V4L/DVB (3599a): Move drivers/usb/media to drivers/media/video
Because of historic reasons, there are two separate directories with V4L stuff. Most drivers are located at driver/media/video. However, some code for USB Webcams were inserted under drivers/usb/media. This makes difficult for module authors to know were things should be. Also, makes Kconfig menu confusing for normal users. This patch moves all V4L content under drivers/usb/media to drivers/media/video, and fixes Kconfig/Makefile entries. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab
146
drivers/media/video/pwc/pwc-uncompress.c
Normal file
146
drivers/media/video/pwc/pwc-uncompress.c
Normal file
@@ -0,0 +1,146 @@
|
||||
/* Linux driver for Philips webcam
|
||||
Decompression frontend.
|
||||
(C) 1999-2003 Nemosoft Unv.
|
||||
(C) 2004 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 <asm/current.h>
|
||||
#include <asm/types.h>
|
||||
|
||||
#include "pwc.h"
|
||||
#include "pwc-uncompress.h"
|
||||
|
||||
int pwc_decompress(struct pwc_device *pdev)
|
||||
{
|
||||
struct pwc_frame_buf *fbuf;
|
||||
int n, line, col, stride;
|
||||
void *yuv, *image;
|
||||
u16 *src;
|
||||
u16 *dsty, *dstu, *dstv;
|
||||
|
||||
if (pdev == NULL)
|
||||
return -EFAULT;
|
||||
#if defined(__KERNEL__) && defined(PWC_MAGIC)
|
||||
if (pdev->magic != PWC_MAGIC) {
|
||||
Err("pwc_decompress(): magic failed.\n");
|
||||
return -EFAULT;
|
||||
}
|
||||
#endif
|
||||
|
||||
fbuf = pdev->read_frame;
|
||||
if (fbuf == NULL)
|
||||
return -EFAULT;
|
||||
image = pdev->image_ptr[pdev->fill_image];
|
||||
if (!image)
|
||||
return -EFAULT;
|
||||
|
||||
yuv = fbuf->data + pdev->frame_header_size; /* Skip header */
|
||||
|
||||
/* Raw format; that's easy... */
|
||||
if (pdev->vpalette == VIDEO_PALETTE_RAW)
|
||||
{
|
||||
memcpy(image, yuv, pdev->frame_size);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (pdev->vbandlength == 0) {
|
||||
/* Uncompressed mode. We copy the data into the output buffer,
|
||||
using the viewport size (which may be larger than the image
|
||||
size). Unfortunately we have to do a bit of byte stuffing
|
||||
to get the desired output format/size.
|
||||
*/
|
||||
/*
|
||||
* We do some byte shuffling here to go from the
|
||||
* native format to YUV420P.
|
||||
*/
|
||||
src = (u16 *)yuv;
|
||||
n = pdev->view.x * pdev->view.y;
|
||||
|
||||
/* offset in Y plane */
|
||||
stride = pdev->view.x * pdev->offset.y + pdev->offset.x;
|
||||
dsty = (u16 *)(image + stride);
|
||||
|
||||
/* offsets in U/V planes */
|
||||
stride = pdev->view.x * pdev->offset.y / 4 + pdev->offset.x / 2;
|
||||
dstu = (u16 *)(image + n + stride);
|
||||
dstv = (u16 *)(image + n + n / 4 + stride);
|
||||
|
||||
/* increment after each line */
|
||||
stride = (pdev->view.x - pdev->image.x) / 2; /* u16 is 2 bytes */
|
||||
|
||||
for (line = 0; line < pdev->image.y; line++) {
|
||||
for (col = 0; col < pdev->image.x; col += 4) {
|
||||
*dsty++ = *src++;
|
||||
*dsty++ = *src++;
|
||||
if (line & 1)
|
||||
*dstv++ = *src++;
|
||||
else
|
||||
*dstu++ = *src++;
|
||||
}
|
||||
dsty += stride;
|
||||
if (line & 1)
|
||||
dstv += (stride >> 1);
|
||||
else
|
||||
dstu += (stride >> 1);
|
||||
}
|
||||
}
|
||||
else {
|
||||
/* Compressed; the decompressor routines will write the data
|
||||
in planar format immediately.
|
||||
*/
|
||||
int flags;
|
||||
|
||||
flags = PWCX_FLAG_PLANAR;
|
||||
if (pdev->vsize == PSZ_VGA && pdev->vframes == 5 && pdev->vsnapshot)
|
||||
{
|
||||
printk(KERN_ERR "pwc: Mode Bayer is not supported for now\n");
|
||||
flags |= PWCX_FLAG_BAYER;
|
||||
return -ENXIO; /* No such device or address: missing decompressor */
|
||||
}
|
||||
|
||||
#if 0
|
||||
switch (pdev->type)
|
||||
{
|
||||
case 675:
|
||||
case 680:
|
||||
case 690:
|
||||
case 720:
|
||||
case 730:
|
||||
case 740:
|
||||
case 750:
|
||||
pwc_dec23_decompress(&pdev->image, &pdev->view,
|
||||
&pdev->offset, yuv, image, flags,
|
||||
pdev->decompress_data, pdev->vbandlength);
|
||||
break;
|
||||
case 645:
|
||||
case 646:
|
||||
/* TODO & FIXME */
|
||||
return -ENXIO; /* Missing decompressor */
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user