Sound Example

This example shows how easy it is to play sounds, e.g. .WAV files, if your machine is set up to play audio.

Header file:

/****************************************************************************
** $Id: qt/sound.h   3.3.7   edited Aug 31 2005 $
**
** Copyright (C) 1992-2005 Trolltech AS.  All rights reserved.
**
** This file is part of an example program for Qt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#ifndef PLAY_H
#define PLAY_H

#include "qsound.h"
#include <qmainwindow.h>

class SoundPlayer : public QMainWindow {
    Q_OBJECT
public:
    SoundPlayer();

public slots:
    void doPlay1();
    void doPlay2();
    void doPlay3();
    void doPlay4();
    void doPlay34();
    void doPlay1234();

private:
    QSound bucket3;
    QSound bucket4;
};

#endif

Implementation:

/****************************************************************************
** $Id: qt/sound.cpp   3.3.7   edited Aug 31 2005 $
**
** Copyright (C) 1992-2005 Trolltech AS.  All rights reserved.
**
** This file is part of an example program for Qt.  This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
//
// Very simple example of QSound::play(filename)
//
// 99% of this program is just boilerplate Qt code to put up a nice
// window so you think something special is happening.
//

#include "sound.h"
#include <qapplication.h>
#include <qmessagebox.h>
#include <qmenubar.h>

SoundPlayer::SoundPlayer() :
    QMainWindow(),
    bucket3("sounds/3.wav"),
    bucket4("sounds/4.wav")
{
    if (!QSound::isAvailable()) {
        // Bail out.  Programs in which sound is not critical
        // could just silently (hehe) ignore the lack of a server.
        //
        QMessageBox::warning(this,"No Sound",
                "<p><b>Sorry, you are not running the Network Audio System.</b>"
                "<p>If you have the `au' command, run it in the background before this program. "
                "The latest release of the Network Audio System can be obtained from:"
                "<pre>\n"
                " &nbsp;\n"
                "   ftp.ncd.com:/pub/ncd/technology/src/nas\n"
                "   ftp.x.org:/contrib/audio/nas\n"
                "</pre>"
                "<p>Release 1.2 of NAS is also included with the X11R6"
                "contrib distribution."
                "<p>After installing NAS, you will then need to reconfigure Qt with NAS sound support");
    }

    QPopupMenu *file = new QPopupMenu;
    file->insertItem("Play &1",  this, SLOT(doPlay1()), CTRL+Key_1);
    file->insertItem("Play &2",  this, SLOT(doPlay2()), CTRL+Key_2);
    file->insertItem("Play from bucket &3",  this, SLOT(doPlay3()), CTRL+Key_3);
    file->insertItem("Play from bucket &4",  this, SLOT(doPlay4()), CTRL+Key_4);
    file->insertSeparator();
    file->insertItem("Play 3 and 4 together",  this, SLOT(doPlay34()));
    file->insertItem("Play all together",  this, SLOT(doPlay1234()));
    file->insertSeparator();
    file->insertItem("E&xit",  qApp, SLOT(quit()));
    menuBar()->insertItem("&File", file);
}

void SoundPlayer::doPlay1()
{
    QSound::play("sounds/1.wav");
}

void SoundPlayer::doPlay2()
{
    QSound::play("sounds/2.wav");
}

void SoundPlayer::doPlay3()
{
    bucket3.play();
}

void SoundPlayer::doPlay4()
{
    bucket4.play();
}

void SoundPlayer::doPlay34()
{
    // Some sound platforms will only play one sound at a time
    bucket3.play();
    bucket4.play();
}

void SoundPlayer::doPlay1234()
{
    // Some sound platforms will only play one sound at a time
    QSound::play("sounds/1.wav");
    QSound::play("sounds/2.wav");
    bucket3.play();
    bucket4.play();
}

int main(int argc, char** argv)
{
    QApplication app(argc,argv);
    SoundPlayer sp;
    app.setMainWidget(&sp);
    sp.setCaption("Qt Example - Sounds");
    sp.show();
    return app.exec();
}

See also Examples.