VE7UWU/sdrangel
1
0
Fork 0
mirror of https://github.com/f4exb/sdrangel.git synced 2026-06-02 14:04:46 -04:00
Code Issues Projects Releases Wiki Activity

Test source: basic pulse test pattern

Browse Source
This commit is contained in:
f4exb
2018-10-23 14:34:56 +02:00
parent f813c0134e
commit 30e36157a8
5 changed files with 59 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
plugins/samplesource/testsource/testsourcethread.cpp
+47
View File
@@ -38,6 +38,11 @@ TestSourceThread::TestSourceThread(SampleSinkFifo* sampleFifo, QObject* parent)
m_amModulation(0.5f),
m_fmDeviationUnit(0.0f),
m_fmPhasor(0.0f),
m_pulseWidth(150),
m_pulseSampleCount(0),
m_pulsePatternCount(0),
m_pulsePatternCycle(8),
m_pulsePatternPlaces(3),
m_samplerate(48000),
m_log2Decim(4),
m_fcPos(0),
@@ -262,6 +267,48 @@ void TestSourceThread::generate(quint32 chunksize)
m_buf[i++] = (int16_t) (im * (float) m_amplitudeBitsQ);
}
break;
case TestSourceSettings::ModulationPulse:
{
if (m_pulseSampleCount < m_pulseWidth) // sync pattern: 0
{
m_buf[i++] = m_amplitudeBitsDC;
m_buf[i++] = 0;
}
else if (m_pulseSampleCount < 2*m_pulseWidth) // sync pattern: 1
{
m_buf[i++] = (int16_t) (m_amplitudeBitsI + m_amplitudeBitsDC);
m_buf[i++] = (int16_t) (m_phaseImbalance * (float) m_amplitudeBitsQ);
}
else if (m_pulseSampleCount < 3*m_pulseWidth) // sync pattern: 0
{
m_buf[i++] = m_amplitudeBitsDC;
m_buf[i++] = 0;
}
else if (m_pulseSampleCount < (3+m_pulsePatternPlaces)*m_pulseWidth) // binary pattern
{
uint32_t patPulseSampleCount = m_pulseSampleCount - 3*m_pulseWidth;
uint32_t patPulseIndex = patPulseSampleCount / m_pulseWidth;
float patFigure = (m_pulsePatternCount & (1<<patPulseIndex)) != 0 ? 0.1 : 0.0; // make binary pattern -20dB vs sync pattern
m_buf[i++] = (int16_t) (patFigure * (float) m_amplitudeBitsI) + m_amplitudeBitsDC;
m_buf[i++] = (int16_t) (patFigure * (float) m_phaseImbalance * m_amplitudeBitsQ);
}
if (m_pulseSampleCount < (4+m_pulsePatternPlaces)*m_pulseWidth - 1)
{
m_pulseSampleCount++;
}
else
{
if (m_pulsePatternCount < m_pulsePatternCycle - 1) {
m_pulsePatternCount++;
} else {
m_pulsePatternCount = 0;
}
m_pulseSampleCount = 0;
}
}
break;
case TestSourceSettings::ModulationNone:
default:
{