List of usage examples for java.io BufferedInputStream skip
public synchronized long skip(long n) throws IOException
skip method of InputStream. From source file:Main.java
public static void main(String[] args) throws Exception { InputStream is = new FileInputStream("C:/test.txt"); // input stream is converted to buffered input stream BufferedInputStream bis = new BufferedInputStream(is); // read until a single byte is available while (bis.available() > 0) { // skip single byte from the stream bis.skip(1); // read next available byte and convert to char char c = (char) bis.read(); System.out.print(c);/* w w w. j a v a 2s. c o m*/ } }
From source file:com.guns.media.tools.yuv.MediaTool.java
/** * @param args the command line arguments *//*from www. j ava 2 s .c o m*/ public static void main(String[] args) throws IOException { try { Options options = getOptions(); CommandLine cmd = null; int offset = 0; CommandLineParser parser = new GnuParser(); cmd = parser.parse(options, args); if (cmd.hasOption("help")) { printHelp(options); exit(1); } if (cmd.hasOption("offset")) { offset = new Integer(cmd.getOptionValue("offset")); } int frame = new Integer(cmd.getOptionValue("f")); // int scale = new Integer(args[2]); BufferedInputStream if1 = new BufferedInputStream(new FileInputStream(cmd.getOptionValue("if1"))); BufferedInputStream if2 = new BufferedInputStream(new FileInputStream(cmd.getOptionValue("if2"))); DataStorage.create(new Integer(cmd.getOptionValue("f"))); int width = new Integer(cmd.getOptionValue("w")); int height = new Integer(cmd.getOptionValue("h")); LookUp.initSSYUV(width, height); // int[][] frame1 = new int[width][height]; // int[][] frame2 = new int[width][height]; int nRead; int fRead; byte[] data = new byte[width * height + ((width * height) / 2)]; byte[] data1 = new byte[width * height + ((width * height) / 2)]; int frames = 0; long start_ms = System.currentTimeMillis() / 1000L; long end_ms = start_ms; if (offset > 0) { if1.skip(((width * height + ((width * height) / 2)) * offset)); } else if (offset < 0) { if2.skip(((width * height + ((width * height) / 2)) * (-1 * offset))); } if (cmd.hasOption("psnr")) { ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool(); while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1) && frames < frame) { byte[] data_out = data.clone(); byte[] data1_out = data1.clone(); PSNRCalculatorThread wt = new PSNRCalculatorThread(data_out, data1_out, frames, width, height); executor.execute(wt); frames++; } executor.shutdown(); end_ms = System.currentTimeMillis(); System.out.println("Frame Rate :" + frames * 1000 / ((end_ms - start_ms))); for (int i = 0; i < frames; i++) { System.out.println( i + "," + 10 * Math.log10((255 * 255) / (DataStorage.getFrame(i) / (width * height)))); } } if (cmd.hasOption("sub")) { RandomAccessFile raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw"); ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool(); while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1)) { byte[] data_out = data.clone(); byte[] data1_out = data1.clone(); ImageSubstractThread wt = new ImageSubstractThread(data_out, data1_out, frames, width, height, raf); //wt.run(); executor.execute(wt); frames++; } executor.shutdown(); end_ms = System.currentTimeMillis() / 1000L; System.out.println("Frame Rate :" + frames / ((end_ms - start_ms))); raf.close(); } if (cmd.hasOption("ss") && !cmd.getOptionValue("o").matches("-")) { RandomAccessFile raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw"); // RandomAccessFile ra = new RandomAccessFile(cmd.getOptionValue("o"), "rw"); // MappedByteBuffer raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, ((width*height)+(width*height/2))*frame); ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool(); while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1) && frames < frame) { byte[] data_out = data.clone(); byte[] data1_out = data1.clone(); SidebySideImageThread wt = new SidebySideImageThread(data_out, data1_out, frames, width, height, raf); // MPSidebySideImageThread wt = new MPSidebySideImageThread(data_out, data1_out, frames, width, height, ra); frames++; // wt.run(); executor.execute(wt); } executor.shutdown(); end_ms = System.currentTimeMillis() / 1000L; while (!executor.isTerminated()) { } raf.close(); } if (cmd.hasOption("ss") && cmd.getOptionValue("o").matches("-")) { PrintStream stdout = new PrintStream(System.out); // RandomAccessFile ra = new RandomAccessFile(cmd.getOptionValue("o"), "rw"); // MappedByteBuffer raf = new RandomAccessFile(cmd.getOptionValue("o"), "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, ((width*height)+(width*height/2))*frame); // ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool(); while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1) && frames < frame) { byte[] data_out = data.clone(); byte[] data1_out = data1.clone(); SidebySideImageThread wt = new SidebySideImageThread(data_out, data1_out, frames, width, height, stdout); // MPSidebySideImageThread wt = new MPSidebySideImageThread(data_out, data1_out, frames, width, height, ra); frames++; // wt.run(); wt.run(); } end_ms = System.currentTimeMillis() / 1000L; System.out.println("Frame Rate :" + frames / ((end_ms - start_ms))); stdout.close(); } if (cmd.hasOption("image")) { System.setProperty("java.awt.headless", "true"); //ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newCachedThreadPool(); ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(10); while ((nRead = if1.read(data)) != -1 && ((fRead = if2.read(data1)) != -1)) { if (frames == frame) { byte[] data_out = data.clone(); byte[] data1_out = data1.clone(); Frame f1 = new Frame(data_out, width, height, Frame.YUV420); Frame f2 = new Frame(data1_out, width, height, Frame.YUV420); // System.out.println(cmd.getOptionValue("o")); ExtractImageThread wt = new ExtractImageThread(f1, frames, cmd.getOptionValue("if1") + "frame1-" + cmd.getOptionValue("o")); ExtractImageThread wt1 = new ExtractImageThread(f2, frames, cmd.getOptionValue("if2") + "frame2-" + cmd.getOptionValue("o")); // executor.execute(wt); executor.execute(wt); executor.execute(wt1); } frames++; } executor.shutdown(); // executor.shutdown(); end_ms = System.currentTimeMillis() / 1000L; System.out.println("Frame Rate :" + frames / ((end_ms - start_ms))); } } catch (ParseException ex) { Logger.getLogger(MediaTool.class.getName()).log(Level.SEVERE, null, ex); } }
From source file:eu.scape_project.arc2warc.utils.ArcUtils.java
/** * Read the ARC record content into a byte array. Note that the record * content can be only read once, it is "consumed" afterwards. * * @param arcRecord ARC record./*w ww . j ava 2 s . c o m*/ * @return Content byte array. * @throws IOException If content is too large to be stored in a byte array. */ public static byte[] arcRecordPayloadToByteArray(ARCRecord arcRecord) throws IOException { // Byte point where the content of the ARC record begins int contentBegin = (int) arcRecord.getMetaData().getContentBegin(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); BufferedInputStream buffis = new BufferedInputStream(arcRecord); BufferedOutputStream buffos = new BufferedOutputStream(baos); byte[] tempBuffer = new byte[BUFFER_SIZE]; int bytesRead; // skip header content buffis.skip(contentBegin); while ((bytesRead = buffis.read(tempBuffer)) != -1) { buffos.write(tempBuffer, 0, bytesRead); } buffis.close(); buffos.flush(); buffos.close(); return baos.toByteArray(); }
From source file:eu.scape_project.spacip.ContainerProcessing.java
/** * Write ARC record content to output stream * * @param nativeArchiveRecord/*from w ww . j a va 2 s. c o m*/ * @param outputStream Output stream * @throws IOException */ public static void recordToOutputStream(ArchiveRecord nativeArchiveRecord, OutputStream outputStream) throws IOException { ARCRecord arcRecord = (ARCRecord) nativeArchiveRecord; ARCRecordMetaData metaData = arcRecord.getMetaData(); long contentBegin = metaData.getContentBegin(); BufferedInputStream bis = new BufferedInputStream(arcRecord); BufferedOutputStream bos = new BufferedOutputStream(outputStream); byte[] tempBuffer = new byte[BUFFER_SIZE]; int bytesRead; // skip record header bis.skip(contentBegin); while ((bytesRead = bis.read(tempBuffer)) != -1) { bos.write(tempBuffer, 0, bytesRead); } bos.flush(); bis.close(); bos.close(); }
From source file:com.sangupta.jerry.util.FileUtils.java
/** * Dump a given file into HEX starting at given offset and reading given number of rows where * a row consists of 16-bytes./*from w ww.ja v a 2 s .com*/ * * @param out * @param file * @param offset * @param maxRows * @throws IOException */ public static void hexDump(PrintStream out, File file, long offset, int maxRows) throws IOException { InputStream is = null; BufferedInputStream bis = null; try { is = new FileInputStream(file); bis = new BufferedInputStream(is); bis.skip(offset); int row = 0; if (maxRows == 0) { maxRows = Integer.MAX_VALUE; } StringBuilder builder1 = new StringBuilder(100); StringBuilder builder2 = new StringBuilder(100); while (bis.available() > 0) { out.printf("%04X ", row * 16); for (int j = 0; j < 16; j++) { if (bis.available() > 0) { int value = (int) bis.read(); builder1.append(String.format("%02X ", value)); if (!Character.isISOControl(value)) { builder2.append((char) value); } else { builder2.append("."); } } else { for (; j < 16; j++) { builder1.append(" "); } } } out.print(builder1); out.println(builder2); row++; if (row > maxRows) { break; } builder1.setLength(0); builder2.setLength(0); } } finally { IOUtils.closeQuietly(bis); IOUtils.closeQuietly(is); } }
From source file:com.openedit.generators.FileGenerator.java
protected InputStream streamBinary(WebPageRequest inReq, Page inPage, InputStream in, long start, long end, long length, Output inOut) throws IOException { OutputStream outs = inOut.getStream(); if (start > -1) { BufferedInputStream buffer = new BufferedInputStream(in); long did = buffer.skip(start); if (did != start) { throw new OpenEditException("Could not seek to start"); }/* w ww . j a v a 2 s. c o m*/ in = buffer; } if (end != -1) { getOutputFiller().fill(in, outs, length); } else { getOutputFiller().fill(in, outs); } return in; }
From source file:co.cask.hydrator.plugin.batch.CopybookRecordReader.java
@Override public void initialize(InputSplit split, TaskAttemptContext context) throws IOException, InterruptedException { // Get configuration Configuration conf = context.getConfiguration(); int fileStructure = net.sf.JRecord.Common.Constants.IO_FIXED_LENGTH; Path path = new Path(conf.get(CopybookInputFormat.COPYBOOK_INPUTFORMAT_DATA_HDFS_PATH)); FileSystem fs = FileSystem.get(path.toUri(), conf); // Create input stream for the COBOL copybook contents InputStream inputStream = IOUtils .toInputStream(conf.get(CopybookInputFormat.COPYBOOK_INPUTFORMAT_CBL_CONTENTS), "UTF-8"); BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream); try {/*from w w w . j a v a2 s .c o m*/ externalRecord = CopybookIOUtils.getExternalRecord(bufferedInputStream); recordByteLength = CopybookIOUtils.getRecordLength(externalRecord, fileStructure); LineProvider lineProvider = LineIOProvider.getInstance().getLineProvider(fileStructure, CopybookIOUtils.FONT); reader = LineIOProvider.getInstance().getLineReader(fileStructure, lineProvider); LayoutDetail copybook = CopybookIOUtils.getLayoutDetail(externalRecord); org.apache.hadoop.mapreduce.lib.input.FileSplit fileSplit = (org.apache.hadoop.mapreduce.lib.input.FileSplit) split; start = fileSplit.getStart(); end = start + fileSplit.getLength(); BufferedInputStream fileIn = new BufferedInputStream(fs.open(fileSplit.getPath())); // Jump to the point in the split at which the first complete record of the split starts, // if not the first InputSplit if (start != 0) { position = start - (start % recordByteLength) + recordByteLength; fileIn.skip(position); } reader.open(fileIn, copybook); } catch (Exception e) { throw new RuntimeException(e); } }
From source file:Hash.Hash.java
private static long startOfScanJPG(BufferedInputStream in) throws IOException { int c;//from w ww .j a va 2 s .c om long j = startOfImageJPG(in); if (j == -1) return -1; Boolean marker = false; while ((c = in.read()) != -1) { if (marker) //Not a marker(byte stuffing), shouldn't happen in header if (c == 0/* || c==216*/) marker = false; //Start of Quantization table, practically the image //Didn't work else if (c == 219) return j; //Start of Scan else if (c == 0xDA /*218*/) return j; else { // System.out.print("ff" + Integer.toHexString(c) + " "); long jump = 256 * in.read() + in.read() - 2; // System.out.println(Long.toHexString(jump)); do { long skip = in.skip(jump); if (skip < 0) return -1; jump -= skip; } while (jump > 0); j += jump + 2; marker = false; } else { if (c == 0xFF/*255*/) { marker = true; // } else if (c == 0) {//byte stuffing } else { return -1; } } j++; } return -1; }
From source file:edu.ucsb.eucalyptus.storage.fs.FileSystemStorageManager.java
public int readObject(String path, byte[] bytes, long offset) throws IOException { File objectFile = new File(path); if (!objectFile.exists()) { throw new IOException("Unable to read: " + path); }//from w ww . java2 s .c om BufferedInputStream inputStream = null; int bytesRead = 0; try { inputStream = new BufferedInputStream(new FileInputStream(objectFile)); if (offset > 0) { inputStream.skip(offset); } bytesRead = inputStream.read(bytes); } finally { if (inputStream != null) inputStream.close(); } return bytesRead; }
From source file:io.minio.MinioClient.java
/** * Skips data of up to given length in given input stream. * * @param inputStream Input stream which is intance of {@link RandomAccessFile} or {@link BufferedInputStream}. * @param n Length of bytes to skip. */// ww w . j av a2 s .c om private void skipStream(Object inputStream, long n) throws IOException, InsufficientDataException { RandomAccessFile file = null; BufferedInputStream stream = null; if (inputStream instanceof RandomAccessFile) { file = (RandomAccessFile) inputStream; } else if (inputStream instanceof BufferedInputStream) { stream = (BufferedInputStream) inputStream; } else { throw new IllegalArgumentException("unsupported input stream object"); } if (file != null) { file.seek(file.getFilePointer() + n); return; } long bytesSkipped; long totalBytesSkipped = 0; while ((bytesSkipped = stream.skip(n - totalBytesSkipped)) >= 0) { totalBytesSkipped += bytesSkipped; if (totalBytesSkipped == n) { return; } } throw new InsufficientDataException( "Insufficient data. bytes skipped " + totalBytesSkipped + " expected " + n); }