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64 lines
2.9 KiB
C
64 lines
2.9 KiB
C
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/* GStreamer
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* Copyright (C) 1999-2002 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000-2002 Wim Taymans <wtay@chello.be>
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*
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* gstsearchfuncs.h: Header for gstsearchfuncs.c
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_SEARCHFUNCS_H__
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#define __GST_SEARCHFUNCS_H__
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#include <gst/gst.h>
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/* placeholder for maximum cost when plugging */
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#define GST_AUTOPLUG_MAX_COST 999999
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/* struct for a node, in the search tree */
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typedef struct _GstAutoplugNode GstAutoplugNode;
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struct _GstAutoplugNode {
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GstAutoplugNode *prev; /* previous node */
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GstElementFactory *fac; /* factory of element to connect to */
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GstPadTemplate *templ; /* template which can connect */
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guint cost; /* total cost to get here */
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GstPadTemplate *endpoint; /* pad template that can connect to sink caps */
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};
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/* helper functions */
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GstPadTemplate * gst_autoplug_can_connect_src (GstElementFactory *fac, GstCaps *src);
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GstPadTemplate * gst_autoplug_can_connect_sink (GstElementFactory *fac, GstCaps *sink);
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GstPadTemplate * gst_autoplug_can_match (GstElementFactory *src, GstElementFactory *dest);
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gboolean gst_autoplug_factory_has_direction (GstElementFactory *fac, GstPadDirection dir);
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#define gst_autoplug_factory_has_sink(fac) gst_autoplug_factory_has_direction((fac), GST_PAD_SINK)
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#define gst_autoplug_factory_has_src(fac) gst_autoplug_factory_has_direction((fac), GST_PAD_SRC)
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/* cost functions */
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#define gst_autoplug_get_cost(fac) 1
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/* factory selections */
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GList * gst_autoplug_factories_sinks (GList *factories);
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GList * gst_autoplug_factories_srcs (GList *factories);
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GList * gst_autoplug_factories_filters (GList *factories);
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GList * gst_autoplug_factories_filters_with_sink_caps(GList *factories);
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GList * gst_autoplug_factories_at_most_templates(GList *factories, GstPadDirection dir, guint maxtemplates);
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/* shortest path algorithm */
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GList * gst_autoplug_sp (GstCaps *src_caps, GstCaps *sink_caps, GList *factories);
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#endif /* __GST_SEARCHFUNCS_H__ */
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