Try fixing lag state on recentering on Linux

Author: zmerp

alvr/server/cpp/alvr_server/ChaperoneUpdater.cpp

@@ -13,29 +13,29 @@ using namespace alvr_chaperone;
 
 std::mutex chaperone_mutex;
 
-void InitChaperoneClient() {
+void InitOpenvrClient() {
 #ifndef __APPLE__
     std::unique_lock<std::mutex> lock(chaperone_mutex);
 
     vr::EVRInitError error;
     vr::VR_Init(&error, vr::VRApplication_Utility);
 
     if (error != vr::VRInitError_None) {
-        Warn("Failed to init OpenVR client to update Chaperone boundary! Error: %d", error);
+        Warn("Failed to init OpenVR client! Error: %d", error);
         return;
     }
 #endif
 }
 
-void ShutdownChaperoneClient() {
+void ShutdownOpenvrClient() {
 #ifndef __APPLE__
     std::unique_lock<std::mutex> lock(chaperone_mutex);
 
     vr::VR_Shutdown();
 #endif
 }
 
-void SetChaperoneArea(float areaWidth, float areaHeight) {
+void _SetChaperoneArea(float areaWidth, float areaHeight) {
 #ifndef __APPLE__
     std::unique_lock<std::mutex> lock(chaperone_mutex);
 
@@ -69,16 +69,6 @@ void SetChaperoneArea(float areaWidth, float areaHeight) {
 
 #ifdef __linux__
 vr::HmdMatrix34_t GetRawZeroPose() {
-    vr::HmdMatrix34_t out = {};
-    std::unique_lock<std::mutex> lock(chaperone_mutex);
-    vr::EVRInitError error;
-    vr::VR_Init(&error, vr::VRApplication_Utility);
-    if (error != vr::VRInitError_None) {
-        Warn("Failed to init OpenVR client to get raw zero pose! Error: %d", error);
-        return out;
-    }
-    out = vr::VRSystem()->GetRawZeroPoseToStandingAbsoluteTrackingPose();
-    vr::VR_Shutdown();
-    return out;
+    return vr::VRSystem()->GetRawZeroPoseToStandingAbsoluteTrackingPose();
 }
 #endif

alvr/server/cpp/alvr_server/alvr_server.cpp

@@ -22,6 +22,7 @@
 #include <map>
 #include <optional>
 
+void _SetChaperoneArea(float areaWidth, float areaHeight);
 #ifdef __linux__
 vr::HmdMatrix34_t GetRawZeroPose();
 #endif
@@ -140,8 +141,10 @@ class DriverProvider : public vr::IServerTrackedDeviceProvider {
 #ifdef __linux__
             else if (event.eventType == vr::VREvent_ChaperoneUniverseHasChanged) {
                 if (hmd && hmd->m_poseHistory) {
+                    InitOpenvrClient();
                     hmd->m_poseHistory->SetTransformUpdating();
                     hmd->m_poseHistory->SetTransform(GetRawZeroPose());
+                    ShutdownOpenvrClient();
                 }
             }
 #endif
@@ -320,6 +323,19 @@ void SetButton(unsigned long long buttonID, FfiButtonValue value) {
     }
 }
 
+void SetChaperoneArea(float areaWidth, float areaHeight) {
+    _SetChaperoneArea(areaWidth, areaHeight);
+
+#ifdef __linux__
+    auto pose = vr::VRSystem()->GetRawZeroPoseToStandingAbsoluteTrackingPose();
+    if (g_driver_provider.hmd && g_driver_provider.hmd->m_poseHistory) {
+        g_driver_provider.hmd->m_poseHistory->SetTransformUpdating();
+        g_driver_provider.hmd->m_poseHistory->SetTransform(pose);
+    }
+#endif
+
+}
+
 void CaptureFrame() {
 #ifndef __APPLE__
     if (g_driver_provider.hmd && g_driver_provider.hmd->m_encoder) {

alvr/server/cpp/alvr_server/bindings.h

@@ -146,8 +146,8 @@ extern "C" void SetViewsConfig(FfiViewsConfig config);
 extern "C" void SetBattery(unsigned long long deviceID, float gauge_value, bool is_plugged);
 extern "C" void SetButton(unsigned long long buttonID, FfiButtonValue value);
 
-extern "C" void InitChaperoneClient();
-extern "C" void ShutdownChaperoneClient();
+extern "C" void InitOpenvrClient();
+extern "C" void ShutdownOpenvrClient();
 extern "C" void SetChaperoneArea(float areaWidth, float areaHeight);
 
 extern "C" void CaptureFrame();

alvr/server/src/connection.rs

@@ -925,7 +925,7 @@ fn try_connect(mut client_ips: HashMap<IpAddr, String>) -> ConResult {
         let control_sender = Arc::clone(&control_sender);
         let client_hostname = client_hostname.clone();
         move || {
-            unsafe { crate::InitChaperoneClient() };
+            unsafe { crate::InitOpenvrClient() };
 
             let mut disconnection_deadline = Instant::now() + KEEPALIVE_TIMEOUT;
             while IS_STREAMING.value() {
@@ -1061,7 +1061,7 @@ fn try_connect(mut client_ips: HashMap<IpAddr, String>) -> ConResult {
 
                 disconnection_deadline = Instant::now() + KEEPALIVE_TIMEOUT;
             }
-            unsafe { crate::ShutdownChaperoneClient() };
+            unsafe { crate::ShutdownOpenvrClient() };
 
             SERVER_DATA_MANAGER.write().update_client_list(
                 client_hostname,

alvr/server/src/lib.rs

@@ -359,9 +359,9 @@ pub unsafe extern "C" fn HmdDriverFactory(
                 // call this when inside a new thread. Calling this on the parent thread will crash
                 // SteamVR
                 unsafe {
-                    InitChaperoneClient();
+                    InitOpenvrClient();
                     SetChaperoneArea(2.0, 2.0);
-                    ShutdownChaperoneClient();
+                    ShutdownOpenvrClient();
                 }
             }