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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
+<title>Graphic Equalizer: C:/Project Marcel &amp; Oliver/Graphic_Equalizer/src/sample.hcc Source File</title>
+<link href="doxygen.css" rel="stylesheet" type="text/css">
+</head><body>
+<!-- Generated by Doxygen 1.3.9.1 -->
+<div class="qindex"><a class="qindex" href="main.html">Main&nbsp;Page</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="globals.html">Globals</a></div>
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+<a class="el" href="dir_000000.html">C:</a>&nbsp;/&nbsp;<a class="el" href="dir_000001.html">Project Marcel &amp; Oliver</a>&nbsp;/&nbsp;<a class="el" href="dir_000002.html">Graphic_Equalizer</a>&nbsp;/&nbsp;<a class="el" href="dir_000004.html">src</a></div>
+<h1>sample.hcc</h1><a href="sample_8hcc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001
+00019 <span class="comment">/******** System Includes *************/</span>
+00020
+00021 <span class="comment">/******** Application Includes ********/</span>
+00022 <span class="preprocessor">#include "<a class="code" href="sample_8hch.html">sample.hch</a>"</span>
+00023
+00024
+00025
+00026 <span class="comment">/*</span>
+00027 <span class="comment"> * Pointer that points towards the current 64 bits samples.</span>
+00028 <span class="comment"> */</span>
+00029 <span class="keywordtype">signed</span> 16 *audio_in_ptr;
+00030
+00031 <span class="comment">/*</span>
+00032 <span class="comment"> * 64 step counter to keep track of our samples. This is a private variable.</span>
+00033 <span class="comment"> */</span>
+00034 <span class="keywordtype">unsigned</span> 8 sample_count;
+00035
+00036
+00037
+<a name="l00046"></a><a class="code" href="sample_8hcc.html#a2">00046</a> <span class="keywordtype">void</span> <a class="code" href="sample_8hcc.html#a2">sample_add</a>(<span class="keywordtype">signed</span> 16 in_sample) {
+00047 <span class="comment">/*</span>
+00048 <span class="comment"> * We only sample 64 bits in our buffer, hence we circulate around the</span>
+00049 <span class="comment"> * last 6 bits.</span>
+00050 <span class="comment"> */</span>
+00051 audio_in_ptr[sample_count &lt;-6] = in_sample;
+00052 sample_count++;
+00053 } <span class="comment">/* --- sample_add() --- */</span>
+00054
+00055
+00056
+<a name="l00065"></a><a class="code" href="sample_8hcc.html#a3">00065</a> <span class="keywordtype">void</span> <a class="code" href="sample_8hcc.html#a3">sample_get</a>(<span class="keywordtype">signed</span> 16 *out_sample) {
+00066 <span class="comment">/*</span>
+00067 <span class="comment"> * We circulate around a 64 bits buffer, therefor we only use the last</span>
+00068 <span class="comment"> * 6 bits.</span>
+00069 <span class="comment"> */</span>
+00070 *out_sample = audio_out_ptr[sample_count &lt;-6];
+00071 } <span class="comment">/* --- sample_get() --- */</span>
+00072
+00073
+00074
+<a name="l00084"></a><a class="code" href="sample_8hcc.html#a4">00084</a> <span class="keywordtype">unsigned</span> 1 <a class="code" href="sample_8hch.html#a2">sample_rotate_buffers</a>(<span class="keywordtype">void</span>) {
+00085 <span class="keywordtype">unsigned</span> 1 retval; <span class="comment">/* store for returnvalue */</span>
+00086
+00087 retval = 0;
+00088 <span class="comment">/*</span>
+00089 <span class="comment"> * We only want to read 64 samples, but calculations work nicer if we</span>
+00090 <span class="comment"> * use 256 samples. Therefor we circulate our audio pointer around.</span>
+00091 <span class="comment"> */</span>
+00092 <span class="keywordflow">if</span> (!(sample_count &lt;- 6)) {
+00093 <span class="comment">/*</span>
+00094 <span class="comment"> * 64 Samples have passed. We are back at '0'. Use the full</span>
+00095 <span class="comment"> * sample count as index which is 0 64 128 or 192 and back to</span>
+00096 <span class="comment"> * 0. Our Output is only 128 big so we only look at the</span>
+00097 <span class="comment"> * 7 LSB. Also, notify the main application that 64 samples</span>
+00098 <span class="comment"> * have been processed.</span>
+00099 <span class="comment"> */</span>
+00100 par {
+00101 audio_in_ptr = &amp;pcm_audio_in[sample_count];
+00102 audio_out_ptr = &amp;pcm_audio_out[(sample_count &lt;- 7)];
+00103 retval = 1;
+00104 }
+00105 }
+00106 } <span class="comment">/* --- sample_rotate_buffers() --- */</span>
+</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Nov 29 10:53:29 2004 for Graphic Equalizer by&nbsp;
+<a href="http://www.doxygen.org/index.html">
+<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.3.9.1 </small></address>
+</body>
+</html>