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-rw-r--r--sys/qcam/exposure.c99
1 files changed, 50 insertions, 49 deletions
diff --git a/sys/qcam/exposure.c b/sys/qcam/exposure.c
index b393bdb7..b63e364f 100644
--- a/sys/qcam/exposure.c
+++ b/sys/qcam/exposure.c
@@ -49,8 +49,8 @@ SOFTWARE.
* prototyped in qcamip.h
*/
-static int qcip_pixel_average(struct qcam *q, scanbuf *scan);
-static int qcip_luminance_std(struct qcam *q, scanbuf *scan, int avg);
+static int qcip_pixel_average (struct qcam *q, scanbuf * scan);
+static int qcip_luminance_std (struct qcam *q, scanbuf * scan, int avg);
/* Private data used by the auto exposure routine */
@@ -63,7 +63,7 @@ static int ae_mode = AE_ALL_AVG;
/* Calculate average pixel value for entire image */
static int
-qcip_pixel_average(struct qcam *q, scanbuf *scan)
+qcip_pixel_average (struct qcam *q, scanbuf * scan)
{
int count = 0;
int sum = 0;
@@ -83,7 +83,7 @@ qcip_pixel_average(struct qcam *q, scanbuf *scan)
/* Calculate average pixel value for center of image */
static int
-qcip_pixel_average_center(struct qcam *q, scanbuf *scan)
+qcip_pixel_average_center (struct qcam *q, scanbuf * scan)
{
int count = 0;
int sum = 0;
@@ -95,12 +95,12 @@ qcip_pixel_average_center(struct qcam *q, scanbuf *scan)
width = q->width / q->transfer_scale;
height = q->height / q->transfer_scale;
- maxcol = width * 2 / 3;
+ maxcol = width * 2 / 3;
maxrow = height * 2 / 3;
- for (i = width/3; i < maxcol; i++) {
- for (j = height/3; j < maxrow; j++) {
- sum += scan[j*width+i];
+ for (i = width / 3; i < maxcol; i++) {
+ for (j = height / 3; j < maxrow; j++) {
+ sum += scan[j * width + i];
count++;
}
}
@@ -108,7 +108,7 @@ qcip_pixel_average_center(struct qcam *q, scanbuf *scan)
}
int
-qcip_set_luminance_target(struct qcam *q, int val)
+qcip_set_luminance_target (struct qcam *q, int val)
{
const int max_pixel_val = q->bpp == 6 ? 63 : 15;
@@ -121,7 +121,7 @@ qcip_set_luminance_target(struct qcam *q, int val)
}
int
-qcip_set_luminance_tolerance(struct qcam *q, int val)
+qcip_set_luminance_tolerance (struct qcam *q, int val)
{
const int max_pixel_val = q->bpp == 6 ? 63 : 15;
@@ -139,21 +139,21 @@ qcip_set_luminance_tolerance(struct qcam *q, int val)
}
int
-qcip_set_luminance_std_target(struct qcam *q, int val)
+qcip_set_luminance_std_target (struct qcam *q, int val)
{
luminance_std_target = val;
return QCIP_XPSR_OK;
}
int
-qcip_set_luminance_std_tolerance(struct qcam *q, int val)
+qcip_set_luminance_std_tolerance (struct qcam *q, int val)
{
luminance_std_tolerance = val;
return QCIP_XPSR_OK;
}
int
-qcip_set_autoexposure_mode(int val)
+qcip_set_autoexposure_mode (int val)
{
ae_mode = val;
return 0;
@@ -162,7 +162,7 @@ qcip_set_autoexposure_mode(int val)
/* Calculate standard deviation of pixel value for entire image */
static int
-qcip_luminance_std(struct qcam *q, scanbuf *scan, int avg)
+qcip_luminance_std (struct qcam *q, scanbuf * scan, int avg)
{
int count = 0;
int sum = 0;
@@ -197,7 +197,7 @@ qcip_luminance_std(struct qcam *q, scanbuf *scan, int avg)
*/
int
-qcip_autoexposure(struct qcam *q, scanbuf *scan)
+qcip_autoexposure (struct qcam *q, scanbuf * scan)
{
int luminance_dif;
int luminance_avg;
@@ -207,45 +207,46 @@ qcip_autoexposure(struct qcam *q, scanbuf *scan)
int ret = QCIP_XPSR_OK;
#ifdef DEBUG
- fprintf(stderr, "Brightness: %d Contrast: %d\n",
- qc_getbrightness(q), qc_getcontrast(q));
+ fprintf (stderr, "Brightness: %d Contrast: %d\n",
+ qc_getbrightness (q), qc_getcontrast (q));
#endif
switch (ae_mode) {
- case AE_CTR_AVG:
- luminance_avg = qcip_pixel_average_center(q, scan);
- break;
- case AE_STD_AVG:
- luminance_avg = qcip_pixel_average(q, scan);
- lum_std = qcip_luminance_std(q, scan, luminance_avg);
-
- /* ==>> Contrast adjustment <<== */
-
- /* set target if it has not been explicitly set */
- if (luminance_std_target == -1) {
- luminance_std_target = q->bpp == 6 ? 10 : 2;
- }
+ case AE_CTR_AVG:
+ luminance_avg = qcip_pixel_average_center (q, scan);
+ break;
+ case AE_STD_AVG:
+ luminance_avg = qcip_pixel_average (q, scan);
+ lum_std = qcip_luminance_std (q, scan, luminance_avg);
+
+ /* ==>> Contrast adjustment <<== */
+
+ /* set target if it has not been explicitly set */
+ if (luminance_std_target == -1) {
+ luminance_std_target = q->bpp == 6 ? 10 : 2;
+ }
- /* Adjust contrast to reach target luminance standard deviation */
- lum_std_min = luminance_std_target - luminance_std_tolerance;
- lum_std_max = luminance_std_target + luminance_std_tolerance;
+ /* Adjust contrast to reach target luminance standard deviation */
+ lum_std_min = luminance_std_target - luminance_std_tolerance;
+ lum_std_max = luminance_std_target + luminance_std_tolerance;
- if (lum_std < lum_std_min || lum_std > lum_std_max) {
- ret = QCIP_XPSR_RSCN;
- if (qc_setcontrast(q, luminance_std_target - lum_std + qc_getcontrast(q))) {
- return QCIP_XPSR_ERR;
+ if (lum_std < lum_std_min || lum_std > lum_std_max) {
+ ret = QCIP_XPSR_RSCN;
+ if (qc_setcontrast (q,
+ luminance_std_target - lum_std + qc_getcontrast (q))) {
+ return QCIP_XPSR_ERR;
+ }
}
- }
#ifdef DEBUG
- fprintf(stderr, "Luminance std/target/tolerance: %d/%d/%d\n",
- lum_std, luminance_std_target, luminance_std_tolerance );
+ fprintf (stderr, "Luminance std/target/tolerance: %d/%d/%d\n",
+ lum_std, luminance_std_target, luminance_std_tolerance);
#endif
-
- break;
- case AE_ALL_AVG:
- default:
- luminance_avg = qcip_pixel_average(q, scan);
- break;
+
+ break;
+ case AE_ALL_AVG:
+ default:
+ luminance_avg = qcip_pixel_average (q, scan);
+ break;
}
/* ==>> Brightness adjustment <<== */
@@ -259,8 +260,8 @@ qcip_autoexposure(struct qcam *q, scanbuf *scan)
lum_max = luminance_target + luminance_tolerance;
#ifdef DEBUG
- fprintf(stderr, "Luminance avg/target/tolerance: %d/%d/%d\n",
- luminance_avg, luminance_target, luminance_tolerance );
+ fprintf (stderr, "Luminance avg/target/tolerance: %d/%d/%d\n",
+ luminance_avg, luminance_target, luminance_tolerance);
#endif
/* check for luminance within target range */
@@ -277,7 +278,7 @@ qcip_autoexposure(struct qcam *q, scanbuf *scan)
/* Adjusted brightness is out of range ..
* throw in the towel ... auto-exposure has failed!
*/
- if (qc_setbrightness(q, brightness_adj + qc_getbrightness(q))) {
+ if (qc_setbrightness (q, brightness_adj + qc_getbrightness (q))) {
return QCIP_XPSR_ERR;
}
}
generated by cgit v1.2.1 (git 2.18.0) at 2024-07-20 22:23:52 +0000