1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
#ifndef _ALU_H_
#define _ALU_H_
#include "AL/al.h"
#include "AL/alc.h"
#include "AL/alext.h"
#include <math.h>
#ifdef HAVE_FLOAT_H
#include <float.h>
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846 /* pi */
#define M_PI_2 1.57079632679489661923 /* pi/2 */
#endif
#ifdef HAVE_POWF
#define aluPow(x,y) ((ALfloat)powf((float)(x),(float)(y)))
#else
#define aluPow(x,y) ((ALfloat)pow((double)(x),(double)(y)))
#endif
#ifdef HAVE_SQRTF
#define aluSqrt(x) ((ALfloat)sqrtf((float)(x)))
#else
#define aluSqrt(x) ((ALfloat)sqrt((double)(x)))
#endif
#ifdef HAVE_ACOSF
#define aluAcos(x) ((ALfloat)acosf((float)(x)))
#else
#define aluAcos(x) ((ALfloat)acos((double)(x)))
#endif
#ifdef HAVE_ATANF
#define aluAtan(x) ((ALfloat)atanf((float)(x)))
#else
#define aluAtan(x) ((ALfloat)atan((double)(x)))
#endif
#ifdef HAVE_FABSF
#define aluFabs(x) ((ALfloat)fabsf((float)(x)))
#else
#define aluFabs(x) ((ALfloat)fabs((double)(x)))
#endif
// fixes for mingw32.
#if defined(max) && !defined(__max)
#define __max max
#endif
#if defined(min) && !defined(__min)
#define __min min
#endif
#define QUADRANT_NUM 128
#define LUT_NUM (4 * QUADRANT_NUM)
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
FRONT_LEFT = 0,
FRONT_RIGHT,
FRONT_CENTER,
LFE,
BACK_LEFT,
BACK_RIGHT,
BACK_CENTER,
SIDE_LEFT,
SIDE_RIGHT,
OUTPUTCHANNELS
} Channel;
#define BUFFERSIZE 24000
extern ALboolean DuplicateStereo;
/* NOTE: The AL_FORMAT_REAR* enums aren't handled here be cause they're
* converted to AL_FORMAT_QUAD* when loaded */
static __inline ALuint aluBytesFromFormat(ALenum format)
{
switch(format)
{
case AL_FORMAT_MONO8:
case AL_FORMAT_STEREO8:
case AL_FORMAT_QUAD8_LOKI:
case AL_FORMAT_QUAD8:
case AL_FORMAT_51CHN8:
case AL_FORMAT_61CHN8:
case AL_FORMAT_71CHN8:
return 1;
case AL_FORMAT_MONO16:
case AL_FORMAT_STEREO16:
case AL_FORMAT_QUAD16_LOKI:
case AL_FORMAT_QUAD16:
case AL_FORMAT_51CHN16:
case AL_FORMAT_61CHN16:
case AL_FORMAT_71CHN16:
return 2;
case AL_FORMAT_MONO_FLOAT32:
case AL_FORMAT_STEREO_FLOAT32:
case AL_FORMAT_QUAD32:
case AL_FORMAT_51CHN32:
case AL_FORMAT_61CHN32:
case AL_FORMAT_71CHN32:
return 4;
default:
return 0;
}
}
static __inline ALuint aluChannelsFromFormat(ALenum format)
{
switch(format)
{
case AL_FORMAT_MONO8:
case AL_FORMAT_MONO16:
case AL_FORMAT_MONO_FLOAT32:
return 1;
case AL_FORMAT_STEREO8:
case AL_FORMAT_STEREO16:
case AL_FORMAT_STEREO_FLOAT32:
return 2;
case AL_FORMAT_QUAD8_LOKI:
case AL_FORMAT_QUAD16_LOKI:
case AL_FORMAT_QUAD8:
case AL_FORMAT_QUAD16:
case AL_FORMAT_QUAD32:
return 4;
case AL_FORMAT_51CHN8:
case AL_FORMAT_51CHN16:
case AL_FORMAT_51CHN32:
return 6;
case AL_FORMAT_61CHN8:
case AL_FORMAT_61CHN16:
case AL_FORMAT_61CHN32:
return 7;
case AL_FORMAT_71CHN8:
case AL_FORMAT_71CHN16:
case AL_FORMAT_71CHN32:
return 8;
default:
return 0;
}
}
static __inline ALint aluCart2LUTpos(ALfloat re, ALfloat im)
{
ALint pos = 0;
ALfloat denom = aluFabs(re) + aluFabs(im);
if(denom > 0.0f)
pos = (ALint)(QUADRANT_NUM*aluFabs(im) / denom + 0.5);
if(re < 0.0)
pos = 2 * QUADRANT_NUM - pos;
if(im < 0.0)
pos = LUT_NUM - pos;
return pos%LUT_NUM;
}
ALvoid aluInitPanning(ALCcontext *Context);
ALvoid aluMixData(ALCdevice *device, ALvoid *buffer, ALsizei size);
ALvoid aluHandleDisconnect(ALCdevice *device);
#ifdef __cplusplus
}
#endif
#endif
|
