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rearrange source code

avinationmerge
UbitUmarov 2015-09-25 17:41:50 +01:00
parent 2b0587770a
commit e6f675b81b
1 changed files with 304 additions and 313 deletions
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617
OpenSim/Region/Framework/Scenes/TerrainCompressor.cs
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@ -65,7 +65,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
private const int NEGATIVE_VALUE = 0x7;
private static readonly float[] CosineTable16 = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
// private static readonly float[] CosineTable16 = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
private static readonly int[] CopyMatrix16 = new int[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
private static readonly float[] QuantizeTable16 =
@ -77,7 +77,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
{
// Initialize the decompression tables
BuildDequantizeTable16();
SetupCosines16();
// SetupCosines16();
BuildCopyMatrix16();
BuildQuantizeTable16();
}
@ -140,6 +140,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return header;
}
private static int[] CompressPatch(float[] patchData, TerrainPatch.Header header, int prequant, out int wbits)
{
float[] block = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
@ -189,7 +190,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
for (int i = 0; i < x.Length; i++)
{
CreatePatchFromHeightmap(bitpack, terrData, x[i], y[i]);
CreatePatchFromTerrainData(bitpack, terrData, x[i], y[i]);
if (bitpack.BytePos > 1000 && i != x.Length - 1)
{
//finish this packet
@ -219,22 +220,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return ret;
}
/// <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)
public static void CreatePatchFromTerrainData(BitPack output, TerrainData terrData, int patchX, int patchY)
{
float frange;
TerrainPatch.Header header = PrescanPatch(terrData, patchX, patchY, out frange);
@ -284,8 +270,9 @@ namespace OpenSim.Region.ClientStack.LindenUDP
private static TerrainPatch.Header PrescanPatch(TerrainData terrData, int patchX, int patchY, out float frange)
{
TerrainPatch.Header header = new TerrainPatch.Header();
float zmax = -99999999.0f;
float zmin = 99999999.0f;
float zmax = float.MinValue;
float zmin = float.MaxValue;
int startx = patchX * Constants.TerrainPatchSize;
int starty = patchY * Constants.TerrainPatchSize;
@ -306,29 +293,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
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 void EncodePatchHeader(BitPack output, TerrainPatch.Header header, int[] patch, bool largeRegion, ref int wbits)
{
if (wbits > 17)
@ -348,85 +312,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
output.PackBits(header.PatchIDs, 10);
}
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;
}
}
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;
@ -493,6 +378,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
int prequant, out int wbits)
{
float[] block = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
int[] iout = new int[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
float oozrange = 1.0f / header.Range;
float invprequat = (1 << prequant);
@ -505,27 +391,16 @@ namespace OpenSim.Region.ClientStack.LindenUDP
header.QuantWBits |= wordsize << 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++)
int startX = patchX * Constants.TerrainPatchSize;
int startY = patchY * Constants.TerrainPatchSize;
for (int y = startY; y < startY + Constants.TerrainPatchSize; y++)
{
for (int xx = patchX * Constants.TerrainPatchSize; xx < xPatchLimit; xx++)
for (int x = startX; x < startX + Constants.TerrainPatchSize; x++)
{
block[k++] = (terrData[xx, yy] - sub) * premult;
block[k++] = (terrData[x, y] - sub) * premult;
}
}
float[] ftemp = new float[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
int[] iout = new int[Constants.TerrainPatchSize * Constants.TerrainPatchSize];
wbits = (prequant >> 1);
dct16x16(block, iout, ref wbits);
@ -558,19 +433,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
}
}
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;
@ -622,7 +484,11 @@ namespace OpenSim.Region.ClientStack.LindenUDP
#endregion Initialization
#region DCT
/* DCT (Discrete Cosine Transform)
adaptation from
General Purpose 2D,3D FFT (Fast Fourier Transform) Package
@ -677,15 +543,14 @@ namespace OpenSim.Region.ClientStack.LindenUDP
float xr, xi;
float ftmp;
int fullSize = Constants.TerrainPatchSize * Constants.TerrainPatchSize;
int itmp;
int j, k;
int indx;
const int maxwbits = 17; // per header encoding
bool dowbits = wbits < 17;
int wbitsMaxValue = 1 << wbits;
int fullSize = Constants.TerrainPatchSize * Constants.TerrainPatchSize;
bool dowbits = wbits < 17;
for (j = 0, k = 0; j < fullSize; j += Constants.TerrainPatchSize, k++)
{
@ -1166,169 +1031,295 @@ namespace OpenSim.Region.ClientStack.LindenUDP
}
}
/* not in use, and still not fixed
static void idct16x16(float[] a)
#endregion DCT
#region Decode
/*
public static TerrainPatch.Header DecodePatchHeader(BitPack bitpack)
{
int j;
float x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
float x4r, x4i, x5r, x5i, x6r, x6i, x7r, x7i;
float xr, xi;
TerrainPatch.Header header = new TerrainPatch.Header { QuantWBits = bitpack.UnpackBits(8) };
int fullSize = Constants.TerrainPatchSize * Constants.TerrainPatchSize;
// Quantized word bits
if (header.QuantWBits == END_OF_PATCHES)
return header;
for (j = 0; j < fullSize; j += Constants.TerrainPatchSize)
// DC offset
header.DCOffset = bitpack.UnpackFloat();
// Range
header.Range = bitpack.UnpackBits(16);
// Patch IDs (10 bits)
header.PatchIDs = bitpack.UnpackBits(10);
// Word bits
header.WordBits = (uint)((header.QuantWBits & 0x0f) + 2);
return header;
}
*/
/*
public static void DecodePatch(int[] patches, BitPack bitpack, TerrainPatch.Header header, int size)
{
for (int n = 0; n < size * size; n++)
{
x5r = C16_1R * tmp[1 + j] + C16_1I * tmp[15 + j];
x5i = C16_1R * tmp[15 + j] - C16_1I * tmp[1 + j];
xr = C16_7R * tmp[7 + j] + C16_7I * tmp[9 + j];
xi = C16_7R * tmp[9 + j] - C16_7I * tmp[7 + j];
x4r = x5r + xr;
x4i = x5i - xi;
x5r -= xr;
x5i += xi;
x7r = C16_5R * tmp[5 + j] + C16_5I * tmp[11 + j];
x7i = C16_5R * tmp[11 + j] - C16_5I * tmp[5 + j];
xr = C16_3R * tmp[3 + j] + C16_3I * tmp[13 + j];
xi = C16_3R * tmp[13 + j] - C16_3I * tmp[3 + j];
x6r = x7r + xr;
x6i = x7i - xi;
x7r -= xr;
x7i += xi;
xr = x4r - x6r;
xi = x4i - x6i;
x4r += x6r;
x4i += x6i;
x6r = W16_8R * (xi + xr);
x6i = W16_8R * (xi - xr);
xr = x5r + x7i;
xi = x5i - x7r;
x5r -= x7i;
x5i += x7r;
x7r = W16_4I * x5r + W16_4R * x5i;
x7i = W16_4I * x5i - W16_4R * x5r;
x5r = W16_4R * xr + W16_4I * xi;
x5i = W16_4R * xi - W16_4I * xr;
xr = C16_4R * tmp[4 + j] + C16_4I * tmp[12 + j];
xi = C16_4R * tmp[12 + j] - C16_4I * tmp[4 + j];
x2r = C16_8R * (tmp[0 + j] + tmp[8 + j]);
x3r = C16_8R * (tmp[0 + j] - tmp[8 + j]);
x0r = x2r + xr;
x1r = x3r + xi;
x2r -= xr;
x3r -= xi;
x0i = C16_2R * tmp[2 + j] + C16_2I * tmp[14 + j];
x2i = C16_2R * tmp[14 + j] - C16_2I * tmp[2 + j];
x1i = C16_6R * tmp[6 + j] + C16_6I * tmp[10 + j];
x3i = C16_6R * tmp[10 + j] - C16_6I * tmp[6 + j];
xr = x0i - x1i;
xi = x2i + x3i;
x0i += x1i;
x2i -= x3i;
x1i = W16_8R * (xi + xr);
x3i = W16_8R * (xi - xr);
xr = x0r + x0i;
xi = x0r - x0i;
tmp[0 + j] = xr + x4r;
tmp[15 + j] = xr - x4r;
tmp[8 + j] = xi + x4i;
tmp[7 + j] = xi - x4i;
xr = x1r + x1i;
xi = x1r - x1i;
tmp[2 + j] = xr + x5r;
tmp[13 + j] = xr - x5r;
tmp[10 + j] = xi + x5i;
tmp[5 + j] = xi - x5i;
xr = x2r + x2i;
xi = x2r - x2i;
tmp[4 + j] = xr + x6r;
tmp[11 + j] = xr - x6r;
tmp[12 + j] = xi + x6i;
tmp[3 + j] = xi - x6i;
xr = x3r + x3i;
xi = x3r - x3i;
tmp[6 + j] = xr + x7r;
tmp[9 + j] = xr - x7r;
tmp[14 + j] = xi + x7i;
tmp[1 + j] = xi - x7i;
}
for (j = 0; j < fullSize; j += Constants.TerrainPatchSize)
{
x5r = C16_1R * tmp[j + 1] + C16_1I * tmp[j + 15];
x5i = C16_1R * tmp[j + 15] - C16_1I * tmp[j + 1];
xr = C16_7R * tmp[j + 7] + C16_7I * tmp[j + 9];
xi = C16_7R * tmp[j + 9] - C16_7I * tmp[j + 7];
x4r = x5r + xr;
x4i = x5i - xi;
x5r -= xr;
x5i += xi;
x7r = C16_5R * tmp[j + 5] + C16_5I * tmp[j + 11];
x7i = C16_5R * tmp[j + 11] - C16_5I * tmp[j + 5];
xr = C16_3R * tmp[j + 3] + C16_3I * tmp[j + 13];
xi = C16_3R * tmp[j + 13] - C16_3I * tmp[j + 3];
x6r = x7r + xr;
x6i = x7i - xi;
x7r -= xr;
x7i += xi;
xr = x4r - x6r;
xi = x4i - x6i;
x4r += x6r;
x4i += x6i;
x6r = W16_8R * (xi + xr);
x6i = W16_8R * (xi - xr);
xr = x5r + x7i;
xi = x5i - x7r;
x5r -= x7i;
x5i += x7r;
x7r = W16_4I * x5r + W16_4R * x5i;
x7i = W16_4I * x5i - W16_4R * x5r;
x5r = W16_4R * xr + W16_4I * xi;
x5i = W16_4R * xi - W16_4I * xr;
xr = C16_4R * tmp[j + 4] + C16_4I * tmp[j + 12];
xi = C16_4R * tmp[j + 12] - C16_4I * tmp[j + 4];
x2r = C16_8R * (tmp[j + 0] + tmp[j + 8]);
x3r = C16_8R * (tmp[j + 0] - tmp[j + 8]);
x0r = x2r + xr;
x1r = x3r + xi;
x2r -= xr;
x3r -= xi;
x0i = C16_2R * tmp[j + 2] + C16_2I * tmp[j + 14];
x2i = C16_2R * tmp[j + 14] - C16_2I * tmp[j + 2];
x1i = C16_6R * tmp[j + 6] + C16_6I * tmp[j + 10];
x3i = C16_6R * tmp[j + 10] - C16_6I * tmp[j + 6];
xr = x0i - x1i;
xi = x2i + x3i;
x0i += x1i;
x2i -= x3i;
x1i = W16_8R * (xi + xr);
x3i = W16_8R * (xi - xr);
xr = x0r + x0i;
xi = x0r - x0i;
tmp[j + 0] = xr + x4r;
tmp[j + 15] = xr - x4r;
tmp[j + 8] = xi + x4i;
tmp[j + 7] = xi - x4i;
xr = x1r + x1i;
xi = x1r - x1i;
tmp[j + 2] = xr + x5r;
tmp[j + 13] = xr - x5r;
tmp[j + 10] = xi + x5i;
tmp[j + 5] = xi - x5i;
xr = x2r + x2i;
xi = x2r - x2i;
tmp[j + 4] = xr + x6r;
tmp[j + 11] = xr - x6r;
tmp[j + 12] = xi + x6i;
tmp[j + 3] = xi - x6i;
xr = x3r + x3i;
xi = x3r - x3i;
tmp[j + 6] = xr + x7r;
tmp[j + 9] = xr - x7r;
tmp[j + 14] = xi + x7i;
tmp[j + 1] = xi - x7i;
// ?
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;
}
}
}
*/
#endregion DCT
*/
#region IDCT
/* not in use
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 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);
}
}
}
*/
//not in use, and still not fixed
/*
static void idct16x16(float[] a)
{
int j;
float x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i;
float x4r, x4i, x5r, x5i, x6r, x6i, x7r, x7i;
float xr, xi;
int fullSize = Constants.TerrainPatchSize * Constants.TerrainPatchSize;
for (j = 0; j < fullSize; j += Constants.TerrainPatchSize)
{
x5r = C16_1R * tmp[1 + j] + C16_1I * tmp[15 + j];
x5i = C16_1R * tmp[15 + j] - C16_1I * tmp[1 + j];
xr = C16_7R * tmp[7 + j] + C16_7I * tmp[9 + j];
xi = C16_7R * tmp[9 + j] - C16_7I * tmp[7 + j];
x4r = x5r + xr;
x4i = x5i - xi;
x5r -= xr;
x5i += xi;
x7r = C16_5R * tmp[5 + j] + C16_5I * tmp[11 + j];
x7i = C16_5R * tmp[11 + j] - C16_5I * tmp[5 + j];
xr = C16_3R * tmp[3 + j] + C16_3I * tmp[13 + j];
xi = C16_3R * tmp[13 + j] - C16_3I * tmp[3 + j];
x6r = x7r + xr;
x6i = x7i - xi;
x7r -= xr;
x7i += xi;
xr = x4r - x6r;
xi = x4i - x6i;
x4r += x6r;
x4i += x6i;
x6r = W16_8R * (xi + xr);
x6i = W16_8R * (xi - xr);
xr = x5r + x7i;
xi = x5i - x7r;
x5r -= x7i;
x5i += x7r;
x7r = W16_4I * x5r + W16_4R * x5i;
x7i = W16_4I * x5i - W16_4R * x5r;
x5r = W16_4R * xr + W16_4I * xi;
x5i = W16_4R * xi - W16_4I * xr;
xr = C16_4R * tmp[4 + j] + C16_4I * tmp[12 + j];
xi = C16_4R * tmp[12 + j] - C16_4I * tmp[4 + j];
x2r = C16_8R * (tmp[0 + j] + tmp[8 + j]);
x3r = C16_8R * (tmp[0 + j] - tmp[8 + j]);
x0r = x2r + xr;
x1r = x3r + xi;
x2r -= xr;
x3r -= xi;
x0i = C16_2R * tmp[2 + j] + C16_2I * tmp[14 + j];
x2i = C16_2R * tmp[14 + j] - C16_2I * tmp[2 + j];
x1i = C16_6R * tmp[6 + j] + C16_6I * tmp[10 + j];
x3i = C16_6R * tmp[10 + j] - C16_6I * tmp[6 + j];
xr = x0i - x1i;
xi = x2i + x3i;
x0i += x1i;
x2i -= x3i;
x1i = W16_8R * (xi + xr);
x3i = W16_8R * (xi - xr);
xr = x0r + x0i;
xi = x0r - x0i;
tmp[0 + j] = xr + x4r;
tmp[15 + j] = xr - x4r;
tmp[8 + j] = xi + x4i;
tmp[7 + j] = xi - x4i;
xr = x1r + x1i;
xi = x1r - x1i;
tmp[2 + j] = xr + x5r;
tmp[13 + j] = xr - x5r;
tmp[10 + j] = xi + x5i;
tmp[5 + j] = xi - x5i;
xr = x2r + x2i;
xi = x2r - x2i;
tmp[4 + j] = xr + x6r;
tmp[11 + j] = xr - x6r;
tmp[12 + j] = xi + x6i;
tmp[3 + j] = xi - x6i;
xr = x3r + x3i;
xi = x3r - x3i;
tmp[6 + j] = xr + x7r;
tmp[9 + j] = xr - x7r;
tmp[14 + j] = xi + x7i;
tmp[1 + j] = xi - x7i;
}
for (j = 0; j < fullSize; j += Constants.TerrainPatchSize)
{
x5r = C16_1R * tmp[j + 1] + C16_1I * tmp[j + 15];
x5i = C16_1R * tmp[j + 15] - C16_1I * tmp[j + 1];
xr = C16_7R * tmp[j + 7] + C16_7I * tmp[j + 9];
xi = C16_7R * tmp[j + 9] - C16_7I * tmp[j + 7];
x4r = x5r + xr;
x4i = x5i - xi;
x5r -= xr;
x5i += xi;
x7r = C16_5R * tmp[j + 5] + C16_5I * tmp[j + 11];
x7i = C16_5R * tmp[j + 11] - C16_5I * tmp[j + 5];
xr = C16_3R * tmp[j + 3] + C16_3I * tmp[j + 13];
xi = C16_3R * tmp[j + 13] - C16_3I * tmp[j + 3];
x6r = x7r + xr;
x6i = x7i - xi;
x7r -= xr;
x7i += xi;
xr = x4r - x6r;
xi = x4i - x6i;
x4r += x6r;
x4i += x6i;
x6r = W16_8R * (xi + xr);
x6i = W16_8R * (xi - xr);
xr = x5r + x7i;
xi = x5i - x7r;
x5r -= x7i;
x5i += x7r;
x7r = W16_4I * x5r + W16_4R * x5i;
x7i = W16_4I * x5i - W16_4R * x5r;
x5r = W16_4R * xr + W16_4I * xi;
x5i = W16_4R * xi - W16_4I * xr;
xr = C16_4R * tmp[j + 4] + C16_4I * tmp[j + 12];
xi = C16_4R * tmp[j + 12] - C16_4I * tmp[j + 4];
x2r = C16_8R * (tmp[j + 0] + tmp[j + 8]);
x3r = C16_8R * (tmp[j + 0] - tmp[j + 8]);
x0r = x2r + xr;
x1r = x3r + xi;
x2r -= xr;
x3r -= xi;
x0i = C16_2R * tmp[j + 2] + C16_2I * tmp[j + 14];
x2i = C16_2R * tmp[j + 14] - C16_2I * tmp[j + 2];
x1i = C16_6R * tmp[j + 6] + C16_6I * tmp[j + 10];
x3i = C16_6R * tmp[j + 10] - C16_6I * tmp[j + 6];
xr = x0i - x1i;
xi = x2i + x3i;
x0i += x1i;
x2i -= x3i;
x1i = W16_8R * (xi + xr);
x3i = W16_8R * (xi - xr);
xr = x0r + x0i;
xi = x0r - x0i;
tmp[j + 0] = xr + x4r;
tmp[j + 15] = xr - x4r;
tmp[j + 8] = xi + x4i;
tmp[j + 7] = xi - x4i;
xr = x1r + x1i;
xi = x1r - x1i;
tmp[j + 2] = xr + x5r;
tmp[j + 13] = xr - x5r;
tmp[j + 10] = xi + x5i;
tmp[j + 5] = xi - x5i;
xr = x2r + x2i;
xi = x2r - x2i;
tmp[j + 4] = xr + x6r;
tmp[j + 11] = xr - x6r;
tmp[j + 12] = xi + x6i;
tmp[j + 3] = xi - x6i;
xr = x3r + x3i;
xi = x3r - x3i;
tmp[j + 6] = xr + x7r;
tmp[j + 9] = xr - x7r;
tmp[j + 14] = xi + x7i;
tmp[j + 1] = xi - x7i;
}
}
*/
#endregion IDCT
#endregion Decode
}
}