Commit | Line | Data |
---|---|---|
d56410e0 | 1 | /* Linux driver for Philips webcam |
1da177e4 LT |
2 | Various miscellaneous functions and tables. |
3 | (C) 1999-2003 Nemosoft Unv. | |
2b455db6 | 4 | (C) 2004-2006 Luc Saillard (luc@saillard.org) |
1da177e4 LT |
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 | ||
1da177e4 LT |
27 | |
28 | #include "pwc.h" | |
29 | ||
2b455db6 | 30 | const struct pwc_coord pwc_image_sizes[PSZ_MAX] = |
1da177e4 | 31 | { |
2b455db6 LS |
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 */ | |
1da177e4 LT |
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. | |
d56410e0 MCC |
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 | */ | |
479567ce | 50 | if (pdev->pixfmt != V4L2_PIX_FMT_YUV420) |
1da177e4 LT |
51 | { |
52 | if (width > pdev->abs_max.x || height > pdev->abs_max.y) | |
53 | { | |
2b455db6 | 54 | PWC_DEBUG_SIZE("VIDEO_PALETTE_RAW: going beyond abs_max.\n"); |
d56410e0 MCC |
55 | return -1; |
56 | } | |
1da177e4 LT |
57 | } |
58 | else | |
59 | { | |
60 | if (width > pdev->view_max.x || height > pdev->view_max.y) | |
61 | { | |
2b455db6 | 62 | PWC_DEBUG_SIZE("VIDEO_PALETTE_not RAW: going beyond view_max.\n"); |
1da177e4 LT |
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 | { | |
2b455db6 LS |
83 | if (DEVICE_USE_CODEC1(pdev->type)) { |
84 | ||
1da177e4 LT |
85 | pdev->view_min.x = 128; |
86 | pdev->view_min.y = 96; | |
87 | pdev->view_max.x = 352; | |
88 | pdev->view_max.y = 288; | |
d56410e0 MCC |
89 | pdev->abs_max.x = 352; |
90 | pdev->abs_max.y = 288; | |
1da177e4 LT |
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; | |
2b455db6 LS |
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 | ||
1da177e4 LT |
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; | |
d56410e0 MCC |
119 | pdev->abs_max.x = 640; |
120 | pdev->abs_max.y = 480; | |
1da177e4 LT |
121 | pdev->vcinterface = 3; |
122 | pdev->vendpoint = 4; | |
123 | pdev->frame_header_size = 0; | |
124 | pdev->frame_trailer_size = 0; | |
1da177e4 | 125 | } |
479567ce | 126 | pdev->pixfmt = V4L2_PIX_FMT_YUV420; /* default */ |
1da177e4 LT |
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 | /* length of image, in YUV format; always allocate enough memory. */ | |
2b455db6 | 130 | pdev->len_per_image = PAGE_ALIGN((pdev->abs_max.x * pdev->abs_max.y * 3) / 2); |
1da177e4 LT |
131 | } |
132 | ||
133 |