Rev 178 | Details | Compare with Previous | Last modification | View Log | RSS feed
| 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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| 177 | giacomo | 9 | #include <drivers/fg.h> |
| 170 | giacomo | 10 | #include <kernel/kern.h> |
| 173 | giacomo | 11 | #include <unistd.h> |
| 170 | giacomo | 12 | |
| 13 | extern void bttv_start(struct bttv *btv); |
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| 14 | extern int bttv_ioctl(struct bttv *btv, unsigned int cmg, void *arg); |
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| 15 | extern void bttv_close(struct bttv *btv); |
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| 16 | |||
| 17 | extern unsigned int gbufsize; |
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| 18 | |||
| 19 | static struct bttv btv; |
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| 20 | static struct video_mmap vmm; |
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| 173 | giacomo | 21 | static void * fbuf_pointer; |
| 170 | giacomo | 22 | |
| 177 | giacomo | 23 | PID refresh_PID; |
| 24 | HARD_TASK_MODEL ht_refresh; |
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| 25 | |||
| 173 | giacomo | 26 | static void (*elaborate_frame_hook)(void * ptrframe); |
| 27 | |||
| 28 | void dummy_elaborate_frame(void * ptrframe) |
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| 29 | { |
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| 30 | } |
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| 31 | |||
| 170 | giacomo | 32 | TASK FG_refresh(void) |
| 33 | { |
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| 34 | |||
| 35 | while(1) { |
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| 36 | |||
| 37 | if (vmm.frame == 0) { |
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| 38 | vmm.frame = 1; |
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| 39 | fbuf_pointer = btv.fbuffer; |
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| 177 | giacomo | 40 | *(BYTE *)fbuf_pointer = 255; |
| 41 | *(BYTE *)(fbuf_pointer+1) = 0; |
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| 170 | giacomo | 42 | } else { |
| 43 | vmm.frame = 0; |
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| 44 | fbuf_pointer = btv.fbuffer+gbufsize; |
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| 177 | giacomo | 45 | *(BYTE *)fbuf_pointer = 0; |
| 46 | *(BYTE *)(fbuf_pointer+1) = 255; |
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| 170 | giacomo | 47 | } |
| 48 | |||
| 49 | bttv_ioctl(&btv, VIDIOCMCAPTURE, &vmm); |
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| 173 | giacomo | 50 | |
| 51 | elaborate_frame_hook(fbuf_pointer); |
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| 52 | |||
| 170 | giacomo | 53 | task_endcycle(); |
| 54 | |||
| 55 | } |
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| 56 | |||
| 57 | } |
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| 58 | |||
| 177 | giacomo | 59 | int FG_init(unsigned int period, unsigned int wcet, unsigned int width, unsigned int height, unsigned int color) { |
| 170 | giacomo | 60 | |
| 61 | struct video_window vw; |
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| 62 | struct video_picture p; |
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| 63 | struct video_channel ch; |
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| 64 | |||
| 65 | hard_task_default_model(ht_refresh); |
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| 66 | hard_task_def_wcet(ht_refresh, wcet); |
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| 67 | hard_task_def_mit(ht_refresh, period); |
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| 68 | hard_task_def_ctrl_jet(ht_refresh); |
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| 69 | |||
| 70 | refresh_PID = task_create("FG_refresh", FG_refresh, &ht_refresh, NULL); |
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| 71 | if (refresh_PID == -1) { |
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| 72 | sys_end(); |
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| 73 | } |
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| 179 | giacomo | 74 | |
| 170 | giacomo | 75 | bttv_start(&btv); |
| 76 | |||
| 77 | bttv_ioctl(&btv, VIDIOCGWIN, &vw); |
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| 78 | vw.x = 0; |
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| 79 | vw.y = 0; |
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| 80 | vw.width = width; |
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| 81 | vw.height = height; |
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| 82 | bttv_ioctl(&btv, VIDIOCSWIN, &vw); |
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| 83 | |||
| 84 | bttv_ioctl(&btv, VIDIOCGPICT, &p); |
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| 177 | giacomo | 85 | if (color == FG_RGB24) { |
| 86 | p.palette = VIDEO_PALETTE_RGB24; |
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| 87 | p.depth = 24; |
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| 88 | } |
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| 89 | if (color == FG_MONO) { |
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| 90 | p.palette = VIDEO_PALETTE_GREY; |
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| 91 | p.depth = 8; |
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| 92 | } |
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| 170 | giacomo | 93 | bttv_ioctl(&btv, VIDIOCSPICT, &p); |
| 94 | |||
| 95 | bttv_ioctl(&btv, VIDIOCGCHAN, &ch); |
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| 96 | ch.channel = 0; |
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| 97 | ch.norm = 3; |
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| 98 | bttv_ioctl(&btv, VIDIOCSCHAN, &ch); |
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| 99 | |||
| 100 | vmm.frame = 0; |
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| 101 | vmm.height = vw.height; |
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| 102 | vmm.width = vw.width; |
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| 103 | vmm.format = p.palette; |
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| 104 | bttv_ioctl(&btv, VIDIOCMCAPTURE, &vmm); |
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| 173 | giacomo | 105 | |
| 106 | elaborate_frame_hook = dummy_elaborate_frame; |
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| 170 | giacomo | 107 | |
| 173 | giacomo | 108 | sleep(1); |
| 109 | |||
| 170 | giacomo | 110 | return 0; |
| 111 | |||
| 112 | } |
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| 113 | |||
| 177 | giacomo | 114 | void FG_start_grabbing(void) |
| 115 | { |
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| 116 | |||
| 117 | task_activate(refresh_PID); |
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| 179 | giacomo | 118 | |
| 177 | giacomo | 119 | } |
| 120 | |||
| 178 | giacomo | 121 | void FG_close(void) |
| 177 | giacomo | 122 | { |
| 123 | |||
| 170 | giacomo | 124 | bttv_close(&btv); |
| 125 | |||
| 126 | } |
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| 127 | |||
| 128 | void * FG_getbuffer(void) |
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| 129 | { |
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| 130 | |||
| 131 | return fbuf_pointer; |
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| 132 | |||
| 133 | } |
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| 134 | |||
| 173 | giacomo | 135 | void FG_set_hook(void * funptr) |
| 136 | { |
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| 137 | |||
| 138 | elaborate_frame_hook = (void *)funptr; |
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| 139 | |||
| 140 | } |