/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-playbin * * * * Playbin provides a stand-alone everything-in-one abstraction for an * audio and/or video player. * * * It can handle both audio and video files and features * * * automatic file type recognition and based on that automatic * selection and usage of the right audio/video/subtitle demuxers/decoders * * * visualisations for audio files * * * subtitle support for video files * * * stream selection between different audio/subtitles streams * * * meta info (tag) extraction * * * easy access to the last video frame * * * buffering when playing streams over a network * * * volume control * * * * Usage * * A playbin element can be created just like any other element using * gst_element_factory_make(). The file/URI to play should be set via the "uri" * property. This must be an absolute URI, relative file paths are not allowed. * Example URIs are file:///home/joe/movie.avi or http://www.joedoe.com/foo.ogg * * * Playbin is a #GstPipeline. It will notify the application of everything * that's happening (errors, end of stream, tags found, state changes, etc.) * by posting messages on its #GstBus. The application needs to watch the * bus. * * * Playback can be initiated by setting the element to PLAYING state using * gst_element_set_state(). Note that the state change will take place in * the background in a separate thread, when the function returns playback * is probably not happening yet and any errors might not have occured yet. * Applications using playbin should ideally be written to deal with things * completely asynchroneous. * * * When playback has finished (an EOS message has been received on the bus) * or an error has occured (an ERROR message has been received on the bus) or * the user wants to play a different track, playbin should be set back to * READY or NULL state, then the "uri" property should be set to the new * location and then playbin be set to PLAYING state again. * * * Seeking can be done using gst_element_seek_simple() or gst_element_seek() * on the playbin element. Again, the seek will not be executed * instantaneously, but will be done in a background thread. When the seek * call returns the seek will most likely still be in process. An application * may wait for the seek to finish (or fail) using gst_element_get_state() with * -1 as the timeout, but this will block the user interface and is not * recommended at all. * * * Applications may query the current position and duration of the stream * via gst_element_query_position() and gst_element_query_duration() and * setting the format passed to GST_FORMAT_TIME. If the query was successful, * the duration or position will have been returned in units of nanoseconds. * * Advanced Usage: specifying the audio and video sink * * By default, if no audio sink or video sink has been specified via the * "audio-sink" or "video-sink" property, playbin will use the autoaudiosink * and autovideosink elements to find the first-best available output method. * This should work in most cases, but is not always desirable. Often either * the user or application might want to specify more explicitly what to use * for audio and video output. * * * If the application wants more control over how audio or video should be * output, it may create the audio/video sink elements itself (for example * using gst_element_factory_make()) and provide them to playbin using the * "audio-sink" or "video-sink" property. * * * GNOME-based applications, for example, will usually want to create * gconfaudiosink and gconfvideosink elements and make playbin use those, * so that output happens to whatever the user has configured in the GNOME * Multimedia System Selector confinguration dialog. * * * The sink elements do not necessarily need to be ready-made sinks. It is * possible to create container elements that look like a sink to playbin, * but in reality contain a number of custom elements linked together. This * can be achieved by creating a #GstBin and putting elements in there and * linking them, and then creating a sink #GstGhostPad for the bin and pointing * it to the sink pad of the first element within the bin. This can be used * for a number of purposes, for example to force output to a particular * format or to modify or observe the data before it is output. * * * It is also possible to 'suppress' audio and/or video output by using * 'fakesink' elements (or capture it from there using the fakesink element's * "handoff" signal, which, nota bene, is fired from the streaming thread!). * * Retrieving Tags and Other Meta Data * * Most of the common meta data (artist, title, etc.) can be retrieved by * watching for TAG messages on the pipeline's bus (see above). * * * Other more specific meta information like width/height/framerate of video * streams or samplerate/number of channels of audio streams can be obtained * using the "stream-info" property, which will return a GList of stream info * objects, one for each stream. These are opaque objects that can only be * accessed via the standard GObject property interface, ie. g_object_get(). * Each stream info object has the following properties: * * "object" (GstObject) (the decoder source pad usually) * "type" (enum) (if this is an audio/video/subtitle stream) * "decoder" (string) (name of decoder used to decode this stream) * "mute" (boolean) (to mute or unmute this stream) * "caps" (GstCaps) (caps of the decoded stream) * "language-code" (string) (ISO-639 language code for this stream, mostly used for audio/subtitle streams) * "codec" (string) (format this stream was encoded in) * * Stream information from the stream-info properties is best queried once * playbin has changed into PAUSED or PLAYING state (which can be detected * via a state-changed message on the bus where old_state=READY and * new_state=PAUSED), since before that the list might not be complete yet or * not contain all available information (like language-codes). * * Buffering status * * Playbin handles buffering automatically. When playbin is buffering, it * will post BUFFERING messages on the bus with a percentage value that * shows the progress of the buffering. Applications may want to show this * information to the user in some form or another. Here is how to extract * the percentage information from the message: * * * * switch (GST_MESSAGE_TYPE (msg)) { * case GST_MESSAGE_BUFFERING: { * gint percent = 0; * gst_structure_get_int (msg->structure, "buffer-percent", &percent); * g_print ("Buffering (%%u percent done)", percent); * break; * } * ... * } * * Note that application should keep the pipeline in the PAUSED state when a * GST_MESSAGE_BUFFERING message is received with a buffer-percent < 100. * * Embedding the video window in your application * * By default, playbin (or rather the video sinks used) will create their own * window. Applications will usually want to force output to a window of their * own, however. This can be done using the GstXOverlay interface, which most * video sinks implement. See the documentation there for more details. * * Specifying which CD/DVD device to use * * The device to use for CDs/DVDs needs to be set on the source element * playbin creates before it is opened. The only way to do this at the moment * is to connect to playbin's "notify::source" signal, which will be emitted * by playbin when it has created the source element for a particular URI. * In the signal callback you can check if the source element has a "device" * property and set it appropriately. In future ways might be added to specify * the device as part of the URI, but at the time of writing this is not * possible yet. * * Examples * * Here is a simple pipeline to play back a video or audio file: * * gst-launch -v playbin uri=file:///path/to/somefile.avi * * This will play back the given AVI video file, given that the video and * audio decoders required to decode the content are installed. Since no * special audio sink or video sink is supplied (not possible via gst-launch), * playbin will try to find a suitable audio and video sink automatically * using the autoaudiosink and autovideosink elements. * * * Here is a another pipeline to play track 4 of an audio CD: * * gst-launch -v playbin uri=cdda://4 * * This will play back track 4 on an audio CD in your disc drive (assuming * the drive is detected automatically by the plugin). * * * Here is a another pipeline to play title 1 of a DVD: * * gst-launch -v playbin uri=dvd://1 * * This will play back title 1 of a DVD in your disc drive (assuming * the drive is detected automatically by the plugin). * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "gstplaybasebin.h" GST_DEBUG_CATEGORY_STATIC (gst_play_bin_debug); #define GST_CAT_DEFAULT gst_play_bin_debug #define GST_TYPE_PLAY_BIN (gst_play_bin_get_type()) #define GST_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PLAY_BIN,GstPlayBin)) #define GST_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PLAY_BIN,GstPlayBinClass)) #define GST_IS_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PLAY_BIN)) #define GST_IS_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PLAY_BIN)) #define VOLUME_MAX_DOUBLE 10.0 #define CONNECTION_SPEED_DEFAULT 0 typedef struct _GstPlayBin GstPlayBin; typedef struct _GstPlayBinClass GstPlayBinClass; struct _GstPlayBin { GstPlayBaseBin parent; /* the configurable elements */ GstElement *fakesink; GstElement *audio_sink; GstElement *video_sink; GstElement *visualisation; GstElement *pending_visualisation; GstElement *volume_element; GstElement *textoverlay_element; gfloat volume; /* these are the currently active sinks */ GList *sinks; /* the last captured frame for snapshots */ GstBuffer *frame; /* our cache for the sinks */ GHashTable *cache; /* font description */ gchar *font_desc; /* connection speed in bits/sec (0 = unknown) */ guint connection_speed; /* indication if the pipeline is live */ gboolean is_live; }; struct _GstPlayBinClass { GstPlayBaseBinClass parent_class; }; /* props */ enum { ARG_0, ARG_AUDIO_SINK, ARG_VIDEO_SINK, ARG_VIS_PLUGIN, ARG_VOLUME, ARG_FRAME, ARG_FONT_DESC, ARG_CONNECTION_SPEED }; /* signals */ enum { LAST_SIGNAL }; static void gst_play_bin_class_init (GstPlayBinClass * klass); static void gst_play_bin_init (GstPlayBin * play_bin); static void gst_play_bin_dispose (GObject * object); static gboolean setup_sinks (GstPlayBaseBin * play_base_bin, GstPlayBaseGroup * group); static void remove_sinks (GstPlayBin * play_bin); static void gst_play_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * spec); static void gst_play_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * spec); static gboolean gst_play_bin_send_event (GstElement * element, GstEvent * event); static gboolean gst_play_bin_set_clock_func (GstElement * element, GstClock * clock); static GstStateChangeReturn gst_play_bin_change_state (GstElement * element, GstStateChange transition); static void gst_play_bin_handle_message (GstBin * bin, GstMessage * message); static GstElementClass *parent_class; //static guint gst_play_bin_signals[LAST_SIGNAL] = { 0 }; static const GstElementDetails gst_play_bin_details = GST_ELEMENT_DETAILS ("Player Bin", "Generic/Bin/Player", "Autoplug and play media from an uri", "Wim Taymans "); static GType gst_play_bin_get_type (void) { static GType gst_play_bin_type = 0; if (!gst_play_bin_type) { static const GTypeInfo gst_play_bin_info = { sizeof (GstPlayBinClass), NULL, NULL, (GClassInitFunc) gst_play_bin_class_init, NULL, NULL, sizeof (GstPlayBin), 0, (GInstanceInitFunc) gst_play_bin_init, NULL }; gst_play_bin_type = g_type_register_static (GST_TYPE_PLAY_BASE_BIN, "GstPlayBin", &gst_play_bin_info, 0); } return gst_play_bin_type; } static void gst_play_bin_class_init (GstPlayBinClass * klass) { GObjectClass *gobject_klass; GstElementClass *gstelement_klass; GstBinClass *gstbin_klass; GstPlayBaseBinClass *playbasebin_klass; gobject_klass = (GObjectClass *) klass; gstelement_klass = (GstElementClass *) klass; gstbin_klass = (GstBinClass *) klass; playbasebin_klass = (GstPlayBaseBinClass *) klass; parent_class = g_type_class_peek_parent (klass); gobject_klass->set_property = gst_play_bin_set_property; gobject_klass->get_property = gst_play_bin_get_property; g_object_class_install_property (gobject_klass, ARG_VIDEO_SINK, g_param_spec_object ("video-sink", "Video Sink", "the video output element to use (NULL = default sink)", GST_TYPE_ELEMENT, G_PARAM_READWRITE)); g_object_class_install_property (gobject_klass, ARG_AUDIO_SINK, g_param_spec_object ("audio-sink", "Audio Sink", "the audio output element to use (NULL = default sink)", GST_TYPE_ELEMENT, G_PARAM_READWRITE)); g_object_class_install_property (gobject_klass, ARG_VIS_PLUGIN, g_param_spec_object ("vis-plugin", "Vis plugin", "the visualization element to use (NULL = none)", GST_TYPE_ELEMENT, G_PARAM_READWRITE)); g_object_class_install_property (gobject_klass, ARG_VOLUME, g_param_spec_double ("volume", "volume", "volume", 0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE)); g_object_class_install_property (gobject_klass, ARG_FRAME, gst_param_spec_mini_object ("frame", "Frame", "The last frame (NULL = no video available)", GST_TYPE_BUFFER, G_PARAM_READABLE)); g_object_class_install_property (gobject_klass, ARG_FONT_DESC, g_param_spec_string ("subtitle-font-desc", "Subtitle font description", "Pango font description of font " "to be used for subtitle rendering", NULL, G_PARAM_WRITABLE)); /** * GstPlayBin::connection-speed * * Network connection speed in kbps (0 = unknown) * * Since: 0.10.10 **/ g_object_class_install_property (gobject_klass, ARG_CONNECTION_SPEED, g_param_spec_uint ("connection-speed", "Connection Speed", "Network connection speed in kbps (0 = unknown)", 0, G_MAXUINT, CONNECTION_SPEED_DEFAULT, G_PARAM_READWRITE)); gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_play_bin_dispose); gst_element_class_set_details (gstelement_klass, &gst_play_bin_details); gstelement_klass->change_state = GST_DEBUG_FUNCPTR (gst_play_bin_change_state); gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_bin_send_event); gstelement_klass->set_clock = GST_DEBUG_FUNCPTR (gst_play_bin_set_clock_func); gstbin_klass->handle_message = GST_DEBUG_FUNCPTR (gst_play_bin_handle_message); playbasebin_klass->setup_output_pads = setup_sinks; } static void gst_play_bin_init (GstPlayBin * play_bin) { play_bin->video_sink = NULL; play_bin->audio_sink = NULL; play_bin->visualisation = NULL; play_bin->pending_visualisation = NULL; play_bin->volume_element = NULL; play_bin->textoverlay_element = NULL; play_bin->volume = 1.0; play_bin->sinks = NULL; play_bin->frame = NULL; play_bin->font_desc = NULL; play_bin->cache = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, (GDestroyNotify) gst_object_unref); } static void gst_play_bin_dispose (GObject * object) { GstPlayBin *play_bin; play_bin = GST_PLAY_BIN (object); if (play_bin->cache != NULL) { remove_sinks (play_bin); g_hash_table_destroy (play_bin->cache); play_bin->cache = NULL; } if (play_bin->audio_sink != NULL) { gst_element_set_state (play_bin->audio_sink, GST_STATE_NULL); gst_object_unref (play_bin->audio_sink); play_bin->audio_sink = NULL; } if (play_bin->video_sink != NULL) { gst_element_set_state (play_bin->video_sink, GST_STATE_NULL); gst_object_unref (play_bin->video_sink); play_bin->video_sink = NULL; } if (play_bin->visualisation != NULL) { gst_element_set_state (play_bin->visualisation, GST_STATE_NULL); gst_object_unref (play_bin->visualisation); play_bin->visualisation = NULL; } if (play_bin->pending_visualisation != NULL) { gst_element_set_state (play_bin->pending_visualisation, GST_STATE_NULL); gst_object_unref (play_bin->pending_visualisation); play_bin->pending_visualisation = NULL; } if (play_bin->textoverlay_element != NULL) { gst_object_unref (play_bin->textoverlay_element); play_bin->textoverlay_element = NULL; } g_free (play_bin->font_desc); play_bin->font_desc = NULL; G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_play_bin_vis_unblocked (GstPad * tee_pad, gboolean blocked, gpointer user_data) { /* Unblocked */ } static void gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked, gpointer user_data) { GstPlayBin *play_bin = GST_PLAY_BIN (user_data); GstBin *vis_bin = NULL; GstPad *vis_sink_pad = NULL, *vis_src_pad = NULL, *vqueue_pad = NULL; GstState bin_state; /* We want to disable visualisation */ if (!GST_IS_ELEMENT (play_bin->pending_visualisation)) { /* Set visualisation element to READY */ gst_element_set_state (play_bin->visualisation, GST_STATE_READY); goto beach; } vis_bin = GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin-> visualisation))); if (!GST_IS_BIN (vis_bin) || !GST_IS_PAD (tee_pad)) { goto beach; } vis_src_pad = gst_element_get_pad (play_bin->visualisation, "src"); vis_sink_pad = gst_pad_get_peer (tee_pad); /* Can be fakesink */ if (GST_IS_PAD (vis_src_pad)) { vqueue_pad = gst_pad_get_peer (vis_src_pad); } if (!GST_IS_PAD (vis_sink_pad)) { goto beach; } /* Check the bin's state */ GST_OBJECT_LOCK (vis_bin); bin_state = GST_STATE (vis_bin); GST_OBJECT_UNLOCK (vis_bin); /* Unlink */ gst_pad_unlink (tee_pad, vis_sink_pad); gst_object_unref (vis_sink_pad); vis_sink_pad = NULL; if (GST_IS_PAD (vqueue_pad)) { gst_pad_unlink (vis_src_pad, vqueue_pad); gst_object_unref (vis_src_pad); vis_src_pad = NULL; } /* Remove from vis_bin */ gst_bin_remove (vis_bin, play_bin->visualisation); /* Set state to NULL */ gst_element_set_state (play_bin->visualisation, GST_STATE_NULL); /* And loose our ref */ gst_object_unref (play_bin->visualisation); if (play_bin->pending_visualisation) { /* Ref this new visualisation element before adding to the bin */ gst_object_ref (play_bin->pending_visualisation); /* Add the new one */ gst_bin_add (vis_bin, play_bin->pending_visualisation); /* Synchronizing state */ gst_element_set_state (play_bin->pending_visualisation, bin_state); vis_sink_pad = gst_element_get_pad (play_bin->pending_visualisation, "sink"); vis_src_pad = gst_element_get_pad (play_bin->pending_visualisation, "src"); if (!GST_IS_PAD (vis_sink_pad) || !GST_IS_PAD (vis_src_pad)) { goto beach; } /* Link */ gst_pad_link (tee_pad, vis_sink_pad); gst_pad_link (vis_src_pad, vqueue_pad); } /* We are done */ gst_object_unref (play_bin->visualisation); play_bin->visualisation = play_bin->pending_visualisation; play_bin->pending_visualisation = NULL; beach: if (vis_sink_pad) { gst_object_unref (vis_sink_pad); } if (vis_src_pad) { gst_object_unref (vis_src_pad); } if (vqueue_pad) { gst_object_unref (vqueue_pad); } if (vis_bin) { gst_object_unref (vis_bin); } /* Unblock the pad */ gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked, play_bin); } static void gst_play_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstPlayBin *play_bin; play_bin = GST_PLAY_BIN (object); switch (prop_id) { case ARG_VIDEO_SINK: if (play_bin->video_sink != NULL) { gst_object_unref (play_bin->video_sink); } play_bin->video_sink = g_value_get_object (value); if (play_bin->video_sink != NULL) { gst_object_ref (play_bin->video_sink); gst_object_sink (GST_OBJECT_CAST (play_bin->video_sink)); } /* when changing the videosink, we just remove the * video pipeline from the cache so that it will be * regenerated with the new sink element */ g_hash_table_remove (play_bin->cache, "vbin"); break; case ARG_AUDIO_SINK: if (play_bin->audio_sink != NULL) { gst_object_unref (play_bin->audio_sink); } play_bin->audio_sink = g_value_get_object (value); if (play_bin->audio_sink != NULL) { gst_object_ref (play_bin->audio_sink); gst_object_sink (GST_OBJECT_CAST (play_bin->audio_sink)); } g_hash_table_remove (play_bin->cache, "abin"); break; case ARG_VIS_PLUGIN: { /* Do we already have a visualisation change pending ? */ if (play_bin->pending_visualisation) { gst_object_unref (play_bin->pending_visualisation); play_bin->pending_visualisation = g_value_get_object (value); /* Take ownership */ if (play_bin->pending_visualisation) { gst_object_ref (play_bin->pending_visualisation); gst_object_sink (GST_OBJECT_CAST (play_bin->pending_visualisation)); } } else { play_bin->pending_visualisation = g_value_get_object (value); /* Take ownership */ if (play_bin->pending_visualisation) { gst_object_ref (play_bin->pending_visualisation); gst_object_sink (GST_OBJECT_CAST (play_bin->pending_visualisation)); } /* Was there a visualisation already set ? */ if (play_bin->visualisation != NULL) { GstBin *vis_bin = NULL; vis_bin = GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin-> visualisation))); /* Check if the visualisation is already in a bin */ if (GST_IS_BIN (vis_bin)) { GstPad *vis_sink_pad = NULL, *tee_pad = NULL; /* Now get tee pad and block it async */ vis_sink_pad = gst_element_get_pad (play_bin->visualisation, "sink"); if (!GST_IS_PAD (vis_sink_pad)) { goto beach; } tee_pad = gst_pad_get_peer (vis_sink_pad); if (!GST_IS_PAD (tee_pad)) { goto beach; } /* Block with callback */ gst_pad_set_blocked_async (tee_pad, TRUE, gst_play_bin_vis_blocked, play_bin); beach: if (vis_sink_pad) { gst_object_unref (vis_sink_pad); } if (tee_pad) { gst_object_unref (tee_pad); } gst_object_unref (vis_bin); } else { play_bin->visualisation = play_bin->pending_visualisation; play_bin->pending_visualisation = NULL; } } else { play_bin->visualisation = play_bin->pending_visualisation; play_bin->pending_visualisation = NULL; } } break; } case ARG_VOLUME: play_bin->volume = g_value_get_double (value); if (play_bin->volume_element) { g_object_set (G_OBJECT (play_bin->volume_element), "volume", play_bin->volume, NULL); } break; case ARG_FONT_DESC: g_free (play_bin->font_desc); play_bin->font_desc = g_strdup (g_value_get_string (value)); if (play_bin->textoverlay_element) { g_object_set (G_OBJECT (play_bin->textoverlay_element), "font-desc", g_value_get_string (value), NULL); } break; case ARG_CONNECTION_SPEED: play_bin->connection_speed = g_value_get_uint (value) * 1000; break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_play_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstPlayBin *play_bin; play_bin = GST_PLAY_BIN (object); switch (prop_id) { case ARG_VIDEO_SINK: g_value_set_object (value, play_bin->video_sink); break; case ARG_AUDIO_SINK: g_value_set_object (value, play_bin->audio_sink); break; case ARG_VIS_PLUGIN: g_value_set_object (value, play_bin->visualisation); break; case ARG_VOLUME: g_value_set_double (value, play_bin->volume); break; case ARG_FRAME: gst_value_set_mini_object (value, GST_MINI_OBJECT (play_bin->frame)); break; case ARG_CONNECTION_SPEED: g_value_set_uint (value, play_bin->connection_speed / 1000); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* signal fired when the identity has received a new buffer. This is used for * making screenshots. */ static void handoff (GstElement * identity, GstBuffer * frame, gpointer data) { GstPlayBin *play_bin = GST_PLAY_BIN (data); GstBuffer **frame_p = &play_bin->frame; gst_mini_object_replace ((GstMiniObject **) frame_p, GST_MINI_OBJECT_CAST (frame)); /* applications need to know the buffer caps, * make sure they are always set on the frame */ if (GST_BUFFER_CAPS (play_bin->frame) == NULL) { GstPad *pad; if ((pad = gst_element_get_pad (identity, "sink"))) { gst_buffer_set_caps (play_bin->frame, GST_PAD_CAPS (pad)); gst_object_unref (pad); } } } /* make the element (bin) that contains the elements needed to perform * video display. We connect a handoff signal to identity so that we * can grab snapshots. Identity's sinkpad is ghosted to vbin. * * +-------------------------------------------------------------+ * | vbin | * | +--------+ +----------+ +----------+ +---------+ | * | |identity| |colorspace| |videoscale| |videosink| | * | +-sink src-sink src-sink src-sink | | * | | +---+----+ +----------+ +----------+ +---------+ | * sink-+ | | * +----------|--------------------------------------------------+ * handoff */ static GstElement * gen_video_element (GstPlayBin * play_bin) { GstElement *element; GstElement *conv; GstElement *scale; GstElement *sink; GstElement *identity; GstPad *pad; /* first see if we have it in the cache */ element = g_hash_table_lookup (play_bin->cache, "vbin"); if (element != NULL) { return element; } if (play_bin->video_sink) { sink = play_bin->video_sink; } else { sink = gst_element_factory_make ("autovideosink", "videosink"); if (sink == NULL) { sink = gst_element_factory_make ("xvimagesink", "videosink"); } if (sink == NULL) goto no_sinks; } gst_object_ref (sink); g_hash_table_insert (play_bin->cache, "video_sink", sink); /* create a bin to hold objects, as we create them we add them to this bin so * that when something goes wrong we only need to unref the bin */ element = gst_bin_new ("vbin"); gst_bin_add (GST_BIN_CAST (element), sink); conv = gst_element_factory_make ("ffmpegcolorspace", "vconv"); if (conv == NULL) goto no_colorspace; gst_bin_add (GST_BIN_CAST (element), conv); scale = gst_element_factory_make ("videoscale", "vscale"); if (scale == NULL) goto no_videoscale; gst_bin_add (GST_BIN_CAST (element), scale); identity = gst_element_factory_make ("identity", "id"); g_object_set (identity, "silent", TRUE, NULL); g_signal_connect (identity, "handoff", G_CALLBACK (handoff), play_bin); gst_bin_add (GST_BIN_CAST (element), identity); gst_element_link_pads (identity, "src", conv, "sink"); gst_element_link_pads (conv, "src", scale, "sink"); /* be more careful with the pad from the custom sink element, it might not * be named 'sink' */ if (!gst_element_link_pads (scale, "src", sink, NULL)) goto link_failed; pad = gst_element_get_pad (identity, "sink"); gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad)); gst_object_unref (pad); gst_element_set_state (element, GST_STATE_READY); /* since we're gonna add it to a bin but don't want to lose it, * we keep a reference. */ gst_object_ref (element); g_hash_table_insert (play_bin->cache, "vbin", element); return element; /* ERRORS */ no_sinks: { /* FIXME: this warrants adding a CORE error category for missing * elements/plugins */ GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Both autovideosink and xvimagesink elements are missing.")), (NULL)); return NULL; } no_colorspace: { GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "ffmpegcolorspace"), (NULL)); gst_object_unref (element); return NULL; } no_videoscale: { GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "videoscale"), ("possibly a liboil version mismatch?")); gst_object_unref (element); return NULL; } link_failed: { GST_ELEMENT_ERROR (play_bin, CORE, PAD, (NULL), ("Failed to configure the video sink.")); gst_object_unref (element); return NULL; } } /* make an element for playback of video with subtitles embedded. * * +--------------------------------------------------+ * | tbin +-------------+ | * | +-----+ | textoverlay | +------+ | * | | csp | +--video_sink | | vbin | | * video_sink-sink src+ +-text_sink src-sink | | * | +-----+ | +-------------+ +------+ | * text_sink-------------+ | * +--------------------------------------------------+ * * If there is no subtitle renderer this function will simply return the * videosink without the text_sink pad. */ static GstElement * gen_text_element (GstPlayBin * play_bin) { GstElement *element, *csp, *overlay, *vbin; GstPad *pad; /* Create the video rendering bin, error is posted when this fails. */ vbin = gen_video_element (play_bin); if (!vbin) return NULL; /* Text overlay */ overlay = gst_element_factory_make ("textoverlay", "overlay"); /* If no overlay return the video bin without subtitle support. */ if (!overlay) goto no_overlay; /* Create our bin */ element = gst_bin_new ("textbin"); /* Set some parameters */ g_object_set (G_OBJECT (overlay), "halign", "center", "valign", "bottom", NULL); if (play_bin->font_desc) { g_object_set (G_OBJECT (overlay), "font-desc", play_bin->font_desc, NULL); } /* Take a ref */ play_bin->textoverlay_element = GST_ELEMENT_CAST (gst_object_ref (overlay)); /* we know this will succeed, as the video bin already created one before */ csp = gst_element_factory_make ("ffmpegcolorspace", "subtitlecsp"); /* Add our elements */ gst_bin_add_many (GST_BIN_CAST (element), csp, overlay, vbin, NULL); /* Link */ gst_element_link_pads (csp, "src", overlay, "video_sink"); gst_element_link_pads (overlay, "src", vbin, "sink"); /* Add ghost pads on the subtitle bin */ pad = gst_element_get_pad (overlay, "text_sink"); gst_element_add_pad (element, gst_ghost_pad_new ("text_sink", pad)); gst_object_unref (pad); pad = gst_element_get_pad (csp, "sink"); gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad)); gst_object_unref (pad); /* Set state to READY */ gst_element_set_state (element, GST_STATE_READY); return element; /* ERRORS */ no_overlay: { GST_WARNING_OBJECT (play_bin, "No overlay (pango) element, subtitles disabled"); return vbin; } } /* make the element (bin) that contains the elements needed to perform * audio playback. * * +-------------------------------------------------------------+ * | abin | * | +---------+ +----------+ +---------+ +---------+ | * | |audioconv| |audioscale| | volume | |audiosink| | * | +-sink src-sink src-sink src-sink | | * | | +---------+ +----------+ +---------+ +---------+ | * sink-+ | * +-------------------------------------------------------------+ */ static GstElement * gen_audio_element (GstPlayBin * play_bin) { gboolean res; GstElement *element; GstElement *conv; GstElement *scale; GstElement *sink; GstElement *volume; GstPad *pad; element = g_hash_table_lookup (play_bin->cache, "abin"); if (element != NULL) return element; if (play_bin->audio_sink) { sink = play_bin->audio_sink; } else { sink = gst_element_factory_make ("autoaudiosink", "audiosink"); if (sink == NULL) { sink = gst_element_factory_make ("alsasink", "audiosink"); } if (sink == NULL) goto no_sinks; play_bin->audio_sink = GST_ELEMENT_CAST (gst_object_ref (sink)); } gst_object_ref (sink); g_hash_table_insert (play_bin->cache, "audio_sink", sink); element = gst_bin_new ("abin"); gst_bin_add (GST_BIN_CAST (element), sink); conv = gst_element_factory_make ("audioconvert", "aconv"); if (conv == NULL) goto no_audioconvert; gst_bin_add (GST_BIN_CAST (element), conv); scale = gst_element_factory_make ("audioresample", "aresample"); if (scale == NULL) goto no_audioresample; gst_bin_add (GST_BIN_CAST (element), scale); volume = gst_element_factory_make ("volume", "volume"); g_object_set (G_OBJECT (volume), "volume", play_bin->volume, NULL); play_bin->volume_element = volume; gst_bin_add (GST_BIN_CAST (element), volume); res = gst_element_link_pads (conv, "src", scale, "sink"); res &= gst_element_link_pads (scale, "src", volume, "sink"); res &= gst_element_link_pads (volume, "src", sink, NULL); if (!res) goto link_failed; pad = gst_element_get_pad (conv, "sink"); gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad)); gst_object_unref (pad); gst_element_set_state (element, GST_STATE_READY); /* since we're gonna add it to a bin but don't want to lose it, * we keep a reference. */ gst_object_ref (element); g_hash_table_insert (play_bin->cache, "abin", element); return element; /* ERRORS */ no_sinks: { GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Both autoaudiosink and alsasink elements are missing.")), (NULL)); return NULL; } no_audioconvert: { GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "audioconvert"), ("possibly a liboil version mismatch?")); gst_object_unref (element); return NULL; } no_audioresample: { GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "audioresample"), ("possibly a liboil version mismatch?")); gst_object_unref (element); return NULL; } link_failed: { GST_ELEMENT_ERROR (play_bin, CORE, PAD, (NULL), ("Failed to configure the audio sink.")); gst_object_unref (element); return NULL; } } /* make the element (bin) that contains the elements needed to perform * visualisation ouput. The idea is to split the audio using tee, then * sending the output to the regular audio bin and the other output to * the vis plugin that transforms it into a video that is rendered with the * normal video bin. The video bin is run in a thread to make sure it does * not block the audio playback pipeline. * * +--------------------------------------------------------------------+ * | visbin | * | +------+ +--------+ +----------------+ | * | | tee | | aqueue | | abin ... | | * | +-sink src-sink src-sink | | * | | | | +--------+ +----------------+ | * | | | | | * | | | | +------+ +---------+ +------+ +-----------+ | * | | | | |vqueue| |audioconv| | vis | | vbin ... | | * | | | src-sink src-sink src-sink src-sink | | * | | | | +------+ +---------+ +------+ +-----------+ | * | | | | | * | | +------+ | * sink-+ | +---------------------------------------------------------------------+ */ static GstElement * gen_vis_element (GstPlayBin * play_bin) { gboolean res; GstElement *element; GstElement *tee; GstElement *asink; GstElement *vsink; GstElement *conv; GstElement *vis; GstElement *vqueue, *aqueue; GstPad *pad, *rpad; /* errors are already posted when these fail. */ asink = gen_audio_element (play_bin); if (!asink) return NULL; vsink = gen_video_element (play_bin); if (!vsink) { gst_object_unref (asink); return NULL; } element = gst_bin_new ("visbin"); tee = gst_element_factory_make ("tee", "tee"); vqueue = gst_element_factory_make ("queue", "vqueue"); aqueue = gst_element_factory_make ("queue", "aqueue"); gst_bin_add (GST_BIN_CAST (element), asink); gst_bin_add (GST_BIN_CAST (element), vqueue); gst_bin_add (GST_BIN_CAST (element), aqueue); gst_bin_add (GST_BIN_CAST (element), vsink); gst_bin_add (GST_BIN_CAST (element), tee); conv = gst_element_factory_make ("audioconvert", "aconv"); if (conv == NULL) goto no_audioconvert; gst_bin_add (GST_BIN_CAST (element), conv); if (play_bin->visualisation) { gst_object_ref (play_bin->visualisation); vis = play_bin->visualisation; } else { vis = gst_element_factory_make ("goom", "vis"); if (!vis) goto no_goom; } gst_bin_add (GST_BIN_CAST (element), vis); res = gst_element_link_pads (vqueue, "src", conv, "sink"); res &= gst_element_link_pads (conv, "src", vis, "sink"); res &= gst_element_link_pads (vis, "src", vsink, "sink"); if (!res) goto link_failed; pad = gst_element_get_pad (aqueue, "sink"); rpad = gst_element_get_request_pad (tee, "src%d"); gst_pad_link (rpad, pad); gst_object_unref (rpad); gst_object_unref (pad); gst_element_link_pads (aqueue, "src", asink, "sink"); pad = gst_element_get_pad (vqueue, "sink"); rpad = gst_element_get_request_pad (tee, "src%d"); gst_pad_link (rpad, pad); gst_object_unref (rpad); gst_object_unref (pad); pad = gst_element_get_pad (tee, "sink"); gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad)); gst_object_unref (pad); return element; /* ERRORS */ no_audioconvert: { GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "audioconvert"), ("possibly a liboil version mismatch?")); gst_object_unref (element); return NULL; } no_goom: { GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "goom"), (NULL)); gst_object_unref (element); return NULL; } link_failed: { GST_ELEMENT_ERROR (play_bin, CORE, PAD, (NULL), ("Failed to configure the visualisation element.")); gst_object_unref (element); return NULL; } } /* get rid of all installed sinks */ static void remove_sinks (GstPlayBin * play_bin) { GList *sinks; GstObject *parent; GstElement *element; GstPad *pad, *peer; if (play_bin->cache == NULL) return; GST_DEBUG ("removesinks"); element = g_hash_table_lookup (play_bin->cache, "abin"); if (element != NULL) { parent = gst_element_get_parent (element); if (parent != NULL) { /* we remove the element from the parent so that * there is no unwanted state change when the parent * is disposed */ play_bin->sinks = g_list_remove (play_bin->sinks, element); gst_element_set_state (element, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (parent), element); gst_object_unref (parent); } pad = gst_element_get_pad (element, "sink"); if (pad != NULL) { peer = gst_pad_get_peer (pad); if (peer != NULL) { gst_pad_unlink (peer, pad); gst_object_unref (peer); } gst_object_unref (pad); } } element = g_hash_table_lookup (play_bin->cache, "vbin"); if (element != NULL) { parent = gst_element_get_parent (element); if (parent != NULL) { play_bin->sinks = g_list_remove (play_bin->sinks, element); gst_element_set_state (element, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (parent), element); gst_object_unref (parent); } pad = gst_element_get_pad (element, "sink"); if (pad != NULL) { peer = gst_pad_get_peer (pad); if (peer != NULL) { gst_pad_unlink (peer, pad); gst_object_unref (peer); } gst_object_unref (pad); } } for (sinks = play_bin->sinks; sinks; sinks = g_list_next (sinks)) { GstElement *element = GST_ELEMENT_CAST (sinks->data); GstPad *pad; GstPad *peer; pad = gst_element_get_pad (element, "sink"); GST_LOG ("removing sink %p", element); peer = gst_pad_get_peer (pad); if (peer) { gst_pad_unlink (peer, pad); gst_object_unref (peer); } gst_object_unref (pad); gst_element_set_state (element, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (play_bin), element); } g_list_free (play_bin->sinks); play_bin->sinks = NULL; if (play_bin->visualisation) { GstElement *vis_bin; vis_bin = GST_ELEMENT_CAST (gst_element_get_parent (play_bin->visualisation)); gst_element_set_state (play_bin->visualisation, GST_STATE_NULL); if (vis_bin) { gst_bin_remove (GST_BIN_CAST (vis_bin), play_bin->visualisation); gst_object_unref (vis_bin); } } if (play_bin->frame) { gst_buffer_unref (play_bin->frame); play_bin->frame = NULL; } if (play_bin->textoverlay_element) { gst_object_unref (play_bin->textoverlay_element); play_bin->textoverlay_element = NULL; } } /* loop over the streams and set up the pipeline to play this * media file. First we count the number of audio and video streams. * If there is no video stream but there exists an audio stream, * we install a visualisation pipeline. * * Also make sure to only connect the first audio and video pad. FIXME * this should eventually be handled with a tuner interface so that * one can switch the streams. * * This function takes ownership of @sink.* */ static gboolean add_sink (GstPlayBin * play_bin, GstElement * sink, GstPad * srcpad, GstPad * subtitle_pad) { GstPad *sinkpad; GstPadLinkReturn linkres; GstElement *parent; GstStateChangeReturn stateret; GstState state; g_return_val_if_fail (sink != NULL, FALSE); /* For live pipelines we need to add the bin in the same state as the * parent so that it starts as soon as it is prerolled. */ if (play_bin->is_live) state = GST_STATE_PLAYING; else state = GST_STATE_PAUSED; /* this is only for debugging */ parent = gst_pad_get_parent_element (srcpad); if (parent) { GST_DEBUG ("Adding sink with state %d (parent: %d, peer: %d)", GST_STATE (sink), GST_STATE (play_bin), GST_STATE (parent)); gst_object_unref (parent); } gst_bin_add (GST_BIN_CAST (play_bin), sink); /* for live pipelines, disable the sync in the sinks until core handles this * correctly. */ if (play_bin->is_live) gst_element_set_clock (sink, NULL); /* bring it to the PAUSED state so we can link to the peer without * breaking the flow */ stateret = gst_element_set_state (sink, state); if (stateret == GST_STATE_CHANGE_FAILURE) goto state_failed; /* we found a sink for this stream, now try to install it */ sinkpad = gst_element_get_pad (sink, "sink"); linkres = gst_pad_link (srcpad, sinkpad); gst_object_unref (sinkpad); /* try to link the pad of the sink to the stream */ if (GST_PAD_LINK_FAILED (linkres)) goto link_failed; if (GST_IS_PAD (subtitle_pad)) { sinkpad = gst_element_get_pad (sink, "text_sink"); linkres = gst_pad_link (subtitle_pad, sinkpad); gst_object_unref (sinkpad); } /* try to link the subtitle pad of the sink to the stream, this is not * fatal. */ if (GST_PAD_LINK_FAILED (linkres)) goto subtitle_failed; done: /* we got the sink succesfully linked, now keep the sink * in our internal list */ play_bin->sinks = g_list_prepend (play_bin->sinks, sink); return TRUE; /* ERRORS */ state_failed: { gst_element_set_state (sink, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (play_bin), sink); GST_DEBUG_OBJECT (play_bin, "state change failure when adding sink"); return FALSE; } link_failed: { gchar *capsstr; GstCaps *caps; /* could not link this stream */ caps = gst_pad_get_caps (srcpad); capsstr = gst_caps_to_string (caps); g_warning ("could not link %s: %d", capsstr, linkres); GST_DEBUG_OBJECT (play_bin, "link failed when adding sink, caps %s, reason %d", capsstr, linkres); g_free (capsstr); gst_caps_unref (caps); gst_element_set_state (sink, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (play_bin), sink); return FALSE; } subtitle_failed: { gchar *capsstr; GstCaps *caps; /* could not link this stream */ caps = gst_pad_get_caps (subtitle_pad); capsstr = gst_caps_to_string (caps); GST_DEBUG_OBJECT (play_bin, "subtitle link failed when adding sink, caps %s, reason %d", capsstr, linkres); g_free (capsstr); gst_caps_unref (caps); /* not fatal */ goto done; } } static gboolean setup_sinks (GstPlayBaseBin * play_base_bin, GstPlayBaseGroup * group) { GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin); GList *streaminfo = NULL, *s; gboolean need_vis = FALSE; gboolean need_text = FALSE; GstPad *textsrcpad = NULL, *pad = NULL; GstElement *sink; gboolean res = TRUE; /* get rid of existing sinks */ if (play_bin->sinks) { remove_sinks (play_bin); } GST_DEBUG_OBJECT (play_base_bin, "setupsinks"); /* find out what to do */ if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0 && group->type[GST_STREAM_TYPE_TEXT - 1].npads > 0) { need_text = TRUE; } else if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads == 0 && group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0 && play_bin->visualisation != NULL) { need_vis = TRUE; } /* now actually connect everything */ g_object_get (G_OBJECT (play_base_bin), "stream-info", &streaminfo, NULL); for (s = streaminfo; s; s = g_list_next (s)) { GObject *obj = G_OBJECT (s->data); gint type; GstObject *object; g_object_get (obj, "type", &type, NULL); g_object_get (obj, "object", &object, NULL); } /* link audio */ if (group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0) { if (need_vis) { sink = gen_vis_element (play_bin); } else { sink = gen_audio_element (play_bin); } if (!sink) return FALSE; pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll, "src"); res = add_sink (play_bin, sink, pad, NULL); gst_object_unref (pad); } /* link video */ if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0) { if (need_text) { GstObject *parent = NULL, *grandparent = NULL; GstPad *ghost = NULL; sink = gen_text_element (play_bin); textsrcpad = gst_element_get_pad (group->type[GST_STREAM_TYPE_TEXT - 1].preroll, "src"); /* This pad is from subtitle-bin, we need to create a ghost pad to have common grandparents */ parent = gst_object_get_parent (GST_OBJECT_CAST (textsrcpad)); if (!parent) { GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no parent !"); gst_object_unref (textsrcpad); textsrcpad = NULL; goto beach; } grandparent = gst_object_get_parent (parent); if (!grandparent) { GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no grandparent !"); gst_object_unref (parent); gst_object_unref (textsrcpad); textsrcpad = NULL; goto beach; } /* We ghost the pad on subtitle_bin only, if the text pad is from the media demuxer we keep it as it is */ if (!GST_IS_PLAY_BIN (grandparent)) { GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from a subtitle " "file, ghosting to a suitable hierarchy"); ghost = gst_ghost_pad_new ("text_src", textsrcpad); if (!GST_IS_PAD (ghost)) { GST_WARNING_OBJECT (textsrcpad, "failed creating ghost pad for " "subtitle-bin"); gst_object_unref (parent); gst_object_unref (grandparent); gst_object_unref (textsrcpad); textsrcpad = NULL; goto beach; } gst_pad_set_active (ghost, TRUE); if (gst_element_add_pad (GST_ELEMENT_CAST (grandparent), ghost)) { gst_object_unref (textsrcpad); textsrcpad = gst_object_ref (ghost); } else { GST_WARNING_OBJECT (ghost, "failed adding ghost pad on subtitle-bin"); gst_pad_set_active (ghost, FALSE); gst_object_unref (ghost); gst_object_unref (textsrcpad); textsrcpad = NULL; } } else { GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from the demuxer " "no changes to hierarchy needed"); } gst_object_unref (parent); gst_object_unref (grandparent); } else { sink = gen_video_element (play_bin); } beach: if (!sink) return FALSE; pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll, "src"); res = add_sink (play_bin, sink, pad, textsrcpad); gst_object_unref (pad); if (textsrcpad) gst_object_unref (textsrcpad); } /* remove the sinks now, pipeline get_state will now wait for the * sinks to preroll */ if (play_bin->fakesink) { gst_element_set_state (play_bin->fakesink, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink); play_bin->fakesink = NULL; } return res; } /* Send an event to our sinks until one of them works; don't then send to the * remaining sinks (unlike GstBin) */ static gboolean gst_play_bin_send_event_to_sink (GstPlayBin * play_bin, GstEvent * event) { GList *sinks = play_bin->sinks; gboolean res = TRUE; while (sinks) { GstElement *sink = GST_ELEMENT_CAST (sinks->data); gst_event_ref (event); if ((res = gst_element_send_event (sink, event))) { GST_DEBUG_OBJECT (play_bin, "Sent event succesfully to sink %" GST_PTR_FORMAT, sink); break; } GST_DEBUG_OBJECT (play_bin, "Event failed when sent to sink %" GST_PTR_FORMAT, sink); sinks = g_list_next (sinks); } gst_event_unref (event); return res; } static gboolean do_playbin_seek (GstElement * element, GstEvent * event) { gdouble rate; GstSeekFlags flags; gboolean flush; gboolean was_playing = FALSE; gboolean res; gst_event_parse_seek (event, &rate, NULL, &flags, NULL, NULL, NULL, NULL); flush = flags & GST_SEEK_FLAG_FLUSH; if (flush) { GstState state; /* need to call _get_state() since a bin state is only updated * with this call. */ gst_element_get_state (element, &state, NULL, 0); was_playing = state == GST_STATE_PLAYING; if (was_playing) { gst_element_set_state (element, GST_STATE_PAUSED); gst_element_get_state (element, NULL, NULL, 50 * GST_MSECOND); } } GST_DEBUG_OBJECT (element, "Sending seek event to a sink"); res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event); if (flush) { /* need to reset the stream time to 0 after a flushing seek */ if (res) gst_pipeline_set_new_stream_time (GST_PIPELINE (element), 0); if (was_playing) /* and continue playing */ gst_element_set_state (element, GST_STATE_PLAYING); } return res; } /* We only want to send the event to a single sink (overriding GstBin's * behaviour), but we want to keep GstPipeline's behaviour - wrapping seek * events appropriately. So, this is a messy duplication of code. */ static gboolean gst_play_bin_send_event (GstElement * element, GstEvent * event) { gboolean res = FALSE; GstEventType event_type = GST_EVENT_TYPE (event); switch (event_type) { case GST_EVENT_SEEK: res = do_playbin_seek (element, event); break; default: res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event); break; } return res; } /* Override the set_clock function, we don't want to set a clock on the sinks * when we are live pipeline so that they don't synchronize until this is * fixed in core. */ static gboolean gst_play_bin_set_clock_func (GstElement * element, GstClock * clock) { GList *children; GstBin *bin; GstPlayBin *play_bin; gboolean res = TRUE; GstElement *asink, *vsink; bin = GST_BIN (element); play_bin = GST_PLAY_BIN (element); asink = g_hash_table_lookup (play_bin->cache, "audio_sink"); vsink = g_hash_table_lookup (play_bin->cache, "video_sink"); GST_DEBUG_OBJECT (play_bin, "setting clock, is_live %d", play_bin->is_live); GST_OBJECT_LOCK (bin); if (element->clock != clock) { for (children = bin->children; children; children = g_list_next (children)) { GstElement *child = GST_ELEMENT (children->data); if (play_bin->is_live && (child == asink || child == vsink)) res &= gst_element_set_clock (child, NULL); else res &= gst_element_set_clock (child, clock); } } GST_OBJECT_UNLOCK (bin); return res; } static void value_list_append_structure_list (GValue * list_val, GstStructure ** first, GList * structure_list) { GList *l; for (l = structure_list; l != NULL; l = l->next) { GValue val = { 0, }; if (*first == NULL) *first = gst_structure_copy ((GstStructure *) l->data); g_value_init (&val, GST_TYPE_STRUCTURE); g_value_take_boxed (&val, gst_structure_copy ((GstStructure *) l->data)); gst_value_list_append_value (list_val, &val); g_value_unset (&val); } } /* if it's a redirect message with multiple redirect locations we might * want to pick a different 'best' location depending on the required * bitrates and the connection speed */ static GstMessage * gst_play_bin_handle_redirect_message (GstPlayBin * playbin, GstMessage * msg) { const GValue *locations_list, *location_val; GstMessage *new_msg; GstStructure *new_structure = NULL; GList *l_good = NULL, *l_neutral = NULL, *l_bad = NULL; GValue new_list = { 0, }; guint size, i; GST_DEBUG_OBJECT (playbin, "redirect message: %" GST_PTR_FORMAT, msg); GST_DEBUG_OBJECT (playbin, "connection speed: %u", playbin->connection_speed); if (playbin->connection_speed == 0 || msg->structure == NULL) return msg; locations_list = gst_structure_get_value (msg->structure, "locations"); if (locations_list == NULL) return msg; size = gst_value_list_get_size (locations_list); if (size < 2) return msg; /* maintain existing order as much as possible, just sort references * with too high a bitrate to the end (the assumption being that if * bitrates are given they are given for all interesting streams and * that the you-need-at-least-version-xyz redirect has the same bitrate * as the lowest referenced redirect alternative) */ for (i = 0; i < size; ++i) { const GstStructure *s; gint bitrate = 0; location_val = gst_value_list_get_value (locations_list, i); s = (const GstStructure *) g_value_get_boxed (location_val); if (!gst_structure_get_int (s, "minimum-bitrate", &bitrate) || bitrate <= 0) { GST_DEBUG_OBJECT (playbin, "no bitrate: %" GST_PTR_FORMAT, s); l_neutral = g_list_append (l_neutral, (gpointer) s); } else if (bitrate > playbin->connection_speed) { GST_DEBUG_OBJECT (playbin, "bitrate too high: %" GST_PTR_FORMAT, s); l_bad = g_list_append (l_bad, (gpointer) s); } else if (bitrate <= playbin->connection_speed) { GST_DEBUG_OBJECT (playbin, "bitrate OK: %" GST_PTR_FORMAT, s); l_good = g_list_append (l_good, (gpointer) s); } } g_value_init (&new_list, GST_TYPE_LIST); value_list_append_structure_list (&new_list, &new_structure, l_good); value_list_append_structure_list (&new_list, &new_structure, l_neutral); value_list_append_structure_list (&new_list, &new_structure, l_bad); gst_structure_set_value (new_structure, "locations", &new_list); g_value_unset (&new_list); g_list_free (l_good); g_list_free (l_neutral); g_list_free (l_bad); new_msg = gst_message_new_element (msg->src, new_structure); gst_message_unref (msg); GST_DEBUG_OBJECT (playbin, "new redirect message: %" GST_PTR_FORMAT, new_msg); return new_msg; } static void gst_play_bin_handle_message (GstBin * bin, GstMessage * msg) { if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ELEMENT && msg->structure != NULL && gst_structure_has_name (msg->structure, "redirect")) { msg = gst_play_bin_handle_redirect_message (GST_PLAY_BIN (bin), msg); } GST_BIN_CLASS (parent_class)->handle_message (bin, msg); } static GstStateChangeReturn gst_play_bin_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstPlayBin *play_bin; play_bin = GST_PLAY_BIN (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: /* this really is the easiest way to make the state change return * ASYNC until we added the sinks */ if (!play_bin->fakesink) { play_bin->fakesink = gst_element_factory_make ("fakesink", "test"); gst_bin_add (GST_BIN_CAST (play_bin), play_bin->fakesink); } break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) return ret; switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: /* remember us being a live pipeline */ play_bin->is_live = (ret == GST_STATE_CHANGE_NO_PREROLL); GST_DEBUG_OBJECT (play_bin, "is live: %d", play_bin->is_live); break; case GST_STATE_CHANGE_PLAYING_TO_PAUSED: /* FIXME Release audio device when we implement that */ break; case GST_STATE_CHANGE_PAUSED_TO_READY: /* remove sinks we added */ remove_sinks (play_bin); /* and there might be a fakesink we need to clean up now */ if (play_bin->fakesink) { gst_element_set_state (play_bin->fakesink, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink); play_bin->fakesink = NULL; } break; default: break; } return ret; } static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_play_bin_debug, "playbin", 0, "play bin"); #ifdef ENABLE_NLS GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE, LOCALEDIR); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); #endif /* ENABLE_NLS */ return gst_element_register (plugin, "playbin", GST_RANK_NONE, GST_TYPE_PLAY_BIN); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "playbin", "player bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)