void dec_mct(type_image *img) {
if(img->use_mct == 1) {
// lossless decoder
if(img->wavelet_type == 0) {
color_decoder_lossless(img);
}
else { //lossy decoder
color_decoder_lossy(img);
}
} else if (img->use_part2_mct == 1) {
decode_klt(img);
} else {
if(img->sign == UNSIGNED) {
idc_level_shifting(img);
}
}
}
/**
* @brief Main decoder function. It all starts here.
* Input parameters:
* 1) input JPEG 2000 image
*
* @return 0 on success
*/
int main(int argc, char **argv)
{
// println_start(INFO);
type_image *img = (type_image *)malloc(sizeof(type_image));
memset(img, 0, sizeof(type_image));
if((parse_args(argc, argv, img) == ERROR) || (check_args_dec(img) == ERROR))
{
fprintf(stderr, "Error occurred while parsing arguments.\n");
fprintf(stdout, "%s", help);
return 1;
}
type_parameters *param = (type_parameters*)malloc(sizeof(type_parameters));
if((parse_config(img->conf_file, param) == ERROR) || (check_config(param) == ERROR)) {
fprintf(stderr, "Error occurred while parsing configuration file.\n");
fprintf(stdout, "%s", help);
return 1;
}
init_device(param);
FILE *fsrc = fopen(img->in_file, "rb");
if (!fsrc) {
fprintf(stderr, "Error, failed to open %s for reading\n", img->in_file);
return 1;
}
type_tile *tile;
int i;
if(strstr(img->in_file, ".jp2") != NULL) {
println(INFO, "It's a JP2 file");
//parse the JP2 boxes
jp2_parse_boxes(fsrc, img);
fclose(fsrc);
// Do decoding for all tiles
for(i = 0; i < img->num_tiles; i++) {
tile = &(img->tile[i]);
/* Decode data */
decode_tile(tile);
/* Dequantize data */
dequantize_tile(tile);
/* Do inverse wavelet transform */
iwt(tile);
}
if(img->use_mct == 1) {
// lossless decoder
if(img->wavelet_type == 0) {
color_decoder_lossless(img);
}
else { //lossy decoder
color_decoder_lossy(img);
}
} else if (img->use_part2_mct == 1) {
decode_klt(img);
} else {
if(img->sign == UNSIGNED) {
idc_level_shifting(img);
}
}
}
else {//It is not a JP2 file.
type_buffer *src_buff = (type_buffer *) malloc(sizeof(type_buffer));
init_dec_buffer(fsrc, src_buff);
fclose(fsrc);
decode_codestream(src_buff, img);
// get_next_box(fsrc);
// Do decoding for all tiles
for(i = 0; i < img->num_tiles; i++) {
tile = &(img->tile[i]);
/* Decode data */
decode_tile(tile);
/* Dequantize data */
dequantize_tile(tile);
/* Do inverse wavelet transform */
iwt(tile);
}
if(img->use_mct == 1) {
// lossless decoder
if(img->wavelet_type == 0) {
color_decoder_lossless(img);
}
else { //lossy decoder
color_decoder_lossy(img);
}
} else if (img->use_part2_mct == 1) {
decode_klt(img);
} else {
if(img->sign == UNSIGNED) {
idc_level_shifting(img);
}
}
}
save_image(img);
}
