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"
36 G_DEFINE_TYPE (GESTrack, ges_track, GST_TYPE_BIN);
38 struct _GESTrackPrivate
51 static void pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track);
54 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track);
57 ges_track_get_property (GObject * object, guint property_id,
58 GValue * value, GParamSpec * pspec)
60 GESTrack *track = GES_TRACK (object);
62 switch (property_id) {
64 gst_value_set_caps (value, track->caps);
67 g_value_set_flags (value, track->type);
70 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
75 ges_track_set_property (GObject * object, guint property_id,
76 const GValue * value, GParamSpec * pspec)
78 GESTrack *track = GES_TRACK (object);
80 switch (property_id) {
82 ges_track_set_caps (track, gst_value_get_caps (value));
85 track->type = g_value_get_flags (value);
88 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
93 ges_track_dispose (GObject * object)
95 GESTrack *track = (GESTrack *) object;
97 while (track->trackobjects) {
98 GESTrackObject *trobj = GES_TRACK_OBJECT (track->trackobjects->data);
99 ges_track_remove_object (track, trobj);
100 ges_timeline_object_release_track_object (trobj->timelineobj, trobj);
103 if (track->composition) {
104 gst_bin_remove (GST_BIN (object), track->composition);
105 track->composition = NULL;
109 gst_caps_unref (track->caps);
113 G_OBJECT_CLASS (ges_track_parent_class)->dispose (object);
117 ges_track_finalize (GObject * object)
119 G_OBJECT_CLASS (ges_track_parent_class)->finalize (object);
123 ges_track_class_init (GESTrackClass * klass)
125 GObjectClass *object_class = G_OBJECT_CLASS (klass);
127 g_type_class_add_private (klass, sizeof (GESTrackPrivate));
129 object_class->get_property = ges_track_get_property;
130 object_class->set_property = ges_track_set_property;
131 object_class->dispose = ges_track_dispose;
132 object_class->finalize = ges_track_finalize;
137 * Caps used to filter/choose the output stream. This is generally set to
138 * a generic set of caps like 'video/x-raw-rgb;video/x-raw-yuv' for raw video.
140 * Default value: #GST_CAPS_ANY.
142 g_object_class_install_property (object_class, ARG_CAPS,
143 g_param_spec_boxed ("caps", "Caps",
144 "Caps used to filter/choose the output stream",
145 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
148 * GESTrack:track-type
150 * Type of stream the track outputs. This is used when creating the #GESTrack
151 * to specify in generic terms what type of content will be outputted.
153 * It also serves as a 'fast' way to check what type of data will be outputted
154 * from the #GESTrack without having to actually check the #GESTrack's caps
157 g_object_class_install_property (object_class, ARG_TYPE,
158 g_param_spec_flags ("track-type", "TrackType",
159 "Type of stream the track outputs",
160 GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_CUSTOM,
161 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
165 ges_track_init (GESTrack * self)
167 self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
168 GES_TYPE_TRACK, GESTrackPrivate);
170 self->composition = gst_element_factory_make ("gnlcomposition", NULL);
172 g_signal_connect (self->composition, "pad-added", (GCallback) pad_added_cb,
174 g_signal_connect (self->composition, "pad-removed",
175 (GCallback) pad_removed_cb, self);
177 if (!gst_bin_add (GST_BIN (self), self->composition))
178 GST_ERROR ("Couldn't add composition to bin !");
183 * @type: The type of track
184 * @caps: The caps to restrict the output of the track to.
186 * Creates a new #GESTrack with the given @type and @caps.
188 * The newly created track will steal a reference to the caps. If you wish to
189 * use those caps elsewhere, you will have to take an extra reference.
191 * Returns: A new #GESTrack.
194 ges_track_new (GESTrackType type, GstCaps * caps)
198 track = g_object_new (GES_TYPE_TRACK, "caps", caps, "track-type", type, NULL);
199 gst_caps_unref (caps);
205 * ges_track_video_raw_new:
207 * Creates a new #GESTrack of type #GES_TRACK_TYPE_VIDEO and with generic
208 * raw video caps ("video/x-raw-yuv;video/x-raw-rgb");
210 * Returns: A new #GESTrack.
213 ges_track_video_raw_new (void)
216 GstCaps *caps = gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb");
218 track = ges_track_new (GES_TRACK_TYPE_VIDEO, caps);
224 * ges_track_audio_raw_new:
226 * Creates a new #GESTrack of type #GES_TRACK_TYPE_AUDIO and with generic
227 * raw audio caps ("audio/x-raw-int;audio/x-raw-float");
229 * Returns: A new #GESTrack.
232 ges_track_audio_raw_new (void)
235 GstCaps *caps = gst_caps_from_string ("audio/x-raw-int;audio/x-raw-float");
237 track = ges_track_new (GES_TRACK_TYPE_AUDIO, caps);
243 ges_track_set_timeline (GESTrack * track, GESTimeline * timeline)
245 GST_DEBUG ("track:%p, timeline:%p", track, timeline);
247 track->timeline = timeline;
251 * ges_track_set_caps:
252 * @track: a #GESTrack
253 * @caps: the #GstCaps to set
255 * Sets the given @caps on the track.
258 ges_track_set_caps (GESTrack * track, const GstCaps * caps)
260 GST_DEBUG ("track:%p, caps:%" GST_PTR_FORMAT, track, caps);
262 g_return_if_fail (GST_IS_CAPS (caps));
265 gst_caps_unref (track->caps);
266 track->caps = gst_caps_copy (caps);
268 g_object_set (track->composition, "caps", caps, NULL);
269 /* FIXME : update all trackobjects ? */
273 * ges_track_add_object:
274 * @track: a #GESTrack
275 * @object: the #GESTrackObject to add
277 * Adds the given object to the track.
279 * Returns: #TRUE if the object was properly added. #FALSE if the track does not
280 * want to accept the object.
283 ges_track_add_object (GESTrack * track, GESTrackObject * object)
285 GST_DEBUG ("track:%p, object:%p", track, object);
287 if (G_UNLIKELY (object->track != NULL)) {
288 GST_WARNING ("Object already belongs to another track");
292 if (G_UNLIKELY (object->gnlobject != NULL)) {
293 GST_ERROR ("TrackObject doesn't have a gnlobject !");
297 if (G_UNLIKELY (!ges_track_object_set_track (object, track))) {
298 GST_ERROR ("Couldn't properly add the object to the Track");
302 GST_DEBUG ("Adding object to ourself");
304 /* make sure the object has a valid gnlobject ! */
305 if (G_UNLIKELY (!gst_bin_add (GST_BIN (track->composition),
306 object->gnlobject))) {
307 GST_WARNING ("Couldn't add object to the GnlComposition");
311 track->trackobjects = g_list_append (track->trackobjects, object);
317 * ges_track_remove_object:
318 * @track: a #GESTrack
319 * @object: the #GESTrackObject to remove
321 * Removes the object from the track.
323 * Returns: #TRUE if the object was removed, else #FALSE if the track
324 * could not remove the object (like if it didn't belong to the track).
327 ges_track_remove_object (GESTrack * track, GESTrackObject * object)
329 GST_DEBUG ("track:%p, object:%p", track, object);
331 if (G_UNLIKELY (object->track != track)) {
332 GST_WARNING ("Object belongs to another track");
336 if (G_LIKELY (object->gnlobject != NULL)) {
337 GST_DEBUG ("Removing GnlObject from composition");
338 if (!gst_bin_remove (GST_BIN (track->composition), object->gnlobject)) {
339 GST_WARNING ("Failed to remove gnlobject from composition");
344 ges_track_object_set_track (object, NULL);
345 track->trackobjects = g_list_remove (track->trackobjects, object);
351 pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track)
353 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
356 track->srcpad = gst_ghost_pad_new ("src", pad);
358 gst_pad_set_active (track->srcpad, TRUE);
360 gst_element_add_pad (GST_ELEMENT (track), track->srcpad);
366 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track)
368 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
370 if (G_LIKELY (track->srcpad)) {
371 gst_pad_set_active (track->srcpad, FALSE);
372 gst_element_remove_pad (GST_ELEMENT (track), track->srcpad);
373 track->srcpad = NULL;