view data/model/WritableWaveFileModel.h @ 316:3a6725f285d6

* Make RemoteFile far more pervasive, and use it for local files as well
  so that we can handle both transparently.  Make it shallow copy with
  reference counting, so it can be used by value without having to worry
  about the cache file lifetime.  Use RemoteFile for MainWindow file-open
  functions, etc

/* -*- 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 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 _WRITABLE_WAVE_FILE_MODEL_H_
#define _WRITABLE_WAVE_FILE_MODEL_H_

#include "WaveFileModel.h"

class WavFileWriter;
class WavFileReader;

class WritableWaveFileModel : public RangeSummarisableTimeValueModel
{
    Q_OBJECT

public:
    WritableWaveFileModel(size_t sampleRate, size_t channels, QString path = "");
    ~WritableWaveFileModel();

    /**
     * Call addSamples to append a block of samples to the end of the
     * file.  Caller should also call setCompletion to update the
     * progress of this file, if it has a known end point, and should
     * call setCompletion(100) when the file has been written.
     */
    virtual bool addSamples(float **samples, size_t count);
    
    bool isOK() const;
    bool isReady(int *) const;

    virtual void setCompletion(int completion); // percentage
    virtual int getCompletion() const { return m_completion; }

    const ZoomConstraint *getZoomConstraint() const {
        static PowerOfSqrtTwoZoomConstraint zc;
        return &zc;
    }

    size_t getFrameCount() const;
    size_t getChannelCount() const { return m_channels; }
    size_t getSampleRate() const { return m_sampleRate; }

    virtual Model *clone() const;

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

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

    void setStartFrame(size_t startFrame);

    virtual size_t getData(int channel, size_t start, size_t count,
                           float *buffer) const;

    virtual size_t getData(int channel, size_t start, size_t count,
                           double *buffer) const;

    virtual void getSummaries(size_t channel, size_t start, size_t count,
                              RangeBlock &ranges, size_t &blockSize) const;

    virtual Range getSummary(size_t channel, size_t start, size_t count) const;

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

protected:
    WaveFileModel *m_model;
    WavFileWriter *m_writer;
    WavFileReader *m_reader;
    size_t m_sampleRate;
    size_t m_channels;
    size_t m_frameCount;
    size_t m_startFrame;
    int m_completion;
};

#endif