openjpeg/tests/unit/testempty2.c

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2012-04-06 15:07:01 +02:00
/*
* Copyright (c) 2012, Mathieu Malaterre
* 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 <openjpeg.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define J2K_CFMT 0
void error_callback(const char *msg, void *v) {
assert(0);
}
void warning_callback(const char *msg, void *v) {
puts(msg);
}
void info_callback(const char *msg, void *v) {
puts(msg);
}
int main(int argc, char *argv[])
{
const char * v = opj_version();
puts(v);
const OPJ_COLOR_SPACE color_space = CLRSPC_GRAY;
int numcomps = 1;
int i;
int image_width = 256;
int image_height = 256;
opj_cparameters_t parameters;
opj_set_default_encoder_parameters(&parameters);
parameters.cod_format = J2K_CFMT;
int subsampling_dx = parameters.subsampling_dx;
int subsampling_dy = parameters.subsampling_dy;
opj_image_cmptparm_t cmptparm;
cmptparm.prec = 8;
cmptparm.bpp = 8;
cmptparm.sgnd = 0;
cmptparm.dx = subsampling_dx;
cmptparm.dy = subsampling_dy;
cmptparm.w = image_width;
cmptparm.h = image_height;
opj_image_t *image = opj_image_create(numcomps, &cmptparm, color_space);
assert( image );
for (i = 0; i < image_width * image_height; i++)
{
int compno;
for(compno = 0; compno < numcomps; compno++)
{
image->comps[compno].data[i] = 0;
}
}
opj_event_mgr_t event_mgr;
event_mgr.error_handler = error_callback;
event_mgr.warning_handler = warning_callback;
event_mgr.info_handler = info_callback;
opj_cinfo_t* cinfo = opj_create_compress(CODEC_J2K);
opj_set_event_mgr((opj_common_ptr)cinfo, &event_mgr, stderr);
opj_setup_encoder(cinfo, &parameters, image);
opj_cio_t *cio = opj_cio_open((opj_common_ptr)cinfo, NULL, 0);
assert( cio );
opj_bool bSuccess = opj_encode(cinfo, cio, image, NULL);
assert( bSuccess );
size_t codestream_length = cio_tell(cio);
assert( codestream_length );
const char outputfile[] = "testempty2.j2k";
strcpy(parameters.outfile, outputfile);
FILE *f = fopen(parameters.outfile, "wb");
assert( f );
fwrite(cio->buffer, 1, codestream_length, f);
fclose(f);
opj_cio_close(cio);
opj_destroy_compress(cinfo);
opj_image_destroy(image);
/* read back the generated file */
size_t file_length;
FILE *fsrc = fopen(outputfile, "rb");
assert( fsrc );
fseek(fsrc, 0, SEEK_END);
file_length = ftell(fsrc);
fseek(fsrc, 0, SEEK_SET);
unsigned char *src = (unsigned char *) malloc(file_length);
if (fread(src, 1, file_length, fsrc) != file_length)
{
free(src);
fclose(fsrc);
return 1;
}
fclose(fsrc);
opj_dinfo_t* dinfo = NULL; /* handle to a decompressor */
dinfo = opj_create_decompress(CODEC_J2K);
opj_set_event_mgr((opj_common_ptr)dinfo, &event_mgr, stderr);
opj_dparameters_t dparameters;
opj_set_default_decoder_parameters(&dparameters);
opj_setup_decoder(dinfo, &dparameters);
cio = opj_cio_open((opj_common_ptr)dinfo, src, file_length);
image = opj_decode(dinfo, cio);
if(!image) {
opj_destroy_decompress(dinfo);
opj_cio_close(cio);
return 1;
}
opj_destroy_decompress(dinfo);
opj_cio_close(cio);
puts( "end" );
return 0;
}