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TCP SSB FFT.
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f1c223f297
commit
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@ -25,6 +25,9 @@ TCPSrc::TCPSrc(MessageQueue* uiMessageQueue, TCPSrcGUI* tcpSrcGUI, SampleSink* s
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m_spectrumEnabled = false;
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m_spectrumEnabled = false;
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m_nextSSBId = 0;
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m_nextSSBId = 0;
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m_nextS16leId = 0;
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m_nextS16leId = 0;
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TCPFilter = new fftfilt(0.01, 16.0 / 48.0, ssbFftLen);
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// if (!TCPFilter) segfault;
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}
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}
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TCPSrc::~TCPSrc()
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TCPSrc::~TCPSrc()
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@ -46,6 +49,11 @@ void TCPSrc::setSpectrum(MessageQueue* messageQueue, bool enabled)
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void TCPSrc::feed(SampleVector::const_iterator begin, SampleVector::const_iterator end, bool positiveOnly)
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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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{
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Complex ci;
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Complex ci;
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Complex* sideband;
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m_sampleBuffer.clear();
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m_sampleBufferSSB.clear();
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for(SampleVector::const_iterator it = begin; it < end; ++it) {
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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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Complex c(it->real() / 32768.0, it->imag() / 32768.0);
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c *= m_nco.nextIQ();
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c *= m_nco.nextIQ();
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@ -64,15 +72,17 @@ void TCPSrc::feed(SampleVector::const_iterator begin, SampleVector::const_iterat
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if(m_ssbSockets.count() > 0) {
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if(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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for(SampleVector::const_iterator it = m_sampleBuffer.begin(); it != m_sampleBuffer.end(); ++it) {
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// TODO: fft filter
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Complex cj(it->real() / 20000.0, it->imag() / 20000.0);
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m_sampleBufferSSB.push_back(it->real() + it->imag());
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int n_out = TCPFilter->run(cj, &sideband, true);
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for (int i = 0; i < n_out; i+=2) {
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Real one = (sideband[i].real() + sideband[i].imag()) * 0.7 * 20000.0;
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Real two = (sideband[i+1].real() + sideband[i+1].imag()) * 0.7 * 20000.0;
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m_sampleBufferSSB.push_back(Sample(one, two));
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}
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for(int i = 0; (n_out > 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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}
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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], m_sampleBufferSSB.size());
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}
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}
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m_sampleBuffer.clear();
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m_sampleBufferSSB.clear();
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}
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}
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void TCPSrc::start()
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void TCPSrc::start()
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@ -116,6 +126,7 @@ bool TCPSrc::handleMessage(Message* cmd)
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}
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}
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m_interpolator.create(16, m_inputSampleRate, m_rfBandwidth / 2.1);
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m_interpolator.create(16, m_inputSampleRate, m_rfBandwidth / 2.1);
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m_sampleDistanceRemain = m_inputSampleRate / m_outputSampleRate;
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m_sampleDistanceRemain = m_inputSampleRate / m_outputSampleRate;
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TCPFilter->create_filter(0.3f / 48.0f, m_rfBandwidth / 2.0 / m_outputSampleRate);
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cmd->completed();
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cmd->completed();
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return true;
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return true;
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} else if(MsgTCPSrcSpectrum::match(cmd)) {
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} else if(MsgTCPSrcSpectrum::match(cmd)) {
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@ -4,9 +4,12 @@
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#include <QHostAddress>
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#include <QHostAddress>
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#include "dsp/samplesink.h"
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#include "dsp/samplesink.h"
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#include "dsp/nco.h"
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#include "dsp/nco.h"
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#include "dsp/fftfilt.h"
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#include "dsp/interpolator.h"
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#include "dsp/interpolator.h"
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#include "util/message.h"
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#include "util/message.h"
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#define ssbFftLen 1024
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class QTcpServer;
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class QTcpServer;
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class QTcpSocket;
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class QTcpSocket;
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class TCPSrcGUI;
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class TCPSrcGUI;
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@ -122,9 +125,10 @@ protected:
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NCO m_nco;
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NCO m_nco;
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Interpolator m_interpolator;
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Interpolator m_interpolator;
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Real m_sampleDistanceRemain;
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Real m_sampleDistanceRemain;
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fftfilt* TCPFilter;
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SampleVector m_sampleBuffer;
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SampleVector m_sampleBuffer;
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std::vector<qint16> m_sampleBufferSSB;
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SampleVector m_sampleBufferSSB;
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SampleSink* m_spectrum;
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SampleSink* m_spectrum;
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bool m_spectrumEnabled;
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bool m_spectrumEnabled;
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