@hahnpro/ms-speech-sdk/distrib/lib/src/common.browser/FileAudioSource.d.ts.map

Microsoft Cognitive Services Speech SDK for JavaScript

{"version":3,"sources":["src/common.browser/FileAudioSource.ts"],"names":[],"mappings":";AAGA,OAAO,EAEH,wBAAwB,EAE3B,MAAM,6BAA6B,CAAC;AACrC,OAAO,EAEH,gBAAgB,EAYhB,WAAW,EACX,YAAY,EACZ,gBAAgB,EAInB,MAAM,sBAAsB,CAAC;AAC9B,OAAO,EAAqB,qBAAqB,EAAE,MAAM,mCAAmC,CAAC;AAE7F,qBAAa,eAAgB,YAAW,YAAY;IAEhD,OAAO,CAAC,sBAAsB,CAAiC;IAE/D,OAAO,CAAC,WAAW,CAA8C;IAEjE,OAAO,CAAC,MAAM,CAAS;IAEvB,OAAO,CAAC,UAAU,CAAgC;IAElD,OAAO,CAAC,UAAU,CAAgB;IAElC,OAAO,CAAC,YAAY,CAAS;IAE7B,OAAO,CAAC,aAAa,CAAc;gBAEhB,IAAI,EAAE,IAAI,GAAG,MAAM,EAAE,QAAQ,CAAC,EAAE,MAAM,EAAE,aAAa,CAAC,EAAE,MAAM;IAcjF,IAAW,MAAM,IAAI,OAAO,CAAC,qBAAqB,CAAC,CAElD;IAEM,MAAM,IAAI,OAAO,CAAC,IAAI,CAAC;IAYvB,EAAE,IAAI,MAAM;IAIN,MAAM,CAAC,WAAW,EAAE,MAAM,GAAG,OAAO,CAAC,gBAAgB,CAAC;IAkB5D,MAAM,CAAC,WAAW,EAAE,MAAM,GAAG,IAAI;IAQjC,OAAO,IAAI,OAAO,CAAC,IAAI,CAAC;IAc/B,IAAW,MAAM,IAAI,WAAW,CAAC,gBAAgB,CAAC,CAEjD;IAED,IAAW,UAAU,IAAI,OAAO,CAAC,wBAAwB,CAAC,CAmBzD;IAED,OAAO,CAAC,UAAU;YAyDJ,MAAM;IAkDpB,OAAO,CAAC,OAAO;CAIlB","file":"FileAudioSource.d.ts","sourcesContent":["// Copyright (c) Microsoft Corporation. All rights reserved.\n// Licensed under the MIT license.\n\nimport {\n    connectivity,\n    ISpeechConfigAudioDevice,\n    type,\n} from \"../common.speech/Exports.js\";\nimport {\n    AudioSourceErrorEvent,\n    AudioSourceEvent,\n    AudioSourceInitializingEvent,\n    AudioSourceOffEvent,\n    AudioSourceReadyEvent,\n    AudioStreamNodeAttachedEvent,\n    AudioStreamNodeAttachingEvent,\n    AudioStreamNodeDetachedEvent,\n    AudioStreamNodeErrorEvent,\n    ChunkedArrayBufferStream,\n    createNoDashGuid,\n    Deferred,\n    Events,\n    EventSource,\n    IAudioSource,\n    IAudioStreamNode,\n    IStreamChunk,\n    IStringDictionary,\n    Stream,\n} from \"../common/Exports.js\";\nimport { AudioStreamFormat, AudioStreamFormatImpl } from \"../sdk/Audio/AudioStreamFormat.js\";\n\nexport class FileAudioSource implements IAudioSource {\n\n    private privAudioFormatPromise: Promise<AudioStreamFormatImpl>;\n\n    private privStreams: IStringDictionary<Stream<ArrayBuffer>> = {};\n\n    private privId: string;\n\n    private privEvents: EventSource<AudioSourceEvent>;\n\n    private privSource: Blob | Buffer;\n\n    private privFilename: string;\n\n    private privHeaderEnd: number = 44;\n\n    public constructor(file: File | Buffer, filename?: string, audioSourceId?: string) {\n        this.privId = audioSourceId ? audioSourceId : createNoDashGuid();\n        this.privEvents = new EventSource<AudioSourceEvent>();\n        this.privSource = file;\n        if (typeof window !== \"undefined\" && typeof Blob !== \"undefined\" && this.privSource instanceof Blob) {\n            this.privFilename = (file as File).name;\n        } else {\n            this.privFilename = filename || \"unknown.wav\";\n        }\n\n        // Read the header.\n        this.privAudioFormatPromise = this.readHeader();\n    }\n\n    public get format(): Promise<AudioStreamFormatImpl> {\n        return this.privAudioFormatPromise;\n    }\n\n    public turnOn(): Promise<void> {\n        if (this.privFilename.lastIndexOf(\".wav\") !== this.privFilename.length - 4) {\n            const errorMsg = this.privFilename + \" is not supported. Only WAVE files are allowed at the moment.\";\n            this.onEvent(new AudioSourceErrorEvent(errorMsg, \"\"));\n            return Promise.reject(errorMsg);\n        }\n\n        this.onEvent(new AudioSourceInitializingEvent(this.privId)); // no stream id\n        this.onEvent(new AudioSourceReadyEvent(this.privId));\n        return;\n    }\n\n    public id(): string {\n        return this.privId;\n    }\n\n    public async attach(audioNodeId: string): Promise<IAudioStreamNode> {\n        this.onEvent(new AudioStreamNodeAttachingEvent(this.privId, audioNodeId));\n\n        const stream: Stream<ArrayBuffer> = await this.upload(audioNodeId);\n\n        this.onEvent(new AudioStreamNodeAttachedEvent(this.privId, audioNodeId));\n        return Promise.resolve({\n            detach: async (): Promise<void> => {\n                stream.readEnded();\n                delete this.privStreams[audioNodeId];\n                this.onEvent(new AudioStreamNodeDetachedEvent(this.privId, audioNodeId));\n                await this.turnOff();\n            },\n            id: (): string => audioNodeId,\n            read: (): Promise<IStreamChunk<ArrayBuffer>> => stream.read(),\n        });\n    }\n\n    public detach(audioNodeId: string): void {\n        if (audioNodeId && this.privStreams[audioNodeId]) {\n            this.privStreams[audioNodeId].close();\n            delete this.privStreams[audioNodeId];\n            this.onEvent(new AudioStreamNodeDetachedEvent(this.privId, audioNodeId));\n        }\n    }\n\n    public turnOff(): Promise<void> {\n        for (const streamId in this.privStreams) {\n            if (streamId) {\n                const stream = this.privStreams[streamId];\n                if (stream && !stream.isClosed) {\n                    stream.close();\n                }\n            }\n        }\n\n        this.onEvent(new AudioSourceOffEvent(this.privId)); // no stream now\n        return Promise.resolve();\n    }\n\n    public get events(): EventSource<AudioSourceEvent> {\n        return this.privEvents;\n    }\n\n    public get deviceInfo(): Promise<ISpeechConfigAudioDevice> {\n        return this.privAudioFormatPromise.then<ISpeechConfigAudioDevice>((result: AudioStreamFormatImpl): Promise<{\n            bitspersample: number;\n            channelcount: number;\n            connectivity: connectivity.Unknown;\n            manufacturer: string;\n            model: string;\n            samplerate: number;\n            type: type.File;\n        }> => ( Promise.resolve({\n                bitspersample: result.bitsPerSample,\n                channelcount: result.channels,\n                connectivity: connectivity.Unknown,\n                manufacturer: \"Speech SDK\",\n                model: \"File\",\n                samplerate: result.samplesPerSec,\n                type: type.File,\n            })\n        ));\n    }\n\n    private readHeader(): Promise<AudioStreamFormatImpl> {\n        // Read the wave header.\n        const maxHeaderSize: number = 4296;\n        const header: Blob | Buffer = this.privSource.slice(0, maxHeaderSize);\n\n        const headerResult: Deferred<AudioStreamFormatImpl> = new Deferred<AudioStreamFormatImpl>();\n\n        const processHeader = (header: ArrayBuffer): void => {\n            const view: DataView = new DataView(header);\n\n            const getWord = (index: number): string => String.fromCharCode(view.getUint8(index), view.getUint8(index + 1), view.getUint8(index + 2), view.getUint8(index + 3));\n\n            // RIFF 4 bytes.\n            if (\"RIFF\" !== getWord(0)) {\n                headerResult.reject(\"Invalid WAV header in file, RIFF was not found\");\n                return;\n            }\n\n            // length, 4 bytes\n            // RIFF Type & fmt 8 bytes\n            if (\"WAVE\" !== getWord(8) || \"fmt \" !== getWord(12)) {\n                headerResult.reject(\"Invalid WAV header in file, WAVEfmt was not found\");\n                return;\n            }\n\n            const formatSize: number = view.getInt32(16, true);\n            const channelCount: number = view.getUint16(22, true);\n            const sampleRate: number = view.getUint32(24, true);\n            const bitsPerSample: number = view.getUint16(34, true);\n            // Confirm if header is 44 bytes long.\n            let pos: number = 36 + Math.max(formatSize - 16, 0);\n            for (; getWord(pos) !== \"data\"; pos += 2) {\n                if (pos > maxHeaderSize - 8) {\n                    headerResult.reject(\"Invalid WAV header in file, data block was not found\");\n                    return;\n                }\n            }\n            this.privHeaderEnd = pos + 8;\n            headerResult.resolve(AudioStreamFormat.getWaveFormatPCM(sampleRate, bitsPerSample, channelCount) as AudioStreamFormatImpl);\n        };\n\n        if (typeof window !== \"undefined\" && typeof Blob !== \"undefined\" && header instanceof Blob) {\n            const reader: FileReader = new FileReader();\n\n            reader.onload = (event: Event): void => {\n                const header: ArrayBuffer = (event.target as FileReader).result as ArrayBuffer;\n                processHeader(header);\n            };\n\n            reader.readAsArrayBuffer(header);\n        } else {\n            const h: Buffer = header as Buffer;\n            processHeader(h.buffer.slice(h.byteOffset, h.byteOffset + h.byteLength));\n        }\n        return headerResult.promise;\n    }\n\n    private async upload(audioNodeId: string): Promise<Stream<ArrayBuffer>> {\n        const onerror = (error: string): void => {\n            const errorMsg = `Error occurred while processing '${this.privFilename}'. ${error}`;\n            this.onEvent(new AudioStreamNodeErrorEvent(this.privId, audioNodeId, errorMsg));\n            throw new Error(errorMsg);\n        };\n\n        try {\n            await this.turnOn();\n\n            const format: AudioStreamFormatImpl = await this.privAudioFormatPromise;\n            const stream = new ChunkedArrayBufferStream(format.avgBytesPerSec / 10, audioNodeId);\n\n            this.privStreams[audioNodeId] = stream;\n            const chunk: Blob | Buffer = this.privSource.slice(this.privHeaderEnd);\n\n            const processFile = (buff: ArrayBuffer): void => {\n                if (stream.isClosed) {\n                    return; // output stream was closed (somebody called TurnOff). We're done here.\n                }\n\n                stream.writeStreamChunk({\n                    buffer: buff,\n                    isEnd: false,\n                    timeReceived: Date.now(),\n                });\n                stream.close();\n            };\n\n            if (typeof window !== \"undefined\" && typeof Blob !== \"undefined\" && chunk instanceof Blob) {\n                const reader: FileReader = new FileReader();\n                reader.onerror = (ev: ProgressEvent<FileReader>): void  =>  onerror(ev.toString());\n\n                reader.onload = (event: Event): void => {\n                    const fileBuffer: ArrayBuffer = (event.target as FileReader).result as ArrayBuffer;\n                    processFile(fileBuffer);\n                };\n\n                reader.readAsArrayBuffer(chunk);\n            } else {\n                const c: Buffer = chunk as Buffer;\n                processFile(c.buffer.slice(c.byteOffset, c.byteOffset + c.byteLength));\n            }\n\n            return stream;\n        } catch (e) {\n            onerror(e as string);\n        }\n    }\n\n    private onEvent(event: AudioSourceEvent): void {\n        this.privEvents.onEvent(event);\n        Events.instance.onEvent(event);\n    }\n}\n"]}