@euirim/microsoft-cognitiveservices-speech-sdk/distrib/es2015/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,EAAE,iBAAiB,EAAyB,MAAM,uCAAuC,CAAC;AACjG,OAAO,EAEH,wBAAwB,EAE3B,MAAM,0BAA0B,CAAC;AAClC,OAAO,EAEH,gBAAgB,EAUhB,WAAW,EACX,YAAY,EACZ,gBAAgB,EAEhB,OAAO,EAIV,MAAM,mBAAmB,CAAC;AAE3B,qBAAa,eAAgB,YAAW,YAAY;IAGhD,OAAO,CAAC,MAAM,CAAC,QAAQ,CAAC,WAAW,CAAqB;IAIxD,OAAO,CAAC,MAAM,CAAC,QAAQ,CAAC,UAAU,CAA+C;IAIjF,OAAO,CAAC,MAAM,CAAC,QAAQ,CAAC,QAAQ,CAAkD;IAElF,OAAO,CAAC,MAAM,CAAC,QAAQ,CAAC,UAAU,CAAoG;IAEtI,OAAO,CAAC,WAAW,CAA8C;IAEjE,OAAO,CAAC,MAAM,CAAS;IAEvB,OAAO,CAAC,UAAU,CAAgC;IAElD,OAAO,CAAC,QAAQ,CAAO;gBAEJ,IAAI,EAAE,IAAI,EAAE,aAAa,CAAC,EAAE,MAAM;aAM1C,MAAM,EAAI,iBAAiB;IAI/B,MAAM,yBAkBZ;IAEM,EAAE,eAER;IAEM,MAAM,qDAqBZ;IAEM,MAAM,gCAMZ;IAEM,OAAO,yBAYb;aAEU,MAAM,EAAI,WAAW,CAAC,gBAAgB,CAAC;aAIvC,UAAU,EAAI,OAAO,CAAC,wBAAwB,CAAC;IAY1D,OAAO,CAAC,MAAM,CA+Cb;IAED,OAAO,CAAC,OAAO,CAGd;CACJ","file":"FileAudioSource.d.ts","sourcesContent":["// Copyright (c) Microsoft Corporation. All rights reserved.\n// Licensed under the MIT license.\n\nimport { AudioStreamFormat, AudioStreamFormatImpl } from \"../../src/sdk/Audio/AudioStreamFormat\";\nimport {\n    connectivity,\n    ISpeechConfigAudioDevice,\n    type,\n} from \"../common.speech/Exports\";\nimport {\n    AudioSourceErrorEvent,\n    AudioSourceEvent,\n    AudioSourceInitializingEvent,\n    AudioSourceOffEvent,\n    AudioSourceReadyEvent,\n    AudioStreamNodeAttachedEvent,\n    AudioStreamNodeAttachingEvent,\n    AudioStreamNodeDetachedEvent,\n    AudioStreamNodeErrorEvent,\n    createNoDashGuid,\n    Events,\n    EventSource,\n    IAudioSource,\n    IAudioStreamNode,\n    IStringDictionary,\n    Promise,\n    PromiseHelper,\n    Stream,\n    StreamReader,\n} from \"../common/Exports\";\n\nexport class FileAudioSource implements IAudioSource {\n\n    // Recommended sample rate (bytes/second).\n    private static readonly SAMPLE_RATE: number = 16000 * 2; // 16 kHz * 16 bits\n\n    // We should stream audio at no faster than 2x real-time (i.e., send five chunks\n    // per second, with the chunk size == sample rate in bytes per second * 2 / 5).\n    private static readonly CHUNK_SIZE: number = FileAudioSource.SAMPLE_RATE * 2 / 5;\n\n    // 10 seconds of audio in bytes =\n    // sample rate (bytes/second) * 600 (seconds) + 44 (size of the wave header).\n    private static readonly MAX_SIZE: number = FileAudioSource.SAMPLE_RATE * 600 + 44;\n\n    private static readonly FILEFORMAT: AudioStreamFormatImpl = AudioStreamFormat.getWaveFormatPCM(16000, 16, 1) as AudioStreamFormatImpl;\n\n    private privStreams: IStringDictionary<Stream<ArrayBuffer>> = {};\n\n    private privId: string;\n\n    private privEvents: EventSource<AudioSourceEvent>;\n\n    private privFile: File;\n\n    public constructor(file: File, audioSourceId?: string) {\n        this.privId = audioSourceId ? audioSourceId : createNoDashGuid();\n        this.privEvents = new EventSource<AudioSourceEvent>();\n        this.privFile = file;\n    }\n\n    public get format(): AudioStreamFormat {\n        return FileAudioSource.FILEFORMAT;\n    }\n\n    public turnOn = (): Promise<boolean> => {\n        if (typeof FileReader === \"undefined\") {\n            const errorMsg = \"Browser does not support FileReader.\";\n            this.onEvent(new AudioSourceErrorEvent(errorMsg, \"\")); // initialization error - no streamid at this point\n            return PromiseHelper.fromError<boolean>(errorMsg);\n        } else if (this.privFile.name.lastIndexOf(\".wav\") !== this.privFile.name.length - 4) {\n            const errorMsg = this.privFile.name + \" is not supported. Only WAVE files are allowed at the moment.\";\n            this.onEvent(new AudioSourceErrorEvent(errorMsg, \"\"));\n            return PromiseHelper.fromError<boolean>(errorMsg);\n        } else if (this.privFile.size > FileAudioSource.MAX_SIZE) {\n            const errorMsg = this.privFile.name + \" exceeds the maximum allowed file size (\" + FileAudioSource.MAX_SIZE + \").\";\n            this.onEvent(new AudioSourceErrorEvent(errorMsg, \"\"));\n            return PromiseHelper.fromError<boolean>(errorMsg);\n        }\n\n        this.onEvent(new AudioSourceInitializingEvent(this.privId)); // no stream id\n        this.onEvent(new AudioSourceReadyEvent(this.privId));\n        return PromiseHelper.fromResult(true);\n    }\n\n    public id = (): string => {\n        return this.privId;\n    }\n\n    public attach = (audioNodeId: string): Promise<IAudioStreamNode> => {\n        this.onEvent(new AudioStreamNodeAttachingEvent(this.privId, audioNodeId));\n\n        return this.upload(audioNodeId).onSuccessContinueWith<IAudioStreamNode>(\n            (streamReader: StreamReader<ArrayBuffer>) => {\n                this.onEvent(new AudioStreamNodeAttachedEvent(this.privId, audioNodeId));\n                return {\n                    detach: () => {\n                        streamReader.close();\n                        delete this.privStreams[audioNodeId];\n                        this.onEvent(new AudioStreamNodeDetachedEvent(this.privId, audioNodeId));\n                        this.turnOff();\n                    },\n                    id: () => {\n                        return audioNodeId;\n                    },\n                    read: () => {\n                        return streamReader.read();\n                    },\n                };\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<boolean> => {\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 PromiseHelper.fromResult(true);\n    }\n\n    public get events(): EventSource<AudioSourceEvent> {\n        return this.privEvents;\n    }\n\n    public get deviceInfo(): Promise<ISpeechConfigAudioDevice> {\n        return PromiseHelper.fromResult({\n            bitspersample: FileAudioSource.FILEFORMAT.bitsPerSample,\n            channelcount: FileAudioSource.FILEFORMAT.channels,\n            connectivity: connectivity.Unknown,\n            manufacturer: \"Speech SDK\",\n            model: \"File\",\n            samplerate: FileAudioSource.FILEFORMAT.samplesPerSec,\n            type: type.File,\n        });\n    }\n\n    private upload = (audioNodeId: string): Promise<StreamReader<ArrayBuffer>> => {\n        return this.turnOn()\n            .onSuccessContinueWith<StreamReader<ArrayBuffer>>((_: boolean) => {\n                const stream = new Stream<ArrayBuffer>(audioNodeId);\n\n                this.privStreams[audioNodeId] = stream;\n\n                const reader: FileReader = new FileReader();\n\n                let startOffset = 0;\n                let endOffset = FileAudioSource.CHUNK_SIZE;\n\n                const processNextChunk = (event: Event): 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: reader.result as ArrayBuffer,\n                        isEnd: false,\n                        timeReceived: Date.now(),\n                    });\n\n                    if (endOffset < this.privFile.size) {\n                        startOffset = endOffset;\n                        endOffset = Math.min(endOffset + FileAudioSource.CHUNK_SIZE, this.privFile.size);\n                        const chunk = this.privFile.slice(startOffset, endOffset);\n                        reader.readAsArrayBuffer(chunk);\n                    } else {\n                        // we've written the entire file to the output stream, can close it now.\n                        stream.close();\n                    }\n                };\n\n                reader.onload = processNextChunk;\n\n                reader.onerror = (event: ProgressEvent) => {\n                    const errorMsg = `Error occurred while processing '${this.privFile.name}'. ${event}`;\n                    this.onEvent(new AudioStreamNodeErrorEvent(this.privId, audioNodeId, errorMsg));\n                    throw new Error(errorMsg);\n                };\n\n                const chunk = this.privFile.slice(startOffset, endOffset);\n                reader.readAsArrayBuffer(chunk);\n\n                return stream.getReader();\n            });\n    }\n\n    private onEvent = (event: AudioSourceEvent): void => {\n        this.privEvents.onEvent(event);\n        Events.instance.onEvent(event);\n    }\n}\n"]}