jpeg2000dec.c File Reference

#include <inttypes.h>
#include <math.h>
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "thread.h"
#include "jpeg2000.h"
#include "jpeg2000dsp.h"
#include "profiles.h"
#include "jpeg2000dec.h"
#include "jpeg2000htdec.h"

Go to the source code of this file.

Macros
#define	JP2_SIG_TYPE   0x6A502020
#define	JP2_SIG_VALUE   0x0D0A870A
#define	JP2_CODESTREAM   0x6A703263
#define	JP2_HEADER   0x6A703268
#define	HAD_COC   0x01
#define	HAD_QCC   0x02
#define	HT_MIXED   0x80
#define	RGB_PIXEL_FORMATS   AV_PIX_FMT_PAL8,AV_PIX_FMT_RGB24,AV_PIX_FMT_RGBA,AV_PIX_FMT_RGB48,AV_PIX_FMT_RGBA64
#define	GRAY_PIXEL_FORMATS   AV_PIX_FMT_GRAY8,AV_PIX_FMT_GRAY8A,AV_PIX_FMT_GRAY16,AV_PIX_FMT_YA16
#define	YUV_PIXEL_FORMATS
#define	XYZ_PIXEL_FORMATS   AV_PIX_FMT_XYZ12
#define	WRITE_FRAME(D, PIXEL)
#define	OFFSET(x)   offsetof(Jpeg2000DecoderContext, x)
#define	VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Enumerations
enum	HT_PLHD_STATUS { HT_PLHD_OFF, HT_PLHD_ON }

Functions
static int	get_bits (Jpeg2000DecoderContext *s, int n)
static void	jpeg2000_flush (Jpeg2000DecoderContext *s)
static int	tag_tree_decode (Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node, int threshold)
static int	pix_fmt_match (enum AVPixelFormat pix_fmt, int components, int bpc, uint32_t log2_chroma_wh, int pal8)
static int	get_siz (Jpeg2000DecoderContext *s)
static int	get_cap (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
static int	get_cox (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
static int	get_cod (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, const uint8_t *properties)
static int	get_coc (Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)
static int	get_rgn (Jpeg2000DecoderContext *s, int n)
static int	get_qcx (Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
static int	get_qcd (Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, const uint8_t *properties)
static int	get_qcc (Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)
static int	get_poc (Jpeg2000DecoderContext *s, int size, Jpeg2000POC *p)
static int	get_sot (Jpeg2000DecoderContext *s, int n)
static int	read_crg (Jpeg2000DecoderContext *s, int n)
static int	read_cpf (Jpeg2000DecoderContext *s, int n)
static int	get_tlm (Jpeg2000DecoderContext *s, int n)
static int	get_plt (Jpeg2000DecoderContext *s, int n)
static int	get_ppm (Jpeg2000DecoderContext *s, int n)
static int	get_ppt (Jpeg2000DecoderContext *s, int n)
static int	init_tile (Jpeg2000DecoderContext *s, int tileno)
static int	getnpasses (Jpeg2000DecoderContext *s)
static int	getlblockinc (Jpeg2000DecoderContext *s)
static void	select_header (Jpeg2000DecoderContext *s, const Jpeg2000Tile *tile, int *tp_index)
static void	select_stream (Jpeg2000DecoderContext *s, const Jpeg2000Tile *tile, int *tp_index, const Jpeg2000CodingStyle *codsty)
static int	jpeg2000_decode_packet (Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, int *tp_index, const Jpeg2000CodingStyle *codsty, Jpeg2000ResLevel *rlevel, int precno, int layno, const uint8_t *expn, int numgbits)
static int	jpeg2000_decode_packets_po_iteration (Jpeg2000DecoderContext *s, Jpeg2000Tile *tile, int RSpoc, int CSpoc, int LYEpoc, int REpoc, int CEpoc, int Ppoc, int *tp_index)
static int	jpeg2000_decode_packets (Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
static void	decode_sigpass (Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int vert_causal_ctx_csty_symbol)
static void	decode_refpass (Jpeg2000T1Context *t1, int width, int height, int bpno, int vert_causal_ctx_csty_symbol)
static void	decode_clnpass (const Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int seg_symbols, int vert_causal_ctx_csty_symbol)
static int	decode_cblk (const Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk, int width, int height, int bandpos, uint8_t roi_shift, const int M_b)
static void	dequantization_float (int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, Jpeg2000T1Context *t1, Jpeg2000Band *band, const int M_b)
static void	dequantization_int (int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, Jpeg2000T1Context *t1, Jpeg2000Band *band, const int M_b)
static void	dequantization_int_97 (int x, int y, Jpeg2000Cblk *cblk, Jpeg2000Component *comp, Jpeg2000T1Context *t1, Jpeg2000Band *band, const int M_b)
static void	mct_decode (const Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
static int	tile_codeblocks (const Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
static int	jpeg2000_decode_tile (AVCodecContext *avctx, void *td, int jobnr, int threadnr)
static void	jpeg2000_dec_cleanup (Jpeg2000DecoderContext *s)
static int	jpeg2000_read_main_headers (Jpeg2000DecoderContext *s)
static int	jpeg2000_read_bitstream_packets (Jpeg2000DecoderContext *s)
static int	jp2_find_codestream (Jpeg2000DecoderContext *s)
static av_cold int	jpeg2000_decode_init (AVCodecContext *avctx)
static int	jpeg2000_decode_frame (AVCodecContext *avctx, AVFrame *picture, int *got_frame, AVPacket *avpkt)

Variables
static enum AVPixelFormat	rgb_pix_fmts [] = {RGB_PIXEL_FORMATS}
static enum AVPixelFormat	gray_pix_fmts [] = {GRAY_PIXEL_FORMATS}
static enum AVPixelFormat	yuv_pix_fmts [] = {YUV_PIXEL_FORMATS}
static enum AVPixelFormat	xyz_pix_fmts []
static enum AVPixelFormat	all_pix_fmts []
static const AVOption	options []
static const AVClass	jpeg2000_class
const FFCodec	ff_jpeg2000_decoder

Detailed Description

JPEG 2000 image decoder

Definition in file jpeg2000dec.c.

Macro Definition Documentation

JP2_SIG_TYPE

#define JP2_SIG_TYPE   0x6A502020

Definition at line 49 of file jpeg2000dec.c.

JP2_SIG_VALUE

#define JP2_SIG_VALUE   0x0D0A870A

Definition at line 50 of file jpeg2000dec.c.

JP2_CODESTREAM

#define JP2_CODESTREAM   0x6A703263

Definition at line 51 of file jpeg2000dec.c.

JP2_HEADER

#define JP2_HEADER   0x6A703268

Definition at line 52 of file jpeg2000dec.c.

HAD_COC

#define HAD_COC   0x01

Definition at line 54 of file jpeg2000dec.c.

HAD_QCC

#define HAD_QCC   0x02

Definition at line 55 of file jpeg2000dec.c.

HT_MIXED

#define HT_MIXED   0x80

Definition at line 63 of file jpeg2000dec.c.

RGB_PIXEL_FORMATS

#define RGB_PIXEL_FORMATS   AV_PIX_FMT_PAL8,AV_PIX_FMT_RGB24,AV_PIX_FMT_RGBA,AV_PIX_FMT_RGB48,AV_PIX_FMT_RGBA64

Definition at line 170 of file jpeg2000dec.c.

GRAY_PIXEL_FORMATS

#define GRAY_PIXEL_FORMATS   AV_PIX_FMT_GRAY8,AV_PIX_FMT_GRAY8A,AV_PIX_FMT_GRAY16,AV_PIX_FMT_YA16

Definition at line 171 of file jpeg2000dec.c.

YUV_PIXEL_FORMATS

#define YUV_PIXEL_FORMATS

Value:

                            AV_PIX_FMT_YUV410P,AV_PIX_FMT_YUV411P,AV_PIX_FMT_YUVA420P, \
                            AV_PIX_FMT_YUV420P,AV_PIX_FMT_YUV422P,AV_PIX_FMT_YUVA422P, \
                            AV_PIX_FMT_YUV440P,AV_PIX_FMT_YUV444P,AV_PIX_FMT_YUVA444P, \
                            AV_PIX_FMT_YUV420P9,AV_PIX_FMT_YUV422P9,AV_PIX_FMT_YUV444P9, \
                            AV_PIX_FMT_YUVA420P9,AV_PIX_FMT_YUVA422P9,AV_PIX_FMT_YUVA444P9, \
                            AV_PIX_FMT_YUV420P10,AV_PIX_FMT_YUV422P10,AV_PIX_FMT_YUV444P10, \
                            AV_PIX_FMT_YUVA420P10,AV_PIX_FMT_YUVA422P10,AV_PIX_FMT_YUVA444P10, \
                            AV_PIX_FMT_YUV420P12,AV_PIX_FMT_YUV422P12,AV_PIX_FMT_YUV444P12, \
                            AV_PIX_FMT_YUV420P14,AV_PIX_FMT_YUV422P14,AV_PIX_FMT_YUV444P14, \
                            AV_PIX_FMT_YUV420P16,AV_PIX_FMT_YUV422P16,AV_PIX_FMT_YUV444P16, \
                            AV_PIX_FMT_YUVA420P16,AV_PIX_FMT_YUVA422P16,AV_PIX_FMT_YUVA444P16

Definition at line 172 of file jpeg2000dec.c.

XYZ_PIXEL_FORMATS

#define XYZ_PIXEL_FORMATS   AV_PIX_FMT_XYZ12

Definition at line 183 of file jpeg2000dec.c.

WRITE_FRAME

#define WRITE_FRAME	(		D,
			PIXEL
	)

Definition at line 2328 of file jpeg2000dec.c.

OFFSET

#define OFFSET

(

x

)

offsetof(Jpeg2000DecoderContext, x)

Definition at line 2930 of file jpeg2000dec.c.

VD

#define VD   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

Definition at line 2931 of file jpeg2000dec.c.

Enumeration Type Documentation

HT_PLHD_STATUS

enum HT_PLHD_STATUS

Enumerator
HT_PLHD_OFF
HT_PLHD_ON

Definition at line 58 of file jpeg2000dec.c.

Function Documentation

get_bits()

static int get_bits ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 70 of file jpeg2000dec.c.

Referenced by getlblockinc(), getnpasses(), jpeg2000_decode_packet(), and tag_tree_decode().

jpeg2000_flush()

static void jpeg2000_flush ( Jpeg2000DecoderContext *  s )

static

Definition at line 85 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

tag_tree_decode()

static int tag_tree_decode ( Jpeg2000DecoderContext *  s, Jpeg2000TgtNode *  node, int  threshold  )

static

Definition at line 93 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

pix_fmt_match()

static int pix_fmt_match ( enum AVPixelFormat  pix_fmt, int  components, int  bpc, uint32_t  log2_chroma_wh, int  pal8  )

static

Definition at line 133 of file jpeg2000dec.c.

Referenced by get_siz().

get_siz()

static int get_siz ( Jpeg2000DecoderContext *  s )

static

Definition at line 197 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_cap()

static int get_cap ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  c  )

static

Definition at line 445 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_cox()

static int get_cox ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  c  )

static

Definition at line 513 of file jpeg2000dec.c.

Referenced by get_coc(), and get_cod().

get_cod()

static int get_cod ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  c, const uint8_t *  properties  )

static

Definition at line 596 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_coc()

static int get_coc ( Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  c, uint8_t *  properties  )

static

Definition at line 633 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_rgn()

static int get_rgn ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 668 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_qcx()

static int get_qcx ( Jpeg2000DecoderContext *  s, int  n, Jpeg2000QuantStyle *  q  )

static

Definition at line 701 of file jpeg2000dec.c.

Referenced by get_qcc(), and get_qcd().

get_qcd()

static int get_qcd ( Jpeg2000DecoderContext *  s, int  n, Jpeg2000QuantStyle *  q, const uint8_t *  properties  )

static

Definition at line 746 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_qcc()

static int get_qcc ( Jpeg2000DecoderContext *  s, int  n, Jpeg2000QuantStyle *  q, uint8_t *  properties  )

static

Definition at line 764 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_poc()

static int get_poc ( Jpeg2000DecoderContext *  s, int  size, Jpeg2000POC *  p  )

static

Definition at line 785 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_sot()

static int get_sot ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 847 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

read_crg()

static int read_crg ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 900 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

read_cpf()

static int read_cpf ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 910 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_tlm()

static int get_tlm ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 926 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_plt()

static int get_plt ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 961 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_ppm()

static int get_ppm ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 983 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

get_ppt()

static int get_ppt ( Jpeg2000DecoderContext *  s, int  n  )

static

Definition at line 1007 of file jpeg2000dec.c.

Referenced by jpeg2000_read_main_headers().

init_tile()

static int init_tile ( Jpeg2000DecoderContext *  s, int  tileno  )

static

Definition at line 1041 of file jpeg2000dec.c.

Referenced by jpeg2000_read_bitstream_packets().

getnpasses()

static int getnpasses ( Jpeg2000DecoderContext *  s )

static

Definition at line 1098 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

getlblockinc()

static int getlblockinc ( Jpeg2000DecoderContext *  s )

static

Definition at line 1113 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

select_header()

static void select_header ( Jpeg2000DecoderContext *  s, const Jpeg2000Tile *  tile, int *  tp_index  )

inlinestatic

Definition at line 1124 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

select_stream()

static void select_stream ( Jpeg2000DecoderContext *  s, const Jpeg2000Tile *  tile, int *  tp_index, const Jpeg2000CodingStyle *  codsty  )

inlinestatic

Definition at line 1136 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packet().

jpeg2000_decode_packet()

static int jpeg2000_decode_packet ( Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile, int *  tp_index, const Jpeg2000CodingStyle *  codsty, Jpeg2000ResLevel *  rlevel, int  precno, int  layno, const uint8_t *  expn, int  numgbits  )

static

Definition at line 1161 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packets_po_iteration().

jpeg2000_decode_packets_po_iteration()

static int jpeg2000_decode_packets_po_iteration ( Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile, int  RSpoc, int  CSpoc, int  LYEpoc, int  REpoc, int  CEpoc, int  Ppoc, int *  tp_index  )

static

Definition at line 1571 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_packets().

jpeg2000_decode_packets()

static int jpeg2000_decode_packets ( Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile  )

static

Definition at line 1862 of file jpeg2000dec.c.

Referenced by jpeg2000_read_bitstream_packets().

decode_sigpass()

static void decode_sigpass ( Jpeg2000T1Context *  t1, int  width, int  height, int  bpno, int  bandno, int  vert_causal_ctx_csty_symbol  )

static

Definition at line 1899 of file jpeg2000dec.c.

Referenced by decode_cblk().

decode_refpass()

static void decode_refpass ( Jpeg2000T1Context *  t1, int  width, int  height, int  bpno, int  vert_causal_ctx_csty_symbol  )

static

Definition at line 1930 of file jpeg2000dec.c.

Referenced by decode_cblk().

decode_clnpass()

static void decode_clnpass ( const Jpeg2000DecoderContext *  s, Jpeg2000T1Context *  t1, int  width, int  height, int  bpno, int  bandno, int  seg_symbols, int  vert_causal_ctx_csty_symbol  )

static

Definition at line 1956 of file jpeg2000dec.c.

Referenced by decode_cblk().

decode_cblk()

static int decode_cblk ( const Jpeg2000DecoderContext *  s, Jpeg2000CodingStyle *  codsty, Jpeg2000T1Context *  t1, Jpeg2000Cblk *  cblk, int  width, int  height, int  bandpos, uint8_t  roi_shift, const int  M_b  )

static

Definition at line 2020 of file jpeg2000dec.c.

Referenced by tile_codeblocks().

dequantization_float()

static void dequantization_float ( int  x, int  y, Jpeg2000Cblk *  cblk, Jpeg2000Component *  comp, Jpeg2000T1Context *  t1, Jpeg2000Band *  band, const int  M_b  )

static

Definition at line 2125 of file jpeg2000dec.c.

Referenced by tile_codeblocks().

dequantization_int()

static void dequantization_int ( int  x, int  y, Jpeg2000Cblk *  cblk, Jpeg2000Component *  comp, Jpeg2000T1Context *  t1, Jpeg2000Band *  band, const int  M_b  )

static

Definition at line 2147 of file jpeg2000dec.c.

Referenced by tile_codeblocks().

dequantization_int_97()

static void dequantization_int_97 ( int  x, int  y, Jpeg2000Cblk *  cblk, Jpeg2000Component *  comp, Jpeg2000T1Context *  t1, Jpeg2000Band *  band, const int  M_b  )

static

Definition at line 2180 of file jpeg2000dec.c.

Referenced by tile_codeblocks().

mct_decode()

static void mct_decode ( const Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile  )

inlinestatic

Definition at line 2210 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_tile().

tile_codeblocks()

static int tile_codeblocks ( const Jpeg2000DecoderContext *  s, Jpeg2000Tile *  tile  )

inlinestatic

Definition at line 2239 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_tile().

jpeg2000_decode_tile()

static int jpeg2000_decode_tile ( AVCodecContext *  avctx, void *  td, int  jobnr, int  threadnr  )

static

Definition at line 2395 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

jpeg2000_dec_cleanup()

static void jpeg2000_dec_cleanup ( Jpeg2000DecoderContext *  s )

static

Definition at line 2424 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

jpeg2000_read_main_headers()

static int jpeg2000_read_main_headers ( Jpeg2000DecoderContext *  s )

static

Definition at line 2452 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

jpeg2000_read_bitstream_packets()

static int jpeg2000_read_bitstream_packets ( Jpeg2000DecoderContext *  s )

static

Definition at line 2667 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

jp2_find_codestream()

static int jp2_find_codestream ( Jpeg2000DecoderContext *  s )

static

Definition at line 2685 of file jpeg2000dec.c.

Referenced by jpeg2000_decode_frame().

jpeg2000_decode_init()

static av_cold int jpeg2000_decode_init ( AVCodecContext *  avctx )

static

Definition at line 2834 of file jpeg2000dec.c.

jpeg2000_decode_frame()

static int jpeg2000_decode_frame ( AVCodecContext *  avctx, AVFrame *  picture, int *  got_frame, AVPacket *  avpkt  )

static

Definition at line 2852 of file jpeg2000dec.c.

Variable Documentation

rgb_pix_fmts

enum AVPixelFormat rgb_pix_fmts[] = {RGB_PIXEL_FORMATS}

static

Definition at line 185 of file jpeg2000dec.c.

Referenced by geq_query_formats(), and get_siz().

gray_pix_fmts

enum AVPixelFormat gray_pix_fmts[] = {GRAY_PIXEL_FORMATS}

static

Definition at line 186 of file jpeg2000dec.c.

Referenced by get_siz(), and query_formats().

yuv_pix_fmts

enum AVPixelFormat yuv_pix_fmts[] = {YUV_PIXEL_FORMATS}

static

Definition at line 187 of file jpeg2000dec.c.

Referenced by geq_query_formats(), and get_siz().

xyz_pix_fmts

enum AVPixelFormat xyz_pix_fmts[]

static

Initial value:

= {XYZ_PIXEL_FORMATS,
                                                   YUV_PIXEL_FORMATS}

Definition at line 188 of file jpeg2000dec.c.

Referenced by get_siz().

all_pix_fmts

enum AVPixelFormat all_pix_fmts[]

static

Initial value:

= {RGB_PIXEL_FORMATS,
                                                   GRAY_PIXEL_FORMATS,
                                                   YUV_PIXEL_FORMATS,
                                                   XYZ_PIXEL_FORMATS}

Definition at line 190 of file jpeg2000dec.c.

Referenced by get_siz(), and query_formats().

options

const AVOption options[]

static

Initial value:

= {
    { "lowres",  "Lower the decoding resolution by a power of two",
        OFFSET(reduction_factor), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
    { NULL },
}

Definition at line 2933 of file jpeg2000dec.c.

jpeg2000_class

const AVClass jpeg2000_class

static

Initial value:

= {
    .class_name = "jpeg2000",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 2939 of file jpeg2000dec.c.

ff_jpeg2000_decoder

const FFCodec ff_jpeg2000_decoder

Initial value:

= {
    .p.name           = "jpeg2000",
    CODEC_LONG_NAME("JPEG 2000"),
    .p.type           = AVMEDIA_TYPE_VIDEO,
    .p.id             = AV_CODEC_ID_JPEG2000,
    .p.capabilities   = AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_DR1,
    .priv_data_size   = sizeof(Jpeg2000DecoderContext),
    .init             = jpeg2000_decode_init,
    FF_CODEC_DECODE_CB(jpeg2000_decode_frame),
    .p.priv_class     = &jpeg2000_class,
    .p.max_lowres     = 5,
    .p.profiles       = NULL_IF_CONFIG_SMALL(ff_jpeg2000_profiles),
    .caps_internal    = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
}

Definition at line 2946 of file jpeg2000dec.c.