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playbin2: delay stream-changed messages

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=637586
This commit is contained in:
Vincent Penquerc'h 2010-12-21 10:26:40 +00:00 committed by Sebastian Dröge
parent 4b3e1403a1
commit f221466099
1 changed files with 73 additions and 3 deletions
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76
gst/playback/gstplaybin2.c
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@ -264,6 +264,8 @@ struct _GstSourceSelect
GstPad *sinkpad; /* the sinkpad of the sink when the selector
* is linked
*/
GstEvent *sinkpad_delayed_event;
gulong sinkpad_data_probe;
};
#define GST_SOURCE_GROUP_GET_LOCK(group) (((GstSourceGroup*)(group))->lock)
@ -1056,6 +1058,8 @@ gst_play_bin_class_init (GstPlayBinClass * klass)
static void
init_group (GstPlayBin * playbin, GstSourceGroup * group)
{
int n;
/* store the array for the different channels */
group->video_channels = g_ptr_array_new ();
group->audio_channels = g_ptr_array_new ();
@ -1089,11 +1093,27 @@ init_group (GstPlayBin * playbin, GstSourceGroup * group)
group->selector[4].media_list[0] = "video/";
group->selector[4].type = GST_PLAY_SINK_TYPE_VIDEO;
group->selector[4].channels = group->video_channels;
for (n = 0; n < GST_PLAY_SINK_TYPE_LAST; n++) {
GstSourceSelect *select = &group->selector[n];
select->sinkpad_delayed_event = NULL;
select->sinkpad_data_probe = 0;
}
}
static void
free_group (GstPlayBin * playbin, GstSourceGroup * group)
{
int n;
for (n = 0; n < GST_PLAY_SINK_TYPE_LAST; n++) {
GstSourceSelect *select = &group->selector[n];
if (select->sinkpad && select->sinkpad_data_probe)
gst_pad_remove_data_probe (select->sinkpad, select->sinkpad_data_probe);
if (select->sinkpad_delayed_event)
gst_event_unref (select->sinkpad_delayed_event);
}
g_free (group->uri);
g_free (group->suburi);
g_ptr_array_free (group->video_channels, TRUE);
@ -2301,6 +2321,39 @@ selector_blocked (GstPad * pad, gboolean blocked, gpointer user_data)
GST_DEBUG_OBJECT (pad, "blocked callback, blocked: %d", blocked);
}
/* this callback sends a delayed event once the pad becomes unblocked */
static gboolean
stream_changed_data_probe (GstPad * pad, GstMiniObject * object, gpointer data)
{
GstSourceSelect *select = (GstSourceSelect *) data;
GstEvent *e;
/* we need do this just once, so cleanup first */
gst_pad_remove_data_probe (pad, select->sinkpad_data_probe);
select->sinkpad_data_probe = 0;
e = select->sinkpad_delayed_event;
select->sinkpad_delayed_event = NULL;
/* really, this should not happen */
if (!e) {
GST_WARNING ("Data probed called, but no delayed event");
return TRUE;
}
if (GST_IS_EVENT (object)
&& GST_EVENT_TYPE (GST_EVENT_CAST (object)) == GST_EVENT_NEWSEGMENT) {
/* push the event first, then send the delayed one */
gst_event_ref (GST_EVENT_CAST (object));
gst_pad_send_event (pad, GST_EVENT_CAST (object));
gst_pad_send_event (pad, e);
return FALSE;
} else {
/* send delayed event, then allow the caller to go on */
gst_pad_send_event (pad, e);
return TRUE;
}
}
/* helper function to lookup stuff in lists */
static gboolean
array_has_value (const gchar * values[], const gchar * value)
@ -2742,8 +2795,25 @@ no_more_pads_cb (GstElement * decodebin, GstSourceGroup * group)
group->stream_changed_pending =
g_list_prepend (group->stream_changed_pending,
GUINT_TO_POINTER (seqnum));
/* remove any data probe we might have, and replace */
if (select->sinkpad_delayed_event)
gst_event_unref (select->sinkpad_delayed_event);
select->sinkpad_delayed_event = event;
if (select->sinkpad_data_probe)
gst_pad_remove_data_probe (select->sinkpad,
select->sinkpad_data_probe);
/* we go to the trouble of setting a probe on the pad to send
the playbin2-stream-changed event as sending it here might
find that the pad is blocked, so we'd block here, and the
pad might not be linked yet. Additionally, sending it here
apparently would be on the wrong thread */
select->sinkpad_data_probe =
gst_pad_add_data_probe (select->sinkpad,
(GCallback) stream_changed_data_probe, (gpointer) select);
g_mutex_unlock (group->stream_changed_pending_lock);
gst_pad_send_event (select->sinkpad, event);
gst_message_unref (msg);
}
@ -2870,8 +2940,8 @@ autoplug_continue_cb (GstElement * element, GstPad * pad, GstCaps * caps,
GstPad *text_sinkpad = NULL;
text_sink =
(group->playbin->text_sink) ? gst_object_ref (group->playbin->
text_sink) : NULL;
(group->playbin->text_sink) ? gst_object_ref (group->
playbin->text_sink) : NULL;
if (text_sink)
text_sinkpad = gst_element_get_static_pad (text_sink, "sink");