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- /*
- * 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 <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;
- volatile int nb_allocated;
- int size;
- AVBufferRef* (*alloc)(int size);
- };
- #endif /* AVUTIL_BUFFER_INTERNAL_H */
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