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81 lines
2.2 KiB
81 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* Linux driver for Philips webcam |
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Various miscellaneous functions and tables. |
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(C) 1999-2003 Nemosoft Unv. |
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(C) 2004-2006 Luc Saillard ([email protected]) |
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NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx |
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driver and thus may have bugs that are not present in the original version. |
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Please send bug reports and support requests to <[email protected]>. |
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The decompression routines have been implemented by reverse-engineering the |
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Nemosoft binary pwcx module. Caveat emptor. |
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*/ |
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#include "pwc.h" |
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const int pwc_image_sizes[PSZ_MAX][2] = |
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{ |
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{ 128, 96 }, /* sqcif */ |
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{ 160, 120 }, /* qsif */ |
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{ 176, 144 }, /* qcif */ |
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{ 320, 240 }, /* sif */ |
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{ 352, 288 }, /* cif */ |
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{ 640, 480 }, /* vga */ |
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}; |
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/* x,y -> PSZ_ */ |
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int pwc_get_size(struct pwc_device *pdev, int width, int height) |
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{ |
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int i; |
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/* Find the largest size supported by the camera that fits into the |
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requested size. */ |
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for (i = PSZ_MAX - 1; i >= 0; i--) { |
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if (!(pdev->image_mask & (1 << i))) |
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continue; |
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if (pwc_image_sizes[i][0] <= width && |
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pwc_image_sizes[i][1] <= height) |
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return i; |
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} |
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/* No mode found, return the smallest mode we have */ |
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for (i = 0; i < PSZ_MAX; i++) { |
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if (pdev->image_mask & (1 << i)) |
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return i; |
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} |
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/* Never reached there always is at least one supported mode */ |
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return 0; |
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} |
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/* initialize variables depending on type and decompressor */ |
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void pwc_construct(struct pwc_device *pdev) |
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{ |
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if (DEVICE_USE_CODEC1(pdev->type)) { |
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pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF; |
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pdev->vcinterface = 2; |
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pdev->vendpoint = 4; |
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pdev->frame_header_size = 0; |
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pdev->frame_trailer_size = 0; |
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} else if (DEVICE_USE_CODEC3(pdev->type)) { |
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pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA; |
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pdev->vcinterface = 3; |
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pdev->vendpoint = 5; |
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pdev->frame_header_size = TOUCAM_HEADER_SIZE; |
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pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE; |
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} else /* if (DEVICE_USE_CODEC2(pdev->type)) */ { |
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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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pdev->vcinterface = 3; |
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pdev->vendpoint = 4; |
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pdev->frame_header_size = 0; |
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pdev->frame_trailer_size = 0; |
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} |
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}
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