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ffmpeg-rockchip/libavcodec/jpeg2000htdec.c
Michael Niedermayer 9549712056 avcodec/jpeg2000htdec: Consolidate jpeg2000 spec bits in jpeg2000_bitbuf_refill_backwards() 
Code should make more sense now

Fixes: out of array access
Fixes: 58299/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6627570448465920

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Pierre-Anthony Lemieux <pal@sandflow.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2023-08-05 19:52:00 +02:00

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/*
* 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
*/
/*
* Copyright 2019 - 2021, Osamu Watanabe
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "libavutil/avassert.h"
#include "jpeg2000htdec.h"
#include "jpeg2000.h"
#include "jpeg2000dec.h"
#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
/* See Rec. ITU-T T.800, Table 2 */
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];
static const uint16_t dec_cxt_vlc_table0[1024];
typedef struct StateVars {
int32_t pos;
uint32_t bits;
uint32_t tmp;
uint32_t last;
uint8_t bits_left;
uint64_t bit_buf;
} StateVars;
typedef struct MelDecoderState {
uint8_t k;
uint8_t run;
uint8_t one;
} MelDecoderState;
/**
* Given a precomputed c, checks whether n % d == 0. c is precomputed from d
* using precompute_c().
*/
av_always_inline
static uint32_t is_divisible(uint32_t n, uint64_t c)
{
return n * c <= c - 1;
}
/**
* Precompute the number c used by is_divisible().
*/
av_always_inline
static uint64_t precompute_c(uint32_t d)
{
return 1 + (0xffffffffffffffffull / d);
}
static void jpeg2000_init_zero(StateVars *s)
{
s->bits_left = 0;
s->bit_buf = 0;
s->tmp = 0;
s->bits = 0;
s->pos = 0;
s->last = 0;
}
static void jpeg2000_init_mel(StateVars *s, uint32_t Pcup)
{
jpeg2000_init_zero(s);
s->pos = Pcup;
}
static void jpeg2000_init_mag_ref(StateVars *s, uint32_t Lref)
{
s->pos = Lref - 2;
s->bits = 0;
s->last = 0xFF;
s->tmp = 0;
s->bits_left = 0;
s->bit_buf = 0;
}
static void jpeg2000_init_mel_decoder(MelDecoderState *mel_state)
{
mel_state->k = 0;
mel_state->run = 0;
mel_state->one = 0;
}
/**
* 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.
*/
static int jpeg2000_bitbuf_refill_backwards(StateVars *buffer, const uint8_t *array)
{
uint64_t tmp = 0;
int32_t position = buffer->pos - 4;
uint32_t new_bits = 32;
if (buffer->bits_left >= 32)
return 0; // enough data, no need to pull in more bits
/**
* 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.
*/
for(int i = FFMAX(0, position + 1); i <= buffer->pos + 1; i++)
tmp = 256*tmp + array[i];
if ((tmp & 0x7FFF000000) > 0x7F8F000000) {
tmp &= 0x7FFFFFFFFF;
new_bits--;
}
if ((tmp & 0x007FFF0000) > 0x007F8F0000) {
tmp = (tmp & 0x007FFFFFFF) + ((tmp & 0xFF00000000) >> 1);
new_bits--;
}
if ((tmp & 0x00007FFF00) > 0x00007F8F00) {
tmp = (tmp & 0x00007FFFFF) + ((tmp & 0xFFFF000000) >> 1);
new_bits--;
}
if ((tmp & 0x0000007FFF) > 0x0000007F8F) {
tmp = (tmp & 0x0000007FFF) + ((tmp & 0xFFFFFF0000) >> 1);
new_bits--;
}
tmp >>= 8; // Remove temporary byte loaded
/* Add bits to the MSB of the bit buffer */
buffer->bit_buf |= tmp << buffer->bits_left;
buffer->bits_left += new_bits;
buffer->pos = FFMAX(0, position);
return 0;
}
/**
* Refill the bit-buffer reading new bits going forward
* in the stream while skipping over stuffed bits.
*/
static void jpeg2000_bitbuf_refill_forward(StateVars *buffer, const uint8_t *array,
uint32_t length)
{
while (buffer->bits_left < 32) {
buffer->tmp = 0xFF;
buffer->bits = (buffer->last == 0xFF) ? 7 : 8;
if (buffer->pos <= length) {
buffer->tmp = array[buffer->pos];
buffer->pos += 1;
buffer->last = buffer->tmp;
}
buffer->bit_buf |= ((uint64_t) buffer->tmp) << buffer->bits_left;
buffer->bits_left += buffer->bits;
}
}
/**
* Drops bits from lower bits in the bit buffer. buf contains the bit buffers.
* nbits is the number of bits to remove.
*/
av_always_inline
static void jpeg2000_bitbuf_drop_bits_lsb(StateVars *buf, uint8_t nbits)
{
av_assert2(buf->bits_left >= nbits); // cannot read more bits than available
buf->bit_buf >>= nbits;
buf->bits_left -= nbits;
}
/**
* 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.
*/
av_always_inline
static uint64_t jpeg2000_bitbuf_get_bits_lsb(StateVars *bit_stream, uint8_t nbits,
const uint8_t *buf)
{
uint64_t bits;
uint64_t mask = (1ull << nbits) - 1;
if (bit_stream->bits_left < nbits)
jpeg2000_bitbuf_refill_backwards(bit_stream, buf);
bits = bit_stream->bit_buf & mask;
jpeg2000_bitbuf_drop_bits_lsb(bit_stream, nbits);
return bits;
}
/**
* 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.
*/
av_always_inline
static uint64_t jpeg2000_bitbuf_get_bits_lsb_forward(StateVars *bit_stream,
uint8_t nbits, const uint8_t *buf,
uint32_t length)
{
uint64_t bits;
uint64_t mask = (1ull << nbits) - 1;
if (bit_stream->bits_left <= nbits)
jpeg2000_bitbuf_refill_forward(bit_stream, buf, length);
bits = bit_stream->bit_buf & mask;
jpeg2000_bitbuf_drop_bits_lsb(bit_stream, nbits);
return bits;
}
/**
* Look ahead bit buffer without discarding bits.
*/
av_always_inline
static uint64_t jpeg2000_bitbuf_peek_bits_lsb(StateVars *stream, uint8_t nbits)
{
uint64_t mask = (1ull << nbits) - 1;
return stream->bit_buf & mask;
}
static void jpeg2000_init_vlc(StateVars *s, uint32_t Lcup, uint32_t Pcup,
const uint8_t *Dcup)
{
s->bits_left = 0;
s->bit_buf = 0;
s->pos = Lcup - 2 - Pcup;
s->last = Dcup[Lcup - 2];
s->tmp = (s->last) >> 4;
s->bits = ((s->tmp & 7) < 7) ? 4 : 3;
jpeg2000_bitbuf_refill_backwards(s, Dcup + Pcup);
jpeg2000_bitbuf_drop_bits_lsb(s, 4);
}
/**
* Decode prefix codes for VLC segment. See Rec. ITU-T T.814, 7.3.5.
*/
av_always_inline
static 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)
{
uint32_t value;
uint8_t len;
uint64_t index;
uint64_t code_word;
jpeg2000_bitbuf_refill_backwards(vlc_stream, Dcup + Pcup);
code_word = vlc_stream->bit_buf & 0x7f;
index = code_word + (context << 7);
av_assert0(index < 1024); // The CxtVLC table has 1024 entries.
value = table[index];
len = (value & 0x000F) >> 1;
res_off[pos] = (uint8_t) (value & 1);
sig_pat[pos] = (uint8_t) ((value & 0x00F0) >> 4);
emb_pat_k[pos] = (uint8_t) ((value & 0x0F00) >> 8);
emb_pat_1[pos] = (uint8_t) ((value & 0xF000) >> 12);
jpeg2000_bitbuf_drop_bits_lsb(vlc_stream, len);
return 0;
}
/**
* Decode variable length u-vlc prefix. See decodeUPrefix procedure at Rec.
* ITU-T T.814, 7.3.6.
*/
av_always_inline
static uint8_t vlc_decode_u_prefix(StateVars *vlc_stream, const uint8_t *refill_array)
{
static const uint8_t return_value[8] = { 5, 1, 2, 1, 3, 1, 2, 1 };
static const uint8_t drop_bits[8] = { 3, 1, 2, 1, 3, 1, 2, 1 };
uint8_t bits;
if (vlc_stream->bits_left < 3)
jpeg2000_bitbuf_refill_backwards(vlc_stream, refill_array);
bits = jpeg2000_bitbuf_peek_bits_lsb(vlc_stream, 3);
jpeg2000_bitbuf_drop_bits_lsb(vlc_stream, drop_bits[bits]);
return return_value[bits];
}
/**
* Decode variable length u-vlc suffix. See decodeUSuffix procedure at Rec.
* ITU-T T.814, 7.3.6.
*/
av_always_inline
static uint8_t vlc_decode_u_suffix(StateVars *vlc_stream, uint8_t suffix,
const uint8_t *refill_array)
{
static const int mask[] = { 1, 31 };
static const int drop_bits[] = { 1, 5 };
uint8_t bits;
int cond = suffix != 3;
if (suffix < 3)
return 0;
if (vlc_stream->bits_left < 5)
jpeg2000_bitbuf_refill_backwards(vlc_stream, refill_array);
bits = jpeg2000_bitbuf_peek_bits_lsb(vlc_stream, 5);
jpeg2000_bitbuf_drop_bits_lsb(vlc_stream, drop_bits[cond]);
return bits & mask[cond];
}
/**
* Decode u-vlc extension values. See decodeUExtension procedure at Rec. ITU-T
* T.814, 7.3.6.
*/
av_always_inline
static uint8_t vlc_decode_u_extension(StateVars *vlc_stream, uint8_t suffix,
const uint8_t *refill_array)
{
return jpeg2000_bitbuf_get_bits_lsb(vlc_stream, 4 * (suffix >= 28), refill_array);
}
/**
* Magnitude and Sign decode procedures. See decodeMagSgnValue procedure at Rec.
* ITU-T T.814, 7.3.8.
*/
av_always_inline
static 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)
{
int32_t val = 0;
if (m_n > 0) {
val = jpeg2000_bitbuf_get_bits_lsb_forward(mag_sgn_stream,m_n,buf,length);
val += (i_n << m_n);
}
return val;
}
av_always_inline
static 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)
{
for (int i = 0; i < 4; i++) {
int32_t n = 4 * q + i;
m_n[pos] = m[pos][i];
known_1[pos] = (emb_pat_1[pos] >> i) & 1;
v[pos][i] = jpeg2000_decode_mag_sgn(mag_sgn, m_n[pos], known_1[pos], Dcup, Pcup);
if (m_n[pos] != 0) {
E[n] = 32 - ff_clz(v[pos][i] | 1);
mu_n[n] = (v[pos][i] >> 1) + 1;
mu_n[n] <<= pLSB;
mu_n[n] |= ((uint32_t) (v[pos][i] & 1)) << 31; // sign bit.
}
}
}
static int jpeg2000_import_bit(StateVars *stream, const uint8_t *array, uint32_t length)
{
int cond = stream->pos <= length;
int pos = FFMIN(stream->pos, length);
if (stream->bits == 0) {
stream->bits = (stream->tmp == 0xFF) ? 7 : 8;
stream->pos += cond;
stream->tmp = cond ? array[pos] : 0xFF;
}
stream->bits -= 1;
return (stream->tmp >> stream->bits) & 1;
}
static int jpeg2000_peek_bit(StateVars *stream, const uint8_t *array, uint32_t length)
{
if (stream->bits == 0) {
int cond = stream->pos <= length;
int pos = FFMIN(stream->pos, length);
stream->bits = (stream->tmp == 0xFF) ? 7 : 8;
stream->pos += cond;
stream->tmp = cond ? array[pos] : 0xFF;
}
return (stream->tmp >> stream->bits) & 1;
}
static int jpeg2000_decode_mel_sym(MelDecoderState *mel_state,
StateVars *mel_stream,
const uint8_t *Dcup,
uint32_t Lcup)
{
if (mel_state->run == 0 && mel_state->one == 0) {
uint8_t eval;
uint8_t bit;
eval = mel_e[mel_state->k];
bit = jpeg2000_import_bit(mel_stream, Dcup, Lcup);
if (bit == 1) {
mel_state->run = 1 << eval;
mel_state->k = FFMIN(12, mel_state->k + 1);
} else {
mel_state->run = 0;
while (eval > 0) {
bit = jpeg2000_import_bit(mel_stream, Dcup, Lcup);
mel_state->run = (2 * (mel_state->run)) + bit;
eval -= 1;
}
mel_state->k = FFMAX(0, mel_state->k - 1);
mel_state->one = 1;
}
}
if (mel_state->run > 0) {
mel_state->run -= 1;
return 0;
} else {
mel_state->one = 0;
return 1;
}
}
/**
* Magref decoding procedures.
*/
av_always_inline
static int jpeg2000_import_magref_bit(StateVars *stream, const uint8_t *array,
uint32_t length)
{
return jpeg2000_bitbuf_get_bits_lsb(stream, 1, array);
}
/**
* Signal EMB decode.
*/
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)
{
if (context == 0) {
uint8_t sym;
sym = jpeg2000_decode_mel_sym(mel_state, mel_stream, Dcup, Lcup);
if (sym == 0) {
sig_pat[pos] = 0;
res_off[pos] = 0;
emb_pat_k[pos] = 0;
emb_pat_1[pos] = 0;
return 0;
}
}
return jpeg2000_decode_ctx_vlc(s, vlc_stream, vlc_table, Dcup, sig_pat,
res_off, emb_pat_k, emb_pat_1, pos, Pcup,
context);
}
av_always_inline
static int jpeg2000_get_state(int x1, int x2, int width, int shift_by,
const uint8_t *block_states)
{
return (block_states[(x1 + 1) * (width + 2) + (x2 + 1)] >> shift_by) & 1;
}
av_always_inline
static void jpeg2000_modify_state(int x1, int x2, int width,
int value, uint8_t *block_states)
{
block_states[(x1 + 1) * (width + 2) + (x2 + 1)] |= value;
}
av_always_inline
static 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)
{
uint16_t q = 0; // Represents current quad position
uint16_t q1, q2;
uint16_t context1, context2;
uint16_t context = 0;
uint8_t sig_pat[2] = { 0 }; // significance pattern
uint8_t res_off[2] = { 0 }; // residual offset
uint8_t emb_pat_k[2] = { 0 }; // exponent Max Bound pattern K
uint8_t emb_pat_1[2] = { 0 }; // exponent Max Bound pattern 1
uint8_t gamma[2] = { 0 };
uint8_t E_n[2] = { 0 };
uint8_t E_ne[2] = { 0 };
uint8_t E_nw[2] = { 0 };
uint8_t E_nf[2] = { 0 };
uint8_t max_e[2] = { 0 };
uint8_t u_pfx[2] = { 0 };
uint8_t u_sfx[2] = { 0 };
uint8_t u_ext[2] = { 0 };
int32_t u[2] = { 0 };
int32_t U[2] = { 0 }; // exponent bound
int32_t m_n[2] = { 0 };
int32_t known_1[2] = { 0 };
int32_t m[2][4] = { 0 };
int32_t v[2][4] = { 0 };
uint8_t kappa[2] = { 1, 1 };
int ret = 0;
int sp;
uint64_t c;
uint8_t *sigma;
uint32_t *mu;
const uint8_t *vlc_buf = Dcup + Pcup;
/* convert to raster-scan */
const uint16_t is_border_x = width % 2;
const uint16_t is_border_y = height % 2;
const uint16_t quad_width = ff_jpeg2000_ceildivpow2(width, 1);
const uint16_t quad_height = ff_jpeg2000_ceildivpow2(height, 1);
size_t buf_size = 4 * quad_width * quad_height;
uint8_t *sigma_n = av_calloc(buf_size, sizeof(uint8_t));
uint8_t *E = av_calloc(buf_size, sizeof(uint8_t));
uint32_t *mu_n = av_calloc(buf_size, sizeof(uint32_t));
if (!sigma_n || !E || !mu_n) {
ret = AVERROR(ENOMEM);
goto free;
}
sigma = sigma_n;
mu = mu_n;
while (q < quad_width - 1) {
q1 = q;
q2 = q1 + 1;
if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream,
dec_cxt_vlc_table0, Dcup, sig_pat, res_off,
emb_pat_k, emb_pat_1, J2K_Q1, context, Lcup,
Pcup)) < 0)
goto free;
for (int i = 0; i < 4; i++)
sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1;
/* calculate context */
context = sigma_n[4 * q1]; // f
context |= sigma_n[4 * q1 + 1]; // sf
context += sigma_n[4 * q1 + 2] << 1; // w << 1
context += sigma_n[4 * q1 + 3] << 2;
if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream,
dec_cxt_vlc_table0, Dcup, sig_pat, res_off,
emb_pat_k, emb_pat_1, J2K_Q2, context, Lcup,
Pcup)) < 0)
goto free;
for (int i = 0; i < 4; i++)
sigma_n[4 * q2 + i] = (sig_pat[J2K_Q2] >> i) & 1;
/* calculate context for the next quad */
context = sigma_n[4 * q2]; // f
context |= sigma_n[4 * q2 + 1]; // sf
context += sigma_n[4 * q2 + 2] << 1; // w << 1
context += sigma_n[4 * q2 + 3] << 2; // sw << 2
u[0] = 0;
u[1] = 0;
jpeg2000_bitbuf_refill_backwards(vlc_stream, vlc_buf);
if (res_off[J2K_Q1] == 1 && res_off[J2K_Q2] == 1) {
if (jpeg2000_decode_mel_sym(mel_state, mel_stream, Dcup, Lcup) == 1) {
u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_pfx[J2K_Q2] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf);
u_sfx[J2K_Q2] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q2], vlc_buf);
u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf);
u_ext[J2K_Q2] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q2], vlc_buf);
u[J2K_Q1] = 2 + u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] * 4);
u[J2K_Q2] = 2 + u_pfx[J2K_Q2] + u_sfx[J2K_Q2] + (u_ext[J2K_Q2] * 4);
} else {
u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
if (u_pfx[J2K_Q1] > 2) {
u[J2K_Q2] = jpeg2000_bitbuf_get_bits_lsb(vlc_stream, 1, vlc_buf) + 1;
u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf);
u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf);
} else {
u_pfx[J2K_Q2] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf);
u_sfx[J2K_Q2] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q2], vlc_buf);
u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf);
u_ext[J2K_Q2] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q2], vlc_buf);
u[J2K_Q2] = u_pfx[J2K_Q2] + u_sfx[J2K_Q2] + (u_ext[J2K_Q2] * 4);
}
/* See Rec. ITU-T T.814, 7.3.6(3) */
u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] * 4);
}
} else if (res_off[J2K_Q1] == 1 || res_off[J2K_Q2] == 1) {
uint8_t pos = res_off[J2K_Q1] == 1 ? 0 : 1;
u_pfx[pos] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_sfx[pos] = vlc_decode_u_suffix(vlc_stream, u_pfx[pos], vlc_buf);
u_ext[pos] = vlc_decode_u_extension(vlc_stream, u_sfx[pos], vlc_buf);
u[pos] = u_pfx[pos] + u_sfx[pos] + (u_ext[pos] * 4);
}
U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1];
U[J2K_Q2] = kappa[J2K_Q2] + u[J2K_Q2];
for (int i = 0; i < 4; i++) {
m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1);
m[J2K_Q2][i] = sigma_n[4 * q2 + i] * U[J2K_Q2] - ((emb_pat_k[J2K_Q2] >> i) & 1);
}
recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m,
E, mu_n, Dcup, Pcup, pLSB);
recover_mag_sgn(mag_sgn_stream, J2K_Q2, q2, m_n, known_1, emb_pat_1, v, m,
E, mu_n, Dcup, Pcup, pLSB);
q += 2; // Move to the next quad pair
}
if (quad_width % 2 == 1) {
q1 = q;
if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream,
dec_cxt_vlc_table0, Dcup, sig_pat, res_off,
emb_pat_k, emb_pat_1, J2K_Q1, context, Lcup,
Pcup)) < 0)
goto free;
for (int i = 0; i < 4; i++)
sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1;
u[J2K_Q1] = 0;
if (res_off[J2K_Q1] == 1) {
u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf);
u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf);
u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] * 4);
}
U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1];
for (int i = 0; i < 4; i++)
m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1);
recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m,
E, mu_n, Dcup, Pcup, pLSB);
q++; // move to next quad pair
}
/**
* 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.
*/
c = precompute_c(quad_width);
for (int row = 1; row < quad_height; row++) {
while ((q - (row * quad_width)) < quad_width - 1 && q < (quad_height * quad_width)) {
q1 = q;
q2 = q + 1;
context1 = sigma_n[4 * (q1 - quad_width) + 1];
context1 += sigma_n[4 * (q1 - quad_width) + 3] << 2; // ne
if (!is_divisible(q1, c)) {
context1 |= sigma_n[4 * (q1 - quad_width) - 1]; // nw
context1 += (sigma_n[4 * q1 - 1] | sigma_n[4 * q1 - 2]) << 1; // sw | q
}
if (!is_divisible(q1 + 1, c))
context1 |= sigma_n[4 * (q1 - quad_width) + 5] << 2;
if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream,
dec_cxt_vlc_table1, Dcup, sig_pat, res_off,
emb_pat_k, emb_pat_1, J2K_Q1, context1, Lcup,
Pcup))
< 0)
goto free;
for (int i = 0; i < 4; i++)
sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1;
context2 = sigma_n[4 * (q2 - quad_width) + 1];
context2 += sigma_n[4 * (q2 - quad_width) + 3] << 2;
if (!is_divisible(q2, c)) {
context2 |= sigma_n[4 * (q2 - quad_width) - 1];
context2 += (sigma_n[4 * q2 - 1] | sigma_n[4 * q2 - 2]) << 1;
}
if (!is_divisible(q2 + 1, c))
context2 |= sigma_n[4 * (q2 - quad_width) + 5] << 2;
if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream,
dec_cxt_vlc_table1, Dcup, sig_pat, res_off,
emb_pat_k, emb_pat_1, J2K_Q2, context2, Lcup,
Pcup))
< 0)
goto free;
for (int i = 0; i < 4; i++)
sigma_n[4 * q2 + i] = (sig_pat[J2K_Q2] >> i) & 1;
u[J2K_Q1] = 0;
u[J2K_Q2] = 0;
jpeg2000_bitbuf_refill_backwards(vlc_stream, vlc_buf);
if (res_off[J2K_Q1] == 1 && res_off[J2K_Q2] == 1) {
u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_pfx[J2K_Q2] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf);
u_sfx[J2K_Q2] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q2], vlc_buf);
u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf);
u_ext[J2K_Q2] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q2], vlc_buf);
u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] << 2);
u[J2K_Q2] = u_pfx[J2K_Q2] + u_sfx[J2K_Q2] + (u_ext[J2K_Q2] << 2);
} else if (res_off[J2K_Q1] == 1 || res_off[J2K_Q2] == 1) {
uint8_t pos = res_off[J2K_Q1] == 1 ? 0 : 1;
u_pfx[pos] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_sfx[pos] = vlc_decode_u_suffix(vlc_stream, u_pfx[pos], vlc_buf);
u_ext[pos] = vlc_decode_u_extension(vlc_stream, u_sfx[pos], vlc_buf);
u[pos] = u_pfx[pos] + u_sfx[pos] + (u_ext[pos] << 2);
}
sp = sig_pat[J2K_Q1];
gamma[J2K_Q1] = 1;
if (sp == 0 || sp == 1 || sp == 2 || sp == 4 || sp == 8)
gamma[J2K_Q1] = 0;
sp = sig_pat[J2K_Q2];
gamma[J2K_Q2] = 1;
if (sp == 0 || sp == 1 || sp == 2 || sp == 4 || sp == 8)
gamma[J2K_Q2] = 0;
E_n[J2K_Q1] = E[4 * (q1 - quad_width) + 1];
E_n[J2K_Q2] = E[4 * (q2 - quad_width) + 1];
E_ne[J2K_Q1] = E[4 * (q1 - quad_width) + 3];
E_ne[J2K_Q2] = E[4 * (q2 - quad_width) + 3];
E_nw[J2K_Q1] = (!is_divisible(q1, c)) * E[FFMAX((4 * (q1 - quad_width) - 1), 0)];
E_nw[J2K_Q2] = (!is_divisible(q2, c)) * E[FFMAX((4 * (q2 - quad_width) - 1), 0)];
E_nf[J2K_Q1] = (!is_divisible(q1 + 1, c)) * E[4 * (q1 - quad_width) + 5];
E_nf[J2K_Q2] = (!is_divisible(q2 + 1, c)) * E[4 * (q2 - quad_width) + 5];
max_e[J2K_Q1] = FFMAX(E_nw[J2K_Q1], FFMAX3(E_n[J2K_Q1], E_ne[J2K_Q1], E_nf[J2K_Q1]));
max_e[J2K_Q2] = FFMAX(E_nw[J2K_Q2], FFMAX3(E_n[J2K_Q2], E_ne[J2K_Q2], E_nf[J2K_Q2]));
kappa[J2K_Q1] = FFMAX(1, gamma[J2K_Q1] * (max_e[J2K_Q1] - 1));
kappa[J2K_Q2] = FFMAX(1, gamma[J2K_Q2] * (max_e[J2K_Q2] - 1));
U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1];
U[J2K_Q2] = kappa[J2K_Q2] + u[J2K_Q2];
for (int i = 0; i < 4; i++) {
m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1);
m[J2K_Q2][i] = sigma_n[4 * q2 + i] * U[J2K_Q2] - ((emb_pat_k[J2K_Q2] >> i) & 1);
}
recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m,
E, mu_n, Dcup, Pcup, pLSB);
recover_mag_sgn(mag_sgn_stream, J2K_Q2, q2, m_n, known_1, emb_pat_1, v, m,
E, mu_n, Dcup, Pcup, pLSB);
q += 2; // Move to the next quad pair
}
if (quad_width % 2 == 1) {
q1 = q;
/* calculate context for current quad */
context1 = sigma_n[4 * (q1 - quad_width) + 1];
context1 += (sigma_n[4 * (q1 - quad_width) + 3] << 2);
if (!is_divisible(q1, c)) {
context1 |= sigma_n[4 * (q1 - quad_width) - 1];
context1 += (sigma_n[4 * q1 - 1] | sigma_n[4 * q1 - 2]) << 1;
}
if (!is_divisible(q1 + 1, c))
context1 |= sigma_n[4 * (q1 - quad_width) + 5] << 2;
if ((ret = jpeg2000_decode_sig_emb(s, mel_state, mel_stream, vlc_stream,
dec_cxt_vlc_table1, Dcup, sig_pat, res_off,
emb_pat_k, emb_pat_1, J2K_Q1, context1, Lcup,
Pcup)) < 0)
goto free;
for (int i = 0; i < 4; i++)
sigma_n[4 * q1 + i] = (sig_pat[J2K_Q1] >> i) & 1;
u[J2K_Q1] = 0;
/* Recover mag_sgn value */
if (res_off[J2K_Q1] == 1) {
u_pfx[J2K_Q1] = vlc_decode_u_prefix(vlc_stream, vlc_buf);
u_sfx[J2K_Q1] = vlc_decode_u_suffix(vlc_stream, u_pfx[J2K_Q1], vlc_buf);
u_ext[J2K_Q1] = vlc_decode_u_extension(vlc_stream, u_sfx[J2K_Q1], vlc_buf);
u[J2K_Q1] = u_pfx[J2K_Q1] + u_sfx[J2K_Q1] + (u_ext[J2K_Q1] << 2);
}
sp = sig_pat[J2K_Q1];
gamma[J2K_Q1] = 1;
if (sp == 0 || sp == 1 || sp == 2 || sp == 4 || sp == 8)
gamma[J2K_Q1] = 0;
E_n[J2K_Q1] = E[4 * (q1 - quad_width) + 1];
E_ne[J2K_Q1] = E[4 * (q1 - quad_width) + 3];
E_nw[J2K_Q1] = (!is_divisible(q1, c)) * E[FFMAX((4 * (q1 - quad_width) - 1), 0)];
E_nf[J2K_Q1] = (!is_divisible(q1 + 1, c)) * E[4 * (q1 - quad_width) + 5];
max_e[J2K_Q1] = FFMAX(E_nw[J2K_Q1], FFMAX3(E_n[J2K_Q1], E_ne[J2K_Q1], E_nf[J2K_Q1]));
kappa[J2K_Q1] = FFMAX(1, gamma[J2K_Q1] * (max_e[J2K_Q1] - 1));
U[J2K_Q1] = kappa[J2K_Q1] + u[J2K_Q1];
for (int i = 0; i < 4; i++)
m[J2K_Q1][i] = sigma_n[4 * q1 + i] * U[J2K_Q1] - ((emb_pat_k[J2K_Q1] >> i) & 1);
recover_mag_sgn(mag_sgn_stream, J2K_Q1, q1, m_n, known_1, emb_pat_1, v, m,
E, mu_n, Dcup, Pcup, pLSB);
q += 1;
}
}
// convert to raster-scan
for (int y = 0; y < quad_height; y++) {
for (int x = 0; x < quad_width; x++) {
int j1, j2;
int x1, x2 , x3;
j1 = 2 * y;
j2 = 2 * x;
sample_buf[j2 + (j1 * width)] = (int32_t)*mu;
jpeg2000_modify_state(j1, j2, width, *sigma, block_states);
sigma += 1;
mu += 1;
x1 = y != quad_height - 1 || is_border_y == 0;
sample_buf[j2 + ((j1 + 1) * width)] = ((int32_t)*mu) * x1;
jpeg2000_modify_state(j1 + 1, j2, width, (*sigma) * x1, block_states);
sigma += 1;
mu += 1;
x2 = x != quad_width - 1 || is_border_x == 0;
sample_buf[(j2 + 1) + (j1 * width)] = ((int32_t)*mu) * x2;
jpeg2000_modify_state(j1, j2 + 1, width, (*sigma) * x2, block_states);
sigma += 1;
mu += 1;
x3 = x1 | x2;
sample_buf[(j2 + 1) + (j1 + 1) * width] = ((int32_t)*mu) * x3;
jpeg2000_modify_state(j1 + 1, j2 + 1, width, (*sigma) * x3, block_states);
sigma += 1;
mu += 1;
}
}
ret = 1;
free:
av_freep(&sigma_n);
av_freep(&E);
av_freep(&mu_n);
return ret;
}
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)
{
int local_mbr = 0;
local_mbr |= jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_SIGMA, block_states);
local_mbr |= jpeg2000_get_state(i - 1, j + 0, width, HT_SHIFT_SIGMA, block_states);
local_mbr |= jpeg2000_get_state(i - 1, j + 1, width, HT_SHIFT_SIGMA, block_states);
local_mbr |= jpeg2000_get_state(i + 0, j - 1, width, HT_SHIFT_SIGMA, block_states);
local_mbr |= jpeg2000_get_state(i + 0, j + 1, width, HT_SHIFT_SIGMA, block_states);
local_mbr |= jpeg2000_get_state(i + 1, j - 1, width, HT_SHIFT_SIGMA, block_states) * causal_cond;
local_mbr |= jpeg2000_get_state(i + 1, j + 0, width, HT_SHIFT_SIGMA, block_states) * causal_cond;
local_mbr |= jpeg2000_get_state(i + 1, j + 1, width, HT_SHIFT_SIGMA, block_states) * causal_cond;
local_mbr |= jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_SCAN, block_states);
local_mbr |= jpeg2000_get_state(i - 1, j + 0, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i - 1, j - 1, width, HT_SHIFT_SCAN, block_states);
local_mbr |= jpeg2000_get_state(i - 1, j + 1, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i - 1, j + 1, width, HT_SHIFT_SCAN, block_states);
local_mbr |= jpeg2000_get_state(i + 0, j - 1, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i + 0, j - 1, width, HT_SHIFT_SCAN, block_states);
local_mbr |= jpeg2000_get_state(i + 0, j + 1, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i + 0, j + 1, width, HT_SHIFT_SCAN, block_states);
local_mbr |= jpeg2000_get_state(i + 1, j - 1, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i + 1, j - 1, width, HT_SHIFT_SCAN, block_states) * causal_cond;
local_mbr |= jpeg2000_get_state(i + 1, j + 0, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i + 1, j + 0, width, HT_SHIFT_SCAN, block_states) * causal_cond;
local_mbr |= jpeg2000_get_state(i + 1, j + 1, width, HT_SHIFT_REF, block_states) *
jpeg2000_get_state(i + 1, j + 1, width, HT_SHIFT_SCAN, block_states) * causal_cond;
*mbr |= local_mbr;
}
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)
{
for (int j = j_s; j < j_s + width; j++) {
uint32_t mbr_info = 0;
for (int i = i_s; i < i_s + height; i++) {
int modify_state, cond;
uint8_t bit;
uint8_t causal_cond = i != (i_s + height - 1);
int32_t *sp = &sample_buf[j + (i * (stride - 2))];
uint8_t mbr = 0;
if (jpeg2000_get_state(i, j, stride - 2, HT_SHIFT_SIGMA, block_states) == 0)
jpeg2000_calc_mbr(&mbr, i, j, mbr_info & 0x1EF, causal_cond, block_states, stride - 2);
mbr_info >>= 3;
cond = mbr != 0;
bit = jpeg2000_peek_bit(sig_prop, magref_segment, magref_length);
*sp |= (bit * cond) << pLSB;
sig_prop->bits -= cond;
modify_state = (((1 << HT_SHIFT_REF_IND) | (1 << HT_SHIFT_REF)) * cond) | 1 << HT_SHIFT_SCAN;
jpeg2000_modify_state(i, j, stride - 2, modify_state, block_states);
}
}
}
/**
* See procedure decodeSigPropMag at Rec. ITU-T T.814, 7.4.
*/
av_noinline
static 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)
{
StateVars sp_dec;
const uint16_t num_v_stripe = height / 4;
const uint16_t num_h_stripe = width / 4;
int b_width = 4;
int b_height = 4;
int stride = width + 2;
int last_width;
uint16_t i = 0, j = 0;
jpeg2000_init_zero(&sp_dec);
for (int n1 = 0; n1 < num_v_stripe; n1++) {
j = 0;
for (int n2 = 0; n2 < num_h_stripe; n2++) {
jpeg2000_process_stripes_block(&sp_dec, i, j, b_width, b_height, stride,
pLSB, sample_buf, block_states, magref_segment,
magref_length);
j += 4;
}
last_width = width % 4;
if (last_width)
jpeg2000_process_stripes_block(&sp_dec, i, j, last_width, b_height, stride,
pLSB, sample_buf, block_states, magref_segment,
magref_length);
i += 4;
}
/* Decode remaining height stripes */
b_height = height % 4;
j = 0;
for (int n2 = 0; n2 < num_h_stripe; n2++) {
jpeg2000_process_stripes_block(&sp_dec, i, j, b_width, b_height, stride,
pLSB, sample_buf, block_states, magref_segment,
magref_length);
j += 4;
}
last_width = width % 4;
if (last_width)
jpeg2000_process_stripes_block(&sp_dec, i, j, last_width, b_height, stride,
pLSB, sample_buf, block_states, magref_segment,
magref_length);
}
/**
* See procedure decodeSigPropMag at Rec. ITU-T T.814, 7.5.
*/
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)
{
StateVars mag_ref = { 0 };
const uint16_t num_v_stripe = block_height / 4;
uint16_t height = 4;
uint16_t i_start = 0;
int32_t *sp;
jpeg2000_init_mag_ref(&mag_ref, magref_length);
for (int n1 = 0; n1 < num_v_stripe; n1++) {
for (int j = 0; j < width; j++) {
for (int i = i_start; i < i_start + height; i++) {
/**
* We move column wise, going from one quad to another. See
* Rec. ITU-T T.814, Figure 7.
*/
sp = &sample_buf[j + i * width];
if (jpeg2000_get_state(i, j, width, HT_SHIFT_SIGMA, block_states) != 0) {
jpeg2000_modify_state(i, j, width, 1 << HT_SHIFT_REF_IND, block_states);
*sp |= jpeg2000_import_magref_bit(&mag_ref, magref_segment, magref_length) << pLSB;
}
}
}
i_start += 4;
}
height = block_height % 4;
for (int j = 0; j < width; j++) {
for (int i = i_start; i < i_start + height; i++) {
sp = &sample_buf[j + i * width];
if (jpeg2000_get_state(i, j, width, HT_SHIFT_SIGMA, block_states) != 0) {
jpeg2000_modify_state(i, j, width, 1 << HT_SHIFT_REF_IND, block_states);
*sp |= jpeg2000_import_magref_bit(&mag_ref, magref_segment, magref_length) << pLSB;
}
}
}
return 1;
}
int
ff_jpeg2000_decode_htj2k(const Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
int width, int height, int magp, uint8_t roi_shift)
{
uint8_t p0 = 0; // Number of placeholder passes
uint32_t Lcup; // Length of HT cleanup segment
uint32_t Lref; // Length of Refinement segment
uint32_t Scup; // HT cleanup segment suffix length
uint32_t Pcup; // HT cleanup segment prefix length
uint8_t S_blk; // Number of skipped magnitude bitplanes
uint8_t pLSB;
uint8_t *Dcup; // Byte of an HT cleanup segment
uint8_t *Dref; // Byte of an HT refinement segment
int z_blk; // Number of ht coding pass
uint8_t empty_passes;
StateVars mag_sgn; // Magnitude and Sign
StateVars mel; // Adaptive run-length coding
StateVars vlc; // Variable Length coding
StateVars sig_prop; // Significance propagation
MelDecoderState mel_state;
int ret;
/* Temporary buffers */
int32_t *sample_buf = NULL;
uint8_t *block_states = NULL;
int32_t n, val; // Post-processing
int32_t M_b = magp;
/* codeblock size as constrained by Rec. ITU-T T.800, Table A.18 */
av_assert0(width <= 1024U && height <= 1024U);
av_assert0(width * height <= 4096);
av_assert0(width * height > 0);
memset(t1->data, 0, t1->stride * height * sizeof(*t1->data));
memset(t1->flags, 0, t1->stride * (height + 2) * sizeof(*t1->flags));
if (cblk->npasses == 0)
return 0;
if (cblk->npasses > 3)
p0 = 0;
else if (cblk->length == 0)
p0 = 1;
empty_passes = p0 * 3;
z_blk = cblk->npasses - empty_passes;
if (z_blk <= 0)
return 0; // No passes within this set, continue
Lcup = cblk->pass_lengths[0];
Lref = cblk->pass_lengths[1];
if (Lcup < 2) {
av_log(s->avctx, AV_LOG_ERROR,
"Cleanup pass length must be at least 2 bytes in length\n");
return AVERROR_INVALIDDATA;
}
Dcup = cblk->data;
Dref = cblk->data + Lcup; // Dref comes after the refinement segment
S_blk = p0 + cblk->zbp;
pLSB = 30 - S_blk;
Scup = (Dcup[Lcup - 1] << 4) + (Dcup[Lcup - 2] & 0x0F);
if (Scup < 2 || Scup > Lcup || Scup > 4079) {
av_log(s->avctx, AV_LOG_ERROR, "Cleanup pass suffix length is invalid %d\n",
Scup);
ret = AVERROR_INVALIDDATA;
goto free;
}
Pcup = Lcup - Scup;
/* modDcup shall be done before the creation of vlc instance. */
Dcup[Lcup - 1] = 0xFF;
Dcup[Lcup - 2] |= 0x0F;
/* Magnitude and refinement */
jpeg2000_init_zero(&mag_sgn);
jpeg2000_bitbuf_refill_forward(&mag_sgn, Dcup, Pcup);
/* Significance propagation */
jpeg2000_init_zero(&sig_prop);
/* Adaptive run length */
jpeg2000_init_mel(&mel, Pcup);
/* Variable Length coding */
jpeg2000_init_vlc(&vlc, Lcup, Pcup, Dcup);
jpeg2000_init_mel_decoder(&mel_state);
sample_buf = av_calloc((width + 4) * (height + 4), sizeof(int32_t));
block_states = av_calloc((width + 4) * (height + 4), sizeof(uint8_t));
if (!sample_buf || !block_states) {
ret = AVERROR(ENOMEM);
goto free;
}
if ((ret = jpeg2000_decode_ht_cleanup_segment(s, cblk, t1, &mel_state, &mel, &vlc,
&mag_sgn, Dcup, Lcup, Pcup, pLSB, width,
height, sample_buf, block_states)) < 0)
goto free;
if (cblk->npasses > 1)
jpeg2000_decode_sigprop_segment(cblk, width, height, Dref, Lref,
pLSB - 1, sample_buf, block_states);
if (cblk->npasses > 2) {
if (Lref < 2){
av_log(s->avctx,AV_LOG_ERROR,"Invalid magnitude refinement length\n");
ret = AVERROR_INVALIDDATA;
goto free;
}
if ((ret = jpeg2000_decode_magref_segment(width, height, Dref, Lref,
pLSB - 1, sample_buf, block_states)) < 0)
goto free;
}
pLSB = 31 - M_b;
/* Reconstruct the sample values */
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
n = x + (y * t1->stride);
val = sample_buf[x + (y * width)];
/* Convert sign-magnitude to two's complement. */
val = val >> 31 ? 0x80000000 - val : val;
val >>= (pLSB - 1);
t1->data[n] = val;
}
}
free:
av_freep(&sample_buf);
av_freep(&block_states);
return ret;
}
/**
* CtxVLC tables (see Rec. ITU-T T.800, Annex C) as found at
* https://github.com/osamu620/OpenHTJ2K (author: Osamu Watanabe)
*/
static const uint16_t dec_cxt_vlc_table1[1024] = {
0x0016, 0x006A, 0x0046, 0x00DD, 0x0086, 0x888B, 0x0026, 0x444D, 0x0016, 0x00AA, 0x0046, 0x88AD, 0x0086,
0x003A, 0x0026, 0x00DE, 0x0016, 0x00CA, 0x0046, 0x009D, 0x0086, 0x005A, 0x0026, 0x222D, 0x0016, 0x009A,
0x0046, 0x007D, 0x0086, 0x01FD, 0x0026, 0x007E, 0x0016, 0x006A, 0x0046, 0x88CD, 0x0086, 0x888B, 0x0026,
0x111D, 0x0016, 0x00AA, 0x0046, 0x005D, 0x0086, 0x003A, 0x0026, 0x00EE, 0x0016, 0x00CA, 0x0046, 0x00BD,
0x0086, 0x005A, 0x0026, 0x11FF, 0x0016, 0x009A, 0x0046, 0x003D, 0x0086, 0x04ED, 0x0026, 0x2AAF, 0x0016,
0x006A, 0x0046, 0x00DD, 0x0086, 0x888B, 0x0026, 0x444D, 0x0016, 0x00AA, 0x0046, 0x88AD, 0x0086, 0x003A,
0x0026, 0x44EF, 0x0016, 0x00CA, 0x0046, 0x009D, 0x0086, 0x005A, 0x0026, 0x222D, 0x0016, 0x009A, 0x0046,
0x007D, 0x0086, 0x01FD, 0x0026, 0x00BE, 0x0016, 0x006A, 0x0046, 0x88CD, 0x0086, 0x888B, 0x0026, 0x111D,
0x0016, 0x00AA, 0x0046, 0x005D, 0x0086, 0x003A, 0x0026, 0x4CCF, 0x0016, 0x00CA, 0x0046, 0x00BD, 0x0086,
0x005A, 0x0026, 0x00FE, 0x0016, 0x009A, 0x0046, 0x003D, 0x0086, 0x04ED, 0x0026, 0x006F, 0x0002, 0x0088,
0x0002, 0x005C, 0x0002, 0x0018, 0x0002, 0x00DE, 0x0002, 0x0028, 0x0002, 0x009C, 0x0002, 0x004A, 0x0002,
0x007E, 0x0002, 0x0088, 0x0002, 0x00CC, 0x0002, 0x0018, 0x0002, 0x888F, 0x0002, 0x0028, 0x0002, 0x00FE,
0x0002, 0x003A, 0x0002, 0x222F, 0x0002, 0x0088, 0x0002, 0x04FD, 0x0002, 0x0018, 0x0002, 0x00BE, 0x0002,
0x0028, 0x0002, 0x00BF, 0x0002, 0x004A, 0x0002, 0x006E, 0x0002, 0x0088, 0x0002, 0x00AC, 0x0002, 0x0018,
0x0002, 0x444F, 0x0002, 0x0028, 0x0002, 0x00EE, 0x0002, 0x003A, 0x0002, 0x113F, 0x0002, 0x0088, 0x0002,
0x005C, 0x0002, 0x0018, 0x0002, 0x00CF, 0x0002, 0x0028, 0x0002, 0x009C, 0x0002, 0x004A, 0x0002, 0x006F,
0x0002, 0x0088, 0x0002, 0x00CC, 0x0002, 0x0018, 0x0002, 0x009F, 0x0002, 0x0028, 0x0002, 0x00EF, 0x0002,
0x003A, 0x0002, 0x233F, 0x0002, 0x0088, 0x0002, 0x04FD, 0x0002, 0x0018, 0x0002, 0x00AF, 0x0002, 0x0028,
0x0002, 0x44FF, 0x0002, 0x004A, 0x0002, 0x005F, 0x0002, 0x0088, 0x0002, 0x00AC, 0x0002, 0x0018, 0x0002,
0x007F, 0x0002, 0x0028, 0x0002, 0x00DF, 0x0002, 0x003A, 0x0002, 0x111F, 0x0002, 0x0028, 0x0002, 0x005C,
0x0002, 0x008A, 0x0002, 0x00BF, 0x0002, 0x0018, 0x0002, 0x00FE, 0x0002, 0x00CC, 0x0002, 0x007E, 0x0002,
0x0028, 0x0002, 0x8FFF, 0x0002, 0x004A, 0x0002, 0x007F, 0x0002, 0x0018, 0x0002, 0x00DF, 0x0002, 0x00AC,
0x0002, 0x133F, 0x0002, 0x0028, 0x0002, 0x222D, 0x0002, 0x008A, 0x0002, 0x00BE, 0x0002, 0x0018, 0x0002,
0x44EF, 0x0002, 0x2AAD, 0x0002, 0x006E, 0x0002, 0x0028, 0x0002, 0x15FF, 0x0002, 0x004A, 0x0002, 0x009E,
0x0002, 0x0018, 0x0002, 0x00CF, 0x0002, 0x003C, 0x0002, 0x223F, 0x0002, 0x0028, 0x0002, 0x005C, 0x0002,
0x008A, 0x0002, 0x2BBF, 0x0002, 0x0018, 0x0002, 0x04EF, 0x0002, 0x00CC, 0x0002, 0x006F, 0x0002, 0x0028,
0x0002, 0x27FF, 0x0002, 0x004A, 0x0002, 0x009F, 0x0002, 0x0018, 0x0002, 0x00DE, 0x0002, 0x00AC, 0x0002,
0x444F, 0x0002, 0x0028, 0x0002, 0x222D, 0x0002, 0x008A, 0x0002, 0x8AAF, 0x0002, 0x0018, 0x0002, 0x00EE,
0x0002, 0x2AAD, 0x0002, 0x005F, 0x0002, 0x0028, 0x0002, 0x44FF, 0x0002, 0x004A, 0x0002, 0x888F, 0x0002,
0x0018, 0x0002, 0xAAAF, 0x0002, 0x003C, 0x0002, 0x111F, 0x0004, 0x8FFD, 0x0028, 0x005C, 0x0004, 0x00BC,
0x008A, 0x66FF, 0x0004, 0x00CD, 0x0018, 0x111D, 0x0004, 0x009C, 0x003A, 0x8AAF, 0x0004, 0x00FC, 0x0028,
0x133D, 0x0004, 0x00AC, 0x004A, 0x3BBF, 0x0004, 0x2BBD, 0x0018, 0x5FFF, 0x0004, 0x006C, 0x157D, 0x455F,
0x0004, 0x2FFD, 0x0028, 0x222D, 0x0004, 0x22AD, 0x008A, 0x44EF, 0x0004, 0x00CC, 0x0018, 0x4FFF, 0x0004,
0x007C, 0x003A, 0x447F, 0x0004, 0x04DD, 0x0028, 0x233D, 0x0004, 0x009D, 0x004A, 0x00DE, 0x0004, 0x88BD,
0x0018, 0xAFFF, 0x0004, 0x115D, 0x1FFD, 0x444F, 0x0004, 0x8FFD, 0x0028, 0x005C, 0x0004, 0x00BC, 0x008A,
0x8CEF, 0x0004, 0x00CD, 0x0018, 0x111D, 0x0004, 0x009C, 0x003A, 0x888F, 0x0004, 0x00FC, 0x0028, 0x133D,
0x0004, 0x00AC, 0x004A, 0x44DF, 0x0004, 0x2BBD, 0x0018, 0x8AFF, 0x0004, 0x006C, 0x157D, 0x006F, 0x0004,
0x2FFD, 0x0028, 0x222D, 0x0004, 0x22AD, 0x008A, 0x00EE, 0x0004, 0x00CC, 0x0018, 0x2EEF, 0x0004, 0x007C,
0x003A, 0x277F, 0x0004, 0x04DD, 0x0028, 0x233D, 0x0004, 0x009D, 0x004A, 0x1BBF, 0x0004, 0x88BD, 0x0018,
0x37FF, 0x0004, 0x115D, 0x1FFD, 0x333F, 0x0002, 0x0088, 0x0002, 0x02ED, 0x0002, 0x00CA, 0x0002, 0x4CCF,
0x0002, 0x0048, 0x0002, 0x23FF, 0x0002, 0x001A, 0x0002, 0x888F, 0x0002, 0x0088, 0x0002, 0x006C, 0x0002,
0x002A, 0x0002, 0x00AF, 0x0002, 0x0048, 0x0002, 0x22EF, 0x0002, 0x00AC, 0x0002, 0x005F, 0x0002, 0x0088,
0x0002, 0x444D, 0x0002, 0x00CA, 0x0002, 0xCCCF, 0x0002, 0x0048, 0x0002, 0x00FE, 0x0002, 0x001A, 0x0002,
0x006F, 0x0002, 0x0088, 0x0002, 0x005C, 0x0002, 0x002A, 0x0002, 0x009F, 0x0002, 0x0048, 0x0002, 0x00DF,
0x0002, 0x03FD, 0x0002, 0x222F, 0x0002, 0x0088, 0x0002, 0x02ED, 0x0002, 0x00CA, 0x0002, 0x8CCF, 0x0002,
0x0048, 0x0002, 0x11FF, 0x0002, 0x001A, 0x0002, 0x007E, 0x0002, 0x0088, 0x0002, 0x006C, 0x0002, 0x002A,
0x0002, 0x007F, 0x0002, 0x0048, 0x0002, 0x00EE, 0x0002, 0x00AC, 0x0002, 0x003E, 0x0002, 0x0088, 0x0002,
0x444D, 0x0002, 0x00CA, 0x0002, 0x00BE, 0x0002, 0x0048, 0x0002, 0x00BF, 0x0002, 0x001A, 0x0002, 0x003F,
0x0002, 0x0088, 0x0002, 0x005C, 0x0002, 0x002A, 0x0002, 0x009E, 0x0002, 0x0048, 0x0002, 0x00DE, 0x0002,
0x03FD, 0x0002, 0x111F, 0x0004, 0x8AED, 0x0048, 0x888D, 0x0004, 0x00DC, 0x00CA, 0x3FFF, 0x0004, 0xCFFD,
0x002A, 0x003D, 0x0004, 0x00BC, 0x005A, 0x8DDF, 0x0004, 0x8FFD, 0x0048, 0x006C, 0x0004, 0x027D, 0x008A,
0x99FF, 0x0004, 0x00EC, 0x00FA, 0x003C, 0x0004, 0x00AC, 0x001A, 0x009F, 0x0004, 0x2FFD, 0x0048, 0x007C,
0x0004, 0x44CD, 0x00CA, 0x67FF, 0x0004, 0x1FFD, 0x002A, 0x444D, 0x0004, 0x00AD, 0x005A, 0x8CCF, 0x0004,
0x4FFD, 0x0048, 0x445D, 0x0004, 0x01BD, 0x008A, 0x4EEF, 0x0004, 0x45DD, 0x00FA, 0x111D, 0x0004, 0x009C,
0x001A, 0x222F, 0x0004, 0x8AED, 0x0048, 0x888D, 0x0004, 0x00DC, 0x00CA, 0xAFFF, 0x0004, 0xCFFD, 0x002A,
0x003D, 0x0004, 0x00BC, 0x005A, 0x11BF, 0x0004, 0x8FFD, 0x0048, 0x006C, 0x0004, 0x027D, 0x008A, 0x22EF,
0x0004, 0x00EC, 0x00FA, 0x003C, 0x0004, 0x00AC, 0x001A, 0x227F, 0x0004, 0x2FFD, 0x0048, 0x007C, 0x0004,
0x44CD, 0x00CA, 0x5DFF, 0x0004, 0x1FFD, 0x002A, 0x444D, 0x0004, 0x00AD, 0x005A, 0x006F, 0x0004, 0x4FFD,
0x0048, 0x445D, 0x0004, 0x01BD, 0x008A, 0x11DF, 0x0004, 0x45DD, 0x00FA, 0x111D, 0x0004, 0x009C, 0x001A,
0x155F, 0x0006, 0x00FC, 0x0018, 0x111D, 0x0048, 0x888D, 0x00AA, 0x4DDF, 0x0006, 0x2AAD, 0x005A, 0x67FF,
0x0028, 0x223D, 0x00BC, 0xAAAF, 0x0006, 0x00EC, 0x0018, 0x5FFF, 0x0048, 0x006C, 0x008A, 0xCCCF, 0x0006,
0x009D, 0x00CA, 0x44EF, 0x0028, 0x003C, 0x8FFD, 0x137F, 0x0006, 0x8EED, 0x0018, 0x1FFF, 0x0048, 0x007C,
0x00AA, 0x4CCF, 0x0006, 0x227D, 0x005A, 0x1DDF, 0x0028, 0x444D, 0x4FFD, 0x155F, 0x0006, 0x00DC, 0x0018,
0x2EEF, 0x0048, 0x445D, 0x008A, 0x22BF, 0x0006, 0x009C, 0x00CA, 0x8CDF, 0x0028, 0x222D, 0x2FFD, 0x226F,
0x0006, 0x00FC, 0x0018, 0x111D, 0x0048, 0x888D, 0x00AA, 0x1BBF, 0x0006, 0x2AAD, 0x005A, 0x33FF, 0x0028,
0x223D, 0x00BC, 0x8AAF, 0x0006, 0x00EC, 0x0018, 0x9BFF, 0x0048, 0x006C, 0x008A, 0x8ABF, 0x0006, 0x009D,
0x00CA, 0x4EEF, 0x0028, 0x003C, 0x8FFD, 0x466F, 0x0006, 0x8EED, 0x0018, 0xCFFF, 0x0048, 0x007C, 0x00AA,
0x8CCF, 0x0006, 0x227D, 0x005A, 0xAEEF, 0x0028, 0x444D, 0x4FFD, 0x477F, 0x0006, 0x00DC, 0x0018, 0xAFFF,
0x0048, 0x445D, 0x008A, 0x2BBF, 0x0006, 0x009C, 0x00CA, 0x44DF, 0x0028, 0x222D, 0x2FFD, 0x133F, 0x00F6,
0xAFFD, 0x1FFB, 0x003C, 0x0008, 0x23BD, 0x007A, 0x11DF, 0x00F6, 0x45DD, 0x2FFB, 0x4EEF, 0x00DA, 0x177D,
0xCFFD, 0x377F, 0x00F6, 0x3FFD, 0x8FFB, 0x111D, 0x0008, 0x009C, 0x005A, 0x1BBF, 0x00F6, 0x00CD, 0x00BA,
0x8DDF, 0x4FFB, 0x006C, 0x9BFD, 0x455F, 0x00F6, 0x67FD, 0x1FFB, 0x002C, 0x0008, 0x00AC, 0x007A, 0x009F,
0x00F6, 0x00AD, 0x2FFB, 0x7FFF, 0x00DA, 0x004C, 0x5FFD, 0x477F, 0x00F6, 0x00EC, 0x8FFB, 0x001C, 0x0008,
0x008C, 0x005A, 0x888F, 0x00F6, 0x00CC, 0x00BA, 0x2EEF, 0x4FFB, 0x115D, 0x8AED, 0x113F, 0x00F6, 0xAFFD,
0x1FFB, 0x003C, 0x0008, 0x23BD, 0x007A, 0x1DDF, 0x00F6, 0x45DD, 0x2FFB, 0xBFFF, 0x00DA, 0x177D, 0xCFFD,
0x447F, 0x00F6, 0x3FFD, 0x8FFB, 0x111D, 0x0008, 0x009C, 0x005A, 0x277F, 0x00F6, 0x00CD, 0x00BA, 0x22EF,
0x4FFB, 0x006C, 0x9BFD, 0x444F, 0x00F6, 0x67FD, 0x1FFB, 0x002C, 0x0008, 0x00AC, 0x007A, 0x11BF, 0x00F6,
0x00AD, 0x2FFB, 0xFFFF, 0x00DA, 0x004C, 0x5FFD, 0x233F, 0x00F6, 0x00EC, 0x8FFB, 0x001C, 0x0008, 0x008C,
0x005A, 0x006F, 0x00F6, 0x00CC, 0x00BA, 0x8BBF, 0x4FFB, 0x115D, 0x8AED, 0x222F};
static const uint16_t dec_cxt_vlc_table0[1024] = {
0x0026, 0x00AA, 0x0046, 0x006C, 0x0086, 0x8AED, 0x0018, 0x8DDF, 0x0026, 0x01BD, 0x0046, 0x5FFF, 0x0086,
0x027D, 0x005A, 0x155F, 0x0026, 0x003A, 0x0046, 0x444D, 0x0086, 0x4CCD, 0x0018, 0xCCCF, 0x0026, 0x2EFD,
0x0046, 0x99FF, 0x0086, 0x009C, 0x00CA, 0x133F, 0x0026, 0x00AA, 0x0046, 0x445D, 0x0086, 0x8CCD, 0x0018,
0x11DF, 0x0026, 0x4FFD, 0x0046, 0xCFFF, 0x0086, 0x009D, 0x005A, 0x007E, 0x0026, 0x003A, 0x0046, 0x1FFF,
0x0086, 0x88AD, 0x0018, 0x00BE, 0x0026, 0x8FFD, 0x0046, 0x4EEF, 0x0086, 0x888D, 0x00CA, 0x111F, 0x0026,
0x00AA, 0x0046, 0x006C, 0x0086, 0x8AED, 0x0018, 0x45DF, 0x0026, 0x01BD, 0x0046, 0x22EF, 0x0086, 0x027D,
0x005A, 0x227F, 0x0026, 0x003A, 0x0046, 0x444D, 0x0086, 0x4CCD, 0x0018, 0x11BF, 0x0026, 0x2EFD, 0x0046,
0x00FE, 0x0086, 0x009C, 0x00CA, 0x223F, 0x0026, 0x00AA, 0x0046, 0x445D, 0x0086, 0x8CCD, 0x0018, 0x00DE,
0x0026, 0x4FFD, 0x0046, 0xABFF, 0x0086, 0x009D, 0x005A, 0x006F, 0x0026, 0x003A, 0x0046, 0x6EFF, 0x0086,
0x88AD, 0x0018, 0x2AAF, 0x0026, 0x8FFD, 0x0046, 0x00EE, 0x0086, 0x888D, 0x00CA, 0x222F, 0x0004, 0x00CA,
0x0088, 0x027D, 0x0004, 0x4CCD, 0x0028, 0x00FE, 0x0004, 0x2AFD, 0x0048, 0x005C, 0x0004, 0x009D, 0x0018,
0x00DE, 0x0004, 0x01BD, 0x0088, 0x006C, 0x0004, 0x88AD, 0x0028, 0x11DF, 0x0004, 0x8AED, 0x0048, 0x003C,
0x0004, 0x888D, 0x0018, 0x111F, 0x0004, 0x00CA, 0x0088, 0x006D, 0x0004, 0x88CD, 0x0028, 0x88FF, 0x0004,
0x8BFD, 0x0048, 0x444D, 0x0004, 0x009C, 0x0018, 0x00BE, 0x0004, 0x4EFD, 0x0088, 0x445D, 0x0004, 0x00AC,
0x0028, 0x00EE, 0x0004, 0x45DD, 0x0048, 0x222D, 0x0004, 0x003D, 0x0018, 0x007E, 0x0004, 0x00CA, 0x0088,
0x027D, 0x0004, 0x4CCD, 0x0028, 0x1FFF, 0x0004, 0x2AFD, 0x0048, 0x005C, 0x0004, 0x009D, 0x0018, 0x11BF,
0x0004, 0x01BD, 0x0088, 0x006C, 0x0004, 0x88AD, 0x0028, 0x22EF, 0x0004, 0x8AED, 0x0048, 0x003C, 0x0004,
0x888D, 0x0018, 0x227F, 0x0004, 0x00CA, 0x0088, 0x006D, 0x0004, 0x88CD, 0x0028, 0x4EEF, 0x0004, 0x8BFD,
0x0048, 0x444D, 0x0004, 0x009C, 0x0018, 0x2AAF, 0x0004, 0x4EFD, 0x0088, 0x445D, 0x0004, 0x00AC, 0x0028,
0x8DDF, 0x0004, 0x45DD, 0x0048, 0x222D, 0x0004, 0x003D, 0x0018, 0x155F, 0x0004, 0x005A, 0x0088, 0x006C,
0x0004, 0x88DD, 0x0028, 0x23FF, 0x0004, 0x11FD, 0x0048, 0x444D, 0x0004, 0x00AD, 0x0018, 0x00BE, 0x0004,
0x137D, 0x0088, 0x155D, 0x0004, 0x00CC, 0x0028, 0x00DE, 0x0004, 0x02ED, 0x0048, 0x111D, 0x0004, 0x009D,
0x0018, 0x007E, 0x0004, 0x005A, 0x0088, 0x455D, 0x0004, 0x44CD, 0x0028, 0x00EE, 0x0004, 0x1FFD, 0x0048,
0x003C, 0x0004, 0x00AC, 0x0018, 0x555F, 0x0004, 0x47FD, 0x0088, 0x113D, 0x0004, 0x02BD, 0x0028, 0x477F,
0x0004, 0x4CDD, 0x0048, 0x8FFF, 0x0004, 0x009C, 0x0018, 0x222F, 0x0004, 0x005A, 0x0088, 0x006C, 0x0004,
0x88DD, 0x0028, 0x00FE, 0x0004, 0x11FD, 0x0048, 0x444D, 0x0004, 0x00AD, 0x0018, 0x888F, 0x0004, 0x137D,
0x0088, 0x155D, 0x0004, 0x00CC, 0x0028, 0x8CCF, 0x0004, 0x02ED, 0x0048, 0x111D, 0x0004, 0x009D, 0x0018,
0x006F, 0x0004, 0x005A, 0x0088, 0x455D, 0x0004, 0x44CD, 0x0028, 0x1DDF, 0x0004, 0x1FFD, 0x0048, 0x003C,
0x0004, 0x00AC, 0x0018, 0x227F, 0x0004, 0x47FD, 0x0088, 0x113D, 0x0004, 0x02BD, 0x0028, 0x22BF, 0x0004,
0x4CDD, 0x0048, 0x22EF, 0x0004, 0x009C, 0x0018, 0x233F, 0x0006, 0x4DDD, 0x4FFB, 0xCFFF, 0x0018, 0x113D,
0x005A, 0x888F, 0x0006, 0x23BD, 0x008A, 0x00EE, 0x002A, 0x155D, 0xAAFD, 0x277F, 0x0006, 0x44CD, 0x8FFB,
0x44EF, 0x0018, 0x467D, 0x004A, 0x2AAF, 0x0006, 0x00AC, 0x555B, 0x99DF, 0x1FFB, 0x003C, 0x5FFD, 0x266F,
0x0006, 0x1DDD, 0x4FFB, 0x6EFF, 0x0018, 0x177D, 0x005A, 0x1BBF, 0x0006, 0x88AD, 0x008A, 0x5DDF, 0x002A,
0x444D, 0x2FFD, 0x667F, 0x0006, 0x00CC, 0x8FFB, 0x2EEF, 0x0018, 0x455D, 0x004A, 0x119F, 0x0006, 0x009C,
0x555B, 0x8CCF, 0x1FFB, 0x111D, 0x8CED, 0x006E, 0x0006, 0x4DDD, 0x4FFB, 0x3FFF, 0x0018, 0x113D, 0x005A,
0x11BF, 0x0006, 0x23BD, 0x008A, 0x8DDF, 0x002A, 0x155D, 0xAAFD, 0x222F, 0x0006, 0x44CD, 0x8FFB, 0x00FE,
0x0018, 0x467D, 0x004A, 0x899F, 0x0006, 0x00AC, 0x555B, 0x00DE, 0x1FFB, 0x003C, 0x5FFD, 0x446F, 0x0006,
0x1DDD, 0x4FFB, 0x9BFF, 0x0018, 0x177D, 0x005A, 0x00BE, 0x0006, 0x88AD, 0x008A, 0xCDDF, 0x002A, 0x444D,
0x2FFD, 0x007E, 0x0006, 0x00CC, 0x8FFB, 0x4EEF, 0x0018, 0x455D, 0x004A, 0x377F, 0x0006, 0x009C, 0x555B,
0x8BBF, 0x1FFB, 0x111D, 0x8CED, 0x233F, 0x0004, 0x00AA, 0x0088, 0x047D, 0x0004, 0x01DD, 0x0028, 0x11DF,
0x0004, 0x27FD, 0x0048, 0x005C, 0x0004, 0x8AAD, 0x0018, 0x2BBF, 0x0004, 0x009C, 0x0088, 0x006C, 0x0004,
0x00CC, 0x0028, 0x00EE, 0x0004, 0x8CED, 0x0048, 0x222D, 0x0004, 0x888D, 0x0018, 0x007E, 0x0004, 0x00AA,
0x0088, 0x006D, 0x0004, 0x88CD, 0x0028, 0x00FE, 0x0004, 0x19FD, 0x0048, 0x003C, 0x0004, 0x2AAD, 0x0018,
0xAAAF, 0x0004, 0x8BFD, 0x0088, 0x005D, 0x0004, 0x00BD, 0x0028, 0x4CCF, 0x0004, 0x44ED, 0x0048, 0x4FFF,
0x0004, 0x223D, 0x0018, 0x111F, 0x0004, 0x00AA, 0x0088, 0x047D, 0x0004, 0x01DD, 0x0028, 0x99FF, 0x0004,
0x27FD, 0x0048, 0x005C, 0x0004, 0x8AAD, 0x0018, 0x00BE, 0x0004, 0x009C, 0x0088, 0x006C, 0x0004, 0x00CC,
0x0028, 0x00DE, 0x0004, 0x8CED, 0x0048, 0x222D, 0x0004, 0x888D, 0x0018, 0x444F, 0x0004, 0x00AA, 0x0088,
0x006D, 0x0004, 0x88CD, 0x0028, 0x2EEF, 0x0004, 0x19FD, 0x0048, 0x003C, 0x0004, 0x2AAD, 0x0018, 0x447F,
0x0004, 0x8BFD, 0x0088, 0x005D, 0x0004, 0x00BD, 0x0028, 0x009F, 0x0004, 0x44ED, 0x0048, 0x67FF, 0x0004,
0x223D, 0x0018, 0x133F, 0x0006, 0x00CC, 0x008A, 0x9DFF, 0x2FFB, 0x467D, 0x1FFD, 0x99BF, 0x0006, 0x2AAD,
0x002A, 0x66EF, 0x4FFB, 0x005C, 0x2EED, 0x377F, 0x0006, 0x89BD, 0x004A, 0x00FE, 0x8FFB, 0x006C, 0x67FD,
0x889F, 0x0006, 0x888D, 0x001A, 0x5DDF, 0x00AA, 0x222D, 0x89DD, 0x444F, 0x0006, 0x2BBD, 0x008A, 0xCFFF,
0x2FFB, 0x226D, 0x009C, 0x00BE, 0x0006, 0xAAAD, 0x002A, 0x1DDF, 0x4FFB, 0x003C, 0x4DDD, 0x466F, 0x0006,
0x8AAD, 0x004A, 0xAEEF, 0x8FFB, 0x445D, 0x8EED, 0x177F, 0x0006, 0x233D, 0x001A, 0x4CCF, 0x00AA, 0xAFFF,
0x88CD, 0x133F, 0x0006, 0x00CC, 0x008A, 0x77FF, 0x2FFB, 0x467D, 0x1FFD, 0x3BBF, 0x0006, 0x2AAD, 0x002A,
0x00EE, 0x4FFB, 0x005C, 0x2EED, 0x007E, 0x0006, 0x89BD, 0x004A, 0x4EEF, 0x8FFB, 0x006C, 0x67FD, 0x667F,
0x0006, 0x888D, 0x001A, 0x00DE, 0x00AA, 0x222D, 0x89DD, 0x333F, 0x0006, 0x2BBD, 0x008A, 0x57FF, 0x2FFB,
0x226D, 0x009C, 0x199F, 0x0006, 0xAAAD, 0x002A, 0x99DF, 0x4FFB, 0x003C, 0x4DDD, 0x155F, 0x0006, 0x8AAD,
0x004A, 0xCEEF, 0x8FFB, 0x445D, 0x8EED, 0x277F, 0x0006, 0x233D, 0x001A, 0x1BBF, 0x00AA, 0x3FFF, 0x88CD,
0x111F, 0x0006, 0x45DD, 0x2FFB, 0x111D, 0x0018, 0x467D, 0x8FFD, 0xCCCF, 0x0006, 0x19BD, 0x004A, 0x22EF,
0x002A, 0x222D, 0x3FFD, 0x888F, 0x0006, 0x00CC, 0x008A, 0x00FE, 0x0018, 0x115D, 0xCFFD, 0x8AAF, 0x0006,
0x00AC, 0x003A, 0x8CDF, 0x1FFB, 0x133D, 0x66FD, 0x466F, 0x0006, 0x8CCD, 0x2FFB, 0x5FFF, 0x0018, 0x006C,
0x4FFD, 0xABBF, 0x0006, 0x22AD, 0x004A, 0x00EE, 0x002A, 0x233D, 0xAEFD, 0x377F, 0x0006, 0x2BBD, 0x008A,
0x55DF, 0x0018, 0x005C, 0x177D, 0x119F, 0x0006, 0x009C, 0x003A, 0x4CCF, 0x1FFB, 0x333D, 0x8EED, 0x444F,
0x0006, 0x45DD, 0x2FFB, 0x111D, 0x0018, 0x467D, 0x8FFD, 0x99BF, 0x0006, 0x19BD, 0x004A, 0x2EEF, 0x002A,
0x222D, 0x3FFD, 0x667F, 0x0006, 0x00CC, 0x008A, 0x4EEF, 0x0018, 0x115D, 0xCFFD, 0x899F, 0x0006, 0x00AC,
0x003A, 0x00DE, 0x1FFB, 0x133D, 0x66FD, 0x226F, 0x0006, 0x8CCD, 0x2FFB, 0x9BFF, 0x0018, 0x006C, 0x4FFD,
0x00BE, 0x0006, 0x22AD, 0x004A, 0x1DDF, 0x002A, 0x233D, 0xAEFD, 0x007E, 0x0006, 0x2BBD, 0x008A, 0xCEEF,
0x0018, 0x005C, 0x177D, 0x277F, 0x0006, 0x009C, 0x003A, 0x8BBF, 0x1FFB, 0x333D, 0x8EED, 0x455F, 0x1FF9,
0x1DDD, 0xAFFB, 0x00DE, 0x8FF9, 0x001C, 0xFFFB, 0x477F, 0x4FF9, 0x177D, 0x3FFB, 0x3BBF, 0x2FF9, 0xAEEF,
0x8EED, 0x444F, 0x1FF9, 0x22AD, 0x000A, 0x8BBF, 0x8FF9, 0x00FE, 0xCFFD, 0x007E, 0x4FF9, 0x115D, 0x5FFB,
0x577F, 0x2FF9, 0x8DDF, 0x2EED, 0x333F, 0x1FF9, 0x2BBD, 0xAFFB, 0x88CF, 0x8FF9, 0xBFFF, 0xFFFB, 0x377F,
0x4FF9, 0x006D, 0x3FFB, 0x00BE, 0x2FF9, 0x66EF, 0x9FFD, 0x133F, 0x1FF9, 0x009D, 0x000A, 0xABBF, 0x8FF9,
0xDFFF, 0x6FFD, 0x006E, 0x4FF9, 0x002C, 0x5FFB, 0x888F, 0x2FF9, 0xCDDF, 0x4DDD, 0x222F, 0x1FF9, 0x1DDD,
0xAFFB, 0x4CCF, 0x8FF9, 0x001C, 0xFFFB, 0x277F, 0x4FF9, 0x177D, 0x3FFB, 0x99BF, 0x2FF9, 0xCEEF, 0x8EED,
0x004E, 0x1FF9, 0x22AD, 0x000A, 0x00AE, 0x8FF9, 0x7FFF, 0xCFFD, 0x005E, 0x4FF9, 0x115D, 0x5FFB, 0x009E,
0x2FF9, 0x5DDF, 0x2EED, 0x003E, 0x1FF9, 0x2BBD, 0xAFFB, 0x00CE, 0x8FF9, 0xEFFF, 0xFFFB, 0x667F, 0x4FF9,
0x006D, 0x3FFB, 0x8AAF, 0x2FF9, 0x00EE, 0x9FFD, 0x233F, 0x1FF9, 0x009D, 0x000A, 0x1BBF, 0x8FF9, 0x4EEF,
0x6FFD, 0x455F, 0x4FF9, 0x002C, 0x5FFB, 0x008E, 0x2FF9, 0x99DF, 0x4DDD, 0x111F};
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