diff options
Diffstat (limited to 'drivers/media/usb/pwc/pwc-misc.c')
| -rw-r--r-- | drivers/media/usb/pwc/pwc-misc.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/media/usb/pwc/pwc-misc.c b/drivers/media/usb/pwc/pwc-misc.c new file mode 100644 index 000000000..9be5adffa --- /dev/null +++ b/drivers/media/usb/pwc/pwc-misc.c @@ -0,0 +1,93 @@ +/* Linux driver for Philips webcam + Various miscellaneous functions and tables. + (C) 1999-2003 Nemosoft Unv. + (C) 2004-2006 Luc Saillard (luc@saillard.org) + + NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx + driver and thus may have bugs that are not present in the original version. + Please send bug reports and support requests to <luc@saillard.org>. + The decompression routines have been implemented by reverse-engineering the + Nemosoft binary pwcx module. Caveat emptor. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + + +#include "pwc.h" + +const int pwc_image_sizes[PSZ_MAX][2] = +{ + { 128, 96 }, /* sqcif */ + { 160, 120 }, /* qsif */ + { 176, 144 }, /* qcif */ + { 320, 240 }, /* sif */ + { 352, 288 }, /* cif */ + { 640, 480 }, /* vga */ +}; + +/* x,y -> PSZ_ */ +int pwc_get_size(struct pwc_device *pdev, int width, int height) +{ + int i; + + /* Find the largest size supported by the camera that fits into the + requested size. */ + for (i = PSZ_MAX - 1; i >= 0; i--) { + if (!(pdev->image_mask & (1 << i))) + continue; + + if (pwc_image_sizes[i][0] <= width && + pwc_image_sizes[i][1] <= height) + return i; + } + + /* No mode found, return the smallest mode we have */ + for (i = 0; i < PSZ_MAX; i++) { + if (pdev->image_mask & (1 << i)) + return i; + } + + /* Never reached there always is atleast one supported mode */ + return 0; +} + +/* initialize variables depending on type and decompressor */ +void pwc_construct(struct pwc_device *pdev) +{ + if (DEVICE_USE_CODEC1(pdev->type)) { + + pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QCIF | 1 << PSZ_CIF; + pdev->vcinterface = 2; + pdev->vendpoint = 4; + pdev->frame_header_size = 0; + pdev->frame_trailer_size = 0; + + } else if (DEVICE_USE_CODEC3(pdev->type)) { + + pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA; + pdev->vcinterface = 3; + pdev->vendpoint = 5; + pdev->frame_header_size = TOUCAM_HEADER_SIZE; + pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE; + + } else /* if (DEVICE_USE_CODEC2(pdev->type)) */ { + + pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA; + pdev->vcinterface = 3; + pdev->vendpoint = 4; + pdev->frame_header_size = 0; + pdev->frame_trailer_size = 0; + } +} |