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ef79bbde P |
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 | |
ef79bbde | 24 | \r |
7e44d49d | 25 | static void SoundOn(int start,int end,unsigned short val);\r |
26 | static void SoundOff(int start,int end,unsigned short val);\r | |
27 | static void FModOn(int start,int end,unsigned short val);\r | |
28 | static void NoiseOn(int start,int end,unsigned short val);\r | |
29 | static void SetVolumeL(unsigned char ch,short vol);\r | |
30 | static void SetVolumeR(unsigned char ch,short vol);\r | |
31 | static void SetPitch(int ch,unsigned short val);\r | |
32 | static void ReverbOn(int start,int end,unsigned short val);\r | |
33 | \r | |
ef79bbde P |
34 | ////////////////////////////////////////////////////////////////////////\r |
35 | // WRITE REGISTERS: called by main emu\r | |
36 | ////////////////////////////////////////////////////////////////////////\r | |
37 | \r | |
650adfd2 | 38 | static const uint32_t ignore_dupe[8] = {\r |
39 | // ch 0-15 c40 c80 cc0\r | |
40 | 0x7f7f7f7f, 0x7f7f7f7f, 0x7f7f7f7f, 0x7f7f7f7f,\r | |
41 | // ch 16-24 d40 control reverb\r | |
42 | 0x7f7f7f7f, 0x7f7f7f7f, 0xff05ff0f, 0xffffffff\r | |
43 | };\r | |
44 | \r | |
45 | void CALLBACK SPUwriteRegister(unsigned long reg, unsigned short val,\r | |
46 | unsigned int cycles)\r | |
ef79bbde | 47 | {\r |
650adfd2 | 48 | int r = reg & 0xfff;\r |
49 | int rofs = (r - 0xc00) >> 1;\r | |
50 | int changed = regArea[rofs] != val;\r | |
51 | regArea[rofs] = val;\r | |
52 | \r | |
53 | if (!changed && (ignore_dupe[rofs >> 5] & (1 << (rofs & 0x1f))))\r | |
54 | return;\r | |
55 | // zero keyon/keyoff?\r | |
56 | if (val == 0 && (r & 0xff8) == 0xd88)\r | |
57 | return;\r | |
58 | \r | |
59 | do_samples_if_needed(cycles);\r | |
ef79bbde P |
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 | |
650adfd2 | 77 | goto upd_irq;\r |
ef79bbde P |
78 | //------------------------------------------------// start\r |
79 | case 6: \r | |
7e44d49d | 80 | // taken from regArea later\r |
ef79bbde P |
81 | break;\r |
82 | //------------------------------------------------// level with pre-calcs\r | |
83 | case 8:\r | |
84 | {\r | |
6d866bb7 | 85 | const unsigned long lval=val;\r |
ef79bbde P |
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 | |
ef79bbde P |
92 | }\r |
93 | break;\r | |
94 | //------------------------------------------------// adsr times with pre-calcs\r | |
95 | case 10:\r | |
96 | {\r | |
6d866bb7 | 97 | const unsigned long lval=val;\r |
ef79bbde P |
98 | \r |
99 | //----------------------------------------------//\r | |
100 | s_chan[ch].ADSRX.SustainModeExp = (lval&0x8000)?1:0;\r | |
101 | s_chan[ch].ADSRX.SustainIncrease= (lval&0x4000)?0:1;\r | |
102 | s_chan[ch].ADSRX.SustainRate = (lval>>6) & 0x007f;\r | |
103 | s_chan[ch].ADSRX.ReleaseModeExp = (lval&0x0020)?1:0;\r | |
104 | s_chan[ch].ADSRX.ReleaseRate = lval & 0x001f;\r | |
105 | //----------------------------------------------//\r | |
ef79bbde P |
106 | }\r |
107 | break;\r | |
108 | //------------------------------------------------// adsr volume... mmm have to investigate this\r | |
109 | case 12:\r | |
110 | break;\r | |
111 | //------------------------------------------------//\r | |
112 | case 14: // loop?\r | |
7e44d49d | 113 | s_chan[ch].pLoop=spuMemC+((val&~1)<<3);\r |
650adfd2 | 114 | goto upd_irq;\r |
ef79bbde P |
115 | //------------------------------------------------//\r |
116 | }\r | |
ef79bbde P |
117 | return;\r |
118 | }\r | |
119 | \r | |
120 | switch(r)\r | |
121 | {\r | |
122 | //-------------------------------------------------//\r | |
123 | case H_SPUaddr:\r | |
124 | spuAddr = (unsigned long) val<<3;\r | |
125 | break;\r | |
126 | //-------------------------------------------------//\r | |
127 | case H_SPUdata:\r | |
128 | spuMem[spuAddr>>1] = val;\r | |
129 | spuAddr+=2;\r | |
130 | if(spuAddr>0x7ffff) spuAddr=0;\r | |
131 | break;\r | |
132 | //-------------------------------------------------//\r | |
133 | case H_SPUctrl:\r | |
650adfd2 | 134 | if (!(spuCtrl & CTRL_IRQ)) {\r |
3fc2a4c2 | 135 | spuStat&=~STAT_IRQ;\r |
650adfd2 | 136 | if (val & CTRL_IRQ)\r |
137 | schedule_next_irq();\r | |
138 | }\r | |
ef79bbde P |
139 | spuCtrl=val;\r |
140 | break;\r | |
141 | //-------------------------------------------------//\r | |
142 | case H_SPUstat:\r | |
143 | spuStat=val & 0xf800;\r | |
144 | break;\r | |
145 | //-------------------------------------------------//\r | |
146 | case H_SPUReverbAddr:\r | |
147 | if(val==0xFFFF || val<=0x200)\r | |
148 | {rvb.StartAddr=rvb.CurrAddr=0;}\r | |
149 | else\r | |
150 | {\r | |
151 | const long iv=(unsigned long)val<<2;\r | |
152 | if(rvb.StartAddr!=iv)\r | |
153 | {\r | |
154 | rvb.StartAddr=(unsigned long)val<<2;\r | |
155 | rvb.CurrAddr=rvb.StartAddr;\r | |
156 | }\r | |
157 | }\r | |
650adfd2 | 158 | goto rvbd;\r |
ef79bbde P |
159 | //-------------------------------------------------//\r |
160 | case H_SPUirqAddr:\r | |
161 | spuIrq = val;\r | |
3fc2a4c2 | 162 | pSpuIrq=spuMemC+(((unsigned long) val<<3)&~0xf);\r |
650adfd2 | 163 | goto upd_irq;\r |
ef79bbde P |
164 | //-------------------------------------------------//\r |
165 | case H_SPUrvolL:\r | |
166 | rvb.VolLeft=val;\r | |
167 | break;\r | |
168 | //-------------------------------------------------//\r | |
169 | case H_SPUrvolR:\r | |
170 | rvb.VolRight=val;\r | |
171 | break;\r | |
172 | //-------------------------------------------------//\r | |
173 | \r | |
174 | /*\r | |
175 | case H_ExtLeft:\r | |
176 | //auxprintf("EL %d\n",val);\r | |
177 | break;\r | |
178 | //-------------------------------------------------//\r | |
179 | case H_ExtRight:\r | |
180 | //auxprintf("ER %d\n",val);\r | |
181 | break;\r | |
182 | //-------------------------------------------------//\r | |
183 | case H_SPUmvolL:\r | |
184 | //auxprintf("ML %d\n",val);\r | |
185 | break;\r | |
186 | //-------------------------------------------------//\r | |
187 | case H_SPUmvolR:\r | |
188 | //auxprintf("MR %d\n",val);\r | |
189 | break;\r | |
190 | //-------------------------------------------------//\r | |
191 | case H_SPUMute1:\r | |
192 | //auxprintf("M0 %04x\n",val);\r | |
193 | break;\r | |
194 | //-------------------------------------------------//\r | |
195 | case H_SPUMute2:\r | |
196 | //auxprintf("M1 %04x\n",val);\r | |
197 | break;\r | |
198 | */\r | |
199 | //-------------------------------------------------//\r | |
200 | case H_SPUon1:\r | |
201 | SoundOn(0,16,val);\r | |
202 | break;\r | |
203 | //-------------------------------------------------//\r | |
204 | case H_SPUon2:\r | |
205 | SoundOn(16,24,val);\r | |
206 | break;\r | |
207 | //-------------------------------------------------//\r | |
208 | case H_SPUoff1:\r | |
209 | SoundOff(0,16,val);\r | |
210 | break;\r | |
211 | //-------------------------------------------------//\r | |
212 | case H_SPUoff2:\r | |
213 | SoundOff(16,24,val);\r | |
214 | break;\r | |
215 | //-------------------------------------------------//\r | |
216 | case H_CDLeft:\r | |
217 | iLeftXAVol=val & 0x7fff;\r | |
218 | if(cddavCallback) cddavCallback(0,val);\r | |
219 | break;\r | |
220 | case H_CDRight:\r | |
221 | iRightXAVol=val & 0x7fff;\r | |
222 | if(cddavCallback) cddavCallback(1,val);\r | |
223 | break;\r | |
224 | //-------------------------------------------------//\r | |
225 | case H_FMod1:\r | |
226 | FModOn(0,16,val);\r | |
227 | break;\r | |
228 | //-------------------------------------------------//\r | |
229 | case H_FMod2:\r | |
230 | FModOn(16,24,val);\r | |
231 | break;\r | |
232 | //-------------------------------------------------//\r | |
233 | case H_Noise1:\r | |
234 | NoiseOn(0,16,val);\r | |
235 | break;\r | |
236 | //-------------------------------------------------//\r | |
237 | case H_Noise2:\r | |
238 | NoiseOn(16,24,val);\r | |
239 | break;\r | |
240 | //-------------------------------------------------//\r | |
241 | case H_RVBon1:\r | |
242 | ReverbOn(0,16,val);\r | |
243 | break;\r | |
244 | //-------------------------------------------------//\r | |
245 | case H_RVBon2:\r | |
246 | ReverbOn(16,24,val);\r | |
247 | break;\r | |
248 | //-------------------------------------------------//\r | |
650adfd2 | 249 | case H_Reverb+0 : rvb.FB_SRC_A=val*4; goto rvbd;\r |
250 | case H_Reverb+2 : rvb.FB_SRC_B=val*4; goto rvbd;\r | |
251 | case H_Reverb+4 : rvb.IIR_ALPHA=(short)val; goto rvbd;\r | |
252 | case H_Reverb+6 : rvb.ACC_COEF_A=(short)val; goto rvbd;\r | |
253 | case H_Reverb+8 : rvb.ACC_COEF_B=(short)val; goto rvbd;\r | |
254 | case H_Reverb+10 : rvb.ACC_COEF_C=(short)val; goto rvbd;\r | |
255 | case H_Reverb+12 : rvb.ACC_COEF_D=(short)val; goto rvbd;\r | |
256 | case H_Reverb+14 : rvb.IIR_COEF=(short)val; goto rvbd;\r | |
257 | case H_Reverb+16 : rvb.FB_ALPHA=(short)val; goto rvbd;\r | |
258 | case H_Reverb+18 : rvb.FB_X=(short)val; goto rvbd;\r | |
259 | case H_Reverb+20 : rvb.IIR_DEST_A0=val*4; goto rvbd;\r | |
260 | case H_Reverb+22 : rvb.IIR_DEST_A1=val*4; goto rvbd;\r | |
261 | case H_Reverb+24 : rvb.ACC_SRC_A0=val*4; goto rvbd;\r | |
262 | case H_Reverb+26 : rvb.ACC_SRC_A1=val*4; goto rvbd;\r | |
263 | case H_Reverb+28 : rvb.ACC_SRC_B0=val*4; goto rvbd;\r | |
264 | case H_Reverb+30 : rvb.ACC_SRC_B1=val*4; goto rvbd;\r | |
265 | case H_Reverb+32 : rvb.IIR_SRC_A0=val*4; goto rvbd;\r | |
266 | case H_Reverb+34 : rvb.IIR_SRC_A1=val*4; goto rvbd;\r | |
267 | case H_Reverb+36 : rvb.IIR_DEST_B0=val*4; goto rvbd;\r | |
268 | case H_Reverb+38 : rvb.IIR_DEST_B1=val*4; goto rvbd;\r | |
269 | case H_Reverb+40 : rvb.ACC_SRC_C0=val*4; goto rvbd;\r | |
270 | case H_Reverb+42 : rvb.ACC_SRC_C1=val*4; goto rvbd;\r | |
271 | case H_Reverb+44 : rvb.ACC_SRC_D0=val*4; goto rvbd;\r | |
272 | case H_Reverb+46 : rvb.ACC_SRC_D1=val*4; goto rvbd;\r | |
273 | case H_Reverb+48 : rvb.IIR_SRC_B1=val*4; goto rvbd;\r | |
274 | case H_Reverb+50 : rvb.IIR_SRC_B0=val*4; goto rvbd;\r | |
275 | case H_Reverb+52 : rvb.MIX_DEST_A0=val*4; goto rvbd;\r | |
276 | case H_Reverb+54 : rvb.MIX_DEST_A1=val*4; goto rvbd;\r | |
277 | case H_Reverb+56 : rvb.MIX_DEST_B0=val*4; goto rvbd;\r | |
278 | case H_Reverb+58 : rvb.MIX_DEST_B1=val*4; goto rvbd;\r | |
279 | case H_Reverb+60 : rvb.IN_COEF_L=(short)val; goto rvbd;\r | |
280 | case H_Reverb+62 : rvb.IN_COEF_R=(short)val; goto rvbd;\r | |
ef79bbde | 281 | }\r |
650adfd2 | 282 | return;\r |
283 | \r | |
284 | upd_irq:\r | |
285 | if (spuCtrl & CTRL_IRQ)\r | |
286 | schedule_next_irq();\r | |
287 | return;\r | |
ef79bbde | 288 | \r |
650adfd2 | 289 | rvbd:\r |
290 | rvb.dirty = 1; // recalculate on next update\r | |
ef79bbde P |
291 | }\r |
292 | \r | |
293 | ////////////////////////////////////////////////////////////////////////\r | |
294 | // READ REGISTER: called by main emu\r | |
295 | ////////////////////////////////////////////////////////////////////////\r | |
296 | \r | |
297 | unsigned short CALLBACK SPUreadRegister(unsigned long reg)\r | |
298 | {\r | |
299 | const unsigned long r=reg&0xfff;\r | |
300 | \r | |
ef79bbde P |
301 | if(r>=0x0c00 && r<0x0d80)\r |
302 | {\r | |
303 | switch(r&0x0f)\r | |
304 | {\r | |
305 | case 12: // get adsr vol\r | |
306 | {\r | |
307 | const int ch=(r>>4)-0xc0;\r | |
6d866bb7 | 308 | if(dwNewChannel&(1<<ch)) return 1; // we are started, but not processed? return 1\r |
309 | if((dwChannelOn&(1<<ch)) && // same here... we haven't decoded one sample yet, so no envelope yet. return 1 as well\r | |
310 | !s_chan[ch].ADSRX.EnvelopeVol)\r | |
ef79bbde P |
311 | return 1;\r |
312 | return (unsigned short)(s_chan[ch].ADSRX.EnvelopeVol>>16);\r | |
313 | }\r | |
314 | \r | |
315 | case 14: // get loop address\r | |
316 | {\r | |
317 | const int ch=(r>>4)-0xc0;\r | |
ef79bbde P |
318 | return (unsigned short)((s_chan[ch].pLoop-spuMemC)>>3);\r |
319 | }\r | |
320 | }\r | |
321 | }\r | |
322 | \r | |
323 | switch(r)\r | |
324 | {\r | |
325 | case H_SPUctrl:\r | |
326 | return spuCtrl;\r | |
327 | \r | |
328 | case H_SPUstat:\r | |
329 | return spuStat;\r | |
330 | \r | |
331 | case H_SPUaddr:\r | |
332 | return (unsigned short)(spuAddr>>3);\r | |
333 | \r | |
334 | case H_SPUdata:\r | |
335 | {\r | |
336 | unsigned short s=spuMem[spuAddr>>1];\r | |
337 | spuAddr+=2;\r | |
338 | if(spuAddr>0x7ffff) spuAddr=0;\r | |
339 | return s;\r | |
340 | }\r | |
341 | \r | |
342 | case H_SPUirqAddr:\r | |
343 | return spuIrq;\r | |
344 | \r | |
345 | //case H_SPUIsOn1:\r | |
346 | // return IsSoundOn(0,16);\r | |
347 | \r | |
348 | //case H_SPUIsOn2:\r | |
349 | // return IsSoundOn(16,24);\r | |
350 | \r | |
351 | }\r | |
352 | \r | |
353 | return regArea[(r-0xc00)>>1];\r | |
354 | }\r | |
355 | \r | |
356 | ////////////////////////////////////////////////////////////////////////\r | |
357 | // SOUND ON register write\r | |
358 | ////////////////////////////////////////////////////////////////////////\r | |
359 | \r | |
7e44d49d | 360 | static void SoundOn(int start,int end,unsigned short val)\r |
ef79bbde P |
361 | {\r |
362 | int ch;\r | |
363 | \r | |
364 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r | |
365 | {\r | |
77d6fd63 | 366 | if((val&1) && regAreaGet(ch,6)) // mmm... start has to be set before key on !?!\r |
ef79bbde | 367 | {\r |
b00afb77 | 368 | // do this here, not in StartSound\r |
369 | // - fixes fussy timing issues\r | |
370 | s_chan[ch].bStop=0;\r | |
77d6fd63 | 371 | s_chan[ch].pCurr=spuMemC+((regAreaGet(ch,6)&~1)<<3); // must be block aligned\r |
372 | s_chan[ch].pLoop=spuMemC+((regAreaGet(ch,14)&~1)<<3);\r | |
e4f075af | 373 | s_chan[ch].prevflags=2;\r |
b00afb77 | 374 | \r |
ef79bbde | 375 | dwNewChannel|=(1<<ch); // bitfield for faster testing\r |
6d866bb7 | 376 | dwChannelOn|=1<<ch;\r |
174c454a | 377 | dwChannelDead&=~(1<<ch);\r |
ef79bbde P |
378 | }\r |
379 | }\r | |
380 | }\r | |
381 | \r | |
382 | ////////////////////////////////////////////////////////////////////////\r | |
383 | // SOUND OFF register write\r | |
384 | ////////////////////////////////////////////////////////////////////////\r | |
385 | \r | |
7e44d49d | 386 | static void SoundOff(int start,int end,unsigned short val)\r |
ef79bbde P |
387 | {\r |
388 | int ch;\r | |
389 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r | |
390 | {\r | |
391 | if(val&1) // && s_chan[i].bOn) mmm...\r | |
392 | {\r | |
393 | s_chan[ch].bStop=1;\r | |
b00afb77 | 394 | \r |
395 | // Jungle Book - Rhythm 'n Groove\r | |
396 | // - turns off buzzing sound (loop hangs)\r | |
b00afb77 | 397 | dwNewChannel &= ~(1<<ch);\r |
ef79bbde P |
398 | } \r |
399 | }\r | |
400 | }\r | |
401 | \r | |
402 | ////////////////////////////////////////////////////////////////////////\r | |
403 | // FMOD register write\r | |
404 | ////////////////////////////////////////////////////////////////////////\r | |
405 | \r | |
7e44d49d | 406 | static void FModOn(int start,int end,unsigned short val)\r |
ef79bbde P |
407 | {\r |
408 | int ch;\r | |
409 | \r | |
410 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r | |
411 | {\r | |
412 | if(val&1) // -> fmod on/off\r | |
413 | {\r | |
414 | if(ch>0) \r | |
415 | {\r | |
416 | s_chan[ch].bFMod=1; // --> sound channel\r | |
417 | s_chan[ch-1].bFMod=2; // --> freq channel\r | |
418 | }\r | |
419 | }\r | |
420 | else\r | |
421 | {\r | |
422 | s_chan[ch].bFMod=0; // --> turn off fmod\r | |
07a6dd2c | 423 | if(ch>0&&s_chan[ch-1].bFMod==2)\r |
424 | s_chan[ch-1].bFMod=0;\r | |
ef79bbde P |
425 | }\r |
426 | }\r | |
427 | }\r | |
428 | \r | |
429 | ////////////////////////////////////////////////////////////////////////\r | |
430 | // NOISE register write\r | |
431 | ////////////////////////////////////////////////////////////////////////\r | |
432 | \r | |
7e44d49d | 433 | static void NoiseOn(int start,int end,unsigned short val)\r |
ef79bbde P |
434 | {\r |
435 | int ch;\r | |
436 | \r | |
437 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r | |
438 | {\r | |
6d866bb7 | 439 | s_chan[ch].bNoise=val&1; // -> noise on/off\r |
ef79bbde P |
440 | }\r |
441 | }\r | |
442 | \r | |
443 | ////////////////////////////////////////////////////////////////////////\r | |
444 | // LEFT VOLUME register write\r | |
445 | ////////////////////////////////////////////////////////////////////////\r | |
446 | \r | |
447 | // please note: sweep and phase invert are wrong... but I've never seen\r | |
448 | // them used\r | |
449 | \r | |
7e44d49d | 450 | static void SetVolumeL(unsigned char ch,short vol) // LEFT VOLUME\r |
ef79bbde | 451 | {\r |
ef79bbde P |
452 | if(vol&0x8000) // sweep?\r |
453 | {\r | |
454 | short sInc=1; // -> sweep up?\r | |
455 | if(vol&0x2000) sInc=-1; // -> or down?\r | |
456 | if(vol&0x1000) vol^=0xffff; // -> mmm... phase inverted? have to investigate this\r | |
457 | vol=((vol&0x7f)+1)/2; // -> sweep: 0..127 -> 0..64\r | |
458 | vol+=vol/(2*sInc); // -> HACK: we don't sweep right now, so we just raise/lower the volume by the half!\r | |
459 | vol*=128;\r | |
460 | }\r | |
461 | else // no sweep:\r | |
462 | {\r | |
463 | if(vol&0x4000) // -> mmm... phase inverted? have to investigate this\r | |
464 | //vol^=0xffff;\r | |
465 | vol=0x3fff-(vol&0x3fff);\r | |
466 | }\r | |
467 | \r | |
468 | vol&=0x3fff;\r | |
469 | s_chan[ch].iLeftVolume=vol; // store volume\r | |
470 | }\r | |
471 | \r | |
472 | ////////////////////////////////////////////////////////////////////////\r | |
473 | // RIGHT VOLUME register write\r | |
474 | ////////////////////////////////////////////////////////////////////////\r | |
475 | \r | |
7e44d49d | 476 | static void SetVolumeR(unsigned char ch,short vol) // RIGHT VOLUME\r |
ef79bbde | 477 | {\r |
ef79bbde P |
478 | if(vol&0x8000) // comments... see above :)\r |
479 | {\r | |
480 | short sInc=1;\r | |
481 | if(vol&0x2000) sInc=-1;\r | |
482 | if(vol&0x1000) vol^=0xffff;\r | |
483 | vol=((vol&0x7f)+1)/2; \r | |
484 | vol+=vol/(2*sInc);\r | |
485 | vol*=128;\r | |
486 | }\r | |
487 | else \r | |
488 | {\r | |
489 | if(vol&0x4000) //vol=vol^=0xffff;\r | |
490 | vol=0x3fff-(vol&0x3fff);\r | |
491 | }\r | |
492 | \r | |
493 | vol&=0x3fff;\r | |
494 | \r | |
495 | s_chan[ch].iRightVolume=vol;\r | |
496 | }\r | |
497 | \r | |
498 | ////////////////////////////////////////////////////////////////////////\r | |
499 | // PITCH register write\r | |
500 | ////////////////////////////////////////////////////////////////////////\r | |
501 | \r | |
7e44d49d | 502 | static void SetPitch(int ch,unsigned short val) // SET PITCH\r |
ef79bbde P |
503 | {\r |
504 | int NP;\r | |
505 | if(val>0x3fff) NP=0x3fff; // get pitch val\r | |
506 | else NP=val;\r | |
507 | \r | |
508 | s_chan[ch].iRawPitch=NP;\r | |
7e44d49d | 509 | s_chan[ch].sinc=(NP<<4)|8;\r |
650adfd2 | 510 | s_chan[ch].sinc_inv=0;\r |
7e44d49d | 511 | if(iUseInterpolation==1) s_chan[ch].SB[32]=1; // -> freq change in simple interpolation mode: set flag\r |
ef79bbde P |
512 | }\r |
513 | \r | |
514 | ////////////////////////////////////////////////////////////////////////\r | |
515 | // REVERB register write\r | |
516 | ////////////////////////////////////////////////////////////////////////\r | |
517 | \r | |
7e44d49d | 518 | static void ReverbOn(int start,int end,unsigned short val)\r |
ef79bbde P |
519 | {\r |
520 | int ch;\r | |
521 | \r | |
522 | for(ch=start;ch<end;ch++,val>>=1) // loop channels\r | |
523 | {\r | |
6d866bb7 | 524 | s_chan[ch].bReverb=val&1; // -> reverb on/off\r |
ef79bbde P |
525 | }\r |
526 | }\r |