Fully implement MIDI support in standalone wrapper

src/wrapper/standalone/context.rs

@@ -33,9 +33,11 @@ pub(crate) struct WrapperInitContext<'a, P: Plugin, B: Backend> {
 pub(crate) struct WrapperProcessContext<'a, P: Plugin, B: Backend> {
     #[allow(dead_code)]
     pub(super) wrapper: &'a Wrapper<P, B>,
-    // TODO: Events
+    pub(super) input_events: &'a [NoteEvent],
-    // pub(super) input_events_guard: AtomicRefMut<'a, VecDeque<NoteEvent>>,
+    // The current index in `input_events`, since we're not actually popping anything from a queue
-    // pub(super) output_events_guard: AtomicRefMut<'a, VecDeque<NoteEvent>>,
+    // here to keep the standalone backend implementation a bit more flexible
+    pub(super) input_events_idx: usize,
+    pub(super) output_events: &'a mut Vec<NoteEvent>,
     pub(super) transport: Transport,
 }
 
@@ -100,16 +102,19 @@ impl<P: Plugin, B: Backend> ProcessContext for WrapperProcessContext<'_, P, B> {
     }
 
     fn next_event(&mut self) -> Option<NoteEvent> {
-        nih_debug_assert_failure!("TODO: WrapperProcessContext::next_event()");
+        // We'll pretend we're a queue, choo choo
+        if self.input_events_idx < self.input_events.len() {
+            let event = self.input_events[self.input_events_idx];
+            self.input_events_idx += 1;
 
-        // self.input_events_guard.pop_front()
+            Some(event)
-        None
+        } else {
+            None
+        }
     }
 
-    fn send_event(&mut self, _event: NoteEvent) {
+    fn send_event(&mut self, event: NoteEvent) {
-        nih_debug_assert_failure!("TODO: WrapperProcessContext::send_event()");
+        self.output_events.push(event);
-
-        // self.output_events_guard.push_back(event);
     }
 
     fn set_latency_samples(&self, _samples: u32) {

src/wrapper/standalone/wrapper.rs

@@ -14,6 +14,7 @@ use super::backend::Backend;
 use super::config::WrapperConfig;
 use super::context::{WrapperGuiContext, WrapperInitContext, WrapperProcessContext};
 use crate::context::Transport;
+use crate::midi::NoteEvent;
 use crate::param::internals::{ParamPtr, Params};
 use crate::param::ParamFlags;
 use crate::plugin::{
@@ -372,8 +373,6 @@ impl<P: Plugin, B: Backend> Wrapper<P, B> {
                     return false;
                 }
 
-                // TODO: Do something with the input and output events
-
                 let sample_rate = self.buffer_config.sample_rate;
                 let mut transport = Transport::new(sample_rate);
                 transport.pos_samples = Some(num_processed_samples);
@@ -389,7 +388,7 @@ impl<P: Plugin, B: Backend> Wrapper<P, B> {
                         inputs: &mut [],
                         outputs: &mut [],
                     },
-                    &mut self.make_process_context(transport),
+                    &mut self.make_process_context(transport, input_events, output_events),
                 ) {
                     nih_error!("The plugin returned an error while processing:");
                     nih_error!("{}", err);
@@ -481,9 +480,17 @@ impl<P: Plugin, B: Backend> Wrapper<P, B> {
         WrapperInitContext { wrapper: self }
     }
 
-    fn make_process_context(&self, transport: Transport) -> WrapperProcessContext<'_, P, B> {
+    fn make_process_context<'a>(
+        &'a self,
+        transport: Transport,
+        input_events: &'a [NoteEvent],
+        output_events: &'a mut Vec<NoteEvent>,
+    ) -> WrapperProcessContext<'a, P, B> {
         WrapperProcessContext {
             wrapper: self,
+            input_events,
+            input_events_idx: 0,
+            output_events,
             transport,
         }
     }