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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.
*/
#include <string.h>
#include <utils/Errors.h>
#include <gui/DisplayEventReceiver.h>
#include <gui/IDisplayEventConnection.h>
#include <gui/ISurfaceComposer.h>
#include <private/gui/ComposerService.h>
#include <private/gui/BitTube.h>
// ---------------------------------------------------------------------------
namespace android {
// ---------------------------------------------------------------------------
DisplayEventReceiver::DisplayEventReceiver(ISurfaceComposer::VsyncSource vsyncSource,
ISurfaceComposer::ConfigChanged configChanged) {
sp<ISurfaceComposer> sf(ComposerService::getComposerService());
if (sf != nullptr) {
mEventConnection = sf->createDisplayEventConnection(vsyncSource, configChanged);
if (mEventConnection != nullptr) {
mDataChannel = std::make_unique<gui::BitTube>();
mEventConnection->stealReceiveChannel(mDataChannel.get());
}
}
}
DisplayEventReceiver::~DisplayEventReceiver() {
}
status_t DisplayEventReceiver::initCheck() const {
if (mDataChannel != nullptr)
return NO_ERROR;
return NO_INIT;
}
int DisplayEventReceiver::getFd() const {
if (mDataChannel == nullptr)
return 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 NO_INIT;
}
status_t DisplayEventReceiver::requestNextVsync() {
if (mEventConnection != nullptr) {
mEventConnection->requestNextVsync();
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(gui::BitTube* dataChannel,
Event const* events, size_t count)
{
return gui::BitTube::sendObjects(dataChannel, events, count);
}
// ---------------------------------------------------------------------------
}; // namespace android
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