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// Copyright (c) 2012 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.
#include "chrome/browser/speech/tts_platform.h"
// Chrome OS doesn't have native TTS, instead it includes a built-in
// component extension that provides speech synthesis. This class includes
// an implementation of LoadBuiltInTtsExtension and dummy implementations of
// everything else.
class TtsPlatformImplChromeOs : public TtsPlatformImpl {
public:
// TtsPlatformImpl overrides:
virtual bool PlatformImplAvailable() override {
return false;
}
virtual bool LoadBuiltInTtsExtension(
content::BrowserContext* browser_context) override {
TtsEngineDelegate* tts_engine_delegate =
TtsController::GetInstance()->GetTtsEngineDelegate();
if (tts_engine_delegate)
return tts_engine_delegate->LoadBuiltInTtsExtension(browser_context);
return false;
}
virtual bool Speak(
int utterance_id,
const std::string& utterance,
const std::string& lang,
const VoiceData& voice,
const UtteranceContinuousParameters& params) override {
return false;
}
virtual bool StopSpeaking() override {
return false;
}
virtual void Pause() override {}
virtual void Resume() override {}
virtual bool IsSpeaking() override {
return false;
}
virtual void GetVoices(std::vector<VoiceData>* out_voices) override {
}
// Get the single instance of this class.
static TtsPlatformImplChromeOs* GetInstance();
private:
TtsPlatformImplChromeOs() {}
virtual ~TtsPlatformImplChromeOs() {}
friend struct DefaultSingletonTraits<TtsPlatformImplChromeOs>;
DISALLOW_COPY_AND_ASSIGN(TtsPlatformImplChromeOs);
};
// static
TtsPlatformImpl* TtsPlatformImpl::GetInstance() {
return TtsPlatformImplChromeOs::GetInstance();
}
// static
TtsPlatformImplChromeOs*
TtsPlatformImplChromeOs::GetInstance() {
return Singleton<TtsPlatformImplChromeOs>::get();
}
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