<?xml version="1.0" encoding="ANSI_X3.4-1968" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>snd_rawmidi_transmit_peek</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="Linux Device Drivers" /><link rel="up" href="ch05.html" title="Chapter 5. Sound Devices" /><link rel="prev" href="re587.html" title="snd_rawmidi_transmit_empty" /><link rel="next" href="re589.html" title="snd_rawmidi_transmit_ack" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span>snd_rawmidi_transmit_peek</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re587.html">Prev</a> </td><th width="60%" align="center">Chapter 5. Sound Devices</th><td width="20%" align="right"> <a accesskey="n" href="re589.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="snd_rawmidi_transmit_peek"><a id="API-snd-rawmidi-transmit-peek"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>snd_rawmidi_transmit_peek — copy data from the internal buffer </p></div><div class="refsynopsisdiv" title="Synopsis"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0" class="funcprototype-table"><tr><td><code class="funcdef">int <b class="fsfunc">snd_rawmidi_transmit_peek </b>(</code></td><td>struct snd_rawmidi_substream * <var class="pdparam">substream</var>, </td></tr><tr><td> </td><td>unsigned char * <var class="pdparam">buffer</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">count</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1" title="Arguments"><a id="id2679632"></a><h2>Arguments</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>substream</code></em></span></dt><dd><p> the rawmidi substream </p></dd><dt><span class="term"><em class="parameter"><code>buffer</code></em></span></dt><dd><p> the buffer pointer </p></dd><dt><span class="term"><em class="parameter"><code>count</code></em></span></dt><dd><p> data size to transfer </p></dd></dl></div></div><div class="refsect1" title="Description"><a id="id2679694"></a><h2>Description</h2><p> Copies data from the internal output buffer to the given buffer. </p><p> Call this in the interrupt handler when the midi output is ready, and call <code class="function">snd_rawmidi_transmit_ack</code> after the transmission is finished. </p><p> Returns the size of copied data, or a negative error code on failure. </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re587.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch05.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="re589.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span>snd_rawmidi_transmit_empty</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> <span>snd_rawmidi_transmit_ack</span></td></tr></table></div></body></html>