1 /* GStreamer Editing Services
2 * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
3 * 2009 Nokia Corporation
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
23 * @short_description: Composition of objects
25 * Corresponds to one output format (i.e. audio OR video).
27 * Contains the compatible TrackObject(s).
29 * Wraps GNonLin's 'gnlcomposition' element.
32 #include "ges-internal.h"
33 #include "ges-track.h"
34 #include "ges-track-object.h"
35 #include "gesmarshal.h"
37 G_DEFINE_TYPE (GESTrack, ges_track, GST_TYPE_BIN);
39 struct _GESTrackPrivate
42 GESTimeline *timeline;
48 GstElement *composition; /* The composition associated with this track */
49 GstPad *srcpad; /* The source GhostPad */
63 static guint ges_track_signals[LAST_SIGNAL] = { 0 };
65 static GParamSpec *properties[ARG_LAST];
67 static void pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track);
69 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track);
70 static void composition_duration_cb (GstElement * composition, GParamSpec * arg
71 G_GNUC_UNUSED, GESTrack * obj);
74 ges_track_get_property (GObject * object, guint property_id,
75 GValue * value, GParamSpec * pspec)
77 GESTrack *track = GES_TRACK (object);
79 switch (property_id) {
81 gst_value_set_caps (value, track->priv->caps);
84 g_value_set_flags (value, track->type);
87 g_value_set_uint64 (value, track->priv->duration);
90 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
95 ges_track_set_property (GObject * object, guint property_id,
96 const GValue * value, GParamSpec * pspec)
98 GESTrack *track = GES_TRACK (object);
100 switch (property_id) {
102 ges_track_set_caps (track, gst_value_get_caps (value));
105 track->type = g_value_get_flags (value);
108 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
113 ges_track_dispose (GObject * object)
115 GESTrack *track = (GESTrack *) object;
116 GESTrackPrivate *priv = track->priv;
118 while (priv->trackobjects) {
119 GESTrackObject *trobj = GES_TRACK_OBJECT (priv->trackobjects->data);
120 ges_track_remove_object (track, trobj);
121 ges_timeline_object_release_track_object ((GESTimelineObject *)
122 ges_track_object_get_timeline_object (trobj), trobj);
125 if (priv->composition) {
126 gst_bin_remove (GST_BIN (object), priv->composition);
127 priv->composition = NULL;
131 gst_caps_unref (priv->caps);
135 G_OBJECT_CLASS (ges_track_parent_class)->dispose (object);
139 ges_track_finalize (GObject * object)
141 G_OBJECT_CLASS (ges_track_parent_class)->finalize (object);
145 ges_track_class_init (GESTrackClass * klass)
147 GObjectClass *object_class = G_OBJECT_CLASS (klass);
149 g_type_class_add_private (klass, sizeof (GESTrackPrivate));
151 object_class->get_property = ges_track_get_property;
152 object_class->set_property = ges_track_set_property;
153 object_class->dispose = ges_track_dispose;
154 object_class->finalize = ges_track_finalize;
159 * Caps used to filter/choose the output stream. This is generally set to
160 * a generic set of caps like 'video/x-raw-rgb;video/x-raw-yuv' for raw video.
162 * Default value: #GST_CAPS_ANY.
164 properties[ARG_CAPS] = g_param_spec_boxed ("caps", "Caps",
165 "Caps used to filter/choose the output stream",
166 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_CONSTRUCT);
167 g_object_class_install_property (object_class, ARG_CAPS,
168 properties[ARG_CAPS]);
173 * Current duration of the track
177 properties[ARG_DURATION] = g_param_spec_uint64 ("duration", "Duration",
178 "The current duration of the track", 0, G_MAXUINT64, GST_SECOND,
180 g_object_class_install_property (object_class, ARG_DURATION,
181 properties[ARG_DURATION]);
184 * GESTrack:track-type
186 * Type of stream the track outputs. This is used when creating the #GESTrack
187 * to specify in generic terms what type of content will be outputted.
189 * It also serves as a 'fast' way to check what type of data will be outputted
190 * from the #GESTrack without having to actually check the #GESTrack's caps
193 properties[ARG_TYPE] = g_param_spec_flags ("track-type", "TrackType",
194 "Type of stream the track outputs",
195 GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_CUSTOM,
196 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
197 g_object_class_install_property (object_class, ARG_TYPE,
198 properties[ARG_TYPE]);
201 * GESTrack::track-object-added
202 * @object: the #GESTrack
203 * @effect: the #GESTrackObject that was added.
205 * Will be emitted after a track object was added to the track.
209 ges_track_signals[TRACK_OBJECT_ADDED] =
210 g_signal_new ("track-object-added", G_TYPE_FROM_CLASS (klass),
211 G_SIGNAL_RUN_FIRST, 0, NULL, NULL, ges_marshal_VOID__OBJECT,
212 G_TYPE_NONE, 1, GES_TYPE_TRACK_OBJECT);
217 ges_track_init (GESTrack * self)
219 self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
220 GES_TYPE_TRACK, GESTrackPrivate);
222 self->priv->composition = gst_element_factory_make ("gnlcomposition", NULL);
224 g_signal_connect (G_OBJECT (self->priv->composition), "notify::duration",
225 G_CALLBACK (composition_duration_cb), self);
226 g_signal_connect (self->priv->composition, "pad-added",
227 (GCallback) pad_added_cb, self);
228 g_signal_connect (self->priv->composition, "pad-removed",
229 (GCallback) pad_removed_cb, self);
231 if (!gst_bin_add (GST_BIN (self), self->priv->composition))
232 GST_ERROR ("Couldn't add composition to bin !");
237 * @type: The type of track
238 * @caps: The caps to restrict the output of the track to.
240 * Creates a new #GESTrack with the given @type and @caps.
242 * The newly created track will steal a reference to the caps. If you wish to
243 * use those caps elsewhere, you will have to take an extra reference.
245 * Returns: A new #GESTrack.
248 ges_track_new (GESTrackType type, GstCaps * caps)
252 track = g_object_new (GES_TYPE_TRACK, "caps", caps, "track-type", type, NULL);
253 gst_caps_unref (caps);
259 * ges_track_video_raw_new:
261 * Creates a new #GESTrack of type #GES_TRACK_TYPE_VIDEO and with generic
262 * raw video caps ("video/x-raw-yuv;video/x-raw-rgb");
264 * Returns: A new #GESTrack.
267 ges_track_video_raw_new (void)
270 GstCaps *caps = gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb");
272 track = ges_track_new (GES_TRACK_TYPE_VIDEO, caps);
278 * ges_track_audio_raw_new:
280 * Creates a new #GESTrack of type #GES_TRACK_TYPE_AUDIO and with generic
281 * raw audio caps ("audio/x-raw-int;audio/x-raw-float");
283 * Returns: A new #GESTrack.
286 ges_track_audio_raw_new (void)
289 GstCaps *caps = gst_caps_from_string ("audio/x-raw-int;audio/x-raw-float");
291 track = ges_track_new (GES_TRACK_TYPE_AUDIO, caps);
297 * ges_track_set_timeline:
298 * @track: a #GESTrack
299 * @timeline: a #GESTimeline
301 * Sets @timeline as the timeline controlling @track.
304 ges_track_set_timeline (GESTrack * track, GESTimeline * timeline)
306 GST_DEBUG ("track:%p, timeline:%p", track, timeline);
308 track->priv->timeline = timeline;
312 * ges_track_set_caps:
313 * @track: a #GESTrack
314 * @caps: the #GstCaps to set
316 * Sets the given @caps on the track.
319 ges_track_set_caps (GESTrack * track, const GstCaps * caps)
321 GESTrackPrivate *priv;
323 g_return_if_fail (GES_IS_TRACK (track));
324 g_return_if_fail (GST_IS_CAPS (caps));
326 GST_DEBUG ("track:%p, caps:%" GST_PTR_FORMAT, track, caps);
331 gst_caps_unref (priv->caps);
332 priv->caps = gst_caps_copy (caps);
334 g_object_set (priv->composition, "caps", caps, NULL);
335 /* FIXME : update all trackobjects ? */
339 /* FIXME : put the compare function in the utils */
342 objects_start_compare (GESTrackObject * a, GESTrackObject * b)
344 if (a->start == b->start) {
345 if (a->priority < b->priority)
347 if (a->priority > b->priority)
351 if (a->start < b->start)
353 if (a->start > b->start)
359 * ges_track_add_object:
360 * @track: a #GESTrack
361 * @object: (transfer full): the #GESTrackObject to add
363 * Adds the given object to the track. Sets the object's controlling track,
364 * and thus takes ownership of the @object.
366 * An object can only be added to one track.
368 * Returns: #TRUE if the object was properly added. #FALSE if the track does not
369 * want to accept the object.
372 ges_track_add_object (GESTrack * track, GESTrackObject * object)
374 g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
375 g_return_val_if_fail (GES_IS_TRACK_OBJECT (object), FALSE);
377 GST_DEBUG ("track:%p, object:%p", track, object);
379 if (G_UNLIKELY (ges_track_object_get_track (object) != NULL)) {
380 GST_WARNING ("Object already belongs to another track");
384 /* At this point, the track object shouldn't have any gnlobject since
385 * it hasn't been added to a track yet.
386 * FIXME : This check seems a bit obsolete */
387 if (G_UNLIKELY (ges_track_object_get_gnlobject (object) != NULL)) {
388 GST_ERROR ("TrackObject already controls a gnlobject !");
392 if (G_UNLIKELY (!ges_track_object_set_track (object, track))) {
393 GST_ERROR ("Couldn't properly add the object to the Track");
397 GST_DEBUG ("Adding object to ourself");
399 if (G_UNLIKELY (!gst_bin_add (GST_BIN (track->priv->composition),
400 ges_track_object_get_gnlobject (object)))) {
401 GST_WARNING ("Couldn't add object to the GnlComposition");
405 g_object_ref_sink (object);
406 track->priv->trackobjects =
407 g_list_insert_sorted (track->priv->trackobjects, object,
408 (GCompareFunc) objects_start_compare);
409 g_signal_emit (track, ges_track_signals[TRACK_OBJECT_ADDED], 0,
410 GES_TRACK_OBJECT (object));
416 ges_track_get_objects (GESTrack * track)
421 g_return_val_if_fail (GES_IS_TRACK (track), NULL);
423 for (tmp = track->priv->trackobjects; tmp; tmp = tmp->next) {
424 ret = g_list_prepend (ret, tmp->data);
425 g_object_ref (tmp->data);
428 ret = g_list_reverse (ret);
433 * ges_track_remove_object:
434 * @track: a #GESTrack
435 * @object: the #GESTrackObject to remove
437 * Removes the object from the track and unparents it.
438 * Unparenting it means the reference owned by @track on the @object will be
439 * removed. If you wish to use the @object after this function, make sure you
440 * call g_object_ref() before removing it from the @track.
442 * Returns: #TRUE if the object was removed, else #FALSE if the track
443 * could not remove the object (like if it didn't belong to the track).
446 ges_track_remove_object (GESTrack * track, GESTrackObject * object)
448 GESTrackPrivate *priv;
449 GstElement *gnlobject;
451 g_return_val_if_fail (GES_IS_TRACK (track), FALSE);
452 g_return_val_if_fail (GES_IS_TRACK_OBJECT (object), FALSE);
454 GST_DEBUG ("track:%p, object:%p", track, object);
458 if (G_UNLIKELY (ges_track_object_get_track (object) != track)) {
459 GST_WARNING ("Object belongs to another track");
463 if ((gnlobject = ges_track_object_get_gnlobject (object))) {
464 GST_DEBUG ("Removing GnlObject '%s' from composition '%s'",
465 GST_ELEMENT_NAME (gnlobject), GST_ELEMENT_NAME (priv->composition));
466 if (!gst_bin_remove (GST_BIN (priv->composition), gnlobject)) {
467 GST_WARNING ("Failed to remove gnlobject from composition");
472 ges_track_object_set_track (object, NULL);
473 priv->trackobjects = g_list_remove (priv->trackobjects, object);
475 g_object_unref (object);
481 pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track)
483 GESTrackPrivate *priv = track->priv;
485 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
488 priv->srcpad = gst_ghost_pad_new ("src", pad);
490 gst_pad_set_active (priv->srcpad, TRUE);
492 gst_element_add_pad (GST_ELEMENT (track), priv->srcpad);
498 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track)
500 GESTrackPrivate *priv = track->priv;
502 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
504 if (G_LIKELY (priv->srcpad)) {
505 gst_pad_set_active (priv->srcpad, FALSE);
506 gst_element_remove_pad (GST_ELEMENT (track), priv->srcpad);
514 composition_duration_cb (GstElement * composition,
515 GParamSpec * arg G_GNUC_UNUSED, GESTrack * obj)
519 g_object_get (composition, "duration", &duration, NULL);
522 if (obj->priv->duration != duration) {
523 GST_DEBUG ("composition duration : %" GST_TIME_FORMAT " current : %"
524 GST_TIME_FORMAT, GST_TIME_ARGS (duration),
525 GST_TIME_ARGS (obj->priv->duration));
527 obj->priv->duration = duration;
529 #if GLIB_CHECK_VERSION(2,26,0)
530 g_object_notify_by_pspec (G_OBJECT (obj), properties[ARG_DURATION]);
532 g_object_notify (G_OBJECT (obj), "duration");
538 * ges_track_get_caps:
539 * @track: a #GESTrack
541 * Get the #GstCaps this track is configured to output.
543 * Returns: The #GstCaps this track is configured to output.
546 ges_track_get_caps (GESTrack * track)
548 g_return_val_if_fail (GES_IS_TRACK (track), NULL);
550 return track->priv->caps;
554 * ges_track_get_timeline:
555 * @track: a #GESTrack
557 * Get the #GESTimeline this track belongs to. Can be %NULL.
559 * Returns: The #GESTimeline this track belongs to. Can be %NULL.
562 ges_track_get_timeline (GESTrack * track)
564 g_return_val_if_fail (GES_IS_TRACK (track), NULL);
566 return track->priv->timeline;