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
|
/* ========================================
* SoftGate - SoftGate.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __SoftGate_H
#include "SoftGate.h"
#endif
void SoftGate::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double threshold = pow(A,6);
double recovery = pow((B*0.5),6);
recovery /= overallscale;
double baseline = pow(C,6);
double invrec = 1.0 - recovery;
while (--sampleFrames >= 0)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-37) inputSampleL = fpd * 1.18e-37;
if (fabs(inputSampleR)<1.18e-37) inputSampleR = fpd * 1.18e-37;
storedL[1] = storedL[0];
storedL[0] = inputSampleL;
diffL = storedL[0] - storedL[1];
storedR[1] = storedR[0];
storedR[0] = inputSampleR;
diffR = storedR[0] - storedR[1];
if (gate > 0) {gate = ((gate-baseline) * invrec) + baseline;}
if ((fabs(diffR) > threshold) || (fabs(diffL) > threshold)) {gate = 1.1;}
else {gate = (gate * invrec); if (threshold > 0) {gate += ((fabs(inputSampleL)/threshold) * recovery);gate += ((fabs(inputSampleR)/threshold) * recovery);}}
if (gate < 0) gate = 0;
if (gate < 1.0)
{
storedL[0] = storedL[1] + (diffL * gate);
storedR[0] = storedR[1] + (diffR * gate);
}
if (gate < 1) {
inputSampleL = (inputSampleL * gate) + (storedL[0] * (1.0-gate));
inputSampleR = (inputSampleR * gate) + (storedR[0] * (1.0-gate));
}
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void SoftGate::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double threshold = pow(A,6);
double recovery = pow((B*0.5),6);
recovery /= overallscale;
double baseline = pow(C,6);
double invrec = 1.0 - recovery;
while (--sampleFrames >= 0)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-43) inputSampleL = fpd * 1.18e-43;
if (fabs(inputSampleR)<1.18e-43) inputSampleR = fpd * 1.18e-43;
storedL[1] = storedL[0];
storedL[0] = inputSampleL;
diffL = storedL[0] - storedL[1];
storedR[1] = storedR[0];
storedR[0] = inputSampleR;
diffR = storedR[0] - storedR[1];
if (gate > 0) {gate = ((gate-baseline) * invrec) + baseline;}
if ((fabs(diffR) > threshold) || (fabs(diffL) > threshold)) {gate = 1.1;}
else {gate = (gate * invrec); if (threshold > 0) {gate += ((fabs(inputSampleL)/threshold) * recovery);gate += ((fabs(inputSampleR)/threshold) * recovery);}}
if (gate < 0) gate = 0;
if (gate < 1.0)
{
storedL[0] = storedL[1] + (diffL * gate);
storedR[0] = storedR[1] + (diffR * gate);
}
if (gate < 1) {
inputSampleL = (inputSampleL * gate) + (storedL[0] * (1.0-gate));
inputSampleR = (inputSampleR * gate) + (storedR[0] * (1.0-gate));
}
//begin 64 bit stereo floating point dither
int expon; frexp((double)inputSampleL, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
frexp((double)inputSampleR, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//end 64 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
|
