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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1905 | 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.org |
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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 "mpg123lib_intern.h" |
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| 18 | |||
| 19 | static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples) |
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| 20 | { |
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| 21 | { |
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| 22 | register real *costab = pnts[0]; |
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| 23 | |||
| 24 | b1[0x00] = samples[0x00] + samples[0x1F]; |
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| 25 | b1[0x01] = samples[0x01] + samples[0x1E]; |
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| 26 | b1[0x1F] = REAL_MUL(samples[0x00] - samples[0x1F], costab[0x0]); |
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| 27 | b1[0x1E] = REAL_MUL(samples[0x01] - samples[0x1E], costab[0x1]); |
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| 28 | |||
| 29 | b1[0x02] = samples[0x02] + samples[0x1D]; |
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| 30 | b1[0x03] = samples[0x03] + samples[0x1C]; |
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| 31 | b1[0x1D] = REAL_MUL(samples[0x02] - samples[0x1D], costab[0x2]); |
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| 32 | b1[0x1C] = REAL_MUL(samples[0x03] - samples[0x1C], costab[0x3]); |
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| 33 | |||
| 34 | b1[0x04] = samples[0x04] + samples[0x1B]; |
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| 35 | b1[0x05] = samples[0x05] + samples[0x1A]; |
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| 36 | b1[0x1B] = REAL_MUL(samples[0x04] - samples[0x1B], costab[0x4]); |
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| 37 | b1[0x1A] = REAL_MUL(samples[0x05] - samples[0x1A], costab[0x5]); |
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| 38 | |||
| 39 | b1[0x06] = samples[0x06] + samples[0x19]; |
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| 40 | b1[0x07] = samples[0x07] + samples[0x18]; |
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| 41 | b1[0x19] = REAL_MUL(samples[0x06] - samples[0x19], costab[0x6]); |
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| 42 | b1[0x18] = REAL_MUL(samples[0x07] - samples[0x18], costab[0x7]); |
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| 43 | |||
| 44 | b1[0x08] = samples[0x08] + samples[0x17]; |
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| 45 | b1[0x09] = samples[0x09] + samples[0x16]; |
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| 46 | b1[0x17] = REAL_MUL(samples[0x08] - samples[0x17], costab[0x8]); |
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| 47 | b1[0x16] = REAL_MUL(samples[0x09] - samples[0x16], costab[0x9]); |
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| 48 | |||
| 49 | b1[0x0A] = samples[0x0A] + samples[0x15]; |
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| 50 | b1[0x0B] = samples[0x0B] + samples[0x14]; |
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| 51 | b1[0x15] = REAL_MUL(samples[0x0A] - samples[0x15], costab[0xA]); |
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| 52 | b1[0x14] = REAL_MUL(samples[0x0B] - samples[0x14], costab[0xB]); |
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| 53 | |||
| 54 | b1[0x0C] = samples[0x0C] + samples[0x13]; |
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| 55 | b1[0x0D] = samples[0x0D] + samples[0x12]; |
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| 56 | b1[0x13] = REAL_MUL(samples[0x0C] - samples[0x13], costab[0xC]); |
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| 57 | b1[0x12] = REAL_MUL(samples[0x0D] - samples[0x12], costab[0xD]); |
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| 58 | |||
| 59 | b1[0x0E] = samples[0x0E] + samples[0x11]; |
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| 60 | b1[0x0F] = samples[0x0F] + samples[0x10]; |
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| 61 | b1[0x11] = REAL_MUL(samples[0x0E] - samples[0x11], costab[0xE]); |
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| 62 | b1[0x10] = REAL_MUL(samples[0x0F] - samples[0x10], costab[0xF]); |
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| 63 | |||
| 64 | } |
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| 65 | |||
| 66 | |||
| 67 | { |
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| 68 | register real *costab = pnts[1]; |
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| 69 | |||
| 70 | b2[0x00] = b1[0x00] + b1[0x0F]; |
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| 71 | b2[0x01] = b1[0x01] + b1[0x0E]; |
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| 72 | b2[0x0F] = REAL_MUL(b1[0x00] - b1[0x0F], costab[0]); |
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| 73 | b2[0x0E] = REAL_MUL(b1[0x01] - b1[0x0E], costab[1]); |
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| 74 | |||
| 75 | b2[0x02] = b1[0x02] + b1[0x0D]; |
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| 76 | b2[0x03] = b1[0x03] + b1[0x0C]; |
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| 77 | b2[0x0D] = REAL_MUL(b1[0x02] - b1[0x0D], costab[2]); |
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| 78 | b2[0x0C] = REAL_MUL(b1[0x03] - b1[0x0C], costab[3]); |
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| 79 | |||
| 80 | b2[0x04] = b1[0x04] + b1[0x0B]; |
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| 81 | b2[0x05] = b1[0x05] + b1[0x0A]; |
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| 82 | b2[0x0B] = REAL_MUL(b1[0x04] - b1[0x0B], costab[4]); |
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| 83 | b2[0x0A] = REAL_MUL(b1[0x05] - b1[0x0A], costab[5]); |
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| 84 | |||
| 85 | b2[0x06] = b1[0x06] + b1[0x09]; |
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| 86 | b2[0x07] = b1[0x07] + b1[0x08]; |
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| 87 | b2[0x09] = REAL_MUL(b1[0x06] - b1[0x09], costab[6]); |
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| 88 | b2[0x08] = REAL_MUL(b1[0x07] - b1[0x08], costab[7]); |
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| 89 | |||
| 90 | /* */ |
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| 91 | |||
| 92 | b2[0x10] = b1[0x10] + b1[0x1F]; |
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| 93 | b2[0x11] = b1[0x11] + b1[0x1E]; |
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| 94 | b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x10], costab[0]); |
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| 95 | b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x11], costab[1]); |
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| 96 | |||
| 97 | b2[0x12] = b1[0x12] + b1[0x1D]; |
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| 98 | b2[0x13] = b1[0x13] + b1[0x1C]; |
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| 99 | b2[0x1D] = REAL_MUL(b1[0x1D] - b1[0x12], costab[2]); |
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| 100 | b2[0x1C] = REAL_MUL(b1[0x1C] - b1[0x13], costab[3]); |
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| 101 | |||
| 102 | b2[0x14] = b1[0x14] + b1[0x1B]; |
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| 103 | b2[0x15] = b1[0x15] + b1[0x1A]; |
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| 104 | b2[0x1B] = REAL_MUL(b1[0x1B] - b1[0x14], costab[4]); |
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| 105 | b2[0x1A] = REAL_MUL(b1[0x1A] - b1[0x15], costab[5]); |
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| 106 | |||
| 107 | b2[0x16] = b1[0x16] + b1[0x19]; |
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| 108 | b2[0x17] = b1[0x17] + b1[0x18]; |
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| 109 | b2[0x19] = REAL_MUL(b1[0x19] - b1[0x16], costab[6]); |
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| 110 | b2[0x18] = REAL_MUL(b1[0x18] - b1[0x17], costab[7]); |
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| 111 | } |
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| 112 | |||
| 113 | { |
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| 114 | register real *costab = pnts[2]; |
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| 115 | |||
| 116 | b1[0x00] = b2[0x00] + b2[0x07]; |
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| 117 | b1[0x07] = REAL_MUL(b2[0x00] - b2[0x07], costab[0]); |
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| 118 | b1[0x01] = b2[0x01] + b2[0x06]; |
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| 119 | b1[0x06] = REAL_MUL(b2[0x01] - b2[0x06], costab[1]); |
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| 120 | b1[0x02] = b2[0x02] + b2[0x05]; |
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| 121 | b1[0x05] = REAL_MUL(b2[0x02] - b2[0x05], costab[2]); |
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| 122 | b1[0x03] = b2[0x03] + b2[0x04]; |
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| 123 | b1[0x04] = REAL_MUL(b2[0x03] - b2[0x04], costab[3]); |
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| 124 | |||
| 125 | b1[0x08] = b2[0x08] + b2[0x0F]; |
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| 126 | b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x08], costab[0]); |
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| 127 | b1[0x09] = b2[0x09] + b2[0x0E]; |
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| 128 | b1[0x0E] = REAL_MUL(b2[0x0E] - b2[0x09], costab[1]); |
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| 129 | b1[0x0A] = b2[0x0A] + b2[0x0D]; |
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| 130 | b1[0x0D] = REAL_MUL(b2[0x0D] - b2[0x0A], costab[2]); |
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| 131 | b1[0x0B] = b2[0x0B] + b2[0x0C]; |
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| 132 | b1[0x0C] = REAL_MUL(b2[0x0C] - b2[0x0B], costab[3]); |
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| 133 | |||
| 134 | b1[0x10] = b2[0x10] + b2[0x17]; |
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| 135 | b1[0x17] = REAL_MUL(b2[0x10] - b2[0x17], costab[0]); |
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| 136 | b1[0x11] = b2[0x11] + b2[0x16]; |
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| 137 | b1[0x16] = REAL_MUL(b2[0x11] - b2[0x16], costab[1]); |
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| 138 | b1[0x12] = b2[0x12] + b2[0x15]; |
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| 139 | b1[0x15] = REAL_MUL(b2[0x12] - b2[0x15], costab[2]); |
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| 140 | b1[0x13] = b2[0x13] + b2[0x14]; |
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| 141 | b1[0x14] = REAL_MUL(b2[0x13] - b2[0x14], costab[3]); |
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| 142 | |||
| 143 | b1[0x18] = b2[0x18] + b2[0x1F]; |
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| 144 | b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x18], costab[0]); |
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| 145 | b1[0x19] = b2[0x19] + b2[0x1E]; |
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| 146 | b1[0x1E] = REAL_MUL(b2[0x1E] - b2[0x19], costab[1]); |
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| 147 | b1[0x1A] = b2[0x1A] + b2[0x1D]; |
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| 148 | b1[0x1D] = REAL_MUL(b2[0x1D] - b2[0x1A], costab[2]); |
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| 149 | b1[0x1B] = b2[0x1B] + b2[0x1C]; |
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| 150 | b1[0x1C] = REAL_MUL(b2[0x1C] - b2[0x1B], costab[3]); |
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| 151 | } |
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| 152 | |||
| 153 | { |
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| 154 | register real const cos0 = pnts[3][0]; |
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| 155 | register real const cos1 = pnts[3][1]; |
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| 156 | |||
| 157 | b2[0x00] = b1[0x00] + b1[0x03]; |
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| 158 | b2[0x03] = REAL_MUL(b1[0x00] - b1[0x03], cos0); |
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| 159 | b2[0x01] = b1[0x01] + b1[0x02]; |
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| 160 | b2[0x02] = REAL_MUL(b1[0x01] - b1[0x02], cos1); |
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| 161 | |||
| 162 | b2[0x04] = b1[0x04] + b1[0x07]; |
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| 163 | b2[0x07] = REAL_MUL(b1[0x07] - b1[0x04], cos0); |
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| 164 | b2[0x05] = b1[0x05] + b1[0x06]; |
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| 165 | b2[0x06] = REAL_MUL(b1[0x06] - b1[0x05], cos1); |
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| 166 | |||
| 167 | b2[0x08] = b1[0x08] + b1[0x0B]; |
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| 168 | b2[0x0B] = REAL_MUL(b1[0x08] - b1[0x0B], cos0); |
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| 169 | b2[0x09] = b1[0x09] + b1[0x0A]; |
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| 170 | b2[0x0A] = REAL_MUL(b1[0x09] - b1[0x0A], cos1); |
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| 171 | |||
| 172 | b2[0x0C] = b1[0x0C] + b1[0x0F]; |
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| 173 | b2[0x0F] = REAL_MUL(b1[0x0F] - b1[0x0C], cos0); |
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| 174 | b2[0x0D] = b1[0x0D] + b1[0x0E]; |
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| 175 | b2[0x0E] = REAL_MUL(b1[0x0E] - b1[0x0D], cos1); |
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| 176 | |||
| 177 | b2[0x10] = b1[0x10] + b1[0x13]; |
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| 178 | b2[0x13] = REAL_MUL(b1[0x10] - b1[0x13], cos0); |
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| 179 | b2[0x11] = b1[0x11] + b1[0x12]; |
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| 180 | b2[0x12] = REAL_MUL(b1[0x11] - b1[0x12], cos1); |
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| 181 | |||
| 182 | b2[0x14] = b1[0x14] + b1[0x17]; |
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| 183 | b2[0x17] = REAL_MUL(b1[0x17] - b1[0x14], cos0); |
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| 184 | b2[0x15] = b1[0x15] + b1[0x16]; |
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| 185 | b2[0x16] = REAL_MUL(b1[0x16] - b1[0x15], cos1); |
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| 186 | |||
| 187 | b2[0x18] = b1[0x18] + b1[0x1B]; |
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| 188 | b2[0x1B] = REAL_MUL(b1[0x18] - b1[0x1B], cos0); |
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| 189 | b2[0x19] = b1[0x19] + b1[0x1A]; |
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| 190 | b2[0x1A] = REAL_MUL(b1[0x19] - b1[0x1A], cos1); |
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| 191 | |||
| 192 | b2[0x1C] = b1[0x1C] + b1[0x1F]; |
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| 193 | b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x1C], cos0); |
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| 194 | b2[0x1D] = b1[0x1D] + b1[0x1E]; |
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| 195 | b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x1D], cos1); |
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| 196 | } |
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| 197 | |||
| 198 | { |
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| 199 | register real const cos0 = pnts[4][0]; |
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| 200 | |||
| 201 | b1[0x00] = b2[0x00] + b2[0x01]; |
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| 202 | b1[0x01] = REAL_MUL(b2[0x00] - b2[0x01], cos0); |
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| 203 | b1[0x02] = b2[0x02] + b2[0x03]; |
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| 204 | b1[0x03] = REAL_MUL(b2[0x03] - b2[0x02], cos0); |
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| 205 | b1[0x02] += b1[0x03]; |
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| 206 | |||
| 207 | b1[0x04] = b2[0x04] + b2[0x05]; |
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| 208 | b1[0x05] = REAL_MUL(b2[0x04] - b2[0x05], cos0); |
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| 209 | b1[0x06] = b2[0x06] + b2[0x07]; |
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| 210 | b1[0x07] = REAL_MUL(b2[0x07] - b2[0x06], cos0); |
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| 211 | b1[0x06] += b1[0x07]; |
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| 212 | b1[0x04] += b1[0x06]; |
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| 213 | b1[0x06] += b1[0x05]; |
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| 214 | b1[0x05] += b1[0x07]; |
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| 215 | |||
| 216 | b1[0x08] = b2[0x08] + b2[0x09]; |
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| 217 | b1[0x09] = REAL_MUL(b2[0x08] - b2[0x09], cos0); |
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| 218 | b1[0x0A] = b2[0x0A] + b2[0x0B]; |
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| 219 | b1[0x0B] = REAL_MUL(b2[0x0B] - b2[0x0A], cos0); |
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| 220 | b1[0x0A] += b1[0x0B]; |
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| 221 | |||
| 222 | b1[0x0C] = b2[0x0C] + b2[0x0D]; |
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| 223 | b1[0x0D] = REAL_MUL(b2[0x0C] - b2[0x0D], cos0); |
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| 224 | b1[0x0E] = b2[0x0E] + b2[0x0F]; |
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| 225 | b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x0E], cos0); |
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| 226 | b1[0x0E] += b1[0x0F]; |
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| 227 | b1[0x0C] += b1[0x0E]; |
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| 228 | b1[0x0E] += b1[0x0D]; |
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| 229 | b1[0x0D] += b1[0x0F]; |
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| 230 | |||
| 231 | b1[0x10] = b2[0x10] + b2[0x11]; |
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| 232 | b1[0x11] = REAL_MUL(b2[0x10] - b2[0x11], cos0); |
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| 233 | b1[0x12] = b2[0x12] + b2[0x13]; |
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| 234 | b1[0x13] = REAL_MUL(b2[0x13] - b2[0x12], cos0); |
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| 235 | b1[0x12] += b1[0x13]; |
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| 236 | |||
| 237 | b1[0x14] = b2[0x14] + b2[0x15]; |
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| 238 | b1[0x15] = REAL_MUL(b2[0x14] - b2[0x15], cos0); |
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| 239 | b1[0x16] = b2[0x16] + b2[0x17]; |
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| 240 | b1[0x17] = REAL_MUL(b2[0x17] - b2[0x16], cos0); |
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| 241 | b1[0x16] += b1[0x17]; |
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| 242 | b1[0x14] += b1[0x16]; |
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| 243 | b1[0x16] += b1[0x15]; |
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| 244 | b1[0x15] += b1[0x17]; |
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| 245 | |||
| 246 | b1[0x18] = b2[0x18] + b2[0x19]; |
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| 247 | b1[0x19] = REAL_MUL(b2[0x18] - b2[0x19], cos0); |
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| 248 | b1[0x1A] = b2[0x1A] + b2[0x1B]; |
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| 249 | b1[0x1B] = REAL_MUL(b2[0x1B] - b2[0x1A], cos0); |
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| 250 | b1[0x1A] += b1[0x1B]; |
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| 251 | |||
| 252 | b1[0x1C] = b2[0x1C] + b2[0x1D]; |
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| 253 | b1[0x1D] = REAL_MUL(b2[0x1C] - b2[0x1D], cos0); |
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| 254 | b1[0x1E] = b2[0x1E] + b2[0x1F]; |
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| 255 | b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x1E], cos0); |
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| 256 | b1[0x1E] += b1[0x1F]; |
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| 257 | b1[0x1C] += b1[0x1E]; |
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| 258 | b1[0x1E] += b1[0x1D]; |
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| 259 | b1[0x1D] += b1[0x1F]; |
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| 260 | } |
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| 261 | |||
| 262 | out0[0x10*16] = REAL_SCALE_DCT64(b1[0x00]); |
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| 263 | out0[0x10*12] = REAL_SCALE_DCT64(b1[0x04]); |
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| 264 | out0[0x10* 8] = REAL_SCALE_DCT64(b1[0x02]); |
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| 265 | out0[0x10* 4] = REAL_SCALE_DCT64(b1[0x06]); |
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| 266 | out0[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]); |
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| 267 | out1[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]); |
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| 268 | out1[0x10* 4] = REAL_SCALE_DCT64(b1[0x05]); |
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| 269 | out1[0x10* 8] = REAL_SCALE_DCT64(b1[0x03]); |
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| 270 | out1[0x10*12] = REAL_SCALE_DCT64(b1[0x07]); |
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| 271 | |||
| 272 | #if 1 |
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| 273 | out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08] + b1[0x0C]); |
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| 274 | out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C] + b1[0x0a]); |
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| 275 | out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A] + b1[0x0E]); |
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| 276 | out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E] + b1[0x09]); |
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| 277 | out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09] + b1[0x0D]); |
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| 278 | out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D] + b1[0x0B]); |
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| 279 | out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B] + b1[0x0F]); |
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| 280 | out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]); |
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| 281 | #else |
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| 282 | b1[0x08] += b1[0x0C]; |
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| 283 | out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08]); |
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| 284 | b1[0x0C] += b1[0x0a]; |
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| 285 | out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C]); |
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| 286 | b1[0x0A] += b1[0x0E]; |
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| 287 | out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A]); |
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| 288 | b1[0x0E] += b1[0x09]; |
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| 289 | out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E]); |
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| 290 | b1[0x09] += b1[0x0D]; |
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| 291 | out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09]); |
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| 292 | b1[0x0D] += b1[0x0B]; |
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| 293 | out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D]); |
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| 294 | b1[0x0B] += b1[0x0F]; |
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| 295 | out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B]); |
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| 296 | out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]); |
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| 297 | #endif |
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| 298 | |||
| 299 | { |
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| 300 | real tmp; |
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| 301 | tmp = b1[0x18] + b1[0x1C]; |
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| 302 | out0[0x10*15] = REAL_SCALE_DCT64(tmp + b1[0x10]); |
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| 303 | out0[0x10*13] = REAL_SCALE_DCT64(tmp + b1[0x14]); |
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| 304 | tmp = b1[0x1C] + b1[0x1A]; |
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| 305 | out0[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x14]); |
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| 306 | out0[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x12]); |
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| 307 | tmp = b1[0x1A] + b1[0x1E]; |
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| 308 | out0[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x12]); |
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| 309 | out0[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x16]); |
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| 310 | tmp = b1[0x1E] + b1[0x19]; |
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| 311 | out0[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x16]); |
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| 312 | out0[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]); |
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| 313 | tmp = b1[0x19] + b1[0x1D]; |
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| 314 | out1[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]); |
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| 315 | out1[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x15]); |
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| 316 | tmp = b1[0x1D] + b1[0x1B]; |
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| 317 | out1[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x15]); |
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| 318 | out1[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x13]); |
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| 319 | tmp = b1[0x1B] + b1[0x1F]; |
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| 320 | out1[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x13]); |
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| 321 | out1[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x17]); |
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| 322 | out1[0x10*13] = REAL_SCALE_DCT64(b1[0x17] + b1[0x1F]); |
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| 323 | out1[0x10*15] = REAL_SCALE_DCT64(b1[0x1F]); |
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| 324 | } |
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| 325 | } |
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| 326 | |||
| 327 | /* |
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| 328 | * the call via dct64 is a trick to force GCC to use |
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| 329 | * (new) registers for the b1,b2 pointer to the bufs[xx] field |
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| 330 | */ |
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| 331 | void dct64_i386(real *a,real *b,real *c) |
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| 332 | { |
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| 333 | real bufs[0x40]; |
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| 334 | dct64_1(a,b,bufs,bufs+0x20,c); |
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| 335 | } |
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| 336 |