| /* |
| * Copyright 2008, The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "SensorManager" |
| |
| #include <map> |
| |
| #include <ScopedUtfChars.h> |
| #include <ScopedLocalRef.h> |
| |
| #include <utils/Log.h> |
| #include <utils/Looper.h> |
| |
| #include <gui/Sensor.h> |
| #include <gui/SensorManager.h> |
| #include <gui/SensorEventQueue.h> |
| |
| #include "jni.h" |
| #include "JNIHelp.h" |
| #include "android_os_MessageQueue.h" |
| #include <android_runtime/AndroidRuntime.h> |
| |
| #include "core_jni_helpers.h" |
| |
| static struct { |
| jclass clazz; |
| jmethodID dispatchSensorEvent; |
| jmethodID dispatchFlushCompleteEvent; |
| } gBaseEventQueueClassInfo; |
| |
| namespace android { |
| |
| struct SensorOffsets |
| { |
| jfieldID name; |
| jfieldID vendor; |
| jfieldID version; |
| jfieldID handle; |
| jfieldID range; |
| jfieldID resolution; |
| jfieldID power; |
| jfieldID minDelay; |
| jfieldID fifoReservedEventCount; |
| jfieldID fifoMaxEventCount; |
| jfieldID stringType; |
| jfieldID requiredPermission; |
| jfieldID maxDelay; |
| jfieldID flags; |
| jmethodID setType; |
| } gSensorOffsets; |
| |
| |
| /* |
| * The method below are not thread-safe and not intended to be |
| */ |
| |
| static void |
| nativeClassInit (JNIEnv *_env, jclass _this) |
| { |
| jclass sensorClass = _env->FindClass("android/hardware/Sensor"); |
| SensorOffsets& sensorOffsets = gSensorOffsets; |
| sensorOffsets.name = _env->GetFieldID(sensorClass, "mName", "Ljava/lang/String;"); |
| sensorOffsets.vendor = _env->GetFieldID(sensorClass, "mVendor", "Ljava/lang/String;"); |
| sensorOffsets.version = _env->GetFieldID(sensorClass, "mVersion", "I"); |
| sensorOffsets.handle = _env->GetFieldID(sensorClass, "mHandle", "I"); |
| sensorOffsets.range = _env->GetFieldID(sensorClass, "mMaxRange", "F"); |
| sensorOffsets.resolution = _env->GetFieldID(sensorClass, "mResolution","F"); |
| sensorOffsets.power = _env->GetFieldID(sensorClass, "mPower", "F"); |
| sensorOffsets.minDelay = _env->GetFieldID(sensorClass, "mMinDelay", "I"); |
| sensorOffsets.fifoReservedEventCount = |
| _env->GetFieldID(sensorClass, "mFifoReservedEventCount", "I"); |
| sensorOffsets.fifoMaxEventCount = _env->GetFieldID(sensorClass, "mFifoMaxEventCount", "I"); |
| sensorOffsets.stringType = _env->GetFieldID(sensorClass, "mStringType", "Ljava/lang/String;"); |
| sensorOffsets.requiredPermission = _env->GetFieldID(sensorClass, "mRequiredPermission", |
| "Ljava/lang/String;"); |
| sensorOffsets.maxDelay = _env->GetFieldID(sensorClass, "mMaxDelay", "I"); |
| sensorOffsets.flags = _env->GetFieldID(sensorClass, "mFlags", "I"); |
| sensorOffsets.setType = _env->GetMethodID(sensorClass, "setType", "(I)Z"); |
| } |
| |
| /** |
| * A key comparator predicate. |
| * It is used to intern strings associated with Sensor data. |
| * It defines a 'Strict weak ordering' for the interned strings. |
| */ |
| class InternedStringCompare { |
| public: |
| bool operator()(const String8* string1, const String8* string2) const { |
| if (string1 == NULL) { |
| return string2 != NULL; |
| } |
| if (string2 == NULL) { |
| return false; |
| } |
| return string1->compare(*string2) < 0; |
| } |
| }; |
| |
| /** |
| * A localized interning mechanism for Sensor strings. |
| * We implement our own interning to avoid the overhead of using java.lang.String#intern(). |
| * It is common that Vendor, StringType, and RequirePermission data is common between many of the |
| * Sensors, by interning the memory usage to represent Sensors is optimized. |
| */ |
| static jstring |
| getInternedString(JNIEnv *env, const String8* string) { |
| static std::map<const String8*, jstring, InternedStringCompare> internedStrings; |
| |
| jstring internedString; |
| std::map<const String8*, jstring>::iterator iterator = internedStrings.find(string); |
| if (iterator != internedStrings.end()) { |
| internedString = iterator->second; |
| } else { |
| jstring localString = env->NewStringUTF(string->string()); |
| // we are implementing our own interning so expect these strings to be backed by global refs |
| internedString = (jstring) env->NewGlobalRef(localString); |
| internedStrings.insert(std::make_pair(string, internedString)); |
| env->DeleteLocalRef(localString); |
| } |
| return internedString; |
| } |
| |
| static jlong |
| nativeCreate |
| (JNIEnv *env, jclass clazz, jstring opPackageName) |
| { |
| ScopedUtfChars opPackageNameUtf(env, opPackageName); |
| return (jlong) new SensorManager(String16(opPackageNameUtf.c_str())); |
| } |
| |
| static jboolean |
| nativeGetSensorAtIndex(JNIEnv *env, jclass clazz, jlong sensorManager, jobject sensor, jint index) |
| { |
| SensorManager* mgr = reinterpret_cast<SensorManager*>(sensorManager); |
| |
| Sensor const* const* sensorList; |
| size_t count = mgr->getSensorList(&sensorList); |
| if (size_t(index) >= count) { |
| return false; |
| } |
| |
| Sensor const* const list = sensorList[index]; |
| const SensorOffsets& sensorOffsets(gSensorOffsets); |
| jstring name = getInternedString(env, &list->getName()); |
| jstring vendor = getInternedString(env, &list->getVendor()); |
| jstring requiredPermission = getInternedString(env, &list->getRequiredPermission()); |
| env->SetObjectField(sensor, sensorOffsets.name, name); |
| env->SetObjectField(sensor, sensorOffsets.vendor, vendor); |
| env->SetIntField(sensor, sensorOffsets.version, list->getVersion()); |
| env->SetIntField(sensor, sensorOffsets.handle, list->getHandle()); |
| env->SetFloatField(sensor, sensorOffsets.range, list->getMaxValue()); |
| env->SetFloatField(sensor, sensorOffsets.resolution, list->getResolution()); |
| env->SetFloatField(sensor, sensorOffsets.power, list->getPowerUsage()); |
| env->SetIntField(sensor, sensorOffsets.minDelay, list->getMinDelay()); |
| env->SetIntField(sensor, sensorOffsets.fifoReservedEventCount, |
| list->getFifoReservedEventCount()); |
| env->SetIntField(sensor, sensorOffsets.fifoMaxEventCount, |
| list->getFifoMaxEventCount()); |
| env->SetObjectField(sensor, sensorOffsets.requiredPermission, |
| requiredPermission); |
| env->SetIntField(sensor, sensorOffsets.maxDelay, list->getMaxDelay()); |
| env->SetIntField(sensor, sensorOffsets.flags, list->getFlags()); |
| if (env->CallBooleanMethod(sensor, sensorOffsets.setType, list->getType()) == JNI_FALSE) { |
| jstring stringType = getInternedString(env, &list->getStringType()); |
| env->SetObjectField(sensor, sensorOffsets.stringType, stringType); |
| } |
| return true; |
| } |
| |
| static jboolean nativeIsDataInjectionEnabled(JNIEnv *_env, jclass _this, jlong sensorManager) { |
| SensorManager* mgr = reinterpret_cast<SensorManager*>(sensorManager); |
| return mgr->isDataInjectionEnabled(); |
| } |
| |
| //---------------------------------------------------------------------------- |
| |
| class Receiver : public LooperCallback { |
| sp<SensorEventQueue> mSensorQueue; |
| sp<MessageQueue> mMessageQueue; |
| jobject mReceiverWeakGlobal; |
| jfloatArray mScratch; |
| public: |
| Receiver(const sp<SensorEventQueue>& sensorQueue, |
| const sp<MessageQueue>& messageQueue, |
| jobject receiverWeak, jfloatArray scratch) { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| mSensorQueue = sensorQueue; |
| mMessageQueue = messageQueue; |
| mReceiverWeakGlobal = env->NewGlobalRef(receiverWeak); |
| mScratch = (jfloatArray)env->NewGlobalRef(scratch); |
| } |
| ~Receiver() { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| env->DeleteGlobalRef(mReceiverWeakGlobal); |
| env->DeleteGlobalRef(mScratch); |
| } |
| sp<SensorEventQueue> getSensorEventQueue() const { |
| return mSensorQueue; |
| } |
| |
| void destroy() { |
| mMessageQueue->getLooper()->removeFd( mSensorQueue->getFd() ); |
| } |
| |
| private: |
| virtual void onFirstRef() { |
| LooperCallback::onFirstRef(); |
| mMessageQueue->getLooper()->addFd(mSensorQueue->getFd(), 0, |
| ALOOPER_EVENT_INPUT, this, mSensorQueue.get()); |
| } |
| |
| virtual int handleEvent(int fd, int events, void* data) { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| sp<SensorEventQueue> q = reinterpret_cast<SensorEventQueue *>(data); |
| ScopedLocalRef<jobject> receiverObj(env, jniGetReferent(env, mReceiverWeakGlobal)); |
| |
| ssize_t n; |
| ASensorEvent buffer[16]; |
| while ((n = q->read(buffer, 16)) > 0) { |
| for (int i=0 ; i<n ; i++) { |
| if (buffer[i].type == SENSOR_TYPE_STEP_COUNTER) { |
| // step-counter returns a uint64, but the java API only deals with floats |
| float value = float(buffer[i].u64.step_counter); |
| env->SetFloatArrayRegion(mScratch, 0, 1, &value); |
| } else { |
| env->SetFloatArrayRegion(mScratch, 0, 16, buffer[i].data); |
| } |
| |
| if (buffer[i].type == SENSOR_TYPE_META_DATA) { |
| // This is a flush complete sensor event. Call dispatchFlushCompleteEvent |
| // method. |
| if (receiverObj.get()) { |
| env->CallVoidMethod(receiverObj.get(), |
| gBaseEventQueueClassInfo.dispatchFlushCompleteEvent, |
| buffer[i].meta_data.sensor); |
| } |
| } else { |
| int8_t status; |
| switch (buffer[i].type) { |
| case SENSOR_TYPE_ORIENTATION: |
| case SENSOR_TYPE_MAGNETIC_FIELD: |
| case SENSOR_TYPE_ACCELEROMETER: |
| case SENSOR_TYPE_GYROSCOPE: |
| case SENSOR_TYPE_GRAVITY: |
| case SENSOR_TYPE_LINEAR_ACCELERATION: |
| status = buffer[i].vector.status; |
| break; |
| case SENSOR_TYPE_HEART_RATE: |
| status = buffer[i].heart_rate.status; |
| break; |
| default: |
| status = SENSOR_STATUS_ACCURACY_HIGH; |
| break; |
| } |
| if (receiverObj.get()) { |
| env->CallVoidMethod(receiverObj.get(), |
| gBaseEventQueueClassInfo.dispatchSensorEvent, |
| buffer[i].sensor, |
| mScratch, |
| status, |
| buffer[i].timestamp); |
| } |
| } |
| if (env->ExceptionCheck()) { |
| mSensorQueue->sendAck(buffer, n); |
| ALOGE("Exception dispatching input event."); |
| return 1; |
| } |
| } |
| mSensorQueue->sendAck(buffer, n); |
| } |
| if (n<0 && n != -EAGAIN) { |
| // FIXME: error receiving events, what to do in this case? |
| } |
| return 1; |
| } |
| }; |
| |
| static jlong nativeInitSensorEventQueue(JNIEnv *env, jclass clazz, jlong sensorManager, |
| jobject eventQWeak, jobject msgQ, jfloatArray scratch, jstring packageName, jint mode) { |
| SensorManager* mgr = reinterpret_cast<SensorManager*>(sensorManager); |
| ScopedUtfChars packageUtf(env, packageName); |
| String8 clientName(packageUtf.c_str()); |
| sp<SensorEventQueue> queue(mgr->createEventQueue(clientName, mode)); |
| |
| sp<MessageQueue> messageQueue = android_os_MessageQueue_getMessageQueue(env, msgQ); |
| if (messageQueue == NULL) { |
| jniThrowRuntimeException(env, "MessageQueue is not initialized."); |
| return 0; |
| } |
| |
| sp<Receiver> receiver = new Receiver(queue, messageQueue, eventQWeak, scratch); |
| receiver->incStrong((void*)nativeInitSensorEventQueue); |
| return jlong(receiver.get()); |
| } |
| |
| static jint nativeEnableSensor(JNIEnv *env, jclass clazz, jlong eventQ, jint handle, jint rate_us, |
| jint maxBatchReportLatency) { |
| sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ)); |
| return receiver->getSensorEventQueue()->enableSensor(handle, rate_us, maxBatchReportLatency, |
| 0); |
| } |
| |
| static jint nativeDisableSensor(JNIEnv *env, jclass clazz, jlong eventQ, jint handle) { |
| sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ)); |
| return receiver->getSensorEventQueue()->disableSensor(handle); |
| } |
| |
| static void nativeDestroySensorEventQueue(JNIEnv *env, jclass clazz, jlong eventQ) { |
| sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ)); |
| receiver->destroy(); |
| receiver->decStrong((void*)nativeInitSensorEventQueue); |
| } |
| |
| static jint nativeFlushSensor(JNIEnv *env, jclass clazz, jlong eventQ) { |
| sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ)); |
| return receiver->getSensorEventQueue()->flush(); |
| } |
| |
| static jint nativeInjectSensorData(JNIEnv *env, jclass clazz, jlong eventQ, jint handle, |
| jfloatArray values, jint accuracy, jlong timestamp) { |
| sp<Receiver> receiver(reinterpret_cast<Receiver *>(eventQ)); |
| // Create a sensor_event from the above data which can be injected into the HAL. |
| ASensorEvent sensor_event; |
| memset(&sensor_event, 0, sizeof(sensor_event)); |
| sensor_event.sensor = handle; |
| sensor_event.timestamp = timestamp; |
| env->GetFloatArrayRegion(values, 0, env->GetArrayLength(values), sensor_event.data); |
| return receiver->getSensorEventQueue()->injectSensorEvent(sensor_event); |
| } |
| //---------------------------------------------------------------------------- |
| |
| static JNINativeMethod gSystemSensorManagerMethods[] = { |
| {"nativeClassInit", |
| "()V", |
| (void*)nativeClassInit }, |
| {"nativeCreate", |
| "(Ljava/lang/String;)J", |
| (void*)nativeCreate }, |
| |
| {"nativeGetSensorAtIndex", |
| "(JLandroid/hardware/Sensor;I)Z", |
| (void*)nativeGetSensorAtIndex }, |
| |
| {"nativeIsDataInjectionEnabled", |
| "(J)Z", |
| (void*)nativeIsDataInjectionEnabled}, |
| }; |
| |
| static JNINativeMethod gBaseEventQueueMethods[] = { |
| {"nativeInitBaseEventQueue", |
| "(JLjava/lang/ref/WeakReference;Landroid/os/MessageQueue;[FLjava/lang/String;ILjava/lang/String;)J", |
| (void*)nativeInitSensorEventQueue }, |
| |
| {"nativeEnableSensor", |
| "(JIII)I", |
| (void*)nativeEnableSensor }, |
| |
| {"nativeDisableSensor", |
| "(JI)I", |
| (void*)nativeDisableSensor }, |
| |
| {"nativeDestroySensorEventQueue", |
| "(J)V", |
| (void*)nativeDestroySensorEventQueue }, |
| |
| {"nativeFlushSensor", |
| "(J)I", |
| (void*)nativeFlushSensor }, |
| |
| {"nativeInjectSensorData", |
| "(JI[FIJ)I", |
| (void*)nativeInjectSensorData }, |
| }; |
| |
| }; // namespace android |
| |
| using namespace android; |
| |
| int register_android_hardware_SensorManager(JNIEnv *env) |
| { |
| RegisterMethodsOrDie(env, "android/hardware/SystemSensorManager", |
| gSystemSensorManagerMethods, NELEM(gSystemSensorManagerMethods)); |
| |
| RegisterMethodsOrDie(env, "android/hardware/SystemSensorManager$BaseEventQueue", |
| gBaseEventQueueMethods, NELEM(gBaseEventQueueMethods)); |
| |
| gBaseEventQueueClassInfo.clazz = FindClassOrDie(env, |
| "android/hardware/SystemSensorManager$BaseEventQueue"); |
| |
| gBaseEventQueueClassInfo.dispatchSensorEvent = GetMethodIDOrDie(env, |
| gBaseEventQueueClassInfo.clazz, "dispatchSensorEvent", "(I[FIJ)V"); |
| |
| gBaseEventQueueClassInfo.dispatchFlushCompleteEvent = GetMethodIDOrDie(env, |
| gBaseEventQueueClassInfo.clazz, "dispatchFlushCompleteEvent", "(I)V"); |
| |
| return 0; |
| } |
