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