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#ifndef __GE_IGA_INTERFACES__
#define __GE_IGA_INTERFACES__

#include <QMutex>

namespace GE {

#define AUDIO_FREQUENCY 22050
#define AUDIO_SAMPLE_TYPE short
#define AUDIO_SAMPLE_BITS 16

    class IAudioSource {
    public:
        IAudioSource();
        virtual ~IAudioSource();

        virtual int pullAudio( AUDIO_SAMPLE_TYPE *target, int bufferLength ) = 0;
        virtual bool canBeDestroyed() { return false; }

        IAudioSource *m_next;                // for listing, do not touch if you don't know what you are doing.
    };


    class CAudioMixer : public IAudioSource {
    public:
        CAudioMixer();
        virtual ~CAudioMixer();
        void destroyList();                        // destroy all the sources in the list


        IAudioSource* addAudioSource( IAudioSource *s );        // add new audio source to the list
        bool removeAudioSource( IAudioSource *s );                      // remove an audio source from the list
        int pullAudio( AUDIO_SAMPLE_TYPE *target, int bufferLength );
        void setGeneralVolume( float vol );


    protected:
        QMutex m_mutex;
        int m_fixedGeneralVolume;
        AUDIO_SAMPLE_TYPE *m_mixingBuffer;
        int m_mixingBufferLength;
        IAudioSource *m_sourceList;
    };

};


#endif