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/*
* Small jpeg decoder library - testing application
*
* Copyright (c) 2006, Luc Saillard <luc@saillard.org>
* Copyright (c) 2012 Intel Corporation.
* All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the author nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "tinyjpeg.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
static void exitmessage(const char *message) __attribute__((noreturn));
static void exitmessage(const char *message)
{
printf("%s\n", message);
exit(0);
}
static int filesize(FILE *fp)
{
long pos;
fseek(fp, 0, SEEK_END);
pos = ftell(fp);
fseek(fp, 0, SEEK_SET);
return pos;
}
/**
* Load one jpeg image, and decompress it, and save the result.
*/
int convert_one_image(const char *infilename)
{
FILE *fp;
unsigned int length_of_file;
unsigned int width, height;
unsigned char *buf;
struct jdec_private *jdec;
/* Load the Jpeg into memory */
fp = fopen(infilename, "rb");
if (fp == NULL)
exitmessage("Cannot open filename\n");
length_of_file = filesize(fp);
buf = (unsigned char *)malloc(length_of_file + 4);
if (buf == NULL)
exitmessage("Not enough memory for loading file\n");
fread(buf, length_of_file, 1, fp);
fclose(fp);
/* Decompress it */
jdec = tinyjpeg_init();
if (jdec == NULL)
exitmessage("Not enough memory to alloc the structure need for decompressing\n");
if (tinyjpeg_parse_header(jdec, buf, length_of_file)<0)
exitmessage(tinyjpeg_get_errorstring(jdec));
/* Get the size of the image */
tinyjpeg_get_size(jdec, &width, &height);
printf("Decoding JPEG image %xx%x...\n", width, height);
if (tinyjpeg_decode(jdec) < 0)
exitmessage(tinyjpeg_get_errorstring(jdec));
tinyjpeg_free(jdec);
free(buf);
return 0;
}
static void usage(void)
{
fprintf(stderr, "Usage: loadjpeg <input_filename.jpeg> \n");
exit(1);
}
/**
* main
*
*/
int main(int argc, char *argv[])
{
char *input_filename;
clock_t start_time, finish_time;
unsigned int duration;
int current_argument;
if (argc < 2)
usage();
current_argument = 1;
input_filename = argv[current_argument];
start_time = clock();
convert_one_image(input_filename);
finish_time = clock();
duration = finish_time - start_time;
printf("Decoding finished in %u ticks\n", duration);
return 0;
}
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