show avatar data receive rate by default with display name

interface/src/avatar/Avatar.cpp

@@ -581,7 +581,8 @@ void Avatar::renderBillboard() {
     glm::vec2 texCoordTopLeft(0.0f, 0.0f);
     glm::vec2 texCoordBottomRight(1.0f, 1.0f);
 
-    DependencyManager::get<GeometryCache>()->renderQuad(topLeft, bottomRight, texCoordTopLeft, texCoordBottomRight, glm::vec4(1.0f, 1.0f, 1.0f, 1.0f));
+    DependencyManager::get<GeometryCache>()->renderQuad(topLeft, bottomRight, texCoordTopLeft, texCoordBottomRight, 
+                                                        glm::vec4(1.0f, 1.0f, 1.0f, 1.0f));
     
     glPopMatrix();
     
@@ -709,11 +710,22 @@ void Avatar::renderDisplayName() {
             glm::vec4(0.2f, 0.2f, 0.2f, _displayNameAlpha * DISPLAYNAME_BACKGROUND_ALPHA / DISPLAYNAME_ALPHA));
    
     glm::vec4 color(0.93f, 0.93f, 0.93f, _displayNameAlpha);
+    
+    // optionally render timing stats for this avatar with the display name
+    QString renderedDisplayName = _displayName;
+
+    const float BYTES_PER_KILOBYTE = 1000.0f;
+    float kilobytesPerSecond = getAverageBytesReceivedPerSecond() / BYTES_PER_KILOBYTE;
+    
+    renderedDisplayName += QString(" - (%1 KBps, %2 Hz)")
+                                  .arg(QString::number(kilobytesPerSecond, 'f', 2))
+                                  .arg(getReceiveRate());
+
     QByteArray ba = _displayName.toLocal8Bit();
     const char* text = ba.data();
     
     glDisable(GL_POLYGON_OFFSET_FILL);
-    textRenderer(DISPLAYNAME)->draw(text_x, text_y, text, color);
+    textRenderer(DISPLAYNAME)->draw(text_x, text_y, renderedDisplayName, color);
 
     glPopMatrix();
 

libraries/avatars/src/AvatarData.cpp

@@ -58,11 +58,11 @@ AvatarData::AvatarData() :
     _billboard(),
     _errorLogExpiry(0),
     _owningAvatarMixer(),
-    _lastUpdateTimer(),
     _velocity(0.0f),
     _targetVelocity(0.0f),
     _localAABox(DEFAULT_LOCAL_AABOX_CORNER, DEFAULT_LOCAL_AABOX_SCALE)
 {
+
 }
 
 AvatarData::~AvatarData() {
@@ -268,9 +268,6 @@ bool AvatarData::shouldLogError(const quint64& now) {
 // read data in packet starting at byte offset and return number of bytes parsed
 int AvatarData::parseDataAtOffset(const QByteArray& packet, int offset) {
     
-    // reset the last heard timer since we have new data for this AvatarData
-    _lastUpdateTimer.restart();
-    
     // lazily allocate memory for HeadData in case we're not an Avatar instance
     if (!_headData) {
         _headData = new HeadData(this);
@@ -555,7 +552,17 @@ int AvatarData::parseDataAtOffset(const QByteArray& packet, int offset) {
         }
     } // numJoints * 8 bytes
     
-    return sourceBuffer - startPosition;
+    int numBytesRead = sourceBuffer - startPosition;
+    _averageBytesReceived.updateAverage(numBytesRead); 
+    return numBytesRead;
+}
+
+int AvatarData::getAverageBytesReceivedPerSecond() const {
+    return lrint(_averageBytesReceived.getAverageSampleValuePerSecond()); 
+}
+
+int AvatarData::getReceiveRate() const {
+    return lrint(1.0f / _averageBytesReceived.getEventDeltaAverage()); 
 }
 
 bool AvatarData::hasReferential() {

libraries/avatars/src/AvatarData.h

@@ -46,9 +46,9 @@ typedef unsigned long long quint64;
 #include <QReadWriteLock>
 
 #include <CollisionInfo.h>
-#include <RegisteredMetaTypes.h>
-
 #include <Node.h>
+#include <RegisteredMetaTypes.h>
+#include <SimpleMovingAverage.h>
 
 #include "AABox.h"
 #include "HandData.h"
@@ -293,11 +293,13 @@ public:
     Node* getOwningAvatarMixer() { return _owningAvatarMixer.data(); }
     void setOwningAvatarMixer(const QWeakPointer<Node>& owningAvatarMixer) { _owningAvatarMixer = owningAvatarMixer; }
     
-    QElapsedTimer& getLastUpdateTimer() { return _lastUpdateTimer; }
-     
     const AABox& getLocalAABox() const { return _localAABox; }
     const Referential* getReferential() const { return _referential; }
 
+    int getUsecsSinceLastUpdate() const { return _averageBytesReceived.getUsecsSinceLastEvent(); }
+    int getAverageBytesReceivedPerSecond() const;
+    int getReceiveRate() const;
+
     void setVelocity(const glm::vec3 velocity) { _velocity = velocity; }
     Q_INVOKABLE glm::vec3 getVelocity() const { return _velocity; }
     glm::vec3 getTargetVelocity() const { return _targetVelocity; }
@@ -382,7 +384,6 @@ protected:
     quint64 _errorLogExpiry; ///< time in future when to log an error
     
     QWeakPointer<Node> _owningAvatarMixer;
-    QElapsedTimer _lastUpdateTimer;
     
     PlayerPointer _player;
     
@@ -395,6 +396,8 @@ protected:
 
     AABox _localAABox;
 
+    SimpleMovingAverage _averageBytesReceived {};
+
 private:
     // privatize the copy constructor and assignment operator so they cannot be called
     AvatarData(const AvatarData&);

libraries/avatars/src/AvatarHashMap.cpp

@@ -25,11 +25,11 @@ AvatarHash::iterator AvatarHashMap::erase(const AvatarHash::iterator& iterator)
     return _avatarHash.erase(iterator);
 }
 
-const qint64 AVATAR_SILENCE_THRESHOLD_MSECS = 5 * 1000;
+const qint64 AVATAR_SILENCE_THRESHOLD_USECS = 5 * 1000 * 1000;
 
 bool AvatarHashMap::shouldKillAvatar(const AvatarSharedPointer& sharedAvatar) {
     return (sharedAvatar->getOwningAvatarMixer() == NULL
-            || sharedAvatar->getLastUpdateTimer().elapsed() > AVATAR_SILENCE_THRESHOLD_MSECS);
+            || sharedAvatar->getUsecsSinceLastUpdate() > AVATAR_SILENCE_THRESHOLD_USECS);
 }
 
 void AvatarHashMap::processAvatarMixerDatagram(const QByteArray& datagram, const QWeakPointer<Node>& mixerWeakPointer) {

libraries/shared/src/SimpleMovingAverage.cpp

@@ -52,9 +52,9 @@ void SimpleMovingAverage::reset() {
 
 float SimpleMovingAverage::getEventDeltaAverage() const {
     return (ONE_MINUS_WEIGHTING * _eventDeltaAverage) +
-        (WEIGHTING * ((usecTimestampNow() - _lastEventTimestamp) / 1000000.0f));
+        (WEIGHTING * ((usecTimestampNow() - _lastEventTimestamp) / 1000000.0f ));
 }
 
-float SimpleMovingAverage::getAverageSampleValuePerSecond() const {
-    return _average * (1.0f / getEventDeltaAverage());
+uint64_t SimpleMovingAverage::getUsecsSinceLastEvent() const {
+    return usecTimestampNow() - _lastEventTimestamp; 
 }

libraries/shared/src/SimpleMovingAverage.h

@@ -25,8 +25,11 @@ public:
     
     int getSampleCount() const { return _numSamples; };
     float getAverage() const { return _average; };
-    float getEventDeltaAverage() const;
-    float getAverageSampleValuePerSecond() const;
+    float getEventDeltaAverage() const; // returned in microseconds
+    float getAverageSampleValuePerSecond() const { return _average * (1.0f / getEventDeltaAverage()); }
+    
+    uint64_t getUsecsSinceLastEvent() const;
+
 private:
     int _numSamples;
     uint64_t _lastEventTimestamp;