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1 <html>
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2
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3 <head>
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4 <title>libvorbis - function - vorbis_comment_query</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_comment_query</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 retrieves a comment string for a given tag in a
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21 <a href="vorbis_comment.html">vorbis_comment</a> structure.</p>
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22
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23 <table border=0 color=black cellspacing=0 cellpadding=7>
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24 <tr bgcolor=#cccccc>
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25 <td>
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26 <pre><b>
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27 extern char *vorbis_comment_query(vorbis_comment *vc, const char *tag, int count);
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28 </b></pre>
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29 </td>
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30 </tr>
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31 </table>
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32
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33 <h3>Parameters</h3>
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34 <dl>
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35 <dt><i>vc</i></dt>
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36 <dd>Pointer to the vorbis_comment structure.</dd>
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37 <dt><i>tag</i></dt>
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38 <dd>Pointer to a null-terminated string of the comment tag to look
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39 for. Tags are compared case-insensitively.</dd>
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40 <dt><i>count</i></dt>
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41 <dd>The index of the comment string to retrieve. A value of 0 indicates
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42 the first comment whose tag matches <i>tag</i>. Use
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43 <a href="vorbis_comment_query_count.html">vorbis_comment_query_count</a>
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44 to determine the number of matching comments.</dd>
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45 </dl>
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46
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47
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48 <h3>Return Values</h3>
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49 <blockquote>
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50 <li>A pointer to the comment string. The underlying buffer is owned by
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51 the vorbis_comment structure.</li>
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52 <li>NULL on a nonexistent tag or if <i>count</i> is greater than or
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53 equal to the number of matching comments.</li>
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54 </blockquote>
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55 <p>
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56
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57 <br><br>
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58 <hr noshade>
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59 <table border=0 width=100%>
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60 <tr valign=top>
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61 <td><p class=tiny>copyright © 2010 Xiph.Org</p></td>
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62 <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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63 </tr><tr>
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64 <td><p class=tiny>libvorbis documentation</p></td>
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65 <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td>
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66 </tr>
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67 </table>
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68
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69
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70 </body>
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71
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72 </html>
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