From 18a9fd9f4c2911f09f6fdbee49fb29dc591536c4 Mon Sep 17 00:00:00 2001
From: Grant Shangreaux <grant@unabridgedsoftware.com>
Date: Sat, 16 Oct 2021 22:54:29 -0500
Subject: Add: Node based Synth struct in Rust lib and load class in Godot

---
 klangfarb/Main.gdns    |  4 ++--
 klangfarbrs/src/lib.rs | 40 +++++++++++++++++++++++++---------------
 2 files changed, 27 insertions(+), 17 deletions(-)

diff --git a/klangfarb/Main.gdns b/klangfarb/Main.gdns
index 5855b12..673e307 100644
--- a/klangfarb/Main.gdns
+++ b/klangfarb/Main.gdns
@@ -3,6 +3,6 @@
 [ext_resource path="res://libklangfarbrs.gdnlib" type="GDNativeLibrary" id=1]
 
 [resource]
-resource_name = "HelloWorld"
-class_name = "HelloWorld"
+resource_name = "Synth"
+class_name = "Synth"
 library = ExtResource( 1 )
diff --git a/klangfarbrs/src/lib.rs b/klangfarbrs/src/lib.rs
index f116430..2dbc299 100644
--- a/klangfarbrs/src/lib.rs
+++ b/klangfarbrs/src/lib.rs
@@ -26,38 +26,47 @@ impl HelloWorld {
 }
 
 #[derive(NativeClass)]
-#[inherit(Resource)]
+#[inherit(Node)]
 pub struct Synth {
     frequency: f32
 }
 
 #[methods]
 impl Synth {
+    fn new(_owner: &Node) -> Self {
+        Synth { frequency: 220.0 }
+    }
+
     #[export]
     fn set_freq(
         &mut self,
-        _owner: &Resource,
+        _owner: &Node,
         freq: f32
     ) {
         self.frequency = freq;
     }
 
     #[export]
-    fn _ready(&self, _owner: &Resource) {
-        let host = cpal::default_host();
-        let device = host
-            .default_output_device()
-            .expect("failed to find a default output device");
-        let config = device.default_output_config();
-
-        match config.sample_format() {
-            cpal::SampleFormat::F32 => run::<f32>(&device, &config.into()),
-            cpal::SampleFormat::I16 => run::<i16>(&device, &config.into()),
-            cpal::SampleFormat::U16 => run::<u16>(&device, &config.into()),
-        };
+    fn _ready(&self, _owner: &Node) {
+        godot_print!("POOOP");
+       play();
+    }
+}
 
-        ();
+fn play() -> Result<(), anyhow::Error> {
+    let host = cpal::default_host();
+    let device = host
+        .default_output_device()
+        .expect("failed to find a default output device");
+    let config = device.default_output_config()?;
+
+    match config.sample_format() {
+        cpal::SampleFormat::F32 => run::<f32>(&device, &config.into())?,
+        cpal::SampleFormat::I16 => run::<i16>(&device, &config.into())?,
+        cpal::SampleFormat::U16 => run::<u16>(&device, &config.into())?,
     }
+
+    Ok(())
 }
 
 fn run<T>(device: &cpal::Device, config: &cpal::StreamConfig) -> Result<(), anyhow::Error>
@@ -126,6 +135,7 @@ fn write_data<T>(
 fn init(handle: InitHandle) {
     // Register the new `HelloWorld` type we just declared.
     handle.add_class::<HelloWorld>();
+    handle.add_class::<Synth>();
 }
 
 // Macro that creates the entry-points of the dynamic library.
-- 
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