/* NAME filter.go AUTHORS Ella Pietraroia <ella@ausocean.org> LICENSE filter.go is Copyright (C) 2019 the Australian Ocean Lab (AusOcean) It is free software: you can redistribute it and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. It is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License in gpl.txt. If not, see http://www.gnu.org/licenses. */ // Package filter provides the interface and implementations of the filters to be used // on video input that has been lexed. package filter import ( "io" ) // Interface for all filters. type Filter interface { io.WriteCloser //NB: Filter interface may evolve with more methods as required. } // The NoOp filter will perform no operation on the data that is being recieved, // it will pass it on to the encoder with no changes. type NoOp struct { dst io.Writer } func NewNoOp(dst io.Writer) *NoOp { return &NoOp{dst: dst} } func (n *NoOp) Write(p []byte) (int, error) { return n.dst.Write(p) } func (n *NoOp) Close() error { return nil }