src/mathutils.c: freqtobin and bintofreq to not produce negative values

diff --git a/src/mathutils.c b/src/mathutils.c
index 74063a27a1fd2672137371b50eb5d6aa1abfa418..b0a958b9dde1e2cb977c69ce563121e72b4d56a5 100644 (file)
--- a/src/mathutils.c
+++ b/src/mathutils.c
@@ -421,7 +421,7 @@ smpl_t
 aubio_bintofreq (smpl_t bin, smpl_t samplerate, smpl_t fftsize)
 {
   smpl_t freq = samplerate / fftsize;
-  return freq * bin;
+  return freq * MAX(bin, 0);
 }
 
 smpl_t
@@ -435,7 +435,7 @@ smpl_t
 aubio_freqtobin (smpl_t freq, smpl_t samplerate, smpl_t fftsize)
 {
   smpl_t bin = fftsize / samplerate;
-  return freq * bin;
+  return MAX(freq, 0) * bin;
 }
 
 smpl_t