feat: restructured project, initial broken fft

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "scope-tui"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 authors = [ "alemi <me@alemi.dev>" ]
 description = "A simple oscilloscope/vectorscope for the terminal, inspired by cava"
@@ -19,3 +19,4 @@ libpulse-simple-binding = "2.25"
 clap = { version = "4.0.32", features = ["derive"] }
 derive_more = "0.99.17"
 thiserror = "1.0.48"
+easyfft = "0.4.0"

src/app.rs

@@ -1,444 +1,232 @@
 
-use std::{io::{self, ErrorKind}, time::{Duration, Instant}};
+use std::{io, time::{Duration, Instant}, ops::Range};
 use tui::{
-	style::Color, widgets::{GraphType, Table, Row, Cell}, symbols,
+	style::Color, widgets::{Table, Row, Cell}, symbols::Marker,
 	backend::Backend,
-	widgets::{Chart, Axis, Dataset},
-	Terminal, text::Span, style::{Style, Modifier}, layout::{Rect, Constraint}
+	widgets::Chart,
+	Terminal, style::{Style, Modifier}, layout::{Rect, Constraint}
 };
 use crossterm::event::{self, Event, KeyCode, KeyModifiers};
 
-use libpulse_simple_binding::Simple;
-use libpulse_binding::{stream::Direction, def::BufferAttr};
-use libpulse_binding::sample::{Spec, Format};
-
-use crate::{Args, source::{PulseAudioSimple, DataSource}};
-use crate::config::{ChartNames, ChartBounds, ChartReferences, AppConfig, Dimension};
+use crate::{source::DataSource, display::{GraphConfig, oscilloscope::Oscilloscope, DisplayMode, Dimension, vectorscope::Vectorscope, spectroscope::Spectroscope}};
 use crate::parser::{SampleParser, Signed16PCM};
 
-pub fn run_app<T : Backend>(args: Args, terminal: &mut Terminal<T>) -> Result<(), io::Error> {
-	// prepare globals
-	let mut app = App::from(&args);
-	let fmt = Signed16PCM{}; // TODO some way to choose this?
-	let mut source = PulseAudioSimple::new(
-		args.device.as_deref(),
-		args.channels,
-		args.sample_rate,
-		args.buffer,
-		args.server_buffer
-	).unwrap();
-
-	let mut fps = 0;
-	let mut framerate = 0;
-	let mut last_poll = Instant::now();
-	let mut channels = vec![];
-
-	loop {
-		let data = source.recv().unwrap();
-
-		if !app.cfg.pause {
-			channels = fmt.oscilloscope(data, args.channels);
-		}
-
-		let mut trigger_offset = 0;
-
-		if app.cfg.triggering {
-			// TODO allow to customize channel to use for triggering
-			if let Some(ch) = channels.get(0) {
-				for i in 0..ch.len() { // seek to first sample rising through threshold
-					if triggered(ch, i, app.cfg.threshold, app.cfg.depth, app.cfg.falling_edge) { // triggered
-						break;
-					} else {
-						trigger_offset += 1;
-					}
-				}
-				// for ch in channels.iter_mut() {
-				// 	let limit = if ch.len() < discard { ch.len() } else { discard };
-				// 	*ch = ch[limit..].to_vec();
-				// }
-			}
-		}
-
-		let mut measures : Vec<(String, Vec<(f64, f64)>)> = vec![];
-		let mut peaks : Vec<Vec<(f64, f64)>> = vec![];
-
-		// This third buffer is kinda weird because of lifetimes on Datasets, TODO
-		//  would be nice to make it more straight forward instead of this deep tuple magic
-		if app.cfg.vectorscope {
-			for (i, chunk) in channels.chunks(2).enumerate() {
-				let mut tmp = vec![];
-				match chunk.len() {
-					2 => {
-						for i in 0..std::cmp::min(chunk[0].len(), chunk[0].len()) {
-							tmp.push((chunk[0][i] as f64, chunk[1][i] as f64));
-						}
-					},
-					1 => {
-						for i in 0..chunk[0].len() {
-							tmp.push((chunk[0][i] as f64, i as f64));
-						}
-					},
-					_ => continue,
-				}
-				// split it in two so the math downwards still works the same
-				let pivot = tmp.len() / 2;
-				measures.push((channel_name(i * 2, true), tmp[pivot..].to_vec())); // put more recent first
-				measures.push((channel_name((i * 2) + 1, true), tmp[..pivot].to_vec()));
-			}
-		} else {
-			for (i, channel) in channels.iter().enumerate() {
-				let mut tmp = vec![];
-				let mut peak_up = 0.0;
-				let mut peak_down = 0.0;
-				for i in 0..channel.len() {
-					if i >= trigger_offset {
-						tmp.push(((i - trigger_offset) as f64, channel[i]));
-					}
-					if channel[i] > peak_up {
-						peak_up = channel[i];
-					}
-					if channel[i] < peak_down {
-						peak_down = channel[i];
-					}
-				}
-				measures.push((channel_name(i, false), tmp));
-				peaks.push(vec![(0.0, peak_down), (0.0, peak_up)]);
-			}
-		}
-
-		let samples = measures.iter().map(|(_,x)| x.len()).max().unwrap_or(0);
-
-		let mut datasets = vec![];
-
-		if app.cfg.references {
-			datasets.push(data_set("", &app.references.x, app.marker_type(), GraphType::Line, app.cfg.axis_color));
-			datasets.push(data_set("", &app.references.y, app.marker_type(), GraphType::Line, app.cfg.axis_color));
-		}
-
-		let trigger_pt;
-		if app.cfg.triggering {
-			trigger_pt = [(0.0, app.cfg.threshold)];
-			datasets.push(data_set("T", &trigger_pt, app.marker_type(), GraphType::Scatter, Color::Cyan));
-		}
-
-		let m_len = measures.len() - 1;
-
-		if !app.cfg.vectorscope && app.cfg.peaks {
-			for (i, pt) in peaks.iter().rev().enumerate() {
-				datasets.push(data_set("", pt, app.marker_type(), GraphType::Scatter, app.palette(m_len - i)));
-			}
-		}
-
-		for (i, (name, ds)) in measures.iter().rev().enumerate() {
-			datasets.push(data_set(&name, ds, app.marker_type(), app.graph_type(), app.palette(m_len - i)));
-		}
-
-		fps += 1;
-
-		if last_poll.elapsed().as_secs() >= 1 {
-			framerate = fps;
-			fps = 0;
-			last_poll = Instant::now();
-		}
-
-		terminal.draw(|f| {
-			let mut size = f.size();
-			if app.cfg.show_ui {
-				let heading = header(&app, samples as u32, framerate);
-				f.render_widget(heading, Rect { x: size.x, y: size.y, width: size.width, height:1 });
-				size.height -= 1;
-				size.y += 1;
-			}
-			let chart = Chart::new(datasets)
-				.x_axis(axis(&app, Dimension::X)) // TODO allow to have axis sometimes?
-				.y_axis(axis(&app, Dimension::Y));
-			f.render_widget(chart, size)
-		})?;
-
-		if process_events(&mut app, &args)? {
-			break;
-		}
-	}
-
-	Ok(())
+pub enum CurrentDisplayMode {
+	Oscilloscope,
+	Vectorscope,
+	Spectroscope,
 }
 
 pub struct App {
-	pub cfg: AppConfig,
-	pub references: ChartReferences,
-	pub bounds: ChartBounds,
-	pub names: ChartNames,
+	pause: bool,
+	channels: u8,
+	graph: GraphConfig,
+	oscilloscope: Oscilloscope,
+	vectorscope: Vectorscope,
+	spectroscope: Spectroscope,
+	mode: CurrentDisplayMode,
 }
 
 impl App {
-	pub fn update_values(&mut self) {
-		if self.cfg.scale > 32770 { // sample max value is 32768 (32 bits), but we leave 2 pixels for
-			self.cfg.scale = 32770; //  padding (and to not "disaling" range when reaching limit)
-		}
-		if self.cfg.scale < 0 {
-			self.cfg.scale = 0;
-		}
-		if self.cfg.depth < 1 {
-			self.cfg.depth = 1;
-		}
-		if self.cfg.vectorscope {
-			self.names.x = "left -".into();
-			self.names.y = "| right".into();
-			self.bounds.x = [-(self.cfg.scale as f64), self.cfg.scale as f64];
-			self.bounds.y = [-(self.cfg.scale as f64), self.cfg.scale as f64];
-			self.references.x = vec![(-(self.cfg.scale as f64), 0.0), (self.cfg.scale as f64, 0.0)];
-			self.references.y = vec![(0.0, -(self.cfg.scale as f64)), (0.0, self.cfg.scale as f64)];
-		} else {
-			self.names.x = "time -".into();
-			self.names.y = "| amplitude".into();
-			self.bounds.x = [0.0, self.cfg.width as f64];
-			self.bounds.y = [-(self.cfg.scale as f64), self.cfg.scale as f64];
-			self.references.x = vec![(0.0, 0.0), (self.cfg.width as f64, 0.0)];
-			let half_width = self.cfg.width as f64 / 2.0;
-			self.references.y = vec![(half_width, -(self.cfg.scale as f64)), (half_width, self.cfg.scale as f64)];
+	pub fn run<T : Backend>(&mut self, mut source: impl DataSource, terminal: &mut Terminal<T>) -> Result<(), io::Error> {
+		// prepare globals
+		let fmt = Signed16PCM{}; // TODO some way to choose this?
+	
+		let mut fps = 0;
+		let mut framerate = 0;
+		let mut last_poll = Instant::now();
+		let mut channels = vec![];
+	
+		loop {
+			let data = source.recv().unwrap();
+	
+			if !self.pause {
+				channels = fmt.oscilloscope(data, self.channels);
+			}
+	
+			fps += 1;
+	
+			if last_poll.elapsed().as_secs() >= 1 {
+				framerate = fps;
+				fps = 0;
+				last_poll = Instant::now();
+			}
+	
+			{
+				let display = match self.mode {
+					CurrentDisplayMode::Oscilloscope => &self.oscilloscope as &dyn DisplayMode,
+					CurrentDisplayMode::Vectorscope => &self.vectorscope as &dyn DisplayMode,
+					CurrentDisplayMode::Spectroscope => &self.spectroscope as &dyn DisplayMode,
+				};
+	
+				let mut datasets = Vec::new();
+				if self.graph.references {
+					datasets.append(&mut display.references(&self.graph));
+				}
+				datasets.append(&mut display.process(&self.graph, &channels));
+				terminal.draw(|f| {
+					let mut size = f.size();
+					if self.graph.show_ui {
+						f.render_widget(
+							make_header(&self.graph, &display.header(&self.graph), framerate, self.pause),
+							Rect { x: size.x, y: size.y, width: size.width, height:1 } // a 1px line at the top
+						);
+						size.height -= 1;
+						size.y += 1;
+					}
+					let chart = Chart::new(datasets.iter().map(|x| x.into()).collect())
+						.x_axis(display.axis(&self.graph, Dimension::X)) // TODO allow to have axis sometimes?
+						.y_axis(display.axis(&self.graph, Dimension::Y));
+					f.render_widget(chart, size)
+				}).unwrap();
+			}
+
+			while event::poll(Duration::from_millis(0))? { // process all enqueued events
+				let event = event::read()?;
+
+				if self.process_events(event.clone())? { return Ok(()); }
+				self.current_display().handle(event);
+			}
 		}
 	}
 
-	pub fn marker_type(&self) -> symbols::Marker {
-		if self.cfg.braille {
-			symbols::Marker::Braille
-		} else {
-			symbols::Marker::Dot
+	fn current_display(&mut self) -> &mut dyn DisplayMode {
+		match self.mode {
+			CurrentDisplayMode::Oscilloscope => &mut self.oscilloscope as &mut dyn DisplayMode,
+			CurrentDisplayMode::Vectorscope => &mut self.vectorscope as &mut dyn DisplayMode,
+			CurrentDisplayMode::Spectroscope => &mut self.spectroscope as &mut dyn DisplayMode,
 		}
 	}
 
-	pub fn graph_type(&self) -> GraphType {
-		if self.cfg.scatter {
-			GraphType::Scatter
-		} else {
-			GraphType::Line
-		}
+	fn process_events(&mut self, event: Event) -> Result<bool, io::Error> {
+		let mut quit = false;
+		if let Event::Key(key) = event {
+			if let KeyModifiers::CONTROL = key.modifiers {
+				match key.code { // mimic other programs shortcuts to quit, for user friendlyness
+					KeyCode::Char('c') | KeyCode::Char('q') | KeyCode::Char('w') => quit = true,
+					_ => {},
+				}
+			}
+			let magnitude = match key.modifiers {
+				KeyModifiers::SHIFT => 10.0,
+				KeyModifiers::CONTROL => 5.0,
+				KeyModifiers::ALT => 0.2,
+				_ => 1.0,
+			};
+			match key.code {
+				KeyCode::Up       => update_value_i(&mut self.graph.scale, true, 250, magnitude, 0..32768), // inverted to act as zoom
+				KeyCode::Down     => update_value_i(&mut self.graph.scale, false, 250, magnitude, 0..32768), // inverted to act as zoom
+				KeyCode::Right    => update_value_i(&mut self.graph.samples, true, 25, magnitude, 0..self.graph.width),
+				KeyCode::Left     => update_value_i(&mut self.graph.samples, false, 25, magnitude, 0..self.graph.width),
+				KeyCode::Char('q') => quit = true,
+				KeyCode::Char(' ') => self.pause              = !self.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,
+				KeyCode::Tab => { // switch modes
+					match self.mode {
+						CurrentDisplayMode::Oscilloscope => self.mode = CurrentDisplayMode::Vectorscope,
+						CurrentDisplayMode::Vectorscope => self.mode = CurrentDisplayMode::Spectroscope,
+						CurrentDisplayMode::Spectroscope => self.mode = CurrentDisplayMode::Oscilloscope,
+					}
+				},
+				_ => {},
+			}
+		};
+	
+		Ok(quit)
 	}
+}
 
-	pub fn palette(&self, index: usize) -> Color {
-		*self.cfg.palette.get(index % self.cfg.palette.len()).unwrap_or(&Color::White)
+pub fn update_value_f(val: &mut f64, base: f64, magnitude: f64, range: Range<f64>) {
+	let delta = base * magnitude;
+	if *val + delta > range.end {
+		*val = range.end
+	} else if *val + delta < range.start {
+		*val = range.start
+	} else {
+		*val += delta;
+	}
+}
+
+pub fn update_value_i(val: &mut u32, inc: bool, base: u32, magnitude: f64, range: Range<u32>) {
+	let delta = (base as f64 * magnitude) as u32;
+	if inc {
+		if range.end - delta < *val {
+			*val = range.end
+		} else {
+			*val += delta
+		}
+	} else if range.start + delta > *val {
+		*val = range.start
+	} else {
+		*val -= delta
 	}
 }
 
 impl From::<&crate::Args> for App {
 	fn from(args: &crate::Args) -> Self {
-		let cfg = AppConfig {
+		let graph = GraphConfig {
 			axis_color: Color::DarkGray,
+			labels_color: Color::Cyan,
 			palette: vec![Color::Red, Color::Yellow, Color::Green, Color::Magenta],
 			scale: args.range,
 			width: args.buffer / (2 * args.channels as u32), // TODO also make bit depth customizable
+			samples: args.buffer / (2 * args.channels as u32),
+			references: !args.no_reference,
+			show_ui: !args.no_ui,
+			scatter: args.scatter,
+			marker_type: if args.no_braille {
+				Marker::Dot
+			} else {
+				Marker::Braille
+			},
+		};
+
+		let oscilloscope = Oscilloscope {
 			triggering: args.triggering,
 			depth: args.check_depth,
 			threshold: args.threshold,
-			vectorscope: args.vectorscope,
-			references: !args.no_reference,
-			show_ui: !args.no_ui,
-			braille: !args.no_braille,
-			scatter: args.scatter,
 			falling_edge: args.falling_edge,
 			peaks: args.show_peaks,
+		};
+
+		let vectorscope = Vectorscope {};
+		let spectroscope = Spectroscope {};
+
+		App { 
+			graph, oscilloscope, vectorscope, spectroscope,
+			mode: CurrentDisplayMode::Oscilloscope,
+			channels: args.channels,
 			pause: false,
-		};
-
-		let mut app = App {
-			cfg,
-			references: ChartReferences::default(),
-			bounds: ChartBounds::default(),
-			names: ChartNames::default(),
-		};
-
-		app.update_values();
-
-		app
+		}
 	}
 }
-// TODO these functions probably shouldn't be here
 
-fn header(app: &App, samples: u32, framerate: u32) -> Table<'static> {
+fn make_header<'a>(cfg: &GraphConfig, module_header: &'a str, fps: usize, pause: bool) -> Table<'a> {
 	Table::new(
 		vec![
 			Row::new(
 				vec![
-					Cell::from(format!("TUI {}", if app.cfg.vectorscope { "Vectorscope" } else { "Oscilloscope" })).style(Style::default().fg(Color::Yellow).add_modifier(Modifier::BOLD)),
-					Cell::from(format!("{}",
-						if app.cfg.triggering {
-							format!(
-								"{} {:.0}{} trigger",
-								if app.cfg.falling_edge { "v" } else { "^" },
-								app.cfg.threshold,
-								if app.cfg.depth > 1 { format!(":{}", app.cfg.depth) } else { "".into() },
-							)
-						} else {
-							"live".into()
-						}
-					)),
-					Cell::from(format!("-{}+ range", app.cfg.scale)),
-					Cell::from(format!("{}/{} sample", app.cfg.width, samples as u32)),
-					Cell::from(format!("{}fps", framerate)),
-					Cell::from(format!("{}{}", if app.cfg.peaks { "|" } else { " " }, if app.cfg.scatter { "***" } else { "---" })),
-					Cell::from(format!("{}", if app.cfg.pause { "||" } else { "|>" } )),
+					Cell::from("tui **scope").style(Style::default().fg(*cfg.palette.get(0).expect("empty palette?")).add_modifier(Modifier::BOLD)),
+					Cell::from(module_header),
+					Cell::from(format!("-{}+", cfg.scale)),
+					Cell::from(format!("{}/{} spf", cfg.samples, cfg.width)),
+					Cell::from(format!("{}fps", fps)),
+					Cell::from(if cfg.scatter { "***" } else { "---" }),
+					Cell::from(if pause { "||" } else { "|>" }),
 				]
 			)
 		]
 	)
-	.style(Style::default().fg(Color::Cyan))
+	.style(Style::default().fg(cfg.labels_color))
 	.widths(&[
 		Constraint::Percentage(35),
-		Constraint::Percentage(15),
-		Constraint::Percentage(15),
-		Constraint::Percentage(15),
+		Constraint::Percentage(25),
+		Constraint::Percentage(7),
+		Constraint::Percentage(13),
 		Constraint::Percentage(6),
 		Constraint::Percentage(6),
 		Constraint::Percentage(6)
 	])
 }
-
-fn process_events(app: &mut App, args: &Args) -> Result<bool, io::Error> {
-	let mut quit = false;
-
-	if event::poll(Duration::from_millis(0))? { // process all enqueued events
-		let event = event::read()?;
-
-		match event {
-			Event::Key(key) => {
-				match key.modifiers {
-					KeyModifiers::SHIFT => {
-						match key.code {
-							KeyCode::Up       => app.cfg.scale     -= 1000, // inverted to act as zoom
-							KeyCode::Down     => app.cfg.scale     += 1000, // inverted to act as zoom
-							KeyCode::Right    => app.cfg.width     += 100,
-							KeyCode::Left     => app.cfg.width     -= 100,
-							KeyCode::PageUp   => app.cfg.threshold += 1000.0,
-							KeyCode::PageDown => app.cfg.threshold -= 1000.0,
-							_ => {},
-						}
-					},
-					KeyModifiers::CONTROL => {
-						match key.code { // mimic other programs shortcuts to quit, for user friendlyness
-							KeyCode::Char('c') | KeyCode::Char('q') | KeyCode::Char('w') => quit = true,
-							KeyCode::Up       => app.cfg.scale     -= 50, // inverted to act as zoom
-							KeyCode::Down     => app.cfg.scale     += 50, // inverted to act as zoom
-							KeyCode::Right    => app.cfg.width     += 5,
-							KeyCode::Left     => app.cfg.width     -= 5,
-							KeyCode::PageUp   => app.cfg.threshold += 50.0,
-							KeyCode::PageDown => app.cfg.threshold -= 50.0,
-							KeyCode::Char('r') => { // reset settings
-								app.cfg.references  = !args.no_reference;
-								app.cfg.show_ui     = !args.no_ui;
-								app.cfg.braille     = !args.no_braille;
-								app.cfg.threshold   = args.threshold;
-								app.cfg.width       = args.buffer / (args.channels as u32 * 2); // TODO ...
-								app.cfg.scale       = args.range;
-								app.cfg.vectorscope = args.vectorscope;
-								app.cfg.triggering  = args.triggering;
-							},
-							_ => {},
-						}
-					},
-					_ => {
-						match key.code {
-							KeyCode::Char('q') => quit = true,
-							KeyCode::Char(' ') => app.cfg.pause        = !app.cfg.pause,
-							KeyCode::Char('v') => app.cfg.vectorscope  = !app.cfg.vectorscope,
-							KeyCode::Char('s') => app.cfg.scatter      = !app.cfg.scatter,
-							KeyCode::Char('b') => app.cfg.braille      = !app.cfg.braille,
-							KeyCode::Char('h') => app.cfg.show_ui      = !app.cfg.show_ui,
-							KeyCode::Char('r') => app.cfg.references   = !app.cfg.references,
-							KeyCode::Char('e') => app.cfg.falling_edge = !app.cfg.falling_edge,
-							KeyCode::Char('t') => app.cfg.triggering   = !app.cfg.triggering,
-							KeyCode::Char('p') => app.cfg.peaks        = !app.cfg.peaks,
-							KeyCode::Char('=') => app.cfg.depth       += 1,
-							KeyCode::Char('-') => app.cfg.depth       -= 1,
-							KeyCode::Char('+') => app.cfg.depth       += 10,
-							KeyCode::Char('_') => app.cfg.depth       -= 10,
-							KeyCode::Up       => app.cfg.scale        -= 250, // inverted to act as zoom
-							KeyCode::Down     => app.cfg.scale        += 250, // inverted to act as zoom
-							KeyCode::Right    => app.cfg.width        += 25,
-							KeyCode::Left     => app.cfg.width        -= 25,
-							KeyCode::PageUp   => app.cfg.threshold    += 250.0,
-							KeyCode::PageDown => app.cfg.threshold    -= 250.0,
-							KeyCode::Tab => { // only reset "zoom"
-								app.cfg.width       = args.buffer / (args.channels as u32 * 2); // TODO ...
-								app.cfg.scale       = args.range;
-							},
-							KeyCode::Esc      => { // back to oscilloscope
-								app.cfg.references  = !args.no_reference;
-								app.cfg.show_ui     = !args.no_ui;
-								app.cfg.vectorscope = args.vectorscope;
-							},
-							_ => {},
-						}
-					}
-				}
-				app.update_values();
-			},
-			_ => {},
-		};
-	}
-
-	Ok(quit)
-}
-
-// TODO can this be made nicer?
-fn triggered(data: &[f64], index: usize, threshold: f64, depth: u32, falling_edge:bool) -> bool {
-	if data.len() < index + (1+depth as usize) { return false; }
-	if falling_edge {
-		if data[index] >= threshold {
-			for i in 1..=depth as usize {
-				if data[index+i] >= threshold {
-					return false;
-				}
-			}
-			return true;
-		} else {
-			return false;
-		}
-	} else {
-		if data[index] <= threshold {
-			for i in 1..=depth as usize {
-				if data[index+i] <= threshold {
-					return false;
-				}
-			}
-			return true;
-		} else {
-			return false;
-		}
-	}
-}
-
-fn data_set<'a>(
-		name: &'a str,
-		data: &'a [(f64, f64)],
-		marker_type: symbols::Marker,
-		graph_type: GraphType,
-		axis_color: Color
-) -> Dataset<'a> {
-	Dataset::default()
-		.name(name)
-		.marker(marker_type)
-		.graph_type(graph_type)
-		.style(Style::default().fg(axis_color))
-		.data(&data)
-}
-
-fn axis(app: &App, dim: Dimension) -> Axis {
-	let (name, bounds) = match dim {
-		Dimension::X => (&app.names.x, &app.bounds.x),
-		Dimension::Y => (&app.names.y, &app.bounds.y),
-	};
-	let mut a = Axis::default();
-	if app.cfg.show_ui {
-		a = a.title(Span::styled(name, Style::default().fg(Color::Cyan)));
-	}
-	a.style(Style::default().fg(app.cfg.axis_color)).bounds(*bounds)
-}
-
-fn channel_name(index: usize, vectorscope: bool) -> String {
-	if vectorscope { return format!("{}", index); }
-	match index {
-		0 => "L".into(),
-		1 => "R".into(),
-		_ => format!("{}", index),
-	}
-}

src/config.rs

@@ -1,61 +0,0 @@
-use tui::style::Color;
-
-// use crate::parser::SampleParser;
-
-pub enum Dimension {
-	X, Y
-}
-
-#[derive(Default)]
-pub struct ChartNames {
-	pub x: String,
-	pub y: String,
-}
-
-
-pub struct ChartBounds {
-	pub x: [f64;2],
-	pub y: [f64;2],
-}
-
-impl Default for ChartBounds {
-	fn default() -> Self {
-		ChartBounds { x: [0.0, 0.0], y: [0.0, 0.0] }
-	}
-}
-
-pub struct ChartReferences {
-	pub x: Vec<(f64, f64)>,
-	pub y: Vec<(f64, f64)>,
-}
-
-impl Default for ChartReferences {
-	fn default() -> Self {
-		ChartReferences {
-			x: vec![(0.0, 0.0), (0.0, 1.0)],
-			y: vec![(0.5, 1.0), (0.5, -1.0)]
-		}
-	}
-}
-
-pub struct AppConfig {
-	pub axis_color: Color,
-	pub palette: Vec<Color>,
-
-	pub scale: i32,
-	pub width: u32,
-	pub vectorscope: bool,
-	pub references: bool,
-	pub show_ui: bool,
-	pub peaks: bool,
-
-	pub triggering: bool,
-	pub threshold: f64,
-	pub depth: u32,
-	pub falling_edge: bool,
-
-	pub scatter: bool,
-	pub braille: bool,
-
-	pub pause: bool,
-}

src/display/mod.rs

@@ -0,0 +1,81 @@
+pub mod oscilloscope;
+pub mod vectorscope;
+pub mod spectroscope;
+
+use crossterm::event::Event;
+use tui::{widgets::{Dataset, Axis, GraphType}, style::{Style, Color}, symbols::Marker};
+
+pub enum Dimension {
+	X, Y
+}
+
+pub struct GraphConfig {
+	pub samples: u32,
+	pub scale: u32,
+	pub width: u32,
+	pub scatter: bool,
+	pub references: bool,
+	pub show_ui: bool,
+	pub marker_type: Marker,
+	pub palette: Vec<Color>,
+	pub labels_color: Color,
+	pub axis_color: Color,
+}
+
+impl GraphConfig {
+	pub fn palette(&self, index: usize) -> Color {
+		*self.palette.get(index % self.palette.len()).unwrap_or(&Color::White)
+	}
+}
+
+#[allow(clippy::ptr_arg)] // TODO temporarily! it's a shitty solution
+pub trait DisplayMode {
+	// MUST define
+	fn axis(&self, cfg: &GraphConfig, dimension: Dimension) -> Axis; // TODO simplify this
+	fn process(&self, cfg: &GraphConfig, data: &Vec<Vec<f64>>) -> Vec<DataSet>;
+
+	// SHOULD override
+	fn handle(&mut self, _event: Event) {}
+	fn channel_name(&self, index: usize) -> String { format!("{}", index) }
+	fn header(&self, _cfg: &GraphConfig) -> String { "".into() }
+	fn references(&self, cfg: &GraphConfig) -> Vec<DataSet> {
+		let half_width = cfg.samples as f64 / 2.0;
+		vec![
+			DataSet::new("".into(), vec![(0.0, 0.0), (cfg.width as f64, 0.0)], cfg.marker_type, GraphType::Line, cfg.axis_color),
+			DataSet::new("".into(), vec![(half_width, -(cfg.scale as f64)), (half_width, cfg.scale as f64)], cfg.marker_type, GraphType::Line, cfg.axis_color),
+
+		]
+	}
+}
+
+pub struct DataSet {
+	name: String,
+	data: Vec<(f64, f64)>,
+	marker_type: Marker,
+	graph_type: GraphType,
+	color: Color,
+}
+
+impl<'a> From::<&'a DataSet> for Dataset<'a> {
+	fn from(ds: &'a DataSet) -> Dataset<'a> {
+		Dataset::default()
+			.name(ds.name.clone())
+			.marker(ds.marker_type)
+			.graph_type(ds.graph_type)
+			.style(Style::default().fg(ds.color))
+			.data(&ds.data)
+		}
+}
+
+impl DataSet {
+	pub fn new(
+		name: String,
+		data: Vec<(f64, f64)>,
+		marker_type: Marker,
+		graph_type: GraphType,
+		color: Color
+	) -> Self {
+		DataSet { name, data, marker_type, graph_type, color }
+	}
+}
+

src/display/oscilloscope.rs

@@ -0,0 +1,149 @@
+use crossterm::event::{Event, KeyModifiers, KeyCode};
+use tui::{widgets::{Axis, GraphType}, style::Style, text::Span};
+
+use crate::app::update_value_f;
+
+use super::{DisplayMode, GraphConfig, DataSet, Dimension};
+
+pub struct Oscilloscope {
+	pub triggering: bool,
+	pub falling_edge: bool,
+	pub threshold: f64,
+	pub depth: u32,
+	pub peaks: bool,
+}
+
+impl DisplayMode for Oscilloscope {
+	fn channel_name(&self, index: usize) -> String {
+		match index {
+			0 => "L".into(),
+			1 => "R".into(),
+			_ => format!("{}", index),
+		}
+	}
+
+	fn header(&self, _: &GraphConfig) -> String {
+		if self.triggering {
+			format!(
+				"{} {:.0}{} trigger",
+				if self.falling_edge { "v" } else { "^" },
+				self.threshold,
+				if self.depth > 1 { format!(":{}", self.depth) } else { "".into() },
+			)
+		} else {
+			"live".into()
+		}
+	}
+
+	fn axis(&self, cfg: &GraphConfig, dimension: Dimension) -> Axis {
+		let (name, bounds) = match dimension {
+			Dimension::X => ("time -", [0.0, cfg.samples as f64]),
+			Dimension::Y => ("| amplitude", [-(cfg.scale as f64), cfg.scale as f64]),
+		};
+		let mut a = Axis::default();
+		if cfg.show_ui { // TODO don't make it necessary to check show_ui inside here
+			a = a.title(Span::styled(name, Style::default().fg(cfg.labels_color)));
+		}
+		a.style(Style::default().fg(cfg.axis_color)).bounds(bounds)
+	}
+
+	fn process(&self, cfg: &GraphConfig, data: &Vec<Vec<f64>>) -> Vec<DataSet> {
+		let mut out = Vec::new();
+
+		let mut trigger_offset = 0;
+		if self.triggering {
+			for i in 0..data[0].len() {
+				if triggered(&data[0], i, self.threshold, self.depth, self.falling_edge) { // triggered
+					break;
+				} else {
+					trigger_offset += 1;
+				}
+			}
+		}
+
+		if self.triggering {
+			out.push(DataSet::new("T".into(), vec![(0.0, self.threshold)], cfg.marker_type, GraphType::Scatter, cfg.labels_color));
+		}
+
+		for (n, channel) in data.iter().enumerate().rev() {
+			let (mut min, mut max) = (0.0, 0.0);
+			let mut tmp = Vec::new();
+			for (i, sample) in channel.iter().enumerate() {
+				if *sample < min { min = *sample };
+				if *sample > max { max = *sample };
+				if i >= trigger_offset {
+					tmp.push(((i - trigger_offset) as f64, *sample));
+				}
+			}
+
+			if self.peaks {
+				out.push(DataSet::new(
+					"".into(),
+					vec![(0.0, min), (0.0, max)],
+					cfg.marker_type,
+					GraphType::Scatter,
+					cfg.palette(n)
+				))
+			}
+
+			out.push(DataSet::new(
+				self.channel_name(n),
+				tmp,
+				cfg.marker_type,
+				if cfg.scatter { GraphType::Scatter } else { GraphType::Line },
+				cfg.palette(n),
+			));
+		}
+
+		out
+	}
+
+	fn handle(&mut self, event: Event) {
+		if let Event::Key(key) = event {
+			let magnitude = match key.modifiers {
+				KeyModifiers::SHIFT => 10.0,
+				KeyModifiers::CONTROL => 5.0,
+				KeyModifiers::ALT => 0.2,
+				_ => 1.0,
+			};
+			match key.code {
+				KeyCode::PageUp   => update_value_f(&mut self.threshold, 250.0, magnitude, 0.0..32768.0),
+				KeyCode::PageDown => update_value_f(&mut self.threshold, -250.0, magnitude, 0.0..32768.0),
+				KeyCode::Char('t') => self.triggering   = !self.triggering,
+				KeyCode::Char('e') => self.falling_edge = !self.falling_edge,
+				KeyCode::Char('p') => self.peaks        = !self.peaks,
+				KeyCode::Char('=') => self.depth       += 1,
+				KeyCode::Char('-') => self.depth       -= 1,
+				KeyCode::Char('+') => self.depth       += 10,
+				KeyCode::Char('_') => self.depth       -= 10,
+				_ => {}
+			}
+		}
+	}
+}
+
+// TODO can this be made nicer?
+fn triggered(data: &[f64], index: usize, threshold: f64, depth: u32, falling_edge:bool) -> bool {
+	if data.len() < index + (1+depth as usize) { return false; }
+	if falling_edge {
+		if data[index] >= threshold {
+			for i in 1..=depth as usize {
+				if data[index+i] >= threshold {
+					return false;
+				}
+			}
+			true
+		} else {
+			false
+		}
+	} else if data[index] <= threshold {
+		for i in 1..=depth as usize {
+			if data[index+i] <= threshold {
+				return false;
+			}
+		}
+		true
+	} else {
+		false
+	}
+}

src/display/spectroscope.rs

@@ -0,0 +1,53 @@
+use tui::{widgets::{Axis, GraphType}, style::Style, text::Span};
+
+use super::{DisplayMode, GraphConfig, DataSet, Dimension};
+
+use easyfft::prelude::*;
+
+pub struct Spectroscope {}
+
+impl DisplayMode for Spectroscope {
+	fn channel_name(&self, index: usize) -> String {
+		format!("{}", index)
+	}
+
+	fn header(&self, _: &GraphConfig) -> String {
+		"live".into()
+	}
+
+	fn axis(&self, cfg: &GraphConfig, dimension: Dimension) -> Axis {
+		let (name, bounds) = match dimension {
+			Dimension::X => ("frequency -", [-(cfg.scale as f64), cfg.scale as f64]),
+			Dimension::Y => ("| level", [-(cfg.scale as f64), cfg.scale as f64]),
+		};
+		let mut a = Axis::default();
+		if cfg.show_ui { // TODO don't make it necessary to check show_ui inside here
+			a = a.title(Span::styled(name, Style::default().fg(cfg.labels_color)));
+		}
+		a.style(Style::default().fg(cfg.axis_color)).bounds(bounds)
+	}
+
+	fn references(&self, cfg: &GraphConfig) -> Vec<DataSet> {
+		vec![
+			DataSet::new("".into(), vec![(0.0, 0.0), (20000.0, 0.0)], cfg.marker_type, GraphType::Line, cfg.axis_color), 
+			DataSet::new("".into(), vec![(0.0, 0.0), (0.0, cfg.scale as f64)], cfg.marker_type, GraphType::Line, cfg.axis_color),
+		]
+	}
+
+	fn process(&self, cfg: &GraphConfig, data: &Vec<Vec<f64>>) -> Vec<DataSet> {
+		let mut out = Vec::new();
+
+		for (n, chunk) in data.iter().enumerate() {
+			let tmp = chunk.real_fft().iter().map(|x| (x.re, x.im)).collect();
+			out.push(DataSet::new(
+				self.channel_name(n),
+				tmp,
+				cfg.marker_type,
+				if cfg.scatter { GraphType::Scatter } else { GraphType::Line },
+				cfg.palette(n),
+			));
+		}
+
+		out
+	}
+}

src/display/vectorscope.rs

@@ -0,0 +1,76 @@
+use tui::{widgets::{Axis, GraphType}, style::Style, text::Span};
+
+use super::{DisplayMode, GraphConfig, DataSet, Dimension};
+
+pub struct Vectorscope {}
+
+impl DisplayMode for Vectorscope {
+	fn channel_name(&self, index: usize) -> String {
+		format!("{}", index)
+	}
+
+	fn header(&self, _: &GraphConfig) -> String {
+		"live".into()
+	}
+
+	fn axis(&self, cfg: &GraphConfig, dimension: Dimension) -> Axis {
+		let (name, bounds) = match dimension {
+			Dimension::X => ("left -", [-(cfg.scale as f64), cfg.scale as f64]),
+			Dimension::Y => ("| right", [-(cfg.scale as f64), cfg.scale as f64]),
+		};
+		let mut a = Axis::default();
+		if cfg.show_ui { // TODO don't make it necessary to check show_ui inside here
+			a = a.title(Span::styled(name, Style::default().fg(cfg.labels_color)));
+		}
+		a.style(Style::default().fg(cfg.axis_color)).bounds(bounds)
+	}
+
+	fn references(&self, cfg: &GraphConfig) -> Vec<DataSet> {
+		vec![
+			DataSet::new("".into(), vec![(-(cfg.scale as f64), 0.0), (cfg.scale as f64, 0.0)], cfg.marker_type, GraphType::Line, cfg.axis_color), 
+			DataSet::new("".into(), vec![(0.0, -(cfg.scale as f64)), (0.0, cfg.scale as f64)], cfg.marker_type, GraphType::Line, cfg.axis_color),
+		]
+	}
+
+	fn process(&self, cfg: &GraphConfig, data: &Vec<Vec<f64>>) -> Vec<DataSet> {
+		let mut out = Vec::new();
+
+		for (n, chunk) in data.chunks(2).enumerate() {
+			let mut tmp = vec![];
+			match chunk.len() {
+				2 => {
+					for i in 0..std::cmp::min(chunk[0].len(), chunk[1].len()) {
+						if i > cfg.samples as usize { break }
+						tmp.push((chunk[0][i], chunk[1][i]));
+					}
+				},
+				1 => {
+					for i in 0..chunk[0].len() {
+						if i > cfg.samples as usize { break }
+						tmp.push((chunk[0][i], i as f64));
+					}
+				},
+				_ => continue,
+			}
+			// split it in two for easier coloring
+			// TODO configure splitting in multiple parts?
+			let pivot = tmp.len() / 2;
+			out.push(DataSet::new(
+				self.channel_name((n * 2) + 1),
+				tmp[pivot..].to_vec(),
+				cfg.marker_type,
+				if cfg.scatter { GraphType::Scatter } else { GraphType::Line },
+				cfg.palette((n * 2) + 1),
+			));
+			out.push(DataSet::new(
+				self.channel_name(n * 2),
+				tmp[..pivot].to_vec(),
+				cfg.marker_type,
+				if cfg.scatter { GraphType::Scatter } else { GraphType::Line },
+				cfg.palette(n * 2),
+			));
+		}
+
+		out
+	}
+}

src/main.rs

@@ -1,9 +1,11 @@
 mod parser;
 mod app;
-mod config;
 mod music;
 mod source;
+mod display;
 
+use app::App;
+use source::PulseAudioSimple;
 use tui::{
 	backend::CrosstermBackend,
 	Terminal,
@@ -17,7 +19,6 @@ use crossterm::{
 use clap::Parser;
 
 use crate::music::Note;
-use crate::app::run_app;
 
 const HELP_TEMPLATE : &str = "{before-help}\
 {name} {version} -- by {author}
@@ -41,7 +42,7 @@ pub struct Args {
 
 	/// Max value, positive and negative, on amplitude scale
 	#[arg(short, long, value_name = "SIZE", default_value_t = 20000)]
-	range: i32, // TODO counterintuitive, improve this
+	range: u32, // TODO counterintuitive, improve this
 
 	/// Use vintage looking scatter mode instead of line mode
 	#[arg(long, default_value_t = false)]
@@ -52,7 +53,7 @@ pub struct Args {
 	vectorscope: bool,
 
 	/// Show peaks for each channel as dots
-	#[arg(long, default_value_t = false)]
+	#[arg(long, default_value_t = true)]
 	show_peaks: bool,
 
 	/// Tune buffer size to be in tune with given note (overrides buffer option)
@@ -114,6 +115,16 @@ fn main() -> Result<(), std::io::Error> {
 		}
 	}
 
+	let source = PulseAudioSimple::new(
+		args.device.as_deref(),
+		args.channels,
+		args.sample_rate,
+		args.buffer,
+		args.server_buffer
+	).unwrap();
+
+	let mut app = App::from(&args);
+
 	// setup terminal
 	enable_raw_mode()?;
 	let mut stdout = std::io::stdout();
@@ -122,7 +133,7 @@ fn main() -> Result<(), std::io::Error> {
 	let mut terminal = Terminal::new(backend)?;
 	terminal.hide_cursor()?;
 
-	let res = run_app(args, &mut terminal);
+	let res = app.run(source, &mut terminal);
 
 	// restore terminal
 	disable_raw_mode()?;

src/source.rs

@@ -1,4 +1,4 @@
-use libpulse_binding::{stream::Direction, sample::{Spec, Format}, def::BufferAttr, error::{PAErr, Code}};
+use libpulse_binding::{sample::{Spec, Format}, def::BufferAttr, error::PAErr, stream::Direction};
 use libpulse_simple_binding::Simple;
 
 pub trait DataSource {