forked from KolibriOS/kolibrios
1090 lines
28 KiB
C
1090 lines
28 KiB
C
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/*
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* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2007, Professor Benoit Macq
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* Copyright (c) 2001-2003, David Janssens
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* Copyright (c) 2002-2003, Yannick Verschueren
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* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
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* Copyright (c) 2005, Herve Drolon, FreeImage Team
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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 "opj_includes.h"
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/** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */
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/*@{*/
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/** @name Local static functions */
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/*@{*/
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/**
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Read box headers
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@param cinfo Codec context info
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@param cio Input stream
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@param box
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box);
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/*static void jp2_write_url(opj_cio_t *cio, char *Idx_file);*/
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/**
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Read the IHDR box - Image Header box
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@param jp2 JP2 handle
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@param cio Input buffer stream
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio);
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static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio);
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static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio);
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static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio);
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static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio);
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/**
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Write the FTYP box - File type box
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@param jp2 JP2 handle
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@param cio Output buffer stream
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*/
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static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio);
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/**
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Read the FTYP box - File type box
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@param jp2 JP2 handle
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@param cio Input buffer stream
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio);
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static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info);
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static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset);
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static void jp2_write_jp(opj_cio_t *cio);
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/**
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Read the JP box - JPEG 2000 signature
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@param jp2 JP2 handle
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@param cio Input buffer stream
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio);
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/**
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Decode the structure of a JP2 file
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@param jp2 JP2 handle
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@param cio Input buffer stream
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@param color Collector for profile, cdef and pclr data
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio,
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opj_jp2_color_t *color);
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/**
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Apply collected palette data
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@param color Collector for profile, cdef and pclr data
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@param image
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*/
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static void jp2_apply_pclr(opj_jp2_color_t *color, opj_image_t *image);
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/**
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Collect palette data
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@param jp2 JP2 handle
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@param cio Input buffer stream
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@param box
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@param color Collector for profile, cdef and pclr data
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_pclr(opj_jp2_t *jp2, opj_cio_t *cio,
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opj_jp2_box_t *box, opj_jp2_color_t *color);
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/**
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Collect component mapping data
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@param jp2 JP2 handle
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@param cio Input buffer stream
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@param box
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@param color Collector for profile, cdef and pclr data
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_cmap(opj_jp2_t *jp2, opj_cio_t *cio,
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opj_jp2_box_t *box, opj_jp2_color_t *color);
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/**
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Collect colour specification data
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@param jp2 JP2 handle
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@param cio Input buffer stream
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@param box
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@param color Collector for profile, cdef and pclr data
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@return Returns true if successful, returns false otherwise
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*/
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static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio,
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opj_jp2_box_t *box, opj_jp2_color_t *color);
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/*@}*/
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/*@}*/
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/* ----------------------------------------------------------------------- */
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static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box) {
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box->init_pos = cio_tell(cio);
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box->length = cio_read(cio, 4);
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box->type = cio_read(cio, 4);
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if (box->length == 1) {
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if (cio_read(cio, 4) != 0) {
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opj_event_msg(cinfo, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n");
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return false;
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}
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box->length = cio_read(cio, 4);
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if (box->length == 0)
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box->length = cio_numbytesleft(cio) + 12;
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}
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else if (box->length == 0) {
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box->length = cio_numbytesleft(cio) + 8;
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}
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return true;
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}
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#if 0
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static void jp2_write_url(opj_cio_t *cio, char *Idx_file) {
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unsigned int i;
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opj_jp2_box_t box;
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box.init_pos = cio_tell(cio);
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cio_skip(cio, 4);
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cio_write(cio, JP2_URL, 4); /* DBTL */
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cio_write(cio, 0, 1); /* VERS */
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cio_write(cio, 0, 3); /* FLAG */
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if(Idx_file) {
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for (i = 0; i < strlen(Idx_file); i++) {
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cio_write(cio, Idx_file[i], 1);
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}
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}
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box.length = cio_tell(cio) - box.init_pos;
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cio_seek(cio, box.init_pos);
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cio_write(cio, box.length, 4); /* L */
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cio_seek(cio, box.init_pos + box.length);
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}
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#endif
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static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) {
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opj_jp2_box_t box;
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opj_common_ptr cinfo = jp2->cinfo;
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jp2_read_boxhdr(cinfo, cio, &box);
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if (JP2_IHDR != box.type) {
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opj_event_msg(cinfo, EVT_ERROR, "Expected IHDR Marker\n");
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return false;
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}
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jp2->h = cio_read(cio, 4); /* HEIGHT */
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jp2->w = cio_read(cio, 4); /* WIDTH */
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jp2->numcomps = cio_read(cio, 2); /* NC */
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jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
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jp2->bpc = cio_read(cio, 1); /* BPC */
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jp2->C = cio_read(cio, 1); /* C */
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jp2->UnkC = cio_read(cio, 1); /* UnkC */
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jp2->IPR = cio_read(cio, 1); /* IPR */
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if (cio_tell(cio) - box.init_pos != box.length) {
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opj_event_msg(cinfo, EVT_ERROR, "Error with IHDR Box\n");
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return false;
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}
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return true;
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}
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static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) {
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opj_jp2_box_t box;
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box.init_pos = cio_tell(cio);
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cio_skip(cio, 4);
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cio_write(cio, JP2_IHDR, 4); /* IHDR */
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cio_write(cio, jp2->h, 4); /* HEIGHT */
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cio_write(cio, jp2->w, 4); /* WIDTH */
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cio_write(cio, jp2->numcomps, 2); /* NC */
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cio_write(cio, jp2->bpc, 1); /* BPC */
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cio_write(cio, jp2->C, 1); /* C : Always 7 */
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cio_write(cio, jp2->UnkC, 1); /* UnkC, colorspace unknown */
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cio_write(cio, jp2->IPR, 1); /* IPR, no intellectual property */
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box.length = cio_tell(cio) - box.init_pos;
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cio_seek(cio, box.init_pos);
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cio_write(cio, box.length, 4); /* L */
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cio_seek(cio, box.init_pos + box.length);
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}
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static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) {
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unsigned int i;
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opj_jp2_box_t box;
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box.init_pos = cio_tell(cio);
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cio_skip(cio, 4);
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cio_write(cio, JP2_BPCC, 4); /* BPCC */
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for (i = 0; i < jp2->numcomps; i++) {
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cio_write(cio, jp2->comps[i].bpcc, 1);
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}
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box.length = cio_tell(cio) - box.init_pos;
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cio_seek(cio, box.init_pos);
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cio_write(cio, box.length, 4); /* L */
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cio_seek(cio, box.init_pos + box.length);
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}
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static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) {
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unsigned int i;
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opj_jp2_box_t box;
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opj_common_ptr cinfo = jp2->cinfo;
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jp2_read_boxhdr(cinfo, cio, &box);
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if (JP2_BPCC != box.type) {
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opj_event_msg(cinfo, EVT_ERROR, "Expected BPCC Marker\n");
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return false;
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}
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for (i = 0; i < jp2->numcomps; i++) {
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jp2->comps[i].bpcc = cio_read(cio, 1);
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}
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if (cio_tell(cio) - box.init_pos != box.length) {
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opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n");
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return false;
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}
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return true;
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}
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static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio) {
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opj_jp2_box_t box;
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box.init_pos = cio_tell(cio);
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cio_skip(cio, 4);
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cio_write(cio, JP2_COLR, 4); /* COLR */
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cio_write(cio, jp2->meth, 1); /* METH */
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cio_write(cio, jp2->precedence, 1); /* PRECEDENCE */
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cio_write(cio, jp2->approx, 1); /* APPROX */
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if (jp2->meth == 1) {
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cio_write(cio, jp2->enumcs, 4); /* EnumCS */
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} else {
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cio_write(cio, 0, 1); /* PROFILE (??) */
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}
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box.length = cio_tell(cio) - box.init_pos;
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cio_seek(cio, box.init_pos);
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cio_write(cio, box.length, 4); /* L */
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cio_seek(cio, box.init_pos + box.length);
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}
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static void jp2_free_pclr(opj_jp2_color_t *color)
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{
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opj_free(color->jp2_pclr->channel_sign);
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opj_free(color->jp2_pclr->channel_size);
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opj_free(color->jp2_pclr->entries);
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if(color->jp2_pclr->cmap) opj_free(color->jp2_pclr->cmap);
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opj_free(color->jp2_pclr); color->jp2_pclr = NULL;
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}
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static void free_color_data(opj_jp2_color_t *color)
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{
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if(color->jp2_pclr)
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{
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jp2_free_pclr(color);
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}
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if(color->jp2_cdef)
|
|||
|
|
{
|
|||
|
|
if(color->jp2_cdef->info) opj_free(color->jp2_cdef->info);
|
|||
|
|
opj_free(color->jp2_cdef);
|
|||
|
|
}
|
|||
|
|
if(color->icc_profile_buf) opj_free(color->icc_profile_buf);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static void jp2_apply_pclr(opj_jp2_color_t *color, opj_image_t *image)
|
|||
|
|
{
|
|||
|
|
opj_image_comp_t *old_comps, *new_comps;
|
|||
|
|
unsigned char *channel_size, *channel_sign;
|
|||
|
|
unsigned int *entries;
|
|||
|
|
opj_jp2_cmap_comp_t *cmap;
|
|||
|
|
int *src, *dst;
|
|||
|
|
unsigned int j, max;
|
|||
|
|
unsigned short i, nr_channels, cmp, pcol;
|
|||
|
|
int k, top_k;
|
|||
|
|
|
|||
|
|
channel_size = color->jp2_pclr->channel_size;
|
|||
|
|
channel_sign = color->jp2_pclr->channel_sign;
|
|||
|
|
entries = color->jp2_pclr->entries;
|
|||
|
|
cmap = color->jp2_pclr->cmap;
|
|||
|
|
nr_channels = color->jp2_pclr->nr_channels;
|
|||
|
|
|
|||
|
|
old_comps = image->comps;
|
|||
|
|
new_comps = (opj_image_comp_t*)
|
|||
|
|
opj_malloc(nr_channels * sizeof(opj_image_comp_t));
|
|||
|
|
|
|||
|
|
for(i = 0; i < nr_channels; ++i)
|
|||
|
|
{
|
|||
|
|
pcol = cmap[i].pcol; cmp = cmap[i].cmp;
|
|||
|
|
|
|||
|
|
new_comps[pcol] = old_comps[cmp];
|
|||
|
|
|
|||
|
|
if(cmap[i].mtyp == 0) /* Direct use */
|
|||
|
|
{
|
|||
|
|
old_comps[cmp].data = NULL; continue;
|
|||
|
|
}
|
|||
|
|
/* Palette mapping: */
|
|||
|
|
new_comps[pcol].data = (int*)
|
|||
|
|
opj_malloc(old_comps[cmp].w * old_comps[cmp].h * sizeof(int));
|
|||
|
|
new_comps[pcol].prec = channel_size[i];
|
|||
|
|
new_comps[pcol].sgnd = channel_sign[i];
|
|||
|
|
}
|
|||
|
|
top_k = color->jp2_pclr->nr_entries - 1;
|
|||
|
|
|
|||
|
|
for(i = 0; i < nr_channels; ++i)
|
|||
|
|
{
|
|||
|
|
/* Direct use: */
|
|||
|
|
if(cmap[i].mtyp == 0) continue;
|
|||
|
|
|
|||
|
|
/* Palette mapping: */
|
|||
|
|
cmp = cmap[i].cmp; pcol = cmap[i].pcol;
|
|||
|
|
src = old_comps[cmp].data;
|
|||
|
|
dst = new_comps[pcol].data;
|
|||
|
|
max = new_comps[pcol].w * new_comps[pcol].h;
|
|||
|
|
|
|||
|
|
for(j = 0; j < max; ++j)
|
|||
|
|
{
|
|||
|
|
/* The index */
|
|||
|
|
if((k = src[j]) < 0) k = 0; else if(k > top_k) k = top_k;
|
|||
|
|
/* The colour */
|
|||
|
|
dst[j] = entries[k * nr_channels + pcol];
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
max = image->numcomps;
|
|||
|
|
for(i = 0; i < max; ++i)
|
|||
|
|
{
|
|||
|
|
if(old_comps[i].data) opj_free(old_comps[i].data);
|
|||
|
|
}
|
|||
|
|
opj_free(old_comps);
|
|||
|
|
image->comps = new_comps;
|
|||
|
|
image->numcomps = nr_channels;
|
|||
|
|
|
|||
|
|
jp2_free_pclr(color);
|
|||
|
|
|
|||
|
|
}/* apply_pclr() */
|
|||
|
|
|
|||
|
|
static bool jp2_read_pclr(opj_jp2_t *jp2, opj_cio_t *cio,
|
|||
|
|
opj_jp2_box_t *box, opj_jp2_color_t *color)
|
|||
|
|
{
|
|||
|
|
opj_jp2_pclr_t *jp2_pclr;
|
|||
|
|
unsigned char *channel_size, *channel_sign;
|
|||
|
|
unsigned int *entries;
|
|||
|
|
unsigned short nr_entries, nr_channels;
|
|||
|
|
unsigned short i, j;
|
|||
|
|
unsigned char uc;
|
|||
|
|
|
|||
|
|
/* Part 1, I.5.3.4: 'There shall be at most one Palette box inside
|
|||
|
|
* a JP2 Header box' :
|
|||
|
|
*/
|
|||
|
|
if(color->jp2_pclr) return false;
|
|||
|
|
|
|||
|
|
nr_entries = cio_read(cio, 2); /* NE */
|
|||
|
|
nr_channels = cio_read(cio, 1);/* NPC */
|
|||
|
|
|
|||
|
|
entries = (unsigned int*)
|
|||
|
|
opj_malloc(nr_channels * nr_entries * sizeof(unsigned int));
|
|||
|
|
channel_size = (unsigned char*)opj_malloc(nr_channels);
|
|||
|
|
channel_sign = (unsigned char*)opj_malloc(nr_channels);
|
|||
|
|
|
|||
|
|
jp2_pclr = (opj_jp2_pclr_t*)opj_malloc(sizeof(opj_jp2_pclr_t));
|
|||
|
|
jp2_pclr->channel_sign = channel_sign;
|
|||
|
|
jp2_pclr->channel_size = channel_size;
|
|||
|
|
jp2_pclr->entries = entries;
|
|||
|
|
jp2_pclr->nr_entries = nr_entries;
|
|||
|
|
jp2_pclr->nr_channels = nr_channels;
|
|||
|
|
jp2_pclr->cmap = NULL;
|
|||
|
|
|
|||
|
|
color->jp2_pclr = jp2_pclr;
|
|||
|
|
|
|||
|
|
for(i = 0; i < nr_channels; ++i)
|
|||
|
|
{
|
|||
|
|
uc = cio_read(cio, 1); /* Bi */
|
|||
|
|
channel_size[i] = (uc & 0x7f) + 1;
|
|||
|
|
channel_sign[i] = (uc & 0x80)?1:0;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
for(j = 0; j < nr_entries; ++j)
|
|||
|
|
{
|
|||
|
|
for(i = 0; i < nr_channels; ++i)
|
|||
|
|
{
|
|||
|
|
/* Cji */
|
|||
|
|
*entries++ = cio_read(cio, channel_size[i]>>3);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}/* jp2_read_pclr() */
|
|||
|
|
|
|||
|
|
static bool jp2_read_cmap(opj_jp2_t *jp2, opj_cio_t *cio,
|
|||
|
|
opj_jp2_box_t *box, opj_jp2_color_t *color)
|
|||
|
|
{
|
|||
|
|
opj_jp2_cmap_comp_t *cmap;
|
|||
|
|
unsigned short i, nr_channels;
|
|||
|
|
|
|||
|
|
/* Need nr_channels: */
|
|||
|
|
if(color->jp2_pclr == NULL) return false;
|
|||
|
|
|
|||
|
|
/* Part 1, I.5.3.5: 'There shall be at most one Component Mapping box
|
|||
|
|
* inside a JP2 Header box' :
|
|||
|
|
*/
|
|||
|
|
if(color->jp2_pclr->cmap) return false;
|
|||
|
|
|
|||
|
|
nr_channels = color->jp2_pclr->nr_channels;
|
|||
|
|
cmap = (opj_jp2_cmap_comp_t*)
|
|||
|
|
opj_malloc(nr_channels * sizeof(opj_jp2_cmap_comp_t));
|
|||
|
|
|
|||
|
|
for(i = 0; i < nr_channels; ++i)
|
|||
|
|
{
|
|||
|
|
cmap[i].cmp = cio_read(cio, 2);
|
|||
|
|
cmap[i].mtyp = cio_read(cio, 1);
|
|||
|
|
cmap[i].pcol = cio_read(cio, 1);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
color->jp2_pclr->cmap = cmap;
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}/* jp2_read_cmap() */
|
|||
|
|
|
|||
|
|
static void jp2_apply_cdef(opj_image_t *image, opj_jp2_color_t *color)
|
|||
|
|
{
|
|||
|
|
opj_jp2_cdef_info_t *info;
|
|||
|
|
int color_space;
|
|||
|
|
unsigned short i, n, cn, typ, asoc, acn;
|
|||
|
|
|
|||
|
|
color_space = image->color_space;
|
|||
|
|
info = color->jp2_cdef->info;
|
|||
|
|
n = color->jp2_cdef->n;
|
|||
|
|
|
|||
|
|
for(i = 0; i < n; ++i)
|
|||
|
|
{
|
|||
|
|
/* WATCH: acn = asoc - 1 ! */
|
|||
|
|
if((asoc = info[i].asoc) == 0) continue;
|
|||
|
|
|
|||
|
|
cn = info[i].cn; typ = info[i].typ; acn = asoc - 1;
|
|||
|
|
|
|||
|
|
if(cn != acn)
|
|||
|
|
{
|
|||
|
|
opj_image_comp_t saved;
|
|||
|
|
|
|||
|
|
memcpy(&saved, &image->comps[cn], sizeof(opj_image_comp_t));
|
|||
|
|
memcpy(&image->comps[cn], &image->comps[acn], sizeof(opj_image_comp_t));
|
|||
|
|
memcpy(&image->comps[acn], &saved, sizeof(opj_image_comp_t));
|
|||
|
|
|
|||
|
|
info[i].asoc = cn + 1;
|
|||
|
|
info[acn].asoc = info[acn].cn + 1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
if(color->jp2_cdef->info) opj_free(color->jp2_cdef->info);
|
|||
|
|
|
|||
|
|
opj_free(color->jp2_cdef); color->jp2_cdef = NULL;
|
|||
|
|
|
|||
|
|
}/* jp2_apply_cdef() */
|
|||
|
|
|
|||
|
|
static bool jp2_read_cdef(opj_jp2_t *jp2, opj_cio_t *cio,
|
|||
|
|
opj_jp2_box_t *box, opj_jp2_color_t *color)
|
|||
|
|
{
|
|||
|
|
opj_jp2_cdef_info_t *info;
|
|||
|
|
unsigned short i, n;
|
|||
|
|
|
|||
|
|
/* Part 1, I.5.3.6: 'The shall be at most one Channel Definition box
|
|||
|
|
* inside a JP2 Header box.'
|
|||
|
|
*/
|
|||
|
|
if(color->jp2_cdef) return false;
|
|||
|
|
|
|||
|
|
if((n = cio_read(cio, 2)) == 0) return false; /* szukw000: FIXME */
|
|||
|
|
|
|||
|
|
info = (opj_jp2_cdef_info_t*)
|
|||
|
|
opj_malloc(n * sizeof(opj_jp2_cdef_info_t));
|
|||
|
|
|
|||
|
|
color->jp2_cdef = (opj_jp2_cdef_t*)opj_malloc(sizeof(opj_jp2_cdef_t));
|
|||
|
|
color->jp2_cdef->info = info;
|
|||
|
|
color->jp2_cdef->n = n;
|
|||
|
|
|
|||
|
|
for(i = 0; i < n; ++i)
|
|||
|
|
{
|
|||
|
|
info[i].cn = cio_read(cio, 2);
|
|||
|
|
info[i].typ = cio_read(cio, 2);
|
|||
|
|
info[i].asoc = cio_read(cio, 2);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
return true;
|
|||
|
|
}/* jp2_read_cdef() */
|
|||
|
|
|
|||
|
|
static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio,
|
|||
|
|
opj_jp2_box_t *box, opj_jp2_color_t *color)
|
|||
|
|
{
|
|||
|
|
int skip_len;
|
|||
|
|
opj_common_ptr cinfo;
|
|||
|
|
|
|||
|
|
/* Part 1, I.5.3.3 : 'A conforming JP2 reader shall ignore all Colour
|
|||
|
|
* Specification boxes after the first.'
|
|||
|
|
*/
|
|||
|
|
if(color->jp2_has_colr) return false;
|
|||
|
|
|
|||
|
|
cinfo = jp2->cinfo;
|
|||
|
|
|
|||
|
|
jp2->meth = cio_read(cio, 1); /* METH */
|
|||
|
|
jp2->precedence = cio_read(cio, 1); /* PRECEDENCE */
|
|||
|
|
jp2->approx = cio_read(cio, 1); /* APPROX */
|
|||
|
|
|
|||
|
|
if (jp2->meth == 1)
|
|||
|
|
{
|
|||
|
|
jp2->enumcs = cio_read(cio, 4); /* EnumCS */
|
|||
|
|
}
|
|||
|
|
else
|
|||
|
|
{
|
|||
|
|
/* skip PROFILE */
|
|||
|
|
skip_len = box->init_pos + box->length - cio_tell(cio);
|
|||
|
|
if (skip_len < 0)
|
|||
|
|
{
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Error with COLR box size\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
if(skip_len > 0)
|
|||
|
|
{
|
|||
|
|
unsigned char *start;
|
|||
|
|
|
|||
|
|
start = cio_getbp(cio);
|
|||
|
|
color->icc_profile_buf = (unsigned char*)opj_malloc(skip_len);
|
|||
|
|
color->icc_profile_len = skip_len;
|
|||
|
|
|
|||
|
|
cio_skip(cio, box->init_pos + box->length - cio_tell(cio));
|
|||
|
|
|
|||
|
|
memcpy(color->icc_profile_buf, start, skip_len);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (cio_tell(cio) - box->init_pos != box->length)
|
|||
|
|
{
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Error with COLR Box\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
color->jp2_has_colr = 1;
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}/* jp2_read_colr() */
|
|||
|
|
|
|||
|
|
bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio, opj_jp2_color_t *color)
|
|||
|
|
{
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
unsigned int jp2h_end;
|
|||
|
|
|
|||
|
|
opj_common_ptr cinfo = jp2->cinfo;
|
|||
|
|
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
do
|
|||
|
|
{
|
|||
|
|
if (JP2_JP2H != box.type)
|
|||
|
|
{
|
|||
|
|
if (box.type == JP2_JP2C)
|
|||
|
|
{
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Expected JP2H Marker\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
cio_skip(cio, box.length - 8);
|
|||
|
|
|
|||
|
|
if(cio->bp >= cio->end) return false;
|
|||
|
|
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
}
|
|||
|
|
} while(JP2_JP2H != box.type);
|
|||
|
|
|
|||
|
|
if (!jp2_read_ihdr(jp2, cio))
|
|||
|
|
return false;
|
|||
|
|
jp2h_end = box.init_pos + box.length;
|
|||
|
|
|
|||
|
|
if (jp2->bpc == 255)
|
|||
|
|
{
|
|||
|
|
if (!jp2_read_bpcc(jp2, cio))
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
|
|||
|
|
while(cio_tell(cio) < jp2h_end)
|
|||
|
|
{
|
|||
|
|
if(box.type == JP2_COLR)
|
|||
|
|
{
|
|||
|
|
if( !jp2_read_colr(jp2, cio, &box, color))
|
|||
|
|
{
|
|||
|
|
cio_seek(cio, box.init_pos + 8);
|
|||
|
|
cio_skip(cio, box.length - 8);
|
|||
|
|
}
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
if(box.type == JP2_CDEF)
|
|||
|
|
{
|
|||
|
|
if( !jp2_read_cdef(jp2, cio, &box, color))
|
|||
|
|
{
|
|||
|
|
cio_seek(cio, box.init_pos + 8);
|
|||
|
|
cio_skip(cio, box.length - 8);
|
|||
|
|
}
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
if(box.type == JP2_PCLR)
|
|||
|
|
{
|
|||
|
|
if( !jp2_read_pclr(jp2, cio, &box, color))
|
|||
|
|
{
|
|||
|
|
cio_seek(cio, box.init_pos + 8);
|
|||
|
|
cio_skip(cio, box.length - 8);
|
|||
|
|
}
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
if(box.type == JP2_CMAP)
|
|||
|
|
{
|
|||
|
|
if( !jp2_read_cmap(jp2, cio, &box, color))
|
|||
|
|
{
|
|||
|
|
cio_seek(cio, box.init_pos + 8);
|
|||
|
|
cio_skip(cio, box.length - 8);
|
|||
|
|
}
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
continue;
|
|||
|
|
}
|
|||
|
|
cio_seek(cio, box.init_pos + 8);
|
|||
|
|
cio_skip(cio, box.length - 8);
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
|
|||
|
|
}/* while(cio_tell(cio) < box_end) */
|
|||
|
|
|
|||
|
|
cio_seek(cio, jp2h_end);
|
|||
|
|
|
|||
|
|
/* Part 1, I.5.3.3 : 'must contain at least one' */
|
|||
|
|
return (color->jp2_has_colr == 1);
|
|||
|
|
|
|||
|
|
}/* jp2_read_jp2h() */
|
|||
|
|
|
|||
|
|
opj_image_t* jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio,
|
|||
|
|
opj_codestream_info_t *cstr_info)
|
|||
|
|
{
|
|||
|
|
opj_common_ptr cinfo;
|
|||
|
|
opj_image_t *image = NULL;
|
|||
|
|
opj_jp2_color_t color;
|
|||
|
|
|
|||
|
|
if(!jp2 || !cio)
|
|||
|
|
{
|
|||
|
|
return NULL;
|
|||
|
|
}
|
|||
|
|
memset(&color, 0, sizeof(opj_jp2_color_t));
|
|||
|
|
cinfo = jp2->cinfo;
|
|||
|
|
|
|||
|
|
/* JP2 decoding */
|
|||
|
|
if(!jp2_read_struct(jp2, cio, &color))
|
|||
|
|
{
|
|||
|
|
free_color_data(&color);
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n");
|
|||
|
|
return NULL;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* J2K decoding */
|
|||
|
|
image = j2k_decode(jp2->j2k, cio, cstr_info);
|
|||
|
|
|
|||
|
|
if(!image)
|
|||
|
|
{
|
|||
|
|
free_color_data(&color);
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n");
|
|||
|
|
return NULL;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* Set Image Color Space */
|
|||
|
|
if (jp2->enumcs == 16)
|
|||
|
|
image->color_space = CLRSPC_SRGB;
|
|||
|
|
else if (jp2->enumcs == 17)
|
|||
|
|
image->color_space = CLRSPC_GRAY;
|
|||
|
|
else if (jp2->enumcs == 18)
|
|||
|
|
image->color_space = CLRSPC_SYCC;
|
|||
|
|
else
|
|||
|
|
image->color_space = CLRSPC_UNKNOWN;
|
|||
|
|
|
|||
|
|
if(color.jp2_cdef)
|
|||
|
|
{
|
|||
|
|
jp2_apply_cdef(image, &color);
|
|||
|
|
}
|
|||
|
|
if(color.jp2_pclr)
|
|||
|
|
{
|
|||
|
|
/* Part 1, I.5.3.4: Either both or none : */
|
|||
|
|
if( !color.jp2_pclr->cmap)
|
|||
|
|
jp2_free_pclr(&color);
|
|||
|
|
else
|
|||
|
|
jp2_apply_pclr(&color, image);
|
|||
|
|
}
|
|||
|
|
if(color.icc_profile_buf)
|
|||
|
|
{
|
|||
|
|
image->icc_profile_buf = color.icc_profile_buf;
|
|||
|
|
color.icc_profile_buf = NULL;
|
|||
|
|
image->icc_profile_len = color.icc_profile_len;
|
|||
|
|
}
|
|||
|
|
return image;
|
|||
|
|
|
|||
|
|
}/* jp2_decode() */
|
|||
|
|
|
|||
|
|
|
|||
|
|
void jp2_write_jp2h(opj_jp2_t *jp2, opj_cio_t *cio) {
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
|
|||
|
|
box.init_pos = cio_tell(cio);
|
|||
|
|
cio_skip(cio, 4);
|
|||
|
|
cio_write(cio, JP2_JP2H, 4); /* JP2H */
|
|||
|
|
|
|||
|
|
jp2_write_ihdr(jp2, cio);
|
|||
|
|
|
|||
|
|
if (jp2->bpc == 255) {
|
|||
|
|
jp2_write_bpcc(jp2, cio);
|
|||
|
|
}
|
|||
|
|
jp2_write_colr(jp2, cio);
|
|||
|
|
|
|||
|
|
box.length = cio_tell(cio) - box.init_pos;
|
|||
|
|
cio_seek(cio, box.init_pos);
|
|||
|
|
cio_write(cio, box.length, 4); /* L */
|
|||
|
|
cio_seek(cio, box.init_pos + box.length);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) {
|
|||
|
|
unsigned int i;
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
|
|||
|
|
box.init_pos = cio_tell(cio);
|
|||
|
|
cio_skip(cio, 4);
|
|||
|
|
cio_write(cio, JP2_FTYP, 4); /* FTYP */
|
|||
|
|
|
|||
|
|
cio_write(cio, jp2->brand, 4); /* BR */
|
|||
|
|
cio_write(cio, jp2->minversion, 4); /* MinV */
|
|||
|
|
|
|||
|
|
for (i = 0; i < jp2->numcl; i++) {
|
|||
|
|
cio_write(cio, jp2->cl[i], 4); /* CL */
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
box.length = cio_tell(cio) - box.init_pos;
|
|||
|
|
cio_seek(cio, box.init_pos);
|
|||
|
|
cio_write(cio, box.length, 4); /* L */
|
|||
|
|
cio_seek(cio, box.init_pos + box.length);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) {
|
|||
|
|
int i;
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
|
|||
|
|
opj_common_ptr cinfo = jp2->cinfo;
|
|||
|
|
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
|
|||
|
|
if (JP2_FTYP != box.type) {
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Expected FTYP Marker\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
jp2->brand = cio_read(cio, 4); /* BR */
|
|||
|
|
jp2->minversion = cio_read(cio, 4); /* MinV */
|
|||
|
|
jp2->numcl = (box.length - 16) / 4;
|
|||
|
|
jp2->cl = (unsigned int *) opj_malloc(jp2->numcl * sizeof(unsigned int));
|
|||
|
|
|
|||
|
|
for (i = 0; i < (int)jp2->numcl; i++) {
|
|||
|
|
jp2->cl[i] = cio_read(cio, 4); /* CLi */
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (cio_tell(cio) - box.init_pos != box.length) {
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Error with FTYP Box\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info) {
|
|||
|
|
unsigned int j2k_codestream_offset, j2k_codestream_length;
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
|
|||
|
|
opj_j2k_t *j2k = jp2->j2k;
|
|||
|
|
|
|||
|
|
box.init_pos = cio_tell(cio);
|
|||
|
|
cio_skip(cio, 4);
|
|||
|
|
cio_write(cio, JP2_JP2C, 4); /* JP2C */
|
|||
|
|
|
|||
|
|
/* J2K encoding */
|
|||
|
|
j2k_codestream_offset = cio_tell(cio);
|
|||
|
|
if(!j2k_encode(j2k, cio, image, cstr_info)) {
|
|||
|
|
opj_event_msg(j2k->cinfo, EVT_ERROR, "Failed to encode image\n");
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
j2k_codestream_length = cio_tell(cio) - j2k_codestream_offset;
|
|||
|
|
|
|||
|
|
jp2->j2k_codestream_offset = j2k_codestream_offset;
|
|||
|
|
jp2->j2k_codestream_length = j2k_codestream_length;
|
|||
|
|
|
|||
|
|
box.length = 8 + jp2->j2k_codestream_length;
|
|||
|
|
cio_seek(cio, box.init_pos);
|
|||
|
|
cio_write(cio, box.length, 4); /* L */
|
|||
|
|
cio_seek(cio, box.init_pos + box.length);
|
|||
|
|
|
|||
|
|
return box.length;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset) {
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
|
|||
|
|
opj_common_ptr cinfo = jp2->cinfo;
|
|||
|
|
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
do {
|
|||
|
|
if(JP2_JP2C != box.type) {
|
|||
|
|
cio_skip(cio, box.length - 8);
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
}
|
|||
|
|
} while(JP2_JP2C != box.type);
|
|||
|
|
|
|||
|
|
*j2k_codestream_offset = cio_tell(cio);
|
|||
|
|
*j2k_codestream_length = box.length - 8;
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static void jp2_write_jp(opj_cio_t *cio) {
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
|
|||
|
|
box.init_pos = cio_tell(cio);
|
|||
|
|
cio_skip(cio, 4);
|
|||
|
|
cio_write(cio, JP2_JP, 4); /* JP2 signature */
|
|||
|
|
cio_write(cio, 0x0d0a870a, 4);
|
|||
|
|
|
|||
|
|
box.length = cio_tell(cio) - box.init_pos;
|
|||
|
|
cio_seek(cio, box.init_pos);
|
|||
|
|
cio_write(cio, box.length, 4); /* L */
|
|||
|
|
cio_seek(cio, box.init_pos + box.length);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio) {
|
|||
|
|
opj_jp2_box_t box;
|
|||
|
|
|
|||
|
|
opj_common_ptr cinfo = jp2->cinfo;
|
|||
|
|
|
|||
|
|
jp2_read_boxhdr(cinfo, cio, &box);
|
|||
|
|
if (JP2_JP != box.type) {
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Expected JP Marker\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
if (0x0d0a870a != cio_read(cio, 4)) {
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Error with JP Marker\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
if (cio_tell(cio) - box.init_pos != box.length) {
|
|||
|
|
opj_event_msg(cinfo, EVT_ERROR, "Error with JP Box size\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio,
|
|||
|
|
opj_jp2_color_t *color) {
|
|||
|
|
if (!jp2_read_jp(jp2, cio))
|
|||
|
|
return false;
|
|||
|
|
if (!jp2_read_ftyp(jp2, cio))
|
|||
|
|
return false;
|
|||
|
|
if (!jp2_read_jp2h(jp2, cio, color))
|
|||
|
|
return false;
|
|||
|
|
if (!jp2_read_jp2c(jp2, cio, &jp2->j2k_codestream_length, &jp2->j2k_codestream_offset))
|
|||
|
|
return false;
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* ----------------------------------------------------------------------- */
|
|||
|
|
/* JP2 decoder interface */
|
|||
|
|
/* ----------------------------------------------------------------------- */
|
|||
|
|
|
|||
|
|
opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo) {
|
|||
|
|
opj_jp2_t *jp2 = (opj_jp2_t*) opj_calloc(1, sizeof(opj_jp2_t));
|
|||
|
|
if(jp2) {
|
|||
|
|
jp2->cinfo = cinfo;
|
|||
|
|
/* create the J2K codec */
|
|||
|
|
jp2->j2k = j2k_create_decompress(cinfo);
|
|||
|
|
if(jp2->j2k == NULL) {
|
|||
|
|
jp2_destroy_decompress(jp2);
|
|||
|
|
return NULL;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return jp2;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void jp2_destroy_decompress(opj_jp2_t *jp2) {
|
|||
|
|
if(jp2) {
|
|||
|
|
/* destroy the J2K codec */
|
|||
|
|
j2k_destroy_decompress(jp2->j2k);
|
|||
|
|
|
|||
|
|
if(jp2->comps) {
|
|||
|
|
opj_free(jp2->comps);
|
|||
|
|
}
|
|||
|
|
if(jp2->cl) {
|
|||
|
|
opj_free(jp2->cl);
|
|||
|
|
}
|
|||
|
|
opj_free(jp2);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters) {
|
|||
|
|
/* setup the J2K codec */
|
|||
|
|
j2k_setup_decoder(jp2->j2k, parameters);
|
|||
|
|
/* further JP2 initializations go here */
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* ----------------------------------------------------------------------- */
|
|||
|
|
/* JP2 encoder interface */
|
|||
|
|
/* ----------------------------------------------------------------------- */
|
|||
|
|
|
|||
|
|
opj_jp2_t* jp2_create_compress(opj_common_ptr cinfo) {
|
|||
|
|
opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t));
|
|||
|
|
if(jp2) {
|
|||
|
|
jp2->cinfo = cinfo;
|
|||
|
|
/* create the J2K codec */
|
|||
|
|
jp2->j2k = j2k_create_compress(cinfo);
|
|||
|
|
if(jp2->j2k == NULL) {
|
|||
|
|
jp2_destroy_compress(jp2);
|
|||
|
|
return NULL;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return jp2;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void jp2_destroy_compress(opj_jp2_t *jp2) {
|
|||
|
|
if(jp2) {
|
|||
|
|
/* destroy the J2K codec */
|
|||
|
|
j2k_destroy_compress(jp2->j2k);
|
|||
|
|
|
|||
|
|
if(jp2->comps) {
|
|||
|
|
opj_free(jp2->comps);
|
|||
|
|
}
|
|||
|
|
if(jp2->cl) {
|
|||
|
|
opj_free(jp2->cl);
|
|||
|
|
}
|
|||
|
|
opj_free(jp2);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image) {
|
|||
|
|
int i;
|
|||
|
|
int depth_0, sign;
|
|||
|
|
|
|||
|
|
if(!jp2 || !parameters || !image)
|
|||
|
|
return;
|
|||
|
|
|
|||
|
|
/* setup the J2K codec */
|
|||
|
|
/* ------------------- */
|
|||
|
|
|
|||
|
|
/* Check if number of components respects standard */
|
|||
|
|
if (image->numcomps < 1 || image->numcomps > 16384) {
|
|||
|
|
opj_event_msg(jp2->cinfo, EVT_ERROR, "Invalid number of components specified while setting up JP2 encoder\n");
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
j2k_setup_encoder(jp2->j2k, parameters, image);
|
|||
|
|
|
|||
|
|
/* setup the JP2 codec */
|
|||
|
|
/* ------------------- */
|
|||
|
|
|
|||
|
|
/* Profile box */
|
|||
|
|
|
|||
|
|
jp2->brand = JP2_JP2; /* BR */
|
|||
|
|
jp2->minversion = 0; /* MinV */
|
|||
|
|
jp2->numcl = 1;
|
|||
|
|
jp2->cl = (unsigned int*) opj_malloc(jp2->numcl * sizeof(unsigned int));
|
|||
|
|
jp2->cl[0] = JP2_JP2; /* CL0 : JP2 */
|
|||
|
|
|
|||
|
|
/* Image Header box */
|
|||
|
|
|
|||
|
|
jp2->numcomps = image->numcomps; /* NC */
|
|||
|
|
jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
|
|||
|
|
jp2->h = image->y1 - image->y0; /* HEIGHT */
|
|||
|
|
jp2->w = image->x1 - image->x0; /* WIDTH */
|
|||
|
|
/* BPC */
|
|||
|
|
depth_0 = image->comps[0].prec - 1;
|
|||
|
|
sign = image->comps[0].sgnd;
|
|||
|
|
jp2->bpc = depth_0 + (sign << 7);
|
|||
|
|
for (i = 1; i < image->numcomps; i++) {
|
|||
|
|
int depth = image->comps[i].prec - 1;
|
|||
|
|
sign = image->comps[i].sgnd;
|
|||
|
|
if (depth_0 != depth)
|
|||
|
|
jp2->bpc = 255;
|
|||
|
|
}
|
|||
|
|
jp2->C = 7; /* C : Always 7 */
|
|||
|
|
jp2->UnkC = 0; /* UnkC, colorspace specified in colr box */
|
|||
|
|
jp2->IPR = 0; /* IPR, no intellectual property */
|
|||
|
|
|
|||
|
|
/* BitsPerComponent box */
|
|||
|
|
|
|||
|
|
for (i = 0; i < image->numcomps; i++) {
|
|||
|
|
jp2->comps[i].bpcc = image->comps[i].prec - 1 + (image->comps[i].sgnd << 7);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/* Colour Specification box */
|
|||
|
|
|
|||
|
|
if ((image->numcomps == 1 || image->numcomps == 3) && (jp2->bpc != 255)) {
|
|||
|
|
jp2->meth = 1; /* METH: Enumerated colourspace */
|
|||
|
|
} else {
|
|||
|
|
jp2->meth = 2; /* METH: Restricted ICC profile */
|
|||
|
|
}
|
|||
|
|
if (jp2->meth == 1) {
|
|||
|
|
if (image->color_space == 1)
|
|||
|
|
jp2->enumcs = 16; /* sRGB as defined by IEC 61966<36>2<EFBFBD>1 */
|
|||
|
|
else if (image->color_space == 2)
|
|||
|
|
jp2->enumcs = 17; /* greyscale */
|
|||
|
|
else if (image->color_space == 3)
|
|||
|
|
jp2->enumcs = 18; /* YUV */
|
|||
|
|
} else {
|
|||
|
|
jp2->enumcs = 0; /* PROFILE (??) */
|
|||
|
|
}
|
|||
|
|
jp2->precedence = 0; /* PRECEDENCE */
|
|||
|
|
jp2->approx = 0; /* APPROX */
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
bool jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info) {
|
|||
|
|
|
|||
|
|
/* JP2 encoding */
|
|||
|
|
|
|||
|
|
/* JPEG 2000 Signature box */
|
|||
|
|
jp2_write_jp(cio);
|
|||
|
|
/* File Type box */
|
|||
|
|
jp2_write_ftyp(jp2, cio);
|
|||
|
|
/* JP2 Header box */
|
|||
|
|
jp2_write_jp2h(jp2, cio);
|
|||
|
|
|
|||
|
|
/* J2K encoding */
|
|||
|
|
|
|||
|
|
if(!jp2_write_jp2c(jp2, cio, image, cstr_info)) {
|
|||
|
|
opj_event_msg(jp2->cinfo, EVT_ERROR, "Failed to encode image\n");
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|