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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_SPEECH_TTS_ANDROID_H_
#define CONTENT_BROWSER_SPEECH_TTS_ANDROID_H_
#include <memory>
#include "base/android/scoped_java_ref.h"
#include "content/browser/speech/tts_platform_impl.h"
namespace content {
class TtsEnvironmentAndroid;
class TtsPlatformImplAndroid : public TtsPlatformImpl {
public:
// TtsPlatform overrides.
bool PlatformImplSupported() override;
bool PlatformImplInitialized() override;
void Speak(
int utterance_id,
const std::string& utterance,
const std::string& lang,
const VoiceData& voice,
const UtteranceContinuousParameters& params,
base::OnceCallback<void(bool)> did_start_speaking_callback) override;
bool StopSpeaking() override;
void Pause() override;
void Resume() override;
bool IsSpeaking() override;
void GetVoices(std::vector<VoiceData>* out_voices) override;
// Methods called from Java via JNI.
void VoicesChanged(JNIEnv* env);
void OnEndEvent(JNIEnv* env, jint utterance_id);
void OnErrorEvent(JNIEnv* env, jint utterance_id);
void OnStartEvent(JNIEnv* env, jint utterance_id);
// Static functions.
static TtsPlatformImplAndroid* GetInstance();
TtsPlatformImplAndroid(const TtsPlatformImplAndroid&) = delete;
TtsPlatformImplAndroid& operator=(const TtsPlatformImplAndroid&) = delete;
private:
friend struct base::DefaultSingletonTraits<TtsPlatformImplAndroid>;
TtsPlatformImplAndroid();
~TtsPlatformImplAndroid() override;
void SendFinalTtsEvent(int utterance_id,
TtsEventType event_type,
int char_index);
// Called once TtsController has stripped ssml.
void ProcessSpeech(int utterance_id,
const std::string& lang,
const VoiceData& voice,
const UtteranceContinuousParameters& params,
base::OnceCallback<void(bool)> did_start_speaking_callback,
const std::string& parsed_utterance);
// Starts speaking the utterance now. Returns true if speech started, false
// if it is not possible to speak now.
bool StartSpeakingNow(int utterance_id,
const std::string& lang,
const UtteranceContinuousParameters& params,
const std::string& parsed_utterance,
const std::string& engine_id);
// Called when TtsEnvironmentAndroid::CanSpeakNow() may have changed.
void OnCanSpeakNowChanged();
base::android::ScopedJavaGlobalRef<jobject> java_ref_;
int utterance_id_;
std::string utterance_;
std::unique_ptr<TtsEnvironmentAndroid> environment_android_;
base::WeakPtrFactory<TtsPlatformImplAndroid> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_SPEECH_TTS_ANDROID_H_
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