1 // Copyright (c) 2013 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 CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_H_ 6 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_H_ 7 8 #include "base/logging.h" 9 #include "base/memory/ref_counted.h" 10 #include "content/common/content_export.h" 11 12 namespace content { 13 14 class SpeechRecognitionEventListener; 15 16 // Handles speech recognition for a session (identified by |session_id|). 17 class CONTENT_EXPORT SpeechRecognizer 18 : public base::RefCountedThreadSafe<SpeechRecognizer> { 19 public: 20 SpeechRecognizer(SpeechRecognitionEventListener * listener,int session_id)21 SpeechRecognizer(SpeechRecognitionEventListener* listener, int session_id) 22 : listener_(listener), session_id_(session_id) { 23 DCHECK(listener_); 24 } 25 26 virtual void StartRecognition(const std::string& device_id) = 0; 27 virtual void AbortRecognition() = 0; 28 virtual void StopAudioCapture() = 0; 29 virtual bool IsActive() const = 0; 30 virtual bool IsCapturingAudio() const = 0; 31 32 protected: 33 friend class base::RefCountedThreadSafe<SpeechRecognizer>; 34 ~SpeechRecognizer()35 virtual ~SpeechRecognizer() {} listener()36 SpeechRecognitionEventListener* listener() const { return listener_; } session_id()37 int session_id() const { return session_id_; } 38 39 private: 40 SpeechRecognitionEventListener* listener_; 41 int session_id_; 42 43 DISALLOW_COPY_AND_ASSIGN(SpeechRecognizer); 44 }; 45 46 } // namespace content 47 48 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_H_ 49