Add the data needed for the analyzer to Data

Cargo.lock

@@ -3756,6 +3756,7 @@ dependencies = [
 name = "spectral_compressor"
 version = "0.3.0"
 dependencies = [
+ "atomic_float",
  "crossbeam",
  "nih_plug",
  "nih_plug_vizia",

plugins/spectral_compressor/Cargo.toml

@@ -16,6 +16,7 @@ nih_plug_vizia = { path = "../../nih_plug_vizia" }
 realfft = "3.0"
 
 # For the GUI
+atomic_float = "0.1"
 crossbeam = "0.8"
 open = "3.0"
 serde = { version = "1.0", features = ["derive"] }

plugins/spectral_compressor/src/editor.rs

@@ -14,15 +14,17 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+use atomic_float::AtomicF32;
 use crossbeam::atomic::AtomicCell;
 use nih_plug::prelude::*;
 use nih_plug_vizia::vizia::prelude::*;
 use nih_plug_vizia::widgets::*;
 use nih_plug_vizia::{assets, create_vizia_editor, ViziaState, ViziaTheming};
 use serde::{Deserialize, Serialize};
-use std::sync::Arc;
+use std::sync::{Arc, Mutex};
 
 use self::mode_button::EditorModeButton;
+use crate::analyzer::AnalyzerData;
 use crate::{SpectralCompressor, SpectralCompressorParams};
 
 mod mode_button;
@@ -52,11 +54,16 @@ pub enum EditorMode {
     AnalyzerVisible,
 }
 
-#[derive(Lens)]
-struct Data {
-    params: Arc<SpectralCompressorParams>,
+#[derive(Clone, Lens)]
+pub struct Data {
+    pub(crate) params: Arc<SpectralCompressorParams>,
 
-    editor_mode: Arc<AtomicCell<EditorMode>>,
+    /// Determines which parts of the GUI are visible, and in turn decides the GUI's size.
+    pub(crate) editor_mode: Arc<AtomicCell<EditorMode>>,
+
+    pub(crate) analyzer_data: Arc<Mutex<triple_buffer::Output<AnalyzerData>>>,
+    /// Used by the analyzer to determine which FFT bins belong to which frequencies.
+    pub(crate) sample_rate: Arc<AtomicF32>,
 }
 
 impl Model for Data {}
@@ -69,20 +76,12 @@ pub(crate) fn default_state(editor_mode: Arc<AtomicCell<EditorMode>>) -> Arc<Viz
     })
 }
 
-pub(crate) fn create(
-    params: Arc<SpectralCompressorParams>,
-    editor_state: Arc<ViziaState>,
-) -> Option<Box<dyn Editor>> {
+pub(crate) fn create(editor_state: Arc<ViziaState>, editor_data: Data) -> Option<Box<dyn Editor>> {
     create_vizia_editor(editor_state, ViziaTheming::Custom, move |cx, _| {
         assets::register_noto_sans_light(cx);
         assets::register_noto_sans_thin(cx);
 
-        Data {
-            params: params.clone(),
-
-            editor_mode: params.editor_mode.clone(),
-        }
-        .build(cx);
+        editor_data.clone().build(cx);
 
         ResizeHandle::new(cx);
 

plugins/spectral_compressor/src/lib.rs

@@ -15,12 +15,14 @@
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 use analyzer::AnalyzerData;
+use atomic_float::AtomicF32;
 use crossbeam::atomic::AtomicCell;
 use editor::EditorMode;
 use nih_plug::prelude::*;
 use nih_plug_vizia::ViziaState;
 use realfft::num_complex::Complex32;
 use realfft::{ComplexToReal, RealFftPlanner, RealToComplex};
+use std::sync::atomic::Ordering;
 use std::sync::{Arc, Mutex};
 use triple_buffer::TripleBuffer;
 
@@ -54,6 +56,9 @@ pub struct SpectralCompressor {
 
     /// The current buffer config, used for updating the compressors.
     buffer_config: BufferConfig,
+    /// The current sample rate. Stores the same information as in `BufferConfig`, but this can be
+    /// shared with the editor where it's used to compute frequencies for the spectrum analyzer.
+    sample_rate: Arc<AtomicF32>,
 
     /// An adapter that performs most of the overlap-add algorithm for us.
     stft: util::StftHelper<1>,
@@ -166,6 +171,7 @@ impl Default for SpectralCompressor {
                 max_buffer_size: 0,
                 process_mode: ProcessMode::Realtime,
             },
+            sample_rate: Arc::new(AtomicF32::new(1.0)),
 
             // These three will be set to the correct values in the initialize function
             stft: util::StftHelper::new(2, MAX_WINDOW_SIZE, 0),
@@ -311,7 +317,17 @@ impl Plugin for SpectralCompressor {
     }
 
     fn editor(&self, _async_executor: AsyncExecutor<Self>) -> Option<Box<dyn Editor>> {
-        editor::create(self.params.clone(), self.params.editor_state.clone())
+        editor::create(
+            self.params.editor_state.clone(),
+            editor::Data {
+                params: self.params.clone(),
+
+                editor_mode: self.params.editor_mode.clone(),
+
+                analyzer_data: self.analyzer_output_data.clone(),
+                sample_rate: self.sample_rate.clone(),
+            },
+        )
     }
 
     fn initialize(
@@ -323,6 +339,10 @@ impl Plugin for SpectralCompressor {
         // Needed to update the compressors later
         self.buffer_config = *buffer_config;
 
+        // And this is used in the editor to draw the analyzer
+        self.sample_rate
+            .store(buffer_config.sample_rate, Ordering::Relaxed);
+
         // This plugin can accept a variable number of audio channels, so we need to resize
         // channel-dependent data structures accordingly
         let num_output_channels = audio_io_layout