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/***************************************************************************
ZeroPlugin.cpp - wipes out the selected range of samples to zero
-------------------
begin : Fri Jun 01 2001
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 <math.h>
#include <new>
#include <KLocalizedString> // for the i18n macro
#include <QList>
#include <QStringList>
#include "libkwave/MultiTrackWriter.h"
#include "libkwave/PluginManager.h"
#include "libkwave/Utils.h"
#include "libkwave/Writer.h"
#include "libkwave/undo/UndoTransactionGuard.h"
#include "libgui/SelectTimeWidget.h" // for selection mode
#include "ZeroPlugin.h"
KWAVE_PLUGIN(zero, ZeroPlugin)
#define ZERO_COUNT (64 * 1024)
//***************************************************************************
Kwave::ZeroPlugin::ZeroPlugin(QObject *parent, const QVariantList &args)
:Kwave::Plugin(parent, args), m_zeroes()
{
}
//***************************************************************************
Kwave::ZeroPlugin::~ZeroPlugin()
{
}
//***************************************************************************
void Kwave::ZeroPlugin::run(QStringList params)
{
QVector<unsigned int> tracks;
sample_index_t first = 0;
sample_index_t last = 0;
bool succeeded = true;
Kwave::UndoTransactionGuard undo_guard(*this, i18n("Silence"));
Kwave::MultiTrackWriter *writers = nullptr;
/*
* new mode: insert a range filled with silence:
* -> usage: zero(<mode>, <range>)
*/
if (params.count() == 2) {
// get the current selection
selection(&tracks, &first, &last, false);
// mode for the time (like in selectrange plugin)
bool ok = true;
int mode = params[0].toInt(&ok);
Q_ASSERT(ok);
if (!ok) return;
Q_ASSERT(
(mode == static_cast<int>(Kwave::SelectTimeWidget::byTime)) ||
(mode == static_cast<int>(Kwave::SelectTimeWidget::bySamples)) ||
(mode == static_cast<int>(Kwave::SelectTimeWidget::byPercents))
);
if ((mode != static_cast<int>(Kwave::SelectTimeWidget::byTime)) &&
(mode != static_cast<int>(Kwave::SelectTimeWidget::bySamples)) &&
(mode != static_cast<int>(Kwave::SelectTimeWidget::byPercents)))
{
return;
}
// length of the range of zeroes to insert
unsigned int time = params[1].toUInt(&ok);
Q_ASSERT(ok);
if (!ok) return;
// convert from time to samples
sample_index_t length = Kwave::SelectTimeWidget::timeToSamples(
static_cast<Kwave::SelectTimeWidget::Mode>(mode),
time, signalRate(), signalLength());
// some sanity check
Q_ASSERT(length);
Q_ASSERT(!tracks.isEmpty());
if (!length || tracks.isEmpty()) return; // nothing to do
last = first + length - 1;
writers = new(std::nothrow) Kwave::MultiTrackWriter(signalManager(),
tracks, Kwave::Insert, first, last);
} else {
writers = new(std::nothrow) Kwave::MultiTrackWriter(signalManager(),
Kwave::Overwrite);
}
if (!writers) return; // out-of-memory
// break if aborted
if (!writers->tracks()) return;
// connect the progress dialog
connect(writers, SIGNAL(progress(qreal)),
this, SLOT(updateProgress(qreal)),
Qt::BlockingQueuedConnection);
first = (*writers)[0]->first();
last = (*writers)[0]->last();
unsigned int count = writers->tracks();
// get the buffer with zeroes for faster filling
if (m_zeroes.size() != ZERO_COUNT) {
succeeded &= m_zeroes.resize(ZERO_COUNT);
Q_ASSERT(succeeded);
m_zeroes.fill(0);
}
Q_ASSERT(m_zeroes.size() == ZERO_COUNT);
// loop over the sample range
while ((first <= last) && !shouldStop() && succeeded) {
sample_index_t rest = last - first + 1;
if (rest < m_zeroes.size()) {
succeeded &= m_zeroes.resize(Kwave::toUint(rest));
Q_ASSERT(succeeded);
if (!succeeded) break;
}
// loop over all writers
unsigned int w;
for (w = 0; w < count; w++) {
*((*writers)[w]) << m_zeroes;
}
first += m_zeroes.size();
}
delete writers;
}
//***************************************************************************
#include "ZeroPlugin.moc"
//***************************************************************************
//***************************************************************************
#include "moc_ZeroPlugin.cpp"
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