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* Audio types feature * docs * cleanup * audio docs
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livekit-android-sdk/src/main/java/io/livekit/android/audio/AudioFocusHandler.kt
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| /* | ||
| * Copyright 2023 LiveKit, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| package io.livekit.android.audio | ||
|
|
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| import android.content.Context | ||
| import android.media.AudioAttributes | ||
| import android.media.AudioFocusRequest | ||
| import android.media.AudioManager | ||
| import android.os.Build | ||
| import androidx.annotation.RequiresApi | ||
| import javax.inject.Inject | ||
| import javax.inject.Singleton | ||
|
|
||
| /** | ||
| * A basic [AudioHandler] that manages audio focus while started. | ||
| */ | ||
| @Singleton | ||
| open class AudioFocusHandler | ||
| @Inject | ||
| constructor(context: Context) : AudioHandler { | ||
|
|
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| /** | ||
| * The audio focus mode to use while started. | ||
| * | ||
| * Defaults to [AudioManager.AUDIOFOCUS_GAIN]. | ||
| */ | ||
| var focusMode: Int = AudioManager.AUDIOFOCUS_GAIN | ||
|
|
||
| /** | ||
| * The audio stream type to use when requesting audio focus on pre-O devices. | ||
| * | ||
| * Defaults to [AudioManager.STREAM_MUSIC]. | ||
| * | ||
| * Refer to this [compatibility table](https://source.android.com/docs/core/audio/attributes#compatibility) | ||
| * to ensure that your values match between android versions. | ||
| */ | ||
| var audioStreamType: Int = AudioManager.STREAM_MUSIC | ||
|
|
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| /** | ||
| * The audio attribute usage type to use when requesting audio focus on devices O and beyond. | ||
| * | ||
| * Defaults to [AudioAttributes.USAGE_MEDIA]. | ||
| * | ||
| * Refer to this [compatibility table](https://source.android.com/docs/core/audio/attributes#compatibility) | ||
| * to ensure that your values match between android versions. | ||
| */ | ||
| var audioAttributeUsageType: Int = AudioAttributes.USAGE_MEDIA | ||
|
|
||
| /** | ||
| * The audio attribute content type to use when requesting audio focus on devices O and beyond. | ||
| * | ||
| * Defaults to [AudioAttributes.CONTENT_TYPE_SPEECH]. | ||
| * | ||
| * Refer to this [compatibility table](https://source.android.com/docs/core/audio/attributes#compatibility) | ||
| * to ensure that your values match between android versions. | ||
| */ | ||
| var audioAttributeContentType: Int = AudioAttributes.CONTENT_TYPE_SPEECH | ||
|
|
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| private val audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager | ||
| private var audioRequest: AudioFocusRequest? = null | ||
| private var audioFocusListener = AudioManager.OnAudioFocusChangeListener { | ||
| onAudioFocusChangeListener?.onAudioFocusChange(it) | ||
| } | ||
|
|
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| var onAudioFocusChangeListener: AudioManager.OnAudioFocusChangeListener? = null | ||
|
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| override fun start() { | ||
| if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { | ||
| audioRequest = createAudioRequest() | ||
| audioRequest?.let { audioManager.requestAudioFocus(it) } | ||
| } else { | ||
| @Suppress("DEPRECATION") | ||
| audioManager.requestAudioFocus(audioFocusListener, audioStreamType, focusMode) | ||
| } | ||
| } | ||
|
|
||
| override fun stop() { | ||
| if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) { | ||
| audioRequest?.let { audioManager.abandonAudioFocusRequest(it) } | ||
| audioRequest = null | ||
| } else { | ||
| @Suppress("DEPRECATION") | ||
| audioManager.abandonAudioFocus(onAudioFocusChangeListener) | ||
| } | ||
| } | ||
|
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||
| @RequiresApi(Build.VERSION_CODES.O) | ||
| open fun createAudioRequest(): AudioFocusRequest { | ||
| return AudioFocusRequest.Builder(focusMode) | ||
| .setOnAudioFocusChangeListener(audioFocusListener) | ||
| .setAudioAttributes( | ||
| AudioAttributes.Builder() | ||
| .setUsage(audioAttributeUsageType) | ||
| .setContentType(audioAttributeContentType) | ||
| .build() | ||
| ) | ||
| .build() | ||
| } | ||
| } |
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