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];
82 extern const aluMatrixf IdentityMatrixf
;
84 inline void aluMatrixfSetRow(aluMatrixf
*matrix
, ALuint row
,
85 ALfloat m0
, ALfloat m1
, ALfloat m2
, ALfloat m3
)
87 matrix
->m
[row
][0] = m0
;
88 matrix
->m
[row
][1] = m1
;
89 matrix
->m
[row
][2] = m2
;
90 matrix
->m
[row
][3] = m3
;
93 inline void aluMatrixfSet(aluMatrixf
*matrix
, ALfloat m00
, ALfloat m01
, ALfloat m02
, ALfloat m03
,
94 ALfloat m10
, ALfloat m11
, ALfloat m12
, ALfloat m13
,
95 ALfloat m20
, ALfloat m21
, ALfloat m22
, ALfloat m23
,
96 ALfloat m30
, ALfloat m31
, ALfloat m32
, ALfloat m33
)
98 aluMatrixfSetRow(matrix
, 0, m00
, m01
, m02
, m03
);
99 aluMatrixfSetRow(matrix
, 1, m10
, m11
, m12
, m13
);
100 aluMatrixfSetRow(matrix
, 2, m20
, m21
, m22
, m23
);
101 aluMatrixfSetRow(matrix
, 3, m30
, m31
, m32
, m33
);
109 AF_BandPass
= AF_LowPass
| AF_HighPass
113 typedef struct MixGains
{
119 typedef struct MixHrtfParams
{
120 const HrtfParams
*Target
;
123 alignas(16) ALfloat Coeffs
[HRIR_LENGTH
][2];
128 typedef struct DirectParams
{
129 enum ActiveFilters FilterType
;
130 ALfilterState LowPass
;
131 ALfilterState HighPass
;
140 ALfloat Current
[MAX_OUTPUT_CHANNELS
];
141 ALfloat Target
[MAX_OUTPUT_CHANNELS
];
145 typedef struct SendParams
{
146 enum ActiveFilters FilterType
;
147 ALfilterState LowPass
;
148 ALfilterState HighPass
;
151 ALfloat Current
[MAX_OUTPUT_CHANNELS
];
152 ALfloat Target
[MAX_OUTPUT_CHANNELS
];
157 typedef const ALfloat
* (*ResamplerFunc
)(const BsincState
*state
,
158 const ALfloat
*src
, ALuint frac
, ALuint increment
, ALfloat
*restrict dst
, ALuint dstlen
161 typedef void (*MixerFunc
)(const ALfloat
*data
, ALuint OutChans
,
162 ALfloat (*restrict OutBuffer
)[BUFFERSIZE
], struct MixGains
*Gains
,
163 ALuint Counter
, ALuint OutPos
, ALuint BufferSize
);
164 typedef void (*RowMixerFunc
)(ALfloat
*OutBuffer
, const ALfloat
*gains
,
165 const ALfloat (*restrict data
)[BUFFERSIZE
], ALuint InChans
,
166 ALuint InPos
, ALuint BufferSize
);
167 typedef void (*HrtfMixerFunc
)(ALfloat (*restrict OutBuffer
)[BUFFERSIZE
], ALuint lidx
, ALuint ridx
,
168 const ALfloat
*data
, ALuint Counter
, ALuint Offset
, ALuint OutPos
,
169 const ALuint IrSize
, const MixHrtfParams
*hrtfparams
,
170 HrtfState
*hrtfstate
, ALuint BufferSize
);
171 typedef void (*HrtfDirectMixerFunc
)(ALfloat (*restrict OutBuffer
)[BUFFERSIZE
],
172 ALuint lidx
, ALuint ridx
, const ALfloat
*data
, ALuint Offset
,
173 const ALuint IrSize
, ALfloat (*restrict Coeffs
)[2],
174 ALfloat (*restrict Values
)[2], ALuint BufferSize
);
177 #define GAIN_MIX_MAX (16.0f) /* +24dB */
179 #define GAIN_SILENCE_THRESHOLD (0.00001f) /* -100dB */
181 #define SPEEDOFSOUNDMETRESPERSEC (343.3f)
182 #define AIRABSORBGAINHF (0.99426f) /* -0.05dB */
184 #define FRACTIONBITS (12)
185 #define FRACTIONONE (1<<FRACTIONBITS)
186 #define FRACTIONMASK (FRACTIONONE-1)
189 inline ALfloat
minf(ALfloat a
, ALfloat b
)
190 { return ((a
> b
) ? b
: a
); }
191 inline ALfloat
maxf(ALfloat a
, ALfloat b
)
192 { return ((a
> b
) ? a
: b
); }
193 inline ALfloat
clampf(ALfloat val
, ALfloat min
, ALfloat max
)
194 { return minf(max
, maxf(min
, val
)); }
196 inline ALdouble
mind(ALdouble a
, ALdouble b
)
197 { return ((a
> b
) ? b
: a
); }
198 inline ALdouble
maxd(ALdouble a
, ALdouble b
)
199 { return ((a
> b
) ? a
: b
); }
200 inline ALdouble
clampd(ALdouble val
, ALdouble min
, ALdouble max
)
201 { return mind(max
, maxd(min
, val
)); }
203 inline ALuint
minu(ALuint a
, ALuint b
)
204 { return ((a
> b
) ? b
: a
); }
205 inline ALuint
maxu(ALuint a
, ALuint b
)
206 { return ((a
> b
) ? a
: b
); }
207 inline ALuint
clampu(ALuint val
, ALuint min
, ALuint max
)
208 { return minu(max
, maxu(min
, val
)); }
210 inline ALint
mini(ALint a
, ALint b
)
211 { return ((a
> b
) ? b
: a
); }
212 inline ALint
maxi(ALint a
, ALint b
)
213 { return ((a
> b
) ? a
: b
); }
214 inline ALint
clampi(ALint val
, ALint min
, ALint max
)
215 { return mini(max
, maxi(min
, val
)); }
217 inline ALint64
mini64(ALint64 a
, ALint64 b
)
218 { return ((a
> b
) ? b
: a
); }
219 inline ALint64
maxi64(ALint64 a
, ALint64 b
)
220 { return ((a
> b
) ? a
: b
); }
221 inline ALint64
clampi64(ALint64 val
, ALint64 min
, ALint64 max
)
222 { return mini64(max
, maxi64(min
, val
)); }
224 inline ALuint64
minu64(ALuint64 a
, ALuint64 b
)
225 { return ((a
> b
) ? b
: a
); }
226 inline ALuint64
maxu64(ALuint64 a
, ALuint64 b
)
227 { return ((a
> b
) ? a
: b
); }
228 inline ALuint64
clampu64(ALuint64 val
, ALuint64 min
, ALuint64 max
)
229 { return minu64(max
, maxu64(min
, val
)); }
232 union ResamplerCoeffs
{
233 ALfloat FIR4
[FRACTIONONE
][4];
234 ALfloat FIR8
[FRACTIONONE
][8];
236 extern alignas(16) union ResamplerCoeffs ResampleCoeffs
;
238 extern alignas(16) const ALfloat bsincTab
[18840];
241 inline ALfloat
lerp(ALfloat val1
, ALfloat val2
, ALfloat mu
)
243 return val1
+ (val2
-val1
)*mu
;
245 inline ALfloat
resample_fir4(ALfloat val0
, ALfloat val1
, ALfloat val2
, ALfloat val3
, ALuint frac
)
247 const ALfloat
*k
= ResampleCoeffs
.FIR4
[frac
];
248 return k
[0]*val0
+ k
[1]*val1
+ k
[2]*val2
+ k
[3]*val3
;
250 inline ALfloat
resample_fir8(ALfloat val0
, ALfloat val1
, ALfloat val2
, ALfloat val3
, ALfloat val4
, ALfloat val5
, ALfloat val6
, ALfloat val7
, ALuint frac
)
252 const ALfloat
*k
= ResampleCoeffs
.FIR8
[frac
];
253 return k
[0]*val0
+ k
[1]*val1
+ k
[2]*val2
+ k
[3]*val3
+
254 k
[4]*val4
+ k
[5]*val5
+ k
[6]*val6
+ k
[7]*val7
;
258 enum HrtfRequestMode
{
265 void aluInitMixer(void);
267 MixerFunc
SelectMixer(void);
268 RowMixerFunc
SelectRowMixer(void);
272 * Set up the appropriate panning method and mixing method given the device
275 void aluInitRenderer(ALCdevice
*device
, ALint hrtf_id
, enum HrtfRequestMode hrtf_appreq
, enum HrtfRequestMode hrtf_userreq
);
277 void aluInitEffectPanning(struct ALeffectslot
*slot
);
280 * CalcDirectionCoeffs
282 * Calculates ambisonic coefficients based on a direction vector. The vector
283 * must be normalized (unit length), and the spread is the angular width of the
286 void CalcDirectionCoeffs(const ALfloat dir
[3], ALfloat spread
, ALfloat coeffs
[MAX_AMBI_COEFFS
]);
291 * Same as CalcDirectionCoeffs except the direction is specified as separate x,
292 * y, and z parameters instead of an array.
294 inline void CalcXYZCoeffs(ALfloat x
, ALfloat y
, ALfloat z
, ALfloat spread
, ALfloat coeffs
[MAX_AMBI_COEFFS
])
296 ALfloat dir
[3] = { x
, y
, z
};
297 CalcDirectionCoeffs(dir
, spread
, coeffs
);
303 * Calculates ambisonic coefficients based on azimuth and elevation. The
304 * azimuth and elevation parameters are in radians, going right and up
307 void CalcAngleCoeffs(ALfloat azimuth
, ALfloat elevation
, ALfloat spread
, ALfloat coeffs
[MAX_AMBI_COEFFS
]);
310 * ComputeAmbientGains
312 * Computes channel gains for ambient, omni-directional sounds.
314 #define ComputeAmbientGains(b, g, o) do { \
315 if((b).CoeffCount > 0) \
316 ComputeAmbientGainsMC((b).Ambi.Coeffs, (b).NumChannels, g, o); \
318 ComputeAmbientGainsBF((b).Ambi.Map, (b).NumChannels, g, o); \
320 void ComputeAmbientGainsMC(const ChannelConfig
*chancoeffs
, ALuint numchans
, ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
321 void ComputeAmbientGainsBF(const BFChannelConfig
*chanmap
, ALuint numchans
, ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
324 * ComputePanningGains
326 * Computes panning gains using the given channel decoder coefficients and the
327 * pre-calculated direction or angle coefficients.
329 #define ComputePanningGains(b, c, g, o) do { \
330 if((b).CoeffCount > 0) \
331 ComputePanningGainsMC((b).Ambi.Coeffs, (b).NumChannels, (b).CoeffCount, c, g, o);\
333 ComputePanningGainsBF((b).Ambi.Map, (b).NumChannels, c, g, o); \
335 void ComputePanningGainsMC(const ChannelConfig
*chancoeffs
, ALuint numchans
, ALuint numcoeffs
, const ALfloat coeffs
[MAX_AMBI_COEFFS
], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
336 void ComputePanningGainsBF(const BFChannelConfig
*chanmap
, ALuint numchans
, const ALfloat coeffs
[MAX_AMBI_COEFFS
], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
339 * ComputeFirstOrderGains
341 * Sets channel gains for a first-order ambisonics input channel. The matrix is
342 * a 1x4 'slice' of a transform matrix for the input channel, used to scale and
343 * orient the sound samples.
345 #define ComputeFirstOrderGains(b, m, g, o) do { \
346 if((b).CoeffCount > 0) \
347 ComputeFirstOrderGainsMC((b).Ambi.Coeffs, (b).NumChannels, m, g, o); \
349 ComputeFirstOrderGainsBF((b).Ambi.Map, (b).NumChannels, m, g, o); \
351 void ComputeFirstOrderGainsMC(const ChannelConfig
*chancoeffs
, ALuint numchans
, const ALfloat mtx
[4], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
352 void ComputeFirstOrderGainsBF(const BFChannelConfig
*chanmap
, ALuint numchans
, const ALfloat mtx
[4], ALfloat ingain
, ALfloat gains
[MAX_OUTPUT_CHANNELS
]);
355 ALvoid
MixSource(struct ALvoice
*voice
, struct ALsource
*source
, ALCdevice
*Device
, ALuint SamplesToDo
);
357 ALvoid
aluMixData(ALCdevice
*device
, ALvoid
*buffer
, ALsizei size
);
358 /* Caller must lock the device. */
359 ALvoid
aluHandleDisconnect(ALCdevice
*device
);
361 extern ALfloat ConeScale
;
362 extern ALfloat ZScale
;