1 /*
2  * Copyright (C) 2023 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.media;
18 
19 import android.Manifest;
20 import android.annotation.Nullable;
21 import android.annotation.RequiresPermission;
22 import android.media.AudioAttributes;
23 import android.media.AudioManager;
24 import android.media.audiopolicy.AudioProductStrategy;
25 
26 /** Holds utils related to routing in the audio framework. */
27 /* package */ final class AudioRoutingUtils {
28 
29     /* package */ static final AudioAttributes ATTRIBUTES_MEDIA =
30             new AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_MEDIA).build();
31 
32     @RequiresPermission(Manifest.permission.MODIFY_AUDIO_ROUTING)
33     @Nullable
getMediaAudioProductStrategy()34     /* package */ static AudioProductStrategy getMediaAudioProductStrategy() {
35         for (AudioProductStrategy strategy : AudioManager.getAudioProductStrategies()) {
36             if (strategy.supportsAudioAttributes(AudioRoutingUtils.ATTRIBUTES_MEDIA)) {
37                 return strategy;
38             }
39         }
40         return null;
41     }
42 
AudioRoutingUtils()43     private AudioRoutingUtils() {
44         // no-op to prevent instantiation.
45     }
46 }
47