mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
120 lines
3.9 KiB
C
120 lines
3.9 KiB
C
/*
|
|
* 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
|