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SSB Modulator: interim state (2)

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This commit is contained in:
f4exb 2016-12-13 00:43:59 +01:00
parent e9faec07c5
commit bcb13d556a
2 changed files with 51 additions and 24 deletions
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66
plugins/channeltx/modssb/ssbmod.cpp
View File

@ -34,8 +34,11 @@ MESSAGE_CLASS_DEFINITION(SSBMod::MsgReportFileSourceStreamData, Message)
MESSAGE_CLASS_DEFINITION(SSBMod::MsgReportFileSourceStreamTiming, Message)
const int SSBMod::m_levelNbSamples = 480; // every 10ms
const int SSBMod::m_ssbFftLen = 1024;
SSBMod::SSBMod() :
m_SSBFilter(0),
m_DSBFilter(0),
m_audioFifo(4, 48000),
m_settingsMutex(QMutex::Recursive),
m_fileSize(0),
@ -70,10 +73,21 @@ SSBMod::SSBMod() :
m_cwKeyer.setSampleRate(m_config.m_audioSampleRate);
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);
}
SSBMod::~SSBMod()
{
if (m_SSBFilter) {
delete m_SSBFilter;
}
if (m_DSBFilter) {
delete m_DSBFilter;
}
DSPEngine::instance()->removeAudioSource(&m_audioFifo);
}
@ -142,23 +156,23 @@ void SSBMod::pull(Sample& sample)
void SSBMod::modulateSample()
{
Real t;
Complex c;
pullAF(t);
calculateLevel(t);
pullAF(c);
calculateLevel(c);
m_modSample.real(0.0f); // TOOO
m_modSample.imag(0.0f);
}
void SSBMod::pullAF(Real& sample)
void SSBMod::pullAF(Complex& sample)
{
int16_t audioSample[2];
switch (m_afInput)
{
case SSBModInputTone:
sample = m_toneNco.next();
sample = m_toneNco.nextIQ();
break;
case SSBModInputFile:
// sox f4exb_call.wav --encoding float --endian little f4exb_call.raw
@ -176,31 +190,37 @@ void SSBMod::pullAF(Real& sample)
if (m_ifstream.eof())
{
sample = 0.0f;
sample.real() = 0.0f;
sample.imag() = 0.0f;
}
else
{
m_ifstream.read(reinterpret_cast<char*>(&sample), sizeof(Real));
sample *= m_running.m_volumeFactor;
Real real;
m_ifstream.read(reinterpret_cast<char*>(&real), sizeof(Real));
sample.real() = real * m_running.m_volumeFactor;
sample.imag() = 0.0f;
}
}
else
{
sample = 0.0f;
sample.real() = 0.0f;
sample.imag() = 0.0f;
}
break;
case SSBModInputAudio:
m_audioFifo.read(reinterpret_cast<quint8*>(audioSample), 1, 10);
sample = ((audioSample[0] + audioSample[1]) / 65536.0f) * m_running.m_volumeFactor;
sample.real() = ((audioSample[0] + audioSample[1]) / 65536.0f) * m_running.m_volumeFactor;
sample.imag() = 0.0f;
break;
case SSBModInputCWTone:
if (m_cwKeyer.getSample())
{
sample = m_toneNco.next();
sample = m_toneNco.nextIQ();
}
else
{
sample = 0.0f;
sample.real() = 0.0f;
sample.imag() = 0.0f;
m_toneNco.setPhase(0);
}
break;
@ -211,12 +231,14 @@ void SSBMod::pullAF(Real& sample)
}
}
void SSBMod::calculateLevel(Real& sample)
void SSBMod::calculateLevel(Complex& sample)
{
Real t = sample.real(); // TODO: possibly adjust depending on sample type
if (m_levelCalcCount < m_levelNbSamples)
{
m_peakLevel = std::max(std::fabs(m_peakLevel), sample);
m_levelSum += sample * sample;
m_peakLevel = std::max(std::fabs(m_peakLevel), t);
m_levelSum += t * t;
m_levelCalcCount++;
}
else
@ -267,7 +289,7 @@ bool SSBMod::handleMessage(const Message& cmd)
m_settingsMutex.lock();
band = cfg.getBandwidth();
lowCutoff = cfg.getLoCutoff();
lowCutoff = cfg.getLowCutoff();
if (band < 0) // negative means LSB
{
@ -289,10 +311,6 @@ bool SSBMod::handleMessage(const Message& cmd)
m_config.m_bandwidth = band;
m_config.m_lowCutoff = lowCutoff;
// TODO: move to apply
SSBFilter->create_filter(m_config.m_lowCutoff / (float) m_config.m_audioSampleRate, m_config.m_bandwidth / (float) m_config.m_audioSampleRate);
DSBFilter->create_dsb_filter((2.0f * m_config.m_bandwidth) / (float) m_config.m_audioSampleRate);
m_config.m_toneFrequency = cfg.getToneFrequency();
m_config.m_volumeFactor = cfg.getVolumeFactor();
m_config.m_spanLog2 = cfg.getSpanLog2();
@ -366,6 +384,13 @@ bool SSBMod::handleMessage(const Message& cmd)
void SSBMod::apply()
{
if ((m_config.m_bandwidth != m_running.m_bandwidth) ||
(m_config.m_lowCutoff != m_running.m_lowCutoff) ||
(m_config.m_audioSampleRate != m_running.m_audioSampleRate))
{
m_SSBFilter->create_filter(m_config.m_lowCutoff / (float) m_config.m_audioSampleRate, m_config.m_bandwidth / (float) m_config.m_audioSampleRate);
m_DSBFilter->create_dsb_filter((2.0f * m_config.m_bandwidth) / (float) m_config.m_audioSampleRate);
}
if ((m_config.m_inputFrequencyOffset != m_running.m_inputFrequencyOffset) ||
(m_config.m_outputSampleRate != m_running.m_outputSampleRate))
@ -404,6 +429,7 @@ void SSBMod::apply()
m_running.m_inputFrequencyOffset = m_config.m_inputFrequencyOffset;
m_running.m_bandwidth = m_config.m_bandwidth;
m_running.m_lowCutoff = m_config.m_lowCutoff;
m_running.m_usb = m_config.m_usb;
m_running.m_toneFrequency = m_config.m_toneFrequency;
m_running.m_volumeFactor = m_config.m_volumeFactor;
m_running.m_audioSampleRate = m_config.m_audioSampleRate;

9
plugins/channeltx/modssb/ssbmod.h
View File

@ -342,8 +342,9 @@ private:
Real m_interpolatorDistance;
Real m_interpolatorDistanceRemain;
bool m_interpolatorConsumed;
fftfilt* SSBFilter;
fftfilt* DSBFilter;
fftfilt* m_SSBFilter;
fftfilt* m_DSBFilter;
static const int m_ssbFftLen;
Real m_magsq;
MovingAverage<Real> m_movingAverage;
@ -371,8 +372,8 @@ private:
static const int m_levelNbSamples;
void apply();
void pullAF(Real& sample);
void calculateLevel(Real& sample);
void pullAF(Complex& sample);
void calculateLevel(Complex& sample);
void modulateSample();
void openFileStream();
void seekFileStream(int seekPercentage);