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Remote input: R/W balance: calculate exponential moving average on floating point for better accuracy

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f4exb 2019-04-28 22:05:54 +02:00
parent c60079397e
commit d0779be1d2
1 changed files with 6 additions and 2 deletions
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8
plugins/samplesource/remoteinput/remoteinputbuffer.cpp
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@ -147,10 +147,14 @@ void RemoteInputBuffer::rwCorrectionEstimate(int slotIndex)
} }
else // read lags else // read lags
{ {
dBytes = (nbDecoderSlots * sizeof(BufferFrame)) - normalizedReadIndex - rwDelta; int bufSize = (nbDecoderSlots * sizeof(BufferFrame));
dBytes = bufSize - normalizedReadIndex - rwDelta;
} }
m_balCorrection = (m_balCorrection / 4) + (dBytes / (int) (m_currentMeta.m_sampleBytes * 2 * m_nbReads)); // correction is in number of samples. Alpha = 0.25 // calculate exponential moving average on floating point for better accuracy (was int)
double newCorrection = ((double) dBytes) / (((int) m_currentMeta.m_sampleBytes) * 2 * m_nbReads);
m_balCorrection = 0.25*m_balCorrection + 0.75*newCorrection; // exponential average with alpha = 0.75 (original is wrong)
//m_balCorrection = (m_balCorrection / 4) + (dBytes / (int) (m_currentMeta.m_sampleBytes * 2 * m_nbReads)); // correction is in number of samples. Alpha = 0.25
if (m_balCorrection < -m_balCorrLimit) { if (m_balCorrection < -m_balCorrLimit) {
m_balCorrection = -m_balCorrLimit; m_balCorrection = -m_balCorrLimit;