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 #include "qemu/osdep.h" 34 #include <math.h> 35 //#include "driver.h" /* use M.A.M.E. */ 36 #include "fmopl.h" 37 38 #ifndef PI 39 #define PI 3.14159265358979323846 40 #endif 41 42 #ifndef ARRAY_SIZE 43 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 44 #endif 45 46 /* -------------------- for debug --------------------- */ 47 /* #define OPL_OUTPUT_LOG */ 48 #ifdef OPL_OUTPUT_LOG 49 static FILE *opl_dbg_fp = NULL; 50 static FM_OPL *opl_dbg_opl[16]; 51 static int opl_dbg_maxchip,opl_dbg_chip; 52 #endif 53 54 /* -------------------- preliminary define section --------------------- */ 55 /* attack/decay rate time rate */ 56 #define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */ 57 #define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */ 58 59 #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */ 60 61 #define FREQ_BITS 24 /* frequency turn */ 62 63 /* counter bits = 20 , octerve 7 */ 64 #define FREQ_RATE (1<<(FREQ_BITS-20)) 65 #define TL_BITS (FREQ_BITS+2) 66 67 /* final output shift , limit minimum and maximum */ 68 #define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */ 69 #define OPL_MAXOUT (0x7fff<<OPL_OUTSB) 70 #define OPL_MINOUT (-0x8000<<OPL_OUTSB) 71 72 /* -------------------- quality selection --------------------- */ 73 74 /* sinwave entries */ 75 /* used static memory = SIN_ENT * 4 (byte) */ 76 #define SIN_ENT 2048 77 78 /* output level entries (envelope,sinwave) */ 79 /* envelope counter lower bits */ 80 #define ENV_BITS 16 81 /* envelope output entries */ 82 #define EG_ENT 4096 83 /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */ 84 /* used static memory = EG_ENT*4 (byte) */ 85 86 #define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */ 87 #define EG_DED EG_OFF 88 #define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */ 89 #define EG_AED EG_DST 90 #define EG_AST 0 /* ATTACK START */ 91 92 #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */ 93 94 /* LFO table entries */ 95 #define VIB_ENT 512 96 #define VIB_SHIFT (32-9) 97 #define AMS_ENT 512 98 #define AMS_SHIFT (32-9) 99 100 #define VIB_RATE 256 101 102 /* -------------------- local defines , macros --------------------- */ 103 104 /* register number to channel number , slot offset */ 105 #define SLOT1 0 106 #define SLOT2 1 107 108 /* envelope phase */ 109 #define ENV_MOD_RR 0x00 110 #define ENV_MOD_DR 0x01 111 #define ENV_MOD_AR 0x02 112 113 /* -------------------- tables --------------------- */ 114 static const int slot_array[32]= 115 { 116 0, 2, 4, 1, 3, 5,-1,-1, 117 6, 8,10, 7, 9,11,-1,-1, 118 12,14,16,13,15,17,-1,-1, 119 -1,-1,-1,-1,-1,-1,-1,-1 120 }; 121 122 /* key scale level */ 123 /* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */ 124 #define DV (EG_STEP/2) 125 static const uint32_t KSL_TABLE[8*16]= 126 { 127 /* OCT 0 */ 128 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 129 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 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 /* OCT 1 */ 133 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 134 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 135 0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV, 136 1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV, 137 /* OCT 2 */ 138 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, 139 0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV, 140 3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV, 141 4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV, 142 /* OCT 3 */ 143 0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV, 144 3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV, 145 6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV, 146 7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV, 147 /* OCT 4 */ 148 0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV, 149 6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV, 150 9.000/DV, 9.750/DV,10.125/DV,10.500/DV, 151 10.875/DV,11.250/DV,11.625/DV,12.000/DV, 152 /* OCT 5 */ 153 0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV, 154 9.000/DV,10.125/DV,10.875/DV,11.625/DV, 155 12.000/DV,12.750/DV,13.125/DV,13.500/DV, 156 13.875/DV,14.250/DV,14.625/DV,15.000/DV, 157 /* OCT 6 */ 158 0.000/DV, 6.000/DV, 9.000/DV,10.875/DV, 159 12.000/DV,13.125/DV,13.875/DV,14.625/DV, 160 15.000/DV,15.750/DV,16.125/DV,16.500/DV, 161 16.875/DV,17.250/DV,17.625/DV,18.000/DV, 162 /* OCT 7 */ 163 0.000/DV, 9.000/DV,12.000/DV,13.875/DV, 164 15.000/DV,16.125/DV,16.875/DV,17.625/DV, 165 18.000/DV,18.750/DV,19.125/DV,19.500/DV, 166 19.875/DV,20.250/DV,20.625/DV,21.000/DV 167 }; 168 #undef DV 169 170 /* sustain lebel table (3db per step) */ 171 /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/ 172 #define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST 173 static const int32_t SL_TABLE[16]={ 174 SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), 175 SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) 176 }; 177 #undef SC 178 179 #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */ 180 /* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */ 181 /* TL_TABLE[ 0 to TL_MAX ] : plus section */ 182 /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */ 183 static int32_t *TL_TABLE; 184 185 /* pointers to TL_TABLE with sinwave output offset */ 186 static int32_t **SIN_TABLE; 187 188 /* LFO table */ 189 static int32_t *AMS_TABLE; 190 static int32_t *VIB_TABLE; 191 192 /* envelope output curve table */ 193 /* attack + decay + OFF */ 194 static int32_t ENV_CURVE[2*EG_ENT+1]; 195 196 /* multiple table */ 197 #define ML 2 198 static const uint32_t MUL_TABLE[16]= { 199 /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */ 200 0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML, 201 8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML 202 }; 203 #undef ML 204 205 /* dummy attack / decay rate ( when rate == 0 ) */ 206 static int32_t RATE_0[16]= 207 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; 208 209 /* -------------------- static state --------------------- */ 210 211 /* lock level of common table */ 212 static int num_lock = 0; 213 214 /* work table */ 215 static void *cur_chip = NULL; /* current chip point */ 216 /* currenct chip state */ 217 /* static OPLSAMPLE *bufL,*bufR; */ 218 static OPL_CH *S_CH; 219 static OPL_CH *E_CH; 220 static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2; 221 222 static int32_t outd[1]; 223 static int32_t ams; 224 static int32_t vib; 225 static int32_t *ams_table; 226 static int32_t *vib_table; 227 static int32_t amsIncr; 228 static int32_t vibIncr; 229 static int32_t feedback2; /* connect for SLOT 2 */ 230 231 /* log output level */ 232 #define LOG_ERR 3 /* ERROR */ 233 #define LOG_WAR 2 /* WARNING */ 234 #define LOG_INF 1 /* INFORMATION */ 235 236 //#define LOG_LEVEL LOG_INF 237 #define LOG_LEVEL LOG_ERR 238 239 //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x 240 #define LOG(n,x) 241 242 /* --------------------- subroutines --------------------- */ 243 244 static inline int Limit( int val, int max, int min ) { 245 if ( val > max ) 246 val = max; 247 else if ( val < min ) 248 val = min; 249 250 return val; 251 } 252 253 /* status set and IRQ handling */ 254 static inline void OPL_STATUS_SET(FM_OPL *OPL,int flag) 255 { 256 /* set status flag */ 257 OPL->status |= flag; 258 if(!(OPL->status & 0x80)) 259 { 260 if(OPL->status & OPL->statusmask) 261 { /* IRQ on */ 262 OPL->status |= 0x80; 263 /* callback user interrupt handler (IRQ is OFF to ON) */ 264 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1); 265 } 266 } 267 } 268 269 /* status reset and IRQ handling */ 270 static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag) 271 { 272 /* reset status flag */ 273 OPL->status &=~flag; 274 if((OPL->status & 0x80)) 275 { 276 if (!(OPL->status & OPL->statusmask) ) 277 { 278 OPL->status &= 0x7f; 279 /* callback user interrupt handler (IRQ is ON to OFF) */ 280 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0); 281 } 282 } 283 } 284 285 /* IRQ mask set */ 286 static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) 287 { 288 OPL->statusmask = flag; 289 /* IRQ handling check */ 290 OPL_STATUS_SET(OPL,0); 291 OPL_STATUS_RESET(OPL,0); 292 } 293 294 /* ----- key on ----- */ 295 static inline void OPL_KEYON(OPL_SLOT *SLOT) 296 { 297 /* sin wave restart */ 298 SLOT->Cnt = 0; 299 /* set attack */ 300 SLOT->evm = ENV_MOD_AR; 301 SLOT->evs = SLOT->evsa; 302 SLOT->evc = EG_AST; 303 SLOT->eve = EG_AED; 304 } 305 /* ----- key off ----- */ 306 static inline void OPL_KEYOFF(OPL_SLOT *SLOT) 307 { 308 if( SLOT->evm > ENV_MOD_RR) 309 { 310 /* set envelope counter from envleope output */ 311 SLOT->evm = ENV_MOD_RR; 312 if( !(SLOT->evc&EG_DST) ) 313 //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST; 314 SLOT->evc = EG_DST; 315 SLOT->eve = EG_DED; 316 SLOT->evs = SLOT->evsr; 317 } 318 } 319 320 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */ 321 /* return : envelope output */ 322 static inline uint32_t OPL_CALC_SLOT( OPL_SLOT *SLOT ) 323 { 324 /* calcrate envelope generator */ 325 if( (SLOT->evc+=SLOT->evs) >= SLOT->eve ) 326 { 327 switch( SLOT->evm ){ 328 case ENV_MOD_AR: /* ATTACK -> DECAY1 */ 329 /* next DR */ 330 SLOT->evm = ENV_MOD_DR; 331 SLOT->evc = EG_DST; 332 SLOT->eve = SLOT->SL; 333 SLOT->evs = SLOT->evsd; 334 break; 335 case ENV_MOD_DR: /* DECAY -> SL or RR */ 336 SLOT->evc = SLOT->SL; 337 SLOT->eve = EG_DED; 338 if(SLOT->eg_typ) 339 { 340 SLOT->evs = 0; 341 } 342 else 343 { 344 SLOT->evm = ENV_MOD_RR; 345 SLOT->evs = SLOT->evsr; 346 } 347 break; 348 case ENV_MOD_RR: /* RR -> OFF */ 349 SLOT->evc = EG_OFF; 350 SLOT->eve = EG_OFF+1; 351 SLOT->evs = 0; 352 break; 353 } 354 } 355 /* calcrate envelope */ 356 return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0); 357 } 358 359 /* set algorithm connection */ 360 static void set_algorithm( OPL_CH *CH) 361 { 362 int32_t *carrier = &outd[0]; 363 CH->connect1 = CH->CON ? carrier : &feedback2; 364 CH->connect2 = carrier; 365 } 366 367 /* ---------- frequency counter for operater update ---------- */ 368 static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT) 369 { 370 int ksr; 371 372 /* frequency step counter */ 373 SLOT->Incr = CH->fc * SLOT->mul; 374 ksr = CH->kcode >> SLOT->KSR; 375 376 if( SLOT->ksr != ksr ) 377 { 378 SLOT->ksr = ksr; 379 /* attack , decay rate recalcration */ 380 SLOT->evsa = SLOT->AR[ksr]; 381 SLOT->evsd = SLOT->DR[ksr]; 382 SLOT->evsr = SLOT->RR[ksr]; 383 } 384 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 385 } 386 387 /* set multi,am,vib,EG-TYP,KSR,mul */ 388 static inline void set_mul(FM_OPL *OPL,int slot,int v) 389 { 390 OPL_CH *CH = &OPL->P_CH[slot/2]; 391 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 392 393 SLOT->mul = MUL_TABLE[v&0x0f]; 394 SLOT->KSR = (v&0x10) ? 0 : 2; 395 SLOT->eg_typ = (v&0x20)>>5; 396 SLOT->vib = (v&0x40); 397 SLOT->ams = (v&0x80); 398 CALC_FCSLOT(CH,SLOT); 399 } 400 401 /* set ksl & tl */ 402 static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v) 403 { 404 OPL_CH *CH = &OPL->P_CH[slot/2]; 405 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 406 int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */ 407 408 SLOT->ksl = ksl ? 3-ksl : 31; 409 SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */ 410 411 if( !(OPL->mode&0x80) ) 412 { /* not CSM latch total level */ 413 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 414 } 415 } 416 417 /* set attack rate & decay rate */ 418 static inline void set_ar_dr(FM_OPL *OPL,int slot,int v) 419 { 420 OPL_CH *CH = &OPL->P_CH[slot/2]; 421 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 422 int ar = v>>4; 423 int dr = v&0x0f; 424 425 SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0; 426 SLOT->evsa = SLOT->AR[SLOT->ksr]; 427 if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa; 428 429 SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0; 430 SLOT->evsd = SLOT->DR[SLOT->ksr]; 431 if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd; 432 } 433 434 /* set sustain level & release rate */ 435 static inline void set_sl_rr(FM_OPL *OPL,int slot,int v) 436 { 437 OPL_CH *CH = &OPL->P_CH[slot/2]; 438 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 439 int sl = v>>4; 440 int rr = v & 0x0f; 441 442 SLOT->SL = SL_TABLE[sl]; 443 if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL; 444 SLOT->RR = &OPL->DR_TABLE[rr<<2]; 445 SLOT->evsr = SLOT->RR[SLOT->ksr]; 446 if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr; 447 } 448 449 /* operator output calcrator */ 450 #define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env] 451 /* ---------- calcrate one of channel ---------- */ 452 static inline void OPL_CALC_CH( OPL_CH *CH ) 453 { 454 uint32_t env_out; 455 OPL_SLOT *SLOT; 456 457 feedback2 = 0; 458 /* SLOT 1 */ 459 SLOT = &CH->SLOT[SLOT1]; 460 env_out=OPL_CALC_SLOT(SLOT); 461 if( env_out < EG_ENT-1 ) 462 { 463 /* PG */ 464 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 465 else SLOT->Cnt += SLOT->Incr; 466 /* connectoion */ 467 if(CH->FB) 468 { 469 int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB; 470 CH->op1_out[1] = CH->op1_out[0]; 471 *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 472 } 473 else 474 { 475 *CH->connect1 += OP_OUT(SLOT,env_out,0); 476 } 477 }else 478 { 479 CH->op1_out[1] = CH->op1_out[0]; 480 CH->op1_out[0] = 0; 481 } 482 /* SLOT 2 */ 483 SLOT = &CH->SLOT[SLOT2]; 484 env_out=OPL_CALC_SLOT(SLOT); 485 if( env_out < EG_ENT-1 ) 486 { 487 /* PG */ 488 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 489 else SLOT->Cnt += SLOT->Incr; 490 /* connectoion */ 491 outd[0] += OP_OUT(SLOT,env_out, feedback2); 492 } 493 } 494 495 /* ---------- calcrate rhythm block ---------- */ 496 #define WHITE_NOISE_db 6.0 497 static inline void OPL_CALC_RH( OPL_CH *CH ) 498 { 499 uint32_t env_tam,env_sd,env_top,env_hh; 500 int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP); 501 int32_t tone8; 502 503 OPL_SLOT *SLOT; 504 int env_out; 505 506 /* BD : same as FM serial mode and output level is large */ 507 feedback2 = 0; 508 /* SLOT 1 */ 509 SLOT = &CH[6].SLOT[SLOT1]; 510 env_out=OPL_CALC_SLOT(SLOT); 511 if( env_out < EG_ENT-1 ) 512 { 513 /* PG */ 514 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 515 else SLOT->Cnt += SLOT->Incr; 516 /* connectoion */ 517 if(CH[6].FB) 518 { 519 int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB; 520 CH[6].op1_out[1] = CH[6].op1_out[0]; 521 feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 522 } 523 else 524 { 525 feedback2 = OP_OUT(SLOT,env_out,0); 526 } 527 }else 528 { 529 feedback2 = 0; 530 CH[6].op1_out[1] = CH[6].op1_out[0]; 531 CH[6].op1_out[0] = 0; 532 } 533 /* SLOT 2 */ 534 SLOT = &CH[6].SLOT[SLOT2]; 535 env_out=OPL_CALC_SLOT(SLOT); 536 if( env_out < EG_ENT-1 ) 537 { 538 /* PG */ 539 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 540 else SLOT->Cnt += SLOT->Incr; 541 /* connectoion */ 542 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2; 543 } 544 545 // SD (17) = mul14[fnum7] + white noise 546 // TAM (15) = mul15[fnum8] 547 // TOP (18) = fnum6(mul18[fnum8]+whitenoise) 548 // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise 549 env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise; 550 env_tam=OPL_CALC_SLOT(SLOT8_1); 551 env_top=OPL_CALC_SLOT(SLOT8_2); 552 env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise; 553 554 /* PG */ 555 if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE); 556 else SLOT7_1->Cnt += 2*SLOT7_1->Incr; 557 if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE); 558 else SLOT7_2->Cnt += (CH[7].fc*8); 559 if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE); 560 else SLOT8_1->Cnt += SLOT8_1->Incr; 561 if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE); 562 else SLOT8_2->Cnt += (CH[8].fc*48); 563 564 tone8 = OP_OUT(SLOT8_2,whitenoise,0 ); 565 566 /* SD */ 567 if( env_sd < EG_ENT-1 ) 568 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8; 569 /* TAM */ 570 if( env_tam < EG_ENT-1 ) 571 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2; 572 /* TOP-CY */ 573 if( env_top < EG_ENT-1 ) 574 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2; 575 /* HH */ 576 if( env_hh < EG_ENT-1 ) 577 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2; 578 } 579 580 /* ----------- initialize time tabls ----------- */ 581 static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE ) 582 { 583 int i; 584 double rate; 585 586 /* make attack rate & decay rate tables */ 587 for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; 588 for (i = 4;i <= 60;i++){ 589 rate = OPL->freqbase; /* frequency rate */ 590 if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ 591 rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */ 592 rate *= (double)(EG_ENT<<ENV_BITS); 593 OPL->AR_TABLE[i] = rate / ARRATE; 594 OPL->DR_TABLE[i] = rate / DRRATE; 595 } 596 for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++) 597 { 598 OPL->AR_TABLE[i] = EG_AED-1; 599 OPL->DR_TABLE[i] = OPL->DR_TABLE[60]; 600 } 601 #if 0 602 for (i = 0;i < 64 ;i++){ /* make for overflow area */ 603 LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i, 604 ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate), 605 ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) )); 606 } 607 #endif 608 } 609 610 /* ---------- generic table initialize ---------- */ 611 static int OPLOpenTable( void ) 612 { 613 int s,t; 614 double rate; 615 int i,j; 616 double pom; 617 618 /* allocate dynamic tables */ 619 if( (TL_TABLE = malloc(TL_MAX*2*sizeof(int32_t))) == NULL) 620 return 0; 621 if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(int32_t *))) == NULL) 622 { 623 free(TL_TABLE); 624 return 0; 625 } 626 if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(int32_t))) == NULL) 627 { 628 free(TL_TABLE); 629 free(SIN_TABLE); 630 return 0; 631 } 632 if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(int32_t))) == NULL) 633 { 634 free(TL_TABLE); 635 free(SIN_TABLE); 636 free(AMS_TABLE); 637 return 0; 638 } 639 /* make total level table */ 640 for (t = 0;t < EG_ENT-1 ;t++){ 641 rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */ 642 TL_TABLE[ t] = (int)rate; 643 TL_TABLE[TL_MAX+t] = -TL_TABLE[t]; 644 /* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/ 645 } 646 /* fill volume off area */ 647 for ( t = EG_ENT-1; t < TL_MAX ;t++){ 648 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0; 649 } 650 651 /* make sinwave table (total level offet) */ 652 /* degree 0 = degree 180 = off */ 653 SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1]; 654 for (s = 1;s <= SIN_ENT/4;s++){ 655 pom = sin(2*PI*s/SIN_ENT); /* sin */ 656 pom = 20*log10(1/pom); /* decibel */ 657 j = pom / EG_STEP; /* TL_TABLE steps */ 658 659 /* degree 0 - 90 , degree 180 - 90 : plus section */ 660 SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j]; 661 /* degree 180 - 270 , degree 360 - 270 : minus section */ 662 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j]; 663 /* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/ 664 } 665 for (s = 0;s < SIN_ENT;s++) 666 { 667 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; 668 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)]; 669 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s]; 670 } 671 672 /* envelope counter -> envelope output table */ 673 for (i=0; i<EG_ENT; i++) 674 { 675 /* ATTACK curve */ 676 pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT; 677 /* if( pom >= EG_ENT ) pom = EG_ENT-1; */ 678 ENV_CURVE[i] = (int)pom; 679 /* DECAY ,RELEASE curve */ 680 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i; 681 } 682 /* off */ 683 ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1; 684 /* make LFO ams table */ 685 for (i=0; i<AMS_ENT; i++) 686 { 687 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ 688 AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */ 689 AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */ 690 } 691 /* make LFO vibrate table */ 692 for (i=0; i<VIB_ENT; i++) 693 { 694 /* 100cent = 1seminote = 6% ?? */ 695 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ 696 VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */ 697 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */ 698 /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */ 699 } 700 return 1; 701 } 702 703 704 static void OPLCloseTable( void ) 705 { 706 free(TL_TABLE); 707 free(SIN_TABLE); 708 free(AMS_TABLE); 709 free(VIB_TABLE); 710 } 711 712 /* CSM Key Control */ 713 static inline void CSMKeyControll(OPL_CH *CH) 714 { 715 OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; 716 OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; 717 /* all key off */ 718 OPL_KEYOFF(slot1); 719 OPL_KEYOFF(slot2); 720 /* total level latch */ 721 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 722 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 723 /* key on */ 724 CH->op1_out[0] = CH->op1_out[1] = 0; 725 OPL_KEYON(slot1); 726 OPL_KEYON(slot2); 727 } 728 729 /* ---------- opl initialize ---------- */ 730 static void OPL_initialize(FM_OPL *OPL) 731 { 732 int fn; 733 734 /* frequency base */ 735 OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; 736 /* Timer base time */ 737 OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); 738 /* make time tables */ 739 init_timetables( OPL , OPL_ARRATE , OPL_DRRATE ); 740 /* make fnumber -> increment counter table */ 741 for( fn=0 ; fn < 1024 ; fn++ ) 742 { 743 OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2; 744 } 745 /* LFO freq.table */ 746 OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0; 747 OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0; 748 } 749 750 /* ---------- write a OPL registers ---------- */ 751 static void OPLWriteReg(FM_OPL *OPL, int r, int v) 752 { 753 OPL_CH *CH; 754 int slot; 755 int block_fnum; 756 757 switch(r&0xe0) 758 { 759 case 0x00: /* 00-1f:control */ 760 switch(r&0x1f) 761 { 762 case 0x01: 763 /* wave selector enable */ 764 OPL->wavesel = v&0x20; 765 if(!OPL->wavesel) 766 { 767 /* preset compatible mode */ 768 int c; 769 for(c=0;c<OPL->max_ch;c++) 770 { 771 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0]; 772 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0]; 773 } 774 } 775 return; 776 case 0x02: /* Timer 1 */ 777 OPL->T[0] = (256-v)*4; 778 break; 779 case 0x03: /* Timer 2 */ 780 OPL->T[1] = (256-v)*16; 781 return; 782 case 0x04: /* IRQ clear / mask and Timer enable */ 783 if(v&0x80) 784 { /* IRQ flag clear */ 785 OPL_STATUS_RESET(OPL,0x7f); 786 } 787 else 788 { /* set IRQ mask ,timer enable*/ 789 uint8_t st1 = v&1; 790 uint8_t st2 = (v>>1)&1; 791 /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */ 792 OPL_STATUS_RESET(OPL,v&0x78); 793 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); 794 /* timer 2 */ 795 if(OPL->st[1] != st2) 796 { 797 double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; 798 OPL->st[1] = st2; 799 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval); 800 } 801 /* timer 1 */ 802 if(OPL->st[0] != st1) 803 { 804 double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; 805 OPL->st[0] = st1; 806 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval); 807 } 808 } 809 return; 810 } 811 break; 812 case 0x20: /* am,vib,ksr,eg type,mul */ 813 slot = slot_array[r&0x1f]; 814 if(slot == -1) return; 815 set_mul(OPL,slot,v); 816 return; 817 case 0x40: 818 slot = slot_array[r&0x1f]; 819 if(slot == -1) return; 820 set_ksl_tl(OPL,slot,v); 821 return; 822 case 0x60: 823 slot = slot_array[r&0x1f]; 824 if(slot == -1) return; 825 set_ar_dr(OPL,slot,v); 826 return; 827 case 0x80: 828 slot = slot_array[r&0x1f]; 829 if(slot == -1) return; 830 set_sl_rr(OPL,slot,v); 831 return; 832 case 0xa0: 833 switch(r) 834 { 835 case 0xbd: 836 /* amsep,vibdep,r,bd,sd,tom,tc,hh */ 837 { 838 uint8_t rkey = OPL->rhythm^v; 839 OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0]; 840 OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0]; 841 OPL->rhythm = v&0x3f; 842 if(OPL->rhythm&0x20) 843 { 844 #if 0 845 usrintf_showmessage("OPL Rhythm mode select"); 846 #endif 847 /* BD key on/off */ 848 if(rkey&0x10) 849 { 850 if(v&0x10) 851 { 852 OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; 853 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]); 854 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]); 855 } 856 else 857 { 858 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]); 859 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]); 860 } 861 } 862 /* SD key on/off */ 863 if(rkey&0x08) 864 { 865 if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); 866 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); 867 }/* TAM key on/off */ 868 if(rkey&0x04) 869 { 870 if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); 871 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); 872 } 873 /* TOP-CY key on/off */ 874 if(rkey&0x02) 875 { 876 if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); 877 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); 878 } 879 /* HH key on/off */ 880 if(rkey&0x01) 881 { 882 if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); 883 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); 884 } 885 } 886 } 887 return; 888 } 889 /* keyon,block,fnum */ 890 if( (r&0x0f) > 8) return; 891 CH = &OPL->P_CH[r&0x0f]; 892 if(!(r&0x10)) 893 { /* a0-a8 */ 894 block_fnum = (CH->block_fnum&0x1f00) | v; 895 } 896 else 897 { /* b0-b8 */ 898 int keyon = (v>>5)&1; 899 block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); 900 if(CH->keyon != keyon) 901 { 902 if( (CH->keyon=keyon) ) 903 { 904 CH->op1_out[0] = CH->op1_out[1] = 0; 905 OPL_KEYON(&CH->SLOT[SLOT1]); 906 OPL_KEYON(&CH->SLOT[SLOT2]); 907 } 908 else 909 { 910 OPL_KEYOFF(&CH->SLOT[SLOT1]); 911 OPL_KEYOFF(&CH->SLOT[SLOT2]); 912 } 913 } 914 } 915 /* update */ 916 if(CH->block_fnum != block_fnum) 917 { 918 int blockRv = 7-(block_fnum>>10); 919 int fnum = block_fnum&0x3ff; 920 CH->block_fnum = block_fnum; 921 922 CH->ksl_base = KSL_TABLE[block_fnum>>6]; 923 CH->fc = OPL->FN_TABLE[fnum]>>blockRv; 924 CH->kcode = CH->block_fnum>>9; 925 if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1; 926 CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); 927 CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); 928 } 929 return; 930 case 0xc0: 931 /* FB,C */ 932 if( (r&0x0f) > 8) return; 933 CH = &OPL->P_CH[r&0x0f]; 934 { 935 int feedback = (v>>1)&7; 936 CH->FB = feedback ? (8+1) - feedback : 0; 937 CH->CON = v&1; 938 set_algorithm(CH); 939 } 940 return; 941 case 0xe0: /* wave type */ 942 slot = slot_array[r&0x1f]; 943 if(slot == -1) return; 944 CH = &OPL->P_CH[slot/2]; 945 if(OPL->wavesel) 946 { 947 /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */ 948 CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT]; 949 } 950 return; 951 } 952 } 953 954 /* lock/unlock for common table */ 955 static int OPL_LockTable(void) 956 { 957 num_lock++; 958 if(num_lock>1) return 0; 959 /* first time */ 960 cur_chip = NULL; 961 /* allocate total level table (128kb space) */ 962 if( !OPLOpenTable() ) 963 { 964 num_lock--; 965 return -1; 966 } 967 return 0; 968 } 969 970 static void OPL_UnLockTable(void) 971 { 972 if(num_lock) num_lock--; 973 if(num_lock) return; 974 /* last time */ 975 cur_chip = NULL; 976 OPLCloseTable(); 977 } 978 979 /*******************************************************************************/ 980 /* YM3812 local section */ 981 /*******************************************************************************/ 982 983 /* ---------- update one of chip ----------- */ 984 void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length) 985 { 986 int i; 987 int data; 988 int16_t *buf = buffer; 989 uint32_t amsCnt = OPL->amsCnt; 990 uint32_t vibCnt = OPL->vibCnt; 991 uint8_t rhythm = OPL->rhythm&0x20; 992 OPL_CH *CH,*R_CH; 993 994 if( (void *)OPL != cur_chip ){ 995 cur_chip = (void *)OPL; 996 /* channel pointers */ 997 S_CH = OPL->P_CH; 998 E_CH = &S_CH[9]; 999 /* rhythm slot */ 1000 SLOT7_1 = &S_CH[7].SLOT[SLOT1]; 1001 SLOT7_2 = &S_CH[7].SLOT[SLOT2]; 1002 SLOT8_1 = &S_CH[8].SLOT[SLOT1]; 1003 SLOT8_2 = &S_CH[8].SLOT[SLOT2]; 1004 /* LFO state */ 1005 amsIncr = OPL->amsIncr; 1006 vibIncr = OPL->vibIncr; 1007 ams_table = OPL->ams_table; 1008 vib_table = OPL->vib_table; 1009 } 1010 R_CH = rhythm ? &S_CH[6] : E_CH; 1011 for( i=0; i < length ; i++ ) 1012 { 1013 /* channel A channel B channel C */ 1014 /* LFO */ 1015 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; 1016 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; 1017 outd[0] = 0; 1018 /* FM part */ 1019 for(CH=S_CH ; CH < R_CH ; CH++) 1020 OPL_CALC_CH(CH); 1021 /* Rythn part */ 1022 if(rhythm) 1023 OPL_CALC_RH(S_CH); 1024 /* limit check */ 1025 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT ); 1026 /* store to sound buffer */ 1027 buf[i] = data >> OPL_OUTSB; 1028 } 1029 1030 OPL->amsCnt = amsCnt; 1031 OPL->vibCnt = vibCnt; 1032 #ifdef OPL_OUTPUT_LOG 1033 if(opl_dbg_fp) 1034 { 1035 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1036 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1037 fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256); 1038 } 1039 #endif 1040 } 1041 1042 /* ---------- reset one of chip ---------- */ 1043 void OPLResetChip(FM_OPL *OPL) 1044 { 1045 int c,s; 1046 int i; 1047 1048 /* reset chip */ 1049 OPL->mode = 0; /* normal mode */ 1050 OPL_STATUS_RESET(OPL,0x7f); 1051 /* reset with register write */ 1052 OPLWriteReg(OPL,0x01,0); /* wabesel disable */ 1053 OPLWriteReg(OPL,0x02,0); /* Timer1 */ 1054 OPLWriteReg(OPL,0x03,0); /* Timer2 */ 1055 OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ 1056 for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); 1057 /* reset operator parameter */ 1058 for( c = 0 ; c < OPL->max_ch ; c++ ) 1059 { 1060 OPL_CH *CH = &OPL->P_CH[c]; 1061 /* OPL->P_CH[c].PAN = OPN_CENTER; */ 1062 for(s = 0 ; s < 2 ; s++ ) 1063 { 1064 /* wave table */ 1065 CH->SLOT[s].wavetable = &SIN_TABLE[0]; 1066 /* CH->SLOT[s].evm = ENV_MOD_RR; */ 1067 CH->SLOT[s].evc = EG_OFF; 1068 CH->SLOT[s].eve = EG_OFF+1; 1069 CH->SLOT[s].evs = 0; 1070 } 1071 } 1072 } 1073 1074 /* ---------- Create one of vietual YM3812 ---------- */ 1075 /* 'rate' is sampling rate and 'bufsiz' is the size of the */ 1076 FM_OPL *OPLCreate(int clock, int rate) 1077 { 1078 char *ptr; 1079 FM_OPL *OPL; 1080 int state_size; 1081 int max_ch = 9; /* normaly 9 channels */ 1082 1083 if( OPL_LockTable() ==-1) return NULL; 1084 /* allocate OPL state space */ 1085 state_size = sizeof(FM_OPL); 1086 state_size += sizeof(OPL_CH)*max_ch; 1087 /* allocate memory block */ 1088 ptr = malloc(state_size); 1089 if(ptr==NULL) return NULL; 1090 /* clear */ 1091 memset(ptr,0,state_size); 1092 OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL); 1093 OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch; 1094 /* set channel state pointer */ 1095 OPL->clock = clock; 1096 OPL->rate = rate; 1097 OPL->max_ch = max_ch; 1098 /* init grobal tables */ 1099 OPL_initialize(OPL); 1100 /* reset chip */ 1101 OPLResetChip(OPL); 1102 #ifdef OPL_OUTPUT_LOG 1103 if(!opl_dbg_fp) 1104 { 1105 opl_dbg_fp = fopen("opllog.opl","wb"); 1106 opl_dbg_maxchip = 0; 1107 } 1108 if(opl_dbg_fp) 1109 { 1110 opl_dbg_opl[opl_dbg_maxchip] = OPL; 1111 fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip, 1112 type, 1113 clock&0xff, 1114 (clock/0x100)&0xff, 1115 (clock/0x10000)&0xff, 1116 (clock/0x1000000)&0xff); 1117 opl_dbg_maxchip++; 1118 } 1119 #endif 1120 return OPL; 1121 } 1122 1123 /* ---------- Destroy one of vietual YM3812 ---------- */ 1124 void OPLDestroy(FM_OPL *OPL) 1125 { 1126 #ifdef OPL_OUTPUT_LOG 1127 if(opl_dbg_fp) 1128 { 1129 fclose(opl_dbg_fp); 1130 opl_dbg_fp = NULL; 1131 } 1132 #endif 1133 OPL_UnLockTable(); 1134 free(OPL); 1135 } 1136 1137 /* ---------- Option handlers ---------- */ 1138 1139 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset) 1140 { 1141 OPL->TimerHandler = TimerHandler; 1142 OPL->TimerParam = channelOffset; 1143 } 1144 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param) 1145 { 1146 OPL->UpdateHandler = UpdateHandler; 1147 OPL->UpdateParam = param; 1148 } 1149 /* ---------- YM3812 I/O interface ---------- */ 1150 int OPLWrite(FM_OPL *OPL,int a,int v) 1151 { 1152 if( !(a&1) ) 1153 { /* address port */ 1154 OPL->address = v & 0xff; 1155 } 1156 else 1157 { /* data port */ 1158 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1159 #ifdef OPL_OUTPUT_LOG 1160 if(opl_dbg_fp) 1161 { 1162 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1163 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1164 fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v); 1165 } 1166 #endif 1167 OPLWriteReg(OPL,OPL->address,v); 1168 } 1169 return OPL->status>>7; 1170 } 1171 1172 unsigned char OPLRead(FM_OPL *OPL,int a) 1173 { 1174 if( !(a&1) ) 1175 { /* status port */ 1176 return OPL->status & (OPL->statusmask|0x80); 1177 } 1178 /* data port */ 1179 switch(OPL->address) 1180 { 1181 case 0x05: /* KeyBoard IN */ 1182 return 0; 1183 #if 0 1184 case 0x0f: /* ADPCM-DATA */ 1185 return 0; 1186 #endif 1187 case 0x19: /* I/O DATA */ 1188 return 0; 1189 case 0x1a: /* PCM-DATA */ 1190 return 0; 1191 } 1192 return 0; 1193 } 1194 1195 int OPLTimerOver(FM_OPL *OPL,int c) 1196 { 1197 if( c ) 1198 { /* Timer B */ 1199 OPL_STATUS_SET(OPL,0x20); 1200 } 1201 else 1202 { /* Timer A */ 1203 OPL_STATUS_SET(OPL,0x40); 1204 /* CSM mode key,TL control */ 1205 if( OPL->mode & 0x80 ) 1206 { /* CSM mode total level latch and auto key on */ 1207 int ch; 1208 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0); 1209 for(ch=0;ch<9;ch++) 1210 CSMKeyControll( &OPL->P_CH[ch] ); 1211 } 1212 } 1213 /* reload timer */ 1214 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase); 1215 return OPL->status>>7; 1216 } 1217