view data/model/WaveFileModel.h @ 284:41d64b873d87

* continue to pick "new" colours for coloured layers even when all colours
  have been used at least once, rather than sticking on the last one
* some messing about with application palette settings
* when replacing an audio file, retain the previous playback settings for
  any layers that depended on the old file
* re-check plugin program setting when a parameter changes -- so a plugin
  can decide to reset the program if the parameters no longer match those
  for the current program
* fix failure to update check-boxes for toggled plugin parameters when their
  parameters are changed by program changes

/* -*- 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 and 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 _WAVE_FILE_MODEL_H_
#define _WAVE_FILE_MODEL_H_

#include "base/Thread.h"
#include <QMutex>
#include <QTimer>

#include "RangeSummarisableTimeValueModel.h"
#include "PowerOfSqrtTwoZoomConstraint.h"

#include <stdlib.h>

class AudioFileReader;

class WaveFileModel : public RangeSummarisableTimeValueModel
{
    Q_OBJECT

public:
    WaveFileModel(QString path);
    WaveFileModel(QString path, QString originalLocation);
    WaveFileModel(QString originalLocation, AudioFileReader *reader);
    ~WaveFileModel();

    bool isOK() const;
    bool isReady(int *) const;

    const ZoomConstraint *getZoomConstraint() const { return &m_zoomConstraint; }

    size_t getFrameCount() const;
    size_t getChannelCount() const;
    size_t getSampleRate() const;

    virtual Model *clone() const;

    float getValueMinimum() const { return -1.0f; }
    float getValueMaximum() const { return  1.0f; }

    virtual size_t getStartFrame() const { return 0; }
    virtual size_t getEndFrame() const { return getFrameCount(); }

    virtual size_t getValues(int channel, size_t start, size_t end,
			     float *buffer) const;

    virtual size_t getValues(int channel, size_t start, size_t end,
			     double *buffer) const;

    virtual void getRanges(size_t channel, size_t start, size_t end,
                           RangeBlock &ranges,
                           size_t &blockSize) const;

    virtual Range getRange(size_t channel, size_t start, size_t end) const;

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

    virtual QString toXmlString(QString indent = "",
				QString extraAttributes = "") const;

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

protected slots:
    void fillTimerTimedOut();
    void cacheFilled();
    
protected:
    void initialize();

    class RangeCacheFillThread : public Thread
    {
    public:
        RangeCacheFillThread(WaveFileModel &model) :
	    m_model(model), m_fillExtent(0),
            m_frameCount(model.getFrameCount()) { }
    
	size_t getFillExtent() const { return m_fillExtent; }
        virtual void run();

    protected:
        WaveFileModel &m_model;
	size_t m_fillExtent;
        size_t m_frameCount;
    };
         
    void fillCache();
    
    QString m_path;
    AudioFileReader *m_reader;
    bool m_myReader;

    RangeBlock m_cache[2]; // interleaved at two base resolutions
    mutable QMutex m_mutex;
    RangeCacheFillThread *m_fillThread;
    QTimer *m_updateTimer;
    size_t m_lastFillExtent;
    bool m_exiting;
    static PowerOfSqrtTwoZoomConstraint m_zoomConstraint;
};    

#endif