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UDP sink plugin: implemented NFM

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This commit is contained in:
f4exb 2017-08-18 12:30:51 +02:00
parent dda67c0947
commit 38000f3305
2 changed files with 38 additions and 4 deletions
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40
plugins/channeltx/udpsink/udpsink.cpp
View File

@ -44,6 +44,7 @@ UDPSink::UDPSink(MessageQueue* uiMessageQueue, UDPSinkGUI* udpSinkGUI, BasebandS
m_squelchOpenCount(0),
m_squelchCloseCount(0),
m_squelchThreshold(4800),
m_modPhasor(0.0f),
m_settingsMutex(QMutex::Recursive)
{
setObjectName("UDPSink");
@ -113,11 +114,10 @@ void UDPSink::pull(Sample& sample)
void UDPSink::modulateSample()
{
//Real t;
Sample s;
if (m_running.m_sampleFormat == FormatS16LE)
if (m_running.m_sampleFormat == FormatS16LE) // Linear I/Q transponding
{
Sample s;
m_udpHandler.readSample(s);
uint64_t magsq = s.m_real * s.m_real + s.m_imag * s.m_imag;
@ -138,6 +138,38 @@ void UDPSink::modulateSample()
m_modSample.imag(0.0f);
}
}
else if ((m_running.m_sampleFormat == FormatNFMMono) || (m_running.m_sampleFormat == FormatNFM))
{
FixReal t;
Sample s;
if (m_running.m_sampleFormat == FormatNFMMono)
{
m_udpHandler.readSample(t);
}
else
{
m_udpHandler.readSample(s);
t = s.m_real;
}
m_inMovingAverage.feed((t*t)/1073741824.0);
m_inMagsq = m_inMovingAverage.average();
calculateSquelch(m_inMagsq);
if (m_squelchOpen)
{
m_modPhasor += (m_running.m_fmDeviation / m_running.m_inputSampleRate) * (t / 32768.0) * M_PI * 2.0f;
m_modSample.real(cos(m_modPhasor) * 10362.2f * m_running.m_gain);
m_modSample.imag(sin(m_modPhasor) * 10362.2f * m_running.m_gain);
}
else
{
m_modSample.real(0.0f);
m_modSample.imag(0.0f);
}
}
else
{
m_modSample.real(0.0f);

2
plugins/channeltx/udpsink/udpsink.h
View File

@ -256,6 +256,8 @@ private:
int m_squelchCloseCount;
int m_squelchThreshold;
float m_modPhasor; //!< Phasor for FM modulation
QMutex m_settingsMutex;
static const int m_sampleRateAverageItems = 17;