/*
 * 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) 2007, Callum Lerwick <seg@haxxed.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.
 */

#include "opj_includes.h"
#include "t1_luts.h"

/** @defgroup T1 T1 - Implementation of the tier-1 coding */
/*@{*/

/** @name Local static functions */
/*@{*/

static INLINE OPJ_BYTE opj_t1_getctxno_zc(OPJ_UINT32 f, OPJ_UINT32 orient);
static OPJ_BYTE opj_t1_getctxno_sc(OPJ_UINT32 f);
static INLINE OPJ_UINT32 opj_t1_getctxno_mag(OPJ_UINT32 f);
static OPJ_BYTE opj_t1_getspb(OPJ_UINT32 f);
static OPJ_INT16 opj_t1_getnmsedec_sig(OPJ_UINT32 x, OPJ_UINT32 bitpos);
static OPJ_INT16 opj_t1_getnmsedec_ref(OPJ_UINT32 x, OPJ_UINT32 bitpos);
static void opj_t1_updateflags(opj_flag_t *flagsp, OPJ_UINT32 s, OPJ_UINT32 stride);
/**
Encode significant pass
*/
static void opj_t1_enc_sigpass_step(opj_t1_t *t1,
                                    opj_flag_t *flagsp,
                                    OPJ_INT32 *datap,
                                    OPJ_UINT32 orient,
                                    OPJ_INT32 bpno,
                                    OPJ_INT32 one,
                                    OPJ_INT32 *nmsedec,
                                    OPJ_BYTE type,
                                    OPJ_UINT32 vsc);

/**
Decode significant pass
*/
#if 0
static void opj_t1_dec_sigpass_step(opj_t1_t *t1,
                                    opj_flag_t *flagsp,
                                    OPJ_INT32 *datap,
                                    OPJ_UINT32 orient,
                                    OPJ_INT32 oneplushalf,
                                    OPJ_BYTE type,
                                    OPJ_UINT32 vsc);
#endif

static INLINE void opj_t1_dec_sigpass_step_raw(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 orient,
                OPJ_INT32 oneplushalf,
                OPJ_INT32 vsc);
static INLINE void opj_t1_dec_sigpass_step_mqc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 orient,
                OPJ_INT32 oneplushalf);
static INLINE void opj_t1_dec_sigpass_step_mqc_vsc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 orient,
                OPJ_INT32 oneplushalf,
                OPJ_INT32 vsc);


/**
Encode significant pass
*/
static void opj_t1_enc_sigpass( opj_t1_t *t1,
                                OPJ_INT32 bpno,
                                OPJ_UINT32 orient,
                                OPJ_INT32 *nmsedec,
                                OPJ_BYTE type,
                                OPJ_UINT32 cblksty);

/**
Decode significant pass
*/
static void opj_t1_dec_sigpass_raw(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 orient,
                OPJ_INT32 cblksty);
static void opj_t1_dec_sigpass_mqc(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 orient);
static void opj_t1_dec_sigpass_mqc_vsc(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 orient);


/**
Encode refinement pass
*/
static void opj_t1_enc_refpass_step(opj_t1_t *t1,
                                    opj_flag_t *flagsp,
                                    OPJ_INT32 *datap,
                                    OPJ_INT32 bpno,
                                    OPJ_INT32 one,
                                    OPJ_INT32 *nmsedec,
                                    OPJ_BYTE type,
                                    OPJ_UINT32 vsc);


/**
Encode refinement pass
*/
static void opj_t1_enc_refpass( opj_t1_t *t1,
                                OPJ_INT32 bpno,
                                OPJ_INT32 *nmsedec,
                                OPJ_BYTE type,
                                OPJ_UINT32 cblksty);

/**
Decode refinement pass
*/
static void opj_t1_dec_refpass_raw(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 cblksty);
static void opj_t1_dec_refpass_mqc(
                opj_t1_t *t1,
                OPJ_INT32 bpno);
static void opj_t1_dec_refpass_mqc_vsc(
                opj_t1_t *t1,
                OPJ_INT32 bpno);


/**
Decode refinement pass
*/
#if 0
static void opj_t1_dec_refpass_step(opj_t1_t *t1,
                                    opj_flag_t *flagsp,
                                    OPJ_INT32 *datap,
                                    OPJ_INT32 poshalf,
                                    OPJ_INT32 neghalf,
                                    OPJ_BYTE type,
                                    OPJ_UINT32 vsc);
#endif

static INLINE void  opj_t1_dec_refpass_step_raw(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 poshalf,
                OPJ_INT32 neghalf,
                OPJ_INT32 vsc);
static INLINE void opj_t1_dec_refpass_step_mqc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 poshalf,
                OPJ_INT32 neghalf);
static INLINE void opj_t1_dec_refpass_step_mqc_vsc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 poshalf,
                OPJ_INT32 neghalf,
                OPJ_INT32 vsc);


/**
Encode clean-up pass
*/
static void opj_t1_enc_clnpass_step(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_UINT32 orient,
		OPJ_INT32 bpno,
		OPJ_INT32 one,
		OPJ_INT32 *nmsedec,
		OPJ_UINT32 partial,
		OPJ_UINT32 vsc);
/**
Decode clean-up pass
*/
static void opj_t1_dec_clnpass_step_partial(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_INT32 orient,
		OPJ_INT32 oneplushalf);
static void opj_t1_dec_clnpass_step(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_INT32 orient,
		OPJ_INT32 oneplushalf);
static void opj_t1_dec_clnpass_step_vsc(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_INT32 orient,
		OPJ_INT32 oneplushalf,
		OPJ_INT32 partial,
		OPJ_INT32 vsc);
/**
Encode clean-up pass
*/
static void opj_t1_enc_clnpass(
		opj_t1_t *t1,
		OPJ_INT32 bpno,
		OPJ_UINT32 orient,
		OPJ_INT32 *nmsedec,
		OPJ_UINT32 cblksty);
/**
Decode clean-up pass
*/
static void opj_t1_dec_clnpass(
		opj_t1_t *t1,
		OPJ_INT32 bpno,
		OPJ_INT32 orient,
		OPJ_INT32 cblksty);

static OPJ_FLOAT64 opj_t1_getwmsedec(
		OPJ_INT32 nmsedec,
		OPJ_UINT32 compno,
		OPJ_UINT32 level,
		OPJ_UINT32 orient,
		OPJ_INT32 bpno,
		OPJ_UINT32 qmfbid,
		OPJ_FLOAT64 stepsize,
		OPJ_UINT32 numcomps,
		const OPJ_FLOAT64 * mct_norms,
		OPJ_UINT32 mct_numcomps);

static void opj_t1_encode_cblk( opj_t1_t *t1,
                                opj_tcd_cblk_enc_t* cblk,
                                OPJ_UINT32 orient,
                                OPJ_UINT32 compno,
                                OPJ_UINT32 level,
                                OPJ_UINT32 qmfbid,
                                OPJ_FLOAT64 stepsize,
                                OPJ_UINT32 cblksty,
                                OPJ_UINT32 numcomps,
                                opj_tcd_tile_t * tile,
                                const OPJ_FLOAT64 * mct_norms,
                                OPJ_UINT32 mct_numcomps);

/**
Decode 1 code-block
@param t1 T1 handle
@param cblk Code-block coding parameters
@param orient
@param roishift Region of interest shifting value
@param cblksty Code-block style
*/
static OPJ_BOOL opj_t1_decode_cblk( opj_t1_t *t1,
                                    opj_tcd_cblk_dec_t* cblk,
                                    OPJ_UINT32 orient,
                                    OPJ_UINT32 roishift,
                                    OPJ_UINT32 cblksty);

static OPJ_BOOL opj_t1_allocate_buffers(   opj_t1_t *t1,
                                    OPJ_UINT32 w,
                                    OPJ_UINT32 h);

/*@}*/

/*@}*/

/* ----------------------------------------------------------------------- */

static OPJ_BYTE opj_t1_getctxno_zc(OPJ_UINT32 f, OPJ_UINT32 orient) {
	return lut_ctxno_zc[(orient << 8) | (f & T1_SIG_OTH)];
}

static OPJ_BYTE opj_t1_getctxno_sc(OPJ_UINT32 f) {
	return lut_ctxno_sc[(f & (T1_SIG_PRIM | T1_SGN)) >> 4];
}

static OPJ_UINT32 opj_t1_getctxno_mag(OPJ_UINT32 f) {
	OPJ_UINT32 tmp1 = (f & T1_SIG_OTH) ? T1_CTXNO_MAG + 1 : T1_CTXNO_MAG;
	OPJ_UINT32 tmp2 = (f & T1_REFINE) ? T1_CTXNO_MAG + 2 : tmp1;
	return (tmp2);
}

static OPJ_BYTE opj_t1_getspb(OPJ_UINT32 f) {
	return lut_spb[(f & (T1_SIG_PRIM | T1_SGN)) >> 4];
}

static OPJ_INT16 opj_t1_getnmsedec_sig(OPJ_UINT32 x, OPJ_UINT32 bitpos) {
	if (bitpos > 0) {
		return lut_nmsedec_sig[(x >> (bitpos)) & ((1 << T1_NMSEDEC_BITS) - 1)];
	}
	
	return lut_nmsedec_sig0[x & ((1 << T1_NMSEDEC_BITS) - 1)];
}

static OPJ_INT16 opj_t1_getnmsedec_ref(OPJ_UINT32 x, OPJ_UINT32 bitpos) {
	if (bitpos > 0) {
		return lut_nmsedec_ref[(x >> (bitpos)) & ((1 << T1_NMSEDEC_BITS) - 1)];
	}

    return lut_nmsedec_ref0[x & ((1 << T1_NMSEDEC_BITS) - 1)];
}

static void opj_t1_updateflags(opj_flag_t *flagsp, OPJ_UINT32 s, OPJ_UINT32 stride) {
	opj_flag_t *np = flagsp - stride;
	opj_flag_t *sp = flagsp + stride;

	static const opj_flag_t mod[] = {
		T1_SIG_S, T1_SIG_S|T1_SGN_S,
		T1_SIG_E, T1_SIG_E|T1_SGN_E,
		T1_SIG_W, T1_SIG_W|T1_SGN_W,
		T1_SIG_N, T1_SIG_N|T1_SGN_N
	};

	np[-1] |= T1_SIG_SE;
	np[0]  |= mod[s];
	np[1]  |= T1_SIG_SW;

	flagsp[-1] |= mod[s+2];
	flagsp[0]  |= T1_SIG;
	flagsp[1]  |= mod[s+4];

	sp[-1] |= T1_SIG_NE;
	sp[0]  |= mod[s+6];
	sp[1]  |= T1_SIG_NW;
}

static void opj_t1_enc_sigpass_step(   opj_t1_t *t1,
                                opj_flag_t *flagsp,
                                OPJ_INT32 *datap,
                                OPJ_UINT32 orient,
                                OPJ_INT32 bpno,
                                OPJ_INT32 one,
                                OPJ_INT32 *nmsedec,
                                OPJ_BYTE type,
                                OPJ_UINT32 vsc
                                )
{
	OPJ_INT32 v;
    OPJ_UINT32 flag;
	
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	flag = vsc ? (OPJ_UINT32)((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (OPJ_UINT32)(*flagsp);
	if ((flag & T1_SIG_OTH) && !(flag & (T1_SIG | T1_VISIT))) {
		v = opj_int_abs(*datap) & one ? 1 : 0;
		opj_mqc_setcurctx(mqc, opj_t1_getctxno_zc(flag, orient));	/* ESSAI */
		if (type == T1_TYPE_RAW) {	/* BYPASS/LAZY MODE */
			opj_mqc_bypass_enc(mqc, (OPJ_UINT32)v);
		} else {
			opj_mqc_encode(mqc, (OPJ_UINT32)v);
		}
		if (v) {
			v = *datap < 0 ? 1 : 0;
			*nmsedec +=	opj_t1_getnmsedec_sig((OPJ_UINT32)opj_int_abs(*datap), (OPJ_UINT32)(bpno));
			opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc(flag));	/* ESSAI */
			if (type == T1_TYPE_RAW) {	/* BYPASS/LAZY MODE */
				opj_mqc_bypass_enc(mqc, (OPJ_UINT32)v);
			} else {
				opj_mqc_encode(mqc, (OPJ_UINT32)(v ^ opj_t1_getspb((OPJ_UINT32)flag)));
			}
			opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
		}
		*flagsp |= T1_VISIT;
	}
}


static INLINE void opj_t1_dec_sigpass_step_raw(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 orient,
                OPJ_INT32 oneplushalf,
                OPJ_INT32 vsc)
{
        OPJ_INT32 v, flag;
        opj_raw_t *raw = t1->raw;       /* RAW component */
        OPJ_ARG_NOT_USED(orient);
       
        flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
        if ((flag & T1_SIG_OTH) && !(flag & (T1_SIG | T1_VISIT))) {
                        if (opj_raw_decode(raw)) {
                                v = (OPJ_INT32)opj_raw_decode(raw);    /* ESSAI */
                                *datap = v ? -oneplushalf : oneplushalf;
                                opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
                        }
                *flagsp |= T1_VISIT;
        }
}      

static INLINE void opj_t1_dec_sigpass_step_mqc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 orient,
                OPJ_INT32 oneplushalf)
{
        OPJ_INT32 v, flag;
       
        opj_mqc_t *mqc = t1->mqc;       /* MQC component */
       
        flag = *flagsp;
        if ((flag & T1_SIG_OTH) && !(flag & (T1_SIG | T1_VISIT))) {
                        opj_mqc_setcurctx(mqc, opj_t1_getctxno_zc((OPJ_UINT32)flag, (OPJ_UINT32)orient));
                        if (opj_mqc_decode(mqc)) {
                                opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc((OPJ_UINT32)flag));
                                v = opj_mqc_decode(mqc) ^ opj_t1_getspb((OPJ_UINT32)flag);
                                *datap = v ? -oneplushalf : oneplushalf;
                                opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
                        }
                *flagsp |= T1_VISIT;
        }
}                               /* VSC and  BYPASS by Antonin */

static INLINE void opj_t1_dec_sigpass_step_mqc_vsc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 orient,
                OPJ_INT32 oneplushalf,
                OPJ_INT32 vsc)
{
        OPJ_INT32 v, flag;
       
        opj_mqc_t *mqc = t1->mqc;       /* MQC component */
       
        flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
        if ((flag & T1_SIG_OTH) && !(flag & (T1_SIG | T1_VISIT))) {
                opj_mqc_setcurctx(mqc, opj_t1_getctxno_zc((OPJ_UINT32)flag, (OPJ_UINT32)orient));
                if (opj_mqc_decode(mqc)) {
                        opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc((OPJ_UINT32)flag));
                        v = opj_mqc_decode(mqc) ^ opj_t1_getspb((OPJ_UINT32)flag);
                        *datap = v ? -oneplushalf : oneplushalf;
                        opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
                }
                *flagsp |= T1_VISIT;
        }
}                               /* VSC and  BYPASS by Antonin */


static void opj_t1_enc_sigpass(opj_t1_t *t1,
                        OPJ_INT32 bpno,
                        OPJ_UINT32 orient,
                        OPJ_INT32 *nmsedec,
                        OPJ_BYTE type,
                        OPJ_UINT32 cblksty
                        )
{
	OPJ_UINT32 i, j, k, vsc; 
    OPJ_INT32 one;

	*nmsedec = 0;
	one = 1 << (bpno + T1_NMSEDEC_FRACBITS);
	for (k = 0; k < t1->h; k += 4) {
		for (i = 0; i < t1->w; ++i) {
			for (j = k; j < k + 4 && j < t1->h; ++j) {
				vsc = ((cblksty & J2K_CCP_CBLKSTY_VSC) && (j == k + 3 || j == t1->h - 1)) ? 1 : 0;
				opj_t1_enc_sigpass_step(
						t1,
						&t1->flags[((j+1) * t1->flags_stride) + i + 1],
						&t1->data[(j * t1->data_stride) + i],
						orient,
						bpno,
						one,
						nmsedec,
						type,
						vsc);
			}
		}
	}
}

static void opj_t1_dec_sigpass_raw(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 orient,
                OPJ_INT32 cblksty)
{
        OPJ_INT32 one, half, oneplushalf, vsc;
        OPJ_UINT32 i, j, k; 
        one = 1 << bpno;
        half = one >> 1;
        oneplushalf = one | half;
        for (k = 0; k < t1->h; k += 4) {
                for (i = 0; i < t1->w; ++i) {
                        for (j = k; j < k + 4 && j < t1->h; ++j) {
                                vsc = ((cblksty & J2K_CCP_CBLKSTY_VSC) && (j == k + 3 || j == t1->h - 1)) ? 1 : 0;
                                opj_t1_dec_sigpass_step_raw(
                                                t1,
                                                &t1->flags[((j+1) * t1->flags_stride) + i + 1],
                                                &t1->data[(j * t1->w) + i],
                                                orient,
                                                oneplushalf,
                                                vsc);
                        }
                }
        }
}                               /* VSC and  BYPASS by Antonin */

static void opj_t1_dec_sigpass_mqc(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 orient)
{
        OPJ_INT32 one, half, oneplushalf;
        OPJ_UINT32 i, j, k;
        OPJ_INT32 *data1 = t1->data;
        opj_flag_t *flags1 = &t1->flags[1];
        one = 1 << bpno;
        half = one >> 1;
        oneplushalf = one | half;
        for (k = 0; k < (t1->h & ~3u); k += 4) {
                for (i = 0; i < t1->w; ++i) {
                        OPJ_INT32 *data2 = data1 + i;
                        opj_flag_t *flags2 = flags1 + i;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_sigpass_step_mqc(t1, flags2, data2, orient, oneplushalf);
                        data2 += t1->w;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_sigpass_step_mqc(t1, flags2, data2, orient, oneplushalf);
                        data2 += t1->w;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_sigpass_step_mqc(t1, flags2, data2, orient, oneplushalf);
                        data2 += t1->w;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_sigpass_step_mqc(t1, flags2, data2, orient, oneplushalf);
                        data2 += t1->w;
                }
                data1 += t1->w << 2;
                flags1 += t1->flags_stride << 2;
        }
        for (i = 0; i < t1->w; ++i) {
                OPJ_INT32 *data2 = data1 + i;
                opj_flag_t *flags2 = flags1 + i;
                for (j = k; j < t1->h; ++j) {
                        flags2 += t1->flags_stride;
                        opj_t1_dec_sigpass_step_mqc(t1, flags2, data2, orient, oneplushalf);
                        data2 += t1->w;
                }
        }
}                               /* VSC and  BYPASS by Antonin */

static void opj_t1_dec_sigpass_mqc_vsc(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 orient)
{
        OPJ_INT32 one, half, oneplushalf, vsc;
        OPJ_UINT32 i, j, k;
        one = 1 << bpno;
        half = one >> 1;
        oneplushalf = one | half;
        for (k = 0; k < t1->h; k += 4) {
                for (i = 0; i < t1->w; ++i) {
                        for (j = k; j < k + 4 && j < t1->h; ++j) {
                                vsc = (j == k + 3 || j == t1->h - 1) ? 1 : 0;
                                opj_t1_dec_sigpass_step_mqc_vsc(
                                                t1,
                                                &t1->flags[((j+1) * t1->flags_stride) + i + 1],
                                                &t1->data[(j * t1->w) + i],
                                                orient,
                                                oneplushalf,
                                                vsc);
                        }
                }
        }
}                               /* VSC and  BYPASS by Antonin */


static void opj_t1_enc_refpass_step(   opj_t1_t *t1,
                                opj_flag_t *flagsp,
                                OPJ_INT32 *datap,
                                OPJ_INT32 bpno,
                                OPJ_INT32 one,
                                OPJ_INT32 *nmsedec,
                                OPJ_BYTE type,
                                OPJ_UINT32 vsc)
{
	OPJ_INT32 v;
	OPJ_UINT32 flag;
	
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	flag = vsc ? (OPJ_UINT32)((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (OPJ_UINT32)(*flagsp);
	if ((flag & (T1_SIG | T1_VISIT)) == T1_SIG) {
		*nmsedec += opj_t1_getnmsedec_ref((OPJ_UINT32)opj_int_abs(*datap), (OPJ_UINT32)(bpno));
		v = opj_int_abs(*datap) & one ? 1 : 0;
		opj_mqc_setcurctx(mqc, opj_t1_getctxno_mag(flag));	/* ESSAI */
		if (type == T1_TYPE_RAW) {	/* BYPASS/LAZY MODE */
			opj_mqc_bypass_enc(mqc, (OPJ_UINT32)v);
		} else {
			opj_mqc_encode(mqc, (OPJ_UINT32)v);
		}
		*flagsp |= T1_REFINE;
	}
}

static INLINE void opj_t1_dec_refpass_step_raw(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 poshalf,
                OPJ_INT32 neghalf,
                OPJ_INT32 vsc)
{
        OPJ_INT32 v, t, flag;
       
        opj_raw_t *raw = t1->raw;       /* RAW component */
       
        flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
        if ((flag & (T1_SIG | T1_VISIT)) == T1_SIG) {
                        v = (OPJ_INT32)opj_raw_decode(raw);
                t = v ? poshalf : neghalf;
                *datap += *datap < 0 ? -t : t;
                *flagsp |= T1_REFINE;
        }
}                               /* VSC and  BYPASS by Antonin  */

static INLINE void opj_t1_dec_refpass_step_mqc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 poshalf,
                OPJ_INT32 neghalf)
{
        OPJ_INT32 v, t, flag;
       
        opj_mqc_t *mqc = t1->mqc;       /* MQC component */
       
        flag = *flagsp;
        if ((flag & (T1_SIG | T1_VISIT)) == T1_SIG) {
                opj_mqc_setcurctx(mqc, opj_t1_getctxno_mag((OPJ_UINT32)flag));      /* ESSAI */
                        v = opj_mqc_decode(mqc);
                t = v ? poshalf : neghalf;
                *datap += *datap < 0 ? -t : t;
                *flagsp |= T1_REFINE;
                }
}                               /* VSC and  BYPASS by Antonin  */

static INLINE void opj_t1_dec_refpass_step_mqc_vsc(
                opj_t1_t *t1,
                opj_flag_t *flagsp,
                OPJ_INT32 *datap,
                OPJ_INT32 poshalf,
                OPJ_INT32 neghalf,
                OPJ_INT32 vsc)
{
        OPJ_INT32 v, t, flag;
       
        opj_mqc_t *mqc = t1->mqc;       /* MQC component */
       
        flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
        if ((flag & (T1_SIG | T1_VISIT)) == T1_SIG) {
                opj_mqc_setcurctx(mqc, opj_t1_getctxno_mag((OPJ_UINT32)flag));      /* ESSAI */
                v = opj_mqc_decode(mqc);
                t = v ? poshalf : neghalf;
                *datap += *datap < 0 ? -t : t;
                *flagsp |= T1_REFINE;
        }
}                               /* VSC and  BYPASS by Antonin  */


static void opj_t1_enc_refpass(
		opj_t1_t *t1,
		OPJ_INT32 bpno,
		OPJ_INT32 *nmsedec,
		OPJ_BYTE type,
		OPJ_UINT32 cblksty)
{
	OPJ_UINT32 i, j, k, vsc;
    OPJ_INT32 one;

	*nmsedec = 0;
	one = 1 << (bpno + T1_NMSEDEC_FRACBITS);
	for (k = 0; k < t1->h; k += 4) {
		for (i = 0; i < t1->w; ++i) {
			for (j = k; j < k + 4 && j < t1->h; ++j) {
				vsc = ((cblksty & J2K_CCP_CBLKSTY_VSC) && (j == k + 3 || j == t1->h - 1)) ? 1 : 0;
				opj_t1_enc_refpass_step(
						t1,
						&t1->flags[((j+1) * t1->flags_stride) + i + 1],
						&t1->data[(j * t1->data_stride) + i],
						bpno,
						one,
						nmsedec,
						type,
						vsc);
			}
		}
	}
}

static void opj_t1_dec_refpass_raw(
                opj_t1_t *t1,
                OPJ_INT32 bpno,
                OPJ_INT32 cblksty)
{
        OPJ_INT32 one, poshalf, neghalf;
        OPJ_UINT32 i, j, k;
        OPJ_INT32 vsc;
        one = 1 << bpno;
        poshalf = one >> 1;
        neghalf = bpno > 0 ? -poshalf : -1;
        for (k = 0; k < t1->h; k += 4) {
                for (i = 0; i < t1->w; ++i) {
                        for (j = k; j < k + 4 && j < t1->h; ++j) {
                                vsc = ((cblksty & J2K_CCP_CBLKSTY_VSC) && (j == k + 3 || j == t1->h - 1)) ? 1 : 0;
                                opj_t1_dec_refpass_step_raw(
                                                t1,
                                                &t1->flags[((j+1) * t1->flags_stride) + i + 1],
                                                &t1->data[(j * t1->w) + i],
                                                poshalf,
                                                neghalf,
                                                vsc);
                        }
                }
        }
}                               /* VSC and  BYPASS by Antonin */

static void opj_t1_dec_refpass_mqc(
                opj_t1_t *t1,
                OPJ_INT32 bpno)
{
        OPJ_INT32 one, poshalf, neghalf;
        OPJ_UINT32 i, j, k;
        OPJ_INT32 *data1 = t1->data;
        opj_flag_t *flags1 = &t1->flags[1];
        one = 1 << bpno;
        poshalf = one >> 1;
        neghalf = bpno > 0 ? -poshalf : -1;
        for (k = 0; k < (t1->h & ~3u); k += 4) {
                for (i = 0; i < t1->w; ++i) {
                        OPJ_INT32 *data2 = data1 + i;
                        opj_flag_t *flags2 = flags1 + i;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_refpass_step_mqc(t1, flags2, data2, poshalf, neghalf);
                        data2 += t1->w;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_refpass_step_mqc(t1, flags2, data2, poshalf, neghalf);
                        data2 += t1->w;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_refpass_step_mqc(t1, flags2, data2, poshalf, neghalf);
                        data2 += t1->w;
                        flags2 += t1->flags_stride;
                        opj_t1_dec_refpass_step_mqc(t1, flags2, data2, poshalf, neghalf);
                        data2 += t1->w;
                }
                data1 += t1->w << 2;
                flags1 += t1->flags_stride << 2;
        }
        for (i = 0; i < t1->w; ++i) {
                OPJ_INT32 *data2 = data1 + i;
                opj_flag_t *flags2 = flags1 + i;
                for (j = k; j < t1->h; ++j) {
                        flags2 += t1->flags_stride;
                        opj_t1_dec_refpass_step_mqc(t1, flags2, data2, poshalf, neghalf);
                        data2 += t1->w;
                }
        }
}                               /* VSC and  BYPASS by Antonin */

static void opj_t1_dec_refpass_mqc_vsc(
                opj_t1_t *t1,
                OPJ_INT32 bpno)
{
        OPJ_INT32 one, poshalf, neghalf;
        OPJ_UINT32 i, j, k;
        OPJ_INT32 vsc;
        one = 1 << bpno;
        poshalf = one >> 1;
        neghalf = bpno > 0 ? -poshalf : -1;
        for (k = 0; k < t1->h; k += 4) {
                for (i = 0; i < t1->w; ++i) {
                        for (j = k; j < k + 4 && j < t1->h; ++j) {
                                vsc = ((j == k + 3 || j == t1->h - 1)) ? 1 : 0;
                                opj_t1_dec_refpass_step_mqc_vsc(
                                                t1,
                                                &t1->flags[((j+1) * t1->flags_stride) + i + 1],
                                                &t1->data[(j * t1->w) + i],
                                                poshalf,
                                                neghalf,
                                                vsc);
                        }
                }
        }
}                               /* VSC and  BYPASS by Antonin */


static void opj_t1_enc_clnpass_step(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_UINT32 orient,
		OPJ_INT32 bpno,
		OPJ_INT32 one,
		OPJ_INT32 *nmsedec,
		OPJ_UINT32 partial,
		OPJ_UINT32 vsc)
{
	OPJ_INT32 v;
	OPJ_UINT32 flag;
	
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	flag = vsc ? (OPJ_UINT32)((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (OPJ_UINT32)(*flagsp);
	if (partial) {
		goto LABEL_PARTIAL;
	}
	if (!(*flagsp & (T1_SIG | T1_VISIT))) {
		opj_mqc_setcurctx(mqc, opj_t1_getctxno_zc(flag, orient));
		v = opj_int_abs(*datap) & one ? 1 : 0;
		opj_mqc_encode(mqc, (OPJ_UINT32)v);
		if (v) {
LABEL_PARTIAL:
			*nmsedec += opj_t1_getnmsedec_sig((OPJ_UINT32)opj_int_abs(*datap), (OPJ_UINT32)(bpno));
			opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc(flag));
			v = *datap < 0 ? 1 : 0;
			opj_mqc_encode(mqc, (OPJ_UINT32)(v ^ opj_t1_getspb((OPJ_UINT32)flag)));
			opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
		}
	}
	*flagsp &= ~T1_VISIT;
}

static void opj_t1_dec_clnpass_step_partial(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_INT32 orient,
		OPJ_INT32 oneplushalf)
{
	OPJ_INT32 v, flag;
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	OPJ_ARG_NOT_USED(orient);
	
	flag = *flagsp;
	opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc((OPJ_UINT32)flag));
	v = opj_mqc_decode(mqc) ^ opj_t1_getspb((OPJ_UINT32)flag);
	*datap = v ? -oneplushalf : oneplushalf;
	opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
	*flagsp &= ~T1_VISIT;
}				/* VSC and  BYPASS by Antonin */

static void opj_t1_dec_clnpass_step(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_INT32 orient,
		OPJ_INT32 oneplushalf)
{
	OPJ_INT32 v, flag;
	
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	flag = *flagsp;
	if (!(flag & (T1_SIG | T1_VISIT))) {
		opj_mqc_setcurctx(mqc, opj_t1_getctxno_zc((OPJ_UINT32)flag, (OPJ_UINT32)orient));
		if (opj_mqc_decode(mqc)) {
			opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc((OPJ_UINT32)flag));
			v = opj_mqc_decode(mqc) ^ opj_t1_getspb((OPJ_UINT32)flag);
			*datap = v ? -oneplushalf : oneplushalf;
			opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
		}
	}
	*flagsp &= ~T1_VISIT;
}				/* VSC and  BYPASS by Antonin */

static void opj_t1_dec_clnpass_step_vsc(
		opj_t1_t *t1,
		opj_flag_t *flagsp,
		OPJ_INT32 *datap,
		OPJ_INT32 orient,
		OPJ_INT32 oneplushalf,
		OPJ_INT32 partial,
		OPJ_INT32 vsc)
{
	OPJ_INT32 v, flag;
	
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
	if (partial) {
		goto LABEL_PARTIAL;
	}
	if (!(flag & (T1_SIG | T1_VISIT))) {
		opj_mqc_setcurctx(mqc, opj_t1_getctxno_zc((OPJ_UINT32)flag, (OPJ_UINT32)orient));
		if (opj_mqc_decode(mqc)) {
LABEL_PARTIAL:
			opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc((OPJ_UINT32)flag));
			v = opj_mqc_decode(mqc) ^ opj_t1_getspb((OPJ_UINT32)flag);
			*datap = v ? -oneplushalf : oneplushalf;
			opj_t1_updateflags(flagsp, (OPJ_UINT32)v, t1->flags_stride);
		}
	}
	*flagsp &= ~T1_VISIT;
}

static void opj_t1_enc_clnpass(
		opj_t1_t *t1,
		OPJ_INT32 bpno,
		OPJ_UINT32 orient,
		OPJ_INT32 *nmsedec,
		OPJ_UINT32 cblksty)
{
	OPJ_UINT32 i, j, k;
	OPJ_INT32 one;
	OPJ_UINT32 agg, runlen, vsc;
	
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	*nmsedec = 0;
	one = 1 << (bpno + T1_NMSEDEC_FRACBITS);
	for (k = 0; k < t1->h; k += 4) {
		for (i = 0; i < t1->w; ++i) {
			if (k + 3 < t1->h) {
				if (cblksty & J2K_CCP_CBLKSTY_VSC) {
					agg = !(MACRO_t1_flags(1 + k,1 + i) & (T1_SIG | T1_VISIT | T1_SIG_OTH)
						|| MACRO_t1_flags(1 + k + 1,1 + i) & (T1_SIG | T1_VISIT | T1_SIG_OTH)
						|| MACRO_t1_flags(1 + k + 2,1 + i) & (T1_SIG | T1_VISIT | T1_SIG_OTH)
						|| (MACRO_t1_flags(1 + k + 3,1 + i) 
						& (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW |	T1_SGN_S))) & (T1_SIG | T1_VISIT | T1_SIG_OTH));
				} else {
					agg = !((MACRO_t1_flags(1 + k,1 + i) | 
						    MACRO_t1_flags(1 + k + 1,1 + i) |
						    MACRO_t1_flags(1 + k + 2,1 + i) | 
						     MACRO_t1_flags(1 + k + 3,1 + i)) & (T1_SIG | T1_VISIT | T1_SIG_OTH));
				}
			} else {
				agg = 0;
			}
			if (agg) {
				for (runlen = 0; runlen < 4; ++runlen) {
					if (opj_int_abs(t1->data[((k + runlen)*t1->data_stride) + i]) & one)
						break;
				}
				opj_mqc_setcurctx(mqc, T1_CTXNO_AGG);
				opj_mqc_encode(mqc, runlen != 4);
				if (runlen == 4) {
					continue;
				}
				opj_mqc_setcurctx(mqc, T1_CTXNO_UNI);
				opj_mqc_encode(mqc, runlen >> 1);
				opj_mqc_encode(mqc, runlen & 1);
			} else {
				runlen = 0;
			}
			for (j = k + runlen; j < k + 4 && j < t1->h; ++j) {
				vsc = ((cblksty & J2K_CCP_CBLKSTY_VSC) && (j == k + 3 || j == t1->h - 1)) ? 1 : 0;
				opj_t1_enc_clnpass_step(
						t1,
						&t1->flags[((j+1) * t1->flags_stride) + i + 1],
						&t1->data[(j * t1->data_stride) + i],
						orient,
						bpno,
						one,
						nmsedec,
						agg && (j == k + runlen),
						vsc);
			}
		}
	}
}

static void opj_t1_dec_clnpass(
		opj_t1_t *t1,
		OPJ_INT32 bpno,
		OPJ_INT32 orient,
		OPJ_INT32 cblksty)
{
	OPJ_INT32 one, half, oneplushalf, agg, runlen, vsc;
    OPJ_UINT32 i, j, k;
	OPJ_INT32 segsym = cblksty & J2K_CCP_CBLKSTY_SEGSYM;
	
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	
	one = 1 << bpno;
	half = one >> 1;
	oneplushalf = one | half;
	if (cblksty & J2K_CCP_CBLKSTY_VSC) {
	for (k = 0; k < t1->h; k += 4) {
		for (i = 0; i < t1->w; ++i) {
			if (k + 3 < t1->h) {
					agg = !(MACRO_t1_flags(1 + k,1 + i) & (T1_SIG | T1_VISIT | T1_SIG_OTH)
						|| MACRO_t1_flags(1 + k + 1,1 + i) & (T1_SIG | T1_VISIT | T1_SIG_OTH)
						|| MACRO_t1_flags(1 + k + 2,1 + i) & (T1_SIG | T1_VISIT | T1_SIG_OTH)
						|| (MACRO_t1_flags(1 + k + 3,1 + i) 
						& (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW |	T1_SGN_S))) & (T1_SIG | T1_VISIT | T1_SIG_OTH));
				} else {
				agg = 0;
			}
			if (agg) {
				opj_mqc_setcurctx(mqc, T1_CTXNO_AGG);
				if (!opj_mqc_decode(mqc)) {
					continue;
				}
				opj_mqc_setcurctx(mqc, T1_CTXNO_UNI);
				runlen = opj_mqc_decode(mqc);
				runlen = (runlen << 1) | opj_mqc_decode(mqc);
			} else {
				runlen = 0;
			}
			for (j = k + (OPJ_UINT32)runlen; j < k + 4 && j < t1->h; ++j) {
					vsc = (j == k + 3 || j == t1->h - 1) ? 1 : 0;
					opj_t1_dec_clnpass_step_vsc(
						t1,
						&t1->flags[((j+1) * t1->flags_stride) + i + 1],
						&t1->data[(j * t1->w) + i],
						orient,
						oneplushalf,
						agg && (j == k + (OPJ_UINT32)runlen),
						vsc);
			}
		}
	}
	} else {
		OPJ_INT32 *data1 = t1->data;
		opj_flag_t *flags1 = &t1->flags[1];
		for (k = 0; k < (t1->h & ~3u); k += 4) {
			for (i = 0; i < t1->w; ++i) {
				OPJ_INT32 *data2 = data1 + i;
				opj_flag_t *flags2 = flags1 + i;
				agg = !((MACRO_t1_flags(1 + k, 1 + i) |
							MACRO_t1_flags(1 + k + 1, 1 + i) |
							MACRO_t1_flags(1 + k + 2, 1 + i) |
							MACRO_t1_flags(1 + k + 3, 1 + i)) & (T1_SIG | T1_VISIT | T1_SIG_OTH));
				if (agg) {
					opj_mqc_setcurctx(mqc, T1_CTXNO_AGG);
					if (!opj_mqc_decode(mqc)) {
						continue;
					}
					opj_mqc_setcurctx(mqc, T1_CTXNO_UNI);
					runlen = opj_mqc_decode(mqc);
					runlen = (runlen << 1) | opj_mqc_decode(mqc);
					flags2 += (OPJ_UINT32)runlen * t1->flags_stride;
					data2 += (OPJ_UINT32)runlen * t1->w;
					for (j = (OPJ_UINT32)runlen; j < 4 && j < t1->h; ++j) {
						flags2 += t1->flags_stride;
						if (agg && (j == (OPJ_UINT32)runlen)) {
							opj_t1_dec_clnpass_step_partial(t1, flags2, data2, orient, oneplushalf);
						} else {
							opj_t1_dec_clnpass_step(t1, flags2, data2, orient, oneplushalf);
						}
						data2 += t1->w;
					}
				} else {
					flags2 += t1->flags_stride;
					opj_t1_dec_clnpass_step(t1, flags2, data2, orient, oneplushalf);
					data2 += t1->w;
					flags2 += t1->flags_stride;
					opj_t1_dec_clnpass_step(t1, flags2, data2, orient, oneplushalf);
					data2 += t1->w;
					flags2 += t1->flags_stride;
					opj_t1_dec_clnpass_step(t1, flags2, data2, orient, oneplushalf);
					data2 += t1->w;
					flags2 += t1->flags_stride;
					opj_t1_dec_clnpass_step(t1, flags2, data2, orient, oneplushalf);
					data2 += t1->w;
				}
			}
			data1 += t1->w << 2;
			flags1 += t1->flags_stride << 2;
		}
		for (i = 0; i < t1->w; ++i) {
			OPJ_INT32 *data2 = data1 + i;
			opj_flag_t *flags2 = flags1 + i;
			for (j = k; j < t1->h; ++j) {
				flags2 += t1->flags_stride;
				opj_t1_dec_clnpass_step(t1, flags2, data2, orient, oneplushalf);
				data2 += t1->w;
			}
		}
	}

	if (segsym) {
		OPJ_INT32 v = 0;
		opj_mqc_setcurctx(mqc, T1_CTXNO_UNI);
		v = opj_mqc_decode(mqc);
		v = (v << 1) | opj_mqc_decode(mqc);
		v = (v << 1) | opj_mqc_decode(mqc);
		v = (v << 1) | opj_mqc_decode(mqc);
		/*
		if (v!=0xa) {
			opj_event_msg(t1->cinfo, EVT_WARNING, "Bad segmentation symbol %x\n", v);
		} 
		*/
	}
}				/* VSC and  BYPASS by Antonin */


/** mod fixed_quality */
static OPJ_FLOAT64 opj_t1_getwmsedec(
		OPJ_INT32 nmsedec,
		OPJ_UINT32 compno,
		OPJ_UINT32 level,
		OPJ_UINT32 orient,
		OPJ_INT32 bpno,
		OPJ_UINT32 qmfbid,
		OPJ_FLOAT64 stepsize,
		OPJ_UINT32 numcomps,
		const OPJ_FLOAT64 * mct_norms,
		OPJ_UINT32 mct_numcomps)
{
	OPJ_FLOAT64 w1 = 1, w2, wmsedec;
	OPJ_ARG_NOT_USED(numcomps);

	if (mct_norms && (compno < mct_numcomps)) {
		w1 = mct_norms[compno];
	}

	if (qmfbid == 1) {
		w2 = opj_dwt_getnorm(level, orient);
	} else {	/* if (qmfbid == 0) */
		w2 = opj_dwt_getnorm_real(level, orient);
	}

	wmsedec = w1 * w2 * stepsize * (1 << bpno);
	wmsedec *= wmsedec * nmsedec / 8192.0;

	return wmsedec;
}

static OPJ_BOOL opj_t1_allocate_buffers(
		opj_t1_t *t1,
		OPJ_UINT32 w,
		OPJ_UINT32 h)
{
	OPJ_UINT32 datasize=w * h;
	OPJ_UINT32 flagssize;

	/* encoder uses tile buffer, so no need to allocate */
	if (!t1->encoder) {
		if(datasize > t1->datasize){
			opj_aligned_free(t1->data);
			if (((OPJ_UINT32)-1) / (OPJ_UINT32)sizeof(OPJ_INT32) < datasize) {
				return OPJ_FALSE;
			}
			t1->data = (OPJ_INT32*) opj_aligned_malloc(datasize * sizeof(OPJ_INT32));
			if(!t1->data){
				/* FIXME event manager error callback */
				return OPJ_FALSE;
			}
			t1->datasize=datasize;
		}
		memset(t1->data,0,datasize * sizeof(OPJ_INT32));
	}
	t1->flags_stride=w+2;
	flagssize=t1->flags_stride * (h+2);

	if(flagssize > t1->flagssize){
		opj_aligned_free(t1->flags);
		if (((OPJ_UINT32)-1) / (OPJ_UINT32)sizeof(opj_flag_t) < flagssize) {
			return OPJ_FALSE;
		}
		t1->flags = (opj_flag_t*) opj_aligned_malloc(flagssize * sizeof(opj_flag_t));
		if(!t1->flags){
			/* FIXME event manager error callback */
			return OPJ_FALSE;
		}
		t1->flagssize=flagssize;
	}
	memset(t1->flags,0,flagssize * sizeof(opj_flag_t));

	t1->w=w;
	t1->h=h;

	return OPJ_TRUE;
}

/* ----------------------------------------------------------------------- */

/* ----------------------------------------------------------------------- */
/**
 * 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)
{
	opj_t1_t *l_t1 = 00;

	l_t1 = (opj_t1_t*) opj_calloc(1,sizeof(opj_t1_t));
	if (!l_t1) {
		return 00;
	}

	/* create MQC and RAW handles */
	l_t1->mqc = opj_mqc_create();
	if (! l_t1->mqc) {
		opj_t1_destroy(l_t1);
		return 00;
	}

	l_t1->raw = opj_raw_create();
	if (! l_t1->raw) {
		opj_t1_destroy(l_t1);
		return 00;
	}
	l_t1->encoder = isEncoder;

	return l_t1;
}


/**
 * Destroys a previously created T1 handle
 *
 * @param p_t1 Tier 1 handle to destroy
*/
void opj_t1_destroy(opj_t1_t *p_t1)
{
	if (! p_t1) {
		return;
	}

	/* destroy MQC and RAW handles */
	opj_mqc_destroy(p_t1->mqc);
	p_t1->mqc = 00;
	opj_raw_destroy(p_t1->raw);
	p_t1->raw = 00;
	
	/* encoder uses tile buffer, so no need to free */
	if (!p_t1->encoder && p_t1->data) {
		opj_aligned_free(p_t1->data);
		p_t1->data = 00;
	}

	if (p_t1->flags) {
		opj_aligned_free(p_t1->flags);
		p_t1->flags = 00;
	}

	opj_free(p_t1);
}

OPJ_BOOL opj_t1_decode_cblks(   opj_t1_t* t1,
                            opj_tcd_tilecomp_t* tilec,
                            opj_tccp_t* tccp
                            )
{
	OPJ_UINT32 resno, bandno, precno, cblkno;
	OPJ_UINT32 tile_w = (OPJ_UINT32)(tilec->x1 - tilec->x0);

	for (resno = 0; resno < tilec->minimum_num_resolutions; ++resno) {
		opj_tcd_resolution_t* res = &tilec->resolutions[resno];

		for (bandno = 0; bandno < res->numbands; ++bandno) {
			opj_tcd_band_t* restrict band = &res->bands[bandno];

			for (precno = 0; precno < res->pw * res->ph; ++precno) {
				opj_tcd_precinct_t* precinct = &band->precincts[precno];

				for (cblkno = 0; cblkno < precinct->cw * precinct->ch; ++cblkno) {
					opj_tcd_cblk_dec_t* cblk = &precinct->cblks.dec[cblkno];
					OPJ_INT32* restrict datap;
					OPJ_UINT32 cblk_w, cblk_h;
					OPJ_INT32 x, y;
					OPJ_UINT32 i, j;

                    if (OPJ_FALSE == opj_t1_decode_cblk(
                                            t1,
                                            cblk,
                                            band->bandno,
                                            (OPJ_UINT32)tccp->roishift,
                                            tccp->cblksty)) {
                            return OPJ_FALSE;
                    }

					x = cblk->x0 - band->x0;
					y = cblk->y0 - band->y0;
					if (band->bandno & 1) {
						opj_tcd_resolution_t* pres = &tilec->resolutions[resno - 1];
						x += pres->x1 - pres->x0;
					}
					if (band->bandno & 2) {
						opj_tcd_resolution_t* pres = &tilec->resolutions[resno - 1];
						y += pres->y1 - pres->y0;
					}

					datap=t1->data;
					cblk_w = t1->w;
					cblk_h = t1->h;

					if (tccp->roishift) {
						OPJ_INT32 thresh = 1 << tccp->roishift;
						for (j = 0; j < cblk_h; ++j) {
							for (i = 0; i < cblk_w; ++i) {
								OPJ_INT32 val = datap[(j * cblk_w) + i];
								OPJ_INT32 mag = abs(val);
								if (mag >= thresh) {
									mag >>= tccp->roishift;
									datap[(j * cblk_w) + i] = val < 0 ? -mag : mag;
								}
							}
						}
					}
					if (tccp->qmfbid == 1) {
                        OPJ_INT32* restrict tiledp = &tilec->data[(OPJ_UINT32)y * tile_w + (OPJ_UINT32)x];
						for (j = 0; j < cblk_h; ++j) {
							for (i = 0; i < cblk_w; ++i) {
								OPJ_INT32 tmp = datap[(j * cblk_w) + i];
								((OPJ_INT32*)tiledp)[(j * tile_w) + i] = tmp/2;
							}
						}
					} else {		/* if (tccp->qmfbid == 0) */
                        OPJ_FLOAT32* restrict tiledp = (OPJ_FLOAT32*) &tilec->data[(OPJ_UINT32)y * tile_w + (OPJ_UINT32)x];
						for (j = 0; j < cblk_h; ++j) {
                            OPJ_FLOAT32* restrict tiledp2 = tiledp;
							for (i = 0; i < cblk_w; ++i) {
                                OPJ_FLOAT32 tmp = (OPJ_FLOAT32)*datap * band->stepsize;
                                *tiledp2 = tmp;
                                datap++;
                                tiledp2++;
							}
                            tiledp += tile_w;
						}
					}
				} /* cblkno */
			} /* precno */
		} /* bandno */
	} /* resno */
        return OPJ_TRUE;
}


static OPJ_BOOL opj_t1_decode_cblk(opj_t1_t *t1,
                            opj_tcd_cblk_dec_t* cblk,
                            OPJ_UINT32 orient,
                            OPJ_UINT32 roishift,
                            OPJ_UINT32 cblksty)
{
	opj_raw_t *raw = t1->raw;	/* RAW component */
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */

	OPJ_INT32 bpno_plus_one;
	OPJ_UINT32 passtype;
	OPJ_UINT32 segno, passno;
	OPJ_BYTE type = T1_TYPE_MQ; /* BYPASS mode */

	if(!opj_t1_allocate_buffers(
				t1,
				(OPJ_UINT32)(cblk->x1 - cblk->x0),
				(OPJ_UINT32)(cblk->y1 - cblk->y0)))
	{
		return OPJ_FALSE;
	}

	bpno_plus_one = (OPJ_INT32)(roishift + cblk->numbps);
	passtype = 2;

	opj_mqc_resetstates(mqc);
	opj_mqc_setstate(mqc, T1_CTXNO_UNI, 0, 46);
	opj_mqc_setstate(mqc, T1_CTXNO_AGG, 0, 3);
	opj_mqc_setstate(mqc, T1_CTXNO_ZC, 0, 4);

	for (segno = 0; segno < cblk->real_num_segs; ++segno) {
		opj_tcd_seg_t *seg = &cblk->segs[segno];

		/* BYPASS mode */
		type = ((bpno_plus_one <= ((OPJ_INT32) (cblk->numbps)) - 4) && (passtype < 2) && (cblksty & J2K_CCP_CBLKSTY_LAZY)) ? T1_TYPE_RAW : T1_TYPE_MQ;
		/* FIXME: slviewer gets here with a null pointer. Why? Partially downloaded and/or corrupt textures? */
		if(seg->data == 00){
			continue;
		}
		if (type == T1_TYPE_RAW) {
			opj_raw_init_dec(raw, (*seg->data) + seg->dataindex, seg->len);
		} else {
            if (OPJ_FALSE == opj_mqc_init_dec(mqc, (*seg->data) + seg->dataindex, seg->len)) {
                    return OPJ_FALSE;
            }
		}

		for (passno = 0; (passno < seg->real_num_passes) && (bpno_plus_one >= 1); ++passno) {
            switch (passtype) {
                case 0:
                    if (type == T1_TYPE_RAW) {
                        opj_t1_dec_sigpass_raw(t1, bpno_plus_one, (OPJ_INT32)orient, (OPJ_INT32)cblksty);
                    } else {
                        if (cblksty & J2K_CCP_CBLKSTY_VSC) {
                            opj_t1_dec_sigpass_mqc_vsc(t1, bpno_plus_one, (OPJ_INT32)orient);
                        } else {
                            opj_t1_dec_sigpass_mqc(t1, bpno_plus_one, (OPJ_INT32)orient);
                        }
                    }
                    break;
                case 1:
                    if (type == T1_TYPE_RAW) {
                            opj_t1_dec_refpass_raw(t1, bpno_plus_one, (OPJ_INT32)cblksty);
                    } else {
                        if (cblksty & J2K_CCP_CBLKSTY_VSC) {
                            opj_t1_dec_refpass_mqc_vsc(t1, bpno_plus_one);
                        } else {
                            opj_t1_dec_refpass_mqc(t1, bpno_plus_one);
                        }
                    }
                    break;
                case 2:
                    opj_t1_dec_clnpass(t1, bpno_plus_one, (OPJ_INT32)orient, (OPJ_INT32)cblksty);
                    break;
            }

			if ((cblksty & J2K_CCP_CBLKSTY_RESET) && type == T1_TYPE_MQ) {
				opj_mqc_resetstates(mqc);
				opj_mqc_setstate(mqc, T1_CTXNO_UNI, 0, 46);
				opj_mqc_setstate(mqc, T1_CTXNO_AGG, 0, 3);
				opj_mqc_setstate(mqc, T1_CTXNO_ZC, 0, 4);
			}
			if (++passtype == 3) {
				passtype = 0;
				bpno_plus_one--;
			}
		}
	}
    return OPJ_TRUE;
}


OPJ_BOOL opj_t1_encode_cblks(   opj_t1_t *t1,
                                opj_tcd_tile_t *tile,
                                opj_tcp_t *tcp,
                                const OPJ_FLOAT64 * mct_norms,
                                OPJ_UINT32 mct_numcomps
                                )
{
	OPJ_UINT32 compno, resno, bandno, precno, cblkno;

	tile->distotile = 0;		/* fixed_quality */

	for (compno = 0; compno < tile->numcomps; ++compno) {
		opj_tcd_tilecomp_t* tilec = &tile->comps[compno];
		opj_tccp_t* tccp = &tcp->tccps[compno];
		OPJ_UINT32 tile_w = (OPJ_UINT32)(tilec->x1 - tilec->x0);

		for (resno = 0; resno < tilec->numresolutions; ++resno) {
			opj_tcd_resolution_t *res = &tilec->resolutions[resno];

			for (bandno = 0; bandno < res->numbands; ++bandno) {
				opj_tcd_band_t* restrict band = &res->bands[bandno];
                OPJ_INT32 bandconst = 8192 * 8192 / ((OPJ_INT32) floor(band->stepsize * 8192));

				for (precno = 0; precno < res->pw * res->ph; ++precno) {
					opj_tcd_precinct_t *prc = &band->precincts[precno];

					for (cblkno = 0; cblkno < prc->cw * prc->ch; ++cblkno) {
						opj_tcd_cblk_enc_t* cblk = &prc->cblks.enc[cblkno];
						OPJ_INT32* restrict tiledp;
						OPJ_UINT32 cblk_w;
						OPJ_UINT32 cblk_h;
						OPJ_UINT32 i, j, tileIndex=0, tileLineAdvance;

						OPJ_INT32 x = cblk->x0 - band->x0;
						OPJ_INT32 y = cblk->y0 - band->y0;
						if (band->bandno & 1) {
							opj_tcd_resolution_t *pres = &tilec->resolutions[resno - 1];
							x += pres->x1 - pres->x0;
						}
						if (band->bandno & 2) {
							opj_tcd_resolution_t *pres = &tilec->resolutions[resno - 1];
							y += pres->y1 - pres->y0;
						}

						if(!opj_t1_allocate_buffers(
									t1,
									(OPJ_UINT32)(cblk->x1 - cblk->x0),
									(OPJ_UINT32)(cblk->y1 - cblk->y0)))
						{
							return OPJ_FALSE;
						}

						cblk_w = t1->w;
						cblk_h = t1->h;
						tileLineAdvance = tile_w - cblk_w;

						tiledp=&tilec->data[(OPJ_UINT32)y * tile_w + (OPJ_UINT32)x];
						t1->data = tiledp;
						t1->data_stride = tile_w;
						if (tccp->qmfbid == 1) {
							for (j = 0; j < cblk_h; ++j) {
								for (i = 0; i < cblk_w; ++i) {
									tiledp[tileIndex] <<= T1_NMSEDEC_FRACBITS;
									tileIndex++;
								}
								tileIndex += tileLineAdvance;
							}
						} else {		/* if (tccp->qmfbid == 0) */
							for (j = 0; j < cblk_h; ++j) {
								for (i = 0; i < cblk_w; ++i) {
									OPJ_INT32 tmp = tiledp[tileIndex];
									tiledp[tileIndex] =
										opj_int_fix_mul_t1(
										tmp,
										bandconst);
									tileIndex++;
								}
								tileIndex += tileLineAdvance;
							}
						}

						opj_t1_encode_cblk(
								t1,
								cblk,
								band->bandno,
								compno,
								tilec->numresolutions - 1 - resno,
								tccp->qmfbid,
								band->stepsize,
								tccp->cblksty,
								tile->numcomps,
								tile,
								mct_norms,
								mct_numcomps);

					} /* cblkno */
				} /* precno */
			} /* bandno */
		} /* resno  */
	} /* compno  */
	return OPJ_TRUE;
}

/** mod fixed_quality */
static void opj_t1_encode_cblk(opj_t1_t *t1,
                        opj_tcd_cblk_enc_t* cblk,
                        OPJ_UINT32 orient,
                        OPJ_UINT32 compno,
                        OPJ_UINT32 level,
                        OPJ_UINT32 qmfbid,
                        OPJ_FLOAT64 stepsize,
                        OPJ_UINT32 cblksty,
                        OPJ_UINT32 numcomps,
                        opj_tcd_tile_t * tile,
                        const OPJ_FLOAT64 * mct_norms,
                        OPJ_UINT32 mct_numcomps)
{
	OPJ_FLOAT64 cumwmsedec = 0.0;

	opj_mqc_t *mqc = t1->mqc;	/* MQC component */

	OPJ_UINT32 passno;
	OPJ_INT32 bpno;
	OPJ_UINT32 passtype;
	OPJ_INT32 nmsedec = 0;
	OPJ_INT32 max;
	OPJ_UINT32 i, j;
	OPJ_BYTE type = T1_TYPE_MQ;
	OPJ_FLOAT64 tempwmsedec;

	max = 0;
	for (i = 0; i < t1->w; ++i) {
		for (j = 0; j < t1->h; ++j) {
			OPJ_INT32 tmp = abs(t1->data[i + j*t1->data_stride]);
			max = opj_int_max(max, tmp);
		}
	}

	cblk->numbps = max ? (OPJ_UINT32)((opj_int_floorlog2(max) + 1) - T1_NMSEDEC_FRACBITS) : 0;

	bpno = (OPJ_INT32)(cblk->numbps - 1);
	passtype = 2;

	opj_mqc_resetstates(mqc);
	opj_mqc_setstate(mqc, T1_CTXNO_UNI, 0, 46);
	opj_mqc_setstate(mqc, T1_CTXNO_AGG, 0, 3);
	opj_mqc_setstate(mqc, T1_CTXNO_ZC, 0, 4);
	opj_mqc_init_enc(mqc, cblk->data);

	for (passno = 0; bpno >= 0; ++passno) {
		opj_tcd_pass_t *pass = &cblk->passes[passno];
		OPJ_UINT32 correction = 3;
		type = ((bpno < ((OPJ_INT32) (cblk->numbps) - 4)) && (passtype < 2) && (cblksty & J2K_CCP_CBLKSTY_LAZY)) ? T1_TYPE_RAW : T1_TYPE_MQ;

		switch (passtype) {
			case 0:
				opj_t1_enc_sigpass(t1, bpno, orient, &nmsedec, type, cblksty);
				break;
			case 1:
				opj_t1_enc_refpass(t1, bpno, &nmsedec, type, cblksty);
				break;
			case 2:
				opj_t1_enc_clnpass(t1, bpno, orient, &nmsedec, cblksty);
				/* code switch SEGMARK (i.e. SEGSYM) */
				if (cblksty & J2K_CCP_CBLKSTY_SEGSYM)
					opj_mqc_segmark_enc(mqc);
				break;
		}

		/* fixed_quality */
		tempwmsedec = opj_t1_getwmsedec(nmsedec, compno, level, orient, bpno, qmfbid, stepsize, numcomps,mct_norms, mct_numcomps) ;
		cumwmsedec += tempwmsedec;
		tile->distotile += tempwmsedec;

		/* Code switch "RESTART" (i.e. TERMALL) */
		if ((cblksty & J2K_CCP_CBLKSTY_TERMALL)	&& !((passtype == 2) && (bpno - 1 < 0))) {
			if (type == T1_TYPE_RAW) {
				opj_mqc_flush(mqc);
				correction = 1;
				/* correction = mqc_bypass_flush_enc(); */
			} else {			/* correction = mqc_restart_enc(); */
				opj_mqc_flush(mqc);
				correction = 1;
			}
			pass->term = 1;
		} else {
			if (((bpno < ((OPJ_INT32) (cblk->numbps) - 4) && (passtype > 0))
				|| ((bpno == ((OPJ_INT32)cblk->numbps - 4)) && (passtype == 2))) && (cblksty & J2K_CCP_CBLKSTY_LAZY)) {
				if (type == T1_TYPE_RAW) {
					opj_mqc_flush(mqc);
					correction = 1;
					/* correction = mqc_bypass_flush_enc(); */
				} else {		/* correction = mqc_restart_enc(); */
					opj_mqc_flush(mqc);
					correction = 1;
				}
				pass->term = 1;
			} else {
				pass->term = 0;
			}
		}

		if (++passtype == 3) {
			passtype = 0;
			bpno--;
		}

		if (pass->term && bpno > 0) {
			type = ((bpno < ((OPJ_INT32) (cblk->numbps) - 4)) && (passtype < 2) && (cblksty & J2K_CCP_CBLKSTY_LAZY)) ? T1_TYPE_RAW : T1_TYPE_MQ;
			if (type == T1_TYPE_RAW)
				opj_mqc_bypass_init_enc(mqc);
			else
				opj_mqc_restart_init_enc(mqc);
		}

		pass->distortiondec = cumwmsedec;
		pass->rate = opj_mqc_numbytes(mqc) + correction;	/* FIXME */

		/* Code-switch "RESET" */
		if (cblksty & J2K_CCP_CBLKSTY_RESET)
			opj_mqc_reset_enc(mqc);
	}

	/* Code switch "ERTERM" (i.e. PTERM) */
	if (cblksty & J2K_CCP_CBLKSTY_PTERM)
		opj_mqc_erterm_enc(mqc);
	else /* Default coding */ if (!(cblksty & J2K_CCP_CBLKSTY_LAZY))
		opj_mqc_flush(mqc);

	cblk->totalpasses = passno;

	for (passno = 0; passno<cblk->totalpasses; passno++) {
		opj_tcd_pass_t *pass = &cblk->passes[passno];
		if (pass->rate > opj_mqc_numbytes(mqc))
			pass->rate = opj_mqc_numbytes(mqc);
		/*Preventing generation of FF as last data byte of a pass*/
		if((pass->rate>1) && (cblk->data[pass->rate - 1] == 0xFF)){
			pass->rate--;
		}
		pass->len = pass->rate - (passno == 0 ? 0 : cblk->passes[passno - 1].rate);
	}
}

#if 0
static void opj_t1_dec_refpass_step(   opj_t1_t *t1,
                                opj_flag_t *flagsp,
                                OPJ_INT32 *datap,
                                OPJ_INT32 poshalf,
                                OPJ_INT32 neghalf,
                                OPJ_BYTE type,
                                OPJ_UINT32 vsc)
{
	OPJ_INT32  t;
	OPJ_UINT32 v,flag;

	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
	opj_raw_t *raw = t1->raw;	/* RAW component */

	flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
	if ((flag & (T1_SIG | T1_VISIT)) == T1_SIG) {
		opj_mqc_setcurctx(mqc, opj_t1_getctxno_mag(flag));	/* ESSAI */
		if (type == T1_TYPE_RAW) {
			v = opj_raw_decode(raw);
		} else {
			v = opj_mqc_decode(mqc);
		}
		t = v ? poshalf : neghalf;
		*datap += *datap < 0 ? -t : t;
		*flagsp |= T1_REFINE;
	}
}				/* VSC and  BYPASS by Antonin  */
#endif


#if 0
static void opj_t1_dec_sigpass_step(   opj_t1_t *t1,
                                opj_flag_t *flagsp,
                                OPJ_INT32 *datap,
                                OPJ_UINT32 orient,
                                OPJ_INT32 oneplushalf,
                                OPJ_BYTE type,
                                OPJ_UINT32 vsc)
{
	OPJ_UINT32 v, flag;

	opj_raw_t *raw = t1->raw;	/* RAW component */
	opj_mqc_t *mqc = t1->mqc;	/* MQC component */

	flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
	if ((flag & T1_SIG_OTH) && !(flag & (T1_SIG | T1_VISIT))) {
		if (type == T1_TYPE_RAW) {
			if (opj_raw_decode(raw)) {
				v = opj_raw_decode(raw);	/* ESSAI */
				*datap = v ? -oneplushalf : oneplushalf;
				opj_t1_updateflags(flagsp, v, t1->flags_stride);
			}
		} else {
			opj_mqc_setcurctx(mqc, opj_t1_getctxno_zc(flag, orient));
			if (opj_mqc_decode(mqc)) {
				opj_mqc_setcurctx(mqc, opj_t1_getctxno_sc(flag));
				v = opj_mqc_decode(mqc) ^ opj_t1_getspb(flag);
				*datap = v ? -oneplushalf : oneplushalf;
				opj_t1_updateflags(flagsp, v, t1->flags_stride);
			}
		}
		*flagsp |= T1_VISIT;
	}
}				/* VSC and  BYPASS by Antonin */
#endif