gstreamer/ges/ges-timeline-layer.c

1018 lines
30 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
* 2011 Mathieu Duponchelle <mathieu.duponchelle@epitech.eu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:ges-timeline-layer
* @short_description: Non-overlapping sequence of #GESTimelineObject
*
* Responsible for the ordering of the various contained TimelineObject(s). A
* timeline layer has a "priority" property, which is used to manage the
* priorities of individual TimelineObjects. Two layers should not have the
* same priority within a given timeline.
*/
#include "ges-internal.h"
#include "gesmarshal.h"
#include "ges-timeline-layer.h"
#include "ges.h"
#include "ges-timeline-source.h"
#define LAYER_HEIGHT 1000
static void
track_object_removed_cb (GESTimelineObject * object,
GESTrackObject * track_object);
static void track_object_added_cb (GESTimelineObject * object,
GESTrackObject * track_object, GHashTable * signal_table);
static void track_object_changed_cb (GESTrackObject * track_object,
GParamSpec * arg G_GNUC_UNUSED);
static void calculate_transitions (GESTrackObject * track_object);
static void calculate_next_transition (GESTrackObject * track_object,
GESTimelineLayer * layer);
static void
timeline_object_height_changed_cb (GESTimelineObject * obj,
GESTrackEffect * tr_eff, GESTimelineObject * second_obj);
G_DEFINE_TYPE (GESTimelineLayer, ges_timeline_layer, G_TYPE_INITIALLY_UNOWNED);
struct _GESTimelineLayerPrivate
{
/*< private > */
GList *objects_start; /* The TimelineObjects sorted by start and
* priority */
guint32 priority; /* The priority of the layer within the
* containing timeline */
gboolean auto_transition;
GHashTable *signal_table;
};
enum
{
PROP_0,
PROP_PRIORITY,
PROP_AUTO_TRANSITION,
PROP_LAST
};
enum
{
OBJECT_ADDED,
OBJECT_REMOVED,
LAST_SIGNAL
};
static guint ges_timeline_layer_signals[LAST_SIGNAL] = { 0 };
static gboolean ges_timeline_layer_resync_priorities (GESTimelineLayer * layer);
static GList *track_get_by_layer (GESTimelineLayer * layer, GESTrack * track);
static void compare (GList * compared, GESTrackObject * track_object,
gboolean ahead);
static void
ges_timeline_layer_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTimelineLayer *layer = GES_TIMELINE_LAYER (object);
switch (property_id) {
case PROP_PRIORITY:
g_value_set_uint (value, layer->priv->priority);
break;
case PROP_AUTO_TRANSITION:
g_value_set_boolean (value, layer->priv->auto_transition);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_timeline_layer_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTimelineLayer *layer = GES_TIMELINE_LAYER (object);
switch (property_id) {
case PROP_PRIORITY:
ges_timeline_layer_set_priority (layer, g_value_get_uint (value));
break;
case PROP_AUTO_TRANSITION:
ges_timeline_layer_set_auto_transition (layer,
g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_timeline_layer_dispose (GObject * object)
{
GESTimelineLayer *layer = GES_TIMELINE_LAYER (object);
GESTimelineLayerPrivate *priv = layer->priv;
GST_DEBUG ("Disposing layer");
while (priv->objects_start)
ges_timeline_layer_remove_object (layer,
(GESTimelineObject *) priv->objects_start->data);
G_OBJECT_CLASS (ges_timeline_layer_parent_class)->dispose (object);
}
static void
ges_timeline_layer_class_init (GESTimelineLayerClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESTimelineLayerPrivate));
object_class->get_property = ges_timeline_layer_get_property;
object_class->set_property = ges_timeline_layer_set_property;
object_class->dispose = ges_timeline_layer_dispose;
/**
* GESTimelineLayer:priority
*
* The priority of the layer in the #GESTimeline. 0 is the highest
* priority. Conceptually, a #GESTimeline is a stack of GESTimelineLayers,
* and the priority of the layer represents its position in the stack. Two
* layers should not have the same priority within a given GESTimeline.
*/
g_object_class_install_property (object_class, PROP_PRIORITY,
g_param_spec_uint ("priority", "Priority",
"The priority of the layer", 0, G_MAXUINT, 0, G_PARAM_READWRITE));
/**
* GESTimelineLayer:auto-transition
*
* Sets whether transitions are added automagically when timeline objects overlap.
*/
g_object_class_install_property (object_class, PROP_AUTO_TRANSITION,
g_param_spec_boolean ("auto-transition", "Auto-Transition",
"whether the transitions are added", FALSE, G_PARAM_READWRITE));
/**
* GESTimelineLayer::object-added
* @layer: the #GESTimelineLayer
* @object: the #GESTimelineObject that was added.
*
* Will be emitted after the object was added to the layer.
*/
ges_timeline_layer_signals[OBJECT_ADDED] =
g_signal_new ("object-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineLayerClass, object_added),
NULL, NULL, ges_marshal_VOID__OBJECT, G_TYPE_NONE, 1,
GES_TYPE_TIMELINE_OBJECT);
/**
* GESTimelineLayer::object-removed
* @layer: the #GESTimelineLayer
* @object: the #GESTimelineObject that was removed
*
* Will be emitted after the object was removed from the layer.
*/
ges_timeline_layer_signals[OBJECT_REMOVED] =
g_signal_new ("object-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineLayerClass,
object_removed), NULL, NULL, ges_marshal_VOID__OBJECT, G_TYPE_NONE, 1,
GES_TYPE_TIMELINE_OBJECT);
}
static void
ges_timeline_layer_init (GESTimelineLayer * self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_TIMELINE_LAYER, GESTimelineLayerPrivate);
self->priv->priority = 0;
self->priv->auto_transition = FALSE;
self->min_gnl_priority = 0;
self->max_gnl_priority = LAYER_HEIGHT;
self->priv->signal_table =
g_hash_table_new_full (g_direct_hash, g_direct_equal, g_object_unref,
NULL);
}
/**
* ges_timeline_layer_new:
*
* Creates a new #GESTimelineLayer.
*
* Returns: A new #GESTimelineLayer
*/
GESTimelineLayer *
ges_timeline_layer_new (void)
{
return g_object_new (GES_TYPE_TIMELINE_LAYER, NULL);
}
/**
* ges_timeline_layer_get_timeline:
* @layer: The #GESTimelineLayer to get the parent #GESTimeline from
*
* Get the #GESTimeline in which #GESTimelineLayer currently is.
*
* Returns: (transfer none): the #GESTimeline in which #GESTimelineLayer
* currently is or %NULL if not in any timeline yet.
*/
GESTimeline *
ges_timeline_layer_get_timeline (GESTimelineLayer * layer)
{
g_return_val_if_fail (GES_IS_TIMELINE_LAYER (layer), NULL);
return layer->timeline;
}
void
ges_timeline_layer_set_timeline (GESTimelineLayer * layer,
GESTimeline * timeline)
{
GST_DEBUG ("layer:%p, timeline:%p", layer, timeline);
layer->timeline = timeline;
}
static gint
objects_start_compare (GESTimelineObject * a, GESTimelineObject * b)
{
if (a->start == b->start) {
if (a->priority < b->priority)
return -1;
if (a->priority > b->priority)
return 1;
return 0;
}
if (a->start < b->start)
return -1;
if (a->start > b->start)
return 1;
return 0;
}
static GList *
track_get_by_layer (GESTimelineLayer * layer, GESTrack * track)
{
GList *tck_objects_list = NULL, *tmp = NULL, *return_list = NULL;
GESTimelineObject *tl_obj;
tck_objects_list = ges_track_get_objects (track);
for (tmp = tck_objects_list; tmp; tmp = tmp->next) {
tl_obj = ges_track_object_get_timeline_object (tmp->data);
if (ges_timeline_object_get_layer (tl_obj) == layer) {
/* We steal the reference from tck_objects_list */
return_list = g_list_append (return_list, tmp->data);
} else
g_object_unref (tmp->data);
}
return return_list;
}
/**
* ges_timeline_layer_add_object:
* @layer: a #GESTimelineLayer
* @object: (transfer full): the #GESTimelineObject to add.
*
* Adds the given object to the layer. Sets the object's parent, and thus
* takes ownership of the object.
*
* An object can only be added to one layer.
*
* Calling this method will construct and properly set all the media related
* elements on @object. If you need to know when those objects (actually #GESTrackObject)
* are constructed, you should connect to the object::track-object-added signal which
* is emited right after those elements are ready to be used.
*
* Returns: TRUE if the object was properly added to the layer, or FALSE
* if the @layer refuses to add the object.
*/
gboolean
ges_timeline_layer_add_object (GESTimelineLayer * layer,
GESTimelineObject * object)
{
GESTimelineLayer *tl_obj_layer;
guint32 maxprio, minprio, prio;
GST_DEBUG ("layer:%p, object:%p", layer, object);
tl_obj_layer = ges_timeline_object_get_layer (object);
if (G_UNLIKELY (tl_obj_layer)) {
GST_WARNING ("TimelineObject %p already belongs to another layer", object);
g_object_unref (tl_obj_layer);
return FALSE;
}
g_object_ref_sink (object);
/* Take a reference to the object and store it stored by start/priority */
layer->priv->objects_start =
g_list_insert_sorted (layer->priv->objects_start, object,
(GCompareFunc) objects_start_compare);
/* We have to wait for the track objects to be created to calculate transitions */
if (layer->priv->auto_transition) {
if (GES_IS_TIMELINE_SOURCE (object)) {
g_signal_connect (G_OBJECT (object), "track-object-added",
G_CALLBACK (track_object_added_cb), layer->priv->signal_table);
g_signal_connect (G_OBJECT (object), "track-object-removed",
G_CALLBACK (track_object_removed_cb), NULL);
}
}
/* Inform the object it's now in this layer */
ges_timeline_object_set_layer (object, layer);
GST_DEBUG ("current object priority : %d, layer min/max : %d/%d",
GES_TIMELINE_OBJECT_PRIORITY (object),
layer->min_gnl_priority, layer->max_gnl_priority);
/* Set the priority. */
maxprio = layer->max_gnl_priority;
minprio = layer->min_gnl_priority;
prio = GES_TIMELINE_OBJECT_PRIORITY (object);
if (minprio + prio > (maxprio)) {
GST_WARNING ("%p is out of the layer %p space, setting its priority to "
"setting its priority %d to failthe maximum priority of the layer %d",
object, layer, prio, maxprio - minprio);
ges_timeline_object_set_priority (object, LAYER_HEIGHT - 1);
}
/* If the object has an acceptable priority, we just let it with its current
* priority */
ges_timeline_layer_resync_priorities (layer);
/* emit 'object-added' */
g_signal_emit (layer, ges_timeline_layer_signals[OBJECT_ADDED], 0, object);
return TRUE;
}
static void
track_object_duration_cb (GESTrackObject * track_object,
GParamSpec * arg G_GNUC_UNUSED)
{
GESTimelineLayer *layer;
GESTimelineObject *tlobj;
tlobj = ges_track_object_get_timeline_object (track_object);
layer = ges_timeline_object_get_layer (tlobj);
if (G_LIKELY (GES_IS_TRACK_SOURCE (track_object)))
calculate_next_transition (track_object, layer);
}
static void
track_object_deleted_cb (GESTrack * track, GESTrackObject * track_object)
{
GList *track_objects, *tmp, *cur;
GESTimelineLayer *layer;
track_objects = ges_track_get_objects (track);
cur = g_list_find (track_objects, track_object);
for (tmp = cur->next; tmp; tmp = tmp->next) {
if (GES_IS_TRACK_SOURCE (tmp->data)) {
break;
}
if (GES_IS_TRACK_AUDIO_TRANSITION (tmp->data)
|| GES_IS_TRACK_VIDEO_TRANSITION (tmp->data)) {
layer =
ges_timeline_object_get_layer (ges_track_object_get_timeline_object
(tmp->data));
if (ges_timeline_layer_get_auto_transition (layer)) {
ges_track_enable_update (track, FALSE);
ges_timeline_layer_remove_object (layer,
ges_track_object_get_timeline_object (tmp->data));
ges_track_enable_update (track, TRUE);
}
g_object_unref (layer);
}
}
for (tmp = cur->prev; tmp; tmp = tmp->prev) {
if (GES_IS_TRACK_SOURCE (tmp->data)) {
break;
}
if (GES_IS_TRACK_AUDIO_TRANSITION (tmp->data)
|| GES_IS_TRACK_VIDEO_TRANSITION (tmp->data)) {
layer =
ges_timeline_object_get_layer (ges_track_object_get_timeline_object
(tmp->data));
if (ges_timeline_layer_get_auto_transition (layer)) {
ges_track_enable_update (track, FALSE);
ges_timeline_layer_remove_object (layer,
ges_track_object_get_timeline_object (tmp->data));
ges_track_enable_update (track, TRUE);
}
g_object_unref (layer);
}
}
g_object_unref (track_object);
}
static void
track_object_added_cb (GESTimelineObject * object,
GESTrackObject * track_object, GHashTable * signal_table)
{
GESTrack *track;
gint ptr;
if (GES_IS_TRACK_SOURCE (track_object)) {
g_signal_connect (G_OBJECT (track_object), "notify::start",
G_CALLBACK (track_object_changed_cb), NULL);
g_signal_connect (G_OBJECT (track_object), "notify::duration",
G_CALLBACK (track_object_duration_cb), NULL);
calculate_transitions (track_object);
}
track = ges_track_object_get_track (track_object);
if (!g_hash_table_lookup (signal_table, track)) {
ptr = g_signal_connect (track, "track-object-removed",
(GCallback) track_object_deleted_cb, NULL);
g_hash_table_insert (signal_table, track, GINT_TO_POINTER (ptr));
}
return;
}
static void
track_object_removed_cb (GESTimelineObject * object,
GESTrackObject * track_object)
{
return;
if (GES_IS_TRACK_SOURCE (track_object)) {
g_signal_handlers_disconnect_by_func (track_object, track_object_changed_cb,
object);
}
return;
}
static void
timeline_object_height_changed_cb (GESTimelineObject * obj,
GESTrackEffect * tr_eff, GESTimelineObject * second_obj)
{
gint priority, height;
g_object_get (obj, "height", &height, "priority", &priority, NULL);
g_object_set (second_obj, "priority", priority + height, NULL);
}
static void
track_object_changed_cb (GESTrackObject * track_object,
GParamSpec * arg G_GNUC_UNUSED)
{
if (G_LIKELY (GES_IS_TRACK_SOURCE (track_object)))
calculate_transitions (track_object);
}
static void
calculate_next_transition_with_list (GESTrackObject * track_object,
GList * tckobjs_in_layer, GESTimelineLayer * layer)
{
GList *compared;
if (!(compared = g_list_find (tckobjs_in_layer, track_object)))
return;
if (compared == NULL)
/* This is the last TrackObject of the Track */
return;
do {
compared = compared->next;
if (compared == NULL)
return;
} while (!GES_IS_TRACK_SOURCE (compared->data));
compare (compared, track_object, FALSE);
}
static void
calculate_next_transition (GESTrackObject * track_object,
GESTimelineLayer * layer)
{
GESTrack *track;
GList *tckobjs_in_layer;
if ((track = ges_track_object_get_track (track_object))) {
tckobjs_in_layer = track_get_by_layer (layer, track);
calculate_next_transition_with_list (track_object, tckobjs_in_layer, layer);
g_list_foreach (tckobjs_in_layer, (GFunc) g_object_unref, NULL);
g_list_free (tckobjs_in_layer);
}
}
static void
calculate_transitions (GESTrackObject * track_object)
{
GList *tckobjs_in_layer, *compared;
GESTimelineLayer *layer;
GESTimelineObject *tlobj;
GESTrack *track = ges_track_object_get_track (track_object);
if (track == NULL)
return;
tlobj = ges_track_object_get_timeline_object (track_object);
layer = ges_timeline_object_get_layer (tlobj);
tckobjs_in_layer = track_get_by_layer (layer, track);
if (!(compared = g_list_find (tckobjs_in_layer, track_object)))
return;
do {
compared = compared->prev;
if (compared == NULL) {
/* Nothing before, let's check after */
calculate_next_transition_with_list (track_object, tckobjs_in_layer,
layer);
goto done;
}
} while (!GES_IS_TRACK_SOURCE (compared->data));
compare (compared, track_object, TRUE);
calculate_next_transition_with_list (track_object, tckobjs_in_layer, layer);
done:
g_list_foreach (tckobjs_in_layer, (GFunc) g_object_unref, NULL);
g_list_free (tckobjs_in_layer);
}
/* Compare:
* @compared: The #GList of #GESTrackObjects that we compare with @track_object
* @track_object: The #GESTrackObject that serves as a reference
* @ahead: %TRUE if we are comparing frontward %FALSE if we are comparing
* backward*/
static void
compare (GList * compared, GESTrackObject * track_object, gboolean ahead)
{
GList *tmp;
gint64 start, duration, compared_start, compared_duration, end, compared_end,
tr_start, tr_duration;
GESTimelineStandardTransition *trans = NULL;
GESTrack *track;
GESTimelineLayer *layer;
GESTimelineObject *object, *compared_object, *first_object, *second_object;
gint priority;
g_return_if_fail (compared);
GST_DEBUG ("Recalculating transitions");
object = ges_track_object_get_timeline_object (track_object);
if (!object) {
GST_WARNING ("Trackobject not in a timeline object: "
"Can not calulate transitions");
return;
}
compared_object = ges_track_object_get_timeline_object (compared->data);
layer = ges_timeline_object_get_layer (object);
start = ges_track_object_get_start (track_object);
duration = ges_track_object_get_duration (track_object);
compared_start = ges_track_object_get_start (compared->data);
compared_duration = ges_track_object_get_duration (compared->data);
end = start + duration;
compared_end = compared_start + compared_duration;
if (ahead) {
/* Make sure we remove the last transition we created it is not needed
* FIXME make it a smarter way */
if (compared->prev && GES_IS_TRACK_TRANSITION (compared->prev->data)) {
trans = GES_TIMELINE_STANDARD_TRANSITION
(ges_track_object_get_timeline_object (compared->prev->data));
g_object_get (compared->prev->data, "start", &tr_start, "duration",
&tr_duration, NULL);
if (tr_start >= compared_start && tr_start + tr_duration <= compared_end)
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
trans = NULL;
}
for (tmp = compared->next; tmp; tmp = tmp->next) {
/* If we have a transitionmnmnm we recaluculuculate its values */
if (GES_IS_TRACK_TRANSITION (tmp->data)) {
g_object_get (tmp->data, "start", &tr_start, "duration", &tr_duration,
NULL);
if (tr_start + tr_duration == compared_start + compared_duration) {
GESTimelineObject *tlobj;
tlobj = ges_track_object_get_timeline_object (tmp->data);
trans = GES_TIMELINE_STANDARD_TRANSITION (tlobj);
break;
}
}
}
if (compared_end <= start) {
if (trans) {
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
g_object_get (compared_object, "priority", &priority, NULL);
g_object_set (object, "priority", priority, NULL);
}
goto clean;
} else if (start > compared_start && end < compared_end) {
if (trans) {
/* Transition not needed anymore */
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
}
goto clean;
} else if (start <= compared_start) {
if (trans) {
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
}
goto clean;
}
} else {
if (compared->next && GES_IS_TRACK_TRANSITION (compared->next->data)) {
trans = GES_TIMELINE_STANDARD_TRANSITION
(ges_track_object_get_timeline_object (compared->next->data));
g_object_get (compared->prev->data, "start", &tr_start, "duration",
&tr_duration, NULL);
if (tr_start >= compared_start && tr_start + tr_duration <= compared_end)
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
trans = NULL;
}
for (tmp = compared->prev; tmp; tmp = tmp->prev) {
if GES_IS_TRACK_TRANSITION
(tmp->data) {
g_object_get (tmp->data, "start", &tr_start, "duration", &tr_duration,
NULL);
if (tr_start == compared_start) {
trans = GES_TIMELINE_STANDARD_TRANSITION
(ges_track_object_get_timeline_object (tmp->data));
break;
}
}
}
if (start + duration <= compared_start) {
if (trans) {
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
g_object_get (object, "priority", &priority, NULL);
g_object_set (compared_object, "priority", priority, NULL);
}
goto clean;
} else if (start > compared_start) {
if (trans)
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
goto clean;
} else if (start < compared_start && end > compared_end) {
if (trans) {
ges_timeline_layer_remove_object (layer, GES_TIMELINE_OBJECT (trans));
}
goto clean;
}
}
if (!trans) {
gint height;
trans =
ges_timeline_standard_transition_new_for_nick ((gchar *) "crossfade");
track = ges_track_object_get_track (track_object);
ges_timeline_object_set_supported_formats (GES_TIMELINE_OBJECT (trans),
track->type);
ges_timeline_layer_add_object (layer, GES_TIMELINE_OBJECT (trans));
if (ahead) {
first_object = ges_track_object_get_timeline_object (compared->data);
second_object = object;
} else {
second_object = ges_track_object_get_timeline_object (compared->data);
first_object = object;
}
g_object_get (first_object, "priority", &priority, "height", &height, NULL);
g_object_set (second_object, "priority", priority + height, NULL);
g_signal_connect (first_object, "notify::height",
(GCallback) timeline_object_height_changed_cb, second_object);
}
if (ahead) {
g_object_set (trans, "start", start, "duration",
compared_duration + compared_start - start, NULL);
} else {
g_object_set (trans, "start", compared_start, "duration",
start + duration - compared_start, NULL);
}
clean:
g_object_unref (layer);
}
static void
look_for_transition (GESTrackObject * track_object, GESTimelineLayer * layer)
{
GESTrack *track;
GList *track_objects, *tmp, *cur;
track = ges_track_object_get_track (track_object);
track_objects = ges_track_get_objects (track);
cur = g_list_find (track_objects, track_object);
for (tmp = cur->next; tmp; tmp = tmp->next) {
if (GES_IS_TRACK_SOURCE (tmp->data)) {
break;
}
if (GES_IS_TRACK_AUDIO_TRANSITION (tmp->data)
|| GES_IS_TRACK_VIDEO_TRANSITION (tmp->data)) {
ges_timeline_layer_remove_object (layer,
ges_track_object_get_timeline_object (tmp->data));
}
}
for (tmp = cur->prev; tmp; tmp = tmp->prev) {
if (GES_IS_TRACK_SOURCE (tmp->data)) {
break;
}
if (GES_IS_TRACK_AUDIO_TRANSITION (tmp->data)
|| GES_IS_TRACK_VIDEO_TRANSITION (tmp->data)) {
ges_timeline_layer_remove_object (layer,
ges_track_object_get_timeline_object (tmp->data));
}
}
g_list_foreach (track_objects, (GFunc) g_object_unref, NULL);
g_list_free (track_objects);
}
static gboolean
disconnect_handlers (GESTrack * track, gpointer * ptr)
{
g_signal_handler_disconnect (track, GPOINTER_TO_INT (ptr));
return TRUE;
}
/**
* ges_timeline_layer_remove_object:
* @layer: a #GESTimelineLayer
* @object: the #GESTimelineObject to remove
*
* Removes the given @object from the @layer and unparents it.
* Unparenting it means the reference owned by @layer on the @object will be
* removed. If you wish to use the @object after this function, make sure you
* call g_object_ref() before removing it from the @layer.
*
* Returns: TRUE if the object could be removed, FALSE if the layer does
* not want to remove the object.
*/
gboolean
ges_timeline_layer_remove_object (GESTimelineLayer * layer,
GESTimelineObject * object)
{
GESTimelineLayer *tl_obj_layer;
GList *trackobjects, *tmp;
g_return_val_if_fail (GES_IS_TIMELINE_LAYER (layer), FALSE);
g_return_val_if_fail (GES_IS_TIMELINE_OBJECT (object), FALSE);
GST_DEBUG ("layer:%p, object:%p", layer, object);
tl_obj_layer = ges_timeline_object_get_layer (object);
if (G_UNLIKELY (tl_obj_layer != layer)) {
GST_WARNING ("TimelineObject doesn't belong to this layer");
if (tl_obj_layer != NULL)
g_object_unref (tl_obj_layer);
return FALSE;
}
g_object_unref (tl_obj_layer);
if (layer->priv->auto_transition) {
trackobjects = ges_timeline_object_get_track_objects (object);
for (tmp = trackobjects; tmp; tmp = tmp->next) {
look_for_transition (tmp->data, layer);
}
g_list_foreach (trackobjects, (GFunc) g_object_unref, NULL);
g_list_free (trackobjects);
}
g_hash_table_foreach_remove (layer->priv->signal_table,
(GHRFunc) disconnect_handlers, NULL);
/* emit 'object-removed' */
g_signal_emit (layer, ges_timeline_layer_signals[OBJECT_REMOVED], 0, object);
/* inform the object it's no longer in a layer */
ges_timeline_object_set_layer (object, NULL);
/* Remove it from our list of controlled objects */
layer->priv->objects_start =
g_list_remove (layer->priv->objects_start, object);
/* Remove our reference to the object */
g_object_unref (object);
return TRUE;
}
/**
* ges_timeline_layer_resync_priorities:
* @layer: a #GESTimelineLayer
*
* Resyncs the priorities of the objects controlled by @layer.
* This method
*/
gboolean
ges_timeline_layer_resync_priorities (GESTimelineLayer * layer)
{
GList *tmp;
GESTimelineObject *obj;
GST_DEBUG ("Resync priorities of %p", layer);
/* TODO : Inhibit composition updates while doing this.
* Ideally we want to do it from an even higher level, but here will
* do in the meantime. */
for (tmp = layer->priv->objects_start; tmp; tmp = tmp->next) {
obj = GES_TIMELINE_OBJECT (tmp->data);
ges_timeline_object_set_priority (obj, GES_TIMELINE_OBJECT_PRIORITY (obj));
}
return TRUE;
}
/**
* ges_timeline_layer_set_priority:
* @layer: a #GESTimelineLayer
* @priority: the priority to set
*
* Sets the layer to the given @priority. See the documentation of the
* priority property for more information.
*/
void
ges_timeline_layer_set_priority (GESTimelineLayer * layer, guint priority)
{
g_return_if_fail (GES_IS_TIMELINE_LAYER (layer));
GST_DEBUG ("layer:%p, priority:%d", layer, priority);
if (priority != layer->priv->priority) {
layer->priv->priority = priority;
layer->min_gnl_priority = (priority * LAYER_HEIGHT);
layer->max_gnl_priority = ((priority + 1) * LAYER_HEIGHT) - 1;
ges_timeline_layer_resync_priorities (layer);
}
}
/**
* ges_timeline_layer_get_auto_transition:
* @layer: a #GESTimelineLayer
*
* Gets whether transitions are automatically added when objects
* overlap or not.
*
* Returns: %TRUE if transitions are automatically added, else %FALSE.
*/
gboolean
ges_timeline_layer_get_auto_transition (GESTimelineLayer * layer)
{
g_return_val_if_fail (GES_IS_TIMELINE_LAYER (layer), 0);
return layer->priv->auto_transition;
}
/**
* ges_timeline_layer_set_auto_transition:
* @layer: a #GESTimelineLayer
* @auto_transition: whether the auto_transition is active
*
* Sets the layer to the given @auto_transition. See the documentation of the
* property auto_transition for more information.
*/
void
ges_timeline_layer_set_auto_transition (GESTimelineLayer * layer,
gboolean auto_transition)
{
GList *tmp;
g_return_if_fail (GES_IS_TIMELINE_LAYER (layer));
if (auto_transition) {
for (tmp = layer->priv->objects_start; tmp; tmp = tmp->next) {
if (GES_IS_TIMELINE_SOURCE (tmp->data)) {
g_signal_connect (G_OBJECT (tmp->data), "track-object-added",
G_CALLBACK (track_object_added_cb), layer);
g_signal_connect (G_OBJECT (tmp->data), "track-object-removed",
G_CALLBACK (track_object_removed_cb), layer);
}
}
/* FIXME calculate all the transitions at that time */
}
layer->priv->auto_transition = auto_transition;
}
/**
* ges_timeline_layer_get_priority:
* @layer: a #GESTimelineLayer
*
* Get the priority of @layer within the timeline.
*
* Returns: The priority of the @layer within the timeline.
*/
guint
ges_timeline_layer_get_priority (GESTimelineLayer * layer)
{
g_return_val_if_fail (GES_IS_TIMELINE_LAYER (layer), 0);
return layer->priv->priority;
}
/**
* ges_timeline_layer_get_objects:
* @layer: a #GESTimelineLayer
*
* Get the timeline objects this layer contains.
*
* Returns: (transfer full) (element-type GESTimelineObject): a #GList of
* timeline objects. The user is responsible for
* unreffing the contained objects and freeing the list.
*/
GList *
ges_timeline_layer_get_objects (GESTimelineLayer * layer)
{
GList *ret = NULL;
GList *tmp;
GESTimelineLayerClass *klass;
g_return_val_if_fail (GES_IS_TIMELINE_LAYER (layer), NULL);
klass = GES_TIMELINE_LAYER_GET_CLASS (layer);
if (klass->get_objects) {
return klass->get_objects (layer);
}
for (tmp = layer->priv->objects_start; tmp; tmp = tmp->next) {
ret = g_list_prepend (ret, tmp->data);
g_object_ref (tmp->data);
}
ret = g_list_reverse (ret);
return ret;
}
/**
* ges_timeline_layer_is_empty:
* @layer: The #GESTimelineLayer to check
*
* Convenience method to check if @layer is empty (doesn't contain any object),
* or not.
*
* Returns: %TRUE if @layer is empty, %FALSE if it already contains at least
* one #GESTimelineObject
*/
gboolean
ges_timeline_layer_is_empty (GESTimelineLayer * layer)
{
g_return_val_if_fail (GES_IS_TIMELINE_LAYER (layer), FALSE);
return (layer->priv->objects_start == NULL);
}