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probe: belive protocol content type if set and avoid lengthly probing. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-12-09 18:42:07 +01:00
parent 76d851b656
commit e3d95b54db
1 changed files with 5 additions and 0 deletions
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5
libavformat/utils.c
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@ -413,6 +413,7 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
{
AVProbeData pd = { filename ? filename : "", NULL, -offset };
unsigned char *buf = NULL;
uint8_t *demuxer_name;
int ret = 0, probe_size, buf_offset = 0;
if (!max_probe_size) {
@ -427,6 +428,10 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
return AVERROR(EINVAL);
}
if (!*fmt && pb && pb->av_class && av_opt_get(pb, "demuxer", AV_OPT_SEARCH_CHILDREN, &demuxer_name) >= 0 && demuxer_name) {
*fmt = av_find_input_format(demuxer_name);
}
for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt;
probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) {
int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0;