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
|
#include "config.h"
#include "alMain.h"
#include "alSource.h"
#include "hrtf.h"
#include "align.h"
#include "alu.h"
#include "defs.h"
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] };
const ALfloat gainstep = hrtfparams->GainStep;
const ALfloat gain = hrtfparams->Gain;
ALfloat g, stepcount = 0.0f;
ALfloat left, right;
ALsizei i;
ASSUME(IrSize >= 4);
ASSUME(BufferSize > 0);
LeftOut += OutPos;
RightOut += OutPos;
for(i = 0;i < BufferSize;i++)
{
hrtfstate->History[Offset&HRTF_HISTORY_MASK] = *(data++);
g = gain + gainstep*stepcount;
left = hrtfstate->History[(Offset-Delay[0])&HRTF_HISTORY_MASK]*g;
right = hrtfstate->History[(Offset-Delay[1])&HRTF_HISTORY_MASK]*g;
hrtfstate->Values[(Offset+IrSize-1)&HRIR_MASK][0] = 0.0f;
hrtfstate->Values[(Offset+IrSize-1)&HRIR_MASK][1] = 0.0f;
ApplyCoeffs(Offset, hrtfstate->Values, IrSize, Coeffs, left, right);
*(LeftOut++) += hrtfstate->Values[Offset&HRIR_MASK][0];
*(RightOut++) += hrtfstate->Values[Offset&HRIR_MASK][1];
stepcount += 1.0f;
Offset++;
}
hrtfparams->Gain = gain + gainstep*stepcount;
}
void MixHrtfBlend(ALfloat *RESTRICT LeftOut, ALfloat *RESTRICT RightOut,
const ALfloat *data, ALsizei Offset, ALsizei OutPos,
const ALsizei IrSize, const HrtfParams *oldparams,
MixHrtfParams *newparams, HrtfState *hrtfstate,
ALsizei BufferSize)
{
const ALfloat (*OldCoeffs)[2] = ASSUME_ALIGNED(oldparams->Coeffs, 16);
const ALsizei OldDelay[2] = { oldparams->Delay[0], oldparams->Delay[1] };
const ALfloat oldGain = oldparams->Gain;
const ALfloat oldGainStep = -oldGain / (ALfloat)BufferSize;
const ALfloat (*NewCoeffs)[2] = ASSUME_ALIGNED(newparams->Coeffs, 16);
const ALsizei NewDelay[2] = { newparams->Delay[0], newparams->Delay[1] };
const ALfloat newGain = newparams->Gain;
const ALfloat newGainStep = newparams->GainStep;
ALfloat g, stepcount = 0.0f;
ALfloat left, right;
ALsizei i;
ASSUME(IrSize >= 4);
ASSUME(BufferSize > 0);
LeftOut += OutPos;
RightOut += OutPos;
for(i = 0;i < BufferSize;i++)
{
hrtfstate->Values[(Offset+IrSize-1)&HRIR_MASK][0] = 0.0f;
hrtfstate->Values[(Offset+IrSize-1)&HRIR_MASK][1] = 0.0f;
hrtfstate->History[Offset&HRTF_HISTORY_MASK] = *(data++);
g = oldGain + oldGainStep*stepcount;
left = hrtfstate->History[(Offset-OldDelay[0])&HRTF_HISTORY_MASK]*g;
right = hrtfstate->History[(Offset-OldDelay[1])&HRTF_HISTORY_MASK]*g;
ApplyCoeffs(Offset, hrtfstate->Values, IrSize, OldCoeffs, left, right);
g = newGain + newGainStep*stepcount;
left = hrtfstate->History[(Offset-NewDelay[0])&HRTF_HISTORY_MASK]*g;
right = hrtfstate->History[(Offset-NewDelay[1])&HRTF_HISTORY_MASK]*g;
ApplyCoeffs(Offset, hrtfstate->Values, IrSize, NewCoeffs, left, right);
*(LeftOut++) += hrtfstate->Values[Offset&HRIR_MASK][0];
*(RightOut++) += hrtfstate->Values[Offset&HRIR_MASK][1];
stepcount += 1.0f;
Offset++;
}
newparams->Gain = newGain + newGainStep*stepcount;
}
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 insample;
ALsizei i;
ASSUME(IrSize >= 4);
ASSUME(BufferSize > 0);
for(i = 0;i < BufferSize;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);
*(LeftOut++) += Values[Offset&HRIR_MASK][0];
*(RightOut++) += Values[Offset&HRIR_MASK][1];
}
}
|
