Implement the content/renderer and content/browser part of the Device Motion API.

content/browser/device_orientation/data_fetcher_impl_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/device_orientation/data_fetcher_impl_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/logging.h"
 #include "content/browser/device_orientation/orientation.h"
+#include "content/common/device_motion_hardware_buffer.h"
 #include "jni/DeviceMotionAndOrientation_jni.h"
 
 using base::android::AttachCurrentThread;
 
 namespace content {
 
 namespace {
 
 // This should match ProviderImpl::kDesiredSamplingIntervalMs.
 // TODO(husky): Make that constant public so we can use it directly.
 const int kPeriodInMilliseconds = 100;
 
 }  // namespace
 
-DataFetcherImplAndroid::DataFetcherImplAndroid() {
+DataFetcherImplAndroid::DataFetcherImplAndroid()
+    : device_motion_buffer_(0),
+      is_buffer_ready_(false) {
   device_orientation_.Reset(
       Java_DeviceMotionAndOrientation_getInstance(AttachCurrentThread()));
 }
 
 void DataFetcherImplAndroid::Init(JNIEnv* env) {
   bool result = RegisterNativesImpl(env);
   DCHECK(result);
 }
 
 // TODO(timvolodine): Modify this method to be able to distinguish
@@ skipping 38 matching lines @@
   base::AutoLock autolock(next_orientation_lock_);
 
   Orientation* orientation = new Orientation();
   orientation->set_alpha(alpha);
   orientation->set_beta(beta);
   orientation->set_gamma(gamma);
   orientation->set_absolute(true);
   next_orientation_ = orientation;
 }
 
-void DataFetcherImplAndroid::GotAcceleration(
-    JNIEnv*, jobject, double x, double y, double z) {
-  NOTIMPLEMENTED();
-}
-
-void DataFetcherImplAndroid::GotAccelerationIncludingGravity(
-    JNIEnv*, jobject, double x, double y, double z) {
-  NOTIMPLEMENTED();
-}
-
-void DataFetcherImplAndroid::GotRotationRate(
-    JNIEnv*, jobject, double alpha, double beta, double gamma) {
-  NOTIMPLEMENTED();
-}
-
 bool DataFetcherImplAndroid::Start(
     DeviceData::Type event_type, int rate_in_milliseconds) {
   DCHECK(!device_orientation_.is_null());
   return Java_DeviceMotionAndOrientation_start(
       AttachCurrentThread(), device_orientation_.obj(),
       reinterpret_cast<jint>(this), static_cast<jint>(event_type),
       rate_in_milliseconds);
 }
 
 void DataFetcherImplAndroid::Stop(DeviceData::Type event_type) {
   DCHECK(!device_orientation_.is_null());
   Java_DeviceMotionAndOrientation_stop(
       AttachCurrentThread(), device_orientation_.obj(),
       static_cast<jint>(event_type));
 }
 
+// ----- New shared memory API methods
+
+void DataFetcherImplAndroid::GotAcceleration(
+    JNIEnv*, jobject, double x, double y, double z) {
+  device_motion_buffer_->sequence.WriteBegin();
+  device_motion_buffer_->buffer.accelerationX = x;
+  device_motion_buffer_->buffer.hasAccelerationX = true;
+  device_motion_buffer_->buffer.accelerationY = y;
+  device_motion_buffer_->buffer.hasAccelerationY = true;
+  device_motion_buffer_->buffer.accelerationZ = z;
+  device_motion_buffer_->buffer.hasAccelerationZ = true;
+  device_motion_buffer_->sequence.WriteEnd();
+  LOG(INFO) << "ACTIVE GotAcceleration" << x << "," << y << "," << z;
+
+  if (!is_buffer_ready_) {
+    receivedMotionData[0] = 1;
+    CheckBufferReadyToRead();
+  }
+}
+
+void DataFetcherImplAndroid::GotAccelerationIncludingGravity(
+    JNIEnv*, jobject, double x, double y, double z) {
+  device_motion_buffer_->sequence.WriteBegin();
+  device_motion_buffer_->buffer.accelerationIncludingGravityX = x;
+  device_motion_buffer_->buffer.hasAccelerationIncludingGravityX = true;
+  device_motion_buffer_->buffer.accelerationIncludingGravityY = y;
+  device_motion_buffer_->buffer.hasAccelerationIncludingGravityY = true;
+  device_motion_buffer_->buffer.accelerationIncludingGravityZ = z;
+  device_motion_buffer_->buffer.hasAccelerationIncludingGravityZ = true;
+  device_motion_buffer_->sequence.WriteEnd();
+
+  if (!is_buffer_ready_) {
+    receivedMotionData[1] = 1;
+    CheckBufferReadyToRead();
+  }
+}
+
+void DataFetcherImplAndroid::GotRotationRate(
+    JNIEnv*, jobject, double alpha, double beta, double gamma) {
+  device_motion_buffer_->sequence.WriteBegin();
+  device_motion_buffer_->buffer.rotationRateAlpha = alpha;
+  device_motion_buffer_->buffer.hasRotationRateAlpha = true;
+  device_motion_buffer_->buffer.rotationRateBeta = beta;
+  device_motion_buffer_->buffer.hasRotationRateBeta = true;
+  device_motion_buffer_->buffer.rotationRateGamma = gamma;
+  device_motion_buffer_->buffer.hasRotationRateGamma = true;
+  device_motion_buffer_->sequence.WriteEnd();
+
+  if (!is_buffer_ready_) {
+    receivedMotionData[2] = 1;
+    CheckBufferReadyToRead();
+  }
+}
+
+int DataFetcherImplAndroid::GetNumberActiveDeviceMotionSensors() {
+  DCHECK(!device_orientation_.is_null());
+  return Java_DeviceMotionAndOrientation_getNumberActiveDeviceMotionSensors(
+      AttachCurrentThread(), device_orientation_.obj());
+}
+
+bool DataFetcherImplAndroid::FetchDeviceMotionDataIntoBuffer() {
+  // This method should not be called because it is a push based fetcher.
+  DCHECK(needsPolling());
+  return false;
+}
+
+void DataFetcherImplAndroid::CheckBufferReadyToRead() {
+  if (receivedMotionData[0] + receivedMotionData[1] + receivedMotionData[2] ==
+          number_active_device_motion_sensors_) {
+      device_motion_buffer_->sequence.WriteBegin();
+      device_motion_buffer_->is_ready_for_read = true;
+      device_motion_buffer_->sequence.WriteEnd();
+      is_buffer_ready_ = true;
+      LOG(INFO)<<"ACTIVE BUFFER READY TO READ";
+  }
+}
+
+bool DataFetcherImplAndroid::StartFetchingDeviceMotionData(
+    DeviceMotionHardwareBuffer* buffer) {
+  device_motion_buffer_ = buffer;
+  receivedMotionData[0] = receivedMotionData[1] = receivedMotionData[2] = 0;
+  number_active_device_motion_sensors_ = 0;
+  is_buffer_ready_ = false;
+  bool success = Start(DeviceData::kTypeMotion, kPeriodInMilliseconds);
+
+  // If no motion data can ever be provided, the number of active device motion
+  // sensors will be zero. In that case flag the shared memory buffer
+  // as ready to read, as it will not change anyway.
+  number_active_device_motion_sensors_ = GetNumberActiveDeviceMotionSensors();
+  LOG(INFO)<< "ACTIVE SENSORS :"<<number_active_device_motion_sensors_;
+  CheckBufferReadyToRead();
+  return success;
+}
+
+void DataFetcherImplAndroid::StopFetchingDeviceMotionData() {
+  Stop(DeviceData::kTypeMotion);
+  number_active_device_motion_sensors_ = 0;
+  receivedMotionData[0] = receivedMotionData[1] = receivedMotionData[2] = 0;
+  is_buffer_ready_ = false;
+}
+
 }  // namespace content