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dv probe

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Originally committed as revision 17607 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2009-02-26 08:45:59 +00:00
parent 2578326f13
commit e34a5996b9
1 changed files with 19 additions and 1 deletions
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20
libavformat/dv.c
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@ -474,12 +474,30 @@ static int dv_read_close(AVFormatContext *s)
return 0;
}
static int dv_probe(AVProbeData *p)
{
unsigned state;
int i;
if (p->buf_size < 5)
return 0;
state = AV_RB32(p->buf);
for (i = 4; i < p->buf_size; i++) {
if ((state & 0xffffff7f) == 0x1f07003f)
return AVPROBE_SCORE_MAX*3/4; // not max to avoid dv in mov to match
state = (state << 8) | p->buf[i];
}
return 0;
}
#if CONFIG_DV_DEMUXER
AVInputFormat dv_demuxer = {
"dv",
NULL_IF_CONFIG_SMALL("DV video format"),
sizeof(RawDVContext),
NULL,
dv_probe,
dv_read_header,
dv_read_packet,
dv_read_close,