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1 <html>
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3 <head>
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4 <title>libvorbis - function - vorbis_synthesis_halfrate</title>
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5 <link rel=stylesheet href="style.css" type="text/css">
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6 </head>
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7
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8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
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9 <table border=0 width=100%>
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10 <tr>
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11 <td><p class=tiny>libvorbis documentation</p></td>
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12 <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td>
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13 </tr>
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14 </table>
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15
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16 <h1>vorbis_synthesis_halfrate</h1>
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17
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18 <p><i>declared in "vorbis/codec.h";</i></p>
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19
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20 <p>This function puts the Vorbis decoder into or out of half-rate
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21 mode. In half-rate mode, the audio is decoded to only half its original
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22 sampling rate. Half-rate mode speeds up decoding at the expense of
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23 decoded audio quality.</p>
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24
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25 <table border=0 color=black cellspacing=0 cellpadding=7>
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26 <tr bgcolor=#cccccc>
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27 <td>
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28 <pre><b>
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29 extern int vorbis_synthesis_halfrate(vorbis_info *v,int flag);
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30 </b></pre>
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31 </td>
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32 </tr>
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33 </table>
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34
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35 <h3>Parameters</h3>
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36 <dl>
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37 <dt><i>v</i></dt>
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38 <dd>The <a href="vorbis_info.html">vorbis_info</a> structure for the
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39 decoder instance.</dd>
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40 <dt><i>flag</i></dt>
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41 <dd>Whether half-rate mode is to be turned on or off. Zero turns it off;
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42 nonzero turns it on.</dd>
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43 </dl>
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44
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45
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46 <h3>Return Values</h3>
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47 <blockquote>
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48 <li>0 on success.</li>
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49 <li>-1 if half-rate mode could not be set.</li>
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50 </blockquote>
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51 <p>
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52
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53 <br><br>
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54 <hr noshade>
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55 <table border=0 width=100%>
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56 <tr valign=top>
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57 <td><p class=tiny>copyright © 2010 Xiph.Org</p></td>
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58 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a></p></td>
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59 </tr><tr>
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60 <td><p class=tiny>libvorbis documentation</p></td>
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61 <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td>
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62 </tr>
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63 </table>
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64
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65
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66 </body>
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67
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68 </html>
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