public virtual int CalcLength(DcmEncodeParam param)
{
totlen = param.undefSeqLen?8:0;
for (int i = 0, n = vm(); i < n; ++i)
totlen += GetItem(i).CalcLength(param) + (param.undefItemLen?16:8);
return totlen;
}
public virtual int CalcLength(DcmEncodeParam param)
{
totLen = 0;
grCount = 0;
uint curGrTag, prevGrTag = 0;
IEnumerator enu = GetEnumerator();
while( enu.MoveNext() )
{
DcmElement el = (DcmElement) enu.Current;
curGrTag = el.tag() & 0xffff0000;
if (curGrTag != prevGrTag)
{
grCount++;
grTags = EnsureCapacity(grTags, grCount + 1);
grLens = EnsureCapacity(grLens, grCount + 1);
grTags[grCount - 1] = prevGrTag = curGrTag;
grLens[grCount - 1] = 0;
}
grLens[grCount - 1] += (param.explicitVR && !VRs.IsLengthField16Bit(el.vr()))?12:8;
if (el is ValueElement)
grLens[grCount - 1] += el.length();
else if (el is FragmentElement)
grLens[grCount - 1] += ((FragmentElement) el).CalcLength();
else
grLens[grCount - 1] += ((SQElement) el).CalcLength(param);
}
grTags[grCount] = 0;
if (!param.skipGroupLen)
totLen += grCount * 12;
for (int i = 0; i < grCount; ++i)
{
totLen += grLens[i];
}
return totLen;
}
private void DoWrite(DcmHandlerI handler, DcmEncodeParam param)
{
int grIndex = 0;
IEnumerator enu = GetEnumerator();
while( enu.MoveNext() )
{
DcmElement el = (DcmElement) enu.Current;
if (!param.skipGroupLen && grTags[grIndex] == (el.tag() & (int) (- (0x100000000 - 0xffff0000))))
{
byte[] b4 = new byte[4];
ByteBuffer.Wrap(b4, param.byteOrder).Write(grLens[grIndex]);
handler.StartElement( grTags[grIndex], VRs.UL, el.StreamPosition);
handler.Value(b4, 0, 4);
handler.EndElement();
++grIndex;
}
if (el is SQElement)
{
int len = param.undefSeqLen?- 1:el.length();
handler.StartElement(el.tag(), VRs.SQ, el.StreamPosition);
handler.StartSequence(len);
for (int j = 0, m = el.vm(); j < m; )
{
BaseDataset ds = (BaseDataset) el.GetItem(j);
int itemlen = param.undefItemLen?- 1:ds.length();
handler.StartItem(++j, ds.GetItemOffset(), itemlen);
ds.DoWrite(handler, param);
handler.EndItem(itemlen);
}
handler.EndSequence(len);
handler.EndElement();
}
else if (el is FragmentElement)
{
long offset = el.StreamPosition;
handler.StartElement(el.tag(), el.vr(), offset);
handler.StartSequence(- 1);
if (offset != - 1L)
{
offset += 12;
}
for (int j = 0, m = el.vm(); j < m; )
{
ByteBuffer bb = el.GetDataFragment(j, param.byteOrder);
handler.Fragment(++j, offset, bb.ToArray(), (int)bb.Position, bb.length());
if (offset != - 1L)
{
offset += (bb.length() + 9) & (~ 1);
}
}
handler.EndSequence(- 1);
handler.EndElement();
}
else
{
// int len = el.length();
handler.StartElement(el.tag(), el.vr(), el.StreamPosition);
ByteBuffer bb = el.GetByteBuffer(param.byteOrder);
handler.Value(bb);
handler.EndElement();
}
}
}
public virtual void WriteFile(System.IO.Stream outs, DcmEncodeParam param)
{
FileMetaInfo fmi = GetFileMetaInfo();
if (fmi != null)
{
fmi.Write(outs);
if (param == null)
{
param = DcmDecodeParam.ValueOf(fmi.TransferSyntaxUID);
}
}
WriteDataset(outs, param);
}
public virtual void WriteDataset(System.IO.Stream outs, DcmEncodeParam param)
{
if (param == null)
{
param = DcmDecodeParam.IVR_LE;
}
// TODO: Check deflated
WriteDataset(new DcmStreamHandler(outs), param);
}
public virtual void WriteDataset(DcmHandlerI handler, DcmEncodeParam param)
{
if (!(param.skipGroupLen && param.undefItemLen && param.undefSeqLen))
CalcLength(param);
handler.StartDataset();
handler.DcmDecodeParam = param;
DoWrite(handler, param);
handler.EndDataset();
}
public virtual void WriteHeader( Stream os, DcmEncodeParam encParam, uint tag, int vr, int len)
{
if (encParam.byteOrder == ByteOrder.LITTLE_ENDIAN)
{
os.WriteByte((Byte) (tag >> 16));
os.WriteByte((Byte) (tag >> 24));
os.WriteByte((Byte) (tag >> 0));
os.WriteByte((Byte) (tag >> 8));
}
else
{
os.WriteByte((Byte) (tag >> 24));
os.WriteByte((Byte) (tag >> 16));
os.WriteByte((Byte) (tag >> 8));
os.WriteByte((Byte) (tag >> 0));
}
if (encParam.explicitVR)
{
os.WriteByte((Byte) (vr >> 8));
os.WriteByte((Byte) (vr >> 0));
if (VRs.IsLengthField16Bit(vr))
{
if (encParam.byteOrder == ByteOrder.LITTLE_ENDIAN)
{
os.WriteByte((Byte) (len >> 0));
os.WriteByte((Byte) (len >> 8));
}
else
{
os.WriteByte((Byte) (len >> 8));
os.WriteByte((Byte) (len >> 0));
}
return ;
}
else
{
os.WriteByte((Byte) 0);
os.WriteByte((Byte) 0);
}
}
if (encParam.byteOrder == ByteOrder.LITTLE_ENDIAN)
{
os.WriteByte((Byte) (len >> 0));
os.WriteByte((Byte) (len >> 8));
os.WriteByte((Byte) (len >> 16));
os.WriteByte((Byte) (len >> 24));
}
else
{
// order == ByteOrder.BIG_ENDIAN
os.WriteByte((Byte) (len >> 24));
os.WriteByte((Byte) (len >> 16));
os.WriteByte((Byte) (len >> 8));
os.WriteByte((Byte) (len >> 0));
}
}
private void storeToFile(DcmParser parser, Dataset ds, FileInfo file, DcmEncodeParam encParam)
{
Stream outs = openOutputStream(file);
try
{
ds.WriteFile(outs, encParam);
if (parser.ReadTag == Tags.PixelData)
{
ds.WriteHeader(outs, encParam, parser.ReadTag, parser.ReadVR, parser.ReadLength);
copy(parser.InputStream, outs);
}
}
finally
{
try
{
outs.Close();
}
catch (IOException ignore)
{
}
}
}
