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<title>libogg - function - ogg_sync_pageout</title>
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<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.5 - 20210603</p></td>
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<h1>ogg_sync_pageout</h1>
<p><i>declared in "ogg/ogg.h";</i></p>
<p>This function takes the data stored in the buffer of the <a href="ogg_sync_state.html">ogg_sync_state</a> struct and inserts them into an <a href="ogg_page.html">ogg_page</a>.
<p>In an actual decoding loop, this function should be called first to ensure that the buffer is cleared. The example code below illustrates a clean reading loop which will fill and output pages.
<p><b>Caution:</b>This function should be called before reading into the buffer to ensure that data does not remain in the ogg_sync_state struct. Failing to do so may result in a memory leak. See the example code below for details.
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<pre><b>
int ogg_sync_pageout(<a href="ogg_sync_state.html">ogg_sync_state</a> *oy, <a href="ogg_page.html">ogg_page</a> *og);
</b></pre>
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<h3>Parameters</h3>
<dl>
<dt><i>oy</i></dt>
<dd>Pointer to a previously declared <a href="ogg_sync_state.html">ogg_sync_state</a> struct. Normally, the internal storage of this struct should be filled with newly read data and verified using <a href="ogg_sync_wrote.html">ogg_sync_wrote</a>.</dd>
<dt><i>og</i></dt>
<dd>Pointer to page struct filled by this function.
</dl>
<h3>Return Values</h3>
<blockquote>
<li>-1 returned if stream has not yet captured sync (bytes were skipped).</li>
<li>0 returned if more data needed or an internal error occurred.</li>
<li>1 indicated a page was synced and returned.</li>
</blockquote>
<p>
<h3>Example Usage</h3>
<pre>
if (ogg_sync_pageout(&oy, &og) != 1) {
buffer = ogg_sync_buffer(&oy, 8192);
bytes = fread(buffer, 1, 8192, stdin);
ogg_sync_wrote(&oy, bytes);
}
</pre>
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<td><p class=tiny>copyright © 2000-2021 Xiph.Org Foundation</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
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<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.5 - 20210603</p></td>
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