Add an ffmpeg-based example player

This example shows proper timing and A/V synchronization with an OpenAL stream.
Requires the in-progress AL_SOFTX_source_length extension to avoid manually
keeping track of the buffer queue length.

1 files changed, 43 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 27ec7209..bc0f51d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -907,6 +907,10 @@ IF(ALSOFT_EXAMPLES)
         IF(SDL_SOUND_FOUND AND CMAKE_VERSION VERSION_LESS "2.8.8")
             INCLUDE_DIRECTORIES(${SDL2_INCLUDE_DIR} ${SDL_SOUND_INCLUDE_DIR})
         ENDIF()
+        FIND_PACKAGE(FFmpeg COMPONENTS AVFORMAT AVCODEC AVUTIL SWSCALE SWRESAMPLE)
+        IF(FFMPEG_FOUND AND CMAKE_VERSION VERSION_LESS "2.8.8")
+            INCLUDE_DIRECTORIES(${FFMPEG_INCLUDE_DIRS})
+        ENDIF()
     ENDIF()
 ENDIF()
 
@@ -1088,7 +1092,45 @@ IF(ALSOFT_EXAMPLES)
                 ARCHIVE DESTINATION "lib${LIB_SUFFIX}"
         )
 
-        MESSAGE(STATUS "Building example programs")
+        SET(FFVER_OK FALSE)
+        IF(FFMPEG_FOUND)
+            SET(FFVER_OK TRUE)
+            IF(AVFORMAT_VERSION VERSION_LESS "55.33.100")
+                MESSAGE(STATUS "libavformat is too old! (${AVFORMAT_VERSION}, wanted 55.33.100)")
+                SET(FFVER_OK FALSE)
+            ENDIF()
+            IF(AVCODEC_VERSION VERSION_LESS "55.52.102")
+                MESSAGE(STATUS "libavcodec is too old! (${AVCODEC_VERSION}, wanted 55.52.102)")
+                SET(FFVER_OK FALSE)
+            ENDIF()
+            IF(AVUTIL_VERSION VERSION_LESS "52.66.100")
+                MESSAGE(STATUS "libavutil is too old! (${AVUTIL_VERSION}, wanted 52.66.100)")
+                SET(FFVER_OK FALSE)
+            ENDIF()
+            IF(SWSCALE_VERSION VERSION_LESS "2.5.102")
+                MESSAGE(STATUS "libswscale is too old! (${SWSCALE_VERSION}, wanted 2.5.102)")
+                SET(FFVER_OK FALSE)
+            ENDIF()
+            IF(SWRESAMPLE_VERSION VERSION_LESS "0.18.100")
+                MESSAGE(STATUS "libswresample is too old! (${SWRESAMPLE_VERSION}, wanted 0.18.100)")
+                SET(FFVER_OK FALSE)
+            ENDIF()
+        ENDIF()
+        IF(FFVER_OK AND NOT MSVC)
+            ADD_EXECUTABLE(alffplay examples/alffplay.c)
+            TARGET_LINK_LIBRARIES(alffplay common ex-common ${SDL2_LIBRARY} ${LIBNAME} ${FFMPEG_LIBRARIES})
+            SET_PROPERTY(TARGET alffplay APPEND PROPERTY INCLUDE_DIRECTORIES ${SDL2_INCLUDE_DIR}
+                                                                             ${FFMPEG_INCLUDE_DIRS})
+
+            INSTALL(TARGETS alffplay
+                    RUNTIME DESTINATION bin
+                    LIBRARY DESTINATION "lib${LIB_SUFFIX}"
+                    ARCHIVE DESTINATION "lib${LIB_SUFFIX}"
+            )
+            MESSAGE(STATUS "Building SDL and FFmpeg example programs")
+        ELSE()
+            MESSAGE(STATUS "Building SDL example programs")
+        ENDIF()
         MESSAGE(STATUS "")
     ENDIF()
 ENDIF()