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spu: drop unused mono code
[pcsx_rearmed.git] / plugins / dfsound / spu.c
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ef79bbde
P		 1/***************************************************************************
2 spu.c - description
3 -------------------
4 begin : Wed May 15 2002
5 copyright : (C) 2002 by Pete Bernert
6 email : BlackDove@addcom.de
7 ***************************************************************************/
8/***************************************************************************
9 * *
10 * This program is free software; you can redistribute it and/or modify *
11 * it under the terms of the GNU General Public License as published by *
12 * the Free Software Foundation; either version 2 of the License, or *
13 * (at your option) any later version. See also the license.txt file for *
14 * additional informations. *
15 * *
16 ***************************************************************************/
17
18#include "stdafx.h"
19
20#define _IN_SPU
21
22#include "externals.h"
23#include "cfg.h"
24#include "dsoundoss.h"
25#include "regs.h"
26
27#ifdef ENABLE_NLS
28#include <libintl.h>
29#include <locale.h>
30#define _(x) gettext(x)
31#define N_(x) (x)
32#else
33#define _(x) (x)
34#define N_(x) (x)
35#endif
36
6d866bb7 37/*
ef79bbde
P		 38#if defined (USEMACOSX)
39static char * libraryName = N_("Mac OS X Sound");
40#elif defined (USEALSA)
41static char * libraryName = N_("ALSA Sound");
42#elif defined (USEOSS)
43static char * libraryName = N_("OSS Sound");
44#elif defined (USESDL)
45static char * libraryName = N_("SDL Sound");
46#elif defined (USEPULSEAUDIO)
47static char * libraryName = N_("PulseAudio Sound");
48#else
49static char * libraryName = N_("NULL Sound");
50#endif
51
52static char * libraryInfo = N_("P.E.Op.S. Sound Driver V1.7\nCoded by Pete Bernert and the P.E.Op.S. team\n");
6d866bb7 53*/
ef79bbde
P		 54
55// globals
56
57// psx buffer / addresses
58
59unsigned short regArea[10000];
60unsigned short spuMem[256*1024];
61unsigned char * spuMemC;
62unsigned char * pSpuIrq=0;
63unsigned char * pSpuBuffer;
64unsigned char * pMixIrq=0;
65
66// user settings
67
68int iVolume=3;
69int iXAPitch=1;
70int iUseTimer=2;
71int iSPUIRQWait=1;
72int iDebugMode=0;
73int iRecordMode=0;
74int iUseReverb=2;
75int iUseInterpolation=2;
ef79bbde
P		 76
77// MAIN infos struct for each channel
78
79SPUCHAN s_chan[MAXCHAN+1]; // channel + 1 infos (1 is security for fmod handling)
80REVERBInfo rvb;
81
82unsigned long dwNoiseVal=1; // global noise generator
83int iSpuAsyncWait=0;
84
85unsigned short spuCtrl=0; // some vars to store psx reg infos
86unsigned short spuStat=0;
87unsigned short spuIrq=0;
88unsigned long spuAddr=0xffffffff; // address into spu mem
89int bEndThread=0; // thread handlers
90int bThreadEnded=0;
91int bSpuInit=0;
92int bSPUIsOpen=0;
93
94static pthread_t thread = (pthread_t)-1; // thread id (linux)
95
96unsigned long dwNewChannel=0; // flags for faster testing, if new channel starts
6d866bb7 97unsigned long dwChannelOn=0;
ef79bbde
P		 98
99void (CALLBACK *irqCallback)(void)=0; // func of main emu, called on spu irq
100void (CALLBACK *cddavCallback)(unsigned short,unsigned short)=0;
101
102// certain globals (were local before, but with the new timeproc I need em global)
103
6d866bb7 104static const int f[8][2] = { { 0, 0 },
ef79bbde
P		 105 { 60, 0 },
106 { 115, -52 },
107 { 98, -55 },
108 { 122, -60 } };
97ea4077 109int SSumLR[NSSIZE*2];
ef79bbde
P		 110int iFMod[NSSIZE];
111int iCycle = 0;
112short * pS;
113
114int lastch=-1; // last channel processed on spu irq in timer mode
115static int lastns=0; // last ns pos
116static int iSecureStart=0; // secure start counter
117
118////////////////////////////////////////////////////////////////////////
119// CODE AREA
120////////////////////////////////////////////////////////////////////////
121
122// dirty inline func includes
123
124#include "reverb.c"
125#include "adsr.c"
126
127////////////////////////////////////////////////////////////////////////
128// helpers for simple interpolation
129
130//
131// easy interpolation on upsampling, no special filter, just "Pete's common sense" tm
132//
133// instead of having n equal sample values in a row like:
134// ____
135// |____
136//
137// we compare the current delta change with the next delta change.
138//
139// if curr_delta is positive,
140//
141// - and next delta is smaller (or changing direction):
142// \.
143// -__
144//
145// - and next delta significant (at least twice) bigger:
146// --_
147// \.
148//
149// - and next delta is nearly same:
150// \.
151// \.
152//
153//
154// if curr_delta is negative,
155//
156// - and next delta is smaller (or changing direction):
157// _--
158// /
159//
160// - and next delta significant (at least twice) bigger:
161// /
162// __-
163//
164// - and next delta is nearly same:
165// /
166// /
167//
168
169
170INLINE void InterpolateUp(int ch)
171{
172 if(s_chan[ch].SB[32]==1) // flag == 1? calc step and set flag... and don't change the value in this pass
173 {
174 const int id1=s_chan[ch].SB[30]-s_chan[ch].SB[29]; // curr delta to next val
175 const int id2=s_chan[ch].SB[31]-s_chan[ch].SB[30]; // and next delta to next-next val :)
176
177 s_chan[ch].SB[32]=0;
178
179 if(id1>0) // curr delta positive
180 {
181 if(id2<id1)
182 {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
183 else
184 if(id2<(id1<<1))
185 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
186 else
187 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
188 }
189 else // curr delta negative
190 {
191 if(id2>id1)
192 {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
193 else
194 if(id2>(id1<<1))
195 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
196 else
197 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
198 }
199 }
200 else
201 if(s_chan[ch].SB[32]==2) // flag 1: calc step and set flag... and don't change the value in this pass
202 {
203 s_chan[ch].SB[32]=0;
204
205 s_chan[ch].SB[28]=(s_chan[ch].SB[28]*s_chan[ch].sinc)/0x20000L;
206 if(s_chan[ch].sinc<=0x8000)
207 s_chan[ch].SB[29]=s_chan[ch].SB[30]-(s_chan[ch].SB[28]*((0x10000/s_chan[ch].sinc)-1));
208 else s_chan[ch].SB[29]+=s_chan[ch].SB[28];
209 }
210 else // no flags? add bigger val (if possible), calc smaller step, set flag1
211 s_chan[ch].SB[29]+=s_chan[ch].SB[28];
212}
213
214//
215// even easier interpolation on downsampling, also no special filter, again just "Pete's common sense" tm
216//
217
218INLINE void InterpolateDown(int ch)
219{
220 if(s_chan[ch].sinc>=0x20000L) // we would skip at least one val?
221 {
222 s_chan[ch].SB[29]+=(s_chan[ch].SB[30]-s_chan[ch].SB[29])/2; // add easy weight
223 if(s_chan[ch].sinc>=0x30000L) // we would skip even more vals?
224 s_chan[ch].SB[29]+=(s_chan[ch].SB[31]-s_chan[ch].SB[30])/2;// add additional next weight
225 }
226}
227
228////////////////////////////////////////////////////////////////////////
229// helpers for gauss interpolation
230
231#define gval0 (((short*)(&s_chan[ch].SB[29]))[gpos])
232#define gval(x) (((short*)(&s_chan[ch].SB[29]))[(gpos+x)&3])
233
234#include "gauss_i.h"
235
236////////////////////////////////////////////////////////////////////////
237
238#include "xa.c"
239
240////////////////////////////////////////////////////////////////////////
241// START SOUND... called by main thread to setup a new sound on a channel
242////////////////////////////////////////////////////////////////////////
243
244INLINE void StartSound(int ch)
245{
246 StartADSR(ch);
247 StartREVERB(ch);
248
b00afb77 249 // fussy timing issues - do in VoiceOn
250 //s_chan[ch].pCurr=s_chan[ch].pStart; // set sample start
251 //s_chan[ch].bStop=0;
252 //s_chan[ch].bOn=1;
ef79bbde
P		 253
254 s_chan[ch].s_1=0; // init mixing vars
255 s_chan[ch].s_2=0;
256 s_chan[ch].iSBPos=28;
257
ef79bbde
P		 258 s_chan[ch].SB[29]=0; // init our interpolation helpers
259 s_chan[ch].SB[30]=0;
260
261 if(iUseInterpolation>=2) // gauss interpolation?
262 {s_chan[ch].spos=0x30000L;s_chan[ch].SB[28]=0;} // -> start with more decoding
263 else {s_chan[ch].spos=0x10000L;s_chan[ch].SB[31]=0;} // -> no/simple interpolation starts with one 44100 decoding
264
265 dwNewChannel&=~(1<<ch); // clear new channel bit
266}
267
268////////////////////////////////////////////////////////////////////////
269// ALL KIND OF HELPERS
270////////////////////////////////////////////////////////////////////////
271
272INLINE void VoiceChangeFrequency(int ch)
273{
274 s_chan[ch].iUsedFreq=s_chan[ch].iActFreq; // -> take it and calc steps
275 s_chan[ch].sinc=s_chan[ch].iRawPitch<<4;
276 if(!s_chan[ch].sinc) s_chan[ch].sinc=1;
277 if(iUseInterpolation==1) s_chan[ch].SB[32]=1; // -> freq change in simle imterpolation mode: set flag
278}
279
280////////////////////////////////////////////////////////////////////////
281
282INLINE void FModChangeFrequency(int ch,int ns)
283{
284 int NP=s_chan[ch].iRawPitch;
285
286 NP=((32768L+iFMod[ns])*NP)/32768L;
287
288 if(NP>0x3fff) NP=0x3fff;
289 if(NP<0x1) NP=0x1;
290
291 NP=(44100L*NP)/(4096L); // calc frequency
292
293 s_chan[ch].iActFreq=NP;
294 s_chan[ch].iUsedFreq=NP;
295 s_chan[ch].sinc=(((NP/10)<<16)/4410);
296 if(!s_chan[ch].sinc) s_chan[ch].sinc=1;
297 if(iUseInterpolation==1) // freq change in simple interpolation mode
298 s_chan[ch].SB[32]=1;
299 iFMod[ns]=0;
300}
301
302////////////////////////////////////////////////////////////////////////
303
304// noise handler... just produces some noise data
305// surely wrong... and no noise frequency (spuCtrl&0x3f00) will be used...
306// and sometimes the noise will be used as fmod modulation... pfff
307
308INLINE int iGetNoiseVal(int ch)
309{
310 int fa;
311
312 if((dwNoiseVal<<=1)&0x80000000L)
313 {
314 dwNoiseVal^=0x0040001L;
315 fa=((dwNoiseVal>>2)&0x7fff);
316 fa=-fa;
317 }
318 else fa=(dwNoiseVal>>2)&0x7fff;
319
320 // mmm... depending on the noise freq we allow bigger/smaller changes to the previous val
321 fa=s_chan[ch].iOldNoise+((fa-s_chan[ch].iOldNoise)/((0x001f-((spuCtrl&0x3f00)>>9))+1));
322 if(fa>32767L) fa=32767L;
323 if(fa<-32767L) fa=-32767L;
324 s_chan[ch].iOldNoise=fa;
325
326 if(iUseInterpolation<2) // no gauss/cubic interpolation?
327 s_chan[ch].SB[29] = fa; // -> store noise val in "current sample" slot
328 return fa;
329}
330
331////////////////////////////////////////////////////////////////////////
332
333INLINE void StoreInterpolationVal(int ch,int fa)
334{
335 if(s_chan[ch].bFMod==2) // fmod freq channel
336 s_chan[ch].SB[29]=fa;
337 else
338 {
339 if((spuCtrl&0x4000)==0) fa=0; // muted?
340 else // else adjust
341 {
342 if(fa>32767L) fa=32767L;
343 if(fa<-32767L) fa=-32767L;
344 }
345
346 if(iUseInterpolation>=2) // gauss/cubic interpolation
347 {
348 int gpos = s_chan[ch].SB[28];
349 gval0 = fa;
350 gpos = (gpos+1) & 3;
351 s_chan[ch].SB[28] = gpos;
352 }
353 else
354 if(iUseInterpolation==1) // simple interpolation
355 {
356 s_chan[ch].SB[28] = 0;
357 s_chan[ch].SB[29] = s_chan[ch].SB[30]; // -> helpers for simple linear interpolation: delay real val for two slots, and calc the two deltas, for a 'look at the future behaviour'
358 s_chan[ch].SB[30] = s_chan[ch].SB[31];
359 s_chan[ch].SB[31] = fa;
360 s_chan[ch].SB[32] = 1; // -> flag: calc new interolation
361 }
362 else s_chan[ch].SB[29]=fa; // no interpolation
363 }
364}
365
366////////////////////////////////////////////////////////////////////////
367
368INLINE int iGetInterpolationVal(int ch)
369{
370 int fa;
371
372 if(s_chan[ch].bFMod==2) return s_chan[ch].SB[29];
373
374 switch(iUseInterpolation)
375 {
376 //--------------------------------------------------//
377 case 3: // cubic interpolation
378 {
379 long xd;int gpos;
380 xd = ((s_chan[ch].spos) >> 1)+1;
381 gpos = s_chan[ch].SB[28];
382
383 fa = gval(3) - 3*gval(2) + 3*gval(1) - gval0;
384 fa *= (xd - (2<<15)) / 6;
385 fa >>= 15;
386 fa += gval(2) - gval(1) - gval(1) + gval0;
387 fa *= (xd - (1<<15)) >> 1;
388 fa >>= 15;
389 fa += gval(1) - gval0;
390 fa *= xd;
391 fa >>= 15;
392 fa = fa + gval0;
393
394 } break;
395 //--------------------------------------------------//
396 case 2: // gauss interpolation
397 {
398 int vl, vr;int gpos;
399 vl = (s_chan[ch].spos >> 6) & ~3;
400 gpos = s_chan[ch].SB[28];
401 vr=(gauss[vl]*gval0)&~2047;
402 vr+=(gauss[vl+1]*gval(1))&~2047;
403 vr+=(gauss[vl+2]*gval(2))&~2047;
404 vr+=(gauss[vl+3]*gval(3))&~2047;
405 fa = vr>>11;
406 } break;
407 //--------------------------------------------------//
408 case 1: // simple interpolation
409 {
410 if(s_chan[ch].sinc<0x10000L) // -> upsampling?
411 InterpolateUp(ch); // --> interpolate up
412 else InterpolateDown(ch); // --> else down
413 fa=s_chan[ch].SB[29];
414 } break;
415 //--------------------------------------------------//
416 default: // no interpolation
417 {
418 fa=s_chan[ch].SB[29];
419 } break;
420 //--------------------------------------------------//
421 }
422
423 return fa;
424}
425
426////////////////////////////////////////////////////////////////////////
427// MAIN SPU FUNCTION
428// here is the main job handler... thread, timer or direct func call
429// basically the whole sound processing is done in this fat func!
430////////////////////////////////////////////////////////////////////////
431
432// 5 ms waiting phase, if buffer is full and no new sound has to get started
433// .. can be made smaller (smallest val: 1 ms), but bigger waits give
434// better performance
435
436#define PAUSE_W 5
437#define PAUSE_L 5000
438
439////////////////////////////////////////////////////////////////////////
440
441static void *MAINThread(void *arg)
442{
8680e822 443 int s_1,s_2,fa,ns,ns_from,ns_to;
cfe71c00 444#if !defined(_MACOSX) && !defined(__arm__)
ef79bbde
P		 445 int voldiv = iVolume;
446#else
447 const int voldiv = 2;
448#endif
449 unsigned char * start;unsigned int nSample;
450 int ch,predict_nr,shift_factor,flags,d,s;
451 int bIRQReturn=0;
452
453 while(!bEndThread) // until we are shutting down
454 {
455 // ok, at the beginning we are looking if there is
456 // enuff free place in the dsound/oss buffer to
457 // fill in new data, or if there is a new channel to start.
458 // if not, we wait (thread) or return (timer/spuasync)
459 // until enuff free place is available/a new channel gets
460 // started
461
462 if(dwNewChannel) // new channel should start immedately?
463 { // (at least one bit 0 ... MAXCHANNEL is set?)
464 iSecureStart++; // -> set iSecure
465 if(iSecureStart>5) iSecureStart=0; // (if it is set 5 times - that means on 5 tries a new samples has been started - in a row, we will reset it, to give the sound update a chance)
466 }
467 else iSecureStart=0; // 0: no new channel should start
468
469 while(!iSecureStart && !bEndThread && // no new start? no thread end?
470 (SoundGetBytesBuffered()>TESTSIZE)) // and still enuff data in sound buffer?
471 {
472 iSecureStart=0; // reset secure
473
474 if(iUseTimer) return 0; // linux no-thread mode? bye
475 usleep(PAUSE_L); // else sleep for x ms (linux)
476
477 if(dwNewChannel) iSecureStart=1; // if a new channel kicks in (or, of course, sound buffer runs low), we will leave the loop
478 }
479
480 //--------------------------------------------------// continue from irq handling in timer mode?
481
8680e822 482 ns_from=0;
483 ns_to=NSSIZE;
484 ch=0;
ef79bbde
P		 485 if(lastch>=0) // will be -1 if no continue is pending
486 {
8680e822 487 ch=lastch; ns_from=lastns+1; lastch=-1; // -> setup all kind of vars to continue
ef79bbde
P		 488 }
489
490 //--------------------------------------------------//
491 //- main channel loop -//
492 //--------------------------------------------------//
493 {
8680e822 494 for(;ch<MAXCHAN;ch++) // loop em all... we will collect 1 ms of sound of each playing channel
ef79bbde 495 {
6d866bb7 496 if(dwNewChannel&(1<<ch)) StartSound(ch); // start new sound
497 if(!(dwChannelOn&(1<<ch))) continue; // channel not playing? next
ef79bbde
P		 498
499 if(s_chan[ch].iActFreq!=s_chan[ch].iUsedFreq) // new psx frequency?
500 VoiceChangeFrequency(ch);
501
8680e822 502 for(ns=ns_from;ns<ns_to;ns++) // loop until 1 ms of data is reached
ef79bbde 503 {
6d866bb7 504 int sval;
505
ef79bbde
P		 506 if(s_chan[ch].bFMod==1 && iFMod[ns]) // fmod freq channel
507 FModChangeFrequency(ch,ns);
508
509 while(s_chan[ch].spos>=0x10000L)
510 {
511 if(s_chan[ch].iSBPos==28) // 28 reached?
512 {
513 start=s_chan[ch].pCurr; // set up the current pos
514
515 if (start == (unsigned char*)-1) // special "stop" sign
516 {
6d866bb7 517 dwChannelOn&=~(1<<ch); // -> turn everything off
ef79bbde
P		 518 s_chan[ch].ADSRX.EnvelopeVol=0;
519 goto ENDX; // -> and done for this channel
520 }
521
522 s_chan[ch].iSBPos=0;
523
524 //////////////////////////////////////////// spu irq handler here? mmm... do it later
525
526 s_1=s_chan[ch].s_1;
527 s_2=s_chan[ch].s_2;
528
529 predict_nr=(int)*start;start++;
530 shift_factor=predict_nr&0xf;
531 predict_nr >>= 4;
532 flags=(int)*start;start++;
533
534 // -------------------------------------- //
535
536 for (nSample=0;nSample<28;start++)
537 {
538 d=(int)*start;
539 s=((d&0xf)<<12);
540 if(s&0x8000) s|=0xffff0000;
541
542 fa=(s >> shift_factor);
543 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
544 s_2=s_1;s_1=fa;
545 s=((d & 0xf0) << 8);
546
547 s_chan[ch].SB[nSample++]=fa;
548
549 if(s&0x8000) s|=0xffff0000;
550 fa=(s>>shift_factor);
551 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
552 s_2=s_1;s_1=fa;
553
554 s_chan[ch].SB[nSample++]=fa;
555 }
556
557 //////////////////////////////////////////// irq check
558
559 if(irqCallback && (spuCtrl&0x40)) // some callback and irq active?
560 {
561 if((pSpuIrq > start-16 && // irq address reached?
562 pSpuIrq <= start) ||
563 ((flags&1) && // special: irq on looping addr, when stop/loop flag is set
564 (pSpuIrq > s_chan[ch].pLoop-16 &&
565 pSpuIrq <= s_chan[ch].pLoop)))
566 {
ef79bbde
P		 567 irqCallback(); // -> call main emu
568
569 if(iSPUIRQWait) // -> option: wait after irq for main emu
570 {
571 iSpuAsyncWait=1;
572 bIRQReturn=1;
8680e822 573 lastch=ch;
574 lastns=ns;
575 ns_to=ns+1;
ef79bbde
P		 576 }
577 }
578 }
579
580 //////////////////////////////////////////// flag handler
581
582 if((flags&4) && (!s_chan[ch].bIgnoreLoop))
583 s_chan[ch].pLoop=start-16; // loop adress
584
585 if(flags&1) // 1: stop/loop
586 {
587 // We play this block out first...
588 //if(!(flags&2)) // 1+2: do loop... otherwise: stop
589 if(flags!=3 || s_chan[ch].pLoop==NULL) // PETE: if we don't check exactly for 3, loop hang ups will happen (DQ4, for example)
590 { // and checking if pLoop is set avoids crashes, yeah
591 start = (unsigned char*)-1;
592 }
593 else
594 {
595 start = s_chan[ch].pLoop;
596 }
597 }
598
599 s_chan[ch].pCurr=start; // store values for next cycle
600 s_chan[ch].s_1=s_1;
601 s_chan[ch].s_2=s_2;
ef79bbde
P		 602 }
603
604 fa=s_chan[ch].SB[s_chan[ch].iSBPos++]; // get sample data
605
606 StoreInterpolationVal(ch,fa); // store val for later interpolation
607
608 s_chan[ch].spos -= 0x10000L;
609 }
610
611 if(s_chan[ch].bNoise)
612 fa=iGetNoiseVal(ch); // get noise val
613 else fa=iGetInterpolationVal(ch); // get sample val
614
6d866bb7 615 sval = (MixADSR(ch) * fa) / 1023; // mix adsr
ef79bbde
P		 616
617 if(s_chan[ch].bFMod==2) // fmod freq channel
6d866bb7 618 iFMod[ns]=sval; // -> store 1T sample data, use that to do fmod on next channel
ef79bbde
P		 619 else // no fmod freq channel
620 {
621 //////////////////////////////////////////////
622 // ok, left/right sound volume (psx volume goes from 0 ... 0x3fff)
623
97ea4077 624 SSumLR[ns*2] +=(sval*s_chan[ch].iLeftVolume)/0x4000L;
625 SSumLR[ns*2+1]+=(sval*s_chan[ch].iRightVolume)/0x4000L;
ef79bbde
P		 626
627 //////////////////////////////////////////////
628 // now let us store sound data for reverb
629
6d866bb7 630 if(s_chan[ch].bRVBActive) StoreREVERB(ch,ns,sval);
ef79bbde
P		 631 }
632
633 ////////////////////////////////////////////////
634 // ok, go on until 1 ms data of this channel is collected
635
ef79bbde 636 s_chan[ch].spos += s_chan[ch].sinc;
ef79bbde
P		 637 }
638ENDX: ;
639 }
640 }
641
8680e822 642 if(bIRQReturn) // special return for "spu irq - wait for cpu action"
643 {
644 bIRQReturn=0;
645 if(iUseTimer!=2)
646 {
647 DWORD dwWatchTime=timeGetTime_spu()+2500;
648
649 while(iSpuAsyncWait && !bEndThread &&
650 timeGetTime_spu()<dwWatchTime)
651 usleep(1000L);
652 continue;
653 }
654 else
655 {
656 return 0;
657 }
658 }
659
660
ef79bbde
P		 661 //---------------------------------------------------//
662 //- here we have another 1 ms of sound data
663 //---------------------------------------------------//
664 // mix XA infos (if any)
665
666 MixXA();
667
668 ///////////////////////////////////////////////////////
669 // mix all channels (including reverb) into one buffer
670
97ea4077 671 for (ns = 0; ns < NSSIZE*2; )
ef79bbde 672 {
97ea4077 673 SSumLR[ns] += MixREVERBLeft(ns/2);
ef79bbde 674
97ea4077 675 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
ef79bbde
P		 676 if (d < -32767) d = -32767; if (d > 32767) d = 32767;
677 *pS++ = d;
97ea4077 678 ns++;
ef79bbde 679
97ea4077 680 SSumLR[ns] += MixREVERBRight();
ef79bbde 681
97ea4077 682 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
ef79bbde
P		 683 if(d < -32767) d = -32767; if(d > 32767) d = 32767;
684 *pS++ = d;
97ea4077 685 ns++;
ef79bbde
P		 686 }
687
688 //////////////////////////////////////////////////////
689 // special irq handling in the decode buffers (0x0000-0x1000)
690 // we know:
691 // the decode buffers are located in spu memory in the following way:
692 // 0x0000-0x03ff CD audio left
693 // 0x0400-0x07ff CD audio right
694 // 0x0800-0x0bff Voice 1
695 // 0x0c00-0x0fff Voice 3
696 // and decoded data is 16 bit for one sample
697 // we assume:
698 // even if voices 1/3 are off or no cd audio is playing, the internal
699 // play positions will move on and wrap after 0x400 bytes.
700 // Therefore: we just need a pointer from spumem+0 to spumem+3ff, and
701 // increase this pointer on each sample by 2 bytes. If this pointer
702 // (or 0x400 offsets of this pointer) hits the spuirq address, we generate
703 // an IRQ. Only problem: the "wait for cpu" option is kinda hard to do here
704 // in some of Peops timer modes. So: we ignore this option here (for now).
705
706 if(pMixIrq && irqCallback)
707 {
708 for(ns=0;ns<NSSIZE;ns++)
709 {
710 if((spuCtrl&0x40) && pSpuIrq && pSpuIrq<spuMemC+0x1000)
711 {
712 for(ch=0;ch<4;ch++)
713 {
714 if(pSpuIrq>=pMixIrq+(ch*0x400) && pSpuIrq<pMixIrq+(ch*0x400)+2)
6d866bb7 715 irqCallback();
ef79bbde
P		 716 }
717 }
718 pMixIrq+=2;if(pMixIrq>spuMemC+0x3ff) pMixIrq=spuMemC;
719 }
720 }
721
722 InitREVERB();
723
724 // feed the sound
725 // wanna have around 1/60 sec (16.666 ms) updates
726 if (iCycle++ > 16)
727 {
728 SoundFeedStreamData((unsigned char *)pSpuBuffer,
729 ((unsigned char *)pS) - ((unsigned char *)pSpuBuffer));
730 pS = (short *)pSpuBuffer;
731 iCycle = 0;
732 }
733 }
734
735 // end of big main loop...
736
737 bThreadEnded = 1;
738
739 return 0;
740}
741
742// SPU ASYNC... even newer epsxe func
743// 1 time every 'cycle' cycles... harhar
744
745void CALLBACK SPUasync(unsigned long cycle)
746{
747 if(iSpuAsyncWait)
748 {
749 iSpuAsyncWait++;
17ed0d69 750 if(iSpuAsyncWait<=16) return;
ef79bbde
P		 751 iSpuAsyncWait=0;
752 }
753
754 if(iUseTimer==2) // special mode, only used in Linux by this spu (or if you enable the experimental Windows mode)
755 {
756 if(!bSpuInit) return; // -> no init, no call
757
758 MAINThread(0); // -> linux high-compat mode
17ed0d69 759
760 // abuse iSpuAsyncWait mechanism to reduce calls to above function
761 // to make it do larger chunks
762 // note: doing it less often than once per frame causes skips
763 iSpuAsyncWait=1;
ef79bbde
P		 764 }
765}
766
767// SPU UPDATE... new epsxe func
768// 1 time every 32 hsync lines
769// (312/32)x50 in pal
770// (262/32)x60 in ntsc
771
772// since epsxe 1.5.2 (linux) uses SPUupdate, not SPUasync, I will
773// leave that func in the linux port, until epsxe linux is using
774// the async function as well
775
776void CALLBACK SPUupdate(void)
777{
778 SPUasync(0);
779}
780
781// XA AUDIO
782
783void CALLBACK SPUplayADPCMchannel(xa_decode_t *xap)
784{
785 if(!xap) return;
786 if(!xap->freq) return; // no xa freq ? bye
787
788 FeedXA(xap); // call main XA feeder
789}
790
791// CDDA AUDIO
792void CALLBACK SPUplayCDDAchannel(short *pcm, int nbytes)
793{
794 if (!pcm) return;
795 if (nbytes<=0) return;
796
797 FeedCDDA((unsigned char *)pcm, nbytes);
798}
799
800// SETUPTIMER: init of certain buffers and threads/timers
801void SetupTimer(void)
802{
97ea4077 803 memset(SSumLR,0,sizeof(SSumLR)); // init some mixing buffers
ef79bbde
P		 804 memset(iFMod,0,NSSIZE*sizeof(int));
805 pS=(short *)pSpuBuffer; // setup soundbuffer pointer
806
807 bEndThread=0; // init thread vars
808 bThreadEnded=0;
809 bSpuInit=1; // flag: we are inited
810
811 if(!iUseTimer) // linux: use thread
812 {
813 pthread_create(&thread, NULL, MAINThread, NULL);
814 }
815}
816
817// REMOVETIMER: kill threads/timers
818void RemoveTimer(void)
819{
820 bEndThread=1; // raise flag to end thread
821
822 if(!iUseTimer) // linux tread?
823 {
824 int i=0;
825 while(!bThreadEnded && i<2000) {usleep(1000L);i++;} // -> wait until thread has ended
826 if(thread!=(pthread_t)-1) {pthread_cancel(thread);thread=(pthread_t)-1;} // -> cancel thread anyway
827 }
828
829 bThreadEnded=0; // no more spu is running
830 bSpuInit=0;
831}
832
833// SETUPSTREAMS: init most of the spu buffers
834void SetupStreams(void)
835{
836 int i;
837
838 pSpuBuffer=(unsigned char *)malloc(32768); // alloc mixing buffer
839
840 if(iUseReverb==1) i=88200*2;
841 else i=NSSIZE*2;
842
843 sRVBStart = (int *)malloc(i*4); // alloc reverb buffer
844 memset(sRVBStart,0,i*4);
845 sRVBEnd = sRVBStart + i;
846 sRVBPlay = sRVBStart;
847
848 XAStart = // alloc xa buffer
849 (uint32_t *)malloc(44100 * sizeof(uint32_t));
850 XAEnd = XAStart + 44100;
851 XAPlay = XAStart;
852 XAFeed = XAStart;
853
854 CDDAStart = // alloc cdda buffer
855 (uint32_t *)malloc(16384 * sizeof(uint32_t));
856 CDDAEnd = CDDAStart + 16384;
857 CDDAPlay = CDDAStart;
858 CDDAFeed = CDDAStart + 1;
859
860 for(i=0;i<MAXCHAN;i++) // loop sound channels
861 {
862// we don't use mutex sync... not needed, would only
863// slow us down:
864// s_chan[i].hMutex=CreateMutex(NULL,FALSE,NULL);
6d866bb7 865 s_chan[i].ADSRX.SustainLevel = 0xf; // -> init sustain
ef79bbde
P		 866 s_chan[i].pLoop=spuMemC;
867 s_chan[i].pStart=spuMemC;
868 s_chan[i].pCurr=spuMemC;
869 }
870
871 pMixIrq=spuMemC; // enable decoded buffer irqs by setting the address
872}
873
874// REMOVESTREAMS: free most buffer
875void RemoveStreams(void)
876{
877 free(pSpuBuffer); // free mixing buffer
878 pSpuBuffer = NULL;
879 free(sRVBStart); // free reverb buffer
880 sRVBStart = NULL;
881 free(XAStart); // free XA buffer
882 XAStart = NULL;
883 free(CDDAStart); // free CDDA buffer
884 CDDAStart = NULL;
885}
886
887// INIT/EXIT STUFF
888
889// SPUINIT: this func will be called first by the main emu
890long CALLBACK SPUinit(void)
891{
892 spuMemC = (unsigned char *)spuMem; // just small setup
893 memset((void *)&rvb, 0, sizeof(REVERBInfo));
894 InitADSR();
895
896 iVolume = 3;
897 iReverbOff = -1;
898 spuIrq = 0;
899 spuAddr = 0xffffffff;
900 bEndThread = 0;
901 bThreadEnded = 0;
902 spuMemC = (unsigned char *)spuMem;
903 pMixIrq = 0;
904 memset((void *)s_chan, 0, (MAXCHAN + 1) * sizeof(SPUCHAN));
905 pSpuIrq = 0;
cdb31c95 906 //iSPUIRQWait = 0;
ef79bbde
P		 907 lastch = -1;
908
d7296e10 909 //ReadConfigSPU(); // read user stuff
ef79bbde
P		 910 SetupStreams(); // prepare streaming
911
912 return 0;
913}
914
915// SPUOPEN: called by main emu after init
916long CALLBACK SPUopen(void)
917{
918 if (bSPUIsOpen) return 0; // security for some stupid main emus
919
920 SetupSound(); // setup sound (before init!)
921 SetupTimer(); // timer for feeding data
922
923 bSPUIsOpen = 1;
924
925 return PSE_SPU_ERR_SUCCESS;
926}
927
928// SPUCLOSE: called before shutdown
929long CALLBACK SPUclose(void)
930{
931 if (!bSPUIsOpen) return 0; // some security
932
933 bSPUIsOpen = 0; // no more open
934
935 RemoveTimer(); // no more feeding
936 RemoveSound(); // no more sound handling
937
938 return 0;
939}
940
941// SPUSHUTDOWN: called by main emu on final exit
942long CALLBACK SPUshutdown(void)
943{
944 SPUclose();
945 RemoveStreams(); // no more streaming
946
947 return 0;
948}
949
950// SPUTEST: we don't test, we are always fine ;)
951long CALLBACK SPUtest(void)
952{
953 return 0;
954}
955
956// SPUCONFIGURE: call config dialog
957long CALLBACK SPUconfigure(void)
958{
959#ifdef _MACOSX
960 DoConfiguration();
961#else
ee849648 962// StartCfgTool("CFG");
ef79bbde
P		 963#endif
964 return 0;
965}
966
967// SPUABOUT: show about window
968void CALLBACK SPUabout(void)
969{
970#ifdef _MACOSX
971 DoAbout();
972#else
ee849648 973// StartCfgTool("ABOUT");
ef79bbde
P		 974#endif
975}
976
977// SETUP CALLBACKS
978// this functions will be called once,
979// passes a callback that should be called on SPU-IRQ/cdda volume change
980void CALLBACK SPUregisterCallback(void (CALLBACK *callback)(void))
981{
982 irqCallback = callback;
983}
984
985void CALLBACK SPUregisterCDDAVolume(void (CALLBACK *CDDAVcallback)(unsigned short,unsigned short))
986{
987 cddavCallback = CDDAVcallback;
988}
989
990// COMMON PLUGIN INFO FUNCS
e906c010 991/*
ef79bbde
P		 992char * CALLBACK PSEgetLibName(void)
993{
994 return _(libraryName);
995}
996
997unsigned long CALLBACK PSEgetLibType(void)
998{
999 return PSE_LT_SPU;
1000}
1001
1002unsigned long CALLBACK PSEgetLibVersion(void)
1003{
1004 return (1 << 16) | (6 << 8);
1005}
1006
1007char * SPUgetLibInfos(void)
1008{
1009 return _(libraryInfo);
1010}
e906c010 1011*/
6d866bb7 1012
1013// vim:shiftwidth=1:expandtab
ARM optimized PCSX fork