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/*
* Copyright 2021 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.
*/
#include <android/gui/BnWindowInfosPublisher.h>
#include <android/gui/IWindowInfosPublisher.h>
#include <android/gui/WindowInfosListenerInfo.h>
#include <gui/ISurfaceComposer.h>
#include <gui/TraceUtils.h>
#include <gui/WindowInfosUpdate.h>
#include <scheduler/Time.h>
#include "BackgroundExecutor.h"
#include "WindowInfosListenerInvoker.h"
#undef ATRACE_TAG
#define ATRACE_TAG ATRACE_TAG_GRAPHICS
namespace android {
using gui::DisplayInfo;
using gui::IWindowInfosListener;
using gui::WindowInfo;
void WindowInfosListenerInvoker::addWindowInfosListener(sp<IWindowInfosListener> listener,
gui::WindowInfosListenerInfo* outInfo) {
int64_t listenerId = mNextListenerId++;
outInfo->listenerId = listenerId;
outInfo->windowInfosPublisher = sp<gui::IWindowInfosPublisher>::fromExisting(this);
BackgroundExecutor::getInstance().sendCallbacks(
{[this, listener = std::move(listener), listenerId]() {
ATRACE_NAME("WindowInfosListenerInvoker::addWindowInfosListener");
sp<IBinder> asBinder = IInterface::asBinder(listener);
asBinder->linkToDeath(sp<DeathRecipient>::fromExisting(this));
mWindowInfosListeners.try_emplace(asBinder,
std::make_pair(listenerId, std::move(listener)));
}});
}
void WindowInfosListenerInvoker::removeWindowInfosListener(
const sp<IWindowInfosListener>& listener) {
BackgroundExecutor::getInstance().sendCallbacks({[this, listener]() {
ATRACE_NAME("WindowInfosListenerInvoker::removeWindowInfosListener");
sp<IBinder> asBinder = IInterface::asBinder(listener);
asBinder->unlinkToDeath(sp<DeathRecipient>::fromExisting(this));
mWindowInfosListeners.erase(asBinder);
}});
}
void WindowInfosListenerInvoker::binderDied(const wp<IBinder>& who) {
BackgroundExecutor::getInstance().sendCallbacks({[this, who]() {
ATRACE_NAME("WindowInfosListenerInvoker::binderDied");
auto it = mWindowInfosListeners.find(who);
int64_t listenerId = it->second.first;
mWindowInfosListeners.erase(who);
std::vector<int64_t> vsyncIds;
for (auto& [vsyncId, state] : mUnackedState) {
if (std::find(state.unackedListenerIds.begin(), state.unackedListenerIds.end(),
listenerId) != state.unackedListenerIds.end()) {
vsyncIds.push_back(vsyncId);
}
}
for (int64_t vsyncId : vsyncIds) {
ackWindowInfosReceived(vsyncId, listenerId);
}
}});
}
void WindowInfosListenerInvoker::windowInfosChanged(
gui::WindowInfosUpdate update, WindowInfosReportedListenerSet reportedListeners,
bool forceImmediateCall) {
if (!mDelayInfo) {
mDelayInfo = DelayInfo{
.vsyncId = update.vsyncId,
.frameTime = update.timestamp,
};
}
// If there are unacked messages and this isn't a forced call, then return immediately.
// If a forced window infos change doesn't happen first, the update will be sent after
// the WindowInfosReportedListeners are called. If a forced window infos change happens or
// if there are subsequent delayed messages before this update is sent, then this message
// will be dropped and the listeners will only be called with the latest info. This is done
// to reduce the amount of binder memory used.
if (!mUnackedState.empty() && !forceImmediateCall) {
mDelayedUpdate = std::move(update);
mReportedListeners.merge(reportedListeners);
return;
}
if (mDelayedUpdate) {
mDelayedUpdate.reset();
}
if (CC_UNLIKELY(mWindowInfosListeners.empty())) {
mReportedListeners.merge(reportedListeners);
mDelayInfo.reset();
return;
}
reportedListeners.merge(mReportedListeners);
mReportedListeners.clear();
// Update mUnackedState to include the message we're about to send
auto [it, _] = mUnackedState.try_emplace(update.vsyncId,
UnackedState{.reportedListeners =
std::move(reportedListeners)});
auto& unackedState = it->second;
for (auto& pair : mWindowInfosListeners) {
int64_t listenerId = pair.second.first;
unackedState.unackedListenerIds.push_back(listenerId);
}
mDelayInfo.reset();
updateMaxSendDelay();
// Call the listeners
for (auto& pair : mWindowInfosListeners) {
auto& [listenerId, listener] = pair.second;
auto status = listener->onWindowInfosChanged(update);
if (!status.isOk()) {
ackWindowInfosReceived(update.vsyncId, listenerId);
}
}
}
WindowInfosListenerInvoker::DebugInfo WindowInfosListenerInvoker::getDebugInfo() {
DebugInfo result;
BackgroundExecutor::getInstance().sendCallbacks({[&, this]() {
ATRACE_NAME("WindowInfosListenerInvoker::getDebugInfo");
updateMaxSendDelay();
result = mDebugInfo;
result.pendingMessageCount = mUnackedState.size();
}});
BackgroundExecutor::getInstance().flushQueue();
return result;
}
void WindowInfosListenerInvoker::updateMaxSendDelay() {
if (!mDelayInfo) {
return;
}
nsecs_t delay = TimePoint::now().ns() - mDelayInfo->frameTime;
if (delay > mDebugInfo.maxSendDelayDuration) {
mDebugInfo.maxSendDelayDuration = delay;
mDebugInfo.maxSendDelayVsyncId = VsyncId{mDelayInfo->vsyncId};
}
}
binder::Status WindowInfosListenerInvoker::ackWindowInfosReceived(int64_t vsyncId,
int64_t listenerId) {
BackgroundExecutor::getInstance().sendCallbacks({[this, vsyncId, listenerId]() {
ATRACE_NAME("WindowInfosListenerInvoker::ackWindowInfosReceived");
auto it = mUnackedState.find(vsyncId);
if (it == mUnackedState.end()) {
return;
}
auto& state = it->second;
state.unackedListenerIds.unstable_erase(std::find(state.unackedListenerIds.begin(),
state.unackedListenerIds.end(),
listenerId));
if (!state.unackedListenerIds.empty()) {
return;
}
WindowInfosReportedListenerSet reportedListeners{std::move(state.reportedListeners)};
mUnackedState.erase(vsyncId);
for (const auto& reportedListener : reportedListeners) {
sp<IBinder> asBinder = IInterface::asBinder(reportedListener);
if (asBinder->isBinderAlive()) {
reportedListener->onWindowInfosReported();
}
}
if (!mDelayedUpdate || !mUnackedState.empty()) {
return;
}
gui::WindowInfosUpdate update{std::move(*mDelayedUpdate)};
mDelayedUpdate.reset();
windowInfosChanged(std::move(update), {}, false);
}});
return binder::Status::ok();
}
} // namespace android
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