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Thread: QSound Unavailable

  1. #1
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    Default QSound Unavailable

    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
    Last edited by superutsav; 29th January 2006 at 05:03. Reason: Typo
    He who laughs last thinks slowest.

  2. #2
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    Default Re: QSound Unavailable

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

  3. #3
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    Default Re: QSound Unavailable

    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
    Qt Code:
    1. QProcess *AlarmProcess;
    2. AlarmProcess = new QProcess (this);
    3. AlarmProcess->setArguments("playwave"); // the player
    4. AlarmProcess->addArgument("alarm.wav"); // the file
    To copy to clipboard, switch view to plain text mode 

    playing
    Qt Code:
    1. AlarmProcess->start();
    To copy to clipboard, switch view to plain text mode 

    stopping
    Qt Code:
    1. AlarmProcess->tryTerminate(); // it actualy waits for the process to finish
    2. // then it terminates
    To copy to clipboard, switch view to plain text mode 

    you can also use:
    Qt Code:
    1. AlarmProcess->Terminate();
    To copy to clipboard, switch view to plain text mode 
    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
    Qt Code:
    1. connect( AlarmProcess, SIGNAL(processExited()),
    2. this, SLOT(exitedSlot()) );
    To copy to clipboard, switch view to plain text mode 

    and to implement the signal hendler
    Qt Code:
    1. void FormMain::exitedSlot()
    2. {
    3. if (AlmSound) // flag - should the sound be played again
    4. AlarmProcess->start();
    5. }
    To copy to clipboard, switch view to plain text mode 

    Cheers, chombium

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