1 files changed, 18 insertions, 6 deletions
diff --git a/src/codec.rs b/src/codec.rs
index 03cdf15..8b38a9b 100644
--- a/src/codec.rs
+++ b/src/codec.rs
@@ -1,14 +1,26 @@
+/// Codecs enable the concealment of payload data inside the data of a carrier.
 pub trait Codec {
+    /// Data type representing the carrier.
     type Carrier;
+
+    /// Data type representing the payload.
     type Payload;
+
+    /// Data type representing encoder output/decoder input (usually the same as the carrier).
     type Output;
+
+    /// Type of errors produced by this codec.
     type Error;
 
-    fn encode(
-        &self,
-        carrier: impl Into<Self::Carrier>,
-        payload: impl Into<Self::Payload>,
-    ) -> Result<Self::Output, Self::Error>;
+    /// Embeds payload data inside carrier, returning the result.
+    fn encode<C, P>(&self, carrier: C, payload: P) -> Result<Self::Output, Self::Error>
+    where
+        C: Into<Self::Carrier>,
+        P: Into<Self::Payload>;
 
-    fn decode(&self, encoded: impl Into<Self::Output>) -> Result<(Self::Carrier, Self::Payload), Self::Error>;
+    /// Extracts payload data from an encoded carrier, returning the carrier with data removed and the
+    /// payload data.
+    fn decode<E>(&self, encoded: E) -> Result<(Self::Carrier, Self::Payload), Self::Error>
+    where
+        E: Into<Self::Output>;
 }