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rtpjitterbuffer: Don't use estimated_dts to do default skew adjustment

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When the buffer DTS is estimated based on arrival time at the
jitterbuffer (rather than provided on the incoming buffer itself),
it shouldn't be used for skew adjustment. The typical case is
packets being deinterleaved from a tunnelled TCP/HTTP RTSP stream,
and the arrival times at the jitter buffer are not well enough
correlated to usefully do skew adjustments.

This restores the original intended behaviour for the 'estimated dts'
path, that was broken years ago during other jitterbuffer refactoring.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6509>
This commit is contained in:
Jan Schmidt 2024-04-02 21:30:50 +11:00 committed by GStreamer Marge Bot
parent ee566b8960
commit 832a517965
1 changed files with 3 additions and 1 deletions
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4
subprojects/gst-plugins-good/gst/rtpmanager/rtpjitterbuffer.c
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@ -1082,7 +1082,9 @@ rtp_jitter_buffer_calculate_pts (RTPJitterBuffer * jbuf, GstClockTime dts,
/* do skew calculation by measuring the difference between rtptime and the /* do skew calculation by measuring the difference between rtptime and the
* receive dts, this function will return the skew corrected rtptime. */ * receive dts, this function will return the skew corrected rtptime. */
pts = calculate_skew (jbuf, ext_rtptime, gstrtptime, dts, gap, is_rtx); pts =
calculate_skew (jbuf, ext_rtptime, gstrtptime, estimated_dts ? -1 : dts,
gap, is_rtx);
} }
/* check if timestamps are not going backwards, we can only check this if we /* check if timestamps are not going backwards, we can only check this if we