diff options
Diffstat (limited to 'klangfarbrs/src/instrument.rs')
| -rw-r--r-- | klangfarbrs/src/instrument.rs | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/klangfarbrs/src/instrument.rs b/klangfarbrs/src/instrument.rs index 3a381dc..bf08fe4 100644 --- a/klangfarbrs/src/instrument.rs +++ b/klangfarbrs/src/instrument.rs @@ -1,11 +1,18 @@ -use super::{ Osc, Envelope, Sample }; +use super::{ Partial, Sample, Hz, SamplesPerSecond }; pub struct Instrument { - pub osc_bank: Vec<Osc>, - pub envelope: Envelope, + pub partials: Vec<Partial>, } impl Instrument { + pub fn new(base_freq: Hz, partial_multipliers: Vec<f32>, sample_rate: SamplesPerSecond) -> Self { + Self { + partials: partial_multipliers.iter() + .map(|&p| Partial::new(1.0, 1.0, p, 0.0, sample_rate, 2000, base_freq)) + .collect() + } + } + pub fn sample(&mut self) -> Sample { match self.next() { Some(s) => { s }, @@ -18,12 +25,16 @@ impl Iterator for Instrument { type Item = Sample; fn next(&mut self) -> Option<Self::Item> { - let goo : f32 = self.osc_bank.iter_mut().map(|o| o.sample()).sum(); - let scaled = goo / self.osc_bank.len() as f32; + let partial_samps : Vec<Option<Sample>> = self.partials.iter_mut() + .map(|o| o.next()).collect(); + + let filtered : Vec<Sample> = partial_samps.iter().filter(|opt| opt.is_some()) + .map(|i| i.unwrap()).collect(); - match self.envelope.next() { - Some(a) => Some(scaled * a), - None => None + if filtered.is_empty() { + None + } else { + Some(filtered.iter().sum()) } } } @@ -35,11 +46,9 @@ mod tests { #[test] fn test_name() { let sr = 44800.0; - let mut inst = Instrument { - osc_bank: vec![Osc::new(220.0, sr), Osc::new(440.0, sr), Osc::new(880.0, sr)], - envelope: Envelope::new(10, 200, 0.7, 1000, sr), - }; + let mut inst = Instrument::new(220.0, vec![1.0, 2.0, 4.0], sr); assert_eq!(inst.next(), Some(0.0)); + assert_eq!(inst.last(), Some(0.0)); } } |