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   virtual ~ChromeSpeechRecognitionManagerDelegate();
  24
  25  protected:
  26   // SpeechRecognitionEventListener methods.
  27   virtual void OnRecognitionStart(int session_id) OVERRIDE;
  28   virtual void OnAudioStart(int session_id) OVERRIDE;
  29   virtual void OnEnvironmentEstimationComplete(int session_id) OVERRIDE;
  30   virtual void OnSoundStart(int session_id) OVERRIDE;
  31   virtual void OnSoundEnd(int session_id) OVERRIDE;
  32   virtual void OnAudioEnd(int session_id) OVERRIDE;
  33   virtual void OnRecognitionEnd(int session_id) OVERRIDE;
  34   virtual void OnRecognitionResults(
  35       int session_id, const content::SpeechRecognitionResults& result) OVERRIDE;
  36   virtual void OnRecognitionError(
  37       int session_id, const content::SpeechRecognitionError& error) OVERRIDE;
  38   virtual void OnAudioLevelsChange(int session_id, float volume,
  39                                    float noise_volume) OVERRIDE;
  40
  41   // SpeechRecognitionManagerDelegate methods.
  42   virtual void GetDiagnosticInformation(bool* can_report_metrics,
  43                                         std::string* hardware_info) OVERRIDE;
  44   virtual void CheckRecognitionIsAllowed(
  45       int session_id,
  46       base::Callback<void(bool ask_user, bool is_allowed)> callback) OVERRIDE;
  47   virtual content::SpeechRecognitionEventListener* GetEventListener() OVERRIDE;
  48   virtual bool FilterProfanities(int render_process_id) OVERRIDE;
  49
  50   // Callback called by |tab_watcher_| on the IO thread to signal tab closure.
  51   virtual void TabClosedCallback(int render_process_id, int render_view_id);
  52
  53  private:
  54   class OptionalRequestInfo;
  55   class TabWatcher;
  56
  57   // Checks for VIEW_TYPE_TAB_CONTENTS host in the UI thread and notifies back
  58   // the result in the IO thread through |callback|.
  59   static void CheckRenderViewType(
  60       base::Callback<void(bool ask_user, bool is_allowed)> callback,
  61       int render_process_id,
  62       int render_view_id);
  63
  64   scoped_refptr<OptionalRequestInfo> optional_request_info_;
  65   scoped_refptr<TabWatcher> tab_watcher_;
  66
  67   DISALLOW_COPY_AND_ASSIGN(ChromeSpeechRecognitionManagerDelegate);
  68 };
  69
  70 }  // namespace speech
  71
  72 #endif  // CHROME_BROWSER_SPEECH_CHROME_SPEECH_RECOGNITION_MANAGER_DELEGATE_H_