2021-03-18 13:17:58 -04:00
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///////////////////////////////////////////////////////////////////////////////////
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2023-11-18 00:36:53 -05:00
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// Copyright (C) 2021 Jon Beniston, M7RCE <jon@beniston.com> //
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2021-03-18 13:17:58 -04:00
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "dvb-s.h"
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#include "util/popcount.h"
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#include <string.h>
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DVBS::DVBS() :
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m_prbsPacketCount(0),
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m_delayLine(0),
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m_punctureState(0),
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m_prevIQValid(false)
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{
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// Allocate memory for packet buffer
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m_packet = new uint8_t[rsPacketLen];
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// Allocate memory for interleaver FIFOs
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int unitSize = rsPacketLen/interleaveDepth;
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m_interleaveFIFO = new uint8_t *[interleaveDepth];
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m_interleaveLen = new int[interleaveDepth];
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m_interleaveIdx = new int[interleaveDepth];
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for (int i = 1; i < interleaveDepth; i++)
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{
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m_interleaveFIFO[i] = new uint8_t[unitSize*i]();
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m_interleaveLen[i] = unitSize*i;
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m_interleaveIdx[i] = 0;
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}
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}
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DVBS::~DVBS()
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{
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// Free interleaver FIFO memory
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for (int i = 1; i < interleaveDepth; i++)
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2021-04-28 10:39:07 -04:00
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delete[] m_interleaveFIFO[i];
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delete[] m_interleaveIdx;
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delete[] m_interleaveLen;
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delete[] m_interleaveFIFO;
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2021-03-18 13:17:58 -04:00
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// Free packet buffer
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2021-04-28 10:39:07 -04:00
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delete[] m_packet;
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2021-03-18 13:17:58 -04:00
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}
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// Scramble input packet (except for sync bytes) with psuedo random binary sequence
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// Initiliase PRBS sequence every 8 packets and invert sync byte
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void DVBS::scramble(const uint8_t *packetIn, uint8_t *packetOut)
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{
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if (m_prbsPacketCount == 0)
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{
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// Init
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m_prbsIdx = 0;
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// Invert sync byte to reset receiver
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packetOut[0] = ~tsSync;
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}
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else
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{
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// PRBS continues, but isn't applied to sync bytes 1-7
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m_prbsIdx++;
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packetOut[0] = tsSync;
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}
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m_prbsPacketCount++;
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if (m_prbsPacketCount == 8)
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m_prbsPacketCount = 0;
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// Apply PRBS to data
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for (int i = 1; i < tsPacketLen; i++)
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packetOut[i] = packetIn[i] ^ m_prbsLUT[m_prbsIdx++];
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}
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// RS(204,188,t=8) shortened code from RS(255,239,t=8) code
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// Using GF(2^8=256) so 1 symbol is 1 byte
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// Code generator polynomial: (x+l^0)(x+l^1)..(x+l^15) l=0x02
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// Field generator polynomial: x^8+x^4+x^3+x^2+1 (a primitive polynomial)
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2021-03-27 05:55:46 -04:00
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// Add 51 zero bytes before 188-byte packet to pad to 239 bytes, which are
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// discarded after RS encoding. They don't change the result so can just be ignored
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2021-03-18 13:17:58 -04:00
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// n=255 k=239
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// RS adds 2t = 16 bytes (n-k) after original data (so is systematic)
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// t=8 means we can correct 8 bytes if we don't know where the errors are
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// or 2t=16 errors if we do no where the errors are
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// https://en.wikiversity.org/wiki/Reed%E2%80%93Solomon_codes_for_coders
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// Galois field multiply
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uint8_t DVBS::gfMul(uint8_t a, uint8_t b)
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{
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if ((a == 0) || (b == 0))
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return 0;
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return m_gfExp[m_gfLog[a] + m_gfLog[b]];
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}
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// Reed Solomon encoder
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void DVBS::reedSolomon(uint8_t *packet)
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{
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2021-03-27 05:55:46 -04:00
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uint8_t tmp[rsK];
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const int partityBytesIdx = tsPacketLen;
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2021-03-18 13:17:58 -04:00
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// Copy in packet
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2021-03-27 05:55:46 -04:00
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memcpy(&tmp[0], packet, tsPacketLen);
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2021-03-18 13:17:58 -04:00
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// Zero parity bytes
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memset(&tmp[partityBytesIdx], 0, rs2T);
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2021-03-27 05:55:46 -04:00
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// Divide input by generator polynomial to compute parity bytes
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for (int i = 0; i < tsPacketLen; i++)
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2021-03-18 13:17:58 -04:00
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{
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uint8_t coef = tmp[i];
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if (coef != 0)
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{
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for (int j = 0; j < rs2T; j++)
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tmp[i+j+1] ^= gfMul(rsPoly[j], coef);
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}
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}
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// Append parity bytes to message
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memcpy(&packet[tsPacketLen], &tmp[partityBytesIdx], rs2T);
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}
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// Forney interleaver
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// We have interleaveDepth FIFOs, each of a different length, that the data is split between
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// FIFO n's length is n*rsPacketLen/interleaveDepth elements
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void DVBS::interleave(uint8_t *packet)
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{
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uint8_t *p = packet;
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for (int j = 0; j < rsPacketLen; j += interleaveDepth)
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{
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p++;
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for (int i = 1; i < interleaveDepth; i++)
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{
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uint8_t tmp = m_interleaveFIFO[i][m_interleaveIdx[i]];
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m_interleaveFIFO[i][m_interleaveIdx[i]] = *p;
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*p = tmp;
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m_interleaveIdx[i] = (m_interleaveIdx[i] + 1) % m_interleaveLen[i];
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p++;
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}
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}
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}
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// Convolution encoder
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// Rate 1/2 with puncturing
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// Constraint length K=7 G1=171 G2=133
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// Similar to CCSDS (without inversion of C2)
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// Using popcount is faster than state/output LUTs
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int DVBS::convolution(const uint8_t *packet, uint8_t *iq)
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{
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const int g1 = 0x79;
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const int g2 = 0x5b;
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const int k = 7;
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uint8_t *iqStart = iq;
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int bit;
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// Output byte left over from last frame
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if (m_prevIQValid)
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*iq++ = m_prevIQ;
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switch (m_codeRate)
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{
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case RATE_1_2:
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for (int i = 0; i < rsPacketLen; i++)
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{
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for (int j = 7; j >= 0; j--)
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{
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bit = (packet[i] >> j) & 1;
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m_delayLine = m_delayLine | (bit << (k-1));
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*iq++ = popcount(m_delayLine & g1) & 1;
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_delayLine >>= 1;
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}
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}
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break;
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case RATE_2_3:
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for (int i = 0; i < rsPacketLen; i++)
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{
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for (int j = 7; j >= 0; j--)
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{
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bit = (packet[i] >> j) & 1;
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m_delayLine = m_delayLine | (bit << (k-1));
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switch (m_punctureState)
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{
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case 0:
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*iq++ = popcount(m_delayLine & g1) & 1;
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState++;
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break;
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case 1:
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState = 0;
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break;
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}
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m_delayLine >>= 1;
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}
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}
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break;
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case RATE_3_4:
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for (int i = 0; i < rsPacketLen; i++)
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{
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for (int j = 7; j >= 0; j--)
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{
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bit = (packet[i] >> j) & 1;
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m_delayLine = m_delayLine | (bit << (k-1));
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switch (m_punctureState)
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{
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case 0:
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*iq++ = popcount(m_delayLine & g1) & 1;
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState++;
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break;
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case 1:
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState++;
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break;
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case 2:
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*iq++ = popcount(m_delayLine & g1) & 1;
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m_punctureState = 0;
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break;
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}
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m_delayLine >>= 1;
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}
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}
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break;
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case RATE_5_6:
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for (int i = 0; i < rsPacketLen; i++)
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{
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for (int j = 7; j >= 0; j--)
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{
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bit = (packet[i] >> j) & 1;
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m_delayLine = m_delayLine | (bit << (k-1));
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switch (m_punctureState)
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{
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case 0:
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*iq++ = popcount(m_delayLine & g1) & 1;
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState++;
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break;
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case 1:
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case 3:
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState++;
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break;
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case 2:
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*iq++ = popcount(m_delayLine & g1) & 1;
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m_punctureState++;
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break;
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case 4:
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*iq++ = popcount(m_delayLine & g1) & 1;
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m_punctureState = 0;
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break;
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}
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m_delayLine >>= 1;
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}
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}
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break;
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case RATE_7_8:
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for (int i = 0; i < rsPacketLen; i++)
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{
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for (int j = 7; j >= 0; j--)
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{
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bit = (packet[i] >> j) & 1;
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m_delayLine = m_delayLine | (bit << (k-1));
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switch (m_punctureState)
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{
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case 0:
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*iq++ = popcount(m_delayLine & g1) & 1;
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState++;
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break;
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case 1:
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case 2:
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case 3:
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case 5:
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*iq++ = popcount(m_delayLine & g2) & 1;
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m_punctureState++;
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break;
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case 4:
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*iq++ = popcount(m_delayLine & g1) & 1;
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m_punctureState++;
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break;
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case 6:
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*iq++ = popcount(m_delayLine & g1) & 1;
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m_punctureState = 0;
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break;
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}
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m_delayLine >>= 1;
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}
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}
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break;
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}
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int iqBytes = iq - iqStart;
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// If puncturing has left half a symbol, save it for next packet
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if (iqBytes & 1)
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{
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m_prevIQ = iq[-1];
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m_prevIQValid = true;
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}
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else
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m_prevIQValid = false;
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return iqBytes >> 1;
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}
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// Set convolution encoder forward error correction (FEC) code rate
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// Rate 1/2 = 1 input bit produces 2 output bits
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void DVBS::setCodeRate(CodeRate codeRate)
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{
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m_codeRate = codeRate;
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m_delayLine = 0;
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m_punctureState = 0;
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m_prevIQValid = false;
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}
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// DVB-S packet encoder.
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// Encode 188 byte MPEG transport stream to IQ symbols
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// IQ symbols are 0 or 1 and interleaved (I0, Q0, I1, Q1...)
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// Number of IQ symbols is returned from function and depends on FEC rate
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// Maximum number is (188+16)*8=1632 when FEC rate is 1/2
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// (This is IQ symbols, so 3264 elements needed in iq array)
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int DVBS::encode(const uint8_t *tsStreamPacket, uint8_t *iq)
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{
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scramble(tsStreamPacket, m_packet);
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reedSolomon(m_packet);
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interleave(m_packet);
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return convolution(m_packet, iq);
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}
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// Pseudo random sequence look-up table
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// Generated with RandomizeDVBS in util/lfsr.h
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const uint8_t DVBS::m_prbsLUT[tsPacketLen*8-1] =
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{
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0x03, 0xf6, 0x08, 0x34, 0x30, 0xb8, 0xa3, 0x93,
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0xc9, 0x68, 0xb7, 0x73, 0xb3, 0x29, 0xaa, 0xf5,
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0xfe, 0x3c, 0x04, 0x88, 0x1b, 0x30, 0x5a, 0xa1,
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0xdf, 0xc4, 0xc0, 0x9a, 0x83, 0x5f, 0x0b, 0xc2,
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0x38, 0x8c, 0x93, 0x2b, 0x6a, 0xfb, 0x7e, 0x1b,
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0x04, 0x5a, 0x19, 0xdc, 0x54, 0xc9, 0xfa, 0xb4,
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0x1f, 0xb8, 0x41, 0x91, 0x85, 0x65, 0x1f, 0x5e,
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0x43, 0xc5, 0x88, 0x9d, 0x33, 0x4e, 0xab, 0xa7,
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0xf9, 0xd0, 0x14, 0xe0, 0x7a, 0x41, 0x1d, 0x86,
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0x4d, 0x15, 0xae, 0x7d, 0xe5, 0x0c, 0x5e, 0x29,
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0xc4, 0xf4, 0x9a, 0x3b, 0x5c, 0x9b, 0xcb, 0x58,
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0xbb, 0xd3, 0x98, 0xe9, 0x52, 0x77, 0xed, 0x30,
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0x6e, 0xa1, 0x67, 0xc7, 0x50, 0x93, 0xe3, 0x68,
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0x4b, 0x71, 0xbb, 0x25, 0x9a, 0xdd, 0x5e, 0xcf,
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0xc6, 0xa0, 0x97, 0xc3, 0x70, 0x8b, 0x23, 0x3a,
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0xca, 0x9e, 0xbf, 0x47, 0x83, 0x91, 0x09, 0x66,
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0x37, 0x54, 0xb3, 0xfb, 0xa8, 0x19, 0xf0, 0x54,
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0x21, 0xf8, 0xc4, 0x12, 0x98, 0x6f, 0x51, 0x63,
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0xe7, 0x48, 0x53, 0xb1, 0xe9, 0xa4, 0x75, 0xd9,
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0x3c, 0xd6, 0x8a, 0xf7, 0x3e, 0x32, 0x84, 0xaf,
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0x1b, 0xe2, 0x58, 0x4d, 0xd1, 0xac, 0xe5, 0xea,
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0x5c, 0x7d, 0xc9, 0x0c, 0xb6, 0x2b, 0xb4, 0xf9,
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0xba, 0x15, 0x9c, 0x7d, 0x49, 0x0f, 0xb6, 0x21,
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0xb4, 0xc5, 0xba, 0x9d, 0x9f, 0x4d, 0x43, 0xaf,
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0x89, 0xe1, 0x34, 0x46, 0xb9, 0x97, 0x95, 0x71,
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0x7f, 0x27, 0x02, 0xd2, 0x0e, 0xec, 0x26, 0x68,
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0xd5, 0x72, 0xff, 0x2e, 0x02, 0xe4, 0x0e, 0x58,
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0x25, 0xd0, 0xdc, 0xe2, 0xca, 0x4e, 0xbd, 0xa7,
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0x8d, 0xd1, 0x2c, 0xe6, 0xea, 0x56, 0x7d, 0xf5,
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0x0c, 0x3e, 0x28, 0x84, 0xf3, 0x1a, 0x2a, 0x5c,
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0xfd, 0xca, 0x0c, 0xbc, 0x2b, 0x88, 0xf9, 0x32,
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0x16, 0xac, 0x77, 0xe9, 0x30, 0x76, 0xa1, 0x37,
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0xc6, 0xb0, 0x97, 0xa3, 0x71, 0xcb, 0x24, 0xba,
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0xdb, 0x9e, 0xd9, 0x46, 0xd7, 0x96, 0xf1, 0x76,
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0x27, 0x34, 0xd2, 0xba, 0xef, 0x9e, 0x61, 0x45,
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0x47, 0x9f, 0x91, 0x41, 0x67, 0x87, 0x51, 0x13,
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0xe6, 0x68, 0x55, 0x71, 0xff, 0x24, 0x02, 0xd8,
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0x0e, 0xd0, 0x26, 0xe0, 0xd6, 0x42, 0xf5, 0x8e,
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0x3d, 0x24, 0x8e, 0xdb, 0x26, 0xda, 0xd6, 0xde,
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0xf6, 0xc6, 0x36, 0x94, 0xb7, 0x7b, 0xb3, 0x19,
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0xaa, 0x55, 0xfd, 0xfc, 0x0c, 0x08, 0x28, 0x30,
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0xf0, 0xa2, 0x23, 0xcc, 0xc8, 0xaa, 0xb3, 0xff,
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0xa8, 0x01, 0xf0, 0x04, 0x20, 0x18, 0xc0, 0x52,
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0x81, 0xef, 0x04, 0x62, 0x19, 0x4c, 0x57, 0xa9,
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0xf1, 0xf4, 0x24, 0x38, 0xd8, 0x92, 0xd3, 0x6e,
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0xeb, 0x66, 0x7b, 0x55, 0x1b, 0xfe, 0x58, 0x05,
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0xd0, 0x1c, 0xe0, 0x4a, 0x41, 0xbd, 0x85, 0x8d,
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0x1d, 0x2e, 0x4e, 0xe5, 0xa6, 0x5d, 0xd5, 0xcc,
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0xfc, 0xaa, 0x0b, 0xfc, 0x38, 0x08, 0x90, 0x33,
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0x60, 0xab, 0x43, 0xfb, 0x88, 0x19, 0x30, 0x56,
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0xa1, 0xf7, 0xc4, 0x30, 0x98, 0xa3, 0x53, 0xcb,
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0xe8, 0xb8, 0x73, 0x91, 0x29, 0x66, 0xf7, 0x56,
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0x33, 0xf4, 0xa8, 0x3b, 0xf0, 0x98, 0x23, 0x50,
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0xcb, 0xe2, 0xb8, 0x4f, 0x91, 0xa1, 0x65, 0xc7,
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0x5c, 0x93, 0xcb, 0x68, 0xbb, 0x73, 0x9b, 0x29,
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0x5a, 0xf7, 0xde, 0x30, 0xc4, 0xa2, 0x9b, 0xcf,
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0x58, 0xa3, 0xd3, 0xc8, 0xe8, 0xb2, 0x73, 0xad,
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0x29, 0xee, 0xf4, 0x66, 0x39, 0x54, 0x97, 0xfb,
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0x70, 0x1b, 0x20, 0x5a, 0xc1, 0xde, 0x84, 0xc7,
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0x1a, 0x92, 0x5f, 0x6d, 0xc3, 0x6c, 0x8b, 0x6b,
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0x3b, 0x7a, 0x9b, 0x1f, 0x5a, 0x43, 0xdd, 0x88,
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0xcd, 0x32, 0xae, 0xaf, 0xe7, 0xe0, 0x50, 0x41,
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0xe1, 0x84, 0x45, 0x19, 0x9e, 0x55, 0x45, 0xff,
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0x9c, 0x01, 0x48, 0x07, 0xb0, 0x11, 0xa0, 0x65,
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0xc1, 0x5c, 0x87, 0xcb, 0x10, 0xba, 0x63, 0x9d,
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0x49, 0x4f, 0xb7, 0xa1, 0xb1, 0xc5, 0xa4, 0x9d,
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0xdb, 0x4c, 0xdb, 0xaa, 0xd9, 0xfe, 0xd4, 0x06,
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0xf8, 0x16, 0x10, 0x74, 0x61, 0x39, 0x46, 0x97,
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0x97, 0x71, 0x73, 0x27, 0x2a, 0xd2, 0xfe, 0xee,
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0x06, 0x64, 0x15, 0x58, 0x7f, 0xd1, 0x00, 0xe6,
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0x02, 0x54, 0x0d, 0xf8, 0x2c, 0x10, 0xe8, 0x62,
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0x71, 0x4d, 0x27, 0xae, 0xd1, 0xe6, 0xe4, 0x56,
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0x59, 0xf5, 0xd4, 0x3c, 0xf8, 0x8a, 0x13, 0x3c,
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0x6a, 0x89, 0x7f, 0x37, 0x02, 0xb2, 0x0f, 0xac,
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0x21, 0xe8, 0xc4, 0x72, 0x99, 0x2f, 0x56, 0xe3,
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0xf6, 0x48, 0x35, 0xb0, 0xbd, 0xa3, 0x8d, 0xc9,
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0x2c, 0xb6, 0xeb, 0xb6, 0x79, 0xb5, 0x15, 0xbe,
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0x7d, 0x85, 0x0d, 0x1e, 0x2e, 0x44, 0xe5, 0x9a,
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0x5d, 0x5d, 0xcf, 0xcc, 0xa0, 0xab, 0xc3, 0xf8,
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0x88, 0x13, 0x30, 0x6a, 0xa1, 0x7f, 0xc7, 0x00,
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0x92, 0x03, 0x6c, 0x0b, 0x68, 0x3b, 0x70, 0x9b,
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0x23, 0x5a, 0xcb, 0xde, 0xb8, 0xc7, 0x92, 0x91,
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0x6f, 0x67, 0x63, 0x53, 0x4b, 0xeb, 0xb8, 0x79,
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0x91, 0x15, 0x66, 0x7f, 0x55, 0x03, 0xfe, 0x08,
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0x04, 0x30, 0x18, 0xa0, 0x53, 0xc1, 0xe8, 0x84,
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0x73, 0x19, 0x2a, 0x56, 0xfd, 0xf6, 0x0c, 0x34,
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0x28, 0xb8, 0xf3, 0x92, 0x29, 0x6c, 0xf7, 0x6a,
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0x33, 0x7c, 0xab, 0x0b, 0xfa, 0x38, 0x1c, 0x90,
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0x4b, 0x61, 0xbb, 0x45, 0x9b, 0x9d, 0x59, 0x4f,
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0xd7, 0xa0, 0xf1, 0xc2, 0x24, 0x8c, 0xdb, 0x2a,
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0xda, 0xfe, 0xde, 0x06, 0xc4, 0x16, 0x98, 0x77,
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0x51, 0x33, 0xe6, 0xa8, 0x57, 0xf1, 0xf0, 0x24,
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0x20, 0xd8, 0xc2, 0xd2, 0x8e, 0xef, 0x26, 0x62,
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0xd5, 0x4e, 0xff, 0xa6, 0x01, 0xd4, 0x04, 0xf8,
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0x1a, 0x10, 0x5c, 0x61, 0xc9, 0x44, 0xb7, 0x9b,
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0xb1, 0x59, 0xa7, 0xd5, 0xd0, 0xfc, 0xe2, 0x0a,
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0x4c, 0x3d, 0xa8, 0x8d, 0xf3, 0x2c, 0x2a, 0xe8,
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0xfe, 0x72, 0x05, 0x2c, 0x1e, 0xe8, 0x46, 0x71,
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0x95, 0x25, 0x7e, 0xdf, 0x06, 0xc2, 0x16, 0x8c,
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0x77, 0x29, 0x32, 0xf6, 0xae, 0x37, 0xe4, 0xb0,
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0x5b, 0xa1, 0xd9, 0xc4, 0xd4, 0x9a, 0xfb, 0x5e,
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0x1b, 0xc4, 0x58, 0x99, 0xd3, 0x54, 0xeb, 0xfa,
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0x78, 0x1d, 0x10, 0x4e, 0x61, 0xa5, 0x45, 0xdf,
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0x9c, 0xc1, 0x4a, 0x87, 0xbf, 0x11, 0x82, 0x65,
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0x0d, 0x5e, 0x2f, 0xc4, 0xe0, 0x9a, 0x43, 0x5d,
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0x8b, 0xcd, 0x38, 0xae, 0x93, 0xe7, 0x68, 0x53,
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0x71, 0xeb, 0x24, 0x7a, 0xd9, 0x1e, 0xd6, 0x46,
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0xf5, 0x96, 0x3d, 0x74, 0x8f, 0x3b, 0x22, 0x9a,
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0xcf, 0x5e, 0xa3, 0xc7, 0xc8, 0x90, 0xb3, 0x63,
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0xab, 0x49, 0xfb, 0xb4, 0x19, 0xb8, 0x55, 0x91,
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0xfd, 0x64, 0x0f, 0x58, 0x23, 0xd0, 0xc8, 0xe2,
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0xb2, 0x4f, 0xad, 0xa1, 0xed, 0xc4, 0x6c, 0x99,
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0x6b, 0x57, 0x7b, 0xf3, 0x18, 0x2a, 0x50, 0xfd,
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0xe2, 0x0c, 0x4c, 0x29, 0xa8, 0xf5, 0xf2, 0x3c,
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0x2c, 0x88, 0xeb, 0x32, 0x7a, 0xad, 0x1f, 0xee,
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0x40, 0x65, 0x81, 0x5d, 0x07, 0xce, 0x10, 0xa4,
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0x63, 0xd9, 0x48, 0xd7, 0xb2, 0xf1, 0xae, 0x25,
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0xe4, 0xdc, 0x5a, 0xc9, 0xde, 0xb4, 0xc7, 0xba,
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0x91, 0x9f, 0x65, 0x43, 0x5f, 0x8b, 0xc1, 0x38,
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0x86, 0x93, 0x17, 0x6a, 0x73, 0x7d, 0x2b, 0x0e,
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0xfa, 0x26, 0x1c, 0xd4, 0x4a, 0xf9, 0xbe, 0x15,
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0x84, 0x7d, 0x19, 0x0e, 0x56, 0x25, 0xf4, 0xdc,
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0x3a, 0xc8, 0x9e, 0xb3, 0x47, 0xab, 0x91, 0xf9,
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0x64, 0x17, 0x58, 0x73, 0xd1, 0x28, 0xe6, 0xf2,
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0x56, 0x2d, 0xf4, 0xec, 0x3a, 0x68, 0x9d, 0x73,
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0x4f, 0x2b, 0xa2, 0xf9, 0xce, 0x14, 0xa4, 0x7b,
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0xd9, 0x18, 0xd6, 0x52, 0xf5, 0xee, 0x3c, 0x64,
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0x89, 0x5b, 0x37, 0xda, 0xb0, 0xdf, 0xa2, 0xc1,
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0xce, 0x84, 0xa7, 0x1b, 0xd2, 0x58, 0xed, 0xd2,
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0x6c, 0xed, 0x6a, 0x6f, 0x7d, 0x63, 0x0f, 0x4a,
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0x23, 0xbc, 0xc9, 0x8a, 0xb5, 0x3f, 0xbe, 0x81,
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0x87, 0x05, 0x12, 0x1e, 0x6c, 0x45, 0x69, 0x9f,
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0x75, 0x43, 0x3f, 0x8a, 0x81, 0x3f, 0x06, 0x82,
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0x17, 0x0c, 0x72, 0x29, 0x2c, 0xf6, 0xea, 0x36,
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0x7c, 0xb5, 0x0b, 0xbe, 0x39, 0x84, 0x95, 0x1b,
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0x7e, 0x5b, 0x05, 0xda, 0x1c, 0xdc, 0x4a, 0xc9,
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0xbe, 0xb5, 0x87, 0xbd, 0x11, 0x8e, 0x65, 0x25,
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0x5e, 0xdf, 0xc6, 0xc0, 0x96, 0x83, 0x77, 0x0b,
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0x32, 0x3a, 0xac, 0x9f, 0xeb, 0x40, 0x7b, 0x81,
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0x19, 0x06, 0x56, 0x15, 0xf4, 0x7c, 0x39, 0x08,
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0x96, 0x33, 0x74, 0xab, 0x3b, 0xfa, 0x98, 0x1f,
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0x50, 0x43, 0xe1, 0x88, 0x45, 0x31, 0x9e, 0xa5,
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0x47, 0xdf, 0x90, 0xc1, 0x62, 0x87, 0x4f, 0x13,
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0xa2, 0x69, 0xcd, 0x74, 0xaf, 0x3b, 0xe2, 0x98,
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0x4f, 0x51, 0xa3, 0xe5, 0xc8, 0x5c, 0xb1, 0xcb,
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0xa4, 0xb9, 0xdb, 0x94, 0xd9, 0x7a, 0xd7, 0x1e,
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0xf2, 0x46, 0x2d, 0x94, 0xed, 0x7a, 0x6f, 0x1d,
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0x62, 0x4f, 0x4d, 0xa3, 0xad, 0xc9, 0xec, 0xb4,
|
|
|
|
|
0x6b, 0xb9, 0x79, 0x97, 0x15, 0x72, 0x7f, 0x2d,
|
|
|
|
|
0x02, 0xee, 0x0e, 0x64, 0x25, 0x58, 0xdf, 0xd2,
|
|
|
|
|
0xc0, 0xee, 0x82, 0x67, 0x0d, 0x52, 0x2f, 0xec,
|
|
|
|
|
0xe0, 0x6a, 0x41, 0x7d, 0x87, 0x0d, 0x12, 0x2e,
|
|
|
|
|
0x6c, 0xe5, 0x6a, 0x5f, 0x7d, 0xc3, 0x0c, 0x8a,
|
|
|
|
|
0x2b, 0x3c, 0xfa, 0x8a, 0x1f, 0x3c, 0x42, 0x89,
|
|
|
|
|
0x8f, 0x35, 0x22, 0xbe, 0xcf, 0x86, 0xa1, 0x17,
|
|
|
|
|
0xc6, 0x70, 0x95, 0x23, 0x7e, 0xcb, 0x06, 0xba,
|
|
|
|
|
0x17, 0x9c, 0x71, 0x49, 0x27, 0xb6, 0xd1, 0xb6,
|
|
|
|
|
0xe5, 0xb6, 0x5d, 0xb5, 0xcd, 0xbc, 0xad, 0x8b,
|
|
|
|
|
0xed, 0x38, 0x6e, 0x91, 0x67, 0x67, 0x53, 0x53,
|
|
|
|
|
0xeb, 0xe8, 0x78, 0x71, 0x11, 0x26, 0x66, 0xd5,
|
|
|
|
|
0x56, 0xff, 0xf6, 0x00, 0x34, 0x00, 0xb8, 0x03,
|
|
|
|
|
0x90, 0x09, 0x60, 0x37, 0x40, 0xb3, 0x83, 0xa9,
|
|
|
|
|
0x09, 0xf6, 0x34, 0x34, 0xb8, 0xbb, 0x93, 0x99,
|
|
|
|
|
0x69, 0x57, 0x77, 0xf3, 0x30, 0x2a, 0xa0, 0xff,
|
|
|
|
|
0xc2, 0x00, 0x8c, 0x03, 0x28, 0x0a, 0xf0, 0x3e,
|
|
|
|
|
0x20, 0x84, 0xc3, 0x1a, 0x8a, 0x5f, 0x3d, 0xc2,
|
|
|
|
|
0x8c, 0x8f, 0x2b, 0x22, 0xfa, 0xce, 0x1e, 0xa4,
|
|
|
|
|
0x47, 0xd9, 0x90, 0xd5, 0x62, 0xff, 0x4e, 0x03,
|
|
|
|
|
0xa4, 0x09, 0xd8, 0x34, 0xd0, 0xba, 0xe3, 0x9e,
|
|
|
|
|
0x49, 0x45, 0xb7, 0x9d, 0xb1, 0x4d, 0xa7, 0xad,
|
|
|
|
|
0xd1, 0xec, 0xe4, 0x6a, 0x59, 0x7d, 0xd7, 0x0c,
|
|
|
|
|
0xf2, 0x2a, 0x2c, 0xfc, 0xea, 0x0a, 0x7c, 0x3d,
|
|
|
|
|
0x08, 0x8e, 0x33, 0x24, 0xaa, 0xdb, 0xfe, 0xd8,
|
|
|
|
|
0x06, 0xd0, 0x16, 0xe0, 0x76, 0x41, 0x35, 0x86,
|
|
|
|
|
0xbd, 0x17, 0x8e, 0x71, 0x25, 0x26, 0xde, 0xd6,
|
|
|
|
|
0xc6, 0xf6, 0x96, 0x37, 0x74, 0xb3, 0x3b, 0xaa,
|
|
|
|
|
0x99, 0xff, 0x54, 0x03, 0xf8, 0x08, 0x10, 0x30,
|
|
|
|
|
0x60, 0xa1, 0x43, 0xc7, 0x88, 0x91, 0x33, 0x66,
|
|
|
|
|
0xab, 0x57, 0xfb, 0xf0, 0x18, 0x20, 0x50, 0xc1,
|
|
|
|
|
0xe2, 0x84, 0x4f, 0x19, 0xa2, 0x55, 0xcd, 0xfc,
|
|
|
|
|
0xac, 0x0b, 0xe8, 0x38, 0x70, 0x91, 0x23, 0x66,
|
|
|
|
|
0xcb, 0x56, 0xbb, 0xf7, 0x98, 0x31, 0x50, 0xa7,
|
|
|
|
|
0xe3, 0xd0, 0x48, 0xe1, 0xb2, 0x45, 0xad, 0x9d,
|
|
|
|
|
0xed, 0x4c, 0x6f, 0xa9, 0x61, 0xf7, 0x44, 0x33,
|
|
|
|
|
0x98, 0xa9, 0x53, 0xf7, 0xe8, 0x30, 0x70, 0xa1,
|
|
|
|
|
0x23, 0xc6, 0xc8, 0x96, 0xb3, 0x77, 0xab, 0x31,
|
|
|
|
|
0xfa, 0xa4, 0x1f, 0xd8, 0x40, 0xd1, 0x82, 0xe5,
|
|
|
|
|
0x0e, 0x5e, 0x25, 0xc4, 0xdc, 0x9a, 0xcb,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
// Generator polynmoial
|
|
|
|
|
const uint8_t DVBS::rsPoly[DVBS::rs2T] =
|
|
|
|
|
{
|
|
|
|
|
59, 13, 104, 189, 68, 209, 30, 8, 163, 65, 41, 229, 98, 50, 36, 59
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
// Galios Field logarithm
|
|
|
|
|
const uint8_t DVBS::m_gfLog[256] =
|
|
|
|
|
{
|
|
|
|
|
0x00, 0x00, 0x01, 0x19, 0x02, 0x32, 0x1a, 0xc6,
|
|
|
|
|
0x03, 0xdf, 0x33, 0xee, 0x1b, 0x68, 0xc7, 0x4b,
|
|
|
|
|
0x04, 0x64, 0xe0, 0x0e, 0x34, 0x8d, 0xef, 0x81,
|
|
|
|
|
0x1c, 0xc1, 0x69, 0xf8, 0xc8, 0x08, 0x4c, 0x71,
|
|
|
|
|
0x05, 0x8a, 0x65, 0x2f, 0xe1, 0x24, 0x0f, 0x21,
|
|
|
|
|
0x35, 0x93, 0x8e, 0xda, 0xf0, 0x12, 0x82, 0x45,
|
|
|
|
|
0x1d, 0xb5, 0xc2, 0x7d, 0x6a, 0x27, 0xf9, 0xb9,
|
|
|
|
|
0xc9, 0x9a, 0x09, 0x78, 0x4d, 0xe4, 0x72, 0xa6,
|
|
|
|
|
0x06, 0xbf, 0x8b, 0x62, 0x66, 0xdd, 0x30, 0xfd,
|
|
|
|
|
0xe2, 0x98, 0x25, 0xb3, 0x10, 0x91, 0x22, 0x88,
|
|
|
|
|
0x36, 0xd0, 0x94, 0xce, 0x8f, 0x96, 0xdb, 0xbd,
|
|
|
|
|
0xf1, 0xd2, 0x13, 0x5c, 0x83, 0x38, 0x46, 0x40,
|
|
|
|
|
0x1e, 0x42, 0xb6, 0xa3, 0xc3, 0x48, 0x7e, 0x6e,
|
|
|
|
|
0x6b, 0x3a, 0x28, 0x54, 0xfa, 0x85, 0xba, 0x3d,
|
|
|
|
|
0xca, 0x5e, 0x9b, 0x9f, 0x0a, 0x15, 0x79, 0x2b,
|
|
|
|
|
0x4e, 0xd4, 0xe5, 0xac, 0x73, 0xf3, 0xa7, 0x57,
|
|
|
|
|
0x07, 0x70, 0xc0, 0xf7, 0x8c, 0x80, 0x63, 0x0d,
|
|
|
|
|
0x67, 0x4a, 0xde, 0xed, 0x31, 0xc5, 0xfe, 0x18,
|
|
|
|
|
0xe3, 0xa5, 0x99, 0x77, 0x26, 0xb8, 0xb4, 0x7c,
|
|
|
|
|
0x11, 0x44, 0x92, 0xd9, 0x23, 0x20, 0x89, 0x2e,
|
|
|
|
|
0x37, 0x3f, 0xd1, 0x5b, 0x95, 0xbc, 0xcf, 0xcd,
|
|
|
|
|
0x90, 0x87, 0x97, 0xb2, 0xdc, 0xfc, 0xbe, 0x61,
|
|
|
|
|
0xf2, 0x56, 0xd3, 0xab, 0x14, 0x2a, 0x5d, 0x9e,
|
|
|
|
|
0x84, 0x3c, 0x39, 0x53, 0x47, 0x6d, 0x41, 0xa2,
|
|
|
|
|
0x1f, 0x2d, 0x43, 0xd8, 0xb7, 0x7b, 0xa4, 0x76,
|
|
|
|
|
0xc4, 0x17, 0x49, 0xec, 0x7f, 0x0c, 0x6f, 0xf6,
|
|
|
|
|
0x6c, 0xa1, 0x3b, 0x52, 0x29, 0x9d, 0x55, 0xaa,
|
|
|
|
|
0xfb, 0x60, 0x86, 0xb1, 0xbb, 0xcc, 0x3e, 0x5a,
|
|
|
|
|
0xcb, 0x59, 0x5f, 0xb0, 0x9c, 0xa9, 0xa0, 0x51,
|
|
|
|
|
0x0b, 0xf5, 0x16, 0xeb, 0x7a, 0x75, 0x2c, 0xd7,
|
|
|
|
|
0x4f, 0xae, 0xd5, 0xe9, 0xe6, 0xe7, 0xad, 0xe8,
|
|
|
|
|
0x74, 0xd6, 0xf4, 0xea, 0xa8, 0x50, 0x58, 0xaf
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
// Galios Field exponent
|
|
|
|
|
const uint8_t DVBS::m_gfExp[512] =
|
|
|
|
|
{
|
|
|
|
|
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80,
|
|
|
|
|
0x1d, 0x3a, 0x74, 0xe8, 0xcd, 0x87, 0x13, 0x26,
|
|
|
|
|
0x4c, 0x98, 0x2d, 0x5a, 0xb4, 0x75, 0xea, 0xc9,
|
|
|
|
|
0x8f, 0x03, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0,
|
|
|
|
|
0x9d, 0x27, 0x4e, 0x9c, 0x25, 0x4a, 0x94, 0x35,
|
|
|
|
|
0x6a, 0xd4, 0xb5, 0x77, 0xee, 0xc1, 0x9f, 0x23,
|
|
|
|
|
0x46, 0x8c, 0x05, 0x0a, 0x14, 0x28, 0x50, 0xa0,
|
|
|
|
|
0x5d, 0xba, 0x69, 0xd2, 0xb9, 0x6f, 0xde, 0xa1,
|
|
|
|
|
0x5f, 0xbe, 0x61, 0xc2, 0x99, 0x2f, 0x5e, 0xbc,
|
|
|
|
|
0x65, 0xca, 0x89, 0x0f, 0x1e, 0x3c, 0x78, 0xf0,
|
|
|
|
|
0xfd, 0xe7, 0xd3, 0xbb, 0x6b, 0xd6, 0xb1, 0x7f,
|
|
|
|
|
0xfe, 0xe1, 0xdf, 0xa3, 0x5b, 0xb6, 0x71, 0xe2,
|
|
|
|
|
0xd9, 0xaf, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88,
|
|
|
|
|
0x0d, 0x1a, 0x34, 0x68, 0xd0, 0xbd, 0x67, 0xce,
|
|
|
|
|
0x81, 0x1f, 0x3e, 0x7c, 0xf8, 0xed, 0xc7, 0x93,
|
|
|
|
|
0x3b, 0x76, 0xec, 0xc5, 0x97, 0x33, 0x66, 0xcc,
|
|
|
|
|
0x85, 0x17, 0x2e, 0x5c, 0xb8, 0x6d, 0xda, 0xa9,
|
|
|
|
|
0x4f, 0x9e, 0x21, 0x42, 0x84, 0x15, 0x2a, 0x54,
|
|
|
|
|
0xa8, 0x4d, 0x9a, 0x29, 0x52, 0xa4, 0x55, 0xaa,
|
|
|
|
|
0x49, 0x92, 0x39, 0x72, 0xe4, 0xd5, 0xb7, 0x73,
|
|
|
|
|
0xe6, 0xd1, 0xbf, 0x63, 0xc6, 0x91, 0x3f, 0x7e,
|
|
|
|
|
0xfc, 0xe5, 0xd7, 0xb3, 0x7b, 0xf6, 0xf1, 0xff,
|
|
|
|
|
0xe3, 0xdb, 0xab, 0x4b, 0x96, 0x31, 0x62, 0xc4,
|
|
|
|
|
0x95, 0x37, 0x6e, 0xdc, 0xa5, 0x57, 0xae, 0x41,
|
|
|
|
|
0x82, 0x19, 0x32, 0x64, 0xc8, 0x8d, 0x07, 0x0e,
|
|
|
|
|
0x1c, 0x38, 0x70, 0xe0, 0xdd, 0xa7, 0x53, 0xa6,
|
|
|
|
|
0x51, 0xa2, 0x59, 0xb2, 0x79, 0xf2, 0xf9, 0xef,
|
|
|
|
|
0xc3, 0x9b, 0x2b, 0x56, 0xac, 0x45, 0x8a, 0x09,
|
|
|
|
|
0x12, 0x24, 0x48, 0x90, 0x3d, 0x7a, 0xf4, 0xf5,
|
|
|
|
|
0xf7, 0xf3, 0xfb, 0xeb, 0xcb, 0x8b, 0x0b, 0x16,
|
|
|
|
|
0x2c, 0x58, 0xb0, 0x7d, 0xfa, 0xe9, 0xcf, 0x83,
|
|
|
|
|
0x1b, 0x36, 0x6c, 0xd8, 0xad, 0x47, 0x8e, 0x01,
|
|
|
|
|
0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1d,
|
|
|
|
|
0x3a, 0x74, 0xe8, 0xcd, 0x87, 0x13, 0x26, 0x4c,
|
|
|
|
|
0x98, 0x2d, 0x5a, 0xb4, 0x75, 0xea, 0xc9, 0x8f,
|
|
|
|
|
0x03, 0x06, 0x0c, 0x18, 0x30, 0x60, 0xc0, 0x9d,
|
|
|
|
|
0x27, 0x4e, 0x9c, 0x25, 0x4a, 0x94, 0x35, 0x6a,
|
|
|
|
|
0xd4, 0xb5, 0x77, 0xee, 0xc1, 0x9f, 0x23, 0x46,
|
|
|
|
|
0x8c, 0x05, 0x0a, 0x14, 0x28, 0x50, 0xa0, 0x5d,
|
|
|
|
|
0xba, 0x69, 0xd2, 0xb9, 0x6f, 0xde, 0xa1, 0x5f,
|
|
|
|
|
0xbe, 0x61, 0xc2, 0x99, 0x2f, 0x5e, 0xbc, 0x65,
|
|
|
|
|
0xca, 0x89, 0x0f, 0x1e, 0x3c, 0x78, 0xf0, 0xfd,
|
|
|
|
|
0xe7, 0xd3, 0xbb, 0x6b, 0xd6, 0xb1, 0x7f, 0xfe,
|
|
|
|
|
0xe1, 0xdf, 0xa3, 0x5b, 0xb6, 0x71, 0xe2, 0xd9,
|
|
|
|
|
0xaf, 0x43, 0x86, 0x11, 0x22, 0x44, 0x88, 0x0d,
|
|
|
|
|
0x1a, 0x34, 0x68, 0xd0, 0xbd, 0x67, 0xce, 0x81,
|
|
|
|
|
0x1f, 0x3e, 0x7c, 0xf8, 0xed, 0xc7, 0x93, 0x3b,
|
|
|
|
|
0x76, 0xec, 0xc5, 0x97, 0x33, 0x66, 0xcc, 0x85,
|
|
|
|
|
0x17, 0x2e, 0x5c, 0xb8, 0x6d, 0xda, 0xa9, 0x4f,
|
|
|
|
|
0x9e, 0x21, 0x42, 0x84, 0x15, 0x2a, 0x54, 0xa8,
|
|
|
|
|
0x4d, 0x9a, 0x29, 0x52, 0xa4, 0x55, 0xaa, 0x49,
|
|
|
|
|
0x92, 0x39, 0x72, 0xe4, 0xd5, 0xb7, 0x73, 0xe6,
|
|
|
|
|
0xd1, 0xbf, 0x63, 0xc6, 0x91, 0x3f, 0x7e, 0xfc,
|
|
|
|
|
0xe5, 0xd7, 0xb3, 0x7b, 0xf6, 0xf1, 0xff, 0xe3,
|
|
|
|
|
0xdb, 0xab, 0x4b, 0x96, 0x31, 0x62, 0xc4, 0x95,
|
|
|
|
|
0x37, 0x6e, 0xdc, 0xa5, 0x57, 0xae, 0x41, 0x82,
|
|
|
|
|
0x19, 0x32, 0x64, 0xc8, 0x8d, 0x07, 0x0e, 0x1c,
|
|
|
|
|
0x38, 0x70, 0xe0, 0xdd, 0xa7, 0x53, 0xa6, 0x51,
|
|
|
|
|
0xa2, 0x59, 0xb2, 0x79, 0xf2, 0xf9, 0xef, 0xc3,
|
|
|
|
|
0x9b, 0x2b, 0x56, 0xac, 0x45, 0x8a, 0x09, 0x12,
|
|
|
|
|
0x24, 0x48, 0x90, 0x3d, 0x7a, 0xf4, 0xf5, 0xf7,
|
|
|
|
|
0xf3, 0xfb, 0xeb, 0xcb, 0x8b, 0x0b, 0x16, 0x2c,
|
|
|
|
|
0x58, 0xb0, 0x7d, 0xfa, 0xe9, 0xcf, 0x83, 0x1b,
|
|
|
|
|
0x36, 0x6c, 0xd8, 0xad, 0x47, 0x8e, 0x01, 0x02
|
|
|
|
|
};
|
