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, write to the Free Software
31 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
32 */
33
34 #if defined(_MSC_VER) && (_MSC_VER < 1900)
35 #define INLINE __inline
36 #else
37 #define INLINE static inline
38 #endif
39 #define HAS_YM3812 1
40
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include <stdarg.h>
45 #include <math.h>
46 //#include "driver.h" /* use M.A.M.E. */
47 #include "fmopl.h"
48
49 #ifndef PI
50 #define PI 3.14159265358979323846
51 #endif
52
53 /* -------------------- for debug --------------------- */
54 /* #define OPL_OUTPUT_LOG */
55 #ifdef OPL_OUTPUT_LOG
56 static FILE *opl_dbg_fp = NULL;
57 static FM_OPL *opl_dbg_opl[16];
58 static int opl_dbg_maxchip,opl_dbg_chip;
59 #endif
60
61 /* -------------------- preliminary define section --------------------- */
62 /* attack/decay rate time rate */
63 #define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */
64 #define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */
65
66 #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */
67
68 #define FREQ_BITS 24 /* frequency turn */
69
70 /* counter bits = 20 , octerve 7 */
71 #define FREQ_RATE (1<<(FREQ_BITS-20))
72 #define TL_BITS (FREQ_BITS+2)
73
74 /* final output shift , limit minimum and maximum */
75 #define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */
76 #define OPL_MAXOUT (0x7fff<<OPL_OUTSB)
77 #define OPL_MINOUT (-(0x8000<<OPL_OUTSB))
78
79 /* -------------------- quality selection --------------------- */
80
81 /* sinwave entries */
82 /* used static memory = SIN_ENT * 4 (byte) */
83 #define SIN_ENT 2048
84
85 /* output level entries (envelope,sinwave) */
86 /* envelope counter lower bits */
87 #define ENV_BITS 16
88 /* envelope output entries */
89 #define EG_ENT 4096
90 /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */
91 /* used static memory = EG_ENT*4 (byte) */
92
93 #define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */
94 #define EG_DED EG_OFF
95 #define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */
96 #define EG_AED EG_DST
97 #define EG_AST 0 /* ATTACK START */
98
99 #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */
100
101 /* LFO table entries */
102 #define VIB_ENT 512
103 #define VIB_SHIFT (32-9)
104 #define AMS_ENT 512
105 #define AMS_SHIFT (32-9)
106
107 #define VIB_RATE 256
108
109 /* -------------------- local defines , macros --------------------- */
110
111 /* register number to channel number , slot offset */
112 #define SLOT1 0
113 #define SLOT2 1
114
115 /* envelope phase */
116 #define ENV_MOD_RR 0x00
117 #define ENV_MOD_DR 0x01
118 #define ENV_MOD_AR 0x02
119
120 /* -------------------- tables --------------------- */
121 static const int slot_array[32]=
122 {
123 0, 2, 4, 1, 3, 5,-1,-1,
124 6, 8,10, 7, 9,11,-1,-1,
125 12,14,16,13,15,17,-1,-1,
126 -1,-1,-1,-1,-1,-1,-1,-1
127 };
128
129 /* key scale level */
130 /* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */
131 #define DV (EG_STEP/2)
132 #define U(x) ((UINT32)(x))
133 static const UINT32 KSL_TABLE[8*16]=
134 {
135 /* OCT 0 */
136 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),
137 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),
138 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),
139 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),
140 /* OCT 1 */
141 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),
142 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),
143 U( 0.000/DV),U( 0.750/DV),U( 1.125/DV),U( 1.500/DV),
144 U( 1.875/DV),U( 2.250/DV),U( 2.625/DV),U( 3.000/DV),
145 /* OCT 2 */
146 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),
147 U( 0.000/DV),U( 1.125/DV),U( 1.875/DV),U( 2.625/DV),
148 U( 3.000/DV),U( 3.750/DV),U( 4.125/DV),U( 4.500/DV),
149 U( 4.875/DV),U( 5.250/DV),U( 5.625/DV),U( 6.000/DV),
150 /* OCT 3 */
151 U( 0.000/DV),U( 0.000/DV),U( 0.000/DV),U( 1.875/DV),
152 U( 3.000/DV),U( 4.125/DV),U( 4.875/DV),U( 5.625/DV),
153 U( 6.000/DV),U( 6.750/DV),U( 7.125/DV),U( 7.500/DV),
154 U( 7.875/DV),U( 8.250/DV),U( 8.625/DV),U( 9.000/DV),
155 /* OCT 4 */
156 U( 0.000/DV),U( 0.000/DV),U( 3.000/DV),U( 4.875/DV),
157 U( 6.000/DV),U( 7.125/DV),U( 7.875/DV),U( 8.625/DV),
158 U( 9.000/DV),U( 9.750/DV),U(10.125/DV),U(10.500/DV),
159 U(10.875/DV),U(11.250/DV),U(11.625/DV),U(12.000/DV),
160 /* OCT 5 */
161 U( 0.000/DV),U( 3.000/DV),U( 6.000/DV),U( 7.875/DV),
162 U( 9.000/DV),U(10.125/DV),U(10.875/DV),U(11.625/DV),
163 U(12.000/DV),U(12.750/DV),U(13.125/DV),U(13.500/DV),
164 U(13.875/DV),U(14.250/DV),U(14.625/DV),U(15.000/DV),
165 /* OCT 6 */
166 U( 0.000/DV),U( 6.000/DV),U( 9.000/DV),U(10.875/DV),
167 U(12.000/DV),U(13.125/DV),U(13.875/DV),U(14.625/DV),
168 U(15.000/DV),U(15.750/DV),U(16.125/DV),U(16.500/DV),
169 U(16.875/DV),U(17.250/DV),U(17.625/DV),U(18.000/DV),
170 /* OCT 7 */
171 U( 0.000/DV),U( 9.000/DV),U(12.000/DV),U(13.875/DV),
172 U(15.000/DV),U(16.125/DV),U(16.875/DV),U(17.625/DV),
173 U(18.000/DV),U(18.750/DV),U(19.125/DV),U(19.500/DV),
174 U(19.875/DV),U(20.250/DV),U(20.625/DV),U(21.000/DV)
175 };
176 #undef U
177 #undef DV
178
179 /* sustain lebel table (3db per step) */
180 /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/
181 #define SC(db) (INT32)((db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST)
182 static const INT32 SL_TABLE[16]={
183 SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7),
184 SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31)
185 };
186 #undef SC
187
188 #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */
189 /* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */
190 /* TL_TABLE[ 0 to TL_MAX ] : plus section */
191 /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */
192 static INT32 *TL_TABLE;
193
194 /* pointers to TL_TABLE with sinwave output offset */
195 static INT32 **SIN_TABLE;
196
197 /* LFO table */
198 static INT32 *AMS_TABLE;
199 static INT32 *VIB_TABLE;
200
201 /* envelope output curve table */
202 /* attack + decay + OFF */
203 static INT32 ENV_CURVE[2*EG_ENT+1];
204
205 /* multiple table */
206 #define ML 2
207 static const UINT32 MUL_TABLE[16]= {
208 /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */
209 ML/2, 1*ML, 2*ML, 3*ML, 4*ML, 5*ML, 6*ML, 7*ML,
210 8*ML, 9*ML,10*ML,10*ML,12*ML,12*ML,15*ML,15*ML
211 };
212 #undef ML
213
214 /* dummy attack / decay rate ( when rate == 0 ) */
215 static INT32 RATE_0[16]=
216 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
217
218 /* -------------------- static state --------------------- */
219
220 /* lock level of common table */
221 static int num_lock = 0;
222
223 /* work table */
224 static void *cur_chip = NULL; /* current chip point */
225 /* currenct chip state */
226 /* static OPLSAMPLE *bufL,*bufR; */
227 static OPL_CH *S_CH;
228 static OPL_CH *E_CH;
229 OPL_SLOT *SLOT7_1,*SLOT7_2,*SLOT8_1,*SLOT8_2;
230
231 static INT32 outd[1];
232 static INT32 ams;
233 static INT32 vib;
234 INT32 *ams_table;
235 INT32 *vib_table;
236 static INT32 amsIncr;
237 static INT32 vibIncr;
238 static INT32 feedback2; /* connect for SLOT 2 */
239
240 /* log output level */
241 #define LOG_ERR 3 /* ERROR */
242 #define LOG_WAR 2 /* WARNING */
243 #define LOG_INF 1 /* INFORMATION */
244
245 //#define LOG_LEVEL LOG_INF
246 #define LOG_LEVEL LOG_ERR
247
248 //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x
249 #define LOG(n,x)
250
251 /* --------------------- subroutines --------------------- */
252
Limit(int val,int max,int min)253 INLINE int Limit( int val, int max, int min ) {
254 if ( val > max )
255 val = max;
256 else if ( val < min )
257 val = min;
258
259 return val;
260 }
261
262 /* status set and IRQ handling */
OPL_STATUS_SET(FM_OPL * OPL,int flag)263 INLINE void OPL_STATUS_SET(FM_OPL *OPL,int flag)
264 {
265 /* set status flag */
266 OPL->status |= flag;
267 if(!(OPL->status & 0x80))
268 {
269 if(OPL->status & OPL->statusmask)
270 { /* IRQ on */
271 OPL->status |= 0x80;
272 /* callback user interrupt handler (IRQ is OFF to ON) */
273 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,1);
274 }
275 }
276 }
277
278 /* status reset and IRQ handling */
OPL_STATUS_RESET(FM_OPL * OPL,int flag)279 INLINE void OPL_STATUS_RESET(FM_OPL *OPL,int flag)
280 {
281 /* reset status flag */
282 OPL->status &=~flag;
283 if((OPL->status & 0x80))
284 {
285 if (!(OPL->status & OPL->statusmask) )
286 {
287 OPL->status &= 0x7f;
288 /* callback user interrupt handler (IRQ is ON to OFF) */
289 if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0);
290 }
291 }
292 }
293
294 /* IRQ mask set */
OPL_STATUSMASK_SET(FM_OPL * OPL,int flag)295 INLINE void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag)
296 {
297 OPL->statusmask = flag;
298 /* IRQ handling check */
299 OPL_STATUS_SET(OPL,0);
300 OPL_STATUS_RESET(OPL,0);
301 }
302
303 /* ----- key on ----- */
OPL_KEYON(OPL_SLOT * SLOT)304 INLINE void OPL_KEYON(OPL_SLOT *SLOT)
305 {
306 /* sin wave restart */
307 SLOT->Cnt = 0;
308 /* set attack */
309 SLOT->evm = ENV_MOD_AR;
310 SLOT->evs = SLOT->evsa;
311 SLOT->evc = EG_AST;
312 SLOT->eve = EG_AED;
313 }
314 /* ----- key off ----- */
OPL_KEYOFF(OPL_SLOT * SLOT)315 INLINE void OPL_KEYOFF(OPL_SLOT *SLOT)
316 {
317 if( SLOT->evm > ENV_MOD_RR)
318 {
319 /* set envelope counter from envleope output */
320 SLOT->evm = ENV_MOD_RR;
321 if( !(SLOT->evc&EG_DST) )
322 //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST;
323 SLOT->evc = EG_DST;
324 SLOT->eve = EG_DED;
325 SLOT->evs = SLOT->evsr;
326 }
327 }
328
329 /* ---------- calcrate Envelope Generator & Phase Generator ---------- */
330 /* return : envelope output */
OPL_CALC_SLOT(OPL_SLOT * SLOT)331 INLINE UINT32 OPL_CALC_SLOT( OPL_SLOT *SLOT )
332 {
333 /* calcrate envelope generator */
334 if( (SLOT->evc+=SLOT->evs) >= SLOT->eve )
335 {
336 switch( SLOT->evm ){
337 case ENV_MOD_AR: /* ATTACK -> DECAY1 */
338 /* next DR */
339 SLOT->evm = ENV_MOD_DR;
340 SLOT->evc = EG_DST;
341 SLOT->eve = SLOT->SL;
342 SLOT->evs = SLOT->evsd;
343 break;
344 case ENV_MOD_DR: /* DECAY -> SL or RR */
345 SLOT->evc = SLOT->SL;
346 SLOT->eve = EG_DED;
347 if(SLOT->eg_typ)
348 {
349 SLOT->evs = 0;
350 }
351 else
352 {
353 SLOT->evm = ENV_MOD_RR;
354 SLOT->evs = SLOT->evsr;
355 }
356 break;
357 case ENV_MOD_RR: /* RR -> OFF */
358 SLOT->evc = EG_OFF;
359 SLOT->eve = EG_OFF+1;
360 SLOT->evs = 0;
361 break;
362 }
363 }
364 /* calcrate envelope */
365 return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0);
366 }
367
368 /* set algorythm connection */
set_algorythm(OPL_CH * CH)369 static void set_algorythm( OPL_CH *CH)
370 {
371 INT32 *carrier = &outd[0];
372 CH->connect1 = CH->CON ? carrier : &feedback2;
373 CH->connect2 = carrier;
374 }
375
376 /* ---------- frequency counter for operater update ---------- */
CALC_FCSLOT(OPL_CH * CH,OPL_SLOT * SLOT)377 INLINE void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT)
378 {
379 int ksr;
380
381 /* frequency step counter */
382 SLOT->Incr = CH->fc * SLOT->mul;
383 ksr = CH->kcode >> SLOT->KSR;
384
385 if( SLOT->ksr != ksr )
386 {
387 SLOT->ksr = ksr;
388 /* attack , decay rate recalcration */
389 SLOT->evsa = SLOT->AR[ksr];
390 SLOT->evsd = SLOT->DR[ksr];
391 SLOT->evsr = SLOT->RR[ksr];
392 }
393 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
394 }
395
396 /* set multi,am,vib,EG-TYP,KSR,mul */
set_mul(FM_OPL * OPL,int slot,int v)397 INLINE void set_mul(FM_OPL *OPL,int slot,int v)
398 {
399 OPL_CH *CH = &OPL->P_CH[slot/2];
400 OPL_SLOT *SLOT = &CH->SLOT[slot&1];
401
402 SLOT->mul = MUL_TABLE[v&0x0f];
403 SLOT->KSR = (v&0x10) ? 0 : 2;
404 SLOT->eg_typ = (v&0x20)>>5;
405 SLOT->vib = (v&0x40);
406 SLOT->ams = (v&0x80);
407 CALC_FCSLOT(CH,SLOT);
408 }
409
410 /* set ksl & tl */
set_ksl_tl(FM_OPL * OPL,int slot,int v)411 INLINE void set_ksl_tl(FM_OPL *OPL,int slot,int v)
412 {
413 OPL_CH *CH = &OPL->P_CH[slot/2];
414 OPL_SLOT *SLOT = &CH->SLOT[slot&1];
415 int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */
416
417 SLOT->ksl = ksl ? 3-ksl : 31;
418 SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */
419
420 if( !(OPL->mode&0x80) )
421 { /* not CSM latch total level */
422 SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
423 }
424 }
425
426 /* set attack rate & decay rate */
set_ar_dr(FM_OPL * OPL,int slot,int v)427 INLINE void set_ar_dr(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 ar = v>>4;
432 int dr = v&0x0f;
433
434 SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0;
435 SLOT->evsa = SLOT->AR[SLOT->ksr];
436 if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa;
437
438 SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0;
439 SLOT->evsd = SLOT->DR[SLOT->ksr];
440 if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd;
441 }
442
443 /* set sustain level & release rate */
set_sl_rr(FM_OPL * OPL,int slot,int v)444 INLINE void set_sl_rr(FM_OPL *OPL,int slot,int v)
445 {
446 OPL_CH *CH = &OPL->P_CH[slot/2];
447 OPL_SLOT *SLOT = &CH->SLOT[slot&1];
448 int sl = v>>4;
449 int rr = v & 0x0f;
450
451 SLOT->SL = SL_TABLE[sl];
452 if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL;
453 SLOT->RR = &OPL->DR_TABLE[rr<<2];
454 SLOT->evsr = SLOT->RR[SLOT->ksr];
455 if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr;
456 }
457
458 /* operator output calcrator */
459 #define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env]
460 /* ---------- calcrate one of channel ---------- */
OPL_CALC_CH(OPL_CH * CH)461 INLINE void OPL_CALC_CH( OPL_CH *CH )
462 {
463 UINT32 env_out;
464 OPL_SLOT *SLOT;
465
466 feedback2 = 0;
467 /* SLOT 1 */
468 SLOT = &CH->SLOT[SLOT1];
469 env_out=OPL_CALC_SLOT(SLOT);
470 if( env_out < EG_ENT-1 )
471 {
472 /* PG */
473 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
474 else SLOT->Cnt += SLOT->Incr;
475 /* connectoion */
476 if(CH->FB)
477 {
478 int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB;
479 CH->op1_out[1] = CH->op1_out[0];
480 *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
481 }
482 else
483 {
484 *CH->connect1 += OP_OUT(SLOT,env_out,0);
485 }
486 }else
487 {
488 CH->op1_out[1] = CH->op1_out[0];
489 CH->op1_out[0] = 0;
490 }
491 /* SLOT 2 */
492 SLOT = &CH->SLOT[SLOT2];
493 env_out=OPL_CALC_SLOT(SLOT);
494 if( env_out < EG_ENT-1 )
495 {
496 /* PG */
497 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
498 else SLOT->Cnt += SLOT->Incr;
499 /* connectoion */
500 outd[0] += OP_OUT(SLOT,env_out, feedback2);
501 }
502 }
503
504 /* ---------- calcrate rythm block ---------- */
505 #define WHITE_NOISE_db 6.0
OPL_CALC_RH(OPL_CH * CH)506 INLINE void OPL_CALC_RH( OPL_CH *CH )
507 {
508 UINT32 env_tam,env_sd,env_top,env_hh;
509 int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP);
510 INT32 tone8;
511
512 OPL_SLOT *SLOT;
513 int env_out;
514
515 /* BD : same as FM serial mode and output level is large */
516 feedback2 = 0;
517 /* SLOT 1 */
518 SLOT = &CH[6].SLOT[SLOT1];
519 env_out=OPL_CALC_SLOT(SLOT);
520 if( env_out < EG_ENT-1 )
521 {
522 /* PG */
523 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
524 else SLOT->Cnt += SLOT->Incr;
525 /* connectoion */
526 if(CH[6].FB)
527 {
528 int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB;
529 CH[6].op1_out[1] = CH[6].op1_out[0];
530 feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1);
531 }
532 else
533 {
534 feedback2 = OP_OUT(SLOT,env_out,0);
535 }
536 }else
537 {
538 feedback2 = 0;
539 CH[6].op1_out[1] = CH[6].op1_out[0];
540 CH[6].op1_out[0] = 0;
541 }
542 /* SLOT 2 */
543 SLOT = &CH[6].SLOT[SLOT2];
544 env_out=OPL_CALC_SLOT(SLOT);
545 if( env_out < EG_ENT-1 )
546 {
547 /* PG */
548 if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE);
549 else SLOT->Cnt += SLOT->Incr;
550 /* connectoion */
551 outd[0] += OP_OUT(SLOT,env_out, feedback2)*2;
552 }
553
554 // SD (17) = mul14[fnum7] + white noise
555 // TAM (15) = mul15[fnum8]
556 // TOP (18) = fnum6(mul18[fnum8]+whitenoise)
557 // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise
558 env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise;
559 env_tam=OPL_CALC_SLOT(SLOT8_1);
560 env_top=OPL_CALC_SLOT(SLOT8_2);
561 env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise;
562
563 /* PG */
564 if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE);
565 else SLOT7_1->Cnt += 2*SLOT7_1->Incr;
566 if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE);
567 else SLOT7_2->Cnt += (CH[7].fc*8);
568 if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE);
569 else SLOT8_1->Cnt += SLOT8_1->Incr;
570 if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE);
571 else SLOT8_2->Cnt += (CH[8].fc*48);
572
573 tone8 = OP_OUT(SLOT8_2,whitenoise,0 );
574
575 /* SD */
576 if( env_sd < EG_ENT-1 )
577 outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8;
578 /* TAM */
579 if( env_tam < EG_ENT-1 )
580 outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2;
581 /* TOP-CY */
582 if( env_top < EG_ENT-1 )
583 outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2;
584 /* HH */
585 if( env_hh < EG_ENT-1 )
586 outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2;
587 }
588
589 /* ----------- initialize time tabls ----------- */
init_timetables(FM_OPL * OPL,int ARRATE,int DRRATE)590 static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE )
591 {
592 int i;
593 double rate;
594
595 /* make attack rate & decay rate tables */
596 for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0;
597 for (i = 4;i <= 60;i++){
598 rate = OPL->freqbase; /* frequency rate */
599 if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */
600 rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */
601 rate *= (double)(EG_ENT<<ENV_BITS);
602 OPL->AR_TABLE[i] = rate / ARRATE;
603 OPL->DR_TABLE[i] = rate / DRRATE;
604 }
605 for (i = 60;i < 75;i++)
606 {
607 OPL->AR_TABLE[i] = EG_AED-1;
608 OPL->DR_TABLE[i] = OPL->DR_TABLE[60];
609 }
610 #if 0
611 for (i = 0;i < 64 ;i++){ /* make for overflow area */
612 LOG(LOG_WAR,("rate %2d , ar %f ms , dr %f ms \n",i,
613 ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate),
614 ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) ));
615 }
616 #endif
617 }
618
619 /* ---------- generic table initialize ---------- */
OPLOpenTable(void)620 static int OPLOpenTable( void )
621 {
622 int s,t;
623 double rate;
624 int i,j;
625 double pom;
626
627 /* allocate dynamic tables */
628 if( (TL_TABLE = malloc(TL_MAX*2*sizeof(INT32))) == NULL)
629 return 0;
630 if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(INT32 *))) == NULL)
631 {
632 free(TL_TABLE);
633 return 0;
634 }
635 if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(INT32))) == NULL)
636 {
637 free(TL_TABLE);
638 free(SIN_TABLE);
639 return 0;
640 }
641 if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(INT32))) == NULL)
642 {
643 free(TL_TABLE);
644 free(SIN_TABLE);
645 free(AMS_TABLE);
646 return 0;
647 }
648 /* make total level table */
649 for (t = 0;t < EG_ENT-1 ;t++){
650 rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */
651 TL_TABLE[ t] = (int)rate;
652 TL_TABLE[TL_MAX+t] = -TL_TABLE[t];
653 /* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/
654 }
655 /* fill volume off area */
656 for ( t = EG_ENT-1; t < TL_MAX ;t++){
657 TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0;
658 }
659
660 /* make sinwave table (total level offet) */
661 /* degree 0 = degree 180 = off */
662 SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1];
663 for (s = 1;s <= SIN_ENT/4;s++){
664 pom = sin(2*PI*s/SIN_ENT); /* sin */
665 pom = 20*log10(1/pom); /* decibel */
666 j = pom / EG_STEP; /* TL_TABLE steps */
667
668 /* degree 0 - 90 , degree 180 - 90 : plus section */
669 SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j];
670 /* degree 180 - 270 , degree 360 - 270 : minus section */
671 SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j];
672 /* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/
673 }
674 for (s = 0;s < SIN_ENT;s++)
675 {
676 SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT];
677 SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)];
678 SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s];
679 }
680
681 /* envelope counter -> envelope output table */
682 for (i=0; i<EG_ENT; i++)
683 {
684 /* ATTACK curve */
685 pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT;
686 /* if( pom >= EG_ENT ) pom = EG_ENT-1; */
687 ENV_CURVE[i] = (int)pom;
688 /* DECAY ,RELEASE curve */
689 ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i;
690 }
691 /* off */
692 ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1;
693 /* make LFO ams table */
694 for (i=0; i<AMS_ENT; i++)
695 {
696 pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */
697 AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */
698 AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */
699 }
700 /* make LFO vibrate table */
701 for (i=0; i<VIB_ENT; i++)
702 {
703 /* 100cent = 1seminote = 6% ?? */
704 pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */
705 VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */
706 VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */
707 /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */
708 }
709 return 1;
710 }
711
712
OPLCloseTable(void)713 static void OPLCloseTable( void )
714 {
715 free(TL_TABLE);
716 free(SIN_TABLE);
717 free(AMS_TABLE);
718 free(VIB_TABLE);
719 }
720
721 /* CSM Key Controll */
CSMKeyControll(OPL_CH * CH)722 INLINE void CSMKeyControll(OPL_CH *CH)
723 {
724 OPL_SLOT *slot1 = &CH->SLOT[SLOT1];
725 OPL_SLOT *slot2 = &CH->SLOT[SLOT2];
726 /* all key off */
727 OPL_KEYOFF(slot1);
728 OPL_KEYOFF(slot2);
729 /* total level latch */
730 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
731 slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
732 /* key on */
733 CH->op1_out[0] = CH->op1_out[1] = 0;
734 OPL_KEYON(slot1);
735 OPL_KEYON(slot2);
736 }
737
738 /* ---------- opl initialize ---------- */
OPL_initalize(FM_OPL * OPL)739 static void OPL_initalize(FM_OPL *OPL)
740 {
741 int fn;
742
743 /* frequency base */
744 OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0;
745 /* Timer base time */
746 OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 );
747 /* make time tables */
748 init_timetables( OPL , OPL_ARRATE , OPL_DRRATE );
749 /* make fnumber -> increment counter table */
750 for( fn=0 ; fn < 1024 ; fn++ )
751 {
752 OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2;
753 }
754 /* LFO freq.table */
755 OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0;
756 OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0;
757 }
758
759 /* ---------- write a OPL registers ---------- */
OPLWriteReg(FM_OPL * OPL,int r,int v)760 static void OPLWriteReg(FM_OPL *OPL, int r, int v)
761 {
762 OPL_CH *CH;
763 int slot;
764 int block_fnum;
765
766 switch(r&0xe0)
767 {
768 case 0x00: /* 00-1f:controll */
769 switch(r&0x1f)
770 {
771 case 0x01:
772 /* wave selector enable */
773 if(OPL->type&OPL_TYPE_WAVESEL)
774 {
775 OPL->wavesel = v&0x20;
776 if(!OPL->wavesel)
777 {
778 /* preset compatible mode */
779 int c;
780 for(c=0;c<OPL->max_ch;c++)
781 {
782 OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
783 OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
784 }
785 }
786 }
787 return;
788 case 0x02: /* Timer 1 */
789 OPL->T[0] = (256-v)*4;
790 break;
791 case 0x03: /* Timer 2 */
792 OPL->T[1] = (256-v)*16;
793 return;
794 case 0x04: /* IRQ clear / mask and Timer enable */
795 if(v&0x80)
796 { /* IRQ flag clear */
797 OPL_STATUS_RESET(OPL,0x7f);
798 }
799 else
800 { /* set IRQ mask ,timer enable*/
801 UINT8 st1 = v&1;
802 UINT8 st2 = (v>>1)&1;
803 /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */
804 OPL_STATUS_RESET(OPL,v&0x78);
805 OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01);
806 /* timer 2 */
807 if(OPL->st[1] != st2)
808 {
809 double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0;
810 OPL->st[1] = st2;
811 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+1,interval);
812 }
813 /* timer 1 */
814 if(OPL->st[0] != st1)
815 {
816 double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0;
817 OPL->st[0] = st1;
818 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+0,interval);
819 }
820 }
821 return;
822 #if BUILD_Y8950
823 case 0x06: /* Key Board OUT */
824 if(OPL->type&OPL_TYPE_KEYBOARD)
825 {
826 if(OPL->keyboardhandler_w)
827 OPL->keyboardhandler_w(OPL->keyboard_param,v);
828 else
829 LOG(LOG_WAR,("OPL:write unmapped KEYBOARD port\n"));
830 }
831 return;
832 case 0x07: /* DELTA-T controll : START,REC,MEMDATA,REPT,SPOFF,x,x,RST */
833 if(OPL->type&OPL_TYPE_ADPCM)
834 YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v);
835 return;
836 case 0x08: /* MODE,DELTA-T : CSM,NOTESEL,x,x,smpl,da/ad,64k,rom */
837 OPL->mode = v;
838 v&=0x1f; /* for DELTA-T unit */
839 case 0x09: /* START ADD */
840 case 0x0a:
841 case 0x0b: /* STOP ADD */
842 case 0x0c:
843 case 0x0d: /* PRESCALE */
844 case 0x0e:
845 case 0x0f: /* ADPCM data */
846 case 0x10: /* DELTA-N */
847 case 0x11: /* DELTA-N */
848 case 0x12: /* EG-CTRL */
849 if(OPL->type&OPL_TYPE_ADPCM)
850 YM_DELTAT_ADPCM_Write(OPL->deltat,r-0x07,v);
851 return;
852 #if 0
853 case 0x15: /* DAC data */
854 case 0x16:
855 case 0x17: /* SHIFT */
856 return;
857 case 0x18: /* I/O CTRL (Direction) */
858 if(OPL->type&OPL_TYPE_IO)
859 OPL->portDirection = v&0x0f;
860 return;
861 case 0x19: /* I/O DATA */
862 if(OPL->type&OPL_TYPE_IO)
863 {
864 OPL->portLatch = v;
865 if(OPL->porthandler_w)
866 OPL->porthandler_w(OPL->port_param,v&OPL->portDirection);
867 }
868 return;
869 case 0x1a: /* PCM data */
870 return;
871 #endif
872 #endif
873 }
874 break;
875 case 0x20: /* am,vib,ksr,eg type,mul */
876 slot = slot_array[r&0x1f];
877 if(slot == -1) return;
878 set_mul(OPL,slot,v);
879 return;
880 case 0x40:
881 slot = slot_array[r&0x1f];
882 if(slot == -1) return;
883 set_ksl_tl(OPL,slot,v);
884 return;
885 case 0x60:
886 slot = slot_array[r&0x1f];
887 if(slot == -1) return;
888 set_ar_dr(OPL,slot,v);
889 return;
890 case 0x80:
891 slot = slot_array[r&0x1f];
892 if(slot == -1) return;
893 set_sl_rr(OPL,slot,v);
894 return;
895 case 0xa0:
896 switch(r)
897 {
898 case 0xbd:
899 /* amsep,vibdep,r,bd,sd,tom,tc,hh */
900 {
901 UINT8 rkey = OPL->rythm^v;
902 OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0];
903 OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0];
904 OPL->rythm = v&0x3f;
905 if(OPL->rythm&0x20)
906 {
907 #if 0
908 usrintf_showmessage("OPL Rythm mode select");
909 #endif
910 /* BD key on/off */
911 if(rkey&0x10)
912 {
913 if(v&0x10)
914 {
915 OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0;
916 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]);
917 OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]);
918 }
919 else
920 {
921 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]);
922 OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]);
923 }
924 }
925 /* SD key on/off */
926 if(rkey&0x08)
927 {
928 if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]);
929 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]);
930 }/* TAM key on/off */
931 if(rkey&0x04)
932 {
933 if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]);
934 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]);
935 }
936 /* TOP-CY key on/off */
937 if(rkey&0x02)
938 {
939 if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]);
940 else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]);
941 }
942 /* HH key on/off */
943 if(rkey&0x01)
944 {
945 if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]);
946 else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]);
947 }
948 }
949 }
950 return;
951 }
952 /* keyon,block,fnum */
953 if( (r&0x0f) > 8) return;
954 CH = &OPL->P_CH[r&0x0f];
955 if(!(r&0x10))
956 { /* a0-a8 */
957 block_fnum = (CH->block_fnum&0x1f00) | v;
958 }
959 else
960 { /* b0-b8 */
961 int keyon = (v>>5)&1;
962 block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff);
963 if(CH->keyon != keyon)
964 {
965 if( (CH->keyon=keyon) )
966 {
967 CH->op1_out[0] = CH->op1_out[1] = 0;
968 OPL_KEYON(&CH->SLOT[SLOT1]);
969 OPL_KEYON(&CH->SLOT[SLOT2]);
970 }
971 else
972 {
973 OPL_KEYOFF(&CH->SLOT[SLOT1]);
974 OPL_KEYOFF(&CH->SLOT[SLOT2]);
975 }
976 }
977 }
978 /* update */
979 if((int)CH->block_fnum != block_fnum)
980 {
981 int blockRv = 7-(block_fnum>>10);
982 int fnum = block_fnum&0x3ff;
983 CH->block_fnum = block_fnum;
984
985 CH->ksl_base = KSL_TABLE[block_fnum>>6];
986 CH->fc = OPL->FN_TABLE[fnum]>>blockRv;
987 CH->kcode = CH->block_fnum>>9;
988 if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1;
989 CALC_FCSLOT(CH,&CH->SLOT[SLOT1]);
990 CALC_FCSLOT(CH,&CH->SLOT[SLOT2]);
991 }
992 return;
993 case 0xc0:
994 /* FB,C */
995 if( (r&0x0f) > 8) return;
996 CH = &OPL->P_CH[r&0x0f];
997 {
998 int feedback = (v>>1)&7;
999 CH->FB = feedback ? (8+1) - feedback : 0;
1000 CH->CON = v&1;
1001 set_algorythm(CH);
1002 }
1003 return;
1004 case 0xe0: /* wave type */
1005 slot = slot_array[r&0x1f];
1006 if(slot == -1) return;
1007 CH = &OPL->P_CH[slot/2];
1008 if(OPL->wavesel)
1009 {
1010 /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */
1011 CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT];
1012 }
1013 return;
1014 }
1015 }
1016
1017 /* lock/unlock for common table */
OPL_LockTable(void)1018 static int OPL_LockTable(void)
1019 {
1020 num_lock++;
1021 if(num_lock>1) return 0;
1022 /* first time */
1023 cur_chip = NULL;
1024 /* allocate total level table (128kb space) */
1025 if( !OPLOpenTable() )
1026 {
1027 num_lock--;
1028 return -1;
1029 }
1030 return 0;
1031 }
1032
OPL_UnLockTable(void)1033 static void OPL_UnLockTable(void)
1034 {
1035 if(num_lock) num_lock--;
1036 if(num_lock) return;
1037 /* last time */
1038 cur_chip = NULL;
1039 OPLCloseTable();
1040 }
1041
1042 #if (BUILD_YM3812 || BUILD_YM3526)
1043 /*******************************************************************************/
1044 /* YM3812 local section */
1045 /*******************************************************************************/
1046
1047 /* ---------- update one of chip ----------- */
YM3812UpdateOne(FM_OPL * OPL,INT16 * buffer,int length)1048 void YM3812UpdateOne(FM_OPL *OPL, INT16 *buffer, int length)
1049 {
1050 int i;
1051 int data;
1052 OPLSAMPLE *buf = buffer;
1053 UINT32 amsCnt = OPL->amsCnt;
1054 UINT32 vibCnt = OPL->vibCnt;
1055 UINT8 rythm = OPL->rythm&0x20;
1056 OPL_CH *CH,*R_CH;
1057
1058 if( (void *)OPL != cur_chip ){
1059 cur_chip = (void *)OPL;
1060 /* channel pointers */
1061 S_CH = OPL->P_CH;
1062 E_CH = &S_CH[9];
1063 /* rythm slot */
1064 SLOT7_1 = &S_CH[7].SLOT[SLOT1];
1065 SLOT7_2 = &S_CH[7].SLOT[SLOT2];
1066 SLOT8_1 = &S_CH[8].SLOT[SLOT1];
1067 SLOT8_2 = &S_CH[8].SLOT[SLOT2];
1068 /* LFO state */
1069 amsIncr = OPL->amsIncr;
1070 vibIncr = OPL->vibIncr;
1071 ams_table = OPL->ams_table;
1072 vib_table = OPL->vib_table;
1073 }
1074 R_CH = rythm ? &S_CH[6] : E_CH;
1075 for( i=0; i < length ; i++ )
1076 {
1077 /* channel A channel B channel C */
1078 /* LFO */
1079 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT];
1080 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT];
1081 outd[0] = 0;
1082 /* FM part */
1083 for(CH=S_CH ; CH < R_CH ; CH++)
1084 OPL_CALC_CH(CH);
1085 /* Rythn part */
1086 if(rythm)
1087 OPL_CALC_RH(S_CH);
1088 /* limit check */
1089 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
1090 /* store to sound buffer */
1091 buf[i] = data >> OPL_OUTSB;
1092 }
1093
1094 OPL->amsCnt = amsCnt;
1095 OPL->vibCnt = vibCnt;
1096 #ifdef OPL_OUTPUT_LOG
1097 if(opl_dbg_fp)
1098 {
1099 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
1100 if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
1101 fprintf(opl_dbg_fp,"%c%c%c",0x20+opl_dbg_chip,length&0xff,length/256);
1102 }
1103 #endif
1104 }
1105 #endif /* (BUILD_YM3812 || BUILD_YM3526) */
1106
1107 #if BUILD_Y8950
1108
Y8950UpdateOne(FM_OPL * OPL,INT16 * buffer,int length)1109 void Y8950UpdateOne(FM_OPL *OPL, INT16 *buffer, int length)
1110 {
1111 int i;
1112 int data;
1113 OPLSAMPLE *buf = buffer;
1114 UINT32 amsCnt = OPL->amsCnt;
1115 UINT32 vibCnt = OPL->vibCnt;
1116 UINT8 rythm = OPL->rythm&0x20;
1117 OPL_CH *CH,*R_CH;
1118 YM_DELTAT *DELTAT = OPL->deltat;
1119
1120 /* setup DELTA-T unit */
1121 YM_DELTAT_DECODE_PRESET(DELTAT);
1122
1123 if( (void *)OPL != cur_chip ){
1124 cur_chip = (void *)OPL;
1125 /* channel pointers */
1126 S_CH = OPL->P_CH;
1127 E_CH = &S_CH[9];
1128 /* rythm slot */
1129 SLOT7_1 = &S_CH[7].SLOT[SLOT1];
1130 SLOT7_2 = &S_CH[7].SLOT[SLOT2];
1131 SLOT8_1 = &S_CH[8].SLOT[SLOT1];
1132 SLOT8_2 = &S_CH[8].SLOT[SLOT2];
1133 /* LFO state */
1134 amsIncr = OPL->amsIncr;
1135 vibIncr = OPL->vibIncr;
1136 ams_table = OPL->ams_table;
1137 vib_table = OPL->vib_table;
1138 }
1139 R_CH = rythm ? &S_CH[6] : E_CH;
1140 for( i=0; i < length ; i++ )
1141 {
1142 /* channel A channel B channel C */
1143 /* LFO */
1144 ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT];
1145 vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT];
1146 outd[0] = 0;
1147 /* deltaT ADPCM */
1148 if( DELTAT->portstate )
1149 YM_DELTAT_ADPCM_CALC(DELTAT);
1150 /* FM part */
1151 for(CH=S_CH ; CH < R_CH ; CH++)
1152 OPL_CALC_CH(CH);
1153 /* Rythn part */
1154 if(rythm)
1155 OPL_CALC_RH(S_CH);
1156 /* limit check */
1157 data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT );
1158 /* store to sound buffer */
1159 buf[i] = data >> OPL_OUTSB;
1160 }
1161 OPL->amsCnt = amsCnt;
1162 OPL->vibCnt = vibCnt;
1163 /* deltaT START flag */
1164 if( !DELTAT->portstate )
1165 OPL->status &= 0xfe;
1166 }
1167 #endif
1168
1169 /* ---------- reset one of chip ---------- */
OPLResetChip(FM_OPL * OPL)1170 void OPLResetChip(FM_OPL *OPL)
1171 {
1172 int c,s;
1173 int i;
1174
1175 /* reset chip */
1176 OPL->mode = 0; /* normal mode */
1177 OPL_STATUS_RESET(OPL,0x7f);
1178 /* reset with register write */
1179 OPLWriteReg(OPL,0x01,0); /* wabesel disable */
1180 OPLWriteReg(OPL,0x02,0); /* Timer1 */
1181 OPLWriteReg(OPL,0x03,0); /* Timer2 */
1182 OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */
1183 for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0);
1184 /* reset OPerator paramater */
1185 for( c = 0 ; c < OPL->max_ch ; c++ )
1186 {
1187 OPL_CH *CH = &OPL->P_CH[c];
1188 /* OPL->P_CH[c].PAN = OPN_CENTER; */
1189 for(s = 0 ; s < 2 ; s++ )
1190 {
1191 /* wave table */
1192 CH->SLOT[s].wavetable = &SIN_TABLE[0];
1193 /* CH->SLOT[s].evm = ENV_MOD_RR; */
1194 CH->SLOT[s].evc = EG_OFF;
1195 CH->SLOT[s].eve = EG_OFF+1;
1196 CH->SLOT[s].evs = 0;
1197 }
1198 }
1199 #if BUILD_Y8950
1200 if(OPL->type&OPL_TYPE_ADPCM)
1201 {
1202 YM_DELTAT *DELTAT = OPL->deltat;
1203
1204 DELTAT->freqbase = OPL->freqbase;
1205 DELTAT->output_pointer = outd;
1206 DELTAT->portshift = 5;
1207 DELTAT->output_range = DELTAT_MIXING_LEVEL<<TL_BITS;
1208 YM_DELTAT_ADPCM_Reset(DELTAT,0);
1209 }
1210 #endif
1211 }
1212
1213 /* ---------- Create one of vietual YM3812 ---------- */
1214 /* 'rate' is sampling rate and 'bufsiz' is the size of the */
OPLCreate(int type,int clock,int rate)1215 FM_OPL *OPLCreate(int type, int clock, int rate)
1216 {
1217 char *ptr;
1218 FM_OPL *OPL;
1219 int state_size;
1220 int max_ch = 9; /* normaly 9 channels */
1221
1222 if( OPL_LockTable() ==-1) return NULL;
1223 /* allocate OPL state space */
1224 state_size = sizeof(FM_OPL);
1225 state_size += sizeof(OPL_CH)*max_ch;
1226 #if BUILD_Y8950
1227 if(type&OPL_TYPE_ADPCM) state_size+= sizeof(YM_DELTAT);
1228 #endif
1229 /* allocate memory block */
1230 ptr = malloc(state_size);
1231 if(ptr==NULL) return NULL;
1232 /* clear */
1233 memset(ptr,0,state_size);
1234 OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL);
1235 OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch;
1236 #if BUILD_Y8950
1237 if(type&OPL_TYPE_ADPCM) OPL->deltat = (YM_DELTAT *)ptr; ptr+=sizeof(YM_DELTAT);
1238 #endif
1239 /* set channel state pointer */
1240 OPL->type = type;
1241 OPL->clock = clock;
1242 OPL->rate = rate;
1243 OPL->max_ch = max_ch;
1244 /* init grobal tables */
1245 OPL_initalize(OPL);
1246 /* reset chip */
1247 OPLResetChip(OPL);
1248 #ifdef OPL_OUTPUT_LOG
1249 if(!opl_dbg_fp)
1250 {
1251 opl_dbg_fp = fopen("opllog.opl","wb");
1252 opl_dbg_maxchip = 0;
1253 }
1254 if(opl_dbg_fp)
1255 {
1256 opl_dbg_opl[opl_dbg_maxchip] = OPL;
1257 fprintf(opl_dbg_fp,"%c%c%c%c%c%c",0x00+opl_dbg_maxchip,
1258 type,
1259 clock&0xff,
1260 (clock/0x100)&0xff,
1261 (clock/0x10000)&0xff,
1262 (clock/0x1000000)&0xff);
1263 opl_dbg_maxchip++;
1264 }
1265 #endif
1266 return OPL;
1267 }
1268
1269 /* ---------- Destroy one of vietual YM3812 ---------- */
OPLDestroy(FM_OPL * OPL)1270 void OPLDestroy(FM_OPL *OPL)
1271 {
1272 if(!OPL)
1273 {
1274 return;
1275 }
1276 #ifdef OPL_OUTPUT_LOG
1277 if(opl_dbg_fp)
1278 {
1279 fclose(opl_dbg_fp);
1280 opl_dbg_fp = NULL;
1281 }
1282 #endif
1283 OPL_UnLockTable();
1284 free(OPL);
1285 }
1286
1287 /* ---------- Option handlers ---------- */
1288
OPLSetTimerHandler(FM_OPL * OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset)1289 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset)
1290 {
1291 OPL->TimerHandler = TimerHandler;
1292 OPL->TimerParam = channelOffset;
1293 }
OPLSetIRQHandler(FM_OPL * OPL,OPL_IRQHANDLER IRQHandler,int param)1294 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param)
1295 {
1296 OPL->IRQHandler = IRQHandler;
1297 OPL->IRQParam = param;
1298 }
OPLSetUpdateHandler(FM_OPL * OPL,OPL_UPDATEHANDLER UpdateHandler,int param)1299 void OPLSetUpdateHandler(FM_OPL *OPL,OPL_UPDATEHANDLER UpdateHandler,int param)
1300 {
1301 OPL->UpdateHandler = UpdateHandler;
1302 OPL->UpdateParam = param;
1303 }
1304 #if BUILD_Y8950
OPLSetPortHandler(FM_OPL * OPL,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,int param)1305 void OPLSetPortHandler(FM_OPL *OPL,OPL_PORTHANDLER_W PortHandler_w,OPL_PORTHANDLER_R PortHandler_r,int param)
1306 {
1307 OPL->porthandler_w = PortHandler_w;
1308 OPL->porthandler_r = PortHandler_r;
1309 OPL->port_param = param;
1310 }
1311
OPLSetKeyboardHandler(FM_OPL * OPL,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,int param)1312 void OPLSetKeyboardHandler(FM_OPL *OPL,OPL_PORTHANDLER_W KeyboardHandler_w,OPL_PORTHANDLER_R KeyboardHandler_r,int param)
1313 {
1314 OPL->keyboardhandler_w = KeyboardHandler_w;
1315 OPL->keyboardhandler_r = KeyboardHandler_r;
1316 OPL->keyboard_param = param;
1317 }
1318 #endif
1319 /* ---------- YM3812 I/O interface ---------- */
OPLWrite(FM_OPL * OPL,int a,int v)1320 int OPLWrite(FM_OPL *OPL,int a,int v)
1321 {
1322 if( !(a&1) )
1323 { /* address port */
1324 OPL->address = v & 0xff;
1325 }
1326 else
1327 { /* data port */
1328 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0);
1329 #ifdef OPL_OUTPUT_LOG
1330 if(opl_dbg_fp)
1331 {
1332 for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++)
1333 if( opl_dbg_opl[opl_dbg_chip] == OPL) break;
1334 fprintf(opl_dbg_fp,"%c%c%c",0x10+opl_dbg_chip,OPL->address,v);
1335 }
1336 #endif
1337 OPLWriteReg(OPL,OPL->address,v);
1338 }
1339 return OPL->status>>7;
1340 }
1341
OPLRead(FM_OPL * OPL,int a)1342 unsigned char OPLRead(FM_OPL *OPL,int a)
1343 {
1344 if( !(a&1) )
1345 { /* status port */
1346 return OPL->status & (OPL->statusmask|0x80);
1347 }
1348 /* data port */
1349 switch(OPL->address)
1350 {
1351 case 0x05: /* KeyBoard IN */
1352 if(OPL->type&OPL_TYPE_KEYBOARD)
1353 {
1354 if(OPL->keyboardhandler_r)
1355 return OPL->keyboardhandler_r(OPL->keyboard_param);
1356 else
1357 {
1358 LOG(LOG_WAR,("OPL:read unmapped KEYBOARD port\n"));
1359 }
1360 }
1361 return 0;
1362 #if 0
1363 case 0x0f: /* ADPCM-DATA */
1364 return 0;
1365 #endif
1366 case 0x19: /* I/O DATA */
1367 if(OPL->type&OPL_TYPE_IO)
1368 {
1369 if(OPL->porthandler_r)
1370 return OPL->porthandler_r(OPL->port_param);
1371 else
1372 {
1373 LOG(LOG_WAR,("OPL:read unmapped I/O port\n"));
1374 }
1375 }
1376 return 0;
1377 case 0x1a: /* PCM-DATA */
1378 return 0;
1379 }
1380 return 0;
1381 }
1382
OPLTimerOver(FM_OPL * OPL,int c)1383 int OPLTimerOver(FM_OPL *OPL,int c)
1384 {
1385 if( c )
1386 { /* Timer B */
1387 OPL_STATUS_SET(OPL,0x20);
1388 }
1389 else
1390 { /* Timer A */
1391 OPL_STATUS_SET(OPL,0x40);
1392 /* CSM mode key,TL controll */
1393 if( OPL->mode & 0x80 )
1394 { /* CSM mode total level latch and auto key on */
1395 int ch;
1396 if(OPL->UpdateHandler) OPL->UpdateHandler(OPL->UpdateParam,0);
1397 for(ch=0;ch<9;ch++)
1398 CSMKeyControll( &OPL->P_CH[ch] );
1399 }
1400 }
1401 /* reload timer */
1402 if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam+c,(double)OPL->T[c]*OPL->TimerBase);
1403 return OPL->status>>7;
1404 }
1405