//! Port of `silk/tables_pulses_per_block.c` (Opus/SILK).
//! Source: https://gitlab.xiph.org/xiph/opus/-/blob/v1.5.2/silk/tables_pulses_per_block.c
//! Values copied verbatim; see the upstream license header for provenance.
//!
//! These tables are used by the shell coder and related entropy
//! decoding routines.
#[rustfmt::skip]
pub static SILK_MAX_PULSES_TABLE: [u8; 4] =
[ 8, 10, 12, 16];
#[rustfmt::skip]
pub static SILK_PULSES_PER_BLOCK_ICDF: [[u8; 18]; 10] =
[
[125, 51, 26, 18, 15, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0],
[198, 105, 45, 22, 15, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0],
[213, 162, 116, 83, 59, 43, 32, 24, 18, 15, 12, 9, 7, 6, 5, 3, 2, 0],
[239, 187, 116, 59, 28, 16, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0],
[250, 229, 188, 135, 86, 51, 30, 19, 13, 10, 8, 6, 5, 4, 3, 2, 1, 0],
[249, 235, 213, 185, 156, 128, 103, 83, 66, 53, 42, 33, 26, 21, 17, 13, 10, 0],
[254, 249, 235, 206, 164, 118, 77, 46, 27, 16, 10, 7, 5, 4, 3, 2, 1, 0],
[255, 253, 249, 239, 220, 191, 156, 119, 85, 57, 37, 23, 15, 10, 6, 4, 2, 0],
[255, 253, 251, 246, 237, 223, 203, 179, 152, 124, 98, 75, 55, 40, 29, 21, 15, 0],
[255, 254, 253, 247, 220, 162, 106, 67, 42, 28, 18, 12, 9, 6, 4, 3, 2, 0],
];
#[rustfmt::skip]
pub static SILK_PULSES_PER_BLOCK_BITS_Q5: [[u8; 18]; 9] =
[
[ 31, 57, 107, 160, 205, 205, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
[ 69, 47, 67, 111, 166, 205, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
[ 82, 74, 79, 95, 109, 128, 145, 160, 173, 205, 205, 205, 224, 255, 255, 224, 255, 224],
[125, 74, 59, 69, 97, 141, 182, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
[173, 115, 85, 73, 76, 92, 115, 145, 173, 205, 224, 224, 255, 255, 255, 255, 255, 255],
[166, 134, 113, 102, 101, 102, 107, 118, 125, 138, 145, 155, 166, 182, 192, 192, 205, 150],
[224, 182, 134, 101, 83, 79, 85, 97, 120, 145, 173, 205, 224, 255, 255, 255, 255, 255],
[255, 224, 192, 150, 120, 101, 92, 89, 93, 102, 118, 134, 160, 182, 192, 224, 224, 224],
[255, 224, 224, 182, 155, 134, 118, 109, 104, 102, 106, 111, 118, 131, 145, 160, 173, 131],
];
#[rustfmt::skip]
pub static SILK_RATE_LEVELS_ICDF: [[u8; 9]; 2] =
[
[241, 190, 178, 132, 87, 74, 41, 14, 0],
[223, 193, 157, 140, 106, 57, 39, 18, 0],
];
#[rustfmt::skip]
pub static SILK_RATE_LEVELS_BITS_Q5: [[u8; 9]; 2] =
[
[131, 74, 141, 79, 80, 138, 95, 104, 134],
[ 95, 99, 91, 125, 93, 76, 123, 115, 123],
];
#[rustfmt::skip]
pub static SILK_SHELL_CODE_TABLE0: [u8; 152] =
[128, 0, 214, 42, 0, 235, 128, 21, 0, 244, 184, 72, 11, 0, 248, 214, 128, 42, 7, 0, 248, 225, 170, 80, 25, 5, 0, 251, 236, 198, 126, 54, 18, 3, 0, 250, 238, 211, 159, 82, 35, 15, 5, 0, 250, 231, 203, 168, 128, 88, 53, 25, 6, 0, 252, 238, 216, 185, 148, 108, 71, 40, 18, 4, 0, 253, 243, 225, 199, 166, 128, 90, 57, 31, 13, 3, 0, 254, 246, 233, 212, 183, 147, 109, 73, 44, 23, 10, 2, 0, 255, 250, 240, 223, 198, 166, 128, 90, 58, 33, 16, 6, 1, 0, 255, 251, 244, 231, 210, 181, 146, 110, 75, 46, 25, 12, 5, 1, 0, 255, 253, 248, 238, 221, 196, 164, 128, 92, 60, 35, 18, 8, 3, 1, 0, 255, 253, 249, 242, 229, 208, 180, 146, 110, 76, 48, 27, 14, 7, 3, 1, 0];
#[rustfmt::skip]
pub static SILK_SHELL_CODE_TABLE1: [u8; 152] =
[129, 0, 207, 50, 0, 236, 129, 20, 0, 245, 185, 72, 10, 0, 249, 213, 129, 42, 6, 0, 250, 226, 169, 87, 27, 4, 0, 251, 233, 194, 130, 62, 20, 4, 0, 250, 236, 207, 160, 99, 47, 17, 3, 0, 255, 240, 217, 182, 131, 81, 41, 11, 1, 0, 255, 254, 233, 201, 159, 107, 61, 20, 2, 1, 0, 255, 249, 233, 206, 170, 128, 86, 50, 23, 7, 1, 0, 255, 250, 238, 217, 186, 148, 108, 70, 39, 18, 6, 1, 0, 255, 252, 243, 226, 200, 166, 128, 90, 56, 30, 13, 4, 1, 0, 255, 252, 245, 231, 209, 180, 146, 110, 76, 47, 25, 11, 4, 1, 0, 255, 253, 248, 237, 219, 194, 163, 128, 93, 62, 37, 19, 8, 3, 1, 0, 255, 254, 250, 241, 226, 205, 177, 145, 111, 79, 51, 30, 15, 6, 2, 1, 0];
#[rustfmt::skip]
pub static SILK_SHELL_CODE_TABLE2: [u8; 152] =
[129, 0, 203, 54, 0, 234, 129, 23, 0, 245, 184, 73, 10, 0, 250, 215, 129, 41, 5, 0, 252, 232, 173, 86, 24, 3, 0, 253, 240, 200, 129, 56, 15, 2, 0, 253, 244, 217, 164, 94, 38, 10, 1, 0, 253, 245, 226, 189, 132, 71, 27, 7, 1, 0, 253, 246, 231, 203, 159, 105, 56, 23, 6, 1, 0, 255, 248, 235, 213, 179, 133, 85, 47, 19, 5, 1, 0, 255, 254, 243, 221, 194, 159, 117, 70, 37, 12, 2, 1, 0, 255, 254, 248, 234, 208, 171, 128, 85, 48, 22, 8, 2, 1, 0, 255, 254, 250, 240, 220, 189, 149, 107, 67, 36, 16, 6, 2, 1, 0, 255, 254, 251, 243, 227, 201, 166, 128, 90, 55, 29, 13, 5, 2, 1, 0, 255, 254, 252, 246, 234, 213, 183, 147, 109, 73, 43, 22, 10, 4, 2, 1, 0];
#[rustfmt::skip]
pub static SILK_SHELL_CODE_TABLE3: [u8; 152] =
[130, 0, 200, 58, 0, 231, 130, 26, 0, 244, 184, 76, 12, 0, 249, 214, 130, 43, 6, 0, 252, 232, 173, 87, 24, 3, 0, 253, 241, 203, 131, 56, 14, 2, 0, 254, 246, 221, 167, 94, 35, 8, 1, 0, 254, 249, 232, 193, 130, 65, 23, 5, 1, 0, 255, 251, 239, 211, 162, 99, 45, 15, 4, 1, 0, 255, 251, 243, 223, 186, 131, 74, 33, 11, 3, 1, 0, 255, 252, 245, 230, 202, 158, 105, 57, 24, 8, 2, 1, 0, 255, 253, 247, 235, 214, 179, 132, 84, 44, 19, 7, 2, 1, 0, 255, 254, 250, 240, 223, 196, 159, 112, 69, 36, 15, 6, 2, 1, 0, 255, 254, 253, 245, 231, 209, 176, 136, 93, 55, 27, 11, 3, 2, 1, 0, 255, 254, 253, 252, 239, 221, 194, 158, 117, 76, 42, 18, 4, 3, 2, 1, 0];
#[rustfmt::skip]
pub static SILK_SHELL_CODE_TABLE_OFFSETS: [u8; 17] =
[ 0, 0, 2, 5, 9, 14, 20, 27, 35, 44, 54, 65, 77, 90, 104, 119, 135];
#[rustfmt::skip]
pub static SILK_SIGN_ICDF: [u8; 42] =
[254, 49, 67, 77, 82, 93, 99, 198, 11, 18, 24, 31, 36, 45, 255, 46, 66, 78, 87, 94, 104, 208, 14, 21, 32, 42, 51, 66, 255, 94, 104, 109, 112, 115, 118, 248, 53, 69, 80, 88, 95, 102];
// Compile-time shape checks
const _: [(); 4] = [(); SILK_MAX_PULSES_TABLE.len()];
const _: [(); 10] = [(); SILK_PULSES_PER_BLOCK_ICDF.len()];
const _: [(); 18] = [(); SILK_PULSES_PER_BLOCK_ICDF[0].len()];
const _: [(); 9] = [(); SILK_PULSES_PER_BLOCK_BITS_Q5.len()];
const _: [(); 18] = [(); SILK_PULSES_PER_BLOCK_BITS_Q5[0].len()];
const _: [(); 2] = [(); SILK_RATE_LEVELS_ICDF.len()];
const _: [(); 9] = [(); SILK_RATE_LEVELS_ICDF[0].len()];
const _: [(); 152] = [(); SILK_SHELL_CODE_TABLE0.len()];
const _: [(); 152] = [(); SILK_SHELL_CODE_TABLE1.len()];
const _: [(); 152] = [(); SILK_SHELL_CODE_TABLE2.len()];
const _: [(); 152] = [(); SILK_SHELL_CODE_TABLE3.len()];
const _: [(); 17] = [(); SILK_SHELL_CODE_TABLE_OFFSETS.len()];
const _: [(); 42] = [(); SILK_SIGN_ICDF.len()];
#[cfg(test)]
mod tests {
use super::*;
fn is_nonincreasing(xs: &[u8]) -> bool {
xs.windows(2).all(|window| window[0] >= window[1])
}
fn is_nondecreasing(xs: &[u8]) -> bool {
xs.windows(2).all(|window| window[0] <= window[1])
}
#[test]
fn pulses_per_block_icdf_well_formed() {
for row in SILK_PULSES_PER_BLOCK_ICDF.iter() {
assert_eq!(*row.last().unwrap(), 0);
assert!(is_nonincreasing(row));
}
}
#[test]
fn rate_levels_icdf_well_formed() {
for row in SILK_RATE_LEVELS_ICDF.iter() {
assert_eq!(*row.last().unwrap(), 0);
assert!(is_nonincreasing(row));
}
}
#[test]
fn sign_icdf_well_formed() {
const CHUNK: usize = 7;
assert_eq!(SILK_SIGN_ICDF.len() % CHUNK, 0);
for chunk in SILK_SIGN_ICDF.chunks(CHUNK) {
let (head, tail) = chunk.split_first().unwrap();
assert_eq!(tail.len(), CHUNK - 1);
assert!(*head >= 128);
assert!(is_nondecreasing(tail));
assert!(tail.iter().all(|value| value < head));
}
}
}