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Code Issues Releases Activity

parsing resync header extension support

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Originally committed as revision 931 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-09-12 15:22:14 +00:00
parent 33cbc6052a
commit f3cfadd52f
1 changed files with 8 additions and 17 deletions
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25
libavcodec/h263.c
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@ -2048,24 +2048,12 @@ static int decode_video_packet_header(MpegEncContext *s, GetBitContext *gb)
if(header_extension){
int time_increment;
int time_incr=0;
printf("header extension not supported\n");
return -1;
while (get_bits1(gb) != 0)
time_incr++;
check_marker(gb, "before time_increment in video packed header");
time_increment= get_bits(gb, s->time_increment_bits);
if(s->pict_type!=B_TYPE){
s->last_time_base= s->time_base;
s->time_base+= time_incr;
s->time= s->time_base*s->time_increment_resolution + time_increment;
s->pp_time= s->time - s->last_non_b_time;
s->last_non_b_time= s->time;
}else{
s->time= (s->last_time_base + time_incr)*s->time_increment_resolution + time_increment;
s->bp_time= s->last_non_b_time - s->time;
}
check_marker(gb, "before vop_coding_type in video packed header");
skip_bits(gb, 2); /* vop coding type */
@ -2076,19 +2064,22 @@ static int decode_video_packet_header(MpegEncContext *s, GetBitContext *gb)
if(s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE && s->num_sprite_warping_points){
mpeg4_decode_sprite_trajectory(s);
fprintf(stderr, "untested\n");
}
//FIXME reduced res stuff here
if (s->pict_type != I_TYPE) {
s->f_code = get_bits(gb, 3); /* fcode_for */
if(s->f_code==0){
printf("Error, video packet header damaged or not MPEG4 header (f_code=0)\n");
return -1; // makes no sense to continue, as the MV decoding will break very quickly
int f_code = get_bits(gb, 3); /* fcode_for */
if(f_code==0){
printf("Error, video packet header damaged (f_code=0)\n");
}
}
if (s->pict_type == B_TYPE) {
s->b_code = get_bits(gb, 3);
int b_code = get_bits(gb, 3);
if(b_code==0){
printf("Error, video packet header damaged (b_code=0)\n");
}
}
}
}