Delete the old hotwording integration.

chrome/browser/resources/app_list/speech_manager.js

-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @fileoverview The class to Manage both offline / online speech recognition.
- */
-
-<include src="plugin_manager.js">
-<include src="audio_manager.js">
-<include src="speech_recognition_manager.js">
-
-cr.define('speech', function() {
-  'use strict';
-
-  /**
-   * The state of speech recognition.
-   *
-   * @enum {string}
-   */
-  var SpeechState = {
-    READY: 'READY',
-    HOTWORD_RECOGNIZING: 'HOTWORD_RECOGNIZING',
-    RECOGNIZING: 'RECOGNIZING',
-    IN_SPEECH: 'IN_SPEECH',
-    STOPPING: 'STOPPING',
-    NETWORK_ERROR: 'NETWORK_ERROR'
-  };
-
-  /**
-   * The time to show the network error message in seconds.
-   *
-   * @const {number}
-   */
-  var SPEECH_ERROR_TIMEOUT = 3;
-
-  /**
-   * Checks the prefix for the hotword module based on the language. This is
-   * fragile if the file structure has changed.
-   */
-  function getHotwordPrefix() {
-    var prefix = navigator.language.toLowerCase();
-    if (prefix == 'en-gb')
-      return prefix;
-    var hyphen = prefix.indexOf('-');
-    if (hyphen >= 0)
-      prefix = prefix.substr(0, hyphen);
-    if (prefix == 'en')
-      prefix = '';
-    return prefix;
-  }
-
-  /**
-   * @constructor
-   */
-  function SpeechManager() {
-    this.audioManager_ = new speech.AudioManager();
-    this.audioManager_.addEventListener('audio', this.onAudioLevel_.bind(this));
-    this.speechRecognitionManager_ = new speech.SpeechRecognitionManager(this);
-    this.errorTimeoutId_ = null;
-  }
-
-  /**
-   * Updates the state.
-   *
-   * @param {SpeechState} newState The new state.
-   * @private
-   */
-  SpeechManager.prototype.setState_ = function(newState) {
-    if (this.state == newState)
-      return;
-
-    this.state = newState;
-    chrome.send('setSpeechRecognitionState', [this.state]);
-  };
-
-  /**
-   * Called with the mean audio level when audio data arrives.
-   *
-   * @param {cr.event.Event} event The event object for the audio data.
-   * @private
-   */
-  SpeechManager.prototype.onAudioLevel_ = function(event) {
-    var data = event.data;
-    var level = 0;
-    for (var i = 0; i < data.length; ++i)
-      level += Math.abs(data[i]);
-    level /= data.length;
-    chrome.send('speechSoundLevel', [level]);
-  };
-
-  /**
-   * Called when the hotword recognizer is ready.
-   *
-   * @param {PluginManager} pluginManager The hotword plugin manager which gets
-   *   ready.
-   * @private
-   */
-  SpeechManager.prototype.onHotwordRecognizerReady_ = function(pluginManager) {
-    this.pluginManager_ = pluginManager;
-    this.audioManager_.addEventListener(
-        'audio', pluginManager.sendAudioData.bind(pluginManager));
-    this.pluginManager_.startRecognizer();
-    this.audioManager_.start();
-    this.setState_(SpeechState.HOTWORD_RECOGNIZING);
-  };
-
-  /**
-   * Called when an error happens for loading the hotword recognizer.
-   *
-   * @private
-   */
-  SpeechManager.prototype.onHotwordRecognizerLoadError_ = function() {
-    this.setHotwordEnabled(false);
-    this.setState_(SpeechState.READY);
-  };
-
-  /**
-   * Called when the hotword is recognized.
-   *
-   * @private
-   */
-  SpeechManager.prototype.onHotwordRecognized_ = function() {
-    if (this.state != SpeechState.HOTWORD_RECOGNIZING)
-      return;
-    this.pluginManager_.stopRecognizer();
-    this.speechRecognitionManager_.start();
-  };
-
-  /**
-   * Called when the speech recognition has happened.
-   *
-   * @param {string} result The speech recognition result.
-   * @param {boolean} isFinal Whether the result is final or not.
-   */
-  SpeechManager.prototype.onSpeechRecognized = function(result, isFinal) {
-    chrome.send('speechResult', [result, isFinal]);
-    if (isFinal)
-      this.speechRecognitionManager_.stop();
-  };
-
-  /**
-   * Called when the speech recognition has started.
-   */
-  SpeechManager.prototype.onSpeechRecognitionStarted = function() {
-    this.setState_(SpeechState.RECOGNIZING);
-  };
-
-  /**
-   * Called when the speech recognition has ended.
-   */
-  SpeechManager.prototype.onSpeechRecognitionEnded = function() {
-    // Do not handle the speech recognition ends if it ends due to an error
-    // because an error message should be shown for a while.
-    // See onSpeechRecognitionError.
-    if (this.state == SpeechState.NETWORK_ERROR)
-      return;
-
-    // Restarts the hotword recognition.
-    if (this.state != SpeechState.STOPPING && this.pluginManager_) {
-      this.pluginManager_.startRecognizer();
-      this.audioManager_.start();
-      this.setState_(SpeechState.HOTWORD_RECOGNIZING);
-    } else {
-      this.audioManager_.stop();
-      this.setState_(SpeechState.READY);
-    }
-  };
-
-  /**
-   * Called when a speech has started.
-   */
-  SpeechManager.prototype.onSpeechStarted = function() {
-    if (this.state == SpeechState.RECOGNIZING)
-      this.setState_(SpeechState.IN_SPEECH);
-  };
-
-  /**
-   * Called when a speech has ended.
-   */
-  SpeechManager.prototype.onSpeechEnded = function() {
-    if (this.state == SpeechState.IN_SPEECH)
-      this.setState_(SpeechState.RECOGNIZING);
-  };
-
-  /**
-   * Called when the speech manager should recover from the error state.
-   *
-   * @private
-   */
-  SpeechManager.prototype.onSpeechRecognitionErrorTimeout_ = function() {
-    this.errorTimeoutId_ = null;
-    this.setState_(SpeechState.READY);
-    this.onSpeechRecognitionEnded();
-  };
-
-  /**
-   * Called when an error happened during the speech recognition.
-   *
-   * @param {SpeechRecognitionError} e The error object.
-   */
-  SpeechManager.prototype.onSpeechRecognitionError = function(e) {
-    if (e.error == 'network') {
-      this.setState_(SpeechState.NETWORK_ERROR);
-      this.errorTimeoutId_ = window.setTimeout(
-          this.onSpeechRecognitionErrorTimeout_.bind(this),
-          SPEECH_ERROR_TIMEOUT * 1000);
-    } else {
-      if (this.state != SpeechState.STOPPING)
-        this.setState_(SpeechState.READY);
-    }
-  };
-
-  /**
-   * Changes the availability of the hotword plugin.
-   *
-   * @param {boolean} enabled Whether enabled or not.
-   */
-  SpeechManager.prototype.setHotwordEnabled = function(enabled) {
-    var recognizer = $('recognizer');
-    if (enabled) {
-      if (recognizer)
-        return;
-      if (!this.naclArch)
-        return;
-
-      var prefix = getHotwordPrefix();
-      var pluginManager = new speech.PluginManager(
-          prefix,
-          this.onHotwordRecognizerReady_.bind(this),
-          this.onHotwordRecognized_.bind(this),
-          this.onHotwordRecognizerLoadError_.bind(this));
-      var modelUrl = 'chrome://app-list/_platform_specific/' + this.naclArch +
-          '_' + prefix + '/hotword.data';
-      pluginManager.scheduleInitialize(this.audioManager_.sampleRate, modelUrl);
-    } else {
-      if (!recognizer)
-        return;
-      document.body.removeChild(recognizer);
-      this.pluginManager_ = null;
-      if (this.state == SpeechState.HOTWORD_RECOGNIZING) {
-        this.audioManager_.stop();
-        this.setState_(SpeechState.READY);
-      }
-    }
-  };
-
-  /**
-   * Sets the NaCl architecture for the hotword module.
-   *
-   * @param {string} arch The architecture.
-   */
-  SpeechManager.prototype.setNaclArch = function(arch) {
-    this.naclArch = arch;
-  };
-
-  /**
-   * Called when the app-list bubble is shown.
-   *
-   * @param {boolean} hotwordEnabled Whether the hotword is enabled or not.
-   */
-  SpeechManager.prototype.onShown = function(hotwordEnabled) {
-    this.setHotwordEnabled(hotwordEnabled);
-
-    // No one sets the state if the content is initialized on shown but hotword
-    // is not enabled. Sets the state in such case.
-    if (!this.state && !hotwordEnabled)
-      this.setState_(SpeechState.READY);
-  };
-
-  /**
-   * Called when the app-list bubble is hidden.
-   */
-  SpeechManager.prototype.onHidden = function() {
-    this.setHotwordEnabled(false);
-
-    // SpeechRecognition is asynchronous.
-    this.audioManager_.stop();
-    if (this.state == SpeechState.RECOGNIZING ||
-        this.state == SpeechState.IN_SPEECH) {
-      this.setState_(SpeechState.STOPPING);
-      this.speechRecognitionManager_.stop();
-    } else {
-      this.setState_(SpeechState.READY);
-    }
-  };
-
-  /**
-   * Toggles the current state of speech recognition.
-   */
-  SpeechManager.prototype.toggleSpeechRecognition = function() {
-    if (this.state == SpeechState.NETWORK_ERROR) {
-      if (this.errorTimeoutId_)
-        window.clearTimeout(this.errorTimeoutId_);
-      this.onSpeechRecognitionErrorTimeout_();
-    } else if (this.state == SpeechState.RECOGNIZING ||
-        this.state == SpeechState.IN_SPEECH) {
-      this.audioManager_.stop();
-      this.speechRecognitionManager_.stop();
-    } else {
-      if (this.pluginManager_)
-        this.pluginManager_.stopRecognizer();
-      if (this.audioManager_.state == speech.AudioState.STOPPED)
-        this.audioManager_.start();
-      this.speechRecognitionManager_.start();
-    }
-  };
-
-  return {
-    SpeechManager: SpeechManager
-  };
-});