1 /* 2 ** 3 ** File: fmopl.c -- software implementation of FM sound generator 4 ** 5 ** Copyright (C) 1999 Tatsuyuki Satoh , MultiArcadeMachineEmurator development 6 ** 7 ** Version 0.36f 8 ** 9 */ 10 11 /* 12 preliminary : 13 Problem : 14 note: 15 */ 16 17 #include <stdio.h> 18 #include <stdlib.h> 19 #include <string.h> 20 #include <stdarg.h> 21 //#include "driver.h" /* use M.A.M.E. */ 22 #include "fmopl.h" 23 #include <math.h> 24 25 /* MPC - hacks */ 26 #include "types.h" 27 #include "log.h" 28 29 #ifndef PI 30 #define PI 3.14159265358979323846 31 #endif 32 33 /* -------------------- preliminary define section --------------------- */ 34 /* attack/decay rate time rate */ 35 #define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */ 36 #define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */ 37 38 #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */ 39 40 #define FREQ_BITS 24 /* frequency turn */ 41 42 /* counter bits = 20 , octerve 7 */ 43 #define FREQ_RATE (1<<(FREQ_BITS-20)) 44 #define TL_BITS (FREQ_BITS+2) 45 46 /* final output shift , limit minimum and maximum */ 47 #define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */ 48 #define OPL_MAXOUT (0x7fff<<OPL_OUTSB) 49 #define OPL_MINOUT (-0x8000<<OPL_OUTSB) 50 51 /* -------------------- quality selection --------------------- */ 52 53 /* sinwave entries */ 54 /* used static memory = SIN_ENT * 4 (byte) */ 55 #define SIN_ENT 2048 56 57 /* output level entries (envelope,sinwave) */ 58 /* envelope counter lower bits */ 59 #define ENV_BITS 16 60 /* envelope output entries */ 61 #define EG_ENT 4096 62 /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */ 63 /* used static memory = EG_ENT*4 (byte) */ 64 65 #define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */ 66 #define EG_DED EG_OFF 67 #define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */ 68 #define EG_AED EG_DST 69 #define EG_AST 0 /* ATTACK START */ 70 71 #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */ 72 73 /* LFO table entries */ 74 #define VIB_ENT 512 75 #define VIB_SHIFT (32-9) 76 #define AMS_ENT 512 77 #define AMS_SHIFT (32-9) 78 79 #define VIB_RATE 256 80 81 /* -------------------- local defines , macros --------------------- */ 82 83 /* register number to channel number , slot offset */ 84 #define SLOT1 0 85 #define SLOT2 1 86 87 /* envelope phase */ 88 #define ENV_MOD_RR 0x00 89 #define ENV_MOD_DR 0x01 90 #define ENV_MOD_AR 0x02 91 92 /* -------------------- tables --------------------- */ 93 static const int slot_array[32]= 94 { 95 0, 2, 4, 1, 3, 5,-1,-1, 96 6, 8,10, 7, 9,11,-1,-1, 97 12,14,16,13,15,17,-1,-1, 98 -1,-1,-1,-1,-1,-1,-1,-1 99 }; 100 101 /* key scale level */ 102 #define ML(x) ((UINT32)((x)*0.1875*2/EG_STEP)) 103 static const UINT32 KSL_TABLE[8*16]= 104 { 105 /* OCT 0 */ 106 ML(0.000), ML(0.000), ML(0.000), ML(0.000), 107 ML(0.000), ML(0.000), ML(0.000), ML(0.000), 108 ML(0.000), ML(0.000), ML(0.000), ML(0.000), 109 ML(0.000), ML(0.000), ML(0.000), ML(0.000), 110 /* OCT 1 */ 111 ML(0.000), ML(0.000), ML(0.000), ML(0.000), 112 ML(0.000), ML(0.000), ML(0.000), ML(0.000), 113 ML(0.000), ML(0.750), ML(1.125), ML(1.500), 114 ML(1.875), ML(2.250), ML(2.625), ML(3.000), 115 /* OCT 2 */ 116 ML(0.000), ML(0.000), ML(0.000), ML(0.000), 117 ML(0.000), ML(1.125), ML(1.875), ML(2.625), 118 ML(3.000), ML(3.750), ML(4.125), ML(4.500), 119 ML(4.875), ML(5.250), ML(5.625), ML(6.000), 120 /* OCT 3 */ 121 ML(0.000), ML(0.000), ML(0.000), ML(1.875), 122 ML(3.000), ML(4.125), ML(4.875), ML(5.625), 123 ML(6.000), ML(6.750), ML(7.125), ML(7.500), 124 ML(7.875), ML(8.250), ML(8.625), ML(9.000), 125 /* OCT 4 */ 126 ML(0.000), ML(0.000), ML(3.000), ML(4.875), 127 ML(6.000), ML(7.125), ML(7.875), ML(8.625), 128 ML(9.000), ML(9.750),ML(10.125),ML(10.500), 129 ML(10.875),ML(11.250),ML(11.625),ML(12.000), 130 /* OCT 5 */ 131 ML(0.000), ML(3.000), ML(6.000), ML(7.875), 132 ML(9.000),ML(10.125),ML(10.875),ML(11.625), 133 ML(12.000),ML(12.750),ML(13.125),ML(13.500), 134 ML(13.875),ML(14.250),ML(14.625),ML(15.000), 135 /* OCT 6 */ 136 ML(0.000), ML(6.000), ML(9.000),ML(10.875), 137 ML(12.000),ML(13.125),ML(13.875),ML(14.625), 138 ML(15.000),ML(15.750),ML(16.125),ML(16.500), 139 ML(16.875),ML(17.250),ML(17.625),ML(18.000), 140 /* OCT 7 */ 141 ML(0.000), ML(9.000),ML(12.000),ML(13.875), 142 ML(15.000),ML(16.125),ML(16.875),ML(17.625), 143 ML(18.000),ML(18.750),ML(19.125),ML(19.500), 144 ML(19.875),ML(20.250),ML(20.625),ML(21.000) 145 }; 146 #undef ML 147 148 /* sustain lebel table (3db per step) */ 149 /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/ 150 #define SC(db) ((INT32) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST) 151 static const INT32 SL_TABLE[16]={ 152 SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), 153 SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) 154 }; 155 #undef SC 156 157 #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */ 158 /* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */ 159 /* TL_TABLE[ 0 to TL_MAX ] : plus section */ 160 /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */ 161 static INT32 *TL_TABLE; 162 163 /* pointers to TL_TABLE with sinwave output offset */ 164 static INT32 **SIN_TABLE; 165 166 /* LFO table */ 167 static INT32 *AMS_TABLE; 168 static INT32 *VIB_TABLE; 169 170 /* envelope output curve table */ 171 /* attack + decay + OFF */ 172 static INT32 ENV_CURVE[2*EG_ENT+1]; 173 174 /* multiple table */ 175 #define ML(x) ((UINT32) (2*(x))) 176 static const UINT32 MUL_TABLE[16]= { 177 /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */ 178 ML(0.50), ML(1.00), ML(2.00), ML(3.00), ML(4.00), ML(5.00), ML(6.00), ML(7.00), 179 ML(8.00), ML(9.00),ML(10.00),ML(10.00),ML(12.00),ML(12.00),ML(15.00),ML(15.00) 180 }; 181 #undef ML 182 183 /* dummy attack / decay rate ( when rate == 0 ) */ 184 static INT32 RATE_0[16]= 185 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; 186 187 /* -------------------- static state --------------------- */ 188 189 /* lock level of common table */ 190 static int num_lock = 0; 191 192 /* work table */ 193 static void *cur_chip = NULL; /* current chip point */ 194 /* currenct chip state */ 195 /* static FMSAMPLE *bufL,*bufR; */ 196 static OPL_CH *S_CH; 197 static OPL_CH *E_CH; 198 OPL_SLOT *SLOT7_1,*SLOT7_2,*SLOT8_1,*SLOT8_2; 199 200 static INT32 outd[1]; 201 static INT32 ams; 202 static INT32 vib; 203 INT32 *ams_table; 204 INT32 *vib_table; 205 static INT32 amsIncr; 206 static INT32 vibIncr; 207 static INT32 feedback2; /* connect for SLOT 2 */ 208 209 /* log output level */ 210 #define LOG_ERR 3 /* ERROR */ 211 #define LOG_WAR 2 /* WARNING */ 212 #define LOG_INF 1 /* INFORMATION */ 213 214 #define LOG_LEVEL LOG_INF 215 216 //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x 217 #define LOG(n,x) if( (n)>=LOG_LEVEL ) log_printf x 218 219 /* --------------------- subroutines --------------------- */ 220 221 /* There's no good reason why I should have to do this, but using "pow" 222 (the POSIX fuction) causes it to not compile on my machine 223 --Matthew Strait */ 224 double mypow(float base, int power) 225 { 226 int ans = 1, k; 227 228 for( k = 0; k < power; k++) 229 ans *= base; 230 231 return ans; 232 } 233 234 INLINE int Limit( int val, int max, int min ) { 235 if ( val > max ) 236 val = max; 237 else if ( val < min ) 238 val = min; 239 240 return val; 241 } 242 243 /* status set and IRQ handling */ 244 INLINE void OPL_STATUS_SET(FM_OPL *OPL,int flag) 245 { 246 /* set status flag */ 247 OPL->status |= flag; 248 if(!(OPL->status & 0x80)) 249 { 250 if(OPL->status & OPL->statusmask) 251 { /* IRQ on */ 252 OPL->status |= 0x80; 253 /* callback user interrupt handler (IRQ is OFF to ON) */ 254 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1); 255 } 256 } 257 } 258 259 /* status reset and IRQ handling */ 260 INLINE void OPL_STATUS_RESET(FM_OPL *OPL,int flag) 261 { 262 /* reset status flag */ 263 OPL->status &=~flag; 264 if((OPL->status & 0x80)) 265 { 266 if (!(OPL->status & OPL->statusmask) ) 267 { 268 OPL->status &= 0x7f; 269 /* callback user interrupt handler (IRQ is ON to OFF) */ 270 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0); 271 } 272 } 273 } 274 275 /* IRQ mask set */ 276 INLINE void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) 277 { 278 OPL->statusmask = flag; 279 /* IRQ handling check */ 280 OPL_STATUS_SET(OPL,0); 281 OPL_STATUS_RESET(OPL,0); 282 } 283 284 /* ----- key on ----- */ 285 INLINE void OPL_KEYON(OPL_SLOT *SLOT) 286 { 287 /* sin wave restart */ 288 SLOT->Cnt = 0; 289 /* set attack */ 290 SLOT->evm = ENV_MOD_AR; 291 SLOT->evs = SLOT->evsa; 292 SLOT->evc = EG_AST; 293 SLOT->eve = EG_AED; 294 } 295 /* ----- key off ----- */ 296 INLINE void OPL_KEYOFF(OPL_SLOT *SLOT) 297 { 298 if( SLOT->evm > ENV_MOD_RR) 299 { 300 /* set envelope counter from envleope output */ 301 SLOT->evm = ENV_MOD_RR; 302 if( !(SLOT->evc&EG_DST) ) 303 //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST; 304 SLOT->evc = EG_DST; 305 SLOT->eve = EG_DED; 306 SLOT->evs = SLOT->evsr; 307 } 308 } 309 310 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */ 311 /* return : envelope output */ 312 INLINE UINT32 OPL_CALC_SLOT( OPL_SLOT *SLOT ) 313 { 314 /* calcrate envelope generator */ 315 if( (SLOT->evc+=SLOT->evs) >= SLOT->eve ) 316 { 317 switch( SLOT->evm ){ 318 case ENV_MOD_AR: /* ATTACK -> DECAY1 */ 319 /* next DR */ 320 SLOT->evm = ENV_MOD_DR; 321 SLOT->evc = EG_DST; 322 SLOT->eve = SLOT->SL; 323 SLOT->evs = SLOT->evsd; 324 break; 325 case ENV_MOD_DR: /* DECAY -> SL or RR */ 326 SLOT->evc = SLOT->SL; 327 SLOT->eve = EG_DED; 328 if(SLOT->eg_typ) 329 { 330 SLOT->evs = 0; 331 } 332 else 333 { 334 SLOT->evm = ENV_MOD_RR; 335 SLOT->evs = SLOT->evsr; 336 } 337 break; 338 case ENV_MOD_RR: /* RR -> OFF */ 339 SLOT->evc = EG_OFF; 340 SLOT->eve = EG_OFF+1; 341 SLOT->evs = 0; 342 break; 343 } 344 } 345 /* calcrate envelope */ 346 return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0); 347 } 348 349 /* set algorythm connection */ 350 static void set_algorythm( OPL_CH *CH) 351 { 352 INT32 *carrier = &outd[0]; 353 CH->connect1 = CH->CON ? carrier : &feedback2; 354 CH->connect2 = carrier; 355 } 356 357 /* ---------- frequency counter for operater update ---------- */ 358 INLINE void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT) 359 { 360 int ksr; 361 362 /* frequency step counter */ 363 SLOT->Incr = CH->fc * SLOT->mul; 364 ksr = CH->kcode >> SLOT->KSR; 365 366 if( SLOT->ksr != ksr ) 367 { 368 SLOT->ksr = ksr; 369 /* attack , decay rate recalcration */ 370 SLOT->evsa = SLOT->AR[ksr]; 371 SLOT->evsd = SLOT->DR[ksr]; 372 SLOT->evsr = SLOT->RR[ksr]; 373 } 374 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 375 } 376 377 /* set multi,am,vib,EG-TYP,KSR,mul */ 378 INLINE void set_mul(FM_OPL *OPL,int slot,int v) 379 { 380 OPL_CH *CH = &OPL->P_CH[slot/2]; 381 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 382 383 SLOT->mul = MUL_TABLE[v&0x0f]; 384 SLOT->KSR = (v&0x10) ? 0 : 2; 385 SLOT->eg_typ = (v&0x20)>>5; 386 SLOT->vib = (v&0x40); 387 SLOT->ams = (v&0x80); 388 CALC_FCSLOT(CH,SLOT); 389 } 390 391 /* set ksl & tl */ 392 INLINE void set_ksl_tl(FM_OPL *OPL,int slot,int v) 393 { 394 OPL_CH *CH = &OPL->P_CH[slot/2]; 395 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 396 int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */ 397 398 SLOT->ksl = ksl ? 3-ksl : 31; 399 SLOT->TL = (INT32) (((v&0x3f)*(0.75/EG_STEP))); /* 0.75db step */ 400 401 if( !(OPL->mode&0x80) ) 402 { /* not CSM latch total level */ 403 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 404 } 405 } 406 407 /* set attack rate & decay rate */ 408 INLINE void set_ar_dr(FM_OPL *OPL,int slot,int v) 409 { 410 OPL_CH *CH = &OPL->P_CH[slot/2]; 411 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 412 int ar = v>>4; 413 int dr = v&0x0f; 414 415 SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0; 416 SLOT->evsa = SLOT->AR[SLOT->ksr]; 417 if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa; 418 419 SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0; 420 SLOT->evsd = SLOT->DR[SLOT->ksr]; 421 if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd; 422 } 423 424 /* set sustain level & release rate */ 425 INLINE void set_sl_rr(FM_OPL *OPL,int slot,int v) 426 { 427 OPL_CH *CH = &OPL->P_CH[slot/2]; 428 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 429 int sl = v>>4; 430 int rr = v & 0x0f; 431 432 SLOT->SL = SL_TABLE[sl]; 433 if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL; 434 SLOT->RR = &OPL->DR_TABLE[rr<<2]; 435 SLOT->evsr = SLOT->RR[SLOT->ksr]; 436 if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr; 437 } 438 439 /* operator output calcrator */ 440 #define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env] 441 /* ---------- calcrate one of channel ---------- */ 442 INLINE void OPL_CALC_CH( OPL_CH *CH ) 443 { 444 UINT32 env_out; 445 OPL_SLOT *SLOT; 446 447 feedback2 = 0; 448 /* SLOT 1 */ 449 SLOT = &CH->SLOT[SLOT1]; 450 env_out=OPL_CALC_SLOT(SLOT); 451 if( env_out < EG_ENT-1 ) 452 { 453 /* PG */ 454 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 455 else SLOT->Cnt += SLOT->Incr; 456 /* connectoion */ 457 if(CH->FB) 458 { 459 int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB; 460 CH->op1_out[1] = CH->op1_out[0]; 461 *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 462 } 463 else 464 { 465 *CH->connect1 += OP_OUT(SLOT,env_out,0); 466 } 467 }else 468 { 469 CH->op1_out[1] = CH->op1_out[0]; 470 CH->op1_out[0] = 0; 471 } 472 /* SLOT 2 */ 473 SLOT = &CH->SLOT[SLOT2]; 474 env_out=OPL_CALC_SLOT(SLOT); 475 if( env_out < EG_ENT-1 ) 476 { 477 /* PG */ 478 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 479 else SLOT->Cnt += SLOT->Incr; 480 /* connectoion */ 481 outd[0] += OP_OUT(SLOT,env_out, feedback2); 482 } 483 } 484 485 /* ---------- calcrate rythm block ---------- */ 486 #define WHITE_NOISE_db 6.0 487 INLINE void OPL_CALC_RH( OPL_CH *CH ) 488 { 489 UINT32 env_tam,env_sd,env_top,env_hh; 490 int whitenoise = (rand()&1)*((int)(WHITE_NOISE_db/EG_STEP)); 491 INT32 tone8; 492 493 OPL_SLOT *SLOT; 494 int env_out; 495 496 /* BD : same as FM serial mode and output level is large */ 497 feedback2 = 0; 498 /* SLOT 1 */ 499 SLOT = &CH[6].SLOT[SLOT1]; 500 env_out=OPL_CALC_SLOT(SLOT); 501 if( env_out < EG_ENT-1 ) 502 { 503 /* PG */ 504 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 505 else SLOT->Cnt += SLOT->Incr; 506 /* connectoion */ 507 if(CH[6].FB) 508 { 509 int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB; 510 CH[6].op1_out[1] = CH[6].op1_out[0]; 511 feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 512 } 513 else 514 { 515 feedback2 = OP_OUT(SLOT,env_out,0); 516 } 517 }else 518 { 519 feedback2 = 0; 520 CH[6].op1_out[1] = CH[6].op1_out[0]; 521 CH[6].op1_out[0] = 0; 522 } 523 /* SLOT 2 */ 524 SLOT = &CH[6].SLOT[SLOT2]; 525 env_out=OPL_CALC_SLOT(SLOT); 526 if( env_out < EG_ENT-1 ) 527 { 528 /* PG */ 529 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 530 else SLOT->Cnt += SLOT->Incr; 531 /* connectoion */ 532 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2; 533 } 534 535 // SD (17) = mul14[fnum7] + white noise 536 // TAM (15) = mul15[fnum8] 537 // TOP (18) = fnum6(mul18[fnum8]+whitenoise) 538 // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise 539 env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise; 540 env_tam=OPL_CALC_SLOT(SLOT8_1); 541 env_top=OPL_CALC_SLOT(SLOT8_2); 542 env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise; 543 544 /* PG */ 545 if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE); 546 else SLOT7_1->Cnt += 2*SLOT7_1->Incr; 547 if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE); 548 else SLOT7_2->Cnt += (CH[7].fc*8); 549 if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE); 550 else SLOT8_1->Cnt += SLOT8_1->Incr; 551 if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE); 552 else SLOT8_2->Cnt += (CH[8].fc*48); 553 554 tone8 = OP_OUT(SLOT8_2,whitenoise,0 ); 555 556 /* SD */ 557 if( env_sd < EG_ENT-1 ) 558 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8; 559 /* TAM */ 560 if( env_tam < EG_ENT-1 ) 561 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2; 562 /* TOP-CY */ 563 if( env_top < EG_ENT-1 ) 564 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2; 565 /* HH */ 566 if( env_hh < EG_ENT-1 ) 567 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2; 568 } 569 570 /* ----------- initialize time tabls ----------- */ 571 static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE ) 572 { 573 int i; 574 double rate; 575 576 /* make attack rate & decay rate tables */ 577 for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; 578 for (i = 4;i <= 60;i++){ 579 rate = OPL->freqbase; /* frequency rate */ 580 if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ 581 rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */ 582 rate *= (double)(EG_ENT<<ENV_BITS); 583 OPL->AR_TABLE[i] = (INT32) (rate / ARRATE); 584 OPL->DR_TABLE[i] = (INT32) (rate / DRRATE); 585 } 586 for (i = 60;i < 76;i++) 587 { 588 OPL->AR_TABLE[i] = EG_AED-1; 589 OPL->DR_TABLE[i] = OPL->DR_TABLE[60]; 590 } 591 #if 0 592 for (i = 0;i < 64 ;i++){ /* make for overflow area */ 593 LOG(LOG_WAR,("rate %2d , ar %f ms , dr %f ms \n",i, 594 ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate), 595 ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) )); 596 } 597 #endif 598 } 599 600 /* ---------- generic table initialize ---------- */ 601 static int OPLOpenTable( void ) 602 { 603 int s,t; 604 double rate; 605 int i,j; 606 double pom; 607 608 /* allocate dynamic tables */ 609 if( (TL_TABLE = malloc(TL_MAX*2*sizeof(INT32))) == NULL) 610 return 0; 611 if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(INT32 *))) == NULL) 612 { 613 free(TL_TABLE); 614 return 0; 615 } 616 if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(INT32))) == NULL) 617 { 618 free(TL_TABLE); 619 free(SIN_TABLE); 620 return 0; 621 } 622 if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(INT32))) == NULL) 623 { 624 free(TL_TABLE); 625 free(SIN_TABLE); 626 free(AMS_TABLE); 627 return 0; 628 } 629 /* make total level table */ 630 for (t = 0;t < EG_ENT-1 ;t++){ 631 rate = ((1<<TL_BITS)-1)/mypow(10,EG_STEP*t/20); /* dB -> voltage */ 632 TL_TABLE[ t] = (int)rate; 633 TL_TABLE[TL_MAX+t] = -TL_TABLE[t]; 634 /* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/ 635 } 636 /* fill volume off area */ 637 for ( t = EG_ENT-1; t < TL_MAX ;t++){ 638 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0; 639 } 640 641 /* make sinwave table (total level offet) */ 642 /* degree 0 = degree 180 = off */ 643 SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1]; 644 for (s = 1;s <= SIN_ENT/4;s++){ 645 pom = sin(2*PI*s/SIN_ENT); /* sin */ 646 pom = 20*log10(1/pom); /* decibel */ 647 j = (int) (pom / EG_STEP); /* TL_TABLE steps */ 648 649 /* degree 0 - 90 , degree 180 - 90 : plus section */ 650 SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j]; 651 /* degree 180 - 270 , degree 360 - 270 : minus section */ 652 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j]; 653 /* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/ 654 } 655 for (s = 0;s < SIN_ENT;s++) 656 { 657 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; 658 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)]; 659 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s]; 660 } 661 662 /* envelope counter -> envelope output table */ 663 for (i=0; i<EG_ENT; i++) 664 { 665 /* ATTACK curve */ 666 pom = mypow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT; 667 /* if( pom >= EG_ENT ) pom = EG_ENT-1; */ 668 ENV_CURVE[i] = (int)pom; 669 /* DECAY ,RELEASE curve */ 670 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i; 671 } 672 /* off */ 673 ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1; 674 /* make LFO ams table */ 675 for (i=0; i<AMS_ENT; i++) 676 { 677 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ 678 AMS_TABLE[i] = (INT32) ((1.0/EG_STEP)*pom); /* 1dB */ 679 AMS_TABLE[AMS_ENT+i] = (INT32) ((4.8/EG_STEP)*pom); /* 4.8dB */ 680 } 681 /* make LFO vibrate table */ 682 for (i=0; i<VIB_ENT; i++) 683 { 684 /* 100cent = 1seminote = 6% ?? */ 685 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ 686 VIB_TABLE[i] = VIB_RATE + (INT32) (pom*0.07); /* +- 7cent */ 687 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (INT32) (pom*0.14); /* +-14cent */ 688 /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */ 689 } 690 return 1; 691 } 692 693 694 static void OPLCloseTable( void ) 695 { 696 free(TL_TABLE); 697 free(SIN_TABLE); 698 free(AMS_TABLE); 699 free(VIB_TABLE); 700 } 701 702 /* CSM Key Controll */ 703 INLINE void CSMKeyControll(OPL_CH *CH) 704 { 705 OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; 706 OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; 707 /* all key off */ 708 OPL_KEYOFF(slot1); 709 OPL_KEYOFF(slot2); 710 /* total level latch */ 711 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 712 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 713 /* key on */ 714 CH->op1_out[0] = CH->op1_out[1] = 0; 715 OPL_KEYON(slot1); 716 OPL_KEYON(slot2); 717 } 718 719 /* ---------- opl initialize ---------- */ 720 static void OPL_initalize(FM_OPL *OPL) 721 { 722 int fn; 723 724 /* frequency base */ 725 OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; 726 /* Timer base time */ 727 OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); 728 /* make time tables */ 729 init_timetables( OPL , OPL_ARRATE , OPL_DRRATE ); 730 /* make fnumber -> increment counter table */ 731 for( fn=0 ; fn < 1024 ; fn++ ) 732 { 733 OPL->FN_TABLE[fn] = (UINT32) (OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2); 734 } 735 /* LFO freq.table */ 736 OPL->amsIncr = (INT32) (OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0); 737 OPL->vibIncr = (INT32) (OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0); 738 } 739 740 /* ---------- write a OPL registers ---------- */ 741 static void OPLWriteReg(FM_OPL *OPL, int r, int v) 742 { 743 OPL_CH *CH; 744 int slot; 745 unsigned int block_fnum; 746 747 switch(r&0xe0) 748 { 749 case 0x00: /* 00-1f:controll */ 750 switch(r&0x1f) 751 { 752 case 0x01: 753 /* wave selector enable */ 754 if(OPL->type&OPL_TYPE_WAVESEL) 755 { 756 OPL->wavesel = v&0x20; 757 if(!OPL->wavesel) 758 { 759 /* preset compatible mode */ 760 int c; 761 for(c=0;c<OPL->max_ch;c++) 762 { 763 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0]; 764 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0]; 765 } 766 } 767 } 768 return; 769 case 0x02: /* Timer 1 */ 770 OPL->T[0] = (256-v)*4; 771 break; 772 case 0x03: /* Timer 2 */ 773 OPL->T[1] = (256-v)*16; 774 return; 775 case 0x04: /* IRQ clear / mask and Timer enable */ 776 if(v&0x80) 777 { /* IRQ flag clear */ 778 OPL_STATUS_RESET(OPL,0x7f); 779 } 780 else 781 { /* set IRQ mask ,timer enable*/ 782 UINT8 st1 = v&1; 783 UINT8 st2 = (v>>1)&1; 784 /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */ 785 OPL_STATUS_RESET(OPL,v&0x78); 786 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); 787 /* timer 2 */ 788 if(OPL->st[1] != st2) 789 { 790 double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; 791 OPL->st[1] = st2; 792 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval); 793 } 794 /* timer 1 */ 795 if(OPL->st[0] != st1) 796 { 797 double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; 798 OPL->st[0] = st1; 799 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval); 800 } 801 } 802 return; 803 #if BUILD_Y8950 804 case 0x06: /* Key Board OUT */ 805 if(OPL->type&OPL_TYPE_KEYBOARD) 806 { 807 if(OPL->keyboardhandler_w) 808 OPL->keyboardhandler_w(OPL->keyboard_param,v); 809 else 810 LOG(LOG_WAR,("OPL:write unmapped KEYBOARD port\n")); 811 } 812 return; 813 case 0x07: /* DELTA-T controll : START,REC,MEMDATA,REPT,SPOFF,x,x,RST */ 814 if(OPL->type&OPL_TYPE_ADPCM) 815 YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v); 816 return; 817 case 0x08: /* MODE,DELTA-T : CSM,NOTESEL,x,x,smpl,da/ad,64k,rom */ 818 OPL->mode = v; 819 v&=0x1f; /* for DELTA-T unit */ 820 case 0x09: /* START ADD */ 821 case 0x0a: 822 case 0x0b: /* STOP ADD */ 823 case 0x0c: 824 case 0x0d: /* PRESCALE */ 825 case 0x0e: 826 case 0x0f: /* ADPCM data */ 827 case 0x10: /* DELTA-N */ 828 case 0x11: /* DELTA-N */ 829 case 0x12: /* EG-CTRL */ 830 if(OPL->type&OPL_TYPE_ADPCM) 831 YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v); 832 return; 833 #if 0 834 case 0x15: /* DAC data */ 835 case 0x16: 836 case 0x17: /* SHIFT */ 837 return; 838 case 0x18: /* I/O CTRL (Direction) */ 839 if(OPL->type&OPL_TYPE_IO) 840 OPL->portDirection = v&0x0f; 841 return; 842 case 0x19: /* I/O DATA */ 843 if(OPL->type&OPL_TYPE_IO) 844 { 845 OPL->portLatch = v; 846 if(OPL->porthandler_w) 847 OPL->porthandler_w(OPL->port_param,v&OPL->portDirection); 848 } 849 return; 850 case 0x1a: /* PCM data */ 851 return; 852 #endif 853 #endif 854 } 855 break; 856 case 0x20: /* am,vib,ksr,eg type,mul */ 857 slot = slot_array[r&0x1f]; 858 if(slot == -1) return; 859 set_mul(OPL,slot,v); 860 return; 861 case 0x40: 862 slot = slot_array[r&0x1f]; 863 if(slot == -1) return; 864 set_ksl_tl(OPL,slot,v); 865 return; 866 case 0x60: 867 slot = slot_array[r&0x1f]; 868 if(slot == -1) return; 869 set_ar_dr(OPL,slot,v); 870 return; 871 case 0x80: 872 slot = slot_array[r&0x1f]; 873 if(slot == -1) return; 874 set_sl_rr(OPL,slot,v); 875 return; 876 case 0xa0: 877 switch(r) 878 { 879 case 0xbd: 880 /* amsep,vibdep,r,bd,sd,tom,tc,hh */ 881 { 882 UINT8 rkey = OPL->rythm^v; 883 OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0]; 884 OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0]; 885 OPL->rythm = v&0x3f; 886 if(OPL->rythm&0x20) 887 { 888 #if 0 889 usrintf_showmessage("OPL Rythm mode select"); 890 #endif 891 /* BD key on/off */ 892 if(rkey&0x10) 893 { 894 if(v&0x10) 895 { 896 OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; 897 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]); 898 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]); 899 } 900 else 901 { 902 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]); 903 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]); 904 } 905 } 906 /* SD key on/off */ 907 if(rkey&0x08) 908 { 909 if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); 910 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); 911 }/* TAM key on/off */ 912 if(rkey&0x04) 913 { 914 if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); 915 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); 916 } 917 /* TOP-CY key on/off */ 918 if(rkey&0x02) 919 { 920 if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); 921 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); 922 } 923 /* HH key on/off */ 924 if(rkey&0x01) 925 { 926 if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); 927 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); 928 } 929 } 930 } 931 return; 932 } 933 /* keyon,block,fnum */ 934 if( (r&0x0f) > 8) return; 935 CH = &OPL->P_CH[r&0x0f]; 936 if(!(r&0x10)) 937 { /* a0-a8 */ 938 block_fnum = (CH->block_fnum&0x1f00) | v; 939 } 940 else 941 { /* b0-b8 */ 942 int keyon = (v>>5)&1; 943 block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); 944 if(CH->keyon != keyon) 945 { 946 if( (CH->keyon=keyon) ) 947 { 948 CH->op1_out[0] = CH->op1_out[1] = 0; 949 OPL_KEYON(&CH->SLOT[SLOT1]); 950 OPL_KEYON(&CH->SLOT[SLOT2]); 951 } 952 else 953 { 954 OPL_KEYOFF(&CH->SLOT[SLOT1]); 955 OPL_KEYOFF(&CH->SLOT[SLOT2]); 956 } 957 } 958 } 959 /* update */ 960 if(CH->block_fnum != block_fnum) 961 { 962 int blockRv = 7-(block_fnum>>10); 963 int fnum = block_fnum&0x3ff; 964 CH->block_fnum = block_fnum; 965 966 CH->ksl_base = KSL_TABLE[block_fnum>>6]; 967 CH->fc = OPL->FN_TABLE[fnum]>>blockRv; 968 CH->kcode = CH->block_fnum>>9; 969 if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1; 970 CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); 971 CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); 972 } 973 return; 974 case 0xc0: 975 /* FB,C */ 976 if( (r&0x0f) > 8) return; 977 CH = &OPL->P_CH[r&0x0f]; 978 { 979 int feedback = (v>>1)&7; 980 CH->FB = feedback ? (8+1) - feedback : 0; 981 CH->CON = v&1; 982 set_algorythm(CH); 983 } 984 return; 985 case 0xe0: /* wave type */ 986 slot = slot_array[r&0x1f]; 987 if(slot == -1) return; 988 CH = &OPL->P_CH[slot/2]; 989 if(OPL->wavesel) 990 { 991 /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */ 992 CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT]; 993 } 994 return; 995 } 996 } 997 998 /* lock/unlock for common table */ 999 static int OPL_LockTable(void) 1000 { 1001 num_lock++; 1002 if(num_lock>1) return 0; 1003 /* first time */ 1004 cur_chip = NULL; 1005 /* allocate total level table (128kb space) */ 1006 if( !OPLOpenTable() ) 1007 { 1008 num_lock--; 1009 return -1; 1010 } 1011 return 0; 1012 } 1013 1014 static void OPL_UnLockTable(void) 1015 { 1016 if(num_lock) num_lock--; 1017 if(num_lock) return; 1018 /* last time */ 1019 cur_chip = NULL; 1020 OPLCloseTable(); 1021 } 1022 1023 #if (BUILD_YM3812 || BUILD_YM3526) 1024 /*******************************************************************************/ 1025 /* YM3812 local section */ 1026 /*******************************************************************************/ 1027 1028 /* ---------- update one of chip ----------- */ 1029 void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length) 1030 { 1031 int i; 1032 int data; 1033 FMSAMPLE *buf = buffer; 1034 UINT32 amsCnt = OPL->amsCnt; 1035 UINT32 vibCnt = OPL->vibCnt; 1036 UINT8 rythm = OPL->rythm&0x20; 1037 OPL_CH *CH,*R_CH; 1038 1039 if( (void *)OPL != cur_chip ){ 1040 cur_chip = (void *)OPL; 1041 /* channel pointers */ 1042 S_CH = OPL->P_CH; 1043 E_CH = &S_CH[9]; 1044 /* rythm slot */ 1045 SLOT7_1 = &S_CH[7].SLOT[SLOT1]; 1046 SLOT7_2 = &S_CH[7].SLOT[SLOT2]; 1047 SLOT8_1 = &S_CH[8].SLOT[SLOT1]; 1048 SLOT8_2 = &S_CH[8].SLOT[SLOT2]; 1049 /* LFO state */ 1050 amsIncr = OPL->amsIncr; 1051 vibIncr = OPL->vibIncr; 1052 ams_table = OPL->ams_table; 1053 vib_table = OPL->vib_table; 1054 } 1055 R_CH = rythm ? &S_CH[6] : E_CH; 1056 for( i=0; i < length ; i++ ) 1057 { 1058 /* channel A channel B channel C */ 1059 /* LFO */ 1060 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; 1061 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; 1062 outd[0] = 0; 1063 /* FM part */ 1064 for(CH=S_CH ; CH < R_CH ; CH++) 1065 OPL_CALC_CH(CH); 1066 /* Rythn part */ 1067 if(rythm) 1068 OPL_CALC_RH(S_CH); 1069 /* limit check */ 1070 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT ); 1071 /* store to sound buffer */ 1072 buf[i] = data >> OPL_OUTSB; 1073 } 1074 1075 OPL->amsCnt = amsCnt; 1076 OPL->vibCnt = vibCnt; 1077 } 1078 #endif /* (BUILD_YM3812 || BUILD_YM3526) */ 1079 1080 #if BUILD_Y8950 1081 1082 void Y8950UpdateOne(FM_OPL *OPL, INT16 *buffer, int length) 1083 { 1084 int i; 1085 int data; 1086 FMSAMPLE *buf = buffer; 1087 UINT32 amsCnt = OPL->amsCnt; 1088 UINT32 vibCnt = OPL->vibCnt; 1089 UINT8 rythm = OPL->rythm&0x20; 1090 OPL_CH *CH,*R_CH; 1091 YM_DELTAT *DELTAT = OPL->deltat; 1092 1093 /* setup DELTA-T unit */ 1094 YM_DELTAT_DECODE_PRESET(DELTAT); 1095 1096 if( (void *)OPL != cur_chip ){ 1097 cur_chip = (void *)OPL; 1098 /* channel pointers */ 1099 S_CH = OPL->P_CH; 1100 E_CH = &S_CH[9]; 1101 /* rythm slot */ 1102 SLOT7_1 = &S_CH[7].SLOT[SLOT1]; 1103 SLOT7_2 = &S_CH[7].SLOT[SLOT2]; 1104 SLOT8_1 = &S_CH[8].SLOT[SLOT1]; 1105 SLOT8_2 = &S_CH[8].SLOT[SLOT2]; 1106 /* LFO state */ 1107 amsIncr = OPL->amsIncr; 1108 vibIncr = OPL->vibIncr; 1109 ams_table = OPL->ams_table; 1110 vib_table = OPL->vib_table; 1111 } 1112 R_CH = rythm ? &S_CH[6] : E_CH; 1113 for( i=0; i < length ; i++ ) 1114 { 1115 /* channel A channel B channel C */ 1116 /* LFO */ 1117 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; 1118 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; 1119 outd[0] = 0; 1120 /* deltaT ADPCM */ 1121 if( DELTAT->flag ) 1122 YM_DELTAT_ADPCM_CALC(DELTAT); 1123 /* FM part */ 1124 for(CH=S_CH ; CH < R_CH ; CH++) 1125 OPL_CALC_CH(CH); 1126 /* Rythn part */ 1127 if(rythm) 1128 OPL_CALC_RH(S_CH); 1129 /* limit check */ 1130 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT ); 1131 /* store to sound buffer */ 1132 buf[i] = data >> OPL_OUTSB; 1133 } 1134 OPL->amsCnt = amsCnt; 1135 OPL->vibCnt = vibCnt; 1136 /* deltaT START flag */ 1137 if( !DELTAT->flag ) 1138 OPL->status &= 0xfe; 1139 } 1140 #endif 1141 1142 /* ---------- reset one of chip ---------- */ 1143 void OPLResetChip(FM_OPL *OPL) 1144 { 1145 int c,s; 1146 int i; 1147 1148 /* reset chip */ 1149 OPL->mode = 0; /* normal mode */ 1150 OPL_STATUS_RESET(OPL,0x7f); 1151 /* reset with register write */ 1152 OPLWriteReg(OPL,0x01,0); /* wabesel disable */ 1153 OPLWriteReg(OPL,0x02,0); /* Timer1 */ 1154 OPLWriteReg(OPL,0x03,0); /* Timer2 */ 1155 OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ 1156 for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); 1157 /* reset OPerator paramater */ 1158 for( c = 0 ; c < OPL->max_ch ; c++ ) 1159 { 1160 OPL_CH *CH = &OPL->P_CH[c]; 1161 /* OPL->P_CH[c].PAN = OPN_CENTER; */ 1162 for(s = 0 ; s < 2 ; s++ ) 1163 { 1164 /* wave table */ 1165 CH->SLOT[s].wavetable = &SIN_TABLE[0]; 1166 /* CH->SLOT[s].evm = ENV_MOD_RR; */ 1167 CH->SLOT[s].evc = EG_OFF; 1168 CH->SLOT[s].eve = EG_OFF+1; 1169 CH->SLOT[s].evs = 0; 1170 } 1171 } 1172 #if BUILD_Y8950 1173 if(OPL->type&OPL_TYPE_ADPCM) 1174 { 1175 YM_DELTAT *DELTAT = OPL->deltat; 1176 1177 DELTAT->freqbase = OPL->freqbase; 1178 DELTAT->output_pointer = outd; 1179 DELTAT->portshift = 5; 1180 DELTAT->output_range = DELTAT_MIXING_LEVEL<<TL_BITS; 1181 YM_DELTAT_ADPCM_Reset(DELTAT,0); 1182 } 1183 #endif 1184 } 1185 1186 /* ---------- Create one of vietual YM3812 ---------- */ 1187 /* 'rate' is sampling rate and 'bufsiz' is the size of the */ 1188 FM_OPL *OPLCreate(int type, int clock, int rate) 1189 { 1190 char *ptr; 1191 FM_OPL *OPL; 1192 int state_size; 1193 int max_ch = 9; /* normaly 9 channels */ 1194 1195 if( OPL_LockTable() ==-1) return NULL; 1196 /* allocate OPL state space */ 1197 state_size = sizeof(FM_OPL); 1198 state_size += sizeof(OPL_CH)*max_ch; 1199 #if BUILD_Y8950 1200 if(type&OPL_TYPE_ADPCM) state_size+= sizeof(YM_DELTAT); 1201 #endif 1202 /* allocate memory block */ 1203 ptr = malloc(state_size); 1204 if(ptr==NULL) return NULL; 1205 /* clear */ 1206 memset(ptr,0,state_size); 1207 OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL); 1208 OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch; 1209 #if BUILD_Y8950 1210 if(type&OPL_TYPE_ADPCM) OPL->deltat = (YM_DELTAT *)ptr; ptr+=sizeof(YM_DELTAT); 1211 #endif 1212 /* set channel state pointer */ 1213 OPL->type = type; 1214 OPL->clock = clock; 1215 OPL->rate = rate; 1216 OPL->max_ch = max_ch; 1217 /* init grobal tables */ 1218 OPL_initalize(OPL); 1219 /* reset chip */ 1220 OPLResetChip(OPL); 1221 return OPL; 1222 } 1223 1224 /* ---------- Destroy one of vietual YM3812 ---------- */ 1225 void OPLDestroy(FM_OPL *OPL) 1226 { 1227 OPL_UnLockTable(); 1228 free(OPL); 1229 } 1230 1231 /* ---------- Option handlers ---------- */ 1232 1233 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset) 1234 { 1235 OPL->TimerHandler = TimerHandler; 1236 OPL->TimerParam = channelOffset; 1237 } 1238 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param) 1239 { 1240 OPL->IRQHandler = IRQHandler; 1241 OPL->IRQParam = param; 1242 } 1243 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param) 1244 { 1245 OPL->UpdateHandler = UpdateHandler; 1246 OPL->UpdateParam = param; 1247 } 1248 #if BUILD_Y8950 1249 void OPLSetPortHandler(FM_OPL *OPL,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,int param) 1250 { 1251 OPL->porthandler_w = PortHandler_w; 1252 OPL->porthandler_r = PortHandler_r; 1253 OPL->port_param = param; 1254 } 1255 1256 void OPLSetKeyboardHandler(FM_OPL *OPL,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,int param) 1257 { 1258 OPL->keyboardhandler_w = KeyboardHandler_w; 1259 OPL->keyboardhandler_r = KeyboardHandler_r; 1260 OPL->keyboard_param = param; 1261 } 1262 #endif 1263 /* ---------- YM3812 I/O interface ---------- */ 1264 int OPLWrite(FM_OPL *OPL,int a,int v) 1265 { 1266 if( !(a&1) ) 1267 { /* address port */ 1268 OPL->address = v & 0xff; 1269 } 1270 else 1271 { /* data port */ 1272 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1273 OPLWriteReg(OPL,OPL->address,v); 1274 } 1275 return OPL->status>>7; 1276 } 1277 1278 unsigned char OPLRead(FM_OPL *OPL,int a) 1279 { 1280 if( !(a&1) ) 1281 { /* status port */ 1282 return OPL->status & (OPL->statusmask|0x80); 1283 } 1284 /* data port */ 1285 switch(OPL->address) 1286 { 1287 case 0x05: /* KeyBoard IN */ 1288 if(OPL->type&OPL_TYPE_KEYBOARD) 1289 { 1290 if(OPL->keyboardhandler_r) 1291 return OPL->keyboardhandler_r(OPL->keyboard_param); 1292 else 1293 LOG(LOG_WAR,("OPL:read unmapped KEYBOARD port\n")); 1294 } 1295 return 0; 1296 #if 0 1297 case 0x0f: /* ADPCM-DATA */ 1298 return 0; 1299 #endif 1300 case 0x19: /* I/O DATA */ 1301 if(OPL->type&OPL_TYPE_IO) 1302 { 1303 if(OPL->porthandler_r) 1304 return OPL->porthandler_r(OPL->port_param); 1305 else 1306 LOG(LOG_WAR,("OPL:read unmapped I/O port\n")); 1307 } 1308 return 0; 1309 case 0x1a: /* PCM-DATA */ 1310 return 0; 1311 } 1312 return 0; 1313 } 1314 1315 int OPLTimerOver(FM_OPL *OPL,int c) 1316 { 1317 if( c ) 1318 { /* Timer B */ 1319 OPL_STATUS_SET(OPL,0x20); 1320 } 1321 else 1322 { /* Timer A */ 1323 OPL_STATUS_SET(OPL,0x40); 1324 /* CSM mode key,TL controll */ 1325 if( OPL->mode & 0x80 ) 1326 { /* CSM mode total level latch and auto key on */ 1327 int ch; 1328 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1329 for(ch=0;ch<9;ch++) 1330 CSMKeyControll( &OPL->P_CH[ch] ); 1331 } 1332 } 1333 /* reload timer */ 1334 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase); 1335 return OPL->status>>7; 1336 } 1337 1338 1339