mirror of
https://github.com/f4exb/sdrangel.git
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404 lines
16 KiB
C++
404 lines
16 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017 Edouard Griffiths, F4EXB //
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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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// //
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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 <QDebug>
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#include <sys/time.h>
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#include <unistd.h>
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#include <boost/crc.hpp>
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#include <boost/cstdint.hpp>
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#include "udpsinkfec.h"
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MESSAGE_CLASS_DEFINITION(UDPSinkFECWorker::MsgUDPFECEncodeAndSend, Message)
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MESSAGE_CLASS_DEFINITION(UDPSinkFECWorker::MsgConfigureRemoteAddress, Message)
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UDPSinkFEC::UDPSinkFEC() :
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m_sampleRate(48000),
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m_sampleBytes(SDR_TX_SAMP_SZ <= 16 ? 2 : 4),
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m_sampleBits(SDR_TX_SAMP_SZ),
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m_nbSamples(0),
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m_nbBlocksFEC(0),
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m_txDelayRatio(0.0),
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m_txDelay(0),
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m_txBlockIndex(0),
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m_txBlocksIndex(0),
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m_frameCount(0),
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m_sampleIndex(0)
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{
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memset((char *) m_txBlocks, 0, 4*256*sizeof(SuperBlock));
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memset((char *) &m_superBlock, 0, sizeof(SuperBlock));
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m_currentMetaFEC.init();
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m_bufMeta = new uint8_t[m_udpSize];
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m_buf = new uint8_t[m_udpSize];
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m_udpThread = new QThread();
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m_udpWorker = new UDPSinkFECWorker();
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m_udpWorker->moveToThread(m_udpThread);
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connect(m_udpThread, SIGNAL(started()), m_udpWorker, SLOT(process()));
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connect(m_udpWorker, SIGNAL(finished()), m_udpThread, SLOT(quit()));
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m_udpThread->start();
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}
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UDPSinkFEC::~UDPSinkFEC()
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{
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m_udpWorker->stop();
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m_udpThread->wait();
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delete[] m_buf;
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delete[] m_bufMeta;
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delete m_udpWorker;
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delete m_udpThread;
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}
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void UDPSinkFEC::setTxDelay(float txDelayRatio)
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{
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// delay is calculated from the fraction of the nominal UDP block process time
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// frame size: 127 * (126 or 63 samples depending on I or Q sample bytes of 2 or 4 bytes respectively)
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// divided by sample rate gives the frame process time
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// divided by the number of actual blocks including FEC blocks gives the block (i.e. UDP block) process time
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m_txDelayRatio = txDelayRatio;
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int samplesPerBlock = bytesPerBlock / (m_sampleBytes*2);
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double delay = ((127*samplesPerBlock*txDelayRatio) / m_sampleRate)/(128 + m_nbBlocksFEC);
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m_txDelay = delay * 1e6;
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qDebug() << "UDPSinkFEC::setTxDelay: txDelay: " << txDelayRatio << " m_txDelay: " << m_txDelay << " us";
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}
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void UDPSinkFEC::setNbBlocksFEC(uint32_t nbBlocksFEC)
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{
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qDebug() << "UDPSinkFEC::setNbBlocksFEC: nbBlocksFEC: " << nbBlocksFEC;
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m_nbBlocksFEC = nbBlocksFEC;
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setTxDelay(m_txDelayRatio);
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}
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void UDPSinkFEC::setSampleRate(uint32_t sampleRate)
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{
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qDebug() << "UDPSinkFEC::setSampleRate: sampleRate: " << sampleRate;
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m_sampleRate = sampleRate;
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setTxDelay(m_txDelayRatio);
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}
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void UDPSinkFEC::setRemoteAddress(const QString& address, uint16_t port)
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{
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qDebug() << "UDPSinkFEC::setRemoteAddress: address: " << address << " port: " << port;
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m_udpWorker->setRemoteAddress(address, port);
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}
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void UDPSinkFEC::write(const SampleVector::iterator& begin, uint32_t sampleChunkSize)
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{
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//qDebug("UDPSinkFEC::write(: %u samples", sampleChunkSize);
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const SampleVector::iterator end = begin + sampleChunkSize;
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SampleVector::iterator it = begin;
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while (it != end)
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{
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int inRemainingSamples = end - it;
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if (m_txBlockIndex == 0) // Tx block index 0 is a block with only meta data
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{
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struct timeval tv;
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MetaDataFEC metaData;
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gettimeofday(&tv, 0);
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metaData.m_centerFrequency = 0; // frequency not set by stream
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metaData.m_sampleRate = m_sampleRate;
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metaData.m_sampleBytes = m_sampleBytes & 0xF;
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metaData.m_sampleBits = m_sampleBits;
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metaData.m_nbOriginalBlocks = m_nbOriginalBlocks;
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metaData.m_nbFECBlocks = m_nbBlocksFEC;
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metaData.m_tv_sec = tv.tv_sec;
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metaData.m_tv_usec = tv.tv_usec;
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boost::crc_32_type crc32;
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crc32.process_bytes(&metaData, 20);
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metaData.m_crc32 = crc32.checksum();
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memset((char *) &m_superBlock, 0, sizeof(m_superBlock));
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m_superBlock.header.frameIndex = m_frameCount;
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m_superBlock.header.blockIndex = m_txBlockIndex;
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memcpy((char *) &m_superBlock.protectedBlock, (const char *) &metaData, sizeof(MetaDataFEC));
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if (!(metaData == m_currentMetaFEC))
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{
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qDebug() << "UDPSinkFEC::write: meta: "
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<< "|" << metaData.m_centerFrequency
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<< ":" << metaData.m_sampleRate
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<< ":" << (int) (metaData.m_sampleBytes & 0xF)
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<< ":" << (int) metaData.m_sampleBits
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<< "|" << (int) metaData.m_nbOriginalBlocks
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<< ":" << (int) metaData.m_nbFECBlocks
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<< "|" << metaData.m_tv_sec
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<< ":" << metaData.m_tv_usec
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<< "|";
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m_currentMetaFEC = metaData;
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}
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m_txBlocks[m_txBlocksIndex][0] = m_superBlock;
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m_txBlockIndex = 1; // next Tx block with data
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}
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int samplesPerBlock = bytesPerBlock / (m_sampleBytes*2);
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if (m_sampleIndex + inRemainingSamples < samplesPerBlock) // there is still room in the current super block
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{
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if (sizeof(Sample) == m_sampleBytes*2) // can do direct copy if sample sizes are equal
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{
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memcpy((char *) &m_superBlock.protectedBlock.m_buf[m_sampleIndex*m_sampleBytes*2],
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(const char *) &(*it),
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inRemainingSamples * sizeof(Sample));
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}
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else if ((sizeof(Sample) == 8) && (m_sampleBytes == 2)) // modulators produce 16 bit samples
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{
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for (int is = 0; is < inRemainingSamples; is++)
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{
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int16_t *rp = (int16_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2]);
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int16_t *ip = (int16_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2+2]);
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*rp = (it+is)->m_real & 0xFFFF;
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*ip = (it+is)->m_imag & 0xFFFF;
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}
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}
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else if ((sizeof(Sample) == 4) && (m_sampleBytes == 4)) // use 16 bit samples for Tx
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{
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for (int is = 0; is < inRemainingSamples; is++)
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{
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int32_t *rp = (int32_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2]);
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int32_t *ip = (int32_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2+4]);
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*rp = (it+is)->m_real;
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*ip = (it+is)->m_imag;
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}
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}
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m_sampleIndex += inRemainingSamples;
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it = end; // all input samples are consumed
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}
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else // complete super block and initiate the next if not end of frame
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{
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if (sizeof(Sample) == m_sampleBytes*2) // can do direct copy if sample sizes are equal
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{
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memcpy((char *) &m_superBlock.protectedBlock.m_buf[m_sampleIndex*m_sampleBytes*2],
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(const char *) &(*it),
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(samplesPerBlock - m_sampleIndex) * sizeof(Sample));
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}
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else if ((sizeof(Sample) == 8) && (m_sampleBytes == 2)) // modulators produce 16 bit samples
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{
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for (int is = 0; is < samplesPerBlock - m_sampleIndex; is++)
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{
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int16_t *rp = (int16_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2]);
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int16_t *ip = (int16_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2+2]);
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*rp = (it+is)->m_real & 0xFFFF;
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*ip = (it+is)->m_imag & 0xFFFF;
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}
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}
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else if ((sizeof(Sample) == 4) && (m_sampleBytes == 4)) // use 16 bit samples for Tx
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{
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for (int is = 0; is < samplesPerBlock - m_sampleIndex; is++)
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{
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int32_t *rp = (int32_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2]);
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int32_t *ip = (int32_t*) &(m_superBlock.protectedBlock.m_buf[(m_sampleIndex+is)*m_sampleBytes*2+4]);
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*rp = (it+is)->m_real;
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*ip = (it+is)->m_imag;
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}
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}
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it += samplesPerBlock - m_sampleIndex;
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m_sampleIndex = 0;
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m_superBlock.header.frameIndex = m_frameCount;
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m_superBlock.header.blockIndex = m_txBlockIndex;
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m_txBlocks[m_txBlocksIndex][m_txBlockIndex] = m_superBlock;
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if (m_txBlockIndex == m_nbOriginalBlocks - 1) // frame complete
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{
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int nbBlocksFEC = m_nbBlocksFEC;
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int txDelay = m_txDelay;
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//qDebug("UDPSinkFEC::write: push frame to worker: %u", m_frameCount);
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m_udpWorker->pushTxFrame(m_txBlocks[m_txBlocksIndex], nbBlocksFEC, txDelay, m_frameCount);
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//m_txThread = new std::thread(transmitUDP, this, m_txBlocks[m_txBlocksIndex], m_frameCount, nbBlocksFEC, txDelay, m_cm256Valid);
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//transmitUDP(this, m_txBlocks[m_txBlocksIndex], m_frameCount, m_nbBlocksFEC, m_txDelay, m_cm256Valid);
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m_txBlocksIndex = (m_txBlocksIndex + 1) % 4;
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m_txBlockIndex = 0;
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m_frameCount++;
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}
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else
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{
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m_txBlockIndex++;
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}
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}
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}
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}
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UDPSinkFECWorker::UDPSinkFECWorker() :
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m_running(false),
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m_remotePort(9090)
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{
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m_cm256Valid = m_cm256.isInitialized();
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connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()), Qt::DirectConnection);
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}
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UDPSinkFECWorker::~UDPSinkFECWorker()
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{
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disconnect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
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m_inputMessageQueue.clear();
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}
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void UDPSinkFECWorker::pushTxFrame(UDPSinkFEC::SuperBlock *txBlocks,
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uint32_t nbBlocksFEC,
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uint32_t txDelay,
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uint16_t frameIndex)
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{
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//qDebug("UDPSinkFECWorker::pushTxFrame. %d", m_inputMessageQueue.size());
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m_inputMessageQueue.push(MsgUDPFECEncodeAndSend::create(txBlocks, nbBlocksFEC, txDelay, frameIndex));
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}
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void UDPSinkFECWorker::setRemoteAddress(const QString& address, uint16_t port)
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{
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m_inputMessageQueue.push(MsgConfigureRemoteAddress::create(address, port));
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}
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void UDPSinkFECWorker::process()
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{
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m_running = true;
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qDebug("UDPSinkFECWorker::process: started");
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while (m_running)
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{
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usleep(250000);
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}
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qDebug("UDPSinkFECWorker::process: stopped");
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emit finished();
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}
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void UDPSinkFECWorker::stop()
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{
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m_running = false;
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}
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void UDPSinkFECWorker::handleInputMessages()
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{
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Message* message;
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while ((message = m_inputMessageQueue.pop()) != 0)
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{
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if (MsgUDPFECEncodeAndSend::match(*message))
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{
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MsgUDPFECEncodeAndSend *sendMsg = (MsgUDPFECEncodeAndSend *) message;
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encodeAndTransmit(sendMsg->getTxBlocks(), sendMsg->getFrameIndex(), sendMsg->getNbBlocsFEC(), sendMsg->getTxDelay());
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}
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else if (MsgConfigureRemoteAddress::match(*message))
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{
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qDebug("UDPSinkFECWorker::handleInputMessages: %s", message->getIdentifier());
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MsgConfigureRemoteAddress *addressMsg = (MsgConfigureRemoteAddress *) message;
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m_remoteAddress = addressMsg->getAddress();
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m_remotePort = addressMsg->getPort();
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}
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delete message;
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}
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}
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void UDPSinkFECWorker::encodeAndTransmit(UDPSinkFEC::SuperBlock *txBlockx, uint16_t frameIndex, uint32_t nbBlocksFEC, uint32_t txDelay)
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{
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CM256::cm256_encoder_params cm256Params; //!< Main interface with CM256 encoder
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CM256::cm256_block descriptorBlocks[256]; //!< Pointers to data for CM256 encoder
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UDPSinkFEC::ProtectedBlock fecBlocks[256]; //!< FEC data
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if ((nbBlocksFEC == 0) || !m_cm256Valid)
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{
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// qDebug("UDPSinkFECWorker::encodeAndTransmit: transmit frame without FEC to %s:%d", m_remoteAddress.toStdString().c_str(), m_remotePort);
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for (unsigned int i = 0; i < UDPSinkFEC::m_nbOriginalBlocks; i++)
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{
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m_socket.SendDataGram((const void *) &txBlockx[i], (int) UDPSinkFEC::m_udpSize, m_remoteAddress.toStdString(), (uint32_t) m_remotePort);
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//m_udpSocket->writeDatagram((const char *) &txBlockx[i], (int) UDPSinkFEC::m_udpSize, m_remoteAddress, m_remotePort);
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usleep(txDelay);
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}
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}
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else
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{
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cm256Params.BlockBytes = sizeof(UDPSinkFEC::ProtectedBlock);
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cm256Params.OriginalCount = UDPSinkFEC::m_nbOriginalBlocks;
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cm256Params.RecoveryCount = nbBlocksFEC;
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// Fill pointers to data
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for (int i = 0; i < cm256Params.OriginalCount + cm256Params.RecoveryCount; ++i)
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{
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if (i >= cm256Params.OriginalCount) {
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memset((char *) &txBlockx[i].protectedBlock, 0, sizeof(UDPSinkFEC::ProtectedBlock));
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}
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txBlockx[i].header.frameIndex = frameIndex;
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txBlockx[i].header.blockIndex = i;
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descriptorBlocks[i].Block = (void *) &(txBlockx[i].protectedBlock);
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descriptorBlocks[i].Index = txBlockx[i].header.blockIndex;
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}
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// Encode FEC blocks
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if (m_cm256.cm256_encode(cm256Params, descriptorBlocks, fecBlocks))
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{
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qDebug("UDPSinkFECWorker::encodeAndTransmit: CM256 encode failed. No transmission.");
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return;
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}
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// Merge FEC with data to transmit
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for (int i = 0; i < cm256Params.RecoveryCount; i++)
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{
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txBlockx[i + cm256Params.OriginalCount].protectedBlock = fecBlocks[i];
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}
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// Transmit all blocks
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// qDebug("UDPSinkFECWorker::encodeAndTransmit: transmit frame with FEC to %s:%d", m_remoteAddress.toStdString().c_str(), m_remotePort);
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for (int i = 0; i < cm256Params.OriginalCount + cm256Params.RecoveryCount; i++)
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{
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#ifdef SDRDAEMON_PUNCTURE
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if (i == SDRDAEMON_PUNCTURE) {
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continue;
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}
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#endif
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// std::cerr << "UDPSinkFEC::transmitUDP:"
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// << " i: " << i
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// << " frameIndex: " << (int) m_txBlocks[i].header.frameIndex
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// << " blockIndex: " << (int) m_txBlocks[i].header.blockIndex
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// << " i.q:";
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//
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// for (int j = 0; j < 10; j++)
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// {
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// std::cerr << " " << (int) m_txBlocks[i].protectedBlock.m_samples[j].m_real
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// << "." << (int) m_txBlocks[i].protectedBlock.m_samples[j].m_imag;
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// }
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//
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// std::cerr << std::endl;
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m_socket.SendDataGram((const void *) &txBlockx[i], (int) UDPSinkFEC::m_udpSize, m_remoteAddress.toStdString(), (uint32_t) m_remotePort);
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//m_udpSocket->writeDatagram((const char *) &txBlockx[i], (int) UDPSinkFEC::m_udpSize, m_remoteAddress, m_remotePort);
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usleep(txDelay);
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}
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}
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}
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