private PatchHeader DecodePatchHeader(BitPack bitpack)
{
PatchHeader header = new PatchHeader();
// Quantized word bits
header.QuantWBits = bitpack.UnpackBits(8);
if (header.QuantWBits == END_OF_PATCHES)
{
return(header);
}
// DC offset
header.DCOffset = bitpack.UnpackFloat();
// Range
header.Range = bitpack.UnpackBits(16);
// Patch IDs (10 bits)
header.PatchIDs = bitpack.UnpackBits(10);
// Word bits
header.WordBits = (uint)((header.QuantWBits & 0x0f) + 2);
return(header);
}
private void DecodePatch(int[] patches, BitPack bitpack, PatchHeader header, int size)
{
int temp;
for (int n = 0; n < size * size; n++)
{
// ?
temp = bitpack.UnpackBits(1);
if (temp != 0)
{
// Value or EOB
temp = bitpack.UnpackBits(1);
if (temp != 0)
{
// Value
temp = bitpack.UnpackBits(1);
if (temp != 0)
{
// Negative
temp = bitpack.UnpackBits((int)header.WordBits);
patches[n] = temp * -1;
}
else
{
// Positive
temp = bitpack.UnpackBits((int)header.WordBits);
patches[n] = temp;
}
}
else
{
// Set the rest to zero
// TODO: This might not be necessary
for (int o = n; o < size * size; o++)
{
patches[o] = 0;
}
break;
}
}
else
{
patches[n] = 0;
}
}
}
private void LayerDataHandler(Packet packet, Simulator simulator)
{
LayerDataPacket layer = (LayerDataPacket)packet;
BitPack bitpack = new BitPack(layer.LayerData.Data, 0);
GroupHeader header = new GroupHeader();
LayerType type = (LayerType)layer.LayerID.Type;
// Stride
header.Stride = bitpack.UnpackBits(16);
// Patch size
header.PatchSize = bitpack.UnpackBits(8);
// Layer type
header.Type = (LayerType)bitpack.UnpackBits(8);
switch (type)
{
case LayerType.Land:
if (OnLandPatch != null || Client.Settings.STORE_LAND_PATCHES)
{
DecompressLand(simulator, bitpack, header);
}
break;
case LayerType.Water:
Logger.Log("Got a Water LayerData packet, implement me!", Helpers.LogLevel.Error, Client);
break;
case LayerType.Wind:
DecompressWind(simulator, bitpack, header);
break;
case LayerType.Cloud:
DecompressCloud(simulator, bitpack, header);
break;
default:
Logger.Log("Unrecognized LayerData type " + type.ToString(), Helpers.LogLevel.Warning, Client);
break;
}
}
private void LayerDataHandler(Packet packet, Simulator simulator)
{
LayerDataPacket layer = (LayerDataPacket)packet;
BitPack bitpack = new BitPack(layer.LayerData.Data, 0);
GroupHeader header = new GroupHeader();
LayerType type = (LayerType)layer.LayerID.Type;
// Stride
header.Stride = bitpack.UnpackBits(16);
// Patch size
header.PatchSize = bitpack.UnpackBits(8);
// Layer type
header.Type = (LayerType)bitpack.UnpackBits(8);
switch (type)
{
case LayerType.Land:
if (OnLandPatch != null || Client.Settings.STORE_LAND_PATCHES)
DecompressLand(simulator, bitpack, header);
break;
case LayerType.Water:
Logger.Log("Got a Water LayerData packet, implement me!", Helpers.LogLevel.Error, Client);
break;
case LayerType.Wind:
DecompressWind(simulator, bitpack, header);
break;
case LayerType.Cloud:
DecompressCloud(simulator, bitpack, header);
break;
default:
Logger.Log("Unrecognized LayerData type " + type.ToString(), Helpers.LogLevel.Warning, Client);
break;
}
}
private void DecodePatch(int[] patches, BitPack bitpack, PatchHeader header, int size)
{
int temp;
for (int n = 0; n < size * size; n++)
{
// ?
temp = bitpack.UnpackBits(1);
if (temp != 0)
{
// Value or EOB
temp = bitpack.UnpackBits(1);
if (temp != 0)
{
// Value
temp = bitpack.UnpackBits(1);
if (temp != 0)
{
// Negative
temp = bitpack.UnpackBits((int)header.WordBits);
patches[n] = temp * -1;
}
else
{
// Positive
temp = bitpack.UnpackBits((int)header.WordBits);
patches[n] = temp;
}
}
else
{
// Set the rest to zero
// TODO: This might not be necessary
for (int o = n; o < size * size; o++)
{
patches[o] = 0;
}
break;
}
}
else
{
patches[n] = 0;
}
}
}
private PatchHeader DecodePatchHeader(BitPack bitpack)
{
PatchHeader header = new PatchHeader();
// Quantized word bits
header.QuantWBits = bitpack.UnpackBits(8);
if (header.QuantWBits == END_OF_PATCHES)
return header;
// DC offset
header.DCOffset = bitpack.UnpackFloat();
// Range
header.Range = bitpack.UnpackBits(16);
// Patch IDs (10 bits)
header.PatchIDs = bitpack.UnpackBits(10);
// Word bits
header.WordBits = (uint)((header.QuantWBits & 0x0f) + 2);
return header;
}
public void BitPacking()
{
byte[] packedBytes = new byte[12];
BitPack bitpacker = new BitPack(packedBytes, 0);
bitpacker.PackBits(0x0ABBCCDD, 32);
bitpacker.PackBits(25, 5);
bitpacker.PackFloat(123.321f);
bitpacker.PackBits(1000, 16);
bitpacker = new BitPack(packedBytes, 0);
int b = bitpacker.UnpackBits(32);
Assert.IsTrue(b == 0x0ABBCCDD, "Unpacked " + b + " instead of 2864434397");
b = bitpacker.UnpackBits(5);
Assert.IsTrue(b == 25, "Unpacked " + b + " instead of 25");
float f = bitpacker.UnpackFloat();
Assert.IsTrue(f == 123.321f, "Unpacked " + f + " instead of 123.321");
b = bitpacker.UnpackBits(16);
Assert.IsTrue(b == 1000, "Unpacked " + b + " instead of 1000");
}
public void BitUnpacking()
{
byte[] data = new byte[] { 0x80, 0x00, 0x0F, 0x50, 0x83, 0x7D };
BitPack bitpacker = new BitPack(data, 0);
int b = bitpacker.UnpackBits(1);
Assert.IsTrue(b == 1, "Unpacked " + b + " instead of 1");
b = bitpacker.UnpackBits(1);
Assert.IsTrue(b == 0, "Unpacked " + b + " instead of 0");
bitpacker = new BitPack(data, 2);
b = bitpacker.UnpackBits(4);
Assert.IsTrue(b == 0, "Unpacked " + b + " instead of 0");
b = bitpacker.UnpackBits(8);
Assert.IsTrue(b == 0xF5, "Unpacked " + b + " instead of 0xF5");
b = bitpacker.UnpackBits(4);
Assert.IsTrue(b == 0, "Unpacked " + b + " instead of 0");
b = bitpacker.UnpackBits(10);
Assert.IsTrue(b == 0x0183, "Unpacked " + b + " instead of 0x0183");
}
