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xvid qpel bug autodetect 

Originally committed as revision 1064 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-10-22 19:48:52 +00:00
parent 03e93d35b0
commit 7da71a5c68
3 changed files with 22 additions and 3 deletions
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16
libavcodec/h263.c
View File

@ -4328,6 +4328,8 @@ static int decode_user_data(MpegEncContext *s, GetBitContext *gb){
skip_bits(gb, 8);
}
buf[255]=0;
/* divx detection */
e=sscanf(buf, "DivX%dBuild%d", &ver, &build);
if(e!=2)
e=sscanf(buf, "DivX%db%d", &ver, &build);
@ -4336,11 +4338,10 @@ static int decode_user_data(MpegEncContext *s, GetBitContext *gb){
s->divx_build= build;
if(s->picture_number==0){
printf("This file was encoded with DivX%d Build%d\n", ver, build);
if(ver==500 && build==413){
printf("WARNING: this version of DivX is not MPEG4 compatible, trying to workaround these bugs...\n");
}
}
}
/* ffmpeg detection */
e=sscanf(buf, "FFmpeg%d.%d.%db%d", &ver, &ver2, &ver3, &build);
if(e!=4)
e=sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
@ -4356,6 +4357,15 @@ static int decode_user_data(MpegEncContext *s, GetBitContext *gb){
if(s->picture_number==0)
printf("This file was encoded with libavcodec build %d\n", build);
}
/* xvid detection */
e=sscanf(buf, "XviD%d", &build);
if(e==1){
s->xvid_build= build;
if(s->picture_number==0)
printf("This file was encoded with XviD build %d\n", build);
}
//printf("User Data: %s\n", buf);
return 0;
}

7
libavcodec/h263dec.c
View File

@ -376,6 +376,13 @@ uint64_t time= rdtsc();
if(s->divx_version){
s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
}
if(s->avctx->fourcc == ff_get_fourcc("XVID") && s->xvid_build==0)
s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
if(s->xvid_build && s->xvid_build<=1)
s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
//printf("padding_bug_score: %d\n", s->padding_bug_score);
#if 0
if(s->divx_version==500)

2
libavcodec/mpegvideo.h
View File

@ -413,6 +413,8 @@ typedef struct MpegEncContext {
UINT8 *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
int bitstream_buffer_size;
int xvid_build;
/* lavc specific stuff, used to workaround bugs in libavcodec */
int ffmpeg_version;
int lavc_build;