1 | /* |
2 | ** |
3 | ** File: fmopl.c -- software implementation of FM sound generator |
4 | ** |
5 | ** Copyright (C) 1999,2000 Tatsuyuki Satoh , MultiArcadeMachineEmurator development |
6 | ** |
7 | ** Version 0.37a |
8 | ** |
9 | */ |
10 | |
11 | /* |
12 | preliminary : |
13 | Problem : |
14 | note: |
15 | */ |
16 | |
17 | /* This version of fmopl.c is a fork of the MAME one, relicensed under the LGPL. |
18 | * |
19 | * This library is free software; you can redistribute it and/or |
20 | * modify it under the terms of the GNU Lesser General Public |
21 | * License as published by the Free Software Foundation; either |
22 | * version 2.1 of the License, or (at your option) any later version. |
23 | * |
24 | * This library is distributed in the hope that it will be useful, |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
27 | * Lesser General Public License for more details. |
28 | * |
29 | * You should have received a copy of the GNU Lesser General Public |
30 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
31 | */ |
32 | |
33 | #include "qemu/osdep.h" |
34 | #include <math.h> |
35 | //#include "driver.h" /* use M.A.M.E. */ |
36 | #include "fmopl.h" |
37 | #ifndef PI |
38 | #define PI 3.14159265358979323846 |
39 | #endif |
40 | |
41 | /* -------------------- for debug --------------------- */ |
42 | /* #define OPL_OUTPUT_LOG */ |
43 | #ifdef OPL_OUTPUT_LOG |
44 | static FILE *opl_dbg_fp = NULL; |
45 | static FM_OPL *opl_dbg_opl[16]; |
46 | static int opl_dbg_maxchip,opl_dbg_chip; |
47 | #endif |
48 | |
49 | /* -------------------- preliminary define section --------------------- */ |
50 | /* attack/decay rate time rate */ |
51 | #define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */ |
52 | #define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */ |
53 | |
54 | #define DELTAT_MIXING_LEVEL (1) /* DELTA-T ADPCM MIXING LEVEL */ |
55 | |
56 | #define FREQ_BITS 24 /* frequency turn */ |
57 | |
58 | /* counter bits = 20 , octerve 7 */ |
59 | #define FREQ_RATE (1<<(FREQ_BITS-20)) |
60 | #define TL_BITS (FREQ_BITS+2) |
61 | |
62 | /* final output shift , limit minimum and maximum */ |
63 | #define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */ |
64 | #define OPL_MAXOUT (0x7fff<<OPL_OUTSB) |
65 | #define OPL_MINOUT (-0x8000<<OPL_OUTSB) |
66 | |
67 | /* -------------------- quality selection --------------------- */ |
68 | |
69 | /* sinwave entries */ |
70 | /* used static memory = SIN_ENT * 4 (byte) */ |
71 | #define SIN_ENT 2048 |
72 | |
73 | /* output level entries (envelope,sinwave) */ |
74 | /* envelope counter lower bits */ |
75 | #define ENV_BITS 16 |
76 | /* envelope output entries */ |
77 | #define EG_ENT 4096 |
78 | /* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */ |
79 | /* used static memory = EG_ENT*4 (byte) */ |
80 | |
81 | #define EG_OFF ((2*EG_ENT)<<ENV_BITS) /* OFF */ |
82 | #define EG_DED EG_OFF |
83 | #define EG_DST (EG_ENT<<ENV_BITS) /* DECAY START */ |
84 | #define EG_AED EG_DST |
85 | #define EG_AST 0 /* ATTACK START */ |
86 | |
87 | #define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */ |
88 | |
89 | /* LFO table entries */ |
90 | #define VIB_ENT 512 |
91 | #define VIB_SHIFT (32-9) |
92 | #define AMS_ENT 512 |
93 | #define AMS_SHIFT (32-9) |
94 | |
95 | #define VIB_RATE 256 |
96 | |
97 | /* -------------------- local defines , macros --------------------- */ |
98 | |
99 | /* register number to channel number , slot offset */ |
100 | #define SLOT1 0 |
101 | #define SLOT2 1 |
102 | |
103 | /* envelope phase */ |
104 | #define ENV_MOD_RR 0x00 |
105 | #define ENV_MOD_DR 0x01 |
106 | #define ENV_MOD_AR 0x02 |
107 | |
108 | /* -------------------- tables --------------------- */ |
109 | static const int slot_array[32]= |
110 | { |
111 | 0, 2, 4, 1, 3, 5,-1,-1, |
112 | 6, 8,10, 7, 9,11,-1,-1, |
113 | 12,14,16,13,15,17,-1,-1, |
114 | -1,-1,-1,-1,-1,-1,-1,-1 |
115 | }; |
116 | |
117 | /* key scale level */ |
118 | /* table is 3dB/OCT , DV converts this in TL step at 6dB/OCT */ |
119 | #define DV (EG_STEP/2) |
120 | static const uint32_t KSL_TABLE[8*16]= |
121 | { |
122 | /* OCT 0 */ |
123 | 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
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 | /* OCT 1 */ |
128 | 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
129 | 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
130 | 0.000/DV, 0.750/DV, 1.125/DV, 1.500/DV, |
131 | 1.875/DV, 2.250/DV, 2.625/DV, 3.000/DV, |
132 | /* OCT 2 */ |
133 | 0.000/DV, 0.000/DV, 0.000/DV, 0.000/DV, |
134 | 0.000/DV, 1.125/DV, 1.875/DV, 2.625/DV, |
135 | 3.000/DV, 3.750/DV, 4.125/DV, 4.500/DV, |
136 | 4.875/DV, 5.250/DV, 5.625/DV, 6.000/DV, |
137 | /* OCT 3 */ |
138 | 0.000/DV, 0.000/DV, 0.000/DV, 1.875/DV, |
139 | 3.000/DV, 4.125/DV, 4.875/DV, 5.625/DV, |
140 | 6.000/DV, 6.750/DV, 7.125/DV, 7.500/DV, |
141 | 7.875/DV, 8.250/DV, 8.625/DV, 9.000/DV, |
142 | /* OCT 4 */ |
143 | 0.000/DV, 0.000/DV, 3.000/DV, 4.875/DV, |
144 | 6.000/DV, 7.125/DV, 7.875/DV, 8.625/DV, |
145 | 9.000/DV, 9.750/DV,10.125/DV,10.500/DV, |
146 | 10.875/DV,11.250/DV,11.625/DV,12.000/DV, |
147 | /* OCT 5 */ |
148 | 0.000/DV, 3.000/DV, 6.000/DV, 7.875/DV, |
149 | 9.000/DV,10.125/DV,10.875/DV,11.625/DV, |
150 | 12.000/DV,12.750/DV,13.125/DV,13.500/DV, |
151 | 13.875/DV,14.250/DV,14.625/DV,15.000/DV, |
152 | /* OCT 6 */ |
153 | 0.000/DV, 6.000/DV, 9.000/DV,10.875/DV, |
154 | 12.000/DV,13.125/DV,13.875/DV,14.625/DV, |
155 | 15.000/DV,15.750/DV,16.125/DV,16.500/DV, |
156 | 16.875/DV,17.250/DV,17.625/DV,18.000/DV, |
157 | /* OCT 7 */ |
158 | 0.000/DV, 9.000/DV,12.000/DV,13.875/DV, |
159 | 15.000/DV,16.125/DV,16.875/DV,17.625/DV, |
160 | 18.000/DV,18.750/DV,19.125/DV,19.500/DV, |
161 | 19.875/DV,20.250/DV,20.625/DV,21.000/DV |
162 | }; |
163 | #undef DV |
164 | |
165 | /* sustain lebel table (3db per step) */ |
166 | /* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/ |
167 | #define SC(db) (db*((3/EG_STEP)*(1<<ENV_BITS)))+EG_DST |
168 | static const int32_t SL_TABLE[16]={ |
169 | SC( 0),SC( 1),SC( 2),SC(3 ),SC(4 ),SC(5 ),SC(6 ),SC( 7), |
170 | SC( 8),SC( 9),SC(10),SC(11),SC(12),SC(13),SC(14),SC(31) |
171 | }; |
172 | #undef SC |
173 | |
174 | #define TL_MAX (EG_ENT*2) /* limit(tl + ksr + envelope) + sinwave */ |
175 | /* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */ |
176 | /* TL_TABLE[ 0 to TL_MAX ] : plus section */ |
177 | /* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */ |
178 | static int32_t *TL_TABLE; |
179 | |
180 | /* pointers to TL_TABLE with sinwave output offset */ |
181 | static int32_t **SIN_TABLE; |
182 | |
183 | /* LFO table */ |
184 | static int32_t *AMS_TABLE; |
185 | static int32_t *VIB_TABLE; |
186 | |
187 | /* envelope output curve table */ |
188 | /* attack + decay + OFF */ |
189 | static int32_t ENV_CURVE[2*EG_ENT+1]; |
190 | |
191 | /* multiple table */ |
192 | #define ML 2 |
193 | static const uint32_t MUL_TABLE[16]= { |
194 | /* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */ |
195 | 0.50*ML, 1.00*ML, 2.00*ML, 3.00*ML, 4.00*ML, 5.00*ML, 6.00*ML, 7.00*ML, |
196 | 8.00*ML, 9.00*ML,10.00*ML,10.00*ML,12.00*ML,12.00*ML,15.00*ML,15.00*ML |
197 | }; |
198 | #undef ML |
199 | |
200 | /* dummy attack / decay rate ( when rate == 0 ) */ |
201 | static int32_t RATE_0[16]= |
202 | {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; |
203 | |
204 | /* -------------------- static state --------------------- */ |
205 | |
206 | /* lock level of common table */ |
207 | static int num_lock = 0; |
208 | |
209 | /* work table */ |
210 | static void *cur_chip = NULL; /* current chip point */ |
211 | /* currenct chip state */ |
212 | /* static OPLSAMPLE *bufL,*bufR; */ |
213 | static OPL_CH *S_CH; |
214 | static OPL_CH *E_CH; |
215 | static OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2; |
216 | |
217 | static int32_t outd[1]; |
218 | static int32_t ams; |
219 | static int32_t vib; |
220 | static int32_t *ams_table; |
221 | static int32_t *vib_table; |
222 | static int32_t amsIncr; |
223 | static int32_t vibIncr; |
224 | static int32_t feedback2; /* connect for SLOT 2 */ |
225 | |
226 | /* log output level */ |
227 | #define LOG_ERR 3 /* ERROR */ |
228 | #define LOG_WAR 2 /* WARNING */ |
229 | #define LOG_INF 1 /* INFORMATION */ |
230 | |
231 | //#define LOG_LEVEL LOG_INF |
232 | #define LOG_LEVEL LOG_ERR |
233 | |
234 | //#define LOG(n,x) if( (n)>=LOG_LEVEL ) logerror x |
235 | #define LOG(n,x) |
236 | |
237 | /* --------------------- subroutines --------------------- */ |
238 | |
239 | static inline int Limit( int val, int max, int min ) { |
240 | if ( val > max ) |
241 | val = max; |
242 | else if ( val < min ) |
243 | val = min; |
244 | |
245 | return val; |
246 | } |
247 | |
248 | /* status set and IRQ handling */ |
249 | static inline void OPL_STATUS_SET(FM_OPL *OPL,int flag) |
250 | { |
251 | /* set status flag */ |
252 | OPL->status |= flag; |
253 | if(!(OPL->status & 0x80)) |
254 | { |
255 | if(OPL->status & OPL->statusmask) |
256 | { /* IRQ on */ |
257 | OPL->status |= 0x80; |
258 | } |
259 | } |
260 | } |
261 | |
262 | /* status reset and IRQ handling */ |
263 | static inline void OPL_STATUS_RESET(FM_OPL *OPL,int flag) |
264 | { |
265 | /* reset status flag */ |
266 | OPL->status &=~flag; |
267 | if((OPL->status & 0x80)) |
268 | { |
269 | if (!(OPL->status & OPL->statusmask) ) |
270 | { |
271 | OPL->status &= 0x7f; |
272 | } |
273 | } |
274 | } |
275 | |
276 | /* IRQ mask set */ |
277 | static inline void OPL_STATUSMASK_SET(FM_OPL *OPL,int flag) |
278 | { |
279 | OPL->statusmask = flag; |
280 | /* IRQ handling check */ |
281 | OPL_STATUS_SET(OPL,0); |
282 | OPL_STATUS_RESET(OPL,0); |
283 | } |
284 | |
285 | /* ----- key on ----- */ |
286 | static inline void OPL_KEYON(OPL_SLOT *SLOT) |
287 | { |
288 | /* sin wave restart */ |
289 | SLOT->Cnt = 0; |
290 | /* set attack */ |
291 | SLOT->evm = ENV_MOD_AR; |
292 | SLOT->evs = SLOT->evsa; |
293 | SLOT->evc = EG_AST; |
294 | SLOT->eve = EG_AED; |
295 | } |
296 | /* ----- key off ----- */ |
297 | static inline void OPL_KEYOFF(OPL_SLOT *SLOT) |
298 | { |
299 | if( SLOT->evm > ENV_MOD_RR) |
300 | { |
301 | /* set envelope counter from envleope output */ |
302 | SLOT->evm = ENV_MOD_RR; |
303 | if( !(SLOT->evc&EG_DST) ) |
304 | //SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST; |
305 | SLOT->evc = EG_DST; |
306 | SLOT->eve = EG_DED; |
307 | SLOT->evs = SLOT->evsr; |
308 | } |
309 | } |
310 | |
311 | /* ---------- calcrate Envelope Generator & Phase Generator ---------- */ |
312 | /* return : envelope output */ |
313 | static inline uint32_t OPL_CALC_SLOT( OPL_SLOT *SLOT ) |
314 | { |
315 | /* calcrate envelope generator */ |
316 | if( (SLOT->evc+=SLOT->evs) >= SLOT->eve ) |
317 | { |
318 | switch( SLOT->evm ){ |
319 | case ENV_MOD_AR: /* ATTACK -> DECAY1 */ |
320 | /* next DR */ |
321 | SLOT->evm = ENV_MOD_DR; |
322 | SLOT->evc = EG_DST; |
323 | SLOT->eve = SLOT->SL; |
324 | SLOT->evs = SLOT->evsd; |
325 | break; |
326 | case ENV_MOD_DR: /* DECAY -> SL or RR */ |
327 | SLOT->evc = SLOT->SL; |
328 | SLOT->eve = EG_DED; |
329 | if(SLOT->eg_typ) |
330 | { |
331 | SLOT->evs = 0; |
332 | } |
333 | else |
334 | { |
335 | SLOT->evm = ENV_MOD_RR; |
336 | SLOT->evs = SLOT->evsr; |
337 | } |
338 | break; |
339 | case ENV_MOD_RR: /* RR -> OFF */ |
340 | SLOT->evc = EG_OFF; |
341 | SLOT->eve = EG_OFF+1; |
342 | SLOT->evs = 0; |
343 | break; |
344 | } |
345 | } |
346 | /* calcrate envelope */ |
347 | return SLOT->TLL+ENV_CURVE[SLOT->evc>>ENV_BITS]+(SLOT->ams ? ams : 0); |
348 | } |
349 | |
350 | /* set algorithm connection */ |
351 | static void set_algorithm( OPL_CH *CH) |
352 | { |
353 | int32_t *carrier = &outd[0]; |
354 | CH->connect1 = CH->CON ? carrier : &feedback2; |
355 | CH->connect2 = carrier; |
356 | } |
357 | |
358 | /* ---------- frequency counter for operater update ---------- */ |
359 | static inline void CALC_FCSLOT(OPL_CH *CH,OPL_SLOT *SLOT) |
360 | { |
361 | int ksr; |
362 | |
363 | /* frequency step counter */ |
364 | SLOT->Incr = CH->fc * SLOT->mul; |
365 | ksr = CH->kcode >> SLOT->KSR; |
366 | |
367 | if( SLOT->ksr != ksr ) |
368 | { |
369 | SLOT->ksr = ksr; |
370 | /* attack , decay rate recalcration */ |
371 | SLOT->evsa = SLOT->AR[ksr]; |
372 | SLOT->evsd = SLOT->DR[ksr]; |
373 | SLOT->evsr = SLOT->RR[ksr]; |
374 | } |
375 | SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); |
376 | } |
377 | |
378 | /* set multi,am,vib,EG-TYP,KSR,mul */ |
379 | static inline void set_mul(FM_OPL *OPL,int slot,int v) |
380 | { |
381 | OPL_CH *CH = &OPL->P_CH[slot/2]; |
382 | OPL_SLOT *SLOT = &CH->SLOT[slot&1]; |
383 | |
384 | SLOT->mul = MUL_TABLE[v&0x0f]; |
385 | SLOT->KSR = (v&0x10) ? 0 : 2; |
386 | SLOT->eg_typ = (v&0x20)>>5; |
387 | SLOT->vib = (v&0x40); |
388 | SLOT->ams = (v&0x80); |
389 | CALC_FCSLOT(CH,SLOT); |
390 | } |
391 | |
392 | /* set ksl & tl */ |
393 | static inline void set_ksl_tl(FM_OPL *OPL,int slot,int v) |
394 | { |
395 | OPL_CH *CH = &OPL->P_CH[slot/2]; |
396 | OPL_SLOT *SLOT = &CH->SLOT[slot&1]; |
397 | int ksl = v>>6; /* 0 / 1.5 / 3 / 6 db/OCT */ |
398 | |
399 | SLOT->ksl = ksl ? 3-ksl : 31; |
400 | SLOT->TL = (v&0x3f)*(0.75/EG_STEP); /* 0.75db step */ |
401 | |
402 | if( !(OPL->mode&0x80) ) |
403 | { /* not CSM latch total level */ |
404 | SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl); |
405 | } |
406 | } |
407 | |
408 | /* set attack rate & decay rate */ |
409 | static inline void set_ar_dr(FM_OPL *OPL,int slot,int v) |
410 | { |
411 | OPL_CH *CH = &OPL->P_CH[slot/2]; |
412 | OPL_SLOT *SLOT = &CH->SLOT[slot&1]; |
413 | int ar = v>>4; |
414 | int dr = v&0x0f; |
415 | |
416 | SLOT->AR = ar ? &OPL->AR_TABLE[ar<<2] : RATE_0; |
417 | SLOT->evsa = SLOT->AR[SLOT->ksr]; |
418 | if( SLOT->evm == ENV_MOD_AR ) SLOT->evs = SLOT->evsa; |
419 | |
420 | SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0; |
421 | SLOT->evsd = SLOT->DR[SLOT->ksr]; |
422 | if( SLOT->evm == ENV_MOD_DR ) SLOT->evs = SLOT->evsd; |
423 | } |
424 | |
425 | /* set sustain level & release rate */ |
426 | static inline void set_sl_rr(FM_OPL *OPL,int slot,int v) |
427 | { |
428 | OPL_CH *CH = &OPL->P_CH[slot/2]; |
429 | OPL_SLOT *SLOT = &CH->SLOT[slot&1]; |
430 | int sl = v>>4; |
431 | int rr = v & 0x0f; |
432 | |
433 | SLOT->SL = SL_TABLE[sl]; |
434 | if( SLOT->evm == ENV_MOD_DR ) SLOT->eve = SLOT->SL; |
435 | SLOT->RR = &OPL->DR_TABLE[rr<<2]; |
436 | SLOT->evsr = SLOT->RR[SLOT->ksr]; |
437 | if( SLOT->evm == ENV_MOD_RR ) SLOT->evs = SLOT->evsr; |
438 | } |
439 | |
440 | /* operator output calcrator */ |
441 | #define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt+con)/(0x1000000/SIN_ENT))&(SIN_ENT-1)][env] |
442 | /* ---------- calcrate one of channel ---------- */ |
443 | static inline void OPL_CALC_CH( OPL_CH *CH ) |
444 | { |
445 | uint32_t env_out; |
446 | OPL_SLOT *SLOT; |
447 | |
448 | feedback2 = 0; |
449 | /* SLOT 1 */ |
450 | SLOT = &CH->SLOT[SLOT1]; |
451 | env_out=OPL_CALC_SLOT(SLOT); |
452 | if( env_out < EG_ENT-1 ) |
453 | { |
454 | /* PG */ |
455 | if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); |
456 | else SLOT->Cnt += SLOT->Incr; |
457 | /* connectoion */ |
458 | if(CH->FB) |
459 | { |
460 | int feedback1 = (CH->op1_out[0]+CH->op1_out[1])>>CH->FB; |
461 | CH->op1_out[1] = CH->op1_out[0]; |
462 | *CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT,env_out,feedback1); |
463 | } |
464 | else |
465 | { |
466 | *CH->connect1 += OP_OUT(SLOT,env_out,0); |
467 | } |
468 | }else |
469 | { |
470 | CH->op1_out[1] = CH->op1_out[0]; |
471 | CH->op1_out[0] = 0; |
472 | } |
473 | /* SLOT 2 */ |
474 | SLOT = &CH->SLOT[SLOT2]; |
475 | env_out=OPL_CALC_SLOT(SLOT); |
476 | if( env_out < EG_ENT-1 ) |
477 | { |
478 | /* PG */ |
479 | if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); |
480 | else SLOT->Cnt += SLOT->Incr; |
481 | /* connectoion */ |
482 | outd[0] += OP_OUT(SLOT,env_out, feedback2); |
483 | } |
484 | } |
485 | |
486 | /* ---------- calcrate rhythm block ---------- */ |
487 | #define WHITE_NOISE_db 6.0 |
488 | static inline void OPL_CALC_RH( OPL_CH *CH ) |
489 | { |
490 | uint32_t env_tam,env_sd,env_top,env_hh; |
491 | int whitenoise = (rand()&1)*(WHITE_NOISE_db/EG_STEP); |
492 | int32_t tone8; |
493 | |
494 | OPL_SLOT *SLOT; |
495 | int env_out; |
496 | |
497 | /* BD : same as FM serial mode and output level is large */ |
498 | feedback2 = 0; |
499 | /* SLOT 1 */ |
500 | SLOT = &CH[6].SLOT[SLOT1]; |
501 | env_out=OPL_CALC_SLOT(SLOT); |
502 | if( env_out < EG_ENT-1 ) |
503 | { |
504 | /* PG */ |
505 | if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); |
506 | else SLOT->Cnt += SLOT->Incr; |
507 | /* connectoion */ |
508 | if(CH[6].FB) |
509 | { |
510 | int feedback1 = (CH[6].op1_out[0]+CH[6].op1_out[1])>>CH[6].FB; |
511 | CH[6].op1_out[1] = CH[6].op1_out[0]; |
512 | feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT,env_out,feedback1); |
513 | } |
514 | else |
515 | { |
516 | feedback2 = OP_OUT(SLOT,env_out,0); |
517 | } |
518 | }else |
519 | { |
520 | feedback2 = 0; |
521 | CH[6].op1_out[1] = CH[6].op1_out[0]; |
522 | CH[6].op1_out[0] = 0; |
523 | } |
524 | /* SLOT 2 */ |
525 | SLOT = &CH[6].SLOT[SLOT2]; |
526 | env_out=OPL_CALC_SLOT(SLOT); |
527 | if( env_out < EG_ENT-1 ) |
528 | { |
529 | /* PG */ |
530 | if(SLOT->vib) SLOT->Cnt += (SLOT->Incr*vib/VIB_RATE); |
531 | else SLOT->Cnt += SLOT->Incr; |
532 | /* connectoion */ |
533 | outd[0] += OP_OUT(SLOT,env_out, feedback2)*2; |
534 | } |
535 | |
536 | // SD (17) = mul14[fnum7] + white noise |
537 | // TAM (15) = mul15[fnum8] |
538 | // TOP (18) = fnum6(mul18[fnum8]+whitenoise) |
539 | // HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise |
540 | env_sd =OPL_CALC_SLOT(SLOT7_2) + whitenoise; |
541 | env_tam=OPL_CALC_SLOT(SLOT8_1); |
542 | env_top=OPL_CALC_SLOT(SLOT8_2); |
543 | env_hh =OPL_CALC_SLOT(SLOT7_1) + whitenoise; |
544 | |
545 | /* PG */ |
546 | if(SLOT7_1->vib) SLOT7_1->Cnt += (2*SLOT7_1->Incr*vib/VIB_RATE); |
547 | else SLOT7_1->Cnt += 2*SLOT7_1->Incr; |
548 | if(SLOT7_2->vib) SLOT7_2->Cnt += ((CH[7].fc*8)*vib/VIB_RATE); |
549 | else SLOT7_2->Cnt += (CH[7].fc*8); |
550 | if(SLOT8_1->vib) SLOT8_1->Cnt += (SLOT8_1->Incr*vib/VIB_RATE); |
551 | else SLOT8_1->Cnt += SLOT8_1->Incr; |
552 | if(SLOT8_2->vib) SLOT8_2->Cnt += ((CH[8].fc*48)*vib/VIB_RATE); |
553 | else SLOT8_2->Cnt += (CH[8].fc*48); |
554 | |
555 | tone8 = OP_OUT(SLOT8_2,whitenoise,0 ); |
556 | |
557 | /* SD */ |
558 | if( env_sd < EG_ENT-1 ) |
559 | outd[0] += OP_OUT(SLOT7_1,env_sd, 0)*8; |
560 | /* TAM */ |
561 | if( env_tam < EG_ENT-1 ) |
562 | outd[0] += OP_OUT(SLOT8_1,env_tam, 0)*2; |
563 | /* TOP-CY */ |
564 | if( env_top < EG_ENT-1 ) |
565 | outd[0] += OP_OUT(SLOT7_2,env_top,tone8)*2; |
566 | /* HH */ |
567 | if( env_hh < EG_ENT-1 ) |
568 | outd[0] += OP_OUT(SLOT7_2,env_hh,tone8)*2; |
569 | } |
570 | |
571 | /* ----------- initialize time tabls ----------- */ |
572 | static void init_timetables( FM_OPL *OPL , int ARRATE , int DRRATE ) |
573 | { |
574 | int i; |
575 | double rate; |
576 | |
577 | /* make attack rate & decay rate tables */ |
578 | for (i = 0;i < 4;i++) OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0; |
579 | for (i = 4;i <= 60;i++){ |
580 | rate = OPL->freqbase; /* frequency rate */ |
581 | if( i < 60 ) rate *= 1.0+(i&3)*0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */ |
582 | rate *= 1<<((i>>2)-1); /* b2-5 : shift bit */ |
583 | rate *= (double)(EG_ENT<<ENV_BITS); |
584 | OPL->AR_TABLE[i] = rate / ARRATE; |
585 | OPL->DR_TABLE[i] = rate / DRRATE; |
586 | } |
587 | for (i = 60; i < ARRAY_SIZE(OPL->AR_TABLE); i++) |
588 | { |
589 | OPL->AR_TABLE[i] = EG_AED-1; |
590 | OPL->DR_TABLE[i] = OPL->DR_TABLE[60]; |
591 | } |
592 | #if 0 |
593 | for (i = 0;i < 64 ;i++){ /* make for overflow area */ |
594 | LOG(LOG_WAR, ("rate %2d , ar %f ms , dr %f ms\n" , i, |
595 | ((double)(EG_ENT<<ENV_BITS) / OPL->AR_TABLE[i]) * (1000.0 / OPL->rate), |
596 | ((double)(EG_ENT<<ENV_BITS) / OPL->DR_TABLE[i]) * (1000.0 / OPL->rate) )); |
597 | } |
598 | #endif |
599 | } |
600 | |
601 | /* ---------- generic table initialize ---------- */ |
602 | static int OPLOpenTable( void ) |
603 | { |
604 | int s,t; |
605 | double rate; |
606 | int i,j; |
607 | double pom; |
608 | |
609 | /* allocate dynamic tables */ |
610 | if( (TL_TABLE = malloc(TL_MAX*2*sizeof(int32_t))) == NULL) |
611 | return 0; |
612 | if( (SIN_TABLE = malloc(SIN_ENT*4 *sizeof(int32_t *))) == NULL) |
613 | { |
614 | free(TL_TABLE); |
615 | return 0; |
616 | } |
617 | if( (AMS_TABLE = malloc(AMS_ENT*2 *sizeof(int32_t))) == NULL) |
618 | { |
619 | free(TL_TABLE); |
620 | free(SIN_TABLE); |
621 | return 0; |
622 | } |
623 | if( (VIB_TABLE = malloc(VIB_ENT*2 *sizeof(int32_t))) == NULL) |
624 | { |
625 | free(TL_TABLE); |
626 | free(SIN_TABLE); |
627 | free(AMS_TABLE); |
628 | return 0; |
629 | } |
630 | /* make total level table */ |
631 | for (t = 0;t < EG_ENT-1 ;t++){ |
632 | rate = ((1<<TL_BITS)-1)/pow(10,EG_STEP*t/20); /* dB -> voltage */ |
633 | TL_TABLE[ t] = (int)rate; |
634 | TL_TABLE[TL_MAX+t] = -TL_TABLE[t]; |
635 | /* LOG(LOG_INF,("TotalLevel(%3d) = %x\n",t,TL_TABLE[t]));*/ |
636 | } |
637 | /* fill volume off area */ |
638 | for ( t = EG_ENT-1; t < TL_MAX ;t++){ |
639 | TL_TABLE[t] = TL_TABLE[TL_MAX+t] = 0; |
640 | } |
641 | |
642 | /* make sinwave table (total level offet) */ |
643 | /* degree 0 = degree 180 = off */ |
644 | SIN_TABLE[0] = SIN_TABLE[SIN_ENT/2] = &TL_TABLE[EG_ENT-1]; |
645 | for (s = 1;s <= SIN_ENT/4;s++){ |
646 | pom = sin(2*PI*s/SIN_ENT); /* sin */ |
647 | pom = 20*log10(1/pom); /* decibel */ |
648 | j = pom / EG_STEP; /* TL_TABLE steps */ |
649 | |
650 | /* degree 0 - 90 , degree 180 - 90 : plus section */ |
651 | SIN_TABLE[ s] = SIN_TABLE[SIN_ENT/2-s] = &TL_TABLE[j]; |
652 | /* degree 180 - 270 , degree 360 - 270 : minus section */ |
653 | SIN_TABLE[SIN_ENT/2+s] = SIN_TABLE[SIN_ENT -s] = &TL_TABLE[TL_MAX+j]; |
654 | /* LOG(LOG_INF,("sin(%3d) = %f:%f db\n",s,pom,(double)j * EG_STEP));*/ |
655 | } |
656 | for (s = 0;s < SIN_ENT;s++) |
657 | { |
658 | SIN_TABLE[SIN_ENT*1+s] = s<(SIN_ENT/2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT]; |
659 | SIN_TABLE[SIN_ENT*2+s] = SIN_TABLE[s % (SIN_ENT/2)]; |
660 | SIN_TABLE[SIN_ENT*3+s] = (s/(SIN_ENT/4))&1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT*2+s]; |
661 | } |
662 | |
663 | /* envelope counter -> envelope output table */ |
664 | for (i=0; i<EG_ENT; i++) |
665 | { |
666 | /* ATTACK curve */ |
667 | pom = pow( ((double)(EG_ENT-1-i)/EG_ENT) , 8 ) * EG_ENT; |
668 | /* if( pom >= EG_ENT ) pom = EG_ENT-1; */ |
669 | ENV_CURVE[i] = (int)pom; |
670 | /* DECAY ,RELEASE curve */ |
671 | ENV_CURVE[(EG_DST>>ENV_BITS)+i]= i; |
672 | } |
673 | /* off */ |
674 | ENV_CURVE[EG_OFF>>ENV_BITS]= EG_ENT-1; |
675 | /* make LFO ams table */ |
676 | for (i=0; i<AMS_ENT; i++) |
677 | { |
678 | pom = (1.0+sin(2*PI*i/AMS_ENT))/2; /* sin */ |
679 | AMS_TABLE[i] = (1.0/EG_STEP)*pom; /* 1dB */ |
680 | AMS_TABLE[AMS_ENT+i] = (4.8/EG_STEP)*pom; /* 4.8dB */ |
681 | } |
682 | /* make LFO vibrate table */ |
683 | for (i=0; i<VIB_ENT; i++) |
684 | { |
685 | /* 100cent = 1seminote = 6% ?? */ |
686 | pom = (double)VIB_RATE*0.06*sin(2*PI*i/VIB_ENT); /* +-100sect step */ |
687 | VIB_TABLE[i] = VIB_RATE + (pom*0.07); /* +- 7cent */ |
688 | VIB_TABLE[VIB_ENT+i] = VIB_RATE + (pom*0.14); /* +-14cent */ |
689 | /* LOG(LOG_INF,("vib %d=%d\n",i,VIB_TABLE[VIB_ENT+i])); */ |
690 | } |
691 | return 1; |
692 | } |
693 | |
694 | |
695 | static void OPLCloseTable( void ) |
696 | { |
697 | free(TL_TABLE); |
698 | free(SIN_TABLE); |
699 | free(AMS_TABLE); |
700 | free(VIB_TABLE); |
701 | } |
702 | |
703 | /* CSM Key Control */ |
704 | static inline void CSMKeyControll(OPL_CH *CH) |
705 | { |
706 | OPL_SLOT *slot1 = &CH->SLOT[SLOT1]; |
707 | OPL_SLOT *slot2 = &CH->SLOT[SLOT2]; |
708 | /* all key off */ |
709 | OPL_KEYOFF(slot1); |
710 | OPL_KEYOFF(slot2); |
711 | /* total level latch */ |
712 | slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); |
713 | slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl); |
714 | /* key on */ |
715 | CH->op1_out[0] = CH->op1_out[1] = 0; |
716 | OPL_KEYON(slot1); |
717 | OPL_KEYON(slot2); |
718 | } |
719 | |
720 | /* ---------- opl initialize ---------- */ |
721 | static void OPL_initialize(FM_OPL *OPL) |
722 | { |
723 | int fn; |
724 | |
725 | /* frequency base */ |
726 | OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0; |
727 | /* Timer base time */ |
728 | OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 ); |
729 | /* make time tables */ |
730 | init_timetables( OPL , OPL_ARRATE , OPL_DRRATE ); |
731 | /* make fnumber -> increment counter table */ |
732 | for( fn=0 ; fn < 1024 ; fn++ ) |
733 | { |
734 | OPL->FN_TABLE[fn] = OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2; |
735 | } |
736 | /* LFO freq.table */ |
737 | OPL->amsIncr = OPL->rate ? (double)AMS_ENT*(1<<AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0; |
738 | OPL->vibIncr = OPL->rate ? (double)VIB_ENT*(1<<VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0; |
739 | } |
740 | |
741 | /* ---------- write a OPL registers ---------- */ |
742 | static void OPLWriteReg(FM_OPL *OPL, int r, int v) |
743 | { |
744 | OPL_CH *CH; |
745 | int slot; |
746 | int block_fnum; |
747 | |
748 | switch(r&0xe0) |
749 | { |
750 | case 0x00: /* 00-1f:control */ |
751 | switch(r&0x1f) |
752 | { |
753 | case 0x01: |
754 | /* wave selector enable */ |
755 | OPL->wavesel = v&0x20; |
756 | if(!OPL->wavesel) |
757 | { |
758 | /* preset compatible mode */ |
759 | int c; |
760 | for(c=0;c<OPL->max_ch;c++) |
761 | { |
762 | OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0]; |
763 | OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0]; |
764 | } |
765 | } |
766 | return; |
767 | case 0x02: /* Timer 1 */ |
768 | OPL->T[0] = (256-v)*4; |
769 | break; |
770 | case 0x03: /* Timer 2 */ |
771 | OPL->T[1] = (256-v)*16; |
772 | return; |
773 | case 0x04: /* IRQ clear / mask and Timer enable */ |
774 | if(v&0x80) |
775 | { /* IRQ flag clear */ |
776 | OPL_STATUS_RESET(OPL,0x7f); |
777 | } |
778 | else |
779 | { /* set IRQ mask ,timer enable*/ |
780 | uint8_t st1 = v&1; |
781 | uint8_t st2 = (v>>1)&1; |
782 | /* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */ |
783 | OPL_STATUS_RESET(OPL,v&0x78); |
784 | OPL_STATUSMASK_SET(OPL,((~v)&0x78)|0x01); |
785 | /* timer 2 */ |
786 | if(OPL->st[1] != st2) |
787 | { |
788 | double interval = st2 ? (double)OPL->T[1]*OPL->TimerBase : 0.0; |
789 | OPL->st[1] = st2; |
790 | if (OPL->TimerHandler) { |
791 | (OPL->TimerHandler)(OPL->TimerParam, 1, interval); |
792 | } |
793 | } |
794 | /* timer 1 */ |
795 | if(OPL->st[0] != st1) |
796 | { |
797 | double interval = st1 ? (double)OPL->T[0]*OPL->TimerBase : 0.0; |
798 | OPL->st[0] = st1; |
799 | if (OPL->TimerHandler) { |
800 | (OPL->TimerHandler)(OPL->TimerParam, 0, interval); |
801 | } |
802 | } |
803 | } |
804 | return; |
805 | } |
806 | break; |
807 | case 0x20: /* am,vib,ksr,eg type,mul */ |
808 | slot = slot_array[r&0x1f]; |
809 | if(slot == -1) return; |
810 | set_mul(OPL,slot,v); |
811 | return; |
812 | case 0x40: |
813 | slot = slot_array[r&0x1f]; |
814 | if(slot == -1) return; |
815 | set_ksl_tl(OPL,slot,v); |
816 | return; |
817 | case 0x60: |
818 | slot = slot_array[r&0x1f]; |
819 | if(slot == -1) return; |
820 | set_ar_dr(OPL,slot,v); |
821 | return; |
822 | case 0x80: |
823 | slot = slot_array[r&0x1f]; |
824 | if(slot == -1) return; |
825 | set_sl_rr(OPL,slot,v); |
826 | return; |
827 | case 0xa0: |
828 | switch(r) |
829 | { |
830 | case 0xbd: |
831 | /* amsep,vibdep,r,bd,sd,tom,tc,hh */ |
832 | { |
833 | uint8_t rkey = OPL->rhythm^v; |
834 | OPL->ams_table = &AMS_TABLE[v&0x80 ? AMS_ENT : 0]; |
835 | OPL->vib_table = &VIB_TABLE[v&0x40 ? VIB_ENT : 0]; |
836 | OPL->rhythm = v&0x3f; |
837 | if(OPL->rhythm&0x20) |
838 | { |
839 | #if 0 |
840 | usrintf_showmessage("OPL Rhythm mode select" ); |
841 | #endif |
842 | /* BD key on/off */ |
843 | if(rkey&0x10) |
844 | { |
845 | if(v&0x10) |
846 | { |
847 | OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0; |
848 | OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]); |
849 | OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]); |
850 | } |
851 | else |
852 | { |
853 | OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]); |
854 | OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]); |
855 | } |
856 | } |
857 | /* SD key on/off */ |
858 | if(rkey&0x08) |
859 | { |
860 | if(v&0x08) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]); |
861 | else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]); |
862 | }/* TAM key on/off */ |
863 | if(rkey&0x04) |
864 | { |
865 | if(v&0x04) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]); |
866 | else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]); |
867 | } |
868 | /* TOP-CY key on/off */ |
869 | if(rkey&0x02) |
870 | { |
871 | if(v&0x02) OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]); |
872 | else OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]); |
873 | } |
874 | /* HH key on/off */ |
875 | if(rkey&0x01) |
876 | { |
877 | if(v&0x01) OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]); |
878 | else OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]); |
879 | } |
880 | } |
881 | } |
882 | return; |
883 | } |
884 | /* keyon,block,fnum */ |
885 | if( (r&0x0f) > 8) return; |
886 | CH = &OPL->P_CH[r&0x0f]; |
887 | if(!(r&0x10)) |
888 | { /* a0-a8 */ |
889 | block_fnum = (CH->block_fnum&0x1f00) | v; |
890 | } |
891 | else |
892 | { /* b0-b8 */ |
893 | int keyon = (v>>5)&1; |
894 | block_fnum = ((v&0x1f)<<8) | (CH->block_fnum&0xff); |
895 | if(CH->keyon != keyon) |
896 | { |
897 | if( (CH->keyon=keyon) ) |
898 | { |
899 | CH->op1_out[0] = CH->op1_out[1] = 0; |
900 | OPL_KEYON(&CH->SLOT[SLOT1]); |
901 | OPL_KEYON(&CH->SLOT[SLOT2]); |
902 | } |
903 | else |
904 | { |
905 | OPL_KEYOFF(&CH->SLOT[SLOT1]); |
906 | OPL_KEYOFF(&CH->SLOT[SLOT2]); |
907 | } |
908 | } |
909 | } |
910 | /* update */ |
911 | if(CH->block_fnum != block_fnum) |
912 | { |
913 | int blockRv = 7-(block_fnum>>10); |
914 | int fnum = block_fnum&0x3ff; |
915 | CH->block_fnum = block_fnum; |
916 | |
917 | CH->ksl_base = KSL_TABLE[block_fnum>>6]; |
918 | CH->fc = OPL->FN_TABLE[fnum]>>blockRv; |
919 | CH->kcode = CH->block_fnum>>9; |
920 | if( (OPL->mode&0x40) && CH->block_fnum&0x100) CH->kcode |=1; |
921 | CALC_FCSLOT(CH,&CH->SLOT[SLOT1]); |
922 | CALC_FCSLOT(CH,&CH->SLOT[SLOT2]); |
923 | } |
924 | return; |
925 | case 0xc0: |
926 | /* FB,C */ |
927 | if( (r&0x0f) > 8) return; |
928 | CH = &OPL->P_CH[r&0x0f]; |
929 | { |
930 | int feedback = (v>>1)&7; |
931 | CH->FB = feedback ? (8+1) - feedback : 0; |
932 | CH->CON = v&1; |
933 | set_algorithm(CH); |
934 | } |
935 | return; |
936 | case 0xe0: /* wave type */ |
937 | slot = slot_array[r&0x1f]; |
938 | if(slot == -1) return; |
939 | CH = &OPL->P_CH[slot/2]; |
940 | if(OPL->wavesel) |
941 | { |
942 | /* LOG(LOG_INF,("OPL SLOT %d wave select %d\n",slot,v&3)); */ |
943 | CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v&0x03)*SIN_ENT]; |
944 | } |
945 | return; |
946 | } |
947 | } |
948 | |
949 | /* lock/unlock for common table */ |
950 | static int OPL_LockTable(void) |
951 | { |
952 | num_lock++; |
953 | if(num_lock>1) return 0; |
954 | /* first time */ |
955 | cur_chip = NULL; |
956 | /* allocate total level table (128kb space) */ |
957 | if( !OPLOpenTable() ) |
958 | { |
959 | num_lock--; |
960 | return -1; |
961 | } |
962 | return 0; |
963 | } |
964 | |
965 | static void OPL_UnLockTable(void) |
966 | { |
967 | if(num_lock) num_lock--; |
968 | if(num_lock) return; |
969 | /* last time */ |
970 | cur_chip = NULL; |
971 | OPLCloseTable(); |
972 | } |
973 | |
974 | /*******************************************************************************/ |
975 | /* YM3812 local section */ |
976 | /*******************************************************************************/ |
977 | |
978 | /* ---------- update one of chip ----------- */ |
979 | void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length) |
980 | { |
981 | int i; |
982 | int data; |
983 | int16_t *buf = buffer; |
984 | uint32_t amsCnt = OPL->amsCnt; |
985 | uint32_t vibCnt = OPL->vibCnt; |
986 | uint8_t rhythm = OPL->rhythm&0x20; |
987 | OPL_CH *CH,*R_CH; |
988 | |
989 | if( (void *)OPL != cur_chip ){ |
990 | cur_chip = (void *)OPL; |
991 | /* channel pointers */ |
992 | S_CH = OPL->P_CH; |
993 | E_CH = &S_CH[9]; |
994 | /* rhythm slot */ |
995 | SLOT7_1 = &S_CH[7].SLOT[SLOT1]; |
996 | SLOT7_2 = &S_CH[7].SLOT[SLOT2]; |
997 | SLOT8_1 = &S_CH[8].SLOT[SLOT1]; |
998 | SLOT8_2 = &S_CH[8].SLOT[SLOT2]; |
999 | /* LFO state */ |
1000 | amsIncr = OPL->amsIncr; |
1001 | vibIncr = OPL->vibIncr; |
1002 | ams_table = OPL->ams_table; |
1003 | vib_table = OPL->vib_table; |
1004 | } |
1005 | R_CH = rhythm ? &S_CH[6] : E_CH; |
1006 | for( i=0; i < length ; i++ ) |
1007 | { |
1008 | /* channel A channel B channel C */ |
1009 | /* LFO */ |
1010 | ams = ams_table[(amsCnt+=amsIncr)>>AMS_SHIFT]; |
1011 | vib = vib_table[(vibCnt+=vibIncr)>>VIB_SHIFT]; |
1012 | outd[0] = 0; |
1013 | /* FM part */ |
1014 | for(CH=S_CH ; CH < R_CH ; CH++) |
1015 | OPL_CALC_CH(CH); |
1016 | /* Rythn part */ |
1017 | if(rhythm) |
1018 | OPL_CALC_RH(S_CH); |
1019 | /* limit check */ |
1020 | data = Limit( outd[0] , OPL_MAXOUT, OPL_MINOUT ); |
1021 | /* store to sound buffer */ |
1022 | buf[i] = data >> OPL_OUTSB; |
1023 | } |
1024 | |
1025 | OPL->amsCnt = amsCnt; |
1026 | OPL->vibCnt = vibCnt; |
1027 | #ifdef OPL_OUTPUT_LOG |
1028 | if(opl_dbg_fp) |
1029 | { |
1030 | for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) |
1031 | if( opl_dbg_opl[opl_dbg_chip] == OPL) break; |
1032 | fprintf(opl_dbg_fp,"%c%c%c" ,0x20+opl_dbg_chip,length&0xff,length/256); |
1033 | } |
1034 | #endif |
1035 | } |
1036 | |
1037 | /* ---------- reset one of chip ---------- */ |
1038 | static void OPLResetChip(FM_OPL *OPL) |
1039 | { |
1040 | int c,s; |
1041 | int i; |
1042 | |
1043 | /* reset chip */ |
1044 | OPL->mode = 0; /* normal mode */ |
1045 | OPL_STATUS_RESET(OPL,0x7f); |
1046 | /* reset with register write */ |
1047 | OPLWriteReg(OPL,0x01,0); /* wabesel disable */ |
1048 | OPLWriteReg(OPL,0x02,0); /* Timer1 */ |
1049 | OPLWriteReg(OPL,0x03,0); /* Timer2 */ |
1050 | OPLWriteReg(OPL,0x04,0); /* IRQ mask clear */ |
1051 | for(i = 0xff ; i >= 0x20 ; i-- ) OPLWriteReg(OPL,i,0); |
1052 | /* reset operator parameter */ |
1053 | for( c = 0 ; c < OPL->max_ch ; c++ ) |
1054 | { |
1055 | OPL_CH *CH = &OPL->P_CH[c]; |
1056 | /* OPL->P_CH[c].PAN = OPN_CENTER; */ |
1057 | for(s = 0 ; s < 2 ; s++ ) |
1058 | { |
1059 | /* wave table */ |
1060 | CH->SLOT[s].wavetable = &SIN_TABLE[0]; |
1061 | /* CH->SLOT[s].evm = ENV_MOD_RR; */ |
1062 | CH->SLOT[s].evc = EG_OFF; |
1063 | CH->SLOT[s].eve = EG_OFF+1; |
1064 | CH->SLOT[s].evs = 0; |
1065 | } |
1066 | } |
1067 | } |
1068 | |
1069 | /* ---------- Create one of vietual YM3812 ---------- */ |
1070 | /* 'rate' is sampling rate and 'bufsiz' is the size of the */ |
1071 | FM_OPL *OPLCreate(int clock, int rate) |
1072 | { |
1073 | char *ptr; |
1074 | FM_OPL *OPL; |
1075 | int state_size; |
1076 | int max_ch = 9; /* normaly 9 channels */ |
1077 | |
1078 | if( OPL_LockTable() ==-1) return NULL; |
1079 | /* allocate OPL state space */ |
1080 | state_size = sizeof(FM_OPL); |
1081 | state_size += sizeof(OPL_CH)*max_ch; |
1082 | /* allocate memory block */ |
1083 | ptr = malloc(state_size); |
1084 | if(ptr==NULL) return NULL; |
1085 | /* clear */ |
1086 | memset(ptr,0,state_size); |
1087 | OPL = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL); |
1088 | OPL->P_CH = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch; |
1089 | /* set channel state pointer */ |
1090 | OPL->clock = clock; |
1091 | OPL->rate = rate; |
1092 | OPL->max_ch = max_ch; |
1093 | /* init grobal tables */ |
1094 | OPL_initialize(OPL); |
1095 | /* reset chip */ |
1096 | OPLResetChip(OPL); |
1097 | #ifdef OPL_OUTPUT_LOG |
1098 | if(!opl_dbg_fp) |
1099 | { |
1100 | opl_dbg_fp = fopen("opllog.opl" ,"wb" ); |
1101 | opl_dbg_maxchip = 0; |
1102 | } |
1103 | if(opl_dbg_fp) |
1104 | { |
1105 | opl_dbg_opl[opl_dbg_maxchip] = OPL; |
1106 | fprintf(opl_dbg_fp,"%c%c%c%c%c%c" ,0x00+opl_dbg_maxchip, |
1107 | type, |
1108 | clock&0xff, |
1109 | (clock/0x100)&0xff, |
1110 | (clock/0x10000)&0xff, |
1111 | (clock/0x1000000)&0xff); |
1112 | opl_dbg_maxchip++; |
1113 | } |
1114 | #endif |
1115 | return OPL; |
1116 | } |
1117 | |
1118 | /* ---------- Destroy one of vietual YM3812 ---------- */ |
1119 | void OPLDestroy(FM_OPL *OPL) |
1120 | { |
1121 | #ifdef OPL_OUTPUT_LOG |
1122 | if(opl_dbg_fp) |
1123 | { |
1124 | fclose(opl_dbg_fp); |
1125 | opl_dbg_fp = NULL; |
1126 | } |
1127 | #endif |
1128 | OPL_UnLockTable(); |
1129 | free(OPL); |
1130 | } |
1131 | |
1132 | /* ---------- Option handlers ---------- */ |
1133 | |
1134 | void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler, |
1135 | void *param) |
1136 | { |
1137 | OPL->TimerHandler = TimerHandler; |
1138 | OPL->TimerParam = param; |
1139 | } |
1140 | |
1141 | /* ---------- YM3812 I/O interface ---------- */ |
1142 | int OPLWrite(FM_OPL *OPL,int a,int v) |
1143 | { |
1144 | if( !(a&1) ) |
1145 | { /* address port */ |
1146 | OPL->address = v & 0xff; |
1147 | } |
1148 | else |
1149 | { /* data port */ |
1150 | #ifdef OPL_OUTPUT_LOG |
1151 | if(opl_dbg_fp) |
1152 | { |
1153 | for(opl_dbg_chip=0;opl_dbg_chip<opl_dbg_maxchip;opl_dbg_chip++) |
1154 | if( opl_dbg_opl[opl_dbg_chip] == OPL) break; |
1155 | fprintf(opl_dbg_fp,"%c%c%c" ,0x10+opl_dbg_chip,OPL->address,v); |
1156 | } |
1157 | #endif |
1158 | OPLWriteReg(OPL,OPL->address,v); |
1159 | } |
1160 | return OPL->status>>7; |
1161 | } |
1162 | |
1163 | unsigned char OPLRead(FM_OPL *OPL,int a) |
1164 | { |
1165 | if( !(a&1) ) |
1166 | { /* status port */ |
1167 | return OPL->status & (OPL->statusmask|0x80); |
1168 | } |
1169 | /* data port */ |
1170 | switch(OPL->address) |
1171 | { |
1172 | case 0x05: /* KeyBoard IN */ |
1173 | return 0; |
1174 | #if 0 |
1175 | case 0x0f: /* ADPCM-DATA */ |
1176 | return 0; |
1177 | #endif |
1178 | case 0x19: /* I/O DATA */ |
1179 | return 0; |
1180 | case 0x1a: /* PCM-DATA */ |
1181 | return 0; |
1182 | } |
1183 | return 0; |
1184 | } |
1185 | |
1186 | int OPLTimerOver(FM_OPL *OPL,int c) |
1187 | { |
1188 | if( c ) |
1189 | { /* Timer B */ |
1190 | OPL_STATUS_SET(OPL,0x20); |
1191 | } |
1192 | else |
1193 | { /* Timer A */ |
1194 | OPL_STATUS_SET(OPL,0x40); |
1195 | /* CSM mode key,TL control */ |
1196 | if( OPL->mode & 0x80 ) |
1197 | { /* CSM mode total level latch and auto key on */ |
1198 | int ch; |
1199 | for(ch=0;ch<9;ch++) |
1200 | CSMKeyControll( &OPL->P_CH[ch] ); |
1201 | } |
1202 | } |
1203 | /* reload timer */ |
1204 | if (OPL->TimerHandler) { |
1205 | (OPL->TimerHandler)(OPL->TimerParam, c, |
1206 | (double)OPL->T[c] * OPL->TimerBase); |
1207 | } |
1208 | return OPL->status>>7; |
1209 | } |
1210 | |