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spu: do adsr on whole buffer
[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"
3fc2a4c2 23#include "registers.h"
ef79bbde
P		 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
6d866bb7 38/*
ef79bbde
P		 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");
6d866bb7 54*/
ef79bbde
P		 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;
ef79bbde
P		 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;
3fc2a4c2 99unsigned long dwPendingChanOff=0;
ef79bbde
P		 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
6d866bb7 106static const int f[8][2] = { { 0, 0 },
ef79bbde
P		 107 { 60, 0 },
108 { 115, -52 },
109 { 98, -55 },
110 { 122, -60 } };
1ab7621a 111int ChanBuf[NSSIZE];
97ea4077 112int SSumLR[NSSIZE*2];
ef79bbde
P		 113int iFMod[NSSIZE];
114int iCycle = 0;
115short * pS;
116
117int lastch=-1; // last channel processed on spu irq in timer mode
118static int lastns=0; // last ns pos
119static int iSecureStart=0; // secure start counter
120
121////////////////////////////////////////////////////////////////////////
122// CODE AREA
123////////////////////////////////////////////////////////////////////////
124
125// dirty inline func includes
126
127#include "reverb.c"
128#include "adsr.c"
129
130////////////////////////////////////////////////////////////////////////
131// helpers for simple interpolation
132
133//
134// easy interpolation on upsampling, no special filter, just "Pete's common sense" tm
135//
136// instead of having n equal sample values in a row like:
137// ____
138// |____
139//
140// we compare the current delta change with the next delta change.
141//
142// if curr_delta is positive,
143//
144// - and next delta is smaller (or changing direction):
145// \.
146// -__
147//
148// - and next delta significant (at least twice) bigger:
149// --_
150// \.
151//
152// - and next delta is nearly same:
153// \.
154// \.
155//
156//
157// if curr_delta is negative,
158//
159// - and next delta is smaller (or changing direction):
160// _--
161// /
162//
163// - and next delta significant (at least twice) bigger:
164// /
165// __-
166//
167// - and next delta is nearly same:
168// /
169// /
170//
171
172
173INLINE void InterpolateUp(int ch)
174{
175 if(s_chan[ch].SB[32]==1) // flag == 1? calc step and set flag... and don't change the value in this pass
176 {
177 const int id1=s_chan[ch].SB[30]-s_chan[ch].SB[29]; // curr delta to next val
178 const int id2=s_chan[ch].SB[31]-s_chan[ch].SB[30]; // and next delta to next-next val :)
179
180 s_chan[ch].SB[32]=0;
181
182 if(id1>0) // curr delta positive
183 {
184 if(id2<id1)
185 {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
186 else
187 if(id2<(id1<<1))
188 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
189 else
190 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
191 }
192 else // curr delta negative
193 {
194 if(id2>id1)
195 {s_chan[ch].SB[28]=id1;s_chan[ch].SB[32]=2;}
196 else
197 if(id2>(id1<<1))
198 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x10000L;
199 else
200 s_chan[ch].SB[28]=(id1*s_chan[ch].sinc)/0x20000L;
201 }
202 }
203 else
204 if(s_chan[ch].SB[32]==2) // flag 1: calc step and set flag... and don't change the value in this pass
205 {
206 s_chan[ch].SB[32]=0;
207
208 s_chan[ch].SB[28]=(s_chan[ch].SB[28]*s_chan[ch].sinc)/0x20000L;
209 if(s_chan[ch].sinc<=0x8000)
210 s_chan[ch].SB[29]=s_chan[ch].SB[30]-(s_chan[ch].SB[28]*((0x10000/s_chan[ch].sinc)-1));
211 else s_chan[ch].SB[29]+=s_chan[ch].SB[28];
212 }
213 else // no flags? add bigger val (if possible), calc smaller step, set flag1
214 s_chan[ch].SB[29]+=s_chan[ch].SB[28];
215}
216
217//
218// even easier interpolation on downsampling, also no special filter, again just "Pete's common sense" tm
219//
220
221INLINE void InterpolateDown(int ch)
222{
223 if(s_chan[ch].sinc>=0x20000L) // we would skip at least one val?
224 {
225 s_chan[ch].SB[29]+=(s_chan[ch].SB[30]-s_chan[ch].SB[29])/2; // add easy weight
226 if(s_chan[ch].sinc>=0x30000L) // we would skip even more vals?
227 s_chan[ch].SB[29]+=(s_chan[ch].SB[31]-s_chan[ch].SB[30])/2;// add additional next weight
228 }
229}
230
231////////////////////////////////////////////////////////////////////////
232// helpers for gauss interpolation
233
234#define gval0 (((short*)(&s_chan[ch].SB[29]))[gpos])
235#define gval(x) (((short*)(&s_chan[ch].SB[29]))[(gpos+x)&3])
236
237#include "gauss_i.h"
238
239////////////////////////////////////////////////////////////////////////
240
241#include "xa.c"
242
243////////////////////////////////////////////////////////////////////////
244// START SOUND... called by main thread to setup a new sound on a channel
245////////////////////////////////////////////////////////////////////////
246
247INLINE void StartSound(int ch)
248{
249 StartADSR(ch);
250 StartREVERB(ch);
251
b00afb77 252 // fussy timing issues - do in VoiceOn
253 //s_chan[ch].pCurr=s_chan[ch].pStart; // set sample start
254 //s_chan[ch].bStop=0;
255 //s_chan[ch].bOn=1;
ef79bbde
P		 256
257 s_chan[ch].s_1=0; // init mixing vars
258 s_chan[ch].s_2=0;
259 s_chan[ch].iSBPos=28;
260
ef79bbde
P		 261 s_chan[ch].SB[29]=0; // init our interpolation helpers
262 s_chan[ch].SB[30]=0;
263
264 if(iUseInterpolation>=2) // gauss interpolation?
265 {s_chan[ch].spos=0x30000L;s_chan[ch].SB[28]=0;} // -> start with more decoding
266 else {s_chan[ch].spos=0x10000L;s_chan[ch].SB[31]=0;} // -> no/simple interpolation starts with one 44100 decoding
267
268 dwNewChannel&=~(1<<ch); // clear new channel bit
269}
270
271////////////////////////////////////////////////////////////////////////
272// ALL KIND OF HELPERS
273////////////////////////////////////////////////////////////////////////
274
275INLINE void VoiceChangeFrequency(int ch)
276{
277 s_chan[ch].iUsedFreq=s_chan[ch].iActFreq; // -> take it and calc steps
278 s_chan[ch].sinc=s_chan[ch].iRawPitch<<4;
279 if(!s_chan[ch].sinc) s_chan[ch].sinc=1;
280 if(iUseInterpolation==1) s_chan[ch].SB[32]=1; // -> freq change in simle imterpolation mode: set flag
281}
282
283////////////////////////////////////////////////////////////////////////
284
285INLINE void FModChangeFrequency(int ch,int ns)
286{
287 int NP=s_chan[ch].iRawPitch;
288
289 NP=((32768L+iFMod[ns])*NP)/32768L;
290
291 if(NP>0x3fff) NP=0x3fff;
292 if(NP<0x1) NP=0x1;
293
294 NP=(44100L*NP)/(4096L); // calc frequency
295
296 s_chan[ch].iActFreq=NP;
297 s_chan[ch].iUsedFreq=NP;
298 s_chan[ch].sinc=(((NP/10)<<16)/4410);
299 if(!s_chan[ch].sinc) s_chan[ch].sinc=1;
300 if(iUseInterpolation==1) // freq change in simple interpolation mode
301 s_chan[ch].SB[32]=1;
302 iFMod[ns]=0;
303}
304
305////////////////////////////////////////////////////////////////////////
306
307// noise handler... just produces some noise data
308// surely wrong... and no noise frequency (spuCtrl&0x3f00) will be used...
309// and sometimes the noise will be used as fmod modulation... pfff
310
311INLINE int iGetNoiseVal(int ch)
312{
313 int fa;
314
315 if((dwNoiseVal<<=1)&0x80000000L)
316 {
317 dwNoiseVal^=0x0040001L;
318 fa=((dwNoiseVal>>2)&0x7fff);
319 fa=-fa;
320 }
321 else fa=(dwNoiseVal>>2)&0x7fff;
322
323 // mmm... depending on the noise freq we allow bigger/smaller changes to the previous val
324 fa=s_chan[ch].iOldNoise+((fa-s_chan[ch].iOldNoise)/((0x001f-((spuCtrl&0x3f00)>>9))+1));
325 if(fa>32767L) fa=32767L;
326 if(fa<-32767L) fa=-32767L;
327 s_chan[ch].iOldNoise=fa;
328
329 if(iUseInterpolation<2) // no gauss/cubic interpolation?
330 s_chan[ch].SB[29] = fa; // -> store noise val in "current sample" slot
331 return fa;
332}
333
334////////////////////////////////////////////////////////////////////////
335
336INLINE void StoreInterpolationVal(int ch,int fa)
337{
338 if(s_chan[ch].bFMod==2) // fmod freq channel
339 s_chan[ch].SB[29]=fa;
340 else
341 {
342 if((spuCtrl&0x4000)==0) fa=0; // muted?
343 else // else adjust
344 {
345 if(fa>32767L) fa=32767L;
346 if(fa<-32767L) fa=-32767L;
347 }
348
349 if(iUseInterpolation>=2) // gauss/cubic interpolation
350 {
351 int gpos = s_chan[ch].SB[28];
352 gval0 = fa;
353 gpos = (gpos+1) & 3;
354 s_chan[ch].SB[28] = gpos;
355 }
356 else
357 if(iUseInterpolation==1) // simple interpolation
358 {
359 s_chan[ch].SB[28] = 0;
360 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'
361 s_chan[ch].SB[30] = s_chan[ch].SB[31];
362 s_chan[ch].SB[31] = fa;
363 s_chan[ch].SB[32] = 1; // -> flag: calc new interolation
364 }
365 else s_chan[ch].SB[29]=fa; // no interpolation
366 }
367}
368
369////////////////////////////////////////////////////////////////////////
370
371INLINE int iGetInterpolationVal(int ch)
372{
373 int fa;
374
375 if(s_chan[ch].bFMod==2) return s_chan[ch].SB[29];
376
377 switch(iUseInterpolation)
378 {
379 //--------------------------------------------------//
380 case 3: // cubic interpolation
381 {
382 long xd;int gpos;
383 xd = ((s_chan[ch].spos) >> 1)+1;
384 gpos = s_chan[ch].SB[28];
385
386 fa = gval(3) - 3*gval(2) + 3*gval(1) - gval0;
387 fa *= (xd - (2<<15)) / 6;
388 fa >>= 15;
389 fa += gval(2) - gval(1) - gval(1) + gval0;
390 fa *= (xd - (1<<15)) >> 1;
391 fa >>= 15;
392 fa += gval(1) - gval0;
393 fa *= xd;
394 fa >>= 15;
395 fa = fa + gval0;
396
397 } break;
398 //--------------------------------------------------//
399 case 2: // gauss interpolation
400 {
401 int vl, vr;int gpos;
402 vl = (s_chan[ch].spos >> 6) & ~3;
403 gpos = s_chan[ch].SB[28];
404 vr=(gauss[vl]*gval0)&~2047;
405 vr+=(gauss[vl+1]*gval(1))&~2047;
406 vr+=(gauss[vl+2]*gval(2))&~2047;
407 vr+=(gauss[vl+3]*gval(3))&~2047;
408 fa = vr>>11;
409 } break;
410 //--------------------------------------------------//
411 case 1: // simple interpolation
412 {
413 if(s_chan[ch].sinc<0x10000L) // -> upsampling?
414 InterpolateUp(ch); // --> interpolate up
415 else InterpolateDown(ch); // --> else down
416 fa=s_chan[ch].SB[29];
417 } break;
418 //--------------------------------------------------//
419 default: // no interpolation
420 {
421 fa=s_chan[ch].SB[29];
422 } break;
423 //--------------------------------------------------//
424 }
425
426 return fa;
427}
428
3fc2a4c2 429static void do_irq(void)
430{
431 if(!(spuStat & STAT_IRQ))
432 {
433 spuStat |= STAT_IRQ;
434 if(irqCallback) irqCallback();
435 }
436}
437
e11ae5c5 438static int decode_block(int ch)
439{
440 unsigned char *start;
441 unsigned int nSample;
442 int predict_nr,shift_factor,flags,d,s;
443 int fa,s_1,s_2;
444 int ret = 0;
445
446 s_chan[ch].iSBPos=0;
447
448 start=s_chan[ch].pCurr; // set up the current pos
3fc2a4c2 449 if(start == (unsigned char*)-1 || // special "stop" sign
450 (dwPendingChanOff&(1<<ch)))
e11ae5c5 451 {
452 dwChannelOn&=~(1<<ch); // -> turn everything off
3fc2a4c2 453 dwPendingChanOff&=~(1<<ch);
e11ae5c5 454 s_chan[ch].bStop=1;
455 s_chan[ch].ADSRX.EnvelopeVol=0;
456 return 0; // -> and done for this channel
457 }
458
3fc2a4c2 459 //////////////////////////////////////////// irq check
460
461 if(spuCtrl&CTRL_IRQ)
462 {
463 if(pSpuIrq == start) // irq address reached?
464 {
465 do_irq(); // -> call main emu
466 ret = 1;
467 }
468 }
e11ae5c5 469
470 s_1=s_chan[ch].s_1;
471 s_2=s_chan[ch].s_2;
472
473 predict_nr=(int)*start;start++;
474 shift_factor=predict_nr&0xf;
475 predict_nr >>= 4;
476 flags=(int)*start;start++;
477
478 // -------------------------------------- //
479
480 for (nSample=0;nSample<28;start++)
481 {
482 d=(int)*start;
483 s=((d&0xf)<<12);
484 if(s&0x8000) s|=0xffff0000;
485
486 fa=(s >> shift_factor);
487 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
488 s_2=s_1;s_1=fa;
489 s=((d & 0xf0) << 8);
490
491 s_chan[ch].SB[nSample++]=fa;
492
493 if(s&0x8000) s|=0xffff0000;
494 fa=(s>>shift_factor);
495 fa=fa + ((s_1 * f[predict_nr][0])>>6) + ((s_2 * f[predict_nr][1])>>6);
496 s_2=s_1;s_1=fa;
497
498 s_chan[ch].SB[nSample++]=fa;
499 }
500
e11ae5c5 501 //////////////////////////////////////////// flag handler
502
503 if((flags&4) && (!s_chan[ch].bIgnoreLoop))
504 s_chan[ch].pLoop=start-16; // loop adress
505
506 if(flags&1) // 1: stop/loop
507 {
3fc2a4c2 508 if(!(flags&2))
509 dwPendingChanOff|=1<<ch;
510
511 start = s_chan[ch].pLoop;
e11ae5c5 512 }
513
514 if (start - spuMemC >= 0x80000)
515 start = (unsigned char*)-1;
516
517 s_chan[ch].pCurr=start; // store values for next cycle
518 s_chan[ch].s_1=s_1;
519 s_chan[ch].s_2=s_2;
520
521 return ret;
522}
523
ef79bbde
P		 524////////////////////////////////////////////////////////////////////////
525// MAIN SPU FUNCTION
526// here is the main job handler... thread, timer or direct func call
527// basically the whole sound processing is done in this fat func!
528////////////////////////////////////////////////////////////////////////
529
530// 5 ms waiting phase, if buffer is full and no new sound has to get started
531// .. can be made smaller (smallest val: 1 ms), but bigger waits give
532// better performance
533
534#define PAUSE_W 5
535#define PAUSE_L 5000
536
537////////////////////////////////////////////////////////////////////////
538
539static void *MAINThread(void *arg)
540{
e11ae5c5 541 int fa,ns,ns_from,ns_to;
cfe71c00 542#if !defined(_MACOSX) && !defined(__arm__)
ef79bbde
P		 543 int voldiv = iVolume;
544#else
545 const int voldiv = 2;
546#endif
e11ae5c5 547 int ch,d;
ef79bbde
P		 548 int bIRQReturn=0;
549
550 while(!bEndThread) // until we are shutting down
551 {
552 // ok, at the beginning we are looking if there is
553 // enuff free place in the dsound/oss buffer to
554 // fill in new data, or if there is a new channel to start.
555 // if not, we wait (thread) or return (timer/spuasync)
556 // until enuff free place is available/a new channel gets
557 // started
558
559 if(dwNewChannel) // new channel should start immedately?
560 { // (at least one bit 0 ... MAXCHANNEL is set?)
561 iSecureStart++; // -> set iSecure
562 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)
563 }
564 else iSecureStart=0; // 0: no new channel should start
565
566 while(!iSecureStart && !bEndThread && // no new start? no thread end?
567 (SoundGetBytesBuffered()>TESTSIZE)) // and still enuff data in sound buffer?
568 {
569 iSecureStart=0; // reset secure
570
571 if(iUseTimer) return 0; // linux no-thread mode? bye
572 usleep(PAUSE_L); // else sleep for x ms (linux)
573
574 if(dwNewChannel) iSecureStart=1; // if a new channel kicks in (or, of course, sound buffer runs low), we will leave the loop
575 }
576
577 //--------------------------------------------------// continue from irq handling in timer mode?
578
8680e822 579 ns_from=0;
580 ns_to=NSSIZE;
581 ch=0;
ef79bbde
P		 582 if(lastch>=0) // will be -1 if no continue is pending
583 {
e11ae5c5 584 ch=lastch; ns_from=lastns; lastch=-1; // -> setup all kind of vars to continue
ef79bbde
P		 585 }
586
587 //--------------------------------------------------//
588 //- main channel loop -//
589 //--------------------------------------------------//
590 {
8680e822 591 for(;ch<MAXCHAN;ch++) // loop em all... we will collect 1 ms of sound of each playing channel
ef79bbde 592 {
6d866bb7 593 if(dwNewChannel&(1<<ch)) StartSound(ch); // start new sound
594 if(!(dwChannelOn&(1<<ch))) continue; // channel not playing? next
ef79bbde
P		 595
596 if(s_chan[ch].iActFreq!=s_chan[ch].iUsedFreq) // new psx frequency?
597 VoiceChangeFrequency(ch);
598
8680e822 599 for(ns=ns_from;ns<ns_to;ns++) // loop until 1 ms of data is reached
ef79bbde 600 {
e11ae5c5 601 if(!(dwChannelOn&(1<<ch))) break; // something turned ch off (adsr or flags)
602
ef79bbde
P		 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 {
e11ae5c5 610 d = decode_block(ch);
611 if(d && iSPUIRQWait) // -> option: wait after irq for main emu
ef79bbde 612 {
e11ae5c5 613 bIRQReturn=1;
614 lastch=ch;
615 lastns=ns_to=ns;
616 goto ENDX; // do remaining chans unil this ns
ef79bbde 617 }
ef79bbde
P		 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
1ab7621a 630 ChanBuf[ns]=fa;
631
632 ////////////////////////////////////////////////
633 // ok, go on until 1 ms data of this channel is collected
634
635 s_chan[ch].spos += s_chan[ch].sinc;
636ENDX: ;
637 }
ef79bbde 638
1ab7621a 639 MixADSR(ch, ns_from, ns_to);
640
641 if(s_chan[ch].bFMod==2) // fmod freq channel
642 memcpy(iFMod, ChanBuf, sizeof(iFMod));
643 else for(ns=ns_from;ns<ns_to;ns++)
644 {
645 int sval = ChanBuf[ns];
ef79bbde 646
ef79bbde
P		 647 {
648 //////////////////////////////////////////////
649 // ok, left/right sound volume (psx volume goes from 0 ... 0x3fff)
650
97ea4077 651 SSumLR[ns*2] +=(sval*s_chan[ch].iLeftVolume)/0x4000L;
652 SSumLR[ns*2+1]+=(sval*s_chan[ch].iRightVolume)/0x4000L;
ef79bbde
P		 653
654 //////////////////////////////////////////////
655 // now let us store sound data for reverb
656
6d866bb7 657 if(s_chan[ch].bRVBActive) StoreREVERB(ch,ns,sval);
ef79bbde 658 }
ef79bbde 659 }
ef79bbde
P		 660 }
661 }
662
78c60846 663 // advance "stopped" channels that can cause irqs
664 // (all chans are always playing on the real thing..)
665 if(!bIRQReturn && (spuCtrl&CTRL_IRQ))
666 for(ch=0;ch<MAXCHAN;ch++)
667 {
668 if(dwChannelOn&(1<<ch)) continue; // already handled
669 if(s_chan[ch].pCurr == (unsigned char *)-1)
670 continue;
671 if(s_chan[ch].pCurr > pSpuIrq && s_chan[ch].pLoop > pSpuIrq)
672 continue;
673
674 if(s_chan[ch].iActFreq!=s_chan[ch].iUsedFreq) // new psx frequency?
675 VoiceChangeFrequency(ch);
676
677 s_chan[ch].spos += s_chan[ch].sinc * NSSIZE;
678 while(s_chan[ch].spos >= 28 * 0x10000)
679 {
680 unsigned char *start=s_chan[ch].pCurr;
681 int flags = start[1];
682
683 // Tron Bonne hack, probably wrong (could be wrong memory contents..)
684 if(flags & ~7) flags = 0;
685
686 if(start == pSpuIrq)
687 {
688 do_irq();
689 bIRQReturn = 1;
690 }
691 else if((flags & 1) && start == s_chan[ch].pLoop)
692 {
693 // looping on self
694 s_chan[ch].pCurr=(unsigned char *)-1;
695 break;
696 }
697
698 if((flags&4) && !s_chan[ch].bIgnoreLoop)
699 s_chan[ch].pLoop=start;
700
701 s_chan[ch].pCurr += 16;
702
703 if(flags & 1)
704 s_chan[ch].pCurr = s_chan[ch].pLoop;
705
706 s_chan[ch].spos -= 28 * 0x10000;
707 }
708 }
709
e11ae5c5 710 if(bIRQReturn && iSPUIRQWait) // special return for "spu irq - wait for cpu action"
8680e822 711 {
e11ae5c5 712 iSpuAsyncWait=1;
8680e822 713 bIRQReturn=0;
714 if(iUseTimer!=2)
715 {
716 DWORD dwWatchTime=timeGetTime_spu()+2500;
717
718 while(iSpuAsyncWait && !bEndThread &&
719 timeGetTime_spu()<dwWatchTime)
720 usleep(1000L);
721 continue;
722 }
723 else
724 {
725 return 0;
726 }
727 }
728
729
ef79bbde
P		 730 //---------------------------------------------------//
731 //- here we have another 1 ms of sound data
732 //---------------------------------------------------//
733 // mix XA infos (if any)
734
735 MixXA();
736
737 ///////////////////////////////////////////////////////
738 // mix all channels (including reverb) into one buffer
739
97ea4077 740 for (ns = 0; ns < NSSIZE*2; )
ef79bbde 741 {
97ea4077 742 SSumLR[ns] += MixREVERBLeft(ns/2);
ef79bbde 743
97ea4077 744 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
ef79bbde
P		 745 if (d < -32767) d = -32767; if (d > 32767) d = 32767;
746 *pS++ = d;
97ea4077 747 ns++;
ef79bbde 748
97ea4077 749 SSumLR[ns] += MixREVERBRight();
ef79bbde 750
97ea4077 751 d = SSumLR[ns] / voldiv; SSumLR[ns] = 0;
ef79bbde
P		 752 if(d < -32767) d = -32767; if(d > 32767) d = 32767;
753 *pS++ = d;
97ea4077 754 ns++;
ef79bbde
P		 755 }
756
757 //////////////////////////////////////////////////////
758 // special irq handling in the decode buffers (0x0000-0x1000)
759 // we know:
760 // the decode buffers are located in spu memory in the following way:
761 // 0x0000-0x03ff CD audio left
762 // 0x0400-0x07ff CD audio right
763 // 0x0800-0x0bff Voice 1
764 // 0x0c00-0x0fff Voice 3
765 // and decoded data is 16 bit for one sample
766 // we assume:
767 // even if voices 1/3 are off or no cd audio is playing, the internal
768 // play positions will move on and wrap after 0x400 bytes.
769 // Therefore: we just need a pointer from spumem+0 to spumem+3ff, and
770 // increase this pointer on each sample by 2 bytes. If this pointer
771 // (or 0x400 offsets of this pointer) hits the spuirq address, we generate
772 // an IRQ. Only problem: the "wait for cpu" option is kinda hard to do here
773 // in some of Peops timer modes. So: we ignore this option here (for now).
774
3fc2a4c2 775 if(pMixIrq)
ef79bbde
P		 776 {
777 for(ns=0;ns<NSSIZE;ns++)
778 {
779 if((spuCtrl&0x40) && pSpuIrq && pSpuIrq<spuMemC+0x1000)
780 {
781 for(ch=0;ch<4;ch++)
782 {
783 if(pSpuIrq>=pMixIrq+(ch*0x400) && pSpuIrq<pMixIrq+(ch*0x400)+2)
3fc2a4c2 784 do_irq();
ef79bbde
P		 785 }
786 }
787 pMixIrq+=2;if(pMixIrq>spuMemC+0x3ff) pMixIrq=spuMemC;
788 }
789 }
790
791 InitREVERB();
792
793 // feed the sound
794 // wanna have around 1/60 sec (16.666 ms) updates
795 if (iCycle++ > 16)
796 {
797 SoundFeedStreamData((unsigned char *)pSpuBuffer,
798 ((unsigned char *)pS) - ((unsigned char *)pSpuBuffer));
799 pS = (short *)pSpuBuffer;
800 iCycle = 0;
801 }
802 }
803
804 // end of big main loop...
805
806 bThreadEnded = 1;
807
808 return 0;
809}
810
811// SPU ASYNC... even newer epsxe func
812// 1 time every 'cycle' cycles... harhar
813
814void CALLBACK SPUasync(unsigned long cycle)
815{
816 if(iSpuAsyncWait)
817 {
818 iSpuAsyncWait++;
17ed0d69 819 if(iSpuAsyncWait<=16) return;
ef79bbde
P		 820 iSpuAsyncWait=0;
821 }
822
823 if(iUseTimer==2) // special mode, only used in Linux by this spu (or if you enable the experimental Windows mode)
824 {
825 if(!bSpuInit) return; // -> no init, no call
826
827 MAINThread(0); // -> linux high-compat mode
17ed0d69 828
829 // abuse iSpuAsyncWait mechanism to reduce calls to above function
830 // to make it do larger chunks
831 // note: doing it less often than once per frame causes skips
832 iSpuAsyncWait=1;
ef79bbde
P		 833 }
834}
835
836// SPU UPDATE... new epsxe func
837// 1 time every 32 hsync lines
838// (312/32)x50 in pal
839// (262/32)x60 in ntsc
840
841// since epsxe 1.5.2 (linux) uses SPUupdate, not SPUasync, I will
842// leave that func in the linux port, until epsxe linux is using
843// the async function as well
844
845void CALLBACK SPUupdate(void)
846{
847 SPUasync(0);
848}
849
850// XA AUDIO
851
852void CALLBACK SPUplayADPCMchannel(xa_decode_t *xap)
853{
854 if(!xap) return;
855 if(!xap->freq) return; // no xa freq ? bye
856
857 FeedXA(xap); // call main XA feeder
858}
859
860// CDDA AUDIO
861void CALLBACK SPUplayCDDAchannel(short *pcm, int nbytes)
862{
863 if (!pcm) return;
864 if (nbytes<=0) return;
865
866 FeedCDDA((unsigned char *)pcm, nbytes);
867}
868
869// SETUPTIMER: init of certain buffers and threads/timers
870void SetupTimer(void)
871{
97ea4077 872 memset(SSumLR,0,sizeof(SSumLR)); // init some mixing buffers
ef79bbde
P		 873 memset(iFMod,0,NSSIZE*sizeof(int));
874 pS=(short *)pSpuBuffer; // setup soundbuffer pointer
875
876 bEndThread=0; // init thread vars
877 bThreadEnded=0;
878 bSpuInit=1; // flag: we are inited
879
880 if(!iUseTimer) // linux: use thread
881 {
882 pthread_create(&thread, NULL, MAINThread, NULL);
883 }
884}
885
886// REMOVETIMER: kill threads/timers
887void RemoveTimer(void)
888{
889 bEndThread=1; // raise flag to end thread
890
891 if(!iUseTimer) // linux tread?
892 {
893 int i=0;
894 while(!bThreadEnded && i<2000) {usleep(1000L);i++;} // -> wait until thread has ended
895 if(thread!=(pthread_t)-1) {pthread_cancel(thread);thread=(pthread_t)-1;} // -> cancel thread anyway
896 }
897
898 bThreadEnded=0; // no more spu is running
899 bSpuInit=0;
900}
901
902// SETUPSTREAMS: init most of the spu buffers
903void SetupStreams(void)
904{
905 int i;
906
907 pSpuBuffer=(unsigned char *)malloc(32768); // alloc mixing buffer
908
909 if(iUseReverb==1) i=88200*2;
910 else i=NSSIZE*2;
911
912 sRVBStart = (int *)malloc(i*4); // alloc reverb buffer
913 memset(sRVBStart,0,i*4);
914 sRVBEnd = sRVBStart + i;
915 sRVBPlay = sRVBStart;
916
917 XAStart = // alloc xa buffer
918 (uint32_t *)malloc(44100 * sizeof(uint32_t));
919 XAEnd = XAStart + 44100;
920 XAPlay = XAStart;
921 XAFeed = XAStart;
922
923 CDDAStart = // alloc cdda buffer
924 (uint32_t *)malloc(16384 * sizeof(uint32_t));
925 CDDAEnd = CDDAStart + 16384;
926 CDDAPlay = CDDAStart;
b8e744ce 927 CDDAFeed = CDDAStart;
ef79bbde
P		 928
929 for(i=0;i<MAXCHAN;i++) // loop sound channels
930 {
931// we don't use mutex sync... not needed, would only
932// slow us down:
933// s_chan[i].hMutex=CreateMutex(NULL,FALSE,NULL);
6d866bb7 934 s_chan[i].ADSRX.SustainLevel = 0xf; // -> init sustain
ef79bbde
P		 935 s_chan[i].pLoop=spuMemC;
936 s_chan[i].pStart=spuMemC;
937 s_chan[i].pCurr=spuMemC;
938 }
939
940 pMixIrq=spuMemC; // enable decoded buffer irqs by setting the address
941}
942
943// REMOVESTREAMS: free most buffer
944void RemoveStreams(void)
945{
946 free(pSpuBuffer); // free mixing buffer
947 pSpuBuffer = NULL;
948 free(sRVBStart); // free reverb buffer
949 sRVBStart = NULL;
950 free(XAStart); // free XA buffer
951 XAStart = NULL;
952 free(CDDAStart); // free CDDA buffer
953 CDDAStart = NULL;
954}
955
956// INIT/EXIT STUFF
957
958// SPUINIT: this func will be called first by the main emu
959long CALLBACK SPUinit(void)
960{
961 spuMemC = (unsigned char *)spuMem; // just small setup
962 memset((void *)&rvb, 0, sizeof(REVERBInfo));
963 InitADSR();
964
965 iVolume = 3;
966 iReverbOff = -1;
967 spuIrq = 0;
968 spuAddr = 0xffffffff;
969 bEndThread = 0;
970 bThreadEnded = 0;
971 spuMemC = (unsigned char *)spuMem;
972 pMixIrq = 0;
973 memset((void *)s_chan, 0, (MAXCHAN + 1) * sizeof(SPUCHAN));
974 pSpuIrq = 0;
cdb31c95 975 //iSPUIRQWait = 0;
ef79bbde
P		 976 lastch = -1;
977
d7296e10 978 //ReadConfigSPU(); // read user stuff
ef79bbde
P		 979 SetupStreams(); // prepare streaming
980
981 return 0;
982}
983
984// SPUOPEN: called by main emu after init
985long CALLBACK SPUopen(void)
986{
987 if (bSPUIsOpen) return 0; // security for some stupid main emus
988
989 SetupSound(); // setup sound (before init!)
990 SetupTimer(); // timer for feeding data
991
992 bSPUIsOpen = 1;
993
994 return PSE_SPU_ERR_SUCCESS;
995}
996
997// SPUCLOSE: called before shutdown
998long CALLBACK SPUclose(void)
999{
1000 if (!bSPUIsOpen) return 0; // some security
1001
1002 bSPUIsOpen = 0; // no more open
1003
1004 RemoveTimer(); // no more feeding
1005 RemoveSound(); // no more sound handling
1006
1007 return 0;
1008}
1009
1010// SPUSHUTDOWN: called by main emu on final exit
1011long CALLBACK SPUshutdown(void)
1012{
1013 SPUclose();
1014 RemoveStreams(); // no more streaming
1015
1016 return 0;
1017}
1018
1019// SPUTEST: we don't test, we are always fine ;)
1020long CALLBACK SPUtest(void)
1021{
1022 return 0;
1023}
1024
1025// SPUCONFIGURE: call config dialog
1026long CALLBACK SPUconfigure(void)
1027{
1028#ifdef _MACOSX
1029 DoConfiguration();
1030#else
ee849648 1031// StartCfgTool("CFG");
ef79bbde
P		 1032#endif
1033 return 0;
1034}
1035
1036// SPUABOUT: show about window
1037void CALLBACK SPUabout(void)
1038{
1039#ifdef _MACOSX
1040 DoAbout();
1041#else
ee849648 1042// StartCfgTool("ABOUT");
ef79bbde
P		 1043#endif
1044}
1045
1046// SETUP CALLBACKS
1047// this functions will be called once,
1048// passes a callback that should be called on SPU-IRQ/cdda volume change
1049void CALLBACK SPUregisterCallback(void (CALLBACK *callback)(void))
1050{
1051 irqCallback = callback;
1052}
1053
1054void CALLBACK SPUregisterCDDAVolume(void (CALLBACK *CDDAVcallback)(unsigned short,unsigned short))
1055{
1056 cddavCallback = CDDAVcallback;
1057}
1058
1059// COMMON PLUGIN INFO FUNCS
e906c010 1060/*
ef79bbde
P		 1061char * CALLBACK PSEgetLibName(void)
1062{
1063 return _(libraryName);
1064}
1065
1066unsigned long CALLBACK PSEgetLibType(void)
1067{
1068 return PSE_LT_SPU;
1069}
1070
1071unsigned long CALLBACK PSEgetLibVersion(void)
1072{
1073 return (1 << 16) | (6 << 8);
1074}
1075
1076char * SPUgetLibInfos(void)
1077{
1078 return _(libraryInfo);
1079}
e906c010 1080*/
6d866bb7 1081
90f1d26c 1082// debug
1083void spu_get_debug_info(int *chans_out, int *fmod_chans_out, int *noise_chans_out)
1084{
1085 int ch = 0, fmod_chans = 0, noise_chans = 0;
1086
1087 for(;ch<MAXCHAN;ch++)
1088 {
1089 if (!(dwChannelOn & (1<<ch)))
1090 continue;
1091 if (s_chan[ch].bFMod == 2)
1092 fmod_chans |= 1 << ch;
1093 if (s_chan[ch].bNoise)
1094 noise_chans |= 1 << ch;
1095 }
1096
1097 *chans_out = dwChannelOn;
1098 *fmod_chans_out = fmod_chans;
1099 *noise_chans_out = noise_chans;
1100}
1101
6d866bb7 1102// vim:shiftwidth=1:expandtab
ARM optimized PCSX fork