2 * OpenAL cross platform audio library
3 * Copyright (C) 1999-2010 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
34 extern inline void SetGains(const ALCdevice
*device
, ALfloat ingain
, ALfloat gains
[MaxChannels
]);
37 void ComputeAngleGains(const ALCdevice
*device
, ALfloat angle
, ALfloat elevation
, ALfloat ingain
, ALfloat gains
[MaxChannels
])
40 -sinf(angle
) * cosf(elevation
),
42 -cosf(angle
) * cosf(elevation
)
44 ComputeDirectionalGains(device
, dir
, ingain
, gains
);
47 void ComputeDirectionalGains(const ALCdevice
*device
, const ALfloat dir
[3], ALfloat ingain
, ALfloat gains
[MaxChannels
])
49 ALfloat coeffs
[MAX_AMBI_COEFFS
];
51 /* Convert from OpenAL coords to Ambisonics. */
56 coeffs
[0] = 0.7071f
; /* sqrt(1.0 / 2.0) */
57 coeffs
[1] = x
; /* X */
58 coeffs
[2] = y
; /* Y */
59 coeffs
[3] = z
; /* Z */
60 coeffs
[4] = 0.5f
* (3.0f
*z
*z
- 1.0f
); /* 0.5 * (3*Z*Z - 1) */
61 coeffs
[5] = 2.0f
* z
* x
; /* 2*Z*X */
62 coeffs
[6] = 2.0f
* y
* z
; /* 2*Y*Z */
63 coeffs
[7] = x
*x
- y
*y
; /* X*X - Y*Y */
64 coeffs
[8] = 2.0f
* x
* y
; /* 2*X*Y */
65 coeffs
[9] = 0.5f
* z
* (5.0f
*z
*z
- 3.0f
); /* 0.5 * Z * (5*Z*Z - 3) */
66 coeffs
[10] = 0.7262f
* x
* (5.0f
*z
*z
- 1.0f
); /* sqrt(135.0 / 256.0) * X * (5*Z*Z - 1) */
67 coeffs
[11] = 0.7262f
* y
* (5.0f
*z
*z
- 1.0f
); /* sqrt(135.0 / 256.0) * Y * (5*Z*Z - 1) */
68 coeffs
[12] = 2.5981f
* z
* (x
*x
- y
*y
); /* sqrt(27.0 / 4.0) * Z * (X*X - Y*Y) */
69 coeffs
[13] = 5.1962f
* x
* y
* z
; /* sqrt(27) * X * Y * Z */
70 coeffs
[14] = x
* (x
*x
- 3.0f
*y
*y
); /* X * (X*X - 3*Y*Y) */
71 coeffs
[15] = y
* (3.0f
*x
*x
- y
*y
); /* Y * (3*X*X - Y*Y) */
73 for(i
= 0;i
< MaxChannels
;i
++)
75 for(i
= 0;i
< device
->NumSpeakers
;i
++)
77 enum Channel chan
= device
->Speaker
[i
].ChanName
;
78 for(j
= 0;j
< MAX_AMBI_COEFFS
;j
++)
79 gains
[chan
] += device
->Speaker
[i
].Coeff
[j
]*coeffs
[j
];
80 gains
[chan
] = maxf(gains
[chan
], 0.0f
) * ingain
;
85 ALvoid
aluInitPanning(ALCdevice
*device
)
87 static const ChannelConfig MonoCfg
[1] = {
88 { FrontCenter
, DEG2RAD(0.0f
), DEG2RAD(0.0f
), { 1.4142f
} }
90 { FrontLeft
, DEG2RAD(-90.0f
), DEG2RAD(0.0f
), { 0.7071f
, -0.5f
, 0.0f
, 0.0f
} },
91 { FrontLeft
, DEG2RAD( 90.0f
), DEG2RAD(0.0f
), { 0.7071f
, 0.5f
, 0.0f
, 0.0f
} }
93 { FrontLeft
, DEG2RAD( -45.0f
), DEG2RAD(0.0f
), { 0.353558f
, 0.306181f
, 0.306192f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.117183f
} },
94 { FrontRight
, DEG2RAD( 45.0f
), DEG2RAD(0.0f
), { 0.353543f
, 0.306181f
, -0.306192f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.117193f
} },
95 { BackLeft
, DEG2RAD(-135.0f
), DEG2RAD(0.0f
), { 0.353543f
, -0.306192f
, 0.306181f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.117193f
} },
96 { BackRight
, DEG2RAD( 135.0f
), DEG2RAD(0.0f
), { 0.353558f
, -0.306192f
, -0.306181f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.117183f
} }
98 { FrontLeft
, DEG2RAD( -30.0f
), DEG2RAD(0.0f
), { 0.208954f
, 0.212846f
, 0.238350f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.017738f
, 0.204014f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.051023f
, 0.047490f
} },
99 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
), { 0.208950f
, 0.212842f
, -0.238350f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.017740f
, -0.204011f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.051022f
, -0.047489f
} },
100 { FrontCenter
, DEG2RAD( 0.0f
), DEG2RAD(0.0f
), { 0.109403f
, 0.179490f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.142031f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.072024f
, -0.000001f
} },
101 { BackLeft
, DEG2RAD(-110.0f
), DEG2RAD(0.0f
), { 0.470934f
, -0.369630f
, 0.349383f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.031379f
, -0.058143f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.007116f
, -0.043968f
} },
102 { BackRight
, DEG2RAD( 110.0f
), DEG2RAD(0.0f
), { 0.470936f
, -0.369626f
, -0.349386f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.031375f
, 0.058144f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.007119f
, 0.043968f
} }
104 { FrontLeft
, DEG2RAD(-30.0f
), DEG2RAD(0.0f
), { 0.167065f
, 0.200583f
, 0.172695f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.029855f
, 0.186407f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.039241f
, 0.068910f
} },
105 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
), { 0.167058f
, 0.200580f
, -0.172701f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.029846f
, -0.186405f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.039241f
, -0.068904f
} },
106 { FrontCenter
, DEG2RAD( 0.0f
), DEG2RAD(0.0f
), { 0.109403f
, 0.179490f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.142031f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.072024f
, -0.000001f
} },
107 { SideLeft
, DEG2RAD(-90.0f
), DEG2RAD(0.0f
), { 0.289151f
, -0.081301f
, 0.401292f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.188208f
, -0.071420f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.010099f
, -0.032897f
} },
108 { SideRight
, DEG2RAD( 90.0f
), DEG2RAD(0.0f
), { 0.289157f
, -0.081298f
, -0.401295f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.188208f
, 0.071419f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.010099f
, 0.032897f
} }
110 { FrontLeft
, DEG2RAD(-30.0f
), DEG2RAD(0.0f
), { 0.167065f
, 0.200583f
, 0.172695f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.029855f
, 0.186407f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.039241f
, 0.068910f
} },
111 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
), { 0.167058f
, 0.200580f
, -0.172701f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.029846f
, -0.186405f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.039241f
, -0.068904f
} },
112 { FrontCenter
, DEG2RAD( 0.0f
), DEG2RAD(0.0f
), { 0.109403f
, 0.179490f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.142031f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.072024f
, -0.000001f
} },
113 { BackCenter
, DEG2RAD(180.0f
), DEG2RAD(0.0f
), { 0.353556f
, -0.461940f
, -0.000006f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.165723f
, -0.000000f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.000000f
, 0.000005f
} },
114 { SideLeft
, DEG2RAD(-90.0f
), DEG2RAD(0.0f
), { 0.289151f
, -0.081301f
, 0.401292f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.188208f
, -0.071420f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.010099f
, -0.032897f
} },
115 { SideRight
, DEG2RAD( 90.0f
), DEG2RAD(0.0f
), { 0.289157f
, -0.081298f
, -0.401295f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.188208f
, 0.071419f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.010099f
, 0.032897f
} }
117 { FrontLeft
, DEG2RAD( -30.0f
), DEG2RAD(0.0f
), { 0.167065f
, 0.200583f
, 0.172695f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.029855f
, 0.186407f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.039241f
, 0.068910f
} },
118 { FrontRight
, DEG2RAD( 30.0f
), DEG2RAD(0.0f
), { 0.167058f
, 0.200580f
, -0.172701f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.029846f
, -0.186405f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.039241f
, -0.068904f
} },
119 { FrontCenter
, DEG2RAD( 0.0f
), DEG2RAD(0.0f
), { 0.109403f
, 0.179490f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.142031f
, -0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.072024f
, -0.000001f
} },
120 { BackLeft
, DEG2RAD(-150.0f
), DEG2RAD(0.0f
), { 0.224752f
, -0.295009f
, 0.170325f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.105349f
, -0.182473f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.000000f
, 0.065799f
} },
121 { BackRight
, DEG2RAD( 150.0f
), DEG2RAD(0.0f
), { 0.224739f
, -0.295005f
, -0.170331f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.105342f
, 0.182470f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.000000f
, -0.065792f
} },
122 { SideLeft
, DEG2RAD( -90.0f
), DEG2RAD(0.0f
), { 0.224739f
, 0.000002f
, 0.340644f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.210697f
, 0.000002f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.000000f
, -0.065795f
} },
123 { SideRight
, DEG2RAD( 90.0f
), DEG2RAD(0.0f
), { 0.224754f
, 0.000004f
, -0.340647f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.210697f
, -0.000004f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, 0.0f
, -0.000000f
, 0.065796f
} }
125 const ChannelConfig
*config
;
128 memset(device
->Speaker
, 0, sizeof(device
->Speaker
));
129 device
->NumSpeakers
= 0;
131 switch(device
->FmtChans
)
134 device
->NumSpeakers
= 1;
139 device
->NumSpeakers
= 2;
144 device
->NumSpeakers
= 4;
149 device
->NumSpeakers
= 5;
154 device
->NumSpeakers
= 5;
159 device
->NumSpeakers
= 6;
164 device
->NumSpeakers
= 7;
168 for(i
= 0;i
< device
->NumSpeakers
;i
++)
169 device
->Speaker
[i
] = config
[i
];