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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 CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNIZER_H_ | |
6 #define CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNIZER_H_ | |
7 #pragma once | |
8 | |
9 #include <string> | |
10 | |
11 #include "base/memory/ref_counted.h" | |
12 #include "content/common/content_export.h" | |
13 | |
14 namespace net { | |
15 class URLRequestContextGetter; | |
16 } | |
17 | |
18 namespace content { | |
19 | |
20 class SpeechRecognitionEventListener; | |
21 | |
22 // Records audio, sends recorded audio to server and translates server response | |
23 // to recognition result. | |
24 // TODO(primiano) remove this public interface as soon as we fix speech input | |
25 // extensions. | |
26 class SpeechRecognizer : public base::RefCountedThreadSafe<SpeechRecognizer> { | |
27 public: | |
28 CONTENT_EXPORT static SpeechRecognizer* Create( | |
29 SpeechRecognitionEventListener* event_listener, | |
30 int session_id, | |
31 const std::string& language, | |
32 const std::string& grammar, | |
33 net::URLRequestContextGetter* context_getter, | |
34 bool filter_profanities, | |
35 const std::string& hardware_info, | |
36 const std::string& origin_url); | |
37 | |
38 // Starts audio recording and the recognition process. The same | |
39 // SpeechRecognizer instance can be used multiple times for speech recognition | |
40 // though each recognition request can be made only after the previous one | |
41 // completes (i.e. after receiving | |
42 // SpeechRecognitionEventListener::OnRecognitionEnd). | |
43 virtual void StartRecognition() = 0; | |
44 | |
45 // Stops recording audio and cancels recognition. Any audio recorded so far | |
46 // gets discarded. | |
47 virtual void AbortRecognition() = 0; | |
48 | |
49 // Stops recording audio and finalizes recognition, possibly getting results. | |
50 virtual void StopAudioCapture() = 0; | |
51 | |
52 // Checks wether the recognizer is active, that is, either capturing audio | |
53 // or waiting for a result. | |
54 virtual bool IsActive() const = 0; | |
55 | |
56 // Checks whether the recognizer is capturing audio. | |
57 virtual bool IsCapturingAudio() const = 0; | |
58 | |
59 protected: | |
60 friend class base::RefCountedThreadSafe<SpeechRecognizer>; | |
61 virtual ~SpeechRecognizer() {} | |
62 }; | |
63 | |
64 } // namespace content | |
65 | |
66 #endif // CONTENT_PUBLIC_BROWSER_SPEECH_RECOGNIZER_H_ | |
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