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Re-implement the continuous detection of device changes for all platforms, using a background thread. This prevents the glitches caused by calling checkDevices() on the audio processing thread.

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This commit is contained in:
Ken Cooke 2016-08-20 12:22:47 -07:00
parent 3583bdecbb
commit 4b2778f02d
2 changed files with 34 additions and 10 deletions
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41
libraries/audio-client/src/AudioClient.cpp
View file

@ -67,6 +67,33 @@ Setting::Handle<int> windowSecondsForDesiredReduction("windowSecondsForDesiredRe
DEFAULT_WINDOW_SECONDS_FOR_DESIRED_REDUCTION);
Setting::Handle<bool> repetitionWithFade("repetitionWithFade", DEFAULT_REPETITION_WITH_FADE);
// background thread that continuously polls for device changes
class CheckDevicesThread : public QThread {
public:
const unsigned long DEVICE_CHECK_INTERVAL_MSECS = 2 * 1000;
CheckDevicesThread(AudioClient* audioClient)
: _audioClient(audioClient) {
connect(qApp, &QCoreApplication::aboutToQuit, [this] {
_quit = true;
});
}
void run() override {
while (!_quit) {
//qDebug() << "Checking for audio device changes...";
_audioClient->checkDevices();
QThread::msleep(DEVICE_CHECK_INTERVAL_MSECS);
}
}
AudioClient* _audioClient { nullptr };
bool _quit { false };
};
AudioClient::AudioClient() :
AbstractAudioInterface(),
_audioInput(NULL),
@ -121,14 +148,14 @@ AudioClient::AudioClient() :
connect(&_receivedAudioStream, &InboundAudioStream::mismatchedAudioCodec, this, &AudioClient::handleMismatchAudioFormat);
_inputDevices = getDeviceNames(QAudio::AudioInput);
_outputDevices = getDeviceNames(QAudio::AudioOutput);
const qint64 DEVICE_CHECK_INTERVAL_MSECS = 2 * 1000;
QTimer* updateTimer = new QTimer(this);
connect(updateTimer, &QTimer::timeout, this, &AudioClient::checkDevices);
updateTimer->start(DEVICE_CHECK_INTERVAL_MSECS);
// start a thread to detect any device changes
QThread* checkDevicesThread = new CheckDevicesThread(this);
checkDevicesThread->setObjectName("CheckDevices Thread");
checkDevicesThread->setPriority(QThread::LowPriority);
checkDevicesThread->start();
configureReverb();
@ -1349,9 +1376,6 @@ qint64 AudioClient::AudioOutputIODevice::readData(char * data, qint64 maxSize) {
}
void AudioClient::checkDevices() {
# if defined(Q_OS_LINUX) || defined (Q_OS_WIN)
// on Windows and Linux, this causes dropouts in the audio stream
# else
QVector<QString> inputDevices = getDeviceNames(QAudio::AudioInput);
QVector<QString> outputDevices = getDeviceNames(QAudio::AudioOutput);
@ -1361,7 +1385,6 @@ void AudioClient::checkDevices() {
emit deviceChanged();
}
# endif
}
void AudioClient::loadSettings() {

3
libraries/audio-client/src/AudioClient.h
View file

@ -139,6 +139,8 @@ public:
QVector<AudioInjector*>& getActiveLocalAudioInjectors() { return _activeLocalAudioInjectors; }
void checkDevices();
static const float CALLBACK_ACCELERATOR_RATIO;
#ifdef Q_OS_WIN
@ -312,7 +314,6 @@ private:
QVector<QString> _inputDevices;
QVector<QString> _outputDevices;
void checkDevices();
bool _hasReceivedFirstPacket = false;