mirror-ffmpeg-sys 0.1.10

mirror ffmpeg sys crate
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

/*
 * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
 * Copyright (C) 2009 David Conrad
 * Copyright (C) 2011 Jordi Ortiz
 *
 * 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 AVCODEC_DIRAC_H
#define AVCODEC_DIRAC_H

/**
 * @file
 * Interface to Dirac Decoder/Encoder
 * @author Marco Gerards <marco@gnu.org>
 * @author David Conrad
 * @author Jordi Ortiz
 */

#include <stddef.h>
#include <stdint.h>

#include "libavutil/pixfmt.h"
#include "libavutil/rational.h"

/**
 * The spec limits the number of wavelet decompositions to 4 for both
 * level 1 (VC-2) and 128 (long-gop default).
 * 5 decompositions is the maximum before >16-bit buffers are needed.
 * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting
 * the others to 4 decompositions (or 3 for the fidelity filter).
 *
 * We use this instead of MAX_DECOMPOSITIONS to save some memory.
 */
#define MAX_DWT_LEVELS 5

/**
 * Parse code values:
 *
 * Dirac Specification ->
 * 9.6.1  Table 9.1
 *
 * VC-2 Specification  ->
 * 10.4.1 Table 10.1
 */

enum DiracParseCodes {
    DIRAC_PCODE_SEQ_HEADER      = 0x00,
    DIRAC_PCODE_END_SEQ         = 0x10,
    DIRAC_PCODE_AUX             = 0x20,
    DIRAC_PCODE_PAD             = 0x30,
    DIRAC_PCODE_PICTURE_CODED   = 0x08,
    DIRAC_PCODE_PICTURE_RAW     = 0x48,
    DIRAC_PCODE_PICTURE_LOW_DEL = 0xC8,
    DIRAC_PCODE_PICTURE_HQ      = 0xE8,
    DIRAC_PCODE_INTER_NOREF_CO1 = 0x0A,
    DIRAC_PCODE_INTER_NOREF_CO2 = 0x09,
    DIRAC_PCODE_INTER_REF_CO1   = 0x0D,
    DIRAC_PCODE_INTER_REF_CO2   = 0x0E,
    DIRAC_PCODE_INTRA_REF_CO    = 0x0C,
    DIRAC_PCODE_INTRA_REF_RAW   = 0x4C,
    DIRAC_PCODE_INTRA_REF_PICT  = 0xCC,
    DIRAC_PCODE_MAGIC           = 0x42424344,
};

typedef struct DiracVersionInfo {
    int major;
    int minor;
} DiracVersionInfo;

typedef struct AVDiracSeqHeader {
    unsigned width;
    unsigned height;
    uint8_t chroma_format;          ///< 0: 444  1: 422  2: 420

    uint8_t interlaced;
    uint8_t top_field_first;

    uint8_t frame_rate_index;       ///< index into dirac_frame_rate[]
    uint8_t aspect_ratio_index;     ///< index into dirac_aspect_ratio[]

    uint16_t clean_width;
    uint16_t clean_height;
    uint16_t clean_left_offset;
    uint16_t clean_right_offset;

    uint8_t pixel_range_index;      ///< index into dirac_pixel_range_presets[]
    uint8_t color_spec_index;       ///< index into dirac_color_spec_presets[]

    int profile;
    int level;

    AVRational framerate;
    AVRational sample_aspect_ratio;

    enum AVPixelFormat pix_fmt;
    enum AVColorRange color_range;
    enum AVColorPrimaries color_primaries;
    enum AVColorTransferCharacteristic color_trc;
    enum AVColorSpace colorspace;

    DiracVersionInfo version;
    int bit_depth;
} AVDiracSeqHeader;

/**
 * Parse a Dirac sequence header.
 *
 * @param dsh this function will allocate and fill an AVDiracSeqHeader struct
 *            and write it into this pointer. The caller must free it with
 *            av_free().
 * @param buf the data buffer
 * @param buf_size the size of the data buffer in bytes
 * @param log_ctx if non-NULL, this function will log errors here
 * @return 0 on success, a negative AVERROR code on failure
 */
int av_dirac_parse_sequence_header(AVDiracSeqHeader **dsh,
                                   const uint8_t *buf, size_t buf_size,
                                   void *log_ctx);

#endif /* AVCODEC_DIRAC_H */