Hotword Private API: Adds speech training functions.

chrome/browser/search/hotword_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "base/prefs/pref_change_registrar.h"
@@ skipping 10 matching lines @@
 
 namespace extensions {
 class Extension;
 class WebstoreStandaloneInstaller;
 }  // namespace extensions
 
 namespace hotword_internal {
 // Constants for the hotword field trial.
 extern const char kHotwordFieldTrialName[];
 extern const char kHotwordFieldTrialDisabledGroupName[];
+// String passed to indicate the training state has changed.
+extern const char kHotwordTrainingEnabled[];
 }  // namespace hotword_internal
 
 // Provides an interface for the Hotword component that does voice triggered
 // search.
 class HotwordService : public extensions::ExtensionRegistryObserver,
                        public KeyedService {
  public:
   // Returns true if the hotword supports the current system language.
   static bool DoesHotwordSupportLanguage(Profile* profile);
 
@@ skipping 61 matching lines @@
   int error_message() { return error_message_; }
 
   // These methods are for launching, and getting and setting the launch mode of
   // the Hotword Audio Verification App.
   //
   // TODO(kcarattini): Remove this when
   // https://code.google.com/p/chromium/issues/detail?id=165573 is fixed,
   // at which time we can simply launch the app in the given mode instead of
   // having to check for it here.
   enum LaunchMode {
-    AUDIO_HISTORY_ONLY,
     HOTWORD_ONLY,
     HOTWORD_AND_AUDIO_HISTORY,
-    SPEECH_TRAINING
+    RETRAIN
   };
   void LaunchHotwordAudioVerificationApp(const LaunchMode& launch_mode);
   virtual LaunchMode GetHotwordAudioVerificationLaunchMode();
 
+  // These methods control the speaker training communication between
+  // the Hotword Audio Verification App and the Hotword Extension that
+  // contains the NaCl module.
+  void StartTraining();
+  void FinalizeSpeakerModel();
+  void StopTraining();
+  void NotifyHotwordTriggered();
+
+  // Returns true if speaker training is currently in progress.
+  bool IsTraining();
+
  private:
   // Returns the ID of the extension that may need to be reinstalled.
   std::string ReinstalledExtensionId();
 
   Profile* profile_;
 
   PrefChangeRegistrar pref_registrar_;
 
   content::NotificationRegistrar registrar_;
 
   // For observing the ExtensionRegistry.
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
   scoped_refptr<extensions::WebstoreStandaloneInstaller> installer_;
 
   HotwordClient* client_;
   int error_message_;
   bool reinstall_pending_;
+  // Whether we are currently in the process of training the speaker model.
+  bool training_;
 
   base::WeakPtrFactory<HotwordService> weak_factory_;
 
   // Stores the launch mode for the Hotword Audio Verification App.
   LaunchMode hotword_audio_verification_launch_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(HotwordService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_HOTWORD_SERVICE_H_