dwt97.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
 
#include <stdint.h>
 
namespace grk {
 
typedef union {
        float f[4];
} grk_dwt_4vec;
 
struct grk_dwt97_info {
        grk_dwt_4vec *mem;
        uint32_t d_n;
        uint32_t s_n;
        uint8_t cas;
};
 
/* process four coefficients at a time*/
typedef union {
        float f[4];
} grk_coeff97;
 
struct grk_dwt97 {
        int64_t bufferShiftEven();
        int64_t bufferShiftOdd();
        grk_coeff97 *data;
        size_t dataSize; // number of floats (four per grk_coeff97 struct)
        uint32_t d_n;
        uint32_t s_n;
        grk_pt range_even;
        grk_pt range_odd;
        int64_t interleaved_offset;
        uint8_t odd_top_left_bit;
};
 
class dwt97 {
public:
 
        void encode_line(int32_t* GRK_RESTRICT a, int32_t d_n, int32_t s_n, uint8_t cas);
 
};
}