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Merge pull request #4322 from AndrewMeadows/thermonuclear

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workaround for scratchy audio on Windows
This commit is contained in:
Clément Brisset 2015-02-23 07:18:30 -08:00
commit c6b1375863
3 changed files with 16 additions and 15 deletions
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2
interface/src/audio/AudioScope.h
View file

@ -75,4 +75,4 @@ private:
};
#endif // hifi_AudioScope_h
#endif // hifi_AudioScope_h

23
libraries/audio-client/src/AudioClient.cpp
View file

@ -85,16 +85,9 @@ AudioClient::AudioClient() :
_isStereoInput(false),
_outputStarveDetectionStartTimeMsec(0),
_outputStarveDetectionCount(0),
_outputBufferSizeFrames("audioOutputBufferSize",
DEFAULT_MAX_FRAMES_OVER_DESIRED),
#ifdef Q_OS_ANDROID
_outputStarveDetectionEnabled("audioOutputStarveDetectionEnabled",
false),
#else
_outputBufferSizeFrames("audioOutputBufferSize", DEFAULT_AUDIO_OUTPUT_BUFFER_SIZE_FRAMES),
_outputStarveDetectionEnabled("audioOutputStarveDetectionEnabled",
DEFAULT_AUDIO_OUTPUT_STARVE_DETECTION_ENABLED),
#endif
_outputStarveDetectionPeriodMsec("audioOutputStarveDetectionPeriod",
DEFAULT_AUDIO_OUTPUT_STARVE_DETECTION_PERIOD),
_outputStarveDetectionThreshold("audioOutputStarveDetectionThreshold",
@ -1090,19 +1083,23 @@ void AudioClient::outputNotify() {
if (recentUnfulfilled > 0) {
if (_outputStarveDetectionEnabled.get()) {
quint64 now = usecTimestampNow() / 1000;
quint64 dt = now - _outputStarveDetectionStartTimeMsec;
int dt = (int)(now - _outputStarveDetectionStartTimeMsec);
if (dt > _outputStarveDetectionPeriodMsec.get()) {
_outputStarveDetectionStartTimeMsec = now;
_outputStarveDetectionCount = 0;
} else {
_outputStarveDetectionCount += recentUnfulfilled;
if (_outputStarveDetectionCount > _outputStarveDetectionThreshold.get()) {
int newOutputBufferSizeFrames = _outputBufferSizeFrames.get() + 1;
qDebug() << "Starve detection threshold met, increasing buffer size to " << newOutputBufferSizeFrames;
setOutputBufferSize(newOutputBufferSizeFrames);
_outputStarveDetectionStartTimeMsec = now;
_outputStarveDetectionCount = 0;
int oldOutputBufferSizeFrames = _outputBufferSizeFrames.get();
int newOutputBufferSizeFrames = oldOutputBufferSizeFrames + 1;
setOutputBufferSize(newOutputBufferSizeFrames);
newOutputBufferSizeFrames = _outputBufferSizeFrames.get();
if (newOutputBufferSizeFrames > oldOutputBufferSizeFrames) {
qDebug() << "Starve detection threshold met, increasing buffer size to " << newOutputBufferSizeFrames;
}
}
}
}

6
libraries/audio-client/src/AudioClient.h
View file

@ -57,7 +57,11 @@ static const int NUM_AUDIO_CHANNELS = 2;
static const int DEFAULT_AUDIO_OUTPUT_BUFFER_SIZE_FRAMES = 3;
static const int MIN_AUDIO_OUTPUT_BUFFER_SIZE_FRAMES = 1;
static const int MAX_AUDIO_OUTPUT_BUFFER_SIZE_FRAMES = 20;
static const int DEFAULT_AUDIO_OUTPUT_STARVE_DETECTION_ENABLED = true;
#if defined(Q_OS_ANDROID) || defined(Q_OS_WIN)
static const int DEFAULT_AUDIO_OUTPUT_STARVE_DETECTION_ENABLED = false;
#else
static const int DEFAULT_AUDIO_OUTPUT_STARVE_DETECTION_ENABLED = true;
#endif
static const int DEFAULT_AUDIO_OUTPUT_STARVE_DETECTION_THRESHOLD = 3;
static const quint64 DEFAULT_AUDIO_OUTPUT_STARVE_DETECTION_PERIOD = 10 * 1000; // 10 Seconds