209 lines
6.8 KiB
C
209 lines
6.8 KiB
C
/*
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* $Id: jp2k_decoder.c 53 2011-05-09 16:55:39Z kaori $
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*
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* Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2011, Professor Benoit Macq
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* Copyright (c) 2010-2011, Kaori Hagihara
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "jp2k_decoder.h"
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#include "openjpeg.h"
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void error_callback(const char *msg, void *client_data);
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void warning_callback(const char *msg, void *client_data);
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void info_callback(const char *msg, void *client_data);
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Byte_t * imagetopnm(opj_image_t *image, ihdrbox_param_t **ihdrbox);
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Byte_t * j2k_to_pnm( Byte_t *j2kstream, Byte8_t j2klen, ihdrbox_param_t **ihdrbox)
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{
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Byte_t *pnmstream = NULL;
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opj_dparameters_t parameters; /* decompression parameters */
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opj_event_mgr_t event_mgr; /* event manager */
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opj_image_t *image = NULL;
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opj_dinfo_t* dinfo = NULL; /* handle to a decompressor */
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opj_cio_t *cio = NULL;
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/* configure the event callbacks (not required) */
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memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
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event_mgr.error_handler = error_callback;
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event_mgr.warning_handler = warning_callback;
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event_mgr.info_handler = info_callback;
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/* set decoding parameters to default values */
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opj_set_default_decoder_parameters(¶meters);
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/* decode the code-stream */
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/* ---------------------- */
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/* JPEG-2000 codestream */
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/* get a decoder handle */
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dinfo = opj_create_decompress( CODEC_J2K);
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/* catch events using our callbacks and give a local context */
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opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);
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/* setup the decoder decoding parameters using user parameters */
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opj_setup_decoder(dinfo, ¶meters);
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/* open a byte stream */
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cio = opj_cio_open((opj_common_ptr)dinfo, j2kstream, j2klen);
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/* decode the stream and fill the image structure */
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image = opj_decode(dinfo, cio);
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fprintf(stderr, "image is decoded!\n");
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if(!image) {
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fprintf(stderr, "ERROR -> jp2_to_image: failed to decode image!\n");
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opj_destroy_decompress(dinfo);
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opj_cio_close(cio);
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return NULL;
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}
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/* close the byte stream */
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opj_cio_close(cio);
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/* create output image */
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/* ------------------- */
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if( (pnmstream = imagetopnm( image, ihdrbox))==NULL)
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fprintf( stderr, "PNM image not generated\n");
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/* free remaining structures */
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if(dinfo) {
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opj_destroy_decompress(dinfo);
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}
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/* free image data structure */
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opj_image_destroy(image);
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return pnmstream;
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}
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/**
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sample error callback expecting a FILE* client object
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*/
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void error_callback(const char *msg, void *client_data) {
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FILE *stream = (FILE*)client_data;
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fprintf(stream, "[ERROR] %s", msg);
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}
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/**
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sample warning callback expecting a FILE* client object
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*/
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void warning_callback(const char *msg, void *client_data) {
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FILE *stream = (FILE*)client_data;
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fprintf(stream, "[WARNING] %s", msg);
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}
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/**
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sample debug callback expecting no client object
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*/
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void info_callback(const char *msg, void *client_data) {
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(void)client_data;
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// fprintf(stdout, "[INFO] %s", msg);
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}
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Byte_t * imagetopnm(opj_image_t *image, ihdrbox_param_t **ihdrbox)
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{
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int adjustR, adjustG=0, adjustB=0;
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int datasize;
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Byte_t *pix=NULL, *ptr=NULL;
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int i;
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if(*ihdrbox){
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if( (*ihdrbox)->nc != image->numcomps)
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fprintf( stderr, "Exception: num of components not identical, codestream: %d, ihdrbox: %d\n", image->numcomps, (*ihdrbox)->nc);
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if( (*ihdrbox)->width != image->comps[0].w)
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(*ihdrbox)->width = image->comps[0].w;
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if( (*ihdrbox)->height != image->comps[0].h)
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(*ihdrbox)->height = image->comps[0].h;
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if( (*ihdrbox)->bpc != image->comps[0].prec)
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fprintf( stderr, "Exception: bits per component not identical, codestream: %d, ihdrbox: %d\n", image->comps[0].prec, (*ihdrbox)->bpc);
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}
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else{
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*ihdrbox = (ihdrbox_param_t *)malloc( sizeof(ihdrbox_param_t));
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(*ihdrbox)->width = image->comps[0].w;
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(*ihdrbox)->height = image->comps[0].h;
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(*ihdrbox)->bpc = image->comps[0].prec;
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(*ihdrbox)->nc = image->numcomps;
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}
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datasize = (image->numcomps)*(image->comps[0].w)*(image->comps[0].h);
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if (image->comps[0].prec > 8) {
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adjustR = image->comps[0].prec - 8;
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printf("PNM CONVERSION: Truncating component 0 from %d bits to 8 bits\n", image->comps[0].prec);
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}
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else
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adjustR = 0;
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if( image->numcomps == 3){
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if (image->comps[1].prec > 8) {
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adjustG = image->comps[1].prec - 8;
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printf("PNM CONVERSION: Truncating component 1 from %d bits to 8 bits\n", image->comps[1].prec);
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}
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else
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adjustG = 0;
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if (image->comps[2].prec > 8) {
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adjustB = image->comps[2].prec - 8;
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printf("PNM CONVERSION: Truncating component 2 from %d bits to 8 bits\n", image->comps[2].prec);
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}
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else
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adjustB = 0;
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}
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pix = (Byte_t *)malloc( datasize);
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ptr = pix;
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for( i = 0; i < image->comps[0].w * image->comps[0].h; i++){
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int r, g, b;
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r = image->comps[0].data[i];
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r += (image->comps[0].sgnd ? 1 << (image->comps[0].prec - 1) : 0);
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// if( adjustR > 0)
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*(ptr++) = (Byte_t) ((r >> adjustR)+((r >> (adjustR-1))%2));
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if( image->numcomps == 3){
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g = image->comps[1].data[i];
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g += (image->comps[1].sgnd ? 1 << (image->comps[1].prec - 1) : 0);
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*(ptr++) = (Byte_t) ((g >> adjustG)+((g >> (adjustG-1))%2));
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b = image->comps[2].data[i];
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b += (image->comps[2].sgnd ? 1 << (image->comps[2].prec - 1) : 0);
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*(ptr++) = (Byte_t) ((b >> adjustB)+((b >> (adjustB-1))%2));
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}
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}
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return pix;
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}
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