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Rev | Author | Line No. | Line |
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576 | serge | 1 | /* |
2 | tabinit.c: initialize tables... |
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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 | //#include |
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10 | |||
11 | //#include "config.h" |
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12 | #include "mpg123.h" |
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13 | //#include "debug.h" |
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14 | |||
15 | static unsigned char *conv16to8_buf = NULL; |
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16 | unsigned char *conv16to8; |
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17 | |||
18 | #ifndef USE_MMX |
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19 | real decwin[512+32]; |
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20 | #ifdef USE_ALTIVEC |
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21 | static real __attribute__ ((aligned (16))) cos64[16]; |
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22 | static real __attribute__ ((aligned (16))) cos32[8]; |
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23 | static real __attribute__ ((aligned (16))) cos16[4]; |
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24 | static real __attribute__ ((aligned (16))) cos8[2]; |
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25 | static real __attribute__ ((aligned (16))) cos4[1]; |
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26 | #else |
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27 | static real cos64[16],cos32[8],cos16[4],cos8[2],cos4[1]; |
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28 | #endif |
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29 | |||
30 | real *pnts[] = { cos64,cos32,cos16,cos8,cos4 }; |
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31 | |||
32 | |||
33 | static long intwinbase[] = { |
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34 | 0, -1, -1, -1, -1, -1, -1, -2, -2, -2, |
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35 | -2, -3, -3, -4, -4, -5, -5, -6, -7, -7, |
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36 | -8, -9, -10, -11, -13, -14, -16, -17, -19, -21, |
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37 | -24, -26, -29, -31, -35, -38, -41, -45, -49, -53, |
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38 | -58, -63, -68, -73, -79, -85, -91, -97, -104, -111, |
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39 | -117, -125, -132, -139, -147, -154, -161, -169, -176, -183, |
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40 | -190, -196, -202, -208, -213, -218, -222, -225, -227, -228, |
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41 | -228, -227, -224, -221, -215, -208, -200, -189, -177, -163, |
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42 | -146, -127, -106, -83, -57, -29, 2, 36, 72, 111, |
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43 | 153, 197, 244, 294, 347, 401, 459, 519, 581, 645, |
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44 | 711, 779, 848, 919, 991, 1064, 1137, 1210, 1283, 1356, |
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45 | 1428, 1498, 1567, 1634, 1698, 1759, 1817, 1870, 1919, 1962, |
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46 | 2001, 2032, 2057, 2075, 2085, 2087, 2080, 2063, 2037, 2000, |
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47 | 1952, 1893, 1822, 1739, 1644, 1535, 1414, 1280, 1131, 970, |
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48 | 794, 605, 402, 185, -45, -288, -545, -814, -1095, -1388, |
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49 | -1692, -2006, -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788, |
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50 | -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, -7910, -8209, |
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51 | -8491, -8755, -8998, -9219, -9416, -9585, -9727, -9838, -9916, -9959, |
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52 | -9966, -9935, -9863, -9750, -9592, -9389, -9139, -8840, -8492, -8092, |
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53 | -7640, -7134, -6574, -5959, -5288, -4561, -3776, -2935, -2037, -1082, |
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54 | -70, 998, 2122, 3300, 4533, 5818, 7154, 8540, 9975, 11455, |
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55 | 12980, 14548, 16155, 17799, 19478, 21189, 22929, 24694, 26482, 28289, |
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56 | 30112, 31947, 33791, 35640, 37489, 39336, 41176, 43006, 44821, 46617, |
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57 | 48390, 50137, 51853, 53534, 55178, 56778, 58333, 59838, 61289, 62684, |
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58 | 64019, 65290, 66494, 67629, 68692, 69679, 70590, 71420, 72169, 72835, |
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59 | 73415, 73908, 74313, 74630, 74856, 74992, 75038 }; |
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60 | |||
61 | #pragma warning(disable:4244) |
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62 | void make_decode_tables(long scaleval) |
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63 | { |
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64 | int i,j,k,kr,divv; |
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65 | real *costab; |
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66 | int idx; |
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67 | |||
68 | |||
69 | for(i=0;i<5;i++) |
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70 | { |
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71 | kr=0x10>>i; divv=0x40>>i; |
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72 | costab = pnts[i]; |
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73 | for(k=0;k |
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74 | costab[k] = DOUBLE_TO_REAL(1.0 / (2.0 * cos(M_PI * ((double) k * 2.0 + 1.0) / (double) divv))); |
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75 | |||
76 | } |
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77 | |||
78 | idx = 0; |
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79 | scaleval = -scaleval; |
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80 | for(i=0,j=0;i<256;i++,j++,idx+=32) |
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81 | { |
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82 | if(idx < 512+16) |
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83 | decwin[idx+16] = decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) scaleval); |
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84 | |||
85 | if(i % 32 == 31) |
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86 | idx -= 1023; |
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87 | if(i % 64 == 63) |
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88 | scaleval = - scaleval; |
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89 | } |
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90 | |||
91 | for( /* i=256 */ ;i<512;i++,j--,idx+=32) |
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92 | { |
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93 | if(idx < 512+16) |
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94 | decwin[idx+16] = decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) scaleval); |
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95 | |||
96 | if(i % 32 == 31) |
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97 | idx -= 1023; |
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98 | if(i % 64 == 63) |
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99 | scaleval = - scaleval; |
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100 | } |
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101 | } |
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102 | #endif |
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103 | |||
104 | #if 0 |
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105 | int make_conv16to8_table(int mode) |
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106 | { |
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107 | int i; |
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108 | |||
109 | /* |
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110 | * ????: 8.0 is right but on SB cards '2.0' is a better value ??? |
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111 | */ |
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112 | const double mul = 8.0; |
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113 | |||
114 | if(!conv16to8_buf) { |
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115 | conv16to8_buf = (unsigned char *) malloc(8192); |
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116 | if(!conv16to8_buf) { |
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117 | error("Can't allocate 16 to 8 converter table!"); |
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118 | return -1; |
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119 | } |
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120 | conv16to8 = conv16to8_buf + 4096; |
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121 | } |
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122 | |||
123 | if(mode == AUDIO_FORMAT_ULAW_8) { |
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124 | double m=127.0 / log(256.0); |
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125 | int c1; |
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126 | |||
127 | for(i=-4096;i<4096;i++) { |
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128 | /* dunno whether this is a valid transformation rule ?!?!? */ |
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129 | if(i < 0) |
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130 | c1 = 127 - (int) (log( 1.0 - 255.0 * (double) i*mul / 32768.0 ) * m); |
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131 | else |
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132 | c1 = 255 - (int) (log( 1.0 + 255.0 * (double) i*mul / 32768.0 ) * m); |
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133 | if(c1 < 0 || c1 > 255) |
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134 | fprintf(stderr,"Converror %d %d\n",i,c1); |
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135 | if(c1 == 0) |
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136 | c1 = 2; |
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137 | conv16to8[i] = (unsigned char) c1; |
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138 | } |
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139 | } |
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140 | else if(mode == AUDIO_FORMAT_SIGNED_8) { |
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141 | for(i=-4096;i<4096;i++) { |
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142 | conv16to8[i] = i>>5; |
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143 | } |
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144 | } |
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145 | else if(mode == AUDIO_FORMAT_UNSIGNED_8) { |
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146 | for(i=-4096;i<4096;i++) { |
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147 | conv16to8[i] = (i>>5)+128; |
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148 | } |
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149 | } |
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150 | else { |
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151 | for(i=-4096;i<4096;i++) { |
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152 | conv16to8[i] = 0; |
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153 | } |
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154 | } |
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155 | return 0; |
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156 | } |
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157 | |||
158 | |||
159 | #endif4096;i++)>4096;i++)>4096;i++)>>>4096;i++)>>512;i++,j--,idx+=32) |