High speed GPS/GNSS Navigation Information Block am: 5d5bac8383 (f405b082) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/location/GnssLocationProvider.java

+35 −7

Original line number	Diff line number	Diff line
		@@ -415,6 +415,12 @@ public class GnssLocationProvider implements LocationProviderInterface {

		private int mYearOfHardware = 0;

		// Set lower than the current ITAR limit of 600m/s to allow this to trigger even if GPS HAL
		// stops output right at 600m/s, depriving this of the information of a device that reaches
		// greater than 600m/s, and higher than the speed of sound to avoid impacting most use cases.
		private static final float ITAR_SPEED_LIMIT_METERS_PER_SECOND = 400.0F;
		private boolean mItarSpeedLimitExceeded = false;

		private final IGnssStatusProvider mGnssStatusProvider = new IGnssStatusProvider.Stub() {
		@Override
		public void registerGnssStatusCallback(IGnssStatusListener callback) {
		@@ -1400,6 +1406,12 @@ public class GnssLocationProvider implements LocationProviderInterface {
		mStarted = true;
		mSingleShot = singleShot;
		mPositionMode = GPS_POSITION_MODE_STANDALONE;
		// Notify about suppressed output, if speed limit was previously exceeded.
		// Elsewhere, we check again with every speed output reported.
		if (mItarSpeedLimitExceeded) {
		Log.i(TAG, "startNavigating with ITAR limit in place. Output limited " +
		"until slow enough speed reported.");
		}

		boolean agpsEnabled =
		(Settings.Global.getInt(mContext.getContentResolver(),
		@@ -1486,7 +1498,17 @@ public class GnssLocationProvider implements LocationProviderInterface {
		* called from native code to update our position.
		*/
		private void reportLocation(int flags, double latitude, double longitude, double altitude,
		float speed, float bearing, float accuracy, long timestamp) {
		float speedMetersPerSecond, float bearing, float accuracy, long timestamp) {
		if ((flags & LOCATION_HAS_SPEED) == LOCATION_HAS_SPEED) {
		mItarSpeedLimitExceeded = speedMetersPerSecond > ITAR_SPEED_LIMIT_METERS_PER_SECOND;
		}

		if (mItarSpeedLimitExceeded) {
		Log.i(TAG, "Hal reported a speed in excess of ITAR limit." +
		" GPS/GNSS Navigation output blocked.");
		return; // No output of location allowed
		}

		if (VERBOSE) Log.v(TAG, "reportLocation lat: " + latitude + " long: " + longitude +
		" timestamp: " + timestamp);

		@@ -1506,7 +1528,7 @@ public class GnssLocationProvider implements LocationProviderInterface {
		mLocation.removeAltitude();
		}
		if ((flags & LOCATION_HAS_SPEED) == LOCATION_HAS_SPEED) {
		mLocation.setSpeed(speed);
		mLocation.setSpeed(speedMetersPerSecond);
		} else {
		mLocation.removeSpeed();
		}
		@@ -1690,24 +1712,30 @@ public class GnssLocationProvider implements LocationProviderInterface {
		* called from native code to report NMEA data received
		*/
		private void reportNmea(long timestamp) {
		if (!mItarSpeedLimitExceeded) {
		int length = native_read_nmea(mNmeaBuffer, mNmeaBuffer.length);
		String nmea = new String(mNmeaBuffer, 0 /* offset */, length);
		mListenerHelper.onNmeaReceived(timestamp, nmea);
		}
		}

		/**
		* called from native code - Gps measurements callback
		*/
		private void reportMeasurementData(GnssMeasurementsEvent event) {
		if (!mItarSpeedLimitExceeded) {
		mGnssMeasurementsProvider.onMeasurementsAvailable(event);
		}
		}

		/**
		* called from native code - GPS navigation message callback
		*/
		private void reportNavigationMessage(GnssNavigationMessage event) {
		if (!mItarSpeedLimitExceeded) {
		mGnssNavigationMessageProvider.onNavigationMessageAvailable(event);
		}
		}

		/**
		* called from native code to inform us what the GPS engine capabilities are