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<a href="JpegFile_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * steghide 0.5.1 - a steganography program</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at></span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This program is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * modify it under the terms of the GNU General Public License</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * as published by the Free Software Foundation; either version 2</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * GNU General Public License for more details.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * along with this program; if not, write to the Free Software</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef SH_JPEGFILE_H</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span><span class="preprocessor">#define SH_JPEGFILE_H</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "<a class="code" href="common_8h.html">common.h</a>"</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#ifdef USE_LIBJPEG</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <vector></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <jpeglib.h></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> }</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">class </span><a class="code" href="classBinaryIO.html">BinaryIO</a> ;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include "<a class="code" href="CvrStgFile_8h.html">CvrStgFile.h</a>"</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="keyword">class </span><a class="code" href="classSampleValue.html">SampleValue</a> ;</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">class </span>JpegFile : <span class="keyword">public</span> <a class="code" href="classCvrStgFile.html">CvrStgFile</a> {</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  JpegFile (<a class="code" href="classBinaryIO.html">BinaryIO</a>* io) ;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  ~JpegFile (<span class="keywordtype">void</span>) ;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">void</span> <a class="code" href="classCvrStgFile.html#a8a568ccb2ad5d6c178f764dca6090908">read</a> (<a class="code" href="classBinaryIO.html">BinaryIO</a>* io) ;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordtype">void</span> <a class="code" href="classCvrStgFile.html#af2b8f47f83f9210409af6be7d750a841">write</a> (<span class="keywordtype">void</span>) ;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  std::list<CvrStgFile::Property> <a class="code" href="classCvrStgFile.html#afe2f570ea6447c0636093b44ff7793cc">getProperties</a> (<span class="keywordtype">void</span>) <span class="keyword">const</span> ;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  std::vector<MatchingAlgorithm*> <a class="code" href="classCvrStgFile.html#ad8cf6e0ba364c9d84e8321dbd68c3f26">getMatchingAlgorithms</a> (<a class="code" href="classGraph.html">Graph</a>* g, <a class="code" href="classMatching.html">Matching</a>* m) <span class="keyword">const</span> ;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <a class="code" href="classCvrStgObject.html#a80ae8f095b66683e5207adf8ff8265b4">getNumSamples</a> (<span class="keywordtype">void</span>) <span class="keyword">const</span> ;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordtype">void</span> <a class="code" href="classCvrStgObject.html#a3068d6a9dcc1c0b8bde2f081cfde6ce5">replaceSample</a> (<span class="keyword">const</span> <a class="code" href="common_8h.html#a048401d1365616f5eef97e251096a02d">SamplePos</a> pos, <span class="keyword">const</span> <a class="code" href="classSampleValue.html">SampleValue</a>* s) ;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <a class="code" href="classSampleValue.html">SampleValue</a>* <a class="code" href="classCvrStgObject.html#ac77a8da85a4f7b53e2166e990dfaa4f2">getSampleValue</a> (<span class="keyword">const</span> <a class="code" href="common_8h.html#a048401d1365616f5eef97e251096a02d">SamplePos</a> pos) <span class="keyword">const</span> ;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="common_8h.html#acf820202f81f25eb00734eac0d7aed2d">EmbValue</a> <a class="code" href="classCvrStgFile.html#a97ee067aec9c2c52c51ed02f372c7a16">getEmbeddedValue</a> (<span class="keyword">const</span> <a class="code" href="common_8h.html#a048401d1365616f5eef97e251096a02d">SamplePos</a> pos) <span class="keyword">const</span> ;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor">#ifdef DEBUG</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"></span> std::map<SampleKey,unsigned long>* getFrequencies (<span class="keywordtype">void</span>) ;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">void</span> printFrequencies (<span class="keyword">const</span> std::map<SampleKey,unsigned long>& freqs) ;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">private</span>:</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> CoeffPerBlock = 64 ;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> SamplesPerVertex = 3 ;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="common_8h.html#a6b8592979b076e06aa233e3f586ac999">UWORD32</a> Radius = 1 ;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="common_8h.html#acf820202f81f25eb00734eac0d7aed2d">EmbValue</a> EmbValueModulus = 2 ;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">struct </span>jpeg_compress_struct CInfo ;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">struct </span>jpeg_decompress_struct DeCInfo ;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* HeightInBlocks ;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>* WidthInBlocks ;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  jvirt_barray_ptr* DctCoeffs ;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  std::vector<SWORD16> LinDctCoeffs ;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  std::vector<UWORD32> StegoIndices ;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> } ;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#endif // def USE_LIBJPEG</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#endif // ndef SH_JPEGFILE_H</span></div>
<div class="ttc" id="classGraph_html"><div class="ttname"><a href="classGraph.html">Graph</a></div><div class="ttdoc">a graph constructed from a cover file and a message to be embedded </div><div class="ttdef"><b>Definition:</b> Graph.h:51</div></div>
<div class="ttc" id="classCvrStgFile_html"><div class="ttname"><a href="classCvrStgFile.html">CvrStgFile</a></div><div class="ttdoc">a cover-/stego-file </div><div class="ttdef"><b>Definition:</b> CvrStgFile.h:46</div></div>
<div class="ttc" id="common_8h_html_a048401d1365616f5eef97e251096a02d"><div class="ttname"><a href="common_8h.html#a048401d1365616f5eef97e251096a02d">SamplePos</a></div><div class="ttdeci">UWORD32 SamplePos</div><div class="ttdef"><b>Definition:</b> common.h:67</div></div>
<div class="ttc" id="classCvrStgObject_html_ac77a8da85a4f7b53e2166e990dfaa4f2"><div class="ttname"><a href="classCvrStgObject.html#ac77a8da85a4f7b53e2166e990dfaa4f2">CvrStgObject::getSampleValue</a></div><div class="ttdeci">virtual SampleValue * getSampleValue(const SamplePos pos) const =0</div></div>
<div class="ttc" id="classCvrStgFile_html_ad8cf6e0ba364c9d84e8321dbd68c3f26"><div class="ttname"><a href="classCvrStgFile.html#ad8cf6e0ba364c9d84e8321dbd68c3f26">CvrStgFile::getMatchingAlgorithms</a></div><div class="ttdeci">virtual std::vector< MatchingAlgorithm * > getMatchingAlgorithms(Graph *g, Matching *m) const </div><div class="ttdef"><b>Definition:</b> CvrStgFile.cc:103</div></div>
<div class="ttc" id="classSampleValue_html"><div class="ttname"><a href="classSampleValue.html">SampleValue</a></div><div class="ttdoc">the value of a sample in a CvrStgFile </div><div class="ttdef"><b>Definition:</b> SampleValue.h:61</div></div>
<div class="ttc" id="classCvrStgFile_html_a97ee067aec9c2c52c51ed02f372c7a16"><div class="ttname"><a href="classCvrStgFile.html#a97ee067aec9c2c52c51ed02f372c7a16">CvrStgFile::getEmbeddedValue</a></div><div class="ttdeci">virtual EmbValue getEmbeddedValue(const SamplePos pos) const </div><div class="ttdef"><b>Definition:</b> CvrStgFile.cc:111</div></div>
<div class="ttc" id="common_8h_html_a6b8592979b076e06aa233e3f586ac999"><div class="ttname"><a href="common_8h.html#a6b8592979b076e06aa233e3f586ac999">UWORD32</a></div><div class="ttdeci">unsigned long UWORD32</div><div class="ttdef"><b>Definition:</b> common.h:45</div></div>
<div class="ttc" id="classMatching_html"><div class="ttname"><a href="classMatching.html">Matching</a></div><div class="ttdoc">represent a matching on a graph </div><div class="ttdef"><b>Definition:</b> Matching.h:41</div></div>
<div class="ttc" id="classBinaryIO_html"><div class="ttname"><a href="classBinaryIO.html">BinaryIO</a></div><div class="ttdoc">provides methods for file i/o as needed by the rest of steghide </div><div class="ttdef"><b>Definition:</b> BinaryIO.h:33</div></div>
<div class="ttc" id="classCvrStgObject_html_a80ae8f095b66683e5207adf8ff8265b4"><div class="ttname"><a href="classCvrStgObject.html#a80ae8f095b66683e5207adf8ff8265b4">CvrStgObject::getNumSamples</a></div><div class="ttdeci">virtual unsigned long getNumSamples(void) const =0</div></div>
<div class="ttc" id="CvrStgFile_8h_html"><div class="ttname"><a href="CvrStgFile_8h.html">CvrStgFile.h</a></div></div>
<div class="ttc" id="common_8h_html"><div class="ttname"><a href="common_8h.html">common.h</a></div></div>
<div class="ttc" id="common_8h_html_acf820202f81f25eb00734eac0d7aed2d"><div class="ttname"><a href="common_8h.html#acf820202f81f25eb00734eac0d7aed2d">EmbValue</a></div><div class="ttdeci">BYTE EmbValue</div><div class="ttdef"><b>Definition:</b> common.h:66</div></div>
<div class="ttc" id="classCvrStgFile_html_af2b8f47f83f9210409af6be7d750a841"><div class="ttname"><a href="classCvrStgFile.html#af2b8f47f83f9210409af6be7d750a841">CvrStgFile::write</a></div><div class="ttdeci">virtual void write(void)</div><div class="ttdef"><b>Definition:</b> CvrStgFile.cc:68</div></div>
<div class="ttc" id="classCvrStgFile_html_afe2f570ea6447c0636093b44ff7793cc"><div class="ttname"><a href="classCvrStgFile.html#afe2f570ea6447c0636093b44ff7793cc">CvrStgFile::getProperties</a></div><div class="ttdeci">virtual std::list< Property > getProperties(void) const =0</div></div>
<div class="ttc" id="classCvrStgFile_html_a8a568ccb2ad5d6c178f764dca6090908"><div class="ttname"><a href="classCvrStgFile.html#a8a568ccb2ad5d6c178f764dca6090908">CvrStgFile::read</a></div><div class="ttdeci">virtual void read(BinaryIO *io)</div><div class="ttdef"><b>Definition:</b> CvrStgFile.cc:63</div></div>
<div class="ttc" id="classCvrStgObject_html_a3068d6a9dcc1c0b8bde2f081cfde6ce5"><div class="ttname"><a href="classCvrStgObject.html#a3068d6a9dcc1c0b8bde2f081cfde6ce5">CvrStgObject::replaceSample</a></div><div class="ttdeci">virtual void replaceSample(const SamplePos pos, const SampleValue *s)=0</div></div>
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