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detect audio-only program streams and broken files made by VDR

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Originally committed as revision 5546 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2006-06-29 19:03:53 +00:00
parent 344a18c3b8
commit 25c533a2c2
1 changed files with 9 additions and 9 deletions
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18
libavformat/mpeg.c
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@ -1269,21 +1269,21 @@ static int mpegps_probe(AVProbeData *p)
for(i=0; i<p->buf_size; i++){
code = (code<<8) + p->buf[i];
if ((code & 0xffffff00) == 0x100) {
switch(code){
case SYSTEM_HEADER_START_CODE: sys++; break;
case PRIVATE_STREAM_1: priv1++; break;
case PACK_START_CODE: pspack++; break;
case (VIDEO_ID + 0x100): vid++; break;
case (AUDIO_ID + 0x100): audio++; break;
}
if(code == SYSTEM_HEADER_START_CODE) sys++;
else if(code == PRIVATE_STREAM_1) priv1++;
else if(code == PACK_START_CODE) pspack++;
else if((code & 0xf0) == VIDEO_ID) vid++;
else if((code & 0xe0) == AUDIO_ID) audio++;
}
}
if(sys && sys*9 <= pspack*10)
return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
if((priv1 || vid) && (priv1+vid)*9 <= pspack*10)
if((priv1 || vid || audio) && (priv1+vid+audio)*9 <= pspack*10)
return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
if((!!vid ^ !!audio) && !sys && !pspack) /* PES stream */
return AVPROBE_SCORE_MAX/2;
return AVPROBE_SCORE_MAX/2+2;
if(vid || audio) /* invalid VDR files */
return AVPROBE_SCORE_MAX/2+2;
return 0;
}