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120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
/*
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* JPEG 2000 image decoder
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* Copyright (c) 2007 Kamil Nowosad
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* Copyright (c) 2013 Nicolas Bertrand <nicoinattendu@gmail.com>
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* Copyright (c) 2022 Caleb Etemesi <etemesicaleb@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_JPEG2000DEC_H
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#define AVCODEC_JPEG2000DEC_H
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#include "bytestream.h"
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#include "jpeg2000.h"
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#include "jpeg2000dsp.h"
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#define MAX_POCS 32
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typedef struct Jpeg2000POCEntry {
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uint16_t LYEpoc;
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uint16_t CSpoc;
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uint16_t CEpoc;
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uint8_t RSpoc;
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uint8_t REpoc;
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uint8_t Ppoc;
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} Jpeg2000POCEntry;
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typedef struct Jpeg2000POC {
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Jpeg2000POCEntry poc[MAX_POCS];
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int nb_poc;
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int is_default;
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} Jpeg2000POC;
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typedef struct Jpeg2000TilePart {
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uint8_t tile_index; // Tile index who refers the tile-part
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const uint8_t *tp_end;
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GetByteContext header_tpg; // bit stream of header if PPM header is used
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GetByteContext tpg; // bit stream in tile-part
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} Jpeg2000TilePart;
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/* RMK: For JPEG2000 DCINEMA 3 tile-parts in a tile
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* one per component, so tile_part elements have a size of 3 */
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typedef struct Jpeg2000Tile {
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Jpeg2000Component *comp;
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uint8_t properties[4];
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Jpeg2000CodingStyle codsty[4];
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Jpeg2000QuantStyle qntsty[4];
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Jpeg2000POC poc;
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Jpeg2000TilePart tile_part[32];
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uint8_t has_ppt; // whether this tile has a ppt marker
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uint8_t *packed_headers; // contains packed headers. Used only along with PPT marker
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int packed_headers_size; // size in bytes of the packed headers
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GetByteContext packed_headers_stream; // byte context corresponding to packed headers
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uint16_t tp_idx; // Tile-part index
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int coord[2][2]; // border coordinates {{x0, x1}, {y0, y1}}
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} Jpeg2000Tile;
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typedef struct Jpeg2000DecoderContext {
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AVClass *class;
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AVCodecContext *avctx;
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GetByteContext g;
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int width, height;
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int image_offset_x, image_offset_y;
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int tile_offset_x, tile_offset_y;
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uint8_t cbps[4]; // bits per sample in particular components
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uint8_t sgnd[4]; // if a component is signed
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uint8_t properties[4];
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uint8_t has_ppm;
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uint8_t *packed_headers; // contains packed headers. Used only along with PPM marker
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int packed_headers_size;
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GetByteContext packed_headers_stream;
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uint8_t in_tile_headers;
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int cdx[4], cdy[4];
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int precision;
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int ncomponents;
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int colour_space;
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uint32_t palette[256];
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int8_t pal8;
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int cdef[4];
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int tile_width, tile_height;
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unsigned numXtiles, numYtiles;
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int maxtilelen;
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AVRational sar;
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Jpeg2000CodingStyle codsty[4];
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Jpeg2000QuantStyle qntsty[4];
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Jpeg2000POC poc;
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uint8_t roi_shift[4];
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int bit_index;
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int curtileno;
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Jpeg2000Tile *tile;
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Jpeg2000DSPContext dsp;
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/*options parameters*/
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int reduction_factor;
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} Jpeg2000DecoderContext;
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#endif //AVCODEC_JPEG2000DEC_H
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