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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_APP_LIST_SPEECH_RECOGNIZER_DELEGATE_H_
#define CHROME_BROWSER_UI_APP_LIST_SPEECH_RECOGNIZER_DELEGATE_H_
#include <stdint.h>
#include <string>
#include "base/strings/string16.h"
#include "ui/app_list/speech_ui_model_observer.h"
namespace app_list {
// Delegate for the app list speech recognizer. All methods are called from the
// UI thread.
class SpeechRecognizerDelegate {
public:
// Receive a speech recognition result. |is_final| indicated whether the
// result is an intermediate or final result. If |is_final| is true, then the
// recognizer stops and no more results will be returned.
virtual void OnSpeechResult(const base::string16& query, bool is_final) = 0;
// Invoked regularly to indicate the average sound volume.
virtual void OnSpeechSoundLevelChanged(int16_t level) = 0;
// Invoked when the state of speech recognition is changed.
virtual void OnSpeechRecognitionStateChanged(
SpeechRecognitionState new_state) = 0;
// Get the OAuth2 scope and token to pass to the speech recognizer. Does not
// modify the arguments if no auth token is available or allowed.
virtual void GetSpeechAuthParameters(std::string* auth_scope,
std::string* auth_token) = 0;
protected:
virtual ~SpeechRecognizerDelegate() {}
};
} // namespace app_list
#endif // CHROME_BROWSER_UI_APP_LIST_SPEECH_RECOGNIZER_DELEGATE_H_
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