Hi all,
I am working on writing a new block(class). This block generates 4 streams
of sinusoid at different frequencies and each sinusoid is multiplied with
the 4 streams of float input respectively. The sinusoid are generated by
defining two struct type variables and do something with these two struct.
My question is, should I put the definition of these two struct in the body
of class as a private member? or should I define them out side of the class
parallel with smart pointer? (i.e. typedef boost::shared_ptr<lpi_itersum_ff>
lpi_itersum_ff_sptr;). What's the difference between puting the struct
definations inside and outside of the class?
Here's my current brief .h file. I am not sure it's acceptable or not. If
you find anything might lead the problem, please let me know. Any
suggestions will be very much appreciated.
--------------------------------- header
file------------------------------------
#ifndef INCLUDED_lpi_itersum_FF_H
#define INCLUDED_lpi_itersum_FF_H
#define PI (3.141592654)
#define FREQLO 32.0 /* Low frequency (linear) */
#define FREQHI 10000.0 /* High frequency (linear) */
#define DOUTGAIN 10.0 /* Standard output gain */
#include <gr_sync_block.h>
class lpi_itersum_ff;
typedef boost::shared_ptr<lpi_itersum_ff> lpi_itersum_ff_sptr;
typedef struct _RES {
float dA;
float dB;
float dC;
........
float dOmega;
} RES;
typedef struct _SIG {
int nSampsPerSec;
int nCutOff;
float dOutputGain;
float dT;
RES RTx[4];
} SIG;
lpi_itersum_ff_sptr lpi_make_itersum_ff ();
static SIG sig;
class lpi_itersum_ff : public gr_sync_block
{
friend lpi_itersum_ff_sptr lpi_make_itersum_ff ();
lpi_itersum_ff(float *dAmps);
public:
~lpi_itersum_ff(void);
int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif
--------------------------------- header
file------------------------------------
Thank you,
Milo
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