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Document intentional signed length and FIFO truncation behavior

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Co-authored-by: srcejon <57259258+srcejon@users.noreply.github.com>
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copilot-swe-agent[bot] 2026-04-21 19:56:46 +00:00 committed by GitHub
parent ebbfd76504
commit a4462cfa40
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2
plugins/samplesink/usrpoutput/usrpoutputthread.cpp
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@ -123,6 +123,7 @@ void USRPOutputThread::run()
// Interpolate according to specified log2 (ex: log2=4 => decim=16)
void USRPOutputThread::callback(qint16* buf, qint32 len)
{
// Keep signed length to match callback interfaces used by other output threads.
if (len <= 0) {
return;
}
@ -130,6 +131,7 @@ void USRPOutputThread::callback(qint16* buf, qint32 len)
const unsigned int interpolationFactor = 1U << m_log2Interp;
SampleVector& data = m_sampleFifo->getData();
unsigned int iPart1Begin, iPart1End, iPart2Begin, iPart2End;
// Truncation is intentional here: reading more would overrun the fixed TX buffer when len is not divisible by interpolation factor.
m_sampleFifo->read(static_cast<unsigned int>(len)/interpolationFactor, iPart1Begin, iPart1End, iPart2Begin, iPart2End);
if (iPart1Begin != iPart1End) {