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