From c7e8efcbea13ca27f1b6f5619f05e1f79d36ba55 Mon Sep 17 00:00:00 2001 From: Jamie Bullock Date: Tue, 11 Mar 2014 18:14:45 +0000 Subject: Add xtract_midicent() convenience function to convert from frequency to MIDI cent --- src/scalar.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'src/scalar.c') diff --git a/src/scalar.c b/src/scalar.c index 2e93934..4ae3f16 100644 --- a/src/scalar.c +++ b/src/scalar.c @@ -983,4 +983,15 @@ int xtract_wavelet_f0(const double *data, const int N, const void *argv, double return XTRACT_SUCCESS; } +int xtract_midicent(const double *data, const int N, const void *argv, double *result) +{ + double f0 = *(double *)argv; + double note = 0.0; + + note = 69 + log(f0 / 440.f) * 17.31234; + note *= 100; + note = round(note); + + return XTRACT_SUCCESS; +} -- cgit v1.2.3