Add support for haptic feedback on Pico controllers

app/CMakeLists.txt

@@ -67,6 +67,7 @@ target_sources(
         PUBLIC
         src/picovr/cpp/native-lib.cpp
         src/picovr/cpp/DeviceDelegatePicoVR.cpp
+        src/picovr/cpp/VRBrowserPico.cpp
 )
 elseif(NOAPI)
 target_sources(

app/src/picovr/cpp/DeviceDelegatePicoVR.cpp

@@ -5,7 +5,7 @@
 
 #include "DeviceDelegatePicoVR.h"
 #include "ElbowModel.h"
-#include "BrowserEGLContext.h"
+#include "VRBrowserPico.h"
 
 #include <EGL/egl.h>
 #include "vrb/CameraEye.h"
@@ -53,6 +53,7 @@ struct DeviceDelegatePicoVR::State {
     float axisX = 0;
     float axisY = 0;
     ElbowModel::HandEnum hand;
+    int hapticFrameID = 0;
     Controller()
         : index(-1)
         , created(false)
@@ -142,6 +143,16 @@ struct DeviceDelegatePicoVR::State {
     }
   }
 
+  void UpdateHaptics(Controller& aController) {
+    uint64_t inputFrameID = 0;
+    float pulseDuration = 0.0f, pulseIntensity = 0.0f;
+    controllerDelegate->GetHapticFeedback(aController.index, inputFrameID, pulseDuration, pulseIntensity);
+
+    if (aController.hapticFrameID != inputFrameID) {
+      VRBrowserPico::UpdateHaptics(aController.index, pulseIntensity, pulseDuration);
+    }
+  }
+
   void UpdateControllers() {
     for (int32_t i = 0; i < controllers.size(); ++i) {
       if (!controllers[i].enabled) {
@@ -208,6 +219,10 @@ struct DeviceDelegatePicoVR::State {
       }
 
       controllerDelegate->SetTransform(i, transform);
+
+      if (controllerDelegate->GetHapticCount(i)) {
+        UpdateHaptics(controllers[i]);
+      }
     }
   }
 };
@@ -227,6 +242,10 @@ DeviceDelegatePicoVR::SetRenderMode(const device::RenderMode aMode) {
     return;
   }
   m.renderMode = aMode;
+  if (aMode == device::RenderMode::StandAlone) {
+    // Ensure that all haptics are cancelled when exiting WebVR
+    VRBrowserPico::CancelAllHaptics();
+  }
 }
 
 device::RenderMode
@@ -296,7 +315,7 @@ DeviceDelegatePicoVR::SetControllerDelegate(ControllerDelegatePtr& aController)
       beam.TranslateInPlace(vrb::Vector(0.0f, 0.012f, -0.06f));
       m.controllerDelegate->CreateController(index, int32_t(controller.hand), controller.IsRightHand() ? "Pico Neo 2 (Right)" : "Pico Neo 2 (LEFT)", beam);
       m.controllerDelegate->SetButtonCount(index, kNumButtons);
-      m.controllerDelegate->SetHapticCount(index, 0);
+      m.controllerDelegate->SetHapticCount(index, 1);
     } else {
       vrb::Matrix beam =  vrb::Matrix::Rotation(vrb::Vector(1.0f, 0.0f, 0.0f), -vrb::PI_FLOAT / 11.5f);
 

app/src/picovr/cpp/VRBrowserPico.cpp

@@ -0,0 +1,76 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "VRBrowserPico.h"
+#include "vrb/ConcreteClass.h"
+#include "vrb/Logger.h"
+#include "JNIUtil.h"
+
+namespace {
+
+const char* sUpdateHapticsName = "updateHaptics";
+const char* sUpdateHapticsSignature = "(IFF)V";
+const char* sCancelAllHapticsName = "cancelAllHaptics";
+const char* sCancelAllHapticsSignature = "()V";
+
+JNIEnv* sEnv = nullptr;
+jclass sBrowserClass = nullptr;
+jobject sActivity = nullptr;
+jmethodID sUpdateHaptics = nullptr;
+jmethodID sCancelAllHaptics = nullptr;
+}
+
+namespace crow {
+
+void
+VRBrowserPico::InitializeJava(JNIEnv* aEnv, jobject aActivity) {
+  if (aEnv == sEnv) {
+    return;
+  }
+  sEnv = aEnv;
+  if (!sEnv) {
+    return;
+  }
+  sActivity = sEnv->NewGlobalRef(aActivity);
+  sBrowserClass = sEnv->GetObjectClass(sActivity);
+  if (!sBrowserClass) {
+    return;
+  }
+
+  sUpdateHaptics = FindJNIMethodID(sEnv, sBrowserClass, sUpdateHapticsName, sUpdateHapticsSignature);
+  sCancelAllHaptics = FindJNIMethodID(sEnv, sBrowserClass, sCancelAllHapticsName, sCancelAllHapticsSignature);
+}
+
+void
+VRBrowserPico::ShutdownJava() {
+  if (!sEnv) {
+    return;
+  }
+  if (sActivity) {
+    sEnv->DeleteGlobalRef(sActivity);
+    sActivity = nullptr;
+  }
+
+  sBrowserClass = nullptr;
+  sUpdateHaptics = nullptr;
+  sCancelAllHaptics = nullptr;
+  sEnv = nullptr;
+}
+
+
+void
+VRBrowserPico::UpdateHaptics(jint aControllerIndex, jfloat aIntensity, jfloat aDuration) {
+  if (!ValidateMethodID(sEnv, sActivity, sUpdateHaptics, __FUNCTION__)) { return; }
+  sEnv->CallVoidMethod(sActivity, sUpdateHaptics, aControllerIndex, aIntensity, aDuration);
+  CheckJNIException(sEnv, __FUNCTION__);
+}
+void
+VRBrowserPico::CancelAllHaptics() {
+  if (!ValidateMethodID(sEnv, sActivity, sCancelAllHaptics, __FUNCTION__)) { return; }
+  sEnv->CallVoidMethod(sActivity, sCancelAllHaptics);
+  CheckJNIException(sEnv, __FUNCTION__);
+}
+
+} // namespace crow

app/src/picovr/cpp/VRBrowserPico.h

@@ -0,0 +1,23 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#pragma once
+#include "vrb/MacroUtils.h"
+
+#include <memory>
+#include <string>
+#include <jni.h>
+#include <functional>
+
+namespace crow {
+
+namespace VRBrowserPico {
+void InitializeJava(JNIEnv* aEnv, jobject aActivity);
+void ShutdownJava();
+void UpdateHaptics(jint aControllerIndex, jfloat aIntensity, jfloat aDuration);
+void CancelAllHaptics();
+} // namespace VRBrowser;
+
+} // namespace crow

app/src/picovr/cpp/native-lib.cpp

@@ -8,6 +8,7 @@
 
 #include "BrowserWorld.h"
 #include "DeviceDelegatePicoVR.h"
+#include "VRBrowserPico.h"
 #include "vrb/GLError.h"
 #include "vrb/Logger.h"
 #include "vrb/RunnableQueue.h"
@@ -36,6 +37,7 @@ JNI_METHOD(void, nativeInitialize)
 (JNIEnv* aEnv, jobject aActivity, jint width, jint height, jobject aAssetManager, jint type, jint focusInex) {
   gDestroyed = false;
   sQueue->AttachToThread();
+  VRBrowserPico::InitializeJava(aEnv, aActivity);
   if (!sDevice) {
     sDevice = crow::DeviceDelegatePicoVR::Create(BrowserWorld::Instance().GetRenderContext());
   }
@@ -61,6 +63,7 @@ JNI_METHOD(void, nativeDestroy)
   BrowserWorld::Instance().RegisterDeviceDelegate(nullptr);
   sDevice = nullptr;
   BrowserWorld::Destroy();
+  VRBrowserPico::ShutdownJava();
 }
 
 JNI_METHOD(void, nativePause)

app/src/picovr/java/org/mozilla/vrbrowser/PlatformActivity.java

@@ -9,6 +9,7 @@
 import android.os.Bundle;
 import android.util.Log;
 
+import androidx.annotation.Keep;
 import androidx.annotation.NonNull;
 
 import com.picovr.client.HbListener;
@@ -97,6 +98,7 @@ public void onBindService() {
     @Override
     protected void onPause() {
         if (mControllerManager != null) {
+            cancelAllHaptics();
             mControllerManager.unbindService();
         } else if (mHbManager != null) {
             mHbManager.Pause();
@@ -315,6 +317,31 @@ public void onChannelChanged(int i, int i1) {
 
     }
 
+    // Called by native
+    @Keep
+    @SuppressWarnings("unused")
+    private void updateHaptics(int aControllerIndex, float aIntensity, float aDurationSeconds) {
+        runOnUiThread(() -> {
+            if (mControllerManager != null) {
+                float intensity = 255.0f * Math.max(Math.min(aIntensity, 1.0f), 0.0f);
+                int durationMs = Math.round(aDurationSeconds * 1000);
+                ControllerClient.vibrateCV2ControllerStrength(intensity, durationMs, 1 - aControllerIndex);
+            }
+        });
+    }
+
+    // Called by native
+    @Keep
+    @SuppressWarnings("unused")
+    private void cancelAllHaptics() {
+        runOnUiThread(() -> {
+            if (mControllerManager != null) {
+                ControllerClient.vibrateCV2ControllerStrength(0, 0, 0);
+                ControllerClient.vibrateCV2ControllerStrength(0, 0, 1);
+            }
+        });
+    }
+
     protected native void nativeOnCreate();
     protected native void nativeInitialize(int width, int height, Object aAssetManager, int type, int focusIndex);
     protected native void nativeShutdown();