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spu: some refactoring for upcoming optimization attempt
[pcsx_rearmed.git] / plugins / dfsound / spu.c
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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
37/*
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");
53*/
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;
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
97unsigned long dwChannelOn=0;
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
104static const int f[8][2] = { { 0, 0 },
105 { 60, 0 },
106 { 115, -52 },
107 { 98, -55 },
108 { 122, -60 } };
109int SSumLR[NSSIZE*2];
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
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;
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
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
426static int decode_block(int ch)
427{
428 unsigned char *start;
429 unsigned int nSample;
430 int predict_nr,shift_factor,flags,d,s;
431 int fa,s_1,s_2;
432 int ret = 0;
433
434 s_chan[ch].iSBPos=0;
435
436 start=s_chan[ch].pCurr; // set up the current pos
437 if (start == (unsigned char*)-1) // special "stop" sign
438 {
439 dwChannelOn&=~(1<<ch); // -> turn everything off
440 s_chan[ch].bStop=1;
441 s_chan[ch].ADSRX.EnvelopeVol=0;
442 return 0; // -> and done for this channel
443 }
444
445 //////////////////////////////////////////// spu irq handler here? mmm... do it later
446
447 s_1=s_chan[ch].s_1;
448 s_2=s_chan[ch].s_2;
449
450 predict_nr=(int)*start;start++;
451 shift_factor=predict_nr&0xf;
452 predict_nr >>= 4;
453 flags=(int)*start;start++;
454
455 // -------------------------------------- //
456
457 for (nSample=0;nSample<28;start++)
458 {
459 d=(int)*start;
460 s=((d&0xf)<<12);
461 if(s&0x8000) s|=0xffff0000;
462
463 fa=(s >> shift_factor);
464 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
465 s_2=s_1;s_1=fa;
466 s=((d & 0xf0) << 8);
467
468 s_chan[ch].SB[nSample++]=fa;
469
470 if(s&0x8000) s|=0xffff0000;
471 fa=(s>>shift_factor);
472 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
473 s_2=s_1;s_1=fa;
474
475 s_chan[ch].SB[nSample++]=fa;
476 }
477
478 //////////////////////////////////////////// irq check
479
480 if(irqCallback && (spuCtrl&0x40)) // some callback and irq active?
481 {
482 if((pSpuIrq > start-16 && // irq address reached?
483 pSpuIrq <= start) ||
484 ((flags&1) && // special: irq on looping addr, when stop/loop flag is set
485 (pSpuIrq > s_chan[ch].pLoop-16 &&
486 pSpuIrq <= s_chan[ch].pLoop)))
487 {
488 irqCallback(); // -> call main emu
489 ret = 1;
490 }
491 }
492
493 //////////////////////////////////////////// flag handler
494
495 if((flags&4) && (!s_chan[ch].bIgnoreLoop))
496 s_chan[ch].pLoop=start-16; // loop adress
497
498 if(flags&1) // 1: stop/loop
499 {
500 // We play this block out first...
501 //if(!(flags&2)) // 1+2: do loop... otherwise: stop
502 if(flags!=3 && flags!=7) // PETE: if we don't check exactly for 3, loop hang ups will happen (DQ4, for example)
503 {
504 start = (unsigned char*)-1;
505 }
506 else
507 {
508 start = s_chan[ch].pLoop;
509 }
510 }
511
512 if (start - spuMemC >= 0x80000)
513 start = (unsigned char*)-1;
514
515 s_chan[ch].pCurr=start; // store values for next cycle
516 s_chan[ch].s_1=s_1;
517 s_chan[ch].s_2=s_2;
518
519 return ret;
520}
521
522////////////////////////////////////////////////////////////////////////
523// MAIN SPU FUNCTION
524// here is the main job handler... thread, timer or direct func call
525// basically the whole sound processing is done in this fat func!
526////////////////////////////////////////////////////////////////////////
527
528// 5 ms waiting phase, if buffer is full and no new sound has to get started
529// .. can be made smaller (smallest val: 1 ms), but bigger waits give
530// better performance
531
532#define PAUSE_W 5
533#define PAUSE_L 5000
534
535////////////////////////////////////////////////////////////////////////
536
537static void *MAINThread(void *arg)
538{
539 int fa,ns,ns_from,ns_to;
540#if !defined(_MACOSX) && !defined(__arm__)
541 int voldiv = iVolume;
542#else
543 const int voldiv = 2;
544#endif
545 int ch,d;
546 int bIRQReturn=0;
547
548 while(!bEndThread) // until we are shutting down
549 {
550 // ok, at the beginning we are looking if there is
551 // enuff free place in the dsound/oss buffer to
552 // fill in new data, or if there is a new channel to start.
553 // if not, we wait (thread) or return (timer/spuasync)
554 // until enuff free place is available/a new channel gets
555 // started
556
557 if(dwNewChannel) // new channel should start immedately?
558 { // (at least one bit 0 ... MAXCHANNEL is set?)
559 iSecureStart++; // -> set iSecure
560 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)
561 }
562 else iSecureStart=0; // 0: no new channel should start
563
564 while(!iSecureStart && !bEndThread && // no new start? no thread end?
565 (SoundGetBytesBuffered()>TESTSIZE)) // and still enuff data in sound buffer?
566 {
567 iSecureStart=0; // reset secure
568
569 if(iUseTimer) return 0; // linux no-thread mode? bye
570 usleep(PAUSE_L); // else sleep for x ms (linux)
571
572 if(dwNewChannel) iSecureStart=1; // if a new channel kicks in (or, of course, sound buffer runs low), we will leave the loop
573 }
574
575 //--------------------------------------------------// continue from irq handling in timer mode?
576
577 ns_from=0;
578 ns_to=NSSIZE;
579 ch=0;
580 if(lastch>=0) // will be -1 if no continue is pending
581 {
582 ch=lastch; ns_from=lastns; lastch=-1; // -> setup all kind of vars to continue
583 }
584
585 //--------------------------------------------------//
586 //- main channel loop -//
587 //--------------------------------------------------//
588 {
589 for(;ch<MAXCHAN;ch++) // loop em all... we will collect 1 ms of sound of each playing channel
590 {
591 if(dwNewChannel&(1<<ch)) StartSound(ch); // start new sound
592 if(!(dwChannelOn&(1<<ch))) continue; // channel not playing? next
593
594 if(s_chan[ch].iActFreq!=s_chan[ch].iUsedFreq) // new psx frequency?
595 VoiceChangeFrequency(ch);
596
597 for(ns=ns_from;ns<ns_to;ns++) // loop until 1 ms of data is reached
598 {
599 int sval;
600
601 if(!(dwChannelOn&(1<<ch))) break; // something turned ch off (adsr or flags)
602
603 if(s_chan[ch].bFMod==1 && iFMod[ns]) // fmod freq channel
604 FModChangeFrequency(ch,ns);
605
606 while(s_chan[ch].spos>=0x10000L)
607 {
608 if(s_chan[ch].iSBPos==28) // 28 reached?
609 {
610 d = decode_block(ch);
611 if(d && iSPUIRQWait) // -> option: wait after irq for main emu
612 {
613 bIRQReturn=1;
614 lastch=ch;
615 lastns=ns_to=ns;
616 goto ENDX; // do remaining chans unil this ns
617 }
618 }
619
620 fa=s_chan[ch].SB[s_chan[ch].iSBPos++]; // get sample data
621
622 StoreInterpolationVal(ch,fa); // store val for later interpolation
623
624 s_chan[ch].spos -= 0x10000L;
625 }
626
627 if(s_chan[ch].bNoise)
628 fa=iGetNoiseVal(ch); // get noise val
629 else fa=iGetInterpolationVal(ch); // get sample val
630
631 sval = (MixADSR(ch) * fa) / 1024; // mix adsr
632
633 if(s_chan[ch].bFMod==2) // fmod freq channel
634 iFMod[ns]=sval; // -> store 1T sample data, use that to do fmod on next channel
635 else // no fmod freq channel
636 {
637 //////////////////////////////////////////////
638 // ok, left/right sound volume (psx volume goes from 0 ... 0x3fff)
639
640 SSumLR[ns*2] +=(sval*s_chan[ch].iLeftVolume)/0x4000L;
641 SSumLR[ns*2+1]+=(sval*s_chan[ch].iRightVolume)/0x4000L;
642
643 //////////////////////////////////////////////
644 // now let us store sound data for reverb
645
646 if(s_chan[ch].bRVBActive) StoreREVERB(ch,ns,sval);
647 }
648
649 ////////////////////////////////////////////////
650 // ok, go on until 1 ms data of this channel is collected
651
652 s_chan[ch].spos += s_chan[ch].sinc;
653 }
654ENDX: ;
655 }
656 }
657
658 if(bIRQReturn && iSPUIRQWait) // special return for "spu irq - wait for cpu action"
659 {
660 iSpuAsyncWait=1;
661 bIRQReturn=0;
662 if(iUseTimer!=2)
663 {
664 DWORD dwWatchTime=timeGetTime_spu()+2500;
665
666 while(iSpuAsyncWait && !bEndThread &&
667 timeGetTime_spu()<dwWatchTime)
668 usleep(1000L);
669 continue;
670 }
671 else
672 {
673 return 0;
674 }
675 }
676
677
678 //---------------------------------------------------//
679 //- here we have another 1 ms of sound data
680 //---------------------------------------------------//
681 // mix XA infos (if any)
682
683 MixXA();
684
685 ///////////////////////////////////////////////////////
686 // mix all channels (including reverb) into one buffer
687
688 for (ns = 0; ns < NSSIZE*2; )
689 {
690 SSumLR[ns] += MixREVERBLeft(ns/2);
691
692 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
693 if (d < -32767) d = -32767; if (d > 32767) d = 32767;
694 *pS++ = d;
695 ns++;
696
697 SSumLR[ns] += MixREVERBRight();
698
699 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
700 if(d < -32767) d = -32767; if(d > 32767) d = 32767;
701 *pS++ = d;
702 ns++;
703 }
704
705 //////////////////////////////////////////////////////
706 // special irq handling in the decode buffers (0x0000-0x1000)
707 // we know:
708 // the decode buffers are located in spu memory in the following way:
709 // 0x0000-0x03ff CD audio left
710 // 0x0400-0x07ff CD audio right
711 // 0x0800-0x0bff Voice 1
712 // 0x0c00-0x0fff Voice 3
713 // and decoded data is 16 bit for one sample
714 // we assume:
715 // even if voices 1/3 are off or no cd audio is playing, the internal
716 // play positions will move on and wrap after 0x400 bytes.
717 // Therefore: we just need a pointer from spumem+0 to spumem+3ff, and
718 // increase this pointer on each sample by 2 bytes. If this pointer
719 // (or 0x400 offsets of this pointer) hits the spuirq address, we generate
720 // an IRQ. Only problem: the "wait for cpu" option is kinda hard to do here
721 // in some of Peops timer modes. So: we ignore this option here (for now).
722
723 if(pMixIrq && irqCallback)
724 {
725 for(ns=0;ns<NSSIZE;ns++)
726 {
727 if((spuCtrl&0x40) && pSpuIrq && pSpuIrq<spuMemC+0x1000)
728 {
729 for(ch=0;ch<4;ch++)
730 {
731 if(pSpuIrq>=pMixIrq+(ch*0x400) && pSpuIrq<pMixIrq+(ch*0x400)+2)
732 irqCallback();
733 }
734 }
735 pMixIrq+=2;if(pMixIrq>spuMemC+0x3ff) pMixIrq=spuMemC;
736 }
737 }
738
739 InitREVERB();
740
741 // feed the sound
742 // wanna have around 1/60 sec (16.666 ms) updates
743 if (iCycle++ > 16)
744 {
745 SoundFeedStreamData((unsigned char *)pSpuBuffer,
746 ((unsigned char *)pS) - ((unsigned char *)pSpuBuffer));
747 pS = (short *)pSpuBuffer;
748 iCycle = 0;
749 }
750 }
751
752 // end of big main loop...
753
754 bThreadEnded = 1;
755
756 return 0;
757}
758
759// SPU ASYNC... even newer epsxe func
760// 1 time every 'cycle' cycles... harhar
761
762void CALLBACK SPUasync(unsigned long cycle)
763{
764 if(iSpuAsyncWait)
765 {
766 iSpuAsyncWait++;
767 if(iSpuAsyncWait<=16) return;
768 iSpuAsyncWait=0;
769 }
770
771 if(iUseTimer==2) // special mode, only used in Linux by this spu (or if you enable the experimental Windows mode)
772 {
773 if(!bSpuInit) return; // -> no init, no call
774
775 MAINThread(0); // -> linux high-compat mode
776
777 // abuse iSpuAsyncWait mechanism to reduce calls to above function
778 // to make it do larger chunks
779 // note: doing it less often than once per frame causes skips
780 iSpuAsyncWait=1;
781 }
782}
783
784// SPU UPDATE... new epsxe func
785// 1 time every 32 hsync lines
786// (312/32)x50 in pal
787// (262/32)x60 in ntsc
788
789// since epsxe 1.5.2 (linux) uses SPUupdate, not SPUasync, I will
790// leave that func in the linux port, until epsxe linux is using
791// the async function as well
792
793void CALLBACK SPUupdate(void)
794{
795 SPUasync(0);
796}
797
798// XA AUDIO
799
800void CALLBACK SPUplayADPCMchannel(xa_decode_t *xap)
801{
802 if(!xap) return;
803 if(!xap->freq) return; // no xa freq ? bye
804
805 FeedXA(xap); // call main XA feeder
806}
807
808// CDDA AUDIO
809void CALLBACK SPUplayCDDAchannel(short *pcm, int nbytes)
810{
811 if (!pcm) return;
812 if (nbytes<=0) return;
813
814 FeedCDDA((unsigned char *)pcm, nbytes);
815}
816
817// SETUPTIMER: init of certain buffers and threads/timers
818void SetupTimer(void)
819{
820 memset(SSumLR,0,sizeof(SSumLR)); // init some mixing buffers
821 memset(iFMod,0,NSSIZE*sizeof(int));
822 pS=(short *)pSpuBuffer; // setup soundbuffer pointer
823
824 bEndThread=0; // init thread vars
825 bThreadEnded=0;
826 bSpuInit=1; // flag: we are inited
827
828 if(!iUseTimer) // linux: use thread
829 {
830 pthread_create(&thread, NULL, MAINThread, NULL);
831 }
832}
833
834// REMOVETIMER: kill threads/timers
835void RemoveTimer(void)
836{
837 bEndThread=1; // raise flag to end thread
838
839 if(!iUseTimer) // linux tread?
840 {
841 int i=0;
842 while(!bThreadEnded && i<2000) {usleep(1000L);i++;} // -> wait until thread has ended
843 if(thread!=(pthread_t)-1) {pthread_cancel(thread);thread=(pthread_t)-1;} // -> cancel thread anyway
844 }
845
846 bThreadEnded=0; // no more spu is running
847 bSpuInit=0;
848}
849
850// SETUPSTREAMS: init most of the spu buffers
851void SetupStreams(void)
852{
853 int i;
854
855 pSpuBuffer=(unsigned char *)malloc(32768); // alloc mixing buffer
856
857 if(iUseReverb==1) i=88200*2;
858 else i=NSSIZE*2;
859
860 sRVBStart = (int *)malloc(i*4); // alloc reverb buffer
861 memset(sRVBStart,0,i*4);
862 sRVBEnd = sRVBStart + i;
863 sRVBPlay = sRVBStart;
864
865 XAStart = // alloc xa buffer
866 (uint32_t *)malloc(44100 * sizeof(uint32_t));
867 XAEnd = XAStart + 44100;
868 XAPlay = XAStart;
869 XAFeed = XAStart;
870
871 CDDAStart = // alloc cdda buffer
872 (uint32_t *)malloc(16384 * sizeof(uint32_t));
873 CDDAEnd = CDDAStart + 16384;
874 CDDAPlay = CDDAStart;
875 CDDAFeed = CDDAStart;
876
877 for(i=0;i<MAXCHAN;i++) // loop sound channels
878 {
879// we don't use mutex sync... not needed, would only
880// slow us down:
881// s_chan[i].hMutex=CreateMutex(NULL,FALSE,NULL);
882 s_chan[i].ADSRX.SustainLevel = 0xf; // -> init sustain
883 s_chan[i].pLoop=spuMemC;
884 s_chan[i].pStart=spuMemC;
885 s_chan[i].pCurr=spuMemC;
886 }
887
888 pMixIrq=spuMemC; // enable decoded buffer irqs by setting the address
889}
890
891// REMOVESTREAMS: free most buffer
892void RemoveStreams(void)
893{
894 free(pSpuBuffer); // free mixing buffer
895 pSpuBuffer = NULL;
896 free(sRVBStart); // free reverb buffer
897 sRVBStart = NULL;
898 free(XAStart); // free XA buffer
899 XAStart = NULL;
900 free(CDDAStart); // free CDDA buffer
901 CDDAStart = NULL;
902}
903
904// INIT/EXIT STUFF
905
906// SPUINIT: this func will be called first by the main emu
907long CALLBACK SPUinit(void)
908{
909 spuMemC = (unsigned char *)spuMem; // just small setup
910 memset((void *)&rvb, 0, sizeof(REVERBInfo));
911 InitADSR();
912
913 iVolume = 3;
914 iReverbOff = -1;
915 spuIrq = 0;
916 spuAddr = 0xffffffff;
917 bEndThread = 0;
918 bThreadEnded = 0;
919 spuMemC = (unsigned char *)spuMem;
920 pMixIrq = 0;
921 memset((void *)s_chan, 0, (MAXCHAN + 1) * sizeof(SPUCHAN));
922 pSpuIrq = 0;
923 //iSPUIRQWait = 0;
924 lastch = -1;
925
926 //ReadConfigSPU(); // read user stuff
927 SetupStreams(); // prepare streaming
928
929 return 0;
930}
931
932// SPUOPEN: called by main emu after init
933long CALLBACK SPUopen(void)
934{
935 if (bSPUIsOpen) return 0; // security for some stupid main emus
936
937 SetupSound(); // setup sound (before init!)
938 SetupTimer(); // timer for feeding data
939
940 bSPUIsOpen = 1;
941
942 return PSE_SPU_ERR_SUCCESS;
943}
944
945// SPUCLOSE: called before shutdown
946long CALLBACK SPUclose(void)
947{
948 if (!bSPUIsOpen) return 0; // some security
949
950 bSPUIsOpen = 0; // no more open
951
952 RemoveTimer(); // no more feeding
953 RemoveSound(); // no more sound handling
954
955 return 0;
956}
957
958// SPUSHUTDOWN: called by main emu on final exit
959long CALLBACK SPUshutdown(void)
960{
961 SPUclose();
962 RemoveStreams(); // no more streaming
963
964 return 0;
965}
966
967// SPUTEST: we don't test, we are always fine ;)
968long CALLBACK SPUtest(void)
969{
970 return 0;
971}
972
973// SPUCONFIGURE: call config dialog
974long CALLBACK SPUconfigure(void)
975{
976#ifdef _MACOSX
977 DoConfiguration();
978#else
979// StartCfgTool("CFG");
980#endif
981 return 0;
982}
983
984// SPUABOUT: show about window
985void CALLBACK SPUabout(void)
986{
987#ifdef _MACOSX
988 DoAbout();
989#else
990// StartCfgTool("ABOUT");
991#endif
992}
993
994// SETUP CALLBACKS
995// this functions will be called once,
996// passes a callback that should be called on SPU-IRQ/cdda volume change
997void CALLBACK SPUregisterCallback(void (CALLBACK *callback)(void))
998{
999 irqCallback = callback;
1000}
1001
1002void CALLBACK SPUregisterCDDAVolume(void (CALLBACK *CDDAVcallback)(unsigned short,unsigned short))
1003{
1004 cddavCallback = CDDAVcallback;
1005}
1006
1007// COMMON PLUGIN INFO FUNCS
1008/*
1009char * CALLBACK PSEgetLibName(void)
1010{
1011 return _(libraryName);
1012}
1013
1014unsigned long CALLBACK PSEgetLibType(void)
1015{
1016 return PSE_LT_SPU;
1017}
1018
1019unsigned long CALLBACK PSEgetLibVersion(void)
1020{
1021 return (1 << 16) | (6 << 8);
1022}
1023
1024char * SPUgetLibInfos(void)
1025{
1026 return _(libraryInfo);
1027}
1028*/
1029
1030// vim:shiftwidth=1:expandtab
ARM optimized PCSX fork