Diffstat (limited to 'core/multimedia/opieplayer/libmpeg3/audio/tables.c') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | core/multimedia/opieplayer/libmpeg3/audio/tables.c | 554 |
1 files changed, 554 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/libmpeg3/audio/tables.c b/core/multimedia/opieplayer/libmpeg3/audio/tables.c new file mode 100644 index 0000000..aeab335 --- a/dev/null +++ b/core/multimedia/opieplayer/libmpeg3/audio/tables.c @@ -0,0 +1,554 @@ +#include "mpeg3audio.h" +#include "../libmpeg3.h" +#include "../mpeg3protos.h" +#include "tables.h" + +#include <math.h> + +/* Bitrate indexes */ +int mpeg3_tabsel_123[2][3][16] = { + { {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,}, + {0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,}, + {0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} }, + + { {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,}, + {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,}, + {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} } +}; + +long mpeg3_freqs[9] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 , 12000 , 8000 }; + +#ifdef USE_3DNOW +mpeg3_real_t mpeg3_decwin[2 * (512 + 32)]; +mpeg3_real_t mpeg3_cos64[32], mpeg3_cos32[16], mpeg3_cos16[8], mpeg3_cos8[4], mpeg3_cos4[2]; +#else +mpeg3_real_t mpeg3_decwin[512 + 32]; +mpeg3_real_t mpeg3_cos64[16], mpeg3_cos32[8], mpeg3_cos16[4], mpeg3_cos8[2], mpeg3_cos4[1]; +#endif + +mpeg3_real_t *mpeg3_pnts[] = { mpeg3_cos64, mpeg3_cos32, mpeg3_cos16, mpeg3_cos8, mpeg3_cos4 }; + +int mpeg3_grp_3tab[32 * 3] = { 0, }; /* used: 27 */ +int mpeg3_grp_5tab[128 * 3] = { 0, }; /* used: 125 */ +int mpeg3_grp_9tab[1024 * 3] = { 0, }; /* used: 729 */ + +REAL_MATRIX(mpeg3_muls, [27], [64]); /* also used by layer 1 */ +REAL_MATRIX(mpeg3_gainpow2, [256 + 118 + 4], ); +REAL_MATRIX(mpeg3_ispow, [8207], ); +REAL_MATRIX(mpeg3_aa_ca, [8], ); +REAL_MATRIX(mpeg3_aa_cs, [8], ); +REAL_MATRIX(mpeg3_win, [4], [36]); +REAL_MATRIX(mpeg3_win1, [4], [36]); +REAL_MATRIX(mpeg3_COS1, [12], [6]); +REAL_MATRIX(mpeg3_COS9, [9], ); +REAL_MATRIX(mpeg3_tfcos36, [9], ); +REAL_MATRIX(mpeg3_tfcos12, [3], ); +REAL_MATRIX(mpeg3_cos9, [3], ); +REAL_MATRIX(mpeg3_cos18, [3], ); +REAL_MATRIX(mpeg3_tan1_1, [16], ); +REAL_MATRIX(mpeg3_tan2_1, [16], ); +REAL_MATRIX(mpeg3_tan1_2, [16], ); +REAL_MATRIX(mpeg3_tan2_2, [16], ); +REAL_MATRIX(mpeg3_pow1_1, [2], [16]); +REAL_MATRIX(mpeg3_pow2_1, [2], [16]); +REAL_MATRIX(mpeg3_pow1_2, [2], [16]); +REAL_MATRIX(mpeg3_pow2_2, [2], [16]); + +mpeg3_real_t mpeg3_COS6_1, mpeg3_COS6_2; + +#ifdef PRINT_FIXED_POINT_TABLES +static void print_table(const char* var, mpeg3_real_t* data, int count) +{ + int i; + printf("#ifdef USE_DATA_TABLES\n"); + printf("static long %s_data[] = {",var); + for(i = 0; i < count; i++) { + printf("%c0x%08x,", i%8?' ':'\n', data[i].fixedPoint()); + } + printf("};\n"); + printf("#endif\n"); +} +#endif + +#ifdef PRINT_FIXED_POINT_TABLES +# define DO_TABLE(T) print_table(#T, T, sizeof(T)/sizeof(mpeg3_real_t)) +# define DO_TABLE2(T,DIM) print_table(#T, (mpeg3_real_t*)T, sizeof(T)/sizeof(mpeg3_real_t)) +#elif USE_FIXED_POINT +# define DO_TABLE(T) T = (mpeg3_real_t*)T##_data + // multidimensional +# define DO_TABLE2(T,DIM) T = (mpeg3_real_t(*)DIM)T##_data +#else +# define DO_TABLE(T) +# define DO_TABLE2(T,DIM) +#endif + +#if defined(USE_FIXED_POINT) && !defined(PRINT_FIXED_POINT_TABLES) +#define USE_DATA_TABLES +#include "fptables.h" +#endif + +long mpeg3_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 }; + +int mpeg3_longLimit[9][23]; +int mpeg3_shortLimit[9][14]; + +struct mpeg3_bandInfoStruct mpeg3_bandInfo[9] = +{ + +/* MPEG 1.0 */ + { {0,4,8,12,16,20,24,30,36,44,52,62,74, 90,110,134,162,196,238,288,342,418,576}, + {4,4,4,4,4,4,6,6,8, 8,10,12,16,20,24,28,34,42,50,54, 76,158}, + {0,4*3,8*3,12*3,16*3,22*3,30*3,40*3,52*3,66*3, 84*3,106*3,136*3,192*3}, + {4,4,4,4,6,8,10,12,14,18,22,30,56} } , + + { {0,4,8,12,16,20,24,30,36,42,50,60,72, 88,106,128,156,190,230,276,330,384,576}, + {4,4,4,4,4,4,6,6,6, 8,10,12,16,18,22,28,34,40,46,54, 54,192}, + {0,4*3,8*3,12*3,16*3,22*3,28*3,38*3,50*3,64*3, 80*3,100*3,126*3,192*3}, + {4,4,4,4,6,6,10,12,14,16,20,26,66} } , + + { {0,4,8,12,16,20,24,30,36,44,54,66,82,102,126,156,194,240,296,364,448,550,576} , + {4,4,4,4,4,4,6,6,8,10,12,16,20,24,30,38,46,56,68,84,102, 26} , + {0,4*3,8*3,12*3,16*3,22*3,30*3,42*3,58*3,78*3,104*3,138*3,180*3,192*3} , + {4,4,4,4,6,8,12,16,20,26,34,42,12} } , + +/* MPEG 2.0 */ + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 } , + {0,4*3,8*3,12*3,18*3,24*3,32*3,42*3,56*3,74*3,100*3,132*3,174*3,192*3} , + {4,4,4,6,6,8,10,14,18,26,32,42,18 } } , + + { {0,6,12,18,24,30,36,44,54,66,80,96,114,136,162,194,232,278,330,394,464,540,576}, + {6,6,6,6,6,6,8,10,12,14,16,18,22,26,32,38,46,52,64,70,76,36 } , + {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,136*3,180*3,192*3} , + {4,4,4,6,8,10,12,14,18,24,32,44,12 } } , + + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576}, + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54 }, + {0,4*3,8*3,12*3,18*3,26*3,36*3,48*3,62*3,80*3,104*3,134*3,174*3,192*3}, + {4,4,4,6,8,10,12,14,18,24,30,40,18 } } , +/* MPEG 2.5 */ + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, + {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, + {4,4,4,6,8,10,12,14,18,24,30,40,18} }, + { {0,6,12,18,24,30,36,44,54,66,80,96,116,140,168,200,238,284,336,396,464,522,576} , + {6,6,6,6,6,6,8,10,12,14,16,20,24,28,32,38,46,52,60,68,58,54}, + {0,12,24,36,54,78,108,144,186,240,312,402,522,576}, + {4,4,4,6,8,10,12,14,18,24,30,40,18} }, + { {0,12,24,36,48,60,72,88,108,132,160,192,232,280,336,400,476,566,568,570,572,574,576}, + {12,12,12,12,12,12,16,20,24,28,32,40,48,56,64,76,90,2,2,2,2,2}, + {0, 24, 48, 72,108,156,216,288,372,480,486,492,498,576}, + {8,8,8,12,16,20,24,28,36,2,2,2,26} } , +}; + +int mpeg3_mapbuf0[9][152]; +int mpeg3_mapbuf1[9][156]; +int mpeg3_mapbuf2[9][44]; +int *mpeg3_map[9][3]; +int *mpeg3_mapend[9][3]; + +unsigned int mpeg3_n_slen2[512]; /* MPEG 2.0 slen for 'normal' mode */ +unsigned int mpeg3_i_slen2[256]; /* MPEG 2.0 slen for intensity stereo */ + +int mpeg3audio_init_layer3(mpeg3audio_t *audio); + +int mpeg3audio_init_layer2(mpeg3audio_t *audio) +{ + static double mulmul[27] = + { + 0.0 , -2.0/3.0 , 2.0/3.0 , + 2.0/7.0 , 2.0/15.0 , 2.0/31.0, 2.0/63.0 , 2.0/127.0 , 2.0/255.0 , + 2.0/511.0 , 2.0/1023.0 , 2.0/2047.0 , 2.0/4095.0 , 2.0/8191.0 , + 2.0/16383.0 , 2.0/32767.0 , 2.0/65535.0 , + -4.0/5.0 , -2.0/5.0 , 2.0/5.0, 4.0/5.0 , + -8.0/9.0 , -4.0/9.0 , -2.0/9.0 , 2.0/9.0 , 4.0/9.0 , 8.0/9.0 + }; + static int base[3][9] = + { + { 1 , 0, 2 , } , + { 17, 18, 0 , 19, 20 , } , + { 21, 1, 22, 23, 0, 24, 25, 2, 26 } + }; + static int tablen[3] = { 3, 5, 9 }; + static int *itable, *tables[3] = {mpeg3_grp_3tab, mpeg3_grp_5tab, mpeg3_grp_9tab}; + int i, j, k, l, len; + mpeg3_real_t *table; + + for(i = 0; i < 3; i++) + { + itable = tables[i]; + len = tablen[i]; + for(j = 0; j < len; j++) + for(k = 0; k < len; k++) + for(l = 0; l < len; l++) + { + *itable++ = base[i][l]; + *itable++ = base[i][k]; + *itable++ = base[i][j]; + } + } + +#if !defined(USE_FIXED_POINT) || defined(PRINT_FIXED_POINT_TABLES) +#if defined(PRINT_FIXED_POINT_TABLES) + //mpeg3audio_init_layer3(audio); // we depend on mpeg3_muls table +#endif + for(k = 0; k < 27; k++) + { + double m = mulmul[k]; + table = mpeg3_muls[k]; + for(j = 3, i = 0; i < 63; i++, j--) + *table++ = m * pow(2.0, (double)j / 3.0); + *table++ = 0.0; + } +#endif + DO_TABLE2(mpeg3_muls,[64]); + return 0; +} + +int mpeg3audio_init_layer3(mpeg3audio_t *audio) +{ + int i, j, k, l; + int down_sample_sblimit = 32; + + audio->mp3_block[0][0][0] = 0; + audio->mp3_blc[0] = 0; + audio->mp3_blc[1] = 0; + +#if !defined(USE_FIXED_POINT) || defined(PRINT_FIXED_POINT_TABLES) + for(i = -256; i < 118 + 4; i++) + mpeg3_gainpow2[i + 256] = pow((double)2.0, -0.25 * (double)(i + 210)); + + for(i = 0; i < 8207; i++) + mpeg3_ispow[i] = pow((double)i, (double)4.0 / 3.0); + + for(i = 0; i < 8; i++) + { + static double Ci[8] = {-0.6,-0.535,-0.33,-0.185,-0.095,-0.041,-0.0142,-0.0037}; + double sq = sqrt(1.0+Ci[i]*Ci[i]); + mpeg3_aa_cs[i] = 1.0/sq; + mpeg3_aa_ca[i] = Ci[i]/sq; + } + + for(i = 0; i < 18; i++) + { + mpeg3_win[0][i] = mpeg3_win[1][i] = 0.5 * sin( M_PI / 72.0 * (double)(2 * (i + 0) + 1) ) / cos (M_PI * (double)(2 * (i + 0) + 19) / 72.0); + mpeg3_win[0][i+18] = mpeg3_win[3][i+18] = 0.5 * sin( M_PI / 72.0 * (double)(2 * (i + 18) + 1) ) / cos (M_PI * (double)(2 * (i + 18) + 19) / 72.0); + } + for(i = 0; i < 6; i++) + { + mpeg3_win[1][i + 18] = 0.5 / cos ( M_PI * (double) (2*(i+18)+19) / 72.0 ); + mpeg3_win[3][i + 12] = 0.5 / cos ( M_PI * (double) (2*(i+12)+19) / 72.0 ); + mpeg3_win[1][i + 24] = 0.5 * sin( M_PI / 24.0 * (double)(2 * i + 13) ) / cos (M_PI * (double)(2 * (i + 24)+ 19) / 72.0 ); + mpeg3_win[1][i + 30] = mpeg3_win[3][i] = 0.0; + mpeg3_win[3][i + 6 ] = 0.5 * sin( M_PI / 24.0 * (double)(2 * i + 1) ) / cos (M_PI * (double)(2 * (i + 6 )+ 19) / 72.0 ); + } + + for(i = 0; i < 9; i++) + mpeg3_COS9[i] = cos(M_PI / 18.0 * (double)i); + + for(i = 0; i < 9; i++) + mpeg3_tfcos36[i] = 0.5 / cos (M_PI * (double) (i*2+1) / 36.0); + for(i = 0; i < 3; i++) + mpeg3_tfcos12[i] = 0.5 / cos (M_PI * (double) (i*2+1) / 12.0); + + mpeg3_cos9[0] = cos(1.0 * M_PI / 9.0); + mpeg3_cos9[1] = cos(5.0 * M_PI / 9.0); + mpeg3_cos9[2] = cos(7.0 * M_PI / 9.0); + mpeg3_cos18[0] = cos(1.0 * M_PI / 18.0); + mpeg3_cos18[1] = cos(11.0 * M_PI / 18.0); + mpeg3_cos18[2] = cos(13.0 * M_PI / 18.0); + + for(i = 0; i < 12; i++) + { + mpeg3_win[2][i] = 0.5 * sin(M_PI / 24.0 * (double) (2 * i + 1)) / cos(M_PI * (double)(2 * i + 7) / 24.0); + for(j = 0; j < 6; j++) + mpeg3_COS1[i][j] = cos(M_PI / 24.0 * (double) ((2 * i + 7) * (2 * j + 1))); + } + + for(j = 0; j < 4; j++) + { + static int len[4] = {36, 36, 12, 36}; + for(i = 0; i < len[j]; i += 2) + mpeg3_win1[j][i] = + mpeg3_win[j][i]; + for(i = 1; i < len[j]; i += 2) + mpeg3_win1[j][i] = - mpeg3_win[j][i]; + } + + for(i = 0; i < 16; i++) + { + double t = tan( (double) i * M_PI / 12.0 ); + mpeg3_tan1_1[i] = t / (1.0 + t); + mpeg3_tan2_1[i] = 1.0 / (1.0 + t); + mpeg3_tan1_2[i] = M_SQRT2 * t / (1.0 + t); + mpeg3_tan2_2[i] = M_SQRT2 / (1.0 + t); + + for(j = 0; j < 2; j++) + { + double base = pow(2.0, -0.25 * (j + 1.0)); + double p1 = 1.0,p2 = 1.0; + if(i > 0) + { + if( i & 1 ) + p1 = pow(base, (i + 1.0) * 0.5); + else + p2 = pow(base, i * 0.5); + } + mpeg3_pow1_1[j][i] = p1; + mpeg3_pow2_1[j][i] = p2; + mpeg3_pow1_2[j][i] = M_SQRT2 * p1; + mpeg3_pow2_2[j][i] = M_SQRT2 * p2; + } + } + +#endif + + DO_TABLE(mpeg3_gainpow2); + DO_TABLE(mpeg3_ispow); + DO_TABLE(mpeg3_aa_cs); + DO_TABLE(mpeg3_aa_ca); + DO_TABLE2(mpeg3_win,[36]); + DO_TABLE(mpeg3_COS9); + DO_TABLE(mpeg3_tfcos36); + DO_TABLE(mpeg3_tfcos12); + DO_TABLE(mpeg3_cos9); + DO_TABLE(mpeg3_cos18); + DO_TABLE2(mpeg3_COS1,[6]); + DO_TABLE2(mpeg3_win1,[36]); + DO_TABLE(mpeg3_tan1_1); + DO_TABLE(mpeg3_tan2_1); + DO_TABLE(mpeg3_tan1_2); + DO_TABLE(mpeg3_tan2_2); + DO_TABLE2(mpeg3_pow1_1,[16]); + DO_TABLE2(mpeg3_pow2_1,[16]); + DO_TABLE2(mpeg3_pow1_2,[16]); + DO_TABLE2(mpeg3_pow2_2,[16]); + + mpeg3_COS6_1 = cos( M_PI / 6.0 * (double) 1); + mpeg3_COS6_2 = cos( M_PI / 6.0 * (double) 2); + + for(j = 0; j < 9; j++) + { + struct mpeg3_bandInfoStruct *bi = &mpeg3_bandInfo[j]; + int *mp; + int cb,lwin; + int *bdf; + + mp = mpeg3_map[j][0] = mpeg3_mapbuf0[j]; + bdf = bi->longDiff; + for(i = 0, cb = 0; cb < 8; cb++, i += *bdf++) + { + *mp++ = (*bdf) >> 1; + *mp++ = i; + *mp++ = 3; + *mp++ = cb; + } + bdf = bi->shortDiff + 3; + for(cb = 3; cb < 13; cb++) + { + int l = (*bdf++) >> 1; + for(lwin = 0; lwin < 3; lwin++) + { + *mp++ = l; + *mp++ = i + lwin; + *mp++ = lwin; + *mp++ = cb; + } + i += 6 * l; + } + mpeg3_mapend[j][0] = mp; + + mp = mpeg3_map[j][1] = mpeg3_mapbuf1[j]; + bdf = bi->shortDiff+0; + for(i = 0,cb = 0; cb < 13; cb++) + { + int l = (*bdf++) >> 1; + for(lwin = 0; lwin < 3; lwin++) + { + *mp++ = l; + *mp++ = i + lwin; + *mp++ = lwin; + *mp++ = cb; + } + i += 6 * l; + } + mpeg3_mapend[j][1] = mp; + + mp = mpeg3_map[j][2] = mpeg3_mapbuf2[j]; + bdf = bi->longDiff; + for(cb = 0; cb < 22 ; cb++) + { + *mp++ = (*bdf++) >> 1; + *mp++ = cb; + } + mpeg3_mapend[j][2] = mp; + } + + for(j = 0; j < 9; j++) + { + for(i = 0; i < 23; i++) + { + mpeg3_longLimit[j][i] = (mpeg3_bandInfo[j].longIdx[i] - 1 + 8) / 18 + 1; + if(mpeg3_longLimit[j][i] > (down_sample_sblimit)) + mpeg3_longLimit[j][i] = down_sample_sblimit; + } + for(i = 0; i < 14; i++) + { + mpeg3_shortLimit[j][i] = (mpeg3_bandInfo[j].shortIdx[i] - 1) / 18 + 1; + if(mpeg3_shortLimit[j][i] > (down_sample_sblimit) ) + mpeg3_shortLimit[j][i] = down_sample_sblimit; + } + } + + for(i = 0; i < 5; i++) + { + for(j = 0; j < 6; j++) + { + for(k = 0; k < 6; k++) + { + int n = k + j * 6 + i * 36; + mpeg3_i_slen2[n] = i | (j << 3) | (k << 6) | (3 << 12); + } + } + } + for(i = 0; i < 4; i++) + { + for(j = 0; j < 4; j++) + { + for(k = 0; k < 4; k++) + { + int n = k + j * 4 + i * 16; + mpeg3_i_slen2[n+180] = i | (j << 3) | (k << 6) | (4 << 12); + } + } + } + for(i = 0; i < 4; i++) + { + for(j = 0; j < 3; j++) + { + int n = j + i * 3; + mpeg3_i_slen2[n + 244] = i | (j << 3) | (5 << 12); + mpeg3_n_slen2[n + 500] = i | (j << 3) | (2 << 12) | (1 << 15); + } + } + + for(i = 0; i < 5; i++) + { + for(j = 0; j < 5; j++) + { + for(k = 0; k < 4; k++) + { + for(l = 0; l < 4; l++) + { + int n = l + k * 4 + j * 16 + i * 80; + mpeg3_n_slen2[n] = i | (j << 3) | ( k << 6) | (l << 9) | (0 << 12); + } + } + } + } + for(i = 0; i < 5; i++) + { + for(j = 0; j < 5; j++) + { + for(k = 0; k < 4; k++) + { + int n = k + j * 4 + i * 20; + mpeg3_n_slen2[n + 400] = i | (j << 3) | (k << 6) | (1 << 12); + } + } + } + + return 0; +} + +int mpeg3audio_new_decode_tables(mpeg3audio_t *audio) +{ + int i, j, k, kr, divv; + mpeg3_real_t *costab; + int idx; + long scaleval = audio->outscale; + + + for(i = 0; i < 5; i++) + { + kr = 0x10 >> i; + divv = 0x40 >> i; + costab = mpeg3_pnts[i]; + for(k = 0; k < kr; k++) + costab[k] = 1.0 / (2.0 * cos(M_PI * ((double)k * 2.0 + 1.0) / (double)divv)); + +#ifdef USE_3DNOW + for(k = 0; k < kr; k++) + costab[k + kr] = -costab[k]; +#endif + + } + + idx = 0; + scaleval = -scaleval; + for(i = 0, j = 0; i < 256; i++, j++,idx += 32) + { + if(idx < 512 + 16) + mpeg3_decwin[idx+16] = mpeg3_decwin[idx] = (double)mpeg3_intwinbase[j] / 65536.0 * (double)scaleval; + + if(i % 32 == 31) + idx -= 1023; + if(i % 64 == 63) + scaleval = -scaleval; + } + + for( ; i < 512; i++, j--, idx += 32) + { + if(idx < 512 + 16) + mpeg3_decwin[idx + 16] = mpeg3_decwin[idx] = (double)mpeg3_intwinbase[j] / 65536.0 * (double)scaleval; + + if(i % 32 == 31) + idx -= 1023; + if(i % 64 == 63) + scaleval = -scaleval; + } + +#ifdef USE_3DNOW + if(!param.down_sample) + { + for(i = 0; i < 512 + 32; i++) + { + mpeg3_decwin[512 + 31 - i] *= 65536.0; /* allows faster clipping in 3dnow code */ + mpeg3_decwin[512 + 32 + i] = mpeg3_decwin[512 + 31 - i]; + } + } +#endif + +/* Initialize AC3 */ + audio->ac3_lfsr_state = 1; + mpeg3audio_imdct_init(audio); +/* Initialize MPEG */ + mpeg3audio_init_layer2(audio); /* inits also shared tables with layer1 */ + mpeg3audio_init_layer3(audio); + return 0; +} |