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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE chapter>
<!-- Copyright (C) 2005-2018 Jo\u00EBl Kr\u00E4hemann -->
<!-- Permission is granted to copy, distribute and/or modify this document -->
<!-- under the terms of the GNU Free Documentation License, Version 1.3 -->
<!-- or any later version published by the Free Software Foundation; -->
<!-- with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. -->
<!-- A copy of the license is included in the section entitled "GNU -->
<!-- Free Documentation License". -->
<chapter xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude" version="5.0">
<title>Advanced Gtk+ Sequencer's fx engine</title>
<para>
There a well know set of recalls described here. Additionally you might
want to take advantage of recalls interfacing plugin APIs like LADSPA, DSSI
or LV2. You can instantiate them simply with
<code language="C">GList* ags_fx_factory_create(AgsAudio*, AgsRecallContainer*, AgsRecallContainer*, gchar*, gchar *, gchar *, guint, guint, guint, guint, gint, guint, guint)</code>
</para>
<example>
<title>Using ags_fx_factory_create()</title>
<programlisting language="C">
<xi:include href="../listings/fx_factory.c" parse="text" />
</programlisting>
</example>
<variablelist>
<varlistentry>
<term>
<code>ags-fx-buffer</code>
</term>
<listitem>
<para>
Buffer audio data, produces new destination as on source occurs
AgsRecycling::add_audio_signal().
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-playback</code>
</term>
<listitem>
<para>
Play or capture audio data and store it in wave objects.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-volume</code>
</term>
<listitem>
<para>
Adjust volume of audio data.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-peak</code>
</term>
<listitem>
<para>
Calculate peak of audio data.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-eq10</code>
</term>
<listitem>
<para>
Adjust 10 band equalizer.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-analyse</code>
</term>
<listitem>
<para>
Get frequency hints using FFTW3.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-envelope</code>
</term>
<listitem>
<para>
Apply envelope data per piano roll note or pattern note.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-pattern</code>
</term>
<listitem>
<para>
Play audio data based on boolean patterns.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-notation</code>
</term>
<listitem>
<para>
Play, capture and feed audio data based on notation.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-ladspa</code>
</term>
<listitem>
<para>
Interface LADSPA plugins.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-dssi</code>
</term>
<listitem>
<para>
Interface DSSI plugins.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-lv2</code>
</term>
<listitem>
<para>
Interface LV2 plugins.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
<code>ags-fx-vst3</code>
</term>
<listitem>
<para>
Interface VST3 plugins - requires libags-vst.so to be available.
</para>
</listitem>
</varlistentry>
</variablelist>
</chapter>
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