/* 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 "gstplay.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; }; static guint gst_play_signals[LAST_SIGNAL] = { 0 }; static GstPipelineClass *parent_class = NULL; /* ======================================================= */ /* */ /* Private Methods */ /* */ /* ======================================================= */ static gboolean gst_play_pipeline_setup (GstPlay *play) { GstElement *work_thread, *video_thread, *source; GstElement *autoplugger, *switch_colorspace, *video_switch, *video_queue; GstElement *video_balance, *video_colorspace, *video_scaler, *video_sink; GstElement *audio_thread, *audio_queue, *audio_volume, *audio_sink; GstElement *audio_tee, *vis_thread, *vis_queue, *vis_element, *end_vis_queue; GstPad *audio_tee_pad1, *audio_tee_pad2, *vis_thread_pad, *audio_sink_pad; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); work_thread = gst_element_factory_make ("thread", "work_thread"); if (!GST_IS_ELEMENT (work_thread)) return FALSE; g_hash_table_insert (play->priv->elements, "work_thread", work_thread); gst_bin_add (GST_BIN (play), work_thread); /* Placeholder for the source and autoplugger { fakesrc ! spider } */ source = gst_element_factory_make ("fakesrc", "source"); if (!GST_IS_ELEMENT (source)) return FALSE; g_hash_table_insert (play->priv->elements, "source", source); autoplugger = gst_element_factory_make ("spider", "autoplugger"); if (!GST_IS_ELEMENT (autoplugger)) return FALSE; g_hash_table_insert (play->priv->elements, "autoplugger", autoplugger); gst_bin_add_many (GST_BIN (work_thread), source, autoplugger, NULL); gst_element_link (source, autoplugger); /* Creating our video output bin { queue ! videobalance ! colorspace ! videoscale ! fakesink } */ video_thread = gst_element_factory_make ("thread", "video_thread"); if (!GST_IS_ELEMENT (video_thread)) return FALSE; g_hash_table_insert (play->priv->elements, "video_thread", video_thread); gst_bin_add (GST_BIN (work_thread), video_thread); /* Buffer queue for our video thread */ video_queue = gst_element_factory_make ("queue", "video_queue"); if (!GST_IS_ELEMENT (video_queue)) return FALSE; g_hash_table_insert (play->priv->elements, "video_queue", video_queue); video_balance = gst_element_factory_make ("videobalance", "video_balance"); if (!GST_IS_ELEMENT (video_balance)) return FALSE; g_hash_table_insert (play->priv->elements, "video_balance", video_balance); /* Colorspace conversion */ video_colorspace = gst_element_factory_make ("ffcolorspace", "video_colorspace"); if (!GST_IS_ELEMENT (video_colorspace)) { video_colorspace = gst_element_factory_make ("colorspace", "video_colorspace"); if (!GST_IS_ELEMENT (video_colorspace)) return FALSE; } g_hash_table_insert (play->priv->elements, "video_colorspace", video_colorspace); /* Software scaling of video stream */ video_scaler = gst_element_factory_make ("videoscale", "video_scaler"); if (!GST_IS_ELEMENT (video_scaler)) return FALSE; g_hash_table_insert (play->priv->elements, "video_scaler", video_scaler); /* Placeholder for future video sink bin */ video_sink = gst_element_factory_make ("fakesink", "video_sink"); if (!GST_IS_ELEMENT (video_sink)) return FALSE; g_hash_table_insert (play->priv->elements, "video_sink", video_sink); /* Linking, Adding, Ghosting */ gst_element_link_many (video_queue, video_balance, video_colorspace, video_scaler, video_sink, NULL); gst_bin_add_many (GST_BIN (video_thread), video_queue, video_balance, video_colorspace, video_scaler, video_sink, NULL); gst_element_add_ghost_pad (video_thread, gst_element_get_pad (video_queue, "sink"), "sink"); /* autoplugger ! ffcolorspace ! switch */ switch_colorspace = NULL; switch_colorspace = gst_element_factory_make ("ffcolorspace", "switch_colorspace"); if (!GST_IS_ELEMENT (switch_colorspace)) { switch_colorspace = gst_element_factory_make ("colorspace", "switch_colorspace"); if (!GST_IS_ELEMENT (switch_colorspace)) return FALSE; } g_hash_table_insert (play->priv->elements, "switch_colorspace", switch_colorspace); video_switch = gst_element_factory_make ("switch", "video_switch"); if (!GST_IS_ELEMENT (video_switch)) return FALSE; g_hash_table_insert (play->priv->elements, "video_switch", video_switch); gst_bin_add_many (GST_BIN (work_thread), switch_colorspace, /*video_switch,*/ NULL); /* Connecting autoplugger to video switch and video switch to video output */ gst_element_link_many (autoplugger, switch_colorspace, /*video_switch,*/ video_thread, NULL); /* gst_element_link (autoplugger, video_thread); */ /* Creating our audio output bin { queue ! volume ! tee ! { queue ! goom } ! fakesink } */ audio_thread = gst_element_factory_make ("thread", "audio_thread"); if (!GST_IS_ELEMENT (audio_thread)) return FALSE; 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 */ audio_queue = gst_element_factory_make ("queue", "audio_queue"); if (!GST_IS_ELEMENT (audio_queue)) return FALSE; g_hash_table_insert (play->priv->elements, "audio_queue", audio_queue); /* Volume control */ audio_volume = gst_element_factory_make ("volume", "audio_volume"); if (!GST_IS_ELEMENT (audio_volume)) return FALSE; g_hash_table_insert (play->priv->elements, "audio_volume", audio_volume); /* Duplicate audio signal to sink and visualization thread */ audio_tee = gst_element_factory_make ("tee", "audio_tee"); if (!GST_IS_ELEMENT (audio_tee)) return FALSE; audio_tee_pad1 = gst_element_get_request_pad (audio_tee, "src%d"); audio_tee_pad2 = gst_element_get_request_pad (audio_tee, "src%d"); g_hash_table_insert (play->priv->elements, "audio_tee_pad1", audio_tee_pad1); g_hash_table_insert (play->priv->elements, "audio_tee_pad2", audio_tee_pad2); g_hash_table_insert (play->priv->elements, "audio_tee", audio_tee); /* Placeholder for future audio sink bin */ audio_sink = gst_element_factory_make ("fakesink", "audio_sink"); if (!GST_IS_ELEMENT (audio_sink)) return FALSE; audio_sink_pad = gst_element_get_pad (audio_sink, "sink"); g_hash_table_insert (play->priv->elements, "audio_sink_pad", audio_sink_pad); g_hash_table_insert (play->priv->elements, "audio_sink", audio_sink); /* Visualization thread */ vis_thread = gst_element_factory_make ("thread", "vis_thread"); if (!GST_IS_ELEMENT (vis_thread)) return FALSE; g_hash_table_insert (play->priv->elements, "vis_thread", vis_thread); /* Buffer queue for our visualization thread */ vis_queue = gst_element_factory_make ("queue", "vis_queue"); if (!GST_IS_ELEMENT (vis_queue)) return FALSE; g_hash_table_insert (play->priv->elements, "vis_queue", vis_queue); vis_element = gst_element_factory_make ("identity", "vis_element"); if (!GST_IS_ELEMENT (vis_element)) return FALSE; g_hash_table_insert (play->priv->elements, "vis_element", vis_element); end_vis_queue = gst_element_factory_make ("queue", "end_vis_queue"); if (!GST_IS_ELEMENT (end_vis_queue)) return FALSE; g_hash_table_insert (play->priv->elements, "end_vis_queue", end_vis_queue); /* Adding, Linking, Ghosting in visualization */ gst_bin_add_many (GST_BIN (vis_thread), vis_queue, vis_element, end_vis_queue, NULL); gst_element_link_many (vis_queue, vis_element, end_vis_queue, NULL); vis_thread_pad = gst_element_add_ghost_pad (vis_thread, gst_element_get_pad (vis_queue, "sink"), "sink"); g_hash_table_insert (play->priv->elements, "vis_thread_pad", vis_thread_pad); /* Linking, Adding, Ghosting in audio */ gst_element_link_many (audio_queue, audio_volume, audio_tee, NULL); gst_pad_link (audio_tee_pad1, audio_sink_pad); gst_bin_add_many (GST_BIN (audio_thread), audio_queue, audio_volume, audio_tee, vis_thread, audio_sink, NULL); gst_element_add_ghost_pad (audio_thread, gst_element_get_pad (audio_queue, "sink"), "sink"); /* Connecting audio output to autoplugger */ gst_element_link (autoplugger, audio_thread); 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) { GstElement* audio_sink_element; GstClockTime time; 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"); time = gst_element_get_time (audio_sink_element); play->priv->time_nanos = GST_CLOCK_TIME_IS_VALID (time) ? time : 0; 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); } /* =========================================== */ /* */ /* 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); if (!gst_play_pipeline_setup (play)) g_warning ("libgstplay: failed initializing pipeline"); } 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 *switch_colorspace, *audio_thread; 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; switch_colorspace = g_hash_table_lookup (play->priv->elements, "switch_colorspace"); if (!GST_IS_ELEMENT (switch_colorspace)) return FALSE; audio_thread = g_hash_table_lookup (play->priv->elements, "audio_thread"); if (!GST_IS_ELEMENT (audio_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; /* Spider can autoplugg only once. We remove the actual one and put a new autoplugger */ gst_element_unlink (source, autoplugger); gst_element_unlink (autoplugger, switch_colorspace); gst_element_unlink (autoplugger, audio_thread); 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, switch_colorspace); gst_element_link (autoplugger, audio_thread); 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_sink_element, *video_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_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)) { gboolean s = FALSE; s = gst_element_seek (audio_sink_element, GST_FORMAT_TIME | GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, time_nanos); if (!s) { s = gst_element_seek (video_sink_element, GST_FORMAT_TIME | GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, time_nanos); } if (s) { GstClock *clock = gst_bin_get_clock (GST_BIN (play)); play->priv->time_nanos = gst_clock_get_time (clock); 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_sink_element; GstPad *audio_tee_pad1, *audio_sink_pad, *old_audio_sink_pad; 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; old_audio_sink_pad = g_hash_table_lookup (play->priv->elements, "audio_sink_pad"); if (!GST_IS_PAD (old_audio_sink_pad)) return FALSE; audio_thread = g_hash_table_lookup (play->priv->elements, "audio_thread"); if (!GST_IS_ELEMENT (audio_thread)) return FALSE; audio_tee_pad1 = g_hash_table_lookup (play->priv->elements, "audio_tee_pad1"); if (!GST_IS_PAD (audio_tee_pad1)) return FALSE; audio_sink_pad = gst_element_get_pad (audio_sink, "sink"); if (!GST_IS_PAD (audio_sink_pad)) return FALSE; /* Unlinking old audiosink, removing it from pipeline, putting the new one and linking it */ gst_pad_unlink (audio_tee_pad1, old_audio_sink_pad); gst_bin_remove (GST_BIN (audio_thread), old_audio_sink); gst_bin_add (GST_BIN (audio_thread), audio_sink); gst_pad_link (audio_tee_pad1, audio_sink_pad); g_hash_table_replace (play->priv->elements, "audio_sink", audio_sink); g_hash_table_replace (play->priv->elements, "audio_sink_pad", audio_sink_pad); 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 *old_vis_element, *vis_thread, *vis_queue, *end_vis_queue; 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); /* We bring back the pipeline to READY */ if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) { gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED); was_playing = TRUE; } /* Getting needed objects */ vis_thread = g_hash_table_lookup (play->priv->elements, "vis_thread"); if (!GST_IS_ELEMENT (vis_thread)) return FALSE; old_vis_element = g_hash_table_lookup (play->priv->elements, "vis_element"); if (!GST_IS_ELEMENT (old_vis_element)) return FALSE; vis_queue = g_hash_table_lookup (play->priv->elements, "vis_queue"); if (!GST_IS_ELEMENT (vis_queue)) return FALSE; end_vis_queue = g_hash_table_lookup (play->priv->elements, "end_vis_queue"); if (!GST_IS_ELEMENT (end_vis_queue)) return FALSE; /* Unlinking, removing the old element then adding and linking the new one */ gst_element_unlink (vis_queue, old_vis_element); gst_element_unlink (old_vis_element, end_vis_queue); gst_bin_remove (GST_BIN (vis_thread), old_vis_element); gst_bin_add (GST_BIN (vis_thread), vis_element); gst_element_link (vis_queue, vis_element); gst_element_link (vis_element, end_vis_queue); 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) { GstPad *audio_tee_pad2, *vis_thread_pad; gboolean connected = FALSE, was_playing = FALSE; g_return_val_if_fail (play != NULL, FALSE); g_return_val_if_fail (GST_IS_PLAY (play), FALSE); vis_thread_pad = g_hash_table_lookup (play->priv->elements, "vis_thread_pad"); if (!GST_IS_PAD (vis_thread_pad)) return FALSE; audio_tee_pad2 = g_hash_table_lookup (play->priv->elements, "audio_tee_pad2"); if (!GST_IS_PAD (audio_tee_pad2)) return FALSE; if (GST_STATE (GST_ELEMENT (play)) == GST_STATE_PLAYING) { gst_element_set_state (GST_ELEMENT (play), GST_STATE_PAUSED); was_playing = TRUE; } if (gst_pad_get_peer (vis_thread_pad) != NULL) connected = TRUE; else connected = FALSE; if ((connect) && (!connected)) gst_pad_link (audio_tee_pad2, vis_thread_pad); else if ((!connect) && (connected)) gst_pad_unlink (audio_tee_pad2, vis_thread_pad); 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 (void) { GstPlay *play = g_object_new (GST_TYPE_PLAY, NULL); 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; }