videolan/ffmpeg
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slice structured fixes

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Originally committed as revision 2581 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-12-09 13:47:08 +00:00
parent 5ea4b18d9f
commit 0ed714a702
1 changed files with 29 additions and 3 deletions
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32
libavcodec/h263.c
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@ -288,6 +288,15 @@ void h263_encode_picture_header(MpegEncContext * s, int picture_number)
put_bits(&s->pb, 1, 0); /* no PEI */
if(s->h263_slice_structured){
put_bits(&s->pb, 1, 1);
assert(s->mb_x == 0 && s->mb_y == 0);
ff_h263_encode_mba(s);
put_bits(&s->pb, 1, 1);
}
if(s->h263_aic){
s->y_dc_scale_table=
s->c_dc_scale_table= ff_aic_dc_scale_table;
@ -2814,7 +2823,7 @@ int ff_h263_decode_mba(MpegEncContext *s)
int i, mb_pos;
for(i=0; i<6; i++){
if(s->mb_num < ff_mba_max[i]) break;
if(s->mb_num-1 <= ff_mba_max[i]) break;
}
mb_pos= get_bits(&s->gb, ff_mba_length[i]);
s->mb_x= mb_pos % s->mb_width;
@ -2828,7 +2837,7 @@ void ff_h263_encode_mba(MpegEncContext *s)
int i, mb_pos;
for(i=0; i<6; i++){
if(s->mb_num < ff_mba_max[i]) break;
if(s->mb_num-1 <= ff_mba_max[i]) break;
}
mb_pos= s->mb_x + s->mb_width*s->mb_y;
put_bits(&s->pb, ff_mba_length[i], mb_pos);
@ -3135,6 +3144,7 @@ int ff_h263_resync(MpegEncContext *s){
align_get_bits(&s->gb);
}
//printf("checking next 16 %X\n", show_bits(&s->gb, 24));
if(show_bits(&s->gb, 16)==0){
if(s->codec_id==CODEC_ID_MPEG4)
ret= mpeg4_decode_video_packet_header(s);
@ -3146,6 +3156,7 @@ int ff_h263_resync(MpegEncContext *s){
//ok, its not where its supposed to be ...
s->gb= s->last_resync_gb;
align_get_bits(&s->gb);
printf("align %X\n", show_bits(&s->gb, 24));
left= s->gb.size_in_bits - get_bits_count(&s->gb);
for(;left>16+1+5+5; left-=8){
@ -3163,7 +3174,7 @@ int ff_h263_resync(MpegEncContext *s){
}
skip_bits(&s->gb, 8);
}
printf("no resync\n");
return -1;
}
@ -4962,10 +4973,25 @@ int h263_decode_picture_header(MpegEncContext *s)
s->qscale = get_bits(&s->gb, 5);
}
/* PEI */
while (get_bits1(&s->gb) != 0) {
skip_bits(&s->gb, 8);
}
if(s->h263_slice_structured){
if (get_bits1(&s->gb) != 1) {
av_log(s->avctx, AV_LOG_ERROR, "SEPB1 marker missing\n");
return -1;
}
ff_h263_decode_mba(s);
if (get_bits1(&s->gb) != 1) {
av_log(s->avctx, AV_LOG_ERROR, "SEPB2 marker missing\n");
return -1;
}
}
s->f_code = 1;
if(s->h263_aic){