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exploring more corner cases, fixing the lookup table

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This commit is contained in:
Weird Constructor 2021-08-28 14:56:20 +02:00
parent a24ae750d6
commit b22c084b08
2 changed files with 115 additions and 11 deletions
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36
src/dsp/helpers.rs
View file

@ -2138,7 +2138,7 @@ impl<F: Flt> TriSawLFO<F> {
pub struct Quantizer {
old_mask: i64,
keys: [f32; 12],
lkup_tbl: [u8; 24],
lkup_tbl: [(i8, i8); 24],
}
impl Quantizer {
@ -2146,7 +2146,7 @@ impl Quantizer {
Self {
old_mask: 0xFFFF_FFFF,
keys: [0.0; 12],
lkup_tbl: [0; 24]
lkup_tbl: [(0, 0); 24]
}
}
@ -2216,16 +2216,30 @@ impl Quantizer {
continue;
}
println!("I={:3} NOTE={:3} (IDX={:3} => bitset {}) DIST={:3}",
i, note, note_idx,
if (mask & (0x1 << ((note_idx + 9) % 12))) > 0x0 { 1 } else { 0 },
dist);
if dist < min_dist {
min_d_note_idx = note_idx;
// min_d_note_idx = note_idx;
min_d_note_idx = note;
min_dist = dist;
} else {
break;
}
}
self.lkup_tbl[i as usize] = min_d_note_idx as u8;
self.lkup_tbl[i as usize] = (
if min_d_note_idx < 0 { -1 }
else if min_d_note_idx > 11 { 1 }
else { 0 },
min_d_note_idx.rem_euclid(12) as i8
);
}
println!("KEYS: {:?}", self.keys);
println!("TBL: {:?}", self.lkup_tbl);
}
//# float pitch = inputs[PITCH_INPUT].getVoltage(c);
@ -2244,15 +2258,17 @@ impl Quantizer {
let octave = note_num.div_euclid(24);
let note_idx = note_num - octave * 24;
println!(
"INP {:7.4} => octave={:3}, note_idx={:3} note_num={:3} inp={:9.6}",
inp, octave, note_idx, note_num, inp * 240.0);
// println!(
// "INP {:7.4} => octave={:3}, note_idx={:3} note_num={:3} inp={:9.6}",
// inp, octave, note_idx, note_num, inp * 240.0);
//d// println!("KEYS: {:?}", self.keys);
//d// println!("TBL: {:?}", self.lkup_tbl);
let note_idx = self.lkup_tbl[note_idx as usize % 24];
let pitch = self.keys[note_idx as usize];
let (oct_offs, note_idx) =
self.lkup_tbl[note_idx as usize % 24];
let pitch = self.keys[note_idx as usize];
pitch + octave as f32 * 0.1
pitch + (oct_offs as i64 + octave) as f32 * 0.1
}
}

90
tests/quant.rs
View file

@ -9,7 +9,7 @@ use hexodsp::dsp::helpers::Quantizer;
use hexodsp::d_pit;
#[test]
fn check_quant_1() {
fn check_quant_pos_neg_exact() {
let mut q = Quantizer::new();
q.set_keys(0x0);
@ -57,3 +57,91 @@ fn check_quant_1() {
220.0
]);
}
#[test]
fn check_quant_precise_01_range() {
let mut q = Quantizer::new();
q.set_keys(0x0);
let v =
(0..=48).map(|i|
d_pit!(
q.process(
i as f32 * ((0.1 * 0.25) / 12.0)))
).collect::<Vec<f32>>();
assert_vec_feq!(v, vec![
440.0,
466.1638, 466.1638, 466.1638, 466.1638,
493.8833, 493.8833, 493.8833, 493.8833,
523.2511, 523.2511, 523.2511, 523.2511,
554.3653, 554.3653, 554.3653, 554.3653,
587.3295, 587.3295, 587.3295, 587.3295,
622.25397, 622.25397, 622.25397, 622.25397,
659.2551, 659.2551, 659.2551, 659.2551,
698.4565, 698.4565, 698.4565, 698.4565,
739.98883, 739.98883, 739.98883, 739.98883,
783.9909, 783.9909, 783.9909, 783.9909,
830.6094, 830.6094, 830.6094, 830.6094,
880.0, 880.0, 880.0, 880.0
]);
}
#[test]
fn check_quant_neg_pos_range() {
let mut q = Quantizer::new();
q.set_keys(0x0);
let v =
(0..=48).map(|i| {
let i = i - 24;
d_pit!(
q.process(
i as f32 * ((0.1 * 0.25) / 12.0)))
}).collect::<Vec<f32>>();
assert_vec_feq!(v, vec![
311.12698, 311.12698,
329.62756, 329.62756, 329.62756, 329.62756,
349.22824, 349.22824, 349.22824, 349.22824,
369.99442, 369.99442, 369.99442, 369.99442,
391.99542, 391.99542, 391.99542, 391.99542,
415.3047, 415.3047, 415.3047, 415.3047,
440.0, 440.0, 440.0,
466.1638, 466.1638, 466.1638, 466.1638,
493.8833, 493.8833, 493.8833, 493.8833,
523.2511, 523.2511, 523.2511, 523.2511,
554.3653, 554.3653, 554.3653, 554.3653,
587.3295, 587.3295, 587.3295, 587.3295,
622.25397, 622.25397, 622.25397, 622.25397
]);
}
#[test]
fn check_quant_edge_oct_offs() {
let mut q = Quantizer::new();
q.set_keys(0b1001_0000_0000);
let v =
(0..=24).map(|i| {
d_pit!(
q.process(
i as f32 * ((0.1 * 0.5) / 12.0)))
}).collect::<Vec<f32>>();
assert_vec_feq!(v, vec![
311.12698, 311.12698,
329.62756, 329.62756, 329.62756, 329.62756,
349.22824, 349.22824, 349.22824, 349.22824,
369.99442, 369.99442, 369.99442, 369.99442,
391.99542, 391.99542, 391.99542, 391.99542,
415.3047, 415.3047, 415.3047, 415.3047,
440.0, 440.0, 440.0,
466.1638, 466.1638, 466.1638, 466.1638,
493.8833, 493.8833, 493.8833, 493.8833,
523.2511, 523.2511, 523.2511, 523.2511,
554.3653, 554.3653, 554.3653, 554.3653,
587.3295, 587.3295, 587.3295, 587.3295,
622.25397, 622.25397, 622.25397, 622.25397
]);
}