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
12namespace content {
13
14class SpeechRecognitionEventListener;
15
16// Handles speech recognition for a session (identified by |session_id|).
17class 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_
49