V4L2 FPGA - Introduction - Sink

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A sink is a device that can receive frames or a video stream from user space and encodes it in order to be transmitted. It can be to either a display or to another kind of device.

This device might also enable us to query the capabilities of the receiving device such as the desired format, number of bits per pixel, width, and height. It can also configure the output to receive one of the outputs being offered.

This project will implement a V4L2 sink which will send frames to a device connected through a PCI-e or AXI interface. This allows sending the image to a display connected in this interface or to an HW accelerated algorithm whose output will later be extracted by the frame grabber.

On the other hand, it is possible to connect custom hardware that can interact with the image. Some examples:

  • Custom displays (custom standard)
  • Tri-dimensional LED arrays
  • Actuators

Topology

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