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sdrangel/plugins/channeltx/modam/ammod.cpp

462 wiersze
14 KiB
C++
Czysty Wina Historia

///////////////////////////////////////////////////////////////////////////////////
// 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 "ammod.h"
#include <QTime>
#include <QDebug>
#include <QMutexLocker>
#include <stdio.h>
#include <complex.h>
#include <dsp/upchannelizer.h>
#include "dsp/dspengine.h"
#include "dsp/pidcontroller.h"
#include "dsp/threadedbasebandsamplesource.h"
#include "device/devicesinkapi.h"
MESSAGE_CLASS_DEFINITION(AMMod::MsgConfigureAMMod, Message)
MESSAGE_CLASS_DEFINITION(AMMod::MsgConfigureChannelizer, Message)
MESSAGE_CLASS_DEFINITION(AMMod::MsgConfigureFileSourceName, Message)
MESSAGE_CLASS_DEFINITION(AMMod::MsgConfigureFileSourceSeek, Message)
MESSAGE_CLASS_DEFINITION(AMMod::MsgConfigureAFInput, Message)
MESSAGE_CLASS_DEFINITION(AMMod::MsgConfigureFileSourceStreamTiming, Message)
MESSAGE_CLASS_DEFINITION(AMMod::MsgReportFileSourceStreamData, Message)
MESSAGE_CLASS_DEFINITION(AMMod::MsgReportFileSourceStreamTiming, Message)
const QString AMMod::m_channelIdURI = "sdrangel.channeltx.modam";
const QString AMMod::m_channelId ="AMMod";
const int AMMod::m_levelNbSamples = 480; // every 10ms
AMMod::AMMod(DeviceSinkAPI *deviceAPI) :
ChannelSourceAPI(m_channelIdURI),
m_deviceAPI(deviceAPI),
m_absoluteFrequencyOffset(0),
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(AMModInputNone),
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);
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);
}
AMMod::~AMMod()
{
m_deviceAPI->removeChannelAPI(this);
m_deviceAPI->removeThreadedSource(m_threadedChannelizer);
delete m_threadedChannelizer;
delete m_channelizer;
DSPEngine::instance()->removeAudioSource(&m_audioFifo);
}
void AMMod::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 AMMod::pullAudio(int nbSamples)
{
// qDebug("AMMod::pullAudio: %d", nbSamples);
unsigned int nbAudioSamples = nbSamples * ((Real) m_settings.m_audioSampleRate / (Real) m_settings.m_basebandSampleRate);
if (nbAudioSamples > m_audioBuffer.size())
{
m_audioBuffer.resize(nbAudioSamples);
}
m_audioFifo.read(reinterpret_cast<quint8*>(&m_audioBuffer[0]), nbAudioSamples, 10);
m_audioBufferFill = 0;
}
void AMMod::modulateSample()
{
Real t;
pullAF(t);
calculateLevel(t);
m_audioBufferFill++;
m_modSample.real((t*m_settings.m_modFactor + 1.0f) * 16384.0f); // modulate and scale zero frequency carrier
m_modSample.imag(0.0f);
}
void AMMod::pullAF(Real& sample)
{
switch (m_afInput)
{
case AMModInputTone:
sample = m_toneNco.next();
break;
case AMModInputFile:
// 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 AMModInputAudio:
sample = ((m_audioBuffer[m_audioBufferFill].l + m_audioBuffer[m_audioBufferFill].r) / 65536.0f) * m_settings.m_volumeFactor;
break;
case AMModInputCWTone:
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 AMModInputNone:
default:
sample = 0.0f;
break;
}
}
void AMMod::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 AMMod::start()
{
qDebug() << "AMMod::start: m_outputSampleRate: " << m_settings.m_outputSampleRate
<< " m_inputFrequencyOffset: " << m_settings.m_inputFrequencyOffset;
m_audioFifo.clear();
}
void AMMod::stop()
{
}
bool AMMod::handleMessage(const Message& cmd)
{
if (UpChannelizer::MsgChannelizerNotification::match(cmd))
{
UpChannelizer::MsgChannelizerNotification& notif = (UpChannelizer::MsgChannelizerNotification&) cmd;
AMModSettings settings = m_settings;
settings.m_basebandSampleRate = notif.getBasebandSampleRate();
settings.m_outputSampleRate = notif.getSampleRate();
settings.m_inputFrequencyOffset = notif.getFrequencyOffset();
applySettings(settings);
qDebug() << "AMMod::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() << "AMMod::handleMessage: MsgConfigureChannelizer:"
<< " getSampleRate: " << cfg.getSampleRate()
<< " getCenterFrequency: " << cfg.getCenterFrequency();
return true;
}
else if (MsgConfigureAMMod::match(cmd))
{
MsgConfigureAMMod& cfg = (MsgConfigureAMMod&) cmd;
AMModSettings settings = cfg.getSettings();
// These settings are set with DownChannelizer::MsgChannelizerNotification
m_absoluteFrequencyOffset = settings.m_inputFrequencyOffset;
settings.m_basebandSampleRate = m_settings.m_basebandSampleRate;
settings.m_outputSampleRate = m_settings.m_outputSampleRate;
settings.m_inputFrequencyOffset = m_settings.m_inputFrequencyOffset;
applySettings(settings, cfg.getForce());
qDebug() << "AMMod::handleMessage: MsgConfigureAMMod:"
<< " m_basebandSampleRate: " << settings.m_basebandSampleRate
<< " m_outputSampleRate: " << settings.m_outputSampleRate
<< " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset
<< " m_rfBandwidth: " << settings.m_rfBandwidth
<< " m_modFactor: " << settings.m_modFactor
<< " m_toneFrequency: " << settings.m_toneFrequency
<< " m_volumeFactor: " << settings.m_volumeFactor
<< " m_audioMute: " << settings.m_channelMute
<< " m_playLoop: " << settings.m_playLoop;
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 AMMod::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() << "AMMod::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 AMMod::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 AMMod::applySettings(const AMModSettings& 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_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);
}
m_settings = settings;
}
QByteArray AMMod::serialize() const
{
return m_settings.serialize();
}
bool AMMod::deserialize(const QByteArray& data)
{
if (m_settings.deserialize(data))
{
MsgConfigureAMMod *msg = MsgConfigureAMMod::create(m_settings, true);
m_inputMessageQueue.push(msg);
return true;
}
else
{
m_settings.resetToDefaults();
MsgConfigureAMMod *msg = MsgConfigureAMMod::create(m_settings, true);
m_inputMessageQueue.push(msg);
return false;
}
}
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