Module: libav
Branch: master
Commit: 0999151962f60abee1989d863dba6c09573b7a6b

Author:    Tomas Härdin <[email protected]>
Committer: Janne Grunau <[email protected]>
Date:      Mon Nov 28 10:51:00 2011 +0100

mxfdec: Make sure DataDefinition is consistent between material track and 
source track.

This fixes 0001GL.MXF.V1.mxf_opatom.mxf and 0001GL00.MXF.A1.mxf_opatom.mxf
getting two streams each due to both using the same SourcePackageID.

Signed-off-by: Janne Grunau <[email protected]>

---

 libavformat/mxfdec.c |   17 ++++++++++++-----
 1 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 6f4824a..7c45b01 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1153,6 +1153,18 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
         if (!source_track)
             continue;
 
+        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, 
&source_track->sequence_ref, Sequence))) {
+            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track 
sequence strong ref\n");
+            return AVERROR_INVALIDDATA;
+        }
+
+        /* 0001GL00.MXF.A1.mxf_opatom.mxf has the same SourcePackageID as 
0001GL.MXF.V1.mxf_opatom.mxf
+         * This would result in both files appearing to have two streams. Work 
around this by sanity checking DataDefinition */
+        if (memcmp(material_track->sequence->data_definition_ul, 
source_track->sequence->data_definition_ul, 16)) {
+            av_log(mxf->fc, AV_LOG_ERROR, "material track %d: DataDefinition 
mismatch\n", material_track->track_id);
+            continue;
+        }
+
         st = avformat_new_stream(mxf->fc, NULL);
         if (!st) {
             av_log(mxf->fc, AV_LOG_ERROR, "could not allocate stream\n");
@@ -1166,11 +1178,6 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
         st->start_time = component->start_position;
         avpriv_set_pts_info(st, 64, material_track->edit_rate.num, 
material_track->edit_rate.den);
 
-        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, 
&source_track->sequence_ref, Sequence))) {
-            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track 
sequence strong ref\n");
-            return AVERROR_INVALIDDATA;
-        }
-
         PRINT_KEY(mxf->fc, "data definition   ul", 
source_track->sequence->data_definition_ul);
         codec_ul = mxf_get_codec_ul(ff_mxf_data_definition_uls, 
&source_track->sequence->data_definition_ul);
         st->codec->codec_type = codec_ul->id;

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