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  1. Qt
  2. QTBUG-95352

QAudioDecoder::error signal is not called

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    • Icon: Bug Bug
    • Resolution: Invalid
    • Icon: Not Evaluated Not Evaluated
    • None
    • 6.2.0 Beta1
    • Multimedia
    • None
    • macOS

      not tested yet on windows

      I connect the error handler thusly:

      ASSERT(connect(&m_decoder, static_cast<void (QAudioDecoder::*)(QAudioDecoder::Error)>(&QAudioDecoder::error), this, &AudioFileStream::handle_error));

      note the function signature in QAudioDecoder is this:

      void error(QAudioDecoder::Error error);

      but the signal sent is this:

      void AVFAudioDecoder::processInvalidMedia(QAudioDecoder::Error errorCode, const QString& errorString)
{
    stop();
    emit error(int(errorCode), errorString);
}

      so it seems to be emitting a signal to a wrong function definition.

      Update:

      I was able to step into the "emit" call and ended up here:

      void QPlatformAudioDecoder::error(int error, const QString &errorString)
{
    if (error == m_error && errorString == m_errorString)
        return;
    m_error = QAudioDecoder::Error(error);
    m_errorString = errorString;
    setIsDecoding(false);

    emit q->error(m_error);
}

      and it seems that "q" is a "queued" signal handler, not a direct one, so I can't step through that to the slot.

      But I can assure you, my correctly-connected error slot is never invoked.

      Note that this happens when trying to play an mp3 file, which really should work in any case, so perhaps that's yet another bug?

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            dorisverria Doris Verria
            davecotter David M. Cotter
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              Created:
              Updated:
              Resolved:

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