Binaural.h

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#ifndef CSL_BINAURAL_H
#define CSL_BINAURAL_H

#include "BinauralDB.h"

#ifdef IPHONE
    #define SUM_DOWNS   1       // scale # blocks to sum   (16 / SUM_DOWNS)
    #define FFT_DOWNS   2       // scale IFFT len (FFT_DOWNS * blockSize)
    #define LEN_DOWNS   1       // scale sum len (513 / LEN_DOWNS)
#else
    #define SUM_DOWNS   1       // scale # blocks to sum   (16 / SUM_DOWNS)
    #define FFT_DOWNS   2       // scale IFFT len (FFT_DOWNS * blockSize)
    #define LEN_DOWNS   1       // scale sum len (513 / LEN_DOWNS)
#endif

namespace csl {

class BinauralSourceCache;                  


class BinauralPanner : public SpatialPanner {

public:
    BinauralPanner(unsigned blockSize = HRTF_BLOCK_SIZE);
    ~BinauralPanner();
    virtual void nextBuffer(Buffer &outputBuffer, unsigned outBufNum) throw (CException);

    unsigned mNumBlocks;                    
    unsigned mNumBlocksToSum;               
    unsigned mFramesPerBlock;               

protected:
    FFTWrapper mInFFT;                      
    FFTWrapper mOutFFT;
    
    Buffer mInBuf, mTmpBuf, mOutBuf;        
    
    SampleComplexVector mHOutL, mHOutR;     
    SampleBuffer mIFFTOutL, mIFFTOutR;      

    unsigned mBlockInd;                     
    BinauralSourceCache * cache();          
};



class BinauralSourceCache {
public:
    BinauralSourceCache(BinauralPanner *parent);
    ~BinauralSourceCache();

    SampleComplexVector *mInSpect;          
    SampleBuffer mPrevOutL, mPrevOutR;      
    unsigned *mHRTF;                        
    unsigned mNumBlocks;                    
};

} // end namespace

#endif

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