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      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.audio;
     18 
     19 public interface PlayerFocusEnforcer {
     20 
     21     /**
     22      * Ducks the players associated with the "loser" focus owner (i.e. same UID). Returns true if
     23      * at least one active player was found and ducked, false otherwise.
     24      * @param winner
     25      * @param loser
     26      * @return
     27      */
     28     public boolean duckPlayers(FocusRequester winner, FocusRequester loser, boolean forceDuck);
     29 
     30     public void unduckPlayers(FocusRequester winner);
     31 
     32     public void mutePlayersForCall(int[] usagesToMute);
     33 
     34     public void unmutePlayersForCall();
     35 }