src/chrome/browser/speech/chrome_speech_recognition_manager_delegate.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_MANAGER_DELEGATE_H_
   6 #define CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_MANAGER_DELEGATE_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "content/public/browser/speech_recognition_event_listener.h"
  11 #include "content/public/browser/speech_recognition_manager_delegate.h"
  12 #include "content/public/browser/speech_recognition_session_config.h"
  13
  14 namespace speech {
  15
  16 // This is Chrome's implementation of the SpeechRecognitionManagerDelegate
  17 // interface.
  18 class ChromeSpeechRecognitionManagerDelegate
  19     : public content::SpeechRecognitionManagerDelegate,
  20       public content::SpeechRecognitionEventListener {
  21  public:
  22   ChromeSpeechRecognitionManagerDelegate();
  23   ~ChromeSpeechRecognitionManagerDelegate() override;
  24
  25  protected:
  26   // SpeechRecognitionEventListener methods.
  27   void OnRecognitionStart(int session_id) override;
  28   void OnAudioStart(int session_id) override;
  29   void OnEnvironmentEstimationComplete(int session_id) override;
  30   void OnSoundStart(int session_id) override;
  31   void OnSoundEnd(int session_id) override;
  32   void OnAudioEnd(int session_id) override;
  33   void OnRecognitionEnd(int session_id) override;
  34   void OnRecognitionResults(
  35       int session_id,
  36       const content::SpeechRecognitionResults& result) override;
  37   void OnRecognitionError(
  38       int session_id,
  39       const content::SpeechRecognitionError& error) override;
  40   void OnAudioLevelsChange(int session_id,
  41                            float volume,
  42                            float noise_volume) override;
  43
  44   // SpeechRecognitionManagerDelegate methods.
  45   void GetDiagnosticInformation(bool* can_report_metrics,
  46                                 std::string* hardware_info) override;
  47   void CheckRecognitionIsAllowed(
  48       int session_id,
  49       base::Callback<void(bool ask_user, bool is_allowed)> callback) override;
  50   content::SpeechRecognitionEventListener* GetEventListener() override;
  51   bool FilterProfanities(int render_process_id) override;
  52
  53   // Callback called by |tab_watcher_| on the IO thread to signal tab closure.
  54   virtual void TabClosedCallback(int render_process_id, int render_view_id);
  55
  56  private:
  57   class OptionalRequestInfo;
  58   class TabWatcher;
  59
  60   // Checks for VIEW_TYPE_TAB_CONTENTS host in the UI thread and notifies back
  61   // the result in the IO thread through |callback|.
  62   static void CheckRenderViewType(
  63       base::Callback<void(bool ask_user, bool is_allowed)> callback,
  64       int render_process_id,
  65       int render_view_id);
  66
  67   scoped_refptr<OptionalRequestInfo> optional_request_info_;
  68   scoped_refptr<TabWatcher> tab_watcher_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(ChromeSpeechRecognitionManagerDelegate);
  71 };
  72
  73 }  // namespace speech
  74
  75 #endif  // CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_MANAGER_DELEGATE_H_