From 4870d0c148eb49ffeb5482ae55d9cc4c9cc89786 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Mon, 3 Jul 2017 17:20:35 +0200
Subject: Measure audio levels, add ensemble database WIP

---
 src/utils.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/utils.cpp')

diff --git a/src/utils.cpp b/src/utils.cpp
index 3e741c9..d0c1273 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -29,6 +29,8 @@
 
 #include "utils.hpp"
 #include <cstring>
+#include <cmath>
+#include <limits>
 #include <stdarg.h>
 
 using namespace std;
@@ -229,3 +231,9 @@ std::string pnum_to_str(uint16_t Programme_Number)
     }
 }
 
+int absolute_to_dB(int16_t value)
+{
+    const int16_t int16_max = std::numeric_limits<int16_t>::max();
+    return value ? round(20*log10((double)value / int16_max)) : -90;
+}
+
-- 
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