| 1 | /***************************************************************************\r |
| 2 | registers.c - description\r |
| 3 | -------------------\r |
| 4 | begin : Wed May 15 2002\r |
| 5 | copyright : (C) 2002 by Pete Bernert\r |
| 6 | email : BlackDove@addcom.de\r |
| 7 | ***************************************************************************/\r |
| 8 | /***************************************************************************\r |
| 9 | * *\r |
| 10 | * This program is free software; you can redistribute it and/or modify *\r |
| 11 | * it under the terms of the GNU General Public License as published by *\r |
| 12 | * the Free Software Foundation; either version 2 of the License, or *\r |
| 13 | * (at your option) any later version. See also the license.txt file for *\r |
| 14 | * additional informations. *\r |
| 15 | * *\r |
| 16 | ***************************************************************************/\r |
| 17 | \r |
| 18 | #include "stdafx.h"\r |
| 19 | \r |
| 20 | #define _IN_REGISTERS\r |
| 21 | \r |
| 22 | #include "externals.h"\r |
| 23 | #include "registers.h"\r |
| 24 | \r |
| 25 | /*\r |
| 26 | // adsr time values (in ms) by James Higgs ... see the end of\r |
| 27 | // the adsr.c source for details\r |
| 28 | \r |
| 29 | #define ATTACK_MS 514L\r |
| 30 | #define DECAYHALF_MS 292L\r |
| 31 | #define DECAY_MS 584L\r |
| 32 | #define SUSTAIN_MS 450L\r |
| 33 | #define RELEASE_MS 446L\r |
| 34 | */\r |
| 35 | \r |
| 36 | // we have a timebase of 1.020408f ms, not 1 ms... so adjust adsr defines\r |
| 37 | #define ATTACK_MS 494L\r |
| 38 | #define DECAYHALF_MS 286L\r |
| 39 | #define DECAY_MS 572L\r |
| 40 | #define SUSTAIN_MS 441L\r |
| 41 | #define RELEASE_MS 437L\r |
| 42 | \r |
| 43 | static void SoundOn(int start,int end,unsigned short val);\r |
| 44 | static void SoundOff(int start,int end,unsigned short val);\r |
| 45 | static void FModOn(int start,int end,unsigned short val);\r |
| 46 | static void NoiseOn(int start,int end,unsigned short val);\r |
| 47 | static void SetVolumeL(unsigned char ch,short vol);\r |
| 48 | static void SetVolumeR(unsigned char ch,short vol);\r |
| 49 | static void SetPitch(int ch,unsigned short val);\r |
| 50 | static void ReverbOn(int start,int end,unsigned short val);\r |
| 51 | \r |
| 52 | ////////////////////////////////////////////////////////////////////////\r |
| 53 | // WRITE REGISTERS: called by main emu\r |
| 54 | ////////////////////////////////////////////////////////////////////////\r |
| 55 | \r |
| 56 | void CALLBACK SPUwriteRegister(unsigned long reg, unsigned short val)\r |
| 57 | {\r |
| 58 | const unsigned long r=reg&0xfff;\r |
| 59 | regArea[(r-0xc00)>>1] = val;\r |
| 60 | \r |
| 61 | if(r>=0x0c00 && r<0x0d80) // some channel info?\r |
| 62 | {\r |
| 63 | int ch=(r>>4)-0xc0; // calc channel\r |
| 64 | switch(r&0x0f)\r |
| 65 | {\r |
| 66 | //------------------------------------------------// r volume\r |
| 67 | case 0: \r |
| 68 | SetVolumeL((unsigned char)ch,val);\r |
| 69 | break;\r |
| 70 | //------------------------------------------------// l volume\r |
| 71 | case 2: \r |
| 72 | SetVolumeR((unsigned char)ch,val);\r |
| 73 | break;\r |
| 74 | //------------------------------------------------// pitch\r |
| 75 | case 4: \r |
| 76 | SetPitch(ch,val);\r |
| 77 | break;\r |
| 78 | //------------------------------------------------// start\r |
| 79 | case 6: \r |
| 80 | // taken from regArea later\r |
| 81 | break;\r |
| 82 | //------------------------------------------------// level with pre-calcs\r |
| 83 | case 8:\r |
| 84 | {\r |
| 85 | const unsigned long lval=val;\r |
| 86 | //---------------------------------------------//\r |
| 87 | s_chan[ch].ADSRX.AttackModeExp=(lval&0x8000)?1:0; \r |
| 88 | s_chan[ch].ADSRX.AttackRate=(lval>>8) & 0x007f;\r |
| 89 | s_chan[ch].ADSRX.DecayRate=(lval>>4) & 0x000f;\r |
| 90 | s_chan[ch].ADSRX.SustainLevel=lval & 0x000f;\r |
| 91 | //---------------------------------------------//\r |
| 92 | #if 0\r |
| 93 | if(!iDebugMode) break;\r |
| 94 | //---------------------------------------------// stuff below is only for debug mode\r |
| 95 | \r |
| 96 | s_chan[ch].ADSR.AttackModeExp=(lval&0x8000)?1:0; //0x007f\r |
| 97 | \r |
| 98 | lx=(((lval>>8) & 0x007f)>>2); // attack time to run from 0 to 100% volume\r |
| 99 | lx=min(31,lx); // no overflow on shift!\r |
| 100 | if(lx) \r |
| 101 | { \r |
| 102 | lx = (1<<lx);\r |
| 103 | if(lx<2147483) lx=(lx*ATTACK_MS)/10000L; // another overflow check\r |
| 104 | else lx=(lx/10000L)*ATTACK_MS;\r |
| 105 | if(!lx) lx=1;\r |
| 106 | }\r |
| 107 | s_chan[ch].ADSR.AttackTime=lx; \r |
| 108 | \r |
| 109 | s_chan[ch].ADSR.SustainLevel= // our adsr vol runs from 0 to 1024, so scale the sustain level\r |
| 110 | (1024*((lval) & 0x000f))/15;\r |
| 111 | \r |
| 112 | lx=(lval>>4) & 0x000f; // decay:\r |
| 113 | if(lx) // our const decay value is time it takes from 100% to 0% of volume\r |
| 114 | {\r |
| 115 | lx = ((1<<(lx))*DECAY_MS)/10000L;\r |
| 116 | if(!lx) lx=1;\r |
| 117 | }\r |
| 118 | s_chan[ch].ADSR.DecayTime = // so calc how long does it take to run from 100% to the wanted sus level\r |
| 119 | (lx*(1024-s_chan[ch].ADSR.SustainLevel))/1024;\r |
| 120 | #endif\r |
| 121 | }\r |
| 122 | break;\r |
| 123 | //------------------------------------------------// adsr times with pre-calcs\r |
| 124 | case 10:\r |
| 125 | {\r |
| 126 | const unsigned long lval=val;\r |
| 127 | \r |
| 128 | //----------------------------------------------//\r |
| 129 | s_chan[ch].ADSRX.SustainModeExp = (lval&0x8000)?1:0;\r |
| 130 | s_chan[ch].ADSRX.SustainIncrease= (lval&0x4000)?0:1;\r |
| 131 | s_chan[ch].ADSRX.SustainRate = (lval>>6) & 0x007f;\r |
| 132 | s_chan[ch].ADSRX.ReleaseModeExp = (lval&0x0020)?1:0;\r |
| 133 | s_chan[ch].ADSRX.ReleaseRate = lval & 0x001f;\r |
| 134 | //----------------------------------------------//\r |
| 135 | #if 0\r |
| 136 | if(!iDebugMode) break;\r |
| 137 | //----------------------------------------------// stuff below is only for debug mode\r |
| 138 | \r |
| 139 | s_chan[ch].ADSR.SustainModeExp = (lval&0x8000)?1:0;\r |
| 140 | s_chan[ch].ADSR.ReleaseModeExp = (lval&0x0020)?1:0;\r |
| 141 | \r |
| 142 | lx=((((lval>>6) & 0x007f)>>2)); // sustain time... often very high\r |
| 143 | lx=min(31,lx); // values are used to hold the volume\r |
| 144 | if(lx) // until a sound stop occurs\r |
| 145 | { // the highest value we reach (due to \r |
| 146 | lx = (1<<lx); // overflow checking) is: \r |
| 147 | if(lx<2147483) lx=(lx*SUSTAIN_MS)/10000L; // 94704 seconds = 1578 minutes = 26 hours... \r |
| 148 | else lx=(lx/10000L)*SUSTAIN_MS; // should be enuff... if the stop doesn't \r |
| 149 | if(!lx) lx=1; // come in this time span, I don't care :)\r |
| 150 | }\r |
| 151 | s_chan[ch].ADSR.SustainTime = lx;\r |
| 152 | \r |
| 153 | lx=(lval & 0x001f);\r |
| 154 | s_chan[ch].ADSR.ReleaseVal =lx;\r |
| 155 | if(lx) // release time from 100% to 0%\r |
| 156 | { // note: the release time will be\r |
| 157 | lx = (1<<lx); // adjusted when a stop is coming,\r |
| 158 | if(lx<2147483) lx=(lx*RELEASE_MS)/10000L; // so at this time the adsr vol will \r |
| 159 | else lx=(lx/10000L)*RELEASE_MS; // run from (current volume) to 0%\r |
| 160 | if(!lx) lx=1;\r |
| 161 | }\r |
| 162 | s_chan[ch].ADSR.ReleaseTime=lx;\r |
| 163 | \r |
| 164 | if(lval & 0x4000) // add/dec flag\r |
| 165 | s_chan[ch].ADSR.SustainModeDec=-1;\r |
| 166 | else s_chan[ch].ADSR.SustainModeDec=1;\r |
| 167 | #endif\r |
| 168 | }\r |
| 169 | break;\r |
| 170 | //------------------------------------------------// adsr volume... mmm have to investigate this\r |
| 171 | case 12:\r |
| 172 | break;\r |
| 173 | //------------------------------------------------//\r |
| 174 | case 14: // loop?\r |
| 175 | s_chan[ch].pLoop=spuMemC+((val&~1)<<3);\r |
| 176 | break;\r |
| 177 | //------------------------------------------------//\r |
| 178 | }\r |
| 179 | return;\r |
| 180 | }\r |
| 181 | \r |
| 182 | switch(r)\r |
| 183 | {\r |
| 184 | //-------------------------------------------------//\r |
| 185 | case H_SPUaddr:\r |
| 186 | spuAddr = (unsigned long) val<<3;\r |
| 187 | break;\r |
| 188 | //-------------------------------------------------//\r |
| 189 | case H_SPUdata:\r |
| 190 | spuMem[spuAddr>>1] = val;\r |
| 191 | spuAddr+=2;\r |
| 192 | if(spuAddr>0x7ffff) spuAddr=0;\r |
| 193 | break;\r |
| 194 | //-------------------------------------------------//\r |
| 195 | case H_SPUctrl:\r |
| 196 | if(!(spuCtrl & CTRL_IRQ))\r |
| 197 | spuStat&=~STAT_IRQ;\r |
| 198 | spuCtrl=val;\r |
| 199 | break;\r |
| 200 | //-------------------------------------------------//\r |
| 201 | case H_SPUstat:\r |
| 202 | spuStat=val & 0xf800;\r |
| 203 | break;\r |
| 204 | //-------------------------------------------------//\r |
| 205 | case H_SPUReverbAddr:\r |
| 206 | if(val==0xFFFF || val<=0x200)\r |
| 207 | {rvb.StartAddr=rvb.CurrAddr=0;}\r |
| 208 | else\r |
| 209 | {\r |
| 210 | const long iv=(unsigned long)val<<2;\r |
| 211 | if(rvb.StartAddr!=iv)\r |
| 212 | {\r |
| 213 | rvb.StartAddr=(unsigned long)val<<2;\r |
| 214 | rvb.CurrAddr=rvb.StartAddr;\r |
| 215 | // sync-with-decode-buffers hack..\r |
| 216 | if(rvb.StartAddr==0x3ff00)\r |
| 217 | rvb.CurrAddr+=decode_pos/2;\r |
| 218 | }\r |
| 219 | }\r |
| 220 | rvb.dirty = 1;\r |
| 221 | break;\r |
| 222 | //-------------------------------------------------//\r |
| 223 | case H_SPUirqAddr:\r |
| 224 | spuIrq = val;\r |
| 225 | pSpuIrq=spuMemC+(((unsigned long) val<<3)&~0xf);\r |
| 226 | break;\r |
| 227 | //-------------------------------------------------//\r |
| 228 | case H_SPUrvolL:\r |
| 229 | rvb.VolLeft=val;\r |
| 230 | break;\r |
| 231 | //-------------------------------------------------//\r |
| 232 | case H_SPUrvolR:\r |
| 233 | rvb.VolRight=val;\r |
| 234 | break;\r |
| 235 | //-------------------------------------------------//\r |
| 236 | \r |
| 237 | /*\r |
| 238 | case H_ExtLeft:\r |
| 239 | //auxprintf("EL %d\n",val);\r |
| 240 | break;\r |
| 241 | //-------------------------------------------------//\r |
| 242 | case H_ExtRight:\r |
| 243 | //auxprintf("ER %d\n",val);\r |
| 244 | break;\r |
| 245 | //-------------------------------------------------//\r |
| 246 | case H_SPUmvolL:\r |
| 247 | //auxprintf("ML %d\n",val);\r |
| 248 | break;\r |
| 249 | //-------------------------------------------------//\r |
| 250 | case H_SPUmvolR:\r |
| 251 | //auxprintf("MR %d\n",val);\r |
| 252 | break;\r |
| 253 | //-------------------------------------------------//\r |
| 254 | case H_SPUMute1:\r |
| 255 | //auxprintf("M0 %04x\n",val);\r |
| 256 | break;\r |
| 257 | //-------------------------------------------------//\r |
| 258 | case H_SPUMute2:\r |
| 259 | //auxprintf("M1 %04x\n",val);\r |
| 260 | break;\r |
| 261 | */\r |
| 262 | //-------------------------------------------------//\r |
| 263 | case H_SPUon1:\r |
| 264 | SoundOn(0,16,val);\r |
| 265 | break;\r |
| 266 | //-------------------------------------------------//\r |
| 267 | case H_SPUon2:\r |
| 268 | SoundOn(16,24,val);\r |
| 269 | break;\r |
| 270 | //-------------------------------------------------//\r |
| 271 | case H_SPUoff1:\r |
| 272 | SoundOff(0,16,val);\r |
| 273 | break;\r |
| 274 | //-------------------------------------------------//\r |
| 275 | case H_SPUoff2:\r |
| 276 | SoundOff(16,24,val);\r |
| 277 | break;\r |
| 278 | //-------------------------------------------------//\r |
| 279 | case H_CDLeft:\r |
| 280 | iLeftXAVol=val & 0x7fff;\r |
| 281 | if(cddavCallback) cddavCallback(0,val);\r |
| 282 | break;\r |
| 283 | case H_CDRight:\r |
| 284 | iRightXAVol=val & 0x7fff;\r |
| 285 | if(cddavCallback) cddavCallback(1,val);\r |
| 286 | break;\r |
| 287 | //-------------------------------------------------//\r |
| 288 | case H_FMod1:\r |
| 289 | FModOn(0,16,val);\r |
| 290 | break;\r |
| 291 | //-------------------------------------------------//\r |
| 292 | case H_FMod2:\r |
| 293 | FModOn(16,24,val);\r |
| 294 | break;\r |
| 295 | //-------------------------------------------------//\r |
| 296 | case H_Noise1:\r |
| 297 | NoiseOn(0,16,val);\r |
| 298 | break;\r |
| 299 | //-------------------------------------------------//\r |
| 300 | case H_Noise2:\r |
| 301 | NoiseOn(16,24,val);\r |
| 302 | break;\r |
| 303 | //-------------------------------------------------//\r |
| 304 | case H_RVBon1:\r |
| 305 | ReverbOn(0,16,val);\r |
| 306 | break;\r |
| 307 | //-------------------------------------------------//\r |
| 308 | case H_RVBon2:\r |
| 309 | ReverbOn(16,24,val);\r |
| 310 | break;\r |
| 311 | //-------------------------------------------------//\r |
| 312 | case H_Reverb+0 : rvb.FB_SRC_A=val*4; break;\r |
| 313 | case H_Reverb+2 : rvb.FB_SRC_B=val*4; break;\r |
| 314 | case H_Reverb+4 : rvb.IIR_ALPHA=(short)val; break;\r |
| 315 | case H_Reverb+6 : rvb.ACC_COEF_A=(short)val; break;\r |
| 316 | case H_Reverb+8 : rvb.ACC_COEF_B=(short)val; break;\r |
| 317 | case H_Reverb+10 : rvb.ACC_COEF_C=(short)val; break;\r |
| 318 | case H_Reverb+12 : rvb.ACC_COEF_D=(short)val; break;\r |
| 319 | case H_Reverb+14 : rvb.IIR_COEF=(short)val; break;\r |
| 320 | case H_Reverb+16 : rvb.FB_ALPHA=(short)val; break;\r |
| 321 | case H_Reverb+18 : rvb.FB_X=(short)val; break;\r |
| 322 | case H_Reverb+20 : rvb.IIR_DEST_A0=val*4; break;\r |
| 323 | case H_Reverb+22 : rvb.IIR_DEST_A1=val*4; break;\r |
| 324 | case H_Reverb+24 : rvb.ACC_SRC_A0=val*4; break;\r |
| 325 | case H_Reverb+26 : rvb.ACC_SRC_A1=val*4; break;\r |
| 326 | case H_Reverb+28 : rvb.ACC_SRC_B0=val*4; break;\r |
| 327 | case H_Reverb+30 : rvb.ACC_SRC_B1=val*4; break;\r |
| 328 | case H_Reverb+32 : rvb.IIR_SRC_A0=val*4; break;\r |
| 329 | case H_Reverb+34 : rvb.IIR_SRC_A1=val*4; break;\r |
| 330 | case H_Reverb+36 : rvb.IIR_DEST_B0=val*4; break;\r |
| 331 | case H_Reverb+38 : rvb.IIR_DEST_B1=val*4; break;\r |
| 332 | case H_Reverb+40 : rvb.ACC_SRC_C0=val*4; break;\r |
| 333 | case H_Reverb+42 : rvb.ACC_SRC_C1=val*4; break;\r |
| 334 | case H_Reverb+44 : rvb.ACC_SRC_D0=val*4; break;\r |
| 335 | case H_Reverb+46 : rvb.ACC_SRC_D1=val*4; break;\r |
| 336 | case H_Reverb+48 : rvb.IIR_SRC_B1=val*4; break;\r |
| 337 | case H_Reverb+50 : rvb.IIR_SRC_B0=val*4; break;\r |
| 338 | case H_Reverb+52 : rvb.MIX_DEST_A0=val*4; break;\r |
| 339 | case H_Reverb+54 : rvb.MIX_DEST_A1=val*4; break;\r |
| 340 | case H_Reverb+56 : rvb.MIX_DEST_B0=val*4; break;\r |
| 341 | case H_Reverb+58 : rvb.MIX_DEST_B1=val*4; break;\r |
| 342 | case H_Reverb+60 : rvb.IN_COEF_L=(short)val; break;\r |
| 343 | case H_Reverb+62 : rvb.IN_COEF_R=(short)val; break;\r |
| 344 | }\r |
| 345 | \r |
| 346 | if ((r & ~0x3f) == H_Reverb)\r |
| 347 | rvb.dirty = 1; // recalculate on next update\r |
| 348 | }\r |
| 349 | \r |
| 350 | ////////////////////////////////////////////////////////////////////////\r |
| 351 | // READ REGISTER: called by main emu\r |
| 352 | ////////////////////////////////////////////////////////////////////////\r |
| 353 | \r |
| 354 | unsigned short CALLBACK SPUreadRegister(unsigned long reg)\r |
| 355 | {\r |
| 356 | const unsigned long r=reg&0xfff;\r |
| 357 | \r |
| 358 | if(r>=0x0c00 && r<0x0d80)\r |
| 359 | {\r |
| 360 | switch(r&0x0f)\r |
| 361 | {\r |
| 362 | case 12: // get adsr vol\r |
| 363 | {\r |
| 364 | const int ch=(r>>4)-0xc0;\r |
| 365 | if(dwNewChannel&(1<<ch)) return 1; // we are started, but not processed? return 1\r |
| 366 | if((dwChannelOn&(1<<ch)) && // same here... we haven't decoded one sample yet, so no envelope yet. return 1 as well\r |
| 367 | !s_chan[ch].ADSRX.EnvelopeVol)\r |
| 368 | return 1;\r |
| 369 | return (unsigned short)(s_chan[ch].ADSRX.EnvelopeVol>>16);\r |
| 370 | }\r |
| 371 | \r |
| 372 | case 14: // get loop address\r |
| 373 | {\r |
| 374 | const int ch=(r>>4)-0xc0;\r |
| 375 | return (unsigned short)((s_chan[ch].pLoop-spuMemC)>>3);\r |
| 376 | }\r |
| 377 | }\r |
| 378 | }\r |
| 379 | \r |
| 380 | switch(r)\r |
| 381 | {\r |
| 382 | case H_SPUctrl:\r |
| 383 | return spuCtrl;\r |
| 384 | \r |
| 385 | case H_SPUstat:\r |
| 386 | return spuStat;\r |
| 387 | \r |
| 388 | case H_SPUaddr:\r |
| 389 | return (unsigned short)(spuAddr>>3);\r |
| 390 | \r |
| 391 | case H_SPUdata:\r |
| 392 | {\r |
| 393 | unsigned short s=spuMem[spuAddr>>1];\r |
| 394 | spuAddr+=2;\r |
| 395 | if(spuAddr>0x7ffff) spuAddr=0;\r |
| 396 | return s;\r |
| 397 | }\r |
| 398 | \r |
| 399 | case H_SPUirqAddr:\r |
| 400 | return spuIrq;\r |
| 401 | \r |
| 402 | //case H_SPUIsOn1:\r |
| 403 | // return IsSoundOn(0,16);\r |
| 404 | \r |
| 405 | //case H_SPUIsOn2:\r |
| 406 | // return IsSoundOn(16,24);\r |
| 407 | \r |
| 408 | }\r |
| 409 | \r |
| 410 | return regArea[(r-0xc00)>>1];\r |
| 411 | }\r |
| 412 | \r |
| 413 | ////////////////////////////////////////////////////////////////////////\r |
| 414 | // SOUND ON register write\r |
| 415 | ////////////////////////////////////////////////////////////////////////\r |
| 416 | \r |
| 417 | static void SoundOn(int start,int end,unsigned short val)\r |
| 418 | {\r |
| 419 | int ch;\r |
| 420 | \r |
| 421 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r |
| 422 | {\r |
| 423 | if((val&1) && regAreaGet(ch,6)) // mmm... start has to be set before key on !?!\r |
| 424 | {\r |
| 425 | // do this here, not in StartSound\r |
| 426 | // - fixes fussy timing issues\r |
| 427 | s_chan[ch].bStop=0;\r |
| 428 | s_chan[ch].pCurr=spuMemC+((regAreaGet(ch,6)&~1)<<3); // must be block aligned\r |
| 429 | s_chan[ch].pLoop=spuMemC+((regAreaGet(ch,14)&~1)<<3);\r |
| 430 | s_chan[ch].prevflags=2;\r |
| 431 | \r |
| 432 | dwNewChannel|=(1<<ch); // bitfield for faster testing\r |
| 433 | dwChannelOn|=1<<ch;\r |
| 434 | dwChannelDead&=~(1<<ch);\r |
| 435 | }\r |
| 436 | }\r |
| 437 | }\r |
| 438 | \r |
| 439 | ////////////////////////////////////////////////////////////////////////\r |
| 440 | // SOUND OFF register write\r |
| 441 | ////////////////////////////////////////////////////////////////////////\r |
| 442 | \r |
| 443 | static void SoundOff(int start,int end,unsigned short val)\r |
| 444 | {\r |
| 445 | int ch;\r |
| 446 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r |
| 447 | {\r |
| 448 | if(val&1) // && s_chan[i].bOn) mmm...\r |
| 449 | {\r |
| 450 | s_chan[ch].bStop=1;\r |
| 451 | \r |
| 452 | // Jungle Book - Rhythm 'n Groove\r |
| 453 | // - turns off buzzing sound (loop hangs)\r |
| 454 | dwNewChannel &= ~(1<<ch);\r |
| 455 | } \r |
| 456 | }\r |
| 457 | }\r |
| 458 | \r |
| 459 | ////////////////////////////////////////////////////////////////////////\r |
| 460 | // FMOD register write\r |
| 461 | ////////////////////////////////////////////////////////////////////////\r |
| 462 | \r |
| 463 | static void FModOn(int start,int end,unsigned short val)\r |
| 464 | {\r |
| 465 | int ch;\r |
| 466 | \r |
| 467 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r |
| 468 | {\r |
| 469 | if(val&1) // -> fmod on/off\r |
| 470 | {\r |
| 471 | if(ch>0) \r |
| 472 | {\r |
| 473 | s_chan[ch].bFMod=1; // --> sound channel\r |
| 474 | s_chan[ch-1].bFMod=2; // --> freq channel\r |
| 475 | }\r |
| 476 | }\r |
| 477 | else\r |
| 478 | {\r |
| 479 | s_chan[ch].bFMod=0; // --> turn off fmod\r |
| 480 | if(ch>0&&s_chan[ch-1].bFMod==2)\r |
| 481 | s_chan[ch-1].bFMod=0;\r |
| 482 | }\r |
| 483 | }\r |
| 484 | }\r |
| 485 | \r |
| 486 | ////////////////////////////////////////////////////////////////////////\r |
| 487 | // NOISE register write\r |
| 488 | ////////////////////////////////////////////////////////////////////////\r |
| 489 | \r |
| 490 | static void NoiseOn(int start,int end,unsigned short val)\r |
| 491 | {\r |
| 492 | int ch;\r |
| 493 | \r |
| 494 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r |
| 495 | {\r |
| 496 | s_chan[ch].bNoise=val&1; // -> noise on/off\r |
| 497 | }\r |
| 498 | }\r |
| 499 | \r |
| 500 | ////////////////////////////////////////////////////////////////////////\r |
| 501 | // LEFT VOLUME register write\r |
| 502 | ////////////////////////////////////////////////////////////////////////\r |
| 503 | \r |
| 504 | // please note: sweep and phase invert are wrong... but I've never seen\r |
| 505 | // them used\r |
| 506 | \r |
| 507 | static void SetVolumeL(unsigned char ch,short vol) // LEFT VOLUME\r |
| 508 | {\r |
| 509 | if(vol&0x8000) // sweep?\r |
| 510 | {\r |
| 511 | short sInc=1; // -> sweep up?\r |
| 512 | if(vol&0x2000) sInc=-1; // -> or down?\r |
| 513 | if(vol&0x1000) vol^=0xffff; // -> mmm... phase inverted? have to investigate this\r |
| 514 | vol=((vol&0x7f)+1)/2; // -> sweep: 0..127 -> 0..64\r |
| 515 | vol+=vol/(2*sInc); // -> HACK: we don't sweep right now, so we just raise/lower the volume by the half!\r |
| 516 | vol*=128;\r |
| 517 | }\r |
| 518 | else // no sweep:\r |
| 519 | {\r |
| 520 | if(vol&0x4000) // -> mmm... phase inverted? have to investigate this\r |
| 521 | //vol^=0xffff;\r |
| 522 | vol=0x3fff-(vol&0x3fff);\r |
| 523 | }\r |
| 524 | \r |
| 525 | vol&=0x3fff;\r |
| 526 | s_chan[ch].iLeftVolume=vol; // store volume\r |
| 527 | }\r |
| 528 | \r |
| 529 | ////////////////////////////////////////////////////////////////////////\r |
| 530 | // RIGHT VOLUME register write\r |
| 531 | ////////////////////////////////////////////////////////////////////////\r |
| 532 | \r |
| 533 | static void SetVolumeR(unsigned char ch,short vol) // RIGHT VOLUME\r |
| 534 | {\r |
| 535 | if(vol&0x8000) // comments... see above :)\r |
| 536 | {\r |
| 537 | short sInc=1;\r |
| 538 | if(vol&0x2000) sInc=-1;\r |
| 539 | if(vol&0x1000) vol^=0xffff;\r |
| 540 | vol=((vol&0x7f)+1)/2; \r |
| 541 | vol+=vol/(2*sInc);\r |
| 542 | vol*=128;\r |
| 543 | }\r |
| 544 | else \r |
| 545 | {\r |
| 546 | if(vol&0x4000) //vol=vol^=0xffff;\r |
| 547 | vol=0x3fff-(vol&0x3fff);\r |
| 548 | }\r |
| 549 | \r |
| 550 | vol&=0x3fff;\r |
| 551 | \r |
| 552 | s_chan[ch].iRightVolume=vol;\r |
| 553 | }\r |
| 554 | \r |
| 555 | ////////////////////////////////////////////////////////////////////////\r |
| 556 | // PITCH register write\r |
| 557 | ////////////////////////////////////////////////////////////////////////\r |
| 558 | \r |
| 559 | static void SetPitch(int ch,unsigned short val) // SET PITCH\r |
| 560 | {\r |
| 561 | int NP;\r |
| 562 | if(val>0x3fff) NP=0x3fff; // get pitch val\r |
| 563 | else NP=val;\r |
| 564 | \r |
| 565 | s_chan[ch].iRawPitch=NP;\r |
| 566 | s_chan[ch].sinc=(NP<<4)|8;\r |
| 567 | if(iUseInterpolation==1) s_chan[ch].SB[32]=1; // -> freq change in simple interpolation mode: set flag\r |
| 568 | }\r |
| 569 | \r |
| 570 | ////////////////////////////////////////////////////////////////////////\r |
| 571 | // REVERB register write\r |
| 572 | ////////////////////////////////////////////////////////////////////////\r |
| 573 | \r |
| 574 | static void ReverbOn(int start,int end,unsigned short val)\r |
| 575 | {\r |
| 576 | int ch;\r |
| 577 | \r |
| 578 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r |
| 579 | {\r |
| 580 | s_chan[ch].bReverb=val&1; // -> reverb on/off\r |
| 581 | }\r |
| 582 | }\r |