/* tabinit.c: initialize tables... 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 */ #include "mpg123lib_intern.h" #include "debug.h" /* 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 real *pnts[] = { cos64,cos32,cos16,cos8,cos4 }; 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 }; void prepare_decode_tables() { #if !defined(REAL_IS_FIXED) || !defined(PRECALC_TABLES) int i,k,kr,divv; real *costab; 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 } #ifdef OPT_MMXORSSE #if !defined(OPT_X86_64) && !defined(OPT_NEON) 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 /* 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)); } /* 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); if(i % 32 == 31) idx -= 1023; if(i % 64 == 63) scaleval = - scaleval; } 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); if(i % 32 == 31) idx -= 1023; if(i % 64 == 63) scaleval = - scaleval; } 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 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 if(i % 32 == 31) idx -= 1023; if(i % 64 == 63) #ifdef REAL_IS_FIXED scaleval_long = - scaleval_long; #else scaleval = - scaleval; #endif } 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 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) || defined(OPT_NEON) if(fr->cpu_opts.type == x86_64 || fr->cpu_opts.type == altivec || fr->cpu_opts.type == sse || fr->cpu_opts.type == arm || fr->cpu_opts.type == neon) { /* 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]; } #ifdef OPT_NEON if(fr->cpu_opts.type == neon) { for(i=0; i<512; i+=2) { fr->decwin[i] = -fr->decwin[i]; } } #endif } #endif debug("decode tables done"); } #ifndef NO_8BIT int make_conv16to8_table(mpg123_handle *fr) { int i; int mode = fr->af.encoding; /* * ????: 8.0 is right but on SB cards '2.0' is a better value ??? */ const double mul = 8.0; 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; } if(fr->af.encoding == MPG123_ENC_ULAW_8){ double m=127.0 / log(256.0); int c1; 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); 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