/**

* Copyright 2017, Google, Inc.

* 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.

*/

'use strict';

// [START speech_quickstart]

// Imports the Google Cloud client library

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

const fs = require('fs');

// Your Google Cloud Platform project ID

const projectId = 'your-project-id';

// Instantiates a client

const speechClient = Speech({

projectId: projectId

});

// The name of the audio file to transcribe

const fileName = './resources/audio.raw';

// Reads a local audio file and converts it to base64

const file = fs.readFileSync(fileName);

const audioBytes = file.toString('base64');

// The audio file's encoding, sample rate in hertz, and BCP-47 language code

const audio = {

content: audioBytes

};

const config = {

encoding: 'LINEAR16',

sampleRateHertz: 16000,

languageCode: 'en-US'

};

const request = {

audio: audio,

config: config

};

// Detects speech in the audio file

speechClient.recognize(request)

.then((data) => {

const response = data[0];

const transcription = response.results.map(result =>

result.alternatives[0].transcript).join('\n');

console.log(`Transcription: ${transcription}`);

})

.catch((err) => {

console.error('ERROR:', err);

});

// [END speech_quickstart]