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

Issue 11421103: Update the Speech Api to support array(s) of result items (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: sigh Created 8 years 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 #include "content/public/common/speech_recognition_result.h"
13 14
14 namespace content { 15 namespace content {
15 16
16 class AudioChunk; 17 class AudioChunk;
17 struct SpeechRecognitionResult;
18 struct SpeechRecognitionError; 18 struct SpeechRecognitionError;
19 19
20 // This interface models the basic contract that a speech recognition engine, 20 // This interface models the basic contract that a speech recognition engine,
21 // 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.
22 // The expected call sequence for exported methods is: 22 // The expected call sequence for exported methods is:
23 // StartRecognition Mandatory at beginning of SR. 23 // StartRecognition Mandatory at beginning of SR.
24 // TakeAudioChunk For every audio chunk pushed. 24 // TakeAudioChunk For every audio chunk pushed.
25 // AudioChunksEnded Finalize the audio stream (omitted in case of errors). 25 // AudioChunksEnded Finalize the audio stream (omitted in case of errors).
26 // EndRecognition Mandatory at end of SR (even on errors). 26 // EndRecognition Mandatory at end of SR (even on errors).
27 // No delegate callbacks are allowed before StartRecognition or after 27 // No delegate callbacks are allowed before StartRecognition or after
28 // EndRecognition. If a recognition was started, the caller can free the 28 // EndRecognition. If a recognition was started, the caller can free the
29 // SpeechRecognitionEngine only after calling EndRecognition. 29 // SpeechRecognitionEngine only after calling EndRecognition.
30 class SpeechRecognitionEngine { 30 class SpeechRecognitionEngine {
31 public: 31 public:
32 // Interface for receiving callbacks from this object. 32 // Interface for receiving callbacks from this object.
33 class Delegate { 33 class Delegate {
34 public: 34 public:
35 // 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,
36 // (e.g., in the case of continuous speech recognition engine 36 // (e.g., in the case of continuous speech recognition engine
37 // implementations). 37 // implementations).
38 virtual void OnSpeechRecognitionEngineResult( 38 virtual void OnSpeechRecognitionEngineResults(
39 const SpeechRecognitionResult& result) = 0; 39 const SpeechRecognitionResults& results) = 0;
40 virtual void OnSpeechRecognitionEngineError( 40 virtual void OnSpeechRecognitionEngineError(
41 const SpeechRecognitionError& error) = 0; 41 const SpeechRecognitionError& error) = 0;
42 42
43 protected: 43 protected:
44 virtual ~Delegate() {} 44 virtual ~Delegate() {}
45 }; 45 };
46 46
47 // Remote engine configuration. 47 // Remote engine configuration.
48 struct CONTENT_EXPORT Config { 48 struct CONTENT_EXPORT Config {
49 Config(); 49 Config();
(...skipping 53 matching lines...) Expand 10 before | Expand all | Expand 10 after
103 103
104 // These typedefs are to workaround the issue with certain versions of 104 // These typedefs are to workaround the issue with certain versions of
105 // Visual Studio where it gets confused between multiple Delegate 105 // Visual Studio where it gets confused between multiple Delegate
106 // classes and gives a C2500 error. 106 // classes and gives a C2500 error.
107 typedef SpeechRecognitionEngine::Delegate SpeechRecognitionEngineDelegate; 107 typedef SpeechRecognitionEngine::Delegate SpeechRecognitionEngineDelegate;
108 typedef SpeechRecognitionEngine::Config SpeechRecognitionEngineConfig; 108 typedef SpeechRecognitionEngine::Config SpeechRecognitionEngineConfig;
109 109
110 } // namespace content 110 } // namespace content
111 111
112 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_ 112 #endif // CONTENT_BROWSER_SPEECH_SPEECH_RECOGNITION_ENGINE_H_
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