From 9a1e306791360a19ebea01e8b59c585b24fb585c Mon Sep 17 00:00:00 2001
From: kevin <kevin@larke.org>
Date: Sun, 8 Jan 2023 14:17:15 -0500
Subject: [PATCH] cwDsp.h: Initial implementation of ampl_to_db() and
 db_to_ampl()

---
 cwDsp.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/cwDsp.h b/cwDsp.h
index da6feb8..f44de65 100644
--- a/cwDsp.h
+++ b/cwDsp.h
@@ -16,6 +16,15 @@ namespace cw
     typedef std::complex<double> complex_d_t;
     typedef std::complex<float>  complex_f_t;
 
+    template< typename T >
+    T ampl_to_db( T ampl, T ref=1.0, T minDb=-200.0 )
+    { return ampl<1e-10 ? minDb : 20.0 * log10(ampl/ref); }
+
+    template< typename T >
+    T db_to_ampl( T db )
+    { return pow(10.0,db/20.0); }
+    
+
     //---------------------------------------------------------------------------------------------------------------------------------
     // Window functions
     //