Starting work on proto decode

1 files changed, 25 insertions, 0 deletions

diff --git a/src/synth/saw.rs b/src/synth/saw.rs
new file mode 100644
index 0000000..bfd3cb0
--- /dev/null
+++ b/src/synth/saw.rs
@@ -0,0 +1,25 @@
+use super::*;
+
+#[derive(Debug)]
+pub struct Saw {
+    pub freq: GenBox,
+    pub phase: f32,
+    pub buf: SampleBuffer,
+}
+
+impl Generator for Saw {
+    fn eval<'a>(&'a mut self, params: &Parameters) -> &'a SampleBuffer {
+        self.buf.rate = Rate::Sample;
+
+        let pvel = self.freq.eval(params).first() / params.env.sample_rate;
+        for i in 0..self.buf.len() {
+            self.buf[i] = 2.0 * ((self.phase + pvel * (i as f32)) % 1.0) - 1.0;
+        }
+
+        self.phase = (self.phase + pvel * (self.buf.len() as f32)) % 1.0;
+        &self.buf
+    }
+    fn set_buffer(&mut self, buf: SampleBuffer) -> SampleBuffer {
+        mem::replace(&mut self.buf, buf)
+    }
+}