2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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.
21 * SECTION:element-playbin
25 * Playbin provides a stand-alone everything-in-one abstraction for an
26 * audio and/or video player.
29 * It can handle both audio and video files and features
32 * automatic file type recognition and based on that automatic
33 * selection and usage of the right audio/video/subtitle demuxers/decoders
36 * visualisations for audio files
39 * subtitle support for video files
42 * stream selection between different audio/subtitles streams
45 * meta info (tag) extraction
48 * easy access to the last video frame
51 * buffering when playing streams over a network
58 * <title>Usage</title>
60 * A playbin element can be created just like any other element using
61 * gst_element_factory_make(). The file/URI to play should be set via the "uri"
62 * property. This must be an absolute URI, relative file paths are not allowed.
63 * Example URIs are file:///home/joe/movie.avi or http://www.joedoe.com/foo.ogg
66 * Playbin is a #GstPipeline. It will notify the application of everything
67 * that's happening (errors, end of stream, tags found, state changes, etc.)
68 * by posting messages on its #GstBus. The application needs to watch the
72 * Playback can be initiated by setting the element to PLAYING state using
73 * gst_element_set_state(). Note that the state change will take place in
74 * the background in a separate thread, when the function returns playback
75 * is probably not happening yet and any errors might not have occured yet.
76 * Applications using playbin should ideally be written to deal with things
77 * completely asynchroneous.
80 * When playback has finished (an EOS message has been received on the bus)
81 * or an error has occured (an ERROR message has been received on the bus) or
82 * the user wants to play a different track, playbin should be set back to
83 * READY or NULL state, then the "uri" property should be set to the new
84 * location and then playbin be set to PLAYING state again.
87 * Seeking can be done using gst_element_seek_simple() or gst_element_seek()
88 * on the playbin element. Again, the seek will not be executed
89 * instantaneously, but will be done in a background thread. When the seek
90 * call returns the seek will most likely still be in process. An application
91 * may wait for the seek to finish (or fail) using gst_element_get_state() with
92 * -1 as the timeout, but this will block the user interface and is not
96 * Applications may query the current position and duration of the stream
97 * via gst_element_query_position() and gst_element_query_duration() and
98 * setting the format passed to GST_FORMAT_TIME. If the query was successful,
99 * the duration or position will have been returned in units of nanoseconds.
101 * <title>Advanced Usage: specifying the audio and video sink</title>
103 * By default, if no audio sink or video sink has been specified via the
104 * "audio-sink" or "video-sink" property, playbin will use the autoaudiosink
105 * and autovideosink elements to find the first-best available output method.
106 * This should work in most cases, but is not always desirable. Often either
107 * the user or application might want to specify more explicitly what to use
108 * for audio and video output.
111 * If the application wants more control over how audio or video should be
112 * output, it may create the audio/video sink elements itself (for example
113 * using gst_element_factory_make()) and provide them to playbin using the
114 * "audio-sink" or "video-sink" property.
117 * GNOME-based applications, for example, will usually want to create
118 * gconfaudiosink and gconfvideosink elements and make playbin use those,
119 * so that output happens to whatever the user has configured in the GNOME
120 * Multimedia System Selector confinguration dialog.
123 * The sink elements do not necessarily need to be ready-made sinks. It is
124 * possible to create container elements that look like a sink to playbin,
125 * but in reality contain a number of custom elements linked together. This
126 * can be achieved by creating a #GstBin and putting elements in there and
127 * linking them, and then creating a sink #GstGhostPad for the bin and pointing
128 * it to the sink pad of the first element within the bin. This can be used
129 * for a number of purposes, for example to force output to a particular
130 * format or to modify or observe the data before it is output.
133 * It is also possible to 'suppress' audio and/or video output by using
134 * 'fakesink' elements (or capture it from there using the fakesink element's
135 * "handoff" signal, which, nota bene, is fired from the streaming thread!).
137 * <title>Retrieving Tags and Other Meta Data</title>
139 * Most of the common meta data (artist, title, etc.) can be retrieved by
140 * watching for TAG messages on the pipeline's bus (see above).
143 * Other more specific meta information like width/height/framerate of video
144 * streams or samplerate/number of channels of audio streams can be obtained
145 * using the "stream-info" property, which will return a GList of stream info
146 * objects, one for each stream. These are opaque objects that can only be
147 * accessed via the standard GObject property interface, ie. g_object_get().
148 * Each stream info object has the following properties:
150 * <listitem>"object" (GstObject) (the decoder source pad usually)</listitem>
151 * <listitem>"type" (enum) (if this is an audio/video/subtitle stream)</listitem>
152 * <listitem>"decoder" (string) (name of decoder used to decode this stream)</listitem>
153 * <listitem>"mute" (boolean) (to mute or unmute this stream)</listitem>
154 * <listitem>"caps" (GstCaps) (caps of the decoded stream)</listitem>
155 * <listitem>"language-code" (string) (ISO-639 language code for this stream, mostly used for audio/subtitle streams)</listitem>
156 * <listitem>"codec" (string) (format this stream was encoded in)</listitem>
158 * Stream information from the stream-info properties is best queried once
159 * playbin has changed into PAUSED or PLAYING state (which can be detected
160 * via a state-changed message on the bus where old_state=READY and
161 * new_state=PAUSED), since before that the list might not be complete yet or
162 * not contain all available information (like language-codes).
164 * <title>Buffering status</title>
166 * Playbin handles buffering automatically. When playbin is buffering, it
167 * will post BUFFERING messages on the bus with a percentage value that
168 * shows the progress of the buffering. Applications may want to show this
169 * information to the user in some form or another. Here is how to extract
170 * the percentage information from the message:
174 * switch (GST_MESSAGE_TYPE (msg)) {
175 * case GST_MESSAGE_BUFFERING: {
177 * gst_structure_get_int (msg->structure, "buffer-percent", &percent);
178 * g_print ("Buffering (%%u percent done)", percent);
184 * Note that application should keep the pipeline in the PAUSED state when a
185 * GST_MESSAGE_BUFFERING message is received with a buffer-percent < 100.
187 * <title>Embedding the video window in your application</title>
189 * By default, playbin (or rather the video sinks used) will create their own
190 * window. Applications will usually want to force output to a window of their
191 * own, however. This can be done using the GstXOverlay interface, which most
192 * video sinks implement. See the documentation there for more details.
194 * <title>Specifying which CD/DVD device to use</title>
196 * The device to use for CDs/DVDs needs to be set on the source element
197 * playbin creates before it is opened. The only way to do this at the moment
198 * is to connect to playbin's "notify::source" signal, which will be emitted
199 * by playbin when it has created the source element for a particular URI.
200 * In the signal callback you can check if the source element has a "device"
201 * property and set it appropriately. In future ways might be added to specify
202 * the device as part of the URI, but at the time of writing this is not
205 * <title>Examples</title>
207 * Here is a simple pipeline to play back a video or audio file:
209 * gst-launch -v playbin uri=file:///path/to/somefile.avi
211 * This will play back the given AVI video file, given that the video and
212 * audio decoders required to decode the content are installed. Since no
213 * special audio sink or video sink is supplied (not possible via gst-launch),
214 * playbin will try to find a suitable audio and video sink automatically
215 * using the autoaudiosink and autovideosink elements.
218 * Here is a another pipeline to play track 4 of an audio CD:
220 * gst-launch -v playbin uri=cdda://4
222 * This will play back track 4 on an audio CD in your disc drive (assuming
223 * the drive is detected automatically by the plugin).
226 * Here is a another pipeline to play title 1 of a DVD:
228 * gst-launch -v playbin uri=dvd://1
230 * This will play back title 1 of a DVD in your disc drive (assuming
231 * the drive is detected automatically by the plugin).
243 #include <gst/gst-i18n-plugin.h>
244 #include <gst/utils/base-utils.h>
246 #include "gstplaybasebin.h"
248 GST_DEBUG_CATEGORY_STATIC (gst_play_bin_debug);
249 #define GST_CAT_DEFAULT gst_play_bin_debug
251 #define GST_TYPE_PLAY_BIN (gst_play_bin_get_type())
252 #define GST_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PLAY_BIN,GstPlayBin))
253 #define GST_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PLAY_BIN,GstPlayBinClass))
254 #define GST_IS_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PLAY_BIN))
255 #define GST_IS_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PLAY_BIN))
257 #define VOLUME_MAX_DOUBLE 10.0
258 #define CONNECTION_SPEED_DEFAULT 0
260 typedef struct _GstPlayBin GstPlayBin;
261 typedef struct _GstPlayBinClass GstPlayBinClass;
265 GstPlayBaseBin parent;
267 /* the configurable elements */
268 GstElement *fakesink;
269 GstElement *audio_sink;
270 GstElement *video_sink;
271 GstElement *visualisation;
272 GstElement *pending_visualisation;
273 GstElement *volume_element;
274 GstElement *textoverlay_element;
277 /* these are the currently active sinks */
280 /* the last captured frame for snapshots */
283 /* our cache for the sinks */
286 /* font description */
289 /* connection speed in bits/sec (0 = unknown) */
290 guint connection_speed;
292 /* indication if the pipeline is live */
296 struct _GstPlayBinClass
298 GstPlayBaseBinClass parent_class;
320 static void gst_play_bin_class_init (GstPlayBinClass * klass);
321 static void gst_play_bin_init (GstPlayBin * play_bin);
322 static void gst_play_bin_dispose (GObject * object);
324 static gboolean setup_sinks (GstPlayBaseBin * play_base_bin,
325 GstPlayBaseGroup * group);
326 static void remove_sinks (GstPlayBin * play_bin);
328 static void gst_play_bin_set_property (GObject * object, guint prop_id,
329 const GValue * value, GParamSpec * spec);
330 static void gst_play_bin_get_property (GObject * object, guint prop_id,
331 GValue * value, GParamSpec * spec);
333 static gboolean gst_play_bin_send_event (GstElement * element,
335 static gboolean gst_play_bin_set_clock_func (GstElement * element,
337 static GstStateChangeReturn gst_play_bin_change_state (GstElement * element,
338 GstStateChange transition);
340 static void gst_play_bin_handle_message (GstBin * bin, GstMessage * message);
342 static GstElementClass *parent_class;
344 //static guint gst_play_bin_signals[LAST_SIGNAL] = { 0 };
346 static const GstElementDetails gst_play_bin_details =
347 GST_ELEMENT_DETAILS ("Player Bin",
348 "Generic/Bin/Player",
349 "Autoplug and play media from an uri",
350 "Wim Taymans <wim@fluendo.com>");
353 gst_play_bin_get_type (void)
355 static GType gst_play_bin_type = 0;
357 if (!gst_play_bin_type) {
358 static const GTypeInfo gst_play_bin_info = {
359 sizeof (GstPlayBinClass),
362 (GClassInitFunc) gst_play_bin_class_init,
367 (GInstanceInitFunc) gst_play_bin_init,
371 gst_play_bin_type = g_type_register_static (GST_TYPE_PLAY_BASE_BIN,
372 "GstPlayBin", &gst_play_bin_info, 0);
375 return gst_play_bin_type;
379 gst_play_bin_class_init (GstPlayBinClass * klass)
381 GObjectClass *gobject_klass;
382 GstElementClass *gstelement_klass;
383 GstBinClass *gstbin_klass;
384 GstPlayBaseBinClass *playbasebin_klass;
386 gobject_klass = (GObjectClass *) klass;
387 gstelement_klass = (GstElementClass *) klass;
388 gstbin_klass = (GstBinClass *) klass;
389 playbasebin_klass = (GstPlayBaseBinClass *) klass;
391 parent_class = g_type_class_peek_parent (klass);
393 gobject_klass->set_property = gst_play_bin_set_property;
394 gobject_klass->get_property = gst_play_bin_get_property;
396 g_object_class_install_property (gobject_klass, ARG_VIDEO_SINK,
397 g_param_spec_object ("video-sink", "Video Sink",
398 "the video output element to use (NULL = default sink)",
399 GST_TYPE_ELEMENT, G_PARAM_READWRITE));
400 g_object_class_install_property (gobject_klass, ARG_AUDIO_SINK,
401 g_param_spec_object ("audio-sink", "Audio Sink",
402 "the audio output element to use (NULL = default sink)",
403 GST_TYPE_ELEMENT, G_PARAM_READWRITE));
404 g_object_class_install_property (gobject_klass, ARG_VIS_PLUGIN,
405 g_param_spec_object ("vis-plugin", "Vis plugin",
406 "the visualization element to use (NULL = none)",
407 GST_TYPE_ELEMENT, G_PARAM_READWRITE));
408 g_object_class_install_property (gobject_klass, ARG_VOLUME,
409 g_param_spec_double ("volume", "volume", "volume",
410 0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE));
411 g_object_class_install_property (gobject_klass, ARG_FRAME,
412 gst_param_spec_mini_object ("frame", "Frame",
413 "The last frame (NULL = no video available)",
414 GST_TYPE_BUFFER, G_PARAM_READABLE));
415 g_object_class_install_property (gobject_klass, ARG_FONT_DESC,
416 g_param_spec_string ("subtitle-font-desc",
417 "Subtitle font description",
418 "Pango font description of font "
419 "to be used for subtitle rendering", NULL, G_PARAM_WRITABLE));
421 * GstPlayBin::connection-speed
423 * Network connection speed in kbps (0 = unknown)
427 g_object_class_install_property (gobject_klass, ARG_CONNECTION_SPEED,
428 g_param_spec_uint ("connection-speed", "Connection Speed",
429 "Network connection speed in kbps (0 = unknown)",
430 0, G_MAXUINT, CONNECTION_SPEED_DEFAULT, G_PARAM_READWRITE));
432 gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_play_bin_dispose);
434 gst_element_class_set_details (gstelement_klass, &gst_play_bin_details);
436 gstelement_klass->change_state =
437 GST_DEBUG_FUNCPTR (gst_play_bin_change_state);
438 gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_bin_send_event);
439 gstelement_klass->set_clock = GST_DEBUG_FUNCPTR (gst_play_bin_set_clock_func);
441 gstbin_klass->handle_message =
442 GST_DEBUG_FUNCPTR (gst_play_bin_handle_message);
444 playbasebin_klass->setup_output_pads = setup_sinks;
448 gst_play_bin_init (GstPlayBin * play_bin)
450 play_bin->video_sink = NULL;
451 play_bin->audio_sink = NULL;
452 play_bin->visualisation = NULL;
453 play_bin->pending_visualisation = NULL;
454 play_bin->volume_element = NULL;
455 play_bin->textoverlay_element = NULL;
456 play_bin->volume = 1.0;
457 play_bin->sinks = NULL;
458 play_bin->frame = NULL;
459 play_bin->font_desc = NULL;
460 play_bin->cache = g_hash_table_new_full (g_str_hash, g_str_equal,
461 NULL, (GDestroyNotify) gst_object_unref);
465 gst_play_bin_dispose (GObject * object)
467 GstPlayBin *play_bin;
469 play_bin = GST_PLAY_BIN (object);
471 if (play_bin->cache != NULL) {
472 remove_sinks (play_bin);
473 g_hash_table_destroy (play_bin->cache);
474 play_bin->cache = NULL;
477 if (play_bin->audio_sink != NULL) {
478 gst_element_set_state (play_bin->audio_sink, GST_STATE_NULL);
479 gst_object_unref (play_bin->audio_sink);
480 play_bin->audio_sink = NULL;
482 if (play_bin->video_sink != NULL) {
483 gst_element_set_state (play_bin->video_sink, GST_STATE_NULL);
484 gst_object_unref (play_bin->video_sink);
485 play_bin->video_sink = NULL;
487 if (play_bin->visualisation != NULL) {
488 gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
489 gst_object_unref (play_bin->visualisation);
490 play_bin->visualisation = NULL;
492 if (play_bin->pending_visualisation != NULL) {
493 gst_element_set_state (play_bin->pending_visualisation, GST_STATE_NULL);
494 gst_object_unref (play_bin->pending_visualisation);
495 play_bin->pending_visualisation = NULL;
497 if (play_bin->textoverlay_element != NULL) {
498 gst_object_unref (play_bin->textoverlay_element);
499 play_bin->textoverlay_element = NULL;
501 g_free (play_bin->font_desc);
502 play_bin->font_desc = NULL;
504 G_OBJECT_CLASS (parent_class)->dispose (object);
508 gst_play_bin_vis_unblocked (GstPad * tee_pad, gboolean blocked,
515 gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked,
518 GstPlayBin *play_bin = GST_PLAY_BIN (user_data);
519 GstBin *vis_bin = NULL;
520 GstPad *vis_sink_pad = NULL, *vis_src_pad = NULL, *vqueue_pad = NULL;
523 /* We want to disable visualisation */
524 if (!GST_IS_ELEMENT (play_bin->pending_visualisation)) {
525 /* Set visualisation element to READY */
526 gst_element_set_state (play_bin->visualisation, GST_STATE_READY);
531 GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin->
534 if (!GST_IS_BIN (vis_bin) || !GST_IS_PAD (tee_pad)) {
538 vis_src_pad = gst_element_get_pad (play_bin->visualisation, "src");
539 vis_sink_pad = gst_pad_get_peer (tee_pad);
541 /* Can be fakesink */
542 if (GST_IS_PAD (vis_src_pad)) {
543 vqueue_pad = gst_pad_get_peer (vis_src_pad);
546 if (!GST_IS_PAD (vis_sink_pad)) {
550 /* Check the bin's state */
551 GST_OBJECT_LOCK (vis_bin);
552 bin_state = GST_STATE (vis_bin);
553 GST_OBJECT_UNLOCK (vis_bin);
556 gst_pad_unlink (tee_pad, vis_sink_pad);
557 gst_object_unref (vis_sink_pad);
560 if (GST_IS_PAD (vqueue_pad)) {
561 gst_pad_unlink (vis_src_pad, vqueue_pad);
562 gst_object_unref (vis_src_pad);
566 /* Remove from vis_bin */
567 gst_bin_remove (vis_bin, play_bin->visualisation);
568 /* Set state to NULL */
569 gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
570 /* And loose our ref */
571 gst_object_unref (play_bin->visualisation);
573 if (play_bin->pending_visualisation) {
574 /* Ref this new visualisation element before adding to the bin */
575 gst_object_ref (play_bin->pending_visualisation);
576 /* Add the new one */
577 gst_bin_add (vis_bin, play_bin->pending_visualisation);
578 /* Synchronizing state */
579 gst_element_set_state (play_bin->pending_visualisation, bin_state);
581 vis_sink_pad = gst_element_get_pad (play_bin->pending_visualisation,
583 vis_src_pad = gst_element_get_pad (play_bin->pending_visualisation, "src");
585 if (!GST_IS_PAD (vis_sink_pad) || !GST_IS_PAD (vis_src_pad)) {
590 gst_pad_link (tee_pad, vis_sink_pad);
591 gst_pad_link (vis_src_pad, vqueue_pad);
595 gst_object_unref (play_bin->visualisation);
596 play_bin->visualisation = play_bin->pending_visualisation;
597 play_bin->pending_visualisation = NULL;
601 gst_object_unref (vis_sink_pad);
604 gst_object_unref (vis_src_pad);
607 gst_object_unref (vqueue_pad);
610 gst_object_unref (vis_bin);
613 /* Unblock the pad */
614 gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked,
619 gst_play_bin_set_property (GObject * object, guint prop_id,
620 const GValue * value, GParamSpec * pspec)
622 GstPlayBin *play_bin;
624 play_bin = GST_PLAY_BIN (object);
628 if (play_bin->video_sink != NULL) {
629 gst_object_unref (play_bin->video_sink);
631 play_bin->video_sink = g_value_get_object (value);
632 if (play_bin->video_sink != NULL) {
633 gst_object_ref (play_bin->video_sink);
634 gst_object_sink (GST_OBJECT_CAST (play_bin->video_sink));
636 /* when changing the videosink, we just remove the
637 * video pipeline from the cache so that it will be
638 * regenerated with the new sink element */
639 g_hash_table_remove (play_bin->cache, "vbin");
642 if (play_bin->audio_sink != NULL) {
643 gst_object_unref (play_bin->audio_sink);
645 play_bin->audio_sink = g_value_get_object (value);
646 if (play_bin->audio_sink != NULL) {
647 gst_object_ref (play_bin->audio_sink);
648 gst_object_sink (GST_OBJECT_CAST (play_bin->audio_sink));
650 g_hash_table_remove (play_bin->cache, "abin");
654 /* Do we already have a visualisation change pending ? */
655 if (play_bin->pending_visualisation) {
656 gst_object_unref (play_bin->pending_visualisation);
657 play_bin->pending_visualisation = g_value_get_object (value);
659 if (play_bin->pending_visualisation) {
660 gst_object_ref (play_bin->pending_visualisation);
661 gst_object_sink (GST_OBJECT_CAST (play_bin->pending_visualisation));
664 play_bin->pending_visualisation = g_value_get_object (value);
667 if (play_bin->pending_visualisation) {
668 gst_object_ref (play_bin->pending_visualisation);
669 gst_object_sink (GST_OBJECT_CAST (play_bin->pending_visualisation));
672 /* Was there a visualisation already set ? */
673 if (play_bin->visualisation != NULL) {
674 GstBin *vis_bin = NULL;
677 GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin->
680 /* Check if the visualisation is already in a bin */
681 if (GST_IS_BIN (vis_bin)) {
682 GstPad *vis_sink_pad = NULL, *tee_pad = NULL;
684 /* Now get tee pad and block it async */
685 vis_sink_pad = gst_element_get_pad (play_bin->visualisation,
687 if (!GST_IS_PAD (vis_sink_pad)) {
690 tee_pad = gst_pad_get_peer (vis_sink_pad);
691 if (!GST_IS_PAD (tee_pad)) {
695 /* Block with callback */
696 gst_pad_set_blocked_async (tee_pad, TRUE, gst_play_bin_vis_blocked,
700 gst_object_unref (vis_sink_pad);
703 gst_object_unref (tee_pad);
705 gst_object_unref (vis_bin);
707 play_bin->visualisation = play_bin->pending_visualisation;
708 play_bin->pending_visualisation = NULL;
711 play_bin->visualisation = play_bin->pending_visualisation;
712 play_bin->pending_visualisation = NULL;
718 play_bin->volume = g_value_get_double (value);
719 if (play_bin->volume_element) {
720 g_object_set (G_OBJECT (play_bin->volume_element), "volume",
721 play_bin->volume, NULL);
725 g_free (play_bin->font_desc);
726 play_bin->font_desc = g_strdup (g_value_get_string (value));
727 if (play_bin->textoverlay_element) {
728 g_object_set (G_OBJECT (play_bin->textoverlay_element),
729 "font-desc", g_value_get_string (value), NULL);
732 case ARG_CONNECTION_SPEED:
733 play_bin->connection_speed = g_value_get_uint (value) * 1000;
736 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
742 gst_play_bin_get_property (GObject * object, guint prop_id, GValue * value,
745 GstPlayBin *play_bin;
747 play_bin = GST_PLAY_BIN (object);
751 g_value_set_object (value, play_bin->video_sink);
754 g_value_set_object (value, play_bin->audio_sink);
757 g_value_set_object (value, play_bin->visualisation);
760 g_value_set_double (value, play_bin->volume);
763 gst_value_set_mini_object (value, GST_MINI_OBJECT (play_bin->frame));
765 case ARG_CONNECTION_SPEED:
766 g_value_set_uint (value, play_bin->connection_speed / 1000);
769 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
774 /* signal fired when the identity has received a new buffer. This is used for
775 * making screenshots.
778 handoff (GstElement * identity, GstBuffer * frame, gpointer data)
780 GstPlayBin *play_bin = GST_PLAY_BIN (data);
781 GstBuffer **frame_p = &play_bin->frame;
783 gst_mini_object_replace ((GstMiniObject **) frame_p,
784 GST_MINI_OBJECT_CAST (frame));
786 /* applications need to know the buffer caps,
787 * make sure they are always set on the frame */
788 if (GST_BUFFER_CAPS (play_bin->frame) == NULL) {
791 if ((pad = gst_element_get_pad (identity, "sink"))) {
792 gst_buffer_set_caps (play_bin->frame, GST_PAD_CAPS (pad));
793 gst_object_unref (pad);
798 /* make the element (bin) that contains the elements needed to perform
799 * video display. We connect a handoff signal to identity so that we
800 * can grab snapshots. Identity's sinkpad is ghosted to vbin.
802 * +-------------------------------------------------------------+
804 * | +--------+ +----------+ +----------+ +---------+ |
805 * | |identity| |colorspace| |videoscale| |videosink| |
806 * | +-sink src-sink src-sink src-sink | |
807 * | | +---+----+ +----------+ +----------+ +---------+ |
809 * +----------|--------------------------------------------------+
813 gen_video_element (GstPlayBin * play_bin)
820 GstElement *identity;
823 /* first see if we have it in the cache */
824 element = g_hash_table_lookup (play_bin->cache, "vbin");
825 if (element != NULL) {
829 if (play_bin->video_sink) {
830 sink = play_bin->video_sink;
832 sink = gst_element_factory_make ("autovideosink", "videosink");
834 sink = gst_element_factory_make ("xvimagesink", "videosink");
839 gst_object_ref (sink);
840 g_hash_table_insert (play_bin->cache, "video_sink", sink);
842 /* create a bin to hold objects, as we create them we add them to this bin so
843 * that when something goes wrong we only need to unref the bin */
844 element = gst_bin_new ("vbin");
845 gst_bin_add (GST_BIN_CAST (element), sink);
847 conv = gst_element_factory_make ("ffmpegcolorspace", "vconv");
850 gst_bin_add (GST_BIN_CAST (element), conv);
852 scale = gst_element_factory_make ("videoscale", "vscale");
855 gst_bin_add (GST_BIN_CAST (element), scale);
857 identity = gst_element_factory_make ("identity", "id");
858 g_object_set (identity, "silent", TRUE, NULL);
859 g_signal_connect (identity, "handoff", G_CALLBACK (handoff), play_bin);
860 gst_bin_add (GST_BIN_CAST (element), identity);
862 gst_element_link_pads (identity, "src", conv, "sink");
863 gst_element_link_pads (conv, "src", scale, "sink");
864 /* be more careful with the pad from the custom sink element, it might not
866 if (!gst_element_link_pads (scale, "src", sink, NULL))
869 pad = gst_element_get_pad (identity, "sink");
870 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
871 gst_object_unref (pad);
873 gst_element_set_state (element, GST_STATE_READY);
875 /* since we're gonna add it to a bin but don't want to lose it,
876 * we keep a reference. */
877 gst_object_ref (element);
878 g_hash_table_insert (play_bin->cache, "vbin", element);
885 /* FIXME: this warrants adding a CORE error category for missing
886 * elements/plugins */
887 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
888 (_("Both autovideosink and xvimagesink elements are missing.")),
894 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
895 (_("Missing element '%s' - check your GStreamer installation."),
896 "ffmpegcolorspace"), (NULL));
897 gst_object_unref (element);
903 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
904 (_("Missing element '%s' - check your GStreamer installation."),
905 "videoscale"), ("possibly a liboil version mismatch?"));
906 gst_object_unref (element);
911 GST_ELEMENT_ERROR (play_bin, CORE, PAD,
912 (NULL), ("Failed to configure the video sink."));
913 gst_object_unref (element);
918 /* make an element for playback of video with subtitles embedded.
920 * +--------------------------------------------------+
921 * | tbin +-------------+ |
922 * | +-----+ | textoverlay | +------+ |
923 * | | csp | +--video_sink | | vbin | |
924 * video_sink-sink src+ +-text_sink src-sink | |
925 * | +-----+ | +-------------+ +------+ |
926 * text_sink-------------+ |
927 * +--------------------------------------------------+
929 * If there is no subtitle renderer this function will simply return the
930 * videosink without the text_sink pad.
933 gen_text_element (GstPlayBin * play_bin)
935 GstElement *element, *csp, *overlay, *vbin;
938 /* Create the video rendering bin, error is posted when this fails. */
939 vbin = gen_video_element (play_bin);
944 overlay = gst_element_factory_make ("textoverlay", "overlay");
946 /* If no overlay return the video bin without subtitle support. */
951 element = gst_bin_new ("textbin");
953 /* Set some parameters */
954 g_object_set (G_OBJECT (overlay),
955 "halign", "center", "valign", "bottom", NULL);
956 if (play_bin->font_desc) {
957 g_object_set (G_OBJECT (overlay), "font-desc", play_bin->font_desc, NULL);
961 play_bin->textoverlay_element = GST_ELEMENT_CAST (gst_object_ref (overlay));
963 /* we know this will succeed, as the video bin already created one before */
964 csp = gst_element_factory_make ("ffmpegcolorspace", "subtitlecsp");
966 /* Add our elements */
967 gst_bin_add_many (GST_BIN_CAST (element), csp, overlay, vbin, NULL);
970 gst_element_link_pads (csp, "src", overlay, "video_sink");
971 gst_element_link_pads (overlay, "src", vbin, "sink");
973 /* Add ghost pads on the subtitle bin */
974 pad = gst_element_get_pad (overlay, "text_sink");
975 gst_element_add_pad (element, gst_ghost_pad_new ("text_sink", pad));
976 gst_object_unref (pad);
978 pad = gst_element_get_pad (csp, "sink");
979 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
980 gst_object_unref (pad);
982 /* Set state to READY */
983 gst_element_set_state (element, GST_STATE_READY);
990 GST_WARNING_OBJECT (play_bin,
991 "No overlay (pango) element, subtitles disabled");
996 /* make the element (bin) that contains the elements needed to perform
999 * +-------------------------------------------------------------+
1001 * | +---------+ +----------+ +---------+ +---------+ |
1002 * | |audioconv| |audioscale| | volume | |audiosink| |
1003 * | +-sink src-sink src-sink src-sink | |
1004 * | | +---------+ +----------+ +---------+ +---------+ |
1006 * +-------------------------------------------------------------+
1009 gen_audio_element (GstPlayBin * play_bin)
1012 GstElement *element;
1019 element = g_hash_table_lookup (play_bin->cache, "abin");
1020 if (element != NULL)
1023 if (play_bin->audio_sink) {
1024 sink = play_bin->audio_sink;
1026 sink = gst_element_factory_make ("autoaudiosink", "audiosink");
1028 sink = gst_element_factory_make ("alsasink", "audiosink");
1033 play_bin->audio_sink = GST_ELEMENT_CAST (gst_object_ref (sink));
1036 gst_object_ref (sink);
1037 g_hash_table_insert (play_bin->cache, "audio_sink", sink);
1039 element = gst_bin_new ("abin");
1040 gst_bin_add (GST_BIN_CAST (element), sink);
1042 conv = gst_element_factory_make ("audioconvert", "aconv");
1044 goto no_audioconvert;
1045 gst_bin_add (GST_BIN_CAST (element), conv);
1047 scale = gst_element_factory_make ("audioresample", "aresample");
1049 goto no_audioresample;
1050 gst_bin_add (GST_BIN_CAST (element), scale);
1052 volume = gst_element_factory_make ("volume", "volume");
1053 g_object_set (G_OBJECT (volume), "volume", play_bin->volume, NULL);
1054 play_bin->volume_element = volume;
1055 gst_bin_add (GST_BIN_CAST (element), volume);
1057 res = gst_element_link_pads (conv, "src", scale, "sink");
1058 res &= gst_element_link_pads (scale, "src", volume, "sink");
1059 res &= gst_element_link_pads (volume, "src", sink, NULL);
1063 pad = gst_element_get_pad (conv, "sink");
1064 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
1065 gst_object_unref (pad);
1067 gst_element_set_state (element, GST_STATE_READY);
1069 /* since we're gonna add it to a bin but don't want to lose it,
1070 * we keep a reference. */
1071 gst_object_ref (element);
1072 g_hash_table_insert (play_bin->cache, "abin", element);
1079 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1080 (_("Both autoaudiosink and alsasink elements are missing.")), (NULL));
1085 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1086 (_("Missing element '%s' - check your GStreamer installation."),
1087 "audioconvert"), ("possibly a liboil version mismatch?"));
1088 gst_object_unref (element);
1094 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1095 (_("Missing element '%s' - check your GStreamer installation."),
1096 "audioresample"), ("possibly a liboil version mismatch?"));
1097 gst_object_unref (element);
1102 GST_ELEMENT_ERROR (play_bin, CORE, PAD,
1103 (NULL), ("Failed to configure the audio sink."));
1104 gst_object_unref (element);
1109 /* make the element (bin) that contains the elements needed to perform
1110 * visualisation ouput. The idea is to split the audio using tee, then
1111 * sending the output to the regular audio bin and the other output to
1112 * the vis plugin that transforms it into a video that is rendered with the
1113 * normal video bin. The video bin is run in a thread to make sure it does
1114 * not block the audio playback pipeline.
1116 * +--------------------------------------------------------------------+
1118 * | +------+ +--------+ +----------------+ |
1119 * | | tee | | aqueue | | abin ... | |
1120 * | +-sink src-sink src-sink | |
1121 * | | | | +--------+ +----------------+ |
1123 * | | | | +------+ +---------+ +------+ +-----------+ |
1124 * | | | | |vqueue| |audioconv| | vis | | vbin ... | |
1125 * | | | src-sink src-sink src-sink src-sink | |
1126 * | | | | +------+ +---------+ +------+ +-----------+ |
1130 +---------------------------------------------------------------------+
1133 gen_vis_element (GstPlayBin * play_bin)
1136 GstElement *element;
1142 GstElement *vqueue, *aqueue;
1145 /* errors are already posted when these fail. */
1146 asink = gen_audio_element (play_bin);
1149 vsink = gen_video_element (play_bin);
1151 gst_object_unref (asink);
1155 element = gst_bin_new ("visbin");
1156 tee = gst_element_factory_make ("tee", "tee");
1158 vqueue = gst_element_factory_make ("queue", "vqueue");
1159 aqueue = gst_element_factory_make ("queue", "aqueue");
1161 gst_bin_add (GST_BIN_CAST (element), asink);
1162 gst_bin_add (GST_BIN_CAST (element), vqueue);
1163 gst_bin_add (GST_BIN_CAST (element), aqueue);
1164 gst_bin_add (GST_BIN_CAST (element), vsink);
1165 gst_bin_add (GST_BIN_CAST (element), tee);
1167 conv = gst_element_factory_make ("audioconvert", "aconv");
1169 goto no_audioconvert;
1170 gst_bin_add (GST_BIN_CAST (element), conv);
1172 if (play_bin->visualisation) {
1173 gst_object_ref (play_bin->visualisation);
1174 vis = play_bin->visualisation;
1176 vis = gst_element_factory_make ("goom", "vis");
1180 gst_bin_add (GST_BIN_CAST (element), vis);
1182 res = gst_element_link_pads (vqueue, "src", conv, "sink");
1183 res &= gst_element_link_pads (conv, "src", vis, "sink");
1184 res &= gst_element_link_pads (vis, "src", vsink, "sink");
1188 pad = gst_element_get_pad (aqueue, "sink");
1189 rpad = gst_element_get_request_pad (tee, "src%d");
1190 gst_pad_link (rpad, pad);
1191 gst_object_unref (rpad);
1192 gst_object_unref (pad);
1193 gst_element_link_pads (aqueue, "src", asink, "sink");
1195 pad = gst_element_get_pad (vqueue, "sink");
1196 rpad = gst_element_get_request_pad (tee, "src%d");
1197 gst_pad_link (rpad, pad);
1198 gst_object_unref (rpad);
1199 gst_object_unref (pad);
1201 pad = gst_element_get_pad (tee, "sink");
1202 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
1203 gst_object_unref (pad);
1210 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1211 (_("Missing element '%s' - check your GStreamer installation."),
1212 "audioconvert"), ("possibly a liboil version mismatch?"));
1213 gst_object_unref (element);
1218 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1219 (_("Missing element '%s' - check your GStreamer installation."),
1221 gst_object_unref (element);
1226 GST_ELEMENT_ERROR (play_bin, CORE, PAD,
1227 (NULL), ("Failed to configure the visualisation element."));
1228 gst_object_unref (element);
1233 /* get rid of all installed sinks */
1235 remove_sinks (GstPlayBin * play_bin)
1239 GstElement *element;
1242 if (play_bin->cache == NULL)
1245 GST_DEBUG ("removesinks");
1246 element = g_hash_table_lookup (play_bin->cache, "abin");
1247 if (element != NULL) {
1248 parent = gst_element_get_parent (element);
1249 if (parent != NULL) {
1250 /* we remove the element from the parent so that
1251 * there is no unwanted state change when the parent
1253 play_bin->sinks = g_list_remove (play_bin->sinks, element);
1254 gst_element_set_state (element, GST_STATE_NULL);
1255 gst_bin_remove (GST_BIN_CAST (parent), element);
1256 gst_object_unref (parent);
1258 pad = gst_element_get_pad (element, "sink");
1260 peer = gst_pad_get_peer (pad);
1262 gst_pad_unlink (peer, pad);
1263 gst_object_unref (peer);
1265 gst_object_unref (pad);
1268 element = g_hash_table_lookup (play_bin->cache, "vbin");
1269 if (element != NULL) {
1270 parent = gst_element_get_parent (element);
1271 if (parent != NULL) {
1272 play_bin->sinks = g_list_remove (play_bin->sinks, element);
1273 gst_element_set_state (element, GST_STATE_NULL);
1274 gst_bin_remove (GST_BIN_CAST (parent), element);
1275 gst_object_unref (parent);
1277 pad = gst_element_get_pad (element, "sink");
1279 peer = gst_pad_get_peer (pad);
1281 gst_pad_unlink (peer, pad);
1282 gst_object_unref (peer);
1284 gst_object_unref (pad);
1288 for (sinks = play_bin->sinks; sinks; sinks = g_list_next (sinks)) {
1289 GstElement *element = GST_ELEMENT_CAST (sinks->data);
1293 pad = gst_element_get_pad (element, "sink");
1295 GST_LOG ("removing sink %p", element);
1297 peer = gst_pad_get_peer (pad);
1299 gst_pad_unlink (peer, pad);
1300 gst_object_unref (peer);
1302 gst_object_unref (pad);
1304 gst_element_set_state (element, GST_STATE_NULL);
1305 gst_bin_remove (GST_BIN_CAST (play_bin), element);
1307 g_list_free (play_bin->sinks);
1308 play_bin->sinks = NULL;
1310 if (play_bin->visualisation) {
1311 GstElement *vis_bin;
1314 GST_ELEMENT_CAST (gst_element_get_parent (play_bin->visualisation));
1316 gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
1319 gst_bin_remove (GST_BIN_CAST (vis_bin), play_bin->visualisation);
1320 gst_object_unref (vis_bin);
1324 if (play_bin->frame) {
1325 gst_buffer_unref (play_bin->frame);
1326 play_bin->frame = NULL;
1329 if (play_bin->textoverlay_element) {
1330 gst_object_unref (play_bin->textoverlay_element);
1331 play_bin->textoverlay_element = NULL;
1335 /* loop over the streams and set up the pipeline to play this
1336 * media file. First we count the number of audio and video streams.
1337 * If there is no video stream but there exists an audio stream,
1338 * we install a visualisation pipeline.
1340 * Also make sure to only connect the first audio and video pad. FIXME
1341 * this should eventually be handled with a tuner interface so that
1342 * one can switch the streams.
1344 * This function takes ownership of @sink.*
1347 add_sink (GstPlayBin * play_bin, GstElement * sink, GstPad * srcpad,
1348 GstPad * subtitle_pad)
1351 GstPadLinkReturn linkres;
1353 GstStateChangeReturn stateret;
1356 g_return_val_if_fail (sink != NULL, FALSE);
1358 /* For live pipelines we need to add the bin in the same state as the
1359 * parent so that it starts as soon as it is prerolled. */
1360 if (play_bin->is_live)
1361 state = GST_STATE_PLAYING;
1363 state = GST_STATE_PAUSED;
1365 /* this is only for debugging */
1366 parent = gst_pad_get_parent_element (srcpad);
1368 GST_DEBUG ("Adding sink with state %d (parent: %d, peer: %d)",
1369 GST_STATE (sink), GST_STATE (play_bin), GST_STATE (parent));
1370 gst_object_unref (parent);
1372 gst_bin_add (GST_BIN_CAST (play_bin), sink);
1374 /* for live pipelines, disable the sync in the sinks until core handles this
1376 if (play_bin->is_live)
1377 gst_element_set_clock (sink, NULL);
1379 /* bring it to the PAUSED state so we can link to the peer without
1380 * breaking the flow */
1381 stateret = gst_element_set_state (sink, state);
1382 if (stateret == GST_STATE_CHANGE_FAILURE)
1385 /* we found a sink for this stream, now try to install it */
1386 sinkpad = gst_element_get_pad (sink, "sink");
1387 linkres = gst_pad_link (srcpad, sinkpad);
1388 gst_object_unref (sinkpad);
1390 /* try to link the pad of the sink to the stream */
1391 if (GST_PAD_LINK_FAILED (linkres))
1394 if (GST_IS_PAD (subtitle_pad)) {
1395 sinkpad = gst_element_get_pad (sink, "text_sink");
1396 linkres = gst_pad_link (subtitle_pad, sinkpad);
1397 gst_object_unref (sinkpad);
1400 /* try to link the subtitle pad of the sink to the stream, this is not
1402 if (GST_PAD_LINK_FAILED (linkres))
1403 goto subtitle_failed;
1406 /* we got the sink succesfully linked, now keep the sink
1407 * in our internal list */
1408 play_bin->sinks = g_list_prepend (play_bin->sinks, sink);
1415 gst_element_set_state (sink, GST_STATE_NULL);
1416 gst_bin_remove (GST_BIN_CAST (play_bin), sink);
1417 GST_DEBUG_OBJECT (play_bin, "state change failure when adding sink");
1425 /* could not link this stream */
1426 caps = gst_pad_get_caps (srcpad);
1427 capsstr = gst_caps_to_string (caps);
1428 g_warning ("could not link %s: %d", capsstr, linkres);
1429 GST_DEBUG_OBJECT (play_bin,
1430 "link failed when adding sink, caps %s, reason %d", capsstr, linkres);
1432 gst_caps_unref (caps);
1434 gst_element_set_state (sink, GST_STATE_NULL);
1435 gst_bin_remove (GST_BIN_CAST (play_bin), sink);
1443 /* could not link this stream */
1444 caps = gst_pad_get_caps (subtitle_pad);
1445 capsstr = gst_caps_to_string (caps);
1446 GST_DEBUG_OBJECT (play_bin,
1447 "subtitle link failed when adding sink, caps %s, reason %d", capsstr,
1450 gst_caps_unref (caps);
1458 setup_sinks (GstPlayBaseBin * play_base_bin, GstPlayBaseGroup * group)
1460 GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin);
1461 GList *streaminfo = NULL, *s;
1462 gboolean need_vis = FALSE;
1463 gboolean need_text = FALSE;
1464 GstPad *textsrcpad = NULL, *pad = NULL;
1466 gboolean res = TRUE;
1468 /* get rid of existing sinks */
1469 if (play_bin->sinks) {
1470 remove_sinks (play_bin);
1472 GST_DEBUG_OBJECT (play_base_bin, "setupsinks");
1474 /* find out what to do */
1475 if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0 &&
1476 group->type[GST_STREAM_TYPE_TEXT - 1].npads > 0) {
1478 } else if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads == 0 &&
1479 group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0 &&
1480 play_bin->visualisation != NULL) {
1484 /* now actually connect everything */
1485 g_object_get (G_OBJECT (play_base_bin), "stream-info", &streaminfo, NULL);
1486 for (s = streaminfo; s; s = g_list_next (s)) {
1487 GObject *obj = G_OBJECT (s->data);
1491 g_object_get (obj, "type", &type, NULL);
1492 g_object_get (obj, "object", &object, NULL);
1496 if (group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0) {
1498 sink = gen_vis_element (play_bin);
1500 sink = gen_audio_element (play_bin);
1505 pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll,
1507 res = add_sink (play_bin, sink, pad, NULL);
1508 gst_object_unref (pad);
1512 if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0) {
1514 GstObject *parent = NULL, *grandparent = NULL;
1515 GstPad *ghost = NULL;
1517 sink = gen_text_element (play_bin);
1519 gst_element_get_pad (group->type[GST_STREAM_TYPE_TEXT - 1].preroll,
1521 /* This pad is from subtitle-bin, we need to create a ghost pad to have
1522 common grandparents */
1523 parent = gst_object_get_parent (GST_OBJECT_CAST (textsrcpad));
1525 GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no parent !");
1526 gst_object_unref (textsrcpad);
1531 grandparent = gst_object_get_parent (parent);
1533 GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no grandparent !");
1534 gst_object_unref (parent);
1535 gst_object_unref (textsrcpad);
1540 /* We ghost the pad on subtitle_bin only, if the text pad is from the
1541 media demuxer we keep it as it is */
1542 if (!GST_IS_PLAY_BIN (grandparent)) {
1543 GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from a subtitle "
1544 "file, ghosting to a suitable hierarchy");
1545 ghost = gst_ghost_pad_new ("text_src", textsrcpad);
1546 if (!GST_IS_PAD (ghost)) {
1547 GST_WARNING_OBJECT (textsrcpad, "failed creating ghost pad for "
1549 gst_object_unref (parent);
1550 gst_object_unref (grandparent);
1551 gst_object_unref (textsrcpad);
1556 gst_pad_set_active (ghost, TRUE);
1557 if (gst_element_add_pad (GST_ELEMENT_CAST (grandparent), ghost)) {
1558 gst_object_unref (textsrcpad);
1559 textsrcpad = gst_object_ref (ghost);
1561 GST_WARNING_OBJECT (ghost, "failed adding ghost pad on subtitle-bin");
1562 gst_pad_set_active (ghost, FALSE);
1563 gst_object_unref (ghost);
1564 gst_object_unref (textsrcpad);
1568 GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from the demuxer "
1569 "no changes to hierarchy needed");
1572 gst_object_unref (parent);
1573 gst_object_unref (grandparent);
1575 sink = gen_video_element (play_bin);
1580 pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll,
1582 res = add_sink (play_bin, sink, pad, textsrcpad);
1583 gst_object_unref (pad);
1585 gst_object_unref (textsrcpad);
1588 /* remove the sinks now, pipeline get_state will now wait for the
1589 * sinks to preroll */
1590 if (play_bin->fakesink) {
1591 gst_element_set_state (play_bin->fakesink, GST_STATE_NULL);
1592 gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink);
1593 play_bin->fakesink = NULL;
1599 /* Send an event to our sinks until one of them works; don't then send to the
1600 * remaining sinks (unlike GstBin)
1603 gst_play_bin_send_event_to_sink (GstPlayBin * play_bin, GstEvent * event)
1605 GList *sinks = play_bin->sinks;
1606 gboolean res = TRUE;
1609 GstElement *sink = GST_ELEMENT_CAST (sinks->data);
1611 gst_event_ref (event);
1612 if ((res = gst_element_send_event (sink, event))) {
1613 GST_DEBUG_OBJECT (play_bin,
1614 "Sent event succesfully to sink %" GST_PTR_FORMAT, sink);
1617 GST_DEBUG_OBJECT (play_bin,
1618 "Event failed when sent to sink %" GST_PTR_FORMAT, sink);
1620 sinks = g_list_next (sinks);
1623 gst_event_unref (event);
1629 do_playbin_seek (GstElement * element, GstEvent * event)
1634 gboolean was_playing = FALSE;
1637 gst_event_parse_seek (event, &rate, NULL, &flags, NULL, NULL, NULL, NULL);
1639 flush = flags & GST_SEEK_FLAG_FLUSH;
1644 /* need to call _get_state() since a bin state is only updated
1645 * with this call. */
1646 gst_element_get_state (element, &state, NULL, 0);
1647 was_playing = state == GST_STATE_PLAYING;
1650 gst_element_set_state (element, GST_STATE_PAUSED);
1651 gst_element_get_state (element, NULL, NULL, 50 * GST_MSECOND);
1655 GST_DEBUG_OBJECT (element, "Sending seek event to a sink");
1656 res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event);
1659 /* need to reset the stream time to 0 after a flushing seek */
1661 gst_pipeline_set_new_stream_time (GST_PIPELINE (element), 0);
1664 /* and continue playing */
1665 gst_element_set_state (element, GST_STATE_PLAYING);
1670 /* We only want to send the event to a single sink (overriding GstBin's
1671 * behaviour), but we want to keep GstPipeline's behaviour - wrapping seek
1672 * events appropriately. So, this is a messy duplication of code. */
1674 gst_play_bin_send_event (GstElement * element, GstEvent * event)
1676 gboolean res = FALSE;
1677 GstEventType event_type = GST_EVENT_TYPE (event);
1680 switch (event_type) {
1681 case GST_EVENT_SEEK:
1682 res = do_playbin_seek (element, event);
1685 res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event);
1692 /* Override the set_clock function, we don't want to set a clock on the sinks
1693 * when we are live pipeline so that they don't synchronize until this is
1696 gst_play_bin_set_clock_func (GstElement * element, GstClock * clock)
1700 GstPlayBin *play_bin;
1701 gboolean res = TRUE;
1702 GstElement *asink, *vsink;
1704 bin = GST_BIN (element);
1705 play_bin = GST_PLAY_BIN (element);
1707 asink = g_hash_table_lookup (play_bin->cache, "audio_sink");
1708 vsink = g_hash_table_lookup (play_bin->cache, "video_sink");
1710 GST_DEBUG_OBJECT (play_bin, "setting clock, is_live %d", play_bin->is_live);
1712 GST_OBJECT_LOCK (bin);
1713 if (element->clock != clock) {
1714 for (children = bin->children; children; children = g_list_next (children)) {
1715 GstElement *child = GST_ELEMENT (children->data);
1717 if (play_bin->is_live && (child == asink || child == vsink))
1718 res &= gst_element_set_clock (child, NULL);
1720 res &= gst_element_set_clock (child, clock);
1723 GST_OBJECT_UNLOCK (bin);
1729 value_list_append_structure_list (GValue * list_val, GstStructure ** first,
1730 GList * structure_list)
1734 for (l = structure_list; l != NULL; l = l->next) {
1735 GValue val = { 0, };
1738 *first = gst_structure_copy ((GstStructure *) l->data);
1740 g_value_init (&val, GST_TYPE_STRUCTURE);
1741 g_value_take_boxed (&val, gst_structure_copy ((GstStructure *) l->data));
1742 gst_value_list_append_value (list_val, &val);
1743 g_value_unset (&val);
1747 /* if it's a redirect message with multiple redirect locations we might
1748 * want to pick a different 'best' location depending on the required
1749 * bitrates and the connection speed */
1751 gst_play_bin_handle_redirect_message (GstPlayBin * playbin, GstMessage * msg)
1753 const GValue *locations_list, *location_val;
1754 GstMessage *new_msg;
1755 GstStructure *new_structure = NULL;
1756 GList *l_good = NULL, *l_neutral = NULL, *l_bad = NULL;
1757 GValue new_list = { 0, };
1760 GST_DEBUG_OBJECT (playbin, "redirect message: %" GST_PTR_FORMAT, msg);
1761 GST_DEBUG_OBJECT (playbin, "connection speed: %u", playbin->connection_speed);
1763 if (playbin->connection_speed == 0 || msg->structure == NULL)
1766 locations_list = gst_structure_get_value (msg->structure, "locations");
1767 if (locations_list == NULL)
1770 size = gst_value_list_get_size (locations_list);
1774 /* maintain existing order as much as possible, just sort references
1775 * with too high a bitrate to the end (the assumption being that if
1776 * bitrates are given they are given for all interesting streams and
1777 * that the you-need-at-least-version-xyz redirect has the same bitrate
1778 * as the lowest referenced redirect alternative) */
1779 for (i = 0; i < size; ++i) {
1780 const GstStructure *s;
1783 location_val = gst_value_list_get_value (locations_list, i);
1784 s = (const GstStructure *) g_value_get_boxed (location_val);
1785 if (!gst_structure_get_int (s, "minimum-bitrate", &bitrate) || bitrate <= 0) {
1786 GST_DEBUG_OBJECT (playbin, "no bitrate: %" GST_PTR_FORMAT, s);
1787 l_neutral = g_list_append (l_neutral, (gpointer) s);
1788 } else if (bitrate > playbin->connection_speed) {
1789 GST_DEBUG_OBJECT (playbin, "bitrate too high: %" GST_PTR_FORMAT, s);
1790 l_bad = g_list_append (l_bad, (gpointer) s);
1791 } else if (bitrate <= playbin->connection_speed) {
1792 GST_DEBUG_OBJECT (playbin, "bitrate OK: %" GST_PTR_FORMAT, s);
1793 l_good = g_list_append (l_good, (gpointer) s);
1797 g_value_init (&new_list, GST_TYPE_LIST);
1798 value_list_append_structure_list (&new_list, &new_structure, l_good);
1799 value_list_append_structure_list (&new_list, &new_structure, l_neutral);
1800 value_list_append_structure_list (&new_list, &new_structure, l_bad);
1801 gst_structure_set_value (new_structure, "locations", &new_list);
1802 g_value_unset (&new_list);
1804 g_list_free (l_good);
1805 g_list_free (l_neutral);
1806 g_list_free (l_bad);
1808 new_msg = gst_message_new_element (msg->src, new_structure);
1809 gst_message_unref (msg);
1811 GST_DEBUG_OBJECT (playbin, "new redirect message: %" GST_PTR_FORMAT, new_msg);
1816 gst_play_bin_handle_message (GstBin * bin, GstMessage * msg)
1818 if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ELEMENT && msg->structure != NULL
1819 && gst_structure_has_name (msg->structure, "redirect")) {
1820 msg = gst_play_bin_handle_redirect_message (GST_PLAY_BIN (bin), msg);
1823 GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
1826 static GstStateChangeReturn
1827 gst_play_bin_change_state (GstElement * element, GstStateChange transition)
1829 GstStateChangeReturn ret;
1830 GstPlayBin *play_bin;
1832 play_bin = GST_PLAY_BIN (element);
1835 switch (transition) {
1836 case GST_STATE_CHANGE_READY_TO_PAUSED:
1837 /* this really is the easiest way to make the state change return
1838 * ASYNC until we added the sinks */
1839 if (!play_bin->fakesink) {
1840 play_bin->fakesink = gst_element_factory_make ("fakesink", "test");
1841 gst_bin_add (GST_BIN_CAST (play_bin), play_bin->fakesink);
1848 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1849 if (ret == GST_STATE_CHANGE_FAILURE)
1852 switch (transition) {
1853 case GST_STATE_CHANGE_READY_TO_PAUSED:
1854 /* remember us being a live pipeline */
1855 play_bin->is_live = (ret == GST_STATE_CHANGE_NO_PREROLL);
1856 GST_DEBUG_OBJECT (play_bin, "is live: %d", play_bin->is_live);
1858 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1859 /* FIXME Release audio device when we implement that */
1861 case GST_STATE_CHANGE_PAUSED_TO_READY:
1862 /* remove sinks we added */
1863 remove_sinks (play_bin);
1864 /* and there might be a fakesink we need to clean up now */
1865 if (play_bin->fakesink) {
1866 gst_element_set_state (play_bin->fakesink, GST_STATE_NULL);
1867 gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink);
1868 play_bin->fakesink = NULL;
1879 plugin_init (GstPlugin * plugin)
1881 GST_DEBUG_CATEGORY_INIT (gst_play_bin_debug, "playbin", 0, "play bin");
1883 gst_base_utils_init ();
1886 GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
1888 bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
1889 #endif /* ENABLE_NLS */
1891 return gst_element_register (plugin, "playbin", GST_RANK_NONE,
1895 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1898 "player bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,