mirror of
https://github.com/opensim/opensim.git
synced 2026-05-22 00:19:03 +08:00
beeec1c467
Routines in Util to compute region world coordinates from region coordinates as well as the conversion to and from region handles. These routines have replaced a lot of math scattered throughout the simulator. Should be no functional changes.
945 lines
36 KiB
C#
945 lines
36 KiB
C#
/*
|
|
* Copyright (c) Contributors, http://opensimulator.org/
|
|
* See CONTRIBUTORS.TXT for a full list of copyright holders.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of the OpenSimulator Project nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/* Freely adapted from the Aurora version of the terrain compressor.
|
|
* Copyright (c) Contributors, http://aurora-sim.org/, http://opensimulator.org/
|
|
*/
|
|
|
|
using System;
|
|
using System.Reflection;
|
|
|
|
using log4net;
|
|
|
|
using OpenSim.Framework;
|
|
using OpenSim.Region.Framework;
|
|
using OpenSim.Region.Framework.Scenes;
|
|
|
|
using OpenMetaverse;
|
|
using OpenMetaverse.Packets;
|
|
|
|
namespace OpenSim.Region.ClientStack.LindenUDP
|
|
{
|
|
public static class OpenSimTerrainCompressor
|
|
{
|
|
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
|
|
private static string LogHeader = "[TERRAIN COMPRESSOR]";
|
|
|
|
public const int END_OF_PATCHES = 97;
|
|
|
|
private const float OO_SQRT2 = 0.7071067811865475244008443621049f;
|
|
private const int STRIDE = 264;
|
|
|
|
private const int ZERO_CODE = 0x0;
|
|
private const int ZERO_EOB = 0x2;
|
|
private const int POSITIVE_VALUE = 0x6;
|
|
private const int NEGATIVE_VALUE = 0x7;
|
|
|
|
private static readonly float[] DequantizeTable16 =
|
|
new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
private static readonly float[] DequantizeTable32 =
|
|
new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
private static readonly float[] CosineTable16 = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
//private static readonly float[] CosineTable32 = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
|
|
private static readonly int[] CopyMatrix16 = new int[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
private static readonly int[] CopyMatrix32 = new int[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
private static readonly float[] QuantizeTable16 =
|
|
new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
static OpenSimTerrainCompressor()
|
|
{
|
|
// Initialize the decompression tables
|
|
BuildDequantizeTable16();
|
|
SetupCosines16();
|
|
BuildCopyMatrix16();
|
|
BuildQuantizeTable16();
|
|
}
|
|
|
|
// Unused: left for historical reference.
|
|
public static LayerDataPacket CreateLayerDataPacket(TerrainPatch[] patches, byte type, int pRegionSizeX,
|
|
int pRegionSizeY)
|
|
{
|
|
LayerDataPacket layer = new LayerDataPacket {LayerID = {Type = type}};
|
|
|
|
TerrainPatch.GroupHeader header = new TerrainPatch.GroupHeader
|
|
{Stride = STRIDE, PatchSize = Constants.TerrainPatchSize};
|
|
|
|
// Should be enough to fit even the most poorly packed data
|
|
byte[] data = new byte[patches.Length*Constants.TerrainPatchSize*Constants.TerrainPatchSize*2];
|
|
BitPack bitpack = new BitPack(data, 0);
|
|
bitpack.PackBits(header.Stride, 16);
|
|
bitpack.PackBits(header.PatchSize, 8);
|
|
bitpack.PackBits(type, 8);
|
|
|
|
foreach (TerrainPatch t in patches)
|
|
CreatePatch(bitpack, t.Data, t.X, t.Y, pRegionSizeX, pRegionSizeY);
|
|
|
|
bitpack.PackBits(END_OF_PATCHES, 8);
|
|
|
|
layer.LayerData.Data = new byte[bitpack.BytePos + 1];
|
|
Buffer.BlockCopy(bitpack.Data, 0, layer.LayerData.Data, 0, bitpack.BytePos + 1);
|
|
|
|
return layer;
|
|
}
|
|
|
|
// Create a land packet for a single patch.
|
|
public static LayerDataPacket CreateLandPacket(TerrainData terrData, int patchX, int patchY)
|
|
{
|
|
int[] xPieces = new int[1];
|
|
int[] yPieces = new int[1];
|
|
xPieces[0] = patchX; // patch X dimension
|
|
yPieces[0] = patchY;
|
|
|
|
byte landPacketType = (byte)TerrainPatch.LayerType.Land;
|
|
if (terrData.SizeX > Constants.RegionSize || terrData.SizeY > Constants.RegionSize)
|
|
{
|
|
// libOMV does not have a packet type defined for the extended parcel format.
|
|
// We just happen to know the extended parcel format code is one more than the usual code.
|
|
landPacketType++;
|
|
}
|
|
|
|
return CreateLandPacket(terrData, xPieces, yPieces, landPacketType);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Creates a LayerData packet for compressed land data given a full
|
|
/// simulator heightmap and an array of indices of patches to compress
|
|
/// </summary>
|
|
/// <param name="terrData">
|
|
/// Terrain data that can result in a meter square heightmap.
|
|
/// </param>
|
|
/// <param name="x">
|
|
/// Array of indexes in the grid of patches
|
|
/// for this simulator.
|
|
/// If creating a packet for multiple patches, there will be entries in
|
|
/// both the X and Y arrays for each of the patches.
|
|
/// For example if patches 1 and 17 are to be sent,
|
|
/// x[] = {1,1} and y[] = {0,1} which specifies the patches at
|
|
/// indexes <1,0> and <1,1> (presuming the terrain size is 16x16 patches).
|
|
/// </param>
|
|
/// <param name="y">
|
|
/// Array of indexes in the grid of patches.
|
|
/// </param>
|
|
/// <param name="type"></param>
|
|
/// <param name="pRegionSizeX"></param>
|
|
/// <param name="pRegionSizeY"></param>
|
|
/// <returns></returns>
|
|
public static LayerDataPacket CreateLandPacket(TerrainData terrData, int[] x, int[] y, byte type)
|
|
{
|
|
LayerDataPacket layer = new LayerDataPacket {LayerID = {Type = type}};
|
|
|
|
TerrainPatch.GroupHeader header = new TerrainPatch.GroupHeader
|
|
{Stride = STRIDE, PatchSize = Constants.TerrainPatchSize};
|
|
|
|
byte[] data = new byte[x.Length * Constants.TerrainPatchSize * Constants.TerrainPatchSize * 2];
|
|
BitPack bitpack = new BitPack(data, 0);
|
|
bitpack.PackBits(header.Stride, 16);
|
|
bitpack.PackBits(header.PatchSize, 8);
|
|
bitpack.PackBits(type, 8);
|
|
|
|
for (int i = 0; i < x.Length; i++)
|
|
CreatePatchFromHeightmap(bitpack, terrData, x[i], y[i]);
|
|
|
|
bitpack.PackBits(END_OF_PATCHES, 8);
|
|
|
|
layer.LayerData.Data = new byte[bitpack.BytePos + 1];
|
|
Buffer.BlockCopy(bitpack.Data, 0, layer.LayerData.Data, 0, bitpack.BytePos + 1);
|
|
|
|
return layer;
|
|
}
|
|
|
|
// Unused: left for historical reference.
|
|
public static void CreatePatch(BitPack output, float[] patchData, int x, int y, int pRegionSizeX, int pRegionSizeY)
|
|
{
|
|
TerrainPatch.Header header = PrescanPatch(patchData);
|
|
header.QuantWBits = 136;
|
|
if (pRegionSizeX > Constants.RegionSize || pRegionSizeY > Constants.RegionSize)
|
|
{
|
|
header.PatchIDs = (y & 0xFFFF);
|
|
header.PatchIDs += (x << 16);
|
|
}
|
|
else
|
|
{
|
|
header.PatchIDs = (y & 0x1F);
|
|
header.PatchIDs += (x << 5);
|
|
}
|
|
|
|
// NOTE: No idea what prequant and postquant should be or what they do
|
|
|
|
int wbits;
|
|
int[] patch = CompressPatch(patchData, header, 10, out wbits);
|
|
wbits = EncodePatchHeader(output, header, patch, (uint)pRegionSizeX, (uint)pRegionSizeY, wbits);
|
|
EncodePatch(output, patch, 0, wbits);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Add a patch of terrain to a BitPacker
|
|
/// </summary>
|
|
/// <param name="output">BitPacker to write the patch to</param>
|
|
/// <param name="heightmap">
|
|
/// Heightmap of the simulator. Presumed to be an sizeX*sizeY array.
|
|
/// </param>
|
|
/// <param name="patchX">
|
|
/// X offset of the patch to create.
|
|
/// </param>
|
|
/// <param name="patchY">
|
|
/// Y offset of the patch to create.
|
|
/// </param>
|
|
/// <param name="pRegionSizeX"></param>
|
|
/// <param name="pRegionSizeY"></param>
|
|
public static void CreatePatchFromHeightmap(BitPack output, TerrainData terrData, int patchX, int patchY)
|
|
{
|
|
TerrainPatch.Header header = PrescanPatch(terrData, patchX, patchY);
|
|
header.QuantWBits = 136;
|
|
|
|
// If larger than legacy region size, pack patch X and Y info differently.
|
|
if (terrData.SizeX > Constants.RegionSize || terrData.SizeY > Constants.RegionSize)
|
|
{
|
|
header.PatchIDs = (patchY & 0xFFFF);
|
|
header.PatchIDs += (patchX << 16);
|
|
}
|
|
else
|
|
{
|
|
header.PatchIDs = (patchY & 0x1F);
|
|
header.PatchIDs += (patchX << 5);
|
|
}
|
|
|
|
// m_log.DebugFormat("{0} CreatePatchFromHeightmap. patchX={1}, patchY={2}, DCOffset={3}, range={4}",
|
|
// LogHeader, patchX, patchY, header.DCOffset, header.Range);
|
|
|
|
// NOTE: No idea what prequant and postquant should be or what they do
|
|
int wbits;
|
|
int[] patch = CompressPatch(terrData, patchX, patchY, header, 10, out wbits);
|
|
wbits = EncodePatchHeader(output, header, patch, (uint)terrData.SizeX, (uint)terrData.SizeY, wbits);
|
|
EncodePatch(output, patch, 0, wbits);
|
|
}
|
|
|
|
private static TerrainPatch.Header PrescanPatch(float[] patch)
|
|
{
|
|
TerrainPatch.Header header = new TerrainPatch.Header();
|
|
float zmax = -99999999.0f;
|
|
float zmin = 99999999.0f;
|
|
|
|
for (int i = 0; i < Constants.TerrainPatchSize*Constants.TerrainPatchSize; i++)
|
|
{
|
|
float val = patch[i];
|
|
if (val > zmax) zmax = val;
|
|
if (val < zmin) zmin = val;
|
|
}
|
|
|
|
header.DCOffset = zmin;
|
|
header.Range = (int) ((zmax - zmin) + 1.0f);
|
|
|
|
return header;
|
|
}
|
|
|
|
// Scan the height info we're returning and return a patch packet header for this patch.
|
|
private static TerrainPatch.Header PrescanPatch(TerrainData terrData, int patchX, int patchY)
|
|
{
|
|
TerrainPatch.Header header = new TerrainPatch.Header();
|
|
float zmax = -99999999.0f;
|
|
float zmin = 99999999.0f;
|
|
|
|
for (int j = patchY*Constants.TerrainPatchSize; j < (patchY + 1)*Constants.TerrainPatchSize; j++)
|
|
{
|
|
for (int i = patchX*Constants.TerrainPatchSize; i < (patchX + 1)*Constants.TerrainPatchSize; i++)
|
|
{
|
|
float val = terrData[i, j];
|
|
if (val > zmax) zmax = val;
|
|
if (val < zmin) zmin = val;
|
|
}
|
|
}
|
|
|
|
header.DCOffset = zmin;
|
|
header.Range = (int)(zmax - zmin + 1.0f);
|
|
|
|
return header;
|
|
}
|
|
|
|
public static TerrainPatch.Header DecodePatchHeader(BitPack bitpack)
|
|
{
|
|
TerrainPatch.Header header = new TerrainPatch.Header {QuantWBits = bitpack.UnpackBits(8)};
|
|
|
|
// Quantized word bits
|
|
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 static int EncodePatchHeader(BitPack output, TerrainPatch.Header header, int[] patch, uint pRegionSizeX,
|
|
uint pRegionSizeY, int wbits)
|
|
{
|
|
/*
|
|
int temp;
|
|
int wbits = (header.QuantWBits & 0x0f) + 2;
|
|
uint maxWbits = (uint)wbits + 5;
|
|
uint minWbits = ((uint)wbits >> 1);
|
|
int wbitsMaxValue;
|
|
*/
|
|
// goal is to determ minimum number of bits to use so all data fits
|
|
/*
|
|
wbits = (int)minWbits;
|
|
wbitsMaxValue = (1 << wbits);
|
|
|
|
for (int i = 0; i < patch.Length; i++)
|
|
{
|
|
temp = patch[i];
|
|
if (temp != 0)
|
|
{
|
|
// Get the absolute value
|
|
if (temp < 0) temp *= -1;
|
|
|
|
no coments..
|
|
|
|
for (int j = (int)maxWbits; j > (int)minWbits; j--)
|
|
{
|
|
if ((temp & (1 << j)) != 0)
|
|
{
|
|
if (j > wbits) wbits = j;
|
|
break;
|
|
}
|
|
}
|
|
|
|
while (temp > wbitsMaxValue)
|
|
{
|
|
wbits++;
|
|
if (wbits == maxWbits)
|
|
goto Done;
|
|
wbitsMaxValue = 1 << wbits;
|
|
}
|
|
}
|
|
}
|
|
|
|
Done:
|
|
|
|
// wbits += 1;
|
|
*/
|
|
// better check
|
|
if (wbits > 17)
|
|
wbits = 16;
|
|
else if (wbits < 3)
|
|
wbits = 3;
|
|
|
|
header.QuantWBits &= 0xf0;
|
|
|
|
header.QuantWBits |= (wbits - 2);
|
|
|
|
output.PackBits(header.QuantWBits, 8);
|
|
output.PackFloat(header.DCOffset);
|
|
output.PackBits(header.Range, 16);
|
|
if (pRegionSizeX > Constants.RegionSize || pRegionSizeY > Constants.RegionSize)
|
|
output.PackBits(header.PatchIDs, 32);
|
|
else
|
|
output.PackBits(header.PatchIDs, 10);
|
|
|
|
return wbits;
|
|
}
|
|
|
|
private static void IDCTColumn16(float[] linein, float[] lineout, int column)
|
|
{
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
float total = OO_SQRT2*linein[column];
|
|
|
|
for (int u = 1; u < Constants.TerrainPatchSize; u++)
|
|
{
|
|
int usize = u*Constants.TerrainPatchSize;
|
|
total += linein[usize + column]*CosineTable16[usize + n];
|
|
}
|
|
|
|
lineout[Constants.TerrainPatchSize*n + column] = total;
|
|
}
|
|
}
|
|
|
|
private static void IDCTLine16(float[] linein, float[] lineout, int line)
|
|
{
|
|
const float oosob = 2.0f/Constants.TerrainPatchSize;
|
|
int lineSize = line*Constants.TerrainPatchSize;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
float total = OO_SQRT2*linein[lineSize];
|
|
|
|
for (int u = 1; u < Constants.TerrainPatchSize; u++)
|
|
{
|
|
total += linein[lineSize + u]*CosineTable16[u*Constants.TerrainPatchSize + n];
|
|
}
|
|
|
|
lineout[lineSize + n] = total*oosob;
|
|
}
|
|
}
|
|
|
|
/*
|
|
private static void DCTLine16(float[] linein, float[] lineout, int line)
|
|
{
|
|
float total = 0.0f;
|
|
int lineSize = line * Constants.TerrainPatchSize;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
total += linein[lineSize + n];
|
|
}
|
|
|
|
lineout[lineSize] = OO_SQRT2 * total;
|
|
|
|
int uptr = 0;
|
|
for (int u = 1; u < Constants.TerrainPatchSize; u++)
|
|
{
|
|
total = 0.0f;
|
|
uptr += Constants.TerrainPatchSize;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
total += linein[lineSize + n] * CosineTable16[uptr + n];
|
|
}
|
|
|
|
lineout[lineSize + u] = total;
|
|
}
|
|
}
|
|
*/
|
|
|
|
private static void DCTLine16(float[] linein, float[] lineout, int line)
|
|
{
|
|
// outputs transpose data (lines exchanged with coluns )
|
|
// so to save a bit of cpu when doing coluns
|
|
float total = 0.0f;
|
|
int lineSize = line*Constants.TerrainPatchSize;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
total += linein[lineSize + n];
|
|
}
|
|
|
|
lineout[line] = OO_SQRT2*total;
|
|
|
|
for (int u = Constants.TerrainPatchSize;
|
|
u < Constants.TerrainPatchSize*Constants.TerrainPatchSize;
|
|
u += Constants.TerrainPatchSize)
|
|
{
|
|
total = 0.0f;
|
|
for (int ptrn = lineSize, ptru = u; ptrn < lineSize + Constants.TerrainPatchSize; ptrn++,ptru++)
|
|
{
|
|
total += linein[ptrn]*CosineTable16[ptru];
|
|
}
|
|
|
|
lineout[line + u] = total;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
private static void DCTColumn16(float[] linein, int[] lineout, int column)
|
|
{
|
|
float total = 0.0f;
|
|
// const float oosob = 2.0f / Constants.TerrainPatchSize;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
total += linein[Constants.TerrainPatchSize * n + column];
|
|
}
|
|
|
|
// lineout[CopyMatrix16[column]] = (int)(OO_SQRT2 * total * oosob * QuantizeTable16[column]);
|
|
lineout[CopyMatrix16[column]] = (int)(OO_SQRT2 * total * QuantizeTable16[column]);
|
|
|
|
for (int uptr = Constants.TerrainPatchSize; uptr < Constants.TerrainPatchSize * Constants.TerrainPatchSize; uptr += Constants.TerrainPatchSize)
|
|
{
|
|
total = 0.0f;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
total += linein[Constants.TerrainPatchSize * n + column] * CosineTable16[uptr + n];
|
|
}
|
|
|
|
// lineout[CopyMatrix16[Constants.TerrainPatchSize * u + column]] = (int)(total * oosob * QuantizeTable16[Constants.TerrainPatchSize * u + column]);
|
|
lineout[CopyMatrix16[uptr + column]] = (int)(total * QuantizeTable16[uptr + column]);
|
|
}
|
|
}
|
|
*/
|
|
|
|
private static void DCTColumn16(float[] linein, int[] lineout, int column)
|
|
{
|
|
// input columns are in fact stored in lines now
|
|
|
|
float total = 0.0f;
|
|
// const float oosob = 2.0f / Constants.TerrainPatchSize;
|
|
int inlinesptr = Constants.TerrainPatchSize*column;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
total += linein[inlinesptr + n];
|
|
}
|
|
|
|
// lineout[CopyMatrix16[column]] = (int)(OO_SQRT2 * total * oosob * QuantizeTable16[column]);
|
|
lineout[CopyMatrix16[column]] = (int) (OO_SQRT2*total*QuantizeTable16[column]);
|
|
|
|
for (int uptr = Constants.TerrainPatchSize;
|
|
uptr < Constants.TerrainPatchSize*Constants.TerrainPatchSize;
|
|
uptr += Constants.TerrainPatchSize)
|
|
{
|
|
total = 0.0f;
|
|
|
|
for (int n = inlinesptr, ptru = uptr; n < inlinesptr + Constants.TerrainPatchSize; n++, ptru++)
|
|
{
|
|
total += linein[n]*CosineTable16[ptru];
|
|
}
|
|
|
|
// lineout[CopyMatrix16[Constants.TerrainPatchSize * u + column]] = (int)(total * oosob * QuantizeTable16[Constants.TerrainPatchSize * u + column]);
|
|
lineout[CopyMatrix16[uptr + column]] = (int) (total*QuantizeTable16[uptr + column]);
|
|
}
|
|
}
|
|
|
|
private static int DCTColumn16Wbits(float[] linein, int[] lineout, int column, int wbits, int maxwbits)
|
|
{
|
|
// input columns are in fact stored in lines now
|
|
|
|
bool dowbits = wbits != maxwbits;
|
|
int wbitsMaxValue = 1 << wbits;
|
|
|
|
float total = 0.0f;
|
|
// const float oosob = 2.0f / Constants.TerrainPatchSize;
|
|
int inlinesptr = Constants.TerrainPatchSize*column;
|
|
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
total += linein[inlinesptr + n];
|
|
}
|
|
|
|
// lineout[CopyMatrix16[column]] = (int)(OO_SQRT2 * total * oosob * QuantizeTable16[column]);
|
|
int tmp = (int) (OO_SQRT2*total*QuantizeTable16[column]);
|
|
lineout[CopyMatrix16[column]] = tmp;
|
|
|
|
if (dowbits)
|
|
{
|
|
if (tmp < 0) tmp *= -1;
|
|
while (tmp > wbitsMaxValue)
|
|
{
|
|
wbits++;
|
|
wbitsMaxValue = 1 << wbits;
|
|
if (wbits == maxwbits)
|
|
{
|
|
dowbits = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (int uptr = Constants.TerrainPatchSize;
|
|
uptr < Constants.TerrainPatchSize*Constants.TerrainPatchSize;
|
|
uptr += Constants.TerrainPatchSize)
|
|
{
|
|
total = 0.0f;
|
|
|
|
for (int n = inlinesptr, ptru = uptr; n < inlinesptr + Constants.TerrainPatchSize; n++, ptru++)
|
|
{
|
|
total += linein[n]*CosineTable16[ptru];
|
|
}
|
|
|
|
tmp = (int) (total*QuantizeTable16[uptr + column]);
|
|
lineout[CopyMatrix16[uptr + column]] = tmp;
|
|
|
|
if (dowbits)
|
|
{
|
|
if (tmp < 0) tmp *= -1;
|
|
while (tmp > wbitsMaxValue)
|
|
{
|
|
wbits++;
|
|
wbitsMaxValue = 1 << wbits;
|
|
if (wbits == maxwbits)
|
|
{
|
|
dowbits = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return wbits;
|
|
}
|
|
|
|
public static void DecodePatch(int[] patches, BitPack bitpack, TerrainPatch.Header header, int size)
|
|
{
|
|
for (int n = 0; n < size*size; n++)
|
|
{
|
|
// ?
|
|
int 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 static void EncodePatch(BitPack output, int[] patch, int postquant, int wbits)
|
|
{
|
|
int maxwbitssize = (1 << wbits) - 1;
|
|
|
|
if (postquant > Constants.TerrainPatchSize*Constants.TerrainPatchSize || postquant < 0)
|
|
{
|
|
Logger.Log("Postquant is outside the range of allowed values in EncodePatch()", Helpers.LogLevel.Error);
|
|
return;
|
|
}
|
|
|
|
if (postquant != 0) patch[Constants.TerrainPatchSize*Constants.TerrainPatchSize - postquant] = 0;
|
|
|
|
for (int i = 0; i < Constants.TerrainPatchSize*Constants.TerrainPatchSize; i++)
|
|
{
|
|
int temp = patch[i];
|
|
|
|
if (temp == 0)
|
|
{
|
|
bool eob = true;
|
|
|
|
for (int j = i; j < Constants.TerrainPatchSize*Constants.TerrainPatchSize - postquant; j++)
|
|
{
|
|
if (patch[j] != 0)
|
|
{
|
|
eob = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (eob)
|
|
{
|
|
output.PackBits(ZERO_EOB, 2);
|
|
return;
|
|
}
|
|
output.PackBits(ZERO_CODE, 1);
|
|
}
|
|
else
|
|
{
|
|
if (temp < 0)
|
|
{
|
|
temp *= -1;
|
|
|
|
if (temp > maxwbitssize) temp = maxwbitssize;
|
|
|
|
output.PackBits(NEGATIVE_VALUE, 3);
|
|
output.PackBits(temp, wbits);
|
|
}
|
|
else
|
|
{
|
|
if (temp > maxwbitssize) temp = maxwbitssize;
|
|
|
|
output.PackBits(POSITIVE_VALUE, 3);
|
|
output.PackBits(temp, wbits);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public static float[] DecompressPatch(int[] patches, TerrainPatch.Header header, TerrainPatch.GroupHeader group)
|
|
{
|
|
float[] block = new float[group.PatchSize*group.PatchSize];
|
|
float[] output = new float[group.PatchSize*group.PatchSize];
|
|
int prequant = (header.QuantWBits >> 4) + 2;
|
|
int quantize = 1 << prequant;
|
|
float ooq = 1.0f/quantize;
|
|
float mult = ooq*header.Range;
|
|
float addval = mult*(1 << (prequant - 1)) + header.DCOffset;
|
|
|
|
if (group.PatchSize == Constants.TerrainPatchSize)
|
|
{
|
|
for (int n = 0; n < Constants.TerrainPatchSize*Constants.TerrainPatchSize; n++)
|
|
{
|
|
block[n] = patches[CopyMatrix16[n]]*DequantizeTable16[n];
|
|
}
|
|
|
|
float[] ftemp = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
IDCTColumn16(block, ftemp, o);
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
IDCTLine16(ftemp, block, o);
|
|
}
|
|
else
|
|
{
|
|
for (int n = 0; n < Constants.TerrainPatchSize*2*Constants.TerrainPatchSize*2; n++)
|
|
{
|
|
block[n] = patches[CopyMatrix32[n]]*DequantizeTable32[n];
|
|
}
|
|
|
|
Logger.Log("Implement IDCTPatchLarge", Helpers.LogLevel.Error);
|
|
}
|
|
|
|
for (int j = 0; j < block.Length; j++)
|
|
{
|
|
output[j] = block[j]*mult + addval;
|
|
}
|
|
|
|
return output;
|
|
}
|
|
|
|
private static int[] CompressPatch(float[] patchData, TerrainPatch.Header header, int prequant, out int wbits)
|
|
{
|
|
float[] block = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
int wordsize = (prequant - 2) & 0x0f;
|
|
float oozrange = 1.0f/header.Range;
|
|
float range = (1 << prequant);
|
|
float premult = oozrange*range;
|
|
float sub = (1 << (prequant - 1)) + header.DCOffset*premult;
|
|
|
|
header.QuantWBits = wordsize;
|
|
header.QuantWBits |= wordsize << 4;
|
|
|
|
int k = 0;
|
|
for (int j = 0; j < Constants.TerrainPatchSize; j++)
|
|
{
|
|
for (int i = 0; i < Constants.TerrainPatchSize; i++)
|
|
block[k++] = patchData[j*Constants.TerrainPatchSize + i]*premult - sub;
|
|
}
|
|
|
|
float[] ftemp = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
int[] itemp = new int[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
|
|
int maxWbits = prequant + 5;
|
|
wbits = (prequant >> 1);
|
|
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
DCTLine16(block, ftemp, o);
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
wbits = DCTColumn16Wbits(ftemp, itemp, o, wbits, maxWbits);
|
|
|
|
return itemp;
|
|
}
|
|
|
|
private static int[] CompressPatch(float[,] patchData, TerrainPatch.Header header, int prequant, out int wbits)
|
|
{
|
|
float[] block = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
float oozrange = 1.0f/header.Range;
|
|
float range = (1 << prequant);
|
|
float premult = oozrange*range;
|
|
float sub = (1 << (prequant - 1)) + header.DCOffset*premult;
|
|
int wordsize = (prequant - 2) & 0x0f;
|
|
|
|
header.QuantWBits = wordsize;
|
|
header.QuantWBits |= wordsize << 4;
|
|
|
|
int k = 0;
|
|
for (int j = 0; j < Constants.TerrainPatchSize; j++)
|
|
{
|
|
for (int i = 0; i < Constants.TerrainPatchSize; i++)
|
|
block[k++] = patchData[j, i]*premult - sub;
|
|
}
|
|
|
|
float[] ftemp = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
int[] itemp = new int[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
int maxWbits = prequant + 5;
|
|
wbits = (prequant >> 1);
|
|
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
DCTLine16(block, ftemp, o);
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
wbits = DCTColumn16Wbits(ftemp, itemp, o, wbits, maxWbits);
|
|
|
|
return itemp;
|
|
}
|
|
|
|
private static int[] CompressPatch(TerrainData terrData, int patchX, int patchY, TerrainPatch.Header header,
|
|
int prequant, out int wbits)
|
|
{
|
|
float[] block = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
int wordsize = prequant;
|
|
float oozrange = 1.0f/header.Range;
|
|
float range = (1 << prequant);
|
|
float premult = oozrange*range;
|
|
float sub = (1 << (prequant - 1)) + header.DCOffset*premult;
|
|
|
|
header.QuantWBits = wordsize - 2;
|
|
header.QuantWBits |= (prequant - 2) << 4;
|
|
|
|
int k = 0;
|
|
|
|
int yPatchLimit = patchY >= (terrData.SizeY / Constants.TerrainPatchSize) ?
|
|
(terrData.SizeY - Constants.TerrainPatchSize) / Constants.TerrainPatchSize : patchY;
|
|
yPatchLimit = (yPatchLimit + 1) * Constants.TerrainPatchSize;
|
|
|
|
int xPatchLimit = patchX >= (terrData.SizeX / Constants.TerrainPatchSize) ?
|
|
(terrData.SizeX - Constants.TerrainPatchSize) / Constants.TerrainPatchSize : patchX;
|
|
xPatchLimit = (xPatchLimit + 1) * Constants.TerrainPatchSize;
|
|
|
|
for (int yy = patchY * Constants.TerrainPatchSize; yy < yPatchLimit; yy++)
|
|
{
|
|
for (int xx = patchX * Constants.TerrainPatchSize; xx < xPatchLimit; xx++)
|
|
{
|
|
block[k++] = terrData[xx, yy] * premult - sub;
|
|
}
|
|
}
|
|
|
|
float[] ftemp = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
int[] itemp = new int[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
|
|
|
int maxWbits = prequant + 5;
|
|
wbits = (prequant >> 1);
|
|
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
DCTLine16(block, ftemp, o);
|
|
for (int o = 0; o < Constants.TerrainPatchSize; o++)
|
|
wbits = DCTColumn16Wbits(ftemp, itemp, o, wbits, maxWbits);
|
|
|
|
return itemp;
|
|
}
|
|
|
|
#region Initialization
|
|
|
|
private static void BuildDequantizeTable16()
|
|
{
|
|
for (int j = 0; j < Constants.TerrainPatchSize; j++)
|
|
{
|
|
for (int i = 0; i < Constants.TerrainPatchSize; i++)
|
|
{
|
|
DequantizeTable16[j*Constants.TerrainPatchSize + i] = 1.0f + 2.0f*(i + j);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void BuildQuantizeTable16()
|
|
{
|
|
const float oosob = 2.0f/Constants.TerrainPatchSize;
|
|
for (int j = 0; j < Constants.TerrainPatchSize; j++)
|
|
{
|
|
for (int i = 0; i < Constants.TerrainPatchSize; i++)
|
|
{
|
|
// QuantizeTable16[j * Constants.TerrainPatchSize + i] = 1.0f / (1.0f + 2.0f * ((float)i + (float)j));
|
|
QuantizeTable16[j*Constants.TerrainPatchSize + i] = oosob/(1.0f + 2.0f*(i + (float) j));
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void SetupCosines16()
|
|
{
|
|
const float hposz = (float) Math.PI*0.5f/Constants.TerrainPatchSize;
|
|
|
|
for (int u = 0; u < Constants.TerrainPatchSize; u++)
|
|
{
|
|
for (int n = 0; n < Constants.TerrainPatchSize; n++)
|
|
{
|
|
CosineTable16[u*Constants.TerrainPatchSize + n] = (float) Math.Cos((2.0f*n + 1.0f)*u*hposz);
|
|
}
|
|
}
|
|
}
|
|
|
|
private static void BuildCopyMatrix16()
|
|
{
|
|
bool diag = false;
|
|
bool right = true;
|
|
int i = 0;
|
|
int j = 0;
|
|
int count = 0;
|
|
|
|
while (i < Constants.TerrainPatchSize && j < Constants.TerrainPatchSize)
|
|
{
|
|
CopyMatrix16[j*Constants.TerrainPatchSize + i] = count++;
|
|
|
|
if (!diag)
|
|
{
|
|
if (right)
|
|
{
|
|
if (i < Constants.TerrainPatchSize - 1) i++;
|
|
else j++;
|
|
|
|
right = false;
|
|
diag = true;
|
|
}
|
|
else
|
|
{
|
|
if (j < Constants.TerrainPatchSize - 1) j++;
|
|
else i++;
|
|
|
|
right = true;
|
|
diag = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (right)
|
|
{
|
|
i++;
|
|
j--;
|
|
if (i == Constants.TerrainPatchSize - 1 || j == 0) diag = false;
|
|
}
|
|
else
|
|
{
|
|
i--;
|
|
j++;
|
|
if (j == Constants.TerrainPatchSize - 1 || i == 0) diag = false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#endregion Initialization
|
|
}
|
|
}
|