| public abstract WriteCode ( int code ) : void | ||
| code | int | |
| return | void | |
public override void WriteValue(UnionValues currentValue)
{
ulong valueRaw = currentValue.ValueUInt64;
if (PrevValue1 == valueRaw)
{
BitStream.WriteCode(Codes64.Value1);
}
else if (PrevValue2 == valueRaw)
{
BitStream.WriteCode(Codes64.Value2);
PrevValue2 = PrevValue1;
PrevValue1 = valueRaw;
}
else if (PrevValue3 == valueRaw)
{
BitStream.WriteCode(Codes64.Value3);
PrevValue3 = PrevValue2;
PrevValue2 = PrevValue1;
PrevValue1 = valueRaw;
}
else if (valueRaw == 0)
{
BitStream.WriteCode(Codes64.ValueZero);
PrevValue3 = PrevValue2;
PrevValue2 = PrevValue1;
PrevValue1 = 0;
}
else
{
ulong bitsChanged = valueRaw ^ PrevValue1;
if (bitsChanged == Bits0)
{
throw new Exception("Programming Error");
}
else if (bitsChanged <= Bits8)
{
BitStream.WriteCode(Codes64.ValueXOR8);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Position++;
}
else if (bitsChanged <= Bits16)
{
BitStream.WriteCode(Codes64.ValueXOR16);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Position = Buffer.Position + 2;
}
else if (bitsChanged <= Bits24)
{
BitStream.WriteCode(Codes64.ValueXOR24);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Position = Buffer.Position + 3;
}
else if (bitsChanged <= Bits32)
{
BitStream.WriteCode(Codes64.ValueXOR32);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Data[Buffer.Position + 3] = (byte)(bitsChanged >> 24);
Buffer.Position = Buffer.Position + 4;
}
else if (bitsChanged <= Bits40)
{
BitStream.WriteCode(Codes64.ValueXOR40);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Data[Buffer.Position + 3] = (byte)(bitsChanged >> 24);
Buffer.Data[Buffer.Position + 4] = (byte)(bitsChanged >> 32);
Buffer.Position = Buffer.Position + 5;
}
else if (bitsChanged <= Bits48)
{
BitStream.WriteCode(Codes64.ValueXOR48);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Data[Buffer.Position + 3] = (byte)(bitsChanged >> 24);
Buffer.Data[Buffer.Position + 4] = (byte)(bitsChanged >> 32);
Buffer.Data[Buffer.Position + 5] = (byte)(bitsChanged >> 40);
Buffer.Position = Buffer.Position + 6;
}
else if (bitsChanged <= Bits56)
{
BitStream.WriteCode(Codes64.ValueXOR56);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Data[Buffer.Position + 3] = (byte)(bitsChanged >> 24);
Buffer.Data[Buffer.Position + 4] = (byte)(bitsChanged >> 32);
Buffer.Data[Buffer.Position + 5] = (byte)(bitsChanged >> 40);
Buffer.Data[Buffer.Position + 6] = (byte)(bitsChanged >> 48);
Buffer.Position = Buffer.Position + 7;
}
else
{
BitStream.WriteCode(Codes64.ValueXOR64);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Data[Buffer.Position + 3] = (byte)(bitsChanged >> 24);
Buffer.Data[Buffer.Position + 4] = (byte)(bitsChanged >> 32);
Buffer.Data[Buffer.Position + 5] = (byte)(bitsChanged >> 40);
Buffer.Data[Buffer.Position + 6] = (byte)(bitsChanged >> 48);
Buffer.Data[Buffer.Position + 7] = (byte)(bitsChanged >> 56);
Buffer.Position = Buffer.Position + 8;
}
PrevValue3 = PrevValue2;
PrevValue2 = PrevValue1;
PrevValue1 = valueRaw;
}
}
public override void WriteValue(UnionValues currentValue)
{
uint value = currentValue.ValueUInt32;
if (PrevValue1 == value)
{
BitStream.WriteCode(Codes32.Value1);
}
else if (PrevValue2 == value)
{
BitStream.WriteCode(Codes32.Value2);
PrevValue2 = PrevValue1;
PrevValue1 = value;
}
else if (PrevValue3 == value)
{
BitStream.WriteCode(Codes32.Value3);
PrevValue3 = PrevValue2;
PrevValue2 = PrevValue1;
PrevValue1 = value;
}
else if (value == 0)
{
BitStream.WriteCode(Codes32.ValueZero);
PrevValue3 = PrevValue2;
PrevValue2 = PrevValue1;
PrevValue1 = 0;
}
else
{
uint bitsChanged = value ^ PrevValue1;
if (bitsChanged == Bits0)
{
throw new Exception("Programming Error");
}
else if (bitsChanged <= Bits4)
{
BitStream.WriteCode4(Codes32.ValueXOR4, (byte)bitsChanged);
}
else if (bitsChanged <= Bits8)
{
BitStream.WriteCode(Codes32.ValueXOR8);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Position++;
}
else if (bitsChanged <= Bits12)
{
BitStream.WriteCode4(Codes32.ValueXOR12, (byte)bitsChanged);
Buffer.Data[Buffer.Position] = (byte)(bitsChanged >> 4);
Buffer.Position++;
}
else if (bitsChanged <= Bits16)
{
BitStream.WriteCode(Codes32.ValueXOR16);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Position = Buffer.Position + 2;
}
else if (bitsChanged <= Bits20)
{
BitStream.WriteCode4(Codes32.ValueXOR20, (byte)bitsChanged);
Buffer.Data[Buffer.Position] = (byte)(bitsChanged >> 4);
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 12);
Buffer.Position = Buffer.Position + 2;
}
else if (bitsChanged <= Bits24)
{
BitStream.WriteCode(Codes32.ValueXOR24);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Position = Buffer.Position + 3;
}
else if (bitsChanged <= Bits28)
{
BitStream.WriteCode4(Codes32.ValueXOR28, (byte)bitsChanged);
Buffer.Data[Buffer.Position] = (byte)(bitsChanged >> 4);
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 12);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 20);
Buffer.Position = Buffer.Position + 3;
}
else
{
BitStream.WriteCode(Codes32.ValueXOR32);
Buffer.Data[Buffer.Position] = (byte)bitsChanged;
Buffer.Data[Buffer.Position + 1] = (byte)(bitsChanged >> 8);
Buffer.Data[Buffer.Position + 2] = (byte)(bitsChanged >> 16);
Buffer.Data[Buffer.Position + 3] = (byte)(bitsChanged >> 24);
Buffer.Position = Buffer.Position + 4;
}
PrevValue3 = PrevValue2;
PrevValue2 = PrevValue1;
PrevValue1 = value;
}
}