diff options
Diffstat (limited to 'circuitpython/lib/quirc/demo/scanner.c')
| -rw-r--r-- | circuitpython/lib/quirc/demo/scanner.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/circuitpython/lib/quirc/demo/scanner.c b/circuitpython/lib/quirc/demo/scanner.c new file mode 100644 index 0000000..7c6c38e --- /dev/null +++ b/circuitpython/lib/quirc/demo/scanner.c @@ -0,0 +1,214 @@ +/* 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(); +} |