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ChirpChat modulator: removed unused constant ramps

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This commit is contained in:
f4exb
2020-03-07 11:06:41 +01:00
parent cfe726bcfa
commit 8f6890641e
2 changed files with 0 additions and 24 deletions
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plugins/channeltx/modchirpchat/chirpchatmodsource.cpp
-22
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@@ -24,8 +24,6 @@ const int ChirpChatModSource::m_levelNbSamples = 480; // every 10ms
ChirpChatModSource::ChirpChatModSource() :
m_channelSampleRate(48000),
m_channelFrequencyOffset(0),
m_downChirps(nullptr),
m_upChirps(nullptr),
m_phaseIncrements(nullptr),
m_modPhasor(0.0f),
m_levelCalcCount(0),
@@ -45,39 +43,19 @@ ChirpChatModSource::ChirpChatModSource() :
ChirpChatModSource::~ChirpChatModSource()
{
delete[] m_downChirps;
delete[] m_upChirps;
delete[] m_phaseIncrements;
}
void ChirpChatModSource::initSF(unsigned int sf)
{
if (m_downChirps) {
delete[] m_downChirps;
}
if (m_upChirps) {
delete[] m_upChirps;
}
m_fftLength = 1 << sf;
m_state = ChirpChatStateIdle;
m_quarterSamples = (m_fftLength/4)*ChirpChatModSettings::oversampling;
m_downChirps = new Complex[2*m_fftLength*ChirpChatModSettings::oversampling]; // Each table is 2 chirps long to allow use from arbitrary offsets.
m_upChirps = new Complex[2*m_fftLength*ChirpChatModSettings::oversampling];
float halfAngle = M_PI/ChirpChatModSettings::oversampling;
float phase = -halfAngle;
double accumulator = 0;
for (int i = 0; i < 2*m_fftLength*ChirpChatModSettings::oversampling; i++)
{
accumulator = fmod(accumulator + phase, 2*M_PI);
m_downChirps[i] = Complex(std::conj(std::polar(0.891235351562 * SDR_TX_SCALED, accumulator))); // -1 dB
m_upChirps[i] = Complex(std::polar(0.891235351562 * SDR_TX_SCALED, accumulator));
phase += (2*halfAngle) / (m_fftLength*ChirpChatModSettings::oversampling);
phase = phase > halfAngle ? phase - 2.0*halfAngle : phase;
}
if (m_phaseIncrements) {
delete[] m_phaseIncrements;
}