Add a constant for sample accurate automation

plugins/crisp/src/lib.rs

@@ -298,6 +298,8 @@ impl Plugin for Crisp {
     const DEFAULT_NUM_INPUTS: u32 = NUM_CHANNELS;
     const DEFAULT_NUM_OUTPUTS: u32 = NUM_CHANNELS;
 
+    const SAMPLE_ACCURATE_AUTOMATION: bool = true;
+
     fn params(&self) -> Pin<&dyn Params> {
         self.params.as_ref()
     }

plugins/examples/gain-gui/src/lib.rs

@@ -72,6 +72,7 @@ impl Plugin for Gain {
     const DEFAULT_NUM_OUTPUTS: u32 = 2;
 
     const ACCEPTS_MIDI: bool = false;
+    const SAMPLE_ACCURATE_AUTOMATION: bool = true;
 
     fn params(&self) -> Pin<&dyn Params> {
         self.params.as_ref()

plugins/examples/gain/src/lib.rs

@@ -105,6 +105,7 @@ impl Plugin for Gain {
     const DEFAULT_NUM_OUTPUTS: u32 = 2;
 
     const ACCEPTS_MIDI: bool = false;
+    const SAMPLE_ACCURATE_AUTOMATION: bool = true;
 
     fn params(&self) -> Pin<&dyn Params> {
         self.params.as_ref()

plugins/examples/sine/src/lib.rs

@@ -104,6 +104,7 @@ impl Plugin for Sine {
     const DEFAULT_NUM_OUTPUTS: u32 = 2;
 
     const ACCEPTS_MIDI: bool = true;
+    const SAMPLE_ACCURATE_AUTOMATION: bool = true;
 
     fn params(&self) -> Pin<&dyn Params> {
         self.params.as_ref()

plugins/examples/stft/src/lib.rs

@@ -102,6 +102,7 @@ impl Plugin for Stft {
     const DEFAULT_NUM_OUTPUTS: u32 = 2;
 
     const ACCEPTS_MIDI: bool = false;
+    const SAMPLE_ACCURATE_AUTOMATION: bool = true;
 
     fn params(&self) -> Pin<&dyn Params> {
         self.params.as_ref()

plugins/puberty_simulator/src/lib.rs

@@ -153,8 +153,6 @@ impl Plugin for PubertySimulator {
     const DEFAULT_NUM_INPUTS: u32 = 2;
     const DEFAULT_NUM_OUTPUTS: u32 = 2;
 
-    const ACCEPTS_MIDI: bool = false;
-
     fn params(&self) -> Pin<&dyn Params> {
         self.params.as_ref()
     }

src/plugin.rs

@@ -48,6 +48,13 @@ pub trait Plugin: Default + Send + Sync + 'static {
     /// Whether the plugin accepts note events. If this is set to `false`, then the plugin won't
     /// receive any note events.
     const ACCEPTS_MIDI: bool = false;
+    /// If enabled, the audio processing cycle may be split up into multiple smaller chunks if
+    /// parameter values change occur in the middle of the buffer. Depending on the host these
+    /// blocks may be as small as a single sample. Bitwig Studio sends at most one parameter change
+    /// every 64 samples.
+    ///
+    /// TODO: Implement this for VST3, this currently is only implemetned for CLAP.
+    const SAMPLE_ACCURATE_AUTOMATION: bool = false;
 
     /// The plugin's parameters. The host will update the parameter values before calling
     /// `process()`. These parameters are identified by strings that should never change when the