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-rw-r--r--src/rtl_power.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/rtl_power.c b/src/rtl_power.c
index 04152fa..68b6fed 100644
--- a/src/rtl_power.c
+++ b/src/rtl_power.c
@@ -219,6 +219,13 @@ int cic_9_tables[][10] = {
{9, -199, -362, 5303, -25505, 77489, -25505, 5303, -362, -199},
};
+#ifdef _MSC_VER
+double log2(double n)
+{
+ return log(n) / log(2.0);
+}
+#endif
+
/* FFT based on fix_fft.c by Roberts, Slaney and Bouras
http://www.jjj.de/fft/fftpage.html
16 bit ints for everything