openjpeg/libopenjpeg/openjpeg.c

/*
 * Copyright (c) 2005, Hervé Drolon, FreeImage Team
 * 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 "opj_includes.h"

const char * opj_version() {
    return OPENJPEG_VERSION;
}

opj_dinfo_t* opj_create_decompress(OPJ_CODEC_FORMAT format) {
	opj_dinfo_t *dinfo = (opj_dinfo_t*)opj_malloc(sizeof(opj_dinfo_t));
	if(!dinfo) return NULL;
	dinfo->is_decompressor = true;
	switch(format) {
		case CODEC_J2K:
		case CODEC_JPT:
			/* get a J2K decoder handle */
			dinfo->j2k_handle = (void*)j2k_create_decompress((opj_common_ptr)dinfo);
			if(!dinfo->j2k_handle) {
				opj_free(dinfo);
				return NULL;
			}
			break;
		case CODEC_JP2:
			/* get a JP2 decoder handle */
			dinfo->jp2_handle = (void*)jp2_create_decompress((opj_common_ptr)dinfo);
			if(!dinfo->jp2_handle) {
				opj_free(dinfo);
				return NULL;
			}
			break;
		default:
			opj_free(dinfo);
			return NULL;
	}

	dinfo->codec_format = format;

	return dinfo;
}

void opj_destroy_decompress(opj_dinfo_t *dinfo) {
	if(dinfo) {
		/* destroy the codec */
		switch(dinfo->codec_format) {
			case CODEC_J2K:
			case CODEC_JPT:
				j2k_destroy_decompress((opj_j2k_t*)dinfo->j2k_handle);
				break;
			case CODEC_JP2:
				jp2_destroy_decompress((opj_jp2_t*)dinfo->jp2_handle);
				break;
		}
		/* destroy the decompressor */
		opj_free(dinfo);
	}
}

void opj_set_default_decoder_parameters(opj_dparameters_t *parameters) {
	if(parameters) {
		memset(parameters, 0, sizeof(opj_dparameters_t));
		/* default decoding parameters */
		parameters->cp_layer = 0;
		parameters->cp_reduce = 0;

		parameters->decod_format = -1;
		parameters->cod_format = -1;
	}
}

void opj_setup_decoder(opj_dinfo_t *dinfo, opj_dparameters_t *parameters) {
	if(dinfo && parameters) {
		switch(dinfo->codec_format) {
			case CODEC_J2K:
			case CODEC_JPT:
				j2k_setup_decoder((opj_j2k_t*)dinfo->j2k_handle, parameters);
				break;
			case CODEC_JP2:
				jp2_setup_decoder((opj_jp2_t*)dinfo->jp2_handle, parameters);
				break;
		}
	}
}

opj_image_t* opj_decode(opj_dinfo_t *dinfo, opj_cio_t *cio) {
	if(dinfo && cio) {
		switch(dinfo->codec_format) {
			case CODEC_J2K:
				return j2k_decode((opj_j2k_t*)dinfo->j2k_handle, cio);
			case CODEC_JPT:
				return j2k_decode_jpt_stream((opj_j2k_t*)dinfo->j2k_handle, cio);
			case CODEC_JP2:
				return jp2_decode((opj_jp2_t*)dinfo->jp2_handle, cio);
		}
	}

	return NULL;
}

opj_cinfo_t* opj_create_compress(OPJ_CODEC_FORMAT format) {
	opj_cinfo_t *cinfo = (opj_cinfo_t*)opj_malloc(sizeof(opj_cinfo_t));
	if(!cinfo) return NULL;
	cinfo->is_decompressor = false;
	switch(format) {
		case CODEC_J2K:
			/* get a J2K coder handle */
			cinfo->j2k_handle = (void*)j2k_create_compress((opj_common_ptr)cinfo);
			if(!cinfo->j2k_handle) {
				opj_free(cinfo);
				return NULL;
			}
			break;
		case CODEC_JP2:
			/* get a JP2 coder handle */
			cinfo->jp2_handle = (void*)jp2_create_compress((opj_common_ptr)cinfo);
			if(!cinfo->jp2_handle) {
				opj_free(cinfo);
				return NULL;
			}
			break;
		default:
			opj_free(cinfo);
			return NULL;
	}

	cinfo->codec_format = format;

	return cinfo;
}

void opj_destroy_compress(opj_cinfo_t *cinfo) {
	if(cinfo) {
		/* destroy the codec */
		switch(cinfo->codec_format) {
			case CODEC_J2K:
				j2k_destroy_decompress((opj_j2k_t*)cinfo->j2k_handle);
				break;
			case CODEC_JP2:
				jp2_destroy_decompress((opj_jp2_t*)cinfo->jp2_handle);
				break;
		}
		/* destroy the decompressor */
		opj_free(cinfo);
	}
}

void opj_set_default_encoder_parameters(opj_cparameters_t *parameters) {
	if(parameters) {
		memset(parameters, 0, sizeof(opj_cparameters_t));
		/* default coding parameters */
		parameters->numresolution = 6;
		parameters->cblockw_init = 64;
		parameters->cblockh_init = 64;
		parameters->prog_order = LRCP;
		parameters->roi_compno = -1;		/* no ROI */
		parameters->subsampling_dx = 1;
		parameters->subsampling_dy = 1;

		parameters->decod_format = -1;
		parameters->cod_format = -1;
	}
}

void opj_setup_encoder(opj_cinfo_t *cinfo, opj_cparameters_t *parameters, opj_image_t *image) {
	if(cinfo && parameters && image) {
		switch(cinfo->codec_format) {
			case CODEC_J2K:
				j2k_setup_encoder((opj_j2k_t*)cinfo->j2k_handle, parameters, image);
				break;
			case CODEC_JP2:
				jp2_setup_encoder((opj_jp2_t*)cinfo->jp2_handle, parameters, image);
				break;
		}
	}
}

bool opj_encode(opj_cinfo_t *cinfo, opj_cio_t *cio, opj_image_t *image, char *index) {
	if(cinfo && cio && image) {
		switch(cinfo->codec_format) {
			case CODEC_J2K:
				return j2k_encode((opj_j2k_t*)cinfo->j2k_handle, cio, image, index);
			case CODEC_JP2:
				return jp2_encode((opj_jp2_t*)cinfo->jp2_handle, cio, image, index);
		}
	}

	return false;
}