "Location of FFMPEG Headers"
-    )
-    FIND_PATH(FFMPEG_${varname}_INCLUDE_DIRS lib${shortname}/${headername}
-        PATH_SUFFIXES ffmpeg
+        PATH_SUFFIXES
+        ffmpeg
+        ffmpeg4 # NetBSD
         DOC "Location of FFMPEG Headers"
     )
 
+    if(${CMAKE_SYSTEM_NAME} MATCHES "NetBSD")
+        set(ENV{PKG_CONFIG_PATH} "$ENV{PKG_CONFIG_PATH}:/usr/pkg/lib/ffmpeg4/pkgconfig")
+    endif()
+
     pkg_check_modules(FFMPEG_${varname} lib${shortname} REQUIRED)
 
-    IF (FFMPEG_${varname}_LIBRARIES AND FFMPEG_${varname}_INCLUDE_DIRS)
-        SET(FFMPEG_${varname}_FOUND 1)
-        MESSAGE("--   " ${FFMPEG_${varname}_LINK_LIBRARIES})
-    ENDIF(FFMPEG_${varname}_LIBRARIES AND FFMPEG_${varname}_INCLUDE_DIRS)
+    if(FFMPEG_${varname}_LIBRARIES AND FFMPEG_${varname}_INCLUDE_DIRS)
+        set(FFMPEG_${varname}_FOUND 1)
+        message("--   " ${FFMPEG_${varname}_LINK_LIBRARIES})
+    endif(FFMPEG_${varname}_LIBRARIES AND FFMPEG_${varname}_INCLUDE_DIRS)
 
-ENDMACRO(FFMPEG_FIND)
+endmacro(FFMPEG_FIND)
 
-SET(FFMPEG_ROOT "$ENV{FFMPEG_DIR}" CACHE PATH "Location of FFMPEG")
-
-# find stdint.h
-FIND_PATH(FFMPEG_STDINT_INCLUDE_DIR stdint.h
-    PATHS
-    ${FFMPEG_ROOT}/include
-    $ENV{FFMPEG_DIR}/include
-    ~/Library/Frameworks
-    /Library/Frameworks
-    /usr/local/include
-    /usr/include
-    /sw/include # Fink
-    /opt/local/include # DarwinPorts
-    /opt/csw/include # Blastwave
-    /opt/include
-    /usr/freeware/include
-    PATH_SUFFIXES ffmpeg
-    DOC "Location of FFMPEG stdint.h Header"
-)
+set(FFMPEG_ROOT "$ENV{FFMPEG_DIR}" CACHE PATH "Location of FFMPEG")
 
 FFMPEG_FIND(LIBAVFORMAT avformat avformat.h)
 FFMPEG_FIND(LIBAVCODEC avcodec avcodec.h)
@@ -85,23 +70,19 @@ FFMPEG_FIND(LIBAVUTIL avutil avutil.h)
 FFMPEG_FIND(LIBSWRESAMPLE swresample  swresample.h)
 FFMPEG_FIND(LIBSWSCALE swscale swscale.h) # Not sure about the header to look for here.
 
-SET(FFMPEG_FOUND "NO")
+set(FFMPEG_FOUND "NO")
 
-IF (FFMPEG_LIBAVFORMAT_FOUND AND FFMPEG_LIBAVCODEC_FOUND AND FFMPEG_LIBAVUTIL_FOUND AND
-    FFMPEG_LIBSWRESAMPLE_FOUND AND FFMPEG_LIBSWSCALE_FOUND AND FFMPEG_STDINT_INCLUDE_DIR)
+if(FFMPEG_LIBAVFORMAT_FOUND AND FFMPEG_LIBAVCODEC_FOUND AND FFMPEG_LIBAVUTIL_FOUND AND
+    FFMPEG_LIBSWRESAMPLE_FOUND AND FFMPEG_LIBSWSCALE_FOUND)
 
-    SET(FFMPEG_FOUND "YES")
-    SET(FFMPEG_INCLUDE_DIRS ${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS})
-    SET(FFMPEG_LIBRARY_DIRS ${FFMPEG_LIBAVFORMAT_LIBRARY_DIRS})
+    set(FFMPEG_FOUND "YES")
+    set(FFMPEG_INCLUDE_DIRS ${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS})
+    set(FFMPEG_LIBRARY_DIRS ${FFMPEG_LIBAVFORMAT_LIBRARY_DIRS})
 
-    SET(FFMPEG_LIBRARIES
+    set(FFMPEG_LIBRARIES
         ${FFMPEG_LIBAVFORMAT_LINK_LIBRARIES}
         ${FFMPEG_LIBAVCODEC_LINK_LIBRARIES}
         ${FFMPEG_LIBAVUTIL_LINK_LIBRARIES}
         ${FFMPEG_LIBSWRESAMPLE_LINK_LIBRARIES}
         ${FFMPEG_LIBSWSCALE_LINK_LIBRARIES})
-ELSE ()
-
-# MESSAGE(STATUS "Could not find FFMPEG")
-
-ENDIF()
+endif()