1 files changed, 24 insertions, 0 deletions
diff --git a/third_party/rust/cubeb/src/sample.rs b/third_party/rust/cubeb/src/sample.rs
new file mode 100644
index 0000000000..7d4dc7d475
--- /dev/null
+++ b/third_party/rust/cubeb/src/sample.rs
@@ -0,0 +1,24 @@
+// Copyright © 2017-2018 Mozilla Foundation
+//
+// This program is made available under an ISC-style license.  See the
+// accompanying file LICENSE for details.
+
+/// An extension trait which allows the implementation of converting
+/// void* buffers from libcubeb-sys into rust slices of the appropriate
+/// type.
+pub trait Sample: Send + Copy {
+    /// Map f32 in range [-1,1] to sample type
+    fn from_float(_: f32) -> Self;
+}
+
+impl Sample for i16 {
+    fn from_float(x: f32) -> i16 {
+        (x * f32::from(i16::max_value())) as i16
+    }
+}
+
+impl Sample for f32 {
+    fn from_float(x: f32) -> f32 {
+        x
+    }
+}