1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>enum vb2_buffer_state</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux Device Drivers"><link rel="up" href="mediadev.html#id-1.8.2" title="Video2Linux devices"><link rel="prev" href="API-enum-vb2-io-modes.html" title="enum vb2_io_modes"><link rel="next" href="API-struct-vb2-buffer.html" title="struct vb2_buffer"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">enum vb2_buffer_state</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-enum-vb2-io-modes.html">Prev</a> </td><th width="60%" align="center">Video2Linux devices</th><td width="20%" align="right"> <a accesskey="n" href="API-struct-vb2-buffer.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-enum-vb2-buffer-state"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>enum vb2_buffer_state — 
2     current video buffer state
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting">
4enum vb2_buffer_state {
5  VB2_BUF_STATE_DEQUEUED,
6  VB2_BUF_STATE_PREPARING,
7  VB2_BUF_STATE_PREPARED,
8  VB2_BUF_STATE_QUEUED,
9  VB2_BUF_STATE_REQUEUEING,
10  VB2_BUF_STATE_ACTIVE,
11  VB2_BUF_STATE_DONE,
12  VB2_BUF_STATE_ERROR
13};  </pre></div><div class="refsect1"><a name="id-1.8.2.91.5"></a><h2>Constants</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term">VB2_BUF_STATE_DEQUEUED</span></dt><dd><p>
14   buffer under userspace control
15      </p></dd><dt><span class="term">VB2_BUF_STATE_PREPARING</span></dt><dd><p>
16   buffer is being prepared in videobuf
17      </p></dd><dt><span class="term">VB2_BUF_STATE_PREPARED</span></dt><dd><p>
18   buffer prepared in videobuf and by the driver
19      </p></dd><dt><span class="term">VB2_BUF_STATE_QUEUED</span></dt><dd><p>
20   buffer queued in videobuf, but not in driver
21      </p></dd><dt><span class="term">VB2_BUF_STATE_REQUEUEING</span></dt><dd><p>
22   re-queue a buffer to the driver
23      </p></dd><dt><span class="term">VB2_BUF_STATE_ACTIVE</span></dt><dd><p>
24   buffer queued in driver and possibly used
25   in a hardware operation
26      </p></dd><dt><span class="term">VB2_BUF_STATE_DONE</span></dt><dd><p>
27   buffer returned from driver to videobuf, but
28   not yet dequeued to userspace
29      </p></dd><dt><span class="term">VB2_BUF_STATE_ERROR</span></dt><dd><p>
30   same as above, but the operation on the buffer
31   has ended with an error, which will be reported
32   to the userspace when it is dequeued
33      </p></dd></dl></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-enum-vb2-io-modes.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="mediadev.html#id-1.8.2">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="API-struct-vb2-buffer.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">enum vb2_io_modes</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span class="phrase">struct vb2_buffer</span></td></tr></table></div></body></html>
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