Application: gvSIG desktop

import es.gva.cit.jecwcompress.*;

import es.gva.cit.jgdal.*;

public class EcwBandasLandsat{

        public static void Uso(){

                System.out.println("Uso 1: Comprime una ventana de la imagen.");

                System.out.println("        java TifToEcw file-src file-dst compresi?n num_bandas(3 ? 5)");

        }

        public static void main(String[] args){

          Gdal[] gdalimgs=null;

          int nbandas=0;

          NCSEcwCompressClient client;

          ReadImgs lectura=null;

          String[] images;

          if(args.length != 3){

                  EcwBandasLandsat.Uso();

                  return;

          }

          nbandas = Integer.parseInt(args[2]);

          if(nbandas!=3 && nbandas!=6){

                  EcwBandasLandsat.Uso();

                  return;

          }

            images=new String[nbandas];

            gdalimgs =new Gdal[nbandas];

            for(int i=0;i<nbandas;i++)gdalimgs[i]=new Gdal();

          if(nbandas==6){

                  for(int i=0;i<nbandas-1;i++)

                          images[i] = new String(args[0]+(i+1)+"0.tif");

              images[5] = new String(args[0]+"70.tif");

          }else if(nbandas==3){

                  images[0] = new String(args[0]+"30.tif");

                  images[1] = new String(args[0]+"20.tif");

                  images[2] = new String(args[0]+"10.tif");

          }

          try{

                for(int i=0;i<nbandas;i++){

                          gdalimgs[i].open(images[i],Gdal.GA_ReadOnly);

                          System.out.println(images[i]);

                  }

          }catch(Exception ge){

                ge.printStackTrace();

                //...........

          }

          GdalRasterBand mirasterband=null;

          String st;

          int nxsize=0;

          int nysize=0;

          int widthcompress = 0;

          int heightcompress = 0;

          int rastercount=nbandas;

          String rasterband;

          GeoTransform gt=null;

          try{

            nxsize = gdalimgs[0].getRasterXSize();

            nysize = gdalimgs[0].getRasterYSize();

            System.out.println("N BANDAS="+rastercount+" SIZEX="+nxsize+" SIZEY="+nysize);

          }catch(GdalException ge){

                                                          ge.printStackTrace();

                                                          //...........

                                                     }

          widthcompress = nxsize;

          heightcompress = nysize;

          try{

                  gt = gdalimgs[0].getGeoTransform();

                  System.out.println("Origins = ("+gt.adfgeotransform[0]+","+gt.adfgeotransform[3]+")");

                  System.out.println("Pixel Size = ("+gt.adfgeotransform[1]+","+gt.adfgeotransform[5]+")");

          }catch(GdalException e){

                          System.out.println("No puedo obtener el array geoTransform.");

                        e.printStackTrace();

                        //...........

          }

          try{

                  client = new NCSEcwCompressClient();

                  if(nbandas==6)client.setOutputFilename(args[0]+"123457multibanda.ecw");

                  else if(nbandas==3)client.setOutputFilename(args[0]+"321multibanda.ecw");

                  client.setInputFilename("");

            client.setTargetCompress(Double.parseDouble(args[1]));

            client.setInOutSizeX(widthcompress);

            client.setInOutSizeY(heightcompress);

            client.setInputBands(rastercount);

            client.setCompressFormat(CompressFormat.COMPRESS_MULTI);

                client.setCellIncrementX(gt.adfgeotransform[1]);

                client.setCellIncrementY(gt.adfgeotransform[5]);

                client.setOriginX(gt.adfgeotransform[0]);

                client.setOriginY(gt.adfgeotransform[3]);

                client.setCellSizeUnits(1);

                lectura = new ReadImgs(gdalimgs, client, widthcompress, heightcompress, nbandas);

                client.NCSEcwCompressOpen(false);

                client.NCSEcwCompress(lectura);

                client.NCSEcwCompressClose();

          }catch(EcwException e){

                e.printStackTrace();

                //...........

          }

          try{

                   for(int i=0;i<nbandas;i++)gdalimgs[i].close();

          }catch(GdalException e){

                                                                  e.printStackTrace();

                                                           }

        }

}

/**

 *

 * Para la lectura hay que hacer una clase que extienda de JniObject e implemente ReadCallBack

 * . Esto obliga a crear un m?todo loadBuffer. En el hay que meter la funcionalidad para que

 * llene el buffer. El buffer esta en la clase cliente y tendr? una longitud de

 * ancho de una l?nea * n?mero de bandas

 */

class ReadImgs extends JniObject implements ReadCallBack {

        private GdalBuffer[] buffers;

        private GdalRasterBand mirasterband=null;

        private Gdal[] gdalimgs=null;

        private NCSEcwCompressClient client=null;

        private int width, height;

        public ReadImgs(Gdal[] g, NCSEcwCompressClient client, int width, int height, int nbandas){

                gdalimgs = g;

                this.client = client;

                this.width = width;

                this.height = height;

                buffers = new GdalBuffer[nbandas];

        }

        public void loadBuffer(){

                try{

                        for(int iBand=0;iBand<gdalimgs.length;iBand++){

                                mirasterband=gdalimgs[iBand].getRasterBand(1);

                                  buffers[iBand] = mirasterband.readRaster(0, nNextLine, width, 1, width, 1, 1);

                                  for(int pos=0; pos<width; pos++){

                                          client.buffer[pos+(width*iBand)]=buffers[iBand].buffByte[pos];

                                  }

                        }

                  }catch(GdalException e){

                          System.out.println("Error en la lectura de lineas con Gdal.");

                          System.exit(1);

                  }

        }

        public void updatePercent(){

                System.out.println(client.getPercent()+"%");

        }

}