gstreamer/gst/autoplug/gstsearchfuncs.h

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/* GStreamer
* Copyright (C) 1999-2002 Erik Walthinsen <omega@cse.ogi.edu>
* 2000-2002 Wim Taymans <wtay@chello.be>
*
* gstsearchfuncs.h: Header for gstsearchfuncs.c
*
* 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.
*/
#ifndef __GST_SEARCHFUNCS_H__
#define __GST_SEARCHFUNCS_H__
#include <gst/gst.h>
/* placeholder for maximum cost when plugging */
#define GST_AUTOPLUG_MAX_COST 999999
/* struct for a node, in the search tree */
typedef struct _GstAutoplugNode GstAutoplugNode;
struct _GstAutoplugNode {
GstAutoplugNode *prev; /* previous node */
GstElementFactory *fac; /* factory of element to connect to */
GstPadTemplate *templ; /* template which can connect */
guint cost; /* total cost to get here */
GstPadTemplate *endpoint; /* pad template that can connect to sink caps */
};
/* helper functions */
GstPadTemplate * gst_autoplug_can_connect_src (GstElementFactory *fac, GstCaps *src);
GstPadTemplate * gst_autoplug_can_connect_sink (GstElementFactory *fac, GstCaps *sink);
GstPadTemplate * gst_autoplug_can_match (GstElementFactory *src, GstElementFactory *dest);
gboolean gst_autoplug_factory_has_direction (GstElementFactory *fac, GstPadDirection dir);
#define gst_autoplug_factory_has_sink(fac) gst_autoplug_factory_has_direction((fac), GST_PAD_SINK)
#define gst_autoplug_factory_has_src(fac) gst_autoplug_factory_has_direction((fac), GST_PAD_SRC)
/* cost functions */
#define gst_autoplug_get_cost(fac) 1
/* factory selections */
GList * gst_autoplug_factories_sinks (GList *factories);
GList * gst_autoplug_factories_srcs (GList *factories);
GList * gst_autoplug_factories_filters (GList *factories);
GList * gst_autoplug_factories_filters_with_sink_caps(GList *factories);
GList * gst_autoplug_factories_at_most_templates(GList *factories, GstPadDirection dir, guint maxtemplates);
/* shortest path algorithm */
GList * gst_autoplug_sp (GstCaps *src_caps, GstCaps *sink_caps, GList *factories);
#endif /* __GST_SEARCHFUNCS_H__ */