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/***************************************************************************
VolumePlugin.cpp - Plugin for adjusting a signal's volume
-------------------
begin : Sun Oct 27 2002
copyright : (C) 2001 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 <new>
#include <QPointer>
#include <QStringList>
#include <KLocalizedString>
#include "libkwave/Connect.h"
#include "libkwave/MultiTrackReader.h"
#include "libkwave/MultiTrackSource.h"
#include "libkwave/MultiTrackWriter.h"
#include "libkwave/PluginManager.h"
#include "libkwave/SignalManager.h"
#include "libkwave/modules/Mul.h"
#include "libkwave/undo/UndoTransactionGuard.h"
#include "libgui/OverViewCache.h"
#include "VolumeDialog.h"
#include "VolumePlugin.h"
KWAVE_PLUGIN(volume, VolumePlugin)
//***************************************************************************
Kwave::VolumePlugin::VolumePlugin(QObject *parent, const QVariantList &args)
:Kwave::Plugin(parent, args), m_params(), m_factor(1.0)
{
}
//***************************************************************************
Kwave::VolumePlugin::~VolumePlugin()
{
}
//***************************************************************************
int Kwave::VolumePlugin::interpreteParameters(QStringList ¶ms)
{
bool ok;
QString param;
// evaluate the parameter list
if (params.count() != 2) return -EINVAL;
param = params[0];
m_factor = param.toFloat(&ok);
Q_ASSERT(ok);
if (!ok) return -EINVAL;
param = params[1];
unsigned int mode = param.toUInt(&ok);
Q_ASSERT(ok);
if (!ok || (mode > 2)) return -EINVAL;
// all parameters accepted
m_params = params;
return 0;
}
//***************************************************************************
QStringList *Kwave::VolumePlugin::setup(QStringList &previous_params)
{
// try to interprete the previous parameters
interpreteParameters(previous_params);
// initialize the overview cache
Kwave::SignalManager &mgr = manager().signalManager();
QVector<unsigned int> tracks;
sample_index_t first, last;
sample_index_t length = selection(&tracks, &first, &last, true);
Kwave::OverViewCache *overview_cache = new(std::nothrow)
Kwave::OverViewCache(
mgr, first, length, tracks.isEmpty() ? nullptr : &tracks
);
Q_ASSERT(overview_cache);
// create the setup dialog
QPointer<Kwave::VolumeDialog> dialog =
new(std::nothrow) Kwave::VolumeDialog(parentWidget(), overview_cache);
if (!dialog) {
delete overview_cache;
return nullptr;
}
if (!m_params.isEmpty()) dialog->setParams(m_params);
// execute the dialog
QStringList *list = new(std::nothrow) QStringList();
Q_ASSERT(list);
if (list && dialog->exec() && dialog) {
// user has pressed "OK"
*list = dialog->params();
} else {
// user pressed "Cancel"
delete list;
list = nullptr;
}
delete dialog;
delete overview_cache;
return list;
}
//***************************************************************************
void Kwave::VolumePlugin::run(QStringList params)
{
QVector<unsigned int> tracks;
sample_index_t first, last;
interpreteParameters(params);
if (!selection(&tracks, &first, &last, true) || tracks.isEmpty())
return;
Kwave::UndoTransactionGuard undo_guard(*this, i18n("Volume"));
// create all objects
Kwave::MultiTrackReader source(Kwave::SinglePassForward,
signalManager(), selectedTracks(), first, last);
Kwave::MultiTrackWriter sink(signalManager(), tracks, Kwave::Overwrite,
first, last);
Kwave::MultiTrackSource<Kwave::Mul, true> mul(
static_cast<unsigned int>(tracks.count()));
// connect the progress dialog
connect(&source, SIGNAL(progress(qreal)),
this, SLOT(updateProgress(qreal)),
Qt::BlockingQueuedConnection);
// connect them
Kwave::connect(
source, SIGNAL(output(Kwave::SampleArray)),
mul, SLOT(input_a(Kwave::SampleArray)));
mul.setAttribute(SLOT(set_b(QVariant)),
QVariant(m_factor));
Kwave::connect(
mul, SIGNAL(output(Kwave::SampleArray)),
sink, SLOT(input(Kwave::SampleArray)));
// transport the samples
qDebug("VolumePlugin: filter started...");
while (!shouldStop() && !source.done()) {
source.goOn();
mul.goOn();
}
qDebug("VolumePlugin: filter done.");
}
//***************************************************************************
#include "VolumePlugin.moc"
//***************************************************************************
//***************************************************************************
#include "moc_VolumePlugin.cpp"
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