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.
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.
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
21 #define _CRT_SECURE_NO_DEPRECATE // get rid of sprintf security warnings on VS2005
37 #include "alListener.h"
38 #include "alAuxEffectSlot.h"
43 #if defined (HAVE_FLOAT_H)
48 #define M_PI 3.14159265358979323846 /* pi */
49 #define M_PI_2 1.57079632679489661923 /* pi/2 */
52 #if defined(HAVE_STDINT_H)
54 typedef int64_t ALint64
;
55 #elif defined(HAVE___INT64)
56 typedef __int64 ALint64
;
57 #elif (SIZEOF_LONG == 8)
59 #elif (SIZEOF_LONG_LONG == 8)
60 typedef long long ALint64
;
64 #define aluSqrt(x) ((ALfloat)sqrtf((float)(x)))
66 #define aluSqrt(x) ((ALfloat)sqrt((double)(x)))
70 #define aluAcos(x) ((ALfloat)acosf((float)(x)))
72 #define aluAcos(x) ((ALfloat)acos((double)(x)))
76 #define aluAtan(x) ((ALfloat)atanf((float)(x)))
78 #define aluAtan(x) ((ALfloat)atan((double)(x)))
82 #define aluFabs(x) ((ALfloat)fabsf((float)(x)))
84 #define aluFabs(x) ((ALfloat)fabs((double)(x)))
88 #if defined(max) && !defined(__max)
91 #if defined(min) && !defined(__min)
95 #define BUFFERSIZE 24000
96 #define FRACTIONBITS 14
97 #define FRACTIONMASK ((1L<<FRACTIONBITS)-1)
98 #define MAX_PITCH 65536
100 /* Minimum ramp length in milliseconds. The value below was chosen to
101 * adequately reduce clicks and pops from harsh gain changes. */
102 #define MIN_RAMP_LENGTH 16
104 ALboolean DuplicateStereo
= AL_FALSE
;
106 /* NOTE: The AL_FORMAT_REAR* enums aren't handled here be cause they're
107 * converted to AL_FORMAT_QUAD* when loaded */
108 __inline ALuint
aluBytesFromFormat(ALenum format
)
112 case AL_FORMAT_MONO8
:
113 case AL_FORMAT_STEREO8
:
114 case AL_FORMAT_QUAD8_LOKI
:
115 case AL_FORMAT_QUAD8
:
116 case AL_FORMAT_51CHN8
:
117 case AL_FORMAT_61CHN8
:
118 case AL_FORMAT_71CHN8
:
121 case AL_FORMAT_MONO16
:
122 case AL_FORMAT_STEREO16
:
123 case AL_FORMAT_QUAD16_LOKI
:
124 case AL_FORMAT_QUAD16
:
125 case AL_FORMAT_51CHN16
:
126 case AL_FORMAT_61CHN16
:
127 case AL_FORMAT_71CHN16
:
130 case AL_FORMAT_MONO_FLOAT32
:
131 case AL_FORMAT_STEREO_FLOAT32
:
132 case AL_FORMAT_QUAD32
:
133 case AL_FORMAT_51CHN32
:
134 case AL_FORMAT_61CHN32
:
135 case AL_FORMAT_71CHN32
:
143 __inline ALuint
aluChannelsFromFormat(ALenum format
)
147 case AL_FORMAT_MONO8
:
148 case AL_FORMAT_MONO16
:
149 case AL_FORMAT_MONO_FLOAT32
:
152 case AL_FORMAT_STEREO8
:
153 case AL_FORMAT_STEREO16
:
154 case AL_FORMAT_STEREO_FLOAT32
:
157 case AL_FORMAT_QUAD8_LOKI
:
158 case AL_FORMAT_QUAD16_LOKI
:
159 case AL_FORMAT_QUAD8
:
160 case AL_FORMAT_QUAD16
:
161 case AL_FORMAT_QUAD32
:
164 case AL_FORMAT_51CHN8
:
165 case AL_FORMAT_51CHN16
:
166 case AL_FORMAT_51CHN32
:
169 case AL_FORMAT_61CHN8
:
170 case AL_FORMAT_61CHN16
:
171 case AL_FORMAT_61CHN32
:
174 case AL_FORMAT_71CHN8
:
175 case AL_FORMAT_71CHN16
:
176 case AL_FORMAT_71CHN32
:
185 static __inline ALfloat
lpFilter(FILTER
*iir
, ALfloat input
)
187 ALfloat
*history
= iir
->history
;
188 ALfloat a
= iir
->coeff
;
189 ALfloat output
= input
;
191 output
= output
+ (history
[0]-output
)*a
;
193 output
= output
+ (history
[1]-output
)*a
;
195 output
= output
+ (history
[2]-output
)*a
;
197 output
= output
+ (history
[3]-output
)*a
;
203 static __inline ALfloat
lpFilterMC(FILTER
*iir
, ALuint chan
, ALfloat input
)
205 ALfloat
*history
= &iir
->history
[chan
*2];
206 ALfloat a
= iir
->coeff
;
207 ALfloat output
= input
;
209 output
= output
+ (history
[0]-output
)*a
;
211 output
= output
+ (history
[1]-output
)*a
;
218 static __inline ALshort
aluF2S(ALfloat Value
)
223 i
= __min( 32767, i
);
224 i
= __max(-32768, i
);
228 static __inline ALvoid
aluCrossproduct(ALfloat
*inVector1
,ALfloat
*inVector2
,ALfloat
*outVector
)
230 outVector
[0] = inVector1
[1]*inVector2
[2] - inVector1
[2]*inVector2
[1];
231 outVector
[1] = inVector1
[2]*inVector2
[0] - inVector1
[0]*inVector2
[2];
232 outVector
[2] = inVector1
[0]*inVector2
[1] - inVector1
[1]*inVector2
[0];
235 static __inline ALfloat
aluDotproduct(ALfloat
*inVector1
,ALfloat
*inVector2
)
237 return inVector1
[0]*inVector2
[0] + inVector1
[1]*inVector2
[1] +
238 inVector1
[2]*inVector2
[2];
241 static __inline ALvoid
aluNormalize(ALfloat
*inVector
)
243 ALfloat length
, inverse_length
;
245 length
= aluSqrt(aluDotproduct(inVector
, inVector
));
248 inverse_length
= 1.0f
/length
;
249 inVector
[0] *= inverse_length
;
250 inVector
[1] *= inverse_length
;
251 inVector
[2] *= inverse_length
;
255 static __inline ALvoid
aluMatrixVector(ALfloat
*vector
,ALfloat matrix
[3][3])
259 result
[0] = vector
[0]*matrix
[0][0] + vector
[1]*matrix
[1][0] + vector
[2]*matrix
[2][0];
260 result
[1] = vector
[0]*matrix
[0][1] + vector
[1]*matrix
[1][1] + vector
[2]*matrix
[2][1];
261 result
[2] = vector
[0]*matrix
[0][2] + vector
[1]*matrix
[1][2] + vector
[2]*matrix
[2][2];
262 memcpy(vector
, result
, sizeof(result
));
265 static ALvoid
SetSpeakerArrangement(const char *name
, ALfloat SpeakerAngle
[OUTPUTCHANNELS
],
266 ALint Speaker2Chan
[OUTPUTCHANNELS
], ALint chans
)
274 confkey
= GetConfigValue(NULL
, name
, "");
279 next
= strchr(confkey
, ',');
284 } while(isspace(*next
));
287 sep
= strchr(confkey
, '=');
288 if(!sep
|| confkey
== sep
)
292 while(isspace(*end
) && end
!= confkey
)
295 if(strncmp(confkey
, "fl", end
-confkey
) == 0)
297 else if(strncmp(confkey
, "fr", end
-confkey
) == 0)
299 else if(strncmp(confkey
, "fc", end
-confkey
) == 0)
301 else if(strncmp(confkey
, "bl", end
-confkey
) == 0)
303 else if(strncmp(confkey
, "br", end
-confkey
) == 0)
305 else if(strncmp(confkey
, "bc", end
-confkey
) == 0)
307 else if(strncmp(confkey
, "sl", end
-confkey
) == 0)
309 else if(strncmp(confkey
, "sr", end
-confkey
) == 0)
313 AL_PRINT("Unknown speaker for %s: \"%c%c\"\n", name
, confkey
[0], confkey
[1]);
321 for(i
= 0;i
< chans
;i
++)
323 if(Speaker2Chan
[i
] == val
)
325 val
= strtol(sep
, NULL
, 10);
326 if(val
>= -180 && val
<= 180)
327 SpeakerAngle
[i
] = val
* M_PI
/180.0f
;
329 AL_PRINT("Invalid angle for speaker \"%c%c\": %d\n", confkey
[0], confkey
[1], val
);
335 for(i
= 1;i
< chans
;i
++)
337 if(SpeakerAngle
[i
] <= SpeakerAngle
[i
-1])
339 AL_PRINT("Speaker %d of %d does not follow previous: %f > %f\n", i
, chans
,
340 SpeakerAngle
[i
-1] * 180.0f
/M_PI
, SpeakerAngle
[i
] * 180.0f
/M_PI
);
341 SpeakerAngle
[i
] = SpeakerAngle
[i
-1] + 1 * 180.0f
/M_PI
;
346 static __inline ALfloat
aluLUTpos2Angle(ALint pos
)
348 if(pos
< QUADRANT_NUM
)
349 return aluAtan((ALfloat
)pos
/ (ALfloat
)(QUADRANT_NUM
- pos
));
350 if(pos
< 2 * QUADRANT_NUM
)
351 return M_PI_2
+ aluAtan((ALfloat
)(pos
- QUADRANT_NUM
) / (ALfloat
)(2 * QUADRANT_NUM
- pos
));
352 if(pos
< 3 * QUADRANT_NUM
)
353 return aluAtan((ALfloat
)(pos
- 2 * QUADRANT_NUM
) / (ALfloat
)(3 * QUADRANT_NUM
- pos
)) - M_PI
;
354 return aluAtan((ALfloat
)(pos
- 3 * QUADRANT_NUM
) / (ALfloat
)(4 * QUADRANT_NUM
- pos
)) - M_PI_2
;
357 ALvoid
aluInitPanning(ALCcontext
*Context
)
359 ALint pos
, offset
, s
;
360 ALfloat Alpha
, Theta
;
361 ALfloat SpeakerAngle
[OUTPUTCHANNELS
];
362 ALint Speaker2Chan
[OUTPUTCHANNELS
];
364 for(s
= 0;s
< OUTPUTCHANNELS
;s
++)
367 for(s2
= 0;s2
< OUTPUTCHANNELS
;s2
++)
368 Context
->ChannelMatrix
[s
][s2
] = ((s
==s2
) ? 1.0f
: 0.0f
);
371 switch(Context
->Device
->Format
)
373 /* Mono is rendered as stereo, then downmixed during post-process */
374 case AL_FORMAT_MONO8
:
375 case AL_FORMAT_MONO16
:
376 case AL_FORMAT_MONO_FLOAT32
:
377 Context
->ChannelMatrix
[FRONT_CENTER
][FRONT_LEFT
] = aluSqrt(0.5);
378 Context
->ChannelMatrix
[FRONT_CENTER
][FRONT_RIGHT
] = aluSqrt(0.5);
379 Context
->ChannelMatrix
[SIDE_LEFT
][FRONT_LEFT
] = 1.0f
;
380 Context
->ChannelMatrix
[SIDE_RIGHT
][FRONT_RIGHT
] = 1.0f
;
381 Context
->ChannelMatrix
[BACK_LEFT
][FRONT_LEFT
] = 1.0f
;
382 Context
->ChannelMatrix
[BACK_RIGHT
][FRONT_RIGHT
] = 1.0f
;
383 Context
->ChannelMatrix
[BACK_CENTER
][FRONT_LEFT
] = aluSqrt(0.5);
384 Context
->ChannelMatrix
[BACK_CENTER
][FRONT_RIGHT
] = aluSqrt(0.5);
385 Context
->NumChan
= 2;
386 Speaker2Chan
[0] = FRONT_LEFT
;
387 Speaker2Chan
[1] = FRONT_RIGHT
;
388 SpeakerAngle
[0] = -90.0f
* M_PI
/180.0f
;
389 SpeakerAngle
[1] = 90.0f
* M_PI
/180.0f
;
392 case AL_FORMAT_STEREO8
:
393 case AL_FORMAT_STEREO16
:
394 case AL_FORMAT_STEREO_FLOAT32
:
395 Context
->ChannelMatrix
[FRONT_CENTER
][FRONT_LEFT
] = aluSqrt(0.5);
396 Context
->ChannelMatrix
[FRONT_CENTER
][FRONT_RIGHT
] = aluSqrt(0.5);
397 Context
->ChannelMatrix
[SIDE_LEFT
][FRONT_LEFT
] = 1.0f
;
398 Context
->ChannelMatrix
[SIDE_RIGHT
][FRONT_RIGHT
] = 1.0f
;
399 Context
->ChannelMatrix
[BACK_LEFT
][FRONT_LEFT
] = 1.0f
;
400 Context
->ChannelMatrix
[BACK_RIGHT
][FRONT_RIGHT
] = 1.0f
;
401 Context
->ChannelMatrix
[BACK_CENTER
][FRONT_LEFT
] = aluSqrt(0.5);
402 Context
->ChannelMatrix
[BACK_CENTER
][FRONT_RIGHT
] = aluSqrt(0.5);
403 Context
->NumChan
= 2;
404 Speaker2Chan
[0] = FRONT_LEFT
;
405 Speaker2Chan
[1] = FRONT_RIGHT
;
406 SpeakerAngle
[0] = -90.0f
* M_PI
/180.0f
;
407 SpeakerAngle
[1] = 90.0f
* M_PI
/180.0f
;
408 SetSpeakerArrangement("layout_STEREO", SpeakerAngle
, Speaker2Chan
, Context
->NumChan
);
411 case AL_FORMAT_QUAD8
:
412 case AL_FORMAT_QUAD16
:
413 case AL_FORMAT_QUAD32
:
414 Context
->ChannelMatrix
[FRONT_CENTER
][FRONT_LEFT
] = aluSqrt(0.5);
415 Context
->ChannelMatrix
[FRONT_CENTER
][FRONT_RIGHT
] = aluSqrt(0.5);
416 Context
->ChannelMatrix
[SIDE_LEFT
][FRONT_LEFT
] = aluSqrt(0.5);
417 Context
->ChannelMatrix
[SIDE_LEFT
][BACK_LEFT
] = aluSqrt(0.5);
418 Context
->ChannelMatrix
[SIDE_RIGHT
][FRONT_RIGHT
] = aluSqrt(0.5);
419 Context
->ChannelMatrix
[SIDE_RIGHT
][BACK_RIGHT
] = aluSqrt(0.5);
420 Context
->ChannelMatrix
[BACK_CENTER
][BACK_LEFT
] = aluSqrt(0.5);
421 Context
->ChannelMatrix
[BACK_CENTER
][BACK_RIGHT
] = aluSqrt(0.5);
422 Context
->NumChan
= 4;
423 Speaker2Chan
[0] = BACK_LEFT
;
424 Speaker2Chan
[1] = FRONT_LEFT
;
425 Speaker2Chan
[2] = FRONT_RIGHT
;
426 Speaker2Chan
[3] = BACK_RIGHT
;
427 SpeakerAngle
[0] = -135.0f
* M_PI
/180.0f
;
428 SpeakerAngle
[1] = -45.0f
* M_PI
/180.0f
;
429 SpeakerAngle
[2] = 45.0f
* M_PI
/180.0f
;
430 SpeakerAngle
[3] = 135.0f
* M_PI
/180.0f
;
431 SetSpeakerArrangement("layout_QUAD", SpeakerAngle
, Speaker2Chan
, Context
->NumChan
);
434 case AL_FORMAT_51CHN8
:
435 case AL_FORMAT_51CHN16
:
436 case AL_FORMAT_51CHN32
:
437 Context
->ChannelMatrix
[SIDE_LEFT
][FRONT_LEFT
] = aluSqrt(0.5);
438 Context
->ChannelMatrix
[SIDE_LEFT
][BACK_LEFT
] = aluSqrt(0.5);
439 Context
->ChannelMatrix
[SIDE_RIGHT
][FRONT_RIGHT
] = aluSqrt(0.5);
440 Context
->ChannelMatrix
[SIDE_RIGHT
][BACK_RIGHT
] = aluSqrt(0.5);
441 Context
->ChannelMatrix
[BACK_CENTER
][BACK_LEFT
] = aluSqrt(0.5);
442 Context
->ChannelMatrix
[BACK_CENTER
][BACK_RIGHT
] = aluSqrt(0.5);
443 Context
->NumChan
= 5;
444 Speaker2Chan
[0] = BACK_LEFT
;
445 Speaker2Chan
[1] = FRONT_LEFT
;
446 Speaker2Chan
[2] = FRONT_CENTER
;
447 Speaker2Chan
[3] = FRONT_RIGHT
;
448 Speaker2Chan
[4] = BACK_RIGHT
;
449 SpeakerAngle
[0] = -110.0f
* M_PI
/180.0f
;
450 SpeakerAngle
[1] = -30.0f
* M_PI
/180.0f
;
451 SpeakerAngle
[2] = 0.0f
* M_PI
/180.0f
;
452 SpeakerAngle
[3] = 30.0f
* M_PI
/180.0f
;
453 SpeakerAngle
[4] = 110.0f
* M_PI
/180.0f
;
454 SetSpeakerArrangement("layout_51CHN", SpeakerAngle
, Speaker2Chan
, Context
->NumChan
);
457 case AL_FORMAT_61CHN8
:
458 case AL_FORMAT_61CHN16
:
459 case AL_FORMAT_61CHN32
:
460 Context
->ChannelMatrix
[BACK_LEFT
][BACK_CENTER
] = aluSqrt(0.5);
461 Context
->ChannelMatrix
[BACK_LEFT
][SIDE_LEFT
] = aluSqrt(0.5);
462 Context
->ChannelMatrix
[BACK_RIGHT
][BACK_CENTER
] = aluSqrt(0.5);
463 Context
->ChannelMatrix
[BACK_RIGHT
][SIDE_RIGHT
] = aluSqrt(0.5);
464 Context
->NumChan
= 6;
465 Speaker2Chan
[0] = SIDE_LEFT
;
466 Speaker2Chan
[1] = FRONT_LEFT
;
467 Speaker2Chan
[2] = FRONT_CENTER
;
468 Speaker2Chan
[3] = FRONT_RIGHT
;
469 Speaker2Chan
[4] = SIDE_RIGHT
;
470 Speaker2Chan
[5] = BACK_CENTER
;
471 SpeakerAngle
[0] = -90.0f
* M_PI
/180.0f
;
472 SpeakerAngle
[1] = -30.0f
* M_PI
/180.0f
;
473 SpeakerAngle
[2] = 0.0f
* M_PI
/180.0f
;
474 SpeakerAngle
[3] = 30.0f
* M_PI
/180.0f
;
475 SpeakerAngle
[4] = 90.0f
* M_PI
/180.0f
;
476 SpeakerAngle
[5] = 180.0f
* M_PI
/180.0f
;
477 SetSpeakerArrangement("layout_61CHN", SpeakerAngle
, Speaker2Chan
, Context
->NumChan
);
480 case AL_FORMAT_71CHN8
:
481 case AL_FORMAT_71CHN16
:
482 case AL_FORMAT_71CHN32
:
483 Context
->ChannelMatrix
[BACK_CENTER
][BACK_LEFT
] = aluSqrt(0.5);
484 Context
->ChannelMatrix
[BACK_CENTER
][BACK_RIGHT
] = aluSqrt(0.5);
485 Context
->NumChan
= 7;
486 Speaker2Chan
[0] = BACK_LEFT
;
487 Speaker2Chan
[1] = SIDE_LEFT
;
488 Speaker2Chan
[2] = FRONT_LEFT
;
489 Speaker2Chan
[3] = FRONT_CENTER
;
490 Speaker2Chan
[4] = FRONT_RIGHT
;
491 Speaker2Chan
[5] = SIDE_RIGHT
;
492 Speaker2Chan
[6] = BACK_RIGHT
;
493 SpeakerAngle
[0] = -150.0f
* M_PI
/180.0f
;
494 SpeakerAngle
[1] = -90.0f
* M_PI
/180.0f
;
495 SpeakerAngle
[2] = -30.0f
* M_PI
/180.0f
;
496 SpeakerAngle
[3] = 0.0f
* M_PI
/180.0f
;
497 SpeakerAngle
[4] = 30.0f
* M_PI
/180.0f
;
498 SpeakerAngle
[5] = 90.0f
* M_PI
/180.0f
;
499 SpeakerAngle
[6] = 150.0f
* M_PI
/180.0f
;
500 SetSpeakerArrangement("layout_71CHN", SpeakerAngle
, Speaker2Chan
, Context
->NumChan
);
507 for(pos
= 0; pos
< LUT_NUM
; pos
++)
510 Theta
= aluLUTpos2Angle(pos
);
512 /* clear all values */
513 offset
= OUTPUTCHANNELS
* pos
;
514 for(s
= 0; s
< OUTPUTCHANNELS
; s
++)
515 Context
->PanningLUT
[offset
+s
] = 0.0f
;
517 /* set panning values */
518 for(s
= 0; s
< Context
->NumChan
- 1; s
++)
520 if(Theta
>= SpeakerAngle
[s
] && Theta
< SpeakerAngle
[s
+1])
522 /* source between speaker s and speaker s+1 */
523 Alpha
= M_PI_2
* (Theta
-SpeakerAngle
[s
]) /
524 (SpeakerAngle
[s
+1]-SpeakerAngle
[s
]);
525 Context
->PanningLUT
[offset
+ Speaker2Chan
[s
]] = cos(Alpha
);
526 Context
->PanningLUT
[offset
+ Speaker2Chan
[s
+1]] = sin(Alpha
);
530 if(s
== Context
->NumChan
- 1)
532 /* source between last and first speaker */
533 if(Theta
< SpeakerAngle
[0])
534 Theta
+= 2.0f
* M_PI
;
535 Alpha
= M_PI_2
* (Theta
-SpeakerAngle
[s
]) /
536 (2.0f
* M_PI
+ SpeakerAngle
[0]-SpeakerAngle
[s
]);
537 Context
->PanningLUT
[offset
+ Speaker2Chan
[s
]] = cos(Alpha
);
538 Context
->PanningLUT
[offset
+ Speaker2Chan
[0]] = sin(Alpha
);
543 static __inline ALint
aluCart2LUTpos(ALfloat re
, ALfloat im
)
546 ALfloat denom
= aluFabs(re
) + aluFabs(im
);
548 pos
= (ALint
)(QUADRANT_NUM
*aluFabs(im
) / denom
+ 0.5);
551 pos
= 2 * QUADRANT_NUM
- pos
;
557 static ALvoid
CalcSourceParams(ALCcontext
*ALContext
, ALsource
*ALSource
,
558 ALenum isMono
, ALfloat
*drysend
,
559 ALfloat
*wetsend
, ALfloat
*pitch
,
560 ALfloat
*drygainhf
, ALfloat
*wetgainhf
)
562 ALfloat InnerAngle
,OuterAngle
,Angle
,Distance
,DryMix
,WetMix
=0.0f
;
563 ALfloat Direction
[3],Position
[3],SourceToListener
[3];
564 ALfloat MinVolume
,MaxVolume
,MinDist
,MaxDist
,Rolloff
,OuterGainHF
;
565 ALfloat ConeVolume
,SourceVolume
,ListenerGain
;
566 ALfloat U
[3],V
[3],N
[3];
567 ALfloat DopplerFactor
, DopplerVelocity
, flSpeedOfSound
, flMaxVelocity
;
568 ALfloat Matrix
[3][3];
569 ALfloat flAttenuation
;
570 ALfloat RoomAttenuation
;
571 ALfloat MetersPerUnit
;
573 ALfloat DryGainHF
= 1.0f
;
574 ALfloat WetGainHF
= 1.0f
;
575 ALfloat DirGain
, AmbientGain
;
576 const ALfloat
*SpeakerGain
;
580 //Get context properties
581 DopplerFactor
= ALContext
->DopplerFactor
* ALSource
->DopplerFactor
;
582 DopplerVelocity
= ALContext
->DopplerVelocity
;
583 flSpeedOfSound
= ALContext
->flSpeedOfSound
;
585 //Get listener properties
586 ListenerGain
= ALContext
->Listener
.Gain
;
587 MetersPerUnit
= ALContext
->Listener
.MetersPerUnit
;
589 //Get source properties
590 SourceVolume
= ALSource
->flGain
;
591 memcpy(Position
, ALSource
->vPosition
, sizeof(ALSource
->vPosition
));
592 memcpy(Direction
, ALSource
->vOrientation
, sizeof(ALSource
->vOrientation
));
593 MinVolume
= ALSource
->flMinGain
;
594 MaxVolume
= ALSource
->flMaxGain
;
595 MinDist
= ALSource
->flRefDistance
;
596 MaxDist
= ALSource
->flMaxDistance
;
597 Rolloff
= ALSource
->flRollOffFactor
;
598 InnerAngle
= ALSource
->flInnerAngle
;
599 OuterAngle
= ALSource
->flOuterAngle
;
600 OuterGainHF
= ALSource
->OuterGainHF
;
601 RoomRolloff
= ALSource
->RoomRolloffFactor
;
603 //Only apply 3D calculations for mono buffers
604 if(isMono
!= AL_FALSE
)
606 //1. Translate Listener to origin (convert to head relative)
607 // Note that Direction and SourceToListener are *not* transformed.
608 // SourceToListener is used with the source and listener velocities,
609 // which are untransformed, and Direction is used with SourceToListener
610 // for the sound cone
611 if(ALSource
->bHeadRelative
==AL_FALSE
)
613 // Build transform matrix
614 aluCrossproduct(ALContext
->Listener
.Forward
, ALContext
->Listener
.Up
, U
); // Right-vector
615 aluNormalize(U
); // Normalized Right-vector
616 memcpy(V
, ALContext
->Listener
.Up
, sizeof(V
)); // Up-vector
617 aluNormalize(V
); // Normalized Up-vector
618 memcpy(N
, ALContext
->Listener
.Forward
, sizeof(N
)); // At-vector
619 aluNormalize(N
); // Normalized At-vector
620 Matrix
[0][0] = U
[0]; Matrix
[0][1] = V
[0]; Matrix
[0][2] = -N
[0];
621 Matrix
[1][0] = U
[1]; Matrix
[1][1] = V
[1]; Matrix
[1][2] = -N
[1];
622 Matrix
[2][0] = U
[2]; Matrix
[2][1] = V
[2]; Matrix
[2][2] = -N
[2];
624 // Translate source position into listener space
625 Position
[0] -= ALContext
->Listener
.Position
[0];
626 Position
[1] -= ALContext
->Listener
.Position
[1];
627 Position
[2] -= ALContext
->Listener
.Position
[2];
629 SourceToListener
[0] = -Position
[0];
630 SourceToListener
[1] = -Position
[1];
631 SourceToListener
[2] = -Position
[2];
633 // Transform source position into listener space
634 aluMatrixVector(Position
, Matrix
);
638 SourceToListener
[0] = -Position
[0];
639 SourceToListener
[1] = -Position
[1];
640 SourceToListener
[2] = -Position
[2];
642 aluNormalize(SourceToListener
);
643 aluNormalize(Direction
);
645 //2. Calculate distance attenuation
646 Distance
= aluSqrt(aluDotproduct(Position
, Position
));
648 if(ALSource
->Send
[0].Slot
)
650 if(ALSource
->Send
[0].Slot
->effect
.type
== AL_EFFECT_REVERB
)
651 RoomRolloff
+= ALSource
->Send
[0].Slot
->effect
.Reverb
.RoomRolloffFactor
;
654 flAttenuation
= 1.0f
;
655 RoomAttenuation
= 1.0f
;
656 switch (ALSource
->DistanceModel
)
658 case AL_INVERSE_DISTANCE_CLAMPED
:
659 Distance
=__max(Distance
,MinDist
);
660 Distance
=__min(Distance
,MaxDist
);
661 if (MaxDist
< MinDist
)
664 case AL_INVERSE_DISTANCE
:
667 if ((MinDist
+ (Rolloff
* (Distance
- MinDist
))) > 0.0f
)
668 flAttenuation
= MinDist
/ (MinDist
+ (Rolloff
* (Distance
- MinDist
)));
669 if ((MinDist
+ (RoomRolloff
* (Distance
- MinDist
))) > 0.0f
)
670 RoomAttenuation
= MinDist
/ (MinDist
+ (RoomRolloff
* (Distance
- MinDist
)));
674 case AL_LINEAR_DISTANCE_CLAMPED
:
675 Distance
=__max(Distance
,MinDist
);
676 Distance
=__min(Distance
,MaxDist
);
677 if (MaxDist
< MinDist
)
680 case AL_LINEAR_DISTANCE
:
681 Distance
=__min(Distance
,MaxDist
);
682 if (MaxDist
!= MinDist
)
684 flAttenuation
= 1.0f
- (Rolloff
*(Distance
-MinDist
)/(MaxDist
- MinDist
));
685 RoomAttenuation
= 1.0f
- (RoomRolloff
*(Distance
-MinDist
)/(MaxDist
- MinDist
));
689 case AL_EXPONENT_DISTANCE_CLAMPED
:
690 Distance
=__max(Distance
,MinDist
);
691 Distance
=__min(Distance
,MaxDist
);
692 if (MaxDist
< MinDist
)
695 case AL_EXPONENT_DISTANCE
:
696 if ((Distance
> 0.0f
) && (MinDist
> 0.0f
))
698 flAttenuation
= (ALfloat
)pow(Distance
/MinDist
, -Rolloff
);
699 RoomAttenuation
= (ALfloat
)pow(Distance
/MinDist
, -RoomRolloff
);
704 flAttenuation
= 1.0f
;
705 RoomAttenuation
= 1.0f
;
709 // Distance-based air absorption
710 if(ALSource
->AirAbsorptionFactor
> 0.0f
&& ALContext
->DistanceModel
!= AL_NONE
)
712 ALfloat dist
= Distance
-MinDist
;
715 if(dist
< 0.0f
) dist
= 0.0f
;
716 // Absorption calculation is done in dB
717 absorb
= (ALSource
->AirAbsorptionFactor
*AIRABSORBGAINDBHF
) *
718 (dist
*MetersPerUnit
);
719 // Convert dB to linear gain before applying
720 absorb
= pow(10.0, absorb
/20.0);
725 // Source Gain + Attenuation and clamp to Min/Max Gain
726 DryMix
= SourceVolume
* flAttenuation
;
727 DryMix
= __min(DryMix
,MaxVolume
);
728 DryMix
= __max(DryMix
,MinVolume
);
730 WetMix
= SourceVolume
* RoomAttenuation
;
731 WetMix
= __min(WetMix
,MaxVolume
);
732 WetMix
= __max(WetMix
,MinVolume
);
734 //3. Apply directional soundcones
735 Angle
= aluAcos(aluDotproduct(Direction
,SourceToListener
)) * 180.0f
/M_PI
;
736 if(Angle
>= InnerAngle
&& Angle
<= OuterAngle
)
738 ALfloat scale
= (Angle
-InnerAngle
) / (OuterAngle
-InnerAngle
);
739 ConeVolume
= (1.0f
+(ALSource
->flOuterGain
-1.0f
)*scale
);
740 DryMix
*= ConeVolume
;
741 if(ALSource
->WetGainAuto
)
742 WetMix
*= ConeVolume
;
743 if(ALSource
->DryGainHFAuto
)
744 DryGainHF
*= (1.0f
+(OuterGainHF
-1.0f
)*scale
);
745 if(ALSource
->WetGainHFAuto
)
746 WetGainHF
*= (1.0f
+(OuterGainHF
-1.0f
)*scale
);
748 else if(Angle
> OuterAngle
)
750 ConeVolume
= (1.0f
+(ALSource
->flOuterGain
-1.0f
));
751 DryMix
*= ConeVolume
;
752 if(ALSource
->WetGainAuto
)
753 WetMix
*= ConeVolume
;
754 if(ALSource
->DryGainHFAuto
)
755 DryGainHF
*= (1.0f
+(OuterGainHF
-1.0f
));
756 if(ALSource
->WetGainHFAuto
)
757 WetGainHF
*= (1.0f
+(OuterGainHF
-1.0f
));
760 //4. Calculate Velocity
761 if(DopplerFactor
!= 0.0f
)
763 ALfloat flVSS
, flVLS
= 0.0f
;
765 if(ALSource
->bHeadRelative
==AL_FALSE
)
766 flVLS
= aluDotproduct(ALContext
->Listener
.Velocity
, SourceToListener
);
767 flVSS
= aluDotproduct(ALSource
->vVelocity
, SourceToListener
);
769 flMaxVelocity
= (DopplerVelocity
* flSpeedOfSound
) / DopplerFactor
;
771 if (flVSS
>= flMaxVelocity
)
772 flVSS
= (flMaxVelocity
- 1.0f
);
773 else if (flVSS
<= -flMaxVelocity
)
774 flVSS
= -flMaxVelocity
+ 1.0f
;
776 if (flVLS
>= flMaxVelocity
)
777 flVLS
= (flMaxVelocity
- 1.0f
);
778 else if (flVLS
<= -flMaxVelocity
)
779 flVLS
= -flMaxVelocity
+ 1.0f
;
781 pitch
[0] = ALSource
->flPitch
*
782 ((flSpeedOfSound
* DopplerVelocity
) - (DopplerFactor
* flVLS
)) /
783 ((flSpeedOfSound
* DopplerVelocity
) - (DopplerFactor
* flVSS
));
786 pitch
[0] = ALSource
->flPitch
;
788 if(ALSource
->Send
[0].Slot
&&
789 ALSource
->Send
[0].Slot
->effect
.type
!= AL_EFFECT_NULL
)
791 if(ALSource
->Send
[0].Slot
->AuxSendAuto
)
793 // Apply minimal attenuation in place of missing statistical
795 WetMix
*= pow(DryMix
, 1.0f
/ 2.0f
);
799 // If the slot's auxilliary send auto is off, the data sent to the
800 // effect slot is the same as the dry path, sans filter effects
802 WetGainHF
= DryGainHF
;
805 // Note that this is really applied by the effect slot. However,
806 // it's easier (more optimal) to handle it here.
807 if(ALSource
->Send
[0].Slot
->effect
.type
== AL_EFFECT_REVERB
)
808 WetGainHF
*= ALSource
->Send
[0].Slot
->effect
.Reverb
.GainHF
;
816 //5. Apply filter gains and filters
817 switch(ALSource
->DirectFilter
.type
)
819 case AL_FILTER_LOWPASS
:
820 DryMix
*= ALSource
->DirectFilter
.Gain
;
821 DryGainHF
*= ALSource
->DirectFilter
.GainHF
;
825 switch(ALSource
->Send
[0].WetFilter
.type
)
827 case AL_FILTER_LOWPASS
:
828 WetMix
*= ALSource
->Send
[0].WetFilter
.Gain
;
829 WetGainHF
*= ALSource
->Send
[0].WetFilter
.GainHF
;
833 DryMix
*= ListenerGain
;
834 WetMix
*= ListenerGain
;
836 // Use energy-preserving panning algorithm for multi-speaker playback
837 aluNormalize(Position
);
839 pos
= aluCart2LUTpos(-Position
[2], Position
[0]);
840 SpeakerGain
= &ALContext
->PanningLUT
[OUTPUTCHANNELS
* pos
];
842 DirGain
= aluSqrt(Position
[0]*Position
[0] + Position
[2]*Position
[2]);
843 // elevation adjustment for directional gain. this sucks, but
844 // has low complexity
845 AmbientGain
= 1.0/aluSqrt(ALContext
->NumChan
) * (1.0-DirGain
);
846 for(s
= 0; s
< OUTPUTCHANNELS
; s
++)
848 ALfloat gain
= SpeakerGain
[s
]*DirGain
+ AmbientGain
;
849 drysend
[s
] = DryMix
* gain
;
853 // Update filter coefficients. Calculations based on the I3DL2 spec.
854 cw
= cos(2.0*M_PI
* LOWPASSFREQCUTOFF
/ ALContext
->Frequency
);
855 // We use four chained one-pole filters, so we need to take the fourth
856 // root of the squared gain, which is the same as the square root of
858 // Be careful with gains < 0.0001, as that causes the coefficient to
859 // head towards 1, which will flatten the signal
860 g
= aluSqrt(__max(DryGainHF
, 0.0001f
));
862 if(g
< 0.9999f
) // 1-epsilon
863 a
= (1 - g
*cw
- aluSqrt(2*g
*(1-cw
) - g
*g
*(1 - cw
*cw
))) / (1 - g
);
864 ALSource
->iirFilter
.coeff
= a
;
866 g
= aluSqrt(__max(WetGainHF
, 0.0001f
));
868 if(g
< 0.9999f
) // 1-epsilon
869 a
= (1 - g
*cw
- aluSqrt(2*g
*(1-cw
) - g
*g
*(1 - cw
*cw
))) / (1 - g
);
870 ALSource
->Send
[0].iirFilter
.coeff
= a
;
872 *drygainhf
= DryGainHF
;
873 *wetgainhf
= WetGainHF
;
877 //1. Multi-channel buffers always play "normal"
878 pitch
[0] = ALSource
->flPitch
;
880 DryMix
= SourceVolume
;
882 switch(ALSource
->DirectFilter
.type
)
884 case AL_FILTER_LOWPASS
:
885 DryMix
*= ALSource
->DirectFilter
.Gain
;
886 DryGainHF
*= ALSource
->DirectFilter
.GainHF
;
890 drysend
[FRONT_LEFT
] = DryMix
* ListenerGain
;
891 drysend
[FRONT_RIGHT
] = DryMix
* ListenerGain
;
892 drysend
[SIDE_LEFT
] = DryMix
* ListenerGain
;
893 drysend
[SIDE_RIGHT
] = DryMix
* ListenerGain
;
894 drysend
[BACK_LEFT
] = DryMix
* ListenerGain
;
895 drysend
[BACK_RIGHT
] = DryMix
* ListenerGain
;
896 drysend
[FRONT_CENTER
] = DryMix
* ListenerGain
;
897 drysend
[BACK_CENTER
] = DryMix
* ListenerGain
;
898 drysend
[LFE
] = DryMix
* ListenerGain
;
901 cw
= cos(2.0*M_PI
* LOWPASSFREQCUTOFF
/ ALContext
->Frequency
);
902 g
= __max(DryGainHF
, 0.01f
);
904 if(g
< 0.9999f
) // 1-epsilon
905 a
= (1 - g
*cw
- aluSqrt(2*g
*(1-cw
) - g
*g
*(1 - cw
*cw
))) / (1 - g
);
906 ALSource
->iirFilter
.coeff
= a
;
907 ALSource
->Send
[0].iirFilter
.coeff
= 0.0f
;
909 *drygainhf
= DryGainHF
;
910 *wetgainhf
= WetGainHF
;
914 static __inline ALshort
lerp(ALshort val1
, ALshort val2
, ALint frac
)
916 return val1
+ (((val2
-val1
)*frac
)>>FRACTIONBITS
);
919 ALvoid
aluMixData(ALCcontext
*ALContext
,ALvoid
*buffer
,ALsizei size
,ALenum format
)
921 static float DryBuffer
[BUFFERSIZE
][OUTPUTCHANNELS
];
922 static float WetBuffer
[BUFFERSIZE
];
923 ALfloat (*Matrix
)[OUTPUTCHANNELS
] = ALContext
->ChannelMatrix
;
924 ALfloat newDrySend
[OUTPUTCHANNELS
] = { 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
};
925 ALfloat newWetSend
= 0.0f
;
926 ALfloat DryGainHF
= 0.0f
;
927 ALfloat WetGainHF
= 0.0f
;
931 ALfloat dryGainStep
[OUTPUTCHANNELS
];
933 ALuint BlockAlign
,BufferSize
;
934 ALuint DataSize
=0,DataPosInt
=0,DataPosFrac
=0;
935 ALuint Channels
,Frequency
,ulExtraSamples
;
943 ALeffectslot
*ALEffectSlot
;
944 ALfloat values
[OUTPUTCHANNELS
];
948 ALbufferlistitem
*BufferListItem
;
950 ALint64 DataSize64
,DataPos64
;
951 FILTER
*DryFilter
, *WetFilter
;
954 SuspendContext(ALContext
);
956 #if defined(HAVE_FESETROUND)
957 fpuState
= fegetround();
958 fesetround(FE_TOWARDZERO
);
959 #elif defined(HAVE__CONTROLFP)
960 fpuState
= _controlfp(0, 0);
961 _controlfp(_RC_CHOP
, _MCW_RC
);
966 //Figure output format variables
967 BlockAlign
= aluChannelsFromFormat(format
);
968 BlockAlign
*= aluBytesFromFormat(format
);
974 SamplesToDo
= min(size
, BUFFERSIZE
);
977 ALEffectSlot
= ALContext
->AuxiliaryEffectSlot
;
978 ALSource
= ALContext
->Source
;
979 rampLength
= ALContext
->Frequency
* MIN_RAMP_LENGTH
/ 1000;
987 rampLength
= max(rampLength
, SamplesToDo
);
989 //Clear mixing buffer
990 memset(WetBuffer
, 0, SamplesToDo
*sizeof(ALfloat
));
991 memset(DryBuffer
, 0, SamplesToDo
*OUTPUTCHANNELS
*sizeof(ALfloat
));
997 State
= ALSource
->state
;
999 while(State
== AL_PLAYING
&& j
< SamplesToDo
)
1006 if((Buffer
= ALSource
->ulBufferID
))
1008 ALBuffer
= (ALbuffer
*)ALTHUNK_LOOKUPENTRY(Buffer
);
1010 Data
= ALBuffer
->data
;
1011 Channels
= aluChannelsFromFormat(ALBuffer
->format
);
1012 DataSize
= ALBuffer
->size
;
1013 DataSize
/= Channels
* aluBytesFromFormat(ALBuffer
->format
);
1014 Frequency
= ALBuffer
->frequency
;
1015 DataPosInt
= ALSource
->position
;
1016 DataPosFrac
= ALSource
->position_fraction
;
1018 if(DataPosInt
>= DataSize
)
1021 CalcSourceParams(ALContext
, ALSource
,
1022 (Channels
==1) ? AL_TRUE
: AL_FALSE
,
1023 newDrySend
, &newWetSend
, &Pitch
,
1024 &DryGainHF
, &WetGainHF
);
1026 Pitch
= (Pitch
*Frequency
) / ALContext
->Frequency
;
1028 if(DuplicateStereo
&& Channels
> 1)
1032 Matrix
[FRONT_LEFT
][SIDE_LEFT
] = 1.0f
;
1033 Matrix
[FRONT_RIGHT
][SIDE_RIGHT
] = 1.0f
;
1034 Matrix
[FRONT_LEFT
][BACK_LEFT
] = 1.0f
;
1035 Matrix
[FRONT_RIGHT
][BACK_RIGHT
] = 1.0f
;
1039 Matrix
[FRONT_LEFT
][SIDE_LEFT
] = 0.0f
;
1040 Matrix
[FRONT_RIGHT
][SIDE_RIGHT
] = 0.0f
;
1041 Matrix
[FRONT_LEFT
][BACK_LEFT
] = 0.0f
;
1042 Matrix
[FRONT_RIGHT
][BACK_RIGHT
] = 0.0f
;
1047 DryFilter
= &ALSource
->iirFilter
;
1048 WetFilter
= &ALSource
->Send
[0].iirFilter
;
1049 DrySend
= ALSource
->DryGains
;
1050 WetSend
= &ALSource
->WetGain
;
1052 //Compute the gain steps for each output channel
1053 if(ALSource
->FirstStart
&& DataPosInt
== 0 && DataPosFrac
== 0)
1055 for(i
= 0;i
< OUTPUTCHANNELS
;i
++)
1057 DrySend
[i
] = newDrySend
[i
];
1060 *WetSend
= newWetSend
;
1065 for(i
= 0;i
< OUTPUTCHANNELS
;i
++)
1066 dryGainStep
[i
] = (newDrySend
[i
]-DrySend
[i
]) / rampLength
;
1067 wetGainStep
= (newWetSend
-(*WetSend
)) / rampLength
;
1069 ALSource
->FirstStart
= AL_FALSE
;
1071 //Compute 18.14 fixed point step
1072 if(Pitch
> (float)MAX_PITCH
)
1073 Pitch
= (float)MAX_PITCH
;
1074 increment
= (ALint
)(Pitch
*(ALfloat
)(1L<<FRACTIONBITS
));
1076 increment
= (1<<FRACTIONBITS
);
1078 //Figure out how many samples we can mix.
1079 DataSize64
= DataSize
;
1080 DataSize64
<<= FRACTIONBITS
;
1081 DataPos64
= DataPosInt
;
1082 DataPos64
<<= FRACTIONBITS
;
1083 DataPos64
+= DataPosFrac
;
1084 BufferSize
= (ALuint
)((DataSize64
-DataPos64
+(increment
-1)) / increment
);
1086 BufferListItem
= ALSource
->queue
;
1087 for(loop
= 0; loop
< ALSource
->BuffersPlayed
; loop
++)
1090 BufferListItem
= BufferListItem
->next
;
1094 if (BufferListItem
->next
)
1096 ALbuffer
*NextBuf
= (ALbuffer
*)ALTHUNK_LOOKUPENTRY(BufferListItem
->next
->buffer
);
1097 if(NextBuf
&& NextBuf
->data
)
1099 ulExtraSamples
= min(NextBuf
->size
, (ALint
)(ALBuffer
->padding
*Channels
*2));
1100 memcpy(&Data
[DataSize
*Channels
], NextBuf
->data
, ulExtraSamples
);
1103 else if (ALSource
->bLooping
)
1105 ALbuffer
*NextBuf
= (ALbuffer
*)ALTHUNK_LOOKUPENTRY(ALSource
->queue
->buffer
);
1106 if (NextBuf
&& NextBuf
->data
)
1108 ulExtraSamples
= min(NextBuf
->size
, (ALint
)(ALBuffer
->padding
*Channels
*2));
1109 memcpy(&Data
[DataSize
*Channels
], NextBuf
->data
, ulExtraSamples
);
1113 memset(&Data
[DataSize
*Channels
], 0, (ALBuffer
->padding
*Channels
*2));
1115 BufferSize
= min(BufferSize
, (SamplesToDo
-j
));
1117 //Actual sample mixing loop
1119 Data
+= DataPosInt
*Channels
;
1121 if(Channels
== 1) /* Mono */
1127 for(i
= 0;i
< OUTPUTCHANNELS
;i
++)
1128 DrySend
[i
] += dryGainStep
[i
];
1129 *WetSend
+= wetGainStep
;
1131 //First order interpolator
1132 value
= lerp(Data
[k
], Data
[k
+1], DataPosFrac
);
1134 //Direct path final mix buffer and panning
1135 outsamp
= lpFilter(DryFilter
, value
);
1136 DryBuffer
[j
][FRONT_LEFT
] += outsamp
*DrySend
[FRONT_LEFT
];
1137 DryBuffer
[j
][FRONT_RIGHT
] += outsamp
*DrySend
[FRONT_RIGHT
];
1138 DryBuffer
[j
][SIDE_LEFT
] += outsamp
*DrySend
[SIDE_LEFT
];
1139 DryBuffer
[j
][SIDE_RIGHT
] += outsamp
*DrySend
[SIDE_RIGHT
];
1140 DryBuffer
[j
][BACK_LEFT
] += outsamp
*DrySend
[BACK_LEFT
];
1141 DryBuffer
[j
][BACK_RIGHT
] += outsamp
*DrySend
[BACK_RIGHT
];
1142 DryBuffer
[j
][FRONT_CENTER
] += outsamp
*DrySend
[FRONT_CENTER
];
1143 DryBuffer
[j
][BACK_CENTER
] += outsamp
*DrySend
[BACK_CENTER
];
1145 //Room path final mix buffer and panning
1146 outsamp
= lpFilter(WetFilter
, value
);
1147 WetBuffer
[j
] += outsamp
*(*WetSend
);
1149 DataPosFrac
+= increment
;
1150 k
+= DataPosFrac
>>FRACTIONBITS
;
1151 DataPosFrac
&= FRACTIONMASK
;
1155 else if(Channels
== 2) /* Stereo */
1157 const int chans
[] = {
1158 FRONT_LEFT
, FRONT_RIGHT
1161 #define DO_MIX() do { \
1162 *WetSend += wetGainStep*BufferSize; \
1163 while(BufferSize--) \
1165 for(i = 0;i < OUTPUTCHANNELS;i++) \
1166 DrySend[i] += dryGainStep[i]; \
1168 for(i = 0;i < Channels;i++) \
1170 value = lerp(Data[k*Channels + i], Data[(k+1)*Channels + i], DataPosFrac); \
1171 values[i] = lpFilterMC(DryFilter, chans[i], value)*DrySend[chans[i]]; \
1173 for(out = 0;out < OUTPUTCHANNELS;out++) \
1175 ALfloat sum = 0.0f; \
1176 for(i = 0;i < Channels;i++) \
1177 sum += values[i]*Matrix[chans[i]][out]; \
1178 DryBuffer[j][out] += sum; \
1181 DataPosFrac += increment; \
1182 k += DataPosFrac>>FRACTIONBITS; \
1183 DataPosFrac &= FRACTIONMASK; \
1190 else if(Channels
== 4) /* Quad */
1192 const int chans
[] = {
1193 FRONT_LEFT
, FRONT_RIGHT
,
1194 BACK_LEFT
, BACK_RIGHT
1199 else if(Channels
== 6) /* 5.1 */
1201 const int chans
[] = {
1202 FRONT_LEFT
, FRONT_RIGHT
,
1204 BACK_LEFT
, BACK_RIGHT
1209 else if(Channels
== 7) /* 6.1 */
1211 const int chans
[] = {
1212 FRONT_LEFT
, FRONT_RIGHT
,
1215 SIDE_LEFT
, SIDE_RIGHT
1220 else if(Channels
== 8) /* 7.1 */
1222 const int chans
[] = {
1223 FRONT_LEFT
, FRONT_RIGHT
,
1225 BACK_LEFT
, BACK_RIGHT
,
1226 SIDE_LEFT
, SIDE_RIGHT
1234 *WetSend
+= wetGainStep
*BufferSize
;
1235 for(i
= 0;i
< OUTPUTCHANNELS
;i
++)
1236 DrySend
[i
] += dryGainStep
[i
]*BufferSize
;
1239 DataPosFrac
+= increment
;
1240 k
+= DataPosFrac
>>FRACTIONBITS
;
1241 DataPosFrac
&= FRACTIONMASK
;
1247 //Update source info
1248 ALSource
->position
= DataPosInt
;
1249 ALSource
->position_fraction
= DataPosFrac
;
1254 //Handle looping sources
1255 if(!Buffer
|| DataPosInt
>= DataSize
)
1260 Looping
= ALSource
->bLooping
;
1261 if(ALSource
->BuffersPlayed
< (ALSource
->BuffersInQueue
-1))
1263 BufferListItem
= ALSource
->queue
;
1264 for(loop
= 0; loop
<= ALSource
->BuffersPlayed
; loop
++)
1269 BufferListItem
->bufferstate
= PROCESSED
;
1270 BufferListItem
= BufferListItem
->next
;
1274 ALSource
->ulBufferID
= BufferListItem
->buffer
;
1275 ALSource
->position
= DataPosInt
-DataSize
;
1276 ALSource
->position_fraction
= DataPosFrac
;
1277 ALSource
->BuffersPlayed
++;
1284 ALSource
->state
= AL_STOPPED
;
1285 ALSource
->inuse
= AL_FALSE
;
1286 ALSource
->BuffersPlayed
= ALSource
->BuffersInQueue
;
1287 BufferListItem
= ALSource
->queue
;
1288 while(BufferListItem
!= NULL
)
1290 BufferListItem
->bufferstate
= PROCESSED
;
1291 BufferListItem
= BufferListItem
->next
;
1293 ALSource
->position
= DataSize
;
1294 ALSource
->position_fraction
= 0;
1298 /* alSourceRewind */
1300 ALSource
->state
= AL_PLAYING
;
1301 ALSource
->inuse
= AL_TRUE
;
1302 ALSource
->play
= AL_TRUE
;
1303 ALSource
->BuffersPlayed
= 0;
1304 BufferListItem
= ALSource
->queue
;
1305 while(BufferListItem
!= NULL
)
1307 BufferListItem
->bufferstate
= PENDING
;
1308 BufferListItem
= BufferListItem
->next
;
1310 ALSource
->ulBufferID
= ALSource
->queue
->buffer
;
1312 if(ALSource
->BuffersInQueue
== 1)
1313 ALSource
->position
= DataPosInt
%DataSize
;
1315 ALSource
->position
= DataPosInt
-DataSize
;
1316 ALSource
->position_fraction
= DataPosFrac
;
1323 State
= ALSource
->state
;
1326 ALSource
= ALSource
->next
;
1329 // effect slot processing
1332 if(ALEffectSlot
->effect
.type
== AL_EFFECT_REVERB
)
1333 VerbProcess(ALEffectSlot
->ReverbState
, SamplesToDo
, WetBuffer
, DryBuffer
);
1335 ALEffectSlot
= ALEffectSlot
->next
;
1338 //Post processing loop
1341 case AL_FORMAT_MONO8
:
1342 for(i
= 0;i
< SamplesToDo
;i
++)
1344 ((ALubyte
*)buffer
)[0] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_LEFT
]+DryBuffer
[i
][FRONT_RIGHT
])>>8)+128);
1345 buffer
= ((ALubyte
*)buffer
) + 1;
1348 case AL_FORMAT_STEREO8
:
1349 if(ALContext
&& ALContext
->bs2b
)
1351 for(i
= 0;i
< SamplesToDo
;i
++)
1354 samples
[0] = DryBuffer
[i
][FRONT_LEFT
];
1355 samples
[1] = DryBuffer
[i
][FRONT_RIGHT
];
1356 bs2b_cross_feed(ALContext
->bs2b
, samples
);
1357 ((ALubyte
*)buffer
)[0] = (ALubyte
)((aluF2S(samples
[0])>>8)+128);
1358 ((ALubyte
*)buffer
)[1] = (ALubyte
)((aluF2S(samples
[1])>>8)+128);
1359 buffer
= ((ALubyte
*)buffer
) + 2;
1364 for(i
= 0;i
< SamplesToDo
;i
++)
1366 ((ALubyte
*)buffer
)[0] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_LEFT
])>>8)+128);
1367 ((ALubyte
*)buffer
)[1] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_RIGHT
])>>8)+128);
1368 buffer
= ((ALubyte
*)buffer
) + 2;
1372 case AL_FORMAT_QUAD8
:
1373 for(i
= 0;i
< SamplesToDo
;i
++)
1375 ((ALubyte
*)buffer
)[0] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_LEFT
])>>8)+128);
1376 ((ALubyte
*)buffer
)[1] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_RIGHT
])>>8)+128);
1377 ((ALubyte
*)buffer
)[2] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_LEFT
])>>8)+128);
1378 ((ALubyte
*)buffer
)[3] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_RIGHT
])>>8)+128);
1379 buffer
= ((ALubyte
*)buffer
) + 4;
1382 case AL_FORMAT_51CHN8
:
1383 for(i
= 0;i
< SamplesToDo
;i
++)
1385 ((ALubyte
*)buffer
)[0] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_LEFT
])>>8)+128);
1386 ((ALubyte
*)buffer
)[1] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_RIGHT
])>>8)+128);
1387 #ifdef _WIN32 /* Of course, Windows can't use the same ordering... */
1388 ((ALubyte
*)buffer
)[2] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_CENTER
])>>8)+128);
1389 ((ALubyte
*)buffer
)[3] = (ALubyte
)((aluF2S(DryBuffer
[i
][LFE
])>>8)+128);
1390 ((ALubyte
*)buffer
)[4] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_LEFT
])>>8)+128);
1391 ((ALubyte
*)buffer
)[5] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_RIGHT
])>>8)+128);
1393 ((ALubyte
*)buffer
)[2] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_LEFT
])>>8)+128);
1394 ((ALubyte
*)buffer
)[3] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_RIGHT
])>>8)+128);
1395 ((ALubyte
*)buffer
)[4] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_CENTER
])>>8)+128);
1396 ((ALubyte
*)buffer
)[5] = (ALubyte
)((aluF2S(DryBuffer
[i
][LFE
])>>8)+128);
1398 buffer
= ((ALubyte
*)buffer
) + 6;
1401 case AL_FORMAT_61CHN8
:
1402 for(i
= 0;i
< SamplesToDo
;i
++)
1404 ((ALubyte
*)buffer
)[0] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_LEFT
])>>8)+128);
1405 ((ALubyte
*)buffer
)[1] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_RIGHT
])>>8)+128);
1406 ((ALubyte
*)buffer
)[2] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_CENTER
])>>8)+128);
1407 ((ALubyte
*)buffer
)[3] = (ALubyte
)((aluF2S(DryBuffer
[i
][LFE
])>>8)+128);
1408 ((ALubyte
*)buffer
)[4] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_CENTER
])>>8)+128);
1409 ((ALubyte
*)buffer
)[5] = (ALubyte
)((aluF2S(DryBuffer
[i
][SIDE_LEFT
])>>8)+128);
1410 ((ALubyte
*)buffer
)[6] = (ALubyte
)((aluF2S(DryBuffer
[i
][SIDE_RIGHT
])>>8)+128);
1411 buffer
= ((ALubyte
*)buffer
) + 7;
1414 case AL_FORMAT_71CHN8
:
1415 for(i
= 0;i
< SamplesToDo
;i
++)
1417 ((ALubyte
*)buffer
)[0] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_LEFT
])>>8)+128);
1418 ((ALubyte
*)buffer
)[1] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_RIGHT
])>>8)+128);
1420 ((ALubyte
*)buffer
)[2] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_CENTER
])>>8)+128);
1421 ((ALubyte
*)buffer
)[3] = (ALubyte
)((aluF2S(DryBuffer
[i
][LFE
])>>8)+128);
1422 ((ALubyte
*)buffer
)[4] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_LEFT
])>>8)+128);
1423 ((ALubyte
*)buffer
)[5] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_RIGHT
])>>8)+128);
1425 ((ALubyte
*)buffer
)[2] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_LEFT
])>>8)+128);
1426 ((ALubyte
*)buffer
)[3] = (ALubyte
)((aluF2S(DryBuffer
[i
][BACK_RIGHT
])>>8)+128);
1427 ((ALubyte
*)buffer
)[4] = (ALubyte
)((aluF2S(DryBuffer
[i
][FRONT_CENTER
])>>8)+128);
1428 ((ALubyte
*)buffer
)[5] = (ALubyte
)((aluF2S(DryBuffer
[i
][LFE
])>>8)+128);
1430 ((ALubyte
*)buffer
)[6] = (ALubyte
)((aluF2S(DryBuffer
[i
][SIDE_LEFT
])>>8)+128);
1431 ((ALubyte
*)buffer
)[7] = (ALubyte
)((aluF2S(DryBuffer
[i
][SIDE_RIGHT
])>>8)+128);
1432 buffer
= ((ALubyte
*)buffer
) + 8;
1436 case AL_FORMAT_MONO16
:
1437 for(i
= 0;i
< SamplesToDo
;i
++)
1439 ((ALshort
*)buffer
)[0] = aluF2S(DryBuffer
[i
][FRONT_LEFT
]+DryBuffer
[i
][FRONT_RIGHT
]);
1440 buffer
= ((ALshort
*)buffer
) + 1;
1443 case AL_FORMAT_STEREO16
:
1444 if(ALContext
&& ALContext
->bs2b
)
1446 for(i
= 0;i
< SamplesToDo
;i
++)
1449 samples
[0] = DryBuffer
[i
][FRONT_LEFT
];
1450 samples
[1] = DryBuffer
[i
][FRONT_RIGHT
];
1451 bs2b_cross_feed(ALContext
->bs2b
, samples
);
1452 ((ALshort
*)buffer
)[0] = aluF2S(samples
[0]);
1453 ((ALshort
*)buffer
)[1] = aluF2S(samples
[1]);
1454 buffer
= ((ALshort
*)buffer
) + 2;
1459 for(i
= 0;i
< SamplesToDo
;i
++)
1461 ((ALshort
*)buffer
)[0] = aluF2S(DryBuffer
[i
][FRONT_LEFT
]);
1462 ((ALshort
*)buffer
)[1] = aluF2S(DryBuffer
[i
][FRONT_RIGHT
]);
1463 buffer
= ((ALshort
*)buffer
) + 2;
1467 case AL_FORMAT_QUAD16
:
1468 for(i
= 0;i
< SamplesToDo
;i
++)
1470 ((ALshort
*)buffer
)[0] = aluF2S(DryBuffer
[i
][FRONT_LEFT
]);
1471 ((ALshort
*)buffer
)[1] = aluF2S(DryBuffer
[i
][FRONT_RIGHT
]);
1472 ((ALshort
*)buffer
)[2] = aluF2S(DryBuffer
[i
][BACK_LEFT
]);
1473 ((ALshort
*)buffer
)[3] = aluF2S(DryBuffer
[i
][BACK_RIGHT
]);
1474 buffer
= ((ALshort
*)buffer
) + 4;
1477 case AL_FORMAT_51CHN16
:
1478 for(i
= 0;i
< SamplesToDo
;i
++)
1480 ((ALshort
*)buffer
)[0] = aluF2S(DryBuffer
[i
][FRONT_LEFT
]);
1481 ((ALshort
*)buffer
)[1] = aluF2S(DryBuffer
[i
][FRONT_RIGHT
]);
1483 ((ALshort
*)buffer
)[2] = aluF2S(DryBuffer
[i
][FRONT_CENTER
]);
1484 ((ALshort
*)buffer
)[3] = aluF2S(DryBuffer
[i
][LFE
]);
1485 ((ALshort
*)buffer
)[4] = aluF2S(DryBuffer
[i
][BACK_LEFT
]);
1486 ((ALshort
*)buffer
)[5] = aluF2S(DryBuffer
[i
][BACK_RIGHT
]);
1488 ((ALshort
*)buffer
)[2] = aluF2S(DryBuffer
[i
][BACK_LEFT
]);
1489 ((ALshort
*)buffer
)[3] = aluF2S(DryBuffer
[i
][BACK_RIGHT
]);
1490 ((ALshort
*)buffer
)[4] = aluF2S(DryBuffer
[i
][FRONT_CENTER
]);
1491 ((ALshort
*)buffer
)[5] = aluF2S(DryBuffer
[i
][LFE
]);
1493 buffer
= ((ALshort
*)buffer
) + 6;
1496 case AL_FORMAT_61CHN16
:
1497 for(i
= 0;i
< SamplesToDo
;i
++)
1499 ((ALshort
*)buffer
)[0] = aluF2S(DryBuffer
[i
][FRONT_LEFT
]);
1500 ((ALshort
*)buffer
)[1] = aluF2S(DryBuffer
[i
][FRONT_RIGHT
]);
1501 ((ALshort
*)buffer
)[2] = aluF2S(DryBuffer
[i
][FRONT_CENTER
]);
1502 ((ALshort
*)buffer
)[3] = aluF2S(DryBuffer
[i
][LFE
]);
1503 ((ALshort
*)buffer
)[4] = aluF2S(DryBuffer
[i
][BACK_CENTER
]);
1504 ((ALshort
*)buffer
)[5] = aluF2S(DryBuffer
[i
][SIDE_LEFT
]);
1505 ((ALshort
*)buffer
)[6] = aluF2S(DryBuffer
[i
][SIDE_RIGHT
]);
1506 buffer
= ((ALshort
*)buffer
) + 7;
1509 case AL_FORMAT_71CHN16
:
1510 for(i
= 0;i
< SamplesToDo
;i
++)
1512 ((ALshort
*)buffer
)[0] = aluF2S(DryBuffer
[i
][FRONT_LEFT
]);
1513 ((ALshort
*)buffer
)[1] = aluF2S(DryBuffer
[i
][FRONT_RIGHT
]);
1515 ((ALshort
*)buffer
)[2] = aluF2S(DryBuffer
[i
][FRONT_CENTER
]);
1516 ((ALshort
*)buffer
)[3] = aluF2S(DryBuffer
[i
][LFE
]);
1517 ((ALshort
*)buffer
)[4] = aluF2S(DryBuffer
[i
][BACK_LEFT
]);
1518 ((ALshort
*)buffer
)[5] = aluF2S(DryBuffer
[i
][BACK_RIGHT
]);
1520 ((ALshort
*)buffer
)[2] = aluF2S(DryBuffer
[i
][BACK_LEFT
]);
1521 ((ALshort
*)buffer
)[3] = aluF2S(DryBuffer
[i
][BACK_RIGHT
]);
1522 ((ALshort
*)buffer
)[4] = aluF2S(DryBuffer
[i
][FRONT_CENTER
]);
1523 ((ALshort
*)buffer
)[5] = aluF2S(DryBuffer
[i
][LFE
]);
1525 ((ALshort
*)buffer
)[6] = aluF2S(DryBuffer
[i
][SIDE_LEFT
]);
1526 ((ALshort
*)buffer
)[7] = aluF2S(DryBuffer
[i
][SIDE_RIGHT
]);
1527 buffer
= ((ALshort
*)buffer
) + 8;
1535 size
-= SamplesToDo
;
1538 #if defined(HAVE_FESETROUND)
1539 fesetround(fpuState
);
1540 #elif defined(HAVE__CONTROLFP)
1541 _controlfp(fpuState
, 0xfffff);
1544 ProcessContext(ALContext
);