public virtual void CloseCodec()
{
_ycodec = _crcodec = _cbcodec = null;
_cslice = _cbytes = _cserial = 0;
GC.Collect();
}
public virtual void CloseCodec()
{
_ycodec = _crcodec = _cbcodec = null;
_cslice = _cbytes = _cserial = 0;
GC.Collect();
}
public virtual void Decode(BinaryReader bs)
{
if (_ycodec == null)
{
_cslice = _cserial = 0;
_ymap = null;
}
byte serial = bs.ReadByte();
if (serial != _cserial)
{
throw new IOException("Chunk does not bear expected serial number");
}
int nslices = _cslice + bs.ReadByte();
if (_cserial == 0)
{
int major = bs.ReadByte();
int minor = bs.ReadByte();
if ((major & 0x7f) != 1)
{
throw new IOException("File has been compressed with an incompatible Codec");
}
if (minor > 2)
{
throw new IOException("File has been compressed with a more recent Codec");
}
int header3size = 5;
if (minor < 2)
{
header3size = 4;
}
int w = (bs.ReadByte() << 8);
w |= bs.ReadByte();
int h = (bs.ReadByte() << 8);
h |= bs.ReadByte();
_crcbDelay = 0;
_crcbHalf = false;
int b = bs.ReadByte();
if (minor >= 2)
{
_crcbDelay = 0x7f & b;
}
if (minor >= 2)
{
_crcbHalf = ((0x80 & b) == 0);
}
if ((major & 0x80) != 0)
{
_crcbDelay = -1;
}
_ymap = new IWMap().Init(w, h);
_ycodec = new IWCodec().Init(_ymap);
if (_crcbDelay >= 0)
{
_cbmap = new IWMap().Init(w, h);
_crmap = new IWMap().Init(w, h);
_cbcodec = new IWCodec().Init(_cbmap);
_crcodec = new IWCodec().Init(_crmap);
}
}
ZPCodec zp = new ZPCodec().Init(bs.BaseStream);
for (int flag = 1; (flag != 0) && (_cslice < nslices); _cslice++)
{
flag = _ycodec.CodeSlice(zp);
if ((_crcodec != null) && (_cbcodec != null) && (_crcbDelay <= _cslice))
{
flag |= _cbcodec.CodeSlice(zp);
flag |= _crcodec.CodeSlice(zp);
}
}
_cserial++;
// return nslices;
}
public virtual void Decode(BinaryReader bs)
{
if (_ycodec == null)
{
_cslice = _cserial = 0;
_ymap = null;
}
byte serial = bs.ReadByte();
if (serial != _cserial)
{
throw new IOException("Chunk does not bear expected serial number");
}
int nslices = _cslice + bs.ReadByte();
if (_cserial == 0)
{
int major = bs.ReadByte();
int minor = bs.ReadByte();
if ((major & 0x7f) != 1)
{
throw new IOException("File has been compressed with an incompatible Codec");
}
if (minor > 2)
{
throw new IOException("File has been compressed with a more recent Codec");
}
int header3size = 5;
if (minor < 2)
{
header3size = 4;
}
int w = (bs.ReadByte() << 8);
w |= bs.ReadByte();
int h = (bs.ReadByte() << 8);
h |= bs.ReadByte();
_crcbDelay = 0;
_crcbHalf = false;
int b = bs.ReadByte();
if (minor >= 2)
{
_crcbDelay = 0x7f & b;
}
if (minor >= 2)
{
_crcbHalf = ((0x80 & b) == 0);
}
if ((major & 0x80) != 0)
{
_crcbDelay = -1;
}
_ymap = new IWMap().Init(w, h);
_ycodec = new IWCodec().Init(_ymap);
if (_crcbDelay >= 0)
{
_cbmap = new IWMap().Init(w, h);
_crmap = new IWMap().Init(w, h);
_cbcodec = new IWCodec().Init(_cbmap);
_crcodec = new IWCodec().Init(_crmap);
}
}
ZPCodec zp = new ZPCodec().Init(bs.BaseStream);
for (int flag = 1; (flag != 0) && (_cslice < nslices); _cslice++)
{
flag = _ycodec.CodeSlice(zp);
if ((_crcodec != null) && (_cbcodec != null) && (_crcbDelay <= _cslice))
{
flag |= _cbcodec.CodeSlice(zp);
flag |= _crcodec.CodeSlice(zp);
}
}
_cserial++;
// return nslices;
}
