leansdr::crc8_engine Struct Reference

#include <crc.h>

Public Member Functions
	crc8_engine ()
uint8_t	compute (const uint8_t *buf, int len)

Private Attributes
uint8_t	table [256]

Static Private Attributes
static const uint8_t	POLY_DVBS2_CRC8 = 0xd5

Detailed Description

Definition at line 29 of file crc.h.

Constructor & Destructor Documentation

crc8_engine()

leansdr::crc8_engine::crc8_engine ( )

inline

Definition at line 31 of file crc.h.

References POLY_DVBS2_CRC8, leansdr::shiftdivmod(), table, and leansdr::bitvect< T, N >::v.

    {
        // Precompute
        // EN 302 307-1 5.1.4 Figure 2
        bitvect<uint8_t, 8> g = POLY_DVBS2_CRC8;
        for (int u = 0; u < 256; ++u)
        {
            uint8_t u8 = u;
            bitvect<uint8_t, 8> c = shiftdivmod(&u8, 1, g);
            table[u] = c.v[0];
        }
    }

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Member Function Documentation

compute()

uint8_t leansdr::crc8_engine::compute ( const uint8_t *  buf, int  len  )

inline

Definition at line 43 of file crc.h.

References table.

    {
        uint8_t c = 0;
        for (; len--; ++buf)
            c = table[c ^ *buf];
        return c;
    }

Member Data Documentation

POLY_DVBS2_CRC8

const uint8_t leansdr::crc8_engine::POLY_DVBS2_CRC8 = 0xd5

staticprivate

Definition at line 52 of file crc.h.

Referenced by crc8_engine().

table

uint8_t leansdr::crc8_engine::table[256]

private

Definition at line 53 of file crc.h.

Referenced by compute(), and crc8_engine().

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

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