/* GStreamer * Copyright (C) <2007> Wim Taymans * * 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 #include #include "gstplaysink.h" GST_DEBUG_CATEGORY_STATIC (gst_play_sink_debug); #define GST_CAT_DEFAULT gst_play_sink_debug #define VOLUME_MAX_DOUBLE 10.0 #define GST_PLAY_CHAIN(c) (GstPlayChain *)(c) /* holds the common data fields for the audio and video pipelines. We keep them * in a structure to more easily have all the info available. */ typedef struct { GstPlaySink *playsink; GstElement *bin; gboolean added; gboolean activated; } GstPlayChain; typedef struct { GstPlayChain chain; GstPad *sinkpad; GstElement *queue; GstElement *conv; GstElement *resample; GstElement *volume; /* element with the volume property */ GstElement *mute; /* element with the mute property */ GstElement *sink; } GstPlayAudioChain; typedef struct { GstPlayChain chain; GstPad *sinkpad; GstElement *queue; GstElement *conv; GstElement *scale; GstElement *sink; gboolean async; } GstPlayVideoChain; typedef struct { GstPlayChain chain; GstPad *sinkpad; GstElement *queue; GstElement *conv; GstElement *resample; GstPad *blockpad; /* srcpad of resample, used for switching the vis */ GstPad *vissinkpad; /* visualisation sinkpad, */ GstElement *vis; GstPad *vissrcpad; /* visualisation srcpad, */ GstPad *srcpad; /* outgoing srcpad, used to connect to the next * chain */ } GstPlayVisChain; typedef struct { GstPlayChain chain; GstPad *sinkpad; GstElement *conv; GstElement *overlay; GstPad *videosinkpad; GstPad *textsinkpad; GstPad *srcpad; /* outgoing srcpad, used to connect to the next * chain */ } GstPlayTextChain; #define GST_PLAY_SINK_GET_LOCK(playsink) (((GstPlaySink *)playsink)->lock) #define GST_PLAY_SINK_LOCK(playsink) g_mutex_lock (GST_PLAY_SINK_GET_LOCK (playsink)) #define GST_PLAY_SINK_UNLOCK(playsink) g_mutex_unlock (GST_PLAY_SINK_GET_LOCK (playsink)) struct _GstPlaySink { GstBin bin; GMutex *lock; GstPlayFlags flags; GstPlayAudioChain *audiochain; GstPlayVideoChain *videochain; GstPlayVisChain *vischain; GstPlayTextChain *textchain; GstPad *audio_pad; gboolean audio_pad_raw; GstElement *audio_tee; GstPad *audio_tee_sink; GstPad *audio_tee_asrc; GstPad *audio_tee_vissrc; GstPad *video_pad; gboolean video_pad_raw; GstPad *text_pad; /* properties */ GstElement *audio_sink; GstElement *video_sink; GstElement *visualisation; gfloat volume; gboolean mute; gchar *font_desc; /* font description */ guint connection_speed; /* connection speed in bits/sec (0 = unknown) */ }; struct _GstPlaySinkClass { GstBinClass parent_class; }; /* props */ enum { PROP_0, PROP_AUDIO_SINK, PROP_VIDEO_SINK, PROP_VIS_PLUGIN, PROP_VOLUME, PROP_FRAME, PROP_FONT_DESC, PROP_LAST }; /* signals */ enum { LAST_SIGNAL }; static void gst_play_sink_class_init (GstPlaySinkClass * klass); static void gst_play_sink_init (GstPlaySink * playsink); static void gst_play_sink_dispose (GObject * object); static void gst_play_sink_finalize (GObject * object); static gboolean gst_play_sink_send_event (GstElement * element, GstEvent * event); static GstStateChangeReturn gst_play_sink_change_state (GstElement * element, GstStateChange transition); static GstElementClass *parent_class; /* static guint gst_play_sink_signals[LAST_SIGNAL] = { 0 }; */ static const GstElementDetails gst_play_sink_details = GST_ELEMENT_DETAILS ("Player Sink", "Generic/Bin/Player", "Autoplug and play media from an uri", "Wim Taymans "); GType gst_play_sink_get_type (void) { static GType gst_play_sink_type = 0; if (!gst_play_sink_type) { static const GTypeInfo gst_play_sink_info = { sizeof (GstPlaySinkClass), NULL, NULL, (GClassInitFunc) gst_play_sink_class_init, NULL, NULL, sizeof (GstPlaySink), 0, (GInstanceInitFunc) gst_play_sink_init, NULL }; gst_play_sink_type = g_type_register_static (GST_TYPE_BIN, "GstPlaySink", &gst_play_sink_info, 0); } return gst_play_sink_type; } static void gst_play_sink_class_init (GstPlaySinkClass * klass) { GObjectClass *gobject_klass; GstElementClass *gstelement_klass; GstBinClass *gstbin_klass; gobject_klass = (GObjectClass *) klass; gstelement_klass = (GstElementClass *) klass; gstbin_klass = (GstBinClass *) klass; parent_class = g_type_class_peek_parent (klass); gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_play_sink_dispose); gobject_klass->finalize = GST_DEBUG_FUNCPTR (gst_play_sink_finalize); gst_element_class_set_details (gstelement_klass, &gst_play_sink_details); gstelement_klass->change_state = GST_DEBUG_FUNCPTR (gst_play_sink_change_state); gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_sink_send_event); GST_DEBUG_CATEGORY_INIT (gst_play_sink_debug, "playsink", 0, "play bin"); } static void gst_play_sink_init (GstPlaySink * playsink) { /* init groups */ playsink->video_sink = NULL; playsink->audio_sink = NULL; playsink->visualisation = NULL; playsink->volume = 1.0; playsink->font_desc = NULL; playsink->flags = GST_PLAY_FLAG_SOFT_VOLUME; playsink->lock = g_mutex_new (); } static void gst_play_sink_dispose (GObject * object) { GstPlaySink *playsink; playsink = GST_PLAY_SINK (object); if (playsink->audio_sink != NULL) { gst_element_set_state (playsink->audio_sink, GST_STATE_NULL); gst_object_unref (playsink->audio_sink); playsink->audio_sink = NULL; } if (playsink->video_sink != NULL) { gst_element_set_state (playsink->video_sink, GST_STATE_NULL); gst_object_unref (playsink->video_sink); playsink->video_sink = NULL; } if (playsink->visualisation != NULL) { gst_element_set_state (playsink->visualisation, GST_STATE_NULL); gst_object_unref (playsink->visualisation); playsink->visualisation = NULL; } g_free (playsink->font_desc); playsink->font_desc = NULL; G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_play_sink_finalize (GObject * object) { GstPlaySink *playsink; playsink = GST_PLAY_SINK (object); g_mutex_free (playsink->lock); G_OBJECT_CLASS (parent_class)->finalize (object); } void gst_play_sink_set_video_sink (GstPlaySink * playsink, GstElement * sink) { GST_PLAY_SINK_LOCK (playsink); if (playsink->video_sink) gst_object_unref (playsink->video_sink); if (sink) { gst_object_ref (sink); gst_object_sink (sink); } playsink->video_sink = sink; GST_PLAY_SINK_UNLOCK (playsink); } GstElement * gst_play_sink_get_video_sink (GstPlaySink * playsink) { GstElement *result = NULL; GstPlayVideoChain *chain; GST_PLAY_SINK_LOCK (playsink); if ((chain = (GstPlayVideoChain *) playsink->videochain)) { /* we have an active chain, get the sink */ if (chain->sink) result = gst_object_ref (chain->sink); } /* nothing found, return last configured sink */ if (result == NULL && playsink->video_sink) result = gst_object_ref (playsink->video_sink); GST_PLAY_SINK_UNLOCK (playsink); return result; } void gst_play_sink_set_audio_sink (GstPlaySink * playsink, GstElement * sink) { GST_PLAY_SINK_LOCK (playsink); if (playsink->audio_sink) gst_object_unref (playsink->audio_sink); if (sink) { gst_object_ref (sink); gst_object_sink (sink); } playsink->audio_sink = sink; GST_PLAY_SINK_UNLOCK (playsink); } GstElement * gst_play_sink_get_audio_sink (GstPlaySink * playsink) { GstElement *result = NULL; GstPlayAudioChain *chain; GST_PLAY_SINK_LOCK (playsink); if ((chain = (GstPlayAudioChain *) playsink->audiochain)) { /* we have an active chain, get the sink */ if (chain->sink) result = gst_object_ref (chain->sink); } /* nothing found, return last configured sink */ if (result == NULL && playsink->audio_sink) result = gst_object_ref (playsink->audio_sink); GST_PLAY_SINK_UNLOCK (playsink); return result; } static void gst_play_sink_vis_unblocked (GstPad * tee_pad, gboolean blocked, gpointer user_data) { GstPlaySink *playsink; playsink = GST_PLAY_SINK (user_data); /* nothing to do here, we need a dummy callback here to make the async call * non-blocking. */ GST_DEBUG_OBJECT (playsink, "vis pad unblocked"); } static void gst_play_sink_vis_blocked (GstPad * tee_pad, gboolean blocked, gpointer user_data) { GstPlaySink *playsink; GstPlayVisChain *chain; playsink = GST_PLAY_SINK (user_data); GST_PLAY_SINK_LOCK (playsink); GST_DEBUG_OBJECT (playsink, "vis pad blocked"); /* now try to change the plugin in the running vis chain */ if (!(chain = (GstPlayVisChain *) playsink->vischain)) goto done; /* unlink the old plugin and unghost the pad */ gst_pad_unlink (chain->blockpad, chain->vissinkpad); gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (chain->srcpad), NULL); /* set the old plugin to NULL and remove */ gst_element_set_state (chain->vis, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (chain->chain.bin), chain->vis); /* add new plugin and set state to playing */ chain->vis = gst_object_ref (playsink->visualisation); gst_bin_add (GST_BIN_CAST (chain->chain.bin), chain->vis); gst_element_set_state (chain->vis, GST_STATE_PLAYING); /* get pads */ chain->vissinkpad = gst_element_get_static_pad (chain->vis, "sink"); chain->vissrcpad = gst_element_get_static_pad (chain->vis, "src"); /* link pads */ gst_pad_link (chain->blockpad, chain->vissinkpad); gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (chain->srcpad), chain->vissrcpad); done: /* Unblock the pad */ gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_sink_vis_unblocked, playsink); GST_PLAY_SINK_UNLOCK (playsink); } void gst_play_sink_set_vis_plugin (GstPlaySink * playsink, GstElement * vis) { GstPlayVisChain *chain; /* setting NULL means creating the default vis plugin */ if (vis == NULL) vis = gst_element_factory_make ("goom", "vis"); /* simply return if we don't have a vis plugin here */ if (vis == NULL) return; GST_PLAY_SINK_LOCK (playsink); /* first store the new vis */ if (playsink->visualisation) gst_object_unref (playsink->visualisation); playsink->visualisation = gst_object_ref (vis); /* now try to change the plugin in the running vis chain, if we have no chain, * we don't bother, any future vis chain will be created with the new vis * plugin. */ if (!(chain = (GstPlayVisChain *) playsink->vischain)) goto done; /* block the pad, the next time the callback is called we can change the * visualisation. It's possible that this never happens or that the pad was * already blocked. If the callback never happens, we don't have new data so * we don't need the new vis plugin. If the pad was already blocked, the * function returns FALSE but the previous pad block will do the right thing * anyway. */ GST_DEBUG_OBJECT (playsink, "blocking vis pad"); gst_pad_set_blocked_async (chain->blockpad, TRUE, gst_play_sink_vis_blocked, playsink); done: GST_PLAY_SINK_UNLOCK (playsink); return; } GstElement * gst_play_sink_get_vis_plugin (GstPlaySink * playsink) { GstElement *result = NULL; GstPlayVisChain *chain; GST_PLAY_SINK_LOCK (playsink); if ((chain = (GstPlayVisChain *) playsink->vischain)) { /* we have an active chain, get the sink */ if (chain->vis) result = gst_object_ref (chain->vis); } /* nothing found, return last configured sink */ if (result == NULL && playsink->visualisation) result = gst_object_ref (playsink->visualisation); GST_PLAY_SINK_UNLOCK (playsink); return result; } void gst_play_sink_set_volume (GstPlaySink * playsink, gdouble volume) { GstPlayAudioChain *chain; GST_PLAY_SINK_LOCK (playsink); playsink->volume = volume; chain = (GstPlayAudioChain *) playsink->audiochain; if (chain && chain->volume) { /* if there is a mute element or we are not muted, set the volume */ if (chain->mute || !playsink->mute) g_object_set (chain->volume, "volume", volume, NULL); } GST_PLAY_SINK_UNLOCK (playsink); } gdouble gst_play_sink_get_volume (GstPlaySink * playsink) { gdouble result; GstPlayAudioChain *chain; GST_PLAY_SINK_LOCK (playsink); chain = (GstPlayAudioChain *) playsink->audiochain; result = playsink->volume; if (chain && chain->volume) { if (chain->mute || !playsink->mute) { g_object_get (chain->volume, "volume", &result, NULL); playsink->volume = result; } } GST_PLAY_SINK_UNLOCK (playsink); return result; } void gst_play_sink_set_mute (GstPlaySink * playsink, gboolean mute) { GstPlayAudioChain *chain; GST_PLAY_SINK_LOCK (playsink); playsink->mute = mute; chain = (GstPlayAudioChain *) playsink->audiochain; if (chain) { if (chain->mute) { g_object_set (chain->mute, "mute", mute, NULL); } else if (chain->volume) { if (mute) g_object_set (chain->volume, "volume", (gdouble) 0.0, NULL); else g_object_set (chain->volume, "volume", (gdouble) playsink->volume, NULL); } } GST_PLAY_SINK_UNLOCK (playsink); } gboolean gst_play_sink_get_mute (GstPlaySink * playsink) { gboolean result; GstPlayAudioChain *chain; GST_PLAY_SINK_LOCK (playsink); chain = (GstPlayAudioChain *) playsink->audiochain; if (chain && chain->mute) { g_object_get (chain->mute, "mute", &result, NULL); playsink->mute = result; } else { result = playsink->mute; } GST_PLAY_SINK_UNLOCK (playsink); return result; } static void post_missing_element_message (GstPlaySink * playsink, const gchar * name) { GstMessage *msg; msg = gst_missing_element_message_new (GST_ELEMENT_CAST (playsink), name); gst_element_post_message (GST_ELEMENT_CAST (playsink), msg); } static void free_chain (GstPlayChain * chain) { if (chain->bin) gst_object_unref (chain->bin); gst_object_unref (chain->playsink); g_free (chain); } static gboolean add_chain (GstPlayChain * chain, gboolean add) { if (chain->added == add) return TRUE; if (add) gst_bin_add (GST_BIN_CAST (chain->playsink), chain->bin); else gst_bin_remove (GST_BIN_CAST (chain->playsink), chain->bin); chain->added = add; return TRUE; } static gboolean activate_chain (GstPlayChain * chain, gboolean activate) { if (chain->activated == activate) return TRUE; if (activate) gst_element_set_state (chain->bin, GST_STATE_PAUSED); else gst_element_set_state (chain->bin, GST_STATE_NULL); chain->activated = activate; return TRUE; } static gint find_property (GstElement * element, const gchar * name) { gint res; if (g_object_class_find_property (G_OBJECT_GET_CLASS (element), name)) { res = 0; GST_DEBUG_OBJECT (element, "found %s property", name); } else { GST_DEBUG_OBJECT (element, "did not find %s property", name); res = 1; gst_object_unref (element); } return res; } /* find an object in the hierarchy with a property named @name */ static GstElement * gst_play_sink_find_property (GstPlaySink * playsink, GstElement * obj, const gchar * name) { GstElement *result = NULL; GstIterator *it; if (GST_IS_BIN (obj)) { it = gst_bin_iterate_recurse (GST_BIN_CAST (obj)); result = gst_iterator_find_custom (it, (GCompareFunc) find_property, (gpointer) name); gst_iterator_free (it); } else { if (g_object_class_find_property (G_OBJECT_GET_CLASS (obj), name)) { result = obj; gst_object_ref (obj); } } return result; } /* make the element (bin) that contains the elements needed to perform * video display. * * +------------------------------------------------------------+ * | vbin | * | +-------+ +----------+ +----------+ +---------+ | * | | queue | |colorspace| |videoscale| |videosink| | * | +-sink src-sink src-sink src-sink | | * | | +-------+ +----------+ +----------+ +---------+ | * sink-+ | * +------------------------------------------------------------+ * */ static GstPlayVideoChain * gen_video_chain (GstPlaySink * playsink, gboolean raw, gboolean async) { GstPlayVideoChain *chain; GstBin *bin; GstPad *pad; chain = g_new0 (GstPlayVideoChain, 1); chain->chain.playsink = gst_object_ref (playsink); GST_DEBUG_OBJECT (playsink, "making video chain %p", chain); if (playsink->video_sink) { chain->sink = gst_object_ref (playsink->video_sink); } else { chain->sink = gst_element_factory_make ("autovideosink", "videosink"); if (chain->sink == NULL) { chain->sink = gst_element_factory_make ("xvimagesink", "videosink"); } if (chain->sink == NULL) goto no_sinks; } /* if we can disable async behaviour of the sink, we can avoid adding a * queue for the audio chain. We can't use the deep property here because the * sink might change it's internal sink element later. */ if (g_object_class_find_property (G_OBJECT_GET_CLASS (chain->sink), "async")) { GST_DEBUG_OBJECT (playsink, "setting async property to %d on video sink", async); g_object_set (chain->sink, "async", async, NULL); chain->async = async; } else chain->async = TRUE; /* 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 */ chain->chain.bin = gst_bin_new ("vbin"); bin = GST_BIN_CAST (chain->chain.bin); gst_object_ref (bin); gst_object_sink (bin); gst_bin_add (bin, chain->sink); if (raw) { chain->conv = gst_element_factory_make ("ffmpegcolorspace", "vconv"); if (chain->conv == NULL) goto no_colorspace; gst_bin_add (bin, chain->conv); chain->scale = gst_element_factory_make ("videoscale", "vscale"); if (chain->scale == NULL) goto no_videoscale; gst_bin_add (bin, chain->scale); } /* decouple decoder from sink, this improves playback quite a lot since the * decoder can continue while the sink blocks for synchronisation. We don't * need a lot of buffers as this consumes a lot of memory and we don't want * too little because else we would be context switching too quickly. */ chain->queue = gst_element_factory_make ("queue", "vqueue"); g_object_set (G_OBJECT (chain->queue), "max-size-buffers", 3, "max-size-bytes", 0, "max-size-time", (gint64) 0, NULL); gst_bin_add (bin, chain->queue); if (raw) { gst_element_link_pads (chain->queue, "src", chain->conv, "sink"); gst_element_link_pads (chain->conv, "src", chain->scale, "sink"); /* be more careful with the pad from the custom sink element, it might not * be named 'sink' */ if (!gst_element_link_pads (chain->scale, "src", chain->sink, NULL)) goto link_failed; pad = gst_element_get_static_pad (chain->queue, "sink"); } else { if (!gst_element_link_pads (chain->queue, "src", chain->sink, NULL)) goto link_failed; pad = gst_element_get_static_pad (chain->queue, "sink"); } chain->sinkpad = gst_ghost_pad_new ("sink", pad); gst_object_unref (pad); gst_element_add_pad (chain->chain.bin, chain->sinkpad); return chain; /* ERRORS */ no_sinks: { post_missing_element_message (playsink, "autovideosink"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Both autovideosink and xvimagesink elements are missing.")), (NULL)); free_chain ((GstPlayChain *) chain); return NULL; } no_colorspace: { post_missing_element_message (playsink, "ffmpegcolorspace"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "ffmpegcolorspace"), (NULL)); free_chain ((GstPlayChain *) chain); return NULL; } no_videoscale: { post_missing_element_message (playsink, "videoscale"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "videoscale"), ("possibly a liboil version mismatch?")); free_chain ((GstPlayChain *) chain); return NULL; } link_failed: { GST_ELEMENT_ERROR (playsink, CORE, PAD, (NULL), ("Failed to configure the video sink.")); free_chain ((GstPlayChain *) chain); return NULL; } } /* make an element for playback of video with subtitles embedded. * * +----------------------------------------------+ * | tbin +-------------+ | * | +-----+ | textoverlay | | * | | csp | +--video_sink | | * video_sink-sink src+ +-text_sink src--+ | * | +-----+ | +-------------+ +-- src * text_sink-------------+ | * +----------------------------------------------+ */ static GstPlayTextChain * gen_text_chain (GstPlaySink * playsink) { GstPlayTextChain *chain; GstBin *bin; GstPad *pad; chain = g_new0 (GstPlayTextChain, 1); chain->chain.playsink = gst_object_ref (playsink); GST_DEBUG_OBJECT (playsink, "making text chain %p", chain); chain->chain.bin = gst_bin_new ("tbin"); bin = GST_BIN_CAST (chain->chain.bin); gst_object_ref (bin); gst_object_sink (bin); chain->conv = gst_element_factory_make ("ffmpegcolorspace", "tconv"); if (chain->conv == NULL) goto no_colorspace; gst_bin_add (bin, chain->conv); chain->overlay = gst_element_factory_make ("textoverlay", "overlay"); if (chain->overlay == NULL) goto no_overlay; gst_bin_add (bin, chain->overlay); /* Set some parameters */ g_object_set (G_OBJECT (chain->overlay), "halign", "center", "valign", "bottom", NULL); if (playsink->font_desc) { g_object_set (G_OBJECT (chain->overlay), "font-desc", playsink->font_desc, NULL); } g_object_set (G_OBJECT (chain->overlay), "wait-text", FALSE, NULL); /* Link */ gst_element_link_pads (chain->conv, "src", chain->overlay, "video_sink"); /* Add ghost pads on the subtitle bin */ pad = gst_element_get_static_pad (chain->overlay, "text_sink"); chain->textsinkpad = gst_ghost_pad_new ("text_sink", pad); gst_object_unref (pad); gst_element_add_pad (chain->chain.bin, chain->textsinkpad); pad = gst_element_get_static_pad (chain->conv, "sink"); chain->videosinkpad = gst_ghost_pad_new ("sink", pad); gst_object_unref (pad); gst_element_add_pad (chain->chain.bin, chain->videosinkpad); pad = gst_element_get_static_pad (chain->overlay, "src"); chain->srcpad = gst_ghost_pad_new ("src", pad); gst_object_unref (pad); gst_element_add_pad (chain->chain.bin, chain->srcpad); return chain; /* ERRORS */ no_colorspace: { post_missing_element_message (playsink, "ffmpegcolorspace"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "ffmpegcolorspace"), (NULL)); free_chain ((GstPlayChain *) chain); return NULL; } no_overlay: { post_missing_element_message (playsink, "textoverlay"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "textoverlay"), (NULL)); free_chain ((GstPlayChain *) chain); return NULL; } } /* make the chain that contains the elements needed to perform * audio playback. * * We add a tee as the first element so that we can link the visualisation chain * to it when requested. * * +-------------------------------------------------------------+ * | abin | * | +---------+ +----------+ +---------+ +---------+ | * | |audioconv| |audioscale| | volume | |audiosink| | * | +-srck src-sink src-sink src-sink | | * | | +---------+ +----------+ +---------+ +---------+ | * sink-+ | * +-------------------------------------------------------------+ */ static GstPlayAudioChain * gen_audio_chain (GstPlaySink * playsink, gboolean raw, gboolean queue) { GstPlayAudioChain *chain; GstBin *bin; gboolean res, have_volume; GstPad *pad; chain = g_new0 (GstPlayAudioChain, 1); chain->chain.playsink = gst_object_ref (playsink); GST_DEBUG_OBJECT (playsink, "making audio chain %p", chain); if (playsink->audio_sink) { chain->sink = gst_object_ref (playsink->audio_sink); } else { chain->sink = gst_element_factory_make ("autoaudiosink", "audiosink"); if (chain->sink == NULL) { chain->sink = gst_element_factory_make ("alsasink", "audiosink"); } if (chain->sink == NULL) goto no_sinks; } chain->chain.bin = gst_bin_new ("abin"); bin = GST_BIN_CAST (chain->chain.bin); gst_object_ref (bin); gst_object_sink (bin); gst_bin_add (bin, chain->sink); if (queue) { /* we have to add a queue when we need to decouple for the video sink in * visualisations */ GST_DEBUG_OBJECT (playsink, "adding audio queue"); chain->queue = gst_element_factory_make ("queue", "aqueue"); gst_bin_add (bin, chain->queue); } /* check if the sink has the volume property, if it does we don't need to * add a volume element. */ if (g_object_class_find_property (G_OBJECT_GET_CLASS (chain->sink), "volume")) { GST_DEBUG_OBJECT (playsink, "the sink has a volume property"); have_volume = TRUE; /* take ref to sink to control the volume */ chain->volume = gst_object_ref (chain->sink); g_object_set (G_OBJECT (chain->volume), "volume", playsink->volume, NULL); /* if the sink also has a mute property we can use this as well. We'll only * use the mute property if there is a volume property. We can simulate the * mute with the volume otherwise. */ if (g_object_class_find_property (G_OBJECT_GET_CLASS (chain->sink), "mute")) { GST_DEBUG_OBJECT (playsink, "the sink has a mute property"); chain->mute = gst_object_ref (chain->sink); } } else { /* no volume, we need to add a volume element when we can */ GST_DEBUG_OBJECT (playsink, "the sink has no volume property"); have_volume = FALSE; } if (raw) { chain->conv = gst_element_factory_make ("audioconvert", "aconv"); if (chain->conv == NULL) goto no_audioconvert; gst_bin_add (bin, chain->conv); chain->resample = gst_element_factory_make ("audioresample", "aresample"); if (chain->resample == NULL) goto no_audioresample; gst_bin_add (bin, chain->resample); res = gst_element_link_pads (chain->conv, "src", chain->resample, "sink"); if (!have_volume && playsink->flags & GST_PLAY_FLAG_SOFT_VOLUME) { chain->volume = gst_element_factory_make ("volume", "volume"); if (chain->volume == NULL) goto no_volume; have_volume = TRUE; /* volume also has the mute property */ chain->mute = gst_object_ref (chain->volume); /* configure with the latest volume and mute */ g_object_set (G_OBJECT (chain->volume), "volume", playsink->volume, NULL); g_object_set (G_OBJECT (chain->mute), "mute", playsink->mute, NULL); gst_bin_add (bin, chain->volume); res &= gst_element_link_pads (chain->resample, "src", chain->volume, "sink"); res &= gst_element_link_pads (chain->volume, "src", chain->sink, NULL); } else { res &= gst_element_link_pads (chain->resample, "src", chain->sink, NULL); } if (!res) goto link_failed; if (queue) { res = gst_element_link_pads (chain->queue, "src", chain->conv, "sink"); pad = gst_element_get_static_pad (chain->queue, "sink"); } else { pad = gst_element_get_static_pad (chain->conv, "sink"); } } else { if (queue) { res = gst_element_link_pads (chain->queue, "src", chain->sink, "sink"); pad = gst_element_get_static_pad (chain->queue, "sink"); } else { pad = gst_element_get_static_pad (chain->sink, "sink"); } } /* post a warning if we have no way to configure the volume */ if (!have_volume) { GST_ELEMENT_WARNING (playsink, STREAM, NOT_IMPLEMENTED, (_("No volume control found")), ("No volume control found")); } chain->sinkpad = gst_ghost_pad_new ("sink", pad); gst_object_unref (pad); gst_element_add_pad (chain->chain.bin, chain->sinkpad); return chain; /* ERRORS */ no_sinks: { post_missing_element_message (playsink, "autoaudiosink"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Both autoaudiosink and alsasink elements are missing.")), (NULL)); free_chain ((GstPlayChain *) chain); return NULL; } no_audioconvert: { post_missing_element_message (playsink, "audioconvert"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "audioconvert"), ("possibly a liboil version mismatch?")); free_chain ((GstPlayChain *) chain); return NULL; } no_audioresample: { post_missing_element_message (playsink, "audioresample"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "audioresample"), ("possibly a liboil version mismatch?")); free_chain ((GstPlayChain *) chain); return NULL; } no_volume: { post_missing_element_message (playsink, "volume"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "volume"), ("possibly a liboil version mismatch?")); free_chain ((GstPlayChain *) chain); return NULL; } link_failed: { GST_ELEMENT_ERROR (playsink, CORE, PAD, (NULL), ("Failed to configure the audio sink.")); free_chain ((GstPlayChain *) chain); return NULL; } } /* * +-------------------------------------------------------------------+ * | visbin | * | +----------+ +------------+ +----------+ +-------+ | * | | visqueue | | audioconv | | audiores | | vis | | * | +-sink src-sink + samp src-sink src-sink src-+ | * | | +----------+ +------------+ +----------+ +-------+ | | * sink-+ +-src * +-------------------------------------------------------------------+ * */ static GstPlayVisChain * gen_vis_chain (GstPlaySink * playsink) { GstPlayVisChain *chain; GstBin *bin; gboolean res; GstPad *pad; chain = g_new0 (GstPlayVisChain, 1); chain->chain.playsink = gst_object_ref (playsink); GST_DEBUG_OBJECT (playsink, "making vis chain %p", chain); chain->chain.bin = gst_bin_new ("visbin"); bin = GST_BIN_CAST (chain->chain.bin); gst_object_ref (bin); gst_object_sink (bin); /* we're queuing raw audio here, we can remove this queue when we can disable * async behaviour in the video sink. */ chain->queue = gst_element_factory_make ("queue", "visqueue"); gst_bin_add (bin, chain->queue); chain->conv = gst_element_factory_make ("audioconvert", "aconv"); if (chain->conv == NULL) goto no_audioconvert; gst_bin_add (bin, chain->conv); chain->resample = gst_element_factory_make ("audioresample", "aresample"); if (chain->resample == NULL) goto no_audioresample; gst_bin_add (bin, chain->resample); /* this pad will be used for blocking the dataflow and switching the vis * plugin */ chain->blockpad = gst_element_get_static_pad (chain->resample, "src"); if (playsink->visualisation) { chain->vis = gst_object_ref (playsink->visualisation); } else { chain->vis = gst_element_factory_make ("goom", "vis"); if (!chain->vis) goto no_goom; } gst_bin_add (bin, chain->vis); res = gst_element_link_pads (chain->queue, "src", chain->conv, "sink"); res &= gst_element_link_pads (chain->conv, "src", chain->resample, "sink"); res &= gst_element_link_pads (chain->resample, "src", chain->vis, "sink"); if (!res) goto link_failed; chain->vissinkpad = gst_element_get_static_pad (chain->vis, "sink"); chain->vissrcpad = gst_element_get_static_pad (chain->vis, "src"); pad = gst_element_get_static_pad (chain->queue, "sink"); chain->sinkpad = gst_ghost_pad_new ("sink", pad); gst_object_unref (pad); gst_element_add_pad (chain->chain.bin, chain->sinkpad); chain->srcpad = gst_ghost_pad_new ("src", chain->vissrcpad); gst_element_add_pad (chain->chain.bin, chain->srcpad); return chain; /* ERRORS */ no_audioconvert: { post_missing_element_message (playsink, "audioconvert"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "audioconvert"), ("possibly a liboil version mismatch?")); free_chain ((GstPlayChain *) chain); return NULL; } no_audioresample: { post_missing_element_message (playsink, "audioresample"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "audioresample"), (NULL)); free_chain ((GstPlayChain *) chain); return NULL; } no_goom: { post_missing_element_message (playsink, "goom"); GST_ELEMENT_ERROR (playsink, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), "goom"), (NULL)); free_chain ((GstPlayChain *) chain); return NULL; } link_failed: { GST_ELEMENT_ERROR (playsink, CORE, PAD, (NULL), ("Failed to configure the visualisation element.")); free_chain ((GstPlayChain *) chain); return NULL; } } /* this function is called when all the request pads are requested and when we * have to construct the final pipeline. Based on the flags we construct the * final output pipelines. */ gboolean gst_play_sink_reconfigure (GstPlaySink * playsink) { GstPlayFlags flags; gboolean need_audio, need_video, need_vis, need_text; GST_DEBUG_OBJECT (playsink, "reconfiguring"); /* assume we need nothing */ need_audio = need_video = need_vis = need_text = FALSE; GST_PLAY_SINK_LOCK (playsink); GST_OBJECT_LOCK (playsink); /* get flags, there are protected with the object lock */ flags = playsink->flags; GST_OBJECT_UNLOCK (playsink); /* figure out which components we need */ if (flags & GST_PLAY_FLAG_TEXT && playsink->text_pad) { /* we need video too */ if (!playsink->video_pad) goto subs_but_no_video; /* we have subtitles and we are requested to show it, we also need to show * video in this case. */ need_video = TRUE; need_text = TRUE; } else if (flags & GST_PLAY_FLAG_VIDEO && playsink->video_pad) { /* we have video and we are requested to show it */ need_video = TRUE; } if (playsink->audio_pad) { if (flags & GST_PLAY_FLAG_AUDIO) { need_audio = TRUE; } if (playsink->audio_pad_raw) { /* only can do vis with raw uncompressed audio */ if (flags & GST_PLAY_FLAG_VIS && !need_video) { /* also add video when we add visualisation */ need_video = TRUE; need_vis = TRUE; } } } /* set up video pipeline */ if (need_video) { GST_DEBUG_OBJECT (playsink, "adding video, raw %d", playsink->video_pad_raw); if (!playsink->videochain) { gboolean raw, async; /* we need a raw sink when we do vis or when we have a raw pad */ raw = need_vis ? TRUE : playsink->video_pad_raw; /* we try to set the sink async=FALSE when we need vis, this way we can * avoid a queue in the audio chain. */ async = !need_vis; playsink->videochain = gen_video_chain (playsink, raw, async); } add_chain (GST_PLAY_CHAIN (playsink->videochain), TRUE); activate_chain (GST_PLAY_CHAIN (playsink->videochain), TRUE); /* if we are not part of vis or subtitles, set the ghostpad target */ if (!need_vis && !need_text) { GST_DEBUG_OBJECT (playsink, "ghosting video sinkpad"); gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad), playsink->videochain->sinkpad); } } else { if (playsink->videochain) { add_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE); activate_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE); } if (playsink->video_pad) gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad), NULL); } if (need_text) { GST_DEBUG_OBJECT (playsink, "adding text"); if (!playsink->textchain) { playsink->textchain = gen_text_chain (playsink); } if (playsink->textchain) { add_chain (GST_PLAY_CHAIN (playsink->textchain), TRUE); gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->text_pad), playsink->textchain->textsinkpad); gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad), playsink->textchain->videosinkpad); gst_pad_link (playsink->textchain->srcpad, playsink->videochain->sinkpad); activate_chain (GST_PLAY_CHAIN (playsink->textchain), TRUE); } } else { /* we have no subtitles/text or we are requested to not show them */ if (playsink->textchain) { add_chain (GST_PLAY_CHAIN (playsink->textchain), FALSE); activate_chain (GST_PLAY_CHAIN (playsink->textchain), FALSE); } if (!need_video && playsink->video_pad) gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->video_pad), NULL); if (playsink->text_pad) gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (playsink->text_pad), NULL); } if (need_audio) { GST_DEBUG_OBJECT (playsink, "adding audio"); if (!playsink->audiochain) { gboolean raw, queue; /* get a raw sink if we are asked for a raw pad */ raw = playsink->audio_pad_raw; if (need_vis) { /* If we are dealing with visualisations, we need to add a queue to * decouple the audio from the video part. We only have to do this when * the video part is async=true */ queue = ((GstPlayVideoChain *) playsink->videochain)->async; GST_DEBUG_OBJECT (playsink, "need audio queue for vis: %d", queue); } else { /* no vis, we can avoid a queue */ GST_DEBUG_OBJECT (playsink, "don't need audio queue"); queue = FALSE; } playsink->audiochain = gen_audio_chain (playsink, raw, queue); } add_chain (GST_PLAY_CHAIN (playsink->audiochain), TRUE); gst_pad_link (playsink->audio_tee_asrc, playsink->audiochain->sinkpad); activate_chain (GST_PLAY_CHAIN (playsink->audiochain), TRUE); } else { /* we have no audio or we are requested to not play audio */ if (playsink->audiochain) { gst_pad_unlink (playsink->audio_tee_asrc, playsink->audiochain->sinkpad); add_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE); activate_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE); } } if (need_vis) { GstPad *srcpad; if (!playsink->vischain) playsink->vischain = gen_vis_chain (playsink); GST_DEBUG_OBJECT (playsink, "adding visualisation"); srcpad = gst_element_get_static_pad (GST_ELEMENT_CAST (playsink->vischain->chain. bin), "src"); add_chain (GST_PLAY_CHAIN (playsink->vischain), TRUE); gst_pad_link (playsink->audio_tee_vissrc, playsink->vischain->sinkpad); gst_pad_link (srcpad, playsink->videochain->sinkpad); gst_object_unref (srcpad); activate_chain (GST_PLAY_CHAIN (playsink->vischain), TRUE); } else { if (playsink->vischain) { add_chain (GST_PLAY_CHAIN (playsink->vischain), FALSE); activate_chain (GST_PLAY_CHAIN (playsink->vischain), FALSE); } } GST_PLAY_SINK_UNLOCK (playsink); return TRUE; /* ERRORS */ subs_but_no_video: { GST_ELEMENT_ERROR (playsink, STREAM, FORMAT, (_("Can't play a text file without video.")), ("Have text pad but no video pad")); GST_PLAY_SINK_UNLOCK (playsink); return FALSE; } } /** * gst_play_sink_set_flags: * @playsink: a #GstPlaySink * @flags: #GstPlayFlags * * Configure @flags on @playsink. The flags control the behaviour of @playsink * when constructing the sink pipelins. * * Returns: TRUE if the flags could be configured. */ gboolean gst_play_sink_set_flags (GstPlaySink * playsink, GstPlayFlags flags) { g_return_val_if_fail (GST_IS_PLAY_SINK (playsink), FALSE); GST_OBJECT_LOCK (playsink); playsink->flags = flags; GST_OBJECT_UNLOCK (playsink); return TRUE; } /** * gst_play_sink_get_flags: * @playsink: a #GstPlaySink * * Get the flags of @playsink. That flags control the behaviour of the sink when * it constructs the sink pipelines. * * Returns: the currently configured #GstPlayFlags. */ GstPlayFlags gst_play_sink_get_flags (GstPlaySink * playsink) { GstPlayFlags res; g_return_val_if_fail (GST_IS_PLAY_SINK (playsink), 0); GST_OBJECT_LOCK (playsink); res = playsink->flags; GST_OBJECT_UNLOCK (playsink); return res; } void gst_play_sink_set_font_desc (GstPlaySink * playsink, const gchar * desc) { GstPlayTextChain *chain; GST_PLAY_SINK_LOCK (playsink); chain = (GstPlayTextChain *) playsink->textchain; g_free (playsink->font_desc); playsink->font_desc = g_strdup (desc); if (chain && chain->overlay) { g_object_set (chain->overlay, "font-desc", desc, NULL); } GST_PLAY_SINK_UNLOCK (playsink); } gchar * gst_play_sink_get_font_desc (GstPlaySink * playsink) { gchar *result = NULL; GstPlayTextChain *chain; GST_PLAY_SINK_LOCK (playsink); chain = (GstPlayTextChain *) playsink->textchain; if (chain && chain->overlay) { g_object_get (chain->overlay, "font-desc", &result, NULL); playsink->font_desc = g_strdup (result); } else { result = g_strdup (playsink->font_desc); } GST_PLAY_SINK_UNLOCK (playsink); return result; } /** * gst_play_sink_get_last_frame: * @playsink: a #GstPlaySink * * Get the last displayed frame from @playsink. This frame is in the native * format of the sink element, the caps on the result buffer contain the format * of the frame data. * * Returns: a #GstBuffer with the frame data or %NULL when no video frame is * available. */ GstBuffer * gst_play_sink_get_last_frame (GstPlaySink * playsink) { GstBuffer *result = NULL; GstPlayVideoChain *chain; GST_PLAY_SINK_LOCK (playsink); GST_DEBUG_OBJECT (playsink, "taking last frame"); /* get the video chain if we can */ if ((chain = (GstPlayVideoChain *) playsink->videochain)) { GST_DEBUG_OBJECT (playsink, "found video chain"); /* see if the chain is active */ if (chain->chain.activated && chain->sink) { GstElement *elem; GST_DEBUG_OBJECT (playsink, "video chain active and has a sink"); /* find and get the last-buffer property now */ if ((elem = gst_play_sink_find_property (playsink, chain->sink, "last-buffer"))) { GST_DEBUG_OBJECT (playsink, "getting last-buffer property"); g_object_get (elem, "last-buffer", &result, NULL); gst_object_unref (elem); } } } GST_PLAY_SINK_UNLOCK (playsink); return result; } /** * gst_play_sink_request_pad * @playsink: a #GstPlaySink * @type: a #GstPlaySinkType * * Create or return a pad of @type. * * Returns: a #GstPad of @type or %NULL when the pad could not be created. */ GstPad * gst_play_sink_request_pad (GstPlaySink * playsink, GstPlaySinkType type) { GstPad *res = NULL; gboolean created = FALSE; gboolean raw = FALSE; GST_PLAY_SINK_LOCK (playsink); switch (type) { case GST_PLAY_SINK_TYPE_AUDIO_RAW: raw = TRUE; case GST_PLAY_SINK_TYPE_AUDIO: if (!playsink->audio_tee) { /* create tee when needed. This element will feed the audio sink chain * and the vis chain. */ playsink->audio_tee = gst_element_factory_make ("tee", "audiotee"); playsink->audio_tee_sink = gst_element_get_static_pad (playsink->audio_tee, "sink"); /* get two request pads */ playsink->audio_tee_vissrc = gst_element_get_request_pad (playsink->audio_tee, "src%d"); playsink->audio_tee_asrc = gst_element_get_request_pad (playsink->audio_tee, "src%d"); gst_bin_add (GST_BIN_CAST (playsink), playsink->audio_tee); gst_element_set_state (playsink->audio_tee, GST_STATE_PAUSED); } if (!playsink->audio_pad) { playsink->audio_pad = gst_ghost_pad_new ("audio_sink", playsink->audio_tee_sink); created = TRUE; } playsink->audio_pad_raw = raw; res = playsink->audio_pad; break; case GST_PLAY_SINK_TYPE_VIDEO_RAW: raw = TRUE; case GST_PLAY_SINK_TYPE_VIDEO: if (!playsink->video_pad) { playsink->video_pad = gst_ghost_pad_new_no_target ("video_sink", GST_PAD_SINK); created = TRUE; } playsink->video_pad_raw = raw; res = playsink->video_pad; break; case GST_PLAY_SINK_TYPE_TEXT: if (!playsink->text_pad) { playsink->text_pad = gst_ghost_pad_new_no_target ("text_sink", GST_PAD_SINK); created = TRUE; } res = playsink->text_pad; break; default: res = NULL; break; } GST_PLAY_SINK_UNLOCK (playsink); if (created && res) { gst_pad_set_active (res, TRUE); gst_element_add_pad (GST_ELEMENT_CAST (playsink), res); } return res; } void gst_play_sink_release_pad (GstPlaySink * playsink, GstPad * pad) { GstPad **res = NULL; GST_PLAY_SINK_LOCK (playsink); if (pad == playsink->video_pad) { res = &playsink->video_pad; } else if (pad == playsink->audio_pad) { res = &playsink->audio_pad; } else if (pad == playsink->text_pad) { res = &playsink->text_pad; } GST_PLAY_SINK_UNLOCK (playsink); if (*res) { gst_pad_set_active (*res, FALSE); gst_element_remove_pad (GST_ELEMENT_CAST (playsink), *res); *res = NULL; } } /* 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_sink_send_event_to_sink (GstPlaySink * playsink, GstEvent * event) { gboolean res = TRUE; if (playsink->videochain) { gst_event_ref (event); if ((res = gst_element_send_event (playsink->videochain->chain.bin, event))) { GST_DEBUG_OBJECT (playsink, "Sent event succesfully to video sink"); goto done; } GST_DEBUG_OBJECT (playsink, "Event failed when sent to video sink"); } if (playsink->audiochain) { gst_event_ref (event); if ((res = gst_element_send_event (playsink->audiochain->chain.bin, event))) { GST_DEBUG_OBJECT (playsink, "Sent event succesfully to audio sink"); goto done; } GST_DEBUG_OBJECT (playsink, "Event failed when sent to audio sink"); } done: gst_event_unref (event); 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_sink_send_event (GstElement * element, GstEvent * event) { gboolean res = FALSE; GstEventType event_type = GST_EVENT_TYPE (event); switch (event_type) { case GST_EVENT_SEEK: GST_DEBUG_OBJECT (element, "Sending seek event to a sink"); res = gst_play_sink_send_event_to_sink (GST_PLAY_SINK (element), event); break; default: res = parent_class->send_event (element, event); break; } return res; } static GstStateChangeReturn gst_play_sink_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstPlaySink *playsink; playsink = GST_PLAY_SINK (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: 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: 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 */ if (playsink->videochain) { activate_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE); add_chain (GST_PLAY_CHAIN (playsink->videochain), FALSE); } if (playsink->audiochain) { activate_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE); add_chain (GST_PLAY_CHAIN (playsink->audiochain), FALSE); } break; default: break; } return ret; }