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4349 | Serge | 1 | /* |
2 | * MPEG Audio common tables |
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3 | * copyright (c) 2002 Fabrice Bellard |
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4 | * |
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5 | * This file is part of FFmpeg. |
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6 | * |
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7 | * FFmpeg is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU Lesser General Public |
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9 | * License as published by the Free Software Foundation; either |
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10 | * version 2.1 of the License, or (at your option) any later version. |
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11 | * |
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12 | * FFmpeg is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * Lesser General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU Lesser General Public |
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18 | * License along with FFmpeg; if not, write to the Free Software |
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | */ |
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21 | |||
22 | /** |
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23 | * @file |
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24 | * mpeg audio layer common tables. |
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25 | */ |
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26 | |||
27 | #include "mpegaudiodata.h" |
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28 | |||
29 | |||
30 | const uint16_t avpriv_mpa_bitrate_tab[2][3][15] = { |
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31 | { {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448 }, |
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32 | {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384 }, |
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33 | {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 } }, |
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34 | { {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256}, |
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35 | {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160}, |
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36 | {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160} |
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37 | } |
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38 | }; |
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39 | |||
40 | const uint16_t avpriv_mpa_freq_tab[3] = { 44100, 48000, 32000 }; |
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41 | |||
42 | /*******************************************************/ |
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43 | /* layer 2 tables */ |
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44 | |||
45 | const int ff_mpa_sblimit_table[5] = { 27 , 30 , 8, 12 , 30 }; |
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46 | |||
47 | const int ff_mpa_quant_steps[17] = { |
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48 | 3, 5, 7, 9, 15, |
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49 | 31, 63, 127, 255, 511, |
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50 | 1023, 2047, 4095, 8191, 16383, |
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51 | 32767, 65535 |
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52 | }; |
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53 | |||
54 | /* we use a negative value if grouped */ |
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55 | const int ff_mpa_quant_bits[17] = { |
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56 | -5, -7, 3, -10, 4, |
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57 | 5, 6, 7, 8, 9, |
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58 | 10, 11, 12, 13, 14, |
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59 | 15, 16 |
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60 | }; |
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61 | |||
62 | /* encoding tables which give the quantization index. Note how it is |
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63 | possible to store them efficiently ! */ |
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64 | static const unsigned char alloc_table_1[] = { |
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65 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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66 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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67 | 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, |
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68 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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69 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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70 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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71 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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72 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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73 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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74 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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75 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, |
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76 | 3, 0, 1, 2, 3, 4, 5, 16, |
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77 | 3, 0, 1, 2, 3, 4, 5, 16, |
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78 | 3, 0, 1, 2, 3, 4, 5, 16, |
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79 | 3, 0, 1, 2, 3, 4, 5, 16, |
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80 | 3, 0, 1, 2, 3, 4, 5, 16, |
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81 | 3, 0, 1, 2, 3, 4, 5, 16, |
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82 | 3, 0, 1, 2, 3, 4, 5, 16, |
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83 | 3, 0, 1, 2, 3, 4, 5, 16, |
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84 | 3, 0, 1, 2, 3, 4, 5, 16, |
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85 | 3, 0, 1, 2, 3, 4, 5, 16, |
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86 | 3, 0, 1, 2, 3, 4, 5, 16, |
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87 | 3, 0, 1, 2, 3, 4, 5, 16, |
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88 | 2, 0, 1, 16, |
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89 | 2, 0, 1, 16, |
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90 | 2, 0, 1, 16, |
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91 | 2, 0, 1, 16, |
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92 | 2, 0, 1, 16, |
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93 | 2, 0, 1, 16, |
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94 | 2, 0, 1, 16, |
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95 | }; |
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96 | |||
97 | static const unsigned char alloc_table_3[] = { |
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98 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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99 | 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
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100 | 3, 0, 1, 3, 4, 5, 6, 7, |
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101 | 3, 0, 1, 3, 4, 5, 6, 7, |
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102 | 3, 0, 1, 3, 4, 5, 6, 7, |
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103 | 3, 0, 1, 3, 4, 5, 6, 7, |
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104 | 3, 0, 1, 3, 4, 5, 6, 7, |
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105 | 3, 0, 1, 3, 4, 5, 6, 7, |
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106 | 3, 0, 1, 3, 4, 5, 6, 7, |
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107 | 3, 0, 1, 3, 4, 5, 6, 7, |
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108 | 3, 0, 1, 3, 4, 5, 6, 7, |
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109 | 3, 0, 1, 3, 4, 5, 6, 7, |
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110 | }; |
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111 | |||
112 | static const unsigned char alloc_table_4[] = { |
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113 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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114 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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115 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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116 | 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
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117 | 3, 0, 1, 3, 4, 5, 6, 7, |
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118 | 3, 0, 1, 3, 4, 5, 6, 7, |
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119 | 3, 0, 1, 3, 4, 5, 6, 7, |
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120 | 3, 0, 1, 3, 4, 5, 6, 7, |
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121 | 3, 0, 1, 3, 4, 5, 6, 7, |
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122 | 3, 0, 1, 3, 4, 5, 6, 7, |
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123 | 3, 0, 1, 3, 4, 5, 6, 7, |
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124 | 2, 0, 1, 3, |
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125 | 2, 0, 1, 3, |
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126 | 2, 0, 1, 3, |
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127 | 2, 0, 1, 3, |
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128 | 2, 0, 1, 3, |
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129 | 2, 0, 1, 3, |
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130 | 2, 0, 1, 3, |
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131 | 2, 0, 1, 3, |
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132 | 2, 0, 1, 3, |
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133 | 2, 0, 1, 3, |
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134 | 2, 0, 1, 3, |
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135 | 2, 0, 1, 3, |
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136 | 2, 0, 1, 3, |
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137 | 2, 0, 1, 3, |
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138 | 2, 0, 1, 3, |
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139 | 2, 0, 1, 3, |
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140 | 2, 0, 1, 3, |
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141 | 2, 0, 1, 3, |
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142 | 2, 0, 1, 3, |
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143 | }; |
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144 | |||
145 | const unsigned char * const ff_mpa_alloc_tables[5] = |
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146 | { alloc_table_1, alloc_table_1, alloc_table_3, alloc_table_3, alloc_table_4, }; |