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/*
* 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 <nativehelper/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 <nativehelper/ScopedLocalRef.h>
#include "core_jni_helpers.h"
namespace android {
static struct {
jclass clazz;
jmethodID dispatchVsync;
jmethodID dispatchHotplug;
jmethodID dispatchConfigChanged;
} gDisplayEventReceiverClassInfo;
class NativeDisplayEventReceiver : public DisplayEventDispatcher {
public:
NativeDisplayEventReceiver(JNIEnv* env,
jobject receiverWeak, const sp<MessageQueue>& messageQueue, jint vsyncSource,
jint configChanged);
void dispose();
protected:
virtual ~NativeDisplayEventReceiver();
private:
jobject mReceiverWeakGlobal;
sp<MessageQueue> mMessageQueue;
DisplayEventReceiver mReceiver;
void dispatchVsync(nsecs_t timestamp, PhysicalDisplayId displayId, uint32_t count) override;
void dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId, bool connected) override;
void dispatchConfigChanged(nsecs_t timestamp, PhysicalDisplayId displayId,
int32_t configId) override;
};
NativeDisplayEventReceiver::NativeDisplayEventReceiver(JNIEnv* env,
jobject receiverWeak, const sp<MessageQueue>& messageQueue, jint vsyncSource,
jint configChanged) :
DisplayEventDispatcher(messageQueue->getLooper(),
static_cast<ISurfaceComposer::VsyncSource>(vsyncSource),
static_cast<ISurfaceComposer::ConfigChanged>(configChanged)),
mReceiverWeakGlobal(env->NewGlobalRef(receiverWeak)),
mMessageQueue(messageQueue) {
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, PhysicalDisplayId displayId,
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, displayId, count);
ALOGV("receiver %p ~ Returned from vsync handler.", this);
}
mMessageQueue->raiseAndClearException(env, "dispatchVsync");
}
void NativeDisplayEventReceiver::dispatchHotplug(nsecs_t timestamp, PhysicalDisplayId displayId,
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, displayId, connected);
ALOGV("receiver %p ~ Returned from hotplug handler.", this);
}
mMessageQueue->raiseAndClearException(env, "dispatchHotplug");
}
void NativeDisplayEventReceiver::dispatchConfigChanged(nsecs_t timestamp,
PhysicalDisplayId displayId,
int32_t configId) {
JNIEnv* env = AndroidRuntime::getJNIEnv();
ScopedLocalRef<jobject> receiverObj(env, jniGetReferent(env, mReceiverWeakGlobal));
if (receiverObj.get()) {
ALOGV("receiver %p ~ Invoking config changed handler.", this);
env->CallVoidMethod(receiverObj.get(),
gDisplayEventReceiverClassInfo.dispatchConfigChanged,
timestamp, displayId, configId);
ALOGV("receiver %p ~ Returned from config changed handler.", this);
}
mMessageQueue->raiseAndClearException(env, "dispatchConfigChanged");
}
static jlong nativeInit(JNIEnv* env, jclass clazz, jobject receiverWeak,
jobject messageQueueObj, jint vsyncSource, jint configChanged) {
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, vsyncSource, configChanged);
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;II)J",
(void*)nativeInit },
{ "nativeDispose",
"(J)V",
(void*)nativeDispose },
// @FastNative
{ "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", "(JJI)V");
gDisplayEventReceiverClassInfo.dispatchHotplug = GetMethodIDOrDie(env,
gDisplayEventReceiverClassInfo.clazz, "dispatchHotplug", "(JJZ)V");
gDisplayEventReceiverClassInfo.dispatchConfigChanged = GetMethodIDOrDie(env,
gDisplayEventReceiverClassInfo.clazz, "dispatchConfigChanged", "(JJI)V");
return res;
}
} // namespace android
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