gstreamer/ges/ges-clip.c
Thibault Saunier 8f4688811f ges: Always check return value of ges_container_add
Making coverity happy

CIDs: 1461460, 1461461, 1461462, 1461463, 1461464, 1461465, 1461466, 1461468,
2020-04-10 11:12:12 -04:00

2367 lines
80 KiB
C

/* 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.
* As a special case, whilst a clip does not yet have any core children,
* its #GESTimelineElement:max-duration may be set to indicate what its
* value will be once they are created.
*
* ## 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;
GESTimeline *copied_timeline;
gboolean prevent_priority_offset_update;
gboolean prevent_resort;
gboolean updating_max_duration;
gboolean prevent_max_duration_update;
gboolean setting_inpoint;
gboolean allow_any_track;
/* The formats supported by this Clip */
GESTrackType supportedformats;
};
enum
{
PROP_0,
PROP_LAYER,
PROP_SUPPORTED_FORMATS,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->asset_type = GES_TYPE_CLIP_ASSET;
}
G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GESClip, ges_clip,
GES_TYPE_CONTAINER, G_ADD_PRIVATE (GESClip)
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE,
ges_extractable_interface_init));
/****************************************************
* Listen to our children *
****************************************************/
#define _IS_CORE_CHILD(child) GES_TRACK_ELEMENT_IS_CORE(child)
#define _IS_TOP_EFFECT(child) \
(!_IS_CORE_CHILD (child) && GES_IS_BASE_EFFECT (child))
#define _IS_CORE_INTERNAL_SOURCE_CHILD(child) \
(_IS_CORE_CHILD (child) \
&& ges_track_element_has_internal_source (GES_TRACK_ELEMENT (child)))
/* @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 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 (!_IS_CORE_INTERNAL_SOURCE_CHILD (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 (_IS_CORE_CHILD (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 (!_IS_CORE_CHILD (child))
return;
_update_max_duration (container);
}
static void
_child_has_internal_source_changed_cb (GESTimelineElement * child,
GParamSpec * pspec, GESContainer * container)
{
/* ignore non-core */
/* if the track element is now registered to have no internal content,
* we don't have to do anything */
if (!_IS_CORE_INTERNAL_SOURCE_CHILD (child))
return;
/* otherwise, we need to make its in-point match ours */
_set_inpoint0 (child, _INPOINT (container));
}
/****************************************************
* Restrict our children *
****************************************************/
static gboolean
_track_contains_core (GESClip * clip, GESTrack * track, gboolean core)
{
GList *tmp;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
if (_IS_CORE_CHILD (child) == core
&& ges_track_element_get_track (child) == track)
return TRUE;
}
return FALSE;
}
gboolean
ges_clip_can_set_track_of_child (GESClip * clip, GESTrackElement * child,
GESTrack * track)
{
GESTrack *current_track = ges_track_element_get_track (child);
if (clip->priv->allow_any_track)
return TRUE;
if (current_track == track)
return TRUE;
if (current_track) {
/* can not remove a core element from a track if a non-core one sits
* above it */
if (_IS_CORE_CHILD (child)
&& _track_contains_core (clip, current_track, FALSE)) {
GST_INFO_OBJECT (clip, "Cannot move the core child %" GES_FORMAT
" to the track %" GST_PTR_FORMAT " because it has non-core "
"siblings above it in its current track %" GST_PTR_FORMAT,
GES_ARGS (child), track, current_track);
return FALSE;
}
/* otherwise can remove */
}
if (track) {
GESTimeline *clip_timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip);
const GESTimeline *track_timeline = ges_track_get_timeline (track);
if (track_timeline == NULL) {
GST_INFO_OBJECT (clip, "Cannot move the child %" GES_FORMAT
" to the track %" GST_PTR_FORMAT " because it is not part "
"of a timeline", GES_ARGS (child), track);
return FALSE;
}
if (track_timeline != clip_timeline) {
GST_INFO_OBJECT (clip, "Cannot move the child %" GES_FORMAT
" to the track %" GST_PTR_FORMAT " because its timeline %"
GST_PTR_FORMAT " does not match the clip's timeline %"
GST_PTR_FORMAT, GES_ARGS (child), track, track_timeline,
clip_timeline);
return FALSE;
}
/* one core child per track, and other children (effects) can only be
* placed in a track that already has a core child */
if (_IS_CORE_CHILD (child)) {
if (_track_contains_core (clip, track, TRUE)) {
GST_INFO_OBJECT (clip, "Cannot move the core child %" GES_FORMAT
" to the track %" GST_PTR_FORMAT " because it contains a "
"core sibling", GES_ARGS (child), track);
return FALSE;
}
} else {
if (!_track_contains_core (clip, track, TRUE)) {
GST_INFO_OBJECT (clip, "Cannot move the non-core child %"
GES_FORMAT " to the track %" GST_PTR_FORMAT " because it "
" does not contain a core sibling", GES_ARGS (child), track);
return FALSE;
}
}
}
return TRUE;
}
/*****************************************************
* *
* 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 (!_IS_CORE_CHILD (child))
return TRUE;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (_IS_CORE_INTERNAL_SOURCE_CHILD (child)
&& 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 (_IS_CORE_INTERNAL_SOURCE_CHILD (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;
gboolean has_core = FALSE;
/* 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 (_IS_CORE_CHILD (child)) {
has_core = TRUE;
if (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 (!has_core) {
/* allow max-duration to be set arbitrarily when we have no
* core children, even though there is no actual minimum max-duration
* when it has no core children */
if (GST_CLOCK_TIME_IS_VALID (maxduration))
GST_INFO_OBJECT (element,
"Allowing max-duration of the clip to be set to %" GST_TIME_FORMAT
" because it has no core children", GST_TIME_ARGS (maxduration));
return TRUE;
}
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);
}
static gboolean
_get_natural_framerate (GESTimelineElement * self, gint * framerate_n,
gint * framerate_d)
{
GESAsset *asset = ges_extractable_get_asset (GES_EXTRACTABLE (self));
if (!asset) {
GST_WARNING_OBJECT (self, "No asset set?");
return FALSE;
}
return ges_clip_asset_get_natural_framerate (GES_CLIP_ASSET (asset),
framerate_n, framerate_d);
}
/****************************************************
* *
* 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;
GESTrack *track;
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (container);
GESClipPrivate *priv = GES_CLIP (container)->priv;
GESAsset *asset, *creator_asset;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (element), FALSE);
if (element->timeline && element->timeline != timeline) {
GST_WARNING_OBJECT (container, "Cannot add %" GES_FORMAT " as a child "
"because its timeline is %" GST_PTR_FORMAT " rather than the "
"clip's timeline %" GST_PTR_FORMAT, GES_ARGS (element),
element->timeline, timeline);
return FALSE;
}
asset = ges_extractable_get_asset (GES_EXTRACTABLE (container));
creator_asset =
ges_track_element_get_creator_asset (GES_TRACK_ELEMENT (element));
if (creator_asset && asset != creator_asset) {
GST_WARNING_OBJECT (container,
"Cannot add the track element %" GES_FORMAT " as a child "
"because it is a core element created by another clip with a "
"different asset to the current clip's asset", GES_ARGS (element));
return FALSE;
}
track = ges_track_element_get_track (GES_TRACK_ELEMENT (element));
if (track && ges_track_get_timeline (track) != timeline) {
/* really, an element in a track should have the same timeline as
* the track, so we would have checked this with the
* element->timeline check. But technically a user could get around
* this, so we double check here. */
GST_WARNING_OBJECT (container, "Cannot add %" GES_FORMAT " as a child "
"because its track %" GST_PTR_FORMAT " is part of the timeline %"
GST_PTR_FORMAT " rather than the clip's timeline %" GST_PTR_FORMAT,
GES_ARGS (element), track, ges_track_get_timeline (track), timeline);
return FALSE;
}
/* NOTE: notifies are currently frozen by ges_container_add */
_get_priority_range (container, &min_prio, &max_prio);
if (creator_asset) {
/* NOTE: Core track elements that are base effects are added like any
* other core elements. In particular, they are *not* added to the
* list of added effects, so we do not increase nb_effects. */
if (track && !priv->allow_any_track
&& _track_contains_core (GES_CLIP (container), track, TRUE)) {
GST_WARNING_OBJECT (container, "Cannot add the core child %" GES_FORMAT
" because it is in the same track %" GST_PTR_FORMAT " as an "
"existing core child", GES_ARGS (element), track);
return FALSE;
}
/* 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) && _IS_TOP_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. */
if (track && !priv->allow_any_track
&& !_track_contains_core (GES_CLIP (container), track, TRUE)) {
GST_WARNING_OBJECT (container, "Cannot add the effect %" GES_FORMAT
" because its track %" GST_PTR_FORMAT " does not contain one "
"of the clip's core children", GES_ARGS (element), track);
return FALSE;
}
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 (_IS_TOP_EFFECT (element))
GST_WARNING_OBJECT (container, "Cannot 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 adding extra effects",
GES_ARGS (element), G_OBJECT_CLASS_NAME (klass));
else if (GES_CLIP_CLASS_CAN_ADD_EFFECTS (klass))
GST_WARNING_OBJECT (container, "Cannot 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, "Cannot 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 (_IS_TOP_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);
}
return TRUE;
}
static void
_child_added (GESContainer * container, GESTimelineElement * element)
{
g_signal_connect (element, "notify::priority",
G_CALLBACK (_child_priority_changed_cb), container);
g_signal_connect (element, "notify::in-point",
G_CALLBACK (_child_inpoint_changed_cb), container);
g_signal_connect (element, "notify::max-duration",
G_CALLBACK (_child_max_duration_changed_cb), container);
g_signal_connect (element, "notify::has-internal-source",
G_CALLBACK (_child_has_internal_source_changed_cb), container);
_child_priority_changed_cb (element, NULL, container);
if (_IS_CORE_CHILD (element))
_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);
if (_IS_CORE_CHILD (element))
_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));
}
/* NOTE: Since this does not change the track of @child, this should
* only be called if it is guaranteed that neither @from_clip nor @to_clip
* will not break the track rules:
* + no more than one core child per track
* + every non-core child must be in the same track as a core child
* NOTE: Since this does not change the creator asset of the child, this
* should only be called for transferring children between clips with the
* same asset.
*/
static void
_transfer_child (GESClip * from_clip, GESClip * to_clip,
GESTrackElement * child)
{
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (to_clip);
/* We need to bump the refcount to avoid the object to be destroyed */
gst_object_ref (child);
/* don't want to change tracks */
ges_timeline_set_moving_track_elements (timeline, TRUE);
ges_container_remove (GES_CONTAINER (from_clip),
GES_TIMELINE_ELEMENT (child));
to_clip->priv->allow_any_track = TRUE;
if (!ges_container_add (GES_CONTAINER (to_clip),
GES_TIMELINE_ELEMENT (child)))
GST_ERROR ("%" GES_FORMAT " could not add child %p while"
" transfering, this should never happen", GES_ARGS (to_clip), child);
to_clip->priv->allow_any_track = FALSE;
ges_timeline_set_moving_track_elements (timeline, FALSE);
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);
}
children = ges_container_get_children (container, FALSE);
/* _add_child will add core elements at the lowest priority and new
* non-core effects at the lowest effect priority, so we need to add
* the highest priority children first to preserve the effect order.
* @children is already ordered by highest priority first */
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);
/* adding to the same layer should not fail when moving */
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 */
/* Note: it is safe to transfer the element whilst not changing tracks
* because all track elements in the same track will stay in the
* same clip */
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 gboolean
_group_test_share_track (GESClip * clip1, GESClip * clip2)
{
GList *tmp1, *tmp2;
GESTrackElement *child1, *child2;
for (tmp1 = GES_CONTAINER_CHILDREN (clip1); tmp1; tmp1 = tmp1->next) {
child1 = tmp1->data;
for (tmp2 = GES_CONTAINER_CHILDREN (clip2); tmp2; tmp2 = tmp2->next) {
child2 = tmp2->data;
if (ges_track_element_get_track (child1)
== ges_track_element_get_track (child2)) {
GST_INFO_OBJECT (clip1, "Cannot group with clip %" GES_FORMAT
" because its child %" GES_FORMAT " shares the same "
"track with our child %" GES_FORMAT, GES_ARGS (clip2),
GES_ARGS (child2), GES_ARGS (child1));
return TRUE;
}
}
}
return FALSE;
}
#define _GROUP_TEST_EQUAL(val, expect, format) \
if (val != expect) { \
GST_INFO_OBJECT (clip, "Cannot group with other clip %" GES_FORMAT \
" because the clip's " #expect " is %" format " rather than the " \
#expect " of the other clip %" format, GES_ARGS (first_clip), val, \
expect); \
return NULL; \
}
static GESContainer *
_group (GList * containers)
{
GESClip *first_clip = NULL;
GESTimeline *timeline;
GESTrackType supported_formats;
GESLayer *layer;
GList *tmp, *tmp2, *tmpclip;
GstClockTime start, inpoint, duration;
GESTimelineElement *element;
GESAsset *asset;
GESContainer *ret = NULL;
if (!containers)
return NULL;
for (tmp = containers; tmp; tmp = tmp->next) {
if (GES_IS_CLIP (tmp->data) == FALSE) {
GST_DEBUG ("Can only work with clips");
return NULL;
}
if (!first_clip) {
first_clip = tmp->data;
element = GES_TIMELINE_ELEMENT (first_clip);
start = element->start;
inpoint = element->inpoint;
duration = element->duration;
timeline = element->timeline;
layer = first_clip->priv->layer;
asset = ges_extractable_get_asset (GES_EXTRACTABLE (first_clip));
}
}
for (tmp = containers; tmp; tmp = tmp->next) {
GESClip *clip;
GESAsset *cmp_asset;
element = GES_TIMELINE_ELEMENT (tmp->data);
clip = GES_CLIP (element);
_GROUP_TEST_EQUAL (element->start, start, G_GUINT64_FORMAT);
_GROUP_TEST_EQUAL (element->duration, duration, G_GUINT64_FORMAT);
_GROUP_TEST_EQUAL (element->inpoint, inpoint, G_GUINT64_FORMAT);
_GROUP_TEST_EQUAL (element->timeline, timeline, GST_PTR_FORMAT);
_GROUP_TEST_EQUAL (clip->priv->layer, layer, GST_PTR_FORMAT);
cmp_asset = ges_extractable_get_asset (GES_EXTRACTABLE (clip));
if (cmp_asset != asset) {
GST_INFO_OBJECT (clip, "Cannot group with other clip %"
GES_FORMAT " because the clip's asset is %s rather than "
" the asset of the other clip %s", GES_ARGS (first_clip),
cmp_asset ? ges_asset_get_id (cmp_asset) : NULL,
asset ? ges_asset_get_id (asset) : NULL);
return NULL;
}
/* make sure we don't share the same track */
for (tmp2 = tmp->next; tmp2; tmp2 = tmp2->next) {
if (_group_test_share_track (clip, tmp2->data))
return NULL;
}
}
/* 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);
/* _add_child will add core elements at the lowest priority and new
* non-core effects at the lowest effect priority, so we need to add
* the highest priority children first to preserve the effect order.
* @children is already ordered by highest priority first.
* Priorities between children in different tracks (as tmpclips are)
* is not important */
for (tmp = children; tmp; tmp = tmp->next) {
GESTrackElement *celement = GES_TRACK_ELEMENT (tmp->data);
/* Note: it is safe to transfer the element whilst not changing
* tracks because the elements from different clips will have
* children in separate tracks. So it should not be possible for
* two core children to appear in the same track */
_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, cclip);
}
ges_clip_set_supported_formats (GES_CLIP (ret), supported_formats);
return ret;
}
void
ges_clip_empty_from_track (GESClip * clip, GESTrack * track)
{
GList *tmp;
if (track == NULL)
return;
/* allow us to remove in any order */
clip->priv->allow_any_track = TRUE;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
if (ges_track_element_get_track (child) == track) {
if (!ges_track_remove_element (track, child))
GST_ERROR_OBJECT (clip, "Failed to remove child %" GES_FORMAT
" from the track %" GST_PTR_FORMAT, GES_ARGS (child), track);
}
}
clip->priv->allow_any_track = FALSE;
}
static GESTrackElement *
_copy_track_element_to (GESTrackElement * orig, GESClip * to_clip,
GstClockTime position)
{
GESTrackElement *copy;
GESTimelineElement *el_copy, *el_orig;
/* 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. */
el_orig = GES_TIMELINE_ELEMENT (orig);
el_copy = ges_timeline_element_copy (el_orig, FALSE);
if (el_copy == NULL)
return NULL;
copy = GES_TRACK_ELEMENT (el_copy);
ges_track_element_copy_properties (el_orig, el_copy);
/* NOTE: control bindings that are not registered in GES are not
* handled */
ges_track_element_copy_bindings (orig, copy, position);
ges_track_element_set_creator_asset (copy,
ges_track_element_get_creator_asset (orig));
return copy;
}
static GESTrackElement *
ges_clip_copy_track_element_into (GESClip * clip, GESTrackElement * orig,
GstClockTime position)
{
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip);
GESTrackElement *copy;
copy = _copy_track_element_to (orig, clip, position);
if (copy == NULL) {
GST_ERROR_OBJECT (clip, "Failed to create a copy of the "
"element %" GES_FORMAT " for the clip", GES_ARGS (orig));
return NULL;
}
gst_object_ref (copy);
ges_timeline_set_moving_track_elements (timeline, TRUE);
if (!ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (copy))) {
GST_ERROR_OBJECT (clip, "Failed to add the copied child track "
"element %" GES_FORMAT " to the clip", GES_ARGS (copy));
ges_timeline_set_moving_track_elements (timeline, FALSE);
gst_object_unref (copy);
return NULL;
}
ges_timeline_set_moving_track_elements (timeline, FALSE);
/* now owned by the clip */
gst_object_unref (copy);
return copy;
}
static void
_deep_copy (GESTimelineElement * element, GESTimelineElement * copy)
{
GList *tmp;
GESClip *self = GES_CLIP (element), *ccopy = GES_CLIP (copy);
GESTrackElement *el, *el_copy;
/* NOTE: this should only be called on a newly created @copy, so
* its copied_track_elements, and copied_layer, should be free to set
* without disposing of the previous values */
for (tmp = GES_CONTAINER_CHILDREN (element); tmp; tmp = tmp->next) {
el = GES_TRACK_ELEMENT (tmp->data);
el_copy = _copy_track_element_to (el, ccopy, GST_CLOCK_TIME_NONE);
if (!el_copy) {
GST_ERROR_OBJECT (element, "Failed to copy the track element %"
GES_FORMAT " for pasting", GES_ARGS (el));
continue;
}
/* owned by copied_track_elements */
gst_object_ref_sink (el_copy);
/* _add_child will add core elements at the lowest priority and new
* non-core effects at the lowest effect priority, so we need to add
* the highest priority children first to preserve the effect order.
* The clip's children are already ordered by highest priority first.
* So we order copied_track_elements in the same way */
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);
ccopy->priv->copied_timeline = self->priv->layer->timeline;
}
static GESTimelineElement *
_paste (GESTimelineElement * element, GESTimelineElement * ref,
GstClockTime paste_position)
{
GList *tmp;
GESClip *self = GES_CLIP (element);
GESLayer *layer = self->priv->copied_layer;
GESClip *nclip = GES_CLIP (ges_timeline_element_copy (element, FALSE));
ges_timeline_element_set_start (GES_TIMELINE_ELEMENT (nclip), paste_position);
/* paste in order of priority (highest first) */
for (tmp = self->priv->copied_track_elements; tmp; tmp = tmp->next)
ges_clip_copy_track_element_into (nclip, tmp->data, GST_CLOCK_TIME_NONE);
if (layer) {
if (layer->timeline != self->priv->copied_timeline) {
GST_WARNING_OBJECT (self, "Cannot be pasted into the layer %"
GST_PTR_FORMAT " because its timeline has changed", layer);
gst_object_ref_sink (nclip);
gst_object_unref (nclip);
return NULL;
}
/* adding the clip to the layer will add it to the tracks, but not
* necessarily the same ones depending on select-tracks-for-object */
if (!ges_layer_add_clip (layer, nclip)) {
GST_INFO ("%" GES_FORMAT " could not be pasted to %" GST_TIME_FORMAT,
GES_ARGS (element), GST_TIME_ARGS (paste_position));
return NULL;
}
}
/* NOTE: self should not be used and be freed after this call, so we can
* leave the freeing of copied_layer and copied_track_elements to the
* dispose method */
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, gst_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_PARAM_EXPLICIT_NOTIFY);
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;
element_class->get_natural_framerate = _get_natural_framerate;
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)
{
self->priv = ges_clip_get_instance_private (self);
}
/**
* 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.
*
* 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.
*
* 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 *tmp, *ret;
GESClipClass *klass;
gboolean already_created = FALSE;
GESAsset *asset;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
if ((clip->priv->supportedformats & type) == 0)
return 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));
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = GES_TRACK_ELEMENT (tmp->data);
if (_IS_CORE_CHILD (child)
&& ges_track_element_get_track_type (child) & type) {
/* assume the core track elements have all been created if we find
* at least one core child with the same type */
already_created = TRUE;
break;
}
}
if (already_created)
return NULL;
ret = klass->create_track_elements (clip, type);
asset = ges_extractable_get_asset (GES_EXTRACTABLE (clip));
for (tmp = ret; tmp; tmp = tmp->next)
ges_track_element_set_creator_asset (tmp->data, asset);
return ret;
}
/*
* 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 = FALSE;
GESLayer *current_layer;
GESTimeline *current_timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip);
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
current_layer = clip->priv->layer;
if (current_layer == layer) {
GST_INFO_OBJECT (clip, "Already in the layer %" GST_PTR_FORMAT, layer);
return TRUE;
}
gst_object_ref (clip);
if (current_layer == NULL) {
GST_DEBUG ("Not moving %p, only adding it to %p", clip, layer);
ret = ges_layer_add_clip (layer, clip);
goto done;
}
ELEMENT_SET_FLAG (clip, GES_CLIP_IS_MOVING);
if (current_timeline != layer->timeline) {
/* make sure we can perform the can_move_element_check in the timeline
* of the layer */
GST_WARNING_OBJECT (layer, "Cannot move clip %" GES_FORMAT " into "
"the layer because its timeline %" GST_PTR_FORMAT " does not "
"match the timeline of the layer %" GST_PTR_FORMAT,
GES_ARGS (clip), current_timeline, layer->timeline);
ret = FALSE;
goto done;
}
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));
goto done;
}
GST_DEBUG_OBJECT (clip, "moving to layer %p, priority: %d", layer,
ges_layer_get_priority (layer));
ret = ges_layer_remove_clip (current_layer, clip);
if (!ret) {
goto done;
}
ret = ges_layer_add_clip (layer, clip);
if (ret) {
g_object_notify_by_pspec (G_OBJECT (clip), properties[PROP_LAYER]);
} else {
/* try and move back into the original layer */
ges_layer_add_clip (current_layer, clip);
}
done:
ELEMENT_UNSET_FLAG (clip, GES_CLIP_IS_MOVING);
gst_object_unref (clip);
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 (_IS_TOP_EFFECT (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 (_IS_CORE_CHILD (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;
GESTimelineElement *element;
GESTimeline *timeline;
GHashTable *track_for_copy;
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);
element = GES_TIMELINE_ELEMENT (clip);
timeline = element->timeline;
duration = element->duration;
start = element->start;
inpoint = element->inpoint;
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 && !timeline_tree_can_move_element (timeline_get_tree
(timeline), element,
ges_timeline_element_get_layer_priority (element),
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 && !timeline_tree_can_move_element (timeline_get_tree
(timeline), element,
ges_timeline_element_get_layer_priority (element),
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 (element, 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 (element);
_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);
/* We do not want the timeline to create again TrackElement-s */
ges_clip_set_moving_from_layer (new_object, TRUE);
/* adding to the same layer should not fail when moving */
ges_layer_add_clip (clip->priv->layer, new_object);
ges_clip_set_moving_from_layer (new_object, FALSE);
/* split binding before duration changes */
track_for_copy = g_hash_table_new_full (NULL, NULL,
gst_object_unref, gst_object_unref);
/* _add_child will add core elements at the lowest priority and new
* non-core effects at the lowest effect priority, so we need to add the
* highest priority children first to preserve the effect order. The
* clip's children are already ordered by highest priority first. */
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *copy, *orig = tmp->data;
GESTrack *track = ges_track_element_get_track (orig);
/* FIXME: is position - start + inpoint always the correct splitting
* point for control bindings? What coordinate system are control
* bindings given in? */
copy = ges_clip_copy_track_element_into (new_object, orig,
position - start + inpoint);
if (copy && track)
g_hash_table_insert (track_for_copy, gst_object_ref (copy),
gst_object_ref (track));
}
ELEMENT_SET_FLAG (clip, GES_TIMELINE_ELEMENT_SET_SIMPLE);
_set_duration0 (GES_TIMELINE_ELEMENT (clip), old_duration);
ELEMENT_UNSET_FLAG (clip, GES_TIMELINE_ELEMENT_SET_SIMPLE);
g_object_notify (G_OBJECT (clip), "duration");
/* add to the track after the duration change so we don't overlap! */
for (tmp = GES_CONTAINER_CHILDREN (new_object); tmp; tmp = tmp->next) {
GESTrackElement *copy = tmp->data;
GESTrack *track = g_hash_table_lookup (track_for_copy, copy);
if (track) {
new_object->priv->allow_any_track = TRUE;
ges_track_add_element (track, copy);
new_object->priv->allow_any_track = FALSE;
}
}
g_hash_table_unref (track_for_copy);
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;
}
/**
* ges_clip_get_timeline_time_from_source_frame:
* @clip: A #GESClip
* @frame_number: The frame number to get the corresponding timestamp in the
* timeline coordinates
* @err: A #GError set on errors
*
* This method allows you to convert a frame number into a #GstClockTime, this
* can be used to either seek to a particular frame in the timeline or to later
* on edit @self with that timestamp.
*
* This method should be use specifically in the case where you want to trim the
* clip to a particular frame.
*
* The returned timestamp is in the global #GESTimeline time coordinates of @self, not
* in the internal time coordinates. In practice, this means that you can not use
* that time to set the clip #GESTimelineElement:in-point but it can be used in
* the timeline editing API, for example as the @position argument of the
* #ges_timeline_element_edit method.
*
* Note that you can get the frame timestamp of a particular clip asset with
* #ges_clip_asset_get_frame_time.
*
* Returns: The timestamp corresponding to @frame_number in the element source
* in the timeline coordinates.
*/
GstClockTime
ges_clip_get_timeline_time_from_source_frame (GESClip * clip,
GESFrameNumber frame_number, GError ** err)
{
GstClockTime frame_ts;
GESClipAsset *asset;
GstClockTimeDiff inpoint_diff;
g_return_val_if_fail (GES_IS_CLIP (clip), GST_CLOCK_TIME_NONE);
g_return_val_if_fail (!err || !*err, GST_CLOCK_TIME_NONE);
if (!GES_FRAME_NUMBER_IS_VALID (frame_number))
return GST_CLOCK_TIME_NONE;
asset = GES_CLIP_ASSET (ges_extractable_get_asset (GES_EXTRACTABLE (clip)));
frame_ts = ges_clip_asset_get_frame_time (asset, frame_number);
if (!GST_CLOCK_TIME_IS_VALID (frame_ts))
return GST_CLOCK_TIME_NONE;
inpoint_diff = GST_CLOCK_DIFF (frame_ts, GES_TIMELINE_ELEMENT_INPOINT (clip));
if (GST_CLOCK_DIFF (inpoint_diff, _START (clip)) < 0) {
g_set_error (err, GES_ERROR, GES_ERROR_INVALID_FRAME_NUMBER,
"Requested frame %" G_GINT64_FORMAT
" would be outside the timeline.", frame_number);
return GST_CLOCK_TIME_NONE;
}
return GST_CLOCK_DIFF (inpoint_diff, _START (clip));
}
/**
* ges_clip_add_child_to_track:
* @clip: A #GESClip
* @child: A child of @clip
* @track: The track to add @child to
* @err: Return location for an error
*
* Adds the track element child of the clip to a specific track.
*
* If the given child is already in another track, this will create a copy
* of the child, add it to the clip, and add this copy to the track.
*
* You should only call this whilst a clip is part of a #GESTimeline, and
* for tracks that are in the same timeline.
*
* This method is an alternative to using the
* #GESTimeline::select-tracks-for-object signal, but can be used to
* complement it when, say, you wish to copy a clip's children from one
* track into a new one.
*
* When the child is a core child, it must be added to a track that does
* not already contain another core child of the same clip. If it is not a
* core child (an additional effect), then it must be added to a track
* that already contains one of the core children of the same clip.
*
* This method can also fail if the adding the track element to the track
* would break a configuration rule of the corresponding #GESTimeline,
* such as causing three sources to overlap at a single time, or causing
* a source to completely overlap another in the same track.
*
* Note that @err will not always be set upon failure.
*
* Returns: (transfer none): The element that was added to @track, either
* @child or a copy of child, or %NULL if the element could not be added.
*/
GESTrackElement *
ges_clip_add_child_to_track (GESClip * clip, GESTrackElement * child,
GESTrack * track, GError ** err)
{
GESTimeline *timeline;
GESTrackElement *el;
GESTrack *current_track;
g_return_val_if_fail (GES_IS_CLIP (clip), NULL);
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (child), NULL);
g_return_val_if_fail (GES_IS_TRACK (track), NULL);
g_return_val_if_fail (!err || !*err, NULL);
timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip);
if (!g_list_find (GES_CONTAINER_CHILDREN (clip), child)) {
GST_WARNING_OBJECT (clip, "The track element %" GES_FORMAT " is not "
"a child of the clip", GES_ARGS (child));
return NULL;
}
if (!timeline) {
GST_WARNING_OBJECT (clip, "Cannot add children to tracks unless "
"the clip is part of a timeline");
return NULL;
}
if (timeline != ges_track_get_timeline (track)) {
GST_WARNING_OBJECT (clip, "Cannot add the children to the track %"
GST_PTR_FORMAT " because its timeline is %" GST_PTR_FORMAT
" rather than that of the clip %" GST_PTR_FORMAT,
track, ges_track_get_timeline (track), timeline);
return NULL;
}
current_track = ges_track_element_get_track (child);
if (current_track == track) {
GST_WARNING_OBJECT (clip, "Child %s" GES_FORMAT " is already in the "
"track %" GST_PTR_FORMAT, GES_ARGS (child), track);
return NULL;
}
/* copy if the element is already in a track */
if (current_track) {
el = ges_clip_copy_track_element_into (clip, child, GST_CLOCK_TIME_NONE);
if (!el) {
GST_ERROR_OBJECT (clip, "Could not add a copy of the track element %"
GES_FORMAT " to the clip so cannot add it to the track %"
GST_PTR_FORMAT, GES_ARGS (child), track);
return NULL;
}
if (_IS_TOP_EFFECT (child)) {
/* add at next lowest priority */
ges_clip_set_top_effect_index (clip, GES_BASE_EFFECT (el),
ges_clip_get_top_effect_index (clip, GES_BASE_EFFECT (child)) + 1);
}
} else {
el = child;
}
/* FIXME: set error if can not be added to track:
* Either breaks the track rules for the clip, or the timeline
* configuration rules */
if (!ges_track_add_element (track, el)) {
GST_WARNING_OBJECT (clip, "Could not add the track element %"
GES_FORMAT " to the track %" GST_PTR_FORMAT, GES_ARGS (el), track);
if (el != child)
ges_container_remove (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (el));
return NULL;
}
if (GES_IS_SOURCE (el))
timeline_tree_create_transitions (timeline_get_tree (timeline),
ges_timeline_find_auto_transition);
return el;
}