/* 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;
}
}
