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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstbuffer.h: Header for GstBuffer object
*
* 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_BUFFER_H__
#define __GST_BUFFER_H__
#include <gst/gstobject.h>
#include <gst/gstmeta.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_BUFFER(buf) \
((GstBuffer *)(buf))
#define GST_BUFFER_FLAGS(buf) \
(GST_BUFFER(buf)->flags)
#define GST_BUFFER_FLAG_IS_SET(buf,flag) \
(GST_BUFFER_FLAGS(buf) & (1<<(flag)))
#define GST_BUFFER_FLAG_SET(buf,flag) \
G_STMT_START{ (GST_BUFFER_FLAGS(buf) |= (1<<(flag))); }G_STMT_END
#define GST_BUFFER_FLAG_UNSET(buf,flag) \
G_STMT_START{ (GST_BUFFER_FLAGS(buf) &= ~(1<<(flag))); }G_STMT_END
#define GST_BUFFER_TYPE(buf) (GST_BUFFER(buf)->type)
#define GST_BUFFER_DATA(buf) (GST_BUFFER(buf)->data)
#define GST_BUFFER_SIZE(buf) (GST_BUFFER(buf)->size)
#define GST_BUFFER_OFFSET(buf) (GST_BUFFER(buf)->offset)
#define GST_BUFFER_MAXSIZE(buf) (GST_BUFFER(buf)->maxsize)
#define GST_BUFFER_TIMESTAMP(buf) (GST_BUFFER(buf)->timestamp)
#define GST_BUFFER_LOCK(buf) (g_mutex_lock(GST_BUFFER(buf)->lock))
#define GST_BUFFER_TRYLOCK(buf) (g_mutex_trylock(GST_BUFFER(buf)->lock))
#define GST_BUFFER_UNLOCK(buf) (g_mutex_unlock(GST_BUFFER(buf)->lock))
typedef enum {
GST_BUFFER_READONLY,
GST_BUFFER_ORIGINAL,
GST_BUFFER_DONTFREE,
GST_BUFFER_FLUSH,
GST_BUFFER_EOS,
GST_BUFFER_DISCONTINUOUS,
} GstBufferFlags;
typedef struct _GstBuffer GstBuffer;
#include <gst/gstbufferpool.h>
struct _GstBuffer {
/* locking */
GMutex *lock;
/* refcounting */
#ifdef HAVE_ATOMIC_H
atomic_t refcount;
#define GST_BUFFER_REFCOUNT(buf) (atomic_read(&(GST_BUFFER((buf))->refcount)))
#else
int refcount;
#define GST_BUFFER_REFCOUNT(buf) (GST_BUFFER(buf)->refcount)
#endif
/* data type of this buffer */
guint16 type;
/* flags */
guint16 flags;
/* pointer to data, its size, and offset in original source if known */
guchar *data;
guint32 size;
guint32 maxsize;
guint32 offset;
/* timestamp */
guint64 timestamp;
/* max age */
guint64 maxage;
/* pointer to metadata, is really lame right now */
GSList *metas;
/* subbuffer support, who's my parent? */
GstBuffer *parent;
/* this is a pointer to the buffer pool (if any) */
GstBufferPool *pool;
};
/* initialisation */
void _gst_buffer_initialize (void);
/* creating a new buffer from scratch */
GstBuffer* gst_buffer_new (void);
GstBuffer* gst_buffer_new_from_pool (GstBufferPool *pool);
/* creating a subbuffer */
GstBuffer* gst_buffer_create_sub (GstBuffer *parent, guint32 offset, guint32 size);
/* adding data to a buffer */
GstBuffer* gst_buffer_append (GstBuffer *buffer, GstBuffer *append);
/* refcounting */
void gst_buffer_ref (GstBuffer *buffer);
void gst_buffer_ref_by_count (GstBuffer *buffer, int count);
void gst_buffer_unref (GstBuffer *buffer);
/* destroying the buffer */
void gst_buffer_destroy (GstBuffer *buffer);
/* add, retrieve, and remove metadata from the buffer */
void gst_buffer_add_meta (GstBuffer *buffer, GstMeta *meta);
void gst_buffer_remove_meta (GstBuffer *buffer, GstMeta *meta);
GstMeta* gst_buffer_get_first_meta (GstBuffer *buffer);
GSList* gst_buffer_get_metas (GstBuffer *buffer);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_BUFFER_H__ */
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