GEAudioBuffer.h Example File

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 #ifndef __GE_IGA_AUDIOBUFFER__
 #define __GE_IGA_AUDIOBUFFER__

 #include <QFile>
 #include "GEInterfaces.h"

 namespace GE {

     class CAudioBufferPlayInstance;
     class CAudioBuffer;         // forward declaration
     typedef AUDIO_SAMPLE_TYPE(*SAMPLE_FUNCTION_TYPE)(CAudioBuffer *abuffer, int pos, int channel);

     class CAudioBuffer {            // container for a sound
     public:
         CAudioBuffer();
         virtual ~CAudioBuffer();

         static CAudioBuffer* loadWav( QString fileName );
         static CAudioBuffer* loadWav( FILE *wavFile );          // support for stdio
         void reallocate( int length );

         inline void* getRawData() { return m_data; }
         inline int getDataLength() { return m_dataLength; }

         inline int getBytesPerSample() { return (m_bitsPerSample>>3); }
         inline int getBitsPerSample() { return m_bitsPerSample; }
         inline int getSamplesPerSec() { return m_samplesPerSec; }
         inline short getNofChannels() { return m_nofChannels; }
         inline SAMPLE_FUNCTION_TYPE getSampleFunction() { return m_sampleFunction; }

         // static implementations of sample functions
         static AUDIO_SAMPLE_TYPE sampleFunction8bitMono( CAudioBuffer *abuffer, int pos, int channel );
         static AUDIO_SAMPLE_TYPE sampleFunction16bitMono( CAudioBuffer *abuffer, int pos, int channel );
         static AUDIO_SAMPLE_TYPE sampleFunction8bitStereo( CAudioBuffer *abuffer, int pos, int channel );
         static AUDIO_SAMPLE_TYPE sampleFunction16bitStereo( CAudioBuffer *abuffer, int pos, int channel );

         CAudioBufferPlayInstance *playWithMixer( GE::CAudioMixer &mixer );

     protected:
         SAMPLE_FUNCTION_TYPE m_sampleFunction;
         short m_nofChannels;
         void *m_data;
         int m_dataLength;                // in bytes
         short m_bitsPerSample;
         bool m_signedData;
         int m_samplesPerSec;
     };

     class CAudioBufferPlayInstance : public IAudioSource {
     public:
         CAudioBufferPlayInstance();
         CAudioBufferPlayInstance( CAudioBuffer *start_playing );
         virtual ~CAudioBufferPlayInstance();
         void playBuffer( CAudioBuffer *startPlaying, float volume, float fixedSpeed, int loopTimes = 0 );            // looptimes -1 = loop forever

         void setSpeed( float speed );
         void setLeftVolume( float lvol );
         void setRightVolume( float rvol );

         inline void setLoopTimes( int ltimes ) { m_loopTimes = ltimes; }
         void stop();

         int pullAudio( AUDIO_SAMPLE_TYPE *target, int bufferLength );
         bool canBeDestroyed();

         bool isPlaying() { if (m_buffer) return true; else return false; }
         inline bool isFinished() { return m_finished; }
         inline bool destroyWhenFinished() { return m_destroyWhenFinished; }
         inline void setDestroyWhenFinished( bool set ) { m_destroyWhenFinished = set; }

     protected:
         int mixBlock( AUDIO_SAMPLE_TYPE *target, int bufferLength );
         bool m_finished;
         bool m_destroyWhenFinished;
         int m_fixedPos;
         int m_fixedInc;

         int m_fixedLeftVolume;
         int m_fixedRightVolume;
         int m_fixedCenter;
         int m_loopTimes;
         CAudioBuffer *m_buffer;
     };

 };

 #endif