| 0,0 → 1,159 |
|---|
| /* |
| tabinit.c: initialize tables... |
| |
| 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.de |
| initially written by Michael Hipp |
| */ |
| |
| //#include <stdlib.h> |
| |
| //#include "config.h" |
| #include "mpg123.h" |
| //#include "debug.h" |
| |
| static unsigned char *conv16to8_buf = NULL; |
| unsigned char *conv16to8; |
| |
| #ifndef USE_MMX |
| real decwin[512+32]; |
| #ifdef USE_ALTIVEC |
| static real __attribute__ ((aligned (16))) cos64[16]; |
| static real __attribute__ ((aligned (16))) cos32[8]; |
| static real __attribute__ ((aligned (16))) cos16[4]; |
| static real __attribute__ ((aligned (16))) cos8[2]; |
| static real __attribute__ ((aligned (16))) cos4[1]; |
| #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 }; |
| |
| #pragma warning(disable:4244) |
| void make_decode_tables(long scaleval) |
| { |
| int i,j,k,kr,divv; |
| real *costab; |
| int idx; |
| |
| |
| 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))); |
| |
| } |
| |
| idx = 0; |
| scaleval = -scaleval; |
| for(i=0,j=0;i<256;i++,j++,idx+=32) |
| { |
| if(idx < 512+16) |
| decwin[idx+16] = decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) 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) |
| decwin[idx+16] = decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) scaleval); |
| |
| if(i % 32 == 31) |
| idx -= 1023; |
| if(i % 64 == 63) |
| scaleval = - scaleval; |
| } |
| } |
| #endif |
| |
| #if 0 |
| int make_conv16to8_table(int mode) |
| { |
| int i; |
| |
| /* |
| * ????: 8.0 is right but on SB cards '2.0' is a better value ??? |
| */ |
| const double mul = 8.0; |
| |
| if(!conv16to8_buf) { |
| conv16to8_buf = (unsigned char *) malloc(8192); |
| if(!conv16to8_buf) { |
| error("Can't allocate 16 to 8 converter table!"); |
| return -1; |
| } |
| conv16to8 = conv16to8_buf + 4096; |
| } |
| |
| if(mode == AUDIO_FORMAT_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) |
| fprintf(stderr,"Converror %d %d\n",i,c1); |
| if(c1 == 0) |
| c1 = 2; |
| conv16to8[i] = (unsigned char) c1; |
| } |
| } |
| else if(mode == AUDIO_FORMAT_SIGNED_8) { |
| for(i=-4096;i<4096;i++) { |
| conv16to8[i] = i>>5; |
| } |
| } |
| else if(mode == AUDIO_FORMAT_UNSIGNED_8) { |
| for(i=-4096;i<4096;i++) { |
| conv16to8[i] = (i>>5)+128; |
| } |
| } |
| else { |
| for(i=-4096;i<4096;i++) { |
| conv16to8[i] = 0; |
| } |
| } |
| return 0; |
| } |
| |
| |
| #endif |