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/*

 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium

 * Copyright (c) 2002-2007, Professor Benoit Macq

 * Copyright (c) 2003-2007, Francois-Olivier Devaux

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 */

#include 

#include 

#include 

#include "openjpeg.h"

#include "../libopenjpeg/j2k.h"

#include "../libopenjpeg/jp2.h"

#include "mj2.h"

/* -------------------------------------------------------------------------- */

/**

sample error callback expecting a FILE* client object

*/

void error_callback(const char *msg, void *client_data) {

	FILE *stream = (FILE*)client_data;

	fprintf(stream, "[ERROR] %s", msg);

}

/**

sample warning callback expecting a FILE* client object

*/

void warning_callback(const char *msg, void *client_data) {

	FILE *stream = (FILE*)client_data;

	fprintf(stream, "[WARNING] %s", msg);

}

/**

sample debug callback expecting a FILE* client object

*/

void info_callback(const char *msg, void *client_data) {

	FILE *stream = (FILE*)client_data;

	fprintf(stream, "[INFO] %s", msg);

}

/* -------------------------------------------------------------------------- */

int main(int argc, char *argv[]) {

	opj_dinfo_t* dinfo;

	opj_event_mgr_t event_mgr;		/* event manager */

  int tnum;

  unsigned int snum;

  opj_mj2_t *movie;

  mj2_tk_t *track;

  mj2_sample_t *sample;

  unsigned char* frame_codestream;

  FILE *file, *outfile;

  char outfilename[50];

	mj2_dparameters_t parameters;

  if (argc != 3) {

    printf("Usage: %s mj2filename output_location\n",argv[0]);

    printf("Example: %s foreman.mj2 output/foreman\n",argv[0]);

    return 1;

  }

  file = fopen(argv[1], "rb");

  if (!file) {

    fprintf(stderr, "failed to open %s for reading\n", argv[1]);

    return 1;

  }

	/*

	configure the event callbacks (not required)

	setting of each callback is optionnal

	*/

	memset(&event_mgr, 0, sizeof(opj_event_mgr_t));

	event_mgr.error_handler = error_callback;

	event_mgr.warning_handler = warning_callback;

	event_mgr.info_handler = info_callback;

	/* get a MJ2 decompressor handle */

	dinfo = mj2_create_decompress();

	/* catch events using our callbacks and give a local context */

	opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);

	/* setup the decoder decoding parameters using user parameters */

	movie = (opj_mj2_t*) dinfo->mj2_handle;

	mj2_setup_decoder((opj_mj2_t*)dinfo->mj2_handle, ¶meters);

  if (mj2_read_struct(file, movie)) // Creating the movie structure

    return 1;

  // Decode first video track

  tnum = 0;

  while (movie->tk[tnum].track_type != 0)

    tnum ++;

  track = &movie->tk[tnum];

  fprintf(stdout,"Extracting %d frames from file...\n",track->num_samples);

  for (snum=0; snum < track->num_samples; snum++)

  {

    sample = &track->sample[snum];

    frame_codestream = (unsigned char*) malloc (sample->sample_size-8); // Skipping JP2C marker

    fseek(file,sample->offset+8,SEEK_SET);

    fread(frame_codestream,sample->sample_size-8,1, file);  // Assuming that jp and ftyp markers size do

    sprintf(outfilename,"%s_%05d.j2k",argv[2],snum);

    outfile = fopen(outfilename, "wb");

    if (!outfile) {

      fprintf(stderr, "failed to open %s for writing\n",outfilename);

      return 1;

    }

    fwrite(frame_codestream,sample->sample_size-8,1,outfile);

    fclose(outfile);

    free(frame_codestream);

    }

  fclose(file);

  fprintf(stdout, "%d frames correctly extracted\n", snum);

	/* free remaining structures */

	if(dinfo) {

		mj2_destroy_decompress((opj_mj2_t*)dinfo->mj2_handle);

	}

  return 0;

}