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gstreamer/ges/ges-timeline.c
Thibault Saunier 0888e5e25b Rename object/tobj/trobj to clip or track_element as necessary 
Not really complete but it is a good start!
2013-02-15 16:26:30 -03:00

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
* 2012 Thibault Saunier <tsaunier@gnome.org>
* 2012 Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:ges-timeline
* @short_description: Multimedia timeline
*
* #GESTimeline is the central object for any multimedia timeline.
*
* Contains a list of #GESTimelineLayer 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
*/
#include "ges-internal.h"
#include "ges-project.h"
#include "ges-timeline.h"
#include "ges-track.h"
#include "ges-timeline-layer.h"
#include "ges-auto-transition.h"
#include "ges.h"
typedef struct _MoveContext MoveContext;
static GPtrArray *select_tracks_for_object_default (GESTimeline * timeline,
GESClip * clip, GESTrackElement * tr_obj, gpointer user_data);
static inline void init_movecontext (MoveContext * mv_ctx, gboolean first_init);
static void ges_extractable_interface_init (GESExtractableInterface * iface);
static void ges_meta_container_interface_init
(GESMetaContainerInterface * iface);
G_DEFINE_TYPE_WITH_CODE (GESTimeline, ges_timeline, GST_TYPE_BIN,
G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init)
G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER,
ges_meta_container_interface_init));
GST_DEBUG_CATEGORY_STATIC (ges_timeline_debug);
#undef GST_CAT_DEFAULT
#define GST_CAT_DEFAULT ges_timeline_debug
typedef struct TrackObjIters
{
GSequenceIter *iter_start;
GSequenceIter *iter_end;
GSequenceIter *iter_obj;
GSequenceIter *iter_by_layer;
GESTimelineLayer *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;
/* Ripple and Roll Objects */
GList *moving_trackelements;
/* We use it as a set of Clip to move between layers */
GHashTable *moving_clips;
/* Min priority of the objects currently in moving_clips */
guint min_move_layer;
/* Max priority of the objects currently in moving_clips */
guint max_layer_prio;
/* Never trim so duration would becomes < 0 */
guint64 max_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;
};
struct _GESTimelinePrivate
{
/* The duration of the timeline */
gint64 duration;
/* 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 */
GList *priv_tracks;
/* FIXME: We should definitly offer an API over this,
* probably through a ges_timeline_layer_get_track_elements () method */
GHashTable *by_layer; /* {layer: GSequence of TrackElement by start/priorities} */
/* The set of auto_transitions we control, currently the key is
* pointerToPreviousiTrackObjAdresspointerToNextTrackObjAdress as a string,
* ... not really optimal but it works */
GHashTable *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;
gboolean updates_enabled;
};
/* private structure to contain our track-related information */
typedef struct
{
GESTimeline *timeline;
GESTrack *track;
GstPad *pad; /* Pad from the track */
GstPad *ghostpad;
} TrackPrivate;
enum
{
PROP_0,
PROP_DURATION,
PROP_SNAPPING_DISTANCE,
PROP_UPDATE,
PROP_LAST
};
static GParamSpec *properties[PROP_LAST];
enum
{
TRACK_ADDED,
TRACK_REMOVED,
LAYER_ADDED,
LAYER_REMOVED,
SNAPING_STARTED,
SNAPING_ENDED,
SELECT_TRACKS_FOR_OBJECT,
LAST_SIGNAL
};
static GstBinClass *parent_class;
static guint ges_timeline_signals[LAST_SIGNAL] = { 0 };
static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track);
static guint nb_assets = 0;
/* GESExtractable implementation */
static gchar *
extractable_check_id (GType type, const gchar * id)
{
gchar *res;
if (id == NULL)
res = g_strdup_printf ("%s-%i", "project", nb_assets);
else
res = g_strdup (id);
nb_assets++;
return res;
}
static gchar *
extractable_get_id (GESExtractable * self)
{
GESAsset *asset;
if (!(asset = ges_extractable_get_asset (self)))
return NULL;
return g_strdup (ges_asset_get_id (asset));
}
static void
ges_extractable_interface_init (GESExtractableInterface * iface)
{
iface->asset_type = GES_TYPE_PROJECT;
iface->check_id = (GESExtractableCheckId) extractable_check_id;
iface->get_id = extractable_get_id;
}
static void
ges_meta_container_interface_init (GESMetaContainerInterface * iface)
{
}
/* GObject Standard vmethods*/
static void
ges_timeline_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GESTimeline *timeline = GES_TIMELINE (object);
switch (property_id) {
case PROP_DURATION:
g_value_set_uint64 (value, timeline->priv->duration);
break;
case PROP_SNAPPING_DISTANCE:
g_value_set_uint64 (value, timeline->priv->snapping_distance);
break;
case PROP_UPDATE:
g_value_set_boolean (value, ges_timeline_is_updating (timeline));
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_SNAPPING_DISTANCE:
timeline->priv->snapping_distance = g_value_get_uint64 (value);
break;
case PROP_UPDATE:
ges_timeline_enable_update (timeline, g_value_get_boolean (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;
while (tl->layers) {
GESTimelineLayer *layer = (GESTimelineLayer *) 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 gnlobjects have been destroyed.
*/
while (tl->tracks) {
ges_timeline_remove_track (GES_TIMELINE (object), tl->tracks->data);
}
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.moving_clips);
g_hash_table_unref (priv->auto_transitions);
G_OBJECT_CLASS (ges_timeline_parent_class)->dispose (object);
}
static void
ges_timeline_finalize (GObject * object)
{
G_OBJECT_CLASS (ges_timeline_parent_class)->finalize (object);
}
/* 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);
g_type_class_add_private (klass, sizeof (GESTimelinePrivate));
GST_DEBUG_CATEGORY_INIT (ges_timeline_debug, "gestimeline",
GST_DEBUG_FG_YELLOW, "ges timeline");
parent_class = g_type_class_peek_parent (klass);
object_class->get_property = ges_timeline_get_property;
object_class->set_property = ges_timeline_set_property;
object_class->dispose = ges_timeline_dispose;
object_class->finalize = ges_timeline_finalize;
/**
* 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: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:update:
*
* If %TRUE, then all modifications to objects within the timeline will
* cause a internal pipeline update (if required).
* If %FALSE, then only the timeline start/duration/stop properties
* will be updated, and the internal pipeline will only be updated when the
* property is set back to %TRUE.
*
* It is recommended to temporarily set this property to %FALSE before doing
* more than one modification in the timeline (like adding or moving
* several objects at once) in order to speed up the process, and then setting
* back the property to %TRUE when done.
*/
properties[PROP_UPDATE] = g_param_spec_boolean ("update", "Update",
"Update the internal pipeline on every modification", TRUE,
G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_UPDATE,
properties[PROP_UPDATE]);
/**
* 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 #GESTimelineLayer that was added to the timeline
*
* Will be emitted after the layer was 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_TIMELINE_LAYER);
/**
* GESTimeline::layer-removed:
* @timeline: the #GESTimeline
* @layer: the #GESTimelineLayer 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_TIMELINE_LAYER);
/**
* 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
*
* Since: 0.10.XX
*/
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
*
* Since: 0.10.XX
*/
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
*
* Since: 0.10.XX
*/
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);
}
static void
ges_timeline_init (GESTimeline * self)
{
GESTimelinePrivate *priv = self->priv;
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_TIMELINE, GESTimelinePrivate);
priv = self->priv;
self->layers = NULL;
self->tracks = NULL;
self->priv->duration = 0;
priv->snapping_distance = 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 (g_object_unref);
priv->auto_transitions =
g_hash_table_new_full (g_str_hash, g_str_equal, NULL, gst_object_unref);
priv->needs_transitions_update = TRUE;
priv->updates_enabled = TRUE;
g_signal_connect_after (self, "select-tracks-for-object",
G_CALLBACK (select_tracks_for_object_default), NULL);
}
/* Private methods */
/* Sorting utils*/
static gint
sort_layers (gpointer a, gpointer b)
{
GESTimelineLayer *layer_a, *layer_b;
guint prio_a, prio_b;
layer_a = GES_TIMELINE_LAYER (a);
layer_b = GES_TIMELINE_LAYER (b);
prio_a = ges_timeline_layer_get_priority (layer_a);
prio_b = ges_timeline_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
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))
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 (GESTimelineLayer * a, gpointer pprio)
{
gint prio = GPOINTER_TO_INT (pprio), lprio =
ges_timeline_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;
GESClip *transition = auto_transition->transition_clip;
GESTimelineLayer *layer = ges_clip_get_layer (transition);
ges_timeline_layer_remove_clip (layer, transition);
g_signal_handlers_disconnect_by_func (auto_transition,
_destroy_auto_transition_cb, timeline);
if (!g_hash_table_remove (priv->auto_transitions, auto_transition->key))
GST_WARNING_OBJECT (timeline, "Could not remove auto_transition %"
GST_PTR_FORMAT, auto_transition->key);
}
static GESAutoTransition *
create_transition (GESTimeline * timeline, GESTrackElement * previous,
GESTrackElement * next, GESClip * transition,
GESTimelineLayer * layer, guint64 start, guint64 duration)
{
GList *trackelements;
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_timeline_layer_add_asset (layer, asset, start, 0, duration, 1,
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 */
trackelements = ges_clip_get_track_elements (transition);
auto_transition =
ges_auto_transition_new (trackelements->data, previous, next);
g_list_free_full (trackelements, gst_object_unref);
g_signal_connect (auto_transition, "destroy-me",
G_CALLBACK (_destroy_auto_transition_cb), timeline);
g_hash_table_insert (timeline->priv->auto_transitions,
auto_transition->key, auto_transition);
return auto_transition;
}
typedef GESAutoTransition *(*GetAutoTransitionFunc) (GESTimeline * timeline,
GESTimelineLayer * layer, GESTrack * track, GESTrackElement * previous,
GESTrackElement * next, GstClockTime transition_duration);
static GESAutoTransition *
_find_transition_from_auto_transitions (GESTimeline * timeline,
GESTimelineLayer * layer, GESTrack * track, GESTrackElement * prev,
GESTrackElement * next, GstClockTime transition_duration)
{
GESAutoTransition *auto_transition;
gchar *key = g_strdup_printf ("%p%p", prev, next);
auto_transition = g_hash_table_lookup (timeline->priv->auto_transitions, key);
g_free (key);
return auto_transition;
}
static GESAutoTransition *
_create_auto_transition_from_transitions (GESTimeline * timeline,
GESTimelineLayer * 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_track_element_get_clip (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, GESTimelineLayer * layer,
GESTrack * track, GESTrackElement * initiating_obj,
GetAutoTransitionFunc get_auto_transition)
{
guint32 layer_prio;
GSequenceIter *iter;
GESAutoTransition *transition;
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_timeline_layer_get_auto_transition (layer))
return;
layer_prio = ges_timeline_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);
/* Only object that are in that layer and track */
if ((_PRIORITY (next) / LAYER_HEIGHT) != 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;
}
for (tmp = entered; tmp; tmp = tmp->next) {
gint64 transition_duration;
GESTrackElement *prev = tmp->data;
if (ctrack != ges_track_element_get_track (prev))
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)
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 */
static void
create_transitions (GESTimeline * timeline, GESTrackElement * track_element)
{
GESTrack *track;
GList *layer_node;
GESTimelinePrivate *priv = timeline->priv;
if (!priv->needs_transitions_update || !priv->updates_enabled)
return;
GST_DEBUG_OBJECT (timeline, "Creating transitions around %p", track_element);
track = ges_track_element_get_track (track_element);
layer_node = g_list_find_custom (timeline->layers,
GINT_TO_POINTER (_PRIORITY (track_element) / LAYER_HEIGHT),
(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->moving_clips = g_hash_table_new (g_direct_hash, g_direct_equal);
mv_ctx->moving_trackelements = NULL;
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;
}
static inline void
clean_movecontext (MoveContext * mv_ctx)
{
g_list_free (mv_ctx->moving_trackelements);
g_hash_table_remove_all (mv_ctx->moving_clips);
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 = _PRIORITY (trackelement) / LAYER_HEIGHT;
GList *layer_node = g_list_find_custom (timeline->layers,
GINT_TO_POINTER (layer_prio), (GCompareFunc) find_layer_by_prio);
GESTimelineLayer *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,
g_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);
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 guint64 *
ges_timeline_snap_position (GESTimeline * timeline,
GESTrackElement * trackelement, guint64 * current, guint64 timecode,
gboolean emit)
{
GESTimelinePrivate *priv = timeline->priv;
GSequenceIter *iter, *prev_iter, *nxt_iter;
GESTrackElement *tmp_trackelement;
GESClip *tmp_clip, *clip;
GstClockTime *last_snap_ts = priv->movecontext.last_snap_ts;
guint64 snap_distance = timeline->priv->snapping_distance;
guint64 *prev_tc, *next_tc, *ret = NULL, off = G_MAXUINT64, off1 =
G_MAXUINT64;
/* Avoid useless calculations */
if (snap_distance == 0)
return NULL;
/* If we can just resnap as last snap... do it */
if (last_snap_ts) {
off = timecode > *last_snap_ts ?
timecode - *last_snap_ts : *last_snap_ts - timecode;
if (off <= snap_distance) {
ret = last_snap_ts;
goto done;
}
}
clip = ges_track_element_get_clip (trackelement);
iter = g_sequence_search (priv->starts_ends, &timecode,
(GCompareDataFunc) compare_uint64, NULL);
/* Getting the next/previous values, and use the closest one if any "respects"
* the snap_distance value */
nxt_iter = iter;
while (!g_sequence_iter_is_end (nxt_iter)) {
next_tc = g_sequence_get (iter);
tmp_trackelement = g_hash_table_lookup (timeline->priv->by_object, next_tc);
tmp_clip = ges_track_element_get_clip (tmp_trackelement);
off = timecode > *next_tc ? timecode - *next_tc : *next_tc - timecode;
if (next_tc != current && off <= snap_distance && clip != tmp_clip) {
ret = next_tc;
break;
}
nxt_iter = g_sequence_iter_next (nxt_iter);
}
if (ret == NULL)
off = G_MAXUINT64;
prev_iter = g_sequence_iter_prev (iter);
while (!g_sequence_iter_is_begin (prev_iter)) {
prev_tc = g_sequence_get (prev_iter);
tmp_trackelement = g_hash_table_lookup (timeline->priv->by_object, prev_tc);
tmp_clip = ges_track_element_get_clip (tmp_trackelement);
off1 = timecode > *prev_tc ? timecode - *prev_tc : *prev_tc - timecode;
if (prev_tc != current && off1 < off && off1 <= snap_distance &&
clip != tmp_clip) {
ret = prev_tc;
break;
}
prev_iter = g_sequence_iter_prev (prev_iter);
}
done:
/* 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;
ges_timeline_emit_snappig (timeline, trackelement, ret);
GST_DEBUG_OBJECT (timeline, "Snaping at %" GST_TIME_FORMAT,
GST_TIME_ARGS (snap_time));
}
return ret;
}
static inline GESClip *
add_moving_clip (MoveContext * mv_ctx, GESTrackElement * trackelement)
{
GESClip *clip;
GESTimelineLayer *layer;
guint layer_prio;
clip = ges_track_element_get_clip (trackelement);
/* Avoid recalculating */
if (!g_hash_table_lookup (mv_ctx->moving_clips, clip)) {
layer = ges_clip_get_layer (clip);
if (layer == NULL) {
GST_WARNING_OBJECT (clip, "Not in any layer, can not move"
" between layers");
} else {
g_hash_table_insert (mv_ctx->moving_clips, clip, clip);
layer_prio = ges_timeline_layer_get_priority (layer);
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);
g_object_unref (layer);
}
}
return clip;
}
static gboolean
ges_move_context_set_objects (GESTimeline * timeline, GESTrackElement * obj,
GESEdge edge)
{
TrackObjIters *iters;
GESTrackElement *tmptrackelement;
guint64 start, end, tmpend;
GSequenceIter *iter, *trackelement_iter;
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;
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) {
mv_ctx->max_trim_pos =
MAX (mv_ctx->max_trim_pos, _START (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:
case GES_EDGE_NONE: /* In this case only works for ripple */
end = _START (obj) + _DURATION (obj);
mv_ctx->max_trim_pos = G_MAXUINT64;
/* Look for folowing objects */
for (iter = g_sequence_iter_next (trackelement_iter);
iter && !g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter)) {
tmptrackelement = GES_TRACK_ELEMENT (g_sequence_get (iter));
if (_START (tmptrackelement) >= end) {
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_track_element_get_clip (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);
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 = clip->trackelements; 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_moving_clip (&timeline->priv->movecontext, editor_trackelement);
} else {
/* We add the main object to the moving_clips set */
add_moving_clip (&timeline->priv->movecontext, obj);
}
return TRUE;
}
gboolean
ges_timeline_trim_object_simple (GESTimeline * timeline, GESTrackElement * obj,
GList * layers, GESEdge edge, guint64 position, gboolean snapping)
{
guint64 nstart, start, inpoint, duration, max_duration, *snapped, *cur;
gboolean ret = TRUE;
gint64 real_dur;
GST_DEBUG_OBJECT (obj, "Trimming to %" GST_TIME_FORMAT " %s snaping, edge %i",
GST_TIME_ARGS (position), snapping ? "Is" : "Not", edge);
start = _START (obj);
g_object_get (obj, "max-duration", &max_duration, NULL);
switch (edge) {
case GES_EDGE_START:
inpoint = _INPOINT (obj);
duration = _DURATION (obj);
if (snapping) {
cur = g_hash_table_lookup (timeline->priv->by_start, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position,
TRUE);
if (snapped)
position = *snapped;
}
nstart = position;
/* Calculate new values */
position = MAX (start > inpoint ? start - inpoint : 0, position);
position = MIN (position, start + duration);
inpoint = MAX (0, inpoint + position - start);
real_dur = start + duration - nstart;
/* FIXME: Why CLAMP (0, real_dur, max_duration) doesn't work? */
duration = MAX (0, real_dur);
duration = MIN (duration, max_duration - _INPOINT (obj));
timeline->priv->needs_transitions_update = FALSE;
_set_start0 (GES_TIMELINE_ELEMENT (obj), nstart);
_set_inpoint0 (GES_TIMELINE_ELEMENT (obj), inpoint);
timeline->priv->needs_transitions_update = TRUE;
_set_duration0 (GES_TIMELINE_ELEMENT (obj), duration);
break;
case GES_EDGE_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;
/* Calculate new values */
real_dur = position - start;
duration = MAX (0, real_dur);
duration = MIN (duration, max_duration - _INPOINT (obj));
_set_duration0 (GES_TIMELINE_ELEMENT (obj), 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;
GESClip *clip;
guint64 duration, new_start, *snapped, *cur;
gint64 offset;
MoveContext *mv_ctx = &timeline->priv->movecontext;
mv_ctx->ignore_needs_ctx = TRUE;
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;
clip = add_moving_clip (mv_ctx, trackelement);
if (ges_track_element_is_locked (trackelement) == TRUE) {
/* Make sure not to move 2 times the same Clip */
if (g_list_find (moved_clips, clip) == NULL) {
_set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start);
moved_clips = g_list_prepend (moved_clips, clip);
}
} else {
_set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start);
}
}
g_list_free (moved_clips);
_set_start0 (GES_TIMELINE_ELEMENT (obj), position);
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);
_set_duration0 (GES_TIMELINE_ELEMENT (obj), position - _START (obj));
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;
clip = add_moving_clip (mv_ctx, trackelement);
if (ges_track_element_is_locked (trackelement) == TRUE) {
/* Make sure not to move 2 times the same Clip */
if (g_list_find (moved_clips, clip) == NULL) {
_set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start);
moved_clips = g_list_prepend (moved_clips, clip);
}
} else {
_set_start0 (GES_TIMELINE_ELEMENT (trackelement), new_start);
}
}
g_list_free (moved_clips);
timeline->priv->needs_transitions_update = TRUE;
GST_DEBUG ("Done Rippling end");
break;
case GES_EDGE_START:
GST_WARNING ("Ripple start doesn't exist!");
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;
MoveContext *mv_ctx = &timeline->priv->movecontext;
mv_ctx->ignore_needs_ctx = TRUE;
if (!ges_timeline_set_moving_context (timeline, object, GES_EDIT_MODE_TRIM,
edge, layers))
goto end;
ret =
ges_timeline_trim_object_simple (timeline, object, layers, edge, position,
TRUE);
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)
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, obj, layers,
GES_EDGE_START, position, 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) {
GESTrackElement *tmptrackelement = GES_TRACK_ELEMENT (tmp->data);
tmpstart = _START (tmptrackelement);
tmpduration = _DURATION (tmptrackelement);
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, tmptrackelement, 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, obj, NULL, GES_EDGE_END,
position, FALSE);
/* 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) {
GESTrackElement *tmptrackelement = GES_TRACK_ELEMENT (tmp->data);
tmpstart = _START (tmptrackelement);
tmpduration = _DURATION (tmptrackelement);
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, tmptrackelement, 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_RIPPLE,
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, object, layers, edge,
position);
}
gboolean
ges_timeline_move_object_simple (GESTimeline * timeline,
GESTrackElement * object, GList * layers, GESEdge edge, guint64 position)
{
guint64 *snap_end, *snap_st, *cur, off1, off2, end;
end = position + _DURATION (object);
cur = g_hash_table_lookup (timeline->priv->by_end, object);
GST_DEBUG_OBJECT (timeline, "Moving to %" GST_TIME_FORMAT " (end %"
GST_TIME_FORMAT ")", GST_TIME_ARGS (position), GST_TIME_ARGS (end));
snap_end = ges_timeline_snap_position (timeline, object, cur, end, FALSE);
if (snap_end)
off1 = end > *snap_end ? end - *snap_end : *snap_end - end;
else
off1 = G_MAXUINT64;
cur = g_hash_table_lookup (timeline->priv->by_start, object);
snap_st = ges_timeline_snap_position (timeline, object, 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 - end;
ges_timeline_emit_snappig (timeline, object, snap_end);
} else if (snap_st) {
position = position + *snap_st - position;
ges_timeline_emit_snappig (timeline, object, snap_st);
} else
ges_timeline_emit_snappig (timeline, object, NULL);
_set_start0 (GES_TIMELINE_ELEMENT (object), position);
return TRUE;
}
gboolean
timeline_context_to_layer (GESTimeline * timeline, gint offset)
{
gboolean ret = TRUE;
MoveContext *mv_ctx = &timeline->priv->movecontext;
/* Layer's priority is always positive */
if (offset != 0 && (offset > 0 || mv_ctx->min_move_layer >= -offset)) {
GHashTableIter iter;
GESClip *key, *value;
GESTimelineLayer *new_layer, *layer;
guint prio;
mv_ctx->ignore_needs_ctx = TRUE;
GST_DEBUG ("Moving %d object, offset %d",
g_hash_table_size (mv_ctx->moving_clips), offset);
g_hash_table_iter_init (&iter, mv_ctx->moving_clips);
while (g_hash_table_iter_next (&iter, (gpointer *) & key,
(gpointer *) & value)) {
layer = ges_clip_get_layer (value);
prio = ges_timeline_layer_get_priority (layer);
/* We know that the layer exists as we created it */
new_layer = GES_TIMELINE_LAYER (g_list_nth_data (timeline->layers,
prio + offset));
if (new_layer == NULL) {
do {
new_layer = ges_timeline_append_layer (timeline);
} while (ges_timeline_layer_get_priority (new_layer) < prio + offset);
}
ret &= ges_clip_move_to_layer (key, new_layer);
g_object_unref (layer);
}
/* Readjust min_move_layer */
mv_ctx->min_move_layer = mv_ctx->min_move_layer + offset;
mv_ctx->ignore_needs_ctx = FALSE;
}
return ret;
}
static void
add_object_to_track (GESClip * clip, GESTrackElement * track_element,
GESTrack * track)
{
if (!ges_clip_add_track_element (clip, track_element)) {
GST_WARNING_OBJECT (clip, "Failed to add track element to clip");
gst_object_unref (track_element);
return;
}
if (!ges_track_add_element (track, track_element)) {
GST_WARNING_OBJECT (clip, "Failed to add track element to track");
ges_clip_release_track_element (clip, track_element);
gst_object_unref (track_element);
return;
}
}
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;
GPtrArray *tracks = NULL;
GESTrackType types, visited_type = GES_TRACK_TYPE_UNKNOWN;
GList *tmp, *l, *track_elements;
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;
track_elements = ges_clip_create_track_elements (clip, track->type);
for (l = track_elements; l; l = l->next) {
GESTrack *tmp_track;
GESTrackElement *track_element = l->data;
GST_DEBUG_OBJECT (timeline, "Got trackelement: %" GST_PTR_FORMAT
"Asking to which track it should be added", track_element);
g_signal_emit (G_OBJECT (timeline),
ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT], 0, clip,
track_element, &tracks);
if (!tracks || tracks->len == 0) {
GST_DEBUG_OBJECT (timeline, "Got no Track to add %p (type %s)",
track_element,
ges_track_type_name (ges_track_element_get_track_type
(track_element)));
goto next_track_element;
}
for (i = 0; i < tracks->len; i++) {
GESTrackElement *track_element_copy;
tmp_track = g_ptr_array_index (tracks, i);
if (track && tmp_track != track) {
GST_LOG_OBJECT (timeline,
"Not adding %" GST_PTR_FORMAT " to any track", track_element);
continue;
}
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, tmp_track);
add_object_to_track (clip, track_element_copy, tmp_track);
gst_object_unref (tmp_track);
}
next_track_element:
if (tracks) {
g_ptr_array_unref (tracks);
tracks = NULL;
}
gst_object_unref (track_element);
}
}
}
static void
layer_auto_transition_changed_cb (GESTimelineLayer * layer,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
_create_transitions_on_layer (timeline, layer, NULL, NULL,
_create_auto_transition_from_transitions);
}
static void
layer_object_added_cb (GESTimelineLayer * layer, GESClip * clip,
GESTimeline * timeline)
{
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);
timeline->priv->movecontext.needs_move_ctx = TRUE;
_create_transitions_on_layer (timeline, layer, NULL, NULL,
_find_transition_from_auto_transitions);
return;
}
GST_DEBUG ("New Clip %p added to layer %p", clip, layer);
add_object_to_tracks (timeline, clip, NULL);
GST_DEBUG ("Done");
}
static void
layer_priority_changed_cb (GESTimelineLayer * layer,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
timeline->layers = g_list_sort (timeline->layers, (GCompareFunc)
sort_layers);
}
static void
layer_object_removed_cb (GESTimelineLayer * 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_clip_get_track_elements (clip);
for (tmp = trackelements; tmp; tmp = tmp->next) {
GESTrackElement *track_element = (GESTrackElement *) tmp->data;
GST_DEBUG_OBJECT (timeline, "Trying to remove TrackElement %p",
track_element);
if (G_LIKELY (g_list_find_custom (timeline->priv->priv_tracks,
ges_track_element_get_track (track_element),
(GCompareFunc) custom_find_track))) {
GST_DEBUG ("Belongs to one of the tracks we control");
ges_track_remove_element (ges_track_element_get_track (track_element),
track_element);
ges_clip_release_track_element (clip, track_element);
}
/* removing the reference added by _get_track_elements() */
g_object_unref (track_element);
}
g_list_free (trackelements);
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;
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 (_PRIORITY (child) / LAYER_HEIGHT),
(GCompareFunc) find_layer_by_prio);
GESTimelineLayer *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");
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);
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;
}
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, NULL);
g_signal_handlers_disconnect_by_func (track_element,
trackelement_duration_changed_cb, NULL);
g_signal_handlers_disconnect_by_func (track_element,
trackelement_priority_changed_cb, NULL);
stop_tracking_track_element (timeline, track_element);
}
static void
pad_added_cb (GESTrack * track, GstPad * pad, TrackPrivate * tr_priv)
{
gchar *padname;
gboolean no_more;
GList *tmp;
GST_DEBUG ("track:%p, pad:%s:%s", track, GST_DEBUG_PAD_NAME (pad));
if (G_UNLIKELY (tr_priv->pad)) {
GST_WARNING ("We are already controlling a pad for this track");
return;
}
/* Remember the pad */
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));
}
}
static void
pad_removed_cb (GESTrack * track, GstPad * pad, TrackPrivate * tr_priv)
{
GST_DEBUG ("track:%p, pad:%s:%s", track, GST_DEBUG_PAD_NAME (pad));
if (G_UNLIKELY (tr_priv->pad != pad)) {
GST_WARNING ("Not the pad we're controlling");
return;
}
if (G_UNLIKELY (tr_priv->ghostpad == NULL)) {
GST_WARNING ("We don't have a ghostpad for this pad !");
return;
}
GST_DEBUG ("Removing ghostpad");
gst_pad_set_active (tr_priv->ghostpad, FALSE);
gst_element_remove_pad (GST_ELEMENT (tr_priv->timeline), tr_priv->ghostpad);
tr_priv->ghostpad = NULL;
tr_priv->pad = NULL;
}
/**** API *****/
/**
* ges_timeline_new:
*
* Creates a new empty #GESTimeline.
*
* Returns: The new timeline.
*/
GESTimeline *
ges_timeline_new (void)
{
return g_object_new (GES_TYPE_TIMELINE, NULL);
}
/**
* 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: 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 (ret);
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)
{
gboolean ret, created_proj;
GESProject *project;
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_append_layer:
* @timeline: a #GESTimeline
*
* Append a newly created #GESTimelineLayer to @timeline
* Note that you do not own any reference to the returned layer.
*
* Returns: (transfer none): The newly created #GESTimelineLayer, or the last (empty)
* #GESTimelineLayer of @timeline.
*/
GESTimelineLayer *
ges_timeline_append_layer (GESTimeline * timeline)
{
guint32 priority;
GESTimelineLayer *layer;
layer = ges_timeline_layer_new ();
priority = g_list_length (timeline->layers);
ges_timeline_layer_set_priority (layer, priority);
ges_timeline_add_layer (timeline, layer);
return layer;
}
/**
* ges_timeline_add_layer:
* @timeline: a #GESTimeline
* @layer: the #GESTimelineLayer 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, GESTimelineLayer * layer)
{
GList *objects, *tmp;
GST_DEBUG ("timeline:%p, layer:%p", timeline, layer);
/* We can only add a layer that doesn't already belong to another timeline */
if (G_UNLIKELY (layer->timeline)) {
GST_WARNING ("Layer belongs to another timeline, can't add it");
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");
return FALSE;
}
g_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_timeline_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 (layer, "clip-added", G_CALLBACK (layer_object_added_cb),
timeline);
g_signal_connect (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_timeline_layer_get_clips (layer);
for (tmp = objects; tmp; tmp = tmp->next) {
layer_object_added_cb (layer, tmp->data, timeline);
g_object_unref (tmp->data);
tmp->data = NULL;
}
g_list_free (objects);
return TRUE;
}
/**
* ges_timeline_remove_layer:
* @timeline: a #GESTimeline
* @layer: the #GESTimelineLayer 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, GESTimelineLayer * layer)
{
GList *layer_objects, *tmp;
GST_DEBUG ("timeline:%p, layer:%p", timeline, layer);
if (G_UNLIKELY (!g_list_find (timeline->layers, layer))) {
GST_WARNING ("Layer doesn't belong to this timeline");
return FALSE;
}
/* remove objects from any private data structures */
layer_objects = ges_timeline_layer_get_clips (layer);
for (tmp = layer_objects; tmp; tmp = tmp->next) {
layer_object_removed_cb (layer, GES_CLIP (tmp->data), timeline);
g_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_timeline_layer_set_timeline (layer, NULL);
g_signal_emit (timeline, ges_timeline_signals[LAYER_REMOVED], 0, layer);
g_object_unref (layer);
return TRUE;
}
/**
* ges_timeline_add_track:
* @timeline: a #GESTimeline
* @track: the #GESTrack to add
*
* Add a track to the timeline. The reference to the track will be stolen by the
* pipeline.
*
* Returns: TRUE if the track was properly added, else FALSE.
*/
/* FIXME: create track elements for clips which have already been
* added to existing layers.
*/
gboolean
ges_timeline_add_track (GESTimeline * timeline, GESTrack * track)
{
TrackPrivate *tr_priv;
GList *tmp;
GST_DEBUG ("timeline:%p, track:%p", timeline, track);
/* make sure we don't already control it */
if (G_UNLIKELY (g_list_find (timeline->tracks, (gconstpointer) track))) {
GST_WARNING ("Track is already controlled by this timeline");
return FALSE;
}
/* Add the track to ourself (as a GstBin)
* Reference is stolen ! */
if (G_UNLIKELY (!gst_bin_add (GST_BIN (timeline), GST_ELEMENT (track)))) {
GST_WARNING ("Couldn't add track to ourself (GST)");
return FALSE;
}
tr_priv = g_new0 (TrackPrivate, 1);
tr_priv->timeline = timeline;
tr_priv->track = track;
/* Add the track to the list of tracks we track */
timeline->priv->priv_tracks = g_list_append (timeline->priv->priv_tracks,
tr_priv);
timeline->tracks = g_list_append (timeline->tracks, track);
/* Listen to pad-added/-removed */
g_signal_connect (track, "pad-added", (GCallback) pad_added_cb, tr_priv);
g_signal_connect (track, "pad-removed", (GCallback) pad_removed_cb, tr_priv);
/* 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");
/* 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_timeline_layer_get_clips (tmp->data);
for (obj = objects; obj; obj = obj->next) {
GESClip *clip = obj->data;
add_object_to_tracks (timeline, clip, track);
g_object_unref (clip);
}
g_list_free (objects);
}
return TRUE;
}
/**
* ges_timeline_remove_track:
* @timeline: a #GESTimeline
* @track: the #GESTrack to remove
*
* Remove the @track from the @timeline. The reference stolen when adding the
* @track will be removed. If you wish to use the @track after calling this
* function you must ensure that you have a reference to it.
*
* Returns: TRUE if the @track was properly removed, else FALSE.
*/
/* FIXME: release any track elements associated with this layer. currenly this
* will not happen if you remove the track before removing *all*
* clips which have a track element in this track.
*/
gboolean
ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track)
{
GList *tmp;
TrackPrivate *tr_priv;
GESTimelinePrivate *priv;
g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
GST_DEBUG ("timeline:%p, track:%p", timeline, track);
priv = timeline->priv;
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");
return FALSE;
}
tr_priv = tmp->data;
priv->priv_tracks = g_list_remove (priv->priv_tracks, tr_priv);
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, pad_added_cb, tr_priv);
g_signal_handlers_disconnect_by_func (track, pad_removed_cb, tr_priv);
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): 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;
for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
if (pad == tr_priv->ghostpad)
return tr_priv->track;
}
return NULL;
}
/**
* ges_timeline_get_tracks:
* @timeline: a #GESTimeline
*
* Returns the list of #GESTrack used by the Timeline.
*
* Returns: (transfer full) (element-type GESTrack): A list of #GESTrack.
* The caller should unref each track once he is done with them.
*/
GList *
ges_timeline_get_tracks (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL);
return g_list_copy_deep (timeline->tracks, (GCopyFunc) gst_object_ref, NULL);
}
/**
* ges_timeline_get_layers:
* @timeline: a #GESTimeline
*
* Get the list of #GESTimelineLayer present in the Timeline.
*
* Returns: (transfer full) (element-type GESTimelineLayer): the list of
* #GESTimelineLayer present in the Timeline sorted by priority.
* The caller should unref each Layer once he is done with them.
*/
GList *
ges_timeline_get_layers (GESTimeline * timeline)
{
GList *tmp, *res = NULL;
for (tmp = timeline->layers; tmp; tmp = g_list_next (tmp)) {
res = g_list_insert_sorted (res, g_object_ref (tmp->data),
(GCompareFunc) sort_layers);
}
return res;
}
/**
* ges_timeline_is_updating:
* @timeline: a #GESTimeline
*
* Get whether the timeline is updated for every change happening within or not.
*
* Returns: %TRUE if @timeline is updating on every changes, else %FALSE.
*/
gboolean
ges_timeline_is_updating (GESTimeline * timeline)
{
GList *tmp;
g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE);
for (tmp = timeline->tracks; tmp; tmp = tmp->next) {
if (!ges_track_is_updating (GES_TRACK (tmp->data)))
return FALSE;
}
return TRUE;
}
/**
* ges_timeline_enable_update:
* @timeline: a #GESTimeline
* @enabled: Whether the timeline should update on every change or not.
*
* Control whether the timeline is updated for every change happening within.
*
* Users will want to use this method with %FALSE before doing lots of changes,
* and then call again with %TRUE for the changes to take effect in one go.
*
* Returns: %TRUE if the update status could be changed, else %FALSE.
*/
gboolean
ges_timeline_enable_update (GESTimeline * timeline, gboolean enabled)
{
GList *tmp;
gboolean res = TRUE;
GST_DEBUG_OBJECT (timeline, "%s updates", enabled ? "Enabling" : "Disabling");
for (tmp = timeline->tracks; tmp; tmp = tmp->next) {
if (!ges_track_enable_update (GES_TRACK (tmp->data), enabled))
res = FALSE;
}
/* Make sure we reset the context */
timeline->priv->movecontext.needs_move_ctx = TRUE;
timeline->priv->updates_enabled = enabled;
for (tmp = timeline->layers; tmp; tmp = tmp->next) {
_create_transitions_on_layer (timeline, GES_TIMELINE_LAYER (tmp->data),
NULL, NULL, _find_transition_from_auto_transitions);
}
if (res)
g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_UPDATE]);
return res;
}
/**
* ges_timeline_get_duration:
* @timeline: a #GESTimeline
*
* Get the current duration of @timeline
*
* Returns: The current duration of @timeline
*/
GstClockTime
ges_timeline_get_duration (GESTimeline * timeline)
{
g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE);
return timeline->priv->duration;
}
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