gstreamer/ext/gconf/gconf.c

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/* GStreamer
* Copyright (C) <2002> Thomas Vander Stichele <thomas@apestaart.org>
*
* 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.
*/
/*
* this library handles interaction with GConf
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gconf.h"
#ifndef GST_GCONF_DIR
#error "GST_GCONF_DIR is not defined !"
#endif
static GConfClient *_gst_gconf_client = NULL; /* GConf connection */
/* internal functions */
static GConfClient *
gst_gconf_get_client (void)
{
if (!_gst_gconf_client)
_gst_gconf_client = gconf_client_get_default ();
return _gst_gconf_client;
}
/* external functions */
/**
* gst_gconf_get_string:
* @key: a #gchar corresponding to the key you want to get.
*
* Get GConf key @key's string value.
*
* Returns: a newly allocated #gchar string containing @key's value,
* or NULL in the case of an error..
*/
gchar *
gst_gconf_get_string (const gchar * key)
{
GError *error = NULL;
gchar *value = NULL;
gchar *full_key = g_strdup_printf ("%s/%s", GST_GCONF_DIR, key);
value = gconf_client_get_string (gst_gconf_get_client (), full_key, &error);
g_free (full_key);
if (error) {
g_warning ("gst_gconf_get_string: error: %s\n", error->message);
g_error_free (error);
return NULL;
}
return value;
}
/**
* gst_gconf_set_string:
* @key: a #gchar corresponding to the key you want to set.
* @value: a #gchar containing key value.
*
* Set GConf key @key to string value @value.
*/
void
gst_gconf_set_string (const gchar * key, const gchar * value)
{
GError *error = NULL;
gchar *full_key = g_strdup_printf ("%s/%s", GST_GCONF_DIR, key);
gconf_client_set_string (gst_gconf_get_client (), full_key, value, &error);
if (error) {
GST_ERROR ("gst_gconf_set_string: error: %s\n", error->message);
g_error_free (error);
}
g_free (full_key);
}
/**
* gst_gconf_render_bin_from_key:
* @key: a #gchar string corresponding to a GConf key.
*
* Render bin from GConf key @key.
*
* Returns: a #GstElement containing the rendered bin.
*/
GstElement *
gst_gconf_render_bin_from_key (const gchar * key)
{
GstElement *bin = NULL;
gchar *value;
value = gst_gconf_get_string (key);
if (value) {
GError *err = NULL;
bin = gst_parse_bin_from_description (value, TRUE, &err);
if (err) {
GST_ERROR ("gconf: error creating bin '%s': %s", value, err->message);
g_error_free (err);
}
g_free (value);
}
return bin;
}
/**
* gst_gconf_get_default_audio_sink:
*
* Render audio output bin from GStreamer GConf key : "default/audiosink".
* If key is invalid, the default audio sink for the platform is used
* (typically osssink or sunaudiosink).
*
* Returns: a #GstElement containing the audio output bin, or NULL if
* everything failed.
*/
GstElement *
gst_gconf_get_default_audio_sink (void)
{
GstElement *ret = gst_gconf_render_bin_from_key (GST_GCONF_AUDIOSINK_KEY);
if (!ret) {
ret = gst_element_factory_make (DEFAULT_AUDIOSINK, NULL);
if (!ret)
g_warning ("No GConf default audio sink key and %s doesn't work",
DEFAULT_AUDIOSINK);
}
return ret;
}
/**
* gst_gconf_get_default_video_sink:
*
* Render video output bin from GStreamer GConf key : "default/videosink".
* If key is invalid, the default video sink for the platform is used
* (typically xvimagesink or ximagesink).
*
* Returns: a #GstElement containing the video output bin, or NULL if
* everything failed.
*/
GstElement *
gst_gconf_get_default_video_sink (void)
{
GstElement *ret = gst_gconf_render_bin_from_key (GST_GCONF_VIDEOSINK_KEY);
if (!ret) {
ret = gst_element_factory_make (DEFAULT_VIDEOSINK, NULL);
if (!ret)
g_warning ("No GConf default video sink key and %s doesn't work",
DEFAULT_VIDEOSINK);
}
return ret;
}
/**
* gst_gconf_get_default_audio_src:
*
* Render audio acquisition bin from GStreamer GConf key : "default/audiosrc".
* If key is invalid, the default audio source for the plaform is used.
* (typically osssrc or sunaudiosrc).
*
* Returns: a #GstElement containing the audio source bin, or NULL if
* everything failed.
*/
GstElement *
gst_gconf_get_default_audio_src (void)
{
GstElement *ret = gst_gconf_render_bin_from_key (GST_GCONF_AUDIOSRC_KEY);
if (!ret) {
ret = gst_element_factory_make (DEFAULT_AUDIOSRC, NULL);
if (!ret)
g_warning ("No GConf default audio src key and %s doesn't work",
DEFAULT_AUDIOSRC);
}
return ret;
}
/**
* gst_gconf_get_default_video_src:
*
* Render video acquisition bin from GStreamer GConf key :
* "default/videosrc". If key is invalid, the default video source
* for the platform is used (typically videotestsrc).
*
* Returns: a #GstElement containing the video source bin, or NULL if
* everything failed.
*/
GstElement *
gst_gconf_get_default_video_src (void)
{
GstElement *ret = gst_gconf_render_bin_from_key (GST_GCONF_VIDEOSRC_KEY);
if (!ret) {
ret = gst_element_factory_make (DEFAULT_VIDEOSRC, NULL);
if (!ret)
g_warning ("No GConf default video src key and %s doesn't work",
DEFAULT_VIDEOSRC);
}
return ret;
}
/**
* gst_gconf_get_default_visualization_element:
*
* Render visualization bin from GStreamer GConf key : "default/visualization".
* If key is invalid, the default visualization element is used.
*
* Returns: a #GstElement containing the visualization bin, or NULL if
* everything failed.
*/
GstElement *
gst_gconf_get_default_visualization_element (void)
{
GstElement *ret = gst_gconf_render_bin_from_key ("default/visualization");
if (!ret) {
ret = gst_element_factory_make (DEFAULT_VISUALIZER, NULL);
if (!ret)
g_warning
("No GConf default visualization plugin key and %s doesn't work",
DEFAULT_VISUALIZER);
}
return ret;
}