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.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 * Or go to http://www.gnu.org/copyleft/lgpl.html
32 #include "alListener.h"
33 #include "alAuxEffectSlot.h"
37 #include "uhjfilter.h"
38 #include "static_assert.h"
40 #include "mixer_defs.h"
42 #include "backends/base.h"
52 ALfloat ConeScale
= 1.0f
;
54 /* Localized Z scalar for mono sources */
55 ALfloat ZScale
= 1.0f
;
57 extern inline ALfloat
minf(ALfloat a
, ALfloat b
);
58 extern inline ALfloat
maxf(ALfloat a
, ALfloat b
);
59 extern inline ALfloat
clampf(ALfloat val
, ALfloat min
, ALfloat max
);
61 extern inline ALdouble
mind(ALdouble a
, ALdouble b
);
62 extern inline ALdouble
maxd(ALdouble a
, ALdouble b
);
63 extern inline ALdouble
clampd(ALdouble val
, ALdouble min
, ALdouble max
);
65 extern inline ALuint
minu(ALuint a
, ALuint b
);
66 extern inline ALuint
maxu(ALuint a
, ALuint b
);
67 extern inline ALuint
clampu(ALuint val
, ALuint min
, ALuint max
);
69 extern inline ALint
mini(ALint a
, ALint b
);
70 extern inline ALint
maxi(ALint a
, ALint b
);
71 extern inline ALint
clampi(ALint val
, ALint min
, ALint max
);
73 extern inline ALint64
mini64(ALint64 a
, ALint64 b
);
74 extern inline ALint64
maxi64(ALint64 a
, ALint64 b
);
75 extern inline ALint64
clampi64(ALint64 val
, ALint64 min
, ALint64 max
);
77 extern inline ALuint64
minu64(ALuint64 a
, ALuint64 b
);
78 extern inline ALuint64
maxu64(ALuint64 a
, ALuint64 b
);
79 extern inline ALuint64
clampu64(ALuint64 val
, ALuint64 min
, ALuint64 max
);
81 extern inline ALfloat
lerp(ALfloat val1
, ALfloat val2
, ALfloat mu
);
82 extern inline ALfloat
resample_fir4(ALfloat val0
, ALfloat val1
, ALfloat val2
, ALfloat val3
, ALuint frac
);
83 extern inline ALfloat
resample_fir8(ALfloat val0
, ALfloat val1
, ALfloat val2
, ALfloat val3
, ALfloat val4
, ALfloat val5
, ALfloat val6
, ALfloat val7
, ALuint frac
);
85 extern inline void aluVectorSet(aluVector
*restrict vector
, ALfloat x
, ALfloat y
, ALfloat z
, ALfloat w
);
87 extern inline void aluMatrixfSetRow(aluMatrixf
*matrix
, ALuint row
,
88 ALfloat m0
, ALfloat m1
, ALfloat m2
, ALfloat m3
);
89 extern inline void aluMatrixfSet(aluMatrixf
*matrix
,
90 ALfloat m00
, ALfloat m01
, ALfloat m02
, ALfloat m03
,
91 ALfloat m10
, ALfloat m11
, ALfloat m12
, ALfloat m13
,
92 ALfloat m20
, ALfloat m21
, ALfloat m22
, ALfloat m23
,
93 ALfloat m30
, ALfloat m31
, ALfloat m32
, ALfloat m33
);
95 extern inline void aluMatrixdSetRow(aluMatrixd
*matrix
, ALuint row
,
96 ALdouble m0
, ALdouble m1
, ALdouble m2
, ALdouble m3
);
97 extern inline void aluMatrixdSet(aluMatrixd
*matrix
,
98 ALdouble m00
, ALdouble m01
, ALdouble m02
, ALdouble m03
,
99 ALdouble m10
, ALdouble m11
, ALdouble m12
, ALdouble m13
,
100 ALdouble m20
, ALdouble m21
, ALdouble m22
, ALdouble m23
,
101 ALdouble m30
, ALdouble m31
, ALdouble m32
, ALdouble m33
);
104 static inline HrtfMixerFunc
SelectHrtfMixer(void)
107 if((CPUCapFlags
&CPU_CAP_SSE
))
111 if((CPUCapFlags
&CPU_CAP_NEON
))
119 static inline void aluCrossproduct(const ALfloat
*inVector1
, const ALfloat
*inVector2
, ALfloat
*outVector
)
121 outVector
[0] = inVector1
[1]*inVector2
[2] - inVector1
[2]*inVector2
[1];
122 outVector
[1] = inVector1
[2]*inVector2
[0] - inVector1
[0]*inVector2
[2];
123 outVector
[2] = inVector1
[0]*inVector2
[1] - inVector1
[1]*inVector2
[0];
126 static inline ALfloat
aluDotproduct(const aluVector
*vec1
, const aluVector
*vec2
)
128 return vec1
->v
[0]*vec2
->v
[0] + vec1
->v
[1]*vec2
->v
[1] + vec1
->v
[2]*vec2
->v
[2];
131 static inline ALfloat
aluNormalize(ALfloat
*vec
)
133 ALfloat length
= sqrtf(vec
[0]*vec
[0] + vec
[1]*vec
[1] + vec
[2]*vec
[2]);
136 ALfloat inv_length
= 1.0f
/length
;
137 vec
[0] *= inv_length
;
138 vec
[1] *= inv_length
;
139 vec
[2] *= inv_length
;
145 static inline void aluCrossproductd(const ALdouble
*inVector1
, const ALdouble
*inVector2
, ALdouble
*outVector
)
147 outVector
[0] = inVector1
[1]*inVector2
[2] - inVector1
[2]*inVector2
[1];
148 outVector
[1] = inVector1
[2]*inVector2
[0] - inVector1
[0]*inVector2
[2];
149 outVector
[2] = inVector1
[0]*inVector2
[1] - inVector1
[1]*inVector2
[0];
152 static inline ALdouble
aluNormalized(ALdouble
*vec
)
154 ALdouble length
= sqrt(vec
[0]*vec
[0] + vec
[1]*vec
[1] + vec
[2]*vec
[2]);
157 ALdouble inv_length
= 1.0/length
;
158 vec
[0] *= inv_length
;
159 vec
[1] *= inv_length
;
160 vec
[2] *= inv_length
;
165 static inline ALvoid
aluMatrixdFloat3(ALfloat
*vec
, ALfloat w
, const aluMatrixd
*mtx
)
167 ALdouble v
[4] = { vec
[0], vec
[1], vec
[2], w
};
169 vec
[0] = (ALfloat
)(v
[0]*mtx
->m
[0][0] + v
[1]*mtx
->m
[1][0] + v
[2]*mtx
->m
[2][0] + v
[3]*mtx
->m
[3][0]);
170 vec
[1] = (ALfloat
)(v
[0]*mtx
->m
[0][1] + v
[1]*mtx
->m
[1][1] + v
[2]*mtx
->m
[2][1] + v
[3]*mtx
->m
[3][1]);
171 vec
[2] = (ALfloat
)(v
[0]*mtx
->m
[0][2] + v
[1]*mtx
->m
[1][2] + v
[2]*mtx
->m
[2][2] + v
[3]*mtx
->m
[3][2]);
174 static inline ALvoid
aluMatrixdDouble3(ALdouble
*vec
, ALdouble w
, const aluMatrixd
*mtx
)
176 ALdouble v
[4] = { vec
[0], vec
[1], vec
[2], w
};
178 vec
[0] = v
[0]*mtx
->m
[0][0] + v
[1]*mtx
->m
[1][0] + v
[2]*mtx
->m
[2][0] + v
[3]*mtx
->m
[3][0];
179 vec
[1] = v
[0]*mtx
->m
[0][1] + v
[1]*mtx
->m
[1][1] + v
[2]*mtx
->m
[2][1] + v
[3]*mtx
->m
[3][1];
180 vec
[2] = v
[0]*mtx
->m
[0][2] + v
[1]*mtx
->m
[1][2] + v
[2]*mtx
->m
[2][2] + v
[3]*mtx
->m
[3][2];
183 static inline aluVector
aluMatrixdVector(const aluMatrixd
*mtx
, const aluVector
*vec
)
186 v
.v
[0] = (ALfloat
)(vec
->v
[0]*mtx
->m
[0][0] + vec
->v
[1]*mtx
->m
[1][0] + vec
->v
[2]*mtx
->m
[2][0] + vec
->v
[3]*mtx
->m
[3][0]);
187 v
.v
[1] = (ALfloat
)(vec
->v
[0]*mtx
->m
[0][1] + vec
->v
[1]*mtx
->m
[1][1] + vec
->v
[2]*mtx
->m
[2][1] + vec
->v
[3]*mtx
->m
[3][1]);
188 v
.v
[2] = (ALfloat
)(vec
->v
[0]*mtx
->m
[0][2] + vec
->v
[1]*mtx
->m
[1][2] + vec
->v
[2]*mtx
->m
[2][2] + vec
->v
[3]*mtx
->m
[3][2]);
189 v
.v
[3] = (ALfloat
)(vec
->v
[0]*mtx
->m
[0][3] + vec
->v
[1]*mtx
->m
[1][3] + vec
->v
[2]*mtx
->m
[2][3] + vec
->v
[3]*mtx
->m
[3][3]);
194 /* Prepares the interpolator for a given rate (determined by increment). A
195 * result of AL_FALSE indicates that the filter output will completely cut
198 * With a bit of work, and a trade of memory for CPU cost, this could be
199 * modified for use with an interpolated increment for buttery-smooth pitch
202 static ALboolean
BsincPrepare(const ALuint increment
, BsincState
*state
)
204 static const ALfloat scaleBase
= 1.510578918e-01f
, scaleRange
= 1.177936623e+00f
;
205 static const ALuint m
[BSINC_SCALE_COUNT
] = { 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 16, 16, 16, 12, 12, 12 };
206 static const ALuint to
[4][BSINC_SCALE_COUNT
] =
208 { 0, 24, 408, 792, 1176, 1560, 1944, 2328, 2648, 2968, 3288, 3544, 3800, 4056, 4248, 4440 },
209 { 4632, 5016, 5400, 5784, 6168, 6552, 6936, 7320, 7640, 7960, 8280, 8536, 8792, 9048, 9240, 0 },
210 { 0, 9432, 9816, 10200, 10584, 10968, 11352, 11736, 12056, 12376, 12696, 12952, 13208, 13464, 13656, 13848 },
211 { 14040, 14424, 14808, 15192, 15576, 15960, 16344, 16728, 17048, 17368, 17688, 17944, 18200, 18456, 18648, 0 }
213 static const ALuint tm
[2][BSINC_SCALE_COUNT
] =
215 { 0, 24, 24, 24, 24, 24, 24, 20, 20, 20, 16, 16, 16, 12, 12, 12 },
216 { 24, 24, 24, 24, 24, 24, 24, 20, 20, 20, 16, 16, 16, 12, 12, 0 }
220 ALboolean uncut
= AL_TRUE
;
222 if(increment
> FRACTIONONE
)
224 sf
= (ALfloat
)FRACTIONONE
/ increment
;
227 /* Signal has been completely cut. The return result can be used
228 * to skip the filter (and output zeros) as an optimization.
236 sf
= (BSINC_SCALE_COUNT
- 1) * (sf
- scaleBase
) * scaleRange
;
238 /* The interpolation factor is fit to this diagonally-symmetric
239 * curve to reduce the transition ripple caused by interpolating
240 * different scales of the sinc function.
242 sf
= 1.0f
- cosf(asinf(sf
- si
));
248 si
= BSINC_SCALE_COUNT
- 1;
253 state
->l
= -(ALint
)((m
[si
] / 2) - 1);
254 /* The CPU cost of this table re-mapping could be traded for the memory
255 * cost of a complete table map (1024 elements large).
257 for(pi
= 0;pi
< BSINC_PHASE_COUNT
;pi
++)
259 state
->coeffs
[pi
].filter
= &bsincTab
[to
[0][si
] + tm
[0][si
]*pi
];
260 state
->coeffs
[pi
].scDelta
= &bsincTab
[to
[1][si
] + tm
[1][si
]*pi
];
261 state
->coeffs
[pi
].phDelta
= &bsincTab
[to
[2][si
] + tm
[0][si
]*pi
];
262 state
->coeffs
[pi
].spDelta
= &bsincTab
[to
[3][si
] + tm
[1][si
]*pi
];
268 static ALvoid
CalcListenerParams(ALlistener
*Listener
)
270 ALdouble N
[3], V
[3], U
[3], P
[3];
273 N
[0] = Listener
->Forward
[0];
274 N
[1] = Listener
->Forward
[1];
275 N
[2] = Listener
->Forward
[2];
277 V
[0] = Listener
->Up
[0];
278 V
[1] = Listener
->Up
[1];
279 V
[2] = Listener
->Up
[2];
281 /* Build and normalize right-vector */
282 aluCrossproductd(N
, V
, U
);
285 aluMatrixdSet(&Listener
->Params
.Matrix
,
286 U
[0], V
[0], -N
[0], 0.0,
287 U
[1], V
[1], -N
[1], 0.0,
288 U
[2], V
[2], -N
[2], 0.0,
292 P
[0] = Listener
->Position
.v
[0];
293 P
[1] = Listener
->Position
.v
[1];
294 P
[2] = Listener
->Position
.v
[2];
295 aluMatrixdDouble3(P
, 1.0, &Listener
->Params
.Matrix
);
296 aluMatrixdSetRow(&Listener
->Params
.Matrix
, 3, -P
[0], -P
[1], -P
[2], 1.0f
);
298 Listener
->Params
.Velocity
= aluMatrixdVector(&Listener
->Params
.Matrix
, &Listener
->Velocity
);
301 ALvoid
CalcNonAttnSourceParams(ALvoice
*voice
, const ALsource
*ALSource
, const ALCcontext
*ALContext
)
303 static const struct ChanMap MonoMap
[1] = {
304 { FrontCenter
, 0.0f
, 0.0f
}
306 { FrontLeft
, DEG2RAD(-30.0f
), DEG2RAD(0.0f
) },
307 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
) }
309 { BackLeft
, DEG2RAD(-150.0f
), DEG2RAD(0.0f
) },
310 { BackRight
, DEG2RAD( 150.0f
), DEG2RAD(0.0f
) }
312 { FrontLeft
, DEG2RAD( -45.0f
), DEG2RAD(0.0f
) },
313 { FrontRight
, DEG2RAD( 45.0f
), DEG2RAD(0.0f
) },
314 { BackLeft
, DEG2RAD(-135.0f
), DEG2RAD(0.0f
) },
315 { BackRight
, DEG2RAD( 135.0f
), DEG2RAD(0.0f
) }
317 { FrontLeft
, DEG2RAD( -30.0f
), DEG2RAD(0.0f
) },
318 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
) },
319 { FrontCenter
, DEG2RAD( 0.0f
), DEG2RAD(0.0f
) },
321 { SideLeft
, DEG2RAD(-110.0f
), DEG2RAD(0.0f
) },
322 { SideRight
, DEG2RAD( 110.0f
), DEG2RAD(0.0f
) }
324 { FrontLeft
, DEG2RAD(-30.0f
), DEG2RAD(0.0f
) },
325 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
) },
326 { FrontCenter
, DEG2RAD( 0.0f
), DEG2RAD(0.0f
) },
328 { BackCenter
, DEG2RAD(180.0f
), DEG2RAD(0.0f
) },
329 { SideLeft
, DEG2RAD(-90.0f
), DEG2RAD(0.0f
) },
330 { SideRight
, DEG2RAD( 90.0f
), DEG2RAD(0.0f
) }
332 { FrontLeft
, DEG2RAD( -30.0f
), DEG2RAD(0.0f
) },
333 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
) },
334 { FrontCenter
, DEG2RAD( 0.0f
), DEG2RAD(0.0f
) },
336 { BackLeft
, DEG2RAD(-150.0f
), DEG2RAD(0.0f
) },
337 { BackRight
, DEG2RAD( 150.0f
), DEG2RAD(0.0f
) },
338 { SideLeft
, DEG2RAD( -90.0f
), DEG2RAD(0.0f
) },
339 { SideRight
, DEG2RAD( 90.0f
), DEG2RAD(0.0f
) }
342 const ALCdevice
*Device
= ALContext
->Device
;
343 ALfloat SourceVolume
,ListenerGain
,MinVolume
,MaxVolume
;
344 ALbufferlistitem
*BufferListItem
;
345 enum FmtChannels Channels
;
346 ALfloat DryGain
, DryGainHF
, DryGainLF
;
347 ALfloat WetGain
[MAX_SENDS
];
348 ALfloat WetGainHF
[MAX_SENDS
];
349 ALfloat WetGainLF
[MAX_SENDS
];
350 ALeffectslot
*SendSlots
[MAX_SENDS
];
351 ALuint NumSends
, Frequency
;
353 const struct ChanMap
*chans
= NULL
;
354 ALuint num_channels
= 0;
355 ALboolean DirectChannels
;
356 ALboolean isbformat
= AL_FALSE
;
360 /* Get device properties */
361 NumSends
= Device
->NumAuxSends
;
362 Frequency
= Device
->Frequency
;
364 /* Get listener properties */
365 ListenerGain
= ALContext
->Listener
->Gain
;
367 /* Get source properties */
368 SourceVolume
= ALSource
->Gain
;
369 MinVolume
= ALSource
->MinGain
;
370 MaxVolume
= ALSource
->MaxGain
;
371 Pitch
= ALSource
->Pitch
;
372 Relative
= ALSource
->HeadRelative
;
373 DirectChannels
= ALSource
->DirectChannels
;
375 voice
->Direct
.OutBuffer
= Device
->Dry
.Buffer
;
376 voice
->Direct
.OutChannels
= Device
->Dry
.NumChannels
;
377 for(i
= 0;i
< NumSends
;i
++)
379 SendSlots
[i
] = ALSource
->Send
[i
].Slot
;
380 if(!SendSlots
[i
] && i
== 0)
381 SendSlots
[i
] = Device
->DefaultSlot
;
382 if(!SendSlots
[i
] || SendSlots
[i
]->EffectType
== AL_EFFECT_NULL
)
385 voice
->Send
[i
].OutBuffer
= NULL
;
386 voice
->Send
[i
].OutChannels
= 0;
390 voice
->Send
[i
].OutBuffer
= SendSlots
[i
]->WetBuffer
;
391 voice
->Send
[i
].OutChannels
= SendSlots
[i
]->NumChannels
;
395 /* Calculate the stepping value */
397 BufferListItem
= ATOMIC_LOAD(&ALSource
->queue
);
398 while(BufferListItem
!= NULL
)
401 if((ALBuffer
=BufferListItem
->buffer
) != NULL
)
403 Pitch
= Pitch
* ALBuffer
->Frequency
/ Frequency
;
404 if(Pitch
> (ALfloat
)MAX_PITCH
)
405 voice
->Step
= MAX_PITCH
<<FRACTIONBITS
;
407 voice
->Step
= maxi(fastf2i(Pitch
*FRACTIONONE
+ 0.5f
), 1);
408 BsincPrepare(voice
->Step
, &voice
->SincState
);
410 Channels
= ALBuffer
->FmtChannels
;
413 BufferListItem
= BufferListItem
->next
;
416 /* Calculate gains */
417 DryGain
= clampf(SourceVolume
, MinVolume
, MaxVolume
);
418 DryGain
*= ALSource
->Direct
.Gain
* ListenerGain
;
419 DryGainHF
= ALSource
->Direct
.GainHF
;
420 DryGainLF
= ALSource
->Direct
.GainLF
;
421 for(i
= 0;i
< NumSends
;i
++)
423 WetGain
[i
] = clampf(SourceVolume
, MinVolume
, MaxVolume
);
424 WetGain
[i
] *= ALSource
->Send
[i
].Gain
* ListenerGain
;
425 WetGainHF
[i
] = ALSource
->Send
[i
].GainHF
;
426 WetGainLF
[i
] = ALSource
->Send
[i
].GainLF
;
469 DirectChannels
= AL_FALSE
;
475 DirectChannels
= AL_FALSE
;
481 ALfloat N
[3], V
[3], U
[3];
486 N
[0] = ALSource
->Orientation
[0][0];
487 N
[1] = ALSource
->Orientation
[0][1];
488 N
[2] = ALSource
->Orientation
[0][2];
490 V
[0] = ALSource
->Orientation
[1][0];
491 V
[1] = ALSource
->Orientation
[1][1];
492 V
[2] = ALSource
->Orientation
[1][2];
496 const aluMatrixd
*lmatrix
= &ALContext
->Listener
->Params
.Matrix
;
497 aluMatrixdFloat3(N
, 0.0f
, lmatrix
);
498 aluMatrixdFloat3(V
, 0.0f
, lmatrix
);
500 /* Build and normalize right-vector */
501 aluCrossproduct(N
, V
, U
);
504 /* Build a rotate + conversion matrix (B-Format -> N3D), and include
505 * scaling for first-order content on second- or third-order output.
507 scale
= Device
->Dry
.AmbiScale
* 1.732050808f
;
508 aluMatrixfSet(&matrix
,
509 1.414213562f
, 0.0f
, 0.0f
, 0.0f
,
510 0.0f
, -N
[0]*scale
, N
[1]*scale
, -N
[2]*scale
,
511 0.0f
, U
[0]*scale
, -U
[1]*scale
, U
[2]*scale
,
512 0.0f
, -V
[0]*scale
, V
[1]*scale
, -V
[2]*scale
515 for(c
= 0;c
< num_channels
;c
++)
516 ComputeFirstOrderGains(Device
->Dry
.AmbiCoeffs
, Device
->Dry
.NumChannels
, matrix
.m
[c
],
517 DryGain
, voice
->Direct
.Gains
[c
].Target
);
519 /* Rebuild the matrix, without the second- or third-order output
520 * scaling (effects take first-order content, and will do the scaling
521 * themselves when mixing to the output).
523 scale
= 1.732050808f
;
524 aluMatrixfSetRow(&matrix
, 1, 0.0f
, -N
[0]*scale
, N
[1]*scale
, -N
[2]*scale
);
525 aluMatrixfSetRow(&matrix
, 2, 0.0f
, U
[0]*scale
, -U
[1]*scale
, U
[2]*scale
);
526 aluMatrixfSetRow(&matrix
, 3, 0.0f
, -V
[0]*scale
, V
[1]*scale
, -V
[2]*scale
);
527 for(i
= 0;i
< NumSends
;i
++)
531 for(c
= 0;c
< num_channels
;c
++)
533 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
534 voice
->Send
[i
].Gains
[c
].Target
[j
] = 0.0f
;
539 for(c
= 0;c
< num_channels
;c
++)
541 const ALeffectslot
*Slot
= SendSlots
[i
];
542 ComputeFirstOrderGains(Slot
->AmbiCoeffs
, Slot
->NumChannels
, matrix
.m
[c
],
543 WetGain
[i
], voice
->Send
[i
].Gains
[c
].Target
);
548 voice
->IsHrtf
= AL_FALSE
;
552 ALfloat coeffs
[MAX_AMBI_COEFFS
];
556 if(Device
->Hrtf
|| Device
->Uhj_Encoder
)
558 /* DirectChannels with HRTF or UHJ enabled. Skip the virtual
559 * channels and write FrontLeft and FrontRight inputs to the
560 * first and second outputs.
562 voice
->Direct
.OutBuffer
= Device
->RealOut
.Buffer
;
563 voice
->Direct
.OutChannels
= Device
->RealOut
.NumChannels
;
564 for(c
= 0;c
< num_channels
;c
++)
566 for(j
= 0;j
< MAX_OUTPUT_CHANNELS
;j
++)
567 voice
->Direct
.Gains
[c
].Target
[j
] = 0.0f
;
568 for(j
= 0;j
< Device
->RealOut
.NumChannels
;j
++)
570 if(chans
[c
].channel
== Device
->RealOut
.ChannelName
[j
])
572 voice
->Direct
.Gains
[c
].Target
[j
] = DryGain
;
578 else for(c
= 0;c
< num_channels
;c
++)
581 for(j
= 0;j
< MAX_OUTPUT_CHANNELS
;j
++)
582 voice
->Direct
.Gains
[c
].Target
[j
] = 0.0f
;
583 if((idx
=GetChannelIdxByName(Device
, chans
[c
].channel
)) != -1)
584 voice
->Direct
.Gains
[c
].Target
[idx
] = DryGain
;
587 /* Auxiliary sends still use normal panning since they mix to B-Format, which can't
589 for(c
= 0;c
< num_channels
;c
++)
591 CalcAngleCoeffs(chans
[c
].angle
, chans
[c
].elevation
, coeffs
);
593 for(i
= 0;i
< NumSends
;i
++)
597 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
598 voice
->Send
[i
].Gains
[c
].Target
[j
] = 0.0f
;
602 const ALeffectslot
*Slot
= SendSlots
[i
];
603 ComputePanningGains(Slot
->AmbiCoeffs
, Slot
->NumChannels
, coeffs
,
604 WetGain
[i
], voice
->Send
[i
].Gains
[c
].Target
);
609 voice
->IsHrtf
= AL_FALSE
;
611 else if(Device
->Render_Mode
== HrtfRender
)
613 /* Full HRTF rendering. Skip the virtual channels and render each
614 * input channel to the real outputs.
616 voice
->Direct
.OutBuffer
= Device
->RealOut
.Buffer
;
617 voice
->Direct
.OutChannels
= Device
->RealOut
.NumChannels
;
618 for(c
= 0;c
< num_channels
;c
++)
620 if(chans
[c
].channel
== LFE
)
623 voice
->Direct
.Hrtf
[c
].Target
.Delay
[0] = 0;
624 voice
->Direct
.Hrtf
[c
].Target
.Delay
[1] = 0;
625 for(i
= 0;i
< HRIR_LENGTH
;i
++)
627 voice
->Direct
.Hrtf
[c
].Target
.Coeffs
[i
][0] = 0.0f
;
628 voice
->Direct
.Hrtf
[c
].Target
.Coeffs
[i
][1] = 0.0f
;
631 for(i
= 0;i
< NumSends
;i
++)
633 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
634 voice
->Send
[i
].Gains
[c
].Target
[j
] = 0.0f
;
640 /* Get the static HRIR coefficients and delays for this channel. */
641 GetLerpedHrtfCoeffs(Device
->Hrtf
,
642 chans
[c
].elevation
, chans
[c
].angle
, 1.0f
, DryGain
,
643 voice
->Direct
.Hrtf
[c
].Target
.Coeffs
,
644 voice
->Direct
.Hrtf
[c
].Target
.Delay
647 /* Normal panning for auxiliary sends. */
648 CalcAngleCoeffs(chans
[c
].angle
, chans
[c
].elevation
, coeffs
);
650 for(i
= 0;i
< NumSends
;i
++)
654 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
655 voice
->Send
[i
].Gains
[c
].Target
[j
] = 0.0f
;
659 const ALeffectslot
*Slot
= SendSlots
[i
];
660 ComputePanningGains(Slot
->AmbiCoeffs
, Slot
->NumChannels
, coeffs
,
661 WetGain
[i
], voice
->Send
[i
].Gains
[c
].Target
);
666 voice
->IsHrtf
= AL_TRUE
;
670 /* Non-HRTF rendering. Use normal panning to the output. */
671 for(c
= 0;c
< num_channels
;c
++)
673 /* Special-case LFE */
674 if(chans
[c
].channel
== LFE
)
677 for(j
= 0;j
< MAX_OUTPUT_CHANNELS
;j
++)
678 voice
->Direct
.Gains
[c
].Target
[j
] = 0.0f
;
679 if((idx
=GetChannelIdxByName(Device
, chans
[c
].channel
)) != -1)
680 voice
->Direct
.Gains
[c
].Target
[idx
] = DryGain
;
682 for(i
= 0;i
< NumSends
;i
++)
685 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
686 voice
->Send
[i
].Gains
[c
].Target
[j
] = 0.0f
;
691 if(Device
->Render_Mode
== StereoPair
)
693 /* Clamp X so it remains within 30 degrees of 0 or 180 degree azimuth. */
694 ALfloat x
= sinf(chans
[c
].angle
) * cosf(chans
[c
].elevation
);
695 coeffs
[0] = clampf(-x
, -0.5f
, 0.5f
) + 0.5;
696 voice
->Direct
.Gains
[c
].Target
[0] = coeffs
[0] * DryGain
;
697 voice
->Direct
.Gains
[c
].Target
[1] = (1.0f
-coeffs
[0]) * DryGain
;
698 for(j
= 2;j
< MAX_OUTPUT_CHANNELS
;j
++)
699 voice
->Direct
.Gains
[c
].Target
[j
] = 0.0f
;
701 CalcAngleCoeffs(chans
[c
].angle
, chans
[c
].elevation
, coeffs
);
705 CalcAngleCoeffs(chans
[c
].angle
, chans
[c
].elevation
, coeffs
);
706 ComputePanningGains(Device
->Dry
.AmbiCoeffs
, Device
->Dry
.NumChannels
, coeffs
,
707 DryGain
, voice
->Direct
.Gains
[c
].Target
);
710 for(i
= 0;i
< NumSends
;i
++)
715 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
716 voice
->Send
[i
].Gains
[c
].Target
[j
] = 0.0f
;
720 const ALeffectslot
*Slot
= SendSlots
[i
];
721 ComputePanningGains(Slot
->AmbiCoeffs
, Slot
->NumChannels
, coeffs
,
722 WetGain
[i
], voice
->Send
[i
].Gains
[c
].Target
);
727 voice
->IsHrtf
= AL_FALSE
;
732 ALfloat hfscale
= ALSource
->Direct
.HFReference
/ Frequency
;
733 ALfloat lfscale
= ALSource
->Direct
.LFReference
/ Frequency
;
734 DryGainHF
= maxf(DryGainHF
, 0.0001f
);
735 DryGainLF
= maxf(DryGainLF
, 0.0001f
);
736 for(c
= 0;c
< num_channels
;c
++)
738 voice
->Direct
.Filters
[c
].ActiveType
= AF_None
;
739 if(DryGainHF
!= 1.0f
) voice
->Direct
.Filters
[c
].ActiveType
|= AF_LowPass
;
740 if(DryGainLF
!= 1.0f
) voice
->Direct
.Filters
[c
].ActiveType
|= AF_HighPass
;
741 ALfilterState_setParams(
742 &voice
->Direct
.Filters
[c
].LowPass
, ALfilterType_HighShelf
,
743 DryGainHF
, hfscale
, calc_rcpQ_from_slope(DryGainHF
, 0.75f
)
745 ALfilterState_setParams(
746 &voice
->Direct
.Filters
[c
].HighPass
, ALfilterType_LowShelf
,
747 DryGainLF
, lfscale
, calc_rcpQ_from_slope(DryGainLF
, 0.75f
)
751 for(i
= 0;i
< NumSends
;i
++)
753 ALfloat hfscale
= ALSource
->Send
[i
].HFReference
/ Frequency
;
754 ALfloat lfscale
= ALSource
->Send
[i
].LFReference
/ Frequency
;
755 WetGainHF
[i
] = maxf(WetGainHF
[i
], 0.0001f
);
756 WetGainLF
[i
] = maxf(WetGainLF
[i
], 0.0001f
);
757 for(c
= 0;c
< num_channels
;c
++)
759 voice
->Send
[i
].Filters
[c
].ActiveType
= AF_None
;
760 if(WetGainHF
[i
] != 1.0f
) voice
->Send
[i
].Filters
[c
].ActiveType
|= AF_LowPass
;
761 if(WetGainLF
[i
] != 1.0f
) voice
->Send
[i
].Filters
[c
].ActiveType
|= AF_HighPass
;
762 ALfilterState_setParams(
763 &voice
->Send
[i
].Filters
[c
].LowPass
, ALfilterType_HighShelf
,
764 WetGainHF
[i
], hfscale
, calc_rcpQ_from_slope(WetGainHF
[i
], 0.75f
)
766 ALfilterState_setParams(
767 &voice
->Send
[i
].Filters
[c
].HighPass
, ALfilterType_LowShelf
,
768 WetGainLF
[i
], lfscale
, calc_rcpQ_from_slope(WetGainLF
[i
], 0.75f
)
774 ALvoid
CalcSourceParams(ALvoice
*voice
, const ALsource
*ALSource
, const ALCcontext
*ALContext
)
776 const ALCdevice
*Device
= ALContext
->Device
;
777 aluVector Position
, Velocity
, Direction
, SourceToListener
;
778 ALfloat InnerAngle
,OuterAngle
,Angle
,Distance
,ClampedDist
;
779 ALfloat MinVolume
,MaxVolume
,MinDist
,MaxDist
,Rolloff
;
780 ALfloat ConeVolume
,ConeHF
,SourceVolume
,ListenerGain
;
781 ALfloat DopplerFactor
, SpeedOfSound
;
782 ALfloat AirAbsorptionFactor
;
783 ALfloat RoomAirAbsorption
[MAX_SENDS
];
784 ALbufferlistitem
*BufferListItem
;
785 ALeffectslot
*SendSlots
[MAX_SENDS
];
787 ALfloat RoomAttenuation
[MAX_SENDS
];
788 ALfloat MetersPerUnit
;
789 ALfloat RoomRolloffBase
;
790 ALfloat RoomRolloff
[MAX_SENDS
];
791 ALfloat DecayDistance
[MAX_SENDS
];
795 ALboolean DryGainHFAuto
;
796 ALfloat WetGain
[MAX_SENDS
];
797 ALfloat WetGainHF
[MAX_SENDS
];
798 ALfloat WetGainLF
[MAX_SENDS
];
799 ALboolean WetGainAuto
;
800 ALboolean WetGainHFAuto
;
808 for(i
= 0;i
< MAX_SENDS
;i
++)
814 /* Get context/device properties */
815 DopplerFactor
= ALContext
->DopplerFactor
* ALSource
->DopplerFactor
;
816 SpeedOfSound
= ALContext
->SpeedOfSound
* ALContext
->DopplerVelocity
;
817 NumSends
= Device
->NumAuxSends
;
818 Frequency
= Device
->Frequency
;
820 /* Get listener properties */
821 ListenerGain
= ALContext
->Listener
->Gain
;
822 MetersPerUnit
= ALContext
->Listener
->MetersPerUnit
;
824 /* Get source properties */
825 SourceVolume
= ALSource
->Gain
;
826 MinVolume
= ALSource
->MinGain
;
827 MaxVolume
= ALSource
->MaxGain
;
828 Pitch
= ALSource
->Pitch
;
829 Position
= ALSource
->Position
;
830 Direction
= ALSource
->Direction
;
831 Velocity
= ALSource
->Velocity
;
832 MinDist
= ALSource
->RefDistance
;
833 MaxDist
= ALSource
->MaxDistance
;
834 Rolloff
= ALSource
->RollOffFactor
;
835 InnerAngle
= ALSource
->InnerAngle
;
836 OuterAngle
= ALSource
->OuterAngle
;
837 AirAbsorptionFactor
= ALSource
->AirAbsorptionFactor
;
838 DryGainHFAuto
= ALSource
->DryGainHFAuto
;
839 WetGainAuto
= ALSource
->WetGainAuto
;
840 WetGainHFAuto
= ALSource
->WetGainHFAuto
;
841 RoomRolloffBase
= ALSource
->RoomRolloffFactor
;
843 voice
->Direct
.OutBuffer
= Device
->Dry
.Buffer
;
844 voice
->Direct
.OutChannels
= Device
->Dry
.NumChannels
;
845 for(i
= 0;i
< NumSends
;i
++)
847 SendSlots
[i
] = ALSource
->Send
[i
].Slot
;
849 if(!SendSlots
[i
] && i
== 0)
850 SendSlots
[i
] = Device
->DefaultSlot
;
851 if(!SendSlots
[i
] || SendSlots
[i
]->EffectType
== AL_EFFECT_NULL
)
854 RoomRolloff
[i
] = 0.0f
;
855 DecayDistance
[i
] = 0.0f
;
856 RoomAirAbsorption
[i
] = 1.0f
;
858 else if(SendSlots
[i
]->AuxSendAuto
)
860 RoomRolloff
[i
] = RoomRolloffBase
;
861 if(IsReverbEffect(SendSlots
[i
]->EffectType
))
863 RoomRolloff
[i
] += SendSlots
[i
]->EffectProps
.Reverb
.RoomRolloffFactor
;
864 DecayDistance
[i
] = SendSlots
[i
]->EffectProps
.Reverb
.DecayTime
*
865 SPEEDOFSOUNDMETRESPERSEC
;
866 RoomAirAbsorption
[i
] = SendSlots
[i
]->EffectProps
.Reverb
.AirAbsorptionGainHF
;
870 DecayDistance
[i
] = 0.0f
;
871 RoomAirAbsorption
[i
] = 1.0f
;
876 /* If the slot's auxiliary send auto is off, the data sent to the
877 * effect slot is the same as the dry path, sans filter effects */
878 RoomRolloff
[i
] = Rolloff
;
879 DecayDistance
[i
] = 0.0f
;
880 RoomAirAbsorption
[i
] = AIRABSORBGAINHF
;
885 voice
->Send
[i
].OutBuffer
= NULL
;
886 voice
->Send
[i
].OutChannels
= 0;
890 voice
->Send
[i
].OutBuffer
= SendSlots
[i
]->WetBuffer
;
891 voice
->Send
[i
].OutChannels
= SendSlots
[i
]->NumChannels
;
895 /* Transform source to listener space (convert to head relative) */
896 if(ALSource
->HeadRelative
== AL_FALSE
)
898 const aluMatrixd
*Matrix
= &ALContext
->Listener
->Params
.Matrix
;
899 /* Transform source vectors */
900 Position
= aluMatrixdVector(Matrix
, &Position
);
901 Velocity
= aluMatrixdVector(Matrix
, &Velocity
);
902 Direction
= aluMatrixdVector(Matrix
, &Direction
);
906 const aluVector
*lvelocity
= &ALContext
->Listener
->Params
.Velocity
;
907 /* Offset the source velocity to be relative of the listener velocity */
908 Velocity
.v
[0] += lvelocity
->v
[0];
909 Velocity
.v
[1] += lvelocity
->v
[1];
910 Velocity
.v
[2] += lvelocity
->v
[2];
913 aluNormalize(Direction
.v
);
914 SourceToListener
.v
[0] = -Position
.v
[0];
915 SourceToListener
.v
[1] = -Position
.v
[1];
916 SourceToListener
.v
[2] = -Position
.v
[2];
917 SourceToListener
.v
[3] = 0.0f
;
918 Distance
= aluNormalize(SourceToListener
.v
);
920 /* Calculate distance attenuation */
921 ClampedDist
= Distance
;
924 for(i
= 0;i
< NumSends
;i
++)
925 RoomAttenuation
[i
] = 1.0f
;
926 switch(ALContext
->SourceDistanceModel
? ALSource
->DistanceModel
:
927 ALContext
->DistanceModel
)
929 case InverseDistanceClamped
:
930 ClampedDist
= clampf(ClampedDist
, MinDist
, MaxDist
);
931 if(MaxDist
< MinDist
)
934 case InverseDistance
:
937 ALfloat dist
= lerp(MinDist
, ClampedDist
, Rolloff
);
938 if(dist
> 0.0f
) Attenuation
= MinDist
/ dist
;
939 for(i
= 0;i
< NumSends
;i
++)
941 dist
= lerp(MinDist
, ClampedDist
, RoomRolloff
[i
]);
942 if(dist
> 0.0f
) RoomAttenuation
[i
] = MinDist
/ dist
;
947 case LinearDistanceClamped
:
948 ClampedDist
= clampf(ClampedDist
, MinDist
, MaxDist
);
949 if(MaxDist
< MinDist
)
953 if(MaxDist
!= MinDist
)
955 Attenuation
= 1.0f
- (Rolloff
*(ClampedDist
-MinDist
)/(MaxDist
- MinDist
));
956 Attenuation
= maxf(Attenuation
, 0.0f
);
957 for(i
= 0;i
< NumSends
;i
++)
959 RoomAttenuation
[i
] = 1.0f
- (RoomRolloff
[i
]*(ClampedDist
-MinDist
)/(MaxDist
- MinDist
));
960 RoomAttenuation
[i
] = maxf(RoomAttenuation
[i
], 0.0f
);
965 case ExponentDistanceClamped
:
966 ClampedDist
= clampf(ClampedDist
, MinDist
, MaxDist
);
967 if(MaxDist
< MinDist
)
970 case ExponentDistance
:
971 if(ClampedDist
> 0.0f
&& MinDist
> 0.0f
)
973 Attenuation
= powf(ClampedDist
/MinDist
, -Rolloff
);
974 for(i
= 0;i
< NumSends
;i
++)
975 RoomAttenuation
[i
] = powf(ClampedDist
/MinDist
, -RoomRolloff
[i
]);
979 case DisableDistance
:
980 ClampedDist
= MinDist
;
984 /* Source Gain + Attenuation */
985 DryGain
= SourceVolume
* Attenuation
;
986 for(i
= 0;i
< NumSends
;i
++)
987 WetGain
[i
] = SourceVolume
* RoomAttenuation
[i
];
989 /* Distance-based air absorption */
990 if(AirAbsorptionFactor
> 0.0f
&& ClampedDist
> MinDist
)
992 ALfloat meters
= (ClampedDist
-MinDist
) * MetersPerUnit
;
993 DryGainHF
*= powf(AIRABSORBGAINHF
, AirAbsorptionFactor
*meters
);
994 for(i
= 0;i
< NumSends
;i
++)
995 WetGainHF
[i
] *= powf(RoomAirAbsorption
[i
], AirAbsorptionFactor
*meters
);
1000 ALfloat ApparentDist
= 1.0f
/maxf(Attenuation
, 0.00001f
) - 1.0f
;
1002 /* Apply a decay-time transformation to the wet path, based on the
1003 * attenuation of the dry path.
1005 * Using the apparent distance, based on the distance attenuation, the
1006 * initial decay of the reverb effect is calculated and applied to the
1009 for(i
= 0;i
< NumSends
;i
++)
1011 if(DecayDistance
[i
] > 0.0f
)
1012 WetGain
[i
] *= powf(0.001f
/*-60dB*/, ApparentDist
/DecayDistance
[i
]);
1016 /* Calculate directional soundcones */
1017 Angle
= RAD2DEG(acosf(aluDotproduct(&Direction
, &SourceToListener
)) * ConeScale
) * 2.0f
;
1018 if(Angle
> InnerAngle
&& Angle
<= OuterAngle
)
1020 ALfloat scale
= (Angle
-InnerAngle
) / (OuterAngle
-InnerAngle
);
1021 ConeVolume
= lerp(1.0f
, ALSource
->OuterGain
, scale
);
1022 ConeHF
= lerp(1.0f
, ALSource
->OuterGainHF
, scale
);
1024 else if(Angle
> OuterAngle
)
1026 ConeVolume
= ALSource
->OuterGain
;
1027 ConeHF
= ALSource
->OuterGainHF
;
1035 DryGain
*= ConeVolume
;
1038 for(i
= 0;i
< NumSends
;i
++)
1039 WetGain
[i
] *= ConeVolume
;
1042 DryGainHF
*= ConeHF
;
1045 for(i
= 0;i
< NumSends
;i
++)
1046 WetGainHF
[i
] *= ConeHF
;
1049 /* Clamp to Min/Max Gain */
1050 DryGain
= clampf(DryGain
, MinVolume
, MaxVolume
);
1051 for(i
= 0;i
< NumSends
;i
++)
1052 WetGain
[i
] = clampf(WetGain
[i
], MinVolume
, MaxVolume
);
1054 /* Apply gain and frequency filters */
1055 DryGain
*= ALSource
->Direct
.Gain
* ListenerGain
;
1056 DryGainHF
*= ALSource
->Direct
.GainHF
;
1057 DryGainLF
*= ALSource
->Direct
.GainLF
;
1058 for(i
= 0;i
< NumSends
;i
++)
1060 WetGain
[i
] *= ALSource
->Send
[i
].Gain
* ListenerGain
;
1061 WetGainHF
[i
] *= ALSource
->Send
[i
].GainHF
;
1062 WetGainLF
[i
] *= ALSource
->Send
[i
].GainLF
;
1065 /* Calculate velocity-based doppler effect */
1066 if(DopplerFactor
> 0.0f
)
1068 const aluVector
*lvelocity
= &ALContext
->Listener
->Params
.Velocity
;
1071 if(SpeedOfSound
< 1.0f
)
1073 DopplerFactor
*= 1.0f
/SpeedOfSound
;
1074 SpeedOfSound
= 1.0f
;
1077 VSS
= aluDotproduct(&Velocity
, &SourceToListener
) * DopplerFactor
;
1078 VLS
= aluDotproduct(lvelocity
, &SourceToListener
) * DopplerFactor
;
1080 Pitch
*= clampf(SpeedOfSound
-VLS
, 1.0f
, SpeedOfSound
*2.0f
- 1.0f
) /
1081 clampf(SpeedOfSound
-VSS
, 1.0f
, SpeedOfSound
*2.0f
- 1.0f
);
1084 BufferListItem
= ATOMIC_LOAD(&ALSource
->queue
);
1085 while(BufferListItem
!= NULL
)
1088 if((ALBuffer
=BufferListItem
->buffer
) != NULL
)
1090 /* Calculate fixed-point stepping value, based on the pitch, buffer
1091 * frequency, and output frequency. */
1092 Pitch
= Pitch
* ALBuffer
->Frequency
/ Frequency
;
1093 if(Pitch
> (ALfloat
)MAX_PITCH
)
1094 voice
->Step
= MAX_PITCH
<<FRACTIONBITS
;
1096 voice
->Step
= maxi(fastf2i(Pitch
*FRACTIONONE
+ 0.5f
), 1);
1097 BsincPrepare(voice
->Step
, &voice
->SincState
);
1101 BufferListItem
= BufferListItem
->next
;
1104 if(Device
->Render_Mode
== HrtfRender
)
1106 /* Full HRTF rendering. Skip the virtual channels and render to the
1109 aluVector dir
= {{ 0.0f
, 0.0f
, -1.0f
, 0.0f
}};
1110 ALfloat ev
= 0.0f
, az
= 0.0f
;
1111 ALfloat radius
= ALSource
->Radius
;
1112 ALfloat dirfact
= 1.0f
;
1113 ALfloat coeffs
[MAX_AMBI_COEFFS
];
1115 voice
->Direct
.OutBuffer
= Device
->RealOut
.Buffer
;
1116 voice
->Direct
.OutChannels
= Device
->RealOut
.NumChannels
;
1118 if(Distance
> FLT_EPSILON
)
1120 dir
.v
[0] = -SourceToListener
.v
[0];
1121 dir
.v
[1] = -SourceToListener
.v
[1];
1122 dir
.v
[2] = -SourceToListener
.v
[2] * ZScale
;
1124 /* Calculate elevation and azimuth only when the source is not at
1125 * the listener. This prevents +0 and -0 Z from producing
1126 * inconsistent panning. Also, clamp Y in case FP precision errors
1127 * cause it to land outside of -1..+1. */
1128 ev
= asinf(clampf(dir
.v
[1], -1.0f
, 1.0f
));
1129 az
= atan2f(dir
.v
[0], -dir
.v
[2]);
1133 if(radius
>= Distance
)
1134 dirfact
*= Distance
/ radius
* 0.5f
;
1136 dirfact
*= 1.0f
- (asinf(radius
/ Distance
) / F_PI
);
1139 /* Get the HRIR coefficients and delays. */
1140 GetLerpedHrtfCoeffs(Device
->Hrtf
, ev
, az
, dirfact
, DryGain
,
1141 voice
->Direct
.Hrtf
[0].Target
.Coeffs
,
1142 voice
->Direct
.Hrtf
[0].Target
.Delay
);
1144 dir
.v
[0] *= dirfact
;
1145 dir
.v
[1] *= dirfact
;
1146 dir
.v
[2] *= dirfact
;
1147 CalcDirectionCoeffs(dir
.v
, coeffs
);
1149 for(i
= 0;i
< NumSends
;i
++)
1154 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
1155 voice
->Send
[i
].Gains
[0].Target
[j
] = 0.0f
;
1159 const ALeffectslot
*Slot
= SendSlots
[i
];
1160 ComputePanningGains(Slot
->AmbiCoeffs
, Slot
->NumChannels
, coeffs
,
1161 WetGain
[i
], voice
->Send
[i
].Gains
[0].Target
);
1165 voice
->IsHrtf
= AL_TRUE
;
1169 /* Non-HRTF rendering. */
1170 ALfloat dir
[3] = { 0.0f
, 0.0f
, -1.0f
};
1171 ALfloat radius
= ALSource
->Radius
;
1172 ALfloat coeffs
[MAX_AMBI_COEFFS
];
1174 /* Get the localized direction, and compute panned gains. */
1175 if(Distance
> FLT_EPSILON
)
1177 dir
[0] = -SourceToListener
.v
[0];
1178 dir
[1] = -SourceToListener
.v
[1];
1179 dir
[2] = -SourceToListener
.v
[2] * ZScale
;
1184 if(radius
>= Distance
)
1185 dirfact
= Distance
/ radius
* 0.5f
;
1187 dirfact
= 1.0f
- (asinf(radius
/ Distance
) / F_PI
);
1193 if(Device
->Render_Mode
== StereoPair
)
1195 /* Clamp X so it remains within 30 degrees of 0 or 180 degree azimuth. */
1196 coeffs
[0] = clampf(-dir
[0], -0.5f
, 0.5f
) + 0.5;
1197 voice
->Direct
.Gains
[0].Target
[0] = coeffs
[0] * DryGain
;
1198 voice
->Direct
.Gains
[0].Target
[1] = (1.0f
-coeffs
[0]) * DryGain
;
1199 for(i
= 2;i
< MAX_OUTPUT_CHANNELS
;i
++)
1200 voice
->Direct
.Gains
[0].Target
[i
] = 0.0f
;
1202 CalcDirectionCoeffs(dir
, coeffs
);
1206 CalcDirectionCoeffs(dir
, coeffs
);
1207 ComputePanningGains(Device
->Dry
.AmbiCoeffs
, Device
->Dry
.NumChannels
, coeffs
,
1208 DryGain
, voice
->Direct
.Gains
[0].Target
);
1211 for(i
= 0;i
< NumSends
;i
++)
1216 for(j
= 0;j
< MAX_EFFECT_CHANNELS
;j
++)
1217 voice
->Send
[i
].Gains
[0].Target
[j
] = 0.0f
;
1221 const ALeffectslot
*Slot
= SendSlots
[i
];
1222 ComputePanningGains(Slot
->AmbiCoeffs
, Slot
->NumChannels
, coeffs
,
1223 WetGain
[i
], voice
->Send
[i
].Gains
[0].Target
);
1227 voice
->IsHrtf
= AL_FALSE
;
1231 ALfloat hfscale
= ALSource
->Direct
.HFReference
/ Frequency
;
1232 ALfloat lfscale
= ALSource
->Direct
.LFReference
/ Frequency
;
1233 DryGainHF
= maxf(DryGainHF
, 0.0001f
);
1234 DryGainLF
= maxf(DryGainLF
, 0.0001f
);
1235 voice
->Direct
.Filters
[0].ActiveType
= AF_None
;
1236 if(DryGainHF
!= 1.0f
) voice
->Direct
.Filters
[0].ActiveType
|= AF_LowPass
;
1237 if(DryGainLF
!= 1.0f
) voice
->Direct
.Filters
[0].ActiveType
|= AF_HighPass
;
1238 ALfilterState_setParams(
1239 &voice
->Direct
.Filters
[0].LowPass
, ALfilterType_HighShelf
,
1240 DryGainHF
, hfscale
, calc_rcpQ_from_slope(DryGainHF
, 0.75f
)
1242 ALfilterState_setParams(
1243 &voice
->Direct
.Filters
[0].HighPass
, ALfilterType_LowShelf
,
1244 DryGainLF
, lfscale
, calc_rcpQ_from_slope(DryGainLF
, 0.75f
)
1247 for(i
= 0;i
< NumSends
;i
++)
1249 ALfloat hfscale
= ALSource
->Send
[i
].HFReference
/ Frequency
;
1250 ALfloat lfscale
= ALSource
->Send
[i
].LFReference
/ Frequency
;
1251 WetGainHF
[i
] = maxf(WetGainHF
[i
], 0.0001f
);
1252 WetGainLF
[i
] = maxf(WetGainLF
[i
], 0.0001f
);
1253 voice
->Send
[i
].Filters
[0].ActiveType
= AF_None
;
1254 if(WetGainHF
[i
] != 1.0f
) voice
->Send
[i
].Filters
[0].ActiveType
|= AF_LowPass
;
1255 if(WetGainLF
[i
] != 1.0f
) voice
->Send
[i
].Filters
[0].ActiveType
|= AF_HighPass
;
1256 ALfilterState_setParams(
1257 &voice
->Send
[i
].Filters
[0].LowPass
, ALfilterType_HighShelf
,
1258 WetGainHF
[i
], hfscale
, calc_rcpQ_from_slope(WetGainHF
[i
], 0.75f
)
1260 ALfilterState_setParams(
1261 &voice
->Send
[i
].Filters
[0].HighPass
, ALfilterType_LowShelf
,
1262 WetGainLF
[i
], lfscale
, calc_rcpQ_from_slope(WetGainLF
[i
], 0.75f
)
1268 void UpdateContextSources(ALCcontext
*ctx
)
1270 ALvoice
*voice
, *voice_end
;
1273 if(ATOMIC_EXCHANGE(ALenum
, &ctx
->UpdateSources
, AL_FALSE
))
1275 CalcListenerParams(ctx
->Listener
);
1277 voice
= ctx
->Voices
;
1278 voice_end
= voice
+ ctx
->VoiceCount
;
1279 for(;voice
!= voice_end
;++voice
)
1281 if(!(source
=voice
->Source
)) continue;
1282 if(source
->state
!= AL_PLAYING
&& source
->state
!= AL_PAUSED
)
1283 voice
->Source
= NULL
;
1286 ATOMIC_STORE(&source
->NeedsUpdate
, AL_FALSE
);
1287 voice
->Update(voice
, source
, ctx
);
1293 voice
= ctx
->Voices
;
1294 voice_end
= voice
+ ctx
->VoiceCount
;
1295 for(;voice
!= voice_end
;++voice
)
1297 if(!(source
=voice
->Source
)) continue;
1298 if(source
->state
!= AL_PLAYING
&& source
->state
!= AL_PAUSED
)
1299 voice
->Source
= NULL
;
1300 else if(ATOMIC_EXCHANGE(ALenum
, &source
->NeedsUpdate
, AL_FALSE
))
1301 voice
->Update(voice
, source
, ctx
);
1307 /* Specialized function to clamp to [-1, +1] with only one branch. This also
1308 * converts NaN to 0. */
1309 static inline ALfloat
aluClampf(ALfloat val
)
1311 if(fabsf(val
) <= 1.0f
) return val
;
1312 return (ALfloat
)((0.0f
< val
) - (val
< 0.0f
));
1315 static inline ALfloat
aluF2F(ALfloat val
)
1318 static inline ALint
aluF2I(ALfloat val
)
1320 /* Floats only have a 24-bit mantissa, so [-16777215, +16777215] is the max
1321 * integer range normalized floats can be safely converted to.
1323 return fastf2i(aluClampf(val
)*16777215.0f
)<<7;
1325 static inline ALuint
aluF2UI(ALfloat val
)
1326 { return aluF2I(val
)+2147483648u; }
1328 static inline ALshort
aluF2S(ALfloat val
)
1329 { return fastf2i(aluClampf(val
)*32767.0f
); }
1330 static inline ALushort
aluF2US(ALfloat val
)
1331 { return aluF2S(val
)+32768; }
1333 static inline ALbyte
aluF2B(ALfloat val
)
1334 { return fastf2i(aluClampf(val
)*127.0f
); }
1335 static inline ALubyte
aluF2UB(ALfloat val
)
1336 { return aluF2B(val
)+128; }
1338 #define DECL_TEMPLATE(T, func) \
1339 static void Write_##T(ALfloatBUFFERSIZE *InBuffer, ALvoid *OutBuffer, \
1340 ALuint SamplesToDo, ALuint numchans) \
1343 for(j = 0;j < numchans;j++) \
1345 const ALfloat *in = InBuffer[j]; \
1346 T *restrict out = (T*)OutBuffer + j; \
1347 for(i = 0;i < SamplesToDo;i++) \
1348 out[i*numchans] = func(in[i]); \
1352 DECL_TEMPLATE(ALfloat
, aluF2F
)
1353 DECL_TEMPLATE(ALuint
, aluF2UI
)
1354 DECL_TEMPLATE(ALint
, aluF2I
)
1355 DECL_TEMPLATE(ALushort
, aluF2US
)
1356 DECL_TEMPLATE(ALshort
, aluF2S
)
1357 DECL_TEMPLATE(ALubyte
, aluF2UB
)
1358 DECL_TEMPLATE(ALbyte
, aluF2B
)
1360 #undef DECL_TEMPLATE
1363 ALvoid
aluMixData(ALCdevice
*device
, ALvoid
*buffer
, ALsizei size
)
1366 ALvoice
*voice
, *voice_end
;
1373 SetMixerFPUMode(&oldMode
);
1377 IncrementRef(&device
->MixCount
);
1379 SamplesToDo
= minu(size
, BUFFERSIZE
);
1380 for(c
= 0;c
< device
->VirtOut
.NumChannels
;c
++)
1381 memset(device
->VirtOut
.Buffer
[c
], 0, SamplesToDo
*sizeof(ALfloat
));
1382 for(c
= 0;c
< device
->RealOut
.NumChannels
;c
++)
1383 memset(device
->RealOut
.Buffer
[c
], 0, SamplesToDo
*sizeof(ALfloat
));
1385 V0(device
->Backend
,lock
)();
1387 if((slot
=device
->DefaultSlot
) != NULL
)
1389 if(ATOMIC_EXCHANGE(ALenum
, &slot
->NeedsUpdate
, AL_FALSE
))
1390 V(slot
->EffectState
,update
)(device
, slot
);
1391 for(i
= 0;i
< slot
->NumChannels
;i
++)
1392 memset(slot
->WetBuffer
[i
], 0, SamplesToDo
*sizeof(ALfloat
));
1395 ctx
= ATOMIC_LOAD(&device
->ContextList
);
1398 if(!ctx
->DeferUpdates
)
1400 UpdateContextSources(ctx
);
1401 #define UPDATE_SLOT(iter) do { \
1402 if(ATOMIC_EXCHANGE(ALenum, &(*iter)->NeedsUpdate, AL_FALSE)) \
1403 V((*iter)->EffectState,update)(device, *iter); \
1404 for(i = 0;i < (*iter)->NumChannels;i++) \
1405 memset((*iter)->WetBuffer[i], 0, SamplesToDo*sizeof(ALfloat)); \
1407 VECTOR_FOR_EACH(ALeffectslot
*, ctx
->ActiveAuxSlots
, UPDATE_SLOT
);
1412 #define CLEAR_WET_BUFFER(iter) do { \
1413 for(i = 0;i < (*iter)->NumChannels;i++) \
1414 memset((*iter)->WetBuffer[i], 0, SamplesToDo*sizeof(ALfloat)); \
1416 VECTOR_FOR_EACH(ALeffectslot
*, ctx
->ActiveAuxSlots
, CLEAR_WET_BUFFER
);
1417 #undef CLEAR_WET_BUFFER
1420 /* source processing */
1421 voice
= ctx
->Voices
;
1422 voice_end
= voice
+ ctx
->VoiceCount
;
1423 for(;voice
!= voice_end
;++voice
)
1425 source
= voice
->Source
;
1426 if(source
&& source
->state
== AL_PLAYING
)
1427 MixSource(voice
, source
, device
, SamplesToDo
);
1430 /* effect slot processing */
1431 c
= VECTOR_SIZE(ctx
->ActiveAuxSlots
);
1432 for(i
= 0;i
< c
;i
++)
1434 const ALeffectslot
*slot
= VECTOR_ELEM(ctx
->ActiveAuxSlots
, i
);
1435 ALeffectState
*state
= slot
->EffectState
;
1436 V(state
,process
)(SamplesToDo
, slot
->WetBuffer
, device
->Dry
.Buffer
,
1437 device
->Dry
.NumChannels
);
1443 if(device
->DefaultSlot
!= NULL
)
1445 const ALeffectslot
*slot
= device
->DefaultSlot
;
1446 ALeffectState
*state
= slot
->EffectState
;
1447 V(state
,process
)(SamplesToDo
, slot
->WetBuffer
, device
->Dry
.Buffer
,
1448 device
->Dry
.NumChannels
);
1451 /* Increment the clock time. Every second's worth of samples is
1452 * converted and added to clock base so that large sample counts don't
1453 * overflow during conversion. This also guarantees an exact, stable
1455 device
->SamplesDone
+= SamplesToDo
;
1456 device
->ClockBase
+= (device
->SamplesDone
/device
->Frequency
) * DEVICE_CLOCK_RES
;
1457 device
->SamplesDone
%= device
->Frequency
;
1458 V0(device
->Backend
,unlock
)();
1462 HrtfMixerFunc HrtfMix
= SelectHrtfMixer();
1463 ALuint irsize
= GetHrtfIrSize(device
->Hrtf
);
1464 MixHrtfParams hrtfparams
;
1465 memset(&hrtfparams
, 0, sizeof(hrtfparams
));
1466 for(c
= 0;c
< device
->VirtOut
.NumChannels
;c
++)
1468 hrtfparams
.Current
= &device
->Hrtf_Params
[c
];
1469 hrtfparams
.Target
= &device
->Hrtf_Params
[c
];
1470 HrtfMix(device
->RealOut
.Buffer
, device
->VirtOut
.Buffer
[c
], 0,
1471 device
->Hrtf_Offset
, 0, irsize
, &hrtfparams
,
1472 &device
->Hrtf_State
[c
], SamplesToDo
1475 device
->Hrtf_Offset
+= SamplesToDo
;
1479 if(device
->Uhj_Encoder
)
1481 /* Encode to stereo-compatible 2-channel UHJ output. */
1482 EncodeUhj2(device
->Uhj_Encoder
, device
->RealOut
.Buffer
,
1483 device
->VirtOut
.Buffer
, SamplesToDo
);
1487 /* Apply binaural/crossfeed filter */
1488 for(i
= 0;i
< SamplesToDo
;i
++)
1491 samples
[0] = device
->RealOut
.Buffer
[0][i
];
1492 samples
[1] = device
->RealOut
.Buffer
[1][i
];
1493 bs2b_cross_feed(device
->Bs2b
, samples
);
1494 device
->RealOut
.Buffer
[0][i
] = samples
[0];
1495 device
->RealOut
.Buffer
[1][i
] = samples
[1];
1502 ALfloat (*OutBuffer
)[BUFFERSIZE
] = device
->RealOut
.Buffer
;
1503 ALuint OutChannels
= device
->RealOut
.NumChannels
;;
1505 #define WRITE(T, a, b, c, d) do { \
1506 Write_##T((a), (b), (c), (d)); \
1507 buffer = (T*)buffer + (c)*(d); \
1509 switch(device
->FmtType
)
1512 WRITE(ALbyte
, OutBuffer
, buffer
, SamplesToDo
, OutChannels
);
1515 WRITE(ALubyte
, OutBuffer
, buffer
, SamplesToDo
, OutChannels
);
1518 WRITE(ALshort
, OutBuffer
, buffer
, SamplesToDo
, OutChannels
);
1521 WRITE(ALushort
, OutBuffer
, buffer
, SamplesToDo
, OutChannels
);
1524 WRITE(ALint
, OutBuffer
, buffer
, SamplesToDo
, OutChannels
);
1527 WRITE(ALuint
, OutBuffer
, buffer
, SamplesToDo
, OutChannels
);
1530 WRITE(ALfloat
, OutBuffer
, buffer
, SamplesToDo
, OutChannels
);
1536 size
-= SamplesToDo
;
1537 IncrementRef(&device
->MixCount
);
1540 RestoreFPUMode(&oldMode
);
1544 ALvoid
aluHandleDisconnect(ALCdevice
*device
)
1546 ALCcontext
*Context
;
1548 device
->Connected
= ALC_FALSE
;
1550 Context
= ATOMIC_LOAD(&device
->ContextList
);
1553 ALvoice
*voice
, *voice_end
;
1555 voice
= Context
->Voices
;
1556 voice_end
= voice
+ Context
->VoiceCount
;
1557 while(voice
!= voice_end
)
1559 ALsource
*source
= voice
->Source
;
1560 voice
->Source
= NULL
;
1562 if(source
&& source
->state
== AL_PLAYING
)
1564 source
->state
= AL_STOPPED
;
1565 ATOMIC_STORE(&source
->current_buffer
, NULL
);
1566 source
->position
= 0;
1567 source
->position_fraction
= 0;
1572 Context
->VoiceCount
= 0;
1574 Context
= Context
->next
;