made more functional'n shit
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parent
5ffe22ce17
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3d7f17723c
237
src/main.rs
237
src/main.rs
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@ -1,4 +1,7 @@
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use serial::SerialPort;
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use std::io::BufRead;
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use std::io::BufReader;
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use std::io::Result as IoResult;
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use walkdir::WalkDir;
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fn main() {
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@ -39,8 +42,10 @@ fn main() {
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match entry {
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Err(e) => eprintln!("error when reading music dir, continuing: {:?}", e),
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Ok(entry) => {
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if entry.file_type().is_file() && entry.path().extension() != Some(std::ffi::OsStr::new("jpg")){
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music.push(entry.path().to_owned());
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if entry.file_type().is_file()
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&& entry.path().extension() != Some(std::ffi::OsStr::new("jpg"))
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{
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music.push(Some(entry.path().to_owned()));
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}
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}
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}
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@ -52,27 +57,6 @@ fn main() {
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music.shuffle(&mut rng);
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println!("loaded {} \"songs\"", music.len());
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/*
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for i in (0..music.len()).rev() {
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enum Err{
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Empty,
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File,
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}
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let c = || -> Result<(), Err> {
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// we might run out of music cause we are deliting inline, this is fine.
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let choice = &music.get(i).ok_or(Err::Empty)?;
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let f = std::fs::File::open(&choice).map_err(|_| Err::File)?;
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let rdr = BufReader::new(f);
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let _d = rodio::Decoder::new(rdr).map_err(|_| Err::File)?;
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Ok(())
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};
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match (c)() {
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Err(Err::File) => {dbg!(music.remove(i));},
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_ => (),
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}
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}
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*/
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println!("checked all songs");
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println!("opening audio output");
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let (_stream, stream_handle) = rodio::OutputStream::try_default()
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@ -80,67 +64,168 @@ fn main() {
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let mut sink = rodio::Sink::try_new(&stream_handle).expect("could not create sink");
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println!("audio output opened");
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use std::io::BufRead;
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use std::io::BufReader;
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let mut port = BufReader::new(port);
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#[derive(Clone, Copy)]
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struct Hyst {
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max: usize,
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prechoice: usize,
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/// value when the choice was last changed
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prechoice_val: usize,
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/// value of last read
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preval: usize,
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/// number of times the same (but changed) value has been read
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stability: usize,
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}
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// wage has valid range 0-5000
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let mut max: usize = 5000;
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let mut preval = 0;
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let mut prechoice = 0;
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let mut readbuf = String::new();
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let mut n_changed = 0;
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let equality_range = 1;
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let stability_tresh = 7;
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use std::io::Write;
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port.get_mut().write(b"r").unwrap();
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let hyst = Hyst {
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// wage has valid range 0-5000
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max: 5000,
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prechoice: 0,
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prechoice_val: 0,
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preval: 0,
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stability: 0,
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};
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loop {
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readbuf.clear();
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port.read_line(&mut readbuf).unwrap();
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//println!("got line: {}", readbuf);
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let err = "got invalid message from wage";
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let w: usize = readbuf.trim().parse().expect(err);
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if w == 8888 || w == 69_69_69_69 {
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// special values: 8888 and 69696969
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// are turned off and EEEE
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} else {
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max = max.max(w);
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let choice = (w * (music.len() - 1)) / max;
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let absdiff = w.max(preval) - w.min(preval);
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if absdiff > 1 && choice != prechoice {
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n_changed += 1;
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} else {
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n_changed = 0;
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}
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if n_changed >= 7 {
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let choicef = &music[(music.len() - 1) - choice];
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println!("changing song to {:?}", choicef);
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let mut c = || -> Result<(), ()> {
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let f = std::fs::File::open(choicef).map_err(|_| ())?;
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let rdr = BufReader::new(f);
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let d = rodio::Decoder::new(rdr).map_err(|_| ())?;
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//let s = rodio::source::SineWave::new(440);
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let newsink =
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rodio::Sink::try_new(&stream_handle).expect("could not create sink");
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newsink.append(d);
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let musiclen = music.len();
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sink.stop();
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sink = newsink;
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Ok(())
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};
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if let Err(_error) = (c)() {
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println!("music was not music");
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let r = music.remove((music.len() - 1) - choice);
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println!("removed {:?}", r);
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let read_delay = std::time::Duration::from_millis(100);
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// first remove noise
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let iter = PortIter::new(port, read_delay)
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.unwrap()
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.map(|e| e.unwrap())
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.scan(hyst, |hyst, el| {
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hyst.max = hyst.max.max(el);
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let absdiff = el.max(hyst.prechoice_val) - el.min(hyst.prechoice_val);
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if absdiff > equality_range {
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if hyst.preval == el {
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hyst.stability += 1;
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} else {
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preval = w;
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prechoice = choice;
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n_changed = 0;
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hyst.stability = 0;
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}
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if hyst.stability > stability_tresh {
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let choice = (el * (musiclen - 1)) / hyst.max;
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if choice != hyst.prechoice {
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hyst.prechoice = choice;
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hyst.stability = 0;
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hyst.preval = el;
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return Some(Some((el, hyst.max)));
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}
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}
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}
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Some(None)
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});
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// next: turn de-noised into a decoder
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let iter = iter
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// skip thing the denoiser denoised
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.flatten()
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.map(|(e, max)| {
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let decoder;
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// re-run until we hit actually valid music files
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loop {
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let base = (e * (music.len() - 1)) / max;
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let mut delta: isize = 0;
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let choicef;
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let choice;
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// search for non-deleted paths in a cyclic pattern around base choice
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// (0, -1, 1, -2, 2...)
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loop {
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let modchoice = if delta > 0 {
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let c = base + (delta as usize);
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delta = -delta;
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c
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} else {
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let c = base - (delta as usize);
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delta = (-delta) + 1;
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c
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};
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if let Some(Some(c)) = music.get(modchoice) {
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choicef = c;
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choice = modchoice;
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break;
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}
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}
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// try to decode
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let c = || -> Result<rodio::Decoder<_>, ()> {
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let f = std::fs::File::open(choicef).map_err(|_| ())?;
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let rdr = BufReader::new(f);
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rodio::Decoder::new(rdr).map_err(|_| ())
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};
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match (c)() {
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Ok(d) => {
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decoder = d;
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break;
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}
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Err(()) => {
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eprintln!("{:?} was not actually music", choicef);
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music[choice] = None;
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}
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}
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}
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decoder
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});
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// now just play the decoder
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for decoder in iter {
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let newsink = rodio::Sink::try_new(&stream_handle).expect("could not create sink");
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newsink.append(decoder);
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std::thread::sleep(std::time::Duration::from_millis(100));
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port.get_mut().write(b"r").unwrap();
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sink.stop();
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sink = newsink;
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}
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}
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#[derive(Debug)]
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enum PortIterErr {
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Io(std::io::Error),
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Parse(std::num::ParseIntError),
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}
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impl From<std::io::Error> for PortIterErr {
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fn from(e: std::io::Error) -> Self {
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Self::Io(e)
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}
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}
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impl From<std::num::ParseIntError> for PortIterErr {
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fn from(e: std::num::ParseIntError) -> Self {
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Self::Parse(e)
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}
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}
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struct PortIter<S: SerialPort> {
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port: BufReader<S>,
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delay: std::time::Duration,
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}
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impl<S: SerialPort> PortIter<S> {
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fn new(mut p: S, delay: std::time::Duration) -> IoResult<Self> {
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p.write_all(b"r")?;
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Ok(Self {
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port: BufReader::new(p),
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delay,
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})
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}
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}
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impl<S: SerialPort> Iterator for PortIter<S> {
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type Item = Result<usize, PortIterErr>;
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fn next(&mut self) -> Option<Result<usize, PortIterErr>> {
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let mut buf = String::new();
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let r = self.port.read_line(&mut buf);
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match r {
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Ok(0) => return None,
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Err(e) => return Some(Result::Err(e.into())),
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Ok(_) => (),
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};
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let num = match buf.parse::<usize>() {
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Err(e) => return Some(Result::Err(e.into())),
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Ok(num) => num,
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};
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match self.port.get_mut().write_all(b"r") {
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Ok(_) => (),
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Err(e) => return Some(Result::Err(e.into())),
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}
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std::thread::sleep(self.delay);
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Some(Result::Ok(num))
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}
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}
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