C:/Users/Public/AGS Final Folder/BFLETCHER D4010283/Source/Game/Source/SoundManager.h

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#ifndef _SOUNDMANAGER_H_
#define _SOUNDMANAGER_H_ //buy mum pc microphone

#include "TSingleton.h"
#include "IEventListener.h"
#include "SDL.h"

#include <vector>

typedef short int Sint16;
typedef unsigned short int Uint16;
typedef unsigned char Uint8;
typedef unsigned int SoundID;
typedef unsigned int SoundInstanceID;
typedef unsigned int UInt;

class ISound;

class SoundManager : public TSingleton<SoundManager>, public IEventListener
{
        public:
        SoundManager();
        ~SoundManager();

        void Initialise(int freq = 44100, Uint16 samples = 1024, Uint8 channels = 1);
        void Shutdown();

        SoundID CreateSoundSong(const bool &bPreCreate, const UInt &bpm, const UInt &numUniqueSections, const UInt &lengthInSections, const UInt &timePerSection);

        SoundInstanceID PlaySoundID(const SoundID &sid, bool loop = false); //Implement error handling by exceptions!!
        bool PauseSound(const SoundInstanceID &siid);
        bool StopSound(const SoundInstanceID &siid);

        void Update(); //Should be called in the same style as the render loop, as quickly as possible.

        void Output();
        void IncreaseVolume();
        void DecreaseVolume();

        void HandleAudioBuffer(void* userdata, Uint8* stream, int len);
        SDL_AudioSpec* GetAudioSpec() { return m_pAudioSpec; }

        virtual bool HandleEvent(IEvent* pEvent);

        //Mixes pBuf2 into pBuf1, sz refers to pBuf2's size
        static void MixBuffers(Sint16* pBuf1, Sint16* pBuf2, size_t sz);

        //SDL function that basically just calls the non static version.
        static void SDLAudioCallback(void *userdata, Uint8 *stream, int len);

        protected:
        void ApplyVolumeToStream(Sint16* pStream, size_t sz);
        struct SoundInstance
        {
                SoundInstance() : pSound(0), isPaused(true), isLooping(false) {}
                ISound* pSound;
                bool isPaused;
                bool isLooping;
                unsigned long position;
        };

        std::vector<ISound*> m_vSounds;
        std::vector<SoundInstance*> m_vInstances;

        unsigned long m_lastUpdate;
        SDL_AudioSpec* m_pAudioSpec;
        int m_volume;
};

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#endif

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