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  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 */
  142.