c62d2810 |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2002 Ben Parnell |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | /********************************************************/ |
22 | /******* sound.c */ |
23 | /******* */ |
24 | /******* Sound emulation code and waveform synthesis */ |
25 | /******* routines. A few ideas were inspired */ |
26 | /******* by code from Marat Fayzullin's EMUlib */ |
27 | /******* */ |
9115e7d2 |
28 | /********************************************************/ |
c62d2810 |
29 | |
30 | #include <stdlib.h> |
31 | #include <stdio.h> |
32 | |
33 | #include <string.h> |
34 | |
35 | #include "types.h" |
36 | #include "x6502.h" |
37 | |
38 | #include "fce.h" |
39 | #include "svga.h" |
40 | #include "sound.h" |
41 | |
42 | uint32 soundtsinc; |
43 | uint32 soundtsi; |
44 | |
45 | uint32 Wave[2048]; |
46 | int32 WaveFinal[2048]; |
5232c20c |
47 | int16 WaveFinalMono[2048]; |
c62d2810 |
48 | |
49 | EXPSOUND GameExpSound={0,0,0}; |
50 | |
51 | uint8 trimode=0; |
52 | uint8 tricoop=0; |
53 | uint8 PSG[0x18]; |
54 | |
55 | uint8 decvolume[3]; |
56 | uint8 realvolume[3]; |
57 | |
58 | static int32 count[5]; |
59 | static int64 sqacc[2]={0,0}; |
60 | uint8 sqnon=0; |
61 | |
62 | #undef printf |
63 | uint16 nreg; |
9115e7d2 |
64 | |
65 | int32 lengthcount[4]; |
c62d2810 |
66 | |
5232c20c |
67 | extern int soundvol; |
68 | |
c62d2810 |
69 | static const uint8 Slengthtable[0x20]= |
70 | { |
71 | 0x5,0x7f,0xA,0x1,0x14,0x2,0x28,0x3,0x50,0x4,0x1E,0x5,0x7,0x6,0x0E,0x7, |
72 | 0x6,0x08,0xC,0x9,0x18,0xa,0x30,0xb,0x60,0xc,0x24,0xd,0x8,0xe,0x10,0xf |
73 | }; |
74 | |
75 | static uint32 lengthtable[0x20]; |
76 | |
77 | static const uint32 SNoiseFreqTable[0x10]= |
78 | { |
79 | 2,4,8,0x10,0x20,0x30,0x40,0x50,0x65,0x7f,0xbe,0xfe,0x17d,0x1fc,0x3f9,0x7f2 |
80 | }; |
81 | static uint32 NoiseFreqTable[0x10]; |
82 | |
83 | int64 nesincsizeLL; |
84 | |
85 | static const uint8 NTSCPCMTable[0x10]= |
86 | { |
87 | 0xd6,0xbe,0xaa,0xa0,0x8f,0x7f,0x71,0x6b, |
88 | 0x5f,0x50,0x47,0x40,0x35,0x2a,0x24,0x1b |
89 | }; |
90 | |
91 | static const uint8 PALPCMTable[0x10]= // These values are just guessed. |
92 | { |
93 | 0xc6,0xb0,0x9d,0x94,0x84,0x75,0x68,0x63, |
94 | 0x58,0x4a,0x41,0x3b,0x31,0x27,0x21,0x19 |
95 | }; |
96 | |
97 | uint32 PSG_base; |
98 | |
99 | // $4010 - Frequency |
100 | // $4011 - Actual data outputted |
101 | // $4012 - Address register: $c000 + V*64 |
102 | // $4013 - Size register: Size in bytes = (V+1)*64 |
103 | |
104 | |
105 | static int64 PCMacc=0; |
106 | static int PCMfreq; |
107 | int32 PCMIRQCount; |
108 | uint8 PCMBitIndex=0; |
109 | uint32 PCMAddressIndex=0; |
110 | int32 PCMSizeIndex=0; |
9115e7d2 |
111 | uint8 PCMBuffer=0; |
c62d2810 |
112 | int vdis=0; |
113 | |
114 | static void Dummyfunc(void) {}; |
115 | |
116 | static void (*DoNoise)(void)=Dummyfunc; |
117 | static void (*DoTriangle)(void)=Dummyfunc; |
118 | static void (*DoPCM)(void)=Dummyfunc; |
119 | static void (*DoSQ1)(void)=Dummyfunc; |
120 | static void (*DoSQ2)(void)=Dummyfunc; |
121 | |
122 | static void CalcDPCMIRQ(void) |
123 | { |
124 | uint32 freq; |
125 | uint32 honk; |
126 | uint32 cycles; |
127 | |
128 | if(PAL) |
129 | freq=(PALPCMTable[PSG[0x10]&0xF]<<4); |
130 | else |
131 | freq=(NTSCPCMTable[PSG[0x10]&0xF]<<4); |
132 | |
133 | cycles=(((PSG[0x13]<<4)+1)); |
9115e7d2 |
134 | cycles*=freq/14; |
c62d2810 |
135 | honk=((PSG[0x13]<<4)+1)*freq; |
9115e7d2 |
136 | honk-=cycles; |
c62d2810 |
137 | //if(PAL) honk/=107; |
138 | //else honk/=(double)113.66666666; |
139 | PCMIRQCount=honk*48; |
140 | //PCMIRQCount=honk*3; //180; |
141 | //if(PAL) PCMIRQCount*=.93; |
142 | vdis=0; |
143 | } |
144 | |
145 | static void PrepDPCM() |
146 | { |
9115e7d2 |
147 | PCMAddressIndex=0x4000+(PSG[0x12]<<6); |
c62d2810 |
148 | PCMSizeIndex=(PSG[0x13]<<4)+1; |
9115e7d2 |
149 | PCMBitIndex=0; |
c62d2810 |
150 | //PCMBuffer=ARead[0x8000+PCMAddressIndex](0x8000+PCMAddressIndex); |
151 | if(PAL) |
152 | PCMfreq=PALPCMTable[PSG[0x10]&0xF]; |
153 | else |
154 | PCMfreq=NTSCPCMTable[PSG[0x10]&0xF]; |
155 | PCMacc=(int64)PCMfreq<<50; |
156 | } |
157 | |
158 | uint8 sweepon[2]={0,0}; |
159 | int32 curfreq[2]={0,0}; |
160 | |
161 | |
162 | uint8 SIRQStat=0; |
163 | |
164 | uint8 SweepCount[2]; |
165 | uint8 DecCountTo1[3]; |
166 | |
167 | uint8 fcnt=0; |
168 | int32 fhcnt=0; |
169 | int32 fhinc; |
170 | |
171 | static uint8 laster; |
172 | |
173 | /* Instantaneous? Maybe the new freq value is being calculated all of the time... */ |
174 | static int FASTAPASS(2) CheckFreq(uint32 cf, uint8 sr) |
175 | { |
176 | uint32 mod; |
177 | if(!(sr&0x8)) |
178 | { |
179 | mod=cf>>(sr&7); |
180 | if((mod+cf)&0x800) |
181 | return(0); |
182 | } |
183 | return(1); |
184 | } |
185 | |
186 | static DECLFW(Write0x11) |
187 | { |
188 | DoPCM(); |
189 | PSG[0x11]=V&0x7F; |
190 | } |
191 | |
192 | static uint8 DutyCount[2]={0,0}; |
193 | |
194 | static DECLFW(Write_PSG) |
195 | { |
196 | //if((A>=0x4004 && A<=0x4007) || A==0x4015) |
197 | //printf("$%04x:$%02x, %d\n",A,V,timestamp); |
198 | A&=0x1f; |
199 | switch(A) |
200 | { |
201 | case 0x0: |
202 | DoSQ1(); |
203 | if(V&0x10) |
204 | realvolume[0]=V&0xF; |
205 | break; |
206 | case 0x1: |
207 | sweepon[0]=V&0x80; |
208 | break; |
209 | case 0x2: |
210 | DoSQ1(); |
211 | curfreq[0]&=0xFF00; |
212 | curfreq[0]|=V; |
213 | break; |
9115e7d2 |
214 | case 0x3: |
c62d2810 |
215 | if(PSG[0x15]&1) |
216 | { |
217 | DoSQ1(); |
218 | lengthcount[0]=lengthtable[(V>>3)&0x1f]; |
9115e7d2 |
219 | sqnon|=1; |
c62d2810 |
220 | } |
221 | sweepon[0]=PSG[1]&0x80; |
222 | curfreq[0]=PSG[0x2]|((V&7)<<8); |
223 | decvolume[0]=0xF; |
224 | DecCountTo1[0]=(PSG[0]&0xF)+1; |
225 | SweepCount[0]=((PSG[0x1]>>4)&7)+1; |
226 | DutyCount[0]=0; |
227 | sqacc[0]=((int64)curfreq[0]+1)<<50; |
228 | break; |
229 | |
9115e7d2 |
230 | case 0x4: |
c62d2810 |
231 | DoSQ2(); |
232 | if(V&0x10) |
233 | realvolume[1]=V&0xF; |
234 | break; |
235 | case 0x5: |
236 | sweepon[1]=V&0x80; |
237 | break; |
238 | case 0x6: |
239 | DoSQ2(); |
240 | curfreq[1]&=0xFF00; |
241 | curfreq[1]|=V; |
242 | break; |
9115e7d2 |
243 | case 0x7: |
c62d2810 |
244 | if(PSG[0x15]&2) |
245 | { |
246 | DoSQ2(); |
247 | lengthcount[1]=lengthtable[(V>>3)&0x1f]; |
248 | sqnon|=2; |
249 | } |
250 | sweepon[1]=PSG[0x5]&0x80; |
9115e7d2 |
251 | curfreq[1]=PSG[0x6]|((V&7)<<8); |
c62d2810 |
252 | decvolume[1]=0xF; |
253 | DecCountTo1[1]=(PSG[0x4]&0xF)+1; |
254 | SweepCount[1]=((PSG[0x5]>>4)&7)+1; |
255 | DutyCount[1]=0; |
256 | sqacc[1]=((int64)curfreq[1]+1)<<50; |
257 | break; |
9115e7d2 |
258 | case 0x8: |
c62d2810 |
259 | DoTriangle(); |
260 | if(laster&0x80) |
261 | { |
262 | tricoop=V&0x7F; |
263 | trimode=V&0x80; |
264 | } |
265 | if(!(V&0x7F)) |
266 | tricoop=0; |
267 | laster=V&0x80; |
268 | break; |
269 | case 0xa:DoTriangle(); |
270 | break; |
271 | case 0xb: |
272 | if(PSG[0x15]&0x4) |
273 | { |
274 | DoTriangle(); |
275 | sqnon|=4; |
276 | lengthcount[2]=lengthtable[(V>>3)&0x1f]; |
277 | } |
278 | laster=0x80; |
279 | tricoop=PSG[0x8]&0x7f; |
280 | trimode=PSG[0x8]&0x80; |
281 | break; |
282 | case 0xC:DoNoise(); |
283 | if(V&0x10) |
284 | realvolume[2]=V&0xF; |
285 | break; |
286 | case 0xE:DoNoise();break; |
287 | case 0xF: |
288 | if(PSG[0x15]&8) |
289 | { |
290 | DoNoise(); |
291 | sqnon|=8; |
292 | lengthcount[3]=lengthtable[(V>>3)&0x1f]; |
293 | } |
294 | decvolume[2]=0xF; |
9115e7d2 |
295 | DecCountTo1[2]=(PSG[0xC]&0xF)+1; |
c62d2810 |
296 | break; |
297 | case 0x10:DoPCM(); |
298 | if(!(V&0x80)) |
299 | X6502_IRQEnd(FCEU_IQDPCM); |
300 | break; |
9115e7d2 |
301 | case 0x15: |
c62d2810 |
302 | { |
303 | int t=V^PSG[0x15]; |
304 | |
305 | if(t&1) |
306 | DoSQ1(); |
307 | if(t&2) |
308 | DoSQ2(); |
309 | if(t&4) |
310 | DoTriangle(); |
311 | if(t&8) |
312 | DoNoise(); |
313 | if(t&0x10) |
314 | DoPCM(); |
315 | sqnon&=V; |
316 | if(V&0x10) |
317 | { |
318 | if(!(PSG[0x15]&0x10)) |
319 | { |
320 | PrepDPCM(); |
321 | CalcDPCMIRQ(); |
322 | } |
323 | else if(vdis) |
324 | CalcDPCMIRQ(); |
325 | } |
326 | else |
327 | PCMIRQCount=0; |
328 | X6502_IRQEnd(FCEU_IQDPCM); |
329 | } |
330 | break; |
9115e7d2 |
331 | case 0x17: |
c62d2810 |
332 | V&=0xC0; |
9115e7d2 |
333 | fcnt=0; |
c62d2810 |
334 | if(V&0x80) |
335 | FrameSoundUpdate(); |
336 | fhcnt=fhinc; |
337 | X6502_IRQEnd(FCEU_IQFCOUNT); |
9115e7d2 |
338 | SIRQStat&=~0x40; |
c62d2810 |
339 | break; |
340 | } |
341 | PSG[A]=V; |
342 | } |
343 | |
344 | DECLFR(Read_PSG) |
345 | { |
346 | uint8 ret; |
347 | if(PSG[0x15]&0x10) |
348 | DoPCM(); |
349 | ret=(PSG[0x15]&(sqnon|0x10))|SIRQStat; |
350 | SIRQStat&=~0x40; |
351 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
352 | return ret; |
353 | } |
354 | |
355 | DECLFR(Read_PSGDummy) |
356 | { |
357 | uint8 ret; |
358 | |
359 | ret=(PSG[0x15]&sqnon)|SIRQStat; |
360 | SIRQStat&=~0x40; |
361 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
362 | return ret; |
363 | } |
364 | |
365 | static void FASTAPASS(1) FrameSoundStuff(int V) |
366 | { |
367 | int P; |
368 | |
369 | DoSQ1(); |
370 | DoSQ2(); |
371 | DoNoise(); |
372 | |
373 | switch((V&1)) |
374 | { |
375 | case 1: /* Envelope decay, linear counter, length counter, freq sweep */ |
376 | if(PSG[0x15]&4 && sqnon&4) |
377 | if(!(PSG[8]&0x80)) |
378 | { |
379 | if(lengthcount[2]>0) |
380 | { |
381 | lengthcount[2]--; |
382 | if(lengthcount[2]<=0) |
383 | { |
384 | DoTriangle(); |
385 | sqnon&=~4; |
386 | } |
9115e7d2 |
387 | } |
c62d2810 |
388 | } |
389 | |
390 | for(P=0;P<2;P++) |
391 | { |
392 | if(PSG[0x15]&(P+1) && sqnon&(P+1)) |
393 | { |
394 | if(!(PSG[P<<2]&0x20)) |
395 | { |
396 | if(lengthcount[P]>0) |
397 | { |
9115e7d2 |
398 | lengthcount[P]--; |
c62d2810 |
399 | if(lengthcount[P]<=0) |
400 | { |
401 | sqnon&=~(P+1); |
402 | } |
403 | } |
404 | } |
405 | } |
406 | /* Frequency Sweep Code Here */ |
407 | /* xxxx 0000 */ |
408 | /* xxxx = hz. 120/(x+1)*/ |
409 | if(sweepon[P]) |
410 | { |
411 | int32 mod=0; |
412 | |
9115e7d2 |
413 | if(SweepCount[P]>0) SweepCount[P]--; |
c62d2810 |
414 | if(SweepCount[P]<=0) |
415 | { |
416 | SweepCount[P]=((PSG[(P<<2)+0x1]>>4)&7)+1; //+1; |
417 | { |
418 | if(PSG[(P<<2)+0x1]&0x8) |
419 | { |
9115e7d2 |
420 | mod-=(P^1)+((curfreq[P])>>(PSG[(P<<2)+0x1]&7)); |
c62d2810 |
421 | |
422 | if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/) |
423 | { |
424 | curfreq[P]+=mod; |
425 | } |
426 | } |
427 | else |
428 | { |
429 | mod=curfreq[P]>>(PSG[(P<<2)+0x1]&7); |
430 | if((mod+curfreq[P])&0x800) |
431 | { |
432 | sweepon[P]=0; |
433 | curfreq[P]=0; |
434 | } |
435 | else |
436 | { |
437 | if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/) |
438 | { |
439 | curfreq[P]+=mod; |
440 | } |
441 | } |
442 | } |
443 | } |
444 | } |
9115e7d2 |
445 | } |
c62d2810 |
446 | } |
447 | |
448 | if(PSG[0x15]&0x8 && sqnon&8) |
449 | { |
450 | if(!(PSG[0xC]&0x20)) |
451 | { |
452 | if(lengthcount[3]>0) |
453 | { |
454 | lengthcount[3]--; |
455 | if(lengthcount[3]<=0) |
456 | { |
457 | sqnon&=~8; |
458 | } |
459 | } |
460 | } |
461 | } |
462 | |
463 | case 0: /* Envelope decay + linear counter */ |
464 | if(!trimode) |
9115e7d2 |
465 | { |
c62d2810 |
466 | laster=0; |
467 | if(tricoop) |
468 | { |
469 | if(tricoop==1) DoTriangle(); |
470 | tricoop--; |
471 | } |
472 | } |
473 | |
474 | for(P=0;P<2;P++) |
475 | { |
476 | if(DecCountTo1[P]>0) DecCountTo1[P]--; |
477 | if(DecCountTo1[P]<=0) |
478 | { |
479 | DecCountTo1[P]=(PSG[P<<2]&0xF)+1; |
480 | if(decvolume[P] || PSG[P<<2]&0x20) |
481 | { |
482 | decvolume[P]--; |
483 | /* Step from 0 to full volume seems to take twice as long |
484 | as the other steps. I don't know if this is the correct |
485 | way to double its length, though(or if it even matters). |
486 | */ |
487 | if((PSG[P<<2]&0x20) && (decvolume[P]==0)) |
488 | DecCountTo1[P]<<=1; |
489 | decvolume[P]&=15; |
490 | } |
491 | } |
492 | if(!(PSG[P<<2]&0x10)) |
493 | realvolume[P]=decvolume[P]; |
494 | } |
495 | |
496 | if(DecCountTo1[2]>0) DecCountTo1[2]--; |
497 | if(DecCountTo1[2]<=0) |
498 | { |
499 | DecCountTo1[2]=(PSG[0xC]&0xF)+1; |
500 | if(decvolume[2] || PSG[0xC]&0x20) |
501 | { |
502 | decvolume[2]--; |
503 | /* Step from 0 to full volume seems to take twice as long |
504 | as the other steps. I don't know if this is the correct |
505 | way to double its length, though(or if it even matters). |
506 | */ |
507 | if((PSG[0xC]&0x20) && (decvolume[2]==0)) |
508 | DecCountTo1[2]<<=1; |
509 | decvolume[2]&=15; |
510 | } |
511 | } |
512 | if(!(PSG[0xC]&0x10)) |
513 | realvolume[2]=decvolume[2]; |
514 | |
515 | break; |
516 | } |
517 | |
518 | } |
519 | |
520 | void FrameSoundUpdate(void) |
521 | { |
522 | // Linear counter: Bit 0-6 of $4008 |
523 | // Length counter: Bit 4-7 of $4003, $4007, $400b, $400f |
524 | |
525 | if(fcnt==3) |
526 | { |
527 | if(PSG[0x17]&0x80) |
528 | fhcnt+=fhinc; |
529 | if(!(PSG[0x17]&0xC0)) |
530 | { |
531 | SIRQStat|=0x40; |
532 | X6502_IRQBegin(FCEU_IQFCOUNT); |
533 | } |
534 | } |
535 | //if(SIRQStat&0x40) X6502_IRQBegin(FCEU_IQFCOUNT); |
536 | FrameSoundStuff(fcnt); |
537 | fcnt=(fcnt+1)&3; |
538 | } |
539 | |
540 | static uint32 ChannelBC[5]; |
541 | |
542 | static uint32 RectAmp[2][8]; |
543 | |
544 | static void FASTAPASS(1) CalcRectAmp(int P) |
545 | { |
546 | static int tal[4]={1,2,4,6}; |
547 | int V; |
548 | int x; |
549 | uint32 *b=RectAmp[P]; |
550 | int m; |
551 | |
552 | //if(PSG[P<<2]&0x10) |
553 | V=realvolume[P]<<4; |
554 | //V=(PSG[P<<2]&15)<<4; |
555 | //else |
556 | // V=decvolume[P]<<4; |
557 | m=tal[(PSG[P<<2]&0xC0)>>6]; |
558 | for(x=0;x<m;x++,b++) |
559 | *b=0; |
560 | for(;x<8;x++,b++) |
561 | *b=V; |
562 | } |
563 | |
564 | static void RDoPCM(void) |
565 | { |
566 | int32 V; |
567 | int32 start,end; |
568 | int64 freq; |
569 | uint32 out=PSG[0x11]<<3; |
570 | |
571 | start=ChannelBC[4]; |
9115e7d2 |
572 | end=(timestamp<<16)/soundtsinc; |
c62d2810 |
573 | if(end<=start) return; |
574 | ChannelBC[4]=end; |
575 | |
576 | if(PSG[0x15]&0x10) |
577 | { |
578 | freq=PCMfreq; |
579 | freq<<=50; |
580 | |
581 | for(V=start;V<end;V++) |
582 | { |
583 | PCMacc-=nesincsizeLL; |
584 | if(PCMacc<=0) |
585 | { |
586 | if(!PCMBitIndex) |
587 | { |
588 | PCMSizeIndex--; |
589 | if(!PCMSizeIndex) |
590 | { |
591 | if(PSG[0x10]&0x40) |
592 | PrepDPCM(); |
593 | else |
594 | { |
595 | PSG[0x15]&=~0x10; |
596 | for(;V<end;V++) |
597 | Wave[V>>4]+=PSG[0x11]<<3; |
598 | goto endopcmo; |
599 | } |
600 | } |
601 | else |
602 | { |
603 | PCMBuffer=ARead[0x8000+PCMAddressIndex](0x8000+PCMAddressIndex); |
604 | PCMAddressIndex=(PCMAddressIndex+1)&0x7fff; |
605 | } |
606 | } |
607 | |
608 | { |
609 | int t=(((PCMBuffer>>PCMBitIndex)&1)<<2)-2; |
610 | uint8 bah=PSG[0x11]; |
611 | |
612 | PCMacc+=freq; |
613 | PSG[0x11]+=t; |
614 | if(PSG[0x11]&0x80) |
615 | PSG[0x11]=bah; |
616 | else |
617 | out=PSG[0x11]<<3; |
618 | } |
619 | PCMBitIndex=(PCMBitIndex+1)&7; |
620 | } |
621 | Wave[V>>4]+=out; //(PSG[0x11]-64)<<3; |
622 | } |
623 | } |
624 | else |
625 | { |
626 | if((end-start)>64) |
627 | { |
628 | for(V=start;V<=(start|15);V++) |
629 | Wave[V>>4]+=out; |
630 | out<<=4; |
631 | for(V=(start>>4)+1;V<(end>>4);V++) |
632 | Wave[V]+=out; |
633 | out>>=4; |
634 | for(V=end&(~15);V<end;V++) |
635 | Wave[V>>4]+=out; |
636 | } |
637 | else |
638 | for(V=start;V<end;V++) |
639 | Wave[V>>4]+=out; |
640 | } |
641 | endopcmo:; |
642 | } |
643 | |
644 | static void RDoSQ1(void) |
645 | { |
646 | int32 V; |
647 | int32 start,end; |
648 | int64 freq; |
649 | |
650 | CalcRectAmp(0); |
651 | start=ChannelBC[0]; |
652 | end=(timestamp<<16)/soundtsinc; |
653 | if(end<=start) return; |
654 | ChannelBC[0]=end; |
655 | |
656 | if(curfreq[0]<8 || curfreq[0]>0x7ff) |
657 | return; |
658 | if(!CheckFreq(curfreq[0],PSG[0x1])) |
659 | return; |
660 | |
661 | if(PSG[0x15]&1 && sqnon&1) |
662 | { |
663 | uint32 out=RectAmp[0][DutyCount[0]]; |
664 | freq=curfreq[0]+1; |
665 | { |
666 | freq<<=50; |
667 | for(V=start;V<end;V++) |
668 | { |
669 | Wave[V>>4]+=out; |
670 | sqacc[0]-=nesincsizeLL; |
671 | if(sqacc[0]<=0) |
672 | { |
673 | rea: |
674 | sqacc[0]+=freq; |
675 | DutyCount[0]++; |
676 | if(sqacc[0]<=0) goto rea; |
677 | |
678 | DutyCount[0]&=7; |
679 | out=RectAmp[0][DutyCount[0]]; |
680 | } |
681 | |
682 | } |
683 | } |
684 | } |
685 | } |
686 | |
687 | static void RDoSQ2(void) |
688 | { |
689 | int32 V; |
690 | int32 start,end; |
691 | int64 freq; |
692 | |
693 | CalcRectAmp(1); |
694 | start=ChannelBC[1]; |
695 | end=(timestamp<<16)/soundtsinc; |
696 | if(end<=start) return; |
697 | ChannelBC[1]=end; |
698 | |
699 | if(curfreq[1]<8 || curfreq[1]>0x7ff) |
700 | return; |
701 | if(!CheckFreq(curfreq[1],PSG[0x5])) |
702 | return; |
703 | |
704 | if(PSG[0x15]&2 && sqnon&2) |
705 | { |
706 | uint32 out=RectAmp[1][DutyCount[1]]; |
707 | freq=curfreq[1]+1; |
708 | |
709 | { |
710 | freq<<=50; |
711 | for(V=start;V<end;V++) |
712 | { |
713 | Wave[V>>4]+=out; |
714 | sqacc[1]-=nesincsizeLL; |
715 | if(sqacc[1]<=0) |
716 | { |
717 | rea: |
718 | sqacc[1]+=freq; |
719 | DutyCount[1]++; |
720 | if(sqacc[1]<=0) goto rea; |
721 | |
722 | DutyCount[1]&=7; |
723 | out=RectAmp[1][DutyCount[1]]; |
724 | } |
725 | |
726 | } |
727 | } |
728 | } |
729 | } |
730 | |
731 | |
732 | static void RDoTriangle(void) |
733 | { |
734 | static uint32 tcout=0; |
735 | int32 V; |
736 | int32 start,end; //,freq; |
737 | int64 freq=(((PSG[0xa]|((PSG[0xb]&7)<<8))+1)); |
738 | |
739 | start=ChannelBC[2]; |
9115e7d2 |
740 | end=(timestamp<<16)/soundtsinc; |
c62d2810 |
741 | if(end<=start) return; |
742 | ChannelBC[2]=end; |
743 | |
744 | if(! (PSG[0x15]&0x4 && sqnon&4 && tricoop) ) |
745 | { // Counter is halted, but we still need to output. |
746 | for(V=start;V<end;V++) |
747 | Wave[V>>4]+=tcout; |
748 | } |
749 | else if(freq<=4) // 55.9Khz - Might be barely audible on a real NES, but |
750 | // it's too costly to generate audio at this high of a frequency |
751 | // (55.9Khz * 32 for the stepping). |
752 | // The same could probably be said for ~27.8Khz, so we'll |
753 | // take care of that too. We'll just output the average |
754 | // value(15/2 - scaled properly for our output format, of course). |
755 | // We'll also take care of ~18Khz and ~14Khz too, since they should be barely audible. |
756 | // (Some proof or anything to confirm/disprove this would be nice.). |
757 | { |
758 | for(V=start;V<end;V++) |
759 | Wave[V>>4]+=((0xF<<4)+(0xF<<2))>>1; |
760 | } |
761 | else |
762 | { |
9115e7d2 |
763 | static int64 triacc=0; |
764 | static uint8 tc=0; |
c62d2810 |
765 | |
766 | freq<<=49; |
767 | for(V=start;V<end;V++) |
768 | { |
769 | triacc-=nesincsizeLL; |
770 | if(triacc<=0) |
771 | { |
772 | rea: |
773 | triacc+=freq; //t; |
774 | tc=(tc+1)&0x1F; |
775 | if(triacc<=0) goto rea; |
776 | |
777 | tcout=(tc&0xF); |
778 | if(tc&0x10) tcout^=0xF; |
779 | tcout=(tcout<<4)+(tcout<<2); |
780 | } |
781 | Wave[V>>4]+=tcout; |
782 | } |
783 | } |
784 | } |
785 | |
786 | static void RDoNoise(void) |
787 | { |
788 | int32 inc,V; |
789 | int32 start,end; |
790 | |
791 | start=ChannelBC[3]; |
9115e7d2 |
792 | end=(timestamp<<16)/soundtsinc; |
c62d2810 |
793 | if(end<=start) return; |
794 | ChannelBC[3]=end; |
795 | |
796 | if(PSG[0x15]&0x8 && sqnon&8) |
797 | { |
798 | uint32 outo; |
799 | uint32 amptab[2]; |
800 | uint8 amplitude; |
9115e7d2 |
801 | |
c62d2810 |
802 | amplitude=realvolume[2]; |
803 | //if(PSG[0xC]&0x10) |
804 | // amplitude=(PSG[0xC]&0xF); |
9115e7d2 |
805 | //else |
c62d2810 |
806 | // amplitude=decvolume[2]&0xF; |
807 | |
9115e7d2 |
808 | inc=NoiseFreqTable[PSG[0xE]&0xF]; |
c62d2810 |
809 | amptab[0]=((amplitude<<2)+amplitude+amplitude)<<1; |
810 | amptab[1]=0; |
811 | outo=amptab[nreg&1]; |
812 | |
9115e7d2 |
813 | if(amplitude) |
c62d2810 |
814 | { |
9115e7d2 |
815 | if(PSG[0xE]&0x80) // "short" noise |
c62d2810 |
816 | for(V=start;V<end;V++) |
9115e7d2 |
817 | { |
c62d2810 |
818 | Wave[V>>4]+=outo; |
819 | if(count[3]>=inc) |
9115e7d2 |
820 | { |
821 | uint8 feedback; |
c62d2810 |
822 | |
823 | feedback=((nreg>>8)&1)^((nreg>>14)&1); |
824 | nreg=(nreg<<1)+feedback; |
825 | nreg&=0x7fff; |
826 | outo=amptab[nreg&1]; |
827 | count[3]-=inc; |
828 | } |
829 | count[3]+=0x1000; |
830 | } |
831 | else |
832 | for(V=start;V<end;V++) |
833 | { |
834 | Wave[V>>4]+=outo; |
835 | if(count[3]>=inc) |
836 | { |
837 | uint8 feedback; |
838 | |
839 | feedback=((nreg>>13)&1)^((nreg>>14)&1); |
840 | nreg=(nreg<<1)+feedback; |
841 | nreg&=0x7fff; |
842 | outo=amptab[nreg&1]; |
843 | count[3]-=inc; |
844 | } |
845 | count[3]+=0x1000; |
846 | } |
847 | } |
848 | |
849 | } |
850 | } |
851 | |
852 | void SetNESSoundMap(void) |
9115e7d2 |
853 | { |
c62d2810 |
854 | SetWriteHandler(0x4000,0x4013,Write_PSG); |
855 | SetWriteHandler(0x4011,0x4011,Write0x11); |
856 | SetWriteHandler(0x4015,0x4015,Write_PSG); |
9115e7d2 |
857 | SetWriteHandler(0x4017,0x4017,Write_PSG); |
c62d2810 |
858 | SetReadHandler(0x4015,0x4015,Read_PSG); |
859 | } |
860 | |
861 | static int32 WaveNSF[256]; |
862 | |
9115e7d2 |
863 | int32 highp; // 0 through 65536, 0 = no high pass, 65536 = max high pass |
c62d2810 |
864 | |
9115e7d2 |
865 | int32 lowp; // 0 through 65536, 65536 = max low pass(total attenuation) |
c62d2810 |
866 | // 65536 = no low pass |
5232c20c |
867 | static void FilterSound(uint32 *in, int32 *out, int16 *outMono, int count) |
c62d2810 |
868 | { |
869 | static int64 acc=0, acc2=0; |
5232c20c |
870 | //int index=0; |
871 | //int16* tmp; |
872 | //int16* outorig=out; |
873 | //int32 prev=-99999; |
9115e7d2 |
874 | for(;count;count--,in++)//,out++)//,index++) |
c62d2810 |
875 | { |
876 | int64 diff; |
877 | |
878 | diff=((int64)*in<<24)-acc; |
879 | |
880 | acc+=(diff*highp)>>16; |
881 | acc2+=((diff-acc2)*lowp)>>16; |
882 | *in=0; |
9115e7d2 |
883 | |
5232c20c |
884 | // don't change the sound here |
885 | // *out=(acc2*(int64)FSettings.SoundVolume)>>(24+16); |
886 | // volume, 4 times louder by default?? |
887 | // *out = acc2 >> 24; |
888 | // just a bit louder. Hope it's okay |
889 | /* |
890 | *out = acc2 >> 22; |
c62d2810 |
891 | if(*out<-32767) *out=-32767; |
892 | if(*out>32767) *out=32767; |
5232c20c |
893 | // go one back |
9115e7d2 |
894 | |
5232c20c |
895 | // do MONO |
9115e7d2 |
896 | tmp=(int16 *)(out-1); |
5232c20c |
897 | // don't do this the first time |
898 | if (prev == -99999) continue; |
899 | // the middle one should be interpolated |
9115e7d2 |
900 | tmp[1]=(int16)((*out + prev) >> 1); |
901 | prev = *out; |
5232c20c |
902 | */ |
903 | //outMono[index] = (int16)*out; |
904 | *outMono = (int16)(acc2 >> 24); |
905 | //if(*outMono<-16384) *outMono=-16384; |
906 | //if(*outMono>16384) *outMono=16384; |
907 | outMono++; |
9115e7d2 |
908 | |
5232c20c |
909 | // out=((int64)(acc2>>24)*(int64)FSettings.SoundVolume)>>16; //acc2>>24; |
9115e7d2 |
910 | |
c62d2810 |
911 | } |
5232c20c |
912 | // do one more |
c62d2810 |
913 | } |
914 | |
5232c20c |
915 | |
916 | |
917 | |
c62d2810 |
918 | int FlushEmulateSound(void) |
919 | { |
920 | uint32 end; |
921 | int x; |
922 | |
5232c20c |
923 | |
c62d2810 |
924 | if(!timestamp) return(0); |
925 | |
5232c20c |
926 | if(!FSettings.SndRate || (soundvol == 0)) |
c62d2810 |
927 | { |
928 | end=0; |
929 | goto nosoundo; |
930 | } |
931 | |
932 | end=(timestamp<<16)/soundtsinc; |
933 | DoSQ1(); |
934 | DoSQ2(); |
935 | DoTriangle(); |
936 | DoNoise(); |
937 | DoPCM(); |
938 | |
939 | if(GameExpSound.Fill) |
940 | GameExpSound.Fill(end&0xF); |
941 | |
5232c20c |
942 | // FilterSound(Wave,WaveFinal,end>>4); |
943 | FilterSound(Wave,WaveFinal,WaveFinalMono,end>>4); |
944 | // printf("count %d, num ints %d\n", end, (end >> 4)); |
c62d2810 |
945 | if(FCEUGameInfo.type==GIT_NSF) |
946 | { |
5232c20c |
947 | printf("IS NSF"); |
c62d2810 |
948 | int x,s=0,si=end/1024; // Only want 1/4 of the output buffer to be displayed |
949 | for(x=0;x<256;x++) |
950 | { |
951 | WaveNSF[x]=WaveFinal[s>>4]; |
952 | s+=si; |
953 | } |
954 | } |
955 | |
956 | if(end&0xF) |
957 | Wave[0]=Wave[(end>>4)]; |
9115e7d2 |
958 | Wave[(end>>4)]=0; |
c62d2810 |
959 | |
960 | nosoundo: |
961 | for(x=0;x<5;x++) |
962 | ChannelBC[x]=end&0xF; |
963 | timestampbase+=timestamp; |
9115e7d2 |
964 | timestamp=(soundtsinc*(end&0xF))>>16; |
c62d2810 |
965 | timestampbase-=timestamp; |
966 | return(end>>4); |
967 | } |
968 | |
969 | void GetSoundBuffer(int32 **W) |
970 | { |
971 | *W=WaveNSF; |
972 | } |
973 | |
974 | void PowerSound(void) |
975 | { |
976 | int x; |
977 | |
978 | SetNESSoundMap(); |
979 | |
980 | for(x=0;x<0x16;x++) |
981 | if(x!=0x14) |
982 | BWrite[0x4000+x](0x4000+x,0); |
983 | PSG[0x17]=0; //x40; |
984 | fhcnt=fhinc; |
985 | fcnt=0; |
986 | nreg=1; |
987 | } |
988 | |
989 | void ResetSound(void) |
990 | { |
991 | int x; |
992 | for(x=0;x<0x16;x++) |
993 | if(x!=1 && x!=5 && x!=0x14) BWrite[0x4000+x](0x4000+x,0); |
994 | PSG[0x17]=0; |
995 | fhcnt=fhinc; |
996 | fcnt=0; |
997 | nreg=1; |
998 | } |
999 | |
1000 | void SetSoundVariables(void) |
1001 | { |
9115e7d2 |
1002 | int x; |
c62d2810 |
1003 | |
1004 | fhinc=PAL?16626:14915; // *2 CPU clock rate |
1005 | fhinc*=24; |
1006 | for(x=0;x<0x20;x++) |
1007 | lengthtable[x]=Slengthtable[x]<<1; |
1008 | |
1009 | if(FSettings.SndRate) |
1010 | { |
1011 | DoNoise=RDoNoise; |
1012 | DoTriangle=RDoTriangle; |
1013 | DoPCM=RDoPCM; |
1014 | DoSQ1=RDoSQ1; |
1015 | DoSQ2=RDoSQ2; |
9115e7d2 |
1016 | } |
c62d2810 |
1017 | else |
1018 | { |
1019 | DoNoise=DoTriangle=DoPCM=DoSQ1=DoSQ2=Dummyfunc; |
1020 | } |
1021 | |
1022 | if(!FSettings.SndRate) return; |
1023 | if(GameExpSound.RChange) |
1024 | GameExpSound.RChange(); |
1025 | |
1026 | nesincsizeLL=(int64)((int64)562949953421312*(long double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate OVERSAMPLE)); |
1027 | PSG_base=(uint32)(PAL?(long double)PAL_CPU/16:(long double)NTSC_CPU/16); |
1028 | |
1029 | for(x=0;x<0x10;x++) |
1030 | { |
1031 | long double z; |
1032 | z=SNoiseFreqTable[x]<<1; |
1033 | z=(PAL?PAL_CPU:NTSC_CPU)/z; |
1034 | z=(long double)((uint32)((FSettings.SndRate OVERSAMPLE)<<12))/z; |
1035 | NoiseFreqTable[x]=z; |
1036 | } |
1037 | soundtsinc=(uint32)((uint64)(PAL?(long double)PAL_CPU*65536:(long double)NTSC_CPU*65536)/(FSettings.SndRate OVERSAMPLE)); |
1038 | memset(Wave,0,2048*4); |
1039 | for(x=0;x<5;x++) |
1040 | ChannelBC[x]=0; |
1041 | highp=(250<<16)/FSettings.SndRate; // Arbitrary |
1042 | lowp=((int64)25000<<16)/FSettings.SndRate; // Arbitrary |
1043 | |
1044 | if(highp>(1<<16)) highp=1<<16; |
1045 | if(lowp>(1<<16)) lowp=1<<16; |
1046 | } |
1047 | |
1048 | void FixOldSaveStateSFreq(void) |
1049 | { |
1050 | int x; |
1051 | for(x=0;x<2;x++) |
1052 | { |
1053 | curfreq[x]=PSG[0x2+(x<<2)]|((PSG[0x3+(x<<2)]&7)<<8); |
1054 | } |
1055 | } |
1056 | |
1057 | void FCEUI_Sound(int Rate) |
1058 | { |
1059 | FSettings.SndRate=Rate; |
1060 | SetSoundVariables(); |
1061 | } |
1062 | |
1063 | void FCEUI_SetSoundVolume(uint32 volume) |
1064 | { |
1065 | FSettings.SoundVolume=(volume<<16)/100; |
1066 | } |