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add read_probe function to raw ac3 demuxer

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Originally committed as revision 7887 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2007-02-08 23:41:08 +00:00
parent 74cec57d8e
commit 7156aeb98a
1 changed files with 17 additions and 1 deletions
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18
libavformat/raw.c
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@ -406,6 +406,22 @@ static int h261_probe(AVProbeData *p)
return 0;
}
static int ac3_probe(AVProbeData *p)
{
int score=0;
if(p->buf_size < 6)
return 0;
if((p->buf[0] == 0x0B) && (p->buf[1] == 0x77) && // sync word
((p->buf[4] >> 6) != 3) && // fscod
((p->buf[5] >> 3) <= 16)) { // bsid
score = AVPROBE_SCORE_MAX / 2 + 10;
}
return score;
}
AVInputFormat shorten_demuxer = {
"shn",
"raw shorten",
@ -450,7 +466,7 @@ AVInputFormat ac3_demuxer = {
"ac3",
"raw ac3",
0,
NULL,
ac3_probe,
ac3_read_header,
raw_read_partial_packet,
raw_read_close,