#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "jpeg2000htdec.h"
#include "jpeg2000.h"
#include "jpeg2000dec.h"

Data Structures
struct	StateVars

struct	MelDecoderState

Macros
#define	J2K_Q1 0

#define	J2K_Q2 1

#define	HT_SHIFT_SIGMA 0

#define	HT_SHIFT_SCAN 4

#define	HT_SHIFT_REF 3

#define	HT_SHIFT_REF_IND 2

Functions
static av_always_inline uint32_t	is_divisible (uint32_t n, uint64_t c)
	Given a precomputed c, checks whether n % d == 0. More...

static av_always_inline uint64_t	precompute_c (uint32_t d)
	Precompute the number c used by is_divisible(). More...

static void	jpeg2000_init_zero (StateVars *s)

static void	jpeg2000_init_mel (StateVars *s, uint32_t Pcup)

static void	jpeg2000_init_mag_ref (StateVars *s, uint32_t Lref)

static void	jpeg2000_init_mel_decoder (MelDecoderState *mel_state)

static int	jpeg2000_bitbuf_refill_backwards (StateVars buffer, const uint8_t array)
	Refill the buffer backwards in little endian while skipping over stuffing bits. More...

static void	jpeg2000_bitbuf_refill_forward (StateVars buffer, const uint8_t array, uint32_t length)
	Refill the bit-buffer reading new bits going forward in the stream while skipping over stuffed bits. More...

static av_always_inline void	jpeg2000_bitbuf_drop_bits_lsb (StateVars *buf, uint8_t nbits)
	Drops bits from lower bits in the bit buffer. More...

static av_always_inline uint64_t	jpeg2000_bitbuf_get_bits_lsb (StateVars bit_stream, uint8_t nbits, const uint8_t buf)
	Get bits from the bit buffer reading them from the least significant bits moving to the most significant bits. More...

static av_always_inline uint64_t	jpeg2000_bitbuf_get_bits_lsb_forward (StateVars bit_stream, uint8_t nbits, const uint8_t buf, uint32_t length)
	Get bits from the bit buffer reading them from the least significant bits moving to the most significant bits. More...

static av_always_inline uint64_t	jpeg2000_bitbuf_peek_bits_lsb (StateVars *stream, uint8_t nbits)
	Look ahead bit buffer without discarding bits. More...

static void	jpeg2000_init_vlc (StateVars s, uint32_t Lcup, uint32_t Pcup, const uint8_t Dcup)

static av_always_inline int	jpeg2000_decode_ctx_vlc (const Jpeg2000DecoderContext s, StateVars vlc_stream, const uint16_t table, const uint8_t Dcup, uint8_t sig_pat, uint8_t res_off, uint8_t emb_pat_k, uint8_t emb_pat_1, uint8_t pos, uint32_t Pcup, uint16_t context)
	Decode prefix codes for VLC segment. More...

static av_always_inline uint8_t	vlc_decode_u_prefix (StateVars vlc_stream, const uint8_t refill_array)
	Decode variable length u-vlc prefix. More...

static av_always_inline uint8_t	vlc_decode_u_suffix (StateVars vlc_stream, uint8_t suffix, const uint8_t refill_array)
	Decode variable length u-vlc suffix. More...

static av_always_inline uint8_t	vlc_decode_u_extension (StateVars vlc_stream, uint8_t suffix, const uint8_t refill_array)
	Decode u-vlc extension values. More...

static av_always_inline int32_t	jpeg2000_decode_mag_sgn (StateVars mag_sgn_stream, int32_t m_n, int32_t i_n, const uint8_t buf, uint32_t length)
	Magnitude and Sign decode procedures. More...

static av_always_inline void	recover_mag_sgn (StateVars mag_sgn, uint8_t pos, uint16_t q, int32_t m_n[2], int32_t known_1[2], const uint8_t emb_pat_1[2], int32_t v[2][4], int32_t m[2][4], uint8_t E, uint32_t mu_n, const uint8_t Dcup, uint32_t Pcup, uint32_t pLSB)

static int	jpeg2000_import_bit (StateVars stream, const uint8_t array, uint32_t length)

static int	jpeg2000_peek_bit (StateVars stream, const uint8_t array, uint32_t length)

static int	jpeg2000_decode_mel_sym (MelDecoderState mel_state, StateVars mel_stream, const uint8_t *Dcup, uint32_t Lcup)

static av_always_inline int	jpeg2000_import_magref_bit (StateVars stream, const uint8_t array, uint32_t length)
	Magref decoding procedures. More...

static int	jpeg2000_decode_sig_emb (const Jpeg2000DecoderContext s, MelDecoderState mel_state, StateVars mel_stream, StateVars vlc_stream, const uint16_t vlc_table, const uint8_t Dcup, uint8_t sig_pat, uint8_t res_off, uint8_t emb_pat_k, uint8_t emb_pat_1, uint8_t pos, uint16_t context, uint32_t Lcup, uint32_t Pcup)
	Signal EMB decode. More...

static av_always_inline int	jpeg2000_get_state (int x1, int x2, int width, int shift_by, const uint8_t *block_states)

static av_always_inline void	jpeg2000_modify_state (int x1, int x2, int width, int value, uint8_t *block_states)

static av_always_inline int	jpeg2000_decode_ht_cleanup_segment (const Jpeg2000DecoderContext s, Jpeg2000Cblk cblk, Jpeg2000T1Context t1, MelDecoderState mel_state, StateVars mel_stream, StateVars vlc_stream, StateVars mag_sgn_stream, const uint8_t Dcup, uint32_t Lcup, uint32_t Pcup, uint8_t pLSB, int width, int height, int32_t sample_buf, uint8_t block_states)

static void	jpeg2000_calc_mbr (uint8_t mbr, const uint16_t i, const uint16_t j, const uint32_t mbr_info, uint8_t causal_cond, uint8_t block_states, int width)

static void	jpeg2000_process_stripes_block (StateVars sig_prop, int i_s, int j_s, int width, int height, int stride, int pLSB, int32_t sample_buf, uint8_t block_states, uint8_t magref_segment, uint32_t magref_length)

static av_noinline void	jpeg2000_decode_sigprop_segment (Jpeg2000Cblk cblk, uint16_t width, uint16_t height, uint8_t magref_segment, uint32_t magref_length, uint8_t pLSB, int32_t sample_buf, uint8_t block_states)
	See procedure decodeSigPropMag at Rec. More...

static int	jpeg2000_decode_magref_segment (uint16_t width, uint16_t block_height, uint8_t magref_segment, uint32_t magref_length, uint8_t pLSB, int32_t sample_buf, uint8_t *block_states)
	See procedure decodeSigPropMag at Rec. More...

int	ff_jpeg2000_decode_htj2k (const Jpeg2000DecoderContext s, Jpeg2000CodingStyle codsty, Jpeg2000T1Context t1, Jpeg2000Cblk cblk, int width, int height, int magp, uint8_t roi_shift)
	HT Block decoder as specified in Rec. More...

Variables
const static uint8_t	mel_e [13] = { 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5 }

static const uint16_t	dec_cxt_vlc_table1 [1024]
	CtxVLC tables (see Rec. More...

static const uint16_t	dec_cxt_vlc_table0 [1024]

Macro Definition Documentation

◆ J2K_Q1

#define J2K_Q1 0

Definition at line 59 of file jpeg2000htdec.c.

◆ J2K_Q2

#define J2K_Q2 1

Definition at line 60 of file jpeg2000htdec.c.

◆ HT_SHIFT_SIGMA

#define HT_SHIFT_SIGMA 0

Definition at line 62 of file jpeg2000htdec.c.

◆ HT_SHIFT_SCAN

#define HT_SHIFT_SCAN 4

Definition at line 63 of file jpeg2000htdec.c.

◆ HT_SHIFT_REF

#define HT_SHIFT_REF 3

Definition at line 64 of file jpeg2000htdec.c.

◆ HT_SHIFT_REF_IND

#define HT_SHIFT_REF_IND 2

Definition at line 65 of file jpeg2000htdec.c.

Function Documentation

◆ is_divisible()

static av_always_inline uint32_t is_divisible	(	uint32_t	n,
		uint64_t	c
	)

static

Given a precomputed c, checks whether n % d == 0.

c is precomputed from d using precompute_c().

Definition at line 93 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ precompute_c()

static av_always_inline uint64_t precompute_c ( uint32_t d )

static

Precompute the number c used by is_divisible().

Definition at line 102 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ jpeg2000_init_zero()

static void jpeg2000_init_zero ( StateVars * s )

static

Definition at line 107 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k(), jpeg2000_decode_sigprop_segment(), and jpeg2000_init_mel().

◆ jpeg2000_init_mel()

static void jpeg2000_init_mel	(	StateVars *	s,
		uint32_t	Pcup
	)

static

Definition at line 117 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k().

◆ jpeg2000_init_mag_ref()

static void jpeg2000_init_mag_ref	(	StateVars *	s,
		uint32_t	Lref
	)

static

Definition at line 123 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_magref_segment().

◆ jpeg2000_init_mel_decoder()

static void jpeg2000_init_mel_decoder ( MelDecoderState * mel_state )

static

Definition at line 133 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k().

◆ jpeg2000_bitbuf_refill_backwards()

static int jpeg2000_bitbuf_refill_backwards	(	StateVars *	buffer,
		const uint8_t *	array
	)

static

Refill the buffer backwards in little endian while skipping over stuffing bits.

Stuffing bits are those that appear in the position of any byte whose LSBs are all 1's if the last consumed byte was larger than 0x8F.

Unstuff bits. Load a temporary byte, which precedes the position we currently at, to ensure that we can also un-stuff if the stuffed bit is the bottom most bits.

Definition at line 145 of file jpeg2000htdec.c.

Referenced by jpeg2000_bitbuf_get_bits_lsb(), jpeg2000_decode_ctx_vlc(), jpeg2000_decode_ht_cleanup_segment(), jpeg2000_init_vlc(), vlc_decode_u_prefix(), and vlc_decode_u_suffix().

◆ jpeg2000_bitbuf_refill_forward()

static void jpeg2000_bitbuf_refill_forward	(	StateVars *	buffer,
		const uint8_t *	array,
		uint32_t	length
	)

static

Refill the bit-buffer reading new bits going forward in the stream while skipping over stuffed bits.

Definition at line 193 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k(), and jpeg2000_bitbuf_get_bits_lsb_forward().

◆ jpeg2000_bitbuf_drop_bits_lsb()

static av_always_inline void jpeg2000_bitbuf_drop_bits_lsb	(	StateVars *	buf,
		uint8_t	nbits
	)

static

Drops bits from lower bits in the bit buffer.

buf contains the bit buffers. nbits is the number of bits to remove.

Definition at line 214 of file jpeg2000htdec.c.

Referenced by jpeg2000_bitbuf_get_bits_lsb(), jpeg2000_bitbuf_get_bits_lsb_forward(), jpeg2000_decode_ctx_vlc(), jpeg2000_init_vlc(), vlc_decode_u_prefix(), and vlc_decode_u_suffix().

◆ jpeg2000_bitbuf_get_bits_lsb()

static av_always_inline uint64_t jpeg2000_bitbuf_get_bits_lsb	(	StateVars *	bit_stream,
		uint8_t	nbits,
		const uint8_t *	buf
	)

static

Get bits from the bit buffer reading them from the least significant bits moving to the most significant bits.

In case there are fewer bits, refill from buf moving backwards.

Definition at line 227 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment(), jpeg2000_import_magref_bit(), and vlc_decode_u_extension().

◆ jpeg2000_bitbuf_get_bits_lsb_forward()

static av_always_inline uint64_t jpeg2000_bitbuf_get_bits_lsb_forward	(	StateVars *	bit_stream,
		uint8_t	nbits,
		const uint8_t *	buf,
		uint32_t	length
	)

static

Get bits from the bit buffer reading them from the least significant bits moving to the most significant bits.

In case there are fewer bits, refill from buf moving forward.

Definition at line 245 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_mag_sgn().

◆ jpeg2000_bitbuf_peek_bits_lsb()

static av_always_inline uint64_t jpeg2000_bitbuf_peek_bits_lsb	(	StateVars *	stream,
		uint8_t	nbits
	)

static

Look ahead bit buffer without discarding bits.

Definition at line 263 of file jpeg2000htdec.c.

Referenced by vlc_decode_u_prefix(), and vlc_decode_u_suffix().

◆ jpeg2000_init_vlc()

static void jpeg2000_init_vlc	(	StateVars *	s,
		uint32_t	Lcup,
		uint32_t	Pcup,
		const uint8_t *	Dcup
	)

static

Definition at line 269 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k().

◆ jpeg2000_decode_ctx_vlc()

static av_always_inline int jpeg2000_decode_ctx_vlc	(	const Jpeg2000DecoderContext *	s,
		StateVars *	vlc_stream,
		const uint16_t *	table,
		const uint8_t *	Dcup,
		uint8_t *	sig_pat,
		uint8_t *	res_off,
		uint8_t *	emb_pat_k,
		uint8_t *	emb_pat_1,
		uint8_t	pos,
		uint32_t	Pcup,
		uint16_t	context
	)

static

Decode prefix codes for VLC segment.

See Rec. ITU-T T.814, 7.3.5.

Definition at line 287 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_sig_emb().

◆ vlc_decode_u_prefix()

static av_always_inline uint8_t vlc_decode_u_prefix	(	StateVars *	vlc_stream,
		const uint8_t *	refill_array
	)

static

Decode variable length u-vlc prefix.

See decodeUPrefix procedure at Rec. ITU-T T.814, 7.3.6.

Definition at line 324 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ vlc_decode_u_suffix()

static av_always_inline uint8_t vlc_decode_u_suffix	(	StateVars *	vlc_stream,
		uint8_t	suffix,
		const uint8_t *	refill_array
	)

static

Decode variable length u-vlc suffix.

See decodeUSuffix procedure at Rec. ITU-T T.814, 7.3.6.

Definition at line 345 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ vlc_decode_u_extension()

static av_always_inline uint8_t vlc_decode_u_extension	(	StateVars *	vlc_stream,
		uint8_t	suffix,
		const uint8_t *	refill_array
	)

static

Decode u-vlc extension values.

See decodeUExtension procedure at Rec. ITU-T T.814, 7.3.6.

Definition at line 370 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ jpeg2000_decode_mag_sgn()

static av_always_inline int32_t jpeg2000_decode_mag_sgn	(	StateVars *	mag_sgn_stream,
		int32_t	m_n,
		int32_t	i_n,
		const uint8_t *	buf,
		uint32_t	length
	)

static

Magnitude and Sign decode procedures.

See decodeMagSgnValue procedure at Rec. ITU-T T.814, 7.3.8.

Definition at line 381 of file jpeg2000htdec.c.

Referenced by recover_mag_sgn().

◆ recover_mag_sgn()

static av_always_inline void recover_mag_sgn	(	StateVars *	mag_sgn,
		uint8_t	pos,
		uint16_t	q,
		int32_t	m_n[2],
		int32_t	known_1[2],
		const uint8_t	emb_pat_1[2],
		int32_t	v[2][4],
		int32_t	m[2][4],
		uint8_t *	E,
		uint32_t *	mu_n,
		const uint8_t *	Dcup,
		uint32_t	Pcup,
		uint32_t	pLSB
	)

static

Definition at line 393 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ jpeg2000_import_bit()

static int jpeg2000_import_bit	(	StateVars *	stream,
		const uint8_t *	array,
		uint32_t	length
	)

static

Definition at line 414 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_mel_sym().

◆ jpeg2000_peek_bit()

static int jpeg2000_peek_bit	(	StateVars *	stream,
		const uint8_t *	array,
		uint32_t	length
	)

static

Definition at line 427 of file jpeg2000htdec.c.

Referenced by jpeg2000_process_stripes_block().

◆ jpeg2000_decode_mel_sym()

static int jpeg2000_decode_mel_sym	(	MelDecoderState *	mel_state,
		StateVars *	mel_stream,
		const uint8_t *	Dcup,
		uint32_t	Lcup
	)

static

Definition at line 439 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment(), and jpeg2000_decode_sig_emb().

◆ jpeg2000_import_magref_bit()

static av_always_inline int jpeg2000_import_magref_bit	(	StateVars *	stream,
		const uint8_t *	array,
		uint32_t	length
	)

static

Magref decoding procedures.

Definition at line 478 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_magref_segment().

◆ jpeg2000_decode_sig_emb()

static int jpeg2000_decode_sig_emb	(	const Jpeg2000DecoderContext *	s,
		MelDecoderState *	mel_state,
		StateVars *	mel_stream,
		StateVars *	vlc_stream,
		const uint16_t *	vlc_table,
		const uint8_t *	Dcup,
		uint8_t *	sig_pat,
		uint8_t *	res_off,
		uint8_t *	emb_pat_k,
		uint8_t *	emb_pat_1,
		uint8_t	pos,
		uint16_t	context,
		uint32_t	Lcup,
		uint32_t	Pcup
	)

static

Signal EMB decode.

Definition at line 487 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ jpeg2000_get_state()

static av_always_inline int jpeg2000_get_state	(	int	x1,
		int	x2,
		int	width,
		int	shift_by,
		const uint8_t *	block_states
	)

static

Definition at line 511 of file jpeg2000htdec.c.

Referenced by jpeg2000_calc_mbr(), jpeg2000_decode_magref_segment(), and jpeg2000_process_stripes_block().

◆ jpeg2000_modify_state()

static av_always_inline void jpeg2000_modify_state	(	int	x1,
		int	x2,
		int	width,
		int	value,
		uint8_t *	block_states
	)

static

Definition at line 518 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment(), jpeg2000_decode_magref_segment(), and jpeg2000_process_stripes_block().

◆ jpeg2000_decode_ht_cleanup_segment()

static av_always_inline int jpeg2000_decode_ht_cleanup_segment	(	const Jpeg2000DecoderContext *	s,
		Jpeg2000Cblk *	cblk,
		Jpeg2000T1Context *	t1,
		MelDecoderState *	mel_state,
		StateVars *	mel_stream,
		StateVars *	vlc_stream,
		StateVars *	mag_sgn_stream,
		const uint8_t *	Dcup,
		uint32_t	Lcup,
		uint32_t	Pcup,
		uint8_t	pLSB,
		int	width,
		int	height,
		int32_t *	sample_buf,
		uint8_t *	block_states
	)

static

Initial line pair end. As an optimization, we can replace modulo operations with checking if a number is divisible , since that's the only thing we need. This is paired with is_divisible. Credits to Daniel Lemire blog post [1].

[1] https://lemire.me/blog/2019/02/08/faster-remainders-when-the-divisor-is-a-constant-beating-compilers-and-libdivide/

It's UB on zero, but the spec doesn't allow a quad being zero, so we error out early in case that's the case.

Definition at line 525 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k().

◆ jpeg2000_calc_mbr()

static void jpeg2000_calc_mbr	(	uint8_t *	mbr,
		const uint16_t	i,
		const uint16_t	j,
		const uint32_t	mbr_info,
		uint8_t	causal_cond,
		uint8_t *	block_states,
		int	width
	)

static

Definition at line 993 of file jpeg2000htdec.c.

Referenced by jpeg2000_process_stripes_block().

◆ jpeg2000_process_stripes_block()

static void jpeg2000_process_stripes_block	(	StateVars *	sig_prop,
		int	i_s,
		int	j_s,
		int	width,
		int	height,
		int	stride,
		int	pLSB,
		int32_t *	sample_buf,
		uint8_t *	block_states,
		uint8_t *	magref_segment,
		uint32_t	magref_length
	)

static

Definition at line 1032 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_sigprop_segment().

◆ jpeg2000_decode_sigprop_segment()

static av_noinline void jpeg2000_decode_sigprop_segment	(	Jpeg2000Cblk *	cblk,
		uint16_t	width,
		uint16_t	height,
		uint8_t *	magref_segment,
		uint32_t	magref_length,
		uint8_t	pLSB,
		int32_t *	sample_buf,
		uint8_t *	block_states
	)

static

See procedure decodeSigPropMag at Rec.

ITU-T T.814, 7.4.

Definition at line 1063 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k().

◆ jpeg2000_decode_magref_segment()

static int jpeg2000_decode_magref_segment	(	uint16_t	width,
		uint16_t	block_height,
		uint8_t *	magref_segment,
		uint32_t	magref_length,
		uint8_t	pLSB,
		int32_t *	sample_buf,
		uint8_t *	block_states
	)

static

See procedure decodeSigPropMag at Rec.

ITU-T T.814, 7.5.

We move column wise, going from one quad to another. See Rec. ITU-T T.814, Figure 7.

Definition at line 1117 of file jpeg2000htdec.c.

Referenced by ff_jpeg2000_decode_htj2k().

◆ ff_jpeg2000_decode_htj2k()

int ff_jpeg2000_decode_htj2k	(	const Jpeg2000DecoderContext *	s,
		Jpeg2000CodingStyle *	codsty,
		Jpeg2000T1Context *	t1,
		Jpeg2000Cblk *	cblk,
		int	width,
		int	height,
		int	magp,
		uint8_t	roi_shift
	)

HT Block decoder as specified in Rec.

ITU-T T.814 | ISO/IEC 15444-15

Definition at line 1161 of file jpeg2000htdec.c.

Referenced by tile_codeblocks().

Variable Documentation

◆ mel_e

const static uint8_t mel_e[13] = { 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5 }

static

Definition at line 68 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_mel_sym().

◆ dec_cxt_vlc_table1

static const uint16_t dec_cxt_vlc_table1

static

CtxVLC tables (see Rec.

ITU-T T.800, Annex C) as found at https://github.com/osamu620/OpenHTJ2K (author: Osamu Watanabe)

Definition at line 70 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

◆ dec_cxt_vlc_table0

static const uint16_t dec_cxt_vlc_table0

static

Definition at line 71 of file jpeg2000htdec.c.

Referenced by jpeg2000_decode_ht_cleanup_segment().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ J2K_Q1

◆ J2K_Q2

◆ HT_SHIFT_SIGMA

◆ HT_SHIFT_SCAN

◆ HT_SHIFT_REF

◆ HT_SHIFT_REF_IND

Function Documentation

◆ is_divisible()

◆ precompute_c()

◆ jpeg2000_init_zero()

◆ jpeg2000_init_mel()

◆ jpeg2000_init_mag_ref()

◆ jpeg2000_init_mel_decoder()

◆ jpeg2000_bitbuf_refill_backwards()

◆ jpeg2000_bitbuf_refill_forward()

◆ jpeg2000_bitbuf_drop_bits_lsb()

◆ jpeg2000_bitbuf_get_bits_lsb()

◆ jpeg2000_bitbuf_get_bits_lsb_forward()

◆ jpeg2000_bitbuf_peek_bits_lsb()

◆ jpeg2000_init_vlc()

◆ jpeg2000_decode_ctx_vlc()

◆ vlc_decode_u_prefix()

◆ vlc_decode_u_suffix()

◆ vlc_decode_u_extension()

◆ jpeg2000_decode_mag_sgn()

◆ recover_mag_sgn()

◆ jpeg2000_import_bit()

◆ jpeg2000_peek_bit()

◆ jpeg2000_decode_mel_sym()

◆ jpeg2000_import_magref_bit()

◆ jpeg2000_decode_sig_emb()

◆ jpeg2000_get_state()

◆ jpeg2000_modify_state()

◆ jpeg2000_decode_ht_cleanup_segment()

◆ jpeg2000_calc_mbr()

◆ jpeg2000_process_stripes_block()

◆ jpeg2000_decode_sigprop_segment()

◆ jpeg2000_decode_magref_segment()

◆ ff_jpeg2000_decode_htj2k()

Variable Documentation

◆ mel_e

◆ dec_cxt_vlc_table1

◆ dec_cxt_vlc_table0