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
|
#include "config.h"
#include "alMain.h"
#include "alSource.h"
#include "mixer_defs.h"
#ifdef __GNUC__
#define LIKELY(x) __builtin_expect(!!(x), 1)
#define UNLIKELY(x) __builtin_expect(!!(x), 0)
#else
#define LIKELY(x) (x)
#define UNLIKELY(x) (x)
#endif
#define REAL_MERGE2(a,b) a##b
#define MERGE2(a,b) REAL_MERGE2(a,b)
#define MixDirect_Hrtf MERGE2(MixDirect_Hrtf_,SUFFIX)
static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2],
const ALuint irSize,
ALfloat (*RESTRICT Coeffs)[2],
ALfloat (*RESTRICT CoeffStep)[2],
ALfloat left, ALfloat right);
static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2],
const ALuint irSize,
ALfloat (*RESTRICT Coeffs)[2],
ALfloat left, ALfloat right);
void MixDirect_Hrtf(ALCdevice *Device, DirectParams *params,
const ALfloat *RESTRICT data, ALuint srcchan,
ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
{
ALfloat (*RESTRICT DryBuffer)[BUFFERSIZE] = params->OutBuffer;
ALfloat *RESTRICT ClickRemoval = params->ClickRemoval;
ALfloat *RESTRICT PendingClicks = params->PendingClicks;
const ALuint IrSize = params->Hrtf.IrSize;
const ALint *RESTRICT DelayStep = params->Hrtf.DelayStep;
ALfloat (*RESTRICT CoeffStep)[2] = params->Hrtf.CoeffStep;
ALfloat (*RESTRICT TargetCoeffs)[2] = params->Hrtf.Coeffs[srcchan];
ALuint *RESTRICT TargetDelay = params->Hrtf.Delay[srcchan];
ALfloat *RESTRICT History = params->hrtfState->History[srcchan];
ALfloat (*RESTRICT Values)[2] = params->hrtfState->Values[srcchan];
ALint Counter = maxu(params->hrtfState->Counter, OutPos) - OutPos;
ALuint Offset = params->hrtfState->Offset + OutPos;
ALIGN(16) ALfloat Coeffs[HRIR_LENGTH][2];
ALuint Delay[2];
ALfloat left, right;
ALuint pos;
ALuint c;
(void)Device;
pos = 0;
for(c = 0;c < IrSize;c++)
{
Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter);
Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter);
}
Delay[0] = TargetDelay[0] - (DelayStep[0]*Counter);
Delay[1] = TargetDelay[1] - (DelayStep[1]*Counter);
if(LIKELY(OutPos == 0))
{
History[Offset&SRC_HISTORY_MASK] = data[pos];
left = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
(Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
(Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
ClickRemoval[FrontLeft] -= Values[(Offset+1)&HRIR_MASK][0] +
Coeffs[0][0] * left;
ClickRemoval[FrontRight] -= Values[(Offset+1)&HRIR_MASK][1] +
Coeffs[0][1] * right;
}
for(pos = 0;pos < BufferSize && Counter > 0;pos++)
{
History[Offset&SRC_HISTORY_MASK] = data[pos];
left = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
(Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
(Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
Delay[0] += DelayStep[0];
Delay[1] += DelayStep[1];
Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
Offset++;
ApplyCoeffsStep(Offset, Values, IrSize, Coeffs, CoeffStep, left, right);
DryBuffer[FrontLeft][OutPos] += Values[Offset&HRIR_MASK][0];
DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
OutPos++;
Counter--;
}
Delay[0] >>= HRTFDELAY_BITS;
Delay[1] >>= HRTFDELAY_BITS;
for(;pos < BufferSize;pos++)
{
History[Offset&SRC_HISTORY_MASK] = data[pos];
left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
Offset++;
ApplyCoeffs(Offset, Values, IrSize, Coeffs, left, right);
DryBuffer[FrontLeft][OutPos] += Values[Offset&HRIR_MASK][0];
DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
OutPos++;
}
if(LIKELY(OutPos == SamplesToDo))
{
History[Offset&SRC_HISTORY_MASK] = data[pos];
left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
PendingClicks[FrontLeft] += Values[(Offset+1)&HRIR_MASK][0] +
Coeffs[0][0] * left;
PendingClicks[FrontRight] += Values[(Offset+1)&HRIR_MASK][1] +
Coeffs[0][1] * right;
}
}
#undef MixDirect_Hrtf
#undef MERGE2
#undef REAL_MERGE2
#undef UNLIKELY
#undef LIKELY
|
