view data/model/RegionModel.h @ 1196:c7b9c902642f spectrogram-minor-refactor

Fix threshold in spectrogram -- it wasn't working in the last release.
There is a new protocol for this. Formerly the threshold parameter had a
range from -50dB to 0 with the default at -50, and -50 treated internally
as "no threshold". However, there was a hardcoded, hidden internal threshold
for spectrogram colour mapping at -80dB with anything below this being rounded
to zero. Now the threshold parameter has range -81 to -1 with the default
at -80, -81 is treated internally as "no threshold", and there is no hidden
internal threshold. So the default behaviour is the same as before, an
effective -80dB threshold, but it is now possible to change this in both
directions. Sessions reloaded from prior versions may look slightly different
because, if the session says there should be no threshold, there will now
actually be no threshold instead of having the hidden internal one.

Still need to do something in the UI to make it apparent that the -81dB
setting removes the threshold entirely. This is at least no worse than the
previous, also obscured, magic -50dB setting.

/* -*- 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.
    
    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 _REGION_MODEL_H_
#define _REGION_MODEL_H_

#include "IntervalModel.h"
#include "base/RealTime.h"

/**
 * RegionModel -- a concrete IntervalModel for intervals associated
 * with a value, which we call regions for no very compelling reason.
 */

/**
 * Region "point" type.  A region is something that has an onset time,
 * a single value, and a duration.  Like other points, it can also
 * have a label.
 *
 * This is called RegionRec instead of Region to avoid name collisions
 * with the X11 Region struct.  Bah.
 */

struct RegionRec
{
public:
    RegionRec() : frame(0), value(0.f), duration(0) { }
    RegionRec(sv_frame_t _frame) : frame(_frame), value(0.0f), duration(0) { }
    RegionRec(sv_frame_t _frame, float _value, sv_frame_t _duration, QString _label) :
	frame(_frame), value(_value), duration(_duration), label(_label) { }

    int getDimensions() const { return 3; }

    sv_frame_t frame;
    float value;
    sv_frame_t duration;
    QString label;

    QString getLabel() const { return label; }
    
    void toXml(QTextStream &stream,
               QString indent = "",
               QString extraAttributes = "") const
    {
	stream <<
            QString("%1<point frame=\"%2\" value=\"%3\" duration=\"%4\" label=\"%5\" %6/>\n")
	    .arg(indent).arg(frame).arg(value).arg(duration)
            .arg(XmlExportable::encodeEntities(label)).arg(extraAttributes);
    }

    QString toDelimitedDataString(QString delimiter, DataExportOptions, sv_samplerate_t sampleRate) const
    {
        QStringList list;
        list << RealTime::frame2RealTime(frame, sampleRate).toString().c_str();
        list << QString("%1").arg(value);
        list << RealTime::frame2RealTime(duration, sampleRate).toString().c_str();
        if (label != "") list << label;
        return list.join(delimiter);
    }

    struct Comparator {
	bool operator()(const RegionRec &p1,
			const RegionRec &p2) const {
	    if (p1.frame != p2.frame) return p1.frame < p2.frame;
	    if (p1.value != p2.value) return p1.value < p2.value;
	    if (p1.duration != p2.duration) return p1.duration < p2.duration;
	    return p1.label < p2.label;
	}
    };
    
    struct OrderComparator {
	bool operator()(const RegionRec &p1,
			const RegionRec &p2) const {
	    return p1.frame < p2.frame;
	}
    };
};


class RegionModel : public IntervalModel<RegionRec>
{
    Q_OBJECT
    
public:
    RegionModel(sv_samplerate_t sampleRate, int resolution,
                bool notifyOnAdd = true) :
	IntervalModel<RegionRec>(sampleRate, resolution, notifyOnAdd),
	m_valueQuantization(0),
        m_haveDistinctValues(false)
    {
    }

    RegionModel(sv_samplerate_t sampleRate, int resolution,
                float valueMinimum, float valueMaximum,
                bool notifyOnAdd = true) :
	IntervalModel<RegionRec>(sampleRate, resolution,
                            valueMinimum, valueMaximum,
                            notifyOnAdd),
	m_valueQuantization(0),
        m_haveDistinctValues(false)
    {
    }

    virtual ~RegionModel()
    {
    }

    float getValueQuantization() const { return m_valueQuantization; }
    void setValueQuantization(float q) { m_valueQuantization = q; }

    bool haveDistinctValues() const { return m_haveDistinctValues; }

    QString getTypeName() const { return tr("Region"); }

    virtual void toXml(QTextStream &out,
                       QString indent = "",
                       QString extraAttributes = "") const
    {
        std::cerr << "RegionModel::toXml: extraAttributes = \"" 
                  << extraAttributes.toStdString() << std::endl;

        IntervalModel<RegionRec>::toXml
	    (out,
             indent,
	     QString("%1 subtype=\"region\" valueQuantization=\"%2\"")
	     .arg(extraAttributes).arg(m_valueQuantization));
    }

    /**
     * TabularModel methods.  
     */
    
    virtual int getColumnCount() const
    {
        return 5;
    }

    virtual QString getHeading(int column) const
    {
        switch (column) {
        case 0: return tr("Time");
        case 1: return tr("Frame");
        case 2: return tr("Value");
        case 3: return tr("Duration");
        case 4: return tr("Label");
        default: return tr("Unknown");
        }
    }

    virtual QVariant getData(int row, int column, int role) const
    {
        if (column < 4) {
            return IntervalModel<RegionRec>::getData(row, column, role);
        }

        PointListConstIterator i = getPointListIteratorForRow(row);
        if (i == m_points.end()) return QVariant();

        switch (column) {
        case 4: return i->label;
        default: return QVariant();
        }
    }

    virtual Command *getSetDataCommand(int row, int column, const QVariant &value, int role)
    {
        if (column < 4) {
            return IntervalModel<RegionRec>::getSetDataCommand
                (row, column, value, role);
        }

        if (role != Qt::EditRole) return 0;
        PointListIterator i = getPointListIteratorForRow(row);
        if (i == m_points.end()) return 0;
        EditCommand *command = new EditCommand(this, tr("Edit Data"));

        Point point(*i);
        command->deletePoint(point);

        switch (column) {
        case 4: point.label = value.toString(); break;
        }

        command->addPoint(point);
        return command->finish();
    }

    virtual SortType getSortType(int column) const
    {
        if (column == 4) return SortAlphabetical;
        return SortNumeric;
    }

    virtual void addPoint(const Point &point)
    {
        if (point.value != 0.f) m_haveDistinctValues = true;
        IntervalModel<RegionRec>::addPoint(point);
    }
    
protected:
    float m_valueQuantization;
    bool m_haveDistinctValues;
};

#endif