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gst/switch/gstswitch.c (gst_stream_selector_change_state)

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Original commit message from CVS:
2007-12-17  Andy Wingo  <wingo@pobox.com>

* gst/switch/gstswitch.c (gst_stream_selector_change_state)
(gst_stream_selector_block, gst_stream_selector_switch): Use the
cond mechanism instead of blocked pads. Patch 8/12.
This commit is contained in:
Andy Wingo 2007-12-17 15:01:55 +00:00
parent f0df840345
commit 044bde1d12
2 changed files with 31 additions and 47 deletions
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4
ChangeLog
View file

@ -1,5 +1,9 @@
2007-12-17 Andy Wingo <wingo@pobox.com>
* gst/switch/gstswitch.c (gst_stream_selector_change_state)
(gst_stream_selector_block, gst_stream_selector_switch): Use the
cond mechanism instead of blocked pads. Patch 8/12.
* gst/switch/gstswitch.h (struct _GstStreamSelector):
* gst/switch/gstswitch.c (gst_stream_selector_wait)

74
gst/switch/gstswitch.c
View file

@ -404,6 +404,8 @@ static GstPad *gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused);
static void gst_stream_selector_release_pad (GstElement * element,
GstPad * pad);
static GstStateChangeReturn gst_stream_selector_change_state (GstElement *
element, GstStateChange transition);
static GList *gst_stream_selector_get_linked_pads (GstPad * pad);
static GstCaps *gst_stream_selector_getcaps (GstPad * pad);
static void gst_stream_selector_block (GstStreamSelector * self);
@ -472,6 +474,7 @@ gst_stream_selector_class_init (GstStreamSelectorClass * klass)
gobject_class->dispose = gst_stream_selector_dispose;
gstelement_class->request_new_pad = gst_stream_selector_request_new_pad;
gstelement_class->release_pad = gst_stream_selector_release_pad;
gstelement_class->change_state = gst_stream_selector_change_state;
/**
* GstStreamSelector::block:
@ -796,62 +799,36 @@ gst_stream_selector_release_pad (GstElement * element, GstPad * pad)
gst_element_remove_pad (GST_ELEMENT (sel), pad);
}
static void
block_func (GstPad * pad, gboolean blocked, gpointer user_data)
static GstStateChangeReturn
gst_stream_selector_change_state (GstElement * element,
GstStateChange transition)
{
GST_DEBUG_OBJECT (pad, "got blocked = %d", blocked ? 1 : 0);
}
GstStreamSelector *self = GST_STREAM_SELECTOR (element);
GstStateChangeReturn result;
static void
foreach_set_blocking (GstPad * pad, gpointer user_data)
{
gboolean block = GPOINTER_TO_INT (user_data);
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
gst_pad_set_blocked_async (pad, block, block_func, NULL);
}
static gboolean
block_all_pads (GstStreamSelector * self, gboolean block)
{
GstIterator *iter;
GstIteratorResult res;
g_return_val_if_fail (self->blocked != block, FALSE);
iter = gst_element_iterate_sink_pads (GST_ELEMENT (self));
while (TRUE) {
res = gst_iterator_foreach (iter, (GFunc) foreach_set_blocking,
GINT_TO_POINTER (block));
switch (res) {
case GST_ITERATOR_RESYNC:
gst_iterator_resync (iter);
break;
case GST_ITERATOR_DONE:
goto done;
default:
goto error;
}
if (transition == GST_STATE_CHANGE_PAUSED_TO_READY) {
GST_OBJECT_LOCK (self);
self->blocked = FALSE;
g_cond_broadcast (self->blocked_cond);
GST_OBJECT_UNLOCK (self);
}
done:
GST_DEBUG_OBJECT (self, "block_all_pads(%d) succeeded", block);
gst_iterator_free (iter);
self->blocked = block;
return TRUE;
error:
GST_WARNING_OBJECT (self, "block(%d) signal error: %d", block, res);
gst_iterator_free (iter);
return FALSE;
return result;
}
/* FIXME: blocked flag not mt-safe */
static void
gst_stream_selector_block (GstStreamSelector * self)
{
block_all_pads (self, TRUE);
GST_OBJECT_LOCK (self);
if (self->blocked)
GST_WARNING_OBJECT (self, "switch already blocked");
self->blocked = TRUE;
GST_OBJECT_UNLOCK (self);
}
static void
@ -884,7 +861,10 @@ gst_stream_selector_switch (GstStreamSelector * self, const gchar * pad_name,
gst_stream_selector_set_active_pad (self, pad_name, stop_time, start_time);
block_all_pads (self, FALSE);
GST_OBJECT_LOCK (self);
self->blocked = FALSE;
g_cond_broadcast (self->blocked_cond);
GST_OBJECT_UNLOCK (self);
}
static gboolean