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# GEInterfaces.h Example File

demos/mobile/quickhit/ga_src/GEInterfaces.h

     /****************************************************************************
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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