mpegts: demux asynchronous SMPTE 336M Key-Length-Value (KLV) metadata

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/avcodec.h

@@ -469,6 +469,7 @@ enum AVCodecID {
     AV_CODEC_ID_XBIN       = MKBETAG('X','B','I','N'),
     AV_CODEC_ID_IDF        = MKBETAG( 0 ,'I','D','F'),
     AV_CODEC_ID_OTF        = MKBETAG( 0 ,'O','T','F'),
+    AV_CODEC_ID_SMPTE_KLV  = MKBETAG('K','L','V','A'),
 
     AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
 

libavcodec/codec_desc.c

@@ -2446,6 +2446,12 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .long_name = NULL_IF_CONFIG_SMALL("iCEDraw text"),
         .props     = AV_CODEC_PROP_INTRA_ONLY,
     },
+    {
+        .id        = AV_CODEC_ID_SMPTE_KLV,
+        .type      = AVMEDIA_TYPE_SUBTITLE,
+        .name      = "klv",
+        .long_name = NULL_IF_CONFIG_SMALL("SMPTE 336M Key-Length-Value (KLV) metadata"),
+    },
 
 };
 

libavformat/mpegts.c

@@ -581,6 +581,7 @@ static const StreamType REGD_types[] = {
     { MKTAG('D','T','S','1'), AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_DTS },
     { MKTAG('D','T','S','2'), AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_DTS },
     { MKTAG('D','T','S','3'), AVMEDIA_TYPE_AUDIO,   AV_CODEC_ID_DTS },
+    { MKTAG('K','L','V','A'), AVMEDIA_TYPE_DATA,    AV_CODEC_ID_SMPTE_KLV },
     { MKTAG('V','C','-','1'), AVMEDIA_TYPE_VIDEO,   AV_CODEC_ID_VC1 },
     { 0 },
 };