Add CODEC_CAP_SUBFRAMES for codecs that output multiple subframes

per AVPacket
No longer print "Multiple frames in a packet" error message
when CODEC_CAP_SUBFRAMES is set (wmapro, wavpack)

Originally committed as revision 19881 to svn://svn.ffmpeg.org/ffmpeg/trunk

ffmpeg.c

@@ -1280,7 +1280,8 @@ static int output_packet(AVInputStream *ist, int ist_index,
     handle_eof:
         ist->pts= ist->next_pts;
 
-        if(avpkt.size && avpkt.size != pkt->size && verbose>0)
+        if(avpkt.size && avpkt.size != pkt->size &&
+           !(ist->st->codec->codec->capabilities & CODEC_CAP_SUBFRAMES) && verbose>0)
             fprintf(stderr, "Multiple frames in a packet from stream %d\n", pkt->stream_index);
 
         /* decode the packet if needed */

libavcodec/avcodec.h

@@ -605,6 +605,10 @@ typedef struct RcOverride{
  * Codec can export data for HW decoding (VDPAU).
  */
 #define CODEC_CAP_HWACCEL_VDPAU    0x0080
+/**
+ * Codec can output multiple frames per AVPacket
+ */
+#define CODEC_CAP_SUBFRAMES        0x0100
 
 //The following defines may change, don't expect compatibility if you use them.
 #define MB_TYPE_INTRA4x4   0x0001

libavcodec/wavpack.c

@@ -964,5 +964,6 @@ AVCodec wavpack_decoder = {
     NULL,
     NULL,
     wavpack_decode_frame,
+    .capabilities = CODEC_CAP_SUBFRAMES,
     .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
 };

libavcodec/wmaprodec.c

@@ -1557,6 +1557,7 @@ AVCodec wmapro_decoder = {
     NULL,
     decode_end,
     decode_packet,
+    .capabilities = CODEC_CAP_SUBFRAMES,
     .flush= flush,
     .long_name = NULL_IF_CONFIG_SMALL("Windows Media Audio 9 Professional"),
 };