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gstreamer/ges/ges-timeline.c
Tim-Philipp Müller a7347ca8f7 WIP: ges: fix API export/import and 'inconsistent linkage' on MSVC 
Export GES library API in headers when we're building the
library itself, otherwise import the API from the headers.

This fixes linker warnings on Windows when building with MSVC.

Fix up some missing config.h includes when building the lib which
is needed to get the export api define from config.h

Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/issues/42
2018-12-15 00:14:51 +00:00

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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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-project.h"
#include "ges-container.h"
#include "ges-timeline.h"
#include "ges-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);
GST_DEBUG_CATEGORY_STATIC (ges_timeline_debug);
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT ges_timeline_debug
/* lock to protect dynamic callbacks, like pad-added */
#define DYN_LOCK(timeline) (&GES_TIMELINE (timeline)->priv->dyn_mutex)
#define LOCK_DYN(timeline) G_STMT_START { \
GST_LOG_OBJECT (timeline, "Getting dynamic lock from %p", \
g_thread_self()); \
g_rec_mutex_lock (DYN_LOCK (timeline)); \
GST_LOG_OBJECT (timeline, "Got Dynamic lock from %p", \
g_thread_self()); \
} G_STMT_END
#define UNLOCK_DYN(timeline) G_STMT_START { \
GST_LOG_OBJECT (timeline, "Unlocking dynamic lock from %p", \
g_thread_self()); \
g_rec_mutex_unlock (DYN_LOCK (timeline)); \
GST_LOG_OBJECT (timeline, "Unlocked Dynamic lock from %p", \
g_thread_self()); \
} G_STMT_END
#define CHECK_THREAD(timeline) g_assert(timeline->priv->valid_thread == g_thread_self())
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;
GThread *valid_thread;
};
/* 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
};
G_DEFINE_TYPE_WITH_CODE (GESTimeline, ges_timeline, GST_TYPE_BIN,
G_ADD_PRIVATE (GESTimeline)
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init)
G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER,
ges_meta_container_interface_init));
static GstBinClass *parent_class;
static guint ges_timeline_signals[LAST_SIGNAL] = { 0 };
static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track);
static guint nb_assets = 0;
/* GESExtractable implementation */
static gchar *
extractable_check_id (GType type, const gchar * id)
{
gchar *res;
if (id == NULL)
res = g_strdup_printf ("%s-%i", "project", nb_assets);
else
res = g_strdup (id);
nb_assets++;
return res;
}
static gchar *
extractable_get_id (GESExtractable * self)
{
GESAsset *asset;
if (!(asset = ges_extractable_get_asset (self)))
return NULL;
return g_strdup (ges_asset_get_id (asset));
}
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->asset_type = GES_TYPE_PROJECT;
iface->check_id = (GESExtractableCheckId) extractable_check_id;
iface->get_id = extractable_get_id;
}
static void
ges_meta_container_interface_init (GESMetaContainerInterface * iface)
{
}
/* GObject Standard vmethods*/
static void
ges_timeline_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTimeline *timeline = GES_TIMELINE (object);
switch (property_id) {
case PROP_DURATION:
g_value_set_uint64 (value, timeline->priv->duration);
break;
case PROP_AUTO_TRANSITION:
g_value_set_boolean (value, timeline->priv->auto_transition);
break;
case PROP_SNAPPING_DISTANCE:
g_value_set_uint64 (value, timeline->priv->snapping_distance);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_timeline_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GESTimeline *timeline = GES_TIMELINE (object);
switch (property_id) {
case PROP_AUTO_TRANSITION:
ges_timeline_set_auto_transition (timeline, g_value_get_boolean (value));
break;
case PROP_SNAPPING_DISTANCE:
timeline->priv->snapping_distance = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_timeline_dispose (GObject * object)
{
GESTimeline *tl = GES_TIMELINE (object);
GESTimelinePrivate *priv = tl->priv;
GList *tmp, *groups;
while (tl->layers) {
GESLayer *layer = (GESLayer *) tl->layers->data;
ges_timeline_remove_layer (GES_TIMELINE (object), layer);
}
/* FIXME: it should be possible to remove tracks before removing
* layers, but at the moment this creates a problem because the track
* objects aren't notified that their nleobjects have been destroyed.
*/
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);
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 = ges_timeline_get_instance_private (self);
priv = self->priv;
self->layers = NULL;
self->tracks = NULL;
self->priv->duration = 0;
self->priv->auto_transition = FALSE;
priv->snapping_distance = 0;
priv->expected_async_done = 0;
priv->expected_commited = 0;
/* 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);
priv->valid_thread = g_thread_self ();
}
/* 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)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
CHECK_THREAD (timeline);
GST_DEBUG ("timeline:%p, layer:%p", timeline, layer);
/* We can only add a layer that doesn't already belong to another timeline */
if (G_UNLIKELY (layer->timeline)) {
GST_WARNING ("Layer belongs to another timeline, can't add it");
gst_object_ref_sink (layer);
gst_object_unref (layer);
return FALSE;
}
/* Add to the list of layers, make sure we don't already control it */
if (G_UNLIKELY (g_list_find (timeline->layers, (gconstpointer) layer))) {
GST_WARNING ("Layer is already controlled by this timeline");
gst_object_ref_sink (layer);
gst_object_unref (layer);
return FALSE;
}
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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_LAYER (layer), FALSE);
CHECK_THREAD (timeline);
GST_DEBUG ("timeline:%p, layer:%p", timeline, layer);
if (G_UNLIKELY (!g_list_find (timeline->layers, layer))) {
GST_WARNING ("Layer doesn't belong to this timeline");
return FALSE;
}
/* remove objects from any private data structures */
layer_objects = ges_layer_get_clips (layer);
for (tmp = layer_objects; tmp; tmp = tmp->next) {
layer_object_removed_cb (layer, GES_CLIP (tmp->data), timeline);
gst_object_unref (G_OBJECT (tmp->data));
tmp->data = NULL;
}
g_list_free (layer_objects);
/* Disconnect signals */
GST_DEBUG ("Disconnecting signal callbacks");
g_signal_handlers_disconnect_by_func (layer, layer_object_added_cb, timeline);
g_signal_handlers_disconnect_by_func (layer, layer_object_removed_cb,
timeline);
g_signal_handlers_disconnect_by_func (layer, layer_priority_changed_cb,
timeline);
g_signal_handlers_disconnect_by_func (layer,
layer_auto_transition_changed_cb, timeline);
g_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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
CHECK_THREAD (timeline);
GST_DEBUG ("timeline:%p, track:%p", timeline, track);
/* make sure we don't already control it */
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);
CHECK_THREAD (timeline);
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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
LOCK_DYN (timeline);
for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
if (pad == tr_priv->ghostpad) {
UNLOCK_DYN (timeline);
return tr_priv->track;
}
}
UNLOCK_DYN (timeline);
return NULL;
}
/**
* ges_timeline_get_pad_for_track:
* @timeline: The #GESTimeline
* @track: 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);
CHECK_THREAD (timeline);
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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
for (tmp = timeline->layers; tmp; tmp = g_list_next (tmp)) {
res = g_list_insert_sorted (res, gst_object_ref (tmp->data),
(GCompareFunc) sort_layers);
}
return res;
}
static void
track_commited_cb (GESTrack * track, GESTimeline * timeline)
{
gboolean emit_commited = FALSE;
GST_OBJECT_LOCK (timeline);
timeline->priv->expected_commited -= 1;
if (timeline->priv->expected_commited == 0)
emit_commited = TRUE;
g_signal_handlers_disconnect_by_func (track, track_commited_cb, timeline);
GST_OBJECT_UNLOCK (timeline);
if (emit_commited) {
g_signal_emit (timeline, ges_timeline_signals[COMMITED], 0);
}
}
/* Must be called with the timeline's DYN_LOCK */
static gboolean
ges_timeline_commit_unlocked (GESTimeline * timeline)
{
GList *tmp;
gboolean res = TRUE;
GST_DEBUG_OBJECT (timeline, "commiting changes");
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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
/* Let's make sure our state is stable */
gst_element_get_state (GST_ELEMENT (timeline), NULL, NULL,
GST_CLOCK_TIME_NONE);
/* Let's make sure no track gets added between now and the actual commiting */
LOCK_DYN (timeline);
wait_for_signal = g_list_length (timeline->priv->priv_tracks) > 0
&& GST_STATE (timeline) >= GST_STATE_PAUSED;
if (!wait_for_signal) {
ret = ges_timeline_commit_unlocked (timeline);
} else {
gulong handler_id =
g_signal_connect (timeline, "commited", (GCallback) commited_cb, NULL);
g_mutex_lock (&timeline->priv->commited_lock);
ret = ges_timeline_commit_unlocked (timeline);
g_cond_wait (&timeline->priv->commited_cond,
&timeline->priv->commited_lock);
g_mutex_unlock (&timeline->priv->commited_lock);
g_signal_handler_disconnect (timeline, handler_id);
}
UNLOCK_DYN (timeline);
return ret;
}
/**
* ges_timeline_get_duration:
* @timeline: 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);
CHECK_THREAD (timeline);
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), FALSE);
CHECK_THREAD (timeline);
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));
CHECK_THREAD (timeline);
timeline->priv->auto_transition = auto_transition;
g_object_notify (G_OBJECT (timeline), "auto-transition");
layers = timeline->layers;
for (; layers; layers = layers->next) {
layer = layers->data;
ges_layer_set_auto_transition (layer, auto_transition);
}
}
/**
* ges_timeline_get_snapping_distance:
* @timeline: 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);
CHECK_THREAD (timeline);
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));
CHECK_THREAD (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);
CHECK_THREAD (timeline);
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);
CHECK_THREAD (timeline);
if (g_hash_table_size (timeline->priv->all_elements) == 0)
return TRUE;
g_hash_table_iter_init (&iter, timeline->priv->all_elements);
while (g_hash_table_iter_next (&iter, &key, &value)) {
if (GES_IS_SOURCE (value) &&
ges_track_element_is_active (GES_TRACK_ELEMENT (value)))
return FALSE;
}
return TRUE;
}
/**
* ges_timeline_get_layer:
* @timeline: The #GESTimeline to 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;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
CHECK_THREAD (timeline);
for (tmp = timeline->layers; tmp; tmp = tmp->next) {
GESLayer *tmp_layer = GES_LAYER (tmp->data);
guint tmp_priority;
g_object_get (tmp_layer, "priority", &tmp_priority, NULL);
if (tmp_priority == priority) {
layer = gst_object_ref (tmp_layer);
break;
}
}
return layer;
}
/**
* ges_timeline_paste_element:
* @timeline: The #GESTimeline onto which 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);
CHECK_THREAD (timeline);
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);
CHECK_THREAD (timeline);
current_priority = ges_layer_get_priority (layer);
if (new_layer_priority == current_priority) {
GST_DEBUG_OBJECT (timeline,
"Nothing to do for %" GST_PTR_FORMAT ", same priorities", layer);
return TRUE;
}
timeline->layers = g_list_remove (timeline->layers, layer);
timeline->layers = g_list_insert (timeline->layers, layer,
(gint) new_layer_priority);
_resync_layers (timeline);
return TRUE;
}
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