leansdr::simple_agc< T > Struct Template Reference

#include <sdr.h>

Inheritance diagram for leansdr::simple_agc< T >:

Collaboration diagram for leansdr::simple_agc< T >:

Public Member Functions
	simple_agc (scheduler *sch, pipebuf< complex< T >> &_in, pipebuf< complex< T >> &_out)
Public Member Functions inherited from leansdr::runnable
	runnable (scheduler *_sch, const char *name)
Public Member Functions inherited from leansdr::runnable_common
	runnable_common (const char *_name)
virtual	~runnable_common ()
virtual void	shutdown ()

Public Attributes
float	out_rms
float	bw
float	estimated
Public Attributes inherited from leansdr::runnable_common
const char *	name

Static Public Attributes
static const int	chunk_size = 128

Private Member Functions
void	run ()

Private Attributes
pipereader< complex< T > >	in
pipewriter< complex< T > >	out

Additional Inherited Members
Protected Attributes inherited from leansdr::runnable
scheduler *	sch

Detailed Description

template<typename T>
struct leansdr::simple_agc< T >

Definition at line 328 of file sdr.h.

Constructor & Destructor Documentation

simple_agc()

template<typename T >

leansdr::simple_agc< T >::simple_agc ( scheduler *  sch, pipebuf< complex< T >> &  _in, pipebuf< complex< T >> &  _out  )

inline

Definition at line 335 of file sdr.h.

                                          : runnable(sch, "AGC"),
                                            out_rms(1),
                                            bw(0.001),
                                            estimated(0),
                                            in(_in),
                                            out(_out, chunk_size)
    {
    }

Member Function Documentation

run()

template<typename T >

void leansdr::simple_agc< T >::run ( )

inlineprivatevirtual

Reimplemented from leansdr::runnable_common.

Definition at line 350 of file sdr.h.

References leansdr::auto_notch< T >::gain, leansdr::complex< T >::im, leansdr::pipereader< T >::rd(), leansdr::complex< T >::re, leansdr::pipereader< T >::read(), leansdr::pipereader< T >::readable(), leansdr::pipewriter< T >::wr(), leansdr::pipewriter< T >::writable(), and leansdr::pipewriter< T >::written().

    {
        while (in.readable() >= chunk_size && out.writable() >= chunk_size)
        {
            complex<T> *pin = in.rd(), *pend = pin + chunk_size;
            float amp2 = 0;

            for (; pin < pend; ++pin)
                amp2 += pin->re * pin->re + pin->im * pin->im;

            amp2 /= chunk_size;

            if (!estimated)
                estimated = amp2;

            estimated = estimated * (1 - bw) + amp2 * bw;
            float gain = estimated ? out_rms / sqrtf(estimated) : 0;
            pin = in.rd();
            complex<T> *pout = out.wr();
            float bwcomp = 1 - bw;

            for (; pin < pend; ++pin, ++pout)
            {
                pout->re = pin->re * gain;
                pout->im = pin->im * gain;
            }

            in.read(chunk_size);
            out.written(chunk_size);
        }
    }

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Member Data Documentation

bw

template<typename T >

float leansdr::simple_agc< T >::bw

Definition at line 331 of file sdr.h.

chunk_size

template<typename T >

const int leansdr::simple_agc< T >::chunk_size = 128

static

Definition at line 333 of file sdr.h.

estimated

template<typename T >

float leansdr::simple_agc< T >::estimated

Definition at line 332 of file sdr.h.

in

template<typename T >

pipereader<complex<T> > leansdr::simple_agc< T >::in

private

Definition at line 347 of file sdr.h.

out

template<typename T >

pipewriter<complex<T> > leansdr::simple_agc< T >::out

private

Definition at line 348 of file sdr.h.

out_rms

template<typename T >

float leansdr::simple_agc< T >::out_rms

Definition at line 330 of file sdr.h.

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The documentation for this struct was generated from the following file:

• plugins/channelrx/demoddatv/leansdr/sdr.h