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https://github.com/alemidev/scope-tui.git
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feat: allow tuning to musical notes
This commit is contained in:
parent
e83a326c89
commit
16c4fc3810
2 changed files with 93 additions and 3 deletions
24
src/main.rs
24
src/main.rs
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@ -1,7 +1,8 @@
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mod parser;
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mod app;
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mod music;
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use std::{io::{self, ErrorKind}, time::{Duration, SystemTime}};
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use std::{io::{self, ErrorKind}, time::{Duration, Instant}};
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use tui::{
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backend::{CrosstermBackend, Backend},
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widgets::{Block, Chart, Axis, Dataset, GraphType},
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@ -23,6 +24,7 @@ use clap::Parser;
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use parser::{SampleParser, Signed16PCM};
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use crate::app::App;
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use crate::music::Note;
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/// A simple oscilloscope/vectorscope for your terminal
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#[derive(Parser, Debug)]
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@ -47,10 +49,18 @@ struct Args {
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#[arg(long, default_value_t = false)]
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vectorscope: bool,
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/// Tune buffer size to be in tune with given note (overrides buffer option)
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#[arg(long)]
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tune: Option<Note>,
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/// Sample rate to use
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#[arg(long, default_value_t = 44100)]
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sample_rate: u32,
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/// Pulseaudio server buffer size, in block number
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#[arg(long, default_value_t = 32)]
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server_buffer: u32,
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/// Don't draw reference line
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#[arg(long, default_value_t = false)]
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no_reference: bool,
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@ -86,6 +96,15 @@ fn data_set<'a>(
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fn main() -> Result<(), io::Error> {
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let mut args = Args::parse();
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if let Some(note) = &args.tune { // TODO make it less jank
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if note != &Note::INVALID {
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args.buffer = note.tune_buffer_size(0, args.sample_rate);
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while args.buffer % 4 != 0 {
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args.buffer += 1; // TODO jank but otherwise it doesn't align
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}
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}
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}
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// setup terminal
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enable_raw_mode()?;
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let mut stdout = io::stdout();
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@ -113,7 +132,6 @@ fn main() -> Result<(), io::Error> {
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Ok(())
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}
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fn run_app<T : Backend>(args: Args, terminal: &mut Terminal<T>) -> Result<(), io::Error> {
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// prepare globals
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let mut buffer : Vec<u8> = vec![0; args.buffer as usize];
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@ -144,7 +162,7 @@ fn run_app<T : Backend>(args: Args, terminal: &mut Terminal<T>) -> Result<(), io
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&spec, // Our sample format
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None, // Use default channel map
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Some(&BufferAttr {
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maxlength: 32 * args.buffer,
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maxlength: args.server_buffer * args.buffer,
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fragsize: args.buffer,
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..Default::default()
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}),
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72
src/music.rs
Normal file
72
src/music.rs
Normal file
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@ -0,0 +1,72 @@
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#[derive(Debug, PartialEq, Clone)]
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pub enum Note {
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C, Db, D, Eb, E, F, Gb, G, Ab, A, Bb, B,
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INVALID
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}
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impl From::<String> for Note {
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fn from(txt: String) -> Self {
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match txt.as_str() {
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"C" => Note::C,
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"Db" => Note::Db,
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"D" => Note::D,
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"Eb" => Note::Eb,
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"E" => Note::E,
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"F" => Note::F,
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"Gb" => Note::Gb,
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"G" => Note::G,
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"Ab" => Note::Ab,
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"A" => Note::A,
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"Bb" => Note::Bb,
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"B" => Note::B,
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_ => Note::INVALID,
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}
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}
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}
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impl Note {
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pub fn freq(&self, octave: u32) -> f32 {
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match octave {
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0 => match self {
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Note::C => 16.35,
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Note::Db => 17.32,
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Note::D => 18.35,
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Note::Eb => 19.45,
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Note::E => 20.60,
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Note::F => 21.83,
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Note::Gb => 23.12,
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Note::G => 24.50,
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Note::Ab => 25.96,
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Note::A => 27.50,
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Note::Bb => 29.14,
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Note::B => 30.87,
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Note::INVALID => 0.0,
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},
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_ => {
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let mut freq = self.freq(0);
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for _ in 0..octave {
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freq *= 2.0;
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}
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freq
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}
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}
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}
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// pub fn all() -> Vec<Note> {
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// vec![Note::C, Note::Db, Note::D, Note::Eb, Note::E, Note::F, Note::Gb, Note::G, Note::Ab, Note::A, Note::Bb, Note::B]
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// }
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pub fn tune_buffer_size(&self, octave:u32, sample_rate: u32) -> u32 {
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let t = 1.0 / self.freq(octave); // periodo ?
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let buf = (sample_rate as f32) * t;
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return (buf * 4.0).round() as u32;
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}
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// pub fn tune_sample_rate(&self, octave:u32, buffer_size: u32) -> u32 {
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// // TODO does it just work the same way?
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// let t = 1.0 / self.freq(octave); // periodo ?
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// let buf = (buffer_size as f32) * t;
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// return (buf * 4.0).round() as u32;
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// }
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}
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