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 | |
4fdfab07 |
62 | uint32 soundtsoffs=0; |
63 | |
c62d2810 |
64 | #undef printf |
65 | uint16 nreg; |
9115e7d2 |
66 | |
67 | int32 lengthcount[4]; |
c62d2810 |
68 | |
5232c20c |
69 | extern int soundvol; |
70 | |
c62d2810 |
71 | static const uint8 Slengthtable[0x20]= |
72 | { |
73 | 0x5,0x7f,0xA,0x1,0x14,0x2,0x28,0x3,0x50,0x4,0x1E,0x5,0x7,0x6,0x0E,0x7, |
74 | 0x6,0x08,0xC,0x9,0x18,0xa,0x30,0xb,0x60,0xc,0x24,0xd,0x8,0xe,0x10,0xf |
75 | }; |
76 | |
77 | static uint32 lengthtable[0x20]; |
78 | |
79 | static const uint32 SNoiseFreqTable[0x10]= |
80 | { |
81 | 2,4,8,0x10,0x20,0x30,0x40,0x50,0x65,0x7f,0xbe,0xfe,0x17d,0x1fc,0x3f9,0x7f2 |
82 | }; |
83 | static uint32 NoiseFreqTable[0x10]; |
84 | |
85 | int64 nesincsizeLL; |
d97315ac |
86 | int64 nesincsize; |
c62d2810 |
87 | |
88 | static const uint8 NTSCPCMTable[0x10]= |
89 | { |
90 | 0xd6,0xbe,0xaa,0xa0,0x8f,0x7f,0x71,0x6b, |
91 | 0x5f,0x50,0x47,0x40,0x35,0x2a,0x24,0x1b |
92 | }; |
93 | |
94 | static const uint8 PALPCMTable[0x10]= // These values are just guessed. |
95 | { |
96 | 0xc6,0xb0,0x9d,0x94,0x84,0x75,0x68,0x63, |
97 | 0x58,0x4a,0x41,0x3b,0x31,0x27,0x21,0x19 |
98 | }; |
99 | |
100 | uint32 PSG_base; |
101 | |
102 | // $4010 - Frequency |
103 | // $4011 - Actual data outputted |
104 | // $4012 - Address register: $c000 + V*64 |
105 | // $4013 - Size register: Size in bytes = (V+1)*64 |
106 | |
107 | |
108 | static int64 PCMacc=0; |
109 | static int PCMfreq; |
110 | int32 PCMIRQCount; |
111 | uint8 PCMBitIndex=0; |
112 | uint32 PCMAddressIndex=0; |
113 | int32 PCMSizeIndex=0; |
9115e7d2 |
114 | uint8 PCMBuffer=0; |
c62d2810 |
115 | int vdis=0; |
116 | |
117 | static void Dummyfunc(void) {}; |
118 | |
119 | static void (*DoNoise)(void)=Dummyfunc; |
120 | static void (*DoTriangle)(void)=Dummyfunc; |
121 | static void (*DoPCM)(void)=Dummyfunc; |
122 | static void (*DoSQ1)(void)=Dummyfunc; |
123 | static void (*DoSQ2)(void)=Dummyfunc; |
124 | |
125 | static void CalcDPCMIRQ(void) |
126 | { |
127 | uint32 freq; |
128 | uint32 honk; |
129 | uint32 cycles; |
130 | |
131 | if(PAL) |
132 | freq=(PALPCMTable[PSG[0x10]&0xF]<<4); |
133 | else |
134 | freq=(NTSCPCMTable[PSG[0x10]&0xF]<<4); |
135 | |
136 | cycles=(((PSG[0x13]<<4)+1)); |
9115e7d2 |
137 | cycles*=freq/14; |
c62d2810 |
138 | honk=((PSG[0x13]<<4)+1)*freq; |
9115e7d2 |
139 | honk-=cycles; |
c62d2810 |
140 | //if(PAL) honk/=107; |
141 | //else honk/=(double)113.66666666; |
142 | PCMIRQCount=honk*48; |
143 | //PCMIRQCount=honk*3; //180; |
144 | //if(PAL) PCMIRQCount*=.93; |
145 | vdis=0; |
146 | } |
147 | |
148 | static void PrepDPCM() |
149 | { |
9115e7d2 |
150 | PCMAddressIndex=0x4000+(PSG[0x12]<<6); |
c62d2810 |
151 | PCMSizeIndex=(PSG[0x13]<<4)+1; |
9115e7d2 |
152 | PCMBitIndex=0; |
c62d2810 |
153 | //PCMBuffer=ARead[0x8000+PCMAddressIndex](0x8000+PCMAddressIndex); |
154 | if(PAL) |
155 | PCMfreq=PALPCMTable[PSG[0x10]&0xF]; |
156 | else |
157 | PCMfreq=NTSCPCMTable[PSG[0x10]&0xF]; |
158 | PCMacc=(int64)PCMfreq<<50; |
159 | } |
160 | |
161 | uint8 sweepon[2]={0,0}; |
162 | int32 curfreq[2]={0,0}; |
163 | |
164 | |
165 | uint8 SIRQStat=0; |
166 | |
167 | uint8 SweepCount[2]; |
168 | uint8 DecCountTo1[3]; |
169 | |
170 | uint8 fcnt=0; |
171 | int32 fhcnt=0; |
172 | int32 fhinc; |
173 | |
174 | static uint8 laster; |
175 | |
176 | /* Instantaneous? Maybe the new freq value is being calculated all of the time... */ |
177 | static int FASTAPASS(2) CheckFreq(uint32 cf, uint8 sr) |
178 | { |
179 | uint32 mod; |
180 | if(!(sr&0x8)) |
181 | { |
182 | mod=cf>>(sr&7); |
183 | if((mod+cf)&0x800) |
184 | return(0); |
185 | } |
186 | return(1); |
187 | } |
188 | |
189 | static DECLFW(Write0x11) |
190 | { |
191 | DoPCM(); |
192 | PSG[0x11]=V&0x7F; |
193 | } |
194 | |
195 | static uint8 DutyCount[2]={0,0}; |
196 | |
197 | static DECLFW(Write_PSG) |
198 | { |
199 | //if((A>=0x4004 && A<=0x4007) || A==0x4015) |
4fdfab07 |
200 | //printf("$%04x:$%02x, %d\n",A,V,SOUNDTS); |
c62d2810 |
201 | A&=0x1f; |
202 | switch(A) |
203 | { |
204 | case 0x0: |
205 | DoSQ1(); |
206 | if(V&0x10) |
207 | realvolume[0]=V&0xF; |
208 | break; |
209 | case 0x1: |
210 | sweepon[0]=V&0x80; |
211 | break; |
212 | case 0x2: |
213 | DoSQ1(); |
214 | curfreq[0]&=0xFF00; |
215 | curfreq[0]|=V; |
216 | break; |
9115e7d2 |
217 | case 0x3: |
c62d2810 |
218 | if(PSG[0x15]&1) |
219 | { |
220 | DoSQ1(); |
221 | lengthcount[0]=lengthtable[(V>>3)&0x1f]; |
9115e7d2 |
222 | sqnon|=1; |
c62d2810 |
223 | } |
224 | sweepon[0]=PSG[1]&0x80; |
225 | curfreq[0]=PSG[0x2]|((V&7)<<8); |
226 | decvolume[0]=0xF; |
227 | DecCountTo1[0]=(PSG[0]&0xF)+1; |
228 | SweepCount[0]=((PSG[0x1]>>4)&7)+1; |
229 | DutyCount[0]=0; |
230 | sqacc[0]=((int64)curfreq[0]+1)<<50; |
231 | break; |
232 | |
9115e7d2 |
233 | case 0x4: |
c62d2810 |
234 | DoSQ2(); |
235 | if(V&0x10) |
236 | realvolume[1]=V&0xF; |
237 | break; |
238 | case 0x5: |
239 | sweepon[1]=V&0x80; |
240 | break; |
241 | case 0x6: |
242 | DoSQ2(); |
243 | curfreq[1]&=0xFF00; |
244 | curfreq[1]|=V; |
245 | break; |
9115e7d2 |
246 | case 0x7: |
c62d2810 |
247 | if(PSG[0x15]&2) |
248 | { |
249 | DoSQ2(); |
250 | lengthcount[1]=lengthtable[(V>>3)&0x1f]; |
251 | sqnon|=2; |
252 | } |
253 | sweepon[1]=PSG[0x5]&0x80; |
9115e7d2 |
254 | curfreq[1]=PSG[0x6]|((V&7)<<8); |
c62d2810 |
255 | decvolume[1]=0xF; |
256 | DecCountTo1[1]=(PSG[0x4]&0xF)+1; |
257 | SweepCount[1]=((PSG[0x5]>>4)&7)+1; |
258 | DutyCount[1]=0; |
259 | sqacc[1]=((int64)curfreq[1]+1)<<50; |
260 | break; |
9115e7d2 |
261 | case 0x8: |
c62d2810 |
262 | DoTriangle(); |
263 | if(laster&0x80) |
264 | { |
265 | tricoop=V&0x7F; |
266 | trimode=V&0x80; |
267 | } |
268 | if(!(V&0x7F)) |
269 | tricoop=0; |
270 | laster=V&0x80; |
271 | break; |
272 | case 0xa:DoTriangle(); |
273 | break; |
274 | case 0xb: |
275 | if(PSG[0x15]&0x4) |
276 | { |
277 | DoTriangle(); |
278 | sqnon|=4; |
279 | lengthcount[2]=lengthtable[(V>>3)&0x1f]; |
280 | } |
281 | laster=0x80; |
282 | tricoop=PSG[0x8]&0x7f; |
283 | trimode=PSG[0x8]&0x80; |
284 | break; |
285 | case 0xC:DoNoise(); |
286 | if(V&0x10) |
287 | realvolume[2]=V&0xF; |
288 | break; |
289 | case 0xE:DoNoise();break; |
290 | case 0xF: |
291 | if(PSG[0x15]&8) |
292 | { |
293 | DoNoise(); |
294 | sqnon|=8; |
295 | lengthcount[3]=lengthtable[(V>>3)&0x1f]; |
296 | } |
297 | decvolume[2]=0xF; |
9115e7d2 |
298 | DecCountTo1[2]=(PSG[0xC]&0xF)+1; |
c62d2810 |
299 | break; |
300 | case 0x10:DoPCM(); |
301 | if(!(V&0x80)) |
302 | X6502_IRQEnd(FCEU_IQDPCM); |
303 | break; |
9115e7d2 |
304 | case 0x15: |
c62d2810 |
305 | { |
306 | int t=V^PSG[0x15]; |
307 | |
308 | if(t&1) |
309 | DoSQ1(); |
310 | if(t&2) |
311 | DoSQ2(); |
312 | if(t&4) |
313 | DoTriangle(); |
314 | if(t&8) |
315 | DoNoise(); |
316 | if(t&0x10) |
317 | DoPCM(); |
318 | sqnon&=V; |
319 | if(V&0x10) |
320 | { |
321 | if(!(PSG[0x15]&0x10)) |
322 | { |
323 | PrepDPCM(); |
324 | CalcDPCMIRQ(); |
325 | } |
326 | else if(vdis) |
327 | CalcDPCMIRQ(); |
328 | } |
329 | else |
330 | PCMIRQCount=0; |
331 | X6502_IRQEnd(FCEU_IQDPCM); |
332 | } |
333 | break; |
c62d2810 |
334 | } |
335 | PSG[A]=V; |
336 | } |
337 | |
338 | DECLFR(Read_PSG) |
339 | { |
340 | uint8 ret; |
341 | if(PSG[0x15]&0x10) |
342 | DoPCM(); |
343 | ret=(PSG[0x15]&(sqnon|0x10))|SIRQStat; |
344 | SIRQStat&=~0x40; |
345 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
346 | return ret; |
347 | } |
348 | |
349 | DECLFR(Read_PSGDummy) |
350 | { |
351 | uint8 ret; |
352 | |
353 | ret=(PSG[0x15]&sqnon)|SIRQStat; |
354 | SIRQStat&=~0x40; |
355 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
356 | return ret; |
357 | } |
358 | |
359 | static void FASTAPASS(1) FrameSoundStuff(int V) |
360 | { |
361 | int P; |
362 | |
363 | DoSQ1(); |
364 | DoSQ2(); |
365 | DoNoise(); |
366 | |
367 | switch((V&1)) |
368 | { |
369 | case 1: /* Envelope decay, linear counter, length counter, freq sweep */ |
370 | if(PSG[0x15]&4 && sqnon&4) |
371 | if(!(PSG[8]&0x80)) |
372 | { |
373 | if(lengthcount[2]>0) |
374 | { |
375 | lengthcount[2]--; |
376 | if(lengthcount[2]<=0) |
377 | { |
378 | DoTriangle(); |
379 | sqnon&=~4; |
380 | } |
9115e7d2 |
381 | } |
c62d2810 |
382 | } |
383 | |
384 | for(P=0;P<2;P++) |
385 | { |
386 | if(PSG[0x15]&(P+1) && sqnon&(P+1)) |
387 | { |
388 | if(!(PSG[P<<2]&0x20)) |
389 | { |
390 | if(lengthcount[P]>0) |
391 | { |
9115e7d2 |
392 | lengthcount[P]--; |
c62d2810 |
393 | if(lengthcount[P]<=0) |
394 | { |
395 | sqnon&=~(P+1); |
396 | } |
397 | } |
398 | } |
399 | } |
400 | /* Frequency Sweep Code Here */ |
401 | /* xxxx 0000 */ |
402 | /* xxxx = hz. 120/(x+1)*/ |
403 | if(sweepon[P]) |
404 | { |
405 | int32 mod=0; |
406 | |
9115e7d2 |
407 | if(SweepCount[P]>0) SweepCount[P]--; |
c62d2810 |
408 | if(SweepCount[P]<=0) |
409 | { |
410 | SweepCount[P]=((PSG[(P<<2)+0x1]>>4)&7)+1; //+1; |
411 | { |
412 | if(PSG[(P<<2)+0x1]&0x8) |
413 | { |
9115e7d2 |
414 | mod-=(P^1)+((curfreq[P])>>(PSG[(P<<2)+0x1]&7)); |
c62d2810 |
415 | |
416 | if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/) |
417 | { |
418 | curfreq[P]+=mod; |
419 | } |
420 | } |
421 | else |
422 | { |
423 | mod=curfreq[P]>>(PSG[(P<<2)+0x1]&7); |
424 | if((mod+curfreq[P])&0x800) |
425 | { |
426 | sweepon[P]=0; |
427 | curfreq[P]=0; |
428 | } |
429 | else |
430 | { |
431 | if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/) |
432 | { |
433 | curfreq[P]+=mod; |
434 | } |
435 | } |
436 | } |
437 | } |
438 | } |
9115e7d2 |
439 | } |
c62d2810 |
440 | } |
441 | |
442 | if(PSG[0x15]&0x8 && sqnon&8) |
443 | { |
444 | if(!(PSG[0xC]&0x20)) |
445 | { |
446 | if(lengthcount[3]>0) |
447 | { |
448 | lengthcount[3]--; |
449 | if(lengthcount[3]<=0) |
450 | { |
451 | sqnon&=~8; |
452 | } |
453 | } |
454 | } |
455 | } |
456 | |
457 | case 0: /* Envelope decay + linear counter */ |
458 | if(!trimode) |
9115e7d2 |
459 | { |
c62d2810 |
460 | laster=0; |
461 | if(tricoop) |
462 | { |
463 | if(tricoop==1) DoTriangle(); |
464 | tricoop--; |
465 | } |
466 | } |
467 | |
468 | for(P=0;P<2;P++) |
469 | { |
470 | if(DecCountTo1[P]>0) DecCountTo1[P]--; |
471 | if(DecCountTo1[P]<=0) |
472 | { |
473 | DecCountTo1[P]=(PSG[P<<2]&0xF)+1; |
474 | if(decvolume[P] || PSG[P<<2]&0x20) |
475 | { |
476 | decvolume[P]--; |
477 | /* Step from 0 to full volume seems to take twice as long |
478 | as the other steps. I don't know if this is the correct |
479 | way to double its length, though(or if it even matters). |
480 | */ |
481 | if((PSG[P<<2]&0x20) && (decvolume[P]==0)) |
482 | DecCountTo1[P]<<=1; |
483 | decvolume[P]&=15; |
484 | } |
485 | } |
486 | if(!(PSG[P<<2]&0x10)) |
487 | realvolume[P]=decvolume[P]; |
488 | } |
489 | |
490 | if(DecCountTo1[2]>0) DecCountTo1[2]--; |
491 | if(DecCountTo1[2]<=0) |
492 | { |
493 | DecCountTo1[2]=(PSG[0xC]&0xF)+1; |
494 | if(decvolume[2] || PSG[0xC]&0x20) |
495 | { |
496 | decvolume[2]--; |
497 | /* Step from 0 to full volume seems to take twice as long |
498 | as the other steps. I don't know if this is the correct |
499 | way to double its length, though(or if it even matters). |
500 | */ |
501 | if((PSG[0xC]&0x20) && (decvolume[2]==0)) |
502 | DecCountTo1[2]<<=1; |
503 | decvolume[2]&=15; |
504 | } |
505 | } |
506 | if(!(PSG[0xC]&0x10)) |
507 | realvolume[2]=decvolume[2]; |
508 | |
509 | break; |
510 | } |
511 | |
512 | } |
513 | |
514 | void FrameSoundUpdate(void) |
515 | { |
516 | // Linear counter: Bit 0-6 of $4008 |
517 | // Length counter: Bit 4-7 of $4003, $4007, $400b, $400f |
518 | |
519 | if(fcnt==3) |
520 | { |
521 | if(PSG[0x17]&0x80) |
522 | fhcnt+=fhinc; |
523 | if(!(PSG[0x17]&0xC0)) |
524 | { |
525 | SIRQStat|=0x40; |
526 | X6502_IRQBegin(FCEU_IQFCOUNT); |
527 | } |
528 | } |
529 | //if(SIRQStat&0x40) X6502_IRQBegin(FCEU_IQFCOUNT); |
530 | FrameSoundStuff(fcnt); |
531 | fcnt=(fcnt+1)&3; |
532 | } |
533 | |
534 | static uint32 ChannelBC[5]; |
535 | |
536 | static uint32 RectAmp[2][8]; |
537 | |
538 | static void FASTAPASS(1) CalcRectAmp(int P) |
539 | { |
540 | static int tal[4]={1,2,4,6}; |
541 | int V; |
542 | int x; |
543 | uint32 *b=RectAmp[P]; |
544 | int m; |
545 | |
546 | //if(PSG[P<<2]&0x10) |
547 | V=realvolume[P]<<4; |
548 | //V=(PSG[P<<2]&15)<<4; |
549 | //else |
550 | // V=decvolume[P]<<4; |
551 | m=tal[(PSG[P<<2]&0xC0)>>6]; |
552 | for(x=0;x<m;x++,b++) |
553 | *b=0; |
554 | for(;x<8;x++,b++) |
555 | *b=V; |
556 | } |
557 | |
558 | static void RDoPCM(void) |
559 | { |
560 | int32 V; |
561 | int32 start,end; |
562 | int64 freq; |
563 | uint32 out=PSG[0x11]<<3; |
564 | |
565 | start=ChannelBC[4]; |
4fdfab07 |
566 | end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
567 | if(end<=start) return; |
568 | ChannelBC[4]=end; |
569 | |
570 | if(PSG[0x15]&0x10) |
571 | { |
572 | freq=PCMfreq; |
573 | freq<<=50; |
574 | |
575 | for(V=start;V<end;V++) |
576 | { |
577 | PCMacc-=nesincsizeLL; |
578 | if(PCMacc<=0) |
579 | { |
580 | if(!PCMBitIndex) |
581 | { |
582 | PCMSizeIndex--; |
583 | if(!PCMSizeIndex) |
584 | { |
585 | if(PSG[0x10]&0x40) |
586 | PrepDPCM(); |
587 | else |
588 | { |
589 | PSG[0x15]&=~0x10; |
590 | for(;V<end;V++) |
591 | Wave[V>>4]+=PSG[0x11]<<3; |
592 | goto endopcmo; |
593 | } |
594 | } |
595 | else |
596 | { |
597 | PCMBuffer=ARead[0x8000+PCMAddressIndex](0x8000+PCMAddressIndex); |
598 | PCMAddressIndex=(PCMAddressIndex+1)&0x7fff; |
599 | } |
600 | } |
601 | |
602 | { |
603 | int t=(((PCMBuffer>>PCMBitIndex)&1)<<2)-2; |
604 | uint8 bah=PSG[0x11]; |
605 | |
606 | PCMacc+=freq; |
607 | PSG[0x11]+=t; |
608 | if(PSG[0x11]&0x80) |
609 | PSG[0x11]=bah; |
610 | else |
611 | out=PSG[0x11]<<3; |
612 | } |
613 | PCMBitIndex=(PCMBitIndex+1)&7; |
614 | } |
615 | Wave[V>>4]+=out; //(PSG[0x11]-64)<<3; |
616 | } |
617 | } |
618 | else |
619 | { |
620 | if((end-start)>64) |
621 | { |
622 | for(V=start;V<=(start|15);V++) |
623 | Wave[V>>4]+=out; |
624 | out<<=4; |
625 | for(V=(start>>4)+1;V<(end>>4);V++) |
626 | Wave[V]+=out; |
627 | out>>=4; |
628 | for(V=end&(~15);V<end;V++) |
629 | Wave[V>>4]+=out; |
630 | } |
631 | else |
632 | for(V=start;V<end;V++) |
633 | Wave[V>>4]+=out; |
634 | } |
635 | endopcmo:; |
636 | } |
637 | |
638 | static void RDoSQ1(void) |
639 | { |
640 | int32 V; |
641 | int32 start,end; |
642 | int64 freq; |
643 | |
644 | CalcRectAmp(0); |
645 | start=ChannelBC[0]; |
4fdfab07 |
646 | end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
647 | if(end<=start) return; |
648 | ChannelBC[0]=end; |
649 | |
650 | if(curfreq[0]<8 || curfreq[0]>0x7ff) |
651 | return; |
652 | if(!CheckFreq(curfreq[0],PSG[0x1])) |
653 | return; |
654 | |
655 | if(PSG[0x15]&1 && sqnon&1) |
656 | { |
657 | uint32 out=RectAmp[0][DutyCount[0]]; |
658 | freq=curfreq[0]+1; |
659 | { |
660 | freq<<=50; |
661 | for(V=start;V<end;V++) |
662 | { |
663 | Wave[V>>4]+=out; |
664 | sqacc[0]-=nesincsizeLL; |
665 | if(sqacc[0]<=0) |
666 | { |
667 | rea: |
668 | sqacc[0]+=freq; |
669 | DutyCount[0]++; |
670 | if(sqacc[0]<=0) goto rea; |
671 | |
672 | DutyCount[0]&=7; |
673 | out=RectAmp[0][DutyCount[0]]; |
674 | } |
675 | |
676 | } |
677 | } |
678 | } |
679 | } |
680 | |
681 | static void RDoSQ2(void) |
682 | { |
683 | int32 V; |
684 | int32 start,end; |
685 | int64 freq; |
686 | |
687 | CalcRectAmp(1); |
688 | start=ChannelBC[1]; |
4fdfab07 |
689 | end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
690 | if(end<=start) return; |
691 | ChannelBC[1]=end; |
692 | |
693 | if(curfreq[1]<8 || curfreq[1]>0x7ff) |
694 | return; |
695 | if(!CheckFreq(curfreq[1],PSG[0x5])) |
696 | return; |
697 | |
698 | if(PSG[0x15]&2 && sqnon&2) |
699 | { |
700 | uint32 out=RectAmp[1][DutyCount[1]]; |
701 | freq=curfreq[1]+1; |
702 | |
703 | { |
704 | freq<<=50; |
705 | for(V=start;V<end;V++) |
706 | { |
707 | Wave[V>>4]+=out; |
708 | sqacc[1]-=nesincsizeLL; |
709 | if(sqacc[1]<=0) |
710 | { |
711 | rea: |
712 | sqacc[1]+=freq; |
713 | DutyCount[1]++; |
714 | if(sqacc[1]<=0) goto rea; |
715 | |
716 | DutyCount[1]&=7; |
717 | out=RectAmp[1][DutyCount[1]]; |
718 | } |
719 | |
720 | } |
721 | } |
722 | } |
723 | } |
724 | |
725 | |
726 | static void RDoTriangle(void) |
727 | { |
728 | static uint32 tcout=0; |
729 | int32 V; |
730 | int32 start,end; //,freq; |
731 | int64 freq=(((PSG[0xa]|((PSG[0xb]&7)<<8))+1)); |
732 | |
733 | start=ChannelBC[2]; |
4fdfab07 |
734 | end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
735 | if(end<=start) return; |
736 | ChannelBC[2]=end; |
737 | |
738 | if(! (PSG[0x15]&0x4 && sqnon&4 && tricoop) ) |
739 | { // Counter is halted, but we still need to output. |
740 | for(V=start;V<end;V++) |
741 | Wave[V>>4]+=tcout; |
742 | } |
743 | else if(freq<=4) // 55.9Khz - Might be barely audible on a real NES, but |
744 | // it's too costly to generate audio at this high of a frequency |
745 | // (55.9Khz * 32 for the stepping). |
746 | // The same could probably be said for ~27.8Khz, so we'll |
747 | // take care of that too. We'll just output the average |
748 | // value(15/2 - scaled properly for our output format, of course). |
749 | // We'll also take care of ~18Khz and ~14Khz too, since they should be barely audible. |
750 | // (Some proof or anything to confirm/disprove this would be nice.). |
751 | { |
752 | for(V=start;V<end;V++) |
753 | Wave[V>>4]+=((0xF<<4)+(0xF<<2))>>1; |
754 | } |
755 | else |
756 | { |
9115e7d2 |
757 | static int64 triacc=0; |
758 | static uint8 tc=0; |
c62d2810 |
759 | |
760 | freq<<=49; |
761 | for(V=start;V<end;V++) |
762 | { |
763 | triacc-=nesincsizeLL; |
764 | if(triacc<=0) |
765 | { |
766 | rea: |
767 | triacc+=freq; //t; |
768 | tc=(tc+1)&0x1F; |
769 | if(triacc<=0) goto rea; |
770 | |
771 | tcout=(tc&0xF); |
772 | if(tc&0x10) tcout^=0xF; |
773 | tcout=(tcout<<4)+(tcout<<2); |
774 | } |
775 | Wave[V>>4]+=tcout; |
776 | } |
777 | } |
778 | } |
779 | |
780 | static void RDoNoise(void) |
781 | { |
782 | int32 inc,V; |
783 | int32 start,end; |
784 | |
785 | start=ChannelBC[3]; |
4fdfab07 |
786 | end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
787 | if(end<=start) return; |
788 | ChannelBC[3]=end; |
789 | |
790 | if(PSG[0x15]&0x8 && sqnon&8) |
791 | { |
792 | uint32 outo; |
793 | uint32 amptab[2]; |
794 | uint8 amplitude; |
9115e7d2 |
795 | |
c62d2810 |
796 | amplitude=realvolume[2]; |
797 | //if(PSG[0xC]&0x10) |
798 | // amplitude=(PSG[0xC]&0xF); |
9115e7d2 |
799 | //else |
c62d2810 |
800 | // amplitude=decvolume[2]&0xF; |
801 | |
9115e7d2 |
802 | inc=NoiseFreqTable[PSG[0xE]&0xF]; |
c62d2810 |
803 | amptab[0]=((amplitude<<2)+amplitude+amplitude)<<1; |
804 | amptab[1]=0; |
805 | outo=amptab[nreg&1]; |
806 | |
9115e7d2 |
807 | if(amplitude) |
c62d2810 |
808 | { |
9115e7d2 |
809 | if(PSG[0xE]&0x80) // "short" noise |
c62d2810 |
810 | for(V=start;V<end;V++) |
9115e7d2 |
811 | { |
c62d2810 |
812 | Wave[V>>4]+=outo; |
813 | if(count[3]>=inc) |
9115e7d2 |
814 | { |
815 | uint8 feedback; |
c62d2810 |
816 | |
817 | feedback=((nreg>>8)&1)^((nreg>>14)&1); |
818 | nreg=(nreg<<1)+feedback; |
819 | nreg&=0x7fff; |
820 | outo=amptab[nreg&1]; |
821 | count[3]-=inc; |
822 | } |
823 | count[3]+=0x1000; |
824 | } |
825 | else |
826 | for(V=start;V<end;V++) |
827 | { |
828 | Wave[V>>4]+=outo; |
829 | if(count[3]>=inc) |
830 | { |
831 | uint8 feedback; |
832 | |
833 | feedback=((nreg>>13)&1)^((nreg>>14)&1); |
834 | nreg=(nreg<<1)+feedback; |
835 | nreg&=0x7fff; |
836 | outo=amptab[nreg&1]; |
837 | count[3]-=inc; |
838 | } |
839 | count[3]+=0x1000; |
840 | } |
841 | } |
842 | |
843 | } |
844 | } |
845 | |
d97315ac |
846 | DECLFW(Write_IRQFM) |
847 | { |
ea80a45b |
848 | PSG[0x17]=V; |
d97315ac |
849 | V=(V&0xC0)>>6; |
850 | fcnt=0; |
851 | if(V&0x2) |
852 | FrameSoundUpdate(); |
853 | fcnt=1; |
854 | fhcnt=fhinc; |
855 | X6502_IRQEnd(FCEU_IQFCOUNT); |
856 | SIRQStat&=~0x40; |
ea80a45b |
857 | //IRQFrameMode=V; // IRQFrameMode is PSG[0x17] upper bits |
d97315ac |
858 | } |
859 | |
c62d2810 |
860 | void SetNESSoundMap(void) |
9115e7d2 |
861 | { |
c62d2810 |
862 | SetWriteHandler(0x4000,0x4013,Write_PSG); |
863 | SetWriteHandler(0x4011,0x4011,Write0x11); |
864 | SetWriteHandler(0x4015,0x4015,Write_PSG); |
d97315ac |
865 | SetWriteHandler(0x4017,0x4017,Write_IRQFM); |
c62d2810 |
866 | SetReadHandler(0x4015,0x4015,Read_PSG); |
867 | } |
868 | |
92764e62 |
869 | static int32 WaveNSF[2048]; |
c62d2810 |
870 | |
9115e7d2 |
871 | int32 highp; // 0 through 65536, 0 = no high pass, 65536 = max high pass |
c62d2810 |
872 | |
9115e7d2 |
873 | int32 lowp; // 0 through 65536, 65536 = max low pass(total attenuation) |
c62d2810 |
874 | // 65536 = no low pass |
5232c20c |
875 | static void FilterSound(uint32 *in, int32 *out, int16 *outMono, int count) |
c62d2810 |
876 | { |
877 | static int64 acc=0, acc2=0; |
5232c20c |
878 | //int index=0; |
879 | //int16* tmp; |
880 | //int16* outorig=out; |
881 | //int32 prev=-99999; |
9115e7d2 |
882 | for(;count;count--,in++)//,out++)//,index++) |
c62d2810 |
883 | { |
884 | int64 diff; |
885 | |
886 | diff=((int64)*in<<24)-acc; |
887 | |
888 | acc+=(diff*highp)>>16; |
889 | acc2+=((diff-acc2)*lowp)>>16; |
890 | *in=0; |
9115e7d2 |
891 | |
5232c20c |
892 | // don't change the sound here |
893 | // *out=(acc2*(int64)FSettings.SoundVolume)>>(24+16); |
894 | // volume, 4 times louder by default?? |
895 | // *out = acc2 >> 24; |
896 | // just a bit louder. Hope it's okay |
897 | /* |
898 | *out = acc2 >> 22; |
c62d2810 |
899 | if(*out<-32767) *out=-32767; |
900 | if(*out>32767) *out=32767; |
5232c20c |
901 | // go one back |
9115e7d2 |
902 | |
5232c20c |
903 | // do MONO |
9115e7d2 |
904 | tmp=(int16 *)(out-1); |
5232c20c |
905 | // don't do this the first time |
906 | if (prev == -99999) continue; |
907 | // the middle one should be interpolated |
9115e7d2 |
908 | tmp[1]=(int16)((*out + prev) >> 1); |
909 | prev = *out; |
5232c20c |
910 | */ |
911 | //outMono[index] = (int16)*out; |
912 | *outMono = (int16)(acc2 >> 24); |
913 | //if(*outMono<-16384) *outMono=-16384; |
914 | //if(*outMono>16384) *outMono=16384; |
915 | outMono++; |
9115e7d2 |
916 | |
5232c20c |
917 | // out=((int64)(acc2>>24)*(int64)FSettings.SoundVolume)>>16; //acc2>>24; |
9115e7d2 |
918 | |
c62d2810 |
919 | } |
5232c20c |
920 | // do one more |
c62d2810 |
921 | } |
922 | |
5232c20c |
923 | |
924 | |
925 | |
d97315ac |
926 | static int32 inbuf=0; |
c62d2810 |
927 | int FlushEmulateSound(void) |
928 | { |
c62d2810 |
929 | int x; |
4fdfab07 |
930 | uint32 end; |
5232c20c |
931 | |
c62d2810 |
932 | if(!timestamp) return(0); |
933 | |
5232c20c |
934 | if(!FSettings.SndRate || (soundvol == 0)) |
c62d2810 |
935 | { |
936 | end=0; |
937 | goto nosoundo; |
938 | } |
939 | |
4fdfab07 |
940 | end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
941 | DoSQ1(); |
942 | DoSQ2(); |
943 | DoTriangle(); |
944 | DoNoise(); |
945 | DoPCM(); |
946 | |
947 | if(GameExpSound.Fill) |
948 | GameExpSound.Fill(end&0xF); |
949 | |
5232c20c |
950 | // FilterSound(Wave,WaveFinal,end>>4); |
951 | FilterSound(Wave,WaveFinal,WaveFinalMono,end>>4); |
952 | // printf("count %d, num ints %d\n", end, (end >> 4)); |
c62d2810 |
953 | if(FCEUGameInfo.type==GIT_NSF) |
954 | { |
92764e62 |
955 | int x;//,s=0,si=end/1024; |
956 | for(x=0;x<1024;x++) |
c62d2810 |
957 | { |
92764e62 |
958 | //WaveNSF[x]=WaveFinal[s>>4]; |
959 | WaveNSF[x]=WaveFinalMono[x]; |
960 | //s+=si; |
c62d2810 |
961 | } |
962 | } |
963 | |
964 | if(end&0xF) |
965 | Wave[0]=Wave[(end>>4)]; |
9115e7d2 |
966 | Wave[(end>>4)]=0; |
c62d2810 |
967 | |
968 | nosoundo: |
969 | for(x=0;x<5;x++) |
970 | ChannelBC[x]=end&0xF; |
4fdfab07 |
971 | soundtsoffs=(soundtsinc*(end&0xF))>>16; |
d97315ac |
972 | end>>=4; |
973 | inbuf=end; |
974 | return(end); |
c62d2810 |
975 | } |
976 | |
d97315ac |
977 | int GetSoundBuffer(int32 **W) |
c62d2810 |
978 | { |
979 | *W=WaveNSF; |
d97315ac |
980 | return inbuf; |
c62d2810 |
981 | } |
982 | |
983 | void PowerSound(void) |
984 | { |
985 | int x; |
986 | |
987 | SetNESSoundMap(); |
988 | |
989 | for(x=0;x<0x16;x++) |
990 | if(x!=0x14) |
991 | BWrite[0x4000+x](0x4000+x,0); |
992 | PSG[0x17]=0; //x40; |
993 | fhcnt=fhinc; |
994 | fcnt=0; |
995 | nreg=1; |
4fdfab07 |
996 | soundtsoffs=0; |
c62d2810 |
997 | } |
998 | |
999 | void ResetSound(void) |
1000 | { |
1001 | int x; |
1002 | for(x=0;x<0x16;x++) |
1003 | if(x!=1 && x!=5 && x!=0x14) BWrite[0x4000+x](0x4000+x,0); |
1004 | PSG[0x17]=0; |
1005 | fhcnt=fhinc; |
1006 | fcnt=0; |
1007 | nreg=1; |
1008 | } |
1009 | |
1010 | void SetSoundVariables(void) |
1011 | { |
9115e7d2 |
1012 | int x; |
c62d2810 |
1013 | |
1014 | fhinc=PAL?16626:14915; // *2 CPU clock rate |
1015 | fhinc*=24; |
1016 | for(x=0;x<0x20;x++) |
1017 | lengthtable[x]=Slengthtable[x]<<1; |
1018 | |
1019 | if(FSettings.SndRate) |
1020 | { |
1021 | DoNoise=RDoNoise; |
1022 | DoTriangle=RDoTriangle; |
1023 | DoPCM=RDoPCM; |
1024 | DoSQ1=RDoSQ1; |
1025 | DoSQ2=RDoSQ2; |
9115e7d2 |
1026 | } |
c62d2810 |
1027 | else |
1028 | { |
1029 | DoNoise=DoTriangle=DoPCM=DoSQ1=DoSQ2=Dummyfunc; |
1030 | } |
1031 | |
1032 | if(!FSettings.SndRate) return; |
1033 | if(GameExpSound.RChange) |
1034 | GameExpSound.RChange(); |
1035 | |
d97315ac |
1036 | nesincsizeLL=(int64)((int64)562949953421312*(double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate OVERSAMPLE)); |
1037 | nesincsize=(int64)(((int64)1<<17)*(double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate * 16)); |
c62d2810 |
1038 | PSG_base=(uint32)(PAL?(long double)PAL_CPU/16:(long double)NTSC_CPU/16); |
1039 | |
1040 | for(x=0;x<0x10;x++) |
1041 | { |
1042 | long double z; |
1043 | z=SNoiseFreqTable[x]<<1; |
1044 | z=(PAL?PAL_CPU:NTSC_CPU)/z; |
1045 | z=(long double)((uint32)((FSettings.SndRate OVERSAMPLE)<<12))/z; |
1046 | NoiseFreqTable[x]=z; |
1047 | } |
1048 | soundtsinc=(uint32)((uint64)(PAL?(long double)PAL_CPU*65536:(long double)NTSC_CPU*65536)/(FSettings.SndRate OVERSAMPLE)); |
1049 | memset(Wave,0,2048*4); |
1050 | for(x=0;x<5;x++) |
1051 | ChannelBC[x]=0; |
1052 | highp=(250<<16)/FSettings.SndRate; // Arbitrary |
1053 | lowp=((int64)25000<<16)/FSettings.SndRate; // Arbitrary |
1054 | |
1055 | if(highp>(1<<16)) highp=1<<16; |
1056 | if(lowp>(1<<16)) lowp=1<<16; |
1057 | } |
1058 | |
1059 | void FixOldSaveStateSFreq(void) |
1060 | { |
1061 | int x; |
1062 | for(x=0;x<2;x++) |
1063 | { |
1064 | curfreq[x]=PSG[0x2+(x<<2)]|((PSG[0x3+(x<<2)]&7)<<8); |
1065 | } |
1066 | } |
1067 | |
1068 | void FCEUI_Sound(int Rate) |
1069 | { |
1070 | FSettings.SndRate=Rate; |
1071 | SetSoundVariables(); |
1072 | } |
1073 | |
1074 | void FCEUI_SetSoundVolume(uint32 volume) |
1075 | { |
92764e62 |
1076 | FSettings.SoundVolume=volume; |
c62d2810 |
1077 | } |