/// <summary> Reads the Grib data with a certain offsets in the file.
///
/// </summary>
/// <param name="GdsOffset">
/// </param>
/// <param name="PdsOffset">
/// </param>
/// <throws> IOException if raf does not contain a valid GRIB record. </throws>
/// <returns> float[]
/// </returns>
public float[] getData(long GdsOffset, long PdsOffset)
{
if (raf == null)
{
throw new ApplicationException("Grib2Input.scan called without file");
}
long start = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
raf.Seek(GdsOffset, System.IO.SeekOrigin.Begin);
// Need section 3, 4, 5, 6, and 7 to read/interpet the data
Grib2GridDefinitionSection gds = new Grib2GridDefinitionSection(raf, false); // Section 3 no checksum
raf.Seek(PdsOffset, System.IO.SeekOrigin.Begin); // could have more than one pds for a gds
Grib2ProductDefinitionSection pds = new Grib2ProductDefinitionSection(raf); // Section 4
Grib2DataRepresentationSection drs = new Grib2DataRepresentationSection(raf); // Section 5
Grib2BitMapSection bms = new Grib2BitMapSection(raf, gds); // Section 6
Grib2DataSection ds = new Grib2DataSection(true, raf, gds, drs, bms); // Section 7
//System.out.println("DS offset=" + ds.getOffset() );
return(ds.Data);
} // end getData
private int Xlength; // length of the x axis
#endregion Fields
#region Constructors
// *** constructors *******************************************************
/// <summary> Constructor for a Grib2 Data Section.</summary>
/// <param name="getData">
/// </param>
/// <param name="raf">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">
/// </param>
/// <throws> IOException </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'Stream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib2DataSection(bool getData, Stream raf, Grib2GridDefinitionSection gds, Grib2DataRepresentationSection drs, Grib2BitMapSection bms)
{
//System.out.println( "raf.FilePointer=" + raf.FilePointer() );
// octets 1-4 (Length of DS)
length = GribNumbers.int4(raf);
//System.out.println( "DS length=" + length );
//System.out.println( "DS calculated end=" + ( raf.getFilePointer() + length -4 ));
// octet 5 section 7
section = raf.ReadByte();
//System.out.println( "DS is 7, section=" + section );
if (!getData)
{
// skip data read
//System.out.println( "raf.position before reposition="+raf.getFilePointer());
//System.out.println( "raf.length=" + raf.length() );
// sanity check for erronous ds length
if (length > 0 && length < raf.Length)
{
SupportClass.Skip(raf, length - 5);
//System.out.println( "raf.skipBytes = " + (length -5) );
}
else
{
length = 5; // only read length and section
}
//System.out.println( "raf.position after skip=" + raf.getFilePointer() );
return ;
}
int dtn = drs.DataTemplateNumber;
//System.out.println( "DS dtn=" + dtn );
if (dtn == 0 || dtn == 1)
{
// 0: Grid point data - simple packing
// 1: Matrix values - simple packing
simpleUnpacking(raf, gds, drs, bms);
}
else if (dtn == 2)
{
// 2:Grid point data - complex packing
complexUnpacking(raf, gds, drs);
}
else if (dtn == 3)
{
// 3: complex packing with spatial differencing
complexUnpackingWithSpatial(raf, gds, drs);
}
else if (dtn == 40 || dtn == 40000)
{
throw new NotImplementedException ("JPEG 2000 Stream Format");
// JPEG 2000 Stream Format
//jpeg2000Unpacking(raf, gds, drs, bms);
}
}
/// <summary> Construction for Grib2Record.</summary>
/// <param name="header">
/// </param>
/// <param name="is">
/// </param>
/// <param name="id">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="pds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">
/// </param>
/// <param name="GdsOffset">
/// </param>
/// <param name="PdsOffset">PDS offset in Grib file
/// </param>
public Grib2Record(System.String header, Grib2IndicatorSection is_Renamed,
Grib2IdentificationSection id, Grib2GridDefinitionSection gds,
Grib2ProductDefinitionSection pds, Grib2DataRepresentationSection drs,
Grib2BitMapSection bms, long GdsOffset, long PdsOffset,
Grib2LocalUseSection lus)
{
this.header = header;
this.is_Renamed = is_Renamed;
this.id = id;
this.gds = gds;
this.pds = pds;
this.drs = drs;
//this.bms = bms;
this.GdsOffset = GdsOffset;
this.PdsOffset = PdsOffset;
this.lus = lus;
}
/// <summary> scans the Grib2 file obtaining Products or Records that contain all
/// needed information for data extraction later. For most purposes,
/// getProductsOnly should be set to true, it's lightweight of getRecords.
/// </summary>
/// <param name="getProductsOnly">
/// </param>
/// <param name="oneRecord">
/// </param>
/// <returns> success
/// </returns>
/// <throws> NotSupportedException </throws>
/// <throws> IOException </throws>
public bool scan(bool getProductsOnly, bool oneRecord)
{
if (raf == null)
{
throw new ApplicationException("Grib2Input.scan called without file");
}
long start = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
Grib2IndicatorSection is_Renamed = null;
Grib2IdentificationSection id = null;
Grib2LocalUseSection lus = null;
Grib2GridDefinitionSection gds = null;
// if raf.getFilePointer() != 0 then called from Grib2IndexExtender
if (raf.Position > 4)
{
raf.Seek(raf.Position - 4, System.IO.SeekOrigin.Begin);
Grib2EndSection es = new Grib2EndSection(raf);
if (!es.EndFound)
{
// ending found somewhere in file
throw new NoValidGribException("Grib2Input.scan failed to find end of record");
}
//System.out.println( "Scan succeeded to find end of record");
}
//System.out.println("Scan file pointer =" + raf.getFilePointer());
long GdsOffset = 0; // GDS offset from start of file
bool startAtHeader = true; // otherwise skip to GDS
bool processGDS = true;
while (raf.Position < raf.Length)
{
if (startAtHeader)
{
// begining of record
if (!seekHeader(raf, raf.Length))
{
//System.out.println( "Scan seekHeader failed" );
throw new NoValidGribException("Grib2Input.scan failed to find header");
}
// Read Section 0 Indicator Section
is_Renamed = new Grib2IndicatorSection(raf); // section 0
//System.out.println( "Grib record length=" + is.getGribLength());
// Read other Sections
id = new Grib2IdentificationSection(raf); // Section 1
} // end startAtHeader
if (processGDS)
{
// check for Local Use Section 2
lus = new Grib2LocalUseSection(raf);
// obtain GDS offset in the file for this record
GdsOffset = raf.Position;
// Section 3
gds = new Grib2GridDefinitionSection(raf, getProductsOnly);
//System.out.println( "GDS length=" + gds.getLength() );
} // end processGDS
// obtain PDS offset in the file for this record
long PdsOffset = raf.Position;
Grib2ProductDefinitionSection pds = new Grib2ProductDefinitionSection(raf); // Section 4
Grib2DataRepresentationSection drs = null;
Grib2BitMapSection bms = null;
Grib2DataSection ds = null;
drs = new Grib2DataRepresentationSection(raf); // Section 5
bms = new Grib2BitMapSection(raf, gds); // Section 6
//ds = new Grib2DataSection( getData, raf, gds, drs, bms ); //Section 7
ds = new Grib2DataSection(false, raf, gds, drs, bms); //Section 7
// assume scan ok
if (getProductsOnly)
{
Grib2Product gp = new Grib2Product(header, is_Renamed, id, getGDSkey(gds), pds, GdsOffset, PdsOffset);
products.Add(gp);
}
else
{
Grib2Record gr = new Grib2Record(header, is_Renamed, id, gds, pds, drs, bms, GdsOffset, PdsOffset, lus);
records.Add(gr);
}
if (oneRecord)
return true;
// early return because ending "7777" missing
if (raf.Position > raf.Length)
{
raf.Seek(0, System.IO.SeekOrigin.Begin);
return true;
}
// EndSection processing section 8
int ending = GribNumbers.int4(raf);
//System.out.println( "ending = " + ending );
if (ending == 926365495)
{
// record ending string 7777 as a number
startAtHeader = true;
processGDS = true;
}
else
{
int section = raf.ReadByte(); // check if GDS or PDS section, 3 or 4
//System.out.println( "section = " + section );
//reset back to begining of section
raf.Seek(raf.Position - 5, System.IO.SeekOrigin.Begin);
if (section == 3)
{
// start processing at GDS
startAtHeader = false;
processGDS = true;
}
else if (section == 4)
{
// start processing at PDS
startAtHeader = false;
processGDS = false;
}
else
{
// error
Grib2EndSection es = new Grib2EndSection(raf);
if (es.EndFound)
{
// ending found somewhere in file
startAtHeader = true;
processGDS = true;
}
else
{
//System.err.println( "Grib2Input: possible file corruption");
throw new NoValidGribException("Grib2Input.scan failed to find end of record");
}
}
}
//System.out.println( "raf.getFilePointer=" + raf.getFilePointer() );
//System.out.println( "raf.length()=" + raf.length() );
} // end raf.getFilePointer() < raf.length()
//System.out.println("GribInput: processed in " +
// (System.currentTimeMillis()- start) + " milliseconds");
return true;
}
/// <summary> scans the Grib2 file obtaining Products or Records that contain all
/// needed information for data extraction later. For most purposes,
/// getProductsOnly should be set to true, it's lightweight of getRecords.
/// </summary>
/// <param name="getProductsOnly">
/// </param>
/// <param name="oneRecord">
/// </param>
/// <returns> success
/// </returns>
/// <throws> NotSupportedException </throws>
/// <throws> IOException </throws>
public bool scan(bool getProductsOnly, bool oneRecord)
{
if (raf == null)
{
throw new ApplicationException("Grib2Input.scan called without file");
}
long start = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
Grib2IndicatorSection is_Renamed = null;
Grib2IdentificationSection id = null;
Grib2LocalUseSection lus = null;
Grib2GridDefinitionSection gds = null;
// if raf.getFilePointer() != 0 then called from Grib2IndexExtender
if (raf.Position > 4)
{
raf.Seek(raf.Position - 4, System.IO.SeekOrigin.Begin);
Grib2EndSection es = new Grib2EndSection(raf);
if (!es.EndFound)
{
// ending found somewhere in file
throw new NoValidGribException("Grib2Input.scan failed to find end of record");
}
//System.out.println( "Scan succeeded to find end of record");
}
//System.out.println("Scan file pointer =" + raf.getFilePointer());
long GdsOffset = 0; // GDS offset from start of file
bool startAtHeader = true; // otherwise skip to GDS
bool processGDS = true;
while (raf.Position < raf.Length)
{
if (startAtHeader)
{
// begining of record
if (!seekHeader(raf, raf.Length))
{
//System.out.println( "Scan seekHeader failed" );
throw new NoValidGribException("Grib2Input.scan failed to find header");
}
// Read Section 0 Indicator Section
is_Renamed = new Grib2IndicatorSection(raf); // section 0
//System.out.println( "Grib record length=" + is.getGribLength());
if (is_Renamed.GribEdition != 2)
{
throw new NoValidGribException("Grib2Input.scan expected GRIB2 file");
}
// Read other Sections
id = new Grib2IdentificationSection(raf); // Section 1
} // end startAtHeader
if (processGDS)
{
// check for Local Use Section 2
lus = new Grib2LocalUseSection(raf);
// obtain GDS offset in the file for this record
GdsOffset = raf.Position;
// Section 3
gds = new Grib2GridDefinitionSection(raf, getProductsOnly);
//System.out.println( "GDS length=" + gds.getLength() );
} // end processGDS
// obtain PDS offset in the file for this record
long PdsOffset = raf.Position;
Grib2ProductDefinitionSection pds = new Grib2ProductDefinitionSection(raf); // Section 4
Grib2DataRepresentationSection drs = null;
Grib2BitMapSection bms = null;
Grib2DataSection ds = null;
drs = new Grib2DataRepresentationSection(raf); // Section 5
bms = new Grib2BitMapSection(raf, gds); // Section 6
//ds = new Grib2DataSection( getData, raf, gds, drs, bms ); //Section 7
ds = new Grib2DataSection(false, raf, gds, drs, bms); //Section 7
// assume scan ok
if (getProductsOnly)
{
Grib2Product gp = new Grib2Product(header, is_Renamed, id, getGDSkey(gds), pds, GdsOffset, PdsOffset);
products.Add(gp);
}
else
{
Grib2Record gr = new Grib2Record(header, is_Renamed, id, gds, pds, drs, bms, GdsOffset, PdsOffset, lus);
records.Add(gr);
}
if (oneRecord)
{
return(true);
}
// early return because ending "7777" missing
if (raf.Position > raf.Length)
{
raf.Seek(0, System.IO.SeekOrigin.Begin);
return(true);
}
// EndSection processing section 8
int ending = GribNumbers.int4(raf);
//System.out.println( "ending = " + ending );
if (ending == 926365495)
{
// record ending string 7777 as a number
startAtHeader = true;
processGDS = true;
}
else
{
int section = raf.ReadByte(); // check if GDS or PDS section, 3 or 4
//System.out.println( "section = " + section );
//reset back to begining of section
raf.Seek(raf.Position - 5, System.IO.SeekOrigin.Begin);
if (section == 3)
{
// start processing at GDS
startAtHeader = false;
processGDS = true;
}
else if (section == 4)
{
// start processing at PDS
startAtHeader = false;
processGDS = false;
}
else
{
// error
Grib2EndSection es = new Grib2EndSection(raf);
if (es.EndFound)
{
// ending found somewhere in file
startAtHeader = true;
processGDS = true;
}
else
{
//System.err.println( "Grib2Input: possible file corruption");
throw new NoValidGribException("Grib2Input.scan failed to find end of record");
}
}
}
//System.out.println( "raf.getFilePointer=" + raf.getFilePointer() );
//System.out.println( "raf.length()=" + raf.length() );
} // end raf.getFilePointer() < raf.length()
//System.out.println("GribInput: processed in " +
// (System.currentTimeMillis()- start) + " milliseconds");
return(true);
} // end scan
/// <summary> Construction for Grib2Record.</summary>
/// <param name="header">
/// </param>
/// <param name="is">
/// </param>
/// <param name="id">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="pds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">
/// </param>
/// <param name="GdsOffset">
/// </param>
/// <param name="PdsOffset">PDS offset in Grib file
/// </param>
public Grib2Record(System.String header, Grib2IndicatorSection is_Renamed,
Grib2IdentificationSection id, Grib2GridDefinitionSection gds,
Grib2ProductDefinitionSection pds, Grib2DataRepresentationSection drs,
Grib2BitMapSection bms, long GdsOffset, long PdsOffset,
Grib2LocalUseSection lus)
{
this.header = header;
this.is_Renamed = is_Renamed;
this.id = id;
this.gds = gds;
this.pds = pds;
this.drs = drs;
//this.bms = bms;
this.GdsOffset = GdsOffset;
this.PdsOffset = PdsOffset;
this.lus = lus;
}
/// <summary> Reads the Grib data with a certain offsets in the file.
///
/// </summary>
/// <param name="GdsOffset">
/// </param>
/// <param name="PdsOffset">
/// </param>
/// <throws> IOException if raf does not contain a valid GRIB record. </throws>
/// <returns> float[]
/// </returns>
public float[] getData(long GdsOffset, long PdsOffset)
{
if (raf == null)
{
throw new ApplicationException("Grib2Input.scan called without file");
}
long start = (System.DateTime.Now.Ticks - 621355968000000000) / 10000;
raf.Seek(GdsOffset, System.IO.SeekOrigin.Begin);
// Need section 3, 4, 5, 6, and 7 to read/interpet the data
Grib2GridDefinitionSection gds = new Grib2GridDefinitionSection(raf, false); // Section 3 no checksum
raf.Seek(PdsOffset, System.IO.SeekOrigin.Begin); // could have more than one pds for a gds
Grib2ProductDefinitionSection pds = new Grib2ProductDefinitionSection(raf); // Section 4
Grib2DataRepresentationSection drs = new Grib2DataRepresentationSection(raf); // Section 5
Grib2BitMapSection bms = new Grib2BitMapSection(raf, gds); // Section 6
Grib2DataSection ds = new Grib2DataSection(true, raf, gds, drs, bms); // Section 7
//System.out.println("DS offset=" + ds.getOffset() );
return ds.Data;
}
} // end complexUnpackingWithSpatial
/// <summary> Jpeg2000 unpacking method for Grib2 data.</summary>
/// <param name="raf">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">bit-map section object
/// </param>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
private void jpeg2000Unpacking(System.IO.FileStream raf, Grib2GridDefinitionSection gds, Grib2DataRepresentationSection drs, Grib2BitMapSection bms)
{
// 6-xx jpeg2000 data block to decode
// dataPoints are number of points encoded, it could be less than the
// numberPoints in the grid record if bitMap is used, otherwise equal
int dataPoints = drs.DataPoints;
//System.out.println( "DS DRS dataPoints=" + drs.getDataPoints() );
//System.out.println( "DS length=" + length );
float pmv = drs.PrimaryMissingValue;
//System.out.println( "DS pmv=" + pmv );
int nb = drs.NumberOfBits;
//System.out.println( "DS nb = " + nb );
int D = drs.DecimalScaleFactor;
//System.out.println( "DS D=" + D );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float DD = (float)System.Math.Pow((double)10, (double)D);
//System.out.println( "DS DD=" + DD );
float R = drs.ReferenceValue;
//System.out.println( "DS R=" + R );
int E = drs.BinaryScaleFactor;
//System.out.println( "DS E=" + E );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float EE = (float)System.Math.Pow((double)2.0, (double)E);
//System.out.println( "DS EE=" + EE );
/*Grib2JpegDecoder g2j = null;
* if (nb != 0)
* {
* // there's data to decode
* System.String[] argv = new System.String[4];
* argv[0] = "-rate";
* argv[1] = System.Convert.ToString(nb);
* argv[2] = "-verbose";
* argv[3] = "off";
* //argv[ 2 ] = "-nocolorspace" ;
* //argv[ 3 ] = "-Rno_roi" ;
* //argv[ 4 ] = "-cdstr_info" ;
* //argv[ 5 ] = "-verbose" ;
* //argv[ 6 ] = "-debug" ;
* g2j = new Grib2JpegDecoder(argv);
* g2j.decode(raf, length - 5);
* }
*/
Jpeg2000Decoder decoder = new Jpeg2000Decoder();
byte[] buf = new byte[length - 5];
// TODO Check cast
int res = raf.Read(buf, 0, length - 5);
int[] values = null;
if (res == length - 5)
{
values = decoder.Decode(buf, dataPoints);
}
else
{
// TODO Error handling
}
int numberPoints = gds.NumberPoints;
//System.out.println( "DS GDS NumberPoints=" + gds.getNumberPoints() );
data = new float[numberPoints];
bool[] bitmap = bms.Bitmap;
if (bitmap == null)
{
if (nb == 0)
{
// no data decoded, set to primaryMissingValue
for (int i = 0; i < numberPoints; i++)
{
data[i] = pmv;
}
}
else
{
//System.out.println( "DS jpeg data length ="+ g2j.data.length );
// record has missing bitmap
if (values.Length != numberPoints)
{
data = null;
return;
}
for (int i = 0; i < numberPoints; i++)
{
//Y = (R + ( 0 + X2) * EE)/DD ;
data[i] = (R + values[i] * EE) / DD;
//System.out.println( "DS data[ " + i +" ]=" + data[ i ] );
}
}
}
else
{
for (int i = 0, j = 0; i < bitmap.Length; i++)
{
if (bitmap[i])
{
data[i] = (R + values[j++] * EE) / DD;
}
else
{
data[i] = pmv;
}
}
}
scanMode = gds.ScanMode;
scanningModeCheck();
} // end jpeg2000Unpacking
private int Xlength; // length of the x axis
// *** constructors *******************************************************
/// <summary> Constructor for a Grib2 Data Section.</summary>
/// <param name="getData">
/// </param>
/// <param name="raf">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">
/// </param>
/// <throws> IOException </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
public Grib2DataSection(bool getData, System.IO.FileStream raf, Grib2GridDefinitionSection gds, Grib2DataRepresentationSection drs, Grib2BitMapSection bms)
{
//System.out.println( "raf.FilePointer=" + raf.FilePointer() );
// octets 1-4 (Length of DS)
length = GribNumbers.int4(raf);
//System.out.println( "DS length=" + length );
//System.out.println( "DS calculated end=" + ( raf.getFilePointer() + length -4 ));
// octet 5 section 7
section = raf.ReadByte();
//System.out.println( "DS is 7, section=" + section );
if (!getData)
{
// skip data read
//System.out.println( "raf.position before reposition="+raf.getFilePointer());
//System.out.println( "raf.length=" + raf.length() );
// sanity check for erronous ds length
if (length > 0 && length < raf.Length)
{
SupportClass.Skip(raf, length - 5);
//System.out.println( "raf.skipBytes = " + (length -5) );
}
else
{
length = 5; // only read length and section
}
//System.out.println( "raf.position after skip=" + raf.getFilePointer() );
return;
}
int dtn = drs.DataTemplateNumber;
//System.out.println( "DS dtn=" + dtn );
if (dtn == 0 || dtn == 1)
{
// 0: Grid point data - simple packing
// 1: Matrix values - simple packing
simpleUnpacking(raf, gds, drs, bms);
}
else if (dtn == 2)
{
// 2:Grid point data - complex packing
complexUnpacking(raf, gds, drs);
}
else if (dtn == 3)
{
// 3: complex packing with spatial differencing
complexUnpackingWithSpatial(raf, gds, drs);
}
else if (dtn == 40 || dtn == 40000)
{
// JPEG 2000 Stream Format
jpeg2000Unpacking(raf, gds, drs, bms);
}
} // end Grib2DataSection
} // end Grib2DataSection
/// <summary> simple Unpacking method for Grib2 data.</summary>
/// <param name="raf">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">
/// </param>
/// <throws> IOException </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
private void simpleUnpacking(System.IO.FileStream raf, Grib2GridDefinitionSection gds, Grib2DataRepresentationSection drs, Grib2BitMapSection bms)
{
int dtn = drs.DataTemplateNumber;
//System.out.println( "DS dtn=" + dtn );
if (dtn == 1)
{
// Matrix values
System.Console.Out.WriteLine("DS Matrix values not supported yet");
return;
}
// dataPoints are number of points encoded, it could be less than the
// numberPoints in the grid record if bitMap is used, otherwise equal
int dataPoints = drs.DataPoints;
//System.out.println( "DS DRS dataPoints=" + drs.getDataPoints() );
float pmv = drs.PrimaryMissingValue;
//System.out.println( "DS pmv=" + pmv );
int nb = drs.NumberOfBits;
//System.out.println( "DS nb=" + nb );
int D = drs.DecimalScaleFactor;
//System.out.println( "DS D=" + D );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float DD = (float)System.Math.Pow((double)10, (double)D);
//System.out.println( "DS DD=" + DD );
float R = drs.ReferenceValue;
//System.out.println( "DS R=" + R );
int E = drs.BinaryScaleFactor;
//System.out.println( "DS E=" + E );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float EE = (float)System.Math.Pow((double)2.0, (double)E);
//System.out.println( "DS EE=" + EE );
int numberPoints = gds.NumberPoints;
//System.out.println( "DS GDS NumberPoints=" + gds.getNumberPoints() );
data = new float[numberPoints];
bool[] bitmap = bms.Bitmap;
// Y * 10**D = R + (X1 + X2) * 2**E
// E = binary scale factor
// D = decimal scale factor
// R = reference value
// X1 = 0
// X2 = scaled encoded value
// data[ i ] = (R + ( X1 + X2) * EE)/DD ;
if (bitmap == null)
{
for (int i = 0; i < numberPoints; i++)
{
//data[ i ] = (R + ( X1 + X2) * EE)/DD ;
data[i] = (R + bits2UInt(nb, raf) * EE) / DD;
}
}
else
{
bitPos = 0;
bitBuf = 0;
for (int i = 0; i < bitmap.Length; i++)
{
if (bitmap[i])
{
//data[ i ] = (R + ( X1 + X2) * EE)/DD ;
data[i] = (R + bits2UInt(nb, raf) * EE) / DD;
}
else
{
data[i] = pmv;
}
}
}
scanMode = gds.ScanMode;
Xlength = gds.Nx; // needs some smarts for different type Grids
//scanningModeCheck();
} // end simpleUnpacking
/// <summary> simple Unpacking method for Grib2 data.</summary>
/// <param name="raf">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">
/// </param>
/// <throws> IOException </throws>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
private void simpleUnpacking(System.IO.FileStream raf, Grib2GridDefinitionSection gds, Grib2DataRepresentationSection drs, Grib2BitMapSection bms)
{
int dtn = drs.DataTemplateNumber;
//System.out.println( "DS dtn=" + dtn );
if (dtn == 1)
{
// Matrix values
System.Console.Out.WriteLine("DS Matrix values not supported yet");
return ;
}
// dataPoints are number of points encoded, it could be less than the
// numberPoints in the grid record if bitMap is used, otherwise equal
int dataPoints = drs.DataPoints;
//System.out.println( "DS DRS dataPoints=" + drs.getDataPoints() );
float pmv = drs.PrimaryMissingValue;
//System.out.println( "DS pmv=" + pmv );
int nb = drs.NumberOfBits;
//System.out.println( "DS nb=" + nb );
int D = drs.DecimalScaleFactor;
//System.out.println( "DS D=" + D );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float DD = (float) System.Math.Pow((double) 10, (double) D);
//System.out.println( "DS DD=" + DD );
float R = drs.ReferenceValue;
//System.out.println( "DS R=" + R );
int E = drs.BinaryScaleFactor;
//System.out.println( "DS E=" + E );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float EE = (float) System.Math.Pow((double) 2.0, (double) E);
//System.out.println( "DS EE=" + EE );
int numberPoints = gds.NumberPoints;
//System.out.println( "DS GDS NumberPoints=" + gds.getNumberPoints() );
data = new float[numberPoints];
bool[] bitmap = bms.Bitmap;
// Y * 10**D = R + (X1 + X2) * 2**E
// E = binary scale factor
// D = decimal scale factor
// R = reference value
// X1 = 0
// X2 = scaled encoded value
// data[ i ] = (R + ( X1 + X2) * EE)/DD ;
if (bitmap == null)
{
for (int i = 0; i < numberPoints; i++)
{
//data[ i ] = (R + ( X1 + X2) * EE)/DD ;
data[i] = (R + bits2UInt(nb, raf) * EE) / DD;
}
}
else
{
bitPos = 0;
bitBuf = 0;
for (int i = 0; i < bitmap.Length; i++)
{
if (bitmap[i])
{
//data[ i ] = (R + ( X1 + X2) * EE)/DD ;
data[i] = (R + bits2UInt(nb, raf) * EE) / DD;
}
else
{
data[i] = pmv;
}
}
}
scanMode = gds.ScanMode;
Xlength = gds.Nx; // needs some smarts for different type Grids
//scanningModeCheck();
}
/// <summary> Jpeg2000 unpacking method for Grib2 data.</summary>
/// <param name="raf">
/// </param>
/// <param name="gds">
/// </param>
/// <param name="drs">
/// </param>
/// <param name="bms">bit-map section object
/// </param>
//UPGRADE_TODO: Class 'java.io.RandomAccessFile' was converted to 'System.IO.FileStream' which has a different behavior. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1073_javaioRandomAccessFile'"
private void jpeg2000Unpacking(System.IO.FileStream raf, Grib2GridDefinitionSection gds, Grib2DataRepresentationSection drs, Grib2BitMapSection bms)
{
// 6-xx jpeg2000 data block to decode
// dataPoints are number of points encoded, it could be less than the
// numberPoints in the grid record if bitMap is used, otherwise equal
int dataPoints = drs.DataPoints;
//System.out.println( "DS DRS dataPoints=" + drs.getDataPoints() );
//System.out.println( "DS length=" + length );
float pmv = drs.PrimaryMissingValue;
//System.out.println( "DS pmv=" + pmv );
int nb = drs.NumberOfBits;
//System.out.println( "DS nb = " + nb );
int D = drs.DecimalScaleFactor;
//System.out.println( "DS D=" + D );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float DD = (float) System.Math.Pow((double) 10, (double) D);
//System.out.println( "DS DD=" + DD );
float R = drs.ReferenceValue;
//System.out.println( "DS R=" + R );
int E = drs.BinaryScaleFactor;
//System.out.println( "DS E=" + E );
//UPGRADE_WARNING: Data types in Visual C# might be different. Verify the accuracy of narrowing conversions. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1042'"
float EE = (float) System.Math.Pow((double) 2.0, (double) E);
//System.out.println( "DS EE=" + EE );
/*Grib2JpegDecoder g2j = null;
if (nb != 0)
{
// there's data to decode
System.String[] argv = new System.String[4];
argv[0] = "-rate";
argv[1] = System.Convert.ToString(nb);
argv[2] = "-verbose";
argv[3] = "off";
//argv[ 2 ] = "-nocolorspace" ;
//argv[ 3 ] = "-Rno_roi" ;
//argv[ 4 ] = "-cdstr_info" ;
//argv[ 5 ] = "-verbose" ;
//argv[ 6 ] = "-debug" ;
g2j = new Grib2JpegDecoder(argv);
g2j.decode(raf, length - 5);
}
*/
Jpeg2000Decoder decoder = new Jpeg2000Decoder();
byte[] buf = new byte[length-5];
// TODO Check cast
int res = raf.Read(buf, 0, length-5);
int[] values = null;
if( res == length-5 )
{
values = decoder.Decode(buf, dataPoints);
}
else
{
// TODO Error handling
}
int numberPoints = gds.NumberPoints;
//System.out.println( "DS GDS NumberPoints=" + gds.getNumberPoints() );
data = new float[numberPoints];
bool[] bitmap = bms.Bitmap;
if (bitmap == null)
{
if (nb == 0)
{
// no data decoded, set to primaryMissingValue
for (int i = 0; i < numberPoints; i++)
{
data[i] = pmv;
}
}
else
{
//System.out.println( "DS jpeg data length ="+ g2j.data.length );
// record has missing bitmap
if (values.Length != numberPoints)
{
data = null;
return ;
}
for (int i = 0; i < numberPoints; i++)
{
//Y = (R + ( 0 + X2) * EE)/DD ;
data[i] = (R + values[i] * EE) / DD;
//System.out.println( "DS data[ " + i +" ]=" + data[ i ] );
}
}
}
else
{
for (int i = 0, j = 0; i < bitmap.Length; i++)
{
if (bitmap[i])
{
data[i] = (R + values[j++] * EE) / DD;
}
else
{
data[i] = pmv;
}
}
}
scanMode = gds.ScanMode;
scanningModeCheck();
}