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Implement librtmp seek support.

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Implement flv_read_seek(), add a missing check on stream_index
and fix timestamp rounding in rtmp_read_seek().

Also add the flv_read_seek2() function, which is not enabled but is
useful as reference.
To actually implement flv_read_seek2() correctly, there would need to
be some corresponding av_url_read_fseek2() function to propagate the
timestamps down to the ByteIOContext and URLContext.

Patch by Howard Chu <hyc <at> highlandsun.com>.

See the thread:
Subject: [FFmpeg-devel] RTMP seek support
Date: 2010-03-28 23:35:02 GMT

Originally committed as revision 22904 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Howard Chu
2010-04-18 19:09:25 +00:00
committed by Stefano Sabatini
parent d79fc8403b
commit fc8fa007fb
2 changed files with 41 additions and 1 deletions
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5
libavformat/librtmp.c
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@ -144,7 +144,10 @@ static int64_t rtmp_read_seek(URLContext *s, int stream_index,
return AVERROR(ENOSYS);
/* seeks are in milliseconds */
timestamp = av_rescale(timestamp, AV_TIME_BASE, 1000);
if (stream_index < 0)
timestamp = av_rescale_rnd(timestamp, 1000, AV_TIME_BASE,
flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP);
if (!RTMP_SendSeek(r, timestamp))
return -1;
return timestamp;