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ATV Modulator: full SSB support

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This commit is contained in:
f4exb
2017-03-15 06:10:39 +01:00
parent fe66703954
commit 13455dfff8
4 changed files with 34 additions and 1 deletions
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plugins/channeltx/modatv/atvmod.cpp
+24
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@@ -188,6 +188,11 @@ void ATVMod::modulateSample()
m_modSample.real(cos(m_modPhasor) * 29204.0f); // -1 dB
m_modSample.imag(sin(m_modPhasor) * 29204.0f);
break;
case ATVModulationLSB:
case ATVModulationUSB:
m_modSample = modulateSSB(t);
m_modSample *= 29204.0f;
break;
case ATVModulationAM: // AM 90%
default:
m_modSample.real((t*1.8f + 0.1f) * 16384.0f); // modulate and scale zero frequency carrier
@@ -195,6 +200,25 @@ void ATVMod::modulateSample()
}
}
Complex& ATVMod::modulateSSB(Real& sample)
{
int n_out;
Complex ci(sample, 0.0f);
fftfilt::cmplx *filtered;
n_out = m_SSBFilter->runSSB(ci, &filtered, m_running.m_atvModulation == ATVModulationUSB);
if (n_out > 0)
{
memcpy((void *) m_SSBFilterBuffer, (const void *) filtered, n_out*sizeof(Complex));
m_SSBFilterBufferIndex = 0;
}
m_SSBFilterBufferIndex++;
return m_SSBFilterBuffer[m_SSBFilterBufferIndex-1];
}
void ATVMod::pullVideo(Real& sample)
{
int iLine = m_lineCount % m_nbLines2;