Rev 174 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 170 | giacomo | 1 | Project: S.Ha.R.K. |
| 2 | |||
| 3 | Frame Grabber support from BTTV linux driver |
||
| 4 | |||
| 5 | Coordinators: |
||
| 6 | |||
| 7 | Giorgio Buttazzo <giorgio@sssup.it> |
||
| 8 | Paolo Gai <pj@gandalf.sssup.it> |
||
| 9 | |||
| 10 | Authors: |
||
| 11 | |||
| 12 | Giacomo Guidi <giacomo@gandalf.sssup.it> |
||
| 13 | |||
| 14 | This is the first version of BTTV driver under shark. |
||
| 15 | It's a strongly hacked driver for all the frame grabbers |
||
| 16 | with bt848/878 actually supported by linux... I cannot |
||
| 17 | assure that every frame grabber card (with bt848) could work |
||
| 18 | without problems. The audio sub-device is not supported. |
||
| 19 | |||
| 20 | New things (related with PXC driver): |
||
| 21 | |||
| 22 | - No more DOS external init |
||
| 23 | |||
| 24 | - Color grabbing (bpp 8,16,24) |
||
| 25 | |||
| 26 | - Changing resolution and grabbing period (periodic hard task... see fg.c) |
||
| 27 | |||
| 28 | - BTTV linux-like driver interface (bttv_open, bttv_ioctl, ecc) |
||
| 29 | |||
| 30 | For a fast use of this driver (GREY8 default mode): |
||
| 31 | |||
| 32 | makefile symbol: __BTTV__ |
||
| 33 | |||
| 34 | #include <drivers/fg.h> |
||
| 35 | |||
| 36 | FG_init(<grabbing period>,<grabbing wcet>,<grabbing width>,<grabbing height>); //Initialize FG |
||
| 37 | |||
| 38 | fgptr = FG_getbuffer(); //Get the image pointer |
||
| 39 | |||
| 40 | Now fgptr is a pointer to the grabbed image (GREY8 type, to change it look at fg.c); |
||
| 41 | |||
| 42 | It's implemented a Double Buffer policy, so FG_getbuffer must |
||
| 43 | be called before any access to the grabbed image. |
||
| 44 | |||
| 45 | FG_close(); //Close the FG |
||
| 46 |