libavformat/mxfdec: read source timecode from pulldown component

Reviewed-by: Tomas Härdin <tomas.hardin@codemill.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/mxf.h

@@ -33,6 +33,7 @@ enum MXFMetadataSetType {
     SourcePackage,
     SourceClip,
     TimecodeComponent,
+    PulldownComponent,
     Sequence,
     MultipleDescriptor,
     Descriptor,

libavformat/mxfdec.c

@@ -126,6 +126,12 @@ typedef struct {
     AVTimecode tc;
 } MXFTimecodeComponent;
 
+typedef struct {
+    UID uid;
+    enum MXFMetadataSetType type;
+    UID input_segment_ref;
+} MXFPulldownComponent;
+
 typedef struct {
     UID uid;
     enum MXFMetadataSetType type;
@@ -693,6 +699,17 @@ static int mxf_read_timecode_component(void *arg, AVIOContext *pb, int tag, int
     return 0;
 }
 
+static int mxf_read_pulldown_component(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
+{
+    MXFPulldownComponent *mxf_pulldown = arg;
+    switch(tag) {
+    case 0x0d01:
+        avio_read(pb, mxf_pulldown->input_segment_ref, 16);
+        break;
+    }
+    return 0;
+}
+
 static int mxf_read_track(void *arg, AVIOContext *pb, int tag, int size, UID uid, int64_t klv_offset)
 {
     MXFTrack *track = arg;
@@ -1413,6 +1430,7 @@ static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_t
     MXFStructuralComponent *component = NULL;
     MXFStructuralComponent *sourceclip = NULL;
     MXFTimecodeComponent *mxf_tc = NULL;
+    MXFPulldownComponent *mxf_pulldown = NULL;
     int i, j, k;
     AVTimecode tc;
     int flags;
@@ -1456,8 +1474,16 @@ static int mxf_parse_physical_source_package(MXFContext *mxf, MXFTrack *source_t
 
             for (k = 0; k < physical_track->sequence->structural_components_count; k++) {
                 component = mxf_resolve_strong_ref(mxf, &physical_track->sequence->structural_components_refs[k], TimecodeComponent);
-                if (!component)
-                    continue;
+                if (!component){
+                    /* timcode component may be located on a pulldown component */
+                    component = mxf_resolve_strong_ref(mxf, &physical_track->sequence->structural_components_refs[k], PulldownComponent);
+                    if (!component)
+                        continue;
+                    mxf_pulldown = (MXFPulldownComponent*)component;
+                    component = mxf_resolve_strong_ref(mxf, &mxf_pulldown->input_segment_ref, TimecodeComponent);
+                    if (!component)
+                        continue;
+                }
 
                 mxf_tc = (MXFTimecodeComponent*)component;
                 flags = mxf_tc->drop_frame == 1 ? AV_TIMECODE_FLAG_DROPFRAME : 0;
@@ -1944,6 +1970,7 @@ static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
     { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Static Track */
     { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_track, sizeof(MXFTrack), Track }, /* Generic Track */
     { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x14,0x00 }, mxf_read_timecode_component, sizeof(MXFTimecodeComponent), TimecodeComponent },
+    { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0c,0x00 }, mxf_read_pulldown_component, sizeof(MXFPulldownComponent), PulldownComponent },
     { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
     { { 0x06,0x0e,0x2b,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x10,0x01,0x00 }, mxf_read_index_table_segment, sizeof(MXFIndexTableSegment), IndexTableSegment },
     { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },

tests/ref/lavf/mxf

-103403355e6dec356c7342ee2d034691 *./tests/data/lavf/lavf.mxf
+dbc4ced82ef1c2fa4df3571b4f994a22 *./tests/data/lavf/lavf.mxf
 525369 ./tests/data/lavf/lavf.mxf
 ./tests/data/lavf/lavf.mxf CRC=0xdbfff6f1
-f61e4c8481610f30b2f5e2279e254f6b *./tests/data/lavf/lavf.mxf
+fe4294023cd990938f042c7855405f63 *./tests/data/lavf/lavf.mxf
 560697 ./tests/data/lavf/lavf.mxf
 ./tests/data/lavf/lavf.mxf CRC=0x11a6178e
-a586dad4ff94136be460afb02ff6101e *./tests/data/lavf/lavf.mxf
+ef0c741e17bf7963fc51adcb6bab8ec8 *./tests/data/lavf/lavf.mxf
 525369 ./tests/data/lavf/lavf.mxf
 ./tests/data/lavf/lavf.mxf CRC=0xdbfff6f1

tests/ref/lavf/mxf_d10

-838b732d832dcf40b0eb9944bc6d8f55 *./tests/data/lavf/lavf.mxf_d10
+87e0903ef7ea55b1a032b9d878588683 *./tests/data/lavf/lavf.mxf_d10
 5330989 ./tests/data/lavf/lavf.mxf_d10
 ./tests/data/lavf/lavf.mxf_d10 CRC=0x6c74d488