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/*
* this library handles interaction with GConf
*/
#include "gconf.h"
#define GST_GCONF_DIR "/system/gstreamer"
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;
}
/* go through a bin, finding the one pad that is unconnected in the given
* * direction, and return that pad */
static GstPad *
gst_bin_find_unconnected_pad (GstBin *bin, GstPadDirection direction)
{
GstPad *pad = NULL;
GList *elements = NULL;
const GList *pads = NULL;
GstElement *element = NULL;
elements = (GList *) gst_bin_get_list (bin);
/* traverse all elements looking for unconnected pads */
while (elements && pad == NULL)
{
element = GST_ELEMENT (elements->data);
pads = gst_element_get_pad_list (element);
while (pads)
{
/* check if the direction matches */
if (GST_PAD_DIRECTION (GST_PAD (pads->data)) == direction)
{
if (GST_PAD_PEER (GST_PAD (pads->data)) == NULL)
{
/* found it ! */
pad = GST_PAD (pads->data);
}
}
if (pad) break; /* found one already */
pads = g_list_next (pads);
}
elements = g_list_next (elements);
}
return pad;
}
/* external functions */
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 (value)
return value;
else
return NULL;
// this is a good idea: return g_strdup (default_val);
}
void
gst_gconf_set_string (const gchar *key, const gchar *value)
{
gconf_client_set_string (gst_gconf_get_client (), key, value, NULL);
}
/* this function renders the given description to a bin,
* and ghosts at most one unconnected src pad and one unconnected sink pad */
GstElement *
gst_gconf_render_bin_from_description (const gchar *description)
{
GstElement *bin = NULL;
GstPad *pad = NULL;
GError *error = NULL;
gchar *desc = NULL;
/* parse the pipeline to a bin */
desc = g_strdup_printf ("bin.( %s )", description);
bin = GST_ELEMENT (gst_parse_launch (desc, &error));
g_free (desc);
if (error)
{
g_print ("DEBUG: gstgconf: error parsing pipeline %s\n%s\n",
description, error->message);
g_error_free (error);
return NULL;
}
/* find pads and ghost them if necessary */
if ((pad = gst_bin_find_unconnected_pad (GST_BIN (bin), GST_PAD_SRC))){
gst_element_add_ghost_pad (bin, pad, "src");
}
if ((pad = gst_bin_find_unconnected_pad (GST_BIN (bin), GST_PAD_SINK))){
gst_element_add_ghost_pad (bin, pad, "sink");
}
return bin;
}
/* this function reads the gconf key, parses the pipeline bit to a bin,
* and ghosts at most one unconnected src pad and one unconnected sink pad */
GstElement *
gst_gconf_render_bin_from_key (const gchar *key)
{
GstElement *bin = NULL;
gchar *value;
value = gst_gconf_get_string (key);
if (value)
bin = gst_gconf_render_bin_from_description (value);
return bin;
}
/*
guint gst_gconf_notify_add (const gchar *key,
GConfClientNotifyFunc func,
gpointer user_data);
*/
GstElement *
gst_gconf_get_default_audio_sink (void)
{
GstElement *ret = gst_gconf_render_bin_from_key ("default/audiosink");
if (!ret) {
ret = gst_element_factory_make ("osssink", NULL);
if (!ret)
g_warning ("No GConf default audio sink key and osssink doesn't work");
else
g_warning ("GConf audio sink not found, using osssink");
}
return ret;
}
GstElement *
gst_gconf_get_default_video_sink (void)
{
GstElement *ret = gst_gconf_render_bin_from_key ("default/videosink");
if (!ret) {
ret = gst_element_factory_make ("xvideosink", NULL);
if (!ret)
g_warning ("No GConf default video sink key and xvideosink doesn't work");
else
g_warning ("GConf video sink not found, using xvideosink");
}
return ret;
}
GstElement *
gst_gconf_get_default_audio_src (void)
{
GstElement *ret = gst_gconf_render_bin_from_key ("default/audiosrc");
if (!ret) {
ret = gst_element_factory_make ("osssrc", NULL);
if (!ret)
g_warning ("No GConf default audio src key and osssrc doesn't work");
else
g_warning ("GConf audio src not found, using osssrc");
}
return ret;
}
GstElement *
gst_gconf_get_default_video_src (void)
{
GstElement *ret = gst_gconf_render_bin_from_key ("default/videosrc");
if (!ret) {
ret = gst_element_factory_make ("videotestsrc", NULL);
if (!ret)
g_warning ("No GConf default video src key and videotestrc doesn't work");
else
g_warning ("GConf video src not found, using videotestrc");
}
return ret;
}
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
gst_plugin_set_longname (plugin,
"Convenience routines for GConf interaction");
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"gstgconf",
plugin_init
};
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