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SSB Modulator: interim state (5)

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This commit is contained in:
f4exb 2016-12-13 23:00:09 +01:00
parent a2089724cf
commit fa1c413e4f
3 changed files with 86 additions and 10 deletions
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21
plugins/channeltx/modssb/ssbmod.cpp
View File

@ -55,14 +55,19 @@ SSBMod::SSBMod() :
{
setObjectName("SSBMod");
m_config.m_outputSampleRate = 48000;
m_SSBFilter = new fftfilt(m_config.m_lowCutoff / m_config.m_audioSampleRate, m_config.m_bandwidth / m_config.m_audioSampleRate, m_ssbFftLen);
m_DSBFilter = new fftfilt((2.0f * m_config.m_bandwidth) / m_config.m_audioSampleRate, 2 * m_ssbFftLen);
m_SSBFilterBuffer = new Complex[m_ssbFftLen>>1]; // filter returns data exactly half of its size
m_DSBFilterBuffer = new Complex[m_ssbFftLen];
memset(m_SSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen>>1));
memset(m_DSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen));
m_config.m_outputSampleRate = 48000;
m_config.m_inputFrequencyOffset = 0;
m_config.m_bandwidth = 12500;
m_config.m_toneFrequency = 1000.0f;
m_config.m_audioSampleRate = DSPEngine::instance()->getAudioSampleRate();
apply();
//m_audioBuffer.resize(1<<14);
//m_audioBufferFill = 0;
@ -78,12 +83,7 @@ SSBMod::SSBMod() :
m_cwKeyer.setWPM(13);
m_cwKeyer.setMode(CWKeyer::CWNone);
m_SSBFilter = new fftfilt(m_config.m_lowCutoff / m_config.m_audioSampleRate, m_config.m_bandwidth / m_config.m_audioSampleRate, m_ssbFftLen);
m_DSBFilter = new fftfilt((2.0f * m_config.m_bandwidth) / m_config.m_audioSampleRate, 2 * m_ssbFftLen);
m_SSBFilterBuffer = new Complex[m_ssbFftLen>>1]; // filter returns data exactly half of its size
m_DSBFilterBuffer = new Complex[m_ssbFftLen];
memset(m_SSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen>>1));
memset(m_DSBFilterBuffer, 0, sizeof(Complex)*(m_ssbFftLen));
apply();
}
SSBMod::~SSBMod()
@ -157,7 +157,8 @@ void SSBMod::pull(Sample& sample)
m_interpolatorDistanceRemain += m_interpolatorDistance;
ci *= m_carrierNco.nextIQ(); // shift to carrier frequency
ci *= 16368.0f; //scaling
// ci *= m_carrierNco.nextIQ(); // shift to carrier frequency
m_settingsMutex.unlock();

72
plugins/channeltx/modssb/ssbmodgui.cpp
View File

@ -233,6 +233,36 @@ void SSBModGUI::on_deltaFrequency_changed(quint64 value)
}
}
void SSBModGUI::on_dsb_toggled(bool checked)
{
if (!checked)
{
if (ui->BW->value() < 0) {
m_channelMarker.setSidebands(ChannelMarker::lsb);
} else {
m_channelMarker.setSidebands(ChannelMarker::usb);
}
ui->glSpectrum->setCenterFrequency(m_rate/4);
ui->glSpectrum->setSampleRate(m_rate/2);
ui->glSpectrum->setSsbSpectrum(true);
on_lowCut_valueChanged(m_channelMarker.getLowCutoff()/100);
}
else
{
m_channelMarker.setSidebands(ChannelMarker::dsb);
ui->glSpectrum->setCenterFrequency(0);
ui->glSpectrum->setSampleRate(m_rate);
ui->glSpectrum->setSsbSpectrum(false);
applySettings();
}
setNewRate(m_spanLog2);
}
void SSBModGUI::on_BW_valueChanged(int value)
{
ui->BWText->setText(QString("%1 kHz").arg(value / 10.0, 0, 'f', 1));
@ -240,6 +270,48 @@ void SSBModGUI::on_BW_valueChanged(int value)
applySettings();
}
void SSBModGUI::on_lowCut_valueChanged(int value)
{
int lowCutoff = getEffectiveLowCutoff(value * 100);
m_channelMarker.setLowCutoff(lowCutoff);
QString s = QString::number(lowCutoff/1000.0, 'f', 1);
ui->lowCutText->setText(tr("%1k").arg(s));
ui->lowCut->setValue(lowCutoff/100);
applySettings();
}
int SSBModGUI::getEffectiveLowCutoff(int lowCutoff)
{
int ssbBW = m_channelMarker.getBandwidth() / 2;
int effectiveLowCutoff = lowCutoff;
const int guard = 100;
if (ssbBW < 0)
{
if (effectiveLowCutoff < ssbBW + guard)
{
effectiveLowCutoff = ssbBW + guard;
}
if (effectiveLowCutoff > 0)
{
effectiveLowCutoff = 0;
}
}
else
{
if (effectiveLowCutoff > ssbBW - guard)
{
effectiveLowCutoff = ssbBW - guard;
}
if (effectiveLowCutoff < 0)
{
effectiveLowCutoff = 0;
}
}
return effectiveLowCutoff;
}
void SSBModGUI::on_toneFrequency_valueChanged(int value)
{
ui->toneFrequencyText->setText(QString("%1k").arg(value / 100.0, 0, 'f', 2));

3
plugins/channeltx/modssb/ssbmodgui.h
View File

@ -60,7 +60,9 @@ private slots:
void on_deltaFrequency_changed(quint64 value);
void on_deltaMinus_toggled(bool minus);
void on_dsb_toggled(bool checked);
void on_BW_valueChanged(int value);
void on_lowCut_valueChanged(int value);
void on_volume_valueChanged(int value);
void on_audioMute_toggled(bool checked);
void on_tone_toggled(bool checked);
@ -105,6 +107,7 @@ private:
explicit SSBModGUI(PluginAPI* pluginAPI, DeviceSinkAPI *deviceAPI, QWidget* parent = NULL);
virtual ~SSBModGUI();
int getEffectiveLowCutoff(int lowCutoff);
bool setNewRate(int spanLog2);
void blockApplySettings(bool block);