internal override uint ParseData(SwappableBinaryReader br, ILogger logger, uint length, TransferSyntax transferSyntax)
{
//Sometimes there's 0-length ATs...
uint readCount = length;
if (readCount >= 2)
{
encapgroup = br.ReadUInt16();
readCount -= 2;
}
else
{
encapgroup = 0;
}
if (readCount >= 2)
{
encapelem = br.ReadUInt16();
readCount -= 2;
}
else
{
encapelem = 0;
}
br.ReadBytes((int)readCount);
return(length);
}
internal override uint ParseData(SwappableBinaryReader br, ILogger logger, uint length, TransferSyntax transferSyntax)
{
if (length < 8)
{
data = 0;
br.ReadBytes((int)length);
}
else
{
data = br.ReadDouble();
if (length > 8)
{
br.ReadBytes((int)length - 8);
}
}
return(length);
}
internal uint ParseStream(SwappableBinaryReader br, ILogger logger, TransferSyntax transferSyntax, uint length, bool encapImage)
{
IsEncapsulatedImage = encapImage;
if (encapImage && length != 0xFFFFFFFF)
{
//Encapsulated Image with explicit length!
EncapsulatedImageData = br.ReadBytes((int)length);
//Any way to figure out if we need to MSB-swap this? (i.e. is it an OW or an OB? Does that come from the parent element?)
return(length);
}
bool done = false;
uint count = 0;
while (!done)
{
//Check if we're past the end yet
if (length != 0xFFFFFFFF && count >= length)
{
done = true;
continue;
}
long readPosition = br.BaseStream.Position;
//Read in group/element info
ushort group = br.ReadUInt16();
ushort elem = br.ReadUInt16();
count += 4;
//Make element
uint outLen;
DICOMElement nelem = DICOMElement.Parse(group, elem, logger, transferSyntax, br, this, false, out outLen);
//Store reading position in case it's useful later
nelem.ReadPosition = readPosition;
count += outLen;
//Was that the end-of-sequence item?
if (group == 0xFFFE && elem == 0xE00D)
{
done = true;
}
else
{
ElementsLookup[nelem.Tag] = nelem;
Elements.Add(nelem);
}
}
return(count);
}
internal override uint ParseData(SwappableBinaryReader br, ILogger logger, uint length, TransferSyntax transferSyntax)
{
if (length < 2)
{
//busted...
data = (ushort)0;
br.ReadBytes((int)length);
}
else if (length == 2)
{
data = br.ReadUInt16();
}
else if (length > 2)
{
uint readBytes = 0;
DataDictionaryElement elemCheck = DataDictionary.LookupElement(this.Tag);
if (elemCheck == null || elemCheck.VMMax > 1)
{
//Unknown VM or VM goes to > 1
data = new ushort[length / 2];
for (int i = 0; i < length / 2; i++)
{
((ushort[])data)[i] = br.ReadUInt16();
}
readBytes = (length / 2) * 2;
}
else
{
//VM of 1 -- force to single data point
data = br.ReadUInt16();
readBytes = 2;
}
if (length - readBytes > 0)
{
br.ReadBytes((int)(length - readBytes));
}
}
return(length);
}
internal void ParsePacket(SwappableBinaryReader dataSource, int itemLength)
{
long startOffset = dataSource.BaseStream.Position;
ContextID = dataSource.ReadByte();
byte reserved = dataSource.ReadByte();
Result = (PresentationResult)dataSource.ReadByte();
reserved = dataSource.ReadByte();
while (dataSource.BaseStream.Position - startOffset < itemLength)
{
//read sub-item
byte subItemType = dataSource.ReadByte();
byte subItemReserved = dataSource.ReadByte();
ushort subItemLength = dataSource.ReadUInt16();
if (subItemType == 0x30)
{
string rawSyntax = Uid.UidRawToString(dataSource.ReadBytes(subItemLength));
AbstractSyntaxSpecified = AbstractSyntaxes.Lookup(rawSyntax);
}
else if (subItemType == 0x40)
{
string rawSyntax = Uid.UidRawToString(dataSource.ReadBytes(subItemLength));
TransferSyntax syntax = TransferSyntaxes.Lookup(rawSyntax);
if (syntax != null)
{
TransferSyntaxesProposed.Add(syntax);
}
}
else
{
//no idea what it is, or we don't care
dataSource.ReadBytes(itemLength);
}
}
}
internal override uint ParseData(SwappableBinaryReader br, ILogger logger, uint length, TransferSyntax transferSyntax)
{
//reuse setter
Data = System.Text.Encoding.ASCII.GetString(br.ReadBytes((int)length));
return(length);
}
internal override uint ParseData(SwappableBinaryReader br, ILogger logger, uint length, TransferSyntax transferSyntax)
{
//Covered by PS 3.5, Chapter 7.5 (pg. 42-45)
bool encapImage = (Tag == DICOMTags.PixelData);
bool done = false;
uint count = 0;
while (!done)
{
//If explicit length, see if we're done
if (length != 0xFFFFFFFF && count >= length)
{
done = true;
continue;
}
ushort grp = br.ReadUInt16();
ushort elem = br.ReadUInt16();
uint len = br.ReadUInt32();
count += 8;
//Sometimes there's retarded files that are msb swapped inside of sequences outside of the transfer syntax
bool needMoreSwap = (grp == 0xFEFF);
if (needMoreSwap)
{
//Swap the reader for now, then swap back after the sqitem
br.ToggleSwapped();
//still have to swap the stuff we've already read by hand tho
grp = MSBSwapper.SwapW(grp);
elem = MSBSwapper.SwapW(elem);
len = MSBSwapper.SwapDW(len);
}
if (grp == 0xFFFE && elem == 0xE000)
{
//Normal element, parse it out.
SQItem item = new SQItem(this);
count += item.ParseStream(br, logger, transferSyntax, len, encapImage);
Items.Add(item);
}
else if (grp == 0xFFFE && elem == 0xE0DD)
{
//End element
//In case there's garbage in there, read the length bytes
br.ReadBytes((int)len);
count += len;
done = true;
}
else
{
throw new NotImplementedException();
}
//toggle back in case it's just one SQItem that's hosed
if (needMoreSwap)
{
br.ToggleSwapped();
}
}
return(count);
}