corrade-vassal – Rev 1
?pathlinks?
#region Using Statements
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Text;
using CSJ2K;
using CSJ2K.Color;
using CSJ2K.Icc;
using CSJ2K.j2k;
using CSJ2K.j2k.codestream;
using CSJ2K.j2k.codestream.reader;
using CSJ2K.j2k.decoder;
using CSJ2K.j2k.entropy.decoder;
using CSJ2K.j2k.fileformat.reader;
using CSJ2K.j2k.image;
using CSJ2K.j2k.image.invcomptransf;
using CSJ2K.j2k.io;
using CSJ2K.j2k.quantization.dequantizer;
using CSJ2K.j2k.roi;
using CSJ2K.j2k.util;
using CSJ2K.j2k.wavelet.synthesis;
#endregion
namespace CSJ2K
{
public class J2kImage
{
#region Static Decoder Methods
public static Image FromFile(string filename)
{
Stream stream = new FileStream(filename, FileMode.Open, FileAccess.Read);
Image img = FromStream(stream);
stream.Close();
return (img);
}
public static Image FromBytes(byte[] j2kdata)
{
return FromStream(new MemoryStream(j2kdata));
}
public static Image FromStream(Stream stream)
{
RandomAccessIO in_stream = new ISRandomAccessIO(stream);
// Initialize default parameters
ParameterList defpl = GetDefaultParameterList(decoder_pinfo);
// Create parameter list using defaults
ParameterList pl = new ParameterList(defpl);
// **** File Format ****
// If the codestream is wrapped in the jp2 fileformat, Read the
// file format wrapper
FileFormatReader ff = new FileFormatReader(in_stream);
ff.readFileFormat();
if (ff.JP2FFUsed)
{
in_stream.seek(ff.FirstCodeStreamPos);
}
// +----------------------------+
// | Instantiate decoding chain |
// +----------------------------+
// **** Header decoder ****
// Instantiate header decoder and read main header
HeaderInfo hi = new HeaderInfo();
HeaderDecoder hd;
try
{
hd = new HeaderDecoder(in_stream, pl, hi);
}
catch (EndOfStreamException e)
{
throw new ApplicationException("Codestream too short or bad header, unable to decode.", e);
}
int nCompCod = hd.NumComps;
int nTiles = hi.sizValue.NumTiles;
DecoderSpecs decSpec = hd.DecoderSpecs;
// Get demixed bitdepths
int[] depth = new int[nCompCod];
for (int i = 0; i < nCompCod; i++)
{
depth[i] = hd.getOriginalBitDepth(i);
}
// **** Bit stream reader ****
BitstreamReaderAgent breader;
try
{
breader = BitstreamReaderAgent.
createInstance(in_stream, hd, pl, decSpec,
false, hi);
}
catch (IOException e)
{
throw new ApplicationException("Error while reading bit stream header or parsing packets.", e);
}
catch (ArgumentException e)
{
throw new ApplicationException("Cannot instantiate bit stream reader.", e);
}
// **** Entropy decoder ****
EntropyDecoder entdec;
try
{
entdec = hd.createEntropyDecoder(breader, pl);
}
catch (ArgumentException e)
{
throw new ApplicationException("Cannot instantiate entropy decoder.", e);
}
// **** ROI de-scaler ****
ROIDeScaler roids;
try
{
roids = hd.createROIDeScaler(entdec, pl, decSpec);
}
catch (ArgumentException e)
{
throw new ApplicationException("Cannot instantiate roi de-scaler.", e);
}
// **** Dequantizer ****
Dequantizer deq;
try
{
deq = hd.createDequantizer(roids, depth, decSpec);
}
catch (ArgumentException e)
{
throw new ApplicationException("Cannot instantiate dequantizer.", e);
}
// **** Inverse wavelet transform ***
InverseWT invWT;
try
{
// full page inverse wavelet transform
invWT = InverseWT.createInstance(deq, decSpec);
}
catch (ArgumentException e)
{
throw new ApplicationException("Cannot instantiate inverse wavelet transform.", e);
}
int res = breader.ImgRes;
invWT.ImgResLevel = res;
// **** Data converter **** (after inverse transform module)
ImgDataConverter converter = new ImgDataConverter(invWT, 0);
// **** Inverse component transformation ****
InvCompTransf ictransf = new InvCompTransf(converter, decSpec, depth, pl);
// **** Color space mapping ****
BlkImgDataSrc color;
if (ff.JP2FFUsed && pl.getParameter("nocolorspace").Equals("off"))
{
try
{
ColorSpace csMap = new ColorSpace(in_stream, hd, pl);
BlkImgDataSrc channels = hd.createChannelDefinitionMapper(ictransf, csMap);
BlkImgDataSrc resampled = hd.createResampler(channels, csMap);
BlkImgDataSrc palettized = hd.createPalettizedColorSpaceMapper(resampled, csMap);
color = hd.createColorSpaceMapper(palettized, csMap);
}
catch (ArgumentException e)
{
throw new ApplicationException("Could not instantiate ICC profiler.", e);
}
catch (ColorSpaceException e)
{
throw new ApplicationException("Error processing ColorSpace information.", e);
}
}
else
{ // Skip colorspace mapping
color = ictransf;
}
// This is the last image in the decoding chain and should be
// assigned by the last transformation:
BlkImgDataSrc decodedImage = color;
if (color == null)
{
decodedImage = ictransf;
}
int numComps = decodedImage.NumComps;
int bytesPerPixel = numComps; // Assuming 8-bit components
// **** Copy to Bitmap ****
PixelFormat pixelFormat;
switch (numComps)
{
case 1:
pixelFormat = PixelFormat.Format24bppRgb; break;
case 3:
pixelFormat = PixelFormat.Format24bppRgb; break;
case 4:
case 5:
pixelFormat = PixelFormat.Format32bppArgb; break;
default:
throw new ApplicationException("Unsupported PixelFormat. " + numComps + " components.");
}
Bitmap dst = new Bitmap(decodedImage.ImgWidth, decodedImage.ImgHeight, pixelFormat);
Coord numTiles = decodedImage.getNumTiles(null);
int tIdx = 0;
for (int y = 0; y < numTiles.y; y++)
{
// Loop on horizontal tiles
for (int x = 0; x < numTiles.x; x++, tIdx++)
{
decodedImage.setTile(x, y);
int height = decodedImage.getTileCompHeight(tIdx, 0);
int width = decodedImage.getTileCompWidth(tIdx, 0);
int tOffx = decodedImage.getCompULX(0) -
(int)Math.Ceiling(decodedImage.ImgULX /
(double)decodedImage.getCompSubsX(0));
int tOffy = decodedImage.getCompULY(0) -
(int)Math.Ceiling(decodedImage.ImgULY /
(double)decodedImage.getCompSubsY(0));
DataBlkInt[] db = new DataBlkInt[numComps];
int[] ls = new int[numComps];
int[] mv = new int[numComps];
int[] fb = new int[numComps];
for (int i = 0; i < numComps; i++)
{
db[i] = new DataBlkInt();
ls[i] = 1 << (decodedImage.getNomRangeBits(0) - 1);
mv[i] = (1 << decodedImage.getNomRangeBits(0)) - 1;
fb[i] = decodedImage.getFixedPoint(0);
}
for (int l = 0; l < height; l++)
{
for (int i = numComps - 1; i >= 0; i--)
{
db[i].ulx = 0;
db[i].uly = l;
db[i].w = width;
db[i].h = 1;
decodedImage.getInternCompData(db[i], i);
}
int[] k = new int[numComps];
for (int i = numComps - 1; i >= 0; i--) k[i] = db[i].offset + width - 1;
int outputBytesPerPixel = Math.Max(3, Math.Min(4, bytesPerPixel));
byte[] rowvalues = new byte[width * outputBytesPerPixel];
for (int i = width - 1; i >= 0; i--)
{
int[] tmp = new int[numComps];
for (int j = numComps - 1; j >= 0; j--)
{
tmp[j] = (db[j].data_array[k[j]--] >> fb[j]) + ls[j];
tmp[j] = (tmp[j] < 0) ? 0 : ((tmp[j] > mv[j]) ? mv[j] : tmp[j]);
if (decodedImage.getNomRangeBits(j) != 8)
tmp[j] = (int)Math.Round(((double)tmp[j] / Math.Pow(2D, (double)decodedImage.getNomRangeBits(j))) * 255D);
}
int offset = i * outputBytesPerPixel;
switch (numComps)
{
case 1:
rowvalues[offset + 0] = (byte)tmp[0];
rowvalues[offset + 1] = (byte)tmp[0];
rowvalues[offset + 2] = (byte)tmp[0];
break;
case 3:
rowvalues[offset + 0] = (byte)tmp[2];
rowvalues[offset + 1] = (byte)tmp[1];
rowvalues[offset + 2] = (byte)tmp[0];
break;
case 4:
case 5:
rowvalues[offset + 0] = (byte)tmp[2];
rowvalues[offset + 1] = (byte)tmp[1];
rowvalues[offset + 2] = (byte)tmp[0];
rowvalues[offset + 3] = (byte)tmp[3];
break;
}
}
BitmapData dstdata = dst.LockBits(
new System.Drawing.Rectangle(tOffx, tOffy + l, width, 1),
ImageLockMode.WriteOnly, pixelFormat);
IntPtr ptr = dstdata.Scan0;
System.Runtime.InteropServices.Marshal.Copy(rowvalues, 0, ptr, rowvalues.Length);
dst.UnlockBits(dstdata);
}
}
}
return dst;
}
public static List<int> GetLayerBoundaries(Stream stream)
{
RandomAccessIO in_stream = new ISRandomAccessIO(stream);
// Create parameter list using defaults
ParameterList pl = new ParameterList(GetDefaultParameterList(decoder_pinfo));
// **** File Format ****
// If the codestream is wrapped in the jp2 fileformat, Read the
// file format wrapper
FileFormatReader ff = new FileFormatReader(in_stream);
ff.readFileFormat();
if (ff.JP2FFUsed)
{
in_stream.seek(ff.FirstCodeStreamPos);
}
// +----------------------------+
// | Instantiate decoding chain |
// +----------------------------+
// **** Header decoder ****
// Instantiate header decoder and read main header
HeaderInfo hi = new HeaderInfo();
HeaderDecoder hd;
try
{
hd = new HeaderDecoder(in_stream, pl, hi);
}
catch (EndOfStreamException e)
{
throw new ArgumentException("Codestream too short or bad header, unable to decode.", e);
}
int nCompCod = hd.NumComps;
int nTiles = hi.sizValue.NumTiles;
DecoderSpecs decSpec = hd.DecoderSpecs;
// Get demixed bitdepths
int[] depth = new int[nCompCod];
for (int i = 0; i < nCompCod; i++)
{
depth[i] = hd.getOriginalBitDepth(i);
}
// **** Bit stream reader ****
BitstreamReaderAgent breader;
try
{
breader = BitstreamReaderAgent.createInstance(in_stream, hd, pl, decSpec, false, hi);
}
catch (IOException e)
{
throw new ArgumentException("Error while reading bit stream header or parsing packets.", e);
}
catch (ArgumentException e)
{
throw new ArgumentException("Cannot instantiate bit stream reader.", e);
}
breader.setTile(0, 0);
return ((FileBitstreamReaderAgent)breader).layerStarts;
}
#endregion
#region Static Encoder Methods
public static void ToFile(Bitmap bitmap, string filename)
{
using (FileStream stream = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.ReadWrite))
{
ToStream(bitmap, stream);
}
}
public static byte[] ToArray(Bitmap bitmap)
{
using (MemoryStream stream = new MemoryStream())
{
ToStream(bitmap, stream);
return stream.ToArray();
}
}
public static void ToStream(Bitmap bitmap, Stream stream)
{
throw new NotImplementedException();
}
#endregion
#region Default Parameter Loader
public static ParameterList GetDefaultParameterList(string[][] pinfo)
{
ParameterList pl = new ParameterList();
string[][] str;
str = BitstreamReaderAgent.ParameterInfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
str = EntropyDecoder.ParameterInfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
str = ROIDeScaler.ParameterInfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
str = Dequantizer.ParameterInfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
str = InvCompTransf.ParameterInfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
str = HeaderDecoder.ParameterInfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
str = ICCProfiler.ParameterInfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
str = pinfo;
if (str != null) for (int i = str.Length - 1; i >= 0; i--)
pl.Set(str[i][0], str[i][3]);
return pl;
}
#endregion
#region Decoder Parameters
private static String[][] decoder_pinfo = {
new string[] { "u", "[on|off]",
"Prints usage information. "+
"If specified all other arguments (except 'v') are ignored","off"},
new string[] { "v", "[on|off]",
"Prints version and copyright information","off"},
new string[] { "verbose", "[on|off]",
"Prints information about the decoded codestream","on"},
new string[] { "pfile", "<filename>",
"Loads the arguments from the specified file. Arguments that are "+
"specified on the command line override the ones from the file.\n"+
"The arguments file is a simple text file with one argument per "+
"line of the following form:\n" +
" <argument name>=<argument value>\n"+
"If the argument is of boolean type (i.e. its presence turns a "+
"feature on), then the 'on' value turns it on, while the 'off' "+
"value turns it off. The argument name does not include the '-' "+
"or '+' character. Long lines can be broken into several lines "+
"by terminating them with '\\'. Lines starting with '#' are "+
"considered as comments. This option is not recursive: any 'pfile' "+
"argument appearing in the file is ignored.",null},
new string[] { "res", "<resolution level index>",
"The resolution level at which to reconstruct the image "+
" (0 means the lowest available resolution whereas the maximum "+
"resolution level corresponds to the original image resolution). "+
"If the given index"+
" is greater than the number of available resolution levels of the "+
"compressed image, the image is reconstructed at its highest "+
"resolution (among all tile-components). Note that this option"+
" affects only the inverse wavelet transform and not the number "+
" of bytes read by the codestream parser: this number of bytes "+
"depends only on options '-nbytes' or '-rate'.", null},
new string[] { "i", "<filename or url>",
"The file containing the JPEG 2000 compressed data. This can be "+
"either a JPEG 2000 codestream or a JP2 file containing a "+
"JPEG 2000 "+
"codestream. In the latter case the first codestream in the file "+
"will be decoded. If an URL is specified (e.g., http://...) "+
"the data will be downloaded and cached in memory before decoding. "+
"This is intended for easy use in applets, but it is not a very "+
"efficient way of decoding network served data.", null},
new string[] { "o", "<filename>",
"This is the name of the file to which the decompressed image "+
"is written. If no output filename is given, the image is "+
"displayed on the screen. "+
"Output file format is PGX by default. If the extension"+
" is '.pgm' then a PGM file is written as output, however this is "+
"only permitted if the component bitdepth does not exceed 8. If "+
"the extension is '.ppm' then a PPM file is written, however this "+
"is only permitted if there are 3 components and none of them has "+
"a bitdepth of more than 8. If there is more than 1 component, "+
"suffices '-1', '-2', '-3', ... are added to the file name, just "+
"before the extension, except for PPM files where all three "+
"components are written to the same file.",null},
new string[] { "rate","<decoding rate in bpp>",
"Specifies the decoding rate in bits per pixel (bpp) where the "+
"number of pixels is related to the image's original size (Note:"+
" this number is not affected by the '-res' option). If it is equal"+
"to -1, the whole codestream is decoded. "+
"The codestream is either parsed (default) or truncated depending "+
"the command line option '-parsing'. To specify the decoding "+
"rate in bytes, use '-nbytes' options instead.","-1"},
new string[] { "nbytes","<decoding rate in bytes>",
"Specifies the decoding rate in bytes. "+
"The codestream is either parsed (default) or truncated depending "+
"the command line option '-parsing'. To specify the decoding "+
"rate in bits per pixel, use '-rate' options instead.","-1"},
new string[] { "parsing", null,
"Enable or not the parsing mode when decoding rate is specified "+
"('-nbytes' or '-rate' options). If it is false, the codestream "+
"is decoded as if it were truncated to the given rate. If it is "+
"true, the decoder creates, truncates and decodes a virtual layer"+
" progressive codestream with the same truncation points in each "+
"code-block.","on"},
new string[] { "ncb_quit","<max number of code blocks>",
"Use the ncb and lbody quit conditions. If state information is "+
"found for more code blocks than is indicated with this option, "+
"the decoder "+
"will decode using only information found before that point. "+
"Using this otion implies that the 'rate' or 'nbyte' parameter "+
"is used to indicate the lbody parameter which is the number of "+
"packet body bytes the decoder will decode.","-1"},
new string[] { "l_quit","<max number of layers>",
"Specifies the maximum number of layers to decode for any code-"+
"block","-1"},
new string[] { "m_quit","<max number of bit planes>",
"Specifies the maximum number of bit planes to decode for any code"+
"-block","-1"},
new string[] { "poc_quit",null,
"Specifies the whether the decoder should only decode code-blocks "+
"included in the first progression order.","off"},
new string[] { "one_tp",null,
"Specifies whether the decoder should only decode the first "+
"tile part of each tile.","off"},
new string[] { "comp_transf",null,
"Specifies whether the component transform indicated in the "+
"codestream should be used.","on"},
new string[] { "debug", null,
"Print debugging messages when an error is encountered.","off"},
new string[] { "cdstr_info", null,
"Display information about the codestream. This information is: "+
"\n- Marker segments value in main and tile-part headers,"+
"\n- Tile-part length and position within the code-stream.", "off"},
new string[] { "nocolorspace",null,
"Ignore any colorspace information in the image.","off"},
new string[] { "colorspace_debug", null,
"Print debugging messages when an error is encountered in the"+
" colorspace module.","off"}
};
#endregion
#region Encoder Parameters
private static String[][] encoder_pinfo = {
new string[] { "debug", null,
"Print debugging messages when an error is encountered.","off"},
new string[] { "disable_jp2_extension", "[on|off]",
"JJ2000 automatically adds .jp2 extension when using 'file_format'"+
"option. This option disables it when on.", "off"},
new string[] { "file_format", "[on|off]",
"Puts the JPEG 2000 codestream in a JP2 file format wrapper.","off"},
new string[] { "pph_tile", "[on|off]",
"Packs the packet headers in the tile headers.","off"},
new string[] { "pph_main", "[on|off]",
"Packs the packet headers in the main header.","off"},
new string[] { "pfile", "<filename of arguments file>",
"Loads the arguments from the specified file. Arguments that are "+
"specified on the command line override the ones from the file.\n"+
"The arguments file is a simple text file with one argument per "+
"line of the following form:\n" +
" <argument name>=<argument value>\n"+
"If the argument is of boolean type (i.e. its presence turns a "+
"feature on), then the 'on' value turns it on, while the 'off' "+
"value turns it off. The argument name does not include the '-' "+
"or '+' character. Long lines can be broken into several lines "+
"by terminating them with '\'. Lines starting with '#' are "+
"considered as comments. This option is not recursive: any 'pfile' "+
"argument appearing in the file is ignored.",null},
new string[] { "tile_parts", "<packets per tile-part>",
"This option specifies the maximum number of packets to have in "+
"one tile-part. 0 means include all packets in first tile-part "+
"of each tile","0"},
new string[] { "tiles", "<nominal tile width> <nominal tile height>",
"This option specifies the maximum tile dimensions to use. "+
"If both dimensions are 0 then no tiling is used.","0 0"},
new string[] { "ref", "<x> <y>",
"Sets the origin of the image in the canvas system. It sets the "+
"coordinate of the top-left corner of the image reference grid, "+
"with respect to the canvas origin","0 0"},
new string[] { "tref", "<x> <y>",
"Sets the origin of the tile partitioning on the reference grid, "+
"with respect to the canvas origin. The value of 'x' ('y') "+
"specified can not be larger than the 'x' one specified in the ref "+
"option.","0 0"},
new string[] { "rate", "<output bitrate in bpp>",
"This is the output bitrate of the codestream in bits per pixel."+
" When equal to -1, no image information (beside quantization "+
"effects) is discarded during compression.\n"+
"Note: In the case where '-file_format' option is used, the "+
"resulting file may have a larger bitrate.","-1"},
new string[] { "lossless", "[on|off]",
"Specifies a lossless compression for the encoder. This options"+
" is equivalent to use reversible quantization ('-Qtype "+
"reversible')"+
" and 5x3 wavelet filters pair ('-Ffilters w5x3'). Note that "+
"this option cannot be used with '-rate'. When this option is "+
"off, the quantization type and the filters pair is defined by "+
"'-Qtype' and '-Ffilters' respectively.","off"},
new string[] { "i", "<image file> [,<image file> [,<image file> ... ]]",
"Mandatory argument. This option specifies the name of the input "+
"image files. If several image files are provided, they have to be"+
" separated by commas in the command line. Supported formats are "+
"PGM (raw), PPM (raw) and PGX, "+
"which is a simple extension of the PGM file format for single "+
"component data supporting arbitrary bitdepths. If the extension "+
"is '.pgm', PGM-raw file format is assumed, if the extension is "+
"'.ppm', PPM-raw file format is assumed, otherwise PGX file "+
"format is assumed. PGM and PPM files are assumed to be 8 bits "+
"deep. A multi-component image can be specified by either "+
"specifying several PPM and/or PGX files, or by specifying one "+
"PPM file.",null},
new string[] { "o", "<file name>",
"Mandatory argument. This option specifies the name of the output "+
"file to which the codestream will be written.",null},
new string[] { "verbose", null,
"Prints information about the obtained bit stream.","on"},
new string[] { "v", "[on|off]",
"Prints version and copyright information.","off"},
new string[] { "u", "[on|off]",
"Prints usage information. "+
"If specified all other arguments (except 'v') are ignored","off"},
};
#endregion
}
}