Auto-disable Diopser safe mode for older instances

Since this used to not do anything.

plugins/diopser/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "diopser"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 authors = ["Robbert van der Helm <mail@robbertvanderhelm.nl>"]
 license = "GPL-3.0-or-later"
@@ -20,6 +20,7 @@ nih_plug = { path = "../../", features = ["assert_process_allocs"] }
 nih_plug_vizia = { path = "../../nih_plug_vizia" }
 
 atomic_float = "0.1"
+semver = "1.0.14"
 
 # For the GUI
 realfft = "3.0"

plugins/diopser/src/lib.rs

@@ -137,6 +137,19 @@ impl Plugin for Diopser {
         )
     }
 
+    fn filter_state(state: &mut PluginState) {
+        // Safe-mode is enabled by default, so to avoid changing the behavior we'll keep it disabled
+        // for older presets
+        if semver::Version::parse(&state.version)
+            .map(|version| version < semver::Version::parse("0.4.0").unwrap())
+            .unwrap_or(true)
+        {
+            state
+                .fields
+                .insert(String::from("safe-mode"), String::from("false"));
+        }
+    }
+
     fn accepts_bus_config(&self, config: &BusConfig) -> bool {
         // The SIMD version only supports stereo
         config.num_input_channels == config.num_output_channels && config.num_input_channels == 2