mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-24 18:51:11 +00:00
c47dc4d853
Original commit message from CVS: First THREADED backport attempt, focusing on adding locks and making sure the API is threadsafe. Needs more work. More docs follow this week.
99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wim.taymans@chello.be>
|
|
* 2005 Wim Taymans <wim@fluendo.com>
|
|
*
|
|
* gstquery.h: GstQuery API declaration
|
|
*
|
|
* 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_QUERY_H__
|
|
#define __GST_QUERY_H__
|
|
|
|
#include <glib.h>
|
|
|
|
#include <gst/gstiterator.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef enum {
|
|
GST_QUERY_NONE = 0,
|
|
GST_QUERY_TOTAL,
|
|
GST_QUERY_POSITION,
|
|
GST_QUERY_LATENCY,
|
|
GST_QUERY_JITTER,
|
|
GST_QUERY_START,
|
|
GST_QUERY_SEGMENT_END,
|
|
GST_QUERY_RATE
|
|
} GstQueryType;
|
|
|
|
/* rate is relative to 1000000 */
|
|
#define GST_QUERY_TYPE_RATE_DEN G_GINT64_CONSTANT (1000000)
|
|
|
|
typedef struct _GstQueryTypeDefinition GstQueryTypeDefinition;
|
|
|
|
struct _GstQueryTypeDefinition
|
|
{
|
|
GstQueryType value;
|
|
gchar *nick;
|
|
gchar *description;
|
|
};
|
|
|
|
#ifdef G_HAVE_ISO_VARARGS
|
|
#define GST_QUERY_TYPE_FUNCTION(type, functionname, ...) \
|
|
static const GstQueryType* \
|
|
functionname (type object) \
|
|
{ \
|
|
static const GstQueryType types[] = { \
|
|
__VA_ARGS__, \
|
|
0 \
|
|
}; \
|
|
return types; \
|
|
}
|
|
#elif defined(G_HAVE_GNUC_VARARGS)
|
|
#define GST_QUERY_TYPE_FUNCTION(type, functionname, a...) \
|
|
static const GstQueryType* \
|
|
functionname (type object) \
|
|
{ \
|
|
static const GstQueryType types[] = { \
|
|
a, \
|
|
0 \
|
|
}; \
|
|
return types; \
|
|
}
|
|
#endif
|
|
|
|
void _gst_query_type_initialize (void);
|
|
|
|
/* register a new query */
|
|
GstQueryType gst_query_type_register (const gchar *nick,
|
|
const gchar *description);
|
|
GstQueryType gst_query_type_get_by_nick (const gchar *nick);
|
|
|
|
/* check if a query is in an array of querys */
|
|
gboolean gst_query_types_contains (const GstQueryType *types, GstQueryType type);
|
|
|
|
/* query for query details */
|
|
G_CONST_RETURN GstQueryTypeDefinition*
|
|
gst_query_type_get_details (GstQueryType type);
|
|
GstIterator* gst_query_type_iterate_definitions (void);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_QUERY_H__ */
|
|
|