Merge "Adds a report delay floor for LE batch scans" (b76c52c3) · Commits · e / os / android_packages_modules_Bluetooth

android/app/src/com/android/bluetooth/gatt/GattService.java

+41 −0

Original line number	Diff line number	Diff line
		@@ -56,6 +56,7 @@ import android.os.ServiceManager;
		import android.os.SystemClock;
		import android.os.UserHandle;
		import android.os.WorkSource;
		import android.provider.DeviceConfig;
		import android.provider.Settings;
		import android.util.Log;

		@@ -100,6 +101,11 @@ public class GattService extends ProfileService {
		private static final int TRUNCATED_RESULT_SIZE = 11;
		private static final int TIME_STAMP_LENGTH = 2;

		/**
		* The default floor value for LE batch scan report delays greater than 0
		*/
		private static final long DEFAULT_REPORT_DELAY_FLOOR = 5000;

		// onFoundLost related constants
		private static final int ADVT_STATE_ONFOUND = 0;
		private static final int ADVT_STATE_ONLOST = 1;
		@@ -2100,6 +2106,7 @@ public class GattService extends ProfileService {
		if (needsPrivilegedPermissionForScan(settings)) {
		enforcePrivilegedPermission();
		}
		settings = enforceReportDelayFloor(settings);
		final ScanClient scanClient = new ScanClient(scannerId, settings, filters, storages);
		scanClient.userHandle = UserHandle.of(UserHandle.getCallingUserId());
		mAppOps.checkPackage(Binder.getCallingUid(), callingPackage);
		@@ -2146,6 +2153,8 @@ public class GattService extends ProfileService {
		enforcePrivilegedPermission();
		}

		settings = enforceReportDelayFloor(settings);

		UUID uuid = UUID.randomUUID();
		if (DBG) {
		Log.d(TAG, "startScan(PI) - UUID=" + uuid);
		@@ -3275,6 +3284,38 @@ public class GattService extends ProfileService {
		"Need UPDATE_DEVICE_STATS permission");
		}

		/**
		* Ensures the report delay is either 0 or at least the floor value (5000ms)
		*
		* @param settings are the scan settings passed into a request to start le scanning
		* @return the passed in ScanSettings object if the report delay is 0 or above the floor value;
		* a new ScanSettings object with the report delay being the floor value if the original
		* report delay was between 0 and the floor value (exclusive of both)
		*/
		private ScanSettings enforceReportDelayFloor(ScanSettings settings) {
		if (settings.getReportDelayMillis() == 0) {
		return settings;
		}

		long floor = DeviceConfig.getLong(DeviceConfig.NAMESPACE_BLUETOOTH, "report_delay",
		DEFAULT_REPORT_DELAY_FLOOR);

		if (settings.getReportDelayMillis() > floor) {
		return settings;
		} else {
		return new ScanSettings.Builder()
		.setCallbackType(settings.getCallbackType())
		.setLegacy(settings.getLegacy())
		.setMatchMode(settings.getMatchMode())
		.setNumOfMatches(settings.getNumOfMatches())
		.setPhy(settings.getPhy())
		.setReportDelay(floor)
		.setScanMode(settings.getScanMode())
		.setScanResultType(settings.getScanResultType())
		.build();
		}
		}

		private void stopNextService(int serverIf, int status) throws RemoteException {
		if (DBG) {
		Log.d(TAG, "stopNextService() - serverIf=" + serverIf + ", status=" + status);