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{"version":3,"sources":["../play-audio/opus/DuplexStream.ts","../play-audio/opus/modules/play-opus.ts","../play-audio/opus/modules/opusscript.ts","../play-audio/opus/modules/loader.ts","../play-audio/opus/OpusEncoder.ts","../play-audio/opus/OpusDecoder.ts","../play-audio/ogg/OggDemuxer.ts","../play-audio/webm/WebmDemuxer.ts","../play-audio/webm/WebmConstant.ts","../play-audio/webm/WebmHeader.ts","../play-audio/ffmpeg/index.ts","../play-audio/index.ts"],"sourcesContent":["import { Duplex, DuplexOptions } from 'stream';\nimport { OpusHandlerOptions } from './modules/constant';\nimport { createOpusHandler, OpusEncoder } from './modules/loader';\n\nexport enum OpusCTL {\n SetBitrate = 4002,\n SetFEC = 4012,\n SetPLP = 4014\n}\n\nexport interface OpusTransformOptions extends OpusHandlerOptions {\n encoder?: 'play-opus' | 'opusscript';\n duplex?: DuplexOptions;\n}\n\nexport abstract class OpusDuplexStream extends Duplex {\n protected pcm_length: number;\n protected encoder: OpusEncoder;\n\n constructor(options: OpusTransformOptions) {\n super(options.duplex);\n const handler = createOpusHandler(options, options.encoder);\n if (handler instanceof Error) throw handler;\n this.encoder = handler;\n this.pcm_length = options.frameSize * options.channels * 2;\n }\n\n protected encode(buf: Buffer) {\n return this.encoder.encode(buf);\n }\n\n protected decode(buffer: Buffer) {\n return this.encoder.decode(buffer);\n }\n\n private cleanup() {\n this.encoder.delete();\n }\n\n _read() {}\n\n _destroy(error: Error | null, callback: (error: Error | null) => void): void {\n this.cleanup();\n callback(error);\n }\n\n public abstract _write(chunk: Buffer, enc: BufferEncoding, next: (error?: Error | null) => void): void;\n\n _final(callback: (error?: Error | null) => void): void {\n this.cleanup();\n this.push(null);\n callback();\n }\n\n public abstract applyCTL(ctl: number, value: number): void;\n\n public bitrate(bitrate: number) {\n return this.applyCTL(OpusCTL.SetBitrate, bitrate);\n }\n\n public setFEC(enabled: boolean) {\n return this.applyCTL(OpusCTL.SetFEC, enabled ? 1 : 0);\n }\n\n public setPLP(percentage: number) {\n return this.applyCTL(OpusCTL.SetPLP, Math.min(100, Math.max(0, percentage * 100)));\n }\n}\n","import { OpusHandlerOptions } from './constant';\n\nexport class OpusHandler {\n protected options: OpusHandlerOptions;\n private encoder: any;\n constructor(options: OpusHandlerOptions) {\n const pack = require('play-opus');\n this.options = options;\n this.encoder = new pack.OpusHandler(options.rate, options.channels);\n }\n\n encode(buf: Buffer): Buffer {\n return this.encoder.encode(buf);\n }\n\n decode(buf: Buffer): Buffer {\n return this.encoder.decode(buf);\n }\n\n encode_ctl(ctl: number, val: number) {\n this.encode_ctl(ctl, val);\n }\n\n decode_ctl(ctl: number, val: number) {\n this.decode_ctl(ctl, val);\n }\n\n delete() {\n this.encoder.delete();\n }\n}\n","import { OpusHandlerOptions } from './constant';\n\nexport class OpusHandler {\n protected options: OpusHandlerOptions;\n private encoder: any;\n constructor(options: OpusHandlerOptions) {\n const OpusScript = require('opusscript');\n this.options = options;\n this.encoder = new OpusScript(options.rate, options.channels);\n }\n\n encode(buf: Buffer): Buffer {\n return this.encoder.encode(buf, this.options.frameSize);\n }\n\n decode(buf: Buffer): Buffer {\n return this.encoder.decode(buf);\n }\n\n encode_ctl(ctl: number, val: number) {\n this.encode_ctl(ctl, val);\n }\n\n decode_ctl(ctl: number, val: number) {\n this.decode_ctl(ctl, val);\n }\n\n delete() {\n this.encoder.delete();\n }\n}\n","import { OpusHandlerOptions } from './constant';\nimport { OpusHandler as PlayHandler } from './play-opus';\nimport { OpusHandler as ScriptHandler } from './opusscript';\n\nexport type OpusEncoder = PlayHandler | ScriptHandler;\n\nconst modules = {\n 'play-opus': (options: OpusHandlerOptions) => new PlayHandler(options),\n 'opusscript': (options: OpusHandlerOptions) => new ScriptHandler(options)\n};\n\nexport function createOpusHandler(\n options: OpusHandlerOptions,\n preference?: 'play-opus' | 'opusscript'\n): OpusEncoder | Error {\n if (preference) {\n if (preference !== 'opusscript' && preference !== 'play-opus')\n return new Error('Supported modules for play-media :\\n- play-opus\\n- opusscript');\n try {\n require(preference);\n } catch {\n return new Error(`Module [${preference}] Not Found.`);\n }\n return modules[preference](options);\n } else {\n for (const [name, exec] of Object.entries(modules)) {\n try {\n require(name);\n return exec(options);\n } catch {\n continue;\n }\n }\n return new Error('No modules found. Try to install one of following :\\n- play-opus\\n- opusscript');\n }\n}\n","import { OpusDuplexStream, OpusTransformOptions } from './DuplexStream';\n\nexport class OpusEncoder extends OpusDuplexStream {\n private remaining: Buffer;\n\n constructor(options: OpusTransformOptions) {\n super(options);\n this.remaining = Buffer.allocUnsafe(0);\n }\n\n public _write(chunk: Buffer, _: BufferEncoding, done: (error?: Error | null) => void): void {\n const pcmChunk = Buffer.concat([this.remaining, chunk]);\n\n let i = 0;\n while (pcmChunk.length >= i + this.pcm_length) {\n const pcm = pcmChunk.slice(i, i + this.pcm_length);\n\n let opus: Buffer;\n\n try {\n opus = this.encode(pcm);\n } catch (err: any) {\n done(err);\n return;\n }\n this.push(opus);\n i += this.pcm_length;\n }\n\n if (i > 0) this.remaining = pcmChunk.slice(i);\n done();\n }\n\n applyCTL(ctl: number, value: number) {\n this.encoder.encode_ctl(ctl, value);\n }\n}\n","import { OpusDuplexStream, OpusTransformOptions } from './DuplexStream';\n\nconst OPUS_HEAD = Buffer.from('OpusHead');\nconst OPUS_TAGS = Buffer.from('OpusTags');\n\nexport class OpusDecoder extends OpusDuplexStream {\n opusHead?: Buffer;\n opusTags?: Buffer;\n\n constructor(options: OpusTransformOptions) {\n super(options);\n }\n\n public _write(chunk: Buffer, _: BufferEncoding, done: (error?: Error | null) => void): void {\n if (chunk.compare(OPUS_HEAD, 0, 8, 0, 8) === 0) {\n this.opusHead = chunk;\n this.emit('opusHead', chunk);\n } else if (chunk.compare(OPUS_TAGS, 0, 8, 0, 8) === 0) {\n this.opusTags = chunk;\n this.emit('opusTags', chunk);\n } else {\n let frame: Buffer;\n try {\n frame = this.encoder.decode(chunk);\n } catch (err: any) {\n done(err);\n return;\n }\n this.push(frame);\n }\n done();\n }\n\n applyCTL(ctl: number, value: number) {\n this.encoder.decode_ctl(ctl, value);\n }\n}\n","import { Duplex, DuplexOptions } from 'stream';\n\nconst OGG_PAGE_HEADER_SIZE = 26;\nconst OGG_VERSION = 0;\n\nconst OGGS_HEADER = Buffer.from('OggS');\nconst OPUS_HEAD = Buffer.from('OpusHead');\nconst OPUS_TAGS = Buffer.from('OpusTags');\n\ninterface OggHeader {\n pageSegments: number;\n sizes: number[];\n totalSize: number;\n}\n\ntype ParseResult = Error | Buffer | false;\n\nexport class OggDemuxer extends Duplex {\n private remaining?: Buffer;\n private opus_head?: Buffer;\n private ogg_head?: OggHeader;\n\n constructor(options?: DuplexOptions) {\n super(options);\n }\n\n public _read() {}\n\n public _write(chunk: Buffer, _: BufferEncoding, done: (error?: Error) => void) {\n if (this.remaining) {\n chunk = Buffer.concat([this.remaining, chunk]);\n this.remaining = undefined;\n }\n\n while (true) {\n const result = this.readOggPage(chunk);\n if (result) {\n if (result instanceof Error) done(result);\n else chunk = result;\n } else break;\n }\n\n this.remaining = chunk;\n this.ogg_head = undefined;\n done();\n }\n\n private readOggPage(chunk: Buffer): ParseResult {\n if (!this.ogg_head) {\n const result_head = this.readOggHead(chunk);\n if (!result_head) return false;\n if (result_head instanceof Error) return result_head;\n return this.readOggData(result_head);\n } else return this.readOggData(chunk);\n }\n\n private readOggData(chunk: Buffer): ParseResult {\n if (!this.ogg_head) return false;\n if (chunk.length < this.ogg_head.totalSize) return false;\n\n let start = 0;\n for (const size of this.ogg_head.sizes) {\n const segment = chunk.slice(start, start + size);\n if (this.opus_head) {\n if (size >= 8 && segment.compare(OPUS_TAGS, 0, 8, 0, 8) === 0) this.emit('tags', segment);\n else this.push(segment);\n } else if (segment.compare(OPUS_HEAD, 0, 8, 0, 8) === 0) {\n this.emit('head', segment);\n this.opus_head = segment;\n } else return new Error('Unknown Segment Found');\n start += size;\n }\n this.ogg_head = undefined;\n return chunk.slice(start);\n }\n\n private readOggHead(chunk: Buffer): ParseResult {\n if (chunk.length < OGG_PAGE_HEADER_SIZE) return false;\n if (chunk.compare(OGGS_HEADER, 0, 4, 0, 4) !== 0) return new Error('Capture Pattern is not OggS');\n if (chunk.readUInt8(4) !== OGG_VERSION) return new Error(`OGG version is not equal to 0.`);\n\n if (chunk.length < 27) return false;\n const pageSegments = chunk.readUInt8(26);\n if (chunk.length < 27 + pageSegments) return false;\n const table = chunk.slice(27, 27 + pageSegments);\n\n const sizes: number[] = [];\n let totalSize = 0;\n\n for (let i = 0; i < pageSegments; ) {\n let size = 0;\n let x = 255;\n while (x === 255) {\n if (i >= table.length) return false;\n x = table.readUInt8(i);\n i++;\n size += x;\n }\n sizes.push(size);\n totalSize += size;\n }\n this.ogg_head = {\n sizes: sizes,\n totalSize: totalSize,\n pageSegments: pageSegments\n };\n return chunk.slice(27 + pageSegments);\n }\n\n public _destroy(err: Error | null, callback: (error: Error | null) => void): void {\n this._cleanup();\n callback(err);\n }\n\n public _final(callback: (error?: Error) => void): void {\n this._cleanup();\n this.push(null);\n callback();\n }\n\n public _cleanup() {\n this.remaining = undefined;\n this.opus_head = undefined;\n this.ogg_head = undefined;\n }\n}\n","import { Duplex, DuplexOptions } from 'stream';\nimport { DataType, WebmElements } from './WebmConstant';\nimport { WebmHeader } from './WebmHeader';\n\nexport class WebmDemuxer extends Duplex {\n remaining?: Buffer;\n chunk?: Buffer;\n cursor: number;\n header: WebmHeader;\n headfound: boolean;\n private data_size: number;\n private data_length: number;\n\n constructor(options?: DuplexOptions) {\n super(options);\n this.cursor = 0;\n this.header = new WebmHeader();\n this.headfound = false;\n this.data_length = 0;\n this.data_size = 0;\n }\n\n private get vint_length(): number {\n let i = 0;\n for (; i < 8; i++) {\n if ((1 << (7 - i)) & this.chunk![this.cursor]) break;\n }\n return ++i;\n }\n\n private get vint_value(): boolean {\n if (!this.chunk) return false;\n const length = this.vint_length;\n if (this.chunk.length < this.cursor + length) return false;\n let value = this.chunk[this.cursor] & ((1 << (8 - length)) - 1);\n for (let i = this.cursor + 1; i < this.cursor + length; i++) value = (value << 8) + this.chunk[i];\n this.data_size = length;\n this.data_length = value;\n return true;\n }\n\n cleanup() {\n this.cursor = 0;\n this.chunk = undefined;\n this.remaining = undefined;\n }\n\n _read() {}\n\n _write(chunk: Buffer, _: BufferEncoding, done: (error?: Error | null) => void): void {\n if (this.remaining) {\n this.chunk = Buffer.concat([this.remaining, chunk]);\n this.remaining = undefined;\n } else this.chunk = chunk;\n const tag = this.readTag();\n\n if (tag instanceof Error) done(tag);\n else done();\n }\n\n private readTag() {\n if (!this.chunk) return new Error('Chunk is missing');\n\n while (this.chunk.length > this.cursor) {\n const oldCursor = this.cursor;\n const id = this.vint_length;\n if (this.chunk.length < this.cursor + id) break;\n\n const ebmlID = this.parseEbmlID(this.chunk.slice(this.cursor, this.cursor + id).toString('hex'));\n this.cursor += id;\n const vint = this.vint_value;\n\n if (!vint) {\n this.cursor = oldCursor;\n break;\n }\n if (!ebmlID) {\n this.cursor += this.data_size + this.data_length;\n continue;\n }\n\n if (!this.headfound) {\n if (ebmlID.name === 'ebml') this.headfound = true;\n else return new Error('Failed to find EBML ID at start of stream.');\n }\n\n const data = this.chunk.slice(\n this.cursor + this.data_size,\n this.cursor + this.data_size + this.data_length\n );\n const parse = this.header.parse(ebmlID, data);\n if (parse instanceof Error) return parse;\n\n if (ebmlID.type === DataType.master) {\n this.cursor += this.data_size;\n continue;\n }\n\n if (this.chunk.length < this.cursor + this.data_size + this.data_length) {\n this.cursor = oldCursor;\n break;\n } else this.cursor += this.data_size + this.data_length;\n\n if (ebmlID.name === 'simpleBlock') {\n const track = this.header.segment.tracks![this.header.audioTrack];\n if (!track || track.trackType !== 2) return new Error('No audio Track in this webm file.');\n if ((data[0] & 0xf) === track.trackNumber) this.push(data.slice(4));\n }\n }\n this.remaining = this.chunk.slice(this.cursor);\n this.cursor = 0;\n }\n\n private parseEbmlID(ebmlID: string) {\n if (Object.keys(WebmElements).includes(ebmlID)) return WebmElements[ebmlID];\n else return false;\n }\n\n _destroy(error: Error | null, callback: (error: Error | null) => void): void {\n this.cleanup();\n callback(error);\n }\n\n _final(callback: (error?: Error | null) => void): void {\n this.cleanup();\n this.push(null);\n callback();\n }\n}\n","export enum DataType {\n master,\n string,\n uint,\n binary,\n float\n}\n\nexport const DataReturn = {\n string: (buf: Buffer) => buf.toString('utf-8'),\n uint: (buf: Buffer) => parseInt(buf.toString('hex'), 16),\n float: (buf: Buffer) => parseFloat(buf.toString('utf-8'))\n};\n\nexport type DataReturnType = (buf: Buffer) => string | number;\n\nexport interface EBML {\n version?: number;\n readVersion?: number;\n maxIDLength?: number;\n maxSizeWidth?: number;\n docType?: string;\n docTypeVersion?: number;\n docTypeReadVersion?: number;\n}\n\nexport interface Seek {\n position?: number;\n}\n\nexport type SeekHead = Seek[];\n\nexport interface Info {\n duration?: number;\n muxingApp?: string;\n writingApp?: string;\n}\n\nexport type Tracks = TracksEntry[];\n\nexport interface TracksEntry {\n trackNumber?: number;\n trackType?: number;\n codecID?: string;\n audio?: Audio;\n}\n\nexport interface Audio {\n rate?: number;\n channels?: number;\n bitDepth?: number;\n}\n\nexport interface CuePoint {\n time?: number;\n track?: number;\n position?: number;\n}\n\nexport type Cues = CuePoint[];\n\nexport interface Cluster {\n time?: number;\n}\n\nexport interface Segment {\n seekHead?: SeekHead;\n info?: Info;\n tracks?: Tracks;\n cues?: Cues;\n cluster?: Cluster;\n}\n\nexport interface ElementsData {\n name: string;\n type: DataType;\n return?: DataReturnType;\n}\n\nexport type ElementsDataType = { [key: string]: ElementsData };\n\nexport const WebmElements: ElementsDataType = {\n '1a45dfa3': { name: 'ebml', type: DataType.master },\n '4286': { name: 'ebmlVersion', type: DataType.uint, return: DataReturn.uint },\n '42f7': { name: 'ebmlReadVersion', type: DataType.uint, return: DataReturn.uint },\n '42f2': { name: 'ebmlMaxIDLength', type: DataType.uint, return: DataReturn.uint },\n '42f3': { name: 'ebmlMaxSizeLength', type: DataType.uint, return: DataReturn.uint },\n '4282': { name: 'docType', type: DataType.string, return: DataReturn.string },\n '4287': { name: 'docTypeVersion', type: DataType.uint, return: DataReturn.uint },\n '4285': { name: 'docTypeReadVersion', type: DataType.uint, return: DataReturn.uint },\n '18538067': { name: 'segment', type: DataType.master },\n '114d9b74': { name: 'seekHead', type: DataType.master },\n '4dbb': { name: 'seek', type: DataType.master },\n '53ab': { name: 'seekId', type: DataType.binary },\n '53ac': { name: 'seekPosition', type: DataType.uint, return: DataReturn.uint },\n '1549a966': { name: 'info', type: DataType.master },\n '4489': { name: 'duration', type: DataType.float, return: DataReturn.float },\n '4d80': { name: 'muxingApp', type: DataType.string, return: DataReturn.string },\n '5741': { name: 'writingApp', type: DataType.string, return: DataReturn.string },\n '1f43b675': { name: 'cluster', type: DataType.master },\n 'e7': { name: 'clusterTimecode', type: DataType.uint, return: DataReturn.uint },\n 'a3': { name: 'simpleBlock', type: DataType.binary },\n '1654ae6b': { name: 'tracks', type: DataType.master },\n 'ae': { name: 'trackEntry', type: DataType.master },\n 'd7': { name: 'trackNumber', type: DataType.uint, return: DataReturn.uint },\n '83': { name: 'trackType', type: DataType.uint, return: DataReturn.uint },\n '86': { name: 'codecID', type: DataType.string, return: DataReturn.string },\n 'e1': { name: 'audio', type: DataType.master },\n 'b5': { name: 'samplingFrequency', type: DataType.float, return: DataReturn.float },\n '9f': { name: 'channels', type: DataType.uint, return: DataReturn.uint },\n '6264': { name: 'bitDepth', type: DataType.uint, return: DataReturn.uint },\n '1c53bb6b': { name: 'cues', type: DataType.master },\n 'bb': { name: 'cuePoint', type: DataType.master },\n 'b3': { name: 'cueTime', type: DataType.uint, return: DataReturn.uint },\n 'b7': { name: 'cueTrackPositions', type: DataType.master },\n 'f7': { name: 'cueTrack', type: DataType.uint, return: DataReturn.uint },\n 'f1': { name: 'cueClusterPosition', type: DataType.uint, return: DataReturn.uint }\n};\n","import { EBML, ElementsData, Segment } from './WebmConstant';\n\nexport class WebmHeader {\n ebml: EBML;\n segment: Segment;\n audioTrack: number;\n\n constructor() {\n this.ebml = {};\n this.segment = {};\n this.audioTrack = -1;\n }\n\n parse(ebmlID: ElementsData, chunk: Buffer) {\n switch (ebmlID.name) {\n case 'ebml':\n this.ebml = {};\n break;\n\n case 'ebmlVersion':\n if (ebmlID.return) this.ebml.version = ebmlID.return(chunk) as number;\n break;\n\n case 'ebmlReadVersion':\n if (ebmlID.return) this.ebml.readVersion = ebmlID.return(chunk) as number;\n break;\n\n case 'ebmlMaxIDLength':\n if (ebmlID.return) this.ebml.maxIDLength = ebmlID.return(chunk) as number;\n break;\n\n case 'ebmlMaxSizeLength':\n if (ebmlID.return) this.ebml.maxSizeWidth = ebmlID.return(chunk) as number;\n break;\n\n case 'docType':\n if (ebmlID.return) {\n const doctype = ebmlID.return(chunk) as string;\n if (doctype !== 'webm') return new Error('This is not a Webm Stream. [ DocType !== webm ]');\n else this.ebml.docType = doctype;\n }\n break;\n\n case 'docTypeVersion':\n if (ebmlID.return) this.ebml.docTypeVersion = ebmlID.return(chunk) as number;\n break;\n\n case 'docTypeReadVersion':\n if (ebmlID.return) this.ebml.docTypeReadVersion = ebmlID.return(chunk) as number;\n break;\n\n case 'segment':\n this.segment = {};\n break;\n\n case 'seekHead':\n this.segment.seekHead = [];\n break;\n\n case 'seekPosition':\n if (ebmlID.return) this.segment.seekHead!.push({ position: ebmlID.return(chunk) as number });\n break;\n\n case 'info':\n this.segment.info = {};\n break;\n\n case 'duration':\n if (ebmlID.return) this.segment.info!.duration = ebmlID.return(chunk) as number;\n break;\n\n case 'muxingApp':\n if (ebmlID.return) this.segment.info!.muxingApp = ebmlID.return(chunk) as string;\n break;\n\n case 'writingApp':\n if (ebmlID.return) this.segment.info!.writingApp = ebmlID.return(chunk) as string;\n break;\n\n case 'cluster':\n this.segment.cluster = {};\n break;\n\n case 'clusterTimecode':\n if (ebmlID.return) this.segment.cluster!.time = ebmlID.return(chunk) as number;\n break;\n\n case 'simpleBlock':\n break;\n\n case 'tracks':\n this.segment.tracks = [];\n break;\n\n case 'trackEntry':\n this.segment.tracks!.push({});\n break;\n\n case 'trackNumber':\n if (ebmlID.return)\n this.segment.tracks![this.segment.tracks!.length - 1].trackNumber = ebmlID.return(chunk) as number;\n break;\n\n case 'trackType':\n if (ebmlID.return) {\n const type = ebmlID.return(chunk) as number;\n if (type === 2) this.audioTrack = this.segment.tracks!.length - 1;\n this.segment.tracks![this.segment.tracks!.length - 1].trackType = type;\n }\n break;\n\n case 'codecID':\n if (ebmlID.return) {\n const codec = ebmlID.return(chunk) as string;\n if (codec !== 'A_OPUS' && this.segment.tracks![this.segment.tracks!.length - 1].trackType === 2)\n return new Error('Audio Codec is not OPUS');\n this.segment.tracks![this.segment.tracks!.length - 1].codecID = codec;\n }\n break;\n\n case 'audio':\n this.segment.tracks![this.segment.tracks!.length - 1].audio = {};\n break;\n\n case 'samplingFrequency':\n if (ebmlID.return)\n this.segment.tracks![this.segment.tracks!.length - 1].audio!.rate = ebmlID.return(chunk) as number;\n break;\n\n case 'channels':\n if (ebmlID.return)\n this.segment.tracks![this.segment.tracks!.length - 1].audio!.channels = ebmlID.return(\n chunk\n ) as number;\n break;\n\n case 'bitDepth':\n if (ebmlID.return)\n this.segment.tracks![this.segment.tracks!.length - 1].audio!.bitDepth = ebmlID.return(\n chunk\n ) as number;\n break;\n\n case 'cues':\n this.segment.cues = [];\n break;\n\n case 'cuePoint':\n this.segment.cues!.push({});\n break;\n\n case 'cueTime':\n if (ebmlID.return)\n this.segment.cues![this.segment.cues!.length - 1].time = ebmlID.return(chunk) as number;\n break;\n\n case 'cueTrack':\n if (ebmlID.return)\n this.segment.cues![this.segment.cues!.length - 1].track = ebmlID.return(chunk) as number;\n break;\n\n case 'cueClusterPosition':\n if (ebmlID.return)\n this.segment.cues![this.segment.cues!.length - 1].position = ebmlID.return(chunk) as number;\n break;\n\n default:\n break;\n }\n }\n}\n","import { IncomingMessage } from 'node:http';\nimport { RequestOptions, request as httpsRequest } from 'node:https';\nimport { URL } from 'node:url';\nimport { createGunzip } from 'node:zlib';\nimport os from 'node:os';\nimport fs from 'fs';\nimport { resolve } from 'node:path';\nimport { spawn } from 'node:child_process';\nimport { Readable } from 'node:stream';\nimport process from 'node:process';\n\n\nlet FFMPEG_COMMAND: string | undefined = undefined\n\ninterface FFmpegDownloadOptions {\n path?: string;\n debug?: boolean;\n force?: boolean;\n}\n\ninterface FFmpegOptions {\n input?: string | Readable;\n args?: string[];\n}\n\nexport async function ffmpeg(options: FFmpegOptions = {}) {\n const platform = os.platform()\n let args = options.args || [];\n args.unshift('-i', typeof options.input === 'string' ? options.input : '-');\n \n if (!FFMPEG_COMMAND)\n throw new Error(\n 'You forgot to initialize FFMPEG. Try using await initializeFFmpeg() before using this function.'\n );\n let command = FFMPEG_COMMAND\n if (FFMPEG_COMMAND === 'npx') args.unshift(`ffmpeg${platform === \"win32\" ? \".exe\" : ''}`);\n\n args.push('pipe:1');\n const ffmpegprocess = spawn(command, args, { shell: true, windowsHide: true });\n if (options.input instanceof Readable) options.input.pipe(ffmpegprocess.stdin)\n return ffmpegprocess.stdout;\n}\n\nexport async function ffmpeg_download(options: FFmpegDownloadOptions = {}) {\n if (!options.path) options.path = './node_modules/.bin/';\n if (fs.existsSync(options.path)) fs.mkdirSync(options.path, { recursive: true });\n\n const arch = os.arch();\n const platform = os.platform();\n\n const real_path = resolve(options.path, `ffmpeg${platform === \"win32\" ? \".exe\" : ''}`);\n if (fs.existsSync(real_path) && !options.force) {\n process.stdout.write(`You already have ffmpeg installed at ${real_path}\\n`);\n return;\n }\n let response = await https_getter('https://github.com/play-dl/play-audio/releases/latest');\n const release_id = response.headers.location?.split('tag/')[1];\n\n response = await https_getter(\n `https://github.com/play-dl/play-audio/releases/download/${release_id}/ffmpeg-${platform}-${arch}.${\n platform === 'win32' ? 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ffmpeg_download, ffmpeg, initializeFFmpeg };\n\nexport default {\n OpusDecoder,\n OggDemuxer,\n OpusEncoder,\n WebmDemuxer,\n WebmHeader,\n WebmElements,\n ffmpeg_download,\n ffmpeg,\n 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