mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-23 10:05:46 -05:00
152 lines
5.8 KiB
C++
152 lines
5.8 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018-2019 Edouard Griffiths, F4EXB. //
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// //
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// Remote sink channel (Rx) UDP sender thread //
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// //
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// SDRangel can work as a detached SDR front end. With this plugin it can //
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// sends the I/Q samples stream to another SDRangel instance via UDP. //
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// It is controlled via a Web REST API. //
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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 <thread>
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#include <chrono>
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#include <QUdpSocket>
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#include "cm256cc/cm256.h"
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#include "channel/remotedatablock.h"
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#include "remotesinksender.h"
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RemoteSinkSender::RemoteSinkSender() :
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m_fifo(20, this),
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m_address(QHostAddress::LocalHost),
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m_socket(nullptr)
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{
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qDebug("RemoteSinkSender::RemoteSinkSender");
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m_cm256p = m_cm256.isInitialized() ? &m_cm256 : nullptr;
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m_socket = new QUdpSocket(this);
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QObject::connect(
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&m_fifo,
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&RemoteSinkFifo::dataBlockServed,
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this,
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&RemoteSinkSender::handleData,
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Qt::QueuedConnection
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);
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}
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RemoteSinkSender::~RemoteSinkSender()
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{
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qDebug("RemoteSinkSender::~RemoteSinkSender");
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delete m_socket;
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}
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RemoteDataBlock *RemoteSinkSender::getDataBlock()
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{
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return m_fifo.getDataBlock();
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}
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void RemoteSinkSender::handleData()
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{
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RemoteDataBlock *dataBlock;
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unsigned int remainder = m_fifo.getRemainder();
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while (remainder != 0)
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{
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remainder = m_fifo.readDataBlock(&dataBlock);
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if (dataBlock) {
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sendDataBlock(dataBlock);
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}
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}
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}
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void RemoteSinkSender::sendDataBlock(RemoteDataBlock *dataBlock)
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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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RemoteProtectedBlock fecBlocks[256]; //!< FEC data
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uint16_t frameIndex = dataBlock->m_txControlBlock.m_frameIndex;
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int nbBlocksFEC = dataBlock->m_txControlBlock.m_nbBlocksFEC;
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int txDelay = dataBlock->m_txControlBlock.m_txDelay;
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m_address.setAddress(dataBlock->m_txControlBlock.m_dataAddress);
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uint16_t dataPort = dataBlock->m_txControlBlock.m_dataPort;
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RemoteSuperBlock *txBlockx = dataBlock->m_superBlocks;
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if ((nbBlocksFEC == 0) || !m_cm256p) // Do not FEC encode
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{
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if (m_socket)
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{
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for (int i = 0; i < RemoteNbOrginalBlocks; i++)
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{
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// send block via UDP
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m_socket->writeDatagram((const char*)&txBlockx[i], (qint64 ) RemoteUdpSize, m_address, dataPort);
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std::this_thread::sleep_for(std::chrono::microseconds(txDelay));
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}
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}
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}
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else
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{
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cm256Params.BlockBytes = sizeof(RemoteProtectedBlock);
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cm256Params.OriginalCount = RemoteNbOrginalBlocks;
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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((void *) &txBlockx[i].m_protectedBlock, 0, sizeof(RemoteProtectedBlock));
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}
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txBlockx[i].m_header.m_frameIndex = frameIndex;
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txBlockx[i].m_header.m_blockIndex = i;
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txBlockx[i].m_header.m_sampleBytes = (SDR_RX_SAMP_SZ <= 16 ? 2 : 4);
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txBlockx[i].m_header.m_sampleBits = SDR_RX_SAMP_SZ;
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descriptorBlocks[i].Block = (void *) &(txBlockx[i].m_protectedBlock);
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descriptorBlocks[i].Index = txBlockx[i].m_header.m_blockIndex;
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}
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// Encode FEC blocks
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if (m_cm256p->cm256_encode(cm256Params, descriptorBlocks, fecBlocks))
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{
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qWarning("RemoteSinkSender::handleDataBlock: CM256 encode failed. No transmission.");
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// TODO: send without FEC changing meta data to set indication of no FEC
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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].m_protectedBlock = fecBlocks[i];
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}
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// Transmit all blocks
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if (m_socket)
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{
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for (int i = 0; i < cm256Params.OriginalCount + cm256Params.RecoveryCount; i++)
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{
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// send block via UDP
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m_socket->writeDatagram((const char*)&txBlockx[i], (qint64 ) RemoteUdpSize, m_address, dataPort);
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std::this_thread::sleep_for(std::chrono::microseconds(txDelay));
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}
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}
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}
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dataBlock->m_txControlBlock.m_processed = true;
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}
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