Set ExternalVR timestamp (#928)

Author: MortimerGoro

app/src/main/cpp/BrowserWorld.cpp

@@ -1038,7 +1038,7 @@ BrowserWorld::DrawImmersive() {
 
   m.device->StartFrame();
   VRB_GL_CHECK(glDepthMask(GL_FALSE));
-  m.externalVR->PushFramePoses(m.device->GetHeadTransform(), m.controllers->GetControllers());
+  m.externalVR->PushFramePoses(m.device->GetHeadTransform(), m.controllers->GetControllers(), m.context->GetTimestamp());
   int32_t surfaceHandle = 0;
   device::EyeRect leftEye, rightEye;
   bool aDiscardFrame = !m.externalVR->WaitFrameResult();

app/src/main/cpp/ExternalVR.cpp

@@ -372,7 +372,7 @@ ExternalVR::GetVRState() const {
 }
 
 void
-ExternalVR::PushFramePoses(const vrb::Matrix& aHeadTransform, const std::vector<Controller>& aControllers) {
+ExternalVR::PushFramePoses(const vrb::Matrix& aHeadTransform, const std::vector<Controller>& aControllers, const double aTimestamp) {
   const vrb::Matrix inverseHeadTransform = aHeadTransform.Inverse();
   vrb::Quaternion quaternion(inverseHeadTransform);
   vrb::Vector translation = aHeadTransform.GetTranslation();
@@ -429,6 +429,8 @@ ExternalVR::PushFramePoses(const vrb::Matrix& aHeadTransform, const std::vector<
     }
   }
 
+  m.system.sensorState.timestamp = aTimestamp;
+
   PushSystemState();
 }
 

app/src/main/cpp/ExternalVR.h

@@ -51,7 +51,7 @@ class ExternalVR : public ImmersiveDisplay {
   void SetCompositorEnabled(bool aEnabled);
   bool IsPresenting() const;
   VRState GetVRState() const;
-  void PushFramePoses(const vrb::Matrix& aHeadTransform, const std::vector<Controller>& aControllers);
+  void PushFramePoses(const vrb::Matrix& aHeadTransform, const std::vector<Controller>& aControllers, const double aTimestamp);
   bool WaitFrameResult();
   void GetFrameResult(int32_t& aSurfaceHandle, device::EyeRect& aLeftEye, device::EyeRect& aRightEye) const;
   void StopPresenting();