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mpeg12_parser: make mpegvideo_split() more robust

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I just found this issue while debuging, i dont have a testcase.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-10-18 14:08:06 +02:00
parent 4e3303cf31
commit 73fb23dc5a
1 changed files with 4 additions and 1 deletions
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5
libavcodec/mpegvideo_parser.c
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@ -164,10 +164,13 @@ static int mpegvideo_split(AVCodecContext *avctx,
{ {
int i; int i;
uint32_t state= -1; uint32_t state= -1;
int found=0;
for(i=0; i<buf_size; i++){ for(i=0; i<buf_size; i++){
state= (state<<8) | buf[i]; state= (state<<8) | buf[i];
if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100) if(state == 0x1B3){
found=1;
}else if(found && state != 0x1B5 && state < 0x200 && state >= 0x100)
return i-3; return i-3;
} }
return 0; return 0;