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/* GStreamer
* Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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.
*/
/**
* SECTION:element-gsettingsaudiosrc
*
* This element outputs sound to the audiosrc that has been configured in
* GSettings by the user.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch gsettingsaudiosrc ! audioconvert ! audioresample ! autoaudiosink
* ]| Play from configured audiosrc
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gst/gst.h>
#include <string.h>
#include "gstgsettingsaudiosrc.h"
#include "gstgsettings.h"
GST_BOILERPLATE (GstGSettingsAudioSrc, gst_gsettings_audio_src, GstSwitchSrc,
GST_TYPE_SWITCH_SRC);
static gboolean
gst_gsettings_audio_src_change_child (GstGSettingsAudioSrc * src)
{
gchar *new_string;
GError *err = NULL;
GstElement *new_kid;
GST_OBJECT_LOCK (src);
new_string =
g_settings_get_string (src->settings, GST_GSETTINGS_KEY_AUDIOSRC);
if (new_string != NULL && src->gsettings_str != NULL &&
(strlen (new_string) == 0 ||
strcmp (src->gsettings_str, new_string) == 0)) {
g_free (new_string);
GST_DEBUG_OBJECT (src,
"GSettings key was updated, but it didn't change. Ignoring");
GST_OBJECT_UNLOCK (src);
return TRUE;
}
GST_OBJECT_UNLOCK (src);
GST_DEBUG_OBJECT (src, "GSettings key changed from '%s' to '%s'",
GST_STR_NULL (src->gsettings_str), GST_STR_NULL (new_string));
if (new_string) {
new_kid = gst_parse_bin_from_description (new_string, TRUE, &err);
if (err) {
GST_ERROR_OBJECT (src, "error creating bin '%s': %s", new_string,
err->message);
g_error_free (err);
}
} else {
new_kid = NULL;
}
if (new_kid == NULL) {
GST_ELEMENT_ERROR (src, LIBRARY, SETTINGS, (NULL),
("Failed to render audio src from GSettings"));
goto fail;
}
if (!gst_switch_src_set_child (GST_SWITCH_SRC (src), new_kid)) {
GST_WARNING_OBJECT (src, "Failed to update child element");
goto fail;
}
g_free (src->gsettings_str);
src->gsettings_str = new_string;
return TRUE;
fail:
g_free (new_string);
return FALSE;
}
static void
on_changed (GSettings * settings, gchar * key, GstGSettingsAudioSrc * src)
{
if (!g_str_equal (key, "audiosrc"));
return;
gst_gsettings_audio_src_change_child (src);
}
static gboolean
gst_gsettings_audio_src_start (GstGSettingsAudioSrc * src)
{
GError *err = NULL;
GThread *thread;
src->loop = g_main_loop_new (src->context, FALSE);
thread =
g_thread_create ((GThreadFunc) g_main_loop_run, src->loop, FALSE, &err);
if (!thread) {
GST_ELEMENT_ERROR (src, CORE, STATE_CHANGE, (NULL),
("Failed to create new thread: %s", err->message));
g_error_free (err);
g_main_loop_unref (src->loop);
src->loop = NULL;
return FALSE;
}
g_main_context_push_thread_default (src->context);
src->settings = g_settings_new (GST_GSETTINGS_SCHEMA);
src->changed_id =
g_signal_connect_data (G_OBJECT (src->settings), "changed",
G_CALLBACK (on_changed), gst_object_ref (src),
(GClosureNotify) gst_object_unref, 0);
g_main_context_pop_thread_default (src->context);
return TRUE;
}
static gboolean
gst_gsettings_audio_src_reset (GstGSettingsAudioSrc * src)
{
gst_switch_src_set_child (GST_SWITCH_SRC (src), NULL);
if (src->changed_id) {
g_signal_handler_disconnect (src->settings, src->changed_id);
src->changed_id = 0;
}
if (src->loop) {
g_main_loop_quit (src->loop);
g_main_loop_unref (src->loop);
src->loop = NULL;
}
if (src->settings) {
g_object_unref (src->settings);
src->settings = NULL;
}
GST_OBJECT_LOCK (src);
g_free (src->gsettings_str);
src->gsettings_str = NULL;
GST_OBJECT_UNLOCK (src);
return TRUE;
}
static void
gst_gsettings_audio_src_finalize (GObject * object)
{
GstGSettingsAudioSrc *src = GST_GSETTINGS_AUDIO_SRC (object);
g_free (src->gsettings_str);
g_main_context_unref (src->context);
GST_CALL_PARENT (G_OBJECT_CLASS, finalize, ((GObject *) (src)));
}
static GstStateChangeReturn
gst_gsettings_audio_src_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstGSettingsAudioSrc *src = GST_GSETTINGS_AUDIO_SRC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_gsettings_audio_src_start (src))
return GST_STATE_CHANGE_FAILURE;
if (!gst_gsettings_audio_src_change_child (src)) {
gst_gsettings_audio_src_reset (src);
return GST_STATE_CHANGE_FAILURE;
}
break;
default:
break;
}
ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
(element, transition), GST_STATE_CHANGE_SUCCESS);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_gsettings_audio_src_reset (src);
break;
default:
break;
}
return ret;
}
static void
gst_gsettings_audio_src_init (GstGSettingsAudioSrc * src,
GstGSettingsAudioSrcClass * g_class)
{
src->context = g_main_context_new ();
gst_gsettings_audio_src_reset (src);
}
static void
gst_gsettings_audio_src_base_init (gpointer klass)
{
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details_simple (eklass, "GSettings audio src",
"Src/Audio",
"Audio src embedding the GSettings preferences for audio input",
"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
}
static void
gst_gsettings_audio_src_class_init (GstGSettingsAudioSrcClass * klass)
{
GObjectClass *oklass = G_OBJECT_CLASS (klass);
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
oklass->finalize = gst_gsettings_audio_src_finalize;
eklass->change_state = gst_gsettings_audio_src_change_state;
}
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