feat: add log y axis to spectroscope (togglable)

also fixed spectroscope bugging when paused

src/app.rs

@@ -18,7 +18,6 @@ pub enum CurrentDisplayMode {
 }
 
 pub struct App {
-	pause: bool,
 	channels: u8,
 	graph: GraphConfig,
 	oscilloscope: Oscilloscope,
@@ -41,6 +40,7 @@ impl From::<&crate::ScopeArgs> for App {
 			references: !args.no_reference,
 			show_ui: !args.no_ui,
 			scatter: args.scatter,
+			pause: false,
 			marker_type: if args.no_braille {
 				Marker::Dot
 			} else {
@@ -56,7 +56,6 @@ impl From::<&crate::ScopeArgs> for App {
 			graph, oscilloscope, vectorscope, spectroscope,
 			mode: CurrentDisplayMode::Oscilloscope,
 			channels: args.channels,
-			pause: false,
 		}
 	}
 }
@@ -75,7 +74,7 @@ impl App {
 			let data = source.recv()
 				.ok_or(io::Error::new(io::ErrorKind::BrokenPipe, "data source returned null"))?;
 	
-			if !self.pause {
+			if !self.graph.pause {
 				channels = fmt.oscilloscope(data, self.channels);
 			}
 	
@@ -98,7 +97,7 @@ impl App {
 					let mut size = f.size();
 					if self.graph.show_ui {
 						f.render_widget(
-							make_header(&self.graph, &self.current_display().header(&self.graph), self.current_display().mode_str(), framerate, self.pause),
+							make_header(&self.graph, &self.current_display().header(&self.graph), self.current_display().mode_str(), framerate, self.graph.pause),
 							Rect { x: size.x, y: size.y, width: size.width, height:1 } // a 1px line at the top
 						);
 						size.height -= 1;
@@ -157,7 +156,7 @@ impl App {
 				KeyCode::Right    => update_value_i(&mut self.graph.samples, true, 25, magnitude, 0..self.graph.width*2),
 				KeyCode::Left     => update_value_i(&mut self.graph.samples, false, 25, magnitude, 0..self.graph.width*2),
 				KeyCode::Char('q') => quit = true,
-				KeyCode::Char(' ') => self.pause              = !self.pause,
+				KeyCode::Char(' ') => self.graph.pause        = !self.graph.pause,
 				KeyCode::Char('s') => self.graph.scatter      = !self.graph.scatter,
 				KeyCode::Char('h') => self.graph.show_ui      = !self.graph.show_ui,
 				KeyCode::Char('r') => self.graph.references   = !self.graph.references,

src/display/mod.rs

@@ -11,6 +11,7 @@ pub enum Dimension {
 
 #[derive(Debug, Clone)]
 pub struct GraphConfig {
+	pub pause: bool,
 	pub samples: u32,
 	pub sampling_rate: u32,
 	pub scale: u32,

src/display/spectroscope.rs

@@ -16,6 +16,7 @@ pub struct Spectroscope {
 	pub average: u32,
 	pub buf: Vec<VecDeque<Vec<f64>>>,
 	pub window: bool,
+	pub log_y: bool,
 }
 
 fn magnitude(c: Complex<f64>) -> f64 {
@@ -43,6 +44,7 @@ impl DisplayMode for Spectroscope {
 			buffer_size: args.buffer / (2 * args.channels as u32),
 			average: 1, buf: Vec::new(),
 			window: false,
+			log_y: true,
 		}
 	}
 
@@ -76,7 +78,10 @@ impl DisplayMode for Spectroscope {
 	fn axis(&self, cfg: &GraphConfig, dimension: Dimension) -> Axis {
 		let (name, bounds) = match dimension {
 			Dimension::X => ("frequency -", [20.0f64.ln(), ((cfg.samples as f64 / cfg.width as f64) * 20000.0).ln()]),
-			Dimension::Y => ("| level", [0.0, cfg.scale as f64 / 10.0]), // TODO super arbitraty! wtf
+			Dimension::Y => (
+				if self.log_y { "| level" } else { "| amplitude" },
+				[0.0, if self.log_y { (cfg.scale as f64 / 10.0).ln() } else { cfg.scale as f64 / 10.0 }]),
+				// TODO super arbitraty! wtf! also ugly inline ifs, get this thing together!
 		};
 		let mut a = Axis::default();
 		if cfg.show_ui { // TODO don't make it necessary to check show_ui inside here
@@ -87,6 +92,7 @@ impl DisplayMode for Spectroscope {
 
 	fn process(&mut self, cfg: &GraphConfig, data: &Vec<Vec<f64>>) -> Vec<DataSet> {
 		if self.average == 0 { self.average = 1 } // otherwise fft breaks
+		if !cfg.pause {
 			for (i, chan) in data.iter().enumerate() {
 				if self.buf.len() <= i {
 					self.buf.push(VecDeque::new());
@@ -96,6 +102,7 @@ impl DisplayMode for Spectroscope {
 					self.buf[i].pop_front();
 				}
 			}
+		}
 
 		let mut out = Vec::new();
 		let mut planner: FftPlanner<f64> = FftPlanner::new();
@@ -113,7 +120,11 @@ impl DisplayMode for Spectroscope {
 			fft.process(tmp.as_mut_slice());
 			out.push(DataSet::new(
 				self.channel_name(n),
-				tmp[..=tmp.len() / 2].iter().enumerate().map(|(i,x)| ((i as f64 * resolution).ln(), magnitude(*x))).collect(),
+				tmp[..=tmp.len() / 2]
+					.iter()
+					.enumerate()
+					.map(|(i,x)| ((i as f64 * resolution).ln(), if self.log_y { magnitude(*x).ln() } else { magnitude(*x) }))
+					.collect(),
 				cfg.marker_type,
 				if cfg.scatter { GraphType::Scatter } else { GraphType::Line },
 				cfg.palette(n),
@@ -129,13 +140,14 @@ impl DisplayMode for Spectroscope {
 				KeyCode::PageUp   => update_value_i(&mut self.average, true, 1, 1., 1..65535),
 				KeyCode::PageDown => update_value_i(&mut self.average, false, 1, 1., 1..65535),
 				KeyCode::Char('w') => self.window = !self.window,
+				KeyCode::Char('l') => self.log_y = !self.log_y,
 				_ => {}
 			}
 		}
 	}
 
 	fn references(&self, cfg: &GraphConfig) -> Vec<DataSet> {
-		let s = cfg.scale as f64 / 10.0;
+		let s = if self.log_y { (cfg.scale as f64 / 10.0).ln() } else { cfg.scale as f64 / 10.0 };
 		vec![
 			DataSet::new("".into(), vec![(0.0, 0.0), ((cfg.samples as f64).ln(), 0.0)], cfg.marker_type, GraphType::Line, cfg.axis_color),