Add a side data type for audio service type.

Currently, audio service type is a field in AVCodecContext. However,
side data is more appropriate for this kind of information.

libavcodec/avcodec.h

@@ -917,6 +917,12 @@ enum AVPacketSideDataType {
      * Stereoscopic 3D information in form of the AVStereo3D struct.
      */
     AV_PKT_DATA_STEREO3D,
+
+    /**
+     * This side data should be associated with an audio stream and corresponds
+     * to enum AVAudioServiceType.
+     */
+    AV_PKT_DATA_AUDIO_SERVICE_TYPE,
 };
 
 typedef struct AVPacketSideData {

libavcodec/utils.c

@@ -569,6 +569,7 @@ int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
         { AV_PKT_DATA_REPLAYGAIN ,   AV_FRAME_DATA_REPLAYGAIN },
         { AV_PKT_DATA_DISPLAYMATRIX, AV_FRAME_DATA_DISPLAYMATRIX },
         { AV_PKT_DATA_STEREO3D,      AV_FRAME_DATA_STEREO3D },
+        { AV_PKT_DATA_AUDIO_SERVICE_TYPE, AV_FRAME_DATA_AUDIO_SERVICE_TYPE },
     };
 
     frame->color_primaries = avctx->color_primaries;

libavcodec/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR 11
+#define LIBAVCODEC_VERSION_MINOR 12
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \