From 7b213bd8b081d3d301b7a0288d030552f36d40df Mon Sep 17 00:00:00 2001
From: "5684185+vsariola@users.noreply.github.com"
 <5684185+vsariola@users.noreply.github.com>
Date: Tue, 15 Oct 2024 23:27:58 +0300
Subject: [PATCH] feat(sointu): display compressor invgain and threshold in dB

---
 CHANGELOG.md | 1 +
 patch.go     | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index fbb202b..54da48d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 ### Added
+- Compressor displays threshold and invgain in dB
 - Dragging mouse to select rectangles in the tables
 - The standalone tracker can open a MIDI port for receiving MIDI notes
   ([#166][i166])
diff --git a/patch.go b/patch.go
index 6b3c79d..a51c0f2 100644
--- a/patch.go
+++ b/patch.go
@@ -123,8 +123,12 @@ var UnitTypes = map[string]([]UnitParameter){
 		{Name: "stereo", MinValue: 0, MaxValue: 1, CanSet: true, CanModulate: false},
 		{Name: "attack", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: compressorTimeDispFunc},
 		{Name: "release", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: compressorTimeDispFunc},
-		{Name: "invgain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
-		{Name: "threshold", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true},
+		{Name: "invgain", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) {
+			return strconv.FormatFloat(20*math.Log10(128/float64(v)), 'f', 2, 64), "dB"
+		}},
+		{Name: "threshold", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) {
+			return strconv.FormatFloat(20*math.Log10(float64(v)/128), 'f', 2, 64), "dB"
+		}},
 		{Name: "ratio", MinValue: 0, MaxValue: 128, CanSet: true, CanModulate: true, DisplayFunc: func(v int) (string, string) { return formatFloat(1 - float64(v)/128), "" }}},
 	"speed": []UnitParameter{},
 	"out": []UnitParameter{