Implement Sample for byte arrays (#35)

audio-core/src/sample.rs

@@ -10,7 +10,7 @@
 ///
 /// Implementor must make sure that a bit-pattern of all-zeros is a legal
 /// bit-pattern for the implemented type.
-pub unsafe trait Sample: Copy + Default {
+pub unsafe trait Sample: Copy {
     /// The zero pattern for the sample.
     const ZERO: Self;
 }
@@ -69,3 +69,8 @@ impl_int!(i64);
 impl_int!(i128);
 impl_int!(usize);
 impl_int!(isize);
+
+// Implement for byte arrays of any length
+unsafe impl<const N: usize> Sample for [u8; N] {
+    const ZERO: Self = [0; N];
+}

audio/src/tests/byte_arrays.rs

@@ -0,0 +1,11 @@
+#[test]
+fn test_byte_array() {
+    let buf: crate::buf::Interleaved<[u8; 2]> =
+        crate::interleaved![[[1, 2], [3, 4]], [[5, 6], [7, 8]]];
+
+    assert_eq!(buf.channels(), 2);
+    assert_eq!(buf.sample(0, 0).unwrap(), [1, 2]);
+    assert_eq!(buf.sample(0, 1).unwrap(), [3, 4]);
+    assert_eq!(buf.sample(1, 0).unwrap(), [5, 6]);
+    assert_eq!(buf.sample(1, 1).unwrap(), [7, 8]);
+}

audio/src/tests/mod.rs

@@ -1,3 +1,4 @@
+mod byte_arrays;
 mod copy_channel;
 mod dynamic;
 mod interleaved;