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Forum Update on Monday, May 27th 2025

QAudioOutput infinite loop

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  • J Offline
    J Offline
    Jojo
    wrote on 25 Mar 2015, 17:01 last edited by
    #1

    Hello @ all,

    I'm sorry for the bad english
    Here's my problem:

    I have a class which plays a sound wave with a QBuffer as QIODevice, a QBytearray as wave buffer and a QAudioOutput, but only for limited time.
    For my program the soundwave must play 'forever' until I stop it.
    But while playing, I must be able to edit the wave.

    Do you have a solution for this problem?

    Thanks for all answers!

    Jo

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    • S Offline
      S Offline
      SGaist
      Lifetime Qt Champion
      wrote on 25 Mar 2015, 23:35 last edited by
      #2

      Hi and welcome to devnet,

      Why not have e.g a QTimer calling a function generating the audio data ? It could also be done in a secondary thread.

      Hope it helps

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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      • J Offline
        J Offline
        Jojo
        wrote on 26 Mar 2015, 15:57 last edited by
        #3

        Thanks for your answer.
        I'll try it and give you a reply

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        • B Offline
          B Offline
          BRULE Herman
          wrote on 20 Jun 2019, 01:30 last edited by
          #4

          Hi,
          My solution, reimplement QBuffer::read():
          https://github.com/alphaonex86/CatchChallenger/blob/master/client/base/QInfiniteBuffer.cpp
          https://github.com/alphaonex86/CatchChallenger/blob/master/client/base/QInfiniteBuffer.h
          Work well to do an audio loop.
          Cheers,

          Developer of Ultracopier/Supercopier and of the game CatchChallenger, CEO of DataCenter/ISP Confiared

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