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Flip the parameters to aluCart2LUTpos, so it behaves a bit more like atan2
[openal-soft/openal-hmr.git] / Alc / ALu.c
blob69a06cae39a9084134cb2f35f23425970e66fbf8
1 /**
2 * OpenAL cross platform audio library
3 * Copyright (C) 1999-2007 by authors.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
18 * Or go to http://www.gnu.org/copyleft/lgpl.html
19 */
20
21 #include "config.h"
22
23 #include <math.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <ctype.h>
27 #include <assert.h>
28
29 #include "alMain.h"
30 #include "AL/al.h"
31 #include "AL/alc.h"
32 #include "alSource.h"
33 #include "alBuffer.h"
34 #include "alListener.h"
35 #include "alAuxEffectSlot.h"
36 #include "alu.h"
37 #include "bs2b.h"
38
39
40 struct ChanMap {
41 enum Channel channel;
42 ALfloat angle;
43 };
44
45 /* Cone scalar */
46 ALfloat ConeScale = 0.5f;
47
48 /* Localized Z scalar for mono sources */
49 ALfloat ZScale = 1.0f;
50
51
52 static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat w,ALfloat matrix[4][4])
53 {
54 ALfloat temp[4] = {
55 vector[0], vector[1], vector[2], w
56 };
57
58 vector[0] = temp[0]*matrix[0][0] + temp[1]*matrix[1][0] + temp[2]*matrix[2][0] + temp[3]*matrix[3][0];
59 vector[1] = temp[0]*matrix[0][1] + temp[1]*matrix[1][1] + temp[2]*matrix[2][1] + temp[3]*matrix[3][1];
60 vector[2] = temp[0]*matrix[0][2] + temp[1]*matrix[1][2] + temp[2]*matrix[2][2] + temp[3]*matrix[3][2];
61 }
62
63
64 ALvoid CalcNonAttnSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
65 {
66 static const struct ChanMap MonoMap[1] = { { FRONT_CENTER, 0.0f } };
67 static const struct ChanMap StereoMap[2] = {
68 { FRONT_LEFT, -30.0f * F_PI/180.0f },
69 { FRONT_RIGHT, 30.0f * F_PI/180.0f }
70 };
71 static const struct ChanMap RearMap[2] = {
72 { BACK_LEFT, -150.0f * F_PI/180.0f },
73 { BACK_RIGHT, 150.0f * F_PI/180.0f }
74 };
75 static const struct ChanMap QuadMap[4] = {
76 { FRONT_LEFT, -45.0f * F_PI/180.0f },
77 { FRONT_RIGHT, 45.0f * F_PI/180.0f },
78 { BACK_LEFT, -135.0f * F_PI/180.0f },
79 { BACK_RIGHT, 135.0f * F_PI/180.0f }
80 };
81 static const struct ChanMap X51Map[6] = {
82 { FRONT_LEFT, -30.0f * F_PI/180.0f },
83 { FRONT_RIGHT, 30.0f * F_PI/180.0f },
84 { FRONT_CENTER, 0.0f * F_PI/180.0f },
85 { LFE, 0.0f },
86 { BACK_LEFT, -110.0f * F_PI/180.0f },
87 { BACK_RIGHT, 110.0f * F_PI/180.0f }
88 };
89 static const struct ChanMap X61Map[7] = {
90 { FRONT_LEFT, -30.0f * F_PI/180.0f },
91 { FRONT_RIGHT, 30.0f * F_PI/180.0f },
92 { FRONT_CENTER, 0.0f * F_PI/180.0f },
93 { LFE, 0.0f },
94 { BACK_CENTER, 180.0f * F_PI/180.0f },
95 { SIDE_LEFT, -90.0f * F_PI/180.0f },
96 { SIDE_RIGHT, 90.0f * F_PI/180.0f }
97 };
98 static const struct ChanMap X71Map[8] = {
99 { FRONT_LEFT, -30.0f * F_PI/180.0f },
100 { FRONT_RIGHT, 30.0f * F_PI/180.0f },
101 { FRONT_CENTER, 0.0f * F_PI/180.0f },
102 { LFE, 0.0f },
103 { BACK_LEFT, -150.0f * F_PI/180.0f },
104 { BACK_RIGHT, 150.0f * F_PI/180.0f },
105 { SIDE_LEFT, -90.0f * F_PI/180.0f },
106 { SIDE_RIGHT, 90.0f * F_PI/180.0f }
107 };
108
109 ALCdevice *Device = ALContext->Device;
110 ALfloat SourceVolume,ListenerGain,MinVolume,MaxVolume;
111 ALbufferlistitem *BufferListItem;
112 enum FmtChannels Channels;
113 ALfloat (*SrcMatrix)[MAXCHANNELS];
114 ALfloat DryGain, DryGainHF;
115 ALfloat WetGain[MAX_SENDS];
116 ALfloat WetGainHF[MAX_SENDS];
117 ALint NumSends, Frequency;
118 const ALfloat *ChannelGain;
119 const struct ChanMap *chans = NULL;
120 enum Resampler Resampler;
121 ALint num_channels = 0;
122 ALboolean DirectChannels;
123 ALfloat Pitch;
124 ALfloat cw;
125 ALuint pos;
126 ALint i, c;
127
128 /* Get device properties */
129 NumSends = Device->NumAuxSends;
130 Frequency = Device->Frequency;
131
132 /* Get listener properties */
133 ListenerGain = ALContext->Listener.Gain;
134
135 /* Get source properties */
136 SourceVolume = ALSource->Gain;
137 MinVolume = ALSource->MinGain;
138 MaxVolume = ALSource->MaxGain;
139 Pitch = ALSource->Pitch;
140 Resampler = ALSource->Resampler;
141 DirectChannels = ALSource->DirectChannels;
142
143 /* Calculate the stepping value */
144 Channels = FmtMono;
145 BufferListItem = ALSource->queue;
146 while(BufferListItem != NULL)
147 {
148 ALbuffer *ALBuffer;
149 if((ALBuffer=BufferListItem->buffer) != NULL)
150 {
151 ALsizei maxstep = STACK_DATA_SIZE/sizeof(ALfloat) /
152 ALSource->NumChannels;
153 maxstep -= ResamplerPadding[Resampler] +
154 ResamplerPrePadding[Resampler] + 1;
155 maxstep = mini(maxstep, INT_MAX>>FRACTIONBITS);
156
157 Pitch = Pitch * ALBuffer->Frequency / Frequency;
158 if(Pitch > (ALfloat)maxstep)
159 ALSource->Params.Step = maxstep<<FRACTIONBITS;
160 else
161 {
162 ALSource->Params.Step = fastf2i(Pitch*FRACTIONONE);
163 if(ALSource->Params.Step == 0)
164 ALSource->Params.Step = 1;
165 }
166 if(ALSource->Params.Step == FRACTIONONE)
167 Resampler = PointResampler;
168
169 Channels = ALBuffer->FmtChannels;
170 break;
171 }
172 BufferListItem = BufferListItem->next;
173 }
174 if(!DirectChannels && Device->Hrtf)
175 ALSource->Params.DryMix = SelectHrtfMixer(Resampler);
176 else
177 ALSource->Params.DryMix = SelectDirectMixer(Resampler);
178 ALSource->Params.WetMix = SelectSendMixer(Resampler);
179
180 /* Calculate gains */
181 DryGain = clampf(SourceVolume, MinVolume, MaxVolume);
182 DryGain *= ALSource->DirectGain * ListenerGain;
183 DryGainHF = ALSource->DirectGainHF;
184 for(i = 0;i < NumSends;i++)
185 {
186 WetGain[i] = clampf(SourceVolume, MinVolume, MaxVolume);
187 WetGain[i] *= ALSource->Send[i].Gain * ListenerGain;
188 WetGainHF[i] = ALSource->Send[i].GainHF;
189 }
190
191 SrcMatrix = ALSource->Params.Direct.Gains;
192 for(i = 0;i < MAXCHANNELS;i++)
193 {
194 for(c = 0;c < MAXCHANNELS;c++)
195 SrcMatrix[i][c] = 0.0f;
196 }
197 switch(Channels)
198 {
199 case FmtMono:
200 chans = MonoMap;
201 num_channels = 1;
202 break;
203 case FmtStereo:
204 if(!DirectChannels && (Device->Flags&DEVICE_DUPLICATE_STEREO))
205 {
206 DryGain *= aluSqrt(2.0f/4.0f);
207 for(c = 0;c < 2;c++)
208 {
209 pos = aluCart2LUTpos(aluSin(RearMap[c].angle),
210 aluCos(RearMap[c].angle));
211 ChannelGain = Device->PanningLUT[pos];
212
213 for(i = 0;i < (ALint)Device->NumChan;i++)
214 {
215 enum Channel chan = Device->Speaker2Chan[i];
216 SrcMatrix[c][chan] += DryGain * ChannelGain[chan];
217 }
218 }
219 }
220 chans = StereoMap;
221 num_channels = 2;
222 break;
223
224 case FmtRear:
225 chans = RearMap;
226 num_channels = 2;
227 break;
228
229 case FmtQuad:
230 chans = QuadMap;
231 num_channels = 4;
232 break;
233
234 case FmtX51:
235 chans = X51Map;
236 num_channels = 6;
237 break;
238
239 case FmtX61:
240 chans = X61Map;
241 num_channels = 7;
242 break;
243
244 case FmtX71:
245 chans = X71Map;
246 num_channels = 8;
247 break;
248 }
249
250 if(DirectChannels != AL_FALSE)
251 {
252 for(c = 0;c < num_channels;c++)
253 {
254 for(i = 0;i < (ALint)Device->NumChan;i++)
255 {
256 enum Channel chan = Device->Speaker2Chan[i];
257 if(chan == chans[c].channel)
258 {
259 SrcMatrix[c][chan] += DryGain;
260 break;
261 }
262 }
263 }
264 }
265 else if(Device->Hrtf)
266 {
267 for(c = 0;c < num_channels;c++)
268 {
269 if(chans[c].channel == LFE)
270 {
271 /* Skip LFE */
272 ALSource->Params.Direct.Hrtf.Delay[c][0] = 0;
273 ALSource->Params.Direct.Hrtf.Delay[c][1] = 0;
274 for(i = 0;i < HRIR_LENGTH;i++)
275 {
276 ALSource->Params.Direct.Hrtf.Coeffs[c][i][0] = 0.0f;
277 ALSource->Params.Direct.Hrtf.Coeffs[c][i][1] = 0.0f;
278 }
279 }
280 else
281 {
282 /* Get the static HRIR coefficients and delays for this
283 * channel. */
284 GetLerpedHrtfCoeffs(Device->Hrtf,
285 0.0f, chans[c].angle, DryGain,
286 ALSource->Params.Direct.Hrtf.Coeffs[c],
287 ALSource->Params.Direct.Hrtf.Delay[c]);
288 }
289 }
290 ALSource->Hrtf.Counter = 0;
291 }
292 else
293 {
294 for(c = 0;c < num_channels;c++)
295 {
296 /* Special-case LFE */
297 if(chans[c].channel == LFE)
298 {
299 SrcMatrix[c][LFE] += DryGain;
300 continue;
301 }
302 pos = aluCart2LUTpos(aluSin(chans[c].angle), aluCos(chans[c].angle));
303 ChannelGain = Device->PanningLUT[pos];
304
305 for(i = 0;i < (ALint)Device->NumChan;i++)
306 {
307 enum Channel chan = Device->Speaker2Chan[i];
308 SrcMatrix[c][chan] += DryGain * ChannelGain[chan];
309 }
310 }
311 }
312 for(i = 0;i < NumSends;i++)
313 {
314 ALeffectslot *Slot = ALSource->Send[i].Slot;
315
316 if(!Slot && i == 0)
317 Slot = Device->DefaultSlot;
318 if(Slot && Slot->effect.type == AL_EFFECT_NULL)
319 Slot = NULL;
320 ALSource->Params.Slot[i] = Slot;
321 ALSource->Params.Send[i].Gain = WetGain[i];
322 }
323
324 /* Update filter coefficients. Calculations based on the I3DL2
325 * spec. */
326 cw = aluCos(F_PI*2.0f * LOWPASSFREQREF / Frequency);
327
328 /* We use two chained one-pole filters, so we need to take the
329 * square root of the squared gain, which is the same as the base
330 * gain. */
331 ALSource->Params.Direct.iirFilter.coeff = lpCoeffCalc(DryGainHF, cw);
332 for(i = 0;i < NumSends;i++)
333 {
334 /* We use a one-pole filter, so we need to take the squared gain */
335 ALfloat a = lpCoeffCalc(WetGainHF[i]*WetGainHF[i], cw);
336 ALSource->Params.Send[i].iirFilter.coeff = a;
337 }
338 }
339
340 ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext)
341 {
342 const ALCdevice *Device = ALContext->Device;
343 ALfloat InnerAngle,OuterAngle,Angle,Distance,ClampedDist;
344 ALfloat Direction[3],Position[3],SourceToListener[3];
345 ALfloat Velocity[3],ListenerVel[3];
346 ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff;
347 ALfloat ConeVolume,ConeHF,SourceVolume,ListenerGain;
348 ALfloat DopplerFactor, SpeedOfSound;
349 ALfloat AirAbsorptionFactor;
350 ALfloat RoomAirAbsorption[MAX_SENDS];
351 ALbufferlistitem *BufferListItem;
352 ALfloat Attenuation;
353 ALfloat RoomAttenuation[MAX_SENDS];
354 ALfloat MetersPerUnit;
355 ALfloat RoomRolloffBase;
356 ALfloat RoomRolloff[MAX_SENDS];
357 ALfloat DecayDistance[MAX_SENDS];
358 ALfloat DryGain;
359 ALfloat DryGainHF;
360 ALboolean DryGainHFAuto;
361 ALfloat WetGain[MAX_SENDS];
362 ALfloat WetGainHF[MAX_SENDS];
363 ALboolean WetGainAuto;
364 ALboolean WetGainHFAuto;
365 enum Resampler Resampler;
366 ALfloat Matrix[4][4];
367 ALfloat Pitch;
368 ALuint Frequency;
369 ALint NumSends;
370 ALfloat cw;
371 ALint i, j;
372
373 DryGainHF = 1.0f;
374 for(i = 0;i < MAX_SENDS;i++)
375 WetGainHF[i] = 1.0f;
376
377 /* Get context/device properties */
378 DopplerFactor = ALContext->DopplerFactor * ALSource->DopplerFactor;
379 SpeedOfSound = ALContext->SpeedOfSound * ALContext->DopplerVelocity;
380 NumSends = Device->NumAuxSends;
381 Frequency = Device->Frequency;
382
383 /* Get listener properties */
384 ListenerGain = ALContext->Listener.Gain;
385 MetersPerUnit = ALContext->Listener.MetersPerUnit;
386 ListenerVel[0] = ALContext->Listener.Velocity[0];
387 ListenerVel[1] = ALContext->Listener.Velocity[1];
388 ListenerVel[2] = ALContext->Listener.Velocity[2];
389 for(i = 0;i < 4;i++)
390 {
391 for(j = 0;j < 4;j++)
392 Matrix[i][j] = ALContext->Listener.Matrix[i][j];
393 }
394
395 /* Get source properties */
396 SourceVolume = ALSource->Gain;
397 MinVolume = ALSource->MinGain;
398 MaxVolume = ALSource->MaxGain;
399 Pitch = ALSource->Pitch;
400 Resampler = ALSource->Resampler;
401 Position[0] = ALSource->Position[0];
402 Position[1] = ALSource->Position[1];
403 Position[2] = ALSource->Position[2];
404 Direction[0] = ALSource->Orientation[0];
405 Direction[1] = ALSource->Orientation[1];
406 Direction[2] = ALSource->Orientation[2];
407 Velocity[0] = ALSource->Velocity[0];
408 Velocity[1] = ALSource->Velocity[1];
409 Velocity[2] = ALSource->Velocity[2];
410 MinDist = ALSource->RefDistance;
411 MaxDist = ALSource->MaxDistance;
412 Rolloff = ALSource->RollOffFactor;
413 InnerAngle = ALSource->InnerAngle * ConeScale;
414 OuterAngle = ALSource->OuterAngle * ConeScale;
415 AirAbsorptionFactor = ALSource->AirAbsorptionFactor;
416 DryGainHFAuto = ALSource->DryGainHFAuto;
417 WetGainAuto = ALSource->WetGainAuto;
418 WetGainHFAuto = ALSource->WetGainHFAuto;
419 RoomRolloffBase = ALSource->RoomRolloffFactor;
420 for(i = 0;i < NumSends;i++)
421 {
422 ALeffectslot *Slot = ALSource->Send[i].Slot;
423
424 if(!Slot && i == 0)
425 Slot = Device->DefaultSlot;
426 if(!Slot || Slot->effect.type == AL_EFFECT_NULL)
427 {
428 Slot = NULL;
429 RoomRolloff[i] = 0.0f;
430 DecayDistance[i] = 0.0f;
431 RoomAirAbsorption[i] = 1.0f;
432 }
433 else if(Slot->AuxSendAuto)
434 {
435 RoomRolloff[i] = RoomRolloffBase;
436 if(IsReverbEffect(Slot->effect.type))
437 {
438 RoomRolloff[i] += Slot->effect.Reverb.RoomRolloffFactor;
439 DecayDistance[i] = Slot->effect.Reverb.DecayTime *
440 SPEEDOFSOUNDMETRESPERSEC;
441 RoomAirAbsorption[i] = Slot->effect.Reverb.AirAbsorptionGainHF;
442 }
443 else
444 {
445 DecayDistance[i] = 0.0f;
446 RoomAirAbsorption[i] = 1.0f;
447 }
448 }
449 else
450 {
451 /* If the slot's auxiliary send auto is off, the data sent to the
452 * effect slot is the same as the dry path, sans filter effects */
453 RoomRolloff[i] = Rolloff;
454 DecayDistance[i] = 0.0f;
455 RoomAirAbsorption[i] = AIRABSORBGAINHF;
456 }
457
458 ALSource->Params.Slot[i] = Slot;
459 }
460
461 /* Transform source to listener space (convert to head relative) */
462 if(ALSource->HeadRelative == AL_FALSE)
463 {
464 /* Translate position */
465 Position[0] -= ALContext->Listener.Position[0];
466 Position[1] -= ALContext->Listener.Position[1];
467 Position[2] -= ALContext->Listener.Position[2];
468
469 /* Transform source vectors */
470 aluMatrixVector(Position, 1.0f, Matrix);
471 aluMatrixVector(Direction, 0.0f, Matrix);
472 aluMatrixVector(Velocity, 0.0f, Matrix);
473 /* Transform listener velocity */
474 aluMatrixVector(ListenerVel, 0.0f, Matrix);
475 }
476 else
477 {
478 /* Transform listener velocity from world space to listener space */
479 aluMatrixVector(ListenerVel, 0.0f, Matrix);
480 /* Offset the source velocity to be relative of the listener velocity */
481 Velocity[0] += ListenerVel[0];
482 Velocity[1] += ListenerVel[1];
483 Velocity[2] += ListenerVel[2];
484 }
485
486 SourceToListener[0] = -Position[0];
487 SourceToListener[1] = -Position[1];
488 SourceToListener[2] = -Position[2];
489 aluNormalize(SourceToListener);
490 aluNormalize(Direction);
491
492 /* Calculate distance attenuation */
493 Distance = aluSqrt(aluDotproduct(Position, Position));
494 ClampedDist = Distance;
495
496 Attenuation = 1.0f;
497 for(i = 0;i < NumSends;i++)
498 RoomAttenuation[i] = 1.0f;
499 switch(ALContext->SourceDistanceModel ? ALSource->DistanceModel :
500 ALContext->DistanceModel)
501 {
502 case InverseDistanceClamped:
503 ClampedDist = clampf(ClampedDist, MinDist, MaxDist);
504 if(MaxDist < MinDist)
505 break;
506 /*fall-through*/
507 case InverseDistance:
508 if(MinDist > 0.0f)
509 {
510 if((MinDist + (Rolloff * (ClampedDist - MinDist))) > 0.0f)
511 Attenuation = MinDist / (MinDist + (Rolloff * (ClampedDist - MinDist)));
512 for(i = 0;i < NumSends;i++)
513 {
514 if((MinDist + (RoomRolloff[i] * (ClampedDist - MinDist))) > 0.0f)
515 RoomAttenuation[i] = MinDist / (MinDist + (RoomRolloff[i] * (ClampedDist - MinDist)));
516 }
517 }
518 break;
519
520 case LinearDistanceClamped:
521 ClampedDist = clampf(ClampedDist, MinDist, MaxDist);
522 if(MaxDist < MinDist)
523 break;
524 /*fall-through*/
525 case LinearDistance:
526 if(MaxDist != MinDist)
527 {
528 Attenuation = 1.0f - (Rolloff*(ClampedDist-MinDist)/(MaxDist - MinDist));
529 Attenuation = maxf(Attenuation, 0.0f);
530 for(i = 0;i < NumSends;i++)
531 {
532 RoomAttenuation[i] = 1.0f - (RoomRolloff[i]*(ClampedDist-MinDist)/(MaxDist - MinDist));
533 RoomAttenuation[i] = maxf(RoomAttenuation[i], 0.0f);
534 }
535 }
536 break;
537
538 case ExponentDistanceClamped:
539 ClampedDist = clampf(ClampedDist, MinDist, MaxDist);
540 if(MaxDist < MinDist)
541 break;
542 /*fall-through*/
543 case ExponentDistance:
544 if(ClampedDist > 0.0f && MinDist > 0.0f)
545 {
546 Attenuation = aluPow(ClampedDist/MinDist, -Rolloff);
547 for(i = 0;i < NumSends;i++)
548 RoomAttenuation[i] = aluPow(ClampedDist/MinDist, -RoomRolloff[i]);
549 }
550 break;
551
552 case DisableDistance:
553 ClampedDist = MinDist;
554 break;
555 }
556
557 /* Source Gain + Attenuation */
558 DryGain = SourceVolume * Attenuation;
559 for(i = 0;i < NumSends;i++)
560 WetGain[i] = SourceVolume * RoomAttenuation[i];
561
562 /* Distance-based air absorption */
563 if(AirAbsorptionFactor > 0.0f && ClampedDist > MinDist)
564 {
565 ALfloat meters = maxf(ClampedDist-MinDist, 0.0f) * MetersPerUnit;
566 DryGainHF *= aluPow(AIRABSORBGAINHF, AirAbsorptionFactor*meters);
567 for(i = 0;i < NumSends;i++)
568 WetGainHF[i] *= aluPow(RoomAirAbsorption[i], AirAbsorptionFactor*meters);
569 }
570
571 if(WetGainAuto)
572 {
573 ALfloat ApparentDist = 1.0f/maxf(Attenuation, 0.00001f) - 1.0f;
574
575 /* Apply a decay-time transformation to the wet path, based on the
576 * attenuation of the dry path.
577 *
578 * Using the apparent distance, based on the distance attenuation, the
579 * initial decay of the reverb effect is calculated and applied to the
580 * wet path.
581 */
582 for(i = 0;i < NumSends;i++)
583 {
584 if(DecayDistance[i] > 0.0f)
585 WetGain[i] *= aluPow(0.001f/*-60dB*/, ApparentDist/DecayDistance[i]);
586 }
587 }
588
589 /* Calculate directional soundcones */
590 Angle = aluAcos(aluDotproduct(Direction,SourceToListener)) * (180.0f/F_PI);
591 if(Angle > InnerAngle && Angle <= OuterAngle)
592 {
593 ALfloat scale = (Angle-InnerAngle) / (OuterAngle-InnerAngle);
594 ConeVolume = lerp(1.0f, ALSource->OuterGain, scale);
595 ConeHF = lerp(1.0f, ALSource->OuterGainHF, scale);
596 }
597 else if(Angle > OuterAngle)
598 {
599 ConeVolume = ALSource->OuterGain;
600 ConeHF = ALSource->OuterGainHF;
601 }
602 else
603 {
604 ConeVolume = 1.0f;
605 ConeHF = 1.0f;
606 }
607
608 DryGain *= ConeVolume;
609 if(WetGainAuto)
610 {
611 for(i = 0;i < NumSends;i++)
612 WetGain[i] *= ConeVolume;
613 }
614 if(DryGainHFAuto)
615 DryGainHF *= ConeHF;
616 if(WetGainHFAuto)
617 {
618 for(i = 0;i < NumSends;i++)
619 WetGainHF[i] *= ConeHF;
620 }
621
622 /* Clamp to Min/Max Gain */
623 DryGain = clampf(DryGain, MinVolume, MaxVolume);
624 for(i = 0;i < NumSends;i++)
625 WetGain[i] = clampf(WetGain[i], MinVolume, MaxVolume);
626
627 /* Apply gain and frequency filters */
628 DryGain *= ALSource->DirectGain * ListenerGain;
629 DryGainHF *= ALSource->DirectGainHF;
630 for(i = 0;i < NumSends;i++)
631 {
632 WetGain[i] *= ALSource->Send[i].Gain * ListenerGain;
633 WetGainHF[i] *= ALSource->Send[i].GainHF;
634 }
635
636 /* Calculate velocity-based doppler effect */
637 if(DopplerFactor > 0.0f)
638 {
639 ALfloat VSS, VLS;
640
641 if(SpeedOfSound < 1.0f)
642 {
643 DopplerFactor *= 1.0f/SpeedOfSound;
644 SpeedOfSound = 1.0f;
645 }
646
647 VSS = aluDotproduct(Velocity, SourceToListener) * DopplerFactor;
648 VLS = aluDotproduct(ListenerVel, SourceToListener) * DopplerFactor;
649
650 Pitch *= clampf(SpeedOfSound-VLS, 1.0f, SpeedOfSound*2.0f - 1.0f) /
651 clampf(SpeedOfSound-VSS, 1.0f, SpeedOfSound*2.0f - 1.0f);
652 }
653
654 BufferListItem = ALSource->queue;
655 while(BufferListItem != NULL)
656 {
657 ALbuffer *ALBuffer;
658 if((ALBuffer=BufferListItem->buffer) != NULL)
659 {
660 /* Calculate fixed-point stepping value, based on the pitch, buffer
661 * frequency, and output frequency. */
662 ALsizei maxstep = STACK_DATA_SIZE/sizeof(ALfloat) /
663 ALSource->NumChannels;
664 maxstep -= ResamplerPadding[Resampler] +
665 ResamplerPrePadding[Resampler] + 1;
666 maxstep = mini(maxstep, INT_MAX>>FRACTIONBITS);
667
668 Pitch = Pitch * ALBuffer->Frequency / Frequency;
669 if(Pitch > (ALfloat)maxstep)
670 ALSource->Params.Step = maxstep<<FRACTIONBITS;
671 else
672 {
673 ALSource->Params.Step = fastf2i(Pitch*FRACTIONONE);
674 if(ALSource->Params.Step == 0)
675 ALSource->Params.Step = 1;
676 }
677 if(ALSource->Params.Step == FRACTIONONE)
678 Resampler = PointResampler;
679
680 break;
681 }
682 BufferListItem = BufferListItem->next;
683 }
684 if(Device->Hrtf)
685 ALSource->Params.DryMix = SelectHrtfMixer(Resampler);
686 else
687 ALSource->Params.DryMix = SelectDirectMixer(Resampler);
688 ALSource->Params.WetMix = SelectSendMixer(Resampler);
689
690 if(Device->Hrtf)
691 {
692 /* Use a binaural HRTF algorithm for stereo headphone playback */
693 ALfloat delta, ev = 0.0f, az = 0.0f;
694
695 if(Distance > 0.0f)
696 {
697 ALfloat invlen = 1.0f/Distance;
698 Position[0] *= invlen;
699 Position[1] *= invlen;
700 Position[2] *= invlen;
701
702 /* Calculate elevation and azimuth only when the source is not at
703 * the listener. This prevents +0 and -0 Z from producing
704 * inconsistent panning. */
705 ev = aluAsin(Position[1]);
706 az = aluAtan2(Position[0], -Position[2]*ZScale);
707 }
708
709 /* Check to see if the HRIR is already moving. */
710 if(ALSource->Hrtf.Moving)
711 {
712 /* Calculate the normalized HRTF transition factor (delta). */
713 delta = CalcHrtfDelta(ALSource->Params.Direct.Hrtf.Gain, DryGain,
714 ALSource->Params.Direct.Hrtf.Dir, Position);
715 /* If the delta is large enough, get the moving HRIR target
716 * coefficients, target delays, steppping values, and counter. */
717 if(delta > 0.001f)
718 {
719 ALSource->Hrtf.Counter = GetMovingHrtfCoeffs(Device->Hrtf,
720 ev, az, DryGain, delta,
721 ALSource->Hrtf.Counter,
722 ALSource->Params.Direct.Hrtf.Coeffs[0],
723 ALSource->Params.Direct.Hrtf.Delay[0],
724 ALSource->Params.Direct.Hrtf.CoeffStep,
725 ALSource->Params.Direct.Hrtf.DelayStep);
726 ALSource->Params.Direct.Hrtf.Gain = DryGain;
727 ALSource->Params.Direct.Hrtf.Dir[0] = Position[0];
728 ALSource->Params.Direct.Hrtf.Dir[1] = Position[1];
729 ALSource->Params.Direct.Hrtf.Dir[2] = Position[2];
730 }
731 }
732 else
733 {
734 /* Get the initial (static) HRIR coefficients and delays. */
735 GetLerpedHrtfCoeffs(Device->Hrtf, ev, az, DryGain,
736 ALSource->Params.Direct.Hrtf.Coeffs[0],
737 ALSource->Params.Direct.Hrtf.Delay[0]);
738 ALSource->Hrtf.Counter = 0;
739 ALSource->Params.Direct.Hrtf.Gain = DryGain;
740 ALSource->Params.Direct.Hrtf.Dir[0] = Position[0];
741 ALSource->Params.Direct.Hrtf.Dir[1] = Position[1];
742 ALSource->Params.Direct.Hrtf.Dir[2] = Position[2];
743 }
744 }
745 else
746 {
747 /* Use a lookup table for panning multi-speaker playback. */
748 ALfloat DirGain, AmbientGain;
749 const ALfloat *ChannelGain;
750 ALfloat length;
751 ALint pos;
752
753 /* Normalize the length based on the source's min distance. Sources
754 * closer than this will not pan as much. */
755 length = maxf(Distance, MinDist);
756 if(length > 0.0f)
757 {
758 ALfloat invlen = 1.0f/length;
759 Position[0] *= invlen;
760 Position[1] *= invlen;
761 Position[2] *= invlen;
762 }
763
764 pos = aluCart2LUTpos(Position[0], -Position[2]*ZScale);
765 ChannelGain = Device->PanningLUT[pos];
766
767 /* Adjustment for partial panning. Not the greatest, but simple
768 * enough. */
769 DirGain = aluSqrt(Position[0]*Position[0] + Position[2]*Position[2]);
770 AmbientGain = aluSqrt(1.0f/Device->NumChan);
771 for(i = 0;i < MAXCHANNELS;i++)
772 {
773 for(j = 0;j < MAXCHANNELS;j++)
774 ALSource->Params.Direct.Gains[i][j] = 0.0f;
775 }
776 for(i = 0;i < (ALint)Device->NumChan;i++)
777 {
778 enum Channel chan = Device->Speaker2Chan[i];
779 ALfloat gain = lerp(AmbientGain, ChannelGain[chan], DirGain);
780 ALSource->Params.Direct.Gains[0][chan] = DryGain * gain;
781 }
782 }
783 for(i = 0;i < NumSends;i++)
784 ALSource->Params.Send[i].Gain = WetGain[i];
785
786 /* Update filter coefficients. */
787 cw = aluCos(F_PI*2.0f * LOWPASSFREQREF / Frequency);
788
789 ALSource->Params.Direct.iirFilter.coeff = lpCoeffCalc(DryGainHF, cw);
790 for(i = 0;i < NumSends;i++)
791 {
792 ALfloat a = lpCoeffCalc(WetGainHF[i]*WetGainHF[i], cw);
793 ALSource->Params.Send[i].iirFilter.coeff = a;
794 }
795 }
796
797
798 static __inline ALfloat aluF2F(ALfloat val)
799 { return val; }
800 static __inline ALint aluF2I(ALfloat val)
801 {
802 if(val > 1.0f) return 2147483647;
803 if(val < -1.0f) return -2147483647-1;
804 return fastf2i((ALfloat)(val*2147483647.0));
805 }
806 static __inline ALuint aluF2UI(ALfloat val)
807 { return aluF2I(val)+2147483648u; }
808 static __inline ALshort aluF2S(ALfloat val)
809 { return aluF2I(val)>>16; }
810 static __inline ALushort aluF2US(ALfloat val)
811 { return aluF2S(val)+32768; }
812 static __inline ALbyte aluF2B(ALfloat val)
813 { return aluF2I(val)>>24; }
814 static __inline ALubyte aluF2UB(ALfloat val)
815 { return aluF2B(val)+128; }
816
817 #define DECL_TEMPLATE(T, N, func) \
818 static void Write_##T##_##N(ALCdevice *device, T *RESTRICT buffer, \
819 ALuint SamplesToDo) \
820 { \
821 ALfloat (*RESTRICT DryBuffer)[MAXCHANNELS] = device->DryBuffer; \
822 const enum Channel *ChanMap = device->DevChannels; \
823 ALuint i, j; \
824 \
825 for(j = 0;j < N;j++) \
826 { \
827 T *RESTRICT out = buffer + j; \
828 enum Channel chan = ChanMap[j]; \
829 \
830 for(i = 0;i < SamplesToDo;i++) \
831 out[i*N] = func(DryBuffer[i][chan]); \
832 } \
833 }
834
835 DECL_TEMPLATE(ALfloat, 1, aluF2F)
836 DECL_TEMPLATE(ALfloat, 2, aluF2F)
837 DECL_TEMPLATE(ALfloat, 4, aluF2F)
838 DECL_TEMPLATE(ALfloat, 6, aluF2F)
839 DECL_TEMPLATE(ALfloat, 7, aluF2F)
840 DECL_TEMPLATE(ALfloat, 8, aluF2F)
841
842 DECL_TEMPLATE(ALuint, 1, aluF2UI)
843 DECL_TEMPLATE(ALuint, 2, aluF2UI)
844 DECL_TEMPLATE(ALuint, 4, aluF2UI)
845 DECL_TEMPLATE(ALuint, 6, aluF2UI)
846 DECL_TEMPLATE(ALuint, 7, aluF2UI)
847 DECL_TEMPLATE(ALuint, 8, aluF2UI)
848
849 DECL_TEMPLATE(ALint, 1, aluF2I)
850 DECL_TEMPLATE(ALint, 2, aluF2I)
851 DECL_TEMPLATE(ALint, 4, aluF2I)
852 DECL_TEMPLATE(ALint, 6, aluF2I)
853 DECL_TEMPLATE(ALint, 7, aluF2I)
854 DECL_TEMPLATE(ALint, 8, aluF2I)
855
856 DECL_TEMPLATE(ALushort, 1, aluF2US)
857 DECL_TEMPLATE(ALushort, 2, aluF2US)
858 DECL_TEMPLATE(ALushort, 4, aluF2US)
859 DECL_TEMPLATE(ALushort, 6, aluF2US)
860 DECL_TEMPLATE(ALushort, 7, aluF2US)
861 DECL_TEMPLATE(ALushort, 8, aluF2US)
862
863 DECL_TEMPLATE(ALshort, 1, aluF2S)
864 DECL_TEMPLATE(ALshort, 2, aluF2S)
865 DECL_TEMPLATE(ALshort, 4, aluF2S)
866 DECL_TEMPLATE(ALshort, 6, aluF2S)
867 DECL_TEMPLATE(ALshort, 7, aluF2S)
868 DECL_TEMPLATE(ALshort, 8, aluF2S)
869
870 DECL_TEMPLATE(ALubyte, 1, aluF2UB)
871 DECL_TEMPLATE(ALubyte, 2, aluF2UB)
872 DECL_TEMPLATE(ALubyte, 4, aluF2UB)
873 DECL_TEMPLATE(ALubyte, 6, aluF2UB)
874 DECL_TEMPLATE(ALubyte, 7, aluF2UB)
875 DECL_TEMPLATE(ALubyte, 8, aluF2UB)
876
877 DECL_TEMPLATE(ALbyte, 1, aluF2B)
878 DECL_TEMPLATE(ALbyte, 2, aluF2B)
879 DECL_TEMPLATE(ALbyte, 4, aluF2B)
880 DECL_TEMPLATE(ALbyte, 6, aluF2B)
881 DECL_TEMPLATE(ALbyte, 7, aluF2B)
882 DECL_TEMPLATE(ALbyte, 8, aluF2B)
883
884 #undef DECL_TEMPLATE
885
886 #define DECL_TEMPLATE(T) \
887 static void Write_##T(ALCdevice *device, T *buffer, ALuint SamplesToDo) \
888 { \
889 switch(device->FmtChans) \
890 { \
891 case DevFmtMono: \
892 Write_##T##_1(device, buffer, SamplesToDo); \
893 break; \
894 case DevFmtStereo: \
895 Write_##T##_2(device, buffer, SamplesToDo); \
896 break; \
897 case DevFmtQuad: \
898 Write_##T##_4(device, buffer, SamplesToDo); \
899 break; \
900 case DevFmtX51: \
901 case DevFmtX51Side: \
902 Write_##T##_6(device, buffer, SamplesToDo); \
903 break; \
904 case DevFmtX61: \
905 Write_##T##_7(device, buffer, SamplesToDo); \
906 break; \
907 case DevFmtX71: \
908 Write_##T##_8(device, buffer, SamplesToDo); \
909 break; \
910 } \
911 }
912
913 DECL_TEMPLATE(ALfloat)
914 DECL_TEMPLATE(ALuint)
915 DECL_TEMPLATE(ALint)
916 DECL_TEMPLATE(ALushort)
917 DECL_TEMPLATE(ALshort)
918 DECL_TEMPLATE(ALubyte)
919 DECL_TEMPLATE(ALbyte)
920
921 #undef DECL_TEMPLATE
922
923 ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size)
924 {
925 ALuint SamplesToDo;
926 ALeffectslot **slot, **slot_end;
927 ALsource **src, **src_end;
928 ALCcontext *ctx;
929 int fpuState;
930 ALuint i, c;
931
932 fpuState = SetMixerFPUMode();
933
934 while(size > 0)
935 {
936 SamplesToDo = minu(size, BUFFERSIZE);
937 memset(device->DryBuffer, 0, SamplesToDo*MAXCHANNELS*sizeof(ALfloat));
938
939 LockDevice(device);
940 ctx = device->ContextList;
941 while(ctx)
942 {
943 ALenum DeferUpdates = ctx->DeferUpdates;
944 ALenum UpdateSources = AL_FALSE;
945
946 if(!DeferUpdates)
947 UpdateSources = ExchangeInt(&ctx->UpdateSources, AL_FALSE);
948
949 /* source processing */
950 src = ctx->ActiveSources;
951 src_end = src + ctx->ActiveSourceCount;
952 while(src != src_end)
953 {
954 if((*src)->state != AL_PLAYING)
955 {
956 --(ctx->ActiveSourceCount);
957 *src = *(--src_end);
958 continue;
959 }
960
961 if(!DeferUpdates && (ExchangeInt(&(*src)->NeedsUpdate, AL_FALSE) ||
962 UpdateSources))
963 ALsource_Update(*src, ctx);
964
965 MixSource(*src, device, SamplesToDo);
966 src++;
967 }
968
969 /* effect slot processing */
970 slot = ctx->ActiveEffectSlots;
971 slot_end = slot + ctx->ActiveEffectSlotCount;
972 while(slot != slot_end)
973 {
974 for(c = 0;c < SamplesToDo;c++)
975 {
976 (*slot)->WetBuffer[c] += (*slot)->ClickRemoval[0];
977 (*slot)->ClickRemoval[0] -= (*slot)->ClickRemoval[0] * (1.0f/256.0f);
978 }
979 (*slot)->ClickRemoval[0] += (*slot)->PendingClicks[0];
980 (*slot)->PendingClicks[0] = 0.0f;
981
982 if(!DeferUpdates && ExchangeInt(&(*slot)->NeedsUpdate, AL_FALSE))
983 ALeffectState_Update((*slot)->EffectState, device, *slot);
984
985 ALeffectState_Process((*slot)->EffectState, SamplesToDo,
986 (*slot)->WetBuffer, device->DryBuffer);
987
988 for(i = 0;i < SamplesToDo;i++)
989 (*slot)->WetBuffer[i] = 0.0f;
990
991 slot++;
992 }
993
994 ctx = ctx->next;
995 }
996
997 slot = &device->DefaultSlot;
998 if(*slot != NULL)
999 {
1000 for(c = 0;c < SamplesToDo;c++)
1001 {
1002 (*slot)->WetBuffer[c] += (*slot)->ClickRemoval[0];
1003 (*slot)->ClickRemoval[0] -= (*slot)->ClickRemoval[0] * (1.0f/256.0f);
1004 }
1005 (*slot)->ClickRemoval[0] += (*slot)->PendingClicks[0];
1006 (*slot)->PendingClicks[0] = 0.0f;
1007
1008 if(ExchangeInt(&(*slot)->NeedsUpdate, AL_FALSE))
1009 ALeffectState_Update((*slot)->EffectState, device, *slot);
1010
1011 ALeffectState_Process((*slot)->EffectState, SamplesToDo,
1012 (*slot)->WetBuffer, device->DryBuffer);
1013
1014 for(i = 0;i < SamplesToDo;i++)
1015 (*slot)->WetBuffer[i] = 0.0f;
1016 }
1017 UnlockDevice(device);
1018
1019 /* Click-removal. Could do better; this only really handles immediate
1020 * changes between updates where a predictive sample could be
1021 * generated. Delays caused by effects and HRTF aren't caught. */
1022 if(device->FmtChans == DevFmtMono)
1023 {
1024 for(i = 0;i < SamplesToDo;i++)
1025 {
1026 device->DryBuffer[i][FRONT_CENTER] += device->ClickRemoval[FRONT_CENTER];
1027 device->ClickRemoval[FRONT_CENTER] -= device->ClickRemoval[FRONT_CENTER] * (1.0f/256.0f);
1028 }
1029 device->ClickRemoval[FRONT_CENTER] += device->PendingClicks[FRONT_CENTER];
1030 device->PendingClicks[FRONT_CENTER] = 0.0f;
1031 }
1032 else if(device->FmtChans == DevFmtStereo)
1033 {
1034 /* Assumes the first two channels are FRONT_LEFT and FRONT_RIGHT */
1035 for(i = 0;i < SamplesToDo;i++)
1036 {
1037 for(c = 0;c < 2;c++)
1038 {
1039 device->DryBuffer[i][c] += device->ClickRemoval[c];
1040 device->ClickRemoval[c] -= device->ClickRemoval[c] * (1.0f/256.0f);
1041 }
1042 }
1043 for(c = 0;c < 2;c++)
1044 {
1045 device->ClickRemoval[c] += device->PendingClicks[c];
1046 device->PendingClicks[c] = 0.0f;
1047 }
1048 if(device->Bs2b)
1049 {
1050 for(i = 0;i < SamplesToDo;i++)
1051 bs2b_cross_feed(device->Bs2b, &device->DryBuffer[i][0]);
1052 }
1053 }
1054 else
1055 {
1056 for(i = 0;i < SamplesToDo;i++)
1057 {
1058 for(c = 0;c < MAXCHANNELS;c++)
1059 {
1060 device->DryBuffer[i][c] += device->ClickRemoval[c];
1061 device->ClickRemoval[c] -= device->ClickRemoval[c] * (1.0f/256.0f);
1062 }
1063 }
1064 for(c = 0;c < MAXCHANNELS;c++)
1065 {
1066 device->ClickRemoval[c] += device->PendingClicks[c];
1067 device->PendingClicks[c] = 0.0f;
1068 }
1069 }
1070
1071 if(buffer)
1072 {
1073 switch(device->FmtType)
1074 {
1075 case DevFmtByte:
1076 Write_ALbyte(device, buffer, SamplesToDo);
1077 break;
1078 case DevFmtUByte:
1079 Write_ALubyte(device, buffer, SamplesToDo);
1080 break;
1081 case DevFmtShort:
1082 Write_ALshort(device, buffer, SamplesToDo);
1083 break;
1084 case DevFmtUShort:
1085 Write_ALushort(device, buffer, SamplesToDo);
1086 break;
1087 case DevFmtInt:
1088 Write_ALint(device, buffer, SamplesToDo);
1089 break;
1090 case DevFmtUInt:
1091 Write_ALuint(device, buffer, SamplesToDo);
1092 break;
1093 case DevFmtFloat:
1094 Write_ALfloat(device, buffer, SamplesToDo);
1095 break;
1096 }
1097 }
1098
1099 size -= SamplesToDo;
1100 }
1101
1102 RestoreFPUMode(fpuState);
1103 }
1104
1105
1106 ALvoid aluHandleDisconnect(ALCdevice *device)
1107 {
1108 ALCcontext *Context;
1109
1110 LockDevice(device);
1111 device->Connected = ALC_FALSE;
1112
1113 Context = device->ContextList;
1114 while(Context)
1115 {
1116 ALsource **src, **src_end;
1117
1118 src = Context->ActiveSources;
1119 src_end = src + Context->ActiveSourceCount;
1120 while(src != src_end)
1121 {
1122 if((*src)->state == AL_PLAYING)
1123 {
1124 (*src)->state = AL_STOPPED;
1125 (*src)->BuffersPlayed = (*src)->BuffersInQueue;
1126 (*src)->position = 0;
1127 (*src)->position_fraction = 0;
1128 }
1129 src++;
1130 }
1131 Context->ActiveSourceCount = 0;
1132
1133 Context = Context->next;
1134 }
1135 UnlockDevice(device);
1136 }
fork of openal-soft for dark-hammer project