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 } 264 } 265 } 266 267 /* status reset and IRQ handling */ 268 static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag) 269 { 270 /* reset status flag */ 271 OPL->status &=~flag; 272 if((OPL->status & 0x80)) 273 { 274 if (!(OPL->status & OPL->statusmask) ) 275 { 276 OPL->status &= 0x7f; 277 } 278 } 279 } 280 281 /* IRQ mask set */ 282 static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) 283 { 284 OPL->statusmask = flag; 285 /* IRQ handling check */ 286 OPL_STATUS_SET(OPL,0); 287 OPL_STATUS_RESET(OPL,0); 288 } 289 290 /* ----- key on ----- */ 291 static inline void OPL_KEYON(OPL_SLOT *SLOT) 292 { 293 /* sin wave restart */ 294 SLOT->Cnt = 0; 295 /* set attack */ 296 SLOT->evm = ENV_MOD_AR; 297 SLOT->evs = SLOT->evsa; 298 SLOT->evc = EG_AST; 299 SLOT->eve = EG_AED; 300 } 301 /* ----- key off ----- */ 302 static inline void OPL_KEYOFF(OPL_SLOT *SLOT) 303 { 304 if( SLOT->evm > ENV_MOD_RR) 305 { 306 /* set envelope counter from envleope output */ 307 SLOT->evm = ENV_MOD_RR; 308 if( !(SLOT->evc&EG_DST) ) 309 //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST; 310 SLOT->evc = EG_DST; 311 SLOT->eve = EG_DED; 312 SLOT->evs = SLOT->evsr; 313 } 314 } 315 316 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */ 317 /* return : envelope output */ 318 static inline uint32_t OPL_CALC_SLOT( OPL_SLOT *SLOT ) 319 { 320 /* calcrate envelope generator */ 321 if( (SLOT->evc+=SLOT->evs) >= SLOT->eve ) 322 { 323 switch( SLOT->evm ){ 324 case ENV_MOD_AR: /* ATTACK -> DECAY1 */ 325 /* next DR */ 326 SLOT->evm = ENV_MOD_DR; 327 SLOT->evc = EG_DST; 328 SLOT->eve = SLOT->SL; 329 SLOT->evs = SLOT->evsd; 330 break; 331 case ENV_MOD_DR: /* DECAY -> SL or RR */ 332 SLOT->evc = SLOT->SL; 333 SLOT->eve = EG_DED; 334 if(SLOT->eg_typ) 335 { 336 SLOT->evs = 0; 337 } 338 else 339 { 340 SLOT->evm = ENV_MOD_RR; 341 SLOT->evs = SLOT->evsr; 342 } 343 break; 344 case ENV_MOD_RR: /* RR -> OFF */ 345 SLOT->evc = EG_OFF; 346 SLOT->eve = EG_OFF+1; 347 SLOT->evs = 0; 348 break; 349 } 350 } 351 /* calcrate envelope */ 352 return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0); 353 } 354 355 /* set algorithm connection */ 356 static void set_algorithm( OPL_CH *CH) 357 { 358 int32_t *carrier = &outd[0]; 359 CH->connect1 = CH->CON ? carrier : &feedback2; 360 CH->connect2 = carrier; 361 } 362 363 /* ---------- frequency counter for operater update ---------- */ 364 static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT) 365 { 366 int ksr; 367 368 /* frequency step counter */ 369 SLOT->Incr = CH->fc * SLOT->mul; 370 ksr = CH->kcode >> SLOT->KSR; 371 372 if( SLOT->ksr != ksr ) 373 { 374 SLOT->ksr = ksr; 375 /* attack , decay rate recalcration */ 376 SLOT->evsa = SLOT->AR[ksr]; 377 SLOT->evsd = SLOT->DR[ksr]; 378 SLOT->evsr = SLOT->RR[ksr]; 379 } 380 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 381 } 382 383 /* set multi,am,vib,EG-TYP,KSR,mul */ 384 static inline void set_mul(FM_OPL *OPL,int slot,int v) 385 { 386 OPL_CH *CH = &OPL->P_CH[slot/2]; 387 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 388 389 SLOT->mul = MUL_TABLE[v&0x0f]; 390 SLOT->KSR = (v&0x10) ? 0 : 2; 391 SLOT->eg_typ = (v&0x20)>>5; 392 SLOT->vib = (v&0x40); 393 SLOT->ams = (v&0x80); 394 CALC_FCSLOT(CH,SLOT); 395 } 396 397 /* set ksl & tl */ 398 static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v) 399 { 400 OPL_CH *CH = &OPL->P_CH[slot/2]; 401 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 402 int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */ 403 404 SLOT->ksl = ksl ? 3-ksl : 31; 405 SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */ 406 407 if( !(OPL->mode&0x80) ) 408 { /* not CSM latch total level */ 409 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); 410 } 411 } 412 413 /* set attack rate & decay rate */ 414 static inline void set_ar_dr(FM_OPL *OPL,int slot,int v) 415 { 416 OPL_CH *CH = &OPL->P_CH[slot/2]; 417 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 418 int ar = v>>4; 419 int dr = v&0x0f; 420 421 SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0; 422 SLOT->evsa = SLOT->AR[SLOT->ksr]; 423 if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa; 424 425 SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0; 426 SLOT->evsd = SLOT->DR[SLOT->ksr]; 427 if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd; 428 } 429 430 /* set sustain level & release rate */ 431 static inline void set_sl_rr(FM_OPL *OPL,int slot,int v) 432 { 433 OPL_CH *CH = &OPL->P_CH[slot/2]; 434 OPL_SLOT *SLOT = &CH->SLOT[slot&1]; 435 int sl = v>>4; 436 int rr = v & 0x0f; 437 438 SLOT->SL = SL_TABLE[sl]; 439 if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL; 440 SLOT->RR = &OPL->DR_TABLE[rr<<2]; 441 SLOT->evsr = SLOT->RR[SLOT->ksr]; 442 if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr; 443 } 444 445 /* operator output calcrator */ 446 #define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env] 447 /* ---------- calcrate one of channel ---------- */ 448 static inline void OPL_CALC_CH( OPL_CH *CH ) 449 { 450 uint32_t env_out; 451 OPL_SLOT *SLOT; 452 453 feedback2 = 0; 454 /* SLOT 1 */ 455 SLOT = &CH->SLOT[SLOT1]; 456 env_out=OPL_CALC_SLOT(SLOT); 457 if( env_out < EG_ENT-1 ) 458 { 459 /* PG */ 460 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 461 else SLOT->Cnt += SLOT->Incr; 462 /* connectoion */ 463 if(CH->FB) 464 { 465 int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB; 466 CH->op1_out[1] = CH->op1_out[0]; 467 *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 468 } 469 else 470 { 471 *CH->connect1 += OP_OUT(SLOT,env_out,0); 472 } 473 }else 474 { 475 CH->op1_out[1] = CH->op1_out[0]; 476 CH->op1_out[0] = 0; 477 } 478 /* SLOT 2 */ 479 SLOT = &CH->SLOT[SLOT2]; 480 env_out=OPL_CALC_SLOT(SLOT); 481 if( env_out < EG_ENT-1 ) 482 { 483 /* PG */ 484 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 485 else SLOT->Cnt += SLOT->Incr; 486 /* connectoion */ 487 outd[0] += OP_OUT(SLOT,env_out, feedback2); 488 } 489 } 490 491 /* ---------- calcrate rhythm block ---------- */ 492 #define WHITE_NOISE_db 6.0 493 static inline void OPL_CALC_RH( OPL_CH *CH ) 494 { 495 uint32_t env_tam,env_sd,env_top,env_hh; 496 int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP); 497 int32_t tone8; 498 499 OPL_SLOT *SLOT; 500 int env_out; 501 502 /* BD : same as FM serial mode and output level is large */ 503 feedback2 = 0; 504 /* SLOT 1 */ 505 SLOT = &CH[6].SLOT[SLOT1]; 506 env_out=OPL_CALC_SLOT(SLOT); 507 if( env_out < EG_ENT-1 ) 508 { 509 /* PG */ 510 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 511 else SLOT->Cnt += SLOT->Incr; 512 /* connectoion */ 513 if(CH[6].FB) 514 { 515 int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB; 516 CH[6].op1_out[1] = CH[6].op1_out[0]; 517 feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1); 518 } 519 else 520 { 521 feedback2 = OP_OUT(SLOT,env_out,0); 522 } 523 }else 524 { 525 feedback2 = 0; 526 CH[6].op1_out[1] = CH[6].op1_out[0]; 527 CH[6].op1_out[0] = 0; 528 } 529 /* SLOT 2 */ 530 SLOT = &CH[6].SLOT[SLOT2]; 531 env_out=OPL_CALC_SLOT(SLOT); 532 if( env_out < EG_ENT-1 ) 533 { 534 /* PG */ 535 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); 536 else SLOT->Cnt += SLOT->Incr; 537 /* connectoion */ 538 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2; 539 } 540 541 // SD (17) = mul14[fnum7] + white noise 542 // TAM (15) = mul15[fnum8] 543 // TOP (18) = fnum6(mul18[fnum8]+whitenoise) 544 // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise 545 env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise; 546 env_tam=OPL_CALC_SLOT(SLOT8_1); 547 env_top=OPL_CALC_SLOT(SLOT8_2); 548 env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise; 549 550 /* PG */ 551 if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE); 552 else SLOT7_1->Cnt += 2*SLOT7_1->Incr; 553 if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE); 554 else SLOT7_2->Cnt += (CH[7].fc*8); 555 if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE); 556 else SLOT8_1->Cnt += SLOT8_1->Incr; 557 if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE); 558 else SLOT8_2->Cnt += (CH[8].fc*48); 559 560 tone8 = OP_OUT(SLOT8_2,whitenoise,0 ); 561 562 /* SD */ 563 if( env_sd < EG_ENT-1 ) 564 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8; 565 /* TAM */ 566 if( env_tam < EG_ENT-1 ) 567 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2; 568 /* TOP-CY */ 569 if( env_top < EG_ENT-1 ) 570 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2; 571 /* HH */ 572 if( env_hh < EG_ENT-1 ) 573 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2; 574 } 575 576 /* ----------- initialize time tabls ----------- */ 577 static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE ) 578 { 579 int i; 580 double rate; 581 582 /* make attack rate & decay rate tables */ 583 for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; 584 for (i = 4;i <= 60;i++){ 585 rate = OPL->freqbase; /* frequency rate */ 586 if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ 587 rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */ 588 rate *= (double)(EG_ENT<<ENV_BITS); 589 OPL->AR_TABLE[i] = rate / ARRATE; 590 OPL->DR_TABLE[i] = rate / DRRATE; 591 } 592 for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++) 593 { 594 OPL->AR_TABLE[i] = EG_AED-1; 595 OPL->DR_TABLE[i] = OPL->DR_TABLE[60]; 596 } 597 #if 0 598 for (i = 0;i < 64 ;i++){ /* make for overflow area */ 599 LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i, 600 ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate), 601 ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) )); 602 } 603 #endif 604 } 605 606 /* ---------- generic table initialize ---------- */ 607 static int OPLOpenTable( void ) 608 { 609 int s,t; 610 double rate; 611 int i,j; 612 double pom; 613 614 /* allocate dynamic tables */ 615 if( (TL_TABLE = malloc(TL_MAX*2*sizeof(int32_t))) == NULL) 616 return 0; 617 if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(int32_t *))) == NULL) 618 { 619 free(TL_TABLE); 620 return 0; 621 } 622 if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(int32_t))) == NULL) 623 { 624 free(TL_TABLE); 625 free(SIN_TABLE); 626 return 0; 627 } 628 if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(int32_t))) == NULL) 629 { 630 free(TL_TABLE); 631 free(SIN_TABLE); 632 free(AMS_TABLE); 633 return 0; 634 } 635 /* make total level table */ 636 for (t = 0;t < EG_ENT-1 ;t++){ 637 rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */ 638 TL_TABLE[ t] = (int)rate; 639 TL_TABLE[TL_MAX+t] = -TL_TABLE[t]; 640 /* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/ 641 } 642 /* fill volume off area */ 643 for ( t = EG_ENT-1; t < TL_MAX ;t++){ 644 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0; 645 } 646 647 /* make sinwave table (total level offet) */ 648 /* degree 0 = degree 180 = off */ 649 SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1]; 650 for (s = 1;s <= SIN_ENT/4;s++){ 651 pom = sin(2*PI*s/SIN_ENT); /* sin */ 652 pom = 20*log10(1/pom); /* decibel */ 653 j = pom / EG_STEP; /* TL_TABLE steps */ 654 655 /* degree 0 - 90 , degree 180 - 90 : plus section */ 656 SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j]; 657 /* degree 180 - 270 , degree 360 - 270 : minus section */ 658 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j]; 659 /* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/ 660 } 661 for (s = 0;s < SIN_ENT;s++) 662 { 663 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; 664 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)]; 665 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s]; 666 } 667 668 /* envelope counter -> envelope output table */ 669 for (i=0; i<EG_ENT; i++) 670 { 671 /* ATTACK curve */ 672 pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT; 673 /* if( pom >= EG_ENT ) pom = EG_ENT-1; */ 674 ENV_CURVE[i] = (int)pom; 675 /* DECAY ,RELEASE curve */ 676 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i; 677 } 678 /* off */ 679 ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1; 680 /* make LFO ams table */ 681 for (i=0; i<AMS_ENT; i++) 682 { 683 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ 684 AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */ 685 AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */ 686 } 687 /* make LFO vibrate table */ 688 for (i=0; i<VIB_ENT; i++) 689 { 690 /* 100cent = 1seminote = 6% ?? */ 691 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ 692 VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */ 693 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */ 694 /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */ 695 } 696 return 1; 697 } 698 699 700 static void OPLCloseTable( void ) 701 { 702 free(TL_TABLE); 703 free(SIN_TABLE); 704 free(AMS_TABLE); 705 free(VIB_TABLE); 706 } 707 708 /* CSM Key Control */ 709 static inline void CSMKeyControll(OPL_CH *CH) 710 { 711 OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; 712 OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; 713 /* all key off */ 714 OPL_KEYOFF(slot1); 715 OPL_KEYOFF(slot2); 716 /* total level latch */ 717 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 718 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); 719 /* key on */ 720 CH->op1_out[0] = CH->op1_out[1] = 0; 721 OPL_KEYON(slot1); 722 OPL_KEYON(slot2); 723 } 724 725 /* ---------- opl initialize ---------- */ 726 static void OPL_initialize(FM_OPL *OPL) 727 { 728 int fn; 729 730 /* frequency base */ 731 OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; 732 /* Timer base time */ 733 OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); 734 /* make time tables */ 735 init_timetables( OPL , OPL_ARRATE , OPL_DRRATE ); 736 /* make fnumber -> increment counter table */ 737 for( fn=0 ; fn < 1024 ; fn++ ) 738 { 739 OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2; 740 } 741 /* LFO freq.table */ 742 OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0; 743 OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0; 744 } 745 746 /* ---------- write a OPL registers ---------- */ 747 static void OPLWriteReg(FM_OPL *OPL, int r, int v) 748 { 749 OPL_CH *CH; 750 int slot; 751 int block_fnum; 752 753 switch(r&0xe0) 754 { 755 case 0x00: /* 00-1f:control */ 756 switch(r&0x1f) 757 { 758 case 0x01: 759 /* wave selector enable */ 760 OPL->wavesel = v&0x20; 761 if(!OPL->wavesel) 762 { 763 /* preset compatible mode */ 764 int c; 765 for(c=0;c<OPL->max_ch;c++) 766 { 767 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0]; 768 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0]; 769 } 770 } 771 return; 772 case 0x02: /* Timer 1 */ 773 OPL->T[0] = (256-v)*4; 774 break; 775 case 0x03: /* Timer 2 */ 776 OPL->T[1] = (256-v)*16; 777 return; 778 case 0x04: /* IRQ clear / mask and Timer enable */ 779 if(v&0x80) 780 { /* IRQ flag clear */ 781 OPL_STATUS_RESET(OPL,0x7f); 782 } 783 else 784 { /* set IRQ mask ,timer enable*/ 785 uint8_t st1 = v&1; 786 uint8_t st2 = (v>>1)&1; 787 /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */ 788 OPL_STATUS_RESET(OPL,v&0x78); 789 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); 790 /* timer 2 */ 791 if(OPL->st[1] != st2) 792 { 793 double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; 794 OPL->st[1] = st2; 795 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval); 796 } 797 /* timer 1 */ 798 if(OPL->st[0] != st1) 799 { 800 double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; 801 OPL->st[0] = st1; 802 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval); 803 } 804 } 805 return; 806 } 807 break; 808 case 0x20: /* am,vib,ksr,eg type,mul */ 809 slot = slot_array[r&0x1f]; 810 if(slot == -1) return; 811 set_mul(OPL,slot,v); 812 return; 813 case 0x40: 814 slot = slot_array[r&0x1f]; 815 if(slot == -1) return; 816 set_ksl_tl(OPL,slot,v); 817 return; 818 case 0x60: 819 slot = slot_array[r&0x1f]; 820 if(slot == -1) return; 821 set_ar_dr(OPL,slot,v); 822 return; 823 case 0x80: 824 slot = slot_array[r&0x1f]; 825 if(slot == -1) return; 826 set_sl_rr(OPL,slot,v); 827 return; 828 case 0xa0: 829 switch(r) 830 { 831 case 0xbd: 832 /* amsep,vibdep,r,bd,sd,tom,tc,hh */ 833 { 834 uint8_t rkey = OPL->rhythm^v; 835 OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0]; 836 OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0]; 837 OPL->rhythm = v&0x3f; 838 if(OPL->rhythm&0x20) 839 { 840 #if 0 841 usrintf_showmessage("OPL Rhythm mode select"); 842 #endif 843 /* BD key on/off */ 844 if(rkey&0x10) 845 { 846 if(v&0x10) 847 { 848 OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; 849 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]); 850 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]); 851 } 852 else 853 { 854 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]); 855 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]); 856 } 857 } 858 /* SD key on/off */ 859 if(rkey&0x08) 860 { 861 if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); 862 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); 863 }/* TAM key on/off */ 864 if(rkey&0x04) 865 { 866 if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); 867 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); 868 } 869 /* TOP-CY key on/off */ 870 if(rkey&0x02) 871 { 872 if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); 873 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); 874 } 875 /* HH key on/off */ 876 if(rkey&0x01) 877 { 878 if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); 879 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); 880 } 881 } 882 } 883 return; 884 } 885 /* keyon,block,fnum */ 886 if( (r&0x0f) > 8) return; 887 CH = &OPL->P_CH[r&0x0f]; 888 if(!(r&0x10)) 889 { /* a0-a8 */ 890 block_fnum = (CH->block_fnum&0x1f00) | v; 891 } 892 else 893 { /* b0-b8 */ 894 int keyon = (v>>5)&1; 895 block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); 896 if(CH->keyon != keyon) 897 { 898 if( (CH->keyon=keyon) ) 899 { 900 CH->op1_out[0] = CH->op1_out[1] = 0; 901 OPL_KEYON(&CH->SLOT[SLOT1]); 902 OPL_KEYON(&CH->SLOT[SLOT2]); 903 } 904 else 905 { 906 OPL_KEYOFF(&CH->SLOT[SLOT1]); 907 OPL_KEYOFF(&CH->SLOT[SLOT2]); 908 } 909 } 910 } 911 /* update */ 912 if(CH->block_fnum != block_fnum) 913 { 914 int blockRv = 7-(block_fnum>>10); 915 int fnum = block_fnum&0x3ff; 916 CH->block_fnum = block_fnum; 917 918 CH->ksl_base = KSL_TABLE[block_fnum>>6]; 919 CH->fc = OPL->FN_TABLE[fnum]>>blockRv; 920 CH->kcode = CH->block_fnum>>9; 921 if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1; 922 CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); 923 CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); 924 } 925 return; 926 case 0xc0: 927 /* FB,C */ 928 if( (r&0x0f) > 8) return; 929 CH = &OPL->P_CH[r&0x0f]; 930 { 931 int feedback = (v>>1)&7; 932 CH->FB = feedback ? (8+1) - feedback : 0; 933 CH->CON = v&1; 934 set_algorithm(CH); 935 } 936 return; 937 case 0xe0: /* wave type */ 938 slot = slot_array[r&0x1f]; 939 if(slot == -1) return; 940 CH = &OPL->P_CH[slot/2]; 941 if(OPL->wavesel) 942 { 943 /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */ 944 CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT]; 945 } 946 return; 947 } 948 } 949 950 /* lock/unlock for common table */ 951 static int OPL_LockTable(void) 952 { 953 num_lock++; 954 if(num_lock>1) return 0; 955 /* first time */ 956 cur_chip = NULL; 957 /* allocate total level table (128kb space) */ 958 if( !OPLOpenTable() ) 959 { 960 num_lock--; 961 return -1; 962 } 963 return 0; 964 } 965 966 static void OPL_UnLockTable(void) 967 { 968 if(num_lock) num_lock--; 969 if(num_lock) return; 970 /* last time */ 971 cur_chip = NULL; 972 OPLCloseTable(); 973 } 974 975 /*******************************************************************************/ 976 /* YM3812 local section */ 977 /*******************************************************************************/ 978 979 /* ---------- update one of chip ----------- */ 980 void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length) 981 { 982 int i; 983 int data; 984 int16_t *buf = buffer; 985 uint32_t amsCnt = OPL->amsCnt; 986 uint32_t vibCnt = OPL->vibCnt; 987 uint8_t rhythm = OPL->rhythm&0x20; 988 OPL_CH *CH,*R_CH; 989 990 if( (void *)OPL != cur_chip ){ 991 cur_chip = (void *)OPL; 992 /* channel pointers */ 993 S_CH = OPL->P_CH; 994 E_CH = &S_CH[9]; 995 /* rhythm slot */ 996 SLOT7_1 = &S_CH[7].SLOT[SLOT1]; 997 SLOT7_2 = &S_CH[7].SLOT[SLOT2]; 998 SLOT8_1 = &S_CH[8].SLOT[SLOT1]; 999 SLOT8_2 = &S_CH[8].SLOT[SLOT2]; 1000 /* LFO state */ 1001 amsIncr = OPL->amsIncr; 1002 vibIncr = OPL->vibIncr; 1003 ams_table = OPL->ams_table; 1004 vib_table = OPL->vib_table; 1005 } 1006 R_CH = rhythm ? &S_CH[6] : E_CH; 1007 for( i=0; i < length ; i++ ) 1008 { 1009 /* channel A channel B channel C */ 1010 /* LFO */ 1011 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; 1012 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; 1013 outd[0] = 0; 1014 /* FM part */ 1015 for(CH=S_CH ; CH < R_CH ; CH++) 1016 OPL_CALC_CH(CH); 1017 /* Rythn part */ 1018 if(rhythm) 1019 OPL_CALC_RH(S_CH); 1020 /* limit check */ 1021 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT ); 1022 /* store to sound buffer */ 1023 buf[i] = data >> OPL_OUTSB; 1024 } 1025 1026 OPL->amsCnt = amsCnt; 1027 OPL->vibCnt = vibCnt; 1028 #ifdef OPL_OUTPUT_LOG 1029 if(opl_dbg_fp) 1030 { 1031 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1032 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1033 fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256); 1034 } 1035 #endif 1036 } 1037 1038 /* ---------- reset one of chip ---------- */ 1039 void OPLResetChip(FM_OPL *OPL) 1040 { 1041 int c,s; 1042 int i; 1043 1044 /* reset chip */ 1045 OPL->mode = 0; /* normal mode */ 1046 OPL_STATUS_RESET(OPL,0x7f); 1047 /* reset with register write */ 1048 OPLWriteReg(OPL,0x01,0); /* wabesel disable */ 1049 OPLWriteReg(OPL,0x02,0); /* Timer1 */ 1050 OPLWriteReg(OPL,0x03,0); /* Timer2 */ 1051 OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ 1052 for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); 1053 /* reset operator parameter */ 1054 for( c = 0 ; c < OPL->max_ch ; c++ ) 1055 { 1056 OPL_CH *CH = &OPL->P_CH[c]; 1057 /* OPL->P_CH[c].PAN = OPN_CENTER; */ 1058 for(s = 0 ; s < 2 ; s++ ) 1059 { 1060 /* wave table */ 1061 CH->SLOT[s].wavetable = &SIN_TABLE[0]; 1062 /* CH->SLOT[s].evm = ENV_MOD_RR; */ 1063 CH->SLOT[s].evc = EG_OFF; 1064 CH->SLOT[s].eve = EG_OFF+1; 1065 CH->SLOT[s].evs = 0; 1066 } 1067 } 1068 } 1069 1070 /* ---------- Create one of vietual YM3812 ---------- */ 1071 /* 'rate' is sampling rate and 'bufsiz' is the size of the */ 1072 FM_OPL *OPLCreate(int clock, int rate) 1073 { 1074 char *ptr; 1075 FM_OPL *OPL; 1076 int state_size; 1077 int max_ch = 9; /* normaly 9 channels */ 1078 1079 if( OPL_LockTable() ==-1) return NULL; 1080 /* allocate OPL state space */ 1081 state_size = sizeof(FM_OPL); 1082 state_size += sizeof(OPL_CH)*max_ch; 1083 /* allocate memory block */ 1084 ptr = malloc(state_size); 1085 if(ptr==NULL) return NULL; 1086 /* clear */ 1087 memset(ptr,0,state_size); 1088 OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL); 1089 OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch; 1090 /* set channel state pointer */ 1091 OPL->clock = clock; 1092 OPL->rate = rate; 1093 OPL->max_ch = max_ch; 1094 /* init grobal tables */ 1095 OPL_initialize(OPL); 1096 /* reset chip */ 1097 OPLResetChip(OPL); 1098 #ifdef OPL_OUTPUT_LOG 1099 if(!opl_dbg_fp) 1100 { 1101 opl_dbg_fp = fopen("opllog.opl","wb"); 1102 opl_dbg_maxchip = 0; 1103 } 1104 if(opl_dbg_fp) 1105 { 1106 opl_dbg_opl[opl_dbg_maxchip] = OPL; 1107 fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip, 1108 type, 1109 clock&0xff, 1110 (clock/0x100)&0xff, 1111 (clock/0x10000)&0xff, 1112 (clock/0x1000000)&0xff); 1113 opl_dbg_maxchip++; 1114 } 1115 #endif 1116 return OPL; 1117 } 1118 1119 /* ---------- Destroy one of vietual YM3812 ---------- */ 1120 void OPLDestroy(FM_OPL *OPL) 1121 { 1122 #ifdef OPL_OUTPUT_LOG 1123 if(opl_dbg_fp) 1124 { 1125 fclose(opl_dbg_fp); 1126 opl_dbg_fp = NULL; 1127 } 1128 #endif 1129 OPL_UnLockTable(); 1130 free(OPL); 1131 } 1132 1133 /* ---------- Option handlers ---------- */ 1134 1135 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset) 1136 { 1137 OPL->TimerHandler = TimerHandler; 1138 OPL->TimerParam = channelOffset; 1139 } 1140 1141 /* ---------- YM3812 I/O interface ---------- */ 1142 int OPLWrite(FM_OPL *OPL,int a,int v) 1143 { 1144 if( !(a&1) ) 1145 { /* address port */ 1146 OPL->address = v & 0xff; 1147 } 1148 else 1149 { /* data port */ 1150 #ifdef OPL_OUTPUT_LOG 1151 if(opl_dbg_fp) 1152 { 1153 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) 1154 if( opl_dbg_opl[opl_dbg_chip] == OPL) break; 1155 fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v); 1156 } 1157 #endif 1158 OPLWriteReg(OPL,OPL->address,v); 1159 } 1160 return OPL->status>>7; 1161 } 1162 1163 unsigned char OPLRead(FM_OPL *OPL,int a) 1164 { 1165 if( !(a&1) ) 1166 { /* status port */ 1167 return OPL->status & (OPL->statusmask|0x80); 1168 } 1169 /* data port */ 1170 switch(OPL->address) 1171 { 1172 case 0x05: /* KeyBoard IN */ 1173 return 0; 1174 #if 0 1175 case 0x0f: /* ADPCM-DATA */ 1176 return 0; 1177 #endif 1178 case 0x19: /* I/O DATA */ 1179 return 0; 1180 case 0x1a: /* PCM-DATA */ 1181 return 0; 1182 } 1183 return 0; 1184 } 1185 1186 int OPLTimerOver(FM_OPL *OPL,int c) 1187 { 1188 if( c ) 1189 { /* Timer B */ 1190 OPL_STATUS_SET(OPL,0x20); 1191 } 1192 else 1193 { /* Timer A */ 1194 OPL_STATUS_SET(OPL,0x40); 1195 /* CSM mode key,TL control */ 1196 if( OPL->mode & 0x80 ) 1197 { /* CSM mode total level latch and auto key on */ 1198 int ch; 1199 for(ch=0;ch<9;ch++) 1200 CSMKeyControll( &OPL->P_CH[ch] ); 1201 } 1202 } 1203 /* reload timer */ 1204 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase); 1205 return OPL->status>>7; 1206 } 1207