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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 2: C:/Project  Marcel &amp; Oliver/Graphic_Equalizer/include/audio.hch File Reference</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="annotated.html">Data&nbsp;Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="functions.html">Data&nbsp;Fields</a> | <a class="qindex" href="globals.html">Globals</a></div>
<div class="nav">
<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_000003.html">include</a></div>
<h1>audio.hch File Reference</h1>
<p>
This graph shows which files directly or indirectly include this file:<p><center><img src="audio_8hch__dep__incl.png" border="0" usemap="#audio.hchdep_map" alt="Included by dependency graph"></center>
<map name="audio.hchdep_map">
<area href="audio_8hcc.html" shape="rect" coords="7,7,87,34" alt="">
<area href="display_8hcc.html" shape="rect" coords="111,7,199,34" alt="">
<area href="eventhandler_8hcc.html" shape="rect" coords="223,7,346,34" alt="">
<area href="fft_8hcc.html" shape="rect" coords="370,7,429,34" alt="">
<area href="main_8hcc.html" shape="rect" coords="453,7,527,34" alt="">
<area href="smartmedia_8hcc.html" shape="rect" coords="551,7,669,34" alt="">
</map>

<p>
<a href="audio_8hch-source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Data Structures</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="structaudiodata__t.html">audiodata_t</a></td></tr>

<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a0">_AUDIO_HCH</a>&nbsp;&nbsp;&nbsp;1</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a1">AUDIO_NOT_READY</a>&nbsp;&nbsp;&nbsp;0</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a2">AUDIO_READY</a>&nbsp;&nbsp;&nbsp;1</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a3">LINE_IN</a>&nbsp;&nbsp;&nbsp;RC200AudioInLineIn</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a4">MIC_IN</a>&nbsp;&nbsp;&nbsp;RC200AudioInMicrophone</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a5">SR_8000</a>&nbsp;&nbsp;&nbsp;RC200AudioSampleRate8000</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a6">SR_11025</a>&nbsp;&nbsp;&nbsp;RC200AudioSampleRate11025</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a7">SR_16000</a>&nbsp;&nbsp;&nbsp;RC200AudioSampleRate16000</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a8">SR_22050</a>&nbsp;&nbsp;&nbsp;RC200AudioSampleRate22050</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a9">SR_44100</a>&nbsp;&nbsp;&nbsp;RC200AudioSampleRate44100</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a10">SR_48000</a>&nbsp;&nbsp;&nbsp;RC200AudioSampleRate48000</td></tr>

<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">macro proc&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a11">audio_init</a> (gain_level, input_source, sample_rate, AUDIOIN, AUDIOOUT)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set some inital values to the audio hardware.  <a href="#a11"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">macro proc&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="audio_8hch.html#a12">audio_main</a> (audiodata, AUDIOIN, AUDIOOUT)</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Main audiodriver. This function never returns! It calls the audiohandlers and stores samples into a global array. Once 64 Samples are collected it raises a signal AUDIO_READY to let other processes know it's ready. We use quadruple buffering for audio input and double buffering for audio output.  <a href="#a12"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
<h2><a class="anchor" name="generic">
Graphic Equalizer API</a></h2>
<h2><a class="anchor" name="project">
Project information.</a></h2>
Project Graphic Equalizer<br>
 <dl compact><dt><b>Author:</b></dt><dd>O.M. Schinagl </dd></dl>
<dl compact><dt><b>Date:</b></dt><dd>20041021 </dd></dl>
<dl compact><dt><b>Version:</b></dt><dd>0.1</dd></dl>
<h2><a class="anchor" name="copyright">
Copyright</a></h2>
Copyright ©2004 Koninklijke Philips Electronics N.V. All rights reserved<h2><a class="anchor" name="history">
Change history</a></h2>
20041021: O.M. Schinagl<br>
 Initial version
<p>
Definition in file <a class="el" href="audio_8hch-source.html">audio.hch</a>.<hr><h2>Define Documentation</h2>
<a class="anchor" name="a0" doxytag="audio.hch::_AUDIO_HCH"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define _AUDIO_HCH&nbsp;&nbsp;&nbsp;1          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00020">20</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a1" doxytag="audio.hch::AUDIO_NOT_READY"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define AUDIO_NOT_READY&nbsp;&nbsp;&nbsp;0          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00044">44</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a2" doxytag="audio.hch::AUDIO_READY"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define AUDIO_READY&nbsp;&nbsp;&nbsp;1          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00045">45</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a3" doxytag="audio.hch::LINE_IN"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define LINE_IN&nbsp;&nbsp;&nbsp;RC200AudioInLineIn          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00052">52</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.
<p>
Referenced by <a class="el" href="main_8hcc-source.html#l00051">main()</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a4" doxytag="audio.hch::MIC_IN"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define MIC_IN&nbsp;&nbsp;&nbsp;RC200AudioInMicrophone          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00053">53</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a5" doxytag="audio.hch::SR_8000"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define SR_8000&nbsp;&nbsp;&nbsp;RC200AudioSampleRate8000          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00060">60</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a6" doxytag="audio.hch::SR_11025"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define SR_11025&nbsp;&nbsp;&nbsp;RC200AudioSampleRate11025          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00061">61</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a7" doxytag="audio.hch::SR_16000"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define SR_16000&nbsp;&nbsp;&nbsp;RC200AudioSampleRate16000          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00062">62</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a8" doxytag="audio.hch::SR_22050"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define SR_22050&nbsp;&nbsp;&nbsp;RC200AudioSampleRate22050          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00063">63</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a9" doxytag="audio.hch::SR_44100"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define SR_44100&nbsp;&nbsp;&nbsp;RC200AudioSampleRate44100          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00064">64</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.
<p>
Referenced by <a class="el" href="main_8hcc-source.html#l00051">main()</a>.    </td>
  </tr>
</table>
<a class="anchor" name="a10" doxytag="audio.hch::SR_48000"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">#define SR_48000&nbsp;&nbsp;&nbsp;RC200AudioSampleRate48000          </td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>

<p>
Definition at line <a class="el" href="audio_8hch-source.html#l00065">65</a> of file <a class="el" href="audio_8hch-source.html">audio.hch</a>.    </td>
  </tr>
</table>
<hr><h2>Function Documentation</h2>
<a class="anchor" name="a11" doxytag="audio.hch::audio_init"></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
  <tr>
    <td class="mdRow">
      <table cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td class="md" nowrap valign="top">macro proc audio_init           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">gain_level&nbsp;</td>
          <td class="mdname" nowrap>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>input_source&nbsp;</td>
          <td class="mdname" nowrap>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>sample_rate&nbsp;</td>
          <td class="mdname" nowrap>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>AUDIOIN&nbsp;</td>
          <td class="mdname" nowrap>, </td>
        </tr>
        <tr>
          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>AUDIOOUT&nbsp;</td>
          <td class="mdname" nowrap></td>
        </tr>
        <tr>
          <td class="md"></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
        </tr>
      </table>
    </td>
  </tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
  <tr>
    <td>
      &nbsp;
    </td>
    <td>

<p>
Set some inital values to the audio hardware. 
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>gain_level</em>&nbsp;</td><td>Set the input amplifier to this amplification level. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>input_source</em>&nbsp;</td><td>Choose between microphone input or linein input. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>sample_rate</em>&nbsp;</td><td>Set the sample rate between 8000 and 48000</td></tr>
  </table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>void </dd></dl>
<dl compact><dt><b>Return values:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>void</em>&nbsp;</td><td></td></tr>
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</dl>

<p>
Definition at line <a class="el" href="audio_8hcc-source.html#l00045">45</a> of file <a class="el" href="audio_8hcc-source.html">audio.hcc</a>.
<p>
Referenced by <a class="el" href="main_8hcc-source.html#l00051">main()</a>.    </td>
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<a class="anchor" name="a12" doxytag="audio.hch::audio_main"></a><p>
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          <td class="md" nowrap valign="top">macro proc audio_main           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">audiodata&nbsp;</td>
          <td class="mdname" nowrap>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>AUDIOIN&nbsp;</td>
          <td class="mdname" nowrap>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>AUDIOOUT&nbsp;</td>
          <td class="mdname" nowrap></td>
        </tr>
        <tr>
          <td class="md"></td>
          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"></td>
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    </td>
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      &nbsp;
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<p>
Main audiodriver. This function never returns! It calls the audiohandlers and stores samples into a global array. Once 64 Samples are collected it raises a signal AUDIO_READY to let other processes know it's ready. We use quadruple buffering for audio input and double buffering for audio output. 
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>*audiodata</em>&nbsp;</td><td>pointer to audio information structure. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>AUDIOIN</em>&nbsp;</td><td>Audio Input Handler </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>AUDIOOUT</em>&nbsp;</td><td>Audio Output Handler</td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>Never Returns. </dd></dl>
<dl compact><dt><b>Return values:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>void</em>&nbsp;</td><td></td></tr>
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</dl>

<p>
Definition at line <a class="el" href="audio_8hcc-source.html#l00076">76</a> of file <a class="el" href="audio_8hcc-source.html">audio.hcc</a>.
<p>
Referenced by <a class="el" href="main_8hcc-source.html#l00051">main()</a>.    </td>
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<hr size="1"><address style="align: right;"><small>Generated on Thu Dec 9 14:37:07 2004 for Graphic Equalizer 2 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>
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