mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-27 02:09:14 -05:00
469 lines
15 KiB
C++
469 lines
15 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2016 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 <QTime>
|
|
#include <QDebug>
|
|
#include <QMutexLocker>
|
|
|
|
#include <stdio.h>
|
|
#include <complex.h>
|
|
#include <algorithm>
|
|
|
|
#include <dsp/upchannelizer.h>
|
|
#include "dsp/dspengine.h"
|
|
#include "dsp/pidcontroller.h"
|
|
#include "device/devicesinkapi.h"
|
|
#include "dsp/threadedbasebandsamplesource.h"
|
|
|
|
#include "nfmmod.h"
|
|
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgConfigureNFMMod, Message)
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgConfigureChannelizer, Message)
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgConfigureFileSourceName, Message)
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgConfigureFileSourceSeek, Message)
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgConfigureAFInput, Message)
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgConfigureFileSourceStreamTiming, Message)
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgReportFileSourceStreamData, Message)
|
|
MESSAGE_CLASS_DEFINITION(NFMMod::MsgReportFileSourceStreamTiming, Message)
|
|
|
|
const QString NFMMod::m_channelID = "sdrangel.channeltx.modnfm";
|
|
const int NFMMod::m_levelNbSamples = 480; // every 10ms
|
|
|
|
NFMMod::NFMMod(DeviceSinkAPI *deviceAPI) :
|
|
m_deviceAPI(deviceAPI),
|
|
m_absoluteFrequencyOffset(0),
|
|
m_modPhasor(0.0f),
|
|
m_movingAverage(40, 0),
|
|
m_volumeAGC(40, 0),
|
|
m_audioFifo(4800),
|
|
m_settingsMutex(QMutex::Recursive),
|
|
m_fileSize(0),
|
|
m_recordLength(0),
|
|
m_sampleRate(48000),
|
|
m_afInput(NFMModInputNone),
|
|
m_levelCalcCount(0),
|
|
m_peakLevel(0.0f),
|
|
m_levelSum(0.0f)
|
|
{
|
|
setObjectName("NFMod");
|
|
|
|
m_audioBuffer.resize(1<<14);
|
|
m_audioBufferFill = 0;
|
|
|
|
m_movingAverage.resize(16, 0);
|
|
m_volumeAGC.resize(4096, 0.003, 0);
|
|
m_magsq = 0.0;
|
|
|
|
m_toneNco.setFreq(1000.0, m_settings.m_audioSampleRate);
|
|
m_ctcssNco.setFreq(88.5, m_settings.m_audioSampleRate);
|
|
DSPEngine::instance()->addAudioSource(&m_audioFifo);
|
|
|
|
// CW keyer
|
|
m_cwKeyer.setSampleRate(m_settings.m_audioSampleRate);
|
|
m_cwKeyer.setWPM(13);
|
|
m_cwKeyer.setMode(CWKeyer::CWNone);
|
|
|
|
m_channelizer = new UpChannelizer(this);
|
|
m_threadedChannelizer = new ThreadedBasebandSampleSource(m_channelizer, this);
|
|
m_deviceAPI->addThreadedSource(m_threadedChannelizer);
|
|
m_deviceAPI->addChannelAPI(this);
|
|
|
|
applySettings(m_settings, true);
|
|
}
|
|
|
|
NFMMod::~NFMMod()
|
|
{
|
|
DSPEngine::instance()->removeAudioSource(&m_audioFifo);
|
|
m_deviceAPI->removeChannelAPI(this);
|
|
m_deviceAPI->removeThreadedSource(m_threadedChannelizer);
|
|
delete m_threadedChannelizer;
|
|
delete m_channelizer;
|
|
}
|
|
|
|
void NFMMod::pull(Sample& sample)
|
|
{
|
|
if (m_settings.m_channelMute)
|
|
{
|
|
sample.m_real = 0.0f;
|
|
sample.m_imag = 0.0f;
|
|
return;
|
|
}
|
|
|
|
Complex ci;
|
|
|
|
m_settingsMutex.lock();
|
|
|
|
if (m_interpolatorDistance > 1.0f) // decimate
|
|
{
|
|
modulateSample();
|
|
|
|
while (!m_interpolator.decimate(&m_interpolatorDistanceRemain, m_modSample, &ci))
|
|
{
|
|
modulateSample();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (m_interpolator.interpolate(&m_interpolatorDistanceRemain, m_modSample, &ci))
|
|
{
|
|
modulateSample();
|
|
}
|
|
}
|
|
|
|
m_interpolatorDistanceRemain += m_interpolatorDistance;
|
|
|
|
ci *= m_carrierNco.nextIQ(); // shift to carrier frequency
|
|
|
|
m_settingsMutex.unlock();
|
|
|
|
Real magsq = ci.real() * ci.real() + ci.imag() * ci.imag();
|
|
magsq /= (1<<30);
|
|
m_movingAverage.feed(magsq);
|
|
m_magsq = m_movingAverage.average();
|
|
|
|
sample.m_real = (FixReal) ci.real();
|
|
sample.m_imag = (FixReal) ci.imag();
|
|
}
|
|
|
|
void NFMMod::pullAudio(int nbSamples)
|
|
{
|
|
unsigned int nbSamplesAudio = nbSamples * ((Real) m_settings.m_audioSampleRate / (Real) m_settings.m_basebandSampleRate);
|
|
|
|
if (nbSamplesAudio > m_audioBuffer.size())
|
|
{
|
|
m_audioBuffer.resize(nbSamplesAudio);
|
|
}
|
|
|
|
m_audioFifo.read(reinterpret_cast<quint8*>(&m_audioBuffer[0]), nbSamplesAudio, 10);
|
|
m_audioBufferFill = 0;
|
|
}
|
|
|
|
void NFMMod::modulateSample()
|
|
{
|
|
Real t;
|
|
|
|
pullAF(t);
|
|
calculateLevel(t);
|
|
m_audioBufferFill++;
|
|
|
|
if (m_settings.m_ctcssOn)
|
|
{
|
|
m_modPhasor += (m_settings.m_fmDeviation / (float) m_settings.m_audioSampleRate) * (0.85f * m_bandpass.filter(t) + 0.15f * 378.0f * m_ctcssNco.next()) * (M_PI / 378.0f);
|
|
}
|
|
else
|
|
{
|
|
// 378 = 302 * 1.25; 302 = number of filter taps (established experimentally)
|
|
m_modPhasor += (m_settings.m_fmDeviation / (float) m_settings.m_audioSampleRate) * m_bandpass.filter(t) * (M_PI / 378.0f);
|
|
}
|
|
|
|
m_modSample.real(cos(m_modPhasor) * 29204.0f); // -1 dB
|
|
m_modSample.imag(sin(m_modPhasor) * 29204.0f);
|
|
}
|
|
|
|
void NFMMod::pullAF(Real& sample)
|
|
{
|
|
switch (m_afInput)
|
|
{
|
|
case NFMModInputTone:
|
|
sample = m_toneNco.next();
|
|
break;
|
|
case NFMModInputFile:
|
|
// sox f4exb_call.wav --encoding float --endian little f4exb_call.raw
|
|
// ffplay -f f32le -ar 48k -ac 1 f4exb_call.raw
|
|
if (m_ifstream.is_open())
|
|
{
|
|
if (m_ifstream.eof())
|
|
{
|
|
if (m_settings.m_playLoop)
|
|
{
|
|
m_ifstream.clear();
|
|
m_ifstream.seekg(0, std::ios::beg);
|
|
}
|
|
}
|
|
|
|
if (m_ifstream.eof())
|
|
{
|
|
sample = 0.0f;
|
|
}
|
|
else
|
|
{
|
|
m_ifstream.read(reinterpret_cast<char*>(&sample), sizeof(Real));
|
|
sample *= m_settings.m_volumeFactor;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sample = 0.0f;
|
|
}
|
|
break;
|
|
case NFMModInputAudio:
|
|
sample = ((m_audioBuffer[m_audioBufferFill].l + m_audioBuffer[m_audioBufferFill].r) / 65536.0f) * m_settings.m_volumeFactor;
|
|
break;
|
|
case NFMModInputCWTone:
|
|
Real fadeFactor;
|
|
|
|
if (m_cwKeyer.getSample())
|
|
{
|
|
m_cwKeyer.getCWSmoother().getFadeSample(true, fadeFactor);
|
|
sample = m_toneNco.next() * fadeFactor;
|
|
}
|
|
else
|
|
{
|
|
if (m_cwKeyer.getCWSmoother().getFadeSample(false, fadeFactor))
|
|
{
|
|
sample = m_toneNco.next() * fadeFactor;
|
|
}
|
|
else
|
|
{
|
|
sample = 0.0f;
|
|
m_toneNco.setPhase(0);
|
|
}
|
|
}
|
|
break;
|
|
case NFMModInputNone:
|
|
default:
|
|
sample = 0.0f;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void NFMMod::calculateLevel(Real& sample)
|
|
{
|
|
if (m_levelCalcCount < m_levelNbSamples)
|
|
{
|
|
m_peakLevel = std::max(std::fabs(m_peakLevel), sample);
|
|
m_levelSum += sample * sample;
|
|
m_levelCalcCount++;
|
|
}
|
|
else
|
|
{
|
|
qreal rmsLevel = sqrt(m_levelSum / m_levelNbSamples);
|
|
//qDebug("NFMMod::calculateLevel: %f %f", rmsLevel, m_peakLevel);
|
|
emit levelChanged(rmsLevel, m_peakLevel, m_levelNbSamples);
|
|
m_peakLevel = 0.0f;
|
|
m_levelSum = 0.0f;
|
|
m_levelCalcCount = 0;
|
|
}
|
|
}
|
|
|
|
void NFMMod::start()
|
|
{
|
|
qDebug() << "NFMMod::start: m_outputSampleRate: " << m_settings.m_outputSampleRate
|
|
<< " m_inputFrequencyOffset: " << m_settings.m_inputFrequencyOffset;
|
|
|
|
m_audioFifo.clear();
|
|
}
|
|
|
|
void NFMMod::stop()
|
|
{
|
|
}
|
|
|
|
bool NFMMod::handleMessage(const Message& cmd)
|
|
{
|
|
if (UpChannelizer::MsgChannelizerNotification::match(cmd))
|
|
{
|
|
UpChannelizer::MsgChannelizerNotification& notif = (UpChannelizer::MsgChannelizerNotification&) cmd;
|
|
|
|
NFMModSettings settings = m_settings;
|
|
|
|
settings.m_basebandSampleRate = notif.getBasebandSampleRate();
|
|
settings.m_outputSampleRate = notif.getSampleRate();
|
|
settings.m_inputFrequencyOffset = notif.getFrequencyOffset();
|
|
|
|
applySettings(settings);
|
|
|
|
qDebug() << "NFMMod::handleMessage: MsgChannelizerNotification:"
|
|
<< " m_basebandSampleRate: " << settings.m_basebandSampleRate
|
|
<< " m_outputSampleRate: " << settings.m_outputSampleRate
|
|
<< " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset;
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureChannelizer::match(cmd))
|
|
{
|
|
MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
|
|
|
|
m_channelizer->configure(m_channelizer->getInputMessageQueue(),
|
|
cfg.getSampleRate(),
|
|
cfg.getCenterFrequency());
|
|
|
|
qDebug() << "NFMMod::handleMessage: MsgConfigureChannelizer:"
|
|
<< " getSampleRate: " << cfg.getSampleRate()
|
|
<< " getCenterFrequency: " << cfg.getCenterFrequency();
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureNFMMod::match(cmd))
|
|
{
|
|
MsgConfigureNFMMod& cfg = (MsgConfigureNFMMod&) cmd;
|
|
|
|
NFMModSettings settings = cfg.getSettings();
|
|
|
|
m_absoluteFrequencyOffset = settings.m_inputFrequencyOffset;
|
|
settings.m_outputSampleRate = m_settings.m_outputSampleRate;
|
|
settings.m_inputFrequencyOffset = m_settings.m_inputFrequencyOffset;
|
|
|
|
qDebug() << "NFMMod::handleMessage: MsgConfigureNFMMod:"
|
|
<< " m_rfBandwidth: " << settings.m_rfBandwidth
|
|
<< " m_afBandwidth: " << settings.m_afBandwidth
|
|
<< " m_fmDeviation: " << settings.m_fmDeviation
|
|
<< " m_volumeFactor: " << settings.m_volumeFactor
|
|
<< " m_toneFrequency: " << settings.m_toneFrequency
|
|
<< " m_ctcssIndex: " << settings.m_ctcssIndex
|
|
<< " m_ctcssOn: " << settings.m_ctcssOn
|
|
<< " m_channelMute: " << settings.m_channelMute
|
|
<< " m_playLoop: " << settings.m_playLoop
|
|
<< " force: " << cfg.getForce();
|
|
|
|
applySettings(settings, cfg.getForce());
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureFileSourceName::match(cmd))
|
|
{
|
|
MsgConfigureFileSourceName& conf = (MsgConfigureFileSourceName&) cmd;
|
|
m_fileName = conf.getFileName();
|
|
openFileStream();
|
|
return true;
|
|
}
|
|
else if (MsgConfigureFileSourceSeek::match(cmd))
|
|
{
|
|
MsgConfigureFileSourceSeek& conf = (MsgConfigureFileSourceSeek&) cmd;
|
|
int seekPercentage = conf.getPercentage();
|
|
seekFileStream(seekPercentage);
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureAFInput::match(cmd))
|
|
{
|
|
MsgConfigureAFInput& conf = (MsgConfigureAFInput&) cmd;
|
|
m_afInput = conf.getAFInput();
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureFileSourceStreamTiming::match(cmd))
|
|
{
|
|
std::size_t samplesCount;
|
|
|
|
if (m_ifstream.eof()) {
|
|
samplesCount = m_fileSize / sizeof(Real);
|
|
} else {
|
|
samplesCount = m_ifstream.tellg() / sizeof(Real);
|
|
}
|
|
|
|
MsgReportFileSourceStreamTiming *report;
|
|
report = MsgReportFileSourceStreamTiming::create(samplesCount);
|
|
getMessageQueueToGUI()->push(report);
|
|
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void NFMMod::openFileStream()
|
|
{
|
|
if (m_ifstream.is_open()) {
|
|
m_ifstream.close();
|
|
}
|
|
|
|
m_ifstream.open(m_fileName.toStdString().c_str(), std::ios::binary | std::ios::ate);
|
|
m_fileSize = m_ifstream.tellg();
|
|
m_ifstream.seekg(0,std::ios_base::beg);
|
|
|
|
m_sampleRate = 48000; // fixed rate
|
|
m_recordLength = m_fileSize / (sizeof(Real) * m_sampleRate);
|
|
|
|
qDebug() << "NFMMod::openFileStream: " << m_fileName.toStdString().c_str()
|
|
<< " fileSize: " << m_fileSize << "bytes"
|
|
<< " length: " << m_recordLength << " seconds";
|
|
|
|
MsgReportFileSourceStreamData *report;
|
|
report = MsgReportFileSourceStreamData::create(m_sampleRate, m_recordLength);
|
|
getMessageQueueToGUI()->push(report);
|
|
}
|
|
|
|
void NFMMod::seekFileStream(int seekPercentage)
|
|
{
|
|
QMutexLocker mutexLocker(&m_settingsMutex);
|
|
|
|
if (m_ifstream.is_open())
|
|
{
|
|
int seekPoint = ((m_recordLength * seekPercentage) / 100) * m_sampleRate;
|
|
seekPoint *= sizeof(Real);
|
|
m_ifstream.clear();
|
|
m_ifstream.seekg(seekPoint, std::ios::beg);
|
|
}
|
|
}
|
|
|
|
void NFMMod::applySettings(const NFMModSettings& settings, bool force)
|
|
{
|
|
if ((settings.m_inputFrequencyOffset != m_settings.m_inputFrequencyOffset) ||
|
|
(settings.m_outputSampleRate != m_settings.m_outputSampleRate) || force)
|
|
{
|
|
m_settingsMutex.lock();
|
|
m_carrierNco.setFreq(settings.m_inputFrequencyOffset, settings.m_outputSampleRate);
|
|
m_settingsMutex.unlock();
|
|
}
|
|
|
|
if((settings.m_outputSampleRate != m_settings.m_outputSampleRate) ||
|
|
(settings.m_rfBandwidth != m_settings.m_rfBandwidth) ||
|
|
(settings.m_audioSampleRate != m_settings.m_audioSampleRate) || force)
|
|
{
|
|
m_settingsMutex.lock();
|
|
m_interpolatorDistanceRemain = 0;
|
|
m_interpolatorConsumed = false;
|
|
m_interpolatorDistance = (Real) settings.m_audioSampleRate / (Real) settings.m_outputSampleRate;
|
|
m_interpolator.create(48, settings.m_audioSampleRate, settings.m_rfBandwidth / 2.2, 3.0);
|
|
m_settingsMutex.unlock();
|
|
}
|
|
|
|
if ((settings.m_afBandwidth != m_settings.m_afBandwidth) ||
|
|
(settings.m_audioSampleRate != m_settings.m_audioSampleRate) || force)
|
|
{
|
|
m_settingsMutex.lock();
|
|
m_lowpass.create(301, settings.m_audioSampleRate, 250.0);
|
|
m_bandpass.create(301, settings.m_audioSampleRate, 300.0, settings.m_afBandwidth);
|
|
m_settingsMutex.unlock();
|
|
}
|
|
|
|
if ((settings.m_toneFrequency != m_settings.m_toneFrequency) ||
|
|
(settings.m_audioSampleRate != m_settings.m_audioSampleRate) || force)
|
|
{
|
|
m_settingsMutex.lock();
|
|
m_toneNco.setFreq(settings.m_toneFrequency, settings.m_audioSampleRate);
|
|
m_settingsMutex.unlock();
|
|
}
|
|
|
|
if ((settings.m_audioSampleRate != m_settings.m_audioSampleRate) || force)
|
|
{
|
|
m_cwKeyer.setSampleRate(settings.m_audioSampleRate);
|
|
}
|
|
|
|
if ((settings.m_ctcssIndex != m_settings.m_ctcssIndex) ||
|
|
(settings.m_audioSampleRate != m_settings.m_audioSampleRate) || force)
|
|
{
|
|
m_settingsMutex.lock();
|
|
m_ctcssNco.setFreq(NFMModSettings::getCTCSSFreq(settings.m_ctcssIndex), settings.m_audioSampleRate);
|
|
m_settingsMutex.unlock();
|
|
}
|
|
|
|
m_settings = settings;
|
|
}
|
|
|