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33#include "qemu/osdep.h"
34#include <math.h>
35
36#include "fmopl.h"
37#include "qemu/osdep.h"
38#ifndef PI
39#define PI 3.14159265358979323846
40#endif
41
42
43
44#ifdef OPL_OUTPUT_LOG
45static FILE *opl_dbg_fp = NULL;
46static FM_OPL *opl_dbg_opl[16];
47static int opl_dbg_maxchip,opl_dbg_chip;
48#endif
49
50
51
52#define OPL_ARRATE 141280
53#define OPL_DRRATE 1956000
54
55#define DELTAT_MIXING_LEVEL (1)
56
57#define FREQ_BITS 24
58
59
60#define FREQ_RATE (1<<(FREQ_BITS-20))
61#define TL_BITS (FREQ_BITS+2)
62
63
64#define OPL_OUTSB (TL_BITS+3-16)
65#define OPL_MAXOUT (0x7fff<<OPL_OUTSB)
66#define OPL_MINOUT (-0x8000<<OPL_OUTSB)
67
68
69
70
71
72#define SIN_ENT 2048
73
74
75
76#define ENV_BITS 16
77
78#define EG_ENT 4096
79
80
81
82#define EG_OFF ((2*EG_ENT)<<ENV_BITS)
83#define EG_DED EG_OFF
84#define EG_DST (EG_ENT<<ENV_BITS)
85#define EG_AED EG_DST
86#define EG_AST 0
87
88#define EG_STEP (96.0/EG_ENT)
89
90
91#define VIB_ENT 512
92#define VIB_SHIFT (32-9)
93#define AMS_ENT 512
94#define AMS_SHIFT (32-9)
95
96#define VIB_RATE 256
97
98
99
100
101#define SLOT1 0
102#define SLOT2 1
103
104
105#define ENV_MOD_RR 0x00
106#define ENV_MOD_DR 0x01
107#define ENV_MOD_AR 0x02
108
109
110static const int slot_array[32]=
111{
112 0, 2, 4, 1, 3, 5,-1,-1,
113 6, 8,10, 7, 9,11,-1,-1,
114 12,14,16,13,15,17,-1,-1,
115 -1,-1,-1,-1,-1,-1,-1,-1
116};
117
118
119
120#define DV (EG_STEP/2)
121static const uint32_t KSL_TABLE[8*16]=
122{
123
124 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
125 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
126 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
127 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
128
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, 0.750/DV, 1.125/DV, 1.500/DV,
132 1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV,
133
134 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV,
135 0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV,
136 3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV,
137 4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV,
138
139 0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV,
140 3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV,
141 6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV,
142 7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV,
143
144 0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV,
145 6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV,
146 9.000/DV, 9.750/DV,10.125/DV,10.500/DV,
147 10.875/DV,11.250/DV,11.625/DV,12.000/DV,
148
149 0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV,
150 9.000/DV,10.125/DV,10.875/DV,11.625/DV,
151 12.000/DV,12.750/DV,13.125/DV,13.500/DV,
152 13.875/DV,14.250/DV,14.625/DV,15.000/DV,
153
154 0.000/DV, 6.000/DV, 9.000/DV,10.875/DV,
155 12.000/DV,13.125/DV,13.875/DV,14.625/DV,
156 15.000/DV,15.750/DV,16.125/DV,16.500/DV,
157 16.875/DV,17.250/DV,17.625/DV,18.000/DV,
158
159 0.000/DV, 9.000/DV,12.000/DV,13.875/DV,
160 15.000/DV,16.125/DV,16.875/DV,17.625/DV,
161 18.000/DV,18.750/DV,19.125/DV,19.500/DV,
162 19.875/DV,20.250/DV,20.625/DV,21.000/DV
163};
164#undef DV
165
166
167
168#define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST
169static const int32_t SL_TABLE[16]={
170 SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7),
171 SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31)
172};
173#undef SC
174
175#define TL_MAX (EG_ENT*2)
176
177
178
179static int32_t *TL_TABLE;
180
181
182static int32_t **SIN_TABLE;
183
184
185static int32_t *AMS_TABLE;
186static int32_t *VIB_TABLE;
187
188
189
190static int32_t ENV_CURVE[2*EG_ENT+1];
191
192
193#define ML 2
194static const uint32_t MUL_TABLE[16]= {
195
196 0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML,
197 8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML
198};
199#undef ML
200
201
202static int32_t RATE_0[16]=
203{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
204
205
206
207
208static int num_lock = 0;
209
210
211static void *cur_chip = NULL;
212
213
214static OPL_CH *S_CH;
215static OPL_CH *E_CH;
216static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2;
217
218static int32_t outd[1];
219static int32_t ams;
220static int32_t vib;
221static int32_t *ams_table;
222static int32_t *vib_table;
223static int32_t amsIncr;
224static int32_t vibIncr;
225static int32_t feedback2;
226
227
228#define LOG_ERR 3
229#define LOG_WAR 2
230#define LOG_INF 1
231
232
233#define LOG_LEVEL LOG_ERR
234
235
236#define LOG(n,x)
237
238
239
240static inline int Limit( int val, int max, int min ) {
241 if ( val > max )
242 val = max;
243 else if ( val < min )
244 val = min;
245
246 return val;
247}
248
249
250static inline void OPL_STATUS_SET(FM_OPL *OPL,int flag)
251{
252
253 OPL->status |= flag;
254 if(!(OPL->status & 0x80))
255 {
256 if(OPL->status & OPL->statusmask)
257 {
258 OPL->status |= 0x80;
259 }
260 }
261}
262
263
264static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag)
265{
266
267 OPL->status &=~flag;
268 if((OPL->status & 0x80))
269 {
270 if (!(OPL->status & OPL->statusmask) )
271 {
272 OPL->status &= 0x7f;
273 }
274 }
275}
276
277
278static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag)
279{
280 OPL->statusmask = flag;
281
282 OPL_STATUS_SET(OPL,0);
283 OPL_STATUS_RESET(OPL,0);
284}
285
286
287static inline void OPL_KEYON(OPL_SLOT *SLOT)
288{
289
290 SLOT->Cnt = 0;
291
292 SLOT->evm = ENV_MOD_AR;
293 SLOT->evs = SLOT->evsa;
294 SLOT->evc = EG_AST;
295 SLOT->eve = EG_AED;
296}
297
298static inline void OPL_KEYOFF(OPL_SLOT *SLOT)
299{
300 if( SLOT->evm > ENV_MOD_RR)
301 {
302
303 SLOT->evm = ENV_MOD_RR;
304 if( !(SLOT->evc&EG_DST) )
305
306 SLOT->evc = EG_DST;
307 SLOT->eve = EG_DED;
308 SLOT->evs = SLOT->evsr;
309 }
310}
311
312
313
314static inline uint32_t OPL_CALC_SLOT( OPL_SLOT *SLOT )
315{
316
317 if( (SLOT->evc+=SLOT->evs) >= SLOT->eve )
318 {
319 switch( SLOT->evm ){
320 case ENV_MOD_AR:
321
322 SLOT->evm = ENV_MOD_DR;
323 SLOT->evc = EG_DST;
324 SLOT->eve = SLOT->SL;
325 SLOT->evs = SLOT->evsd;
326 break;
327 case ENV_MOD_DR:
328 SLOT->evc = SLOT->SL;
329 SLOT->eve = EG_DED;
330 if(SLOT->eg_typ)
331 {
332 SLOT->evs = 0;
333 }
334 else
335 {
336 SLOT->evm = ENV_MOD_RR;
337 SLOT->evs = SLOT->evsr;
338 }
339 break;
340 case ENV_MOD_RR:
341 SLOT->evc = EG_OFF;
342 SLOT->eve = EG_OFF+1;
343 SLOT->evs = 0;
344 break;
345 }
346 }
347
348 return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0);
349}
350
351
352static void set_algorithm( OPL_CH *CH)
353{
354 int32_t *carrier = &outd[0];
355 CH->connect1 = CH->CON ? carrier : &feedback2;
356 CH->connect2 = carrier;
357}
358
359
360static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT)
361{
362 int ksr;
363
364
365 SLOT->Incr = CH->fc * SLOT->mul;
366 ksr = CH->kcode >> SLOT->KSR;
367
368 if( SLOT->ksr != ksr )
369 {
370 SLOT->ksr = ksr;
371
372 SLOT->evsa = SLOT->AR[ksr];
373 SLOT->evsd = SLOT->DR[ksr];
374 SLOT->evsr = SLOT->RR[ksr];
375 }
376 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
377}
378
379
380static inline void set_mul(FM_OPL *OPL,int slot,int v)
381{
382 OPL_CH *CH = &OPL->P_CH[slot/2];
383 OPL_SLOT *SLOT = &CH->SLOT[slot&1];
384
385 SLOT->mul = MUL_TABLE[v&0x0f];
386 SLOT->KSR = (v&0x10) ? 0 : 2;
387 SLOT->eg_typ = (v&0x20)>>5;
388 SLOT->vib = (v&0x40);
389 SLOT->ams = (v&0x80);
390 CALC_FCSLOT(CH,SLOT);
391}
392
393
394static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v)
395{
396 OPL_CH *CH = &OPL->P_CH[slot/2];
397 OPL_SLOT *SLOT = &CH->SLOT[slot&1];
398 int ksl = v>>6;
399
400 SLOT->ksl = ksl ? 3-ksl : 31;
401 SLOT->TL = (v&0x3f)*(0.75/EG_STEP);
402
403 if( !(OPL->mode&0x80) )
404 {
405 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
406 }
407}
408
409
410static inline void set_ar_dr(FM_OPL *OPL,int slot,int v)
411{
412 OPL_CH *CH = &OPL->P_CH[slot/2];
413 OPL_SLOT *SLOT = &CH->SLOT[slot&1];
414 int ar = v>>4;
415 int dr = v&0x0f;
416
417 SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0;
418 SLOT->evsa = SLOT->AR[SLOT->ksr];
419 if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa;
420
421 SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0;
422 SLOT->evsd = SLOT->DR[SLOT->ksr];
423 if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd;
424}
425
426
427static inline void set_sl_rr(FM_OPL *OPL,int slot,int v)
428{
429 OPL_CH *CH = &OPL->P_CH[slot/2];
430 OPL_SLOT *SLOT = &CH->SLOT[slot&1];
431 int sl = v>>4;
432 int rr = v & 0x0f;
433
434 SLOT->SL = SL_TABLE[sl];
435 if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL;
436 SLOT->RR = &OPL->DR_TABLE[rr<<2];
437 SLOT->evsr = SLOT->RR[SLOT->ksr];
438 if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr;
439}
440
441
442#define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env]
443
444static inline void OPL_CALC_CH( OPL_CH *CH )
445{
446 uint32_t env_out;
447 OPL_SLOT *SLOT;
448
449 feedback2 = 0;
450
451 SLOT = &CH->SLOT[SLOT1];
452 env_out=OPL_CALC_SLOT(SLOT);
453 if( env_out < EG_ENT-1 )
454 {
455
456 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
457 else SLOT->Cnt += SLOT->Incr;
458
459 if(CH->FB)
460 {
461 int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB;
462 CH->op1_out[1] = CH->op1_out[0];
463 *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
464 }
465 else
466 {
467 *CH->connect1 += OP_OUT(SLOT,env_out,0);
468 }
469 }else
470 {
471 CH->op1_out[1] = CH->op1_out[0];
472 CH->op1_out[0] = 0;
473 }
474
475 SLOT = &CH->SLOT[SLOT2];
476 env_out=OPL_CALC_SLOT(SLOT);
477 if( env_out < EG_ENT-1 )
478 {
479
480 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
481 else SLOT->Cnt += SLOT->Incr;
482
483 outd[0] += OP_OUT(SLOT,env_out, feedback2);
484 }
485}
486
487
488#define WHITE_NOISE_db 6.0
489static inline void OPL_CALC_RH( OPL_CH *CH )
490{
491 uint32_t env_tam,env_sd,env_top,env_hh;
492 int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP);
493 int32_t tone8;
494
495 OPL_SLOT *SLOT;
496 int env_out;
497
498
499 feedback2 = 0;
500
501 SLOT = &CH[6].SLOT[SLOT1];
502 env_out=OPL_CALC_SLOT(SLOT);
503 if( env_out < EG_ENT-1 )
504 {
505
506 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
507 else SLOT->Cnt += SLOT->Incr;
508
509 if(CH[6].FB)
510 {
511 int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB;
512 CH[6].op1_out[1] = CH[6].op1_out[0];
513 feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
514 }
515 else
516 {
517 feedback2 = OP_OUT(SLOT,env_out,0);
518 }
519 }else
520 {
521 feedback2 = 0;
522 CH[6].op1_out[1] = CH[6].op1_out[0];
523 CH[6].op1_out[0] = 0;
524 }
525
526 SLOT = &CH[6].SLOT[SLOT2];
527 env_out=OPL_CALC_SLOT(SLOT);
528 if( env_out < EG_ENT-1 )
529 {
530
531 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
532 else SLOT->Cnt += SLOT->Incr;
533
534 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2;
535 }
536
537
538
539
540
541 env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise;
542 env_tam=OPL_CALC_SLOT(SLOT8_1);
543 env_top=OPL_CALC_SLOT(SLOT8_2);
544 env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise;
545
546
547 if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE);
548 else SLOT7_1->Cnt += 2*SLOT7_1->Incr;
549 if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE);
550 else SLOT7_2->Cnt += (CH[7].fc*8);
551 if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE);
552 else SLOT8_1->Cnt += SLOT8_1->Incr;
553 if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE);
554 else SLOT8_2->Cnt += (CH[8].fc*48);
555
556 tone8 = OP_OUT(SLOT8_2,whitenoise,0 );
557
558
559 if( env_sd < EG_ENT-1 )
560 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8;
561
562 if( env_tam < EG_ENT-1 )
563 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2;
564
565 if( env_top < EG_ENT-1 )
566 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2;
567
568 if( env_hh < EG_ENT-1 )
569 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2;
570}
571
572
573static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE )
574{
575 int i;
576 double rate;
577
578
579 for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0;
580 for (i = 4;i <= 60;i++){
581 rate = OPL->freqbase;
582 if( i < 60 ) rate *= 1.0+(i&3)*0.25;
583 rate *= 1<<((i>>2)-1);
584 rate *= (double)(EG_ENT<<ENV_BITS);
585 OPL->AR_TABLE[i] = rate / ARRATE;
586 OPL->DR_TABLE[i] = rate / DRRATE;
587 }
588 for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++)
589 {
590 OPL->AR_TABLE[i] = EG_AED-1;
591 OPL->DR_TABLE[i] = OPL->DR_TABLE[60];
592 }
593#if 0
594 for (i = 0;i < 64 ;i++){
595 LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n", i,
596 ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate),
597 ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) ));
598 }
599#endif
600}
601
602
603static int OPLOpenTable( void )
604{
605 int s,t;
606 double rate;
607 int i,j;
608 double pom;
609
610
611 if( (TL_TABLE = malloc(TL_MAX*2*sizeof(int32_t))) == NULL)
612 return 0;
613 if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(int32_t *))) == NULL)
614 {
615 free(TL_TABLE);
616 return 0;
617 }
618 if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(int32_t))) == NULL)
619 {
620 free(TL_TABLE);
621 free(SIN_TABLE);
622 return 0;
623 }
624 if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(int32_t))) == NULL)
625 {
626 free(TL_TABLE);
627 free(SIN_TABLE);
628 free(AMS_TABLE);
629 return 0;
630 }
631
632 for (t = 0;t < EG_ENT-1 ;t++){
633 rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20);
634 TL_TABLE[ t] = (int)rate;
635 TL_TABLE[TL_MAX+t] = -TL_TABLE[t];
636
637 }
638
639 for ( t = EG_ENT-1; t < TL_MAX ;t++){
640 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0;
641 }
642
643
644
645 SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1];
646 for (s = 1;s <= SIN_ENT/4;s++){
647 pom = sin(2*PI*s/SIN_ENT);
648 pom = 20*log10(1/pom);
649 j = pom / EG_STEP;
650
651
652 SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j];
653
654 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j];
655
656 }
657 for (s = 0;s < SIN_ENT;s++)
658 {
659 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT];
660 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)];
661 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s];
662 }
663
664
665 for (i=0; i<EG_ENT; i++)
666 {
667
668 pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT;
669
670 ENV_CURVE[i] = (int)pom;
671
672 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i;
673 }
674
675 ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1;
676
677 for (i=0; i<AMS_ENT; i++)
678 {
679 pom = (1.0+sin(2*PI*i/AMS_ENT))/2;
680 AMS_TABLE[i] = (1.0/EG_STEP)*pom;
681 AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom;
682 }
683
684 for (i=0; i<VIB_ENT; i++)
685 {
686
687 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT);
688 VIB_TABLE[i] = VIB_RATE + (pom*0.07);
689 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14);
690
691 }
692 return 1;
693}
694
695
696static void OPLCloseTable( void )
697{
698 free(TL_TABLE);
699 free(SIN_TABLE);
700 free(AMS_TABLE);
701 free(VIB_TABLE);
702}
703
704
705static inline void CSMKeyControll(OPL_CH *CH)
706{
707 OPL_SLOT *slot1 = &CH->SLOT[SLOT1];
708 OPL_SLOT *slot2 = &CH->SLOT[SLOT2];
709
710 OPL_KEYOFF(slot1);
711 OPL_KEYOFF(slot2);
712
713 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
714 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
715
716 CH->op1_out[0] = CH->op1_out[1] = 0;
717 OPL_KEYON(slot1);
718 OPL_KEYON(slot2);
719}
720
721
722static void OPL_initialize(FM_OPL *OPL)
723{
724 int fn;
725
726
727 OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0;
728
729 OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 );
730
731 init_timetables( OPL , OPL_ARRATE , OPL_DRRATE );
732
733 for( fn=0 ; fn < 1024 ; fn++ )
734 {
735 OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2;
736 }
737
738 OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0;
739 OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0;
740}
741
742
743static void OPLWriteReg(FM_OPL *OPL, int r, int v)
744{
745 OPL_CH *CH;
746 int slot;
747 int block_fnum;
748
749 switch(r&0xe0)
750 {
751 case 0x00:
752 switch(r&0x1f)
753 {
754 case 0x01:
755
756 OPL->wavesel = v&0x20;
757 if(!OPL->wavesel)
758 {
759
760 int c;
761 for(c=0;c<OPL->max_ch;c++)
762 {
763 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
764 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
765 }
766 }
767 return;
768 case 0x02:
769 OPL->T[0] = (256-v)*4;
770 break;
771 case 0x03:
772 OPL->T[1] = (256-v)*16;
773 return;
774 case 0x04:
775 if(v&0x80)
776 {
777 OPL_STATUS_RESET(OPL,0x7f);
778 }
779 else
780 {
781 uint8_t st1 = v&1;
782 uint8_t st2 = (v>>1)&1;
783
784 OPL_STATUS_RESET(OPL,v&0x78);
785 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01);
786
787 if(OPL->st[1] != st2)
788 {
789 double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0;
790 OPL->st[1] = st2;
791 if (OPL->TimerHandler) {
792 (OPL->TimerHandler)(OPL->TimerParam, 1, interval);
793 }
794 }
795
796 if(OPL->st[0] != st1)
797 {
798 double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0;
799 OPL->st[0] = st1;
800 if (OPL->TimerHandler) {
801 (OPL->TimerHandler)(OPL->TimerParam, 0, interval);
802 }
803 }
804 }
805 return;
806 }
807 break;
808 case 0x20:
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
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
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
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 }
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
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
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
886 if( (r&0x0f) > 8) return;
887 CH = &OPL->P_CH[r&0x0f];
888 if(!(r&0x10))
889 {
890 block_fnum = (CH->block_fnum&0x1f00) | v;
891 }
892 else
893 {
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
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
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:
938 slot = slot_array[r&0x1f];
939 if(slot == -1) return;
940 CH = &OPL->P_CH[slot/2];
941 if(OPL->wavesel)
942 {
943
944 CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT];
945 }
946 return;
947 }
948}
949
950
951static int OPL_LockTable(void)
952{
953 num_lock++;
954 if(num_lock>1) return 0;
955
956 cur_chip = NULL;
957
958 if( !OPLOpenTable() )
959 {
960 num_lock--;
961 return -1;
962 }
963 return 0;
964}
965
966static void OPL_UnLockTable(void)
967{
968 if(num_lock) num_lock--;
969 if(num_lock) return;
970
971 cur_chip = NULL;
972 OPLCloseTable();
973}
974
975
976
977
978
979
980void 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
993 S_CH = OPL->P_CH;
994 E_CH = &S_CH[9];
995
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
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
1010
1011 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT];
1012 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT];
1013 outd[0] = 0;
1014
1015 for(CH=S_CH ; CH < R_CH ; CH++)
1016 OPL_CALC_CH(CH);
1017
1018 if(rhythm)
1019 OPL_CALC_RH(S_CH);
1020
1021 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
1022
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
1039static void OPLResetChip(FM_OPL *OPL)
1040{
1041 int c,s;
1042 int i;
1043
1044
1045 OPL->mode = 0;
1046 OPL_STATUS_RESET(OPL,0x7f);
1047
1048 OPLWriteReg(OPL,0x01,0);
1049 OPLWriteReg(OPL,0x02,0);
1050 OPLWriteReg(OPL,0x03,0);
1051 OPLWriteReg(OPL,0x04,0);
1052 for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0);
1053
1054 for( c = 0 ; c < OPL->max_ch ; c++ )
1055 {
1056 OPL_CH *CH = &OPL->P_CH[c];
1057
1058 for(s = 0 ; s < 2 ; s++ )
1059 {
1060
1061 CH->SLOT[s].wavetable = &SIN_TABLE[0];
1062
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
1071
1072FM_OPL *OPLCreate(int clock, int rate)
1073{
1074 char *ptr;
1075 FM_OPL *OPL;
1076 int state_size;
1077 int max_ch = 9;
1078
1079 if( OPL_LockTable() ==-1) return NULL;
1080
1081 state_size = sizeof(FM_OPL);
1082 state_size += sizeof(OPL_CH)*max_ch;
1083
1084 ptr = malloc(state_size);
1085 if(ptr==NULL) return NULL;
1086
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
1091 OPL->clock = clock;
1092 OPL->rate = rate;
1093 OPL->max_ch = max_ch;
1094
1095 OPL_initialize(OPL);
1096
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
1120void 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
1134
1135void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler,
1136 void *param)
1137{
1138 OPL->TimerHandler = TimerHandler;
1139 OPL->TimerParam = param;
1140}
1141
1142
1143int OPLWrite(FM_OPL *OPL,int a,int v)
1144{
1145 if( !(a&1) )
1146 {
1147 OPL->address = v & 0xff;
1148 }
1149 else
1150 {
1151#ifdef OPL_OUTPUT_LOG
1152 if(opl_dbg_fp)
1153 {
1154 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
1155 if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
1156 fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v);
1157 }
1158#endif
1159 OPLWriteReg(OPL,OPL->address,v);
1160 }
1161 return OPL->status>>7;
1162}
1163
1164unsigned char OPLRead(FM_OPL *OPL,int a)
1165{
1166 if( !(a&1) )
1167 {
1168 return OPL->status & (OPL->statusmask|0x80);
1169 }
1170
1171 switch(OPL->address)
1172 {
1173 case 0x05:
1174 return 0;
1175#if 0
1176 case 0x0f:
1177 return 0;
1178#endif
1179 case 0x19:
1180 return 0;
1181 case 0x1a:
1182 return 0;
1183 }
1184 return 0;
1185}
1186
1187int OPLTimerOver(FM_OPL *OPL,int c)
1188{
1189 if( c )
1190 {
1191 OPL_STATUS_SET(OPL,0x20);
1192 }
1193 else
1194 {
1195 OPL_STATUS_SET(OPL,0x40);
1196
1197 if( OPL->mode & 0x80 )
1198 {
1199 int ch;
1200 for(ch=0;ch<9;ch++)
1201 CSMKeyControll( &OPL->P_CH[ch] );
1202 }
1203 }
1204
1205 if (OPL->TimerHandler) {
1206 (OPL->TimerHandler)(OPL->TimerParam, c,
1207 (double)OPL->T[c] * OPL->TimerBase);
1208 }
1209 return OPL->status>>7;
1210}
1211