From f3a4cc60d71a0083586b5498fd2498801a634d04 Mon Sep 17 00:00:00 2001
From: Justin Worthe <justin@worthe-it.co.za>
Date: Sun, 24 Sep 2017 23:03:39 +0200
Subject: Emscripten endpoint for finding fundamental frequency

IT'S ALIVE!
---
 src/transforms.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'src')

diff --git a/src/transforms.rs b/src/transforms.rs
index 55f81b6..656255b 100644
--- a/src/transforms.rs
+++ b/src/transforms.rs
@@ -236,3 +236,19 @@ pub fn align_to_rising_edge(samples: &[f32]) -> Vec<f32> {
         .cloned()
         .collect()
 }
+
+
+#[cfg(target_os = "emscripten")]
+pub mod emscripten_api {
+    #[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)
+        };
+        
+        println!("Signal is {:?}", signal_slice);
+        println!("Sample rate is {:?}Hz", sample_rate);
+        super::find_fundamental_frequency(&signal_slice, sample_rate).unwrap_or(0.0)
+    }
+}
-- 
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