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spu: simplify irq and flag handling
[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 "registers.h"
24#include "cfg.h"
25#include "dsoundoss.h"
26#include "regs.h"
27
28#ifdef ENABLE_NLS
29#include <libintl.h>
30#include <locale.h>
31#define _(x) gettext(x)
32#define N_(x) (x)
33#else
34#define _(x) (x)
35#define N_(x) (x)
36#endif
37
38/*
39#if defined (USEMACOSX)
40static char * libraryName = N_("Mac OS X Sound");
41#elif defined (USEALSA)
42static char * libraryName = N_("ALSA Sound");
43#elif defined (USEOSS)
44static char * libraryName = N_("OSS Sound");
45#elif defined (USESDL)
46static char * libraryName = N_("SDL Sound");
47#elif defined (USEPULSEAUDIO)
48static char * libraryName = N_("PulseAudio Sound");
49#else
50static char * libraryName = N_("NULL Sound");
51#endif
52
53static char * libraryInfo = N_("P.E.Op.S. Sound Driver V1.7\nCoded by Pete Bernert and the P.E.Op.S. team\n");
54*/
55
56// globals
57
58// psx buffer / addresses
59
60unsigned short regArea[10000];
61unsigned short spuMem[256*1024];
62unsigned char * spuMemC;
63unsigned char * pSpuIrq=0;
64unsigned char * pSpuBuffer;
65unsigned char * pMixIrq=0;
66
67// user settings
68
69int iVolume=3;
70int iXAPitch=1;
71int iUseTimer=2;
72int iSPUIRQWait=1;
73int iDebugMode=0;
74int iRecordMode=0;
75int iUseReverb=2;
76int iUseInterpolation=2;
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
98unsigned long dwChannelOn=0;
99unsigned long dwPendingChanOff=0;
100
101void (CALLBACK *irqCallback)(void)=0; // func of main emu, called on spu irq
102void (CALLBACK *cddavCallback)(unsigned short,unsigned short)=0;
103
104// certain globals (were local before, but with the new timeproc I need em global)
105
106static const int f[8][2] = { { 0, 0 },
107 { 60, 0 },
108 { 115, -52 },
109 { 98, -55 },
110 { 122, -60 } };
111int SSumLR[NSSIZE*2];
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
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;
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
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
428static void do_irq(void)
429{
430 if(!(spuStat & STAT_IRQ))
431 {
432 spuStat |= STAT_IRQ;
433 if(irqCallback) irqCallback();
434 }
435}
436
437static int decode_block(int ch)
438{
439 unsigned char *start;
440 unsigned int nSample;
441 int predict_nr,shift_factor,flags,d,s;
442 int fa,s_1,s_2;
443 int ret = 0;
444
445 s_chan[ch].iSBPos=0;
446
447 start=s_chan[ch].pCurr; // set up the current pos
448 if(start == (unsigned char*)-1 || // special "stop" sign
449 (dwPendingChanOff&(1<<ch)))
450 {
451 dwChannelOn&=~(1<<ch); // -> turn everything off
452 dwPendingChanOff&=~(1<<ch);
453 s_chan[ch].bStop=1;
454 s_chan[ch].ADSRX.EnvelopeVol=0;
455 return 0; // -> and done for this channel
456 }
457
458 //////////////////////////////////////////// irq check
459
460 if(spuCtrl&CTRL_IRQ)
461 {
462 if(pSpuIrq == start) // irq address reached?
463 {
464 do_irq(); // -> call main emu
465 ret = 1;
466 }
467 }
468
469 s_1=s_chan[ch].s_1;
470 s_2=s_chan[ch].s_2;
471
472 predict_nr=(int)*start;start++;
473 shift_factor=predict_nr&0xf;
474 predict_nr >>= 4;
475 flags=(int)*start;start++;
476
477 // -------------------------------------- //
478
479 for (nSample=0;nSample<28;start++)
480 {
481 d=(int)*start;
482 s=((d&0xf)<<12);
483 if(s&0x8000) s|=0xffff0000;
484
485 fa=(s >> shift_factor);
486 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
487 s_2=s_1;s_1=fa;
488 s=((d & 0xf0) << 8);
489
490 s_chan[ch].SB[nSample++]=fa;
491
492 if(s&0x8000) s|=0xffff0000;
493 fa=(s>>shift_factor);
494 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
495 s_2=s_1;s_1=fa;
496
497 s_chan[ch].SB[nSample++]=fa;
498 }
499
500 //////////////////////////////////////////// flag handler
501
502 if((flags&4) && (!s_chan[ch].bIgnoreLoop))
503 s_chan[ch].pLoop=start-16; // loop adress
504
505 if(flags&1) // 1: stop/loop
506 {
507 if(!(flags&2))
508 dwPendingChanOff|=1<<ch;
509
510 start = s_chan[ch].pLoop;
511 }
512
513 if (start - spuMemC >= 0x80000)
514 start = (unsigned char*)-1;
515
516 s_chan[ch].pCurr=start; // store values for next cycle
517 s_chan[ch].s_1=s_1;
518 s_chan[ch].s_2=s_2;
519
520 return ret;
521}
522
523////////////////////////////////////////////////////////////////////////
524// MAIN SPU FUNCTION
525// here is the main job handler... thread, timer or direct func call
526// basically the whole sound processing is done in this fat func!
527////////////////////////////////////////////////////////////////////////
528
529// 5 ms waiting phase, if buffer is full and no new sound has to get started
530// .. can be made smaller (smallest val: 1 ms), but bigger waits give
531// better performance
532
533#define PAUSE_W 5
534#define PAUSE_L 5000
535
536////////////////////////////////////////////////////////////////////////
537
538static void *MAINThread(void *arg)
539{
540 int fa,ns,ns_from,ns_to;
541#if !defined(_MACOSX) && !defined(__arm__)
542 int voldiv = iVolume;
543#else
544 const int voldiv = 2;
545#endif
546 int ch,d;
547 int bIRQReturn=0;
548
549 while(!bEndThread) // until we are shutting down
550 {
551 // ok, at the beginning we are looking if there is
552 // enuff free place in the dsound/oss buffer to
553 // fill in new data, or if there is a new channel to start.
554 // if not, we wait (thread) or return (timer/spuasync)
555 // until enuff free place is available/a new channel gets
556 // started
557
558 if(dwNewChannel) // new channel should start immedately?
559 { // (at least one bit 0 ... MAXCHANNEL is set?)
560 iSecureStart++; // -> set iSecure
561 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)
562 }
563 else iSecureStart=0; // 0: no new channel should start
564
565 while(!iSecureStart && !bEndThread && // no new start? no thread end?
566 (SoundGetBytesBuffered()>TESTSIZE)) // and still enuff data in sound buffer?
567 {
568 iSecureStart=0; // reset secure
569
570 if(iUseTimer) return 0; // linux no-thread mode? bye
571 usleep(PAUSE_L); // else sleep for x ms (linux)
572
573 if(dwNewChannel) iSecureStart=1; // if a new channel kicks in (or, of course, sound buffer runs low), we will leave the loop
574 }
575
576 //--------------------------------------------------// continue from irq handling in timer mode?
577
578 ns_from=0;
579 ns_to=NSSIZE;
580 ch=0;
581 if(lastch>=0) // will be -1 if no continue is pending
582 {
583 ch=lastch; ns_from=lastns; lastch=-1; // -> setup all kind of vars to continue
584 }
585
586 //--------------------------------------------------//
587 //- main channel loop -//
588 //--------------------------------------------------//
589 {
590 for(;ch<MAXCHAN;ch++) // loop em all... we will collect 1 ms of sound of each playing channel
591 {
592 if(dwNewChannel&(1<<ch)) StartSound(ch); // start new sound
593 if(!(dwChannelOn&(1<<ch))) continue; // channel not playing? next
594
595 if(s_chan[ch].iActFreq!=s_chan[ch].iUsedFreq) // new psx frequency?
596 VoiceChangeFrequency(ch);
597
598 for(ns=ns_from;ns<ns_to;ns++) // loop until 1 ms of data is reached
599 {
600 int sval;
601
602 if(!(dwChannelOn&(1<<ch))) break; // something turned ch off (adsr or flags)
603
604 if(s_chan[ch].bFMod==1 && iFMod[ns]) // fmod freq channel
605 FModChangeFrequency(ch,ns);
606
607 while(s_chan[ch].spos>=0x10000L)
608 {
609 if(s_chan[ch].iSBPos==28) // 28 reached?
610 {
611 d = decode_block(ch);
612 if(d && iSPUIRQWait) // -> option: wait after irq for main emu
613 {
614 bIRQReturn=1;
615 lastch=ch;
616 lastns=ns_to=ns;
617 goto ENDX; // do remaining chans unil this ns
618 }
619 }
620
621 fa=s_chan[ch].SB[s_chan[ch].iSBPos++]; // get sample data
622
623 StoreInterpolationVal(ch,fa); // store val for later interpolation
624
625 s_chan[ch].spos -= 0x10000L;
626 }
627
628 if(s_chan[ch].bNoise)
629 fa=iGetNoiseVal(ch); // get noise val
630 else fa=iGetInterpolationVal(ch); // get sample val
631
632 sval = (MixADSR(ch) * fa) / 1024; // mix adsr
633
634 if(s_chan[ch].bFMod==2) // fmod freq channel
635 iFMod[ns]=sval; // -> store 1T sample data, use that to do fmod on next channel
636 else // no fmod freq channel
637 {
638 //////////////////////////////////////////////
639 // ok, left/right sound volume (psx volume goes from 0 ... 0x3fff)
640
641 SSumLR[ns*2] +=(sval*s_chan[ch].iLeftVolume)/0x4000L;
642 SSumLR[ns*2+1]+=(sval*s_chan[ch].iRightVolume)/0x4000L;
643
644 //////////////////////////////////////////////
645 // now let us store sound data for reverb
646
647 if(s_chan[ch].bRVBActive) StoreREVERB(ch,ns,sval);
648 }
649
650 ////////////////////////////////////////////////
651 // ok, go on until 1 ms data of this channel is collected
652
653 s_chan[ch].spos += s_chan[ch].sinc;
654 }
655ENDX: ;
656 }
657 }
658
659 if(bIRQReturn && iSPUIRQWait) // special return for "spu irq - wait for cpu action"
660 {
661 iSpuAsyncWait=1;
662 bIRQReturn=0;
663 if(iUseTimer!=2)
664 {
665 DWORD dwWatchTime=timeGetTime_spu()+2500;
666
667 while(iSpuAsyncWait && !bEndThread &&
668 timeGetTime_spu()<dwWatchTime)
669 usleep(1000L);
670 continue;
671 }
672 else
673 {
674 return 0;
675 }
676 }
677
678
679 //---------------------------------------------------//
680 //- here we have another 1 ms of sound data
681 //---------------------------------------------------//
682 // mix XA infos (if any)
683
684 MixXA();
685
686 ///////////////////////////////////////////////////////
687 // mix all channels (including reverb) into one buffer
688
689 for (ns = 0; ns < NSSIZE*2; )
690 {
691 SSumLR[ns] += MixREVERBLeft(ns/2);
692
693 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
694 if (d < -32767) d = -32767; if (d > 32767) d = 32767;
695 *pS++ = d;
696 ns++;
697
698 SSumLR[ns] += MixREVERBRight();
699
700 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
701 if(d < -32767) d = -32767; if(d > 32767) d = 32767;
702 *pS++ = d;
703 ns++;
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)
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)
733 do_irq();
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++;
768 if(iSpuAsyncWait<=16) return;
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
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;
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(SSumLR,0,sizeof(SSumLR)); // init some mixing buffers
822 memset(iFMod,0,NSSIZE*sizeof(int));
823 pS=(short *)pSpuBuffer; // setup soundbuffer pointer
824
825 bEndThread=0; // init thread vars
826 bThreadEnded=0;
827 bSpuInit=1; // flag: we are inited
828
829 if(!iUseTimer) // linux: use thread
830 {
831 pthread_create(&thread, NULL, MAINThread, NULL);
832 }
833}
834
835// REMOVETIMER: kill threads/timers
836void RemoveTimer(void)
837{
838 bEndThread=1; // raise flag to end thread
839
840 if(!iUseTimer) // linux tread?
841 {
842 int i=0;
843 while(!bThreadEnded && i<2000) {usleep(1000L);i++;} // -> wait until thread has ended
844 if(thread!=(pthread_t)-1) {pthread_cancel(thread);thread=(pthread_t)-1;} // -> cancel thread anyway
845 }
846
847 bThreadEnded=0; // no more spu is running
848 bSpuInit=0;
849}
850
851// SETUPSTREAMS: init most of the spu buffers
852void SetupStreams(void)
853{
854 int i;
855
856 pSpuBuffer=(unsigned char *)malloc(32768); // alloc mixing buffer
857
858 if(iUseReverb==1) i=88200*2;
859 else i=NSSIZE*2;
860
861 sRVBStart = (int *)malloc(i*4); // alloc reverb buffer
862 memset(sRVBStart,0,i*4);
863 sRVBEnd = sRVBStart + i;
864 sRVBPlay = sRVBStart;
865
866 XAStart = // alloc xa buffer
867 (uint32_t *)malloc(44100 * sizeof(uint32_t));
868 XAEnd = XAStart + 44100;
869 XAPlay = XAStart;
870 XAFeed = XAStart;
871
872 CDDAStart = // alloc cdda buffer
873 (uint32_t *)malloc(16384 * sizeof(uint32_t));
874 CDDAEnd = CDDAStart + 16384;
875 CDDAPlay = CDDAStart;
876 CDDAFeed = CDDAStart;
877
878 for(i=0;i<MAXCHAN;i++) // loop sound channels
879 {
880// we don't use mutex sync... not needed, would only
881// slow us down:
882// s_chan[i].hMutex=CreateMutex(NULL,FALSE,NULL);
883 s_chan[i].ADSRX.SustainLevel = 0xf; // -> init sustain
884 s_chan[i].pLoop=spuMemC;
885 s_chan[i].pStart=spuMemC;
886 s_chan[i].pCurr=spuMemC;
887 }
888
889 pMixIrq=spuMemC; // enable decoded buffer irqs by setting the address
890}
891
892// REMOVESTREAMS: free most buffer
893void RemoveStreams(void)
894{
895 free(pSpuBuffer); // free mixing buffer
896 pSpuBuffer = NULL;
897 free(sRVBStart); // free reverb buffer
898 sRVBStart = NULL;
899 free(XAStart); // free XA buffer
900 XAStart = NULL;
901 free(CDDAStart); // free CDDA buffer
902 CDDAStart = NULL;
903}
904
905// INIT/EXIT STUFF
906
907// SPUINIT: this func will be called first by the main emu
908long CALLBACK SPUinit(void)
909{
910 spuMemC = (unsigned char *)spuMem; // just small setup
911 memset((void *)&rvb, 0, sizeof(REVERBInfo));
912 InitADSR();
913
914 iVolume = 3;
915 iReverbOff = -1;
916 spuIrq = 0;
917 spuAddr = 0xffffffff;
918 bEndThread = 0;
919 bThreadEnded = 0;
920 spuMemC = (unsigned char *)spuMem;
921 pMixIrq = 0;
922 memset((void *)s_chan, 0, (MAXCHAN + 1) * sizeof(SPUCHAN));
923 pSpuIrq = 0;
924 //iSPUIRQWait = 0;
925 lastch = -1;
926
927 //ReadConfigSPU(); // read user stuff
928 SetupStreams(); // prepare streaming
929
930 return 0;
931}
932
933// SPUOPEN: called by main emu after init
934long CALLBACK SPUopen(void)
935{
936 if (bSPUIsOpen) return 0; // security for some stupid main emus
937
938 SetupSound(); // setup sound (before init!)
939 SetupTimer(); // timer for feeding data
940
941 bSPUIsOpen = 1;
942
943 return PSE_SPU_ERR_SUCCESS;
944}
945
946// SPUCLOSE: called before shutdown
947long CALLBACK SPUclose(void)
948{
949 if (!bSPUIsOpen) return 0; // some security
950
951 bSPUIsOpen = 0; // no more open
952
953 RemoveTimer(); // no more feeding
954 RemoveSound(); // no more sound handling
955
956 return 0;
957}
958
959// SPUSHUTDOWN: called by main emu on final exit
960long CALLBACK SPUshutdown(void)
961{
962 SPUclose();
963 RemoveStreams(); // no more streaming
964
965 return 0;
966}
967
968// SPUTEST: we don't test, we are always fine ;)
969long CALLBACK SPUtest(void)
970{
971 return 0;
972}
973
974// SPUCONFIGURE: call config dialog
975long CALLBACK SPUconfigure(void)
976{
977#ifdef _MACOSX
978 DoConfiguration();
979#else
980// StartCfgTool("CFG");
981#endif
982 return 0;
983}
984
985// SPUABOUT: show about window
986void CALLBACK SPUabout(void)
987{
988#ifdef _MACOSX
989 DoAbout();
990#else
991// StartCfgTool("ABOUT");
992#endif
993}
994
995// SETUP CALLBACKS
996// this functions will be called once,
997// passes a callback that should be called on SPU-IRQ/cdda volume change
998void CALLBACK SPUregisterCallback(void (CALLBACK *callback)(void))
999{
1000 irqCallback = callback;
1001}
1002
1003void CALLBACK SPUregisterCDDAVolume(void (CALLBACK *CDDAVcallback)(unsigned short,unsigned short))
1004{
1005 cddavCallback = CDDAVcallback;
1006}
1007
1008// COMMON PLUGIN INFO FUNCS
1009/*
1010char * CALLBACK PSEgetLibName(void)
1011{
1012 return _(libraryName);
1013}
1014
1015unsigned long CALLBACK PSEgetLibType(void)
1016{
1017 return PSE_LT_SPU;
1018}
1019
1020unsigned long CALLBACK PSEgetLibVersion(void)
1021{
1022 return (1 << 16) | (6 << 8);
1023}
1024
1025char * SPUgetLibInfos(void)
1026{
1027 return _(libraryInfo);
1028}
1029*/
1030
1031// vim:shiftwidth=1:expandtab
ARM optimized PCSX fork