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V4L/DVB (8198): gspca: Frame decoding errors when PAC207 in full daylight.

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Signed-off-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans de Goede 2008-07-04 18:39:08 -03:00 committed by Mauro Carvalho Chehab
parent ab8f12cf8e
commit 46ccdafa71
1 changed files with 10 additions and 2 deletions
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12
drivers/media/video/gspca/pac207.c
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@ -40,9 +40,17 @@ MODULE_LICENSE("GPL");
#define PAC207_BRIGHTNESS_MAX 255
#define PAC207_BRIGHTNESS_DEFAULT 4 /* power on default: 4 */
#define PAC207_EXPOSURE_MIN 4
/* An exposure value of 4 also works (3 does not) but then we need to lower
the compression balance setting when in 352x288 mode, otherwise the usb
bandwidth is not enough and packets get dropped resulting in corrupt
frames. The problem with this is that when the compression balance gets
lowered below 0x80, the pac207 starts using a different compression
algorithm for some lines, these lines get prefixed with a 0x2dd2 prefix
and currently we do not know how to decompress these lines, so for now
we use a minimum exposure value of 5 */
#define PAC207_EXPOSURE_MIN 5
#define PAC207_EXPOSURE_MAX 26
#define PAC207_EXPOSURE_DEFAULT 4 /* power on default: 3 ?? */
#define PAC207_EXPOSURE_DEFAULT 5 /* power on default: 3 ?? */
#define PAC207_EXPOSURE_KNEE 11 /* 4 = 30 fps, 11 = 8, 15 = 6 */
#define PAC207_GAIN_MIN 0