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Avoid crash with idiotic cropping. Fixes crash with CVFC1_Sony_C.jsv 

and closes issue333.

Originally committed as revision 12788 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-04-11 12:55:21 +00:00
parent d1300235b9
commit faf3dfb94b
1 changed files with 6 additions and 3 deletions
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9
libavcodec/h264.c
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@ -3941,11 +3941,11 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
h->b_stride= s->mb_width*4;
h->b8_stride= s->mb_width*2;
s->width = 16*s->mb_width - 2*(h->sps.crop_left + h->sps.crop_right );
s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
if(h->sps.frame_mbs_only_flag)
s->height= 16*s->mb_height - 2*(h->sps.crop_top + h->sps.crop_bottom);
s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
else
s->height= 16*s->mb_height - 4*(h->sps.crop_top + h->sps.crop_bottom); //FIXME recheck
s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
if (s->context_initialized
&& ( s->width != s->avctx->width || s->height != s->avctx->height)) {
@ -7244,6 +7244,9 @@ static inline int decode_seq_parameter_set(H264Context *h){
if(sps->crop_left || sps->crop_top){
av_log(h->s.avctx, AV_LOG_ERROR, "insane cropping not completely supported, this could look slightly wrong ...\n");
}
if(sps->crop_right >= 8 || sps->crop_bottom >= (8>> !h->sps.frame_mbs_only_flag)){
av_log(h->s.avctx, AV_LOG_ERROR, "brainfart cropping not supported, this could look slightly wrong ...\n");
}
}else{
sps->crop_left =
sps->crop_right =