/* GStreamer * Copyright (C) 2003 Julien Moutte * * 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 "play.h" enum { TIME_TICK, STREAM_LENGTH, HAVE_VIDEO_SIZE, LAST_SIGNAL }; struct _GstPlayPrivate { char *location; GHashTable *elements; gint64 time_nanos; gint64 length_nanos; gint get_length_attempt; guint tick_id; guint length_id; gulong handoff_hid; /* error/debug handling */ GError *error; gchar *debug; }; static guint gst_play_signals[LAST_SIGNAL] = { 0 }; static GstPipelineClass *parent_class = NULL; /* ======================================================= */ /* */ /* Private Methods */ /* */ /* ======================================================= */ static GQuark gst_play_error_quark (void) { static GQuark quark = 0; if (quark == 0) quark = g_quark_from_static_string ("gst-play-error-quark"); return quark; } /* General GError creation */ static void gst_play_error_create (GError ** error, const gchar *message) { /* check if caller wanted an error reported */ if (error == NULL) return; *error = g_error_new (GST_PLAY_ERROR, 0, message); return; } /* GError creation when plugin is missing */ /* FIXME: what if multiple elements could have been used and they're all * missing ? varargs ? */ static void gst_play_error_plugin (const gchar *element, GError ** error) { gchar *message; message = g_strdup_printf ("The %s element could not be found. " "This element is essential for playback. " "Please install the right plug-in and verify " "that it works by running 'gst-inspect %s'", element, element); gst_play_error_create (error, message); g_free (message); return; } #define GST_PLAY_MAKE_OR_ERROR(el, factory, name, error) \ G_STMT_START { \ el = gst_element_factory_make (factory, name); \ if (!GST_IS_ELEMENT (el)) \ { \ gst_play_error_plugin (factory, error); \ return FALSE; \ } \ } G_STMT_END #define GST_PLAY_ERROR_RETURN(error, message) \ G_STMT_START { \ gst_play_error_create (error, message); \ return FALSE; \ } G_STMT_END static gboolean gst_play_pipeline_setup (GstPlay *play, GError **error) { /* Threads */ GstElement *work_thread, *audio_thread, *video_thread; /* Main Thread elements */ GstElement *source, *autoplugger, *audioconvert, *volume, *tee, *identity; GstElement *identity_cs; /* Visualization bin */ GstElement *vis_bin, *vis_queue, *vis_element, *vis_cs; /* Video Thread elements */ GstElement *video_queue, *video_switch, *video_cs, *video_balance; GstElement *balance_cs, *video_scaler, *video_sink; /* Audio Thread elements */ GstElement *audio_queue, *audio_sink; /* Some useful pads */ GstPad *tee_pad1, *tee_pad2; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); /* Creating main thread and its elements */ { GST_PLAY_MAKE_OR_ERROR (work_thread, "thread", "work_thread", error); g_hash_table_insert (play->priv->elements, "work_thread", work_thread); gst_bin_add (GST_BIN (play), work_thread); /* Placeholder for datasrc */ GST_PLAY_MAKE_OR_ERROR (source, "fakesrc", "source", error); g_hash_table_insert (play->priv->elements, "source", source); /* Autoplugger */ GST_PLAY_MAKE_OR_ERROR (autoplugger, "spider", "autoplugger", error); g_hash_table_insert (play->priv->elements, "autoplugger", autoplugger); /* Make sure we convert audio to the needed format */ GST_PLAY_MAKE_OR_ERROR (audioconvert, "audioconvert", "audioconvert", error); /* FIXME: why are volume and audioconvert switched around for the insert ) */ g_hash_table_insert (play->priv->elements, "volume", audioconvert); /* Volume control */ GST_PLAY_MAKE_OR_ERROR (volume, "volume", "volume", error); g_hash_table_insert (play->priv->elements, "audioconvert", volume); /* Duplicate audio signal to audio sink and visualization thread */ GST_PLAY_MAKE_OR_ERROR (tee, "tee", "tee", error); tee_pad1 = gst_element_get_request_pad (tee, "src%d"); tee_pad2 = gst_element_get_request_pad (tee, "src%d"); g_hash_table_insert (play->priv->elements, "tee_pad1", tee_pad1); g_hash_table_insert (play->priv->elements, "tee_pad2", tee_pad2); g_hash_table_insert (play->priv->elements, "tee", tee); gst_bin_add_many (GST_BIN (work_thread), source, autoplugger,/* audioconvert,*/ volume, tee, NULL); if (!gst_element_link_many (source, autoplugger,/* audioconvert,*/ volume, tee, NULL)) GST_PLAY_ERROR_RETURN (error, "Could not link source thread elements"); /* identity ! colorspace ! switch */ GST_PLAY_MAKE_OR_ERROR (identity, "identity", "identity", error); g_hash_table_insert (play->priv->elements, "identity", identity); identity_cs = gst_element_factory_make ("ffcolorspace", "identity_cs"); if (!GST_IS_ELEMENT (identity_cs)) { identity_cs = gst_element_factory_make ("colorspace", "identity_cs"); if (!GST_IS_ELEMENT (identity_cs)) { gst_play_error_plugin ("colorspace", error); return FALSE; } } g_hash_table_insert (play->priv->elements, "identity_cs", identity_cs); gst_bin_add_many (GST_BIN (work_thread), identity, identity_cs, NULL); if (!gst_element_link_many (autoplugger, identity, identity_cs, NULL)) GST_PLAY_ERROR_RETURN (error, "Could not link work thread elements"); } /* Visualization bin (note: it s not added to the pipeline yet) */ { vis_bin = gst_bin_new ("vis_bin"); if (!GST_IS_ELEMENT (vis_bin)) { gst_play_error_plugin ("bin", error); return FALSE; } g_hash_table_insert (play->priv->elements, "vis_bin", vis_bin); /* Buffer queue for video data */ GST_PLAY_MAKE_OR_ERROR (vis_queue, "queue", "vis_queue", error); g_hash_table_insert (play->priv->elements, "vis_queue", vis_queue); /* Visualization element placeholder */ GST_PLAY_MAKE_OR_ERROR (vis_element, "identity", "vis_element", error); g_hash_table_insert (play->priv->elements, "vis_element", vis_element); /* Colorspace conversion */ vis_cs = gst_element_factory_make ("ffcolorspace", "vis_cs"); if (!GST_IS_ELEMENT (vis_cs)) { vis_cs = gst_element_factory_make ("colorspace", "vis_cs"); if (!GST_IS_ELEMENT (vis_cs)) { gst_play_error_plugin ("colorspace", error); return FALSE; } } g_hash_table_insert (play->priv->elements, "vis_cs", vis_cs); gst_bin_add_many (GST_BIN (vis_bin), vis_queue, vis_element, vis_cs, NULL); if (!gst_element_link_many (vis_queue, vis_element, vis_cs, NULL)) GST_PLAY_ERROR_RETURN (error, "Could not link visualisation thread elements"); gst_element_add_ghost_pad (vis_bin, gst_element_get_pad (vis_cs, "src"), "src"); } /* Creating our video output bin */ { GST_PLAY_MAKE_OR_ERROR (video_thread, "thread", "video_thread", error); g_hash_table_insert (play->priv->elements, "video_thread", video_thread); gst_bin_add (GST_BIN (work_thread), video_thread); /* Buffer queue for video data */ GST_PLAY_MAKE_OR_ERROR (video_queue, "queue", "video_queue", error); g_hash_table_insert (play->priv->elements, "video_queue", video_queue); GST_PLAY_MAKE_OR_ERROR (video_switch, "switch", "video_switch", error); g_hash_table_insert (play->priv->elements, "video_switch", video_switch); /* Colorspace conversion */ video_cs = gst_element_factory_make ("ffcolorspace", "video_cs"); if (!GST_IS_ELEMENT (video_cs)) { video_cs = gst_element_factory_make ("colorspace", "video_cs"); if (!GST_IS_ELEMENT (video_cs)) { gst_play_error_plugin ("colorspace", error); return FALSE; } } g_hash_table_insert (play->priv->elements, "video_cs", video_cs); /* Software colorbalance */ GST_PLAY_MAKE_OR_ERROR (video_balance, "videobalance", "video_balance", error); g_hash_table_insert (play->priv->elements, "video_balance", video_balance); /* Colorspace conversion */ balance_cs = gst_element_factory_make ("ffcolorspace", "balance_cs"); if (!GST_IS_ELEMENT (balance_cs)) { balance_cs = gst_element_factory_make ("colorspace", "balance_cs"); if (!GST_IS_ELEMENT (balance_cs)) { gst_play_error_plugin ("colorspace", error); return FALSE; } } g_hash_table_insert (play->priv->elements, "balance_cs", balance_cs); /* Software scaling of video stream */ GST_PLAY_MAKE_OR_ERROR (video_scaler, "videoscale", "video_scaler", error); g_hash_table_insert (play->priv->elements, "video_scaler", video_scaler); /* Placeholder for future video sink bin */ GST_PLAY_MAKE_OR_ERROR (video_sink, "fakesink", "video_sink", error); g_hash_table_insert (play->priv->elements, "video_sink", video_sink); gst_bin_add_many (GST_BIN (video_thread), video_queue, video_switch, video_cs, video_balance, balance_cs, video_scaler, video_sink, NULL); if (!gst_element_link_many (video_queue, video_switch, video_cs, video_balance, balance_cs, video_scaler, video_sink, NULL)) GST_PLAY_ERROR_RETURN (error, "Could not link video output thread elements"); gst_element_add_ghost_pad (video_thread, gst_element_get_pad (video_queue, "sink"), "sink"); if (!gst_element_link (identity_cs, video_thread)) GST_PLAY_ERROR_RETURN (error, "Could not link video output thread elements"); } /* Creating our audio output bin { queue ! fakesink } */ { GST_PLAY_MAKE_OR_ERROR (audio_thread, "thread", "audio_thread", error); g_hash_table_insert (play->priv->elements, "audio_thread", audio_thread); gst_bin_add (GST_BIN (work_thread), audio_thread); /* Buffer queue for our audio thread */ GST_PLAY_MAKE_OR_ERROR (audio_queue, "queue", "audio_queue", error); g_hash_table_insert (play->priv->elements, "audio_queue", audio_queue); /* Placeholder for future audio sink bin */ GST_PLAY_MAKE_OR_ERROR (audio_sink, "fakesink", "audio_sink", error); g_hash_table_insert (play->priv->elements, "audio_sink", audio_sink); gst_bin_add_many (GST_BIN (audio_thread), audio_queue, audio_sink, NULL); if (!gst_element_link (audio_queue, audio_sink)) GST_PLAY_ERROR_RETURN (error, "Could not link audio output thread elements"); gst_element_add_ghost_pad (audio_thread, gst_element_get_pad (audio_queue, "sink"), "sink"); gst_pad_link (tee_pad2, gst_element_get_pad (audio_queue, "sink")); } return TRUE; } static void gst_play_have_video_size (GstElement *element, gint width, gint height, GstPlay *play) { g_return_if_fail (play != NULL); g_return_if_fail (GST_IS_PLAY (play)); g_signal_emit (G_OBJECT (play), gst_play_signals[HAVE_VIDEO_SIZE], 0, width, height); } static gboolean gst_play_tick_callback (GstPlay *play) { GstFormat format = GST_FORMAT_TIME; gboolean q = FALSE; GstElement *audio_sink_element = NULL; g_return_val_if_fail (play != NULL, FALSE); if (!GST_IS_PLAY (play)) { play->priv->tick_id = 0; return FALSE; } audio_sink_element = g_hash_table_lookup (play->priv->elements, "audio_sink_element"); if (!GST_IS_ELEMENT (audio_sink_element)) { play->priv->tick_id = 0; return FALSE; } q = gst_element_query (audio_sink_element, GST_QUERY_POSITION, &format, &(play->priv->time_nanos)); if (q) g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK], 0,play->priv->time_nanos); if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) return TRUE; else { play->priv->tick_id = 0; return FALSE; } } static gboolean gst_play_get_length_callback (GstPlay *play) { GstElement *audio_sink_element, *video_sink_element; GstFormat format = GST_FORMAT_TIME; gint64 value; gboolean q = FALSE; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); /* We try to get length from all real sink elements */ audio_sink_element = g_hash_table_lookup (play->priv->elements, "audio_sink_element"); video_sink_element = g_hash_table_lookup (play->priv->elements, "video_sink_element"); if (!GST_IS_ELEMENT (audio_sink_element) && !GST_IS_ELEMENT (video_sink_element)) { play->priv->length_id = 0; return FALSE; } /* Audio first and then Video */ if (GST_IS_ELEMENT (audio_sink_element)) q = gst_element_query (audio_sink_element, GST_QUERY_TOTAL, &format, &value); if ( (!q) && (GST_IS_ELEMENT (video_sink_element)) ) q = gst_element_query (video_sink_element, GST_QUERY_TOTAL, &format, &value); if (q) { play->priv->length_nanos = value; g_signal_emit (G_OBJECT (play), gst_play_signals[STREAM_LENGTH], 0,play->priv->length_nanos); play->priv->length_id = 0; return FALSE; } play->priv->get_length_attempt++; /* We try 16 times */ if (play->priv->get_length_attempt > 15) { play->priv->length_id = 0; return FALSE; } else return TRUE; } static void gst_play_state_change (GstElement *element, GstElementState old, GstElementState state) { GstPlay *play; g_return_if_fail (element != NULL); g_return_if_fail (GST_IS_PLAY (element)); play = GST_PLAY (element); if (state == GST_STATE_PLAYING) { if (play->priv->tick_id) { g_source_remove (play->priv->tick_id); play->priv->tick_id = 0; } play->priv->tick_id = g_timeout_add (200, (GSourceFunc) gst_play_tick_callback, play); play->priv->get_length_attempt = 0; if (play->priv->length_id) { g_source_remove (play->priv->length_id); play->priv->length_id = 0; } play->priv->length_id = g_timeout_add (200, (GSourceFunc) gst_play_get_length_callback, play); } if (GST_ELEMENT_CLASS (parent_class)->state_change) GST_ELEMENT_CLASS (parent_class)->state_change (element, old, state); } static void gst_play_identity_handoff (GstElement *identity, GstBuffer *buf, GstPlay *play) { g_signal_handler_disconnect (G_OBJECT (identity), play->priv->handoff_hid); play->priv->handoff_hid = 0; gst_play_connect_visualization (play, FALSE); } /* =========================================== */ /* */ /* Init & Dispose & Class init */ /* */ /* =========================================== */ static void gst_play_dispose (GObject *object) { GstPlay *play; g_return_if_fail (object != NULL); g_return_if_fail (GST_IS_PLAY (object)); play = GST_PLAY (object); if (play->priv->length_id) { g_source_remove (play->priv->length_id); play->priv->length_id = 0; } if (play->priv->tick_id) { g_source_remove (play->priv->tick_id); play->priv->tick_id = 0; } if (play->priv->location) { g_free (play->priv->location); play->priv->location = NULL; } if (play->priv->elements) { g_hash_table_destroy (play->priv->elements); play->priv->elements = NULL; } G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_play_init (GstPlay *play) { play->priv = g_new0 (GstPlayPrivate, 1); play->priv->location = NULL; play->priv->length_nanos = 0; play->priv->time_nanos = 0; play->priv->elements = g_hash_table_new (g_str_hash, g_str_equal); play->priv->error = NULL; play->priv->debug = NULL; if (!gst_play_pipeline_setup (play, &play->priv->error)) { g_warning ("libgstplay: failed initializing pipeline, error: %s", play->priv->error->message); } } static void gst_play_class_init (GstPlayClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); parent_class = g_type_class_peek_parent (klass); gobject_class->dispose = gst_play_dispose; element_class->state_change = gst_play_state_change; gst_play_signals[TIME_TICK] = g_signal_new ("time_tick", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GstPlayClass, time_tick), NULL, NULL, gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64); gst_play_signals[STREAM_LENGTH] = g_signal_new ("stream_length", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GstPlayClass, stream_length), NULL, NULL, gst_marshal_VOID__INT64, G_TYPE_NONE, 1, G_TYPE_INT64); gst_play_signals[HAVE_VIDEO_SIZE] = g_signal_new ("have_video_size", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GstPlayClass, have_video_size), NULL, NULL, gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2, G_TYPE_INT, G_TYPE_INT); } /* ======================================================= */ /* */ /* Public Methods */ /* */ /* ======================================================= */ /** * gst_play_set_location: * @play: a #GstPlay. * @location: a const #char* indicating location to play * * Set location of @play to @location. * * Returns: TRUE if location was set successfully. */ gboolean gst_play_set_location (GstPlay *play, const char *location) { GstElement *work_thread, *source, *autoplugger; GstElement *audioconvert, *identity; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); if (play->priv->location) g_free (play->priv->location); play->priv->location = g_strdup (location); if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY) gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY); work_thread = g_hash_table_lookup (play->priv->elements, "work_thread"); if (!GST_IS_ELEMENT (work_thread)) return FALSE; source = g_hash_table_lookup (play->priv->elements, "source"); if (!GST_IS_ELEMENT (source)) return FALSE; autoplugger = g_hash_table_lookup (play->priv->elements, "autoplugger"); if (!GST_IS_ELEMENT (autoplugger)) return FALSE; audioconvert = g_hash_table_lookup (play->priv->elements, "audioconvert"); if (!GST_IS_ELEMENT (audioconvert)) return FALSE; identity = g_hash_table_lookup (play->priv->elements, "identity"); if (!GST_IS_ELEMENT (identity)) return FALSE; /* Spider can autoplugg only once. We remove the actual one and put a new autoplugger */ gst_element_unlink (source, autoplugger); gst_element_unlink (autoplugger, identity); gst_element_unlink (autoplugger, audioconvert); gst_bin_remove (GST_BIN (work_thread), autoplugger); autoplugger = gst_element_factory_make ("spider", "autoplugger"); if (!GST_IS_ELEMENT (autoplugger)) return FALSE; gst_bin_add (GST_BIN (work_thread), autoplugger); gst_element_link (source, autoplugger); gst_element_link (autoplugger, audioconvert); gst_element_link (autoplugger, identity); g_hash_table_replace (play->priv->elements, "autoplugger", autoplugger); /* FIXME: Why don't we have an interface to do that kind of stuff ? */ g_object_set (G_OBJECT (source), "location", play->priv->location, NULL); play->priv->length_nanos = 0LL; play->priv->time_nanos = 0LL; g_signal_emit (G_OBJECT (play), gst_play_signals[STREAM_LENGTH], 0, 0LL); g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK], 0, 0LL); return TRUE; } /** * gst_play_get_location: * @play: a #GstPlay. * * Get current location of @play. * * Returns: a const #char* pointer to current location. */ char * gst_play_get_location (GstPlay *play) { g_return_val_if_fail (play != NULL, NULL); g_return_val_if_fail (GST_IS_PLAY (play), NULL); return g_strdup (play->priv->location); } /** * gst_play_seek_to_time: * @play: a #GstPlay. * @time_nanos: a #gint64 indicating a time position. * * Performs a seek on @play until @time_nanos. */ gboolean gst_play_seek_to_time (GstPlay * play, gint64 time_nanos) { GstElement *audio_seek_element, *video_seek_element, *audio_sink_element; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); if (time_nanos < 0LL) time_nanos = 0LL; audio_seek_element = g_hash_table_lookup (play->priv->elements, "audioconvert"); audio_sink_element = g_hash_table_lookup (play->priv->elements, "audio_sink_element"); video_seek_element = g_hash_table_lookup (play->priv->elements, "identity"); if (GST_IS_ELEMENT (audio_seek_element) && GST_IS_ELEMENT (video_seek_element) && GST_IS_ELEMENT (audio_sink_element)) { gboolean s = FALSE; /* We block the tick signal while seeking */ if (play->priv->tick_id) g_signal_handler_block (G_OBJECT (play), play->priv->tick_id); s = gst_element_seek (video_seek_element, GST_FORMAT_TIME | GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, time_nanos); if (!s) { s = gst_element_seek (audio_seek_element, GST_FORMAT_TIME | GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, time_nanos); } /* We unblock the tick signal after seeking */ if (play->priv->tick_id) g_signal_handler_unblock (G_OBJECT (play), play->priv->tick_id); if (s) { GstFormat format = GST_FORMAT_TIME; gboolean q = FALSE; q = gst_element_query (audio_sink_element, GST_QUERY_POSITION, &format, &(play->priv->time_nanos)); if (q) g_signal_emit (G_OBJECT (play), gst_play_signals[TIME_TICK], 0,play->priv->time_nanos); } } return TRUE; } /** * gst_play_set_data_src: * @play: a #GstPlay. * @data_src: a #GstElement. * * Set @data_src as the source element of @play. * * Returns: TRUE if call succeeded. */ gboolean gst_play_set_data_src (GstPlay *play, GstElement *data_src) { GstElement *work_thread, *old_data_src, *autoplugger; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); /* We bring back the pipeline to READY */ if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY) gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY); /* Getting needed objects */ work_thread = g_hash_table_lookup (play->priv->elements, "work_thread"); if (!GST_IS_ELEMENT (work_thread)) return FALSE; old_data_src = g_hash_table_lookup (play->priv->elements, "source"); if (!GST_IS_ELEMENT (old_data_src)) return FALSE; autoplugger = g_hash_table_lookup (play->priv->elements, "autoplugger"); if (!GST_IS_ELEMENT (autoplugger)) return FALSE; /* Unlinking old source from autoplugger, removing it from pipeline, adding the new one and connecting it to autoplugger FIXME: we should put a new autoplugger here as spider can autoplugg only once */ gst_element_unlink (old_data_src, autoplugger); gst_bin_remove (GST_BIN (work_thread), old_data_src); gst_bin_add (GST_BIN (work_thread), data_src); gst_element_link (data_src, autoplugger); g_hash_table_replace (play->priv->elements, "source", data_src); return TRUE; } /** * gst_play_set_video_sink: * @play: a #GstPlay. * @video_sink: a #GstElement. * * Set @video_sink as the video sink element of @play. * * Returns: TRUE if call succeeded. */ gboolean gst_play_set_video_sink (GstPlay *play, GstElement *video_sink) { GstElement *video_thread, *old_video_sink, *video_scaler, *video_sink_element; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); g_return_val_if_fail (video_sink != NULL, FALSE); g_return_val_if_fail (GST_IS_ELEMENT (video_sink), FALSE); /* We bring back the pipeline to READY */ if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY) gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY); /* Getting needed objects */ video_thread = g_hash_table_lookup (play->priv->elements, "video_thread"); if (!GST_IS_ELEMENT (video_thread)) return FALSE; old_video_sink = g_hash_table_lookup (play->priv->elements, "video_sink"); if (!GST_IS_ELEMENT (old_video_sink)) return FALSE; video_scaler = g_hash_table_lookup (play->priv->elements, "video_scaler"); if (!GST_IS_ELEMENT (video_scaler)) return FALSE; /* Unlinking old video sink from video scaler, removing it from pipeline, adding the new one and linking it */ gst_element_unlink (video_scaler, old_video_sink); gst_bin_remove (GST_BIN (video_thread), old_video_sink); gst_bin_add (GST_BIN (video_thread), video_sink); gst_element_link (video_scaler, video_sink); g_hash_table_replace (play->priv->elements, "video_sink", video_sink); video_sink_element = gst_play_get_sink_element (play, video_sink, GST_PLAY_SINK_TYPE_VIDEO); if (GST_IS_ELEMENT (video_sink_element)) { g_hash_table_replace (play->priv->elements, "video_sink_element", video_sink_element); if (GST_IS_X_OVERLAY (video_sink_element)) { g_signal_connect (G_OBJECT (video_sink_element), "desired_size_changed", G_CALLBACK (gst_play_have_video_size), play); } } gst_element_set_state (video_sink, GST_STATE (GST_ELEMENT(play))); return TRUE; } /** * gst_play_set_audio_sink: * @play: a #GstPlay. * @audio_sink: a #GstElement. * * Set @audio_sink as the audio sink element of @play. * * Returns: TRUE if call succeeded. */ gboolean gst_play_set_audio_sink (GstPlay *play, GstElement *audio_sink) { GstElement *old_audio_sink, *audio_thread, *audio_queue, *audio_sink_element; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); g_return_val_if_fail (audio_sink != NULL, FALSE); g_return_val_if_fail (GST_IS_ELEMENT (audio_sink), FALSE); /* We bring back the pipeline to READY */ if (GST_STATE (GST_ELEMENT (play)) != GST_STATE_READY) gst_element_set_state (GST_ELEMENT (play), GST_STATE_READY); /* Getting needed objects */ old_audio_sink = g_hash_table_lookup (play->priv->elements, "audio_sink"); if (!GST_IS_ELEMENT (old_audio_sink)) return FALSE; audio_thread = g_hash_table_lookup (play->priv->elements, "audio_thread"); if (!GST_IS_ELEMENT (audio_thread)) return FALSE; audio_queue = g_hash_table_lookup (play->priv->elements, "audio_queue"); if (!GST_IS_ELEMENT (audio_queue)) return FALSE; /* Unlinking old audiosink, removing it from pipeline, putting the new one and linking it */ gst_element_unlink (audio_queue, old_audio_sink); gst_bin_remove (GST_BIN (audio_thread), old_audio_sink); gst_bin_add (GST_BIN (audio_thread), audio_sink); gst_element_link (audio_queue, audio_sink); g_hash_table_replace (play->priv->elements, "audio_sink", audio_sink); audio_sink_element = gst_play_get_sink_element (play, audio_sink, GST_PLAY_SINK_TYPE_AUDIO); if (GST_IS_ELEMENT (audio_sink_element)) { g_hash_table_replace (play->priv->elements, "audio_sink_element", audio_sink_element); } gst_element_set_state (audio_sink, GST_STATE (GST_ELEMENT(play))); return TRUE; } /** * gst_play_set_visualization: * @play: a #GstPlay. * @element: a #GstElement. * * Set @video_sink as the video sink element of @play. * * Returns: TRUE if call succeeded. */ gboolean gst_play_set_visualization (GstPlay *play, GstElement *vis_element) { GstElement *vis_bin, *vis_queue, *old_vis_element, *vis_cs; gboolean was_playing = FALSE; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); g_return_val_if_fail (vis_element != NULL, FALSE); g_return_val_if_fail (GST_IS_ELEMENT (vis_element), FALSE); /* Getting needed objects */ vis_bin = g_hash_table_lookup (play->priv->elements, "vis_bin"); if (!GST_IS_ELEMENT (vis_bin)) return FALSE; vis_queue = g_hash_table_lookup (play->priv->elements, "vis_queue"); if (!GST_IS_ELEMENT (vis_queue)) return FALSE; old_vis_element = g_hash_table_lookup (play->priv->elements, "vis_element"); if (!GST_IS_ELEMENT (old_vis_element)) return FALSE; vis_cs = g_hash_table_lookup (play->priv->elements, "vis_cs"); if (!GST_IS_ELEMENT (vis_cs)) return FALSE; /* We bring back the pipeline to PAUSED */ if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) { gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED); was_playing = TRUE; } gst_element_unlink_many (vis_queue, old_vis_element, vis_cs, NULL); gst_bin_remove (GST_BIN (vis_bin), old_vis_element); gst_bin_add (GST_BIN (vis_bin), vis_element); gst_element_link_many (vis_queue, vis_element, vis_cs, NULL); g_hash_table_replace (play->priv->elements, "vis_element", vis_element); if (was_playing) gst_element_set_state (GST_ELEMENT (play), GST_STATE_PLAYING); return TRUE; } /** * gst_play_connect_visualization: * @play: a #GstPlay. * @connect: a #gboolean indicating wether or not * visualization should be connected. * * Connect or disconnect visualization bin in @play. * * Returns: TRUE if call succeeded. */ gboolean gst_play_connect_visualization (GstPlay * play, gboolean connect) { GstElement *video_thread, *vis_queue, *vis_bin, *video_switch, *identity; GstPad *tee_pad1, *vis_queue_pad, *vis_bin_pad, *switch_pad; gboolean was_playing = FALSE; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); /* Getting needed objects */ video_thread = g_hash_table_lookup (play->priv->elements, "video_thread"); if (!GST_IS_ELEMENT (video_thread)) return FALSE; vis_bin = g_hash_table_lookup (play->priv->elements, "vis_bin"); if (!GST_IS_ELEMENT (vis_bin)) return FALSE; vis_queue = g_hash_table_lookup (play->priv->elements, "vis_queue"); if (!GST_IS_ELEMENT (vis_queue)) return FALSE; video_switch = g_hash_table_lookup (play->priv->elements, "video_switch"); if (!GST_IS_ELEMENT (video_switch)) return FALSE; identity = g_hash_table_lookup (play->priv->elements, "identity"); if (!GST_IS_ELEMENT (identity)) return FALSE; tee_pad1 = g_hash_table_lookup (play->priv->elements, "tee_pad1"); if (!GST_IS_PAD (tee_pad1)) return FALSE; vis_queue_pad = gst_element_get_pad (vis_queue, "sink"); /* Check if the vis element is in the pipeline. That means visualization is connected already */ if (gst_element_get_managing_bin (vis_bin)) { /* If we are supposed to connect then nothing to do we return */ if (connect) { return TRUE; } /* Disconnecting visualization */ /* We bring back the pipeline to PAUSED */ if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) { gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED); was_playing = TRUE; } /* Unlinking, removing */ gst_pad_unlink (tee_pad1, vis_queue_pad); vis_bin_pad = gst_element_get_pad (vis_bin, "src"); switch_pad = gst_pad_get_peer (vis_bin_pad); gst_pad_unlink (vis_bin_pad, switch_pad); gst_element_release_request_pad (video_switch, switch_pad); gst_object_ref (GST_OBJECT (vis_bin)); gst_bin_remove (GST_BIN (video_thread), vis_bin); } else { /* If we are supposed to disconnect then nothing to do we return */ if (!connect) { return TRUE; } /* Connecting visualization */ /* We bring back the pipeline to PAUSED */ if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) { gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED); was_playing = TRUE; } /* Adding, linking */ play->priv->handoff_hid = g_signal_connect (G_OBJECT (identity), "handoff", G_CALLBACK (gst_play_identity_handoff), play); gst_bin_add (GST_BIN (video_thread), vis_bin); gst_pad_link (tee_pad1, vis_queue_pad); gst_element_link (vis_bin, video_switch); } if (was_playing) gst_element_set_state (GST_ELEMENT (play), GST_STATE_PLAYING); return TRUE; } /** * gst_play_get_sink_element: * @play: a #GstPlay. * @element: a #GstElement. * @sink_type: a #GstPlaySinkType. * * Searches recursively for a sink #GstElement with * type @sink_type in @element which is supposed to be a #GstBin. * * Returns: the sink #GstElement of @element. */ GstElement * gst_play_get_sink_element (GstPlay *play, GstElement *element, GstPlaySinkType sink_type) { GList *elements = NULL; const GList *pads = NULL; gboolean has_src, has_correct_type; g_return_val_if_fail (play != NULL, NULL); g_return_val_if_fail (element != NULL, NULL); g_return_val_if_fail (GST_IS_PLAY (play), NULL); g_return_val_if_fail (GST_IS_ELEMENT (element), NULL); if (!GST_IS_BIN (element)) { /* since its not a bin, we'll presume this * element is a sink element */ return element; } elements = (GList *) gst_bin_get_list (GST_BIN (element)); /* traverse all elements looking for a src pad */ while (elements) { element = GST_ELEMENT (elements->data); /* Recursivity :) */ if (GST_IS_BIN (element)) { element = gst_play_get_sink_element (play, element, sink_type); if (GST_IS_ELEMENT (element)) return element; } else { pads = gst_element_get_pad_list (element); has_src = FALSE; has_correct_type = FALSE; while (pads) { /* check for src pad */ if (GST_PAD_DIRECTION (GST_PAD (pads->data)) == GST_PAD_SRC) { has_src = TRUE; break; } else { /* If not a src pad checking caps */ GstCaps *caps; GstStructure *structure; gboolean has_video_cap = FALSE; gboolean has_audio_cap = FALSE; caps = gst_pad_get_caps (GST_PAD (pads->data)); structure = gst_caps_get_structure (caps, 0); if (strcmp (gst_structure_get_name (structure), "audio/x-raw-int") == 0) { has_audio_cap = TRUE; } if (strcmp (gst_structure_get_name (structure), "video/x-raw-yuv") == 0 || strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) { has_video_cap = TRUE; } gst_caps_free (caps); switch (sink_type) { case GST_PLAY_SINK_TYPE_AUDIO: if (has_audio_cap) has_correct_type = TRUE; break;; case GST_PLAY_SINK_TYPE_VIDEO: if (has_video_cap) has_correct_type = TRUE; break;; case GST_PLAY_SINK_TYPE_ANY: if ((has_video_cap) || (has_audio_cap)) has_correct_type = TRUE; break;; default: has_correct_type = FALSE; } } pads = g_list_next (pads); } if ((!has_src) && (has_correct_type)) return element; } elements = g_list_next (elements); } /* we didn't find a sink element */ return NULL; } GstPlay * gst_play_new (GError **error) { GstPlay *play = g_object_new (GST_TYPE_PLAY, NULL); if (play->priv->error) { if (error) { *error = play->priv->error; play->priv->error = NULL; } else { g_warning ("Error creating GstPlay object.\n%s", play->priv->error->message); g_error_free (play->priv->error); } } return play; } /* =========================================== */ /* */ /* Object typing & Creation */ /* */ /* =========================================== */ GType gst_play_get_type (void) { static GType play_type = 0; if (!play_type) { static const GTypeInfo play_info = { sizeof (GstPlayClass), NULL, NULL, (GClassInitFunc) gst_play_class_init, NULL, NULL, sizeof (GstPlay), 0, (GInstanceInitFunc) gst_play_init, NULL }; play_type = g_type_register_static (GST_TYPE_PIPELINE, "GstPlay", &play_info, 0); } return play_type; }