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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"
#include <string.h>
#include <utils/Errors.h>
#include <gui/DisplayEventReceiver.h>
#include <gui/VsyncEventData.h>
#include <private/gui/ComposerServiceAIDL.h>
#include <private/gui/BitTube.h>
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
DisplayEventReceiver::DisplayEventReceiver(gui::ISurfaceComposer::VsyncSource vsyncSource,
EventRegistrationFlags eventRegistration,
const sp<IBinder>& layerHandle) {
sp<gui::ISurfaceComposer> sf(ComposerServiceAIDL::getComposerService());
if (sf != nullptr) {
mEventConnection = nullptr;
binder::Status status =
sf->createDisplayEventConnection(vsyncSource,
static_cast<
gui::ISurfaceComposer::EventRegistration>(
eventRegistration.get()),
layerHandle, &mEventConnection);
if (status.isOk() && mEventConnection != nullptr) {
mDataChannel = std::make_unique<gui::BitTube>();
status = mEventConnection->stealReceiveChannel(mDataChannel.get());
if (!status.isOk()) {
ALOGE("stealReceiveChannel failed: %s", status.toString8().c_str());
mInitError = std::make_optional<status_t>(status.transactionError());
mDataChannel.reset();
mEventConnection.clear();
}
} else {
ALOGE("DisplayEventConnection creation failed: status=%s", status.toString8().c_str());
}
}
}
DisplayEventReceiver::~DisplayEventReceiver() {
}
status_t DisplayEventReceiver::initCheck() const {
if (mDataChannel != nullptr)
return NO_ERROR;
return mInitError.has_value() ? mInitError.value() : NO_INIT;
}
int DisplayEventReceiver::getFd() const {
if (mDataChannel == nullptr) return mInitError.has_value() ? mInitError.value() : NO_INIT;
return mDataChannel->getFd();
}
status_t DisplayEventReceiver::setVsyncRate(uint32_t count) {
if (int32_t(count) < 0)
return BAD_VALUE;
if (mEventConnection != nullptr) {
mEventConnection->setVsyncRate(count);
return NO_ERROR;
}
return mInitError.has_value() ? mInitError.value() : NO_INIT;
}
status_t DisplayEventReceiver::requestNextVsync() {
if (mEventConnection != nullptr) {
mEventConnection->requestNextVsync();
return NO_ERROR;
}
return mInitError.has_value() ? mInitError.value() : NO_INIT;
}
status_t DisplayEventReceiver::getLatestVsyncEventData(
ParcelableVsyncEventData* outVsyncEventData) const {
if (mEventConnection != nullptr) {
auto status = mEventConnection->getLatestVsyncEventData(outVsyncEventData);
if (!status.isOk()) {
ALOGE("Failed to get latest vsync event data: %s", status.toString8().c_str());
return status.transactionError();
}
return NO_ERROR;
}
return NO_INIT;
}
ssize_t DisplayEventReceiver::getEvents(DisplayEventReceiver::Event* events,
size_t count) {
return DisplayEventReceiver::getEvents(mDataChannel.get(), events, count);
}
ssize_t DisplayEventReceiver::getEvents(gui::BitTube* dataChannel,
Event* events, size_t count)
{
return gui::BitTube::recvObjects(dataChannel, events, count);
}
ssize_t DisplayEventReceiver::sendEvents(Event const* events, size_t count) {
return DisplayEventReceiver::sendEvents(mDataChannel.get(), events, count);
}
ssize_t DisplayEventReceiver::sendEvents(gui::BitTube* dataChannel,
Event const* events, size_t count)
{
return gui::BitTube::sendObjects(dataChannel, events, count);
}
// ---------------------------------------------------------------------------
}; // namespace android
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