Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 1 | /* Linux driver for Philips webcam |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | Various miscellaneous functions and tables. |
| 3 | (C) 1999-2003 Nemosoft Unv. |
| 4 | (C) 2004 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 | #include <linux/slab.h> |
| 28 | |
| 29 | #include "pwc.h" |
| 30 | |
| 31 | struct pwc_coord pwc_image_sizes[PSZ_MAX] = |
| 32 | { |
| 33 | { 128, 96, 0 }, |
| 34 | { 160, 120, 0 }, |
| 35 | { 176, 144, 0 }, |
| 36 | { 320, 240, 0 }, |
| 37 | { 352, 288, 0 }, |
| 38 | { 640, 480, 0 }, |
| 39 | }; |
| 40 | |
| 41 | /* x,y -> PSZ_ */ |
| 42 | int pwc_decode_size(struct pwc_device *pdev, int width, int height) |
| 43 | { |
| 44 | int i, find; |
| 45 | |
| 46 | /* Make sure we don't go beyond our max size. |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 47 | NB: we have different limits for RAW and normal modes. In case |
| 48 | you don't have the decompressor loaded or use RAW mode, |
| 49 | the maximum viewable size is smaller. |
| 50 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | if (pdev->vpalette == VIDEO_PALETTE_RAW) |
| 52 | { |
| 53 | if (width > pdev->abs_max.x || height > pdev->abs_max.y) |
| 54 | { |
| 55 | Debug("VIDEO_PALETTE_RAW: going beyond abs_max.\n"); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 56 | return -1; |
| 57 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | } |
| 59 | else |
| 60 | { |
| 61 | if (width > pdev->view_max.x || height > pdev->view_max.y) |
| 62 | { |
| 63 | Debug("VIDEO_PALETTE_ not RAW: going beyond view_max.\n"); |
| 64 | return -1; |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | /* Find the largest size supported by the camera that fits into the |
| 69 | requested size. |
| 70 | */ |
| 71 | find = -1; |
| 72 | for (i = 0; i < PSZ_MAX; i++) { |
| 73 | if (pdev->image_mask & (1 << i)) { |
| 74 | if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height) |
| 75 | find = i; |
| 76 | } |
| 77 | } |
| 78 | return find; |
| 79 | } |
| 80 | |
| 81 | /* initialize variables depending on type and decompressor*/ |
| 82 | void pwc_construct(struct pwc_device *pdev) |
| 83 | { |
| 84 | switch(pdev->type) { |
| 85 | case 645: |
| 86 | case 646: |
| 87 | pdev->view_min.x = 128; |
| 88 | pdev->view_min.y = 96; |
| 89 | pdev->view_max.x = 352; |
| 90 | pdev->view_max.y = 288; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 91 | pdev->abs_max.x = 352; |
| 92 | pdev->abs_max.y = 288; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF; |
| 94 | pdev->vcinterface = 2; |
| 95 | pdev->vendpoint = 4; |
| 96 | pdev->frame_header_size = 0; |
| 97 | pdev->frame_trailer_size = 0; |
| 98 | break; |
| 99 | case 675: |
| 100 | case 680: |
| 101 | case 690: |
| 102 | pdev->view_min.x = 128; |
| 103 | pdev->view_min.y = 96; |
| 104 | /* Anthill bug #38: PWC always reports max size, even without PWCX */ |
| 105 | pdev->view_max.x = 640; |
| 106 | pdev->view_max.y = 480; |
| 107 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 108 | pdev->abs_max.x = 640; |
| 109 | pdev->abs_max.y = 480; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | pdev->vcinterface = 3; |
| 111 | pdev->vendpoint = 4; |
| 112 | pdev->frame_header_size = 0; |
| 113 | pdev->frame_trailer_size = 0; |
| 114 | break; |
| 115 | case 720: |
| 116 | case 730: |
| 117 | case 740: |
| 118 | case 750: |
| 119 | pdev->view_min.x = 160; |
| 120 | pdev->view_min.y = 120; |
| 121 | pdev->view_max.x = 640; |
| 122 | pdev->view_max.y = 480; |
| 123 | pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame^] | 124 | pdev->abs_max.x = 640; |
| 125 | pdev->abs_max.y = 480; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | pdev->vcinterface = 3; |
| 127 | pdev->vendpoint = 5; |
| 128 | pdev->frame_header_size = TOUCAM_HEADER_SIZE; |
| 129 | pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE; |
| 130 | break; |
| 131 | } |
| 132 | Debug("type = %d\n",pdev->type); |
| 133 | pdev->vpalette = VIDEO_PALETTE_YUV420P; /* default */ |
| 134 | pdev->view_min.size = pdev->view_min.x * pdev->view_min.y; |
| 135 | pdev->view_max.size = pdev->view_max.x * pdev->view_max.y; |
| 136 | /* length of image, in YUV format; always allocate enough memory. */ |
| 137 | pdev->len_per_image = (pdev->abs_max.x * pdev->abs_max.y * 3) / 2; |
| 138 | } |
| 139 | |
| 140 | |