1 /** 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.server.broadcastradio.hal2; 18 19 import android.annotation.NonNull; 20 import android.os.RemoteException; 21 22 enum FrequencyBand { 23 UNKNOWN, 24 FM, 25 AM_LW, 26 AM_MW, 27 AM_SW, 28 }; 29 30 class Utils { 31 private static final String TAG = "BcRadio2Srv.utils"; 32 33 static FrequencyBand getBand(int freq) { 34 // keep in sync with hardware/interfaces/broadcastradio/common/utils2x/Utils.cpp 35 if (freq < 30) return FrequencyBand.UNKNOWN; 36 if (freq < 500) return FrequencyBand.AM_LW; 37 if (freq < 1705) return FrequencyBand.AM_MW; 38 if (freq < 30000) return FrequencyBand.AM_SW; 39 if (freq < 60000) return FrequencyBand.UNKNOWN; 40 if (freq < 110000) return FrequencyBand.FM; 41 return FrequencyBand.UNKNOWN; 42 } 43 44 interface FuncThrowingRemoteException<T> { 45 T exec() throws RemoteException; 46 } 47 48 static <T> T maybeRethrow(@NonNull FuncThrowingRemoteException<T> r) { 49 try { 50 return r.exec(); 51 } catch (RemoteException ex) { 52 ex.rethrowFromSystemServer(); 53 return null; // unreachable 54 } 55 } 56 57 interface VoidFuncThrowingRemoteException { 58 void exec() throws RemoteException; 59 } 60 61 static void maybeRethrow(@NonNull VoidFuncThrowingRemoteException r) { 62 try { 63 r.exec(); 64 } catch (RemoteException ex) { 65 ex.rethrowFromSystemServer(); 66 } 67 } 68 } 69
