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<h1>gr_sync_interpolator.h</h1> </div>
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<a href="gr__sync__interpolator_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 2004,2008 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_SYNC_INTERPOLATOR_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define INCLUDED_GR_SYNC_INTERPOLATOR_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__sync__block_8h.html">gr_sync_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 synchronous 1:N input to output with history</span>
<a name="l00030"></a>00030 <span class="comment"> * \ingroup base_blk</span>
<a name="l00031"></a>00031 <span class="comment"> *</span>
<a name="l00032"></a>00032 <span class="comment"> * Override work to provide the signal processing implementation.</span>
<a name="l00033"></a>00033 <span class="comment"> */</span>
<a name="l00034"></a><a class="code" href="classgr__sync__interpolator.html">00034</a> <span class="keyword">class </span><a class="code" href="classgr__sync__interpolator.html" title="synchronous 1:N input to output with historyOverride work to provide the signal processing implementa...">gr_sync_interpolator</a> : <span class="keyword">public</span> <a class="code" href="classgr__sync__block.html" title="synchronous 1:1 input to output with historyOverride work to provide the signal processing implementa...">gr_sync_block</a>
<a name="l00035"></a>00035 {
<a name="l00036"></a>00036 <span class="keyword">private</span>:
<a name="l00037"></a>00037 <span class="keywordtype">unsigned</span> d_interpolation;
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="keyword">protected</span>:
<a name="l00040"></a>00040 <a class="code" href="classgr__sync__interpolator.html#a0038ee6e80dc446b02ff1caf2556780b">gr_sync_interpolator</a> (<span class="keyword">const</span> std::string &<a class="code" href="classgr__basic__block.html#aa12a20d8b8eab341da935530d29299d2">name</a>,
<a name="l00041"></a>00041 <a class="code" href="classboost_1_1shared__ptr.html">gr_io_signature_sptr</a> <a class="code" href="classgr__basic__block.html#a58f6d05e85931200f3771d3e50741281">input_signature</a>,
<a name="l00042"></a>00042 <a class="code" href="classboost_1_1shared__ptr.html">gr_io_signature_sptr</a> <a class="code" href="classgr__basic__block.html#add68b96f012dfe352700b4fd1c3a184a">output_signature</a>,
<a name="l00043"></a>00043 <span class="keywordtype">unsigned</span> <a class="code" href="classgr__sync__interpolator.html#a39beb8a7754295afcc0ff4e5240ceaaf">interpolation</a>);
<a name="l00044"></a>00044 <span class="keyword">public</span>:
<a name="l00045"></a>00045
<a name="l00046"></a><a class="code" href="classgr__sync__interpolator.html#a39beb8a7754295afcc0ff4e5240ceaaf">00046</a> <span class="keywordtype">unsigned</span> <a class="code" href="classgr__sync__interpolator.html#a39beb8a7754295afcc0ff4e5240ceaaf">interpolation</a> ()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> d_interpolation; }
<a name="l00047"></a><a class="code" href="classgr__sync__interpolator.html#a25bb02d6ac26404780bdd217355107ad">00047</a> <span class="keywordtype">void</span> <a class="code" href="classgr__sync__interpolator.html#a25bb02d6ac26404780bdd217355107ad">set_interpolation</a> (<span class="keywordtype">unsigned</span> interpolation)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 d_interpolation = <a class="code" href="classgr__sync__interpolator.html#a39beb8a7754295afcc0ff4e5240ceaaf">interpolation</a>;
<a name="l00050"></a>00050 <a class="code" href="classgr__block.html#ab9dc7e6d30692bbfa65fc7c4eef6fc9d" title="Set the approximate output rate / input rate.">set_relative_rate</a> (1.0 * interpolation);
<a name="l00051"></a>00051 <a class="code" href="classgr__block.html#a14e8b799f920e52afb93fac413b1a729" title="Constrain the noutput_items argument passed to forecast and general_work.">set_output_multiple</a> (interpolation);
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="comment">// gr_sync_interpolator overrides these to assist work</span>
<a name="l00055"></a>00055 <span class="keywordtype">void</span> <a class="code" href="classgr__sync__interpolator.html#a81ef017ef4ec17d0808cd1c0e2ceb803" title="Estimate input requirements given output request.">forecast</a> (<span class="keywordtype">int</span> noutput_items, <a class="code" href="classstd_1_1vector.html">gr_vector_int</a> &ninput_items_required);
<a name="l00056"></a>00056 <span class="keywordtype">int</span> <a class="code" href="classgr__sync__interpolator.html#a49cd2967b214ead14270d97dab932301" title="compute output items from input items">general_work</a> (<span class="keywordtype">int</span> noutput_items,
<a name="l00057"></a>00057 <a class="code" href="classstd_1_1vector.html">gr_vector_int</a> &ninput_items,
<a name="l00058"></a>00058 <a class="code" href="classstd_1_1vector.html">gr_vector_const_void_star</a> &input_items,
<a name="l00059"></a>00059 <a class="code" href="classstd_1_1vector.html">gr_vector_void_star</a> &output_items);
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="comment">// derived classes should override work</span>
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordtype">int</span> <a class="code" href="classgr__sync__interpolator.html#a943227c6134e71a7867a66977b414533" title="Given ninput samples, return number of output samples that will be produced. N.B. this is only define...">fixed_rate_ninput_to_noutput</a>(<span class="keywordtype">int</span> ninput);
<a name="l00064"></a>00064 <span class="keywordtype">int</span> <a class="code" href="classgr__sync__interpolator.html#a03961e37cf520668a87f53762e638b9f" title="Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don&#39;t need to override this.">fixed_rate_noutput_to_ninput</a>(<span class="keywordtype">int</span> noutput);
<a name="l00065"></a>00065 };
<a name="l00066"></a>00066
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="preprocessor">#endif </span><span class="comment">/* INCLUDED_GR_SYNC_INTERPOLATOR_H */</span>
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