/*
* Copyright (c) 2003-2004, François-Olivier Devaux
* Copyright (c) 2002-2004,  Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "openjpeg.h"
#include "j2k_lib.h"
#include "j2k.h"
#include "jp2.h"
#include "mj2.h"
#include "mj2_convert.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[]) {
	mj2_dparameters_t mj2_parameters;			/* decompression parameters */
	opj_dinfo_t* dinfo; 
	opj_event_mgr_t event_mgr;		/* event manager */	
	opj_cio_t *cio = NULL;
  unsigned int tnum, snum;
  opj_mj2_t *movie;
  mj2_tk_t *track;
  mj2_sample_t *sample;
  unsigned char* frame_codestream;
  FILE *file, *outfile;
  char outfilename[50];
  opj_image_t *img = NULL;
	unsigned int max_codstrm_size = 0;
	double total_time = 0;
	unsigned int numframes = 0;
			
  if (argc != 3) {
    printf("Bad syntax: Usage: mj2_to_frames inputfile.mj2 outputfile.yuv\n"); 
    printf("Example: MJ2_decoder foreman.mj2 foreman.yuv\n");
    return 1;
  }
  
  file = fopen(argv[1], "rb");
  
  if (!file) {
    fprintf(stderr, "failed to open %s for reading\n", argv[1]);
    return 1;
  }
	
  // Checking output file
  outfile = fopen(argv[2], "w");
  if (!file) {
    fprintf(stderr, "failed to open %s for writing\n", argv[2]);
    return 1;
  }
  fclose(outfile);
	
	/*
	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 = NULL;
	
	/* get a MJ2 decompressor handle */
	dinfo = mj2_create_decompress();
	movie = dinfo->mj2_handle;
	
	/* catch events using our callbacks and give a local context */
	opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);		

	/* set J2K decoding parameters to default values */
	opj_set_default_decoder_parameters(&mj2_parameters.j2k_parameters);
	
	/* setup the decoder decoding parameters using user parameters */
	mj2_setup_decoder(dinfo->mj2_handle, &mj2_parameters);
			
  if (mj2_read_struct(file, movie)) // Creating the movie structure
    return 1;	
	
  // Decode first video track 
	for (tnum=0; tnum < (unsigned int)(movie->num_htk + movie->num_stk + movie->num_vtk); tnum++) {
		if (movie->tk[tnum].track_type == 0) 
			break;
	}
	
	if (movie->tk[tnum].track_type != 0) {
		printf("Error. Movie does not contain any video track\n");
		return 1;
	}
	
  track = &movie->tk[tnum];
	
  // Output info on first video tracl
  fprintf(stdout,"The first video track contains %d frames.\nWidth: %d, Height: %d \n\n",
    track->num_samples, track->w, track->h);
	
	max_codstrm_size = track->sample[0].sample_size-8;
	frame_codestream = (unsigned char*) malloc(max_codstrm_size * sizeof(unsigned char)); 

	numframes = track->num_samples;
	
  for (snum=0; snum < numframes; snum++)
  {
		double init_time = opj_clock();
		double elapsed_time;

    sample = &track->sample[snum];
		if (sample->sample_size-8 > max_codstrm_size) {
			max_codstrm_size =  sample->sample_size-8;
			if ((frame_codestream = realloc(frame_codestream, max_codstrm_size)) == NULL) {
				printf("Error reallocation memory\n");
				return 1;
			}; 		
		}
    fseek(file,sample->offset+8,SEEK_SET);
    fread(frame_codestream, sample->sample_size-8, 1, file);  // Assuming that jp and ftyp markers size do
		
		/* open a byte stream */
		cio = opj_cio_open((opj_common_ptr)dinfo, frame_codestream, sample->sample_size-8);
		
		img = opj_decode(dinfo, cio); // Decode J2K to image
				
    if (((img->numcomps == 3) && (img->comps[0].dx == img->comps[1].dx / 2) 
      && (img->comps[0].dx == img->comps[2].dx / 2 ) && (img->comps[0].dx == 1)) 
      || (img->numcomps == 1)) {
      
      if (!imagetoyuv(img, argv[2]))	// Convert image to YUV
				return 1;
    }
    else if ((img->numcomps == 3) && 
      (img->comps[0].dx == 1) && (img->comps[1].dx == 1)&&
      (img->comps[2].dx == 1))// If YUV 4:4:4 input --> to bmp
    {
      fprintf(stdout,"The frames will be output in a bmp format (output_1.bmp, ...)\n");
      sprintf(outfilename,"output_%d.bmp",snum);
      if (imagetobmp(img, outfilename))	// Convert image to YUV
				return 1;
      
    }
    else {
      fprintf(stdout,"Image component dimensions are unknown. Unable to output image\n");
      fprintf(stdout,"The frames will be output in a j2k file (output_1.j2k, ...)\n");
			
      sprintf(outfilename,"output_%d.j2k",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);
    }
		/* close the byte stream */
		opj_cio_close(cio);	
		/* free image data structure */
		opj_image_destroy(img);
		elapsed_time = opj_clock()-init_time;
		fprintf(stderr, "Frame number %d/%d decoded in %.2f mseconds\n", snum + 1, numframes, elapsed_time*1000);
		total_time += elapsed_time;

  }
	
	free(frame_codestream);	
  fclose(file);	

	/* free remaining structures */
	if(dinfo) {
		mj2_destroy_decompress((opj_mj2_t*)dinfo->mj2_handle);
	}
	free(dinfo);
	
	fprintf(stdout, "%d frame(s) correctly decompressed\n", snum);
	fprintf(stdout,"Total decoding time: %.2f seconds (%.1f fps)\n", total_time, (float)numframes/total_time);
		
  return 0;
}
