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sdrangel/plugins/channelrx/demodam/amdemod.cpp

633 lines
22 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 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 //
// //
// 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "amdemod.h"
#include <QTime>
#include <QDebug>
#include <stdio.h>
#include <complex.h>
#include "SWGChannelSettings.h"
#include "SWGAMDemodSettings.h"
#include "SWGChannelReport.h"
#include "SWGAMDemodReport.h"
#include "dsp/downchannelizer.h"
#include "audio/audiooutput.h"
#include "dsp/dspengine.h"
#include "dsp/threadedbasebandsamplesink.h"
#include "dsp/dspcommands.h"
#include "dsp/fftfilt.h"
#include "device/devicesourceapi.h"
#include "util/db.h"
#include "util/stepfunctions.h"
MESSAGE_CLASS_DEFINITION(AMDemod::MsgConfigureAMDemod, Message)
MESSAGE_CLASS_DEFINITION(AMDemod::MsgConfigureChannelizer, Message)
const QString AMDemod::m_channelIdURI = "sdrangel.channel.amdemod";
const QString AMDemod::m_channelId = "AMDemod";
const int AMDemod::m_udpBlockSize = 512;
AMDemod::AMDemod(DeviceSourceAPI *deviceAPI) :
ChannelSinkAPI(m_channelIdURI),
m_deviceAPI(deviceAPI),
m_inputSampleRate(48000),
m_inputFrequencyOffset(0),
m_running(false),
m_squelchOpen(false),
m_squelchDelayLine(9600),
m_magsqSum(0.0f),
m_magsqPeak(0.0f),
m_magsqCount(0),
m_volumeAGC(0.003),
m_syncAMAGC(12000, 0.1, 1e-2),
m_audioFifo(48000),
m_settingsMutex(QMutex::Recursive)
{
setObjectName(m_channelId);
m_audioBuffer.resize(1<<14);
m_audioBufferFill = 0;
m_magsq = 0.0;
DSPEngine::instance()->getAudioDeviceManager()->addAudioSink(&m_audioFifo, getInputMessageQueue());
m_audioSampleRate = DSPEngine::instance()->getAudioDeviceManager()->getOutputSampleRate();
DSBFilter = new fftfilt((2.0f * m_settings.m_rfBandwidth) / m_audioSampleRate, 2 * 1024);
SSBFilter = new fftfilt(0.0f, m_settings.m_rfBandwidth / m_audioSampleRate, 1024);
m_syncAMAGC.setThresholdEnable(false);
m_syncAMAGC.resize(12000, 6000, 0.1);
applyChannelSettings(m_inputSampleRate, m_inputFrequencyOffset, true);
applySettings(m_settings, true);
m_channelizer = new DownChannelizer(this);
m_threadedChannelizer = new ThreadedBasebandSampleSink(m_channelizer, this);
m_deviceAPI->addThreadedSink(m_threadedChannelizer);
m_deviceAPI->addChannelAPI(this);
m_pllFilt.create(101, m_audioSampleRate, 200.0);
m_pll.computeCoefficients(0.05, 0.707, 1000);
m_syncAMBuffIndex = 0;
}
AMDemod::~AMDemod()
{
DSPEngine::instance()->getAudioDeviceManager()->removeAudioSink(&m_audioFifo);
m_deviceAPI->removeChannelAPI(this);
m_deviceAPI->removeThreadedSink(m_threadedChannelizer);
delete m_threadedChannelizer;
delete m_channelizer;
delete DSBFilter;
delete SSBFilter;
}
void AMDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool firstOfBurst __attribute__((unused)))
{
Complex ci;
if (!m_running) {
return;
}
m_settingsMutex.lock();
for (SampleVector::const_iterator it = begin; it != end; ++it)
{
Complex c(it->real(), it->imag());
c *= m_nco.nextIQ();
if (m_interpolatorDistance < 1.0f) // interpolate
{
processOneSample(ci);
while (m_interpolator.interpolate(&m_interpolatorDistanceRemain, c, &ci))
{
processOneSample(ci);
}
m_interpolatorDistanceRemain += m_interpolatorDistance;
}
else // decimate
{
if (m_interpolator.decimate(&m_interpolatorDistanceRemain, c, &ci))
{
processOneSample(ci);
m_interpolatorDistanceRemain += m_interpolatorDistance;
}
}
}
if (m_audioBufferFill > 0)
{
uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill);
if (res != m_audioBufferFill)
{
qDebug("AMDemod::feed: %u/%u tail samples written", res, m_audioBufferFill);
}
m_audioBufferFill = 0;
}
m_settingsMutex.unlock();
}
void AMDemod::processOneSample(Complex &ci)
{
Real re = ci.real() / SDR_RX_SCALEF;
Real im = ci.imag() / SDR_RX_SCALEF;
Real magsq = re*re + im*im;
m_movingAverage(magsq);
m_magsq = m_movingAverage.asDouble();
m_magsqSum += magsq;
if (magsq > m_magsqPeak)
{
m_magsqPeak = magsq;
}
m_magsqCount++;
m_squelchDelayLine.write(magsq);
if (m_magsq < m_squelchLevel)
{
if (m_squelchCount > 0) {
m_squelchCount--;
}
}
else
{
if (m_squelchCount < m_audioSampleRate / 10) {
m_squelchCount++;
}
}
qint16 sample;
m_squelchOpen = (m_squelchCount >= m_audioSampleRate / 20);
if (m_squelchOpen && !m_settings.m_audioMute)
{
Real demod;
if (m_settings.m_pll)
{
std::complex<float> s(re, im);
s = m_pllFilt.filter(s);
m_pll.feed(s.real(), s.imag());
float yr = re * m_pll.getImag() - im * m_pll.getReal();
float yi = re * m_pll.getReal() + im * m_pll.getImag();
fftfilt::cmplx *sideband;
std::complex<float> cs(yr, yi);
int n_out;
if (m_settings.m_syncAMOperation == AMDemodSettings::SyncAMDSB) {
n_out = DSBFilter->runDSB(cs, &sideband, false);
} else {
n_out = SSBFilter->runSSB(cs, &sideband, m_settings.m_syncAMOperation == AMDemodSettings::SyncAMUSB, false);
}
for (int i = 0; i < n_out; i++)
{
float agcVal = m_syncAMAGC.feedAndGetValue(sideband[i]);
fftfilt::cmplx z = sideband[i] * agcVal; // * m_syncAMAGC.getStepValue();
if (m_settings.m_syncAMOperation == AMDemodSettings::SyncAMDSB) {
m_syncAMBuff[i] = (z.real() + z.imag());
} else if (m_settings.m_syncAMOperation == AMDemodSettings::SyncAMUSB) {
m_syncAMBuff[i] = (z.real() + z.imag());
} else {
m_syncAMBuff[i] = (z.real() + z.imag());
}
// if (m_settings.m_syncAMOperation == AMDemodSettings::SyncAMDSB) {
// m_syncAMBuff[i] = (sideband[i].real() + sideband[i].imag())/2.0f;
// } else if (m_settings.m_syncAMOperation == AMDemodSettings::SyncAMUSB) {
// m_syncAMBuff[i] = (sideband[i].real() + sideband[i].imag());
// } else {
// m_syncAMBuff[i] = (sideband[i].real() + sideband[i].imag());
// }
m_syncAMBuffIndex = 0;
}
m_syncAMBuffIndex = m_syncAMBuffIndex < 2*1024 ? m_syncAMBuffIndex : 0;
demod = m_syncAMBuff[m_syncAMBuffIndex++]*4.0f; // mos pifometrico
// demod = m_syncAMBuff[m_syncAMBuffIndex++]*(SDR_RX_SCALEF/602.0f);
// m_volumeAGC.feed(demod);
// demod /= (10.0*m_volumeAGC.getValue());
}
else
{
demod = sqrt(m_squelchDelayLine.readBack(m_audioSampleRate/20));
m_volumeAGC.feed(demod);
demod = (demod - m_volumeAGC.getValue()) / m_volumeAGC.getValue();
}
if (m_settings.m_bandpassEnable)
{
demod = m_bandpass.filter(demod);
demod /= 301.0f;
}
Real attack = (m_squelchCount - 0.05f * m_audioSampleRate) / (0.05f * m_audioSampleRate);
sample = demod * StepFunctions::smootherstep(attack) * (m_audioSampleRate/24) * m_settings.m_volume;
}
else
{
sample = 0;
}
m_audioBuffer[m_audioBufferFill].l = sample;
m_audioBuffer[m_audioBufferFill].r = sample;
++m_audioBufferFill;
if (m_audioBufferFill >= m_audioBuffer.size())
{
uint res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], m_audioBufferFill);
if (res != m_audioBufferFill)
{
qDebug("AMDemod::processOneSample: %u/%u audio samples written", res, m_audioBufferFill);
m_audioFifo.clear();
}
m_audioBufferFill = 0;
}
}
void AMDemod::start()
{
qDebug("AMDemod::start");
m_squelchCount = 0;
m_audioFifo.clear();
applyChannelSettings(m_inputSampleRate, m_inputFrequencyOffset, true);
m_running = true;
}
void AMDemod::stop()
{
qDebug("AMDemod::stop");
m_running = false;
}
bool AMDemod::handleMessage(const Message& cmd)
{
if (DownChannelizer::MsgChannelizerNotification::match(cmd))
{
DownChannelizer::MsgChannelizerNotification& notif = (DownChannelizer::MsgChannelizerNotification&) cmd;
qDebug() << "AMDemod::handleMessage: MsgChannelizerNotification:"
<< " inputSampleRate: " << notif.getSampleRate()
<< " inputFrequencyOffset: " << notif.getFrequencyOffset();
applyChannelSettings(notif.getSampleRate(), notif.getFrequencyOffset());
return true;
}
else if (MsgConfigureChannelizer::match(cmd))
{
MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
qDebug() << "AMDemod::handleMessage: MsgConfigureChannelizer:"
<< " sampleRate: " << cfg.getSampleRate()
<< " inputFrequencyOffset: " << cfg.getCenterFrequency();
m_channelizer->configure(m_channelizer->getInputMessageQueue(),
cfg.getSampleRate(),
cfg.getCenterFrequency());
return true;
}
else if (MsgConfigureAMDemod::match(cmd))
{
MsgConfigureAMDemod& cfg = (MsgConfigureAMDemod&) cmd;
qDebug() << "AMDemod::handleMessage: MsgConfigureAMDemod";
applySettings(cfg.getSettings(), cfg.getForce());
return true;
}
else if (BasebandSampleSink::MsgThreadedSink::match(cmd))
{
BasebandSampleSink::MsgThreadedSink& cfg = (BasebandSampleSink::MsgThreadedSink&) cmd;
const QThread *thread = cfg.getThread();
qDebug("AMDemod::handleMessage: BasebandSampleSink::MsgThreadedSink: %p", thread);
return true;
}
else if (DSPSignalNotification::match(cmd))
{
return true;
}
else if (DSPConfigureAudio::match(cmd))
{
DSPConfigureAudio& cfg = (DSPConfigureAudio&) cmd;
uint32_t sampleRate = cfg.getSampleRate();
qDebug() << "AMDemod::handleMessage: DSPConfigureAudio:"
<< " sampleRate: " << sampleRate;
if (sampleRate != m_audioSampleRate) {
applyAudioSampleRate(sampleRate);
}
return true;
}
else
{
return false;
}
}
void AMDemod::applyAudioSampleRate(int sampleRate)
{
qDebug("AMDemod::applyAudioSampleRate: %d", sampleRate);
MsgConfigureChannelizer* channelConfigMsg = MsgConfigureChannelizer::create(
sampleRate, m_settings.m_inputFrequencyOffset);
m_inputMessageQueue.push(channelConfigMsg);
m_settingsMutex.lock();
m_interpolator.create(16, m_inputSampleRate, m_settings.m_rfBandwidth / 2.2f);
m_interpolatorDistanceRemain = 0;
m_interpolatorDistance = (Real) m_inputSampleRate / (Real) sampleRate;
m_bandpass.create(301, sampleRate, 300.0, m_settings.m_rfBandwidth / 2.0f);
m_audioFifo.setSize(sampleRate);
m_squelchDelayLine.resize(sampleRate/5);
DSBFilter->create_dsb_filter((2.0f * m_settings.m_rfBandwidth) / (float) sampleRate);
m_pllFilt.create(101, sampleRate, 200.0);
if (m_settings.m_pll) {
m_volumeAGC.resizeNew(sampleRate, 0.003);
} else {
m_volumeAGC.resizeNew(sampleRate/10, 0.003);
}
m_syncAMAGC.resize(sampleRate/4, sampleRate/8, 0.1);
m_pll.setSampleRate(sampleRate);
m_settingsMutex.unlock();
m_audioSampleRate = sampleRate;
}
void AMDemod::applyChannelSettings(int inputSampleRate, int inputFrequencyOffset, bool force)
{
qDebug() << "AMDemod::applyChannelSettings:"
<< " inputSampleRate: " << inputSampleRate
<< " inputFrequencyOffset: " << inputFrequencyOffset;
if ((m_inputFrequencyOffset != inputFrequencyOffset) ||
(m_inputSampleRate != inputSampleRate) || force)
{
m_nco.setFreq(-inputFrequencyOffset, inputSampleRate);
}
if ((m_inputSampleRate != inputSampleRate) || force)
{
m_settingsMutex.lock();
m_interpolator.create(16, inputSampleRate, m_settings.m_rfBandwidth / 2.2f);
m_interpolatorDistanceRemain = 0;
m_interpolatorDistance = (Real) inputSampleRate / (Real) m_audioSampleRate;
m_settingsMutex.unlock();
}
m_inputSampleRate = inputSampleRate;
m_inputFrequencyOffset = inputFrequencyOffset;
}
void AMDemod::applySettings(const AMDemodSettings& settings, bool force)
{
qDebug() << "AMDemod::applySettings:"
<< " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset
<< " m_rfBandwidth: " << settings.m_rfBandwidth
<< " m_volume: " << settings.m_volume
<< " m_squelch: " << settings.m_squelch
<< " m_audioMute: " << settings.m_audioMute
<< " m_bandpassEnable: " << settings.m_bandpassEnable
<< " m_audioDeviceName: " << settings.m_audioDeviceName
<< " m_pll: " << settings.m_pll
<< " m_syncAMOperation: " << (int) settings.m_syncAMOperation
<< " force: " << force;
if((m_settings.m_rfBandwidth != settings.m_rfBandwidth) ||
(m_settings.m_bandpassEnable != settings.m_bandpassEnable) || force)
{
m_settingsMutex.lock();
m_interpolator.create(16, m_inputSampleRate, settings.m_rfBandwidth / 2.2f);
m_interpolatorDistanceRemain = 0;
m_interpolatorDistance = (Real) m_inputSampleRate / (Real) m_audioSampleRate;
m_bandpass.create(301, m_audioSampleRate, 300.0, settings.m_rfBandwidth / 2.0f);
DSBFilter->create_dsb_filter((2.0f * settings.m_rfBandwidth) / (float) m_audioSampleRate);
m_settingsMutex.unlock();
}
if ((m_settings.m_squelch != settings.m_squelch) || force)
{
m_squelchLevel = CalcDb::powerFromdB(settings.m_squelch);
}
if ((settings.m_audioDeviceName != m_settings.m_audioDeviceName) || force)
{
AudioDeviceManager *audioDeviceManager = DSPEngine::instance()->getAudioDeviceManager();
int audioDeviceIndex = audioDeviceManager->getOutputDeviceIndex(settings.m_audioDeviceName);
//qDebug("AMDemod::applySettings: audioDeviceName: %s audioDeviceIndex: %d", qPrintable(settings.m_audioDeviceName), audioDeviceIndex);
audioDeviceManager->addAudioSink(&m_audioFifo, getInputMessageQueue(), audioDeviceIndex);
uint32_t audioSampleRate = audioDeviceManager->getOutputSampleRate(audioDeviceIndex);
if (m_audioSampleRate != audioSampleRate) {
applyAudioSampleRate(audioSampleRate);
}
}
if ((m_settings.m_pll != settings.m_pll) || force)
{
if (settings.m_pll)
{
m_volumeAGC.resizeNew(m_audioSampleRate/4, 0.003);
m_syncAMBuffIndex = 0;
}
else
{
m_volumeAGC.resizeNew(m_audioSampleRate/10, 0.003);
}
}
if ((m_settings.m_syncAMOperation != settings.m_syncAMOperation) || force) {
m_syncAMBuffIndex = 0;
}
m_settings = settings;
}
QByteArray AMDemod::serialize() const
{
return m_settings.serialize();
}
bool AMDemod::deserialize(const QByteArray& data)
{
if (m_settings.deserialize(data))
{
MsgConfigureAMDemod *msg = MsgConfigureAMDemod::create(m_settings, true);
m_inputMessageQueue.push(msg);
return true;
}
else
{
m_settings.resetToDefaults();
MsgConfigureAMDemod *msg = MsgConfigureAMDemod::create(m_settings, true);
m_inputMessageQueue.push(msg);
return false;
}
}
int AMDemod::webapiSettingsGet(
SWGSDRangel::SWGChannelSettings& response,
QString& errorMessage __attribute__((unused)))
{
response.setAmDemodSettings(new SWGSDRangel::SWGAMDemodSettings());
response.getAmDemodSettings()->init();
webapiFormatChannelSettings(response, m_settings);
return 200;
}
int AMDemod::webapiSettingsPutPatch(
bool force,
const QStringList& channelSettingsKeys,
SWGSDRangel::SWGChannelSettings& response,
QString& errorMessage __attribute__((unused)))
{
AMDemodSettings settings = m_settings;
bool frequencyOffsetChanged = false;
if (channelSettingsKeys.contains("audioMute")) {
settings.m_audioMute = response.getAmDemodSettings()->getAudioMute() != 0;
}
if (channelSettingsKeys.contains("inputFrequencyOffset"))
{
settings.m_inputFrequencyOffset = response.getAmDemodSettings()->getInputFrequencyOffset();
frequencyOffsetChanged = true;
}
if (channelSettingsKeys.contains("rfBandwidth")) {
settings.m_rfBandwidth = response.getAmDemodSettings()->getRfBandwidth();
}
if (channelSettingsKeys.contains("rgbColor")) {
settings.m_rgbColor = response.getAmDemodSettings()->getRgbColor();
}
if (channelSettingsKeys.contains("squelch")) {
settings.m_squelch = response.getAmDemodSettings()->getSquelch();
}
if (channelSettingsKeys.contains("title")) {
settings.m_title = *response.getAmDemodSettings()->getTitle();
}
if (channelSettingsKeys.contains("volume")) {
settings.m_volume = response.getAmDemodSettings()->getVolume();
}
if (channelSettingsKeys.contains("bandpassEnable")) {
settings.m_bandpassEnable = response.getAmDemodSettings()->getBandpassEnable() != 0;
}
if (channelSettingsKeys.contains("audioDeviceName")) {
settings.m_audioDeviceName = *response.getAmDemodSettings()->getAudioDeviceName();
}
if (channelSettingsKeys.contains("pll")) {
settings.m_pll = response.getAmDemodSettings()->getPll();
}
if (channelSettingsKeys.contains("syncAMOperation")) {
qint32 syncAMOperationCode = response.getAmDemodSettings()->getSyncAmOperation();
settings.m_syncAMOperation = syncAMOperationCode < 0 ?
AMDemodSettings::SyncAMDSB : syncAMOperationCode > 2 ?
AMDemodSettings::SyncAMDSB : (AMDemodSettings::SyncAMOperation) syncAMOperationCode;
}
if (frequencyOffsetChanged)
{
MsgConfigureChannelizer* channelConfigMsg = MsgConfigureChannelizer::create(
m_audioSampleRate, settings.m_inputFrequencyOffset);
m_inputMessageQueue.push(channelConfigMsg);
}
MsgConfigureAMDemod *msg = MsgConfigureAMDemod::create(settings, force);
m_inputMessageQueue.push(msg);
qDebug("AMDemod::webapiSettingsPutPatch: forward to GUI: %p", m_guiMessageQueue);
if (m_guiMessageQueue) // forward to GUI if any
{
MsgConfigureAMDemod *msgToGUI = MsgConfigureAMDemod::create(settings, force);
m_guiMessageQueue->push(msgToGUI);
}
webapiFormatChannelSettings(response, settings);
return 200;
}
int AMDemod::webapiReportGet(
SWGSDRangel::SWGChannelReport& response,
QString& errorMessage __attribute__((unused)))
{
response.setAmDemodReport(new SWGSDRangel::SWGAMDemodReport());
response.getAmDemodReport()->init();
webapiFormatChannelReport(response);
return 200;
}
void AMDemod::webapiFormatChannelSettings(SWGSDRangel::SWGChannelSettings& response, const AMDemodSettings& settings)
{
response.getAmDemodSettings()->setAudioMute(settings.m_audioMute ? 1 : 0);
response.getAmDemodSettings()->setInputFrequencyOffset(settings.m_inputFrequencyOffset);
response.getAmDemodSettings()->setRfBandwidth(settings.m_rfBandwidth);
response.getAmDemodSettings()->setRgbColor(settings.m_rgbColor);
response.getAmDemodSettings()->setSquelch(settings.m_squelch);
response.getAmDemodSettings()->setVolume(settings.m_volume);
response.getAmDemodSettings()->setBandpassEnable(settings.m_bandpassEnable ? 1 : 0);
if (response.getAmDemodSettings()->getTitle()) {
*response.getAmDemodSettings()->getTitle() = settings.m_title;
} else {
response.getAmDemodSettings()->setTitle(new QString(settings.m_title));
}
if (response.getAmDemodSettings()->getAudioDeviceName()) {
*response.getAmDemodSettings()->getAudioDeviceName() = settings.m_audioDeviceName;
} else {
response.getAmDemodSettings()->setAudioDeviceName(new QString(settings.m_audioDeviceName));
}
response.getAmDemodSettings()->setPll(settings.m_pll ? 1 : 0);
response.getAmDemodSettings()->setSyncAmOperation((int) m_settings.m_syncAMOperation);
}
void AMDemod::webapiFormatChannelReport(SWGSDRangel::SWGChannelReport& response)
{
double magsqAvg, magsqPeak;
int nbMagsqSamples;
getMagSqLevels(magsqAvg, magsqPeak, nbMagsqSamples);
response.getAmDemodReport()->setChannelPowerDb(CalcDb::dbPower(magsqAvg));
response.getAmDemodReport()->setSquelch(m_squelchOpen ? 1 : 0);
response.getAmDemodReport()->setAudioSampleRate(m_audioSampleRate);
response.getAmDemodReport()->setChannelSampleRate(m_inputSampleRate);
}