/*
    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2026 metamuffin <metamuffin.org>
*/

pub fn av1_codec_param(cp: &[u8]) -> String {
    let profile = (cp[1] >> 5) & 0b111;
    let level = cp[1] & 0b11111;
    let tier = (cp[2] >> 7) & 0b1;
    let high_bitdepth = (cp[2] >> 6) & 0b1;
    let twelve_bit = (cp[2] >> 5) & 0b1;
    let _monochrome = (cp[2] >> 4) & 0b1;
    let _css_x = (cp[2] >> 3) & 0b1;
    let _css_y = (cp[2] >> 2) & 0b1;
    let _css_pos = cp[2] & 0b11;

    let tier_char = if tier == 1 { 'H' } else { 'M' };
    let bit_depth = if twelve_bit == 1 {
        12
    } else if high_bitdepth == 1 {
        10
    } else {
        0
    };
    format!(
        "av01.{profile}.{level:02}{tier_char}.{bit_depth:02}" // .{monochrome}.{css_x}{css_y}{css_pos}
    )
}

#[test]
fn sample1() {
    assert_eq!(av1_codec_param(&[0x81, 0x04, 0x4E]), "av01.0.04M.10");
}
#[test]
fn sample2() {
    assert_eq!(av1_codec_param(&[0x81, 0x35, 0xF4]), "av01.1.21H.12");
}