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