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<a id="framebuffer"></a>
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<a id="IndexFramebuffer" class="indexterm"></a>
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<h2>
<span class="refentrytitle">framebuffer</span>
</h2>
<p>framebuffer —
Read audio signals into 1 dimensional k-rate arrays and vice-versa with a specified buffer size.
</p>
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<div class="refsect1">
<a id="idm281472929051288"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>framebuffer</em></span> converts audio signals into a 1 dimensional k-rate array of a specified size. The size of the k-rate array must be larger than ksmps. It also converts 1 dimensional k-rate arrays back into audio signals, the k-rate arrays must be uninitialised and also be larger than ksmps in size. The buffer works as a circular buffer and may be used for doing frame based audio processing such as spectral analysis/synthesis or as a simple delay line.
</p>
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<div class="refsect1">
<a id="idm281472929046984"></a>
<h2>Syntax</h2>
<pre class="synopsis">kout[] <span class="command"><strong>framebuffer</strong></span> ain, isize</pre>
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<div class="refsect1">
<a id="idm281472929044776"></a>
<pre class="synopsis">aout <span class="command"><strong>framebuffer</strong></span> kin, isize</pre>
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<div class="refsect1">
<a id="idm281472929042984"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>isize</em></span> -- The amount of samples that the buffer will contain.
</p>
</div>
<div class="refsect1">
<a id="idm281472928979240"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kout[]</em></span> -- The k-rate array output from the framebuffer.
<span class="emphasis"><em>ain</em></span> -- The audio signal input to the framebuffer.
</p>
<p>
<span class="emphasis"><em>aout</em></span> -- The audio signal output from the framebuffer.
<span class="emphasis"><em>kin</em></span> -- The k-rate array input to the framebuffer.
</p>
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<div class="refsect1">
<a id="idm281472928975736"></a>
<h2>Examples</h2>
<p>
Here is a simple example of the framebuffer opcode. It uses the file <a class="ulink" href="examples/framebuffer.csd" target="_top"><em class="citetitle">framebuffer.csd</em></a>.
</p>
<div class="example">
<a id="idm281472928973944"></a>
<p class="title">
<strong>Example 352. Example of the framebuffer opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472759916104"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
-odac
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">128</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">size</span> <span class="nb">init</span> <span class="mi">1024</span>
i<span class="n">overlaps</span> <span class="nb">init</span> <span class="mi">4</span>
a<span class="n">sig</span> <span class="nb">diskin2</span> <span class="s">"fox.wav"</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span>
k<span class="n">frame</span><span class="p">[]</span> <span class="nb">framebuffer</span> a<span class="n">sig</span><span class="p">,</span> i<span class="n">size</span>
k<span class="n">windowedFrame</span><span class="p">[]</span> <span class="nb">window</span> k<span class="n">frame</span><span class="p">,</span> i<span class="n">size</span>
a<span class="n">out</span> <span class="nb">olabuffer</span> k<span class="n">windowedFrame</span><span class="p">,</span> i<span class="n">overlaps</span>
a<span class="n">out</span> <span class="o">=</span> a<span class="n">out</span> <span class="o">/</span> <span class="mi">2</span>
<span class="nb">outs</span> a<span class="n">out</span><span class="p">,</span> a<span class="n">out</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">400</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472928969656"></a>
<h2>See Also</h2>
<p>
<a class="link" href="olabuffer.html" title="olabuffer"><em class="citetitle">olabuffer</em></a>
<a class="link" href="shiftin.html" title="shiftin"><em class="citetitle">shiftin</em></a>
<a class="link" href="shiftout.html" title="shiftout"><em class="citetitle">shiftout</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472928965400"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Edward Costello;</td>
</tr>
<tr>
<td>NUIM, 2015</td>
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<p>New in version 6.06</p>
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