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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| //! Optimize a stereo reverb. Please run me in release mode! | ||
| use fundsp::hacker32::*; | ||
| use fundsp::reverb::*; | ||
| use funutd::dna::*; | ||
| use funutd::*; | ||
| use rayon::prelude::*; | ||
|
|
||
| /// Evaluate reverb quality from its genotype. | ||
| fn evaluate_reverb(dna: &mut Dna) -> f32 { | ||
| let reverb = generate_reverb(dna); | ||
| // Prevent cases where two lines have the same length. | ||
| let mut repeat_fitness = 0.0; | ||
| for i in 0..dna.parameters() { | ||
| let i_time = dna.parameter(i).value_f32().unwrap(); | ||
| for j in i + 1..dna.parameters() { | ||
| let j_time = dna.parameter(j).value_f32().unwrap(); | ||
| if round(44100.0 * i_time) == round(44100.0 * j_time) { | ||
| repeat_fitness -= 100.0; | ||
| } | ||
| } | ||
| } | ||
| repeat_fitness + reverb_fitness(reverb) | ||
| } | ||
|
|
||
| fn main() { | ||
| let mut rng = Rnd::from_time(); | ||
|
|
||
| let mut dna = Dna::new(rng.u64()); | ||
| let mut fitness = evaluate_reverb(&mut dna); | ||
| let mut rounds = 0; | ||
|
|
||
| loop { | ||
| rounds += 1; | ||
|
|
||
| let mut seeds = vec![]; | ||
| for _ in 0..360 { | ||
| seeds.push((rng.u64(), rng.f32() * rng.f32())); | ||
| } | ||
| let mutateds: Vec<(Dna, f32)> = seeds | ||
| .par_iter() | ||
| .map(|(seed, p)| { | ||
| let mutation_p = xerp(1.0 / 30.0, 1.5, *p).min(1.0); | ||
| let mut mutated = Dna::mutate(&dna, *seed, mutation_p); | ||
| let mutated_fitness = evaluate_reverb(&mut mutated); | ||
| (mutated, mutated_fitness) | ||
| }) | ||
| .collect(); | ||
|
|
||
| let mut improved = false; | ||
| for (mut mutated, mutated_fitness) in mutateds { | ||
| if mutated_fitness > fitness { | ||
| fitness = mutated_fitness; | ||
| std::mem::swap(&mut dna, &mut mutated); | ||
| improved = true; | ||
| } | ||
| } | ||
|
|
||
| if improved || rounds % 1000 == 0 { | ||
| println!( | ||
| "Rounds {} (Candidates {}) Fitness {}", | ||
| rounds, | ||
| rounds * 360, | ||
| fitness | ||
| ); | ||
| } | ||
| if improved { | ||
| let mut delays = Vec::new(); | ||
| for i in 0..dna.parameters() { | ||
| let delay = dna.parameter(i).value_f32().unwrap(); | ||
| println!( | ||
| "{}: {} ({})", | ||
| dna.parameter(i).name(), | ||
| delay, | ||
| round(delay * 44100.0) as i32 | ||
| ); | ||
| delays.push(delay); | ||
| } | ||
| println!("{:?}", delays); | ||
| } | ||
| } | ||
| } |
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