CoreAudio::HLE: Add FFmpeg aac decoder

src/audio_core/CMakeLists.txt

@@ -5,6 +5,8 @@ add_library(audio_core STATIC
     dsp_interface.cpp
     dsp_interface.h
     hle/common.h
+    hle/decoder.cpp
+    hle/decoder.h
     hle/filter.cpp
     hle/filter.h
     hle/hle.cpp
@@ -27,6 +29,7 @@ add_library(audio_core STATIC
 
     $<$<BOOL:${SDL2_FOUND}>:sdl2_sink.cpp sdl2_sink.h>
     $<$<BOOL:${ENABLE_CUBEB}>:cubeb_sink.cpp cubeb_sink.h>
+    $<$<BOOL:${FFMPEG_FOUND}>:hle/aac_decoder.cpp hle/aac_decoder.h hle/ffmpeg_dl.h>
 )
 
 create_target_directory_groups(audio_core)
@@ -43,3 +46,13 @@ if(ENABLE_CUBEB)
     target_link_libraries(audio_core PRIVATE cubeb)
     add_definitions(-DHAVE_CUBEB=1)
 endif()
+
+if(FFMPEG_FOUND)
+    if(UNIX)
+        target_link_libraries(audio_core PRIVATE FFmpeg::avcodec)
+    else()
+        target_include_directories(audio_core PRIVATE  ${FFMPEG_DIR}/include)
+    endif()
+    target_compile_definitions(audio_core PRIVATE HAVE_FFMPEG)
+endif()
+