GEInterfaces.h Example File

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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