1 /* |
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2 * Copyright (c) 2010 Ixonos Plc. |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - Initial contribution |
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11 * |
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12 * Contributors: |
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13 * Ixonos Plc |
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14 * |
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15 * Description: |
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16 * |
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17 */ |
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18 |
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19 |
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20 /************************************************************************** |
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21 sfbdata.cpp - Sfb table definitions for AAC. |
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22 |
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23 Author(s): Juha Ojanpera |
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24 Copyright (c) 2000-2004 by Nokia Research Center, Speech and Audio Systems. |
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25 *************************************************************************/ |
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26 |
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27 /*-- Project Headers. --*/ |
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28 #include "aacdef.h" |
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29 |
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30 /* |
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31 Purpose: Sfb widths (long and short block) for each sampling rate. |
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32 Explanation: Supports frame lengths 1024 and 960. */ |
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33 |
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34 const int16 sfb_96_1024[] = { |
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35 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80, 88, 96, |
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36 108, 120, 132, 144, 156, 172, 188, 212, 240, 276, 320, 384, 448, 512, 576, |
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37 640, 704, 768, 832, 896, 960, 1024}; |
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38 |
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39 const int16 sfb_96_128[] = {4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128}; |
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40 const int16 sfb_96_120[] = {4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 120}; |
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41 |
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42 const int16 sfb_64_1024[] = { |
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43 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80, 88, 100, |
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44 112, 124, 140, 156, 172, 192, 216, 240, 268, 304, 344, 384, 424, 464, 504, |
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45 544, 584, 624, 664, 704, 744, 784, 824, 864, 904, 944, 984, 1024}; |
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46 const int16 sfb_64_960[] = { |
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47 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 64, 72, 80, 88, 100, |
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48 112, 124, 140, 156, 172, 192, 216, 240, 268, 304, 344, 384, 424, 464, 504, |
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49 544, 584, 624, 664, 704, 744, 784, 824, 864, 904, 944, 960}; |
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50 |
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51 const int16 sfb_64_128[] = {4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128}; |
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52 const int16 sfb_64_120[] = {4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 120}; |
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53 |
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54 const int16 sfb_48_1024[] = { |
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55 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, 80, 88, 96, 108, 120, |
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56 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384, 416, 448, 480, |
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57 512, 544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 1024}; |
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58 const int16 sfb_48_960[] = { |
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59 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, 80, 88, 96, 108, 120, |
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60 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384, 416, 448, 480, |
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61 512, 544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 960, 0}; |
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62 |
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63 const int16 sfb_48_128[] = |
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64 {4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 128}; |
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65 const int16 sfb_48_120[] = |
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66 {4, 8, 12, 16, 20, 28, 36, 44, 56, 68, 80, 96, 112, 120}; |
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67 |
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68 const int16 sfb_32_1024[] = { |
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69 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, 80, 88, 96, 108, 120, |
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70 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384, 416, 448, 480, |
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71 512, 544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 960, |
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72 992, 1024}; |
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73 const int16 sfb_32_960[] = |
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74 { 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 48, 56, 64, 72, 80, 88, 96, 108, 120, |
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75 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384, 416, 448, 480, |
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76 512, 544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 960, 0}; |
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77 |
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78 const int16 sfb_24_1024[] = { |
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79 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 52, 60, 68, 76, 84, 92, 100, 108, |
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80 116, 124, 136, 148, 160, 172, 188, 204, 220, 240, 260, 284, 308, 336, 364, |
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81 396, 432, 468, 508, 552, 600, 652, 704, 768, 832, 896, 960, 1024}; |
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82 |
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83 const int16 sfb_24_128[] = |
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84 { 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 128}; |
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85 const int16 sfb_24_120[] = |
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86 { 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 64, 76, 92, 108, 120}; |
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87 |
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88 const int16 sfb_16_1024[] = { |
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89 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 100, 112, 124, 136, 148, 160, |
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90 172, 184, 196, 212, 228, 244, 260, 280, 300, 320, 344, 368, 396, 424, 456, |
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91 492, 532, 572, 616, 664, 716, 772, 832, 896, 960, 1024}; |
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92 |
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93 const int16 sfb_16_128[] = |
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94 { 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 128}; |
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95 const int16 sfb_16_120[] = |
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96 { 4, 8, 12, 16, 20, 24, 28, 32, 40, 48, 60, 72, 88, 108, 120}; |
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97 |
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98 const int16 sfb_8_1024[] = { |
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99 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 172, 188, 204, 220, |
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100 236, 252, 268, 288, 308, 328, 348, 372, 396, 420, 448, 476, 508, 544, 580, |
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101 620, 664, 712, 764, 820, 880, 944, 1024}; |
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102 const int16 sfb_8_960[] = |
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103 { 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 172, 188, 204, |
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104 220, 236, 252, 268, 288, 308, 328, 348, 372, 396, 420, 448, 476, 508, 544, |
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105 580, 620, 664, 712, 764, 820, 880, 944, 960}; |
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106 |
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107 const int16 sfb_8_128[] = |
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108 { 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 128}; |
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109 const int16 sfb_8_120[] = |
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110 { 4, 8, 12, 16, 20, 24, 28, 36, 44, 52, 60, 72, 88, 108, 120}; |
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111 |
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112 /* |
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113 Purpose: Block parameters for each sampling rate. |
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114 Explanation: - */ |
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115 const SR_Info AAC_sampleRateInfo[(1 << LEN_SAMP_IDX)] = { |
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116 |
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117 /* 96000 */ |
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118 {96000, 41, sfb_96_1024, 12, sfb_96_128, 40, sfb_96_1024, 12, sfb_96_120}, |
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119 |
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120 /* 88200 */ |
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121 {88200, 41, sfb_96_1024, 12, sfb_96_128, 40, sfb_96_1024, 12, sfb_96_120}, |
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122 |
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123 /* 64000 */ |
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124 {64000, 47, sfb_64_1024, 12, sfb_64_128, 46, sfb_64_960, 12, sfb_64_120}, |
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125 |
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126 /* 48000 */ |
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127 {48000, 49, sfb_48_1024, 14, sfb_48_128, 49, sfb_48_960, 14, sfb_48_120}, |
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128 |
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129 /* 44100 */ |
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130 {44100, 49, sfb_48_1024, 14, sfb_48_128, 49, sfb_48_960, 14, sfb_48_120}, |
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131 |
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132 /* 32000 */ |
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133 {32000, 51, sfb_32_1024, 14, sfb_48_128, 49, sfb_32_960, 14, sfb_48_120}, |
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134 |
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135 /* 24000 */ |
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136 {24000, 47, sfb_24_1024, 15, sfb_24_128, 46, sfb_24_1024, 15, sfb_24_120}, |
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137 |
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138 /* 22050 */ |
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139 {22050, 47, sfb_24_1024, 15, sfb_24_128, 46, sfb_24_1024, 15, sfb_24_120}, |
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140 |
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141 /* 16000 */ |
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142 {16000, 43, sfb_16_1024, 15, sfb_16_128, 42, sfb_16_1024, 15, sfb_16_120}, |
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143 |
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144 /* 12000 */ |
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145 {12000, 43, sfb_16_1024, 15, sfb_16_128, 42, sfb_16_1024, 15, sfb_16_120}, |
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146 |
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147 /* 11025 */ |
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148 {11025, 43, sfb_16_1024, 15, sfb_16_128, 42, sfb_16_1024, 15, sfb_16_120}, |
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149 |
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150 /* 8000 */ |
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151 { 8000, 40, sfb_8_1024, 15, sfb_8_128, 40, sfb_8_960, 15, sfb_8_120}, |
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152 |
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153 {0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0}}; |
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154 |
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155 /* |
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156 * Retrieves AAC sample rate corresponding to the specified sample rate index. |
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157 */ |
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158 int32 |
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159 AACSampleRate(uint8 sampleRateIdx) |
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160 { |
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161 int32 sampleRate = 0; |
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162 |
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163 if(sampleRateIdx > 0 && sampleRateIdx < 12) |
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164 sampleRate = AAC_sampleRateInfo[sampleRateIdx].samp_rate; |
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165 |
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166 return (sampleRate); |
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167 } |
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168 |
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169 /* |
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170 * Initializes SFB and sample rate tables for the specified AAC encoder. |
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171 */ |
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172 void |
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173 AACSfbInfoInit(CSfb_Info *sfb, uint8 sIndex, uint8 is960) |
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174 { |
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175 CInfo *ip; |
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176 const SR_Info *sip; |
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177 const int16 *sfbands; |
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178 int16 i, j, k, n, ws; |
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179 |
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180 sip = &AAC_sampleRateInfo[sIndex]; |
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181 |
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182 /*-- Long block info. --*/ |
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183 ip = sfb->only_long_info; |
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184 sfb->winmap[ONLY_LONG_WND] = ip; |
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185 |
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186 ip->nsbk = 1; |
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187 ip->islong = 1; |
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188 ip->bins_per_bk = (int16) ((is960) ? LN2_960 : LN2); |
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189 for(i = 0; i < ip->nsbk; i++) |
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190 { |
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191 if(is960) |
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192 { |
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193 ip->sfb_per_sbk[i] = sip->nsfb960; |
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194 ip->sbk_sfb_top[i] = sip->SFbands960; |
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195 } |
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196 else |
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197 { |
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198 ip->sfb_per_sbk[i] = sip->nsfb1024; |
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199 ip->sbk_sfb_top[i] = sip->SFbands1024; |
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200 } |
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201 } |
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202 ip->sfb_width_128 = NULL; |
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203 ip->num_groups = 1; |
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204 ip->group_len[0] = 1; |
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205 ip->group_offs[0] = 0; |
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206 |
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207 /*-- Short block info. --*/ |
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208 ip = sfb->eight_short_info; |
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209 sfb->winmap[ONLY_SHORT_WND] = ip; |
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210 |
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211 ip->islong = 0; |
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212 ip->nsbk = NSHORT; |
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213 ip->bins_per_bk = (int16) ((is960) ? LN2_960 : LN2); |
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214 for(i = 0; i < ip->nsbk; i++) |
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215 { |
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216 if(is960) |
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217 { |
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218 ip->sfb_per_sbk[i] = sip->nsfb120; |
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219 ip->sbk_sfb_top[i] = sip->SFbands120; |
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220 } |
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221 else |
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222 { |
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223 ip->sfb_per_sbk[i] = sip->nsfb128; |
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224 ip->sbk_sfb_top[i] = sip->SFbands128; |
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225 } |
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226 } |
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227 |
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228 /*-- Construct sfb width table. --*/ |
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229 ip->sfb_width_128 = sfb->sfbwidth128; |
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230 for(i = 0, j = 0, n = ip->sfb_per_sbk[0]; i < n; i++) |
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231 { |
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232 k = ip->sbk_sfb_top[0][i]; |
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233 ip->sfb_width_128[i] = (int16) (k - j); |
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234 j = k; |
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235 } |
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236 |
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237 /*-- Common to long and short. --*/ |
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238 for(ws = 0; ws < NUM_WIN_SEQ; ws++) |
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239 { |
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240 if(ws == 1 || ws == 3) |
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241 continue; |
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242 |
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243 ip = sfb->winmap[ws]; |
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244 ip->sfb_per_bk = 0; |
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245 for(i = 0, k= 0, n = 0; i < ip->nsbk; i++) |
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246 { |
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247 /*-- Compute bins_per_sbk. --*/ |
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248 ip->bins_per_sbk[i] = (int16) (ip->bins_per_bk / ip->nsbk); |
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249 |
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250 /*-- Compute sfb_per_bk. --*/ |
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251 ip->sfb_per_bk = (int16) (ip->sfb_per_bk + ip->sfb_per_sbk[i]); |
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252 |
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253 /*-- Construct default (non-interleaved) bk_sfb_top[]. --*/ |
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254 sfbands = ip->sbk_sfb_top[i]; |
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255 for(j = 0; j < ip->sfb_per_sbk[i]; j++) |
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256 ip->bk_sfb_top[j + k] = (int16) (sfbands[j] + n); |
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257 |
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258 n = (int16) (n + ip->bins_per_sbk[i]); |
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259 k = (int16) (k + ip->sfb_per_sbk[i]); |
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260 } |
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261 } |
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262 |
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263 sfb->winmap[1] = sfb->winmap[ONLY_LONG_WND]; |
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264 sfb->winmap[3] = sfb->winmap[ONLY_LONG_WND]; |
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265 } |
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