@euirim/microsoft-cognitiveservices-speech-sdk/distrib/es2015/src/sdk/Audio/AudioOutputStream.js

Microsoft Cognitive Services Speech SDK for JavaScript

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
import { createNoDashGuid } from "../../../src/common/Guid";
import { ChunkedArrayBufferStream, PromiseHelper, } from "../../common/Exports";
import { AudioStreamFormatImpl } from "./AudioStreamFormat";
export const bufferSize = 4096;
/**
 * Represents audio input stream used for custom audio input configurations.
 * @class AudioInputStream
 */
export class AudioOutputStream {
    /**
     * Creates and initializes an instance.
     * @constructor
     */
    constructor() { }
    /**
     * Creates a memory backed PullAudioOutputStream with the specified audio format.
     * @member AudioInputStream.createPullStream
     * @function
     * @public
     * @param {AudioStreamFormat} format - The audio data format in which audio will be
     *        written to the push audio stream's write() method (currently only support 16 kHz 16bit mono PCM).
     * @returns {PullAudioOutputStream} The audio input stream being created.
     */
    static createPullStream(format) {
        return PullAudioOutputStream.create(format);
    }
}
/**
 * Represents memory backed push audio input stream used for custom audio input configurations.
 * @class PullAudioOutputStream
 */
// tslint:disable-next-line:max-classes-per-file
export class PullAudioOutputStream extends AudioOutputStream {
    /**
     * Creates a memory backed PullAudioOutputStream with the specified audio format.
     * @member PullAudioOutputStream.create
     * @function
     * @public
     * @param {AudioStreamFormat} format - The audio data format in which audio will be written to the
     *        push audio stream's write() method (currently only support 16 kHz 16bit mono PCM).
     * @returns {PullAudioOutputStream} The push audio input stream being created.
     */
    static create(format) {
        return new PullAudioOutputStreamImpl(bufferSize, format);
    }
}
/**
 * Represents memory backed push audio input stream used for custom audio input configurations.
 * @private
 * @class PullAudioOutputStreamImpl
 */
// tslint:disable-next-line:max-classes-per-file
export class PullAudioOutputStreamImpl extends PullAudioOutputStream {
    /**
     * Creates and initalizes an instance with the given values.
     * @constructor
     * @param {AudioStreamFormat} format - The audio stream format.
     */
    constructor(chunkSize, format) {
        super();
        if (format === undefined) {
            this.privFormat = AudioStreamFormatImpl.getDefaultInputFormat();
        }
        else {
            this.privFormat = format;
        }
        this.privId = createNoDashGuid();
        this.privStream = new ChunkedArrayBufferStream(chunkSize);
        this.streamReader = this.privStream.getReader();
    }
    /**
     * Format information for the audio
     */
    get format() {
        return this.privFormat;
    }
    /**
     * Checks if the stream is closed
     * @member PullAudioOutputStreamImpl.prototype.isClosed
     * @property
     * @public
     */
    get isClosed() {
        return this.privStream.isClosed;
    }
    /**
     * Gets the id of the stream
     * @member PullAudioOutputStreamImpl.prototype.id
     * @property
     * @public
     */
    get id() {
        return this.privId;
    }
    /**
     * Reads data from the buffer
     * @member PullAudioOutputStreamImpl.prototype.read
     * @function
     * @public
     * @param {ArrayBuffer} dataBuffer - The audio buffer of which this function will make a copy.
     */
    read() {
        return this.streamReader.read()
            .onSuccessContinueWithPromise((chunk) => {
            return PromiseHelper.fromResult(chunk.buffer);
        });
    }
    /**
     * Writes the audio data specified by making an internal copy of the data.
     * @member PullAudioOutputStreamImpl.prototype.write
     * @function
     * @public
     * @param {ArrayBuffer} dataBuffer - The audio buffer of which this function will make a copy.
     */
    write(dataBuffer) {
        this.privStream.writeStreamChunk({
            buffer: dataBuffer,
            isEnd: false,
            timeReceived: Date.now()
        });
    }
    /**
     * Closes the stream.
     * @member PullAudioOutputStreamImpl.prototype.close
     * @function
     * @public
     */
    close() {
        this.privStream.close();
    }
}

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