Middleware ( Native Driver Interface )
Linux Kernel
Applications
Camera App
Native C/C+ Libraries
V4L2
Application Framework
GStreamer
GUI
DRM / KMS
Wayland
BACKEND ( GUI )
DRM / KMS
Wayland
...
Multimedia
Python Libraries
libcamera
PLUGINS ( GStreamer )
v4l2src, v4l2h264enc,
libcamerasrc, etc ...
Picamera2
. . .
. . .
Drivers
...
USB
CODEC