public static SdpDataElement CreateAlternative(IEnumerable <SdpDataElement> value)
{
SdpDataElement e = new SdpDataElement(value);
e._type = SdpDataElementType.Alternative;
return(e);
}
public static SdpDataElement CreateUuid16(ushort value)
{
SdpDataElement e = new SdpDataElement(value);
e._type = SdpDataElementType.Uuid16;
return(e);
}
private static SdpDataElement FromByteArray(byte[] rawData, ref int offset, int len)
{
SdpDataElement element = new SdpDataElement();
element._type = (SdpDataElementType)rawData[offset];
switch (element._type)
{
case SdpDataElementType.Boolean:
element._value = false;
offset += 1;
break;
case SdpDataElementType.BooleanTrue:
element._value = true;
element._type = SdpDataElementType.Boolean;
offset += 1;
break;
case SdpDataElementType.Byte:
element._value = rawData[offset + 1];
offset += 2;
break;
case SdpDataElementType.Uuid16:
case SdpDataElementType.UInt16:
element._value = BitConverter.ToUInt16(rawData, offset + 1);
offset += 3;
break;
case SdpDataElementType.UInt32:
case SdpDataElementType.Uuid32:
element._value = BitConverter.ToUInt32(rawData, offset + 1);
offset += 5;
break;
case SdpDataElementType.UInt64:
element._value = BitConverter.ToUInt64(rawData, offset + 1);
offset += 9;
break;
case SdpDataElementType.UInt128:
case SdpDataElementType.Int128:
case SdpDataElementType.Uuid128:
byte[] guidBytes = new byte[16];
Buffer.BlockCopy(rawData, offset + 1, guidBytes, 0, 16);
element._value = new Guid(guidBytes);
offset += 17;
break;
case SdpDataElementType.SByte:
element._value = Convert.ToSByte(rawData[offset + 1]);
offset += 2;
break;
case SdpDataElementType.Int16:
element._value = BitConverter.ToInt16(rawData, offset + 1);
offset += 3;
break;
case SdpDataElementType.Int32:
element._value = BitConverter.ToInt32(rawData, offset + 1);
offset += 5;
break;
case SdpDataElementType.Int64:
element._value = BitConverter.ToInt64(rawData, offset + 1);
offset += 9;
break;
case SdpDataElementType.Alternative:
case SdpDataElementType.Sequence:
byte qlen = rawData[offset + 1];
int soffset = offset + 2;
int end = soffset + qlen;
List <SdpDataElement> elements = new List <SdpDataElement> {
SdpDataElement.FromByteArray(rawData, ref soffset, end)
};
while (soffset < end)
{
elements.Add(SdpDataElement.FromByteArray(rawData, ref soffset, end));
}
element._value = elements;
offset += (2 + qlen);
break;
case SdpDataElementType.String:
byte slen = rawData[offset + 1];
string sval = System.Text.Encoding.UTF8.GetString(rawData, offset + 2, slen);
element._value = sval;
offset += (2 + slen);
break;
case SdpDataElementType.Uri:
byte ulen = rawData[offset + 1];
string uval = System.Text.Encoding.UTF8.GetString(rawData, offset + 2, ulen);
element._value = new Uri(uval);
offset += (2 + ulen);
break;
case SdpDataElementType.LongAlternative:
case SdpDataElementType.LongSequence:
ushort lqlen = BitConverter.ToUInt16(rawData, offset + 1);
int lsoffset = offset + 3;
int lend = lsoffset + lqlen;
List <SdpDataElement> lelements = new List <SdpDataElement> {
SdpDataElement.FromByteArray(rawData, ref lsoffset, lend)
};
while (lsoffset < lend)
{
lelements.Add(SdpDataElement.FromByteArray(rawData, ref lsoffset, lend));
}
element._value = lelements;
offset += (3 + lqlen);
break;
case SdpDataElementType.LongString:
ushort lslen = BitConverter.ToUInt16(rawData, offset + 1);
string lsval = System.Text.Encoding.UTF8.GetString(rawData, offset + 3, lslen);
element._value = lsval;
offset += (3 + lslen);
break;
case SdpDataElementType.LongUri:
ushort lulen = BitConverter.ToUInt16(rawData, offset + 1);
string luval = System.Text.Encoding.UTF8.GetString(rawData, offset + 3, lulen);
element._value = new Uri(luval);
offset += (3 + lulen);
break;
case SdpDataElementType.HugeAlternative:
case SdpDataElementType.HugeSequence:
int hqlen = BitConverter.ToInt32(rawData, offset + 1);
int hsoffset = offset + 5;
int hend = hsoffset + hqlen;
List <SdpDataElement> helements = new List <SdpDataElement> {
SdpDataElement.FromByteArray(rawData, ref hsoffset, hend)
};
while (hsoffset < hend)
{
helements.Add(SdpDataElement.FromByteArray(rawData, ref hsoffset, hend));
}
element._value = helements;
offset += (5 + hqlen);
break;
case SdpDataElementType.HugeString:
int hslen = BitConverter.ToInt32(rawData, offset + 1);
string hsval = System.Text.Encoding.UTF8.GetString(rawData, offset + 5, hslen);
element._value = hsval;
offset += (5 + hslen);
break;
case SdpDataElementType.HugeUri:
int hulen = BitConverter.ToInt32(rawData, offset + 1);
string huval = System.Text.Encoding.UTF8.GetString(rawData, offset + 5, hulen);
element._value = new Uri(huval);
offset += (5 + hulen);
break;
}
return(element);
}
