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