| Start/ | End/ | |||
| True | False | - | Line | Source |
| 1 | /* Linux driver for Philips webcam | |||
| 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_ */ | |||
| 0 | 0 | - | 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. | |||
| 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 | */ | |||
| 0 | 0 | - | 51 | if (pdev->vpalette == VIDEO_PALETTE_RAW) |
| 52 | { | |||
| 0 | 0 | - | 53 | if (width > pdev->abs_max.x || height > pdev->abs_max.y) |
| 0 | - | 53 | T || _ | |
| 0 | - | 53 | F || T | |
| 0 | - | 53 | F || F | |
| 54 | { | |||
| 55 | Debug("VIDEO_PALETTE_RAW: going beyond abs_max.\n"); | |||
| 0 | - | 56 | return -1; | |
| 57 | } | |||
| 58 | } | |||
| 59 | else | |||
| 60 | { | |||
| 0 | 0 | - | 61 | if (width > pdev->view_max.x || height > pdev->view_max.y) |
| 0 | - | 61 | T || _ | |
| 0 | - | 61 | F || T | |
| 0 | - | 61 | F || F | |
| 62 | { | |||
| 63 | Debug("VIDEO_PALETTE_ not RAW: going beyond view_max.\n"); | |||
| 0 | - | 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; | |||
| 0 | 0 | - | 72 | for (i = 0; i < PSZ_MAX; i++) { |
| 0 | 0 | - | 73 | if (pdev->image_mask & (1 << i)) { |
| 0 | 0 | - | 74 | if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height) |
| 0 | - | 74 | T && T | |
| 0 | - | 74 | T && F | |
| 0 | - | 74 | F && _ | |
| 75 | find = i; | |||
| 76 | } | |||
| 77 | } | |||
| 0 | - | 78 | return find; | |
| 79 | } | |||
| 80 | ||||
| 81 | /* initialize variables depending on type and decompressor*/ | |||
| 0 | 0 | - | 82 | void pwc_construct(struct pwc_device *pdev) |
| 83 | { | |||
| 84 | switch(pdev->type) { | |||
| 0 | - | 85 | case 645: | |
| 0 | - | 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; | |||
| 91 | pdev->abs_max.x = 352; | |||
| 92 | pdev->abs_max.y = 288; | |||
| 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; | |||
| 0 | - | 98 | break; | |
| 0 | - | 99 | case 675: | |
| 0 | - | 100 | case 680: | |
| 0 | - | 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; | |||
| 108 | pdev->abs_max.x = 640; | |||
| 109 | pdev->abs_max.y = 480; | |||
| 110 | pdev->vcinterface = 3; | |||
| 111 | pdev->vendpoint = 4; | |||
| 112 | pdev->frame_header_size = 0; | |||
| 113 | pdev->frame_trailer_size = 0; | |||
| 0 | - | 114 | break; | |
| 0 | - | 115 | case 720: | |
| 0 | - | 116 | case 730: | |
| 0 | - | 117 | case 740: | |
| 0 | - | 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; | |||
| 124 | pdev->abs_max.x = 640; | |||
| 125 | pdev->abs_max.y = 480; | |||
| 126 | pdev->vcinterface = 3; | |||
| 127 | pdev->vendpoint = 5; | |||
| 128 | pdev->frame_header_size = TOUCAM_HEADER_SIZE; | |||
| 129 | pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE; | |||
| 0 | - | 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 | ||||
| ***TER 0% (0/38) of SOURCE FILE pwc-misc.c | ||||