[FFmpeg-devel] [PATCH] mxfdec: Split essence container ul again by audio/video.

[Reimar Döffinger]

This fixes issue 721 where MP2 audio is detected and MPEG-2
video, because only 14 bytes of the UL are compared and those
are identical for both.
In addition this is simply more robust: since we already check
the codec_type anyway we should not needlessly risk assigning
a codec_id that conflicts with it.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger at gmx.de>
---
 libavformat/mxfdec.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 47717c6..7b32a5a 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -975,10 +975,13 @@ static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMe
     return NULL;
 }
 
-static const MXFCodecUL mxf_essence_container_uls[] = {
+static const MXFCodecUL mxf_video_essence_container_uls[] = {
     // video essence container uls
     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, 14, CODEC_ID_MPEG2VIDEO }, /* MPEG-ES Frame wrapped */
     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x02,0x41,0x01 }, 14,    CODEC_ID_DVVIDEO }, /* DV 625 25mbps */
+};
+
+static const MXFCodecUL mxf_audio_essence_container_uls[] = {
     // sound essence container uls
     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 }, 14, CODEC_ID_PCM_S16LE }, /* BWF Frame wrapped */
     { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 }, 14,       CODEC_ID_MP2 }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
@@ -1329,7 +1332,7 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
             st->codec->extradata_size = descriptor->extradata_size;
         }
         if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
-            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
+            container_ul = mxf_get_codec_ul(mxf_video_essence_container_uls, essence_container_ul);
             if (st->codec->codec_id == CODEC_ID_NONE)
                 st->codec->codec_id = container_ul->id;
             st->codec->width = descriptor->width;
@@ -1338,7 +1341,7 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
                 st->codec->pix_fmt = descriptor->pix_fmt;
             st->need_parsing = AVSTREAM_PARSE_HEADERS;
         } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
-            container_ul = mxf_get_codec_ul(mxf_essence_container_uls, essence_container_ul);
+            container_ul = mxf_get_codec_ul(mxf_audio_essence_container_uls, essence_container_ul);
             if (st->codec->codec_id == CODEC_ID_NONE)
                 st->codec->codec_id = container_ul->id;
             st->codec->channels = descriptor->channels;
-- 
1.7.7.3