A section feed is a resource consisting of a PID filter and a set of section filters. Using this API, the client can set the properties of a section feed and to start/stop filtering. The API is defined as an abstract interface of the type dmx_section_feed_t. The functions that implement the interface should be defined static or module private. The client can get the handle of a section feed API by calling the function allocate_section_feed() in the demux API.

On demux platforms that provide section filtering in hardware, the Section Feed API implementation provides a software wrapper for the demux hardware. Other platforms may support only PID filtering in hardware, requiring that TS packets are converted to sections in software. In the latter case the Section Feed API implementation can be a client of the TS Feed API.