diff options
Diffstat (limited to 'xtract/xtract_vector.h')
| -rw-r--r-- | xtract/xtract_vector.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/xtract/xtract_vector.h b/xtract/xtract_vector.h index e758f10..07bf176 100644 --- a/xtract/xtract_vector.h +++ b/xtract/xtract_vector.h @@ -43,6 +43,8 @@ extern "C" { * * The magnitude/power coefficients are scaled to the range 0-1 so that for a given coefficient x, 0 <= x <= 1 * + * \note Before calling xtract_spectrum(), the FFT must be initialised by calling xtract_init_fft(N, XTRACT_SPECTRUM) + * */ int xtract_spectrum(const float *data, const int N, const void *argv, float *result); |