80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
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#include <stdio.h>
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#include <malloc.h>
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#include <setjmp.h>
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#include "mj2.h"
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//MEMORY LEAK
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#ifdef _DEBUG
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#define _CRTDBG_MAP_ALLOC
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#include <stdlib.h> // Must be included first
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#include <crtdbg.h>
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#endif
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//MEM
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jmp_buf j2k_error;
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int main(int argc, char *argv[]) {
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unsigned int tnum, snum;
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mj2_movie_t movie;
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mj2_tk_t *track;
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mj2_sample_t *sample;
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unsigned char* frame_codestream;
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FILE *file, *outfile;
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char outfilename[50];
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if (argc != 3) {
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printf("Bad syntax: Usage: MJ2_extractor mj2filename output_location\n");
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printf("Example: MJ2_extractor foreman.mj2 output/foreman\n");
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return 1;
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}
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file = fopen(argv[1], "rb");
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if (!file) {
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fprintf(stderr, "failed to open %s for reading\n", argv[1]);
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return 1;
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}
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if (mj2_read_struct(file, &movie)) // Creating the movie structure
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return 1;
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// Decode first video track
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tnum = 0;
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while (movie.tk[tnum].track_type != 0)
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tnum ++;
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track = &movie.tk[tnum];
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fprintf(stdout,"Extracting %d frames from file...\n",track->num_samples);
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for (snum=0; snum < track->num_samples; snum++)
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{
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sample = &track->sample[snum];
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frame_codestream = (unsigned char*) malloc (sample->sample_size-8); // Skipping JP2C marker
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fseek(file,sample->offset+8,SEEK_SET);
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fread(frame_codestream,sample->sample_size-8,1, file); // Assuming that jp and ftyp markers size do
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sprintf(outfilename,"%s_%d.j2k",argv[2],snum);
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outfile = fopen(outfilename, "wb");
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if (!outfile) {
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fprintf(stderr, "failed to open %s for writing\n",outfilename);
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return 1;
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}
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fwrite(frame_codestream,sample->sample_size-8,1,outfile);
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fclose(outfile);
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free(frame_codestream);
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}
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fclose(file);
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fprintf(stdout, "%d frames correctly extracted\n", snum);
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mj2_memory_free(&movie);
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//MEMORY LEAK
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#ifdef _DEBUG
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_CrtDumpMemoryLeaks();
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#endif
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//MEM
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return 0;
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}
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