annotate data/model/NoteModel.h @ 314:70a232b1f12a

* Make XmlExportable::toXml the function that is universally overridden (and
  pure virtual) instead of toXmlString.  Tidies up some classes, notably the
  model classes, significantly.  Closes #1794561.

/* -*- 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 _NOTE_MODEL_H_
#define _NOTE_MODEL_H_

#include "SparseValueModel.h"
#include "base/PlayParameterRepository.h"
#include "base/RealTime.h"

/**
 * Note type for use in a SparseModel or SparseValueModel.  All we
 * mean by a "note" is something that has an onset time, a single
 * value, and a duration.  Like other points, it can also have a
 * label.  With this point type, the model can be thought of as
 * representing a simple MIDI-type piano roll, except that the y
 * coordinates (values) do not have to be discrete integers.
 */

struct Note
{
public:
    Note(long _frame) : frame(_frame), value(0.0f), duration(0) { }
    Note(long _frame, float _value, size_t _duration, QString _label) :
	frame(_frame), value(_value), duration(_duration), label(_label) { }

    int getDimensions() const { return 3; }

    long frame;
    float value;
    size_t duration;
    QString 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(label).arg(extraAttributes);
    }

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

    struct Comparator {
	bool operator()(const Note &p1,
			const Note &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 Note &p1,
			const Note &p2) const {
	    return p1.frame < p2.frame;
	}
    };
};


class NoteModel : public SparseValueModel<Note>
{
public:
    NoteModel(size_t sampleRate, size_t resolution,
	      bool notifyOnAdd = true) :
	SparseValueModel<Note>(sampleRate, resolution,
			       notifyOnAdd),
	m_valueQuantization(0)
    {
	PlayParameterRepository::getInstance()->addModel(this);
    }

    NoteModel(size_t sampleRate, size_t resolution,
	      float valueMinimum, float valueMaximum,
	      bool notifyOnAdd = true) :
	SparseValueModel<Note>(sampleRate, resolution,
			       valueMinimum, valueMaximum,
			       notifyOnAdd),
	m_valueQuantization(0)
    {
	PlayParameterRepository::getInstance()->addModel(this);
    }

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

    /**
     * Notes have a duration, so this returns all points that span any
     * of the given range (as well as the usual additional few before
     * and after).  Consequently this can be very slow (optimised data
     * structures still to be done!).
     */
    virtual PointList getPoints(long start, long end) const;

    /**
     * Notes have a duration, so this returns all points that span the
     * given frame.  Consequently this can be very slow (optimised
     * data structures still to be done!).
     */
    virtual PointList getPoints(long frame) const;

    virtual void toXml(QTextStream &out,
                       QString indent = "",
                       QString extraAttributes = "") const
    {
        SparseValueModel<Note>::toXml
	    (out,
             indent,
	     QString("%1 valueQuantization=\"%2\"")
	     .arg(extraAttributes).arg(m_valueQuantization));
    }

protected:
    float m_valueQuantization;
};

#endif