1 /* 2 ** 3 ** File: fmopl.c -- software implementation of FM sound generator 4 ** 5 ** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmurator development 6 ** 7 ** Version 0.37a 8 ** 9 */ 10 11 /* 12 preliminary : 13 Problem : 14 note: 15 */ 16 17 /* This version of fmopl.c is a fork of the MAME one, relicensed under the LGPL. 18 * 19 * This library is free software; you can redistribute it and/or 20 * modify it under the terms of the GNU Lesser General Public 21 * License as published by the Free Software Foundation; either 22 * version 2.1 of the License, or (at your option) any later version. 23 * 24 * This library is distributed in the hope that it will be useful, 25 * but WITHOUT ANY WARRANTY; without even the implied warranty of 26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 27 * Lesser General Public License for more details. 28 * 29 * You should have received a copy of the GNU Lesser General Public 30 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 31 */ 32 33 #define HAS_YM3812 1 34 35 #include "qemu/osdep.h" 36 #include <math.h> 37 //#include "driver.h" /* use M.A.M.E. */ 38 #include "fmopl.h" 39 40 #ifndef PI 41 #define PI 3.14159265358979323846 42 #endif 43 44 #ifndef ARRAY_SIZE 45 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 46 #endif 47 48 /* -------------------- for debug --------------------- */ 49 /* #define OPL_OUTPUT_LOG */ 50 #ifdef OPL_OUTPUT_LOG 51 static FILE *opl_dbg_fp = NULL; 52 static FM_OPL *opl_dbg_opl[16]; 53 static int opl_dbg_maxchip,opl_dbg_chip; 54 #endif 55 56 /* -------------------- preliminary define section --------------------- */ 57 /* attack/decay rate time rate */ 58 #define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */ 59 #define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */ 60 61 #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */ 62 63 #define FREQ_BITS 24 /* frequency turn */ 64 65 /* counter bits = 20 , octerve 7 */ 66 #define FREQ_RATE (1<<(FREQ_BITS-20)) 67 #define TL_BITS (FREQ_BITS+2) 68 69 /* final output shift , limit minimum and maximum */ 70 #define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */ 71 #define OPL_MAXOUT (0x7fff<<OPL_OUTSB) 72 #define OPL_MINOUT (-0x8000<<OPL_OUTSB) 73 74 /* -------------------- quality selection --------------------- */ 75 76 /* sinwave entries */ 77 /* used static memory = SIN_ENT * 4 (byte) */ 78 #define SIN_ENT 2048 79 80 /* output level entries (envelope,sinwave) */ 81 /* envelope counter lower bits */ 82 #define ENV_BITS 16 83 /* envelope output entries */ 84 #define EG_ENT 4096 85 /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */ 86 /* used static memory = EG_ENT*4 (byte) */ 87 88 #define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */ 89 #define EG_DED EG_OFF 90 #define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */ 91 #define EG_AED EG_DST 92 #define EG_AST 0 /* ATTACK START */ 93 94 #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */ 95 96 /* LFO table entries */ 97 #define VIB_ENT 512 98 #define VIB_SHIFT (32-9) 99 #define AMS_ENT 512 100 #define AMS_SHIFT (32-9) 101 102 #define VIB_RATE 256 103 104 /* -------------------- local defines , macros --------------------- */ 105 106 /* register number to channel number , slot offset */ 107 #define SLOT1 0 108 #define SLOT2 1 109 110 /* envelope phase */ 111 #define ENV_MOD_RR 0x00 112 #define ENV_MOD_DR 0x01 113 #define ENV_MOD_AR 0x02 114 115 /* -------------------- tables --------------------- */ 116 static const int slot_array[32]= 117 { 118 0, 2, 4, 1, 3, 5,-1,-1, 119 6, 8,10, 7, 9,11,-1,-1, 120 12,14,16,13,15,17,-1,-1, 121 -1,-1,-1,-1,-1,-1,-1,-1 122 }; 123 124 /* key scale level */ 125 /* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */ 126 #define DV (EG_STEP/2) 127 static const UINT32 KSL_TABLE[8*16]= 128 { 129 /* OCT 0 */ 130 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 131 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 132 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 133 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 134 /* OCT 1 */ 135 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 136 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 137 0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV, 138 1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV, 139 /* OCT 2 */ 140 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 141 0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV, 142 3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV, 143 4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV, 144 /* OCT 3 */ 145 0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV, 146 3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV, 147 6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV, 148 7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV, 149 /* OCT 4 */ 150 0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV, 151 6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV, 152 9.000/DV, 9.750/DV,10.125/DV,10.500/DV, 153 10.875/DV,11.250/DV,11.625/DV,12.000/DV, 154 /* OCT 5 */ 155 0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV, 156 9.000/DV,10.125/DV,10.875/DV,11.625/DV, 157 12.000/DV,12.750/DV,13.125/DV,13.500/DV, 158 13.875/DV,14.250/DV,14.625/DV,15.000/DV, 159 /* OCT 6 */ 160 0.000/DV, 6.000/DV, 9.000/DV,10.875/DV, 161 12.000/DV,13.125/DV,13.875/DV,14.625/DV, 162 15.000/DV,15.750/DV,16.125/DV,16.500/DV, 163 16.875/DV,17.250/DV,17.625/DV,18.000/DV, 164 /* OCT 7 */ 165 0.000/DV, 9.000/DV,12.000/DV,13.875/DV, 166 15.000/DV,16.125/DV,16.875/DV,17.625/DV, 167 18.000/DV,18.750/DV,19.125/DV,19.500/DV, 168 19.875/DV,20.250/DV,20.625/DV,21.000/DV 169 }; 170 #undef DV 171 172 /* sustain lebel table (3db per step) */ 173 /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/ 174 #define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST 175 static const INT32 SL_TABLE[16]={ 176 SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), 177 SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) 178 }; 179 #undef SC 180 181 #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */ 182 /* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */ 183 /* TL_TABLE[ 0 to TL_MAX ] : plus section */ 184 /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */ 185 static INT32 *TL_TABLE; 186 187 /* pointers to TL_TABLE with sinwave output offset */ 188 static INT32 **SIN_TABLE; 189 190 /* LFO table */ 191 static INT32 *AMS_TABLE; 192 static INT32 *VIB_TABLE; 193 194 /* envelope output curve table */ 195 /* attack + decay + OFF */ 196 static INT32 ENV_CURVE[2*EG_ENT+1]; 197 198 /* multiple table */ 199 #define ML 2 200 static const UINT32 MUL_TABLE[16]= { 201 /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */ 202 0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML, 203 8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML 204 }; 205 #undef ML 206 207 /* dummy attack / decay rate ( when rate == 0 ) */ 208 static INT32 RATE_0[16]= 209 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; 210 211 /* -------------------- static state --------------------- */ 212 213 /* lock level of common table */ 214 static int num_lock = 0; 215 216 /* work table */ 217 static void *cur_chip = NULL; /* current chip point */ 218 /* currenct chip state */ 219 /* static OPLSAMPLE *bufL,*bufR; */ 220 static OPL_CH *S_CH; 221 static OPL_CH *E_CH; 222 static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2; 223 224 static INT32 outd[1]; 225 static INT32 ams; 226 static INT32 vib; 227 static INT32 *ams_table; 228 static INT32 *vib_table; 229 static INT32 amsIncr; 230 static INT32 vibIncr; 231 static INT32 feedback2; /* connect for SLOT 2 */ 232 233 /* log output level */ 234 #define LOG_ERR 3 /* ERROR */ 235 #define LOG_WAR 2 /* WARNING */ 236 #define LOG_INF 1 /* INFORMATION */ 237 238 //#define LOG_LEVEL LOG_INF 239 #define LOG_LEVEL LOG_ERR 240 241 //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x 242 #define LOG(n,x) 243 244 /* --------------------- subroutines --------------------- */ 245 246 static inline int Limit( int val, int max, int min ) { 247 if ( val > max ) 248 val = max; 249 else if ( val < min ) 250 val = min; 251 252 return val; 253 } 254 255 /* status set and IRQ handling */ 256 static inline void OPL_STATUS_SET(FM_OPL *OPL,int flag) 257 { 258 /* set status flag */ 259 OPL->status |= flag; 260 if(!(OPL->status & 0x80)) 261 { 262 if(OPL->status & OPL->statusmask) 263 { /* IRQ on */ 264 OPL->status |= 0x80; 265 /* callback user interrupt handler (IRQ is OFF to ON) */ 266 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1); 267 } 268 } 269 } 270 271 /* status reset and IRQ handling */ 272 static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag) 273 { 274 /* reset status flag */ 275 OPL->status &=~flag; 276 if((OPL->status & 0x80)) 277 { 278 if (!(OPL->status & OPL->statusmask) ) 279 { 280 OPL->status &= 0x7f; 281 /* callback user interrupt handler (IRQ is ON to OFF) */ 282 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0); 283 } 284 } 285 } 286 287 /* IRQ mask set */ 288 static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) 289 { 290 OPL->statusmask = flag; 291 /* IRQ handling check */ 292 OPL_STATUS_SET(OPL,0); 293 OPL_STATUS_RESET(OPL,0); 294 } 295 296 /* ----- key on ----- */ 297 static inline void OPL_KEYON(OPL_SLOT *SLOT) 298 { 299 /* sin wave restart */ 300 SLOT->Cnt = 0; 301 /* set attack */ 302 SLOT->evm = ENV_MOD_AR; 303 SLOT->evs = SLOT->evsa; 304 SLOT->evc = EG_AST; 305 SLOT->eve = EG_AED; 306 } 307 /* ----- key off ----- */ 308 static inline void OPL_KEYOFF(OPL_SLOT *SLOT) 309 { 310 if( SLOT->evm > ENV_MOD_RR) 311 { 312 /* set envelope counter from envleope output */ 313 SLOT->evm = ENV_MOD_RR; 314 if( !(SLOT->evc&EG_DST) ) 315 //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST; 316 SLOT->evc = EG_DST; 317 SLOT->eve = EG_DED; 318 SLOT->evs = SLOT->evsr; 319 } 320 } 321 322 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */ 323 /* return : envelope output */ 324 static inline UINT32 OPL_CALC_SLOT( OPL_SLOT *SLOT ) 325 { 326 /* calcrate envelope generator */ 327 if( (SLOT->evc+=SLOT->evs) >= SLOT->eve ) 328 { 329 switch( SLOT->evm ){ 330 case ENV_MOD_AR: /* ATTACK -> DECAY1 */ 331 /* next DR */ 332 SLOT->evm = ENV_MOD_DR; 333 SLOT->evc = EG_DST; 334 SLOT->eve = SLOT->SL; 335 SLOT->evs = SLOT->evsd; 336 break; 337 case ENV_MOD_DR: /* DECAY -> SL or RR */ 338 SLOT->evc = SLOT->SL; 339 SLOT->eve = EG_DED; 340 if(SLOT->eg_typ) 341 { 342 SLOT->evs = 0; 343 } 344 else 345 { 346 SLOT->evm = ENV_MOD_RR; 347 SLOT->evs = SLOT->evsr; 348 } 349 break; 350 case ENV_MOD_RR: /* RR -> OFF */ 351 SLOT->evc = EG_OFF; 352 SLOT->eve = EG_OFF+1; 353 SLOT->evs = 0; 354 break; 355 } 356 } 357 /* calcrate envelope */ 358 return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0); 359 } 360 361 /* set algorithm connection */ 362 static void set_algorithm( OPL_CH *CH) 363 { 364 INT32 *carrier = &outd[0]; 365 CH->connect1 = CH->CON ? carrier : &feedback2; 366 CH->connect2 = carrier; 367 } 368 369 /* ---------- frequency counter for operater update ---------- */ 370 static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT) 371 { 372 int ksr; 373 374 /* frequency step counter */ 375 SLOT->Incr = CH->fc * SLOT->mul; 376 ksr = CH->kcode >> SLOT->KSR; 377 378 if( SLOT->ksr != ksr ) 379 { 380 SLOT->ksr = ksr; 381 /* attack , decay rate recalcration */ 382 SLOT->evsa = SLOT->AR[ksr]; 383 SLOT->evsd = SLOT->DR[ksr]; 384 SLOT->evsr = SLOT->RR[ksr]; 385 } 386 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 387 } 388 389 /* set multi,am,vib,EG-TYP,KSR,mul */ 390 static inline void set_mul(FM_OPL *OPL,int slot,int v) 391 { 392 OPL_CH *CH = &OPL->P_CH[slot/2]; 393 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 394 395 SLOT->mul = MUL_TABLE[v&0x0f]; 396 SLOT->KSR = (v&0x10) ? 0 : 2; 397 SLOT->eg_typ = (v&0x20)>>5; 398 SLOT->vib = (v&0x40); 399 SLOT->ams = (v&0x80); 400 CALC_FCSLOT(CH,SLOT); 401 } 402 403 /* set ksl & tl */ 404 static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v) 405 { 406 OPL_CH *CH = &OPL->P_CH[slot/2]; 407 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 408 int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */ 409 410 SLOT->ksl = ksl ? 3-ksl : 31; 411 SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */ 412 413 if( !(OPL->mode&0x80) ) 414 { /* not CSM latch total level */ 415 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 416 } 417 } 418 419 /* set attack rate & decay rate */ 420 static inline void set_ar_dr(FM_OPL *OPL,int slot,int v) 421 { 422 OPL_CH *CH = &OPL->P_CH[slot/2]; 423 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 424 int ar = v>>4; 425 int dr = v&0x0f; 426 427 SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0; 428 SLOT->evsa = SLOT->AR[SLOT->ksr]; 429 if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa; 430 431 SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0; 432 SLOT->evsd = SLOT->DR[SLOT->ksr]; 433 if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd; 434 } 435 436 /* set sustain level & release rate */ 437 static inline void set_sl_rr(FM_OPL *OPL,int slot,int v) 438 { 439 OPL_CH *CH = &OPL->P_CH[slot/2]; 440 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 441 int sl = v>>4; 442 int rr = v & 0x0f; 443 444 SLOT->SL = SL_TABLE[sl]; 445 if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL; 446 SLOT->RR = &OPL->DR_TABLE[rr<<2]; 447 SLOT->evsr = SLOT->RR[SLOT->ksr]; 448 if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr; 449 } 450 451 /* operator output calcrator */ 452 #define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env] 453 /* ---------- calcrate one of channel ---------- */ 454 static inline void OPL_CALC_CH( OPL_CH *CH ) 455 { 456 UINT32 env_out; 457 OPL_SLOT *SLOT; 458 459 feedback2 = 0; 460 /* SLOT 1 */ 461 SLOT = &CH->SLOT[SLOT1]; 462 env_out=OPL_CALC_SLOT(SLOT); 463 if( env_out < EG_ENT-1 ) 464 { 465 /* PG */ 466 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 467 else SLOT->Cnt += SLOT->Incr; 468 /* connectoion */ 469 if(CH->FB) 470 { 471 int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB; 472 CH->op1_out[1] = CH->op1_out[0]; 473 *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 474 } 475 else 476 { 477 *CH->connect1 += OP_OUT(SLOT,env_out,0); 478 } 479 }else 480 { 481 CH->op1_out[1] = CH->op1_out[0]; 482 CH->op1_out[0] = 0; 483 } 484 /* SLOT 2 */ 485 SLOT = &CH->SLOT[SLOT2]; 486 env_out=OPL_CALC_SLOT(SLOT); 487 if( env_out < EG_ENT-1 ) 488 { 489 /* PG */ 490 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 491 else SLOT->Cnt += SLOT->Incr; 492 /* connectoion */ 493 outd[0] += OP_OUT(SLOT,env_out, feedback2); 494 } 495 } 496 497 /* ---------- calcrate rhythm block ---------- */ 498 #define WHITE_NOISE_db 6.0 499 static inline void OPL_CALC_RH( OPL_CH *CH ) 500 { 501 UINT32 env_tam,env_sd,env_top,env_hh; 502 int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP); 503 INT32 tone8; 504 505 OPL_SLOT *SLOT; 506 int env_out; 507 508 /* BD : same as FM serial mode and output level is large */ 509 feedback2 = 0; 510 /* SLOT 1 */ 511 SLOT = &CH[6].SLOT[SLOT1]; 512 env_out=OPL_CALC_SLOT(SLOT); 513 if( env_out < EG_ENT-1 ) 514 { 515 /* PG */ 516 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 517 else SLOT->Cnt += SLOT->Incr; 518 /* connectoion */ 519 if(CH[6].FB) 520 { 521 int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB; 522 CH[6].op1_out[1] = CH[6].op1_out[0]; 523 feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 524 } 525 else 526 { 527 feedback2 = OP_OUT(SLOT,env_out,0); 528 } 529 }else 530 { 531 feedback2 = 0; 532 CH[6].op1_out[1] = CH[6].op1_out[0]; 533 CH[6].op1_out[0] = 0; 534 } 535 /* SLOT 2 */ 536 SLOT = &CH[6].SLOT[SLOT2]; 537 env_out=OPL_CALC_SLOT(SLOT); 538 if( env_out < EG_ENT-1 ) 539 { 540 /* PG */ 541 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 542 else SLOT->Cnt += SLOT->Incr; 543 /* connectoion */ 544 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2; 545 } 546 547 // SD (17) = mul14[fnum7] + white noise 548 // TAM (15) = mul15[fnum8] 549 // TOP (18) = fnum6(mul18[fnum8]+whitenoise) 550 // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise 551 env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise; 552 env_tam=OPL_CALC_SLOT(SLOT8_1); 553 env_top=OPL_CALC_SLOT(SLOT8_2); 554 env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise; 555 556 /* PG */ 557 if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE); 558 else SLOT7_1->Cnt += 2*SLOT7_1->Incr; 559 if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE); 560 else SLOT7_2->Cnt += (CH[7].fc*8); 561 if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE); 562 else SLOT8_1->Cnt += SLOT8_1->Incr; 563 if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE); 564 else SLOT8_2->Cnt += (CH[8].fc*48); 565 566 tone8 = OP_OUT(SLOT8_2,whitenoise,0 ); 567 568 /* SD */ 569 if( env_sd < EG_ENT-1 ) 570 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8; 571 /* TAM */ 572 if( env_tam < EG_ENT-1 ) 573 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2; 574 /* TOP-CY */ 575 if( env_top < EG_ENT-1 ) 576 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2; 577 /* HH */ 578 if( env_hh < EG_ENT-1 ) 579 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2; 580 } 581 582 /* ----------- initialize time tabls ----------- */ 583 static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE ) 584 { 585 int i; 586 double rate; 587 588 /* make attack rate & decay rate tables */ 589 for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; 590 for (i = 4;i <= 60;i++){ 591 rate = OPL->freqbase; /* frequency rate */ 592 if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ 593 rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */ 594 rate *= (double)(EG_ENT<<ENV_BITS); 595 OPL->AR_TABLE[i] = rate / ARRATE; 596 OPL->DR_TABLE[i] = rate / DRRATE; 597 } 598 for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++) 599 { 600 OPL->AR_TABLE[i] = EG_AED-1; 601 OPL->DR_TABLE[i] = OPL->DR_TABLE[60]; 602 } 603 #if 0 604 for (i = 0;i < 64 ;i++){ /* make for overflow area */ 605 LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i, 606 ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate), 607 ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) )); 608 } 609 #endif 610 } 611 612 /* ---------- generic table initialize ---------- */ 613 static int OPLOpenTable( void ) 614 { 615 int s,t; 616 double rate; 617 int i,j; 618 double pom; 619 620 /* allocate dynamic tables */ 621 if( (TL_TABLE = malloc(TL_MAX*2*sizeof(INT32))) == NULL) 622 return 0; 623 if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(INT32 *))) == NULL) 624 { 625 free(TL_TABLE); 626 return 0; 627 } 628 if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(INT32))) == NULL) 629 { 630 free(TL_TABLE); 631 free(SIN_TABLE); 632 return 0; 633 } 634 if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(INT32))) == NULL) 635 { 636 free(TL_TABLE); 637 free(SIN_TABLE); 638 free(AMS_TABLE); 639 return 0; 640 } 641 /* make total level table */ 642 for (t = 0;t < EG_ENT-1 ;t++){ 643 rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */ 644 TL_TABLE[ t] = (int)rate; 645 TL_TABLE[TL_MAX+t] = -TL_TABLE[t]; 646 /* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/ 647 } 648 /* fill volume off area */ 649 for ( t = EG_ENT-1; t < TL_MAX ;t++){ 650 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0; 651 } 652 653 /* make sinwave table (total level offet) */ 654 /* degree 0 = degree 180 = off */ 655 SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1]; 656 for (s = 1;s <= SIN_ENT/4;s++){ 657 pom = sin(2*PI*s/SIN_ENT); /* sin */ 658 pom = 20*log10(1/pom); /* decibel */ 659 j = pom / EG_STEP; /* TL_TABLE steps */ 660 661 /* degree 0 - 90 , degree 180 - 90 : plus section */ 662 SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j]; 663 /* degree 180 - 270 , degree 360 - 270 : minus section */ 664 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j]; 665 /* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/ 666 } 667 for (s = 0;s < SIN_ENT;s++) 668 { 669 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; 670 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)]; 671 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s]; 672 } 673 674 /* envelope counter -> envelope output table */ 675 for (i=0; i<EG_ENT; i++) 676 { 677 /* ATTACK curve */ 678 pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT; 679 /* if( pom >= EG_ENT ) pom = EG_ENT-1; */ 680 ENV_CURVE[i] = (int)pom; 681 /* DECAY ,RELEASE curve */ 682 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i; 683 } 684 /* off */ 685 ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1; 686 /* make LFO ams table */ 687 for (i=0; i<AMS_ENT; i++) 688 { 689 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ 690 AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */ 691 AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */ 692 } 693 /* make LFO vibrate table */ 694 for (i=0; i<VIB_ENT; i++) 695 { 696 /* 100cent = 1seminote = 6% ?? */ 697 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ 698 VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */ 699 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */ 700 /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */ 701 } 702 return 1; 703 } 704 705 706 static void OPLCloseTable( void ) 707 { 708 free(TL_TABLE); 709 free(SIN_TABLE); 710 free(AMS_TABLE); 711 free(VIB_TABLE); 712 } 713 714 /* CSM Key Control */ 715 static inline void CSMKeyControll(OPL_CH *CH) 716 { 717 OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; 718 OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; 719 /* all key off */ 720 OPL_KEYOFF(slot1); 721 OPL_KEYOFF(slot2); 722 /* total level latch */ 723 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 724 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 725 /* key on */ 726 CH->op1_out[0] = CH->op1_out[1] = 0; 727 OPL_KEYON(slot1); 728 OPL_KEYON(slot2); 729 } 730 731 /* ---------- opl initialize ---------- */ 732 static void OPL_initialize(FM_OPL *OPL) 733 { 734 int fn; 735 736 /* frequency base */ 737 OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; 738 /* Timer base time */ 739 OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); 740 /* make time tables */ 741 init_timetables( OPL , OPL_ARRATE , OPL_DRRATE ); 742 /* make fnumber -> increment counter table */ 743 for( fn=0 ; fn < 1024 ; fn++ ) 744 { 745 OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2; 746 } 747 /* LFO freq.table */ 748 OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0; 749 OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0; 750 } 751 752 /* ---------- write a OPL registers ---------- */ 753 static void OPLWriteReg(FM_OPL *OPL, int r, int v) 754 { 755 OPL_CH *CH; 756 int slot; 757 int block_fnum; 758 759 switch(r&0xe0) 760 { 761 case 0x00: /* 00-1f:control */ 762 switch(r&0x1f) 763 { 764 case 0x01: 765 /* wave selector enable */ 766 if(OPL->type&OPL_TYPE_WAVESEL) 767 { 768 OPL->wavesel = v&0x20; 769 if(!OPL->wavesel) 770 { 771 /* preset compatible mode */ 772 int c; 773 for(c=0;c<OPL->max_ch;c++) 774 { 775 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0]; 776 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0]; 777 } 778 } 779 } 780 return; 781 case 0x02: /* Timer 1 */ 782 OPL->T[0] = (256-v)*4; 783 break; 784 case 0x03: /* Timer 2 */ 785 OPL->T[1] = (256-v)*16; 786 return; 787 case 0x04: /* IRQ clear / mask and Timer enable */ 788 if(v&0x80) 789 { /* IRQ flag clear */ 790 OPL_STATUS_RESET(OPL,0x7f); 791 } 792 else 793 { /* set IRQ mask ,timer enable*/ 794 UINT8 st1 = v&1; 795 UINT8 st2 = (v>>1)&1; 796 /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */ 797 OPL_STATUS_RESET(OPL,v&0x78); 798 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); 799 /* timer 2 */ 800 if(OPL->st[1] != st2) 801 { 802 double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; 803 OPL->st[1] = st2; 804 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval); 805 } 806 /* timer 1 */ 807 if(OPL->st[0] != st1) 808 { 809 double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; 810 OPL->st[0] = st1; 811 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval); 812 } 813 } 814 return; 815 } 816 break; 817 case 0x20: /* am,vib,ksr,eg type,mul */ 818 slot = slot_array[r&0x1f]; 819 if(slot == -1) return; 820 set_mul(OPL,slot,v); 821 return; 822 case 0x40: 823 slot = slot_array[r&0x1f]; 824 if(slot == -1) return; 825 set_ksl_tl(OPL,slot,v); 826 return; 827 case 0x60: 828 slot = slot_array[r&0x1f]; 829 if(slot == -1) return; 830 set_ar_dr(OPL,slot,v); 831 return; 832 case 0x80: 833 slot = slot_array[r&0x1f]; 834 if(slot == -1) return; 835 set_sl_rr(OPL,slot,v); 836 return; 837 case 0xa0: 838 switch(r) 839 { 840 case 0xbd: 841 /* amsep,vibdep,r,bd,sd,tom,tc,hh */ 842 { 843 UINT8 rkey = OPL->rhythm^v; 844 OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0]; 845 OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0]; 846 OPL->rhythm = v&0x3f; 847 if(OPL->rhythm&0x20) 848 { 849 #if 0 850 usrintf_showmessage("OPL Rhythm mode select"); 851 #endif 852 /* BD key on/off */ 853 if(rkey&0x10) 854 { 855 if(v&0x10) 856 { 857 OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; 858 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]); 859 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]); 860 } 861 else 862 { 863 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]); 864 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]); 865 } 866 } 867 /* SD key on/off */ 868 if(rkey&0x08) 869 { 870 if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); 871 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); 872 }/* TAM key on/off */ 873 if(rkey&0x04) 874 { 875 if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); 876 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); 877 } 878 /* TOP-CY key on/off */ 879 if(rkey&0x02) 880 { 881 if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); 882 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); 883 } 884 /* HH key on/off */ 885 if(rkey&0x01) 886 { 887 if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); 888 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); 889 } 890 } 891 } 892 return; 893 } 894 /* keyon,block,fnum */ 895 if( (r&0x0f) > 8) return; 896 CH = &OPL->P_CH[r&0x0f]; 897 if(!(r&0x10)) 898 { /* a0-a8 */ 899 block_fnum = (CH->block_fnum&0x1f00) | v; 900 } 901 else 902 { /* b0-b8 */ 903 int keyon = (v>>5)&1; 904 block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); 905 if(CH->keyon != keyon) 906 { 907 if( (CH->keyon=keyon) ) 908 { 909 CH->op1_out[0] = CH->op1_out[1] = 0; 910 OPL_KEYON(&CH->SLOT[SLOT1]); 911 OPL_KEYON(&CH->SLOT[SLOT2]); 912 } 913 else 914 { 915 OPL_KEYOFF(&CH->SLOT[SLOT1]); 916 OPL_KEYOFF(&CH->SLOT[SLOT2]); 917 } 918 } 919 } 920 /* update */ 921 if(CH->block_fnum != block_fnum) 922 { 923 int blockRv = 7-(block_fnum>>10); 924 int fnum = block_fnum&0x3ff; 925 CH->block_fnum = block_fnum; 926 927 CH->ksl_base = KSL_TABLE[block_fnum>>6]; 928 CH->fc = OPL->FN_TABLE[fnum]>>blockRv; 929 CH->kcode = CH->block_fnum>>9; 930 if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1; 931 CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); 932 CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); 933 } 934 return; 935 case 0xc0: 936 /* FB,C */ 937 if( (r&0x0f) > 8) return; 938 CH = &OPL->P_CH[r&0x0f]; 939 { 940 int feedback = (v>>1)&7; 941 CH->FB = feedback ? (8+1) - feedback : 0; 942 CH->CON = v&1; 943 set_algorithm(CH); 944 } 945 return; 946 case 0xe0: /* wave type */ 947 slot = slot_array[r&0x1f]; 948 if(slot == -1) return; 949 CH = &OPL->P_CH[slot/2]; 950 if(OPL->wavesel) 951 { 952 /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */ 953 CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT]; 954 } 955 return; 956 } 957 } 958 959 /* lock/unlock for common table */ 960 static int OPL_LockTable(void) 961 { 962 num_lock++; 963 if(num_lock>1) return 0; 964 /* first time */ 965 cur_chip = NULL; 966 /* allocate total level table (128kb space) */ 967 if( !OPLOpenTable() ) 968 { 969 num_lock--; 970 return -1; 971 } 972 return 0; 973 } 974 975 static void OPL_UnLockTable(void) 976 { 977 if(num_lock) num_lock--; 978 if(num_lock) return; 979 /* last time */ 980 cur_chip = NULL; 981 OPLCloseTable(); 982 } 983 984 #if BUILD_YM3812 985 /*******************************************************************************/ 986 /* YM3812 local section */ 987 /*******************************************************************************/ 988 989 /* ---------- update one of chip ----------- */ 990 void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length) 991 { 992 int i; 993 int data; 994 OPLSAMPLE *buf = buffer; 995 UINT32 amsCnt = OPL->amsCnt; 996 UINT32 vibCnt = OPL->vibCnt; 997 UINT8 rhythm = OPL->rhythm&0x20; 998 OPL_CH *CH,*R_CH; 999 1000 if( (void *)OPL != cur_chip ){ 1001 cur_chip = (void *)OPL; 1002 /* channel pointers */ 1003 S_CH = OPL->P_CH; 1004 E_CH = &S_CH[9]; 1005 /* rhythm slot */ 1006 SLOT7_1 = &S_CH[7].SLOT[SLOT1]; 1007 SLOT7_2 = &S_CH[7].SLOT[SLOT2]; 1008 SLOT8_1 = &S_CH[8].SLOT[SLOT1]; 1009 SLOT8_2 = &S_CH[8].SLOT[SLOT2]; 1010 /* LFO state */ 1011 amsIncr = OPL->amsIncr; 1012 vibIncr = OPL->vibIncr; 1013 ams_table = OPL->ams_table; 1014 vib_table = OPL->vib_table; 1015 } 1016 R_CH = rhythm ? &S_CH[6] : E_CH; 1017 for( i=0; i < length ; i++ ) 1018 { 1019 /* channel A channel B channel C */ 1020 /* LFO */ 1021 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; 1022 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; 1023 outd[0] = 0; 1024 /* FM part */ 1025 for(CH=S_CH ; CH < R_CH ; CH++) 1026 OPL_CALC_CH(CH); 1027 /* Rythn part */ 1028 if(rhythm) 1029 OPL_CALC_RH(S_CH); 1030 /* limit check */ 1031 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT ); 1032 /* store to sound buffer */ 1033 buf[i] = data >> OPL_OUTSB; 1034 } 1035 1036 OPL->amsCnt = amsCnt; 1037 OPL->vibCnt = vibCnt; 1038 #ifdef OPL_OUTPUT_LOG 1039 if(opl_dbg_fp) 1040 { 1041 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1042 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1043 fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256); 1044 } 1045 #endif 1046 } 1047 #endif /* BUILD_YM3812 */ 1048 1049 /* ---------- reset one of chip ---------- */ 1050 void OPLResetChip(FM_OPL *OPL) 1051 { 1052 int c,s; 1053 int i; 1054 1055 /* reset chip */ 1056 OPL->mode = 0; /* normal mode */ 1057 OPL_STATUS_RESET(OPL,0x7f); 1058 /* reset with register write */ 1059 OPLWriteReg(OPL,0x01,0); /* wabesel disable */ 1060 OPLWriteReg(OPL,0x02,0); /* Timer1 */ 1061 OPLWriteReg(OPL,0x03,0); /* Timer2 */ 1062 OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ 1063 for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); 1064 /* reset operator parameter */ 1065 for( c = 0 ; c < OPL->max_ch ; c++ ) 1066 { 1067 OPL_CH *CH = &OPL->P_CH[c]; 1068 /* OPL->P_CH[c].PAN = OPN_CENTER; */ 1069 for(s = 0 ; s < 2 ; s++ ) 1070 { 1071 /* wave table */ 1072 CH->SLOT[s].wavetable = &SIN_TABLE[0]; 1073 /* CH->SLOT[s].evm = ENV_MOD_RR; */ 1074 CH->SLOT[s].evc = EG_OFF; 1075 CH->SLOT[s].eve = EG_OFF+1; 1076 CH->SLOT[s].evs = 0; 1077 } 1078 } 1079 } 1080 1081 /* ---------- Create one of vietual YM3812 ---------- */ 1082 /* 'rate' is sampling rate and 'bufsiz' is the size of the */ 1083 FM_OPL *OPLCreate(int type, int clock, int rate) 1084 { 1085 char *ptr; 1086 FM_OPL *OPL; 1087 int state_size; 1088 int max_ch = 9; /* normaly 9 channels */ 1089 1090 if( OPL_LockTable() ==-1) return NULL; 1091 /* allocate OPL state space */ 1092 state_size = sizeof(FM_OPL); 1093 state_size += sizeof(OPL_CH)*max_ch; 1094 /* allocate memory block */ 1095 ptr = malloc(state_size); 1096 if(ptr==NULL) return NULL; 1097 /* clear */ 1098 memset(ptr,0,state_size); 1099 OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL); 1100 OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch; 1101 /* set channel state pointer */ 1102 OPL->type = type; 1103 OPL->clock = clock; 1104 OPL->rate = rate; 1105 OPL->max_ch = max_ch; 1106 /* init grobal tables */ 1107 OPL_initialize(OPL); 1108 /* reset chip */ 1109 OPLResetChip(OPL); 1110 #ifdef OPL_OUTPUT_LOG 1111 if(!opl_dbg_fp) 1112 { 1113 opl_dbg_fp = fopen("opllog.opl","wb"); 1114 opl_dbg_maxchip = 0; 1115 } 1116 if(opl_dbg_fp) 1117 { 1118 opl_dbg_opl[opl_dbg_maxchip] = OPL; 1119 fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip, 1120 type, 1121 clock&0xff, 1122 (clock/0x100)&0xff, 1123 (clock/0x10000)&0xff, 1124 (clock/0x1000000)&0xff); 1125 opl_dbg_maxchip++; 1126 } 1127 #endif 1128 return OPL; 1129 } 1130 1131 /* ---------- Destroy one of vietual YM3812 ---------- */ 1132 void OPLDestroy(FM_OPL *OPL) 1133 { 1134 #ifdef OPL_OUTPUT_LOG 1135 if(opl_dbg_fp) 1136 { 1137 fclose(opl_dbg_fp); 1138 opl_dbg_fp = NULL; 1139 } 1140 #endif 1141 OPL_UnLockTable(); 1142 free(OPL); 1143 } 1144 1145 /* ---------- Option handlers ---------- */ 1146 1147 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset) 1148 { 1149 OPL->TimerHandler = TimerHandler; 1150 OPL->TimerParam = channelOffset; 1151 } 1152 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param) 1153 { 1154 OPL->IRQHandler = IRQHandler; 1155 OPL->IRQParam = param; 1156 } 1157 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param) 1158 { 1159 OPL->UpdateHandler = UpdateHandler; 1160 OPL->UpdateParam = param; 1161 } 1162 /* ---------- YM3812 I/O interface ---------- */ 1163 int OPLWrite(FM_OPL *OPL,int a,int v) 1164 { 1165 if( !(a&1) ) 1166 { /* address port */ 1167 OPL->address = v & 0xff; 1168 } 1169 else 1170 { /* data port */ 1171 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1172 #ifdef OPL_OUTPUT_LOG 1173 if(opl_dbg_fp) 1174 { 1175 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1176 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1177 fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v); 1178 } 1179 #endif 1180 OPLWriteReg(OPL,OPL->address,v); 1181 } 1182 return OPL->status>>7; 1183 } 1184 1185 unsigned char OPLRead(FM_OPL *OPL,int a) 1186 { 1187 if( !(a&1) ) 1188 { /* status port */ 1189 return OPL->status & (OPL->statusmask|0x80); 1190 } 1191 /* data port */ 1192 switch(OPL->address) 1193 { 1194 case 0x05: /* KeyBoard IN */ 1195 if(OPL->type&OPL_TYPE_KEYBOARD) 1196 { 1197 if(OPL->keyboardhandler_r) 1198 return OPL->keyboardhandler_r(OPL->keyboard_param); 1199 else { 1200 LOG(LOG_WAR,("OPL:read unmapped KEYBOARD port\n")); 1201 } 1202 } 1203 return 0; 1204 #if 0 1205 case 0x0f: /* ADPCM-DATA */ 1206 return 0; 1207 #endif 1208 case 0x19: /* I/O DATA */ 1209 if(OPL->type&OPL_TYPE_IO) 1210 { 1211 if(OPL->porthandler_r) 1212 return OPL->porthandler_r(OPL->port_param); 1213 else { 1214 LOG(LOG_WAR,("OPL:read unmapped I/O port\n")); 1215 } 1216 } 1217 return 0; 1218 case 0x1a: /* PCM-DATA */ 1219 return 0; 1220 } 1221 return 0; 1222 } 1223 1224 int OPLTimerOver(FM_OPL *OPL,int c) 1225 { 1226 if( c ) 1227 { /* Timer B */ 1228 OPL_STATUS_SET(OPL,0x20); 1229 } 1230 else 1231 { /* Timer A */ 1232 OPL_STATUS_SET(OPL,0x40); 1233 /* CSM mode key,TL control */ 1234 if( OPL->mode & 0x80 ) 1235 { /* CSM mode total level latch and auto key on */ 1236 int ch; 1237 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1238 for(ch=0;ch<9;ch++) 1239 CSMKeyControll( &OPL->P_CH[ch] ); 1240 } 1241 } 1242 /* reload timer */ 1243 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase); 1244 return OPL->status>>7; 1245 } 1246