Rev 173 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 170 | giacomo | 1 | /* Fast Frame Grabber for SHARK |
| 2 | * |
||
| 3 | * Giacomo Guidi |
||
| 4 | * <giacomo@gandalf.sssup.it> |
||
| 5 | * |
||
| 6 | */ |
||
| 7 | |||
| 8 | #include <drivers/bttv.h> |
||
| 9 | #include <kernel/kern.h> |
||
| 10 | |||
| 11 | extern void bttv_start(struct bttv *btv); |
||
| 12 | extern int bttv_ioctl(struct bttv *btv, unsigned int cmg, void *arg); |
||
| 13 | extern void bttv_close(struct bttv *btv); |
||
| 14 | |||
| 15 | extern unsigned int gbufsize; |
||
| 16 | |||
| 17 | static struct bttv btv; |
||
| 18 | static struct video_mmap vmm; |
||
| 19 | void * fbuf_pointer; |
||
| 20 | |||
| 21 | TASK FG_refresh(void) |
||
| 22 | { |
||
| 23 | |||
| 24 | while(1) { |
||
| 25 | |||
| 26 | if (vmm.frame == 0) { |
||
| 27 | vmm.frame = 1; |
||
| 28 | fbuf_pointer = btv.fbuffer; |
||
| 29 | } else { |
||
| 30 | vmm.frame = 0; |
||
| 31 | fbuf_pointer = btv.fbuffer+gbufsize; |
||
| 32 | } |
||
| 33 | |||
| 34 | bttv_ioctl(&btv, VIDIOCMCAPTURE, &vmm); |
||
| 35 | |||
| 36 | task_endcycle(); |
||
| 37 | |||
| 38 | } |
||
| 39 | |||
| 40 | } |
||
| 41 | |||
| 42 | int FG_init(unsigned int period, unsigned int wcet, unsigned int width, unsigned int height) { |
||
| 43 | |||
| 44 | HARD_TASK_MODEL ht_refresh; |
||
| 45 | PID refresh_PID; |
||
| 46 | |||
| 47 | struct video_window vw; |
||
| 48 | struct video_picture p; |
||
| 49 | struct video_channel ch; |
||
| 50 | |||
| 51 | hard_task_default_model(ht_refresh); |
||
| 52 | hard_task_def_wcet(ht_refresh, wcet); |
||
| 53 | hard_task_def_mit(ht_refresh, period); |
||
| 54 | hard_task_def_ctrl_jet(ht_refresh); |
||
| 55 | |||
| 56 | refresh_PID = task_create("FG_refresh", FG_refresh, &ht_refresh, NULL); |
||
| 57 | if (refresh_PID == -1) { |
||
| 58 | sys_end(); |
||
| 59 | } |
||
| 60 | |||
| 61 | bttv_start(&btv); |
||
| 62 | |||
| 63 | bttv_ioctl(&btv, VIDIOCGWIN, &vw); |
||
| 64 | vw.x = 0; |
||
| 65 | vw.y = 0; |
||
| 66 | vw.width = width; |
||
| 67 | vw.height = height; |
||
| 68 | bttv_ioctl(&btv, VIDIOCSWIN, &vw); |
||
| 69 | |||
| 70 | bttv_ioctl(&btv, VIDIOCGPICT, &p); |
||
| 71 | p.palette = VIDEO_PALETTE_GREY; //GREY mode 8 bpp |
||
| 72 | p.depth = 8; |
||
| 73 | bttv_ioctl(&btv, VIDIOCSPICT, &p); |
||
| 74 | |||
| 75 | bttv_ioctl(&btv, VIDIOCGCHAN, &ch); |
||
| 76 | ch.channel = 0; |
||
| 77 | ch.norm = 3; |
||
| 78 | bttv_ioctl(&btv, VIDIOCSCHAN, &ch); |
||
| 79 | |||
| 80 | vmm.frame = 0; |
||
| 81 | vmm.height = vw.height; |
||
| 82 | vmm.width = vw.width; |
||
| 83 | vmm.format = p.palette; |
||
| 84 | bttv_ioctl(&btv, VIDIOCMCAPTURE, &vmm); |
||
| 85 | |||
| 86 | task_activate(refresh_PID); |
||
| 87 | |||
| 88 | return 0; |
||
| 89 | |||
| 90 | } |
||
| 91 | |||
| 92 | void FG_close(void) |
||
| 93 | { |
||
| 94 | |||
| 95 | bttv_close(&btv); |
||
| 96 | |||
| 97 | } |
||
| 98 | |||
| 99 | void * FG_getbuffer(void) |
||
| 100 | { |
||
| 101 | |||
| 102 | return fbuf_pointer; |
||
| 103 | |||
| 104 | } |
||
| 105 |