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 | |
a384bf44 |
42 | uint32 Wave[2048+512]; |
43 | int16 WaveFinalMono[2048+512]; |
c62d2810 |
44 | |
a384bf44 |
45 | EXPSOUND GameExpSound={0,0,0,0,0,0}; |
c62d2810 |
46 | |
47 | uint8 trimode=0; |
48 | uint8 tricoop=0; |
49 | uint8 PSG[0x18]; |
50 | |
51 | uint8 decvolume[3]; |
52 | uint8 realvolume[3]; |
53 | |
54 | static int32 count[5]; |
ec4d13a3 |
55 | static int32 sqacc[2]={0,0}; |
c62d2810 |
56 | uint8 sqnon=0; |
57 | |
4fdfab07 |
58 | uint32 soundtsoffs=0; |
59 | |
c62d2810 |
60 | #undef printf |
61 | uint16 nreg; |
9115e7d2 |
62 | |
a384bf44 |
63 | static int32 lengthcount[4]; |
c62d2810 |
64 | |
5232c20c |
65 | extern int soundvol; |
66 | |
c62d2810 |
67 | static const uint8 Slengthtable[0x20]= |
68 | { |
69 | 0x5,0x7f,0xA,0x1,0x14,0x2,0x28,0x3,0x50,0x4,0x1E,0x5,0x7,0x6,0x0E,0x7, |
70 | 0x6,0x08,0xC,0x9,0x18,0xa,0x30,0xb,0x60,0xc,0x24,0xd,0x8,0xe,0x10,0xf |
71 | }; |
72 | |
73 | static uint32 lengthtable[0x20]; |
74 | |
75 | static const uint32 SNoiseFreqTable[0x10]= |
76 | { |
77 | 2,4,8,0x10,0x20,0x30,0x40,0x50,0x65,0x7f,0xbe,0xfe,0x17d,0x1fc,0x3f9,0x7f2 |
78 | }; |
79 | static uint32 NoiseFreqTable[0x10]; |
80 | |
a384bf44 |
81 | int32 nesincsize; |
82 | uint32 soundtsinc; |
83 | uint32 soundtsi; |
84 | |
c62d2810 |
85 | |
86 | static const uint8 NTSCPCMTable[0x10]= |
87 | { |
88 | 0xd6,0xbe,0xaa,0xa0,0x8f,0x7f,0x71,0x6b, |
89 | 0x5f,0x50,0x47,0x40,0x35,0x2a,0x24,0x1b |
90 | }; |
91 | |
92 | static const uint8 PALPCMTable[0x10]= // These values are just guessed. |
93 | { |
94 | 0xc6,0xb0,0x9d,0x94,0x84,0x75,0x68,0x63, |
95 | 0x58,0x4a,0x41,0x3b,0x31,0x27,0x21,0x19 |
96 | }; |
97 | |
98 | uint32 PSG_base; |
99 | |
100 | // $4010 - Frequency |
101 | // $4011 - Actual data outputted |
102 | // $4012 - Address register: $c000 + V*64 |
103 | // $4013 - Size register: Size in bytes = (V+1)*64 |
104 | |
105 | |
ec4d13a3 |
106 | static int32 PCMacc=0; |
c62d2810 |
107 | static int PCMfreq; |
108 | int32 PCMIRQCount; |
109 | uint8 PCMBitIndex=0; |
110 | uint32 PCMAddressIndex=0; |
111 | int32 PCMSizeIndex=0; |
9115e7d2 |
112 | uint8 PCMBuffer=0; |
c62d2810 |
113 | int vdis=0; |
114 | |
d447f17f |
115 | static void Dummyfunc(int end) {}; |
c62d2810 |
116 | |
d447f17f |
117 | static void (*DoNoise)(int end)=Dummyfunc; |
118 | static void (*DoTriangle)(int end)=Dummyfunc; |
119 | static void (*DoPCM)(int end)=Dummyfunc; |
120 | static void (*DoSQ1)(int end)=Dummyfunc; |
121 | static void (*DoSQ2)(int end)=Dummyfunc; |
c62d2810 |
122 | |
123 | static void CalcDPCMIRQ(void) |
124 | { |
125 | uint32 freq; |
126 | uint32 honk; |
127 | uint32 cycles; |
128 | |
129 | if(PAL) |
130 | freq=(PALPCMTable[PSG[0x10]&0xF]<<4); |
131 | else |
132 | freq=(NTSCPCMTable[PSG[0x10]&0xF]<<4); |
133 | |
134 | cycles=(((PSG[0x13]<<4)+1)); |
9115e7d2 |
135 | cycles*=freq/14; |
c62d2810 |
136 | honk=((PSG[0x13]<<4)+1)*freq; |
9115e7d2 |
137 | honk-=cycles; |
c62d2810 |
138 | //if(PAL) honk/=107; |
139 | //else honk/=(double)113.66666666; |
140 | PCMIRQCount=honk*48; |
141 | //PCMIRQCount=honk*3; //180; |
142 | //if(PAL) PCMIRQCount*=.93; |
143 | vdis=0; |
144 | } |
145 | |
146 | static void PrepDPCM() |
147 | { |
9115e7d2 |
148 | PCMAddressIndex=0x4000+(PSG[0x12]<<6); |
c62d2810 |
149 | PCMSizeIndex=(PSG[0x13]<<4)+1; |
9115e7d2 |
150 | PCMBitIndex=0; |
c62d2810 |
151 | //PCMBuffer=ARead[0x8000+PCMAddressIndex](0x8000+PCMAddressIndex); |
152 | if(PAL) |
153 | PCMfreq=PALPCMTable[PSG[0x10]&0xF]; |
154 | else |
155 | PCMfreq=NTSCPCMTable[PSG[0x10]&0xF]; |
ec4d13a3 |
156 | PCMacc=PCMfreq<<18; |
c62d2810 |
157 | } |
158 | |
159 | uint8 sweepon[2]={0,0}; |
160 | int32 curfreq[2]={0,0}; |
161 | |
162 | |
163 | uint8 SIRQStat=0; |
164 | |
165 | uint8 SweepCount[2]; |
166 | uint8 DecCountTo1[3]; |
167 | |
168 | uint8 fcnt=0; |
169 | int32 fhcnt=0; |
170 | int32 fhinc; |
171 | |
172 | static uint8 laster; |
173 | |
174 | /* Instantaneous? Maybe the new freq value is being calculated all of the time... */ |
175 | static int FASTAPASS(2) CheckFreq(uint32 cf, uint8 sr) |
176 | { |
177 | uint32 mod; |
178 | if(!(sr&0x8)) |
179 | { |
180 | mod=cf>>(sr&7); |
181 | if((mod+cf)&0x800) |
182 | return(0); |
183 | } |
184 | return(1); |
185 | } |
186 | |
187 | static DECLFW(Write0x11) |
188 | { |
d447f17f |
189 | DoPCM(0); |
c62d2810 |
190 | PSG[0x11]=V&0x7F; |
191 | } |
192 | |
193 | static uint8 DutyCount[2]={0,0}; |
194 | |
195 | static DECLFW(Write_PSG) |
196 | { |
197 | //if((A>=0x4004 && A<=0x4007) || A==0x4015) |
4fdfab07 |
198 | //printf("$%04x:$%02x, %d\n",A,V,SOUNDTS); |
c62d2810 |
199 | A&=0x1f; |
200 | switch(A) |
201 | { |
202 | case 0x0: |
d447f17f |
203 | DoSQ1(0); |
c62d2810 |
204 | if(V&0x10) |
205 | realvolume[0]=V&0xF; |
206 | break; |
207 | case 0x1: |
208 | sweepon[0]=V&0x80; |
209 | break; |
210 | case 0x2: |
d447f17f |
211 | DoSQ1(0); |
c62d2810 |
212 | curfreq[0]&=0xFF00; |
213 | curfreq[0]|=V; |
214 | break; |
9115e7d2 |
215 | case 0x3: |
c62d2810 |
216 | if(PSG[0x15]&1) |
217 | { |
d447f17f |
218 | DoSQ1(0); |
c62d2810 |
219 | lengthcount[0]=lengthtable[(V>>3)&0x1f]; |
9115e7d2 |
220 | sqnon|=1; |
c62d2810 |
221 | } |
222 | sweepon[0]=PSG[1]&0x80; |
223 | curfreq[0]=PSG[0x2]|((V&7)<<8); |
224 | decvolume[0]=0xF; |
225 | DecCountTo1[0]=(PSG[0]&0xF)+1; |
226 | SweepCount[0]=((PSG[0x1]>>4)&7)+1; |
227 | DutyCount[0]=0; |
ec4d13a3 |
228 | sqacc[0]=((int32)curfreq[0]+1)<<18; |
c62d2810 |
229 | break; |
230 | |
9115e7d2 |
231 | case 0x4: |
d447f17f |
232 | DoSQ2(0); |
c62d2810 |
233 | if(V&0x10) |
234 | realvolume[1]=V&0xF; |
235 | break; |
236 | case 0x5: |
237 | sweepon[1]=V&0x80; |
238 | break; |
239 | case 0x6: |
d447f17f |
240 | DoSQ2(0); |
c62d2810 |
241 | curfreq[1]&=0xFF00; |
242 | curfreq[1]|=V; |
243 | break; |
9115e7d2 |
244 | case 0x7: |
c62d2810 |
245 | if(PSG[0x15]&2) |
246 | { |
d447f17f |
247 | DoSQ2(0); |
c62d2810 |
248 | lengthcount[1]=lengthtable[(V>>3)&0x1f]; |
249 | sqnon|=2; |
250 | } |
251 | sweepon[1]=PSG[0x5]&0x80; |
9115e7d2 |
252 | curfreq[1]=PSG[0x6]|((V&7)<<8); |
c62d2810 |
253 | decvolume[1]=0xF; |
254 | DecCountTo1[1]=(PSG[0x4]&0xF)+1; |
255 | SweepCount[1]=((PSG[0x5]>>4)&7)+1; |
256 | DutyCount[1]=0; |
ec4d13a3 |
257 | sqacc[1]=((int32)curfreq[1]+1)<<18; |
c62d2810 |
258 | break; |
9115e7d2 |
259 | case 0x8: |
d447f17f |
260 | DoTriangle(0); |
c62d2810 |
261 | if(laster&0x80) |
262 | { |
263 | tricoop=V&0x7F; |
264 | trimode=V&0x80; |
265 | } |
266 | if(!(V&0x7F)) |
267 | tricoop=0; |
268 | laster=V&0x80; |
269 | break; |
d447f17f |
270 | case 0xa:DoTriangle(0); |
c62d2810 |
271 | break; |
272 | case 0xb: |
273 | if(PSG[0x15]&0x4) |
274 | { |
d447f17f |
275 | DoTriangle(0); |
c62d2810 |
276 | sqnon|=4; |
277 | lengthcount[2]=lengthtable[(V>>3)&0x1f]; |
278 | } |
279 | laster=0x80; |
280 | tricoop=PSG[0x8]&0x7f; |
281 | trimode=PSG[0x8]&0x80; |
282 | break; |
d447f17f |
283 | case 0xC:DoNoise(0); |
c62d2810 |
284 | if(V&0x10) |
285 | realvolume[2]=V&0xF; |
286 | break; |
d447f17f |
287 | case 0xE:DoNoise(0);break; |
c62d2810 |
288 | case 0xF: |
289 | if(PSG[0x15]&8) |
290 | { |
d447f17f |
291 | DoNoise(0); |
c62d2810 |
292 | sqnon|=8; |
293 | lengthcount[3]=lengthtable[(V>>3)&0x1f]; |
294 | } |
295 | decvolume[2]=0xF; |
9115e7d2 |
296 | DecCountTo1[2]=(PSG[0xC]&0xF)+1; |
c62d2810 |
297 | break; |
d447f17f |
298 | case 0x10:DoPCM(0); |
c62d2810 |
299 | if(!(V&0x80)) |
300 | X6502_IRQEnd(FCEU_IQDPCM); |
301 | break; |
9115e7d2 |
302 | case 0x15: |
c62d2810 |
303 | { |
304 | int t=V^PSG[0x15]; |
305 | |
306 | if(t&1) |
d447f17f |
307 | DoSQ1(0); |
c62d2810 |
308 | if(t&2) |
d447f17f |
309 | DoSQ2(0); |
c62d2810 |
310 | if(t&4) |
d447f17f |
311 | DoTriangle(0); |
c62d2810 |
312 | if(t&8) |
d447f17f |
313 | DoNoise(0); |
c62d2810 |
314 | if(t&0x10) |
d447f17f |
315 | DoPCM(0); |
c62d2810 |
316 | sqnon&=V; |
317 | if(V&0x10) |
318 | { |
319 | if(!(PSG[0x15]&0x10)) |
320 | { |
321 | PrepDPCM(); |
322 | CalcDPCMIRQ(); |
323 | } |
324 | else if(vdis) |
325 | CalcDPCMIRQ(); |
326 | } |
327 | else |
328 | PCMIRQCount=0; |
329 | X6502_IRQEnd(FCEU_IQDPCM); |
330 | } |
331 | break; |
c62d2810 |
332 | } |
333 | PSG[A]=V; |
334 | } |
335 | |
336 | DECLFR(Read_PSG) |
337 | { |
338 | uint8 ret; |
339 | if(PSG[0x15]&0x10) |
d447f17f |
340 | DoPCM(0); |
c62d2810 |
341 | ret=(PSG[0x15]&(sqnon|0x10))|SIRQStat; |
342 | SIRQStat&=~0x40; |
343 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
344 | return ret; |
345 | } |
346 | |
347 | DECLFR(Read_PSGDummy) |
348 | { |
349 | uint8 ret; |
350 | |
351 | ret=(PSG[0x15]&sqnon)|SIRQStat; |
352 | SIRQStat&=~0x40; |
353 | X6502_IRQEnd(/*FCEU_IQDPCM|*/FCEU_IQFCOUNT); |
354 | return ret; |
355 | } |
356 | |
357 | static void FASTAPASS(1) FrameSoundStuff(int V) |
358 | { |
359 | int P; |
d447f17f |
360 | uint32 end = (SOUNDTS<<16)/soundtsinc; |
c62d2810 |
361 | |
d447f17f |
362 | DoSQ1(end); |
363 | DoSQ2(end); |
364 | DoNoise(end); |
c62d2810 |
365 | |
366 | switch((V&1)) |
367 | { |
368 | case 1: /* Envelope decay, linear counter, length counter, freq sweep */ |
369 | if(PSG[0x15]&4 && sqnon&4) |
370 | if(!(PSG[8]&0x80)) |
371 | { |
372 | if(lengthcount[2]>0) |
373 | { |
374 | lengthcount[2]--; |
375 | if(lengthcount[2]<=0) |
376 | { |
d447f17f |
377 | DoTriangle(0); |
c62d2810 |
378 | sqnon&=~4; |
379 | } |
9115e7d2 |
380 | } |
c62d2810 |
381 | } |
382 | |
383 | for(P=0;P<2;P++) |
384 | { |
385 | if(PSG[0x15]&(P+1) && sqnon&(P+1)) |
386 | { |
387 | if(!(PSG[P<<2]&0x20)) |
388 | { |
389 | if(lengthcount[P]>0) |
390 | { |
9115e7d2 |
391 | lengthcount[P]--; |
c62d2810 |
392 | if(lengthcount[P]<=0) |
393 | { |
394 | sqnon&=~(P+1); |
395 | } |
396 | } |
397 | } |
398 | } |
399 | /* Frequency Sweep Code Here */ |
400 | /* xxxx 0000 */ |
401 | /* xxxx = hz. 120/(x+1)*/ |
402 | if(sweepon[P]) |
403 | { |
404 | int32 mod=0; |
405 | |
9115e7d2 |
406 | if(SweepCount[P]>0) SweepCount[P]--; |
c62d2810 |
407 | if(SweepCount[P]<=0) |
408 | { |
409 | SweepCount[P]=((PSG[(P<<2)+0x1]>>4)&7)+1; //+1; |
410 | { |
411 | if(PSG[(P<<2)+0x1]&0x8) |
412 | { |
9115e7d2 |
413 | mod-=(P^1)+((curfreq[P])>>(PSG[(P<<2)+0x1]&7)); |
c62d2810 |
414 | |
415 | if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/) |
416 | { |
417 | curfreq[P]+=mod; |
418 | } |
419 | } |
420 | else |
421 | { |
422 | mod=curfreq[P]>>(PSG[(P<<2)+0x1]&7); |
423 | if((mod+curfreq[P])&0x800) |
424 | { |
425 | sweepon[P]=0; |
426 | curfreq[P]=0; |
427 | } |
428 | else |
429 | { |
430 | if(curfreq[P] && (PSG[(P<<2)+0x1]&7)/* && sweepon[P]&0x80*/) |
431 | { |
432 | curfreq[P]+=mod; |
433 | } |
434 | } |
435 | } |
436 | } |
437 | } |
9115e7d2 |
438 | } |
c62d2810 |
439 | } |
440 | |
441 | if(PSG[0x15]&0x8 && sqnon&8) |
442 | { |
443 | if(!(PSG[0xC]&0x20)) |
444 | { |
445 | if(lengthcount[3]>0) |
446 | { |
447 | lengthcount[3]--; |
448 | if(lengthcount[3]<=0) |
449 | { |
450 | sqnon&=~8; |
451 | } |
452 | } |
453 | } |
454 | } |
455 | |
456 | case 0: /* Envelope decay + linear counter */ |
457 | if(!trimode) |
9115e7d2 |
458 | { |
c62d2810 |
459 | laster=0; |
460 | if(tricoop) |
461 | { |
d447f17f |
462 | if(tricoop==1) DoTriangle(0); |
c62d2810 |
463 | tricoop--; |
464 | } |
465 | } |
466 | |
467 | for(P=0;P<2;P++) |
468 | { |
469 | if(DecCountTo1[P]>0) DecCountTo1[P]--; |
470 | if(DecCountTo1[P]<=0) |
471 | { |
472 | DecCountTo1[P]=(PSG[P<<2]&0xF)+1; |
473 | if(decvolume[P] || PSG[P<<2]&0x20) |
474 | { |
475 | decvolume[P]--; |
476 | /* Step from 0 to full volume seems to take twice as long |
477 | as the other steps. I don't know if this is the correct |
478 | way to double its length, though(or if it even matters). |
479 | */ |
480 | if((PSG[P<<2]&0x20) && (decvolume[P]==0)) |
481 | DecCountTo1[P]<<=1; |
482 | decvolume[P]&=15; |
483 | } |
484 | } |
485 | if(!(PSG[P<<2]&0x10)) |
486 | realvolume[P]=decvolume[P]; |
487 | } |
488 | |
489 | if(DecCountTo1[2]>0) DecCountTo1[2]--; |
490 | if(DecCountTo1[2]<=0) |
491 | { |
492 | DecCountTo1[2]=(PSG[0xC]&0xF)+1; |
493 | if(decvolume[2] || PSG[0xC]&0x20) |
494 | { |
495 | decvolume[2]--; |
496 | /* Step from 0 to full volume seems to take twice as long |
497 | as the other steps. I don't know if this is the correct |
498 | way to double its length, though(or if it even matters). |
499 | */ |
500 | if((PSG[0xC]&0x20) && (decvolume[2]==0)) |
501 | DecCountTo1[2]<<=1; |
502 | decvolume[2]&=15; |
503 | } |
504 | } |
505 | if(!(PSG[0xC]&0x10)) |
506 | realvolume[2]=decvolume[2]; |
507 | |
508 | break; |
509 | } |
510 | |
511 | } |
512 | |
513 | void FrameSoundUpdate(void) |
514 | { |
515 | // Linear counter: Bit 0-6 of $4008 |
516 | // Length counter: Bit 4-7 of $4003, $4007, $400b, $400f |
517 | |
518 | if(fcnt==3) |
519 | { |
520 | if(PSG[0x17]&0x80) |
521 | fhcnt+=fhinc; |
522 | if(!(PSG[0x17]&0xC0)) |
523 | { |
524 | SIRQStat|=0x40; |
525 | X6502_IRQBegin(FCEU_IQFCOUNT); |
526 | } |
527 | } |
528 | //if(SIRQStat&0x40) X6502_IRQBegin(FCEU_IQFCOUNT); |
529 | FrameSoundStuff(fcnt); |
530 | fcnt=(fcnt+1)&3; |
531 | } |
532 | |
533 | static uint32 ChannelBC[5]; |
534 | |
535 | static uint32 RectAmp[2][8]; |
536 | |
537 | static void FASTAPASS(1) CalcRectAmp(int P) |
538 | { |
539 | static int tal[4]={1,2,4,6}; |
540 | int V; |
541 | int x; |
542 | uint32 *b=RectAmp[P]; |
543 | int m; |
544 | |
545 | //if(PSG[P<<2]&0x10) |
546 | V=realvolume[P]<<4; |
547 | //V=(PSG[P<<2]&15)<<4; |
548 | //else |
549 | // V=decvolume[P]<<4; |
550 | m=tal[(PSG[P<<2]&0xC0)>>6]; |
551 | for(x=0;x<m;x++,b++) |
552 | *b=0; |
553 | for(;x<8;x++,b++) |
554 | *b=V; |
555 | } |
556 | |
d447f17f |
557 | static void RDoPCM(int32 end) |
c62d2810 |
558 | { |
559 | int32 V; |
d447f17f |
560 | int32 start; |
ec4d13a3 |
561 | int32 freq; |
c62d2810 |
562 | uint32 out=PSG[0x11]<<3; |
563 | |
564 | start=ChannelBC[4]; |
d447f17f |
565 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
566 | if(end<=start) return; |
567 | ChannelBC[4]=end; |
568 | |
569 | if(PSG[0x15]&0x10) |
570 | { |
571 | freq=PCMfreq; |
ec4d13a3 |
572 | freq<<=18; |
c62d2810 |
573 | |
574 | for(V=start;V<end;V++) |
575 | { |
a384bf44 |
576 | PCMacc-=nesincsize; |
c62d2810 |
577 | if(PCMacc<=0) |
578 | { |
579 | if(!PCMBitIndex) |
580 | { |
581 | PCMSizeIndex--; |
582 | if(!PCMSizeIndex) |
583 | { |
584 | if(PSG[0x10]&0x40) |
585 | PrepDPCM(); |
586 | else |
587 | { |
588 | PSG[0x15]&=~0x10; |
589 | for(;V<end;V++) |
590 | Wave[V>>4]+=PSG[0x11]<<3; |
591 | goto endopcmo; |
592 | } |
593 | } |
594 | else |
595 | { |
596 | PCMBuffer=ARead[0x8000+PCMAddressIndex](0x8000+PCMAddressIndex); |
597 | PCMAddressIndex=(PCMAddressIndex+1)&0x7fff; |
598 | } |
599 | } |
600 | |
601 | { |
602 | int t=(((PCMBuffer>>PCMBitIndex)&1)<<2)-2; |
603 | uint8 bah=PSG[0x11]; |
604 | |
605 | PCMacc+=freq; |
606 | PSG[0x11]+=t; |
607 | if(PSG[0x11]&0x80) |
608 | PSG[0x11]=bah; |
609 | else |
610 | out=PSG[0x11]<<3; |
611 | } |
612 | PCMBitIndex=(PCMBitIndex+1)&7; |
613 | } |
614 | Wave[V>>4]+=out; //(PSG[0x11]-64)<<3; |
615 | } |
616 | } |
617 | else |
618 | { |
619 | if((end-start)>64) |
620 | { |
621 | for(V=start;V<=(start|15);V++) |
622 | Wave[V>>4]+=out; |
623 | out<<=4; |
624 | for(V=(start>>4)+1;V<(end>>4);V++) |
625 | Wave[V]+=out; |
626 | out>>=4; |
627 | for(V=end&(~15);V<end;V++) |
628 | Wave[V>>4]+=out; |
629 | } |
630 | else |
631 | for(V=start;V<end;V++) |
632 | Wave[V>>4]+=out; |
633 | } |
634 | endopcmo:; |
635 | } |
636 | |
d447f17f |
637 | static void RDoSQ1(int32 end) |
c62d2810 |
638 | { |
639 | int32 V; |
d447f17f |
640 | int32 start; |
ec4d13a3 |
641 | int32 freq; |
c62d2810 |
642 | |
c62d2810 |
643 | start=ChannelBC[0]; |
d447f17f |
644 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
645 | if(end<=start) return; |
646 | ChannelBC[0]=end; |
647 | |
d447f17f |
648 | if(!(PSG[0x15]&1 && sqnon&1)) |
649 | return; |
650 | |
c62d2810 |
651 | if(curfreq[0]<8 || curfreq[0]>0x7ff) |
652 | return; |
653 | if(!CheckFreq(curfreq[0],PSG[0x1])) |
654 | return; |
655 | |
d447f17f |
656 | CalcRectAmp(0); |
657 | |
c62d2810 |
658 | { |
659 | uint32 out=RectAmp[0][DutyCount[0]]; |
660 | freq=curfreq[0]+1; |
661 | { |
ec4d13a3 |
662 | freq<<=18; |
c62d2810 |
663 | for(V=start;V<end;V++) |
664 | { |
665 | Wave[V>>4]+=out; |
a384bf44 |
666 | sqacc[0]-=nesincsize; |
c62d2810 |
667 | if(sqacc[0]<=0) |
668 | { |
669 | rea: |
670 | sqacc[0]+=freq; |
671 | DutyCount[0]++; |
672 | if(sqacc[0]<=0) goto rea; |
673 | |
674 | DutyCount[0]&=7; |
675 | out=RectAmp[0][DutyCount[0]]; |
676 | } |
c62d2810 |
677 | } |
c62d2810 |
678 | } |
d447f17f |
679 | } |
c62d2810 |
680 | } |
681 | |
d447f17f |
682 | static void RDoSQ2(int32 end) |
c62d2810 |
683 | { |
684 | int32 V; |
d447f17f |
685 | int32 start; |
ec4d13a3 |
686 | int32 freq; |
c62d2810 |
687 | |
c62d2810 |
688 | start=ChannelBC[1]; |
d447f17f |
689 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
690 | if(end<=start) return; |
691 | ChannelBC[1]=end; |
692 | |
d447f17f |
693 | if(!(PSG[0x15]&2 && sqnon&2)) |
694 | return; |
695 | |
c62d2810 |
696 | if(curfreq[1]<8 || curfreq[1]>0x7ff) |
697 | return; |
698 | if(!CheckFreq(curfreq[1],PSG[0x5])) |
699 | return; |
700 | |
d447f17f |
701 | CalcRectAmp(1); |
702 | |
c62d2810 |
703 | { |
704 | uint32 out=RectAmp[1][DutyCount[1]]; |
705 | freq=curfreq[1]+1; |
706 | |
707 | { |
ec4d13a3 |
708 | freq<<=18; |
c62d2810 |
709 | for(V=start;V<end;V++) |
710 | { |
711 | Wave[V>>4]+=out; |
a384bf44 |
712 | sqacc[1]-=nesincsize; |
c62d2810 |
713 | if(sqacc[1]<=0) |
714 | { |
715 | rea: |
716 | sqacc[1]+=freq; |
717 | DutyCount[1]++; |
718 | if(sqacc[1]<=0) goto rea; |
719 | |
720 | DutyCount[1]&=7; |
721 | out=RectAmp[1][DutyCount[1]]; |
722 | } |
c62d2810 |
723 | } |
c62d2810 |
724 | } |
d447f17f |
725 | } |
c62d2810 |
726 | } |
727 | |
728 | |
d447f17f |
729 | static void RDoTriangle(int32 end) |
c62d2810 |
730 | { |
731 | static uint32 tcout=0; |
732 | int32 V; |
d447f17f |
733 | int32 start; //,freq; |
ec4d13a3 |
734 | int32 freq=(((PSG[0xa]|((PSG[0xb]&7)<<8))+1)); |
c62d2810 |
735 | |
736 | start=ChannelBC[2]; |
d447f17f |
737 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
738 | if(end<=start) return; |
739 | ChannelBC[2]=end; |
740 | |
741 | if(! (PSG[0x15]&0x4 && sqnon&4 && tricoop) ) |
742 | { // Counter is halted, but we still need to output. |
743 | for(V=start;V<end;V++) |
744 | Wave[V>>4]+=tcout; |
745 | } |
746 | else if(freq<=4) // 55.9Khz - Might be barely audible on a real NES, but |
747 | // it's too costly to generate audio at this high of a frequency |
748 | // (55.9Khz * 32 for the stepping). |
749 | // The same could probably be said for ~27.8Khz, so we'll |
750 | // take care of that too. We'll just output the average |
751 | // value(15/2 - scaled properly for our output format, of course). |
752 | // We'll also take care of ~18Khz and ~14Khz too, since they should be barely audible. |
753 | // (Some proof or anything to confirm/disprove this would be nice.). |
754 | { |
755 | for(V=start;V<end;V++) |
756 | Wave[V>>4]+=((0xF<<4)+(0xF<<2))>>1; |
757 | } |
758 | else |
759 | { |
ec4d13a3 |
760 | static int32 triacc=0; |
9115e7d2 |
761 | static uint8 tc=0; |
c62d2810 |
762 | |
ec4d13a3 |
763 | freq<<=17; |
c62d2810 |
764 | for(V=start;V<end;V++) |
765 | { |
a384bf44 |
766 | triacc-=nesincsize; |
c62d2810 |
767 | if(triacc<=0) |
768 | { |
769 | rea: |
770 | triacc+=freq; //t; |
771 | tc=(tc+1)&0x1F; |
772 | if(triacc<=0) goto rea; |
773 | |
774 | tcout=(tc&0xF); |
775 | if(tc&0x10) tcout^=0xF; |
776 | tcout=(tcout<<4)+(tcout<<2); |
777 | } |
778 | Wave[V>>4]+=tcout; |
779 | } |
780 | } |
781 | } |
782 | |
d447f17f |
783 | static void RDoNoise(int32 end) |
c62d2810 |
784 | { |
785 | int32 inc,V; |
d447f17f |
786 | int32 start; |
c62d2810 |
787 | |
788 | start=ChannelBC[3]; |
d447f17f |
789 | if(end==0) end=(SOUNDTS<<16)/soundtsinc; |
c62d2810 |
790 | if(end<=start) return; |
791 | ChannelBC[3]=end; |
792 | |
793 | if(PSG[0x15]&0x8 && sqnon&8) |
794 | { |
795 | uint32 outo; |
796 | uint32 amptab[2]; |
797 | uint8 amplitude; |
9115e7d2 |
798 | |
c62d2810 |
799 | amplitude=realvolume[2]; |
800 | //if(PSG[0xC]&0x10) |
801 | // amplitude=(PSG[0xC]&0xF); |
9115e7d2 |
802 | //else |
c62d2810 |
803 | // amplitude=decvolume[2]&0xF; |
804 | |
9115e7d2 |
805 | inc=NoiseFreqTable[PSG[0xE]&0xF]; |
c62d2810 |
806 | amptab[0]=((amplitude<<2)+amplitude+amplitude)<<1; |
807 | amptab[1]=0; |
808 | outo=amptab[nreg&1]; |
809 | |
9115e7d2 |
810 | if(amplitude) |
c62d2810 |
811 | { |
9115e7d2 |
812 | if(PSG[0xE]&0x80) // "short" noise |
c62d2810 |
813 | for(V=start;V<end;V++) |
9115e7d2 |
814 | { |
c62d2810 |
815 | Wave[V>>4]+=outo; |
816 | if(count[3]>=inc) |
9115e7d2 |
817 | { |
818 | uint8 feedback; |
c62d2810 |
819 | |
820 | feedback=((nreg>>8)&1)^((nreg>>14)&1); |
821 | nreg=(nreg<<1)+feedback; |
822 | nreg&=0x7fff; |
823 | outo=amptab[nreg&1]; |
824 | count[3]-=inc; |
825 | } |
826 | count[3]+=0x1000; |
827 | } |
828 | else |
829 | for(V=start;V<end;V++) |
830 | { |
831 | Wave[V>>4]+=outo; |
832 | if(count[3]>=inc) |
833 | { |
834 | uint8 feedback; |
835 | |
836 | feedback=((nreg>>13)&1)^((nreg>>14)&1); |
837 | nreg=(nreg<<1)+feedback; |
838 | nreg&=0x7fff; |
839 | outo=amptab[nreg&1]; |
840 | count[3]-=inc; |
841 | } |
842 | count[3]+=0x1000; |
843 | } |
844 | } |
c62d2810 |
845 | } |
846 | } |
847 | |
77887306 |
848 | DECLFW(Write_IRQFM) |
d97315ac |
849 | { |
ea80a45b |
850 | PSG[0x17]=V; |
d97315ac |
851 | V=(V&0xC0)>>6; |
852 | fcnt=0; |
853 | if(V&0x2) |
854 | FrameSoundUpdate(); |
855 | fcnt=1; |
856 | fhcnt=fhinc; |
857 | X6502_IRQEnd(FCEU_IQFCOUNT); |
858 | SIRQStat&=~0x40; |
ea80a45b |
859 | //IRQFrameMode=V; // IRQFrameMode is PSG[0x17] upper bits |
d97315ac |
860 | } |
861 | |
c62d2810 |
862 | void SetNESSoundMap(void) |
9115e7d2 |
863 | { |
c62d2810 |
864 | SetWriteHandler(0x4000,0x4013,Write_PSG); |
865 | SetWriteHandler(0x4011,0x4011,Write0x11); |
866 | SetWriteHandler(0x4015,0x4015,Write_PSG); |
d97315ac |
867 | SetWriteHandler(0x4017,0x4017,Write_IRQFM); |
c62d2810 |
868 | SetReadHandler(0x4015,0x4015,Read_PSG); |
869 | } |
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 |
7b356ee3 |
875 | static int32 flt_acc=0, flt_acc2=0; |
876 | |
d447f17f |
877 | static void FilterSound(uint32 *in, int16 *outMono, int count) |
c62d2810 |
878 | { |
d447f17f |
879 | // static int min=0, max=0; |
0ab4d38f |
880 | int sh=2; |
881 | if (soundvol < 5) sh += 5 - soundvol; |
ec4d13a3 |
882 | |
883 | for(;count;count--,in++,outMono++) |
c62d2810 |
884 | { |
ec4d13a3 |
885 | int32 diff; |
c62d2810 |
886 | |
7b356ee3 |
887 | diff = *in - flt_acc; |
c62d2810 |
888 | |
7b356ee3 |
889 | flt_acc += (diff*highp)>>16; |
890 | flt_acc2+= (int32) (((int64)((diff-flt_acc2)*lowp))>>16); |
c62d2810 |
891 | *in=0; |
9115e7d2 |
892 | |
0ab4d38f |
893 | *outMono = flt_acc2*7 >> sh; // * 7 >> 2 = * 1.75 |
d447f17f |
894 | // if (acc2 < min) { printf("min: %i %04x\n", acc2, acc2); min = acc2; } |
895 | // if (acc2 > max) { printf("max: %i %04x\n", acc2, acc2); max = acc2; } |
c62d2810 |
896 | } |
897 | } |
898 | |
5232c20c |
899 | |
900 | |
d97315ac |
901 | static int32 inbuf=0; |
c62d2810 |
902 | int FlushEmulateSound(void) |
903 | { |
c62d2810 |
904 | int x; |
4fdfab07 |
905 | uint32 end; |
5232c20c |
906 | |
c62d2810 |
907 | if(!timestamp) return(0); |
908 | |
5232c20c |
909 | if(!FSettings.SndRate || (soundvol == 0)) |
c62d2810 |
910 | { |
911 | end=0; |
912 | goto nosoundo; |
913 | } |
914 | |
4fdfab07 |
915 | end=(SOUNDTS<<16)/soundtsinc; |
d447f17f |
916 | DoSQ1(end); |
917 | DoSQ2(end); |
918 | DoTriangle(end); |
919 | DoNoise(end); |
920 | DoPCM(end); |
c62d2810 |
921 | |
922 | if(GameExpSound.Fill) |
923 | GameExpSound.Fill(end&0xF); |
924 | |
d447f17f |
925 | FilterSound(Wave,WaveFinalMono,end>>4); |
c62d2810 |
926 | |
927 | if(end&0xF) |
928 | Wave[0]=Wave[(end>>4)]; |
9115e7d2 |
929 | Wave[(end>>4)]=0; |
c62d2810 |
930 | |
931 | nosoundo: |
932 | for(x=0;x<5;x++) |
933 | ChannelBC[x]=end&0xF; |
4fdfab07 |
934 | soundtsoffs=(soundtsinc*(end&0xF))>>16; |
d97315ac |
935 | end>>=4; |
936 | inbuf=end; |
937 | return(end); |
c62d2810 |
938 | } |
939 | |
c4980f9e |
940 | int GetSoundBuffer(int16 **W) |
c62d2810 |
941 | { |
c4980f9e |
942 | *W=WaveFinalMono; |
d97315ac |
943 | return inbuf; |
c62d2810 |
944 | } |
945 | |
946 | void PowerSound(void) |
947 | { |
948 | int x; |
949 | |
950 | SetNESSoundMap(); |
951 | |
952 | for(x=0;x<0x16;x++) |
953 | if(x!=0x14) |
954 | BWrite[0x4000+x](0x4000+x,0); |
955 | PSG[0x17]=0; //x40; |
956 | fhcnt=fhinc; |
957 | fcnt=0; |
958 | nreg=1; |
4fdfab07 |
959 | soundtsoffs=0; |
c62d2810 |
960 | } |
961 | |
962 | void ResetSound(void) |
963 | { |
964 | int x; |
965 | for(x=0;x<0x16;x++) |
966 | if(x!=1 && x!=5 && x!=0x14) BWrite[0x4000+x](0x4000+x,0); |
967 | PSG[0x17]=0; |
968 | fhcnt=fhinc; |
969 | fcnt=0; |
970 | nreg=1; |
971 | } |
972 | |
77887306 |
973 | void SetSoundVariables(void) |
c62d2810 |
974 | { |
9115e7d2 |
975 | int x; |
c62d2810 |
976 | |
977 | fhinc=PAL?16626:14915; // *2 CPU clock rate |
978 | fhinc*=24; |
979 | for(x=0;x<0x20;x++) |
980 | lengthtable[x]=Slengthtable[x]<<1; |
981 | |
982 | if(FSettings.SndRate) |
983 | { |
984 | DoNoise=RDoNoise; |
985 | DoTriangle=RDoTriangle; |
986 | DoPCM=RDoPCM; |
987 | DoSQ1=RDoSQ1; |
988 | DoSQ2=RDoSQ2; |
9115e7d2 |
989 | } |
c62d2810 |
990 | else |
991 | { |
992 | DoNoise=DoTriangle=DoPCM=DoSQ1=DoSQ2=Dummyfunc; |
993 | } |
994 | |
995 | if(!FSettings.SndRate) return; |
996 | if(GameExpSound.RChange) |
997 | GameExpSound.RChange(); |
998 | |
ec4d13a3 |
999 | // nesincsizeLL=(int64)((int64)562949953421312*(double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate OVERSAMPLE)); |
a384bf44 |
1000 | nesincsize=(int32)(((int64)1<<17)*(double)(PAL?PAL_CPU:NTSC_CPU)/(FSettings.SndRate * 16)); // 308845 - 1832727 |
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 | } |