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author cannam
date Fri, 14 Nov 2008 11:56:54 +0000
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cannam@0 3 <title>VampPluginSDK: PluginInputDomainAdapter.cpp Source File</title>
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cannam@0 22 <h1>PluginInputDomainAdapter.cpp</h1><a href="PluginInputDomainAdapter_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */</span>
cannam@0 23 <a name="l00002"></a>00002
cannam@0 24 <a name="l00003"></a>00003 <span class="comment">/*</span>
cannam@0 25 <a name="l00004"></a>00004 <span class="comment"> Vamp</span>
cannam@0 26 <a name="l00005"></a>00005 <span class="comment"></span>
cannam@0 27 <a name="l00006"></a>00006 <span class="comment"> An API for audio analysis and feature extraction plugins.</span>
cannam@0 28 <a name="l00007"></a>00007 <span class="comment"></span>
cannam@0 29 <a name="l00008"></a>00008 <span class="comment"> Centre for Digital Music, Queen Mary, University of London.</span>
cannam@0 30 <a name="l00009"></a>00009 <span class="comment"> Copyright 2006-2007 Chris Cannam and QMUL.</span>
cannam@0 31 <a name="l00010"></a>00010 <span class="comment"> </span>
cannam@0 32 <a name="l00011"></a>00011 <span class="comment"> This file is based in part on Don Cross's public domain FFT</span>
cannam@0 33 <a name="l00012"></a>00012 <span class="comment"> implementation.</span>
cannam@0 34 <a name="l00013"></a>00013 <span class="comment"></span>
cannam@0 35 <a name="l00014"></a>00014 <span class="comment"> Permission is hereby granted, free of charge, to any person</span>
cannam@0 36 <a name="l00015"></a>00015 <span class="comment"> obtaining a copy of this software and associated documentation</span>
cannam@0 37 <a name="l00016"></a>00016 <span class="comment"> files (the "Software"), to deal in the Software without</span>
cannam@0 38 <a name="l00017"></a>00017 <span class="comment"> restriction, including without limitation the rights to use, copy,</span>
cannam@0 39 <a name="l00018"></a>00018 <span class="comment"> modify, merge, publish, distribute, sublicense, and/or sell copies</span>
cannam@0 40 <a name="l00019"></a>00019 <span class="comment"> of the Software, and to permit persons to whom the Software is</span>
cannam@0 41 <a name="l00020"></a>00020 <span class="comment"> furnished to do so, subject to the following conditions:</span>
cannam@0 42 <a name="l00021"></a>00021 <span class="comment"></span>
cannam@0 43 <a name="l00022"></a>00022 <span class="comment"> The above copyright notice and this permission notice shall be</span>
cannam@0 44 <a name="l00023"></a>00023 <span class="comment"> included in all copies or substantial portions of the Software.</span>
cannam@0 45 <a name="l00024"></a>00024 <span class="comment"></span>
cannam@0 46 <a name="l00025"></a>00025 <span class="comment"> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
cannam@0 47 <a name="l00026"></a>00026 <span class="comment"> EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
cannam@0 48 <a name="l00027"></a>00027 <span class="comment"> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span>
cannam@0 49 <a name="l00028"></a>00028 <span class="comment"> NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR</span>
cannam@0 50 <a name="l00029"></a>00029 <span class="comment"> ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF</span>
cannam@0 51 <a name="l00030"></a>00030 <span class="comment"> CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span>
cannam@0 52 <a name="l00031"></a>00031 <span class="comment"> WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
cannam@0 53 <a name="l00032"></a>00032 <span class="comment"></span>
cannam@0 54 <a name="l00033"></a>00033 <span class="comment"> Except as contained in this notice, the names of the Centre for</span>
cannam@0 55 <a name="l00034"></a>00034 <span class="comment"> Digital Music; Queen Mary, University of London; and Chris Cannam</span>
cannam@0 56 <a name="l00035"></a>00035 <span class="comment"> shall not be used in advertising or otherwise to promote the sale,</span>
cannam@0 57 <a name="l00036"></a>00036 <span class="comment"> use or other dealings in this Software without prior written</span>
cannam@0 58 <a name="l00037"></a>00037 <span class="comment"> authorization.</span>
cannam@0 59 <a name="l00038"></a>00038 <span class="comment">*/</span>
cannam@0 60 <a name="l00039"></a>00039
cannam@0 61 <a name="l00040"></a>00040 <span class="preprocessor">#include "<a class="code" href="PluginInputDomainAdapter_8h.html">PluginInputDomainAdapter.h</a>"</span>
cannam@0 62 <a name="l00041"></a>00041
cannam@0 63 <a name="l00042"></a>00042 <span class="preprocessor">#include &lt;cmath&gt;</span>
cannam@0 64 <a name="l00043"></a>00043
cannam@0 65 <a name="l00044"></a>00044
cannam@0 66 <a name="l00068"></a>00068 <span class="preprocessor">#ifdef HAVE_FFTW3</span>
cannam@0 67 <a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#include &lt;fftw3.h&gt;</span>
cannam@0 68 <a name="l00070"></a>00070 <span class="preprocessor">#endif</span>
cannam@0 69 <a name="l00071"></a>00071 <span class="preprocessor"></span>
cannam@0 70 <a name="l00072"></a>00072
cannam@0 71 <a name="l00073"></a>00073 <span class="keyword">namespace </span>Vamp {
cannam@0 72 <a name="l00074"></a>00074
cannam@0 73 <a name="l00075"></a>00075 <span class="keyword">namespace </span>HostExt {
cannam@0 74 <a name="l00076"></a>00076
cannam@0 75 <a name="l00077"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html">00077</a> <span class="keyword">class </span><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html">PluginInputDomainAdapter::Impl</a>
cannam@0 76 <a name="l00078"></a>00078 {
cannam@0 77 <a name="l00079"></a>00079 <span class="keyword">public</span>:
cannam@0 78 <a name="l00080"></a>00080 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dffa09cc6be98d87cb33c1e92310c9fc">Impl</a>(<a class="code" href="classVamp_1_1Plugin.html" title="Vamp::Plugin is a base class for plugin instance classes that provide feature extraction...">Plugin</a> *plugin, <span class="keywordtype">float</span> inputSampleRate);
cannam@0 79 <a name="l00081"></a>00081 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#2c75fc9191782ee69185c60f9b68cb90">~Impl</a>();
cannam@0 80 <a name="l00082"></a>00082
cannam@0 81 <a name="l00083"></a>00083 <span class="keywordtype">bool</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#58c9bcbddcb7c3a1a3791b2a04e7372e">initialise</a>(<span class="keywordtype">size_t</span> channels, <span class="keywordtype">size_t</span> stepSize, <span class="keywordtype">size_t</span> blockSize);
cannam@0 82 <a name="l00084"></a>00084
cannam@0 83 <a name="l00085"></a>00085 <span class="keywordtype">size_t</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4380af577605306d2edab51042c71681">getPreferredStepSize</a>() <span class="keyword">const</span>;
cannam@0 84 <a name="l00086"></a>00086 <span class="keywordtype">size_t</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#b530681a774b29db3fd059149f4c1bf9">getPreferredBlockSize</a>() <span class="keyword">const</span>;
cannam@0 85 <a name="l00087"></a>00087
cannam@0 86 <a name="l00088"></a>00088 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">FeatureSet</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#1bd8c3ca5ce5d8254d2d4af910cc31f0">process</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> *<span class="keyword">const</span> *inputBuffers, <a class="code" href="structVamp_1_1RealTime.html" title="RealTime represents time values to nanosecond precision with accurate arithmetic...">RealTime</a> timestamp);
cannam@0 87 <a name="l00089"></a>00089
cannam@0 88 <a name="l00090"></a>00090 <span class="keyword">protected</span>:
cannam@0 89 <a name="l00091"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">00091</a> <a class="code" href="classVamp_1_1Plugin.html" title="Vamp::Plugin is a base class for plugin instance classes that provide feature extraction...">Plugin</a> *<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>;
cannam@0 90 <a name="l00092"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#bafd656a3bf6d74d6dd38def0c73cc57">00092</a> <span class="keywordtype">float</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#bafd656a3bf6d74d6dd38def0c73cc57">m_inputSampleRate</a>;
cannam@0 91 <a name="l00093"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">00093</a> <span class="keywordtype">int</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a>;
cannam@0 92 <a name="l00094"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">00094</a> <span class="keywordtype">int</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a>;
cannam@0 93 <a name="l00095"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">00095</a> <span class="keywordtype">float</span> **<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>;
cannam@0 94 <a name="l00096"></a>00096
cannam@0 95 <a name="l00097"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">00097</a> <span class="keywordtype">double</span> *<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>;
cannam@0 96 <a name="l00098"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a43f6ea4727b9bb29d6d66869886d15e">00098</a> <span class="keywordtype">double</span> *<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a43f6ea4727b9bb29d6d66869886d15e">m_window</a>;
cannam@0 97 <a name="l00099"></a>00099
cannam@0 98 <a name="l00100"></a>00100 <span class="preprocessor">#ifdef HAVE_FFTW3</span>
cannam@0 99 <a name="l00101"></a>00101 <span class="preprocessor"></span> fftw_plan m_plan;
cannam@0 100 <a name="l00102"></a>00102 fftw_complex *m_cbuf;
cannam@0 101 <a name="l00103"></a>00103 <span class="preprocessor">#else</span>
cannam@0 102 <a name="l00104"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#6407b3c17dc96ba7036f2161b1aa30cb">00104</a> <span class="preprocessor"></span> <span class="keywordtype">double</span> *<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#6407b3c17dc96ba7036f2161b1aa30cb">m_ro</a>;
cannam@0 103 <a name="l00105"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4d73b85b9ba00c10b55be4febc56dfc4">00105</a> <span class="keywordtype">double</span> *<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4d73b85b9ba00c10b55be4febc56dfc4">m_io</a>;
cannam@0 104 <a name="l00106"></a>00106 <span class="keywordtype">void</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#7ea985ca8cdc45dd156e8d50293c3085">fft</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> n, <span class="keywordtype">bool</span> inverse,
cannam@0 105 <a name="l00107"></a>00107 <span class="keywordtype">double</span> *ri, <span class="keywordtype">double</span> *ii, <span class="keywordtype">double</span> *ro, <span class="keywordtype">double</span> *io);
cannam@0 106 <a name="l00108"></a>00108 <span class="preprocessor">#endif</span>
cannam@0 107 <a name="l00109"></a>00109 <span class="preprocessor"></span>
cannam@0 108 <a name="l00110"></a>00110 <span class="keywordtype">size_t</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#76073669d78c0681a3b3a9e71da86ae6">makeBlockSizeAcceptable</a>(<span class="keywordtype">size_t</span>) <span class="keyword">const</span>;
cannam@0 109 <a name="l00111"></a>00111 };
cannam@0 110 <a name="l00112"></a>00112
cannam@0 111 <a name="l00113"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#878e7275acdb77efc7a802944305039d">00113</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#878e7275acdb77efc7a802944305039d">PluginInputDomainAdapter::PluginInputDomainAdapter</a>(<a class="code" href="classVamp_1_1Plugin.html" title="Vamp::Plugin is a base class for plugin instance classes that provide feature extraction...">Plugin</a> *plugin) :
cannam@0 112 <a name="l00114"></a>00114 <a class="code" href="classVamp_1_1HostExt_1_1PluginWrapper.html" title="PluginWrapper is a simple base class for adapter plugins.">PluginWrapper</a>(plugin)
cannam@0 113 <a name="l00115"></a>00115 {
cannam@0 114 <a name="l00116"></a>00116 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#9fa8a6b8a4e41b6e3f2fabc0d23678cc">m_impl</a> = <span class="keyword">new</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html">Impl</a>(plugin, <a class="code" href="classVamp_1_1Plugin.html#59b9dd82a4f4eb946cd0474cc81abc23">m_inputSampleRate</a>);
cannam@0 115 <a name="l00117"></a>00117 }
cannam@0 116 <a name="l00118"></a>00118
cannam@0 117 <a name="l00119"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#ec457c952155adf516dd8e3dc7739321">00119</a> PluginInputDomainAdapter::~PluginInputDomainAdapter()
cannam@0 118 <a name="l00120"></a>00120 {
cannam@0 119 <a name="l00121"></a>00121 <span class="keyword">delete</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#9fa8a6b8a4e41b6e3f2fabc0d23678cc">m_impl</a>;
cannam@0 120 <a name="l00122"></a>00122 }
cannam@0 121 <a name="l00123"></a>00123
cannam@0 122 <a name="l00124"></a>00124 <span class="keywordtype">bool</span>
cannam@0 123 <a name="l00125"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#72d201eca10ec73bf16e07984f58f94c">00125</a> PluginInputDomainAdapter::initialise(<span class="keywordtype">size_t</span> channels, <span class="keywordtype">size_t</span> stepSize, <span class="keywordtype">size_t</span> blockSize)
cannam@0 124 <a name="l00126"></a>00126 {
cannam@0 125 <a name="l00127"></a>00127 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#9fa8a6b8a4e41b6e3f2fabc0d23678cc">m_impl</a>-&gt;<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#58c9bcbddcb7c3a1a3791b2a04e7372e">initialise</a>(channels, stepSize, blockSize);
cannam@0 126 <a name="l00128"></a>00128 }
cannam@0 127 <a name="l00129"></a>00129
cannam@0 128 <a name="l00130"></a>00130 <a class="code" href="classVamp_1_1Plugin.html#39cb7649d6dcc20e4cb1640cd55907bc">Plugin::InputDomain</a>
cannam@0 129 <a name="l00131"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#376fa97a1c721255541fe35d71368976">00131</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#376fa97a1c721255541fe35d71368976" title="Get the plugin&amp;#39;s required input domain.">PluginInputDomainAdapter::getInputDomain</a>()<span class="keyword"> const</span>
cannam@0 130 <a name="l00132"></a>00132 <span class="keyword"></span>{
cannam@0 131 <a name="l00133"></a>00133 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1Plugin.html#39cb7649d6dcc20e4cb1640cd55907bcd4a9f31b958a43a9757af7893aa2e7ff">TimeDomain</a>;
cannam@0 132 <a name="l00134"></a>00134 }
cannam@0 133 <a name="l00135"></a>00135
cannam@0 134 <a name="l00136"></a>00136 <span class="keywordtype">size_t</span>
cannam@0 135 <a name="l00137"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#d979af9f1cbf2eeb16f4eaedb4a4f565">00137</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#d979af9f1cbf2eeb16f4eaedb4a4f565" title="Get the preferred step size (window increment -- the distance in sample frames between...">PluginInputDomainAdapter::getPreferredStepSize</a>()<span class="keyword"> const</span>
cannam@0 136 <a name="l00138"></a>00138 <span class="keyword"></span>{
cannam@0 137 <a name="l00139"></a>00139 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#9fa8a6b8a4e41b6e3f2fabc0d23678cc">m_impl</a>-&gt;<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4380af577605306d2edab51042c71681">getPreferredStepSize</a>();
cannam@0 138 <a name="l00140"></a>00140 }
cannam@0 139 <a name="l00141"></a>00141
cannam@0 140 <a name="l00142"></a>00142 <span class="keywordtype">size_t</span>
cannam@0 141 <a name="l00143"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#4cf40d09d02022b1962ff17bb0324ea5">00143</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#4cf40d09d02022b1962ff17bb0324ea5" title="Get the preferred block size (window size -- the number of sample frames passed in...">PluginInputDomainAdapter::getPreferredBlockSize</a>()<span class="keyword"> const</span>
cannam@0 142 <a name="l00144"></a>00144 <span class="keyword"></span>{
cannam@0 143 <a name="l00145"></a>00145 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#9fa8a6b8a4e41b6e3f2fabc0d23678cc">m_impl</a>-&gt;<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#b530681a774b29db3fd059149f4c1bf9">getPreferredBlockSize</a>();
cannam@0 144 <a name="l00146"></a>00146 }
cannam@0 145 <a name="l00147"></a>00147
cannam@0 146 <a name="l00148"></a>00148 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">Plugin::FeatureSet</a>
cannam@0 147 <a name="l00149"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#0867737693c16801d40a6adbde07ec07">00149</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#0867737693c16801d40a6adbde07ec07" title="Process a single block of input data.">PluginInputDomainAdapter::process</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> *<span class="keyword">const</span> *inputBuffers, <a class="code" href="structVamp_1_1RealTime.html" title="RealTime represents time values to nanosecond precision with accurate arithmetic...">RealTime</a> timestamp)
cannam@0 148 <a name="l00150"></a>00150 {
cannam@0 149 <a name="l00151"></a>00151 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter.html#9fa8a6b8a4e41b6e3f2fabc0d23678cc">m_impl</a>-&gt;<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#1bd8c3ca5ce5d8254d2d4af910cc31f0">process</a>(inputBuffers, timestamp);
cannam@0 150 <a name="l00152"></a>00152 }
cannam@0 151 <a name="l00153"></a>00153
cannam@0 152 <a name="l00154"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dffa09cc6be98d87cb33c1e92310c9fc">00154</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dffa09cc6be98d87cb33c1e92310c9fc">PluginInputDomainAdapter::Impl::Impl</a>(<a class="code" href="classVamp_1_1Plugin.html" title="Vamp::Plugin is a base class for plugin instance classes that provide feature extraction...">Plugin</a> *plugin, <span class="keywordtype">float</span> inputSampleRate) :
cannam@0 153 <a name="l00155"></a>00155 <a class="code" href="classVamp_1_1HostExt_1_1PluginWrapper.html#b4e40ecd98b445e1a2aa9e7baa280ea2">m_plugin</a>(plugin),
cannam@0 154 <a name="l00156"></a>00156 <a class="code" href="classVamp_1_1Plugin.html#59b9dd82a4f4eb946cd0474cc81abc23">m_inputSampleRate</a>(inputSampleRate),
cannam@0 155 <a name="l00157"></a>00157 m_channels(0),
cannam@0 156 <a name="l00158"></a>00158 m_blockSize(0),
cannam@0 157 <a name="l00159"></a>00159 m_freqbuf(0),
cannam@0 158 <a name="l00160"></a>00160 m_ri(0),
cannam@0 159 <a name="l00161"></a>00161 m_window(0),
cannam@0 160 <a name="l00162"></a>00162 #ifdef HAVE_FFTW3
cannam@0 161 <a name="l00163"></a>00163 m_plan(0),
cannam@0 162 <a name="l00164"></a>00164 m_cbuf(0)
cannam@0 163 <a name="l00165"></a>00165 #else
cannam@0 164 <a name="l00166"></a>00166 m_ro(0),
cannam@0 165 <a name="l00167"></a>00167 m_io(0)
cannam@0 166 <a name="l00168"></a>00168 #endif
cannam@0 167 <a name="l00169"></a>00169 {
cannam@0 168 <a name="l00170"></a>00170 }
cannam@0 169 <a name="l00171"></a>00171
cannam@0 170 <a name="l00172"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#2c75fc9191782ee69185c60f9b68cb90">00172</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#2c75fc9191782ee69185c60f9b68cb90">PluginInputDomainAdapter::Impl::~Impl</a>()
cannam@0 171 <a name="l00173"></a>00173 {
cannam@0 172 <a name="l00174"></a>00174 <span class="comment">// the adapter will delete the plugin</span>
cannam@0 173 <a name="l00175"></a>00175
cannam@0 174 <a name="l00176"></a>00176 <span class="keywordflow">if</span> (<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a> &gt; 0) {
cannam@0 175 <a name="l00177"></a>00177 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c &lt; <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a>; ++c) {
cannam@0 176 <a name="l00178"></a>00178 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>[c];
cannam@0 177 <a name="l00179"></a>00179 }
cannam@0 178 <a name="l00180"></a>00180 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>;
cannam@0 179 <a name="l00181"></a>00181 <span class="preprocessor">#ifdef HAVE_FFTW3</span>
cannam@0 180 <a name="l00182"></a>00182 <span class="preprocessor"></span> <span class="keywordflow">if</span> (m_plan) {
cannam@0 181 <a name="l00183"></a>00183 fftw_destroy_plan(m_plan);
cannam@0 182 <a name="l00184"></a>00184 fftw_free(<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>);
cannam@0 183 <a name="l00185"></a>00185 fftw_free(m_cbuf);
cannam@0 184 <a name="l00186"></a>00186 m_plan = 0;
cannam@0 185 <a name="l00187"></a>00187 }
cannam@0 186 <a name="l00188"></a>00188 <span class="preprocessor">#else</span>
cannam@0 187 <a name="l00189"></a>00189 <span class="preprocessor"></span> <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>;
cannam@0 188 <a name="l00190"></a>00190 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#6407b3c17dc96ba7036f2161b1aa30cb">m_ro</a>;
cannam@0 189 <a name="l00191"></a>00191 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4d73b85b9ba00c10b55be4febc56dfc4">m_io</a>;
cannam@0 190 <a name="l00192"></a>00192 <span class="preprocessor">#endif</span>
cannam@0 191 <a name="l00193"></a>00193 <span class="preprocessor"></span> <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a43f6ea4727b9bb29d6d66869886d15e">m_window</a>;
cannam@0 192 <a name="l00194"></a>00194 }
cannam@0 193 <a name="l00195"></a>00195 }
cannam@0 194 <a name="l00196"></a>00196
cannam@0 195 <a name="l00197"></a>00197 <span class="comment">// for some visual studii apparently</span>
cannam@0 196 <a name="l00198"></a>00198 <span class="preprocessor">#ifndef M_PI</span>
cannam@0 197 <a name="l00199"></a><a class="code" href="PluginInputDomainAdapter_8cpp.html#e71449b1cc6e6250b91f539153a7a0d3">00199</a> <span class="preprocessor"></span><span class="preprocessor">#define M_PI 3.14159265358979232846</span>
cannam@0 198 <a name="l00200"></a>00200 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
cannam@0 199 <a name="l00201"></a>00201 <span class="preprocessor"></span>
cannam@0 200 <a name="l00202"></a>00202 <span class="keywordtype">bool</span>
cannam@0 201 <a name="l00203"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#58c9bcbddcb7c3a1a3791b2a04e7372e">00203</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#58c9bcbddcb7c3a1a3791b2a04e7372e">PluginInputDomainAdapter::Impl::initialise</a>(<span class="keywordtype">size_t</span> channels, <span class="keywordtype">size_t</span> stepSize, <span class="keywordtype">size_t</span> blockSize)
cannam@0 202 <a name="l00204"></a>00204 {
cannam@0 203 <a name="l00205"></a>00205 <span class="keywordflow">if</span> (<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#e1d317a9702cbeda65ddf0ec500c1ff6" title="Get the plugin&amp;#39;s required input domain.">getInputDomain</a>() == <a class="code" href="classVamp_1_1Plugin.html#39cb7649d6dcc20e4cb1640cd55907bcd4a9f31b958a43a9757af7893aa2e7ff">TimeDomain</a>) {
cannam@0 204 <a name="l00206"></a>00206
cannam@0 205 <a name="l00207"></a>00207 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a> = int(blockSize);
cannam@0 206 <a name="l00208"></a>00208 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a> = int(channels);
cannam@0 207 <a name="l00209"></a>00209
cannam@0 208 <a name="l00210"></a>00210 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#f26212cf5fc511b603a8b48034247822" title="Initialise a plugin to prepare it for use with the given number of input channels...">initialise</a>(channels, stepSize, blockSize);
cannam@0 209 <a name="l00211"></a>00211 }
cannam@0 210 <a name="l00212"></a>00212
cannam@0 211 <a name="l00213"></a>00213 <span class="keywordflow">if</span> (blockSize &lt; 2) {
cannam@0 212 <a name="l00214"></a>00214 std::cerr &lt;&lt; <span class="stringliteral">"ERROR: Vamp::HostExt::PluginInputDomainAdapter::Impl::initialise: blocksize &lt; 2 not supported"</span> &lt;&lt; std::endl;
cannam@0 213 <a name="l00215"></a>00215 <span class="keywordflow">return</span> <span class="keyword">false</span>;
cannam@0 214 <a name="l00216"></a>00216 }
cannam@0 215 <a name="l00217"></a>00217
cannam@0 216 <a name="l00218"></a>00218 <span class="keywordflow">if</span> (blockSize &amp; (blockSize-1)) {
cannam@0 217 <a name="l00219"></a>00219 std::cerr &lt;&lt; <span class="stringliteral">"ERROR: Vamp::HostExt::PluginInputDomainAdapter::Impl::initialise: non-power-of-two\nblocksize "</span> &lt;&lt; blockSize &lt;&lt; <span class="stringliteral">" not supported"</span> &lt;&lt; std::endl;
cannam@0 218 <a name="l00220"></a>00220 <span class="keywordflow">return</span> <span class="keyword">false</span>;
cannam@0 219 <a name="l00221"></a>00221 }
cannam@0 220 <a name="l00222"></a>00222
cannam@0 221 <a name="l00223"></a>00223 <span class="keywordflow">if</span> (<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a> &gt; 0) {
cannam@0 222 <a name="l00224"></a>00224 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c &lt; <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a>; ++c) {
cannam@0 223 <a name="l00225"></a>00225 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>[c];
cannam@0 224 <a name="l00226"></a>00226 }
cannam@0 225 <a name="l00227"></a>00227 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>;
cannam@0 226 <a name="l00228"></a>00228 <span class="preprocessor">#ifdef HAVE_FFTW3</span>
cannam@0 227 <a name="l00229"></a>00229 <span class="preprocessor"></span> <span class="keywordflow">if</span> (m_plan) {
cannam@0 228 <a name="l00230"></a>00230 fftw_destroy_plan(m_plan);
cannam@0 229 <a name="l00231"></a>00231 fftw_free(<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>);
cannam@0 230 <a name="l00232"></a>00232 fftw_free(m_cbuf);
cannam@0 231 <a name="l00233"></a>00233 m_plan = 0;
cannam@0 232 <a name="l00234"></a>00234 }
cannam@0 233 <a name="l00235"></a>00235 <span class="preprocessor">#else</span>
cannam@0 234 <a name="l00236"></a>00236 <span class="preprocessor"></span> <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>;
cannam@0 235 <a name="l00237"></a>00237 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#6407b3c17dc96ba7036f2161b1aa30cb">m_ro</a>;
cannam@0 236 <a name="l00238"></a>00238 <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4d73b85b9ba00c10b55be4febc56dfc4">m_io</a>;
cannam@0 237 <a name="l00239"></a>00239 <span class="preprocessor">#endif</span>
cannam@0 238 <a name="l00240"></a>00240 <span class="preprocessor"></span> <span class="keyword">delete</span>[] <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a43f6ea4727b9bb29d6d66869886d15e">m_window</a>;
cannam@0 239 <a name="l00241"></a>00241 }
cannam@0 240 <a name="l00242"></a>00242
cannam@0 241 <a name="l00243"></a>00243 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a> = int(blockSize);
cannam@0 242 <a name="l00244"></a>00244 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a> = int(channels);
cannam@0 243 <a name="l00245"></a>00245
cannam@0 244 <a name="l00246"></a>00246 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a> = <span class="keyword">new</span> <span class="keywordtype">float</span> *[<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a>];
cannam@0 245 <a name="l00247"></a>00247 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c &lt; <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a>; ++c) {
cannam@0 246 <a name="l00248"></a>00248 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>[c] = <span class="keyword">new</span> <span class="keywordtype">float</span>[<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a> + 2];
cannam@0 247 <a name="l00249"></a>00249 }
cannam@0 248 <a name="l00250"></a>00250 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a43f6ea4727b9bb29d6d66869886d15e">m_window</a> = <span class="keyword">new</span> <span class="keywordtype">double</span>[<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a>];
cannam@0 249 <a name="l00251"></a>00251
cannam@0 250 <a name="l00252"></a>00252 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a>; ++i) {
cannam@0 251 <a name="l00253"></a>00253 <span class="comment">// Hanning window</span>
cannam@0 252 <a name="l00254"></a>00254 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a43f6ea4727b9bb29d6d66869886d15e">m_window</a>[i] = (0.50 - 0.50 * cos((2.0 * <a class="code" href="PluginInputDomainAdapter_8cpp.html#e71449b1cc6e6250b91f539153a7a0d3">M_PI</a> * i) / m_blockSize));
cannam@0 253 <a name="l00255"></a>00255 }
cannam@0 254 <a name="l00256"></a>00256
cannam@0 255 <a name="l00257"></a>00257 <span class="preprocessor">#ifdef HAVE_FFTW3</span>
cannam@0 256 <a name="l00258"></a>00258 <span class="preprocessor"></span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a> = (<span class="keywordtype">double</span> *)fftw_malloc(blockSize * <span class="keyword">sizeof</span>(<span class="keywordtype">double</span>));
cannam@0 257 <a name="l00259"></a>00259 m_cbuf = (fftw_complex *)fftw_malloc((blockSize/2 + 1) * <span class="keyword">sizeof</span>(fftw_complex));
cannam@0 258 <a name="l00260"></a>00260 m_plan = fftw_plan_dft_r2c_1d(blockSize, <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>, m_cbuf, FFTW_MEASURE);
cannam@0 259 <a name="l00261"></a>00261 <span class="preprocessor">#else</span>
cannam@0 260 <a name="l00262"></a>00262 <span class="preprocessor"></span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a> = <span class="keyword">new</span> <span class="keywordtype">double</span>[m_blockSize];
cannam@0 261 <a name="l00263"></a>00263 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#6407b3c17dc96ba7036f2161b1aa30cb">m_ro</a> = <span class="keyword">new</span> <span class="keywordtype">double</span>[m_blockSize];
cannam@0 262 <a name="l00264"></a>00264 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4d73b85b9ba00c10b55be4febc56dfc4">m_io</a> = <span class="keyword">new</span> <span class="keywordtype">double</span>[m_blockSize];
cannam@0 263 <a name="l00265"></a>00265 <span class="preprocessor">#endif</span>
cannam@0 264 <a name="l00266"></a>00266 <span class="preprocessor"></span>
cannam@0 265 <a name="l00267"></a>00267 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#f26212cf5fc511b603a8b48034247822" title="Initialise a plugin to prepare it for use with the given number of input channels...">initialise</a>(channels, stepSize, blockSize);
cannam@0 266 <a name="l00268"></a>00268 }
cannam@0 267 <a name="l00269"></a>00269
cannam@0 268 <a name="l00270"></a>00270 <span class="keywordtype">size_t</span>
cannam@0 269 <a name="l00271"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4380af577605306d2edab51042c71681">00271</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4380af577605306d2edab51042c71681">PluginInputDomainAdapter::Impl::getPreferredStepSize</a>()<span class="keyword"> const</span>
cannam@0 270 <a name="l00272"></a>00272 <span class="keyword"></span>{
cannam@0 271 <a name="l00273"></a>00273 <span class="keywordtype">size_t</span> step = <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#514c716c22f81c055f19b56c3f882567" title="Get the preferred step size (window increment -- the distance in sample frames between...">getPreferredStepSize</a>();
cannam@0 272 <a name="l00274"></a>00274
cannam@0 273 <a name="l00275"></a>00275 <span class="keywordflow">if</span> (step == 0 &amp;&amp; (<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#e1d317a9702cbeda65ddf0ec500c1ff6" title="Get the plugin&amp;#39;s required input domain.">getInputDomain</a>() == <a class="code" href="classVamp_1_1Plugin.html#39cb7649d6dcc20e4cb1640cd55907bca30e7877ab33f76acbdca28607e6ab53">FrequencyDomain</a>)) {
cannam@0 274 <a name="l00276"></a>00276 step = <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#b530681a774b29db3fd059149f4c1bf9">getPreferredBlockSize</a>() / 2;
cannam@0 275 <a name="l00277"></a>00277 }
cannam@0 276 <a name="l00278"></a>00278
cannam@0 277 <a name="l00279"></a>00279 <span class="keywordflow">return</span> step;
cannam@0 278 <a name="l00280"></a>00280 }
cannam@0 279 <a name="l00281"></a>00281
cannam@0 280 <a name="l00282"></a>00282 <span class="keywordtype">size_t</span>
cannam@0 281 <a name="l00283"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#b530681a774b29db3fd059149f4c1bf9">00283</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#b530681a774b29db3fd059149f4c1bf9">PluginInputDomainAdapter::Impl::getPreferredBlockSize</a>()<span class="keyword"> const</span>
cannam@0 282 <a name="l00284"></a>00284 <span class="keyword"></span>{
cannam@0 283 <a name="l00285"></a>00285 <span class="keywordtype">size_t</span> block = <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#a529adf83f87a603954eb31407602aac" title="Get the preferred block size (window size -- the number of sample frames passed in...">getPreferredBlockSize</a>();
cannam@0 284 <a name="l00286"></a>00286
cannam@0 285 <a name="l00287"></a>00287 <span class="keywordflow">if</span> (<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#e1d317a9702cbeda65ddf0ec500c1ff6" title="Get the plugin&amp;#39;s required input domain.">getInputDomain</a>() == <a class="code" href="classVamp_1_1Plugin.html#39cb7649d6dcc20e4cb1640cd55907bca30e7877ab33f76acbdca28607e6ab53">FrequencyDomain</a>) {
cannam@0 286 <a name="l00288"></a>00288 <span class="keywordflow">if</span> (block == 0) {
cannam@0 287 <a name="l00289"></a>00289 block = 1024;
cannam@0 288 <a name="l00290"></a>00290 } <span class="keywordflow">else</span> {
cannam@0 289 <a name="l00291"></a>00291 block = <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#76073669d78c0681a3b3a9e71da86ae6">makeBlockSizeAcceptable</a>(block);
cannam@0 290 <a name="l00292"></a>00292 }
cannam@0 291 <a name="l00293"></a>00293 }
cannam@0 292 <a name="l00294"></a>00294
cannam@0 293 <a name="l00295"></a>00295 <span class="keywordflow">return</span> block;
cannam@0 294 <a name="l00296"></a>00296 }
cannam@0 295 <a name="l00297"></a>00297
cannam@0 296 <a name="l00298"></a>00298 <span class="keywordtype">size_t</span>
cannam@0 297 <a name="l00299"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#76073669d78c0681a3b3a9e71da86ae6">00299</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#76073669d78c0681a3b3a9e71da86ae6">PluginInputDomainAdapter::Impl::makeBlockSizeAcceptable</a>(<span class="keywordtype">size_t</span> blockSize)<span class="keyword"> const</span>
cannam@0 298 <a name="l00300"></a>00300 <span class="keyword"></span>{
cannam@0 299 <a name="l00301"></a>00301 <span class="keywordflow">if</span> (blockSize &lt; 2) {
cannam@0 300 <a name="l00302"></a>00302
cannam@0 301 <a name="l00303"></a>00303 std::cerr &lt;&lt; <span class="stringliteral">"WARNING: Vamp::HostExt::PluginInputDomainAdapter::Impl::initialise: blocksize &lt; 2 not"</span> &lt;&lt; std::endl
cannam@0 302 <a name="l00304"></a>00304 &lt;&lt; <span class="stringliteral">"supported, increasing from "</span> &lt;&lt; blockSize &lt;&lt; <span class="stringliteral">" to 2"</span> &lt;&lt; std::endl;
cannam@0 303 <a name="l00305"></a>00305 blockSize = 2;
cannam@0 304 <a name="l00306"></a>00306
cannam@0 305 <a name="l00307"></a>00307 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (blockSize &amp; (blockSize-1)) {
cannam@0 306 <a name="l00308"></a>00308
cannam@0 307 <a name="l00309"></a>00309 <span class="preprocessor">#ifdef HAVE_FFTW3</span>
cannam@0 308 <a name="l00310"></a>00310 <span class="preprocessor"></span> <span class="comment">// not an issue with FFTW</span>
cannam@0 309 <a name="l00311"></a>00311 <span class="preprocessor">#else</span>
cannam@0 310 <a name="l00312"></a>00312 <span class="preprocessor"></span>
cannam@0 311 <a name="l00313"></a>00313 <span class="comment">// not a power of two, can't handle that with our built-in FFT</span>
cannam@0 312 <a name="l00314"></a>00314 <span class="comment">// implementation</span>
cannam@0 313 <a name="l00315"></a>00315
cannam@0 314 <a name="l00316"></a>00316 <span class="keywordtype">size_t</span> nearest = blockSize;
cannam@0 315 <a name="l00317"></a>00317 <span class="keywordtype">size_t</span> power = 0;
cannam@0 316 <a name="l00318"></a>00318 <span class="keywordflow">while</span> (nearest &gt; 1) {
cannam@0 317 <a name="l00319"></a>00319 nearest &gt;&gt;= 1;
cannam@0 318 <a name="l00320"></a>00320 ++power;
cannam@0 319 <a name="l00321"></a>00321 }
cannam@0 320 <a name="l00322"></a>00322 nearest = 1;
cannam@0 321 <a name="l00323"></a>00323 <span class="keywordflow">while</span> (power) {
cannam@0 322 <a name="l00324"></a>00324 nearest &lt;&lt;= 1;
cannam@0 323 <a name="l00325"></a>00325 --power;
cannam@0 324 <a name="l00326"></a>00326 }
cannam@0 325 <a name="l00327"></a>00327
cannam@0 326 <a name="l00328"></a>00328 <span class="keywordflow">if</span> (blockSize - nearest &gt; (nearest*2) - blockSize) {
cannam@0 327 <a name="l00329"></a>00329 nearest = nearest*2;
cannam@0 328 <a name="l00330"></a>00330 }
cannam@0 329 <a name="l00331"></a>00331
cannam@0 330 <a name="l00332"></a>00332 std::cerr &lt;&lt; <span class="stringliteral">"WARNING: Vamp::HostExt::PluginInputDomainAdapter::Impl::initialise: non-power-of-two\nblocksize "</span> &lt;&lt; blockSize &lt;&lt; <span class="stringliteral">" not supported, using blocksize "</span> &lt;&lt; nearest &lt;&lt; <span class="stringliteral">" instead"</span> &lt;&lt; std::endl;
cannam@0 331 <a name="l00333"></a>00333 blockSize = nearest;
cannam@0 332 <a name="l00334"></a>00334
cannam@0 333 <a name="l00335"></a>00335 <span class="preprocessor">#endif</span>
cannam@0 334 <a name="l00336"></a>00336 <span class="preprocessor"></span> }
cannam@0 335 <a name="l00337"></a>00337
cannam@0 336 <a name="l00338"></a>00338 <span class="keywordflow">return</span> blockSize;
cannam@0 337 <a name="l00339"></a>00339 }
cannam@0 338 <a name="l00340"></a>00340
cannam@0 339 <a name="l00341"></a>00341 <a class="code" href="classVamp_1_1Plugin.html#448fb57dc245d47923ec9eeaf9856c5f">Plugin::FeatureSet</a>
cannam@0 340 <a name="l00342"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#1bd8c3ca5ce5d8254d2d4af910cc31f0">00342</a> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#1bd8c3ca5ce5d8254d2d4af910cc31f0">PluginInputDomainAdapter::Impl::process</a>(<span class="keyword">const</span> <span class="keywordtype">float</span> *<span class="keyword">const</span> *inputBuffers,
cannam@0 341 <a name="l00343"></a>00343 <a class="code" href="structVamp_1_1RealTime.html" title="RealTime represents time values to nanosecond precision with accurate arithmetic...">RealTime</a> timestamp)
cannam@0 342 <a name="l00344"></a>00344 {
cannam@0 343 <a name="l00345"></a>00345 <span class="keywordflow">if</span> (<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#e1d317a9702cbeda65ddf0ec500c1ff6" title="Get the plugin&amp;#39;s required input domain.">getInputDomain</a>() == <a class="code" href="classVamp_1_1Plugin.html#39cb7649d6dcc20e4cb1640cd55907bcd4a9f31b958a43a9757af7893aa2e7ff">TimeDomain</a>) {
cannam@0 344 <a name="l00346"></a>00346 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#e4aed3bebfe80a2e2fccd3d37af26996" title="Process a single block of input data.">process</a>(inputBuffers, timestamp);
cannam@0 345 <a name="l00347"></a>00347 }
cannam@0 346 <a name="l00348"></a>00348
cannam@0 347 <a name="l00349"></a>00349 <span class="comment">// The timestamp supplied should be (according to the Vamp::Plugin</span>
cannam@0 348 <a name="l00350"></a>00350 <span class="comment">// spec) the time of the start of the time-domain input block.</span>
cannam@0 349 <a name="l00351"></a>00351 <span class="comment">// However, we want to pass to the plugin an FFT output calculated</span>
cannam@0 350 <a name="l00352"></a>00352 <span class="comment">// from the block of samples _centred_ on that timestamp.</span>
cannam@0 351 <a name="l00353"></a>00353 <span class="comment">// </span>
cannam@0 352 <a name="l00354"></a>00354 <span class="comment">// We have two options:</span>
cannam@0 353 <a name="l00355"></a>00355 <span class="comment">// </span>
cannam@0 354 <a name="l00356"></a>00356 <span class="comment">// 1. Buffer the input, calculating the fft of the values at the</span>
cannam@0 355 <a name="l00357"></a>00357 <span class="comment">// passed-in block minus blockSize/2 rather than starting at the</span>
cannam@0 356 <a name="l00358"></a>00358 <span class="comment">// passed-in block. So each time we call process on the plugin,</span>
cannam@0 357 <a name="l00359"></a>00359 <span class="comment">// we are passing in the same timestamp as was passed to our own</span>
cannam@0 358 <a name="l00360"></a>00360 <span class="comment">// process plugin, but not (the frequency domain representation</span>
cannam@0 359 <a name="l00361"></a>00361 <span class="comment">// of) the same set of samples. Advantages: avoids confusion in</span>
cannam@0 360 <a name="l00362"></a>00362 <span class="comment">// the host by ensuring the returned values have timestamps</span>
cannam@0 361 <a name="l00363"></a>00363 <span class="comment">// comparable with that passed in to this function (in fact this</span>
cannam@0 362 <a name="l00364"></a>00364 <span class="comment">// is pretty much essential for one-value-per-block outputs);</span>
cannam@0 363 <a name="l00365"></a>00365 <span class="comment">// consistent with hosts such as SV that deal with the</span>
cannam@0 364 <a name="l00366"></a>00366 <span class="comment">// frequency-domain transform themselves. Disadvantages: means</span>
cannam@0 365 <a name="l00367"></a>00367 <span class="comment">// making the not necessarily correct assumption that the samples</span>
cannam@0 366 <a name="l00368"></a>00368 <span class="comment">// preceding the first official block are all zero (or some other</span>
cannam@0 367 <a name="l00369"></a>00369 <span class="comment">// known value).</span>
cannam@0 368 <a name="l00370"></a>00370 <span class="comment">//</span>
cannam@0 369 <a name="l00371"></a>00371 <span class="comment">// 2. Increase the passed-in timestamps by half the blocksize. So</span>
cannam@0 370 <a name="l00372"></a>00372 <span class="comment">// when we call process, we are passing in the frequency domain</span>
cannam@0 371 <a name="l00373"></a>00373 <span class="comment">// representation of the same set of samples as passed to us, but</span>
cannam@0 372 <a name="l00374"></a>00374 <span class="comment">// with a different timestamp. Advantages: simplicity; avoids</span>
cannam@0 373 <a name="l00375"></a>00375 <span class="comment">// iffy assumption mentioned above. Disadvantages: inconsistency</span>
cannam@0 374 <a name="l00376"></a>00376 <span class="comment">// with SV in cases where stepSize != blockSize/2; potential</span>
cannam@0 375 <a name="l00377"></a>00377 <span class="comment">// confusion arising from returned timestamps being calculated</span>
cannam@0 376 <a name="l00378"></a>00378 <span class="comment">// from the adjusted input timestamps rather than the original</span>
cannam@0 377 <a name="l00379"></a>00379 <span class="comment">// ones (and inaccuracy where the returned timestamp is implied,</span>
cannam@0 378 <a name="l00380"></a>00380 <span class="comment">// as in one-value-per-block).</span>
cannam@0 379 <a name="l00381"></a>00381 <span class="comment">//</span>
cannam@0 380 <a name="l00382"></a>00382 <span class="comment">// Neither way is ideal, but I don't think either is strictly</span>
cannam@0 381 <a name="l00383"></a>00383 <span class="comment">// incorrect either. I think this is just a case where the same</span>
cannam@0 382 <a name="l00384"></a>00384 <span class="comment">// plugin can legitimately produce differing results from the same</span>
cannam@0 383 <a name="l00385"></a>00385 <span class="comment">// input data, depending on how that data is packaged.</span>
cannam@0 384 <a name="l00386"></a>00386 <span class="comment">// </span>
cannam@0 385 <a name="l00387"></a>00387 <span class="comment">// We'll go for option 2, adjusting the timestamps. Note in</span>
cannam@0 386 <a name="l00388"></a>00388 <span class="comment">// particular that this means some results can differ from those</span>
cannam@0 387 <a name="l00389"></a>00389 <span class="comment">// produced by SV.</span>
cannam@0 388 <a name="l00390"></a>00390
cannam@0 389 <a name="l00391"></a>00391 <span class="comment">// std::cerr &lt;&lt; "PluginInputDomainAdapter: sampleRate " &lt;&lt; m_inputSampleRate &lt;&lt; ", blocksize " &lt;&lt; m_blockSize &lt;&lt; ", adjusting time from " &lt;&lt; timestamp;</span>
cannam@0 390 <a name="l00392"></a>00392
cannam@0 391 <a name="l00393"></a>00393 timestamp = timestamp + <a class="code" href="structVamp_1_1RealTime.html#3a5ecc8888b559aad3b7d96911786b3a" title="Convert a sample frame at the given sample rate into a RealTime.">RealTime::frame2RealTime</a>
cannam@0 392 <a name="l00394"></a>00394 (<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a>/2, <span class="keywordtype">int</span>(<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#bafd656a3bf6d74d6dd38def0c73cc57">m_inputSampleRate</a> + 0.5));
cannam@0 393 <a name="l00395"></a>00395
cannam@0 394 <a name="l00396"></a>00396 <span class="comment">// std::cerr &lt;&lt; " to " &lt;&lt; timestamp &lt;&lt; std::endl;</span>
cannam@0 395 <a name="l00397"></a>00397
cannam@0 396 <a name="l00398"></a>00398 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> c = 0; c &lt; <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#dc38e78c7bf4375516c1d2466bc349e9">m_channels</a>; ++c) {
cannam@0 397 <a name="l00399"></a>00399
cannam@0 398 <a name="l00400"></a>00400 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#efcb8c5e8d65003eaf96d2bfefc83fe5">m_blockSize</a>; ++i) {
cannam@0 399 <a name="l00401"></a>00401 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>[i] = double(inputBuffers[c][i]) * <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a43f6ea4727b9bb29d6d66869886d15e">m_window</a>[i];
cannam@0 400 <a name="l00402"></a>00402 }
cannam@0 401 <a name="l00403"></a>00403
cannam@0 402 <a name="l00404"></a>00404 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m_blockSize/2; ++i) {
cannam@0 403 <a name="l00405"></a>00405 <span class="comment">// FFT shift</span>
cannam@0 404 <a name="l00406"></a>00406 <span class="keywordtype">double</span> value = <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>[i];
cannam@0 405 <a name="l00407"></a>00407 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>[i] = <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>[i + m_blockSize/2];
cannam@0 406 <a name="l00408"></a>00408 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>[i + m_blockSize/2] = value;
cannam@0 407 <a name="l00409"></a>00409 }
cannam@0 408 <a name="l00410"></a>00410
cannam@0 409 <a name="l00411"></a>00411 <span class="preprocessor">#ifdef HAVE_FFTW3</span>
cannam@0 410 <a name="l00412"></a>00412 <span class="preprocessor"></span>
cannam@0 411 <a name="l00413"></a>00413 fftw_execute(m_plan);
cannam@0 412 <a name="l00414"></a>00414
cannam@0 413 <a name="l00415"></a>00415 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt;= m_blockSize/2; ++i) {
cannam@0 414 <a name="l00416"></a>00416 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>[c][i * 2] = float(m_cbuf[i][0]);
cannam@0 415 <a name="l00417"></a>00417 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>[c][i * 2 + 1] = float(m_cbuf[i][1]);
cannam@0 416 <a name="l00418"></a>00418 }
cannam@0 417 <a name="l00419"></a>00419
cannam@0 418 <a name="l00420"></a>00420 <span class="preprocessor">#else</span>
cannam@0 419 <a name="l00421"></a>00421 <span class="preprocessor"></span>
cannam@0 420 <a name="l00422"></a>00422 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#7ea985ca8cdc45dd156e8d50293c3085">fft</a>(m_blockSize, <span class="keyword">false</span>, <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#0c379b5bf280b6db1cf8fe782c1a94bb">m_ri</a>, 0, <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#6407b3c17dc96ba7036f2161b1aa30cb">m_ro</a>, <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4d73b85b9ba00c10b55be4febc56dfc4">m_io</a>);
cannam@0 421 <a name="l00423"></a>00423
cannam@0 422 <a name="l00424"></a>00424 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt;= m_blockSize/2; ++i) {
cannam@0 423 <a name="l00425"></a>00425 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>[c][i * 2] = float(<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#6407b3c17dc96ba7036f2161b1aa30cb">m_ro</a>[i]);
cannam@0 424 <a name="l00426"></a>00426 <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>[c][i * 2 + 1] = float(<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#4d73b85b9ba00c10b55be4febc56dfc4">m_io</a>[i]);
cannam@0 425 <a name="l00427"></a>00427 }
cannam@0 426 <a name="l00428"></a>00428
cannam@0 427 <a name="l00429"></a>00429 <span class="preprocessor">#endif</span>
cannam@0 428 <a name="l00430"></a>00430 <span class="preprocessor"></span> }
cannam@0 429 <a name="l00431"></a>00431
cannam@0 430 <a name="l00432"></a>00432 <span class="keywordflow">return</span> <a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#a85961dc001c031beb0382a883f0738c">m_plugin</a>-&gt;<a class="code" href="classVamp_1_1Plugin.html#e4aed3bebfe80a2e2fccd3d37af26996" title="Process a single block of input data.">process</a>(<a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#24b96bba51fec82383a5413c63f27a57">m_freqbuf</a>, timestamp);
cannam@0 431 <a name="l00433"></a>00433 }
cannam@0 432 <a name="l00434"></a>00434
cannam@0 433 <a name="l00435"></a>00435 <span class="preprocessor">#ifndef HAVE_FFTW3</span>
cannam@0 434 <a name="l00436"></a>00436 <span class="preprocessor"></span>
cannam@0 435 <a name="l00437"></a>00437 <span class="keywordtype">void</span>
cannam@0 436 <a name="l00438"></a><a class="code" href="classVamp_1_1HostExt_1_1PluginInputDomainAdapter_1_1Impl.html#7ea985ca8cdc45dd156e8d50293c3085">00438</a> <a class="code" href="vamp-simple-host_8cpp.html#b40a86a032d0cf473d15fed3616ccc57">PluginInputDomainAdapter::Impl::fft</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> n, <span class="keywordtype">bool</span> inverse,
cannam@0 437 <a name="l00439"></a>00439 <span class="keywordtype">double</span> *ri, <span class="keywordtype">double</span> *ii, <span class="keywordtype">double</span> *ro, <span class="keywordtype">double</span> *io)
cannam@0 438 <a name="l00440"></a>00440 {
cannam@0 439 <a name="l00441"></a>00441 <span class="keywordflow">if</span> (!ri || !ro || !io) <span class="keywordflow">return</span>;
cannam@0 440 <a name="l00442"></a>00442
cannam@0 441 <a name="l00443"></a>00443 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bits;
cannam@0 442 <a name="l00444"></a>00444 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i, j, k, m;
cannam@0 443 <a name="l00445"></a>00445 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> blockSize, blockEnd;
cannam@0 444 <a name="l00446"></a>00446
cannam@0 445 <a name="l00447"></a>00447 <span class="keywordtype">double</span> tr, ti;
cannam@0 446 <a name="l00448"></a>00448
cannam@0 447 <a name="l00449"></a>00449 <span class="keywordflow">if</span> (n &lt; 2) <span class="keywordflow">return</span>;
cannam@0 448 <a name="l00450"></a>00450 <span class="keywordflow">if</span> (n &amp; (n-1)) <span class="keywordflow">return</span>;
cannam@0 449 <a name="l00451"></a>00451
cannam@0 450 <a name="l00452"></a>00452 <span class="keywordtype">double</span> angle = 2.0 * <a class="code" href="PluginInputDomainAdapter_8cpp.html#e71449b1cc6e6250b91f539153a7a0d3">M_PI</a>;
cannam@0 451 <a name="l00453"></a>00453 <span class="keywordflow">if</span> (inverse) angle = -angle;
cannam@0 452 <a name="l00454"></a>00454
cannam@0 453 <a name="l00455"></a>00455 <span class="keywordflow">for</span> (i = 0; ; ++i) {
cannam@0 454 <a name="l00456"></a>00456 <span class="keywordflow">if</span> (n &amp; (1 &lt;&lt; i)) {
cannam@0 455 <a name="l00457"></a>00457 bits = i;
cannam@0 456 <a name="l00458"></a>00458 <span class="keywordflow">break</span>;
cannam@0 457 <a name="l00459"></a>00459 }
cannam@0 458 <a name="l00460"></a>00460 }
cannam@0 459 <a name="l00461"></a>00461
cannam@0 460 <a name="l00462"></a>00462 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> tableSize = 0;
cannam@0 461 <a name="l00463"></a>00463 <span class="keyword">static</span> <span class="keywordtype">int</span> *table = 0;
cannam@0 462 <a name="l00464"></a>00464
cannam@0 463 <a name="l00465"></a>00465 <span class="keywordflow">if</span> (tableSize != n) {
cannam@0 464 <a name="l00466"></a>00466
cannam@0 465 <a name="l00467"></a>00467 <span class="keyword">delete</span>[] table;
cannam@0 466 <a name="l00468"></a>00468
cannam@0 467 <a name="l00469"></a>00469 table = <span class="keyword">new</span> <span class="keywordtype">int</span>[n];
cannam@0 468 <a name="l00470"></a>00470
cannam@0 469 <a name="l00471"></a>00471 <span class="keywordflow">for</span> (i = 0; i &lt; n; ++i) {
cannam@0 470 <a name="l00472"></a>00472
cannam@0 471 <a name="l00473"></a>00473 m = i;
cannam@0 472 <a name="l00474"></a>00474
cannam@0 473 <a name="l00475"></a>00475 <span class="keywordflow">for</span> (j = k = 0; j &lt; bits; ++j) {
cannam@0 474 <a name="l00476"></a>00476 k = (k &lt;&lt; 1) | (m &amp; 1);
cannam@0 475 <a name="l00477"></a>00477 m &gt;&gt;= 1;
cannam@0 476 <a name="l00478"></a>00478 }
cannam@0 477 <a name="l00479"></a>00479
cannam@0 478 <a name="l00480"></a>00480 table[i] = k;
cannam@0 479 <a name="l00481"></a>00481 }
cannam@0 480 <a name="l00482"></a>00482
cannam@0 481 <a name="l00483"></a>00483 tableSize = n;
cannam@0 482 <a name="l00484"></a>00484 }
cannam@0 483 <a name="l00485"></a>00485
cannam@0 484 <a name="l00486"></a>00486 <span class="keywordflow">if</span> (ii) {
cannam@0 485 <a name="l00487"></a>00487 <span class="keywordflow">for</span> (i = 0; i &lt; n; ++i) {
cannam@0 486 <a name="l00488"></a>00488 ro[table[i]] = ri[i];
cannam@0 487 <a name="l00489"></a>00489 io[table[i]] = ii[i];
cannam@0 488 <a name="l00490"></a>00490 }
cannam@0 489 <a name="l00491"></a>00491 } <span class="keywordflow">else</span> {
cannam@0 490 <a name="l00492"></a>00492 <span class="keywordflow">for</span> (i = 0; i &lt; n; ++i) {
cannam@0 491 <a name="l00493"></a>00493 ro[table[i]] = ri[i];
cannam@0 492 <a name="l00494"></a>00494 io[table[i]] = 0.0;
cannam@0 493 <a name="l00495"></a>00495 }
cannam@0 494 <a name="l00496"></a>00496 }
cannam@0 495 <a name="l00497"></a>00497
cannam@0 496 <a name="l00498"></a>00498 blockEnd = 1;
cannam@0 497 <a name="l00499"></a>00499
cannam@0 498 <a name="l00500"></a>00500 <span class="keywordflow">for</span> (blockSize = 2; blockSize &lt;= n; blockSize &lt;&lt;= 1) {
cannam@0 499 <a name="l00501"></a>00501
cannam@0 500 <a name="l00502"></a>00502 <span class="keywordtype">double</span> delta = angle / (double)blockSize;
cannam@0 501 <a name="l00503"></a>00503 <span class="keywordtype">double</span> sm2 = -sin(-2 * delta);
cannam@0 502 <a name="l00504"></a>00504 <span class="keywordtype">double</span> sm1 = -sin(-delta);
cannam@0 503 <a name="l00505"></a>00505 <span class="keywordtype">double</span> cm2 = cos(-2 * delta);
cannam@0 504 <a name="l00506"></a>00506 <span class="keywordtype">double</span> cm1 = cos(-delta);
cannam@0 505 <a name="l00507"></a>00507 <span class="keywordtype">double</span> w = 2 * cm1;
cannam@0 506 <a name="l00508"></a>00508 <span class="keywordtype">double</span> ar[3], ai[3];
cannam@0 507 <a name="l00509"></a>00509
cannam@0 508 <a name="l00510"></a>00510 <span class="keywordflow">for</span> (i = 0; i &lt; n; i += blockSize) {
cannam@0 509 <a name="l00511"></a>00511
cannam@0 510 <a name="l00512"></a>00512 ar[2] = cm2;
cannam@0 511 <a name="l00513"></a>00513 ar[1] = cm1;
cannam@0 512 <a name="l00514"></a>00514
cannam@0 513 <a name="l00515"></a>00515 ai[2] = sm2;
cannam@0 514 <a name="l00516"></a>00516 ai[1] = sm1;
cannam@0 515 <a name="l00517"></a>00517
cannam@0 516 <a name="l00518"></a>00518 <span class="keywordflow">for</span> (j = i, m = 0; m &lt; blockEnd; j++, m++) {
cannam@0 517 <a name="l00519"></a>00519
cannam@0 518 <a name="l00520"></a>00520 ar[0] = w * ar[1] - ar[2];
cannam@0 519 <a name="l00521"></a>00521 ar[2] = ar[1];
cannam@0 520 <a name="l00522"></a>00522 ar[1] = ar[0];
cannam@0 521 <a name="l00523"></a>00523
cannam@0 522 <a name="l00524"></a>00524 ai[0] = w * ai[1] - ai[2];
cannam@0 523 <a name="l00525"></a>00525 ai[2] = ai[1];
cannam@0 524 <a name="l00526"></a>00526 ai[1] = ai[0];
cannam@0 525 <a name="l00527"></a>00527
cannam@0 526 <a name="l00528"></a>00528 k = j + blockEnd;
cannam@0 527 <a name="l00529"></a>00529 tr = ar[0] * ro[k] - ai[0] * io[k];
cannam@0 528 <a name="l00530"></a>00530 ti = ar[0] * io[k] + ai[0] * ro[k];
cannam@0 529 <a name="l00531"></a>00531
cannam@0 530 <a name="l00532"></a>00532 ro[k] = ro[j] - tr;
cannam@0 531 <a name="l00533"></a>00533 io[k] = io[j] - ti;
cannam@0 532 <a name="l00534"></a>00534
cannam@0 533 <a name="l00535"></a>00535 ro[j] += tr;
cannam@0 534 <a name="l00536"></a>00536 io[j] += ti;
cannam@0 535 <a name="l00537"></a>00537 }
cannam@0 536 <a name="l00538"></a>00538 }
cannam@0 537 <a name="l00539"></a>00539
cannam@0 538 <a name="l00540"></a>00540 blockEnd = blockSize;
cannam@0 539 <a name="l00541"></a>00541 }
cannam@0 540 <a name="l00542"></a>00542
cannam@0 541 <a name="l00543"></a>00543 <span class="keywordflow">if</span> (inverse) {
cannam@0 542 <a name="l00544"></a>00544
cannam@0 543 <a name="l00545"></a>00545 <span class="keywordtype">double</span> denom = (double)n;
cannam@0 544 <a name="l00546"></a>00546
cannam@0 545 <a name="l00547"></a>00547 <span class="keywordflow">for</span> (i = 0; i &lt; n; i++) {
cannam@0 546 <a name="l00548"></a>00548 ro[i] /= denom;
cannam@0 547 <a name="l00549"></a>00549 io[i] /= denom;
cannam@0 548 <a name="l00550"></a>00550 }
cannam@0 549 <a name="l00551"></a>00551 }
cannam@0 550 <a name="l00552"></a>00552 }
cannam@0 551 <a name="l00553"></a>00553
cannam@0 552 <a name="l00554"></a>00554 <span class="preprocessor">#endif</span>
cannam@0 553 <a name="l00555"></a>00555 <span class="preprocessor"></span>
cannam@0 554 <a name="l00556"></a>00556 }
cannam@0 555 <a name="l00557"></a>00557
cannam@0 556 <a name="l00558"></a>00558 }
cannam@0 557 <a name="l00559"></a>00559
cannam@0 558 </pre></div></div>
cannam@0 559 <hr size="1"><address style="text-align: right;"><small>Generated on Wed Jul 9 11:36:07 2008 for VampPluginSDK by&nbsp;
cannam@0 560 <a href="http://www.doxygen.org/index.html">
cannam@0 561 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.5 </small></address>
cannam@0 562 </body>
cannam@0 563 </html>