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// Copyright (c) 2010 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_CHROMEOS_CROS_SPEECH_SYNTHESIS_LIBRARY_H_
#define CHROME_BROWSER_CHROMEOS_CROS_SPEECH_SYNTHESIS_LIBRARY_H_
#pragma once
#include "base/singleton.h"
namespace chromeos {
// This interface defines the interaction with the ChromeOS login library APIs.
class SpeechSynthesisLibrary {
public:
typedef void(*InitStatusCallback)(bool success);
virtual ~SpeechSynthesisLibrary() {}
// Speaks the specified text.
virtual bool Speak(const char* text) = 0;
// Sets options for the subsequent speech synthesis requests.
virtual bool SetSpeakProperties(const char* props) = 0;
// Stops speaking the current utterance.
virtual bool StopSpeaking() = 0;
// Checks if the engine is currently speaking.
virtual bool IsSpeaking() = 0;
// Starts the speech synthesis service and indicates through a callback if
// it started successfully.
virtual void InitTts(InitStatusCallback) = 0;
};
// This class handles the interaction with the ChromeOS login library APIs.
class SpeechSynthesisLibraryImpl : public SpeechSynthesisLibrary {
public:
SpeechSynthesisLibraryImpl() {}
virtual ~SpeechSynthesisLibraryImpl() {}
// SpeechSynthesisLibrary overrides.
virtual bool Speak(const char* text);
virtual bool SetSpeakProperties(const char* props);
virtual bool StopSpeaking();
virtual bool IsSpeaking();
virtual void InitTts(InitStatusCallback);
private:
DISALLOW_COPY_AND_ASSIGN(SpeechSynthesisLibraryImpl);
};
} // namespace chromeos
#endif // CHROME_BROWSER_CHROMEOS_CROS_SPEECH_SYNTHESIS_LIBRARY_H_
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