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gstreamer/ges/ges-group.c
Thibault Saunier ffc11daa40 ges: Use assets to instantiate track elements/group 
And deprecate all GESTrackElement constructors, but the GESEffect one.
Those should **never** be created by users and should become internal
in the future.

Stop having docstring for the constructors that were internal.
2020-03-27 17:17:23 -03:00

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/* GStreamer Editing Services
* Copyright (C) 2013 Thibault Saunier <thibault.saunier@collabora.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gesgroup
* @title: GESGroup
* @short_description: Class for a collection of #GESContainer-s within
* a single timeline.
*
* A #GESGroup controls one or more #GESContainer-s (usually #GESClip-s,
* but it can also control other #GESGroup-s). Its children must share
* the same #GESTimeline, but can otherwise lie in separate #GESLayer-s
* and have different timings.
*
* To initialise a group, you may want to use ges_container_group(),
* and similarly use ges_container_ungroup() to dispose of it.
*
* A group will maintain the relative #GESTimelineElement:start times of
* its children, as well as their relative layer #GESLayer:priority.
* Therefore, if one of its children has its #GESTimelineElement:start
* set, all other children will have their #GESTimelineElement:start
* shifted by the same amount. Similarly, if one of its children moves to
* a new layer, the other children will also change layers to maintain the
* difference in their layer priorities. For example, if a child moves
* from a layer with #GESLayer:priority 1 to a layer with priority 3, then
* another child that was in a layer with priority 0 will move to the
* layer with priority 2.
*
* The #GESGroup:start of a group refers to the earliest start
* time of its children. If the group's #GESGroup:start is set, all the
* children will be shifted equally such that the earliest start time
* will match the set value. The #GESGroup:duration of a group is the
* difference between the earliest start time and latest end time of its
* children. If the group's #GESGroup:duration is increased, the children
* whose end time matches the end of the group will be extended
* accordingly. If it is decreased, then any child whose end time exceeds
* the new end time will also have their duration decreased accordingly.
*
* A group may span several layers, but for methods such as
* ges_timeline_element_get_layer_priority() and
* ges_timeline_element_edit() a group is considered to have a layer
* priority that is the highest #GESLayer:priority (numerically, the
* smallest) of all the layers it spans.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-group.h"
#include "ges.h"
#include "ges-internal.h"
#include <string.h>
#define parent_class ges_group_parent_class
#define GES_CHILDREN_INIBIT_SIGNAL_EMISSION (GES_CHILDREN_LAST + 1)
#define GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT "ges-group-signals-ids-%p"
struct _GESGroupPrivate
{
gboolean reseting_start;
guint32 max_layer_prio;
/* This is used while were are setting ourselve a proper timing value,
* in this case the value should always be kept */
gboolean setting_value;
};
typedef struct
{
GESLayer *layer;
gulong child_clip_changed_layer_sid;
gulong child_priority_changed_sid;
gulong child_group_priority_changed_sid;
} ChildSignalIds;
enum
{
PROP_0,
PROP_START,
PROP_INPOINT,
PROP_DURATION,
PROP_MAX_DURATION,
PROP_PRIORITY,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST] = { NULL, };
G_DEFINE_TYPE_WITH_PRIVATE (GESGroup, ges_group, GES_TYPE_CONTAINER);
/****************************************************
* Our listening of children *
****************************************************/
static void
_update_our_values (GESGroup * group)
{
GList *tmp;
GESContainer *container = GES_CONTAINER (group);
guint32 min_layer_prio = G_MAXINT32, max_layer_prio = 0;
for (tmp = GES_CONTAINER_CHILDREN (group); tmp; tmp = tmp->next) {
GESContainer *child = tmp->data;
if (GES_IS_CLIP (child)) {
GESLayer *layer = ges_clip_get_layer (GES_CLIP (child));
gint32 prio;
if (!layer)
continue;
prio = ges_layer_get_priority (layer);
min_layer_prio = MIN (prio, min_layer_prio);
max_layer_prio = MAX (prio, max_layer_prio);
} else if (GES_IS_GROUP (child)) {
gint32 prio = _PRIORITY (child), height = GES_CONTAINER_HEIGHT (child);
min_layer_prio = MIN (prio, min_layer_prio);
max_layer_prio = MAX ((prio + height - 1), max_layer_prio);
}
}
if (min_layer_prio != _PRIORITY (group)) {
group->priv->setting_value = TRUE;
_set_priority0 (GES_TIMELINE_ELEMENT (group), min_layer_prio);
group->priv->setting_value = FALSE;
for (tmp = GES_CONTAINER_CHILDREN (group); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
guint32 child_prio = GES_IS_CLIP (child) ?
GES_TIMELINE_ELEMENT_LAYER_PRIORITY (child) : _PRIORITY (child);
_ges_container_set_priority_offset (container,
child, min_layer_prio - child_prio);
}
}
/* FIXME: max_layer_prio not used elsewhere
* We could use it to inform our parent group when our maximum has
* changed (which we don't currently do, to allow it to change its
* height) */
group->priv->max_layer_prio = max_layer_prio;
_ges_container_set_height (GES_CONTAINER (group),
max_layer_prio - min_layer_prio + 1);
}
static void
_child_priority_changed_cb (GESLayer * layer,
GParamSpec * arg G_GNUC_UNUSED, GESTimelineElement * clip)
{
GESContainer *container = GES_CONTAINER (GES_TIMELINE_ELEMENT_PARENT (clip));
gint layer_prio = ges_layer_get_priority (layer);
gint offset = _ges_container_get_priority_offset (container, clip);
if (container->children_control_mode != GES_CHILDREN_UPDATE) {
GST_DEBUG_OBJECT (container, "Ignoring updated");
return;
}
if (layer_prio + offset == _PRIORITY (container))
return;
/* FIXME: we shouldn't be moving our children to a new layer when a
* layer changes its priority in a timeline */
container->initiated_move = clip;
_set_priority0 (GES_TIMELINE_ELEMENT (container), layer_prio + offset);
container->initiated_move = NULL;
}
static void
_child_clip_changed_layer_cb (GESTimelineElement * clip,
GParamSpec * arg G_GNUC_UNUSED, GESGroup * group)
{
ChildSignalIds *sigids;
gchar *signals_ids_key;
GESLayer *old_layer, *new_layer;
gint offset, layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (clip);
GESContainer *container = GES_CONTAINER (group);
offset = _ges_container_get_priority_offset (container, clip);
signals_ids_key =
g_strdup_printf (GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT, clip);
sigids = g_object_get_data (G_OBJECT (group), signals_ids_key);
g_free (signals_ids_key);
old_layer = sigids->layer;
new_layer = ges_clip_get_layer (GES_CLIP (clip));
if (sigids->child_priority_changed_sid) {
g_signal_handler_disconnect (old_layer, sigids->child_priority_changed_sid);
sigids->child_priority_changed_sid = 0;
}
if (new_layer) {
sigids->child_priority_changed_sid =
g_signal_connect (new_layer, "notify::priority",
(GCallback) _child_priority_changed_cb, clip);
}
/* sigids takes ownership of new_layer, we take ownership of old_layer */
sigids->layer = new_layer;
if (container->children_control_mode != GES_CHILDREN_UPDATE) {
if (container->children_control_mode == GES_CHILDREN_INIBIT_SIGNAL_EMISSION) {
container->children_control_mode = GES_CHILDREN_UPDATE;
g_signal_stop_emission_by_name (clip, "notify::layer");
}
gst_clear_object (&old_layer);
return;
}
if (new_layer && old_layer && (layer_prio + offset < 0 ||
(GES_TIMELINE_ELEMENT_TIMELINE (group) &&
layer_prio + offset + GES_CONTAINER_HEIGHT (group) - 1 >
g_list_length (GES_TIMELINE_ELEMENT_TIMELINE (group)->layers)))) {
GST_INFO_OBJECT (container,
"Trying to move to a layer %" GST_PTR_FORMAT " outside of"
"the timeline layers, moving back to old layer (prio %i)", new_layer,
_PRIORITY (group) - offset);
container->children_control_mode = GES_CHILDREN_INIBIT_SIGNAL_EMISSION;
ges_clip_move_to_layer (GES_CLIP (clip), old_layer);
g_signal_stop_emission_by_name (clip, "notify::layer");
gst_clear_object (&old_layer);
return;
}
if (!new_layer || !old_layer) {
_update_our_values (group);
gst_clear_object (&old_layer);
return;
}
container->initiated_move = clip;
_set_priority0 (GES_TIMELINE_ELEMENT (group), layer_prio + offset);
container->initiated_move = NULL;
gst_clear_object (&old_layer);
}
static void
_child_group_priority_changed (GESTimelineElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESGroup * group)
{
gint offset;
GESContainer *container = GES_CONTAINER (group);
if (container->children_control_mode != GES_CHILDREN_UPDATE) {
GST_DEBUG_OBJECT (group, "Ignoring updated");
return;
}
offset = _ges_container_get_priority_offset (container, child);
if (_PRIORITY (group) < offset ||
(GES_TIMELINE_ELEMENT_TIMELINE (group) &&
_PRIORITY (group) + offset + GES_CONTAINER_HEIGHT (group) >
g_list_length (GES_TIMELINE_ELEMENT_TIMELINE (group)->layers))) {
GST_WARNING_OBJECT (container, "Trying to move to a layer outside of"
"the timeline layers");
return;
}
container->initiated_move = child;
_set_priority0 (GES_TIMELINE_ELEMENT (group), _PRIORITY (child) + offset);
container->initiated_move = NULL;
}
/****************************************************
* GESTimelineElement vmethods *
****************************************************/
static gboolean
_trim (GESTimelineElement * group, GstClockTime start)
{
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (group);
if (timeline == NULL) {
GST_DEBUG ("Not in a timeline yet");
return FALSE;
}
return timeline_tree_trim (timeline_get_tree (timeline), group,
0, GST_CLOCK_DIFF (start, _START (group)), GES_EDGE_START,
ges_timeline_get_snapping_distance (timeline));
}
static gboolean
_set_priority (GESTimelineElement * element, guint32 priority)
{
GList *tmp, *layers;
gint diff = priority - _PRIORITY (element);
GESContainer *container = GES_CONTAINER (element);
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (element);
if (GES_GROUP (element)->priv->setting_value == TRUE)
return TRUE;
container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
layers = GES_TIMELINE_ELEMENT_TIMELINE (element) ?
GES_TIMELINE_ELEMENT_TIMELINE (element)->layers : NULL;
if (layers == NULL) {
GST_WARNING_OBJECT (element, "Not any layer in the timeline, not doing"
"anything, timeline: %" GST_PTR_FORMAT,
GES_TIMELINE_ELEMENT_TIMELINE (element));
return FALSE;
}
/* FIXME: why are we not shifting ->max_layer_prio? */
for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (child != container->initiated_move
|| ELEMENT_FLAG_IS_SET (container, GES_TIMELINE_ELEMENT_SET_SIMPLE)) {
if (GES_IS_CLIP (child)) {
guint32 layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (child) + diff;
GESLayer *layer =
g_list_nth_data (GES_TIMELINE_GET_LAYERS (timeline), layer_prio);
if (layer == NULL) {
do {
layer = ges_timeline_append_layer (timeline);
} while (ges_layer_get_priority (layer) < layer_prio);
}
GST_DEBUG ("%" GES_FORMAT "moving from layer: %i to %i",
GES_ARGS (child), GES_TIMELINE_ELEMENT_LAYER_PRIORITY (child),
layer_prio);
ges_clip_move_to_layer (GES_CLIP (child), g_list_nth_data (layers,
layer_prio));
} else if (GES_IS_GROUP (child)) {
GST_DEBUG_OBJECT (child, "moving from %i to %i",
_PRIORITY (child), diff + _PRIORITY (child));
ges_timeline_element_set_priority (child, diff + _PRIORITY (child));
}
}
}
container->children_control_mode = GES_CHILDREN_UPDATE;
return TRUE;
}
static gboolean
_set_start (GESTimelineElement * element, GstClockTime start)
{
GList *tmp, *children;
gint64 diff = start - _START (element);
GESTimeline *timeline;
GESContainer *container = GES_CONTAINER (element);
GESTimelineElement *toplevel =
ges_timeline_element_get_toplevel_parent (element);
gst_object_unref (toplevel);
if (GES_GROUP (element)->priv->setting_value == TRUE)
/* Let GESContainer update itself */
return GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_start (element,
start);
if (ELEMENT_FLAG_IS_SET (element, GES_TIMELINE_ELEMENT_SET_SIMPLE) ||
ELEMENT_FLAG_IS_SET (toplevel, GES_TIMELINE_ELEMENT_SET_SIMPLE)) {
/* get copy of children, since GESContainer may resort the group */
children = ges_container_get_children (container, FALSE);
container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
for (tmp = children; tmp; tmp = tmp->next)
_set_start0 (tmp->data, _START (tmp->data) + diff);
container->children_control_mode = GES_CHILDREN_UPDATE;
g_list_free_full (children, gst_object_unref);
return TRUE;
}
timeline = GES_TIMELINE_ELEMENT_TIMELINE (element);
if (timeline)
return ges_timeline_move_object_simple (timeline, element, NULL,
GES_EDGE_NONE, start);
return TRUE;
}
static gboolean
_set_inpoint (GESTimelineElement * element, GstClockTime inpoint)
{
if (inpoint != 0) {
GST_WARNING_OBJECT (element, "The in-point of a group has no meaning,"
" it can not be set to a non-zero value");
return FALSE;
}
return TRUE;
}
static gboolean
_set_max_duration (GESTimelineElement * element, GstClockTime max_duration)
{
if (GST_CLOCK_TIME_IS_VALID (max_duration)) {
GST_WARNING_OBJECT (element, "The max-duration of a group has no "
"meaning, it can not be set to a valid GstClockTime value");
return FALSE;
}
return TRUE;
}
static gboolean
_set_duration (GESTimelineElement * element, GstClockTime duration)
{
GList *tmp, *children;
GstClockTime last_child_end = 0, new_end;
GESContainer *container = GES_CONTAINER (element);
GESGroupPrivate *priv = GES_GROUP (element)->priv;
if (priv->setting_value == TRUE)
/* Let GESContainer update itself */
return GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_duration (element,
duration);
if (element->timeline
&& !timeline_tree_can_move_element (timeline_get_tree (element->timeline),
element, _PRIORITY (element), element->start, duration, NULL)) {
return FALSE;
}
if (container->initiated_move == NULL) {
gboolean expending = (_DURATION (element) < duration);
new_end = _START (element) + duration;
/* get copy of children, since GESContainer may resort the group */
children = ges_container_get_children (container, FALSE);
container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
for (tmp = children; tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
GstClockTime n_dur;
if ((!expending && _END (child) > new_end) ||
(expending && (_END (child) >= _END (element)))) {
n_dur = MAX (0, ((gint64) (new_end - _START (child))));
_set_duration0 (child, n_dur);
}
}
container->children_control_mode = GES_CHILDREN_UPDATE;
g_list_free_full (children, gst_object_unref);
}
for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
if (_DURATION (tmp->data))
last_child_end =
MAX (GES_TIMELINE_ELEMENT_END (tmp->data), last_child_end);
}
priv->setting_value = TRUE;
_set_duration0 (element, last_child_end - _START (element));
priv->setting_value = FALSE;
return -1;
}
/****************************************************
* *
* GESContainer virtual methods implementation *
* *
****************************************************/
static gboolean
_add_child (GESContainer * group, GESTimelineElement * child)
{
g_return_val_if_fail (GES_IS_CONTAINER (child), FALSE);
return TRUE;
}
static void
_child_added (GESContainer * group, GESTimelineElement * child)
{
GList *children, *tmp;
gchar *signals_ids_key;
ChildSignalIds *signals_ids;
GESGroupPrivate *priv = GES_GROUP (group)->priv;
GstClockTime last_child_end = 0, first_child_start = G_MAXUINT64;
/* NOTE: notifies are currently frozen by ges_container_add */
if (!GES_TIMELINE_ELEMENT_TIMELINE (group)
&& GES_TIMELINE_ELEMENT_TIMELINE (child)) {
timeline_add_group (GES_TIMELINE_ELEMENT_TIMELINE (child),
GES_GROUP (group));
timeline_emit_group_added (GES_TIMELINE_ELEMENT_TIMELINE (child),
GES_GROUP (group));
}
/* FIXME: we should otherwise check that the child is part of the same
* timeline */
children = GES_CONTAINER_CHILDREN (group);
for (tmp = children; tmp; tmp = tmp->next) {
last_child_end = MAX (GES_TIMELINE_ELEMENT_END (tmp->data), last_child_end);
first_child_start =
MIN (GES_TIMELINE_ELEMENT_START (tmp->data), first_child_start);
}
priv->setting_value = TRUE;
ELEMENT_SET_FLAG (group, GES_TIMELINE_ELEMENT_SET_SIMPLE);
if (first_child_start != GES_TIMELINE_ELEMENT_START (group)) {
_set_start0 (GES_TIMELINE_ELEMENT (group), first_child_start);
}
if (last_child_end != GES_TIMELINE_ELEMENT_END (group)) {
_set_duration0 (GES_TIMELINE_ELEMENT (group),
last_child_end - first_child_start);
}
ELEMENT_UNSET_FLAG (group, GES_TIMELINE_ELEMENT_SET_SIMPLE);
priv->setting_value = FALSE;
_update_our_values (GES_GROUP (group));
signals_ids_key =
g_strdup_printf (GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT, child);
signals_ids = g_malloc0 (sizeof (ChildSignalIds));
g_object_set_data_full (G_OBJECT (group), signals_ids_key,
signals_ids, g_free);
g_free (signals_ids_key);
if (GES_IS_CLIP (child)) {
GESLayer *layer = ges_clip_get_layer (GES_CLIP (child));
signals_ids->child_clip_changed_layer_sid =
g_signal_connect (child, "notify::layer",
(GCallback) _child_clip_changed_layer_cb, group);
if (layer) {
signals_ids->child_priority_changed_sid = g_signal_connect (layer,
"notify::priority", (GCallback) _child_priority_changed_cb, child);
}
signals_ids->layer = layer;
} else if (GES_IS_GROUP (child), group) {
signals_ids->child_group_priority_changed_sid =
g_signal_connect (child, "notify::priority",
(GCallback) _child_group_priority_changed, group);
}
}
static void
_disconnect_signals (GESGroup * group, GESTimelineElement * child,
ChildSignalIds * sigids)
{
if (sigids->child_group_priority_changed_sid) {
g_signal_handler_disconnect (child,
sigids->child_group_priority_changed_sid);
sigids->child_group_priority_changed_sid = 0;
}
if (sigids->child_clip_changed_layer_sid) {
g_signal_handler_disconnect (child, sigids->child_clip_changed_layer_sid);
sigids->child_clip_changed_layer_sid = 0;
}
if (sigids->child_priority_changed_sid) {
g_signal_handler_disconnect (sigids->layer,
sigids->child_priority_changed_sid);
sigids->child_priority_changed_sid = 0;
}
gst_clear_object (&(sigids->layer));
}
static void
_child_removed (GESContainer * group, GESTimelineElement * child)
{
GList *children, *tmp;
GstClockTime first_child_start;
gchar *signals_ids_key;
ChildSignalIds *sigids;
guint32 new_priority = G_MAXUINT32;
GESGroupPrivate *priv = GES_GROUP (group)->priv;
/* NOTE: notifies are currently frozen by ges_container_add */
_ges_container_sort_children (group);
children = GES_CONTAINER_CHILDREN (group);
signals_ids_key =
g_strdup_printf (GES_GROUP_SIGNALS_IDS_DATA_KEY_FORMAT, child);
sigids = g_object_get_data (G_OBJECT (group), signals_ids_key);
_disconnect_signals (GES_GROUP (group), child, sigids);
g_free (signals_ids_key);
if (children == NULL) {
GST_FIXME_OBJECT (group, "Auto destroy myself?");
if (GES_TIMELINE_ELEMENT_TIMELINE (group))
timeline_remove_group (GES_TIMELINE_ELEMENT_TIMELINE (group),
GES_GROUP (group));
return;
}
for (tmp = children; tmp; tmp = tmp->next)
new_priority =
MIN (new_priority, ges_timeline_element_get_priority (tmp->data));
priv->setting_value = TRUE;
ELEMENT_SET_FLAG (group, GES_TIMELINE_ELEMENT_SET_SIMPLE);
if (_PRIORITY (group) != new_priority)
ges_timeline_element_set_priority (GES_TIMELINE_ELEMENT (group),
new_priority);
first_child_start = GES_TIMELINE_ELEMENT_START (children->data);
if (first_child_start > GES_TIMELINE_ELEMENT_START (group)) {
_set_start0 (GES_TIMELINE_ELEMENT (group), first_child_start);
}
ELEMENT_UNSET_FLAG (group, GES_TIMELINE_ELEMENT_SET_SIMPLE);
priv->setting_value = FALSE;
}
static GList *
_ungroup (GESContainer * group, gboolean recursive)
{
GPtrArray *children_array;
GESTimeline *timeline;
GList *children, *tmp, *ret = NULL;
/* We choose 16 just as an arbitrary value */
children_array = g_ptr_array_sized_new (16);
timeline = GES_TIMELINE_ELEMENT_TIMELINE (group);
children = ges_container_get_children (group, FALSE);
for (tmp = children; tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
gst_object_ref (child);
ges_container_remove (group, child);
g_ptr_array_add (children_array, child);
ret = g_list_append (ret, child);
}
if (timeline)
timeline_emit_group_removed (timeline, (GESGroup *) group, children_array);
g_ptr_array_free (children_array, TRUE);
g_list_free_full (children, gst_object_unref);
/* No need to remove from the timeline here, this will be done in _child_removed */
return ret;
}
static GESContainer *
_group (GList * containers)
{
GList *tmp;
GESTimeline *timeline = NULL;
GESContainer *ret = g_object_new (GES_TYPE_GROUP, NULL);
if (!containers)
return ret;
for (tmp = containers; tmp; tmp = tmp->next) {
if (!timeline) {
timeline = GES_TIMELINE_ELEMENT_TIMELINE (tmp->data);
} else if (timeline != GES_TIMELINE_ELEMENT_TIMELINE (tmp->data)) {
g_object_unref (ret);
return NULL;
}
ges_container_add (ret, tmp->data);
}
/* No need to add to the timeline here, this will be done in _child_added */
return ret;
}
static GESTimelineElement *
_paste (GESTimelineElement * element, GESTimelineElement * ref,
GstClockTime paste_position)
{
GESTimelineElement *ngroup =
GES_TIMELINE_ELEMENT_CLASS (parent_class)->paste (element, ref,
paste_position);
if (ngroup) {
if (GES_CONTAINER_CHILDREN (ngroup)) {
timeline_add_group (GES_TIMELINE_ELEMENT_TIMELINE (GES_CONTAINER_CHILDREN
(ngroup)->data), GES_GROUP (element));
timeline_emit_group_added (GES_TIMELINE_ELEMENT_TIMELINE
(GES_CONTAINER_CHILDREN (ngroup)->data), GES_GROUP (element));
}
}
return ngroup;
}
/****************************************************
* *
* GObject virtual methods implementation *
* *
****************************************************/
static void
ges_group_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTimelineElement *self = GES_TIMELINE_ELEMENT (object);
switch (property_id) {
case PROP_START:
g_value_set_uint64 (value, self->start);
break;
case PROP_INPOINT:
g_value_set_uint64 (value, self->inpoint);
break;
case PROP_DURATION:
g_value_set_uint64 (value, self->duration);
break;
case PROP_MAX_DURATION:
g_value_set_uint64 (value, self->maxduration);
break;
case PROP_PRIORITY:
g_value_set_uint (value, self->priority);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec);
}
}
static void
ges_group_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTimelineElement *self = GES_TIMELINE_ELEMENT (object);
switch (property_id) {
case PROP_START:
ges_timeline_element_set_start (self, g_value_get_uint64 (value));
break;
case PROP_INPOINT:
ges_timeline_element_set_inpoint (self, g_value_get_uint64 (value));
break;
case PROP_DURATION:
ges_timeline_element_set_duration (self, g_value_get_uint64 (value));
break;
case PROP_PRIORITY:
ges_timeline_element_set_priority (self, g_value_get_uint (value));
break;
case PROP_MAX_DURATION:
ges_timeline_element_set_max_duration (self, g_value_get_uint64 (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec);
}
}
static void
ges_group_class_init (GESGroupClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESContainerClass *container_class = GES_CONTAINER_CLASS (klass);
GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
object_class->get_property = ges_group_get_property;
object_class->set_property = ges_group_set_property;
element_class->trim = _trim;
element_class->set_duration = _set_duration;
element_class->set_inpoint = _set_inpoint;
element_class->set_max_duration = _set_max_duration;
element_class->set_start = _set_start;
element_class->set_priority = _set_priority;
element_class->paste = _paste;
/* We override start, inpoint, duration and max-duration from GESTimelineElement
* in order to makes sure those fields are not serialized.
*/
/**
* GESGroup:start:
*
* An overwrite of the #GESTimelineElement:start property. For a
* #GESGroup, this is the earliest #GESTimelineElement:start time
* amongst its children.
*/
properties[PROP_START] = g_param_spec_uint64 ("start", "Start",
"The position in the container", 0, G_MAXUINT64, 0,
G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION);
/**
* GESGroup:in-point:
*
* An overwrite of the #GESTimelineElement:in-point property. This has
* no meaning for a group and should not be set.
*/
properties[PROP_INPOINT] =
g_param_spec_uint64 ("in-point", "In-point", "The in-point", 0,
G_MAXUINT64, 0, G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION);
/**
* GESGroup:duration:
*
* An overwrite of the #GESTimelineElement:duration property. For a
* #GESGroup, this is the difference between the earliest
* #GESTimelineElement:start time and the latest end time (given by
* #GESTimelineElement:start + #GESTimelineElement:duration) amongst
* its children.
*/
properties[PROP_DURATION] =
g_param_spec_uint64 ("duration", "Duration", "The duration to use", 0,
G_MAXUINT64, GST_CLOCK_TIME_NONE,
G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION);
/**
* GESGroup:max-duration:
*
* An overwrite of the #GESTimelineElement:max-duration property. This
* has no meaning for a group and should not be set.
*/
properties[PROP_MAX_DURATION] =
g_param_spec_uint64 ("max-duration", "Maximum duration",
"The maximum duration of the object", 0, G_MAXUINT64, GST_CLOCK_TIME_NONE,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | GES_PARAM_NO_SERIALIZATION);
/**
* GESGroup:priority:
*
* An overwrite of the #GESTimelineElement:priority property.
* Setting #GESTimelineElement priorities is deprecated as all priority
* management is now done by GES itself.
*/
properties[PROP_PRIORITY] = g_param_spec_uint ("priority", "Priority",
"The priority of the object", 0, G_MAXUINT, 0,
G_PARAM_READWRITE | GES_PARAM_NO_SERIALIZATION);
g_object_class_install_properties (object_class, PROP_LAST, properties);
container_class->add_child = _add_child;
container_class->child_added = _child_added;
container_class->child_removed = _child_removed;
container_class->ungroup = _ungroup;
container_class->group = _group;
container_class->grouping_priority = 0;
}
static void
ges_group_init (GESGroup * self)
{
self->priv = ges_group_get_instance_private (self);
self->priv->setting_value = FALSE;
}
/****************************************************
* *
* API implementation *
* *
****************************************************/
/**
* ges_group_new:
*
* Created a new empty group. You may wish to use
* ges_container_group() instead, which can return a different
* #GESContainer subclass if possible.
*
* Returns: (transfer floating): The new empty group.
*/
GESGroup *
ges_group_new (void)
{
GESGroup *res;
GESAsset *asset = ges_asset_request (GES_TYPE_GROUP, NULL, NULL);
res = GES_GROUP (ges_asset_extract (asset, NULL));
gst_object_unref (asset);
return res;
}
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