1 /*
2 * Copyright 2012 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package org.jboss.netty.handler.codec.rtsp;
17
18 import org.jboss.netty.buffer.ChannelBuffer;
19 import org.jboss.netty.channel.Channel;
20 import org.jboss.netty.channel.ChannelHandler.Sharable;
21 import org.jboss.netty.channel.ChannelHandlerContext;
22 import org.jboss.netty.handler.codec.http.HttpMessage;
23 import org.jboss.netty.handler.codec.http.HttpMessageEncoder;
24
25 /**
26 * Encodes an RTSP message represented in {@link HttpMessage} into
27 * a {@link ChannelBuffer}.
28
29 *
30 * @apiviz.landmark
31 */
32 @Sharable
33 public abstract class RtspMessageEncoder extends HttpMessageEncoder {
34
35 /**
36 * Creates a new instance.
37 */
38 protected RtspMessageEncoder() {
39 }
40
41 @Override
42 protected Object encode(ChannelHandlerContext ctx, Channel channel,
43 Object msg) throws Exception {
44 // Ignore unrelated message types such as HttpChunk.
45 if (!(msg instanceof HttpMessage)) {
46 return msg;
47 }
48 return super.encode(ctx, channel, msg);
49 }
50 }