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audiodevice.h

This is the verbatim text of the audiodevice.h include file. It is provided only for illustration; the copyright remains with Trolltech.

/**********************************************************************
** Copyright (C) 2000-2005 Trolltech AS.  All rights reserved.
**
** This file is part of the Qtopia Environment.
**
** Licensees holding a valid license agreement from Trolltech or any of its
** authorized distributors may use this file in accordance with
** the License Agreement provided with the Licensed Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Trolltech's Commercial License Agreements.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef AUDIODEVICE_H
#define AUDIODEVICE_H


#include <qobject.h>


class AudioDevicePrivate;


class AudioDevice : public QObject {
    Q_OBJECT
public:
    AudioDevice(QObject *parent=0, const char *name=0);
    ~AudioDevice();

    void open(unsigned int freq = 44000, unsigned int channels = 2, unsigned int bytesPerSample = 2, bool needCompletedSignal = true);
    void close();

    unsigned int canWrite() const;
    bool write( char *buffer, unsigned int length );
    int bytesWritten();

    unsigned int channels() const;
    unsigned int frequency() const;
    unsigned int bytesPerSample() const;
    unsigned int bufferSize() const;

    // Each volume level is from 0 to 0xFFFF
    static void volume(int &left, int &right);
    static void setVolume(int left, int right);

    static bool muted();
    static void setMuted(bool);

    static void increaseVolume() { int l,r; volume(l,r); setVolume(l+1968,r+1968); }
    static void decreaseVolume() { int l,r; volume(l,r); setVolume(l-1966,r-1966); }

public slots:
    void volumeChanged( bool muted );

signals:
    void completedIO();
    void deviceReady();
    void deviceOpenError();

private:
    AudioDevicePrivate *d;
};


#endif // AUDIODEVICE_H