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);
45 static void pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track);
48 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track);
50 #define C_ENUM(v) ((gint) v)
52 register_ges_track_type_select_result (GType * id)
54 static const GEnumValue values[] = {
55 {C_ENUM (GES_TRACK_TYPE_AUDIO), "GES_TRACK_TYPE_AUDIO", "audio"},
56 {C_ENUM (GES_TRACK_TYPE_VIDEO), "GES_TRACK_TYPE_VIDEO", "video"},
57 {C_ENUM (GES_TRACK_TYPE_TEXT), "GES_TRACK_TYPE_TEXT", "text"},
58 {C_ENUM (GES_TRACK_TYPE_CUSTOM), "GES_TRACK_TYPE_CUSTOM", "custom"},
62 *id = g_enum_register_static ("GESTrackType", values);
66 ges_track_type_get_type (void)
69 static GOnce once = G_ONCE_INIT;
71 g_once (&once, (GThreadFunc) register_ges_track_type_select_result, &id);
76 ges_track_get_property (GObject * object, guint property_id,
77 GValue * value, GParamSpec * pspec)
79 GESTrack *track = GES_TRACK (object);
81 switch (property_id) {
83 gst_value_set_caps (value, track->caps);
86 g_value_set_enum (value, track->type);
89 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
94 ges_track_set_property (GObject * object, guint property_id,
95 const GValue * value, GParamSpec * pspec)
97 GESTrack *track = GES_TRACK (object);
99 switch (property_id) {
101 ges_track_set_caps (track, gst_value_get_caps (value));
104 track->type = g_value_get_enum (value);
107 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
112 ges_track_dispose (GObject * object)
114 GESTrack *track = (GESTrack *) object;
116 /* FIXME : Remove all TrackObjects ! */
118 if (track->composition) {
119 gst_bin_remove (GST_BIN (object), track->composition);
120 track->composition = NULL;
124 gst_caps_unref (track->caps);
128 G_OBJECT_CLASS (ges_track_parent_class)->dispose (object);
132 ges_track_finalize (GObject * object)
134 G_OBJECT_CLASS (ges_track_parent_class)->finalize (object);
138 ges_track_class_init (GESTrackClass * klass)
140 GObjectClass *object_class = G_OBJECT_CLASS (klass);
142 object_class->get_property = ges_track_get_property;
143 object_class->set_property = ges_track_set_property;
144 object_class->dispose = ges_track_dispose;
145 object_class->finalize = ges_track_finalize;
150 * Caps used to filter/choose the output stream. This is generally set to
151 * a generic set of caps like 'video/x-raw-rgb;video/x-raw-yuv' for raw video.
153 * Default value: #GST_CAPS_ANY.
155 g_object_class_install_property (object_class, ARG_CAPS,
156 g_param_spec_boxed ("caps", "Caps",
157 "Caps used to filter/choose the output stream",
158 GST_TYPE_CAPS, G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
161 * GESTrack:track-type
163 * Type of stream the track outputs. This is used when creating the #GESTrack
164 * to specify in generic terms what type of content will be outputted.
166 * It also serves as a 'fast' way to check what type of data will be outputted
167 * from the #GESTrack without having to actually check the #GESTrack's caps
170 g_object_class_install_property (object_class, ARG_TYPE,
171 g_param_spec_enum ("track-type", "TrackType",
172 "Type of stream the track outputs",
173 GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_CUSTOM,
174 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
178 ges_track_init (GESTrack * self)
180 self->composition = gst_element_factory_make ("gnlcomposition", NULL);
182 g_signal_connect (self->composition, "pad-added", (GCallback) pad_added_cb,
184 g_signal_connect (self->composition, "pad-removed",
185 (GCallback) pad_removed_cb, self);
187 if (!gst_bin_add (GST_BIN (self), self->composition))
188 GST_ERROR ("Couldn't add composition to bin !");
193 * @type: The type of track
194 * @caps: The caps to restrict the output of the track to.
196 * Creates a new #GESTrack with the given @type and @caps.
198 * The newly created track will steal a reference to the caps. If you wish to
199 * use those caps elsewhere, you will have to take an extra reference.
201 * Returns: A new #GESTrack.
204 ges_track_new (GESTrackType type, GstCaps * caps)
208 track = g_object_new (GES_TYPE_TRACK, "caps", caps, "track-type", type, NULL);
209 gst_caps_unref (caps);
215 * ges_track_video_raw_new:
217 * Creates a new #GESTrack of type #GES_TRACK_TYPE_VIDEO and with generic
218 * raw video caps ("video/x-raw-yuv;video/x-raw-rgb");
220 * Returns: A new #GESTrack.
223 ges_track_video_raw_new ()
226 GstCaps *caps = gst_caps_from_string ("video/x-raw-yuv;video/x-raw-rgb");
228 track = ges_track_new (GES_TRACK_TYPE_VIDEO, caps);
234 * ges_track_audio_raw_new:
236 * Creates a new #GESTrack of type #GES_TRACK_TYPE_AUDIO and with generic
237 * raw audio caps ("audio/x-raw-int;audio/x-raw-float");
239 * Returns: A new #GESTrack.
242 ges_track_audio_raw_new ()
245 GstCaps *caps = gst_caps_from_string ("audio/x-raw-int;audio/x-raw-float");
247 track = ges_track_new (GES_TRACK_TYPE_AUDIO, caps);
253 ges_track_set_timeline (GESTrack * track, GESTimeline * timeline)
255 GST_DEBUG ("track:%p, timeline:%p", track, timeline);
257 track->timeline = timeline;
261 * ges_track_set_caps:
262 * @track: a #GESTrack
263 * @caps: the #GstCaps to set
265 * Sets the given @caps on the track.
268 ges_track_set_caps (GESTrack * track, const GstCaps * caps)
270 GST_DEBUG ("track:%p, caps:%" GST_PTR_FORMAT, track, caps);
272 g_return_if_fail (GST_IS_CAPS (caps));
275 gst_caps_unref (track->caps);
276 track->caps = gst_caps_copy (caps);
278 g_object_set (track->composition, "caps", caps, NULL);
279 /* FIXME : update all trackobjects ? */
283 * ges_track_add_object:
284 * @track: a #GESTrack
285 * @object: the #GESTrackObject to add
287 * Adds the given object to the track.
289 * Returns: #TRUE if the object was properly added. #FALSE if the track does not
290 * want to accept the object.
293 ges_track_add_object (GESTrack * track, GESTrackObject * object)
295 GST_DEBUG ("track:%p, object:%p", track, object);
297 if (G_UNLIKELY (object->track != NULL)) {
298 GST_WARNING ("Object already belongs to another track");
302 if (G_UNLIKELY (object->gnlobject != NULL)) {
303 GST_ERROR ("TrackObject doesn't have a gnlobject !");
307 if (G_UNLIKELY (!ges_track_object_set_track (object, track))) {
308 GST_ERROR ("Couldn't properly add the object to the Track");
312 GST_DEBUG ("Adding object to ourself");
314 /* make sure the object has a valid gnlobject ! */
315 if (G_UNLIKELY (!gst_bin_add (GST_BIN (track->composition),
316 object->gnlobject))) {
317 GST_WARNING ("Couldn't add object to the GnlComposition");
325 * ges_track_remove_object:
326 * @track: a #GESTrack
327 * @object: the #GESTrackObject to remove
329 * Removes the object from the track.
331 * Returns: #TRUE if the object was removed, else #FALSE if the track
332 * could not remove the object (like if it didn't belong to the track).
335 ges_track_remove_object (GESTrack * track, GESTrackObject * object)
337 GST_DEBUG ("track:%p, object:%p", track, object);
339 if (G_UNLIKELY (object->track != track)) {
340 GST_WARNING ("Object belongs to another track");
344 if (G_LIKELY (object->gnlobject != NULL)) {
345 GST_DEBUG ("Removing GnlObject from composition");
346 if (!gst_bin_remove (GST_BIN (track->composition), object->gnlobject)) {
347 GST_WARNING ("Failed to remove gnlobject from composition");
352 ges_track_object_set_track (object, NULL);
358 pad_added_cb (GstElement * element, GstPad * pad, GESTrack * track)
360 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
363 track->srcpad = gst_ghost_pad_new ("src", pad);
365 gst_pad_set_active (track->srcpad, TRUE);
367 gst_element_add_pad (GST_ELEMENT (track), track->srcpad);
373 pad_removed_cb (GstElement * element, GstPad * pad, GESTrack * track)
375 GST_DEBUG ("track:%p, pad %s:%s", track, GST_DEBUG_PAD_NAME (pad));
377 if (G_LIKELY (track->srcpad)) {
378 gst_pad_set_active (track->srcpad, FALSE);
379 gst_element_remove_pad (GST_ELEMENT (track), track->srcpad);
380 track->srcpad = NULL;