Rev 846 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 846 | giacomo | 1 | /* Linux driver for Philips webcam |
| 2 | Various miscellaneous functions and tables. |
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| 3 | (C) 1999-2003 Nemosoft Unv. (webcam@smcc.demon.nl) |
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| 4 | |||
| 5 | This program is free software; you can redistribute it and/or modify |
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| 6 | it under the terms of the GNU General Public License as published by |
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| 7 | the Free Software Foundation; either version 2 of the License, or |
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| 8 | (at your option) any later version. |
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| 9 | |||
| 10 | This program is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 13 | GNU General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program; if not, write to the Free Software |
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| 17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 18 | */ |
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| 19 | |||
| 20 | #include <linux/slab.h> |
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| 21 | |||
| 22 | #include "pwc.h" |
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| 23 | |||
| 24 | struct pwc_coord pwc_image_sizes[PSZ_MAX] = |
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| 25 | { |
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| 26 | { 128, 96, 0 }, |
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| 27 | { 160, 120, 0 }, |
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| 28 | { 176, 144, 0 }, |
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| 29 | { 320, 240, 0 }, |
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| 30 | { 352, 288, 0 }, |
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| 31 | { 640, 480, 0 }, |
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| 32 | }; |
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| 33 | |||
| 34 | /* x,y -> PSZ_ */ |
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| 35 | int pwc_decode_size(struct pwc_device *pdev, int width, int height) |
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| 36 | { |
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| 37 | int i, find; |
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| 38 | |||
| 39 | /* Make sure we don't go beyond our max size */ |
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| 40 | if (width > pdev->view_max.x || height > pdev->view_max.y) |
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| 41 | return -1; |
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| 42 | /* Find the largest size supported by the camera that fits into the |
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| 43 | requested size. |
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| 44 | */ |
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| 45 | find = -1; |
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| 46 | for (i = 0; i < PSZ_MAX; i++) { |
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| 47 | if (pdev->image_mask & (1 << i)) { |
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| 48 | if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height) |
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| 49 | find = i; |
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| 50 | } |
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| 51 | } |
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| 52 | return find; |
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| 53 | } |
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| 54 | |||
| 55 | /* initialize variables depending on type and decompressor*/ |
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| 56 | void pwc_construct(struct pwc_device *pdev) |
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| 57 | { |
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| 58 | switch(pdev->type) { |
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| 59 | case 645: |
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| 60 | case 646: |
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| 61 | pdev->view_min.x = 128; |
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| 62 | pdev->view_min.y = 96; |
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| 63 | pdev->view_max.x = 352; |
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| 64 | pdev->view_max.y = 288; |
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| 65 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF; |
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| 66 | pdev->vcinterface = 2; |
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| 67 | pdev->vendpoint = 4; |
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| 68 | pdev->frame_header_size = 0; |
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| 69 | pdev->frame_trailer_size = 0; |
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| 70 | break; |
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| 71 | case 675: |
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| 72 | case 680: |
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| 73 | case 690: |
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| 74 | pdev->view_min.x = 128; |
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| 75 | pdev->view_min.y = 96; |
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| 76 | /* Anthill bug #38: PWC always reports max size, even without PWCX */ |
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| 77 | if (pdev->decompressor != NULL) { |
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| 78 | pdev->view_max.x = 640; |
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| 79 | pdev->view_max.y = 480; |
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| 80 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA; |
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| 81 | } |
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| 82 | else { |
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| 83 | pdev->view_max.x = 352; |
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| 84 | pdev->view_max.y = 288; |
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| 85 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF; |
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| 86 | } |
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| 87 | pdev->vcinterface = 3; |
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| 88 | pdev->vendpoint = 4; |
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| 89 | pdev->frame_header_size = 0; |
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| 90 | pdev->frame_trailer_size = 0; |
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| 91 | break; |
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| 92 | case 720: |
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| 93 | case 730: |
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| 94 | case 740: |
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| 95 | case 750: |
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| 96 | pdev->view_min.x = 160; |
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| 97 | pdev->view_min.y = 120; |
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| 98 | /* Anthill bug #38: PWC always reports max size, even without PWCX */ |
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| 99 | if (pdev->decompressor != NULL) { |
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| 100 | pdev->view_max.x = 640; |
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| 101 | pdev->view_max.y = 480; |
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| 102 | pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA; |
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| 103 | } |
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| 104 | else { |
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| 105 | /* Tell CIF, even though SIF really is the maximum, but some tools really need CIF */ |
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| 106 | pdev->view_max.x = 352; |
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| 107 | pdev->view_max.y = 288; |
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| 108 | pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF; |
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| 109 | } |
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| 110 | pdev->vcinterface = 3; |
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| 111 | pdev->vendpoint = 5; |
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| 112 | pdev->frame_header_size = TOUCAM_HEADER_SIZE; |
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| 113 | pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE; |
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| 114 | break; |
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| 115 | } |
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| 116 | pdev->view_min.size = pdev->view_min.x * pdev->view_min.y; |
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| 117 | pdev->view_max.size = pdev->view_max.x * pdev->view_max.y; |
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| 118 | /* length of image, in YUV format */ |
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| 119 | pdev->len_per_image = (pdev->view_max.size * 3) / 2; |
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| 120 | } |
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| 121 | |||
| 122 |