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Compute the ratios for Spectral Compressor

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This commit is contained in:
Robbert van der Helm 2022-07-22 18:38:47 +02:00
parent 482599b351
commit 9aa4a64e5f
1 changed files with 43 additions and 1 deletions
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44
plugins/spectral_compressor/src/compressor_bank.rs
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@ -432,6 +432,12 @@ impl CompressorBank {
let curve = threshold.curve_curve.value;
let log2_center_freq = threshold.center_frequency.value.log2();
let high_freq_ratio_rolloff = compressor.high_freq_ratio_rolloff.value;
let log2_nyquist_freq = self
.log2_freqs
.last()
.expect("The CompressorBank has not yet been resized");
if self
.should_update_downwards_thresholds
.compare_exchange(true, false, Ordering::SeqCst, Ordering::SeqCst)
@ -466,6 +472,42 @@ impl CompressorBank {
}
}
// TODO: Ratios
if self
.should_update_downwards_ratios
.compare_exchange(true, false, Ordering::SeqCst, Ordering::SeqCst)
.is_ok()
{
// If the high-frequency rolloff is enabled then higher frequency bins will have their
// ratios reduced to reduce harshness. This follows the octave scale.
let target_ratio = compressor.downwards_ratio.value;
if high_freq_ratio_rolloff == 1.0 {
self.downwards_ratios.fill(target_ratio);
} else {
for (log2_freq, ratio) in
self.log2_freqs.iter().zip(self.downwards_ratios.iter_mut())
{
// This is scaled by octaves since we're calculating this in log space
let octave_fraction = log2_freq / log2_nyquist_freq;
*ratio = target_ratio * (1.0 - (octave_fraction * high_freq_ratio_rolloff));
}
}
}
if self
.should_update_upwards_ratios
.compare_exchange(true, false, Ordering::SeqCst, Ordering::SeqCst)
.is_ok()
{
let target_ratio = compressor.upwards_ratio.value;
if high_freq_ratio_rolloff == 1.0 {
self.upwards_ratios.fill(target_ratio);
} else {
for (log2_freq, ratio) in self.log2_freqs.iter().zip(self.upwards_ratios.iter_mut())
{
let octave_fraction = log2_freq / log2_nyquist_freq;
*ratio = target_ratio * (1.0 - (octave_fraction * high_freq_ratio_rolloff));
}
}
}
}
}