#1294 Add control transformation variable realearn_last_feedback_value

Cargo.toml

@@ -119,6 +119,7 @@ path-slash = "0.2.1"
 pathdiff = "0.2.1"
 open = "5.0.1"
 url = "2.5.2"
+atomic = "0.6.0"
 
 [profile.release]
 # This is important for having line numbers in bug reports.

main/Cargo.toml

@@ -205,6 +205,8 @@ auto_impl.workspace = true
 palette.workspace = true
 # For parsing/formatting enum-like target values from/to a stable and ID-like representation
 serde_plain.workspace = true
+# For sharing variables between main thread and real-time threads
+atomic.workspace = true
 
 [target.'cfg(any(target_os = "windows", target_os = "macos"))'.dependencies]
 # For speech source

main/src/domain/eel_transformation.rs

@@ -5,7 +5,9 @@ use helgoboss_learn::{
 };
 use std::os::raw::c_void;
 
+use atomic::Atomic;
 use reaper_medium::reaper_str;
+use std::sync::atomic::Ordering;
 use std::sync::Arc;
 
 #[derive(Default)]
@@ -25,6 +27,7 @@ struct EelUnit {
     y: eel::Variable,
     y_last: eel::Variable,
     y_type: eel::Variable,
+    last_feedback_value: eel::Variable,
     rel_time: Option<eel::Variable>,
 }
 
@@ -66,6 +69,7 @@ impl Script for () {
 pub struct EelTransformation {
     // Arc because EelUnit is not cloneable
     eel_unit: Arc<EelUnit>,
+    shared_last_feedback_value: Arc<Atomic<f64>>,
     output_var: OutputVariable,
     wants_to_be_polled: bool,
 }
@@ -94,6 +98,11 @@ impl EelTransformation {
         EelTransformation::compile(eel_script, OutputVariable::X)
     }
 
+    pub fn set_last_feedback_value(&self, value: f64) {
+        self.shared_last_feedback_value
+            .store(value, Ordering::SeqCst);
+    }
+
     // Compiles the given script and creates an appropriate transformation.
     fn compile(eel_script: &str, result_var: OutputVariable) -> Result<EelTransformation, String> {
         if eel_script.trim().is_empty() {
@@ -106,6 +115,7 @@ impl EelTransformation {
         let y = vm.register_variable("y");
         let y_last = vm.register_variable("y_last");
         let y_type = vm.register_variable("y_type");
+        let last_feedback_value = vm.register_variable("realearn_last_feedback_value");
         let rel_time_var_name = "rel_time";
         let uses_rel_time = eel_script.contains(rel_time_var_name);
         let rel_time = if uses_rel_time {
@@ -122,10 +132,12 @@ impl EelTransformation {
             y,
             y_last,
             y_type,
+            last_feedback_value,
             rel_time,
         };
         let transformation = EelTransformation {
             eel_unit: Arc::new(eel_unit),
+            shared_last_feedback_value: Arc::new(Atomic::new(-1.0)),
             output_var: result_var,
             wants_to_be_polled: uses_rel_time,
         };
@@ -155,6 +167,9 @@ impl Transformation for EelTransformation {
             };
             input_var.set(input.value);
             output_var.set(output_value);
+            eel_unit
+                .last_feedback_value
+                .set(self.shared_last_feedback_value.load(Ordering::SeqCst));
             eel_unit.y_last.set(additional_input.y_last);
             if let Some(rel_time_var) = eel_unit.rel_time {
                 rel_time_var.set(input.meta_data.rel_time.as_millis() as _);

main/src/domain/main_processor.rs

@@ -3751,6 +3751,16 @@ impl<EH: DomainEventHandler> Basics<EH> {
                                     if let Some(final_feedback_value) =
                                         feedback_collector.process(preliminary_feedback_value)
                                     {
+                                        if let Some(t) = &m.mode().settings().control_transformation
+                                        {
+                                            if let Some(numeric_fb_value) =
+                                                value.feedback_value().to_numeric()
+                                            {
+                                                t.set_last_feedback_value(
+                                                    numeric_fb_value.value.to_unit_value().get(),
+                                                );
+                                            }
+                                        }
                                         self.send_direct_feedback(
                                             feedback_reason,
                                             feedback_value.cause,