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]; |
5232c20c |
46 | int16 WaveFinalMono[2048]; |
c62d2810 |
47 | |
48 | EXPSOUND GameExpSound={0,0,0}; |
49 | |
50 | uint8 trimode=0; |
51 | uint8 tricoop=0; |
52 | uint8 PSG[0x18]; |
53 | |
54 | uint8 decvolume[3]; |
55 | uint8 realvolume[3]; |
56 | |
57 | static int32 count[5]; |
ec4d13a3 |
58 | static int32 sqacc[2]={0,0}; |
c62d2810 |
59 | uint8 sqnon=0; |
60 | |
4fdfab07 |
61 | uint32 soundtsoffs=0; |
62 | |
c62d2810 |
63 | #undef printf |
64 | uint16 nreg; |
9115e7d2 |
65 | |
66 | int32 lengthcount[4]; |
c62d2810 |
67 | |
5232c20c |
68 | extern int soundvol; |
69 | |
c62d2810 |
70 | static const uint8 Slengthtable[0x20]= |
71 | { |
72 | 0x5,0x7f,0xA,0x1,0x14,0x2,0x28,0x3,0x50,0x4,0x1E,0x5,0x7,0x6,0x0E,0x7, |
73 | 0x6,0x08,0xC,0x9,0x18,0xa,0x30,0xb,0x60,0xc,0x24,0xd,0x8,0xe,0x10,0xf |
74 | }; |
75 | |
76 | static uint32 lengthtable[0x20]; |
77 | |
78 | static const uint32 SNoiseFreqTable[0x10]= |
79 | { |
80 | 2,4,8,0x10,0x20,0x30,0x40,0x50,0x65,0x7f,0xbe,0xfe,0x17d,0x1fc,0x3f9,0x7f2 |
81 | }; |
82 | static uint32 NoiseFreqTable[0x10]; |
83 | |
ec4d13a3 |
84 | static int32 nesincsize32; |
d97315ac |
85 | int64 nesincsize; |
c62d2810 |
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 | |
ec4d13a3 |
107 | static int32 PCMacc=0; |
c62d2810 |
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 | |
d447f17f |
116 | static void Dummyfunc(int end) {}; |
c62d2810 |
117 | |
d447f17f |
118 | static void (*DoNoise)(int end)=Dummyfunc; |
119 | static void (*DoTriangle)(int end)=Dummyfunc; |
120 | static void (*DoPCM)(int end)=Dummyfunc; |
121 | static void (*DoSQ1)(int end)=Dummyfunc; |
122 | static void (*DoSQ2)(int end)=Dummyfunc; |
c62d2810 |
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]; |
ec4d13a3 |
157 | PCMacc=PCMfreq<<18; |
c62d2810 |
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 | { |
d447f17f |
190 | DoPCM(0); |
c62d2810 |
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: |
d447f17f |
204 | DoSQ1(0); |
c62d2810 |
205 | if(V&0x10) |
206 | realvolume[0]=V&0xF; |
207 | break; |
208 | case 0x1: |
209 | sweepon[0]=V&0x80; |
210 | break; |
211 | case 0x2: |
d447f17f |
212 | DoSQ1(0); |
c62d2810 |
213 | curfreq[0]&=0xFF00; |
214 | curfreq[0]|=V; |
215 | break; |
9115e7d2 |
216 | case 0x3: |
c62d2810 |
217 | if(PSG[0x15]&1) |
218 | { |
d447f17f |
219 | DoSQ1(0); |
c62d2810 |
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; |
ec4d13a3 |
229 | sqacc[0]=((int32)curfreq[0]+1)<<18; |
c62d2810 |
230 | break; |
231 | |
9115e7d2 |
232 | case 0x4: |
d447f17f |
233 | DoSQ2(0); |
c62d2810 |
234 | if(V&0x10) |
235 | realvolume[1]=V&0xF; |
236 | break; |
237 | case 0x5: |
238 | sweepon[1]=V&0x80; |
239 | break; |
240 | case 0x6: |
d447f17f |
241 | DoSQ2(0); |
c62d2810 |
242 | curfreq[1]&=0xFF00; |
243 | curfreq[1]|=V; |
244 | break; |
9115e7d2 |
245 | case 0x7: |
c62d2810 |
246 | if(PSG[0x15]&2) |
247 | { |
d447f17f |
248 | DoSQ2(0); |
c62d2810 |
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; |
ec4d13a3 |
258 | sqacc[1]=((int32)curfreq[1]+1)<<18; |
c62d2810 |
259 | break; |
9115e7d2 |
260 | case 0x8: |
d447f17f |
261 | DoTriangle(0); |
c62d2810 |
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; |
d447f17f |
271 | case 0xa:DoTriangle(0); |
c62d2810 |
272 | break; |
273 | case 0xb: |
274 | if(PSG[0x15]&0x4) |
275 | { |
d447f17f |
276 | DoTriangle(0); |
c62d2810 |
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; |
d447f17f |
284 | case 0xC:DoNoise(0); |
c62d2810 |
285 | if(V&0x10) |
286 | realvolume[2]=V&0xF; |
287 | break; |
d447f17f |
288 | case 0xE:DoNoise(0);break; |
c62d2810 |
289 | case 0xF: |
290 | if(PSG[0x15]&8) |
291 | { |
d447f17f |
292 | DoNoise(0); |
c62d2810 |
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; |
d447f17f |
299 | case 0x10:DoPCM(0); |
c62d2810 |
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) |
d447f17f |
308 | DoSQ1(0); |
c62d2810 |
309 | if(t&2) |
d447f17f |
310 | DoSQ2(0); |
c62d2810 |
311 | if(t&4) |
d447f17f |
312 | DoTriangle(0); |
c62d2810 |
313 | if(t&8) |
d447f17f |
314 | DoNoise(0); |
c62d2810 |
315 | if(t&0x10) |
d447f17f |
316 | DoPCM(0); |
c62d2810 |
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; |
c62d2810 |
333 | } |
334 | PSG[A]=V; |
335 | } |
336 | |
337 | DECLFR(Read_PSG) |
338 | { |
339 | uint8 ret; |
340 | if(PSG[0x15]&0x10) |
d447f17f |
341 | DoPCM(0); |
c62d2810 |
342 | ret=(PSG[0x15]&(sqnon|0x10))|SIRQStat; |
343 | SIRQStat&=~0x40; |
344 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
345 | return ret; |
346 | } |
347 | |
348 | DECLFR(Read_PSGDummy) |
349 | { |
350 | uint8 ret; |
351 | |
352 | ret=(PSG[0x15]&sqnon)|SIRQStat; |
353 | SIRQStat&=~0x40; |
354 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
355 | return ret; |
356 | } |
357 | |
358 | static void FASTAPASS(1) FrameSoundStuff(int V) |
359 | { |
360 | int P; |
d447f17f |
361 | uint32 end = (SOUNDTS<<16)/soundtsinc; |
c62d2810 |
362 | |
d447f17f |
363 | DoSQ1(end); |
364 | DoSQ2(end); |
365 | DoNoise(end); |
c62d2810 |
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 | { |
d447f17f |
378 | DoTriangle(0); |
c62d2810 |
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 | { |
d447f17f |
463 | if(tricoop==1) DoTriangle(0); |
c62d2810 |
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 | |
d447f17f |
558 | static void RDoPCM(int32 end) |
c62d2810 |
559 | { |
560 | int32 V; |
d447f17f |
561 | int32 start; |
ec4d13a3 |
562 | int32 freq; |
c62d2810 |
563 | uint32 out=PSG[0x11]<<3; |
564 | |
565 | start=ChannelBC[4]; |
d447f17f |
566 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
567 | if(end<=start) return; |
568 | ChannelBC[4]=end; |
569 | |
570 | if(PSG[0x15]&0x10) |
571 | { |
572 | freq=PCMfreq; |
ec4d13a3 |
573 | freq<<=18; |
c62d2810 |
574 | |
575 | for(V=start;V<end;V++) |
576 | { |
ec4d13a3 |
577 | PCMacc-=nesincsize32; |
c62d2810 |
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 | |
d447f17f |
638 | static void RDoSQ1(int32 end) |
c62d2810 |
639 | { |
640 | int32 V; |
d447f17f |
641 | int32 start; |
ec4d13a3 |
642 | int32 freq; |
c62d2810 |
643 | |
c62d2810 |
644 | start=ChannelBC[0]; |
d447f17f |
645 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
646 | if(end<=start) return; |
647 | ChannelBC[0]=end; |
648 | |
d447f17f |
649 | if(!(PSG[0x15]&1 && sqnon&1)) |
650 | return; |
651 | |
c62d2810 |
652 | if(curfreq[0]<8 || curfreq[0]>0x7ff) |
653 | return; |
654 | if(!CheckFreq(curfreq[0],PSG[0x1])) |
655 | return; |
656 | |
d447f17f |
657 | CalcRectAmp(0); |
658 | |
c62d2810 |
659 | { |
660 | uint32 out=RectAmp[0][DutyCount[0]]; |
661 | freq=curfreq[0]+1; |
662 | { |
ec4d13a3 |
663 | freq<<=18; |
c62d2810 |
664 | for(V=start;V<end;V++) |
665 | { |
666 | Wave[V>>4]+=out; |
ec4d13a3 |
667 | sqacc[0]-=nesincsize32; |
c62d2810 |
668 | if(sqacc[0]<=0) |
669 | { |
670 | rea: |
671 | sqacc[0]+=freq; |
672 | DutyCount[0]++; |
673 | if(sqacc[0]<=0) goto rea; |
674 | |
675 | DutyCount[0]&=7; |
676 | out=RectAmp[0][DutyCount[0]]; |
677 | } |
c62d2810 |
678 | } |
c62d2810 |
679 | } |
d447f17f |
680 | } |
c62d2810 |
681 | } |
682 | |
d447f17f |
683 | static void RDoSQ2(int32 end) |
c62d2810 |
684 | { |
685 | int32 V; |
d447f17f |
686 | int32 start; |
ec4d13a3 |
687 | int32 freq; |
c62d2810 |
688 | |
c62d2810 |
689 | start=ChannelBC[1]; |
d447f17f |
690 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
691 | if(end<=start) return; |
692 | ChannelBC[1]=end; |
693 | |
d447f17f |
694 | if(!(PSG[0x15]&2 && sqnon&2)) |
695 | return; |
696 | |
c62d2810 |
697 | if(curfreq[1]<8 || curfreq[1]>0x7ff) |
698 | return; |
699 | if(!CheckFreq(curfreq[1],PSG[0x5])) |
700 | return; |
701 | |
d447f17f |
702 | CalcRectAmp(1); |
703 | |
c62d2810 |
704 | { |
705 | uint32 out=RectAmp[1][DutyCount[1]]; |
706 | freq=curfreq[1]+1; |
707 | |
708 | { |
ec4d13a3 |
709 | freq<<=18; |
c62d2810 |
710 | for(V=start;V<end;V++) |
711 | { |
712 | Wave[V>>4]+=out; |
ec4d13a3 |
713 | sqacc[1]-=nesincsize32; |
c62d2810 |
714 | if(sqacc[1]<=0) |
715 | { |
716 | rea: |
717 | sqacc[1]+=freq; |
718 | DutyCount[1]++; |
719 | if(sqacc[1]<=0) goto rea; |
720 | |
721 | DutyCount[1]&=7; |
722 | out=RectAmp[1][DutyCount[1]]; |
723 | } |
c62d2810 |
724 | } |
c62d2810 |
725 | } |
d447f17f |
726 | } |
c62d2810 |
727 | } |
728 | |
729 | |
d447f17f |
730 | static void RDoTriangle(int32 end) |
c62d2810 |
731 | { |
732 | static uint32 tcout=0; |
733 | int32 V; |
d447f17f |
734 | int32 start; //,freq; |
ec4d13a3 |
735 | int32 freq=(((PSG[0xa]|((PSG[0xb]&7)<<8))+1)); |
c62d2810 |
736 | |
737 | start=ChannelBC[2]; |
d447f17f |
738 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
739 | if(end<=start) return; |
740 | ChannelBC[2]=end; |
741 | |
742 | if(! (PSG[0x15]&0x4 && sqnon&4 && tricoop) ) |
743 | { // Counter is halted, but we still need to output. |
744 | for(V=start;V<end;V++) |
745 | Wave[V>>4]+=tcout; |
746 | } |
747 | else if(freq<=4) // 55.9Khz - Might be barely audible on a real NES, but |
748 | // it's too costly to generate audio at this high of a frequency |
749 | // (55.9Khz * 32 for the stepping). |
750 | // The same could probably be said for ~27.8Khz, so we'll |
751 | // take care of that too. We'll just output the average |
752 | // value(15/2 - scaled properly for our output format, of course). |
753 | // We'll also take care of ~18Khz and ~14Khz too, since they should be barely audible. |
754 | // (Some proof or anything to confirm/disprove this would be nice.). |
755 | { |
756 | for(V=start;V<end;V++) |
757 | Wave[V>>4]+=((0xF<<4)+(0xF<<2))>>1; |
758 | } |
759 | else |
760 | { |
ec4d13a3 |
761 | static int32 triacc=0; |
9115e7d2 |
762 | static uint8 tc=0; |
c62d2810 |
763 | |
ec4d13a3 |
764 | freq<<=17; |
c62d2810 |
765 | for(V=start;V<end;V++) |
766 | { |
ec4d13a3 |
767 | triacc-=nesincsize32; |
c62d2810 |
768 | if(triacc<=0) |
769 | { |
770 | rea: |
771 | triacc+=freq; //t; |
772 | tc=(tc+1)&0x1F; |
773 | if(triacc<=0) goto rea; |
774 | |
775 | tcout=(tc&0xF); |
776 | if(tc&0x10) tcout^=0xF; |
777 | tcout=(tcout<<4)+(tcout<<2); |
778 | } |
779 | Wave[V>>4]+=tcout; |
780 | } |
781 | } |
782 | } |
783 | |
d447f17f |
784 | static void RDoNoise(int32 end) |
c62d2810 |
785 | { |
786 | int32 inc,V; |
d447f17f |
787 | int32 start; |
c62d2810 |
788 | |
789 | start=ChannelBC[3]; |
d447f17f |
790 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
791 | if(end<=start) return; |
792 | ChannelBC[3]=end; |
793 | |
794 | if(PSG[0x15]&0x8 && sqnon&8) |
795 | { |
796 | uint32 outo; |
797 | uint32 amptab[2]; |
798 | uint8 amplitude; |
9115e7d2 |
799 | |
c62d2810 |
800 | amplitude=realvolume[2]; |
801 | //if(PSG[0xC]&0x10) |
802 | // amplitude=(PSG[0xC]&0xF); |
9115e7d2 |
803 | //else |
c62d2810 |
804 | // amplitude=decvolume[2]&0xF; |
805 | |
9115e7d2 |
806 | inc=NoiseFreqTable[PSG[0xE]&0xF]; |
c62d2810 |
807 | amptab[0]=((amplitude<<2)+amplitude+amplitude)<<1; |
808 | amptab[1]=0; |
809 | outo=amptab[nreg&1]; |
810 | |
9115e7d2 |
811 | if(amplitude) |
c62d2810 |
812 | { |
9115e7d2 |
813 | if(PSG[0xE]&0x80) // "short" noise |
c62d2810 |
814 | for(V=start;V<end;V++) |
9115e7d2 |
815 | { |
c62d2810 |
816 | Wave[V>>4]+=outo; |
817 | if(count[3]>=inc) |
9115e7d2 |
818 | { |
819 | uint8 feedback; |
c62d2810 |
820 | |
821 | feedback=((nreg>>8)&1)^((nreg>>14)&1); |
822 | nreg=(nreg<<1)+feedback; |
823 | nreg&=0x7fff; |
824 | outo=amptab[nreg&1]; |
825 | count[3]-=inc; |
826 | } |
827 | count[3]+=0x1000; |
828 | } |
829 | else |
830 | for(V=start;V<end;V++) |
831 | { |
832 | Wave[V>>4]+=outo; |
833 | if(count[3]>=inc) |
834 | { |
835 | uint8 feedback; |
836 | |
837 | feedback=((nreg>>13)&1)^((nreg>>14)&1); |
838 | nreg=(nreg<<1)+feedback; |
839 | nreg&=0x7fff; |
840 | outo=amptab[nreg&1]; |
841 | count[3]-=inc; |
842 | } |
843 | count[3]+=0x1000; |
844 | } |
845 | } |
c62d2810 |
846 | } |
847 | } |
848 | |
d97315ac |
849 | DECLFW(Write_IRQFM) |
850 | { |
ea80a45b |
851 | PSG[0x17]=V; |
d97315ac |
852 | V=(V&0xC0)>>6; |
853 | fcnt=0; |
854 | if(V&0x2) |
855 | FrameSoundUpdate(); |
856 | fcnt=1; |
857 | fhcnt=fhinc; |
858 | X6502_IRQEnd(FCEU_IQFCOUNT); |
859 | SIRQStat&=~0x40; |
ea80a45b |
860 | //IRQFrameMode=V; // IRQFrameMode is PSG[0x17] upper bits |
d97315ac |
861 | } |
862 | |
c62d2810 |
863 | void SetNESSoundMap(void) |
9115e7d2 |
864 | { |
c62d2810 |
865 | SetWriteHandler(0x4000,0x4013,Write_PSG); |
866 | SetWriteHandler(0x4011,0x4011,Write0x11); |
867 | SetWriteHandler(0x4015,0x4015,Write_PSG); |
d97315ac |
868 | SetWriteHandler(0x4017,0x4017,Write_IRQFM); |
c62d2810 |
869 | SetReadHandler(0x4015,0x4015,Read_PSG); |
870 | } |
871 | |
9115e7d2 |
872 | int32 highp; // 0 through 65536, 0 = no high pass, 65536 = max high pass |
c62d2810 |
873 | |
9115e7d2 |
874 | int32 lowp; // 0 through 65536, 65536 = max low pass(total attenuation) |
c62d2810 |
875 | // 65536 = no low pass |
7b356ee3 |
876 | static int32 flt_acc=0, flt_acc2=0; |
877 | |
d447f17f |
878 | static void FilterSound(uint32 *in, int16 *outMono, int count) |
c62d2810 |
879 | { |
d447f17f |
880 | // static int min=0, max=0; |
ec4d13a3 |
881 | |
882 | for(;count;count--,in++,outMono++) |
c62d2810 |
883 | { |
ec4d13a3 |
884 | int32 diff; |
c62d2810 |
885 | |
7b356ee3 |
886 | diff = *in - flt_acc; |
c62d2810 |
887 | |
7b356ee3 |
888 | flt_acc += (diff*highp)>>16; |
889 | flt_acc2+= (int32) (((int64)((diff-flt_acc2)*lowp))>>16); |
c62d2810 |
890 | *in=0; |
9115e7d2 |
891 | |
7b356ee3 |
892 | *outMono = flt_acc2*7 >> 2; // * 1.75 |
d447f17f |
893 | // if (acc2 < min) { printf("min: %i %04x\n", acc2, acc2); min = acc2; } |
894 | // if (acc2 > max) { printf("max: %i %04x\n", acc2, acc2); max = acc2; } |
c62d2810 |
895 | } |
896 | } |
897 | |
5232c20c |
898 | |
899 | |
d97315ac |
900 | static int32 inbuf=0; |
c62d2810 |
901 | int FlushEmulateSound(void) |
902 | { |
c62d2810 |
903 | int x; |
4fdfab07 |
904 | uint32 end; |
5232c20c |
905 | |
c62d2810 |
906 | if(!timestamp) return(0); |
907 | |
5232c20c |
908 | if(!FSettings.SndRate || (soundvol == 0)) |
c62d2810 |
909 | { |
910 | end=0; |
911 | goto nosoundo; |
912 | } |
913 | |
4fdfab07 |
914 | end=(SOUNDTS<<16)/soundtsinc; |
d447f17f |
915 | DoSQ1(end); |
916 | DoSQ2(end); |
917 | DoTriangle(end); |
918 | DoNoise(end); |
919 | DoPCM(end); |
c62d2810 |
920 | |
921 | if(GameExpSound.Fill) |
922 | GameExpSound.Fill(end&0xF); |
923 | |
d447f17f |
924 | FilterSound(Wave,WaveFinalMono,end>>4); |
c62d2810 |
925 | |
926 | if(end&0xF) |
927 | Wave[0]=Wave[(end>>4)]; |
9115e7d2 |
928 | Wave[(end>>4)]=0; |
c62d2810 |
929 | |
930 | nosoundo: |
931 | for(x=0;x<5;x++) |
932 | ChannelBC[x]=end&0xF; |
4fdfab07 |
933 | soundtsoffs=(soundtsinc*(end&0xF))>>16; |
d97315ac |
934 | end>>=4; |
935 | inbuf=end; |
936 | return(end); |
c62d2810 |
937 | } |
938 | |
c4980f9e |
939 | int GetSoundBuffer(int16 **W) |
c62d2810 |
940 | { |
c4980f9e |
941 | *W=WaveFinalMono; |
d97315ac |
942 | return inbuf; |
c62d2810 |
943 | } |
944 | |
945 | void PowerSound(void) |
946 | { |
947 | int x; |
948 | |
949 | SetNESSoundMap(); |
950 | |
951 | for(x=0;x<0x16;x++) |
952 | if(x!=0x14) |
953 | BWrite[0x4000+x](0x4000+x,0); |
954 | PSG[0x17]=0; //x40; |
955 | fhcnt=fhinc; |
956 | fcnt=0; |
957 | nreg=1; |
4fdfab07 |
958 | soundtsoffs=0; |
c62d2810 |
959 | } |
960 | |
961 | void ResetSound(void) |
962 | { |
963 | int x; |
964 | for(x=0;x<0x16;x++) |
965 | if(x!=1 && x!=5 && x!=0x14) BWrite[0x4000+x](0x4000+x,0); |
966 | PSG[0x17]=0; |
967 | fhcnt=fhinc; |
968 | fcnt=0; |
969 | nreg=1; |
970 | } |
971 | |
972 | void SetSoundVariables(void) |
973 | { |
9115e7d2 |
974 | int x; |
c62d2810 |
975 | |
976 | fhinc=PAL?16626:14915; // *2 CPU clock rate |
977 | fhinc*=24; |
978 | for(x=0;x<0x20;x++) |
979 | lengthtable[x]=Slengthtable[x]<<1; |
980 | |
981 | if(FSettings.SndRate) |
982 | { |
983 | DoNoise=RDoNoise; |
984 | DoTriangle=RDoTriangle; |
985 | DoPCM=RDoPCM; |
986 | DoSQ1=RDoSQ1; |
987 | DoSQ2=RDoSQ2; |
9115e7d2 |
988 | } |
c62d2810 |
989 | else |
990 | { |
991 | DoNoise=DoTriangle=DoPCM=DoSQ1=DoSQ2=Dummyfunc; |
992 | } |
993 | |
994 | if(!FSettings.SndRate) return; |
995 | if(GameExpSound.RChange) |
996 | GameExpSound.RChange(); |
997 | |
ec4d13a3 |
998 | // nesincsizeLL=(int64)((int64)562949953421312*(double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate OVERSAMPLE)); |
d447f17f |
999 | nesincsize=(int64)(((int64)1<<17)*(double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate * 16)); // 308845 - 1832727 |
ec4d13a3 |
1000 | nesincsize32=(int32)nesincsize; |
c62d2810 |
1001 | PSG_base=(uint32)(PAL?(long double)PAL_CPU/16:(long double)NTSC_CPU/16); |
1002 | |
1003 | for(x=0;x<0x10;x++) |
1004 | { |
1005 | long double z; |
1006 | z=SNoiseFreqTable[x]<<1; |
1007 | z=(PAL?PAL_CPU:NTSC_CPU)/z; |
1008 | z=(long double)((uint32)((FSettings.SndRate OVERSAMPLE)<<12))/z; |
1009 | NoiseFreqTable[x]=z; |
1010 | } |
1011 | soundtsinc=(uint32)((uint64)(PAL?(long double)PAL_CPU*65536:(long double)NTSC_CPU*65536)/(FSettings.SndRate OVERSAMPLE)); |
d447f17f |
1012 | memset(Wave,0,sizeof(Wave)); |
c62d2810 |
1013 | for(x=0;x<5;x++) |
1014 | ChannelBC[x]=0; |
1015 | highp=(250<<16)/FSettings.SndRate; // Arbitrary |
ec4d13a3 |
1016 | lowp=(25000<<16)/FSettings.SndRate; // Arbitrary |
c62d2810 |
1017 | |
1018 | if(highp>(1<<16)) highp=1<<16; |
1019 | if(lowp>(1<<16)) lowp=1<<16; |
7b356ee3 |
1020 | |
1021 | flt_acc=flt_acc2=0; |
c62d2810 |
1022 | } |
1023 | |
1024 | void FixOldSaveStateSFreq(void) |
1025 | { |
1026 | int x; |
1027 | for(x=0;x<2;x++) |
1028 | { |
1029 | curfreq[x]=PSG[0x2+(x<<2)]|((PSG[0x3+(x<<2)]&7)<<8); |
1030 | } |
1031 | } |
1032 | |
1033 | void FCEUI_Sound(int Rate) |
1034 | { |
1035 | FSettings.SndRate=Rate; |
1036 | SetSoundVariables(); |
1037 | } |
1038 | |
1039 | void FCEUI_SetSoundVolume(uint32 volume) |
1040 | { |
92764e62 |
1041 | FSettings.SoundVolume=volume; |
c62d2810 |
1042 | } |