From 669987f0ebd01963d0eb52849fd4f16640350232 Mon Sep 17 00:00:00 2001 From: Justin Worthe Date: Mon, 16 Oct 2017 21:57:54 +0200 Subject: Added correlation function which updated array in place --- src/emscripten_api.rs | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/emscripten_api.rs b/src/emscripten_api.rs index c371d86..0f1bcc7 100644 --- a/src/emscripten_api.rs +++ b/src/emscripten_api.rs @@ -2,10 +2,10 @@ use transforms; use std::os::raw::c_char; use std::ffi::CString; +use std::slice; #[no_mangle] pub extern "C" fn find_fundamental_frequency(signal: *const f32, signal_length: isize, sample_rate: f32) -> f32 { - use std::slice; let signal_slice = unsafe { &slice::from_raw_parts(signal, signal_length as usize) }; @@ -25,3 +25,18 @@ pub extern "C" fn hz_to_pitch(hz: f32) -> *mut c_char { .unwrap() .into_raw() } + +#[no_mangle] +pub extern "C" fn correlation(signal: *mut f32, signal_length: isize) { + let signal_slice = unsafe { + &slice::from_raw_parts(signal, signal_length as usize) + }; + + let correlated_signal = transforms::correlation(&signal_slice); + + unsafe { + for (i, cor) in correlated_signal.iter().enumerate() { + *signal.offset(i as isize) = *cor; + } + } +} -- cgit v1.2.3