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pulsesink: Create and free the PA mainloop in NULL->READY/READY->NULL

Browse source 
This fixes a race condition, when stopping the mainloop during finalization
is done from a mainloop callback.

Fixes bugs #614765 and #590662.
This commit is contained in:
Sebastian Dröge 2010-05-06 13:51:59 +02:00
parent 85c6b9b712
commit 5332287e2d
1 changed files with 43 additions and 11 deletions
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54
ext/pulse/pulsesink.c
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@ -1405,6 +1405,9 @@ static void gst_pulsesink_finalize (GObject * object);
static gboolean gst_pulsesink_event (GstBaseSink * sink, GstEvent * event);
static GstStateChangeReturn gst_pulsesink_change_state (GstElement * element,
GstStateChange transition);
static void gst_pulsesink_init_interfaces (GType type);
#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
@ -1544,6 +1547,7 @@ gst_pulsesink_class_init (GstPulseSinkClass * klass)
GstBaseSinkClass *gstbasesink_class = GST_BASE_SINK_CLASS (klass);
GstBaseSinkClass *bc;
GstBaseAudioSinkClass *gstaudiosink_class = GST_BASE_AUDIO_SINK_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_pulsesink_finalize);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_pulsesink_set_property);
@ -1555,6 +1559,9 @@ gst_pulsesink_class_init (GstPulseSinkClass * klass)
bc = g_type_class_peek (GST_TYPE_BASE_SINK);
gstbasesink_class->activate_pull = GST_DEBUG_FUNCPTR (bc->activate_pull);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_pulsesink_change_state);
gstaudiosink_class->create_ringbuffer =
GST_DEBUG_FUNCPTR (gst_pulsesink_create_ringbuffer);
@ -1635,8 +1642,6 @@ server_dead:
static void
gst_pulsesink_init (GstPulseSink * pulsesink, GstPulseSinkClass * klass)
{
guint res;
pulsesink->server = NULL;
pulsesink->device = NULL;
pulsesink->device_description = NULL;
@ -1655,11 +1660,6 @@ gst_pulsesink_init (GstPulseSink * pulsesink, GstPulseSinkClass * klass)
GST_DEBUG_OBJECT (pulsesink, "using pulseaudio version %s",
pulsesink->pa_version);
pulsesink->mainloop = pa_threaded_mainloop_new ();
g_assert (pulsesink->mainloop != NULL);
res = pa_threaded_mainloop_start (pulsesink->mainloop);
g_assert (res == 0);
/* TRUE for sinks, FALSE for sources */
pulsesink->probe = gst_pulseprobe_new (G_OBJECT (pulsesink),
G_OBJECT_GET_CLASS (pulsesink), PROP_DEVICE, pulsesink->device,
@ -1678,14 +1678,10 @@ gst_pulsesink_finalize (GObject * object)
{
GstPulseSink *pulsesink = GST_PULSESINK_CAST (object);
pa_threaded_mainloop_stop (pulsesink->mainloop);
g_free (pulsesink->server);
g_free (pulsesink->device);
g_free (pulsesink->device_description);
pa_threaded_mainloop_free (pulsesink->mainloop);
if (pulsesink->probe) {
gst_pulseprobe_free (pulsesink->probe);
pulsesink->probe = NULL;
@ -2264,3 +2260,39 @@ gst_pulsesink_event (GstBaseSink * sink, GstEvent * event)
return GST_BASE_SINK_CLASS (parent_class)->event (sink, event);
}
static GstStateChangeReturn
gst_pulsesink_change_state (GstElement * element, GstStateChange transition)
{
GstPulseSink *pulsesink = GST_PULSESINK (element);
GstStateChangeReturn ret;
guint res;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
g_assert (pulsesink->mainloop == NULL);
pulsesink->mainloop = pa_threaded_mainloop_new ();
g_assert (pulsesink->mainloop != NULL);
res = pa_threaded_mainloop_start (pulsesink->mainloop);
g_assert (res == 0);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
if (pulsesink->mainloop) {
pa_threaded_mainloop_stop (pulsesink->mainloop);
pa_threaded_mainloop_free (pulsesink->mainloop);
pulsesink->mainloop = NULL;
}
break;
default:
break;
}
return ret;
}