1 From 6914566ed6a89c96973a578aa5ecd01ee68cdcfd Mon Sep 17 00:00:00 2001
2 From: Jian <Jian.Li@freescale.com>
3 Date: Thu, 14 May 2015 15:49:43 +0800
4 Subject: [PATCH] basesink: Fix QoS/lateness checking if subclass implements
5 prepare/prepare_list vfuncs
7 Content-Type: text/plain; charset=UTF-8
8 Content-Transfer-Encoding: 8bit
10 In basesink functions gst_base_sink_chain_unlocked(), below code is used to
11 checking if buffer is late before doing prepare call to save some effort:
12 if (syncable && do_sync)
14 gst_base_sink_is_too_late (basesink, obj, rstart, rstop,
15 GST_CLOCK_EARLY, 0, FALSE);
17 if (G_UNLIKELY (late))
20 But this code has problem, it should calculate jitter based on current media
21 clock, rather than just passing 0. I found it will drop all the frames when
22 rewind in slow speed, such as -2X.
24 https://bugzilla.gnome.org/show_bug.cgi?id=749258
26 Upstream-Status:Â Backport [1.5.1]
28 libs/gst/base/gstbasesink.c | 26 ++++++++++++++++++++++----
29 1 file changed, 22 insertions(+), 4 deletions(-)
31 diff --git a/libs/gst/base/gstbasesink.c b/libs/gst/base/gstbasesink.c
32 index a505695..5fb2d6a 100644
33 --- a/libs/gst/base/gstbasesink.c
34 +++ b/libs/gst/base/gstbasesink.c
35 @@ -3369,10 +3369,28 @@ gst_base_sink_chain_unlocked (GstBaseSink * basesink, GstPad * pad,
36 if (G_UNLIKELY (stepped))
39 - if (syncable && do_sync)
41 - gst_base_sink_is_too_late (basesink, obj, rstart, rstop,
42 - GST_CLOCK_EARLY, 0, FALSE);
43 + if (syncable && do_sync) {
46 + GST_OBJECT_LOCK (basesink);
47 + clock = GST_ELEMENT_CLOCK (basesink);
48 + if (clock && GST_STATE (basesink) == GST_STATE_PLAYING) {
49 + GstClockTime base_time;
53 + base_time = GST_ELEMENT_CAST (basesink)->base_time;
54 + stime = base_time + gst_base_sink_adjust_time (basesink, rstart);
55 + now = gst_clock_get_time (clock);
56 + GST_OBJECT_UNLOCK (basesink);
59 + gst_base_sink_is_too_late (basesink, obj, rstart, rstop,
60 + GST_CLOCK_EARLY, GST_CLOCK_DIFF (stime, now), FALSE);
62 + GST_OBJECT_UNLOCK (basesink);
66 if (G_UNLIKELY (late))