1 /* GStreamer Editing Services
2 * Copyright (C) 2009 Edward Hervey <bilboed@bilboed.com>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
22 * @short_description: Composition of objects
24 * Corresponds to one output format (i.e. audio OR video).
26 * Contains the compatible TrackObject(s).
28 * Wraps GNonLin's 'gnlcomposition' element.
31 #include "ges-internal.h"
32 #include "ges-track.h"
33 #include "ges-track-object.h"
35 G_DEFINE_TYPE (GESTrack, ges_track, GST_TYPE_BIN);
44 static void pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track);
47 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track);
49 #define C_ENUM(v) ((gint) v)
51 register_ges_track_type_select_result (GType * id)
53 static const GEnumValue values[] = {
54 {C_ENUM (GES_TRACK_TYPE_AUDIO), "GES_TRACK_TYPE_AUDIO", "audio"},
55 {C_ENUM (GES_TRACK_TYPE_VIDEO), "GES_TRACK_TYPE_VIDEO", "video"},
56 {C_ENUM (GES_TRACK_TYPE_TEXT), "GES_TRACK_TYPE_TEXT", "text"},
57 {C_ENUM (GES_TRACK_TYPE_CUSTOM), "GES_TRACK_TYPE_CUSTOM", "custom"},
61 *id = g_enum_register_static ("GESTrackType", values);
65 ges_track_type_get_type (void)
68 static GOnce once = G_ONCE_INIT;
70 g_once (&once, (GThreadFunc) register_ges_track_type_select_result, &id);
75 ges_track_get_property (GObject * object, guint property_id,
76 GValue * value, GParamSpec * pspec)
78 GESTrack *track = GES_TRACK (object);
80 switch (property_id) {
82 gst_value_set_caps (value, track->caps);
85 g_value_set_enum (value, track->type);
88 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
93 ges_track_set_property (GObject * object, guint property_id,
94 const GValue * value, GParamSpec * pspec)
96 GESTrack *track = GES_TRACK (object);
98 switch (property_id) {
100 ges_track_set_caps (track, gst_value_get_caps (value));
103 track->type = g_value_get_enum (value);
106 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
111 ges_track_dispose (GObject * object)
113 GESTrack *track = (GESTrack *) object;
115 /* FIXME : Remove all TrackObjects ! */
117 if (track->composition) {
118 gst_bin_remove (GST_BIN (object), track->composition);
119 track->composition = NULL;
123 gst_caps_unref (track->caps);
127 G_OBJECT_CLASS (ges_track_parent_class)->dispose (object);
131 ges_track_finalize (GObject * object)
133 G_OBJECT_CLASS (ges_track_parent_class)->finalize (object);
137 ges_track_class_init (GESTrackClass * klass)
139 GObjectClass *object_class = G_OBJECT_CLASS (klass);
141 object_class->get_property = ges_track_get_property;
142 object_class->set_property = ges_track_set_property;
143 object_class->dispose = ges_track_dispose;
144 object_class->finalize = ges_track_finalize;
149 * Caps used to filter/choose the output stream. This is generally set to
150 * a generic set of caps like 'video/x-raw-rgb;video/x-raw-yuv' for raw video.
152 * Default value: #GST_CAPS_ANY.
154 g_object_class_install_property (object_class, ARG_CAPS,
155 g_param_spec_boxed ("caps", "Caps",
156 "Caps used to filter/choose the output stream",
157 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
160 * GESTrack:track-type
162 * Type of stream the track outputs. This is used when creating the #GESTrack
163 * to specify in generic terms what type of content will be outputted.
165 * It also serves as a 'fast' way to check what type of data will be outputted
166 * from the #GESTrack without having to actually check the #GESTrack's caps
169 g_object_class_install_property (object_class, ARG_TYPE,
170 g_param_spec_enum ("track-type", "TrackType",
171 "Type of stream the track outputs",
172 GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_CUSTOM,
173 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
177 ges_track_init (GESTrack * self)
179 self->composition = gst_element_factory_make ("gnlcomposition", NULL);
181 g_signal_connect (self->composition, "pad-added", (GCallback) pad_added_cb,
183 g_signal_connect (self->composition, "pad-removed",
184 (GCallback) pad_removed_cb, self);
186 if (!gst_bin_add (GST_BIN (self), self->composition))
187 GST_ERROR ("Couldn't add composition to bin !");
192 * @type: The type of track
193 * @caps: The caps to restrict the output of the track to.
195 * Creates a new #GESTrack with the given @type and @caps.
197 * The newly created track will steal a reference to the caps. If you wish to
198 * use those caps elsewhere, you will have to take an extra reference.
200 * Returns: A new #GESTrack.
203 ges_track_new (GESTrackType type, GstCaps * caps)
207 track = g_object_new (GES_TYPE_TRACK, "caps", caps, "track-type", type, NULL);
208 gst_caps_unref (caps);
214 * ges_track_video_raw_new:
216 * Creates a new #GESTrack of type #GES_TRACK_TYPE_VIDEO and with generic
217 * raw video caps ("video/x-raw-yuv;video/x-raw-rgb");
219 * Returns: A new #GESTrack.
222 ges_track_video_raw_new ()
225 GstCaps *caps = gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb");
227 track = ges_track_new (GES_TRACK_TYPE_VIDEO, caps);
233 * ges_track_audio_raw_new:
235 * Creates a new #GESTrack of type #GES_TRACK_TYPE_AUDIO and with generic
236 * raw audio caps ("audio/x-raw-int;audio/x-raw-float");
238 * Returns: A new #GESTrack.
241 ges_track_audio_raw_new ()
244 GstCaps *caps = gst_caps_from_string ("audio/x-raw-int;audio/x-raw-float");
246 track = ges_track_new (GES_TRACK_TYPE_AUDIO, caps);
252 ges_track_set_timeline (GESTrack * track, GESTimeline * timeline)
254 GST_DEBUG ("track:%p, timeline:%p", track, timeline);
256 track->timeline = timeline;
260 * ges_track_set_caps:
261 * @track: a #GESTrack
262 * @caps: the #GstCaps to set
264 * Sets the given @caps on the track.
267 ges_track_set_caps (GESTrack * track, const GstCaps * caps)
269 GST_DEBUG ("track:%p, caps:%" GST_PTR_FORMAT, track, caps);
271 g_return_if_fail (GST_IS_CAPS (caps));
274 gst_caps_unref (track->caps);
275 track->caps = gst_caps_copy (caps);
277 /* FIXME : update all trackobjects ? */
281 * ges_track_add_object:
282 * @track: a #GESTrack
283 * @object: the #GESTrackObject to add
285 * Adds the given object to the track.
287 * Returns: #TRUE if the object was properly added. #FALSE if the track does not
288 * want to accept the object.
291 ges_track_add_object (GESTrack * track, GESTrackObject * object)
293 GST_DEBUG ("track:%p, object:%p", track, object);
295 if (G_UNLIKELY (object->track != NULL)) {
296 GST_WARNING ("Object already belongs to another track");
300 if (G_UNLIKELY (object->gnlobject != NULL)) {
301 GST_ERROR ("TrackObject doesn't have a gnlobject !");
305 if (G_UNLIKELY (!ges_track_object_set_track (object, track))) {
306 GST_ERROR ("Couldn't properly add the object to the Track");
310 GST_DEBUG ("Adding object to ourself");
312 /* make sure the object has a valid gnlobject ! */
313 if (G_UNLIKELY (!gst_bin_add (GST_BIN (track->composition),
314 object->gnlobject))) {
315 GST_WARNING ("Couldn't add object to the GnlComposition");
323 * ges_track_remove_object:
324 * @track: a #GESTrack
325 * @object: the #GESTrackObject to remove
327 * Removes the object from the track.
329 * Returns: #TRUE if the object was removed, else #FALSE if the track
330 * could not remove the object (like if it didn't belong to the track).
333 ges_track_remove_object (GESTrack * track, GESTrackObject * object)
335 GST_DEBUG ("track:%p, object:%p", track, object);
337 if (G_UNLIKELY (object->track != track)) {
338 GST_WARNING ("Object belongs to another track");
342 if (G_LIKELY (object->gnlobject != NULL)) {
343 GST_DEBUG ("Removing GnlObject from composition");
344 if (!gst_bin_remove (GST_BIN (track->composition), object->gnlobject)) {
345 GST_WARNING ("Failed to remove gnlobject from composition");
350 ges_track_object_set_track (object, NULL);
356 pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track)
358 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
361 track->srcpad = gst_ghost_pad_new ("src", pad);
363 gst_pad_set_active (track->srcpad, TRUE);
365 gst_element_add_pad (GST_ELEMENT (track), track->srcpad);
371 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track)
373 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
375 if (G_LIKELY (track->srcpad)) {
376 gst_pad_set_active (track->srcpad, FALSE);
377 gst_element_remove_pad (GST_ELEMENT (track), track->srcpad);
378 track->srcpad = NULL;