From 73e106a45cd62508ef4bf163479d79ea6339f569 Mon Sep 17 00:00:00 2001
From: Justin Worthe <justin@worthe-it.co.za>
Date: Wed, 12 Jul 2017 20:35:09 +0200
Subject: Added benchmark for finding fundamental with correlation

---
 benches/transforms.rs | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 benches/transforms.rs

(limited to 'benches')

diff --git a/benches/transforms.rs b/benches/transforms.rs
new file mode 100644
index 0000000..3a4b906
--- /dev/null
+++ b/benches/transforms.rs
@@ -0,0 +1,35 @@
+#[macro_use]
+extern crate bencher;
+
+extern crate rusty_microphone;
+
+use bencher::Bencher;
+
+use std::f32::consts::PI;
+
+const SAMPLE_RATE: f32 = 44100.0;
+const FRAMES: usize = 1024;
+
+
+fn sin_arg(f: f32, t: f32, phase: f32) -> f32 {
+    2.0 as f32 * PI * f * t + phase
+}
+
+fn sample_sinusoud(amplitude: f32, frequency: f32, phase: f32) -> Vec<f32> {
+    (0..FRAMES)
+        .map(|x| {
+            let t = x as f32 / SAMPLE_RATE;
+            sin_arg(frequency, t, phase).sin() * amplitude
+        }).collect()
+}
+
+fn bench_correlation_on_sine_wave(b: &mut Bencher) {
+    let frequency = 440.0 as f32; //concert A
+    let samples = sample_sinusoud(1.0, frequency, 0.0);
+    
+    b.iter(|| {
+        rusty_microphone::transforms::find_fundamental_frequency_correlation(&samples, SAMPLE_RATE)
+    })
+}
+benchmark_group!(transforms, bench_correlation_on_sine_wave);
+benchmark_main!(transforms);
-- 
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