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 was av_realloc()ed, so it is reallocatable.
30 */
31 #define BUFFER_FLAG_REALLOCATABLE (1 << 0)
32 /**
33 * The AVBuffer structure is part of a larger structure
34 * and should not be freed.
35 */
36 #define BUFFER_FLAG_NO_FREE (1 << 1)
37
39 uint8_t *
data;
/**< data described by this buffer */
40 size_t size;
/**< size of data in bytes */
41
42 /**
43 * number of existing AVBufferRef instances referring to this buffer
44 */
46
47 /**
48 * a callback for freeing the data
49 */
51
52 /**
53 * an opaque pointer, to be used by the freeing callback
54 */
56
57 /**
58 * A combination of AV_BUFFER_FLAG_*
59 */
61
62 /**
63 * A combination of BUFFER_FLAG_*
64 */
66 };
67
70
71 /*
72 * Backups of the original opaque/free of the AVBuffer corresponding to
73 * data. They will be used to free the buffer when the pool is freed.
74 */
77
80
81 /*
82 * An AVBuffer structure to (re)use as AVBuffer for subsequent uses
83 * of this BufferPoolEntry.
84 */
87
91
92 /*
93 * This is used to track when the pool is to be freed.
94 * The pointer to the pool itself held by the caller is considered to
95 * be one reference. Each buffer requested by the caller increases refcount
96 * by one, returning the buffer to the pool decreases it by one.
97 * refcount reaches zero when the buffer has been uninited AND all the
98 * buffers have been released, then it's safe to free the pool and all
99 * the buffers in it.
100 */
102
108 };
109
110 #endif /* AVUTIL_BUFFER_INTERNAL_H */