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SSB Demod: clamp audio to 16 bit samples boundaries for better audio overdrive robustness. Fixes #2452

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f4exb 2025-06-02 22:01:21 +02:00
parent f7b9727ef9
commit c333fb505c
1 changed files with 7 additions and 11 deletions
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18
plugins/channelrx/demodssb/ssbdemodsink.cpp
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@ -195,16 +195,12 @@ void SSBDemodSink::processOneSample(Complex &ci)
if (m_audioBinaual) if (m_audioBinaual)
{ {
if (m_audioFlipChannels) Real left = m_audioFlipChannels ? z.imag() : z.real();
{ Real right = m_audioFlipChannels ? z.real() : z.imag();
m_audioBuffer[m_audioBufferFill].r = (qint16)(z.imag() * m_volume); left = std::clamp(left * m_volume, -32767.0f, 32767.0f);
m_audioBuffer[m_audioBufferFill].l = (qint16)(z.real() * m_volume); right = std::clamp(right * m_volume, -32767.0f, 32767.0f);
} m_audioBuffer[m_audioBufferFill].l = (qint16)left;
else m_audioBuffer[m_audioBufferFill].r = (qint16)right;
{
m_audioBuffer[m_audioBufferFill].r = (qint16)(z.real() * m_volume);
m_audioBuffer[m_audioBufferFill].l = (qint16)(z.imag() * m_volume);
}
m_demodBuffer[m_demodBufferFill++] = z.real(); m_demodBuffer[m_demodBufferFill++] = z.real();
m_demodBuffer[m_demodBufferFill++] = z.imag(); m_demodBuffer[m_demodBufferFill++] = z.imag();
@ -212,7 +208,7 @@ void SSBDemodSink::processOneSample(Complex &ci)
else else
{ {
Real demod = (z.real() + z.imag()) * 0.7; Real demod = (z.real() + z.imag()) * 0.7;
qint16 sample = (qint16)(demod * m_volume); qint16 sample = (qint16)(std::clamp(demod * m_volume, -32767.0f, 32767.0f));
m_audioBuffer[m_audioBufferFill].l = sample; m_audioBuffer[m_audioBufferFill].l = sample;
m_audioBuffer[m_audioBufferFill].r = sample; m_audioBuffer[m_audioBufferFill].r = sample;
m_demodBuffer[m_demodBufferFill++] = (z.real() + z.imag()) * 0.7; m_demodBuffer[m_demodBufferFill++] = (z.real() + z.imag()) * 0.7;