[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / video / pwc / pwc-misc.c

/* 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 struct pwc_coord pwc_image_sizes[PSZ_MAX] =
{
	{ 128,  96, 0 }, /* sqcif */
	{ 160, 120, 0 }, /* qsif */
	{ 176, 144, 0 }, /* qcif */
	{ 320, 240, 0 }, /* sif */
	{ 352, 288, 0 }, /* cif */
	{ 640, 480, 0 }, /* vga */
};

/* x,y -> PSZ_ */
int pwc_decode_size(struct pwc_device *pdev, int width, int height)
{
	int i, find;

	/* Make sure we don't go beyond our max size.
	   NB: we have different limits for RAW and normal modes. In case
	   you don't have the decompressor loaded or use RAW mode,
	   the maximum viewable size is smaller.
	*/
	if (pdev->pixfmt != V4L2_PIX_FMT_YUV420)
	{
		if (width > pdev->abs_max.x || height > pdev->abs_max.y)
		{
			PWC_DEBUG_SIZE("VIDEO_PALETTE_RAW: going beyond abs_max.\n");
			return -1;
		}
	}
	else
	{
		if (width > pdev->view_max.x || height > pdev->view_max.y)
		{
			PWC_DEBUG_SIZE("VIDEO_PALETTE_not RAW: going beyond view_max.\n");
			return -1;
		}
	}

	/* Find the largest size supported by the camera that fits into the
	   requested size.
	 */
	find = -1;
	for (i = 0; i < PSZ_MAX; i++) {
		if (pdev->image_mask & (1 << i)) {
			if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height)
				find = i;
		}
	}
	return find;
}

/* initialize variables depending on type and decompressor*/
void pwc_construct(struct pwc_device *pdev)
{
	if (DEVICE_USE_CODEC1(pdev->type)) {

		pdev->view_min.x = 128;
		pdev->view_min.y =  96;
		pdev->view_max.x = 352;
		pdev->view_max.y = 288;
		pdev->abs_max.x  = 352;
		pdev->abs_max.y  = 288;
		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->view_min.x = 160;
		pdev->view_min.y = 120;
		pdev->view_max.x = 640;
		pdev->view_max.y = 480;
		pdev->image_mask = 1 << PSZ_QSIF | 1 << PSZ_SIF | 1 << PSZ_VGA;
		pdev->abs_max.x = 640;
		pdev->abs_max.y = 480;
		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->view_min.x = 128;
		pdev->view_min.y =  96;
		/* Anthill bug #38: PWC always reports max size, even without PWCX */
		pdev->view_max.x = 640;
		pdev->view_max.y = 480;
		pdev->image_mask = 1 << PSZ_SQCIF | 1 << PSZ_QSIF | 1 << PSZ_QCIF | 1 << PSZ_SIF | 1 << PSZ_CIF | 1 << PSZ_VGA;
		pdev->abs_max.x = 640;
		pdev->abs_max.y = 480;
		pdev->vcinterface = 3;
		pdev->vendpoint = 4;
		pdev->frame_header_size = 0;
		pdev->frame_trailer_size = 0;
	}
	pdev->pixfmt = V4L2_PIX_FMT_YUV420; /* default */
	pdev->view_min.size = pdev->view_min.x * pdev->view_min.y;
	pdev->view_max.size = pdev->view_max.x * pdev->view_max.y;
	/* length of image, in YUV format; always allocate enough memory. */
	pdev->len_per_image = PAGE_ALIGN((pdev->abs_max.x * pdev->abs_max.y * 3) / 2);
}
Commit	Line	Data
d56410e0	1	/* Linux driver for Philips webcam
1da177e4 LT	2	Various miscellaneous functions and tables.
1da177e4 LT	3	(C) 1999-2003 Nemosoft Unv.
2b455db6	4	(C) 2004-2006 Luc Saillard (luc@saillard.org)
1da177e4 LT	5
	6	NOTE: this version of pwc is an unofficial (modified) release of pwc & pcwx
	7	driver and thus may have bugs that are not present in the original version.
	8	Please send bug reports and support requests to <luc@saillard.org>.
	9	The decompression routines have been implemented by reverse-engineering the
	10	Nemosoft binary pwcx module. Caveat emptor.
	11
	12	This program is free software; you can redistribute it and/or modify
	13	it under the terms of the GNU General Public License as published by
	14	the Free Software Foundation; either version 2 of the License, or
	15	(at your option) any later version.
	16
	17	This program is distributed in the hope that it will be useful,
	18	but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	GNU General Public License for more details.
	21
	22	You should have received a copy of the GNU General Public License
	23	along with this program; if not, write to the Free Software
	24	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	25	*/
	26
1da177e4 LT	27
	28	#include "pwc.h"
	29
2b455db6	30	const struct pwc_coord pwc_image_sizes[PSZ_MAX] =
1da177e4	31	{
2b455db6 LS	32	{ 128, 96, 0 }, /* sqcif */
	33	{ 160, 120, 0 }, /* qsif */
	34	{ 176, 144, 0 }, /* qcif */
	35	{ 320, 240, 0 }, /* sif */
	36	{ 352, 288, 0 }, /* cif */
	37	{ 640, 480, 0 }, /* vga */
1da177e4 LT	38	};
	39
	40	/* x,y -> PSZ_ */
	41	int pwc_decode_size(struct pwc_device *pdev, int width, int height)
	42	{
	43	int i, find;
	44
	45	/* Make sure we don't go beyond our max size.
d56410e0 MCC	46	NB: we have different limits for RAW and normal modes. In case
	47	you don't have the decompressor loaded or use RAW mode,
	48	the maximum viewable size is smaller.
	49	*/
479567ce	50	if (pdev->pixfmt != V4L2_PIX_FMT_YUV420)
1da177e4 LT	51	{
	52	if (width > pdev->abs_max.x \|\| height > pdev->abs_max.y)
	53	{
2b455db6	54	PWC_DEBUG_SIZE("VIDEO_PALETTE_RAW: going beyond abs_max.\n");
d56410e0 MCC	55	return -1;
d56410e0 MCC	56	}
1da177e4 LT	57	}
	58	else
	59	{
	60	if (width > pdev->view_max.x \|\| height > pdev->view_max.y)
	61	{
2b455db6	62	PWC_DEBUG_SIZE("VIDEO_PALETTE_not RAW: going beyond view_max.\n");
1da177e4 LT	63	return -1;
	64	}
	65	}
	66
	67	/* Find the largest size supported by the camera that fits into the
	68	requested size.
	69	*/
	70	find = -1;
	71	for (i = 0; i < PSZ_MAX; i++) {
	72	if (pdev->image_mask & (1 << i)) {
	73	if (pwc_image_sizes[i].x <= width && pwc_image_sizes[i].y <= height)
	74	find = i;
	75	}
	76	}
	77	return find;
	78	}
	79
	80	/* initialize variables depending on type and decompressor*/
	81	void pwc_construct(struct pwc_device *pdev)
	82	{
2b455db6 LS	83	if (DEVICE_USE_CODEC1(pdev->type)) {
2b455db6 LS	84
1da177e4 LT	85	pdev->view_min.x = 128;
	86	pdev->view_min.y = 96;
	87	pdev->view_max.x = 352;
	88	pdev->view_max.y = 288;
d56410e0 MCC	89	pdev->abs_max.x = 352;
d56410e0 MCC	90	pdev->abs_max.y = 288;
1da177e4 LT	91	pdev->image_mask = 1 << PSZ_SQCIF \| 1 << PSZ_QCIF \| 1 << PSZ_CIF;
	92	pdev->vcinterface = 2;
	93	pdev->vendpoint = 4;
	94	pdev->frame_header_size = 0;
	95	pdev->frame_trailer_size = 0;
2b455db6 LS	96
	97	} else if (DEVICE_USE_CODEC3(pdev->type)) {
	98
	99	pdev->view_min.x = 160;
	100	pdev->view_min.y = 120;
	101	pdev->view_max.x = 640;
	102	pdev->view_max.y = 480;
	103	pdev->image_mask = 1 << PSZ_QSIF \| 1 << PSZ_SIF \| 1 << PSZ_VGA;
	104	pdev->abs_max.x = 640;
	105	pdev->abs_max.y = 480;
	106	pdev->vcinterface = 3;
	107	pdev->vendpoint = 5;
	108	pdev->frame_header_size = TOUCAM_HEADER_SIZE;
	109	pdev->frame_trailer_size = TOUCAM_TRAILER_SIZE;
	110
	111	} else /* if (DEVICE_USE_CODEC2(pdev->type)) */ {
	112
1da177e4 LT	113	pdev->view_min.x = 128;
	114	pdev->view_min.y = 96;
	115	/* Anthill bug #38: PWC always reports max size, even without PWCX */
	116	pdev->view_max.x = 640;
	117	pdev->view_max.y = 480;
	118	pdev->image_mask = 1 << PSZ_SQCIF \| 1 << PSZ_QSIF \| 1 << PSZ_QCIF \| 1 << PSZ_SIF \| 1 << PSZ_CIF \| 1 << PSZ_VGA;
d56410e0 MCC	119	pdev->abs_max.x = 640;
d56410e0 MCC	120	pdev->abs_max.y = 480;
1da177e4 LT	121	pdev->vcinterface = 3;
	122	pdev->vendpoint = 4;
	123	pdev->frame_header_size = 0;
	124	pdev->frame_trailer_size = 0;
1da177e4	125	}
479567ce	126	pdev->pixfmt = V4L2_PIX_FMT_YUV420; /* default */
1da177e4 LT	127	pdev->view_min.size = pdev->view_min.x * pdev->view_min.y;
	128	pdev->view_max.size = pdev->view_max.x * pdev->view_max.y;
	129	/* length of image, in YUV format; always allocate enough memory. */
2b455db6	130	pdev->len_per_image = PAGE_ALIGN((pdev->abs_max.x * pdev->abs_max.y * 3) / 2);
1da177e4 LT	131	}
	132
	133