mirror of
https://github.com/f4exb/sdrangel.git
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220 lines
8.7 KiB
C++
220 lines
8.7 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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// (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 "udpsinkfec.h"
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#include <QThread>
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#include <QDebug>
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#include <boost/crc.hpp>
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#include <boost/cstdint.hpp>
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#include "util/timeutil.h"
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#include "remoteoutputsender.h"
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UDPSinkFEC::UDPSinkFEC() :
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m_sampleRate(48000),
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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_dataBlock(nullptr),
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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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m_remoteOutputSender(nullptr),
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m_senderThread(nullptr),
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m_remoteAddress("127.0.0.1"),
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m_remotePort(9090)
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{
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memset((char *) &m_superBlock, 0, sizeof(RemoteSuperBlock));
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m_currentMetaFEC.init();
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m_senderThread = new QThread(this);
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m_remoteOutputSender = new RemoteOutputSender();
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m_remoteOutputSender->moveToThread(m_senderThread);
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}
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UDPSinkFEC::~UDPSinkFEC()
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{
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delete m_remoteOutputSender;
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delete m_senderThread;
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}
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void UDPSinkFEC::startSender()
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{
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qDebug("UDPSinkFEC::startSender");
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m_remoteOutputSender->setDestination(m_remoteAddress, m_remotePort);
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m_senderThread->start();
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}
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void UDPSinkFEC::stopSender()
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{
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qDebug("UDPSinkFEC::stopSender");
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m_senderThread->exit();
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m_senderThread->wait();
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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 = RemoteNbBytesPerBlock / sizeof(Sample);
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double delay = m_sampleRate == 0 ? 1.0 : (127*samplesPerBlock*txDelayRatio) / m_sampleRate;
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delay /= 128 + m_nbBlocksFEC;
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m_txDelay = delay * 1e6;
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qDebug() << "UDPSinkFEC::setTxDelay:"
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<< "txDelay:" << txDelayRatio
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<< "m_txDelay:" << m_txDelay << " us"
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<< "m_sampleRate:" << m_sampleRate;
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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_remoteAddress = address;
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m_remotePort = port;
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m_remoteOutputSender->setDestination(m_remoteAddress, m_remotePort);
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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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const SampleVector::iterator end = begin + sampleChunkSize;
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SampleVector::const_iterator it = begin;
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while (it != end)
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{
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int inSamplesIndex = it - begin;
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int inRemainingSamples = end - it;
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if (m_txBlockIndex == 0)
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{
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RemoteMetaDataFEC metaData;
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uint64_t nowus = TimeUtil::nowus();
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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 = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
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metaData.m_sampleBits = SDR_RX_SAMP_SZ;
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metaData.m_nbOriginalBlocks = RemoteNbOrginalBlocks;
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metaData.m_nbFECBlocks = m_nbBlocksFEC;
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metaData.m_tv_sec = nowus / 1000000UL; // tv.tv_sec;
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metaData.m_tv_usec = nowus % 1000000UL; // tv.tv_usec;
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if (!m_dataBlock) { // on the very first cycle there is no data block allocated
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m_dataBlock = m_remoteOutputSender->getDataBlock(); // ask a new block to sender
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}
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boost::crc_32_type crc32;
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crc32.process_bytes(&metaData, sizeof(RemoteMetaDataFEC)-4);
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metaData.m_crc32 = crc32.checksum();
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RemoteSuperBlock& superBlock = m_dataBlock->m_superBlocks[0]; // first block
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superBlock.init();
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superBlock.m_header.m_frameIndex = m_frameCount;
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superBlock.m_header.m_blockIndex = m_txBlockIndex;
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superBlock.m_header.m_sampleBytes = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
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superBlock.m_header.m_sampleBits = SDR_RX_SAMP_SZ;
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RemoteMetaDataFEC *destMeta = (RemoteMetaDataFEC *) &superBlock.m_protectedBlock;
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*destMeta = metaData;
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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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m_currentMetaFEC = metaData;
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}
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m_txBlockIndex = 1; // next Tx block with data
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} // block zero
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// handle different sample sizes...
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int samplesPerBlock = RemoteNbBytesPerBlock / (SDR_RX_SAMP_SZ <= 16 ? 4 : 8); // two I or Q samples
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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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memcpy((void *) &m_superBlock.m_protectedBlock.buf[m_sampleIndex*sizeof(Sample)],
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(const void *) &(*(begin+inSamplesIndex)),
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inRemainingSamples * sizeof(Sample));
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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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memcpy((void *) &m_superBlock.m_protectedBlock.buf[m_sampleIndex*sizeof(Sample)],
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(const void *) &(*(begin+inSamplesIndex)),
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(samplesPerBlock - m_sampleIndex) * sizeof(Sample));
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it += samplesPerBlock - m_sampleIndex;
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m_sampleIndex = 0;
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m_superBlock.m_header.m_frameIndex = m_frameCount;
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m_superBlock.m_header.m_blockIndex = m_txBlockIndex;
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m_superBlock.m_header.m_sampleBytes = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
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m_superBlock.m_header.m_sampleBits = SDR_RX_SAMP_SZ;
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m_dataBlock->m_superBlocks[m_txBlockIndex] = m_superBlock;
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if (m_txBlockIndex == RemoteNbOrginalBlocks - 1) // frame complete
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{
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m_dataBlock->m_txControlBlock.m_frameIndex = m_frameCount;
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m_dataBlock->m_txControlBlock.m_processed = false;
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m_dataBlock->m_txControlBlock.m_complete = true;
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m_dataBlock->m_txControlBlock.m_nbBlocksFEC = m_nbBlocksFEC;
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m_dataBlock->m_txControlBlock.m_txDelay = m_txDelay;
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m_dataBlock->m_txControlBlock.m_dataAddress = m_remoteAddress;
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m_dataBlock->m_txControlBlock.m_dataPort = m_remotePort;
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m_dataBlock = m_remoteOutputSender->getDataBlock(); // ask a new block to sender
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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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