j2k-native 0.7.0

Pure-Rust JPEG 2000 and HTJ2K codec engine for j2k
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// SPDX-License-Identifier: MIT OR Apache-2.0

//! Shared MQ arithmetic-coder probability table (ITU-T T.800 Table C.2).

/// QE table entry for the MQ coder.
#[derive(Debug, Clone, Copy)]
pub(crate) struct QeData {
    /// Probability estimate.
    pub(crate) qe: u32,
    /// Next state after an MPS event.
    pub(crate) nmps: u8,
    /// Next state after an LPS event.
    pub(crate) nlps: u8,
    /// Whether an LPS event switches the MPS bit.
    pub(crate) switch: bool,
}

macro_rules! qe {
    ($($qe:expr, $nmps:expr, $nlps:expr, $switch:expr),+ $(,)?) => {
        [$(QeData { qe: $qe, nmps: $nmps, nlps: $nlps, switch: $switch }),+]
    };
}

/// QE values and state transitions from Table C.2.
#[rustfmt::skip]
pub(crate) static QE_TABLE: [QeData; 47] = qe!(
    0x5601, 1, 1, true,
    0x3401, 2, 6, false,
    0x1801, 3, 9, false,
    0x0AC1, 4, 12, false,
    0x0521, 5, 29, false,
    0x0221, 38, 33, false,
    0x5601, 7, 6, true,
    0x5401, 8, 14, false,
    0x4801, 9, 14, false,
    0x3801, 10, 14, false,
    0x3001, 11, 17, false,
    0x2401, 12, 18, false,
    0x1C01, 13, 20, false,
    0x1601, 29, 21, false,
    0x5601, 15, 14, true,
    0x5401, 16, 14, false,
    0x5101, 17, 15, false,
    0x4801, 18, 16, false,
    0x3801, 19, 17, false,
    0x3401, 20, 18, false,
    0x3001, 21, 19, false,
    0x2801, 22, 19, false,
    0x2401, 23, 20, false,
    0x2201, 24, 21, false,
    0x1C01, 25, 22, false,
    0x1801, 26, 23, false,
    0x1601, 27, 24, false,
    0x1401, 28, 25, false,
    0x1201, 29, 26, false,
    0x1101, 30, 27, false,
    0x0AC1, 31, 28, false,
    0x09C1, 32, 29, false,
    0x08A1, 33, 30, false,
    0x0521, 34, 31, false,
    0x0441, 35, 32, false,
    0x02A1, 36, 33, false,
    0x0221, 37, 34, false,
    0x0141, 38, 35, false,
    0x0111, 39, 36, false,
    0x0085, 40, 37, false,
    0x0049, 41, 38, false,
    0x0025, 42, 39, false,
    0x0015, 43, 40, false,
    0x0009, 44, 41, false,
    0x0005, 45, 42, false,
    0x0001, 45, 43, false,
    0x5601, 46, 46, false,
);