view data/model/SparseTimeValueModel.h @ 335:02d2ad95ea52 spectrogram-cache-rejig

* Get storage advice for each cache in an FFT data server.  Allows us to be
  more confident about the actual memory situation and cut over from memory
  to disc part way through an FFT calculation if necessary.  StorageAdviser
  is now a bit too optimistic though (it's too keen to allocate large numbers
  of small blocks in memory).

/* -*- 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 _SPARSE_TIME_VALUE_MODEL_H_
#define _SPARSE_TIME_VALUE_MODEL_H_

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

/**
 * Time/value point type for use in a SparseModel or SparseValueModel.
 * With this point type, the model basically represents a wiggly-line
 * plot with points at arbitrary intervals of the model resolution.
 */

struct TimeValuePoint
{
public:
    TimeValuePoint(long _frame) : frame(_frame), value(0.0f) { }
    TimeValuePoint(long _frame, float _value, QString _label) : 
	frame(_frame), value(_value), label(_label) { }

    int getDimensions() const { return 2; }
    
    long frame;
    float value;
    QString label;
    
    void toXml(QTextStream &stream, QString indent = "",
               QString extraAttributes = "") const
    {
        stream << QString("%1<point frame=\"%2\" value=\"%3\" label=\"%4\" %5/>\n")
	    .arg(indent).arg(frame).arg(value).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);
        if (label != "") list << label;
        return list.join(delimiter);
    }

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


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

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


#endif