2 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
3 * Copyright (c) 2002-2007, Professor Benoit Macq
4 * Copyright (c) 2003-2007, Francois-Olivier Devaux
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
34 #include "../libopenjpeg/j2k.h"
35 #include "../libopenjpeg/jp2.h"
38 /* -------------------------------------------------------------------------- */
41 sample error callback expecting a FILE* client object
43 void error_callback(const char *msg, void *client_data) {
44 FILE *stream = (FILE*)client_data;
45 fprintf(stream, "[ERROR] %s", msg);
48 sample warning callback expecting a FILE* client object
50 void warning_callback(const char *msg, void *client_data) {
51 FILE *stream = (FILE*)client_data;
52 fprintf(stream, "[WARNING] %s", msg);
55 sample debug callback expecting a FILE* client object
57 void info_callback(const char *msg, void *client_data) {
58 FILE *stream = (FILE*)client_data;
59 fprintf(stream, "[INFO] %s", msg);
62 /* -------------------------------------------------------------------------- */
65 int main(int argc, char *argv[]) {
67 opj_event_mgr_t event_mgr; /* event manager */
73 unsigned char* frame_codestream;
76 mj2_dparameters_t parameters;
79 printf("Usage: %s mj2filename output_location\n",argv[0]);
80 printf("Example: %s foreman.mj2 output/foreman\n",argv[0]);
84 file = fopen(argv[1], "rb");
87 fprintf(stderr, "failed to open %s for reading\n", argv[1]);
92 configure the event callbacks (not required)
93 setting of each callback is optionnal
95 memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
96 event_mgr.error_handler = error_callback;
97 event_mgr.warning_handler = warning_callback;
98 event_mgr.info_handler = info_callback;
100 /* get a MJ2 decompressor handle */
101 dinfo = mj2_create_decompress();
103 /* catch events using our callbacks and give a local context */
104 opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);
106 /* setup the decoder decoding parameters using user parameters */
107 movie = (opj_mj2_t*) dinfo->mj2_handle;
108 mj2_setup_decoder((opj_mj2_t*)dinfo->mj2_handle, ¶meters);
110 if (mj2_read_struct(file, movie)) // Creating the movie structure
113 // Decode first video track
115 while (movie->tk[tnum].track_type != 0)
118 track = &movie->tk[tnum];
120 fprintf(stdout,"Extracting %d frames from file...\n",track->num_samples);
122 for (snum=0; snum < track->num_samples; snum++)
124 sample = &track->sample[snum];
125 frame_codestream = (unsigned char*) malloc (sample->sample_size-8); // Skipping JP2C marker
126 fseek(file,sample->offset+8,SEEK_SET);
127 fread(frame_codestream,sample->sample_size-8,1, file); // Assuming that jp and ftyp markers size do
129 sprintf(outfilename,"%s_%05d.j2k",argv[2],snum);
130 outfile = fopen(outfilename, "wb");
132 fprintf(stderr, "failed to open %s for writing\n",outfilename);
135 fwrite(frame_codestream,sample->sample_size-8,1,outfile);
137 free(frame_codestream);
140 fprintf(stdout, "%d frames correctly extracted\n", snum);
142 /* free remaining structures */
144 mj2_destroy_decompress((opj_mj2_t*)dinfo->mj2_handle);