1 /** 2 * Copyright (c) 2020, 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 android.media; 18 19 import android.media.IResourceObserver; 20 import android.media.MediaObservableFilter; 21 22 /** 23 * IResourceObserverService interface for registering an IResourceObserver 24 * callback to receive status updates about observable media resources. 25 * 26 * {@hide} 27 */ 28 interface IResourceObserverService { 29 30 /** 31 * Register an observer on the IResourceObserverService to receive 32 * status updates for observable resources. 33 * 34 * @param observer the observer to register. 35 * @param filters an array of filters for resources and events to receive 36 * updates for. 37 */ registerObserver( IResourceObserver observer, in MediaObservableFilter[] filters)38 void registerObserver( 39 IResourceObserver observer, 40 in MediaObservableFilter[] filters); 41 42 /** 43 * Unregister an observer from the IResourceObserverService. 44 * The observer will stop receiving the status updates. 45 * 46 * @param observer the observer to unregister. 47 */ unregisterObserver(IResourceObserver observer)48 void unregisterObserver(IResourceObserver observer); 49 } 50