Moved overall model updating logic out of the GUI layer

This will be useful eventually for sharing a bit more overall
application logic with the wasm build.

1 files changed, 35 insertions, 0 deletions

diff --git a/src/model.rs b/src/model.rs
new file mode 100644
index 0000000..7fad354
--- /dev/null
+++ b/src/model.rs
@@ -0,0 +1,35 @@
+use transforms;
+
+#[derive(Default)]
+pub struct Model {
+    pub fundamental_frequency: Option<f32>,
+    pub pitch: String,
+    pub error: Option<f32>,
+    pub signal: Vec<f32>,
+    pub correlation: Vec<f32>
+}
+
+impl Model {
+    pub fn new() -> Model {
+        Model::default()
+    }
+
+    pub fn from_signal(signal: &[f32], sample_rate: f32) -> Model {
+        let correlation = transforms::correlation(signal);
+        let fundamental = transforms::find_fundamental_frequency(signal, sample_rate);
+        let pitch = fundamental.map_or(
+            String::new(),
+            transforms::hz_to_pitch
+        );
+        
+        let error = fundamental.map(transforms::hz_to_cents_error);
+        
+        Model {
+            fundamental_frequency: fundamental,
+            pitch: pitch,
+            error: error,
+            signal: transforms::align_to_rising_edge(signal),
+            correlation: correlation
+        }
+    }
+}