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Rev | Author | Line No. | Line |
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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 |