本文整理汇总了C#中BitStream.GetBit方法的典型用法代码示例。如果您正苦于以下问题：C# BitStream.GetBit方法的具体用法？C# BitStream.GetBit怎么用？C# BitStream.GetBit使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BitStream的用法示例。
在下文中一共展示了BitStream.GetBit方法的7个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: SmallHuffmanTree
public SmallHuffmanTree(BitStream bs)
{
_bs = bs;
uint bit = _bs.GetBit();
Debug.Assert(bit != 0);
for (ushort i = 0; i < 256; ++i)
_prefixtree[i] = _prefixlength[i] = 0;
DecodeTree(0, 0);
bit = _bs.GetBit();
Debug.Assert(bit == 0);
}示例2: BigHuffmanTree
public BigHuffmanTree(BitStream bs, int allocSize)
{
_bs = bs;
uint bit = _bs.GetBit();
if (bit == 0)
{
_tree = new uint[1];
_tree[0] = 0;
_last[0] = _last[1] = _last[2] = 0;
return;
}
for (uint i = 0; i < 256; ++i)
_prefixtree[i] = _prefixlength[i] = 0;
_loBytes = new SmallHuffmanTree(_bs);
_hiBytes = new SmallHuffmanTree(_bs);
_markers[0] = _bs.GetBits(16);
_markers[1] = _bs.GetBits(16);
_markers[2] = _bs.GetBits(16);
_last[0] = _last[1] = _last[2] = 0xffffffff;
_treeSize = 0;
_tree = new uint[allocSize / 4];
DecodeTree(0, 0);
bit = _bs.GetBit();
Debug.Assert(bit == 0);
for (uint i = 0; i < 3; ++i)
{
if (_last[i] == 0xffffffff)
{
_last[i] = _treeSize;
_tree[_treeSize++] = 0;
}
}
}示例3: GetCode
public ushort GetCode(BitStream bs)
{
byte peek = (byte)bs.PeekBits(Math.Min(bs.Size - bs.Position, 8));
int p = _prefixtree[peek];
bs.Skip(_prefixlength[peek]);
while ((_tree[p] & SMK_NODE) != 0)
{
if (bs.GetBit() != 0)
p += (_tree[p] & ~SMK_NODE);
p++;
}
return _tree[p];
}示例4: DecodeFrame
public void DecodeFrame(BitStream bs)
{
_mMapTree.Reset();
_mClrTree.Reset();
_fullTree.Reset();
_typeTree.Reset();
// Height needs to be doubled if we have flags (Y-interlaced or Y-doubled)
uint doubleY = (uint)(_flags != 0 ? 2 : 1);
uint bw = (uint)(Width / 4);
uint bh = Height / doubleY / 4;
int stride = Width;
uint block = 0, blocks = bw * bh;
uint type, run, j, mode;
uint p1, p2, clr, map;
byte hi, lo;
uint i;
int bOut;
byte[] pixels = _surface.Pixels;
while (block < blocks)
{
type = _typeTree.GetCode(bs);
run = GetBlockRun((int) ((type >> 2) & 0x3f));
switch (type & 3)
{
case SmkBlockMono:
while (run-- != 0 && block < blocks)
{
clr = _mClrTree.GetCode(bs);
map = _mMapTree.GetCode(bs);
bOut = (int)((block / bw) * (stride * 4 * doubleY) + (block % bw) * 4);
hi = (byte)(clr >> 8);
lo = (byte)(clr & 0xff);
for (i = 0; i < 4; i++)
{
for (j = 0; j < doubleY; j++)
{
pixels[bOut] = (map & 1) != 0 ? hi : lo;
pixels[bOut + 1] = (map & 2) != 0 ? hi : lo;
pixels[bOut + 2] = (map & 4) != 0 ? hi : lo;
pixels[bOut + 3] = (map & 8) != 0 ? hi : lo;
bOut += stride;
}
map >>= 4;
}
++block;
}
break;
case SmkBlockFull:
// Smacker v2 has one mode, Smacker v4 has three
if (_signature == ScummHelper.MakeTag('S', 'M', 'K', '2'))
{
mode = 0;
}
else
{
// 00 - mode 0
// 10 - mode 1
// 01 - mode 2
mode = 0;
if (bs.GetBit() != 0)
{
mode = 1;
}
else if (bs.GetBit() != 0)
{
mode = 2;
}
}
while (run-- != 0 && block < blocks)
{
bOut = (int)((block / bw) * (stride * 4 * doubleY) + (block % bw) * 4);
switch (mode)
{
case 0:
for (i = 0; i < 4; ++i)
{
p1 = _fullTree.GetCode(bs);
p2 = _fullTree.GetCode(bs);
for (j = 0; j < doubleY; ++j)
{
pixels[bOut + 2] = (byte)(p1 & 0xff);
pixels[bOut + 3] = (byte)(p1 >> 8);
pixels[bOut + 0] = (byte)(p2 & 0xff);
pixels[bOut + 1] = (byte)(p2 >> 8);
bOut += stride;
}
}
break;
case 1:
p1 = _fullTree.GetCode(bs);
pixels[bOut + 0] = pixels[bOut + 1] = (byte)(p1 & 0xFF);
pixels[bOut + 2] = pixels[bOut + 3] = (byte)(p1 >> 8);
bOut += stride;
pixels[bOut + 0] = pixels[bOut + 1] = (byte)(p1 & 0xFF);
//.........这里部分代码省略.........
示例5: GetCode
public uint GetCode(BitStream bs)
{
byte peek = (byte)bs.PeekBits(Math.Min(bs.Size - bs.Position, 8));
var p = _prefixtree[peek];
bs.Skip(_prefixlength[peek]);
while ((_tree[p] & SMK_NODE) != 0)
{
if (bs.GetBit() != 0)
p += _tree[p] & ~SMK_NODE;
p++;
}
uint v = _tree[p];
if (v != _tree[_last[0]])
{
_tree[_last[2]] = _tree[_last[1]];
_tree[_last[1]] = _tree[_last[0]];
_tree[_last[0]] = v;
}
return v;
}示例6: ReadDC
private int ReadDC(BitStream bits, ushort version, PlaneType plane)
{
// Version 2 just has its coefficient as 10-bits
if (version == 2)
return ReadSignedCoefficient(bits);
// Version 3 has it stored as huffman codes as a difference from the previous DC value
var huffman = (plane == PlaneType.Y) ? _dcHuffmanLuma : _dcHuffmanChroma;
uint symbol = huffman.GetSymbol(bits);
int dc = 0;
if (GET_DC_BITS(symbol) != 0)
{
bool negative = (bits.GetBit() == 0);
dc = (int)bits.GetBits(GET_DC_BITS(symbol) - 1);
if (negative)
dc -= GET_DC_NEG(symbol);
else
dc += GET_DC_POS(symbol);
}
_lastDC[(int)plane] += dc * 4; // convert from 8-bit to 10-bit
return _lastDC[(int)plane];
}示例7: ReadAC
private void ReadAC(BitStream bits, int[] block, int offset)
{
// Clear the block first
for (int i = 0; i < 63; i++)
block[offset + i] = 0;
int count = 0;
int b = offset;
while (!bits.IsEndOfStream)
{
uint symbol = _acHuffman.GetSymbol(bits);
if (symbol == ESCAPE_CODE)
{
// The escape code!
int zeroes = (int)bits.GetBits(6);
count += zeroes + 1;
BLOCK_OVERFLOW_CHECK(count);
b += zeroes;
block[b++] = ReadSignedCoefficient(bits);
}
else if (symbol == END_OF_BLOCK)
{
// We're done
break;
}
else {
// Normal huffman code
int zeroes = GET_AC_ZERO_RUN(symbol);
count += zeroes + 1;
BLOCK_OVERFLOW_CHECK(count);
b += zeroes;
if (bits.GetBit() != 0)
block[b++] = -GET_AC_COEFFICIENT(symbol);
else
block[b++] = GET_AC_COEFFICIENT(symbol);
}
}
}