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/*
* JPEG 2000 image decoder
* Copyright (c) 2007 Kamil Nowosad
* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
* Copyright (c) 2022 Caleb Etemesi <etemesicaleb@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_JPEG2000DEC_H
#define AVCODEC_JPEG2000DEC_H
#include "bytestream.h"
#include "jpeg2000.h"
#include "jpeg2000dsp.h"
#define MAX_POCS 32
typedef struct Jpeg2000POCEntry {
uint16_t LYEpoc;
uint16_t CSpoc;
uint16_t CEpoc;
uint8_t RSpoc;
uint8_t REpoc;
uint8_t Ppoc;
} Jpeg2000POCEntry;
typedef struct Jpeg2000POC {
Jpeg2000POCEntry poc[MAX_POCS];
int nb_poc;
int is_default;
} Jpeg2000POC;
typedef struct Jpeg2000TilePart {
uint8_t tile_index; // Tile index who refers the tile-part
const uint8_t *tp_end;
GetByteContext header_tpg; // bit stream of header if PPM header is used
GetByteContext tpg; // bit stream in tile-part
} Jpeg2000TilePart;
/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
* one per component, so tile_part elements have a size of 3 */
typedef struct Jpeg2000Tile {
Jpeg2000Component *comp;
uint8_t properties[4];
Jpeg2000CodingStyle codsty[4];
Jpeg2000QuantStyle qntsty[4];
Jpeg2000POC poc;
Jpeg2000TilePart tile_part[32];
uint8_t has_ppt; // whether this tile has a ppt marker
uint8_t *packed_headers; // contains packed headers. Used only along with PPT marker
int packed_headers_size; // size in bytes of the packed headers
GetByteContext packed_headers_stream; // byte context corresponding to packed headers
uint16_t tp_idx; // Tile-part index
int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
} Jpeg2000Tile;
typedef struct Jpeg2000DecoderContext {
AVClass *class;
AVCodecContext *avctx;
GetByteContext g;
int width, height;
int image_offset_x, image_offset_y;
int tile_offset_x, tile_offset_y;
uint8_t cbps[4]; // bits per sample in particular components
uint8_t sgnd[4]; // if a component is signed
uint8_t properties[4];
uint8_t has_ppm;
uint8_t *packed_headers; // contains packed headers. Used only along with PPM marker
int packed_headers_size;
GetByteContext packed_headers_stream;
uint8_t in_tile_headers;
int cdx[4], cdy[4];
int precision;
int ncomponents;
int colour_space;
uint32_t palette[256];
int8_t pal8;
int cdef[4];
int tile_width, tile_height;
unsigned numXtiles, numYtiles;
int maxtilelen;
AVRational sar;
Jpeg2000CodingStyle codsty[4];
Jpeg2000QuantStyle qntsty[4];
Jpeg2000POC poc;
uint8_t roi_shift[4];
int bit_index;
int curtileno;
Jpeg2000Tile *tile;
Jpeg2000DSPContext dsp;
/*options parameters*/
int reduction_factor;
} Jpeg2000DecoderContext;
#endif //AVCODEC_JPEG2000DEC_H
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