noest 0.1.0

Tool to estimate noise in a video and output the results, optionally as ISO for use with photon noise in AV1 encoding.
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///
/// I totally did not stole this from ssimulacra2_bin
/// 


use std::time::Duration;

use indicatif::{ProgressStyle, ProgressState, HumanDuration};


pub const PROGRESS_CHARS: &str = "█▉▊▋▌▍▎▏  ";
pub const INDICATIF_PROGRESS_TEMPLATE: &str = if cfg!(windows) {
    // Do not use a spinner on Windows since the default console cannot display
    // the characters used for the spinner
    "{elapsed_precise:.bold} ▕{wide_bar:.blue/white.dim}▏ {percent:.bold}  {pos} ({fps:.bold}, eta {fixed_eta}{msg})"
} else {
    "{spinner:.green.bold} {elapsed_precise:.bold} ▕{wide_bar:.blue/white.dim}▏ {percent:.bold}  {pos} ({fps:.bold}, eta {fixed_eta}{msg})"
};

pub const INDICATIF_SPINNER_TEMPLATE: &str = if cfg!(windows) {
    // Do not use a spinner on Windows since the default console cannot display
    // the characters used for the spinner
    "{elapsed_precise:.bold} {pos} ({fps:.bold}{msg})"
} else {
    "{spinner:.green.bold} {elapsed_precise:.bold} {pos} ({fps:.bold}{msg})"
};

pub fn pretty_progress_style() -> ProgressStyle {
    ProgressStyle::default_bar()
        .template(INDICATIF_PROGRESS_TEMPLATE)
        .unwrap()
        .with_key(
            "fps",
            |state: &ProgressState, w: &mut dyn std::fmt::Write| {
                if state.pos() == 0 || state.elapsed().as_secs_f32() < f32::EPSILON {
                    write!(w, "0 fps").unwrap();
                } else {
                    let fps = state.pos() as f32 / state.elapsed().as_secs_f32();
                    if fps < 1.0 {
                        write!(w, "{:.2} s/fr", 1.0 / fps).unwrap();
                    } else {
                        write!(w, "{:.2} fps", fps).unwrap();
                    }
                }
            },
        )
        .with_key(
            "fixed_eta",
            |state: &ProgressState, w: &mut dyn std::fmt::Write| {
                if state.pos() == 0 || state.elapsed().as_secs_f32() < f32::EPSILON {
                    write!(w, "unknown").unwrap();
                } else {
                    let spf = state.elapsed().as_secs_f32() / state.pos() as f32;
                    let remaining = state.len().unwrap_or(0) - state.pos();
                    write!(
                        w,
                        "{:#}",
                        HumanDuration(Duration::from_secs_f32(spf * remaining as f32))
                    )
                    .unwrap();
                }
            },
        )
        .with_key(
            "pos",
            |state: &ProgressState, w: &mut dyn std::fmt::Write| {
                write!(w, "{}/{}", state.pos(), state.len().unwrap_or(0)).unwrap();
            },
        )
        .with_key(
            "percent",
            |state: &ProgressState, w: &mut dyn std::fmt::Write| {
                write!(w, "{:>3.0}%", state.fraction() * 100_f32).unwrap();
            },
        )
        .progress_chars(PROGRESS_CHARS)
}

pub fn pretty_spinner_style() -> ProgressStyle {
    ProgressStyle::default_bar()
        .template(INDICATIF_SPINNER_TEMPLATE)
        .unwrap()
        .with_key(
            "fps",
            |state: &ProgressState, w: &mut dyn std::fmt::Write| {
                if state.pos() == 0 || state.elapsed().as_secs_f32() < f32::EPSILON {
                    write!(w, "0 fps").unwrap();
                } else {
                    let fps = state.pos() as f32 / state.elapsed().as_secs_f32();
                    if fps < 1.0 {
                        write!(w, "{:.2} s/fr", 1.0 / fps).unwrap();
                    } else {
                        write!(w, "{:.2} fps", fps).unwrap();
                    }
                }
            },
        )
        .with_key(
            "pos",
            |state: &ProgressState, w: &mut dyn std::fmt::Write| {
                write!(w, "{}", state.pos()).unwrap();
            },
        )
        .progress_chars(PROGRESS_CHARS)
}