142 lines
3.5 KiB
C
142 lines
3.5 KiB
C
/* quirc -- QR-code recognition library
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* Copyright (C) 2010-2012 Daniel Beer <dlbeer@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <setjmp.h>
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#include <jpeglib.h>
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#include "dbgutil.h"
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void dump_data(const struct quirc_data *data)
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{
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printf(" Version: %d\n", data->version);
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printf(" ECC level: %c\n", "MLHQ"[data->ecc_level]);
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printf(" Mask: %d\n", data->mask);
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printf(" Data type: %d\n", data->data_type);
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printf(" Length: %d\n", data->payload_len);
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printf(" Payload: %s\n", data->payload);
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}
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void dump_cells(const struct quirc_code *code)
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{
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int u, v;
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printf(" %d cells, corners:", code->size);
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for (u = 0; u < 4; u++)
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printf(" (%d,%d)", code->corners[u].x,
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code->corners[u].y);
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printf("\n");
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for (v = 0; v < code->size; v++) {
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printf(" ");
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for (u = 0; u < code->size; u++) {
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int p = v * code->size + u;
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if (code->cell_bitmap[p >> 3] & (1 << (p & 7)))
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printf("[]");
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else
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printf(" ");
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}
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printf("\n");
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}
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}
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struct my_jpeg_error {
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struct jpeg_error_mgr base;
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jmp_buf env;
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};
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static void my_output_message(struct jpeg_common_struct *com)
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{
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struct my_jpeg_error *err = (struct my_jpeg_error *)com->err;
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char buf[JMSG_LENGTH_MAX];
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err->base.format_message(com, buf);
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fprintf(stderr, "JPEG error: %s", buf);
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}
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static void my_error_exit(struct jpeg_common_struct *com)
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{
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struct my_jpeg_error *err = (struct my_jpeg_error *)com->err;
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my_output_message(com);
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longjmp(err->env, 0);
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}
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static struct jpeg_error_mgr *my_error_mgr(struct my_jpeg_error *err)
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{
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jpeg_std_error(&err->base);
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err->base.error_exit = my_error_exit;
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err->base.output_message = my_output_message;
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return &err->base;
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}
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int load_jpeg(struct quirc *q, const char *filename)
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{
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FILE *infile = fopen(filename, "rb");
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struct jpeg_decompress_struct dinfo;
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struct my_jpeg_error err;
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uint8_t *image;
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int y;
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if (!infile) {
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perror("can't open input file");
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return -1;
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}
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memset(&dinfo, 0, sizeof(dinfo));
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dinfo.err = my_error_mgr(&err);
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if (setjmp(err.env))
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goto fail;
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jpeg_create_decompress(&dinfo);
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jpeg_stdio_src(&dinfo, infile);
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jpeg_read_header(&dinfo, TRUE);
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dinfo.output_components = 1;
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dinfo.out_color_space = JCS_GRAYSCALE;
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jpeg_start_decompress(&dinfo);
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if (dinfo.output_components != 1) {
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fprintf(stderr, "Unexpected number of output components: %d",
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dinfo.output_components);
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goto fail;
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}
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if (quirc_resize(q, dinfo.output_width, dinfo.output_height) < 0)
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goto fail;
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image = quirc_begin(q, NULL, NULL);
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for (y = 0; y < dinfo.output_height; y++) {
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JSAMPROW row_pointer = image + y * dinfo.output_width;
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jpeg_read_scanlines(&dinfo, &row_pointer, 1);
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}
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fclose(infile);
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jpeg_finish_decompress(&dinfo);
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jpeg_destroy_decompress(&dinfo);
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return 0;
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fail:
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fclose(infile);
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jpeg_destroy_decompress(&dinfo);
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return -1;
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}
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