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160 lines
4.4 KiB
C
160 lines
4.4 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstbuffer.h: Header for GstBuffer object
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_BUFFER_H__
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#define __GST_BUFFER_H__
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#include <gst/gstobject.h>
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#include <gst/gstmeta.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_ATOMIC_H
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#include <asm/atomic.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define GST_BUFFER(buf) \
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((GstBuffer *)(buf))
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#define GST_BUFFER_FLAGS(buf) \
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(GST_BUFFER(buf)->flags)
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#define GST_BUFFER_FLAG_IS_SET(buf,flag) \
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(GST_BUFFER_FLAGS(buf) & (1<<(flag)))
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#define GST_BUFFER_FLAG_SET(buf,flag) \
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G_STMT_START{ (GST_BUFFER_FLAGS(buf) |= (1<<(flag))); }G_STMT_END
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#define GST_BUFFER_FLAG_UNSET(buf,flag) \
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G_STMT_START{ (GST_BUFFER_FLAGS(buf) &= ~(1<<(flag))); }G_STMT_END
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#define GST_BUFFER_DATA(buf) (GST_BUFFER(buf)->data)
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#define GST_BUFFER_SIZE(buf) (GST_BUFFER(buf)->size)
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#define GST_BUFFER_OFFSET(buf) (GST_BUFFER(buf)->offset)
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#define GST_BUFFER_MAXSIZE(buf) (GST_BUFFER(buf)->maxsize)
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#define GST_BUFFER_TIMESTAMP(buf) (GST_BUFFER(buf)->timestamp)
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#define GST_BUFFER_MAXAGE(buf) (GST_BUFFER(buf)->maxage)
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#define GST_BUFFER_BUFFERPOOL(buf) (GST_BUFFER(buf)->pool)
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#define GST_BUFFER_PARENT(buf) (GST_BUFFER(buf)->parent)
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#define GST_BUFFER_POOL_PRIVATE(buf) (GST_BUFFER(buf)->pool_private)
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#define GST_BUFFER_LOCK(buf) (g_mutex_lock(GST_BUFFER(buf)->lock))
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#define GST_BUFFER_TRYLOCK(buf) (g_mutex_trylock(GST_BUFFER(buf)->lock))
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#define GST_BUFFER_UNLOCK(buf) (g_mutex_unlock(GST_BUFFER(buf)->lock))
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typedef enum {
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GST_BUFFER_READONLY,
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GST_BUFFER_ORIGINAL,
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GST_BUFFER_DONTFREE,
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GST_BUFFER_FLUSH,
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GST_BUFFER_EOS,
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GST_BUFFER_DISCONTINUOUS,
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} GstBufferFlags;
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typedef struct _GstBuffer GstBuffer;
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#include <gst/gstbufferpool.h>
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struct _GstBuffer {
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/* locking */
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GMutex *lock;
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/* refcounting */
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#ifdef HAVE_ATOMIC_H
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atomic_t refcount;
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#define GST_BUFFER_REFCOUNT(buf) (atomic_read(&(GST_BUFFER((buf))->refcount)))
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#else
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int refcount;
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#define GST_BUFFER_REFCOUNT(buf) (GST_BUFFER(buf)->refcount)
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#endif
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/* flags */
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guint16 flags;
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/* pointer to data, its size, and offset in original source if known */
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guchar *data;
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guint32 size;
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guint32 maxsize;
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guint32 offset;
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/* timestamp */
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guint64 timestamp;
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/* max age */
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guint64 maxage;
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/* pointer to metadata, is really lame right now */
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GSList *metas;
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/* subbuffer support, who's my parent? */
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GstBuffer *parent;
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/* this is a pointer to the buffer pool (if any) */
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GstBufferPool *pool;
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gpointer pool_private;
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};
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/* initialisation */
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void _gst_buffer_initialize (void);
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/* creating a new buffer from scratch */
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GstBuffer* gst_buffer_new (void);
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GstBuffer* gst_buffer_new_from_pool (GstBufferPool *pool);
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/* creating a subbuffer */
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GstBuffer* gst_buffer_create_sub (GstBuffer *parent, guint32 offset, guint32 size);
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/* adding data to a buffer */
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GstBuffer* gst_buffer_append (GstBuffer *buffer, GstBuffer *append);
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/* refcounting */
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void gst_buffer_ref (GstBuffer *buffer);
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void gst_buffer_ref_by_count (GstBuffer *buffer, int count);
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void gst_buffer_unref (GstBuffer *buffer);
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/* destroying the buffer */
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void gst_buffer_destroy (GstBuffer *buffer);
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/* copy buffer */
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GstBuffer* gst_buffer_copy (GstBuffer *buffer);
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/* add, retrieve, and remove metadata from the buffer */
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void gst_buffer_add_meta (GstBuffer *buffer, GstMeta *meta);
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void gst_buffer_remove_meta (GstBuffer *buffer, GstMeta *meta);
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GstMeta* gst_buffer_get_first_meta (GstBuffer *buffer);
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GSList* gst_buffer_get_metas (GstBuffer *buffer);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_BUFFER_H__ */
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