math: Add dB_to_lin() and lin_to_dB()

These are simply shorthands, but make the code a little more readable
with respect to intent. It allows to replace

    const double power_db = 10 * std::log10(power_lin);

with

    const double power_db = lin_to_dB(power_lin);

which expresses the intent a little more clearly and concisely.

1 files changed, 11 insertions, 0 deletions

diff --git a/host/include/uhd/utils/math.hpp b/host/include/uhd/utils/math.hpp
index aca0b7c92..d442d6a94 100644
--- a/host/include/uhd/utils/math.hpp
+++ b/host/include/uhd/utils/math.hpp
@@ -234,6 +234,17 @@ UHD_INLINE bool frequencies_are_equal(double lhs, double rhs)
             == fp_compare::fp_compare_delta<double>(rhs, FREQ_COMPARISON_DELTA_HZ));
 }
 
+inline double dB_to_lin(const double dB_val)
+{
+    return std::pow(10, (dB_val) / 10.0);
+}
+
+inline double lin_to_dB(const double val)
+{
+    return 10 * std::log10(val);
+}
+
+
 //! Portable version of lcm() across Boost versions
 template <typename IntegerType>
 inline IntegerType lcm(IntegerType x, IntegerType y)