spokestack-react-native

React Native wrapper for the Spokestack speech activity detection/automated speech recognition project.

Getting started

$ npm install spokestack-react-native --save

Mostly automatic installation

$ react-native link spokestack-react-native

Manual installation

Android

1. Open up android/app/src/main/java/[...]/MainApplication.java (could also be called MainActivity.java or similar)

• Add import com.pylon.RNSpokestack.RNSpokestackPackage; to the imports at the top of the file
• Add new RNSpokestackPackage() to the list returned by the getPackages() method

1. Append the following lines to android/settings.gradle:

   include ':spokestack-react-native'
   project(':spokestack-react-native').projectDir = new File(rootProject.projectDir, 	'../node_modules/spokestack-react-native/android')
   

2. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':spokestack-react-native')
   

Gradle Setup

android/app/build.gradle

buildscript {
  repositories {
    mavenLocal()
    mavenCentral()
    jcenter()
  }
  dependencies {
    classpath 'com.nabilhachicha:android-native-dependencies:0.1.2'
  }
}

apply plugin: 'android-native-dependencies'

android {
  compileSdkVersion 26 // miniumum
  defaultConfig {
    multiDexEnabled true
  }
  packagingOptions {
    exclude 'project.properties'
    exclude 'META-INF/INDEX.LIST'
    exclude 'META-INF/io.netty.versions.properties'
    pickFirst 'lib/armeabi-v7a/libspokestack.so'
  }
}

dependencies {
  annotationProcessor 'com.google.auto.value:auto-value:1.2' // spokestack google
  implementation 'io.grpc:grpc-okhttp:1.10.0'    // spokestack google (must replace grpc-netty on android)
  implementation 'com.google.code.gson:gson:2.8.2'
  implementation project(':spokestack-react-native')
}

native_dependencies {
    artifact 'com.pylon:spokestack:0.1.8'
}

android/app/src/main/AndroidManifest.xml

<uses-permission android:name="android.permission.RECORD_AUDIO" />

Usage

Javascript

import RNSpokestack from 'spokestack-react-native'
 
// There are three events that can be bound with callbacks
RNSpokestack.onSpeechStarted = this._onSpeechStart.bind(this)
RNSpokestack.onSpeechRecognized = this._onSpeechRecognized.bind(this)
RNSpokestack.onSpeechEnded = this._onSpeechEnd.bind(this)
 
// initialize the Spokestack pipeline. 
// The pipeline has three required top-level keys: 'input', 'stages', and 'properties'.
// For further examples, see https://github.com/pylon/spokestack-android#configuration
RNSpokestack.initialize({
  'input': 'com.pylon.spokestack.android.MicrophoneInput', // required, provides audio input into the stages
  'stages': [
    'com.pylon.spokestack.libfvad.VADTrigger', // enable voice activity detection. necessary to trigger speech recognition.
    'com.pylon.spokestack.google.GoogleSpeechRecognizer' // one of the two supplied speech recognition services
    // 'com.pylon.spokestack.microsoft.BingSpeechRecognizer'
  ],
  'properties': {
    'locale': 'en-US',
    'google-credentials': YOUR_GOOGLE_VOICE_CREDENTIALS
    // 'bing-speech-api-key': YOUR_BING_VOICE_CREDENTIALS
  }
})
 
RNSpokestack.start() // start voice activity detection and speech recognition. can only start after initialize is called.
RNSpokestack.stop() // stop voice activity detection and speech recognition. can only start after initialize is called
// NB start() and stop() can be called repeatedly.

API

Method Name	Description	Platform
RNSpokestack.initialize()	Initialize the Spokestack VAD/ASR pipeline; required for start() and stop()	Android
RNSpokestack.start()	Starts listening for speech activity	Android
RNSpokestack.stop()	Stops listening for speech activity	Android

Event Name	Description	Event
Voice.onSpeechStarted(event)	Invoked when speech is recognized	null
Voice.onSpeechEnded(event)	Invoked when speech has stopped	null
Voice.onSpeechRecognized(event)	Invoked when speech has been recognized	string

Gotchas

• Requires Android SDK 26 level support
• Requires Gradle 3.0.1+ (classpath 'com.android.tools.build:gradle:3.0.1' in root build.gradle dependencies)
• Enable app setting for microphone permission

License

Copyright 2018 Pylon, 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.