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<h1>frei0r - a minimalistic plugin API for video effects</h1>
<p>
<h2><a class="anchor" name="sec_intro">
Introduction</a></h2>
This is frei0r - a minimalistic plugin API for video effects.<p>
The main emphasis is on simplicity - there are many different applications that use video effects, and they all have different requirements regarding their internal plugin API. And that's why frei0r does not try to be a one-in-all general video plugin API, but instead an API for the most common video effects: simple filters, sources and mixers that can be controlled by parameters.<p>
It's our hope that this way these simple effects can be shared between many applications, avoiding their reimplementation by different projects.<p>
On the other hand, this is not meant as a competing standard to more ambitious efforts that try to satisfy the needs of many different applications and more complex effects.<h2><a class="anchor" name="sec_overview">
Overview</a></h2>
If you are new to frei0r, the best thing is probably to have a look at the <a href="frei0r_8h-source.html">frei0r header</a>, which is quite simple.<p>
After that, you might want to look at the <a href="frei0r_8h.html">frei0r functions</a> in more detail.<p>
When developing a new frei0r effect, you have to choose<ul>
<li>which effect type to use (<a class="el" href="group__PLUGIN__TYPE.html">Type of the Plugin</a>),</li><li>which color model to use (<a class="el" href="group__COLOR__MODEL.html">Color Models</a>), and</li><li>which parameter types (<a class="el" href="group__PARAM__TYPE.html">Parameter Types</a>) your effect will support.</li></ul>
<p>
To round things up, you should decide whether your effect should have an associated icon (<a class="el" href="group__icons.html">Icons for frei0r effects</a>), and where it will be installed (<a class="el" href="group__pluglocations.html">Plugin Locations</a>).<h2><a class="anchor" name="sec_changes">
Changes</a></h2>
<h3><a class="anchor" name="sec_changes_1_0_1_1">
From frei0r 1.0 to frei0r 1.1</a></h3>
<ul>
<li>added specifications for plugin locations</li><li>added specifications for frei0r icons</li><li>added RGBA8888 color model</li><li>added packed32 color model</li><li>added better specification of color models</li><li>added string type</li><li>added bounds to resolution (8 <= width, height <= 2048)</li><li>width and height must be an integer multiple of 8</li><li>frame data must be 16 byte aligned</li><li>improved update specification (must not change parameters, must restore fpu state)</li><li>added note for applications to ignore effects with unknown fields</li><li>added new plugin types mixer2 and mixer3</li><li>added section about <a class="el" href="group__concurrency.html">Concurrency</a> </li></ul>
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