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demux_lavf: fix mp_seek behavior in case of seeking error

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When trying to seek past the end of file, the ByteIOContext expect
that the stream is left in the same state as it was before the
tentative seek. stream_seek() does not meet this expectation.
It changes current position when seeking past the end of file.
Thus, it is necessary to reset the stream to its previous state
after a seek failure.


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27459 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
aurel 2008-08-13 00:01:31 +00:00
parent f88bf0c7b7
commit 03e568867e
1 changed files with 6 additions and 1 deletions
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7
libmpdemux/demux_lavf.c
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@ -97,6 +97,7 @@ static int mp_read(void *opaque, uint8_t *buf, int size) {
static offset_t mp_seek(void *opaque, offset_t pos, int whence) {
stream_t *stream = opaque;
offset_t current_pos;
mp_msg(MSGT_HEADER,MSGL_DBG2,"mp_seek(%p, %d, %d)\n", stream, (int)pos, whence);
if(whence == SEEK_CUR)
pos +=stream_tell(stream);
@ -113,8 +114,12 @@ static offset_t mp_seek(void *opaque, offset_t pos, int whence) {
return -1;
if(pos<stream->end_pos && stream->eof)
stream_reset(stream);
if(stream_seek(stream, pos)==0)
current_pos = stream_tell(stream);
if(stream_seek(stream, pos)==0) {
stream_reset(stream);
stream_seek(stream, current_pos);
return -1;
}
return pos - stream->start_pos;
}