/// <summary>
/// This method is called to update the local data from another SdesData
/// </summary>
/// <param name="data">what we want to update our data to</param>
/// <returns>true if the local data was updated, otherwise false</returns>
internal bool UpdateData(SdesData sdes)
{
bool ret = false;
// Well-known properties
// CName can never be updated, so start with Name
for (int id = (int)Rtcp.SDESType.NAME; id <= (int)Rtcp.SDESType.NOTE; id++)
{
if (!BufferChunk.Compare(data[id], sdes.data[id]))
{
data[id] = BufferChunk.Copy(sdes.data[id]);
ret = true;
}
}
// Write private properties
foreach (DictionaryEntry de in sdes.privs)
{
byte[] key = (byte[])de.Key;
byte[] data = (byte[])de.Value;
if (!privs.Contains(key) || !BufferChunk.Compare(data, privs[key]))
{
privs[BufferChunk.Copy(key)] = BufferChunk.Copy(data);
ret = true;
}
}
return(ret);
}
internal static RtpStream CreateStream(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes)
{
string sPT = sdes.GetPrivateExtension(Rtcp.PEP_PAYLOADTYPE);
PayloadType pt = (PayloadType)Enum.Parse(typeof(PayloadType), sPT);
// RtpStreamFec
string fecData = sdes.GetPrivateExtension(Rtcp.PEP_FEC);
if(fecData != null)
{
string[] args = fecData.Split(new char[]{':'});
ushort dataPxExp = ushort.Parse(args[0]);
ushort fecPxExp = ushort.Parse(args[1]);
if(fecPxExp == 0)
{
throw new ArgumentOutOfRangeException("fecPxExp", fecPxExp, "Must be >= 1");
}
// Frame based Fec
if(dataPxExp == 0)
{
return new RtpStreamFFec(rtpListener, ssrc, ipaddress, sdes, pt, fecPxExp);
}
else // Constant Fec
{
return new RtpStreamCFec(rtpListener, ssrc, ipaddress, sdes, pt, dataPxExp, fecPxExp);
}
}
// RtpStream
return new RtpStream(rtpListener, ssrc, ipaddress,sdes, pt);
}
internal static RtpStream CreateStream2(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes)
{
string sPT = sdes.GetPrivateExtension(Rtcp.PEP_PAYLOADTYPE);
PayloadType pt = PayloadType.JPEG;
// RtpStream
return new RtpStream(rtpListener, ssrc, ipaddress, sdes, pt);
}
/// <summary>
/// Raises the ParticipantStatusChanged event if the data changed
/// </summary>
/// <param name="data"></param>
internal new void UpdateData(SdesData data)
{
if (base.UpdateData(data))
{
object[] args = { this, new RtpEvents.RtpParticipantEventArgs(this) };
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseRtpParticipantDataChangedEvent), args);
}
}
internal RtpStreamCFec(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt, ushort dataPxExp, ushort fecPxExp)
: base(rtpListener, ssrc, ipaddress, sdes, pt)
{
pcFecType = 1;
this.dataPxExp = dataPxExp;
this.fecPxExp = fecPxExp;
SetDecoder();
InitializeDCRStorage();
}
internal RtpStream(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt)
{
Debug.Assert(rtpListener != null);
Debug.Assert(ssrc != 0);
Debug.Assert(sdes != null);
Debug.Assert(ipaddress != null);
this.returnBufferHandler = rtpListener.ReturnBufferCallback;
this.ssrc = ssrc;
this.pt = pt;
this.ipaddress = ipaddress;
properties = new SdesData(sdes);
InitializePerformanceCounters();
}
internal RtpSender(IRtpSession rtpSession, string name, PayloadType payloadType, Hashtable priExns, Hashtable paraPay)
{
if (Thread.CurrentThread.Name == null)
{
Thread.CurrentThread.Name = "RtpSender - " + name;
}
this.rtpSession = rtpSession;
this.payloadType = payloadType;
this.payloadPara = paraPay;
// Leave everything but CName and Name blank in order to reduce Rtcp bandwidth
sdes = new SdesData(rtpSession.Sdes.CName, name);
// Add private extensions
sdes.SetPrivateExtension(Rtcp.PEP_SOURCE, Rtcp.PED_STREAM);
sdes.SetPrivateExtension(Rtcp.PEP_PAYLOADTYPE, ((int)payloadType).ToString());
InitializeNetwork();
InitializeFrame();
InitializePerformanceCounters();
// This needs to be called after InitializeNetwork
if (priExns != null)
{
foreach (DictionaryEntry de in priExns)
{
sdes.SetPrivateExtension((string)de.Key, (string)de.Value);
}
string dbpString = (string)priExns[Rtcp.PEP_DBP];
if (dbpString != null)
{
DelayBetweenPackets = short.Parse(dbpString);
}
}
ResetState();
}
/// <summary>
/// Constructs an SdesData instance by reading its properties from another instance
/// </summary>
/// <param name="data"></param>
public SdesData(SdesData sdes)
{
// Skip the first index - see comments for member variable 'data'
for (int i = 1; i < sdes.data.Length; i++)
{
byte[] data = sdes.data[i];
if (data != null)
{
byte[] copy = new byte[data.Length];
data.CopyTo(copy, 0);
data = copy;
}
this.data[i] = data;
}
foreach (DictionaryEntry de in sdes.privs)
{
SetPrivateExtension((byte[])de.Key, (byte[])de.Value);
}
}
internal RtpStreamFec(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt)
: base(rtpListener, ssrc, ipaddress, sdes, pt)
{
this.getBufferHandler = rtpListener.GetBufferCallback;
}
private void ReadReportFromBuffer(BufferChunk buffer)
{
uint ssrc = buffer.NextUInt32();
SdesData props = new SdesData(buffer);
AddReport(new SdesReport(ssrc, props));
}
internal SdesReport(uint ssrc, SdesData sdes)
{
this.ssrc = ssrc;
this.sdes = sdes;
}
internal static RtpStream CreateStream2(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes)
{
string sPT = sdes.GetPrivateExtension(Rtcp.PEP_PAYLOADTYPE);
PayloadType pt = PayloadType.JPEG;
// RtpStream
return(new RtpStream(rtpListener, ssrc, ipaddress, sdes, pt));
}
/// <summary>
/// Constructs an SdesData instance by reading its properties from another instance
/// </summary>
/// <param name="data"></param>
public SdesData(SdesData sdes)
{
// Skip the first index - see comments for member variable 'data'
for(int i = 1; i < sdes.data.Length; i++)
{
byte[] data = sdes.data[i];
if(data != null)
{
byte[] copy = new byte[data.Length];
data.CopyTo(copy, 0);
data = copy;
}
this.data[i] = data;
}
foreach(DictionaryEntry de in sdes.privs)
{
SetPrivateExtension((byte[])de.Key, (byte[])de.Value);
}
}
internal SdesReport(uint ssrc, SdesData sdes)
{
this.ssrc = ssrc;
this.sdes = sdes;
}
/// <summary>
/// AddOrUpdateParticipant is called by the RtpSession ctor for adding the local participant and
/// by ProcessSdesPacket when an SDES packet arrives on the RtcpListener thread
///
/// If the participant does not exist in the session, we add them
/// If the participant does exist in the session, we make sure there is no CName conflict
/// </summary>
/// <param name="ssrc">Unique identifier of the stream</param>
/// <param name="sdes">CName, Name, Email, etc from which to create the Participant</param>
/// <param name="ip">Originating IP address of the ssrc and SdesData</param>
private void AddOrUpdateParticipant(uint ssrc, SdesData sdes, IPAddress ip)
{
lock(participants)
{
string cName = sdes.CName;
RtpParticipant participant = participants[cName];
// Participant does not exist
if(participant == null)
{
// Create a new participant
AddParticipant(ssrc, new RtpParticipant(sdes, ip));
}
else // Participant exists
{
CheckForCNameConflict(cName, new IPAddress[]{participant.IPAddress, ip});
participant.Stale = 0;
participant.UpdateData(sdes);
}
}
}
/// <summary>
/// Raises the ParticipantStatusChanged event if the data changed
/// </summary>
/// <param name="data"></param>
internal new void UpdateData(SdesData data)
{
if(base.UpdateData(data))
{
object[] args = {this, new RtpEvents.RtpParticipantEventArgs(this)};
EventThrower.QueueUserWorkItem(new RtpEvents.RaiseEvent(RtpEvents.RaiseRtpParticipantDataChangedEvent), args);
}
}
/// <summary>
/// Called to create a stream via Rtcp and have all the "links" created
///
/// CXP always stores the Participant ssrc/SdesData first in the SdesPacket. So a
/// participant should always exist before the stream is created in this code.
///
/// AddStream is called by the RtcpListener thread via ProcessSdesPacket
/// </summary>
private void AddOrUpdateStream(uint ssrc, string ipaddress, SdesData sdes)
{
lock(participants)
{
lock(streamsAndIPs)
{
RtpParticipant participant = participants[sdes.CName];
if(participants[sdes.CName] == null)
{
Debug.Assert(false);
throw new InvalidOperationException("Can't create a stream if there is " +
"no participant to associate it with!");
}
IPStreamPairHashtable.IPStreamPair ipsp = streamsAndIPs[ssrc];
Debug.Assert(ipsp != null);
if(ipsp.stream == null)
{
ipsp.stream = RtpStream.CreateStream(rtpListener, ssrc, ipaddress, sdes);
ssrcToParticipant[ssrc] = participant;
participant.AddSSRC(ssrc);
RaiseRtpStreamAddedEvent(ipsp.stream);
}
else // Update
{
ipsp.stream.Stale = 0;
ipsp.stream.Properties.UpdateData(sdes);
}
}
}
}
/// <summary>
/// Called to create a stream via Rtcp and have all the "links" created
///
/// CXP always stores the Participant ssrc/SdesData first in the SdesPacket. So a
/// participant should always exist before the stream is created in this code.
///
/// AddStream is called by the RtcpListener thread via ProcessSdesPacket
/// </summary>
private void AddOrUpdateStream2(uint ssrc, string ipaddress, SdesData sdes)
{
lock (participants)
{
lock (streamsAndIPs)
{
IPStreamPairHashtable.IPStreamPair ipsp = streamsAndIPs[ssrc];
Debug.Assert(ipsp != null);
if (ipsp.stream == null)
{
ipsp.stream = RtpStream.CreateStream2(rtpListener, ssrc, ipaddress, sdes);
RaiseRtpStreamAddedEvent(ipsp.stream);
}
else // Update
{
ipsp.stream.Stale = 0;
ipsp.stream.Properties.UpdateData(sdes);
}
}
}
}
void RtpSender.IRtpSession.AddSdes(uint ssrc, SdesData sdes)
{
AddSdes(ssrc, sdes);
}
private void AddSdes(uint ssrc, SdesData sdes)
{
cpb.Add_SDESReport(ssrc, sdes);
}
public void Add_SDESReport(uint ssrc, SdesData sdes)
{
sdesReports.Push(new SdesReport(ssrc, sdes));
}
internal RtpStreamFec(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt)
: base(rtpListener, ssrc, ipaddress, sdes, pt)
{
this.getBufferHandler = rtpListener.GetBufferCallback;
}
/// <summary>
/// Called when an SdesPacket arrives with an ID (CNAME) that no other session Participant has
/// </summary>
/// <param name="rtcp">SdesData containing the information for the participant</param>
/// <param name="ipAddress">IpAddress this participant originates from</param>
internal RtpParticipant(SdesData data, IPAddress ipAddress) : base(data)
{
this.ipAddress = ipAddress;
SetPrivateExtension(Rtcp.PEP_SOURCE, Rtcp.PED_PARTICIPANT);
}
public void Add(uint ssrc, SdesData props)
{
Dictionary.Add(ssrc, props);
}
internal RtpStreamFFec(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt, ushort fecPxExp)
: base(rtpListener, ssrc, ipaddress, sdes, pt)
{
fecPercent = fecPxExp;
pcFecType = 2;
}
/// <summary>
/// This method is called to update the local data from another SdesData
/// </summary>
/// <param name="data">what we want to update our data to</param>
/// <returns>true if the local data was updated, otherwise false</returns>
internal bool UpdateData(SdesData sdes)
{
bool ret = false;
// Well-known properties
// CName can never be updated, so start with Name
for(int id = (int)Rtcp.SDESType.NAME; id <= (int)Rtcp.SDESType.NOTE; id++)
{
if(!BufferChunk.Compare(data[id], sdes.data[id]))
{
data[id] = BufferChunk.Copy(sdes.data[id]);
ret = true;
}
}
// Write private properties
foreach(DictionaryEntry de in sdes.privs)
{
byte[] key = (byte[])de.Key;
byte[] data = (byte[])de.Value;
if(!privs.Contains(key) || !BufferChunk.Compare(data, privs[key]))
{
privs[BufferChunk.Copy(key)] = BufferChunk.Copy(data);
ret = true;
}
}
return ret;
}
internal RtpStreamCFec(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt, ushort dataPxExp, ushort fecPxExp)
: base(rtpListener, ssrc, ipaddress, sdes, pt)
{
pcFecType = 1;
this.dataPxExp = dataPxExp;
this.fecPxExp = fecPxExp;
SetDecoder();
InitializeDCRStorage();
}
public void Add(uint ssrc, SdesData props)
{
Dictionary.Add(ssrc, props);
}
internal RtpStreamFFec(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt, ushort fecPxExp)
: base(rtpListener, ssrc, ipaddress, sdes, pt)
{
fecPercent = fecPxExp;
pcFecType = 2;
}
/// <summary>
/// Called when an SdesPacket arrives with an ID (CNAME) that no other session Participant has
/// </summary>
/// <param name="rtcp">SdesData containing the information for the participant</param>
/// <param name="ipAddress">IpAddress this participant originates from</param>
internal RtpParticipant(SdesData data, IPAddress ipAddress) : base(data)
{
this.ipAddress = ipAddress;
SetPrivateExtension(Rtcp.PEP_SOURCE, Rtcp.PED_PARTICIPANT);
}
/// <summary>
/// Construct an SDES packet from existing properties
/// </summary>
public SdesPacket(uint ssrc, SdesData props) : base(Rtcp.PacketType.SDES)
{
AddReport(new SdesReport(ssrc, props));
}
internal static RtpStream CreateStream(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes)
{
string sPT = sdes.GetPrivateExtension(Rtcp.PEP_PAYLOADTYPE);
PayloadType pt = (PayloadType)Enum.Parse(typeof(PayloadType), sPT);
// RtpStreamFec
string fecData = sdes.GetPrivateExtension(Rtcp.PEP_FEC);
if (fecData != null)
{
string[] args = fecData.Split(new char[] { ':' });
ushort dataPxExp = ushort.Parse(args[0]);
ushort fecPxExp = ushort.Parse(args[1]);
if (fecPxExp == 0)
{
throw new ArgumentOutOfRangeException("fecPxExp", fecPxExp, "Must be >= 1");
}
// Frame based Fec
if (dataPxExp == 0)
{
return(new RtpStreamFFec(rtpListener, ssrc, ipaddress, sdes, pt, fecPxExp));
}
else // Constant Fec
{
return(new RtpStreamCFec(rtpListener, ssrc, ipaddress, sdes, pt, dataPxExp, fecPxExp));
}
}
// RtpStream
return(new RtpStream(rtpListener, ssrc, ipaddress, sdes, pt));
}
internal RtpStream(RtpListener rtpListener, uint ssrc, string ipaddress, SdesData sdes, PayloadType pt)
{
Debug.Assert(rtpListener != null);
Debug.Assert(ssrc != 0);
Debug.Assert(sdes != null);
Debug.Assert(ipaddress != null);
this.returnBufferHandler = rtpListener.ReturnBufferCallback;
this.ssrc = ssrc;
this.pt = pt;
this.ipaddress = ipaddress;
properties = new SdesData(sdes);
InitializePerformanceCounters();
}
internal RtpSender(IRtpSession rtpSession, string name, PayloadType payloadType, Hashtable priExns, Hashtable paraPay)
{
if(Thread.CurrentThread.Name == null)
{
Thread.CurrentThread.Name = "RtpSender - " + name;
}
this.rtpSession = rtpSession;
this.payloadType = payloadType;
this.payloadPara = paraPay;
// Leave everything but CName and Name blank in order to reduce Rtcp bandwidth
sdes = new SdesData(rtpSession.Sdes.CName, name);
// Add private extensions
sdes.SetPrivateExtension(Rtcp.PEP_SOURCE, Rtcp.PED_STREAM);
sdes.SetPrivateExtension(Rtcp.PEP_PAYLOADTYPE, ((int)payloadType).ToString());
InitializeNetwork();
InitializeFrame();
InitializePerformanceCounters();
// This needs to be called after InitializeNetwork
if( priExns != null )
{
foreach(DictionaryEntry de in priExns)
{
sdes.SetPrivateExtension((string)de.Key, (string)de.Value);
}
string dbpString = (string)priExns[Rtcp.PEP_DBP];
if( dbpString != null )
DelayBetweenPackets = short.Parse(dbpString);
}
ResetState();
}
/// <summary>
/// Write a report (ssrc + SdesData) to the buffer
/// </summary>
/// <param name="ssrc">uint was cast to int because that's how BufferChunk writes 32 bits</param>
/// <param name="props"></param>
private void WriteReportToBuffer(BufferChunk buffer, uint ssrc, SdesData props)
{
buffer += ssrc;
props.WriteDataToBuffer(buffer);
}