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#include <stdio.h>
#include <malloc.h>
#include <setjmp.h>
#include "mj2.h"
#include "mj2_convert.h"
#include <openjpeg.h>
//MEMORY LEAK
#ifdef _DEBUG
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h> // Must be included first
#include <crtdbg.h>
#endif
//MEM
jmp_buf j2k_error;
int main(int argc, char *argv[]) {
unsigned int tnum, snum;
mj2_movie_t movie;
mj2_tk_t *track;
mj2_sample_t *sample;
unsigned char* frame_codestream;
FILE *file, *outfile;
char outfilename[50];
j2k_image_t img;
j2k_cp_t cp;
int i;
cp.layer=0;
cp.reduce=0;
if (argc != 3) {
printf("Bad syntax: Usage: MJ2_decoder 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);
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];
// 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);
for (snum=0; snum < track->num_samples; snum++)
{
fprintf(stdout,"Frame %d: ",snum+1);
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
if (!j2k_decode(frame_codestream, sample->sample_size-8, &img, &cp)) // Decode J2K to image
return 1;
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, &cp, 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, &cp, 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);
}
for (i=0; i<img.numcomps; i++)
free(img.comps[i].data);
j2k_dec_release();
free(frame_codestream);
}
fclose(file);
fprintf(stdout, "%d frame(s) correctly extracted\n", snum);
mj2_memory_free(&movie);
//MEMORY LEAK
#ifdef _DEBUG
_CrtDumpMemoryLeaks();
#endif
//MEM
return 0;
}
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