diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
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committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/media/video/pwc/pwc-misc.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/media/video/pwc/pwc-misc.c')
-rw-r--r-- | drivers/media/video/pwc/pwc-misc.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/media/video/pwc/pwc-misc.c b/drivers/media/video/pwc/pwc-misc.c new file mode 100644 index 00000000000..0b031336eab --- /dev/null +++ b/drivers/media/video/pwc/pwc-misc.c | |||
@@ -0,0 +1,129 @@ | |||
1 | /* Linux driver for Philips webcam | ||
2 | Various miscellaneous functions and tables. | ||
3 | (C) 1999-2003 Nemosoft Unv. | ||
4 | (C) 2004-2006 Luc Saillard (luc@saillard.org) | ||
5 | |||
6 | NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx | ||
7 | driver and thus may have bugs that are not present in the original version. | ||
8 | Please send bug reports and support requests to <luc@saillard.org>. | ||
9 | The decompression routines have been implemented by reverse-engineering the | ||
10 | Nemosoft binary pwcx module. Caveat emptor. | ||
11 | |||
12 | This program is free software; you can redistribute it and/or modify | ||
13 | it under the terms of the GNU General Public License as published by | ||
14 | the Free Software Foundation; either version 2 of the License, or | ||
15 | (at your option) any later version. | ||
16 | |||
17 | This program is distributed in the hope that it will be useful, | ||
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
20 | GNU General Public License for more details. | ||
21 | |||
22 | You should have received a copy of the GNU General Public License | ||
23 | along with this program; if not, write to the Free Software | ||
24 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
25 | */ | ||
26 | |||
27 | |||
28 | #include "pwc.h" | ||
29 | |||
30 | const struct pwc_coord pwc_image_sizes[PSZ_MAX] = | ||
31 | { | ||
32 | { 128, 96, 0 }, /* sqcif */ | ||
33 | { 160, 120, 0 }, /* qsif */ | ||
34 | { 176, 144, 0 }, /* qcif */ | ||
35 | { 320, 240, 0 }, /* sif */ | ||
36 | { 352, 288, 0 }, /* cif */ | ||
37 | { 640, 480, 0 }, /* vga */ | ||
38 | }; | ||
39 | |||
40 | /* x,y -> PSZ_ */ | ||
41 | int pwc_decode_size(struct pwc_device *pdev, int width, int height) | ||
42 | { | ||
43 | int i, find; | ||
44 | |||
45 | /* Make sure we don't go beyond our max size. | ||
46 | NB: we have different limits for RAW and normal modes. In case | ||
47 | you don't have the decompressor loaded or use RAW mode, | ||
48 | the maximum viewable size is smaller. | ||
49 | */ | ||
50 | if (pdev->pixfmt != V4L2_PIX_FMT_YUV420) | ||
51 | { | ||
52 | if (width > pdev->abs_max.x || height > pdev->abs_max.y) | ||
53 | { | ||
54 | PWC_DEBUG_SIZE("VIDEO_PALETTE_RAW: going beyond abs_max.\n"); | ||
55 | return -1; | ||
56 | } | ||
57 | } | ||
58 | else | ||
59 | { | ||
60 | if (width > pdev->view_max.x || height > pdev->view_max.y) | ||
61 | { | ||
62 | PWC_DEBUG_SIZE("VIDEO_PALETTE_not RAW: going beyond view_max.\n"); | ||
63 | return -1; | ||
64 | } | ||
65 | } | ||
66 | |||
67 | /* Find the largest size supported by the camera that fits into the | ||
68 | requested size. | ||
69 | */ | ||
70 | find = -1; | ||
71 | for (i = 0; i < PSZ_MAX; i++) { | ||
72 | if (pdev->image_mask & (1 << i)) { | ||
73 | if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height) | ||
74 | find = i; | ||
75 | } | ||
76 | } | ||
77 | return find; | ||
78 | } | ||
79 | |||
80 | /* initialize variables depending on type and decompressor*/ | ||
81 | void pwc_construct(struct pwc_device *pdev) | ||
82 | { | ||
83 | if (DEVICE_USE_CODEC1(pdev->type)) { | ||
84 | |||
85 | pdev->view_min.x = 128; | ||
86 | pdev->view_min.y = 96; | ||
87 | pdev->view_max.x = 352; | ||
88 | pdev->view_max.y = 288; | ||
89 | pdev->abs_max.x = 352; | ||
90 | pdev->abs_max.y = 288; | ||
91 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF; | ||
92 | pdev->vcinterface = 2; | ||
93 | pdev->vendpoint = 4; | ||
94 | pdev->frame_header_size = 0; | ||
95 | pdev->frame_trailer_size = 0; | ||
96 | |||
97 | } else if (DEVICE_USE_CODEC3(pdev->type)) { | ||
98 | |||
99 | pdev->view_min.x = 160; | ||
100 | pdev->view_min.y = 120; | ||
101 | pdev->view_max.x = 640; | ||
102 | pdev->view_max.y = 480; | ||
103 | pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA; | ||
104 | pdev->abs_max.x = 640; | ||
105 | pdev->abs_max.y = 480; | ||
106 | pdev->vcinterface = 3; | ||
107 | pdev->vendpoint = 5; | ||
108 | pdev->frame_header_size = TOUCAM_HEADER_SIZE; | ||
109 | pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE; | ||
110 | |||
111 | } else /* if (DEVICE_USE_CODEC2(pdev->type)) */ { | ||
112 | |||
113 | pdev->view_min.x = 128; | ||
114 | pdev->view_min.y = 96; | ||
115 | /* Anthill bug #38: PWC always reports max size, even without PWCX */ | ||
116 | pdev->view_max.x = 640; | ||
117 | pdev->view_max.y = 480; | ||
118 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA; | ||
119 | pdev->abs_max.x = 640; | ||
120 | pdev->abs_max.y = 480; | ||
121 | pdev->vcinterface = 3; | ||
122 | pdev->vendpoint = 4; | ||
123 | pdev->frame_header_size = 0; | ||
124 | pdev->frame_trailer_size = 0; | ||
125 | } | ||
126 | pdev->pixfmt = V4L2_PIX_FMT_YUV420; /* default */ | ||
127 | pdev->view_min.size = pdev->view_min.x * pdev->view_min.y; | ||
128 | pdev->view_max.size = pdev->view_max.x * pdev->view_max.y; | ||
129 | } | ||