view data/model/AlignmentModel.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 2007 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 _ALIGNMENT_MODEL_H_
#define _ALIGNMENT_MODEL_H_

#include "Model.h"
#include "PathModel.h"
#include "base/RealTime.h"

#include <QString>
#include <QStringList>

class SparseTimeValueModel;

class AlignmentModel : public Model
{
    Q_OBJECT

public:
    AlignmentModel(Model *reference,
                   Model *aligned,
                   Model *inputModel, // probably an AggregateWaveModel; may be null; I take ownership
                   SparseTimeValueModel *path); // I take ownership
    ~AlignmentModel();

    virtual bool isOK() const;
    virtual sv_frame_t getStartFrame() const;
    virtual sv_frame_t getEndFrame() const;
    virtual sv_samplerate_t getSampleRate() const;
    virtual bool isReady(int *completion = 0) const;
    virtual const ZoomConstraint *getZoomConstraint() const;

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

    const Model *getReferenceModel() const;
    const Model *getAlignedModel() const;

    sv_frame_t toReference(sv_frame_t frame) const;
    sv_frame_t fromReference(sv_frame_t frame) const;

    void setPathFrom(SparseTimeValueModel *rawpath);
    void setPath(PathModel *path);

    virtual void toXml(QTextStream &stream,
                       QString indent = "",
                       QString extraAttributes = "") const;

signals:
    void modelChanged();
    void modelChangedWithin(sv_frame_t startFrame, sv_frame_t endFrame);
    void completionChanged();

protected slots:
    void pathChanged();
    void pathChangedWithin(sv_frame_t startFrame, sv_frame_t endFrame);
    void pathCompletionChanged();

protected:
    Model *m_reference; // I don't own this
    Model *m_aligned; // I don't own this

    Model *m_inputModel; // I own this

    SparseTimeValueModel *m_rawPath; // I own this
    mutable PathModel *m_path; // I own this
    mutable PathModel *m_reversePath; // I own this
    bool m_pathBegun;
    bool m_pathComplete;

    void constructPath() const;
    void constructReversePath() const;

    sv_frame_t align(PathModel *path, sv_frame_t frame) const;
};

#endif