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Remove unnecessary step

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Our interpolation_coefficients are already normalized.
This commit is contained in:
JasonLG1979 2023-06-27 16:13:31 -05:00
parent d1e4b4464a
commit 841f923549
1 changed files with 2 additions and 14 deletions
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16
playback/src/resampler.rs
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@ -50,7 +50,6 @@ impl<'a> IntoIterator for &'a DelayLine {
struct WindowedSincInterpolator { struct WindowedSincInterpolator {
interpolation_coefficients: Vec<f64>, interpolation_coefficients: Vec<f64>,
interpolation_coefficients_sum: f64,
delay_line: DelayLine, delay_line: DelayLine,
} }
@ -59,13 +58,10 @@ impl WindowedSincInterpolator {
let interpolation_coefficients = let interpolation_coefficients =
interpolation_quality.get_interpolation_coefficients(resample_factor_reciprocal); interpolation_quality.get_interpolation_coefficients(resample_factor_reciprocal);
let interpolation_coefficients_sum = interpolation_coefficients.iter().sum();
let delay_line = DelayLine::new(interpolation_coefficients.len()); let delay_line = DelayLine::new(interpolation_coefficients.len());
Self { Self {
interpolation_coefficients, interpolation_coefficients,
interpolation_coefficients_sum,
delay_line, delay_line,
} }
} }
@ -76,20 +72,12 @@ impl WindowedSincInterpolator {
self.delay_line.push(sample); self.delay_line.push(sample);
// Temporal convolution // Temporal convolution
let mut output_sample = self self.interpolation_coefficients
.interpolation_coefficients
.iter() .iter()
.zip(&self.delay_line) .zip(&self.delay_line)
.fold(0.0, |acc, (coefficient, delay_line_sample)| { .fold(0.0, |acc, (coefficient, delay_line_sample)| {
acc + coefficient * delay_line_sample acc + coefficient * delay_line_sample
}); })
if output_sample.is_normal() {
// Make sure that interpolation does not add any gain.
output_sample /= self.interpolation_coefficients_sum;
}
output_sample
} }
fn clear(&mut self) { fn clear(&mut self) {