0,0 → 1,336 |
/* |
dct64_i386.c: DCT64, a C variant for i386 |
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copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1 |
see COPYING and AUTHORS files in distribution or http://mpg123.org |
initially written by Michael Hipp |
*/ |
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/* |
* Discrete Cosine Tansform (DCT) for subband synthesis |
* optimized for machines with no auto-increment. |
* The performance is highly compiler dependend. Maybe |
* the dct64.c version for 'normal' processor may be faster |
* even for Intel processors. |
*/ |
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#include "mpg123lib_intern.h" |
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static void dct64_1(real *out0,real *out1,real *b1,real *b2,real *samples) |
{ |
{ |
register real *costab = pnts[0]; |
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b1[0x00] = samples[0x00] + samples[0x1F]; |
b1[0x01] = samples[0x01] + samples[0x1E]; |
b1[0x1F] = REAL_MUL(samples[0x00] - samples[0x1F], costab[0x0]); |
b1[0x1E] = REAL_MUL(samples[0x01] - samples[0x1E], costab[0x1]); |
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b1[0x02] = samples[0x02] + samples[0x1D]; |
b1[0x03] = samples[0x03] + samples[0x1C]; |
b1[0x1D] = REAL_MUL(samples[0x02] - samples[0x1D], costab[0x2]); |
b1[0x1C] = REAL_MUL(samples[0x03] - samples[0x1C], costab[0x3]); |
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b1[0x04] = samples[0x04] + samples[0x1B]; |
b1[0x05] = samples[0x05] + samples[0x1A]; |
b1[0x1B] = REAL_MUL(samples[0x04] - samples[0x1B], costab[0x4]); |
b1[0x1A] = REAL_MUL(samples[0x05] - samples[0x1A], costab[0x5]); |
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b1[0x06] = samples[0x06] + samples[0x19]; |
b1[0x07] = samples[0x07] + samples[0x18]; |
b1[0x19] = REAL_MUL(samples[0x06] - samples[0x19], costab[0x6]); |
b1[0x18] = REAL_MUL(samples[0x07] - samples[0x18], costab[0x7]); |
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b1[0x08] = samples[0x08] + samples[0x17]; |
b1[0x09] = samples[0x09] + samples[0x16]; |
b1[0x17] = REAL_MUL(samples[0x08] - samples[0x17], costab[0x8]); |
b1[0x16] = REAL_MUL(samples[0x09] - samples[0x16], costab[0x9]); |
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b1[0x0A] = samples[0x0A] + samples[0x15]; |
b1[0x0B] = samples[0x0B] + samples[0x14]; |
b1[0x15] = REAL_MUL(samples[0x0A] - samples[0x15], costab[0xA]); |
b1[0x14] = REAL_MUL(samples[0x0B] - samples[0x14], costab[0xB]); |
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b1[0x0C] = samples[0x0C] + samples[0x13]; |
b1[0x0D] = samples[0x0D] + samples[0x12]; |
b1[0x13] = REAL_MUL(samples[0x0C] - samples[0x13], costab[0xC]); |
b1[0x12] = REAL_MUL(samples[0x0D] - samples[0x12], costab[0xD]); |
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b1[0x0E] = samples[0x0E] + samples[0x11]; |
b1[0x0F] = samples[0x0F] + samples[0x10]; |
b1[0x11] = REAL_MUL(samples[0x0E] - samples[0x11], costab[0xE]); |
b1[0x10] = REAL_MUL(samples[0x0F] - samples[0x10], costab[0xF]); |
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} |
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{ |
register real *costab = pnts[1]; |
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b2[0x00] = b1[0x00] + b1[0x0F]; |
b2[0x01] = b1[0x01] + b1[0x0E]; |
b2[0x0F] = REAL_MUL(b1[0x00] - b1[0x0F], costab[0]); |
b2[0x0E] = REAL_MUL(b1[0x01] - b1[0x0E], costab[1]); |
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b2[0x02] = b1[0x02] + b1[0x0D]; |
b2[0x03] = b1[0x03] + b1[0x0C]; |
b2[0x0D] = REAL_MUL(b1[0x02] - b1[0x0D], costab[2]); |
b2[0x0C] = REAL_MUL(b1[0x03] - b1[0x0C], costab[3]); |
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b2[0x04] = b1[0x04] + b1[0x0B]; |
b2[0x05] = b1[0x05] + b1[0x0A]; |
b2[0x0B] = REAL_MUL(b1[0x04] - b1[0x0B], costab[4]); |
b2[0x0A] = REAL_MUL(b1[0x05] - b1[0x0A], costab[5]); |
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b2[0x06] = b1[0x06] + b1[0x09]; |
b2[0x07] = b1[0x07] + b1[0x08]; |
b2[0x09] = REAL_MUL(b1[0x06] - b1[0x09], costab[6]); |
b2[0x08] = REAL_MUL(b1[0x07] - b1[0x08], costab[7]); |
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/* */ |
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b2[0x10] = b1[0x10] + b1[0x1F]; |
b2[0x11] = b1[0x11] + b1[0x1E]; |
b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x10], costab[0]); |
b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x11], costab[1]); |
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b2[0x12] = b1[0x12] + b1[0x1D]; |
b2[0x13] = b1[0x13] + b1[0x1C]; |
b2[0x1D] = REAL_MUL(b1[0x1D] - b1[0x12], costab[2]); |
b2[0x1C] = REAL_MUL(b1[0x1C] - b1[0x13], costab[3]); |
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b2[0x14] = b1[0x14] + b1[0x1B]; |
b2[0x15] = b1[0x15] + b1[0x1A]; |
b2[0x1B] = REAL_MUL(b1[0x1B] - b1[0x14], costab[4]); |
b2[0x1A] = REAL_MUL(b1[0x1A] - b1[0x15], costab[5]); |
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b2[0x16] = b1[0x16] + b1[0x19]; |
b2[0x17] = b1[0x17] + b1[0x18]; |
b2[0x19] = REAL_MUL(b1[0x19] - b1[0x16], costab[6]); |
b2[0x18] = REAL_MUL(b1[0x18] - b1[0x17], costab[7]); |
} |
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{ |
register real *costab = pnts[2]; |
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b1[0x00] = b2[0x00] + b2[0x07]; |
b1[0x07] = REAL_MUL(b2[0x00] - b2[0x07], costab[0]); |
b1[0x01] = b2[0x01] + b2[0x06]; |
b1[0x06] = REAL_MUL(b2[0x01] - b2[0x06], costab[1]); |
b1[0x02] = b2[0x02] + b2[0x05]; |
b1[0x05] = REAL_MUL(b2[0x02] - b2[0x05], costab[2]); |
b1[0x03] = b2[0x03] + b2[0x04]; |
b1[0x04] = REAL_MUL(b2[0x03] - b2[0x04], costab[3]); |
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b1[0x08] = b2[0x08] + b2[0x0F]; |
b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x08], costab[0]); |
b1[0x09] = b2[0x09] + b2[0x0E]; |
b1[0x0E] = REAL_MUL(b2[0x0E] - b2[0x09], costab[1]); |
b1[0x0A] = b2[0x0A] + b2[0x0D]; |
b1[0x0D] = REAL_MUL(b2[0x0D] - b2[0x0A], costab[2]); |
b1[0x0B] = b2[0x0B] + b2[0x0C]; |
b1[0x0C] = REAL_MUL(b2[0x0C] - b2[0x0B], costab[3]); |
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b1[0x10] = b2[0x10] + b2[0x17]; |
b1[0x17] = REAL_MUL(b2[0x10] - b2[0x17], costab[0]); |
b1[0x11] = b2[0x11] + b2[0x16]; |
b1[0x16] = REAL_MUL(b2[0x11] - b2[0x16], costab[1]); |
b1[0x12] = b2[0x12] + b2[0x15]; |
b1[0x15] = REAL_MUL(b2[0x12] - b2[0x15], costab[2]); |
b1[0x13] = b2[0x13] + b2[0x14]; |
b1[0x14] = REAL_MUL(b2[0x13] - b2[0x14], costab[3]); |
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b1[0x18] = b2[0x18] + b2[0x1F]; |
b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x18], costab[0]); |
b1[0x19] = b2[0x19] + b2[0x1E]; |
b1[0x1E] = REAL_MUL(b2[0x1E] - b2[0x19], costab[1]); |
b1[0x1A] = b2[0x1A] + b2[0x1D]; |
b1[0x1D] = REAL_MUL(b2[0x1D] - b2[0x1A], costab[2]); |
b1[0x1B] = b2[0x1B] + b2[0x1C]; |
b1[0x1C] = REAL_MUL(b2[0x1C] - b2[0x1B], costab[3]); |
} |
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{ |
register real const cos0 = pnts[3][0]; |
register real const cos1 = pnts[3][1]; |
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b2[0x00] = b1[0x00] + b1[0x03]; |
b2[0x03] = REAL_MUL(b1[0x00] - b1[0x03], cos0); |
b2[0x01] = b1[0x01] + b1[0x02]; |
b2[0x02] = REAL_MUL(b1[0x01] - b1[0x02], cos1); |
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b2[0x04] = b1[0x04] + b1[0x07]; |
b2[0x07] = REAL_MUL(b1[0x07] - b1[0x04], cos0); |
b2[0x05] = b1[0x05] + b1[0x06]; |
b2[0x06] = REAL_MUL(b1[0x06] - b1[0x05], cos1); |
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b2[0x08] = b1[0x08] + b1[0x0B]; |
b2[0x0B] = REAL_MUL(b1[0x08] - b1[0x0B], cos0); |
b2[0x09] = b1[0x09] + b1[0x0A]; |
b2[0x0A] = REAL_MUL(b1[0x09] - b1[0x0A], cos1); |
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b2[0x0C] = b1[0x0C] + b1[0x0F]; |
b2[0x0F] = REAL_MUL(b1[0x0F] - b1[0x0C], cos0); |
b2[0x0D] = b1[0x0D] + b1[0x0E]; |
b2[0x0E] = REAL_MUL(b1[0x0E] - b1[0x0D], cos1); |
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b2[0x10] = b1[0x10] + b1[0x13]; |
b2[0x13] = REAL_MUL(b1[0x10] - b1[0x13], cos0); |
b2[0x11] = b1[0x11] + b1[0x12]; |
b2[0x12] = REAL_MUL(b1[0x11] - b1[0x12], cos1); |
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b2[0x14] = b1[0x14] + b1[0x17]; |
b2[0x17] = REAL_MUL(b1[0x17] - b1[0x14], cos0); |
b2[0x15] = b1[0x15] + b1[0x16]; |
b2[0x16] = REAL_MUL(b1[0x16] - b1[0x15], cos1); |
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b2[0x18] = b1[0x18] + b1[0x1B]; |
b2[0x1B] = REAL_MUL(b1[0x18] - b1[0x1B], cos0); |
b2[0x19] = b1[0x19] + b1[0x1A]; |
b2[0x1A] = REAL_MUL(b1[0x19] - b1[0x1A], cos1); |
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b2[0x1C] = b1[0x1C] + b1[0x1F]; |
b2[0x1F] = REAL_MUL(b1[0x1F] - b1[0x1C], cos0); |
b2[0x1D] = b1[0x1D] + b1[0x1E]; |
b2[0x1E] = REAL_MUL(b1[0x1E] - b1[0x1D], cos1); |
} |
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{ |
register real const cos0 = pnts[4][0]; |
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b1[0x00] = b2[0x00] + b2[0x01]; |
b1[0x01] = REAL_MUL(b2[0x00] - b2[0x01], cos0); |
b1[0x02] = b2[0x02] + b2[0x03]; |
b1[0x03] = REAL_MUL(b2[0x03] - b2[0x02], cos0); |
b1[0x02] += b1[0x03]; |
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b1[0x04] = b2[0x04] + b2[0x05]; |
b1[0x05] = REAL_MUL(b2[0x04] - b2[0x05], cos0); |
b1[0x06] = b2[0x06] + b2[0x07]; |
b1[0x07] = REAL_MUL(b2[0x07] - b2[0x06], cos0); |
b1[0x06] += b1[0x07]; |
b1[0x04] += b1[0x06]; |
b1[0x06] += b1[0x05]; |
b1[0x05] += b1[0x07]; |
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b1[0x08] = b2[0x08] + b2[0x09]; |
b1[0x09] = REAL_MUL(b2[0x08] - b2[0x09], cos0); |
b1[0x0A] = b2[0x0A] + b2[0x0B]; |
b1[0x0B] = REAL_MUL(b2[0x0B] - b2[0x0A], cos0); |
b1[0x0A] += b1[0x0B]; |
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b1[0x0C] = b2[0x0C] + b2[0x0D]; |
b1[0x0D] = REAL_MUL(b2[0x0C] - b2[0x0D], cos0); |
b1[0x0E] = b2[0x0E] + b2[0x0F]; |
b1[0x0F] = REAL_MUL(b2[0x0F] - b2[0x0E], cos0); |
b1[0x0E] += b1[0x0F]; |
b1[0x0C] += b1[0x0E]; |
b1[0x0E] += b1[0x0D]; |
b1[0x0D] += b1[0x0F]; |
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b1[0x10] = b2[0x10] + b2[0x11]; |
b1[0x11] = REAL_MUL(b2[0x10] - b2[0x11], cos0); |
b1[0x12] = b2[0x12] + b2[0x13]; |
b1[0x13] = REAL_MUL(b2[0x13] - b2[0x12], cos0); |
b1[0x12] += b1[0x13]; |
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b1[0x14] = b2[0x14] + b2[0x15]; |
b1[0x15] = REAL_MUL(b2[0x14] - b2[0x15], cos0); |
b1[0x16] = b2[0x16] + b2[0x17]; |
b1[0x17] = REAL_MUL(b2[0x17] - b2[0x16], cos0); |
b1[0x16] += b1[0x17]; |
b1[0x14] += b1[0x16]; |
b1[0x16] += b1[0x15]; |
b1[0x15] += b1[0x17]; |
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b1[0x18] = b2[0x18] + b2[0x19]; |
b1[0x19] = REAL_MUL(b2[0x18] - b2[0x19], cos0); |
b1[0x1A] = b2[0x1A] + b2[0x1B]; |
b1[0x1B] = REAL_MUL(b2[0x1B] - b2[0x1A], cos0); |
b1[0x1A] += b1[0x1B]; |
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b1[0x1C] = b2[0x1C] + b2[0x1D]; |
b1[0x1D] = REAL_MUL(b2[0x1C] - b2[0x1D], cos0); |
b1[0x1E] = b2[0x1E] + b2[0x1F]; |
b1[0x1F] = REAL_MUL(b2[0x1F] - b2[0x1E], cos0); |
b1[0x1E] += b1[0x1F]; |
b1[0x1C] += b1[0x1E]; |
b1[0x1E] += b1[0x1D]; |
b1[0x1D] += b1[0x1F]; |
} |
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out0[0x10*16] = REAL_SCALE_DCT64(b1[0x00]); |
out0[0x10*12] = REAL_SCALE_DCT64(b1[0x04]); |
out0[0x10* 8] = REAL_SCALE_DCT64(b1[0x02]); |
out0[0x10* 4] = REAL_SCALE_DCT64(b1[0x06]); |
out0[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]); |
out1[0x10* 0] = REAL_SCALE_DCT64(b1[0x01]); |
out1[0x10* 4] = REAL_SCALE_DCT64(b1[0x05]); |
out1[0x10* 8] = REAL_SCALE_DCT64(b1[0x03]); |
out1[0x10*12] = REAL_SCALE_DCT64(b1[0x07]); |
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#if 1 |
out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08] + b1[0x0C]); |
out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C] + b1[0x0a]); |
out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A] + b1[0x0E]); |
out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E] + b1[0x09]); |
out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09] + b1[0x0D]); |
out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D] + b1[0x0B]); |
out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B] + b1[0x0F]); |
out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]); |
#else |
b1[0x08] += b1[0x0C]; |
out0[0x10*14] = REAL_SCALE_DCT64(b1[0x08]); |
b1[0x0C] += b1[0x0a]; |
out0[0x10*10] = REAL_SCALE_DCT64(b1[0x0C]); |
b1[0x0A] += b1[0x0E]; |
out0[0x10* 6] = REAL_SCALE_DCT64(b1[0x0A]); |
b1[0x0E] += b1[0x09]; |
out0[0x10* 2] = REAL_SCALE_DCT64(b1[0x0E]); |
b1[0x09] += b1[0x0D]; |
out1[0x10* 2] = REAL_SCALE_DCT64(b1[0x09]); |
b1[0x0D] += b1[0x0B]; |
out1[0x10* 6] = REAL_SCALE_DCT64(b1[0x0D]); |
b1[0x0B] += b1[0x0F]; |
out1[0x10*10] = REAL_SCALE_DCT64(b1[0x0B]); |
out1[0x10*14] = REAL_SCALE_DCT64(b1[0x0F]); |
#endif |
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{ |
real tmp; |
tmp = b1[0x18] + b1[0x1C]; |
out0[0x10*15] = REAL_SCALE_DCT64(tmp + b1[0x10]); |
out0[0x10*13] = REAL_SCALE_DCT64(tmp + b1[0x14]); |
tmp = b1[0x1C] + b1[0x1A]; |
out0[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x14]); |
out0[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x12]); |
tmp = b1[0x1A] + b1[0x1E]; |
out0[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x12]); |
out0[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x16]); |
tmp = b1[0x1E] + b1[0x19]; |
out0[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x16]); |
out0[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]); |
tmp = b1[0x19] + b1[0x1D]; |
out1[0x10* 1] = REAL_SCALE_DCT64(tmp + b1[0x11]); |
out1[0x10* 3] = REAL_SCALE_DCT64(tmp + b1[0x15]); |
tmp = b1[0x1D] + b1[0x1B]; |
out1[0x10* 5] = REAL_SCALE_DCT64(tmp + b1[0x15]); |
out1[0x10* 7] = REAL_SCALE_DCT64(tmp + b1[0x13]); |
tmp = b1[0x1B] + b1[0x1F]; |
out1[0x10* 9] = REAL_SCALE_DCT64(tmp + b1[0x13]); |
out1[0x10*11] = REAL_SCALE_DCT64(tmp + b1[0x17]); |
out1[0x10*13] = REAL_SCALE_DCT64(b1[0x17] + b1[0x1F]); |
out1[0x10*15] = REAL_SCALE_DCT64(b1[0x1F]); |
} |
} |
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/* |
* the call via dct64 is a trick to force GCC to use |
* (new) registers for the b1,b2 pointer to the bufs[xx] field |
*/ |
void dct64_i386(real *a,real *b,real *c) |
{ |
real bufs[0x40]; |
dct64_1(a,b,bufs,bufs+0x20,c); |
} |
|