--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/openjpeg/src/lib/openjp2/t1.h	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,268 @@
+/*
+ * The copyright in this software is being made available under the 2-clauses
+ * BSD License, included below. This software may be subject to other third
+ * party and contributor rights, including patent rights, and no such rights
+ * are granted under this license.
+ *
+ * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
+ * Copyright (c) 2002-2014, Professor Benoit Macq
+ * Copyright (c) 2001-2003, David Janssens
+ * Copyright (c) 2002-2003, Yannick Verschueren
+ * Copyright (c) 2003-2007, Francois-Olivier Devaux
+ * Copyright (c) 2003-2014, Antonin Descampe
+ * Copyright (c) 2005, Herve Drolon, FreeImage Team
+ * Copyright (c) 2012, Carl Hetherington
+ * Copyright (c) 2017, IntoPIX SA <support@intopix.com>
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * 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 OWNER 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.
+ */
+#ifndef OPJ_T1_H
+#define OPJ_T1_H
+/**
+@file t1.h
+@brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
+
+The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
+in T1.C are used by some function in TCD.C.
+*/
+
+/** @defgroup T1 T1 - Implementation of the tier-1 coding */
+/*@{*/
+
+/* ----------------------------------------------------------------------- */
+#define T1_NMSEDEC_BITS 7
+
+#define T1_NUMCTXS_ZC  9
+#define T1_NUMCTXS_SC  5
+#define T1_NUMCTXS_MAG 3
+#define T1_NUMCTXS_AGG 1
+#define T1_NUMCTXS_UNI 1
+
+#define T1_CTXNO_ZC  0
+#define T1_CTXNO_SC  (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
+#define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
+#define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
+#define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
+#define T1_NUMCTXS   (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
+
+#define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
+
+#define T1_TYPE_MQ 0    /**< Normal coding using entropy coder */
+#define T1_TYPE_RAW 1   /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
+
+/* BEGINNING of flags that apply to opj_flag_t */
+/** We hold the state of individual data points for the T1 encoder using
+ *  a single 32-bit flags word to hold the state of 4 data points.  This corresponds
+ *  to the 4-point-high columns that the data is processed in.
+ *
+ *  These \#defines declare the layout of a 32-bit flags word.
+ *
+ *  This is currently done for encoding only.
+ *  The values must NOT be changed, otherwise this is going to break a lot of
+ *  assumptions.
+ */
+
+/* SIGMA: significance state (3 cols x 6 rows)
+ * CHI:   state for negative sample value (1 col x 6 rows)
+ * MU:    state for visited in refinement pass (1 col x 4 rows)
+ * PI:    state for visited in significance pass (1 col * 4 rows)
+ */
+
+#define T1_SIGMA_0  (1U << 0)
+#define T1_SIGMA_1  (1U << 1)
+#define T1_SIGMA_2  (1U << 2)
+#define T1_SIGMA_3  (1U << 3)
+#define T1_SIGMA_4  (1U << 4)
+#define T1_SIGMA_5  (1U << 5)
+#define T1_SIGMA_6  (1U << 6)
+#define T1_SIGMA_7  (1U << 7)
+#define T1_SIGMA_8  (1U << 8)
+#define T1_SIGMA_9  (1U << 9)
+#define T1_SIGMA_10 (1U << 10)
+#define T1_SIGMA_11 (1U << 11)
+#define T1_SIGMA_12 (1U << 12)
+#define T1_SIGMA_13 (1U << 13)
+#define T1_SIGMA_14 (1U << 14)
+#define T1_SIGMA_15 (1U << 15)
+#define T1_SIGMA_16 (1U << 16)
+#define T1_SIGMA_17 (1U << 17)
+
+#define T1_CHI_0    (1U << 18)
+#define T1_CHI_0_I  18
+#define T1_CHI_1    (1U << 19)
+#define T1_CHI_1_I  19
+#define T1_MU_0     (1U << 20)
+#define T1_PI_0     (1U << 21)
+#define T1_CHI_2    (1U << 22)
+#define T1_CHI_2_I  22
+#define T1_MU_1     (1U << 23)
+#define T1_PI_1     (1U << 24)
+#define T1_CHI_3    (1U << 25)
+#define T1_MU_2     (1U << 26)
+#define T1_PI_2     (1U << 27)
+#define T1_CHI_4    (1U << 28)
+#define T1_MU_3     (1U << 29)
+#define T1_PI_3     (1U << 30)
+#define T1_CHI_5    (1U << 31)
+#define T1_CHI_5_I  31
+
+/** As an example, the bits T1_SIGMA_3, T1_SIGMA_4 and T1_SIGMA_5
+ *  indicate the significance state of the west neighbour of data point zero
+ *  of our four, the point itself, and its east neighbour respectively.
+ *  Many of the bits are arranged so that given a flags word, you can
+ *  look at the values for the data point 0, then shift the flags
+ *  word right by 3 bits and look at the same bit positions to see the
+ *  values for data point 1.
+ *
+ *  The \#defines below help a bit with this; say you have a flags word
+ *  f, you can do things like
+ *
+ *  (f & T1_SIGMA_THIS)
+ *
+ *  to see the significance bit of data point 0, then do
+ *
+ *  ((f >> 3) & T1_SIGMA_THIS)
+ *
+ *  to see the significance bit of data point 1.
+ */
+
+#define T1_SIGMA_NW   T1_SIGMA_0
+#define T1_SIGMA_N    T1_SIGMA_1
+#define T1_SIGMA_NE   T1_SIGMA_2
+#define T1_SIGMA_W    T1_SIGMA_3
+#define T1_SIGMA_THIS T1_SIGMA_4
+#define T1_SIGMA_E    T1_SIGMA_5
+#define T1_SIGMA_SW   T1_SIGMA_6
+#define T1_SIGMA_S    T1_SIGMA_7
+#define T1_SIGMA_SE   T1_SIGMA_8
+#define T1_SIGMA_NEIGHBOURS (T1_SIGMA_NW | T1_SIGMA_N | T1_SIGMA_NE | T1_SIGMA_W | T1_SIGMA_E | T1_SIGMA_SW | T1_SIGMA_S | T1_SIGMA_SE)
+
+#define T1_CHI_THIS   T1_CHI_1
+#define T1_CHI_THIS_I T1_CHI_1_I
+#define T1_MU_THIS    T1_MU_0
+#define T1_PI_THIS    T1_PI_0
+#define T1_CHI_S      T1_CHI_2
+
+#define T1_LUT_SGN_W (1U << 0)
+#define T1_LUT_SIG_N (1U << 1)
+#define T1_LUT_SGN_E (1U << 2)
+#define T1_LUT_SIG_W (1U << 3)
+#define T1_LUT_SGN_N (1U << 4)
+#define T1_LUT_SIG_E (1U << 5)
+#define T1_LUT_SGN_S (1U << 6)
+#define T1_LUT_SIG_S (1U << 7)
+/* END of flags that apply to opj_flag_t */
+
+/* ----------------------------------------------------------------------- */
+
+/** Flags for 4 consecutive rows of a column */
+typedef OPJ_UINT32 opj_flag_t;
+
+/**
+Tier-1 coding (coding of code-block coefficients)
+*/
+typedef struct opj_t1 {
+
+    /** MQC component */
+    opj_mqc_t mqc;
+
+    OPJ_INT32  *data;
+    /** Flags used by decoder and encoder.
+     * Such that flags[1+0] is for state of col=0,row=0..3,
+       flags[1+1] for col=1, row=0..3, flags[1+flags_stride] for col=0,row=4..7, ...
+       This array avoids too much cache trashing when processing by 4 vertical samples
+       as done in the various decoding steps. */
+    opj_flag_t *flags;
+
+    OPJ_UINT32 w;
+    OPJ_UINT32 h;
+    OPJ_UINT32 datasize;
+    OPJ_UINT32 flagssize;
+    OPJ_BOOL   encoder;
+
+    /* The 3 variables below are only used by the decoder */
+    /* set to TRUE in multithreaded context */
+    OPJ_BOOL     mustuse_cblkdatabuffer;
+    /* Temporary buffer to concatenate all chunks of a codebock */
+    OPJ_BYTE    *cblkdatabuffer;
+    /* Maximum size available in cblkdatabuffer */
+    OPJ_UINT32   cblkdatabuffersize;
+} opj_t1_t;
+
+/** @name Exported functions */
+/*@{*/
+/* ----------------------------------------------------------------------- */
+
+/**
+Encode the code-blocks of a tile
+@param tcd TCD handle
+@param tile The tile to encode
+@param tcp Tile coding parameters
+@param mct_norms  FIXME DOC
+@param mct_numcomps Number of components used for MCT
+*/
+OPJ_BOOL opj_t1_encode_cblks(opj_tcd_t* tcd,
+                             opj_tcd_tile_t *tile,
+                             opj_tcp_t *tcp,
+                             const OPJ_FLOAT64 * mct_norms,
+                             OPJ_UINT32 mct_numcomps);
+
+/**
+Decode the code-blocks of a tile
+@param tcd TCD handle
+@param pret Pointer to return value
+@param tilec The tile to decode
+@param tccp Tile coding parameters
+@param p_manager the event manager
+@param p_manager_mutex mutex for the event manager
+@param check_pterm whether PTERM correct termination should be checked
+*/
+void opj_t1_decode_cblks(opj_tcd_t* tcd,
+                         volatile OPJ_BOOL* pret,
+                         opj_tcd_tilecomp_t* tilec,
+                         opj_tccp_t* tccp,
+                         opj_event_mgr_t *p_manager,
+                         opj_mutex_t* p_manager_mutex,
+                         OPJ_BOOL check_pterm);
+
+
+
+/**
+ * Creates a new Tier 1 handle
+ * and initializes the look-up tables of the Tier-1 coder/decoder
+ * @return a new T1 handle if successful, returns NULL otherwise
+*/
+opj_t1_t* opj_t1_create(OPJ_BOOL isEncoder);
+
+/**
+ * Destroys a previously created T1 handle
+ *
+ * @param p_t1 Tier 1 handle to destroy
+*/
+void opj_t1_destroy(opj_t1_t *p_t1);
+/* ----------------------------------------------------------------------- */
+/*@}*/
+
+/*@}*/
+
+#endif /* OPJ_T1_H */