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99 lines
2.8 KiB
99 lines
2.8 KiB
/***************************************************** vim:set ts=4 sw=4 sts=4:
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Description:
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Speeds up or slows down an audio file by stretching the audio stream.
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Uses the sox program to do the stretching.
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Copyright:
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(C) 2004 by Gary Cramblitt <garycramblitt@comcast.net>
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-------------------
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Original author: Gary Cramblitt <garycramblitt@comcast.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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******************************************************************************/
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#ifndef _STRETCHER_H_
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#define _STRETCHER_H_
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#include <kdemacros.h>
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#include "kdeexportfix.h"
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class KProcess;
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class KDE_EXPORT Stretcher : public TQObject{
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Q_OBJECT
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TQ_OBJECT
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public:
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/**
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* Constructor.
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*/
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Stretcher(TQObject *tqparent = 0, const char *name = 0);
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/**
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* Destructor.
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*/
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~Stretcher();
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enum StretcherState {
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ssIdle = 0, // Not doing anything. Ready to stretch.
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ssStretching = 1, // Stretching.
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ssFinished = 2 // Stretching finished.
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};
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/**
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* Stretch the given input file to an output file.
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* @param inFilename Name of input audio file.
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* @param outFilename Name of output audio file.
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* @param stretchFactor Amount to stretch. 2.0 is twice as slow. 0.5 is twice as fast.
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*/
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bool stretch(const TQString &inFilename, const TQString &outFilename, float stretchFactor);
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/**
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* Returns the state of the Stretcher.
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*/
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int getState();
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/**
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* Returns the output filename (as given in call to stretch).
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*/
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TQString getOutFilename();
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/**
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* Acknowledges the finished stretching.
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*/
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void ackFinished();
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signals:
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/**
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* Emitted whenever stretching is completed.
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*/
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void stretchFinished();
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private slots:
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void slotProcessExited(KProcess* proc);
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private:
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// Stretcher state.
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int m_state;
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// Sox process.
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KProcess* m_stretchProc;
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// Output file name.
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TQString m_outFilename;
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};
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#endif // _STRETCHER_H_
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