aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/dca.h
blob: 172c965b3b412fa80aa9aa70a2a77b4b88fde3fd (plain) (blame)
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
/*
 * DCA compatible decoder
 * Copyright (C) 2004 Gildas Bazin
 * Copyright (C) 2004 Benjamin Zores
 * Copyright (C) 2006 Benjamin Larsson
 * Copyright (C) 2007 Konstantin Shishkov
 * Copyright (C) 2016 foo86
 *
 * 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_DCA_H
#define AVCODEC_DCA_H

#include <stdint.h>

#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"

#include "get_bits.h"

#define DCA_CORE_FRAME_HEADER_SIZE      18

enum DCAParseError {
    DCA_PARSE_ERROR_SYNC_WORD       = -1,
    DCA_PARSE_ERROR_DEFICIT_SAMPLES = -2,
    DCA_PARSE_ERROR_PCM_BLOCKS      = -3,
    DCA_PARSE_ERROR_FRAME_SIZE      = -4,
    DCA_PARSE_ERROR_AMODE           = -5,
    DCA_PARSE_ERROR_SAMPLE_RATE     = -6,
    DCA_PARSE_ERROR_RESERVED_BIT    = -7,
    DCA_PARSE_ERROR_LFE_FLAG        = -8,
    DCA_PARSE_ERROR_PCM_RES         = -9,
    DCA_PARSE_ERROR_INVALIDDATA     = -10,
};

typedef struct DCACoreFrameHeader {
    uint8_t     normal_frame;       ///< Frame type
    uint8_t     deficit_samples;    ///< Deficit sample count
    uint8_t     crc_present;        ///< CRC present flag
    uint8_t     npcmblocks;         ///< Number of PCM sample blocks
    uint16_t    frame_size;         ///< Primary frame byte size
    uint8_t     audio_mode;         ///< Audio channel arrangement
    uint8_t     sr_code;            ///< Core audio sampling frequency
    uint8_t     br_code;            ///< Transmission bit rate
    uint8_t     drc_present;        ///< Embedded dynamic range flag
    uint8_t     ts_present;         ///< Embedded time stamp flag
    uint8_t     aux_present;        ///< Auxiliary data flag
    uint8_t     hdcd_master;        ///< HDCD mastering flag
    uint8_t     ext_audio_type;     ///< Extension audio descriptor flag
    uint8_t     ext_audio_present;  ///< Extended coding flag
    uint8_t     sync_ssf;           ///< Audio sync word insertion flag
    uint8_t     lfe_present;        ///< Low frequency effects flag
    uint8_t     predictor_history;  ///< Predictor history flag switch
    uint8_t     filter_perfect;     ///< Multirate interpolator switch
    uint8_t     encoder_rev;        ///< Encoder software revision
    uint8_t     copy_hist;          ///< Copy history
    uint8_t     pcmr_code;          ///< Source PCM resolution
    uint8_t     sumdiff_front;      ///< Front sum/difference flag
    uint8_t     sumdiff_surround;   ///< Surround sum/difference flag
    uint8_t     dn_code;            ///< Dialog normalization / unspecified
} DCACoreFrameHeader;

enum DCASpeaker {
    DCA_SPEAKER_C,    DCA_SPEAKER_L,    DCA_SPEAKER_R,    DCA_SPEAKER_Ls,
    DCA_SPEAKER_Rs,   DCA_SPEAKER_LFE1, DCA_SPEAKER_Cs,   DCA_SPEAKER_Lsr,
    DCA_SPEAKER_Rsr,  DCA_SPEAKER_Lss,  DCA_SPEAKER_Rss,  DCA_SPEAKER_Lc,
    DCA_SPEAKER_Rc,   DCA_SPEAKER_Lh,   DCA_SPEAKER_Ch,   DCA_SPEAKER_Rh,
    DCA_SPEAKER_LFE2, DCA_SPEAKER_Lw,   DCA_SPEAKER_Rw,   DCA_SPEAKER_Oh,
    DCA_SPEAKER_Lhs,  DCA_SPEAKER_Rhs,  DCA_SPEAKER_Chr,  DCA_SPEAKER_Lhr,
    DCA_SPEAKER_Rhr,  DCA_SPEAKER_Cl,   DCA_SPEAKER_Ll,   DCA_SPEAKER_Rl,
    DCA_SPEAKER_RSV1, DCA_SPEAKER_RSV2, DCA_SPEAKER_RSV3, DCA_SPEAKER_RSV4,

    DCA_SPEAKER_COUNT
};

enum DCASpeakerMask {
    DCA_SPEAKER_MASK_C     = 0x00000001,
    DCA_SPEAKER_MASK_L     = 0x00000002,
    DCA_SPEAKER_MASK_R     = 0x00000004,
    DCA_SPEAKER_MASK_Ls    = 0x00000008,
    DCA_SPEAKER_MASK_Rs    = 0x00000010,
    DCA_SPEAKER_MASK_LFE1  = 0x00000020,
    DCA_SPEAKER_MASK_Cs    = 0x00000040,
    DCA_SPEAKER_MASK_Lsr   = 0x00000080,
    DCA_SPEAKER_MASK_Rsr   = 0x00000100,
    DCA_SPEAKER_MASK_Lss   = 0x00000200,
    DCA_SPEAKER_MASK_Rss   = 0x00000400,
    DCA_SPEAKER_MASK_Lc    = 0x00000800,
    DCA_SPEAKER_MASK_Rc    = 0x00001000,
    DCA_SPEAKER_MASK_Lh    = 0x00002000,
    DCA_SPEAKER_MASK_Ch    = 0x00004000,
    DCA_SPEAKER_MASK_Rh    = 0x00008000,
    DCA_SPEAKER_MASK_LFE2  = 0x00010000,
    DCA_SPEAKER_MASK_Lw    = 0x00020000,
    DCA_SPEAKER_MASK_Rw    = 0x00040000,
    DCA_SPEAKER_MASK_Oh    = 0x00080000,
    DCA_SPEAKER_MASK_Lhs   = 0x00100000,
    DCA_SPEAKER_MASK_Rhs   = 0x00200000,
    DCA_SPEAKER_MASK_Chr   = 0x00400000,
    DCA_SPEAKER_MASK_Lhr   = 0x00800000,
    DCA_SPEAKER_MASK_Rhr   = 0x01000000,
    DCA_SPEAKER_MASK_Cl    = 0x02000000,
    DCA_SPEAKER_MASK_Ll    = 0x04000000,
    DCA_SPEAKER_MASK_Rl    = 0x08000000,
};

#define DCA_SPEAKER_LAYOUT_MONO         (DCA_SPEAKER_MASK_C)
#define DCA_SPEAKER_LAYOUT_STEREO       (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R)
#define DCA_SPEAKER_LAYOUT_2POINT1      (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1)
#define DCA_SPEAKER_LAYOUT_3_0          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C)
#define DCA_SPEAKER_LAYOUT_2_1          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs)
#define DCA_SPEAKER_LAYOUT_3_1          (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs)
#define DCA_SPEAKER_LAYOUT_2_2          (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
#define DCA_SPEAKER_LAYOUT_5POINT0      (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs)
#define DCA_SPEAKER_LAYOUT_5POINT1      (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1)
#define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw)
#define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1)

#define DCA_HAS_STEREO(mask) \
    ((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO)

enum DCASpeakerPair {
    DCA_SPEAKER_PAIR_C      = 0x0001,
    DCA_SPEAKER_PAIR_LR     = 0x0002,
    DCA_SPEAKER_PAIR_LsRs   = 0x0004,
    DCA_SPEAKER_PAIR_LFE1   = 0x0008,
    DCA_SPEAKER_PAIR_Cs     = 0x0010,
    DCA_SPEAKER_PAIR_LhRh   = 0x0020,
    DCA_SPEAKER_PAIR_LsrRsr = 0x0040,
    DCA_SPEAKER_PAIR_Ch     = 0x0080,
    DCA_SPEAKER_PAIR_Oh     = 0x0100,
    DCA_SPEAKER_PAIR_LcRc   = 0x0200,
    DCA_SPEAKER_PAIR_LwRw   = 0x0400,
    DCA_SPEAKER_PAIR_LssRss = 0x0800,
    DCA_SPEAKER_PAIR_LFE2   = 0x1000,
    DCA_SPEAKER_PAIR_LhsRhs = 0x2000,
    DCA_SPEAKER_PAIR_Chr    = 0x4000,
    DCA_SPEAKER_PAIR_LhrRhr = 0x8000
};

/**
 * Return number of individual channels in DCASpeakerPair mask
 */
static inline int ff_dca_count_chs_for_mask(unsigned int mask)
{
    return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16));
}

enum DCARepresentationType {
    DCA_REPR_TYPE_LtRt = 2,
    DCA_REPR_TYPE_LhRh = 3
};

enum DCAExtensionMask {
    DCA_CSS_CORE   = 0x001,
    DCA_CSS_XXCH   = 0x002,
    DCA_CSS_X96    = 0x004,
    DCA_CSS_XCH    = 0x008,
    DCA_CSS_MASK   = 0x00f,
    DCA_EXSS_CORE  = 0x010,
    DCA_EXSS_XBR   = 0x020,
    DCA_EXSS_XXCH  = 0x040,
    DCA_EXSS_X96   = 0x080,
    DCA_EXSS_LBR   = 0x100,
    DCA_EXSS_XLL   = 0x200,
    DCA_EXSS_RSV1  = 0x400,
    DCA_EXSS_RSV2  = 0x800,
    DCA_EXSS_MASK  = 0xff0,
};

enum DCADownMixType {
    DCA_DMIX_TYPE_1_0,
    DCA_DMIX_TYPE_LoRo,
    DCA_DMIX_TYPE_LtRt,
    DCA_DMIX_TYPE_3_0,
    DCA_DMIX_TYPE_2_1,
    DCA_DMIX_TYPE_2_2,
    DCA_DMIX_TYPE_3_1,

    DCA_DMIX_TYPE_COUNT
};

extern av_export const uint32_t avpriv_dca_sample_rates[16];

extern const uint32_t ff_dca_sampling_freqs[16];
extern const uint8_t ff_dca_freq_ranges[16];
extern const uint8_t ff_dca_bits_per_sample[8];


/**
 * Convert bitstream to one representation based on sync marker
 */
int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst,
                                 int max_size);

/**
 * Parse and validate core frame header
 * @return 0 on success, negative DCA_PARSE_ERROR_ code on failure
 */
int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, uint8_t *buf, int size);

int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb);

#endif /* AVCODEC_DCA_H */