2022-05-08 16:11:08 +05:30
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package com.github.libretube
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import android.content.Context
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2022-05-27 01:08:25 +05:30
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import android.support.v4.media.session.MediaSessionCompat
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import com.github.libretube.obj.Streams
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import com.github.libretube.util.DescriptionAdapter
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import com.github.libretube.util.RetrofitInstance
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import com.google.android.exoplayer2.C
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import com.google.android.exoplayer2.ExoPlayer
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import com.google.android.exoplayer2.MediaItem
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import com.google.android.exoplayer2.audio.AudioAttributes
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import com.google.android.exoplayer2.ext.mediasession.MediaSessionConnector
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import com.google.android.exoplayer2.ui.PlayerNotificationManager
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import gen._base._base_java__rjava_resources.srcjar.R.id.title
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import kotlinx.coroutines.launch
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import kotlinx.coroutines.runBlocking
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/**
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* Loads the selected video audio in background mode with a notification area.
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*/
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class BackgroundMode {
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/**
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* The response that gets when called the Api.
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*/
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private var response: Streams? = null
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/**
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* The [ExoPlayer] player. Followed tutorial [here](https://developer.android.com/codelabs/exoplayer-intro)
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*/
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private var player: ExoPlayer? = null
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private var playWhenReadyPlayer = true
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/**
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* The [MediaSessionCompat] for the [response].
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*/
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private lateinit var mediaSession: MediaSessionCompat
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/**
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* The [MediaSessionConnector] to connect with the [mediaSession] and implement it with the [player].
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*/
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private lateinit var mediaSessionConnector: MediaSessionConnector
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/**
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* The [PlayerNotificationManager] to load the [mediaSession] content on it.
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*/
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private lateinit var playerNotification: PlayerNotificationManager
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/**
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* Initializes the [player] with the [MediaItem].
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*/
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private fun initializePlayer(c: Context) {
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/**
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* The [audioAttributes] handle the audio focus of the [player]
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*/
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val audioAttributes = AudioAttributes.Builder()
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.setUsage(C.USAGE_MEDIA)
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.setContentType(C.CONTENT_TYPE_MUSIC)
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.build()
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if (player == null) {
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player = ExoPlayer.Builder(c)
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.setAudioAttributes(audioAttributes, true)
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.build()
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}
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setMediaItem(c)
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}
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/**
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* Initializes the [playerNotification] attached to the [player] and shows it.
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*/
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private fun initializePlayerNotification(c: Context, streams: Streams) {
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playerNotification = PlayerNotificationManager
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.Builder(c, 1, "background_mode")
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// set the description of the notification
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.setMediaDescriptionAdapter(
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DescriptionAdapter(streams.title!!, streams.uploader!!, streams.thumbnailUrl!!)
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)
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.build()
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playerNotification.apply {
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setPlayer(player)
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setUsePreviousAction(false)
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setUseNextAction(false)
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setMediaSessionToken(mediaSession.sessionToken)
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}
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}
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/**
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* Sets the [MediaItem] with the [response] into the [player]. Also creates a [MediaSessionConnector]
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* with the [mediaSession] and attach it to the [player].
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*/
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private fun setMediaItem(c: Context) {
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response?.let {
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val mediaItem = MediaItem.Builder().setUri(it.hls!!).build()
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player?.setMediaItem(mediaItem)
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}
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mediaSession = MediaSessionCompat(c, this.javaClass.name)
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mediaSession.isActive = true
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mediaSessionConnector = MediaSessionConnector(mediaSession)
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mediaSessionConnector.setPlayer(player)
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}
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/**
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* Gets the video data and prepares the [player].
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*/
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fun playOnBackgroundMode(c: Context, videoId: String, seekToPosition: Long) {
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runBlocking {
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val job = launch {
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response = RetrofitInstance.api.getStreams(videoId)
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}
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// Wait until the job is done, to load correctly later in the player
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job.join()
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initializePlayer(c)
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initializePlayerNotification(c, response!!)
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player?.apply {
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playWhenReady = playWhenReadyPlayer
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prepare()
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}
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if (!seekToPosition.equals(0)) player?.seekTo(seekToPosition)
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}
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}
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/**
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* Creates a singleton of this class, to not create a new [player] every time.
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*/
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companion object {
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private var INSTANCE: BackgroundMode? = null
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fun getInstance(): BackgroundMode {
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if (INSTANCE == null) INSTANCE = BackgroundMode()
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return INSTANCE!!
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}
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}
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}
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