mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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245 lines
6.4 KiB
C
245 lines
6.4 KiB
C
/* GStreamer
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* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-gsettingsvideosrc
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*
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* This element outputs sound to the videosrc that has been configured in
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* GSettings by the user.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch gsettingsvideosrc ! ffmpegcolorspace ! videoscale ! autovideosink
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* ]| Play from configured videosrc
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* </refsect2>
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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 <gst/gst.h>
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#include <string.h>
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#include "gstgsettingsvideosrc.h"
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#include "gstgsettings.h"
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GST_BOILERPLATE (GstGSettingsVideoSrc, gst_gsettings_video_src, GstSwitchSrc,
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GST_TYPE_SWITCH_SRC);
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static gboolean
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gst_gsettings_video_src_change_child (GstGSettingsVideoSrc * src)
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{
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gchar *new_string;
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GError *err = NULL;
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GstElement *new_kid;
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GST_OBJECT_LOCK (src);
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new_string =
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g_settings_get_string (src->settings, GST_GSETTINGS_KEY_VIDEOSRC);
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if (new_string != NULL && src->gsettings_str != NULL &&
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(strlen (new_string) == 0 ||
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strcmp (src->gsettings_str, new_string) == 0)) {
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g_free (new_string);
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GST_DEBUG_OBJECT (src,
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"GSettings key was updated, but it didn't change. Ignoring");
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GST_OBJECT_UNLOCK (src);
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return TRUE;
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}
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GST_OBJECT_UNLOCK (src);
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GST_DEBUG_OBJECT (src, "GSettings key changed from '%s' to '%s'",
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GST_STR_NULL (src->gsettings_str), GST_STR_NULL (new_string));
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if (new_string) {
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new_kid = gst_parse_bin_from_description (new_string, TRUE, &err);
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if (err) {
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GST_ERROR_OBJECT (src, "error creating bin '%s': %s", new_string,
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err->message);
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g_error_free (err);
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}
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} else {
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new_kid = NULL;
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}
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if (new_kid == NULL) {
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GST_ELEMENT_ERROR (src, LIBRARY, SETTINGS, (NULL),
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("Failed to render video src from GSettings"));
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goto fail;
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}
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if (!gst_switch_src_set_child (GST_SWITCH_SRC (src), new_kid)) {
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GST_WARNING_OBJECT (src, "Failed to update child element");
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goto fail;
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}
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g_free (src->gsettings_str);
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src->gsettings_str = new_string;
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return TRUE;
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fail:
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g_free (new_string);
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return FALSE;
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}
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static void
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on_changed (GSettings * settings, gchar * key, GstGSettingsVideoSrc * src)
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{
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if (!g_str_equal (key, "videosrc"));
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return;
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gst_gsettings_video_src_change_child (src);
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}
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static gboolean
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gst_gsettings_video_src_start (GstGSettingsVideoSrc * src)
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{
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GError *err = NULL;
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GThread *thread;
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src->loop = g_main_loop_new (src->context, FALSE);
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thread =
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g_thread_create ((GThreadFunc) g_main_loop_run, src->loop, FALSE, &err);
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if (!thread) {
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GST_ELEMENT_ERROR (src, CORE, STATE_CHANGE, (NULL),
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("Failed to create new thread: %s", err->message));
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g_error_free (err);
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g_main_loop_unref (src->loop);
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src->loop = NULL;
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return FALSE;
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}
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g_main_context_push_thread_default (src->context);
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src->settings = g_settings_new (GST_GSETTINGS_SCHEMA);
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src->changed_id =
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g_signal_connect_data (G_OBJECT (src->settings), "changed",
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G_CALLBACK (on_changed), gst_object_ref (src),
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(GClosureNotify) gst_object_unref, 0);
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g_main_context_pop_thread_default (src->context);
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return TRUE;
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}
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static gboolean
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gst_gsettings_video_src_reset (GstGSettingsVideoSrc * src)
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{
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gst_switch_src_set_child (GST_SWITCH_SRC (src), NULL);
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if (src->changed_id) {
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g_signal_handler_disconnect (src->settings, src->changed_id);
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src->changed_id = 0;
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}
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if (src->loop) {
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g_main_loop_quit (src->loop);
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g_main_loop_unref (src->loop);
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src->loop = NULL;
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}
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if (src->settings) {
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g_object_unref (src->settings);
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src->settings = NULL;
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}
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GST_OBJECT_LOCK (src);
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g_free (src->gsettings_str);
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src->gsettings_str = NULL;
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GST_OBJECT_UNLOCK (src);
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return TRUE;
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}
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static void
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gst_gsettings_video_src_finalize (GObject * object)
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{
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GstGSettingsVideoSrc *src = GST_GSETTINGS_VIDEO_SRC (object);
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g_free (src->gsettings_str);
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g_main_context_unref (src->context);
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GST_CALL_PARENT (G_OBJECT_CLASS, finalize, ((GObject *) (src)));
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}
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static GstStateChangeReturn
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gst_gsettings_video_src_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GstGSettingsVideoSrc *src = GST_GSETTINGS_VIDEO_SRC (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!gst_gsettings_video_src_start (src))
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return GST_STATE_CHANGE_FAILURE;
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if (!gst_gsettings_video_src_change_child (src)) {
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gst_gsettings_video_src_reset (src);
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return GST_STATE_CHANGE_FAILURE;
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}
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break;
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default:
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break;
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}
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ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
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(element, transition), GST_STATE_CHANGE_SUCCESS);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:
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gst_gsettings_video_src_reset (src);
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break;
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default:
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break;
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}
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return ret;
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}
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static void
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gst_gsettings_video_src_init (GstGSettingsVideoSrc * src,
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GstGSettingsVideoSrcClass * g_class)
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{
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src->context = g_main_context_new ();
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gst_gsettings_video_src_reset (src);
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}
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static void
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gst_gsettings_video_src_base_init (gpointer klass)
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{
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GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
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gst_element_class_set_details_simple (eklass, "GSettings video src",
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"Src/Video",
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"Video src embedding the GSettings preferences for video input",
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"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
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}
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static void
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gst_gsettings_video_src_class_init (GstGSettingsVideoSrcClass * klass)
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{
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GObjectClass *oklass = G_OBJECT_CLASS (klass);
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GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
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oklass->finalize = gst_gsettings_video_src_finalize;
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eklass->change_state = gst_gsettings_video_src_change_state;
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}
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