Use the same interface in the TTS engine interface for setLanguage and loadLanguage.

    TTS_MISSING_RESOURCES       = -6

};

enum tts_support_result {

    TTS_LANG_COUNTRY_VAR_AVAILABLE = 2,

    TTS_LANG_COUNTRY_AVAILABLE = 1,

    TTS_LANG_AVAILABLE = 0,

    TTS_LANG_MISSING_DATA = -1,

    TTS_LANG_NOT_SUPPORTED = -2

};

class TtsEngine

{

public:

    // @return TTS_SUCCESS, or TTS_FAILURE

    virtual tts_result stop();

    // Returns the level of support for the language, country and variant.

    // @return TTS_LANG_COUNTRY_VAR_AVAILABLE if the language, country and variant are supported,

    //            and the corresponding resources are correctly installed

    //         TTS_LANG_COUNTRY_AVAILABLE if the language and country are supported and the

    //             corresponding resources are correctly installed, but there is no match for

    //             the specified variant

    //         TTS_LANG_AVAILABLE if the language is supported and the

    //             corresponding resources are correctly installed, but there is no match for

    //             the specified country and variant

    //         TTS_LANG_MISSING_DATA if the required resources to provide any level of support

    //             for the language are not correctly installed

    //         TTS_LANG_NOT_SUPPORTED if the language is not supported by the TTS engine.

    virtual tts_support_result isLanguageAvailable(const char *lang, const char *country,

            const char *variant);

    // Load the resources associated with the specified language. The loaded

    // language will only be used once a call to setLanguage() with the same

    // language value is issued. Language values are based on the Android

    // conventions for localization as described in the Android platform

    // documentation on internationalization. This implies that language

    // data is specified in the format xx-rYY, where xx is a two letter

    // ISO 639-1 language code in lowercase and rYY is a two letter

    // ISO 3166-1-alpha-2 language code in uppercase preceded by a

    // lowercase "r".

    // @param value pointer to the language value

    // @param size  length of the language value

    // language value is issued. Language and country values are coded according to the ISO three

    // letter codes for languages and countries, as can be retrieved from a java.util.Locale

    // instance. The variant value is encoded as the variant string retrieved from a

    // java.util.Locale instance built with that variant data.

    // @param lang pointer to the ISO three letter code for the language

    // @param country pointer to the ISO three letter code for the country

    // @param variant pointer to the variant code

    // @return TTS_SUCCESS, or TTS_FAILURE

    virtual tts_result loadLanguage(const char *value, const size_t size);

    virtual tts_result loadLanguage(const char *lang, const char *country, const char *variant);

    // Load the resources associated with the specified language, country and Locale variant.

    // The loaded language will only be used once a call to setLanguageFromLocale() with the same