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Jetpack Media3۽ જ਷ ௑బஎ ࣗ࠺ ҃೷ ҳഅೞӝ ܨӝ޹ (workspace)

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઱ઁܳ ࢶ੿ೠ ੉ਬ

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য়ט ೣԋ ঌইࠅ Ѫ਷? ❏ झ౟ܻ߁ ѐۿ ❏ ExoPlayer (feat. v1ࠗఠ ॵ ࢎۈ੄ ҃೷) ❏ Media3 🎉

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झ౟ܻ߁ ѐۿ

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ই઱ ݢ ঢ়զ… ❏ ஹೊఠ۽ ৔࢚ ࠁӝ द੘ೠ ୐ ӝর ਷ 2000֙ ઺റ߈ࠗఠ ❏ Ӓ۞ա ೦࢚ ޙઁܳ ѻѱ غחؘ…

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׼द੄ झ౟ܻ߁ ❏ ૑Әࠁ׮ ࢚؀੸ਵ۽ ࠗ઒ೠ ੋ೐ۄ ❏ झ౟ܻ߁ਊ ೐۽ష௒x, ౵ੌਸ ా૩۽ ׮਍۽٘ ߉ ই ੤ࢤ. ❏ (ૐѢ) ਋௿ܼ റ ׮਍۽٘ ؽ or 1%ۄب উ߉ই ૑ݶ ੤ࢤ উغѢա ӵ૗ ❏ ӒѪਸ nݺ੉…

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ݽ߄ੌ द੢җ ೣԋ झ౟ܻ߁ ࣻਃ 📈

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2012-2014 োр ݽ߄ੌ ӝӝ / ࢎਊ੗ ࣻ 0 0.45 0.9 1.35 1.8 2012 2013 2014 క࠶݁ ୹ೞ۝ झ݃౟ಪ ୹ೞ۝ झ݃౟ಪ ࢎਊ੗ ࣻ ୹୊: Gartner (Mar 2014), IDC (Jan 2014), eMarketer (Dec 2013)

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2012-2014 োр ݽ߄ੌ ӝӝ / ࢎਊ੗ ࣻ 0 0.45 0.9 1.35 1.8 2012 2013 2014 క࠶݁ ୹ೞ۝ झ݃౟ಪ ୹ೞ۝ झ݃౟ಪ ࢎਊ੗ ࣻ ୹୊: Gartner (Mar 2014), IDC (Jan 2014), eMarketer (Dec 2013) झ౟ܻ߁ਸ ਤೠ Ҵઁ ಴ળ ӝࣿ੄ ١੢

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DASH ❏ Dynamic Adaptive Streaming over HTTP ❏ ׮নೠ ೧࢚ب৬ ࠺౟ۨ੉౟۽ video streamਸ ੋ௏٬ ❏ ૑োਸ ୭ࣗചೞҊ, উ੿੸ੋ Ҋಿ૕ द୒ ജ҃ਸ ઁҕ ❏ ޷٣যী ؀ೠ ݺࣁ - Dash Manifest(mpd) ❏ ఋ ೐۽ష௒ : HLS(Apple), Smooth Streaming(Microsoft)

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DASH - ૑ো হח द੘ 1080p 360p 720p 144p audio 👍

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DASH - উ੿੸ੋ झ౟ܻ߁ 1080p 360p 720p 144p audio 🚇

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DASH - ؊ࡂ਷ যڌѱ ઁҕؼө? 1080p 360p 720p 144p audio🇰🇷 audio🇺🇸

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DASH - XXX Music਷ যڌѱ? 1080p 360p 720p 144p audio

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ExoPlayer੄ ١੢

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ExoPlayer ❏ উ٘۽੉٘ܳ ਤೠ ޷٣য ੤ࢤ ۄ੉࠳۞ܻ ❏ 2014 Google I/Oীࢲ ١੢ ❏ DASH, Smooth Streaming١ ࢜۽਍ ಴ળ ૑ਗ ❏ frameworkױ੄ ۽૒ਸ applicationױীࢲ ࣻ ੿ೡ ࣻ ੓ب۾ ೞৈ ਬোೞѱ ഛ੢ 🔗 https://youtu.be/92fgcUNCHic?t=1108

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ExoPlayerо ઁҕೞח Ѫ Extension cast, media session, media2 (androidx) cronet, okhttp, rtmp (data source) AV1, VP9, FLAC, Opus (decoder) FFMpeg (renderer) Library core dash, hls, smoothstreaming ui

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աীѱ ExoPlayerۆ? ❏ ੉गо ցޖ ݆ও਺😇 ❏ ୊਺ਵ۽ ֤੄ী ଵৈ೧ࠄ য়೑ࣗझ ❏ ׮਍۽٘ ࣘب ೱ࢚, DRM ੤ࢤ ߡߢ ੐, ߓࣘ ١ ޙઁ ೧Ѿী р੽ ӝৈ ❏ ࣘبח וܻ૑݅ Բળ൤ ޙઁ ೧Ѿ👍

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Media3, why?

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рױೠ ೒ۨ੉য ҳഅ Player UI commands state

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рױೠ ೒ۨ੉য ҳഅ Player UI commands state

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Media Session ҳഅਵ۽ ঳য૑ח Ѫٜ Player UI Media Session

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যڃ ۄ੉࠳۞ܻܳ ࢎਊ೧ঠ ೞחо? Player UI Media Session ❏ Jetpack Media(MediaCompat), ❏ Media2 ❏ ExoPlayer п੗ ݾ੸੉ ੓Ҋ, Ҁ஖ח ҳഅب ࢚׼ೠ ׮নೠ Media apiо ઓ੤.

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যڃ ۄ੉࠳۞ܻܳ ࢎਊ೧ঠ ೞחо? UI Player Media Session ❏ Jetpack Media(MediaCompat), ❏ Media2 ❏ ExoPlayer

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যڃ ۄ੉࠳۞ܻܳ ࢎਊ೧ঠ ೞחо? Player UI Media Session ❏ Jetpack Media(MediaCompat), ❏ Media2 ❏ ExoPlayer

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যڃ ۄ੉࠳۞ܻܳ ࢎਊ೧ঠ ೞחо? Player UI Media Session ❏ Jetpack Media(MediaCompat), ❏ Media2 ❏ ExoPlayer Ӓ ߆ীب ৈ۞о૑ য۰਑੉…

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যڃ ۄ੉࠳۞ܻܳ ࢎਊ೧ঠ ೞחо? Player UI Media Session ❏ Jetpack Media(MediaCompat), ❏ Media2 ❏ ExoPlayer Media3 👍

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Foreground Playback Activity Player UI Media Session

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Foreground Playback (previous api) Activity Player UI Media Session androidx.media ExoPlayer ExoPlayer

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Foreground Playback (previous api) Activity Player UI Media Session androidx.media ExoPlayer ExoPlayer Connector

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https://github.com/google/ExoPlayer/blob/release-v2/extensions/mediasession/src/main/java/com/ google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java package com.google.android.exoplayer2.ext.mediasession; public final class MediaSessionConnector { // media session command -> player @Override public void onPlay(…) { // … player.play(); } // player callback -> media session @Override public void onPlaybackStateChanged(…) { // … mediaSession.setState(newState); } }

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https://github.com/google/ExoPlayer/blob/release-v2/extensions/mediasession/src/main/java/com/ google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java package com.google.android.exoplayer2.ext.mediasession; public final class MediaSessionConnector { // media session command -> player @Override public void onPlay(…) { // … player.play(); } // player callback -> media session @Override public void onPlaybackStateChanged(…) { // … mediaSession.setState(newState); } }

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https://github.com/google/ExoPlayer/blob/release-v2/extensions/mediasession/src/main/java/com/ google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java package com.google.android.exoplayer2.ext.mediasession; public final class MediaSessionConnector { // media session command -> player @Override public void onPlay(…) { // … player.play(); } // player callback -> media session @Override public void onPlaybackStateChanged(…) { // … mediaSession.setState(newState); } }

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Foreground Playback (media3) Activity Player UI Media Session

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Foreground Playback (media3) Activity Player UI Media Session // androidx.media3.common interface Player { … }

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Foreground Playback (media3) Activity ExoPlayer UI Media Session // androidx.media3.common interface Player { … } Implements Player Takes Player Takes Player Connector ೙ਃ হ਺!

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// Initialize ExoPlayer as an implementation of Player interface val player = ExoPlayer.Builder(context).build()

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// Initialize ExoPlayer as an implementation of Player interface val player = ExoPlayer.Builder(context).build() // Takes the Player instance to initialize MediaSession val mediaSession = MediaSession.Builder(context, player).build()

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// Initialize ExoPlayer as an implementation of Player interface val player = ExoPlayer.Builder(context).build() // Takes the Player instance to initialize MediaSession val mediaSession = MediaSession.Builder(context, player).build() // Takes the Player instance to configure UI playerView.player = player

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Background Playback Service Player Activity UI

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Background Playback (previous api) Service Media Session Player Activity UI Media Controller

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Background Playback (previous api) Service Media Session Player Activity UI Media Controller androidx.media ExoPlayer ExoPlayer androidx.media

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Background Playback (previous api) Service Media Session Player Activity UI Media Controller androidx.media ExoPlayer ExoPlayer androidx.media Connector Connector

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Background Playback (media3) Service Media Session Player Activity UI Media Controller

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Background Playback (media3) Service Media Session ExoPlayer Activity UI Media Controller Implements Player Takes Player Takes Player Implements Player

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// PlayerService // 1. Initialize ExoPlayer as an implementation of the Player interface val player = ExoPlayer.Builder(context).build()

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// PlayerService // 1. Initialize ExoPlayer as an implementation of the Player interface val player = ExoPlayer.Builder(context).build() // 2. Takes the Player instance to initialize the MediaSession val mediaSession = MediaSession.Builder(context, player).build()

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// PlayerService // 1. Initialize ExoPlayer as an implementation of the Player interface val player = ExoPlayer.Builder(context).build() // 2. Takes the Player instance to initialize the MediaSession val mediaSession = MediaSession.Builder(context, player).build() // PlayerActivity // 1. Create a session token to identify session. val sessionToken = SessionToken(context, ComponentName(context, PlayerService::class.java))

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// PlayerService // 1. Initialize ExoPlayer as an implementation of the Player interface val player = ExoPlayer.Builder(context).build() // 2. Takes the Player instance to initialize the MediaSession val mediaSession = MediaSession.Builder(context, player).build() // PlayerActivity // 1. Create a session token to identify session. val sessionToken = SessionToken(context, ComponentName(context, PlayerService::class.java)) // 2. Build mediaController which connects to the session asynchronously. val mediaControllerFuture = MediaController .Builder(context, sessionToken) .buildAsync()

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// PlayerService // 1. Initialize ExoPlayer as an implementation of the Player interface val player = ExoPlayer.Builder(context).build() // 2. Takes the Player instance to initialize the MediaSession val mediaSession = MediaSession.Builder(context, player).build() // PlayerActivity // 1. Create a session token to identify session. val sessionToken = SessionToken(context, ComponentName(context, PlayerService::class.java)) // 2. Build mediaController which connects to the session asynchronously. val mediaControllerFuture = MediaController .Builder(context, sessionToken) .buildAsync() // 3. Takes the Player instance to configure UI mediaControllerFuture.addListener( { playerView.setPlayer(player = mediaControllerFuture.get())}, MoreExecutors.directExecutor() )

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Working with other apps MediaBrowserService ❏ Exposing media session ❏ Exposing content library

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Working with other apps MediaBrowserService ❏ Exposing media session ❏ Exposing content library MediaSessionService ❏ Exposing media session

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Working with other apps MediaBrowserService ❏ Exposing media session ❏ Exposing content library MediaSessionService MediaLibraryService ❏ Exposing media session ❏ Exposing content library

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Exposing media session

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Exposing content library

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٘۽੉٘ա੉எ জ + media3

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TODO ❏ Video ҙ۲ model ࣻ੿ ❏ SessionDetailScreenী video ਬޖী ٮܲ ೒ۨ੉য ૓ੑ੼ ઁҕ ❏ ޷٣য ੤ࢤ ҳഅ (PlayerScreen, PlaybackService)

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core:playback ❏ PlaybackState ❏ PlaybackStateManager ❏ PlaybackStateListener ❏ PlaybackService ❏ PlayerController

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data class PlaybackState( val isPlaying: Boolean = false, val hasPrevious: Boolean = false, val hasNext: Boolean = false, val position: Long = C.TIME_UNSET, val duration: Long = C.TIME_UNSET, val speed: Float = 1F, val aspectRatio: Float = 16F / 9F, val title: String? = null, val artist: String? = null, val artworkUri: Uri? = null, )

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@Singleton class PlaybackStateManager @Inject constructor() { private val _playbackState = MutableStateFlow(PlaybackState()) val flow: StateFlow get() = _playbackState var playbackState: PlaybackState set(value) { _playbackState.value = value } get() = _playbackState.value }

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internal class PlaybackStateListener @Inject constructor(…) : Player.Listener { private lateinit var player: Player override fun onPlaybackStateChanged(…) { updatePlayState() } override fun onPlayWhenReadyChanged(…) { … } override fun onPositionDiscontinuity(…) { … } override fun onIsPlayingChanged(…) { … } override fun onPlaybackParametersChanged(…) { … } override fun onVideoSizeChanged(…) { … } }

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internal class PlaybackStateListener @Inject constructor(…) : Player.Listener { // … private fun updatePlayState() { val playbackState = player.playbackState playbackStateManager.playbackState = PlaybackState( isPlaying = when { playbackState == Player.STATE_ENDED || playbackState == Player.STATE_IDLE -> false player.playWhenReady -> true else -> false }, hasPrevious = player.hasPreviousMediaItem(), hasNext = player.hasNextMediaItem(), position = player.contentPosition, duration = player.duration, speed = player.playbackParameters.speed, aspectRatio = …, title = …, artist = …, artworkUri = … ) } }

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internal class PlaybackStateListener @Inject constructor(…) : Player.Listener { private lateinit var player: Player fun attachTo(player: Player) { this.player = player player.addListener(this) scope.launch { playbackStateManager.flow .map { it.isPlaying } .collectLatest { isPlaying -> if (isPlaying) { while (true) { updatePlayState() delay(400.milliseconds) } } } } } }

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@AndroidEntryPoint class PlaybackService : MediaLibraryService() { @Inject lateinit var session: MediaLibrarySession …… override fun onGetSession( controllerInfo: MediaSession.ControllerInfo ): MediaLibrarySession? { … } }

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class PlayerController @Inject constructor(…) { … fun play() = executeAfterPrepare { controller -> controller.play() } fun playPause() = executeAfterPrepare { controller -> if (controller.isPlaying) { controller.pause() } else { controller.play() } } fun setPosition(positionMs: Long) = executeAfterPrepare { controller -> controller.seekTo(positionMs) } fun fastForward() = executeAfterPrepare { controller -> controller.seekForward() } fun rewind() = executeAfterPrepare { controller -> controller.seekBack() } fun previous() = executeAfterPrepare { controller -> controller.seekToPrevious() } fun next() = executeAfterPrepare { controller -> controller.seekToNext() } … }

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feature:player ❏ PlayerView ❏ PlayerScreen ❏ PlayerViewModel

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@Composable fun PlayerView( modifier: Modifier = Modifier ) { var player: Player? by remember { mutableStateOf(null) } var surfaceView: SurfaceView? by remember { mutableStateOf(null) } }

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@Composable fun PlayerView( modifier: Modifier = Modifier ) { var player: Player? by remember { mutableStateOf(null) } var surfaceView: SurfaceView? by remember { mutableStateOf(null) } AndroidView( factory = { SurfaceView(it).apply { surfaceView = this } }, modifier = modifier ) }

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@Composable fun PlayerView( modifier: Modifier = Modifier ) { val context = LocalContext.current var player: Player? by remember { mutableStateOf(null) } var surfaceView: SurfaceView? by remember { mutableStateOf(null) } LaunchedEffect(Unit) { player = MediaController .Builder( context, SessionToken(context, ComponentName(context, PlaybackService::class.java)) ) .buildAsync() .await() } AndroidView( factory = { SurfaceView(it).apply { surfaceView = this } }, modifier = modifier ) }

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@Composable fun PlayerView( modifier: Modifier = Modifier ) { val context = LocalContext.current var player: Player? by remember { mutableStateOf(null) } var surfaceView: SurfaceView? by remember { mutableStateOf(null) } LaunchedEffect(Unit) { player = MediaController .Builder( context, SessionToken(context, ComponentName(context, PlaybackService::class.java)) ) .buildAsync() .await() } DisposableEffect(player, surfaceView) { if (player?.isCommandAvailable(Player.COMMAND_SET_VIDEO_SURFACE) == true) { player?.setVideoSurfaceView(surfaceView) } onDispose { if (player?.isCommandAvailable(Player.COMMAND_SET_VIDEO_SURFACE) == true) { player?.clearVideoSurfaceView(surfaceView) } } } AndroidView( factory = { SurfaceView(it).apply { surfaceView = this } }, modifier = modifier ) }

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sealed interface PlayerUiState { object Loading : PlayerUiState data class Success( val isPlaying: Boolean, val hasPrevious: Boolean, val hasNext: Boolean, val position: Long, val duration: Long, val speed: Float, val aspectRatio: Float ) : PlayerUiState }

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@HiltViewModel class PlayerViewModel @Inject constructor( … private val playbackStateManager: PlaybackStateManager, … ) : ViewModel() { private val _playerUiState = MutableStateFlow(PlayerUiState.Loading) val playerUiState: StateFlow = _playerUiState init { … viewModelScope.launch { playbackStateManager.flow.collect { _playerUiState.value = PlayerUiState.Success( it.isPlaying, it.hasPrevious, it.hasNext, it.position, it.duration, it.speed, it.aspectRatio ) } } } }

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sealed interface PlayerUiState { object Loading : PlayerUiState data class Success( val isPlaying: Boolean, val hasPrevious: Boolean, val hasNext: Boolean, val position: Long, val duration: Long, val speed: Float, val aspectRatio: Float ) : PlayerUiState }

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sealed interface PlayerUiState { object Loading : PlayerUiState data class Success( val isPlaying: Boolean, val hasPrevious: Boolean, val hasNext: Boolean, val position: Long, val duration: Long, val speed: Float, val aspectRatio: Float ) : PlayerUiState }

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sealed interface PlayerUiState { object Loading : PlayerUiState data class Success( val isPlaying: Boolean, val hasPrevious: Boolean, val hasNext: Boolean, val position: Long, val duration: Long, val speed: Float, val aspectRatio: Float ) : PlayerUiState }

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sealed interface PlayerUiState { object Loading : PlayerUiState data class Success( val isPlaying: Boolean, val hasPrevious: Boolean, val hasNext: Boolean, val position: Long, val duration: Long, val speed: Float, val aspectRatio: Float ) : PlayerUiState }

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sealed interface PlayerUiState { object Loading : PlayerUiState data class Success( val isPlaying: Boolean, val hasPrevious: Boolean, val hasNext: Boolean, val position: Long, val duration: Long, val speed: Float, val aspectRatio: Float ) : PlayerUiState }

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sealed interface PlayerUiState { object Loading : PlayerUiState data class Success( val isPlaying: Boolean, val hasPrevious: Boolean, val hasNext: Boolean, val position: Long, val duration: Long, val speed: Float, val aspectRatio: Float ) : PlayerUiState } PlayerView

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@HiltViewModel class PlayerViewModel @Inject constructor( … private val playerController: PlayerController, ) : ViewModel() { … fun playPause() { playerController.playPause() } fun prev() { playerController.previous() } fun next() { playerController.next() } fun setPosition(position: Long) { playerController.setPosition(position) } }

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@HiltViewModel class PlayerViewModel @Inject constructor( … private val playerController: PlayerController, ) : ViewModel() { … fun playPause() { playerController.playPause() } fun prev() { playerController.previous() } fun next() { playerController.next() } fun setPosition(position: Long) { playerController.setPosition(position) } }

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@HiltViewModel class PlayerViewModel @Inject constructor( … private val playerController: PlayerController, ) : ViewModel() { … fun playPause() { playerController.playPause() } fun prev() { playerController.previous() } fun next() { playerController.next() } fun setPosition(position: Long) { playerController.setPosition(position) } }

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@HiltViewModel class PlayerViewModel @Inject constructor( … private val playerController: PlayerController, ) : ViewModel() { … fun playPause() { playerController.playPause() } fun prev() { playerController.previous() } fun next() { playerController.next() } fun setPosition(position: Long) { playerController.setPosition(position) } }

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ӝࠄ ೒ۨ੉য ঌܿ ઁҕ

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Media Key event ୊ܻ

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োѾػ ٣߄੉झীࢲ ޷٣য ஶ౟܀۞ ઁҕ

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MediaLibraryService - Android Auto ૑ਗ (1)

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MediaLibraryService - Android Auto ૑ਗ (2) Root Keynote Keynote Dev Environment Architecture Session Session Session Session Track 01 Session Session

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MediaLibraryService - Android Auto ૑ਗ (3)

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core:playback module੄ ੤ഝਊ ❏ Wear OS জ ❏ TV জ ❏ Automotive জ ਤ 3о૑ জ… ߈ա੺݅ী ׮ ٜ݅ ࣻ ੓঻਺😎

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DroidKnights 2023 app for wear os feature:wear-session feature:wear-player

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DroidKnights 2023 app for tv feature:tv-session

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DroidKnights 2023 app for tv feature:playerח ੤ഝਊ😁

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DroidKnights 2023 app for tv : Now Playing

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DroidKnights 2023 app for automotive ❏ Launcher Activity হ੉ MediaBrowerService݅ ઁҕ೧ب ؽ

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DroidKnights 2023 app for automotive

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DroidKnights 2023 app for automotive

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ਃড

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ਃড ❏ Media3 ۄ੉࠳۞ܻח ӝઓ ۄ੉࠳۞ܻܳ ݽف ా೤! ❏ ࢎਊ੗ ҃೷ਸ ਤ೧ MediaSession੉ ઺ਃ ❏ Media*Service ҳഅਸ ా೧ ߔӒۄ਍٘ ੤ࢤ, ӝࠄ ঌܿ ઁҕ, ޷٣য ۄ੉࠳ ۞ܻ ઁҕਸ औѱ ೡ ࣻ ੓਺. ❏ ੤ࢤ ҳഅ ݽٕਸ ੤ഝਊೞৈ wear os, tv, auto ޷٣য জਸ औѱ ѐߊ

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݃૑݄ਵ۽ ઱੄੼ (1) ❏ ޙࢲ/೐۽ં౟ మ೒݁਷ ই૒ ߈৔ উؽ… ex) media3۽ Android Autoܳ ૑ਗೞ۰ݶ? old ޙࢲ / template Android Autoܳ ૑ਗೞ۰ݶ MediaBrowserServiceCompatਸ ҳഅ೧ঠೠ׮. new ޙࢲ media3 MediaLibraryServiceח legacy media API৬ ഐജػ׮.

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Resource Google I/O 2014 - Building great multi-media experiences on Android (18:29 ~) Introducing Jetpack Media3 Media3 is ready to play! Introduction to Jetpack Media3 Media3 Github Android Dev Summit 2021 - What’s next for AndroidX Media and ExoPlayer DroidKnight2023 App Github (reference-media3 branch) Using Jetpack Compose on Wear OS Use Jetpack Compose on Android TV Build media apps for cars ⌚ 📺 🚗

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хࢎ೤פ׮.