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Side by Side Diff: content/browser/speech/speech_recognition_engine.h

Issue 11347004: content/browser: Move speech code into content namespace. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years, 1 month ago
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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_RECOGNITION_ENGINE_H_ 5 #ifndef CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
6 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_ 6 #define CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
7 7
8 #include <string> 8 #include <string>
9 9
10 #include "base/basictypes.h" 10 #include "base/basictypes.h"
11 #include "content/common/content_export.h" 11 #include "content/common/content_export.h"
12 #include "content/public/common/speech_recognition_grammar.h" 12 #include "content/public/common/speech_recognition_grammar.h"
13 13
14 namespace content { 14 namespace content {
15
16 class AudioChunk;
15 struct SpeechRecognitionResult; 17 struct SpeechRecognitionResult;
16 struct SpeechRecognitionError; 18 struct SpeechRecognitionError;
17 }
18
19 namespace speech {
20
21 class AudioChunk;
22 19
23 // This interface models the basic contract that a speech recognition engine, 20 // This interface models the basic contract that a speech recognition engine,
24 // either working locally or relying on a remote web-service, must obey. 21 // either working locally or relying on a remote web-service, must obey.
25 // The expected call sequence for exported methods is: 22 // The expected call sequence for exported methods is:
26 // StartRecognition Mandatory at beginning of SR. 23 // StartRecognition Mandatory at beginning of SR.
27 // TakeAudioChunk For every audio chunk pushed. 24 // TakeAudioChunk For every audio chunk pushed.
28 // AudioChunksEnded Finalize the audio stream (omitted in case of errors). 25 // AudioChunksEnded Finalize the audio stream (omitted in case of errors).
29 // EndRecognition Mandatory at end of SR (even on errors). 26 // EndRecognition Mandatory at end of SR (even on errors).
30 // No delegate callbacks are allowed before StartRecognition or after 27 // No delegate callbacks are allowed before StartRecognition or after
31 // EndRecognition. If a recognition was started, the caller can free the 28 // EndRecognition. If a recognition was started, the caller can free the
32 // SpeechRecognitionEngine only after calling EndRecognition. 29 // SpeechRecognitionEngine only after calling EndRecognition.
33 class SpeechRecognitionEngine { 30 class SpeechRecognitionEngine {
34 public: 31 public:
35 // Interface for receiving callbacks from this object. 32 // Interface for receiving callbacks from this object.
36 class Delegate { 33 class Delegate {
37 public: 34 public:
38 // Called whenever a result is retrieved. It might be issued several times, 35 // Called whenever a result is retrieved. It might be issued several times,
39 // (e.g., in the case of continuous speech recognition engine 36 // (e.g., in the case of continuous speech recognition engine
40 // implementations). 37 // implementations).
41 virtual void OnSpeechRecognitionEngineResult( 38 virtual void OnSpeechRecognitionEngineResult(
42 const content::SpeechRecognitionResult& result) = 0; 39 const SpeechRecognitionResult& result) = 0;
43 virtual void OnSpeechRecognitionEngineError( 40 virtual void OnSpeechRecognitionEngineError(
44 const content::SpeechRecognitionError& error) = 0; 41 const SpeechRecognitionError& error) = 0;
45 42
46 protected: 43 protected:
47 virtual ~Delegate() {} 44 virtual ~Delegate() {}
48 }; 45 };
49 46
50 // Remote engine configuration. 47 // Remote engine configuration.
51 struct CONTENT_EXPORT Config { 48 struct CONTENT_EXPORT Config {
52 Config(); 49 Config();
53 ~Config(); 50 ~Config();
54 51
55 std::string language; 52 std::string language;
56 content::SpeechRecognitionGrammarArray grammars; 53 SpeechRecognitionGrammarArray grammars;
57 bool filter_profanities; 54 bool filter_profanities;
58 bool continuous; 55 bool continuous;
59 bool interim_results; 56 bool interim_results;
60 uint32 max_hypotheses; 57 uint32 max_hypotheses;
61 std::string hardware_info; 58 std::string hardware_info;
62 std::string origin_url; 59 std::string origin_url;
63 int audio_sample_rate; 60 int audio_sample_rate;
64 int audio_num_bits_per_sample; 61 int audio_num_bits_per_sample;
65 }; 62 };
66 63
(...skipping 36 matching lines...) Expand 10 before | Expand all | Expand 10 after
103 private: 100 private:
104 Delegate* delegate_; 101 Delegate* delegate_;
105 }; 102 };
106 103
107 // These typedefs are to workaround the issue with certain versions of 104 // These typedefs are to workaround the issue with certain versions of
108 // Visual Studio where it gets confused between multiple Delegate 105 // Visual Studio where it gets confused between multiple Delegate
109 // classes and gives a C2500 error. 106 // classes and gives a C2500 error.
110 typedef SpeechRecognitionEngine::Delegate SpeechRecognitionEngineDelegate; 107 typedef SpeechRecognitionEngine::Delegate SpeechRecognitionEngineDelegate;
111 typedef SpeechRecognitionEngine::Config SpeechRecognitionEngineConfig; 108 typedef SpeechRecognitionEngine::Config SpeechRecognitionEngineConfig;
112 109
113 } // namespace speech 110 } // namespace content
114 111
115 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_ 112 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
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