public ElementInfo(EBMLDocElement docElement, Int64 idPos, Int64 vintPos, Int64 dataPos, Int64? dataLength) {
DocElement = docElement;
IdPos = idPos;
VIntPos = vintPos;
DataPos = dataPos;
DataLength = dataLength;
}
public ElementInfo WriteElement(EBMLDocElement elem, Stream data)
{
Int64 idPos = dataSrc.Position;
dataSrc.WriteIdentifier(elem.Id);
Int64 vIntPos = dataSrc.Position;
dataSrc.WriteFakeVInt(8);
Int64 dataPos = dataSrc.Position;
dataSrc.Write(data);
var elemInfo = new ElementInfo(elem, idPos, vIntPos, dataPos, null);
UpdateElementLength(elemInfo);
return elemInfo;
}
protected override byte[] TransformElement(EBMLDocElement elem, object value)
{
throw new NotImplementedException();
}
protected override object RetrieveByExtension(EBMLDocElement docElem, byte[] data, long offset, long length)
{
if(docElem.Id == (int)Block.Id || docElem.Id == (int)SimpleBlock.Id) {
return new MatroskaBlock(data, offset, (int)length);
} else {
throw new Exception("Unhandled ElementType");
}
}
public ElementInfo WriteElement(EBMLDocElement elem, byte[] b, int offset, int length)
{
Int64 idPos = dataSrc.Position;
dataSrc.WriteIdentifier(elem.Id);
Int64 vIntPos = dataSrc.Position;
dataSrc.WriteVInt(length);
Int64 dataPos = dataSrc.Position;
dataSrc.Write(b, offset, length);
return new ElementInfo(elem, idPos, vIntPos, dataPos, b.Length);
}
public ElementInfo WriteElement(EBMLDocElement elem, Object value)
{
var binElem = ebmlDoc.TransformDocElement(elem, value);
return WriteElement(elem, binElem, 0, binElem.Length);
}
public MasterElementInfo WriteMasterElement(EBMLDocElement elem)
{
Int64 idPos = dataSrc.Position;
dataSrc.WriteIdentifier(elem.Id);
Int64 vIntPos = dataSrc.Position;
dataSrc.WriteFakeVInt(8);
var elemInfo = new MasterElementInfo(elem, idPos, vIntPos, dataSrc.Position, null);
elemInfo.Disposed += (s, e) => UpdateElementLength((ElementInfo)s);
return elemInfo;
}
protected virtual Byte[] TransformElement(EBMLDocElement elem, Object value)
{
throw new NotSupportedException();
}
protected virtual object RetrieveByExtension(EBMLDocElement docElem, byte[] data, long offset, long length)
{
throw new NotSupportedException();
}
public Byte[] TransformDocElement(EBMLDocElement elem, Object value)
{
switch(elem.Type) {
case EBMLElementType.Binary: return (Byte[])value;
case EBMLElementType.SInteger: return TransformElement((Int64)value);
case EBMLElementType.UInteger: return TransformElement((UInt64)value);
case EBMLElementType.Float: return value is Single ? TransformElement((Single)value) : TransformElement((Double)value);
case EBMLElementType.UTF8: return TransformElement((String)value, false);
case EBMLElementType.ASCII: return TransformElement((String)value, true);
case EBMLElementType.Date: return TransformElement((DateTime)value);
case EBMLElementType.Custom: return TransformDocElement(elem, value);
case EBMLElementType.Unknown:
case EBMLElementType.Master:
default: throw new Exception();
}
}
public object RetrieveValue(EBMLDocElement docElem, Byte[] data, Int64 offset, Int64 length)
{
if(offset > Int32.MaxValue || length > Int32.MaxValue) throw new Exception();
switch(docElem.Type) {
case EBMLElementType.Master:
case EBMLElementType.Unknown:
case EBMLElementType.Binary: return RetrieveBinary(data, offset, length);
case EBMLElementType.SInteger: return RetrieveSInteger(data, offset, length);
case EBMLElementType.UInteger: return RetrieveInteger(data, offset, length);
//case EBMLElementType.Double: return RetrieveDouble(data, offset);
case EBMLElementType.Float: return length == 4 ? (double)RetrieveFloat(data, offset) : RetrieveDouble(data, offset);
case EBMLElementType.UTF8: return RetrieveUTF8(data, offset, length);
case EBMLElementType.ASCII: return RetrieveASCII(data, offset, length);
case EBMLElementType.Date: return RetrieveDate(data, offset, length);
case EBMLElementType.Custom: return RetrieveByExtension(docElem, data, offset, length);
default: throw new Exception("Unhandled ElementType");
}
}
public EBMLDocElement RetrieveDocElement(Int32 id)
{
EBMLDocElement elementType = (docElementMap.TryGetValue(id, out elementType) ? elementType : null);
if(elementType == null) elementType = new EBMLDocElement(id, EBMLElementType.Unknown, "Unknown");
return elementType;
}
protected override object RetrieveByExtension(EBMLDocElement docElem, byte[] data, long offset, long length)
{
if(docElem.Id == Position.Id || docElem.Id == Motion.Id) {
return new double[] {
EBMLDocType.RetrieveDouble(data, offset),
EBMLDocType.RetrieveDouble(data, offset + 8),
EBMLDocType.RetrieveDouble(data, offset + 16)
};
} else if(docElem.Id == Rotation.Id) {
return new Single[] {
EBMLDocType.RetrieveFloat(data, offset),
EBMLDocType.RetrieveFloat(data, offset + 4),
};
} else if(docElem.Id == IntegralPosition.Id) {
Byte[] b = new Byte[length];
Buffer.BlockCopy(data, (Int32)offset, b, 0, (Int32)length);
if(BitConverter.IsLittleEndian) {
Array.Reverse(b, 0, 4);
Array.Reverse(b, 4, 4);
Array.Reverse(b, 8, 4);
}
return new int[] {
BitConverter.ToInt32(b, 0),
BitConverter.ToInt32(b, 4),
BitConverter.ToInt32(b, 8),
};
} else if(docElem.Id == Coordinates.Id) {
Byte[] b = new Byte[length];
Buffer.BlockCopy(data, (Int32)offset, b, 0, (Int32)length);
if(BitConverter.IsLittleEndian) {
Array.Reverse(b, 0, 8);
Array.Reverse(b, 8, 8);
}
return new long[] {
BitConverter.ToInt64(b, 0),
BitConverter.ToInt64(b, 8),
};
} else if(docElem.Id == CubesSym.Id || docElem.Id == ChunksSym.Id || docElem.Id == RegionsSym.Id || docElem.Id == WorldStatesSym.Id) {
Byte[] b = new Byte[length];
Buffer.BlockCopy(data, (Int32)offset, b, 0, (Int32)length);
if(BitConverter.IsLittleEndian) {
for(int i = 0;i < b.Length;i += 8) Array.Reverse(b, i, 8);
}
var values = new ulong[length / 8];
for(int i = 0;i < values.Length;i++) values[i] = BitConverter.ToUInt64(b, i * 8);
return values;
}
throw new Exception("Unknown Element");
}
protected override byte[] TransformElement(EBMLDocElement docElem, object value)
{
if(docElem.Id == Position.Id || docElem.Id == Motion.Id) {
var v = (double[])value;
var b = new Byte[24];
Buffer.BlockCopy(EBMLDocType.TransformElement(v[0]), 0, b, 0, 8);
Buffer.BlockCopy(EBMLDocType.TransformElement(v[1]), 0, b, 8, 8);
Buffer.BlockCopy(EBMLDocType.TransformElement(v[2]), 0, b, 16, 8);
return b;
} else if(docElem.Id == Rotation.Id) {
var v = (Single[])value;
var b = new Byte[8];
Buffer.BlockCopy(EBMLDocType.TransformElement(v[0]), 0, b, 0, 4);
Buffer.BlockCopy(EBMLDocType.TransformElement(v[1]), 0, b, 4, 4);
return b;
} else if(docElem.Id == IntegralPosition.Id) {
var v = (Int32[])value;
var b = new Byte[12];
Buffer.BlockCopy(EBMLDocType.TransformElement(v[0]), 0, b, 0, 8);
Buffer.BlockCopy(EBMLDocType.TransformElement(v[1]), 0, b, 4, 8);
Buffer.BlockCopy(EBMLDocType.TransformElement(v[2]), 0, b, 8, 8);
return b;
} else if(docElem.Id == Coordinates.Id) {
var v = (Int64[])value;
var b = new Byte[v.Length * 8];
for(int i = 0;i < v.Length;i++) Buffer.BlockCopy(EBMLDocType.TransformElement(v[i]), 0, b, i * 8, 8);
return b;
} else if(docElem.Id == CubesSym.Id || docElem.Id == ChunksSym.Id || docElem.Id == RegionsSym.Id || docElem.Id == WorldStatesSym.Id) {
var v = (UInt64[])value;
var b = new Byte[v.Length * 8];
for(int i = 0;i < v.Length;i++) Buffer.BlockCopy(EBMLDocType.TransformElement(v[i]), 0, b, i * 8, 8);
return b;
}
throw new Exception("Unknown Element");
}
public MasterElementInfo(EBMLDocElement docElement, Int64 idPos, Int64 vintPos, Int64 dataPos, Int64? dataLength) : base(docElement, idPos, vintPos, dataPos, dataLength) { }
