<!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/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.3"/> <title>PulseAudio: pacat-simple.c</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="navtree.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="resize.js"></script> <script type="text/javascript" src="navtree.js"></script> <script type="text/javascript"> $(document).ready(initResizable); $(window).load(resizeHeight); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td style="padding-left: 0.5em;"> <div id="projectname">PulseAudio  <span id="projectnumber">2.1</span> </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.3 --> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="annotated.html"><span>Data Structures</span></a></li> <li><a href="files.html"><span>Files</span></a></li> <li><a href="examples.html"><span>Examples</span></a></li> </ul> </div> </div><!-- top --> <div id="side-nav" class="ui-resizable side-nav-resizable"> <div id="nav-tree"> <div id="nav-tree-contents"> <div id="nav-sync" class="sync"></div> </div> </div> <div id="splitbar" style="-moz-user-select:none;" class="ui-resizable-handle"> </div> </div> <script type="text/javascript"> $(document).ready(function(){initNavTree('pacat-simple_8c-example.html','');}); </script> <div id="doc-content"> <div class="header"> <div class="headertitle"> <div class="title">pacat-simple.c</div> </div> </div><!--header--> <div class="contents"> <p>A simple playback tool using the simple API</p> <div class="fragment"><div class="line"><span class="comment">/***</span></div> <div class="line"><span class="comment"> This file is part of PulseAudio.</span></div> <div class="line"><span class="comment"></span></div> <div class="line"><span class="comment"> PulseAudio is free software; you can redistribute it and/or modify</span></div> <div class="line"><span class="comment"> it under the terms of the GNU Lesser General Public License as published</span></div> <div class="line"><span class="comment"> by the Free Software Foundation; either version 2.1 of the License,</span></div> <div class="line"><span class="comment"> or (at your option) any later version.</span></div> <div class="line"><span class="comment"></span></div> <div class="line"><span class="comment"> PulseAudio is distributed in the hope that it will be useful, but</span></div> <div class="line"><span class="comment"> WITHOUT ANY WARRANTY; without even the implied warranty of</span></div> <div class="line"><span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div> <div class="line"><span class="comment"> General Public License for more details.</span></div> <div class="line"><span class="comment"></span></div> <div class="line"><span class="comment"> You should have received a copy of the GNU Lesser General Public License</span></div> <div class="line"><span class="comment"> along with PulseAudio; if not, write to the Free Software</span></div> <div class="line"><span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307</span></div> <div class="line"><span class="comment"> USA.</span></div> <div class="line"><span class="comment">***/</span></div> <div class="line"></div> <div class="line"><span class="preprocessor">#ifdef HAVE_CONFIG_H</span></div> <div class="line"><span class="preprocessor"></span><span class="preprocessor">#include <config.h></span></div> <div class="line"><span class="preprocessor">#endif</span></div> <div class="line"><span class="preprocessor"></span></div> <div class="line"><span class="preprocessor">#include <stdio.h></span></div> <div class="line"><span class="preprocessor">#include <unistd.h></span></div> <div class="line"><span class="preprocessor">#include <string.h></span></div> <div class="line"><span class="preprocessor">#include <errno.h></span></div> <div class="line"><span class="preprocessor">#include <fcntl.h></span></div> <div class="line"></div> <div class="line"><span class="preprocessor">#include <<a class="code" href="simple_8h.html" title="A simple but limited synchronous playback and recording API.">pulse/simple.h</a>></span></div> <div class="line"><span class="preprocessor">#include <<a class="code" href="error_8h.html" title="Error management.">pulse/error.h</a>></span></div> <div class="line"></div> <div class="line"><span class="preprocessor">#define BUFSIZE 1024</span></div> <div class="line"><span class="preprocessor"></span></div> <div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span>*argv[]) {</div> <div class="line"></div> <div class="line"> <span class="comment">/* The Sample format to use */</span></div> <div class="line"> <span class="keyword">static</span> <span class="keyword">const</span> <a name="_a0"></a><a class="code" href="structpa__sample__spec.html" title="A sample format and attribute specification.">pa_sample_spec</a> ss = {</div> <div class="line"> .<a name="a1"></a><a class="code" href="structpa__sample__spec.html#a6f37954f1b7ac9d9bff4683171a10a99" title="The sample format.">format</a> = <a name="a2"></a><a class="code" href="sample_8h.html#a3c622fc51f4fc6ebfdcc7b454ac9c05fa50e4a2b43c258e559fa9d252275131ce" title="Signed 16 Bit PCM, little endian (PC)">PA_SAMPLE_S16LE</a>,</div> <div class="line"> .rate = 44100,</div> <div class="line"> .channels = 2</div> <div class="line"> };</div> <div class="line"></div> <div class="line"> <a name="_a3"></a><a class="code" href="structpa__simple.html" title="An opaque simple connection object.">pa_simple</a> *s = NULL;</div> <div class="line"> <span class="keywordtype">int</span> ret = 1;</div> <div class="line"> <span class="keywordtype">int</span> error;</div> <div class="line"></div> <div class="line"> <span class="comment">/* replace STDIN with the specified file if needed */</span></div> <div class="line"> <span class="keywordflow">if</span> (argc > 1) {</div> <div class="line"> <span class="keywordtype">int</span> fd;</div> <div class="line"></div> <div class="line"> <span class="keywordflow">if</span> ((fd = open(argv[1], O_RDONLY)) < 0) {</div> <div class="line"> fprintf(stderr, __FILE__<span class="stringliteral">": open() failed: %s\n"</span>, strerror(errno));</div> <div class="line"> <span class="keywordflow">goto</span> finish;</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> <span class="keywordflow">if</span> (dup2(fd, STDIN_FILENO) < 0) {</div> <div class="line"> fprintf(stderr, __FILE__<span class="stringliteral">": dup2() failed: %s\n"</span>, strerror(errno));</div> <div class="line"> <span class="keywordflow">goto</span> finish;</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> close(fd);</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> <span class="comment">/* Create a new playback stream */</span></div> <div class="line"> <span class="keywordflow">if</span> (!(s = <a name="a4"></a><a class="code" href="simple_8h.html#add9a7dce4e15955d4296726c26206689" title="Create a new connection to the server.">pa_simple_new</a>(NULL, argv[0], <a name="a5"></a><a class="code" href="def_8h.html#a7311932553b3f7962a092906576bc347acf403563d8f87f59f73c9674fee5a166" title="Playback stream.">PA_STREAM_PLAYBACK</a>, NULL, <span class="stringliteral">"playback"</span>, &ss, NULL, NULL, &error))) {</div> <div class="line"> fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_new() failed: %s\n"</span>, <a name="a6"></a><a class="code" href="error_8h.html#a593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));</div> <div class="line"> <span class="keywordflow">goto</span> finish;</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> <span class="keywordflow">for</span> (;;) {</div> <div class="line"> uint8_t buf[BUFSIZE];</div> <div class="line"> ssize_t r;</div> <div class="line"></div> <div class="line"><span class="preprocessor">#if 0</span></div> <div class="line"><span class="preprocessor"></span> <a class="code" href="sample_8h.html#a885df3b973773f0dccbbec6bc6777f89" title="Type for usec specifications (unsigned).">pa_usec_t</a> latency;</div> <div class="line"></div> <div class="line"> <span class="keywordflow">if</span> ((latency = <a name="a7"></a><a class="code" href="simple_8h.html#a613419d24e0fd8909dd4d01897d2fa49" title="Return the playback latency.">pa_simple_get_latency</a>(s, &error)) == (<a class="code" href="sample_8h.html#a885df3b973773f0dccbbec6bc6777f89" title="Type for usec specifications (unsigned).">pa_usec_t</a>) -1) {</div> <div class="line"> fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_get_latency() failed: %s\n"</span>, <a class="code" href="error_8h.html#a593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));</div> <div class="line"> <span class="keywordflow">goto</span> finish;</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> fprintf(stderr, <span class="stringliteral">"%0.0f usec \r"</span>, (<span class="keywordtype">float</span>)latency);</div> <div class="line"><span class="preprocessor">#endif</span></div> <div class="line"><span class="preprocessor"></span></div> <div class="line"> <span class="comment">/* Read some data ... */</span></div> <div class="line"> <span class="keywordflow">if</span> ((r = read(STDIN_FILENO, buf, <span class="keyword">sizeof</span>(buf))) <= 0) {</div> <div class="line"> <span class="keywordflow">if</span> (r == 0) <span class="comment">/* EOF */</span></div> <div class="line"> <span class="keywordflow">break</span>;</div> <div class="line"></div> <div class="line"> fprintf(stderr, __FILE__<span class="stringliteral">": read() failed: %s\n"</span>, strerror(errno));</div> <div class="line"> <span class="keywordflow">goto</span> finish;</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> <span class="comment">/* ... and play it */</span></div> <div class="line"> <span class="keywordflow">if</span> (<a name="a8"></a><a class="code" href="simple_8h.html#af40711a9181c003b71074678c11372af" title="Write some data to the server.">pa_simple_write</a>(s, buf, (<span class="keywordtype">size_t</span>) r, &error) < 0) {</div> <div class="line"> fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_write() failed: %s\n"</span>, <a class="code" href="error_8h.html#a593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));</div> <div class="line"> <span class="keywordflow">goto</span> finish;</div> <div class="line"> }</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> <span class="comment">/* Make sure that every single sample was played */</span></div> <div class="line"> <span class="keywordflow">if</span> (<a name="a9"></a><a class="code" href="simple_8h.html#a28d1c33441b1bd6e7486cf299cf98233" title="Wait until all data already written is played by the daemon.">pa_simple_drain</a>(s, &error) < 0) {</div> <div class="line"> fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_drain() failed: %s\n"</span>, <a class="code" href="error_8h.html#a593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));</div> <div class="line"> <span class="keywordflow">goto</span> finish;</div> <div class="line"> }</div> <div class="line"></div> <div class="line"> ret = 0;</div> <div class="line"></div> <div class="line">finish:</div> <div class="line"></div> <div class="line"> <span class="keywordflow">if</span> (s)</div> <div class="line"> <a name="a10"></a><a class="code" href="simple_8h.html#ad66a88bc23d2a54542df441ff472c389" title="Close and free the connection to the server.">pa_simple_free</a>(s);</div> <div class="line"></div> <div class="line"> <span class="keywordflow">return</span> ret;</div> <div class="line">}</div> </div><!-- fragment --> </div><!-- contents --> </div><!-- doc-content --> <!-- start footer part --> <div id="nav-path" class="navpath"><!-- id is needed for treeview function! --> <ul> <li class="footer">Generated by <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.3 </li> </ul> 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