mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-25 04:03:30 -05:00
782 lines
25 KiB
C++
782 lines
25 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2017 F4HKW //
|
|
// for F4EXB / SDRAngel //
|
|
// //
|
|
// 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 <stdio.h>
|
|
#include <complex.h>
|
|
|
|
#include "audio/audiooutput.h"
|
|
#include "dsp/dspengine.h"
|
|
#include "dsp/downchannelizer.h"
|
|
#include "dsp/threadedbasebandsamplesink.h"
|
|
#include "device/devicesourceapi.h"
|
|
|
|
#include "atvdemod.h"
|
|
|
|
MESSAGE_CLASS_DEFINITION(ATVDemod::MsgConfigureATVDemod, Message)
|
|
MESSAGE_CLASS_DEFINITION(ATVDemod::MsgConfigureRFATVDemod, Message)
|
|
MESSAGE_CLASS_DEFINITION(ATVDemod::MsgReportEffectiveSampleRate, Message)
|
|
MESSAGE_CLASS_DEFINITION(ATVDemod::MsgConfigureChannelizer, Message)
|
|
MESSAGE_CLASS_DEFINITION(ATVDemod::MsgReportChannelSampleRateChanged, Message)
|
|
|
|
const QString ATVDemod::m_channelIdURI = "sdrangel.channel.demodatv";
|
|
const QString ATVDemod::m_channelId = "ATVDemod";
|
|
const int ATVDemod::m_ssbFftLen = 1024;
|
|
|
|
ATVDemod::ATVDemod(DeviceSourceAPI *deviceAPI) :
|
|
ChannelSinkAPI(m_channelIdURI),
|
|
m_deviceAPI(deviceAPI),
|
|
m_scopeSink(0),
|
|
m_registeredTVScreen(0),
|
|
m_intNumberSamplePerTop(0),
|
|
m_intImageIndex(0),
|
|
m_intSynchroPoints(0),
|
|
m_blnSynchroDetected(false),
|
|
m_blnVerticalSynchroDetected(false),
|
|
m_fltAmpLineAverage(0.0f),
|
|
m_fltEffMin(2000000000.0f),
|
|
m_fltEffMax(-2000000000.0f),
|
|
m_fltAmpMin(-2000000000.0f),
|
|
m_fltAmpMax(2000000000.0f),
|
|
m_fltAmpDelta(1.0),
|
|
m_intColIndex(0),
|
|
m_intSampleIndex(0),
|
|
m_intRowIndex(0),
|
|
m_intLineIndex(0),
|
|
m_objAvgColIndex(3),
|
|
m_bfoPLL(200/1000000, 100/1000000, 0.01),
|
|
m_bfoFilter(200.0, 1000000.0, 0.9),
|
|
m_interpolatorDistance(1.0f),
|
|
m_interpolatorDistanceRemain(0.0f),
|
|
m_DSBFilter(0),
|
|
m_DSBFilterBuffer(0),
|
|
m_DSBFilterBufferIndex(0),
|
|
m_objSettingsMutex(QMutex::Recursive)
|
|
{
|
|
setObjectName(m_channelId);
|
|
|
|
//*************** ATV PARAMETERS ***************
|
|
//m_intNumberSamplePerLine=0;
|
|
m_intSynchroPoints=0;
|
|
m_intNumberOfLines=0;
|
|
m_interleaved = true;
|
|
|
|
m_DSBFilter = new fftfilt((2.0f * m_rfConfig.m_fltRFBandwidth) / 1000000, 2 * m_ssbFftLen); // arbitrary 1 MS/s sample rate
|
|
m_DSBFilterBuffer = new Complex[m_ssbFftLen];
|
|
memset(m_DSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen));
|
|
|
|
memset((void*)m_fltBufferI,0,6*sizeof(float));
|
|
memset((void*)m_fltBufferQ,0,6*sizeof(float));
|
|
|
|
m_objPhaseDiscri.setFMScaling(1.0f);
|
|
|
|
applyStandard();
|
|
|
|
m_channelizer = new DownChannelizer(this);
|
|
m_threadedChannelizer = new ThreadedBasebandSampleSink(m_channelizer, this);
|
|
m_deviceAPI->addThreadedSink(m_threadedChannelizer);
|
|
m_deviceAPI->addChannelAPI(this);
|
|
|
|
connect(m_channelizer, SIGNAL(inputSampleRateChanged()), this, SLOT(channelSampleRateChanged()));
|
|
}
|
|
|
|
ATVDemod::~ATVDemod()
|
|
{
|
|
m_deviceAPI->removeChannelAPI(this);
|
|
m_deviceAPI->removeThreadedSink(m_threadedChannelizer);
|
|
delete m_threadedChannelizer;
|
|
delete m_channelizer;
|
|
delete m_DSBFilter;
|
|
delete m_DSBFilterBuffer;
|
|
}
|
|
|
|
void ATVDemod::setTVScreen(TVScreen *objScreen)
|
|
{
|
|
m_registeredTVScreen = objScreen;
|
|
}
|
|
|
|
void ATVDemod::configure(
|
|
MessageQueue* objMessageQueue,
|
|
float fltLineDurationUs,
|
|
float fltTopDurationUs,
|
|
float fltFramePerS,
|
|
ATVStd enmATVStandard,
|
|
int intNumberOfLines,
|
|
float fltRatioOfRowsToDisplay,
|
|
float fltVoltLevelSynchroTop,
|
|
float fltVoltLevelSynchroBlack,
|
|
bool blnHSync,
|
|
bool blnVSync,
|
|
bool blnInvertVideo,
|
|
int intVideoTabIndex)
|
|
{
|
|
Message* msgCmd = MsgConfigureATVDemod::create(
|
|
fltLineDurationUs,
|
|
fltTopDurationUs,
|
|
fltFramePerS,
|
|
enmATVStandard,
|
|
intNumberOfLines,
|
|
fltRatioOfRowsToDisplay,
|
|
fltVoltLevelSynchroTop,
|
|
fltVoltLevelSynchroBlack,
|
|
blnHSync,
|
|
blnVSync,
|
|
blnInvertVideo,
|
|
intVideoTabIndex);
|
|
objMessageQueue->push(msgCmd);
|
|
}
|
|
|
|
void ATVDemod::configureRF(
|
|
MessageQueue* objMessageQueue,
|
|
int64_t frequencyOffset,
|
|
ATVModulation enmModulation,
|
|
float fltRFBandwidth,
|
|
float fltRFOppBandwidth,
|
|
bool blnFFTFiltering,
|
|
bool blnDecimatorEnable,
|
|
float fltBFOFrequency,
|
|
float fmDeviation)
|
|
{
|
|
Message* msgCmd = MsgConfigureRFATVDemod::create(
|
|
frequencyOffset,
|
|
enmModulation,
|
|
fltRFBandwidth,
|
|
fltRFOppBandwidth,
|
|
blnFFTFiltering,
|
|
blnDecimatorEnable,
|
|
fltBFOFrequency,
|
|
fmDeviation);
|
|
objMessageQueue->push(msgCmd);
|
|
}
|
|
|
|
void ATVDemod::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end, bool firstOfBurst __attribute__((unused)))
|
|
{
|
|
float fltI;
|
|
float fltQ;
|
|
Complex ci;
|
|
|
|
//********** Let's rock and roll buddy ! **********
|
|
|
|
m_objSettingsMutex.lock();
|
|
|
|
//********** Accessing ATV Screen context **********
|
|
|
|
#ifdef EXTENDED_DIRECT_SAMPLE
|
|
|
|
qint16 * ptrBufferToRelease = 0;
|
|
qint16 * ptrBuffer;
|
|
qint32 intLen;
|
|
|
|
//********** Reading direct samples **********
|
|
|
|
SampleVector::const_iterator it = begin;
|
|
intLen = it->intLen;
|
|
ptrBuffer = it->ptrBuffer;
|
|
ptrBufferToRelease = ptrBuffer;
|
|
++it;
|
|
|
|
for(qint32 intInd=0; intInd<intLen-1; intInd +=2)
|
|
{
|
|
|
|
fltI= ((qint32) (*ptrBuffer)) << 4;
|
|
ptrBuffer ++;
|
|
fltQ= ((qint32) (*ptrBuffer)) << 4;
|
|
ptrBuffer ++;
|
|
|
|
#else
|
|
|
|
for (SampleVector::const_iterator it = begin; it != end; ++it /* ++it **/)
|
|
{
|
|
|
|
fltI = it->real();
|
|
fltQ = it->imag();
|
|
#endif
|
|
Complex c(fltI, fltQ);
|
|
|
|
if (m_rfRunning.m_intFrequencyOffset != 0)
|
|
{
|
|
c *= m_nco.nextIQ();
|
|
}
|
|
|
|
if (m_rfRunning.m_blndecimatorEnable)
|
|
{
|
|
if (m_interpolator.decimate(&m_interpolatorDistanceRemain, c, &ci))
|
|
{
|
|
demod(ci);
|
|
m_interpolatorDistanceRemain += m_interpolatorDistance;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
demod(c);
|
|
}
|
|
}
|
|
|
|
if ((m_running.m_intVideoTabIndex == 1) && (m_scopeSink != 0)) // do only if scope tab is selected and scope is available
|
|
{
|
|
m_scopeSink->feed(m_scopeSampleBuffer.begin(), m_scopeSampleBuffer.end(), false); // m_ssb = positive only
|
|
m_scopeSampleBuffer.clear();
|
|
}
|
|
|
|
#ifdef EXTENDED_DIRECT_SAMPLE
|
|
if (ptrBufferToRelease != 0)
|
|
{
|
|
delete ptrBufferToRelease;
|
|
}
|
|
#endif
|
|
|
|
m_objSettingsMutex.unlock();
|
|
}
|
|
|
|
void ATVDemod::demod(Complex& c)
|
|
{
|
|
float fltDivSynchroBlack = 1.0f - m_running.m_fltVoltLevelSynchroBlack;
|
|
float fltNormI;
|
|
float fltNormQ;
|
|
float fltNorm;
|
|
float fltVal;
|
|
int intVal;
|
|
|
|
//********** FFT filtering **********
|
|
|
|
if (m_rfRunning.m_blnFFTFiltering)
|
|
{
|
|
int n_out;
|
|
fftfilt::cmplx *filtered;
|
|
|
|
n_out = m_DSBFilter->runAsym(c, &filtered, m_rfRunning.m_enmModulation != ATV_LSB); // all usb except explicitely lsb
|
|
|
|
if (n_out > 0)
|
|
{
|
|
memcpy((void *) m_DSBFilterBuffer, (const void *) filtered, n_out*sizeof(Complex));
|
|
m_DSBFilterBufferIndex = 0;
|
|
}
|
|
|
|
m_DSBFilterBufferIndex++;
|
|
}
|
|
|
|
//********** demodulation **********
|
|
|
|
const float& fltI = m_rfRunning.m_blnFFTFiltering ? m_DSBFilterBuffer[m_DSBFilterBufferIndex-1].real() : c.real();
|
|
const float& fltQ = m_rfRunning.m_blnFFTFiltering ? m_DSBFilterBuffer[m_DSBFilterBufferIndex-1].imag() : c.imag();
|
|
double magSq;
|
|
|
|
if ((m_rfRunning.m_enmModulation == ATV_FM1) || (m_rfRunning.m_enmModulation == ATV_FM2))
|
|
{
|
|
//Amplitude FM
|
|
magSq = fltI*fltI + fltQ*fltQ;
|
|
m_objMagSqAverage(magSq);
|
|
fltNorm = sqrt(magSq);
|
|
fltNormI= fltI/fltNorm;
|
|
fltNormQ= fltQ/fltNorm;
|
|
|
|
//-2 > 2 : 0 -> 1 volt
|
|
//0->0.3 synchro 0.3->1 image
|
|
|
|
if (m_rfRunning.m_enmModulation == ATV_FM1)
|
|
{
|
|
//YDiff Cd
|
|
fltVal = m_fltBufferI[0]*(fltNormQ - m_fltBufferQ[1]);
|
|
fltVal -= m_fltBufferQ[0]*(fltNormI - m_fltBufferI[1]);
|
|
|
|
fltVal += 2.0f;
|
|
fltVal /= 4.0f;
|
|
|
|
}
|
|
else
|
|
{
|
|
//YDiff Folded
|
|
fltVal = m_fltBufferI[2]*((m_fltBufferQ[5]-fltNormQ)/16.0f + m_fltBufferQ[1] - m_fltBufferQ[3]);
|
|
fltVal -= m_fltBufferQ[2]*((m_fltBufferI[5]-fltNormI)/16.0f + m_fltBufferI[1] - m_fltBufferI[3]);
|
|
|
|
fltVal += 2.125f;
|
|
fltVal /= 4.25f;
|
|
|
|
m_fltBufferI[5]=m_fltBufferI[4];
|
|
m_fltBufferQ[5]=m_fltBufferQ[4];
|
|
|
|
m_fltBufferI[4]=m_fltBufferI[3];
|
|
m_fltBufferQ[4]=m_fltBufferQ[3];
|
|
|
|
m_fltBufferI[3]=m_fltBufferI[2];
|
|
m_fltBufferQ[3]=m_fltBufferQ[2];
|
|
|
|
m_fltBufferI[2]=m_fltBufferI[1];
|
|
m_fltBufferQ[2]=m_fltBufferQ[1];
|
|
}
|
|
|
|
m_fltBufferI[1]=m_fltBufferI[0];
|
|
m_fltBufferQ[1]=m_fltBufferQ[0];
|
|
|
|
m_fltBufferI[0]=fltNormI;
|
|
m_fltBufferQ[0]=fltNormQ;
|
|
|
|
if (m_rfRunning.m_fmDeviation != 1.0f)
|
|
{
|
|
fltVal = ((fltVal - 0.5f) / m_rfRunning.m_fmDeviation) + 0.5f;
|
|
}
|
|
}
|
|
else if (m_rfRunning.m_enmModulation == ATV_AM)
|
|
{
|
|
//Amplitude AM
|
|
magSq = fltI*fltI + fltQ*fltQ;
|
|
m_objMagSqAverage(magSq);
|
|
fltNorm = sqrt(magSq);
|
|
fltVal = fltNorm / SDR_RX_SCALEF;
|
|
|
|
//********** Mini and Maxi Amplitude tracking **********
|
|
|
|
if(fltVal<m_fltEffMin)
|
|
{
|
|
m_fltEffMin=fltVal;
|
|
}
|
|
|
|
if(fltVal>m_fltEffMax)
|
|
{
|
|
m_fltEffMax=fltVal;
|
|
}
|
|
|
|
//Normalisation
|
|
fltVal -= m_fltAmpMin;
|
|
fltVal /=m_fltAmpDelta;
|
|
}
|
|
else if ((m_rfRunning.m_enmModulation == ATV_USB) || (m_rfRunning.m_enmModulation == ATV_LSB))
|
|
{
|
|
magSq = fltI*fltI + fltQ*fltQ;
|
|
m_objMagSqAverage(magSq);
|
|
fltNorm = sqrt(magSq);
|
|
|
|
Real bfoValues[2];
|
|
float fltFiltered = m_bfoFilter.run(fltI);
|
|
m_bfoPLL.process(fltFiltered, bfoValues);
|
|
|
|
// do the mix
|
|
|
|
float mixI = fltI * bfoValues[0] - fltQ * bfoValues[1];
|
|
float mixQ = fltI * bfoValues[1] + fltQ * bfoValues[0];
|
|
|
|
if (m_rfRunning.m_enmModulation == ATV_USB) {
|
|
fltVal = (mixI + mixQ);
|
|
} else {
|
|
fltVal = (mixI - mixQ);
|
|
}
|
|
|
|
//********** Mini and Maxi Amplitude tracking **********
|
|
|
|
if(fltVal<m_fltEffMin)
|
|
{
|
|
m_fltEffMin=fltVal;
|
|
}
|
|
|
|
if(fltVal>m_fltEffMax)
|
|
{
|
|
m_fltEffMax=fltVal;
|
|
}
|
|
|
|
//Normalisation
|
|
fltVal -= m_fltAmpMin;
|
|
fltVal /=m_fltAmpDelta;
|
|
}
|
|
else if (m_rfRunning.m_enmModulation == ATV_FM3)
|
|
{
|
|
float rawDeviation;
|
|
fltVal = m_objPhaseDiscri.phaseDiscriminatorDelta(c, magSq, rawDeviation) + 0.5f;
|
|
//fltVal = fltVal < 0.0f ? 0.0f : fltVal > 1.0f ? 1.0f : fltVal;
|
|
m_objMagSqAverage(magSq);
|
|
fltNorm = sqrt(magSq);
|
|
}
|
|
else
|
|
{
|
|
magSq = fltI*fltI + fltQ*fltQ;
|
|
m_objMagSqAverage(magSq);
|
|
fltNorm = sqrt(magSq);
|
|
fltVal = 0.0f;
|
|
}
|
|
|
|
fltVal = m_running.m_blnInvertVideo ? 1.0f - fltVal : fltVal;
|
|
fltVal = (fltVal < -1.0f) ? -1.0f : (fltVal > 1.0f) ? 1.0f : fltVal;
|
|
|
|
if ((m_running.m_intVideoTabIndex == 1) && (m_scopeSink != 0)) { // feed scope buffer only if scope is present and visible
|
|
m_scopeSampleBuffer.push_back(Sample(fltVal*SDR_RX_SCALEF, 0.0f));
|
|
}
|
|
|
|
m_fltAmpLineAverage += fltVal;
|
|
|
|
//********** gray level **********
|
|
//-0.3 -> 0.7
|
|
intVal = (int) 255.0*(fltVal - m_running.m_fltVoltLevelSynchroBlack) / fltDivSynchroBlack;
|
|
|
|
//0 -> 255
|
|
if(intVal<0)
|
|
{
|
|
intVal=0;
|
|
}
|
|
else if(intVal>255)
|
|
{
|
|
intVal=255;
|
|
}
|
|
|
|
//********** process video sample **********
|
|
|
|
if (m_registeredTVScreen) // can process only if the screen is available (set via the GUI)
|
|
{
|
|
if (m_running.m_enmATVStandard == ATVStdHSkip) {
|
|
processHSkip(fltVal, intVal);
|
|
} else {
|
|
processClassic(fltVal, intVal);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ATVDemod::start()
|
|
{
|
|
//m_objTimer.start();
|
|
}
|
|
|
|
void ATVDemod::stop()
|
|
{
|
|
}
|
|
|
|
bool ATVDemod::handleMessage(const Message& cmd)
|
|
{
|
|
qDebug() << "ATVDemod::handleMessage";
|
|
|
|
if (DownChannelizer::MsgChannelizerNotification::match(cmd))
|
|
{
|
|
DownChannelizer::MsgChannelizerNotification& objNotif = (DownChannelizer::MsgChannelizerNotification&) cmd;
|
|
m_config.m_intSampleRate = objNotif.getSampleRate();
|
|
m_rfConfig.m_intFrequencyOffset = objNotif.getFrequencyOffset();
|
|
|
|
qDebug() << "ATVDemod::handleMessage: MsgChannelizerNotification:"
|
|
<< " m_intSampleRate: " << m_config.m_intSampleRate
|
|
<< " m_intFrequencyOffset: " << m_rfConfig.m_intFrequencyOffset;
|
|
|
|
applySettings();
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureChannelizer::match(cmd))
|
|
{
|
|
MsgConfigureChannelizer& cfg = (MsgConfigureChannelizer&) cmd;
|
|
|
|
m_channelizer->configure(m_channelizer->getInputMessageQueue(),
|
|
m_channelizer->getInputSampleRate(),
|
|
cfg.getCenterFrequency());
|
|
|
|
qDebug() << "ATVDemod::handleMessage: MsgConfigureChannelizer: sampleRate: " << m_channelizer->getInputSampleRate()
|
|
<< " centerFrequency: " << cfg.getCenterFrequency();
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureATVDemod::match(cmd))
|
|
{
|
|
MsgConfigureATVDemod& objCfg = (MsgConfigureATVDemod&) cmd;
|
|
|
|
m_config = objCfg.m_objMsgConfig;
|
|
|
|
qDebug() << "ATVDemod::handleMessage: MsgConfigureATVDemod:"
|
|
<< " m_fltVoltLevelSynchroBlack:" << m_config.m_fltVoltLevelSynchroBlack
|
|
<< " m_fltVoltLevelSynchroTop:" << m_config.m_fltVoltLevelSynchroTop
|
|
<< " m_fltFramePerS:" << m_config.m_fltFramePerS
|
|
<< " m_fltLineDurationUs:" << m_config.m_fltLineDuration
|
|
<< " m_fltRatioOfRowsToDisplay:" << m_config.m_fltRatioOfRowsToDisplay
|
|
<< " m_fltTopDurationUs:" << m_config.m_fltTopDuration
|
|
<< " m_blnHSync:" << m_config.m_blnHSync
|
|
<< " m_blnVSync:" << m_config.m_blnVSync;
|
|
|
|
applySettings();
|
|
|
|
return true;
|
|
}
|
|
else if (MsgConfigureRFATVDemod::match(cmd))
|
|
{
|
|
MsgConfigureRFATVDemod& objCfg = (MsgConfigureRFATVDemod&) cmd;
|
|
|
|
m_rfConfig = objCfg.m_objMsgConfig;
|
|
|
|
qDebug() << "ATVDemod::handleMessage: MsgConfigureRFATVDemod:"
|
|
<< " m_intFrequencyOffset:" << m_rfConfig.m_intFrequencyOffset
|
|
<< " m_enmModulation:" << m_rfConfig.m_enmModulation
|
|
<< " m_fltRFBandwidth:" << m_rfConfig.m_fltRFBandwidth
|
|
<< " m_fltRFOppBandwidth:" << m_rfConfig.m_fltRFOppBandwidth
|
|
<< " m_blnFFTFiltering:" << m_rfConfig.m_blnFFTFiltering
|
|
<< " m_blnDecimatorEnable:" << m_rfConfig.m_blndecimatorEnable
|
|
<< " m_fltBFOFrequency:" << m_rfConfig.m_fltBFOFrequency
|
|
<< " m_fmDeviation:" << m_rfConfig.m_fmDeviation;
|
|
|
|
applySettings();
|
|
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
if (m_scopeSink != 0)
|
|
{
|
|
return m_scopeSink->handleMessage(cmd);
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ATVDemod::applySettings()
|
|
{
|
|
|
|
if (m_config.m_intSampleRate == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
bool forwardSampleRateChange = false;
|
|
|
|
if((m_rfConfig.m_intFrequencyOffset != m_rfRunning.m_intFrequencyOffset)
|
|
|| (m_rfConfig.m_enmModulation != m_rfRunning.m_enmModulation)
|
|
|| (m_config.m_intSampleRate != m_running.m_intSampleRate))
|
|
{
|
|
m_nco.setFreq(-m_rfConfig.m_intFrequencyOffset, m_config.m_intSampleRate);
|
|
}
|
|
|
|
if ((m_config.m_intSampleRate != m_running.m_intSampleRate)
|
|
|| (m_rfConfig.m_fltRFBandwidth != m_rfRunning.m_fltRFBandwidth)
|
|
|| (m_config.m_fltFramePerS != m_running.m_fltFramePerS)
|
|
|| (m_config.m_intNumberOfLines != m_running.m_intNumberOfLines))
|
|
{
|
|
m_objSettingsMutex.lock();
|
|
|
|
int linesPerSecond = m_config.m_intNumberOfLines * m_config.m_fltFramePerS;
|
|
|
|
int maxPoints = m_config.m_intSampleRate / linesPerSecond;
|
|
int i = maxPoints;
|
|
|
|
for (; i > 0; i--)
|
|
{
|
|
if ((i * linesPerSecond) % 10 == 0)
|
|
break;
|
|
}
|
|
|
|
int nbPointsPerRateUnit = i == 0 ? maxPoints : i;
|
|
m_configPrivate.m_intTVSampleRate = nbPointsPerRateUnit * linesPerSecond;
|
|
|
|
if (m_configPrivate.m_intTVSampleRate > 0)
|
|
{
|
|
m_interpolatorDistance = (Real) m_configPrivate.m_intTVSampleRate / (Real) m_config.m_intSampleRate;
|
|
}
|
|
else
|
|
{
|
|
m_configPrivate.m_intTVSampleRate = m_config.m_intSampleRate;
|
|
m_interpolatorDistance = 1.0f;
|
|
}
|
|
|
|
m_interpolatorDistanceRemain = 0;
|
|
m_interpolator.create(24,
|
|
m_configPrivate.m_intTVSampleRate,
|
|
m_rfConfig.m_fltRFBandwidth / getRFBandwidthDivisor(m_rfConfig.m_enmModulation),
|
|
3.0);
|
|
m_objSettingsMutex.unlock();
|
|
}
|
|
|
|
if((m_config.m_fltFramePerS != m_running.m_fltFramePerS)
|
|
|| (m_config.m_fltLineDuration != m_running.m_fltLineDuration)
|
|
|| (m_config.m_intSampleRate != m_running.m_intSampleRate)
|
|
|| (m_config.m_fltTopDuration != m_running.m_fltTopDuration)
|
|
|| (m_config.m_fltRatioOfRowsToDisplay != m_running.m_fltRatioOfRowsToDisplay)
|
|
|| (m_config.m_enmATVStandard != m_running.m_enmATVStandard)
|
|
|| (m_config.m_intNumberOfLines != m_running.m_intNumberOfLines))
|
|
{
|
|
m_objSettingsMutex.lock();
|
|
|
|
m_intNumberOfLines = m_config.m_intNumberOfLines;
|
|
|
|
applyStandard();
|
|
|
|
m_configPrivate.m_intNumberSamplePerLine = (int) (m_config.m_fltLineDuration * m_config.m_intSampleRate);
|
|
m_intNumberSamplePerTop = (int) (m_config.m_fltTopDuration * m_config.m_intSampleRate);
|
|
|
|
if (m_registeredTVScreen)
|
|
{
|
|
//m_registeredTVScreen->setRenderImmediate(!(m_config.m_fltFramePerS > 25.0f));
|
|
m_registeredTVScreen->resizeTVScreen(
|
|
m_configPrivate.m_intNumberSamplePerLine - m_intNumberSamplePerLineSignals,
|
|
m_intNumberOfLines - m_intNumberOfBlackLines);
|
|
}
|
|
|
|
qDebug() << "ATVDemod::applySettings:"
|
|
<< " m_fltLineDuration: " << m_config.m_fltLineDuration
|
|
<< " m_fltFramePerS: " << m_config.m_fltFramePerS
|
|
<< " m_intNumberOfLines: " << m_intNumberOfLines
|
|
<< " m_intNumberSamplePerLine: " << m_configPrivate.m_intNumberSamplePerLine
|
|
<< " m_intNumberOfBlackLines: " << m_intNumberOfBlackLines;
|
|
|
|
m_intImageIndex = 0;
|
|
m_intColIndex=0;
|
|
m_intRowIndex=0;
|
|
|
|
m_objSettingsMutex.unlock();
|
|
}
|
|
|
|
if ((m_configPrivate.m_intTVSampleRate != m_runningPrivate.m_intTVSampleRate)
|
|
|| (m_configPrivate.m_intNumberSamplePerLine != m_runningPrivate.m_intNumberSamplePerLine)
|
|
|| (m_config.m_intSampleRate != m_running.m_intSampleRate)
|
|
|| (m_rfConfig.m_blndecimatorEnable != m_rfRunning.m_blndecimatorEnable))
|
|
{
|
|
forwardSampleRateChange = true;
|
|
}
|
|
|
|
if ((m_configPrivate.m_intTVSampleRate != m_runningPrivate.m_intTVSampleRate)
|
|
|| (m_rfConfig.m_fltRFBandwidth != m_rfRunning.m_fltRFBandwidth)
|
|
|| (m_rfConfig.m_fltRFOppBandwidth != m_rfRunning.m_fltRFOppBandwidth))
|
|
{
|
|
m_objSettingsMutex.lock();
|
|
m_DSBFilter->create_asym_filter(m_rfConfig.m_fltRFOppBandwidth / m_configPrivate.m_intTVSampleRate,
|
|
m_rfConfig.m_fltRFBandwidth / m_configPrivate.m_intTVSampleRate);
|
|
memset(m_DSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen));
|
|
m_DSBFilterBufferIndex = 0;
|
|
m_objSettingsMutex.unlock();
|
|
}
|
|
|
|
if ((m_configPrivate.m_intTVSampleRate != m_runningPrivate.m_intTVSampleRate)
|
|
|| (m_rfConfig.m_fltBFOFrequency != m_rfRunning.m_fltBFOFrequency))
|
|
{
|
|
m_bfoPLL.configure(m_rfConfig.m_fltBFOFrequency / m_configPrivate.m_intTVSampleRate,
|
|
100.0 / m_configPrivate.m_intTVSampleRate,
|
|
0.01);
|
|
m_bfoFilter.setFrequencies(m_rfConfig.m_fltBFOFrequency, m_configPrivate.m_intTVSampleRate);
|
|
}
|
|
|
|
if (m_rfConfig.m_fmDeviation != m_rfRunning.m_fmDeviation)
|
|
{
|
|
m_objPhaseDiscri.setFMScaling(1.0f / m_rfConfig.m_fmDeviation);
|
|
}
|
|
|
|
m_running = m_config;
|
|
m_rfRunning = m_rfConfig;
|
|
m_runningPrivate = m_configPrivate;
|
|
|
|
if (forwardSampleRateChange && getMessageQueueToGUI())
|
|
{
|
|
int sampleRate = m_rfRunning.m_blndecimatorEnable ? m_runningPrivate.m_intTVSampleRate : m_running.m_intSampleRate;
|
|
MsgReportEffectiveSampleRate *report;
|
|
report = MsgReportEffectiveSampleRate::create(sampleRate, m_runningPrivate.m_intNumberSamplePerLine);
|
|
getMessageQueueToGUI()->push(report);
|
|
}
|
|
}
|
|
|
|
void ATVDemod::applyStandard()
|
|
{
|
|
switch(m_config.m_enmATVStandard)
|
|
{
|
|
case ATVStdHSkip:
|
|
// what is left in a line for the image
|
|
m_intNumberOfSyncLines = 0;
|
|
m_intNumberOfBlackLines = 0;
|
|
m_intNumberOfEqLines = 0; // not applicable
|
|
m_interleaved = false;
|
|
break;
|
|
case ATVStdShort:
|
|
// what is left in a line for the image
|
|
m_intNumberOfSyncLines = 4;
|
|
m_intNumberOfBlackLines = 4;
|
|
m_intNumberOfEqLines = 0;
|
|
m_interleaved = false;
|
|
break;
|
|
case ATVStdShortInterleaved:
|
|
// what is left in a line for the image
|
|
m_intNumberOfSyncLines = 4;
|
|
m_intNumberOfBlackLines = 4;
|
|
m_intNumberOfEqLines = 0;
|
|
m_interleaved = true;
|
|
break;
|
|
case ATVStd405: // Follows loosely the 405 lines standard
|
|
// what is left in a ine for the image
|
|
m_intNumberOfSyncLines = 24; // (15+7)*2 - 20
|
|
m_intNumberOfBlackLines = 28; // above + 4
|
|
m_intNumberOfEqLines = 3;
|
|
m_interleaved = true;
|
|
break;
|
|
case ATVStdPAL525: // Follows PAL-M standard
|
|
// what is left in a 64/1.008 us line for the image
|
|
m_intNumberOfSyncLines = 40; // (15+15)*2 - 20
|
|
m_intNumberOfBlackLines = 44; // above + 4
|
|
m_intNumberOfEqLines = 3;
|
|
m_interleaved = true;
|
|
break;
|
|
case ATVStdPAL625: // Follows PAL-B/G/H standard
|
|
default:
|
|
// what is left in a 64 us line for the image
|
|
m_intNumberOfSyncLines = 44; // (15+17)*2 - 20
|
|
m_intNumberOfBlackLines = 48; // above + 4
|
|
m_intNumberOfEqLines = 3;
|
|
m_interleaved = true;
|
|
}
|
|
|
|
// for now all standards apply this
|
|
m_intNumberSamplePerLineSignals = (int) ((12.0f/64.0f)*m_config.m_fltLineDuration * m_config.m_intSampleRate); // 12.0 = 7.3 + 4.7
|
|
m_intNumberSaplesPerHSync = (int) ((9.6f/64.0f)*m_config.m_fltLineDuration * m_config.m_intSampleRate); // 9.4 = 4.7 + 4.7
|
|
}
|
|
|
|
int ATVDemod::getSampleRate()
|
|
{
|
|
return m_running.m_intSampleRate;
|
|
}
|
|
|
|
int ATVDemod::getEffectiveSampleRate()
|
|
{
|
|
return m_rfRunning.m_blndecimatorEnable ? m_runningPrivate.m_intTVSampleRate : m_running.m_intSampleRate;
|
|
}
|
|
|
|
bool ATVDemod::getBFOLocked()
|
|
{
|
|
if ((m_rfRunning.m_enmModulation == ATV_USB) || (m_rfRunning.m_enmModulation == ATV_LSB))
|
|
{
|
|
return m_bfoPLL.locked();
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
float ATVDemod::getRFBandwidthDivisor(ATVModulation modulation)
|
|
{
|
|
switch(modulation)
|
|
{
|
|
case ATV_USB:
|
|
case ATV_LSB:
|
|
return 1.05f;
|
|
break;
|
|
case ATV_FM1:
|
|
case ATV_FM2:
|
|
case ATV_AM:
|
|
default:
|
|
return 2.2f;
|
|
}
|
|
}
|
|
|
|
void ATVDemod::channelSampleRateChanged()
|
|
{
|
|
qDebug("ATVDemod::channelSampleRateChanged");
|
|
if (getMessageQueueToGUI())
|
|
{
|
|
MsgReportChannelSampleRateChanged *msg = MsgReportChannelSampleRateChanged::create(m_channelizer->getInputSampleRate());
|
|
getMessageQueueToGUI()->push(msg);
|
|
}
|
|
}
|
|
|