Custom Plug-ins

There are specific functions, like video decoder, encoder, meta-affixer etc. where the requirements are different and are difficult to implement in an optimized way using highly simplified and generic infrastructure plug-ins framework. Hence, these functions are implemented using custom GStreamer plug-ins. This section covers details about the custom plug-ins.

Infrastructure plug-ins are generic plug-ins that interact with the acceleration kernel through a set of APIs exposed by an acceleration software library corresponding to that kernel. Infrastructure plug-ins abstract the core/common functionality of the GStreamer framework (for example: caps negotiation and buffer management).

Acceleration software libraries control the acceleration kernel, like register programming, or any other core logic required to implement the functions. Acceleration software libraries expose a simplified interface that is called by the GStreamer infrastructure plug-ins to interact with the acceleration kernel.These libraries are used with one of the infrastructure plug-ins to use the functionality a GStreamer-based application. Example pipelines with GStreamer infrastructure plug-ins and acceleration software libraries are covered later in this section.

GStreamer infrastructure plug-ins are available in the vvas-gst-plugins folder in the vvas source code tree. The following section describes each infrastructure plug-in.

• vvas_xmetaaffixer

• vvas_xabrscaler

• vvas_xinfer

• vvas_xoptflow

• vvas_xoverlay

• vvas_xtracker

• vvas_xskipframe

• vvas_xreorderframe

• vvas_xmetaconvert

• vvas_xfunnel

• vvas_xdefunnel

• vvas_xmulticrop

• vvas_xcompositor

• VVAS Bufferpool & Allocator