/// <summary> Retrieve the various boxes from the JP2 file.</summary>
/// <exception cref="ColorSpaceException,">IOException
/// </exception>
protected internal void getBoxes()
{
//byte[] data;
int type;
long len = 0;
int boxStart = 0;
byte[] boxHeader = new byte[16];
int i = 0;
// Search the toplevel boxes for the header box
while (true)
{
in_Renamed.seek(boxStart);
in_Renamed.readFully(boxHeader, 0, 16);
// CONVERSION PROBLEM?
len = (long)CSJ2K.Icc.ICCProfile.getInt(boxHeader, 0);
if (len == 1)
{
len = CSJ2K.Icc.ICCProfile.getLong(boxHeader, 8); // Extended
}
// length
type = CSJ2K.Icc.ICCProfile.getInt(boxHeader, 4);
// Verify the contents of the file so far.
if (i == 0 && type != CSJ2K.j2k.fileformat.FileFormatBoxes.JP2_SIGNATURE_BOX)
{
throw new ColorSpaceException("first box in image not " + "signature");
}
else if (i == 1 && type != CSJ2K.j2k.fileformat.FileFormatBoxes.FILE_TYPE_BOX)
{
throw new ColorSpaceException("second box in image not file");
}
else if (type == CSJ2K.j2k.fileformat.FileFormatBoxes.CONTIGUOUS_CODESTREAM_BOX)
{
throw new ColorSpaceException("header box not found in image");
}
else if (type == CSJ2K.j2k.fileformat.FileFormatBoxes.JP2_HEADER_BOX)
{
break;
}
// Progress to the next box.
++i;
boxStart = (int)(boxStart + len);
}
// boxStart indexes the start of the JP2_HEADER_BOX,
// make headerBoxEnd index the end of the box.
long headerBoxEnd = boxStart + len;
if (len == 1)
{
boxStart += 8; // Extended length header
}
for (boxStart += 8; boxStart < headerBoxEnd; boxStart = (int)(boxStart + len))
{
in_Renamed.seek(boxStart);
in_Renamed.readFully(boxHeader, 0, 16);
len = (long)CSJ2K.Icc.ICCProfile.getInt(boxHeader, 0);
if (len == 1)
{
throw new ColorSpaceException("Extended length boxes " + "not supported");
}
type = (int)CSJ2K.Icc.ICCProfile.getInt(boxHeader, 4);
switch (type)
{
case CSJ2K.j2k.fileformat.FileFormatBoxes.IMAGE_HEADER_BOX:
ihbox = new ImageHeaderBox(in_Renamed, boxStart);
break;
case CSJ2K.j2k.fileformat.FileFormatBoxes.COLOUR_SPECIFICATION_BOX:
csbox = new ColorSpecificationBox(in_Renamed, boxStart);
break;
case CSJ2K.j2k.fileformat.FileFormatBoxes.CHANNEL_DEFINITION_BOX:
cdbox = new ChannelDefinitionBox(in_Renamed, boxStart);
break;
case CSJ2K.j2k.fileformat.FileFormatBoxes.COMPONENT_MAPPING_BOX:
cmbox = new ComponentMappingBox(in_Renamed, boxStart);
break;
case CSJ2K.j2k.fileformat.FileFormatBoxes.PALETTE_BOX:
pbox = new PaletteBox(in_Renamed, boxStart);
break;
default:
break;
}
}
if (ihbox == null)
{
throw new ColorSpaceException("image header box not found");
}
if ((pbox == null && cmbox != null) || (pbox != null && cmbox == null))
{
throw new ColorSpaceException("palette box and component " + "mapping box inconsistency");
}
}
