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MediaPlayerHolder.kt
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MediaPlayerHolder.kt
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package com.iven.musicplayergo.player
import android.app.Activity
import android.bluetooth.BluetoothDevice
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Context.AUDIO_SERVICE
import android.content.Intent
import android.content.IntentFilter
import android.media.AudioAttributes
import android.media.AudioFocusRequest
import android.media.AudioManager
import android.media.MediaPlayer
import android.os.Handler
import android.os.PowerManager
import android.support.v4.media.MediaMetadataCompat
import android.support.v4.media.session.PlaybackStateCompat.*
import com.iven.musicplayergo.GoConstants
import com.iven.musicplayergo.R
import com.iven.musicplayergo.extensions.toContentUri
import com.iven.musicplayergo.extensions.toToast
import com.iven.musicplayergo.goPreferences
import com.iven.musicplayergo.helpers.VersioningHelper
import com.iven.musicplayergo.models.Music
import com.iven.musicplayergo.ui.MainActivity
import java.util.concurrent.Executors
import java.util.concurrent.ScheduledExecutorService
import java.util.concurrent.TimeUnit
import kotlin.math.ln
/**
* Exposes the functionality of the [MediaPlayer]
*/
// The volume we set the media player to when we lose audio focus, but are
// allowed to reduce the volume instead of stopping playback.
private const val VOLUME_DUCK = 0.2f
// The volume we set the media player when we have audio focus.
private const val VOLUME_NORMAL = 1.0f
// We don't have audio focus, and can't duck (play at a low volume)
private const val AUDIO_NO_FOCUS_NO_DUCK = 0
// We don't have focus, but can duck (play at a low volume)
private const val AUDIO_NO_FOCUS_CAN_DUCK = 1
// We have full audio focus
private const val AUDIO_FOCUSED = 2
// The headset connection states (0,1)
private const val HEADSET_DISCONNECTED = 0
private const val HEADSET_CONNECTED = 1
class MediaPlayerHolder(private val playerService: PlayerService) :
MediaPlayer.OnCompletionListener,
MediaPlayer.OnPreparedListener {
private val mStateBuilder =
Builder().apply {
if (VersioningHelper.isQ()) setActions(ACTION_SEEK_TO)
}
lateinit var mediaPlayerInterface: MediaPlayerInterface
// Audio focus
private var mAudioManager = playerService.getSystemService(AUDIO_SERVICE) as AudioManager
private lateinit var mAudioFocusRequestOreo: AudioFocusRequest
private val mHandler = Handler()
private var mCurrentAudioFocusState = AUDIO_NO_FOCUS_NO_DUCK
private var sPlayOnFocusGain = false
private val mOnAudioFocusChangeListener =
AudioManager.OnAudioFocusChangeListener { focusChange ->
when (focusChange) {
AudioManager.AUDIOFOCUS_GAIN -> mCurrentAudioFocusState = AUDIO_FOCUSED
AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK ->
// Audio focus was lost, but it's possible to duck (i.e.: play quietly)
mCurrentAudioFocusState = AUDIO_NO_FOCUS_CAN_DUCK
AudioManager.AUDIOFOCUS_LOSS_TRANSIENT -> {
// Lost audio focus, but will gain it back (shortly), so note whether
// playback should resume
mCurrentAudioFocusState = AUDIO_NO_FOCUS_NO_DUCK
sPlayOnFocusGain =
isMediaPlayer && state == GoConstants.PLAYING || state == GoConstants.RESUMED
}
AudioManager.AUDIOFOCUS_LOSS ->
// Lost audio focus, probably "permanently"
mCurrentAudioFocusState = AUDIO_NO_FOCUS_NO_DUCK
}
// Update the player state based on the change
if (isMediaPlayer) configurePlayerState()
}
// Media player
private lateinit var mediaPlayer: MediaPlayer
private var mExecutor: ScheduledExecutorService? = null
private var mSeekBarPositionUpdateTask: Runnable? = null
// First: current song, second: isFromQueue
lateinit var currentSong: Pair<Music?, Boolean>
var isPlayingFromFolder = false
private var isPlayingFromFolderPreQueue = false
private var mPlayingAlbumSongs: List<Music>? = null
var currentVolumeInPercent = goPreferences.latestVolume
val playerPosition get() = if (!isMediaPlayer) goPreferences.latestPlayedSong?.startFrom!! else mediaPlayer.currentPosition
// Media player state/booleans
val isPlaying get() = isMediaPlayer && mediaPlayer.isPlaying
val isMediaPlayer get() = ::mediaPlayer.isInitialized
private var sNotificationForeground = false
val isCurrentSong get() = ::currentSong.isInitialized
var isRepeat1X = false
var isLoop = false
var isQueue = false
var isQueueStarted = false
private lateinit var preQueueSong: Pair<Music?, List<Music>?>
var queueSongs = mutableListOf<Music>()
var isSongRestoredFromPrefs = false
var isSongFromLovedSongs = Pair(false, 0)
var state = GoConstants.PAUSED
var isPlay = false
// Notifications
private lateinit var mNotificationActionsReceiver: NotificationReceiver
private lateinit var mMusicNotificationManager: MusicNotificationManager
private fun startForeground() {
if (!sNotificationForeground) {
playerService.startForeground(
GoConstants.NOTIFICATION_ID,
mMusicNotificationManager.createNotification()
)
sNotificationForeground = true
} else {
mMusicNotificationManager.apply {
updateNotificationText()
updatePlayPauseAction()
updateRepeatIcon()
updateNotification()
}
}
}
fun registerActionsReceiver() {
mNotificationActionsReceiver = NotificationReceiver()
val intentFilter = IntentFilter().apply {
addAction(GoConstants.REPEAT_ACTION)
addAction(GoConstants.PREV_ACTION)
addAction(GoConstants.PLAY_PAUSE_ACTION)
addAction(GoConstants.NEXT_ACTION)
addAction(GoConstants.CLOSE_ACTION)
addAction(BluetoothDevice.ACTION_ACL_CONNECTED)
addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED)
addAction(Intent.ACTION_HEADSET_PLUG)
addAction(AudioManager.ACTION_AUDIO_BECOMING_NOISY)
}
playerService.registerReceiver(mNotificationActionsReceiver, intentFilter)
}
private fun unregisterActionsReceiver() {
try {
playerService.unregisterReceiver(mNotificationActionsReceiver)
} catch (e: IllegalArgumentException) {
e.printStackTrace()
}
}
fun setCurrentSong(
song: Music?,
songs: List<Music>?,
isFromQueue: Boolean,
isFolderAlbum: Boolean
) {
isPlayingFromFolder = isFolderAlbum
currentSong = Pair(song, isFromQueue)
mPlayingAlbumSongs = songs
}
private fun updateMediaSessionMetaData() {
val mediaMediaPlayerCompat = MediaMetadataCompat.Builder().apply {
putLong(MediaMetadataCompat.METADATA_KEY_DURATION, currentSong.first?.duration!!)
}
playerService.getMediaSession().setMetadata(mediaMediaPlayerCompat.build())
}
override fun onCompletion(mediaPlayer: MediaPlayer) {
mediaPlayerInterface.onStateChanged()
mediaPlayerInterface.onPlaybackCompleted()
when {
isRepeat1X or isLoop -> if (isMediaPlayer) repeatSong()
isQueue -> manageQueue(true)
else -> skip(true)
}
}
fun onRestartSeekBarCallback() {
if (mExecutor == null) startUpdatingCallbackWithPosition()
}
fun onPauseSeekBarCallback() {
stopUpdatingCallbackWithPosition()
}
fun tryToGetAudioFocus() {
mCurrentAudioFocusState = when (getAudioFocusResult()) {
AudioManager.AUDIOFOCUS_REQUEST_GRANTED -> AUDIO_FOCUSED
else -> AUDIO_NO_FOCUS_NO_DUCK
}
}
@Suppress("DEPRECATION")
private fun getAudioFocusResult() = when {
VersioningHelper.isOreoMR1() -> {
mAudioFocusRequestOreo =
AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN).run {
setAudioAttributes(AudioAttributes.Builder().run {
setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build()
})
setOnAudioFocusChangeListener(mOnAudioFocusChangeListener, mHandler)
build()
}
mAudioManager.requestAudioFocus(mAudioFocusRequestOreo)
}
else -> mAudioManager.requestAudioFocus(
mOnAudioFocusChangeListener,
AudioManager.STREAM_MUSIC,
AudioManager.AUDIOFOCUS_GAIN
)
}
@Suppress("DEPRECATION")
fun giveUpAudioFocus() {
when {
VersioningHelper.isOreo() -> if (::mAudioFocusRequestOreo.isInitialized) mAudioManager.abandonAudioFocusRequest(
mAudioFocusRequestOreo
)
else -> {
mAudioManager.abandonAudioFocus(mOnAudioFocusChangeListener)
mCurrentAudioFocusState = AUDIO_NO_FOCUS_NO_DUCK
}
}
}
private fun updatePlaybackStatus(updateUI: Boolean) {
playerService.getMediaSession().setPlaybackState(
mStateBuilder.setState(
if (state == GoConstants.RESUMED) GoConstants.PLAYING else state,
if (VersioningHelper.isQ()) mediaPlayer.currentPosition.toLong() else PLAYBACK_POSITION_UNKNOWN,
1F
).build()
)
if (updateUI) mediaPlayerInterface.onStateChanged()
}
fun resumeMediaPlayer() {
if (!isPlaying) {
if (isMediaPlayer) mediaPlayer.start()
state = if (isSongRestoredFromPrefs) {
isSongRestoredFromPrefs = false
GoConstants.PLAYING
} else {
GoConstants.RESUMED
}
updatePlaybackStatus(true)
startForeground()
if (!isPlay) isPlay = true
}
}
fun pauseMediaPlayer() {
mediaPlayer.pause()
playerService.stopForeground(false)
sNotificationForeground = false
state = GoConstants.PAUSED
updatePlaybackStatus(true)
mMusicNotificationManager.apply {
updatePlayPauseAction()
updateNotification()
}
}
fun repeatSong() {
isRepeat1X = false
mediaPlayer.setOnSeekCompleteListener { mp ->
mp.setOnSeekCompleteListener(null)
play()
}
mediaPlayer.seekTo(0)
}
private fun manageQueue(isNext: Boolean) {
if (isSongRestoredFromPrefs) isSongRestoredFromPrefs = false
when {
isQueueStarted -> currentSong = Pair(getSkipSong(isNext), true)
else -> {
setCurrentSong(queueSongs[0], queueSongs, isFromQueue = true, isFolderAlbum = false)
isQueueStarted = true
}
}
initMediaPlayer(currentSong.first)
}
fun restorePreQueueSongs() {
setCurrentSong(preQueueSong.first, preQueueSong.second, false, isPlayingFromFolderPreQueue)
}
private fun getSkipSong(isNext: Boolean): Music? {
val currentIndex = mPlayingAlbumSongs?.indexOf(currentSong.first)
try {
return mPlayingAlbumSongs?.get(
if (isNext) currentIndex?.plus(1)!! else currentIndex?.minus(
1
)!!
)
} catch (e: IndexOutOfBoundsException) {
e.printStackTrace()
return when {
isQueue -> {
when {
isNext -> {
setQueueEnabled(false)
restorePreQueueSongs()
getSkipSong(true)
}
else -> {
isQueueStarted = false
preQueueSong.first
}
}
}
else -> if (currentIndex != 0) mPlayingAlbumSongs?.get(0) else mPlayingAlbumSongs?.get(
mPlayingAlbumSongs?.size?.minus(1)!!
)
}
}
}
/**
* Syncs the mMediaPlayer position with mPlaybackProgressCallback via recurring task.
*/
private fun startUpdatingCallbackWithPosition() {
if (mSeekBarPositionUpdateTask == null) mSeekBarPositionUpdateTask =
Runnable { updateProgressCallbackTask() }
mExecutor = Executors.newSingleThreadScheduledExecutor()
mExecutor?.scheduleAtFixedRate(
mSeekBarPositionUpdateTask!!,
0,
1000,
TimeUnit.MILLISECONDS
)
}
// Reports media playback position to mPlaybackProgressCallback.
private fun stopUpdatingCallbackWithPosition() {
mExecutor?.shutdownNow()
mExecutor = null
mSeekBarPositionUpdateTask = null
}
private fun updateProgressCallbackTask() {
if (isPlaying) {
val currentPosition = mediaPlayer.currentPosition
mediaPlayerInterface.onPositionChanged(currentPosition)
}
}
fun instantReset() {
if (isMediaPlayer && !isSongRestoredFromPrefs) when {
mediaPlayer.currentPosition < 5000 -> skip(false)
else -> repeatSong()
} else skip(false)
}
/**
* Once the [MediaPlayer] is released, it can't be used again, and another one has to be
* created. In the onStop() method of the [MainActivity] the [MediaPlayer] is
* released. Then in the onStart() of the [MainActivity] a new [MediaPlayer]
* object has to be created. That's why this method is private, and called by load(int) and
* not the constructor.
*/
fun initMediaPlayer(song: Music?) {
try {
if (isMediaPlayer) {
mediaPlayer.reset()
} else {
mediaPlayer = MediaPlayer().apply {
EqualizerUtils.openAudioEffectSession(
playerService.applicationContext,
audioSessionId
)
setOnPreparedListener(this@MediaPlayerHolder)
setOnCompletionListener(this@MediaPlayerHolder)
setWakeMode(playerService, PowerManager.PARTIAL_WAKE_LOCK)
setAudioAttributes(
AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_MEDIA)
.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
.build()
)
}
mMusicNotificationManager = playerService.musicNotificationManager
if (goPreferences.isFocusEnabled) tryToGetAudioFocus()
if (goPreferences.isPreciseVolumeEnabled) setPreciseVolume(currentVolumeInPercent)
}
song?.id?.toContentUri()?.let { uri ->
mediaPlayer.setDataSource(playerService, uri)
}
mediaPlayer.prepareAsync()
} catch (e: Exception) {
e.printStackTrace()
}
}
override fun onPrepared(mediaPlayer: MediaPlayer) {
if (isRepeat1X) isRepeat1X = false
if (isSongRestoredFromPrefs) {
if (goPreferences.isPreciseVolumeEnabled) setPreciseVolume(currentVolumeInPercent)
mediaPlayer.seekTo(goPreferences.latestPlayedSong?.startFrom!!)
} else if (isSongFromLovedSongs.first) {
mediaPlayer.seekTo(isSongFromLovedSongs.second)
isSongFromLovedSongs = Pair(false, 0)
}
if (isQueue) mediaPlayerInterface.onQueueStartedOrEnded(isQueueStarted)
if (VersioningHelper.isQ()) updateMediaSessionMetaData()
if (mExecutor == null) startUpdatingCallbackWithPosition()
if (isPlay) play()
}
private fun play() {
mediaPlayer.start()
state = GoConstants.PLAYING
updatePlaybackStatus(true)
startForeground()
}
fun openEqualizer(activity: Activity) {
EqualizerUtils.openEqualizer(activity, mediaPlayer)
}
fun release() {
if (isMediaPlayer) {
EqualizerUtils.closeAudioEffectSession(
playerService,
mediaPlayer.audioSessionId
)
mediaPlayer.release()
if (goPreferences.isFocusEnabled) giveUpAudioFocus()
stopUpdatingCallbackWithPosition()
}
unregisterActionsReceiver()
}
fun resumeOrPause() {
if (isPlaying) pauseMediaPlayer() else resumeMediaPlayer()
}
private fun getRepeatMode() {
var toastMessage = R.string.repeat_enabled
when {
isRepeat1X -> {
isRepeat1X = false
isLoop = true
toastMessage = R.string.repeat_loop_enabled
}
isLoop -> {
isLoop = false
toastMessage = R.string.repeat_disabled
}
else -> isRepeat1X = true
}
playerService.getString(toastMessage)
.toToast(playerService)
}
fun repeat(updatePlaybackStatus: Boolean) {
getRepeatMode()
if (updatePlaybackStatus) updatePlaybackStatus(true)
mMusicNotificationManager.updateRepeatIcon()
}
fun setQueueEnabled(enabled: Boolean) {
isQueue = enabled
isQueueStarted = false
when {
isQueue -> {
preQueueSong = Pair(currentSong.first, mPlayingAlbumSongs)
isPlayingFromFolderPreQueue = isPlayingFromFolder
isQueue = true
mediaPlayerInterface.onQueueEnabled()
}
else -> {
queueSongs.clear()
mediaPlayerInterface.onQueueCleared()
mediaPlayerInterface.onQueueStartedOrEnded(false)
}
}
}
fun skip(isNext: Boolean) {
when {
isQueue -> manageQueue(isNext)
else -> {
currentSong = Pair(getSkipSong(isNext), false)
initMediaPlayer(currentSong.first)
}
}
}
fun seekTo(position: Int, updatePlaybackStatus: Boolean, restoreProgressCallBack: Boolean) {
if (isMediaPlayer) {
mediaPlayer.setOnSeekCompleteListener { mp ->
mp.setOnSeekCompleteListener(null)
if (restoreProgressCallBack) startUpdatingCallbackWithPosition()
if (updatePlaybackStatus) updatePlaybackStatus(!restoreProgressCallBack)
}
mediaPlayer.seekTo(position)
}
}
/**
* Reconfigures the player according to audio focus settings and starts/restarts it. This method
* starts/restarts the MediaPlayer instance respecting the current audio focus state. So if we
* have focus, it will play normally; if we don't have focus, it will either leave the player
* paused or set it to a low volume, depending on what is permitted by the current focus
* settings.
*/
private fun configurePlayerState() {
if (isMediaPlayer) {
when (mCurrentAudioFocusState) {
AUDIO_NO_FOCUS_NO_DUCK -> pauseMediaPlayer()
else -> {
when (mCurrentAudioFocusState) {
AUDIO_NO_FOCUS_CAN_DUCK -> mediaPlayer.setVolume(VOLUME_DUCK, VOLUME_DUCK)
else -> mediaPlayer.setVolume(VOLUME_NORMAL, VOLUME_NORMAL)
}
// If we were playing when we lost focus, we need to resume playing.
if (sPlayOnFocusGain) {
resumeMediaPlayer()
sPlayOnFocusGain = false
}
}
}
}
}
/* Sets the volume of the media player */
fun setPreciseVolume(percent: Int) {
currentVolumeInPercent = percent
if (isMediaPlayer) {
fun volFromPercent(percent: Int): Float {
if (percent == 100) return 1f
return (1 - (ln((101 - percent).toFloat()) / ln(101f)))
}
val new = volFromPercent(percent)
mediaPlayer.setVolume(new, new)
}
}
fun stopPlaybackService(stopPlayback: Boolean) {
if (playerService.isRunning && isMediaPlayer && stopPlayback) {
playerService.stopForeground(true)
playerService.stopSelf()
}
mediaPlayerInterface.onClose()
}
private inner class NotificationReceiver : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
val action = intent.action
if (action != null) {
when (action) {
GoConstants.PREV_ACTION -> instantReset()
GoConstants.PLAY_PAUSE_ACTION -> resumeOrPause()
GoConstants.NEXT_ACTION -> skip(true)
GoConstants.REPEAT_ACTION -> {
repeat(true)
mediaPlayerInterface.onUpdateRepeatStatus()
}
GoConstants.CLOSE_ACTION -> if (playerService.isRunning && isMediaPlayer) stopPlaybackService(
stopPlayback = true
)
BluetoothDevice.ACTION_ACL_DISCONNECTED -> if (::currentSong.isInitialized && goPreferences.isHeadsetPlugEnabled) pauseMediaPlayer()
BluetoothDevice.ACTION_ACL_CONNECTED -> if (::currentSong.isInitialized && goPreferences.isHeadsetPlugEnabled) resumeMediaPlayer()
AudioManager.ACTION_SCO_AUDIO_STATE_UPDATED ->
when (intent.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, -1)) {
AudioManager.SCO_AUDIO_STATE_CONNECTED -> if (isCurrentSong && goPreferences.isHeadsetPlugEnabled) resumeMediaPlayer()
AudioManager.SCO_AUDIO_STATE_DISCONNECTED -> if (isCurrentSong && goPreferences.isHeadsetPlugEnabled) pauseMediaPlayer()
}
Intent.ACTION_HEADSET_PLUG -> if (isCurrentSong && goPreferences.isHeadsetPlugEnabled) {
when (intent.getIntExtra("state", -1)) {
// 0 means disconnected
HEADSET_DISCONNECTED -> if (isCurrentSong && goPreferences.isHeadsetPlugEnabled) pauseMediaPlayer()
// 1 means connected
HEADSET_CONNECTED -> if (isCurrentSong && goPreferences.isHeadsetPlugEnabled) resumeMediaPlayer()
}
}
AudioManager.ACTION_AUDIO_BECOMING_NOISY -> if (isPlaying && goPreferences.isHeadsetPlugEnabled) pauseMediaPlayer()
}
}
if (isOrderedBroadcast) abortBroadcast()
}
}
}