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<title>GNU Radio 3.3.0 C++ API: gr_fractional_interpolator_ff Class Reference</title>
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<h1>gr_fractional_interpolator_ff Class Reference<br/>
<small>
[<a class="el" href="group__filter__blk.html">Filters</a>]</small>
</h1><!-- doxytag: class="gr_fractional_interpolator_ff" --><!-- doxytag: inherits="gr_block" -->
<p>Interpolating mmse filter with float input, float output.
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="gr__fractional__interpolator__ff_8h_source.html">gr_fractional_interpolator_ff.h</a>></code></p>
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Inheritance diagram for gr_fractional_interpolator_ff:</div>
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<div class="center"><img src="classgr__fractional__interpolator__ff__inherit__graph.png" border="0" usemap="#gr__fractional__interpolator__ff_inherit__map" alt="Inheritance graph"/></div>
<map name="gr__fractional__interpolator__ff_inherit__map" id="gr__fractional__interpolator__ff_inherit__map">
<area shape="rect" id="node2" href="classgr__block.html" title="The abstract base class for all 'terminal' processing blocks.A signal processing..." alt="" coords="60,237,129,267"/><area shape="rect" id="node4" href="classgr__basic__block.html" title="The abstract base class for all signal processing blocks.Basic blocks are the bare..." alt="" coords="40,160,149,189"/><area shape="rect" id="node6" href="classgr__msg__accepter.html" title="Accepts messages and inserts them into a message queue, then notifies subclass gr_basic_block..." alt="" coords="33,83,156,112"/><area shape="rect" id="node8" href="classgruel_1_1msg__accepter.html" title="Virtual base class that accepts messages." alt="" coords="25,5,164,35"/></map>
<center><span class="legend">[<a target="top" href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="classgr__fractional__interpolator__ff-members.html">List of all members.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#adae3b49a58d4bb7315f876efad5e36f7">~gr_fractional_interpolator_ff</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#a482bc9dcf50f557e5d013456b41e359a">forecast</a> (int noutput_items, <a class="el" href="classstd_1_1vector.html">gr_vector_int</a> &ninput_items_required)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Estimate input requirements given output request. <a href="#a482bc9dcf50f557e5d013456b41e359a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#a54f3ca4e66e39196420affa96d12dbe3">general_work</a> (int noutput_items, <a class="el" href="classstd_1_1vector.html">gr_vector_int</a> &ninput_items, <a class="el" href="classstd_1_1vector.html">gr_vector_const_void_star</a> &input_items, <a class="el" href="classstd_1_1vector.html">gr_vector_void_star</a> &output_items)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">compute output items from input items <a href="#a54f3ca4e66e39196420affa96d12dbe3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">float </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#af662461f6e45183f8b756685824b0fdc">mu</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">float </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#ad0cda1b66405bd658dc8b1f89c2d5b36">interp_ratio</a> () const </td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#a4cfafa5efb54add49d9260634f3108e4">set_mu</a> (float mu)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#a227b4c33b50b7059cd66cb75fefe82d7">set_interp_ratio</a> (float interp_ratio)</td></tr>
<tr><td colspan="2"><h2>Protected Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#a76a70cadc8f716317b1662d6e4c46bf8">gr_fractional_interpolator_ff</a> (float phase_shift, float interp_ratio)</td></tr>
<tr><td colspan="2"><h2>Friends</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classboost_1_1shared__ptr.html">gr_fractional_interpolator_ff_sptr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classgr__fractional__interpolator__ff.html#a499cd05ed131c001ad9a7e5b2faaa94c">gr_make_fractional_interpolator_ff</a> (float phase_shift, float interp_ratio)</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Interpolating mmse filter with float input, float output. </p>
<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="adae3b49a58d4bb7315f876efad5e36f7"></a><!-- doxytag: member="gr_fractional_interpolator_ff::~gr_fractional_interpolator_ff" ref="adae3b49a58d4bb7315f876efad5e36f7" args="()" -->
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<td class="memname">gr_fractional_interpolator_ff::~gr_fractional_interpolator_ff </td>
<td>(</td>
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<td> ) </td>
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<a class="anchor" id="a76a70cadc8f716317b1662d6e4c46bf8"></a><!-- doxytag: member="gr_fractional_interpolator_ff::gr_fractional_interpolator_ff" ref="a76a70cadc8f716317b1662d6e4c46bf8" args="(float phase_shift, float interp_ratio)" -->
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<td class="memname">gr_fractional_interpolator_ff::gr_fractional_interpolator_ff </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"> <em>phase_shift</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"> <em>interp_ratio</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [protected]</code></td>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a482bc9dcf50f557e5d013456b41e359a"></a><!-- doxytag: member="gr_fractional_interpolator_ff::forecast" ref="a482bc9dcf50f557e5d013456b41e359a" args="(int noutput_items, gr_vector_int &ninput_items_required)" -->
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<td class="memname">void gr_fractional_interpolator_ff::forecast </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>noutput_items</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstd_1_1vector.html">gr_vector_int</a> & </td>
<td class="paramname"> <em>ninput_items_required</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td><code> [virtual]</code></td>
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<p>Estimate input requirements given output request. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>noutput_items</em> </td><td>number of output items to produce </td></tr>
<tr><td valign="top"></td><td valign="top"><em>ninput_items_required</em> </td><td>number of input items required on each input stream</td></tr>
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</dd>
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<p>Given a request to product <code>noutput_items</code>, estimate the number of data items required on each input stream. The estimate doesn't have to be exact, but should be close. </p>
<p>Reimplemented from <a class="el" href="classgr__block.html#aa1f2518b5c97126bb015adb9e2027f4a">gr_block</a>.</p>
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<a class="anchor" id="a54f3ca4e66e39196420affa96d12dbe3"></a><!-- doxytag: member="gr_fractional_interpolator_ff::general_work" ref="a54f3ca4e66e39196420affa96d12dbe3" args="(int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)" -->
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<td class="memname">int gr_fractional_interpolator_ff::general_work </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>noutput_items</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstd_1_1vector.html">gr_vector_int</a> & </td>
<td class="paramname"> <em>ninput_items</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstd_1_1vector.html">gr_vector_const_void_star</a> & </td>
<td class="paramname"> <em>input_items</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="classstd_1_1vector.html">gr_vector_void_star</a> & </td>
<td class="paramname"> <em>output_items</em></td><td> </td>
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<td>)</td>
<td></td><td></td><td><code> [virtual]</code></td>
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<p>compute output items from input items </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>noutput_items</em> </td><td>number of output items to write on each output stream </td></tr>
<tr><td valign="top"></td><td valign="top"><em>ninput_items</em> </td><td>number of input items available on each input stream </td></tr>
<tr><td valign="top"></td><td valign="top"><em>input_items</em> </td><td>vector of pointers to the input items, one entry per input stream </td></tr>
<tr><td valign="top"></td><td valign="top"><em>output_items</em> </td><td>vector of pointers to the output items, one entry per output stream</td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>number of items actually written to each output stream, or -1 on EOF. It is OK to return a value less than noutput_items. -1 <= return value <= noutput_items</dd></dl>
<p>general_work must call consume or consume_each to indicate how many items were consumed on each input stream. </p>
<p>Implements <a class="el" href="classgr__block.html#a137b93d87dc83bbdb6369d33f4ea8197">gr_block</a>.</p>
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<a class="anchor" id="ad0cda1b66405bd658dc8b1f89c2d5b36"></a><!-- doxytag: member="gr_fractional_interpolator_ff::interp_ratio" ref="ad0cda1b66405bd658dc8b1f89c2d5b36" args="() const " -->
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<td class="memname">float gr_fractional_interpolator_ff::interp_ratio </td>
<td>(</td>
<td class="paramname"></td>
<td> ) </td>
<td> const<code> [inline]</code></td>
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<a class="anchor" id="af662461f6e45183f8b756685824b0fdc"></a><!-- doxytag: member="gr_fractional_interpolator_ff::mu" ref="af662461f6e45183f8b756685824b0fdc" args="() const " -->
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<td class="memname">float gr_fractional_interpolator_ff::mu </td>
<td>(</td>
<td class="paramname"></td>
<td> ) </td>
<td> const<code> [inline]</code></td>
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<a class="anchor" id="a227b4c33b50b7059cd66cb75fefe82d7"></a><!-- doxytag: member="gr_fractional_interpolator_ff::set_interp_ratio" ref="a227b4c33b50b7059cd66cb75fefe82d7" args="(float interp_ratio)" -->
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<td class="memname">void gr_fractional_interpolator_ff::set_interp_ratio </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"> <em>interp_ratio</em></td>
<td> ) </td>
<td><code> [inline]</code></td>
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<a class="anchor" id="a4cfafa5efb54add49d9260634f3108e4"></a><!-- doxytag: member="gr_fractional_interpolator_ff::set_mu" ref="a4cfafa5efb54add49d9260634f3108e4" args="(float mu)" -->
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<td class="memname">void gr_fractional_interpolator_ff::set_mu </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"> <em>mu</em></td>
<td> ) </td>
<td><code> [inline]</code></td>
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<hr/><h2>Friends And Related Function Documentation</h2>
<a class="anchor" id="a499cd05ed131c001ad9a7e5b2faaa94c"></a><!-- doxytag: member="gr_fractional_interpolator_ff::gr_make_fractional_interpolator_ff" ref="a499cd05ed131c001ad9a7e5b2faaa94c" args="(float phase_shift, float interp_ratio)" -->
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<td class="memname"><a class="el" href="classboost_1_1shared__ptr.html">gr_fractional_interpolator_ff_sptr</a> gr_make_fractional_interpolator_ff </td>
<td>(</td>
<td class="paramtype">float </td>
<td class="paramname"> <em>phase_shift</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">float </td>
<td class="paramname"> <em>interp_ratio</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td><code> [friend]</code></td>
</tr>
</table>
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</div>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="gr__fractional__interpolator__ff_8h_source.html">gr_fractional_interpolator_ff.h</a></li>
</ul>
</div>
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