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/*
# (C) 2008-2009 Elmar Kleijn <elmar_kleijn@hotmail.com>
# (C) 2008-2009 Sjoerd Piepenbrink <need4weed@gmail.com>
# (C) 2008-2009 Hans de Goede <hdegoede@redhat.com>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "libv4lprocessing.h"
#include "libv4lprocessing-priv.h"
#include "../libv4lconvert-priv.h" /* for PIX_FMT defines */
static const struct v4lprocessing_filter *filters[] = {
&whitebalance_filter,
&autogain_filter,
&gamma_filter,
};
struct v4lprocessing_data *v4lprocessing_create(int fd, struct v4lcontrol_data *control)
{
struct v4lprocessing_data *data =
calloc(1, sizeof(struct v4lprocessing_data));
if (!data) {
fprintf(stderr, "libv4lprocessing: error: out of memory!\n");
return NULL;
}
data->fd = fd;
data->control = control;
return data;
}
void v4lprocessing_destroy(struct v4lprocessing_data *data)
{
free(data);
}
int v4lprocessing_pre_processing(struct v4lprocessing_data *data)
{
int i;
data->do_process = 0;
for (i = 0; i < ARRAY_SIZE(filters); i++) {
if (filters[i]->active(data))
data->do_process = 1;
}
data->controls_changed |= v4lcontrol_controls_changed(data->control);
return data->do_process;
}
static void v4lprocessing_update_lookup_tables(struct v4lprocessing_data *data,
unsigned char *buf, const struct v4l2_format *fmt)
{
int i;
for (i = 0; i < 256; i++) {
data->comp1[i] = i;
data->green[i] = i;
data->comp2[i] = i;
}
data->lookup_table_active = 0;
for (i = 0; i < ARRAY_SIZE(filters); i++) {
if (filters[i]->active(data)) {
if (filters[i]->calculate_lookup_tables(data, buf, fmt))
data->lookup_table_active = 1;
}
}
}
static void v4lprocessing_do_processing(struct v4lprocessing_data *data,
unsigned char *buf, const struct v4l2_format *fmt)
{
int x, y;
switch (fmt->fmt.pix.pixelformat) {
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8: /* Bayer patterns starting with green */
for (y = 0; y < fmt->fmt.pix.height / 2; y++) {
for (x = 0; x < fmt->fmt.pix.width / 2; x++) {
*buf = data->green[*buf];
buf++;
*buf = data->comp1[*buf];
buf++;
}
buf += fmt->fmt.pix.bytesperline - fmt->fmt.pix.width;
for (x = 0; x < fmt->fmt.pix.width / 2; x++) {
*buf = data->comp2[*buf];
buf++;
*buf = data->green[*buf];
buf++;
}
buf += fmt->fmt.pix.bytesperline - fmt->fmt.pix.width;
}
break;
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SRGGB8: /* Bayer patterns *NOT* starting with green */
for (y = 0; y < fmt->fmt.pix.height / 2; y++) {
for (x = 0; x < fmt->fmt.pix.width / 2; x++) {
*buf = data->comp1[*buf];
buf++;
*buf = data->green[*buf];
buf++;
}
buf += fmt->fmt.pix.bytesperline - fmt->fmt.pix.width;
for (x = 0; x < fmt->fmt.pix.width / 2; x++) {
*buf = data->green[*buf];
buf++;
*buf = data->comp2[*buf];
buf++;
}
buf += fmt->fmt.pix.bytesperline - fmt->fmt.pix.width;
}
break;
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_BGR24:
for (y = 0; y < fmt->fmt.pix.height; y++) {
for (x = 0; x < fmt->fmt.pix.width; x++) {
*buf = data->comp1[*buf];
buf++;
*buf = data->green[*buf];
buf++;
*buf = data->comp2[*buf];
buf++;
}
buf += fmt->fmt.pix.bytesperline - 3 * fmt->fmt.pix.width;
}
break;
}
}
void v4lprocessing_processing(struct v4lprocessing_data *data,
unsigned char *buf, const struct v4l2_format *fmt)
{
if (!data->do_process)
return;
/* Do we support the current pixformat? */
switch (fmt->fmt.pix.pixelformat) {
case V4L2_PIX_FMT_SGBRG8:
case V4L2_PIX_FMT_SGRBG8:
case V4L2_PIX_FMT_SBGGR8:
case V4L2_PIX_FMT_SRGGB8:
case V4L2_PIX_FMT_RGB24:
case V4L2_PIX_FMT_BGR24:
break;
default:
return; /* Non supported pix format */
}
if (data->controls_changed ||
data->lookup_table_update_counter == V4L2PROCESSING_UPDATE_RATE) {
data->controls_changed = 0;
data->lookup_table_update_counter = 0;
/* Do this after resetting lookup_table_update_counter so that filters can
force the next update to be sooner when they changed camera settings */
v4lprocessing_update_lookup_tables(data, buf, fmt);
} else
data->lookup_table_update_counter++;
if (data->lookup_table_active)
v4lprocessing_do_processing(data, buf, fmt);
data->do_process = 0;
}
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