PacketIter.h

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/*
 *    Copyright (C) 2016-2020 Grok Image Compression Inc.
 *
 *    This source code is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This source code is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 *    This source code incorporates work covered by the BSD 2-clause license.
 *    Please see the LICENSE file in the root directory for details.
 *
 */
 
#pragma once
namespace grk {
 
 
enum J2K_T2_MODE {
        THRESH_CALC = 0, 
        FINAL_PASS = 1 
};
 
 
/***
 * Packet iterator resolution
 */
struct grk_pi_resolution {
        uint32_t pdx, pdy;
        uint32_t pw, ph;
};
 
struct grk_pi_comp {
        uint32_t dx, dy;
        uint32_t numresolutions;
        grk_pi_resolution *resolutions;
};
 
struct PacketIter {
        bool  tp_on;
        bool *include;
        uint64_t step_l;
        uint64_t step_r;
        uint64_t step_c;
        uint32_t step_p;
        uint32_t compno;
        uint32_t resno;
        uint64_t precno;
        uint32_t layno;
        bool first;
         grk_poc  poc;
        uint32_t numcomps;
        grk_pi_comp *comps;
        uint32_t tx0, ty0, tx1, ty1;
        uint32_t x, y;
        uint32_t dx, dy;
};
 
/* ----------------------------------------------------------------------- */
PacketIter* pi_initialise_encode(const grk_image *image, CodingParams *cp,
                uint16_t tileno, J2K_T2_MODE t2_mode);
 
void pi_update_encoding_parameters(const grk_image *p_image, CodingParams *p_cp,
                uint16_t tile_no);
 
void pi_init_encode(PacketIter *pi, CodingParams *cp, uint16_t tileno, uint32_t pino,
                uint32_t tpnum, uint32_t tppos, J2K_T2_MODE t2_mode);
 
PacketIter* pi_create_decode(grk_image *image, CodingParams *cp, uint16_t tileno);
void pi_destroy(PacketIter *p_pi, uint32_t nb_elements);
 
bool pi_next(PacketIter *pi);
/* ----------------------------------------------------------------------- */
 
}