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libalsa2-docs-1.0.28-1.mga5.noarch.rpm

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<div class="title">/test/pcm_min.c</div>  </div>
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<div class="contents">
<div class="fragment"><div class="line"><span class="comment">/*</span></div>
<div class="line"><span class="comment"> *  This extra small demo sends a random samples to your speakers.</span></div>
<div class="line"><span class="comment"> */</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include &quot;../include/asoundlib.h&quot;</span></div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keywordtype">char</span> *device = <span class="stringliteral">&quot;default&quot;</span>;            <span class="comment">/* playback device */</span></div>
<div class="line"></div>
<div class="line"><a class="code" href="group___output.html#ga49729cc6454539495c1f5b6e95cd474a">snd_output_t</a> *output = NULL;</div>
<div class="line"><span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buffer[16*1024];              <span class="comment">/* some random data */</span></div>
<div class="line"></div>
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">void</span>)</div>
<div class="line">{</div>
<div class="line">        <span class="keywordtype">int</span> err;</div>
<div class="line">        <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;</div>
<div class="line">        <a class="code" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *handle;</div>
<div class="line">        <a class="code" href="group___p_c_m.html#ga71cdfa37e258d2210b8bd0216bf0c36c">snd_pcm_sframes_t</a> frames;</div>
<div class="line"></div>
<div class="line">        <span class="keywordflow">for</span> (i = 0; i &lt; <span class="keyword">sizeof</span>(buffer); i++)</div>
<div class="line">                buffer[i] = random() &amp; 0xff;</div>
<div class="line"></div>
<div class="line">    <span class="keywordflow">if</span> ((err = <a name="a0"></a><a class="code" href="group___p_c_m.html#ga8340c7dc0ac37f37afe5e7c21d6c528b">snd_pcm_open</a>(&amp;handle, device, <a name="a1"></a><a class="code" href="group___p_c_m.html#ggac23b43ff55add78638e503b9cc892c24a57a2b920dbc34173479fc9036cfc78a1">SND_PCM_STREAM_PLAYBACK</a>, 0)) &lt; 0) {</div>
<div class="line">        printf(<span class="stringliteral">&quot;Playback open error: %s\n&quot;</span>, <a name="a2"></a><a class="code" href="group___error.html#ga182bbadf2349e11602bc531e8cf22f7e">snd_strerror</a>(err));</div>
<div class="line">        exit(EXIT_FAILURE);</div>
<div class="line">    }</div>
<div class="line">    <span class="keywordflow">if</span> ((err = <a name="a3"></a><a class="code" href="group___p_c_m.html#ga45d50841b307f2156fce1857bfac228c">snd_pcm_set_params</a>(handle,</div>
<div class="line">                                  <a name="a4"></a><a class="code" href="group___p_c_m.html#ggaa14b7f26877a812acbb39811364177f8ad5856f97113926836a7c6651cb8864a3">SND_PCM_FORMAT_U8</a>,</div>
<div class="line">                                  <a name="a5"></a><a class="code" href="group___p_c_m.html#gga661221ba5e8f1d6eaf4ab8e2da57cc1aa72a970ed6e676ab0fd9f3c3d36737e0a">SND_PCM_ACCESS_RW_INTERLEAVED</a>,</div>
<div class="line">                                  1,</div>
<div class="line">                                  48000,</div>
<div class="line">                                  1,</div>
<div class="line">                                  500000)) &lt; 0) {   <span class="comment">/* 0.5sec */</span></div>
<div class="line">        printf(<span class="stringliteral">&quot;Playback open error: %s\n&quot;</span>, <a class="code" href="group___error.html#ga182bbadf2349e11602bc531e8cf22f7e">snd_strerror</a>(err));</div>
<div class="line">        exit(EXIT_FAILURE);</div>
<div class="line">    }</div>
<div class="line"></div>
<div class="line">        <span class="keywordflow">for</span> (i = 0; i &lt; 16; i++) {</div>
<div class="line">                frames = <a name="a6"></a><a class="code" href="group___p_c_m.html#gabc748a500743713eafa960c7d104ca6f">snd_pcm_writei</a>(handle, buffer, <span class="keyword">sizeof</span>(buffer));</div>
<div class="line">                <span class="keywordflow">if</span> (frames &lt; 0)</div>
<div class="line">                        frames = <a name="a7"></a><a class="code" href="group___p_c_m.html#ga2157aaeb6fc14da3f040d76591f9d3b1">snd_pcm_recover</a>(handle, frames, 0);</div>
<div class="line">                <span class="keywordflow">if</span> (frames &lt; 0) {</div>
<div class="line">                        printf(<span class="stringliteral">&quot;snd_pcm_writei failed: %s\n&quot;</span>, <a class="code" href="group___error.html#ga182bbadf2349e11602bc531e8cf22f7e">snd_strerror</a>(err));</div>
<div class="line">                        <span class="keywordflow">break</span>;</div>
<div class="line">                }</div>
<div class="line">                <span class="keywordflow">if</span> (frames &gt; 0 &amp;&amp; frames &lt; (<span class="keywordtype">long</span>)<span class="keyword">sizeof</span>(buffer))</div>
<div class="line">                        printf(<span class="stringliteral">&quot;Short write (expected %li, wrote %li)\n&quot;</span>, (<span class="keywordtype">long</span>)<span class="keyword">sizeof</span>(buffer), frames);</div>
<div class="line">        }</div>
<div class="line"></div>
<div class="line">    <a name="a8"></a><a class="code" href="group___p_c_m.html#ga042aba7262a4cbb4d444b6fc08cb7124">snd_pcm_close</a>(handle);</div>
<div class="line">    <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
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