wip: refactor into fewer crates

deps/vst/examples/fwd_midi.rs

@@ -0,0 +1,71 @@
+#[macro_use]
+extern crate vst;
+
+use vst::api;
+use vst::prelude::*;
+
+plugin_main!(MyPlugin); // Important!
+
+#[derive(Default)]
+struct MyPlugin {
+    host: HostCallback,
+    recv_buffer: SendEventBuffer,
+    send_buffer: SendEventBuffer,
+}
+
+impl MyPlugin {
+    fn send_midi(&mut self) {
+        self.send_buffer
+            .send_events(self.recv_buffer.events().events(), &mut self.host);
+        self.recv_buffer.clear();
+    }
+}
+
+impl Plugin for MyPlugin {
+    fn new(host: HostCallback) -> Self {
+        MyPlugin {
+            host,
+            ..Default::default()
+        }
+    }
+
+    fn get_info(&self) -> Info {
+        Info {
+            name: "fwd_midi".to_string(),
+            unique_id: 7357001, // Used by hosts to differentiate between plugins.
+            ..Default::default()
+        }
+    }
+
+    fn process_events(&mut self, events: &api::Events) {
+        self.recv_buffer.store_events(events.events());
+    }
+
+    fn process(&mut self, buffer: &mut AudioBuffer<f32>) {
+        for (input, output) in buffer.zip() {
+            for (in_sample, out_sample) in input.iter().zip(output) {
+                *out_sample = *in_sample;
+            }
+        }
+        self.send_midi();
+    }
+
+    fn process_f64(&mut self, buffer: &mut AudioBuffer<f64>) {
+        for (input, output) in buffer.zip() {
+            for (in_sample, out_sample) in input.iter().zip(output) {
+                *out_sample = *in_sample;
+            }
+        }
+        self.send_midi();
+    }
+
+    fn can_do(&self, can_do: CanDo) -> vst::api::Supported {
+        use vst::api::Supported::*;
+        use vst::plugin::CanDo::*;
+
+        match can_do {
+            SendEvents | SendMidiEvent | ReceiveEvents | ReceiveMidiEvent => Yes,
+            _ => No,
+        }
+    }
+}