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autovideoconvert: Add autoconvert child before chaining up to parent state change function

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...and remove/unlink autoconvert child when going back to NULL.
This commit is contained in:
Sebastian Dröge 2010-12-19 11:20:25 +01:00
parent 0df8460419
commit 530eca9984
1 changed files with 48 additions and 9 deletions
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57
gst/autoconvert/gstautovideoconvert.c
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@ -166,16 +166,25 @@ gst_auto_video_convert_class_init (GstAutoVideoConvertClass * klass)
}
static void
static gboolean
gst_auto_video_convert_add_autoconvert (GstAutoVideoConvert * autovideoconvert)
{
GstPad *pad;
if (autovideoconvert->autoconvert)
return TRUE;
autovideoconvert->autoconvert =
gst_element_factory_make ("autoconvert", "autoconvertchild");
if (!autovideoconvert->autoconvert) {
GST_ERROR_OBJECT (autovideoconvert,
"Could not create autoconvert instance");
return FALSE;
}
/* first add autoconvert in bin */
gst_bin_add (GST_BIN (autovideoconvert), autovideoconvert->autoconvert);
gst_bin_add (GST_BIN (autovideoconvert),
gst_object_ref (autovideoconvert->autoconvert));
/* get sinkpad and link it to ghost sink pad */
pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "sink");
@ -187,6 +196,25 @@ gst_auto_video_convert_add_autoconvert (GstAutoVideoConvert * autovideoconvert)
pad = gst_element_get_static_pad (autovideoconvert->autoconvert, "src");
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad), pad);
gst_object_unref (pad);
return TRUE;
}
static void
gst_auto_video_convert_remove_autoconvert (GstAutoVideoConvert *
autovideoconvert)
{
if (!autovideoconvert->autoconvert)
return;
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->srcpad),
NULL);
gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (autovideoconvert->sinkpad),
NULL);
gst_bin_remove (GST_BIN (autovideoconvert), autovideoconvert->autoconvert);
gst_object_unref (autovideoconvert->autoconvert);
autovideoconvert->autoconvert = NULL;
}
static void
@ -221,23 +249,34 @@ gst_auto_video_convert_change_state (GstElement * element,
GstAutoVideoConvert *autovideoconvert = GST_AUTO_VIDEO_CONVERT (element);
GstStateChangeReturn ret;
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
{
/* create and add autoconvert in bin */
gst_auto_video_convert_add_autoconvert (autovideoconvert);
if (!gst_auto_video_convert_add_autoconvert (autovideoconvert)) {
ret = GST_STATE_CHANGE_FAILURE;
return ret;
}
/* get an updated list of factories */
gst_auto_video_convert_update_factory_list (autovideoconvert);
GST_DEBUG_OBJECT (autovideoconvert, "set factories list");
/* give factory list to autoconvert */
g_object_set (GST_ELEMENT (autovideoconvert->autoconvert), "factories",
factories, NULL);
/* synchronize autoconvert state with parent state */
gst_element_sync_state_with_parent (autovideoconvert->autoconvert);
break;
}
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
{
gst_auto_video_convert_remove_autoconvert (autovideoconvert);
break;
}
default: