@hahnpro/ms-speech-sdk/distrib/lib/src/sdk/Audio/AudioOutputFormat.d.ts.map

Microsoft Cognitive Services Speech SDK for JavaScript

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All rights reserved.\n// Licensed under the MIT license.\n\nimport { INumberDictionary } from \"../../common/Exports.js\";\nimport { SpeechSynthesisOutputFormat } from \"../SpeechSynthesisOutputFormat.js\";\nimport { AudioFormatTag, AudioStreamFormatImpl } from \"./AudioStreamFormat.js\";\n\n/**\n * @private\n * @class AudioOutputFormatImpl\n * Updated in version 1.17.0\n */\n// eslint-disable-next-line max-classes-per-file\nexport class AudioOutputFormatImpl extends AudioStreamFormatImpl {\n    public static SpeechSynthesisOutputFormatToString: INumberDictionary<string> = {\n        [SpeechSynthesisOutputFormat.Raw8Khz8BitMonoMULaw]: \"raw-8khz-8bit-mono-mulaw\",\n        [SpeechSynthesisOutputFormat.Riff16Khz16KbpsMonoSiren]: \"riff-16khz-16kbps-mono-siren\",\n        [SpeechSynthesisOutputFormat.Audio16Khz16KbpsMonoSiren]: \"audio-16khz-16kbps-mono-siren\",\n        [SpeechSynthesisOutputFormat.Audio16Khz32KBitRateMonoMp3]: \"audio-16khz-32kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Audio16Khz128KBitRateMonoMp3]: \"audio-16khz-128kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Audio16Khz64KBitRateMonoMp3]: \"audio-16khz-64kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Audio24Khz48KBitRateMonoMp3]: \"audio-24khz-48kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Audio24Khz96KBitRateMonoMp3]: \"audio-24khz-96kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Audio24Khz160KBitRateMonoMp3]: \"audio-24khz-160kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Raw16Khz16BitMonoTrueSilk]: \"raw-16khz-16bit-mono-truesilk\",\n        [SpeechSynthesisOutputFormat.Riff16Khz16BitMonoPcm]: \"riff-16khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Riff8Khz16BitMonoPcm]: \"riff-8khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Riff24Khz16BitMonoPcm]: \"riff-24khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Riff8Khz8BitMonoMULaw]: \"riff-8khz-8bit-mono-mulaw\",\n        [SpeechSynthesisOutputFormat.Raw16Khz16BitMonoPcm]: \"raw-16khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Raw24Khz16BitMonoPcm]: \"raw-24khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Raw8Khz16BitMonoPcm]: \"raw-8khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Ogg16Khz16BitMonoOpus]: \"ogg-16khz-16bit-mono-opus\",\n        [SpeechSynthesisOutputFormat.Ogg24Khz16BitMonoOpus]: \"ogg-24khz-16bit-mono-opus\",\n        [SpeechSynthesisOutputFormat.Raw48Khz16BitMonoPcm]: \"raw-48khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Riff48Khz16BitMonoPcm]: \"riff-48khz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Audio48Khz96KBitRateMonoMp3]: \"audio-48khz-96kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Audio48Khz192KBitRateMonoMp3]: \"audio-48khz-192kbitrate-mono-mp3\",\n        [SpeechSynthesisOutputFormat.Ogg48Khz16BitMonoOpus]: \"ogg-48khz-16bit-mono-opus\",\n        [SpeechSynthesisOutputFormat.Webm16Khz16BitMonoOpus]: \"webm-16khz-16bit-mono-opus\",\n        [SpeechSynthesisOutputFormat.Webm24Khz16BitMonoOpus]: \"webm-24khz-16bit-mono-opus\",\n        [SpeechSynthesisOutputFormat.Webm24Khz16Bit24KbpsMonoOpus]: \"webm-24khz-16bit-24kbps-mono-opus\",\n        [SpeechSynthesisOutputFormat.Raw24Khz16BitMonoTrueSilk]: \"raw-24khz-16bit-mono-truesilk\",\n        [SpeechSynthesisOutputFormat.Raw8Khz8BitMonoALaw]: \"raw-8khz-8bit-mono-alaw\",\n        [SpeechSynthesisOutputFormat.Riff8Khz8BitMonoALaw]: \"riff-8khz-8bit-mono-alaw\",\n        [SpeechSynthesisOutputFormat.Audio16Khz16Bit32KbpsMonoOpus]: \"audio-16khz-16bit-32kbps-mono-opus\",\n        [SpeechSynthesisOutputFormat.Audio24Khz16Bit48KbpsMonoOpus]: \"audio-24khz-16bit-48kbps-mono-opus\",\n        [SpeechSynthesisOutputFormat.Audio24Khz16Bit24KbpsMonoOpus]: \"audio-24khz-16bit-24kbps-mono-opus\",\n        [SpeechSynthesisOutputFormat.Raw22050Hz16BitMonoPcm]: \"raw-22050hz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Riff22050Hz16BitMonoPcm]: \"riff-22050hz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Raw44100Hz16BitMonoPcm]: \"raw-44100hz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.Riff44100Hz16BitMonoPcm]: \"riff-44100hz-16bit-mono-pcm\",\n        [SpeechSynthesisOutputFormat.AmrWb16000Hz]: \"amr-wb-16000hz\",\n        [SpeechSynthesisOutputFormat.G72216Khz64Kbps]: \"g722-16khz-64kbps\",\n    };\n    private priAudioFormatString: string;\n    /**\n     * audio format string for synthesis request, which may differ from priAudioFormatString.\n     * e.g. for riff format, we will request raw format and add a header in SDK side.\n     */\n    private readonly priRequestAudioFormatString: string;\n    private readonly priHasHeader: boolean;\n\n    /**\n     * Creates an instance with the given values.\n     * @constructor\n     * @param formatTag\n     * @param {number} channels - Number of channels.\n     * @param {number} samplesPerSec - Samples per second.\n     * @param {number} avgBytesPerSec - Average bytes per second.\n     * @param {number} blockAlign - Block alignment.\n     * @param {number} bitsPerSample - Bits per sample.\n     * @param {string} audioFormatString - Audio format string\n     * @param {string} requestAudioFormatString - Audio format string sent to service.\n     * @param {boolean} hasHeader - If the format has header or not.\n     */\n    public constructor(formatTag: AudioFormatTag,\n                       channels: number,\n                       samplesPerSec: number,\n                       avgBytesPerSec: number,\n                       blockAlign: number,\n                       bitsPerSample: number,\n                       audioFormatString: string,\n                       requestAudioFormatString: string,\n                       hasHeader: boolean) {\n        super(samplesPerSec, bitsPerSample, channels, formatTag);\n        this.formatTag = formatTag;\n        this.avgBytesPerSec = avgBytesPerSec;\n        this.blockAlign = blockAlign;\n        this.priAudioFormatString = audioFormatString;\n        this.priRequestAudioFormatString = requestAudioFormatString;\n        this.priHasHeader = hasHeader;\n    }\n\n    public static fromSpeechSynthesisOutputFormat(speechSynthesisOutputFormat?: SpeechSynthesisOutputFormat): AudioOutputFormatImpl {\n        if (speechSynthesisOutputFormat === undefined) {\n            return AudioOutputFormatImpl.getDefaultOutputFormat();\n        }\n        return AudioOutputFormatImpl.fromSpeechSynthesisOutputFormatString(\n            AudioOutputFormatImpl.SpeechSynthesisOutputFormatToString[speechSynthesisOutputFormat]);\n    }\n\n    public static fromSpeechSynthesisOutputFormatString(speechSynthesisOutputFormatString: string): AudioOutputFormatImpl {\n        switch (speechSynthesisOutputFormatString) {\n            case \"raw-8khz-8bit-mono-mulaw\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MuLaw,\n                    1,\n                    8000,\n                    8000,\n                    1,\n                    8,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"riff-16khz-16kbps-mono-siren\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.Siren,\n                    1,\n                    16000,\n                    2000,\n                    40,\n                    0,\n                    speechSynthesisOutputFormatString,\n                    \"audio-16khz-16kbps-mono-siren\",\n                    true);\n            case \"audio-16khz-16kbps-mono-siren\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.Siren,\n                    1,\n                    16000,\n                    2000,\n                    40,\n                    0,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-16khz-32kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    16000,\n                    32 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-16khz-128kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    16000,\n                    128 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-16khz-64kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    16000,\n                    64 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-24khz-48kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    24000,\n                    48 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-24khz-96kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    24000,\n                    96 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-24khz-160kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    24000,\n                    160 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"raw-16khz-16bit-mono-truesilk\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.SILKSkype,\n                    1,\n                    16000,\n                    32000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n\n            case \"riff-8khz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    8000,\n                    16000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-8khz-16bit-mono-pcm\",\n                    true);\n            case \"riff-24khz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    24000,\n                    48000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-24khz-16bit-mono-pcm\",\n                    true);\n            case \"riff-8khz-8bit-mono-mulaw\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MuLaw,\n                    1,\n                    8000,\n                    8000,\n                    1,\n                    8,\n                    speechSynthesisOutputFormatString,\n                    \"raw-8khz-8bit-mono-mulaw\",\n                    true);\n            case \"raw-16khz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    16000,\n                    32000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-16khz-16bit-mono-pcm\",\n                    false);\n            case \"raw-24khz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    24000,\n                    48000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-24khz-16bit-mono-pcm\",\n                    false);\n            case \"raw-8khz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    8000,\n                    16000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-8khz-16bit-mono-pcm\",\n                    false);\n            case \"ogg-16khz-16bit-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.OGG_OPUS,\n                    1,\n                    16000,\n                    8192,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"ogg-24khz-16bit-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.OGG_OPUS,\n                    1,\n                    24000,\n                    8192,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"raw-48khz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    48000,\n                    96000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-48khz-16bit-mono-pcm\",\n                    false);\n            case \"riff-48khz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    48000,\n                    96000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-48khz-16bit-mono-pcm\",\n                    true);\n            case \"audio-48khz-96kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    48000,\n                    96 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-48khz-192kbitrate-mono-mp3\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.MP3,\n                    1,\n                    48000,\n                    192 << 7,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"ogg-48khz-16bit-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.OGG_OPUS,\n                    1,\n                    48000,\n                    12000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"webm-16khz-16bit-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.WEBM_OPUS,\n                    1,\n                    16000,\n                    4000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"webm-24khz-16bit-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.WEBM_OPUS,\n                    1,\n                    24000,\n                    6000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"webm-24khz-16bit-24kbps-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.WEBM_OPUS,\n                    1,\n                    24000,\n                    3000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-16khz-16bit-32kbps-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.OPUS,\n                    1,\n                    16000,\n                    4000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-24khz-16bit-48kbps-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.OPUS,\n                    1,\n                    24000,\n                    6000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-24khz-16bit-24kbps-mono-opus\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.OPUS,\n                    1,\n                    24000,\n                    3000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-24khz-16bit-mono-flac\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.FLAC,\n                    1,\n                    24000,\n                    24000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"audio-48khz-16bit-mono-flac\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.FLAC,\n                    1,\n                    48000,\n                    30000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"raw-24khz-16bit-mono-truesilk\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.SILKSkype,\n                    1,\n                    24000,\n                    48000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"raw-8khz-8bit-mono-alaw\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.ALaw,\n                    1,\n                    8000,\n                    8000,\n                    1,\n                    8,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"riff-8khz-8bit-mono-alaw\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.ALaw,\n                    1,\n                    8000,\n                    8000,\n                    1,\n                    8,\n                    speechSynthesisOutputFormatString,\n                    \"raw-8khz-8bit-mono-alaw\",\n                    true);\n            case \"raw-22050hz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    22050,\n                    44100,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"riff-22050hz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    22050,\n                    44100,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-22050hz-16bit-mono-pcm\",\n                    true);\n            case \"raw-44100hz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    44100,\n                    88200,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"riff-44100hz-16bit-mono-pcm\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    44100,\n                    88200,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    \"raw-44100hz-16bit-mono-pcm\",\n                    true);\n            case \"amr-wb-16000h\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.AMR_WB,\n                    1,\n                    16000,\n                    3052,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"g722-16khz-64kbps\":\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.G722,\n                    1,\n                    16000,\n                    8000,\n                    2,\n                    16,\n                    speechSynthesisOutputFormatString,\n                    speechSynthesisOutputFormatString,\n                    false);\n            case \"riff-16khz-16bit-mono-pcm\":\n            default:\n                return new AudioOutputFormatImpl(\n                    AudioFormatTag.PCM,\n                    1,\n                    16000,\n                    32000,\n                    2,\n                    16,\n                    \"riff-16khz-16bit-mono-pcm\",\n                    \"raw-16khz-16bit-mono-pcm\",\n                    true);\n        }\n    }\n\n    public static getDefaultOutputFormat(): AudioOutputFormatImpl {\n        return AudioOutputFormatImpl.fromSpeechSynthesisOutputFormatString(\n            (typeof window !== \"undefined\") ? \"audio-24khz-48kbitrate-mono-mp3\" : \"riff-16khz-16bit-mono-pcm\");\n    }\n\n    /**\n     * The format tag of the audio\n     * @AudioFormatTag AudioOutputFormatImpl.prototype.formatTag\n     * @function\n     * @public\n     */\n    public formatTag: AudioFormatTag;\n\n    /**\n     * Specifies if this audio output format has a header\n     * @boolean AudioOutputFormatImpl.prototype.hasHeader\n     * @function\n     * @public\n     */\n    public get hasHeader(): boolean {\n        return this.priHasHeader;\n    }\n\n    /**\n     * Specifies the header of this format\n     * @ArrayBuffer AudioOutputFormatImpl.prototype.header\n     * @function\n     * @public\n     */\n    public get header(): ArrayBuffer {\n        if (this.hasHeader) {\n            return this.privHeader;\n        }\n        return undefined;\n    }\n\n    /**\n     * Updates the header based on the audio length\n     * @member AudioOutputFormatImpl.updateHeader\n     * @function\n     * @public\n     * @param {number} audioLength - the audio length\n     */\n    public updateHeader(audioLength: number): void {\n        if (this.priHasHeader) {\n            const view = new DataView(this.privHeader);\n            view.setUint32(4, audioLength + this.privHeader.byteLength - 8, true);\n            view.setUint32(40, audioLength, true);\n        }\n    }\n\n    /**\n     * Specifies the audio format string to be sent to the service\n     * @string AudioOutputFormatImpl.prototype.requestAudioFormatString\n     * @function\n     * @public\n     */\n    public get requestAudioFormatString(): string {\n        return this.priRequestAudioFormatString;\n    }\n\n    /**\n     * Adds audio header\n     * @param audio the raw audio without header\n     * @returns the audio with header if applicable\n     */\n\n    public addHeader(audio: ArrayBuffer): ArrayBuffer {\n        if (!this.hasHeader) {\n            return audio;\n        }\n        this.updateHeader(audio.byteLength);\n        const tmp = new Uint8Array(audio.byteLength + this.header.byteLength);\n        tmp.set(new Uint8Array(this.header), 0);\n        tmp.set(new Uint8Array(audio), this.header.byteLength);\n        return tmp.buffer;\n    }\n\n}\n"]}