gstreamer/gst/gstmeta.h

95 lines
2.1 KiB
C
Raw Normal View History

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstmeta.h: Header for metadata subsystem
*
* 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_META_H__
#define __GST_META_H__
#include <glib.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_ATOMIC_H
#include <asm/atomic.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_META(meta) ((GstMeta *)(meta))
#define GST_META_FLAGS(meta) \
(GST_META(meta)->flags)
#define GST_META_FLAG_IS_SET(meta,flag) \
(GST_META_FLAGS(meta) & (flag))
#define GST_META_FLAG_SET(meta,flag) \
G_STMT_START{ (GST_META_FLAGS(meta) |= (flag)); }G_STMT_END
#define GST_META_FLAG_UNSET(meta,flag) \
G_STMT_START{ (GST_META_FLAGS(meta) &= ~(flag)); }G_STMT_END
typedef enum {
GST_META_FREEABLE = 1 << 0,
} GstMetaFlags;
typedef struct _GstMeta GstMeta;
struct _GstMeta {
/* locking */
GMutex *lock;
/* refcounting */
#ifdef HAVE_ATOMIC_H
atomic_t refcount;
#else
int refcount;
#endif
guint16 type;
guint16 flags;
void *data;
guint16 size;
};
GstMeta* gst_meta_new_size (gint size);
#define gst_meta_new(type) (type *)gst_meta_new_size(sizeof(type))
/* refcounting */
void gst_meta_ref (GstMeta *meta);
void gst_meta_unref (GstMeta *meta);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_BUFFER_H__ */