quirc/lib/quirc.c
Alexandre Perrin 3a6efb3d84 Large images decoding support
Fix #2, this patch makes large images support a compile time option by
allowing QUIRC_MAX_REGIONS to be tuned via CFLAGS up to 65534 (current
default is 254).
2016-07-15 14:40:40 +02:00

91 lines
2.3 KiB
C

/* 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 <string.h>
#include "quirc_internal.h"
const char *quirc_version(void)
{
return "1.0";
}
struct quirc *quirc_new(void)
{
struct quirc *q = malloc(sizeof(*q));
if (!q)
return NULL;
memset(q, 0, sizeof(*q));
return q;
}
void quirc_destroy(struct quirc *q)
{
if (q->image)
free(q->image);
if (sizeof(*q->image) != sizeof(*q->pixels))
free(q->pixels);
free(q);
}
int quirc_resize(struct quirc *q, int w, int h)
{
uint8_t *new_image = realloc(q->image, w * h);
if (!new_image)
return -1;
if (sizeof(*q->image) != sizeof(*q->pixels)) {
size_t new_size = w * h * sizeof(quirc_pixel_t);
quirc_pixel_t *new_pixels = realloc(q->pixels, new_size);
if (!new_pixels)
return -1;
q->pixels = new_pixels;
}
q->image = new_image;
q->w = w;
q->h = h;
return 0;
}
int quirc_count(const struct quirc *q)
{
return q->num_grids;
}
static const char *const error_table[] = {
[QUIRC_SUCCESS] = "Success",
[QUIRC_ERROR_INVALID_GRID_SIZE] = "Invalid grid size",
[QUIRC_ERROR_INVALID_VERSION] = "Invalid version",
[QUIRC_ERROR_FORMAT_ECC] = "Format data ECC failure",
[QUIRC_ERROR_DATA_ECC] = "ECC failure",
[QUIRC_ERROR_UNKNOWN_DATA_TYPE] = "Unknown data type",
[QUIRC_ERROR_DATA_OVERFLOW] = "Data overflow",
[QUIRC_ERROR_DATA_UNDERFLOW] = "Data underflow"
};
const char *quirc_strerror(quirc_decode_error_t err)
{
if (err >= 0 && err < sizeof(error_table) / sizeof(error_table[0]))
return error_table[err];
return "Unknown error";
}