From 19a6a6a76ca5abedfaf4d4fd871b70bd8ef3eba7 Mon Sep 17 00:00:00 2001
From: Yuchen He <yuchenhe@google.com>
Date: Thu, 13 Jan 2022 18:39:50 +0000
Subject: Add parser to support CSV location data

Bug: 213225295
Test: launch_cvd -cpus 16 -memory_mb 16192  --start_gnss_proxy
--gnss_file_path=/google/data/rw/users/yu/yuchenhe/input.txt (Running blue
dot in Google Maps)

Change-Id: I572315888c2f57ce701e695acb03aa6b28787f31
---
 gnss/common/utils/default/FixLocationParser.cpp | 75 +++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 gnss/common/utils/default/FixLocationParser.cpp

(limited to 'gnss/common/utils/default/FixLocationParser.cpp')

diff --git a/gnss/common/utils/default/FixLocationParser.cpp b/gnss/common/utils/default/FixLocationParser.cpp
new file mode 100644
index 0000000000..f391d96616
--- /dev/null
+++ b/gnss/common/utils/default/FixLocationParser.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2022 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 "FixLocationParser.h"
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace common {
+
+using aidl::android::hardware::gnss::ElapsedRealtime;
+using aidl::android::hardware::gnss::GnssLocation;
+
+std::unique_ptr<GnssLocation> FixLocationParser::getLocationFromInputStr(
+        const std::string& locationStr) {
+    /*
+     * Fix,Provider,LatitudeDegrees,LongitudeDegrees,AltitudeMeters,SpeedMps,
+     * AccuracyMeters,BearingDegrees,UnixTimeMillis,SpeedAccuracyMps,BearingAccuracyDegrees,
+     * elapsedRealtimeNanos
+     */
+    if (locationStr.empty()) {
+        return nullptr;
+    }
+    std::vector<std::string> locationStrRecords;
+    ParseUtils::splitStr(locationStr, LINE_SEPARATOR, locationStrRecords);
+    if (locationStrRecords.empty()) {
+        return nullptr;
+    }
+
+    std::vector<std::string> locationValues;
+    ParseUtils::splitStr(locationStrRecords[0], COMMA_SEPARATOR, locationValues);
+    if (locationValues.size() < 12) {
+        return nullptr;
+    }
+    ElapsedRealtime elapsedRealtime = {
+            .flags = ElapsedRealtime::HAS_TIMESTAMP_NS | ElapsedRealtime::HAS_TIME_UNCERTAINTY_NS,
+            .timestampNs = ::android::elapsedRealtimeNano(),
+            // This is an hardcoded value indicating a 1ms of uncertainty between the two clocks.
+            // In an actual implementation provide an estimate of the synchronization uncertainty
+            // or don't set the field.
+            .timeUncertaintyNs = 1020400};
+
+    GnssLocation location = {
+            .gnssLocationFlags = 0xFF,
+            .latitudeDegrees = ParseUtils::tryParseDouble(locationValues[2], 0),
+            .longitudeDegrees = ParseUtils::tryParseDouble(locationValues[3], 0),
+            .altitudeMeters = ParseUtils::tryParseDouble(locationValues[4], 0),
+            .speedMetersPerSec = ParseUtils::tryParseDouble(locationValues[5], 0),
+            .bearingDegrees = ParseUtils::tryParseDouble(locationValues[7], 0),
+            .horizontalAccuracyMeters = ParseUtils::tryParseDouble(locationValues[6], 0),
+            .verticalAccuracyMeters = ParseUtils::tryParseDouble(locationValues[6], 0),
+            .speedAccuracyMetersPerSecond = ParseUtils::tryParseDouble(locationValues[9], 0),
+            .bearingAccuracyDegrees = ParseUtils::tryParseDouble(locationValues[10], 0),
+            .timestampMillis = ParseUtils::tryParseLongLong(locationValues[8], 0),
+            .elapsedRealtime = elapsedRealtime};
+    return std::make_unique<GnssLocation>(location);
+}
+
+}  // namespace common
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android
\ No newline at end of file
-- 
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