mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-12-20 19:06:06 +01:00
303 lines
8.9 KiB
JavaScript
303 lines
8.9 KiB
JavaScript
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const Path = require('path')
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const fs = require('fs-extra')
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const workerThreads = require('worker_threads')
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const Logger = require('../Logger')
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const Download = require('../objects/Download')
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const filePerms = require('../utils/filePerms')
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const { getId } = require('../utils/index')
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const { writeConcatFile, writeMetadataFile } = require('../utils/ffmpegHelpers')
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const { getFileSize } = require('../utils/fileUtils')
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class AbMergeManager {
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constructor(db, clientEmitter) {
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this.db = db
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this.clientEmitter = clientEmitter
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this.downloadDirPath = Path.join(global.MetadataPath, 'downloads')
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this.downloadDirPathExist = false
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this.pendingDownloads = []
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this.downloads = []
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}
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async ensureDownloadDirPath() { // Creates download path if necessary and sets owner and permissions
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if (this.downloadDirPathExist) return
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var pathCreated = false
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if (!(await fs.pathExists(this.downloadDirPath))) {
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await fs.mkdir(this.downloadDirPath)
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pathCreated = true
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}
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if (pathCreated) {
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await filePerms.setDefault(this.downloadDirPath)
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}
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this.downloadDirPathExist = true
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}
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getDownload(downloadId) {
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return this.downloads.find(d => d.id === downloadId)
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}
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removeDownloadById(downloadId) {
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var download = this.getDownload(downloadId)
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if (download) {
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this.removeDownload(download)
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}
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}
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async removeOrphanDownloads() {
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try {
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var dirs = await fs.readdir(this.downloadDirPath)
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if (!dirs || !dirs.length) return true
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dirs = dirs.filter(d => d.startsWith('abmerge'))
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await Promise.all(dirs.map(async (dirname) => {
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var fullPath = Path.join(this.downloadDirPath, dirname)
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Logger.info(`Removing Orphan Download ${dirname}`)
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return fs.remove(fullPath)
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}))
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return true
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} catch (error) {
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return false
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}
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}
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async startAudiobookMerge(user, libraryItem) {
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var downloadId = getId('abmerge')
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var dlpath = Path.join(this.downloadDirPath, downloadId)
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Logger.info(`Start audiobook merge for ${libraryItem.id} - DownloadId: ${downloadId} - ${dlpath}`)
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var audiobookDirname = Path.basename(libraryItem.path)
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var filename = audiobookDirname + '.m4b'
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var downloadData = {
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id: downloadId,
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libraryItemId: libraryItem.id,
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type: 'abmerge',
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dirpath: dlpath,
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path: Path.join(dlpath, filename),
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filename,
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ext: '.m4b',
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userId: user.id
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}
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var download = new Download()
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download.setData(downloadData)
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download.setTimeoutTimer(this.downloadTimedOut.bind(this))
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try {
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await fs.mkdir(download.dirpath)
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} catch (error) {
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Logger.error(`[AbMergeManager] Failed to make directory ${download.dirpath}`)
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Logger.debug(`[AbMergeManager] Make directory error: ${error}`)
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var downloadJson = download.toJSON()
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this.clientEmitter(user.id, 'abmerge_failed', downloadJson)
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return
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}
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this.clientEmitter(user.id, 'abmerge_started', download.toJSON())
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this.runAudiobookMerge(libraryItem, download)
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}
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async runAudiobookMerge(libraryItem, download) {
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// If changing audio file type then encoding is needed
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var audioTracks = libraryItem.media.tracks
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var audioRequiresEncode = audioTracks[0].metadata.ext !== download.ext
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var shouldIncludeCover = libraryItem.media.coverPath
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var firstTrackIsM4b = audioTracks[0].metadata.ext.toLowerCase() === '.m4b'
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var isOneTrack = audioTracks.length === 1
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const ffmpegInputs = []
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if (!isOneTrack) {
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var concatFilePath = Path.join(download.dirpath, 'files.txt')
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console.log('Write files.txt', concatFilePath)
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await writeConcatFile(audioTracks, concatFilePath)
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ffmpegInputs.push({
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input: concatFilePath,
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options: ['-safe 0', '-f concat']
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})
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} else {
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ffmpegInputs.push({
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input: audioTracks[0].metadata.path,
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options: firstTrackIsM4b ? ['-f mp4'] : []
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})
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}
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const logLevel = process.env.NODE_ENV === 'production' ? 'error' : 'warning'
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var ffmpegOptions = [`-loglevel ${logLevel}`]
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var ffmpegOutputOptions = []
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if (audioRequiresEncode) {
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ffmpegOptions = ffmpegOptions.concat([
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'-map 0:a',
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'-acodec aac',
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'-ac 2',
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'-b:a 64k',
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'-movflags use_metadata_tags'
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])
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} else {
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ffmpegOptions.push('-max_muxing_queue_size 1000')
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if (isOneTrack && firstTrackIsM4b && !shouldIncludeCover) {
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ffmpegOptions.push('-c copy')
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} else {
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ffmpegOptions.push('-c:a copy')
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}
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}
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if (download.ext === '.m4b') {
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ffmpegOutputOptions.push('-f mp4')
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}
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// Create ffmetadata file
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var metadataFilePath = Path.join(download.dirpath, 'metadata.txt')
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await writeMetadataFile(libraryItem, metadataFilePath)
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ffmpegInputs.push({
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input: metadataFilePath
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})
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ffmpegOptions.push('-map_metadata 1')
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// Embed cover art
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if (shouldIncludeCover) {
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var coverPath = libraryItem.media.coverPath.replace(/\\/g, '/')
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ffmpegInputs.push({
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input: coverPath,
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options: ['-f image2pipe']
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})
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ffmpegOptions.push('-c:v copy')
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ffmpegOptions.push('-map 2:v')
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}
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var workerData = {
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inputs: ffmpegInputs,
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options: ffmpegOptions,
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outputOptions: ffmpegOutputOptions,
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output: download.path,
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}
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var worker = null
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try {
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var workerPath = Path.join(global.appRoot, 'server/utils/downloadWorker.js')
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worker = new workerThreads.Worker(workerPath, { workerData })
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} catch (error) {
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Logger.error(`[AbMergeManager] Start worker thread failed`, error)
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if (download.userId) {
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var downloadJson = download.toJSON()
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this.clientEmitter(download.userId, 'abmerge_failed', downloadJson)
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}
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this.removeDownload(download)
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return
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}
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worker.on('message', (message) => {
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if (message != null && typeof message === 'object') {
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if (message.type === 'RESULT') {
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if (!download.isTimedOut) {
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this.sendResult(download, message)
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}
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} else if (message.type === 'FFMPEG') {
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if (Logger[message.level]) {
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Logger[message.level](message.log)
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}
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}
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} else {
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Logger.error('Invalid worker message', message)
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}
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})
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this.pendingDownloads.push({
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id: download.id,
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download,
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worker
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})
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}
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async sendResult(download, result) {
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download.clearTimeoutTimer()
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// Remove pending download
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this.pendingDownloads = this.pendingDownloads.filter(d => d.id !== download.id)
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if (result.isKilled) {
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if (download.userId) {
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this.clientEmitter(download.userId, 'abmerge_killed', download.toJSON())
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}
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return
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}
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if (!result.success) {
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if (download.userId) {
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this.clientEmitter(download.userId, 'abmerge_failed', download.toJSON())
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}
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this.removeDownload(download)
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return
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}
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// Set file permissions and ownership
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await filePerms.setDefault(download.path)
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var filesize = await getFileSize(download.path)
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download.setComplete(filesize)
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if (download.userId) {
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this.clientEmitter(download.userId, 'abmerge_ready', download.toJSON())
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}
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download.setExpirationTimer(this.downloadExpired.bind(this))
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this.downloads.push(download)
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Logger.info(`[AbMergeManager] Download Ready ${download.id}`)
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}
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async downloadExpired(download) {
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Logger.info(`[AbMergeManager] Download ${download.id} expired`)
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if (download.userId) {
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this.clientEmitter(download.userId, 'abmerge_expired', download.toJSON())
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}
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this.removeDownload(download)
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}
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async downloadTimedOut(download) {
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Logger.info(`[AbMergeManager] Download ${download.id} timed out (${download.timeoutTimeMs}ms)`)
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if (download.userId) {
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var downloadJson = download.toJSON()
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downloadJson.isTimedOut = true
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this.clientEmitter(download.userId, 'abmerge_failed', downloadJson)
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}
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this.removeDownload(download)
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}
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async removeDownload(download) {
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Logger.info('[AbMergeManager] Removing download ' + download.id)
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download.clearTimeoutTimer()
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download.clearExpirationTimer()
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var pendingDl = this.pendingDownloads.find(d => d.id === download.id)
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if (pendingDl) {
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this.pendingDownloads = this.pendingDownloads.filter(d => d.id !== download.id)
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Logger.warn(`[AbMergeManager] Removing download in progress - stopping worker`)
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if (pendingDl.worker) {
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try {
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pendingDl.worker.postMessage('STOP')
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} catch (error) {
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Logger.error('[AbMergeManager] Error posting stop message to worker', error)
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}
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}
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}
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await fs.remove(download.dirpath).then(() => {
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Logger.info('[AbMergeManager] Deleted download', download.dirpath)
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}).catch((err) => {
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Logger.error('[AbMergeManager] Failed to delete download', err)
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})
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this.downloads = this.downloads.filter(d => d.id !== download.id)
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}
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}
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module.exports = AbMergeManager
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