m2.enlarge-your-data/src/rle2/eydrle2_compress.cpp

#include "eydrle2.hh"

namespace EydTools {
	void EydRle2::compress(){
		EydLib::BitGroup data;

		EydLib::BitReader bitread(_cellsize, 256); // on lit bit <20> bit expres
		bitread.open(_input_file);

		EydLib::BitWriter bitwrite(_cellsize,256); 
		bitwrite.open(_output_file);
		unsigned char c = (unsigned char)_cellsize;
		bitwrite.writeDirect(&c, 1);

		EydLib::BitCompressorRle2 compressor(_cellsize);

		printf("File opened\n");

		bool done=false;
		std::vector<EydLib::BitGroup> record;
		while(!done){
			try{
				data = bitread.read();
				compressor.append(data);

				if (compressor.hasContent()){
					std::list<EydLib::BitGroup> compressedData = compressor.flush();
					std::list<EydLib::BitGroup>::iterator cmpDataIt;
					for(cmpDataIt = compressedData.begin();
							cmpDataIt != compressedData.end();
							cmpDataIt++){
						bitwrite.write((*cmpDataIt)); // cellule
					}
				}
			} catch (EydLib::eBitReaderEndOfFile& e) {
				done = true;		
				// on flushe le contenu de record
				compressor.forceFlush();
				std::list<EydLib::BitGroup> compressedData = compressor.flush();
				std::list<EydLib::BitGroup>::iterator cmpDataIt;
				for(cmpDataIt = compressedData.begin();
						cmpDataIt != compressedData.end();
						cmpDataIt++){
					bitwrite.write((*cmpDataIt)); // cellule
				}
			}
		}
		printf("compression done\n");

		bitread.close();
		bitwrite.close();

		printf("file closed\n");
		printf("Compression ratio : %f\n", compressor.getRatio());
	}
}