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fetch display aspect ratio from mpeg-2 essence

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Originally committed as revision 17371 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-02-16 12:48:45 +00:00
parent 3842560379
commit e86a14ded9
1 changed files with 13 additions and 8 deletions
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21
libavformat/mxfenc.c
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@ -68,6 +68,7 @@ typedef struct {
int order; ///< interleaving order if dts are equal
int interlaced; ///< wether picture is interlaced
int temporal_reordering;
AVRational aspect_ratio; ///< display aspect ratio
} MXFStreamContext;
typedef struct {
@ -778,7 +779,6 @@ static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID ke
ByteIOContext *pb = s->pb;
int stored_height = (st->codec->height+15)/16*16;
int display_height;
AVRational dar;
int f1, f2;
mxf_write_generic_desc(s, st, key, size);
@ -837,14 +837,9 @@ static void mxf_write_cdci_common(AVFormatContext *s, AVStream *st, const UID ke
if (sc->interlaced)
put_be32(pb, f2);
av_reduce(&dar.num, &dar.den,
st->codec->width*st->codec->sample_aspect_ratio.num,
st->codec->height*st->codec->sample_aspect_ratio.den,
1024*1024);
mxf_write_local_tag(pb, 8, 0x320E);
put_be32(pb, dar.num);
put_be32(pb, dar.den);
put_be32(pb, sc->aspect_ratio.num);
put_be32(pb, sc->aspect_ratio.den);
mxf_write_local_tag(pb, 16, 0x3201);
put_buffer(pb, *sc->codec_ul, 16);
@ -1349,6 +1344,16 @@ static int mxf_parse_mpeg2_frame(AVFormatContext *s, AVStream *st, AVPacket *pkt
}
} else if (c == 0x1b3) { // seq
*flags |= 0x40;
if (i + 4 < pkt->size) {
switch ((pkt->data[i+4]>>4) & 0xf) {
case 2: sc->aspect_ratio = (AVRational){ 4, 3}; break;
case 3: sc->aspect_ratio = (AVRational){ 16, 9}; break;
case 4: sc->aspect_ratio = (AVRational){221,100}; break;
default:
av_reduce(&sc->aspect_ratio.num, &sc->aspect_ratio.den,
st->codec->width, st->codec->height, 1024*1024);
}
}
} else if (c == 0x100) { // pic
int pict_type = (pkt->data[i+2]>>3) & 0x07;
if (pict_type == 2) { // P frame