146 lines
3.5 KiB
Rust
146 lines
3.5 KiB
Rust
use crate::audio::node_graph::{AudioNode, NodeCategory, NodePort, Parameter, ParameterUnit, SignalType};
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use crate::audio::midi::MidiEvent;
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const PARAM_MIX: u32 = 0;
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/// Ring Modulator - multiplies two signals together
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/// Creates metallic, inharmonic timbres by multiplying carrier and modulator
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pub struct RingModulatorNode {
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name: String,
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mix: f32, // 0.0 = dry (carrier only), 1.0 = fully modulated
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inputs: Vec<NodePort>,
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outputs: Vec<NodePort>,
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parameters: Vec<Parameter>,
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}
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impl RingModulatorNode {
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pub fn new(name: impl Into<String>) -> Self {
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let name = name.into();
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let inputs = vec![
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NodePort::new("Carrier", SignalType::Audio, 0),
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NodePort::new("Modulator", SignalType::Audio, 1),
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];
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let outputs = vec![
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NodePort::new("Audio Out", SignalType::Audio, 0),
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];
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let parameters = vec![
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Parameter::new(PARAM_MIX, "Mix", 0.0, 1.0, 1.0, ParameterUnit::Generic),
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];
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Self {
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name,
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mix: 1.0,
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inputs,
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outputs,
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parameters,
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}
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}
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}
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impl AudioNode for RingModulatorNode {
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fn category(&self) -> NodeCategory {
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NodeCategory::Effect
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}
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fn inputs(&self) -> &[NodePort] {
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&self.inputs
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}
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fn outputs(&self) -> &[NodePort] {
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&self.outputs
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}
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fn parameters(&self) -> &[Parameter] {
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&self.parameters
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}
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fn set_parameter(&mut self, id: u32, value: f32) {
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match id {
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PARAM_MIX => self.mix = value.clamp(0.0, 1.0),
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_ => {}
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}
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}
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fn get_parameter(&self, id: u32) -> f32 {
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match id {
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PARAM_MIX => self.mix,
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_ => 0.0,
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}
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}
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fn process(
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&mut self,
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inputs: &[&[f32]],
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outputs: &mut [&mut [f32]],
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_midi_inputs: &[&[MidiEvent]],
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_midi_outputs: &mut [&mut Vec<MidiEvent>],
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_sample_rate: u32,
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) {
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if outputs.is_empty() {
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return;
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}
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let output = &mut outputs[0];
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let length = output.len();
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// Get carrier input
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let carrier = if !inputs.is_empty() && !inputs[0].is_empty() {
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inputs[0]
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} else {
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&[]
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};
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// Get modulator input
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let modulator = if inputs.len() > 1 && !inputs[1].is_empty() {
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inputs[1]
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} else {
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&[]
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};
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// Process each sample
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for i in 0..length {
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let carrier_sample = if i < carrier.len() { carrier[i] } else { 0.0 };
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let modulator_sample = if i < modulator.len() { modulator[i] } else { 0.0 };
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// Ring modulation: multiply the two signals
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let modulated = carrier_sample * modulator_sample;
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// Mix between dry (carrier) and wet (modulated)
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output[i] = carrier_sample * (1.0 - self.mix) + modulated * self.mix;
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}
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}
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fn reset(&mut self) {
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// No state to reset
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}
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fn node_type(&self) -> &str {
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"RingModulator"
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}
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fn name(&self) -> &str {
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&self.name
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}
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fn clone_node(&self) -> Box<dyn AudioNode> {
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Box::new(Self {
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name: self.name.clone(),
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mix: self.mix,
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inputs: self.inputs.clone(),
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outputs: self.outputs.clone(),
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parameters: self.parameters.clone(),
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})
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}
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fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
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self
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}
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fn as_any(&self) -> &dyn std::any::Any {
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self
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}
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}
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