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
|
/***************************************************************************
PitchShiftPlugin.cpp - plugin for modifying the "pitch_shift"
-------------------
begin : Sun Mar 23 2003
copyright : (C) 2003 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. *
* *
***************************************************************************/
#include "config.h"
#include <errno.h>
#include <math.h>
#include <new>
#include <QStringList>
#include <KLocalizedString>
#include "PitchShiftDialog.h"
#include "PitchShiftFilter.h"
#include "PitchShiftPlugin.h"
#include "libkwave/MultiTrackSource.h"
KWAVE_PLUGIN(pitch_shift, PitchShiftPlugin)
//***************************************************************************
Kwave::PitchShiftPlugin::PitchShiftPlugin(QObject *parent,
const QVariantList &args)
:Kwave::FilterPlugin(parent, args),
m_speed(1.0), m_frequency(5.0), m_percentage_mode(false),
m_last_speed(0), m_last_freq(0)
{
}
//***************************************************************************
Kwave::PitchShiftPlugin::~PitchShiftPlugin()
{
}
//***************************************************************************
int Kwave::PitchShiftPlugin::interpreteParameters(QStringList ¶ms)
{
bool ok;
QString param;
// evaluate the parameter list
if (params.count() != 3) return -EINVAL;
param = params[0];
m_speed = param.toDouble(&ok);
Q_ASSERT(ok);
if (!ok) return -EINVAL;
param = params[1];
m_frequency = param.toDouble(&ok);
Q_ASSERT(ok);
if (!ok) return -EINVAL;
param = params[2];
m_percentage_mode = (param.toUInt(&ok));
Q_ASSERT(ok);
if (!ok) return -EINVAL;
return 0;
}
//***************************************************************************
Kwave::PluginSetupDialog *Kwave::PitchShiftPlugin::createDialog(QWidget *parent)
{
Kwave::PitchShiftDialog *dialog = new(std::nothrow)
Kwave::PitchShiftDialog(parent);
Q_ASSERT(dialog);
if (!dialog) return nullptr;
// connect the signals for detecting value changes in pre-listen mode
connect(dialog, SIGNAL(changed(double,double)),
this, SLOT(setValues(double,double)));
return dialog;
}
//***************************************************************************
Kwave::SampleSource *Kwave::PitchShiftPlugin::createFilter(unsigned int tracks)
{
return new(std::nothrow)
Kwave::MultiTrackSource<Kwave::PitchShiftFilter, true>(tracks);
}
//***************************************************************************
bool Kwave::PitchShiftPlugin::paramsChanged()
{
return (!qFuzzyCompare(m_speed, m_last_speed) ||
!qFuzzyCompare(m_frequency, m_last_freq));
}
//***************************************************************************
void Kwave::PitchShiftPlugin::updateFilter(Kwave::SampleSource *filter,
bool force)
{
double sr = signalRate();
if (!filter) return;
if (!qFuzzyCompare(m_frequency, m_last_freq) || force)
filter->setAttribute(SLOT(setFrequency(QVariant)),
QVariant((m_frequency * 2.0 * M_PI) / sr));
if (!qFuzzyCompare(m_speed, m_last_speed) || force)
filter->setAttribute(SLOT(setSpeed(QVariant)),
QVariant(m_speed));
m_last_freq = m_frequency;
m_last_speed = m_speed;
}
//***************************************************************************
QString Kwave::PitchShiftPlugin::actionName()
{
return i18n("Pitch Shift");
}
//***************************************************************************
void Kwave::PitchShiftPlugin::setValues(double speed, double frequency)
{
m_frequency = frequency;
m_speed = speed;
}
//***************************************************************************
#include "PitchShiftPlugin.moc"
//***************************************************************************
//***************************************************************************
#include "moc_PitchShiftPlugin.cpp"
|
