gstreamer/ges/ges-timeline-element.c

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/* gst-editing-services
* Copyright (C) <2013> Thibault Saunier <thibault.saunier@collabora.com>
* <2013> Collabora Ltd.
*
* gst-editing-services is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gst-editing-services 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:gestimelineelement
* @short_description: Base Class for all elements that will be in a way or
* another inside a GESTimeline.
*
* The GESTimelineElement base class implements the notion of timing as well
* as priority. A GESTimelineElement can have a parent object which will be
* responsible for controlling its timing properties.
*/
#include "ges-timeline-element.h"
#include "ges-extractable.h"
#include "ges-meta-container.h"
#include "ges-internal.h"
#include <string.h>
/* maps type name quark => count */
static GData *object_name_counts = NULL;
static void
extractable_set_asset (GESExtractable * extractable, GESAsset * asset)
{
GES_TIMELINE_ELEMENT (extractable)->asset = asset;
}
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->set_asset = extractable_set_asset;
}
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GESTimelineElement, ges_timeline_element,
G_TYPE_INITIALLY_UNOWNED,
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init)
G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER, NULL));
enum
{
PROP_0,
PROP_PARENT,
PROP_TIMELINE,
PROP_START,
PROP_INPOINT,
PROP_DURATION,
PROP_MAX_DURATION,
PROP_PRIORITY,
PROP_NAME,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST] = { NULL, };
struct _GESTimelineElementPrivate
{
gpointer dummy;
};
static void
_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTimelineElement *self = GES_TIMELINE_ELEMENT (object);
switch (property_id) {
case PROP_PARENT:
g_value_take_object (value, self->parent);
break;
case PROP_TIMELINE:
g_value_take_object (value, self->timeline);
break;
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;
case PROP_NAME:
g_value_take_string (value, ges_timeline_element_get_name (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec);
}
}
static void
_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTimelineElement *self = GES_TIMELINE_ELEMENT (object);
switch (property_id) {
case PROP_PARENT:
ges_timeline_element_set_parent (self, g_value_get_object (value));
break;
case PROP_TIMELINE:
ges_timeline_element_set_timeline (self, g_value_get_object (value));
break;
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;
case PROP_NAME:
ges_timeline_element_set_name (self, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (self, property_id, pspec);
}
}
static void
ges_timeline_element_finalize (GObject * self)
{
GESTimelineElement *tle = GES_TIMELINE_ELEMENT (self);
g_free (tle->name);
G_OBJECT_CLASS (ges_timeline_element_parent_class)->finalize (self);
}
static void
ges_timeline_element_init (GESTimelineElement * ges_timeline_element)
{
}
static void
ges_timeline_element_class_init (GESTimelineElementClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->get_property = _get_property;
object_class->set_property = _set_property;
/**
* GESTimelineElement:parent:
*
* The parent container of the object
*/
properties[PROP_PARENT] =
g_param_spec_object ("parent", "Parent",
"The parent container of the object", GES_TYPE_TIMELINE_ELEMENT,
G_PARAM_READWRITE);
/**
* GESTimelineElement:timeline:
*
* The timeline in which @element is
*/
properties[PROP_TIMELINE] =
g_param_spec_object ("timeline", "Timeline",
"The timeline the object is in", GES_TYPE_TIMELINE, G_PARAM_READWRITE);
/**
* GESTimelineElement:start:
*
* The position of the object in its container (in nanoseconds).
*/
properties[PROP_START] = g_param_spec_uint64 ("start", "Start",
"The position in the container", 0, G_MAXUINT64, 0, G_PARAM_READWRITE);
/**
* GESTimelineElement:in-point:
*
* The in-point at which this #GESTimelineElement will start outputting data
* from its contents (in nanoseconds).
*
* Ex : an in-point of 5 seconds means that the first outputted buffer will
* be the one located 5 seconds in the controlled resource.
*/
properties[PROP_INPOINT] =
g_param_spec_uint64 ("in-point", "In-point", "The in-point", 0,
G_MAXUINT64, 0, G_PARAM_READWRITE);
/**
* GESTimelineElement:duration:
*
* The duration (in nanoseconds) which will be used in the container
*/
properties[PROP_DURATION] =
g_param_spec_uint64 ("duration", "Duration", "The duration to use", 0,
G_MAXUINT64, GST_CLOCK_TIME_NONE, G_PARAM_READWRITE);
/**
* GESTimelineElement:max-duration:
*
* The maximum duration (in nanoseconds) of the #GESTimelineElement.
*/
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);
/**
* GESTimelineElement:priority:
*
* The priority of the object.
*/
properties[PROP_PRIORITY] = g_param_spec_uint ("priority", "Priority",
"The priority of the object", 0, G_MAXUINT, 0, G_PARAM_READWRITE);
/**
* GESTimelineElement:name:
*
* The name of the object
*/
properties[PROP_NAME] =
g_param_spec_string ("name", "Name", "The name of the timeline object",
NULL, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, PROP_LAST, properties);
object_class->finalize = ges_timeline_element_finalize;
klass->set_parent = NULL;
klass->set_start = NULL;
klass->set_inpoint = NULL;
klass->set_duration = NULL;
klass->set_max_duration = NULL;
klass->set_priority = NULL;
klass->ripple = NULL;
klass->ripple_end = NULL;
klass->roll_start = NULL;
klass->roll_end = NULL;
klass->trim = NULL;
}
static void
_set_name (GESTimelineElement * self, const gchar * wanted_name)
{
const gchar *type_name;
gchar *lowcase_type;
gint count;
GQuark q;
guint i, l;
gchar *name = NULL;
if (!object_name_counts) {
g_datalist_init (&object_name_counts);
}
q = g_type_qname (G_OBJECT_TYPE (self));
count = GPOINTER_TO_INT (g_datalist_id_get_data (&object_name_counts, q));
/* GstFooSink -> foosink<N> */
type_name = g_quark_to_string (q);
if (strncmp (type_name, "GES", 3) == 0)
type_name += 3;
lowcase_type = g_strdup (type_name);
l = strlen (lowcase_type);
for (i = 0; i < l; i++)
lowcase_type[i] = g_ascii_tolower (lowcase_type[i]);
if (wanted_name == NULL) {
/* give the 20th "uriclip" element and the first "uriclip2" (if needed in the future)
* different names */
l = strlen (type_name);
if (l > 0 && g_ascii_isdigit (type_name[l - 1])) {
name = g_strdup_printf ("%s-%d", lowcase_type, count++);
} else {
name = g_strdup_printf ("%s%d", lowcase_type, count++);
}
} else {
/* If the wanted name uses the same 'namespace' as default, make
* sure it does not badly interfere with our counting system */
if (g_str_has_prefix (wanted_name, lowcase_type)) {
guint64 tmpcount =
g_ascii_strtoull (&wanted_name[strlen (lowcase_type)], NULL, 10);
if (tmpcount > count) {
count = tmpcount + 1;
GST_DEBUG_OBJECT (self, "Using same naming %s but updated count to %i",
wanted_name, count);
} else if (tmpcount < count) {
name = g_strdup_printf ("%s%d", lowcase_type, count);
count++;
GST_DEBUG_OBJECT (self, "Name %s already allocated, giving: %s instead"
" New count is %i", wanted_name, name, count);
} else {
count++;
GST_DEBUG_OBJECT (self, "Perfect name, just bumping object count");
}
}
if (name == NULL)
name = g_strdup (wanted_name);
}
g_free (lowcase_type);
g_datalist_id_set_data (&object_name_counts, q, GINT_TO_POINTER (count));
g_free (self->name);
self->name = name;
}
/*********************************************
* API implementation *
*********************************************/
/**
* ges_timeline_element_set_parent:
* @self: a #GESTimelineElement
* @parent: new parent of self
*
* Sets the parent of @self to @parent. The object's reference count will
2013-03-22 01:17:10 +00:00
* be incremented, and any floating reference will be removed (see gst_object_ref_sink()).
*
* Returns: %TRUE if @parent could be set or %FALSE when @self
* already had a parent or @self and @parent are the same.
*/
gboolean
ges_timeline_element_set_parent (GESTimelineElement * self,
GESTimelineElement * parent)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
g_return_val_if_fail (parent == NULL
|| GES_IS_TIMELINE_ELEMENT (parent), FALSE);
if (self == parent) {
GST_INFO_OBJECT (self, "Trying to add %p in itself, not a good idea!",
self);
return FALSE;
}
GST_DEBUG_OBJECT (self, "set parent to %" GST_PTR_FORMAT, parent);
if (self->parent != NULL && parent != NULL)
goto had_parent;
if (GES_TIMELINE_ELEMENT_GET_CLASS (self)->set_parent) {
if (!GES_TIMELINE_ELEMENT_GET_CLASS (self)->set_parent (self, parent))
return FALSE;
}
self->parent = parent;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_PARENT]);
return TRUE;
/* ERROR handling */
had_parent:
{
GST_WARNING_OBJECT (self, "set parent failed, object already had a parent");
return FALSE;
}
}
/**
* ges_timeline_element_get_parent:
* @self: a #GESTimelineElement
*
* Returns the parent of @self. This function increases the refcount
* of the parent object so you should gst_object_unref() it after usage.
*
* Returns: (transfer full): parent of @self, this can be %NULL if @self
* has no parent. unref after usage.
*/
GESTimelineElement *
ges_timeline_element_get_parent (GESTimelineElement * self)
{
GESTimelineElement *result = NULL;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), NULL);
result = self->parent;
if (G_LIKELY (result))
gst_object_ref (result);
return result;
}
/**
* ges_timeline_element_set_timeline:
* @self: a #GESTimelineElement
* @timeline: The #GESTimeline @self is in
*
* Sets the timeline of @self to @timeline.
*
* Returns: %TRUE if @timeline could be set or %FALSE when @timeline
* already had a timeline.
*/
gboolean
ges_timeline_element_set_timeline (GESTimelineElement * self,
GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
g_return_val_if_fail (timeline == NULL || GES_IS_TIMELINE (timeline), FALSE);
GST_DEBUG_OBJECT (self, "set timeline to %" GST_PTR_FORMAT, timeline);
if (timeline != NULL && G_UNLIKELY (self->timeline != NULL))
goto had_timeline;
if (timeline == NULL) {
if (self->timeline) {
if (!timeline_remove_element (self->timeline, self)) {
GST_INFO_OBJECT (self, "Could not remove from"
" currently set timeline %" GST_PTR_FORMAT, self->timeline);
return FALSE;
}
}
} else {
if (!timeline_add_element (timeline, self)) {
GST_INFO_OBJECT (self, "Could not add to timeline %" GST_PTR_FORMAT,
self);
return FALSE;
}
}
self->timeline = timeline;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_TIMELINE]);
return TRUE;
/* ERROR handling */
had_timeline:
{
GST_DEBUG_OBJECT (self, "set timeline failed, object already had a "
"timeline");
return FALSE;
}
}
/**
* ges_timeline_element_get_timeline:
* @self: a #GESTimelineElement
*
* Returns the timeline of @self. This function increases the refcount
* of the timeline so you should gst_object_unref() it after usage.
*
* Returns: (transfer full): timeline of @self, this can be %NULL if @self
* has no timeline. unref after usage.
*/
GESTimeline *
ges_timeline_element_get_timeline (GESTimelineElement * self)
{
GESTimeline *result = NULL;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), NULL);
result = self->timeline;
if (G_LIKELY (result))
gst_object_ref (result);
return result;
}
/**
* ges_timeline_element_set_start:
* @self: a #GESTimelineElement
* @start: the position in #GstClockTime
*
* Set the position of the object in its containing layer
*
* Note that if the timeline snap-distance property of the timeline containing
* @self is set, @self will properly snap to its neighboors.
*/
void
ges_timeline_element_set_start (GESTimelineElement * self, GstClockTime start)
{
GESTimelineElementClass *klass;
GESTimelineElement *toplevel_container;
g_return_if_fail (GES_IS_TIMELINE_ELEMENT (self));
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "current start: %" GST_TIME_FORMAT
" new start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GES_TIMELINE_ELEMENT_START (self)), GST_TIME_ARGS (start));
toplevel_container = ges_timeline_element_get_toplevel_parent (self);
if (((gint64) (_START (toplevel_container) + start - _START (self))) < 0) {
GST_INFO_OBJECT (self, "Can not move the object as it would imply its"
"container to have a negative start value");
gst_object_unref (toplevel_container);
return;
}
gst_object_unref (toplevel_container);
if (klass->set_start) {
if (klass->set_start (self, start)) {
self->start = start;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_START]);
}
GST_DEBUG_OBJECT (self, "New start: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GES_TIMELINE_ELEMENT_START (self)));
return;
}
GST_WARNING_OBJECT (self, "No set_start virtual method implementation"
" on class %s. Can not set start %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (start));
}
/**
* ges_timeline_element_set_inpoint:
* @self: a #GESTimelineElement
* @inpoint: the in-point in #GstClockTime
*
* Set the in-point, that is the moment at which the @self will start
* outputting data from its contents.
*/
void
ges_timeline_element_set_inpoint (GESTimelineElement * self,
GstClockTime inpoint)
{
GESTimelineElementClass *klass;
g_return_if_fail (GES_IS_TIMELINE_ELEMENT (self));
GST_DEBUG_OBJECT (self, "current inpoint: %" GST_TIME_FORMAT
" new inpoint: %" GST_TIME_FORMAT, GST_TIME_ARGS (inpoint),
GST_TIME_ARGS (GES_TIMELINE_ELEMENT_INPOINT (self)));
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->set_inpoint) {
if (klass->set_inpoint (self, inpoint)) {
self->inpoint = inpoint;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_INPOINT]);
}
return;
}
GST_WARNING_OBJECT (self, "No set_inpoint virtual method implementation"
" on class %s. Can not set inpoint %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (inpoint));
}
/**
* ges_timeline_element_set_max_duration:
* @self: a #GESTimelineElement
* @maxduration: the maximum duration in #GstClockTime
*
* Set the maximun duration of the object
*/
void
ges_timeline_element_set_max_duration (GESTimelineElement * self,
GstClockTime maxduration)
{
GESTimelineElementClass *klass;
g_return_if_fail (GES_IS_TIMELINE_ELEMENT (self));
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "current duration: %" GST_TIME_FORMAT
" new duration: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GES_TIMELINE_ELEMENT_MAX_DURATION (self)),
GST_TIME_ARGS (maxduration));
if (klass->set_max_duration) {
if (klass->set_max_duration (self, maxduration) == FALSE)
return;
}
self->maxduration = maxduration;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_MAX_DURATION]);
}
/**
* ges_timeline_element_set_duration:
* @self: a #GESTimelineElement
* @duration: the duration in #GstClockTime
*
* Set the duration of the object
*
* Note that if the timeline snap-distance property of the timeline containing
* @self is set, @self will properly snap to its neighboors.
*/
void
ges_timeline_element_set_duration (GESTimelineElement * self,
GstClockTime duration)
{
GESTimelineElementClass *klass;
g_return_if_fail (GES_IS_TIMELINE_ELEMENT (self));
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "current duration: %" GST_TIME_FORMAT
" new duration: %" GST_TIME_FORMAT,
GST_TIME_ARGS (GES_TIMELINE_ELEMENT_DURATION (self)),
GST_TIME_ARGS (duration));
if (klass->set_duration) {
if (klass->set_duration (self, duration)) {
self->duration = duration;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_DURATION]);
}
return;
}
GST_WARNING_OBJECT (self, "No set_duration virtual method implementation"
" on class %s. Can not set duration %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (duration));
}
/**
* ges_timeline_element_get_start:
* @self: a #GESTimelineElement
*
* Returns: The @start of @self
*/
GstClockTime
ges_timeline_element_get_start (GESTimelineElement * self)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), GST_CLOCK_TIME_NONE);
return self->start;
}
/**
* ges_timeline_element_get_inpoint:
* @self: a #GESTimelineElement
*
* Returns: The @inpoint of @self
*/
GstClockTime
ges_timeline_element_get_inpoint (GESTimelineElement * self)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), GST_CLOCK_TIME_NONE);
return self->inpoint;
}
/**
* ges_timeline_element_get_duration:
* @self: a #GESTimelineElement
*
* Returns: The @duration of @self
*/
GstClockTime
ges_timeline_element_get_duration (GESTimelineElement * self)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), GST_CLOCK_TIME_NONE);
return self->duration;
}
/**
* ges_timeline_element_get_max_duration:
* @self: a #GESTimelineElement
*
* Returns: The @maxduration of @self
*/
GstClockTime
ges_timeline_element_get_max_duration (GESTimelineElement * self)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), GST_CLOCK_TIME_NONE);
return self->maxduration;
}
/**
* ges_timeline_element_get_priority:
* @self: a #GESTimelineElement
*
* Returns: The @priority of @self
*/
guint32
ges_timeline_element_get_priority (GESTimelineElement * self)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), 0);
return self->priority;
}
/**
* ges_timeline_element_set_priority:
* @self: a #GESTimelineElement
* @priority: the priority
*
* Sets the priority of the object within the containing layer
*/
void
ges_timeline_element_set_priority (GESTimelineElement * self, guint32 priority)
{
GESTimelineElementClass *klass;
g_return_if_fail (GES_IS_TIMELINE_ELEMENT (self));
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
GST_DEBUG_OBJECT (self, "current priority: %d new priority: %d",
self->priority, priority);
if (klass->set_priority) {
if (klass->set_priority (self, priority)) {
self->priority = priority;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_PRIORITY]);
}
return;
}
GST_WARNING_OBJECT (self, "No set_priority virtual method implementation"
" on class %s. Can not set priority %d", G_OBJECT_CLASS_NAME (klass),
priority);
}
/**
* ges_timeline_element_ripple:
* @self: The #GESTimelineElement to ripple.
* @start: The new start of @self in ripple mode.
*
* Edits @self in ripple mode. It allows you to modify the
* start of @self and move the following neighbours accordingly.
* This will change the overall timeline duration.
*
* Returns: %TRUE if the self as been rippled properly, %FALSE if an error
* occured
*/
gboolean
ges_timeline_element_ripple (GESTimelineElement * self, GstClockTime start)
{
GESTimelineElementClass *klass;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->ripple)
return klass->ripple (self, start);
GST_WARNING_OBJECT (self, "No ripple virtual method implementation"
" on class %s. Can not ripple to %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (start));
return FALSE;
}
/**
* ges_timeline_element_ripple_end:
* @self: The #GESTimelineElement to ripple.
* @end: The new end (start + duration) of @self in ripple mode. It will
* basically only change the duration of @self.
*
* Edits @self in ripple mode. It allows you to modify the
* duration of a @self and move the following neighbours accordingly.
* This will change the overall timeline duration.
*
* Returns: %TRUE if the self as been rippled properly, %FALSE if an error
* occured
*/
gboolean
ges_timeline_element_ripple_end (GESTimelineElement * self, GstClockTime end)
{
GESTimelineElementClass *klass;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->ripple_end) {
return klass->ripple_end (self, end);
}
GST_WARNING_OBJECT (self, "No ripple virtual method implementation"
" on class %s. Can not ripple end to %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (end));
return FALSE;
}
/**
* ges_timeline_element_roll_start:
* @self: The #GESTimelineElement to roll
* @start: The new start of @self in roll mode, it will also adapat
* the in-point of @self according
*
* Edits @self in roll mode. It allows you to modify the
* start and inpoint of a @self and "resize" (basicly change the duration
* in this case) of the previous neighbours accordingly.
* This will not change the overall timeline duration.
*
* Returns: %TRUE if the self as been roll properly, %FALSE if an error
* occured
*/
gboolean
ges_timeline_element_roll_start (GESTimelineElement * self, GstClockTime start)
{
GESTimelineElementClass *klass;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->roll_start) {
return klass->roll_start (self, start);
}
GST_WARNING_OBJECT (self, "No ripple virtual method implementation"
" on class %s. Can not roll to %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (start));
return FALSE;
}
/**
* ges_timeline_element_roll_end:
* @self: The #GESTimelineElement to roll.
* @end: The new end (start + duration) of @self in roll mode
*
* Edits @self in roll mode. It allows you to modify the
* duration of a @self and trim (basicly change the start + inpoint
* in this case) the following neighbours accordingly.
* This will not change the overall timeline duration.
*
* Returns: %TRUE if the self as been rolled properly, %FALSE if an error
* occured
*/
gboolean
ges_timeline_element_roll_end (GESTimelineElement * self, GstClockTime end)
{
GESTimelineElementClass *klass;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->roll_end)
return klass->roll_end (self, end);
GST_WARNING_OBJECT (self, "No ripple virtual method implementation"
" on class %s. Can not roll end to %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (end));
return FALSE;
}
/**
* ges_timeline_element_trim:
* @self: The #GESTimelineElement to trim.
* @start: The new start of @self in trim mode, will adapt the inpoint
* of @self accordingly
*
* Edits @self in trim mode. It allows you to modify the
* inpoint and start of @self.
* This will not change the overall timeline duration.
*
* Note that to trim the end of an self you can just set its duration. The same way
* as this method, it will take into account the snapping-distance property of the
* timeline in which @self is.
*
* Returns: %TRUE if the self as been trimmed properly, %FALSE if an error
* occured
*/
gboolean
ges_timeline_element_trim (GESTimelineElement * self, GstClockTime start)
{
GESTimelineElementClass *klass;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
if (klass->trim)
return klass->trim (self, start);
GST_WARNING_OBJECT (self, "No ripple virtual method implementation"
" on class %s. Can not trim to %" GST_TIME_FORMAT,
G_OBJECT_CLASS_NAME (klass), GST_TIME_ARGS (start));
return FALSE;
}
/**
* ges_timeline_element_copy:
* @self: The #GESTimelineElement to copy
* @deep: whether we want to create the elements @self contains or not
*
* Copies @self
*
* Returns: (transfer floating): The newly create #GESTimelineElement, copied from @self
*/
GESTimelineElement *
ges_timeline_element_copy (GESTimelineElement * self, gboolean deep)
{
GESAsset *asset;
GParameter *params;
GParamSpec **specs;
GESTimelineElementClass *klass;
guint n, n_specs, n_params;
GESTimelineElement *ret = NULL;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
klass = GES_TIMELINE_ELEMENT_GET_CLASS (self);
specs = g_object_class_list_properties (G_OBJECT_GET_CLASS (self), &n_specs);
params = g_new0 (GParameter, n_specs);
n_params = 0;
for (n = 0; n < n_specs; ++n) {
/* We do not want the timeline or the name to be copied */
if (g_strcmp0 (specs[n]->name, "parent") &&
g_strcmp0 (specs[n]->name, "timeline") &&
g_strcmp0 (specs[n]->name, "name") &&
(specs[n]->flags & G_PARAM_READWRITE) == G_PARAM_READWRITE) {
params[n_params].name = g_intern_string (specs[n]->name);
g_value_init (&params[n_params].value, specs[n]->value_type);
g_object_get_property (G_OBJECT (self), specs[n]->name,
&params[n_params].value);
++n_params;
}
}
ret = g_object_newv (G_OBJECT_TYPE (self), n_params, params);
g_free (specs);
g_free (params);
asset = ges_extractable_get_asset (GES_EXTRACTABLE (self));
if (asset)
ges_extractable_set_asset (GES_EXTRACTABLE (ret), asset);
if (deep) {
if (klass->deep_copy)
klass->deep_copy (self, ret);
else
GST_WARNING_OBJECT (self, "No deep_copy virtual method implementation"
" on class %s. Can not finish the copy", G_OBJECT_CLASS_NAME (klass));
}
return ret;
}
/**
* ges_timeline_element_get_toplevel_parent:
* @self: The #GESTimelineElement to get the toplevel parent from
*
* Gets the toplevel #GESTimelineElement controlling @self
*
* Returns: (transfer full): The toplevel controlling parent of @self
*/
GESTimelineElement *
ges_timeline_element_get_toplevel_parent (GESTimelineElement * self)
{
GESTimelineElement *toplevel = self;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), NULL);
while (GES_TIMELINE_ELEMENT_PARENT (toplevel))
toplevel = GES_TIMELINE_ELEMENT_PARENT (toplevel);
return gst_object_ref (toplevel);
}
/**
* ges_timeline_element_get_name:
* @self: a #GESTimelineElement
*
*
* Returns a copy of the name of @self.
* Caller should g_free() the return value after usage.
*
* Returns: (transfer full): The name of @self
*/
gchar *
ges_timeline_element_get_name (GESTimelineElement * self)
{
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), NULL);
return g_strdup (self->name);
}
/**
* ges_timeline_element_set_name:
* @self: a #GESTimelineElement
*
*
* Sets the name of object, or gives @self a guaranteed unique name (if name is NULL).
* This function makes a copy of the provided name, so the caller retains ownership
* of the name it sent.
*/
gboolean
ges_timeline_element_set_name (GESTimelineElement * self, const gchar * name)
{
gboolean result = TRUE, readd_to_timeline = FALSE;
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
if (name != NULL && !g_strcmp0 (name, self->name)) {
GST_DEBUG_OBJECT (self, "Same name!");
return TRUE;
}
/* parented objects cannot be renamed */
if (self->timeline != NULL) {
GESTimelineElement *tmp = ges_timeline_get_element (self->timeline, name);
if (tmp) {
gst_object_unref (tmp);
goto had_timeline;
}
timeline_remove_element (self->timeline, self);
readd_to_timeline = TRUE;
}
_set_name (self, name);
if (readd_to_timeline)
timeline_add_element (self->timeline, self);
return result;
/* error */
had_timeline:
{
GST_WARNING ("Objects already in a timeline can't be renamed");
return FALSE;
}
}