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Did more commenting. Added documentation.
author Adam Stark <adamstark@users.noreply.github.com>
date Sat, 25 Jan 2014 18:17:51 +0000
parents
children deb49a2590f3
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+<title>BTrack - A Real-Time Beat Tracker: BTrack Class Reference</title>
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+  <td style="padding-left: 0.5em;">
+   <div id="projectname">BTrack - A Real-Time Beat Tracker
+   </div>
+  </td>
+ </tr>
+ </tbody>
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+<!-- end header part -->
+<!-- Generated by Doxygen 1.8.2 -->
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+      <li><a href="index.html"><span>Main&#160;Page</span></a></li>
+      <li class="current"><a href="annotated.html"><span>Classes</span></a></li>
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+      <li><a href="annotated.html"><span>Class&#160;List</span></a></li>
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+
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+        name="MSearchResults" id="MSearchResults">
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+</div><!-- top -->
+<div class="header">
+  <div class="summary">
+<a href="#pub-methods">Public Member Functions</a> &#124;
+<a href="#pub-static-methods">Static Public Member Functions</a> &#124;
+<a href="class_b_track-members.html">List of all members</a>  </div>
+  <div class="headertitle">
+<div class="title">BTrack Class Reference</div>  </div>
+</div><!--header-->
+<div class="contents">
+
+<p><code>#include &lt;<a class="el" href="_b_track_8h_source.html">BTrack.h</a>&gt;</code></p>
+<table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
+Public Member Functions</h2></td></tr>
+<tr class="memitem:a243ac408666ce0301fecd9b0a2a6f307"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a243ac408666ce0301fecd9b0a2a6f307">BTrack</a> ()</td></tr>
+<tr class="separator:a243ac408666ce0301fecd9b0a2a6f307"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ac4dbda7c90ce1a3080def2d5da875171"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#ac4dbda7c90ce1a3080def2d5da875171">BTrack</a> (int hopSize_)</td></tr>
+<tr class="separator:ac4dbda7c90ce1a3080def2d5da875171"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:afce9e207a2f6ff71d96125dee16797de"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#afce9e207a2f6ff71d96125dee16797de">BTrack</a> (int hopSize_, int frameSize_)</td></tr>
+<tr class="separator:afce9e207a2f6ff71d96125dee16797de"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:abb7ce7253095e6f859ef7b30f06ce051"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#abb7ce7253095e6f859ef7b30f06ce051">processAudioFrame</a> (double *frame)</td></tr>
+<tr class="separator:abb7ce7253095e6f859ef7b30f06ce051"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a6fab18732bef8c87152e93dec9e4f854"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a6fab18732bef8c87152e93dec9e4f854">processOnsetDetectionFunctionSample</a> (double sample)</td></tr>
+<tr class="separator:a6fab18732bef8c87152e93dec9e4f854"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ac06aa079977062bfa2930cdca45e69fb"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#ac06aa079977062bfa2930cdca45e69fb">getHopSize</a> ()</td></tr>
+<tr class="separator:ac06aa079977062bfa2930cdca45e69fb"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:ac92eaea0e42dd18c79de10bf852d7f4a"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#ac92eaea0e42dd18c79de10bf852d7f4a">beatDueInCurrentFrame</a> ()</td></tr>
+<tr class="separator:ac92eaea0e42dd18c79de10bf852d7f4a"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a17cea0a4dff3908660e4117e9a6c42bb"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a17cea0a4dff3908660e4117e9a6c42bb">getCurrentTempoEstimate</a> ()</td></tr>
+<tr class="separator:a17cea0a4dff3908660e4117e9a6c42bb"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a7ccb5059d0f00e3217ea686e4c1e156d"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a7ccb5059d0f00e3217ea686e4c1e156d">getLatestCumulativeScoreValue</a> ()</td></tr>
+<tr class="separator:a7ccb5059d0f00e3217ea686e4c1e156d"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a96cf4088e40dff66ce15ada1f671a186"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a96cf4088e40dff66ce15ada1f671a186">setTempo</a> (double tempo)</td></tr>
+<tr class="separator:a96cf4088e40dff66ce15ada1f671a186"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a550829be9b4c58cd53195ec4900c7c71"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a550829be9b4c58cd53195ec4900c7c71">fixTempo</a> (double tempo)</td></tr>
+<tr class="separator:a550829be9b4c58cd53195ec4900c7c71"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a22917ea231d2efd5670a764dd5a98983"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a22917ea231d2efd5670a764dd5a98983">doNotFixTempo</a> ()</td></tr>
+<tr class="separator:a22917ea231d2efd5670a764dd5a98983"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table><table class="memberdecls">
+<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
+Static Public Member Functions</h2></td></tr>
+<tr class="memitem:aa66d0b9dfb4408e8cf84398f03b60a56"><td class="memItemLeft" align="right" valign="top">static double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#aa66d0b9dfb4408e8cf84398f03b60a56">getBeatTimeInSeconds</a> (long frameNumber, int hopSize, int fs)</td></tr>
+<tr class="separator:aa66d0b9dfb4408e8cf84398f03b60a56"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a1ebb4312fed8cf1de5353fef68c0fe74"><td class="memItemLeft" align="right" valign="top">static double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_b_track.html#a1ebb4312fed8cf1de5353fef68c0fe74">getBeatTimeInSeconds</a> (int frameNumber, int hopSize, int fs)</td></tr>
+<tr class="separator:a1ebb4312fed8cf1de5353fef68c0fe74"><td class="memSeparator" colspan="2">&#160;</td></tr>
+</table>
+<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
+<div class="textblock"><p>The main beat tracking class and the interface to the <a class="el" href="class_b_track.html">BTrack</a> beat tracking algorithm. The algorithm can process either audio frames or onset detection function samples and also contains some static functions for calculating beat times in seconds </p>
+</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
+<a class="anchor" id="a243ac408666ce0301fecd9b0a2a6f307"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">BTrack::BTrack </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>constructor assuming hop size of 512 and frame size of 1024 </p>
+
+</div>
+</div>
+<a class="anchor" id="ac4dbda7c90ce1a3080def2d5da875171"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">BTrack::BTrack </td>
+          <td>(</td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>hopSize_</em></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>constructor assuming frame size will be double the hopSize </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">hopSize</td><td>the hop size in audio samples </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="afce9e207a2f6ff71d96125dee16797de"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">BTrack::BTrack </td>
+          <td>(</td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>hopSize_</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>frameSize_</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>constructor taking both hopSize and frameSize </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">hopSize</td><td>the hop size in audio samples </td></tr>
+    <tr><td class="paramname">frameSize</td><td>the frame size in audio samples </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<h2 class="groupheader">Member Function Documentation</h2>
+<a class="anchor" id="ac92eaea0e42dd18c79de10bf852d7f4a"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">bool BTrack::beatDueInCurrentFrame </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<dl class="section return"><dt>Returns</dt><dd>true if a beat should occur in the current audio frame </dd></dl>
+
+</div>
+</div>
+<a class="anchor" id="a22917ea231d2efd5670a764dd5a98983"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">void BTrack::doNotFixTempo </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>tell the algorithm to not fix the tempo anymore </p>
+
+</div>
+</div>
+<a class="anchor" id="a550829be9b4c58cd53195ec4900c7c71"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">void BTrack::fixTempo </td>
+          <td>(</td>
+          <td class="paramtype">double&#160;</td>
+          <td class="paramname"><em>tempo</em></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>fix tempo to roughly around some value, so that the algorithm will only try to track tempi around the given tempo </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">tempo</td><td>the tempo in beats per minute (bpm) </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="aa66d0b9dfb4408e8cf84398f03b60a56"></a>
+<div class="memitem">
+<div class="memproto">
+<table class="mlabels">
+  <tr>
+  <td class="mlabels-left">
+      <table class="memname">
+        <tr>
+          <td class="memname">double BTrack::getBeatTimeInSeconds </td>
+          <td>(</td>
+          <td class="paramtype">long&#160;</td>
+          <td class="paramname"><em>frameNumber</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>hopSize</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>fs</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+  </td>
+  <td class="mlabels-right">
+<span class="mlabels"><span class="mlabel">static</span></span>  </td>
+  </tr>
+</table>
+</div><div class="memdoc">
+<p>calculates a beat time in seconds, given the frame number, hop size and sampling frequency. This version uses a long to represent the frame number </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">frameNumber</td><td>the index of the current frame </td></tr>
+    <tr><td class="paramname">hopSize</td><td>the hop size in audio samples </td></tr>
+    <tr><td class="paramname">fs</td><td>the sampling frequency in Hz </td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>a beat time in seconds </dd></dl>
+
+</div>
+</div>
+<a class="anchor" id="a1ebb4312fed8cf1de5353fef68c0fe74"></a>
+<div class="memitem">
+<div class="memproto">
+<table class="mlabels">
+  <tr>
+  <td class="mlabels-left">
+      <table class="memname">
+        <tr>
+          <td class="memname">double BTrack::getBeatTimeInSeconds </td>
+          <td>(</td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>frameNumber</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>hopSize</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">int&#160;</td>
+          <td class="paramname"><em>fs</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+  </td>
+  <td class="mlabels-right">
+<span class="mlabels"><span class="mlabel">static</span></span>  </td>
+  </tr>
+</table>
+</div><div class="memdoc">
+<p>calculates a beat time in seconds, given the frame number, hop size and sampling frequency. This version uses an int to represent the frame number </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">frameNumber</td><td>the index of the current frame </td></tr>
+    <tr><td class="paramname">hopSize</td><td>the hop size in audio samples </td></tr>
+    <tr><td class="paramname">fs</td><td>the sampling frequency in Hz </td></tr>
+  </table>
+  </dd>
+</dl>
+<dl class="section return"><dt>Returns</dt><dd>a beat time in seconds </dd></dl>
+
+</div>
+</div>
+<a class="anchor" id="a17cea0a4dff3908660e4117e9a6c42bb"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">double BTrack::getCurrentTempoEstimate </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<dl class="section return"><dt>Returns</dt><dd>the current tempo estimate being used by the beat tracker </dd></dl>
+
+</div>
+</div>
+<a class="anchor" id="ac06aa079977062bfa2930cdca45e69fb"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">int BTrack::getHopSize </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<dl class="section return"><dt>Returns</dt><dd>the current hop size being used by the beat tracker </dd></dl>
+
+</div>
+</div>
+<a class="anchor" id="a7ccb5059d0f00e3217ea686e4c1e156d"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">double BTrack::getLatestCumulativeScoreValue </td>
+          <td>(</td>
+          <td class="paramname"></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<dl class="section return"><dt>Returns</dt><dd>the most recent value of the cumulative score function </dd></dl>
+
+</div>
+</div>
+<a class="anchor" id="abb7ce7253095e6f859ef7b30f06ce051"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">void BTrack::processAudioFrame </td>
+          <td>(</td>
+          <td class="paramtype">double *&#160;</td>
+          <td class="paramname"><em>frame</em></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Process a single audio frame </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">frame</td><td>a pointer to an array containing an audio frame. The number of samples should match the frame size that the algorithm was initialised with. </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="a6fab18732bef8c87152e93dec9e4f854"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">void BTrack::processOnsetDetectionFunctionSample </td>
+          <td>(</td>
+          <td class="paramtype">double&#160;</td>
+          <td class="paramname"><em>sample</em></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Add new onset detection function sample to buffer and apply beat tracking </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">sample</td><td>an onset detection function sample </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<a class="anchor" id="a96cf4088e40dff66ce15ada1f671a186"></a>
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">void BTrack::setTempo </td>
+          <td>(</td>
+          <td class="paramtype">double&#160;</td>
+          <td class="paramname"><em>tempo</em></td><td>)</td>
+          <td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+<p>Set the tempo of the beat tracker </p>
+<dl class="params"><dt>Parameters</dt><dd>
+  <table class="params">
+    <tr><td class="paramname">tempo</td><td>the tempo in beats per minute (bpm) </td></tr>
+  </table>
+  </dd>
+</dl>
+
+</div>
+</div>
+<hr/>The documentation for this class was generated from the following files:<ul>
+<li>src/<a class="el" href="_b_track_8h_source.html">BTrack.h</a></li>
+<li>src/<a class="el" href="_b_track_8cpp.html">BTrack.cpp</a></li>
+</ul>
+</div><!-- contents -->
+<!-- start footer part -->
+<hr class="footer"/><address class="footer"><small>
+Generated on Sat Jan 25 2014 18:11:17 for BTrack - A Real-Time Beat Tracker by &#160;<a href="http://www.doxygen.org/index.html">
+<img class="footer" src="doxygen.png" alt="doxygen"/>
+</a> 1.8.2
+</small></address>
+</body>
+</html>