MtasBitOutputStream.java.html 5.31 KB
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml" lang="en"><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/><link rel="stylesheet" href="../.resources/report.css" type="text/css"/><link rel="shortcut icon" href="../.resources/report.gif" type="image/gif"/><title>MtasBitOutputStream.java</title><link rel="stylesheet" href="../.resources/prettify.css" type="text/css"/><script type="text/javascript" src="../.resources/prettify.js"></script></head><body onload="window['PR_TAB_WIDTH']=4;prettyPrint()"><div class="breadcrumb" id="breadcrumb"><span class="info"><a href="../.sessions.html" class="el_session">Sessions</a></span><a href="../index.html" class="el_report">MTAS</a> &gt; <a href="index.source.html" class="el_package">mtas.codec.payload</a> &gt; <span class="el_source">MtasBitOutputStream.java</span></div><h1>MtasBitOutputStream.java</h1><pre class="source lang-java linenums">package mtas.codec.payload;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * The Class MtasBitOutputStream.
 */
public class MtasBitOutputStream extends ByteArrayOutputStream {

  /** The bit buffer. */
<span class="fc" id="L12">  private int bitBuffer = 0;</span>

  /** The bit count. */
<span class="fc" id="L15">  private int bitCount = 0;</span>

  /**
   * Instantiates a new mtas bit output stream.
   */
<span class="fc" id="L20">  public MtasBitOutputStream() {</span>
<span class="fc" id="L21">  }</span>

  /**
   * Write bit.
   *
   * @param value
   *          the value
   * @throws IOException
   *           Signals that an I/O exception has occurred.
   */
  public void writeBit(int value) throws IOException {
<span class="fc" id="L32">    writeBit(value, 1);</span>
<span class="fc" id="L33">  }</span>

  /**
   * Write bit.
   *
   * @param value
   *          the value
   * @param number
   *          the number
   * @throws IOException
   *           Signals that an I/O exception has occurred.
   */
  public void writeBit(int value, int number) throws IOException {
<span class="fc bfc" id="L46" title="All 2 branches covered.">    while (number &gt; 0) {</span>
<span class="fc" id="L47">      number--;</span>
<span class="fc" id="L48">      bitBuffer |= ((value &amp; 1) &lt;&lt; bitCount++);</span>
<span class="fc bfc" id="L49" title="All 2 branches covered.">      if (bitCount == 8) {</span>
<span class="fc" id="L50">        createByte();</span>
      }
    }
<span class="fc" id="L53">  }</span>

  /**
   * Write elias gamma coding integer.
   *
   * @param value
   *          the value
   * @throws IOException
   *           Signals that an I/O exception has occurred.
   */
  public void writeEliasGammaCodingInteger(int value) throws IOException {
<span class="pc bpc" id="L64" title="1 of 2 branches missed.">    if (value &gt;= 0) {</span>
<span class="fc" id="L65">      writeEliasGammaCodingPositiveInteger(2 * value + 1);</span>
    } else {
<span class="nc" id="L67">      writeEliasGammaCodingPositiveInteger(-2 * value);</span>
    }
<span class="fc" id="L69">  }</span>

  /**
   * Write elias gamma coding non negative integer.
   *
   * @param value
   *          the value
   * @throws IOException
   *           Signals that an I/O exception has occurred.
   */
  public void writeEliasGammaCodingNonNegativeInteger(int value)
      throws IOException {
<span class="pc bpc" id="L81" title="1 of 2 branches missed.">    if (value &gt;= 0) {</span>
<span class="fc" id="L82">      writeEliasGammaCodingPositiveInteger(value + 1);</span>
    }
<span class="fc" id="L84">  }</span>

  /**
   * Write elias gamma coding positive integer.
   *
   * @param value
   *          the value
   * @throws IOException
   *           Signals that an I/O exception has occurred.
   */
  public void writeEliasGammaCodingPositiveInteger(int value)
      throws IOException {
<span class="pc bpc" id="L96" title="1 of 2 branches missed.">    if (value &gt; 0) {</span>
<span class="fc bfc" id="L97" title="All 2 branches covered.">      if (value == 1) {</span>
<span class="fc" id="L98">        writeBit(1);</span>
      } else {
<span class="fc" id="L100">        writeBit(0);</span>
<span class="fc" id="L101">        writeEliasGammaCodingPositiveInteger(value / 2);</span>
<span class="fc" id="L102">        writeBit(value % 2);</span>
      }
    }
<span class="fc" id="L105">  }</span>

  /*
   * (non-Javadoc)
   * 
   * @see java.io.ByteArrayOutputStream#close()
   */
  @Override
  public void close() throws IOException {
<span class="nc" id="L114">    createByte();</span>
<span class="nc" id="L115">    super.close();</span>
<span class="nc" id="L116">  }</span>

  /**
   * Creates the byte.
   *
   * @throws IOException
   *           Signals that an I/O exception has occurred.
   */
  public void createByte() throws IOException {
<span class="fc bfc" id="L125" title="All 2 branches covered.">    if (bitCount &gt; 0) {</span>
<span class="fc" id="L126">      bitCount = 0;</span>
<span class="fc" id="L127">      write(bitBuffer);</span>
<span class="fc" id="L128">      bitBuffer = 0;</span>
    }
<span class="fc" id="L130">  }</span>
}
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