dep: Add cubeb

dep/cubeb/src/cubeb_utils.cpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright © 2018 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+
+#include "cubeb_utils.h"
+
+size_t cubeb_sample_size(cubeb_sample_format format)
+{
+  switch (format) {
+    case CUBEB_SAMPLE_S16LE:
+    case CUBEB_SAMPLE_S16BE:
+      return sizeof(int16_t);
+    case CUBEB_SAMPLE_FLOAT32LE:
+    case CUBEB_SAMPLE_FLOAT32BE:
+      return sizeof(float);
+    default:
+      // should never happen as all cases are handled above.
+      assert(false);
+  }
+}