oscsincos.h

00001 namespace amakusa
00002 {
00003         /**
00004         * \brief Sine & Cosine Oscillator
00005         */
00006     class OSCSinCos
00007     {
00008     public:
00009             /**
00010             * \brief constructor
00011             * \param freq Frequency in Hz.
00012             * \param Fs Sampling frequency in Hz.
00013             */
00014         OSCSinCos( float freq, int Fs, int block_size );
00015             /**
00016             * \brief wave generator method
00017             * \param c Pointer to the buffer to output the sine signal.  
00018             * \param s Pointer to the buffer to output the cosine singal. If NULL, cosine signal will be skipped.
00019             * \params count Number of sample to be generated.
00020             */
00021         void run( float *s, float *c );
00022             /**
00023             * \brief wave generator method
00024             * \param c Pointer to the buffer to output the sine signal.  
00025             * \params count Number of sample to be generated.
00026             */
00027         void run( float *s ){run(s, 0);}
00028             /**
00029             * \brief set the oscillation furequncy.
00030             * \param freq Frequency in Hz.
00031             */
00032         void setFrequency( float freq );
00033             /**
00034             * \brief set the oscillator's internal phase
00035             * \param freq phase in radian.
00036             */
00037         void setPhase( float phase );        
00038             /**
00039             * \brief get the oscillation furequncy.
00040             * \returns Frequency in Hz.
00041             */
00042         float getFrequency();
00043             /**
00044             * \brief get the internal phase
00045             * \returns Phase in radian
00046             */
00047         float getPhase();
00048     private:
00049         float deltaPhase;   // deltaPhase per sample.
00050         int sampleFreq;     // in Hz
00051         int phaseInSample;  // internal phase [sample]
00052         int bs;             // blockSize
00053     };
00054         
00055 }
00056