2 * The copyright in this software is being made available under the 2-clauses
3 * BSD License, included below. This software may be subject to other third
4 * party and contributor rights, including patent rights, and no such rights
5 * are granted under this license.
7 * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
8 * Copyright (c) 2002-2014, Professor Benoit Macq
9 * Copyright (c) 2003-2007, Francois-Olivier Devaux
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
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.
44 /* -------------------------------------------------------------------------- */
47 sample error callback expecting a FILE* client object
49 void error_callback(const char *msg, void *client_data)
51 FILE *stream = (FILE*)client_data;
52 fprintf(stream, "[ERROR] %s", msg);
55 sample warning callback expecting a FILE* client object
57 void warning_callback(const char *msg, void *client_data)
59 FILE *stream = (FILE*)client_data;
60 fprintf(stream, "[WARNING] %s", msg);
63 sample debug callback expecting a FILE* client object
65 void info_callback(const char *msg, void *client_data)
67 FILE *stream = (FILE*)client_data;
68 fprintf(stream, "[INFO] %s", msg);
71 /* -------------------------------------------------------------------------- */
74 int main(int argc, char *argv[])
77 opj_event_mgr_t event_mgr; /* event manager */
83 unsigned char* frame_codestream;
86 mj2_dparameters_t parameters;
89 printf("Usage: %s mj2filename output_prefix\n", argv[0]);
90 printf("Example: %s foreman.mj2 output/foreman\n", argv[0]);
94 file = fopen(argv[1], "rb");
97 fprintf(stderr, "failed to open %s for reading\n", argv[1]);
102 configure the event callbacks (not required)
103 setting of each callback is optional
105 memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
106 event_mgr.error_handler = error_callback;
107 event_mgr.warning_handler = warning_callback;
108 event_mgr.info_handler = info_callback;
110 /* get a MJ2 decompressor handle */
111 dinfo = mj2_create_decompress();
113 /* catch events using our callbacks and give a local context */
114 opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);
116 /* setup the decoder decoding parameters using user parameters */
117 memset(¶meters, 0, sizeof(mj2_dparameters_t));
118 movie = (opj_mj2_t*) dinfo->mj2_handle;
119 mj2_setup_decoder(movie, ¶meters);
121 if (mj2_read_struct(file, movie)) { /* Creating the movie structure*/
125 /* Decode first video track */
127 while (movie->tk[tnum].track_type != 0) {
131 track = &movie->tk[tnum];
133 fprintf(stdout, "Extracting %d frames from file...\n", track->num_samples);
135 for (snum = 0; snum < track->num_samples; snum++) {
136 sample = &track->sample[snum];
137 frame_codestream = (unsigned char*) malloc(sample->sample_size -
138 8); /* Skipping JP2C marker*/
139 fseek(file, sample->offset + 8, SEEK_SET);
140 fread(frame_codestream, sample->sample_size - 8, 1,
141 file); /* Assuming that jp and ftyp markers size do*/
143 sprintf(outfilename, "%s_%05d.j2k", argv[2], snum);
144 outfile = fopen(outfilename, "wb");
146 fprintf(stderr, "failed to open %s for writing\n", outfilename);
149 fwrite(frame_codestream, sample->sample_size - 8, 1, outfile);
151 free(frame_codestream);
154 fprintf(stdout, "%d frames correctly extracted\n", snum);
156 /* free remaining structures */
158 mj2_destroy_decompress((opj_mj2_t*)dinfo->mj2_handle);