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  • Committer: Bazaar Package Importer
  • Author(s): Jamie Wilkinson
  • Date: 2005-04-16 01:19:44 UTC
  • mfrom: (1.2.1 upstream) (2.1.1 hoary)
  • Revision ID: james.westby@ubuntu.com-20050416011944-5ipwrrc260ihkpp8
Tags: 0.9.1-1
New upstream release.

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doc/liboggz/html/group__hungry.html
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<title>liboggz: Writing with OggzHungry callbacks</title>
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<link href="doxygen.css" rel="stylesheet" type="text/css">
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</head><body>
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<!-- Generated by Doxygen 1.3.5 -->
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<div class="qindex"><a class="qindex" href="index.html">Main&nbsp;Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="globals.html">Globals</a></div>
 
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<!-- Generated by Doxygen 1.4.0 -->
 
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<div class="qindex"><a class="qindex" href="index.html">Main&nbsp;Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File&nbsp;List</a> | <a class="qindex" href="globals.html">Globals</a></div>
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<h1>Writing with OggzHungry callbacks</h1>An OggzHungry callback will:<ul>
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<li>Create an <em>ogg_packet</em> structure</li><li>Add it to the packet queue with <a class="el" href="group__write__api.html#ga2">oggz_write_feed()</a></li></ul>
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<p>
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<div align="center">
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<img src="hungry.png" alt="hungry.png">
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</div>
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<p>
 
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 <p>
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The following example code generates a stream of ten packets, each containing a single byte ('A', 'B', ... , 'J'):<p>
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<div class="fragment"><pre>
 
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<div class="fragment"><pre class="fragment">
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<span class="preprocessor">#include &lt;stdlib.h&gt;</span> <span class="comment">/* exit */</span>
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<span class="preprocessor">#include &lt;<a class="code" href="oggz_8h.html">oggz/oggz.h</a>&gt;</span>
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<span class="keyword">static</span> ogg_int64_t packetno = 0;
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<span class="keyword">static</span> <span class="keywordtype">int</span>
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hungry (<a class="code" href="oggz_8h.html#a0">OGGZ</a> * oggz, <span class="keywordtype">int</span> empty, <span class="keywordtype">void</span> * user_data)
 
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hungry (OGGZ * oggz, <span class="keywordtype">int</span> empty, <span class="keywordtype">void</span> * user_data)
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{
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  ogg_packet op;
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  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[1];
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  buf[0] = <span class="charliteral">'A'</span> + (<span class="keywordtype">int</span>)packetno;
 
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  buf[0] = <span class="charliteral">'A'</span> + (int)packetno;
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  op.packet = buf;
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  op.bytes = 1;
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  op.packetno = packetno;
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  <span class="keywordflow">if</span> (packetno == 0) op.b_o_s = 1;
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  <span class="keywordflow">else</span> op.b_o_s = 0;
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  <span class="keywordflow">if</span> (packetno == 9) op.e_o_s = 1;
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  <span class="keywordflow">else</span> op.e_o_s = 0;
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  <a class="code" href="group__write__api.html#ga2">oggz_write_feed</a> (oggz, &amp;op, serialno, OGGZ_FLUSH_AFTER, NULL);
 
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  else op.b_o_s = 0;
 
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  if (packetno == 9) op.e_o_s = 1;
 
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  else op.e_o_s = 0;
 
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  oggz_write_feed (oggz, &amp;op, serialno, OGGZ_FLUSH_AFTER, NULL);
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  granulepos += 100;
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  packetno++;
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  <span class="keywordflow">return</span> 0;
 
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  return 0;
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}
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<span class="keywordtype">int</span>
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  progname = argv[0];
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  <span class="keywordflow">if</span> (argc &gt; 1) filename = argv[1];
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  <span class="keywordflow">if</span> (filename) {
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    oggz = <a class="code" href="oggz_8h.html#a5">oggz_open</a> (filename, OGGZ_WRITE);
 
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  if (filename) {
 
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    oggz = <a class="code" href="oggz_8h.html#a2">oggz_open</a> (filename, OGGZ_WRITE);
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  } <span class="keywordflow">else</span> {
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    oggz = <a class="code" href="oggz_8h.html#a6">oggz_open_stdio</a> (stdout, OGGZ_WRITE);
 
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    oggz = <a class="code" href="oggz_8h.html#a3">oggz_open_stdio</a> (stdout, OGGZ_WRITE);
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  }
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  <span class="keywordflow">if</span> (oggz == NULL) {
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    exit (1);
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  }
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  serialno = <a class="code" href="oggz_8h.html#a27">oggz_serialno_new</a> (oggz);
 
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  serialno = <a class="code" href="oggz_8h.html#a8">oggz_serialno_new</a> (oggz);
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  <span class="keywordflow">if</span> (<a class="code" href="group__write__api.html#ga1">oggz_write_set_hungry_callback</a> (oggz, hungry, 1, NULL) == -1) {
 
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  <span class="keywordflow">if</span> (oggz_write_set_hungry_callback (oggz, hungry, 1, NULL) == -1) {
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    fprintf (stderr, <span class="stringliteral">"%s: Error setting OggzHungry callback\n"</span>, progname);
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    exit (1);
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  }
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  <span class="keywordflow">while</span> ((n = <a class="code" href="group__write__api.html#ga4">oggz_write</a> (oggz, 32)) &gt; 0);
 
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  <span class="keywordflow">while</span> ((n = oggz_write (oggz, 32)) &gt; 0);
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  <a class="code" href="oggz_8h.html#a8">oggz_close</a> (oggz);
 
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  <a class="code" href="oggz_8h.html#a5">oggz_close</a> (oggz);
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  exit (0);
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}
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</pre></div> 
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<p>
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<table border=0 cellpadding=0 cellspacing=0>
 
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<table border="0" cellpadding="0" cellspacing="0">
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<tr><td></td></tr>
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</table>
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<hr size="1"><address style="align: right;"><small>Generated on Thu Mar 11 13:02:14 2004 for liboggz by
 
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<hr size="1"><address style="align: right;"><small>Generated on Fri Apr 8 23:36:18 2005 for liboggz by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img src="doxygen.png" alt="doxygen" align="middle" border=0 > 
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</a>1.3.5 </small></address>
 
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<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.0 </small></address>
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</body>
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</html>