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/* quirc -- QR-code recognition library
* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <ctype.h>
#include <unistd.h>
#include <quirc.h>
#include <time.h>
#include <getopt.h>
#include "camera.h"
#include "mjpeg.h"
#include "convert.h"
#include "dthash.h"
#include "demoutil.h"
/* Collected command-line arguments */
static const char *camera_path = "/dev/video0";
static int video_width = 640;
static int video_height = 480;
static int want_verbose = 0;
static int printer_timeout = 2;
static int main_loop(struct camera *cam,
struct quirc *q, struct mjpeg_decoder *mj)
{
struct dthash dt;
dthash_init(&dt, printer_timeout);
for (;;) {
int w, h;
int i, count;
uint8_t *buf = quirc_begin(q, &w, &h);
const struct camera_buffer *head;
const struct camera_parms *parms = camera_get_parms(cam);
if (camera_dequeue_one(cam) < 0) {
perror("camera_dequeue_one");
return -1;
}
head = camera_get_head(cam);
switch (parms->format) {
case CAMERA_FORMAT_MJPEG:
mjpeg_decode_gray(mj, head->addr, head->size,
buf, w, w, h);
break;
case CAMERA_FORMAT_YUYV:
yuyv_to_luma(head->addr, w * 2, w, h, buf, w);
break;
default:
fprintf(stderr, "Unknown frame format\n");
return -1;
}
if (camera_enqueue_all(cam) < 0) {
perror("camera_enqueue_all");
return -1;
}
quirc_end(q);
count = quirc_count(q);
for (i = 0; i < count; i++) {
struct quirc_code code;
struct quirc_data data;
quirc_extract(q, i, &code);
if (!quirc_decode(&code, &data))
print_data(&data, &dt, want_verbose);
}
}
}
static int run_scanner(void)
{
struct quirc *qr;
struct camera cam;
struct mjpeg_decoder mj;
const struct camera_parms *parms;
camera_init(&cam);
if (camera_open(&cam, camera_path, video_width, video_height,
25, 1) < 0) {
perror("camera_open");
goto fail_qr;
}
if (camera_map(&cam, 8) < 0) {
perror("camera_map");
goto fail_qr;
}
if (camera_on(&cam) < 0) {
perror("camera_on");
goto fail_qr;
}
if (camera_enqueue_all(&cam) < 0) {
perror("camera_enqueue_all");
goto fail_qr;
}
parms = camera_get_parms(&cam);
qr = quirc_new();
if (!qr) {
perror("couldn't allocate QR decoder");
goto fail_qr;
}
if (quirc_resize(qr, parms->width, parms->height) < 0) {
perror("couldn't allocate QR buffer");
goto fail_qr_resize;
}
mjpeg_init(&mj);
if (main_loop(&cam, qr, &mj) < 0)
goto fail_main_loop;
mjpeg_free(&mj);
quirc_destroy(qr);
camera_destroy(&cam);
return 0;
fail_main_loop:
mjpeg_free(&mj);
fail_qr_resize:
quirc_destroy(qr);
fail_qr:
camera_destroy(&cam);
return -1;
}
static void usage(const char *progname)
{
printf("Usage: %s [options]\n\n"
"Valid options are:\n\n"
" -v Show extra data for detected codes.\n"
" -d <device> Specify camera device path.\n"
" -s <WxH> Specify video dimensions.\n"
" -p <timeout> Set printer timeout (seconds).\n"
" --help Show this information.\n"
" --version Show library version information.\n",
progname);
}
int main(int argc, char **argv)
{
static const struct option longopts[] = {
{"help", 0, 0, 'H'},
{"version", 0, 0, 'V'},
{NULL, 0, 0, 0}
};
int opt;
printf("quirc scanner demo\n");
printf("Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>\n");
printf("\n");
while ((opt = getopt_long(argc, argv, "d:s:vg:p:",
longopts, NULL)) >= 0)
switch (opt) {
case 'V':
printf("Library version: %s\n", quirc_version());
return 0;
case 'H':
usage(argv[0]);
return 0;
case 'v':
want_verbose = 1;
break;
case 's':
if (parse_size(optarg, &video_width, &video_height) < 0)
return -1;
break;
case 'p':
printer_timeout = atoi(optarg);
break;
case 'd':
camera_path = optarg;
break;
case '?':
fprintf(stderr, "Try --help for usage information\n");
return -1;
}
return run_scanner();
}
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