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gstreamer/subprojects/gst-editing-services/ges/ges-clip.c

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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.
*
* ## Core Children
*
* In more detail, clips will usually have some *core* #GESTrackElement
* children, which are created by the clip when it is added to a layer in
* a timeline. The type and form of these core children will depend on the
* clip's subclass. You can use ges_track_element_is_core() to determine
* whether a track element is considered such a core track element. Note,
* if a core track element is part of a clip, it will always be treated as
* a core *child* of the clip. You can connect to the
* #GESContainer::child-added signal to be notified of their creation.
*
* When a child is added to a clip, the timeline will select its tracks
* using #GESTimeline::select-tracks-for-object. Note that it may be the
* case that the child will still have no set #GESTrackElement:track
* after this process. For example, if the timeline does not have a track
* of the corresponding #GESTrack:track-type. A clip can safely contain
* such children, which may have their track set later, although they will
* play no functioning role in the timeline in the meantime.
*
* If a clip may create track elements with various
* #GESTrackElement:track-type(s), such as a #GESUriClip, but you only
* want it to create a subset of these types, you should set the
* #GESClip:supported-formats of the clip to the subset of types. This
* should be done *before* adding the clip to a layer.
*
* If a clip will produce several core elements of the same
* #GESTrackElement:track-type, you should connect to the timeline's
* #GESTimeline::select-tracks-for-object signal to coordinate which
* tracks each element should land in. Note, no two core children within a
* clip can share the same #GESTrack, so you should not select the same
* track for two separate core children. Provided you stick to this rule,
* it is still safe to select several tracks for the same core child, the
* core child will be copied into the additional tracks. You can manually
* add the child to more tracks later using ges_clip_add_child_to_track().
* If you do not wish to use a core child, you can always select no track.
*
* The #GESTimelineElement:in-point of the clip will control the
* #GESTimelineElement:in-point of its core children 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 core 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 #GESBaseEffectClip) 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_clip_add_top_effect(), 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().
*
* Tracks are selected for top effects in the same way as core children.
* If you add a top effect to a clip before it is part of a timeline, and
* later add the clip to a timeline, the track selection for the top
* effects will occur just after the track selection for the core
* children. If you add a top effect to a clip that is already part of a
* timeline, the track selection will occur immediately. Since a top
* effect must be applied on top of a core child, if you use
* #GESTimeline::select-tracks-for-object, you should ensure that the
* added effects are destined for a #GESTrack that already contains a core
* child.
*
* In addition, if the core child in the track is not
* #GESTrackElement:active, then neither can any of its effects be
* #GESTrackElement:active. Therefore, if a core child is made in-active,
* all of the additional effects in the same track will also become
* in-active. Similarly, if an effect is set to be active, then the core
* child will also become active, but other effects will be left alone.
* Finally, if an active effect is added to the track of an in-active core
* child, it will become in-active as well. Note, in contrast, setting a
* core child to be active, or an effect to be in-active will *not* change
* the other children in the same track.
*
* ### Time Effects
*
* Some effects also change the timing of their data (see #GESBaseEffect
* for what counts as a time effect). Note that a #GESBaseEffectClip will
* refuse time effects, but a #GESSource will allow them.
*
* When added to a clip, time effects may adjust the timing of other
* children in the same track. Similarly, when changing the order of
* effects, making them (in)-active, setting their time property values
* or removing time effects. These can cause the #GESClip:duration-limit
* to change in value. However, if such an operation would ever cause the
* #GESTimelineElement:duration to shrink such that a clip's #GESSource is
* totally overlapped in the timeline, the operation would be prevented.
* Note that the same can happen when adding non-time effects with a
* finite #GESTimelineElement:max-duration.
*
* Therefore, when working with time effects, you should -- more so than
* usual -- not assume that setting the properties of the clip's children
* will succeed. In particular, you should use
* ges_timeline_element_set_child_property_full() when setting the time
* properties.
*
* If you wish to preserve the *internal* duration of a source in a clip
* during these time effect operations, you can do something like the
* following.
*
* ```c
* void
* do_time_effect_change (GESClip * clip)
* {
* GList *tmp, *children;
* GESTrackElement *source;
* GstClockTime source_outpoint;
* GstClockTime new_end;
* GError *error = NULL;
*
* // choose some active source in a track to preserve the internal
* // duration of
* source = ges_clip_get_track_element (clip, NULL, GES_TYPE_SOURCE);
*
* // note its current internal end time
* source_outpoint = ges_clip_get_internal_time_from_timeline_time (
* clip, source, GES_TIMELINE_ELEMENT_END (clip), NULL);
*
* // handle invalid out-point
*
* // stop the children's control sources from clamping when their
* // out-point changes with a change in the time effects
* children = ges_container_get_children (GES_CONTAINER (clip), FALSE);
*
* for (tmp = children; tmp; tmp = tmp->next)
* ges_track_element_set_auto_clamp_control_source (tmp->data, FALSE);
*
* // add time effect, or set their children properties, or move them around
* ...
* // user can make sure that if a time effect changes one source, we should
* // also change the time effect for another source. E.g. if
* // "GstVideorate::rate" is set to 2.0, we also set "GstPitch::rate" to
* // 2.0
*
* // Note the duration of the clip may have already changed if the
* // duration-limit of the clip dropped below its current value
*
* new_end = ges_clip_get_timeline_time_from_internal_time (
* clip, source, source_outpoint, &error);
* // handle error
*
* if (!ges_timeline_elemnet_edit_full (GES_TIMELINE_ELEMENT (clip),
* -1, GES_EDIT_MODE_TRIM, GES_EDGE_END, new_end, &error))
* // handle error
*
* for (tmp = children; tmp; tmp = tmp->next)
* ges_track_element_set_auto_clamp_control_source (tmp->data, TRUE);
*
* g_list_free_full (children, gst_object_unref);
* gst_object_unref (source);
* }
* ```
*/
#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 void _compute_height (GESContainer * container);
static GstClockTime _convert_core_time (GESClip * clip, GstClockTime time,
gboolean to_timeline, gboolean * no_core, GError ** error);
struct _GESClipPrivate
{
/*< public > */
GESLayer *layer;
/*< private > */
guint nb_effects;
GList *copied_track_elements;
GESLayer *copied_layer;
GESTimeline *copied_timeline;
gboolean prevent_resort;
gboolean updating_max_duration;
gboolean setting_max_duration;
gboolean setting_inpoint;
gboolean setting_priority;
gboolean setting_active;
gboolean allow_any_track;
/* The formats supported by this Clip */
GESTrackType supportedformats;
GstClockTime duration_limit;
gboolean prevent_duration_limit_update;
gboolean prevent_children_outpoint_update;
gboolean allow_any_remove;
gboolean use_effect_priority;
guint32 effect_priority;
GError *add_error;
GError *remove_error;
};
enum
{
PROP_0,
PROP_LAYER,
PROP_SUPPORTED_FORMATS,
PROP_DURATION_LIMIT,
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 *
* and restrict them *
* *
****************************************************/
#define _IS_CORE_CHILD(child) \
ges_track_element_is_core (GES_TRACK_ELEMENT (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)))
#define _MIN_CLOCK_TIME(a, b) \
(GST_CLOCK_TIME_IS_VALID (a) ? \
(GST_CLOCK_TIME_IS_VALID (b) ? MIN (a, b) : a) : b) \
/****************************************************
* duration-limit *
****************************************************/
typedef struct _DurationLimitData
{
GESTrackElement *child;
GESTrack *track;
guint32 priority;
GstClockTime max_duration;
GstClockTime inpoint;
gboolean active;
GHashTable *time_property_values;
} DurationLimitData;
static DurationLimitData *
_duration_limit_data_new (GESTrackElement * child)
{
GESTrack *track = ges_track_element_get_track (child);
DurationLimitData *data = g_new0 (DurationLimitData, 1);
data->child = gst_object_ref (child);
data->track = track ? gst_object_ref (track) : NULL;
data->inpoint = _INPOINT (child);
data->max_duration = _MAXDURATION (child);
data->priority = _PRIORITY (child);
data->active = ges_track_element_is_active (child);
if (GES_IS_TIME_EFFECT (child))
data->time_property_values =
ges_base_effect_get_time_property_values (GES_BASE_EFFECT (child));
return data;
}
static void
_duration_limit_data_free (gpointer data_p)
{
DurationLimitData *data = data_p;
gst_clear_object (&data->track);
gst_clear_object (&data->child);
if (data->time_property_values)
g_hash_table_unref (data->time_property_values);
g_free (data);
}
static GList *
_duration_limit_data_list (GESClip * clip)
{
GList *tmp, *list = NULL;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next)
list = g_list_prepend (list, _duration_limit_data_new (tmp->data));
return list;
}
/* transfer-full of data */
static GList *
_duration_limit_data_list_with_data (GESClip * clip, DurationLimitData * data)
{
GList *tmp, *list = g_list_append (NULL, data);
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
if (data->child == child)
continue;
list = g_list_prepend (list, _duration_limit_data_new (child));
}
return list;
}
static gint
_cmp_duration_limit_data_by_track_then_priority (gconstpointer a_p,
gconstpointer b_p)
{
const DurationLimitData *a = a_p, *b = b_p;
if (a->track < b->track)
return -1;
else if (a->track > b->track)
return 1;
/* if higher priority (numerically lower) place later */
if (a->priority < b->priority)
return 1;
else if (a->priority > b->priority)
return -1;
return 0;
}
#define _INTERNAL_LIMIT(data) \
((data->active && GST_CLOCK_TIME_IS_VALID (data->max_duration)) ? \
data->max_duration - data->inpoint : GST_CLOCK_TIME_NONE)
static GstClockTime
_calculate_track_duration_limit (GESClip * self, GList * start, GList * end)
{
GList *tmp;
DurationLimitData *data = start->data;
GstClockTime track_limit;
/* convert source-duration to timeline-duration
* E.g. consider the following stack
*
* *=============================*
* | source |
* | in-point = 5 |
* | max-duration = 20 |
* *=============================*
* 5 10 15 20 (internal coordinates)
*
* duration-limit = 15 because max-duration - in-point = 15
*
* 0 5 10 15
* *=============================*
* | time-effect | | sink_to_source
* | rate = 0.5 | v / 0.5
* *=============================*
* 0 10 20 30
*
* duration-limit = 30 because rate effect can make it last longer
*
* 13 23 33 (internal coordinates)
* *===================*
* |effect-with-source |
* | in-point = 13 |
* | max-duration = 33 |
* *===================*
* 13 23 33 (internal coordinates)
*
* duration-limit = 20 because effect-with-source cannot cover 30
*
* 0 10 20
* *===================*
* | time-effect | | sink_to_source
* | rate = 2.0 | v / 2.0
* *===================*
* 0 5 10
*
* duration-limit = 10 because rate effect uses up twice as much
*
* -----------------------------------------------timeline
*/
while (!_IS_CORE_CHILD (data->child)) {
GST_WARNING_OBJECT (self, "Child %" GES_FORMAT " has a lower "
"priority than the core child in the same track. Ignoring.",
GES_ARGS (data->child));
start = start->next;
if (start == end) {
GST_ERROR_OBJECT (self, "Track %" GST_PTR_FORMAT " is missing a "
"core child", data->track);
return GST_CLOCK_TIME_NONE;
}
data = start->data;
}
track_limit = _INTERNAL_LIMIT (data);
for (tmp = start->next; tmp != end; tmp = tmp->next) {
data = tmp->data;
if (GES_IS_TIME_EFFECT (data->child)) {
GESBaseEffect *effect = GES_BASE_EFFECT (data->child);
if (data->inpoint)
GST_ERROR_OBJECT (self, "Did not expect an in-point to be set "
"for the time effect %" GES_FORMAT, GES_ARGS (effect));
if (GST_CLOCK_TIME_IS_VALID (data->max_duration))
GST_ERROR_OBJECT (self, "Did not expect a max-duration to be set "
"for the time effect %" GES_FORMAT, GES_ARGS (effect));
if (data->active) {
/* for the time effect, the minimum time it will receive is 0
* (it should map 0 -> 0), and the maximum time will be track_limit */
track_limit = ges_base_effect_translate_sink_to_source_time (effect,
track_limit, data->time_property_values);
}
} else {
GstClockTime el_limit = _INTERNAL_LIMIT (data);
track_limit = _MIN_CLOCK_TIME (track_limit, el_limit);
}
}
GST_LOG_OBJECT (self, "Track duration-limit for track %" GST_PTR_FORMAT
" is %" GST_TIME_FORMAT, data->track, GST_TIME_ARGS (track_limit));
return track_limit;
}
/* transfer-full of child_data */
static GstClockTime
_calculate_duration_limit (GESClip * self, GList * child_data)
{
GstClockTime limit = GST_CLOCK_TIME_NONE;
GList *start, *end;
child_data = g_list_sort (child_data,
_cmp_duration_limit_data_by_track_then_priority);
start = child_data;
while (start) {
/* we have the first element in the track, of the lowest priority, and
* work our way up from here */
GESTrack *track = ((DurationLimitData *) (start->data))->track;
end = start;
do {
end = end->next;
} while (end && ((DurationLimitData *) (end->data))->track == track);
if (track) {
GstClockTime track_limit =
_calculate_track_duration_limit (self, start, end);
limit = _MIN_CLOCK_TIME (limit, track_limit);
}
start = end;
}
GST_LOG_OBJECT (self, "calculated duration-limit for the clip is %"
GST_TIME_FORMAT, GST_TIME_ARGS (limit));
g_list_free_full (child_data, _duration_limit_data_free);
return limit;
}
static void
_update_children_outpoints (GESClip * self)
{
GList *tmp;
if (self->priv->prevent_children_outpoint_update)
return;
for (tmp = GES_CONTAINER_CHILDREN (self); tmp; tmp = tmp->next) {
ges_track_element_update_outpoint (tmp->data);
}
}
static void
_update_duration_limit (GESClip * self)
{
GstClockTime duration_limit;
if (self->priv->prevent_duration_limit_update)
return;
duration_limit = _calculate_duration_limit (self,
_duration_limit_data_list (self));
if (duration_limit != self->priv->duration_limit) {
GESTimelineElement *element = GES_TIMELINE_ELEMENT (self);
self->priv->duration_limit = duration_limit;
GST_INFO_OBJECT (self, "duration-limit for the clip is %"
GST_TIME_FORMAT, GST_TIME_ARGS (duration_limit));
if (GES_CLOCK_TIME_IS_LESS (duration_limit, element->duration)
&& !GES_TIMELINE_ELEMENT_BEING_EDITED (self)) {
gboolean res;
GST_INFO_OBJECT (self, "Automatically reducing duration to %"
GST_TIME_FORMAT " to match the new duration-limit because "
"the current duration %" GST_TIME_FORMAT " exceeds it",
GST_TIME_ARGS (duration_limit), GST_TIME_ARGS (element->duration));
/* trim end with no snapping */
if (element->timeline)
res = timeline_tree_trim (timeline_get_tree (element->timeline),
element, 0, GST_CLOCK_DIFF (duration_limit, element->duration),
GES_EDGE_END, 0, NULL);
else
res = ges_timeline_element_set_duration (element, duration_limit);
if (!res)
GST_ERROR_OBJECT (self, "Could not reduce the duration of the "
"clip to below its duration-limit of %" GST_TIME_FORMAT,
GST_TIME_ARGS (duration_limit));
}
/* notify after the auto-change in duration to allow the user to set
* the duration in response to the change in their callbacks */
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_DURATION_LIMIT]);
}
}
/* transfer full of child_data */
static gboolean
_can_update_duration_limit (GESClip * self, GList * child_data, GError ** error)
{
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (self);
GstClockTime duration = _calculate_duration_limit (self, child_data);
GESTimelineElement *element = GES_TIMELINE_ELEMENT (self);
if (GES_CLOCK_TIME_IS_LESS (duration, element->duration)) {
/* NOTE: timeline would normally not be NULL at this point */
if (timeline
&& !timeline_tree_can_move_element (timeline_get_tree (timeline),
element, ges_timeline_element_get_layer_priority (element),
element->start, duration, error)) {
return FALSE;
}
}
return TRUE;
}
/****************************************************
* priority *
****************************************************/
/* @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));
}
gboolean
ges_clip_can_set_priority_of_child (GESClip * clip, GESTrackElement * child,
guint32 priority, GError ** error)
{
GList *child_data;
DurationLimitData *data;
if (clip->priv->setting_priority)
return TRUE;
data = _duration_limit_data_new (child);
data->priority = priority;
child_data = _duration_limit_data_list_with_data (clip, data);
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot move the child %" GES_FORMAT " from "
"priority %" G_GUINT32_FORMAT " to %" G_GUINT32_FORMAT " because "
"the duration-limit cannot be adjusted", GES_ARGS (child),
_PRIORITY (child), priority);
return FALSE;
}
return TRUE;
}
static void
_child_priority_changed (GESContainer * container, GESTimelineElement * child)
{
/* we do not change the rest of the clip in response to a change in
* the child priority */
GST_DEBUG_OBJECT (container, "TimelineElement %" GES_FORMAT
" priority changed to %u", GES_ARGS (child), _PRIORITY (child));
if (!(GES_CLIP (container))->priv->prevent_resort) {
_ges_container_sort_children (container);
_compute_height (container);
}
}
/****************************************************
* in-point *
****************************************************/
GstClockTime
ges_clip_duration_limit_with_new_children_inpoints (GESClip * clip,
GHashTable * child_inpoints)
{
GHashTableIter iter;
gpointer key, value;
GList *child_data = NULL;
g_hash_table_iter_init (&iter, child_inpoints);
while (g_hash_table_iter_next (&iter, &key, &value)) {
GESTrackElement *child = key;
GstClockTime *inpoint_p = value;
DurationLimitData *data = _duration_limit_data_new (child);
data->inpoint = *inpoint_p;
child_data = g_list_prepend (child_data, data);
}
return _calculate_duration_limit (clip, child_data);
}
static gboolean
_can_set_inpoint_of_core_children (GESClip * clip, GstClockTime inpoint,
GError ** error)
{
GList *tmp;
GList *child_data = NULL;
if (GES_TIMELINE_ELEMENT_BEING_EDITED (clip))
return TRUE;
/* setting the in-point of a core child will shift the in-point of all
* core children with an internal source */
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
DurationLimitData *data =
_duration_limit_data_new (GES_TRACK_ELEMENT (child));
if (_IS_CORE_INTERNAL_SOURCE_CHILD (child)) {
if (GES_CLOCK_TIME_IS_LESS (child->maxduration, inpoint)) {
GST_INFO_OBJECT (clip, "Cannot set the in-point from %"
GST_TIME_FORMAT " to %" GST_TIME_FORMAT " because it would "
"cause the in-point of its core child %" GES_FORMAT
" to exceed its max-duration", GST_TIME_ARGS (_INPOINT (clip)),
GST_TIME_ARGS (inpoint), GES_ARGS (child));
g_set_error (error, GES_ERROR, GES_ERROR_NOT_ENOUGH_INTERNAL_CONTENT,
"Cannot set the in-point of \"%s\" to %" GST_TIME_FORMAT
" because it would exceed the max-duration of %" GST_TIME_FORMAT
" for the child \"%s\"", GES_TIMELINE_ELEMENT_NAME (clip),
GST_TIME_ARGS (inpoint), GST_TIME_ARGS (child->maxduration),
child->name);
_duration_limit_data_free (data);
g_list_free_full (child_data, _duration_limit_data_free);
return FALSE;
}
data->inpoint = inpoint;
}
child_data = g_list_prepend (child_data, data);
}
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot set the in-point from %" GST_TIME_FORMAT
" to %" GST_TIME_FORMAT " because the duration-limit cannot be "
"adjusted", GST_TIME_ARGS (_INPOINT (clip)), GST_TIME_ARGS (inpoint));
return FALSE;
}
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, GESTrackElement * child,
GstClockTime inpoint, GError ** error)
{
/* don't bother checking if we are setting the value */
if (clip->priv->setting_inpoint)
return TRUE;
if (GES_TIMELINE_ELEMENT_BEING_EDITED (child))
return TRUE;
if (!_IS_CORE_CHILD (child)) {
/* no other sibling will move */
GList *child_data;
DurationLimitData *data = _duration_limit_data_new (child);
data->inpoint = inpoint;
child_data = _duration_limit_data_list_with_data (clip, data);
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot set the in-point of non-core child %"
GES_FORMAT " from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
" because the duration-limit cannot be adjusted", GES_ARGS (child),
GST_TIME_ARGS (_INPOINT (child)), GST_TIME_ARGS (inpoint));
return FALSE;
}
return TRUE;
}
/* setting the in-point of a core child will shift the in-point of all
* core children with an internal source */
return _can_set_inpoint_of_core_children (clip, inpoint, error);
}
/* returns TRUE if duration-limit needs to be updated */
static gboolean
_child_inpoint_changed (GESClip * self, GESTimelineElement * child)
{
if (self->priv->setting_inpoint)
return FALSE;
/* if we have a non-core child, then we do not need the in-point of the
* clip to change. Similarly, if the track element is core but has no
* internal content, then this means its in-point has been set (back) to
* 0, which means we do not need to update the in-point of the clip. */
if (!_IS_CORE_INTERNAL_SOURCE_CHILD (child))
return TRUE;
/* if setting the in-point of the clip, this will handle the change in
* the duration-limit */
/* 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 (self), child->inpoint);
return FALSE;
}
/****************************************************
* max-duration *
****************************************************/
static void
_update_max_duration (GESContainer * container)
{
GList *tmp;
GstClockTime min = GST_CLOCK_TIME_NONE;
GESClipPrivate *priv = GES_CLIP (container)->priv;
if (priv->setting_max_duration)
return;
for (tmp = container->children; tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (_IS_CORE_CHILD (child))
min = _MIN_CLOCK_TIME (min, child->maxduration);
}
priv->updating_max_duration = TRUE;
ges_timeline_element_set_max_duration (GES_TIMELINE_ELEMENT (container), min);
priv->updating_max_duration = FALSE;
}
gboolean
ges_clip_can_set_max_duration_of_child (GESClip * clip, GESTrackElement * child,
GstClockTime max_duration, GError ** error)
{
GList *child_data;
DurationLimitData *data;
if (clip->priv->setting_max_duration)
return TRUE;
data = _duration_limit_data_new (child);
data->max_duration = max_duration;
child_data = _duration_limit_data_list_with_data (clip, data);
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot set the max-duration of child %"
GES_FORMAT " from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT
" because the duration-limit cannot be adjusted", GES_ARGS (child),
GST_TIME_ARGS (_MAXDURATION (child)), GST_TIME_ARGS (max_duration));
return FALSE;
}
return TRUE;
}
gboolean
ges_clip_can_set_max_duration_of_all_core (GESClip * clip,
GstClockTime max_duration, GError ** error)
{
GList *tmp;
GList *child_data = NULL;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
DurationLimitData *data =
_duration_limit_data_new (GES_TRACK_ELEMENT (child));
if (_IS_CORE_CHILD (child)) {
/* don't check that it has an internal-source, since we are assuming
* we will have one if the max-duration is valid */
if (GES_CLOCK_TIME_IS_LESS (max_duration, child->inpoint)) {
GST_INFO_OBJECT (clip, "Cannot set the max-duration from %"
GST_TIME_FORMAT " to %" GST_TIME_FORMAT " because it would "
"cause the in-point of its core child %" GES_FORMAT
" to exceed its max-duration",
GST_TIME_ARGS (child->maxduration),
GST_TIME_ARGS (max_duration), GES_ARGS (child));
g_set_error (error, GES_ERROR, GES_ERROR_NOT_ENOUGH_INTERNAL_CONTENT,
"Cannot set the max-duration of the child \"%s\" under the "
"clip \"%s\" to %" GST_TIME_FORMAT " because it would be "
"below the in-point of %" GST_TIME_FORMAT " of the child",
child->name, GES_TIMELINE_ELEMENT_NAME (clip),
GST_TIME_ARGS (max_duration), GST_TIME_ARGS (child->inpoint));
_duration_limit_data_free (data);
g_list_free_full (child_data, _duration_limit_data_free);
return FALSE;
}
data->max_duration = max_duration;
}
child_data = g_list_prepend (child_data, data);
}
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot set the max-duration of the core "
"children to %" GST_TIME_FORMAT " because the duration-limit "
"cannot be adjusted", GST_TIME_ARGS (max_duration));
return FALSE;
}
return TRUE;
}
static void
_child_max_duration_changed (GESContainer * container,
GESTimelineElement * child)
{
/* ignore non-core */
if (!_IS_CORE_CHILD (child))
return;
_update_max_duration (container);
}
/****************************************************
* has-internal-source *
****************************************************/
static void
_child_has_internal_source_changed (GESClip * self, GESTimelineElement * child)
{
/* ignore non-core */
/* if the track element is now registered to have no internal content,
* we don't have to do anything
* Note that the change in max-duration and in-point will already trigger
* a change in the duration-limit, which can only increase since the
* max-duration is now GST_CLOCK_TIME_NONE */
if (!_IS_CORE_INTERNAL_SOURCE_CHILD (child))
return;
/* otherwise, we need to make its in-point match ours
* Note that the duration-limit will be GST_CLOCK_TIME_NONE, so this
* should not change the duration-limit */
_set_inpoint0 (child, _INPOINT (self));
}
/****************************************************
* active *
****************************************************/
gboolean
ges_clip_can_set_active_of_child (GESClip * clip, GESTrackElement * child,
gboolean active, GError ** error)
{
GESTrack *track = ges_track_element_get_track (child);
gboolean is_core = _IS_CORE_CHILD (child);
GList *child_data = NULL;
DurationLimitData *data;
if (clip->priv->setting_active)
return TRUE;
/* We want to ensure that each active non-core element has a
* corresponding active core element in the same track */
if (!track || is_core == active) {
/* only the one child will change */
data = _duration_limit_data_new (child);
data->active = active;
child_data = _duration_limit_data_list_with_data (clip, data);
} else {
GList *tmp;
/* If we are core, make all the non-core elements in-active
* If we are non-core, make the core element active */
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *sibling = tmp->data;
data = _duration_limit_data_new (sibling);
if (sibling == child)
data->active = active;
if (ges_track_element_get_track (sibling) == track
&& _IS_CORE_CHILD (sibling) != is_core
&& ges_track_element_is_active (sibling) != active)
data->active = active;
child_data = g_list_prepend (child_data, data);
}
}
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot set the active of child %" GES_FORMAT
" from %i to %i because the duration-limit cannot be adjusted",
GES_ARGS (child), ges_track_element_is_active (child), active);
return FALSE;
}
return TRUE;
}
static void
_child_active_changed (GESClip * self, GESTrackElement * child)
{
GList *tmp;
GESTrack *track = ges_track_element_get_track (child);
gboolean active = ges_track_element_is_active (child);
gboolean is_core = _IS_CORE_CHILD (child);
gboolean prev_prevent = self->priv->prevent_duration_limit_update;
gboolean prev_prevent_outpoint = self->priv->prevent_children_outpoint_update;
/* We want to ensure that each active non-core element has a
* corresponding active core element in the same track */
if (self->priv->setting_active || !track || is_core == active)
return;
self->priv->setting_active = TRUE;
self->priv->prevent_duration_limit_update = TRUE;
self->priv->prevent_children_outpoint_update = TRUE;
/* If we are core, make all the non-core elements in-active
* If we are non-core, make the core element active (should only be one) */
for (tmp = GES_CONTAINER_CHILDREN (self); tmp; tmp = tmp->next) {
GESTrackElement *sibling = tmp->data;
if (ges_track_element_get_track (sibling) == track
&& _IS_CORE_CHILD (sibling) != is_core
&& ges_track_element_is_active (sibling) != active) {
GST_INFO_OBJECT (self, "Setting active to %i for child %" GES_FORMAT
" since the sibling %" GES_FORMAT " in the same track %"
GST_PTR_FORMAT " has been set to %i", active, GES_ARGS (sibling),
GES_ARGS (child), track, active);
if (!ges_track_element_set_active (sibling, active))
GST_ERROR_OBJECT (self, "Failed to set active for child %"
GES_FORMAT, GES_ARGS (sibling));
}
}
self->priv->setting_active = FALSE;
self->priv->prevent_duration_limit_update = prev_prevent;
self->priv->prevent_children_outpoint_update = prev_prevent_outpoint;
}
/****************************************************
* track *
****************************************************/
static GESTrackElement *
_find_core_in_track (GESClip * clip, GESTrack * track)
{
GList *tmp;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
if (_IS_CORE_CHILD (child) && ges_track_element_get_track (child) == track)
return child;
}
return NULL;
}
static gboolean
_track_contains_non_core (GESClip * clip, GESTrack * track)
{
GList *tmp;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
if (!_IS_CORE_CHILD (child) && 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, GError ** error)
{
GList *child_data;
DurationLimitData *data;
GESTrack *current_track = ges_track_element_get_track (child);
GESTrackElement *core = NULL;
if (clip->priv->allow_any_track)
return TRUE;
if (current_track == track)
return TRUE;
/* NOTE: we consider the following error cases programming errors by
* the user */
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_non_core (clip, current_track)) {
GST_WARNING_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_WARNING_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_WARNING_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;
}
core = _find_core_in_track (clip, track);
/* 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 (core) {
GST_WARNING_OBJECT (clip, "Cannot move the core child %" GES_FORMAT
" to the track %" GST_PTR_FORMAT " because it contains a "
"core sibling %" GES_FORMAT, GES_ARGS (child), track,
GES_ARGS (core));
return FALSE;
}
} else {
if (!core) {
GST_WARNING_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;
}
}
}
data = _duration_limit_data_new (child);
gst_clear_object (&data->track);
data->track = track ? gst_object_ref (track) : NULL;
if (core && !ges_track_element_is_active (core)) {
/* if core is set, then we are adding a non-core to a track containing
* a core track element. If this happens, but the core is in-active
* then we will make the non-core element also inactive upon setting
* its track */
data->active = FALSE;
}
child_data = _duration_limit_data_list_with_data (clip, data);
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot move the child %" GES_FORMAT " from "
"track %" GST_PTR_FORMAT " to track %" GST_PTR_FORMAT " because "
"the duration-limit cannot be adjusted", GES_ARGS (child),
current_track, track);
return FALSE;
}
return TRUE;
}
static void
_update_active_for_track (GESClip * self, GESTrackElement * child)
{
GESTrack *track = ges_track_element_get_track (child);
GESTrackElement *core;
gboolean active;
gboolean prev_prevent = self->priv->prevent_duration_limit_update;
gboolean prev_prevent_outpoint = self->priv->prevent_children_outpoint_update;
if (self->priv->allow_any_track || _IS_CORE_CHILD (child) || !track)
return;
/* if we add a non-core to a track, but the core child is inactive, we
* also need the non-core to be inactive */
core = _find_core_in_track (self, track);
if (!core) {
GST_ERROR_OBJECT (self, "The non-core child %" GES_FORMAT " is in "
"the track %" GST_PTR_FORMAT " with no core sibling",
GES_ARGS (child), track);
active = FALSE;
} else {
active = ges_track_element_is_active (core);
}
if (!active && ges_track_element_is_active (child)) {
GST_INFO_OBJECT (self, "De-activating non-core child %" GES_FORMAT
" since the core child in the same track %" GST_PTR_FORMAT " is "
"not active", GES_ARGS (child), track);
self->priv->setting_active = TRUE;
self->priv->prevent_duration_limit_update = TRUE;
self->priv->prevent_children_outpoint_update = TRUE;
if (!ges_track_element_set_active (child, FALSE))
GST_ERROR_OBJECT (self, "Failed to de-activate child %" GES_FORMAT,
GES_ARGS (child));
self->priv->setting_active = FALSE;
self->priv->prevent_duration_limit_update = prev_prevent;
self->priv->prevent_children_outpoint_update = prev_prevent_outpoint;
}
}
#define _IS_PROP(prop) (g_strcmp0 (name, prop) == 0)
static void
_child_property_changed_cb (GESTimelineElement * child, GParamSpec * pspec,
GESClip * self)
{
gboolean update_limit = FALSE;
gboolean update_outpoint = FALSE;
const gchar *name = pspec->name;
if (_IS_PROP ("track")) {
update_limit = TRUE;
update_outpoint = TRUE;
_update_active_for_track (self, GES_TRACK_ELEMENT (child));
} else if (_IS_PROP ("active")) {
update_limit = TRUE;
update_outpoint = TRUE;
_child_active_changed (self, GES_TRACK_ELEMENT (child));
} else if (_IS_PROP ("priority")) {
update_limit = TRUE;
update_outpoint = TRUE;
_child_priority_changed (GES_CONTAINER (self), child);
} else if (_IS_PROP ("in-point")) {
/* update outpoint already handled by the track element */
update_limit = _child_inpoint_changed (self, child);
} else if (_IS_PROP ("max-duration")) {
update_limit = TRUE;
_child_max_duration_changed (GES_CONTAINER (self), child);
} else if (_IS_PROP ("has-internal-source")) {
_child_has_internal_source_changed (self, child);
}
if (update_limit)
_update_duration_limit (self);
if (update_outpoint)
_update_children_outpoints (self);
}
/****************************************************
* time properties *
****************************************************/
gboolean
ges_clip_can_set_time_property_of_child (GESClip * clip,
GESTrackElement * child, GObject * child_prop_object, GParamSpec * pspec,
const GValue * value, GError ** error)
{
if (_IS_TOP_EFFECT (child)) {
gchar *prop_name =
ges_base_effect_get_time_property_name (GES_BASE_EFFECT (child),
child_prop_object, pspec);
if (prop_name) {
GList *child_data;
DurationLimitData *data = _duration_limit_data_new (child);
GValue *copy = g_new0 (GValue, 1);
g_value_init (copy, pspec->value_type);
g_value_copy (value, copy);
g_hash_table_insert (data->time_property_values, prop_name, copy);
child_data = _duration_limit_data_list_with_data (clip, data);
if (!_can_update_duration_limit (clip, child_data, error)) {
gchar *val_str = gst_value_serialize (value);
GST_INFO_OBJECT (clip, "Cannot set the child-property %s of "
"child %" GES_FORMAT " to %s because the duration-limit "
"cannot be adjusted", prop_name, GES_ARGS (child), val_str);
g_free (val_str);
return FALSE;
}
}
}
return TRUE;
}
static void
_child_time_property_changed_cb (GESTimelineElement * child,
GObject * prop_object, GParamSpec * pspec, GESClip * self)
{
gchar *time_prop =
ges_base_effect_get_time_property_name (GES_BASE_EFFECT (child),
prop_object, pspec);
if (time_prop) {
g_free (time_prop);
_update_duration_limit (self);
_update_children_outpoints (self);
}
}
/*****************************************************
* *
* 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;
}
/* returns TRUE if we did not break early */
static gboolean
_set_childrens_inpoint (GESTimelineElement * element, GstClockTime inpoint,
gboolean break_on_failure)
{
GESClip *self = GES_CLIP (element);
GList *tmp;
GESClipPrivate *priv = self->priv;
gboolean prev_prevent = priv->prevent_duration_limit_update;
priv->setting_inpoint = TRUE;
priv->prevent_duration_limit_update = 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) {
priv->setting_inpoint = FALSE;
priv->prevent_duration_limit_update = prev_prevent;
return FALSE;
}
}
}
}
priv->setting_inpoint = FALSE;
priv->prevent_duration_limit_update = prev_prevent;
_update_duration_limit (self);
return TRUE;
}
static gboolean
_set_inpoint (GESTimelineElement * element, GstClockTime inpoint)
{
if (!_can_set_inpoint_of_core_children (GES_CLIP (element), inpoint, NULL)) {
GST_WARNING_OBJECT (element, "Cannot set the in-point to %"
GST_TIME_FORMAT, GST_TIME_ARGS (inpoint));
return FALSE;
}
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)
_set_duration0 (GES_TIMELINE_ELEMENT (child), duration);
}
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;
GList *child_data = NULL;
GESClip *self = GES_CLIP (element);
GESClipPrivate *priv = self->priv;
GstClockTime new_min = GST_CLOCK_TIME_NONE;
gboolean has_core = FALSE;
gboolean res = FALSE;
gboolean prev_prevent = priv->prevent_duration_limit_update;
/* 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 */
/* check that the duration-limit can be changed */
for (tmp = GES_CONTAINER_CHILDREN (self); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
DurationLimitData *data = _duration_limit_data_new (child);
if (_IS_CORE_INTERNAL_SOURCE_CHILD (child))
data->max_duration = maxduration;
child_data = g_list_prepend (child_data, data);
}
if (!_can_update_duration_limit (self, child_data, NULL)) {
GST_WARNING_OBJECT (self, "Cannot set the max-duration from %"
GST_TIME_FORMAT " to %" GST_TIME_FORMAT " because the "
"duration-limit cannot be adjusted",
GST_TIME_ARGS (element->maxduration), GST_TIME_ARGS (maxduration));
return FALSE;
}
priv->prevent_duration_limit_update = TRUE;
priv->setting_max_duration = 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));
new_min = _MIN_CLOCK_TIME (new_min, child->maxduration);
}
}
}
priv->setting_max_duration = FALSE;
priv->prevent_duration_limit_update = prev_prevent;
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));
res = TRUE;
goto done;
}
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;
goto done;
}
res = TRUE;
done:
_update_duration_limit (self);
return res;
}
static gboolean
_set_priority (GESTimelineElement * element, guint32 priority)
{
GESClipPrivate *priv = GES_CLIP (element)->priv;
GList *tmp;
guint32 min_prio, max_prio, min_child_prio = G_MAXUINT32;
gboolean prev_prevent = priv->prevent_duration_limit_update;
gboolean prev_prevent_outpoint = priv->prevent_children_outpoint_update;
GESContainer *container = GES_CONTAINER (element);
for (tmp = container->children; tmp; tmp = g_list_next (tmp))
min_child_prio = MIN (min_child_prio, _PRIORITY (tmp->data));
/* 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_duration_limit_update = TRUE;
priv->prevent_children_outpoint_update = TRUE;
priv->setting_priority = TRUE;
for (tmp = container->children; tmp; tmp = g_list_next (tmp)) {
GESTimelineElement *child = tmp->data;
guint32 track_element_prio = min_prio + (child->priority - min_child_prio);
if (track_element_prio > max_prio) {
GST_WARNING_OBJECT (container, "%s priority of %i, is outside of its "
"containing layer space. (%d/%d) setting it to the maximum it can be",
child->name, 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 and duration-limit remains the same as
* well. */
priv->prevent_resort = FALSE;
priv->setting_priority = FALSE;
priv->prevent_duration_limit_update = prev_prevent;
priv->prevent_children_outpoint_update = prev_prevent_outpoint;
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);
}
void
ges_clip_take_add_error (GESClip * clip, GError ** error)
{
GESClipPrivate *priv = clip->priv;
g_clear_error (error);
if (error) {
if (*error) {
GST_ERROR_OBJECT (clip, "Error not handled: %s", (*error)->message);
g_error_free (*error);
}
*error = priv->add_error;
} else {
g_clear_error (&priv->add_error);
}
priv->add_error = NULL;
}
void
ges_clip_set_add_error (GESClip * clip, GError * error)
{
GESClipPrivate *priv = clip->priv;
g_clear_error (&priv->add_error);
priv->add_error = error;
}
static gboolean
_add_child (GESContainer * container, GESTimelineElement * element)
{
gboolean ret = FALSE;
GESClip *self = GES_CLIP (container);
GESTrackElement *track_el = GES_TRACK_ELEMENT (element);
GESClipClass *klass = GES_CLIP_GET_CLASS (self);
guint32 min_prio, max_prio, new_prio;
GESTrack *track;
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (container);
GESClipPrivate *priv = self->priv;
GESAsset *asset, *creator_asset;
gboolean prev_prevent = priv->prevent_duration_limit_update;
gboolean prev_prevent_outpoint = priv->prevent_children_outpoint_update;
GList *tmp;
GError *error = NULL;
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (element), FALSE);
if (element->timeline && element->timeline != timeline) {
GST_WARNING_OBJECT (self, "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);
goto done;
}
asset = ges_extractable_get_asset (GES_EXTRACTABLE (self));
creator_asset = ges_track_element_get_creator_asset (track_el);
if (creator_asset && asset != creator_asset) {
GST_WARNING_OBJECT (self,
"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));
goto done;
}
track = ges_track_element_get_track (track_el);
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 (self, "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);
goto done;
}
/* 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. */
/* Set the core element to have the same in-point, which we don't
* apply to effects */
GstClockTime new_inpoint;
if (ges_track_element_has_internal_source (track_el))
new_inpoint = _INPOINT (self);
else
new_inpoint = 0;
/* new priority is that of the lowest priority core child. Usually
* each core child has the same priority.
* Also must be lower than all effects */
new_prio = min_prio;
for (tmp = container->children; tmp; tmp = tmp->next) {
if (_IS_CORE_CHILD (tmp->data))
new_prio = MAX (new_prio, _PRIORITY (tmp->data));
else if (_IS_TOP_EFFECT (tmp->data))
new_prio = MAX (new_prio, _PRIORITY (tmp->data) + 1);
}
if (track && !priv->allow_any_track) {
GList *child_data;
DurationLimitData *data;
GESTrackElement *core = _find_core_in_track (self, track);
if (core) {
GST_WARNING_OBJECT (self, "Cannot add the core child %" GES_FORMAT
" because it is in the same track %" GST_PTR_FORMAT " as an "
"existing core child %" GES_FORMAT, GES_ARGS (element), track,
GES_ARGS (core));
goto done;
}
data = _duration_limit_data_new (track_el);
data->inpoint = new_inpoint;
data->priority = new_prio;
child_data = _duration_limit_data_list_with_data (self, data);
if (!_can_update_duration_limit (self, child_data, &error)) {
GST_INFO_OBJECT (self, "Cannot add core %" GES_FORMAT " as a "
"child because the duration-limit cannot be adjusted",
GES_ARGS (element));
goto done;
}
}
if (GES_CLOCK_TIME_IS_LESS (element->maxduration, new_inpoint)) {
GST_INFO_OBJECT (self, "Can not set the in-point of the "
"element %" GES_FORMAT " to %" GST_TIME_FORMAT " because its "
"max-duration is %" GST_TIME_FORMAT, GES_ARGS (element),
GST_TIME_ARGS (new_inpoint), GST_TIME_ARGS (element->maxduration));
g_set_error (&error, GES_ERROR, GES_ERROR_NOT_ENOUGH_INTERNAL_CONTENT,
"Cannot add the child \"%s\" to clip \"%s\" because its max-"
"duration is %" GST_TIME_FORMAT ", which is less than the in-"
"point of the clip %" GST_TIME_FORMAT, element->name,
GES_TIMELINE_ELEMENT_NAME (self),
GST_TIME_ARGS (element->maxduration), GST_TIME_ARGS (new_inpoint));
goto done;
}
/* adding can fail if the max-duration of the element is smaller
* than the current in-point of the clip */
if (!_set_inpoint0 (element, new_inpoint)) {
GST_WARNING_OBJECT (self, "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 (new_inpoint));
goto done;
}
_set_priority0 (element, new_prio);
} else if (GES_CLIP_CLASS_CAN_ADD_EFFECTS (klass) && _IS_TOP_EFFECT (element)) {
/* 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. */
/* new priority is the lowest priority effect */
if (priv->use_effect_priority) {
new_prio = priv->effect_priority;
} else {
new_prio = min_prio;
for (tmp = container->children; tmp; tmp = tmp->next) {
if (_IS_TOP_EFFECT (tmp->data))
new_prio = MAX (new_prio, _PRIORITY (tmp->data) + 1);
}
}
/* make sure higher than core */
for (tmp = container->children; tmp; tmp = tmp->next) {
if (_IS_CORE_CHILD (tmp->data))
new_prio = MIN (new_prio, _PRIORITY (tmp->data));
}
if (track && !priv->allow_any_track) {
GList *child_data, *tmp;
DurationLimitData *data;
GESTrackElement *core = _find_core_in_track (self, track);
if (!core) {
GST_WARNING_OBJECT (self, "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);
goto done;
}
data = _duration_limit_data_new (track_el);
data->priority = new_prio;
if (!ges_track_element_is_active (core))
data->active = FALSE;
child_data = _duration_limit_data_list_with_data (self, data);
for (tmp = child_data; tmp; tmp = tmp->next) {
data = tmp->data;
if (data->priority >= new_prio)
data->priority++;
}
if (!_can_update_duration_limit (self, child_data, &error)) {
GST_INFO_OBJECT (self, "Cannot add effect %" GES_FORMAT " as "
"a child because the duration-limit cannot be adjusted",
GES_ARGS (element));
goto done;
}
}
_update_active_for_track (self, track_el);
priv->nb_effects++;
GST_DEBUG_OBJECT (self, "Adding %ith effect: %" GES_FORMAT
" Priority %i", priv->nb_effects, GES_ARGS (element), new_prio);
/* changing priorities, and updating their offset */
priv->prevent_resort = TRUE;
priv->setting_priority = TRUE;
priv->prevent_duration_limit_update = TRUE;
priv->prevent_children_outpoint_update = TRUE;
/* increase the priority of anything with a lower priority */
for (tmp = container->children; tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
if (child->priority >= new_prio)
ges_timeline_element_set_priority (child, child->priority + 1);
}
_set_priority0 (element, new_prio);
priv->prevent_resort = FALSE;
priv->setting_priority = FALSE;
priv->prevent_duration_limit_update = prev_prevent;
priv->prevent_children_outpoint_update = prev_prevent_outpoint;
/* 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);
/* update duration limit in _child_added */
} else {
if (_IS_TOP_EFFECT (element))
GST_WARNING_OBJECT (self, "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 (self, "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 (self, "Cannot add the track element %"
GES_FORMAT " because it is not a core element created by the "
"clip itself", GES_ARGS (element));
goto done;
}
_set_start0 (element, GES_TIMELINE_ELEMENT_START (self));
_set_duration0 (element, GES_TIMELINE_ELEMENT_DURATION (self));
ret = TRUE;
done:
if (error)
ges_clip_set_add_error (self, error);
return ret;
}
void
ges_clip_take_remove_error (GESClip * clip, GError ** error)
{
GESClipPrivate *priv = clip->priv;
g_clear_error (error);
if (error) {
if (*error) {
GST_ERROR ("Error not handled: %s", (*error)->message);
g_error_free (*error);
}
*error = priv->remove_error;
} else {
g_clear_error (&priv->remove_error);
}
priv->remove_error = NULL;
}
void
ges_clip_set_remove_error (GESClip * clip, GError * error)
{
GESClipPrivate *priv = clip->priv;
g_clear_error (&priv->remove_error);
priv->remove_error = error;
}
static gboolean
_remove_child (GESContainer * container, GESTimelineElement * element)
{
GESTrackElement *el = GES_TRACK_ELEMENT (element);
GESClip *self = GES_CLIP (container);
GESClipPrivate *priv = self->priv;
/* check that the duration-limit can be changed */
/* If we are removing a core child, then all other children in the
* same track will be removed from the track, which will make the
* duration-limit increase, which is safe
* Similarly, if it has no track, the duration-limit will not change */
if (!priv->allow_any_remove && !_IS_CORE_CHILD (element) &&
ges_track_element_get_track (el)) {
GList *child_data = NULL;
GList *tmp;
GError *error = NULL;
for (tmp = container->children; tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
if (child == el)
continue;
child_data =
g_list_prepend (child_data, _duration_limit_data_new (child));
}
if (!_can_update_duration_limit (self, child_data, &error)) {
ges_clip_set_remove_error (self, error);
GST_INFO_OBJECT (self, "Cannot remove the child %" GES_FORMAT
" because the duration-limit cannot be adjusted", GES_ARGS (el));
return FALSE;
}
}
/* NOTE: notifies are currently frozen by ges_container_add */
if (_IS_TOP_EFFECT (element)) {
GList *tmp;
gboolean prev_prevent = priv->prevent_duration_limit_update;
gboolean prev_prevent_outpoint = priv->prevent_children_outpoint_update;
GST_DEBUG_OBJECT (container, "Resyncing effects priority.");
/* changing priorities, so preventing a re-sort */
priv->prevent_resort = TRUE;
priv->setting_priority = TRUE;
priv->prevent_duration_limit_update = TRUE;
priv->prevent_children_outpoint_update = TRUE;
for (tmp = container->children; 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;
priv->setting_priority = FALSE;
priv->prevent_duration_limit_update = prev_prevent;
priv->prevent_children_outpoint_update = prev_prevent_outpoint;
/* no need to re-sort the children since the rest keep the same
* relative priorities */
/* height may have changed */
_compute_height (container);
}
/* duration-limit updated in _child_removed */
return TRUE;
}
static void
_child_added (GESContainer * container, GESTimelineElement * element)
{
GESClip *self = GES_CLIP (container);
g_signal_connect (element, "notify", G_CALLBACK (_child_property_changed_cb),
self);
if (GES_IS_TIME_EFFECT (element))
g_signal_connect (element, "deep-notify",
G_CALLBACK (_child_time_property_changed_cb), self);
if (_IS_CORE_CHILD (element))
_update_max_duration (container);
_update_duration_limit (self);
_update_children_outpoints (self);
}
static void
_child_removed (GESContainer * container, GESTimelineElement * element)
{
GESClip *self = GES_CLIP (container);
g_signal_handlers_disconnect_by_func (element, _child_property_changed_cb,
self);
/* NOTE: we do not test if the effect is a time effect since technically
* it can stop being a time effect, although this would be rare */
g_signal_handlers_disconnect_by_func (element,
_child_time_property_changed_cb, self);
if (_IS_CORE_CHILD (element))
_update_max_duration (container);
_update_duration_limit (self);
_update_children_outpoints (self);
ges_track_element_update_outpoint (GES_TRACK_ELEMENT (element));
}
static void
add_clip_to_list (gpointer key, gpointer clip, GList ** list)
{
*list = g_list_append (*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.
* NOTE: This also prevents the update of the duration-limit, so you
* should ensure that you call _update_duration_limit on both clips when
* transferring has completed.
*/
static void
_transfer_child (GESClip * from_clip, GESClip * to_clip,
GESTrackElement * child)
{
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (to_clip);
gboolean prev_prevent_from = from_clip->priv->prevent_duration_limit_update;
gboolean prev_prevent_to = to_clip->priv->prevent_duration_limit_update;
gboolean prev_prevent_outpoint_from =
from_clip->priv->prevent_children_outpoint_update;
gboolean prev_prevent_outpoint_to =
to_clip->priv->prevent_children_outpoint_update;
/* 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);
from_clip->priv->prevent_duration_limit_update = TRUE;
to_clip->priv->prevent_duration_limit_update = TRUE;
from_clip->priv->prevent_children_outpoint_update = TRUE;
to_clip->priv->prevent_children_outpoint_update = TRUE;
from_clip->priv->allow_any_remove = TRUE;
ges_container_remove (GES_CONTAINER (from_clip),
GES_TIMELINE_ELEMENT (child));
from_clip->priv->allow_any_remove = FALSE;
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);
from_clip->priv->prevent_duration_limit_update = prev_prevent_from;
to_clip->priv->prevent_duration_limit_update = prev_prevent_to;
from_clip->priv->prevent_children_outpoint_update =
prev_prevent_outpoint_from;
to_clip->priv->prevent_children_outpoint_update = prev_prevent_outpoint_to;
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);
/* Need to update the duration limit.
* Since we have divided the clip by its tracks, the duration-limit,
* which is a minimum value calculated per track, can only increase in
* value, which means the duration of the clip should not change, which
* means updating should always be possible */
for (tmp = ret; tmp; tmp = tmp->next)
_update_duration_limit (tmp->data);
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);
/* duration-limit should be GST_CLOCK_TIME_NONE now that we have no
* children */
_update_duration_limit (cclip);
if (layer)
ges_layer_remove_clip (layer, cclip);
}
/* Need to update the duration limit.
* Each received clip C_i that has been grouped may have had a different
* duration-limit L_i. In each case the duration must be less than
* this limit, and since each clip shares the same duration, we have
* for each clip C_i:
* duration <= L_i
* Thus:
* duration <= min_i (L_i)
*
* Now, upon grouping each clip C_i into C, we have not changed the
* children properties that affect the duration-limit. And since the
* duration-limit is calculated as the minimum amongst the tracks of C,
* this means that the duration-limit for C should be
* L = min_i (L_i) >= duration
* Therefore, we can safely set the duration-limit of C to L without
* changing the duration of C. */
_update_duration_limit (GES_CLIP (ret));
ges_clip_set_supported_formats (GES_CLIP (ret), supported_formats);
return ret;
}
void
ges_clip_empty_from_track (GESClip * clip, GESTrack * track)
{
GList *tmp;
gboolean prev_prevent = clip->priv->prevent_duration_limit_update;
gboolean prev_prevent_outpoint = clip->priv->prevent_children_outpoint_update;
if (track == NULL)
return;
/* allow us to remove in any order */
clip->priv->allow_any_track = TRUE;
clip->priv->prevent_duration_limit_update = TRUE;
clip->priv->prevent_children_outpoint_update = 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;
clip->priv->prevent_duration_limit_update = prev_prevent;
clip->priv->prevent_children_outpoint_update = prev_prevent_outpoint;
_update_duration_limit (clip);
_update_children_outpoints (clip);
}
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;
case PROP_DURATION_LIMIT:
g_value_set_uint64 (value, clip->priv->duration_limit);
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);
self->priv->allow_any_remove = TRUE;
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_clear_error (&self->priv->add_error);
self->priv->add_error = NULL;
g_clear_error (&self->priv->remove_error);
self->priv->remove_error = NULL;
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]);
/**
* GESClip:duration-limit:
*
* The maximum #GESTimelineElement:duration that can be *currently* set
* for the clip, taking into account the #GESTimelineElement:in-point,
* #GESTimelineElement:max-duration, #GESTrackElement:active, and
* #GESTrackElement:track properties of its children, as well as any
* time effects. If there is no limit, this will be set to
* #GST_CLOCK_TIME_NONE.
*
* Note that whilst a clip has no children in any tracks, the limit will
* be unknown, and similarly set to #GST_CLOCK_TIME_NONE.
*
* If the duration-limit would ever go below the current
* #GESTimelineElement:duration of the clip due to a change in the above
* variables, its #GESTimelineElement:duration will be set to the new
* limit.
*
* Since: 1.18
*/
properties[PROP_DURATION_LIMIT] =
g_param_spec_uint64 ("duration-limit", "Duration Limit",
"A limit on the duration of the clip", 0, G_MAXUINT64,
GST_CLOCK_TIME_NONE, G_PARAM_READABLE | G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_property (object_class, PROP_DURATION_LIMIT,
properties[PROP_DURATION_LIMIT]);
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);
self->priv->duration_limit = GST_CLOCK_TIME_NONE;
}
/**
* 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_full:
* @clip: A #GESClip
* @layer: The new layer
* @error: (nullable): Return location for an error
*
* 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.
* Since: 1.18
*/
gboolean
ges_clip_move_to_layer_full (GESClip * clip, GESLayer * layer, GError ** error)
{
gboolean ret = FALSE;
GESLayer *current_layer;
GESTimelineElement *element;
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
g_return_val_if_fail (!error || !*error, FALSE);
element = GES_TIMELINE_ELEMENT (clip);
current_layer = clip->priv->layer;
if (current_layer == layer) {
GST_INFO_OBJECT (clip, "Already in the layer %" GST_PTR_FORMAT, layer);
return TRUE;
}
if (current_layer == NULL) {
GST_DEBUG ("Not moving %p, only adding it to %p", clip, layer);
return ges_layer_add_clip (layer, clip);
}
if (element->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), element->timeline, layer->timeline);
return FALSE;
}
if (layer->timeline && !GES_TIMELINE_ELEMENT_BEING_EDITED (clip)) {
/* move to new layer, also checks moving of toplevel */
return timeline_tree_move (timeline_get_tree (layer->timeline),
element, (gint64) ges_layer_get_priority (current_layer) -
(gint64) ges_layer_get_priority (layer), 0, GES_EDGE_NONE, 0, error);
}
gst_object_ref (clip);
ELEMENT_SET_FLAG (clip, GES_CLIP_IS_MOVING);
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_move_to_layer:
* @clip: A #GESClip
* @layer: The new layer
*
* See ges_clip_move_to_layer_full(), which also gives an error.
*
* Returns: %TRUE if @clip was successfully moved to @layer.
*/
gboolean
ges_clip_move_to_layer (GESClip * clip, GESLayer * layer)
{
return ges_clip_move_to_layer_full (clip, layer, NULL);
}
/**
* 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_duration_limit:
* @clip: A #GESClip
*
* Gets the #GESClip:duration-limit of the clip.
*
* Returns: The duration-limit of @clip.
* Since: 1.18
*/
GstClockTime
ges_clip_get_duration_limit (GESClip * clip)
{
g_return_val_if_fail (GES_IS_CLIP (clip), GST_CLOCK_TIME_NONE);
return clip->priv->duration_limit;
}
static gint
_cmp_children_by_priority (gconstpointer a_p, gconstpointer b_p)
{
const GESTimelineElement *a = a_p, *b = b_p;
if (a->priority > b->priority)
return 1;
else if (a->priority < b->priority)
return -1;
return 0;
}
/**
* ges_clip_add_top_effect:
* @clip: A #GESClip
* @effect: A top effect to add
* @index: The index to add @effect at, or -1 to add at the highest
* @error: (nullable): Return location for an error
*
* Add a top effect to a clip at the given index.
*
* Unlike using ges_container_add(), this allows you to set the index
* in advance. It will also check that no error occurred during the track
* selection for the effect.
*
* Note, only subclasses of #GESClipClass that have
* #GES_CLIP_CLASS_CAN_ADD_EFFECTS set to %TRUE (such as #GESSourceClip
* and #GESBaseEffectClip) can have additional top effects added.
*
* Note, if the effect is a time effect, this may be refused if the clip
* would not be able to adapt itself once the effect is added.
*
* Returns: %TRUE if @effect was successfully added to @clip at @index.
* Since: 1.18
*/
gboolean
ges_clip_add_top_effect (GESClip * clip, GESBaseEffect * effect, gint index,
GError ** error)
{
GESClipPrivate *priv;
GList *top_effects;
GESTimelineElement *replace;
GESTimeline *timeline;
gboolean res;
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), FALSE);
g_return_val_if_fail (!error || !*error, FALSE);
priv = clip->priv;
if (index >= 0) {
top_effects = ges_clip_get_top_effects (clip);
replace = g_list_nth_data (top_effects, index);
if (replace) {
priv->use_effect_priority = TRUE;
priv->effect_priority = replace->priority;
}
g_list_free_full (top_effects, gst_object_unref);
}
/* otherwise the default _add_child will place it at the lowest
* priority / highest index */
timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip);
if (timeline)
ges_timeline_set_track_selection_error (timeline, FALSE, NULL);
/* note, if several tracks are selected, this may lead to several
* effects being added to the clip.
* The first effect we are adding will use the set effect_priority.
* The error on the timeline could be from any of the copies */
ges_clip_set_add_error (clip, NULL);
res = ges_container_add (GES_CONTAINER (clip), GES_TIMELINE_ELEMENT (effect));
priv->use_effect_priority = FALSE;
if (!res) {
/* if adding fails, there should have been no track selection, which
* means no other elements were added so the clip, so the adding error
* for the effect, if any, should still be available on the clip */
ges_clip_take_add_error (clip, error);
return FALSE;
}
if (timeline && ges_timeline_take_track_selection_error (timeline, error))
goto remove;
return TRUE;
remove:
if (!ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (effect)))
GST_ERROR_OBJECT (clip, "Failed to remove effect %" GES_FORMAT,
GES_ARGS (effect));
return FALSE;
}
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
" does not belong to this clip", GES_ARGS (effect));
return FALSE;
}
if (!_IS_TOP_EFFECT (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_remove_top_effect:
* @clip: A #GESClip
* @effect: The top effect to remove
* @error: (nullable): Return location for an error
*
* Remove a top effect from the clip.
*
* Note, if the effect is a time effect, this may be refused if the clip
* would not be able to adapt itself once the effect is removed.
*
* Returns: %TRUE if @effect was successfully added to @clip at @index.
* Since: 1.18
*/
gboolean
ges_clip_remove_top_effect (GESClip * clip, GESBaseEffect * effect,
GError ** error)
{
gboolean res;
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), FALSE);
g_return_val_if_fail (!error || !*error, FALSE);
if (!_is_added_effect (clip, effect))
return FALSE;
ges_clip_set_remove_error (clip, NULL);
res = ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (effect));
if (!res)
ges_clip_take_remove_error (clip, error);
return res;
}
/**
* 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));
}
return g_list_sort (ret, _cmp_children_by_priority);
}
/**
* 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)
{
GList *top_effects;
gint ret;
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;
top_effects = ges_clip_get_top_effects (clip);
ret = g_list_index (top_effects, effect);
g_list_free_full (top_effects, gst_object_unref);
return ret;
}
/* 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_full:
* @clip: A #GESClip
* @effect: An effect within @clip to move
* @newindex: The index for @effect in @clip
* @error: (nullable): Return location for an error
*
* 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.
* Since: 1.18
*/
gboolean
ges_clip_set_top_effect_index_full (GESClip * clip, GESBaseEffect * effect,
guint newindex, GError ** error)
{
gint inc;
GList *top_effects, *tmp;
GList *child_data = NULL;
guint32 current_prio, new_prio;
GESTimelineElement *element, *replace;
g_return_val_if_fail (GES_IS_CLIP (clip), FALSE);
g_return_val_if_fail (GES_IS_BASE_EFFECT (effect), FALSE);
g_return_val_if_fail (!error || !*error, FALSE);
if (!_is_added_effect (clip, effect))
return FALSE;
element = GES_TIMELINE_ELEMENT (effect);
top_effects = ges_clip_get_top_effects (clip);
replace = g_list_nth_data (top_effects, newindex);
g_list_free_full (top_effects, gst_object_unref);
if (!replace) {
GST_WARNING_OBJECT (clip, "Does not contain %u effects", newindex + 1);
return FALSE;
}
if (replace == element)
return TRUE;
current_prio = element->priority;
new_prio = replace->priority;
if (current_prio < new_prio)
inc = -1;
else
inc = +1;
/* check that the duration-limit can be changed */
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
guint32 priority = child->priority;
DurationLimitData *data =
_duration_limit_data_new (GES_TRACK_ELEMENT (child));
if (child == element)
data->priority = new_prio;
else if ((inc == +1 && priority >= new_prio && priority < current_prio)
|| (inc == -1 && priority <= new_prio && priority > current_prio))
data->priority = child->priority + inc;
child_data = g_list_prepend (child_data, data);
}
if (!_can_update_duration_limit (clip, child_data, error)) {
GST_INFO_OBJECT (clip, "Cannot move top effect %" GES_FORMAT
" to index %i because the duration-limit cannot adjust",
GES_ARGS (effect), newindex);
return FALSE;
}
GST_DEBUG_OBJECT (clip, "Setting top effect %" GST_PTR_FORMAT "priority: %i",
effect, new_prio);
/* prevent a re-sort of the list whilst we are traversing it! */
clip->priv->prevent_resort = TRUE;
clip->priv->setting_priority = TRUE;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTimelineElement *child = tmp->data;
guint32 priority = child->priority;
if (child == element)
continue;
/* only need to change the priority for those between the new and old
* index */
if ((inc == +1 && priority >= new_prio && priority < current_prio)
|| (inc == -1 && priority <= new_prio && priority > current_prio))
_set_priority0 (child, priority + inc);
}
_set_priority0 (element, new_prio);
clip->priv->prevent_resort = FALSE;
clip->priv->setting_priority = FALSE;
_ges_container_sort_children (GES_CONTAINER (clip));
/* height should have stayed the same */
return TRUE;
}
/**
* ges_clip_set_top_effect_index:
* @clip: A #GESClip
* @effect: An effect within @clip to move
* @newindex: The index for @effect in @clip
*
* See ges_clip_set_top_effect_index_full(), which also gives an error.
*
* Returns: %TRUE if @effect was successfully moved to @newindex.
*/
gboolean
ges_clip_set_top_effect_index (GESClip * clip, GESBaseEffect * effect,
guint newindex)
{
return ges_clip_set_top_effect_index_full (clip, effect, newindex, NULL);
}
/**
* ges_clip_split_full:
* @clip: The #GESClip to split
* @position: The timeline position at which to perform the split, between
* the start and end of the clip
* @error: Return location for an error
*
* 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.
*
* Since: 1.18
*/
GESClip *
ges_clip_split_full (GESClip * clip, guint64 position, GError ** error)
{
GList *tmp, *transitions = NULL;
GESClip *new_object;
gboolean no_core = FALSE;
GstClockTime start, duration, old_duration, new_duration, new_inpoint;
GESTimelineElement *element;
GESTimeline *timeline;
GHashTable *track_for_copy;
guint32 layer_prio;
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);
g_return_val_if_fail (!error || !*error, NULL);
element = GES_TIMELINE_ELEMENT (clip);
timeline = element->timeline;
duration = element->duration;
start = element->start;
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;
}
layer_prio = ges_timeline_element_get_layer_priority (element);
old_duration = position - start;
new_duration = duration + start - position;
/* convert the split position into an internal core time */
new_inpoint = _convert_core_time (clip, position, FALSE, &no_core, error);
/* if the split clip does not contain any active core elements with
* an internal source, just set the in-point to 0 for the new_object */
if (no_core)
new_inpoint = 0;
if (!GST_CLOCK_TIME_IS_VALID (new_inpoint))
return NULL;
if (timeline
&& !timeline_tree_can_move_element (timeline_get_tree (timeline), element,
layer_prio, start, old_duration, error)) {
GST_INFO_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;
}
if (timeline
&& !timeline_tree_can_move_element (timeline_get_tree (timeline), element,
layer_prio, position, new_duration, error)) {
GST_INFO_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;
}
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));
new_object->priv->prevent_duration_limit_update = TRUE;
new_object->priv->prevent_children_outpoint_update = TRUE;
GST_DEBUG_OBJECT (new_object, "New 'splitted' clip");
/* Set new timing properties on the Clip */
_set_start0 (GES_TIMELINE_ELEMENT (new_object), position);
_set_inpoint0 (GES_TIMELINE_ELEMENT (new_object), new_inpoint);
_set_duration0 (GES_TIMELINE_ELEMENT (new_object), new_duration);
/* NOTE: it is technically possible that the new_object may shrink
* later on in this method if the clip contains any non-linear time
* effects, which cause the duration-limit to drop. However, this
* should be safe since we have already checked with timeline-tree
* that the split position is not in the middle of an overlap. This
* means that the new_object should only be overlapping another
* element on its end, which makes shrinking safe.
*
* The original clip, however, should not shrink if the time effects
* obey the property that they do not depend on how much data they
* receive, which should be true for the time effects supported by GES.
*/
/* split binding before duration changes since shrinking can destroy
* binding values */
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);
GESAutoTransition *trans;
gchar *meta;
copy = ges_clip_copy_track_element_into (new_object, orig, new_inpoint);
if (!copy)
continue;
if (track)
g_hash_table_insert (track_for_copy, gst_object_ref (copy),
gst_object_ref (track));
meta = ges_meta_container_metas_to_string (GES_META_CONTAINER (orig));
ges_meta_container_add_metas_from_string (GES_META_CONTAINER (copy), meta);
g_free (meta);
trans = timeline ?
ges_timeline_get_auto_transition_at_edge (timeline, orig,
GES_EDGE_END) : NULL;
if (trans) {
trans->frozen = TRUE;
ges_auto_transition_set_source (trans, copy, GES_EDGE_START);
transitions = g_list_append (transitions, trans);
}
}
GES_TIMELINE_ELEMENT_SET_BEING_EDITED (clip);
_set_duration0 (GES_TIMELINE_ELEMENT (clip), old_duration);
GES_TIMELINE_ELEMENT_UNSET_BEING_EDITED (clip);
/* 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);
/* 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;
}
}
for (tmp = transitions; tmp; tmp = tmp->next) {
GESAutoTransition *trans = tmp->data;
trans->frozen = FALSE;
ges_auto_transition_update (trans);
}
g_hash_table_unref (track_for_copy);
g_list_free_full (transitions, gst_object_unref);
new_object->priv->prevent_duration_limit_update = FALSE;
new_object->priv->prevent_children_outpoint_update = FALSE;
_update_duration_limit (new_object);
_update_children_outpoints (new_object);
return new_object;
}
/**
* ges_clip_split:
* @clip: The #GESClip to split
* @position: The timeline position at which to perform the split
*
* See ges_clip_split_full(), which also gives an error.
*
* 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)
{
return ges_clip_split_full (clip, position, NULL);
}
/**
* 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;
}
/**
* 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) (nullable): 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;
}
/* Convert from an internal time of a child within a clip to a
* ===========================================================
* timeline time
* =============
*
* Given an internal time T for some child in a clip, we want to know
* what the corresponding time in the timeline is.
*
* If the time T is between the in-point and out-point of the child,
* then we can convert to the timeline coordinates by answering:
*
* a) "What is the timeline time at which the internal data from the child
* found at time T appears in the timeline output?"
*
* If the time T is after the out-point of the child, we instead want to
* answer:
*
* b) "If we extended the clip indefinetly in the timeline, what would be
* the timeline time at which the internal data from the child found at
* time T would appear in the timeline output?"
*
* However, if the time T is before the in-point of the child, we instead
* want to answer a more subtle question:
*
* c) "If we set the 'in-point' of the child to T, what would we need to
* set the 'start' of the clip to such that the internal data from the
* child currently found at the *beginning* of the clip would then appear
* at the same timeline time?"
*
* E.g. consider the following children of a clip, all in the same track,
* and all active:
* T
* :
* +=====================:======+
* | _/ \_ |
* | source ~(o_o)~ |
* | / @ \ |
* +=====================:======+
* i :
* :
* +=====================:======+
* | time-effect0 : | | g0
* +=====================:======+ v
* :
* +=====================:======+
* | overlay : |
* +=====================:======+
* i' :
* :
* +=====================:======+
* | time-effect1 : | | g1
* +=====================:======+ v
* :
* -------------------------------:-------------------timeline
* S X
*
* where i is the in-point of the source and i' is the in-point of the
* overlay. Also, g0 is the sink_to_source translation function for the
* first time effect, and g1 is the same for the second. S is the start of
* the clip. The ~(o_o)~ figure is the data that appears in the source at
* T.
*
* Essentially, question a) wants us to convert from the time T, where the
* data is, which is in the internal time coordinates of the source, to
* the timeline time X. First, we subtract i to convert from the internal
* source coordinates of the source to the external source coordinates of
* the source, then we apply the sink_to_source translation functions,
* which act on external source coordinates, then add 'start' to finally
* convert to the timeline coordinates. So overall we have
*
* X = S + g1(g0(T - i))
*
* To answer b), T would be beyond the end of the clip. Since g1 and g0
* can convert beyond the end time, we similarly compute
*
* X = S + g1(g0(T - i))
*
* The user themselves should note that this could exceed the max-duration
* of any of the children.
*
* Now consider
*
* T
* :
* : +============================+
* : \_ |
* : _o)~ source |
* : @ \ |
* : +============================+
* : i
* :
* : +============================+
* : | time-effect0 | | g0
* : +============================+ v
* :
* : +============================+
* : | overlay |
* : +============================+
* : i'
* :
* : +============================+
* : | time-effect1 | | g1
* : +============================+ v
* :
* ---:-----------------------------------------------timeline
* X S
*
* To do the same as a), we would need to be able to convert from T to X,
* but this isn't defined since the children do not extend to here. More
* specifically, the functions g0 and g1 are not defined for negative
* times. Instead, we want to answer question c). That is, we want to know
* what we should set the start of the clip to to keep the figure at the
* same timeline position if we change the in-point of the source to T.
*
* First, if we set the in-point to T, then we would have
*
* T
* :
* +============================+
* | _/ \_ |
* | ~(o_o)~ source |
* | / @ \ |
* +============================+
* : i
* : :
* +=====:======================+
* | : time-effect0 | | g0
* +=====:======================+ v
* : :
* +=====:======================+
* | : overlay |
* +=====:======================+
* : :
* +=====:======================+
* | : time-effect1 | | g1
* +=====:======================+ v
* : :
* ---:-----:-----:-----------------------------------timeline
* X S Y
*
* In order to make the figure appear at 'start' again, we would need to
* reduce the start of the clip by the difference between S and Y, where
* Y is the conversion of the previous in-point i to the timeline time.
*
* Thus,
*
* X = S - (Y - S)
* = S - (S + g1(g0(i - T)) - S)
* = S - g1(g0(i - T))
*
* If this would be negative, the conversion will not be possible.
*
* Note, we are relying on the *assumption* that the translation functions
* *do not* change when we change the in-point. GESBaseEffect only claims
* to support such time effects.
*
* Note that if g0 and g1 are simply identities, and we translate the
* internal time using a) and b), we calculate
*
* S + (T - i)
*
* and for c), we calculate
*
* S - (i - T) = S + (T - i)
*
* In summary, if we are converting from internal time T to a timeline
* time the return is
*
* G(T) = { S + g1(g0(T - i)) if T >= i,
* { S - g1(g0(i - T)) otherwise.
*
* Note that the overlay did not play a role since it overall translates
* all received times by the identity. Note that we could similarly want
* to convert from an internal time in the overlay to the timeline time.
* This would be given by
*
* S + g1(T - i') if T >= i',
* S - g1(i' - T) otherwise.
*
*
* Convert from a timeline time to an internal time of a child
* ===========================================================
* in a clip
* =========
*
* We basically want to reverse the previous conversion. Specifically,
* when the timeline time X is between the start and end of the clip we
* want to answer:
*
* d) "What is the internal time at which the data from the child that
* appears in the timeline at time X is created in the child?"
*
* If the time X is after the end of the clip, we instead want to answer:
*
* e) "If we extended the clip indefinetly in the timeline, what would be
* the internal time at which the data from the child that appears in the
* timeline at time T would be created in the child?"
*
* However, if the time X is before the start of the child, we instead
* want to answer:
*
* f) "If we set the 'start' of the clip to X, what would we need to
* set the 'in-point' of the clip to such that the internal data from the
* child currently found at the *beginning* of the clip would then appear
* at the same timeline time?"
*
* Following the same arguments, these would all be answered by
*
* F(X) = { i + f0(f1(X - S)) if X >= S,
* { i - f0(f1(S - X)) otherwise.
*
* where f0 and f1 are the corresponding source_to_sink translation
* functions, which should be close reverses of g0 and g1, respectively.
*
* Note that this does indeed reverse the internal to timeline conversion:
*
* F(G(T)) = { i + f0(f1(G(T) - S)) if G(T) >= S,
* { i - f0(f1(S - G(T))) otherwise.
*
* but, since g1 and g0 map from [0,inf) to [0,inf),
*
* G(T) - S = { + g1(g0(T - i)) if T >= i,
* { - g1(g0(i - T)) otherwise.
* { >= 0 if T >= i,
* { = 0 if (T < i and g1(g0(i - T)) = 0)
* { < 0 otherwise.
*
* => ( G(T) >= S <==> T >= i or (T < i and g1(g0(i - T)) = 0) )
*
* therefore
* F(G(T)) = { i + f0(f1(g1(g0(T - i)))) if T >= i,
* { i + f0(f1(0)) if T < i
* { and g1(g0(i - T)) = 0,
* { i - f0(f1(g1(g0(i - T)))) otherwise
*
* = { i + f0(f1(g1(g0(T - i)))) if T >= i,
* { i - f0(f1(g1(g0(i - T)))) otherwise
*
* = T
*
* because f1 reverses g1, and f0 reverses g0.
*/
/* returns higher priority first */
static GList *
_active_time_effects_in_track_after_priority (GESClip * clip,
GESTrack * track, guint32 priority)
{
GList *tmp, *list = NULL;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
if (GES_IS_TIME_EFFECT (child)
&& ges_track_element_get_track (child) == track
&& ges_track_element_is_active (child)
&& _PRIORITY (child) < priority)
list = g_list_prepend (list, child);
}
return g_list_sort (list, _cmp_children_by_priority);
}
/**
* ges_clip_get_timeline_time_from_internal_time:
* @clip: A #GESClip
* @child: An #GESTrackElement:active child of @clip with a
* #GESTrackElement:track
* @internal_time: A time in the internal time coordinates of @child
* @error: (nullable): Return location for an error
*
* Convert the internal source time from the child to a timeline time.
* This will take any time effects placed on the clip into account (see
* #GESBaseEffect for what time effects are supported, and how to
* declare them in GES).
*
* When @internal_time is above the #GESTimelineElement:in-point of
* @child, this will return the timeline time at which the internal
* content found at @internal_time appears in the output of the timeline's
* track. For example, this would let you know where in the timeline a
* particular scene in a media file would appear.
*
* This will be done assuming the clip has an indefinite end, so the
* timeline time may be beyond the end of the clip, or even breaking its
* #GESClip:duration-limit.
*
* If, instead, @internal_time is below the current
* #GESTimelineElement:in-point of @child, this will return what you would
* need to set the #GESTimelineElement:start of @clip to if you set the
* #GESTimelineElement:in-point of @child to @internal_time and wanted to
* keep the content of @child currently found at the current
* #GESTimelineElement:start of @clip at the same timeline position. If
* this would be negative, the conversion fails. This is useful for
* determining what position to use in a #GES_EDIT_MODE_TRIM if you wish
* to trim to a specific point in the internal content, such as a
* particular scene in a media file.
*
* Note that whilst a clip has no time effects, this second return is
* equivalent to finding the timeline time at which the content of @child
* at @internal_time would be found in the timeline if it had indefinite
* extent in both directions. However, with non-linear time effects this
* second return will be more distinct.
*
* In either case, the returned time would be appropriate to use in
* ges_timeline_element_edit() for #GES_EDIT_MODE_TRIM, and similar, if
* you wish to use a particular internal point as a reference. For
* example, you could choose to end a clip at a certain internal
* 'out-point', similar to the #GESTimelineElement:in-point, by
* translating the desired end time into the timeline coordinates, and
* using this position to trim the end of a clip.
*
* See ges_clip_get_internal_time_from_timeline_time(), which performs the
* reverse, or ges_clip_get_timeline_time_from_source_frame() which does
* the same conversion, but using frame numbers.
*
* Returns: The time in the timeline coordinates corresponding to
* @internal_time, or #GST_CLOCK_TIME_NONE if the conversion could not be
* performed.
*
* Since: 1.18
*/
GstClockTime
ges_clip_get_timeline_time_from_internal_time (GESClip * clip,
GESTrackElement * child, GstClockTime internal_time, GError ** error)
{
GstClockTime inpoint, start, external_time;
gboolean decrease;
GESTrack *track;
GList *tmp, *time_effects;
g_return_val_if_fail (GES_IS_CLIP (clip), GST_CLOCK_TIME_NONE);
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (child), GST_CLOCK_TIME_NONE);
g_return_val_if_fail (!error || !*error, GST_CLOCK_TIME_NONE);
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 GST_CLOCK_TIME_NONE;
}
track = ges_track_element_get_track (child);
if (!track) {
GST_WARNING_OBJECT (clip, "Cannot convert the internal time of the "
"child %" GES_FORMAT " to a timeline time because it is not part "
"of a track", GES_ARGS (child));
return GST_CLOCK_TIME_NONE;
}
if (!ges_track_element_is_active (child)) {
GST_WARNING_OBJECT (clip, "Cannot convert the internal time of the "
"child %" GES_FORMAT " to a timeline time because it is not "
"active in its track", GES_ARGS (child));
return GST_CLOCK_TIME_NONE;
}
if (internal_time == GST_CLOCK_TIME_NONE)
return GST_CLOCK_TIME_NONE;
inpoint = _INPOINT (child);
if (inpoint <= internal_time) {
decrease = FALSE;
external_time = internal_time - inpoint;
} else {
decrease = TRUE;
external_time = inpoint - internal_time;
}
time_effects = _active_time_effects_in_track_after_priority (clip, track,
_PRIORITY (child));
/* currently ordered with highest priority (closest to the timeline)
* first, with @child being at the *end* of the list.
* Want to reverse this so we can convert from the child towards the
* timeline */
time_effects = g_list_reverse (time_effects);
for (tmp = time_effects; tmp; tmp = tmp->next) {
GESBaseEffect *effect = tmp->data;
GHashTable *values = ges_base_effect_get_time_property_values (effect);
external_time = ges_base_effect_translate_sink_to_source_time (effect,
external_time, values);
g_hash_table_unref (values);
}
g_list_free (time_effects);
if (!GST_CLOCK_TIME_IS_VALID (external_time))
return GST_CLOCK_TIME_NONE;
start = _START (clip);
if (!decrease)
return start + external_time;
if (external_time > start) {
GST_INFO_OBJECT (clip, "Cannot convert the internal time %"
GST_TIME_FORMAT " of the child %" GES_FORMAT " to a timeline "
"time because it would lie before the start of the timeline",
GST_TIME_ARGS (internal_time), GES_ARGS (child));
g_set_error (error, GES_ERROR, GES_ERROR_NEGATIVE_TIME,
"The internal time %" GST_TIME_FORMAT " of child \"%s\" "
"would correspond to a negative start of -%" GST_TIME_FORMAT
" for the clip \"%s\"", GST_TIME_ARGS (internal_time),
GES_TIMELINE_ELEMENT_NAME (child),
GST_TIME_ARGS (external_time - start),
GES_TIMELINE_ELEMENT_NAME (clip));
return GST_CLOCK_TIME_NONE;
}
return start - external_time;
}
/**
* ges_clip_get_internal_time_from_timeline_time:
* @clip: A #GESClip
* @child: An #GESTrackElement:active child of @clip with a
* #GESTrackElement:track
* @timeline_time: A time in the timeline time coordinates
* @error: (nullable): Return location for an error
*
* Convert the timeline time to an internal source time of the child.
* This will take any time effects placed on the clip into account (see
* #GESBaseEffect for what time effects are supported, and how to
* declare them in GES).
*
* When @timeline_time is above the #GESTimelineElement:start of @clip,
* this will return the internal time at which the content that appears at
* @timeline_time in the output of the timeline is created in @child. For
* example, if @timeline_time corresponds to the current seek position,
* this would let you know which part of a media file is being read.
*
* This will be done assuming the clip has an indefinite end, so the
* internal time may be beyond the current out-point of the child, or even
* its #GESTimelineElement:max-duration.
*
* If, instead, @timeline_time is below the current
* #GESTimelineElement:start of @clip, this will return what you would
* need to set the #GESTimelineElement:in-point of @child to if you set
* the #GESTimelineElement:start of @clip to @timeline_time and wanted
* to keep the content of @child currently found at the current
* #GESTimelineElement:start of @clip at the same timeline position. If
* this would be negative, the conversion fails. This is useful for
* determining what #GESTimelineElement:in-point would result from a
* #GES_EDIT_MODE_TRIM to @timeline_time.
*
* Note that whilst a clip has no time effects, this second return is
* equivalent to finding the internal time at which the content that
* appears at @timeline_time in the timeline can be found in @child if it
* had indefinite extent in both directions. However, with non-linear time
* effects this second return will be more distinct.
*
* In either case, the returned time would be appropriate to use for the
* #GESTimelineElement:in-point or #GESTimelineElement:max-duration of the
* child.
*
* See ges_clip_get_timeline_time_from_internal_time(), which performs the
* reverse.
*
* Returns: The time in the internal coordinates of @child corresponding
* to @timeline_time, or #GST_CLOCK_TIME_NONE if the conversion could not
* be performed.
* Since: 1.18
*/
GstClockTime
ges_clip_get_internal_time_from_timeline_time (GESClip * clip,
GESTrackElement * child, GstClockTime timeline_time, GError ** error)
{
GstClockTime inpoint, start, external_time;
gboolean decrease;
GESTrack *track;
GList *tmp, *time_effects;
g_return_val_if_fail (GES_IS_CLIP (clip), GST_CLOCK_TIME_NONE);
g_return_val_if_fail (GES_IS_TRACK_ELEMENT (child), GST_CLOCK_TIME_NONE);
g_return_val_if_fail (!error || !*error, GST_CLOCK_TIME_NONE);
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 GST_CLOCK_TIME_NONE;
}
track = ges_track_element_get_track (child);
if (!track) {
GST_WARNING_OBJECT (clip, "Cannot convert the timeline time to an "
"internal time of child %" GES_FORMAT " because it is not part "
"of a track", GES_ARGS (child));
return GST_CLOCK_TIME_NONE;
}
if (!ges_track_element_is_active (child)) {
GST_WARNING_OBJECT (clip, "Cannot convert the timeline time to an "
"internal time of child %" GES_FORMAT " because it is not active "
"in its track", GES_ARGS (child));
return GST_CLOCK_TIME_NONE;
}
if (timeline_time == GST_CLOCK_TIME_NONE)
return GST_CLOCK_TIME_NONE;
start = _START (clip);
if (start <= timeline_time) {
decrease = FALSE;
external_time = timeline_time - start;
} else {
decrease = TRUE;
external_time = start - timeline_time;
}
time_effects = _active_time_effects_in_track_after_priority (clip, track,
_PRIORITY (child));
/* currently ordered with highest priority (closest to the timeline)
* first, with @child being at the *end* of the list, which is what we
* want */
for (tmp = time_effects; tmp; tmp = tmp->next) {
GESBaseEffect *effect = tmp->data;
GHashTable *values = ges_base_effect_get_time_property_values (effect);
external_time = ges_base_effect_translate_source_to_sink_time (effect,
external_time, values);
g_hash_table_unref (values);
}
g_list_free (time_effects);
if (!GST_CLOCK_TIME_IS_VALID (external_time))
return GST_CLOCK_TIME_NONE;
inpoint = _INPOINT (child);
if (!decrease)
return inpoint + external_time;
if (external_time > inpoint) {
GST_INFO_OBJECT (clip, "Cannot convert the timeline time %"
GST_TIME_FORMAT " to an internal time of the child %"
GES_FORMAT " because it would be before the element has any "
"internal content", GST_TIME_ARGS (timeline_time), GES_ARGS (child));
g_set_error (error, GES_ERROR, GES_ERROR_NEGATIVE_TIME,
"The timeline time %" GST_TIME_FORMAT " would correspond to "
"a negative in-point of -%" GST_TIME_FORMAT " for the child "
"\"%s\" under clip \"%s\"", GST_TIME_ARGS (timeline_time),
GST_TIME_ARGS (external_time - inpoint),
GES_TIMELINE_ELEMENT_NAME (child), GES_TIMELINE_ELEMENT_NAME (clip));
return GST_CLOCK_TIME_NONE;
}
return inpoint - external_time;
}
static GstClockTime
_convert_core_time (GESClip * clip, GstClockTime time, gboolean to_timeline,
gboolean * no_core, GError ** error)
{
GList *tmp;
GstClockTime converted = GST_CLOCK_TIME_NONE;
GstClockTime half_frame;
GESTimeline *timeline = GES_TIMELINE_ELEMENT_TIMELINE (clip);
GESClipAsset *asset =
GES_CLIP_ASSET (ges_extractable_get_asset (GES_EXTRACTABLE (clip)));
if (no_core)
*no_core = TRUE;
if (to_timeline)
half_frame = timeline ? ges_timeline_get_frame_time (timeline, 1) : 0;
else
half_frame = ges_clip_asset_get_frame_time (asset, 1);
half_frame = GST_CLOCK_TIME_IS_VALID (half_frame) ? half_frame / 2 : 0;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
GESTrackElement *child = tmp->data;
GESTrack *track = ges_track_element_get_track (child);
if (_IS_CORE_CHILD (child) && track && ges_track_element_is_active (child)
&& ges_track_element_has_internal_source (child)) {
GstClockTime tmp_time;
GError *convert_error = NULL;
if (no_core)
*no_core = FALSE;
if (to_timeline)
tmp_time =
ges_clip_get_timeline_time_from_internal_time (clip, child, time,
&convert_error);
else
tmp_time =
ges_clip_get_internal_time_from_timeline_time (clip, child, time,
&convert_error);
if (!GST_CLOCK_TIME_IS_VALID (converted)) {
converted = tmp_time;
} else if (!GST_CLOCK_TIME_IS_VALID (tmp_time)) {
GST_WARNING_OBJECT (clip, "The calculated %s time for %s time %"
GST_TIME_FORMAT " using core child %" GES_FORMAT " is not "
"defined, but it had a definite value of %" GST_TIME_FORMAT
" for another core child", to_timeline ? "timeline" : "internal",
to_timeline ? "internal" : "timeline", GST_TIME_ARGS (time),
GES_ARGS (child), GST_TIME_ARGS (converted));
} else if (tmp_time != converted) {
GstClockTime diff = (tmp_time > converted) ?
tmp_time - converted : converted - tmp_time;
if (diff > half_frame) {
GST_WARNING_OBJECT (clip, "The calculated %s time for %s time %"
GST_TIME_FORMAT " using core child %" GES_FORMAT " is %"
GST_TIME_FORMAT ", which is different from the value of %"
GST_TIME_FORMAT " calculated using a different core child",
to_timeline ? "timeline" : "internal",
to_timeline ? "internal" : "timeline", GST_TIME_ARGS (time),
GES_ARGS (child), GST_TIME_ARGS (tmp_time),
GST_TIME_ARGS (converted));
}
/* prefer result from video tracks */
if (GES_IS_VIDEO_TRACK (track))
converted = tmp_time;
}
if (convert_error) {
if (error) {
g_clear_error (error);
*error = convert_error;
} else {
g_error_free (convert_error);
}
}
}
}
return converted;
}
GstClockTime
ges_clip_get_core_internal_time_from_timeline_time (GESClip * clip,
GstClockTime timeline_time, gboolean * no_core, GError ** error)
{
return _convert_core_time (clip, timeline_time, FALSE, no_core, error);
}
/**
* ges_clip_get_timeline_time_from_source_frame:
* @clip: A #GESClip
* @frame_number: The frame number to get the corresponding timestamp of
* in the timeline coordinates
* @error: (nullable): Return location for an error
*
* Convert the source frame number to a timeline time. This acts the same
* as ges_clip_get_timeline_time_from_internal_time() using the core
* children of the clip and using the frame number to specify the internal
* position, rather than a timestamp.
*
* The returned timeline time can be used to seek or edit to a specific
* frame.
*
* 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 core
* children of @clip, in the timeline coordinates, or #GST_CLOCK_TIME_NONE
* if the conversion could not be performed.
* Since: 1.18
*/
GstClockTime
ges_clip_get_timeline_time_from_source_frame (GESClip * clip,
GESFrameNumber frame_number, GError ** error)
{
GstClockTime timeline_time = GST_CLOCK_TIME_NONE;
GstClockTime frame_ts;
GESClipAsset *asset;
g_return_val_if_fail (GES_IS_CLIP (clip), GST_CLOCK_TIME_NONE);
g_return_val_if_fail (!error || !*error, 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;
timeline_time = _convert_core_time (clip, frame_ts, TRUE, NULL, error);
if (error && *error) {
g_clear_error (error);
g_set_error (error, GES_ERROR, GES_ERROR_INVALID_FRAME_NUMBER,
"Requested frame %" G_GINT64_FORMAT " would be outside the "
"timeline.", frame_number);
}
return timeline_time;
}
/**
* ges_clip_add_child_to_track:
* @clip: A #GESClip
* @child: A child of @clip
* @track: The track to add @child to
* @error: 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.
*
* 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.
*
* Since: 1.18
*/
GESTrackElement *
ges_clip_add_child_to_track (GESClip * clip, GESTrackElement * child,
GESTrack * track, GError ** error)
{
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 (!error || !*error, 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) {
/* TODO: rather than add the effect at the next highest priority, we
* want to add copied effect into the same EffectCollection, which all
* share the same priority/index */
if (_IS_TOP_EFFECT (child)) {
clip->priv->use_effect_priority = TRUE;
/* add at next lowest priority */
clip->priv->effect_priority = GES_TIMELINE_ELEMENT_PRIORITY (child) + 1;
}
el = ges_clip_copy_track_element_into (clip, child, GST_CLOCK_TIME_NONE);
clip->priv->use_effect_priority = FALSE;
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;
}
} else {
el = child;
}
if (!ges_track_add_element_full (track, el, error)) {
GST_INFO_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;
}
/* call _child_track_changed now so that the "active" status of the
* child can change. Note that this is needed because this method may
* be called during ges_container_add, in which case "notify" for el
* will be frozen. Thus, _update_active_for_track may not have been
* called yet. It is important for us to call this now because when
* the elements are un-frozen, we need to ensure the "active" status
* is already set before the duration-limit is calculated */
_update_active_for_track (clip, el);
return el;
}
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