speedup flat terrain patchs encoding, plus a few minor changes.
UbitUmarov
parent
592ba85b0a
commit
63bc0b574f
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@ -248,9 +248,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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header.PatchIDs = (y & 0x1F);
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header.PatchIDs = (y & 0x1F);
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header.PatchIDs += (x << 5);
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header.PatchIDs += (x << 5);
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}
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}
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// NOTE: No idea what prequant and postquant should be or what they do
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int wbits;
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int wbits;
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int[] patch = CompressPatch(patchData, header, 10, out wbits);
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int[] patch = CompressPatch(patchData, header, 10, out wbits);
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wbits = EncodePatchHeader(output, header, patch, Constants.RegionSize, Constants.RegionSize, wbits);
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wbits = EncodePatchHeader(output, header, patch, Constants.RegionSize, Constants.RegionSize, wbits);
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@ -274,8 +272,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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/// <param name="pRegionSizeY"></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 CreatePatchFromHeightmap(BitPack output, TerrainData terrData, int patchX, int patchY)
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{
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{
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TerrainPatch.Header header = PrescanPatch(terrData, patchX, patchY);
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float frange;
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header.QuantWBits = 136;
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TerrainPatch.Header header = PrescanPatch(terrData, patchX, patchY, out frange);
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header.QuantWBits = 130;
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// If larger than legacy region size, pack patch X and Y info differently.
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// If larger than legacy region size, pack patch X and Y info differently.
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if (terrData.SizeX > Constants.RegionSize || terrData.SizeY > Constants.RegionSize)
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if (terrData.SizeX > Constants.RegionSize || terrData.SizeY > Constants.RegionSize)
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@ -289,10 +288,27 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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header.PatchIDs += (patchX << 5);
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header.PatchIDs += (patchX << 5);
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}
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}
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// m_log.DebugFormat("{0} CreatePatchFromHeightmap. patchX={1}, patchY={2}, DCOffset={3}, range={4}",
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if(Math.Round((double)frange,2) == 1.0)
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// LogHeader, patchX, patchY, header.DCOffset, header.Range);
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{
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// flat terrain spead up things
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// NOTE: No idea what prequant and postquant should be or what they do
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// prequant and quant 2 bits both
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header.QuantWBits = 0x00;
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output.PackBits(header.QuantWBits, 8);
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output.PackFloat(header.DCOffset);
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output.PackBits(1, 16);
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if (terrData.SizeX > Constants.RegionSize || terrData.SizeY > Constants.RegionSize)
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output.PackBits(header.PatchIDs, 32);
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else
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output.PackBits(header.PatchIDs, 10);
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// dc term is - max quant value
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output.PackBits(NEGATIVE_VALUE, 3);
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output.PackBits(3, 2);
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// and thats all
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output.PackBits(ZERO_EOB, 2);
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return;
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}
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int wbits;
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int wbits;
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int[] patch = CompressPatch(terrData, patchX, patchY, header, 10, out wbits);
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int[] patch = CompressPatch(terrData, patchX, patchY, header, 10, out wbits);
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wbits = EncodePatchHeader(output, header, patch, (uint)terrData.SizeX, (uint)terrData.SizeY, wbits);
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wbits = EncodePatchHeader(output, header, patch, (uint)terrData.SizeX, (uint)terrData.SizeY, wbits);
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@ -319,15 +335,17 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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}
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}
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// Scan the height info we're returning and return a patch packet header for this patch.
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// Scan the height info we're returning and return a patch packet header for this patch.
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private static TerrainPatch.Header PrescanPatch(TerrainData terrData, int patchX, int patchY)
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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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{
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TerrainPatch.Header header = new TerrainPatch.Header();
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TerrainPatch.Header header = new TerrainPatch.Header();
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float zmax = -99999999.0f;
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float zmax = -99999999.0f;
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float zmin = 99999999.0f;
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float zmin = 99999999.0f;
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int startx = patchX * Constants.TerrainPatchSize;
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int starty = patchY * Constants.TerrainPatchSize;
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for (int j = patchY*Constants.TerrainPatchSize; j < (patchY + 1)*Constants.TerrainPatchSize; j++)
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for (int j = starty; j < starty + Constants.TerrainPatchSize; j++)
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{
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{
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for (int i = patchX*Constants.TerrainPatchSize; i < (patchX + 1)*Constants.TerrainPatchSize; i++)
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for (int i = startx; i < startx + Constants.TerrainPatchSize; i++)
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{
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{
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float val = terrData[i, j];
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float val = terrData[i, j];
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if (val > zmax) zmax = val;
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if (val > zmax) zmax = val;
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@ -336,7 +354,8 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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}
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}
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header.DCOffset = zmin;
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header.DCOffset = zmin;
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header.Range = (int)((zmax - zmin) + 1.0f);
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frange = ((zmax - zmin) + 1.0f);
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header.Range = (int)frange;
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return header;
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return header;
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}
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}
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@ -367,59 +386,12 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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private static int EncodePatchHeader(BitPack output, TerrainPatch.Header header, int[] patch, uint pRegionSizeX,
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private static int EncodePatchHeader(BitPack output, TerrainPatch.Header header, int[] patch, uint pRegionSizeX,
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uint pRegionSizeY, int wbits)
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uint pRegionSizeY, int wbits)
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{
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{
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/*
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int temp;
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int wbits = (header.QuantWBits & 0x0f) + 2;
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uint maxWbits = (uint)wbits + 5;
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uint minWbits = ((uint)wbits >> 1);
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int wbitsMaxValue;
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*/
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// goal is to determ minimum number of bits to use so all data fits
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/*
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wbits = (int)minWbits;
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wbitsMaxValue = (1 << wbits);
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for (int i = 0; i < patch.Length; i++)
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{
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temp = patch[i];
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if (temp != 0)
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{
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// Get the absolute value
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if (temp < 0) temp *= -1;
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no coments..
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for (int j = (int)maxWbits; j > (int)minWbits; j--)
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{
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if ((temp & (1 << j)) != 0)
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{
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if (j > wbits) wbits = j;
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break;
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}
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}
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while (temp > wbitsMaxValue)
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{
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wbits++;
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if (wbits == maxWbits)
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goto Done;
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wbitsMaxValue = 1 << wbits;
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}
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}
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}
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Done:
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// wbits += 1;
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*/
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// better check
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if (wbits > 17)
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if (wbits > 17)
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wbits = 16;
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wbits = 17;
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else if (wbits < 3)
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else if (wbits < 2)
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wbits = 3;
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wbits = 2;
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header.QuantWBits &= 0xf0;
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header.QuantWBits &= 0xf0;
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header.QuantWBits |= (wbits - 2);
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header.QuantWBits |= (wbits - 2);
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output.PackBits(header.QuantWBits, 8);
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output.PackBits(header.QuantWBits, 8);
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@ -467,39 +439,10 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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}
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}
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}
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}
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/*
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private static void DCTLine16(float[] linein, float[] lineout, int line)
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private static void DCTLine16(float[] linein, float[] lineout, int line)
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{
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{
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float total = 0.0f;
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// outputs transpose data
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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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total += linein[lineSize + n];
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}
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lineout[lineSize] = OO_SQRT2 * total;
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int uptr = 0;
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for (int u = 1; u < Constants.TerrainPatchSize; u++)
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{
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total = 0.0f;
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uptr += Constants.TerrainPatchSize;
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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total += linein[lineSize + n] * CosineTable16[uptr + n];
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}
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lineout[lineSize + u] = total;
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}
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}
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*/
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private static void DCTLine16(float[] linein, float[] lineout, int line)
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{
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// outputs transpose data (lines exchanged with coluns )
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// so to save a bit of cpu when doing coluns
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float total = 0.0f;
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float total = 0.0f;
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int lineSize = line*Constants.TerrainPatchSize;
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int lineSize = line*Constants.TerrainPatchSize;
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@ -524,68 +467,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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}
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}
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}
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}
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/*
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private static void DCTColumn16(float[] linein, int[] lineout, int column)
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{
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float total = 0.0f;
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// const float oosob = 2.0f / Constants.TerrainPatchSize;
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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total += linein[Constants.TerrainPatchSize * n + column];
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}
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// lineout[CopyMatrix16[column]] = (int)(OO_SQRT2 * total * oosob * QuantizeTable16[column]);
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lineout[CopyMatrix16[column]] = (int)(OO_SQRT2 * total * QuantizeTable16[column]);
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for (int uptr = Constants.TerrainPatchSize; uptr < Constants.TerrainPatchSize * Constants.TerrainPatchSize; uptr += Constants.TerrainPatchSize)
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{
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total = 0.0f;
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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total += linein[Constants.TerrainPatchSize * n + column] * CosineTable16[uptr + n];
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}
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// lineout[CopyMatrix16[Constants.TerrainPatchSize * u + column]] = (int)(total * oosob * QuantizeTable16[Constants.TerrainPatchSize * u + column]);
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lineout[CopyMatrix16[uptr + column]] = (int)(total * QuantizeTable16[uptr + column]);
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}
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}
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private static void DCTColumn16(float[] linein, int[] lineout, int column)
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{
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// input columns are in fact stored in lines now
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float total = 0.0f;
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// const float oosob = 2.0f / Constants.TerrainPatchSize;
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int inlinesptr = Constants.TerrainPatchSize*column;
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for (int n = 0; n < Constants.TerrainPatchSize; n++)
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{
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total += linein[inlinesptr + n];
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}
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// lineout[CopyMatrix16[column]] = (int)(OO_SQRT2 * total * oosob * QuantizeTable16[column]);
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lineout[CopyMatrix16[column]] = (int) (OO_SQRT2*total*QuantizeTable16[column]);
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for (int uptr = Constants.TerrainPatchSize;
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uptr < Constants.TerrainPatchSize*Constants.TerrainPatchSize;
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uptr += Constants.TerrainPatchSize)
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{
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total = 0.0f;
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for (int n = inlinesptr, ptru = uptr; n < inlinesptr + Constants.TerrainPatchSize; n++, ptru++)
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{
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total += linein[n]*CosineTable16[ptru];
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}
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// lineout[CopyMatrix16[Constants.TerrainPatchSize * u + column]] = (int)(total * oosob * QuantizeTable16[Constants.TerrainPatchSize * u + column]);
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lineout[CopyMatrix16[uptr + column]] = (int) (total*QuantizeTable16[uptr + column]);
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}
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}
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*/
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private static int DCTColumn16Wbits(float[] linein, int[] lineout, int column, int wbits, int maxwbits)
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private static int DCTColumn16Wbits(float[] linein, int[] lineout, int column, int wbits, int maxwbits)
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{
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{
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// input columns are in fact stored in lines now
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// input columns are in fact stored in lines now
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@ -701,16 +582,20 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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private static void EncodePatch(BitPack output, int[] patch, int postquant, int wbits)
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private static void EncodePatch(BitPack output, int[] patch, int postquant, int wbits)
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{
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{
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int maxwbitssize = (1 << wbits) - 1;
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int maxwbitssize = (1 << wbits) - 1;
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int fullSize = Constants.TerrainPatchSize * Constants.TerrainPatchSize;
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if (postquant > Constants.TerrainPatchSize*Constants.TerrainPatchSize || postquant < 0)
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if (postquant > fullSize || postquant < 0)
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{
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{
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Logger.Log("Postquant is outside the range of allowed values in EncodePatch()", Helpers.LogLevel.Error);
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Logger.Log("Postquant is outside the range of allowed values in EncodePatch()", Helpers.LogLevel.Error);
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return;
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return;
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}
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}
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if (postquant != 0) patch[Constants.TerrainPatchSize*Constants.TerrainPatchSize - postquant] = 0;
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if (postquant != 0)
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patch[fullSize - postquant] = 0;
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for (int i = 0; i < Constants.TerrainPatchSize*Constants.TerrainPatchSize; i++)
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int lastZeroindx = fullSize - postquant;
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for (int i = 0; i < fullSize; i++)
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{
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{
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int temp = patch[i];
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int temp = patch[i];
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@ -718,7 +603,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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{
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{
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bool eob = true;
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bool eob = true;
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for (int j = i; j < Constants.TerrainPatchSize*Constants.TerrainPatchSize - postquant; j++)
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for (int j = i; j < lastZeroindx ; j++)
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{
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{
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if (patch[j] != 0)
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if (patch[j] != 0)
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{
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{
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@ -800,13 +685,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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private static int[] CompressPatch(float[] patchData, TerrainPatch.Header header, int prequant, out int wbits)
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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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{
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float[] block = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
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float[] block = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
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int wordsize = (prequant - 2) & 0x0f;
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float oozrange = 1.0f/header.Range;
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float oozrange = 1.0f/header.Range;
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float range = (1 << prequant);
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float range = (1 << prequant);
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float premult = oozrange*range;
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float premult = oozrange*range;
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float sub = (1 << (prequant - 1)) + header.DCOffset*premult;
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float sub = 0.5f * header.Range + header.DCOffset;
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int wordsize = (prequant - 2) & 0x0f;
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header.QuantWBits = wordsize;
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header.QuantWBits = wordsize;
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header.QuantWBits |= wordsize << 4;
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header.QuantWBits |= wordsize << 4;
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@ -814,7 +701,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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for (int j = 0; j < Constants.TerrainPatchSize; j++)
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for (int j = 0; j < Constants.TerrainPatchSize; j++)
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{
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{
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for (int i = 0; i < Constants.TerrainPatchSize; i++)
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for (int i = 0; i < Constants.TerrainPatchSize; i++)
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block[k++] = patchData[j*Constants.TerrainPatchSize + i]*premult - sub;
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block[k++] = (patchData[j*Constants.TerrainPatchSize + i] - 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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float[] ftemp = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
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@ -838,9 +725,10 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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float oozrange = 1.0f/header.Range;
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float oozrange = 1.0f/header.Range;
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float range = (1 << prequant);
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float range = (1 << prequant);
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float premult = oozrange*range;
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float premult = oozrange*range;
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float sub = (1 << (prequant - 1)) + header.DCOffset*premult;
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int wordsize = (prequant - 2) & 0x0f;
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float sub = 0.5f * header.Range + header.DCOffset;
|
||||||
|
|
||||||
|
int wordsize = (prequant - 2) & 0x0f;
|
||||||
header.QuantWBits = wordsize;
|
header.QuantWBits = wordsize;
|
||||||
header.QuantWBits |= wordsize << 4;
|
header.QuantWBits |= wordsize << 4;
|
||||||
|
|
||||||
|
|
@ -848,7 +736,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
|
||||||
for (int j = 0; j < Constants.TerrainPatchSize; j++)
|
for (int j = 0; j < Constants.TerrainPatchSize; j++)
|
||||||
{
|
{
|
||||||
for (int i = 0; i < Constants.TerrainPatchSize; i++)
|
for (int i = 0; i < Constants.TerrainPatchSize; i++)
|
||||||
block[k++] = patchData[j, i]*premult - sub;
|
block[k++] = (patchData[j, i] - sub) * premult;
|
||||||
}
|
}
|
||||||
|
|
||||||
float[] ftemp = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
float[] ftemp = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
||||||
|
|
@ -869,14 +757,16 @@ namespace OpenSim.Region.ClientStack.LindenUDP
|
||||||
int prequant, out int wbits)
|
int prequant, out int wbits)
|
||||||
{
|
{
|
||||||
float[] block = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
float[] block = new float[Constants.TerrainPatchSize*Constants.TerrainPatchSize];
|
||||||
int wordsize = prequant;
|
|
||||||
float oozrange = 1.0f/header.Range;
|
float oozrange = 1.0f/header.Range;
|
||||||
float range = (1 << prequant);
|
float invprequat = (1 << prequant);
|
||||||
float premult = oozrange*range;
|
float premult = oozrange* invprequat;
|
||||||
float sub = (1 << (prequant - 1)) + header.DCOffset*premult;
|
|
||||||
|
|
||||||
header.QuantWBits = wordsize - 2;
|
float sub = 0.5f * header.Range + header.DCOffset;
|
||||||
header.QuantWBits |= (prequant - 2) << 4;
|
|
||||||
|
int wordsize = (prequant -2 ) & 0x0f;
|
||||||
|
header.QuantWBits = wordsize;
|
||||||
|
header.QuantWBits |= wordsize << 4;
|
||||||
|
|
||||||
int k = 0;
|
int k = 0;
|
||||||
|
|
||||||
|
|
@ -892,7 +782,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
|
||||||
{
|
{
|
||||||
for (int xx = patchX * Constants.TerrainPatchSize; xx < xPatchLimit; xx++)
|
for (int xx = patchX * Constants.TerrainPatchSize; xx < xPatchLimit; xx++)
|
||||||
{
|
{
|
||||||
block[k++] = terrData[xx, yy] * premult - sub;
|
block[k++] = (terrData[xx, yy] - sub) * premult;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
@ -930,7 +820,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
|
||||||
{
|
{
|
||||||
for (int i = 0; i < Constants.TerrainPatchSize; i++)
|
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));
|
QuantizeTable16[j*Constants.TerrainPatchSize + i] = oosob/(1.0f + 2.0f*(i + (float) j));
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue