Function quality_to_mse

src/quant.rs:466–473

(quality: u8)

}

pub(crate) fn quality_to_mse(quality: u8) -> f64 {
    if quality == 0 {
        return 1e20; // + epsilon for floating point errors
    }
    if quality >= 100 { return 0.; }
    let extra_low_quality_fudge = (0.016 / (0.001 + f64::from(quality)) - 0.001).max(0.);
    LIQ_WEIGHT_MSE * (extra_low_quality_fudge + 2.5 / (210. + f64::from(quality)).powf(1.2) * (100.1 - f64::from(quality)) / 100.)
}

pub(crate) fn mse_to_quality(mse: f64) -> u8 {
    for i in (1..101).rev() {