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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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2745b823ab
Original commit message from CVS: added ref counting to the buffer pool. also _destroy will clean up the buffer pool mem_chunk if it is the default implementation
99 lines
3.2 KiB
C
99 lines
3.2 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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* gstbufferpool.h: Header for buffer-pool management
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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_POOL_H__
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#define __GST_BUFFER_POOL_H__
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#include <gst/gstbuffer.h>
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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_POOL(pool) \
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((GstBufferPool *)(pool))
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#define GST_BUFFER_POOL_LOCK(pool) (g_mutex_lock(GST_BUFFER_POOL(pool)->lock))
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typedef struct _GstBufferPool GstBufferPool;
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typedef GstBuffer* (*GstBufferPoolCreateFunction) (GstBufferPool *pool, gpointer user_data);
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typedef void (*GstBufferPoolDestroyFunction) (GstBufferPool *pool, GstBuffer *buffer, gpointer user_data);
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struct _GstBufferPool {
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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_POOL_REFCOUNT(pool) (atomic_read(&(GST_BUFFER_POOL((pool))->refcount)))
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#else
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int refcount;
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#define GST_BUFFER_POOL_REFCOUNT(pool) (GST_BUFFER_POOL(pool)->refcount)
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#endif
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/* will be called when a new buffer is to be created */
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GstBufferPoolCreateFunction new_buffer;
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/* user data to pass with the new_buffer function */
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gpointer new_user_data;
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gpointer destroy_user_data;
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GstBufferPoolDestroyFunction destroy_buffer;
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};
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void _gst_buffer_pool_initialize (void);
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/* creating a new buffer pool from scratch */
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GstBufferPool* gst_buffer_pool_new (void);
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/* creating a buffer from the pool */
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GstBuffer* gst_buffer_pool_new_buffer (GstBufferPool *pool);
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void gst_buffer_pool_destroy_buffer (GstBufferPool *pool, GstBuffer *buffer);
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/* refcounting */
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void gst_buffer_pool_ref (GstBufferPool *pool);
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void gst_buffer_pool_ref_by_count (GstBufferPool *pool, int count);
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void gst_buffer_pool_unref (GstBufferPool *buffer);
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/* setting create and destroy functions */
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void gst_buffer_pool_set_create_function (GstBufferPool *pool,
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GstBufferPoolCreateFunction create,
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gpointer user_data);
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void gst_buffer_pool_set_destroy_function (GstBufferPool *pool,
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GstBufferPoolDestroyFunction destroy,
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gpointer user_data);
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/* destroying the buffer pool */
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void gst_buffer_pool_destroy (GstBufferPool *pool);
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/* a default buffer pool implementation */
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GstBufferPool* gst_buffer_pool_get_default (GstBufferPool *oldpool, guint buffer_size, guint pool_size);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_BUFFER_POOL_H__ */
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