1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #ifndef AVUTIL_BUFFER_INTERNAL_H
20 #define AVUTIL_BUFFER_INTERNAL_H
21
22 #include <stdatomic.h>
23 #include <stdint.h>
24
27
28 /**
29 * The buffer is always treated as read-only.
30 */
31 #define BUFFER_FLAG_READONLY (1 << 0)
32 /**
33 * The buffer was av_realloc()ed, so it is reallocatable.
34 */
35 #define BUFFER_FLAG_REALLOCATABLE (1 << 1)
36
39 int size;
/**< size of data in bytes */
40
41 /**
42 * number of existing AVBufferRef instances referring to this buffer
43 */
45
46 /**
47 * a callback for freeing the data
48 */
50
51 /**
52 * an opaque pointer, to be used by the freeing callback
53 */
55
56 /**
57 * A combination of BUFFER_FLAG_*
58 */
60 };
61
64
65 /*
66 * Backups of the original opaque/free of the AVBuffer corresponding to
67 * data. They will be used to free the buffer when the pool is freed.
68 */
71
75
79
80 /*
81 * This is used to track when the pool is to be freed.
82 * The pointer to the pool itself held by the caller is considered to
83 * be one reference. Each buffer requested by the caller increases refcount
84 * by one, returning the buffer to the pool decreases it by one.
85 * refcount reaches zero when the buffer has been uninited AND all the
86 * buffers have been released, then it's safe to free the pool and all
87 * the buffers in it.
88 */
90
96 };
97
98 #endif /* AVUTIL_BUFFER_INTERNAL_H */
void(* free)(void *opaque, uint8_t *data)
a callback for freeing the data
struct BufferPoolEntry * next
uint8_t * data
data described by this buffer
atomic_uint refcount
number of existing AVBufferRef instances referring to this buffer
void(* pool_free)(void *opaque)
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
void(* free)(void *opaque, uint8_t *data)
int flags
A combination of BUFFER_FLAG_*.
A reference counted buffer type.
refcounted data buffer API
void * opaque
an opaque pointer, to be used by the freeing callback
A reference to a data buffer.
int size
size of data in bytes