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rv20 (h263) b frame decoding support

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Originally committed as revision 2561 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2003-12-04 18:34:47 +00:00
parent 6952f12338
commit b40cd4e0e4
7 changed files with 321 additions and 63 deletions
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6
libavcodec/mpeg12.c
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@@ -1109,7 +1109,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
}
} else {
if (mb_type & MB_TYPE_ZERO_MV){
assert(mb_type & MB_TYPE_PAT);
assert(mb_type & MB_TYPE_CBP);
/* compute dct type */
if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
@@ -1140,7 +1140,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
/* compute dct type */
if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
!s->frame_pred_frame_dct && IS_PAT(mb_type)) {
!s->frame_pred_frame_dct && HAS_CBP(mb_type)) {
s->interlaced_dct = get_bits1(&s->gb);
}
@@ -1266,7 +1266,7 @@ static int mpeg_decode_mb(MpegEncContext *s,
s->mb_intra = 0;
if (IS_PAT(mb_type)) {
if (HAS_CBP(mb_type)) {
cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
if (cbp < 0){
av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);