bool SendSecureTokenResponse(string resp)
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; /* control channel (invoke) */
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.Invoke;
Logger.Log(string.Format("Sending SecureTokenResponse: {0}", resp));
List<byte> enc = new List<byte>();
EncodeString(enc, "secureTokenResponse");
EncodeNumber(enc, 0.0);
enc.Add(0x05); // NULL
EncodeString(enc, resp);
packet.m_nBodySize = (uint)enc.Count;
packet.m_body = enc.ToArray();
return SendPacket(packet, false);
}
void HandleMetadata(RTMPPacket packet)
{
HandleMetadata(packet.m_body, 0, (int)packet.m_nBodySize);
}
bool SendPlay()
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x08; // we make 8 our stream channel
packet.HeaderType = HeaderType.Large;
packet.PacketType = PacketType.Invoke;
packet.m_nInfoField2 = m_stream_id;
packet.AllocPacket(256); // should be enough
List<byte> enc = new List<byte>();
EncodeString(enc, "play");
EncodeNumber(enc, ++m_numInvokes);
enc.Add(0x05); // NULL
EncodeString(enc, Link.playpath);
/* Optional parameters start and len.
*
* start: -2, -1, 0, positive number
* -2: looks for a live stream, then a recorded stream, if not found any open a live stream
* -1: plays a live stream
* >=0: plays a recorded streams from 'start' milliseconds
*/
if (Link.bLiveStream)
{
EncodeNumber(enc, -1000.0d);
}
else
{
if (Link.seekTime > 0.0)
EncodeNumber(enc, Link.seekTime);
else
EncodeNumber(enc, 0.0d);
}
/* len: -1, 0, positive number
* -1: plays live or recorded stream to the end (default)
* 0: plays a frame 'start' ms away from the beginning
* >0: plays a live or recoded stream for 'len' milliseconds
*/
packet.m_body = enc.ToArray();
packet.m_nBodySize = (uint)enc.Count;
Logger.Log(string.Format("Sending play: '{0}' from time: '{1}'", Link.playpath, m_channelTimestamp[m_mediaChannel]));
return SendPacket(packet);
}
void HandleChangeChunkSize(RTMPPacket packet)
{
if (packet.m_nBodySize >= 4)
{
InChunkSize = ReadInt32(packet.m_body, 0);
Logger.Log(string.Format("received: chunk size change to {0}", InChunkSize));
}
}
void HandleFlvTags(RTMPPacket packet)
{
// go through FLV packets and handle metadata packets
int pos = 0;
uint nTimeStamp = packet.m_nTimeStamp;
while (pos + 11 < packet.m_nBodySize)
{
int dataSize = ReadInt24(packet.m_body, pos + 1); // size without header (11) and prevTagSize (4)
if (pos + 11 + dataSize + 4 > packet.m_nBodySize)
{
Logger.Log("Stream corrupt?!");
break;
}
if (packet.m_body[pos] == 0x12)
{
HandleMetadata(packet.m_body, pos + 11, dataSize);
}
else if (packet.m_body[pos] == 8 || packet.m_body[pos] == 9)
{
nTimeStamp = (uint)ReadInt24(packet.m_body, pos + 4);
nTimeStamp |= (uint)(packet.m_body[pos + 7] << 24);
}
pos += (11 + dataSize + 4);
}
if (Pausing == 0) m_mediaStamp = nTimeStamp;
}
public bool SendCreateStream()
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.Invoke;
Logger.Log("Sending createStream");
packet.AllocPacket(256); // should be enough
List<byte> enc = new List<byte>();
EncodeString(enc, "createStream");
EncodeNumber(enc, ++m_numInvokes);
enc.Add(0x05); // NULL
packet.m_nBodySize = (uint)enc.Count;
packet.m_body = enc.ToArray();
return SendPacket(packet);
}
public bool SendRequestData(string id, string request)
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Large;
packet.PacketType = PacketType.Invoke_AMF3;
List<byte> enc = new List<byte>();
enc.Add(0x00);
EncodeString(enc, "requestData");
EncodeNumber(enc, 0);
enc.Add(0x05); // NULL
EncodeString(enc, id);
EncodeString(enc, request);
packet.m_body = enc.ToArray();
packet.m_nBodySize = (uint)enc.Count;
Logger.Log(string.Format("Sending requestData: ({0},{1})", id, request));
return SendPacket(packet);
}
bool SendCheckBWResult(double txn)
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.Invoke;
packet.m_nTimeStamp = (uint)(0x16 * m_nBWCheckCounter); // temp inc value. till we figure it out.
packet.AllocPacket(256); // should be enough
List<byte> enc = new List<byte>();
EncodeString(enc, "_result");
EncodeNumber(enc, txn);
enc.Add(0x05); // NULL
EncodeNumber(enc, (double)m_nBWCheckCounter++);
packet.m_nBodySize = (uint)enc.Count;
packet.m_body = enc.ToArray();
return SendPacket(packet, false);
}
bool SendConnect()
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Large;
packet.PacketType = PacketType.Invoke;
packet.AllocPacket(4096);
Logger.Log("Sending connect");
List<byte> enc = new List<byte>();
EncodeString(enc, "connect");
EncodeNumber(enc, ++m_numInvokes);
enc.Add(0x03); //Object Datatype
EncodeString(enc, "app", Link.app); Logger.Log(string.Format("app : {0}", Link.app));
if (String.IsNullOrEmpty(Link.flashVer))
EncodeString(enc, "flashVer", "WIN 10,0,32,18");
else
EncodeString(enc, "flashVer", Link.flashVer);
if (!string.IsNullOrEmpty(Link.swfUrl)) EncodeString(enc, "swfUrl", Link.swfUrl);
EncodeString(enc, "tcUrl", Link.tcUrl); Logger.Log(string.Format("tcUrl : {0}", Link.tcUrl));
EncodeBoolean(enc, "fpad", false);
EncodeNumber(enc, "capabilities", 15.0);
EncodeNumber(enc, "audioCodecs", 3191.0);
EncodeNumber(enc, "videoCodecs", 252.0);
EncodeNumber(enc, "videoFunction", 1.0);
if (!string.IsNullOrEmpty(Link.pageUrl)) EncodeString(enc, "pageUrl", Link.pageUrl);
//EncodeNumber(enc, "objectEncoding", 0.0);
enc.Add(0); enc.Add(0); enc.Add(0x09); // end of object - 0x00 0x00 0x09
// add auth string
if (!string.IsNullOrEmpty(Link.auth))
{
EncodeBoolean(enc, true);
EncodeString(enc, Link.auth);
}
// add aditional arbitrary AMF connection properties
if (Link.extras != null)
{
foreach (AMFObjectProperty aProp in Link.extras.m_properties) aProp.Encode(enc);
}
Array.Copy(enc.ToArray(), packet.m_body, enc.Count);
packet.m_nBodySize = (uint)enc.Count;
return SendPacket(packet);
}
bool SendBytesReceived()
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x02; // control channel (invoke)
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.BytesRead;
packet.AllocPacket(4);
packet.m_nBodySize = 4;
List<byte> enc = new List<byte>();
EncodeInt32(enc, bytesReadTotal);
packet.m_nBodySize = (uint)enc.Count;
packet.m_body = enc.ToArray();
lastSentBytesRead = bytesReadTotal;
Logger.Log(string.Format("Send bytes report. ({0} bytes)", bytesReadTotal));
return SendPacket(packet, false);
}
bool SendCheckBW()
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Large;
packet.PacketType = PacketType.Invoke;
//packet.m_nInfoField1 = System.Environment.TickCount;
Logger.Log("Sending _checkbw");
List<byte> enc = new List<byte>();
EncodeString(enc, "_checkbw");
EncodeNumber(enc, ++m_numInvokes);
enc.Add(0x05); // NULL
packet.m_nBodySize = (uint)enc.Count;
packet.m_body = enc.ToArray();
// triggers _onbwcheck and eventually results in _onbwdone
return SendPacket(packet, false);
}
bool ReadPacket(out RTMPPacket packet)
{
// Chunk Basic Header (1, 2 or 3 bytes)
// the two most significant bits hold the chunk type
// value in the 6 least significant bits gives the chunk stream id (0,1,2 are reserved): 0 -> 3 byte header | 1 -> 2 byte header | 2 -> low level protocol message | 3-63 -> stream id
byte[] singleByteToReadBuffer = new byte[1];
if (ReadN(singleByteToReadBuffer, 0, 1) != 1)
{
Logger.Log("failed to read RTMP packet header");
packet = null;
return false;
}
byte type = singleByteToReadBuffer[0];
byte headerType = (byte)((type & 0xc0) >> 6);
int channel = (byte)(type & 0x3f);
if (channel == 0)
{
if (ReadN(singleByteToReadBuffer, 0, 1) != 1)
{
Logger.Log("failed to read RTMP packet header 2nd byte");
packet = null;
return false;
}
channel = singleByteToReadBuffer[0];
channel += 64;
//header++;
}
else if (channel == 1)
{
int tmp;
byte[] hbuf = new byte[2];
if (ReadN(hbuf, 0, 2) != 2)
{
Logger.Log("failed to read RTMP packet header 3rd and 4th byte");
packet = null;
return false;
}
tmp = ((hbuf[2]) << 8) + hbuf[1];
channel = tmp + 64;
Logger.Log(string.Format("channel: {0}", channel));
//header += 2;
}
uint nSize = packetSize[headerType];
//Logger.Log(string.Format("reading RTMP packet chunk on channel {0}, headersz {1}", channel, nSize));
if (nSize < RTMP_LARGE_HEADER_SIZE)
packet = m_vecChannelsIn[channel]; // using values from the last message of this channel
else
packet = new RTMPPacket() { HeaderType = (HeaderType)headerType, m_nChannel = channel, m_hasAbsTimestamp = true }; // new packet
nSize--;
byte[] header = new byte[RTMP_LARGE_HEADER_SIZE];
if (nSize > 0 && ReadN(header, 0, (int)nSize) != nSize)
{
Logger.Log(string.Format("failed to read RTMP packet header. type: {0}", type));
return false;
}
if (nSize >= 3)
{
packet.m_nTimeStamp = (uint)ReadInt24(header, 0);
if (nSize >= 6)
{
packet.m_nBodySize = (uint)ReadInt24(header, 3);
//Logger.Log(string.Format("new packet body to read {0}", packet.m_nBodySize));
packet.m_nBytesRead = 0;
packet.Free(); // new packet body
if (nSize > 6)
{
if (Enum.IsDefined(typeof(PacketType), header[6])) packet.PacketType = (PacketType)header[6];
else Logger.Log(string.Format("Unknown packet type received: {0}", header[6]));
if (nSize == 11)
packet.m_nInfoField2 = ReadInt32LE(header, 7);
}
}
if (packet.m_nTimeStamp == 0xffffff)
{
byte[] extendedTimestampDate = new byte[4];
if (ReadN(extendedTimestampDate, 0, 4) != 4)
{
Logger.Log("failed to read extended timestamp");
return false;
}
packet.m_nTimeStamp = (uint)ReadInt32(extendedTimestampDate, 0);
}
}
if (packet.m_nBodySize >= 0 && packet.m_body == null && !packet.AllocPacket((int)packet.m_nBodySize))
{
//CLog::Log(LOGDEBUG,"%s, failed to allocate packet", __FUNCTION__);
return false;
}
uint nToRead = packet.m_nBodySize - packet.m_nBytesRead;
uint nChunk = (uint)InChunkSize;
if (nToRead < nChunk)
nChunk = nToRead;
int read = ReadN(packet.m_body, (int)packet.m_nBytesRead, (int)nChunk);
if (read != nChunk)
{
Logger.Log(string.Format("failed to read RTMP packet body. total:{0}/{1} chunk:{2}/{3}", packet.m_nBytesRead, packet.m_nBodySize, read, nChunk));
packet.m_body = null; // we dont want it deleted since its pointed to from the stored packets (m_vecChannelsIn)
return false;
}
packet.m_nBytesRead += nChunk;
// keep the packet as ref for other packets on this channel
m_vecChannelsIn[packet.m_nChannel] = packet.ShallowCopy();
if (packet.IsReady())
{
//Logger.Log(string.Format("packet with {0} bytes read", packet.m_nBytesRead));
// make packet's timestamp absolute
if (!packet.m_hasAbsTimestamp)
packet.m_nTimeStamp += m_channelTimestamp[packet.m_nChannel]; // timestamps seem to be always relative!!
m_channelTimestamp[packet.m_nChannel] = packet.m_nTimeStamp;
// reset the data from the stored packet. we keep the header since we may use it later if a new packet for this channel
// arrives and requests to re-use some info (small packet header)
m_vecChannelsIn[packet.m_nChannel].m_body = null;
m_vecChannelsIn[packet.m_nChannel].m_nBytesRead = 0;
m_vecChannelsIn[packet.m_nChannel].m_hasAbsTimestamp = false; // can only be false if we reuse header
}
return true;
}
void HandleServerBW(RTMPPacket packet)
{
m_nServerBW = ReadInt32(packet.m_body, 0);
Logger.Log(string.Format("HandleServerBW: server BW = {0}", m_nServerBW));
}
void HandlePing(RTMPPacket packet)
{
short nType = -1;
if (packet.m_body != null && packet.m_nBodySize >= 2)
nType = (short)ReadInt16(packet.m_body, 0);
Logger.Log(string.Format("received: ping, type: {0}", nType));
if (packet.m_nBodySize >= 6)
{
uint nTime = (uint)ReadInt32(packet.m_body, 2);
switch (nType)
{
case 0:
Logger.Log(string.Format("Stream Begin {0}", nTime));
break;
case 1:
Logger.Log(string.Format("Stream EOF {0}", nTime));
if (Pausing == 1) Pausing = 2;
break;
case 2:
Logger.Log(string.Format("Stream Dry {0}", nTime));
break;
case 4:
Logger.Log(string.Format("Stream IsRecorded {0}", nTime));
break;
case 6:
// server ping. reply with pong.
Logger.Log(string.Format("Ping {0}", nTime));
SendPing(0x07, nTime, 0);
break;
case 31:
Logger.Log(string.Format("Stream BufferEmpty {0}", nTime));
if (!Link.bLiveStream)
{
if (Pausing == 0)
{
SendPause(true);
Pausing = 1;
}
else if (Pausing == 2)
{
SendPause(false);
Pausing = 3;
}
}
break;
case 32:
Logger.Log(string.Format("Stream BufferReady {0}", nTime));
break;
default:
Logger.Log(string.Format("Stream xx {0}", nTime));
break;
}
}
if (nType == 0x1A)
{
if (packet.m_nBodySize > 2 && packet.m_body[2] > 0x01)
{
Logger.Log(string.Format("SWFVerification Type {0} request not supported! Patches welcome...", packet.m_body[2]));
}
else if (Link.SWFHash != null) // respond with HMAC SHA256 of decompressed SWF, key is the 30 byte player key, also the last 30 bytes of the server handshake are applied
{
SendPing(0x1B, 0, 0);
}
else
{
Logger.Log("Ignoring SWFVerification request, swfhash and swfsize parameters not set!");
}
}
}
bool SendServerBW()
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x02; // control channel (invoke)
packet.HeaderType = HeaderType.Large;
packet.PacketType = PacketType.ServerBW;
packet.AllocPacket(4);
packet.m_nBodySize = 4;
List<byte> bytesToSend = new List<byte>();
EncodeInt32(bytesToSend, m_nServerBW); // was hard coded : 0x001312d0
packet.m_body = bytesToSend.ToArray();
return SendPacket(packet, false);
}
bool SendDeleteStream()
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.Invoke;
Logger.Log("Sending deleteStream");
List<byte> enc = new List<byte>();
EncodeString(enc, "deleteStream");
EncodeNumber(enc, ++m_numInvokes);
enc.Add(0x05); // NULL
EncodeNumber(enc, m_stream_id);
packet.m_nBodySize = (uint)enc.Count;
packet.m_body = enc.ToArray();
/* no response expected */
return SendPacket(packet, false);
}
public int GetNextMediaPacket(out RTMPPacket packet)
{
int bHasMediaPacket = 0;
packet = null;
while (bHasMediaPacket == 0 && IsConnected() && ReadPacket(out packet))
{
if (!packet.IsReady()) continue; // keep reading until complete package has arrived
bHasMediaPacket = ClientPacket(packet);
if (bHasMediaPacket > 0 && Pausing == 3) Pausing = 0;
packet.m_nBytesRead = 0;
}
if (bHasMediaPacket > 0) Playing = true;
return bHasMediaPacket;
}
bool SendFCSubscribe(string subscribepath)
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.Invoke;
Logger.Log(string.Format("Sending FCSubscribe: {0}", subscribepath));
List<byte> enc = new List<byte>();
EncodeString(enc, "FCSubscribe");
EncodeNumber(enc, ++m_numInvokes);
enc.Add(0x05); // NULL
EncodeString(enc, subscribepath);
packet.m_nBodySize = (uint)enc.Count;
packet.m_body = enc.ToArray();
return SendPacket(packet);
}
public bool SendFlex(string name, double number)
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x03; // control channel (invoke)
packet.HeaderType = HeaderType.Large;
packet.PacketType = PacketType.Invoke_AMF3;
List<byte> enc = new List<byte>();
enc.Add(0x00);
EncodeString(enc, name);
EncodeNumber(enc, 0);
enc.Add(0x05); // NULL
EncodeNumber(enc, number);
packet.m_body = enc.ToArray();
packet.m_nBodySize = (uint)enc.Count;
Logger.Log(string.Format("Sending flex: ({0},{1})", name, number.ToString()));
return SendPacket(packet);
}
bool SendPacket(RTMPPacket packet, bool queue = true)
{
uint last = 0;
uint t = 0;
RTMPPacket prevPacket = m_vecChannelsOut[packet.m_nChannel];
if (packet.HeaderType != HeaderType.Large && prevPacket != null)
{
// compress a bit by using the prev packet's attributes
if (prevPacket.m_nBodySize == packet.m_nBodySize &&
prevPacket.PacketType == packet.PacketType &&
packet.HeaderType == HeaderType.Medium)
packet.HeaderType = HeaderType.Small;
if (prevPacket.m_nTimeStamp == packet.m_nTimeStamp &&
packet.HeaderType == HeaderType.Small)
packet.HeaderType = HeaderType.Minimum;
last = prevPacket.m_nTimeStamp;
}
uint nSize = packetSize[(byte)packet.HeaderType];
t = packet.m_nTimeStamp - last;
List<byte> header = new List<byte>();//byte[RTMP_LARGE_HEADER_SIZE];
byte c = (byte)(((byte)packet.HeaderType << 6) | packet.m_nChannel);
header.Add(c);
if (nSize > 1)
EncodeInt24(header, (int)t);
if (nSize > 4)
{
EncodeInt24(header, (int)packet.m_nBodySize);
header.Add((byte)packet.PacketType);
}
if (nSize > 8)
EncodeInt32LE(header, packet.m_nInfoField2);
uint hSize = nSize;
byte[] headerBuffer = header.ToArray();
nSize = packet.m_nBodySize;
byte[] buffer = packet.m_body;
uint bufferOffset = 0;
uint nChunkSize = (uint)outChunkSize;
while (nSize + hSize > 0)
{
if (nSize < nChunkSize) nChunkSize = nSize;
if (hSize > 0)
{
byte[] combinedBuffer = new byte[headerBuffer.Length + nChunkSize];
Array.Copy(headerBuffer, combinedBuffer, headerBuffer.Length);
Array.Copy(buffer, (int)bufferOffset, combinedBuffer, headerBuffer.Length, (int)nChunkSize);
WriteN(combinedBuffer, 0, combinedBuffer.Length);
hSize = 0;
}
else
{
WriteN(buffer, (int)bufferOffset, (int)nChunkSize);
}
nSize -= nChunkSize;
bufferOffset += nChunkSize;
if (nSize > 0)
{
byte sep = (byte)(0xc0 | c);
hSize = 1;
headerBuffer = new byte[1] { sep };
}
}
if (packet.PacketType == PacketType.Invoke && queue) // we invoked a remote method, keep it in call queue till result arrives
m_methodCalls.Enqueue(ReadString(packet.m_body, 1));
m_vecChannelsOut[packet.m_nChannel] = packet;
//m_vecChannelsOut[packet.m_nChannel].m_body = null;
return true;
}
/// <summary>
/// Reacts corresponding to the packet.
/// </summary>
/// <param name="packet"></param>
/// <returns>0 - no media packet, 1 - media packet, 2 - play complete</returns>
int ClientPacket(RTMPPacket packet)
{
int bHasMediaPacket = 0;
switch (packet.PacketType)
{
case PacketType.ChunkSize:
HandleChangeChunkSize(packet);
break;
case PacketType.BytesRead:
//CLog::Log(LOGDEBUG,"%s, received: bytes read report", __FUNCTION__);
break;
case PacketType.Control:
HandlePing(packet);
break;
case PacketType.ServerBW:
HandleServerBW(packet);
break;
case PacketType.ClientBW:
HandleClientBW(packet);
break;
case PacketType.Audio:
//CLog::Log(LOGDEBUG,"%s, received: audio %lu bytes", __FUNCTION__, packet.m_nBodySize);
//HandleAudio(packet);
if (m_mediaChannel == 0) m_mediaChannel = packet.m_nChannel;
if (Pausing == 0) m_mediaStamp = packet.m_nTimeStamp;
bHasMediaPacket = 1;
break;
case PacketType.Video:
//CLog::Log(LOGDEBUG,"%s, received: video %lu bytes", __FUNCTION__, packet.m_nBodySize);
//HandleVideo(packet);
if (m_mediaChannel == 0) m_mediaChannel = packet.m_nChannel;
if (Pausing == 0) m_mediaStamp = packet.m_nTimeStamp;
bHasMediaPacket = 1;
break;
case PacketType.Metadata:
//CLog::Log(LOGDEBUG,"%s, received: notify %lu bytes", __FUNCTION__, packet.m_nBodySize);
HandleMetadata(packet);
bHasMediaPacket = 1;
break;
case PacketType.Invoke:
//CLog::Log(LOGDEBUG,"%s, received: invoke %lu bytes", __FUNCTION__, packet.m_nBodySize);
if (HandleInvoke(packet) == true) bHasMediaPacket = 2;
break;
case PacketType.FlvTags:
//Logger.Log(string.Format("received: FLV tag(s) {0} bytes", packet.m_nBodySize));
HandleFlvTags(packet);
bHasMediaPacket = 1;
break;
default:
Logger.Log(string.Format("Ignoring packet of type {0}", packet.PacketType));
break;
}
return bHasMediaPacket;
}
bool SendPause(bool doPause)
{
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x08; // we make 8 our stream channel
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.Invoke;
List<byte> enc = new List<byte>();
EncodeString(enc, "pause");
EncodeNumber(enc, ++m_numInvokes);
enc.Add(0x05); // NULL
EncodeBoolean(enc, doPause);
EncodeNumber(enc, (double)m_channelTimestamp[m_mediaChannel]);
packet.m_body = enc.ToArray();
packet.m_nBodySize = (uint)enc.Count;
Logger.Log(string.Format("Sending pause: ({0}), Time = {1}", doPause.ToString(), m_channelTimestamp[m_mediaChannel]));
return SendPacket(packet);
}
void HandleClientBW(RTMPPacket packet)
{
m_nClientBW = ReadInt32(packet.m_body, 0);
if (packet.m_nBodySize > 4)
m_nClientBW2 = packet.m_body[4];
else
m_nClientBW2 = 0;
Logger.Log(string.Format("HandleClientBW: client BW = {0} {1}", m_nClientBW, m_nClientBW2));
}
/// <summary>
/// The type of Ping packet is 0x4 and contains two mandatory parameters and two optional parameters.
/// The first parameter is the type of Ping (short integer).
/// The second parameter is the target of the ping.
/// As Ping is always sent in Channel 2 (control channel) and the target object in RTMP header is always 0
/// which means the Connection object,
/// it's necessary to put an extra parameter to indicate the exact target object the Ping is sent to.
/// The second parameter takes this responsibility.
/// The value has the same meaning as the target object field in RTMP header.
/// (The second value could also be used as other purposes, like RTT Ping/Pong. It is used as the timestamp.)
/// The third and fourth parameters are optional and could be looked upon as the parameter of the Ping packet.
/// Below is an unexhausted list of Ping messages.
/// type 0: Clear the stream. No third and fourth parameters. The second parameter could be 0. After the connection is established, a Ping 0,0 will be sent from server to client. The message will also be sent to client on the start of Play and in response of a Seek or Pause/Resume request. This Ping tells client to re-calibrate the clock with the timestamp of the next packet server sends.
/// type 1: Tell the stream to clear the playing buffer.
/// type 3: Buffer time of the client. The third parameter is the buffer time in millisecond.
/// type 4: Reset a stream. Used together with type 0 in the case of VOD. Often sent before type 0.
/// type 6: Ping the client from server. The second parameter is the current time.
/// type 7: Pong reply from client. The second parameter is the time the server sent with his ping request.
/// type 26: SWFVerification request
/// type 27: SWFVerification response
/// type 31: Buffer empty
/// type 32: Buffer full
/// </summary>
/// <param name="nType"></param>
/// <param name="nObject"></param>
/// <param name="nTime"></param>
/// <returns></returns>
bool SendPing(short nType, uint nObject, uint nTime)
{
Logger.Log(string.Format("Sending ping type: {0}", nType));
RTMPPacket packet = new RTMPPacket();
packet.m_nChannel = 0x02; // control channel (ping)
packet.HeaderType = HeaderType.Medium;
packet.PacketType = PacketType.Control;
//packet.m_nInfoField1 = System.Environment.TickCount;
int nSize = (nType == 0x03 ? 10 : 6); // type 3 is the buffer time and requires all 3 parameters. all in all 10 bytes.
if (nType == 0x1B) nSize = 44;
packet.AllocPacket(nSize);
packet.m_nBodySize = (uint)nSize;
List<byte> buf = new List<byte>();
EncodeInt16(buf, nType);
if (nType == 0x1B)
{
buf.AddRange(Link.SWFVerificationResponse);
}
else
{
if (nSize > 2)
EncodeInt32(buf, (int)nObject);
if (nSize > 6)
EncodeInt32(buf, (int)nTime);
}
packet.m_body = buf.ToArray();
return SendPacket(packet, false);
}
/// <summary>
/// Analyzes and responds if required to the given <see cref="RTMPPacket"/>.
/// </summary>
/// <param name="packet">The <see cref="RTMPPacket"/> to inspect amnd react to.</param>
/// <returns>0 (false) for OK/Failed/error, 1 for 'Stop or Complete' (true)</returns>
bool HandleInvoke(RTMPPacket packet)
{
bool ret = false;
if (packet.m_body[0] != 0x02) // make sure it is a string method name we start with
{
Logger.Log("HandleInvoke: Sanity failed. no string method in invoke packet");
return false;
}
AMFObject obj = new AMFObject();
int nRes = obj.Decode(packet.m_body, 0, (int)packet.m_nBodySize, false);
if (nRes < 0)
{
Logger.Log("HandleInvoke: error decoding invoke packet");
return false;
}
obj.Dump();
string method = obj.GetProperty(0).GetString();
double txn = obj.GetProperty(1).GetNumber();
Logger.Log(string.Format("server invoking <{0}>", method));
if (method == "_result")
{
string methodInvoked = m_methodCalls.Dequeue();
Logger.Log(string.Format("received result for method call <{0}>", methodInvoked));
if (methodInvoked == "connect")
{
if (!string.IsNullOrEmpty(Link.token))
{
List<AMFObjectProperty> props = new List<AMFObjectProperty>();
obj.FindMatchingProperty("secureToken", props, int.MaxValue);
if (props.Count > 0)
{
string decodedToken = Tea.Decrypt(props[0].GetString(), Link.token);
SendSecureTokenResponse(decodedToken);
}
}
SendServerBW();
if (!SkipCreateStream)
{
SendPing(3, 0, 300);
SendCreateStream();
}
if (!string.IsNullOrEmpty(Link.subscribepath)) SendFCSubscribe(Link.subscribepath);
else if (Link.bLiveStream) SendFCSubscribe(Link.playpath);
}
else if (methodInvoked == "createStream")
{
m_stream_id = (int)obj.GetProperty(3).GetNumber();
SendPlay();
SendPing(3, (uint)m_stream_id, (uint)m_nBufferMS);
}
else if (methodInvoked == "play")
{
Playing = true;
}
}
else if (method == "onBWDone")
{
if (m_nBWCheckCounter == 0) SendCheckBW();
}
else if (method == "_onbwcheck")
{
SendCheckBWResult(txn);
}
else if (method == "_onbwdone")
{
if (m_methodCalls.Contains("_checkbw"))
{
string[] queue = m_methodCalls.ToArray();
m_methodCalls.Clear();
for (int i = 0; i < queue.Length; i++) if (queue[i] != "_checkbw") m_methodCalls.Enqueue(queue[i]);
}
}
else if (method == "_error")
{
Logger.Log("rtmp server sent error");
}
else if (method == "close")
{
Logger.Log("rtmp server requested close");
Close();
}
else if (method == "onStatus")
{
string code = obj.GetProperty(3).GetObject().GetProperty("code").GetString();
string level = obj.GetProperty(3).GetObject().GetProperty("level").GetString();
Logger.Log(string.Format("onStatus: code :{0}, level: {1}", code, level));
if (code == "NetStream.Failed" || code == "NetStream.Play.Failed" || code == "NetStream.Play.StreamNotFound" || code == "NetConnection.Connect.InvalidApp")
{
Close();
}
else if (code == "NetStream.Play.Start" || code == "NetStream.Publish.Start")
{
Playing = true;
}
else if (code == "NetStream.Play.Complete" || code == "NetStream.Play.Stop")
{
Close();
ret = true;
}
else if (code == "NetStream.Pause.Notify")
{
if (Pausing == 1 || Pausing == 2)
{
SendPause(false);
Pausing = 3;
}
}
}
else if (MethodHookHandler != null)
{
ret = MethodHookHandler(method, obj, this);
}
else
{
}
return ret;
}
bool WriteStream(RTMPPacket packet, Stream stream, out uint nTimeStamp)
{
nTimeStamp = 0;
uint prevTagSize = 0;
// skip video info/command packets
if (packet.PacketType == PacketType.Video && packet.m_nBodySize == 2 && ((packet.m_body[0] & 0xf0) == 0x50))
{
return true;
}
if (packet.PacketType == PacketType.Video && packet.m_nBodySize <= 5)
{
Logger.Log(string.Format("ignoring too small video packet: size: {0}", packet.m_nBodySize));
return true;
}
if (packet.PacketType == PacketType.Audio && packet.m_nBodySize <= 1)
{
Logger.Log(string.Format("ignoring too small audio packet: size: {0}", packet.m_nBodySize));
return true;
}
// audio (0x08), video (0x09) or metadata (0x12) packets :
// construct 11 byte header then add rtmp packet's data
if (packet.PacketType == PacketType.Audio || packet.PacketType == PacketType.Video || packet.PacketType == PacketType.Metadata)
{
nTimeStamp = (uint)packet.m_nTimeStamp;
prevTagSize = 11 + packet.m_nBodySize;
stream.WriteByte((byte)packet.PacketType);
List<byte> somebytes = new List<byte>();
RTMP.EncodeInt24(somebytes, (int)packet.m_nBodySize);
RTMP.EncodeInt24(somebytes, (int)nTimeStamp);
stream.Write(somebytes.ToArray(), 0, somebytes.Count);
somebytes.Clear();
stream.WriteByte((byte)(((nTimeStamp) & 0xFF000000) >> 24));
// stream id
RTMP.EncodeInt24(somebytes, 0);
stream.Write(somebytes.ToArray(), 0, somebytes.Count);
somebytes.Clear();
// body
stream.Write(packet.m_body, 0, (int)packet.m_nBodySize);
// prevTagSize
RTMP.EncodeInt32(somebytes, (int)prevTagSize);
stream.Write(somebytes.ToArray(), 0, somebytes.Count);
somebytes.Clear();
}
// correct tagSize and obtain timestamp if we have an FLV stream
else if (packet.PacketType == PacketType.FlvTags)
{
List<byte> data = packet.m_body.ToList();
uint pos = 0;
/* grab first timestamp and see if it needs fixing */
nTimeStamp = (uint)RTMP.ReadInt24(packet.m_body, 4);
nTimeStamp |= (uint)(packet.m_body[7] << 24);
var delta = packet.m_nTimeStamp - nTimeStamp;
while (pos + 11 < packet.m_nBodySize)
{
uint dataSize = (uint)RTMP.ReadInt24(packet.m_body, (int)pos + 1); // size without header (11) and without prevTagSize (4)
nTimeStamp = (uint)RTMP.ReadInt24(packet.m_body, (int)pos + 4);
nTimeStamp |= (uint)(packet.m_body[pos + 7] << 24);
if (delta != 0)
{
nTimeStamp += delta;
List<byte> newTimeStampData = new List<byte>();
RTMP.EncodeInt24(newTimeStampData, (int)nTimeStamp);
data[(int)pos + 4] = newTimeStampData[0];
data[(int)pos + 5] = newTimeStampData[1];
data[(int)pos + 6] = newTimeStampData[2];
data[(int)pos + 7] = (byte)(nTimeStamp >> 24);
}
if (pos + 11 + dataSize + 4 > packet.m_nBodySize)
{
if (pos + 11 + dataSize > packet.m_nBodySize)
{
Logger.Log(string.Format("Wrong data size ({0}), stream corrupted, aborting!", dataSize));
return false;
}
// we have to append a last tagSize!
prevTagSize = dataSize + 11;
RTMP.EncodeInt32(data, (int)prevTagSize);
}
else
{
prevTagSize = (uint)RTMP.ReadInt32(packet.m_body, (int)(pos + 11 + dataSize));
if (prevTagSize != (dataSize + 11))
{
//Tag and data size are inconsistent, writing tag size according to dataSize+11
prevTagSize = dataSize + 11;
RTMP.EncodeInt32(data, (int)prevTagSize, pos + 11 + dataSize);
}
}
pos += prevTagSize + 4;//(11+dataSize+4);
}
stream.Write(data.ToArray(), 0, data.Count);
}
return true;
}
