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sdrangel/plugins/samplesink/remoteoutput/remoteoutputsender.cpp

161 lines
6.5 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// Copyright (C) 2015-2019, 2021 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
// Copyright (C) 2015 John Greb <hexameron@spam.no> //
// Copyright (C) 2019 Davide Gerhard <rainbow@irh.it> //
// //
// Remote sink channel (Rx) UDP sender thread //
// //
// SDRangel can work as a detached SDR front end. With this plugin it can //
// sends the I/Q samples stream to another SDRangel instance via UDP. //
// It is controlled via a Web REST API. //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include <boost/crc.hpp>
#include <boost/cstdint.hpp>
#include <QUdpSocket>
#include "cm256cc/cm256.h"
#include "channel/remotedatablock.h"
#include "remoteoutputsender.h"
RemoteOutputSender::RemoteOutputSender() :
m_fifo(20, this),
m_udpSocket(nullptr),
m_remotePort(9090)
{
qDebug("RemoteOutputSender::RemoteOutputSender");
m_cm256p = m_cm256.isInitialized() ? &m_cm256 : nullptr;
m_udpSocket = new QUdpSocket(this);
QObject::connect(
&m_fifo,
&RemoteOutputFifo::dataBlockServed,
this,
&RemoteOutputSender::handleData,
Qt::QueuedConnection
);
}
RemoteOutputSender::~RemoteOutputSender()
{
qDebug("RemoteOutputSender::~RemoteOutputSender");
delete m_udpSocket;
}
void RemoteOutputSender::setDestination(const QString& address, uint16_t port)
{
m_remoteAddress = address;
m_remotePort = port;
m_remoteHostAddress.setAddress(address);
}
RemoteDataFrame *RemoteOutputSender::getDataFrame()
{
return m_fifo.getDataFrame();
}
void RemoteOutputSender::handleData()
{
RemoteDataFrame *dataFrame;
unsigned int remainder = m_fifo.getRemainder();
while (remainder != 0)
{
remainder = m_fifo.readDataFrame(&dataFrame);
if (dataFrame) {
sendDataFrame(dataFrame);
}
}
}
void RemoteOutputSender::sendDataFrame(RemoteDataFrame *dataFrame)
{
CM256::cm256_encoder_params cm256Params; //!< Main interface with CM256 encoder
CM256::cm256_block descriptorBlocks[256]; //!< Pointers to data for CM256 encoder
RemoteProtectedBlock fecBlocks[256]; //!< FEC data
uint16_t frameIndex = dataFrame->m_txControlBlock.m_frameIndex;
int nbBlocksFEC = dataFrame->m_txControlBlock.m_nbBlocksFEC;
m_remoteHostAddress.setAddress(dataFrame->m_txControlBlock.m_dataAddress);
uint16_t dataPort = dataFrame->m_txControlBlock.m_dataPort;
RemoteSuperBlock *txBlockx = dataFrame->m_superBlocks;
if ((nbBlocksFEC == 0) || !m_cm256p) // Do not FEC encode
{
if (m_udpSocket)
{
for (int i = 0; i < RemoteNbOrginalBlocks; i++) { // send blocks via UDP
m_udpSocket->writeDatagram((const char*)&txBlockx[i], (qint64 ) RemoteUdpSize, m_remoteHostAddress, dataPort);
}
}
}
else
{
cm256Params.BlockBytes = sizeof(RemoteProtectedBlock);
cm256Params.OriginalCount = RemoteNbOrginalBlocks;
cm256Params.RecoveryCount = nbBlocksFEC;
// Fill pointers to data
for (int i = 0; i < cm256Params.OriginalCount + cm256Params.RecoveryCount; ++i)
{
if (i >= cm256Params.OriginalCount) {
memset((void *) &txBlockx[i].m_protectedBlock, 0, sizeof(RemoteProtectedBlock));
}
txBlockx[i].m_header.m_frameIndex = frameIndex;
txBlockx[i].m_header.m_blockIndex = i;
txBlockx[i].m_header.m_sampleBytes = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
txBlockx[i].m_header.m_sampleBits = SDR_RX_SAMP_SZ;
descriptorBlocks[i].Block = (void *) &(txBlockx[i].m_protectedBlock);
descriptorBlocks[i].Index = txBlockx[i].m_header.m_blockIndex;
}
// Encode FEC blocks
if (m_cm256p->cm256_encode(cm256Params, descriptorBlocks, fecBlocks))
{
qWarning("RemoteSinkSender::handleDataBlock: CM256 encode failed. Transmit without FEC.");
cm256Params.RecoveryCount = 0;
RemoteSuperBlock& superBlock = dataFrame->m_superBlocks[0]; // first block
RemoteMetaDataFEC *destMeta = (RemoteMetaDataFEC *) &superBlock.m_protectedBlock;
destMeta->m_nbFECBlocks = 0;
boost::crc_32_type crc32;
crc32.process_bytes(destMeta, sizeof(RemoteMetaDataFEC)-4);
destMeta->m_crc32 = crc32.checksum();
}
// Merge FEC with data to transmit
for (int i = 0; i < cm256Params.RecoveryCount; i++) {
txBlockx[i + cm256Params.OriginalCount].m_protectedBlock = fecBlocks[i];
}
// Transmit all blocks
if (m_udpSocket)
{
for (int i = 0; i < cm256Params.OriginalCount + cm256Params.RecoveryCount; i++) { // send blocks via UDP
m_udpSocket->writeDatagram((const char*)&txBlockx[i], (qint64 ) RemoteUdpSize, m_remoteHostAddress, dataPort);
}
}
}
dataFrame->m_txControlBlock.m_processed = true;
}