mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-15 11:44:49 +00:00
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVUTIL_BUFFER_INTERNAL_H
|
|
#define AVUTIL_BUFFER_INTERNAL_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "buffer.h"
|
|
|
|
/**
|
|
* The buffer is always treated as read-only.
|
|
*/
|
|
#define BUFFER_FLAG_READONLY (1 << 0)
|
|
/**
|
|
* The buffer was av_realloc()ed, so it is reallocatable.
|
|
*/
|
|
#define BUFFER_FLAG_REALLOCATABLE (1 << 1)
|
|
|
|
struct AVBuffer {
|
|
uint8_t *data; /**< data described by this buffer */
|
|
int size; /**< size of data in bytes */
|
|
|
|
/**
|
|
* number of existing AVBufferRef instances referring to this buffer
|
|
*/
|
|
volatile int refcount;
|
|
|
|
/**
|
|
* a callback for freeing the data
|
|
*/
|
|
void (*free)(void *opaque, uint8_t *data);
|
|
|
|
/**
|
|
* an opaque pointer, to be used by the freeing callback
|
|
*/
|
|
void *opaque;
|
|
|
|
/**
|
|
* A combination of BUFFER_FLAG_*
|
|
*/
|
|
int flags;
|
|
};
|
|
|
|
typedef struct BufferPoolEntry {
|
|
uint8_t *data;
|
|
|
|
/*
|
|
* Backups of the original opaque/free of the AVBuffer corresponding to
|
|
* data. They will be used to free the buffer when the pool is freed.
|
|
*/
|
|
void *opaque;
|
|
void (*free)(void *opaque, uint8_t *data);
|
|
|
|
AVBufferPool *pool;
|
|
struct BufferPoolEntry * volatile next;
|
|
} BufferPoolEntry;
|
|
|
|
struct AVBufferPool {
|
|
BufferPoolEntry * volatile pool;
|
|
|
|
/*
|
|
* This is used to track when the pool is to be freed.
|
|
* The pointer to the pool itself held by the caller is considered to
|
|
* be one reference. Each buffer requested by the caller increases refcount
|
|
* by one, returning the buffer to the pool decreases it by one.
|
|
* refcount reaches zero when the buffer has been uninited AND all the
|
|
* buffers have been released, then it's safe to free the pool and all
|
|
* the buffers in it.
|
|
*/
|
|
volatile int refcount;
|
|
|
|
int size;
|
|
AVBufferRef* (*alloc)(int size);
|
|
};
|
|
|
|
#endif /* AVUTIL_BUFFER_INTERNAL_H */
|