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
|
/*
Freeverb
Written by Jezar at Dreampoint, June 2000
http://www.dreampoint.co.uk
This code is public domain
modified for MuseScore Werner Schweer, 2009
*/
#ifndef _REV_H
#define _REV_H
#include "effects/effect.h"
static const int numcombs = 8;
static const int numallpasses = 4;
//---------------------------------------------------------
// Allpass
//---------------------------------------------------------
class Allpass {
float feedback;
float* buffer;
int bufsize;
int bufidx;
public:
void setbuffer(int size);
void setfeedback(float val) { feedback = val; }
float getfeedback() const { return feedback; }
float process(float _input) {
float bufout = buffer[bufidx];
float output = bufout - _input;
buffer[bufidx] = _input + (bufout * feedback);
++bufidx %= bufsize;
return output;
}
};
//---------------------------------------------------------
// Comb
//---------------------------------------------------------
class Comb {
float feedback;
float filterstore;
float damp1;
float damp2;
float* buffer;
int bufsize;
int bufidx;
public:
void setbuffer(int size);
void setdamp(float val);
float getdamp() const { return damp1; }
void setfeedback(float val) { feedback = val; }
float getfeedback() const { return feedback; }
float process(float input) {
float tmp = buffer[bufidx];
filterstore = (tmp * damp2) + (filterstore * damp1);
buffer[bufidx] = input + (filterstore * feedback);
++bufidx %= bufsize;
return tmp;
}
};
//---------------------------------------------------------
// Freeverb
//---------------------------------------------------------
class Freeverb : public Effect {
//Q_OBJECT
float roomsize, damp, width, sendLevel, wet;
float newRoomsize, newDamp, newWidth, newSendLevel, newWet;
float wet1, wet2;
bool parameterChanged;
Comb combL[numcombs];
Comb combR[numcombs];
Allpass allpassL[numallpasses];
Allpass allpassR[numallpasses];
void update();
public:
Freeverb();
virtual void process(int n, float* in, float* out);
virtual void setNValue(int idx, double value);
virtual double nvalue(int idx) const;
bool setPreset(int);
virtual const char* name() const { return "Freeverb"; }
virtual EffectGui* gui();
virtual const std::vector<ParDescr>& parDescr() const;
};
#endif
|
