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rtpssrcdemux: Hold on internal stream lock while pushing sticky

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This reverts "6f3734c305 rtpssrcdemux: Only forward stick events while
holding the sinkpad stream lock" and actually hold on the internal
stream lock. This prevents in some needed case having a second
streaming thread poping in and messing up event ordering.
This commit is contained in:
Nicolas Dufresne 2018-11-28 17:14:11 -05:00
parent c596bdda38
commit 40daf6322d
1 changed files with 6 additions and 39 deletions
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45
gst/rtpmanager/gstrtpssrcdemux.c
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@ -142,9 +142,6 @@ struct _GstRtpSsrcDemuxPad
GstPad *rtp_pad;
GstCaps *caps;
GstPad *rtcp_pad;
gboolean pushed_initial_rtp_events;
gboolean pushed_initial_rtcp_events;
};
/* find a src pad for a given SSRC, returns NULL if the SSRC was not found
@ -197,6 +194,7 @@ struct ForwardStickyEventData
guint32 ssrc;
};
/* With internal stream lock held */
static gboolean
forward_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
{
@ -210,6 +208,7 @@ forward_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
return TRUE;
}
/* With internal stream lock held */
static void
forward_initial_events (GstRtpSsrcDemux * demux, guint32 ssrc, GstPad * pad,
PadType padtype)
@ -240,28 +239,17 @@ find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
gchar *padname;
GstRtpSsrcDemuxPad *demuxpad;
GstPad *retpad;
gulong rtp_block, rtcp_block;
GST_PAD_LOCK (demux);
demuxpad = find_demux_pad_for_ssrc (demux, ssrc);
if (demuxpad != NULL) {
gboolean forward = FALSE;
switch (padtype) {
case RTP_PAD:
retpad = gst_object_ref (demuxpad->rtp_pad);
if (!demuxpad->pushed_initial_rtp_events) {
forward = TRUE;
demuxpad->pushed_initial_rtp_events = TRUE;
}
break;
case RTCP_PAD:
retpad = gst_object_ref (demuxpad->rtcp_pad);
if (!demuxpad->pushed_initial_rtcp_events) {
forward = TRUE;
demuxpad->pushed_initial_rtcp_events = TRUE;
}
break;
default:
retpad = NULL;
@ -270,8 +258,6 @@ find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
GST_PAD_UNLOCK (demux);
if (forward)
forward_initial_events (demux, ssrc, retpad, padtype);
return retpad;
}
@ -312,15 +298,8 @@ find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
gst_pad_use_fixed_caps (rtcp_pad);
gst_pad_set_active (rtcp_pad, TRUE);
if (padtype == RTP_PAD) {
demuxpad->pushed_initial_rtp_events = TRUE;
forward_initial_events (demux, ssrc, rtp_pad, padtype);
} else if (padtype == RTCP_PAD) {
demuxpad->pushed_initial_rtcp_events = TRUE;
forward_initial_events (demux, ssrc, rtcp_pad, padtype);
} else {
g_assert_not_reached ();
}
forward_initial_events (demux, ssrc, rtp_pad, RTP_PAD);
forward_initial_events (demux, ssrc, rtcp_pad, RTCP_PAD);
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtp_pad);
gst_element_add_pad (GST_ELEMENT_CAST (demux), rtcp_pad);
@ -340,18 +319,10 @@ find_or_create_demux_pad_for_ssrc (GstRtpSsrcDemux * demux, guint32 ssrc,
gst_object_ref (rtp_pad);
gst_object_ref (rtcp_pad);
rtp_block = gst_pad_add_probe (rtp_pad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM,
NULL, NULL, NULL);
rtcp_block = gst_pad_add_probe (rtcp_pad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM,
NULL, NULL, NULL);
GST_PAD_UNLOCK (demux);
g_signal_emit (G_OBJECT (demux),
gst_rtp_ssrc_demux_signals[SIGNAL_NEW_SSRC_PAD], 0, ssrc, rtp_pad);
gst_pad_remove_probe (rtp_pad, rtp_block);
gst_pad_remove_probe (rtcp_pad, rtcp_block);
GST_PAD_UNLOCK (demux);
gst_object_unref (rtp_pad);
gst_object_unref (rtcp_pad);
@ -565,11 +536,7 @@ forward_event (GstPad * pad, gpointer user_data)
for (walk = fdata->demux->srcpads; walk; walk = walk->next) {
GstRtpSsrcDemuxPad *dpad = (GstRtpSsrcDemuxPad *) walk->data;
/* Only forward the event if the initial events have been through first,
* the initial events should be forwarded before any other event
* or buffer is pushed */
if ((pad == dpad->rtp_pad && dpad->pushed_initial_rtp_events) ||
(pad == dpad->rtcp_pad && dpad->pushed_initial_rtcp_events)) {
if (pad == dpad->rtp_pad || pad == dpad->rtcp_pad) {
newevent = add_ssrc_and_ref (fdata->event, dpad->ssrc);
break;
}