1 /* Linux driver for Philips webcam
2 Various miscellaneous functions and tables.
3 (C) 1999-2003 Nemosoft Unv. (webcam@smcc.demon.nl)
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/slab.h>
24 struct pwc_coord pwc_image_sizes[PSZ_MAX] =
35 int pwc_decode_size(struct pwc_device *pdev, int width, int height)
39 /* Make sure we don't go beyond our max size.
40 NB: we have different limits for RAW and normal modes. In case
41 you don't have the decompressor loaded or use RAW mode,
42 the maximum viewable size is smaller.
44 if (pdev->vpalette == VIDEO_PALETTE_RAW)
46 if (width > pdev->abs_max.x || height > pdev->abs_max.y)
48 Debug("VIDEO_PALETTE_RAW: going beyond abs_max.\n");
54 if (width > pdev->view_max.x || height > pdev->view_max.y)
56 Debug("VIDEO_PALETTE_ not RAW: going beyond view_max.\n");
61 /* Find the largest size supported by the camera that fits into the
65 for (i = 0; i < PSZ_MAX; i++) {
66 if (pdev->image_mask & (1 << i)) {
67 if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height)
74 /* initialize variables depending on type and decompressor*/
75 void pwc_construct(struct pwc_device *pdev)
80 pdev->view_min.x = 128;
81 pdev->view_min.y = 96;
82 pdev->view_max.x = 352;
83 pdev->view_max.y = 288;
84 pdev->abs_max.x = 352;
85 pdev->abs_max.y = 288;
86 pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF;
87 pdev->vcinterface = 2;
89 pdev->frame_header_size = 0;
90 pdev->frame_trailer_size = 0;
95 pdev->view_min.x = 128;
96 pdev->view_min.y = 96;
97 /* Anthill bug #38: PWC always reports max size, even without PWCX */
98 if (pdev->decompressor != NULL) {
99 pdev->view_max.x = 640;
100 pdev->view_max.y = 480;
103 pdev->view_max.x = 352;
104 pdev->view_max.y = 288;
106 pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA;
107 pdev->abs_max.x = 640;
108 pdev->abs_max.y = 480;
109 pdev->vcinterface = 3;
111 pdev->frame_header_size = 0;
112 pdev->frame_trailer_size = 0;
118 pdev->view_min.x = 160;
119 pdev->view_min.y = 120;
120 /* Anthill bug #38: PWC always reports max size, even without PWCX */
121 if (pdev->decompressor != NULL) {
122 pdev->view_max.x = 640;
123 pdev->view_max.y = 480;
126 /* We use CIF, not SIF since some tools really need CIF. So we cheat a bit. */
127 pdev->view_max.x = 352;
128 pdev->view_max.y = 288;
130 pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA;
131 pdev->abs_max.x = 640;
132 pdev->abs_max.y = 480;
133 pdev->vcinterface = 3;
135 pdev->frame_header_size = TOUCAM_HEADER_SIZE;
136 pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE;
139 pdev->vpalette = VIDEO_PALETTE_YUV420P; /* default */
140 pdev->view_min.size = pdev->view_min.x * pdev->view_min.y;
141 pdev->view_max.size = pdev->view_max.x * pdev->view_max.y;
142 /* length of image, in YUV format; always allocate enough memory. */
143 pdev->len_per_image = (pdev->abs_max.x * pdev->abs_max.y * 3) / 2;