/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { AxiosPromise } from 'axios';
import { GoogleApis } from '../..';
import { BodyResponseCallback, GlobalOptions, MethodOptions } from '../../lib/api';
/**
 * Cloud Text-to-Speech API
 *
 * Synthesizes natural-sounding speech by applying powerful neural network
 * models.
 *
 * @example
 * const google = require('googleapis');
 * const texttospeech = google.texttospeech('v1beta1');
 *
 * @namespace texttospeech
 * @type {Function}
 * @version v1beta1
 * @variation v1beta1
 * @param {object=} options Options for Texttospeech
 */
export declare class Texttospeech {
    _options: GlobalOptions;
    google: GoogleApis;
    root: this;
    text: Resource$Text;
    voices: Resource$Voices;
    constructor(options: GlobalOptions, google: GoogleApis);
    getRoot(): this;
}
/**
 * Description of audio data to be synthesized.
 */
export interface Schema$AudioConfig {
    /**
     * Required. The format of the requested audio byte stream.
     */
    audioEncoding: string;
    /**
     * Optional speaking pitch, in the range [-20.0, 20.0]. 20 means increase 20
     * semitones from the original pitch. -20 means decrease 20 semitones from the
     * original pitch.
     */
    pitch: number;
    /**
     * The synthesis sample rate (in hertz) for this audio. Optional.  If this is
     * different from the voice's natural sample rate, then the synthesizer
     * will honor this request by converting to the desired sample rate (which
     * might result in worse audio quality), unless the specified sample rate is
     * not supported for the encoding chosen, in which case it will fail the
     * request and return google.rpc.Code.INVALID_ARGUMENT.
     */
    sampleRateHertz: number;
    /**
     * Optional speaking rate/speed, in the range [0.25, 4.0]. 1.0 is the normal
     * native speed supported by the specific voice. 2.0 is twice as fast, and 0.5
     * is half as fast. If unset(0.0), defaults to the native 1.0 speed. Any other
     * values < 0.25 or > 4.0 will return an error.
     */
    speakingRate: number;
    /**
     * Optional volume gain (in dB) of the normal native volume supported by the
     * specific voice, in the range [-96.0, 16.0]. If unset, or set to a value of
     * 0.0 (dB), will play at normal native signal amplitude. A value of -6.0 (dB)
     * will play at approximately half the amplitude of the normal native signal
     * amplitude. A value of +6.0 (dB) will play at approximately twice the
     * amplitude of the normal native signal amplitude. Strongly recommend not to
     * exceed +10 (dB) as there's usually no effective increase in loudness
     * for any value greater than that.
     */
    volumeGainDb: number;
}
/**
 * The message returned to the client by the `ListVoices` method.
 */
export interface Schema$ListVoicesResponse {
    /**
     * The list of voices.
     */
    voices: Schema$Voice[];
}
/**
 * Contains text input to be synthesized. Either `text` or `ssml` must be
 * supplied. Supplying both or neither returns google.rpc.Code.INVALID_ARGUMENT.
 * The input size is limited to 5000 characters.
 */
export interface Schema$SynthesisInput {
    /**
     * The SSML document to be synthesized. The SSML document must be valid and
     * well-formed. Otherwise the RPC will fail and return
     * google.rpc.Code.INVALID_ARGUMENT. For more information, see
     * [SSML](/speech/text-to-speech/docs/ssml).
     */
    ssml: string;
    /**
     * The raw text to be synthesized.
     */
    text: string;
}
/**
 * The top-level message sent by the client for the `SynthesizeSpeech` method.
 */
export interface Schema$SynthesizeSpeechRequest {
    /**
     * Required. The configuration of the synthesized audio.
     */
    audioConfig: Schema$AudioConfig;
    /**
     * Required. The Synthesizer requires either plain text or SSML as input.
     */
    input: Schema$SynthesisInput;
    /**
     * Required. The desired voice of the synthesized audio.
     */
    voice: Schema$VoiceSelectionParams;
}
/**
 * The message returned to the client by the `SynthesizeSpeech` method.
 */
export interface Schema$SynthesizeSpeechResponse {
    /**
     * The audio data bytes encoded as specified in the request, including the
     * header (For LINEAR16 audio, we include the WAV header). Note: as with all
     * bytes fields, protobuffers use a pure binary representation, whereas JSON
     * representations use base64.
     */
    audioContent: string;
}
/**
 * Description of a voice supported by the TTS service.
 */
export interface Schema$Voice {
    /**
     * The languages that this voice supports, expressed as
     * [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tags (e.g.
     * "en-US", "es-419", "cmn-tw").
     */
    languageCodes: string[];
    /**
     * The name of this voice.  Each distinct voice has a unique name.
     */
    name: string;
    /**
     * The natural sample rate (in hertz) for this voice.
     */
    naturalSampleRateHertz: number;
    /**
     * The gender of this voice.
     */
    ssmlGender: string;
}
/**
 * Description of which voice to use for a synthesis request.
 */
export interface Schema$VoiceSelectionParams {
    /**
     * The language (and optionally also the region) of the voice expressed as a
     * [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag, e.g.
     * "en-US". Required. This should not include a script tag (e.g. use
     * "cmn-cn" rather than "cmn-Hant-cn"), because the script
     * will be inferred from the input provided in the SynthesisInput.  The TTS
     * service will use this parameter to help choose an appropriate voice.  Note
     * that the TTS service may choose a voice with a slightly different language
     * code than the one selected; it may substitute a different region (e.g.
     * using en-US rather than en-CA if there isn't a Canadian voice
     * available), or even a different language, e.g. using "nb"
     * (Norwegian Bokmal) instead of "no" (Norwegian)".
     */
    languageCode: string;
    /**
     * The name of the voice. Optional; if not set, the service will choose a
     * voice based on the other parameters such as language_code and gender.
     */
    name: string;
    /**
     * The preferred gender of the voice. Optional; if not set, the service will
     * choose a voice based on the other parameters such as language_code and
     * name. Note that this is only a preference, not requirement; if a voice of
     * the appropriate gender is not available, the synthesizer should substitute
     * a voice with a different gender rather than failing the request.
     */
    ssmlGender: string;
}
export declare class Resource$Text {
    root: Texttospeech;
    constructor(root: Texttospeech);
    getRoot(): Texttospeech;
    /**
     * texttospeech.text.synthesize
     * @desc Synthesizes speech synchronously: receive results after all text
     * input has been processed.
     * @alias texttospeech.text.synthesize
     * @memberOf! ()
     *
     * @param {object} params Parameters for request
     * @param {().SynthesizeSpeechRequest} params.resource Request body data
     * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
     * @param {callback} callback The callback that handles the response.
     * @return {object} Request object
     */
    synthesize(params?: any, options?: MethodOptions): AxiosPromise<Schema$SynthesizeSpeechResponse>;
    synthesize(params?: any, options?: MethodOptions | BodyResponseCallback<Schema$SynthesizeSpeechResponse>, callback?: BodyResponseCallback<Schema$SynthesizeSpeechResponse>): void;
}
export declare class Resource$Voices {
    root: Texttospeech;
    constructor(root: Texttospeech);
    getRoot(): Texttospeech;
    /**
     * texttospeech.voices.list
     * @desc Returns a list of Voice supported for synthesis.
     * @alias texttospeech.voices.list
     * @memberOf! ()
     *
     * @param {object} params Parameters for request
     * @param {string=} params.languageCode Optional (but recommended) [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt) language tag. If specified, the ListVoices call will only return voices that can be used to synthesize this language_code. E.g. when specifying "en-NZ", you will get supported "en-*" voices; when specifying "no", you will get supported "no-*" (Norwegian) and "nb-*" (Norwegian Bokmal) voices; specifying "zh" will also get supported "cmn-*" voices; specifying "zh-hk" will also get supported "yue-*" voices.
     * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
     * @param {callback} callback The callback that handles the response.
     * @return {object} Request object
     */
    list(params?: any, options?: MethodOptions): AxiosPromise<Schema$ListVoicesResponse>;
    list(params?: any, options?: MethodOptions | BodyResponseCallback<Schema$ListVoicesResponse>, callback?: BodyResponseCallback<Schema$ListVoicesResponse>): void;
}