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// stolen from http-music
// const { spawn } = require('child_process')
// const FIFO = require('fifo-js')
const EventEmitter = require('events')
const { commandExists, killProcess } = require('./general-util')
function getTimeStrings({curHour, curMin, curSec, lenHour, lenMin, lenSec}) {
// Multiplication casts to numbers; addition prioritizes strings.
// Thanks, JavaScript!
const curSecTotal = (3600 * curHour) + (60 * curMin) + (1 * curSec)
const lenSecTotal = (3600 * lenHour) + (60 * lenMin) + (1 * lenSec)
const percentVal = (100 / lenSecTotal) * curSecTotal
const percentDone = (
(Math.trunc(percentVal * 100) / 100).toFixed(2) + '%'
)
const leftSecTotal = lenSecTotal - curSecTotal
let leftHour = Math.floor(leftSecTotal / 3600)
let leftMin = Math.floor((leftSecTotal - leftHour * 3600) / 60)
let leftSec = Math.floor(leftSecTotal - leftHour * 3600 - leftMin * 60)
const pad = val => val.toString().padStart(2, '0')
curMin = pad(curMin)
curSec = pad(curSec)
lenMin = pad(lenMin)
lenSec = pad(lenSec)
leftMin = pad(leftMin)
leftSec = pad(leftSec)
// We don't want to display hour counters if the total length is less
// than an hour.
let timeDone, timeLeft, duration
if (parseInt(lenHour) > 0) {
timeDone = `${curHour}:${curMin}:${curSec}`
timeLeft = `${leftHour}:${leftMin}:${leftSec}`
duration = `${lenHour}:${lenMin}:${lenSec}`
} else {
timeDone = `${curMin}:${curSec}`
timeLeft = `${leftMin}:${leftSec}`
duration = `${lenMin}:${lenSec}`
}
return {percentDone, timeDone, timeLeft, duration, curSecTotal, lenSecTotal}
}
class Player extends EventEmitter {
constructor() {
super()
this.disablePlaybackStatus = false
}
playFile(file) {}
seekAhead(secs) {}
seekBack(secs) {}
volUp(amount) {}
volDown(amount) {}
togglePause() {}
async kill() {}
printStatusLine(data) {
// Quick sanity check - we don't want to print the status line if it's
// disabled! Hopefully printStatusLine won't be called in that case, but
// if it is, we should be careful.
if (!this.disablePlaybackStatus) {
this.emit('printStatusLine', data)
}
}
}
module.exports.WebPlayer = class extends Player {
constructor() {
super()
this.audioEl = document.createElement('audio')
}
playFile(file) {
this.audioEl.src = file
this.audioEl.play()
}
}
module.exports.MPVPlayer = class extends Player {
getMPVOptions(file) {
return ['--no-video', file]
}
playFile(file) {
// The more powerful MPV player. MPV is virtually impossible for a human
// being to install; if you're having trouble with it, try the SoX player.
this.process = spawn('mpv', this.getMPVOptions(file))
this.process.stderr.on('data', data => {
if (this.disablePlaybackStatus) {
return
}
const match = data.toString().match(
/(..):(..):(..) \/ (..):(..):(..) \(([0-9]+)%\)/
)
if (match) {
const [
curHour, curMin, curSec, // ##:##:##
lenHour, lenMin, lenSec, // ##:##:##
percent // ###%
] = match.slice(1)
this.printStatusLine(getTimeStrings({curHour, curMin, curSec, lenHour, lenMin, lenSec}))
}
})
return new Promise(resolve => {
this.process.once('close', resolve)
})
}
}
module.exports.ControllableMPVPlayer = class extends module.exports.MPVPlayer {
getMPVOptions(file) {
return ['--input-file=' + this.fifo.path, ...super.getMPVOptions(file)]
}
playFile(file) {
this.fifo = new FIFO()
return super.playFile(file)
}
sendCommand(command) {
if (this.fifo) {
this.fifo.write(command)
}
}
seekAhead(secs) {
this.sendCommand(`seek +${parseFloat(secs)}`)
}
seekBack(secs) {
this.sendCommand(`seek -${parseFloat(secs)}`)
}
volUp(amount) {
this.sendCommand(`add volume +${parseFloat(amount)}`)
}
volDown(amount) {
this.sendCommand(`add volume -${parseFloat(amount)}`)
}
togglePause() {
this.sendCommand('cycle pause')
}
kill() {
if (this.fifo) {
this.fifo.close()
delete this.fifo
}
return super.kill()
}
}
module.exports.getPlayer = async function() {
return new module.exports.WebPlayer()
}
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