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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_INPUT_MANAGER_H_ | |
| 6 #define CONTENT_PUBLIC_BROWSER_SPEECH_INPUT_MANAGER_H_ | |
| 7 | |
| 8 #include "base/string16.h" | |
| 9 #include "content/common/content_export.h" | |
| 10 | |
| 11 namespace content { | |
| 12 | |
| 13 // This is the gatekeeper for speech recognition in the browser process. It | |
| 14 // handles requests received from various render views and makes sure only one | |
| 15 // of them can use speech recognition at a time. It also sends recognition | |
| 16 // results and status events to the render views when required. | |
| 17 class SpeechInputManager { | |
| 18 public: | |
| 19 // Returns the singleton instance. | |
| 20 CONTENT_EXPORT static SpeechInputManager* GetInstance(); | |
| 21 | |
| 22 // Starts/restarts recognition for an existing request. | |
| 23 virtual void StartRecognitionForRequest(int caller_id) = 0; | |
| 24 | |
| 25 // Cancels recognition for an existing request. | |
| 26 virtual void CancelRecognitionForRequest(int caller_id) = 0; | |
| 27 | |
| 28 // Called when the user clicks outside the speech input UI causing it to close | |
| 29 // and possibly have speech input go to another element. | |
| 30 virtual void FocusLostForRequest(int caller_id) = 0; | |
| 31 | |
| 32 // Returns true if the OS reports existence of audio recording devices. | |
| 33 virtual bool HasAudioInputDevices() = 0; | |
| 34 | |
| 35 // Used to determine if something else is currently making use of audio input. | |
| 36 virtual bool IsRecordingInProcess() = 0; | |
| 37 | |
| 38 // Returns a human readable string for the model/make of the active audio | |
| 39 // input device for this computer. | |
| 40 virtual string16 GetAudioInputDeviceModel() = 0; | |
| 41 | |
| 42 // Invokes the platform provided microphone settings UI in a non-blocking way, | |
| 43 // via the BrowserThread::FILE thread. | |
| 44 virtual void ShowAudioInputSettings() = 0; | |
| 45 | |
| 46 protected: | |
| 47 virtual ~SpeechInputManager() {} | |
| 48 }; | |
| 49 | |
| 50 } // namespace content | |
| 51 | |
| 52 #endif // CONTENT_PUBLIC_BROWSER_SPEECH_INPUT_MANAGER_H_ | |
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