/// <summary> Constructs a new ForwCompTransf object that operates on the
/// specified source of image data.
///
/// </summary>
/// <param name="imgSrc">The source from where to get the data to be
/// transformed
///
/// </param>
/// <param name="decSpec">The decoder specifications
///
/// </param>
/// <param name="utdepth">The bit depth of the un-transformed components
///
/// </param>
/// <param name="pl">The command line optinons of the decoder
///
/// </param>
/// <seealso cref="BlkImgDataSrc">
///
/// </seealso>
public InvCompTransf(BlkImgDataSrc imgSrc, DecoderSpecs decSpec, int[] utdepth, ParameterList pl) : base(imgSrc)
{
this.cts = decSpec.cts;
this.wfs = decSpec.wfs;
src = imgSrc;
this.utdepth = utdepth;
noCompTransf = !(pl.getBooleanParameter("comp_transf"));
}
//private bool[][] reversible;
/// <summary> Initializes this object with the given source of wavelet
/// coefficients. It initializes the resolution level for full resolutioin
/// reconstruction.
///
/// </summary>
/// <param name="src">from where the wavelet coefficinets should be obtained.
///
/// </param>
/// <param name="decSpec">The decoder specifications
///
/// </param>
public InvWTFull(CBlkWTDataSrcDec src, DecoderSpecs decSpec) : base(src, decSpec)
{
this.src = src;
int nc = src.NumComps;
reconstructedComps = new DataBlk[nc];
ndl = new int[nc];
}
//private bool[][] reversible;
/// <summary> Initializes this object with the given source of wavelet
/// coefficients. It initializes the resolution level for full resolutioin
/// reconstruction.
///
/// </summary>
/// <param name="src">from where the wavelet coefficinets should be obtained.
///
/// </param>
/// <param name="decSpec">The decoder specifications
///
/// </param>
public InvWTFull(CBlkWTDataSrcDec src, DecoderSpecs decSpec) : base(src, decSpec)
{
this.src = src;
int nc = src.NumComps;
reconstructedComps = new DataBlk[nc];
ndl = new int[nc];
pw = FacilityManager.ProgressWatch;
}
/// <summary> Initializes the source of compressed data. And sets the number of range
/// bits and fraction bits and receives the parameters for the dequantizer.
///
/// </summary>
/// <param name="src">From where to obtain the quantized data.
///
/// </param>
/// <param name="rb">The number of "range bits" (bitdepth) for each component
/// (must be the "range bits" of the un-transformed components). For a
/// definition of "range bits" see the getNomRangeBits() method.
///
/// </param>
/// <param name="qts">The quantizer type spec
///
/// </param>
/// <param name="qsss">The dequantizer step sizes spec
///
/// </param>
/// <seealso cref="Dequantizer.getNomRangeBits">
///
/// </seealso>
/// <exception cref="IllegalArgumentException">Thrown if 'outdt' is neither
/// TYPE_FLOAT nor TYPE_INT, or if 'param' specify reversible quantization
/// and 'outdt' is not TYPE_INT or 'fp' has non-zero values, or if 'outdt'
/// is TYPE_FLOAT and 'fp' has non-zero values.
///
/// </exception>
public StdDequantizer(CBlkQuantDataSrcDec src, int[] utrb, DecoderSpecs decSpec) : base(src, utrb, decSpec)
{
if (utrb.Length != src.NumComps)
{
throw new System.ArgumentException("Invalid rb argument");
}
this.qsss = decSpec.qsss;
this.qts = decSpec.qts;
this.gbs = decSpec.gbs;
}
/// <summary> Initializes the source of compressed data.
///
/// </summary>
/// <param name="src">From where to obtain the quantized data.
///
/// </param>
/// <param name="rb">The number of "range bits" for each component (must be the
/// "range bits" of the un-transformed components. For a definition of
/// "range bits" see the getNomRangeBits() method.
///
/// </param>
/// <seealso cref="getNomRangeBits">
///
/// </seealso>
public Dequantizer(CBlkQuantDataSrcDec src, int[] utrb, DecoderSpecs decSpec) : base(src)
{
if (utrb.Length != src.NumComps)
{
throw new System.ArgumentException();
}
this.src = src;
this.utrb = utrb;
this.cts = decSpec.cts;
this.wfs = decSpec.wfs;
}
/// <summary> Initializes this object with the given source of wavelet
/// coefficients. It initializes the resolution level for full resolutioin
/// reconstruction (i.e. the maximum resolution available from the 'src'
/// source).
///
/// <p>It is assumed here that all tiles and components have the same
/// reconstruction resolution level. If that was not the case it should be
/// the value for the current tile of the source.</p>
///
/// </summary>
/// <param name="src">from where the wavelet coefficinets should be obtained.
///
/// </param>
/// <param name="decSpec">The decoder specifications
///
/// </param>
public InverseWT(MultiResImgData src, DecoderSpecs decSpec)
: base(src, decSpec)
{
}
/// <summary> Creates an InverseWT object that works on the data type of the source,
/// with the special additional parameters from the parameter
/// list. Currently the parameter list is ignored since no special
/// parameters can be specified for the inverse wavelet transform yet.
///
/// </summary>
/// <param name="src">The source of data for the inverse wavelet
/// transform.
///
/// </param>
/// <param name="pl">The parameter list containing parameters applicable to the
/// inverse wavelet transform (other parameters can also be present).
///
/// </param>
public static InverseWT createInstance(CBlkWTDataSrcDec src, DecoderSpecs decSpec)
{
// full page wavelet transform
return(new InvWTFull(src, decSpec));
}
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);
}
/// <summary> Creates a ROIDeScaler object. The information needed to create the
/// object is the Entropy decoder used and the parameters.
///
/// </summary>
/// <param name="src">The source of data that is to be descaled
///
/// </param>
/// <param name="pl">The parameter list (or options).
///
/// </param>
/// <param name="decSpec">The decoding specifications
///
/// </param>
/// <exception cref="IllegalArgumentException">If an error occurs while parsing
/// the options in 'pl'
///
/// </exception>
public static ROIDeScaler createInstance(CBlkQuantDataSrcDec src, ParameterList pl, DecoderSpecs decSpec)
{
System.String noRoi;
//int i;
// Check parameters
pl.checkList(OPT_PREFIX, CSJ2K.j2k.util.ParameterList.toNameArray(pinfo));
// Check if no_roi specified in command line or no roi signalled
// in bit stream
noRoi = pl.getParameter("Rno_roi");
if (noRoi != null || decSpec.rois == null)
{
// no_roi specified in commandline!
return(new ROIDeScaler(src, null));
}
return(new ROIDeScaler(src, decSpec.rois));
}
/// <summary> Instantiates the 'InvWTAdapter' object using the specified
/// 'MultiResImgData' source. The reconstruction resolution level is set to
/// full resolution (i.e. the maximum resolution level).
///
/// </summary>
/// <param name="src">From where to obtain the values to return
///
/// </param>
/// <param name="decSpec">The decoder specifications
///
/// </param>
protected internal InvWTAdapter(MultiResImgData src, DecoderSpecs decSpec)
{
mressrc = src;
this.decSpec = decSpec;
maxImgRes = decSpec.dls.Min;
}
