/*
* RED5 Open Source Flash Server - http://code.google.com/p/red5/
*
* Copyright 2006-2014 by respective authors (see below). All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.red5.server.stream;
import java.util.ArrayList;
import java.util.List;
import org.apache.mina.core.buffer.IoBuffer;
import org.red5.codec.IVideoStreamCodec;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Factory for video codecs. Creates and returns video codecs
*
* @author The Red5 Project
* @author Paul Gregoire (mondain@gmail.com)
*/
public class VideoCodecFactory {
/**
* Object key
*/
public static final String KEY = "videoCodecFactory";
/**
* Logger for video factory
*/
private static Logger log = LoggerFactory.getLogger(VideoCodecFactory.class);
/**
* List of available codecs
*/
private static List<IVideoStreamCodec> codecs = new ArrayList<IVideoStreamCodec>(3);
/**
* Setter for codecs
*
* @param codecs List of codecs
*/
public void setCodecs(List<IVideoStreamCodec> codecs) {
VideoCodecFactory.codecs = codecs;
}
/**
* Create and return new video codec applicable for byte buffer data
* @param data Byte buffer data
* @return Video codec
*/
public static IVideoStreamCodec getVideoCodec(IoBuffer data) {
IVideoStreamCodec result = null;
//get the codec identifying byte
int codecId = data.get() & 0x0f;
try {
switch (codecId) {
case 2: //sorenson
result = (IVideoStreamCodec) Class.forName("org.red5.codec.SorensonVideo").newInstance();
break;
case 3: //screen video
result = (IVideoStreamCodec) Class.forName("org.red5.codec.ScreenVideo").newInstance();
break;
case 6: //screen video 2
result = (IVideoStreamCodec) Class.forName("org.red5.codec.ScreenVideo2").newInstance();
break;
case 7: //avc/h.264 video
result = (IVideoStreamCodec) Class.forName("org.red5.codec.AVCVideo").newInstance();
break;
}
} catch (Exception ex) {
log.error("Error creating codec instance", ex);
}
data.rewind();
//if codec is not found do the old-style loop
if (result == null) {
for (IVideoStreamCodec storedCodec: codecs) {
IVideoStreamCodec codec;
// XXX: this is a bit of a hack to create new instances of the
// configured video codec for each stream
try {
codec = storedCodec.getClass().newInstance();
} catch (Exception e) {
log.error("Could not create video codec instance", e);
continue;
}
if (codec.canHandleData(data)) {
result = codec;
break;
}
}
}
return result;
}
// private boolean isScreenVideo(byte first) {
// log.debug("Trying ScreenVideo");
// boolean result = ((first & 0x0f) == 3);
// return result;
// }
//
// private boolean isSorenson(byte first) {
// log.debug("Trying Sorenson");
// boolean result = ((first & 0x0f) == 2);
// return result;
// }
}