Add a (not yet functional) standalone run function

src/wrapper/standalone.rs

@@ -72,19 +72,28 @@ pub fn nih_export_standalone_with_args<P: Plugin, Args: IntoIterator<Item = Stri
 
     let wrapper = match Wrapper::<P>::new(config.clone()) {
         Ok(wrapper) => wrapper,
-        Err(WrapperError::IncompatibleConfig) => {
-            eprintln!("The plugin does not support the {} channel input and {} channel output configuration", config.input_channels, config.output_channels);
-            return false;
-        }
-        Err(WrapperError::InitializationFailed) => {
-            eprintln!("The plugin failed to initialize");
+        Err(err) => {
+            print_error(err, &config);
             return false;
         }
     };
 
-    // TODO: Open the editor if available, do IO things
-    // TODO: If the plugin has an editor, block until the editor is closed. Otherwise block
-    //       indefinitely or until SIGINT (how do signal handlers work in Rust?)
-
-    true
+    match wrapper.run() {
+        Ok(()) => true,
+        Err(err) => {
+            print_error(err, &config);
+            false
+        }
+    }
+}
+
+fn print_error(error: WrapperError, config: &WrapperConfig) {
+    match error {
+        WrapperError::IncompatibleConfig => {
+            eprintln!("The plugin does not support the {} channel input and {} channel output configuration", config.input_channels, config.output_channels);
+        }
+        WrapperError::InitializationFailed => {
+            eprintln!("The plugin failed to initialize");
+        }
+    }
 }

src/wrapper/standalone/wrapper.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 
 use super::context::WrapperProcessContext;
 use crate::context::Transport;
-use crate::plugin::{BufferConfig, BusConfig, Plugin};
+use crate::plugin::{BufferConfig, BusConfig, Editor, Plugin};
 
 /// Configuration for a standalone plugin that would normally be provided by the DAW.
 #[derive(Debug, Clone)]
@@ -28,6 +28,10 @@ pub struct WrapperConfig {
 pub struct Wrapper<P: Plugin> {
     /// The wrapped plugin instance.
     plugin: RwLock<P>,
+    /// The plugin's editor, if it has one. This object does not do anything on its own, but we need
+    /// to instantiate this in advance so we don't need to lock the entire [`Plugin`] object when
+    /// creating an editor.
+    editor: Option<Box<dyn Editor>>,
 
     config: WrapperConfig,
 
@@ -37,6 +41,7 @@ pub struct Wrapper<P: Plugin> {
 }
 
 /// Errors that may arise while initializing the wrapped plugins.
+#[derive(Debug, Clone, Copy)]
 pub enum WrapperError {
     /// The plugin does not accept the IO configuration from the config.
     IncompatibleConfig,
@@ -48,8 +53,13 @@ impl<P: Plugin> Wrapper<P> {
     /// Instantiate a new instance of the standalone wrapper. Returns an error if the plugin does
     /// not accept the IO configuration from the wrapper config.
     pub fn new(config: WrapperConfig) -> Result<Arc<Self>, WrapperError> {
+        let plugin = P::default();
+        let editor = plugin.editor();
+
         let wrapper = Arc::new(Wrapper {
-            plugin: RwLock::new(P::default()),
+            plugin: RwLock::new(plugin),
+            editor,
+
             bus_config: BusConfig {
                 num_input_channels: config.input_channels,
                 num_output_channels: config.output_channels,
@@ -81,6 +91,19 @@ impl<P: Plugin> Wrapper<P> {
         Ok(wrapper)
     }
 
+    /// Open the editor, start processing audio, and block this thread until the editor is closed.
+    /// If the plugin does not have an editor, then this will block until SIGINT is received.
+    ///
+    /// Will return an error if the plugin threw an error during audio processing or if the editor
+    /// could not be opened.
+    pub fn run(self: Arc<Self>) -> Result<(), WrapperError> {
+        // TODO: Open the editor and block until it is closed
+        // TODO: Do IO things
+        // TODO: Block until SIGINT is received if the plugin does not have an editor
+
+        Ok(())
+    }
+
     fn make_process_context(&self, transport: Transport) -> WrapperProcessContext<'_, P> {
         WrapperProcessContext {
             wrapper: self,