mirror of
https://github.com/f4exb/sdrangel.git
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273 lines
9.4 KiB
C++
273 lines
9.4 KiB
C++
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// (C) 2015 John Greb //
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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 <QTcpServer>
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#include <QTcpSocket>
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#include <QThread>
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#include "tcpsrc.h"
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#include "tcpsrcgui.h"
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#include "dsp/dspcommands.h"
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MESSAGE_CLASS_DEFINITION(TCPSrc::MsgTCPSrcConfigure, Message)
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MESSAGE_CLASS_DEFINITION(TCPSrc::MsgTCPSrcConnection, Message)
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MESSAGE_CLASS_DEFINITION(TCPSrc::MsgTCPSrcSpectrum, Message)
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TCPSrc::TCPSrc(MessageQueue* uiMessageQueue, TCPSrcGUI* tcpSrcGUI, SampleSink* spectrum)
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{
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m_inputSampleRate = 96000;
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m_sampleFormat = FormatSSB;
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m_outputSampleRate = 48000;
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m_rfBandwidth = 32000;
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m_tcpPort = 9999;
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m_nco.setFreq(0, m_inputSampleRate);
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m_interpolator.create(16, m_inputSampleRate, m_rfBandwidth / 2.0);
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m_sampleDistanceRemain = m_inputSampleRate / m_outputSampleRate;
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m_uiMessageQueue = uiMessageQueue;
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m_tcpSrcGUI = tcpSrcGUI;
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m_spectrum = spectrum;
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m_spectrumEnabled = false;
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m_nextSSBId = 0;
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m_nextS16leId = 0;
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m_last = 0;
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m_this = 0;
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m_scale = 0;
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m_sampleBufferSSB.resize(tcpFftLen);
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TCPFilter = new fftfilt(0.3 / 48.0, 16.0 / 48.0, tcpFftLen);
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// if (!TCPFilter) segfault;
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}
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TCPSrc::~TCPSrc()
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{
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if (TCPFilter) delete TCPFilter;
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}
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void TCPSrc::configure(MessageQueue* messageQueue, SampleFormat sampleFormat, Real outputSampleRate, Real rfBandwidth, int tcpPort, int boost)
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{
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Message* cmd = MsgTCPSrcConfigure::create(sampleFormat, outputSampleRate, rfBandwidth, tcpPort, boost);
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cmd->submit(messageQueue, this);
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}
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void TCPSrc::setSpectrum(MessageQueue* messageQueue, bool enabled)
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{
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Message* cmd = MsgTCPSrcSpectrum::create(enabled);
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cmd->submit(messageQueue, this);
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}
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void TCPSrc::feed(SampleVector::const_iterator begin, SampleVector::const_iterator end, bool positiveOnly)
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{
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Complex ci;
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fftfilt::cmplx* sideband;
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Real l, r;
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m_sampleBuffer.clear();
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// Rtl-Sdr uses full 16-bit scale; FCDPP does not
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int rescale = 30000 * (1 << m_boost);
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for(SampleVector::const_iterator it = begin; it < end; ++it) {
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Complex c(it->real() / 32768.0, it->imag() / 32768.0);
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c *= m_nco.nextIQ();
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if(m_interpolator.interpolate(&m_sampleDistanceRemain, c, &ci)) {
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m_sampleBuffer.push_back(Sample(ci.real() * rescale, ci.imag() * rescale));
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m_sampleDistanceRemain += m_inputSampleRate / m_outputSampleRate;
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}
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}
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if((m_spectrum != NULL) && (m_spectrumEnabled))
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m_spectrum->feed(m_sampleBuffer.begin(), m_sampleBuffer.end(), positiveOnly);
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for(int i = 0; i < m_s16leSockets.count(); i++)
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m_s16leSockets[i].socket->write((const char*)&m_sampleBuffer[0], m_sampleBuffer.size() * 4);
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if((m_sampleFormat == FormatSSB) && (m_ssbSockets.count() > 0)) {
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for(SampleVector::const_iterator it = m_sampleBuffer.begin(); it != m_sampleBuffer.end(); ++it) {
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Complex cj(it->real() / 30000.0, it->imag() / 30000.0);
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int n_out = TCPFilter->runSSB(cj, &sideband, true);
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if (n_out) {
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for (int i = 0; i < n_out; i+=2) {
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l = (sideband[i].real() + sideband[i].imag()) * 0.7 * 32000.0;
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r = (sideband[i+1].real() + sideband[i+1].imag()) * 0.7 * 32000.0;
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m_sampleBufferSSB.push_back(Sample(l, r));
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}
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for(int i = 0; i < m_ssbSockets.count(); i++)
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m_ssbSockets[i].socket->write((const char*)&m_sampleBufferSSB[0], n_out * 2);
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m_sampleBufferSSB.clear();
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}
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}
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}
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if((m_sampleFormat == FormatNFM) && (m_ssbSockets.count() > 0)) {
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for(SampleVector::const_iterator it = m_sampleBuffer.begin(); it != m_sampleBuffer.end(); ++it) {
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Complex cj(it->real() / 30000.0, it->imag() / 30000.0);
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// An FFT filter here is overkill, but was already set up for SSB
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int n_out = TCPFilter->runFilt(cj, &sideband);
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if (n_out) {
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Real sum = 1.0;
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for (int i = 0; i < n_out; i+=2) {
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l = m_this.real() * (m_last.imag() - sideband[i].imag())
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- m_this.imag() * (m_last.real() - sideband[i].real());
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m_last = sideband[i];
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r = m_last.real() * (m_this.imag() - sideband[i+1].imag())
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- m_last.imag() * (m_this.real() - sideband[i+1].real());
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m_this = sideband[i+1];
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m_sampleBufferSSB.push_back(Sample(l * m_scale, r * m_scale));
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sum += m_this.real() * m_this.real() + m_this.imag() * m_this.imag();
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}
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// TODO: correct levels
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m_scale = 24000 * tcpFftLen / sum;
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for(int i = 0; i < m_ssbSockets.count(); i++)
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m_ssbSockets[i].socket->write((const char*)&m_sampleBufferSSB[0], n_out * 2);
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m_sampleBufferSSB.clear();
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}
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}
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}
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}
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void TCPSrc::start()
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{
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m_tcpServer = new QTcpServer();
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connect(m_tcpServer, SIGNAL(newConnection()), this, SLOT(onNewConnection()));
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m_tcpServer->listen(QHostAddress::Any, m_tcpPort);
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}
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void TCPSrc::stop()
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{
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closeAllSockets(&m_ssbSockets);
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closeAllSockets(&m_s16leSockets);
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if(m_tcpServer->isListening())
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m_tcpServer->close();
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delete m_tcpServer;
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}
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bool TCPSrc::handleMessage(Message* cmd)
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{
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if(DSPSignalNotification::match(cmd)) {
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DSPSignalNotification* signal = (DSPSignalNotification*)cmd;
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qDebug("%d samples/sec, %lld Hz offset", signal->getSampleRate(), signal->getFrequencyOffset());
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m_inputSampleRate = signal->getSampleRate();
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m_nco.setFreq(-signal->getFrequencyOffset(), m_inputSampleRate);
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m_interpolator.create(16, m_inputSampleRate, m_rfBandwidth / 2.0);
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m_sampleDistanceRemain = m_inputSampleRate / m_outputSampleRate;
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cmd->completed();
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return true;
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} else if(MsgTCPSrcConfigure::match(cmd)) {
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MsgTCPSrcConfigure* cfg = (MsgTCPSrcConfigure*)cmd;
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m_sampleFormat = cfg->getSampleFormat();
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m_outputSampleRate = cfg->getOutputSampleRate();
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m_rfBandwidth = cfg->getRFBandwidth();
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if(cfg->getTCPPort() != m_tcpPort) {
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m_tcpPort = cfg->getTCPPort();
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if(m_tcpServer->isListening())
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m_tcpServer->close();
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m_tcpServer->listen(QHostAddress::Any, m_tcpPort);
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}
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m_boost = cfg->getBoost();
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m_interpolator.create(16, m_inputSampleRate, m_rfBandwidth / 2.0);
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m_sampleDistanceRemain = m_inputSampleRate / m_outputSampleRate;
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if (m_sampleFormat == FormatSSB)
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TCPFilter->create_filter(0.3 / 48.0, m_rfBandwidth / 2.0 / m_outputSampleRate);
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else
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TCPFilter->create_filter(0.0, m_rfBandwidth / 2.0 / m_outputSampleRate);
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cmd->completed();
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return true;
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} else if(MsgTCPSrcSpectrum::match(cmd)) {
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MsgTCPSrcSpectrum* spc = (MsgTCPSrcSpectrum*)cmd;
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m_spectrumEnabled = spc->getEnabled();
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cmd->completed();
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return true;
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} else {
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if(m_spectrum != NULL)
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return m_spectrum->handleMessage(cmd);
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else return false;
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}
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}
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void TCPSrc::closeAllSockets(Sockets* sockets)
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{
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for(int i = 0; i < sockets->count(); ++i) {
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MsgTCPSrcConnection* msg = MsgTCPSrcConnection::create(false, sockets->at(i).id, QHostAddress(), 0);
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msg->submit(m_uiMessageQueue, (PluginGUI*)m_tcpSrcGUI);
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sockets->at(i).socket->close();
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}
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}
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void TCPSrc::onNewConnection()
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{
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while(m_tcpServer->hasPendingConnections()) {
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QTcpSocket* connection = m_tcpServer->nextPendingConnection();
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connect(connection, SIGNAL(disconnected()), this, SLOT(onDisconnected()));
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switch(m_sampleFormat) {
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case FormatNFM:
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case FormatSSB: {
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quint32 id = (FormatSSB << 24) | m_nextSSBId;
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MsgTCPSrcConnection* msg = MsgTCPSrcConnection::create(true, id, connection->peerAddress(), connection->peerPort());
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m_nextSSBId = (m_nextSSBId + 1) & 0xffffff;
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m_ssbSockets.push_back(Socket(id, connection));
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msg->submit(m_uiMessageQueue, (PluginGUI*)m_tcpSrcGUI);
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break;
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}
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case FormatS16LE: {
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quint32 id = (FormatS16LE << 24) | m_nextS16leId;
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MsgTCPSrcConnection* msg = MsgTCPSrcConnection::create(true, id, connection->peerAddress(), connection->peerPort());
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m_nextS16leId = (m_nextS16leId + 1) & 0xffffff;
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m_s16leSockets.push_back(Socket(id, connection));
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msg->submit(m_uiMessageQueue, (PluginGUI*)m_tcpSrcGUI);
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break;
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}
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default:
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delete connection;
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break;
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}
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}
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}
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void TCPSrc::onDisconnected()
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{
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quint32 id;
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QTcpSocket* socket = NULL;
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for(int i = 0; i < m_ssbSockets.count(); i++) {
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if(m_ssbSockets[i].socket == sender()) {
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id = m_ssbSockets[i].id;
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socket = m_ssbSockets[i].socket;
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m_ssbSockets.removeAt(i);
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break;
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}
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}
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if(socket == NULL) {
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for(int i = 0; i < m_s16leSockets.count(); i++) {
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if(m_s16leSockets[i].socket == sender()) {
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id = m_s16leSockets[i].id;
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socket = m_s16leSockets[i].socket;
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m_s16leSockets.removeAt(i);
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break;
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}
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}
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}
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if(socket != NULL) {
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MsgTCPSrcConnection* msg = MsgTCPSrcConnection::create(false, id, QHostAddress(), 0);
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msg->submit(m_uiMessageQueue, (PluginGUI*)m_tcpSrcGUI);
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socket->deleteLater();
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}
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}
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