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gstreamer/ges/ges-timeline.c
Thibault Saunier 136456e180 Deprecate ges_layer_set_priority 
Keep old behaviour but deprecate the method and property as
ges_timeline_move_layer should be used instead.
2018-03-31 13:44:14 -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>
*
* 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.
*
* Contains a list of #GESLayer which users should use to arrange the
* various clips through time.
*
* The output type is determined by the #GESTrack that are set on
* the #GESTimeline.
*
* To save/load a timeline, you can use the ges_timeline_load_from_uri() and
* ges_timeline_save_to_uri() methods to use the default format. If you wish
*
* Note that any change you make in the timeline will not actually be taken
* into account until you call the #ges_timeline_commit method.
*/
#include "ges-internal.h"
#include "ges-project.h"
#include "ges-container.h"
#include "ges-timeline.h"
#include "ges-track.h"
#include "ges-layer.h"
#include "ges-auto-transition.h"
#include "ges.h"
typedef struct _MoveContext MoveContext;
static GPtrArray *select_tracks_for_object_default (GESTimeline * timeline,
GESClip * clip, GESTrackElement * tr_obj, gpointer user_data);
static inline void init_movecontext (MoveContext * mv_ctx, gboolean first_init);
static void ges_extractable_interface_init (GESExtractableInterface * iface);
static void ges_meta_container_interface_init
(GESMetaContainerInterface * iface);
G_DEFINE_TYPE_WITH_CODE (GESTimeline, ges_timeline, GST_TYPE_BIN,
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init)
G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER,
ges_meta_container_interface_init));
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
typedef struct TrackObjIters
{
GSequenceIter *iter_start;
GSequenceIter *iter_end;
GSequenceIter *iter_obj;
GSequenceIter *iter_by_layer;
GESLayer *layer;
GESTrackElement *trackelement;
} TrackObjIters;
static void
_destroy_obj_iters (TrackObjIters * iters)
{
g_slice_free (TrackObjIters, iters);
}
/* The move context is used for the timeline editing modes functions in order to
* + Ripple / Roll / Slide / Move / Trim
*
* The context aims at avoiding to recalculate values/objects on each call of the
* editing functions.
*/
struct _MoveContext
{
GESClip *clip;
GESEdge edge;
GESEditMode mode;
/* The start of the moving context */
GstClockTime start;
/* Ripple and Roll Objects */
GList *moving_trackelements;
/* We use it as a set of Clip to move between layers */
GHashTable *toplevel_containers;
/* Min priority of the objects currently in toplevel_containers */
guint min_move_layer;
/* Max priority of the objects currently in toplevel_containers */
guint max_layer_prio;
/* Never trim so duration would become < 0 */
guint64 max_trim_pos;
/* Never trim so inpoint + duration would change */
guint64 min_trim_pos;
/* fields to force/avoid new context */
/* Set to %TRUE when the track is doing updates of track element
* properties so we don't end up always needing new move context */
gboolean ignore_needs_ctx;
gboolean needs_move_ctx;
/* Last snapping properties */
GESTrackElement *last_snaped1;
GESTrackElement *last_snaped2;
GstClockTime *last_snap_ts;
/* Priority of the layer where we are moving current clip
* -1 if not moving any clip to a new layer. */
GESLayer *moving_to_layer;
};
struct _GESTimelinePrivate
{
/* The duration of the timeline */
gint64 duration;
/* The auto-transition of the timeline */
gboolean auto_transition;
/* Use to determine that a edit action should be rolled
* back because it leads to a wrong state of the element
* position (currently only happens if 3 clips overlap) */
gboolean needs_rollback;
gboolean rolling_back;
/* Timeline edition modes and snapping management */
guint64 snapping_distance;
/* FIXME: Should we offer an API over those fields ?
* FIXME: Should other classes than subclasses of Source also
* be tracked? */
/* Snapping fields */
GHashTable *by_start; /* {Source: start} */
GHashTable *by_end; /* {Source: end} */
GHashTable *by_object; /* {timecode: Source} */
GHashTable *obj_iters; /* {Source: TrackObjIters} */
GSequence *starts_ends; /* Sorted list of starts/ends */
/* We keep 1 reference to our trackelement here */
GSequence *tracksources; /* Source-s sorted by start/priorities */
GRecMutex dyn_mutex;
GList *priv_tracks;
/* FIXME: We should definitly offer an API over this,
* probably through a ges_layer_get_track_elements () method */
GHashTable *by_layer; /* {layer: GSequence of TrackElement by start/priorities} */
/* Avoid sorting layers when we are actually resyncing them ourself */
gboolean resyncing_layers;
GList *auto_transitions;
MoveContext movecontext;
/* 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 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;
};
/* 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;
} 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
};
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.
*/
while (tl->tracks)
ges_timeline_remove_track (GES_TIMELINE (object), tl->tracks->data);
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_hash_table_unref (priv->by_start);
g_hash_table_unref (priv->by_end);
g_hash_table_unref (priv->by_object);
g_hash_table_unref (priv->by_layer);
g_hash_table_unref (priv->obj_iters);
g_sequence_free (priv->starts_ends);
g_sequence_free (priv->tracksources);
g_list_free (priv->movecontext.moving_trackelements);
g_hash_table_unref (priv->movecontext.toplevel_containers);
g_list_free_full (priv->auto_transitions, gst_object_unref);
g_hash_table_unref (priv->all_elements);
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_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_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));
timeline->priv->expected_async_done = g_list_length (timeline->tracks);
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);
}
forward:
gst_element_post_message (GST_ELEMENT_CAST (bin), message);
}
/* 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);
GstBinClass *bin_class = GST_BIN_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESTimelinePrivate));
GST_DEBUG_CATEGORY_INIT (ges_timeline_debug, "gestimeline",
GST_DEBUG_FG_YELLOW, "ges timeline");
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;
bin_class->handle_message = GST_DEBUG_FUNCPTR (ges_timeline_handle_message);
/**
* GESTimeline:duration:
*
* Current duration (in nanoseconds) of the #GESTimeline
*/
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:
*
* Sets whether transitions are added automagically when clips overlap.
*/
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:
*
* Distance (in nanoseconds) from which a moving object will snap
* with it neighboors. 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 neighboors", 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 #GESTrack that was added to the timeline
*
* Will be emitted after the track was added to 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, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_TRACK);
/**
* GESTimeline::track-removed:
* @timeline: the #GESTimeline
* @track: the #GESTrack that was removed from the timeline
*
* Will be emitted after the track was 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, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_TRACK);
/**
* GESTimeline::layer-added:
* @timeline: the #GESTimeline
* @layer: the #GESLayer that was added to the timeline
*
* Will be emitted after a new layer is added to 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, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_LAYER);
/**
* GESTimeline::layer-removed:
* @timeline: the #GESTimeline
* @layer: the #GESLayer that was removed from the timeline
*
* Will be emitted after the layer was 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, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_LAYER);
/**
* GESTimeline::group-added
* @timeline: the #GESTimeline
* @group: the #GESGroup
*
* Will be emitted after a new group is added to to 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, g_cclosure_marshal_generic, G_TYPE_NONE, 1, GES_TYPE_GROUP);
/**
* GESTimeline::group-removed
* @timeline: the #GESTimeline
* @group: the #GESGroup
* @children: (element-type GES.Container) (transfer container): a list of #GESContainer
*
* Will be emitted after a group has been removed from the timeline.
*/
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, g_cclosure_marshal_generic, G_TYPE_NONE, 2, GES_TYPE_GROUP,
G_TYPE_PTR_ARRAY);
/**
* GESTimeline::track-elements-snapping:
* @timeline: the #GESTimeline
* @obj1: the first #GESTrackElement that was snapping.
* @obj2: the second #GESTrackElement that was snapping.
* @position: the position where the two objects finally snapping.
*
* Will be emitted when the 2 #GESTrackElement first snapped
*/
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-end:
* @timeline: the #GESTimeline
* @obj1: the first #GESTrackElement that was snapping.
* @obj2: the second #GESTrackElement that was snapping.
* @position: the position where the two objects finally snapping.
*
* Will be emitted when the 2 #GESTrackElement ended to snap
*/
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 #GESClip on which @track_element will land
* @track_element: The #GESTrackElement for which to choose the tracks it should land into
*
* Returns: (transfer full) (element-type GESTrack): a #GPtrArray of #GESTrack-s where that object should be added
*/
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
* don't need to do anything in the meantime.
*/
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 = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_TIMELINE, GESTimelinePrivate);
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;
/* Move context initialization */
init_movecontext (&self->priv->movecontext, TRUE);
priv->movecontext.ignore_needs_ctx = FALSE;
priv->priv_tracks = NULL;
priv->by_start = g_hash_table_new (g_direct_hash, g_direct_equal);
priv->by_end = g_hash_table_new (g_direct_hash, g_direct_equal);
priv->by_object = g_hash_table_new (g_direct_hash, g_direct_equal);
priv->by_layer = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL,
(GDestroyNotify) g_sequence_free);
priv->obj_iters = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL,
(GDestroyNotify) _destroy_obj_iters);
priv->starts_ends = g_sequence_new (g_free);
priv->tracksources = g_sequence_new (gst_object_unref);
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->group_id = -1;
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);
}
/* Private methods */
static inline GESContainer *
get_toplevel_container (gpointer element)
{
GESTimelineElement *ret =
ges_timeline_element_get_toplevel_parent ((GESTimelineElement
*) (element));
/* We own a ref to the elements ourself */
gst_object_unref (ret);
return (GESContainer *) ret;
}
/* 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;
}
static void
timeline_update_duration (GESTimeline * timeline)
{
GstClockTime *cduration;
GSequenceIter *it = g_sequence_get_end_iter (timeline->priv->starts_ends);
it = g_sequence_iter_prev (it);
if (g_sequence_iter_is_end (it)) {
timeline->priv->duration = 0;
g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]);
return;
}
cduration = g_sequence_get (it);
if (cduration && timeline->priv->duration != *cduration) {
GST_DEBUG ("track duration : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (*cduration),
GST_TIME_ARGS (timeline->priv->duration));
timeline->priv->duration = *cduration;
g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]);
}
}
static gint
find_layer_by_prio (GESLayer * a, gpointer pprio)
{
gint prio = GPOINTER_TO_INT (pprio), lprio = ges_layer_get_priority (a);
if (lprio < prio)
return -1;
if (lprio > prio)
return 1;
return 0;
}
static void
sort_track_elements (GESTimeline * timeline, TrackObjIters * iters)
{
g_sequence_sort_changed (iters->iter_obj,
(GCompareDataFunc) element_start_compare, NULL);
}
static gint
compare_uint64 (guint64 * a, guint64 * b, gpointer user_data)
{
if (*a > *b)
return 1;
else if (*a == *b)
return 0;
else
return -1;
}
static gint
custom_find_track (TrackPrivate * tr_priv, GESTrack * track)
{
if (tr_priv->track == track)
return 0;
return -1;
}
static inline void
sort_starts_ends_end (GESTimeline * timeline, TrackObjIters * iters)
{
GESTimelineElement *obj = GES_TIMELINE_ELEMENT (iters->trackelement);
GESTimelinePrivate *priv = timeline->priv;
guint64 *end = g_hash_table_lookup (priv->by_end, obj);
*end = _START (obj) + _DURATION (obj);
g_sequence_sort_changed (iters->iter_end, (GCompareDataFunc) compare_uint64,
NULL);
timeline_update_duration (timeline);
}
static inline void
sort_starts_ends_start (GESTimeline * timeline, TrackObjIters * iters)
{
GESTimelineElement *obj = GES_TIMELINE_ELEMENT (iters->trackelement);
GESTimelinePrivate *priv = timeline->priv;
guint64 *start = g_hash_table_lookup (priv->by_start, obj);
*start = _START (obj);
g_sequence_sort_changed (iters->iter_start,
(GCompareDataFunc) compare_uint64, NULL);
timeline_update_duration (timeline);
}
static void
_destroy_auto_transition_cb (GESAutoTransition * auto_transition,
GESTimeline * timeline)
{
GESTimelinePrivate *priv = timeline->priv;
MoveContext *mv_ctx = &timeline->priv->movecontext;
GESClip *transition = auto_transition->transition_clip;
GESLayer *layer = ges_clip_get_layer (transition);
GESContainer *toplevel_prev =
get_toplevel_container (auto_transition->previous_clip), *toplevel_next =
get_toplevel_container (auto_transition->next_clip);
if (g_hash_table_lookup (mv_ctx->toplevel_containers, toplevel_prev) &&
g_hash_table_lookup (mv_ctx->toplevel_containers, toplevel_next)) {
GESLayer *nlayer = mv_ctx->moving_to_layer;
if (!nlayer)
return;
ges_clip_move_to_layer (transition, nlayer);
return;
}
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);
}
static GESAutoTransition *
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));
} 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;
}
typedef GESAutoTransition *(*GetAutoTransitionFunc) (GESTimeline * timeline,
GESLayer * layer, GESTrack * track, GESTrackElement * previous,
GESTrackElement * next, GstClockTime transition_duration);
static GESAutoTransition *
_find_transition_from_auto_transitions (GESTimeline * timeline,
GESLayer * layer, GESTrack * track, 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) {
timeline->priv->needs_rollback = TRUE;
GST_INFO_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,
GESLayer * layer, GESTrack * track, GESTrackElement * prev,
GESTrackElement * next, GstClockTime transition_duration)
{
GSequenceIter *tmp_iter;
GSequence *by_layer_sequence;
GESTimelinePrivate *priv = timeline->priv;
GESAutoTransition *auto_transition =
_find_transition_from_auto_transitions (timeline, layer, track, prev,
next, transition_duration);
if (auto_transition)
return auto_transition;
/* Try to find a transition that perfectly fits with the one that
* should be added at that place
* optimize: Use g_sequence_search instead of going over all the
* sequence */
by_layer_sequence = g_hash_table_lookup (priv->by_layer, layer);
for (tmp_iter = g_sequence_get_begin_iter (by_layer_sequence);
tmp_iter && !g_sequence_iter_is_end (tmp_iter);
tmp_iter = g_sequence_iter_next (tmp_iter)) {
GESTrackElement *maybe_transition = g_sequence_get (tmp_iter);
if (ges_track_element_get_track (maybe_transition) != track)
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 */
return create_transition (timeline, prev, next,
GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (maybe_transition)), layer,
_START (next), transition_duration);
}
return NULL;
}
/* Create all transition that do not exist on @layer.
* @get_auto_transition is called to check if a particular transition exists.
* If @track is specified, we will create the transitions only for that particular
* track. */
static void
_create_transitions_on_layer (GESTimeline * timeline, GESLayer * layer,
GESTrack * track, GESTrackElement * initiating_obj,
GetAutoTransitionFunc get_auto_transition)
{
guint32 layer_prio;
GSequenceIter *iter;
GESAutoTransition *transition;
GESContainer *toplevel_next;
MoveContext *mv_ctx = &timeline->priv->movecontext;
GESTrack *ctrack = track;
GList *entered = NULL; /* List of TrackElement for wich we walk through the
* "start" but not the "end" in the starts_ends list */
GESTimelinePrivate *priv = timeline->priv;
if (!layer || !ges_layer_get_auto_transition (layer))
return;
layer_prio = ges_layer_get_priority (layer);
for (iter = g_sequence_get_begin_iter (priv->starts_ends);
iter && !g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter)) {
GList *tmp;
guint *start_or_end = g_sequence_get (iter);
GESTrackElement *next = g_hash_table_lookup (timeline->priv->by_object,
start_or_end);
GESContainer *toplevel =
get_toplevel_container (GES_TIMELINE_ELEMENT (next));
/* Only object that are in that layer and track */
if (_ges_track_element_get_layer_priority (next) != layer_prio ||
(track && track != ges_track_element_get_track (next)))
continue;
if (track == NULL)
ctrack = ges_track_element_get_track (next);
if (start_or_end == g_hash_table_lookup (priv->by_end, next)) {
if (initiating_obj == next) {
/* We passed the objects that initiated the research
* we are now done */
g_list_free (entered);
return;
}
entered = g_list_remove (entered, next);
continue;
}
toplevel_next = get_toplevel_container (next);
for (tmp = entered; tmp; tmp = tmp->next) {
gint64 transition_duration;
GESTrackElement *prev = tmp->data;
GESContainer *toplevel_prev = get_toplevel_container (prev);
/* If we are not in the same track, we do not create a transition */
if (ctrack != ges_track_element_get_track (prev))
continue;
/* If elements are in the same toplevel element, we do not create a transition */
if (get_toplevel_container (GES_TIMELINE_ELEMENT (prev)) == toplevel)
continue;
/* If the element is inside a container we are moving, we do not
* create a transition */
if (g_hash_table_lookup (mv_ctx->toplevel_containers, toplevel_prev) &&
g_hash_table_lookup (mv_ctx->toplevel_containers, toplevel_next))
continue;
transition_duration = (_START (prev) + _DURATION (prev)) - _START (next);
if (transition_duration > 0 && transition_duration < _DURATION (prev) &&
transition_duration < _DURATION (next)) {
transition =
get_auto_transition (timeline, layer, ctrack, prev, next,
transition_duration);
if (!transition)
create_transition (timeline, prev, next, NULL, layer,
_START (next), transition_duration);
}
}
/* And add that object to the entered list so that it we can possibly set
* a transition on its end edge */
entered = g_list_append (entered, next);
}
}
/* @track_element must be a GESSource */
void
timeline_create_transitions (GESTimeline * timeline,
GESTrackElement * track_element)
{
GESTrack *track;
GList *layer_node;
GESTimelinePrivate *priv = timeline->priv;
MoveContext *mv_ctx = &timeline->priv->movecontext;
if (!priv->needs_transitions_update)
return;
if (mv_ctx->moving_trackelements &&
GES_TIMELINE_ELEMENT_START (track_element) > mv_ctx->start) {
GST_DEBUG_OBJECT (timeline, "Not creating transition around %"
GES_TIMELINE_ELEMENT_FORMAT " as it is not the first rippled"
" element", GES_TIMELINE_ELEMENT_ARGS (track_element));
return;
}
track = ges_track_element_get_track (track_element);
layer_node = g_list_find_custom (timeline->layers,
GINT_TO_POINTER (_ges_track_element_get_layer_priority (track_element)),
(GCompareFunc) find_layer_by_prio);
_create_transitions_on_layer (timeline,
layer_node ? layer_node->data : NULL, track, track_element,
_find_transition_from_auto_transitions);
GST_DEBUG_OBJECT (timeline, "Done updating transitions");
}
/* Timeline edition functions */
static inline void
init_movecontext (MoveContext * mv_ctx, gboolean first_init)
{
if (G_UNLIKELY (first_init))
mv_ctx->toplevel_containers =
g_hash_table_new (g_direct_hash, g_direct_equal);
mv_ctx->moving_trackelements = NULL;
mv_ctx->start = G_MAXUINT64;
mv_ctx->max_trim_pos = G_MAXUINT64;
mv_ctx->min_move_layer = G_MAXUINT;
mv_ctx->max_layer_prio = 0;
mv_ctx->last_snaped1 = NULL;
mv_ctx->last_snaped2 = NULL;
mv_ctx->last_snap_ts = NULL;
mv_ctx->moving_to_layer = NULL;
}
static inline void
clean_movecontext (MoveContext * mv_ctx)
{
g_list_free (mv_ctx->moving_trackelements);
g_hash_table_remove_all (mv_ctx->toplevel_containers);
init_movecontext (mv_ctx, FALSE);
}
static void
stop_tracking_track_element (GESTimeline * timeline,
GESTrackElement * trackelement)
{
guint64 *start, *end;
TrackObjIters *iters;
GESTimelinePrivate *priv = timeline->priv;
iters = g_hash_table_lookup (priv->obj_iters, trackelement);
if (G_LIKELY (iters->iter_by_layer)) {
g_sequence_remove (iters->iter_by_layer);
} else {
GST_WARNING_OBJECT (timeline, "TrackElement %p was in no layer",
trackelement);
}
if (GES_IS_SOURCE (trackelement)) {
start = g_hash_table_lookup (priv->by_start, trackelement);
end = g_hash_table_lookup (priv->by_end, trackelement);
g_hash_table_remove (priv->by_start, trackelement);
g_hash_table_remove (priv->by_end, trackelement);
g_hash_table_remove (priv->by_object, end);
g_hash_table_remove (priv->by_object, start);
g_sequence_remove (iters->iter_start);
g_sequence_remove (iters->iter_end);
g_sequence_remove (iters->iter_obj);
timeline_update_duration (timeline);
}
g_hash_table_remove (priv->obj_iters, trackelement);
}
static void
start_tracking_track_element (GESTimeline * timeline,
GESTrackElement * trackelement)
{
guint64 *pstart, *pend;
GSequence *by_layer_sequence;
TrackObjIters *iters;
GESTimelinePrivate *priv = timeline->priv;
guint layer_prio = _ges_track_element_get_layer_priority (trackelement);
GList *layer_node = g_list_find_custom (timeline->layers,
GINT_TO_POINTER (layer_prio), (GCompareFunc) find_layer_by_prio);
GESLayer *layer = layer_node ? layer_node->data : NULL;
iters = g_slice_new0 (TrackObjIters);
/* We add all TrackElement to obj_iters as we always follow them
* in the by_layer Sequences */
g_hash_table_insert (priv->obj_iters, trackelement, iters);
/* Track all objects by layer */
if (G_UNLIKELY (layer == NULL)) {
/* We handle the case where we have TrackElement that are in no layer by not
* tracking them
*
* FIXME: Check if we should rather try to track them in some sort of
* dummy layer, or even refuse TrackElements to be added in Tracks if
* they land in no layer the timeline controls.
*/
GST_ERROR_OBJECT (timeline, "Adding a TrackElement that lands in no layer "
"we are controlling");
} else {
by_layer_sequence = g_hash_table_lookup (priv->by_layer, layer);
iters->iter_by_layer =
g_sequence_insert_sorted (by_layer_sequence, trackelement,
(GCompareDataFunc) element_start_compare, NULL);
iters->layer = layer;
}
if (GES_IS_SOURCE (trackelement)) {
/* Track only sources for timeline edition and snapping */
pstart = g_malloc (sizeof (guint64));
pend = g_malloc (sizeof (guint64));
*pstart = _START (trackelement);
*pend = *pstart + _DURATION (trackelement);
iters->iter_start = g_sequence_insert_sorted (priv->starts_ends, pstart,
(GCompareDataFunc) compare_uint64, NULL);
iters->iter_end = g_sequence_insert_sorted (priv->starts_ends, pend,
(GCompareDataFunc) compare_uint64, NULL);
iters->iter_obj =
g_sequence_insert_sorted (priv->tracksources,
gst_object_ref (trackelement), (GCompareDataFunc) element_start_compare,
NULL);
iters->trackelement = trackelement;
g_hash_table_insert (priv->by_start, trackelement, pstart);
g_hash_table_insert (priv->by_object, pstart, trackelement);
g_hash_table_insert (priv->by_end, trackelement, pend);
g_hash_table_insert (priv->by_object, pend, trackelement);
timeline->priv->movecontext.needs_move_ctx = TRUE;
timeline_update_duration (timeline);
timeline_create_transitions (timeline, trackelement);
}
}
static inline void
ges_timeline_emit_snappig (GESTimeline * timeline, GESTrackElement * obj1,
guint64 * timecode)
{
GESTrackElement *obj2;
MoveContext *mv_ctx = &timeline->priv->movecontext;
GstClockTime snap_time = timecode ? *timecode : 0;
GstClockTime last_snap_ts = mv_ctx->last_snap_ts ?
*mv_ctx->last_snap_ts : GST_CLOCK_TIME_NONE;
GST_DEBUG_OBJECT (timeline, "Distance: %" GST_TIME_FORMAT " snapping at %"
GST_TIME_FORMAT, GST_TIME_ARGS (timeline->priv->snapping_distance),
GST_TIME_ARGS (snap_time));
if (timecode == NULL) {
if (mv_ctx->last_snaped1 != NULL && mv_ctx->last_snaped2 != NULL) {
g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0,
mv_ctx->last_snaped1, mv_ctx->last_snaped2, last_snap_ts);
/* We then need to recalculate the moving context */
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
return;
}
obj2 = g_hash_table_lookup (timeline->priv->by_object, timecode);
if (last_snap_ts != *timecode) {
g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0,
mv_ctx->last_snaped1, mv_ctx->last_snaped2, (last_snap_ts));
/* We want the snap start signal to be emited anyway */
mv_ctx->last_snap_ts = NULL;
}
if (mv_ctx->last_snap_ts == NULL) {
mv_ctx->last_snaped1 = obj1;
mv_ctx->last_snaped2 = obj2;
mv_ctx->last_snap_ts = timecode;
g_signal_emit (timeline, ges_timeline_signals[SNAPING_STARTED], 0,
obj1, obj2, *timecode);
}
}
static GstClockTime *
ges_timeline_snap_position (GESTimeline * timeline,
GESTrackElement * trackelement, GstClockTime * current,
GstClockTime timecode, gboolean emit)
{
GESTimelinePrivate *priv = timeline->priv;
GSequenceIter *iter, *end_iter;
GESContainer *container = get_toplevel_container (trackelement);
GstClockTime *ret = NULL;
GstClockTime smallest_offset = G_MAXUINT64;
GstClockTime tmp_pos;
tmp_pos = timecode - priv->snapping_distance;
/* Rippling, not snapping with previous elements */
if (priv->movecontext.moving_trackelements)
tmp_pos = timecode;
iter = g_sequence_search (priv->starts_ends, &tmp_pos,
(GCompareDataFunc) compare_uint64, NULL);
tmp_pos = timecode + priv->snapping_distance;
end_iter = g_sequence_search (priv->starts_ends, &tmp_pos,
(GCompareDataFunc) compare_uint64, NULL);
for (; iter != end_iter && !g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter)) {
GstClockTime *iter_tc = g_sequence_get (iter);
GESTrackElement *tmp_trackelement =
g_hash_table_lookup (priv->by_object, iter_tc);
GESContainer *tmp_container = get_toplevel_container (tmp_trackelement);
GstClockTimeDiff diff;
if (tmp_container == container)
continue;
if (g_hash_table_lookup (priv->movecontext.toplevel_containers,
tmp_container))
continue;
if (timecode > *iter_tc)
diff = timecode - *iter_tc;
else
diff = *iter_tc - timecode;
if (diff > smallest_offset)
break;
smallest_offset = diff;
ret = iter_tc;
}
/* We emit the snapping signal only if we snapped with a different value
* than the current one */
if (emit) {
GstClockTime snap_time = ret ? *ret : GST_CLOCK_TIME_NONE;
if (!timeline->priv->needs_rollback)
ges_timeline_emit_snappig (timeline, trackelement, ret);
else
ges_timeline_emit_snappig (timeline, trackelement, NULL);
GST_DEBUG_OBJECT (timeline, "Snaping at %" GST_TIME_FORMAT,
GST_TIME_ARGS (snap_time));
}
return ret;
}
static inline GESContainer *
add_toplevel_container (MoveContext * mv_ctx, GESTrackElement * trackelement)
{
guint layer_prio;
GESContainer *toplevel = get_toplevel_container (trackelement);
/* Avoid recalculating */
if (!g_hash_table_lookup (mv_ctx->toplevel_containers, toplevel)) {
if (GES_IS_CLIP (toplevel)) {
layer_prio = ges_clip_get_layer_priority (GES_CLIP (toplevel));
if (layer_prio == (guint32) - 1) {
GST_WARNING_OBJECT (toplevel, "Not in any layer, can not move"
" between layers");
return toplevel;
}
mv_ctx->min_move_layer = MIN (mv_ctx->min_move_layer, layer_prio);
mv_ctx->max_layer_prio = MAX (mv_ctx->max_layer_prio, layer_prio);
} else if GES_IS_GROUP
(toplevel) {
mv_ctx->min_move_layer = MIN (mv_ctx->min_move_layer,
_PRIORITY (toplevel));
mv_ctx->max_layer_prio = MAX (mv_ctx->max_layer_prio,
_PRIORITY (toplevel) + GES_CONTAINER_HEIGHT (toplevel));
} else
g_assert_not_reached ();
mv_ctx->start = MIN (mv_ctx->start, GES_TIMELINE_ELEMENT_START (toplevel));
g_hash_table_insert (mv_ctx->toplevel_containers, toplevel, toplevel);
}
return toplevel;
}
static gboolean
ges_move_context_set_objects (GESTimeline * timeline, GESTrackElement * obj,
GESEdge edge)
{
TrackObjIters *iters;
GESTrackElement *tmptrackelement;
guint64 start, tmpend, moving_point = _START (obj);
GSequenceIter *iter, *trackelement_iter, *tmpiter;
MoveContext *mv_ctx = &timeline->priv->movecontext;
iters = g_hash_table_lookup (timeline->priv->obj_iters, obj);
trackelement_iter = iters->iter_obj;
switch (edge) {
case GES_EDGE_START:
/* set it properly in the context of "trimming" */
mv_ctx->max_trim_pos = 0;
mv_ctx->min_trim_pos = 0;
start = _START (obj);
if (g_sequence_iter_is_begin (trackelement_iter))
break;
/* Look for the objects */
for (iter = g_sequence_iter_prev (trackelement_iter);
iter && !g_sequence_iter_is_end (iter);
iter = g_sequence_iter_prev (iter)) {
tmptrackelement = GES_TRACK_ELEMENT (g_sequence_get (iter));
tmpend = _START (tmptrackelement) + _DURATION (tmptrackelement);
if (tmpend <= start && GES_TIMELINE_ELEMENT_PARENT (tmptrackelement)
!= GES_TIMELINE_ELEMENT_PARENT (obj)) {
mv_ctx->max_trim_pos =
MAX (mv_ctx->max_trim_pos, _START (tmptrackelement));
mv_ctx->min_trim_pos = MAX (mv_ctx->min_trim_pos,
_START (tmptrackelement) - _INPOINT (tmptrackelement));
mv_ctx->moving_trackelements =
g_list_prepend (mv_ctx->moving_trackelements, tmptrackelement);
}
if (g_sequence_iter_is_begin (iter))
break;
}
break;
case GES_EDGE_END:
moving_point = _START (obj) + _DURATION (obj);
/* fall-through */
case GES_EDGE_NONE: /* In this case only works for ripple */
mv_ctx->max_trim_pos = G_MAXUINT64;
iter = trackelement_iter;
tmpiter = g_sequence_iter_prev (iter);
/* Make sure to get the first TimelineElement starting at
* @moving_point */
while (tmpiter && !g_sequence_iter_is_end (tmpiter)) {
tmptrackelement = GES_TRACK_ELEMENT (g_sequence_get (iter));
if (GES_TIMELINE_ELEMENT_START (tmptrackelement) != moving_point)
break;
iter = tmpiter;
tmpiter = g_sequence_iter_prev (tmpiter);
if (g_sequence_iter_is_begin (tmpiter))
break;
}
/* Look for folowing objects */
for (; iter && !g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter)) {
tmptrackelement = GES_TRACK_ELEMENT (g_sequence_get (iter));
if (_START (tmptrackelement) >= moving_point &&
GES_TIMELINE_ELEMENT_PARENT (tmptrackelement) !=
GES_TIMELINE_ELEMENT_PARENT (obj)) {
tmpend = _START (tmptrackelement) + _DURATION (tmptrackelement);
mv_ctx->max_trim_pos = MIN (mv_ctx->max_trim_pos, tmpend);
mv_ctx->moving_trackelements =
g_list_prepend (mv_ctx->moving_trackelements, tmptrackelement);
}
}
break;
default:
GST_DEBUG ("Edge type %d no supported", edge);
return FALSE;
}
return TRUE;
}
static gboolean
ges_timeline_set_moving_context (GESTimeline * timeline, GESTrackElement * obj,
GESEditMode mode, GESEdge edge, GList * layers)
{
/* A TrackElement that could initiate movement for other object */
GESTrackElement *editor_trackelement = NULL;
MoveContext *mv_ctx = &timeline->priv->movecontext;
GESClip *clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (obj));
/* Still in the same mv_ctx */
if ((mv_ctx->clip == clip && mv_ctx->mode == mode &&
mv_ctx->edge == edge && !mv_ctx->needs_move_ctx)) {
GST_DEBUG ("Keeping the same moving mv_ctx");
return TRUE;
}
GST_DEBUG_OBJECT (clip,
"Changing context:\nold: obj: %p, mode: %d, edge: %d \n"
"new: obj: %p, mode: %d, edge: %d ! Has changed %i", mv_ctx->clip,
mv_ctx->mode, mv_ctx->edge, clip, mode, edge, mv_ctx->needs_move_ctx);
/* Make sure snapping context is reset when changing the moving context */
ges_timeline_emit_snappig (timeline, NULL, NULL);
clean_movecontext (mv_ctx);
mv_ctx->edge = edge;
mv_ctx->mode = mode;
mv_ctx->clip = clip;
mv_ctx->needs_move_ctx = FALSE;
/* We try to find a Source inside the Clip so we can set the
* moving context Else we just move the selected one only */
if (GES_IS_SOURCE (obj) == FALSE) {
GList *tmp;
for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) {
if (GES_IS_SOURCE (tmp->data)) {
editor_trackelement = tmp->data;
break;
}
}
} else {
editor_trackelement = obj;
}
if (editor_trackelement) {
switch (mode) {
case GES_EDIT_MODE_RIPPLE:
case GES_EDIT_MODE_ROLL:
if (!(ges_move_context_set_objects (timeline, editor_trackelement,
edge)))
return FALSE;
default:
break;
}
add_toplevel_container (&timeline->priv->movecontext, editor_trackelement);
} else {
/* We add the main object to the toplevel_containers set */
add_toplevel_container (&timeline->priv->movecontext, obj);
}
return TRUE;
}
static gboolean
_trim_transition (GESTimeline * timeline, GESLayer * layer,
GESTrackElement * element, GESEdge edge, GstClockTime position)
{
GList *tmp;
if (!ges_layer_get_auto_transition (layer))
goto fail;
gst_object_unref (layer);
for (tmp = timeline->priv->auto_transitions; tmp; tmp = tmp->next) {
GESAutoTransition *auto_transition = tmp->data;
if (auto_transition->transition == GES_TRACK_ELEMENT (element)) {
/* Trimming an auto transition mean 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;
fail:
gst_object_unref (layer);
return FALSE;
}
gboolean
ges_timeline_trim_object_simple (GESTimeline * timeline,
GESTimelineElement * element, GList * layers, GESEdge edge,
guint64 position, gboolean snapping)
{
guint64 start, inpoint, duration, max_duration, *snapped, *cur;
gboolean ret = TRUE;
gint64 real_dur;
GESTrackElement *track_element;
if (GES_IS_TRANSITION (element)) {
return _trim_transition (timeline,
ges_clip_get_layer (GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (element))),
GES_TRACK_ELEMENT (element), edge, position);
} else if (GES_IS_SOURCE (element) == FALSE) {
return FALSE;
}
track_element = GES_TRACK_ELEMENT (element);
GST_DEBUG_OBJECT (track_element, "Trimming to %" GST_TIME_FORMAT
" %s snaping, edge %i", GST_TIME_ARGS (position),
snapping ? "Is" : "Not", edge);
start = _START (track_element);
g_object_get (track_element, "max-duration", &max_duration, NULL);
switch (edge) {
case GES_EDGE_START:
{
GESTimelineElement *toplevel;
GESChildrenControlMode old_mode;
gboolean use_inpoint;
toplevel = ges_timeline_element_get_toplevel_parent (element);
if (position < _START (toplevel) && _START (toplevel) < _START (element)) {
GST_DEBUG_OBJECT (toplevel, "Not trimming %p as not at begining "
"of the container", element);
gst_object_unref (toplevel);
return FALSE;
}
old_mode = GES_CONTAINER (toplevel)->children_control_mode;
if (GES_IS_GROUP (toplevel) && old_mode == GES_CHILDREN_UPDATE) {
GST_DEBUG_OBJECT (toplevel, "Setting children udpate mode to"
" UPDDATE_ALL_VALUES so we can trim without moving the contained");
/* The container will update its values itself according to new
* values of the children */
GES_CONTAINER (toplevel)->children_control_mode =
GES_CHILDREN_UPDATE_ALL_VALUES;
}
inpoint = _INPOINT (track_element);
duration = _DURATION (track_element);
if (snapping) {
cur = g_hash_table_lookup (timeline->priv->by_start, track_element);
snapped = ges_timeline_snap_position (timeline, track_element, cur,
position, TRUE);
if (snapped)
position = *snapped;
}
/* Calculate new values */
position = MIN (position, start + duration);
use_inpoint =
GES_TIMELINE_ELEMENT_GET_CLASS (track_element)->set_inpoint ? TRUE :
FALSE;
if (use_inpoint && inpoint + position < start) {
GST_ERROR_OBJECT (timeline, "Track element %s inpoint %" GST_TIME_FORMAT
" would be negative,"
" not trimming", GES_TIMELINE_ELEMENT_NAME (track_element),
GST_TIME_ARGS (inpoint));
gst_object_unref (toplevel);
return FALSE;
}
inpoint = inpoint + position - start;
real_dur = _END (element) - position;
if (use_inpoint)
duration = CLAMP (real_dur, 0, max_duration > inpoint ?
max_duration - inpoint : G_MAXUINT64);
else
duration = real_dur;
/* If we already are at max duration or duration == 0 do no useless work */
if ((duration == _DURATION (track_element) &&
_DURATION (track_element) == _MAXDURATION (track_element)) ||
(duration == 0 && _DURATION (element) == 0)) {
GST_DEBUG_OBJECT (track_element,
"Duration already == max_duration, no triming");
gst_object_unref (toplevel);
return FALSE;
}
timeline->priv->needs_transitions_update = FALSE;
_set_start0 (GES_TIMELINE_ELEMENT (track_element), position);
_set_inpoint0 (GES_TIMELINE_ELEMENT (track_element), inpoint);
timeline->priv->needs_transitions_update = TRUE;
_set_duration0 (GES_TIMELINE_ELEMENT (track_element), duration);
if (GES_IS_GROUP (toplevel))
GES_CONTAINER (toplevel)->children_control_mode = old_mode;
gst_object_unref (toplevel);
break;
}
case GES_EDGE_END:
{
cur = g_hash_table_lookup (timeline->priv->by_end, track_element);
snapped = ges_timeline_snap_position (timeline, track_element, cur,
position, TRUE);
if (snapped)
position = *snapped;
/* Calculate new values */
real_dur = position - start;
duration = MAX (0, real_dur);
duration = MIN (duration, max_duration - _INPOINT (track_element));
/* Not moving, avoid overhead */
if (duration == _DURATION (track_element)) {
GST_DEBUG_OBJECT (track_element, "No change in duration");
return FALSE;
}
_set_duration0 (GES_TIMELINE_ELEMENT (track_element), duration);
break;
}
default:
GST_WARNING ("Can not trim with %i GESEdge", edge);
return FALSE;
}
return ret;
}
gboolean
timeline_ripple_object (GESTimeline * timeline, GESTrackElement * obj,
GList * layers, GESEdge edge, guint64 position)
{
GList *tmp, *moved_clips = NULL;
GESTrackElement *trackelement;
GESContainer *container;
guint64 duration, new_start, *snapped, *cur;
gint64 offset;
MoveContext *mv_ctx = &timeline->priv->movecontext;
mv_ctx->ignore_needs_ctx = TRUE;
timeline->priv->needs_rollback = FALSE;
if (!ges_timeline_set_moving_context (timeline, obj, GES_EDIT_MODE_RIPPLE,
edge, layers))
goto error;
switch (edge) {
case GES_EDGE_NONE:
GST_DEBUG ("Simply rippling");
/* We should be smart here to avoid recalculate transitions when possible */
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
if (snapped)
position = *snapped;
offset = position - _START (obj);
for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) {
trackelement = GES_TRACK_ELEMENT (tmp->data);
new_start = _START (trackelement) + offset;
container = add_toplevel_container (mv_ctx, trackelement);
/* Make sure not to move 2 times the same Clip */
if (g_list_find (moved_clips, container) == NULL) {
_set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start);
moved_clips = g_list_prepend (moved_clips, container);
}
}
g_list_free (moved_clips);
_set_start0 (GES_TIMELINE_ELEMENT (obj), position);
moved_clips = NULL;
if (timeline->priv->needs_rollback && !timeline->priv->rolling_back) {
timeline->priv->rolling_back = TRUE;
for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) {
trackelement = GES_TRACK_ELEMENT (tmp->data);
new_start = _START (trackelement) - offset;
container = add_toplevel_container (mv_ctx, trackelement);
/* Make sure not to move 2 times the same Clip */
if (g_list_find (moved_clips, container) == NULL) {
_set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start);
moved_clips = g_list_prepend (moved_clips, container);
}
}
g_list_free (moved_clips);
moved_clips = NULL;
_set_start0 (GES_TIMELINE_ELEMENT (obj), position - offset);
ges_timeline_emit_snappig (timeline, obj, NULL);
mv_ctx->needs_move_ctx = TRUE;
timeline->priv->rolling_back = FALSE;
goto error;
}
break;
case GES_EDGE_END:
timeline->priv->needs_transitions_update = FALSE;
GST_DEBUG ("Rippling end");
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
if (snapped)
position = *snapped;
duration = _DURATION (obj);
if (!ges_timeline_trim_object_simple (timeline,
GES_TIMELINE_ELEMENT (obj), NULL, GES_EDGE_END, position,
FALSE)) {
return FALSE;
}
offset = _DURATION (obj) - duration;
for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) {
trackelement = GES_TRACK_ELEMENT (tmp->data);
new_start = _START (trackelement) + offset;
container = add_toplevel_container (mv_ctx, trackelement);
if (GES_IS_GROUP (container))
container->children_control_mode = GES_CHILDREN_UPDATE_OFFSETS;
/* Make sure not to move 2 times the same Clip */
if (g_list_find (moved_clips, container) == NULL) {
_set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start);
moved_clips = g_list_prepend (moved_clips, container);
}
if (GES_IS_GROUP (container))
container->children_control_mode = GES_CHILDREN_UPDATE;
}
g_list_free (moved_clips);
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");
timeline->priv->movecontext.needs_move_ctx = TRUE;
timeline_trim_object (timeline, obj, layers, edge, position);
break;
default:
GST_DEBUG ("Can not ripple edge: %i", edge);
break;
}
mv_ctx->ignore_needs_ctx = FALSE;
return TRUE;
error:
mv_ctx->ignore_needs_ctx = FALSE;
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;
}
gboolean
timeline_trim_object (GESTimeline * timeline, GESTrackElement * object,
GList * layers, GESEdge edge, guint64 position)
{
gboolean ret = FALSE;
GstClockTime cpos;
MoveContext *mv_ctx = &timeline->priv->movecontext;
mv_ctx->ignore_needs_ctx = TRUE;
timeline->priv->needs_rollback = FALSE;
if (!ges_timeline_set_moving_context (timeline, object, GES_EDIT_MODE_TRIM,
edge, layers))
goto end;
switch (edge) {
case GES_EDGE_START:
cpos = GES_TIMELINE_ELEMENT_START (object);
break;
case GES_EDGE_END:
cpos = GES_TIMELINE_ELEMENT_END (object);
break;
default:
goto end;
}
ret = ges_timeline_trim_object_simple (timeline,
GES_TIMELINE_ELEMENT (object), layers, edge, position, TRUE);
if (timeline->priv->needs_rollback && !timeline->priv->rolling_back) {
timeline->priv->rolling_back = TRUE;
ret = FALSE;
timeline_trim_object (timeline, object, layers, edge, cpos);
ges_timeline_emit_snappig (timeline, object, NULL);
timeline->priv->rolling_back = FALSE;
}
end:
mv_ctx->ignore_needs_ctx = FALSE;
return ret;
}
gboolean
timeline_roll_object (GESTimeline * timeline, GESTrackElement * obj,
GList * layers, GESEdge edge, guint64 position)
{
MoveContext *mv_ctx = &timeline->priv->movecontext;
guint64 start, duration, end, tmpstart, tmpduration, tmpend, *snapped, *cur;
gboolean ret = TRUE;
GList *tmp;
mv_ctx->ignore_needs_ctx = TRUE;
GST_DEBUG_OBJECT (obj, "Rolling object to %" GST_TIME_FORMAT,
GST_TIME_ARGS (position));
if (!ges_timeline_set_moving_context (timeline, obj, GES_EDIT_MODE_ROLL,
edge, layers))
goto error;
start = _START (obj);
duration = _DURATION (obj);
end = start + duration;
timeline->priv->needs_transitions_update = FALSE;
switch (edge) {
case GES_EDGE_START:
/* Avoid negative durations */
if (position < mv_ctx->max_trim_pos || position > end ||
position < mv_ctx->min_trim_pos)
goto error;
cur = g_hash_table_lookup (timeline->priv->by_start, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
if (snapped)
position = *snapped;
ret &= ges_timeline_trim_object_simple (timeline,
GES_TIMELINE_ELEMENT (obj), layers, GES_EDGE_START, position, FALSE);
if (!ret) {
GST_INFO_OBJECT (timeline, "Could not trim %s",
GES_TIMELINE_ELEMENT_NAME (obj));
return FALSE;
}
/* In the case we reached max_duration we just make sure to roll
* everything to the real new position */
position = _START (obj);
/* Send back changes to the neighbourhood */
for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) {
GESTimelineElement *tmpelement = GES_TIMELINE_ELEMENT (tmp->data);
tmpstart = _START (tmpelement);
tmpduration = _DURATION (tmpelement);
tmpend = tmpstart + tmpduration;
/* Check that the object should be resized at this position
* even if an error accurs, we keep doing our job */
if (tmpend == start) {
ret &= ges_timeline_trim_object_simple (timeline, tmpelement, NULL,
GES_EDGE_END, position, FALSE);
break;
}
}
break;
case GES_EDGE_END:
/* Avoid negative durations */
if (position > mv_ctx->max_trim_pos || position < start)
goto error;
end = _START (obj) + _DURATION (obj);
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position, TRUE);
if (snapped)
position = *snapped;
ret &= ges_timeline_trim_object_simple (timeline,
GES_TIMELINE_ELEMENT (obj), NULL, GES_EDGE_END, position, FALSE);
if (ret == FALSE) {
GST_DEBUG_OBJECT (timeline, "No triming, bailing out");
goto done;
}
/* In the case we reached max_duration we just make sure to roll
* everything to the real new position */
position = _START (obj) + _DURATION (obj);
/* Send back changes to the neighbourhood */
for (tmp = mv_ctx->moving_trackelements; tmp; tmp = tmp->next) {
GESTimelineElement *tmpelement = GES_TIMELINE_ELEMENT (tmp->data);
tmpstart = _START (tmpelement);
tmpduration = _DURATION (tmpelement);
tmpend = tmpstart + tmpduration;
/* Check that the object should be resized at this position
* even if an error accure, we keep doing our job */
if (end == tmpstart) {
ret &= ges_timeline_trim_object_simple (timeline, tmpelement, NULL,
GES_EDGE_START, position, FALSE);
}
}
break;
default:
GST_DEBUG ("Edge type %i not handled here", edge);
break;
}
done:
timeline->priv->needs_transitions_update = TRUE;
mv_ctx->ignore_needs_ctx = FALSE;
return ret;
error:
GST_DEBUG_OBJECT (obj, "Could not roll edge %d to %" GST_TIME_FORMAT,
edge, GST_TIME_ARGS (position));
ret = FALSE;
goto done;
}
gboolean
timeline_move_object (GESTimeline * timeline, GESTrackElement * object,
GList * layers, GESEdge edge, guint64 position)
{
if (!ges_timeline_set_moving_context (timeline, object, GES_EDIT_MODE_NORMAL,
edge, layers)) {
GST_DEBUG_OBJECT (object, "Could not move to %" GST_TIME_FORMAT,
GST_TIME_ARGS (position));
return FALSE;
}
return ges_timeline_move_object_simple (timeline,
GES_TIMELINE_ELEMENT (object), layers, edge, position);
}
gboolean
ges_timeline_move_object_simple (GESTimeline * timeline,
GESTimelineElement * element, GList * layers, GESEdge edge,
guint64 position)
{
GstClockTime cpos = GES_TIMELINE_ELEMENT_START (element);
guint64 *snap_end, *snap_st, *cur, position_offset, off1, off2, top_end;
GESTrackElement *track_element;
GESContainer *toplevel;
/* We only work with GESSource-s and we check that we are not already moving
* the specified element ourself */
if (GES_IS_SOURCE (element) == FALSE ||
g_list_find (timeline->priv->movecontext.moving_trackelements, element))
return FALSE;
timeline->priv->needs_rollback = FALSE;
track_element = GES_TRACK_ELEMENT (element);
toplevel = get_toplevel_container (track_element);
position_offset = position - _START (track_element);
top_end = _START (toplevel) + _DURATION (toplevel) + position_offset;
cur = g_hash_table_lookup (timeline->priv->by_end, track_element);
GST_DEBUG_OBJECT (timeline, "Moving %" GST_PTR_FORMAT " to %"
GST_TIME_FORMAT " (end %" GST_TIME_FORMAT ")", element,
GST_TIME_ARGS (position), GST_TIME_ARGS (top_end));
snap_end = ges_timeline_snap_position (timeline, track_element, cur, top_end,
FALSE);
if (snap_end)
off1 = top_end > *snap_end ? top_end - *snap_end : *snap_end - top_end;
else
off1 = G_MAXUINT64;
cur = g_hash_table_lookup (timeline->priv->by_start, track_element);
snap_st =
ges_timeline_snap_position (timeline, track_element, cur, position,
FALSE);
if (snap_st)
off2 = position > *snap_st ? position - *snap_st : *snap_st - position;
else
off2 = G_MAXUINT64;
/* In the case we could snap on both sides, we snap on the end */
if (snap_end && off1 <= off2) {
position = position + *snap_end - top_end;
ges_timeline_emit_snappig (timeline, track_element, snap_end);
} else if (snap_st) {
position = position + *snap_st - position;
ges_timeline_emit_snappig (timeline, track_element, snap_st);
} else
ges_timeline_emit_snappig (timeline, track_element, NULL);
timeline->priv->needs_rollback = FALSE;
_set_start0 (GES_TIMELINE_ELEMENT (track_element), position);
if (timeline->priv->needs_rollback && !timeline->priv->rolling_back) {
timeline->priv->needs_rollback = FALSE;
timeline->priv->rolling_back = TRUE;
ges_timeline_move_object_simple (timeline, element, layers, edge, cpos);
ges_timeline_emit_snappig (timeline, track_element, NULL);
timeline->priv->rolling_back = FALSE;
return FALSE;
}
return TRUE;
}
gboolean
timeline_context_to_layer (GESTimeline * timeline, gint offset)
{
gboolean ret = TRUE;
GHashTableIter iter;
GESContainer *key, *value;
GESLayer *new_layer;
guint prio;
MoveContext *mv_ctx = &timeline->priv->movecontext;
/* Layer's priority is always positive */
if (offset == 0)
return ret;
if (offset < 0 && mv_ctx->min_move_layer < -offset)
return ret;
GST_DEBUG ("Moving %d object, offset %d",
g_hash_table_size (mv_ctx->toplevel_containers), offset);
mv_ctx->ignore_needs_ctx = TRUE;
timeline->priv->needs_rollback = FALSE;
g_hash_table_iter_init (&iter, mv_ctx->toplevel_containers);
while (g_hash_table_iter_next (&iter, (gpointer *) & key,
(gpointer *) & value)) {
if (GES_IS_CLIP (value)) {
prio = ges_clip_get_layer_priority (GES_CLIP (value));
/* We know that the layer exists as we created it */
new_layer = GES_LAYER (g_list_nth_data (timeline->layers, prio + offset));
if (new_layer == NULL) {
do {
new_layer = ges_timeline_append_layer (timeline);
} while (ges_layer_get_priority (new_layer) < prio + offset);
}
mv_ctx->moving_to_layer = new_layer;
ret &= ges_clip_move_to_layer (GES_CLIP (key), new_layer);
} else if (GES_IS_GROUP (value)) {
guint32 last_prio = _PRIORITY (value) + offset +
GES_CONTAINER_HEIGHT (value) - 1;
new_layer = GES_LAYER (g_list_nth_data (timeline->layers, last_prio));
if (new_layer == NULL) {
do {
new_layer = ges_timeline_append_layer (timeline);
} while (ges_layer_get_priority (new_layer) < last_prio);
}
mv_ctx->moving_to_layer = NULL;
_set_priority0 (GES_TIMELINE_ELEMENT (value), _PRIORITY (value) + offset);
}
}
/* Readjust min_move_layer */
mv_ctx->min_move_layer = mv_ctx->min_move_layer + offset;
mv_ctx->ignore_needs_ctx = FALSE;
if (timeline->priv->needs_rollback && !timeline->priv->rolling_back) {
ret = FALSE;
timeline->priv->rolling_back = TRUE;
timeline_context_to_layer (timeline, -offset);
timeline->priv->rolling_back = FALSE;
}
mv_ctx->moving_to_layer = NULL;
return ret;
}
void
timeline_add_group (GESTimeline * timeline, GESGroup * group)
{
GST_DEBUG_OBJECT (timeline, "Adding group %" GST_PTR_FORMAT, group);
timeline->priv->movecontext.needs_move_ctx = TRUE;
timeline->priv->groups = g_list_prepend (timeline->priv->groups,
gst_object_ref_sink (group));
ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (group), timeline);
}
/**
* timeline_emit_group_added:
* @timeline: a #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: a #GESTimeline
* @group: group that was removed
* @array: (element-type GESTimelineElement): children that were 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);
timeline->priv->movecontext.needs_move_ctx = TRUE;
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 ();
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);
}
}
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;
}
for (i = 0, tmp = timeline->tracks; tmp; tmp = tmp->next, i++) {
GESTrack *track = GES_TRACK (tmp->data);
if (((track->type & types) == 0 || (track->type & visited_type)))
continue;
list = ges_clip_create_track_elements (clip, track->type);
g_list_free (list);
}
}
static void
layer_auto_transition_changed_cb (GESLayer * layer,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
GList *tmp, *clips;
timeline->priv->needs_rollback = FALSE;
_create_transitions_on_layer (timeline, layer, NULL, NULL,
_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);
if (timeline->priv->needs_rollback) {
GList *tmp, *trans;
ges_layer_set_auto_transition (layer, FALSE);
GST_ERROR_OBJECT (layer, "Has overlapping transition, "
" we can't handle that, setting auto_transition"
" to FALSE, and removing all transitions");
trans = g_list_copy (timeline->priv->auto_transitions);
for (tmp = trans; tmp; tmp = tmp->next) {
g_signal_emit_by_name (tmp->data, "destroy-me");
}
g_list_free (trans);
trans = ges_layer_get_clips (layer);
for (tmp = trans; tmp; tmp = tmp->next) {
if (GES_IS_TRANSITION_CLIP (tmp->data))
ges_layer_remove_clip (layer, tmp->data);
}
g_list_free_full (trans, 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);
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));
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);
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));
}
g_clear_object (&existing_src);
track_element_copy =
GES_TRACK_ELEMENT (ges_timeline_element_copy (GES_TIMELINE_ELEMENT
(track_element), TRUE));
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);
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));
gst_object_unref (track_element_copy);
g_ptr_array_unref (tracks);
return;
}
gst_object_unref (track);
}
timeline->priv->ignore_track_element_added = NULL;
g_ptr_array_unref (tracks);
}
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->priv->movecontext.needs_move_ctx = TRUE;
_create_transitions_on_layer (timeline, layer, NULL, NULL,
_find_transition_from_auto_transitions);
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 ("Clip %p removed from layer %p", 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 void
trackelement_start_changed_cb (GESTrackElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
GESTimelinePrivate *priv = timeline->priv;
TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters, child);
if (G_LIKELY (iters->iter_by_layer))
g_sequence_sort_changed (iters->iter_by_layer,
(GCompareDataFunc) element_start_compare, NULL);
if (GES_IS_SOURCE (child)) {
sort_track_elements (timeline, iters);
sort_starts_ends_start (timeline, iters);
sort_starts_ends_end (timeline, iters);
/* If the timeline is set to snap objects together, we
* are sure that all movement of TrackElement-s are done within
* the moving context, so we do not need to recalculate the
* move context as often */
if (timeline->priv->movecontext.ignore_needs_ctx &&
timeline->priv->snapping_distance == 0)
timeline->priv->movecontext.needs_move_ctx = TRUE;
timeline_create_transitions (timeline, child);
}
}
static void
trackelement_priority_changed_cb (GESTrackElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
GESTimelinePrivate *priv = timeline->priv;
GList *layer_node = g_list_find_custom (timeline->layers,
GINT_TO_POINTER (_ges_track_element_get_layer_priority (child)),
(GCompareFunc) find_layer_by_prio);
GESLayer *layer = layer_node ? layer_node->data : NULL;
TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters,
child);
if (G_UNLIKELY (layer == NULL)) {
GST_ERROR_OBJECT (timeline,
"Changing a TrackElement prio, which would not "
"land in no layer we are controlling");
if (iters->iter_by_layer)
g_sequence_remove (iters->iter_by_layer);
iters->iter_by_layer = NULL;
iters->layer = NULL;
} else {
/* If it moves from layer, properly change it */
if (layer != iters->layer) {
GSequence *by_layer_sequence =
g_hash_table_lookup (priv->by_layer, layer);
GST_DEBUG_OBJECT (child, "Moved from layer %" GST_PTR_FORMAT
"(prio %d) to" " %" GST_PTR_FORMAT " (prio %d)", layer,
ges_layer_get_priority (layer), iters->layer,
ges_layer_get_priority (iters->layer));
g_sequence_remove (iters->iter_by_layer);
iters->iter_by_layer =
g_sequence_insert_sorted (by_layer_sequence, child,
(GCompareDataFunc) element_start_compare, NULL);
iters->layer = layer;
} else {
g_sequence_sort_changed (iters->iter_by_layer,
(GCompareDataFunc) element_start_compare, NULL);
}
}
if (GES_IS_SOURCE (child))
sort_track_elements (timeline, iters);
}
static void
trackelement_duration_changed_cb (GESTrackElement * child,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
GESTimelinePrivate *priv = timeline->priv;
TrackObjIters *iters = g_hash_table_lookup (priv->obj_iters, child);
if (GES_IS_SOURCE (child)) {
sort_starts_ends_end (timeline, iters);
/* If the timeline is set to snap objects together, we
* are sure that all movement of TrackElement-s are done within
* the moving context, so we do not need to recalculate the
* move context as often */
if (timeline->priv->movecontext.ignore_needs_ctx &&
timeline->priv->snapping_distance == 0) {
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
timeline_create_transitions (timeline, child);
}
}
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);
g_signal_connect_after (GES_TRACK_ELEMENT (track_element),
"notify::duration", G_CALLBACK (trackelement_duration_changed_cb),
timeline);
g_signal_connect_after (GES_TRACK_ELEMENT (track_element),
"notify::priority", G_CALLBACK (trackelement_priority_changed_cb),
timeline);
start_tracking_track_element (timeline, track_element);
}
static void
track_element_removed_cb (GESTrack * track,
GESTrackElement * track_element, GESTimeline * timeline)
{
if (GES_IS_SOURCE (track_element)) {
/* Make sure to reinitialise the moving context next time */
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
/* Disconnect all signal handlers */
g_signal_handlers_disconnect_by_func (track_element,
trackelement_start_changed_cb, timeline);
g_signal_handlers_disconnect_by_func (track_element,
trackelement_duration_changed_cb, timeline);
g_signal_handlers_disconnect_by_func (track_element,
trackelement_priority_changed_cb, timeline);
stop_tracking_track_element (timeline, track_element);
}
static GstPadProbeReturn
_pad_probe_cb (GstPad * mixer_pad, GstPadProbeInfo * info,
GESTimeline * timeline)
{
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
if (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START) {
LOCK_DYN (timeline);
if (timeline->priv->group_id == -1) {
if (!gst_event_parse_group_id (event, &timeline->priv->group_id))
timeline->priv->group_id = gst_util_group_id_next ();
}
info->data = gst_event_make_writable (event);
gst_event_set_group_id (GST_PAD_PROBE_INFO_EVENT (info),
timeline->priv->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->timeline, NULL);
UNLOCK_DYN (tr_priv->timeline);
}
gboolean
timeline_add_element (GESTimeline * timeline, GESTimelineElement * element)
{
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;
}
g_hash_table_insert (timeline->priv->all_elements,
ges_timeline_element_get_name (element), gst_object_ref (element));
return TRUE;
}
gboolean
timeline_remove_element (GESTimeline * timeline, GESTimelineElement * element)
{
return g_hash_table_remove (timeline->priv->all_elements, element->name);
}
void
timeline_fill_gaps (GESTimeline * timeline)
{
GList *tmp;
for (tmp = timeline->tracks; tmp; tmp = tmp->next) {
track_resort_and_fill_gaps (tmp->data);
}
}
/**** API *****/
/**
* ges_timeline_new:
*
* Creates a new empty #GESTimeline.
*
* 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 in case something wrong happens or %NULL
*
* 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 in case something wrong happens or %NULL
*
* Loads the contents of URI into the given timeline.
*
* Returns: %TRUE if the timeline was loaded successfully, or %FALSE if the uri
* could not be loaded.
*/
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: a #GESTimeline
* @uri: The location to save to
* @formatter_asset: (allow-none): The formatter asset to use or %NULL. If %NULL,
* will try to save in the same format as the one from which the timeline as been loaded
* or default to the formatter with highest rank
* @overwrite: %TRUE to overwrite file if it exists
* @error: (out) (allow-none): An error to be set in case something wrong happens or %NULL
*
* Saves the timeline to the given location
*
* Returns: %TRUE if the timeline was successfully saved to the given location,
* else %FALSE.
*/
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: a #GESTimeline
*
* Get the list of #GESGroup present in the Timeline.
*
* Returns: (transfer none) (element-type GESGroup): the list of
* #GESGroup that contain clips present in the timeline's layers.
* Must not be changed.
*/
GList *
ges_timeline_get_groups (GESTimeline * timeline)
{
return timeline->priv->groups;
}
/**
* ges_timeline_append_layer:
* @timeline: a #GESTimeline
*
* Append a newly created #GESLayer to @timeline
* Note that you do not own any reference to the returned layer.
*
* Returns: (transfer none): The newly created #GESLayer, or the last (empty)
* #GESLayer of @timeline.
*/
GESLayer *
ges_timeline_append_layer (GESTimeline * timeline)
{
guint32 priority;
GESLayer *layer;
layer = ges_layer_new ();
priority = g_list_length (timeline->layers);
ges_layer_set_priority (layer, priority);
ges_timeline_add_layer (timeline, layer);
return layer;
}
/**
* ges_timeline_add_layer:
* @timeline: a #GESTimeline
* @layer: (transfer floating): the #GESLayer to add
*
* Add the layer to the timeline. The reference to the @layer will be stolen
* by the @timeline.
*
* Returns: %TRUE if the layer was properly added, else %FALSE.
*/
gboolean
ges_timeline_add_layer (GESTimeline * timeline, GESLayer * layer)
{
gboolean auto_transition;
GList *objects, *tmp;
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;
}
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);
g_hash_table_insert (timeline->priv->by_layer, layer, g_sequence_new (NULL));
/* 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);
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);
timeline->priv->movecontext.needs_move_ctx = TRUE;
return TRUE;
}
/**
* ges_timeline_remove_layer:
* @timeline: a #GESTimeline
* @layer: the #GESLayer to remove
*
* Removes the layer from the timeline. The reference that the @timeline holds on
* the layer will be dropped. If you wish to use the @layer after calling this
* method, you need to take a reference before calling.
*
* Returns: %TRUE if the layer was properly removed, else %FALSE.
*/
gboolean
ges_timeline_remove_layer (GESTimeline * timeline, GESLayer * layer)
{
GList *layer_objects, *tmp;
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_hash_table_remove (timeline->priv->by_layer, layer);
timeline->layers = g_list_remove (timeline->layers, layer);
ges_layer_set_timeline (layer, NULL);
g_signal_emit (timeline, ges_timeline_signals[LAYER_REMOVED], 0, layer);
gst_object_unref (layer);
timeline->priv->movecontext.needs_move_ctx = TRUE;
return TRUE;
}
/**
* ges_timeline_add_track:
* @timeline: a #GESTimeline
* @track: (transfer full): the #GESTrack to add
*
* Add a track to the timeline. The reference to the track will be stolen by the
* pipeline.
*
* Returns: %TRUE if the track was properly added, else %FALSE.
*/
/* 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;
GST_DEBUG ("timeline:%p, track:%p", timeline, track);
/* make sure we don't already control it */
if (G_UNLIKELY (g_list_find (timeline->tracks, (gconstpointer) track))) {
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)))) {
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;
/* Add the track to the list of tracks we track */
LOCK_DYN (timeline);
timeline->priv->priv_tracks = g_list_append (timeline->priv->priv_tracks,
tr_priv);
UNLOCK_DYN (timeline);
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);
/* 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: a #GESTimeline
* @track: the #GESTrack to remove
*
* Remove the @track from the @timeline. The reference stolen when adding the
* @track will be removed. If you wish to use the @track after calling this
* function you must ensure that you have a reference to it.
*
* Returns: %TRUE if the @track was properly removed, else %FALSE.
*/
/* 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: The #GstPad
*
* Search the #GESTrack corresponding to the given @timeline's @pad.
*
* Returns: (transfer none) (nullable): The corresponding #GESTrack if it is
* found, or %NULL if there is an error.
*/
GESTrack *
ges_timeline_get_track_for_pad (GESTimeline * timeline, GstPad * pad)
{
GList *tmp;
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: The #GESTrack
*
* Search the #GstPad corresponding to the given @timeline's @track.
*
* Returns: (transfer none) (nullable): The corresponding #GstPad if it is
* found, 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: a #GESTimeline
*
* Returns the list of #GESTrack used by the Timeline.
*
* Returns: (transfer full) (element-type GESTrack): A list of #GESTrack.
* The caller should unref each track once he is done with them.
*/
GList *
ges_timeline_get_tracks (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
return g_list_copy_deep (timeline->tracks, (GCopyFunc) gst_object_ref, NULL);
}
/**
* ges_timeline_get_layers:
* @timeline: a #GESTimeline
*
* Get the list of #GESLayer present in the Timeline.
*
* Returns: (transfer full) (element-type GESLayer): the list of
* #GESLayer present in the Timeline sorted by priority.
* The caller should unref each Layer once he is done with them.
*/
GList *
ges_timeline_get_layers (GESTimeline * timeline)
{
GList *tmp, *res = NULL;
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");
for (tmp = timeline->layers; tmp; tmp = tmp->next) {
GESLayer *layer = tmp->data;
_create_transitions_on_layer (timeline, layer, NULL, NULL,
_find_transition_from_auto_transitions);
/* 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 {
for (tmp = timeline->tracks; tmp; tmp = tmp->next) {
g_signal_connect (tmp->data, "commited", G_CALLBACK (track_commited_cb),
timeline);
if (!ges_track_commit (GES_TRACK (tmp->data)))
res = FALSE;
}
}
/* Make sure we reset the context */
timeline->priv->movecontext.needs_move_ctx = TRUE;
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
* directly executed in the non-linear engine. Call this method once you are
* done with a set of changes and want it to be executed.
*
* The #GESTimeline::commited signal will be emitted when the (possibly updated)
* #GstPipeline is ready to output data again, except if the state of the
* timeline was #GST_STATE_READY or #GST_STATE_NULL.
*
* Note that all the pending changes will automatically be executed when the
* timeline goes from #GST_STATE_READY to #GST_STATE_PAUSED, which usually is
* triggered by corresponding state changes in a containing #GESPipeline.
*
* You should not try to change the state of the timeline, seek it or add
* tracks to it during a commit operation, that is between a call to this
* function and after receiving the #GESTimeline::commited signal.
*
* See #ges_timeline_commit_sync if you don't want to bother with waiting
* for the signal.
*
* Returns: %TRUE if pending changes were commited or %FALSE if nothing needed
* to be commited
*/
gboolean
ges_timeline_commit (GESTimeline * timeline)
{
gboolean ret;
LOCK_DYN (timeline);
ret = ges_timeline_commit_unlocked (timeline);
UNLOCK_DYN (timeline);
ges_timeline_emit_snappig (timeline, NULL, NULL);
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 #GESClips contained in the
* @timeline.
*
* Will return once the update is complete, that is when the
* (possibly updated) #GstPipeline is ready to output data again, or if the
* state of the timeline was #GST_STATE_READY or #GST_STATE_NULL.
*
* This function will wait for any pending state change of the timeline by
* calling #gst_element_get_state with a #GST_CLOCK_TIME_NONE timeout, you
* should not try to change the state from another thread before this function
* has returned.
*
* See #ges_timeline_commit for more information.
*
* Returns: %TRUE if pending changes were commited or %FALSE if nothing needed
* to be commited
*/
gboolean
ges_timeline_commit_sync (GESTimeline * timeline)
{
gboolean ret;
gboolean wait_for_signal;
/* 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: a #GESTimeline
*
* Get the current duration of @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);
return timeline->priv->duration;
}
/**
* ges_timeline_get_auto_transition:
* @timeline: a #GESTimeline
*
* Gets whether transitions are automatically added when objects
* overlap or not.
*
* Returns: %TRUE if transitions are automatically added, else %FALSE.
*/
gboolean
ges_timeline_get_auto_transition (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), 0);
return timeline->priv->auto_transition;
}
/**
* ges_timeline_set_auto_transition:
* @timeline: a #GESLayer
* @auto_transition: whether the auto_transition is active
*
* Sets the layer to the given @auto_transition. See the documentation of the
* property auto_transition for more information.
*/
void
ges_timeline_set_auto_transition (GESTimeline * timeline,
gboolean auto_transition)
{
GList *layers;
GESLayer *layer;
g_return_if_fail (GES_IS_TIMELINE (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: a #GESTimeline
*
* Gets the configured snapping distance of the timeline. See
* the documentation of the property snapping_distance for more
* information.
*
* Returns: The @snapping_distance property of the timeline
*/
GstClockTime
ges_timeline_get_snapping_distance (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE);
return timeline->priv->snapping_distance;
}
/**
* ges_timeline_set_snapping_distance:
* @timeline: a #GESLayer
* @snapping_distance: whether the snapping_distance is active
*
* Sets the @snapping_distance of the timeline. See the documentation of the
* property snapping_distance for more information.
*/
void
ges_timeline_set_snapping_distance (GESTimeline * timeline,
GstClockTime snapping_distance)
{
g_return_if_fail (GES_IS_TIMELINE (timeline));
timeline->priv->snapping_distance = snapping_distance;
}
/**
* ges_timeline_get_element:
* @timeline: a #GESTimeline
*
* Gets a #GESTimelineElement contained in the timeline
*
* Returns: (transfer full) (nullable): The #GESTimelineElement or %NULL if
* not found.
*/
GESTimelineElement *
ges_timeline_get_element (GESTimeline * timeline, const gchar * name)
{
GESTimelineElement *ret;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
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: a #GESTimeline
*
* Check whether a #GESTimeline is empty or not
*
* Returns: %TRUE if the timeline is empty %FALSE otherwize
*/
gboolean
ges_timeline_is_empty (GESTimeline * timeline)
{
GHashTableIter iter;
gpointer key, value;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
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 retrive a layer from
* @priority: The priority of the layer to find
*
* Retrieve the layer with @priority as a priority
*
* Returns: (transfer full) (nullable): A #GESLayer or %NULL if no layer with
* @priority was found
*
* Since 1.6
*/
GESLayer *
ges_timeline_get_layer (GESTimeline * timeline, guint priority)
{
GList *tmp;
GESLayer *layer = NULL;
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 the #GESTimelineElement should be pasted
* @element: The #GESTimelineElement to paste
* @position: The position in the timeline the element should
* be pasted to, meaning it will become the start of @element
* @layer_priority: The #GESLayer to which the element should be pasted to.
* -1 means paste to the same layer from which the @element has been copied from.
*
* Paste @element inside the timeline. @element must have been
* created using ges_timeline_element_copy with deep=TRUE set,
* i.e. it must be a deep copy, otherwise it will fail.
*
* Returns: (transfer none): Shallow copy of the @element pasted
*/
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);
element_class = GES_TIMELINE_ELEMENT_GET_CLASS (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");
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");
}
res = element_class->paste (element, copied_from, position);
g_clear_object (&copied_from);
return g_object_ref (res);
}
/**
* ges_timeline_move_layer:
* @timeline: The timeline in which @layer must be
* @layer: The layer to move at @new_layer_priority
* @new_layer_priority: The index at which @layer should land
*
* Moves @layer at @new_layer_priority meaning that @layer
* we land at that position in the stack of layers inside
* the timeline. If @new_layer_priority is superior than the number
* of layers present in the time, it will move to the end of the
* stack of layers.
*/
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);
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;
}
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