public virtual int CompleteFrom(System.Net.Sockets.Socket socket, MemorySegment buffer)
{
if (IsReadOnly)
{
throw new InvalidOperationException("Cannot modify a RtcpPacket when IsReadOnly is false.");
}
//If the packet is complete then return
if (IsDisposed || IsComplete)
{
return(0);
}
//Needs to account for buffer or socket.
//Calulcate the amount of octets remaining in the RtcpPacket including the header
int octetsRemaining = ((ushort)(Header.LengthInWordsMinusOne + 1)) * 4 - Length, offset = Payload != null ? Payload.Count : 0;
if (octetsRemaining > 0)
{
//There is not enough room in the array to finish the packet
if (Payload.Count < octetsRemaining)
{
//Allocte the memory for the required data
if (m_OwnedOctets == null)
{
m_OwnedOctets = new byte[octetsRemaining];
}
else
{
m_OwnedOctets = m_OwnedOctets.Concat(new byte[octetsRemaining]).ToArray();
}
}
System.Net.Sockets.SocketError error;
int recieved = 0;
//Read from the stream, decrementing from octetsRemaining what was read.
while (octetsRemaining > 0)
{
int rec = SocketExtensions.AlignedReceive(m_OwnedOctets, offset, octetsRemaining, socket, out error);
offset += rec;
octetsRemaining -= rec;
recieved += rec;
}
//Re-allocate the segment around the received data. //length + received
Payload = new MemorySegment(m_OwnedOctets, 0, m_OwnedOctets.Length);
return(recieved);
}
return(0);
}
public virtual int CompleteFrom(System.Net.Sockets.Socket socket, MemorySegment buffer)
{
if (IsReadOnly)
{
throw new InvalidOperationException("Cannot modify a RtpPacket when IsReadOnly is false.");
}
//If the packet is complete then return
if (IsDisposed || IsComplete)
{
return(0);
}
// Cache the size of the original payload
int payloadCount = Payload.Count,
octetsRemaining = payloadCount, //Cache how many octets remain in the payload
offset = Payload.Offset, //Cache the offset in parsing
sourceListOctets = ContributingSourceListOctets, //Cache the amount of octets required in the ContributingSourceList.
extensionSize = Header.Extension ? RtpExtension.MinimumSize : 0, //Cache the amount of octets required to read the ExtensionHeader
recieved = 0;
//If the ContributingSourceList is not complete
if (payloadCount < sourceListOctets)
{
//Calulcate the amount of octets to receive, ABS is weird and not required since paycount is checked to be less
octetsRemaining = sourceListOctets - payloadCount; //Binary.Abs(payloadCount - sourceListOctets);
//octetsRemaining = Binary.Min(payloadCount, sourceListOctets);
//Allocte the memory for the required data
if (m_OwnedOctets == null)
{
m_OwnedOctets = new byte[octetsRemaining];
}
else
{
m_OwnedOctets = m_OwnedOctets.Concat(new byte[octetsRemaining]).ToArray();
}
System.Net.Sockets.SocketError error;
//Read from the stream, decrementing from octetsRemaining what was read.
while (octetsRemaining > 0)
{
//Receive octetsRemaining or less
int justReceived = SocketExtensions.AlignedReceive(m_OwnedOctets, offset, octetsRemaining, socket, out error);
//Move the offset
offset += justReceived;
//Decrement how many octets were receieved
octetsRemaining -= justReceived;
recieved += justReceived;
}
}
//At the end of the sourceList
offset = sourceListOctets;
//ContribuingSourceList is now Complete
//If there is a RtpExtension indicated by the RtpHeader
if (Header.Extension)
{
//Determine if the extension header was read
octetsRemaining = RtpExtension.MinimumSize - (payloadCount - offset);
//If the extension header is not yet read
if (octetsRemaining > 0)
{
//Allocte the memory for the extension header
if (m_OwnedOctets == null)
{
m_OwnedOctets = new byte[octetsRemaining];
}
else
{
m_OwnedOctets = m_OwnedOctets.Concat(new byte[octetsRemaining]).ToArray();
}
System.Net.Sockets.SocketError error;
//Read from the socket, decrementing from octetsRemaining what was read.
while (octetsRemaining > 0)
{
//Receive octetsRemaining or less
int justReceived = SocketExtensions.AlignedReceive(m_OwnedOctets, offset, octetsRemaining, socket, out error);
//Move the offset
offset += justReceived;
//Decrement how many octets were receieved
octetsRemaining -= justReceived;
recieved += justReceived;
}
}
//at least 4 octets are now present in Payload @ Payload.Offset
//Use a RtpExtension instance to read the Extension Header and data.
using (RtpExtension extension = GetExtension())
{
if (extension != null && false == extension.IsComplete)
{
//Cache the size of the RtpExtension (not including the Flags and LengthInWords [The Extension Header])
extensionSize = extension.Size - RtpExtension.MinimumSize;
//The amount of octets required for for completion are indicated by the Size property of the RtpExtension.
//Calulcate the amount of octets to receive
octetsRemaining = (payloadCount - offset) - RtpExtension.MinimumSize;
if (octetsRemaining > 0 && octetsRemaining < extensionSize)
{
//Allocte the memory for the required data
if (m_OwnedOctets == null)
{
m_OwnedOctets = new byte[octetsRemaining];
}
else
{
m_OwnedOctets = m_OwnedOctets.Concat(new byte[octetsRemaining]).ToArray();
}
System.Net.Sockets.SocketError error;
//Read from the stream, decrementing from octetsRemaining what was read.
while (octetsRemaining > 0)
{
//Receive octetsRemaining or less
int justReceived = SocketExtensions.AlignedReceive(m_OwnedOctets, offset, octetsRemaining, socket, out error);
//Move the offset
offset += justReceived;
//Decrement how many octets were receieved
octetsRemaining -= justReceived;
recieved += justReceived;
}
}
}
}
}
//RtpExtension is now Complete
//If the header indicates the payload has padding
if (Header.Padding)
{
//Double check this math
octetsRemaining = PaddingOctets - payloadCount;
if (octetsRemaining > 0)
{
//Allocte the memory for the required data
if (m_OwnedOctets == null)
{
m_OwnedOctets = new byte[octetsRemaining];
}
else
{
m_OwnedOctets = m_OwnedOctets.Concat(new byte[octetsRemaining]).ToArray();
}
offset = payloadCount;
//If the amount of bytes read in the padding is NOT equal to the last byte in the segment the RtpPacket is NOT complete
while (octetsRemaining > 0)
{
System.Net.Sockets.SocketError error;
//Receive 1 byte
//Receive octetsRemaining or less
int justReceived = SocketExtensions.AlignedReceive(m_OwnedOctets, offset, octetsRemaining, socket, out error);
//Move the offset
offset += justReceived;
recieved += justReceived;
octetsRemaining -= justReceived;
}
}
}
//Padding is now complete
//Re allocate the payload segment to include any completed data
Payload = new MemorySegment(m_OwnedOctets, Payload.Offset, m_OwnedOctets.Length);
//RtpPacket is complete
return(recieved);
}
