1. Video Gala Frame Grabber device driver
Project Presentation
Sean Toh
Atulya Mahajan

2. Linux Kernel Programming
Presentation Outline
> Goals
> Methodology
> Achievements
> Screen Shots
> Source Tree
> Known Bugs
> Next Steps
11/30/2018
Linux Kernel Programming

3. Linux Kernel Programming
Goals
> Produce a device driver for the video gala gray scale and color frame grabber devices
> Desired features
- Integrated support for color and grayscale
- Support for dual ported and single ported cards
- Support for Interrupt driven I/O
- Streaming I/O ( this hasn’t been implemented so far for the color devices)
- Video 4 Linux 2 API support
11/30/2018
Linux Kernel Programming

4. Linux Kernel Programming
Methodology
> Started from the bare bones driver provided by Dr Baker
> Initial changes to make the module stable
> Incorporated the support for color reads
> Incorporated the streaming I/O ( Grey scale) from device driver produced in summer 2003
> Added support for color streaming I/O
> Modified read/streaming functionality to work with the interrupt driven cards
> Implemented the support for V4L API
> Journal
11/30/2018
Linux Kernel Programming

5. Linux Kernel Programming
Achievements
> We achieved almost all of our goals
- Streaming I/O
- Blocking reads
- Interrupt driven I/O
- Support for V4L
- Support for color cards
- Improvements to the demo program
- Added one ioctl to turn the output upside down. Necessity is the mother of invention they say !
11/30/2018
Linux Kernel Programming

6. Screen Shot - Grey Scale (512 X 480)
11/30/2018
Linux Kernel Programming

7. Linux Kernel Programming
Screen Shot - Color (640 X 480)
11/30/2018
Linux Kernel Programming

8. Linux Kernel Programming
Video Output
Grey Scale output
Color Output
11/30/2018
Linux Kernel Programming

9. Linux Kernel Programming
Source Tree
Module code - HRT
- hrt.c
- hrt.h
- Makefile
- README
Demo program
- hrtdemo.c
- hrtdemo.h
- hrt.h
- Makefile
- README
11/30/2018
Linux Kernel Programming

10. Linux Kernel Programming
Known Bugs / Issues
> Speed issues – not yet perfect. Can be improved further
> Test program crashes sometimes. Not repeatable. Source not yet known
> Support for video 4 Linux not completely implemented yet
> Poor quality of inverted mode display
11/30/2018
Linux Kernel Programming

11. Linux Kernel Programming
Next Steps
> Optimization of timing issues to achieve higher frame rates
> Completion of video 4 Linux support
> Optimization of the interrupt driven mode
> Solve known bugs / stabilize the module
> Improve the test program
11/30/2018
Linux Kernel Programming

12. Thank you !!!