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use QTimer to clock broadcastAvatarData method

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This commit is contained in:
Stephen Birarda 2014-03-25 13:50:22 -07:00
parent 4e77afb4b2
commit 0407c6d324
1 changed files with 59 additions and 76 deletions
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135
assignment-client/src/avatars/AvatarMixer.cpp
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@ -14,6 +14,7 @@
#include <QtCore/QDateTime>
#include <QtCore/QJsonObject>
#include <QtCore/QTimer>
#include <QtCore/QThread>
#include <Logging.h>
#include <NodeList.h>
@ -27,7 +28,7 @@
const QString AVATAR_MIXER_LOGGING_NAME = "avatar-mixer";
const unsigned int AVATAR_DATA_SEND_INTERVAL_USECS = (1 / 60.0) * 1000 * 1000;
const unsigned int AVATAR_DATA_SEND_INTERVAL_MSECS = (1.0f / 60.0f) * 1000;
AvatarMixer::AvatarMixer(const QByteArray& packet) :
ThreadedAssignment(packet),
@ -55,6 +56,58 @@ const float BILLBOARD_AND_IDENTITY_SEND_PROBABILITY = 1.0f / 300.0f;
// 1) use the view frustum to cull those avatars that are out of view. Since avatar data doesn't need to be present
// if the avatar is not in view or in the keyhole.
void AvatarMixer::broadcastAvatarData() {
int idleTime = QDateTime::currentMSecsSinceEpoch() - _lastFrameTimestamp;
++_numStatFrames;
const float STRUGGLE_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD = 0.10f;
const float BACK_OFF_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD = 0.20f;
const float RATIO_BACK_OFF = 0.02f;
const int TRAILING_AVERAGE_FRAMES = 100;
int framesSinceCutoffEvent = TRAILING_AVERAGE_FRAMES;
const float CURRENT_FRAME_RATIO = 1.0f / TRAILING_AVERAGE_FRAMES;
const float PREVIOUS_FRAMES_RATIO = 1.0f - CURRENT_FRAME_RATIO;
_trailingSleepRatio = (PREVIOUS_FRAMES_RATIO * _trailingSleepRatio)
+ (idleTime * CURRENT_FRAME_RATIO / (float) AVATAR_DATA_SEND_INTERVAL_MSECS);
float lastCutoffRatio = _performanceThrottlingRatio;
bool hasRatioChanged = false;
if (framesSinceCutoffEvent >= TRAILING_AVERAGE_FRAMES) {
if (_trailingSleepRatio <= STRUGGLE_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD) {
// we're struggling - change our min required loudness to reduce some load
_performanceThrottlingRatio = _performanceThrottlingRatio + (0.5f * (1.0f - _performanceThrottlingRatio));
qDebug() << "Mixer is struggling, sleeping" << _trailingSleepRatio * 100 << "% of frame time. Old cutoff was"
<< lastCutoffRatio << "and is now" << _performanceThrottlingRatio;
hasRatioChanged = true;
} else if (_trailingSleepRatio >= BACK_OFF_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD && _performanceThrottlingRatio != 0) {
// we've recovered and can back off the required loudness
_performanceThrottlingRatio = _performanceThrottlingRatio - RATIO_BACK_OFF;
if (_performanceThrottlingRatio < 0) {
_performanceThrottlingRatio = 0;
}
qDebug() << "Mixer is recovering, sleeping" << _trailingSleepRatio * 100 << "% of frame time. Old cutoff was"
<< lastCutoffRatio << "and is now" << _performanceThrottlingRatio;
hasRatioChanged = true;
}
if (hasRatioChanged) {
framesSinceCutoffEvent = 0;
}
}
if (!hasRatioChanged) {
++framesSinceCutoffEvent;
}
static QByteArray mixedAvatarByteArray;
int numPacketHeaderBytes = populatePacketHeader(mixedAvatarByteArray, PacketTypeBulkAvatarData);
@ -246,80 +299,10 @@ void AvatarMixer::run() {
nodeList->linkedDataCreateCallback = attachAvatarDataToNode;
int nextFrame = 0;
timeval startTime;
// setup and start a timer to broadcast avatar data
QTimer* broadcastTimer = new QTimer(this);
broadcastTimer->setInterval(AVATAR_DATA_SEND_INTERVAL_MSECS);
gettimeofday(&startTime, NULL);
int usecToSleep = AVATAR_DATA_SEND_INTERVAL_USECS;
const int TRAILING_AVERAGE_FRAMES = 100;
int framesSinceCutoffEvent = TRAILING_AVERAGE_FRAMES;
while (!_isFinished) {
++_numStatFrames;
const float STRUGGLE_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD = 0.10f;
const float BACK_OFF_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD = 0.20f;
const float RATIO_BACK_OFF = 0.02f;
const float CURRENT_FRAME_RATIO = 1.0f / TRAILING_AVERAGE_FRAMES;
const float PREVIOUS_FRAMES_RATIO = 1.0f - CURRENT_FRAME_RATIO;
if (usecToSleep < 0) {
usecToSleep = 0;
}
_trailingSleepRatio = (PREVIOUS_FRAMES_RATIO * _trailingSleepRatio)
+ (usecToSleep * CURRENT_FRAME_RATIO / (float) AVATAR_DATA_SEND_INTERVAL_USECS);
float lastCutoffRatio = _performanceThrottlingRatio;
bool hasRatioChanged = false;
if (framesSinceCutoffEvent >= TRAILING_AVERAGE_FRAMES) {
if (_trailingSleepRatio <= STRUGGLE_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD) {
// we're struggling - change our min required loudness to reduce some load
_performanceThrottlingRatio = _performanceThrottlingRatio + (0.5f * (1.0f - _performanceThrottlingRatio));
qDebug() << "Mixer is struggling, sleeping" << _trailingSleepRatio * 100 << "% of frame time. Old cutoff was"
<< lastCutoffRatio << "and is now" << _performanceThrottlingRatio;
hasRatioChanged = true;
} else if (_trailingSleepRatio >= BACK_OFF_TRIGGER_SLEEP_PERCENTAGE_THRESHOLD && _performanceThrottlingRatio != 0) {
// we've recovered and can back off the required loudness
_performanceThrottlingRatio = _performanceThrottlingRatio - RATIO_BACK_OFF;
if (_performanceThrottlingRatio < 0) {
_performanceThrottlingRatio = 0;
}
qDebug() << "Mixer is recovering, sleeping" << _trailingSleepRatio * 100 << "% of frame time. Old cutoff was"
<< lastCutoffRatio << "and is now" << _performanceThrottlingRatio;
hasRatioChanged = true;
}
if (hasRatioChanged) {
framesSinceCutoffEvent = 0;
}
}
if (!hasRatioChanged) {
++framesSinceCutoffEvent;
}
broadcastAvatarData();
QCoreApplication::processEvents();
if (_isFinished) {
break;
}
usecToSleep = usecTimestamp(&startTime) + (++nextFrame * AVATAR_DATA_SEND_INTERVAL_USECS) - usecTimestampNow();
if (usecToSleep > 0) {
usleep(usecToSleep);
}
}
connect(broadcastTimer, &QTimer::timeout, this, &AvatarMixer::broadcastAvatarData);
broadcastTimer->start();
}