mirror of
https://github.com/libre-tube/LibreTube.git
synced 2024-12-15 23:00:31 +05:30
423 lines
13 KiB
Kotlin
423 lines
13 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.Binder
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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 androidx.core.app.ServiceCompat
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import com.fasterxml.jackson.databind.ObjectMapper
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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.api.obj.Segment
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import com.github.libretube.api.obj.SegmentData
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import com.github.libretube.api.obj.Streams
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import com.github.libretube.constants.BACKGROUND_CHANNEL_ID
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import com.github.libretube.constants.IntentData
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import com.github.libretube.constants.PLAYER_NOTIFICATION_ID
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import com.github.libretube.constants.PreferenceKeys
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import com.github.libretube.db.DatabaseHolder.Companion.Database
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import com.github.libretube.db.obj.WatchPosition
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import com.github.libretube.extensions.awaitQuery
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import com.github.libretube.extensions.query
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import com.github.libretube.extensions.toID
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import com.github.libretube.extensions.toStreamItem
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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.PlayingQueue
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import com.github.libretube.util.PreferenceHelper
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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.PlaybackException
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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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/**
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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/ChannelId for autoplay
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*/
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private var playlistId: String? = null
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private var channelId: 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: SegmentData? = 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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* Autoplay Preference
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*/
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private val handler = Handler(Looper.getMainLooper())
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/**
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* Used for connecting to the AudioPlayerFragment
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*/
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private val binder = LocalBinder()
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/**
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* Listener for passing playback state changes to the AudioPlayerFragment
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*/
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var onIsPlayingChanged: ((isPlaying: Boolean) -> Unit)? = null
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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 >= Build.VERSION_CODES.O) {
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val channel = NotificationChannel(
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BACKGROUND_CHANNEL_ID,
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getString(R.string.background_mode),
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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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// see https://developer.android.com/reference/android/app/Service#startForeground(int,%20android.app.Notification)
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val notification: Notification = Notification.Builder(this, BACKGROUND_CHANNEL_ID)
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.setContentTitle(getString(R.string.app_name))
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.setContentText(getString(R.string.playingOnBackground))
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.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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PlayingQueue.resetToDefaults()
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// get the intent arguments
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videoId = intent?.getStringExtra(IntentData.videoId)!!
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playlistId = intent.getStringExtra(IntentData.playlistId)
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val position = intent.getLongExtra(IntentData.position, 0L)
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// play the audio in the background
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loadAudio(videoId, position)
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PlayingQueue.setOnQueueTapListener { streamItem ->
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streamItem.url?.toID()?.let { playNextVideo(it) }
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}
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if (PlayerHelper.watchPositionsEnabled) updateWatchPosition()
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} catch (e: Exception) {
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onDestroy()
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}
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return super.onStartCommand(intent, flags, startId)
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}
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private fun updateWatchPosition() {
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player?.currentPosition?.let {
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val watchPosition = WatchPosition(videoId, it)
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// indicator that a new video is getting loaded
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this.streams ?: return@let
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query {
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Database.watchPositionDao().insertAll(watchPosition)
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}
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}
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handler.postDelayed(this::updateWatchPosition, 500)
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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 loadAudio(
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videoId: String,
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seekToPosition: Long = 0
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) {
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CoroutineScope(Dispatchers.IO).launch {
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streams = runCatching {
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RetrofitInstance.api.getStreams(videoId)
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}.getOrNull() ?: return@launch
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// add the playlist video to the queue
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if (PlayingQueue.isEmpty() && playlistId != null) {
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streams?.toStreamItem(videoId)?.let {
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PlayingQueue.insertPlaylist(playlistId!!, it)
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}
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} else if (PlayingQueue.isEmpty() && channelId != null) {
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streams?.toStreamItem(videoId)?.let {
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PlayingQueue.insertChannel(channelId!!, it)
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}
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} else {
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streams?.toStreamItem(videoId)?.let {
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PlayingQueue.updateCurrent(it)
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}
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streams?.relatedStreams?.toTypedArray()?.let {
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if (PlayerHelper.autoInsertRelatedVideos) PlayingQueue.add(*it)
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}
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}
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handler.post {
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playAudio(seekToPosition)
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}
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}
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}
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private fun playAudio(
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seekToPosition: Long
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) {
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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!!, true)
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}
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nowPlayingNotification.updatePlayerNotification(videoId, 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) {
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player?.seekTo(seekToPosition)
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} else if (PlayerHelper.watchPositionsEnabled) {
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runCatching {
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val watchPosition = awaitQuery {
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Database.watchPositionDao().findById(videoId)
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}
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streams?.duration?.let {
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if (watchPosition != null && watchPosition.position < it * 1000 * 0.9) {
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player?.seekTo(watchPosition.position)
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}
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}
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}
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}
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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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}
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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.AUDIO_CONTENT_TYPE_MUSIC)
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.build()
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player = ExoPlayer.Builder(this)
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.setHandleAudioBecomingNoisy(true)
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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 onIsPlayingChanged(isPlaying: Boolean) {
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super.onIsPlayingChanged(isPlaying)
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onIsPlayingChanged?.invoke(isPlaying)
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}
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override fun onPlaybackStateChanged(state: Int) {
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when (state) {
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Player.STATE_ENDED -> {
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if (PlayerHelper.autoPlayEnabled) 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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Player.STATE_BUFFERING -> {}
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Player.STATE_READY -> {}
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}
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}
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override fun onPlayerError(error: PlaybackException) {
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// show a toast on errors
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Handler(Looper.getMainLooper()).post {
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Toast.makeText(
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this@BackgroundMode.applicationContext,
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error.localizedMessage,
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Toast.LENGTH_SHORT
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).show()
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}
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}
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})
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}
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/**
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* Plays the next video from the queue
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*/
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private fun playNextVideo(nextId: String? = null) {
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val nextVideo = nextId ?: PlayingQueue.getNext() ?: return
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// play new video on background
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this.videoId = nextVideo
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this.streams = null
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this.segmentData = null
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loadAudio(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 ?: return
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val uri = if (streams!!.audioStreams.orEmpty().isNotEmpty()) {
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PlayerHelper.getAudioSource(
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this,
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streams!!.audioStreams!!
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)
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} else if (streams!!.hls != null) {
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streams!!.hls
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} else {
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return
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}
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val mediaItem = MediaItem.Builder()
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.setUri(uri)
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.build()
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player?.setMediaItem(mediaItem)
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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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runCatching {
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val categories = PlayerHelper.getSponsorBlockCategories()
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if (categories.isEmpty()) return@runCatching
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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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* 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 (PlayerHelper.sponsorBlockNotifications) {
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runCatching {
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Toast.makeText(this, R.string.segment_skipped, Toast.LENGTH_SHORT)
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.show()
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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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* Stop the service when app is removed from the task manager.
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*/
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override fun onTaskRemoved(rootIntent: Intent?) {
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super.onTaskRemoved(rootIntent)
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onDestroy()
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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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// clear the playing queue
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PlayingQueue.resetToDefaults()
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if (this::nowPlayingNotification.isInitialized) nowPlayingNotification.destroySelfAndPlayer()
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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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ServiceCompat.stopForeground(this, ServiceCompat.STOP_FOREGROUND_REMOVE)
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// destroy the service
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stopSelf()
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super.onDestroy()
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}
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inner class LocalBinder : Binder() {
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// Return this instance of [BackgroundMode] so clients can call public methods
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fun getService(): BackgroundMode = this@BackgroundMode
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}
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override fun onBind(p0: Intent?): IBinder {
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return binder
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}
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fun getCurrentPosition() = player?.currentPosition
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fun getDuration() = player?.duration
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fun seekToPosition(position: Long) = player?.seekTo(position)
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fun pause() {
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player?.pause()
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}
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fun play() {
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player?.play()
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}
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}
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