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Feat: fix scope / spectrum / vumeter

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This commit is contained in:
Raphaël Forment
2026-01-30 21:50:00 +01:00
parent bdba58312c
commit e1c4987db5
4 changed files with 27 additions and 18 deletions
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12
crates/ratatui/src/scope.rs
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@@ -64,6 +64,10 @@ fn render_horizontal(data: &[f32], area: Rect, buf: &mut Buffer, color: Color, g
let fine_width = width * 2;
let fine_height = height * 4;
// Auto-scale: find peak amplitude and normalize to fill height
let peak = data.iter().map(|s| s.abs()).fold(0.0f32, f32::max);
let auto_gain = if peak > 0.001 { gain / peak } else { gain };
PATTERNS.with(|p| {
let mut patterns = p.borrow_mut();
let size = width * height;
@@ -72,7 +76,7 @@ fn render_horizontal(data: &[f32], area: Rect, buf: &mut Buffer, color: Color, g
for fine_x in 0..fine_width {
let sample_idx = (fine_x * data.len()) / fine_width;
let sample = (data.get(sample_idx).copied().unwrap_or(0.0) * gain).clamp(-1.0, 1.0);
let sample = (data.get(sample_idx).copied().unwrap_or(0.0) * auto_gain).clamp(-1.0, 1.0);
let fine_y = ((1.0 - sample) * 0.5 * (fine_height - 1) as f32).round() as usize;
let fine_y = fine_y.min(fine_height - 1);
@@ -117,6 +121,10 @@ fn render_vertical(data: &[f32], area: Rect, buf: &mut Buffer, color: Color, gai
let fine_width = width * 2;
let fine_height = height * 4;
// Auto-scale: find peak amplitude and normalize to fill width
let peak = data.iter().map(|s| s.abs()).fold(0.0f32, f32::max);
let auto_gain = if peak > 0.001 { gain / peak } else { gain };
PATTERNS.with(|p| {
let mut patterns = p.borrow_mut();
let size = width * height;
@@ -125,7 +133,7 @@ fn render_vertical(data: &[f32], area: Rect, buf: &mut Buffer, color: Color, gai
for fine_y in 0..fine_height {
let sample_idx = (fine_y * data.len()) / fine_height;
let sample = (data.get(sample_idx).copied().unwrap_or(0.0) * gain).clamp(-1.0, 1.0);
let sample = (data.get(sample_idx).copied().unwrap_or(0.0) * auto_gain).clamp(-1.0, 1.0);
let fine_x = ((sample + 1.0) * 0.5 * (fine_width - 1) as f32).round() as usize;
let fine_x = fine_x.min(fine_width - 1);