mirror of
https://github.com/libre-tube/LibreTube.git
synced 2024-12-15 23:00:31 +05:30
323 lines
10 KiB
Kotlin
323 lines
10 KiB
Kotlin
package com.github.libretube.services
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import android.app.Notification
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import android.app.NotificationChannel
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import android.app.NotificationManager
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import android.app.Service
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import android.content.Intent
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import android.os.Build
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import android.os.Handler
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import android.os.IBinder
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import android.os.Looper
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import android.widget.Toast
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import com.fasterxml.jackson.databind.ObjectMapper
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import com.github.libretube.BACKGROUND_CHANNEL_ID
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import com.github.libretube.Globals
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import com.github.libretube.PLAYER_NOTIFICATION_ID
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import com.github.libretube.R
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import com.github.libretube.api.RetrofitInstance
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import com.github.libretube.obj.Segment
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import com.github.libretube.obj.Segments
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import com.github.libretube.obj.Streams
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import com.github.libretube.preferences.PreferenceHelper
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import com.github.libretube.preferences.PreferenceKeys
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import com.github.libretube.util.AutoPlayHelper
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import com.github.libretube.util.NowPlayingNotification
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import com.github.libretube.util.PlayerHelper
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import com.github.libretube.util.toID
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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.Player
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import com.google.android.exoplayer2.audio.AudioAttributes
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.Dispatchers
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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 videos audio in background mode with a notification area.
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*/
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class BackgroundMode : Service() {
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/**
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* VideoId of the video
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*/
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private lateinit var videoId: String
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/**
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*PlaylistId for autoplay
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*/
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private var playlistId: String? = null
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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 streams: 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 [AudioAttributes] handle the audio focus of the [player]
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*/
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private lateinit var audioAttributes: AudioAttributes
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/**
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* SponsorBlock Segment data
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*/
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private var segmentData: Segments? = null
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/**
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* [Notification] for the player
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*/
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private lateinit var nowPlayingNotification: NowPlayingNotification
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/**
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* The [videoId] of the next stream for autoplay
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*/
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private var nextStreamId: String? = null
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/**
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* Helper for finding the next video in the playlist
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*/
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private lateinit var autoPlayHelper: AutoPlayHelper
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/**
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* Autoplay Preference
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*/
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private val autoplay = PreferenceHelper.getBoolean(PreferenceKeys.AUTO_PLAY, true)
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/**
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* Setting the required [Notification] for running as a foreground service
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*/
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override fun onCreate() {
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super.onCreate()
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if (Build.VERSION.SDK_INT >= 26) {
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val channelId = BACKGROUND_CHANNEL_ID
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val channel = NotificationChannel(
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channelId,
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"Background Service",
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NotificationManager.IMPORTANCE_DEFAULT
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)
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val notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
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notificationManager.createNotificationChannel(channel)
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val notification: Notification = Notification.Builder(this, channelId)
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.setContentTitle(getString(R.string.app_name))
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.setContentText(getString(R.string.playingOnBackground)).build()
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startForeground(PLAYER_NOTIFICATION_ID, notification)
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}
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}
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/**
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* Initializes the [player] with the [MediaItem].
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*/
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override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
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try {
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// clear the playing queue
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Globals.playingQueue.clear()
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// get the intent arguments
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videoId = intent?.getStringExtra("videoId")!!
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playlistId = intent.getStringExtra("playlistId")
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val position = intent.getLongExtra("position", 0L)
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// initialize the playlist autoPlay Helper
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autoPlayHelper = AutoPlayHelper(playlistId)
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// play the audio in the background
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playAudio(videoId, position)
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} catch (e: Exception) {
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stopForeground(true)
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stopSelf()
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}
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return super.onStartCommand(intent, flags, startId)
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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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private fun playAudio(
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videoId: String,
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seekToPosition: Long = 0
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) {
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// append the video to the playing queue
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Globals.playingQueue += videoId
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runBlocking {
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val job = launch {
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streams = 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()
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setMediaItem()
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// create the notification
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if (!this@BackgroundMode::nowPlayingNotification.isInitialized) {
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nowPlayingNotification = NowPlayingNotification(this@BackgroundMode, player!!)
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}
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nowPlayingNotification.updatePlayerNotification(streams!!)
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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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// seek to the previous position if available
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if (seekToPosition != 0L) player?.seekTo(seekToPosition)
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// set the playback speed
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val playbackSpeed = PreferenceHelper.getString(
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PreferenceKeys.BACKGROUND_PLAYBACK_SPEED,
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"1"
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).toFloat()
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player?.setPlaybackSpeed(playbackSpeed)
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fetchSponsorBlockSegments()
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if (autoplay) setNextStream()
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}
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}
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/**
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* create the player
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*/
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private fun initializePlayer() {
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if (player != null) return
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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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player = ExoPlayer.Builder(this)
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.setAudioAttributes(audioAttributes, true)
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.build()
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/**
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* Listens for changed playbackStates (e.g. pause, end)
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* Plays the next video when the current one ended
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*/
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player!!.addListener(object : Player.Listener {
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override fun onPlaybackStateChanged(@Player.State state: Int) {
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when (state) {
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Player.STATE_ENDED -> {
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if (autoplay) playNextVideo()
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}
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Player.STATE_IDLE -> {
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onDestroy()
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}
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}
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}
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})
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}
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/**
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* set the videoId of the next stream for autoplay
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*/
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private fun setNextStream() {
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if (streams!!.relatedStreams!!.isNotEmpty()) {
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nextStreamId = streams?.relatedStreams!![0].url.toID()
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}
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if (playlistId == null) return
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if (!this::autoPlayHelper.isInitialized) autoPlayHelper = AutoPlayHelper(playlistId!!)
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// search for the next videoId in the playlist
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CoroutineScope(Dispatchers.IO).launch {
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nextStreamId = autoPlayHelper.getNextVideoId(videoId, streams!!.relatedStreams!!)
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}
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}
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/**
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* Plays the first related video to the current (used when the playback of the current video ended)
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*/
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private fun playNextVideo() {
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if (nextStreamId == null || nextStreamId == videoId) return
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val nextQueueVideo = autoPlayHelper.getNextPlayingQueueVideoId(videoId)
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if (nextQueueVideo != null) nextStreamId = nextQueueVideo
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// play new video on background
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this.videoId = nextStreamId!!
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this.segmentData = null
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playAudio(videoId)
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}
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/**
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* Sets the [MediaItem] with the [streams] into the [player]
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*/
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private fun setMediaItem() {
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streams?.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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}
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/**
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* fetch the segments for SponsorBlock
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*/
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private fun fetchSponsorBlockSegments() {
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CoroutineScope(Dispatchers.IO).launch {
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kotlin.runCatching {
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val categories = PlayerHelper.getSponsorBlockCategories()
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if (categories.size > 0) {
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segmentData =
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RetrofitInstance.api.getSegments(
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videoId,
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ObjectMapper().writeValueAsString(categories)
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)
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checkForSegments()
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}
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}
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}
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}
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/**
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* check for SponsorBlock segments
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*/
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private fun checkForSegments() {
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Handler(Looper.getMainLooper()).postDelayed(this::checkForSegments, 100)
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if (segmentData == null || segmentData!!.segments.isEmpty()) return
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segmentData!!.segments.forEach { segment: Segment ->
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val segmentStart = (segment.segment!![0] * 1000f).toLong()
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val segmentEnd = (segment.segment[1] * 1000f).toLong()
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val currentPosition = player?.currentPosition
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if (currentPosition in segmentStart until segmentEnd) {
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if (PreferenceHelper.getBoolean(
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"sb_notifications_key",
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true
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)
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) {
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try {
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Toast.makeText(this, R.string.segment_skipped, Toast.LENGTH_SHORT)
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.show()
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} catch (e: Exception) {
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// Do nothing.
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}
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}
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player?.seekTo(segmentEnd)
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}
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}
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}
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/**
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* destroy the [BackgroundMode] foreground service
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*/
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override fun onDestroy() {
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// called when the user pressed stop in the notification
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// stop the service from being in the foreground and remove the notification
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stopForeground(true)
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// destroy the service
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stopSelf()
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if (this::nowPlayingNotification.isInitialized) nowPlayingNotification.destroy()
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super.onDestroy()
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}
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override fun onBind(p0: Intent?): IBinder? {
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return null
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}
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}
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