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Add horizontal predictor support (#240)

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Jean-Baptiste Skutnik authored and GitHub committed 2024-09-23 19:45:45 +01:00
1 parent de6d9cf131
commit e28ad564d9
7 files changed
+475 -77
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src/decoder/mod.rs
+3 -3
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@@ -265,21 +265,21 @@ fn rev_hpredict_nsamp(buf: &mut [u8], bit_depth: u8, samples: usize) {
9..=16 => {
for i in (samples * 2..buf.len()).step_by(2) {
let v = u16::from_ne_bytes(buf[i..][..2].try_into().unwrap());
let p = u16::from_ne_bytes(buf[i - samples..][..2].try_into().unwrap());
let p = u16::from_ne_bytes(buf[i - 2 * samples..][..2].try_into().unwrap());
buf[i..][..2].copy_from_slice(&(v.wrapping_add(p)).to_ne_bytes());
}
}
17..=32 => {
for i in (samples * 4..buf.len()).step_by(4) {
let v = u32::from_ne_bytes(buf[i..][..4].try_into().unwrap());
let p = u32::from_ne_bytes(buf[i - samples..][..4].try_into().unwrap());
let p = u32::from_ne_bytes(buf[i - 4 * samples..][..4].try_into().unwrap());
buf[i..][..4].copy_from_slice(&(v.wrapping_add(p)).to_ne_bytes());
}
}
33..=64 => {
for i in (samples * 8..buf.len()).step_by(8) {
let v = u64::from_ne_bytes(buf[i..][..8].try_into().unwrap());
let p = u64::from_ne_bytes(buf[i - samples..][..8].try_into().unwrap());
let p = u64::from_ne_bytes(buf[i - 8 * samples..][..8].try_into().unwrap());
buf[i..][..8].copy_from_slice(&(v.wrapping_add(p)).to_ne_bytes());
}
}