1 /*
2 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
3 * Copyright (C) 2009 David Conrad
4 * Copyright (C) 2011 Jordi Ortiz
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #ifndef AVCODEC_DIRAC_H
24 #define AVCODEC_DIRAC_H
25
26 /**
27 * @file
28 * Interface to Dirac Decoder/Encoder
29 * @author Marco Gerards <marco@gnu.org>
30 * @author David Conrad
31 * @author Jordi Ortiz
32 */
33
34 #include <stddef.h>
35 #include <stdint.h>
36
39
40 /**
41 * The spec limits the number of wavelet decompositions to 4 for both
42 * level 1 (VC-2) and 128 (long-gop default).
43 * 5 decompositions is the maximum before >16-bit buffers are needed.
44 * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting
45 * the others to 4 decompositions (or 3 for the fidelity filter).
46 *
47 * We use this instead of MAX_DECOMPOSITIONS to save some memory.
48 */
49 #define MAX_DWT_LEVELS 5
50
51 /**
52 * Parse code values:
53 *
54 * Dirac Specification ->
55 * 9.6.1 Table 9.1
56 *
57 * VC-2 Specification ->
58 * 10.4.1 Table 10.1
59 */
60
78 };
79
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115
119
120 /**
121 * Parse a Dirac sequence header.
122 *
123 * @param dsh this function will allocate and fill an AVDiracSeqHeader struct
124 * and write it into this pointer. The caller must free it with
125 * av_free().
126 * @param buf the data buffer
127 * @param buf_size the size of the data buffer in bytes
128 * @param log_ctx if non-NULL, this function will log errors here
129 * @return 0 on success, a negative AVERROR code on failure
130 */
132 const uint8_t *buf, size_t buf_size,
133 void *log_ctx);
134
135 #endif /* AVCODEC_DIRAC_H */