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timeline-standard-transition: Override the GESExtractable implementation

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Standard transition material have the vtype property as ID, it has the particularity
that the ID can be changed at runtime

	+ Implement tests to make sure it behaves properly
This commit is contained in:
Thibault Saunier 2012-11-26 17:27:24 -03:00
parent c1110f2c85
commit e47701b226
1 changed files with 129 additions and 7 deletions
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136
ges/ges-timeline-standard-transition.c
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@ -26,8 +26,8 @@
* Creates an object that mixes together the two underlying objects, A and B.
* The A object is assumed to have a higher prioirity (lower number) than the
* B object. At the transition in point, only A will be visible, and by the
* end only B will be visible.
*
* end only B will be visible.
*
* The shape of the video transition depends on the value of the "vtype"
* property. The default value is "crossfade". For audio, only "crossfade" is
* supported.
@ -35,6 +35,10 @@
* #GESSimpleTimelineLayer will automatically manage the priorities of sources
* and transitions. If you use #GESTimelineStandardTransitions in another type of
* #GESTimelineLayer, you will need to manage priorities yourself.
*
* The ID of the ExtractableType is the nickname of the vtype property value. Note
* that this value can be changed after creation and the GESExtractable.asset value
* will be updated when needed.
*/
#include <ges/ges.h>
@ -43,6 +47,8 @@
struct _GESTimelineStandardTransitionPrivate
{
GSList *track_video_transitions;
const gchar *vtype_name;
};
enum
@ -50,9 +56,6 @@ enum
PROP_VTYPE = 5,
};
G_DEFINE_TYPE (GESTimelineStandardTransition, ges_timeline_standard_transition,
GES_TYPE_TIMELINE_TRANSITION);
static GESTrackObject *ges_tl_transition_create_track_object (GESTimelineObject
* self, GESTrack * track);
static void
@ -62,14 +65,33 @@ static void
ges_timeline_standard_transition_track_object_released (GESTimelineObject * obj,
GESTrackObject * tckobj);
/* Internal methods */
static void
ges_timeline_standard_transition_update_vtype_internal (GESTimelineObject *
self, GESVideoStandardTransitionType value)
self, GESVideoStandardTransitionType value, gboolean set_asset)
{
GSList *tmp;
guint index;
GEnumClass *enum_class;
const gchar *asset_id = NULL;
GESTimelineStandardTransition *trself =
GES_TIMELINE_STANDARD_TRANSITION (self);
enum_class = g_type_class_peek (GES_VIDEO_STANDARD_TRANSITION_TYPE_TYPE);
for (index = 0; index < enum_class->n_values; index++) {
if (enum_class->values[index].value == value) {
asset_id = enum_class->values[index].value_nick;
break;
}
}
if (asset_id == NULL) {
GST_WARNING_OBJECT (self, "Wrong transition type value: %i can not set it",
value);
return;
}
for (tmp = trself->priv->track_video_transitions; tmp; tmp = tmp->next) {
if (!ges_track_video_transition_set_transition_type
(GES_TRACK_VIDEO_TRANSITION (tmp->data), value))
@ -77,8 +99,107 @@ ges_timeline_standard_transition_update_vtype_internal (GESTimelineObject *
}
trself->vtype = value;
trself->priv->vtype_name = asset_id;
if (set_asset) {
/* We already checked the value, so we can be sure no error will accured */
ges_extractable_set_asset (GES_EXTRACTABLE (self),
ges_asset_request (GES_TYPE_TIMELINE_STANDARD_TRANSITION,
asset_id, NULL));
}
}
/* GESExtractable interface overrides */
static GParameter *
extractable_get_parameters_from_id (const gchar * id, guint * n_params)
{
GEnumClass *enum_class =
g_type_class_peek (GES_VIDEO_STANDARD_TRANSITION_TYPE_TYPE);
GParameter *params = g_new0 (GParameter, 1);
GEnumValue *value = g_enum_get_value_by_nick (enum_class, id);
params[0].name = g_strdup ("vtype");
g_value_init (&params[0].value, GES_VIDEO_STANDARD_TRANSITION_TYPE_TYPE);
g_value_set_enum (&params[0].value, value->value);
*n_params = 1;
return params;
}
static gchar *
extractable_check_id (GType type, const gchar * id)
{
guint index;
GEnumClass *enum_class;
enum_class = g_type_class_peek (GES_VIDEO_STANDARD_TRANSITION_TYPE_TYPE);
for (index = 0; index < enum_class->n_values; index++) {
if (g_strcmp0 (enum_class->values[index].value_nick, id) == 0)
return g_strdup (id);
}
return NULL;
}
static gchar *
extractable_get_id (GESExtractable * self)
{
guint index;
GEnumClass *enum_class;
guint value = GES_TIMELINE_STANDARD_TRANSITION (self)->vtype;
enum_class = g_type_class_peek (GES_VIDEO_STANDARD_TRANSITION_TYPE_TYPE);
for (index = 0; index < enum_class->n_values; index++) {
if (enum_class->values[index].value == value)
return g_strdup (enum_class->values[index].value_nick);
}
return NULL;
}
static void
extractable_set_asset (GESExtractable * self, GESAsset * asset)
{
GEnumClass *enum_class;
GESVideoStandardTransitionType value;
GESTimelineStandardTransition *trans =
GES_TIMELINE_STANDARD_TRANSITION (self);
const gchar *vtype = ges_asset_get_id (asset);
/* Update the transition type if we actually changed it */
if (g_strcmp0 (vtype, trans->priv->vtype_name)) {
guint index;
value = GES_VIDEO_STANDARD_TRANSITION_TYPE_CROSSFADE;
enum_class = g_type_class_peek (GES_VIDEO_STANDARD_TRANSITION_TYPE_TYPE);
/* Find the in value in use */
for (index = 0; index < enum_class->n_values; index++) {
if (g_strcmp0 (enum_class->values[index].value_nick, vtype) == 0) {
value = enum_class->values[index].value;
break;
}
}
ges_timeline_standard_transition_update_vtype_internal
(GES_TIMELINE_OBJECT (self), value, FALSE);
}
}
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->check_id = (GESExtractableCheckId) extractable_check_id;
iface->get_id = extractable_get_id;
iface->get_parameters_from_id = extractable_get_parameters_from_id;
iface->can_update_asset = TRUE;
iface->set_asset = extractable_set_asset;
}
G_DEFINE_TYPE_WITH_CODE (GESTimelineStandardTransition,
ges_timeline_standard_transition, GES_TYPE_TIMELINE_TRANSITION,
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE,
ges_extractable_interface_init));
static void
ges_timeline_standard_transition_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec)
@ -103,7 +224,7 @@ ges_timeline_standard_transition_set_property (GObject * object,
switch (property_id) {
case PROP_VTYPE:
ges_timeline_standard_transition_update_vtype_internal (self,
g_value_get_enum (value));
g_value_get_enum (value), TRUE);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
@ -153,6 +274,7 @@ ges_timeline_standard_transition_init (GESTimelineStandardTransition * self)
GESTimelineStandardTransitionPrivate);
self->vtype = GES_VIDEO_STANDARD_TRANSITION_TYPE_NONE;
self->priv->vtype_name = NULL;
}
static void