rearrange source code
UbitUmarov
parent
2b0587770a
commit
e6f675b81b
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@ -65,7 +65,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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private const int NEGATIVE_VALUE = 0x7;
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private static readonly float[] CosineTable16 = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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// private static readonly float[] CosineTable16 = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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private static readonly int[] CopyMatrix16 = new int[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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private static readonly float[] QuantizeTable16 =
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@ -77,7 +77,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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{
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// Initialize the decompression tables
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BuildDequantizeTable16();
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SetupCosines16();
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// SetupCosines16();
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BuildCopyMatrix16();
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BuildQuantizeTable16();
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}
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@ -140,6 +140,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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return header;
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}
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private static int[] CompressPatch(float[] patchData, TerrainPatch.Header header, int prequant, out int wbits)
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{
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float[] block = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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@ -189,7 +190,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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for (int i = 0; i < x.Length; i++)
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{
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CreatePatchFromHeightmap(bitpack, terrData, x[i], y[i]);
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CreatePatchFromTerrainData(bitpack, terrData, x[i], y[i]);
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if (bitpack.BytePos > 1000 && i != x.Length - 1)
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{
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//finish this packet
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@ -219,22 +220,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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return ret;
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}
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/// <summary>
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/// Add a patch of terrain to a BitPacker
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/// </summary>
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/// <param name="output">BitPacker to write the patch to</param>
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/// <param name="heightmap">
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/// Heightmap of the simulator. Presumed to be an sizeX*sizeY array.
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/// </param>
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/// <param name="patchX">
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/// X offset of the patch to create.
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/// </param>
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/// <param name="patchY">
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/// Y offset of the patch to create.
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/// </param>
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/// <param name="pRegionSizeX"></param>
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/// <param name="pRegionSizeY"></param>
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public static void CreatePatchFromHeightmap(BitPack output, TerrainData terrData, int patchX, int patchY)
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public static void CreatePatchFromTerrainData(BitPack output, TerrainData terrData, int patchX, int patchY)
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{
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float frange;
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TerrainPatch.Header header = PrescanPatch(terrData, patchX, patchY, out frange);
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@ -284,8 +270,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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private static TerrainPatch.Header PrescanPatch(TerrainData terrData, int patchX, int patchY, out float frange)
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{
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TerrainPatch.Header header = new TerrainPatch.Header();
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float zmax = -99999999.0f;
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float zmin = 99999999.0f;
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float zmax = float.MinValue;
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float zmin = float.MaxValue;
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int startx = patchX * Constants.TerrainPatchSize;
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int starty = patchY * Constants.TerrainPatchSize;
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@ -306,29 +293,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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return header;
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}
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public static TerrainPatch.Header DecodePatchHeader(BitPack bitpack)
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{
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TerrainPatch.Header header = new TerrainPatch.Header { QuantWBits = bitpack.UnpackBits(8) };
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// Quantized word bits
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if (header.QuantWBits == END_OF_PATCHES)
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return header;
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// DC offset
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header.DCOffset = bitpack.UnpackFloat();
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// Range
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header.Range = bitpack.UnpackBits(16);
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// Patch IDs (10 bits)
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header.PatchIDs = bitpack.UnpackBits(10);
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// Word bits
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header.WordBits = (uint)((header.QuantWBits & 0x0f) + 2);
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return header;
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}
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private static void EncodePatchHeader(BitPack output, TerrainPatch.Header header, int[] patch, bool largeRegion, ref int wbits)
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{
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if (wbits > 17)
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@ -348,85 +312,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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output.PackBits(header.PatchIDs, 10);
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}
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private static void IDCTColumn16(float[] linein, float[] lineout, int column)
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{
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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float total = OO_SQRT2 * linein[column];
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for (int u = 1; u < Constants.TerrainPatchSize; u++)
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{
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int usize = u * Constants.TerrainPatchSize;
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total += linein[usize + column] * CosineTable16[usize + n];
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}
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lineout[Constants.TerrainPatchSize * n + column] = total;
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}
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}
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private static void IDCTLine16(float[] linein, float[] lineout, int line)
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{
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const float oosob = 2.0f / Constants.TerrainPatchSize;
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int lineSize = line * Constants.TerrainPatchSize;
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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float total = OO_SQRT2 * linein[lineSize];
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for (int u = 1; u < Constants.TerrainPatchSize; u++)
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{
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total += linein[lineSize + u] * CosineTable16[u * Constants.TerrainPatchSize + n];
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}
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lineout[lineSize + n] = total * oosob;
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}
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}
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public static void DecodePatch(int[] patches, BitPack bitpack, TerrainPatch.Header header, int size)
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{
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for (int n = 0; n < size * size; n++)
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{
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// ?
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int temp = bitpack.UnpackBits(1);
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if (temp != 0)
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{
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// Value or EOB
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temp = bitpack.UnpackBits(1);
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if (temp != 0)
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{
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// Value
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temp = bitpack.UnpackBits(1);
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if (temp != 0)
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{
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// Negative
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temp = bitpack.UnpackBits((int)header.WordBits);
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patches[n] = temp * -1;
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}
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else
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{
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// Positive
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temp = bitpack.UnpackBits((int)header.WordBits);
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patches[n] = temp;
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}
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}
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else
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{
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// Set the rest to zero
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// TODO: This might not be necessary
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for (int o = n; o < size * size; o++)
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{
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patches[o] = 0;
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}
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break;
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}
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}
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else
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{
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patches[n] = 0;
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}
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}
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}
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private static void EncodePatch(BitPack output, int[] patch, int postquant, int wbits)
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{
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int maxwbitssize = (1 << wbits) - 1;
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@ -493,6 +378,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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int prequant, out int wbits)
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{
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float[] block = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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int[] iout = new int[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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float oozrange = 1.0f / header.Range;
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float invprequat = (1 << prequant);
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@ -505,27 +391,16 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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header.QuantWBits |= wordsize << 4;
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int k = 0;
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int yPatchLimit = patchY >= (terrData.SizeY / Constants.TerrainPatchSize) ?
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(terrData.SizeY - Constants.TerrainPatchSize) / Constants.TerrainPatchSize : patchY;
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yPatchLimit = (yPatchLimit + 1) * Constants.TerrainPatchSize;
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int xPatchLimit = patchX >= (terrData.SizeX / Constants.TerrainPatchSize) ?
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(terrData.SizeX - Constants.TerrainPatchSize) / Constants.TerrainPatchSize : patchX;
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xPatchLimit = (xPatchLimit + 1) * Constants.TerrainPatchSize;
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for (int yy = patchY * Constants.TerrainPatchSize; yy < yPatchLimit; yy++)
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int startX = patchX * Constants.TerrainPatchSize;
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int startY = patchY * Constants.TerrainPatchSize;
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for (int y = startY; y < startY + Constants.TerrainPatchSize; y++)
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{
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for (int xx = patchX * Constants.TerrainPatchSize; xx < xPatchLimit; xx++)
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for (int x = startX; x < startX + Constants.TerrainPatchSize; x++)
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{
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block[k++] = (terrData[xx, yy] - sub) * premult;
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block[k++] = (terrData[x, y] - sub) * premult;
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}
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}
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float[] ftemp = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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int[] iout = new int[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
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wbits = (prequant >> 1);
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dct16x16(block, iout, ref wbits);
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@ -558,19 +433,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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}
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}
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private static void SetupCosines16()
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{
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const float hposz = (float)Math.PI * 0.5f / Constants.TerrainPatchSize;
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for (int u = 0; u < Constants.TerrainPatchSize; u++)
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{
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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CosineTable16[u * Constants.TerrainPatchSize + n] = (float)Math.Cos((2.0f * n + 1.0f) * u * hposz);
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}
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}
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}
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private static void BuildCopyMatrix16()
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{
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bool diag = false;
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@ -622,7 +484,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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#endregion Initialization
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#region DCT
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/* DCT (Discrete Cosine Transform)
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adaptation from
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General Purpose 2D,3D FFT (Fast Fourier Transform) Package
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@ -677,15 +543,14 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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float xr, xi;
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float ftmp;
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int fullSize = Constants.TerrainPatchSize * Constants.TerrainPatchSize;
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int itmp;
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int j, k;
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int indx;
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const int maxwbits = 17; // per header encoding
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bool dowbits = wbits < 17;
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int wbitsMaxValue = 1 << wbits;
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int fullSize = Constants.TerrainPatchSize * Constants.TerrainPatchSize;
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bool dowbits = wbits < 17;
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for (j = 0, k = 0; j < fullSize; j += Constants.TerrainPatchSize, k++)
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{
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@ -1166,7 +1031,132 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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}
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}
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/* not in use, and still not fixed
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#endregion DCT
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#region Decode
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/*
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public static TerrainPatch.Header DecodePatchHeader(BitPack bitpack)
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{
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TerrainPatch.Header header = new TerrainPatch.Header { QuantWBits = bitpack.UnpackBits(8) };
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// Quantized word bits
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if (header.QuantWBits == END_OF_PATCHES)
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return header;
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// DC offset
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header.DCOffset = bitpack.UnpackFloat();
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// Range
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header.Range = bitpack.UnpackBits(16);
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// Patch IDs (10 bits)
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header.PatchIDs = bitpack.UnpackBits(10);
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// Word bits
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header.WordBits = (uint)((header.QuantWBits & 0x0f) + 2);
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return header;
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}
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*/
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/*
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public static void DecodePatch(int[] patches, BitPack bitpack, TerrainPatch.Header header, int size)
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{
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for (int n = 0; n < size * size; n++)
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{
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// ?
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int temp = bitpack.UnpackBits(1);
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if (temp != 0)
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{
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// Value or EOB
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temp = bitpack.UnpackBits(1);
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if (temp != 0)
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{
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// Value
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temp = bitpack.UnpackBits(1);
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if (temp != 0)
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{
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// Negative
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temp = bitpack.UnpackBits((int)header.WordBits);
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patches[n] = temp * -1;
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}
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else
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{
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// Positive
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temp = bitpack.UnpackBits((int)header.WordBits);
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patches[n] = temp;
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}
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}
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else
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{
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// Set the rest to zero
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// TODO: This might not be necessary
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for (int o = n; o < size * size; o++)
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{
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patches[o] = 0;
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}
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break;
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}
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}
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else
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{
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patches[n] = 0;
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}
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}
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}
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*/
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#region IDCT
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/* not in use
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private static void IDCTColumn16(float[] linein, float[] lineout, int column)
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{
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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float total = OO_SQRT2 * linein[column];
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for (int u = 1; u < Constants.TerrainPatchSize; u++)
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{
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int usize = u * Constants.TerrainPatchSize;
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total += linein[usize + column] * CosineTable16[usize + n];
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}
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lineout[Constants.TerrainPatchSize * n + column] = total;
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}
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}
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private static void IDCTLine16(float[] linein, float[] lineout, int line)
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{
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const float oosob = 2.0f / Constants.TerrainPatchSize;
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int lineSize = line * Constants.TerrainPatchSize;
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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float total = OO_SQRT2 * linein[lineSize];
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for (int u = 1; u < Constants.TerrainPatchSize; u++)
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{
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total += linein[lineSize + u] * CosineTable16[u * Constants.TerrainPatchSize + n];
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}
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lineout[lineSize + n] = total * oosob;
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}
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}
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/*
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private static void SetupCosines16()
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{
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const float hposz = (float)Math.PI * 0.5f / Constants.TerrainPatchSize;
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for (int u = 0; u < Constants.TerrainPatchSize; u++)
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{
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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CosineTable16[u * Constants.TerrainPatchSize + n] = (float)Math.Cos((2.0f * n + 1.0f) * u * hposz);
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}
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}
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}
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*/
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//not in use, and still not fixed
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/*
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static void idct16x16(float[] a)
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{
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int j;
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@ -1328,7 +1318,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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}
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}
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*/
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#endregion DCT
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#endregion IDCT
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#endregion Decode
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}
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}
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