Commit f6c10c59 authored by Thomas Vander Stichele's avatar Thomas Vander Stichele
Browse files

api changes and render/ghost functions

Original commit message from CVS:
api changes and render/ghost functions
parent 0333cbe9
librarydir = $(prefix)/lib/gst
librarydir = $(prefix)/lib
library_LTLIBRARIES = libgstgconf.la
......
......@@ -19,6 +19,44 @@ gst_gconf_get_client (void)
return _gst_gconf_client;
}
/* go through a bin, finding the one pad that is unconnected in the given
* * direction, and return that pad */
GstPad *
gst_bin_find_unconnected_pad (GstBin *bin, GstPadDirection direction)
{
GstPad *pad = NULL;
GList *elements = NULL;
GList *pads = NULL;
GstElement *element = NULL;
g_print ("DEBUG: find_unconnected start\n");
elements = (GList *) gst_bin_get_list (bin);
/* traverse all elements looking for unconnected pads */
while (elements && pad == NULL)
{
element = GST_ELEMENT (elements->data);
g_print ("DEBUG: looking in element %s\n", gst_element_get_name (element));
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 ! */
g_print ("DEBUG: found an unconnected pad !\n");
pad = GST_PAD (pads->data);
}
}
if (pad) break; /* found one already */
pads = g_list_next (pads);
}
elements = g_list_next (elements);
}
g_print ("DEBUG: find_unconnected stop\n");
return pad;
}
/* external functions */
......@@ -47,27 +85,47 @@ gst_gconf_set_string (const gchar *key, const gchar *value)
gconf_client_set_string (gst_gconf_get_client (), key, value, NULL);
}
gboolean
gst_gconf_render_bin (const gchar *key, GstElement **element)
/* 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;
gchar *pipeline;
GstElement *bin = NULL;
GstPad *pad = NULL;
GError *error = NULL;
gchar *value = NULL;
value = gst_gconf_get_string (key);
pipeline = g_strdup_printf ("bin.( %s )", value);
bin = GST_ELEMENT (gst_parse_launch (pipeline, &error));
/* parse the pipeline */
bin = GST_ELEMENT (gst_parse_launch (description, &error));
if (error)
{
g_print ("DEBUG: gstgconf: error parsing pipeline %s\n%s\n",
pipeline, error->message);
description, error->message);
g_error_free (error);
return FALSE;
return NULL;
}
*element = bin;
return TRUE;
/* 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;
gchar *description;
gchar *value = NULL;
value = gst_gconf_get_string (key);
description = g_strdup_printf ("bin.( %s )", value);
bin = gst_gconf_render_bin_from_description (description);
g_free (description);
return bin;
}
/*
......
......@@ -12,8 +12,8 @@ gchar * gst_gconf_get_string (const gchar *key);
void gst_gconf_set_string (const gchar *key,
const gchar *value);
gboolean gst_gconf_render_bin (const gchar *key,
GstElement **element);
GstElement * gst_gconf_render_bin_from_key (const gchar *key);
GstElement * gst_gconf_render_bin_from_description (const gchar *description);
/*
guint gst_gconf_notify_add (const gchar *key,
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment