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/*
* RED5 Open Source Media Server - https://github.com/Red5/
*
* Copyright 2006-2016 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.net.rtmp.event;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.util.LinkedList;
import org.apache.mina.core.buffer.IoBuffer;
import org.red5.io.IoConstants;
import org.red5.io.utils.IOUtils;
import org.red5.server.api.stream.IStreamPacket;
import org.red5.server.net.rtmp.message.Header;
import org.red5.server.stream.IStreamData;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Aggregate data event
*/
public class Aggregate extends BaseEvent implements IoConstants, IStreamData, IStreamPacket {
private static final long serialVersionUID = 5538859593815804830L;
private static Logger log = LoggerFactory.getLogger(Aggregate.class);
/**
* Data
*/
protected IoBuffer data;
/**
* Data type
*/
private byte dataType = TYPE_AGGREGATE;
/** Constructs a new Aggregate. */
public Aggregate() {
this(IoBuffer.allocate(0).flip());
}
/**
* Create aggregate data event with given data buffer.
*
* @param data
* data
*/
public Aggregate(IoBuffer data) {
super(Type.STREAM_DATA);
setData(data);
}
/**
* Create aggregate data event with given data buffer.
*
* @param data
* aggregate data
* @param copy
* true to use a copy of the data or false to use reference
*/
public Aggregate(IoBuffer data, boolean copy) {
super(Type.STREAM_DATA);
if (copy) {
byte[] array = new byte[data.limit()];
data.mark();
data.get(array);
data.reset();
setData(array);
} else {
setData(data);
}
}
/** {@inheritDoc} */
@Override
public byte getDataType() {
return dataType;
}
public void setDataType(byte dataType) {
this.dataType = dataType;
}
/** {@inheritDoc} */
public IoBuffer getData() {
return data;
}
public void setData(IoBuffer data) {
this.data = data;
}
public void setData(byte[] data) {
this.data = IoBuffer.allocate(data.length);
this.data.put(data).flip();
}
/**
* Breaks-up the aggregate into its individual parts and returns them as a list. The parts are returned based on the ordering of the aggregate itself.
*
* @return list of IRTMPEvent objects
*/
public LinkedList getParts() {
LinkedList parts = new LinkedList();
log.trace("Aggregate data length: {}", data.limit());
int position = data.position();
do {
try {
// read the header
//log.trace("Hex: {}", data.getHexDump());
byte subType = data.get();
// when we run into subtype 0 break out of here
if (subType == 0) {
log.debug("Subtype 0 encountered within this aggregate, processing with exit");
break;
}
int size = IOUtils.readUnsignedMediumInt(data);
log.debug("Data subtype: {} size: {}", subType, size);
// TODO ensure the data contains all the bytes to support the specified size
int timestamp = IOUtils.readExtendedMediumInt(data);
/*timestamp = ntohap((GETIBPOINTER(buffer) + 4)); 0x12345678 == 34 56 78 12*/
int streamId = IOUtils.readUnsignedMediumInt(data);
log.debug("Data timestamp: {} stream id: {}", timestamp, streamId);
Header partHeader = new Header();
partHeader.setChannelId(header.getChannelId());
partHeader.setDataType(subType);
partHeader.setSize(size);
// use the stream id from the aggregate's header
partHeader.setStreamId(header.getStreamId());
partHeader.setTimer(timestamp);
// timer delta == time stamp - timer base
// the back pointer may be used to verify the size of the individual part
// it will be equal to the data size + header size
int backPointer = 0;
switch (subType) {
case TYPE_AUDIO_DATA:
AudioData audio = new AudioData(data.getSlice(size));
audio.setTimestamp(timestamp);
audio.setHeader(partHeader);
log.debug("Audio header: {}", audio.getHeader());
parts.add(audio);
//log.trace("Hex: {}", data.getHexDump());
// ensure 4 bytes left to read an int
if (data.position() < data.limit() - 4) {
backPointer = data.getInt();
//log.trace("Back pointer: {}", backPointer);
if (backPointer != (size + 11)) {
log.debug("Data size ({}) and back pointer ({}) did not match", size, backPointer);
}
}
break;
case TYPE_VIDEO_DATA:
VideoData video = new VideoData(data.getSlice(size));
video.setTimestamp(timestamp);
video.setHeader(partHeader);
log.debug("Video header: {}", video.getHeader());
parts.add(video);
//log.trace("Hex: {}", data.getHexDump());
// ensure 4 bytes left to read an int
if (data.position() < data.limit() - 4) {
backPointer = data.getInt();
//log.trace("Back pointer: {}", backPointer);
if (backPointer != (size + 11)) {
log.debug("Data size ({}) and back pointer ({}) did not match", size, backPointer);
}
}
break;
default:
log.debug("Non-A/V subtype: {}", subType);
Unknown unk = new Unknown(subType, data.getSlice(size));
unk.setTimestamp(timestamp);
unk.setHeader(partHeader);
parts.add(unk);
// ensure 4 bytes left to read an int
if (data.position() < data.limit() - 4) {
backPointer = data.getInt();
}
}
position = data.position();
} catch (Exception e) {
log.error("Exception decoding aggregate parts", e);
break;
}
log.trace("Data position: {}", position);
} while (position < data.limit());
log.trace("Aggregate processing complete, {} parts extracted", parts.size());
return parts;
}
/** {@inheritDoc} */
@Override
public String toString() {
return String.format("Aggregate - ts: %s length: %s", getTimestamp(), (data != null ? data.limit() : '0'));
}
/** {@inheritDoc} */
@Override
protected void releaseInternal() {
if (data != null) {
final IoBuffer localData = data;
// null out the data first so we don't accidentally
// return a valid reference first
data = null;
localData.clear();
localData.free();
}
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
super.readExternal(in);
byte[] byteBuf = (byte[]) in.readObject();
if (byteBuf != null) {
data = IoBuffer.allocate(byteBuf.length);
data.setAutoExpand(true);
SerializeUtils.ByteArrayToByteBuffer(byteBuf, data);
}
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
super.writeExternal(out);
if (data != null) {
out.writeObject(SerializeUtils.ByteBufferToByteArray(data));
} else {
out.writeObject(null);
}
}
/**
* Duplicate this message / event.
*
* @return duplicated event
*/
public Aggregate duplicate() throws IOException, ClassNotFoundException {
Aggregate result = new Aggregate();
// serialize
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
writeExternal(oos);
oos.close();
// convert to byte array
byte[] buf = baos.toByteArray();
baos.close();
// create input streams
ByteArrayInputStream bais = new ByteArrayInputStream(buf);
ObjectInputStream ois = new ObjectInputStream(bais);
// deserialize
result.readExternal(ois);
ois.close();
bais.close();
// clone the header if there is one
if (header != null) {
result.setHeader(header.clone());
}
return result;
}
}
