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
|
/***************************************************************************
Mul.h - multiplier
-------------------
begin : Thu Nov 01 2007
copyright : (C) 2007 by Thomas Eschenbacher
email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef MUL_H
#define MUL_H
#include "config.h"
#include "libkwave_export.h"
#include <QtGlobal>
#include <QMutex>
#include <QQueue>
#include <QSemaphore>
#include "libkwave/SampleArray.h"
#include "libkwave/SampleSink.h"
#include "libkwave/SampleSource.h"
class QVariant;
namespace Kwave
{
class LIBKWAVE_EXPORT Mul: public Kwave::SampleSource
{
Q_OBJECT
public:
/** Constructor */
Mul();
/** Destructor */
~Mul() override;
/** does nothing, work is done automatically in multiply() */
void goOn() override;
signals:
/** emits a block with the interpolated curve */
void output(Kwave::SampleArray data);
public slots:
/** receives input data for input A */
void input_a(Kwave::SampleArray data);
/** receives input data for input B */
void input_b(Kwave::SampleArray data);
/** sets input A to a constant value (as float) */
void set_a(const QVariant &a);
/** sets input B to a constant value (as float) */
void set_b(const QVariant &b);
private:
/** does the calculation */
virtual void multiply();
private:
/** queue for input A */
QQueue<Kwave::SampleArray> m_queue_a;
/** queue for input B */
QQueue<Kwave::SampleArray> m_queue_b;
/** semaphore to wait for input on input A */
QSemaphore m_sem_a;
/** semaphore to wait for input on input B */
QSemaphore m_sem_b;
/** buffer for input A (currently in work) */
Kwave::SampleArray m_a;
/** buffer for input B (currently in work) */
Kwave::SampleArray m_b;
/** buffer for output data */
Kwave::SampleArray m_buffer_x;
/** if true, input A is a constant */
bool m_a_is_const;
/** if true, input B is a constant */
bool m_b_is_const;
/** if m_a_is_const is set, the value of A */
float m_value_a;
/** if m_b_is_const is set, the value of B */
float m_value_b;
/** mutex for locking access to the queues */
QMutex m_lock;
};
}
#endif /* MUL_H */
/***************************************************************************/
/***************************************************************************/
|
