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gst/playback/gstplaybin.c: Fix race condition when rapidly switching visualisations in playbin.

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Original commit message from CVS:
Patch by: Ed Catmur <ed at catmur dot co dot uk>
* gst/playback/gstplaybin.c: (gst_play_bin_vis_unblocked),
(gst_play_bin_vis_blocked), (gst_play_bin_set_property):
Fix race condition when rapidly switching visualisations in playbin.
Fixes #401029.
This commit is contained in:
Ed Catmur 2007-02-28 15:17:20 +00:00 committed by Wim Taymans
parent 91e7d53d42
commit 61eaa5eb9b
2 changed files with 44 additions and 29 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2007-02-28 Wim Taymans <wim@fluendo.com>
Patch by: Ed Catmur <ed at catmur dot co dot uk>
* gst/playback/gstplaybin.c: (gst_play_bin_vis_unblocked),
(gst_play_bin_vis_blocked), (gst_play_bin_set_property):
Fix race condition when rapidly switching visualisations in playbin.
Fixes #401029.
2007-02-28 Jan Schmidt <thaytan@mad.scientist.com>
* tests/check/Makefile.am:

64
gst/playback/gstplaybin.c
View file

@ -513,7 +513,11 @@ static void
gst_play_bin_vis_unblocked (GstPad * tee_pad, gboolean blocked,
gpointer user_data)
{
/* Unblocked */
GstPlayBin *play_bin = GST_PLAY_BIN (user_data);
if (play_bin->pending_visualisation)
gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked,
play_bin);
}
static void
@ -524,9 +528,15 @@ gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked,
GstBin *vis_bin = NULL;
GstPad *vis_sink_pad = NULL, *vis_src_pad = NULL, *vqueue_pad = NULL;
GstState bin_state;
GstElement *pending_visualisation;
GST_OBJECT_LOCK (play_bin);
pending_visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
GST_OBJECT_UNLOCK (play_bin);
/* We want to disable visualisation */
if (!GST_IS_ELEMENT (play_bin->pending_visualisation)) {
if (!GST_IS_ELEMENT (pending_visualisation)) {
/* Set visualisation element to READY */
gst_element_set_state (play_bin->visualisation, GST_STATE_READY);
goto beach;
@ -575,17 +585,16 @@ gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked,
/* And loose our ref */
gst_object_unref (play_bin->visualisation);
if (play_bin->pending_visualisation) {
if (pending_visualisation) {
/* Ref this new visualisation element before adding to the bin */
gst_object_ref (play_bin->pending_visualisation);
gst_object_ref (pending_visualisation);
/* Add the new one */
gst_bin_add (vis_bin, play_bin->pending_visualisation);
gst_bin_add (vis_bin, pending_visualisation);
/* Synchronizing state */
gst_element_set_state (play_bin->pending_visualisation, bin_state);
gst_element_set_state (pending_visualisation, bin_state);
vis_sink_pad = gst_element_get_pad (play_bin->pending_visualisation,
"sink");
vis_src_pad = gst_element_get_pad (play_bin->pending_visualisation, "src");
vis_sink_pad = gst_element_get_pad (pending_visualisation, "sink");
vis_src_pad = gst_element_get_pad (pending_visualisation, "src");
if (!GST_IS_PAD (vis_sink_pad) || !GST_IS_PAD (vis_src_pad)) {
goto beach;
@ -598,8 +607,7 @@ gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked,
/* We are done */
gst_object_unref (play_bin->visualisation);
play_bin->visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
play_bin->visualisation = pending_visualisation;
beach:
if (vis_sink_pad) {
@ -656,24 +664,23 @@ gst_play_bin_set_property (GObject * object, guint prop_id,
break;
case ARG_VIS_PLUGIN:
{
GstElement *pending_visualisation =
GST_ELEMENT_CAST (g_value_get_object (value));
/* Take ownership */
if (pending_visualisation) {
gst_object_ref (pending_visualisation);
gst_object_sink (pending_visualisation);
}
/* Do we already have a visualisation change pending ? */
GST_OBJECT_LOCK (play_bin);
if (play_bin->pending_visualisation) {
gst_object_unref (play_bin->pending_visualisation);
play_bin->pending_visualisation = g_value_get_object (value);
/* Take ownership */
if (play_bin->pending_visualisation) {
gst_object_ref (play_bin->pending_visualisation);
gst_object_sink (GST_OBJECT_CAST (play_bin->pending_visualisation));
}
play_bin->pending_visualisation = pending_visualisation;
GST_OBJECT_UNLOCK (play_bin);
} else {
play_bin->pending_visualisation = g_value_get_object (value);
/* Take ownership */
if (play_bin->pending_visualisation) {
gst_object_ref (play_bin->pending_visualisation);
gst_object_sink (GST_OBJECT_CAST (play_bin->pending_visualisation));
}
GST_OBJECT_UNLOCK (play_bin);
/* Was there a visualisation already set ? */
if (play_bin->visualisation != NULL) {
GstBin *vis_bin = NULL;
@ -697,6 +704,7 @@ gst_play_bin_set_property (GObject * object, guint prop_id,
goto beach;
}
play_bin->pending_visualisation = pending_visualisation;
/* Block with callback */
gst_pad_set_blocked_async (tee_pad, TRUE, gst_play_bin_vis_blocked,
play_bin);
@ -709,12 +717,10 @@ gst_play_bin_set_property (GObject * object, guint prop_id,
}
gst_object_unref (vis_bin);
} else {
play_bin->visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
play_bin->visualisation = pending_visualisation;
}
} else {
play_bin->visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
play_bin->visualisation = pending_visualisation;
}
}
break;