QSound Unavailable

[superutsav]

Hi

I'm trying to use sounds in my application... However, QSound::isAvailable returns a FALSE. QApplication::beep() doesn't work either.
Why is this?? is there any way i can still play sounds?? I am working on a Mandrake 10 machine.

Thanks
superutsav

[wysota]

You have to have Qt compiled with NAS support (and of course have all NAS dependencies installed).

[chombium]

If you don't want to install NAS and recompile QT with nas support you
can use QProcess and start external app that will play the sound file

Example (QT3.x):


the cration of the process

QProcess *AlarmProcess; 
AlarmProcess = new QProcess (this);
AlarmProcess->setArguments("playwave");    // the player
AlarmProcess->addArgument("alarm.wav");    // the file

QProcess *AlarmProcess; 
AlarmProcess = new QProcess (this);
AlarmProcess->setArguments("playwave");    // the player
AlarmProcess->addArgument("alarm.wav");    // the file

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playing

AlarmProcess->start();

AlarmProcess->start();

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stopping

AlarmProcess->tryTerminate(); // it actualy waits for the process to finish
                                              // then it terminates

AlarmProcess->tryTerminate(); // it actualy waits for the process to finish
                                              // then it terminates

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you can also use:

AlarmProcess->Terminate();

AlarmProcess->Terminate();

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but it terminates the process immediately, and the memory used might not be cleaned completely.

If you need to play the sound repeatedly you should connect the processExited() signal

connect( AlarmProcess, SIGNAL(processExited()),
            this, SLOT(exitedSlot()) );

connect( AlarmProcess, SIGNAL(processExited()),
            this, SLOT(exitedSlot()) );

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and to implement the signal hendler

void FormMain::exitedSlot()
{
    if (AlmSound)  // flag - should the sound be played again
 AlarmProcess->start();
}

void FormMain::exitedSlot()
{
    if (AlmSound)  // flag - should the sound be played again
 AlarmProcess->start();
}

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Cheers, chombium