zenavif 0.1.6

Pure Rust AVIF image codec powered by rav1d and zenravif
Documentation 
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use std::fs;
use zenpixels::PixelDescriptor;

fn main() {
    let path = std::env::args()
        .nth(1)
        .expect("usage: inspect_pixels <avif-path>");
    let data = fs::read(&path).unwrap();
    let config = zenavif::DecoderConfig::new().threads(1);
    let img = zenavif::decode_with(&data, &config, &zenavif::Unstoppable).unwrap();

    let desc = img.descriptor();
    if desc.layout_compatible(PixelDescriptor::RGB8) {
        let buf = img.try_as_imgref::<rgb::Rgb<u8>>().unwrap();
        println!("RGB8 {}x{}", buf.width(), buf.height());
        for y in 0..3.min(buf.height()) {
            for x in 0..3.min(buf.width()) {
                let px = buf.rows().nth(y).unwrap()[x];
                print!("({},{},{}) ", px.r, px.g, px.b);
            }
            println!();
        }
        let (mut sr, mut sg, mut sb) = (0u64, 0u64, 0u64);
        let mut count = 0u64;
        for row in buf.rows() {
            for px in row {
                sr += px.r as u64;
                sg += px.g as u64;
                sb += px.b as u64;
                count += 1;
            }
        }
        println!(
            "Mean: R={:.1} G={:.1} B={:.1}",
            sr as f64 / count as f64,
            sg as f64 / count as f64,
            sb as f64 / count as f64
        );
    } else if desc.layout_compatible(PixelDescriptor::RGBA8) {
        let buf = img.try_as_imgref::<rgb::Rgba<u8>>().unwrap();
        println!("RGBA8 {}x{}", buf.width(), buf.height());
        for y in 0..3.min(buf.height()) {
            for x in 0..3.min(buf.width()) {
                let px = buf.rows().nth(y).unwrap()[x];
                print!("({},{},{},{}) ", px.r, px.g, px.b, px.a);
            }
            println!();
        }
        let (mut sr, mut sg, mut sb) = (0u64, 0u64, 0u64);
        let mut count = 0u64;
        for row in buf.rows() {
            for px in row {
                sr += px.r as u64;
                sg += px.g as u64;
                sb += px.b as u64;
                count += 1;
            }
        }
        println!(
            "Mean: R={:.1} G={:.1} B={:.1}",
            sr as f64 / count as f64,
            sg as f64 / count as f64,
            sb as f64 / count as f64
        );
    } else {
        println!("Other format: {:?}", desc);
    }
}