wip: vst2 host?

Cargo.lock

@@ -185,7 +185,7 @@ dependencies = [
  "heck",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.60",
 ]
 
 [[package]]
@@ -461,6 +461,36 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "num_enum"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f646caf906c20226733ed5b1374287eb97e3c2a5c227ce668c1f2ce20ae57c9"
+dependencies = [
+ "num_enum_derive",
+]
+
+[[package]]
+name = "num_enum_derive"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcbff9bc912032c62bf65ef1d5aea88983b420f4f839db1e9b0c281a25c9c799"
+dependencies = [
+ "proc-macro-crate",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "object"
 version = "0.35.0"
@@ -511,6 +541,16 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
+[[package]]
+name = "proc-macro-crate"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f4c021e1093a56626774e81216a4ce732a735e5bad4868a03f3ed65ca0c3919"
+dependencies = [
+ "once_cell",
+ "toml_edit 0.19.15",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.81"
@@ -619,7 +659,7 @@ checksum = "500cbc0ebeb6f46627f50f3f5811ccf6bf00643be300b4c3eabc0ef55dc5b5ba"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.60",
 ]
 
 [[package]]
@@ -674,7 +714,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2ff9eaf853dec4c8802325d8b6d3dffa86cc707fd7a1a4cdbf416e13b061787a"
 dependencies = [
  "quote",
- "syn",
+ "syn 2.0.60",
 ]
 
 [[package]]
@@ -708,7 +748,18 @@ dependencies = [
  "proc-macro2",
  "quote",
  "rustversion",
- "syn",
+ "syn 2.0.60",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
 ]
 
 [[package]]
@@ -735,6 +786,7 @@ dependencies = [
  "midly",
  "ratatui",
  "toml",
+ "vst",
 ]
 
 [[package]]
@@ -746,7 +798,7 @@ dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit",
+ "toml_edit 0.22.14",
 ]
 
 [[package]]
@@ -758,6 +810,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "toml_edit"
+version = "0.19.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b5bb770da30e5cbfde35a2d7b9b8a2c4b8ef89548a7a6aeab5c9a576e3e7421"
+dependencies = [
+ "indexmap",
+ "toml_datetime",
+ "winnow 0.5.40",
+]
+
 [[package]]
 name = "toml_edit"
 version = "0.22.14"
@@ -768,7 +831,7 @@ dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "winnow",
+ "winnow 0.6.13",
 ]
 
 [[package]]
@@ -811,6 +874,20 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "vst"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caf1ddbb85e53de6c1534f97340b065ca127678dcc31f88a33b93e54a5ac38dc"
+dependencies = [
+ "bitflags 1.3.2",
+ "libc",
+ "libloading",
+ "log",
+ "num-traits",
+ "num_enum",
+]
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
@@ -978,6 +1055,15 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
 
+[[package]]
+name = "winnow"
+version = "0.5.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f593a95398737aeed53e489c785df13f3618e41dbcd6718c6addbf1395aa6876"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "winnow"
 version = "0.6.13"
@@ -1004,5 +1090,5 @@ checksum = "15e934569e47891f7d9411f1a451d947a60e000ab3bd24fbb970f000387d1b3b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.60",
 ]

Cargo.toml

@@ -12,3 +12,6 @@ microxdg = "0.1.2"
 toml = "0.8.12"
 better-panic = "0.3.0"
 midly = "0.5"
+
+vst = "0.4.0"
+#vst3 = "0.1.0"

src/device/chain.rs

@@ -2,14 +2,16 @@ use crate::prelude::*;
 
 pub struct Chain {
     name:    String,
-    devices: Vec<Box<dyn Device>>
+    devices: Vec<Box<dyn Device>>,
+    focused: usize,
 }
 
 impl Chain {
     pub fn new (name: &str, devices: Vec<Box<dyn Device>>) -> Result<DynamicDevice<Self>, Box<dyn Error>> {
         Ok(DynamicDevice::new(render, handle, process, Self {
             name: name.into(),
-            devices
+            devices,
+            focused: 0
         }))
     }
 }
@@ -28,18 +30,17 @@ pub fn render (state: &Chain, buf: &mut Buffer, area: Rect)
     buf.set_string(area.x + area.width - 1, y, "│", Style::default().black());
     buf.set_string(area.x + 2, y, "Input...", Style::default().dim());
     let mut x = 0u16;
-    y = y + 1;
     for device in state.devices.iter() {
         let result = device.render(buf, Rect {
             x: area.x,
-            y: area.y + y,
+            y,
             width: area.width,
-            height: area.height.saturating_sub(y)
+            height: 21//area.height.saturating_sub(y)
         })?;
-        //buf.set_string(area.x, y, format!("{y}---TOP---+{h}"), Style::default().red());
+        //let result = Rect { x: 0, y: 0, width: result.width, height: 21 };
         x = x.max(result.width);
         y = y + result.height;
-        y = y + 1;
+        //y = y + 1;
         buf.set_string(area.x, y, "│", Style::default().black());
         buf.set_string(area.x + area.width - 1, y, "│", Style::default().black());
         buf.set_string(area.x + 2, y, "      Patch in ┐ │ └ Patch out", Style::default().dim());
@@ -48,7 +49,12 @@ pub fn render (state: &Chain, buf: &mut Buffer, area: Rect)
         //buf.set_string(area.x + area.width - 1, area.y + 1, "│", Style::default().black());
         //buf.set_string(area.x + 2, y, "Patch...", Style::default().dim());
     }
-    Ok(Rect { x: area.x, y: area.y, width: x, height: y })
+    Ok(draw_box(buf, Rect {
+        x: area.x,
+        y: area.y,
+        width:  area.width,
+        height: y - area.y,
+    }))
 }
 
 pub fn handle (_: &mut Chain, _: &AppEvent) -> Usually<bool> {

src/device/plugin.rs

@@ -1,17 +1,28 @@
 use crate::prelude::*;
 
 pub struct Plugin {
-    name: String
+    name:   String,
+    plugin: Option<::vst::host::PluginInstance>
 }
 
 impl Plugin {
     pub fn new (name: &str) -> Result<DynamicDevice<Self>, Box<dyn Error>> {
-        Ok(DynamicDevice::new(render, handle, process, Self {
+        let device = DynamicDevice::new(render, handle, process, Self {
-            name: name.into()
+            name: name.into(),
-        }))
+            plugin: None,
+        });
+        let mut loader = ::vst::host::PluginLoader::load(
+            &std::path::Path::new("/nix/store/ij3sz7nqg5l7v2dygdvzy3w6cj62bd6r-helm-0.9.0/lib/lxvst/helm.so"),
+            device.state.clone()
+        )?;
+        let plugin = loader.instance()?;
+        device.state.lock().unwrap().plugin = Some(plugin);
+        Ok(device)
     }
 }
 
+impl ::vst::host::Host for Plugin {}
+
 pub fn process (_: &mut Plugin, _: &Client, _: &ProcessScope) -> Control {
     Control::Continue
 }

src/layout.rs

@@ -31,12 +31,12 @@ impl Device for Rows {
                     true
                 },
                 Event::Key(KeyEvent { code: KeyCode::Enter, .. }) => {
-                    self.focused = false;
+                    self.focused = true;
                     self.items[self.focus].handle(&AppEvent::Focus)?;
                     true
                 },
                 Event::Key(KeyEvent { code: KeyCode::Esc, .. }) => {
-                    self.focused = true;
+                    self.focused = false;
                     self.items[self.focus].handle(&AppEvent::Blur)?;
                     true
                 },

src/main.rs

@@ -26,7 +26,10 @@ fn main () -> Result<(), Box<dyn Error>> {
     crate::device::run(Rows::new(false, vec![
         Box::new(transport),
         Box::new(Columns::new(false, vec![
+            Box::new(Chain::new("Chain#0000", vec![
                 Box::new(Sequencer::new("Melody#000", &timebase)?),
+                Box::new(Plugin::new("Plugin#000")?),
+            ])?),
             Box::new(Sequencer::new("Melody#001", &timebase)?),
             Box::new(Sequencer::new("Rhythm#000", &timebase)?),
         ])),