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videomixer2: Protect flush_stop_pending with the collectpad stream lock

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And make sure to expect a flush-stop after a flush-start

https://bugzilla.gnome.org/show_bug.cgi?id=684237
This commit is contained in:
Thibault Saunier 2013-05-05 20:24:49 +01:00
parent d1c56376d6
commit 85b6852deb
1 changed files with 26 additions and 4 deletions
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30
gst/videomixer/videomixer2.c
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@ -641,7 +641,9 @@ gst_videomixer2_reset (GstVideoMixer2 * mix)
}
mix->newseg_pending = TRUE;
GST_COLLECT_PADS_STREAM_LOCK (mix->collect);
mix->flush_stop_pending = FALSE;
GST_COLLECT_PADS_STREAM_UNLOCK (mix->collect);
}
/* 1 == OK
@ -957,9 +959,10 @@ gst_videomixer2_collected (GstCollectPads * pads, GstVideoMixer2 * mix)
if (GST_VIDEO_INFO_FORMAT (&mix->info) == GST_VIDEO_FORMAT_UNKNOWN)
return GST_FLOW_NOT_NEGOTIATED;
if (g_atomic_int_compare_and_exchange (&mix->flush_stop_pending, TRUE, FALSE)) {
if (mix->flush_stop_pending == TRUE) {
GST_DEBUG_OBJECT (mix, "pending flush stop");
gst_pad_push_event (mix->srcpad, gst_event_new_flush_stop (TRUE));
mix->flush_stop_pending = FALSE;
}
if (mix->send_stream_start) {
@ -1684,7 +1687,7 @@ gst_videomixer2_sink_event (GstCollectPads * pads, GstCollectData * cdata,
GstEvent * event, GstVideoMixer2 * mix)
{
GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (cdata->pad);
gboolean ret = TRUE;
gboolean ret = TRUE, discard = FALSE;
GST_DEBUG_OBJECT (pad, "Got %s event on pad %s:%s",
GST_EVENT_TYPE_NAME (event), GST_DEBUG_PAD_NAME (pad));
@ -1709,9 +1712,28 @@ gst_videomixer2_sink_event (GstCollectPads * pads, GstCollectData * cdata,
g_assert (seg.format == GST_FORMAT_TIME);
break;
}
case GST_EVENT_FLUSH_START:
GST_COLLECT_PADS_STREAM_LOCK (mix->collect);
mix->flush_stop_pending = TRUE;
ret = gst_collect_pads_event_default (pads, cdata, event, discard);
event = NULL;
GST_COLLECT_PADS_STREAM_UNLOCK (mix->collect);
break;
case GST_EVENT_FLUSH_STOP:
GST_COLLECT_PADS_STREAM_LOCK (mix->collect);
mix->newseg_pending = TRUE;
mix->flush_stop_pending = FALSE;
if (mix->flush_stop_pending) {
GST_DEBUG_OBJECT (pad, "forwarding flush stop");
ret = gst_collect_pads_event_default (pads, cdata, event, discard);
mix->flush_stop_pending = FALSE;
event = NULL;
} else {
discard = TRUE;
GST_DEBUG_OBJECT (pad, "eating flush stop");
}
GST_COLLECT_PADS_STREAM_UNLOCK (mix->collect);
/* FIXME Should we reset in case we were not awaiting a flush stop? */
gst_videomixer2_reset_qos (mix);
gst_buffer_replace (&pad->mixcol->buffer, NULL);
pad->mixcol->start_time = -1;
@ -1727,7 +1749,7 @@ gst_videomixer2_sink_event (GstCollectPads * pads, GstCollectData * cdata,
}
if (event != NULL)
return gst_collect_pads_event_default (pads, cdata, event, FALSE);
return gst_collect_pads_event_default (pads, cdata, event, discard);
return ret;
}