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spu: compact chan structure a bit
[pcsx_rearmed.git] / plugins / dfsound / spu.c
CommitLineData
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;
76int iDisStereo=0;
77
78// MAIN infos struct for each channel
79
80SPUCHAN s_chan[MAXCHAN+1]; // channel + 1 infos (1 is security for fmod handling)
81REVERBInfo rvb;
82
83unsigned long dwNoiseVal=1; // global noise generator
84int iSpuAsyncWait=0;
85
86unsigned short spuCtrl=0; // some vars to store psx reg infos
87unsigned short spuStat=0;
88unsigned short spuIrq=0;
89unsigned long spuAddr=0xffffffff; // address into spu mem
90int bEndThread=0; // thread handlers
91int bThreadEnded=0;
92int bSpuInit=0;
93int bSPUIsOpen=0;
94
95static pthread_t thread = (pthread_t)-1; // thread id (linux)
96
97unsigned long dwNewChannel=0; // flags for faster testing, if new channel starts
6d866bb7 98unsigned long dwChannelOn=0;
ef79bbde
P		 99
100void (CALLBACK *irqCallback)(void)=0; // func of main emu, called on spu irq
101void (CALLBACK *cddavCallback)(unsigned short,unsigned short)=0;
102
103// certain globals (were local before, but with the new timeproc I need em global)
104
6d866bb7 105static const int f[8][2] = { { 0, 0 },
ef79bbde
P		 106 { 60, 0 },
107 { 115, -52 },
108 { 98, -55 },
109 { 122, -60 } };
110int SSumR[NSSIZE];
111int SSumL[NSSIZE];
112int iFMod[NSSIZE];
113int iCycle = 0;
114short * pS;
115
116int lastch=-1; // last channel processed on spu irq in timer mode
117static int lastns=0; // last ns pos
118static int iSecureStart=0; // secure start counter
119
120////////////////////////////////////////////////////////////////////////
121// CODE AREA
122////////////////////////////////////////////////////////////////////////
123
124// dirty inline func includes
125
126#include "reverb.c"
127#include "adsr.c"
128
129////////////////////////////////////////////////////////////////////////
130// helpers for simple interpolation
131
132//
133// easy interpolation on upsampling, no special filter, just "Pete's common sense" tm
134//
135// instead of having n equal sample values in a row like:
136// ____
137// |____
138//
139// we compare the current delta change with the next delta change.
140//
141// if curr_delta is positive,
142//
143// - and next delta is smaller (or changing direction):
144// \.
145// -__
146//
147// - and next delta significant (at least twice) bigger:
148// --_
149// \.
150//
151// - and next delta is nearly same:
152// \.
153// \.
154//
155//
156// if curr_delta is negative,
157//
158// - and next delta is smaller (or changing direction):
159// _--
160// /
161//
162// - and next delta significant (at least twice) bigger:
163// /
164// __-
165//
166// - and next delta is nearly same:
167// /
168// /
169//
170
171
172INLINE void InterpolateUp(int ch)
173{
174 if(s_chan[ch].SB[32]==1) // flag == 1? calc step and set flag... and don't change the value in this pass
175 {
176 const int id1=s_chan[ch].SB[30]-s_chan[ch].SB[29]; // curr delta to next val
177 const int id2=s_chan[ch].SB[31]-s_chan[ch].SB[30]; // and next delta to next-next val :)
178
179 s_chan[ch].SB[32]=0;
180
181 if(id1>0) // curr delta positive
182 {
183 if(id2<id1)
184 {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
185 else
186 if(id2<(id1<<1))
187 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
188 else
189 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
190 }
191 else // curr delta negative
192 {
193 if(id2>id1)
194 {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
195 else
196 if(id2>(id1<<1))
197 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
198 else
199 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
200 }
201 }
202 else
203 if(s_chan[ch].SB[32]==2) // flag 1: calc step and set flag... and don't change the value in this pass
204 {
205 s_chan[ch].SB[32]=0;
206
207 s_chan[ch].SB[28]=(s_chan[ch].SB[28]*s_chan[ch].sinc)/0x20000L;
208 if(s_chan[ch].sinc<=0x8000)
209 s_chan[ch].SB[29]=s_chan[ch].SB[30]-(s_chan[ch].SB[28]*((0x10000/s_chan[ch].sinc)-1));
210 else s_chan[ch].SB[29]+=s_chan[ch].SB[28];
211 }
212 else // no flags? add bigger val (if possible), calc smaller step, set flag1
213 s_chan[ch].SB[29]+=s_chan[ch].SB[28];
214}
215
216//
217// even easier interpolation on downsampling, also no special filter, again just "Pete's common sense" tm
218//
219
220INLINE void InterpolateDown(int ch)
221{
222 if(s_chan[ch].sinc>=0x20000L) // we would skip at least one val?
223 {
224 s_chan[ch].SB[29]+=(s_chan[ch].SB[30]-s_chan[ch].SB[29])/2; // add easy weight
225 if(s_chan[ch].sinc>=0x30000L) // we would skip even more vals?
226 s_chan[ch].SB[29]+=(s_chan[ch].SB[31]-s_chan[ch].SB[30])/2;// add additional next weight
227 }
228}
229
230////////////////////////////////////////////////////////////////////////
231// helpers for gauss interpolation
232
233#define gval0 (((short*)(&s_chan[ch].SB[29]))[gpos])
234#define gval(x) (((short*)(&s_chan[ch].SB[29]))[(gpos+x)&3])
235
236#include "gauss_i.h"
237
238////////////////////////////////////////////////////////////////////////
239
240#include "xa.c"
241
242////////////////////////////////////////////////////////////////////////
243// START SOUND... called by main thread to setup a new sound on a channel
244////////////////////////////////////////////////////////////////////////
245
246INLINE void StartSound(int ch)
247{
248 StartADSR(ch);
249 StartREVERB(ch);
250
b00afb77 251 // fussy timing issues - do in VoiceOn
252 //s_chan[ch].pCurr=s_chan[ch].pStart; // set sample start
253 //s_chan[ch].bStop=0;
254 //s_chan[ch].bOn=1;
ef79bbde
P		 255
256 s_chan[ch].s_1=0; // init mixing vars
257 s_chan[ch].s_2=0;
258 s_chan[ch].iSBPos=28;
259
ef79bbde
P		 260 s_chan[ch].SB[29]=0; // init our interpolation helpers
261 s_chan[ch].SB[30]=0;
262
263 if(iUseInterpolation>=2) // gauss interpolation?
264 {s_chan[ch].spos=0x30000L;s_chan[ch].SB[28]=0;} // -> start with more decoding
265 else {s_chan[ch].spos=0x10000L;s_chan[ch].SB[31]=0;} // -> no/simple interpolation starts with one 44100 decoding
266
267 dwNewChannel&=~(1<<ch); // clear new channel bit
268}
269
270////////////////////////////////////////////////////////////////////////
271// ALL KIND OF HELPERS
272////////////////////////////////////////////////////////////////////////
273
274INLINE void VoiceChangeFrequency(int ch)
275{
276 s_chan[ch].iUsedFreq=s_chan[ch].iActFreq; // -> take it and calc steps
277 s_chan[ch].sinc=s_chan[ch].iRawPitch<<4;
278 if(!s_chan[ch].sinc) s_chan[ch].sinc=1;
279 if(iUseInterpolation==1) s_chan[ch].SB[32]=1; // -> freq change in simle imterpolation mode: set flag
280}
281
282////////////////////////////////////////////////////////////////////////
283
284INLINE void FModChangeFrequency(int ch,int ns)
285{
286 int NP=s_chan[ch].iRawPitch;
287
288 NP=((32768L+iFMod[ns])*NP)/32768L;
289
290 if(NP>0x3fff) NP=0x3fff;
291 if(NP<0x1) NP=0x1;
292
293 NP=(44100L*NP)/(4096L); // calc frequency
294
295 s_chan[ch].iActFreq=NP;
296 s_chan[ch].iUsedFreq=NP;
297 s_chan[ch].sinc=(((NP/10)<<16)/4410);
298 if(!s_chan[ch].sinc) s_chan[ch].sinc=1;
299 if(iUseInterpolation==1) // freq change in simple interpolation mode
300 s_chan[ch].SB[32]=1;
301 iFMod[ns]=0;
302}
303
304////////////////////////////////////////////////////////////////////////
305
306// noise handler... just produces some noise data
307// surely wrong... and no noise frequency (spuCtrl&0x3f00) will be used...
308// and sometimes the noise will be used as fmod modulation... pfff
309
310INLINE int iGetNoiseVal(int ch)
311{
312 int fa;
313
314 if((dwNoiseVal<<=1)&0x80000000L)
315 {
316 dwNoiseVal^=0x0040001L;
317 fa=((dwNoiseVal>>2)&0x7fff);
318 fa=-fa;
319 }
320 else fa=(dwNoiseVal>>2)&0x7fff;
321
322 // mmm... depending on the noise freq we allow bigger/smaller changes to the previous val
323 fa=s_chan[ch].iOldNoise+((fa-s_chan[ch].iOldNoise)/((0x001f-((spuCtrl&0x3f00)>>9))+1));
324 if(fa>32767L) fa=32767L;
325 if(fa<-32767L) fa=-32767L;
326 s_chan[ch].iOldNoise=fa;
327
328 if(iUseInterpolation<2) // no gauss/cubic interpolation?
329 s_chan[ch].SB[29] = fa; // -> store noise val in "current sample" slot
330 return fa;
331}
332
333////////////////////////////////////////////////////////////////////////
334
335INLINE void StoreInterpolationVal(int ch,int fa)
336{
337 if(s_chan[ch].bFMod==2) // fmod freq channel
338 s_chan[ch].SB[29]=fa;
339 else
340 {
341 if((spuCtrl&0x4000)==0) fa=0; // muted?
342 else // else adjust
343 {
344 if(fa>32767L) fa=32767L;
345 if(fa<-32767L) fa=-32767L;
346 }
347
348 if(iUseInterpolation>=2) // gauss/cubic interpolation
349 {
350 int gpos = s_chan[ch].SB[28];
351 gval0 = fa;
352 gpos = (gpos+1) & 3;
353 s_chan[ch].SB[28] = gpos;
354 }
355 else
356 if(iUseInterpolation==1) // simple interpolation
357 {
358 s_chan[ch].SB[28] = 0;
359 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'
360 s_chan[ch].SB[30] = s_chan[ch].SB[31];
361 s_chan[ch].SB[31] = fa;
362 s_chan[ch].SB[32] = 1; // -> flag: calc new interolation
363 }
364 else s_chan[ch].SB[29]=fa; // no interpolation
365 }
366}
367
368////////////////////////////////////////////////////////////////////////
369
370INLINE int iGetInterpolationVal(int ch)
371{
372 int fa;
373
374 if(s_chan[ch].bFMod==2) return s_chan[ch].SB[29];
375
376 switch(iUseInterpolation)
377 {
378 //--------------------------------------------------//
379 case 3: // cubic interpolation
380 {
381 long xd;int gpos;
382 xd = ((s_chan[ch].spos) >> 1)+1;
383 gpos = s_chan[ch].SB[28];
384
385 fa = gval(3) - 3*gval(2) + 3*gval(1) - gval0;
386 fa *= (xd - (2<<15)) / 6;
387 fa >>= 15;
388 fa += gval(2) - gval(1) - gval(1) + gval0;
389 fa *= (xd - (1<<15)) >> 1;
390 fa >>= 15;
391 fa += gval(1) - gval0;
392 fa *= xd;
393 fa >>= 15;
394 fa = fa + gval0;
395
396 } break;
397 //--------------------------------------------------//
398 case 2: // gauss interpolation
399 {
400 int vl, vr;int gpos;
401 vl = (s_chan[ch].spos >> 6) & ~3;
402 gpos = s_chan[ch].SB[28];
403 vr=(gauss[vl]*gval0)&~2047;
404 vr+=(gauss[vl+1]*gval(1))&~2047;
405 vr+=(gauss[vl+2]*gval(2))&~2047;
406 vr+=(gauss[vl+3]*gval(3))&~2047;
407 fa = vr>>11;
408 } break;
409 //--------------------------------------------------//
410 case 1: // simple interpolation
411 {
412 if(s_chan[ch].sinc<0x10000L) // -> upsampling?
413 InterpolateUp(ch); // --> interpolate up
414 else InterpolateDown(ch); // --> else down
415 fa=s_chan[ch].SB[29];
416 } break;
417 //--------------------------------------------------//
418 default: // no interpolation
419 {
420 fa=s_chan[ch].SB[29];
421 } break;
422 //--------------------------------------------------//
423 }
424
425 return fa;
426}
427
428////////////////////////////////////////////////////////////////////////
429// MAIN SPU FUNCTION
430// here is the main job handler... thread, timer or direct func call
431// basically the whole sound processing is done in this fat func!
432////////////////////////////////////////////////////////////////////////
433
434// 5 ms waiting phase, if buffer is full and no new sound has to get started
435// .. can be made smaller (smallest val: 1 ms), but bigger waits give
436// better performance
437
438#define PAUSE_W 5
439#define PAUSE_L 5000
440
441////////////////////////////////////////////////////////////////////////
442
443static void *MAINThread(void *arg)
444{
8680e822 445 int s_1,s_2,fa,ns,ns_from,ns_to;
cfe71c00 446#if !defined(_MACOSX) && !defined(__arm__)
ef79bbde
P		 447 int voldiv = iVolume;
448#else
449 const int voldiv = 2;
450#endif
451 unsigned char * start;unsigned int nSample;
452 int ch,predict_nr,shift_factor,flags,d,s;
453 int bIRQReturn=0;
454
455 while(!bEndThread) // until we are shutting down
456 {
457 // ok, at the beginning we are looking if there is
458 // enuff free place in the dsound/oss buffer to
459 // fill in new data, or if there is a new channel to start.
460 // if not, we wait (thread) or return (timer/spuasync)
461 // until enuff free place is available/a new channel gets
462 // started
463
464 if(dwNewChannel) // new channel should start immedately?
465 { // (at least one bit 0 ... MAXCHANNEL is set?)
466 iSecureStart++; // -> set iSecure
467 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)
468 }
469 else iSecureStart=0; // 0: no new channel should start
470
471 while(!iSecureStart && !bEndThread && // no new start? no thread end?
472 (SoundGetBytesBuffered()>TESTSIZE)) // and still enuff data in sound buffer?
473 {
474 iSecureStart=0; // reset secure
475
476 if(iUseTimer) return 0; // linux no-thread mode? bye
477 usleep(PAUSE_L); // else sleep for x ms (linux)
478
479 if(dwNewChannel) iSecureStart=1; // if a new channel kicks in (or, of course, sound buffer runs low), we will leave the loop
480 }
481
482 //--------------------------------------------------// continue from irq handling in timer mode?
483
8680e822 484 ns_from=0;
485 ns_to=NSSIZE;
486 ch=0;
ef79bbde
P		 487 if(lastch>=0) // will be -1 if no continue is pending
488 {
8680e822 489 ch=lastch; ns_from=lastns+1; lastch=-1; // -> setup all kind of vars to continue
ef79bbde
P		 490 }
491
492 //--------------------------------------------------//
493 //- main channel loop -//
494 //--------------------------------------------------//
495 {
8680e822 496 for(;ch<MAXCHAN;ch++) // loop em all... we will collect 1 ms of sound of each playing channel
ef79bbde 497 {
6d866bb7 498 if(dwNewChannel&(1<<ch)) StartSound(ch); // start new sound
499 if(!(dwChannelOn&(1<<ch))) continue; // channel not playing? next
ef79bbde
P		 500
501 if(s_chan[ch].iActFreq!=s_chan[ch].iUsedFreq) // new psx frequency?
502 VoiceChangeFrequency(ch);
503
8680e822 504 for(ns=ns_from;ns<ns_to;ns++) // loop until 1 ms of data is reached
ef79bbde 505 {
6d866bb7 506 int sval;
507
ef79bbde
P		 508 if(s_chan[ch].bFMod==1 && iFMod[ns]) // fmod freq channel
509 FModChangeFrequency(ch,ns);
510
511 while(s_chan[ch].spos>=0x10000L)
512 {
513 if(s_chan[ch].iSBPos==28) // 28 reached?
514 {
515 start=s_chan[ch].pCurr; // set up the current pos
516
517 if (start == (unsigned char*)-1) // special "stop" sign
518 {
6d866bb7 519 dwChannelOn&=~(1<<ch); // -> turn everything off
ef79bbde
P		 520 s_chan[ch].ADSRX.EnvelopeVol=0;
521 goto ENDX; // -> and done for this channel
522 }
523
524 s_chan[ch].iSBPos=0;
525
526 //////////////////////////////////////////// spu irq handler here? mmm... do it later
527
528 s_1=s_chan[ch].s_1;
529 s_2=s_chan[ch].s_2;
530
531 predict_nr=(int)*start;start++;
532 shift_factor=predict_nr&0xf;
533 predict_nr >>= 4;
534 flags=(int)*start;start++;
535
536 // -------------------------------------- //
537
538 for (nSample=0;nSample<28;start++)
539 {
540 d=(int)*start;
541 s=((d&0xf)<<12);
542 if(s&0x8000) s|=0xffff0000;
543
544 fa=(s >> shift_factor);
545 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
546 s_2=s_1;s_1=fa;
547 s=((d & 0xf0) << 8);
548
549 s_chan[ch].SB[nSample++]=fa;
550
551 if(s&0x8000) s|=0xffff0000;
552 fa=(s>>shift_factor);
553 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
554 s_2=s_1;s_1=fa;
555
556 s_chan[ch].SB[nSample++]=fa;
557 }
558
559 //////////////////////////////////////////// irq check
560
561 if(irqCallback && (spuCtrl&0x40)) // some callback and irq active?
562 {
563 if((pSpuIrq > start-16 && // irq address reached?
564 pSpuIrq <= start) ||
565 ((flags&1) && // special: irq on looping addr, when stop/loop flag is set
566 (pSpuIrq > s_chan[ch].pLoop-16 &&
567 pSpuIrq <= s_chan[ch].pLoop)))
568 {
ef79bbde
P		 569 irqCallback(); // -> call main emu
570
571 if(iSPUIRQWait) // -> option: wait after irq for main emu
572 {
573 iSpuAsyncWait=1;
574 bIRQReturn=1;
8680e822 575 lastch=ch;
576 lastns=ns;
577 ns_to=ns+1;
ef79bbde
P		 578 }
579 }
580 }
581
582 //////////////////////////////////////////// flag handler
583
584 if((flags&4) && (!s_chan[ch].bIgnoreLoop))
585 s_chan[ch].pLoop=start-16; // loop adress
586
587 if(flags&1) // 1: stop/loop
588 {
589 // We play this block out first...
590 //if(!(flags&2)) // 1+2: do loop... otherwise: stop
591 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)
592 { // and checking if pLoop is set avoids crashes, yeah
593 start = (unsigned char*)-1;
594 }
595 else
596 {
597 start = s_chan[ch].pLoop;
598 }
599 }
600
601 s_chan[ch].pCurr=start; // store values for next cycle
602 s_chan[ch].s_1=s_1;
603 s_chan[ch].s_2=s_2;
ef79bbde
P		 604 }
605
606 fa=s_chan[ch].SB[s_chan[ch].iSBPos++]; // get sample data
607
608 StoreInterpolationVal(ch,fa); // store val for later interpolation
609
610 s_chan[ch].spos -= 0x10000L;
611 }
612
613 if(s_chan[ch].bNoise)
614 fa=iGetNoiseVal(ch); // get noise val
615 else fa=iGetInterpolationVal(ch); // get sample val
616
6d866bb7 617 sval = (MixADSR(ch) * fa) / 1023; // mix adsr
ef79bbde
P		 618
619 if(s_chan[ch].bFMod==2) // fmod freq channel
6d866bb7 620 iFMod[ns]=sval; // -> store 1T sample data, use that to do fmod on next channel
ef79bbde
P		 621 else // no fmod freq channel
622 {
623 //////////////////////////////////////////////
624 // ok, left/right sound volume (psx volume goes from 0 ... 0x3fff)
625
6d866bb7 626 SSumL[ns]+=(sval*s_chan[ch].iLeftVolume)/0x4000L;
627 SSumR[ns]+=(sval*s_chan[ch].iRightVolume)/0x4000L;
ef79bbde
P		 628
629 //////////////////////////////////////////////
630 // now let us store sound data for reverb
631
6d866bb7 632 if(s_chan[ch].bRVBActive) StoreREVERB(ch,ns,sval);
ef79bbde
P		 633 }
634
635 ////////////////////////////////////////////////
636 // ok, go on until 1 ms data of this channel is collected
637
ef79bbde 638 s_chan[ch].spos += s_chan[ch].sinc;
ef79bbde
P		 639 }
640ENDX: ;
641 }
642 }
643
8680e822 644 if(bIRQReturn) // special return for "spu irq - wait for cpu action"
645 {
646 bIRQReturn=0;
647 if(iUseTimer!=2)
648 {
649 DWORD dwWatchTime=timeGetTime_spu()+2500;
650
651 while(iSpuAsyncWait && !bEndThread &&
652 timeGetTime_spu()<dwWatchTime)
653 usleep(1000L);
654 continue;
655 }
656 else
657 {
658 return 0;
659 }
660 }
661
662
ef79bbde
P		 663 //---------------------------------------------------//
664 //- here we have another 1 ms of sound data
665 //---------------------------------------------------//
666 // mix XA infos (if any)
667
668 MixXA();
669
670 ///////////////////////////////////////////////////////
671 // mix all channels (including reverb) into one buffer
672
673 if(iDisStereo) // no stereo?
674 {
675 int dl, dr;
676 for (ns = 0; ns < NSSIZE; ns++)
677 {
678 SSumL[ns] += MixREVERBLeft(ns);
679
680 dl = SSumL[ns] / voldiv; SSumL[ns] = 0;
681 if (dl < -32767) dl = -32767; if (dl > 32767) dl = 32767;
682
683 SSumR[ns] += MixREVERBRight();
684
685 dr = SSumR[ns] / voldiv; SSumR[ns] = 0;
686 if (dr < -32767) dr = -32767; if (dr > 32767) dr = 32767;
687 *pS++ = (dl + dr) / 2;
688 }
689 }
690 else // stereo:
691 for (ns = 0; ns < NSSIZE; ns++)
692 {
693 SSumL[ns] += MixREVERBLeft(ns);
694
695 d = SSumL[ns] / voldiv; SSumL[ns] = 0;
696 if (d < -32767) d = -32767; if (d > 32767) d = 32767;
697 *pS++ = d;
698
699 SSumR[ns] += MixREVERBRight();
700
701 d = SSumR[ns] / voldiv; SSumR[ns] = 0;
702 if(d < -32767) d = -32767; if(d > 32767) d = 32767;
703 *pS++ = d;
704 }
705
706 //////////////////////////////////////////////////////
707 // special irq handling in the decode buffers (0x0000-0x1000)
708 // we know:
709 // the decode buffers are located in spu memory in the following way:
710 // 0x0000-0x03ff CD audio left
711 // 0x0400-0x07ff CD audio right
712 // 0x0800-0x0bff Voice 1
713 // 0x0c00-0x0fff Voice 3
714 // and decoded data is 16 bit for one sample
715 // we assume:
716 // even if voices 1/3 are off or no cd audio is playing, the internal
717 // play positions will move on and wrap after 0x400 bytes.
718 // Therefore: we just need a pointer from spumem+0 to spumem+3ff, and
719 // increase this pointer on each sample by 2 bytes. If this pointer
720 // (or 0x400 offsets of this pointer) hits the spuirq address, we generate
721 // an IRQ. Only problem: the "wait for cpu" option is kinda hard to do here
722 // in some of Peops timer modes. So: we ignore this option here (for now).
723
724 if(pMixIrq && irqCallback)
725 {
726 for(ns=0;ns<NSSIZE;ns++)
727 {
728 if((spuCtrl&0x40) && pSpuIrq && pSpuIrq<spuMemC+0x1000)
729 {
730 for(ch=0;ch<4;ch++)
731 {
732 if(pSpuIrq>=pMixIrq+(ch*0x400) && pSpuIrq<pMixIrq+(ch*0x400)+2)
6d866bb7 733 irqCallback();
ef79bbde
P		 734 }
735 }
736 pMixIrq+=2;if(pMixIrq>spuMemC+0x3ff) pMixIrq=spuMemC;
737 }
738 }
739
740 InitREVERB();
741
742 // feed the sound
743 // wanna have around 1/60 sec (16.666 ms) updates
744 if (iCycle++ > 16)
745 {
746 SoundFeedStreamData((unsigned char *)pSpuBuffer,
747 ((unsigned char *)pS) - ((unsigned char *)pSpuBuffer));
748 pS = (short *)pSpuBuffer;
749 iCycle = 0;
750 }
751 }
752
753 // end of big main loop...
754
755 bThreadEnded = 1;
756
757 return 0;
758}
759
760// SPU ASYNC... even newer epsxe func
761// 1 time every 'cycle' cycles... harhar
762
763void CALLBACK SPUasync(unsigned long cycle)
764{
765 if(iSpuAsyncWait)
766 {
767 iSpuAsyncWait++;
17ed0d69 768 if(iSpuAsyncWait<=16) return;
ef79bbde
P		 769 iSpuAsyncWait=0;
770 }
771
772 if(iUseTimer==2) // special mode, only used in Linux by this spu (or if you enable the experimental Windows mode)
773 {
774 if(!bSpuInit) return; // -> no init, no call
775
776 MAINThread(0); // -> linux high-compat mode
17ed0d69 777
778 // abuse iSpuAsyncWait mechanism to reduce calls to above function
779 // to make it do larger chunks
780 // note: doing it less often than once per frame causes skips
781 iSpuAsyncWait=1;
ef79bbde
P		 782 }
783}
784
785// SPU UPDATE... new epsxe func
786// 1 time every 32 hsync lines
787// (312/32)x50 in pal
788// (262/32)x60 in ntsc
789
790// since epsxe 1.5.2 (linux) uses SPUupdate, not SPUasync, I will
791// leave that func in the linux port, until epsxe linux is using
792// the async function as well
793
794void CALLBACK SPUupdate(void)
795{
796 SPUasync(0);
797}
798
799// XA AUDIO
800
801void CALLBACK SPUplayADPCMchannel(xa_decode_t *xap)
802{
803 if(!xap) return;
804 if(!xap->freq) return; // no xa freq ? bye
805
806 FeedXA(xap); // call main XA feeder
807}
808
809// CDDA AUDIO
810void CALLBACK SPUplayCDDAchannel(short *pcm, int nbytes)
811{
812 if (!pcm) return;
813 if (nbytes<=0) return;
814
815 FeedCDDA((unsigned char *)pcm, nbytes);
816}
817
818// SETUPTIMER: init of certain buffers and threads/timers
819void SetupTimer(void)
820{
821 memset(SSumR,0,NSSIZE*sizeof(int)); // init some mixing buffers
822 memset(SSumL,0,NSSIZE*sizeof(int));
823 memset(iFMod,0,NSSIZE*sizeof(int));
824 pS=(short *)pSpuBuffer; // setup soundbuffer pointer
825
826 bEndThread=0; // init thread vars
827 bThreadEnded=0;
828 bSpuInit=1; // flag: we are inited
829
830 if(!iUseTimer) // linux: use thread
831 {
832 pthread_create(&thread, NULL, MAINThread, NULL);
833 }
834}
835
836// REMOVETIMER: kill threads/timers
837void RemoveTimer(void)
838{
839 bEndThread=1; // raise flag to end thread
840
841 if(!iUseTimer) // linux tread?
842 {
843 int i=0;
844 while(!bThreadEnded && i<2000) {usleep(1000L);i++;} // -> wait until thread has ended
845 if(thread!=(pthread_t)-1) {pthread_cancel(thread);thread=(pthread_t)-1;} // -> cancel thread anyway
846 }
847
848 bThreadEnded=0; // no more spu is running
849 bSpuInit=0;
850}
851
852// SETUPSTREAMS: init most of the spu buffers
853void SetupStreams(void)
854{
855 int i;
856
857 pSpuBuffer=(unsigned char *)malloc(32768); // alloc mixing buffer
858
859 if(iUseReverb==1) i=88200*2;
860 else i=NSSIZE*2;
861
862 sRVBStart = (int *)malloc(i*4); // alloc reverb buffer
863 memset(sRVBStart,0,i*4);
864 sRVBEnd = sRVBStart + i;
865 sRVBPlay = sRVBStart;
866
867 XAStart = // alloc xa buffer
868 (uint32_t *)malloc(44100 * sizeof(uint32_t));
869 XAEnd = XAStart + 44100;
870 XAPlay = XAStart;
871 XAFeed = XAStart;
872
873 CDDAStart = // alloc cdda buffer
874 (uint32_t *)malloc(16384 * sizeof(uint32_t));
875 CDDAEnd = CDDAStart + 16384;
876 CDDAPlay = CDDAStart;
877 CDDAFeed = CDDAStart + 1;
878
879 for(i=0;i<MAXCHAN;i++) // loop sound channels
880 {
881// we don't use mutex sync... not needed, would only
882// slow us down:
883// s_chan[i].hMutex=CreateMutex(NULL,FALSE,NULL);
6d866bb7 884 s_chan[i].ADSRX.SustainLevel = 0xf; // -> init sustain
ef79bbde
P		 885 s_chan[i].pLoop=spuMemC;
886 s_chan[i].pStart=spuMemC;
887 s_chan[i].pCurr=spuMemC;
888 }
889
890 pMixIrq=spuMemC; // enable decoded buffer irqs by setting the address
891}
892
893// REMOVESTREAMS: free most buffer
894void RemoveStreams(void)
895{
896 free(pSpuBuffer); // free mixing buffer
897 pSpuBuffer = NULL;
898 free(sRVBStart); // free reverb buffer
899 sRVBStart = NULL;
900 free(XAStart); // free XA buffer
901 XAStart = NULL;
902 free(CDDAStart); // free CDDA buffer
903 CDDAStart = NULL;
904}
905
906// INIT/EXIT STUFF
907
908// SPUINIT: this func will be called first by the main emu
909long CALLBACK SPUinit(void)
910{
911 spuMemC = (unsigned char *)spuMem; // just small setup
912 memset((void *)&rvb, 0, sizeof(REVERBInfo));
913 InitADSR();
914
915 iVolume = 3;
916 iReverbOff = -1;
917 spuIrq = 0;
918 spuAddr = 0xffffffff;
919 bEndThread = 0;
920 bThreadEnded = 0;
921 spuMemC = (unsigned char *)spuMem;
922 pMixIrq = 0;
923 memset((void *)s_chan, 0, (MAXCHAN + 1) * sizeof(SPUCHAN));
924 pSpuIrq = 0;
cdb31c95 925 //iSPUIRQWait = 0;
ef79bbde
P		 926 lastch = -1;
927
d7296e10 928 //ReadConfigSPU(); // read user stuff
ef79bbde
P		 929 SetupStreams(); // prepare streaming
930
931 return 0;
932}
933
934// SPUOPEN: called by main emu after init
935long CALLBACK SPUopen(void)
936{
937 if (bSPUIsOpen) return 0; // security for some stupid main emus
938
939 SetupSound(); // setup sound (before init!)
940 SetupTimer(); // timer for feeding data
941
942 bSPUIsOpen = 1;
943
944 return PSE_SPU_ERR_SUCCESS;
945}
946
947// SPUCLOSE: called before shutdown
948long CALLBACK SPUclose(void)
949{
950 if (!bSPUIsOpen) return 0; // some security
951
952 bSPUIsOpen = 0; // no more open
953
954 RemoveTimer(); // no more feeding
955 RemoveSound(); // no more sound handling
956
957 return 0;
958}
959
960// SPUSHUTDOWN: called by main emu on final exit
961long CALLBACK SPUshutdown(void)
962{
963 SPUclose();
964 RemoveStreams(); // no more streaming
965
966 return 0;
967}
968
969// SPUTEST: we don't test, we are always fine ;)
970long CALLBACK SPUtest(void)
971{
972 return 0;
973}
974
975// SPUCONFIGURE: call config dialog
976long CALLBACK SPUconfigure(void)
977{
978#ifdef _MACOSX
979 DoConfiguration();
980#else
ee849648 981// StartCfgTool("CFG");
ef79bbde
P		 982#endif
983 return 0;
984}
985
986// SPUABOUT: show about window
987void CALLBACK SPUabout(void)
988{
989#ifdef _MACOSX
990 DoAbout();
991#else
ee849648 992// StartCfgTool("ABOUT");
ef79bbde
P		 993#endif
994}
995
996// SETUP CALLBACKS
997// this functions will be called once,
998// passes a callback that should be called on SPU-IRQ/cdda volume change
999void CALLBACK SPUregisterCallback(void (CALLBACK *callback)(void))
1000{
1001 irqCallback = callback;
1002}
1003
1004void CALLBACK SPUregisterCDDAVolume(void (CALLBACK *CDDAVcallback)(unsigned short,unsigned short))
1005{
1006 cddavCallback = CDDAVcallback;
1007}
1008
1009// COMMON PLUGIN INFO FUNCS
e906c010 1010/*
ef79bbde
P		 1011char * CALLBACK PSEgetLibName(void)
1012{
1013 return _(libraryName);
1014}
1015
1016unsigned long CALLBACK PSEgetLibType(void)
1017{
1018 return PSE_LT_SPU;
1019}
1020
1021unsigned long CALLBACK PSEgetLibVersion(void)
1022{
1023 return (1 << 16) | (6 << 8);
1024}
1025
1026char * SPUgetLibInfos(void)
1027{
1028 return _(libraryInfo);
1029}
e906c010 1030*/
6d866bb7 1031
1032// vim:shiftwidth=1:expandtab
ARM optimized PCSX fork