gstreamer/gst/gstbuffer.h
Joshua N. Pritikin b77946f3a0 Oops! Turn off by default.
Original commit message from CVS:
Oops!  Turn off by default.
2001-09-23 06:07:15 +00:00

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6.7 KiB
C

/* 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__
//
// Define this to add file:line info to each GstBuffer showing
// the location in the source code where the buffer was created.
//
// #define GST_BUFFER_WHERE
//
// Then in gdb, you can `call gst_buffer_print_live()' to get a list
// of allocated GstBuffers and also the file:line where they were
// allocated.
//
#include <gst/gstdata.h>
#include <gst/gstobject.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_ATOMIC_H
#include <asm/atomic.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
extern GType _gst_buffer_type;
#define GST_TYPE_BUFFER (_gst_buffer_type)
#define GST_BUFFER(buf) ((GstBuffer *)(buf))
#define GST_IS_BUFFER(buf) (GST_DATA_TYPE(buf) == GST_TYPE_BUFFER)
#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_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_MAXAGE(buf) (GST_BUFFER(buf)->maxage)
#define GST_BUFFER_BUFFERPOOL(buf) (GST_BUFFER(buf)->pool)
#define GST_BUFFER_PARENT(buf) (GST_BUFFER(buf)->parent)
#define GST_BUFFER_POOL_PRIVATE(buf) (GST_BUFFER(buf)->pool_private)
#define GST_BUFFER_COPY_FUNC(buf) (GST_BUFFER(buf)->copy)
#define GST_BUFFER_FREE_FUNC(buf) (GST_BUFFER(buf)->free)
#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;
typedef void (*GstBufferFreeFunc) (GstBuffer *buf);
typedef GstBuffer *(*GstBufferCopyFunc) (GstBuffer *srcbuf);
#include <gst/gstbufferpool.h>
struct _GstBuffer {
GstData data_type;
/* 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
/* flags */
guint16 flags;
/* pointer to data, its size, and offset in original source if known */
guchar *data;
guint32 size;
guint32 maxsize;
guint32 offset;
#ifdef GST_BUFFER_WHERE
const gchar *file;
gint line;
#endif
/* timestamp */
gint64 timestamp;
gint64 maxage;
/* subbuffer support, who's my parent? */
GstBuffer *parent;
/* this is a pointer to the buffer pool (if any) */
GstBufferPool *pool;
gpointer pool_private;
/* utility function pointers */
GstBufferFreeFunc free; // free the data associated with the buffer
GstBufferCopyFunc copy; // copy the data from one buffer to another
};
#ifdef GST_BUFFER_WHERE
# define GST_WHERE_ARGS const gchar *where_file, gint where_line
# define GST_WHERE_ARGS_ GST_WHERE_ARGS,
# define GST_WHERE_VARS where_file, where_line
# define GST_WHERE_VARS_ where_file, where_line,
# define gst_buffer_new() \
gst_buffer_new_loc(__FILE__, __LINE__)
# define gst_buffer_create_sub(parent, offset, size) \
gst_buffer_create_sub_loc(__FILE__, __LINE__, parent, offset, size)
# define gst_buffer_copy(buffer) \
gst_buffer_copy_loc(__FILE__, __LINE__, buffer)
# define gst_buffer_merge(buf1, buf2) \
gst_buffer_merge_loc(__FILE__, __LINE__, buf1, buf2)
# define gst_buffer_span(buf1, offset, buf2, len) \
gst_buffer_span_loc(__FILE__, __LINE__, buf1, offset, buf2, len)
# define gst_buffer_append(buf, buf2) \
gst_buffer_append_loc(__FILE__, __LINE__, buf, buf2)
#else /* GST_BUFFER_WHERE */
# define GST_WHERE_ARGS
# define GST_WHERE_ARGS_
# define GST_WHERE_VARS
# define GST_WHERE_VARS_
# define gst_buffer_new() \
gst_buffer_new_loc()
# define gst_buffer_create_sub(parent, offset, size) \
gst_buffer_create_sub_loc(parent, offset, size)
# define gst_buffer_copy(buffer) \
gst_buffer_copy_loc(buffer)
# define gst_buffer_merge(buf1, buf2) \
gst_buffer_merge_loc(buf1, buf2)
# define gst_buffer_span(buf1, offset, buf2, len) \
gst_buffer_span_loc(buf1, offset, buf2, len)
# define gst_buffer_append(buf, buf2) \
gst_buffer_append_loc(buf, buf2)
#endif /* GST_BUFFER_WHERE */
/* initialisation */
void _gst_buffer_initialize (void);
/* creating a new buffer from scratch */
GstBuffer* gst_buffer_new_loc (GST_WHERE_ARGS);
GstBuffer* gst_buffer_new_from_pool (GstBufferPool *pool, guint32 offset, guint32 size);
/* creating a subbuffer */
GstBuffer* gst_buffer_create_sub_loc (GST_WHERE_ARGS_
GstBuffer *parent, guint32 offset, guint32 size);
/* refcounting */
void gst_buffer_ref (GstBuffer *buffer);
void gst_buffer_unref (GstBuffer *buffer);
/* destroying the buffer */
void gst_buffer_destroy (GstBuffer *buffer);
/* copy buffer */
GstBuffer* gst_buffer_copy_loc (GST_WHERE_ARGS_
GstBuffer *buffer);
/* merge, span, or append two buffers, intelligently */
GstBuffer* gst_buffer_merge_loc (GST_WHERE_ARGS_
GstBuffer *buf1, GstBuffer *buf2);
GstBuffer* gst_buffer_span_loc (GST_WHERE_ARGS_
GstBuffer *buf1,guint32 offset,GstBuffer *buf2,guint32 len);
GstBuffer* gst_buffer_append_loc (GST_WHERE_ARGS_
GstBuffer *buf, GstBuffer *buf2);
gboolean gst_buffer_is_span_fast (GstBuffer *buf1, GstBuffer *buf2);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_BUFFER_H__ */