public void WriteToBuffer(byte[] buffer, int startIndex)
{
BufferConverter.WriteBytes(NtpTimestamp, buffer, startIndex, true);
BufferConverter.WriteBytes(RtpTimestamp, buffer, startIndex + 8, true);
BufferConverter.WriteBytes(PacketCount, buffer, startIndex + 12, true);
BufferConverter.WriteBytes(OctetCount, buffer, startIndex + 16, true);
return;
}
public void WriteToBuffer(byte[] buffer, int startIndex)
{
BufferConverter.WriteBytes(Src, buffer, startIndex, true);
int offset = startIndex + 4;
foreach (var item in ItemsToWrite)
{
if (item == SdesItemType.PrivateExtensions)
{
foreach (var pvtExt in PrivateExtensionsToWrite)
{
byte[] prefix = utf8Encoder.GetBytes(pvtExt);
byte[] value = PrivateExtensions[pvtExt];
buffer[offset] = (byte)SdesItemType.PrivateExtensions;
buffer[offset + 1] = (byte)(value.Length + prefix.Length + 1);
buffer[offset + 2] = (byte)(prefix.Length);
Buffer.BlockCopy(prefix, 0, buffer, offset + 3, prefix.Length);
Buffer.BlockCopy(value, 0, buffer, offset + 3 + prefix.Length, value.Length);
offset += 3 + prefix.Length + value.Length;
}
}
else
{
buffer[offset] = (byte)item;
byte[] value = null;
switch (item)
{
case SdesItemType.CName: value = cName; break;
case SdesItemType.Name: value = name; break;
case SdesItemType.Email: value = email; break;
case SdesItemType.Phone: value = phone; break;
case SdesItemType.Loc: value = loc; break;
case SdesItemType.Tool: value = tool; break;
case SdesItemType.Note: value = note; break;
}
if (value == null)
{
throw new Exception("SDES data has no value for " + item.ToString() + ". Provide a value or remove it from " + nameof(ItemsToWrite) + ".");
}
Buffer.BlockCopy(value, 0, buffer, offset + 2, value.Length);
}
}
}
public void ReadFromBuffer(byte[] buffer, int startIndex)
{
Src = BufferConverter.ToUInt32(buffer, startIndex, true);
int offset = startIndex + 4;
while (offset < buffer.Length)
{
byte[] value = new byte[buffer[offset + 1]];
Buffer.BlockCopy(buffer, offset + 2, value, 0, value.Length);
switch ((SdesItemType)buffer[offset])
{
case SdesItemType.CName: cName = value; break;
case SdesItemType.Name: name = value; break;
case SdesItemType.Email: email = value; break;
case SdesItemType.Phone: phone = value; break;
case SdesItemType.Loc: loc = value; break;
case SdesItemType.Tool: tool = value; break;
case SdesItemType.Note: note = value; break;
case SdesItemType.PrivateExtensions:
byte prefixLength = value[0];
string extPrefix = utf8Encoder.GetString(value, 1, prefixLength);
byte[] extValue = new byte[value.Length - prefixLength - 1];
Buffer.BlockCopy(value, 1 + prefixLength, extValue, 0, extValue.Length);
PrivateExtensions[extPrefix] = extValue;
break;
default:
System.Diagnostics.Debug.WriteLine("Unknown SDES Type " + buffer[offset] + " received.");
return;
}
offset += 2 + value.Length;
}
}
