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| author | Michael Niedermayer <michaelni@gmx.at> | 2006-11-08 18:15:54 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2006-11-08 18:15:54 +0000 |
| commit | b5ca0c6ff9add05363088bd1944705c8d6b5c4a8 (patch) | |
| tree | f23c275000cf67102405c3cb9da17036c866b219 /libavcodec/h263.c | |
| parent | 171b361e0122499df7faa3f5ed046ab8a19cceb4 (diff) | |
| download | ffmpeg-b5ca0c6ff9add05363088bd1944705c8d6b5c4a8.tar.gz | |
100l for me, iam being to stupid to read the mpeg4 spec / eat stuffing mbs a the end of the picture
Originally committed as revision 6942 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/h263.c')
| -rw-r--r-- | libavcodec/h263.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/libavcodec/h263.c b/libavcodec/h263.c index 6a934b5397..d86ee8f81d 100644 --- a/libavcodec/h263.c +++ b/libavcodec/h263.c @@ -3188,20 +3188,29 @@ void ff_mpeg4_encode_video_packet_header(MpegEncContext *s) * @return 0 if not */ static inline int mpeg4_is_resync(MpegEncContext *s){ - const int bits_count= get_bits_count(&s->gb); + int bits_count= get_bits_count(&s->gb); + int v= show_bits(&s->gb, 16); if(s->workaround_bugs&FF_BUG_NO_PADDING){ return 0; } + while(v<=0xFF){ + if(s->pict_type==B_TYPE || (v>>(8-s->pict_type)!=1)) + break; + skip_bits(&s->gb, 8+s->pict_type); + bits_count+= 8+s->pict_type; + v= show_bits(&s->gb, 16); + } + if(bits_count + 8 >= s->gb.size_in_bits){ - int v= show_bits(&s->gb, 8); + v>>=8; v|= 0x7F >> (7-(bits_count&7)); if(v==0x7F) return 1; }else{ - if(show_bits(&s->gb, 16) == ff_mpeg4_resync_prefix[bits_count&7]){ + if(v == ff_mpeg4_resync_prefix[bits_count&7]){ int len; GetBitContext gb= s->gb; @@ -4520,12 +4529,6 @@ end: /* per-MB end of slice check */ if(s->codec_id==CODEC_ID_MPEG4){ -#if 0 //http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_IEC_14496-4_2004_Conformance_Testing/video_conformance/version_1/simple/ERROR.ZIP/mit025.m4v needs this but its unclear if the mpeg4 standard allows this at all (MN) - if(s->pict_type != B_TYPE){ - while(show_bits(&s->gb, 9 + (s->pict_type == P_TYPE)) == 1) - skip_bits(&s->gb, 9 + (s->pict_type == P_TYPE)); - } -#endif if(mpeg4_is_resync(s)){ const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; if(s->pict_type==B_TYPE && s->next_picture.mbskip_table[xy + delta]) |