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/*
* Copyright (C) 2017 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 "libdisplayservicehidl"
#include <displayservice/DisplayEventReceiver.h>
#include <android-base/logging.h>
#include <android/frameworks/displayservice/1.0/BpHwEventCallback.h>
#include <thread>
namespace android {
namespace frameworks {
namespace displayservice {
namespace V1_0 {
namespace implementation {
sp<Looper> getLooper() {
static sp<Looper> looper = []() {
sp<Looper> looper = new Looper(false /* allowNonCallbacks */);
std::thread{[&](){
int pollResult = looper->pollAll(-1 /* timeout */);
LOG(ERROR) << "Looper::pollAll returns unexpected " << pollResult;
}}.detach();
return looper;
}();
return looper;
}
DisplayEventReceiver::AttachedEvent::AttachedEvent(const sp<IEventCallback> &callback)
: mCallback(callback)
{
mLooperAttached = getLooper()->addFd(mFwkReceiver.getFd(),
Looper::POLL_CALLBACK,
Looper::EVENT_INPUT,
this,
nullptr);
}
DisplayEventReceiver::AttachedEvent::~AttachedEvent() {
if (!detach()) {
LOG(ERROR) << "Could not remove fd from looper.";
}
}
bool DisplayEventReceiver::AttachedEvent::detach() {
if (!valid()) {
return true;
}
return getLooper()->removeFd(mFwkReceiver.getFd());
}
bool DisplayEventReceiver::AttachedEvent::valid() const {
return mFwkReceiver.initCheck() == OK && mLooperAttached;
}
DisplayEventReceiver::FwkReceiver &DisplayEventReceiver::AttachedEvent::receiver() {
return mFwkReceiver;
}
int DisplayEventReceiver::AttachedEvent::handleEvent(int fd, int events, void* /* data */) {
CHECK(fd == mFwkReceiver.getFd());
if (events & (Looper::EVENT_ERROR | Looper::EVENT_HANGUP)) {
LOG(ERROR) << "AttachedEvent handleEvent received error or hangup:" << events;
return 0; // remove the callback
}
if (!(events & Looper::EVENT_INPUT)) {
LOG(ERROR) << "AttachedEvent handleEvent unhandled poll event:" << events;
return 1; // keep the callback
}
constexpr size_t SIZE = 1;
ssize_t n;
FwkReceiver::Event buf[SIZE];
while ((n = mFwkReceiver.getEvents(buf, SIZE)) > 0) {
for (size_t i = 0; i < static_cast<size_t>(n); ++i) {
const FwkReceiver::Event &event = buf[i];
uint32_t type = event.header.type;
uint64_t timestamp = event.header.timestamp;
switch(buf[i].header.type) {
case FwkReceiver::DISPLAY_EVENT_VSYNC: {
auto ret = mCallback->onVsync(timestamp, event.vsync.count);
if (!ret.isOk()) {
LOG(ERROR) << "AttachedEvent handleEvent fails on onVsync callback"
<< " because of " << ret.description();
return 0; // remove the callback
}
} break;
case FwkReceiver::DISPLAY_EVENT_HOTPLUG: {
auto ret = mCallback->onHotplug(timestamp, event.hotplug.connected);
if (!ret.isOk()) {
LOG(ERROR) << "AttachedEvent handleEvent fails on onHotplug callback"
<< " because of " << ret.description();
return 0; // remove the callback
}
} break;
default: {
LOG(ERROR) << "AttachedEvent handleEvent unknown type: " << type;
}
}
}
}
return 1; // keep on going
}
Return<Status> DisplayEventReceiver::init(const sp<IEventCallback>& callback) {
std::unique_lock<std::mutex> lock(mMutex);
if (mAttached != nullptr || callback == nullptr) {
return Status::BAD_VALUE;
}
mAttached = new AttachedEvent(callback);
return mAttached->valid() ? Status::SUCCESS : Status::UNKNOWN;
}
Return<Status> DisplayEventReceiver::setVsyncRate(int32_t count) {
std::unique_lock<std::mutex> lock(mMutex);
if (mAttached == nullptr || count < 0) {
return Status::BAD_VALUE;
}
bool success = OK == mAttached->receiver().setVsyncRate(count);
return success ? Status::SUCCESS : Status::UNKNOWN;
}
Return<Status> DisplayEventReceiver::requestNextVsync() {
std::unique_lock<std::mutex> lock(mMutex);
if (mAttached == nullptr) {
return Status::BAD_VALUE;
}
bool success = OK == mAttached->receiver().requestNextVsync();
return success ? Status::SUCCESS : Status::UNKNOWN;
}
Return<Status> DisplayEventReceiver::close() {
std::unique_lock<std::mutex> lock(mMutex);
if (mAttached == nullptr) {
return Status::BAD_VALUE;
}
bool success = mAttached->detach();
mAttached = nullptr;
return success ? Status::SUCCESS : Status::UNKNOWN;
}
} // namespace implementation
} // namespace V1_0
} // namespace displayservice
} // namespace frameworks
} // namespace android
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