1 files changed, 60 insertions, 0 deletions
diff --git a/third_party/rust/cubeb/examples/tone.rs b/third_party/rust/cubeb/examples/tone.rs
new file mode 100644
index 0000000000..97e940bc94
--- /dev/null
+++ b/third_party/rust/cubeb/examples/tone.rs
@@ -0,0 +1,60 @@
+// Copyright © 2011 Mozilla Foundation
+//
+// This program is made available under an ISC-style license.  See the
+// accompanying file LICENSE for details.
+
+//! libcubeb api/function test. Plays a simple tone.
+extern crate cubeb;
+
+mod common;
+
+use cubeb::{MonoFrame, Sample};
+use std::f32::consts::PI;
+use std::thread;
+use std::time::Duration;
+
+const SAMPLE_FREQUENCY: u32 = 48_000;
+const STREAM_FORMAT: cubeb::SampleFormat = cubeb::SampleFormat::S16LE;
+
+type Frame = MonoFrame<i16>;
+
+fn main() {
+    let ctx = common::init("Cubeb tone example").expect("Failed to create cubeb context");
+
+    let params = cubeb::StreamParamsBuilder::new()
+        .format(STREAM_FORMAT)
+        .rate(SAMPLE_FREQUENCY)
+        .channels(1)
+        .layout(cubeb::ChannelLayout::MONO)
+        .take();
+
+    let mut position = 0u32;
+
+    let mut builder = cubeb::StreamBuilder::<Frame>::new();
+    builder
+        .name("Cubeb tone (mono)")
+        .default_output(&params)
+        .latency(0x1000)
+        .data_callback(move |_, output| {
+            // generate our test tone on the fly
+            for f in output.iter_mut() {
+                // North American dial tone
+                let t1 = (2.0 * PI * 350.0 * position as f32 / SAMPLE_FREQUENCY as f32).sin();
+                let t2 = (2.0 * PI * 440.0 * position as f32 / SAMPLE_FREQUENCY as f32).sin();
+
+                f.m = i16::from_float(0.5 * (t1 + t2));
+
+                position += 1;
+            }
+            output.len() as isize
+        })
+        .state_callback(|state| {
+            println!("stream {:?}", state);
+        });
+
+    let stream = builder.init(&ctx).expect("Failed to create cubeb stream");
+
+    stream.start().unwrap();
+    thread::sleep(Duration::from_millis(500));
+    stream.stop().unwrap();
+}