axmol/CocosDenshion/include/SimpleAudioEngine.h

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE.
****************************************************************************/

#ifndef _SIMPLE_AUDIO_ENGINE_H_
#define _SIMPLE_AUDIO_ENGINE_H_

#include "../Export.h"

/**
@struct T_SoundResInfo
@brief  The data type of resource name and resource ID
*/
typedef struct _tResourceInfo
{
    const char* FileName;
    int         nResID;
} T_SoundResInfo;

/*!***************************************************************************
@class          SimpleAudioEngine
@brief  		offer a VERY simple interface to play background music & sound effect
*****************************************************************************/
class EXPORT_DLL SimpleAudioEngine
{
public:
    SimpleAudioEngine();
    ~SimpleAudioEngine();

    /**
    @brief Get the shared Engine object,it will new one when first time be called
    */
    static SimpleAudioEngine* getSharedEngine();

    /**
    @brief Release the shared Engine object
    */
	static void release();

    /**
    @brief set the sound ResInfo,it's only used on platform-uphone now
    */
    void setSoundResInfo(const T_SoundResInfo ResInfo[], int nCount);

    /**
    @brief Set the resource entry,it's only used on platform-uphone now
    */
    void setResourceEntry(const void* pResEntry);

    /**
    @brief Play background music
    @param pszFilePath The path of the background music file,or the FileName of T_SoundResInfo
    @param bLoop Whether the background music loop or not
    */
    void playBackgroundMusic(const char* pszFilePath, bool bLoop = false);

    /**
    @brief Stop playing background music
    */
    void stopBackgroundMusic();

    /**
    @brief Pause playing background music
    */
    void pauseBackgroundMusic();

    /**
    @brief Resume playing background music
    */
    void resumeBackgroundMusic();

    /**
    @brief Rewind playing background music
    */
    void rewindBackgroundMusic();

    bool willPlayBackgroundMusic();

    /**
    @brief Whether the background music is playing
    @return If is playing return true,or return false
    */
    bool isBackgroundMusicPlaying();

    // properties
    /**
    @brief The volume of the background music max value is 100,the min value is 0
    */
    int GetBackgroundMusicVolume();
    void SetBackgroundMusicVolume(int volume);

    /**
    @brief The volume of the effects max value is 100,the min value is 0
    */
    int GetEffectsVolume();
    void SetEffectsVolume(int volume);

    // for sound effects
    /**
    @brief Play sound effect
    @param pszFilePath The path of the effect file,or the FileName of T_SoundResInfo
    @return If play succeed return the effect sound ID,or return 0
    */
    int playEffect(const char* pszFilePath);

    /**
    @brief Stop playing sound effect
    @param nSoundId The return value of function playEffect or preloadEffect
    */
    void stopEffect(int nSoundId);

    /*!***************************************************************************
    @brief  		preload a compressed audio file
    @details	    the compressed audio will be decode to wave, then write into an 
    internal buffer in SimpleaudioEngine
    @param[in]		pszFilePath		the relative path to currently executing program
    @return         >0              preload success, return the SoundId
    @return         ==0             can't read the file, or unsupported audio format
    *****************************************************************************/
    int preloadEffect(const char* pszFilePath);


    /*!***************************************************************************
    @brief  		unload the preloaded effect from internal buffer
    @param[in]		nSoundId		the sound id returned from preloadEffect
    *****************************************************************************/
    void unloadEffect(int nSoundId);


	/*!***************************************************************************
	@brief          unload all preloaded effect from internal buffer
	*****************************************************************************/
	void unloadEffectAll();


    /*!***************************************************************************
    @brief          play the preloaded effect
    @param[in]		nSoundId		the sound id returned from preloadEffect
    *****************************************************************************/
    void playPreloadedEffect(int nSoundId);
};

#endif // _SIMPLE_AUDIO_ENGINE_H_