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562
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1 /*
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2 tabinit.c: initialize tables...
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3
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4 copyright ?-2008 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.org
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6 initially written by Michael Hipp
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7 */
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8
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9 #include "mpg123lib_intern.h"
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10 #include "debug.h"
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11
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12 /* All optimizations share this code - with the exception of MMX */
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13 #ifndef OPT_MMX_ONLY
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14 /* that altivec alignment part here should not hurt generic code, I hope */
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15 #ifdef OPT_ALTIVEC
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16 static ALIGNED(16) real cos64[16];
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17 static ALIGNED(16) real cos32[8];
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18 static ALIGNED(16) real cos16[4];
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19 static ALIGNED(16) real cos8[2];
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20 static ALIGNED(16) real cos4[1];
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21 #else
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22 static real cos64[16],cos32[8],cos16[4],cos8[2],cos4[1];
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23 #endif
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24
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25 real *pnts[] = { cos64,cos32,cos16,cos8,cos4 };
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26
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27
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28 static long intwinbase[] = {
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29 0, -1, -1, -1, -1, -1, -1, -2, -2, -2,
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30 -2, -3, -3, -4, -4, -5, -5, -6, -7, -7,
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31 -8, -9, -10, -11, -13, -14, -16, -17, -19, -21,
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32 -24, -26, -29, -31, -35, -38, -41, -45, -49, -53,
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33 -58, -63, -68, -73, -79, -85, -91, -97, -104, -111,
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34 -117, -125, -132, -139, -147, -154, -161, -169, -176, -183,
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35 -190, -196, -202, -208, -213, -218, -222, -225, -227, -228,
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36 -228, -227, -224, -221, -215, -208, -200, -189, -177, -163,
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37 -146, -127, -106, -83, -57, -29, 2, 36, 72, 111,
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38 153, 197, 244, 294, 347, 401, 459, 519, 581, 645,
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39 711, 779, 848, 919, 991, 1064, 1137, 1210, 1283, 1356,
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40 1428, 1498, 1567, 1634, 1698, 1759, 1817, 1870, 1919, 1962,
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41 2001, 2032, 2057, 2075, 2085, 2087, 2080, 2063, 2037, 2000,
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42 1952, 1893, 1822, 1739, 1644, 1535, 1414, 1280, 1131, 970,
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43 794, 605, 402, 185, -45, -288, -545, -814, -1095, -1388,
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44 -1692, -2006, -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788,
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45 -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, -7910, -8209,
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46 -8491, -8755, -8998, -9219, -9416, -9585, -9727, -9838, -9916, -9959,
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47 -9966, -9935, -9863, -9750, -9592, -9389, -9139, -8840, -8492, -8092,
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48 -7640, -7134, -6574, -5959, -5288, -4561, -3776, -2935, -2037, -1082,
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49 -70, 998, 2122, 3300, 4533, 5818, 7154, 8540, 9975, 11455,
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50 12980, 14548, 16155, 17799, 19478, 21189, 22929, 24694, 26482, 28289,
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51 30112, 31947, 33791, 35640, 37489, 39336, 41176, 43006, 44821, 46617,
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52 48390, 50137, 51853, 53534, 55178, 56778, 58333, 59838, 61289, 62684,
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53 64019, 65290, 66494, 67629, 68692, 69679, 70590, 71420, 72169, 72835,
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54 73415, 73908, 74313, 74630, 74856, 74992, 75038 };
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55
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56 void prepare_decode_tables()
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57 {
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58 int i,k,kr,divv;
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59 real *costab;
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60
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61 for(i=0;i<5;i++)
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62 {
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63 kr=0x10>>i; divv=0x40>>i;
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64 costab = pnts[i];
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65 for(k=0;k<kr;k++)
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66 costab[k] = DOUBLE_TO_REAL(1.0 / (2.0 * cos(M_PI * ((double) k * 2.0 + 1.0) / (double) divv)));
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67 }
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68 }
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69 #endif
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70
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71 #ifdef OPT_MMXORSSE
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72 void make_decode_tables_mmx(mpg123_handle *fr)
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73 {
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74 debug("MMX decode tables");
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75 make_decode_tables_mmx_asm((fr->lastscale < 0 ? fr->p.outscale : fr->lastscale), fr->decwin_mmx, fr->decwins);
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76 debug("MMX decode tables done");
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77 }
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78 #endif
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79
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80 #ifndef OPT_MMX_ONLY
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81 void make_decode_tables(mpg123_handle *fr)
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82 {
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83 int i,j;
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84 int idx = 0;
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85 scale_t scaleval = -(fr->lastscale < 0 ? fr->p.outscale : fr->lastscale);
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86 debug("MMX decode tables");
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87 for(i=0,j=0;i<256;i++,j++,idx+=32)
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88 {
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89 if(idx < 512+16)
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90 fr->decwin[idx+16] = fr->decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) scaleval);
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91
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92 if(i % 32 == 31)
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93 idx -= 1023;
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94 if(i % 64 == 63)
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95 scaleval = - scaleval;
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96 }
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97
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98 for( /* i=256 */ ;i<512;i++,j--,idx+=32)
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99 {
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100 if(idx < 512+16)
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101 fr->decwin[idx+16] = fr->decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) scaleval);
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102
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103 if(i % 32 == 31)
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104 idx -= 1023;
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105 if(i % 64 == 63)
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106 scaleval = - scaleval;
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107 }
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108 debug("MMX decode tables done");
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109 }
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110 #endif
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111
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112 int make_conv16to8_table(mpg123_handle *fr)
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113 {
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114 int i;
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115 int mode = fr->af.encoding;
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116
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117 /*
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118 * ????: 8.0 is right but on SB cards '2.0' is a better value ???
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119 */
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120 const double mul = 8.0;
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121
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122 if(!fr->conv16to8_buf){
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123 fr->conv16to8_buf = (unsigned char *) malloc(8192);
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124 if(!fr->conv16to8_buf) {
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125 fr->err = MPG123_ERR_16TO8TABLE;
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126 if(NOQUIET) error("Can't allocate 16 to 8 converter table!");
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127 return -1;
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128 }
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129 fr->conv16to8 = fr->conv16to8_buf + 4096;
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130 }
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131
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132 if(fr->af.encoding == MPG123_ENC_ULAW_8){
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133 double m=127.0 / log(256.0);
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134 int c1;
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135
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136 for(i=-4096;i<4096;i++) {
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137 /* dunno whether this is a valid transformation rule ?!?!? */
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138 if(i < 0)
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139 c1 = 127 - (int) (log( 1.0 - 255.0 * (double) i*mul / 32768.0 ) * m);
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140 else
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141 c1 = 255 - (int) (log( 1.0 + 255.0 * (double) i*mul / 32768.0 ) * m);
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142 if((c1 < 0 || c1 > 255) && NOQUIET) error2("Converror %d %d",i,c1);
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143
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144 if(c1 == 0)
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145 c1 = 2;
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146 fr->conv16to8[i] = (unsigned char) c1;
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147 }
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148 }
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149 else if(mode == MPG123_ENC_SIGNED_8) {
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150 for(i=-4096;i<4096;i++) {
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151 fr->conv16to8[i] = i>>5;
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152 }
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153 }
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154 else if(mode == MPG123_ENC_UNSIGNED_8) {
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155 for(i=-4096;i<4096;i++) {
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156 fr->conv16to8[i] = (i>>5)+128;
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157 }
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158 }
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159 else {
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160 for(i=-4096;i<4096;i++) {
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161 fr->conv16to8[i] = 0;
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162 }
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163 }
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164 return 0;
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165 }
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166
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