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<div id="projectname">libsdr
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 <span id="projectnumber">0.1.0</span>
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<div id="projectbrief">A simple SDR library</div>
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<li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li> </ul>
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<div class="title">fftplan_native.hh</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef __SDR_FFTPLAN_NATIVE_HH__</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define __SDR_FFTPLAN_NATIVE_HH__</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include "traits.hh"</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "fftplan.hh"</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> </div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="keyword">namespace </span><a class="code" href="namespacesdr.html">sdr</a> {</div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="keyword">template</span> <<span class="keyword">class</span> Scalar></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="keyword">class </span>FFTPlan</div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> {</div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00015"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#a3640c788bea68b27772771b9d73653b9"> 15</a></span>  <span class="keyword">typedef</span> <span class="keyword">typename</span> <a class="code" href="classsdr_1_1_traits.html">Traits<Scalar >::SScalar</a> <a class="code" href="classsdr_1_1_f_f_t_plan.html#a3640c788bea68b27772771b9d73653b9">SScalar</a>;</div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00019"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#a0797a5d126c311b031f6377b786e328d"> 19</a></span>  <a class="code" href="classsdr_1_1_f_f_t_plan.html#a0797a5d126c311b031f6377b786e328d">FFTPlan</a>(<span class="keyword">const</span> <a class="code" href="classsdr_1_1_buffer.html">Buffer</a>< std::complex<Scalar> > &in, <span class="keyword">const</span> <a class="code" href="classsdr_1_1_buffer.html">Buffer</a>< std::complex<Scalar> > &out,</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>  <a class="code" href="classsdr_1_1_f_f_t.html#a02a2b7ef1f2494d542b133a4995e5344">FFT::Direction</a> dir)</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  : <a class="code" href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e">_N</a>(in.size()), <a class="code" href="classsdr_1_1_f_f_t_plan.html#a52e13675a3b936b977df3edc5c132c87">_in</a>(in), <a class="code" href="classsdr_1_1_f_f_t_plan.html#a58b32e87e4b7bf0f7e6a1ec270c748a3">_out</a>(out)</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  {</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  <span class="comment">// Check dimensions</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keywordflow">if</span> (<a class="code" href="classsdr_1_1_f_f_t_plan.html#a52e13675a3b936b977df3edc5c132c87">_in</a>.<a class="code" href="classsdr_1_1_buffer.html#ad2232275b51b1189daea15c6cd9b3a20">size</a>() != <a class="code" href="classsdr_1_1_f_f_t_plan.html#a58b32e87e4b7bf0f7e6a1ec270c748a3">_out</a>.<a class="code" href="classsdr_1_1_buffer.html#ad2232275b51b1189daea15c6cd9b3a20">size</a>()) {</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <a class="code" href="classsdr_1_1_config_error.html">ConfigError</a> err;</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  err << <span class="stringliteral">"Can not construct FFT plan: input & output buffers are of different size!"</span>;</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">throw</span> err;</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  }</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">if</span> (<a class="code" href="classsdr_1_1_f_f_t_plan.html#a52e13675a3b936b977df3edc5c132c87">_in</a>.<a class="code" href="classsdr_1_1_raw_buffer.html#a944346de6bb972f687716bee921a3bad">isEmpty</a>() || <a class="code" href="classsdr_1_1_f_f_t_plan.html#a58b32e87e4b7bf0f7e6a1ec270c748a3">_out</a>.<a class="code" href="classsdr_1_1_raw_buffer.html#a944346de6bb972f687716bee921a3bad">isEmpty</a>()) {</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <a class="code" href="classsdr_1_1_config_error.html">ConfigError</a> err;</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  err << <span class="stringliteral">"Can not construct FFT plan: input or output buffer is empty!"</span>;</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">throw</span> err;</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  }</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">// Check if N is power of two</span></div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordflow">if</span> (<a class="code" href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e">_N</a> != std::pow(2.0, std::log2(<a class="code" href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e">_N</a>))) {</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  err << <span class="stringliteral">"Can not construct FFT plan: input and output buffer length must be a power of 2!"</span>;</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordflow">throw</span> err;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  }</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// Assemble lookuptable</span></div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordtype">int</span> dir_fac = (dir==FFT::FORWARD) ? 1 : -1;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i=0; i<<a class="code" href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e">_N</a>; i++) {</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <a class="code" href="classsdr_1_1_f_f_t_plan.html#ae9a3563521774be6b902dd67005c26d2">_lut</a>[i] = (std::exp(std::complex<double>(0,(-2*M_PI*i*dir_fac)/N)) * (1<<<a class="code" href="classsdr_1_1_traits.html">Traits<Scalar>::shift</a>));</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  }</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#a9e9efb0511e20fe5a2aa1ef5da4e1aa7"> 48</a></span>  <span class="keyword">virtual</span> <a class="code" href="classsdr_1_1_f_f_t_plan.html#a9e9efb0511e20fe5a2aa1ef5da4e1aa7">~FFTPlan</a>() {</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="classsdr_1_1_f_f_t_plan.html#ae9a3563521774be6b902dd67005c26d2">_lut</a>.<a class="code" href="classsdr_1_1_raw_buffer.html#a8ffd3cbf476c9036bfada9ae8c7c5e05">unref</a>();</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  }</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
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<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#a1cf4df7a8518971168efec090930a248"> 53</a></span>  <span class="keywordtype">void</span> <a class="code" href="classsdr_1_1_f_f_t_plan.html#a1cf4df7a8518971168efec090930a248">operator() </a>() {</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="classsdr_1_1_f_f_t_plan.html#ab5162f0172e3ea20bf2aed4cbacf9be8">_calc</a>(<span class="keyword">reinterpret_cast<</span> std::complex<Scalar> <span class="keyword">></span>(<a class="code" href="classsdr_1_1_f_f_t_plan.html#a52e13675a3b936b977df3edc5c132c87">_in</a>.<a class="code" href="classsdr_1_1_raw_buffer.html#a41429fafa5acac7eb6ab22001fedc3d7">data</a>()),</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">reinterpret_cast<</span> std::complex<Scalar> <span class="keyword">></span>(<a class="code" href="classsdr_1_1_f_f_t_plan.html#a58b32e87e4b7bf0f7e6a1ec270c748a3">_out</a>.<a class="code" href="classsdr_1_1_raw_buffer.html#a41429fafa5acac7eb6ab22001fedc3d7">data</a>()), <a class="code" href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e">_N</a>, 1);</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> </div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="keyword">protected</span>:</div>
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<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#ab5162f0172e3ea20bf2aed4cbacf9be8"> 60</a></span>  <span class="keywordtype">void</span> <a class="code" href="classsdr_1_1_f_f_t_plan.html#ab5162f0172e3ea20bf2aed4cbacf9be8">_calc</a>(std::complex<Scalar> *a, std::complex<Scalar> *b, <span class="keywordtype">size_t</span> N, <span class="keywordtype">size_t</span> stride) {</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">// Recursion exit</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (1 == N) { b[0] = a[0]; <span class="keywordflow">return</span>; }</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// Calc FFT recursive</span></div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="classsdr_1_1_f_f_t_plan.html#ab5162f0172e3ea20bf2aed4cbacf9be8">_calc</a>(a, b, N/2, 2*stride);</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="code" href="classsdr_1_1_f_f_t_plan.html#ab5162f0172e3ea20bf2aed4cbacf9be8">_calc</a>(a+stride, b+N/2, N/2, 2*stride);</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="comment">// Radix-2...</span></div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i=0; i<N/2; i++) {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  std::complex<SScalar> tmp = b[i];</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// I hope that the compiler will turn the (x/(1<<L)) into a (x >> L) if x is an integer...</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  b[i] = tmp + (<a class="code" href="classsdr_1_1_f_f_t_plan.html#ae9a3563521774be6b902dd67005c26d2">_lut</a>[i]*std::complex<SScalar>(b[i+N/2])) / (1<<<a class="code" href="classsdr_1_1_traits.html">Traits<Scalar>::shift</a>);</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  b[i+N/2] = tmp - (<a class="code" href="classsdr_1_1_f_f_t_plan.html#ae9a3563521774be6b902dd67005c26d2">_lut</a>[i]*std::complex<SScalar>(b[i+N/2])) / (1<<<a class="code" href="classsdr_1_1_traits.html">Traits<Scalar>::shift</a>);</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">protected</span>:</div>
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<div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e"> 77</a></span>  <span class="keywordtype">size_t</span> <a class="code" href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e">_N</a>;</div>
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<div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#a52e13675a3b936b977df3edc5c132c87"> 79</a></span>  <a class="code" href="classsdr_1_1_buffer.html">Buffer< std::complex<Scalar></a> > <a class="code" href="classsdr_1_1_f_f_t_plan.html#a52e13675a3b936b977df3edc5c132c87">_in</a>;</div>
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<div class="line"><a name="l00081"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#a58b32e87e4b7bf0f7e6a1ec270c748a3"> 81</a></span>  <a class="code" href="classsdr_1_1_buffer.html">Buffer< std::complex<Scalar></a> > <a class="code" href="classsdr_1_1_f_f_t_plan.html#a58b32e87e4b7bf0f7e6a1ec270c748a3">_out</a>;</div>
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<div class="line"><a name="l00083"></a><span class="lineno"><a class="line" href="classsdr_1_1_f_f_t_plan.html#ae9a3563521774be6b902dd67005c26d2"> 83</a></span>  <a class="code" href="classsdr_1_1_buffer.html">Buffer< std::complex<SScalar></a> > <a class="code" href="classsdr_1_1_f_f_t_plan.html#ae9a3563521774be6b902dd67005c26d2">_lut</a>;</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> };</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> </div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> }</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#endif // __SDR_FFTPLAN_NATIVE_HH__</span></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_a9e9efb0511e20fe5a2aa1ef5da4e1aa7"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#a9e9efb0511e20fe5a2aa1ef5da4e1aa7">sdr::FFTPlan::~FFTPlan</a></div><div class="ttdeci">virtual ~FFTPlan()</div><div class="ttdoc">Destructor. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:48</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_a1cf4df7a8518971168efec090930a248"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#a1cf4df7a8518971168efec090930a248">sdr::FFTPlan::operator()</a></div><div class="ttdeci">void operator()()</div><div class="ttdoc">Performs the FFT. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:53</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_html_a02a2b7ef1f2494d542b133a4995e5344"><div class="ttname"><a href="classsdr_1_1_f_f_t.html#a02a2b7ef1f2494d542b133a4995e5344">sdr::FFT::Direction</a></div><div class="ttdeci">Direction</div><div class="ttdoc">Direction type. </div><div class="ttdef"><b>Definition:</b> fftplan.hh:17</div></div>
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<div class="ttc" id="namespacesdr_html"><div class="ttname"><a href="namespacesdr.html">sdr</a></div><div class="ttdef"><b>Definition:</b> autocast.hh:8</div></div>
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<div class="ttc" id="classsdr_1_1_raw_buffer_html_a944346de6bb972f687716bee921a3bad"><div class="ttname"><a href="classsdr_1_1_raw_buffer.html#a944346de6bb972f687716bee921a3bad">sdr::RawBuffer::isEmpty</a></div><div class="ttdeci">bool isEmpty() const </div><div class="ttdoc">Returns true if the buffer is invalid/empty. </div><div class="ttdef"><b>Definition:</b> buffer.hh:77</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_a52e13675a3b936b977df3edc5c132c87"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#a52e13675a3b936b977df3edc5c132c87">sdr::FFTPlan::_in</a></div><div class="ttdeci">Buffer< std::complex< Scalar > > _in</div><div class="ttdoc">The input buffer. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:79</div></div>
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<div class="ttc" id="classsdr_1_1_buffer_html_ad2232275b51b1189daea15c6cd9b3a20"><div class="ttname"><a href="classsdr_1_1_buffer.html#ad2232275b51b1189daea15c6cd9b3a20">sdr::Buffer::size</a></div><div class="ttdeci">size_t size() const </div><div class="ttdoc">Returns the number of elements of type T in this buffer. </div><div class="ttdef"><b>Definition:</b> buffer.hh:166</div></div>
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<div class="ttc" id="classsdr_1_1_raw_buffer_html_a41429fafa5acac7eb6ab22001fedc3d7"><div class="ttname"><a href="classsdr_1_1_raw_buffer.html#a41429fafa5acac7eb6ab22001fedc3d7">sdr::RawBuffer::data</a></div><div class="ttdeci">char * data() const </div><div class="ttdoc">Returns the pointer to the data of the buffer view. </div><div class="ttdef"><b>Definition:</b> buffer.hh:69</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_a58b32e87e4b7bf0f7e6a1ec270c748a3"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#a58b32e87e4b7bf0f7e6a1ec270c748a3">sdr::FFTPlan::_out</a></div><div class="ttdeci">Buffer< std::complex< Scalar > > _out</div><div class="ttdoc">The output buffer. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:81</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_ab5162f0172e3ea20bf2aed4cbacf9be8"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#ab5162f0172e3ea20bf2aed4cbacf9be8">sdr::FFTPlan::_calc</a></div><div class="ttdeci">void _calc(std::complex< Scalar > *a, std::complex< Scalar > *b, size_t N, size_t stride)</div><div class="ttdoc">Actual FFT implmenetation. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:60</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_ae9a3563521774be6b902dd67005c26d2"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#ae9a3563521774be6b902dd67005c26d2">sdr::FFTPlan::_lut</a></div><div class="ttdeci">Buffer< std::complex< SScalar > > _lut</div><div class="ttdoc">The exp(-i 2 pi k / N) look-up table. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:83</div></div>
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<div class="ttc" id="classsdr_1_1_config_error_html"><div class="ttname"><a href="classsdr_1_1_config_error.html">sdr::ConfigError</a></div><div class="ttdoc">The configuration error class. </div><div class="ttdef"><b>Definition:</b> exception.hh:24</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_a3640c788bea68b27772771b9d73653b9"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#a3640c788bea68b27772771b9d73653b9">sdr::FFTPlan::SScalar</a></div><div class="ttdeci">Traits< Scalar >::SScalar SScalar</div><div class="ttdoc">The super-scalar of the input type. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:15</div></div>
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<div class="ttc" id="classsdr_1_1_raw_buffer_html_a8ffd3cbf476c9036bfada9ae8c7c5e05"><div class="ttname"><a href="classsdr_1_1_raw_buffer.html#a8ffd3cbf476c9036bfada9ae8c7c5e05">sdr::RawBuffer::unref</a></div><div class="ttdeci">void unref()</div><div class="ttdoc">Dereferences the buffer. </div><div class="ttdef"><b>Definition:</b> buffer.cc:63</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_a0797a5d126c311b031f6377b786e328d"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#a0797a5d126c311b031f6377b786e328d">sdr::FFTPlan::FFTPlan</a></div><div class="ttdeci">FFTPlan(const Buffer< std::complex< Scalar > > &in, const Buffer< std::complex< Scalar > > &out, FFT::Direction dir)</div><div class="ttdoc">Constructs a FFT plan for the input and output buffers. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:19</div></div>
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<div class="ttc" id="classsdr_1_1_traits_html"><div class="ttname"><a href="classsdr_1_1_traits.html">sdr::Traits</a></div><div class="ttdoc">Forward declaration of type tratis template. </div><div class="ttdef"><b>Definition:</b> traits.hh:20</div></div>
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<div class="ttc" id="classsdr_1_1_buffer_html"><div class="ttname"><a href="classsdr_1_1_buffer.html">sdr::Buffer</a></div><div class="ttdoc">A typed buffer. </div><div class="ttdef"><b>Definition:</b> buffer.hh:111</div></div>
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<div class="ttc" id="classsdr_1_1_f_f_t_plan_html_a89e50030f9bec2fc66ef18564b3fa49e"><div class="ttname"><a href="classsdr_1_1_f_f_t_plan.html#a89e50030f9bec2fc66ef18564b3fa49e">sdr::FFTPlan::_N</a></div><div class="ttdeci">size_t _N</div><div class="ttdoc">FFT size, needs to be a power of 2. </div><div class="ttdef"><b>Definition:</b> fftplan_native.hh:77</div></div>
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