view base/Preferences.h @ 979:c598b1d880f2

Fix potential null pointer deref

/* -*- 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 Chris Cannam and 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 _PREFERENCES_H_
#define _PREFERENCES_H_

#include "PropertyContainer.h"

#include "Window.h"

class Preferences : public PropertyContainer
{
    Q_OBJECT

public:
    static Preferences *getInstance();

    virtual PropertyList getProperties() const;
    virtual QString getPropertyLabel(const PropertyName &) const;
    virtual PropertyType getPropertyType(const PropertyName &) const;
    virtual int getPropertyRangeAndValue(const PropertyName &, int *, int *, int *) const;
    virtual QString getPropertyValueLabel(const PropertyName &, int value) const;
    virtual QString getPropertyContainerName() const;
    virtual QString getPropertyContainerIconName() const;

    enum SpectrogramSmoothing {
        NoSpectrogramSmoothing,
        SpectrogramInterpolated,
        SpectrogramZeroPadded,
        SpectrogramZeroPaddedAndInterpolated
    };

    enum SpectrogramXSmoothing {
        NoSpectrogramXSmoothing,
        SpectrogramXInterpolated
    };

    SpectrogramSmoothing getSpectrogramSmoothing() const { return m_spectrogramSmoothing; }
    SpectrogramXSmoothing getSpectrogramXSmoothing() const { return m_spectrogramXSmoothing; }
    float getTuningFrequency() const { return m_tuningFrequency; }
    WindowType getWindowType() const { return m_windowType; }
    int getResampleQuality() const { return m_resampleQuality; }

    //!!! harmonise with PaneStack
    enum PropertyBoxLayout {
        VerticallyStacked,
        Layered
    };
    PropertyBoxLayout getPropertyBoxLayout() const { return m_propertyBoxLayout; }

    int getViewFontSize() const { return m_viewFontSize; }

    bool getOmitTempsFromRecentFiles() const { return m_omitRecentTemps; }

    QString getTemporaryDirectoryRoot() const { return m_tempDirRoot; }

    /// If we should always resample audio to the same rate, return it; otherwise (the normal case) return 0
    int getFixedSampleRate() const { return m_fixedSampleRate; }

    /// True if we should resample second or subsequent audio file to match first audio file's rate
    bool getResampleOnLoad() const { return m_resampleOnLoad; }    
    
    /// True if audio files should be loaded with normalisation (max == 1)
    bool getNormaliseAudio() const { return m_normaliseAudio; }

    enum BackgroundMode {
        BackgroundFromTheme,
        DarkBackground,
        LightBackground 
    };
    BackgroundMode getBackgroundMode() const { return m_backgroundMode; }

    enum TimeToTextMode {
        TimeToTextMs,
        TimeToTextUs,
        TimeToText24Frame,
        TimeToText25Frame,
        TimeToText30Frame,
        TimeToText50Frame,
        TimeToText60Frame
    };
    TimeToTextMode getTimeToTextMode() const { return m_timeToTextMode; }

    int getOctaveOfMiddleC() const {
        // weed out unsupported octaves
        return getOctaveOfMiddleCInSystem(getSystemWithMiddleCInOctave(m_octave));
    }
    int getOctaveOfLowestMIDINote() const {
        return getOctaveOfMiddleC() - 5;
    }
    
    bool getShowSplash() const { return m_showSplash; }

public slots:
    virtual void setProperty(const PropertyName &, int);

    void setSpectrogramSmoothing(SpectrogramSmoothing smoothing);
    void setSpectrogramXSmoothing(SpectrogramXSmoothing smoothing);
    void setTuningFrequency(float freq);
    void setPropertyBoxLayout(PropertyBoxLayout layout);
    void setWindowType(WindowType type);
    void setResampleQuality(int quality);
    void setOmitTempsFromRecentFiles(bool omit);
    void setTemporaryDirectoryRoot(QString tempDirRoot);
    void setFixedSampleRate(int);
    void setResampleOnLoad(bool);
    void setNormaliseAudio(bool);
    void setBackgroundMode(BackgroundMode mode);
    void setTimeToTextMode(TimeToTextMode mode);
    void setOctaveOfMiddleC(int oct);
    void setViewFontSize(int size);
    void setShowSplash(bool);

private:
    Preferences(); // may throw DirectoryCreationFailed
    virtual ~Preferences();

    static Preferences *m_instance;

    // We don't support arbitrary octaves in the gui, because we want
    // to be able to label what the octave system comes from. These
    // are the ones we support. (But we save and load as octave
    // numbers, so as not to make the prefs format really confusing)
    enum OctaveNumberingSystem {
        C0_Centre,
        C3_Logic,
        C4_ASA,
        C5_Sonar
    };
    static int getOctaveOfMiddleCInSystem(OctaveNumberingSystem s);
    static OctaveNumberingSystem getSystemWithMiddleCInOctave(int o);

    SpectrogramSmoothing m_spectrogramSmoothing;
    SpectrogramXSmoothing m_spectrogramXSmoothing;
    float m_tuningFrequency;
    PropertyBoxLayout m_propertyBoxLayout;
    WindowType m_windowType;
    int m_resampleQuality;
    bool m_omitRecentTemps;
    QString m_tempDirRoot;
    int m_fixedSampleRate;
    bool m_resampleOnLoad;
    bool m_normaliseAudio;
    int m_viewFontSize;
    BackgroundMode m_backgroundMode;
    TimeToTextMode m_timeToTextMode;
    int m_octave;
    bool m_showSplash;
};

#endif