miguelmota / Alexa Voice Service.js
Licence: mit
Library for interacting with Alexa Voice Service (AVS) in the browser.
Stars: ✭ 123
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alexa-voice-service.js
Library for interacting with Alexa Voice Service (AVS) in the browser.
Things you can do
Things you can do with this library:
- Login with Amazon and get access token
- Get access token and refresh token from 'code' response type
- Get access token from refresh token
- Request user microphone
- Record user audio using microphone
- Send user audio to AVS
- Parse response from AVS
- Queue and play MP3 responses from AVS.
The audio recorded in this library is mono channel, sampled at 16k Hz, and signed 16 bit PCM encoding which is required by AVS.
Demo
https://lab.miguelmota.com/alexa-voice-service
Install
npm install alexa-voice-service
Example
Follow these steps to run demo locally:
- Git clone this repo
git clone [email protected]:miguelmota/alexa-voice-service.js.git
cd alexa-voice-service.js/example/
- Install NPM Modules
npm install
- Run HTTPS server
npm start
- Go to browser url.
open https://localhost:9745
More info in the example README.
Usage
const AVS = require('alexa-voice-service');
const avs = new AVS(options);
Please check out example as noted above.
Documentation
Most methods return a promise.
AVS(options) - constructor
options:
debug - {boolean} logs to console
clientId - {string} AVS client id found in portal
clientSecret - {string} AVS client secret found in portal. Only needed if using `code` response type.
deviceId - {string} AVS device Id found in portal
deviceSerialNumber - {number} serial number for this device (can be made up)
redirectUri - {string} redirect uri set in portal
avs.login({responseType: 'code, token (default)', newWindow: false}) -> promise(response);
avs.promptUserLogin() -> alias to login();
avs.logout() -> promise();
avs.getTokenFromUrl() -> promise(token);
avs.getCodeFromUrl() -> promise(code);
avs.getTokenFromCode(code) -> promise(response);
avs.getTokenFromRefreshToken(refreshToken) -> promise(token)
avs.refreshToken() -> promise({token, refreshToken})
avs.getToken() -> promise(token)
avs.getRefreshToken() -> promise(refreshToken)
avs.requestMic() -> promise(stream);
avs.connectMediaStream(stream) -> promise;
avs.stopRecording() -> promise;
avs.startRecording() -> promise;
avs.sendAudio(dataView) -> promise(response); - send audio to AVS and get back an object containing response.
The response object is the parsed http message.
avs.audioToBlob(AudioBuffer | DataView) -> promise(blob) - mp3 blob
avs.on(identifier, callback)
identifiers (found under AVS.EventTypes object)
LOG - when a log occurs.
ERROR - when an error occurs.
LOGIN - when user is logged in.
LOGOUT - when user is logged out.
RECORD_START - when recording is started.
RECORD_STOP - when recording is stopped.
TOKEN_SET - when token is set.
REFRESH_TOKEN_SET - when refresh token is set.
TOKEN_INVALID - when token is invalid, usually because it is expired.
example: avs.on(AVS.EventTypes.LOG, callback)
// Player
avs.player.enqueue(dataView|typedArray|arrayBuffer|url) -> promise(arraybuffer) - add an audio source to play queue. Converts input to AudioBuffer.
avs.player.deque() -> promise() - dequeu an audio source to play
avs.player.play() -> promise() - play next source in queue
avs.player.stop() -> promise() - stop playing
avs.player.replay() -> promise() - replay last audio source played
avs.player.pause() -> promise() - pause playing
avs.player.emptyQueue() -> promise() - empty the queue
avs.player.playBlob(blob) -> promise(blob) - play a blob source
avs.player.playAudioBuffer(audioBuffer) -> promise() - play an AudioBuffer source
avs.player.playUrl(url) -> promise(url) - play mp3 url
avs.player.on(identifier, callback)
identifiers (found under AVS.Player.EventTypes object)
LOG - when a debug log occurs
ERROR - when an error occurs
PLAY - when audio source is played
REPLAY - when audio source is replayed
PAUSE - when audio source is paused
STOP - when audio source is stopped playing
ENQUEUE - when an audio source is added to queue
DEQUE - when an audio source is removed from queue
Resources
License
MIT
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