520 lines
16 KiB
TypeScript
520 lines
16 KiB
TypeScript
import { mapSeries } from 'bluebird'
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import { FSWatcher, watch } from 'chokidar'
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import { EventEmitter } from 'events'
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import { appendFile, ensureDir, readFile, stat } from 'fs-extra'
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import PQueue from 'p-queue'
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import { basename, join } from 'path'
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import { computeOutputFPS } from '@server/helpers/ffmpeg'
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import { logger, loggerTagsFactory, LoggerTagsFn } from '@server/helpers/logger'
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import { CONFIG } from '@server/initializers/config'
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import { MEMOIZE_TTL, P2P_MEDIA_LOADER_PEER_VERSION, VIDEO_LIVE } from '@server/initializers/constants'
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import {
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removeHLSFileObjectStorageByPath,
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storeHLSFileFromContent,
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storeHLSFileFromFilename,
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storeHLSFileFromPath
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} from '@server/lib/object-storage'
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import { VideoFileModel } from '@server/models/video/video-file'
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import { VideoStreamingPlaylistModel } from '@server/models/video/video-streaming-playlist'
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import { MStreamingPlaylistVideo, MUserId, MVideoLiveVideo } from '@server/types/models'
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import { VideoStorage, VideoStreamingPlaylistType } from '@shared/models'
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import {
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generateHLSMasterPlaylistFilename,
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generateHlsSha256SegmentsFilename,
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getLiveDirectory,
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getLiveReplayBaseDirectory
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} from '../../paths'
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import { isAbleToUploadVideo } from '../../user'
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import { LiveQuotaStore } from '../live-quota-store'
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import { LiveSegmentShaStore } from '../live-segment-sha-store'
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import { buildConcatenatedName, getLiveSegmentTime } from '../live-utils'
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import { AbstractTranscodingWrapper, FFmpegTranscodingWrapper, RemoteTranscodingWrapper } from './transcoding-wrapper'
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import memoizee = require('memoizee')
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interface MuxingSessionEvents {
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'live-ready': (options: { videoUUID: string }) => void
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'bad-socket-health': (options: { videoUUID: string }) => void
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'duration-exceeded': (options: { videoUUID: string }) => void
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'quota-exceeded': (options: { videoUUID: string }) => void
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'transcoding-end': (options: { videoUUID: string }) => void
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'transcoding-error': (options: { videoUUID: string }) => void
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'after-cleanup': (options: { videoUUID: string }) => void
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}
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declare interface MuxingSession {
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on<U extends keyof MuxingSessionEvents>(
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event: U, listener: MuxingSessionEvents[U]
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): this
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emit<U extends keyof MuxingSessionEvents>(
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event: U, ...args: Parameters<MuxingSessionEvents[U]>
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): boolean
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}
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class MuxingSession extends EventEmitter {
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private transcodingWrapper: AbstractTranscodingWrapper
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private readonly context: any
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private readonly user: MUserId
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private readonly sessionId: string
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private readonly videoLive: MVideoLiveVideo
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private readonly inputLocalUrl: string
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private readonly inputPublicUrl: string
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private readonly fps: number
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private readonly allResolutions: number[]
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private readonly bitrate: number
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private readonly ratio: number
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private readonly hasAudio: boolean
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private readonly videoUUID: string
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private readonly saveReplay: boolean
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private readonly outDirectory: string
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private readonly replayDirectory: string
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private readonly lTags: LoggerTagsFn
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// Path -> Queue
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private readonly objectStorageSendQueues = new Map<string, PQueue>()
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private segmentsToProcessPerPlaylist: { [playlistId: string]: string[] } = {}
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private streamingPlaylist: MStreamingPlaylistVideo
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private liveSegmentShaStore: LiveSegmentShaStore
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private filesWatcher: FSWatcher
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private masterPlaylistCreated = false
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private liveReady = false
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private aborted = false
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private readonly isAbleToUploadVideoWithCache = memoizee((userId: number) => {
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return isAbleToUploadVideo(userId, 1000)
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}, { maxAge: MEMOIZE_TTL.LIVE_ABLE_TO_UPLOAD })
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private readonly hasClientSocketInBadHealthWithCache = memoizee((sessionId: string) => {
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return this.hasClientSocketInBadHealth(sessionId)
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}, { maxAge: MEMOIZE_TTL.LIVE_CHECK_SOCKET_HEALTH })
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constructor (options: {
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context: any
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user: MUserId
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sessionId: string
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videoLive: MVideoLiveVideo
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inputLocalUrl: string
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inputPublicUrl: string
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fps: number
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bitrate: number
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ratio: number
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allResolutions: number[]
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hasAudio: boolean
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}) {
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super()
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this.context = options.context
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this.user = options.user
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this.sessionId = options.sessionId
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this.videoLive = options.videoLive
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this.inputLocalUrl = options.inputLocalUrl
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this.inputPublicUrl = options.inputPublicUrl
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this.fps = options.fps
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this.bitrate = options.bitrate
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this.ratio = options.ratio
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this.hasAudio = options.hasAudio
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this.allResolutions = options.allResolutions
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this.videoUUID = this.videoLive.Video.uuid
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this.saveReplay = this.videoLive.saveReplay
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this.outDirectory = getLiveDirectory(this.videoLive.Video)
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this.replayDirectory = join(getLiveReplayBaseDirectory(this.videoLive.Video), new Date().toISOString())
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this.lTags = loggerTagsFactory('live', this.sessionId, this.videoUUID)
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}
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async runMuxing () {
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this.streamingPlaylist = await this.createLivePlaylist()
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this.createLiveShaStore()
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this.createFiles()
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await this.prepareDirectories()
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this.transcodingWrapper = this.buildTranscodingWrapper()
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this.transcodingWrapper.on('end', () => this.onTranscodedEnded())
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this.transcodingWrapper.on('error', () => this.onTranscodingError())
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await this.transcodingWrapper.run()
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this.filesWatcher = watch(this.outDirectory, { depth: 0 })
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this.watchMasterFile()
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this.watchTSFiles()
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}
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abort () {
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if (!this.transcodingWrapper) return
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this.aborted = true
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this.transcodingWrapper.abort()
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}
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destroy () {
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this.removeAllListeners()
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this.isAbleToUploadVideoWithCache.clear()
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this.hasClientSocketInBadHealthWithCache.clear()
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}
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private watchMasterFile () {
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this.filesWatcher.on('add', async path => {
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if (path !== join(this.outDirectory, this.streamingPlaylist.playlistFilename)) return
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if (this.masterPlaylistCreated === true) return
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try {
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if (this.streamingPlaylist.storage === VideoStorage.OBJECT_STORAGE) {
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const url = await storeHLSFileFromFilename(this.streamingPlaylist, this.streamingPlaylist.playlistFilename)
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this.streamingPlaylist.playlistUrl = url
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}
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this.streamingPlaylist.assignP2PMediaLoaderInfoHashes(this.videoLive.Video, this.allResolutions)
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await this.streamingPlaylist.save()
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} catch (err) {
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logger.error('Cannot update streaming playlist.', { err, ...this.lTags() })
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}
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this.masterPlaylistCreated = true
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logger.info('Master playlist file for %s has been created', this.videoUUID, this.lTags())
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})
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}
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private watchTSFiles () {
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const startStreamDateTime = new Date().getTime()
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const addHandler = async (segmentPath: string) => {
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if (segmentPath.endsWith('.ts') !== true) return
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logger.debug('Live add handler of TS file %s.', segmentPath, this.lTags())
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const playlistId = this.getPlaylistIdFromTS(segmentPath)
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const segmentsToProcess = this.segmentsToProcessPerPlaylist[playlistId] || []
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this.processSegments(segmentsToProcess)
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this.segmentsToProcessPerPlaylist[playlistId] = [ segmentPath ]
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if (this.hasClientSocketInBadHealthWithCache(this.sessionId)) {
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this.emit('bad-socket-health', { videoUUID: this.videoUUID })
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return
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}
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// Duration constraint check
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if (this.isDurationConstraintValid(startStreamDateTime) !== true) {
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this.emit('duration-exceeded', { videoUUID: this.videoUUID })
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return
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}
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// Check user quota if the user enabled replay saving
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if (await this.isQuotaExceeded(segmentPath) === true) {
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this.emit('quota-exceeded', { videoUUID: this.videoUUID })
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}
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}
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const deleteHandler = async (segmentPath: string) => {
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if (segmentPath.endsWith('.ts') !== true) return
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logger.debug('Live delete handler of TS file %s.', segmentPath, this.lTags())
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try {
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await this.liveSegmentShaStore.removeSegmentSha(segmentPath)
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} catch (err) {
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logger.warn('Cannot remove segment sha %s from sha store', segmentPath, { err, ...this.lTags() })
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}
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if (this.streamingPlaylist.storage === VideoStorage.OBJECT_STORAGE) {
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try {
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await removeHLSFileObjectStorageByPath(this.streamingPlaylist, segmentPath)
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} catch (err) {
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logger.error('Cannot remove segment %s from object storage', segmentPath, { err, ...this.lTags() })
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}
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}
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}
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this.filesWatcher.on('add', p => addHandler(p))
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this.filesWatcher.on('unlink', p => deleteHandler(p))
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}
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private async isQuotaExceeded (segmentPath: string) {
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if (this.saveReplay !== true) return false
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if (this.aborted) return false
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try {
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const segmentStat = await stat(segmentPath)
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LiveQuotaStore.Instance.addQuotaTo(this.user.id, this.sessionId, segmentStat.size)
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const canUpload = await this.isAbleToUploadVideoWithCache(this.user.id)
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return canUpload !== true
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} catch (err) {
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logger.error('Cannot stat %s or check quota of %d.', segmentPath, this.user.id, { err, ...this.lTags() })
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}
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}
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private createFiles () {
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for (let i = 0; i < this.allResolutions.length; i++) {
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const resolution = this.allResolutions[i]
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const file = new VideoFileModel({
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resolution,
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size: -1,
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extname: '.ts',
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infoHash: null,
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fps: this.fps,
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storage: this.streamingPlaylist.storage,
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videoStreamingPlaylistId: this.streamingPlaylist.id
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})
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VideoFileModel.customUpsert(file, 'streaming-playlist', null)
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.catch(err => logger.error('Cannot create file for live streaming.', { err, ...this.lTags() }))
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}
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}
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private async prepareDirectories () {
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await ensureDir(this.outDirectory)
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if (this.videoLive.saveReplay === true) {
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await ensureDir(this.replayDirectory)
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}
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}
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private isDurationConstraintValid (streamingStartTime: number) {
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const maxDuration = CONFIG.LIVE.MAX_DURATION
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// No limit
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if (maxDuration < 0) return true
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const now = new Date().getTime()
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const max = streamingStartTime + maxDuration
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return now <= max
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}
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private processSegments (segmentPaths: string[]) {
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mapSeries(segmentPaths, previousSegment => this.processSegment(previousSegment))
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.catch(err => {
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if (this.aborted) return
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logger.error('Cannot process segments', { err, ...this.lTags() })
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})
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}
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private async processSegment (segmentPath: string) {
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// Add sha hash of previous segments, because ffmpeg should have finished generating them
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await this.liveSegmentShaStore.addSegmentSha(segmentPath)
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if (this.saveReplay) {
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await this.addSegmentToReplay(segmentPath)
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}
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if (this.streamingPlaylist.storage === VideoStorage.OBJECT_STORAGE) {
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try {
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await storeHLSFileFromPath(this.streamingPlaylist, segmentPath)
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await this.processM3U8ToObjectStorage(segmentPath)
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} catch (err) {
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logger.error('Cannot store TS segment %s in object storage', segmentPath, { err, ...this.lTags() })
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}
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}
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// Master playlist and segment JSON file are created, live is ready
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if (this.masterPlaylistCreated && !this.liveReady) {
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this.liveReady = true
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this.emit('live-ready', { videoUUID: this.videoUUID })
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}
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}
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private async processM3U8ToObjectStorage (segmentPath: string) {
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const m3u8Path = join(this.outDirectory, this.getPlaylistNameFromTS(segmentPath))
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logger.debug('Process M3U8 file %s.', m3u8Path, this.lTags())
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const segmentName = basename(segmentPath)
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const playlistContent = await readFile(m3u8Path, 'utf-8')
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// Remove new chunk references, that will be processed later
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const filteredPlaylistContent = playlistContent.substring(0, playlistContent.lastIndexOf(segmentName) + segmentName.length) + '\n'
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try {
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if (!this.objectStorageSendQueues.has(m3u8Path)) {
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this.objectStorageSendQueues.set(m3u8Path, new PQueue({ concurrency: 1 }))
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}
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const queue = this.objectStorageSendQueues.get(m3u8Path)
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await queue.add(() => storeHLSFileFromContent(this.streamingPlaylist, m3u8Path, filteredPlaylistContent))
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} catch (err) {
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logger.error('Cannot store in object storage m3u8 file %s', m3u8Path, { err, ...this.lTags() })
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}
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}
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private onTranscodingError () {
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this.emit('transcoding-error', ({ videoUUID: this.videoUUID }))
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}
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private onTranscodedEnded () {
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this.emit('transcoding-end', ({ videoUUID: this.videoUUID }))
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logger.info('RTMP transmuxing for video %s ended. Scheduling cleanup', this.inputLocalUrl, this.lTags())
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setTimeout(() => {
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// Wait latest segments generation, and close watchers
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const promise = this.filesWatcher?.close() || Promise.resolve()
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promise
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.then(() => {
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// Process remaining segments hash
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for (const key of Object.keys(this.segmentsToProcessPerPlaylist)) {
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this.processSegments(this.segmentsToProcessPerPlaylist[key])
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}
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})
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.catch(err => {
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logger.error(
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'Cannot close watchers of %s or process remaining hash segments.', this.outDirectory,
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{ err, ...this.lTags() }
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)
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})
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this.emit('after-cleanup', { videoUUID: this.videoUUID })
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}, 1000)
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}
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private hasClientSocketInBadHealth (sessionId: string) {
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const rtmpSession = this.context.sessions.get(sessionId)
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if (!rtmpSession) {
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logger.warn('Cannot get session %s to check players socket health.', sessionId, this.lTags())
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return
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}
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for (const playerSessionId of rtmpSession.players) {
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const playerSession = this.context.sessions.get(playerSessionId)
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if (!playerSession) {
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logger.error('Cannot get player session %s to check socket health.', playerSession, this.lTags())
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continue
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}
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if (playerSession.socket.writableLength > VIDEO_LIVE.MAX_SOCKET_WAITING_DATA) {
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return true
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}
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}
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return false
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}
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private async addSegmentToReplay (segmentPath: string) {
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const segmentName = basename(segmentPath)
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const dest = join(this.replayDirectory, buildConcatenatedName(segmentName))
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try {
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const data = await readFile(segmentPath)
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await appendFile(dest, data)
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} catch (err) {
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logger.error('Cannot copy segment %s to replay directory.', segmentPath, { err, ...this.lTags() })
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}
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}
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private async createLivePlaylist (): Promise<MStreamingPlaylistVideo> {
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const playlist = await VideoStreamingPlaylistModel.loadOrGenerate(this.videoLive.Video)
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playlist.playlistFilename = generateHLSMasterPlaylistFilename(true)
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playlist.segmentsSha256Filename = generateHlsSha256SegmentsFilename(true)
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playlist.p2pMediaLoaderPeerVersion = P2P_MEDIA_LOADER_PEER_VERSION
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playlist.type = VideoStreamingPlaylistType.HLS
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playlist.storage = CONFIG.OBJECT_STORAGE.ENABLED
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? VideoStorage.OBJECT_STORAGE
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: VideoStorage.FILE_SYSTEM
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return playlist.save()
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}
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private createLiveShaStore () {
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this.liveSegmentShaStore = new LiveSegmentShaStore({
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videoUUID: this.videoLive.Video.uuid,
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sha256Path: join(this.outDirectory, this.streamingPlaylist.segmentsSha256Filename),
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streamingPlaylist: this.streamingPlaylist,
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sendToObjectStorage: CONFIG.OBJECT_STORAGE.ENABLED
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})
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}
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private buildTranscodingWrapper () {
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const options = {
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streamingPlaylist: this.streamingPlaylist,
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videoLive: this.videoLive,
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lTags: this.lTags,
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sessionId: this.sessionId,
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inputLocalUrl: this.inputLocalUrl,
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inputPublicUrl: this.inputPublicUrl,
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toTranscode: this.allResolutions.map(resolution => ({
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resolution,
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fps: computeOutputFPS({ inputFPS: this.fps, resolution })
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})),
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fps: this.fps,
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bitrate: this.bitrate,
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ratio: this.ratio,
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hasAudio: this.hasAudio,
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segmentListSize: VIDEO_LIVE.SEGMENTS_LIST_SIZE,
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segmentDuration: getLiveSegmentTime(this.videoLive.latencyMode),
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outDirectory: this.outDirectory
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}
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return CONFIG.LIVE.TRANSCODING.ENABLED && CONFIG.LIVE.TRANSCODING.REMOTE_RUNNERS.ENABLED
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? new RemoteTranscodingWrapper(options)
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: new FFmpegTranscodingWrapper(options)
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}
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private getPlaylistIdFromTS (segmentPath: string) {
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const playlistIdMatcher = /^([\d+])-/
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return basename(segmentPath).match(playlistIdMatcher)[1]
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}
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private getPlaylistNameFromTS (segmentPath: string) {
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return `${this.getPlaylistIdFromTS(segmentPath)}.m3u8`
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}
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}
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// ---------------------------------------------------------------------------
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export {
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MuxingSession
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}
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