view audio/PlaySpeedRangeMapper.h @ 562:3c846b06c518 3.0-integration

When returning the frame that we have filled to, avoid accidentally reducing the frame number (making it appear we are less filled than we really are) when we had intended to round it up to the full requested amount. Fixes some unexpected double-playback in non-looping play-selection mode.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 QMUL.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _PLAY_SPEED_RANGE_MAPPER_H_
#define _PLAY_SPEED_RANGE_MAPPER_H_

#include "base/RangeMapper.h"

class PlaySpeedRangeMapper : public RangeMapper
{
public:
    PlaySpeedRangeMapper();

    int getMinPosition() const { return m_minpos; }
    int getMaxPosition() const { return m_maxpos; }
    
    virtual int getPositionForValue(double value) const;
    virtual int getPositionForValueUnclamped(double value) const;

    virtual double getValueForPosition(int position) const;
    virtual double getValueForPositionUnclamped(int position) const;

    int getPositionForFactor(double factor) const;
    double getValueForFactor(double factor) const;

    double getFactorForPosition(int position) const;
    double getFactorForValue(double value) const;

    virtual QString getUnit() const;
    
protected:
    int m_minpos;
    int m_maxpos;
};


#endif