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<h1>pacat-simple.c</h1>A simple playback tool using the simple API<p>
<div class="fragment"><pre class="fragment"><span class="comment">/***</span>
<span class="comment"> This file is part of PulseAudio.</span>
<span class="comment"></span>
<span class="comment"> PulseAudio is free software; you can redistribute it and/or modify</span>
<span class="comment"> it under the terms of the GNU Lesser General Public License as published</span>
<span class="comment"> by the Free Software Foundation; either version 2.1 of the License,</span>
<span class="comment"> or (at your option) any later version.</span>
<span class="comment"></span>
<span class="comment"> PulseAudio is distributed in the hope that it will be useful, but</span>
<span class="comment"> WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<span class="comment"> General Public License for more details.</span>
<span class="comment"></span>
<span class="comment"> You should have received a copy of the GNU Lesser General Public License</span>
<span class="comment"> along with PulseAudio; if not, write to the Free Software</span>
<span class="comment"> Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307</span>
<span class="comment"> USA.</span>
<span class="comment">***/</span>
<span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<span class="preprocessor"></span><span class="preprocessor">#include <config.h></span>
<span class="preprocessor">#endif</span>
<span class="preprocessor"></span>
<span class="preprocessor">#include <stdio.h></span>
<span class="preprocessor">#include <unistd.h></span>
<span class="preprocessor">#include <string.h></span>
<span class="preprocessor">#include <errno.h></span>
<span class="preprocessor">#include <fcntl.h></span>
<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>
<span class="preprocessor">#include <<a class="code" href="error_8h.html" title="Error management.">pulse/error.h</a>></span>
<span class="preprocessor">#include <<a class="code" href="gccmacro_8h.html" title="GCC attribute macros.">pulse/gccmacro.h</a>></span>
<span class="preprocessor">#define BUFSIZE 1024</span>
<span class="preprocessor"></span>
<span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span>*argv[]) {
<span class="comment">/* The Sample format to use */</span>
<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 = {
.format = <a name="a1"></a><a class="code" href="sample_8h.html#3c622fc51f4fc6ebfdcc7b454ac9c05f50e4a2b43c258e559fa9d252275131ce" title="Signed 16 Bit PCM, little endian (PC).">PA_SAMPLE_S16LE</a>,
.rate = 44100,
.channels = 2
};
<a name="_a2"></a><a class="code" href="structpa__simple.html" title="An opaque simple connection object.">pa_simple</a> *s = NULL;
<span class="keywordtype">int</span> ret = 1;
<span class="keywordtype">int</span> error;
<span class="comment">/* replace STDIN with the specified file if needed */</span>
<span class="keywordflow">if</span> (argc > 1) {
<span class="keywordtype">int</span> fd;
<span class="keywordflow">if</span> ((fd = open(argv[1], O_RDONLY)) < 0) {
fprintf(stderr, __FILE__<span class="stringliteral">": open() failed: %s\n"</span>, strerror(errno));
<span class="keywordflow">goto</span> finish;
}
<span class="keywordflow">if</span> (dup2(fd, STDIN_FILENO) < 0) {
fprintf(stderr, __FILE__<span class="stringliteral">": dup2() failed: %s\n"</span>, strerror(errno));
<span class="keywordflow">goto</span> finish;
}
close(fd);
}
<span class="comment">/* Create a new playback stream */</span>
<span class="keywordflow">if</span> (!(s = <a name="a3"></a><a class="code" href="simple_8h.html#dd9a7dce4e15955d4296726c26206689" title="Create a new connection to the server.">pa_simple_new</a>(NULL, argv[0], <a name="a4"></a><a class="code" href="def_8h.html#7311932553b3f7962a092906576bc347cf403563d8f87f59f73c9674fee5a166" title="Playback stream.">PA_STREAM_PLAYBACK</a>, NULL, <span class="stringliteral">"playback"</span>, &ss, NULL, NULL, &error))) {
fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_new() failed: %s\n"</span>, <a name="a5"></a><a class="code" href="error_8h.html#593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));
<span class="keywordflow">goto</span> finish;
}
<span class="keywordflow">for</span> (;;) {
uint8_t buf[BUFSIZE];
ssize_t r;
<span class="preprocessor">#if 0</span>
<span class="preprocessor"></span> <a name="a6"></a><a class="code" href="sample_8h.html#885df3b973773f0dccbbec6bc6777f89" title="Type for usec specifications (unsigned).">pa_usec_t</a> latency;
<span class="keywordflow">if</span> ((latency = <a name="a7"></a><a class="code" href="simple_8h.html#613419d24e0fd8909dd4d01897d2fa49" title="Return the playback latency.">pa_simple_get_latency</a>(s, &error)) == (<a class="code" href="sample_8h.html#885df3b973773f0dccbbec6bc6777f89" title="Type for usec specifications (unsigned).">pa_usec_t</a>) -1) {
fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_get_latency() failed: %s\n"</span>, <a class="code" href="error_8h.html#593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));
<span class="keywordflow">goto</span> finish;
}
fprintf(stderr, <span class="stringliteral">"%0.0f usec \r"</span>, (<span class="keywordtype">float</span>)latency);
<span class="preprocessor">#endif</span>
<span class="preprocessor"></span>
<span class="comment">/* Read some data ... */</span>
<span class="keywordflow">if</span> ((r = read(STDIN_FILENO, buf, <span class="keyword">sizeof</span>(buf))) <= 0) {
<span class="keywordflow">if</span> (r == 0) <span class="comment">/* EOF */</span>
<span class="keywordflow">break</span>;
fprintf(stderr, __FILE__<span class="stringliteral">": read() failed: %s\n"</span>, strerror(errno));
<span class="keywordflow">goto</span> finish;
}
<span class="comment">/* ... and play it */</span>
<span class="keywordflow">if</span> (<a name="a8"></a><a class="code" href="simple_8h.html#f40711a9181c003b71074678c11372af" title="Write some data to the server.">pa_simple_write</a>(s, buf, (<span class="keywordtype">size_t</span>) r, &error) < 0) {
fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_write() failed: %s\n"</span>, <a class="code" href="error_8h.html#593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));
<span class="keywordflow">goto</span> finish;
}
}
<span class="comment">/* Make sure that every single sample was played */</span>
<span class="keywordflow">if</span> (<a name="a9"></a><a class="code" href="simple_8h.html#28d1c33441b1bd6e7486cf299cf98233" title="Wait until all data already written is played by the daemon.">pa_simple_drain</a>(s, &error) < 0) {
fprintf(stderr, __FILE__<span class="stringliteral">": pa_simple_drain() failed: %s\n"</span>, <a class="code" href="error_8h.html#593deb681fba75fad4b3a2d65d0ac2b2" title="Return a human readable error message for the specified numeric error code.">pa_strerror</a>(error));
<span class="keywordflow">goto</span> finish;
}
ret = 0;
finish:
<span class="keywordflow">if</span> (s)
<a name="a10"></a><a class="code" href="simple_8h.html#d66a88bc23d2a54542df441ff472c389" title="Close and free the connection to the server.">pa_simple_free</a>(s);
<span class="keywordflow">return</span> ret;
}
</pre></div> </div>
<hr size="1"><address style="text-align: right;"><small>Generated on Wed Sep 2 04:18:19 2009 for PulseAudio by
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distrib
>
Mandriva
>
2009.1
>
x86_64
>
media
>
main-testing
>
by-pkgid
>
187676b5433787923dfa2cdd6900c6cd
>
files
>
134
