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
|
#include "config.h"
#include "alMain.h"
#include "alSource.h"
#include "hrtf.h"
#include "mixer_defs.h"
#include "align.h"
#include "alu.h"
#define MAX_UPDATE_SAMPLES 128
static inline void ApplyCoeffs(ALsizei Offset, ALfloat (*restrict Values)[2],
const ALsizei irSize,
const ALfloat (*restrict Coeffs)[2],
ALfloat left, ALfloat right);
void MixHrtf(ALfloat *restrict LeftOut, ALfloat *restrict RightOut,
const ALfloat *data, ALsizei Offset, ALsizei OutPos,
const ALsizei IrSize, MixHrtfParams *hrtfparams, HrtfState *hrtfstate,
ALsizei BufferSize)
{
const ALfloat (*Coeffs)[2] = ASSUME_ALIGNED(hrtfparams->Coeffs, 16);
const ALsizei Delay[2] = { hrtfparams->Delay[0], hrtfparams->Delay[1] };
ALfloat gainstep = hrtfparams->GainStep;
ALfloat gain = hrtfparams->Gain;
ALfloat left, right;
ALsizei pos, i;
for(pos = 0;pos < BufferSize;)
{
ALfloat out[MAX_UPDATE_SAMPLES][2];
ALsizei todo = mini(BufferSize-pos, MAX_UPDATE_SAMPLES);
for(i = 0;i < todo;i++)
{
hrtfstate->History[Offset&HRTF_HISTORY_MASK] = data[pos++];
left = hrtfstate->History[(Offset-Delay[0])&HRTF_HISTORY_MASK];
right = hrtfstate->History[(Offset-Delay[1])&HRTF_HISTORY_MASK];
hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
Offset++;
ApplyCoeffs(Offset, hrtfstate->Values, IrSize, Coeffs, left, right);
out[i][0] = hrtfstate->Values[Offset&HRIR_MASK][0]*gain;
out[i][1] = hrtfstate->Values[Offset&HRIR_MASK][1]*gain;
gain += gainstep;
}
for(i = 0;i < todo;i++)
LeftOut[OutPos+i] += out[i][0];
for(i = 0;i < todo;i++)
RightOut[OutPos+i] += out[i][1];
OutPos += todo;
}
hrtfparams->Gain = gain;
}
void MixDirectHrtf(ALfloat *restrict LeftOut, ALfloat *restrict RightOut,
const ALfloat *data, ALsizei Offset, const ALsizei IrSize,
const ALfloat (*restrict Coeffs)[2], ALfloat (*restrict Values)[2],
ALsizei BufferSize)
{
ALfloat out[MAX_UPDATE_SAMPLES][2];
ALfloat insample;
ALsizei pos, i;
for(pos = 0;pos < BufferSize;)
{
ALsizei todo = mini(BufferSize-pos, MAX_UPDATE_SAMPLES);
for(i = 0;i < todo;i++)
{
Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
Offset++;
insample = *(data++);
ApplyCoeffs(Offset, Values, IrSize, Coeffs, insample, insample);
out[i][0] = Values[Offset&HRIR_MASK][0];
out[i][1] = Values[Offset&HRIR_MASK][1];
}
for(i = 0;i < todo;i++)
LeftOut[pos+i] += out[i][0];
for(i = 0;i < todo;i++)
RightOut[pos+i] += out[i][1];
pos += todo;
}
}
|
