<!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"/> <title>GNU Radio 3.2.2 C++ API: gr_align_on_samplenumbers_ss.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body> <!-- Generated by Doxygen 1.6.2 --> <h1>gr_align_on_samplenumbers_ss.h</h1><a href="gr__align__on__samplenumbers__ss_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c++ -*- */</span> <a name="l00002"></a>00002 <span class="comment">/*</span> <a name="l00003"></a>00003 <span class="comment"> * Copyright 2005 Free Software Foundation, Inc.</span> <a name="l00004"></a>00004 <span class="comment"> * </span> <a name="l00005"></a>00005 <span class="comment"> * This file is part of GNU Radio</span> <a name="l00006"></a>00006 <span class="comment"> * </span> <a name="l00007"></a>00007 <span class="comment"> * GNU Radio is free software; you can redistribute it and/or modify</span> <a name="l00008"></a>00008 <span class="comment"> * it under the terms of the GNU General Public License as published by</span> <a name="l00009"></a>00009 <span class="comment"> * the Free Software Foundation; either version 3, or (at your option)</span> <a name="l00010"></a>00010 <span class="comment"> * any later version.</span> <a name="l00011"></a>00011 <span class="comment"> * </span> <a name="l00012"></a>00012 <span class="comment"> * GNU Radio is distributed in the hope that it will be useful,</span> <a name="l00013"></a>00013 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span> <a name="l00014"></a>00014 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span> <a name="l00015"></a>00015 <span class="comment"> * GNU General Public License for more details.</span> <a name="l00016"></a>00016 <span class="comment"> * </span> <a name="l00017"></a>00017 <span class="comment"> * You should have received a copy of the GNU General Public License</span> <a name="l00018"></a>00018 <span class="comment"> * along with GNU Radio; see the file COPYING. If not, write to</span> <a name="l00019"></a>00019 <span class="comment"> * the Free Software Foundation, Inc., 51 Franklin Street,</span> <a name="l00020"></a>00020 <span class="comment"> * Boston, MA 02110-1301, USA.</span> <a name="l00021"></a>00021 <span class="comment"> */</span> <a name="l00022"></a>00022 <a name="l00023"></a>00023 <span class="preprocessor">#ifndef INCLUDED_GR_ALIGN_ON_SAMPLE_NUMBERS_SS_H</span> <a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_GR_ALIGN_ON_SAMPLE_NUMBERS_SS_H</span> <a name="l00025"></a>00025 <span class="preprocessor"></span> <a name="l00026"></a>00026 <span class="preprocessor">#include <<a class="code" href="gr__block_8h.html">gr_block.h</a>></span> <a name="l00027"></a>00027 <span class="comment"></span> <a name="l00028"></a>00028 <span class="comment">/*!</span> <a name="l00029"></a>00029 <span class="comment"> * \brief align several complex short (interleaved short) input channels with corresponding unsigned 32 bit sample_counters (provided as interleaved 16 bit values)</span> <a name="l00030"></a>00030 <span class="comment"> * \ingroup misc</span> <a name="l00031"></a>00031 <span class="comment"> * \param number of complex_short input channels (including the 32 bit counting channel)</span> <a name="l00032"></a>00032 <span class="comment"> * \param align_interval is after how much samples (minimally) the sample-alignement is refreshed. Default is 128.</span> <a name="l00033"></a>00033 <span class="comment"> * A bigger value means less processing power but also requests more buffer space, which has a maximum.</span> <a name="l00034"></a>00034 <span class="comment"> * Decrease the align_interval if you get an error like:</span> <a name="l00035"></a>00035 <span class="comment"> * "sched: <gr_block align_on_samplenumbers_ss (0)> is requesting more input data than we can provide.</span> <a name="l00036"></a>00036 <span class="comment"> * ninput_items_required = 32768</span> <a name="l00037"></a>00037 <span class="comment"> * max_possible_items_available = 16383</span> <a name="l00038"></a>00038 <span class="comment"> * If this is a filter, consider reducing the number of taps."</span> <a name="l00039"></a>00039 <span class="comment"> * \ingroup block</span> <a name="l00040"></a>00040 <span class="comment"> * Pay attention on how you connect this block.</span> <a name="l00041"></a>00041 <span class="comment"> * It expects a minimum of 2 usrp_source_s with nchan number of channels and FPGA_MODE_COUNTING_32BIT enabled.</span> <a name="l00042"></a>00042 <span class="comment"> * This means that the first complex_short channel on every input is an interleaved 32 bit counter. </span> <a name="l00043"></a>00043 <span class="comment"> * The samples are aligned by dropping samples untill the samplenumbers match.</span> <a name="l00044"></a>00044 <span class="comment"> */</span> <a name="l00045"></a>00045 <span class="keyword">class </span><a class="code" href="classgr__align__on__samplenumbers__ss.html">gr_align_on_samplenumbers_ss</a>; <a name="l00046"></a>00046 <span class="keyword">typedef</span> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">boost::shared_ptr<gr_align_on_samplenumbers_ss></a> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">gr_align_on_samplenumbers_ss_sptr</a>; <a name="l00047"></a>00047 <a name="l00048"></a>00048 <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">gr_align_on_samplenumbers_ss_sptr</a> <a class="code" href="gr__align__on__samplenumbers__ss_8h.html#ad30034c6c9fe300180c7b21034d0ea86">gr_make_align_on_samplenumbers_ss</a> (<span class="keywordtype">int</span> nchan=2, <span class="keywordtype">int</span> align_interval=128); <a name="l00049"></a>00049 <a name="l00050"></a>00050 <a name="l00051"></a>00051 <a name="l00052"></a>00052 <a name="l00053"></a><a class="code" href="classgr__align__on__samplenumbers__ss.html">00053</a> <span class="keyword">class </span><a class="code" href="classgr__align__on__samplenumbers__ss.html">gr_align_on_samplenumbers_ss</a> : <span class="keyword">public</span> <a class="code" href="classgr__block.html" title="The abstract base class for all &#39;terminal&#39; processing blocks.A signal processing...">gr_block</a> <a name="l00054"></a>00054 { <a name="l00055"></a>00055 <span class="keywordtype">int</span> d_align_interval; <a name="l00056"></a>00056 <span class="keywordtype">int</span> d_sample_counter; <a name="l00057"></a>00057 <span class="keywordtype">int</span> d_nchan; <a name="l00058"></a>00058 <span class="keywordtype">bool</span> d_in_presync; <a name="l00059"></a>00059 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> d_ninputs; <a name="l00060"></a>00060 <span class="keyword">class </span>align_state { <a name="l00061"></a>00061 <span class="keyword">public</span>: <a name="l00062"></a>00062 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ucounter_end; <a name="l00063"></a>00063 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ucounter_begin; <a name="l00064"></a>00064 <span class="keywordtype">int</span> diff; <a name="l00065"></a>00065 <span class="keywordtype">int</span> diff_comp; <a name="l00066"></a>00066 <span class="keywordtype">int</span> diff_end; <a name="l00067"></a>00067 <span class="keywordtype">int</span> diff_comp_end; <a name="l00068"></a>00068 <span class="keywordtype">bool</span> sync_found; <a name="l00069"></a>00069 <span class="keywordtype">bool</span> sync_end_found; <a name="l00070"></a>00070 <span class="keywordtype">int</span> ninput_items; <a name="l00071"></a>00071 <span class="keywordtype">int</span> ninput_items_used; <a name="l00072"></a>00072 }; <a name="l00073"></a>00073 <a class="code" href="classstd_1_1vector.html">std::vector<align_state></a> d_state; <a name="l00074"></a>00074 <a name="l00075"></a>00075 <span class="keyword">friend</span> <a class="code" href="classboost_1_1shared__ptr.html" title="shared_ptr documentation stub">gr_align_on_samplenumbers_ss_sptr</a> <a class="code" href="classgr__align__on__samplenumbers__ss.html#a02659e5c9c852964b343ada88e6a3083">gr_make_align_on_samplenumbers_ss</a> (<span class="keywordtype">int</span> nchan,<span class="keywordtype">int</span> align_interval); <a name="l00076"></a>00076 <a class="code" href="classgr__align__on__samplenumbers__ss.html">gr_align_on_samplenumbers_ss</a> (<span class="keywordtype">int</span> nchan,<span class="keywordtype">int</span> align_interval); <a name="l00077"></a>00077 <a name="l00078"></a>00078 <span class="keyword">public</span>: <a name="l00079"></a>00079 <a class="code" href="classgr__align__on__samplenumbers__ss.html#af05b1ccaa31195e895689592f9861463">~gr_align_on_samplenumbers_ss</a>(); <a name="l00080"></a>00080 <span class="keywordtype">bool</span> <a class="code" href="classgr__align__on__samplenumbers__ss.html#af649e20f007f54c089a406839e0878ff" title="Confirm that ninputs and noutputs is an acceptable combination.">check_topology</a> (<span class="keywordtype">int</span> ninputs, <span class="keywordtype">int</span> noutputs); <a name="l00081"></a>00081 <span class="keywordtype">void</span> <a class="code" href="classgr__align__on__samplenumbers__ss.html#a0ae31942c98cd81ab111d9f1c6d6f194" title="Estimate input requirements given output request.">forecast</a> (<span class="keywordtype">int</span> noutput_items, <a name="l00082"></a>00082 <a class="code" href="classstd_1_1vector.html">gr_vector_int</a> &ninput_items_required); <a name="l00083"></a>00083 <a name="l00084"></a>00084 <span class="keywordtype">int</span> <a class="code" href="classgr__align__on__samplenumbers__ss.html#abb17a646f937035331c48072b7ca5ee3" title="compute output items from input items">general_work</a> (<span class="keywordtype">int</span> noutput_items, <a name="l00085"></a>00085 <a class="code" href="classstd_1_1vector.html">gr_vector_int</a> &ninput_items, <a name="l00086"></a>00086 <a class="code" href="classstd_1_1vector.html">gr_vector_const_void_star</a> &input_items, <a name="l00087"></a>00087 <a class="code" href="classstd_1_1vector.html">gr_vector_void_star</a> &output_items); <a name="l00088"></a>00088 }; <a name="l00089"></a>00089 <a name="l00090"></a>00090 <a name="l00091"></a>00091 <span class="preprocessor">#endif </span><span class="comment">/* INCLUDED_GR_ALIGN_ON_SAMPLE_NUMBERS_SS_H */</span> </pre></div></div> <hr size="1"/><address style="text-align: right;"><small>Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address> </body> </html>