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</title>
166 * Playbin handles buffering automatically for the most part, but applications
167 * need to handle parts of the buffering process as well. Whenever playbin is
168 * buffering, it will post BUFFERING messages on the bus with a percentage
169 * value that shows the progress of the buffering process. Applications need
170 * to set playbin to PLAYING or PAUSED state in response to these messages.
171 * They may also want to convey the buffering progress to the user in some
172 * way. Here is how to extract the percentage information from the message
173 * (requires GStreamer >= 0.10.11):
177 * switch (GST_MESSAGE_TYPE (msg)) {
178 * case GST_MESSAGE_BUFFERING: {
180 * gst_message_parse_buffering (msg, &percent);
181 * g_print ("Buffering (%%u percent done)", percent);
187 * Note that applications should keep/set the pipeline in the PAUSED state when
188 * a BUFFERING message is received with a buffer percent value < 100 and set
189 * the pipeline back to PLAYING state when a BUFFERING message with a value
190 * of 100 percent is received (if PLAYING is the desired state, that is).
192 * <title>Embedding the video window in your application</title>
194 * By default, playbin (or rather the video sinks used) will create their own
195 * window. Applications will usually want to force output to a window of their
196 * own, however. This can be done using the GstXOverlay interface, which most
197 * video sinks implement. See the documentation there for more details.
199 * <title>Specifying which CD/DVD device to use</title>
201 * The device to use for CDs/DVDs needs to be set on the source element
202 * playbin creates before it is opened. The only way to do this at the moment
203 * is to connect to playbin's "notify::source" signal, which will be emitted
204 * by playbin when it has created the source element for a particular URI.
205 * In the signal callback you can check if the source element has a "device"
206 * property and set it appropriately. In future ways might be added to specify
207 * the device as part of the URI, but at the time of writing this is not
210 * <title>Examples</title>
212 * Here is a simple pipeline to play back a video or audio file:
214 * gst-launch -v playbin uri=file:///path/to/somefile.avi
216 * This will play back the given AVI video file, given that the video and
217 * audio decoders required to decode the content are installed. Since no
218 * special audio sink or video sink is supplied (not possible via gst-launch),
219 * playbin will try to find a suitable audio and video sink automatically
220 * using the autoaudiosink and autovideosink elements.
223 * Here is a another pipeline to play track 4 of an audio CD:
225 * gst-launch -v playbin uri=cdda://4
227 * This will play back track 4 on an audio CD in your disc drive (assuming
228 * the drive is detected automatically by the plugin).
231 * Here is a another pipeline to play title 1 of a DVD:
233 * gst-launch -v playbin uri=dvd://1
235 * This will play back title 1 of a DVD in your disc drive (assuming
236 * the drive is detected automatically by the plugin).
248 #include <gst/gst-i18n-plugin.h>
249 #include <gst/pbutils/pbutils.h>
251 #include "gstplaybasebin.h"
253 GST_DEBUG_CATEGORY_STATIC (gst_play_bin_debug);
254 #define GST_CAT_DEFAULT gst_play_bin_debug
256 #define GST_TYPE_PLAY_BIN (gst_play_bin_get_type())
257 #define GST_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PLAY_BIN,GstPlayBin))
258 #define GST_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PLAY_BIN,GstPlayBinClass))
259 #define GST_IS_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PLAY_BIN))
260 #define GST_IS_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PLAY_BIN))
262 #define VOLUME_MAX_DOUBLE 10.0
264 typedef struct _GstPlayBin GstPlayBin;
265 typedef struct _GstPlayBinClass GstPlayBinClass;
269 GstPlayBaseBin parent;
271 /* the configurable elements */
272 GstElement *fakesink;
273 GstElement *audio_sink;
274 GstElement *video_sink;
275 GstElement *visualisation;
276 GstElement *pending_visualisation;
277 GstElement *volume_element;
278 GstElement *textoverlay_element;
281 /* these are the currently active sinks */
284 /* the last captured frame for snapshots */
287 /* our cache for the sinks */
290 /* font description */
293 /* indication if the pipeline is live */
297 struct _GstPlayBinClass
299 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 GstStateChangeReturn gst_play_bin_change_state (GstElement * element,
336 GstStateChange transition);
338 static void gst_play_bin_handle_message (GstBin * bin, GstMessage * message);
340 static GstElementClass *parent_class;
342 //static guint gst_play_bin_signals[LAST_SIGNAL] = { 0 };
344 static const GstElementDetails gst_play_bin_details =
345 GST_ELEMENT_DETAILS ("Player Bin",
346 "Generic/Bin/Player",
347 "Autoplug and play media from an uri",
348 "Wim Taymans <wim@fluendo.com>");
351 gst_play_bin_get_type (void)
353 static GType gst_play_bin_type = 0;
355 if (!gst_play_bin_type) {
356 static const GTypeInfo gst_play_bin_info = {
357 sizeof (GstPlayBinClass),
360 (GClassInitFunc) gst_play_bin_class_init,
365 (GInstanceInitFunc) gst_play_bin_init,
369 gst_play_bin_type = g_type_register_static (GST_TYPE_PLAY_BASE_BIN,
370 "GstPlayBin", &gst_play_bin_info, 0);
373 return gst_play_bin_type;
377 gst_play_bin_class_init (GstPlayBinClass * klass)
379 GObjectClass *gobject_klass;
380 GstElementClass *gstelement_klass;
381 GstBinClass *gstbin_klass;
382 GstPlayBaseBinClass *playbasebin_klass;
384 gobject_klass = (GObjectClass *) klass;
385 gstelement_klass = (GstElementClass *) klass;
386 gstbin_klass = (GstBinClass *) klass;
387 playbasebin_klass = (GstPlayBaseBinClass *) klass;
389 parent_class = g_type_class_peek_parent (klass);
391 gobject_klass->set_property = gst_play_bin_set_property;
392 gobject_klass->get_property = gst_play_bin_get_property;
394 g_object_class_install_property (gobject_klass, ARG_VIDEO_SINK,
395 g_param_spec_object ("video-sink", "Video Sink",
396 "the video output element to use (NULL = default sink)",
397 GST_TYPE_ELEMENT, G_PARAM_READWRITE));
398 g_object_class_install_property (gobject_klass, ARG_AUDIO_SINK,
399 g_param_spec_object ("audio-sink", "Audio Sink",
400 "the audio output element to use (NULL = default sink)",
401 GST_TYPE_ELEMENT, G_PARAM_READWRITE));
402 g_object_class_install_property (gobject_klass, ARG_VIS_PLUGIN,
403 g_param_spec_object ("vis-plugin", "Vis plugin",
404 "the visualization element to use (NULL = none)",
405 GST_TYPE_ELEMENT, G_PARAM_READWRITE));
406 g_object_class_install_property (gobject_klass, ARG_VOLUME,
407 g_param_spec_double ("volume", "volume", "volume",
408 0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE));
409 g_object_class_install_property (gobject_klass, ARG_FRAME,
410 gst_param_spec_mini_object ("frame", "Frame",
411 "The last frame (NULL = no video available)",
412 GST_TYPE_BUFFER, G_PARAM_READABLE));
413 g_object_class_install_property (gobject_klass, ARG_FONT_DESC,
414 g_param_spec_string ("subtitle-font-desc",
415 "Subtitle font description",
416 "Pango font description of font "
417 "to be used for subtitle rendering", NULL, G_PARAM_WRITABLE));
419 gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_play_bin_dispose);
421 gst_element_class_set_details (gstelement_klass, &gst_play_bin_details);
423 gstelement_klass->change_state =
424 GST_DEBUG_FUNCPTR (gst_play_bin_change_state);
425 gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_bin_send_event);
427 gstbin_klass->handle_message =
428 GST_DEBUG_FUNCPTR (gst_play_bin_handle_message);
430 playbasebin_klass->setup_output_pads = setup_sinks;
434 gst_play_bin_init (GstPlayBin * play_bin)
436 play_bin->video_sink = NULL;
437 play_bin->audio_sink = NULL;
438 play_bin->visualisation = NULL;
439 play_bin->pending_visualisation = NULL;
440 play_bin->volume_element = NULL;
441 play_bin->textoverlay_element = NULL;
442 play_bin->volume = 1.0;
443 play_bin->sinks = NULL;
444 play_bin->frame = NULL;
445 play_bin->font_desc = NULL;
446 play_bin->cache = g_hash_table_new_full (g_str_hash, g_str_equal,
447 NULL, (GDestroyNotify) gst_object_unref);
451 gst_play_bin_dispose (GObject * object)
453 GstPlayBin *play_bin;
455 play_bin = GST_PLAY_BIN (object);
457 if (play_bin->cache != NULL) {
458 remove_sinks (play_bin);
459 g_hash_table_destroy (play_bin->cache);
460 play_bin->cache = NULL;
463 if (play_bin->audio_sink != NULL) {
464 gst_element_set_state (play_bin->audio_sink, GST_STATE_NULL);
465 gst_object_unref (play_bin->audio_sink);
466 play_bin->audio_sink = NULL;
468 if (play_bin->video_sink != NULL) {
469 gst_element_set_state (play_bin->video_sink, GST_STATE_NULL);
470 gst_object_unref (play_bin->video_sink);
471 play_bin->video_sink = NULL;
473 if (play_bin->visualisation != NULL) {
474 gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
475 gst_object_unref (play_bin->visualisation);
476 play_bin->visualisation = NULL;
478 if (play_bin->pending_visualisation != NULL) {
479 gst_element_set_state (play_bin->pending_visualisation, GST_STATE_NULL);
480 gst_object_unref (play_bin->pending_visualisation);
481 play_bin->pending_visualisation = NULL;
483 if (play_bin->textoverlay_element != NULL) {
484 gst_object_unref (play_bin->textoverlay_element);
485 play_bin->textoverlay_element = NULL;
487 g_free (play_bin->font_desc);
488 play_bin->font_desc = NULL;
490 G_OBJECT_CLASS (parent_class)->dispose (object);
494 gst_play_bin_vis_unblocked (GstPad * tee_pad, gboolean blocked,
497 GstPlayBin *play_bin = GST_PLAY_BIN (user_data);
499 if (play_bin->pending_visualisation)
500 gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked,
505 gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked,
508 GstPlayBin *play_bin = GST_PLAY_BIN (user_data);
509 GstBin *vis_bin = NULL;
510 GstPad *vis_sink_pad = NULL, *vis_src_pad = NULL, *vqueue_pad = NULL;
512 GstElement *pending_visualisation;
514 GST_OBJECT_LOCK (play_bin);
515 pending_visualisation = play_bin->pending_visualisation;
516 play_bin->pending_visualisation = NULL;
517 GST_OBJECT_UNLOCK (play_bin);
519 /* We want to disable visualisation */
520 if (!GST_IS_ELEMENT (pending_visualisation)) {
521 /* Set visualisation element to READY */
522 gst_element_set_state (play_bin->visualisation, GST_STATE_READY);
527 GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin->
530 if (!GST_IS_BIN (vis_bin) || !GST_IS_PAD (tee_pad)) {
534 vis_src_pad = gst_element_get_pad (play_bin->visualisation, "src");
535 vis_sink_pad = gst_pad_get_peer (tee_pad);
537 /* Can be fakesink */
538 if (GST_IS_PAD (vis_src_pad)) {
539 vqueue_pad = gst_pad_get_peer (vis_src_pad);
542 if (!GST_IS_PAD (vis_sink_pad)) {
546 /* Check the bin's state */
547 GST_OBJECT_LOCK (vis_bin);
548 bin_state = GST_STATE (vis_bin);
549 GST_OBJECT_UNLOCK (vis_bin);
552 gst_pad_unlink (tee_pad, vis_sink_pad);
553 gst_object_unref (vis_sink_pad);
556 if (GST_IS_PAD (vqueue_pad)) {
557 gst_pad_unlink (vis_src_pad, vqueue_pad);
558 gst_object_unref (vis_src_pad);
562 /* Remove from vis_bin */
563 gst_bin_remove (vis_bin, play_bin->visualisation);
564 /* Set state to NULL */
565 gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
566 /* And loose our ref */
567 gst_object_unref (play_bin->visualisation);
569 if (pending_visualisation) {
570 /* Ref this new visualisation element before adding to the bin */
571 gst_object_ref (pending_visualisation);
572 /* Add the new one */
573 gst_bin_add (vis_bin, pending_visualisation);
574 /* Synchronizing state */
575 gst_element_set_state (pending_visualisation, bin_state);
577 vis_sink_pad = gst_element_get_pad (pending_visualisation, "sink");
578 vis_src_pad = gst_element_get_pad (pending_visualisation, "src");
580 if (!GST_IS_PAD (vis_sink_pad) || !GST_IS_PAD (vis_src_pad)) {
585 gst_pad_link (tee_pad, vis_sink_pad);
586 gst_pad_link (vis_src_pad, vqueue_pad);
590 gst_object_unref (play_bin->visualisation);
591 play_bin->visualisation = pending_visualisation;
595 gst_object_unref (vis_sink_pad);
598 gst_object_unref (vis_src_pad);
601 gst_object_unref (vqueue_pad);
604 gst_object_unref (vis_bin);
607 /* Unblock the pad */
608 gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked,
613 gst_play_bin_set_property (GObject * object, guint prop_id,
614 const GValue * value, GParamSpec * pspec)
616 GstPlayBin *play_bin;
618 play_bin = GST_PLAY_BIN (object);
622 if (play_bin->video_sink != NULL) {
623 gst_object_unref (play_bin->video_sink);
625 play_bin->video_sink = g_value_get_object (value);
626 if (play_bin->video_sink != NULL) {
627 gst_object_ref (play_bin->video_sink);
628 gst_object_sink (GST_OBJECT_CAST (play_bin->video_sink));
630 /* when changing the videosink, we just remove the
631 * video pipeline from the cache so that it will be
632 * regenerated with the new sink element */
633 g_hash_table_remove (play_bin->cache, "vbin");
636 if (play_bin->audio_sink != NULL) {
637 gst_object_unref (play_bin->audio_sink);
639 play_bin->audio_sink = g_value_get_object (value);
640 if (play_bin->audio_sink != NULL) {
641 gst_object_ref (play_bin->audio_sink);
642 gst_object_sink (GST_OBJECT_CAST (play_bin->audio_sink));
644 g_hash_table_remove (play_bin->cache, "abin");
648 GstElement *pending_visualisation =
649 GST_ELEMENT_CAST (g_value_get_object (value));
652 if (pending_visualisation) {
653 gst_object_ref (pending_visualisation);
654 gst_object_sink (pending_visualisation);
657 /* Do we already have a visualisation change pending ? */
658 GST_OBJECT_LOCK (play_bin);
659 if (play_bin->pending_visualisation) {
660 gst_object_unref (play_bin->pending_visualisation);
661 play_bin->pending_visualisation = pending_visualisation;
662 GST_OBJECT_UNLOCK (play_bin);
664 GST_OBJECT_UNLOCK (play_bin);
665 /* Was there a visualisation already set ? */
666 if (play_bin->visualisation != NULL) {
667 GstBin *vis_bin = NULL;
670 GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin->
673 /* Check if the visualisation is already in a bin */
674 if (GST_IS_BIN (vis_bin)) {
675 GstPad *vis_sink_pad = NULL, *tee_pad = NULL;
677 /* Now get tee pad and block it async */
678 vis_sink_pad = gst_element_get_pad (play_bin->visualisation,
680 if (!GST_IS_PAD (vis_sink_pad)) {
683 tee_pad = gst_pad_get_peer (vis_sink_pad);
684 if (!GST_IS_PAD (tee_pad)) {
688 play_bin->pending_visualisation = pending_visualisation;
689 /* Block with callback */
690 gst_pad_set_blocked_async (tee_pad, TRUE, gst_play_bin_vis_blocked,
694 gst_object_unref (vis_sink_pad);
697 gst_object_unref (tee_pad);
699 gst_object_unref (vis_bin);
701 play_bin->visualisation = pending_visualisation;
704 play_bin->visualisation = pending_visualisation;
710 play_bin->volume = g_value_get_double (value);
711 if (play_bin->volume_element) {
712 g_object_set (G_OBJECT (play_bin->volume_element), "volume",
713 play_bin->volume, NULL);
717 g_free (play_bin->font_desc);
718 play_bin->font_desc = g_strdup (g_value_get_string (value));
719 if (play_bin->textoverlay_element) {
720 g_object_set (G_OBJECT (play_bin->textoverlay_element),
721 "font-desc", g_value_get_string (value), NULL);
725 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
731 gst_play_bin_get_property (GObject * object, guint prop_id, GValue * value,
734 GstPlayBin *play_bin;
736 play_bin = GST_PLAY_BIN (object);
740 g_value_set_object (value, play_bin->video_sink);
743 g_value_set_object (value, play_bin->audio_sink);
746 g_value_set_object (value, play_bin->visualisation);
749 g_value_set_double (value, play_bin->volume);
752 GstBuffer *cur_frame = NULL;
754 gst_buffer_replace (&cur_frame, play_bin->frame);
755 gst_value_take_buffer (value, cur_frame);
759 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
764 /* signal fired when the identity has received a new buffer. This is used for
765 * making screenshots.
768 handoff (GstElement * identity, GstBuffer * frame, gpointer data)
770 GstPlayBin *play_bin = GST_PLAY_BIN (data);
772 /* applications need to know the buffer caps,
773 * make sure they are always set on the frame */
774 if (GST_BUFFER_CAPS (frame) == NULL) {
777 if ((pad = gst_element_get_pad (identity, "sink"))) {
778 gst_buffer_set_caps (frame, GST_PAD_CAPS (pad));
779 gst_object_unref (pad);
783 gst_buffer_replace (&play_bin->frame, frame);
787 post_missing_element_message (GstPlayBin * playbin, const gchar * name)
791 msg = gst_missing_element_message_new (GST_ELEMENT_CAST (playbin), name);
792 gst_element_post_message (GST_ELEMENT_CAST (playbin), msg);
795 /* make the element (bin) that contains the elements needed to perform
796 * video display. We connect a handoff signal to identity so that we
797 * can grab snapshots. Identity's sinkpad is ghosted to vbin.
799 * +-------------------------------------------------------------+
801 * | +--------+ +----------+ +----------+ +---------+ |
802 * | |identity| |colorspace| |videoscale| |videosink| |
803 * | +-sink src-sink src-sink src-sink | |
804 * | | +---+----+ +----------+ +----------+ +---------+ |
806 * +----------|--------------------------------------------------+
810 gen_video_element (GstPlayBin * play_bin)
817 GstElement *identity;
820 /* first see if we have it in the cache */
821 element = g_hash_table_lookup (play_bin->cache, "vbin");
822 if (element != NULL) {
826 if (play_bin->video_sink) {
827 sink = play_bin->video_sink;
829 sink = gst_element_factory_make ("autovideosink", "videosink");
831 sink = gst_element_factory_make ("xvimagesink", "videosink");
836 gst_object_ref (sink);
837 g_hash_table_insert (play_bin->cache, "video_sink", sink);
839 /* create a bin to hold objects, as we create them we add them to this bin so
840 * that when something goes wrong we only need to unref the bin */
841 element = gst_bin_new ("vbin");
842 gst_bin_add (GST_BIN_CAST (element), sink);
844 conv = gst_element_factory_make ("ffmpegcolorspace", "vconv");
847 gst_bin_add (GST_BIN_CAST (element), conv);
849 scale = gst_element_factory_make ("videoscale", "vscale");
852 gst_bin_add (GST_BIN_CAST (element), scale);
854 identity = gst_element_factory_make ("identity", "id");
855 g_object_set (identity, "silent", TRUE, NULL);
856 g_signal_connect (identity, "handoff", G_CALLBACK (handoff), play_bin);
857 gst_bin_add (GST_BIN_CAST (element), identity);
859 gst_element_link_pads (identity, "src", conv, "sink");
860 gst_element_link_pads (conv, "src", scale, "sink");
861 /* be more careful with the pad from the custom sink element, it might not
863 if (!gst_element_link_pads (scale, "src", sink, NULL))
866 pad = gst_element_get_pad (identity, "sink");
867 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
868 gst_object_unref (pad);
870 gst_element_set_state (element, GST_STATE_READY);
872 /* since we're gonna add it to a bin but don't want to lose it,
873 * we keep a reference. */
874 gst_object_ref (element);
875 g_hash_table_insert (play_bin->cache, "vbin", element);
882 post_missing_element_message (play_bin, "autovideosink");
883 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
884 (_("Both autovideosink and xvimagesink elements are missing.")),
890 post_missing_element_message (play_bin, "ffmpegcolorspace");
891 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
892 (_("Missing element '%s' - check your GStreamer installation."),
893 "ffmpegcolorspace"), (NULL));
894 gst_object_unref (element);
900 post_missing_element_message (play_bin, "videoscale");
901 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
902 (_("Missing element '%s' - check your GStreamer installation."),
903 "videoscale"), ("possibly a liboil version mismatch?"));
904 gst_object_unref (element);
909 GST_ELEMENT_ERROR (play_bin, CORE, PAD,
910 (NULL), ("Failed to configure the video sink."));
911 gst_object_unref (element);
916 /* make an element for playback of video with subtitles embedded.
918 * +--------------------------------------------------+
919 * | tbin +-------------+ |
920 * | +-----+ | textoverlay | +------+ |
921 * | | csp | +--video_sink | | vbin | |
922 * video_sink-sink src+ +-text_sink src-sink | |
923 * | +-----+ | +-------------+ +------+ |
924 * text_sink-------------+ |
925 * +--------------------------------------------------+
927 * If there is no subtitle renderer this function will simply return the
928 * videosink without the text_sink pad.
931 gen_text_element (GstPlayBin * play_bin)
933 GstElement *element, *csp, *overlay, *vbin;
936 /* Create the video rendering bin, error is posted when this fails. */
937 vbin = gen_video_element (play_bin);
942 overlay = gst_element_factory_make ("textoverlay", "overlay");
944 /* If no overlay return the video bin without subtitle support. */
949 element = gst_bin_new ("textbin");
951 /* Set some parameters */
952 g_object_set (G_OBJECT (overlay),
953 "halign", "center", "valign", "bottom", NULL);
954 if (play_bin->font_desc) {
955 g_object_set (G_OBJECT (overlay), "font-desc", play_bin->font_desc, NULL);
959 play_bin->textoverlay_element = GST_ELEMENT_CAST (gst_object_ref (overlay));
961 /* we know this will succeed, as the video bin already created one before */
962 csp = gst_element_factory_make ("ffmpegcolorspace", "subtitlecsp");
964 /* Add our elements */
965 gst_bin_add_many (GST_BIN_CAST (element), csp, overlay, vbin, NULL);
968 gst_element_link_pads (csp, "src", overlay, "video_sink");
969 gst_element_link_pads (overlay, "src", vbin, "sink");
971 /* Add ghost pads on the subtitle bin */
972 pad = gst_element_get_pad (overlay, "text_sink");
973 gst_element_add_pad (element, gst_ghost_pad_new ("text_sink", pad));
974 gst_object_unref (pad);
976 pad = gst_element_get_pad (csp, "sink");
977 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
978 gst_object_unref (pad);
980 /* Set state to READY */
981 gst_element_set_state (element, GST_STATE_READY);
988 post_missing_element_message (play_bin, "textoverlay");
989 GST_WARNING_OBJECT (play_bin,
990 "No overlay (pango) element, subtitles disabled");
995 /* make the element (bin) that contains the elements needed to perform
998 * +-------------------------------------------------------------+
1000 * | +---------+ +----------+ +---------+ +---------+ |
1001 * | |audioconv| |audioscale| | volume | |audiosink| |
1002 * | +-sink src-sink src-sink src-sink | |
1003 * | | +---------+ +----------+ +---------+ +---------+ |
1005 * +-------------------------------------------------------------+
1008 gen_audio_element (GstPlayBin * play_bin)
1011 GstElement *element;
1018 element = g_hash_table_lookup (play_bin->cache, "abin");
1019 if (element != NULL)
1022 if (play_bin->audio_sink) {
1023 sink = play_bin->audio_sink;
1025 sink = gst_element_factory_make ("autoaudiosink", "audiosink");
1027 sink = gst_element_factory_make ("alsasink", "audiosink");
1032 play_bin->audio_sink = GST_ELEMENT_CAST (gst_object_ref (sink));
1035 gst_object_ref (sink);
1036 g_hash_table_insert (play_bin->cache, "audio_sink", sink);
1038 element = gst_bin_new ("abin");
1039 gst_bin_add (GST_BIN_CAST (element), sink);
1041 conv = gst_element_factory_make ("audioconvert", "aconv");
1043 goto no_audioconvert;
1044 gst_bin_add (GST_BIN_CAST (element), conv);
1046 scale = gst_element_factory_make ("audioresample", "aresample");
1048 goto no_audioresample;
1049 gst_bin_add (GST_BIN_CAST (element), scale);
1051 volume = gst_element_factory_make ("volume", "volume");
1052 g_object_set (G_OBJECT (volume), "volume", play_bin->volume, NULL);
1053 play_bin->volume_element = volume;
1054 gst_bin_add (GST_BIN_CAST (element), volume);
1056 res = gst_element_link_pads (conv, "src", scale, "sink");
1057 res &= gst_element_link_pads (scale, "src", volume, "sink");
1058 res &= gst_element_link_pads (volume, "src", sink, NULL);
1062 pad = gst_element_get_pad (conv, "sink");
1063 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
1064 gst_object_unref (pad);
1066 gst_element_set_state (element, GST_STATE_READY);
1068 /* since we're gonna add it to a bin but don't want to lose it,
1069 * we keep a reference. */
1070 gst_object_ref (element);
1071 g_hash_table_insert (play_bin->cache, "abin", element);
1078 post_missing_element_message (play_bin, "autoaudiosink");
1079 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1080 (_("Both autoaudiosink and alsasink elements are missing.")), (NULL));
1085 post_missing_element_message (play_bin, "audioconvert");
1086 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1087 (_("Missing element '%s' - check your GStreamer installation."),
1088 "audioconvert"), ("possibly a liboil version mismatch?"));
1089 gst_object_unref (element);
1095 post_missing_element_message (play_bin, "audioresample");
1096 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1097 (_("Missing element '%s' - check your GStreamer installation."),
1098 "audioresample"), ("possibly a liboil version mismatch?"));
1099 gst_object_unref (element);
1104 GST_ELEMENT_ERROR (play_bin, CORE, PAD,
1105 (NULL), ("Failed to configure the audio sink."));
1106 gst_object_unref (element);
1111 /* make the element (bin) that contains the elements needed to perform
1112 * visualisation ouput. The idea is to split the audio using tee, then
1113 * sending the output to the regular audio bin and the other output to
1114 * the vis plugin that transforms it into a video that is rendered with the
1115 * normal video bin. The video and audio bins are run in threads to make sure
1116 * they don't block eachother.
1118 * +-----------------------------------------------------------------------+
1120 * | +------+ +--------+ +----------------+ |
1121 * | | tee | | aqueue | | abin ... | |
1122 * | +-sink src-sink src-sink | |
1123 * | | | | +--------+ +----------------+ |
1125 * | | | | +------+ +------------+ +------+ +-----------+ |
1126 * | | | | |vqueue| | audioconv | | vis | | vbin ... | |
1127 * | | | src-sink src-sink + samp src-sink src-sink | |
1128 * | | | | +------+ +------------+ +------+ +-----------+ |
1132 * +-----------------------------------------------------------------------+
1135 gen_vis_element (GstPlayBin * play_bin)
1138 GstElement *element;
1146 GstElement *vqueue, *aqueue;
1149 /* errors are already posted when these fail. */
1150 asink = gen_audio_element (play_bin);
1153 vsink = gen_video_element (play_bin);
1155 gst_object_unref (asink);
1159 element = gst_bin_new ("visbin");
1160 tee = gst_element_factory_make ("tee", "tee");
1162 vqueue = gst_element_factory_make ("queue", "vqueue");
1163 aqueue = gst_element_factory_make ("queue", "aqueue");
1165 gst_bin_add (GST_BIN_CAST (element), asink);
1166 gst_bin_add (GST_BIN_CAST (element), vqueue);
1167 gst_bin_add (GST_BIN_CAST (element), aqueue);
1168 gst_bin_add (GST_BIN_CAST (element), vsink);
1169 gst_bin_add (GST_BIN_CAST (element), tee);
1171 conv = gst_element_factory_make ("audioconvert", "aconv");
1173 goto no_audioconvert;
1174 gst_bin_add (GST_BIN_CAST (element), conv);
1176 resamp = gst_element_factory_make ("audioresample", "aresamp");
1178 goto no_audioresample;
1179 gst_bin_add (GST_BIN_CAST (element), resamp);
1181 conv2 = gst_element_factory_make ("audioconvert", "aconv2");
1183 goto no_audioconvert;
1184 gst_bin_add (GST_BIN_CAST (element), conv2);
1186 if (play_bin->visualisation) {
1187 gst_object_ref (play_bin->visualisation);
1188 vis = play_bin->visualisation;
1190 vis = gst_element_factory_make ("goom", "vis");
1194 gst_bin_add (GST_BIN_CAST (element), vis);
1196 res = gst_element_link_pads (vqueue, "src", conv, "sink");
1197 res &= gst_element_link_pads (conv, "src", resamp, "sink");
1198 res &= gst_element_link_pads (resamp, "src", conv2, "sink");
1199 res &= gst_element_link_pads (conv2, "src", vis, "sink");
1200 res &= gst_element_link_pads (vis, "src", vsink, "sink");
1204 pad = gst_element_get_pad (aqueue, "sink");
1205 rpad = gst_element_get_request_pad (tee, "src%d");
1206 gst_pad_link (rpad, pad);
1207 gst_object_unref (rpad);
1208 gst_object_unref (pad);
1209 gst_element_link_pads (aqueue, "src", asink, "sink");
1211 pad = gst_element_get_pad (vqueue, "sink");
1212 rpad = gst_element_get_request_pad (tee, "src%d");
1213 gst_pad_link (rpad, pad);
1214 gst_object_unref (rpad);
1215 gst_object_unref (pad);
1217 pad = gst_element_get_pad (tee, "sink");
1218 gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
1219 gst_object_unref (pad);
1226 post_missing_element_message (play_bin, "audioconvert");
1227 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1228 (_("Missing element '%s' - check your GStreamer installation."),
1229 "audioconvert"), ("possibly a liboil version mismatch?"));
1230 gst_object_unref (element);
1235 post_missing_element_message (play_bin, "audioresample");
1236 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1237 (_("Missing element '%s' - check your GStreamer installation."),
1238 "audioresample"), (NULL));
1239 gst_object_unref (element);
1244 post_missing_element_message (play_bin, "goom");
1245 GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
1246 (_("Missing element '%s' - check your GStreamer installation."),
1248 gst_object_unref (element);
1253 GST_ELEMENT_ERROR (play_bin, CORE, PAD,
1254 (NULL), ("Failed to configure the visualisation element."));
1255 gst_object_unref (element);
1260 /* get rid of all installed sinks */
1262 remove_sinks (GstPlayBin * play_bin)
1266 GstElement *element;
1269 if (play_bin->cache == NULL)
1272 GST_DEBUG ("removesinks");
1273 element = g_hash_table_lookup (play_bin->cache, "abin");
1274 if (element != NULL) {
1275 parent = gst_element_get_parent (element);
1276 if (parent != NULL) {
1277 /* we remove the element from the parent so that
1278 * there is no unwanted state change when the parent
1280 play_bin->sinks = g_list_remove (play_bin->sinks, element);
1281 gst_element_set_state (element, GST_STATE_NULL);
1282 gst_bin_remove (GST_BIN_CAST (parent), element);
1283 gst_object_unref (parent);
1285 pad = gst_element_get_pad (element, "sink");
1287 peer = gst_pad_get_peer (pad);
1289 gst_pad_unlink (peer, pad);
1290 gst_object_unref (peer);
1292 gst_object_unref (pad);
1295 element = g_hash_table_lookup (play_bin->cache, "vbin");
1296 if (element != NULL) {
1297 parent = gst_element_get_parent (element);
1298 if (parent != NULL) {
1299 play_bin->sinks = g_list_remove (play_bin->sinks, element);
1300 gst_element_set_state (element, GST_STATE_NULL);
1301 gst_bin_remove (GST_BIN_CAST (parent), element);
1302 gst_object_unref (parent);
1304 pad = gst_element_get_pad (element, "sink");
1306 peer = gst_pad_get_peer (pad);
1308 gst_pad_unlink (peer, pad);
1309 gst_object_unref (peer);
1311 gst_object_unref (pad);
1315 for (sinks = play_bin->sinks; sinks; sinks = g_list_next (sinks)) {
1316 GstElement *element = GST_ELEMENT_CAST (sinks->data);
1320 pad = gst_element_get_pad (element, "sink");
1322 GST_LOG ("removing sink %p", element);
1324 peer = gst_pad_get_peer (pad);
1326 gst_pad_unlink (peer, pad);
1327 gst_object_unref (peer);
1329 gst_object_unref (pad);
1331 gst_element_set_state (element, GST_STATE_NULL);
1332 gst_bin_remove (GST_BIN_CAST (play_bin), element);
1334 g_list_free (play_bin->sinks);
1335 play_bin->sinks = NULL;
1337 if (play_bin->visualisation) {
1338 GstElement *vis_bin;
1341 GST_ELEMENT_CAST (gst_element_get_parent (play_bin->visualisation));
1343 gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
1346 gst_bin_remove (GST_BIN_CAST (vis_bin), play_bin->visualisation);
1347 gst_object_unref (vis_bin);
1351 if (play_bin->frame) {
1352 gst_buffer_unref (play_bin->frame);
1353 play_bin->frame = NULL;
1356 if (play_bin->textoverlay_element) {
1357 gst_object_unref (play_bin->textoverlay_element);
1358 play_bin->textoverlay_element = NULL;
1362 /* loop over the streams and set up the pipeline to play this
1363 * media file. First we count the number of audio and video streams.
1364 * If there is no video stream but there exists an audio stream,
1365 * we install a visualisation pipeline.
1367 * Also make sure to only connect the first audio and video pad. FIXME
1368 * this should eventually be handled with a tuner interface so that
1369 * one can switch the streams.
1371 * This function takes ownership of @sink.*
1374 add_sink (GstPlayBin * play_bin, GstElement * sink, GstPad * srcpad,
1375 GstPad * subtitle_pad)
1378 GstPadLinkReturn linkres;
1380 GstStateChangeReturn stateret;
1383 g_return_val_if_fail (sink != NULL, FALSE);
1385 state = GST_STATE_PAUSED;
1387 /* this is only for debugging */
1388 parent = gst_pad_get_parent_element (srcpad);
1390 GST_DEBUG ("Adding sink %" GST_PTR_FORMAT
1391 " with state %d (parent: %d, peer: %d)", sink,
1392 GST_STATE (sink), GST_STATE (play_bin), GST_STATE (parent));
1393 gst_object_unref (parent);
1395 gst_bin_add (GST_BIN_CAST (play_bin), sink);
1397 /* bring it to the required state so we can link to the peer without
1398 * breaking the flow */
1399 stateret = gst_element_set_state (sink, state);
1400 if (stateret == GST_STATE_CHANGE_FAILURE)
1403 /* we found a sink for this stream, now try to install it */
1404 sinkpad = gst_element_get_pad (sink, "sink");
1405 linkres = gst_pad_link (srcpad, sinkpad);
1406 gst_object_unref (sinkpad);
1408 /* try to link the pad of the sink to the stream */
1409 if (GST_PAD_LINK_FAILED (linkres))
1412 if (GST_IS_PAD (subtitle_pad)) {
1413 sinkpad = gst_element_get_pad (sink, "text_sink");
1414 linkres = gst_pad_link (subtitle_pad, sinkpad);
1415 gst_object_unref (sinkpad);
1418 /* try to link the subtitle pad of the sink to the stream, this is not
1420 if (GST_PAD_LINK_FAILED (linkres))
1421 goto subtitle_failed;
1424 /* we got the sink succesfully linked, now keep the sink
1425 * in our internal list */
1426 play_bin->sinks = g_list_prepend (play_bin->sinks, sink);
1433 gst_element_set_state (sink, GST_STATE_NULL);
1434 gst_bin_remove (GST_BIN_CAST (play_bin), sink);
1435 GST_DEBUG_OBJECT (play_bin, "state change failure when adding sink");
1443 /* could not link this stream */
1444 caps = gst_pad_get_caps (srcpad);
1445 capsstr = gst_caps_to_string (caps);
1446 g_warning ("could not link %s: %d", capsstr, linkres);
1447 GST_DEBUG_OBJECT (play_bin,
1448 "link failed when adding sink, caps %s, reason %d", capsstr, linkres);
1450 gst_caps_unref (caps);
1452 gst_element_set_state (sink, GST_STATE_NULL);
1453 gst_bin_remove (GST_BIN_CAST (play_bin), sink);
1460 /* could not link this stream */
1461 caps = gst_pad_get_caps (subtitle_pad);
1462 GST_WARNING_OBJECT (play_bin, "subtitle link failed when adding sink, "
1463 "caps = %" GST_PTR_FORMAT ", reason %d", caps, linkres);
1464 gst_caps_unref (caps);
1472 dummy_blocked_cb (GstPad * pad, gboolean blocked, gpointer user_data)
1477 setup_sinks (GstPlayBaseBin * play_base_bin, GstPlayBaseGroup * group)
1479 GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin);
1480 GList *streaminfo = NULL, *s;
1481 gboolean need_vis = FALSE;
1482 gboolean need_text = FALSE;
1483 GstPad *textsrcpad = NULL, *pad = NULL, *origtextsrcpad = NULL;
1485 gboolean res = TRUE;
1487 /* get rid of existing sinks */
1488 if (play_bin->sinks) {
1489 remove_sinks (play_bin);
1491 GST_DEBUG_OBJECT (play_base_bin, "setupsinks");
1493 /* find out what to do */
1494 if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0 &&
1495 group->type[GST_STREAM_TYPE_TEXT - 1].npads > 0) {
1497 } else if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads == 0 &&
1498 group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0 &&
1499 play_bin->visualisation != NULL) {
1503 /* now actually connect everything */
1504 g_object_get (G_OBJECT (play_base_bin), "stream-info", &streaminfo, NULL);
1505 for (s = streaminfo; s; s = g_list_next (s)) {
1506 GObject *obj = G_OBJECT (s->data);
1510 g_object_get (obj, "type", &type, NULL);
1511 g_object_get (obj, "object", &object, NULL);
1515 if (group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0) {
1517 sink = gen_vis_element (play_bin);
1519 sink = gen_audio_element (play_bin);
1524 pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll,
1526 res = add_sink (play_bin, sink, pad, NULL);
1527 gst_object_unref (pad);
1531 if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0) {
1533 GstObject *parent = NULL, *grandparent = NULL;
1534 GstPad *ghost = NULL;
1536 sink = gen_text_element (play_bin);
1538 gst_element_get_pad (group->type[GST_STREAM_TYPE_TEXT - 1].preroll,
1541 /* This pad is from subtitle-bin, we need to create a ghost pad to have
1542 common grandparents */
1543 parent = gst_object_get_parent (GST_OBJECT_CAST (textsrcpad));
1545 GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no parent !");
1546 gst_object_unref (textsrcpad);
1551 grandparent = gst_object_get_parent (parent);
1553 GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no grandparent !");
1554 gst_object_unref (parent);
1555 gst_object_unref (textsrcpad);
1560 /* We ghost the pad on subtitle_bin only, if the text pad is from the
1561 media demuxer we keep it as it is */
1562 if (!GST_IS_PLAY_BIN (grandparent)) {
1563 GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from a subtitle "
1564 "file, ghosting to a suitable hierarchy");
1565 /* Block the pad first, because as soon as we add a ghostpad, the queue
1566 * will try and start pushing */
1567 gst_pad_set_blocked_async (textsrcpad, TRUE, dummy_blocked_cb, NULL);
1568 origtextsrcpad = gst_object_ref (textsrcpad);
1570 ghost = gst_ghost_pad_new ("text_src", textsrcpad);
1571 if (!GST_IS_PAD (ghost)) {
1572 GST_WARNING_OBJECT (textsrcpad, "failed creating ghost pad for "
1574 gst_object_unref (parent);
1575 gst_object_unref (grandparent);
1576 gst_object_unref (textsrcpad);
1581 gst_pad_set_active (ghost, TRUE);
1582 if (gst_element_add_pad (GST_ELEMENT_CAST (grandparent), ghost)) {
1583 gst_object_unref (textsrcpad);
1584 textsrcpad = gst_object_ref (ghost);
1586 GST_WARNING_OBJECT (ghost, "failed adding ghost pad on subtitle-bin");
1587 gst_pad_set_active (ghost, FALSE);
1588 gst_object_unref (ghost);
1589 gst_object_unref (textsrcpad);
1593 GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from the demuxer "
1594 "no changes to hierarchy needed");
1597 gst_object_unref (parent);
1598 gst_object_unref (grandparent);
1600 sink = gen_video_element (play_bin);
1605 pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll,
1607 res = add_sink (play_bin, sink, pad, textsrcpad);
1608 gst_object_unref (pad);
1610 gst_object_unref (textsrcpad);
1611 if (origtextsrcpad) {
1612 gst_pad_set_blocked_async (origtextsrcpad, FALSE, dummy_blocked_cb, NULL);
1613 gst_object_unref (origtextsrcpad);
1617 /* remove the sinks now, pipeline get_state will now wait for the
1618 * sinks to preroll */
1619 if (play_bin->fakesink) {
1620 gst_element_set_state (play_bin->fakesink, GST_STATE_NULL);
1621 gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink);
1622 play_bin->fakesink = NULL;
1628 /* Send an event to our sinks until one of them works; don't then send to the
1629 * remaining sinks (unlike GstBin)
1632 gst_play_bin_send_event_to_sink (GstPlayBin * play_bin, GstEvent * event)
1634 GList *sinks = play_bin->sinks;
1635 gboolean res = TRUE;
1638 GstElement *sink = GST_ELEMENT_CAST (sinks->data);
1640 gst_event_ref (event);
1641 if ((res = gst_element_send_event (sink, event))) {
1642 GST_DEBUG_OBJECT (play_bin,
1643 "Sent event succesfully to sink %" GST_PTR_FORMAT, sink);
1646 GST_DEBUG_OBJECT (play_bin,
1647 "Event failed when sent to sink %" GST_PTR_FORMAT, sink);
1649 sinks = g_list_next (sinks);
1652 gst_event_unref (event);
1657 /* We only want to send the event to a single sink (overriding GstBin's
1658 * behaviour), but we want to keep GstPipeline's behaviour - wrapping seek
1659 * events appropriately. So, this is a messy duplication of code. */
1661 gst_play_bin_send_event (GstElement * element, GstEvent * event)
1663 gboolean res = FALSE;
1664 GstEventType event_type = GST_EVENT_TYPE (event);
1666 switch (event_type) {
1667 case GST_EVENT_SEEK:
1668 GST_DEBUG_OBJECT (element, "Sending seek event to a sink");
1669 res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event);
1672 res = parent_class->send_event (element, event);
1680 value_list_append_structure_list (GValue * list_val, GstStructure ** first,
1681 GList * structure_list)
1685 for (l = structure_list; l != NULL; l = l->next) {
1686 GValue val = { 0, };
1689 *first = gst_structure_copy ((GstStructure *) l->data);
1691 g_value_init (&val, GST_TYPE_STRUCTURE);
1692 g_value_take_boxed (&val, gst_structure_copy ((GstStructure *) l->data));
1693 gst_value_list_append_value (list_val, &val);
1694 g_value_unset (&val);
1698 /* if it's a redirect message with multiple redirect locations we might
1699 * want to pick a different 'best' location depending on the required
1700 * bitrates and the connection speed */
1702 gst_play_bin_handle_redirect_message (GstPlayBin * playbin, GstMessage * msg)
1704 const GValue *locations_list, *location_val;
1705 GstMessage *new_msg;
1706 GstStructure *new_structure = NULL;
1707 GList *l_good = NULL, *l_neutral = NULL, *l_bad = NULL;
1708 GValue new_list = { 0, };
1710 GstPlayBaseBin *playbasebin = GST_PLAY_BASE_BIN (playbin);
1711 guint connection_speed = playbasebin->connection_speed;
1713 GST_DEBUG_OBJECT (playbin, "redirect message: %" GST_PTR_FORMAT, msg);
1714 GST_DEBUG_OBJECT (playbin, "connection speed: %u", connection_speed);
1716 if (connection_speed == 0 || msg->structure == NULL)
1719 locations_list = gst_structure_get_value (msg->structure, "locations");
1720 if (locations_list == NULL)
1723 size = gst_value_list_get_size (locations_list);
1727 /* maintain existing order as much as possible, just sort references
1728 * with too high a bitrate to the end (the assumption being that if
1729 * bitrates are given they are given for all interesting streams and
1730 * that the you-need-at-least-version-xyz redirect has the same bitrate
1731 * as the lowest referenced redirect alternative) */
1732 for (i = 0; i < size; ++i) {
1733 const GstStructure *s;
1736 location_val = gst_value_list_get_value (locations_list, i);
1737 s = (const GstStructure *) g_value_get_boxed (location_val);
1738 if (!gst_structure_get_int (s, "minimum-bitrate", &bitrate) || bitrate <= 0) {
1739 GST_DEBUG_OBJECT (playbin, "no bitrate: %" GST_PTR_FORMAT, s);
1740 l_neutral = g_list_append (l_neutral, (gpointer) s);
1741 } else if (bitrate > connection_speed) {
1742 GST_DEBUG_OBJECT (playbin, "bitrate too high: %" GST_PTR_FORMAT, s);
1743 l_bad = g_list_append (l_bad, (gpointer) s);
1744 } else if (bitrate <= connection_speed) {
1745 GST_DEBUG_OBJECT (playbin, "bitrate OK: %" GST_PTR_FORMAT, s);
1746 l_good = g_list_append (l_good, (gpointer) s);
1750 g_value_init (&new_list, GST_TYPE_LIST);
1751 value_list_append_structure_list (&new_list, &new_structure, l_good);
1752 value_list_append_structure_list (&new_list, &new_structure, l_neutral);
1753 value_list_append_structure_list (&new_list, &new_structure, l_bad);
1754 gst_structure_set_value (new_structure, "locations", &new_list);
1755 g_value_unset (&new_list);
1757 g_list_free (l_good);
1758 g_list_free (l_neutral);
1759 g_list_free (l_bad);
1761 new_msg = gst_message_new_element (msg->src, new_structure);
1762 gst_message_unref (msg);
1764 GST_DEBUG_OBJECT (playbin, "new redirect message: %" GST_PTR_FORMAT, new_msg);
1769 gst_play_bin_handle_message (GstBin * bin, GstMessage * msg)
1771 if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ELEMENT && msg->structure != NULL
1772 && gst_structure_has_name (msg->structure, "redirect")) {
1773 msg = gst_play_bin_handle_redirect_message (GST_PLAY_BIN (bin), msg);
1776 GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
1779 static GstStateChangeReturn
1780 gst_play_bin_change_state (GstElement * element, GstStateChange transition)
1782 GstStateChangeReturn ret;
1783 GstPlayBin *play_bin;
1785 play_bin = GST_PLAY_BIN (element);
1788 switch (transition) {
1789 case GST_STATE_CHANGE_READY_TO_PAUSED:
1790 /* this really is the easiest way to make the state change return
1791 * ASYNC until we added the sinks */
1792 if (!play_bin->fakesink) {
1793 play_bin->fakesink = gst_element_factory_make ("fakesink", "test");
1794 gst_bin_add (GST_BIN_CAST (play_bin), play_bin->fakesink);
1801 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1802 if (ret == GST_STATE_CHANGE_FAILURE)
1805 switch (transition) {
1806 case GST_STATE_CHANGE_READY_TO_PAUSED:
1807 /* remember us being a live pipeline */
1808 play_bin->is_live = (ret == GST_STATE_CHANGE_NO_PREROLL);
1809 GST_DEBUG_OBJECT (play_bin, "is live: %d", play_bin->is_live);
1811 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1812 /* FIXME Release audio device when we implement that */
1814 case GST_STATE_CHANGE_PAUSED_TO_READY:
1815 case GST_STATE_CHANGE_READY_TO_NULL:
1816 /* remove sinks we added */
1817 remove_sinks (play_bin);
1818 /* and there might be a fakesink we need to clean up now */
1819 if (play_bin->fakesink) {
1820 gst_element_set_state (play_bin->fakesink, GST_STATE_NULL);
1821 gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink);
1822 play_bin->fakesink = NULL;
1833 gst_play_bin_plugin_init (GstPlugin * plugin)
1835 GST_DEBUG_CATEGORY_INIT (gst_play_bin_debug, "playbin", 0, "play bin");
1837 return gst_element_register (plugin, "playbin", GST_RANK_NONE,