| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 int pwc_image_sizes[PSZ_MAX][2] = |
| 31 | { |
| 32 | { 128, 96 }, /* sqcif */ |
| 33 | { 160, 120 }, /* qsif */ |
| 34 | { 176, 144 }, /* qcif */ |
| 35 | { 320, 240 }, /* sif */ |
| 36 | { 352, 288 }, /* cif */ |
| 37 | { 640, 480 }, /* vga */ |
| 38 | }; |
| 39 | |
| 40 | /* x,y -> PSZ_ */ |
| 41 | int pwc_get_size(struct pwc_device *pdev, int width, int height) |
| 42 | { |
| 43 | int i; |
| 44 | |
| 45 | /* Find the largest size supported by the camera that fits into the |
| 46 | requested size. */ |
| 47 | for (i = PSZ_MAX - 1; i >= 0; i--) { |
| 48 | if (!(pdev->image_mask & (1 << i))) |
| 49 | continue; |
| 50 | |
| 51 | if (pwc_image_sizes[i][0] <= width && |
| 52 | pwc_image_sizes[i][1] <= height) |
| 53 | return i; |
| 54 | } |
| 55 | |
| 56 | /* No mode found, return the smallest mode we have */ |
| 57 | for (i = 0; i < PSZ_MAX; i++) { |
| 58 | if (pdev->image_mask & (1 << i)) |
| 59 | return i; |
| 60 | } |
| 61 | |
| 62 | /* Never reached there always is atleast one supported mode */ |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | /* initialize variables depending on type and decompressor */ |
| 67 | void pwc_construct(struct pwc_device *pdev) |
| 68 | { |
| 69 | if (DEVICE_USE_CODEC1(pdev->type)) { |
| 70 | |
| 71 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF; |
| 72 | pdev->vcinterface = 2; |
| 73 | pdev->vendpoint = 4; |
| 74 | pdev->frame_header_size = 0; |
| 75 | pdev->frame_trailer_size = 0; |
| 76 | |
| 77 | } else if (DEVICE_USE_CODEC3(pdev->type)) { |
| 78 | |
| 79 | pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA; |
| 80 | pdev->vcinterface = 3; |
| 81 | pdev->vendpoint = 5; |
| 82 | pdev->frame_header_size = TOUCAM_HEADER_SIZE; |
| 83 | pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE; |
| 84 | |
| 85 | } else /* if (DEVICE_USE_CODEC2(pdev->type)) */ { |
| 86 | |
| 87 | pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA; |
| 88 | pdev->vcinterface = 3; |
| 89 | pdev->vendpoint = 4; |
| 90 | pdev->frame_header_size = 0; |
| 91 | pdev->frame_trailer_size = 0; |
| 92 | } |
| 93 | } |