[EFL] Utilize espeak as a synthesizer back-end for WebSpeech
[WebKit-https.git] / Source / WebCore / platform / efl / PlatformSpeechSynthesisProviderEfl.h
1 /*
2  * Copyright (C) 2014 Samsung Electronics
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11  *    documentation and/or other materials provided with the distribution.
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25
26 #ifndef PlatformSpeechSynthesisProviderEfl_h
27 #define PlatformSpeechSynthesisProviderEfl_h
28
29 #if ENABLE(SPEECH_SYNTHESIS)
30
31 #include <speak_lib.h>
32 #include <wtf/PassRefPtr.h>
33 #include <wtf/Vector.h>
34 #include <wtf/text/WTFString.h>
35
36 namespace WebCore {
37
38 class PlatformSpeechSynthesizer;
39 class PlatformSpeechSynthesisUtterance;
40 class PlatformSpeechSynthesisVoice;
41
42 class PlatformSpeechSynthesisProviderEfl {
43 public:
44     enum SpeechEvent {
45         SpeechError,
46         SpeechCancel,
47         SpeechPause,
48         SpeechResume,
49         SpeechStart
50     };
51
52     explicit PlatformSpeechSynthesisProviderEfl(PlatformSpeechSynthesizer*);
53     ~PlatformSpeechSynthesisProviderEfl();
54
55     void initializeVoiceList(Vector<RefPtr<PlatformSpeechSynthesisVoice>>&);
56     void pause();
57     void resume();
58     void speak(PassRefPtr<PlatformSpeechSynthesisUtterance>);
59     void cancel();
60 private:
61     bool engineInit();
62
63     int convertRateToEspeakValue(float) const;
64     int convertVolumeToEspeakValue(float) const;
65     int convertPitchToEspeakValue(float) const;
66
67     espeak_VOICE* currentVoice() const;
68     String voiceName(PassRefPtr<PlatformSpeechSynthesisUtterance>) const;
69     void fireSpeechEvent(SpeechEvent);
70
71     bool m_isEngineStarted;
72     PlatformSpeechSynthesizer* m_platformSpeechSynthesizer;
73     RefPtr<PlatformSpeechSynthesisUtterance> m_utterance;
74 };
75
76 } // namespace WebCore
77
78 #endif // ENABLE(SPEECH_SYNTHESIS)
79
80 #endif // PlatformSpeechSynthesisProviderEfl_h