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
42 static void exitmessage(const char *message) __attribute__((noreturn));
exitmessage(const char * message)43 static void exitmessage(const char *message)
44 {
45 printf("%s\n", message);
46 exit(0);
47 }
48
filesize(FILE * fp)49 static 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 */
convert_one_image(const char * infilename)61 int 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
usage(void)101 static void usage(void)
102 {
103 fprintf(stderr, "Usage: loadjpeg <input_filename.jpeg> \n");
104 exit(1);
105 }
106
107 /**
108 * main
109 *
110 */
main(int argc,char * argv[])111 int 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