Adds volume level measurements to the AudioInputController for low-latency clients

content/browser/speech/speech_recognizer_impl.h

 // Copyright (c) 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 CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_
 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/speech/endpointer/endpointer.h"
@@ skipping 115 matching lines @@
   // Callback called on IO thread by audio_controller->Close().
   void OnAudioClosed(media::AudioInputController*);
 
   // AudioInputController::EventHandler methods.
   virtual void OnCreated(media::AudioInputController* controller) OVERRIDE {}
   virtual void OnRecording(media::AudioInputController* controller) OVERRIDE {}
   virtual void OnError(media::AudioInputController* controller,
       media::AudioInputController::ErrorCode error_code) OVERRIDE;
   virtual void OnData(media::AudioInputController* controller,
                       const uint8* data, uint32 size) OVERRIDE;
+  virtual void OnLog(media::AudioInputController* controller,
+                     const std::string& message) OVERRIDE {}
 
   // SpeechRecognitionEngineDelegate methods.
   virtual void OnSpeechRecognitionEngineResults(
       const SpeechRecognitionResults& results) OVERRIDE;
   virtual void OnSpeechRecognitionEngineError(
       const SpeechRecognitionError& error) OVERRIDE;
 
   static media::AudioManager* audio_manager_for_tests_;
 
   scoped_ptr<SpeechRecognitionEngine> recognition_engine_;
@@ skipping 11 matching lines @@
   // Converts data between native input format and a WebSpeech specific
   // output format.
   scoped_ptr<SpeechRecognizerImpl::OnDataConverter> audio_converter_;
 
   DISALLOW_COPY_AND_ASSIGN(SpeechRecognizerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_