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