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gstreamer/ges/ges-timeline.c
Thibault Saunier f9f30c4ced ges: Add a way to set layer activeness by track 
a.k.a muting layers.

Adding unit tests and making sure serialization works properly
2020-03-25 15:40:25 -03:00

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
* 2012 Thibault Saunier <tsaunier@gnome.org>
* 2012 Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
* 2019 Igalia S.L
* Author: Thibault Saunier <tsaunier@igalia.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gestimeline
* @title: GESTimeline
* @short_description: Multimedia timeline
*
* #GESTimeline is the central object for any multimedia timeline.
*
* A timeline is composed of a set of #GESTrack-s and a set of
* #GESLayer-s, which are added to the timeline using
* ges_timeline_add_track() and ges_timeline_append_layer(), respectively.
*
* The contained tracks define the supported types of the timeline
* and provide the media output. Essentially, each track provides an
* additional source #GstPad.
*
* Most usage of a timeline will likely only need a single #GESAudioTrack
* and/or a single #GESVideoTrack. You can create such a timeline with
* ges_timeline_new_audio_video(). After this, you are unlikely to need to
* work with the tracks directly.
*
* A timeline's layers contain #GESClip-s, which in turn control the
* creation of #GESTrackElement-s, which are added to the timeline's
* tracks. See #GESTimeline::select-tracks-for-object if you wish to have
* more control over which track a clip's elements are added to.
*
* The layers are ordered, with higher priority layers having their
* content prioritised in the tracks. This ordering can be changed using
* ges_timeline_move_layer().
*
* ## Saving
*
* To save/load a timeline, you can use the ges_timeline_load_from_uri()
* and ges_timeline_save_to_uri() methods that use the default format.
*
* ## Editing
*
* If you change the timing or ordering of a timeline's
* #GESTimelineElement-s, then these changes will not actually be taken
* into account in the timeline until the ges_timeline_commit() method is
* called. This allows you to move its elements around, say, in
* response to an end user's mouse dragging, with little expense before
* finalising their effect.
*
* ## Playing
*
* A timeline is a #GstBin with a source #GstPad for each of its
* tracks, which you can fetch with ges_timeline_get_pad_for_track(). You
* will likely want to link these to some compatible sink #GstElement-s to
* be able to play or capture the content of the timeline.
*
* You can use a #GESPipeline to easily preview/play the timeline's
* content, or render it to a file.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-project.h"
#include "ges-container.h"
#include "ges-timeline.h"
#include "ges-timeline-tree.h"
#include "ges-track.h"
#include "ges-layer.h"
#include "ges-auto-transition.h"
#include "ges.h"
static GPtrArray *select_tracks_for_object_default (GESTimeline * timeline,
GESClip * clip, GESTrackElement * tr_obj, gpointer user_data);
static void ges_extractable_interface_init (GESExtractableInterface * iface);
static void ges_meta_container_interface_init
(GESMetaContainerInterface * iface);
GST_DEBUG_CATEGORY_STATIC (ges_timeline_debug);
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT ges_timeline_debug
/* lock to protect dynamic callbacks, like pad-added */
#define DYN_LOCK(timeline) (&GES_TIMELINE (timeline)->priv->dyn_mutex)
#define LOCK_DYN(timeline) G_STMT_START { \
GST_LOG_OBJECT (timeline, "Getting dynamic lock from %p", \
g_thread_self()); \
g_rec_mutex_lock (DYN_LOCK (timeline)); \
GST_LOG_OBJECT (timeline, "Got Dynamic lock from %p", \
g_thread_self()); \
} G_STMT_END
#define UNLOCK_DYN(timeline) G_STMT_START { \
GST_LOG_OBJECT (timeline, "Unlocking dynamic lock from %p", \
g_thread_self()); \
g_rec_mutex_unlock (DYN_LOCK (timeline)); \
GST_LOG_OBJECT (timeline, "Unlocked Dynamic lock from %p", \
g_thread_self()); \
} G_STMT_END
#define CHECK_THREAD(timeline) g_assert(timeline->priv->valid_thread == g_thread_self())
struct _GESTimelinePrivate
{
GNode *tree;
/* The duration of the timeline */
gint64 duration;
/* The auto-transition of the timeline */
gboolean auto_transition;
/* Timeline edition modes and snapping management */
guint64 snapping_distance;
GRecMutex dyn_mutex;
GList *priv_tracks;
/* Avoid sorting layers when we are actually resyncing them ourself */
gboolean resyncing_layers;
GList *auto_transitions;
/* Last snapping properties */
GstClockTime last_snap_ts;
GESTrackElement *last_snaped1;
GESTrackElement *last_snaped2;
/* This variable is set to %TRUE when it makes sense to update the transitions,
* and %FALSE otherwize */
gboolean needs_transitions_update;
/* While we are creating and adding the TrackElements for a clip, we need to
* ignore the child-added signal */
GESClip *ignore_track_element_added;
GList *groups;
guint stream_start_group_id;
GHashTable *all_elements;
/* With GST_OBJECT_LOCK */
guint expected_async_done;
/* With GST_OBJECT_LOCK */
guint expected_commited;
/* For ges_timeline_commit_sync */
GMutex commited_lock;
GCond commited_cond;
GThread *valid_thread;
GstStreamCollection *stream_collection;
};
/* private structure to contain our track-related information */
typedef struct
{
GESTimeline *timeline;
GESTrack *track;
GstPad *pad; /* Pad from the track */
GstPad *ghostpad;
gulong probe_id;
GstStream *stream;
} TrackPrivate;
enum
{
PROP_0,
PROP_DURATION,
PROP_AUTO_TRANSITION,
PROP_SNAPPING_DISTANCE,
PROP_UPDATE,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
enum
{
TRACK_ADDED,
TRACK_REMOVED,
LAYER_ADDED,
LAYER_REMOVED,
GROUP_ADDED,
GROUP_REMOVED,
SNAPING_STARTED,
SNAPING_ENDED,
SELECT_TRACKS_FOR_OBJECT,
COMMITED,
LAST_SIGNAL
};
G_DEFINE_TYPE_WITH_CODE (GESTimeline, ges_timeline, GST_TYPE_BIN,
G_ADD_PRIVATE (GESTimeline)
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init)
G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER,
ges_meta_container_interface_init));
static GstBinClass *parent_class;
static guint ges_timeline_signals[LAST_SIGNAL] = { 0 };
static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track);
static guint nb_assets = 0;
/* GESExtractable implementation */
static gchar *
extractable_check_id (GType type, const gchar * id)
{
gchar *res;
if (id == NULL)
res = g_strdup_printf ("%s-%i", "project", nb_assets);
else
res = g_strdup (id);
nb_assets++;
return res;
}
static gchar *
extractable_get_id (GESExtractable * self)
{
GESAsset *asset;
if (!(asset = ges_extractable_get_asset (self)))
return NULL;
return g_strdup (ges_asset_get_id (asset));
}
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->asset_type = GES_TYPE_PROJECT;
iface->check_id = (GESExtractableCheckId) extractable_check_id;
iface->get_id = extractable_get_id;
}
static void
ges_meta_container_interface_init (GESMetaContainerInterface * iface)
{
}
/* GObject Standard vmethods*/
static void
ges_timeline_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTimeline *timeline = GES_TIMELINE (object);
switch (property_id) {
case PROP_DURATION:
g_value_set_uint64 (value, timeline->priv->duration);
break;
case PROP_AUTO_TRANSITION:
g_value_set_boolean (value, timeline->priv->auto_transition);
break;
case PROP_SNAPPING_DISTANCE:
g_value_set_uint64 (value, timeline->priv->snapping_distance);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_timeline_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTimeline *timeline = GES_TIMELINE (object);
switch (property_id) {
case PROP_AUTO_TRANSITION:
ges_timeline_set_auto_transition (timeline, g_value_get_boolean (value));
break;
case PROP_SNAPPING_DISTANCE:
timeline->priv->snapping_distance = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_timeline_dispose (GObject * object)
{
GESTimeline *tl = GES_TIMELINE (object);
GESTimelinePrivate *priv = tl->priv;
GList *tmp, *groups;
while (tl->layers) {
GESLayer *layer = (GESLayer *) tl->layers->data;
ges_timeline_remove_layer (GES_TIMELINE (object), layer);
}
/* FIXME: it should be possible to remove tracks before removing
* layers, but at the moment this creates a problem because the track
* objects aren't notified that their nleobjects have been destroyed.
*/
LOCK_DYN (tl);
while (tl->tracks)
ges_timeline_remove_track (GES_TIMELINE (object), tl->tracks->data);
UNLOCK_DYN (tl);
groups = g_list_copy (priv->groups);
for (tmp = groups; tmp; tmp = tmp->next) {
GList *elems = ges_container_ungroup (tmp->data, FALSE);
g_list_free_full (elems, gst_object_unref);
}
g_list_free (priv->groups);
g_list_free (groups);
g_list_free_full (priv->auto_transitions, gst_object_unref);
g_hash_table_unref (priv->all_elements);
gst_object_unref (priv->stream_collection);
G_OBJECT_CLASS (ges_timeline_parent_class)->dispose (object);
}
static void
ges_timeline_finalize (GObject * object)
{
GESTimeline *tl = GES_TIMELINE (object);
g_rec_mutex_clear (&tl->priv->dyn_mutex);
g_node_destroy (tl->priv->tree);
G_OBJECT_CLASS (ges_timeline_parent_class)->finalize (object);
}
static void
ges_timeline_handle_message (GstBin * bin, GstMessage * message)
{
GESTimeline *timeline = GES_TIMELINE (bin);
if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ASYNC_START) {
GST_INFO_OBJECT (timeline, "Dropping %" GST_PTR_FORMAT, message);
return;
}
if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ASYNC_DONE) {
GST_INFO_OBJECT (timeline, "Dropping %" GST_PTR_FORMAT, message);
return;
}
if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT) {
GstMessage *amessage = NULL;
const GstStructure *mstructure = gst_message_get_structure (message);
if (gst_structure_has_name (mstructure, "NleCompositionStartUpdate")) {
if (g_strcmp0 (gst_structure_get_string (mstructure, "reason"), "Seek")) {
GST_INFO_OBJECT (timeline,
"A composition is starting an update because of %s"
" not considering async", gst_structure_get_string (mstructure,
"reason"));
goto forward;
}
GST_OBJECT_LOCK (timeline);
if (timeline->priv->expected_async_done == 0) {
amessage = gst_message_new_async_start (GST_OBJECT_CAST (bin));
LOCK_DYN (timeline);
timeline->priv->expected_async_done = g_list_length (timeline->tracks);
UNLOCK_DYN (timeline);
GST_INFO_OBJECT (timeline, "Posting ASYNC_START %s",
gst_structure_get_string (mstructure, "reason"));
}
GST_OBJECT_UNLOCK (timeline);
} else if (gst_structure_has_name (mstructure, "NleCompositionUpdateDone")) {
if (g_strcmp0 (gst_structure_get_string (mstructure, "reason"), "Seek")) {
GST_INFO_OBJECT (timeline,
"A composition is done updating because of %s"
" not considering async", gst_structure_get_string (mstructure,
"reason"));
goto forward;
}
GST_OBJECT_LOCK (timeline);
timeline->priv->expected_async_done -= 1;
if (timeline->priv->expected_async_done == 0) {
amessage = gst_message_new_async_done (GST_OBJECT_CAST (bin),
GST_CLOCK_TIME_NONE);
GST_INFO_OBJECT (timeline, "Posting ASYNC_DONE %s",
gst_structure_get_string (mstructure, "reason"));
}
GST_OBJECT_UNLOCK (timeline);
}
if (amessage) {
gst_element_post_message (GST_ELEMENT_CAST (bin), amessage);
return;
}
}
forward:
gst_element_post_message (GST_ELEMENT_CAST (bin), message);
}
static GstStateChangeReturn
ges_timeline_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn res;
GESTimeline *timeline = GES_TIMELINE (element);
res = GST_ELEMENT_CLASS (ges_timeline_parent_class)->change_state (element,
transition);
if (transition == GST_STATE_CHANGE_READY_TO_PAUSED)
gst_element_post_message ((GstElement *) timeline,
gst_message_new_stream_collection ((GstObject *) timeline,
timeline->priv->stream_collection));
return res;
}
static gboolean
ges_timeline_send_event (GstElement * element, GstEvent * event)
{
GESTimeline *timeline = GES_TIMELINE (element);
if (GST_EVENT_TYPE (event) == GST_EVENT_SELECT_STREAMS) {
GList *stream_ids = NULL, *tmp, *to_remove =
ges_timeline_get_tracks (timeline);
gst_event_parse_select_streams (event, &stream_ids);
for (tmp = stream_ids; tmp; tmp = tmp->next) {
GList *trackit;
gchar *stream_id = tmp->data;
LOCK_DYN (timeline);
for (trackit = timeline->priv->priv_tracks; trackit;
trackit = trackit->next) {
TrackPrivate *tr_priv = trackit->data;
if (!g_strcmp0 (gst_stream_get_stream_id (tr_priv->stream), stream_id)) {
to_remove = g_list_remove (to_remove, tr_priv->track);
}
}
UNLOCK_DYN (timeline);
}
for (tmp = to_remove; tmp; tmp = tmp->next) {
GST_INFO_OBJECT (timeline, "Removed unselected track: %" GST_PTR_FORMAT,
tmp->data);
ges_timeline_remove_track (timeline, tmp->data);
}
g_list_free_full (stream_ids, g_free);
g_list_free (to_remove);
return TRUE;
}
return GST_ELEMENT_CLASS (ges_timeline_parent_class)->send_event (element,
event);
}
/* we collect the first result */
static gboolean
_gst_array_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer dummy)
{
gpointer array;
array = g_value_get_boxed (handler_return);
if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP))
g_value_set_boxed (return_accu, array);
return FALSE;
}
static void
ges_timeline_class_init (GESTimelineClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = (GstElementClass *) klass;
GstBinClass *bin_class = GST_BIN_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (ges_timeline_debug, "gestimeline",
GST_DEBUG_FG_YELLOW, "ges timeline");
timeline_tree_init_debug ();
parent_class = g_type_class_peek_parent (klass);
object_class->get_property = ges_timeline_get_property;
object_class->set_property = ges_timeline_set_property;
object_class->dispose = ges_timeline_dispose;
object_class->finalize = ges_timeline_finalize;
element_class->change_state = GST_DEBUG_FUNCPTR (ges_timeline_change_state);
element_class->send_event = GST_DEBUG_FUNCPTR (ges_timeline_send_event);
bin_class->handle_message = GST_DEBUG_FUNCPTR (ges_timeline_handle_message);
/**
* GESTimeline:duration:
*
* The current duration (in nanoseconds) of the timeline. A timeline
* 'starts' at time 0, so this is the maximum end time of all of its
* #GESTimelineElement-s.
*/
properties[PROP_DURATION] =
g_param_spec_uint64 ("duration", "Duration",
"The duration of the timeline", 0, G_MAXUINT64,
GST_CLOCK_TIME_NONE, G_PARAM_READABLE);
g_object_class_install_property (object_class, PROP_DURATION,
properties[PROP_DURATION]);
/**
* GESTimeline:auto-transition:
*
* Whether to automatically create a transition whenever two clips
* overlap in the timeline. See #GESLayer:auto-transition.
*/
g_object_class_install_property (object_class, PROP_AUTO_TRANSITION,
g_param_spec_boolean ("auto-transition", "Auto-Transition",
"whether the transitions are added", FALSE, G_PARAM_READWRITE));
/**
* GESTimeline:snapping-distance:
*
* The distance (in nanoseconds) at which a #GESTimelineElement being
* moved within the timeline should snap to its neighbours. Note that
* such a neighbour includes any element in the timeline, including
* across separate layers. 0 means no snapping.
*/
properties[PROP_SNAPPING_DISTANCE] =
g_param_spec_uint64 ("snapping-distance", "Snapping distance",
"Distance from which moving an object will snap with neighbours", 0,
G_MAXUINT64, 0, G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_SNAPPING_DISTANCE,
properties[PROP_SNAPPING_DISTANCE]);
/**
* GESTimeline::track-added:
* @timeline: The #GESTimeline
* @track: The track that was added to @timeline
*
* Will be emitted after the track is added to the timeline.
*
* Note that this should not be emitted whilst a timeline is being
* loaded from its #GESProject asset. You should connect to the
* project's #GESProject::loaded signal if you want to know which
* tracks were created for the timeline.
*/
ges_timeline_signals[TRACK_ADDED] =
g_signal_new ("track-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, track_added), NULL,
NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_TRACK);
/**
* GESTimeline::track-removed:
* @timeline: The #GESTimeline
* @track: The track that was removed from @timeline
*
* Will be emitted after the track is removed from the timeline.
*/
ges_timeline_signals[TRACK_REMOVED] =
g_signal_new ("track-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, track_removed),
NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_TRACK);
/**
* GESTimeline::layer-added:
* @timeline: The #GESTimeline
* @layer: The layer that was added to @timeline
*
* Will be emitted after the layer is added to the timeline.
*
* Note that this should not be emitted whilst a timeline is being
* loaded from its #GESProject asset. You should connect to the
* project's #GESProject::loaded signal if you want to know which
* layers were created for the timeline.
*/
ges_timeline_signals[LAYER_ADDED] =
g_signal_new ("layer-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, layer_added), NULL,
NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_LAYER);
/**
* GESTimeline::layer-removed:
* @timeline: The #GESTimeline
* @layer: The layer that was removed from @timeline
*
* Will be emitted after the layer is removed from the timeline.
*/
ges_timeline_signals[LAYER_REMOVED] =
g_signal_new ("layer-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, layer_removed),
NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_LAYER);
/**
* GESTimeline::group-added
* @timeline: The #GESTimeline
* @group: The group that was added to @timeline
*
* Will be emitted after the group is added to to the timeline. This can
* happen when grouping with `ges_container_group`, or by adding
* containers to a newly created group.
*
* Note that this should not be emitted whilst a timeline is being
* loaded from its #GESProject asset. You should connect to the
* project's #GESProject::loaded signal if you want to know which groups
* were created for the timeline.
*/
ges_timeline_signals[GROUP_ADDED] =
g_signal_new ("group-added", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, group_added), NULL,
NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_GROUP);
/**
* GESTimeline::group-removed
* @timeline: The #GESTimeline
* @group: The group that was removed from @timeline
* @children: (element-type GESContainer) (transfer none): A list
* of #GESContainer-s that _were_ the children of the removed @group
*
* Will be emitted after the group is removed from the timeline through
* `ges_container_ungroup`. Note that @group will no longer contain its
* former children, these are held in @children.
*
* Note that if a group is emptied, then it will no longer belong to the
* timeline, but this signal will **not** be emitted in such a case.
*/
ges_timeline_signals[GROUP_REMOVED] =
g_signal_new ("group-removed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, group_removed),
NULL, NULL, NULL, G_TYPE_NONE, 2, GES_TYPE_GROUP, G_TYPE_PTR_ARRAY);
/**
* GESTimeline::snapping-started:
* @timeline: The #GESTimeline
* @obj1: The first element that is snapping
* @obj2: The second element that is snapping
* @position: The position where the two objects will snap to
*
* Will be emitted whenever an element's movement invokes a snapping
* event (usually by its controlling #GESClip being moved) because its
* start or end point lies within the #GESTimeline:snapping-distance of
* another element's start or end point.
*/
ges_timeline_signals[SNAPING_STARTED] =
g_signal_new ("snapping-started", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL,
G_TYPE_NONE, 3, GES_TYPE_TRACK_ELEMENT, GES_TYPE_TRACK_ELEMENT,
G_TYPE_UINT64);
/**
* GESTimeline::snapping-ended:
* @timeline: The #GESTimeline
* @obj1: The first element that was snapping
* @obj2: The second element that was snapping
* @position: The position where the two objects were to be snapped to
*
* Will be emitted whenever a snapping event ends. After a snap event
* has started (see #GESTimeline::snapping-started), it can end because
* the element whose movement created the snap event has since moved
* outside of the #GESTimeline:snapping-distance before its position was
* committed. It can also end because the element's movement was ended
* by a timeline being committed.
*/
ges_timeline_signals[SNAPING_ENDED] =
g_signal_new ("snapping-ended", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL,
G_TYPE_NONE, 3, GES_TYPE_TRACK_ELEMENT, GES_TYPE_TRACK_ELEMENT,
G_TYPE_UINT64);
/**
* GESTimeline::select-tracks-for-object:
* @timeline: The #GESTimeline
* @clip: The clip that @track_element is being added to
* @track_element: The element being added
*
* This will be emitted whenever a new track element is added to a
* clip within the timeline.
*
* Connect to this signal once if you wish to control which element
* should be added to which track. Doing so will overwrite the default
* behaviour, which adds @track_element to all tracks whose
* #GESTrack:track-type includes the @track_element's
* #GESTrackElement:track-type.
*
* If you wish to use this, you should add all necessary tracks to the
* timeline before adding any clips. In particular, this signal is
* **not** re-emitted for the existing clips when a new track is added
* to the timeline.
*
* Returns: (transfer full) (element-type GESTrack): An array of
* #GESTrack-s that @track_element should be added to. If this contains
* more than one track, a copy of @track_element will be added to the
* other tracks. If this is empty, @track_element will also be removed
* from @clip.
*/
ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT] =
g_signal_new ("select-tracks-for-object", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, _gst_array_accumulator, NULL, NULL,
G_TYPE_PTR_ARRAY, 2, GES_TYPE_CLIP, GES_TYPE_TRACK_ELEMENT);
/**
* GESTimeline::commited:
* @timeline: The #GESTimeline
*
* This signal will be emitted once the changes initiated by
* ges_timeline_commit() have been executed in the backend. Use
* ges_timeline_commit_sync() if you do not want to have to connect
* to this signal.
*/
ges_timeline_signals[COMMITED] =
g_signal_new ("commited", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0);
}
static void
ges_timeline_init (GESTimeline * self)
{
GESTimelinePrivate *priv = self->priv;
self->priv = ges_timeline_get_instance_private (self);
self->priv->tree = g_node_new (self);
priv = self->priv;
self->layers = NULL;
self->tracks = NULL;
self->priv->duration = 0;
self->priv->auto_transition = FALSE;
priv->snapping_distance = 0;
priv->expected_async_done = 0;
priv->expected_commited = 0;
self->priv->last_snap_ts = GST_CLOCK_TIME_NONE;
priv->priv_tracks = NULL;
priv->needs_transitions_update = TRUE;
priv->all_elements =
g_hash_table_new_full (g_str_hash, g_str_equal, g_free, gst_object_unref);
priv->stream_start_group_id = -1;
priv->stream_collection = gst_stream_collection_new (NULL);
g_signal_connect_after (self, "select-tracks-for-object",
G_CALLBACK (select_tracks_for_object_default), NULL);
g_rec_mutex_init (&priv->dyn_mutex);
g_mutex_init (&priv->commited_lock);
priv->valid_thread = g_thread_self ();
}
/* Private methods */
/* Sorting utils*/
static gint
sort_layers (gpointer a, gpointer b)
{
GESLayer *layer_a, *layer_b;
guint prio_a, prio_b;
layer_a = GES_LAYER (a);
layer_b = GES_LAYER (b);
prio_a = ges_layer_get_priority (layer_a);
prio_b = ges_layer_get_priority (layer_b);
if ((gint) prio_a > (guint) prio_b)
return 1;
if ((guint) prio_a < (guint) prio_b)
return -1;
return 0;
}
static void
_resync_layers (GESTimeline * timeline)
{
GList *tmp;
gint i = 0;
timeline->priv->resyncing_layers = TRUE;
for (tmp = timeline->layers; tmp; tmp = tmp->next) {
layer_set_priority (tmp->data, i, TRUE);
i++;
}
timeline->priv->resyncing_layers = FALSE;
}
void
timeline_update_duration (GESTimeline * timeline)
{
GstClockTime duration = timeline_tree_get_duration (timeline->priv->tree);
if (timeline->priv->duration != duration) {
GST_DEBUG ("track duration : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (duration),
GST_TIME_ARGS (timeline->priv->duration));
timeline->priv->duration = duration;
g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]);
}
}
static gint
custom_find_track (TrackPrivate * tr_priv, GESTrack * track)
{
if (tr_priv->track == track)
return 0;
return -1;
}
static void
_destroy_auto_transition_cb (GESAutoTransition * auto_transition,
GESTimeline * timeline)
{
GESTimelinePrivate *priv = timeline->priv;
GESClip *transition = auto_transition->transition_clip;
GESLayer *layer = ges_clip_get_layer (transition);
ges_layer_remove_clip (layer, transition);
g_signal_handlers_disconnect_by_func (auto_transition,
_destroy_auto_transition_cb, timeline);
priv->auto_transitions =
g_list_remove (priv->auto_transitions, auto_transition);
gst_object_unref (auto_transition);
}
GESAutoTransition *
ges_timeline_create_transition (GESTimeline * timeline,
GESTrackElement * previous, GESTrackElement * next, GESClip * transition,
GESLayer * layer, guint64 start, guint64 duration)
{
GESAsset *asset;
GESAutoTransition *auto_transition;
if (transition == NULL) {
/* TODO make it possible to specify a Transition asset in the API */
asset = ges_asset_request (GES_TYPE_TRANSITION_CLIP, "crossfade", NULL);
transition =
ges_layer_add_asset (layer, asset, start, 0, duration,
ges_track_element_get_track_type (next));
g_object_unref (asset);
} else {
GST_DEBUG_OBJECT (timeline,
"Reusing already existing transition: %" GST_PTR_FORMAT, transition);
}
/* We know there is only 1 TrackElement */
auto_transition =
ges_auto_transition_new (GES_CONTAINER_CHILDREN (transition)->data,
previous, next);
g_signal_connect (auto_transition, "destroy-me",
G_CALLBACK (_destroy_auto_transition_cb), timeline);
timeline->priv->auto_transitions =
g_list_prepend (timeline->priv->auto_transitions, auto_transition);
return auto_transition;
}
GESAutoTransition *
ges_timeline_find_auto_transition (GESTimeline * timeline,
GESTrackElement * prev, GESTrackElement * next,
GstClockTime transition_duration)
{
GList *tmp;
for (tmp = timeline->priv->auto_transitions; tmp; tmp = tmp->next) {
GESAutoTransition *auto_trans = (GESAutoTransition *) tmp->data;
/* We already have a transition linked to one of the elements we want to
* find a transition for */
if (auto_trans->previous_source == prev || auto_trans->next_source == next) {
if (auto_trans->previous_source != prev
|| auto_trans->next_source != next) {
GST_ERROR_OBJECT (timeline, "Failed creating auto transition, "
" trying to have 3 clips overlapping, rolling back");
}
return auto_trans;
}
}
return NULL;
}
static GESAutoTransition *
_create_auto_transition_from_transitions (GESTimeline * timeline,
GESTrackElement * prev, GESTrackElement * next,
GstClockTime transition_duration)
{
GList *tmp, *elements;
GESLayer *layer;
guint32 layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (prev);
GESTrack *track;
GESAutoTransition *auto_transition =
ges_timeline_find_auto_transition (timeline, prev, next,
transition_duration);
if (auto_transition)
return auto_transition;
layer = ges_timeline_get_layer (timeline, layer_prio);
track = ges_track_element_get_track (prev);
elements = ges_track_get_elements (track);
for (tmp = elements; tmp; tmp = tmp->next) {
GESTrackElement *maybe_transition = tmp->data;
if (ges_timeline_element_get_layer_priority (tmp->data) != layer_prio)
continue;
if (_START (maybe_transition) > _START (next))
break;
else if (_START (maybe_transition) != _START (next) ||
_DURATION (maybe_transition) != transition_duration)
continue;
else if (GES_IS_TRANSITION (maybe_transition)) {
/* Use that transition */
/* TODO We should make sure that the transition contains only
* TrackElement-s in @track and if it is not the case properly unlink the
* object to use it */
auto_transition = ges_timeline_create_transition (timeline, prev, next,
GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (maybe_transition)), layer,
_START (next), transition_duration);
break;
}
}
gst_object_unref (layer);
g_list_free_full (elements, gst_object_unref);
return auto_transition;
}
void
ges_timeline_emit_snapping (GESTimeline * timeline, GESTimelineElement * elem1,
GESTimelineElement * elem2, GstClockTime snap_time)
{
GESTimelinePrivate *priv = timeline->priv;
GstClockTime last_snap_ts = timeline->priv->last_snap_ts;
if (!GST_CLOCK_TIME_IS_VALID (snap_time)) {
if (priv->last_snaped1 != NULL && priv->last_snaped2 != NULL) {
g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0,
priv->last_snaped1, priv->last_snaped2, last_snap_ts);
priv->last_snaped1 = NULL;
priv->last_snaped2 = NULL;
priv->last_snap_ts = GST_CLOCK_TIME_NONE;
}
return;
}
g_assert (elem1 != elem2);
if (GES_IS_CLIP (elem1)) {
g_assert (GES_CONTAINER_CHILDREN (elem1));
elem1 = GES_CONTAINER_CHILDREN (elem1)->data;
}
if (GES_IS_CLIP (elem2)) {
g_assert (GES_CONTAINER_CHILDREN (elem2));
elem2 = GES_CONTAINER_CHILDREN (elem2)->data;
}
if (last_snap_ts != snap_time) {
g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0,
priv->last_snaped1, priv->last_snaped2, (last_snap_ts));
/* We want the snap start signal to be emited anyway */
timeline->priv->last_snap_ts = GST_CLOCK_TIME_NONE;
}
if (!GST_CLOCK_TIME_IS_VALID (timeline->priv->last_snap_ts)) {
priv->last_snaped1 = (GESTrackElement *) elem1;
priv->last_snaped2 = (GESTrackElement *) elem2;
timeline->priv->last_snap_ts = snap_time;
g_signal_emit (timeline, ges_timeline_signals[SNAPING_STARTED], 0,
elem1, elem2, snap_time);
}
}
/* Accept @self == NULL, making it use default framerate */
void
timeline_get_framerate (GESTimeline * self, gint * fps_n, gint * fps_d)
{
GList *tmp;
if (!self)
goto done;
*fps_n = *fps_d = -1;
LOCK_DYN (self);
for (tmp = self->tracks; tmp; tmp = tmp->next) {
if (GES_IS_VIDEO_TRACK (tmp->data)) {
GstCaps *restriction = ges_track_get_restriction_caps (tmp->data);
gint i;
if (!restriction)
continue;
for (i = 0; i < gst_caps_get_size (restriction); i++) {
gint n, d;
if (!gst_structure_get_fraction (gst_caps_get_structure (restriction,
i), "framerate", &n, &d))
continue;
if (*fps_n != -1 && *fps_d != -1 && !(n == *fps_n && d == *fps_d)) {
GST_WARNING_OBJECT (self,
"Various framerates specified, this is not supported"
" First one will be used.");
continue;
}
*fps_n = n;
*fps_d = d;
}
gst_caps_unref (restriction);
}
}
UNLOCK_DYN (self);
done:
if (*fps_n == -1 && *fps_d == -1) {
GST_INFO_OBJECT (self,
"No framerate found, using default " G_STRINGIFY (FRAMERATE_N) "/ "
G_STRINGIFY (FRAMERATE_D));
*fps_n = DEFAULT_FRAMERATE_N;
*fps_d = DEFAULT_FRAMERATE_D;
}
}
gboolean
ges_timeline_trim_object_simple (GESTimeline * timeline,
GESTimelineElement * element, guint32 new_layer_priority,
GList * layers, GESEdge edge, guint64 position, gboolean snapping)
{
return timeline_trim_object (timeline, element, new_layer_priority, layers,
edge, position);
}
gboolean
timeline_ripple_object (GESTimeline * timeline, GESTimelineElement * obj,
gint new_layer_priority, GList * layers, GESEdge edge, guint64 position)
{
gboolean res = TRUE;
guint64 new_duration;
GstClockTimeDiff diff;
switch (edge) {
case GES_EDGE_NONE:
GST_DEBUG ("Simply rippling");
diff = GST_CLOCK_DIFF (position, _START (obj));
timeline->priv->needs_transitions_update = FALSE;
res = timeline_tree_ripple (timeline->priv->tree,
(gint64) GES_TIMELINE_ELEMENT_LAYER_PRIORITY (obj) -
(gint64) new_layer_priority, diff, obj,
GES_EDGE_NONE, timeline->priv->snapping_distance);
timeline->priv->needs_transitions_update = TRUE;
break;
case GES_EDGE_END:
GST_DEBUG ("Rippling end");
timeline->priv->needs_transitions_update = FALSE;
new_duration =
CLAMP (position - obj->start, 0, obj->maxduration - obj->inpoint);
res =
timeline_tree_ripple (timeline->priv->tree,
(gint64) GES_TIMELINE_ELEMENT_LAYER_PRIORITY (obj) -
(gint64) new_layer_priority,
_DURATION (obj) - new_duration, obj,
GES_EDGE_END, timeline->priv->snapping_distance);
timeline->priv->needs_transitions_update = TRUE;
GST_DEBUG ("Done Rippling end");
break;
case GES_EDGE_START:
GST_INFO ("Ripple start doesn't make sense, trimming instead");
if (!timeline_trim_object (timeline, obj, -1, layers, edge, position))
goto error;
break;
default:
GST_DEBUG ("Can not ripple edge: %i", edge);
break;
}
return res;
error:
return FALSE;
}
gboolean
timeline_slide_object (GESTimeline * timeline, GESTrackElement * obj,
GList * layers, GESEdge edge, guint64 position)
{
/* FIXME implement me! */
GST_FIXME_OBJECT (timeline, "Slide mode editing not implemented yet");
return FALSE;
}
static gboolean
_trim_transition (GESTimeline * timeline, GESTimelineElement * element,
GESEdge edge, GstClockTime position)
{
GList *tmp;
GESLayer *layer = ges_timeline_get_layer (timeline,
GES_TIMELINE_ELEMENT_LAYER_PRIORITY (element));
if (!ges_layer_get_auto_transition (layer)) {
gst_object_unref (layer);
return -1;
}
gst_object_unref (layer);
for (tmp = timeline->priv->auto_transitions; tmp; tmp = tmp->next) {
GESAutoTransition *auto_transition = tmp->data;
if (GES_TIMELINE_ELEMENT (auto_transition->transition) == element ||
GES_TIMELINE_ELEMENT (auto_transition->transition_clip) == element) {
/* Trimming an auto transition means trimming its neighboors */
if (!auto_transition->positioning) {
if (edge == GES_EDGE_END) {
ges_container_edit (GES_CONTAINER (auto_transition->previous_clip),
NULL, -1, GES_EDIT_MODE_TRIM, GES_EDGE_END, position);
} else {
ges_container_edit (GES_CONTAINER (auto_transition->next_clip),
NULL, -1, GES_EDIT_MODE_TRIM, GES_EDGE_START, position);
}
return TRUE;
}
return FALSE;
}
}
return FALSE;
}
gboolean
timeline_trim_object (GESTimeline * timeline, GESTimelineElement * object,
guint32 new_layer_priority, GList * layers, GESEdge edge, guint64 position)
{
if ((GES_IS_TRANSITION (object) || GES_IS_TRANSITION_CLIP (object)) &&
!ELEMENT_FLAG_IS_SET (object, GES_TIMELINE_ELEMENT_SET_SIMPLE)) {
return _trim_transition (timeline, object, edge, position);
}
return timeline_tree_trim (timeline->priv->tree,
GES_TIMELINE_ELEMENT (object), new_layer_priority < 0 ? 0 : (gint64)
ges_timeline_element_get_layer_priority (GES_TIMELINE_ELEMENT (object)) -
new_layer_priority, edge == GES_EDGE_END ? GST_CLOCK_DIFF (position,
_START (object) + _DURATION (object)) : GST_CLOCK_DIFF (position,
GES_TIMELINE_ELEMENT_START (object)), edge,
timeline->priv->snapping_distance);
}
gboolean
timeline_roll_object (GESTimeline * timeline, GESTimelineElement * element,
GList * layers, GESEdge edge, guint64 position)
{
return timeline_tree_roll (timeline->priv->tree,
element,
(edge == GES_EDGE_END) ?
GST_CLOCK_DIFF (position, _END (element)) :
GST_CLOCK_DIFF (position, _START (element)),
edge, timeline->priv->snapping_distance);
}
gboolean
timeline_move_object (GESTimeline * timeline, GESTimelineElement * object,
guint32 new_layer_priority, GList * layers, GESEdge edge, guint64 position)
{
gboolean ret = FALSE;
GstClockTimeDiff offset = edge == GES_EDGE_END ?
GST_CLOCK_DIFF (position, _START (object) + _DURATION (object)) :
GST_CLOCK_DIFF (position, GES_TIMELINE_ELEMENT_START (object));
ret = timeline_tree_move (timeline->priv->tree,
GES_TIMELINE_ELEMENT (object), new_layer_priority < 0 ? 0 : (gint64)
ges_timeline_element_get_layer_priority (GES_TIMELINE_ELEMENT (object)) -
new_layer_priority, offset, edge, timeline->priv->snapping_distance);
return ret;
}
gboolean
ges_timeline_move_object_simple (GESTimeline * timeline,
GESTimelineElement * element, GList * layers, GESEdge edge,
guint64 position)
{
return timeline_move_object (timeline, element,
ges_timeline_element_get_layer_priority (element), NULL, edge, position);
}
void
timeline_add_group (GESTimeline * timeline, GESGroup * group)
{
GST_DEBUG_OBJECT (timeline, "Adding group %" GST_PTR_FORMAT, group);
timeline->priv->groups = g_list_prepend (timeline->priv->groups,
gst_object_ref_sink (group));
ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (group), timeline);
}
void
timeline_update_transition (GESTimeline * timeline)
{
GList *tmp, *auto_transs;
auto_transs = g_list_copy (timeline->priv->auto_transitions);
for (tmp = auto_transs; tmp; tmp = tmp->next)
ges_auto_transition_update (tmp->data);
g_list_free (auto_transs);
}
/**
* timeline_emit_group_added:
* @timeline: The #GESTimeline
* @group: group that was added
*
* Emit group-added signal.
*/
void
timeline_emit_group_added (GESTimeline * timeline, GESGroup * group)
{
g_signal_emit (timeline, ges_timeline_signals[GROUP_ADDED], 0, group);
}
/**
* timeline_emit_group_removed:
* @timeline: The #GESTimeline
* @group: group that was removed
*
* Emit group-removed signal.
*/
void
timeline_emit_group_removed (GESTimeline * timeline, GESGroup * group,
GPtrArray * array)
{
g_signal_emit (timeline, ges_timeline_signals[GROUP_REMOVED], 0, group,
array);
}
void
timeline_remove_group (GESTimeline * timeline, GESGroup * group)
{
GST_DEBUG_OBJECT (timeline, "Removing group %" GST_PTR_FORMAT, group);
timeline->priv->groups = g_list_remove (timeline->priv->groups, group);
ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (group), NULL);
gst_object_unref (group);
}
static GPtrArray *
select_tracks_for_object_default (GESTimeline * timeline,
GESClip * clip, GESTrackElement * tr_object, gpointer user_data)
{
GPtrArray *result;
GList *tmp;
result = g_ptr_array_new ();
LOCK_DYN (timeline);
for (tmp = timeline->tracks; tmp; tmp = tmp->next) {
GESTrack *track = GES_TRACK (tmp->data);
if ((track->type & ges_track_element_get_track_type (tr_object))) {
gst_object_ref (track);
g_ptr_array_add (result, track);
}
}
UNLOCK_DYN (timeline);
return result;
}
static void
add_object_to_tracks (GESTimeline * timeline, GESClip * clip, GESTrack * track)
{
gint i;
GList *tmp, *list;
GESTrackType types, visited_type = GES_TRACK_TYPE_UNKNOWN;
GST_DEBUG_OBJECT (timeline, "Creating %" GST_PTR_FORMAT
" trackelements and adding them to our tracks", clip);
types = ges_clip_get_supported_formats (clip);
if (track) {
if ((types & track->type) == 0)
return;
types = track->type;
}
LOCK_DYN (timeline);
for (i = 0, tmp = timeline->tracks; tmp; tmp = tmp->next, i++) {
GESTrack *track = GES_TRACK (tmp->data);
/* FIXME: visited_type is essentially unused */
if (((track->type & types) == 0 || (track->type & visited_type)))
continue;
list = ges_clip_create_track_elements (clip, track->type);
g_list_free (list);
}
UNLOCK_DYN (timeline);
}
static void
layer_active_changed_cb (GESLayer * layer, gboolean active G_GNUC_UNUSED,
GPtrArray * tracks G_GNUC_UNUSED, GESTimeline * timeline)
{
timeline_tree_reset_layer_active (timeline->priv->tree, layer);
}
static void
layer_auto_transition_changed_cb (GESLayer * layer,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
GList *tmp, *clips;
timeline_tree_create_transitions (timeline->priv->tree,
_create_auto_transition_from_transitions);
clips = ges_layer_get_clips (layer);
for (tmp = clips; tmp; tmp = tmp->next) {
if (GES_IS_TRANSITION_CLIP (tmp->data)) {
GList *tmpautotrans;
gboolean found = FALSE;
for (tmpautotrans = timeline->priv->auto_transitions; tmpautotrans;
tmpautotrans = tmpautotrans->next) {
if (GES_AUTO_TRANSITION (tmpautotrans->data)->transition_clip ==
tmp->data) {
found = TRUE;
break;
}
}
if (!found) {
GST_ERROR_OBJECT (timeline,
"Transition %s could not be wrapped into an auto transition"
" REMOVING it", GES_TIMELINE_ELEMENT_NAME (tmp->data));
ges_layer_remove_clip (layer, tmp->data);
}
}
}
g_list_free_full (clips, gst_object_unref);
}
static void
clip_track_element_added_cb (GESClip * clip,
GESTrackElement * track_element, GESTimeline * timeline)
{
guint i;
GESTrack *track;
gboolean is_source;
GPtrArray *tracks = NULL;
GESTrackElement *existing_src = NULL;
if (timeline->priv->ignore_track_element_added == clip) {
GST_DEBUG_OBJECT (timeline, "Ignoring element added (%" GST_PTR_FORMAT
" in %" GST_PTR_FORMAT, track_element, clip);
return;
}
if (ges_track_element_get_track (track_element)) {
GST_WARNING_OBJECT (track_element, "Already in a track");
return;
}
g_signal_emit (G_OBJECT (timeline),
ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT], 0, clip, track_element,
&tracks);
/* FIXME: make sure each track in the list is unique */
/* FIXME: make sure each track is part of the same timeline as the clip,
* and warn and ignore the track if it isn't */
if (!tracks || tracks->len == 0) {
GST_WARNING_OBJECT (timeline, "Got no Track to add %p (type %s), removing"
" from clip (stopping 'child-added' signal emission).",
track_element, ges_track_type_name (ges_track_element_get_track_type
(track_element)));
if (tracks)
g_ptr_array_unref (tracks);
g_signal_stop_emission_by_name (clip, "child-added");
ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (track_element));
return;
}
/* We add the current element to the first track */
track = g_ptr_array_index (tracks, 0);
is_source = g_type_is_a (G_OBJECT_TYPE (track_element), GES_TYPE_SOURCE);
if (is_source)
existing_src = ges_clip_find_track_element (clip, track, GES_TYPE_SOURCE);
if (existing_src == NULL) {
if (!ges_track_add_element (track, track_element)) {
GST_WARNING_OBJECT (clip, "Failed to add track element to track");
ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (track_element));
/* FIXME: unref all the individual track in tracks */
g_ptr_array_unref (tracks);
return;
}
} else {
GST_INFO_OBJECT (clip, "Already had a Source Element in %" GST_PTR_FORMAT
" of type %s, removing new one. (stopping 'child-added' emission)",
track, G_OBJECT_TYPE_NAME (track_element));
g_signal_stop_emission_by_name (clip, "child-added");
ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (track_element));
}
gst_object_unref (track);
g_clear_object (&existing_src);
/* And create copies to add to other tracks */
timeline->priv->ignore_track_element_added = clip;
for (i = 1; i < tracks->len; i++) {
GESTrack *track;
GESTrackElement *track_element_copy;
track = g_ptr_array_index (tracks, i);
if (is_source)
existing_src = ges_clip_find_track_element (clip, track, GES_TYPE_SOURCE);
if (existing_src == NULL) {
ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (track_element));
gst_object_unref (track);
/* FIXME: tracks is needed for the next loop after continue */
g_ptr_array_unref (tracks);
continue;
} else {
GST_INFO_OBJECT (clip, "Already had a Source Element in %" GST_PTR_FORMAT
" of type %s, removing new one. (stopping 'child-added' emission)",
track, G_OBJECT_TYPE_NAME (track_element));
g_signal_stop_emission_by_name (clip, "child-added");
ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (track_element));
}
/* FIXME: in both cases track_element is removed from the clip! */
g_clear_object (&existing_src);
track_element_copy =
GES_TRACK_ELEMENT (ges_timeline_element_copy (GES_TIMELINE_ELEMENT
(track_element), FALSE));
if (ges_track_element_get_owners (track_element))
ges_track_element_add_owner (track_element_copy, clip);
GST_LOG_OBJECT (timeline, "Trying to add %p to track %p",
track_element_copy, track);
if (!ges_container_add (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (track_element_copy))) {
GST_WARNING_OBJECT (clip, "Failed to add track element to clip");
gst_object_unref (track_element_copy);
/* FIXME: unref **all** the individual track in tracks */
g_ptr_array_unref (tracks);
return;
}
if (!ges_track_add_element (track, track_element_copy)) {
GST_WARNING_OBJECT (clip, "Failed to add track element to track");
ges_container_remove (GES_CONTAINER (clip),
GES_TIMELINE_ELEMENT (track_element_copy));
/* FIXME: should we also stop the child-added and child-removed
* emissions? */
gst_object_unref (track_element_copy);
/* FIXME: unref **all** the individual track in tracks */
g_ptr_array_unref (tracks);
return;
}
gst_object_unref (track);
}
timeline->priv->ignore_track_element_added = NULL;
g_ptr_array_unref (tracks);
if (GES_IS_SOURCE (track_element))
timeline_tree_create_transitions (timeline->priv->tree,
ges_timeline_find_auto_transition);
}
static void
clip_track_element_removed_cb (GESClip * clip,
GESTrackElement * track_element, GESTimeline * timeline)
{
GESTrack *track = ges_track_element_get_track (track_element);
if (track)
ges_track_remove_element (track, track_element);
}
static void
layer_object_added_cb (GESLayer * layer, GESClip * clip, GESTimeline * timeline)
{
GESProject *project;
/* We make sure not to be connected twice */
g_signal_handlers_disconnect_by_func (clip, clip_track_element_added_cb,
timeline);
g_signal_handlers_disconnect_by_func (clip, clip_track_element_removed_cb,
timeline);
/* And we connect to the object */
g_signal_connect (clip, "child-added",
G_CALLBACK (clip_track_element_added_cb), timeline);
g_signal_connect (clip, "child-removed",
G_CALLBACK (clip_track_element_removed_cb), timeline);
if (ges_clip_is_moving_from_layer (clip)) {
GST_DEBUG ("Clip %p moving from one layer to another, not creating "
"TrackElement", clip);
timeline_tree_create_transitions (timeline->priv->tree,
ges_timeline_find_auto_transition);
return;
}
add_object_to_tracks (timeline, clip, NULL);
GST_DEBUG ("Making sure that the asset is in our project");
project =
GES_PROJECT (ges_extractable_get_asset (GES_EXTRACTABLE (timeline)));
ges_project_add_asset (project,
ges_extractable_get_asset (GES_EXTRACTABLE (clip)));
GST_DEBUG ("Done");
}
static void
layer_priority_changed_cb (GESLayer * layer,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
if (timeline->priv->resyncing_layers)
return;
timeline->layers = g_list_sort (timeline->layers, (GCompareFunc)
sort_layers);
}
static void
layer_object_removed_cb (GESLayer * layer, GESClip * clip,
GESTimeline * timeline)
{
GList *trackelements, *tmp;
if (ges_clip_is_moving_from_layer (clip)) {
GST_DEBUG ("Clip %p is moving from a layer to another, not doing"
" anything on it", clip);
return;
}
GST_DEBUG_OBJECT (timeline, "Clip %" GES_FORMAT " removed from layer %p",
GES_ARGS (clip), layer);
/* Go over the clip's track element and figure out which one belongs to
* the list of tracks we control */
trackelements = ges_container_get_children (GES_CONTAINER (clip), FALSE);
for (tmp = trackelements; tmp; tmp = tmp->next) {
GESTrackElement *track_element = (GESTrackElement *) tmp->data;
GESTrack *track = ges_track_element_get_track (track_element);
if (!track)
continue;
GST_DEBUG_OBJECT (timeline, "Trying to remove TrackElement %p",
track_element);
/* FIXME Check if we should actually check that we control the
* track in the new management of TrackElement context */
LOCK_DYN (timeline);
if (G_LIKELY (g_list_find_custom (timeline->priv->priv_tracks, track,
(GCompareFunc) custom_find_track) || track == NULL)) {
GST_DEBUG ("Belongs to one of the tracks we control");
ges_track_remove_element (track, track_element);
}
UNLOCK_DYN (timeline);
}
g_signal_handlers_disconnect_by_func (clip, clip_track_element_added_cb,
timeline);
g_signal_handlers_disconnect_by_func (clip, clip_track_element_removed_cb,
timeline);
g_list_free_full (trackelements, gst_object_unref);
GST_DEBUG ("Done");
}
static gboolean
update_stream_object (TrackPrivate * tr_priv)
{
gboolean res = FALSE;
GstStreamType type = GST_STREAM_TYPE_UNKNOWN;
gchar *stream_id;
g_object_get (tr_priv->track, "id", &stream_id, NULL);
if (tr_priv->track->type == GES_TRACK_TYPE_VIDEO)
type = GST_STREAM_TYPE_VIDEO;
if (tr_priv->track->type == GES_TRACK_TYPE_AUDIO)
type = GST_STREAM_TYPE_AUDIO;
if (!tr_priv->stream ||
g_strcmp0 (stream_id, gst_stream_get_stream_id (tr_priv->stream))) {
res = TRUE;
gst_object_replace ((GstObject **) & tr_priv->stream,
(GstObject *) gst_stream_new (stream_id,
(GstCaps *) ges_track_get_caps (tr_priv->track),
type, GST_STREAM_FLAG_NONE)
);
}
g_free (stream_id);
return res;
}
static void
trackelement_start_changed_cb (GESTrackElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
timeline_update_duration (timeline);
}
static void
track_element_added_cb (GESTrack * track, GESTrackElement * track_element,
GESTimeline * timeline)
{
/* Auto transition should be updated before we receive the signal */
g_signal_connect_after (GES_TRACK_ELEMENT (track_element), "notify::start",
G_CALLBACK (trackelement_start_changed_cb), timeline);
}
static void
track_element_removed_cb (GESTrack * track,
GESTrackElement * track_element, GESTimeline * timeline)
{
/* Disconnect all signal handlers */
g_signal_handlers_disconnect_by_func (track_element,
trackelement_start_changed_cb, timeline);
}
static GstPadProbeReturn
_pad_probe_cb (GstPad * mixer_pad, GstPadProbeInfo * info,
TrackPrivate * tr_priv)
{
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
GESTimeline *timeline = tr_priv->timeline;
if (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START) {
LOCK_DYN (timeline);
if (timeline->priv->stream_start_group_id == -1) {
if (!gst_event_parse_group_id (event,
&timeline->priv->stream_start_group_id))
timeline->priv->stream_start_group_id = gst_util_group_id_next ();
}
gst_event_unref (event);
event = info->data =
gst_event_new_stream_start (gst_stream_get_stream_id (tr_priv->stream));
gst_event_set_stream (event, tr_priv->stream);
gst_event_set_group_id (event, timeline->priv->stream_start_group_id);
UNLOCK_DYN (timeline);
return GST_PAD_PROBE_REMOVE;
}
return GST_PAD_PROBE_OK;
}
static void
_ghost_track_srcpad (TrackPrivate * tr_priv)
{
GstPad *pad;
gchar *padname;
gboolean no_more;
GList *tmp;
GESTrack *track = tr_priv->track;
pad = gst_element_get_static_pad (GST_ELEMENT (track), "src");
GST_DEBUG ("track:%p, pad:%s:%s", track, GST_DEBUG_PAD_NAME (pad));
/* Remember the pad */
LOCK_DYN (tr_priv->timeline);
GST_OBJECT_LOCK (track);
tr_priv->pad = pad;
no_more = TRUE;
for (tmp = tr_priv->timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
if (!tr_priv->pad) {
GST_LOG ("Found track without pad %p", tr_priv->track);
no_more = FALSE;
}
}
GST_OBJECT_UNLOCK (track);
/* ghost it ! */
GST_DEBUG ("Ghosting pad and adding it to ourself");
padname = g_strdup_printf ("track_%p_src", track);
tr_priv->ghostpad = gst_ghost_pad_new (padname, pad);
g_free (padname);
gst_pad_set_active (tr_priv->ghostpad, TRUE);
gst_element_add_pad (GST_ELEMENT (tr_priv->timeline), tr_priv->ghostpad);
if (no_more) {
GST_DEBUG ("Signaling no-more-pads");
gst_element_no_more_pads (GST_ELEMENT (tr_priv->timeline));
}
tr_priv->probe_id = gst_pad_add_probe (pad,
GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
(GstPadProbeCallback) _pad_probe_cb, tr_priv, NULL);
UNLOCK_DYN (tr_priv->timeline);
}
gboolean
timeline_add_element (GESTimeline * timeline, GESTimelineElement * element)
{
/* FIXME: handle NULL element->name */
GESTimelineElement *same_name =
g_hash_table_lookup (timeline->priv->all_elements,
element->name);
GST_DEBUG_OBJECT (timeline, "Adding element: %s", element->name);
if (same_name) {
GST_ERROR_OBJECT (timeline, "%s Already in the timeline %" GST_PTR_FORMAT,
element->name, same_name);
return FALSE;
}
/* FIXME: why is the hash table using the name of the element, rather than
* the pointer to the element itself as the key? This makes it awkward
* to change the name of an element after it has been added. See
* ges_timeline_element_set_name. It means we have to remove and then
* re-add the element. */
g_hash_table_insert (timeline->priv->all_elements,
ges_timeline_element_get_name (element), gst_object_ref (element));
timeline_tree_track_element (timeline->priv->tree, element);
return TRUE;
}
gboolean
timeline_remove_element (GESTimeline * timeline, GESTimelineElement * element)
{
if (g_hash_table_remove (timeline->priv->all_elements, element->name)) {
timeline_tree_stop_tracking_element (timeline->priv->tree, element);
return TRUE;
}
return FALSE;
}
void
timeline_fill_gaps (GESTimeline * timeline)
{
GList *tmp;
LOCK_DYN (timeline);
for (tmp = timeline->tracks; tmp; tmp = tmp->next) {
track_resort_and_fill_gaps (tmp->data);
}
UNLOCK_DYN (timeline);
}
GNode *
timeline_get_tree (GESTimeline * timeline)
{
return timeline->priv->tree;
}
/**** API *****/
/**
* ges_timeline_new:
*
* Creates a new empty timeline.
*
* Returns: (transfer floating): The new timeline.
*/
GESTimeline *
ges_timeline_new (void)
{
GESProject *project = ges_project_new (NULL);
GESExtractable *timeline = g_object_new (GES_TYPE_TIMELINE, NULL);
ges_extractable_set_asset (timeline, GES_ASSET (project));
gst_object_unref (project);
return GES_TIMELINE (timeline);
}
/**
* ges_timeline_new_from_uri:
* @uri: The URI to load from
* @error: (out) (allow-none): An error to be set if loading fails, or
* %NULL to ignore
*
* Creates a timeline from the given URI.
*
* Returns: (transfer floating) (nullable): A new timeline if the uri was loaded
* successfully, or %NULL if the uri could not be loaded.
*/
GESTimeline *
ges_timeline_new_from_uri (const gchar * uri, GError ** error)
{
GESTimeline *ret;
GESProject *project = ges_project_new (uri);
ret = GES_TIMELINE (ges_asset_extract (GES_ASSET (project), error));
gst_object_unref (project);
return ret;
}
/**
* ges_timeline_load_from_uri:
* @timeline: An empty #GESTimeline into which to load the formatter
* @uri: The URI to load from
* @error: (out) (allow-none): An error to be set if loading fails, or
* %NULL to ignore
*
* Loads the contents of URI into the timeline.
*
* Returns: %TRUE if the timeline was loaded successfully from @uri.
*/
gboolean
ges_timeline_load_from_uri (GESTimeline * timeline, const gchar * uri,
GError ** error)
{
GESProject *project;
gboolean ret = FALSE;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail ((ges_extractable_get_asset (GES_EXTRACTABLE
(timeline)) == NULL), FALSE);
project = ges_project_new (uri);
ret = ges_project_load (project, timeline, error);
gst_object_unref (project);
return ret;
}
/**
* ges_timeline_save_to_uri:
* @timeline: The #GESTimeline
* @uri: The location to save to
* @formatter_asset: (allow-none): The formatter asset to use, or %NULL
* @overwrite: %TRUE to overwrite file if it exists
* @error: (out) (allow-none): An error to be set if saving fails, or
* %NULL to ignore
*
* Saves the timeline to the given location. If @formatter_asset is %NULL,
* the method will attempt to save in the same format the timeline was
* loaded from, before defaulting to the formatter with highest rank.
*
* Returns: %TRUE if @timeline was successfully saved to @uri.
*/
gboolean
ges_timeline_save_to_uri (GESTimeline * timeline, const gchar * uri,
GESAsset * formatter_asset, gboolean overwrite, GError ** error)
{
GESProject *project;
gboolean ret, created_proj = FALSE;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
project =
GES_PROJECT (ges_extractable_get_asset (GES_EXTRACTABLE (timeline)));
if (project == NULL) {
project = ges_project_new (NULL);
created_proj = TRUE;
}
ret = ges_project_save (project, timeline, uri, formatter_asset, overwrite,
error);
if (created_proj)
gst_object_unref (project);
return ret;
}
/**
* ges_timeline_get_groups:
* @timeline: The #GESTimeline
*
* Get the list of #GESGroup-s present in the timeline.
*
* Returns: (transfer none) (element-type GESGroup): The list of
* groups that contain clips present in @timeline's layers.
* Must not be changed.
*/
GList *
ges_timeline_get_groups (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
return timeline->priv->groups;
}
/**
* ges_timeline_append_layer:
* @timeline: The #GESTimeline
*
* Append a newly created layer to the timeline. The layer will
* be added at the lowest #GESLayer:priority (numerically, the highest).
*
* Returns: (transfer none): The newly created layer.
*/
GESLayer *
ges_timeline_append_layer (GESTimeline * timeline)
{
guint32 priority;
GESLayer *layer;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
layer = ges_layer_new ();
priority = g_list_length (timeline->layers);
/* FIXME: if a timeline contains 2 layers with priority 0 and 2, then
* this will set the layer priority of the new layer to 2 as well! */
ges_layer_set_priority (layer, priority);
ges_timeline_add_layer (timeline, layer);
return layer;
}
/**
* ges_timeline_add_layer:
* @timeline: The #GESTimeline
* @layer: (transfer floating): The layer to add
*
* Add a layer to the timeline.
*
* Deprecated: 1.18: This method requires you to ensure the layer's
* #GESLayer:priority will be unique to the timeline. Use
* ges_timeline_append_layer() and ges_timeline_move_layer() instead.
*
* Returns: %TRUE if @layer was properly added.
*/
gboolean
ges_timeline_add_layer (GESTimeline * timeline, GESLayer * layer)
{
gboolean auto_transition;
GList *objects, *tmp;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
CHECK_THREAD (timeline);
GST_DEBUG ("timeline:%p, layer:%p", timeline, layer);
/* We can only add a layer that doesn't already belong to another timeline */
if (G_UNLIKELY (layer->timeline)) {
GST_WARNING ("Layer belongs to another timeline, can't add it");
gst_object_ref_sink (layer);
gst_object_unref (layer);
return FALSE;
}
/* Add to the list of layers, make sure we don't already control it */
if (G_UNLIKELY (g_list_find (timeline->layers, (gconstpointer) layer))) {
GST_WARNING ("Layer is already controlled by this timeline");
gst_object_ref_sink (layer);
gst_object_unref (layer);
return FALSE;
}
/* FIXME: ensure the layer->priority does not conflict with an existing
* layer in the timeline. Currently can add several layers with equal
* layer priorities */
auto_transition = ges_layer_get_auto_transition (layer);
/* If the user doesn't explicitely set layer auto_transition, then set our */
if (!auto_transition) {
auto_transition = ges_timeline_get_auto_transition (timeline);
ges_layer_set_auto_transition (layer, auto_transition);
}
gst_object_ref_sink (layer);
timeline->layers = g_list_insert_sorted (timeline->layers, layer,
(GCompareFunc) sort_layers);
/* Inform the layer that it belongs to a new timeline */
ges_layer_set_timeline (layer, timeline);
/* Connect to 'clip-added'/'clip-removed' signal from the new layer */
g_signal_connect_after (layer, "clip-added",
G_CALLBACK (layer_object_added_cb), timeline);
g_signal_connect_after (layer, "clip-removed",
G_CALLBACK (layer_object_removed_cb), timeline);
g_signal_connect (layer, "notify::priority",
G_CALLBACK (layer_priority_changed_cb), timeline);
g_signal_connect (layer, "notify::auto-transition",
G_CALLBACK (layer_auto_transition_changed_cb), timeline);
g_signal_connect_after (layer, "active-changed",
G_CALLBACK (layer_active_changed_cb), timeline);
GST_DEBUG ("Done adding layer, emitting 'layer-added' signal");
g_signal_emit (timeline, ges_timeline_signals[LAYER_ADDED], 0, layer);
/* add any existing clips to the timeline */
objects = ges_layer_get_clips (layer);
for (tmp = objects; tmp; tmp = tmp->next) {
layer_object_added_cb (layer, tmp->data, timeline);
gst_object_unref (tmp->data);
tmp->data = NULL;
}
g_list_free (objects);
return TRUE;
}
/**
* ges_timeline_remove_layer:
* @timeline: The #GESTimeline
* @layer: The layer to remove
*
* Removes a layer from the timeline.
*
* Returns: %TRUE if @layer was properly removed.
*/
gboolean
ges_timeline_remove_layer (GESTimeline * timeline, GESLayer * layer)
{
GList *layer_objects, *tmp;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
CHECK_THREAD (timeline);
GST_DEBUG ("timeline:%p, layer:%p", timeline, layer);
if (G_UNLIKELY (!g_list_find (timeline->layers, layer))) {
GST_WARNING ("Layer doesn't belong to this timeline");
return FALSE;
}
/* remove objects from any private data structures */
layer_objects = ges_layer_get_clips (layer);
for (tmp = layer_objects; tmp; tmp = tmp->next) {
layer_object_removed_cb (layer, GES_CLIP (tmp->data), timeline);
gst_object_unref (G_OBJECT (tmp->data));
tmp->data = NULL;
}
g_list_free (layer_objects);
/* Disconnect signals */
GST_DEBUG ("Disconnecting signal callbacks");
g_signal_handlers_disconnect_by_func (layer, layer_object_added_cb, timeline);
g_signal_handlers_disconnect_by_func (layer, layer_object_removed_cb,
timeline);
g_signal_handlers_disconnect_by_func (layer, layer_priority_changed_cb,
timeline);
g_signal_handlers_disconnect_by_func (layer,
layer_auto_transition_changed_cb, timeline);
g_signal_handlers_disconnect_by_func (layer, layer_active_changed_cb,
timeline);
timeline->layers = g_list_remove (timeline->layers, layer);
ges_layer_set_timeline (layer, NULL);
/* FIXME: we should resync the layer priorities */
g_signal_emit (timeline, ges_timeline_signals[LAYER_REMOVED], 0, layer);
gst_object_unref (layer);
return TRUE;
}
/**
* ges_timeline_add_track:
* @timeline: The #GESTimeline
* @track: (transfer full): The track to add
*
* Add a track to the timeline. Existing #GESClip-s in the timeline will,
* where appropriate, add their controlled elements to the new track.
*
* Returns: %TRUE if @track was properly added.
*/
/* FIXME: create track elements for clips which have already been
* added to existing layers.
*/
gboolean
ges_timeline_add_track (GESTimeline * timeline, GESTrack * track)
{
TrackPrivate *tr_priv;
GList *tmp;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
CHECK_THREAD (timeline);
GST_DEBUG ("timeline:%p, track:%p", timeline, track);
/* make sure we don't already control it */
LOCK_DYN (timeline);
if (G_UNLIKELY (g_list_find (timeline->tracks, (gconstpointer) track))) {
UNLOCK_DYN (timeline);
GST_WARNING ("Track is already controlled by this timeline");
return FALSE;
}
/* Add the track to ourself (as a GstBin)
* Reference is stolen ! */
if (G_UNLIKELY (!gst_bin_add (GST_BIN (timeline), GST_ELEMENT (track)))) {
UNLOCK_DYN (timeline);
GST_WARNING ("Couldn't add track to ourself (GST)");
return FALSE;
}
tr_priv = g_new0 (TrackPrivate, 1);
tr_priv->timeline = timeline;
tr_priv->track = track;
update_stream_object (tr_priv);
gst_stream_collection_add_stream (timeline->priv->stream_collection,
gst_object_ref (tr_priv->stream));
/* Add the track to the list of tracks we track */
timeline->priv->priv_tracks = g_list_append (timeline->priv->priv_tracks,
tr_priv);
timeline->tracks = g_list_append (timeline->tracks, track);
/* Inform the track that it's currently being used by ourself */
ges_track_set_timeline (track, timeline);
GST_DEBUG ("Done adding track, emitting 'track-added' signal");
_ghost_track_srcpad (tr_priv);
UNLOCK_DYN (timeline);
/* emit 'track-added' */
g_signal_emit (timeline, ges_timeline_signals[TRACK_ADDED], 0, track);
/* ensure that each existing clip has the opportunity to create a
* track element for this track*/
/* We connect to the object for the timeline editing mode management */
g_signal_connect (G_OBJECT (track), "track-element-added",
G_CALLBACK (track_element_added_cb), timeline);
g_signal_connect (G_OBJECT (track), "track-element-removed",
G_CALLBACK (track_element_removed_cb), timeline);
for (tmp = timeline->layers; tmp; tmp = tmp->next) {
GList *objects, *obj;
objects = ges_layer_get_clips (tmp->data);
for (obj = objects; obj; obj = obj->next) {
GESClip *clip = obj->data;
add_object_to_tracks (timeline, clip, track);
gst_object_unref (clip);
}
g_list_free (objects);
}
/* FIXME Check if we should rollback if we can't sync state */
gst_element_sync_state_with_parent (GST_ELEMENT (track));
g_object_set (track, "message-forward", TRUE, NULL);
return TRUE;
}
/**
* ges_timeline_remove_track:
* @timeline: The #GESTimeline
* @track: The track to remove
*
* Remove a track from the timeline.
*
* Returns: %TRUE if @track was properly removed.
*/
/* FIXME: release any track elements associated with this layer. currenly this
* will not happen if you remove the track before removing *all*
* clips which have a track element in this track.
*/
gboolean
ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track)
{
GList *tmp;
TrackPrivate *tr_priv;
GESTimelinePrivate *priv;
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
GST_DEBUG ("timeline:%p, track:%p", timeline, track);
priv = timeline->priv;
LOCK_DYN (timeline);
if (G_UNLIKELY (!(tmp = g_list_find_custom (priv->priv_tracks,
track, (GCompareFunc) custom_find_track)))) {
GST_WARNING ("Track doesn't belong to this timeline");
UNLOCK_DYN (timeline);
return FALSE;
}
tr_priv = tmp->data;
gst_object_unref (tr_priv->pad);
priv->priv_tracks = g_list_remove (priv->priv_tracks, tr_priv);
UNLOCK_DYN (timeline);
timeline->tracks = g_list_remove (timeline->tracks, track);
ges_track_set_timeline (track, NULL);
/* Remove ghost pad */
if (tr_priv->ghostpad) {
GST_DEBUG ("Removing ghostpad");
gst_pad_set_active (tr_priv->ghostpad, FALSE);
gst_ghost_pad_set_target ((GstGhostPad *) tr_priv->ghostpad, NULL);
gst_element_remove_pad (GST_ELEMENT (timeline), tr_priv->ghostpad);
}
/* Remove pad-added/-removed handlers */
g_signal_handlers_disconnect_by_func (track, track_element_added_cb,
timeline);
g_signal_handlers_disconnect_by_func (track, track_element_removed_cb,
timeline);
/* Signal track removal to all layers/objects */
g_signal_emit (timeline, ges_timeline_signals[TRACK_REMOVED], 0, track);
/* remove track from our bin */
gst_object_ref (track);
if (G_UNLIKELY (!gst_bin_remove (GST_BIN (timeline), GST_ELEMENT (track)))) {
GST_WARNING ("Couldn't remove track to ourself (GST)");
gst_object_unref (track);
return FALSE;
}
/* set track state to NULL */
gst_element_set_state (GST_ELEMENT (track), GST_STATE_NULL);
gst_object_unref (track);
g_free (tr_priv);
return TRUE;
}
/**
* ges_timeline_get_track_for_pad:
* @timeline: The #GESTimeline
* @pad: A pad
*
* Search for the #GESTrack corresponding to the given timeline's pad.
*
* Returns: (transfer none) (nullable): The track corresponding to @pad,
* or %NULL if there is an error.
*/
GESTrack *
ges_timeline_get_track_for_pad (GESTimeline * timeline, GstPad * pad)
{
GList *tmp;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
LOCK_DYN (timeline);
for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
if (pad == tr_priv->ghostpad) {
UNLOCK_DYN (timeline);
return tr_priv->track;
}
}
UNLOCK_DYN (timeline);
return NULL;
}
/**
* ges_timeline_get_pad_for_track:
* @timeline: The #GESTimeline
* @track: A track
*
* Search for the #GstPad corresponding to the given timeline's track.
* You can link to this pad to receive the output data of the given track.
*
* Returns: (transfer none) (nullable): The pad corresponding to @track,
* or %NULL if there is an error.
*/
GstPad *
ges_timeline_get_pad_for_track (GESTimeline * timeline, GESTrack * track)
{
GList *tmp;
LOCK_DYN (timeline);
for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
if (track == tr_priv->track) {
if (tr_priv->ghostpad)
gst_object_ref (tr_priv->ghostpad);
UNLOCK_DYN (timeline);
return tr_priv->ghostpad;
}
}
UNLOCK_DYN (timeline);
return NULL;
}
/**
* ges_timeline_get_tracks:
* @timeline: The #GESTimeline
*
* Get the list of #GESTrack-s used by the timeline.
*
* Returns: (transfer full) (element-type GESTrack): The list of tracks
* used by @timeline.
*/
GList *
ges_timeline_get_tracks (GESTimeline * timeline)
{
GList *res = NULL;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
LOCK_DYN (timeline);
res = g_list_copy_deep (timeline->tracks, (GCopyFunc) gst_object_ref, NULL);
UNLOCK_DYN (timeline);
return res;
}
/**
* ges_timeline_get_layers:
* @timeline: The #GESTimeline
*
* Get the list of #GESLayer-s present in the timeline.
*
* Returns: (transfer full) (element-type GESLayer): The list of
* layers present in @timeline sorted by priority.
*/
GList *
ges_timeline_get_layers (GESTimeline * timeline)
{
GList *tmp, *res = NULL;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
for (tmp = timeline->layers; tmp; tmp = g_list_next (tmp)) {
res = g_list_insert_sorted (res, gst_object_ref (tmp->data),
(GCompareFunc) sort_layers);
}
return res;
}
static void
track_commited_cb (GESTrack * track, GESTimeline * timeline)
{
gboolean emit_commited = FALSE;
GST_OBJECT_LOCK (timeline);
timeline->priv->expected_commited -= 1;
if (timeline->priv->expected_commited == 0)
emit_commited = TRUE;
g_signal_handlers_disconnect_by_func (track, track_commited_cb, timeline);
GST_OBJECT_UNLOCK (timeline);
if (emit_commited) {
g_signal_emit (timeline, ges_timeline_signals[COMMITED], 0);
}
}
/* Must be called with the timeline's DYN_LOCK */
static gboolean
ges_timeline_commit_unlocked (GESTimeline * timeline)
{
GList *tmp;
gboolean res = TRUE;
GST_DEBUG_OBJECT (timeline, "commiting changes");
timeline_tree_create_transitions (timeline->priv->tree,
ges_timeline_find_auto_transition);
for (tmp = timeline->layers; tmp; tmp = tmp->next) {
GESLayer *layer = tmp->data;
/* Ensure clip priorities are correct after an edit */
ges_layer_resync_priorities (layer);
}
timeline->priv->expected_commited =
g_list_length (timeline->priv->priv_tracks);
if (timeline->priv->expected_commited == 0) {
g_signal_emit (timeline, ges_timeline_signals[COMMITED], 0);
} else {
GstStreamCollection *collection = gst_stream_collection_new (NULL);
LOCK_DYN (timeline);
for (tmp = timeline->tracks; tmp; tmp = tmp->next) {
TrackPrivate *tr_priv =
g_list_find_custom (timeline->priv->priv_tracks, tmp->data,
(GCompareFunc) custom_find_track)->data;
update_stream_object (tr_priv);
gst_stream_collection_add_stream (collection,
gst_object_ref (tr_priv->stream));
g_signal_connect (tmp->data, "commited", G_CALLBACK (track_commited_cb),
timeline);
if (!ges_track_commit (GES_TRACK (tmp->data)))
res = FALSE;
}
gst_object_unref (timeline->priv->stream_collection);
timeline->priv->stream_collection = collection;
UNLOCK_DYN (timeline);
}
return res;
}
/**
* ges_timeline_commit:
* @timeline: A #GESTimeline
*
* Commit all the pending changes of the clips contained in the
* timeline.
*
* When changes happen in a timeline, they are not immediately executed
* internally, in a way that effects the output data of the timeline. You
* should call this method when you are done with a set of changes and you
* want them to be executed.
*
* Any pending changes will be executed in the backend. The
* #GESTimeline::commited signal will be emitted once this has completed.
* You should not try to change the state of the timeline, seek it or add
* tracks to it before receiving this signal. You can use
* ges_timeline_commit_sync() if you do not want to perform other tasks in
* the mean time.
*
* Note that all the pending changes will automatically be executed when
* the timeline goes from #GST_STATE_READY to #GST_STATE_PAUSED, which is
* usually triggered by a corresponding state changes in a containing
* #GESPipeline.
*
* Returns: %TRUE if pending changes were committed, or %FALSE if nothing
* needed to be committed.
*/
gboolean
ges_timeline_commit (GESTimeline * timeline)
{
gboolean ret;
GstStreamCollection *pcollection = timeline->priv->stream_collection;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
LOCK_DYN (timeline);
ret = ges_timeline_commit_unlocked (timeline);
UNLOCK_DYN (timeline);
if (pcollection != timeline->priv->stream_collection) {
gst_element_post_message ((GstElement *) timeline,
gst_message_new_stream_collection ((GstObject *) timeline,
timeline->priv->stream_collection));
}
ges_timeline_emit_snapping (timeline, NULL, NULL, GST_CLOCK_TIME_NONE);
return ret;
}
static void
commited_cb (GESTimeline * timeline)
{
g_mutex_lock (&timeline->priv->commited_lock);
g_cond_signal (&timeline->priv->commited_cond);
g_mutex_unlock (&timeline->priv->commited_lock);
}
/**
* ges_timeline_commit_sync:
* @timeline: A #GESTimeline
*
* Commit all the pending changes of the clips contained in the
* timeline and wait for the changes to complete.
*
* See ges_timeline_commit().
*
* Returns: %TRUE if pending changes were committed, or %FALSE if nothing
* needed to be committed.
*/
gboolean
ges_timeline_commit_sync (GESTimeline * timeline)
{
gboolean ret;
gboolean wait_for_signal;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
/* Let's make sure our state is stable */
gst_element_get_state (GST_ELEMENT (timeline), NULL, NULL,
GST_CLOCK_TIME_NONE);
/* Let's make sure no track gets added between now and the actual commiting */
LOCK_DYN (timeline);
wait_for_signal = g_list_length (timeline->priv->priv_tracks) > 0
&& GST_STATE (timeline) >= GST_STATE_PAUSED;
if (!wait_for_signal) {
ret = ges_timeline_commit_unlocked (timeline);
} else {
gulong handler_id =
g_signal_connect (timeline, "commited", (GCallback) commited_cb, NULL);
g_mutex_lock (&timeline->priv->commited_lock);
ret = ges_timeline_commit_unlocked (timeline);
g_cond_wait (&timeline->priv->commited_cond,
&timeline->priv->commited_lock);
g_mutex_unlock (&timeline->priv->commited_lock);
g_signal_handler_disconnect (timeline, handler_id);
}
UNLOCK_DYN (timeline);
return ret;
}
/**
* ges_timeline_get_duration:
* @timeline: The #GESTimeline
*
* Get the current #GESTimeline:duration of the timeline
*
* Returns: The current duration of @timeline.
*/
GstClockTime
ges_timeline_get_duration (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE);
CHECK_THREAD (timeline);
return timeline->priv->duration;
}
/**
* ges_timeline_get_auto_transition:
* @timeline: The #GESTimeline
*
* Gets #GESTimeline:auto-transition for the timeline.
*
* Returns: The auto-transition of @self.
*/
gboolean
ges_timeline_get_auto_transition (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
CHECK_THREAD (timeline);
return timeline->priv->auto_transition;
}
/**
* ges_timeline_set_auto_transition:
* @timeline: The #GESTimeline
* @auto_transition: Whether transitions should be automatically added
* to @timeline's layers
*
* Sets #GESTimeline:auto-transition for the timeline. This will also set
* the corresponding #GESLayer:auto-transition for all of the timeline's
* layers to the same value. See ges_layer_set_auto_transition() if you
* wish to set the layer's #GESLayer:auto-transition individually.
*/
void
ges_timeline_set_auto_transition (GESTimeline * timeline,
gboolean auto_transition)
{
GList *layers;
GESLayer *layer;
g_return_if_fail (GES_IS_TIMELINE (timeline));
CHECK_THREAD (timeline);
timeline->priv->auto_transition = auto_transition;
g_object_notify (G_OBJECT (timeline), "auto-transition");
layers = timeline->layers;
for (; layers; layers = layers->next) {
layer = layers->data;
ges_layer_set_auto_transition (layer, auto_transition);
}
}
/**
* ges_timeline_get_snapping_distance:
* @timeline: The #GESTimeline
*
* Gets the #GESTimeline:snapping-distance for the timeline.
*
* Returns: The snapping distance (in nanoseconds) of @timeline.
*/
GstClockTime
ges_timeline_get_snapping_distance (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE);
CHECK_THREAD (timeline);
return timeline->priv->snapping_distance;
}
/**
* ges_timeline_set_snapping_distance:
* @timeline: The #GESTimeline
* @snapping_distance: The snapping distance to use (in nanoseconds)
*
* Sets #GESTimeline:snapping-distance for the timeline. This new value
* will only effect future snappings and will not be used to snap the
* current element positions within the timeline.
*/
void
ges_timeline_set_snapping_distance (GESTimeline * timeline,
GstClockTime snapping_distance)
{
g_return_if_fail (GES_IS_TIMELINE (timeline));
CHECK_THREAD (timeline);
timeline->priv->snapping_distance = snapping_distance;
}
/**
* ges_timeline_get_element:
* @timeline: The #GESTimeline
* @name: The name of the element to find
*
* Gets the element contained in the timeline with the given name.
*
* Returns: (transfer full) (nullable): The timeline element in @timeline
* with the given @name, or %NULL if it was not found.
*/
GESTimelineElement *
ges_timeline_get_element (GESTimeline * timeline, const gchar * name)
{
GESTimelineElement *ret;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
/* FIXME: handle NULL name */
ret = g_hash_table_lookup (timeline->priv->all_elements, name);
if (ret)
return gst_object_ref (ret);
#ifndef GST_DISABLE_GST_DEBUG
{
GList *element_names, *tmp;
element_names = g_hash_table_get_keys (timeline->priv->all_elements);
GST_INFO_OBJECT (timeline, "Does not contain element %s", name);
for (tmp = element_names; tmp; tmp = tmp->next) {
GST_DEBUG_OBJECT (timeline, "Containes: %s", (gchar *) tmp->data);
}
g_list_free (element_names);
}
#endif
return NULL;
}
/**
* ges_timeline_is_empty:
* @timeline: The #GESTimeline
*
* Check whether the timeline is empty or not.
*
* Returns: %TRUE if @timeline is empty.
*/
gboolean
ges_timeline_is_empty (GESTimeline * timeline)
{
GHashTableIter iter;
gpointer key, value;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
CHECK_THREAD (timeline);
if (g_hash_table_size (timeline->priv->all_elements) == 0)
return TRUE;
g_hash_table_iter_init (&iter, timeline->priv->all_elements);
while (g_hash_table_iter_next (&iter, &key, &value)) {
if (GES_IS_SOURCE (value) &&
ges_track_element_is_active (GES_TRACK_ELEMENT (value)))
return FALSE;
}
return TRUE;
}
/**
* ges_timeline_get_layer:
* @timeline: The #GESTimeline to retrieve a layer from
* @priority: The priority/index of the layer to find
*
* Retrieve the layer whose index in the timeline matches the given
* priority.
*
* Returns: (transfer full) (nullable): The layer with the given
* @priority, or %NULL if none was found.
*
* Since 1.6
*/
GESLayer *
ges_timeline_get_layer (GESTimeline * timeline, guint priority)
{
GList *tmp;
GESLayer *layer = NULL;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
for (tmp = timeline->layers; tmp; tmp = tmp->next) {
GESLayer *tmp_layer = GES_LAYER (tmp->data);
guint tmp_priority;
g_object_get (tmp_layer, "priority", &tmp_priority, NULL);
if (tmp_priority == priority) {
layer = gst_object_ref (tmp_layer);
break;
}
}
return layer;
}
/**
* ges_timeline_paste_element:
* @timeline: The #GESTimeline onto which @element should be pasted
* @element: The element to paste
* @position: The position in the timeline @element should be pasted to,
* i.e. the #GESTimelineElement:start value for the pasted element.
* @layer_priority: The layer into which the element should be pasted.
* -1 means paste to the same layer from which @element has been copied from
*
* Paste an element inside the timeline. @element **must** be the return of
* ges_timeline_element_copy() with `deep=TRUE`,
* and it should not be changed before pasting. @element itself is not
* placed in the timeline, instead a new element is created, alike to the
* originally copied element. Note that the originally copied element must
* also lie within @timeline, at both the point of copying and pasting.
*
* Pasting may fail if it would place the timeline in an unsupported
* configuration.
*
* After calling this function @element should not be used. In particular,
* @element can **not** be pasted again. Instead, you can copy the
* returned element and paste that copy (although, this is only possible
* if the paste was successful).
*
* See also ges_timeline_element_paste().
*
* Returns: (transfer full) (nullable): The newly created element, or
* %NULL if pasting fails.
*/
GESTimelineElement *
ges_timeline_paste_element (GESTimeline * timeline,
GESTimelineElement * element, GstClockTime position, gint layer_priority)
{
GESTimelineElement *res, *copied_from;
GESTimelineElementClass *element_class;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (element), FALSE);
CHECK_THREAD (timeline);
element_class = GES_TIMELINE_ELEMENT_GET_CLASS (element);
/* steal ownership of the copied element */
copied_from = ges_timeline_element_get_copied_from (element);
if (!copied_from) {
GST_ERROR_OBJECT (element, "Is not being 'deeply' copied!");
return NULL;
}
if (!element_class->paste) {
GST_ERROR_OBJECT (element, "No paste vmethod implemented");
gst_object_unref (copied_from);
return NULL;
}
/*
* Currently the API only supports pasting onto the same layer from which
* the @element has been copied from, i.e., @layer_priority needs to be -1.
*/
if (layer_priority != -1) {
GST_WARNING_OBJECT (timeline,
"Only -1 value for layer priority is supported");
gst_object_unref (copied_from);
return NULL;
}
res = element_class->paste (element, copied_from, position);
gst_object_unref (copied_from);
return res ? g_object_ref (res) : res;
}
/**
* ges_timeline_move_layer:
* @timeline: A #GESTimeline
* @layer: A layer within @timeline, whose priority should be changed
* @new_layer_priority: The new index for @layer
*
* Moves a layer within the timeline to the index given by
* @new_layer_priority.
* An index of 0 corresponds to the layer with the highest priority in a
* timeline. If @new_layer_priority is greater than the number of layers
* present in the timeline, it will become the lowest priority layer.
*
* Since: 1.16
*/
gboolean
ges_timeline_move_layer (GESTimeline * timeline, GESLayer * layer,
guint new_layer_priority)
{
gint current_priority;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
g_return_val_if_fail (ges_layer_get_timeline (layer) == timeline, FALSE);
CHECK_THREAD (timeline);
current_priority = ges_layer_get_priority (layer);
if (new_layer_priority == current_priority) {
GST_DEBUG_OBJECT (timeline,
"Nothing to do for %" GST_PTR_FORMAT ", same priorities", layer);
return TRUE;
}
timeline->layers = g_list_remove (timeline->layers, layer);
timeline->layers = g_list_insert (timeline->layers, layer,
(gint) new_layer_priority);
_resync_layers (timeline);
return TRUE;
}
/**
* ges_timeline_get_frame_time:
* @self: The self on which to retrieve the timestamp for @frame_number
* @frame_number: The frame number to get the corresponding timestamp of in the
* timeline coordinates
*
* This method allows you to convert a timeline output frame number into a
* timeline #GstClockTime. For example, this time could be used to seek to a
* particular frame in the timeline's output, or as the edit position for
* an element within the timeline.
*
* Returns: The timestamp corresponding to @frame_number in the output of @self.
*/
GstClockTime
ges_timeline_get_frame_time (GESTimeline * self, GESFrameNumber frame_number)
{
gint fps_n, fps_d;
g_return_val_if_fail (GES_IS_TIMELINE (self), GST_CLOCK_TIME_NONE);
g_return_val_if_fail (GES_FRAME_NUMBER_IS_VALID (frame_number),
GST_CLOCK_TIME_NONE);
timeline_get_framerate (self, &fps_n, &fps_d);
return gst_util_uint64_scale_int_ceil (frame_number,
fps_d * GST_SECOND, fps_n);
}
/**
* ges_timeline_get_frame_at:
* @self: A #GESTimeline
* @timestamp: The timestamp to get the corresponding frame number of
*
* This method allows you to convert a timeline #GstClockTime into its
* corresponding #GESFrameNumber in the timeline's output.
*
* Returns: The frame number @timestamp corresponds to.
*/
GESFrameNumber
ges_timeline_get_frame_at (GESTimeline * self, GstClockTime timestamp)
{
gint fps_n, fps_d;
g_return_val_if_fail (GES_IS_TIMELINE (self), GES_FRAME_NUMBER_NONE);
g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp),
GES_FRAME_NUMBER_NONE);
timeline_get_framerate (self, &fps_n, &fps_d);
return gst_util_uint64_scale (timestamp, fps_n, fps_d * GST_SECOND);
}
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