public override void LoadRaw()
{
ushort[,] vpred = new ushort[2, 2];
ushort[] hpred = new ushort[2];
ushort csize;
int step = 0;
int huff = 0;
int split = 0;
int row;
RawStream ifp = state.ifp;
ifp.Seek(state.meta_offset, SeekOrigin.Begin);
ushort ver0 = (ushort)ifp.ReadByte();
ushort ver1 = (ushort)ifp.ReadByte();
if (ver0 == 0x49 || ver1 == 0x58)
{
ifp.Seek(2110, SeekOrigin.Current);
}
if (ver0 == 0x46)
{
huff = 2;
}
if (state.tiff_bps == 14)
{
huff += 3;
}
vpred[0, 0] = ifp.get2();
vpred[0, 1] = ifp.get2();
vpred[1, 0] = ifp.get2();
vpred[1, 1] = ifp.get2();
int max = 1 << state.tiff_bps & 0x7fff;
if ((csize = ifp.get2()) > 1)
{
step = max / (csize - 1);
}
if (ver0 == 0x44 && ver1 == 0x20 && step > 0)
{
int i;
for (i = 0; i < csize; i++)
{
state.curve[i * step] = ifp.get2();
}
for (i = 0; i < max; i++)
{
state.curve[i] = (ushort)((state.curve[i - i % step] * (step - i % step) + state.curve[i - i % step + step] * (i % step)) / step);
}
ifp.Seek(state.meta_offset + 562, SeekOrigin.Begin);
split = ifp.get2();
}
else if (ver0 != 0x46 && csize <= 0x4001)
{
max = csize;
ifp.ReadShorts(state.curve, max);
}
int tempIdx = 0;
HuffmanTree htree = new HuffmanTree(nikon_tree[huff], ref tempIdx);
ifp.Seek(state.data_offset, SeekOrigin.Begin);
ifp.ResetBits();
for (row = 0; row < state.height; row++)
{
if (split != 0 && row == split)
{
tempIdx = 0;
htree = new HuffmanTree(nikon_tree[huff], ref tempIdx);
}
for (int col = 0; col < state.raw_width; col++)
{
int leaf = htree.ReadNextSymbolLength(ifp);
int len = leaf & 15;
int shl = leaf >> 4;
int diff = (((int)ifp.GetBits(len - shl) << 1) + 1) << shl >> 1;
if ((diff & (1 << (len - 1))) == 0)
{
diff -= (1 << len) - (shl == 0 ? 1 : 0);
}
if (col < 2)
{
vpred[row & 1, col] = (ushort)(vpred[row & 1, col] + diff);
hpred[col] = vpred[row & 1, col];
}
else
{
hpred[col & 1] = (ushort)(hpred[col & 1] + diff);
}
if (hpred[col & 1] >= max)
{
throw new Exception("derror()");
}
if ((uint)(col - state.left_margin) < state.width)
{
state.BAYER_set(row, col - state.left_margin, state.curve[hpred[col & 1] & 0x3fff]);
}
}
}
}