simple wavetable

.gitignore

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+/target
+Cargo.lock

Cargo.toml

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+[package]
+name = "wavetable-synth"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

README.md

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+# WAVETABLE SYNTH
+synthesizes sounds using a wavetable.
+
+## REQUIREMENTS
+`no_std` compatible
+
+
+## MODULES
+### `wavetable`
+trait definitions for a wavetable manager

src/lib.rs

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+#![no_std]
+mod wavetable;

src/wavetable.rs

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+pub trait Wavetable {
+    type OutputType;
+    /// get next sample
+    fn next(&mut self) -> Self::OutputType;
+}
+
+pub struct SimpleWavetable<'a> {
+    // byte array for waveform
+    table: &'a [u8],
+    // index in the waveform
+    index: usize,
+}
+
+impl<'a> Wavetable for SimpleWavetable<'a> {
+    type OutputType = u8;
+    fn next(&mut self) -> Self::OutputType {
+        let value = self.table[self.index];
+        self.index += 1;
+        if self.index > self.table.len() {
+            self.index = 0;
+        }
+        value
+    }
+}
+
+impl<'a> SimpleWavetable<'a> {
+    pub fn new(table: &'a [u8]) -> Self {
+        Self { table, index: 0 }
+    }
+}
+
+// TESTS
+#[cfg(test)]
+pub mod test {
+    use super::*;
+
+    #[test]
+    fn wavetable_t1() {
+        let table_data: [u8; 2] = [0, 255];
+        let mut w = SimpleWavetable::new(&table_data);
+        for point in table_data {
+            assert!(w.next() == point);
+        }
+    }
+}
+
+// TODO:
+// - interpolated wavetable