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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_ | 5 #ifndef CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_ |
6 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_ | 6 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_ |
7 | 7 |
8 #include <list> | 8 #include <list> |
9 #include <utility> | 9 #include <utility> |
10 | 10 |
11 #include "base/compiler_specific.h" | 11 #include "base/compiler_specific.h" |
12 #include "base/memory/scoped_ptr.h" | 12 #include "base/memory/scoped_ptr.h" |
13 #include "content/browser/speech/audio_encoder.h" | 13 #include "content/browser/speech/audio_encoder.h" |
14 #include "content/browser/speech/endpointer/endpointer.h" | 14 #include "content/browser/speech/endpointer/endpointer.h" |
15 #include "content/browser/speech/speech_recognition_request.h" | 15 #include "content/browser/speech/speech_recognition_request.h" |
16 #include "content/public/browser/speech_recognizer.h" | 16 #include "content/public/browser/speech_recognizer.h" |
17 #include "content/public/common/speech_input_result.h" | 17 #include "content/public/common/speech_recognition_result.h" |
18 #include "media/audio/audio_input_controller.h" | 18 #include "media/audio/audio_input_controller.h" |
19 | 19 |
20 class AudioManager; | 20 class AudioManager; |
21 | 21 |
22 namespace speech_input { | 22 namespace speech { |
23 | 23 |
24 // Records audio, sends recorded audio to server and translates server response | 24 // Records audio, sends recorded audio to server and translates server response |
25 // to recognition result. | 25 // to recognition result. |
26 class CONTENT_EXPORT SpeechRecognizerImpl | 26 class CONTENT_EXPORT SpeechRecognizerImpl |
27 : NON_EXPORTED_BASE(public content::SpeechRecognizer), | 27 : NON_EXPORTED_BASE(public content::SpeechRecognizer), |
28 public media::AudioInputController::EventHandler, | 28 public media::AudioInputController::EventHandler, |
29 public SpeechRecognitionRequestDelegate { | 29 public SpeechRecognitionRequestDelegate { |
30 public: | 30 public: |
31 SpeechRecognizerImpl(content::SpeechRecognizerDelegate* delegate, | 31 SpeechRecognizerImpl(content::SpeechRecognizerDelegate* delegate, |
32 int caller_id, | 32 int caller_id, |
33 const std::string& language, | 33 const std::string& language, |
34 const std::string& grammar, | 34 const std::string& grammar, |
35 net::URLRequestContextGetter* context_getter, | 35 net::URLRequestContextGetter* context_getter, |
36 bool filter_profanities, | 36 bool filter_profanities, |
37 const std::string& hardware_info, | 37 const std::string& hardware_info, |
38 const std::string& origin_url); | 38 const std::string& origin_url); |
39 | 39 |
40 virtual ~SpeechRecognizerImpl(); | 40 virtual ~SpeechRecognizerImpl(); |
41 | 41 |
42 // SpeechRecognizer implementation: | 42 // SpeechRecognizer implementation: |
43 virtual bool StartRecording() OVERRIDE; | 43 virtual bool StartRecording() OVERRIDE; |
44 virtual void CancelRecognition() OVERRIDE; | 44 virtual void CancelRecognition() OVERRIDE; |
45 | 45 |
46 // Stops recording audio and starts recognition. | 46 // Stops recording audio and starts recognition. |
47 void StopRecording(); | 47 void StopRecording(); |
48 | 48 |
49 // AudioInputController::EventHandler methods. | 49 // AudioInputController::EventHandler methods. |
50 virtual void OnCreated(media::AudioInputController* controller) OVERRIDE { } | 50 virtual void OnCreated(media::AudioInputController* controller) OVERRIDE {} |
51 virtual void OnRecording(media::AudioInputController* controller) OVERRIDE { } | 51 virtual void OnRecording(media::AudioInputController* controller) OVERRIDE {} |
52 virtual void OnError(media::AudioInputController* controller, | 52 virtual void OnError(media::AudioInputController* controller, |
53 int error_code) OVERRIDE; | 53 int error_code) OVERRIDE; |
54 virtual void OnData(media::AudioInputController* controller, | 54 virtual void OnData(media::AudioInputController* controller, |
55 const uint8* data, | 55 const uint8* data, |
56 uint32 size) OVERRIDE; | 56 uint32 size) OVERRIDE; |
57 | 57 |
58 // SpeechRecognitionRequest::Delegate methods. | 58 // SpeechRecognitionRequest::Delegate methods. |
59 virtual void SetRecognitionResult( | 59 virtual void SetRecognitionResult( |
60 const content::SpeechInputResult& result) OVERRIDE; | 60 const content::SpeechRecognitionResult& result) OVERRIDE; |
61 | 61 |
62 static const int kAudioSampleRate; | 62 static const int kAudioSampleRate; |
63 static const int kAudioPacketIntervalMs; // Duration of each audio packet. | 63 static const int kAudioPacketIntervalMs; // Duration of each audio packet. |
64 static const ChannelLayout kChannelLayout; | 64 static const ChannelLayout kChannelLayout; |
65 static const int kNumBitsPerAudioSample; | 65 static const int kNumBitsPerAudioSample; |
66 static const int kNoSpeechTimeoutSec; | 66 static const int kNoSpeechTimeoutSec; |
67 static const int kEndpointerEstimationTimeMs; | 67 static const int kEndpointerEstimationTimeMs; |
68 | 68 |
69 private: | 69 private: |
70 friend class SpeechRecognizerTest; | 70 friend class SpeechRecognizerTest; |
71 | 71 |
72 void InformErrorAndCancelRecognition(content::SpeechInputError error); | 72 void InformErrorAndCancelRecognition( |
| 73 content::SpeechRecognitionErrorCode error); |
73 void SendRecordedAudioToServer(); | 74 void SendRecordedAudioToServer(); |
74 | 75 |
75 void HandleOnError(int error_code); // Handles OnError in the IO thread. | 76 void HandleOnError(int error_code); // Handles OnError in the IO thread. |
76 | 77 |
77 // Handles OnData in the IO thread. Takes ownership of |data|. | 78 // Handles OnData in the IO thread. Takes ownership of |data|. |
78 void HandleOnData(std::string* data); | 79 void HandleOnData(std::string* data); |
79 | 80 |
80 // Helper method which closes the audio controller and blocks until done. | 81 // Helper method which closes the audio controller and blocks until done. |
81 void CloseAudioControllerSynchronously(); | 82 void CloseAudioControllerSynchronously(); |
82 | 83 |
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96 AudioEncoder::Codec codec_; | 97 AudioEncoder::Codec codec_; |
97 scoped_ptr<AudioEncoder> encoder_; | 98 scoped_ptr<AudioEncoder> encoder_; |
98 Endpointer endpointer_; | 99 Endpointer endpointer_; |
99 int num_samples_recorded_; | 100 int num_samples_recorded_; |
100 float audio_level_; | 101 float audio_level_; |
101 AudioManager* audio_manager_; | 102 AudioManager* audio_manager_; |
102 | 103 |
103 DISALLOW_COPY_AND_ASSIGN(SpeechRecognizerImpl); | 104 DISALLOW_COPY_AND_ASSIGN(SpeechRecognizerImpl); |
104 }; | 105 }; |
105 | 106 |
106 } // namespace speech_input | 107 } // namespace speech |
107 | 108 |
108 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_ | 109 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNIZER_IMPL_H_ |
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