main.lavalink.server.player.AudioLossCounter.kt Maven / Gradle / Ivy
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/*
* Copyright (c) 2021 Freya Arbjerg and contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package lavalink.server.player
import com.sedmelluq.discord.lavaplayer.player.event.*
class AudioLossCounter : AudioEventListener {
companion object {
const val EXPECTED_PACKET_COUNT_PER_MIN = 60 * 1000 / 20 // 20ms packets
private const val ACCEPTABLE_TRACK_SWITCH_TIME = 100 //ms
}
private var playingSince = Long.MAX_VALUE
private var lastTrackStarted = Long.MAX_VALUE / 2
private var lastTrackEnded = Long.MAX_VALUE
private var curMinute: Long = 0
private var curLoss = 0
private var curSucc = 0
var lastMinuteLoss = 0
private set
var lastMinuteSuccess = 0
private set
fun onLoss() {
checkTime()
curLoss++
}
fun onSuccess() {
checkTime()
curSucc++
}
val isDataUsable: Boolean
get() {
// Check that there isn't a significant gap in playback. If no track has ended yet, we can look past that
if (lastTrackStarted - lastTrackEnded > ACCEPTABLE_TRACK_SWITCH_TIME && lastTrackEnded != Long.MAX_VALUE) {
return false
}
// Check that we have at least stats for the last minute
val lastMin = System.currentTimeMillis() / 60000 - 1
return playingSince < lastMin * 60000
}
private fun checkTime() {
val actualMinute = System.currentTimeMillis() / 60000
if (curMinute != actualMinute) {
lastMinuteLoss = curLoss
lastMinuteSuccess = curSucc
curLoss = 0
curSucc = 0
curMinute = actualMinute
}
}
override fun onEvent(event: AudioEvent) {
when (event) {
is PlayerPauseEvent,
is TrackEndEvent,
-> lastTrackEnded = System.currentTimeMillis()
is PlayerResumeEvent,
is TrackStartEvent,
-> {
lastTrackStarted = System.currentTimeMillis()
if (lastTrackStarted - lastTrackEnded > ACCEPTABLE_TRACK_SWITCH_TIME || playingSince == Long.MAX_VALUE) {
playingSince = System.currentTimeMillis()
lastTrackEnded = Long.MAX_VALUE
}
}
}
}
override fun toString(): String = buildString {
append("AudioLossCounter{")
append("lastLoss=$lastMinuteLoss, ")
append("lastSucc=$lastMinuteSuccess, ")
append("total=${lastMinuteSuccess + lastMinuteLoss}")
append('}')
}
}