lavc: add sample rate and channel layout to AVFrame.

Rationale is the same as for video width/height etc.

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:     2011-04-18
 
 API changes, most recent first:
 
+2012-xx-xx - xxxxxxx - lavc 54.13.0 - avcodec.h
+  Add sample_rate and channel_layout fields to AVFrame.
+
 2012-xx-xx - xxxxxxx - lavr 0.0.1
   Change AV_MIX_COEFF_TYPE_Q6 to AV_MIX_COEFF_TYPE_Q8.
 

libavcodec/avcodec.h

@@ -1207,6 +1207,22 @@ typedef struct AVFrame {
      * - decoding: Set by libavcodec.
      */
     uint8_t motion_subsample_log2;
+
+    /**
+     * Sample rate of the audio data.
+     *
+     * - encoding: unused
+     * - decoding: set by get_buffer()
+     */
+    int sample_rate;
+
+    /**
+     * Channel layout of the audio data.
+     *
+     * - encoding: unused
+     * - decoding: set by get_buffer()
+     */
+    uint64_t channel_layout;
 } AVFrame;
 
 struct AVCodecInternal;

libavcodec/utils.c

@@ -356,6 +356,10 @@ static int audio_get_buffer(AVCodecContext *avctx, AVFrame *frame)
     else            frame->pkt_pts = AV_NOPTS_VALUE;
     frame->reordered_opaque = avctx->reordered_opaque;
 
+    frame->sample_rate    = avctx->sample_rate;
+    frame->format         = avctx->sample_fmt;
+    frame->channel_layout = avctx->channel_layout;
+
     if (avctx->debug & FF_DEBUG_BUFFERS)
         av_log(avctx, AV_LOG_DEBUG, "default_get_buffer called on frame %p, "
                "internal audio buffer used\n", frame);

libavcodec/version.h

@@ -27,7 +27,7 @@
  */
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 12
+#define LIBAVCODEC_VERSION_MINOR 13
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \