<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.3"/> <title>GNU Radio 3.6.4.1 C++ API: fft.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); $(window).load(resizeHeight); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">GNU Radio 3.6.4.1 C++ API </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.3 --> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> $(document).ready(function(){initNavTree('gr-fft_2include_2fft_2fft_8h_source.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">gr-fft/include/fft/fft.h</div> </div> </div><!--header--> <div class="contents"> <a href="gr-fft_2include_2fft_2fft_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">/* -*- c++ -*- */</span></div> <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">/*</span></div> <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright 2003,2008,2012 Free Software Foundation, Inc.</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 file is part of GNU Radio</span></div> <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div> <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * GNU Radio is free software; you can redistribute it and/or modify</span></div> <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * it under the terms of the GNU General Public License as published by</span></div> <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * the Free Software Foundation; either version 3, or (at your option)</span></div> <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * any later version.</span></div> <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> *</span></div> <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * GNU Radio is distributed in the hope that it will be useful,</span></div> <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div> <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div> <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * GNU General Public License for more details.</span></div> <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> *</span></div> <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * You should have received a copy of the GNU General Public License</span></div> <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * along with GNU Radio; see the file COPYING. If not, write to</span></div> <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * the Free Software Foundation, Inc., 51 Franklin Street,</span></div> <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * Boston, MA 02110-1301, USA.</span></div> <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div> <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div> <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#ifndef _FFT_FFT_H_</span></div> <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor"></span><span class="preprocessor">#define _FFT_FFT_H_</span></div> <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor"></span></div> <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">/*</span></div> <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * Wrappers for FFTW single precision 1d dft</span></div> <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> */</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="preprocessor">#include <<a class="code" href="gr-fft_2include_2fft_2api_8h.html">fft/api.h</a>></span></div> <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="gr__complex_8h.html">gr_complex.h</a>></span></div> <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <boost/thread.hpp></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> <span class="keyword">namespace </span>gr {</div> <div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="namespacegr_1_1fft.html"> 35</a></span>  <span class="keyword">namespace </span><a class="code" href="gr-vocoder_2lib_2codec2_2fft_8h.html#abd9a109cea526d9640a8753e360ca00f">fft</a> {</div> <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div> <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"></span></div> <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> /*! \brief Helper function for allocating complex fft buffers</span></div> <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> */</span></div> <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <a class="code" href="gr-fft_2include_2fft_2api_8h.html#a970d73334383137115742a2ea952c803">FFT_API</a> <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a>* <a class="code" href="namespacegr_1_1fft.html#a2c47f9108f09cc25156a83a894861c9a" title="Helper function for allocating complex fft buffers.">malloc_complex</a>(<span class="keywordtype">int</span> size);</div> <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"></span></div> <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> /*! \brief Helper function for allocating float fft buffers</span></div> <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> */</span></div> <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <a class="code" href="gr-fft_2include_2fft_2api_8h.html#a970d73334383137115742a2ea952c803">FFT_API</a> <span class="keywordtype">float</span>* <a class="code" href="namespacegr_1_1fft.html#a1abd6b51e896f766e41d92ac68432b31" title="Helper function for allocating float fft buffers.">malloc_float</a>(<span class="keywordtype">int</span> size);</div> <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment"></span></div> <div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> /*! \brief Helper function for freeing fft buffers</span></div> <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> */</span></div> <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <a class="code" href="gr-fft_2include_2fft_2api_8h.html#a970d73334383137115742a2ea952c803">FFT_API</a> <span class="keywordtype">void</span> <a class="code" href="namespacegr_1_1fft.html#af628afaef04c25fdb089c08b214af38f" title="Helper function for freeing fft buffers.">free</a>(<span class="keywordtype">void</span> *b);</div> <div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"></span></div> <div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * \brief Export reference to planner mutex for those apps that</span></div> <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * want to use FFTW w/o using the fft_impl_fftw* classes.</span></div> <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> */</span></div> <div class="line"><a name="l00054"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1planner.html"> 54</a></span>  <span class="keyword">class </span><a class="code" href="gr-fft_2include_2fft_2api_8h.html#a970d73334383137115742a2ea952c803">FFT_API</a> <a class="code" href="classgr_1_1fft_1_1planner.html" title="Export reference to planner mutex for those apps that want to use FFTW w/o using the fft_impl_fftw* c...">planner</a> {</div> <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">public</span>:</div> <div class="line"><a name="l00056"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1planner.html#a9c2594fe187f98760f330381fb5ea72d"> 56</a></span>  <span class="keyword">typedef</span> <a class="code" href="namespacegruel.html#a93eaa071dca707d684d1ba1ee4ca74c5">boost::mutex::scoped_lock</a> <a class="code" href="classgr_1_1fft_1_1planner.html#a9c2594fe187f98760f330381fb5ea72d">scoped_lock</a>;<span class="comment"></span></div> <div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * Return reference to planner mutex</span></div> <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> */</span></div> <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">static</span> <a class="code" href="namespacegruel.html#a16a913898c1d7f7a8ee459eb7ace413d">boost::mutex</a> &<a class="code" href="namespacegruel.html#a16a913898c1d7f7a8ee459eb7ace413d">mutex</a>();</div> <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  };</div> <div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"></span></div> <div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * \brief FFT: complex in, complex out</span></div> <div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * \ingroup misc</span></div> <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> */</span></div> <div class="line"><a name="l00067"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__complex.html"> 67</a></span>  <span class="keyword">class </span><a class="code" href="gr-fft_2include_2fft_2api_8h.html#a970d73334383137115742a2ea952c803">FFT_API</a> <a class="code" href="classgr_1_1fft_1_1fft__complex.html" title="FFT: complex in, complex out.">fft_complex</a> {</div> <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">int</span> d_fft_size;</div> <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">int</span> d_nthreads;</div> <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *d_inbuf;</div> <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *d_outbuf;</div> <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">void</span> *d_plan;</div> <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div> <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keyword">public</span>:</div> <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <a class="code" href="classgr_1_1fft_1_1fft__complex.html" title="FFT: complex in, complex out.">fft_complex</a>(<span class="keywordtype">int</span> fft_size, <span class="keywordtype">bool</span> forward = <span class="keyword">true</span>, <span class="keywordtype">int</span> nthreads=1);</div> <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">virtual</span> ~<a class="code" href="classgr_1_1fft_1_1fft__complex.html" title="FFT: complex in, complex out.">fft_complex</a>();</div> <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  </div> <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">/*</span></div> <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * These return pointers to buffers owned by fft_impl_fft_complex</span></div> <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> * into which input and output take place. It's done this way in</span></div> <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> * order to ensure optimal alignment for SIMD instructions.</span></div> <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> */</span></div> <div class="line"><a name="l00083"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__complex.html#ab77c4042ab2f4a3457decd696131e061"> 83</a></span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *<a class="code" href="classgr_1_1fft_1_1fft__complex.html#ab77c4042ab2f4a3457decd696131e061">get_inbuf</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_inbuf; }</div> <div class="line"><a name="l00084"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__complex.html#ae9f867cd3b1b13efd31cc15ebfd79b26"> 84</a></span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *<a class="code" href="classgr_1_1fft_1_1fft__complex.html#ae9f867cd3b1b13efd31cc15ebfd79b26">get_outbuf</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_outbuf; }</div> <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  </div> <div class="line"><a name="l00086"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__complex.html#aba4f2b1ea2cb5bb818dbc50facbf22e1"> 86</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__complex.html#aba4f2b1ea2cb5bb818dbc50facbf22e1">inbuf_length</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_fft_size; }</div> <div class="line"><a name="l00087"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__complex.html#a1789d1a0e86632ae82b2851020c6e612"> 87</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__complex.html#a1789d1a0e86632ae82b2851020c6e612">outbuf_length</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_fft_size; }</div> <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment"></span></div> <div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> * Set the number of threads to use for caclulation.</span></div> <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> */</span></div> <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordtype">void</span> set_nthreads(<span class="keywordtype">int</span> n);</div> <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment"></span></div> <div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> * Get the number of threads being used by FFTW</span></div> <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> */</span></div> <div class="line"><a name="l00097"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__complex.html#a1b74d9368319987440d210603c2a5bfb"> 97</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__complex.html#a1b74d9368319987440d210603c2a5bfb">nthreads</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_nthreads; }</div> <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="comment"></span></div> <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * compute FFT. The input comes from inbuf, the output is placed in</span></div> <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * outbuf.</span></div> <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> */</span></div> <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">void</span> execute();</div> <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  };</div> <div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"></span></div> <div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * \brief FFT: real in, complex out</span></div> <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * \ingroup misc</span></div> <div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> */</span></div> <div class="line"><a name="l00110"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html"> 110</a></span>  <span class="keyword">class </span><a class="code" href="gr-fft_2include_2fft_2api_8h.html#a970d73334383137115742a2ea952c803">FFT_API</a> <a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html" title="FFT: real in, complex out.">fft_real_fwd</a> {</div> <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordtype">int</span> d_fft_size;</div> <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordtype">int</span> d_nthreads;</div> <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordtype">float</span> *d_inbuf;</div> <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *d_outbuf;</div> <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordtype">void</span> *d_plan;</div> <div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div> <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keyword">public</span>:</div> <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html" title="FFT: real in, complex out.">fft_real_fwd</a> (<span class="keywordtype">int</span> fft_size, <span class="keywordtype">int</span> nthreads=1);</div> <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keyword">virtual</span> ~<a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html" title="FFT: real in, complex out.">fft_real_fwd</a> ();</div> <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  </div> <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">/*</span></div> <div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> * These return pointers to buffers owned by fft_impl_fft_real_fwd</span></div> <div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * into which input and output take place. It's done this way in</span></div> <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * order to ensure optimal alignment for SIMD instructions.</span></div> <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> */</span></div> <div class="line"><a name="l00126"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a3eb2fb77e1bfd616c3abd93cf6d8630b"> 126</a></span>  <span class="keywordtype">float</span> *<a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a3eb2fb77e1bfd616c3abd93cf6d8630b">get_inbuf</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_inbuf; }</div> <div class="line"><a name="l00127"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a1a4fbb8f7d6212ec53f94da3d302922b"> 127</a></span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *<a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a1a4fbb8f7d6212ec53f94da3d302922b">get_outbuf</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_outbuf; }</div> <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  </div> <div class="line"><a name="l00129"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#af4ed7bef49e1162ad4feb2e2c4177ff2"> 129</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#af4ed7bef49e1162ad4feb2e2c4177ff2">inbuf_length</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_fft_size; }</div> <div class="line"><a name="l00130"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a3a09dd0f786f399c856eda17f42777ef"> 130</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a3a09dd0f786f399c856eda17f42777ef">outbuf_length</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_fft_size / 2 + 1; }</div> <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="comment"></span></div> <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * Set the number of threads to use for caclulation.</span></div> <div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> */</span></div> <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordtype">void</span> set_nthreads(<span class="keywordtype">int</span> n);</div> <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="comment"></span></div> <div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> * Get the number of threads being used by FFTW</span></div> <div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> */</span></div> <div class="line"><a name="l00140"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a9483509a7fed8088c6d77510d352e27e"> 140</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__real__fwd.html#a9483509a7fed8088c6d77510d352e27e">nthreads</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_nthreads; }</div> <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="comment"></span></div> <div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> * compute FFT. The input comes from inbuf, the output is placed in</span></div> <div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> * outbuf.</span></div> <div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> */</span></div> <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keywordtype">void</span> execute();</div> <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  };</div> <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"></span></div> <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> * \brief FFT: complex in, float out</span></div> <div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * \ingroup misc</span></div> <div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> */</span></div> <div class="line"><a name="l00153"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__rev.html"> 153</a></span>  <span class="keyword">class </span><a class="code" href="gr-fft_2include_2fft_2api_8h.html#a970d73334383137115742a2ea952c803">FFT_API</a> <a class="code" href="classgr_1_1fft_1_1fft__real__rev.html" title="FFT: complex in, float out.">fft_real_rev</a> {</div> <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordtype">int</span> d_fft_size;</div> <div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordtype">int</span> d_nthreads;</div> <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *d_inbuf;</div> <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordtype">float</span> *d_outbuf;</div> <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">void</span> *d_plan;</div> <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  </div> <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">public</span>:</div> <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <a class="code" href="classgr_1_1fft_1_1fft__real__rev.html" title="FFT: complex in, float out.">fft_real_rev</a>(<span class="keywordtype">int</span> fft_size, <span class="keywordtype">int</span> nthreads=1);</div> <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keyword">virtual</span> ~<a class="code" href="classgr_1_1fft_1_1fft__real__rev.html" title="FFT: complex in, float out.">fft_real_rev</a>();</div> <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  </div> <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="comment">/*</span></div> <div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"> * These return pointers to buffers owned by fft_impl_fft_real_rev</span></div> <div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> * into which input and output take place. It's done this way in</span></div> <div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"> * order to ensure optimal alignment for SIMD instructions.</span></div> <div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> */</span></div> <div class="line"><a name="l00169"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a5c17e17d180127190ee6451b6690b170"> 169</a></span>  <a class="code" href="gr__complex_8h.html#aec4bfe41433369afae9327f1b0bc9109">gr_complex</a> *<a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a5c17e17d180127190ee6451b6690b170">get_inbuf</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_inbuf; }</div> <div class="line"><a name="l00170"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a8b8d495fede762a50df4d709313d921a"> 170</a></span>  <span class="keywordtype">float</span> *<a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a8b8d495fede762a50df4d709313d921a">get_outbuf</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_outbuf; }</div> <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  </div> <div class="line"><a name="l00172"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a17e926e3b18957c7a64427d552a0302f"> 172</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a17e926e3b18957c7a64427d552a0302f">inbuf_length</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_fft_size / 2 + 1; }</div> <div class="line"><a name="l00173"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#aa3405ea9a7608baa3c86de00fd4a66ca"> 173</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#aa3405ea9a7608baa3c86de00fd4a66ca">outbuf_length</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_fft_size; }</div> <div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="comment"></span></div> <div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * Set the number of threads to use for caclulation.</span></div> <div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> */</span></div> <div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordtype">void</span> set_nthreads(<span class="keywordtype">int</span> n);</div> <div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment"></span></div> <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> * Get the number of threads being used by FFTW</span></div> <div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> */</span></div> <div class="line"><a name="l00183"></a><span class="lineno"><a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a49f22df6b3c2cd8e153e7ee4971998b4"> 183</a></span>  <span class="keywordtype">int</span> <a class="code" href="classgr_1_1fft_1_1fft__real__rev.html#a49f22df6b3c2cd8e153e7ee4971998b4">nthreads</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_nthreads; }</div> <div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="comment"></span></div> <div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> /*!</span></div> <div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> * compute FFT. The input comes from inbuf, the output is placed in</span></div> <div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> * outbuf.</span></div> <div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> */</span></div> <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordtype">void</span> execute();</div> <div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  };</div> <div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div> <div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  } <span class="comment">/* namespace fft */</span></div> <div class="line"><a name="l00193"></a><span class="lineno"> 193</span> } <span class="comment">/*namespace gr */</span></div> <div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div> <div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="preprocessor">#endif </span><span class="comment">/* _FFT_FFT_H_ */</span><span class="preprocessor"></span></div> </div><!-- fragment --></div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="navelem"><a class="el" href="dir_03e9e719765a1c029979c1402d7598c6.html">gr-fft</a></li><li class="navelem"><a class="el" href="dir_4bfbcebfc9c5c209e8def38ccf020e04.html">include</a></li><li class="navelem"><a class="el" href="dir_0e1b759e08a02f6e96244c333d04cf37.html">fft</a></li><li class="navelem"><a class="el" href="gr-fft_2include_2fft_2fft_8h.html">fft.h</a></li> <li class="footer">Generated on Fri Apr 19 2013 16:20:33 for GNU Radio 3.6.4.1 C++ API by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.3 </li> </ul> </div> </body> </html>