| /* |
| * Copyright (C) 2011 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 "DisplayEventReceiver" |
| |
| //#define LOG_NDEBUG 0 |
| |
| #include "JNIHelp.h" |
| |
| #include <inttypes.h> |
| |
| #include <android_runtime/AndroidRuntime.h> |
| #include <androidfw/DisplayEventDispatcher.h> |
| #include <utils/Log.h> |
| #include <utils/Looper.h> |
| #include <utils/threads.h> |
| #include <gui/DisplayEventReceiver.h> |
| #include "android_os_MessageQueue.h" |
| |
| #include <ScopedLocalRef.h> |
| |
| #include "core_jni_helpers.h" |
| |
| namespace android { |
| |
| // Number of events to read at a time from the DisplayEventReceiver pipe. |
| // The value should be large enough that we can quickly drain the pipe |
| // using just a few large reads. |
| static const size_t EVENT_BUFFER_SIZE = 100; |
| |
| static struct { |
| jclass clazz; |
| |
| jmethodID dispatchVsync; |
| jmethodID dispatchHotplug; |
| } gDisplayEventReceiverClassInfo; |
| |
| |
| class NativeDisplayEventReceiver : public DisplayEventDispatcher { |
| public: |
| NativeDisplayEventReceiver(JNIEnv* env, |
| jobject receiverWeak, const sp<MessageQueue>& messageQueue); |
| |
| void dispose(); |
| |
| protected: |
| virtual ~NativeDisplayEventReceiver(); |
| |
| private: |
| jobject mReceiverWeakGlobal; |
| sp<MessageQueue> mMessageQueue; |
| DisplayEventReceiver mReceiver; |
| bool mWaitingForVsync; |
| |
| virtual void dispatchVsync(nsecs_t timestamp, int32_t id, uint32_t count); |
| virtual void dispatchHotplug(nsecs_t timestamp, int32_t id, bool connected); |
| }; |
| |
| |
| NativeDisplayEventReceiver::NativeDisplayEventReceiver(JNIEnv* env, |
| jobject receiverWeak, const sp<MessageQueue>& messageQueue) : |
| DisplayEventDispatcher(messageQueue->getLooper()), |
| mReceiverWeakGlobal(env->NewGlobalRef(receiverWeak)), |
| mMessageQueue(messageQueue), mWaitingForVsync(false) { |
| ALOGV("receiver %p ~ Initializing display event receiver.", this); |
| } |
| |
| NativeDisplayEventReceiver::~NativeDisplayEventReceiver() { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| env->DeleteGlobalRef(mReceiverWeakGlobal); |
| ALOGV("receiver %p ~ dtor display event receiver.", this); |
| } |
| |
| void NativeDisplayEventReceiver::dispose() { |
| ALOGV("receiver %p ~ Disposing display event receiver.", this); |
| DisplayEventDispatcher::dispose(); |
| } |
| |
| void NativeDisplayEventReceiver::dispatchVsync(nsecs_t timestamp, int32_t id, uint32_t count) { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| |
| ScopedLocalRef<jobject> receiverObj(env, jniGetReferent(env, mReceiverWeakGlobal)); |
| if (receiverObj.get()) { |
| ALOGV("receiver %p ~ Invoking vsync handler.", this); |
| env->CallVoidMethod(receiverObj.get(), |
| gDisplayEventReceiverClassInfo.dispatchVsync, timestamp, id, count); |
| ALOGV("receiver %p ~ Returned from vsync handler.", this); |
| } |
| |
| mMessageQueue->raiseAndClearException(env, "dispatchVsync"); |
| } |
| |
| void NativeDisplayEventReceiver::dispatchHotplug(nsecs_t timestamp, int32_t id, bool connected) { |
| JNIEnv* env = AndroidRuntime::getJNIEnv(); |
| |
| ScopedLocalRef<jobject> receiverObj(env, jniGetReferent(env, mReceiverWeakGlobal)); |
| if (receiverObj.get()) { |
| ALOGV("receiver %p ~ Invoking hotplug handler.", this); |
| env->CallVoidMethod(receiverObj.get(), |
| gDisplayEventReceiverClassInfo.dispatchHotplug, timestamp, id, connected); |
| ALOGV("receiver %p ~ Returned from hotplug handler.", this); |
| } |
| |
| mMessageQueue->raiseAndClearException(env, "dispatchHotplug"); |
| } |
| |
| |
| static jlong nativeInit(JNIEnv* env, jclass clazz, jobject receiverWeak, |
| jobject messageQueueObj) { |
| sp<MessageQueue> messageQueue = android_os_MessageQueue_getMessageQueue(env, messageQueueObj); |
| if (messageQueue == NULL) { |
| jniThrowRuntimeException(env, "MessageQueue is not initialized."); |
| return 0; |
| } |
| |
| sp<NativeDisplayEventReceiver> receiver = new NativeDisplayEventReceiver(env, |
| receiverWeak, messageQueue); |
| status_t status = receiver->initialize(); |
| if (status) { |
| String8 message; |
| message.appendFormat("Failed to initialize display event receiver. status=%d", status); |
| jniThrowRuntimeException(env, message.string()); |
| return 0; |
| } |
| |
| receiver->incStrong(gDisplayEventReceiverClassInfo.clazz); // retain a reference for the object |
| return reinterpret_cast<jlong>(receiver.get()); |
| } |
| |
| static void nativeDispose(JNIEnv* env, jclass clazz, jlong receiverPtr) { |
| NativeDisplayEventReceiver* receiver = |
| reinterpret_cast<NativeDisplayEventReceiver*>(receiverPtr); |
| receiver->dispose(); |
| receiver->decStrong(gDisplayEventReceiverClassInfo.clazz); // drop reference held by the object |
| } |
| |
| static void nativeScheduleVsync(JNIEnv* env, jclass clazz, jlong receiverPtr) { |
| sp<NativeDisplayEventReceiver> receiver = |
| reinterpret_cast<NativeDisplayEventReceiver*>(receiverPtr); |
| status_t status = receiver->scheduleVsync(); |
| if (status) { |
| String8 message; |
| message.appendFormat("Failed to schedule next vertical sync pulse. status=%d", status); |
| jniThrowRuntimeException(env, message.string()); |
| } |
| } |
| |
| |
| static const JNINativeMethod gMethods[] = { |
| /* name, signature, funcPtr */ |
| { "nativeInit", |
| "(Ljava/lang/ref/WeakReference;Landroid/os/MessageQueue;)J", |
| (void*)nativeInit }, |
| { "nativeDispose", |
| "(J)V", |
| (void*)nativeDispose }, |
| { "nativeScheduleVsync", "!(J)V", |
| (void*)nativeScheduleVsync } |
| }; |
| |
| int register_android_view_DisplayEventReceiver(JNIEnv* env) { |
| int res = RegisterMethodsOrDie(env, "android/view/DisplayEventReceiver", gMethods, |
| NELEM(gMethods)); |
| |
| jclass clazz = FindClassOrDie(env, "android/view/DisplayEventReceiver"); |
| gDisplayEventReceiverClassInfo.clazz = MakeGlobalRefOrDie(env, clazz); |
| |
| gDisplayEventReceiverClassInfo.dispatchVsync = GetMethodIDOrDie(env, |
| gDisplayEventReceiverClassInfo.clazz, "dispatchVsync", "(JII)V"); |
| gDisplayEventReceiverClassInfo.dispatchHotplug = GetMethodIDOrDie(env, |
| gDisplayEventReceiverClassInfo.clazz, "dispatchHotplug", "(JIZ)V"); |
| |
| return res; |
| } |
| |
| } // namespace android |