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sdrangel/plugins/channelrx/demodfreedv/freedvdemod.h

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2019 Edouard Griffiths, F4EXB //
// //
// 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_FREEDVDEMOD_H
#define INCLUDE_FREEDVDEMOD_H
#include <vector>
#include <QMutex>
#include <QNetworkRequest>
#include "dsp/basebandsamplesink.h"
#include "channel/channelapi.h"
#include "dsp/ncof.h"
#include "dsp/interpolator.h"
#include "dsp/fftfilt.h"
#include "dsp/agc.h"
#include "audio/audiofifo.h"
#include "audio/audioresampler.h"
#include "util/message.h"
#include "util/doublebufferfifo.h"
#include "freedvdemodsettings.h"
#define ssbFftLen 1024
#define agcTarget 3276.8 // -10 dB amplitude => -20 dB power: center of normal signal
class QNetworkAccessManager;
class QNetworkReply;
class DeviceAPI;
class ThreadedBasebandSampleSink;
class DownChannelizer;
struct freedv;
class FreeDVDemod : public BasebandSampleSink, public ChannelAPI {
Q_OBJECT
public:
class MsgConfigureFreeDVDemod : public Message {
MESSAGE_CLASS_DECLARATION
public:
const FreeDVDemodSettings& getSettings() const { return m_settings; }
bool getForce() const { return m_force; }
static MsgConfigureFreeDVDemod* create(const FreeDVDemodSettings& settings, bool force)
{
return new MsgConfigureFreeDVDemod(settings, force);
}
private:
FreeDVDemodSettings m_settings;
bool m_force;
MsgConfigureFreeDVDemod(const FreeDVDemodSettings& settings, bool force) :
Message(),
m_settings(settings),
m_force(force)
{ }
};
class MsgResyncFreeDVDemod : public Message {
MESSAGE_CLASS_DECLARATION
public:
static MsgResyncFreeDVDemod* create() {
return new MsgResyncFreeDVDemod();
}
private:
MsgResyncFreeDVDemod()
{}
};
class MsgConfigureChannelizer : public Message {
MESSAGE_CLASS_DECLARATION
public:
int getSampleRate() const { return m_sampleRate; }
int getCenterFrequency() const { return m_centerFrequency; }
static MsgConfigureChannelizer* create(int sampleRate, int centerFrequency)
{
return new MsgConfigureChannelizer(sampleRate, centerFrequency);
}
private:
int m_sampleRate;
int m_centerFrequency;
MsgConfigureChannelizer(int sampleRate, int centerFrequency) :
Message(),
m_sampleRate(sampleRate),
m_centerFrequency(centerFrequency)
{ }
};
FreeDVDemod(DeviceAPI *deviceAPI);
virtual ~FreeDVDemod();
virtual void destroy() { delete this; }
void setSampleSink(BasebandSampleSink* sampleSink) { m_sampleSink = sampleSink; }
void configure(MessageQueue* messageQueue,
Real Bandwidth,
Real LowCutoff,
Real volume,
int spanLog2,
bool audioBinaural,
bool audioFlipChannels,
bool dsb,
bool audioMute,
bool agc,
bool agcClamping,
int agcTimeLog2,
int agcPowerThreshold,
int agcThresholdGate);
virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool positiveOnly);
virtual void start();
virtual void stop();
virtual bool handleMessage(const Message& cmd);
virtual void getIdentifier(QString& id) { id = objectName(); }
virtual void getTitle(QString& title) { title = m_settings.m_title; }
virtual qint64 getCenterFrequency() const { return m_settings.m_inputFrequencyOffset; }
virtual QByteArray serialize() const;
virtual bool deserialize(const QByteArray& data);
virtual int getNbSinkStreams() const { return 1; }
virtual int getNbSourceStreams() const { return 0; }
virtual qint64 getStreamCenterFrequency(int streamIndex, bool sinkElseSource) const
{
(void) streamIndex;
(void) sinkElseSource;
return m_settings.m_inputFrequencyOffset;
}
uint32_t getAudioSampleRate() const { return m_audioSampleRate; }
uint32_t getModemSampleRate() const { return m_modemSampleRate; }
double getMagSq() const { return m_magsq; }
bool getAudioActive() const { return m_audioActive; }
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 getSNRLevels(double& avg, double& peak, int& nbSamples);
int getBER() const { return m_freeDVStats.m_ber; }
float getFrequencyOffset() const { return m_freeDVStats.m_freqOffset; }
bool isSync() const { return m_freeDVStats.m_sync; }
virtual int webapiSettingsGet(
SWGSDRangel::SWGChannelSettings& response,
QString& errorMessage);
virtual int webapiSettingsPutPatch(
bool force,
const QStringList& channelSettingsKeys,
SWGSDRangel::SWGChannelSettings& response,
QString& errorMessage);
virtual int webapiReportGet(
SWGSDRangel::SWGChannelReport& response,
QString& errorMessage);
static void webapiFormatChannelSettings(
SWGSDRangel::SWGChannelSettings& response,
const FreeDVDemodSettings& settings);
static void webapiUpdateChannelSettings(
FreeDVDemodSettings& settings,
const QStringList& channelSettingsKeys,
SWGSDRangel::SWGChannelSettings& response);
static const QString m_channelIdURI;
static const QString m_channelId;
signals:
/**
* Level changed
* \param rmsLevel RMS level in range 0.0 - 1.0
* \param peakLevel Peak level in range 0.0 - 1.0
* \param numSamples Number of audio samples analyzed
*/
void levelInChanged(qreal rmsLevel, qreal peakLevel, int numSamples);
private:
struct MagSqLevelsStore
{
MagSqLevelsStore() :
m_magsq(1e-12),
m_magsqPeak(1e-12)
{}
double m_magsq;
double m_magsqPeak;
};
struct FreeDVStats
{
FreeDVStats();
void init();
void collect(struct freedv *freedv);
bool m_sync;
float m_snrEst;
float m_clockOffset;
float m_freqOffset;
float m_syncMetric;
int m_totalBitErrors;
int m_lastTotalBitErrors;
int m_ber; //!< estimated BER (b/s)
uint32_t m_frameCount;
uint32_t m_berFrameCount; //!< count of frames for BER estimation
uint32_t m_fps; //!< frames per second
};
struct FreeDVSNR
{
FreeDVSNR();
void accumulate(float snrdB);
double m_sum;
float m_peak;
int m_n;
bool m_reset;
};
struct LevelRMS
{
LevelRMS();
void accumulate(float fsample);
double m_sum;
float m_peak;
int m_n;
bool m_reset;
};
class MsgConfigureFreeDVDemodPrivate : public Message {
MESSAGE_CLASS_DECLARATION
public:
Real getBandwidth() const { return m_Bandwidth; }
Real getLoCutoff() const { return m_LowCutoff; }
Real getVolume() const { return m_volume; }
int getSpanLog2() const { return m_spanLog2; }
bool getAudioBinaural() const { return m_audioBinaural; }
bool getAudioFlipChannels() const { return m_audioFlipChannels; }
bool getDSB() const { return m_dsb; }
bool getAudioMute() const { return m_audioMute; }
bool getAGC() const { return m_agc; }
bool getAGCClamping() const { return m_agcClamping; }
int getAGCTimeLog2() const { return m_agcTimeLog2; }
int getAGCPowerThershold() const { return m_agcPowerThreshold; }
int getAGCThersholdGate() const { return m_agcThresholdGate; }
static MsgConfigureFreeDVDemodPrivate* create(Real Bandwidth,
Real LowCutoff,
Real volume,
int spanLog2,
bool audioBinaural,
bool audioFlipChannels,
bool dsb,
bool audioMute,
bool agc,
bool agcClamping,
int agcTimeLog2,
int agcPowerThreshold,
int agcThresholdGate)
{
return new MsgConfigureFreeDVDemodPrivate(
Bandwidth,
LowCutoff,
volume,
spanLog2,
audioBinaural,
audioFlipChannels,
dsb,
audioMute,
agc,
agcClamping,
agcTimeLog2,
agcPowerThreshold,
agcThresholdGate);
}
private:
Real m_Bandwidth;
Real m_LowCutoff;
Real m_volume;
int m_spanLog2;
bool m_audioBinaural;
bool m_audioFlipChannels;
bool m_dsb;
bool m_audioMute;
bool m_agc;
bool m_agcClamping;
int m_agcTimeLog2;
int m_agcPowerThreshold;
int m_agcThresholdGate;
MsgConfigureFreeDVDemodPrivate(Real Bandwidth,
Real LowCutoff,
Real volume,
int spanLog2,
bool audioBinaural,
bool audioFlipChannels,
bool dsb,
bool audioMute,
bool agc,
bool agcClamping,
int agcTimeLog2,
int agcPowerThreshold,
int agcThresholdGate) :
Message(),
m_Bandwidth(Bandwidth),
m_LowCutoff(LowCutoff),
m_volume(volume),
m_spanLog2(spanLog2),
m_audioBinaural(audioBinaural),
m_audioFlipChannels(audioFlipChannels),
m_dsb(dsb),
m_audioMute(audioMute),
m_agc(agc),
m_agcClamping(agcClamping),
m_agcTimeLog2(agcTimeLog2),
m_agcPowerThreshold(agcPowerThreshold),
m_agcThresholdGate(agcThresholdGate)
{ }
};
DeviceAPI *m_deviceAPI;
ThreadedBasebandSampleSink* m_threadedChannelizer;
DownChannelizer* m_channelizer;
FreeDVDemodSettings m_settings;
Real m_hiCutoff;
Real m_lowCutoff;
Real m_volume;
int m_spanLog2;
fftfilt::cmplx m_sum;
int m_undersampleCount;
int m_inputSampleRate;
uint32_t m_modemSampleRate;
uint32_t m_speechSampleRate;
uint32_t m_audioSampleRate;
int m_inputFrequencyOffset;
bool m_audioMute;
double m_magsq;
double m_magsqSum;
double m_magsqPeak;
int m_magsqCount;
MagSqLevelsStore m_magSqLevelStore;
SimpleAGC<4800> m_simpleAGC;
bool m_agcActive;
DoubleBufferFIFO<fftfilt::cmplx> m_squelchDelayLine;
bool m_audioActive; //!< True if an audio signal is produced (no AGC or AGC and above threshold)
NCOF m_nco;
Interpolator m_interpolator;
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
fftfilt* SSBFilter;
BasebandSampleSink* m_sampleSink;
SampleVector m_sampleBuffer;
AudioVector m_audioBuffer;
uint m_audioBufferFill;
AudioFifo m_audioFifo;
QNetworkAccessManager *m_networkManager;
QNetworkRequest m_networkRequest;
struct freedv *m_freeDV;
int m_nSpeechSamples;
int m_nMaxModemSamples;
int m_nin;
int m_iSpeech;
int m_iModem;
int16_t *m_speechOut;
int16_t *m_modIn;
AudioResampler m_audioResampler;
FreeDVStats m_freeDVStats;
FreeDVSNR m_freeDVSNR;
LevelRMS m_levelIn;
int m_levelInNbSamples;
QMutex m_settingsMutex;
void pushSampleToDV(int16_t sample);
void pushSampleToAudio(int16_t sample);
void applyChannelSettings(int inputSampleRate, int inputFrequencyOffset, bool force = false);
void applySettings(const FreeDVDemodSettings& settings, bool force = false);
void applyAudioSampleRate(int sampleRate);
void applyFreeDVMode(FreeDVDemodSettings::FreeDVMode mode);
void processOneSample(Complex &ci);
void webapiFormatChannelReport(SWGSDRangel::SWGChannelReport& response);
void webapiReverseSendSettings(QList<QString>& channelSettingsKeys, const FreeDVDemodSettings& settings, bool force);
private slots:
void networkManagerFinished(QNetworkReply *reply);
};
#endif // INCLUDE_FREEDVDEMOD_H
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