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demux_lavf: update growing file size info for AVSEEK_SIZE 

demux_lavf was returning a static size value when libavformat queried
file size with AVSEEK_SIZE. Add code to query the stream for possibly
changed value first. This at least improves seeking with growing MPEG
files; before seeks would never go beyond the part of the file that
existed when the stream was first opened.
This commit is contained in:
Uoti Urpala 2012-02-26 05:53:13 +02:00
parent d0bae74702
commit 9f9bbb3c8b
1 changed files with 5 additions and 2 deletions
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7
libmpdemux/demux_lavf.c
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@ -109,9 +109,12 @@ static int64_t mp_seek(void *opaque, int64_t pos, int whence)
pos += stream->end_pos; pos += stream->end_pos;
else if (whence == SEEK_SET) else if (whence == SEEK_SET)
pos += stream->start_pos; pos += stream->start_pos;
else if (whence == AVSEEK_SIZE && stream->end_pos > 0) else if (whence == AVSEEK_SIZE && stream->end_pos > 0) {
off_t size;
if (stream_control(stream, STREAM_CTRL_GET_SIZE, &size) == STREAM_OK)
return size;
return stream->end_pos - stream->start_pos; return stream->end_pos - stream->start_pos;
else } else
return -1; return -1;
if (pos < 0) if (pos < 0)