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Code Issues Releases Activity

mpegvideo_probe: check slice order

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Fixes: Enrique.mp3

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-01 15:00:20 +01:00
parent 7fd9d49ba7
commit e5cf100d3d
1 changed files with 13 additions and 3 deletions
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16
libavformat/mpegvideodec.c
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@ -34,8 +34,9 @@
static int mpegvideo_probe(AVProbeData *p)
{
uint32_t code= -1;
int pic=0, seq=0, slice=0, pspack=0, vpes=0, apes=0, res=0;
int pic=0, seq=0, slice=0, pspack=0, vpes=0, apes=0, res=0, sicle=0;
int i;
uint32_t last = 0;
for(i=0; i<p->buf_size; i++){
code = (code<<8) + p->buf[i];
@ -47,12 +48,21 @@ static int mpegvideo_probe(AVProbeData *p)
case 0x1b6:
res++; break;
}
if (code >= SLICE_START_CODE && code <= 0x1af) slice++;
if (code >= SLICE_START_CODE && code <= 0x1af) {
if (last >= SLICE_START_CODE && last <= 0x1af) {
if (code >= last) slice++;
else sicle++;
}else{
if (code == SLICE_START_CODE) slice++;
else sicle++;
}
}
if ((code & 0x1f0) == VIDEO_ID) vpes++;
else if((code & 0x1e0) == AUDIO_ID) apes++;
last = code;
}
}
if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !apes && !res) {
if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !apes && !res && slice > sicle) {
if(vpes) return AVPROBE_SCORE_MAX/8;
else return pic>1 ? AVPROBE_SCORE_MAX/2+1 : AVPROBE_SCORE_MAX/4; // +1 for .mpg
}