view data/model/AlignmentModel.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 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"

class SparseTimeValueModel;

class AlignmentModel : public Model
{
    Q_OBJECT

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

    virtual bool isOK() const;
    virtual size_t getStartFrame() const;
    virtual size_t getEndFrame() const;
    virtual size_t getSampleRate() const;
    virtual Model *clone() const;
    virtual bool isReady(int *completion = 0) const;
    virtual const ZoomConstraint *getZoomConstraint() const;

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

    size_t toReference(size_t frame) const;
    size_t fromReference(size_t frame) const;

signals:
    void modelChanged();
    void modelChanged(size_t startFrame, size_t endFrame);
    void completionChanged();

protected slots:
    void pathChanged();
    void pathChanged(size_t startFrame, size_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_path; // I own this
    mutable SparseTimeValueModel *m_reversePath; // I own this
    bool m_pathBegun;
    bool m_pathComplete;

    void constructReversePath() const;

    size_t align(SparseTimeValueModel *path, size_t frame) const;
};

#endif