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331 lines
10 KiB
C++
331 lines
10 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017-2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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 "udpsourceudphandler.h"
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#include <QDebug>
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#include <stdint.h>
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#include <algorithm>
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#include "udpsourcemsg.h"
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MESSAGE_CLASS_DEFINITION(UDPSourceUDPHandler::MsgUDPAddressAndPort, Message)
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UDPSourceUDPHandler::UDPSourceUDPHandler() :
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m_dataSocket(nullptr),
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m_dataAddress(QHostAddress::LocalHost),
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m_remoteAddress(QHostAddress::LocalHost),
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m_multicastAddress(QStringLiteral("224.0.0.1")),
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m_dataPort(9999),
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m_remotePort(0),
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m_dataConnected(false),
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m_multicast(false),
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m_udpDumpIndex(0),
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m_nbUDPFrames(m_minNbUDPFrames),
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m_nbAllocatedUDPFrames(m_minNbUDPFrames),
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m_writeFrameIndex(0),
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m_readFrameIndex(m_minNbUDPFrames/2),
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m_readIndex(0),
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m_rwDelta(m_minNbUDPFrames/2),
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m_d(0),
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m_autoRWBalance(true),
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m_feedbackMessageQueue(nullptr)
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{
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m_udpBuf = new udpBlk_t[m_minNbUDPFrames];
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std::fill(m_udpDump, m_udpDump + m_udpBlockSize + 8192, 0);
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connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleMessages()));
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}
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UDPSourceUDPHandler::~UDPSourceUDPHandler()
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{
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stop();
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delete[] m_udpBuf;
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}
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void UDPSourceUDPHandler::start()
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{
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qDebug("UDPSourceUDPHandler::start");
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if (!m_dataSocket) {
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m_dataSocket = new QUdpSocket(this);
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}
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if (!m_dataConnected)
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{
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if (m_dataSocket->bind(m_multicast ? QHostAddress::AnyIPv4 : m_dataAddress, m_dataPort, QUdpSocket::ShareAddress))
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{
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qDebug("UDPSourceUDPHandler::start: bind data socket to %s:%d", m_dataAddress.toString().toStdString().c_str(), m_dataPort);
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if (m_multicast)
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{
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if (m_dataSocket->joinMulticastGroup(m_multicastAddress)) {
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qDebug("UDPSourceUDPHandler::start: joined multicast group %s", qPrintable(m_multicastAddress.toString()));
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} else {
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qDebug("UDPSourceUDPHandler::start: failed joining multicast group %s", qPrintable(m_multicastAddress.toString()));
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}
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}
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connect(m_dataSocket, SIGNAL(readyRead()), this, SLOT(dataReadyRead())); // , Qt::QueuedConnection gets stuck since Qt 5.8.0
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m_dataConnected = true;
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}
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else
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{
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qWarning("UDPSourceUDPHandler::start: cannot bind data socket to %s:%d", m_dataAddress.toString().toStdString().c_str(), m_dataPort);
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m_dataConnected = false;
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}
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}
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}
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void UDPSourceUDPHandler::stop()
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{
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qDebug("UDPSourceUDPHandler::stop");
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if (m_dataConnected)
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{
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m_dataConnected = false;
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disconnect(m_dataSocket, SIGNAL(readyRead()), this, SLOT(dataReadyRead()));
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}
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if (m_dataSocket)
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{
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delete m_dataSocket;
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m_dataSocket = nullptr;
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}
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}
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void UDPSourceUDPHandler::dataReadyRead()
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{
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while (m_dataSocket->hasPendingDatagrams() && m_dataConnected)
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{
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qint64 pendingDataSize = m_dataSocket->pendingDatagramSize();
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qint64 bytesRead = m_dataSocket->readDatagram(&m_udpDump[m_udpDumpIndex], pendingDataSize, &m_remoteAddress, &m_remotePort);
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if (bytesRead < 0)
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{
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qWarning("UDPSourceUDPHandler::dataReadyRead: UDP read error");
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}
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else
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{
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int udpDumpSize = m_udpDumpIndex + bytesRead;
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int udpDumpPtr = 0;
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while (udpDumpSize >= m_udpBlockSize)
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{
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moveData(&m_udpDump[udpDumpPtr]);
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udpDumpPtr += m_udpBlockSize;
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udpDumpSize -= m_udpBlockSize;
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}
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if (udpDumpSize > 0)
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{
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memcpy(m_udpDump, &m_udpDump[udpDumpPtr], udpDumpSize);
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}
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m_udpDumpIndex = udpDumpSize;
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}
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}
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}
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void UDPSourceUDPHandler::moveData(char *blk)
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{
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memcpy(m_udpBuf[m_writeFrameIndex], blk, m_udpBlockSize);
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if (m_writeFrameIndex < m_nbUDPFrames - 1) {
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m_writeFrameIndex++;
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} else {
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m_writeFrameIndex = 0;
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}
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}
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void UDPSourceUDPHandler::readSample(qint16 &t)
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{
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if (m_readFrameIndex == m_writeFrameIndex) // block until more writes
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{
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t = 0;
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}
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else
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{
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memcpy(&t, &m_udpBuf[m_readFrameIndex][m_readIndex], sizeof(qint16));
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advanceReadPointer((int) sizeof(qint16));
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}
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}
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void UDPSourceUDPHandler::readSample(AudioSample &a)
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{
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if (m_readFrameIndex == m_writeFrameIndex) // block until more writes
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{
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a.l = 0;
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a.r = 0;
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}
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else
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{
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memcpy(&a, &m_udpBuf[m_readFrameIndex][m_readIndex], sizeof(AudioSample));
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advanceReadPointer((int) sizeof(AudioSample));
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}
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}
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void UDPSourceUDPHandler::readSample(Sample &s)
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{
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if (m_readFrameIndex == m_writeFrameIndex) // block until more writes
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{
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s.m_real = 0;
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s.m_imag = 0;
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}
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else
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{
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Sample *u = (Sample *) &m_udpBuf[m_readFrameIndex][m_readIndex];
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s = *u;
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advanceReadPointer((int) sizeof(Sample));
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}
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}
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void UDPSourceUDPHandler::advanceReadPointer(int nbBytes)
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{
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if (m_readIndex < m_udpBlockSize - 2*nbBytes)
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{
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m_readIndex += nbBytes;
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}
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else
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{
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m_readIndex = 0;
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if (m_readFrameIndex < m_nbUDPFrames - 1)
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{
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m_readFrameIndex++;
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}
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else
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{
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m_rwDelta = m_writeFrameIndex; // raw R/W delta estimate
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int nbUDPFrames2 = m_nbUDPFrames/2;
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float d = (m_rwDelta - nbUDPFrames2)/(float) m_nbUDPFrames;
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//qDebug("UDPSourceUDPHandler::advanceReadPointer: w: %02d d: %f", m_writeIndex, d);
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if ((d < -0.45) || (d > 0.45))
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{
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resetReadIndex();
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}
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else
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{
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float dd = d - m_d; // derivative
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float c = (d / 15.0) + (dd / 20.0); // damping and scaling
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c = c < -0.05 ? -0.05 : c > 0.05 ? 0.05 : c; // limit
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UDPSourceMessages::MsgSampleRateCorrection *msg = UDPSourceMessages::MsgSampleRateCorrection::create(c, d);
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if (m_autoRWBalance && m_feedbackMessageQueue) {
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m_feedbackMessageQueue->push(msg);
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}
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m_readFrameIndex = 0;
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m_d = d;
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}
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}
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}
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}
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void UDPSourceUDPHandler::configureUDPLink(const QString& address, quint16 port, const QString& multicastAddress, bool multicastJoin)
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{
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Message* msg = MsgUDPAddressAndPort::create(address, port, multicastAddress, multicastJoin);
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m_inputMessageQueue.push(msg);
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}
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void UDPSourceUDPHandler::applyUDPLink(const QString& address, quint16 port, const QString& multicastAddress, bool multicastJoin)
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{
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qDebug() << "UDPSourceUDPHandler::applyUDPLink: "
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<< " address: " << address
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<< " port: " << port
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<< " multicastAddress: " << multicastAddress
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<< " multicastJoin: " << multicastJoin;
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bool addressOK = m_dataAddress.setAddress(address);
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if (!addressOK)
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{
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qWarning("UDPSourceUDPHandler::applyUDPLink: invalid address %s. Set to localhost.", address.toStdString().c_str());
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m_dataAddress = QHostAddress::LocalHost;
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}
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m_multicast = multicastJoin;
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addressOK = m_multicastAddress.setAddress(multicastAddress);
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if (!addressOK)
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{
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qWarning("UDPSourceUDPHandler::applyUDPLink: invalid multicast address %s. disabling multicast.", address.toStdString().c_str());
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m_multicast = false;
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}
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stop();
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m_dataPort = port;
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resetReadIndex();
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start();
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}
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void UDPSourceUDPHandler::resetReadIndex()
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{
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m_readFrameIndex = (m_writeFrameIndex + (m_nbUDPFrames/2)) % m_nbUDPFrames;
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m_rwDelta = m_nbUDPFrames/2;
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m_readIndex = 0;
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m_d = 0.0f;
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}
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void UDPSourceUDPHandler::resizeBuffer(float sampleRate)
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{
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int halfNbFrames = std::max((sampleRate / 375.0), (m_minNbUDPFrames / 2.0));
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qDebug("UDPSourceUDPHandler::resizeBuffer: nb_frames: %d", 2*halfNbFrames);
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if (2*halfNbFrames > m_nbAllocatedUDPFrames)
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{
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delete[] m_udpBuf;
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m_udpBuf = new udpBlk_t[2*halfNbFrames];
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m_nbAllocatedUDPFrames = 2*halfNbFrames;
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}
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m_nbUDPFrames = 2*halfNbFrames;
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m_writeFrameIndex = 0;
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resetReadIndex();
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}
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void UDPSourceUDPHandler::handleMessages()
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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 (handleMessage(*message))
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{
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delete message;
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}
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}
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}
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bool UDPSourceUDPHandler::handleMessage(const Message& cmd)
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{
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if (UDPSourceUDPHandler::MsgUDPAddressAndPort::match(cmd))
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{
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UDPSourceUDPHandler::MsgUDPAddressAndPort& notif = (UDPSourceUDPHandler::MsgUDPAddressAndPort&) cmd;
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applyUDPLink(notif.getAddress(), notif.getPort(), notif.getMulticastAddress(), notif.getMulticastJoin());
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return true;
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}
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else
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{
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return false;
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}
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}
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