From ec1b2a62facf5bf1534da0f4b0fdec2f4e48980b Mon Sep 17 00:00:00 2001
From: Matt McPherrin <git@mcpherrin.ca>
Date: Wed, 15 Jul 2015 21:20:38 -0700
Subject: [PATCH] Expand the sine test case for a few more frequencies
---
src/lib.rs | 38 ++++++++++++++++++++------------------
1 file changed, 20 insertions(+), 18 deletions(-)
diff --git a/src/lib.rs b/src/lib.rs
index c0f28e6..7e91122 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -68,28 +68,30 @@ fn zero_data() {
}
#[test]
-fn one_sine() {
+fn sine() {
let mut buf = [0; 8000];
- // Generate a 1 second sine wave at 1800 hz
- // Using 8khz sample rate: Generate 8k samples,
- // map them into our second (zero to one):
- let step = 1. / 8000.;
- for sample in (0 .. 8000) {
- let time = sample as f32 * step;
- buf[sample] = ((time * 1800. * 2. * PI).sin()*std::i16::MAX as f32) as i16;
- }
+ for &freq in [697., 1200., 1800., 1633.].iter() {
+ // Generate a 1 second sine wave at freq hz
+ // Using 8khz sample rate: Generate 8k samples,
+ // map them into our second (zero to one):
- let p = Parameters::new(1800., 8000., 256);
- let mag1800 = p.start().add(&buf[0..256]).finish_mag();
- println!("1800: {}", mag1800);
- for freq in (0 .. 30).map(|x| (x * 100) as f32) {
- let p = Parameters::new(freq, 8000., 256);
+ let step = 1. / 8000.;
+ for sample in (0 .. 8000) {
+ let time = sample as f32 * step;
+ buf[sample] = ((time * freq * 2. * PI).sin()*std::i16::MAX as f32) as i16;
+ }
+
+ let p = Parameters::new(freq, 8000., 8000);
let mag = p.start().add(&buf[0..256]).finish_mag();
- println!("{}: {}", freq, mag);
- if freq != 1800. {
- assert!(mag1800 > 10.*mag);
+ for testfreq in (0 .. 30).map(|x| (x * 100) as f32) {
+ let p = Parameters::new(testfreq, 8000., 8000);
+ let testmag = p.start().add(&buf[0..256]).finish_mag();
+ println!("{:4}: {:12.3}", testfreq, testmag);
+ if (freq-testfreq).abs() > 100. {
+ println!("{} > 10*{}", mag, testmag);
+ assert!(mag > 10.*testmag);
+ }
}
}
-
}
--
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