#include <dvbs2.h>

Public Member Functions
	s2_bbscrambling ()

void	transform (const uint8_t in, int bbsize, uint8_t out)

Private Attributes
uint8_t	pattern [58192]

Detailed Description

Definition at line 169 of file dvbs2.h.

Constructor & Destructor Documentation

◆ s2_bbscrambling()

leansdr::s2_bbscrambling::s2_bbscrambling ( )

inline

Definition at line 171 of file dvbs2.h.

References i.

     {
         uint16_t st = 0x00a9; // 000 0000 1010 1001  (Fig 5 reversed)
         for (int i = 0; i < sizeof(pattern); ++i)
         {
             uint8_t out = 0;
             for (int n = 8; n--;)
             {
                 int bit = ((st >> 13) ^ (st >> 14)) & 1; // Taps
                 out = (out << 1) | bit;                  // MSB first
                 st = (st << 1) | bit;                    // Feedback
             }
             pattern[i] = out;
         }
     }

Member Function Documentation

◆ transform()

void leansdr::s2_bbscrambling::transform	(	const uint8_t *	in,
		int	bbsize,
		uint8_t *	out
	)

inline

Definition at line 186 of file dvbs2.h.

References i.

     {
         for (int i = 0; i < bbsize; ++i)
             out[i] = in[i] ^ pattern[i];
     }

Member Data Documentation

◆ pattern

uint8_t leansdr::s2_bbscrambling::pattern[58192]

private

Definition at line 193 of file dvbs2.h.

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

plugins/channelrx/demoddatv/leansdr/dvbs2.h

Public Member Functions