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/***************************************************** vim:set ts=4 sw=4 sts=4:
Description:
Speeds up or slows down an audio file by stretching the audio stream.
Uses the sox program to do the stretching.
Copyright:
(C) 2004 by Gary Cramblitt <garycramblitt@comcast.net>
-------------------
Original author: Gary Cramblitt <garycramblitt@comcast.net>
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.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
******************************************************************************/
#ifndef _STRETCHER_H_
#define _STRETCHER_H_
#include <kdemacros.h>
#include "kdeexportfix.h"
class KProcess;
class KDE_EXPORT Stretcher : public QObject{
Q_OBJECT
public:
/**
* Constructor.
*/
Stretcher(TQObject *parent = 0, const char *name = 0);
/**
* Destructor.
*/
~Stretcher();
enum StretcherState {
ssIdle = 0, // Not doing anything. Ready to stretch.
ssStretching = 1, // Stretching.
ssFinished = 2 // Stretching finished.
};
/**
* Stretch the given input file to an output file.
* @param inFilename Name of input audio file.
* @param outFilename Name of output audio file.
* @param stretchFactor Amount to stretch. 2.0 is twice as slow. 0.5 is twice as fast.
*/
bool stretch(const TQString &inFilename, const TQString &outFilename, float stretchFactor);
/**
* Returns the state of the Stretcher.
*/
int getState();
/**
* Returns the output filename (as given in call to stretch).
*/
TQString getOutFilename();
/**
* Acknowledges the finished stretching.
*/
void ackFinished();
signals:
/**
* Emitted whenever stretching is completed.
*/
void stretchFinished();
private slots:
void slotProcessExited(KProcess* proc);
private:
// Stretcher state.
int m_state;
// Sox process.
KProcess* m_stretchProc;
// Output file name.
TQString m_outFilename;
};
#endif // _STRETCHER_H_
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