ogg2/doc/ogg/ogg_stream_packetpeek.html

   1 <html>
   2
   3 <head>
   4 <title>libogg - function - ogg_stream_packetpeek</title>
   5 <link rel=stylesheet href="style.css" type="text/css">
   6 </head>
   7
   8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
   9 <table border=0 width=100%>
  10 <tr>
  11 <td><p class=tiny>libogg documentation</p></td>
  12 <td align=right><p class=tiny>libogg version 1.26 - 20010527</p></td>
  13 </tr>
  14 </table>
  15
  16 <h1>ogg_stream_packetout</h1>
  17
  18 <p><i>declared in "ogg/ogg.h";</i></p>
  19
  20 <p>This function attempts to assemble a raw data packet and returns
  21 it without advancing decoding.</p>
  22
  23 <p>In a typical situation, this would be called
  24 speculatively after <a
  25 href="ogg_stream_pagein.html">ogg_stream_pagein()</a> to check
  26 the packet contents before handing it off to a codec for
  27 decompression. To advance page decoding and remove
  28 the packet from the sync structure, call
  29 <a href="ogg_stream_packetout.html">ogg_stream_packetout()</a>.</p>
  30
  31 <br><br>
  32
  33 <table border=0 color=black cellspacing=0 cellpadding=7>
  34 <tr bgcolor=#cccccc>
  35         <td>
  36 <pre><b>
  37 int ogg_stream_packetpeek(ogg_stream_state *os,ogg_packet *op);
  38 </b></pre>
  39         </td>
  40 </tr>
  41 </table>
  42
  43 <h3>Parameters</h3>
  44 <dl>
  45 <dt><i>os</i></dt>
  46 <dd>Pointer to a previously declared
  47 <a href="ogg_stream_state.html">ogg_stream_state</a> struct.  Before this
  48 function is called, an <a href="ogg_page.html">ogg_page</a> should be
  49 submitted to the stream using
  50 <a href="ogg_stream_pagein.html">ogg_stream_pagein()</a>.</dd>
  51 <dt><i>op</i></dt>
  52 <dd>Pointer to the next packet available in the bitstream, if
  53 any. A NULL value may be passed in the case of a simple "is there a
  54 packet?" check.</dd>
  55 </dl>
  56
  57
  58 <h3>Return Values</h3>
  59 <blockquote>
  60 <ul>
  61 <li>-1 if there's no packet available due to lost sync or a hole
  62 in the data.</li>
  63 <li>1 if a packet is available.</li>
  64 </ul>
  65 </blockquote>
  66
  67
  68 <br><br>
  69
  70 <hr noshade>
  71
  72 <table border=0 width=100%>
  73 <tr valign=top>
  74 <td><p class=tiny>copyright &copy; 2001 xiph.org</p></td>
  75 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a><br><a href="mailto:team@xiph.org">team@xiph.org</a></p></td>
  76 </tr><tr>
  77 <td><p class=tiny>libogg documentation</p></td>
  78 <td align=right><p class=tiny>libogg version 1.26 - 20010527</p></td>
  79 </tr>
  80 </table>
  81
  82
  83 </body>
  84
  85 </html>