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/*************************************************************************
ReversePlugin.h - reverses the current selection
-------------------
begin : Tue Jun 09 2009
copyright : (C) 2009 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 REVERSE_PLUGIN_H
#define REVERSE_PLUGIN_H
#include "config.h"
#include <QString>
#include <QStringList>
#include "libkwave/Plugin.h"
#include "libkwave/Sample.h"
namespace Kwave
{
class SampleArray;
/**
* @class ReversePlugin
* Reverses the current selection by exchanging blocks of samples
* from front and back and reversing their content
*/
class ReversePlugin: public Kwave::Plugin
{
Q_OBJECT
public:
/**
* Constructor
* @param parent reference to our plugin manager
* @param args argument list [unused]
*/
ReversePlugin(QObject *parent, const QVariantList &args);
/** Destructor */
~ReversePlugin() override;
/**
* reverses the selection
* @param params list of strings with parameters
*/
void run(QStringList params) override;
private slots:
/**
* multiplies the progress by factor two and
* calls Kwave::Plugin::updateProgress
*/
void updateProgress(qreal progress) override;
private:
/**
* common slice parameters, which can be passed to all worker
* threads
*/
typedef struct {
sample_index_t m_first; /**< index of the first sample */
sample_index_t m_last; /**< index of the last sample */
unsigned int m_block_size; /**< block size [samples] */
} SliceParams;
/**
* reverse a slice of samples
* @param track index of the track
* @param src_a reader for reading from the start (forward)
* @param src_b reader fro reading from the end (backwards)
* @param params common slice parameters (first/last/block size)
*/
void reverseSlice(unsigned int track,
Kwave::SampleReader *src_a,
Kwave::SampleReader *src_b,
const Kwave::ReversePlugin::SliceParams ¶ms);
/** reverses the content of an array of samples */
void reverse(Kwave::SampleArray &buffer);
};
}
#endif /* REVERSE_PLUGIN_H */
//***************************************************************************
//***************************************************************************
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