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3.4.4
Video Capture Driver
Figure 17: Working Principle of Video Capture
V4L2 Subsystem:
The V4L2 subsystem of a Linux system works as the medium layer which
helps access the camera driver. The upper-layer applications of the camera
can access drivers through the API of the V4L2. The V4L2 subsystem of the
Linux 2.6 core is designed based on the V4L2 standard.
Video Buffer Library:
The Video Buffer Library is a part of the V4L2. It provides an assistance
function to effectively manage the video buffer via a queuing method.
Camera Driver:
The Camera driver allows external codecs to capture video images. It is
registered to layer V4L2 as a master device. Any codec driver that is added
to layer V4L2 as a slave device will be associated with the camera
controller driver through a new V4L2 master-slave interface. Currently the
Summary of Contents for SBC8140
Page 1: ...SBC8140 Single Board Computer User Manual Version 1 1 22nd Jan 2014...
Page 12: ...Page 6 1 4 Interfaces on the SBC8140 Figure 4 SBC8140 Interfaces...
Page 13: ...Page 7 1 5 System Block Diagram Figure 5 SBC8140 system block diagram...
Page 15: ...Page 9 1 6 2 Expansion Board Figure 8 Expansion board dimensions...
Page 128: ...Page 122...
Page 131: ...Page 125...
Page 139: ...Page 133 Appendix 5 FAQ Please visit http www elinux org SBC8600_FAQ...