mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-26 17:58:43 -05:00
272 lines
10 KiB
C++
272 lines
10 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// 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/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <stdio.h>
|
|
#include <complex.h>
|
|
|
|
#include <QTime>
|
|
#include <QDebug>
|
|
|
|
#include "audio/audiooutputdevice.h"
|
|
#include "dsp/dspengine.h"
|
|
#include "dsp/dspcommands.h"
|
|
#include "dsp/devicesamplemimo.h"
|
|
#include "dsp/datafifo.h"
|
|
#include "util/db.h"
|
|
#include "util/messagequeue.h"
|
|
#include "maincore.h"
|
|
|
|
#include "wfmdemodsink.h"
|
|
|
|
const unsigned int WFMDemodSink::m_rfFilterFftLength = 1024;
|
|
|
|
WFMDemodSink::WFMDemodSink() :
|
|
m_channelSampleRate(384000),
|
|
m_channelFrequencyOffset(0),
|
|
m_audioSampleRate(48000),
|
|
m_squelchState(0),
|
|
m_squelchOpen(false),
|
|
m_magsq(0.0f),
|
|
m_magsqSum(0.0f),
|
|
m_magsqPeak(0.0f),
|
|
m_magsqCount(0),
|
|
m_audioFifo(250000)
|
|
{
|
|
m_rfFilter = new fftfilt(-50000.0 / 384000.0, 50000.0 / 384000.0, m_rfFilterFftLength);
|
|
m_phaseDiscri.setFMScaling(384000/75000);
|
|
|
|
m_audioBuffer.resize(1<<14);
|
|
m_audioBufferFill = 0;
|
|
|
|
m_demodBuffer.resize(1<<12);
|
|
m_demodBufferFill = 0;
|
|
|
|
applySettings(m_settings, true);
|
|
applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, true);
|
|
}
|
|
|
|
WFMDemodSink::~WFMDemodSink()
|
|
{
|
|
delete m_rfFilter;
|
|
}
|
|
|
|
void WFMDemodSink::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end)
|
|
{
|
|
Complex ci;
|
|
fftfilt::cmplx *rf;
|
|
int rf_out;
|
|
Real demod;
|
|
double msq;
|
|
float fmDev;
|
|
|
|
for (SampleVector::const_iterator it = begin; it != end; ++it)
|
|
{
|
|
Complex c(it->real(), it->imag());
|
|
c *= m_nco.nextIQ();
|
|
|
|
rf_out = m_rfFilter->runFilt(c, &rf); // filter RF before demod
|
|
|
|
for (int i = 0 ; i < rf_out; i++)
|
|
{
|
|
msq = rf[i].real()*rf[i].real() + rf[i].imag()*rf[i].imag();
|
|
Real magsq = msq / (SDR_RX_SCALED*SDR_RX_SCALED);
|
|
m_magsqSum += magsq;
|
|
m_movingAverage(magsq);
|
|
|
|
if (magsq > m_magsqPeak) {
|
|
m_magsqPeak = magsq;
|
|
}
|
|
|
|
m_magsqCount++;
|
|
|
|
if (magsq >= m_squelchLevel)
|
|
{
|
|
if (m_squelchState < m_settings.m_rfBandwidth / 10) { // twice attack and decay rate
|
|
m_squelchState++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (m_squelchState > 0) {
|
|
m_squelchState--;
|
|
}
|
|
}
|
|
|
|
m_squelchOpen = (m_squelchState > (m_settings.m_rfBandwidth / 20));
|
|
|
|
if (m_squelchOpen && !m_settings.m_audioMute) { // squelch open and not mute
|
|
demod = m_phaseDiscri.phaseDiscriminatorDelta(rf[i], msq, fmDev);
|
|
} else {
|
|
demod = 0;
|
|
}
|
|
|
|
Complex e(demod, 0);
|
|
|
|
if (m_interpolator.decimate(&m_interpolatorDistanceRemain, e, &ci))
|
|
{
|
|
qint16 sample = (qint16)(ci.real() * 3276.8f * m_settings.m_volume);
|
|
m_audioBuffer[m_audioBufferFill].l = sample;
|
|
m_audioBuffer[m_audioBufferFill].r = sample;
|
|
|
|
++m_audioBufferFill;
|
|
|
|
if(m_audioBufferFill >= m_audioBuffer.size())
|
|
{
|
|
std::size_t res = m_audioFifo.write((const quint8*)&m_audioBuffer[0], std::min(m_audioBufferFill, m_audioBuffer.size()));
|
|
|
|
if (res != m_audioBufferFill) {
|
|
qDebug("WFMDemodSink::feed: %lu/%lu audio samples written", res, m_audioBufferFill);
|
|
}
|
|
|
|
m_audioBufferFill = 0;
|
|
}
|
|
|
|
m_interpolatorDistanceRemain += m_interpolatorDistance;
|
|
m_demodBuffer[m_demodBufferFill] = sample;
|
|
++m_demodBufferFill;
|
|
|
|
if (m_demodBufferFill >= m_demodBuffer.size())
|
|
{
|
|
QList<ObjectPipe*> dataPipes;
|
|
MainCore::instance()->getDataPipes().getDataPipes(m_channel, "demod", dataPipes);
|
|
|
|
if (dataPipes.size() > 0)
|
|
{
|
|
QList<ObjectPipe*>::iterator it = dataPipes.begin();
|
|
|
|
for (; it != dataPipes.end(); ++it)
|
|
{
|
|
DataFifo *fifo = qobject_cast<DataFifo*>((*it)->m_element);
|
|
|
|
if (fifo) {
|
|
fifo->write((quint8*) &m_demodBuffer[0], m_demodBuffer.size() * sizeof(qint16), DataFifo::DataTypeI16);
|
|
}
|
|
}
|
|
}
|
|
|
|
m_demodBufferFill = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void WFMDemodSink::applyAudioSampleRate(int sampleRate)
|
|
{
|
|
if (sampleRate < 0)
|
|
{
|
|
qWarning("WFMDemodSink::applyAudioSampleRate: invalid sample rate: %d", sampleRate);
|
|
return;
|
|
}
|
|
|
|
qDebug("WFMDemodSink::applyAudioSampleRate: %u", sampleRate);
|
|
|
|
m_interpolator.create(16, m_channelSampleRate, m_settings.m_afBandwidth);
|
|
m_interpolatorDistanceRemain = (Real) m_channelSampleRate / sampleRate;
|
|
m_interpolatorDistance = (Real) m_channelSampleRate / (Real) sampleRate;
|
|
m_audioSampleRate = sampleRate;
|
|
|
|
QList<ObjectPipe*> pipes;
|
|
MainCore::instance()->getMessagePipes().getMessagePipes(m_channel, "reportdemod", pipes);
|
|
|
|
if (pipes.size() > 0)
|
|
{
|
|
for (const auto& pipe : pipes)
|
|
{
|
|
MessageQueue* messageQueue = qobject_cast<MessageQueue*>(pipe->m_element);
|
|
MainCore::MsgChannelDemodReport *msg = MainCore::MsgChannelDemodReport::create(m_channel, sampleRate);
|
|
messageQueue->push(msg);
|
|
}
|
|
}
|
|
}
|
|
|
|
void WFMDemodSink::applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force)
|
|
{
|
|
qDebug() << "WFMDemodSink::applyChannelSettings:"
|
|
<< " channelSampleRate: " << channelSampleRate
|
|
<< " channelFrequencyOffset: " << channelFrequencyOffset;
|
|
|
|
if((channelFrequencyOffset != m_channelFrequencyOffset) ||
|
|
(channelSampleRate != m_channelSampleRate) || force)
|
|
{
|
|
m_nco.setFreq(-channelFrequencyOffset, channelSampleRate);
|
|
}
|
|
|
|
if ((channelSampleRate != m_channelSampleRate) || force)
|
|
{
|
|
qDebug() << "WFMDemod::applyChannelSettings: m_interpolator.create";
|
|
m_interpolator.create(16, channelSampleRate, m_settings.m_afBandwidth);
|
|
m_interpolatorDistanceRemain = (Real) channelSampleRate / (Real) m_audioSampleRate;
|
|
m_interpolatorDistance = (Real) channelSampleRate / (Real) m_audioSampleRate;
|
|
qDebug() << "WFMDemod::applySettings: m_rfFilter->create_filter";
|
|
Real lowCut = -(m_settings.m_rfBandwidth / 2.0) / channelSampleRate;
|
|
Real hiCut = (m_settings.m_rfBandwidth / 2.0) / channelSampleRate;
|
|
m_rfFilter->create_filter(lowCut, hiCut);
|
|
//m_fmExcursion = m_settings.m_rfBandwidth / (Real) channelSampleRate;
|
|
m_phaseDiscri.setFMScaling((float) channelSampleRate / ((float) 2*m_fmExcursion));
|
|
qDebug("WFMDemod::applySettings: m_fmExcursion: %f", m_fmExcursion);
|
|
}
|
|
|
|
m_channelSampleRate = channelSampleRate;
|
|
m_channelFrequencyOffset = channelFrequencyOffset;
|
|
}
|
|
|
|
void WFMDemodSink::applySettings(const WFMDemodSettings& settings, bool force)
|
|
{
|
|
qDebug() << "WFMDemodSink::applySettings:"
|
|
<< " m_inputFrequencyOffset: " << settings.m_inputFrequencyOffset
|
|
<< " m_rfBandwidth: " << settings.m_rfBandwidth
|
|
<< " m_afBandwidth: " << settings.m_afBandwidth
|
|
<< " m_volume: " << settings.m_volume
|
|
<< " m_squelch: " << settings.m_squelch
|
|
<< " m_audioDeviceName: " << settings.m_audioDeviceName
|
|
<< " m_audioMute: " << settings.m_audioMute
|
|
<< " m_streamIndex: " << settings.m_streamIndex
|
|
<< " m_useReverseAPI: " << settings.m_useReverseAPI
|
|
<< " m_reverseAPIAddress: " << settings.m_reverseAPIAddress
|
|
<< " m_reverseAPIPort: " << settings.m_reverseAPIPort
|
|
<< " m_reverseAPIDeviceIndex: " << settings.m_reverseAPIDeviceIndex
|
|
<< " m_reverseAPIChannelIndex: " << settings.m_reverseAPIChannelIndex
|
|
<< " force: " << force;
|
|
|
|
if((settings.m_afBandwidth != m_settings.m_afBandwidth) ||
|
|
(settings.m_rfBandwidth != m_settings.m_rfBandwidth) || force)
|
|
{
|
|
qDebug() << "WFMDemodSink::applySettings: m_interpolator.create";
|
|
m_interpolator.create(16, m_channelSampleRate, settings.m_afBandwidth);
|
|
m_interpolatorDistanceRemain = (Real) m_channelSampleRate / (Real) m_audioSampleRate;
|
|
m_interpolatorDistance = (Real) m_channelSampleRate / (Real) m_audioSampleRate;
|
|
qDebug() << "WFMDemodSink::applySettings: m_rfFilter->create_filter";
|
|
Real lowCut = -(settings.m_rfBandwidth / 2.0) / m_channelSampleRate;
|
|
Real hiCut = (settings.m_rfBandwidth / 2.0) / m_channelSampleRate;
|
|
m_rfFilter->create_filter(lowCut, hiCut);
|
|
m_fmExcursion = (settings.m_rfBandwidth / 2) - m_settings.m_afBandwidth;
|
|
m_fmExcursion = m_fmExcursion < 2500 ? 2500 : m_fmExcursion;
|
|
//m_fmExcursion = settings.m_rfBandwidth / (Real) m_channelSampleRate;
|
|
m_phaseDiscri.setFMScaling((float) m_channelSampleRate / ((float) 2*m_fmExcursion));
|
|
qDebug("WFMDemodSink::applySettings: m_fmExcursion: %f", m_fmExcursion);
|
|
}
|
|
|
|
if ((settings.m_squelch != m_settings.m_squelch) || force)
|
|
{
|
|
qDebug() << "WFMDemodSink::applySettings: set m_squelchLevel";
|
|
m_squelchLevel = pow(10.0, settings.m_squelch / 10.0);
|
|
}
|
|
|
|
m_settings = settings;
|
|
}
|