Expose ASW activation status, provide normalized present rate information

libraries/display-plugins/src/display-plugins/OpenGLDisplayPlugin.cpp

@@ -654,6 +654,11 @@ float OpenGLDisplayPlugin::presentRate() const {
     return _presentRate.rate();
 }
 
+void OpenGLDisplayPlugin::resetPresentRate() {
+    // FIXME
+    // _presentRate = RateCounter<100>();
+}
+
 float OpenGLDisplayPlugin::renderRate() const { 
     return _renderRate.rate();
 }

libraries/display-plugins/src/display-plugins/OpenGLDisplayPlugin.h

@@ -59,6 +59,8 @@ public:
 
     float presentRate() const override;
 
+    void resetPresentRate() override;
+
     float newFramePresentRate() const override;
 
     float droppedFrameRate() const override;

libraries/plugins/src/plugins/DisplayPlugin.h

@@ -139,7 +139,7 @@ public:
     /// By default, all HMDs are stereo
     virtual bool isStereo() const { return isHmd(); }
     virtual bool isThrottled() const { return false; }
-    virtual float getTargetFrameRate() const { return 0.0f; }
+    virtual float getTargetFrameRate() const { return 1.0f; }
     virtual bool hasAsyncReprojection() const { return false; }
 
     /// Returns a boolean value indicating whether the display is currently visible 
@@ -189,6 +189,11 @@ public:
     virtual float renderRate() const { return -1.0f; }
     // Rate at which we present to the display device
     virtual float presentRate() const { return -1.0f; }
+    // Reset the present rate tracking (useful for if the target frame rate changes as in ASW for Oculus)
+    virtual void resetPresentRate() {}
+    // Return the present rate as fraction of the target present rate (hopefully 0.0 and 1.0)
+    virtual float normalizedPresentRate() const { return presentRate() / getTargetFrameRate(); }
+
     // Rate at which old frames are presented to the device display
     virtual float stutterRate() const { return -1.0f; }
     // Rate at which new frames are being presented to the display device

plugins/oculus/src/OculusDisplayPlugin.cpp

@@ -28,6 +28,12 @@ OculusDisplayPlugin::OculusDisplayPlugin() {
     _compositorDroppedFrames.store(0);
 }
 
+float OculusDisplayPlugin::getTargetFrameRate() const {
+    if (_aswActive) {
+        return _hmdDesc.DisplayRefreshRate / 2.0f;
+    }
+    return _hmdDesc.DisplayRefreshRate;
+}
 
 bool OculusDisplayPlugin::internalActivate() {
     bool result = Parent::internalActivate();
@@ -185,8 +191,6 @@ void OculusDisplayPlugin::hmdPresent() {
             }
         }
 
-
-
         if (!OVR_SUCCESS(result)) {
             logWarning("Failed to present");
         }
@@ -195,12 +199,20 @@ void OculusDisplayPlugin::hmdPresent() {
         static int appDroppedFrames = 0;
         ovrPerfStats perfStats;
         ovr_GetPerfStats(_session, &perfStats);
+        bool shouldResetPresentRate = false;
         for (int i = 0; i < perfStats.FrameStatsCount; ++i) {
             const auto& frameStats = perfStats.FrameStats[i];
             int delta = frameStats.CompositorDroppedFrameCount - compositorDroppedFrames;
             _stutterRate.increment(delta);
             compositorDroppedFrames = frameStats.CompositorDroppedFrameCount;
             appDroppedFrames = frameStats.AppDroppedFrameCount;
+            bool newAswState = ovrTrue == frameStats.AswIsActive;
+            if (_aswActive.exchange(newAswState) != newAswState) {
+                shouldResetPresentRate = true;
+            }
+        }
+        if (shouldResetPresentRate) {
+            resetPresentRate();
         }
         _appDroppedFrames.store(appDroppedFrames);
         _compositorDroppedFrames.store(compositorDroppedFrames);
@@ -212,6 +224,7 @@ void OculusDisplayPlugin::hmdPresent() {
 
 QJsonObject OculusDisplayPlugin::getHardwareStats() const {
     QJsonObject hardwareStats;
+    hardwareStats["asw_active"] = _aswActive.load();
     hardwareStats["app_dropped_frame_count"] = _appDroppedFrames.load();
     hardwareStats["compositor_dropped_frame_count"] = _compositorDroppedFrames.load();
     hardwareStats["long_render_count"] = _longRenders.load();

plugins/oculus/src/OculusDisplayPlugin.h

@@ -20,7 +20,8 @@ public:
 
     QString getPreferredAudioInDevice() const override;
     QString getPreferredAudioOutDevice() const override;
-    
+    float getTargetFrameRate() const override;
+
     virtual QJsonObject getHardwareStats() const;
 
 protected:
@@ -39,6 +40,7 @@ private:
     gpu::FramebufferPointer _outputFramebuffer;
     bool _customized { false };
 
+    std::atomic_bool _aswActive;
     std::atomic_int _compositorDroppedFrames;
     std::atomic_int _appDroppedFrames;
     std::atomic_int _longSubmits;

plugins/oculus/src/OculusHelpers.cpp

@@ -88,7 +88,11 @@ ovrSession acquireOculusSession() {
     }
 
     if (!session) {
-        if (!OVR_SUCCESS(ovr_Initialize(nullptr))) {
+    	ovrInitParams initParams {
+            ovrInit_RequestVersion | ovrInit_MixedRendering, OVR_MINOR_VERSION, nullptr, 0, 0
+        };
+
+        if (!OVR_SUCCESS(ovr_Initialize(&initParams))) {
             logWarning("Failed to initialize Oculus SDK");
             return session;
         }