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Since we're adding more padding than a half-frame, we have to remove a scaled proportion of it

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This commit is contained in:
Chris Cannam
2022-06-27 16:37:52 +01:00
parent 5e726e79aa
commit 2940bde16f
1 changed files with 18 additions and 8 deletions
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26
src/finer/R3Stretcher.cpp
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@@ -486,18 +486,28 @@ R3Stretcher::process(const float *const *input, size_t samples, bool final)
createResampler();
}
// Pad to half of the longest frame. As with R2, in
// real-time mode we don't do this -- it's better to start
// with a swoosh than introduce more latency, and we don't
// want gaps when the ratio changes.
int pad = m_guideConfiguration.longestFftSize;
// Pad to the longest frame. As with R2, in real-time mode
// we don't do this -- it's better to start with a swoosh
// than introduce more latency, and we don't want gaps
// when the ratio changes.
int half = m_guideConfiguration.longestFftSize / 2;
int pad = half + half;
m_log.log(1, "offline mode: prefilling with", pad);
for (int c = 0; c < m_parameters.channels; ++c) {
m_channelData[c]->inbuf->zero(pad);
}
// By the time we skip this later we will have resampled
m_startSkip = int(round(pad / m_pitchScale));
// NB by the time we skip this later we may have resampled
// as well as stretched
m_startSkip = half + int(round(half / m_pitchScale * m_timeRatio));
if (m_startSkip < 0) {
m_log.log(0, "WARNING: calculated start skip < 0", m_startSkip);
m_startSkip = 0;
} else {
m_log.log(1, "start skip is", m_startSkip);
}
}
if (!m_keyFrameMap.empty()) {