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gstreamer/ges/ges-clip.c
Thibault Saunier fc0333922f ges: Make it so core elements can be re added to their 'owners' 
The user might want to add/remove/add core children to clips and be able
to regroup ungrouped clip. This is needed for undo/redo in Pitivi for
example
2020-03-18 21:58:11 -03:00

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
* 2012 Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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:gesclip
* @title: GESClip
* @short_description: Base class for elements that occupy a single
* #GESLayer and maintain equal timings of their children
*
* #GESClip-s are the core objects of a #GESLayer. Each clip may exist in
* a single layer but may control several #GESTrackElement-s that span
* several #GESTrack-s. A clip will ensure that all its children share the
* same #GESTimelineElement:start and #GESTimelineElement:duration in
* their tracks, which will match the #GESTimelineElement:start and
* #GESTimelineElement:duration of the clip itself. Therefore, changing
* the timing of the clip will change the timing of the children, and a
* change in the timing of a child will change the timing of the clip and
* subsequently all its siblings. As such, a clip can be treated as a
* singular object in its layer.
*
* For most uses of a #GESTimeline, it is often sufficient to only
* interact with #GESClip-s directly, which will take care of creating and
* organising the elements of the timeline's tracks.
*
* Most subclassed clips will be associated with some *core*
* #GESTrackElement-s. When such a clip is added to a layer in a timeline,
* it will create these children and they will be added to the timeline's
* tracks. You can connect to the #GESContainer::child-added signal to be
* notified of their creation. If a clip will produce several core
* elements of the same #GESTrackElement:track-type but they are destined
* for separate tracks, you should connect to the timeline's
* #GESTimeline::select-tracks-for-object signal to coordinate which
* tracks each element should land in.
*
* The #GESTimelineElement:in-point of the clip will control the
* #GESTimelineElement:in-point of these core elements to be the same
* value if their #GESTrackElement:has-internal-source is set to %TRUE.
* The #GESTimelineElement:max-duration of the clip is the minimum
* #GESTimelineElement:max-duration of its children. If you set its value
* to anything other than its current value, this will also set the
* #GESTimelineElement:max-duration of all its core children to the same
* value if their #GESTrackElement:has-internal-source is set to %TRUE.
*
* ## Effects
*
* Some subclasses (#GESSourceClip and #GESBaseEffect) may also allow
* their objects to have additional non-core #GESBaseEffect-s elements as
* children. These are additional effects that are applied to the output
* data of the core elements. They can be added to the clip using
* ges_container_add(), which will take care of adding the effect to the
* timeline's tracks. The new effect will be placed between the clip's
* core track elements and its other effects. As such, the newly added
* effect will be applied to any source data **before** the other existing
* effects. You can change the ordering of effects using
* ges_clip_set_top_effect_index().
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-clip.h"
#include "ges.h"
#include "ges-internal.h"
#include <string.h>
static GList *ges_clip_create_track_elements_func (GESClip * clip,
GESTrackType type);
static gboolean _ripple (GESTimelineElement * element, GstClockTime start);
static gboolean _ripple_end (GESTimelineElement * element, GstClockTime end);
static gboolean _roll_start (GESTimelineElement * element, GstClockTime start);
static gboolean _roll_end (GESTimelineElement * element, GstClockTime end);
static gboolean _trim (GESTimelineElement * element, GstClockTime start);
static void _compute_height (GESContainer * container);
struct _GESClipPrivate
{
/*< public > */
GESLayer *layer;
/*< private > */
guint nb_effects;
GList *copied_track_elements;
GESLayer *copied_layer;
gboolean prevent_priority_offset_update;
gboolean prevent_resort;
gboolean updating_max_duration;
gboolean prevent_max_duration_update;
gboolean setting_inpoint;
/* The formats supported by this Clip */
GESTrackType supportedformats;
};
typedef struct _CheckTrack
{
GESTrack *track;
GESTrackElement *source;
} CheckTrack;
enum
{
PROP_0,
PROP_LAYER,
PROP_SUPPORTED_FORMATS,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GESClip, ges_clip, GES_TYPE_CONTAINER);
/****************************************************
* Listen to our children *
****************************************************/
/* @min_priority: The absolute minimum priority a child of @container should have
* @max_priority: The absolute maximum priority a child of @container should have
*/
static void
_get_priority_range_full (GESContainer * container, guint32 * min_priority,
guint32 * max_priority, guint32 priority_base)
{
GESLayer *layer = GES_CLIP (container)->priv->layer;
if (layer) {
*min_priority = priority_base + layer->min_nle_priority;
*max_priority = layer->max_nle_priority;
} else {
*min_priority = priority_base + MIN_NLE_PRIO;
*max_priority = G_MAXUINT32;
}
}
static void
_get_priority_range (GESContainer * container, guint32 * min_priority,
guint32 * max_priority)
{
_get_priority_range_full (container, min_priority, max_priority,
_PRIORITY (container));
}
static void
_child_priority_changed_cb (GESTimelineElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESContainer * container)
{
/* we do not change the rest of the clip in response to a change in
* the child priority */
guint32 min_prio, max_prio;
GESClipPrivate *priv = GES_CLIP (container)->priv;
GST_DEBUG_OBJECT (container, "TimelineElement %" GES_FORMAT
" priority changed to %u", GES_ARGS (child), _PRIORITY (child));
if (!priv->prevent_priority_offset_update) {
/* Update mapping */
_get_priority_range (container, &min_prio, &max_prio);
_ges_container_set_priority_offset (container, child,
min_prio - _PRIORITY (child));
}
if (!priv->prevent_resort) {
_ges_container_sort_children (container);
_compute_height (container);
}
}
static void
_child_inpoint_changed_cb (GESTimelineElement * child, GParamSpec * pspec,
GESContainer * container)
{
if (GES_CLIP (container)->priv->setting_inpoint)
return;
/* ignore non-core */
if (!ges_track_element_get_owners (GES_TRACK_ELEMENT (child)))
return;
/* if the track element has no internal content, then this means its
* in-point has been set (back) to 0, we can ignore this update */
if (!ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child)))
return;
/* If the child->inpoint is the same as our own, set_inpoint will do
* nothing. For example, when we set them in add_child (the notifies for
* this are released after child_added is called because
* ges_container_add freezes them) */
_set_inpoint0 (GES_TIMELINE_ELEMENT (container), child->inpoint);
}
/* called when a child is added, removed or their max-duration changes */
static void
_update_max_duration (GESContainer * container)
{
GList *tmp;
GstClockTime min = GST_CLOCK_TIME_NONE;
GESClipPrivate *priv = GES_CLIP (container)->priv;
if (priv->prevent_max_duration_update)
return;
for (tmp = container->children; tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (ges_track_element_get_owners (GES_TRACK_ELEMENT (child))
&& GST_CLOCK_TIME_IS_VALID (child->maxduration))
min = GST_CLOCK_TIME_IS_VALID (min) ? MIN (min, child->maxduration) :
child->maxduration;
}
priv->updating_max_duration = TRUE;
ges_timeline_element_set_max_duration (GES_TIMELINE_ELEMENT (container), min);
priv->updating_max_duration = FALSE;
}
static void
_child_max_duration_changed_cb (GESTimelineElement * child,
GParamSpec * pspec, GESContainer * container)
{
/* ignore non-core */
if (!ges_track_element_get_owners (GES_TRACK_ELEMENT (child)))
return;
_update_max_duration (container);
}
static void
_child_has_internal_source_changed_cb (GESTimelineElement * child,
GParamSpec * pspec, GESContainer * container)
{
/* ignore non-core */
if (!ges_track_element_get_owners (GES_TRACK_ELEMENT (child)))
return;
/* if the track element is now registered to have no internal content,
* we don't have to do anything */
if (!ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child)))
return;
/* otherwise, we need to make its in-point match ours */
_set_inpoint0 (child, _INPOINT (container));
}
/*****************************************************
* *
* GESTimelineElement virtual methods implementation *
* *
*****************************************************/
static gboolean
_set_start (GESTimelineElement * element, GstClockTime start)
{
GList *tmp, *children;
GESContainer *container = GES_CONTAINER (element);
GST_DEBUG_OBJECT (element, "Setting children start, (initiated_move: %"
GST_PTR_FORMAT ")", container->initiated_move);
/* get copy of children, since GESContainer may resort the clip */
children = ges_container_get_children (container, FALSE);
container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
for (tmp = children; tmp; tmp = g_list_next (tmp)) {
GESTimelineElement *child = (GESTimelineElement *) tmp->data;
if (child != container->initiated_move)
_set_start0 (GES_TIMELINE_ELEMENT (child), start);
}
container->children_control_mode = GES_CHILDREN_UPDATE;
g_list_free_full (children, gst_object_unref);
return TRUE;
}
/* Whether @clip can have its in-point set to @inpoint because none of
* its children have a max-duration below it */
gboolean
ges_clip_can_set_inpoint_of_child (GESClip * clip, GESTimelineElement * child,
GstClockTime inpoint)
{
GList *tmp;
/* don't bother checking if we are setting the value */
if (clip->priv->setting_inpoint)
return TRUE;
/* non-core children do not effect our in-point */
if (!ges_track_element_get_owners (GES_TRACK_ELEMENT (child)))
return TRUE;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (ges_track_element_get_owners (GES_TRACK_ELEMENT (child))
&& ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child))) {
if (GST_CLOCK_TIME_IS_VALID (child->maxduration)
&& child->maxduration < inpoint)
return FALSE;
}
}
return TRUE;
}
/* returns TRUE if we did not break early */
static gboolean
_set_childrens_inpoint (GESTimelineElement * element, GstClockTime inpoint,
gboolean break_on_failure)
{
GList *tmp;
GESClipPrivate *priv = GES_CLIP (element)->priv;
priv->setting_inpoint = TRUE;
for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (ges_track_element_get_owners (GES_TRACK_ELEMENT (child))
&& ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child))) {
if (!_set_inpoint0 (child, inpoint)) {
GST_ERROR_OBJECT ("Could not set the in-point of child %"
GES_FORMAT " to %" GST_TIME_FORMAT, GES_ARGS (child),
GST_TIME_ARGS (inpoint));
if (break_on_failure)
return FALSE;
}
}
}
priv->setting_inpoint = FALSE;
return TRUE;
}
static gboolean
_set_inpoint (GESTimelineElement * element, GstClockTime inpoint)
{
if (!_set_childrens_inpoint (element, inpoint, TRUE)) {
_set_childrens_inpoint (element, element->inpoint, FALSE);
return FALSE;
}
return TRUE;
}
static gboolean
_set_duration (GESTimelineElement * element, GstClockTime duration)
{
GList *tmp, *children;
GESContainer *container = GES_CONTAINER (element);
/* get copy of children, since GESContainer may resort the clip */
children = ges_container_get_children (container, FALSE);
container->children_control_mode = GES_CHILDREN_IGNORE_NOTIFIES;
for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
GESTimelineElement *child = (GESTimelineElement *) tmp->data;
if (child != container->initiated_move) {
ELEMENT_SET_FLAG (child, GES_TIMELINE_ELEMENT_SET_SIMPLE);
_set_duration0 (GES_TIMELINE_ELEMENT (child), duration);
ELEMENT_UNSET_FLAG (child, GES_TIMELINE_ELEMENT_SET_SIMPLE);
}
}
container->children_control_mode = GES_CHILDREN_UPDATE;
g_list_free_full (children, gst_object_unref);
return TRUE;
}
static gboolean
_set_max_duration (GESTimelineElement * element, GstClockTime maxduration)
{
GList *tmp;
GESClipPrivate *priv = GES_CLIP (element)->priv;
GstClockTime new_min = GST_CLOCK_TIME_NONE;
/* if we are setting based on a change in the minimum */
if (priv->updating_max_duration)
return TRUE;
/* else, we set every core child to have the same max duration */
priv->prevent_max_duration_update = TRUE;
for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (ges_track_element_get_owners (GES_TRACK_ELEMENT (child))
&& ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child))) {
if (!ges_timeline_element_set_max_duration (child, maxduration)) {
GST_ERROR_OBJECT ("Could not set the max-duration of child %"
GES_FORMAT " to %" GST_TIME_FORMAT, GES_ARGS (child),
GST_TIME_ARGS (maxduration));
}
if (GST_CLOCK_TIME_IS_VALID (child->maxduration)) {
new_min = GST_CLOCK_TIME_IS_VALID (new_min) ?
MIN (new_min, child->maxduration) : child->maxduration;
}
}
}
priv->prevent_max_duration_update = FALSE;
if (new_min != maxduration) {
if (GST_CLOCK_TIME_IS_VALID (new_min))
GST_WARNING_OBJECT (element, "Failed to set the max-duration of the "
"clip to %" GST_TIME_FORMAT " because it was not possible to "
"match this with the actual minimum of %" GST_TIME_FORMAT,
GST_TIME_ARGS (maxduration), GST_TIME_ARGS (new_min));
else
GST_WARNING_OBJECT (element, "Failed to set the max-duration of the "
"clip to %" GST_TIME_FORMAT " because it has no core children "
"whose max-duration could be set to anything other than "
"GST_CLOCK_TIME_NONE", GST_TIME_ARGS (maxduration));
priv->updating_max_duration = TRUE;
ges_timeline_element_set_max_duration (element, new_min);
priv->updating_max_duration = FALSE;
return FALSE;
}
return TRUE;
}
static gboolean
_set_priority (GESTimelineElement * element, guint32 priority)
{
GESClipPrivate *priv = GES_CLIP (element)->priv;
GList *tmp;
guint32 min_prio, max_prio;
GESContainer *container = GES_CONTAINER (element);
/* send the new 'priority' to determine what the new 'min_prio' should
* be for the clip */
_get_priority_range_full (container, &min_prio, &max_prio, priority);
/* offsets will remain constant for the children */
priv->prevent_resort = TRUE;
priv->prevent_priority_offset_update = TRUE;
for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
guint32 track_element_prio;
GESTimelineElement *child = (GESTimelineElement *) tmp->data;
gint off = _ges_container_get_priority_offset (container, child);
if (off >= LAYER_HEIGHT) {
GST_ERROR ("%s child %s as a priority offset %d >= LAYER_HEIGHT %d"
" ==> clamping it to 0", GES_TIMELINE_ELEMENT_NAME (element),
GES_TIMELINE_ELEMENT_NAME (child), off, LAYER_HEIGHT);
off = 0;
}
/* Want the priority offset 'off' of each child to stay the same with
* the new priority. The offset is calculated from
* offset = min_priority - child_priority
*/
track_element_prio = min_prio - off;
if (track_element_prio > max_prio) {
GST_WARNING ("%p priority of %i, is outside of the its containing "
"layer space. (%d/%d) setting it to the maximum it can be",
container, priority, min_prio, max_prio);
track_element_prio = max_prio;
}
_set_priority0 (child, track_element_prio);
}
/* no need to re-sort the container since we maintained the relative
* offsets. As such, the height remains the same as well. */
priv->prevent_resort = FALSE;
priv->prevent_priority_offset_update = FALSE;
return TRUE;
}
static guint32
_get_layer_priority (GESTimelineElement * element)
{
GESClip *clip = GES_CLIP (element);
if (clip->priv->layer == NULL)
return GES_TIMELINE_ELEMENT_NO_LAYER_PRIORITY;
return ges_layer_get_priority (clip->priv->layer);
}
/****************************************************
* *
* GESContainer virtual methods implementation *
* *
****************************************************/
static void
_compute_height (GESContainer * container)
{
GList *tmp;
guint32 min_prio = G_MAXUINT32, max_prio = 0;
if (container->children == NULL) {
/* FIXME Why not 0! */
_ges_container_set_height (container, 1);
return;
}
/* Go over all childs and check if height has changed */
for (tmp = container->children; tmp; tmp = tmp->next) {
guint tck_priority = _PRIORITY (tmp->data);
if (tck_priority < min_prio)
min_prio = tck_priority;
if (tck_priority > max_prio)
max_prio = tck_priority;
}
_ges_container_set_height (container, max_prio - min_prio + 1);
}
static gboolean
_add_child (GESContainer * container, GESTimelineElement * element)
{
GESClipClass *klass = GES_CLIP_GET_CLASS (GES_CLIP (container));
guint max_prio, min_prio;
GESClipPrivate *priv = GES_CLIP (container)->priv;
GList *child_core_owners;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (element), FALSE);
if (element->timeline
&& element->timeline != GES_TIMELINE_ELEMENT_TIMELINE (container)) {
GST_WARNING_OBJECT (container, "Can not add the child %" GES_FORMAT
" because its timeline is %" GST_PTR_FORMAT " rather than the "
"clip's timeline %" GST_PTR_FORMAT, GES_ARGS (element),
element->timeline, GES_TIMELINE_ELEMENT_TIMELINE (container));
return FALSE;
}
child_core_owners =
ges_track_element_get_owners (GES_TRACK_ELEMENT (element));
if (child_core_owners
&& !g_list_find (child_core_owners, GES_CLIP (container))) {
GST_WARNING_OBJECT (container,
"Can not add child %" GES_FORMAT " because we are not in it core owner"
" element list", GES_ARGS (element));
return FALSE;
}
/* NOTE: notifies are currently frozen by ges_container_add */
_get_priority_range (container, &min_prio, &max_prio);
if (child_core_owners) {
/* NOTE: Core track elements that are base effects are added like any
* other core clip. In particular, they are *not* added to the list of
* added effects, so we don not increase nb_effects. */
/* Set the core element to have the same in-point, which we don't
* apply to effects */
if (ges_track_element_has_internal_source (GES_TRACK_ELEMENT (element))) {
/* adding can fail if the max-duration of the element is smaller
* than the current in-point of the clip */
if (!_set_inpoint0 (element, _INPOINT (container))) {
GST_ERROR_OBJECT (element, "Could not set the in-point of the "
"element %" GES_FORMAT " to %" GST_TIME_FORMAT ". Not adding "
"as a child", GES_ARGS (element),
GST_TIME_ARGS (_INPOINT (container)));
return FALSE;
}
}
/* Always add at the same priority, on top of existing effects */
_set_priority0 (element, min_prio + priv->nb_effects);
} else if (GES_CLIP_CLASS_CAN_ADD_EFFECTS (klass) &&
GES_IS_BASE_EFFECT (element)) {
GList *tmp;
/* Add the effect at the lowest priority among effects (just after
* the core elements). Need to shift the core elements up by 1
* to make room. */
GST_DEBUG_OBJECT (container, "Adding %ith effect: %" GES_FORMAT
" Priority %i", priv->nb_effects + 1, GES_ARGS (element),
min_prio + priv->nb_effects);
/* changing priorities, and updating their offset */
priv->prevent_resort = TRUE;
tmp = g_list_nth (GES_CONTAINER_CHILDREN (container), priv->nb_effects);
for (; tmp; tmp = tmp->next)
ges_timeline_element_set_priority (GES_TIMELINE_ELEMENT (tmp->data),
GES_TIMELINE_ELEMENT_PRIORITY (tmp->data) + 1);
_set_priority0 (element, min_prio + priv->nb_effects);
priv->nb_effects++;
priv->prevent_resort = FALSE;
/* no need to call _ges_container_sort_children (container) since
* there is no change to the ordering yet (this happens after the
* child is actually added) */
/* The height has already changed (increased by 1) */
_compute_height (container);
} else {
if (GES_IS_BASE_EFFECT (element))
GST_WARNING_OBJECT (container, "Can not add the effect %" GES_FORMAT
" because it is not a core element created by the clip itself "
"and the %s class does not allow for the adding extra effects",
GES_ARGS (element), G_OBJECT_CLASS_NAME (klass));
else if (GES_CLIP_CLASS_CAN_ADD_EFFECTS (klass))
GST_WARNING_OBJECT (container, "Can not add the track element %"
GES_FORMAT " because it is neither a core element created by "
"the clip itself, nor a GESBaseEffect", GES_ARGS (element));
else
GST_WARNING_OBJECT (container, "Can not add the track element %"
GES_FORMAT " because it is not a core element created by the "
"clip itself", GES_ARGS (element));
return FALSE;
}
_set_start0 (element, GES_TIMELINE_ELEMENT_START (container));
_set_duration0 (element, GES_TIMELINE_ELEMENT_DURATION (container));
return TRUE;
}
static gboolean
_remove_child (GESContainer * container, GESTimelineElement * element)
{
GESClipPrivate *priv = GES_CLIP (container)->priv;
/* NOTE: notifies are currently frozen by ges_container_add */
if (!ges_track_element_get_owners (GES_TRACK_ELEMENT (element))
&& GES_IS_BASE_EFFECT (element)) {
GList *tmp;
GST_DEBUG_OBJECT (container, "Resyncing effects priority.");
/* changing priorities, so preventing a re-sort */
priv->prevent_resort = TRUE;
for (tmp = GES_CONTAINER_CHILDREN (container); tmp; tmp = tmp->next) {
guint32 sibling_prio = GES_TIMELINE_ELEMENT_PRIORITY (tmp->data);
if (sibling_prio > element->priority)
ges_timeline_element_set_priority (GES_TIMELINE_ELEMENT (tmp->data),
sibling_prio - 1);
}
priv->nb_effects--;
priv->prevent_resort = FALSE;
/* no need to re-sort the children since the rest keep the same
* relative priorities */
/* height may have changed */
_compute_height (container);
}
/* Core owner is not reset so that the child can be readded here in @container
* but not in any other clip by the end user */
return TRUE;
}
static void
_child_added (GESContainer * container, GESTimelineElement * element)
{
g_signal_connect (G_OBJECT (element), "notify::priority",
G_CALLBACK (_child_priority_changed_cb), container);
g_signal_connect (G_OBJECT (element), "notify::in-point",
G_CALLBACK (_child_inpoint_changed_cb), container);
g_signal_connect (G_OBJECT (element), "notify::max-duration",
G_CALLBACK (_child_max_duration_changed_cb), container);
g_signal_connect (G_OBJECT (element), "notify::has-internal-source",
G_CALLBACK (_child_has_internal_source_changed_cb), container);
_child_priority_changed_cb (element, NULL, container);
_update_max_duration (container);
}
static void
_child_removed (GESContainer * container, GESTimelineElement * element)
{
g_signal_handlers_disconnect_by_func (element, _child_priority_changed_cb,
container);
g_signal_handlers_disconnect_by_func (element, _child_inpoint_changed_cb,
container);
g_signal_handlers_disconnect_by_func (element,
_child_max_duration_changed_cb, container);
g_signal_handlers_disconnect_by_func (element,
_child_has_internal_source_changed_cb, container);
_update_max_duration (container);
}
static void
add_clip_to_list (gpointer key, gpointer clip, GList ** list)
{
*list = g_list_prepend (*list, gst_object_ref (clip));
}
static void
_transfer_child (GESClip * from_clip, GESClip * to_clip,
GESTrackElement * child)
{
/* We need to bump the refcount to avoid the object to be destroyed */
gst_object_ref (child);
ges_container_remove (GES_CONTAINER (from_clip),
GES_TIMELINE_ELEMENT (child));
if (ges_track_element_get_owners (GES_TRACK_ELEMENT (child)))
ges_track_element_add_owner (GES_TRACK_ELEMENT (child), to_clip);
ges_container_add (GES_CONTAINER (to_clip), GES_TIMELINE_ELEMENT (child));
gst_object_unref (child);
}
static GList *
_ungroup (GESContainer * container, gboolean recursive)
{
GESClip *tmpclip;
GESTrackType track_type;
GESTrackElement *track_element;
gboolean first_obj = TRUE;
GList *tmp, *children, *ret = NULL;
GESClip *clip = GES_CLIP (container);
GESTimelineElement *element = GES_TIMELINE_ELEMENT (container);
GESLayer *layer = clip->priv->layer;
GHashTable *_tracktype_clip = g_hash_table_new (g_int_hash, g_int_equal);
/* If there is no TrackElement, just return @container in a list */
if (GES_CONTAINER_CHILDREN (container) == NULL) {
GST_DEBUG ("No TrackElement, simply returning");
return g_list_prepend (ret, container);
}
/* We need a copy of the current list of tracks */
children = ges_container_get_children (container, FALSE);
for (tmp = children; tmp; tmp = tmp->next) {
track_element = GES_TRACK_ELEMENT (tmp->data);
track_type = ges_track_element_get_track_type (track_element);
tmpclip = g_hash_table_lookup (_tracktype_clip, &track_type);
if (tmpclip == NULL) {
if (G_UNLIKELY (first_obj == TRUE)) {
tmpclip = clip;
first_obj = FALSE;
} else {
tmpclip = GES_CLIP (ges_timeline_element_copy (element, FALSE));
if (layer) {
/* Add new container to the same layer as @container */
ges_clip_set_moving_from_layer (tmpclip, TRUE);
ges_layer_add_clip (layer, tmpclip);
ges_clip_set_moving_from_layer (tmpclip, FALSE);
}
}
g_hash_table_insert (_tracktype_clip, &track_type, tmpclip);
ges_clip_set_supported_formats (tmpclip, track_type);
}
/* Move trackelement to the container it is supposed to land into */
if (tmpclip != clip)
_transfer_child (clip, tmpclip, track_element);
}
g_list_free_full (children, gst_object_unref);
g_hash_table_foreach (_tracktype_clip, (GHFunc) add_clip_to_list, &ret);
g_hash_table_unref (_tracktype_clip);
return ret;
}
static GESContainer *
_group (GList * containers)
{
CheckTrack *tracks = NULL;
GESTimeline *timeline = NULL;
GESTrackType supported_formats;
GESLayer *layer = NULL;
GList *tmp, *tmpclip, *tmpelement;
GstClockTime start, inpoint, duration;
GESAsset *asset = NULL;
GESContainer *ret = NULL;
guint nb_tracks = 0, i = 0;
start = inpoint = duration = GST_CLOCK_TIME_NONE;
if (!containers)
return NULL;
/* First check if all the containers are clips, if they
* all have the same start/inpoint/duration and are in the same
* layer.
*
* We also need to make sure that all source have been created by the
* same asset, keep the information */
for (tmp = containers; tmp; tmp = tmp->next) {
GESClip *clip;
GESTimeline *tmptimeline;
GESContainer *tmpcontainer;
GESTimelineElement *element;
tmpcontainer = GES_CONTAINER (tmp->data);
element = GES_TIMELINE_ELEMENT (tmp->data);
if (GES_IS_CLIP (element) == FALSE) {
GST_DEBUG ("Can only work with clips");
goto done;
}
clip = GES_CLIP (tmp->data);
tmptimeline = GES_TIMELINE_ELEMENT_TIMELINE (element);
if (!timeline) {
GList *tmptrack;
start = _START (tmpcontainer);
inpoint = _INPOINT (tmpcontainer);
duration = _DURATION (tmpcontainer);
timeline = tmptimeline;
layer = clip->priv->layer;
nb_tracks = g_list_length (GES_TIMELINE_GET_TRACKS (timeline));
tracks = g_new0 (CheckTrack, nb_tracks);
for (tmptrack = GES_TIMELINE_GET_TRACKS (timeline); tmptrack;
tmptrack = tmptrack->next) {
tracks[i].track = tmptrack->data;
i++;
}
} else {
/* FIXME: we should allow the inpoint to be different if not a
* core track element of the clip.
* E.g. a GESEffect on a GESUriClip */
if (start != _START (tmpcontainer) ||
inpoint != _INPOINT (tmpcontainer) ||
duration != _DURATION (tmpcontainer) || clip->priv->layer != layer) {
GST_INFO ("All children must have the same start, inpoint, duration "
"and be in the same layer");
goto done;
} else {
GList *tmp2;
for (tmp2 = GES_CONTAINER_CHILDREN (tmp->data); tmp2; tmp2 = tmp2->next) {
GESTrackElement *track_element = GES_TRACK_ELEMENT (tmp2->data);
if (GES_IS_SOURCE (track_element)) {
guint i;
for (i = 0; i < nb_tracks; i++) {
if (tracks[i].track ==
ges_track_element_get_track (track_element)) {
if (tracks[i].source) {
GST_INFO ("Can not link clips with various source for a "
"same track");
goto done;
}
tracks[i].source = track_element;
break;
}
}
}
}
}
}
}
/* Then check that all sources have been created by the same asset,
* otherwise we can not group */
for (i = 0; i < nb_tracks; i++) {
if (tracks[i].source == NULL) {
GST_FIXME ("Check what to do here as we might end up having a mess");
continue;
}
/* FIXME Check what to do if we have source that have no assets */
if (!asset) {
asset =
ges_extractable_get_asset (GES_EXTRACTABLE
(ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (tracks
[i].source))));
continue;
}
if (asset !=
ges_extractable_get_asset (GES_EXTRACTABLE
(ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (tracks
[i].source))))) {
GST_INFO ("Can not link clips with source coming from different assets");
goto done;
}
}
/* And now pass all TrackElements to the first clip,
* and remove others from the layer (updating the supported formats) */
ret = containers->data;
supported_formats = GES_CLIP (ret)->priv->supportedformats;
for (tmpclip = containers->next; tmpclip; tmpclip = tmpclip->next) {
GESClip *cclip = tmpclip->data;
GList *children = ges_container_get_children (GES_CONTAINER (cclip), FALSE);
for (tmpelement = children; tmpelement; tmpelement = tmpelement->next) {
GESTrackElement *celement = GES_TRACK_ELEMENT (tmpelement->data);
_transfer_child (cclip, GES_CLIP (ret), celement);
supported_formats |= ges_track_element_get_track_type (celement);
}
g_list_free_full (children, gst_object_unref);
ges_layer_remove_clip (layer, tmpclip->data);
}
ges_clip_set_supported_formats (GES_CLIP (ret), supported_formats);
done:
if (tracks)
g_free (tracks);
return ret;
}
static void
_deep_copy (GESTimelineElement * element, GESTimelineElement * copy)
{
GList *tmp;
GESClip *self = GES_CLIP (element), *ccopy = GES_CLIP (copy);
GESTrackElement *el, *el_copy;
if (!self->priv->layer)
return;
for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
el = GES_TRACK_ELEMENT (tmp->data);
/* copies the children properties */
el_copy = GES_TRACK_ELEMENT (ges_timeline_element_copy (tmp->data, TRUE));
if (ges_track_element_get_owners (el))
ges_track_element_add_owner (el_copy, ccopy);
ges_track_element_copy_bindings (el, el_copy, GST_CLOCK_TIME_NONE);
ccopy->priv->copied_track_elements =
g_list_append (ccopy->priv->copied_track_elements, el_copy);
}
ccopy->priv->copied_layer = g_object_ref (self->priv->layer);
}
static GESTimelineElement *
_paste (GESTimelineElement * element, GESTimelineElement * ref,
GstClockTime paste_position)
{
GList *tmp;
GESClip *self = GES_CLIP (element);
GESClip *nclip = GES_CLIP (ges_timeline_element_copy (element, FALSE));
if (self->priv->copied_layer)
nclip->priv->copied_layer = g_object_ref (self->priv->copied_layer);
ges_timeline_element_set_start (GES_TIMELINE_ELEMENT (nclip), paste_position);
for (tmp = self->priv->copied_track_elements; tmp; tmp = tmp->next) {
GESTrackElement *new_trackelement, *trackelement =
GES_TRACK_ELEMENT (tmp->data);
/* NOTE: we do not deep copy the track element, we instead call
* ges_track_element_copy_properties explicitly, which is the
* deep_copy for the GESTrackElementClass. */
new_trackelement =
GES_TRACK_ELEMENT (ges_timeline_element_copy (GES_TIMELINE_ELEMENT
(trackelement), FALSE));
if (new_trackelement == NULL) {
GST_WARNING_OBJECT (trackelement, "Could not create a copy");
continue;
}
if (ges_track_element_get_owners (trackelement))
ges_track_element_add_owner (new_trackelement, nclip);
ges_container_add (GES_CONTAINER (nclip),
GES_TIMELINE_ELEMENT (new_trackelement));
ges_track_element_copy_properties (GES_TIMELINE_ELEMENT (trackelement),
GES_TIMELINE_ELEMENT (new_trackelement));
ges_track_element_copy_bindings (trackelement, new_trackelement,
GST_CLOCK_TIME_NONE);
}
/* FIXME: should we bypass the select-tracks-for-object signal when
* copying and pasting? */
if (self->priv->copied_layer) {
if (!ges_layer_add_clip (self->priv->copied_layer, nclip)) {
GST_INFO ("%" GES_FORMAT " could not be pasted to %" GST_TIME_FORMAT,
GES_ARGS (element), GST_TIME_ARGS (paste_position));
return NULL;
}
}
return GES_TIMELINE_ELEMENT (nclip);
}
static gboolean
_lookup_child (GESTimelineElement * self, const gchar * prop_name,
GObject ** child, GParamSpec ** pspec)
{
GList *tmp;
if (GES_TIMELINE_ELEMENT_CLASS (ges_clip_parent_class)->lookup_child (self,
prop_name, child, pspec))
return TRUE;
for (tmp = GES_CONTAINER_CHILDREN (self); tmp; tmp = tmp->next) {
if (ges_timeline_element_lookup_child (tmp->data, prop_name, child, pspec))
return TRUE;
}
return FALSE;
}
/****************************************************
* *
* GObject virtual methods implementation *
* *
****************************************************/
static void
ges_clip_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESClip *clip = GES_CLIP (object);
switch (property_id) {
case PROP_LAYER:
g_value_set_object (value, clip->priv->layer);
break;
case PROP_SUPPORTED_FORMATS:
g_value_set_flags (value, clip->priv->supportedformats);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_clip_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESClip *clip = GES_CLIP (object);
switch (property_id) {
case PROP_SUPPORTED_FORMATS:
ges_clip_set_supported_formats (clip, g_value_get_flags (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_clip_dispose (GObject * object)
{
GESClip *self = GES_CLIP (object);
g_list_free_full (self->priv->copied_track_elements, g_object_unref);
self->priv->copied_track_elements = NULL;
g_clear_object (&self->priv->copied_layer);
G_OBJECT_CLASS (ges_clip_parent_class)->dispose (object);
}
static void
ges_clip_class_init (GESClipClass * 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_clip_get_property;
object_class->set_property = ges_clip_set_property;
object_class->dispose = ges_clip_dispose;
klass->create_track_elements = ges_clip_create_track_elements_func;
klass->create_track_element = NULL;
/**
* GESClip:supported-formats:
*
* The #GESTrackType-s that the clip supports, which it can create
* #GESTrackElement-s for. Note that this can be a combination of
* #GESTrackType flags to indicate support for several
* #GESTrackElement:track-type elements.
*/
properties[PROP_SUPPORTED_FORMATS] = g_param_spec_flags ("supported-formats",
"Supported formats", "Formats supported by the clip",
GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_AUDIO | GES_TRACK_TYPE_VIDEO,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
g_object_class_install_property (object_class, PROP_SUPPORTED_FORMATS,
properties[PROP_SUPPORTED_FORMATS]);
/**
* GESClip:layer:
*
* The layer this clip lies in.
*
* If you want to connect to this property's #GObject::notify signal,
* you should connect to it with g_signal_connect_after() since the
* signal emission may be stopped internally.
*/
properties[PROP_LAYER] = g_param_spec_object ("layer", "Layer",
"The GESLayer where this clip is being used.",
GES_TYPE_LAYER, G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_LAYER,
properties[PROP_LAYER]);
element_class->ripple = _ripple;
element_class->ripple_end = _ripple_end;
element_class->roll_start = _roll_start;
element_class->roll_end = _roll_end;
element_class->trim = _trim;
element_class->set_start = _set_start;
element_class->set_duration = _set_duration;
element_class->set_inpoint = _set_inpoint;
element_class->set_priority = _set_priority;
element_class->set_max_duration = _set_max_duration;
element_class->paste = _paste;
element_class->deep_copy = _deep_copy;
element_class->lookup_child = _lookup_child;
element_class->get_layer_priority = _get_layer_priority;
container_class->add_child = _add_child;
container_class->remove_child = _remove_child;
container_class->child_removed = _child_removed;
container_class->child_added = _child_added;
container_class->ungroup = _ungroup;
container_class->group = _group;
container_class->grouping_priority = G_MAXUINT;
}
static void
ges_clip_init (GESClip * self)
{
GESClipPrivate *priv;
priv = self->priv = ges_clip_get_instance_private (self);
priv->layer = NULL;
priv->nb_effects = 0;
priv->prevent_priority_offset_update = FALSE;
priv->prevent_resort = FALSE;
priv->updating_max_duration = FALSE;
priv->prevent_max_duration_update = FALSE;
priv->setting_inpoint = FALSE;
}
/**
* ges_clip_create_track_element:
* @clip: A #GESClip
* @type: The track to create an element for
*
* Creates the core #GESTrackElement of the clip, of the given track type.
*
* Note, unlike ges_clip_create_track_elements(), this does not add the
* created track element to the clip or set their timings.
*
* Returns: (transfer floating) (nullable): The element created
* by @clip, or %NULL if @clip can not provide a track element for the
* given @type or an error occurred.
*/
GESTrackElement *
ges_clip_create_track_element (GESClip * clip, GESTrackType type)
{
GESClipClass *class;
GESTrackElement *res;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
GST_DEBUG_OBJECT (clip, "Creating track element for %s",
ges_track_type_name (type));
if (!(type & clip->priv->supportedformats)) {
GST_DEBUG_OBJECT (clip, "We don't support this track type %i", type);
return NULL;
}
class = GES_CLIP_GET_CLASS (clip);
if (G_UNLIKELY (class->create_track_element == NULL)) {
GST_ERROR ("No 'create_track_element' implementation available fo type %s",
G_OBJECT_TYPE_NAME (clip));
return NULL;
}
res = class->create_track_element (clip, type);
return res;
}
/**
* ges_clip_create_track_elements:
* @clip: A #GESClip
* @type: The track-type to create elements for
*
* Creates the core #GESTrackElement-s of the clip, of the given track
* type, and adds them to the clip.
*
* Returns: (transfer container) (element-type GESTrackElement): A list of
* the #GESTrackElement-s created by @clip for the given @type, or %NULL
* if no track elements are created or an error occurred.
*/
GList *
ges_clip_create_track_elements (GESClip * clip, GESTrackType type)
{
GList *result = NULL, *tmp, *children;
GESClipClass *klass;
gboolean readding_effects_only = TRUE;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
klass = GES_CLIP_GET_CLASS (clip);
if (!(klass->create_track_elements)) {
GST_WARNING ("no GESClip::create_track_elements implentation");
return NULL;
}
GST_DEBUG_OBJECT (clip, "Creating TrackElements for type: %s",
ges_track_type_name (type));
children = ges_container_get_children (GES_CONTAINER (clip), TRUE);
for (tmp = children; tmp; tmp = tmp->next) {
GESTrackElement *child = GES_TRACK_ELEMENT (tmp->data);
if (!ges_track_element_get_track (child)
&& ges_track_element_get_track_type (child) & type) {
GST_DEBUG_OBJECT (clip, "Removing for reusage: %" GST_PTR_FORMAT, child);
result = g_list_append (result, g_object_ref (child));
ges_container_remove (GES_CONTAINER (clip), tmp->data);
if (ges_track_element_get_owners (GES_TRACK_ELEMENT (child)))
readding_effects_only = FALSE;
}
}
g_list_free_full (children, gst_object_unref);
/* FIXME: we need something smarter to determine whether we should
* create the track elements.
* Currently, if the clip contains at least one element with a matching
* track-type, not in a track and not a GESBaseEffect, we will not
* recreate the track elements! But this is not a reliable indicator.
*
* For example, consider a uri clip that creates two audio track
* elements: El_A and El_B. First, we add the clip to a timeline that
* only has a single track: Track_A, and we connect to the timeline's
* ::select-tracks-for-object signal to only allow El_A to end up in
* Track_A. As such, whilst both El_A and El_B are initially created,
* El_B will eventually be removed from the clip since it has no track
* (see clip_track_element_added_cb in ges-timeline.c). As such, we now
* have a clip that only contains El_A.
* Next, we remove Track_A from the timeline. El_A will remain a child
* of the clip, but now has its track unset.
* Next, we add Track_B to the timeline, and we connect to the
* timeline's ::select-tracks-for-object signal to only allow El_B to
* end up in Track_B.
*
* However, since the clip contains an audio track element, that is not
* an effect and has no track set: El_A. Therefore, the
* create_track_elements method below will not be called, so we will not
* have an El_B created for Track_B!
*
* Moreover, even if we did recreate the track elements, we would be
* creating El_A again! We could destroy and recreate El_A instead, or
* we would need a way to determine exactly which elements need to be
* recreated.
*/
if (readding_effects_only) {
GList *track_elements = klass->create_track_elements (clip, type);
for (tmp = track_elements; tmp; tmp = tmp->next)
ges_track_element_add_owner (tmp->data, clip);
result = g_list_concat (track_elements, result);
}
for (tmp = result; tmp; tmp = tmp->next) {
ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (tmp->data));
}
return result;
}
/*
* default implementation of GESClipClass::create_track_elements
*/
GList *
ges_clip_create_track_elements_func (GESClip * clip, GESTrackType type)
{
GESTrackElement *result;
GST_DEBUG_OBJECT (clip, "Creating trackelement for track: %s",
ges_track_type_name (type));
result = ges_clip_create_track_element (clip, type);
if (!result) {
GST_DEBUG ("Did not create track element");
return NULL;
}
return g_list_append (NULL, result);
}
void
ges_clip_set_layer (GESClip * clip, GESLayer * layer)
{
if (layer == clip->priv->layer)
return;
clip->priv->layer = layer;
GST_DEBUG ("clip:%p, layer:%p", clip, layer);
/* We do not want to notify the setting of layer = NULL when
* it is actually the result of a move between layer (as we know
* that it will be added to another layer right after, and this
* is what imports here.) */
if (!ELEMENT_FLAG_IS_SET (clip, GES_CLIP_IS_MOVING))
g_object_notify_by_pspec (G_OBJECT (clip), properties[PROP_LAYER]);
}
/**
* ges_clip_set_moving_from_layer:
* @clip: A #GESClip
* @is_moving: %TRUE if you want to start moving @clip to another layer
* %FALSE when you finished moving it
*
* Sets the clip in a moving to layer state. You might rather use the
* ges_clip_move_to_layer function to move #GESClip-s
* from a layer to another.
**/
void
ges_clip_set_moving_from_layer (GESClip * clip, gboolean is_moving)
{
g_return_if_fail (GES_IS_CLIP (clip));
if (is_moving)
ELEMENT_SET_FLAG (clip, GES_CLIP_IS_MOVING);
else
ELEMENT_UNSET_FLAG (clip, GES_CLIP_IS_MOVING);
}
/**
* ges_clip_is_moving_from_layer:
* @clip: A #GESClip
*
* Tells you if the clip is currently moving from a layer to another.
* You might rather use the ges_clip_move_to_layer function to
* move #GESClip-s from a layer to another.
*
* Returns: %TRUE if @clip is currently moving from its current layer
* %FALSE otherwize.
**/
gboolean
ges_clip_is_moving_from_layer (GESClip * clip)
{
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
return ELEMENT_FLAG_IS_SET (clip, GES_CLIP_IS_MOVING);
}
/**
* ges_clip_move_to_layer:
* @clip: A #GESClip
* @layer: The new layer
*
* Moves a clip to a new layer. If the clip already exists in a layer, it
* is first removed from its current layer before being added to the new
* layer.
*
* Returns: %TRUE if @clip was successfully moved to @layer.
*/
gboolean
ges_clip_move_to_layer (GESClip * clip, GESLayer * layer)
{
gboolean ret;
GESLayer *current_layer;
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
ELEMENT_SET_FLAG (clip, GES_CLIP_IS_MOVING);
if (layer->timeline
&& !timeline_tree_can_move_element (timeline_get_tree (layer->timeline),
GES_TIMELINE_ELEMENT (clip),
ges_layer_get_priority (layer),
GES_TIMELINE_ELEMENT_START (clip),
GES_TIMELINE_ELEMENT_DURATION (clip), NULL)) {
GST_INFO_OBJECT (layer, "Clip %" GES_FORMAT " can't move to layer %d",
GES_ARGS (clip), ges_layer_get_priority (layer));
ELEMENT_UNSET_FLAG (clip, GES_CLIP_IS_MOVING);
return FALSE;
}
current_layer = clip->priv->layer;
if (current_layer == NULL) {
GST_DEBUG ("Not moving %p, only adding it to %p", clip, layer);
return ges_layer_add_clip (layer, clip);
}
GST_DEBUG_OBJECT (clip, "moving to layer %p, priority: %d", layer,
ges_layer_get_priority (layer));
gst_object_ref (clip);
ret = ges_layer_remove_clip (current_layer, clip);
if (!ret) {
ELEMENT_UNSET_FLAG (clip, GES_CLIP_IS_MOVING);
gst_object_unref (clip);
return FALSE;
}
ret = ges_layer_add_clip (layer, clip);
ELEMENT_UNSET_FLAG (clip, GES_CLIP_IS_MOVING);
gst_object_unref (clip);
g_object_notify_by_pspec (G_OBJECT (clip), properties[PROP_LAYER]);
return ret && (clip->priv->layer == layer);
}
/**
* ges_clip_find_track_element:
* @clip: A #GESClip
* @track: (allow-none): The track to search in, or %NULL to search in
* all tracks
* @type: The type of track element to search for, or `G_TYPE_NONE` to
* match any type
*
* Finds an element controlled by the clip. If @track is given,
* then only the track elements in @track are searched for. If @type is
* given, then this function searches for a track element of the given
* @type.
*
* Note, if multiple track elements in the clip match the given criteria,
* this will return the element amongst them with the highest
* #GESTimelineElement:priority (numerically, the smallest). See
* ges_clip_find_track_elements() if you wish to find all such elements.
*
* Returns: (transfer full) (nullable): The element controlled by
* @clip, in @track, and of the given @type, or %NULL if no such element
* could be found.
*/
GESTrackElement *
ges_clip_find_track_element (GESClip * clip, GESTrack * track, GType type)
{
GList *tmp;
GESTrackElement *otmp;
GESTrackElement *ret = NULL;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
g_return_val_if_fail (!(track == NULL && type == G_TYPE_NONE), NULL);
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = g_list_next (tmp)) {
otmp = (GESTrackElement *) tmp->data;
if ((type != G_TYPE_NONE) && !G_TYPE_CHECK_INSTANCE_TYPE (tmp->data, type))
continue;
if ((track == NULL) || (ges_track_element_get_track (otmp) == track)) {
ret = GES_TRACK_ELEMENT (tmp->data);
gst_object_ref (ret);
break;
}
}
return ret;
}
/**
* ges_clip_get_layer:
* @clip: A #GESClip
*
* Gets the #GESClip:layer of the clip.
*
* Returns: (transfer full) (nullable): The layer @clip is in, or %NULL if
* @clip is not in any layer.
*/
GESLayer *
ges_clip_get_layer (GESClip * clip)
{
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
if (clip->priv->layer != NULL)
gst_object_ref (G_OBJECT (clip->priv->layer));
return clip->priv->layer;
}
/**
* ges_clip_get_top_effects:
* @clip: A #GESClip
*
* Gets the #GESBaseEffect-s that have been added to the clip. The
* returned list is ordered by their internal index in the clip. See
* ges_clip_get_top_effect_index().
*
* Returns: (transfer full) (element-type GESTrackElement): A list of all
* #GESBaseEffect-s that have been added to @clip.
*/
GList *
ges_clip_get_top_effects (GESClip * clip)
{
GList *tmp, *ret;
GESTimelineElement *child;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
GST_DEBUG_OBJECT (clip, "Getting the %i top effects", clip->priv->nb_effects);
ret = NULL;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
child = tmp->data;
if (GES_IS_BASE_EFFECT (child)
&& !ges_track_element_get_owners (GES_TRACK_ELEMENT (child)))
ret = g_list_append (ret, gst_object_ref (child));
}
/* list is already sorted by index because the list of children is
* sorted by priority */
return ret;
}
static gboolean
_is_added_effect (GESClip * clip, GESBaseEffect * effect)
{
if (GES_TIMELINE_ELEMENT_PARENT (effect) != GES_TIMELINE_ELEMENT (clip)) {
GST_WARNING_OBJECT (clip, "The effect %" GES_FORMAT
" doe not belong to this clip", GES_ARGS (effect));
return FALSE;
}
if (ges_track_element_get_owners (GES_TRACK_ELEMENT (effect))) {
GST_WARNING_OBJECT (clip, "The effect %" GES_FORMAT " is not a top "
"effect of this clip (it is a core element of the clip)",
GES_ARGS (effect));
return FALSE;
}
return TRUE;
}
/**
* ges_clip_get_top_effect_index:
* @clip: A #GESClip
* @effect: The effect we want to get the index of
*
* Gets the internal index of an effect in the clip. The index of effects
* in a clip will run from 0 to n-1, where n is the total number of
* effects. If two effects share the same #GESTrackElement:track, the
* effect with the numerically lower index will be applied to the source
* data **after** the other effect, i.e. output data will always flow from
* a higher index effect to a lower index effect.
*
* Returns: The index of @effect in @clip, or -1 if something went wrong.
*/
gint
ges_clip_get_top_effect_index (GESClip * clip, GESBaseEffect * effect)
{
guint max_prio, min_prio;
g_return_val_if_fail (GES_IS_CLIP (clip), -1);
g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), -1);
if (!_is_added_effect (clip, effect))
return -1;
_get_priority_range (GES_CONTAINER (clip), &min_prio, &max_prio);
return GES_TIMELINE_ELEMENT_PRIORITY (effect) - min_prio;
}
/* TODO 2.0 remove as it is Deprecated */
gint
ges_clip_get_top_effect_position (GESClip * clip, GESBaseEffect * effect)
{
return ges_clip_get_top_effect_index (clip, effect);
}
/* TODO 2.0 remove as it is Deprecated */
gboolean
ges_clip_set_top_effect_priority (GESClip * clip,
GESBaseEffect * effect, guint newpriority)
{
return ges_clip_set_top_effect_index (clip, effect, newpriority);
}
/**
* ges_clip_set_top_effect_index:
* @clip: A #GESClip
* @effect: An effect within @clip to move
* @newindex: The index for @effect in @clip
*
* Set the index of an effect within the clip. See
* ges_clip_get_top_effect_index(). The new index must be an existing
* index of the clip. The effect is moved to the new index, and the other
* effects may be shifted in index accordingly to otherwise maintain the
* ordering.
*
* Returns: %TRUE if @effect was successfully moved to @newindex.
*/
gboolean
ges_clip_set_top_effect_index (GESClip * clip, GESBaseEffect * effect,
guint newindex)
{
gint inc;
GList *tmp;
guint current_prio, min_prio, max_prio;
GESTrackElement *track_element;
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), FALSE);
if (!_is_added_effect (clip, effect))
return FALSE;
track_element = GES_TRACK_ELEMENT (effect);
current_prio = _PRIORITY (track_element);
_get_priority_range (GES_CONTAINER (clip), &min_prio, &max_prio);
newindex = newindex + min_prio;
/* We don't change the priority */
if (current_prio == newindex)
return TRUE;
if (newindex > (clip->priv->nb_effects - 1 + min_prio)) {
GST_DEBUG ("You are trying to make %p not a top effect", effect);
return FALSE;
}
if (current_prio > clip->priv->nb_effects + min_prio) {
GST_ERROR ("%p is not a top effect", effect);
return FALSE;
}
GST_DEBUG_OBJECT (clip, "Setting top effect %" GST_PTR_FORMAT "priority: %i",
effect, newindex);
if (current_prio < newindex)
inc = -1;
else
inc = +1;
/* prevent a re-sort of the list whilst we are traversing it! */
clip->priv->prevent_resort = TRUE;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *tmpo = GES_TRACK_ELEMENT (tmp->data);
guint tck_priority = _PRIORITY (tmpo);
if (tmpo == track_element)
continue;
/* only need to change the priority for those between the new and old
* index */
if ((inc == +1 && tck_priority >= newindex && tck_priority < current_prio)
|| (inc == -1 && tck_priority <= newindex
&& tck_priority > current_prio)) {
_set_priority0 (GES_TIMELINE_ELEMENT (tmpo), tck_priority + inc);
}
}
_set_priority0 (GES_TIMELINE_ELEMENT (track_element), newindex);
clip->priv->prevent_resort = FALSE;
_ges_container_sort_children (GES_CONTAINER (clip));
/* height should have stayed the same */
return TRUE;
}
/**
* ges_clip_split:
* @clip: The #GESClip to split
* @position: The timeline position at which to perform the split
*
* Splits a clip at the given timeline position into two clips. The clip
* must already have a #GESClip:layer.
*
* The original clip's #GESTimelineElement:duration is reduced such that
* its end point matches the split position. Then a new clip is created in
* the same layer, whose #GESTimelineElement:start matches the split
* position and #GESTimelineElement:duration will be set such that its end
* point matches the old end point of the original clip. Thus, the two
* clips together will occupy the same positions in the timeline as the
* original clip did.
*
* The children of the new clip will be new copies of the original clip's
* children, so it will share the same sources and use the same
* operations.
*
* The new clip will also have its #GESTimelineElement:in-point set so
* that any internal data will appear in the timeline at the same time.
* Thus, when the timeline is played, the playback of data should
* appear the same. This may be complicated by any additional
* #GESEffect-s that have been placed on the original clip that depend on
* the playback time or change the data consumption rate of sources. This
* method will attempt to translate these effects such that the playback
* appears the same. In such complex situations, you may get a better
* result if you place the clip in a separate sub #GESProject, which only
* contains this clip (and its effects), and in the original layer
* create two neighbouring #GESUriClip-s that reference this sub-project,
* but at a different #GESTimelineElement:in-point.
*
* Returns: (transfer none) (nullable): The newly created clip resulting
* from the splitting @clip, or %NULL if @clip can't be split.
*/
GESClip *
ges_clip_split (GESClip * clip, guint64 position)
{
GList *tmp;
GESClip *new_object;
GstClockTime start, inpoint, duration, old_duration, new_duration;
gdouble media_duration_factor;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
g_return_val_if_fail (clip->priv->layer, NULL);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (position), NULL);
duration = _DURATION (clip);
start = _START (clip);
inpoint = _INPOINT (clip);
if (position >= start + duration || position <= start) {
GST_WARNING_OBJECT (clip, "Can not split %" GST_TIME_FORMAT
" out of boundaries", GST_TIME_ARGS (position));
return NULL;
}
old_duration = position - start;
if (!timeline_tree_can_move_element (timeline_get_tree
(GES_TIMELINE_ELEMENT_TIMELINE (clip)), GES_TIMELINE_ELEMENT (clip),
GES_TIMELINE_ELEMENT_LAYER_PRIORITY (clip),
start, old_duration, NULL)) {
GST_WARNING_OBJECT (clip,
"Can not split %" GES_FORMAT " at %" GST_TIME_FORMAT
" as timeline would be in an illegal" " state.", GES_ARGS (clip),
GST_TIME_ARGS (position));
return NULL;
}
new_duration = duration + start - position;
if (!timeline_tree_can_move_element (timeline_get_tree
(GES_TIMELINE_ELEMENT_TIMELINE (clip)), GES_TIMELINE_ELEMENT (clip),
GES_TIMELINE_ELEMENT_LAYER_PRIORITY (clip), position, new_duration,
NULL)) {
GST_WARNING_OBJECT (clip,
"Can not split %" GES_FORMAT " at %" GST_TIME_FORMAT
" as timeline would end up in an illegal" " state.", GES_ARGS (clip),
GST_TIME_ARGS (position));
return NULL;
}
GST_DEBUG_OBJECT (clip, "Spliting at %" GST_TIME_FORMAT,
GST_TIME_ARGS (position));
/* Create the new Clip */
new_object = GES_CLIP (ges_timeline_element_copy (GES_TIMELINE_ELEMENT (clip),
FALSE));
GST_DEBUG_OBJECT (new_object, "New 'splitted' clip");
/* Set new timing properties on the Clip */
media_duration_factor =
ges_timeline_element_get_media_duration_factor (GES_TIMELINE_ELEMENT
(clip));
_set_start0 (GES_TIMELINE_ELEMENT (new_object), position);
_set_inpoint0 (GES_TIMELINE_ELEMENT (new_object),
inpoint + old_duration * media_duration_factor);
_set_duration0 (GES_TIMELINE_ELEMENT (new_object), new_duration);
_DURATION (clip) = old_duration;
g_object_notify (G_OBJECT (clip), "duration");
/* We do not want the timeline to create again TrackElement-s */
ges_clip_set_moving_from_layer (new_object, TRUE);
ges_layer_add_clip (clip->priv->layer, new_object);
ges_clip_set_moving_from_layer (new_object, FALSE);
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *new_trackelement, *trackelement =
GES_TRACK_ELEMENT (tmp->data);
new_trackelement =
GES_TRACK_ELEMENT (ges_timeline_element_copy (GES_TIMELINE_ELEMENT
(trackelement), FALSE));
if (new_trackelement == NULL) {
GST_WARNING_OBJECT (trackelement, "Could not create a copy");
continue;
}
if (ges_track_element_get_owners (trackelement))
ges_track_element_add_owner (new_trackelement, new_object);
/* FIXME: in-point for non-core track elements should be shifted by
* the split (adding them to the new clip will not set their in-point)
* Handle this once generic time effects are supported in splitting */
ges_container_add (GES_CONTAINER (new_object),
GES_TIMELINE_ELEMENT (new_trackelement));
ges_track_element_copy_properties (GES_TIMELINE_ELEMENT (trackelement),
GES_TIMELINE_ELEMENT (new_trackelement));
/* FIXME: is position - start + inpoint always the correct splitting
* point for control bindings? What coordinate system are control
* bindings given in? */
/* NOTE: control bindings that are not registered in GES are not
* handled */
ges_track_element_copy_bindings (trackelement, new_trackelement,
position - start + inpoint);
}
/* FIXME: The below leads to a *second* notify signal for duration */
ELEMENT_SET_FLAG (clip, GES_TIMELINE_ELEMENT_SET_SIMPLE);
_DURATION (clip) = duration;
_set_duration0 (GES_TIMELINE_ELEMENT (clip), old_duration);
ELEMENT_UNSET_FLAG (clip, GES_TIMELINE_ELEMENT_SET_SIMPLE);
return new_object;
}
/**
* ges_clip_set_supported_formats:
* @clip: A #GESClip
* @supportedformats: The #GESTrackType-s supported by @clip
*
* Sets the #GESClip:supported-formats of the clip. This should normally
* only be called by subclasses, which should be responsible for updating
* its value, rather than the user.
*/
void
ges_clip_set_supported_formats (GESClip * clip, GESTrackType supportedformats)
{
g_return_if_fail (GES_IS_CLIP (clip));
clip->priv->supportedformats = supportedformats;
}
/**
* ges_clip_get_supported_formats:
* @clip: A #GESClip
*
* Gets the #GESClip:supported-formats of the clip.
*
* Returns: The #GESTrackType-s supported by @clip.
*/
GESTrackType
ges_clip_get_supported_formats (GESClip * clip)
{
g_return_val_if_fail (GES_IS_CLIP (clip), GES_TRACK_TYPE_UNKNOWN);
return clip->priv->supportedformats;
}
gboolean
_ripple (GESTimelineElement * element, GstClockTime start)
{
return ges_container_edit (GES_CONTAINER (element), NULL,
ges_timeline_element_get_layer_priority (element),
GES_EDIT_MODE_RIPPLE, GES_EDGE_NONE, start);
}
static gboolean
_ripple_end (GESTimelineElement * element, GstClockTime end)
{
return ges_container_edit (GES_CONTAINER (element), NULL,
ges_timeline_element_get_layer_priority (element),
GES_EDIT_MODE_RIPPLE, GES_EDGE_END, end);
}
gboolean
_roll_start (GESTimelineElement * element, GstClockTime start)
{
return ges_container_edit (GES_CONTAINER (element), NULL,
ges_timeline_element_get_layer_priority (element),
GES_EDIT_MODE_ROLL, GES_EDGE_START, start);
}
gboolean
_roll_end (GESTimelineElement * element, GstClockTime end)
{
return ges_container_edit (GES_CONTAINER (element), NULL,
ges_timeline_element_get_layer_priority (element),
GES_EDIT_MODE_ROLL, GES_EDGE_END, end);
}
gboolean
_trim (GESTimelineElement * element, GstClockTime start)
{
return ges_container_edit (GES_CONTAINER (element), NULL, -1,
GES_EDIT_MODE_TRIM, GES_EDGE_START, start);
}
/**
* ges_clip_add_asset:
* @clip: A #GESClip
* @asset: An asset with #GES_TYPE_TRACK_ELEMENT as its
* #GESAsset:extractable-type
*
* Extracts a #GESTrackElement from an asset and adds it to the clip.
* This can be used to add effects that derive from the asset to the
* clip, but this method is not intended to be used to create the core
* elements of the clip.
*
* Returns: (transfer none)(allow-none): The newly created element, or
* %NULL if an error occurred.
*/
/* FIXME: this is not used elsewhere in the GES library */
GESTrackElement *
ges_clip_add_asset (GESClip * clip, GESAsset * asset)
{
GESTrackElement *element;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
g_return_val_if_fail (GES_IS_ASSET (asset), NULL);
g_return_val_if_fail (g_type_is_a (ges_asset_get_extractable_type
(asset), GES_TYPE_TRACK_ELEMENT), NULL);
element = GES_TRACK_ELEMENT (ges_asset_extract (asset, NULL));
if (!ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (element)))
return NULL;
return element;
}
/**
* ges_clip_find_track_elements:
* @clip: A #GESClip
* @track: (allow-none): The track to search in, or %NULL to search in
* all tracks
* @track_type: The track-type of the track element to search for, or
* #GES_TRACK_TYPE_UNKNOWN to match any track type
* @type: The type of track element to search for, or %G_TYPE_NONE to
* match any type
*
* Finds the #GESTrackElement-s controlled by the clip that match the
* given criteria. If @track is given as %NULL and @track_type is given as
* #GES_TRACK_TYPE_UNKNOWN, then the search will match all elements in any
* track, including those with no track, and of any
* #GESTrackElement:track-type. Otherwise, if @track is not %NULL, but
* @track_type is #GES_TRACK_TYPE_UNKNOWN, then only the track elements in
* @track are searched for. Otherwise, if @track_type is not
* #GES_TRACK_TYPE_UNKNOWN, but @track is %NULL, then only the track
* elements whose #GESTrackElement:track-type matches @track_type are
* searched for. Otherwise, when both are given, the track elements that
* match **either** criteria are searched for. Therefore, if you wish to
* only find elements in a specific track, you should give the track as
* @track, but you should not give the track's #GESTrack:track-type as
* @track_type because this would also select elements from other tracks
* of the same type.
*
* You may also give @type to _further_ restrict the search to track
* elements of the given @type.
*
* Returns: (transfer full) (element-type GESTrackElement): A list of all
* the #GESTrackElement-s controlled by @clip, in @track or of the given
* @track_type, and of the given @type.
*/
GList *
ges_clip_find_track_elements (GESClip * clip, GESTrack * track,
GESTrackType track_type, GType type)
{
GList *tmp;
GESTrackElement *otmp;
GList *ret = NULL;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
g_return_val_if_fail (!(track == NULL && type == G_TYPE_NONE &&
track_type == GES_TRACK_TYPE_UNKNOWN), NULL);
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = g_list_next (tmp)) {
otmp = (GESTrackElement *) tmp->data;
if ((type != G_TYPE_NONE) && !G_TYPE_CHECK_INSTANCE_TYPE (tmp->data, type))
continue;
/* TODO 2.0: an AND condition, using a condition like the above type
* check would have made more sense here. Especially when both
* track != NULL and track_type != GES_TRACK_TYPE_UNKNOWN are given */
if ((track == NULL && track_type == GES_TRACK_TYPE_UNKNOWN) ||
(track != NULL && ges_track_element_get_track (otmp) == track) ||
(track_type != GES_TRACK_TYPE_UNKNOWN
&& ges_track_element_get_track_type (otmp) == track_type))
ret = g_list_append (ret, gst_object_ref (otmp));
}
return ret;
}
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