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Attempt to reduce audio latency. Unsuccessfully.

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This commit is contained in:
Thomas Harte 2020-06-08 21:30:35 -04:00
parent d027450502
commit bcb23d9a15
1 changed files with 9 additions and 1 deletions
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10
OSBindings/Qt/mainwindow.cpp
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@ -166,8 +166,16 @@ void MainWindow::launchMachine() {
idealFormat.setSampleSize(audioIs8bit ? 8 : 16);
audioOutput = std::make_unique<QAudioOutput>(idealFormat, this);
// Start the output.
// Start the output. setBufferSize is supposed to set the audio buffer size, but
// appears not to work properly on macOS; experimenting with this on that platform
// revealed that setting the buffer size to 1024, then reading it back to find out
// what I actually got results in 2048. If I use a QIODevice-based audio output,
// i.e. one that pulls data as required, it then pulls in units of... 16384 bytes.
// That's almost 1/6th of a second — epic latency.
//
// So I have no idea. TODO: find an alternative audio library, I guess.
speaker->set_delegate(this);
audioOutput->setBufferSize(samplesPerBuffer * sizeof(int16_t));
audioIODevice = audioOutput->start();
}
}