0,0 → 1,285 |
/* |
tabinit.c: initialize tables... |
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copyright ?-2008 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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#include "mpg123lib_intern.h" |
#include "debug.h" |
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/* That altivec alignment part here should not hurt generic code, I hope */ |
#ifdef OPT_ALTIVEC |
static ALIGNED(16) real cos64[16]; |
static ALIGNED(16) real cos32[8]; |
static ALIGNED(16) real cos16[4]; |
static ALIGNED(16) real cos8[2]; |
static ALIGNED(16) real cos4[1]; |
#elif defined(REAL_IS_FIXED) && defined(PRECALC_TABLES) |
static real cos64[16] = |
{ |
8398725,8480395,8647771,8909416,9279544,9780026,10443886,11321405, |
12491246,14081950,16316987,19619946,24900150,34523836,57170182,170959967 |
}; |
static real cos32[8] = |
{ |
8429197,8766072,9511743,10851869,13223040,17795219,28897867,85583072 |
}; |
static real cos16[4] = |
{ |
8552951,10088893,15099095,42998586 |
}; |
static real cos8[2] = |
{ |
9079764,21920489 |
}; |
static real cos4[1] = |
{ |
11863283 |
}; |
#else |
static real cos64[16],cos32[8],cos16[4],cos8[2],cos4[1]; |
#endif |
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real *pnts[] = { cos64,cos32,cos16,cos8,cos4 }; |
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static long intwinbase[] = { |
0, -1, -1, -1, -1, -1, -1, -2, -2, -2, |
-2, -3, -3, -4, -4, -5, -5, -6, -7, -7, |
-8, -9, -10, -11, -13, -14, -16, -17, -19, -21, |
-24, -26, -29, -31, -35, -38, -41, -45, -49, -53, |
-58, -63, -68, -73, -79, -85, -91, -97, -104, -111, |
-117, -125, -132, -139, -147, -154, -161, -169, -176, -183, |
-190, -196, -202, -208, -213, -218, -222, -225, -227, -228, |
-228, -227, -224, -221, -215, -208, -200, -189, -177, -163, |
-146, -127, -106, -83, -57, -29, 2, 36, 72, 111, |
153, 197, 244, 294, 347, 401, 459, 519, 581, 645, |
711, 779, 848, 919, 991, 1064, 1137, 1210, 1283, 1356, |
1428, 1498, 1567, 1634, 1698, 1759, 1817, 1870, 1919, 1962, |
2001, 2032, 2057, 2075, 2085, 2087, 2080, 2063, 2037, 2000, |
1952, 1893, 1822, 1739, 1644, 1535, 1414, 1280, 1131, 970, |
794, 605, 402, 185, -45, -288, -545, -814, -1095, -1388, |
-1692, -2006, -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788, |
-5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, -7910, -8209, |
-8491, -8755, -8998, -9219, -9416, -9585, -9727, -9838, -9916, -9959, |
-9966, -9935, -9863, -9750, -9592, -9389, -9139, -8840, -8492, -8092, |
-7640, -7134, -6574, -5959, -5288, -4561, -3776, -2935, -2037, -1082, |
-70, 998, 2122, 3300, 4533, 5818, 7154, 8540, 9975, 11455, |
12980, 14548, 16155, 17799, 19478, 21189, 22929, 24694, 26482, 28289, |
30112, 31947, 33791, 35640, 37489, 39336, 41176, 43006, 44821, 46617, |
48390, 50137, 51853, 53534, 55178, 56778, 58333, 59838, 61289, 62684, |
64019, 65290, 66494, 67629, 68692, 69679, 70590, 71420, 72169, 72835, |
73415, 73908, 74313, 74630, 74856, 74992, 75038 }; |
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void prepare_decode_tables() |
{ |
#if !defined(REAL_IS_FIXED) || !defined(PRECALC_TABLES) |
int i,k,kr,divv; |
real *costab; |
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for(i=0;i<5;i++) |
{ |
kr=0x10>>i; divv=0x40>>i; |
costab = pnts[i]; |
for(k=0;k<kr;k++) |
costab[k] = DOUBLE_TO_REAL(1.0 / (2.0 * cos(M_PI * ((double) k * 2.0 + 1.0) / (double) divv))); |
} |
#endif |
} |
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#ifdef OPT_MMXORSSE |
#ifndef OPT_X86_64 |
void make_decode_tables_mmx_asm(long scaleval, float* decwin_mmx, float *decwins); |
void make_decode_tables_mmx(mpg123_handle *fr) |
{ |
debug("MMX decode tables"); |
/* Take care: The scale should be like before, when we didn't have float output all around. */ |
make_decode_tables_mmx_asm((long)((fr->lastscale < 0 ? fr->p.outscale : fr->lastscale)*SHORT_SCALE), fr->decwin_mmx, fr->decwins); |
debug("MMX decode tables done"); |
} |
#else |
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/* This mimics round() as defined in C99. We stay C89. */ |
static int rounded(double f) |
{ |
return (int)(f>0 ? floor(f+0.5) : ceil(f-0.5)); |
} |
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/* x86-64 doesn't use asm version */ |
void make_decode_tables_mmx(mpg123_handle *fr) |
{ |
int i,j,val; |
int idx = 0; |
short *ptr = (short *)fr->decwins; |
/* Scale is always based on 1.0 . */ |
double scaleval = -0.5*(fr->lastscale < 0 ? fr->p.outscale : fr->lastscale); |
debug1("MMX decode tables with scaleval %g", scaleval); |
for(i=0,j=0;i<256;i++,j++,idx+=32) |
{ |
if(idx < 512+16) |
fr->decwin_mmx[idx+16] = fr->decwin_mmx[idx] = DOUBLE_TO_REAL((double) intwinbase[j] * scaleval); |
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if(i % 32 == 31) |
idx -= 1023; |
if(i % 64 == 63) |
scaleval = - scaleval; |
} |
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for( /* i=256 */ ;i<512;i++,j--,idx+=32) |
{ |
if(idx < 512+16) |
fr->decwin_mmx[idx+16] = fr->decwin_mmx[idx] = DOUBLE_TO_REAL((double) intwinbase[j] * scaleval); |
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if(i % 32 == 31) |
idx -= 1023; |
if(i % 64 == 63) |
scaleval = - scaleval; |
} |
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for(i=0; i<512; i++) { |
if(i&1) val = rounded(fr->decwin_mmx[i]*0.5); |
else val = rounded(fr->decwin_mmx[i]*-0.5); |
if(val > 32767) val = 32767; |
else if(val < -32768) val = -32768; |
ptr[i] = val; |
} |
for(i=512; i<512+32; i++) { |
if(i&1) val = rounded(fr->decwin_mmx[i]*0.5); |
else val = 0; |
if(val > 32767) val = 32767; |
else if(val < -32768) val = -32768; |
ptr[i] = val; |
} |
for(i=0; i<512; i++) { |
val = rounded(fr->decwin_mmx[511-i]*-0.5); |
if(val > 32767) val = 32767; |
else if(val < -32768) val = -32768; |
ptr[512+32+i] = val; |
} |
debug("decode tables done"); |
} |
#endif |
#endif |
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void make_decode_tables(mpg123_handle *fr) |
{ |
int i,j; |
int idx = 0; |
/* Scale is always based on 1.0 . */ |
double scaleval = -0.5*(fr->lastscale < 0 ? fr->p.outscale : fr->lastscale); |
debug1("decode tables with scaleval %g", scaleval); |
#ifdef REAL_IS_FIXED |
long scaleval_long = DOUBLE_TO_REAL_15(scaleval); |
#endif |
for(i=0,j=0;i<256;i++,j++,idx+=32) |
{ |
if(idx < 512+16) |
#ifdef REAL_IS_FIXED |
fr->decwin[idx+16] = fr->decwin[idx] = REAL_SCALE_WINDOW(intwinbase[j] * scaleval_long); |
#else |
fr->decwin[idx+16] = fr->decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] * scaleval); |
#endif |
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if(i % 32 == 31) |
idx -= 1023; |
if(i % 64 == 63) |
#ifdef REAL_IS_FIXED |
scaleval_long = - scaleval_long; |
#else |
scaleval = - scaleval; |
#endif |
} |
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for( /* i=256 */ ;i<512;i++,j--,idx+=32) |
{ |
if(idx < 512+16) |
#ifdef REAL_IS_FIXED |
fr->decwin[idx+16] = fr->decwin[idx] = REAL_SCALE_WINDOW(intwinbase[j] * scaleval_long); |
#else |
fr->decwin[idx+16] = fr->decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] * scaleval); |
#endif |
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if(i % 32 == 31) |
idx -= 1023; |
if(i % 64 == 63) |
#ifdef REAL_IS_FIXED |
scaleval_long = - scaleval_long; |
#else |
scaleval = - scaleval; |
#endif |
} |
#if defined(OPT_X86_64) || defined(OPT_ALTIVEC) || defined(OPT_SSE) || defined(OPT_ARM) |
if(fr->cpu_opts.type == x86_64 || fr->cpu_opts.type == altivec || fr->cpu_opts.type == sse || fr->cpu_opts.type == arm) |
{ /* for float SSE / AltiVec / ARM decoder */ |
for(i=512; i<512+32; i++) |
{ |
fr->decwin[i] = (i&1) ? fr->decwin[i] : 0; |
} |
for(i=0; i<512; i++) |
{ |
fr->decwin[512+32+i] = -fr->decwin[511-i]; |
} |
} |
#endif |
debug("decode tables done"); |
} |
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#ifndef NO_8BIT |
int make_conv16to8_table(mpg123_handle *fr) |
{ |
int i; |
int mode = fr->af.encoding; |
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/* |
* ????: 8.0 is right but on SB cards '2.0' is a better value ??? |
*/ |
const double mul = 8.0; |
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if(!fr->conv16to8_buf){ |
fr->conv16to8_buf = (unsigned char *) malloc(8192); |
if(!fr->conv16to8_buf) { |
fr->err = MPG123_ERR_16TO8TABLE; |
if(NOQUIET) error("Can't allocate 16 to 8 converter table!"); |
return -1; |
} |
fr->conv16to8 = fr->conv16to8_buf + 4096; |
} |
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if(fr->af.encoding == MPG123_ENC_ULAW_8){ |
double m=127.0 / log(256.0); |
int c1; |
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for(i=-4096;i<4096;i++) { |
/* dunno whether this is a valid transformation rule ?!?!? */ |
if(i < 0) |
c1 = 127 - (int) (log( 1.0 - 255.0 * (double) i*mul / 32768.0 ) * m); |
else |
c1 = 255 - (int) (log( 1.0 + 255.0 * (double) i*mul / 32768.0 ) * m); |
if((c1 < 0 || c1 > 255) && NOQUIET) error2("Converror %d %d",i,c1); |
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if(c1 == 0) |
c1 = 2; |
fr->conv16to8[i] = (unsigned char) c1; |
} |
} |
else if(mode == MPG123_ENC_SIGNED_8) { |
for(i=-4096;i<4096;i++) { |
fr->conv16to8[i] = i>>5; |
} |
} |
else if(mode == MPG123_ENC_UNSIGNED_8) { |
for(i=-4096;i<4096;i++) { |
fr->conv16to8[i] = (i>>5)+128; |
} |
} |
else { |
for(i=-4096;i<4096;i++) { |
fr->conv16to8[i] = 0; |
} |
} |
return 0; |
} |
#endif |
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