From 3577d67264f9700417e1729c16c3623d804d3298 Mon Sep 17 00:00:00 2001
From: KubaPro010 <kuba.pro010@gmail.com>
Date: Mon, 29 Dec 2025 21:46:41 +0100
Subject: [PATCH] make dbr calculation precise

---
 .vscode/c_cpp_properties.json | 22 ++++++++++++++++++++++
 filter/bs412.c                |  2 +-
 2 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 .vscode/c_cpp_properties.json

diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
new file mode 100644
index 0000000..0211f69
--- /dev/null
+++ b/.vscode/c_cpp_properties.json
@@ -0,0 +1,22 @@
+{
+    "configurations": [
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "C:\\lua\\*"
+            ],
+            "defines": [
+                "_DEBUG",
+                "UNICODE",
+                "_UNICODE"
+            ],
+            "windowsSdkVersion": "10.0.26100.0",
+            "compilerPath": "cl.exe",
+            "cStandard": "c17",
+            "cppStandard": "c++17",
+            "intelliSenseMode": "windows-msvc-x64"
+        }
+    ],
+    "version": 4
+}
\ No newline at end of file
diff --git a/filter/bs412.c b/filter/bs412.c
index 5fe378e..9e34ade 100644
--- a/filter/bs412.c
+++ b/filter/bs412.c
@@ -8,7 +8,7 @@ inline float dbr_to_deviation(float dbr) {
 
 inline float deviation_to_dbr(float deviation) {
 	if (deviation < 1e-6f) return -100.0f;
-	return 10.0f * (log2f(deviation) - LOG2_19000) * 0.30103f;
+	return 10*log10f(deviation/19000);
 }
 
 void init_bs412(BS412Compressor* mpx, uint32_t mpx_deviation, float target_power, float attack, float release, float max, uint32_t sample_rate) {