16 #include "alAuxEffectSlot.h"
20 #include "math_defs.h"
23 #define MAX_PITCH (255)
25 /* Maximum number of buffer samples before the current pos needed for resampling. */
26 #define MAX_PRE_SAMPLES 12
28 /* Maximum number of buffer samples after the current pos needed for resampling. */
29 #define MAX_POST_SAMPLES 12
43 /* The number of distinct scale and phase intervals within the filter table. */
44 #define BSINC_SCALE_BITS 4
45 #define BSINC_SCALE_COUNT (1<<BSINC_SCALE_BITS)
46 #define BSINC_PHASE_BITS 4
47 #define BSINC_PHASE_COUNT (1<<BSINC_PHASE_BITS)
49 /* Interpolator state. Kind of a misnomer since the interpolator itself is
50 * stateless. This just keeps it from having to recompute scale-related
51 * mappings for every sample.
53 typedef struct BsincState
{
54 ALfloat sf
; /* Scale interpolation factor. */
55 ALuint m
; /* Coefficient count. */
56 ALint l
; /* Left coefficient offset. */
58 const ALfloat
*filter
; /* Filter coefficients. */
59 const ALfloat
*scDelta
; /* Scale deltas. */
60 const ALfloat
*phDelta
; /* Phase deltas. */
61 const ALfloat
*spDelta
; /* Scale-phase deltas. */
62 } coeffs
[BSINC_PHASE_COUNT
];
66 typedef union aluVector
{
67 alignas(16) ALfloat v
[4];
70 inline void aluVectorSet(aluVector
*vector
, ALfloat x
, ALfloat y
, ALfloat z
, ALfloat w
)
79 typedef union aluMatrixf
{
80 alignas(16) ALfloat m
[4][4];
83 inline void aluMatrixfSetRow(aluMatrixf
*matrix
, ALuint row
,
84 ALfloat m0
, ALfloat m1
, ALfloat m2
, ALfloat m3
)
86 matrix
->m
[row
][0] = m0
;
87 matrix
->m
[row
][1] = m1
;
88 matrix
->m
[row
][2] = m2
;
89 matrix
->m
[row
][3] = m3
;
92 inline void aluMatrixfSet(aluMatrixf
*matrix
, ALfloat m00
, ALfloat m01
, ALfloat m02
, ALfloat m03
,
93 ALfloat m10
, ALfloat m11
, ALfloat m12
, ALfloat m13
,
94 ALfloat m20
, ALfloat m21
, ALfloat m22
, ALfloat m23
,
95 ALfloat m30
, ALfloat m31
, ALfloat m32
, ALfloat m33
)
97 aluMatrixfSetRow(matrix
, 0, m00
, m01
, m02
, m03
);
98 aluMatrixfSetRow(matrix
, 1, m10
, m11
, m12
, m13
);
99 aluMatrixfSetRow(matrix
, 2, m20
, m21
, m22
, m23
);
100 aluMatrixfSetRow(matrix
, 3, m30
, m31
, m32
, m33
);
104 typedef union aluMatrixd
{
105 alignas(16) ALdouble m
[4][4];
108 inline void aluMatrixdSetRow(aluMatrixd
*matrix
, ALuint row
,
109 ALdouble m0
, ALdouble m1
, ALdouble m2
, ALdouble m3
)
111 matrix
->m
[row
][0] = m0
;
112 matrix
->m
[row
][1] = m1
;
113 matrix
->m
[row
][2] = m2
;
114 matrix
->m
[row
][3] = m3
;
117 inline void aluMatrixdSet(aluMatrixd
*matrix
, ALdouble m00
, ALdouble m01
, ALdouble m02
, ALdouble m03
,
118 ALdouble m10
, ALdouble m11
, ALdouble m12
, ALdouble m13
,
119 ALdouble m20
, ALdouble m21
, ALdouble m22
, ALdouble m23
,
120 ALdouble m30
, ALdouble m31
, ALdouble m32
, ALdouble m33
)
122 aluMatrixdSetRow(matrix
, 0, m00
, m01
, m02
, m03
);
123 aluMatrixdSetRow(matrix
, 1, m10
, m11
, m12
, m13
);
124 aluMatrixdSetRow(matrix
, 2, m20
, m21
, m22
, m23
);
125 aluMatrixdSetRow(matrix
, 3, m30
, m31
, m32
, m33
);
133 AF_BandPass
= AF_LowPass
| AF_HighPass
137 typedef struct MixGains
{
143 typedef struct MixHrtfParams
{
144 const HrtfParams
*Target
;
147 alignas(16) ALfloat Coeffs
[HRIR_LENGTH
][2];
152 typedef struct DirectParams
{
153 ALfloat (*OutBuffer
)[BUFFERSIZE
];
157 enum ActiveFilters ActiveType
;
158 ALfilterState LowPass
;
159 ALfilterState HighPass
;
160 } Filters
[MAX_INPUT_CHANNELS
];
166 } Hrtf
[MAX_INPUT_CHANNELS
];
169 ALfloat Current
[MAX_OUTPUT_CHANNELS
];
170 ALfloat Target
[MAX_OUTPUT_CHANNELS
];
171 } Gains
[MAX_INPUT_CHANNELS
];
174 typedef struct SendParams
{
175 ALfloat (*OutBuffer
)[BUFFERSIZE
];
179 enum ActiveFilters ActiveType
;
180 ALfilterState LowPass
;
181 ALfilterState HighPass
;
182 } Filters
[MAX_INPUT_CHANNELS
];
185 ALfloat Current
[MAX_OUTPUT_CHANNELS
];
186 ALfloat Target
[MAX_OUTPUT_CHANNELS
];
187 } Gains
[MAX_INPUT_CHANNELS
];
191 typedef const ALfloat
* (*ResamplerFunc
)(const BsincState
*state
,
192 const ALfloat
*src
, ALuint frac
, ALuint increment
, ALfloat
*restrict dst
, ALuint dstlen
195 typedef void (*MixerFunc
)(const ALfloat
*data
, ALuint OutChans
,
196 ALfloat (*restrict OutBuffer
)[BUFFERSIZE
], struct MixGains
*Gains
,
197 ALuint Counter
, ALuint OutPos
, ALuint BufferSize
);
198 typedef void (*HrtfMixerFunc
)(ALfloat (*restrict OutBuffer
)[BUFFERSIZE
], ALuint lidx
, ALuint ridx
,
199 const ALfloat
*data
, ALuint Counter
, ALuint Offset
, ALuint OutPos
,
200 const ALuint IrSize
, const MixHrtfParams
*hrtfparams
,
201 HrtfState
*hrtfstate
, ALuint BufferSize
);
204 #define GAIN_SILENCE_THRESHOLD (0.00001f) /* -100dB */
206 #define SPEEDOFSOUNDMETRESPERSEC (343.3f)
207 #define AIRABSORBGAINHF (0.99426f) /* -0.05dB */
209 #define FRACTIONBITS (12)
210 #define FRACTIONONE (1<<FRACTIONBITS)
211 #define FRACTIONMASK (FRACTIONONE-1)
214 inline ALfloat
minf(ALfloat a
, ALfloat b
)
215 { return ((a
> b
) ? b
: a
); }
216 inline ALfloat
maxf(ALfloat a
, ALfloat b
)
217 { return ((a
> b
) ? a
: b
); }
218 inline ALfloat
clampf(ALfloat val
, ALfloat min
, ALfloat max
)
219 { return minf(max
, maxf(min
, val
)); }
221 inline ALdouble
mind(ALdouble a
, ALdouble b
)
222 { return ((a
> b
) ? b
: a
); }
223 inline ALdouble
maxd(ALdouble a
, ALdouble b
)
224 { return ((a
> b
) ? a
: b
); }
225 inline ALdouble
clampd(ALdouble val
, ALdouble min
, ALdouble max
)
226 { return mind(max
, maxd(min
, val
)); }
228 inline ALuint
minu(ALuint a
, ALuint b
)
229 { return ((a
> b
) ? b
: a
); }
230 inline ALuint
maxu(ALuint a
, ALuint b
)
231 { return ((a
> b
) ? a
: b
); }
232 inline ALuint
clampu(ALuint val
, ALuint min
, ALuint max
)
233 { return minu(max
, maxu(min
, val
)); }
235 inline ALint
mini(ALint a
, ALint b
)
236 { return ((a
> b
) ? b
: a
); }
237 inline ALint
maxi(ALint a
, ALint b
)
238 { return ((a
> b
) ? a
: b
); }
239 inline ALint
clampi(ALint val
, ALint min
, ALint max
)
240 { return mini(max
, maxi(min
, val
)); }
242 inline ALint64
mini64(ALint64 a
, ALint64 b
)
243 { return ((a
> b
) ? b
: a
); }
244 inline ALint64
maxi64(ALint64 a
, ALint64 b
)
245 { return ((a
> b
) ? a
: b
); }
246 inline ALint64
clampi64(ALint64 val
, ALint64 min
, ALint64 max
)
247 { return mini64(max
, maxi64(min
, val
)); }
249 inline ALuint64
minu64(ALuint64 a
, ALuint64 b
)
250 { return ((a
> b
) ? b
: a
); }
251 inline ALuint64
maxu64(ALuint64 a
, ALuint64 b
)
252 { return ((a
> b
) ? a
: b
); }
253 inline ALuint64
clampu64(ALuint64 val
, ALuint64 min
, ALuint64 max
)
254 { return minu64(max
, maxu64(min
, val
)); }
257 union ResamplerCoeffs
{
258 ALfloat FIR4
[FRACTIONONE
][4];
259 ALfloat FIR8
[FRACTIONONE
][8];
261 extern alignas(16) union ResamplerCoeffs ResampleCoeffs
;
263 extern alignas(16) const ALfloat bsincTab
[18840];
266 inline ALfloat
lerp(ALfloat val1
, ALfloat val2
, ALfloat mu
)
268 return val1
+ (val2
-val1
)*mu
;
270 inline ALfloat
resample_fir4(ALfloat val0
, ALfloat val1
, ALfloat val2
, ALfloat val3
, ALuint frac
)
272 const ALfloat
*k
= ResampleCoeffs
.FIR4
[frac
];
273 return k
[0]*val0
+ k
[1]*val1
+ k
[2]*val2
+ k
[3]*val3
;
275 inline ALfloat
resample_fir8(ALfloat val0
, ALfloat val1
, ALfloat val2
, ALfloat val3
, ALfloat val4
, ALfloat val5
, ALfloat val6
, ALfloat val7
, ALuint frac
)
277 const ALfloat
*k
= ResampleCoeffs
.FIR8
[frac
];
278 return k
[0]*val0
+ k
[1]*val1
+ k
[2]*val2
+ k
[3]*val3
+
279 k
[4]*val4
+ k
[5]*val5
+ k
[6]*val6
+ k
[7]*val7
;
283 enum HrtfRequestMode
{
290 void aluInitMixer(void);
294 * Set up the appropriate panning method and mixing method given the device
297 void aluInitRenderer(ALCdevice
*device
, ALint hrtf_id
, enum HrtfRequestMode hrtf_appreq
, enum HrtfRequestMode hrtf_userreq
);
299 void aluInitEffectPanning(struct ALeffectslot
*slot
);
302 * CalcDirectionCoeffs
304 * Calculates ambisonic coefficients based on a direction vector. The vector
305 * must be normalized (unit length), and the spread is the angular width of the
308 void CalcDirectionCoeffs(const ALfloat dir
[3], ALfloat spread
, ALfloat coeffs
[MAX_AMBI_COEFFS
]);
313 * Same as CalcDirectionCoeffs except the direction is specified as separate x,
314 * y, and z parameters instead of an array.
316 inline void CalcXYZCoeffs(ALfloat x
, ALfloat y
, ALfloat z
, ALfloat spread
, ALfloat coeffs
[MAX_AMBI_COEFFS
])
318 ALfloat dir
[3] = { x
, y
, z
};
319 CalcDirectionCoeffs(dir
, spread
, coeffs
);
325 * Calculates ambisonic coefficients based on azimuth and elevation. The
326 * azimuth and elevation parameters are in radians, going right and up
329 void CalcAngleCoeffs(ALfloat azimuth
, ALfloat elevation
, ALfloat spread
, ALfloat coeffs
[MAX_AMBI_COEFFS
]);
332 * ComputeAmbientGains
334 * Computes channel gains for ambient, omni-directional sounds.
336 #define ComputeAmbientGains(b, g, o) do { \
337 if((b).CoeffCount > 0) \
338 ComputeAmbientGainsMC((b).Ambi.Coeffs, (b).NumChannels, g, o); \
340 ComputeAmbientGainsBF((b).Ambi.Map, (b).NumChannels, g, o); \
342 void ComputeAmbientGainsMC(const ChannelConfig
*chancoeffs
, ALuint numchans
, ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
343 void ComputeAmbientGainsBF(const BFChannelConfig
*chanmap
, ALuint numchans
, ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
346 * ComputePanningGains
348 * Computes panning gains using the given channel decoder coefficients and the
349 * pre-calculated direction or angle coefficients.
351 #define ComputePanningGains(b, c, g, o) do { \
352 if((b).CoeffCount > 0) \
353 ComputePanningGainsMC((b).Ambi.Coeffs, (b).NumChannels, (b).CoeffCount, c, g, o);\
355 ComputePanningGainsBF((b).Ambi.Map, (b).NumChannels, c, g, o); \
357 void ComputePanningGainsMC(const ChannelConfig
*chancoeffs
, ALuint numchans
, ALuint numcoeffs
, const ALfloat coeffs
[MAX_AMBI_COEFFS
], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
358 void ComputePanningGainsBF(const BFChannelConfig
*chanmap
, ALuint numchans
, const ALfloat coeffs
[MAX_AMBI_COEFFS
], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
361 * ComputeFirstOrderGains
363 * Sets channel gains for a first-order ambisonics input channel. The matrix is
364 * a 1x4 'slice' of a transform matrix for the input channel, used to scale and
365 * orient the sound samples.
367 #define ComputeFirstOrderGains(b, m, g, o) do { \
368 if((b).CoeffCount > 0) \
369 ComputeFirstOrderGainsMC((b).Ambi.Coeffs, (b).NumChannels, m, g, o); \
371 ComputeFirstOrderGainsBF((b).Ambi.Map, (b).NumChannels, m, g, o); \
373 void ComputeFirstOrderGainsMC(const ChannelConfig
*chancoeffs
, ALuint numchans
, const ALfloat mtx
[4], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
374 void ComputeFirstOrderGainsBF(const BFChannelConfig
*chanmap
, ALuint numchans
, const ALfloat mtx
[4], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
377 ALvoid
CalcAttnSourceParams(struct ALvoice
*voice
, const struct ALsourceProps
*props
, const struct ALbuffer
*buffer
, const ALCcontext
*ALContext
);
378 ALvoid
CalcNonAttnSourceParams(struct ALvoice
*voice
, const struct ALsourceProps
*props
, const struct ALbuffer
*buffer
, const ALCcontext
*ALContext
);
380 ALvoid
MixSource(struct ALvoice
*voice
, struct ALsource
*source
, ALCdevice
*Device
, ALuint SamplesToDo
);
382 ALvoid
aluMixData(ALCdevice
*device
, ALvoid
*buffer
, ALsizei size
);
383 /* Caller must lock the device. */
384 ALvoid
aluHandleDisconnect(ALCdevice
*device
);
386 extern ALfloat ConeScale
;
387 extern ALfloat ZScale
;