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gstreamer/ges/ges-timeline.c
Thibault Saunier 91b55adec2 timeline: Minor documentations fixes
2012-04-23 22:03:11 -04:00

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/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, 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 timeline objects 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
* to specify the format to save/load the timeline from, please consult the
* documentation about #GESFormatter.
*/
#include "gesmarshal.h"
#include "ges-internal.h"
#include "ges-timeline.h"
#include "ges-track.h"
#include "ges-timeline-layer.h"
#include "ges.h"
typedef struct _MoveContext MoveContext;
static inline void init_movecontext (MoveContext * mv_ctx);
G_DEFINE_TYPE (GESTimeline, ges_timeline, GST_TYPE_BIN);
#define GES_TIMELINE_PENDINGOBJS_GET_LOCK(timeline) \
(GES_TIMELINE(timeline)->priv->pendingobjects_lock)
#define GES_TIMELINE_PENDINGOBJS_LOCK(timeline) \
(g_mutex_lock(GES_TIMELINE_PENDINGOBJS_GET_LOCK (timeline)))
#define GES_TIMELINE_PENDINGOBJS_UNLOCK(timeline) \
(g_mutex_unlock(GES_TIMELINE_PENDINGOBJS_GET_LOCK (timeline)))
/**
* 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
{
GESTimelineObject *obj;
GESEdge edge;
GESEditMode mode;
/* Ripple and Roll Objects */
GList *moving_tckobjs;
/* We use it as a set of TimelineObject to move between layers */
GHashTable *moving_tlobjs;
/* Min priority of the objects currently in moving_tlobjs */
guint min_move_layer;
/* Max priority of the objects currently in moving_tlobjs */
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 objects
* properties so we don't end up always needing new move context */
gboolean ignore_needs_ctx;
gboolean needs_move_ctx;
};
struct _GESTimelinePrivate
{
GList *layers; /* A list of GESTimelineLayer sorted by priority */
GList *tracks; /* A list of private track data */
/* The duration of the timeline */
gint64 duration;
/* discoverer used for virgin sources */
GstDiscoverer *discoverer;
GList *pendingobjects;
/* lock to avoid discovery of objects that will be removed */
GMutex *pendingobjects_lock;
/* Whether we are changing state asynchronously or not */
gboolean async_pending;
/* 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 TrackSource also
* be tracked? */
/* Snapping fields */
GHashTable *by_start; /* {TrackSource: start} */
GHashTable *by_end; /* {TrackSource: end} */
GHashTable *by_object; /* {timecode: TrackSource} */
GSequence *starts_ends; /* Sorted list of starts/ends */
/* We keep 1 reference to our trackobject here */
GSequence *tracksources; /* TrackSource-s sorted by start/priorities */
MoveContext movecontext;
};
/* 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_LAST
};
static GParamSpec *properties[PROP_LAST];
enum
{
TRACK_ADDED,
TRACK_REMOVED,
LAYER_ADDED,
LAYER_REMOVED,
DISCOVERY_ERROR,
OBJECT_SNAPPING,
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 GstStateChangeReturn
ges_timeline_change_state (GstElement * element, GstStateChange transition);
static void
discoverer_finished_cb (GstDiscoverer * discoverer, GESTimeline * timeline);
static void
discoverer_discovered_cb (GstDiscoverer * discoverer,
GstDiscovererInfo * info, GError * err, GESTimeline * timeline);
/* 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) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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;
}
}
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;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_timeline_dispose (GObject * object)
{
GESTimelinePrivate *priv = GES_TIMELINE (object)->priv;
if (priv->discoverer) {
gst_discoverer_stop (priv->discoverer);
g_object_unref (priv->discoverer);
priv->discoverer = NULL;
}
while (priv->layers) {
GESTimelineLayer *layer = (GESTimelineLayer *) priv->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 (priv->tracks) {
TrackPrivate *tr_priv = (TrackPrivate *) priv->tracks->data;
ges_timeline_remove_track (GES_TIMELINE (object), tr_priv->track);
}
g_hash_table_unref (priv->by_start);
g_hash_table_unref (priv->by_end);
g_hash_table_unref (priv->by_object);
g_sequence_free (priv->starts_ends);
g_sequence_free (priv->tracksources);
G_OBJECT_CLASS (ges_timeline_parent_class)->dispose (object);
}
static void
ges_timeline_finalize (GObject * object)
{
GESTimeline *timeline = GES_TIMELINE (object);
g_mutex_free (timeline->priv->pendingobjects_lock);
G_OBJECT_CLASS (ges_timeline_parent_class)->finalize (object);
}
static void
ges_timeline_class_init (GESTimelineClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
g_type_class_add_private (klass, sizeof (GESTimelinePrivate));
parent_class = g_type_class_peek_parent (klass);
element_class->change_state = ges_timeline_change_state;
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::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, ges_marshal_VOID__OBJECT, 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, ges_marshal_VOID__OBJECT, 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, ges_marshal_VOID__OBJECT, 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, ges_marshal_VOID__OBJECT, G_TYPE_NONE, 1,
GES_TYPE_TIMELINE_LAYER);
/**
* GESTimeline::discovery-error:
* @timeline: the #GESTimeline
* @formatter: the #GESFormatter
* @source: The #GESTimelineFileSource that could not be discovered properly
* @error: (type GLib.Error): #GError, which will be non-NULL if an error
* occurred during discovery
*/
ges_timeline_signals[DISCOVERY_ERROR] =
g_signal_new ("discovery-error", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST, 0, NULL, NULL, gst_marshal_VOID__OBJECT_BOXED,
G_TYPE_NONE, 2, GES_TYPE_TIMELINE_FILE_SOURCE, GST_TYPE_G_ERROR);
/**
* GESTimeline::track-objects-snapping:
* @timeline: the #GESTimeline
* @obj1: the first #GESTrackObject that was snapping.
* @obj2: the second #GESTrackObject that was snapping.
* @position: the position where the two objects finally snapping.
*
* Will be emitted after two track objects snapped together.
*
* Since: 0.10.XX
*/
ges_timeline_signals[OBJECT_SNAPPING] =
g_signal_new ("track-objects-snapping", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, ges_marshal_VOID__OBJECT,
G_TYPE_NONE, 3, GES_TYPE_TRACK_OBJECT, GES_TYPE_TRACK_OBJECT,
G_TYPE_UINT64);
}
static void
ges_timeline_init (GESTimeline * self)
{
GESTimelinePrivate *priv;
self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_TIMELINE, GESTimelinePrivate);
priv = self->priv;
priv->layers = NULL;
priv->tracks = NULL;
priv->duration = 0;
priv->snapping_distance = 0;
/* Move context initialization */
init_movecontext (&self->priv->movecontext);
priv->movecontext.ignore_needs_ctx = FALSE;
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->starts_ends = g_sequence_new (g_free);
priv->tracksources = g_sequence_new (g_object_unref);
priv->pendingobjects_lock = g_mutex_new ();
/* New discoverer with a 15s timeout */
priv->discoverer = gst_discoverer_new (15 * GST_SECOND, NULL);
g_signal_connect (priv->discoverer, "finished",
G_CALLBACK (discoverer_finished_cb), self);
g_signal_connect (priv->discoverer, "discovered",
G_CALLBACK (discoverer_discovered_cb), self);
gst_discoverer_start (priv->discoverer);
}
/* 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 gint
objects_start_compare (GESTrackObject * a, GESTrackObject * b)
{
if (a->start == b->start) {
if (a->priority < b->priority)
return -1;
if (a->priority > b->priority)
return 1;
return 0;
}
if (a->start < b->start)
return -1;
if (a->start > b->start)
return 1;
return 0;
}
static inline void
sort_track_objects (GESTimeline * timeline)
{
g_sequence_sort (timeline->priv->tracksources,
(GCompareDataFunc) objects_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;
}
/* Look for the pointer passed as @value */
static GSequenceIter *
lookup_pointer_uint (GSequence * seq, guint64 * value)
{
GSequenceIter *iter, *tmpiter;
guint64 *found, *tmpval;
iter = g_sequence_lookup (seq, value,
(GCompareDataFunc) compare_uint64, NULL);
found = g_sequence_get (iter);
/* We have the same pointer so we are all fine */
if (found == value)
return iter;
if (!g_sequence_iter_is_end (iter)) {
/* Looking frontward for the good pointer */
tmpiter = iter;
while ((tmpiter = g_sequence_iter_next (tmpiter))) {
if (g_sequence_iter_is_end (tmpiter))
break;
tmpval = g_sequence_get (tmpiter);
if (tmpval == value)
return tmpiter;
else if (*tmpval != *value)
break;
}
}
if (!g_sequence_iter_is_begin (iter)) {
/* Looking backward for the good pointer */
tmpiter = iter;
while ((tmpiter = g_sequence_iter_prev (tmpiter))) {
tmpval = g_sequence_get (tmpiter);
if (tmpval == value)
return tmpiter;
else if (*tmpval != *value || g_sequence_iter_is_begin (tmpiter))
break;
}
}
GST_ERROR ("Missing timecode %p %" GST_TIME_FORMAT
" this should never happen", value, GST_TIME_ARGS (*value));
return NULL;
}
static inline void
sort_starts_ends_end (GESTimeline * timeline, GESTrackObject * obj)
{
GSequenceIter *iter;
GESTimelinePrivate *priv = timeline->priv;
guint64 *end = g_hash_table_lookup (priv->by_end, obj);
iter = lookup_pointer_uint (priv->starts_ends, end);
*end = obj->start + obj->duration;
g_sequence_sort_changed (iter, (GCompareDataFunc) compare_uint64, NULL);
}
static inline void
sort_starts_ends_start (GESTimeline * timeline, GESTrackObject * obj)
{
GSequenceIter *iter;
GESTimelinePrivate *priv = timeline->priv;
guint64 *start = g_hash_table_lookup (priv->by_start, obj);
iter = lookup_pointer_uint (priv->starts_ends, start);
*start = obj->start;
g_sequence_sort_changed (iter, (GCompareDataFunc) compare_uint64, NULL);
}
static inline void
resort_all_starts_ends (GESTimeline * timeline)
{
GSequenceIter *iter;
GESTrackObject *tckobj;
guint64 *start, *end;
GESTimelinePrivate *priv = timeline->priv;
for (iter = g_sequence_get_begin_iter (priv->tracksources);
!g_sequence_iter_is_end (iter); iter = g_sequence_iter_next (iter)) {
tckobj = GES_TRACK_OBJECT (g_sequence_get (iter));
start = g_hash_table_lookup (priv->by_start, tckobj);
end = g_hash_table_lookup (priv->by_end, tckobj);
*start = tckobj->start;
*end = tckobj->start + tckobj->duration;
}
g_sequence_sort (priv->starts_ends, (GCompareDataFunc) compare_uint64, NULL);
}
static inline void
sort_all (GESTimeline * timeline)
{
sort_track_objects (timeline);
resort_all_starts_ends (timeline);
}
/* Timeline edition functions */
static inline void
init_movecontext (MoveContext * mv_ctx)
{
mv_ctx->moving_tckobjs = NULL;
mv_ctx->moving_tlobjs = g_hash_table_new (g_direct_hash, g_direct_equal);
mv_ctx->max_trim_pos = G_MAXUINT64;
mv_ctx->min_move_layer = G_MAXUINT;
mv_ctx->max_layer_prio = 0;
}
static inline void
clean_movecontext (MoveContext * mv_ctx)
{
g_list_free (mv_ctx->moving_tckobjs);
g_hash_table_unref (mv_ctx->moving_tlobjs);
init_movecontext (mv_ctx);
}
static void
stop_tracking_for_snapping (GESTimeline * timeline, GESTrackObject * tckobj)
{
guint64 *start, *end;
GESTimelinePrivate *priv = timeline->priv;
GSequenceIter *iter_start, *iter_end, *tckobj_iter;
start = g_hash_table_lookup (priv->by_start, tckobj);
end = g_hash_table_lookup (priv->by_end, tckobj);
iter_start = lookup_pointer_uint (priv->starts_ends, start);
iter_end = lookup_pointer_uint (priv->starts_ends, end);
tckobj_iter = g_sequence_lookup (timeline->priv->tracksources, tckobj,
(GCompareDataFunc) objects_start_compare, NULL);
g_hash_table_remove (priv->by_start, tckobj);
g_hash_table_remove (priv->by_end, tckobj);
g_hash_table_remove (priv->by_object, end);
g_hash_table_remove (priv->by_object, start);
g_sequence_remove (iter_start);
g_sequence_remove (iter_end);
g_sequence_remove (tckobj_iter);
}
static void
start_tracking_track_obj (GESTimeline * timeline, GESTrackObject * tckobj)
{
guint64 *pstart, *pend;
GESTimelinePrivate *priv = timeline->priv;
pstart = g_malloc (sizeof (guint64));
pend = g_malloc (sizeof (guint64));
*pstart = tckobj->start;
*pend = *pstart + tckobj->duration;
g_sequence_insert_sorted (priv->starts_ends, pstart,
(GCompareDataFunc) compare_uint64, NULL);
g_sequence_insert_sorted (priv->starts_ends, pend,
(GCompareDataFunc) compare_uint64, NULL);
g_sequence_insert_sorted (priv->tracksources, g_object_ref (tckobj),
(GCompareDataFunc) objects_start_compare, NULL);
g_hash_table_insert (priv->by_start, tckobj, pstart);
g_hash_table_insert (priv->by_object, pstart, tckobj);
g_hash_table_insert (priv->by_end, tckobj, pend);
g_hash_table_insert (priv->by_object, pend, tckobj);
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
static inline void
ges_timeline_emit_snappig (GESTimeline * timeline, GESTrackObject * obj1,
guint64 * timecode)
{
GESTrackObject *obj2;
obj2 = g_hash_table_lookup (timeline->priv->by_object, timecode);
g_signal_emit (timeline, ges_timeline_signals[OBJECT_SNAPPING], 0,
obj1, obj2, *timecode);
/* We then need to recalculate the moving context */
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
/* If passing @trackobj will emit the snapping signal, otherwize it won't */
static guint64 *
ges_timeline_snap_position (GESTimeline * timeline, GESTrackObject * trackobj,
guint64 * current, guint64 timecode)
{
GESTimelinePrivate *priv = timeline->priv;
GSequenceIter *iter, *prev_iter, *nxt_iter;
GESTrackObject *tmp_tckobj;
GESTimelineObject *tmp_tlobj, *tlobj;
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;
tlobj = ges_track_object_get_timeline_object (trackobj);
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_tckobj = g_hash_table_lookup (timeline->priv->by_object, next_tc);
tmp_tlobj = ges_track_object_get_timeline_object (tmp_tckobj);
off = timecode > *next_tc ? timecode - *next_tc : *next_tc - timecode;
if (next_tc != current && off <= snap_distance && tlobj != tmp_tlobj) {
ret = next_tc;
break;
}
nxt_iter = g_sequence_iter_next (nxt_iter);
}
prev_iter = g_sequence_iter_prev (iter);
while (!g_sequence_iter_is_begin (prev_iter)) {
prev_tc = g_sequence_get (prev_iter);
tmp_tckobj = g_hash_table_lookup (timeline->priv->by_object, prev_tc);
tmp_tlobj = ges_track_object_get_timeline_object (tmp_tckobj);
off1 = timecode > *prev_tc ? timecode - *prev_tc : *prev_tc - timecode;
if (prev_tc != current && off1 < off && off1 <= snap_distance &&
tlobj != tmp_tlobj) {
ret = prev_tc;
break;
}
prev_iter = g_sequence_iter_prev (prev_iter);
}
/* We emit the snapping signal only if we snapped with a different value
* than the current one */
if (trackobj && ret)
ges_timeline_emit_snappig (timeline, trackobj, ret);
return ret;
}
static inline GESTimelineObject *
add_moving_timeline_object (MoveContext * mv_ctx, GESTrackObject * tckobj)
{
GESTimelineObject *tlobj;
GESTimelineLayer *layer;
guint layer_prio;
tlobj = ges_track_object_get_timeline_object (tckobj);
/* Avoid recalculating */
if (!g_hash_table_lookup (mv_ctx->moving_tlobjs, tlobj)) {
layer = ges_timeline_object_get_layer (tlobj);
if (layer == NULL) {
GST_WARNING_OBJECT (tlobj, "Not in any layer, can not move"
" between layers");
} else {
g_hash_table_insert (mv_ctx->moving_tlobjs, tlobj, tlobj);
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 tlobj;
}
static gboolean
ges_move_context_set_objects (GESTimeline * timeline, GESTrackObject * obj,
GESEdge edge)
{
GSequenceIter *iter, *tckobj_iter;
guint64 start, end, tmpend;
GESTrackObject *tmptckobj;
MoveContext *mv_ctx = &timeline->priv->movecontext;
tckobj_iter = g_sequence_lookup (timeline->priv->tracksources, obj,
(GCompareDataFunc) objects_start_compare, NULL);
switch (edge) {
case GES_EDGE_START:
/* set it properly int the context of "trimming" */
mv_ctx->max_trim_pos = 0;
start = obj->start;
if (g_sequence_iter_is_begin (tckobj_iter))
break;
/* Look for the objects */
for (iter = g_sequence_iter_prev (tckobj_iter);
iter && !g_sequence_iter_is_end (iter);
iter = g_sequence_iter_prev (iter)) {
tmptckobj = GES_TRACK_OBJECT (g_sequence_get (iter));
tmpend = tmptckobj->start + tmptckobj->duration;
if (tmpend <= start) {
mv_ctx->max_trim_pos = MAX (mv_ctx->max_trim_pos, tmptckobj->start);
mv_ctx->moving_tckobjs =
g_list_prepend (mv_ctx->moving_tckobjs, tmptckobj);
}
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 = ges_track_object_get_start (obj) +
ges_track_object_get_duration (obj);
mv_ctx->max_trim_pos = G_MAXUINT64;
/* Look for folowing objects */
for (iter = g_sequence_iter_next (tckobj_iter);
iter && !g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter)) {
tmptckobj = GES_TRACK_OBJECT (g_sequence_get (iter));
if (tmptckobj->start >= end) {
tmpend = tmptckobj->start + tmptckobj->duration;
mv_ctx->max_trim_pos = MIN (mv_ctx->max_trim_pos, tmpend);
mv_ctx->moving_tckobjs =
g_list_prepend (mv_ctx->moving_tckobjs, tmptckobj);
}
}
break;
default:
GST_DEBUG ("Edge type %d no supported", edge);
return FALSE;
}
return TRUE;
}
static gboolean
ges_timeline_set_moving_context (GESTimeline * timeline, GESTrackObject * obj,
GESEditMode mode, GESEdge edge, GList * layers)
{
MoveContext *mv_ctx = &timeline->priv->movecontext;
GESTimelineObject *tlobj = ges_track_object_get_timeline_object (obj);
/* Still in the same mv_ctx */
if ((mv_ctx->obj == tlobj && 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 (tlobj,
"Changing context:\nold: obj: %p, mode: %d, edge: %d \n"
"new: obj: %p, mode: %d, edge: %d ! Has changed %i", mv_ctx->obj,
mv_ctx->mode, mv_ctx->edge, tlobj, mode, edge, mv_ctx->needs_move_ctx);
clean_movecontext (mv_ctx);
mv_ctx->edge = edge;
mv_ctx->mode = mode;
mv_ctx->obj = tlobj;
mv_ctx->needs_move_ctx = FALSE;
switch (mode) {
case GES_EDIT_MODE_RIPPLE:
case GES_EDIT_MODE_ROLL:
if (!(ges_move_context_set_objects (timeline, obj, edge)))
return FALSE;
default:
break;
}
/* And we add the main object to the moving_tlobjs set */
add_moving_timeline_object (&timeline->priv->movecontext, obj);
return TRUE;
}
gboolean
ges_timeline_trim_object_simple (GESTimeline * timeline, GESTrackObject * 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 = ges_track_object_get_start (obj);
g_object_get (obj, "max-duration", &max_duration, NULL);
switch (edge) {
case GES_EDGE_START:
inpoint = obj->inpoint;
duration = obj->duration;
if (snapping) {
cur = g_hash_table_lookup (timeline->priv->by_start, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
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 - obj->inpoint);
ges_track_object_set_start (obj, nstart);
ges_track_object_set_duration (obj, duration);
ges_track_object_set_inpoint (obj, inpoint);
break;
case GES_EDGE_END:
{
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
if (snapped)
position = *snapped;
/* Calculate new values */
real_dur = position - start;
duration = MAX (0, real_dur);
duration = MIN (duration, max_duration - obj->inpoint);
ges_track_object_set_duration (obj, duration);
break;
}
default:
GST_WARNING ("Can not trim with %i GESEdge", edge);
return FALSE;
}
return ret;
}
gboolean
timeline_ripple_object (GESTimeline * timeline, GESTrackObject * obj,
GList * layers, GESEdge edge, guint64 position)
{
GList *tmp, *moved_tlobjs = NULL;
GESTrackObject *tckobj;
GESTimelineObject *tlobj;
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");
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
if (snapped)
position = *snapped;
offset = position - obj->start;
for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) {
tckobj = GES_TRACK_OBJECT (tmp->data);
new_start = tckobj->start + offset;
tlobj = add_moving_timeline_object (mv_ctx, tckobj);
if (ges_track_object_is_locked (tckobj) == TRUE) {
/* Make sure not to move 2 times the same TimelineObject */
if (g_list_find (moved_tlobjs, tlobj) == NULL) {
ges_track_object_set_start (tckobj, new_start);
moved_tlobjs = g_list_prepend (moved_tlobjs, tlobj);
}
} else {
ges_track_object_set_start (tckobj, new_start);
}
}
g_list_free (moved_tlobjs);
ges_track_object_set_start (obj, position);
break;
case GES_EDGE_END:
GST_DEBUG ("Rippling end");
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
if (snapped)
position = *snapped;
duration = obj->duration;
ges_track_object_set_duration (obj, position - obj->start);
offset = obj->duration - duration;
for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) {
tckobj = GES_TRACK_OBJECT (tmp->data);
new_start = tckobj->start + offset;
tlobj = add_moving_timeline_object (mv_ctx, tckobj);
if (ges_track_object_is_locked (tckobj) == TRUE) {
/* Make sure not to move 2 times the same TimelineObject */
if (g_list_find (moved_tlobjs, tlobj) == NULL) {
ges_track_object_set_start (tckobj, new_start);
moved_tlobjs = g_list_prepend (moved_tlobjs, tlobj);
}
} else {
ges_track_object_set_start (tckobj, new_start);
}
}
g_list_free (moved_tlobjs);
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, GESTrackObject * obj,
GList * layers, GESEdge edge, guint64 position)
{
/* FIXME implement me! */
GST_WARNING ("Slide mode editing not implemented yet");
return FALSE;
}
gboolean
timeline_trim_object (GESTimeline * timeline, GESTrackObject * 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, GESTrackObject * 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 = ges_track_object_get_start (obj);
duration = ges_track_object_get_duration (obj);
end = start + duration;
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);
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 = obj->start;
/* Send back changes to the neighbourhood */
for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) {
GESTrackObject *tmptckobj = GES_TRACK_OBJECT (tmp->data);
tmpstart = ges_track_object_get_start (tmptckobj);
tmpduration = ges_track_object_get_duration (tmptckobj);
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, tmptckobj, 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 = obj->start + obj->duration;
cur = g_hash_table_lookup (timeline->priv->by_end, obj);
snapped = ges_timeline_snap_position (timeline, obj, cur, position);
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 = obj->start + obj->duration;
/* Send back changes to the neighbourhood */
for (tmp = mv_ctx->moving_tckobjs; tmp; tmp = tmp->next) {
GESTrackObject *tmptckobj = GES_TRACK_OBJECT (tmp->data);
tmpstart = ges_track_object_get_start (tmptckobj);
tmpduration = ges_track_object_get_duration (tmptckobj);
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, tmptckobj, NULL,
GES_EDGE_START, position, FALSE);
}
}
break;
default:
GST_DEBUG ("Edge type %i not handled here", edge);
break;
}
mv_ctx->ignore_needs_ctx = FALSE;
return ret;
error:
mv_ctx->ignore_needs_ctx = FALSE;
GST_DEBUG_OBJECT (obj, "Could not roll edge %d to %" GST_TIME_FORMAT,
edge, GST_TIME_ARGS (position));
return FALSE;
}
gboolean
timeline_move_object (GESTimeline * timeline, GESTrackObject * 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,
GESTrackObject * object, GList * layers, GESEdge edge, guint64 position)
{
guint64 *snap_end, *snap_st, *cur, off1, off2, end;
end = position + object->duration;
cur = g_hash_table_lookup (timeline->priv->by_end, object);
snap_end = ges_timeline_snap_position (timeline, object, cur, end);
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);
if (snap_st)
off2 = position > *snap_st ? position - *snap_st : *snap_st - position;
else
off2 = G_MAXUINT64;
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);
}
ges_track_object_set_start (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;
GESTimelineObject *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_tlobjs), offset);
g_hash_table_iter_init (&iter, mv_ctx->moving_tlobjs);
while (g_hash_table_iter_next (&iter, (gpointer *) & key,
(gpointer *) & value)) {
layer = ges_timeline_object_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->priv->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_timeline_object_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 (GESTimelineObject * object, GESTrack * track)
{
if (!ges_timeline_object_create_track_objects (object, track)) {
if ((track->type & ges_timeline_object_get_supported_formats (object))) {
GST_WARNING ("Error creating track objects");
}
}
}
static void
add_object_to_tracks (GESTimeline * timeline, GESTimelineObject * object)
{
GList *tmp;
for (tmp = timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
GESTrack *track = tr_priv->track;
GST_LOG ("Trying with track %p", track);
add_object_to_track (object, track);
}
}
static void
do_async_start (GESTimeline * timeline)
{
GstMessage *message;
GList *tmp;
timeline->priv->async_pending = TRUE;
/* Freeze state of tracks */
for (tmp = timeline->priv->tracks; tmp; tmp = tmp->next) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
gst_element_set_locked_state ((GstElement *) tr_priv->track, TRUE);
}
message = gst_message_new_async_start (GST_OBJECT_CAST (timeline), FALSE);
parent_class->handle_message (GST_BIN_CAST (timeline), message);
}
static void
do_async_done (GESTimeline * timeline)
{
GstMessage *message;
if (timeline->priv->async_pending) {
GList *tmp;
/* Unfreeze state of tracks */
for (tmp = timeline->priv->tracks; tmp; tmp = tmp->next) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
gst_element_set_locked_state ((GstElement *) tr_priv->track, FALSE);
gst_element_sync_state_with_parent ((GstElement *) tr_priv->track);
}
GST_DEBUG_OBJECT (timeline, "Emitting async-done");
message = gst_message_new_async_done (GST_OBJECT_CAST (timeline));
parent_class->handle_message (GST_BIN_CAST (timeline), message);
timeline->priv->async_pending = FALSE;
}
}
/* Callbacks */
static void
discoverer_finished_cb (GstDiscoverer * discoverer, GESTimeline * timeline)
{
do_async_done (timeline);
}
static void
discoverer_discovered_cb (GstDiscoverer * discoverer,
GstDiscovererInfo * info, GError * err, GESTimeline * timeline)
{
GList *tmp;
GList *stream_list;
GESTrackType tfs_supportedformats;
gboolean found = FALSE;
gboolean is_image = FALSE;
GESTimelineFileSource *tfs = NULL;
GESTimelinePrivate *priv = timeline->priv;
const gchar *uri = gst_discoverer_info_get_uri (info);
GES_TIMELINE_PENDINGOBJS_LOCK (timeline);
/* Find corresponding TimelineFileSource in the sources */
for (tmp = priv->pendingobjects; tmp; tmp = tmp->next) {
tfs = (GESTimelineFileSource *) tmp->data;
if (!g_strcmp0 (ges_timeline_filesource_get_uri (tfs), uri)) {
found = TRUE;
break;
}
}
if (!found) {
GST_WARNING ("Discovered %s, that seems not to be in the list of sources"
"to discover", uri);
GES_TIMELINE_PENDINGOBJS_UNLOCK (timeline);
return;
}
if (err) {
GError *propagate_error = NULL;
priv->pendingobjects = g_list_delete_link (priv->pendingobjects, tmp);
GES_TIMELINE_PENDINGOBJS_UNLOCK (timeline);
GST_WARNING ("Error while discovering %s: %s", uri, err->message);
g_propagate_error (&propagate_error, err);
g_signal_emit (timeline, ges_timeline_signals[DISCOVERY_ERROR], 0, tfs,
propagate_error);
return;
}
/* Everything went fine... let's do our job! */
GST_DEBUG ("Discovered uri %s", uri);
/* The timeline file source will be updated with discovered information
* so it needs to not be finalized during this process */
g_object_ref (tfs);
/* Remove object from list */
priv->pendingobjects = g_list_delete_link (priv->pendingobjects, tmp);
GES_TIMELINE_PENDINGOBJS_UNLOCK (timeline);
/* FIXME : Handle errors in discovery */
stream_list = gst_discoverer_info_get_stream_list (info);
tfs_supportedformats = ges_timeline_filesource_get_supported_formats (tfs);
if (tfs_supportedformats != GES_TRACK_TYPE_UNKNOWN)
goto check_image;
/* Update timelinefilesource properties based on info */
for (tmp = stream_list; tmp; tmp = tmp->next) {
GstDiscovererStreamInfo *sinf = (GstDiscovererStreamInfo *) tmp->data;
if (GST_IS_DISCOVERER_AUDIO_INFO (sinf)) {
tfs_supportedformats |= GES_TRACK_TYPE_AUDIO;
ges_timeline_filesource_set_supported_formats (tfs, tfs_supportedformats);
} else if (GST_IS_DISCOVERER_VIDEO_INFO (sinf)) {
tfs_supportedformats |= GES_TRACK_TYPE_VIDEO;
ges_timeline_filesource_set_supported_formats (tfs, tfs_supportedformats);
if (gst_discoverer_video_info_is_image ((GstDiscovererVideoInfo *)
sinf)) {
tfs_supportedformats |= GES_TRACK_TYPE_AUDIO;
ges_timeline_filesource_set_supported_formats (tfs,
tfs_supportedformats);
is_image = TRUE;
}
}
}
if (stream_list)
gst_discoverer_stream_info_list_free (stream_list);
check_image:
if (is_image) {
/* don't set max-duration on still images */
g_object_set (tfs, "is_image", (gboolean) TRUE, NULL);
}
/* Continue the processing on tfs */
add_object_to_tracks (timeline, GES_TIMELINE_OBJECT (tfs));
if (!is_image) {
g_object_set (tfs, "max-duration",
gst_discoverer_info_get_duration (info), NULL);
}
/* Remove the ref as the timeline file source is no longer needed here */
g_object_unref (tfs);
}
static void
layer_object_added_cb (GESTimelineLayer * layer, GESTimelineObject * object,
GESTimeline * timeline)
{
if (ges_timeline_object_is_moving_from_layer (object)) {
GST_DEBUG ("TimelineObject %p is moving from a layer to another, not doing"
" anything on it", object);
if (!timeline->priv->movecontext.ignore_needs_ctx)
timeline->priv->movecontext.needs_move_ctx = TRUE;
return;
}
GST_DEBUG ("New TimelineObject %p added to layer %p", object, layer);
if (GES_IS_TIMELINE_FILE_SOURCE (object)) {
GESTimelineFileSource *tfs = GES_TIMELINE_FILE_SOURCE (object);
GESTrackType tfs_supportedformats =
ges_timeline_filesource_get_supported_formats (tfs);
guint64 tfs_maxdur = ges_timeline_filesource_get_max_duration (tfs);
const gchar *tfs_uri;
/* Send the filesource to the discoverer if:
* * it doesn't have specified supported formats
* * OR it doesn't have a specified max-duration
* * OR it doesn't have a valid duration */
if (tfs_supportedformats == GES_TRACK_TYPE_UNKNOWN ||
tfs_maxdur == GST_CLOCK_TIME_NONE || object->duration == 0) {
GST_LOG ("Incomplete TimelineFileSource, discovering it");
tfs_uri = ges_timeline_filesource_get_uri (tfs);
GES_TIMELINE_PENDINGOBJS_LOCK (timeline);
timeline->priv->pendingobjects =
g_list_append (timeline->priv->pendingobjects, object);
GES_TIMELINE_PENDINGOBJS_UNLOCK (timeline);
gst_discoverer_discover_uri_async (timeline->priv->discoverer, tfs_uri);
} else
add_object_to_tracks (timeline, object);
} else {
add_object_to_tracks (timeline, object);
}
GST_DEBUG ("done");
}
static void
layer_priority_changed_cb (GESTimelineLayer * layer,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
timeline->priv->layers = g_list_sort (timeline->priv->layers, (GCompareFunc)
sort_layers);
}
static void
layer_object_removed_cb (GESTimelineLayer * layer, GESTimelineObject * object,
GESTimeline * timeline)
{
GList *trackobjects, *tmp;
if (ges_timeline_object_is_moving_from_layer (object)) {
GST_DEBUG ("TimelineObject %p is moving from a layer to another, not doing"
" anything on it", object);
return;
}
GST_DEBUG ("TimelineObject %p removed from layer %p", object, layer);
/* Go over the object's track objects and figure out which one belongs to
* the list of tracks we control */
trackobjects = ges_timeline_object_get_track_objects (object);
for (tmp = trackobjects; tmp; tmp = tmp->next) {
GESTrackObject *trobj = (GESTrackObject *) tmp->data;
GST_DEBUG ("Trying to remove TrackObject %p", trobj);
if (G_LIKELY (g_list_find_custom (timeline->priv->tracks,
ges_track_object_get_track (trobj),
(GCompareFunc) custom_find_track))) {
GST_DEBUG ("Belongs to one of the tracks we control");
ges_track_remove_object (ges_track_object_get_track (trobj), trobj);
ges_timeline_object_release_track_object (object, trobj);
}
/* removing the reference added by _get_track_objects() */
g_object_unref (trobj);
}
g_list_free (trackobjects);
/* if the object is a timeline file source that has not yet been discovered,
* it no longer needs to be discovered so remove it from the pendingobjects
* list if it belongs to this layer */
if (GES_IS_TIMELINE_FILE_SOURCE (object)) {
GES_TIMELINE_PENDINGOBJS_LOCK (timeline);
timeline->priv->pendingobjects =
g_list_remove_all (timeline->priv->pendingobjects, object);
GES_TIMELINE_PENDINGOBJS_UNLOCK (timeline);
}
GST_DEBUG ("Done");
}
static void
trackobj_start_changed_cb (GESTrackObject * child,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
sort_track_objects (timeline);
sort_starts_ends_start (timeline, child);
sort_starts_ends_end (timeline, child);
if (!timeline->priv->movecontext.ignore_needs_ctx)
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
static void
trackobj_duration_changed_cb (GESTrackObject * child,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
sort_starts_ends_end (timeline, child);
if (!timeline->priv->movecontext.ignore_needs_ctx)
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
static void
trackobj_inpoint_changed_cb (GESTrackObject * child,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
if (!timeline->priv->movecontext.ignore_needs_ctx)
timeline->priv->movecontext.needs_move_ctx = TRUE;
}
static void
track_object_added_cb (GESTrack * track, GESTrackObject * object,
GESTimeline * timeline)
{
/* We only work with sources */
if (GES_IS_TRACK_SOURCE (object)) {
start_tracking_track_obj (timeline, object);
g_signal_connect (GES_TRACK_OBJECT (object), "notify::start",
G_CALLBACK (trackobj_start_changed_cb), timeline);
g_signal_connect (GES_TRACK_OBJECT (object), "notify::duration",
G_CALLBACK (trackobj_duration_changed_cb), timeline);
g_signal_connect (GES_TRACK_OBJECT (object), "notify::in-point",
G_CALLBACK (trackobj_inpoint_changed_cb), timeline);
}
}
static void
track_object_removed_cb (GESTrack * track, GESTrackObject * object,
GESTimeline * timeline)
{
/* We only work with sources */
if (GES_IS_TRACK_SOURCE (object)) {
g_signal_handlers_disconnect_by_func (object, trackobj_start_changed_cb,
NULL);
g_signal_handlers_disconnect_by_func (object, trackobj_duration_changed_cb,
NULL);
g_signal_handlers_disconnect_by_func (object, trackobj_inpoint_changed_cb,
NULL);
/* Make sure to reinitialise the moving context next time */
timeline->priv->movecontext.needs_move_ctx = TRUE;
stop_tracking_for_snapping (timeline, object);
}
}
static void
track_duration_cb (GstElement * track,
GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline)
{
guint64 duration, max_duration = 0;
GList *tmp;
for (tmp = timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
g_object_get (tr_priv->track, "duration", &duration, NULL);
GST_DEBUG_OBJECT (track, "track duration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (duration));
max_duration = MAX (duration, max_duration);
}
if (timeline->priv->duration != max_duration) {
GST_DEBUG ("track duration : %" GST_TIME_FORMAT " current : %"
GST_TIME_FORMAT, GST_TIME_ARGS (max_duration),
GST_TIME_ARGS (timeline->priv->duration));
timeline->priv->duration = max_duration;
#if GLIB_CHECK_VERSION(2,26,0)
g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]);
#else
g_object_notify (G_OBJECT (timeline), "duration");
#endif
}
}
static GstStateChangeReturn
ges_timeline_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GESTimeline *timeline = GES_TIMELINE (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
GES_TIMELINE_PENDINGOBJS_LOCK (timeline);
if (timeline->priv->pendingobjects) {
GES_TIMELINE_PENDINGOBJS_UNLOCK (timeline);
do_async_start (timeline);
ret = GST_STATE_CHANGE_ASYNC;
} else {
GES_TIMELINE_PENDINGOBJS_UNLOCK (timeline);
}
break;
default:
break;
}
{
GstStateChangeReturn bret;
bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) {
do_async_done (timeline);
ret = bret;
}
}
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
do_async_done (timeline);
break;
default:
break;
}
return ret;
}
/**
* 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
*
* 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)
{
GESTimeline *ret;
/* FIXME : we should have a GError** argument so the user can know why
* it wasn't able to load the uri
*/
ret = ges_timeline_new ();
if (!ges_timeline_load_from_uri (ret, uri)) {
g_object_unref (ret);
return NULL;
}
return ret;
}
/**
* ges_timeline_load_from_uri:
* @timeline: an empty #GESTimeline into which to load the formatter
* @uri: The URI to load from
*
* 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)
{
GESFormatter *p = NULL;
gboolean ret = FALSE;
/* FIXME : we should have a GError** argument so the user can know why
* it wasn't able to load the uri
*/
if (!(p = ges_formatter_new_for_uri (uri))) {
GST_ERROR ("unsupported uri '%s'", uri);
goto fail;
}
if (!ges_formatter_load_from_uri (p, timeline, uri)) {
GST_ERROR ("error deserializing formatter");
goto fail;
}
ret = TRUE;
fail:
if (p)
g_object_unref (p);
return ret;
}
/**
* ges_timeline_save_to_uri:
* @timeline: a #GESTimeline
* @uri: The location to save to
*
* 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)
{
GESFormatter *p = NULL;
gboolean ret = FALSE;
/* FIXME : How will the user be able to chose the format he
* wishes to store to ? */
/* FIXME : How will we ensure a timeline loaded with a certain format
* will be saved with the same one by default ? We need to make this
* easy from an API perspective */
/* FIXME : we should have a GError** argument so the user can know why
* it wasn't able to save
*/
if (!(p = ges_formatter_new_for_uri (uri))) {
GST_ERROR ("unsupported uri '%s'", uri);
goto fail;
}
if (!ges_formatter_save_to_uri (p, timeline, uri)) {
GST_ERROR ("error serializing formatter");
goto fail;
}
ret = TRUE;
fail:
if (p)
g_object_unref (p);
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;
GESTimelinePrivate *priv = timeline->priv;
GESTimelineLayer *layer;
layer = ges_timeline_layer_new ();
priority = g_list_length (priv->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;
GESTimelinePrivate *priv = timeline->priv;
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 (priv->layers, (gconstpointer) layer))) {
GST_WARNING ("Layer is already controlled by this timeline");
return FALSE;
}
g_object_ref_sink (layer);
priv->layers = g_list_insert_sorted (priv->layers, layer,
(GCompareFunc) sort_layers);
/* Inform the layer that it belongs to a new timeline */
ges_timeline_layer_set_timeline (layer, timeline);
/* Connect to 'object-added'/'object-removed' signal from the new layer */
g_signal_connect (layer, "object-added", G_CALLBACK (layer_object_added_cb),
timeline);
g_signal_connect (layer, "object-removed",
G_CALLBACK (layer_object_removed_cb), timeline);
g_signal_connect (layer, "notify::priority",
G_CALLBACK (layer_priority_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 timeline objects to the timeline */
objects = ges_timeline_layer_get_objects (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;
GESTimelinePrivate *priv = timeline->priv;
GST_DEBUG ("timeline:%p, layer:%p", timeline, layer);
if (G_UNLIKELY (!g_list_find (priv->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_objects (layer);
for (tmp = layer_objects; tmp; tmp = tmp->next) {
layer_object_removed_cb (layer, GES_TIMELINE_OBJECT (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);
priv->layers = g_list_remove (priv->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;
}
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->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;
}
/**
* 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 objects for timeline objects which have already been
* added to existing layers.
*/
gboolean
ges_timeline_add_track (GESTimeline * timeline, GESTrack * track)
{
TrackPrivate *tr_priv;
GESTimelinePrivate *priv = timeline->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_custom (priv->tracks, (gconstpointer) track,
(GCompareFunc) custom_find_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 */
priv->tracks = g_list_append (priv->tracks, tr_priv);
/* 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 timeline object has the opportunity to create a
* track object for this track*/
/* We connect to the duration change notify, so we can update
* our duration accordingly */
g_signal_connect (G_OBJECT (track), "notify::duration",
G_CALLBACK (track_duration_cb), timeline);
/* We connect to the object for the timeline editing mode management */
g_signal_connect (G_OBJECT (track), "track-object-added",
G_CALLBACK (track_object_added_cb), timeline);
g_signal_connect (G_OBJECT (track), "track-object-removed",
G_CALLBACK (track_object_removed_cb), timeline);
for (tmp = priv->layers; tmp; tmp = tmp->next) {
GList *objects, *obj;
objects = ges_timeline_layer_get_objects (tmp->data);
for (obj = objects; obj; obj = obj->next) {
add_object_to_track (obj->data, track);
g_object_unref (obj->data);
obj->data = NULL;
}
g_list_free (objects);
}
track_duration_cb (GST_ELEMENT (track), NULL, timeline);
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 objects associated with this layer. currenly this
* will not happen if you remove the track before removing *all*
* timelineobjects which have a track object in this track.
*/
gboolean
ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track)
{
GList *tmp;
TrackPrivate *tr_priv;
GESTimelinePrivate *priv = timeline->priv;
GST_DEBUG ("timeline:%p, track:%p", timeline, track);
if (G_UNLIKELY (!(tmp =
g_list_find_custom (priv->tracks, (gconstpointer) track,
(GCompareFunc) custom_find_track)))) {
GST_WARNING ("Track doesn't belong to this timeline");
return FALSE;
}
tr_priv = tmp->data;
priv->tracks = g_list_remove (priv->tracks, tr_priv);
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_duration_cb,
tr_priv->track);
g_signal_handlers_disconnect_by_func (track, track_object_added_cb, timeline);
g_signal_handlers_disconnect_by_func (track, track_object_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->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)
{
GList *tmp, *res = NULL;
for (tmp = timeline->priv->tracks; tmp; tmp = g_list_next (tmp)) {
TrackPrivate *tr_priv = (TrackPrivate *) tmp->data;
res = g_list_append (res, g_object_ref (tr_priv->track));
}
return res;
}
/**
* 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->priv->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->priv->tracks; tmp; tmp = tmp->next) {
if (!ges_track_is_updating (((TrackPrivate *) tmp->data)->track))
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->priv->tracks; tmp; tmp = tmp->next) {
if (!ges_track_enable_update (((TrackPrivate *) tmp->data)->track, enabled))
res = FALSE;
}
/* Make sure we reset the context */
timeline->priv->movecontext.needs_move_ctx = TRUE;
return res;
}
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