SampleBuffer.h

Go to the documentation of this file.

/*************************************************************************
         SampleBuffer.h  -  simple buffer for sample arrays
                             -------------------
    begin                : Sun Oct 17 2010
    copyright            : (C) 2010 by Thomas Eschenbacher
    email                : Thomas.Eschenbacher@gmx.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef SAMPLE_BUFFER_H
#define SAMPLE_BUFFER_H

#include "config.h"

#include <QObject>
#include <QSemaphore>

#include "libkwave/SampleArray.h"
#include "libkwave/SampleSink.h"

//***************************************************************************
namespace Kwave
{

    class Q_DECL_EXPORT SampleBuffer: public Kwave::SampleSink
    {
        Q_OBJECT
    public:

        SampleBuffer(QObject *parent = Q_NULLPTR);

        virtual ~SampleBuffer();

        virtual bool isEmpty() const;

        virtual Kwave::SampleArray &data();

        virtual const Kwave::SampleArray &constData() const;

        virtual unsigned int available() const;

        virtual const sample_t *get(unsigned int len);

        void put(sample_t sample);

        virtual void finished();

    public slots:

        virtual void input(Kwave::SampleArray data);

    protected:

        friend class BufferJob;

        void emitData(Kwave::SampleArray data);

    private:

        void enqueue(Kwave::SampleArray data);

    signals:

        void output(Kwave::SampleArray data);

    private:

        Kwave::SampleArray m_data;

        unsigned int m_offset;

        unsigned int m_buffered;

        QSemaphore m_sema;
    };

}

#endif /* SAMPLE_BUFFER_H */

//***************************************************************************
//***************************************************************************