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sdrangel/plugins/channeltx/modnfm/nfmmod.cpp

642 lines
22 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 "SWGChannelSettings.h"
#include "SWGCWKeyerSettings.h"
#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::MsgConfigureFileSourceStreamTiming, Message)
MESSAGE_CLASS_DEFINITION(NFMMod::MsgReportFileSourceStreamData, Message)
MESSAGE_CLASS_DEFINITION(NFMMod::MsgReportFileSourceStreamTiming, Message)
const QString NFMMod::m_channelIdURI = "sdrangel.channeltx.modnfm";
const QString NFMMod::m_channelId = "NFMMod";
const int NFMMod::m_levelNbSamples = 480; // every 10ms
NFMMod::NFMMod(DeviceSinkAPI *deviceAPI) :
ChannelSourceAPI(m_channelIdURI),
m_deviceAPI(deviceAPI),
m_basebandSampleRate(48000),
m_outputSampleRate(48000),
m_inputFrequencyOffset(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_levelCalcCount(0),
m_peakLevel(0.0f),
m_levelSum(0.0f)
{
setObjectName(m_channelId);
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(CWKeyerSettings::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_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_settings.m_modAFInput)
{
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_outputSampleRate
<< " m_inputFrequencyOffset: " << 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;
qDebug() << "NFMMod::handleMessage: UpChannelizer::MsgChannelizerNotification";
applyChannelSettings(notif.getBasebandSampleRate(), notif.getSampleRate(), notif.getFrequencyOffset());
return true;
}
else if (MsgConfigureChannelizer::match(cmd))
{
MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
qDebug() << "NFMMod::handleMessage: MsgConfigureChannelizer:"
<< " getSampleRate: " << cfg.getSampleRate()
<< " getCenterFrequency: " << cfg.getCenterFrequency();
m_channelizer->configure(m_channelizer->getInputMessageQueue(),
cfg.getSampleRate(),
cfg.getCenterFrequency());
return true;
}
else if (MsgConfigureNFMMod::match(cmd))
{
MsgConfigureNFMMod& cfg = (MsgConfigureNFMMod&) cmd;
qDebug() << "NFMMod::handleMessage: MsgConfigureNFMMod";
applySettings(cfg.getSettings(), cfg.getForce());
return true;
}
else if (MsgConfigureFileSourceName::match(cmd))
{
MsgConfigureFileSourceName& conf = (MsgConfigureFileSourceName&) cmd;
m_fileName = conf.getFileName();
openFileStream();
qDebug() << "NFMMod::handleMessage: MsgConfigureFileSourceName:"
<< " m_fileName: " << m_fileName;
return true;
}
else if (MsgConfigureFileSourceSeek::match(cmd))
{
MsgConfigureFileSourceSeek& conf = (MsgConfigureFileSourceSeek&) cmd;
int seekPercentage = conf.getPercentage();
seekFileStream(seekPercentage);
qDebug() << "NFMMod::handleMessage: MsgConfigureFileSourceSeek:"
<< " seekPercentage: " << seekPercentage;
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::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset)
{
qDebug() << "NFMMod::applyChannelSettings:"
<< " basebandSampleRate: " << basebandSampleRate
<< " outputSampleRate: " << outputSampleRate
<< " inputFrequencyOffset: " << inputFrequencyOffset;
if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
(outputSampleRate != m_outputSampleRate))
{
m_settingsMutex.lock();
m_carrierNco.setFreq(inputFrequencyOffset, m_outputSampleRate);
m_settingsMutex.unlock();
}
if (outputSampleRate != m_outputSampleRate)
{
m_settingsMutex.lock();
m_interpolatorDistanceRemain = 0;
m_interpolatorConsumed = false;
m_interpolatorDistance = (Real) m_settings.m_audioSampleRate / (Real) outputSampleRate;
m_interpolator.create(48, m_settings.m_audioSampleRate, m_settings.m_rfBandwidth / 2.2, 3.0);
m_settingsMutex.unlock();
}
m_basebandSampleRate = basebandSampleRate;
m_outputSampleRate = outputSampleRate;
m_inputFrequencyOffset = inputFrequencyOffset;
}
void NFMMod::applySettings(const NFMModSettings& settings, bool force)
{
qDebug() << "NFMMod::applySettings:"
<< " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset
<< " 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
<< " m_modAFInout " << settings.m_modAFInput
<< " force: " << force;
if((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) 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;
}
QByteArray NFMMod::serialize() const
{
return m_settings.serialize();
}
bool NFMMod::deserialize(const QByteArray& data)
{
bool success = true;
if (!m_settings.deserialize(data))
{
m_settings.resetToDefaults();
success = false;
}
MsgConfigureChannelizer *msgChan = MsgConfigureChannelizer::create(
48000, m_settings.m_inputFrequencyOffset);
m_inputMessageQueue.push(msgChan);
MsgConfigureNFMMod *msg = MsgConfigureNFMMod::create(m_settings, true);
m_inputMessageQueue.push(msg);
return success;
}
int NFMMod::webapiSettingsGet(
SWGSDRangel::SWGChannelSettings& response,
QString& errorMessage __attribute__((unused)))
{
response.setNfmModSettings(new SWGSDRangel::SWGNFMModSettings());
response.getNfmModSettings()->setAfBandwidth(m_settings.m_afBandwidth);
response.getNfmModSettings()->setAudioSampleRate(m_settings.m_audioSampleRate);
response.getNfmModSettings()->setChannelMute(m_settings.m_channelMute ? 1 : 0);
response.getNfmModSettings()->setCtcssIndex(m_settings.m_ctcssIndex);
response.getNfmModSettings()->setCtcssOn(m_settings.m_ctcssOn ? 1 : 0);
response.getNfmModSettings()->setFmDeviation(m_settings.m_fmDeviation);
response.getNfmModSettings()->setInputFrequencyOffset(m_settings.m_inputFrequencyOffset);
response.getNfmModSettings()->setModAfInput((int) m_settings.m_modAFInput);
response.getNfmModSettings()->setPlayLoop(m_settings.m_playLoop ? 1 : 0);
response.getNfmModSettings()->setRfBandwidth(m_settings.m_rfBandwidth);
response.getNfmModSettings()->setRgbColor(m_settings.m_rgbColor);
*response.getNfmModSettings()->getTitle() = m_settings.m_title;
response.getNfmModSettings()->setToneFrequency(m_settings.m_toneFrequency);
response.getNfmModSettings()->setVolumeFactor(m_settings.m_volumeFactor);
SWGSDRangel::SWGCWKeyerSettings *apiCwKeyerSettings = response.getNfmModSettings()->getCwKeyer();
const CWKeyerSettings& cwKeyerSettings = m_cwKeyer.getSettings();
apiCwKeyerSettings->setLoop(cwKeyerSettings.m_loop ? 1 : 0);
apiCwKeyerSettings->setMode((int) cwKeyerSettings.m_mode);
apiCwKeyerSettings->setSampleRate(cwKeyerSettings.m_sampleRate);
apiCwKeyerSettings->setText(new QString(cwKeyerSettings.m_text));
apiCwKeyerSettings->setWpm(cwKeyerSettings.m_wpm);
return 200;
}
int NFMMod::webapiSettingsPutPatch(
bool force,
const QStringList& channelSettingsKeys,
SWGSDRangel::SWGChannelSettings& response,
QString& errorMessage __attribute__((unused)))
{
NFMModSettings settings;
bool frequencyOffsetChanged = false;
// for (int i = 0; i < channelSettingsKeys.size(); i++) {
// qDebug("NFMMod::webapiSettingsPutPatch: settingKey: %s", qPrintable(channelSettingsKeys.at(i)));
// }
if (channelSettingsKeys.contains("afBandwidth")) {
settings.m_afBandwidth = response.getNfmModSettings()->getAfBandwidth();
}
if (channelSettingsKeys.contains("audioSampleRate")) {
settings.m_audioSampleRate = response.getNfmModSettings()->getAudioSampleRate();
}
if (channelSettingsKeys.contains("channelMute")) {
settings.m_channelMute = response.getNfmModSettings()->getChannelMute() != 0;
}
if (channelSettingsKeys.contains("ctcssIndex")) {
settings.m_ctcssIndex = response.getNfmModSettings()->getCtcssIndex();
}
if (channelSettingsKeys.contains("ctcssOn")) {
settings.m_ctcssOn = response.getNfmModSettings()->getCtcssOn() != 0;
}
if (channelSettingsKeys.contains("fmDeviation")) {
settings.m_fmDeviation = response.getNfmModSettings()->getFmDeviation();
}
if (channelSettingsKeys.contains("inputFrequencyOffset"))
{
settings.m_inputFrequencyOffset = response.getNfmModSettings()->getInputFrequencyOffset();
frequencyOffsetChanged = true;
}
if (channelSettingsKeys.contains("modAFInput")) {
settings.m_modAFInput = (NFMModSettings::NFMModInputAF) response.getNfmModSettings()->getModAfInput();
}
if (channelSettingsKeys.contains("playLoop")) {
settings.m_playLoop = response.getNfmModSettings()->getPlayLoop() != 0;
}
if (channelSettingsKeys.contains("rfBandwidth")) {
settings.m_rfBandwidth = response.getNfmModSettings()->getRfBandwidth();
}
if (channelSettingsKeys.contains("rgbColor")) {
settings.m_rgbColor = response.getNfmModSettings()->getRgbColor();
}
if (channelSettingsKeys.contains("title")) {
settings.m_title = *response.getNfmModSettings()->getTitle();
}
if (channelSettingsKeys.contains("toneFrequency")) {
settings.m_toneFrequency = response.getNfmModSettings()->getToneFrequency();
}
if (channelSettingsKeys.contains("volumeFactor")) {
settings.m_volumeFactor = response.getNfmModSettings()->getVolumeFactor();
}
if (channelSettingsKeys.contains("cwKeyer"))
{
SWGSDRangel::SWGCWKeyerSettings *apiCwKeyerSettings = response.getNfmModSettings()->getCwKeyer();
CWKeyerSettings cwKeyerSettings = m_cwKeyer.getSettings();
if (channelSettingsKeys.contains("cwKeyer.loop")) {
cwKeyerSettings.m_loop = apiCwKeyerSettings->getLoop() != 0;
}
if (channelSettingsKeys.contains("cwKeyer.mode")) {
cwKeyerSettings.m_mode = (CWKeyerSettings::CWMode) apiCwKeyerSettings->getMode();
}
if (channelSettingsKeys.contains("cwKeyer.text")) {
cwKeyerSettings.m_text = *apiCwKeyerSettings->getText();
}
if (channelSettingsKeys.contains("cwKeyer.sampleRate")) {
cwKeyerSettings.m_sampleRate = apiCwKeyerSettings->getSampleRate();
}
if (channelSettingsKeys.contains("cwKeyer.wpm")) {
cwKeyerSettings.m_wpm = apiCwKeyerSettings->getWpm();
}
m_cwKeyer.setLoop(cwKeyerSettings.m_loop);
m_cwKeyer.setMode(cwKeyerSettings.m_mode);
m_cwKeyer.setSampleRate(cwKeyerSettings.m_sampleRate);
m_cwKeyer.setText(cwKeyerSettings.m_text);
m_cwKeyer.setWPM(cwKeyerSettings.m_wpm);
if (m_guiMessageQueue) // forward to GUI if any
{
CWKeyer::MsgConfigureCWKeyer *msgCwKeyer = CWKeyer::MsgConfigureCWKeyer::create(cwKeyerSettings, force);
m_guiMessageQueue->push(msgCwKeyer);
}
}
if (frequencyOffsetChanged)
{
NFMMod::MsgConfigureChannelizer *msgChan = NFMMod::MsgConfigureChannelizer::create(
48000, settings.m_inputFrequencyOffset);
m_inputMessageQueue.push(msgChan);
}
MsgConfigureNFMMod *msg = MsgConfigureNFMMod::create(settings, force);
m_inputMessageQueue.push(msg);
if (m_guiMessageQueue) // forward to GUI if any
{
MsgConfigureNFMMod *msgToGUI = MsgConfigureNFMMod::create(settings, force);
m_guiMessageQueue->push(msgToGUI);
}
return 200;
}