/**
* gst_child_proxy_set_property:
* @object: the parent object
* @name: name of the property to set
* @value: new #GValue for the property
*
* Sets a single property using the GstChildProxy mechanism.
*/
void
gst_child_proxy_set_property (GstChildProxy * object, const gchar * name,
const GValue * value)
{
GParamSpec *pspec;
GObject *target;
g_return_if_fail (GST_IS_CHILD_PROXY (object));
g_return_if_fail (name != NULL);
g_return_if_fail (G_IS_VALUE (value));
if (!gst_child_proxy_lookup (object, name, &target, &pspec))
goto not_found;
g_object_set_property (target, pspec->name, value);
g_object_unref (target);
return;
not_found:
{
g_warning ("cannot set property %s on object %s", name,
(GST_IS_OBJECT (object) ? GST_OBJECT_NAME (object) : ""));
return;
}
}
bool ChildProxy::findChildProperty(const char *name, QGlib::ObjectPtr *obj,
QGlib::ParamSpecPtr *paramSpec) const
{
GObject *op;
GParamSpec *pp;
bool result = gst_child_proxy_lookup(object<GstChildProxy>(), name, &op, &pp);
if (result) {
*obj = QGlib::ObjectPtr::wrap(op, false);
*paramSpec = QGlib::ParamSpecPtr::wrap(pp, false);
}
return result;
}
/**
* gst_child_proxy_set_valist:
* @object: the parent object
* @first_property_name: name of the first property to set
* @var_args: value for the first property, followed optionally by more name/value pairs, followed by NULL
*
* Sets properties of the parent object and its children.
*/
void
gst_child_proxy_set_valist (GstChildProxy * object,
const gchar * first_property_name, va_list var_args)
{
const gchar *name;
gchar *error = NULL;
GValue value = { 0, };
GParamSpec *pspec;
GObject *target;
g_return_if_fail (GST_IS_CHILD_PROXY (object));
name = first_property_name;
/* iterate over pairs */
while (name) {
if (!gst_child_proxy_lookup (object, name, &target, &pspec))
goto not_found;
G_VALUE_COLLECT_INIT (&value, pspec->value_type, var_args,
G_VALUE_NOCOPY_CONTENTS, &error);
if (error)
goto cant_copy;
g_object_set_property (target, pspec->name, &value);
g_object_unref (target);
g_value_unset (&value);
name = va_arg (var_args, gchar *);
}
return;
not_found:
{
g_warning ("no property %s in object %s", name,
(GST_IS_OBJECT (object) ? GST_OBJECT_NAME (object) : ""));
return;
}
cant_copy:
{
g_warning ("error copying value %s in object %s: %s", pspec->name,
(GST_IS_OBJECT (object) ? GST_OBJECT_NAME (object) : ""), error);
g_value_unset (&value);
g_object_unref (target);
return;
}
}
/* save the preset with the given name */
static gboolean
gst_preset_default_save_preset (GstPreset * preset, const gchar * name)
{
GKeyFile *presets;
gchar **props;
guint i;
GObjectClass *gclass;
gboolean is_child_proxy;
GST_INFO_OBJECT (preset, "saving new preset: %s", name);
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
goto no_presets;
/* take copies of current gobject properties from preset */
if (!(props = gst_preset_get_property_names (preset)))
goto no_properties;
gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (preset));
is_child_proxy = GST_IS_CHILD_PROXY (preset);
/* loop over the object properties and store the property value in the
* keyfile */
for (i = 0; props[i]; i++) {
GValue gvalue = { 0, };
gchar *str;
GParamSpec *property = NULL;
if (is_child_proxy) {
gst_child_proxy_lookup ((GstChildProxy *) preset, props[i], NULL,
&property);
} else {
property = g_object_class_find_property (gclass, props[i]);
}
if (!property) {
/* the element said it supported the property but then it does not have
* that property. This should not happen. */
GST_WARNING_OBJECT (preset, "property '%s' not in object", props[i]);
continue;
}
g_value_init (&gvalue, property->value_type);
if (is_child_proxy) {
gst_child_proxy_get_property ((GstChildProxy *) preset, props[i],
&gvalue);
} else {
g_object_get_property ((GObject *) preset, props[i], &gvalue);
}
if ((str = gst_value_serialize (&gvalue))) {
g_key_file_set_string (presets, name, props[i], (gpointer) str);
g_free (str);
} else {
GST_WARNING_OBJECT (preset, "serialization for property '%s' failed",
props[i]);
}
g_value_unset (&gvalue);
}
GST_INFO_OBJECT (preset, " saved");
g_strfreev (props);
/* save updated version */
return gst_preset_default_save_presets_file (preset);
/* ERRORS */
no_presets:
{
GST_WARNING_OBJECT (preset, "no presets");
return FALSE;
}
no_properties:
{
GST_INFO_OBJECT (preset, "no properties");
return FALSE;
}
}
/* load the presets of @name for the instance @preset. Returns %FALSE if something
* failed. */
static gboolean
gst_preset_default_load_preset (GstPreset * preset, const gchar * name)
{
GKeyFile *presets;
gchar **props;
guint i;
GObjectClass *gclass;
gboolean is_child_proxy;
/* get the presets from the type */
if (!(presets = preset_get_keyfile (preset)))
goto no_presets;
/* get the preset name */
if (!g_key_file_has_group (presets, name))
goto no_group;
GST_DEBUG_OBJECT (preset, "loading preset : '%s'", name);
/* get the properties that we can configure in this element */
if (!(props = gst_preset_get_property_names (preset)))
goto no_properties;
gclass = G_OBJECT_CLASS (GST_ELEMENT_GET_CLASS (preset));
is_child_proxy = GST_IS_CHILD_PROXY (preset);
/* for each of the property names, find the preset parameter and try to
* configure the property with its value */
for (i = 0; props[i]; i++) {
gchar *str;
GValue gvalue = { 0, };
GParamSpec *property = NULL;
/* check if we have a settings for this element property */
if (!(str = g_key_file_get_value (presets, name, props[i], NULL))) {
/* the element has a property but the parameter is not in the keyfile */
GST_WARNING_OBJECT (preset, "parameter '%s' not in preset", props[i]);
continue;
}
GST_DEBUG_OBJECT (preset, "setting value '%s' for property '%s'", str,
props[i]);
if (is_child_proxy) {
gst_child_proxy_lookup ((GstChildProxy *) preset, props[i], NULL,
&property);
} else {
property = g_object_class_find_property (gclass, props[i]);
}
if (!property) {
/* the parameter was in the keyfile, the element said it supported it but
* then the property was not found in the element. This should not happen. */
GST_WARNING_OBJECT (preset, "property '%s' not in object", props[i]);
g_free (str);
continue;
}
/* try to deserialize the property value from the keyfile and set it as
* the object property */
g_value_init (&gvalue, property->value_type);
if (gst_value_deserialize (&gvalue, str)) {
if (is_child_proxy) {
gst_child_proxy_set_property ((GstChildProxy *) preset, props[i],
&gvalue);
} else {
g_object_set_property ((GObject *) preset, props[i], &gvalue);
}
} else {
GST_WARNING_OBJECT (preset,
"deserialization of value '%s' for property '%s' failed", str,
props[i]);
}
g_value_unset (&gvalue);
g_free (str);
}
g_strfreev (props);
return TRUE;
/* ERRORS */
no_presets:
{
GST_WARNING_OBJECT (preset, "no presets");
return FALSE;
}
no_group:
{
GST_WARNING_OBJECT (preset, "no preset named '%s'", name);
return FALSE;
}
no_properties:
{
GST_INFO_OBJECT (preset, "no properties");
return FALSE;
}
}
