content/browser/speech/speech_recognizer.h

   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
  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
  35   virtual ~SpeechRecognizer() {}
  36   SpeechRecognitionEventListener* listener() const { return listener_; }
  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_