/* 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. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #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 4.0 typedef struct _GstPlayBin GstPlayBin; typedef struct _GstPlayBinClass GstPlayBinClass; struct _GstPlayBin { GstPlayBaseBin parent; /* the configurable elements */ GstElement *audio_sink; GstElement *video_sink; GstElement *visualisation; GstElement *volume_element; gfloat volume; /* these are the currently active sinks */ GList *sinks; /* these are the sink elements used for seeking/query etc.. */ GList *seekables; /* the last captured frame for snapshots */ GstBuffer *frame; /* our cache for the sinks */ GHashTable *cache; }; struct _GstPlayBinClass { GstPlayBaseBinClass parent_class; }; /* props */ enum { ARG_0, ARG_AUDIO_SINK, ARG_VIDEO_SINK, ARG_VIS_PLUGIN, ARG_VOLUME, ARG_FRAME }; /* 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 void setup_sinks (GstPlayBaseBin * play_base_bin); 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 GstElementStateReturn gst_play_bin_change_state (GstElement * element); static const GstEventMask *gst_play_bin_get_event_masks (GstElement * element); static gboolean gst_play_bin_send_event (GstElement * element, GstEvent * event); static const GstFormat *gst_play_bin_get_formats (GstElement * element); static gboolean gst_play_bin_convert (GstElement * element, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value); static const GstQueryType *gst_play_bin_get_query_types (GstElement * element); static gboolean gst_play_bin_query (GstElement * element, GstQueryType type, GstFormat * format, gint64 * value); static GstElementClass *parent_class; //static guint gst_play_bin_signals[LAST_SIGNAL] = { 0 }; static GstElementDetails gst_play_bin_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_ref (gst_play_base_bin_get_type ()); 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 (G_OBJECT_CLASS (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 (G_OBJECT_CLASS (gobject_klass), ARG_FRAME, g_param_spec_boxed ("frame", "Frame", "The last frame (NULL = no video available)", GST_TYPE_BUFFER, G_PARAM_READABLE)); 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->get_event_masks = GST_DEBUG_FUNCPTR (gst_play_bin_get_event_masks); gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_bin_send_event); gstelement_klass->get_formats = GST_DEBUG_FUNCPTR (gst_play_bin_get_formats); gstelement_klass->convert = GST_DEBUG_FUNCPTR (gst_play_bin_convert); gstelement_klass->get_query_types = GST_DEBUG_FUNCPTR (gst_play_bin_get_query_types); gstelement_klass->query = GST_DEBUG_FUNCPTR (gst_play_bin_query); 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->volume_element = NULL; play_bin->volume = 1.0; play_bin->seekables = NULL; play_bin->sinks = NULL; play_bin->frame = NULL; play_bin->cache = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, g_object_unref); /* no iterate is needed */ GST_FLAG_SET (play_bin, GST_BIN_SELF_SCHEDULABLE); } static void gst_play_bin_dispose (GObject * object) { GstPlayBin *play_bin; play_bin = GST_PLAY_BIN (object); remove_sinks (play_bin); g_hash_table_destroy (play_bin->cache); if (G_OBJECT_CLASS (parent_class)->dispose) { G_OBJECT_CLASS (parent_class)->dispose (object); } } static void gst_play_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstPlayBin *play_bin; g_return_if_fail (GST_IS_PLAY_BIN (object)); play_bin = GST_PLAY_BIN (object); switch (prop_id) { case ARG_VIDEO_SINK: play_bin->video_sink = g_value_get_object (value); /* 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: play_bin->audio_sink = g_value_get_object (value); g_hash_table_remove (play_bin->cache, "abin"); break; case ARG_VIS_PLUGIN: play_bin->visualisation = g_value_get_object (value); break; case ARG_VOLUME: if (play_bin->volume_element) { play_bin->volume = g_value_get_double (value); g_object_set (G_OBJECT (play_bin->volume_element), "volume", play_bin->volume, NULL); } 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; g_return_if_fail (GST_IS_PLAY_BIN (object)); 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: g_value_set_boxed (value, play_bin->frame); 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); if (play_bin->frame) { gst_buffer_unref (play_bin->frame); } play_bin->frame = gst_buffer_ref (frame); } /* 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; /* first see if we have it in the cache */ element = g_hash_table_lookup (play_bin->cache, "vbin"); if (element != NULL) { g_object_ref (G_OBJECT (element)); /* need to get the video sink element as we need to add it to the * list of seekable elements */ sink = g_hash_table_lookup (play_bin->cache, "video_sink"); goto done; } element = gst_bin_new ("vbin"); identity = gst_element_factory_make ("identity", "id"); g_signal_connect (identity, "handoff", G_CALLBACK (handoff), play_bin); conv = gst_element_factory_make ("ffmpegcolorspace", "vconv"); scale = gst_element_factory_make ("videoscale", "vscale"); if (play_bin->video_sink) { gst_object_ref (GST_OBJECT (play_bin->video_sink)); sink = play_bin->video_sink; } else { sink = gst_element_factory_make ("xvimagesink", "sink"); } g_hash_table_insert (play_bin->cache, "video_sink", sink); gst_bin_add (GST_BIN (element), identity); gst_bin_add (GST_BIN (element), conv); gst_bin_add (GST_BIN (element), scale); gst_bin_add (GST_BIN (element), sink); gst_element_link_pads (identity, "src", conv, "sink"); gst_element_link_pads (conv, "src", scale, "sink"); gst_element_link_pads (scale, "src", sink, "sink"); gst_element_add_ghost_pad (element, gst_element_get_pad (identity, "sink"), "sink"); gst_element_set_state (element, GST_STATE_READY); /* ref before adding to the cache */ g_object_ref (G_OBJECT (element)); g_hash_table_insert (play_bin->cache, "vbin", element); done: play_bin->seekables = g_list_append (play_bin->seekables, sink); return element; } /* 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) { GstElement *element; GstElement *conv; GstElement *sink; GstElement *volume; GstElement *scale; element = g_hash_table_lookup (play_bin->cache, "abin"); if (element != NULL) { g_object_ref (G_OBJECT (element)); sink = g_hash_table_lookup (play_bin->cache, "audio_sink"); goto done; } element = gst_bin_new ("abin"); conv = gst_element_factory_make ("audioconvert", "aconv"); scale = gst_element_factory_make ("audioscale", "ascale"); volume = gst_element_factory_make ("volume", "volume"); g_object_set (G_OBJECT (volume), "volume", play_bin->volume, NULL); play_bin->volume_element = volume; if (play_bin->audio_sink) { gst_object_ref (GST_OBJECT (play_bin->audio_sink)); sink = play_bin->audio_sink; } else { sink = gst_element_factory_make ("osssink", "sink"); } g_hash_table_insert (play_bin->cache, "audio_sink", sink); gst_bin_add (GST_BIN (element), conv); gst_bin_add (GST_BIN (element), scale); gst_bin_add (GST_BIN (element), volume); gst_bin_add (GST_BIN (element), sink); gst_element_link_pads (conv, "src", scale, "sink"); gst_element_link_pads (scale, "src", volume, "sink"); gst_element_link_pads (volume, "src", sink, "sink"); gst_element_add_ghost_pad (element, gst_element_get_pad (conv, "sink"), "sink"); gst_element_set_state (element, GST_STATE_READY); /* ref before adding to the cache */ g_object_ref (G_OBJECT (element)); g_hash_table_insert (play_bin->cache, "abin", element); done: play_bin->seekables = g_list_prepend (play_bin->seekables, sink); return element; } /* 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 | | abin ... | | * | +-sink src-sink | | * | | | | +----------------+ +-------------------+ | * | | | | | vthread | | * | | | | +---------+ +------+ +------+ | +--------------+ | | * | | | | |audioconv| | vis | |vqueue| | | vbin ... | | | * | | | src-sink src-sink src-sink src-sink | | | * | | | | +---------+ +------+ +------+ | +--------------+ | | * | | | | +-------------------+ | * | | +------+ | * sink-+ | * +--------------------------------------------------------------------------+ */ static GstElement * gen_vis_element (GstPlayBin * play_bin) { GstElement *element; GstElement *tee; GstElement *asink; GstElement *vsink; GstElement *conv; GstElement *vis; GstElement *vqueue; GstElement *vthread; element = gst_bin_new ("visbin"); tee = gst_element_factory_make ("tee", "tee"); vqueue = gst_element_factory_make ("queue", "vqueue"); vthread = gst_element_factory_make ("thread", "vthread"); asink = gen_audio_element (play_bin); vsink = gen_video_element (play_bin); gst_bin_add (GST_BIN (element), asink); gst_bin_add (GST_BIN (element), vqueue); gst_bin_add (GST_BIN (vthread), vsink); gst_bin_add (GST_BIN (element), vthread); gst_bin_add (GST_BIN (element), tee); conv = gst_element_factory_make ("audioconvert", "aconv"); if (play_bin->visualisation) { gst_object_ref (GST_OBJECT (play_bin->visualisation)); vis = play_bin->visualisation; } else { vis = gst_element_factory_make ("goom", "vis"); } gst_bin_add (GST_BIN (element), conv); gst_bin_add (GST_BIN (element), vis); gst_element_link_pads (conv, "src", vis, "sink"); gst_element_link_pads (vis, "src", vqueue, "sink"); gst_element_link_pads (vqueue, "src", vsink, "sink"); gst_pad_link (gst_element_get_request_pad (tee, "src%d"), gst_element_get_pad (asink, "sink")); gst_pad_link (gst_element_get_request_pad (tee, "src%d"), gst_element_get_pad (conv, "sink")); gst_element_add_ghost_pad (element, gst_element_get_pad (tee, "sink"), "sink"); return element; } /* get rid of all installed sinks */ static void remove_sinks (GstPlayBin * play_bin) { GList *sinks; GstObject *parent; GstElement *element; 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 */ gst_bin_remove (GST_BIN (parent), element); } } element = g_hash_table_lookup (play_bin->cache, "vbin"); if (element != NULL) { parent = gst_element_get_parent (element); if (parent != NULL) { gst_bin_remove (GST_BIN (parent), element); } } for (sinks = play_bin->sinks; sinks; sinks = g_list_next (sinks)) { GstElement *element = GST_ELEMENT (sinks->data); GST_LOG ("removing sink %p", element); gst_bin_remove (GST_BIN (play_bin), element); } g_list_free (play_bin->sinks); g_list_free (play_bin->seekables); play_bin->sinks = NULL; play_bin->seekables = NULL; if (play_bin->frame) { gst_buffer_unref (play_bin->frame); play_bin->frame = 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. */ static void setup_sinks (GstPlayBaseBin * play_base_bin) { GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin); GList *streaminfo; GList *s; gint num_audio = 0; gint num_video = 0; gboolean need_vis = FALSE; /* FIXME: do this nicer, like taking a look at the installed * bins and figuring out if we can simply reconnect them, remove * or add them. */ if (GST_STATE (play_base_bin) == GST_STATE_PLAYING) { remove_sinks (play_bin); } GST_DEBUG ("setupsinks"); /* get info about the stream */ g_object_get (G_OBJECT (play_bin), "stream-info", &streaminfo, NULL); /* first examine the streams we have */ for (s = streaminfo; s; s = g_list_next (s)) { GObject *obj = G_OBJECT (s->data); gint type; GstPad *srcpad; g_object_get (obj, "type", &type, NULL); /* we don't care about streams with their own sink */ if (type == 4) continue; /* else we need to get the pad */ g_object_get (obj, "object", &srcpad, NULL); /* hmm.. pad is allready linked */ if (gst_pad_is_linked (srcpad)) continue; if (type == 1) { num_audio++; } else if (type == 2) { num_video++; } } /* no video, use vis */ if (num_video == 0 && num_audio > 0 && play_bin->visualisation) { need_vis = TRUE; } num_audio = 0; num_video = 0; /* now actually connect everything */ for (s = streaminfo; s; s = g_list_next (s)) { GObject *obj = G_OBJECT (s->data); gint type; GstPad *srcpad, *sinkpad; GstElement *sink = NULL; gboolean res; gboolean mute = FALSE; GstObject *object; g_object_get (obj, "type", &type, NULL); g_object_get (obj, "object", &object, NULL); /* use the sink elements as seek entry point */ if (type == 4) { play_bin->seekables = g_list_prepend (play_bin->seekables, object); continue; } srcpad = GST_PAD (object); /* pas is allready linked, go to the next pad */ if (gst_pad_is_linked (srcpad)) continue; if (type == 1) { if (num_audio > 0) { g_warning ("two audio streams found, playing first one"); mute = TRUE; } else { if (need_vis) { sink = gen_vis_element (play_bin); } else { sink = gen_audio_element (play_bin); } num_audio++; } } else if (type == 2) { if (num_video > 0) { g_warning ("two video streams found, playing first one"); mute = TRUE; } else { sink = gen_video_element (play_bin); num_video++; } } else if (type == 4) { /* we can ignore these streams here */ } else { g_warning ("unknown stream found"); mute = TRUE; } /* we found a sink for this stream, now try to install it */ if (sink != NULL) { gst_object_ref (GST_OBJECT (sink)); gst_bin_add (GST_BIN (play_bin), sink); GST_DEBUG ("Adding sink with state %d (parent: %d, peer: %d)\n", GST_STATE (sink), GST_STATE (play_bin), GST_STATE (gst_pad_get_parent (srcpad))); sinkpad = gst_element_get_pad (sink, "sink"); /* try to link the pad of the sink to the stream */ res = gst_pad_link (srcpad, sinkpad); if (!res) { gchar *capsstr; /* could not link this stream */ capsstr = gst_caps_to_string (gst_pad_get_caps (srcpad)); g_warning ("could not link %s", capsstr); g_free (capsstr); GST_LOG ("removing sink %p", sink); gst_bin_remove (GST_BIN (play_bin), sink); mute = TRUE; } else { /* we got the sink succesfully linked, now keep the sink * in out internal list */ play_bin->sinks = g_list_prepend (play_bin->sinks, sink); } } if (mute) { /* no sink found/needed for this stream. We mute the stream * so that it does not take any resources */ g_object_set (G_OBJECT (obj), "mute", TRUE, NULL); } } } static GstElementStateReturn gst_play_bin_change_state (GstElement * element) { GstElementStateReturn ret; GstPlayBin *play_bin; int transition; play_bin = GST_PLAY_BIN (element); transition = GST_STATE_TRANSITION (element); ret = GST_ELEMENT_CLASS (parent_class)->change_state (element); if (ret == GST_STATE_FAILURE) return ret; switch (transition) { case GST_STATE_NULL_TO_READY: break; case GST_STATE_READY_TO_PAUSED: break; case GST_STATE_PAUSED_TO_PLAYING: break; case GST_STATE_PLAYING_TO_PAUSED: break; case GST_STATE_PAUSED_TO_READY: remove_sinks (play_bin); break; case GST_STATE_READY_TO_NULL: break; default: break; } return ret; } static const GstEventMask * gst_play_bin_get_event_masks (GstElement * element) { /* FIXME, get the list from the number of installed sinks */ return NULL; } /* send an event to all the sinks */ static gboolean gst_play_bin_send_event (GstElement * element, GstEvent * event) { gboolean res = FALSE; GList *s; GstPlayBin *play_bin; GstElementState state; gboolean need_pause = FALSE; play_bin = GST_PLAY_BIN (element); state = gst_element_get_state (element); /* we pause the pipeline first before sending the event. We only * do this if the pipeline was playing. */ if (state == GST_STATE_PLAYING) { need_pause = TRUE; gst_element_set_state (element, GST_STATE_PAUSED); } /* loop over all seekables and send the event to them */ for (s = play_bin->seekables; s; s = g_list_next (s)) { GstElement *element = GST_ELEMENT (s->data); gboolean ok; /* ref each event before sending it */ gst_event_ref (event); ok = gst_element_send_event (element, event); res |= ok; } gst_event_unref (event); /* and restart the pipeline if we paused it */ if (need_pause) gst_element_set_state (element, GST_STATE_PLAYING); return res; } static const GstFormat * gst_play_bin_get_formats (GstElement * element) { /* FIXME, compile this list from the installed sinks */ static GstFormat formats[] = { GST_FORMAT_TIME, 0, }; return formats; } static gboolean gst_play_bin_convert (GstElement * element, GstFormat src_format, gint64 src_value, GstFormat * dest_format, gint64 * dest_value) { gboolean res = FALSE; GList *s; GstPlayBin *play_bin; play_bin = GST_PLAY_BIN (element); /* do a conversion, loop over all sinks, stop as soon as one of the * sinks returns a successful result */ for (s = play_bin->seekables; s; s = g_list_next (s)) { GstElement *element = GST_ELEMENT (s->data); res = gst_element_convert (element, src_format, src_value, dest_format, dest_value); if (res) break; } return res; } static const GstQueryType * gst_play_bin_get_query_types (GstElement * element) { /* FIXME, compile from the installed sinks */ static const GstQueryType query_types[] = { GST_QUERY_TOTAL, GST_QUERY_POSITION, 0 }; return query_types; } static gboolean gst_play_bin_query (GstElement * element, GstQueryType type, GstFormat * format, gint64 * value) { gboolean res = FALSE; GList *s; GstPlayBin *play_bin; play_bin = GST_PLAY_BIN (element); for (s = play_bin->seekables; s; s = g_list_next (s)) { GstElement *element = GST_ELEMENT (s->data); res = gst_element_query (element, type, format, value); if (res) break; } return res; } static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_play_bin_debug, "playbin", 0, "play bin"); 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, GST_ORIGIN)