// Copyright 2021 Google LLC

//

// 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

//

// https://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.

'use strict';

function main(

inputUri,

outputStorageUri,

encoding,

sampleRateHertz,

languageCode,

bucketName,

objectName

) {

// [START speech_export_to_gcs]

/**

* TODO(developer): Uncomment these variables before running the sample.\

* (Not necessary if passing values as arguments)

*/

// const inputUri = 'YOUR_AUDIO_TO_TRANSCRIBE';

// const outputStorageUri = 'YOUR_STORAGE_BUCKET_OUTPUT_URI';

// const encoding = 'ENCODING_OF_AUDIO_FILE';

// const sampleRateHertz = 16000 // Sampling rate;

// const languageCode = 'BCP-47_LANGUAGE_CODE_OF_AUDIO';

// Imports the Speech-to-Text client library

const speech = require('@google-cloud/speech');

const {Storage} = require('@google-cloud/storage');

const fsp = require('fs.promises');

// Creates a client

const speechClient = new speech.SpeechClient();

// Creates a storage client

const storageClient = new Storage();

async function exportTranscriptToStorage() {

const destFileName = 'file.json';

const audio = {

uri: inputUri,

};

// Pass in the URI of the Cloud Storage bucket to hold the transcription

const outputConfig = {

gcsUri: outputStorageUri,

};

const config = {

encoding,

sampleRateHertz,

languageCode,

};

const request = {

config,

audio,

outputConfig,

};

// This creates a recognition job that you can wait for now, or get its result later.

const [operation] = await speechClient.longRunningRecognize(request);

// Get a Promise representation of the final result of the job

await operation.promise();

// Destination file

const options = {

destination: destFileName,

};

// Get bucket with name

await storageClient.bucket(bucketName).file(objectName).download(options);

// Get content as json

const content = JSON.parse((await fsp.readFile(destFileName)).toString());

// Print results

const transcription = content.results

.map(result => result.alternatives[0].transcript)

.join('\n');

console.log('Transcription: ', transcription);

}

exportTranscriptToStorage();

// [END speech_export_to_gcs]

}

process.on('unhandledRejection', err => {

console.error(err.message);

process.exitCode = 1;

});

main(...process.argv.slice(2));