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avformat/mp3dec: optimize mp3_seek() for dir < 0

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this minimizes the amount of protocol seeks and reading needed in that case

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-02 00:18:25 +01:00
parent 9600486d10
commit 171dd67520
1 changed files with 2 additions and 0 deletions
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2
libavformat/mp3dec.c
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@ -318,6 +318,8 @@ static int mp3_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
return -1;
}
if (dir < 0)
avio_seek(s->pb, FFMAX(ie->pos - 4096, 0), SEEK_SET);
ret = avio_seek(s->pb, ie->pos, SEEK_SET);
if (ret < 0)
return ret;