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mxf: Read field dominance flag 

And export the information in field_order.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Matthieu Bouron 2013-02-16 13:52:29 +01:00 committed by Luca Barbato
parent 7d56f2fffc
commit c716624853
1 changed files with 19 additions and 0 deletions
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19
libavformat/mxfdec.c
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@ -134,6 +134,9 @@ typedef struct {
int width;
int height; /* Field height, not frame height */
int frame_layout; /* See MXFFrameLayout enum */
#define MXF_TFF 1
#define MXF_BFF 2
int field_dominance;
int channels;
int bits_per_sample;
unsigned int component_depth;
@ -830,6 +833,9 @@ static int mxf_read_generic_descriptor(void *arg, AVIOContext *pb, int tag, int
descriptor->aspect_ratio.num = avio_rb32(pb);
descriptor->aspect_ratio.den = avio_rb32(pb);
break;
case 0x3212:
descriptor->field_dominance = avio_r8(pb);
break;
case 0x3301:
descriptor->component_depth = avio_rb32(pb);
break;
@ -1507,6 +1513,19 @@ static int mxf_parse_structural_metadata(MXFContext *mxf)
* It's also for compatibility with the old behavior. */
case SeparateFields:
case MixedFields:
switch (descriptor->field_dominance) {
case MXF_TFF:
st->codec->field_order = AV_FIELD_TT;
break;
case MXF_BFF:
st->codec->field_order = AV_FIELD_BB;
break;
default:
avpriv_request_sample(mxf->fc,
"Field dominance %d support",
descriptor->field_dominance);
break;
}
/* Turn field height into frame height. */
st->codec->height *= 2;
default: