MediaConnection: Fix buffer size and duration redudancy

* There's no need to supply ways to mismatch the buffer duration
and size. Anything should reflect the media_format, this is at least
fixed on API level.

headers/private/media/MediaConnection.h

@@ -41,22 +41,22 @@ public:
 	bool							HasBinding() const;
 	BMediaConnection*				Binding() const;
 
+	bool							IsConnected() const;
+
 	// This allow to specify a format that will be used while
 	// connecting to another node. See BMediaClient::SetFormat.
 	void							SetAcceptedFormat(
 										const media_format& format);
 	const media_format&				AcceptedFormat() const;
 
-	// Represents the buffer size used by the media_node
-	void							SetBufferSize(size_t size);
+	// Represents the buffer size, depends on the format set or negotiated
+	// for this connection.
 	size_t							BufferSize() const;
 
-	// Represents the duration of one buffer
-	void							SetBufferDuration(bigtime_t duration);
+	// Represents the duration of one buffer depends on the format set or
+	// negotiated for this connection.
 	bigtime_t						BufferDuration() const;
 
-	bool							IsConnected() const;
-
 	// Disconnect this connection. When a connection is disconnected,
 	// it can be reused as brand new.
 	status_t						Disconnect();

src/kits/media/MediaConnection.cpp

@@ -120,15 +120,8 @@ BMediaConnection::Release()
 }
 
 
-void
-BMediaConnection::SetBufferSize(size_t size)
-{
-	CALLED();
-
-	fBufferSize = size;
-}
-
-
+// TODO: The data represented by the following two functions should be
+// automatically calculated depending on the media_format.
 size_t
 BMediaConnection::BufferSize() const
 {
@@ -138,15 +131,6 @@ BMediaConnection::BufferSize() const
 }
 
 
-void
-BMediaConnection::SetBufferDuration(bigtime_t duration)
-{
-	CALLED();
-
-	fBufferDuration = duration;
-}
-
-
 bigtime_t
 BMediaConnection::BufferDuration() const
 {