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576 | serge | 1 | /* |
2 | dct64_i386.c: DCT64, a C variant for i386 |
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3 | |||
4 | copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1 |
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5 | see COPYING and AUTHORS files in distribution or http://mpg123.de |
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6 | initially written by Michael Hipp |
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7 | */ |
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8 | |||
9 | /* |
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10 | * Discrete Cosine Tansform (DCT) for subband synthesis |
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11 | * optimized for machines with no auto-increment. |
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12 | * The performance is highly compiler dependend. Maybe |
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13 | * the dct64.c version for 'normal' processor may be faster |
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14 | * even for Intel processors. |
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15 | */ |
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16 | |||
17 | //#include "config.h" |
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18 | #include "mpg123.h" |
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19 | |||
20 | static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples) |
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21 | { |
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22 | { |
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23 | register real *costab = pnts[0]; |
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24 | |||
25 | b1[0x00] = samples[0x00] + samples[0x1F]; |
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26 | b1[0x01] = samples[0x01] + samples[0x1E]; |
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27 | b1[0x1F] = (samples[0x00] - samples[0x1F]) * costab[0x0]; |
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28 | b1[0x1E] = (samples[0x01] - samples[0x1E]) * costab[0x1]; |
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29 | |||
30 | b1[0x02] = samples[0x02] + samples[0x1D]; |
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31 | b1[0x03] = samples[0x03] + samples[0x1C]; |
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32 | b1[0x1D] = (samples[0x02] - samples[0x1D]) * costab[0x2]; |
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33 | b1[0x1C] = (samples[0x03] - samples[0x1C]) * costab[0x3]; |
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34 | |||
35 | b1[0x04] = samples[0x04] + samples[0x1B]; |
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36 | b1[0x05] = samples[0x05] + samples[0x1A]; |
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37 | b1[0x1B] = (samples[0x04] - samples[0x1B]) * costab[0x4]; |
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38 | b1[0x1A] = (samples[0x05] - samples[0x1A]) * costab[0x5]; |
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39 | |||
40 | b1[0x06] = samples[0x06] + samples[0x19]; |
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41 | b1[0x07] = samples[0x07] + samples[0x18]; |
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42 | b1[0x19] = (samples[0x06] - samples[0x19]) * costab[0x6]; |
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43 | b1[0x18] = (samples[0x07] - samples[0x18]) * costab[0x7]; |
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44 | |||
45 | b1[0x08] = samples[0x08] + samples[0x17]; |
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46 | b1[0x09] = samples[0x09] + samples[0x16]; |
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47 | b1[0x17] = (samples[0x08] - samples[0x17]) * costab[0x8]; |
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48 | b1[0x16] = (samples[0x09] - samples[0x16]) * costab[0x9]; |
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49 | |||
50 | b1[0x0A] = samples[0x0A] + samples[0x15]; |
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51 | b1[0x0B] = samples[0x0B] + samples[0x14]; |
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52 | b1[0x15] = (samples[0x0A] - samples[0x15]) * costab[0xA]; |
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53 | b1[0x14] = (samples[0x0B] - samples[0x14]) * costab[0xB]; |
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54 | |||
55 | b1[0x0C] = samples[0x0C] + samples[0x13]; |
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56 | b1[0x0D] = samples[0x0D] + samples[0x12]; |
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57 | b1[0x13] = (samples[0x0C] - samples[0x13]) * costab[0xC]; |
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58 | b1[0x12] = (samples[0x0D] - samples[0x12]) * costab[0xD]; |
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59 | |||
60 | b1[0x0E] = samples[0x0E] + samples[0x11]; |
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61 | b1[0x0F] = samples[0x0F] + samples[0x10]; |
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62 | b1[0x11] = (samples[0x0E] - samples[0x11]) * costab[0xE]; |
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63 | b1[0x10] = (samples[0x0F] - samples[0x10]) * costab[0xF]; |
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64 | |||
65 | } |
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66 | |||
67 | |||
68 | { |
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69 | register real *costab = pnts[1]; |
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70 | |||
71 | b2[0x00] = b1[0x00] + b1[0x0F]; |
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72 | b2[0x01] = b1[0x01] + b1[0x0E]; |
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73 | b2[0x0F] = (b1[0x00] - b1[0x0F]) * costab[0]; |
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74 | b2[0x0E] = (b1[0x01] - b1[0x0E]) * costab[1]; |
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75 | |||
76 | b2[0x02] = b1[0x02] + b1[0x0D]; |
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77 | b2[0x03] = b1[0x03] + b1[0x0C]; |
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78 | b2[0x0D] = (b1[0x02] - b1[0x0D]) * costab[2]; |
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79 | b2[0x0C] = (b1[0x03] - b1[0x0C]) * costab[3]; |
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80 | |||
81 | b2[0x04] = b1[0x04] + b1[0x0B]; |
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82 | b2[0x05] = b1[0x05] + b1[0x0A]; |
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83 | b2[0x0B] = (b1[0x04] - b1[0x0B]) * costab[4]; |
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84 | b2[0x0A] = (b1[0x05] - b1[0x0A]) * costab[5]; |
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85 | |||
86 | b2[0x06] = b1[0x06] + b1[0x09]; |
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87 | b2[0x07] = b1[0x07] + b1[0x08]; |
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88 | b2[0x09] = (b1[0x06] - b1[0x09]) * costab[6]; |
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89 | b2[0x08] = (b1[0x07] - b1[0x08]) * costab[7]; |
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90 | |||
91 | /* */ |
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92 | |||
93 | b2[0x10] = b1[0x10] + b1[0x1F]; |
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94 | b2[0x11] = b1[0x11] + b1[0x1E]; |
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95 | b2[0x1F] = (b1[0x1F] - b1[0x10]) * costab[0]; |
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96 | b2[0x1E] = (b1[0x1E] - b1[0x11]) * costab[1]; |
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97 | |||
98 | b2[0x12] = b1[0x12] + b1[0x1D]; |
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99 | b2[0x13] = b1[0x13] + b1[0x1C]; |
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100 | b2[0x1D] = (b1[0x1D] - b1[0x12]) * costab[2]; |
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101 | b2[0x1C] = (b1[0x1C] - b1[0x13]) * costab[3]; |
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102 | |||
103 | b2[0x14] = b1[0x14] + b1[0x1B]; |
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104 | b2[0x15] = b1[0x15] + b1[0x1A]; |
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105 | b2[0x1B] = (b1[0x1B] - b1[0x14]) * costab[4]; |
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106 | b2[0x1A] = (b1[0x1A] - b1[0x15]) * costab[5]; |
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107 | |||
108 | b2[0x16] = b1[0x16] + b1[0x19]; |
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109 | b2[0x17] = b1[0x17] + b1[0x18]; |
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110 | b2[0x19] = (b1[0x19] - b1[0x16]) * costab[6]; |
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111 | b2[0x18] = (b1[0x18] - b1[0x17]) * costab[7]; |
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112 | } |
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113 | |||
114 | { |
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115 | register real *costab = pnts[2]; |
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116 | |||
117 | b1[0x00] = b2[0x00] + b2[0x07]; |
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118 | b1[0x07] = (b2[0x00] - b2[0x07]) * costab[0]; |
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119 | b1[0x01] = b2[0x01] + b2[0x06]; |
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120 | b1[0x06] = (b2[0x01] - b2[0x06]) * costab[1]; |
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121 | b1[0x02] = b2[0x02] + b2[0x05]; |
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122 | b1[0x05] = (b2[0x02] - b2[0x05]) * costab[2]; |
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123 | b1[0x03] = b2[0x03] + b2[0x04]; |
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124 | b1[0x04] = (b2[0x03] - b2[0x04]) * costab[3]; |
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125 | |||
126 | b1[0x08] = b2[0x08] + b2[0x0F]; |
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127 | b1[0x0F] = (b2[0x0F] - b2[0x08]) * costab[0]; |
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128 | b1[0x09] = b2[0x09] + b2[0x0E]; |
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129 | b1[0x0E] = (b2[0x0E] - b2[0x09]) * costab[1]; |
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130 | b1[0x0A] = b2[0x0A] + b2[0x0D]; |
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131 | b1[0x0D] = (b2[0x0D] - b2[0x0A]) * costab[2]; |
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132 | b1[0x0B] = b2[0x0B] + b2[0x0C]; |
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133 | b1[0x0C] = (b2[0x0C] - b2[0x0B]) * costab[3]; |
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134 | |||
135 | b1[0x10] = b2[0x10] + b2[0x17]; |
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136 | b1[0x17] = (b2[0x10] - b2[0x17]) * costab[0]; |
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137 | b1[0x11] = b2[0x11] + b2[0x16]; |
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138 | b1[0x16] = (b2[0x11] - b2[0x16]) * costab[1]; |
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139 | b1[0x12] = b2[0x12] + b2[0x15]; |
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140 | b1[0x15] = (b2[0x12] - b2[0x15]) * costab[2]; |
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141 | b1[0x13] = b2[0x13] + b2[0x14]; |
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142 | b1[0x14] = (b2[0x13] - b2[0x14]) * costab[3]; |
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143 | |||
144 | b1[0x18] = b2[0x18] + b2[0x1F]; |
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145 | b1[0x1F] = (b2[0x1F] - b2[0x18]) * costab[0]; |
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146 | b1[0x19] = b2[0x19] + b2[0x1E]; |
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147 | b1[0x1E] = (b2[0x1E] - b2[0x19]) * costab[1]; |
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148 | b1[0x1A] = b2[0x1A] + b2[0x1D]; |
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149 | b1[0x1D] = (b2[0x1D] - b2[0x1A]) * costab[2]; |
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150 | b1[0x1B] = b2[0x1B] + b2[0x1C]; |
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151 | b1[0x1C] = (b2[0x1C] - b2[0x1B]) * costab[3]; |
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152 | } |
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153 | |||
154 | { |
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155 | register real const cos0 = pnts[3][0]; |
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156 | register real const cos1 = pnts[3][1]; |
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157 | |||
158 | b2[0x00] = b1[0x00] + b1[0x03]; |
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159 | b2[0x03] = (b1[0x00] - b1[0x03]) * cos0; |
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160 | b2[0x01] = b1[0x01] + b1[0x02]; |
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161 | b2[0x02] = (b1[0x01] - b1[0x02]) * cos1; |
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162 | |||
163 | b2[0x04] = b1[0x04] + b1[0x07]; |
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164 | b2[0x07] = (b1[0x07] - b1[0x04]) * cos0; |
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165 | b2[0x05] = b1[0x05] + b1[0x06]; |
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166 | b2[0x06] = (b1[0x06] - b1[0x05]) * cos1; |
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167 | |||
168 | b2[0x08] = b1[0x08] + b1[0x0B]; |
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169 | b2[0x0B] = (b1[0x08] - b1[0x0B]) * cos0; |
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170 | b2[0x09] = b1[0x09] + b1[0x0A]; |
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171 | b2[0x0A] = (b1[0x09] - b1[0x0A]) * cos1; |
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172 | |||
173 | b2[0x0C] = b1[0x0C] + b1[0x0F]; |
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174 | b2[0x0F] = (b1[0x0F] - b1[0x0C]) * cos0; |
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175 | b2[0x0D] = b1[0x0D] + b1[0x0E]; |
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176 | b2[0x0E] = (b1[0x0E] - b1[0x0D]) * cos1; |
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177 | |||
178 | b2[0x10] = b1[0x10] + b1[0x13]; |
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179 | b2[0x13] = (b1[0x10] - b1[0x13]) * cos0; |
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180 | b2[0x11] = b1[0x11] + b1[0x12]; |
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181 | b2[0x12] = (b1[0x11] - b1[0x12]) * cos1; |
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182 | |||
183 | b2[0x14] = b1[0x14] + b1[0x17]; |
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184 | b2[0x17] = (b1[0x17] - b1[0x14]) * cos0; |
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185 | b2[0x15] = b1[0x15] + b1[0x16]; |
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186 | b2[0x16] = (b1[0x16] - b1[0x15]) * cos1; |
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187 | |||
188 | b2[0x18] = b1[0x18] + b1[0x1B]; |
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189 | b2[0x1B] = (b1[0x18] - b1[0x1B]) * cos0; |
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190 | b2[0x19] = b1[0x19] + b1[0x1A]; |
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191 | b2[0x1A] = (b1[0x19] - b1[0x1A]) * cos1; |
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192 | |||
193 | b2[0x1C] = b1[0x1C] + b1[0x1F]; |
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194 | b2[0x1F] = (b1[0x1F] - b1[0x1C]) * cos0; |
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195 | b2[0x1D] = b1[0x1D] + b1[0x1E]; |
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196 | b2[0x1E] = (b1[0x1E] - b1[0x1D]) * cos1; |
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197 | } |
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198 | |||
199 | { |
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200 | register real const cos0 = pnts[4][0]; |
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201 | |||
202 | b1[0x00] = b2[0x00] + b2[0x01]; |
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203 | b1[0x01] = (b2[0x00] - b2[0x01]) * cos0; |
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204 | b1[0x02] = b2[0x02] + b2[0x03]; |
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205 | b1[0x03] = (b2[0x03] - b2[0x02]) * cos0; |
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206 | b1[0x02] += b1[0x03]; |
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207 | |||
208 | b1[0x04] = b2[0x04] + b2[0x05]; |
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209 | b1[0x05] = (b2[0x04] - b2[0x05]) * cos0; |
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210 | b1[0x06] = b2[0x06] + b2[0x07]; |
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211 | b1[0x07] = (b2[0x07] - b2[0x06]) * cos0; |
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212 | b1[0x06] += b1[0x07]; |
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213 | b1[0x04] += b1[0x06]; |
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214 | b1[0x06] += b1[0x05]; |
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215 | b1[0x05] += b1[0x07]; |
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216 | |||
217 | b1[0x08] = b2[0x08] + b2[0x09]; |
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218 | b1[0x09] = (b2[0x08] - b2[0x09]) * cos0; |
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219 | b1[0x0A] = b2[0x0A] + b2[0x0B]; |
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220 | b1[0x0B] = (b2[0x0B] - b2[0x0A]) * cos0; |
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221 | b1[0x0A] += b1[0x0B]; |
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222 | |||
223 | b1[0x0C] = b2[0x0C] + b2[0x0D]; |
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224 | b1[0x0D] = (b2[0x0C] - b2[0x0D]) * cos0; |
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225 | b1[0x0E] = b2[0x0E] + b2[0x0F]; |
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226 | b1[0x0F] = (b2[0x0F] - b2[0x0E]) * cos0; |
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227 | b1[0x0E] += b1[0x0F]; |
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228 | b1[0x0C] += b1[0x0E]; |
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229 | b1[0x0E] += b1[0x0D]; |
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230 | b1[0x0D] += b1[0x0F]; |
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231 | |||
232 | b1[0x10] = b2[0x10] + b2[0x11]; |
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233 | b1[0x11] = (b2[0x10] - b2[0x11]) * cos0; |
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234 | b1[0x12] = b2[0x12] + b2[0x13]; |
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235 | b1[0x13] = (b2[0x13] - b2[0x12]) * cos0; |
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236 | b1[0x12] += b1[0x13]; |
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237 | |||
238 | b1[0x14] = b2[0x14] + b2[0x15]; |
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239 | b1[0x15] = (b2[0x14] - b2[0x15]) * cos0; |
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240 | b1[0x16] = b2[0x16] + b2[0x17]; |
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241 | b1[0x17] = (b2[0x17] - b2[0x16]) * cos0; |
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242 | b1[0x16] += b1[0x17]; |
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243 | b1[0x14] += b1[0x16]; |
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244 | b1[0x16] += b1[0x15]; |
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245 | b1[0x15] += b1[0x17]; |
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246 | |||
247 | b1[0x18] = b2[0x18] + b2[0x19]; |
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248 | b1[0x19] = (b2[0x18] - b2[0x19]) * cos0; |
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249 | b1[0x1A] = b2[0x1A] + b2[0x1B]; |
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250 | b1[0x1B] = (b2[0x1B] - b2[0x1A]) * cos0; |
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251 | b1[0x1A] += b1[0x1B]; |
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252 | |||
253 | b1[0x1C] = b2[0x1C] + b2[0x1D]; |
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254 | b1[0x1D] = (b2[0x1C] - b2[0x1D]) * cos0; |
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255 | b1[0x1E] = b2[0x1E] + b2[0x1F]; |
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256 | b1[0x1F] = (b2[0x1F] - b2[0x1E]) * cos0; |
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257 | b1[0x1E] += b1[0x1F]; |
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258 | b1[0x1C] += b1[0x1E]; |
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259 | b1[0x1E] += b1[0x1D]; |
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260 | b1[0x1D] += b1[0x1F]; |
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261 | } |
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262 | |||
263 | out0[0x10*16] = b1[0x00]; |
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264 | out0[0x10*12] = b1[0x04]; |
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265 | out0[0x10* 8] = b1[0x02]; |
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266 | out0[0x10* 4] = b1[0x06]; |
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267 | out0[0x10* 0] = b1[0x01]; |
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268 | out1[0x10* 0] = b1[0x01]; |
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269 | out1[0x10* 4] = b1[0x05]; |
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270 | out1[0x10* 8] = b1[0x03]; |
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271 | out1[0x10*12] = b1[0x07]; |
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272 | |||
273 | #if 1 |
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274 | out0[0x10*14] = b1[0x08] + b1[0x0C]; |
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275 | out0[0x10*10] = b1[0x0C] + b1[0x0a]; |
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276 | out0[0x10* 6] = b1[0x0A] + b1[0x0E]; |
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277 | out0[0x10* 2] = b1[0x0E] + b1[0x09]; |
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278 | out1[0x10* 2] = b1[0x09] + b1[0x0D]; |
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279 | out1[0x10* 6] = b1[0x0D] + b1[0x0B]; |
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280 | out1[0x10*10] = b1[0x0B] + b1[0x0F]; |
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281 | out1[0x10*14] = b1[0x0F]; |
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282 | #else |
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283 | b1[0x08] += b1[0x0C]; |
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284 | out0[0x10*14] = b1[0x08]; |
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285 | b1[0x0C] += b1[0x0a]; |
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286 | out0[0x10*10] = b1[0x0C]; |
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287 | b1[0x0A] += b1[0x0E]; |
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288 | out0[0x10* 6] = b1[0x0A]; |
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289 | b1[0x0E] += b1[0x09]; |
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290 | out0[0x10* 2] = b1[0x0E]; |
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291 | b1[0x09] += b1[0x0D]; |
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292 | out1[0x10* 2] = b1[0x09]; |
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293 | b1[0x0D] += b1[0x0B]; |
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294 | out1[0x10* 6] = b1[0x0D]; |
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295 | b1[0x0B] += b1[0x0F]; |
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296 | out1[0x10*10] = b1[0x0B]; |
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297 | out1[0x10*14] = b1[0x0F]; |
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298 | #endif |
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299 | |||
300 | { |
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301 | real tmp; |
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302 | tmp = b1[0x18] + b1[0x1C]; |
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303 | out0[0x10*15] = tmp + b1[0x10]; |
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304 | out0[0x10*13] = tmp + b1[0x14]; |
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305 | tmp = b1[0x1C] + b1[0x1A]; |
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306 | out0[0x10*11] = tmp + b1[0x14]; |
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307 | out0[0x10* 9] = tmp + b1[0x12]; |
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308 | tmp = b1[0x1A] + b1[0x1E]; |
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309 | out0[0x10* 7] = tmp + b1[0x12]; |
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310 | out0[0x10* 5] = tmp + b1[0x16]; |
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311 | tmp = b1[0x1E] + b1[0x19]; |
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312 | out0[0x10* 3] = tmp + b1[0x16]; |
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313 | out0[0x10* 1] = tmp + b1[0x11]; |
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314 | tmp = b1[0x19] + b1[0x1D]; |
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315 | out1[0x10* 1] = tmp + b1[0x11]; |
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316 | out1[0x10* 3] = tmp + b1[0x15]; |
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317 | tmp = b1[0x1D] + b1[0x1B]; |
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318 | out1[0x10* 5] = tmp + b1[0x15]; |
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319 | out1[0x10* 7] = tmp + b1[0x13]; |
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320 | tmp = b1[0x1B] + b1[0x1F]; |
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321 | out1[0x10* 9] = tmp + b1[0x13]; |
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322 | out1[0x10*11] = tmp + b1[0x17]; |
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323 | out1[0x10*13] = b1[0x17] + b1[0x1F]; |
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324 | out1[0x10*15] = b1[0x1F]; |
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325 | } |
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326 | } |
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327 | |||
328 | /* |
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329 | * the call via dct64 is a trick to force GCC to use |
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330 | * (new) registers for the b1,b2 pointer to the bufs[xx] field |
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331 | */ |
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332 | void dct64(real *a,real *b,real *c) |
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333 | { |
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334 | real bufs[0x40]; |
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335 | dct64_1(a,b,bufs,bufs+0x20,c); |
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336 | } |
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337 |