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) {
50 FILE *stream = (FILE*)client_data;
51 fprintf(stream, "[ERROR] %s", msg);
54 sample warning callback expecting a FILE* client object
56 void warning_callback(const char *msg, void *client_data) {
57 FILE *stream = (FILE*)client_data;
58 fprintf(stream, "[WARNING] %s", msg);
61 sample debug callback expecting a FILE* client object
63 void info_callback(const char *msg, void *client_data) {
64 FILE *stream = (FILE*)client_data;
65 fprintf(stream, "[INFO] %s", msg);
68 /* -------------------------------------------------------------------------- */
71 int main(int argc, char *argv[]) {
73 opj_event_mgr_t event_mgr; /* event manager */
79 unsigned char* frame_codestream;
82 mj2_dparameters_t parameters;
85 printf("Usage: %s mj2filename output_location\n",argv[0]);
86 printf("Example: %s foreman.mj2 output/foreman\n",argv[0]);
90 file = fopen(argv[1], "rb");
93 fprintf(stderr, "failed to open %s for reading\n", argv[1]);
98 configure the event callbacks (not required)
99 setting of each callback is optionnal
101 memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
102 event_mgr.error_handler = error_callback;
103 event_mgr.warning_handler = warning_callback;
104 event_mgr.info_handler = info_callback;
106 /* get a MJ2 decompressor handle */
107 dinfo = mj2_create_decompress();
109 /* catch events using our callbacks and give a local context */
110 opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);
112 /* setup the decoder decoding parameters using user parameters */
113 memset(¶meters, 0, sizeof(mj2_dparameters_t));
114 movie = (opj_mj2_t*) dinfo->mj2_handle;
115 mj2_setup_decoder(movie, ¶meters);
117 if (mj2_read_struct(file, movie)) /* Creating the movie structure*/
120 /* Decode first video track */
122 while (movie->tk[tnum].track_type != 0)
125 track = &movie->tk[tnum];
127 fprintf(stdout,"Extracting %d frames from file...\n",track->num_samples);
129 for (snum=0; snum < track->num_samples; snum++)
131 sample = &track->sample[snum];
132 frame_codestream = (unsigned char*) malloc (sample->sample_size-8); /* Skipping JP2C marker*/
133 fseek(file,sample->offset+8,SEEK_SET);
134 fread(frame_codestream,sample->sample_size-8,1, file); /* Assuming that jp and ftyp markers size do*/
136 sprintf(outfilename,"%s_%05d.j2k",argv[2],snum);
137 outfile = fopen(outfilename, "wb");
139 fprintf(stderr, "failed to open %s for writing\n",outfilename);
142 fwrite(frame_codestream,sample->sample_size-8,1,outfile);
144 free(frame_codestream);
147 fprintf(stdout, "%d frames correctly extracted\n", snum);
149 /* free remaining structures */
151 mj2_destroy_decompress((opj_mj2_t*)dinfo->mj2_handle);