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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 170 | giacomo | 1 | /* Fast Frame Grabber for SHARK |
| 2 | * |
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| 3 | * Giacomo Guidi |
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| 4 | * <giacomo@gandalf.sssup.it> |
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| 5 | * |
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| 6 | */ |
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| 7 | |||
| 8 | #include <drivers/bttv.h> |
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| 9 | #include <kernel/kern.h> |
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| 173 | giacomo | 10 | #include <unistd.h> |
| 170 | giacomo | 11 | |
| 12 | extern void bttv_start(struct bttv *btv); |
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| 13 | extern int bttv_ioctl(struct bttv *btv, unsigned int cmg, void *arg); |
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| 14 | extern void bttv_close(struct bttv *btv); |
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| 15 | |||
| 16 | extern unsigned int gbufsize; |
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| 17 | |||
| 18 | static struct bttv btv; |
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| 19 | static struct video_mmap vmm; |
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| 173 | giacomo | 20 | static void * fbuf_pointer; |
| 170 | giacomo | 21 | |
| 173 | giacomo | 22 | static void (*elaborate_frame_hook)(void * ptrframe); |
| 23 | |||
| 24 | void dummy_elaborate_frame(void * ptrframe) |
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| 25 | { |
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| 26 | } |
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| 27 | |||
| 170 | giacomo | 28 | TASK FG_refresh(void) |
| 29 | { |
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| 30 | |||
| 31 | while(1) { |
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| 32 | |||
| 33 | if (vmm.frame == 0) { |
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| 34 | vmm.frame = 1; |
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| 35 | fbuf_pointer = btv.fbuffer; |
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| 36 | } else { |
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| 37 | vmm.frame = 0; |
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| 38 | fbuf_pointer = btv.fbuffer+gbufsize; |
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| 39 | } |
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| 40 | |||
| 41 | bttv_ioctl(&btv, VIDIOCMCAPTURE, &vmm); |
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| 173 | giacomo | 42 | |
| 43 | elaborate_frame_hook(fbuf_pointer); |
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| 44 | |||
| 170 | giacomo | 45 | task_endcycle(); |
| 46 | |||
| 47 | } |
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| 48 | |||
| 49 | } |
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| 50 | |||
| 51 | int FG_init(unsigned int period, unsigned int wcet, unsigned int width, unsigned int height) { |
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| 52 | |||
| 53 | HARD_TASK_MODEL ht_refresh; |
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| 54 | PID refresh_PID; |
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| 55 | |||
| 56 | struct video_window vw; |
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| 57 | struct video_picture p; |
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| 58 | struct video_channel ch; |
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| 59 | |||
| 60 | hard_task_default_model(ht_refresh); |
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| 61 | hard_task_def_wcet(ht_refresh, wcet); |
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| 62 | hard_task_def_mit(ht_refresh, period); |
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| 63 | hard_task_def_ctrl_jet(ht_refresh); |
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| 64 | |||
| 65 | refresh_PID = task_create("FG_refresh", FG_refresh, &ht_refresh, NULL); |
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| 66 | if (refresh_PID == -1) { |
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| 67 | sys_end(); |
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| 68 | } |
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| 69 | |||
| 70 | bttv_start(&btv); |
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| 71 | |||
| 72 | bttv_ioctl(&btv, VIDIOCGWIN, &vw); |
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| 73 | vw.x = 0; |
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| 74 | vw.y = 0; |
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| 75 | vw.width = width; |
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| 76 | vw.height = height; |
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| 77 | bttv_ioctl(&btv, VIDIOCSWIN, &vw); |
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| 78 | |||
| 79 | bttv_ioctl(&btv, VIDIOCGPICT, &p); |
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| 80 | p.palette = VIDEO_PALETTE_GREY; //GREY mode 8 bpp |
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| 81 | p.depth = 8; |
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| 82 | bttv_ioctl(&btv, VIDIOCSPICT, &p); |
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| 83 | |||
| 84 | bttv_ioctl(&btv, VIDIOCGCHAN, &ch); |
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| 85 | ch.channel = 0; |
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| 86 | ch.norm = 3; |
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| 87 | bttv_ioctl(&btv, VIDIOCSCHAN, &ch); |
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| 88 | |||
| 89 | vmm.frame = 0; |
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| 90 | vmm.height = vw.height; |
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| 91 | vmm.width = vw.width; |
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| 92 | vmm.format = p.palette; |
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| 93 | bttv_ioctl(&btv, VIDIOCMCAPTURE, &vmm); |
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| 173 | giacomo | 94 | |
| 95 | elaborate_frame_hook = dummy_elaborate_frame; |
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| 170 | giacomo | 96 | |
| 173 | giacomo | 97 | sleep(1); |
| 98 | |||
| 170 | giacomo | 99 | task_activate(refresh_PID); |
| 100 | |||
| 101 | return 0; |
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| 102 | |||
| 103 | } |
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| 104 | |||
| 105 | void FG_close(void) |
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| 106 | { |
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| 107 | |||
| 108 | bttv_close(&btv); |
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| 109 | |||
| 110 | } |
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| 111 | |||
| 112 | void * FG_getbuffer(void) |
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| 113 | { |
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| 114 | |||
| 115 | return fbuf_pointer; |
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| 116 | |||
| 117 | } |
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| 118 | |||
| 173 | giacomo | 119 | void FG_set_hook(void * funptr) |
| 120 | { |
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| 121 | |||
| 122 | elaborate_frame_hook = (void *)funptr; |
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| 123 | |||
| 124 | } |