/**
* Decodes packet header.
*
* @param in Input IoBuffer
* @param lastHeader Previous header
* @return Decoded header
*/
public static Header decodeHeader(IoBuffer in, Header lastHeader) {
if (log.isTraceEnabled()) {
log.trace("decodeHeader - lastHeader: {} buffer: {}", lastHeader, in);
}
byte headerByte = in.get();
int headerValue;
int byteCount = 1;
if ((headerByte & 0x3f) == 0) {
// Two byte header
headerValue = (headerByte & 0xff) << 8 | (in.get() & 0xff);
byteCount = 2;
} else if ((headerByte & 0x3f) == 1) {
// Three byte header
headerValue = (headerByte & 0xff) << 16 | (in.get() & 0xff) << 8 | (in.get() & 0xff);
byteCount = 3;
} else {
// Single byte header
headerValue = headerByte & 0xff;
byteCount = 1;
}
final int channelId = RTMPUtils.decodeChannelId(headerValue, byteCount);
final int headerSize = RTMPUtils.decodeHeaderSize(headerValue, byteCount);
Header header = new Header();
header.setChannelId(channelId);
if (headerSize != HEADER_NEW && lastHeader == null) {
log.error("Last header null not new, headerSize: {}, channelId {}", headerSize, channelId);
// this will trigger an error status, which in turn will disconnect the "offending" flash
// player
// preventing a memory leak and bringing the whole server to its knees
return null;
}
int timeValue;
switch (headerSize) {
case HEADER_NEW:
// an absolute time value
timeValue = RTMPUtils.readUnsignedMediumInt(in);
header.setSize(RTMPUtils.readUnsignedMediumInt(in));
header.setDataType(in.get());
header.setStreamId(RTMPUtils.readReverseInt(in));
if (timeValue == 0xffffff) {
timeValue = (int) (in.getUnsignedInt() & Integer.MAX_VALUE);
header.setExtendedTimestamp(timeValue);
}
header.setTimerBase(timeValue);
header.setTimerDelta(0);
break;
case HEADER_SAME_SOURCE:
// a delta time value
timeValue = RTMPUtils.readUnsignedMediumInt(in);
header.setSize(RTMPUtils.readUnsignedMediumInt(in));
header.setDataType(in.get());
header.setStreamId(lastHeader.getStreamId());
if (timeValue == 0xffffff) {
timeValue = (int) (in.getUnsignedInt() & Integer.MAX_VALUE);
header.setExtendedTimestamp(timeValue);
} else if (timeValue == 0 && header.getDataType() == TYPE_AUDIO_DATA) {
// header.setIsGarbage(true);
log.trace(
"Audio with zero delta; setting to garbage; ChannelId: {}; DataType: {}; HeaderSize: {}",
new Object[] {header.getChannelId(), header.getDataType(), headerSize});
}
header.setTimerBase(lastHeader.getTimerBase());
header.setTimerDelta(timeValue);
break;
case HEADER_TIMER_CHANGE:
// a delta time value
timeValue = RTMPUtils.readUnsignedMediumInt(in);
header.setSize(lastHeader.getSize());
header.setDataType(lastHeader.getDataType());
header.setStreamId(lastHeader.getStreamId());
if (timeValue == 0xffffff) {
timeValue = (int) (in.getUnsignedInt() & Integer.MAX_VALUE);
header.setExtendedTimestamp(timeValue);
} else if (timeValue == 0 && header.getDataType() == TYPE_AUDIO_DATA) {
// header.setIsGarbage(true);
log.trace(
"Audio with zero delta; setting to garbage; ChannelId: {}; DataType: {}; HeaderSize: {}",
new Object[] {header.getChannelId(), header.getDataType(), headerSize});
}
header.setTimerBase(lastHeader.getTimerBase());
header.setTimerDelta(timeValue);
break;
case HEADER_CONTINUE:
header.setSize(lastHeader.getSize());
header.setDataType(lastHeader.getDataType());
header.setStreamId(lastHeader.getStreamId());
header.setTimerBase(lastHeader.getTimerBase());
header.setTimerDelta(lastHeader.getTimerDelta());
if (lastHeader.getExtendedTimestamp() != 0) {
timeValue = (int) (in.getUnsignedInt() & Integer.MAX_VALUE);
header.setExtendedTimestamp(timeValue);
log.trace("HEADER_CONTINUE with extended timestamp: {}", timeValue);
}
break;
default:
log.error("Unexpected header size: {}", headerSize);
return null;
}
log.trace("CHUNK, D, {}, {}", header, headerSize);
return header;
}
public void process() throws IOException {
while (true) {
IoBuffer totalBuffer = IoBuffer.allocate(0);
totalBuffer.setAutoExpand(true);
byte headerByte = get();
totalBuffer.put(headerByte);
int headerValue;
int byteCount;
if ((headerByte & 0x3f) == 0) {
byte b1 = get();
totalBuffer.put(b1);
headerValue = (headerByte & 0xff) << 8 | (b1 & 0xff);
byteCount = 2;
} else if ((headerByte & 0x3f) == 1) {
byte b1 = get();
byte b2 = get();
totalBuffer.put(b1);
totalBuffer.put(b2);
headerValue = (headerByte & 0xff) << 16 | (b1 & 0xff) << 8 | (b2 & 0xff);
byteCount = 3;
} else {
// Single byte header
headerValue = headerByte & 0xff;
byteCount = 1;
}
final int channelId = RTMPUtils.decodeChannelId(headerValue, byteCount);
if (channelId < 0) {
throw new RuntimeException("Bad channel id: " + channelId);
}
// Get the header size and length
byte headerSize = RTMPUtils.decodeHeaderSize(headerValue, byteCount);
int headerLength = RTMPUtils.getHeaderLength(headerSize);
Header lastHeader = lastHeaders.get(channelId);
headerLength += byteCount - 1;
switch (headerSize) {
case Constants.HEADER_NEW:
case Constants.HEADER_SAME_SOURCE:
case Constants.HEADER_TIMER_CHANGE:
IoBuffer tempIo = IoBuffer.wrap(get(3));
int timeValue = RTMPUtils.readUnsignedMediumInt(tempIo);
if (timeValue == 0xffffff) {
headerLength += 4;
}
totalBuffer.put(tempIo.array());
break;
case Constants.HEADER_CONTINUE:
if (lastHeader != null && lastHeader.getExtendedTimestamp() != 0) {
headerLength += 4;
}
break;
default:
throw new RuntimeException("Unexpected header size " + headerSize + " check for error");
}
if (totalBuffer.limit() > 1) totalBuffer.put(get(headerLength - totalBuffer.limit()));
IoBuffer headerBuf = IoBuffer.wrap(totalBuffer.array(), 0, totalBuffer.limit());
final Header header = decodeHeader(headerBuf, lastHeader);
if (header == null) {
throw new RuntimeException("Header is null, check for error");
}
lastHeaders.put(channelId, header);
// check to see if this is a new packets or continue decoding an existing one
GeneratedMessage packet = lastPackets.get(channelId);
if (packet == null) {
packet = new GeneratedMessage(header.clone());
lastPackets.put(channelId, packet);
}
final IoBuffer buf = packet.getData();
final int readRemaining = header.getSize() - buf.position();
final int chunkSize = connection.getChunkSize().getSize();
final int readAmount = (readRemaining > chunkSize) ? chunkSize : readRemaining;
BufferUtils.put(buf, IoBuffer.wrap(get(readAmount)), readAmount);
if (buf.position() < header.getSize()) {
// state.continueDecoding();
continue;
}
if (buf.position() > header.getSize()) {
System.out.println("Packet size expanded from {} to {} ({})");
}
final IoBuffer rawPacketData = createRawPacketData(4096, header.clone(), buf, channelId);
executor2.execute(
new Runnable() {
@Override
public void run() {
for (MessageRawListener l : rawListeners) {
l.onMessage(rawPacketData, header.getDataType());
}
}
});
/// System.out.println("������������!");
// System.out.println("CHANNEL: " + channelId);
// System.out.println("DATA TYPE: " + header.getDataType());
lastPackets.put(channelId, null);
try {
final IRTMPEvent message = decodeMessage(packet.getHeader(), buf);
// message.setHeader(packet.getHeader());
// Unfortunately flash will, especially when resetting a video stream with a new key frame,
// sometime
// send an earlier time stamp. To avoid dropping it, we just give it the minimal increment
// since the
// last message. But to avoid relative time stamps being mis-computed, we don't reset the
// header we stored.
// final Header lastReadHeader = lastHeaders.get(channelId);
// lastHeaders.put(channelId, packet.getHeader());
// packet.setMessage(message);
// collapse the time stamps on the last packet so that it works right for chunk type 3 later
lastHeader = lastHeaders.get(channelId);
lastHeader.setTimerBase(header.getTimer());
if (message != null) {
switch (header.getDataType()) {
case TYPE_PING:
Ping ping = (Ping) message;
// Ping p = new Ping(Ping.PING_CLIENT);
// Header hd = new Header();
// hd.setDataType((byte)TYPE_PING);
// writer.write(encoder.encodeEvent(hd, p).array());
System.out.println("PING TYPE: " + ping.getEventType());
if (ping.getEventType() == Ping.PING_CLIENT) {
try {
Ping pong = new Ping(Ping.PONG_SERVER);
pong.setTimestamp((int) (System.currentTimeMillis() & 0xffffffff));
writer.write(encoder.encodeEvent(header, pong).array());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
break;
case TYPE_CHUNK_SIZE:
ChunkSize chunkSIZE = (ChunkSize) message;
if (connection.isAutoMutableChunkSize()) {
connection.setChunkSize(chunkSIZE);
}
break;
}
}
// System.out.println("HEADER SIZE: " + header.getSize());
// System.out.println("DATA TIME: " + header.getDataType());
// System.out.println("CHANNEL ID: " + header.getChannelId());
// System.out.println("TIMESTAMP: " + header.getTimer());
} finally {
lastPackets.put(channelId, null);
}
}
}
