2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
5 * gstquery.h: GstQuery API declaration
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 #ifndef __GST_QUERY_H__
25 #define __GST_QUERY_H__
29 G_BEGIN_DECLS typedef enum
37 GST_QUERY_SEGMENT_END,
41 /* rate is relative to 1000000 */
42 #define GST_QUERY_TYPE_RATE_DEN G_GINT64_CONSTANT (1000000)
44 typedef struct _GstQueryTypeDefinition GstQueryTypeDefinition;
46 struct _GstQueryTypeDefinition
53 #ifdef G_HAVE_ISO_VARARGS
54 #define GST_QUERY_TYPE_FUNCTION(type, functionname, ...) \
55 static const GstQueryType* \
56 functionname (type object) \
58 static const GstQueryType types[] = { \
64 #elif defined(G_HAVE_GNUC_VARARGS)
65 #define GST_QUERY_TYPE_FUNCTION(type, functionname, a...) \
66 static const GstQueryType* \
67 functionname (type object) \
69 static const GstQueryType types[] = { \
77 void _gst_query_type_initialize (void);
79 /* register a new query */
80 GstQueryType gst_query_type_register (const gchar * nick,
81 const gchar * description);
82 GstQueryType gst_query_type_get_by_nick (const gchar * nick);
84 /* check if a query is in an array of querys */
85 gboolean gst_query_types_contains (const GstQueryType * types,
88 /* query for query details */
89 G_CONST_RETURN GstQueryTypeDefinition *gst_query_type_get_details (GstQueryType
91 G_CONST_RETURN GList *gst_query_type_get_definitions (void);
94 #endif /* __GST_QUERY_H__ */