byte[] GetMessageBytes(RtmpMessage message, Action <AmfWriter, RtmpMessage> handler)
{
using (var stream = new MemoryStream())
using (var messageWriter = new AmfWriter(stream, writer.SerializationContext, objectEncoding))
{
handler(messageWriter, message);
return(stream.ToArray());
}
}
void WriteData(AmfWriter writer, RtmpMessage o, ObjectEncoding encoding)
{
if (o is Command)
{
WriteCommandOrData(writer, o, encoding);
}
else if (o is ByteData)
{
writer.WriteBytes(((ByteData)o).Data);
}
}
public void Queue(RtmpMessage message, int streamId, int messageStreamId)
{
var header = new RtmpHeader();
var packet = new RtmpPacket(header, message);
header.StreamId = streamId;
header.Timestamp = message.Timestamp;
header.MessageStreamId = messageStreamId;
header.MessageType = message.MessageType;
if (message.Header != null)
{
header.IsTimerRelative = message.Header.IsTimerRelative;
}
queuedPackets.Enqueue(packet);
// packetAvailableEvent.Set();
Interlocked.Exchange(ref packetAvailable, 1);
}
/// <summary>
/// 写入命令或数据
/// </summary>
/// <param name="writer"></param>
/// <param name="o"></param>
/// <param name="encoding"></param>
void WriteCommandOrData(AmfWriter writer, RtmpMessage o, ObjectEncoding encoding)
{
var command = o as Command;
var methodCall = command.MethodCall;
var isInvoke = command is Invoke;
// write the method name or result type (first section)
var isRequest = methodCall.CallStatus == CallStatus.Request;
if (isRequest)
{
writer.WriteAmfItem(encoding, methodCall.Name);
}
else
{
writer.WriteAmfItem(encoding, methodCall.IsSuccess ? "_result" : "_error");
}
if (methodCall.Name == "@setDataFrame")
{
writer.WriteAmfItem(encoding, command.ConnectionParameters);
}
if (isInvoke)
{
writer.WriteAmfItem(encoding, command.InvokeId);
writer.WriteAmfItem(encoding, command.ConnectionParameters);
if (!methodCall.IsSuccess)
{
methodCall.Parameters = new object[] { new StatusAsObject(StatusCode.CallFailed, "error", "Call failed.") }
}
;
}
// write arguments
foreach (var arg in methodCall.Parameters)
{
writer.WriteAmfItem(encoding, arg);
}
}
}
public RtmpPacket(RtmpHeader header, RtmpMessage body) : this(header)
{
Body = body;
Length = header.PacketLength;
}
public RtmpPacket(RtmpMessage body)
{
Body = body;
}
void WriteProtocolControlMessage(RtmpMessage @event)
{
Writer.Queue(@event, CONTROL_CSID, 0);
}
public void SendAmf0Data(RtmpMessage e)
{
//var timestamp = (int)(DateTime.UtcNow - connectTime).TotalMilliseconds;
//e.Timestamp = timestamp;
Writer.Queue(e, StreamID, _random.Next());
}
byte[] GetMessageBytes(RtmpHeader header, RtmpMessage message)
{
switch (header.MessageType)
{
case MessageType.SetChunkSize:
return(GetMessageBytes(message, (w, o) => w.WriteInt32(((ChunkSize)o).Size)));
case MessageType.AbortMessage:
return(GetMessageBytes(message, (w, o) => w.WriteInt32(((Abort)o).StreamId)));
case MessageType.Acknowledgement:
return(GetMessageBytes(message, (w, o) => w.WriteInt32(((Acknowledgement)o).BytesRead)));
case MessageType.UserControlMessage:
return(GetMessageBytes(message, (w, o) =>
{
var m = (UserControlMessage)o;
w.WriteUInt16((ushort)m.EventType);
foreach (var v in m.Values)
{
w.WriteInt32(v);
}
}));
case MessageType.WindowAcknowledgementSize:
return(GetMessageBytes(message, (w, o) => w.WriteInt32(((WindowAcknowledgementSize)o).Count)));
case MessageType.SetPeerBandwith:
return(GetMessageBytes(message, (w, o) =>
{
var m = (PeerBandwidth)o;
w.WriteInt32(m.AcknowledgementWindowSize);
w.WriteByte((byte)m.LimitType);
}));
case MessageType.Audio:
case MessageType.Video:
return(GetMessageBytes(message, (w, o) => WriteData(w, o, ObjectEncoding.Amf0)));
case MessageType.DataAmf0:
return(GetMessageBytes(message, (w, o) => WriteCommandOrData(w, o, ObjectEncoding.Amf0)));
case MessageType.SharedObjectAmf0:
return(new byte[0]); // todo: `SharedObject`s
case MessageType.CommandAmf0:
return(GetMessageBytes(message, (w, o) => WriteCommandOrData(w, o, ObjectEncoding.Amf0)));
case MessageType.DataAmf3:
return(GetMessageBytes(message, (w, o) => WriteData(w, o, ObjectEncoding.Amf3)));
case MessageType.SharedObjectAmf3:
return(new byte[0]); // todo: `SharedObject`s
case MessageType.CommandAmf3:
return(GetMessageBytes(message, (w, o) =>
{
w.WriteByte(0);
WriteCommandOrData(w, o, ObjectEncoding.Amf3);
}));
case MessageType.Aggregate:
// todo: Aggregate messages
System.Diagnostics.Debugger.Break();
return(new byte[0]); // todo: `Aggregate`
default:
throw new ArgumentOutOfRangeException("Unknown RTMP message type: " + (int)header.MessageType);
}
}
