mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
4e0da7d311
Do this by putting an AVBuffer structure into BufferPoolEntry and reuse it for all subsequent uses of said BufferPoolEntry. Reviewed-by: James Almer <jamrial@gmail.com> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
112 lines
3.0 KiB
C
112 lines
3.0 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; 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 <stdatomic.h>
|
|
#include <stdint.h>
|
|
|
|
#include "internal.h"
|
|
#include "buffer.h"
|
|
#include "thread.h"
|
|
|
|
/**
|
|
* The buffer was av_realloc()ed, so it is reallocatable.
|
|
*/
|
|
#define BUFFER_FLAG_REALLOCATABLE (1 << 0)
|
|
/**
|
|
* The AVBuffer structure is part of a larger structure
|
|
* and should not be freed.
|
|
*/
|
|
#define BUFFER_FLAG_NO_FREE (1 << 1)
|
|
|
|
struct AVBuffer {
|
|
uint8_t *data; /**< data described by this buffer */
|
|
size_t size; /**< size of data in bytes */
|
|
|
|
/**
|
|
* number of existing AVBufferRef instances referring to this buffer
|
|
*/
|
|
atomic_uint 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 AV_BUFFER_FLAG_*
|
|
*/
|
|
int flags;
|
|
|
|
/**
|
|
* A combination of BUFFER_FLAG_*
|
|
*/
|
|
int flags_internal;
|
|
};
|
|
|
|
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 *next;
|
|
|
|
/*
|
|
* An AVBuffer structure to (re)use as AVBuffer for subsequent uses
|
|
* of this BufferPoolEntry.
|
|
*/
|
|
AVBuffer buffer;
|
|
} BufferPoolEntry;
|
|
|
|
struct AVBufferPool {
|
|
AVMutex mutex;
|
|
BufferPoolEntry *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.
|
|
*/
|
|
atomic_uint refcount;
|
|
|
|
size_t size;
|
|
void *opaque;
|
|
AVBufferRef* (*alloc)(size_t size);
|
|
AVBufferRef* (*alloc2)(void *opaque, size_t size);
|
|
void (*pool_free)(void *opaque);
|
|
};
|
|
|
|
#endif /* AVUTIL_BUFFER_INTERNAL_H */
|