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
|
/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "audioequalizer.h"
QT_BEGIN_NAMESPACE
using namespace Phonon;
using namespace Phonon::MMF;
AudioEqualizer::AudioEqualizer(QObject *parent) : AbstractAudioEffect::AbstractAudioEffect(parent, createParams())
{
}
void AudioEqualizer::parameterChanged(const int pid,
const QVariant &value)
{
// There is no way to return an error from this function, so we just
// have to trap and ignore exceptions.
TRAP_IGNORE(eq()->SetBandLevelL(pid, value.toInt()));
}
bool AudioEqualizer::activateOn(CPlayerType *player)
{
m_effect.reset(CAudioEqualizer::NewL(*player));
return true;
}
CAudioEqualizer *AudioEqualizer::eq() const
{
return static_cast<CAudioEqualizer *>(m_effect.data());
}
QList<EffectParameter> AudioEqualizer::createParams()
{
QList<EffectParameter> retval;
// We temporarily create an AudioPlayer, and run the effect on it, so
// we can extract the readonly data we need.
AudioPlayer dummyPlayer;
activateOn(dummyPlayer.player());
TInt32 dbMin;
TInt32 dbMax;
eq()->DbLevelLimits(dbMin, dbMax);
const int bandCount = eq()->NumberOfBands();
for (int i = 0; i < bandCount; ++i) {
const qint32 hz = eq()->CenterFrequency(i);
const qint32 defVol = eq()->BandLevel(i);
retval.append(EffectParameter(i,
tr("Frequency band, %1 Hz").arg(hz),
EffectParameter::LogarithmicHint,
QVariant(qint32(defVol)),
QVariant(qint32(dbMin)),
QVariant(qint32(dbMax)),
QVariantList(),
QString()));
}
m_effect.reset();
return retval;
}
QT_END_NAMESPACE
|
