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use super::{
mem, FactoryParameters, GenBox, GenFactoryError, Generator, GeneratorFactory, ParamValue,
Parameters, Sample, SampleBuffer,
};
#[derive(Debug)]
pub struct Param {
pub name: String,
pub default: Sample,
pub buf: SampleBuffer,
}
impl Generator for Param {
fn eval<'a>(&'a mut self, params: &Parameters) -> &'a SampleBuffer {
self.buf
.set(*params.vars.get(&self.name).unwrap_or(&self.default));
&self.buf
}
fn buffer(&self) -> &SampleBuffer {
&self.buf
}
fn set_buffer(&mut self, buf: SampleBuffer) -> SampleBuffer {
mem::replace(&mut self.buf, buf)
}
}
pub struct ParamFactory;
impl GeneratorFactory for ParamFactory {
fn new(&self, params: &mut FactoryParameters) -> Result<GenBox, GenFactoryError> {
Ok(Box::new(Param {
name: params.get_req_param("name", 0)?.as_string()?,
default: params
.get_param("default", 1, &mut ParamValue::Float(0.0))
.as_f32()?,
buf: SampleBuffer::new(1),
}))
}
}
pub static Factory: ParamFactory = ParamFactory;
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