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Add worker source
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Jon Beniston
parent
ff26ece347
commit
3287346a7e
159
plugins/channelrx/demoddatv/ldpctool/ldpcworker.cpp
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159
plugins/channelrx/demoddatv/ldpctool/ldpcworker.cpp
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/*
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LDPC testbench
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Copyright 2018 Ahmet Inan <xdsopl@gmail.com>
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Transformed into external decoder for third-party applications
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Copyright 2019 <pabr@pabr.org>
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Transformed again in to a Qt worker.
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*/
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#include <QDebug>
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#include <stdlib.h>
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#ifdef _MSC_VER
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#include <malloc.h>
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#endif
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#include <iostream>
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#include <iomanip>
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#include <random>
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#include <cmath>
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#include <cassert>
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#include <chrono>
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#include <cstring>
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#include <algorithm>
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#include <functional>
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#include "ldpcworker.h"
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LDPCWorker::LDPCWorker(int modcod, int maxTrials, int batchSize, bool shortFrames) :
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m_maxTrials(maxTrials),
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m_aligned_buffer(nullptr),
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m_ldpc(nullptr),
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m_code(nullptr),
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m_simd(nullptr)
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{
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// DVB-S2 MODCOD definitions
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static const char *mc_tabnames[2][32] = { // [shortframes][modcod]
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{// Normal frames
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0, "B1", "B2", "B3", "B4", "B5", "B6", "B7",
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"B8", "B9", "B10", "B11", "B5", "B6", "B7", "B9",
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"B10", "B11", "B6", "B7", "B8", "B9", "B10", "B11",
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"B7", "B8", "B8", "B10", "B11", 0, 0, 0},
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{// Short frames
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0, "C1", "C2", "C3", "C4", "C5", "C6", "C7",
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"C8", "C9", "C10", 0, "C5", "C6", "C7", "C9",
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"C10", 0, "C6", "C7", "C8", "C9", "C10", 0,
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"C7", "C8", "C8", "C10", 0, 0, 0, 0}};
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const char *tabname = mc_tabnames[shortFrames][modcod];
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if (!tabname)
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{
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qCritical() << "LDPCWorker::LDPCWorker: unsupported modcod";
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return;
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}
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m_ldpc = ldpctool::create_ldpc((char *)"S2", tabname[0], atoi(tabname + 1));
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if (!m_ldpc)
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{
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qCritical() << "LDPCWorker::LDPCWorker: no such table!";
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return;
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}
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m_codeLen = m_ldpc->code_len();
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m_dataLen = m_ldpc->data_len();
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m_decode.init(m_ldpc);
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BLOCKS = batchSize;
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m_code = new ldpctool::code_type[BLOCKS * m_codeLen];
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m_aligned_buffer = ldpctool::LDPCUtil::aligned_malloc(sizeof(ldpctool::simd_type), sizeof(ldpctool::simd_type) * m_codeLen);
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m_simd = reinterpret_cast<ldpctool::simd_type *>(m_aligned_buffer);
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// Expect LLR values in int8_t format.
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if (sizeof(ldpctool::code_type) != 1) {
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qCritical() << "LDPCWorker::LDPCWorker: Unsupported code_type";
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}
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}
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LDPCWorker::~LDPCWorker()
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{
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m_condOut.wakeAll();
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delete m_ldpc;
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ldpctool::LDPCUtil::aligned_free(m_aligned_buffer);
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delete[] m_code;
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}
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void LDPCWorker::process(QByteArray data)
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{
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int trials_count = 0;
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int max_count = 0;
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int num_decodes = 0;
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int iosize = m_codeLen * sizeof(*m_code);
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m_mutexIn.lock();
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m_dataIn.append(data);
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if (m_dataIn.size() >= BLOCKS)
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{
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for (int j = 0; j < BLOCKS; j++)
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{
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QByteArray inputData = m_dataIn.takeAt(0);
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memcpy(m_code + j * m_codeLen, inputData.data(), inputData.size());
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}
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m_mutexIn.unlock();
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for (int j = 0; j < BLOCKS; j += ldpctool::SIMD_WIDTH)
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{
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int blocks = j + ldpctool::SIMD_WIDTH > BLOCKS ? BLOCKS - j : ldpctool::SIMD_WIDTH;
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for (int n = 0; n < blocks; ++n)
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for (int i = 0; i < m_codeLen; ++i)
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reinterpret_cast<ldpctool::code_type *>(m_simd + i)[n] = m_code[(j + n) * m_codeLen + i];
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int count = m_decode(m_simd, m_simd + m_dataLen, m_maxTrials, blocks);
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num_decodes++;
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if (count < 0)
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{
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trials_count += m_maxTrials;
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max_count++;
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}
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else
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{
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trials_count += m_maxTrials - count;
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}
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if (num_decodes == 20)
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{
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qDebug() << "ldpc_tool: trials: " << ((trials_count*100)/(num_decodes*m_maxTrials)) << "% max: "
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<< ((max_count*100)/num_decodes) << "% at converging to a code word (max trials: " << m_maxTrials << ")";
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trials_count = 0;
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max_count = 0;
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num_decodes = 0;
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}
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for (int n = 0; n < blocks; ++n)
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for (int i = 0; i < m_codeLen; ++i)
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m_code[(j + n) * m_codeLen + i] = reinterpret_cast<ldpctool::code_type *>(m_simd + i)[n];
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}
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for (int i = 0; i < BLOCKS * m_codeLen; ++i)
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assert(!std::isnan(m_code[i]));
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m_mutexOut.lock();
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for (int j = 0; j < BLOCKS; j++)
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{
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QByteArray outputData((const char *)m_code + j * m_codeLen, iosize);
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m_dataOut.append(outputData);
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}
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m_condOut.wakeAll();
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m_mutexOut.unlock();
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}
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else
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{
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m_mutexIn.unlock();
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}
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}
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94
plugins/channelrx/demoddatv/ldpctool/ldpcworker.h
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94
plugins/channelrx/demoddatv/ldpctool/ldpcworker.h
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///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2022 Jon Beniston, M7RCE //
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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 <QObject>
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#include <QByteArray>
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#include <QMutex>
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#include <QWaitCondition>
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#include "testbench.h"
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#include "algorithms.h"
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#include "ldpc.h"
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#include "layered_decoder.h"
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class LDPCWorker : public QObject {
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Q_OBJECT
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public:
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LDPCWorker(int modcod, int maxTrials, int batchSize, bool shortFrames);
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~LDPCWorker();
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// Are we busy
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bool busy()
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{
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QMutexLocker locker(&m_mutexIn);
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return m_dataIn.size() >= BLOCKS;
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}
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// Is processed data available?
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bool dataAvailable()
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{
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QMutexLocker locker(&m_mutexOut);
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return !m_dataOut.isEmpty();
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}
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// Get processed data
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QByteArray data()
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{
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m_mutexOut.lock();
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if (m_dataOut.isEmpty()) {
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m_condOut.wait(&m_mutexOut);
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}
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QByteArray data = m_dataOut.takeAt(0);
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m_mutexOut.unlock();
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return data;
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}
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public slots:
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void process(QByteArray data);
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signals:
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void finished();
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private:
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QMutex m_mutexIn;
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QMutex m_mutexOut;
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QWaitCondition m_condOut;
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QList<QByteArray> m_dataIn;
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QList<QByteArray> m_dataOut;
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int m_maxTrials;
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int BLOCKS;
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int m_codeLen;
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int m_dataLen;
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void *m_aligned_buffer;
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ldpctool::LDPCInterface *m_ldpc;
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ldpctool::code_type *m_code;
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ldpctool::simd_type *m_simd;
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typedef ldpctool::NormalUpdate<ldpctool::simd_type> update_type;
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//typedef SelfCorrectedUpdate<simd_type> update_type;
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//typedef MinSumAlgorithm<simd_type, update_type> algorithm_type;
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//typedef OffsetMinSumAlgorithm<simd_type, update_type, FACTOR> algorithm_type;
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typedef ldpctool::MinSumCAlgorithm<ldpctool::simd_type, update_type, ldpctool::FACTOR> algorithm_type;
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//typedef LogDomainSPA<simd_type, update_type> algorithm_type;
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//typedef LambdaMinAlgorithm<simd_type, update_type, 3> algorithm_type;
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//typedef SumProductAlgorithm<simd_type, update_type> algorithm_type;
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ldpctool::LDPCDecoder<ldpctool::simd_type, algorithm_type> m_decode;
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};
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