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V4L/DVB (9543): gspca: Adjust autoexpo values for cams with a vga sensor in sonixb.

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- This patch makes sonixb.c strife to different values during autoexposure
  for sif versus vga sensors.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2008-10-22 04:59:29 -03:00 committed by Mauro Carvalho Chehab
parent 0cae89647e
commit 5017c7bde4
1 changed files with 13 additions and 4 deletions
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17
drivers/media/video/gspca/sonixb.c
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@ -132,8 +132,6 @@ struct sensor_data {
ignore atleast the 2 next frames for the new settings to come into effect
before doing any other adjustments */
#define AUTOGAIN_IGNORE_FRAMES 3
#define AUTOGAIN_DEADZONE 1000
#define DESIRED_AVG_LUM 7000
/* V4L2 controls supported by the driver */
static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val);
@ -827,17 +825,28 @@ static void setfreq(struct gspca_dev *gspca_dev)
static void do_autogain(struct gspca_dev *gspca_dev)
{
int deadzone, desired_avg_lum;
struct sd *sd = (struct sd *) gspca_dev;
int avg_lum = atomic_read(&sd->avg_lum);
if (avg_lum == -1)
return;
/* SIF / VGA sensors have a different autoexposure area and thus
different avg_lum values for the same picture brightness */
if (sensor_data[sd->sensor].flags & F_SIF) {
deadzone = 1000;
desired_avg_lum = 7000;
} else {
deadzone = 3000;
desired_avg_lum = 23000;
}
if (sd->autogain_ignore_frames > 0)
sd->autogain_ignore_frames--;
else if (gspca_auto_gain_n_exposure(gspca_dev, avg_lum,
sd->brightness * DESIRED_AVG_LUM / 127,
AUTOGAIN_DEADZONE, GAIN_KNEE, EXPOSURE_KNEE)) {
sd->brightness * desired_avg_lum / 127,
deadzone, GAIN_KNEE, EXPOSURE_KNEE)) {
PDEBUG(D_FRAM, "autogain: gain changed: gain: %d expo: %d\n",
(int)sd->gain, (int)sd->exposure);
sd->autogain_ignore_frames = AUTOGAIN_IGNORE_FRAMES;