1/*
2 * Small jpeg decoder library - testing application
3 *
4 * Copyright (c) 2006, Luc Saillard <luc@saillard.org>
5 * Copyright (c) 2012 Intel Corporation.
6 * All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * - Redistributions of source code must retain the above copyright notice,
11 *  this list of conditions and the following disclaimer.
12 *
13 * - Redistributions in binary form must reproduce the above copyright notice,
14 *  this list of conditions and the following disclaimer in the documentation
15 *  and/or other materials provided with the distribution.
16 *
17 * - Neither the name of the author nor the names of its contributors may be
18 *  used to endorse or promote products derived from this software without
19 *  specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35#include "tinyjpeg.h"
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <time.h>
40#include "va_display.h"
41
42static void exitmessage(const char *message) __attribute__((noreturn));
43static void exitmessage(const char *message)
44{
45  printf("%s\n", message);
46  exit(0);
47}
48
49static int filesize(FILE *fp)
50{
51  long pos;
52  fseek(fp, 0, SEEK_END);
53  pos = ftell(fp);
54  fseek(fp, 0, SEEK_SET);
55  return pos;
56}
57
58/**
59 * Load one jpeg image, and decompress it, and save the result.
60 */
61int convert_one_image(const char *infilename)
62{
63  FILE *fp;
64  unsigned int length_of_file;
65  unsigned int width, height;
66  unsigned char *buf;
67  struct jdec_private *jdec;
68
69  /* Load the Jpeg into memory */
70  fp = fopen(infilename, "rb");
71  if (fp == NULL)
72    exitmessage("Cannot open filename\n");
73  length_of_file = filesize(fp);
74  buf = (unsigned char *)malloc(length_of_file + 4);
75  if (buf == NULL)
76    exitmessage("Not enough memory for loading file\n");
77  fread(buf, length_of_file, 1, fp);
78  fclose(fp);
79
80  /* Decompress it */
81  jdec = tinyjpeg_init();
82  if (jdec == NULL)
83    exitmessage("Not enough memory to alloc the structure need for decompressing\n");
84
85  if (tinyjpeg_parse_header(jdec, buf, length_of_file)<0)
86    exitmessage(tinyjpeg_get_errorstring(jdec));
87
88  /* Get the size of the image */
89  tinyjpeg_get_size(jdec, &width, &height);
90
91  printf("Decoding JPEG image %dx%d...\n", width, height);
92  if (tinyjpeg_decode(jdec) < 0)
93    exitmessage(tinyjpeg_get_errorstring(jdec));
94
95  tinyjpeg_free(jdec);
96
97  free(buf);
98  return 0;
99}
100
101static void usage(void)
102{
103    fprintf(stderr, "Usage: loadjpeg <input_filename.jpeg> \n");
104    exit(1);
105}
106
107/**
108 * main
109 *
110 */
111int main(int argc, char *argv[])
112{
113  char *input_filename;
114  clock_t start_time, finish_time;
115  unsigned int duration;
116  int current_argument;
117
118  va_init_display_args(&argc, argv);
119
120  if (argc < 2)
121    usage();
122
123  current_argument = 1;
124  input_filename = argv[current_argument];
125
126  start_time = clock();
127  convert_one_image(input_filename);
128  finish_time = clock();
129  duration = finish_time - start_time;
130  printf("Decoding finished in %u ticks\n", duration);
131
132  return 0;
133}
134
135
136
137
138