ffmpeg/libavcodec/atrac3data.h

   1 /*
   2  * ATRAC3 compatible decoder data
   3  * Copyright (c) 2006-2007 Maxim Poliakovski
   4  * Copyright (c) 2006-2007 Benjamin Larsson
   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 /**
  24  * @file
  25  * ATRAC3 AKA RealAudio 8 compatible decoder data
  26  */
  27
  28 #ifndef AVCODEC_ATRAC3DATA_H
  29 #define AVCODEC_ATRAC3DATA_H
  30
  31 #include <stdint.h>
  32
  33 /* VLC tables */
  34
  35 static const uint8_t huffcode1[9] = {
  36     0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F
  37 };
  38
  39 static const uint8_t huffbits1[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 };
  40
  41 static const uint8_t huffcode2[5] = { 0x0, 0x4, 0x5, 0x6, 0x7 };
  42
  43 static const uint8_t huffbits2[5] = { 1, 3, 3, 3, 3 };
  44
  45 static const uint8_t huffcode3[7] = { 0x0, 0x4, 0x5, 0xC, 0xD, 0xE, 0xF };
  46
  47 static const uint8_t huffbits3[7] = { 1, 3, 3, 4, 4, 4, 4 };
  48
  49 static const uint8_t huffcode4[9] = {
  50     0x0, 0x4, 0x5, 0xC, 0xD, 0x1C, 0x1D, 0x1E, 0x1F
  51 };
  52
  53 static const uint8_t huffbits4[9] = { 1, 3, 3, 4, 4, 5, 5, 5, 5 };
  54
  55 static const uint8_t huffcode5[15] = {
  56     0x00, 0x02, 0x03, 0x08, 0x09, 0x0A, 0x0B, 0x1C,
  57     0x1D, 0x3C, 0x3D, 0x3E, 0x3F, 0x0C, 0x0D
  58 };
  59
  60 static const uint8_t huffbits5[15] = {
  61     2, 3, 3, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 4, 4
  62 };
  63
  64 static const uint8_t huffcode6[31] = {
  65     0x00, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x14,
  66     0x15, 0x16, 0x17, 0x18, 0x19, 0x34, 0x35, 0x36,
  67     0x37, 0x38, 0x39, 0x3A, 0x3B, 0x78, 0x79, 0x7A,
  68     0x7B, 0x7C, 0x7D, 0x7E, 0x7F, 0x08, 0x09
  69 };
  70
  71 static const uint8_t huffbits6[31] = {
  72     3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6,
  73     6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4
  74 };
  75
  76 static const uint8_t huffcode7[63] = {
  77     0x00, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E,
  78     0x0F, 0x10, 0x11, 0x24, 0x25, 0x26, 0x27, 0x28,
  79     0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30,
  80     0x31, 0x32, 0x33, 0x68, 0x69, 0x6A, 0x6B, 0x6C,
  81     0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74,
  82     0x75, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF2,
  83     0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA,
  84     0xFB, 0xFC, 0xFD, 0xFE, 0xFF, 0x02, 0x03
  85 };
  86
  87 static const uint8_t huffbits7[63] = {
  88     3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6,
  89     6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7,
  90     7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8,
  91     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4
  92 };
  93
  94 static const uint8_t huff_tab_sizes[7] = {
  95     9, 5, 7, 9, 15, 31, 63,
  96 };
  97
  98 static const uint8_t* const huff_codes[7] = {
  99     huffcode1, huffcode2, huffcode3, huffcode4, huffcode5, huffcode6, huffcode7
 100 };
 101
 102 static const uint8_t* const huff_bits[7] = {
 103     huffbits1, huffbits2, huffbits3, huffbits4, huffbits5, huffbits6, huffbits7,
 104 };
 105
 106 static const uint16_t atrac3_vlc_offs[9] = {
 107     0, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096
 108 };
 109
 110 /* selector tables */
 111
 112 static const uint8_t clc_length_tab[8] = { 0, 4, 3, 3, 4, 4, 5, 6 };
 113
 114 static const int8_t mantissa_clc_tab[4] = { 0, 1, -2, -1 };
 115
 116 static const int8_t mantissa_vlc_tab[18] = {
 117     0, 0,  0, 1,  0, -1,  1, 0,  -1, 0,  1, 1,  1, -1,  -1, 1,  -1, -1
 118 };
 119
 120
 121 /* tables for the scalefactor decoding */
 122
 123 static const float inv_max_quant[8] = {
 124       0.0,       1.0 / 1.5, 1.0 /  2.5, 1.0 /  3.5,
 125       1.0 / 4.5, 1.0 / 7.5, 1.0 / 15.5, 1.0 / 31.5
 126 };
 127
 128 static const uint16_t subband_tab[33] = {
 129       0,   8,  16,  24,  32,  40,  48,  56,
 130      64,  80,  96, 112, 128, 144, 160, 176,
 131     192, 224, 256, 288, 320, 352, 384, 416,
 132     448, 480, 512, 576, 640, 704, 768, 896,
 133     1024
 134 };
 135
 136 /* joint stereo related tables */
 137 static const float matrix_coeffs[8] = {
 138     0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0
 139 };
 140
 141 #endif /* AVCODEC_ATRAC3DATA_H */