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framepositioner: Install operator property only when compositor is used

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Other compositor/mixer elements might not have the property. For instance,
d3d11compositor and glvideomixer define graphics API specific blending
properties, instead of simple "operator" one.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/242>
This commit is contained in:
Seungha Yang 2021-04-24 00:55:45 +09:00
parent 60856d5a6f
commit eaaaf78090
1 changed files with 23 additions and 12 deletions
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35
ges/gstframepositioner.c
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@ -93,16 +93,21 @@ gst_compositor_operator_get_type_and_default_value (int *default_operator_value)
GParamSpec *pspec =
g_object_class_find_property (G_OBJECT_GET_CLASS (compositorPad),
"operator");
GType ret = 0;
*default_operator_value =
g_value_get_enum (g_param_spec_get_default_value (pspec));
g_return_val_if_fail (pspec, G_TYPE_NONE);
if (pspec) {
*default_operator_value =
g_value_get_enum (g_param_spec_get_default_value (pspec));
g_return_val_if_fail (pspec, G_TYPE_NONE);
ret = pspec->value_type;
}
gst_element_release_request_pad (compositor, compositorPad);
gst_object_unref (compositorPad);
gst_object_unref (compositor);
return pspec->value_type;
return ret;
}
static void
@ -451,10 +456,11 @@ gst_frame_positioner_dispose (GObject * object)
static void
gst_frame_positioner_class_init (GstFramePositionerClass * klass)
{
int default_operator_value;
int default_operator_value = 0;
GType operator_gtype =
gst_compositor_operator_get_type_and_default_value
(&default_operator_value);
guint n_pspecs = PROP_LAST;
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseTransformClass *base_transform_class =
@ -536,13 +542,18 @@ gst_frame_positioner_class_init (GstFramePositionerClass * klass)
*
* The blending operator for the source.
*/
properties[PROP_OPERATOR] =
g_param_spec_enum ("operator", "Operator",
"Blending operator to use for blending this pad over the previous ones",
operator_gtype, default_operator_value,
(G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE | G_PARAM_STATIC_STRINGS));
if (operator_gtype) {
properties[PROP_OPERATOR] =
g_param_spec_enum ("operator", "Operator",
"Blending operator to use for blending this pad over the previous ones",
operator_gtype, default_operator_value,
(G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE |
GST_PARAM_CONDITIONALLY_AVAILABLE | G_PARAM_STATIC_STRINGS));
} else {
n_pspecs--;
}
g_object_class_install_properties (gobject_class, PROP_LAST, properties);
g_object_class_install_properties (gobject_class, n_pspecs, properties);
gst_element_class_set_static_metadata (GST_ELEMENT_CLASS (klass),
"frame positioner", "Metadata",
@ -708,7 +719,7 @@ static gboolean
gst_frame_positioner_meta_init (GstMeta * meta, gpointer params,
GstBuffer * buffer)
{
int default_operator_value;
int default_operator_value = 0;
GstFramePositionerMeta *smeta;
smeta = (GstFramePositionerMeta *) meta;