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/*
* Copyright (C) 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.
*/
#define LOG_TAG "GnssBatchingAidl"
#include "GnssBatching.h"
#include <aidl/android/hardware/gnss/BnGnss.h>
#include <inttypes.h>
#include <log/log.h>
#include <utils/SystemClock.h>
#include "Utils.h"
namespace aidl::android::hardware::gnss {
using namespace ::android::hardware::gnss;
constexpr int BATCH_SIZE = 10;
std::shared_ptr<IGnssBatchingCallback> GnssBatching::sCallback = nullptr;
GnssBatching::GnssBatching()
: mMinIntervalMs(1000),
mWakeUpOnFifoFull(false),
mBatchedLocations(std::vector<GnssLocation>()) {}
GnssBatching::~GnssBatching() {
cleanup();
}
ndk::ScopedAStatus GnssBatching::init(const std::shared_ptr<IGnssBatchingCallback>& callback) {
ALOGD("init");
std::unique_lock<std::mutex> lock(mMutex);
sCallback = callback;
return ndk::ScopedAStatus::ok();
}
ndk::ScopedAStatus GnssBatching::getBatchSize(int* size) {
ALOGD("getBatchingSize");
*size = BATCH_SIZE;
return ndk::ScopedAStatus::ok();
}
ndk::ScopedAStatus GnssBatching::start(const Options& options) {
ALOGD("start: periodNanos=%" PRId64 ", minDistanceMeters=%f, flags=%d", options.periodNanos,
options.minDistanceMeters, options.flags);
if (mIsActive) {
ALOGW("Gnss has started. Restarting...");
stop();
}
// mMinIntervalMs is not smaller than 1 sec
long periodNanos = (options.periodNanos < 1e9) ? 1e9 : options.periodNanos;
mMinIntervalMs = periodNanos / 1e6;
mWakeUpOnFifoFull = (options.flags & IGnssBatching::WAKEUP_ON_FIFO_FULL) ? true : false;
mMinDistanceMeters = options.minDistanceMeters;
mIsActive = true;
mThread = std::thread([this]() {
while (mIsActive == true) {
const auto location = common::Utils::getMockLocation();
this->batchLocation(location);
std::this_thread::sleep_for(std::chrono::milliseconds(mMinIntervalMs));
}
});
return ndk::ScopedAStatus::ok();
}
ndk::ScopedAStatus GnssBatching::flush() {
ALOGD("flush");
std::vector<GnssLocation> copy = std::vector<GnssLocation>(mBatchedLocations);
ndk::ScopedAStatus status;
if (sCallback != nullptr) {
sCallback->gnssLocationBatchCb(copy);
status = ndk::ScopedAStatus::ok();
} else {
ALOGE("GnssBatchingCallback is null. flush() failed.");
status = ndk::ScopedAStatus::fromServiceSpecificError(IGnss::ERROR_GENERIC);
}
mBatchedLocations.clear();
return status;
}
ndk::ScopedAStatus GnssBatching::stop() {
ALOGD("stop");
// Do not call flush() at stop()
mIsActive = false;
if (mThread.joinable()) {
mThread.join();
}
return ndk::ScopedAStatus::ok();
}
ndk::ScopedAStatus GnssBatching::cleanup() {
ALOGD("cleanup");
std::unique_lock<std::mutex> lock(mMutex);
if (mIsActive) {
stop();
}
flush();
sCallback = nullptr;
return ndk::ScopedAStatus::ok();
}
void GnssBatching::batchLocation(const GnssLocation& location) {
if (mBatchedLocations.size() > BATCH_SIZE) {
mBatchedLocations.erase(mBatchedLocations.begin());
}
mBatchedLocations.push_back(location);
if (mWakeUpOnFifoFull && mBatchedLocations.size() == BATCH_SIZE) {
flush();
}
}
} // namespace aidl::android::hardware::gnss
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