satellite.mcidas decoder native support for UNIWISC PNG-compressed products
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mjames-upc
parent
3e4b613578
commit
ad45838f9a
3 changed files with 72 additions and 39 deletions
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@ -11,7 +11,8 @@ Require-Bundle: com.raytheon.edex.common,
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javax.persistence,
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com.raytheon.uf.common.dataplugin.satellite;bundle-version="1.0.0",
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com.raytheon.edex.plugin.satellite;bundle-version="1.12.1174",
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org.apache.commons.codec;bundle-version="1.10.0"
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org.apache.commons.codec;bundle-version="1.10.0",
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ar.com.hjg.pngj;bundle-version="2.1.1"
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Bundle-RequiredExecutionEnvironment: JavaSE-1.7
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Import-Package: com.raytheon.uf.common.localization,
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com.raytheon.uf.common.menus,
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@ -19,9 +19,13 @@
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**/
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package com.raytheon.uf.edex.plugin.satellite.mcidas;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.InputStream;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.charset.Charset;
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import java.util.Arrays;
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import java.util.Calendar;
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import java.util.GregorianCalendar;
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import java.util.TimeZone;
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@ -29,8 +33,12 @@ import java.util.TimeZone;
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import org.apache.commons.codec.binary.Base64;
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import org.opengis.referencing.crs.ProjectedCRS;
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import ar.com.hjg.pngj.ImageLineByte;
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import ar.com.hjg.pngj.PngReaderByte;
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import com.raytheon.edex.esb.Headers;
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import com.raytheon.edex.exception.DecoderException;
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import com.raytheon.edex.plugin.satellite.SatelliteDecoderException;
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import com.raytheon.edex.util.satellite.SatSpatialFactory;
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import com.raytheon.uf.common.dataplugin.PluginDataObject;
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import com.raytheon.uf.common.dataplugin.satellite.SatMapCoverage;
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@ -79,6 +87,7 @@ import com.raytheon.uf.edex.plugin.satellite.mcidas.util.McidasSatelliteLookups.
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* 05/19/2015 ---- mjames@ucar Added decoding of GVAR native projection products
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* 07/12/2015 ---- mjames@ucar Account for GOES E and W UNIWISC AREA file numbers
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* 01/21/2016 ---- mjames@ucar Cleanup
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* 10/24/2017 ---- mjames@ucar Native support for PNG-compressed AREA files.
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* </pre>
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*
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* @author
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@ -99,6 +108,10 @@ public class McidasSatelliteDecoder {
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final int SIZE_OF_AREA = 256;
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final int PNG_HEADER_LENGTH = 240;
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private final byte[] PNG_HDR = { -119, 80, 78, 71 };
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private static final double HALFPI = Math.PI / 2.;
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private static final double RTD = 180. / Math.PI;
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@ -144,7 +157,6 @@ public class McidasSatelliteDecoder {
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*/
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private PluginDataObject[] decodeMcidasArea(byte[] data) throws Exception {
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byte[] area = null;
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byte[] nonAreaBlock = new byte[data.length - SIZE_OF_AREA];
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area = new byte[SIZE_OF_AREA];
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@ -230,21 +242,13 @@ public class McidasSatelliteDecoder {
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navsize = calibrationOffset - navBlockOffset;
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}
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byte[] navigation = new byte[navsize];
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byte[] nonNavBlock = new byte[nonAreaBlock.length - navsize];
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System.arraycopy(nonAreaBlock, 0, navigation, 0, navsize);
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/* mjames@ucar
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* bandMap1to32 is a 32-bit filter band map for multichannel images.
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* if a bit is set, data exists for the band; band 1 is the least
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* significant byte (rightmost)
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*
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* Example: for GVAR GEWCOMP UNIWISC image,
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* bandMap1to32 = 4
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* bandMap33to64 = -1, so
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* nBands = 1
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* bandBitsCount = 33
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*
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* this is a problem...
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*/
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System.arraycopy(nonAreaBlock, navsize, nonNavBlock, 0, nonNavBlock.length);
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byte[] pngBlock = new byte[nonNavBlock.length - PNG_HEADER_LENGTH];
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System.arraycopy(nonNavBlock, PNG_HEADER_LENGTH, pngBlock, 0, pngBlock.length);
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long bandBits = ((long) bandMap33to64 << 32) | bandMap1to32;
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long bandBitsCount = Long.bitCount(bandBits);
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if (nBands != bandBitsCount && nBands > 1) {
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@ -281,11 +285,16 @@ public class McidasSatelliteDecoder {
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// TODO: Line pad if not a multiple of four bytes
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if ((linePrefixLength == 0) && (nBytesPerElement == 1)
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&& (nBands == 1)) {
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byte[] imageBytes = new byte[nLines * nElementsPerLine];
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buf.position(dataBlockOffset);
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buf.get(imageBytes);
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rec.setMessageData(imageBytes);
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if (isPngCompressed(pngBlock)) {
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byte[] pngBytes = decompressPngSatellite(pngBlock);
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rec.setMessageData(pngBytes);
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} else {
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byte[] imageBytes = new byte[nLines * nElementsPerLine];
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buf.position(dataBlockOffset);
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buf.get(imageBytes);
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rec.setMessageData(imageBytes);
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}
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} else if (nBytesPerElement == 1) {
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byte[] imageBytes = new byte[nLines * nElementsPerLine];
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@ -328,6 +337,47 @@ public class McidasSatelliteDecoder {
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return result;
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}
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/**
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* Method to check if file is PNG-compressed.
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*
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* @param messageData
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* @return
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*/
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private boolean isPngCompressed(byte[] messageData) {
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byte[] buffer = new byte[4];
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System.arraycopy(messageData, 0, buffer, 0, buffer.length);
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boolean compressed = Arrays.equals(buffer, PNG_HDR);
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return compressed;
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}
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/**
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* Method to handle Unidata PNG compressed satellite data.
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*
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* @param messageData
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* @return
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* @throws DecoderException
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*/
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private byte[] decompressPngSatellite(byte[] messageData)
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throws SatelliteDecoderException {
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InputStream stream = new ByteArrayInputStream(messageData);
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PngReaderByte png = new PngReaderByte(stream);
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int MAX_IMAGE_SIZE = 30000000;
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ByteArrayOutputStream bos = new ByteArrayOutputStream(MAX_IMAGE_SIZE);
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byte[] inflated = null;
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for (int row=0;row< png.getImgInfo().rows;row++){
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ImageLineByte line = png.readRowByte();
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byte [] buf = line.getScanlineByte();
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bos.write(buf, 0, buf.length);
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}
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inflated = bos.toByteArray();
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bos = null;
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return inflated;
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}
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/**
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* Reference:
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* http://www.ssec.wisc.edu/mcidas/doc/prog_man/2006/formats-13a.html
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@ -1,24 +1,6 @@
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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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<!--
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This_software_was_developed_and_/_or_modified_by_Raytheon_Company,
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pursuant_to_Contract_DG133W-05-CQ-1067_with_the_US_Government.
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U.S._EXPORT_CONTROLLED_TECHNICAL_DATA
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This_software_product_contains_export-restricted_data_whose
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export/transfer/disclosure_is_restricted_by_U.S._law._Dissemination
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to_non-U.S._persons_whether_in_the_United_States_or_abroad_requires
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an_export_license_or_other_authorization.
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Contractor_Name:________Raytheon_Company
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Contractor_Address:_____6825_Pine_Street,_Suite_340
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________________________Mail_Stop_B8
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________________________Omaha,_NE_68106
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________________________402.291.0100
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See_the_AWIPS_II_Master_Rights_File_("Master_Rights_File.pdf")_for
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further_licensing_information.
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-->
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<requestPatterns xmlns:ns2="group">
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<regex>AREA[0-9]{4}.*</regex>
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<regex>pnga2area</regex>
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<regex>.*uniwisc.*</regex>
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</requestPatterns>
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