1 /*
2  * Copyright (C) 2024 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 package com.android.settingslib.bluetooth
17 
18 import kotlinx.coroutines.channels.awaitClose
19 import kotlinx.coroutines.flow.Flow
20 import kotlinx.coroutines.flow.callbackFlow
21 import kotlinx.coroutines.launch
22 
23 /** Returns a [Flow] that emits a [Unit] whenever the headset audio mode changes. */
24 val LocalBluetoothManager.headsetAudioModeChanges: Flow<Unit>
25     get() {
<lambda>null26         return callbackFlow {
27             val callback =
28                 object : BluetoothCallback {
29                     override fun onAudioModeChanged() {
30                         launch { send(Unit) }
31                     }
32                 }
33 
34             eventManager.registerCallback(callback)
35             awaitClose { eventManager.unregisterCallback(callback) }
36         }
37     }
38