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Check for reference frames so RV 3/4 won't segfault trying to copy data from 

nonexisting reference.

Originally committed as revision 22378 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2010-03-09 07:14:34 +00:00
parent d63a718764
commit 95bd18eeca
1 changed files with 4 additions and 0 deletions
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4
libavcodec/rv34.c
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@ -1452,8 +1452,12 @@ int ff_rv34_decode_frame(AVCodecContext *avctx,
av_log(avctx, AV_LOG_ERROR, "First slice header is incorrect\n");
return -1;
}
if((!s->last_picture_ptr || !s->last_picture_ptr->data[0]) && si.type == FF_P_TYPE)
return -1;
if((!s->last_picture_ptr || !s->last_picture_ptr->data[0]) && si.type == FF_B_TYPE)
return -1;
if((!s->next_picture_ptr || !s->next_picture_ptr->data[0]) && si.type == FF_B_TYPE)
return -1;
/* skip b frames if we are in a hurry */
if(avctx->hurry_up && si.type==FF_B_TYPE) return buf_size;
if( (avctx->skip_frame >= AVDISCARD_NONREF && si.type==FF_B_TYPE)