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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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179 lines
4.7 KiB
C
179 lines
4.7 KiB
C
/* GStreamer
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*
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* Copyright (C) 2014-2015 Sebastian Dröge <sebastian@centricular.com>
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* Copyright (C) 2015 Brijesh Singh <brijesh.ksingh@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstplayer-visualization
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* @title: GstPlayerVisualization
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* @short_description: Player Visualization
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstplayer-visualization.h"
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#include <string.h>
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static GMutex vis_lock;
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static GQueue vis_list = G_QUEUE_INIT;
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static guint32 vis_cookie;
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G_DEFINE_BOXED_TYPE (GstPlayerVisualization, gst_player_visualization,
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(GBoxedCopyFunc) gst_player_visualization_copy,
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(GBoxedFreeFunc) gst_player_visualization_free);
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/**
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* gst_player_visualization_free:
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* @vis: #GstPlayerVisualization instance
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*
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* Frees a #GstPlayerVisualization.
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*/
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void
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gst_player_visualization_free (GstPlayerVisualization * vis)
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{
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g_return_if_fail (vis != NULL);
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g_free (vis->name);
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g_free (vis->description);
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g_free (vis);
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}
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/**
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* gst_player_visualization_copy:
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* @vis: #GstPlayerVisualization instance
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*
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* Makes a copy of the #GstPlayerVisualization. The result must be
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* freed using gst_player_visualization_free().
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*
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* Returns: (transfer full): an allocated copy of @vis.
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*/
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GstPlayerVisualization *
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gst_player_visualization_copy (const GstPlayerVisualization * vis)
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{
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GstPlayerVisualization *ret;
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g_return_val_if_fail (vis != NULL, NULL);
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ret = g_new0 (GstPlayerVisualization, 1);
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ret->name = vis->name ? g_strdup (vis->name) : NULL;
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ret->description = vis->description ? g_strdup (vis->description) : NULL;
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return ret;
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}
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/**
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* gst_player_visualizations_free:
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* @viss: a %NULL terminated array of #GstPlayerVisualization to free
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*
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* Frees a %NULL terminated array of #GstPlayerVisualization.
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*/
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void
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gst_player_visualizations_free (GstPlayerVisualization ** viss)
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{
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GstPlayerVisualization **p;
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g_return_if_fail (viss != NULL);
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p = viss;
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while (*p) {
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g_free ((*p)->name);
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g_free ((*p)->description);
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g_free (*p);
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p++;
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}
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g_free (viss);
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}
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static void
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gst_player_update_visualization_list (void)
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{
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GList *features;
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GList *l;
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guint32 cookie;
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GstPlayerVisualization *vis;
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g_mutex_lock (&vis_lock);
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/* check if we need to update the list */
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cookie = gst_registry_get_feature_list_cookie (gst_registry_get ());
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if (vis_cookie == cookie) {
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g_mutex_unlock (&vis_lock);
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return;
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}
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/* if update is needed then first free the existing list */
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while ((vis = g_queue_pop_head (&vis_list)))
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gst_player_visualization_free (vis);
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features = gst_registry_get_feature_list (gst_registry_get (),
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GST_TYPE_ELEMENT_FACTORY);
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for (l = features; l; l = l->next) {
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GstPluginFeature *feature = l->data;
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const gchar *klass;
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klass = gst_element_factory_get_metadata (GST_ELEMENT_FACTORY (feature),
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GST_ELEMENT_METADATA_KLASS);
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if (strstr (klass, "Visualization")) {
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vis = g_new0 (GstPlayerVisualization, 1);
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vis->name = g_strdup (gst_plugin_feature_get_name (feature));
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vis->description =
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g_strdup (gst_element_factory_get_metadata (GST_ELEMENT_FACTORY
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(feature), GST_ELEMENT_METADATA_DESCRIPTION));
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g_queue_push_tail (&vis_list, vis);
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}
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}
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gst_plugin_feature_list_free (features);
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vis_cookie = cookie;
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g_mutex_unlock (&vis_lock);
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}
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/**
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* gst_player_visualizations_get:
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*
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* Returns: (transfer full) (array zero-terminated=1) (element-type GstPlayerVisualization):
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* a %NULL terminated array containing all available
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* visualizations. Use gst_player_visualizations_free() after
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* usage.
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*/
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GstPlayerVisualization **
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gst_player_visualizations_get (void)
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{
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gint i = 0;
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GList *l;
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GstPlayerVisualization **ret;
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gst_player_update_visualization_list ();
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g_mutex_lock (&vis_lock);
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ret = g_new0 (GstPlayerVisualization *, g_queue_get_length (&vis_list) + 1);
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for (l = vis_list.head; l; l = l->next)
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ret[i++] = gst_player_visualization_copy (l->data);
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g_mutex_unlock (&vis_lock);
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return ret;
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}
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