/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "DisplayEventReceiver"
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//#define LOG_NDEBUG 0
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#include <nativehelper/JNIHelp.h>
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#include <inttypes.h>
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#include <android_runtime/AndroidRuntime.h>
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#include <androidfw/DisplayEventDispatcher.h>
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#include <utils/Log.h>
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#include <utils/Looper.h>
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#include <utils/threads.h>
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#include <gui/DisplayEventReceiver.h>
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#include "android_os_MessageQueue.h"
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#include <nativehelper/ScopedLocalRef.h>
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#include "core_jni_helpers.h"
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namespace android {
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static struct {
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jclass clazz;
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jmethodID dispatchVsync;
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jmethodID dispatchHotplug;
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jmethodID dispatchConfigChanged;
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} gDisplayEventReceiverClassInfo;
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class NativeDisplayEventReceiver : public DisplayEventDispatcher {
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public:
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NativeDisplayEventReceiver(JNIEnv* env,
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jobject receiverWeak, const sp<MessageQueue>& messageQueue, jint vsyncSource);
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void dispose();
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protected:
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virtual ~NativeDisplayEventReceiver();
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private:
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jobject mReceiverWeakGlobal;
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sp<MessageQueue> mMessageQueue;
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DisplayEventReceiver mReceiver;
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void dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId, uint32_t count) override;
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void dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId, bool connected) override;
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void dispatchConfigChanged(nsecs_t timestamp, PhysicalDisplayId displayId,
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int32_t configId) override;
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};
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NativeDisplayEventReceiver::NativeDisplayEventReceiver(JNIEnv* env,
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jobject receiverWeak, const sp<MessageQueue>& messageQueue, jint vsyncSource) :
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DisplayEventDispatcher(messageQueue->getLooper(),
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static_cast<ISurfaceComposer::VsyncSource>(vsyncSource)),
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mReceiverWeakGlobal(env->NewGlobalRef(receiverWeak)),
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mMessageQueue(messageQueue) {
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ALOGV("receiver %p ~ Initializing display event receiver.", this);
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}
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NativeDisplayEventReceiver::~NativeDisplayEventReceiver() {
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JNIEnv* env = AndroidRuntime::getJNIEnv();
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env->DeleteGlobalRef(mReceiverWeakGlobal);
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ALOGV("receiver %p ~ dtor display event receiver.", this);
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}
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void NativeDisplayEventReceiver::dispose() {
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ALOGV("receiver %p ~ Disposing display event receiver.", this);
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DisplayEventDispatcher::dispose();
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}
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void NativeDisplayEventReceiver::dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId,
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uint32_t count) {
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JNIEnv* env = AndroidRuntime::getJNIEnv();
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ScopedLocalRef<jobject> receiverObj(env, jniGetReferent(env, mReceiverWeakGlobal));
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if (receiverObj.get()) {
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ALOGV("receiver %p ~ Invoking vsync handler.", this);
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env->CallVoidMethod(receiverObj.get(),
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gDisplayEventReceiverClassInfo.dispatchVsync, timestamp, displayId, count);
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ALOGV("receiver %p ~ Returned from vsync handler.", this);
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}
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mMessageQueue->raiseAndClearException(env, "dispatchVsync");
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}
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void NativeDisplayEventReceiver::dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId,
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bool connected) {
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JNIEnv* env = AndroidRuntime::getJNIEnv();
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ScopedLocalRef<jobject> receiverObj(env, jniGetReferent(env, mReceiverWeakGlobal));
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if (receiverObj.get()) {
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ALOGV("receiver %p ~ Invoking hotplug handler.", this);
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env->CallVoidMethod(receiverObj.get(),
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gDisplayEventReceiverClassInfo.dispatchHotplug, timestamp, displayId, connected);
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ALOGV("receiver %p ~ Returned from hotplug handler.", this);
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}
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mMessageQueue->raiseAndClearException(env, "dispatchHotplug");
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}
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void NativeDisplayEventReceiver::dispatchConfigChanged(nsecs_t timestamp,
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PhysicalDisplayId displayId,
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int32_t configId) {
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JNIEnv* env = AndroidRuntime::getJNIEnv();
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ScopedLocalRef<jobject> receiverObj(env, jniGetReferent(env, mReceiverWeakGlobal));
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if (receiverObj.get()) {
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ALOGV("receiver %p ~ Invoking config changed handler.", this);
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env->CallVoidMethod(receiverObj.get(),
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gDisplayEventReceiverClassInfo.dispatchConfigChanged,
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timestamp, displayId, configId);
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ALOGV("receiver %p ~ Returned from config changed handler.", this);
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}
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mMessageQueue->raiseAndClearException(env, "dispatchConfigChanged");
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}
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static jlong nativeInit(JNIEnv* env, jclass clazz, jobject receiverWeak,
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jobject messageQueueObj, jint vsyncSource) {
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sp<MessageQueue> messageQueue = android_os_MessageQueue_getMessageQueue(env, messageQueueObj);
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if (messageQueue == NULL) {
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jniThrowRuntimeException(env, "MessageQueue is not initialized.");
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return 0;
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}
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sp<NativeDisplayEventReceiver> receiver = new NativeDisplayEventReceiver(env,
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receiverWeak, messageQueue, vsyncSource);
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status_t status = receiver->initialize();
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if (status) {
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String8 message;
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message.appendFormat("Failed to initialize display event receiver. status=%d", status);
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jniThrowRuntimeException(env, message.string());
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return 0;
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}
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receiver->incStrong(gDisplayEventReceiverClassInfo.clazz); // retain a reference for the object
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return reinterpret_cast<jlong>(receiver.get());
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}
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static void nativeDispose(JNIEnv* env, jclass clazz, jlong receiverPtr) {
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NativeDisplayEventReceiver* receiver =
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reinterpret_cast<NativeDisplayEventReceiver*>(receiverPtr);
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receiver->dispose();
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receiver->decStrong(gDisplayEventReceiverClassInfo.clazz); // drop reference held by the object
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}
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static void nativeScheduleVsync(JNIEnv* env, jclass clazz, jlong receiverPtr) {
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sp<NativeDisplayEventReceiver> receiver =
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reinterpret_cast<NativeDisplayEventReceiver*>(receiverPtr);
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status_t status = receiver->scheduleVsync();
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if (status) {
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String8 message;
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message.appendFormat("Failed to schedule next vertical sync pulse. status=%d", status);
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jniThrowRuntimeException(env, message.string());
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}
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}
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static const JNINativeMethod gMethods[] = {
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/* name, signature, funcPtr */
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{ "nativeInit",
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"(Ljava/lang/ref/WeakReference;Landroid/os/MessageQueue;I)J",
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(void*)nativeInit },
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{ "nativeDispose",
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"(J)V",
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(void*)nativeDispose },
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// @FastNative
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{ "nativeScheduleVsync", "(J)V",
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(void*)nativeScheduleVsync }
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};
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int register_android_view_DisplayEventReceiver(JNIEnv* env) {
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int res = RegisterMethodsOrDie(env, "android/view/DisplayEventReceiver", gMethods,
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NELEM(gMethods));
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jclass clazz = FindClassOrDie(env, "android/view/DisplayEventReceiver");
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gDisplayEventReceiverClassInfo.clazz = MakeGlobalRefOrDie(env, clazz);
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gDisplayEventReceiverClassInfo.dispatchVsync = GetMethodIDOrDie(env,
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gDisplayEventReceiverClassInfo.clazz, "dispatchVsync", "(JJI)V");
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gDisplayEventReceiverClassInfo.dispatchHotplug = GetMethodIDOrDie(env,
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gDisplayEventReceiverClassInfo.clazz, "dispatchHotplug", "(JJZ)V");
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gDisplayEventReceiverClassInfo.dispatchConfigChanged = GetMethodIDOrDie(env,
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gDisplayEventReceiverClassInfo.clazz, "dispatchConfigChanged", "(JJI)V");
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return res;
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}
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} // namespace android
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