mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-01 20:45:18 -05:00
127 lines
4.3 KiB
C++
127 lines
4.3 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2019 Edouard Griffiths, F4EXB //
|
|
// Copyright (C) 2021 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_APTDEMODSINK_H
|
|
#define INCLUDE_APTDEMODSINK_H
|
|
|
|
#include "dsp/channelsamplesink.h"
|
|
#include "dsp/phasediscri.h"
|
|
#include "dsp/nco.h"
|
|
#include "dsp/interpolator.h"
|
|
#include "dsp/firfilter.h"
|
|
#include "util/movingaverage.h"
|
|
#include "util/doublebufferfifo.h"
|
|
#include "util/messagequeue.h"
|
|
|
|
#include "aptdemodsettings.h"
|
|
#include <apt.h>
|
|
|
|
#include <vector>
|
|
#include <iostream>
|
|
#include <fstream>
|
|
|
|
// FIXME: Use lower sample rate for better SNR?
|
|
// Do we want an audio filter? Subcarrier at 2800Hz. Does libaptdec have one?
|
|
#define APTDEMOD_AUDIO_SAMPLE_RATE 48000
|
|
// Lines are 2 per second -> 4160 words per second
|
|
|
|
class APTDemod;
|
|
|
|
class APTDemodSink : public ChannelSampleSink {
|
|
public:
|
|
APTDemodSink(APTDemod *packetDemod);
|
|
~APTDemodSink();
|
|
|
|
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end);
|
|
|
|
void applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force = false);
|
|
void applySettings(const APTDemodSettings& settings, bool force = false);
|
|
void setImageWorkerMessageQueue(MessageQueue *messageQueue) { m_imageWorkerMessageQueue = messageQueue; }
|
|
|
|
double getMagSq() const { return m_magsq; }
|
|
|
|
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;
|
|
}
|
|
|
|
int getSamples(float *samples, int count);
|
|
void resetDecoder();
|
|
|
|
private:
|
|
struct MagSqLevelsStore
|
|
{
|
|
MagSqLevelsStore() :
|
|
m_magsq(1e-12),
|
|
m_magsqPeak(1e-12)
|
|
{}
|
|
double m_magsq;
|
|
double m_magsqPeak;
|
|
};
|
|
|
|
APTDemod *m_aptDemod;
|
|
APTDemodSettings m_settings;
|
|
int m_channelSampleRate;
|
|
int m_channelFrequencyOffset;
|
|
|
|
NCO m_nco;
|
|
Interpolator m_interpolator;
|
|
Real m_interpolatorDistance;
|
|
Real m_interpolatorDistanceRemain;
|
|
|
|
double m_magsq;
|
|
double m_magsqSum;
|
|
double m_magsqPeak;
|
|
int m_magsqCount;
|
|
MagSqLevelsStore m_magSqLevelStore;
|
|
|
|
MessageQueue *m_imageWorkerMessageQueue;
|
|
|
|
MovingAverageUtil<Real, double, 16> m_movingAverage;
|
|
|
|
PhaseDiscriminators m_phaseDiscri;
|
|
|
|
// Audio buffer - should probably use a FIFO
|
|
float *m_samples;
|
|
int m_sampleCount;
|
|
int m_samplesLength;
|
|
int m_readIdx;
|
|
int m_writeIdx;
|
|
|
|
int m_row; // Row of image currently being received
|
|
int m_zenith; // Row number of Zenith
|
|
|
|
void processOneSample(Complex &ci);
|
|
MessageQueue *getImageWorkerMessageQueue() { return m_imageWorkerMessageQueue; }
|
|
};
|
|
|
|
#endif // INCLUDE_APTDEMODSINK_H
|