leansdr::convol_multipoly< Thist, HISTSIZE > Struct Template Reference

#include <convolutional.h>

Public Types
typedef u8	uncoded_byte
typedef u8	hardsymbol

Public Member Functions
	convol_multipoly ()
void	encode (const uncoded_byte *pin, hardsymbol *pout, int count)

Public Attributes
int	bits_in
int	bits_out
int	bps
const Thist *	polys

Private Attributes
Thist	hist
int	nhist
Thist	sersymb
int	nsersymb

Detailed Description

template<typename Thist, int HISTSIZE>
struct leansdr::convol_multipoly< Thist, HISTSIZE >

Definition at line 281 of file convolutional.h.

Member Typedef Documentation

hardsymbol

template<typename Thist, int HISTSIZE>

typedef u8 leansdr::convol_multipoly< Thist, HISTSIZE >::hardsymbol

Definition at line 284 of file convolutional.h.

uncoded_byte

template<typename Thist, int HISTSIZE>

typedef u8 leansdr::convol_multipoly< Thist, HISTSIZE >::uncoded_byte

Definition at line 283 of file convolutional.h.

Constructor & Destructor Documentation

convol_multipoly()

template<typename Thist, int HISTSIZE>

leansdr::convol_multipoly< Thist, HISTSIZE >::convol_multipoly ( )

inline

Definition at line 288 of file convolutional.h.

        : bits_in(0), bits_out(0), bps(0),
          hist(0), nhist(0), sersymb(0), nsersymb(0)
    {
    }

Member Function Documentation

encode()

template<typename Thist, int HISTSIZE>

void leansdr::convol_multipoly< Thist, HISTSIZE >::encode ( const uncoded_byte *  pin, hardsymbol *  pout, int  count  )

inline

Definition at line 294 of file convolutional.h.

    {
        if (!bits_in || !bits_out || !bps) {
            fatal("convol_multipoly not configured");
        }

        hardsymbol symbmask = (1 << bps) - 1;

        for (; count--; ++pin)
        {
            uncoded_byte b = *pin;

            for (int bit = 8; bit--;)
            {
                hist = (hist >> 1) | ((Thist)((b >> bit) & 1) << (HISTSIZE - 1));
                ++nhist;

                if (nhist == bits_in)
                {
                    for (int p = 0; p < bits_out; ++p)
                    {
                        int b = parity((Thist)(hist & polys[p]));
                        sersymb = (sersymb << 1) | b;
                    }

                    nhist = 0;
                    nsersymb += bits_out;

                    while (nsersymb >= bps)
                    {
                        hardsymbol s = (sersymb >> (nsersymb - bps)) & symbmask;
                        *pout++ = s;
                        nsersymb -= bps;
                    }
                }
            }
        }
        // Ensure deterministic output size
        // TBD We can relax this
        if (nhist || nsersymb) {
            fatal("partial run");
        }
    }

Member Data Documentation

bits_in

template<typename Thist, int HISTSIZE>

int leansdr::convol_multipoly< Thist, HISTSIZE >::bits_in

Definition at line 285 of file convolutional.h.

bits_out

template<typename Thist, int HISTSIZE>

int leansdr::convol_multipoly< Thist, HISTSIZE >::bits_out

Definition at line 285 of file convolutional.h.

bps

template<typename Thist, int HISTSIZE>

int leansdr::convol_multipoly< Thist, HISTSIZE >::bps

Definition at line 285 of file convolutional.h.

hist

template<typename Thist, int HISTSIZE>

Thist leansdr::convol_multipoly< Thist, HISTSIZE >::hist

private

Definition at line 339 of file convolutional.h.

nhist

template<typename Thist, int HISTSIZE>

int leansdr::convol_multipoly< Thist, HISTSIZE >::nhist

private

Definition at line 340 of file convolutional.h.

nsersymb

template<typename Thist, int HISTSIZE>

int leansdr::convol_multipoly< Thist, HISTSIZE >::nsersymb

private

Definition at line 342 of file convolutional.h.

polys

template<typename Thist, int HISTSIZE>

const Thist* leansdr::convol_multipoly< Thist, HISTSIZE >::polys

Definition at line 286 of file convolutional.h.

sersymb

template<typename Thist, int HISTSIZE>

Thist leansdr::convol_multipoly< Thist, HISTSIZE >::sersymb

private

Definition at line 341 of file convolutional.h.

---

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

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