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Make WMV3 decoder print more errors when decoding beta WMV9 files. 

As a side effect it will also decode a lot of P-frames from those.

Originally committed as revision 24161 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2010-07-10 14:36:53 +00:00
parent 42d1e7a287
commit 42ff9d7a58
2 changed files with 4 additions and 7 deletions
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2
libavcodec/vc1.c
View File

@ -388,7 +388,7 @@ int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitConte
// av_log(avctx, AV_LOG_ERROR,
// "0 for reserved RES_RTM_FLAG is forbidden\n");
av_log(avctx, AV_LOG_ERROR,
"Old WMV3 version detected, only I-frames will be decoded\n");
"Old WMV3 version detected, some frames may be decoded incorrectly\n");
//return -1;
}
//TODO: figure out what they mean (always 0x402F)

9
libavcodec/vc1dec.c
View File

@ -1996,7 +1996,9 @@ static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquan
if(ttblk == TT_4X4) {
subblkpat = ~(get_vlc2(gb, ff_vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
}
if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {
if((ttblk != TT_8X8 && ttblk != TT_4X4)
&& ((v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))
|| (!v->res_rtm_flag && !first_block))) {
subblkpat = decode012(gb);
if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits
if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
@ -3212,11 +3214,6 @@ static int vc1_decode_frame(AVCodecContext *avctx,
}
}
if(s->pict_type != FF_I_TYPE && !v->res_rtm_flag){
av_free(buf2);
return -1;
}
// for hurry_up==5
s->current_picture.pict_type= s->pict_type;
s->current_picture.key_frame= s->pict_type == FF_I_TYPE;