<?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>MtasBitInputStream.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> > <a href="index.source.html" class="el_package">mtas.codec.payload</a> > <span class="el_source">MtasBitInputStream.java</span></div><h1>MtasBitInputStream.java</h1><pre class="source lang-java linenums">package mtas.codec.payload;
import java.io.ByteArrayInputStream;
import java.io.IOException;
/**
* The Class MtasBitInputStream.
*/
public class MtasBitInputStream extends ByteArrayInputStream {
/** 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 input stream.
*
* @param buf
* the buf
*/
public MtasBitInputStream(byte[] buf) {
<span class="fc" id="L24"> super(buf);</span>
<span class="fc" id="L25"> }</span>
/**
* Read bit.
*
* @return the int
* @throws IOException
* Signals that an I/O exception has occurred.
*/
public int readBit() throws IOException {
<span class="fc bfc" id="L35" title="All 2 branches covered."> if (bitCount == 0) {</span>
<span class="fc" id="L36"> bitBuffer = read();</span>
<span class="pc bpc" id="L37" title="1 of 2 branches missed."> if (bitBuffer == -1) {</span>
<span class="nc" id="L38"> throw new IOException("no more bits");</span>
}
}
<span class="fc" id="L41"> int value = (bitBuffer >> bitCount) & 1;</span>
<span class="fc" id="L42"> bitCount++;</span>
<span class="fc bfc" id="L43" title="All 2 branches covered."> if (bitCount > 7) {</span>
<span class="fc" id="L44"> bitCount = 0;</span>
}
<span class="fc" id="L46"> return value;</span>
}
/**
* Read remaining bytes.
*
* @return the byte[]
* @throws IOException
* Signals that an I/O exception has occurred.
*/
public byte[] readRemainingBytes() throws IOException {
<span class="nc bnc" id="L57" title="All 2 branches missed."> if (this.available() > 0) {</span>
<span class="nc" id="L58"> byte[] b = new byte[this.available()];</span>
<span class="nc" id="L59"> read(b);</span>
<span class="nc" id="L60"> return b;</span>
} else {
<span class="nc" id="L62"> throw new IOException("no more bytes");</span>
}
}
/**
* Read elias gamma coding integer.
*
* @return the int
* @throws IOException
* Signals that an I/O exception has occurred.
*/
public int readEliasGammaCodingInteger() throws IOException {
<span class="fc" id="L74"> int value = readEliasGammaCodingPositiveInteger();</span>
<span class="pc bpc" id="L75" title="1 of 2 branches missed."> if ((value % 2) == 0) {</span>
<span class="nc" id="L76"> return (-value) / 2;</span>
} else {
<span class="fc" id="L78"> return (value - 1) / 2; </span>
}
}
/**
* Read elias gamma coding non negative integer.
*
* @return the int
* @throws IOException
* Signals that an I/O exception has occurred.
*/
public int readEliasGammaCodingNonNegativeInteger() throws IOException {
<span class="fc" id="L90"> int value = readEliasGammaCodingPositiveInteger();</span>
<span class="fc" id="L91"> return (value - 1);</span>
}
/**
* Read elias gamma coding positive integer.
*
* @return the int
* @throws IOException
* Signals that an I/O exception has occurred.
*/
public int readEliasGammaCodingPositiveInteger() throws IOException {
int value;
<span class="fc" id="L103"> int counter = 0;</span>
<span class="fc" id="L104"> int bit = readBit();</span>
<span class="fc bfc" id="L105" title="All 2 branches covered."> while (bit == 0) {</span>
<span class="fc" id="L106"> counter++;</span>
<span class="fc" id="L107"> bit = readBit();</span>
}
<span class="fc" id="L109"> value = 1;</span>
<span class="fc bfc" id="L110" title="All 2 branches covered."> for (int i = 0; i < counter; i++) {</span>
<span class="fc" id="L111"> value = (2 * value) + readBit();</span>
}
<span class="fc" id="L113"> return value;</span>
}
}
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