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rather than do checkDevices to find new audio devices every 2 seconds, do each check 2 seconds after the previous one has completed. This is done to avoid swamping the thread pool when the check takes a long time

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This commit is contained in:
Seth Alves 2018-10-21 18:48:38 -07:00
parent 5729d35c48
commit 4d34b12f06
1 changed files with 11 additions and 4 deletions
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15
libraries/audio-client/src/AudioClient.cpp
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@ -244,13 +244,20 @@ AudioClient::AudioClient() :
// initialize wasapi; if getAvailableDevices is called from the CheckDevicesThread before this, it will crash
getAvailableDevices(QAudio::AudioInput);
getAvailableDevices(QAudio::AudioOutput);
// start a thread to detect any device changes
_checkDevicesTimer = new QTimer(this);
connect(_checkDevicesTimer, &QTimer::timeout, this, [this] {
QtConcurrent::run(QThreadPool::globalInstance(), [this] { checkDevices(); });
});
const unsigned long DEVICE_CHECK_INTERVAL_MSECS = 2 * 1000;
connect(_checkDevicesTimer, &QTimer::timeout, this, [=] {
QtConcurrent::run(QThreadPool::globalInstance(), [=] {
checkDevices();
// On some systems (Ubuntu) checking all the audio devices can take more than 2 seconds. To
// avoid consuming all of the thread pool, don't start the check interval until the previous
// check has completed.
QMetaObject::invokeMethod(_checkDevicesTimer, "start", Q_ARG(int, DEVICE_CHECK_INTERVAL_MSECS));
});
});
_checkDevicesTimer->setSingleShot(true);
_checkDevicesTimer->start(DEVICE_CHECK_INTERVAL_MSECS);
// start a thread to detect peak value changes