Linux on ARM SoCs with HW video decoders that are separate to the GPU can use the V4L2 API to avoid some copying. The decoder writes a frame to a buffer that th

Linux on ARM SoCs with HW video decoders that are separate to the GPU can use the V4L2 API to avoid some copying. The decoder writes a frame to a buffer that the GPU can see then you use GL to get the GPU to merge it into the framebuffer.