mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-10-01 17:26:40 -04:00
72e4e684e2
Add OpenSky Network aircraft database support, for information about aircraft model, owner, registration. Add airline logos and country & military flags for display in the table. Add OurAirports airport database support, to allow airports and ATC frequencies to be displayed on the map. Allow ATC frequency to be tuned by clicking on the map. Add support for displaying flight paths on the map. Allow columns in table to be rearranged and hidden. Allow rows in table to be sorted by clicking on header. Allow switching units from ft, kn, ft/min to m, kph, m/s Allow aircraft timeout to be set by the user. Allow font used for the table to be set by the user. Add optional display of demodulator statistics. Support multithreading in demodulator to reduce FIFO overflows. Add support for demodulating all Mode-S frames and feeding them. Add support for feeding in Beast hex format. Allow option of correlating against full preamble or partial preamble. Supporting highlighting of an aircraft in the table by selecting it on the map. Use difference of zeros and ones correlation, rather than absolute threshold, to better account for varying conditions and make the threshold easier to set. Enable anti-aliasing for text on the map. Improve CRC performance by 5x-10x. Add HttpDownloadManager class to support downloading of files from the web to disk.
127 lines
5.0 KiB
C++
127 lines
5.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2019 Edouard Griffiths, F4EXB //
|
|
// Copyright (C) 2020 Jon Beniston, M7RCE //
|
|
// //
|
|
// 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/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef INCLUDE_ADSBDEMODSINK_H
|
|
#define INCLUDE_ADSBDEMODSINK_H
|
|
|
|
#include <boost/chrono/chrono.hpp>
|
|
|
|
#include "dsp/channelsamplesink.h"
|
|
#include "dsp/nco.h"
|
|
#include "dsp/interpolator.h"
|
|
#include "util/movingaverage.h"
|
|
|
|
#include "adsbdemodsettings.h"
|
|
#include "adsbdemodstats.h"
|
|
#include "adsbdemodsinkworker.h"
|
|
|
|
class ADSBDemodSink : public ChannelSampleSink {
|
|
public:
|
|
ADSBDemodSink();
|
|
~ADSBDemodSink();
|
|
|
|
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end);
|
|
|
|
void getMagSqLevels(double& avg, double& peak, int& nbSamples)
|
|
{
|
|
if (m_magsqCount > 0)
|
|
{
|
|
m_magsq = m_magsqSum / m_magsqCount;
|
|
m_magSqLevelStore.m_magsq = m_magsq;
|
|
m_magSqLevelStore.m_magsqPeak = m_magsqPeak;
|
|
}
|
|
|
|
avg = m_magSqLevelStore.m_magsq;
|
|
peak = m_magSqLevelStore.m_magsqPeak;
|
|
nbSamples = m_magsqCount == 0 ? 1 : m_magsqCount;
|
|
|
|
m_magsqSum = 0.0f;
|
|
m_magsqPeak = 0.0f;
|
|
m_magsqCount = 0;
|
|
}
|
|
|
|
void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
|
|
void applySettings(const ADSBDemodSettings& settings, bool force = false);
|
|
void setMessageQueueToGUI(MessageQueue *messageQueue) { m_messageQueueToGUI = messageQueue; }
|
|
void setMessageQueueToWorker(MessageQueue *messageQueue) { m_messageQueueToWorker = messageQueue; }
|
|
|
|
private:
|
|
friend ADSBDemodSinkWorker;
|
|
|
|
struct MagSqLevelsStore
|
|
{
|
|
MagSqLevelsStore() :
|
|
m_magsq(1e-12),
|
|
m_magsqPeak(1e-12)
|
|
{}
|
|
double m_magsq;
|
|
double m_magsqPeak;
|
|
};
|
|
|
|
int m_channelSampleRate;
|
|
int m_channelFrequencyOffset;
|
|
ADSBDemodSettings m_settings;
|
|
|
|
NCO m_nco;
|
|
Interpolator m_interpolator;
|
|
Real m_interpolatorDistance;
|
|
Real m_interpolatorDistanceRemain;
|
|
|
|
boost::chrono::steady_clock::time_point m_startPoint;
|
|
double m_feedTime; //!< Time spent in feed()
|
|
|
|
// Triple buffering for sharing sample data between two threads
|
|
// Top area of each buffer is not used by writer, as it's used by the reader
|
|
// for copying the last few samples of the previous buffer, so it can
|
|
// be processed contiguously
|
|
const int m_buffers = 3;
|
|
const int m_bufferSize = 200000;
|
|
Real *m_sampleBuffer[3]; //!< Each buffer is m_bufferSize samples
|
|
QSemaphore m_bufferWrite[3]; //!< Sempahore to control write access to the buffers
|
|
QSemaphore m_bufferRead[3]; //!< Sempahore to control read access from the buffers
|
|
ADSBDemodSinkWorker m_worker; //!< Worker thread that does the actual demodulation
|
|
int m_writeBuffer; //!< Which of the 3 buffers we're writing in to
|
|
int m_writeIdx; //!< Index to to current write buffer
|
|
|
|
// These values are derived from samplesPerBit
|
|
int m_samplesPerFrame; //!< Including preamble
|
|
int m_samplesPerChip;
|
|
|
|
double m_magsq; //!< displayed averaged value
|
|
double m_magsqSum;
|
|
double m_magsqPeak;
|
|
int m_magsqCount;
|
|
MagSqLevelsStore m_magSqLevelStore;
|
|
|
|
MessageQueue *m_messageQueueToGUI;
|
|
MessageQueue *m_messageQueueToWorker;
|
|
|
|
void init(int samplesPerBit);
|
|
void stopWorker();
|
|
Real inline complexMagSq(Complex& ci)
|
|
{
|
|
double magsqRaw = ci.real()*ci.real() + ci.imag()*ci.imag();
|
|
return (Real)(magsqRaw / (SDR_RX_SCALED*SDR_RX_SCALED));
|
|
}
|
|
void processOneSample(Real magsq);
|
|
MessageQueue *getMessageQueueToGUI() { return m_messageQueueToGUI; }
|
|
MessageQueue *getMessageQueueToWorker() { return m_messageQueueToWorker; }
|
|
};
|
|
|
|
#endif // INCLUDE_ADSBDEMODSINK_H
|