xref: /external/opencv3/3rdparty/libjasper/jpc_cs.c

/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2002 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
 *
 * JasPer License Version 2.0
 *
 * Copyright (c) 2001-2006 Michael David Adams
 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 *
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person (the
 * "User") obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 *
 * 1.  The above copyright notices and this permission notice (which
 * includes the disclaimer below) shall be included in all copies or
 * substantial portions of the Software.
 *
 * 2.  The name of a copyright holder shall not be used to endorse or
 * promote products derived from the Software without specific prior
 * written permission.
 *
 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
 * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
 * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
 * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
 *
 * __END_OF_JASPER_LICENSE__
 */

/*
 * JPEG-2000 Code Stream Library
 *
 * $Id: jpc_cs.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
 */

/******************************************************************************\
* Includes.
\******************************************************************************/

#include <stdlib.h>
#include <assert.h>
#include <ctype.h>

#include "jasper/jas_malloc.h"
#include "jasper/jas_debug.h"

#include "jpc_cs.h"

/******************************************************************************\
* Types.
\******************************************************************************/

/* Marker segment table entry. */
typedef struct {
    int id;
    char *name;
    jpc_msops_t ops;
} jpc_mstabent_t;

/******************************************************************************\
* Local prototypes.
\******************************************************************************/

static jpc_mstabent_t *jpc_mstab_lookup(int id);

static int jpc_poc_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_poc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_poc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static void jpc_poc_destroyparms(jpc_ms_t *ms);

static int jpc_unk_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_sot_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_siz_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_cod_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_coc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_qcd_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_qcc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_rgn_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_sop_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_ppm_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_ppt_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_crg_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);
static int jpc_com_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in);

static int jpc_sot_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_siz_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_cod_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_coc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_qcd_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_qcc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_rgn_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_unk_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_sop_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_ppm_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_ppt_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_crg_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);
static int jpc_com_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out);

static int jpc_sot_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_siz_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_cod_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_coc_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_qcd_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_qcc_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_rgn_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_unk_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_sop_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_ppm_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_ppt_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_crg_dumpparms(jpc_ms_t *ms, FILE *out);
static int jpc_com_dumpparms(jpc_ms_t *ms, FILE *out);

static void jpc_siz_destroyparms(jpc_ms_t *ms);
static void jpc_qcd_destroyparms(jpc_ms_t *ms);
static void jpc_qcc_destroyparms(jpc_ms_t *ms);
static void jpc_cod_destroyparms(jpc_ms_t *ms);
static void jpc_coc_destroyparms(jpc_ms_t *ms);
static void jpc_unk_destroyparms(jpc_ms_t *ms);
static void jpc_ppm_destroyparms(jpc_ms_t *ms);
static void jpc_ppt_destroyparms(jpc_ms_t *ms);
static void jpc_crg_destroyparms(jpc_ms_t *ms);
static void jpc_com_destroyparms(jpc_ms_t *ms);

static void jpc_qcx_destroycompparms(jpc_qcxcp_t *compparms);
static int jpc_qcx_getcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *in, uint_fast16_t len);
static int jpc_qcx_putcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *out);
static void jpc_cox_destroycompparms(jpc_coxcp_t *compparms);
static int jpc_cox_getcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *in, int prtflag, jpc_coxcp_t *compparms);
static int jpc_cox_putcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *out, int prtflag, jpc_coxcp_t *compparms);

/******************************************************************************\
* Global data.
\******************************************************************************/

static jpc_mstabent_t jpc_mstab[] = {
    {JPC_MS_SOC, "SOC", {0, 0, 0, 0}},
    {JPC_MS_SOT, "SOT", {0, jpc_sot_getparms, jpc_sot_putparms,
      jpc_sot_dumpparms}},
    {JPC_MS_SOD, "SOD", {0, 0, 0, 0}},
    {JPC_MS_EOC, "EOC", {0, 0, 0, 0}},
    {JPC_MS_SIZ, "SIZ", {jpc_siz_destroyparms, jpc_siz_getparms,
      jpc_siz_putparms, jpc_siz_dumpparms}},
    {JPC_MS_COD, "COD", {jpc_cod_destroyparms, jpc_cod_getparms,
      jpc_cod_putparms, jpc_cod_dumpparms}},
    {JPC_MS_COC, "COC", {jpc_coc_destroyparms, jpc_coc_getparms,
      jpc_coc_putparms, jpc_coc_dumpparms}},
    {JPC_MS_RGN, "RGN", {0, jpc_rgn_getparms, jpc_rgn_putparms,
      jpc_rgn_dumpparms}},
    {JPC_MS_QCD, "QCD", {jpc_qcd_destroyparms, jpc_qcd_getparms,
      jpc_qcd_putparms, jpc_qcd_dumpparms}},
    {JPC_MS_QCC, "QCC", {jpc_qcc_destroyparms, jpc_qcc_getparms,
      jpc_qcc_putparms, jpc_qcc_dumpparms}},
    {JPC_MS_POC, "POC", {jpc_poc_destroyparms, jpc_poc_getparms,
      jpc_poc_putparms, jpc_poc_dumpparms}},
    {JPC_MS_TLM, "TLM", {0, jpc_unk_getparms, jpc_unk_putparms, 0}},
    {JPC_MS_PLM, "PLM", {0, jpc_unk_getparms, jpc_unk_putparms, 0}},
    {JPC_MS_PPM, "PPM", {jpc_ppm_destroyparms, jpc_ppm_getparms,
      jpc_ppm_putparms, jpc_ppm_dumpparms}},
    {JPC_MS_PPT, "PPT", {jpc_ppt_destroyparms, jpc_ppt_getparms,
      jpc_ppt_putparms, jpc_ppt_dumpparms}},
    {JPC_MS_SOP, "SOP", {0, jpc_sop_getparms, jpc_sop_putparms,
      jpc_sop_dumpparms}},
    {JPC_MS_EPH, "EPH", {0, 0, 0, 0}},
    {JPC_MS_CRG, "CRG", {0, jpc_crg_getparms, jpc_crg_putparms,
      jpc_crg_dumpparms}},
    {JPC_MS_COM, "COM", {jpc_com_destroyparms, jpc_com_getparms,
      jpc_com_putparms, jpc_com_dumpparms}},
    {-1, "UNKNOWN",  {jpc_unk_destroyparms, jpc_unk_getparms,
      jpc_unk_putparms, jpc_unk_dumpparms}}
};

/******************************************************************************\
* Code stream manipulation functions.
\******************************************************************************/

/* Create a code stream state object. */
jpc_cstate_t *jpc_cstate_create()
{
    jpc_cstate_t *cstate;
    if (!(cstate = jas_malloc(sizeof(jpc_cstate_t)))) {
        return 0;
    }
    cstate->numcomps = 0;
    return cstate;
}

/* Destroy a code stream state object. */
void jpc_cstate_destroy(jpc_cstate_t *cstate)
{
    jas_free(cstate);
}

/* Read a marker segment from a stream. */
jpc_ms_t *jpc_getms(jas_stream_t *in, jpc_cstate_t *cstate)
{
    jpc_ms_t *ms;
    jpc_mstabent_t *mstabent;
    jas_stream_t *tmpstream;

    if (!(ms = jpc_ms_create(0))) {
        return 0;
    }

    /* Get the marker type. */
    if (jpc_getuint16(in, &ms->id) || ms->id < JPC_MS_MIN /*|| ms->id > JPC_MS_MAX*/) {
        jpc_ms_destroy(ms);
        return 0;
    }

    mstabent = jpc_mstab_lookup(ms->id);
    ms->ops = &mstabent->ops;

    /* Get the marker segment length and parameters if present. */
    /* Note: It is tacitly assumed that a marker segment cannot have
      parameters unless it has a length field.  That is, there cannot
      be a parameters field without a length field and vice versa. */
    if (JPC_MS_HASPARMS(ms->id)) {
        /* Get the length of the marker segment. */
        if (jpc_getuint16(in, &ms->len) || ms->len < 3) {
            jpc_ms_destroy(ms);
            return 0;
        }
        /* Calculate the length of the marker segment parameters. */
        ms->len -= 2;
        /* Create and prepare a temporary memory stream from which to
          read the marker segment parameters. */
        /* Note: This approach provides a simple way of ensuring that
          we never read beyond the end of the marker segment (even if
          the marker segment length is errantly set too small). */
        if (!(tmpstream = jas_stream_memopen(0, 0))) {
            jpc_ms_destroy(ms);
            return 0;
        }
        if (jas_stream_copy(tmpstream, in, ms->len) ||
          jas_stream_seek(tmpstream, 0, SEEK_SET) < 0) {
            jas_stream_close(tmpstream);
            jpc_ms_destroy(ms);
            return 0;
        }
        /* Get the marker segment parameters. */
        if ((*ms->ops->getparms)(ms, cstate, tmpstream)) {
            ms->ops = 0;
            jpc_ms_destroy(ms);
            jas_stream_close(tmpstream);
            return 0;
        }

        if (jas_getdbglevel() > 0) {
            jpc_ms_dump(ms, stderr);
        }

        if (JAS_CAST(ulong, jas_stream_tell(tmpstream)) != ms->len) {
            jas_eprintf("warning: trailing garbage in marker segment (%ld bytes)\n",
              ms->len - jas_stream_tell(tmpstream));
        }

        /* Close the temporary stream. */
        jas_stream_close(tmpstream);

    } else {
        /* There are no marker segment parameters. */
        ms->len = 0;

        if (jas_getdbglevel() > 0) {
            jpc_ms_dump(ms, stderr);
        }
    }

    /* Update the code stream state information based on the type of
      marker segment read. */
    /* Note: This is a bit of a hack, but I'm not going to define another
      type of virtual function for this one special case. */
    if (ms->id == JPC_MS_SIZ) {
        cstate->numcomps = ms->parms.siz.numcomps;
    }

    return ms;
}

/* Write a marker segment to a stream. */
int jpc_putms(jas_stream_t *out, jpc_cstate_t *cstate, jpc_ms_t *ms)
{
    jas_stream_t *tmpstream;
    int len;

    /* Output the marker segment type. */
    if (jpc_putuint16(out, ms->id)) {
        return -1;
    }

    /* Output the marker segment length and parameters if necessary. */
    if (ms->ops->putparms) {
        /* Create a temporary stream in which to buffer the
          parameter data. */
        if (!(tmpstream = jas_stream_memopen(0, 0))) {
            return -1;
        }
        if ((*ms->ops->putparms)(ms, cstate, tmpstream)) {
            jas_stream_close(tmpstream);
            return -1;
        }
        /* Get the number of bytes of parameter data written. */
        if ((len = jas_stream_tell(tmpstream)) < 0) {
            jas_stream_close(tmpstream);
            return -1;
        }
        ms->len = len;
        /* Write the marker segment length and parameter data to
          the output stream. */
        if (jas_stream_seek(tmpstream, 0, SEEK_SET) < 0 ||
          jpc_putuint16(out, ms->len + 2) ||
          jas_stream_copy(out, tmpstream, ms->len) < 0) {
            jas_stream_close(tmpstream);
            return -1;
        }
        /* Close the temporary stream. */
        jas_stream_close(tmpstream);
    }

    /* This is a bit of a hack, but I'm not going to define another
      type of virtual function for this one special case. */
    if (ms->id == JPC_MS_SIZ) {
        cstate->numcomps = ms->parms.siz.numcomps;
    }

    if (jas_getdbglevel() > 0) {
        jpc_ms_dump(ms, stderr);
    }

    return 0;
}

/******************************************************************************\
* Marker segment operations.
\******************************************************************************/

/* Create a marker segment of the specified type. */
jpc_ms_t *jpc_ms_create(int type)
{
    jpc_ms_t *ms;
    jpc_mstabent_t *mstabent;

    if (!(ms = jas_malloc(sizeof(jpc_ms_t)))) {
        return 0;
    }
    ms->id = type;
    ms->len = 0;
    mstabent = jpc_mstab_lookup(ms->id);
    ms->ops = &mstabent->ops;
    memset(&ms->parms, 0, sizeof(jpc_msparms_t));
    return ms;
}

/* Destroy a marker segment. */
void jpc_ms_destroy(jpc_ms_t *ms)
{
    if (ms->ops && ms->ops->destroyparms) {
        (*ms->ops->destroyparms)(ms);
    }
    jas_free(ms);
}

/* Dump a marker segment to a stream for debugging. */
void jpc_ms_dump(jpc_ms_t *ms, FILE *out)
{
    jpc_mstabent_t *mstabent;
    mstabent = jpc_mstab_lookup(ms->id);
    fprintf(out, "type = 0x%04x (%s);", (unsigned)ms->id, mstabent->name);
    if (JPC_MS_HASPARMS(ms->id)) {
        fprintf(out, " len = %d;", (int)(ms->len + 2));
        if (ms->ops->dumpparms) {
            (*ms->ops->dumpparms)(ms, out);
        } else {
            fprintf(out, "\n");
        }
    } else {
        fprintf(out, "\n");
    }
}

/******************************************************************************\
* SOT marker segment operations.
\******************************************************************************/

static int jpc_sot_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_sot_t *sot = &ms->parms.sot;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    if (jpc_getuint16(in, &sot->tileno) ||
      jpc_getuint32(in, &sot->len) ||
      jpc_getuint8(in, &sot->partno) ||
      jpc_getuint8(in, &sot->numparts)) {
        return -1;
    }
    if (jas_stream_eof(in)) {
        return -1;
    }
    return 0;
}

static int jpc_sot_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_sot_t *sot = &ms->parms.sot;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    if (jpc_putuint16(out, sot->tileno) ||
      jpc_putuint32(out, sot->len) ||
      jpc_putuint8(out, sot->partno) ||
      jpc_putuint8(out, sot->numparts)) {
        return -1;
    }
    return 0;
}

static int jpc_sot_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_sot_t *sot = &ms->parms.sot;
    fprintf(out, "tileno = %d; len = %d; partno = %d; numparts = %d\n",
      (int)sot->tileno, (int)sot->len, sot->partno, sot->numparts);
    return 0;
}

/******************************************************************************\
* SIZ marker segment operations.
\******************************************************************************/

static void jpc_siz_destroyparms(jpc_ms_t *ms)
{
    jpc_siz_t *siz = &ms->parms.siz;
    if (siz->comps) {
        jas_free(siz->comps);
    }
}

static int jpc_siz_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *in)
{
    jpc_siz_t *siz = &ms->parms.siz;
    unsigned int i;
    uint_fast8_t tmp;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    if (jpc_getuint16(in, &siz->caps) ||
      jpc_getuint32(in, &siz->width) ||
      jpc_getuint32(in, &siz->height) ||
      jpc_getuint32(in, &siz->xoff) ||
      jpc_getuint32(in, &siz->yoff) ||
      jpc_getuint32(in, &siz->tilewidth) ||
      jpc_getuint32(in, &siz->tileheight) ||
      jpc_getuint32(in, &siz->tilexoff) ||
      jpc_getuint32(in, &siz->tileyoff) ||
      jpc_getuint16(in, &siz->numcomps)) {
        return -1;
    }
    if (!siz->width || !siz->height || !siz->tilewidth ||
      !siz->tileheight || !siz->numcomps) {
        return -1;
    }
    if (!(siz->comps = jas_alloc2(siz->numcomps, sizeof(jpc_sizcomp_t)))) {
        return -1;
    }
    for (i = 0; i < siz->numcomps; ++i) {
        if (jpc_getuint8(in, &tmp) ||
          jpc_getuint8(in, &siz->comps[i].hsamp) ||
          jpc_getuint8(in, &siz->comps[i].vsamp)) {
            jas_free(siz->comps);
            return -1;
        }
        siz->comps[i].sgnd = (tmp >> 7) & 1;
        siz->comps[i].prec = (tmp & 0x7f) + 1;
    }
    if (jas_stream_eof(in)) {
        jas_free(siz->comps);
        return -1;
    }
    return 0;
}

static int jpc_siz_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_siz_t *siz = &ms->parms.siz;
    unsigned int i;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    assert(siz->width && siz->height && siz->tilewidth &&
      siz->tileheight && siz->numcomps);
    if (jpc_putuint16(out, siz->caps) ||
      jpc_putuint32(out, siz->width) ||
      jpc_putuint32(out, siz->height) ||
      jpc_putuint32(out, siz->xoff) ||
      jpc_putuint32(out, siz->yoff) ||
      jpc_putuint32(out, siz->tilewidth) ||
      jpc_putuint32(out, siz->tileheight) ||
      jpc_putuint32(out, siz->tilexoff) ||
      jpc_putuint32(out, siz->tileyoff) ||
      jpc_putuint16(out, siz->numcomps)) {
        return -1;
    }
    for (i = 0; i < siz->numcomps; ++i) {
        if (jpc_putuint8(out, ((siz->comps[i].sgnd & 1) << 7) |
          ((siz->comps[i].prec - 1) & 0x7f)) ||
          jpc_putuint8(out, siz->comps[i].hsamp) ||
          jpc_putuint8(out, siz->comps[i].vsamp)) {
            return -1;
        }
    }
    return 0;
}

static int jpc_siz_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_siz_t *siz = &ms->parms.siz;
    unsigned int i;
    fprintf(out, "caps = 0x%02x;\n", (unsigned)siz->caps);
    fprintf(out, "width = %d; height = %d; xoff = %d; yoff = %d;\n",
      (int)siz->width, (int)siz->height, (int)siz->xoff, (int)siz->yoff);
    fprintf(out, "tilewidth = %d; tileheight = %d; tilexoff = %d; "
      "tileyoff = %d;\n", (int)siz->tilewidth, (int)siz->tileheight, (int)siz->tilexoff,
      (int)siz->tileyoff);
    for (i = 0; i < siz->numcomps; ++i) {
        fprintf(out, "prec[%d] = %d; sgnd[%d] = %d; hsamp[%d] = %d; "
          "vsamp[%d] = %d\n", i, siz->comps[i].prec, i,
          siz->comps[i].sgnd, i, siz->comps[i].hsamp, i,
          siz->comps[i].vsamp);
    }
    return 0;
}

/******************************************************************************\
* COD marker segment operations.
\******************************************************************************/

static void jpc_cod_destroyparms(jpc_ms_t *ms)
{
    jpc_cod_t *cod = &ms->parms.cod;
    jpc_cox_destroycompparms(&cod->compparms);
}

static int jpc_cod_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_cod_t *cod = &ms->parms.cod;
    if (jpc_getuint8(in, &cod->csty)) {
        return -1;
    }
    if (jpc_getuint8(in, &cod->prg) ||
      jpc_getuint16(in, &cod->numlyrs) ||
      jpc_getuint8(in, &cod->mctrans)) {
        return -1;
    }
    if (jpc_cox_getcompparms(ms, cstate, in,
      (cod->csty & JPC_COX_PRT) != 0, &cod->compparms)) {
        return -1;
    }
    if (jas_stream_eof(in)) {
        jpc_cod_destroyparms(ms);
        return -1;
    }
    return 0;
}

static int jpc_cod_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_cod_t *cod = &ms->parms.cod;
    assert(cod->numlyrs > 0 && cod->compparms.numdlvls <= 32);
    assert(cod->compparms.numdlvls == cod->compparms.numrlvls - 1);
    if (jpc_putuint8(out, cod->compparms.csty) ||
      jpc_putuint8(out, cod->prg) ||
      jpc_putuint16(out, cod->numlyrs) ||
      jpc_putuint8(out, cod->mctrans)) {
        return -1;
    }
    if (jpc_cox_putcompparms(ms, cstate, out,
      (cod->csty & JPC_COX_PRT) != 0, &cod->compparms)) {
        return -1;
    }
    return 0;
}

static int jpc_cod_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_cod_t *cod = &ms->parms.cod;
    int i;
    fprintf(out, "csty = 0x%02x;\n", cod->compparms.csty);
    fprintf(out, "numdlvls = %d; qmfbid = %d; mctrans = %d\n",
      cod->compparms.numdlvls, cod->compparms.qmfbid, cod->mctrans);
    fprintf(out, "prg = %d; numlyrs = %d;\n",
      cod->prg, (int)cod->numlyrs);
    fprintf(out, "cblkwidthval = %d; cblkheightval = %d; "
      "cblksty = 0x%02x;\n", cod->compparms.cblkwidthval, cod->compparms.cblkheightval,
      cod->compparms.cblksty);
    if (cod->csty & JPC_COX_PRT) {
        for (i = 0; i < cod->compparms.numrlvls; ++i) {
            jas_eprintf("prcwidth[%d] = %d, prcheight[%d] = %d\n",
              i, cod->compparms.rlvls[i].parwidthval,
              i, cod->compparms.rlvls[i].parheightval);
        }
    }
    return 0;
}

/******************************************************************************\
* COC marker segment operations.
\******************************************************************************/

static void jpc_coc_destroyparms(jpc_ms_t *ms)
{
    jpc_coc_t *coc = &ms->parms.coc;
    jpc_cox_destroycompparms(&coc->compparms);
}

static int jpc_coc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_coc_t *coc = &ms->parms.coc;
    uint_fast8_t tmp;
    if (cstate->numcomps <= 256) {
        if (jpc_getuint8(in, &tmp)) {
            return -1;
        }
        coc->compno = tmp;
    } else {
        if (jpc_getuint16(in, &coc->compno)) {
            return -1;
        }
    }
    if (jpc_getuint8(in, &coc->compparms.csty)) {
        return -1;
    }
    if (jpc_cox_getcompparms(ms, cstate, in,
      (coc->compparms.csty & JPC_COX_PRT) != 0, &coc->compparms)) {
        return -1;
    }
    if (jas_stream_eof(in)) {
        return -1;
    }
    return 0;
}

static int jpc_coc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_coc_t *coc = &ms->parms.coc;
    assert(coc->compparms.numdlvls <= 32);
    if (cstate->numcomps <= 256) {
        if (jpc_putuint8(out, coc->compno)) {
            return -1;
        }
    } else {
        if (jpc_putuint16(out, coc->compno)) {
            return -1;
        }
    }
    if (jpc_putuint8(out, coc->compparms.csty)) {
        return -1;
    }
    if (jpc_cox_putcompparms(ms, cstate, out,
      (coc->compparms.csty & JPC_COX_PRT) != 0, &coc->compparms)) {
        return -1;
    }
    return 0;
}

static int jpc_coc_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_coc_t *coc = &ms->parms.coc;
    fprintf(out, "compno = %d; csty = 0x%02x; numdlvls = %d;\n",
      (int)coc->compno, coc->compparms.csty, coc->compparms.numdlvls);
    fprintf(out, "cblkwidthval = %d; cblkheightval = %d; "
      "cblksty = 0x%02x; qmfbid = %d;\n", coc->compparms.cblkwidthval,
      coc->compparms.cblkheightval, coc->compparms.cblksty, coc->compparms.qmfbid);
    return 0;
}
/******************************************************************************\
* COD/COC marker segment operation helper functions.
\******************************************************************************/

static void jpc_cox_destroycompparms(jpc_coxcp_t *compparms)
{
    /* Eliminate compiler warning about unused variables. */
    compparms = 0;
}

static int jpc_cox_getcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *in, int prtflag, jpc_coxcp_t *compparms)
{
    uint_fast8_t tmp;
    int i;

    /* Eliminate compiler warning about unused variables. */
    ms = 0;
    cstate = 0;

    if (jpc_getuint8(in, &compparms->numdlvls) ||
      jpc_getuint8(in, &compparms->cblkwidthval) ||
      jpc_getuint8(in, &compparms->cblkheightval) ||
      jpc_getuint8(in, &compparms->cblksty) ||
      jpc_getuint8(in, &compparms->qmfbid)) {
        return -1;
    }
    compparms->numrlvls = compparms->numdlvls + 1;
    if (compparms->numrlvls > JPC_MAXRLVLS) {
        jpc_cox_destroycompparms(compparms);
        return -1;
    }
    if (prtflag) {
        for (i = 0; i < compparms->numrlvls; ++i) {
            if (jpc_getuint8(in, &tmp)) {
                jpc_cox_destroycompparms(compparms);
                return -1;
            }
            compparms->rlvls[i].parwidthval = tmp & 0xf;
            compparms->rlvls[i].parheightval = (tmp >> 4) & 0xf;
        }
/* Sigh.  This bit should be in the same field in both COC and COD mrk segs. */
compparms->csty |= JPC_COX_PRT;
    } else {
    }
    if (jas_stream_eof(in)) {
        jpc_cox_destroycompparms(compparms);
        return -1;
    }
    return 0;
}

static int jpc_cox_putcompparms(jpc_ms_t *ms, jpc_cstate_t *cstate,
  jas_stream_t *out, int prtflag, jpc_coxcp_t *compparms)
{
    int i;
    assert(compparms->numdlvls <= 32);

    /* Eliminate compiler warning about unused variables. */
    ms = 0;
    cstate = 0;

    if (jpc_putuint8(out, compparms->numdlvls) ||
      jpc_putuint8(out, compparms->cblkwidthval) ||
      jpc_putuint8(out, compparms->cblkheightval) ||
      jpc_putuint8(out, compparms->cblksty) ||
      jpc_putuint8(out, compparms->qmfbid)) {
        return -1;
    }
    if (prtflag) {
        for (i = 0; i < compparms->numrlvls; ++i) {
            if (jpc_putuint8(out,
              ((compparms->rlvls[i].parheightval & 0xf) << 4) |
              (compparms->rlvls[i].parwidthval & 0xf))) {
                return -1;
            }
        }
    }
    return 0;
}

/******************************************************************************\
* RGN marker segment operations.
\******************************************************************************/

static int jpc_rgn_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_rgn_t *rgn = &ms->parms.rgn;
    uint_fast8_t tmp;
    if (cstate->numcomps <= 256) {
        if (jpc_getuint8(in, &tmp)) {
            return -1;
        }
        rgn->compno = tmp;
    } else {
        if (jpc_getuint16(in, &rgn->compno)) {
            return -1;
        }
    }
    if (jpc_getuint8(in, &rgn->roisty) ||
      jpc_getuint8(in, &rgn->roishift)) {
        return -1;
    }
    return 0;
}

static int jpc_rgn_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_rgn_t *rgn = &ms->parms.rgn;
    if (cstate->numcomps <= 256) {
        if (jpc_putuint8(out, rgn->compno)) {
            return -1;
        }
    } else {
        if (jpc_putuint16(out, rgn->compno)) {
            return -1;
        }
    }
    if (jpc_putuint8(out, rgn->roisty) ||
      jpc_putuint8(out, rgn->roishift)) {
        return -1;
    }
    return 0;
}

static int jpc_rgn_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_rgn_t *rgn = &ms->parms.rgn;
    fprintf(out, "compno = %d; roisty = %d; roishift = %d\n",
      (int)rgn->compno, rgn->roisty, rgn->roishift);
    return 0;
}

/******************************************************************************\
* QCD marker segment operations.
\******************************************************************************/

static void jpc_qcd_destroyparms(jpc_ms_t *ms)
{
    jpc_qcd_t *qcd = &ms->parms.qcd;
    jpc_qcx_destroycompparms(&qcd->compparms);
}

static int jpc_qcd_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_qcxcp_t *compparms = &ms->parms.qcd.compparms;
    return jpc_qcx_getcompparms(compparms, cstate, in, ms->len);
}

static int jpc_qcd_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_qcxcp_t *compparms = &ms->parms.qcd.compparms;
    return jpc_qcx_putcompparms(compparms, cstate, out);
}

static int jpc_qcd_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_qcd_t *qcd = &ms->parms.qcd;
    int i;
    fprintf(out, "qntsty = %d; numguard = %d; numstepsizes = %d\n",
      (int) qcd->compparms.qntsty, qcd->compparms.numguard, qcd->compparms.numstepsizes);
    for (i = 0; i < qcd->compparms.numstepsizes; ++i) {
        fprintf(out, "expn[%d] = 0x%04x; mant[%d] = 0x%04x;\n",
          i, (unsigned) JPC_QCX_GETEXPN(qcd->compparms.stepsizes[i]),
          i, (unsigned) JPC_QCX_GETMANT(qcd->compparms.stepsizes[i]));
    }
    return 0;
}

/******************************************************************************\
* QCC marker segment operations.
\******************************************************************************/

static void jpc_qcc_destroyparms(jpc_ms_t *ms)
{
    jpc_qcc_t *qcc = &ms->parms.qcc;
    jpc_qcx_destroycompparms(&qcc->compparms);
}

static int jpc_qcc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_qcc_t *qcc = &ms->parms.qcc;
    uint_fast8_t tmp;
    int len;
    len = ms->len;
    if (cstate->numcomps <= 256) {
        jpc_getuint8(in, &tmp);
        qcc->compno = tmp;
        --len;
    } else {
        jpc_getuint16(in, &qcc->compno);
        len -= 2;
    }
    if (jpc_qcx_getcompparms(&qcc->compparms, cstate, in, len)) {
        return -1;
    }
    if (jas_stream_eof(in)) {
        jpc_qcc_destroyparms(ms);
        return -1;
    }
    return 0;
}

static int jpc_qcc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_qcc_t *qcc = &ms->parms.qcc;
    if (cstate->numcomps <= 256) {
        jpc_putuint8(out, qcc->compno);
    } else {
        jpc_putuint16(out, qcc->compno);
    }
    if (jpc_qcx_putcompparms(&qcc->compparms, cstate, out)) {
        return -1;
    }
    return 0;
}

static int jpc_qcc_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_qcc_t *qcc = &ms->parms.qcc;
    int i;
    fprintf(out, "compno = %d; qntsty = %d; numguard = %d; "
      "numstepsizes = %d\n", (int)qcc->compno, qcc->compparms.qntsty, qcc->compparms.numguard,
      qcc->compparms.numstepsizes);
    for (i = 0; i < qcc->compparms.numstepsizes; ++i) {
        fprintf(out, "expn[%d] = 0x%04x; mant[%d] = 0x%04x;\n",
          i, (unsigned) JPC_QCX_GETEXPN(qcc->compparms.stepsizes[i]),
          i, (unsigned) JPC_QCX_GETMANT(qcc->compparms.stepsizes[i]));
    }
    return 0;
}

/******************************************************************************\
* QCD/QCC marker segment helper functions.
\******************************************************************************/

static void jpc_qcx_destroycompparms(jpc_qcxcp_t *compparms)
{
    if (compparms->stepsizes) {
        jas_free(compparms->stepsizes);
    }
}

static int jpc_qcx_getcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *in, uint_fast16_t len)
{
    uint_fast8_t tmp;
    int n;
    int i;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    n = 0;
    jpc_getuint8(in, &tmp);
    ++n;
    compparms->qntsty = tmp & 0x1f;
    compparms->numguard = (tmp >> 5) & 7;
    switch (compparms->qntsty) {
    case JPC_QCX_SIQNT:
        compparms->numstepsizes = 1;
        break;
    case JPC_QCX_NOQNT:
        compparms->numstepsizes = (len - n);
        break;
    case JPC_QCX_SEQNT:
        /* XXX - this is a hack */
        compparms->numstepsizes = (len - n) / 2;
        break;
    }
    if (compparms->numstepsizes > 3 * JPC_MAXRLVLS + 1) {
        jpc_qcx_destroycompparms(compparms);
                return -1;
        } else if (compparms->numstepsizes > 0) {
        compparms->stepsizes = jas_malloc(compparms->numstepsizes *
          sizeof(uint_fast16_t));
        assert(compparms->stepsizes);
        for (i = 0; i < compparms->numstepsizes; ++i) {
            if (compparms->qntsty == JPC_QCX_NOQNT) {
                jpc_getuint8(in, &tmp);
                compparms->stepsizes[i] = JPC_QCX_EXPN(tmp >> 3);
            } else {
                jpc_getuint16(in, &compparms->stepsizes[i]);
            }
        }
    } else {
        compparms->stepsizes = 0;
    }
    if (jas_stream_error(in) || jas_stream_eof(in)) {
        jpc_qcx_destroycompparms(compparms);
        return -1;
    }
    return 0;
}

static int jpc_qcx_putcompparms(jpc_qcxcp_t *compparms, jpc_cstate_t *cstate,
  jas_stream_t *out)
{
    int i;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    jpc_putuint8(out, ((compparms->numguard & 7) << 5) | compparms->qntsty);
    for (i = 0; i < compparms->numstepsizes; ++i) {
        if (compparms->qntsty == JPC_QCX_NOQNT) {
            jpc_putuint8(out, JPC_QCX_GETEXPN(
              compparms->stepsizes[i]) << 3);
        } else {
            jpc_putuint16(out, compparms->stepsizes[i]);
        }
    }
    return 0;
}

/******************************************************************************\
* SOP marker segment operations.
\******************************************************************************/

static int jpc_sop_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_sop_t *sop = &ms->parms.sop;

    /* Eliminate compiler warning about unused variable. */
    cstate = 0;

    if (jpc_getuint16(in, &sop->seqno)) {
        return -1;
    }
    return 0;
}

static int jpc_sop_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_sop_t *sop = &ms->parms.sop;

    /* Eliminate compiler warning about unused variable. */
    cstate = 0;

    if (jpc_putuint16(out, sop->seqno)) {
        return -1;
    }
    return 0;
}

static int jpc_sop_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_sop_t *sop = &ms->parms.sop;
    fprintf(out, "seqno = %d;\n", (int)sop->seqno);
    return 0;
}

/******************************************************************************\
* PPM marker segment operations.
\******************************************************************************/

static void jpc_ppm_destroyparms(jpc_ms_t *ms)
{
    jpc_ppm_t *ppm = &ms->parms.ppm;
    if (ppm->data) {
        jas_free(ppm->data);
    }
}

static int jpc_ppm_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_ppm_t *ppm = &ms->parms.ppm;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    ppm->data = 0;

    if (ms->len < 1) {
        goto error;
    }
    if (jpc_getuint8(in, &ppm->ind)) {
        goto error;
    }

    ppm->len = ms->len - 1;
    if (ppm->len > 0) {
        if (!(ppm->data = jas_malloc(ppm->len))) {
            goto error;
        }
        if (JAS_CAST(uint, jas_stream_read(in, ppm->data, ppm->len)) != ppm->len) {
            goto error;
        }
    } else {
        ppm->data = 0;
    }
    return 0;

error:
    jpc_ppm_destroyparms(ms);
    return -1;
}

static int jpc_ppm_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_ppm_t *ppm = &ms->parms.ppm;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    if (JAS_CAST(uint, jas_stream_write(out, (char *) ppm->data, ppm->len)) != ppm->len) {
        return -1;
    }
    return 0;
}

static int jpc_ppm_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_ppm_t *ppm = &ms->parms.ppm;
    fprintf(out, "ind=%d; len = %d;\n", ppm->ind, (int)ppm->len);
    if (ppm->len > 0) {
        fprintf(out, "data =\n");
        jas_memdump(out, ppm->data, ppm->len);
    }
    return 0;
}

/******************************************************************************\
* PPT marker segment operations.
\******************************************************************************/

static void jpc_ppt_destroyparms(jpc_ms_t *ms)
{
    jpc_ppt_t *ppt = &ms->parms.ppt;
    if (ppt->data) {
        jas_free(ppt->data);
    }
}

static int jpc_ppt_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_ppt_t *ppt = &ms->parms.ppt;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    ppt->data = 0;

    if (ms->len < 1) {
        goto error;
    }
    if (jpc_getuint8(in, &ppt->ind)) {
        goto error;
    }
    ppt->len = ms->len - 1;
    if (ppt->len > 0) {
        if (!(ppt->data = jas_malloc(ppt->len))) {
            goto error;
        }
        if (jas_stream_read(in, (char *) ppt->data, ppt->len) != JAS_CAST(int, ppt->len)) {
            goto error;
        }
    } else {
        ppt->data = 0;
    }
    return 0;

error:
    jpc_ppt_destroyparms(ms);
    return -1;
}

static int jpc_ppt_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_ppt_t *ppt = &ms->parms.ppt;

    /* Eliminate compiler warning about unused variable. */
    cstate = 0;

    if (jpc_putuint8(out, ppt->ind)) {
        return -1;
    }
    if (jas_stream_write(out, (char *) ppt->data, ppt->len) != JAS_CAST(int, ppt->len)) {
        return -1;
    }
    return 0;
}

static int jpc_ppt_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_ppt_t *ppt = &ms->parms.ppt;
    fprintf(out, "ind=%d; len = %d;\n", ppt->ind, (int)ppt->len);
    if (ppt->len > 0) {
        fprintf(out, "data =\n");
        jas_memdump(out, ppt->data, ppt->len);
    }
    return 0;
}

/******************************************************************************\
* POC marker segment operations.
\******************************************************************************/

static void jpc_poc_destroyparms(jpc_ms_t *ms)
{
    jpc_poc_t *poc = &ms->parms.poc;
    if (poc->pchgs) {
        jas_free(poc->pchgs);
    }
}

static int jpc_poc_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_poc_t *poc = &ms->parms.poc;
    jpc_pocpchg_t *pchg;
    int pchgno;
    uint_fast8_t tmp;
    poc->numpchgs = (cstate->numcomps > 256) ? (ms->len / 9) :
      (ms->len / 7);
    if (!(poc->pchgs = jas_alloc2(poc->numpchgs, sizeof(jpc_pocpchg_t)))) {
        goto error;
    }
    for (pchgno = 0, pchg = poc->pchgs; pchgno < poc->numpchgs; ++pchgno,
      ++pchg) {
        if (jpc_getuint8(in, &pchg->rlvlnostart)) {
            goto error;
        }
        if (cstate->numcomps > 256) {
            if (jpc_getuint16(in, &pchg->compnostart)) {
                goto error;
            }
        } else {
            if (jpc_getuint8(in, &tmp)) {
                goto error;
            };
            pchg->compnostart = tmp;
        }
        if (jpc_getuint16(in, &pchg->lyrnoend) ||
          jpc_getuint8(in, &pchg->rlvlnoend)) {
            goto error;
        }
        if (cstate->numcomps > 256) {
            if (jpc_getuint16(in, &pchg->compnoend)) {
                goto error;
            }
        } else {
            if (jpc_getuint8(in, &tmp)) {
                goto error;
            }
            pchg->compnoend = tmp;
        }
        if (jpc_getuint8(in, &pchg->prgord)) {
            goto error;
        }
        if (pchg->rlvlnostart > pchg->rlvlnoend ||
          pchg->compnostart > pchg->compnoend) {
            goto error;
        }
    }
    return 0;

error:
    jpc_poc_destroyparms(ms);
    return -1;
}

static int jpc_poc_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_poc_t *poc = &ms->parms.poc;
    jpc_pocpchg_t *pchg;
    int pchgno;
    for (pchgno = 0, pchg = poc->pchgs; pchgno < poc->numpchgs; ++pchgno,
      ++pchg) {
        if (jpc_putuint8(out, pchg->rlvlnostart) ||
          ((cstate->numcomps > 256) ?
          jpc_putuint16(out, pchg->compnostart) :
          jpc_putuint8(out, pchg->compnostart)) ||
          jpc_putuint16(out, pchg->lyrnoend) ||
          jpc_putuint8(out, pchg->rlvlnoend) ||
          ((cstate->numcomps > 256) ?
          jpc_putuint16(out, pchg->compnoend) :
          jpc_putuint8(out, pchg->compnoend)) ||
          jpc_putuint8(out, pchg->prgord)) {
            return -1;
        }
    }
    return 0;
}

static int jpc_poc_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_poc_t *poc = &ms->parms.poc;
    jpc_pocpchg_t *pchg;
    int pchgno;
    for (pchgno = 0, pchg = poc->pchgs; pchgno < poc->numpchgs;
      ++pchgno, ++pchg) {
        fprintf(out, "po[%d] = %d; ", pchgno, pchg->prgord);
        fprintf(out, "cs[%d] = %d; ce[%d] = %d; ",
          pchgno, (int)pchg->compnostart, pchgno, (int)pchg->compnoend);
        fprintf(out, "rs[%d] = %d; re[%d] = %d; ",
          pchgno, pchg->rlvlnostart, pchgno, pchg->rlvlnoend);
        fprintf(out, "le[%d] = %d\n", pchgno, (int)pchg->lyrnoend);
    }
    return 0;
}

/******************************************************************************\
* CRG marker segment operations.
\******************************************************************************/

static void jpc_crg_destroyparms(jpc_ms_t *ms)
{
    jpc_crg_t *crg = &ms->parms.crg;
    if (crg->comps) {
        jas_free(crg->comps);
    }
}

static int jpc_crg_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_crg_t *crg = &ms->parms.crg;
    jpc_crgcomp_t *comp;
    uint_fast16_t compno;
    crg->numcomps = cstate->numcomps;
    if (!(crg->comps = jas_alloc2(cstate->numcomps, sizeof(jpc_crgcomp_t)))) {
        return -1;
    }
    for (compno = 0, comp = crg->comps; compno < cstate->numcomps;
      ++compno, ++comp) {
        if (jpc_getuint16(in, &comp->hoff) ||
          jpc_getuint16(in, &comp->voff)) {
            jpc_crg_destroyparms(ms);
            return -1;
        }
    }
    return 0;
}

static int jpc_crg_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_crg_t *crg = &ms->parms.crg;
    int compno;
    jpc_crgcomp_t *comp;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    for (compno = 0, comp = crg->comps; compno < crg->numcomps; ++compno,
      ++comp) {
        if (jpc_putuint16(out, comp->hoff) ||
          jpc_putuint16(out, comp->voff)) {
            return -1;
        }
    }
    return 0;
}

static int jpc_crg_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_crg_t *crg = &ms->parms.crg;
    int compno;
    jpc_crgcomp_t *comp;
    for (compno = 0, comp = crg->comps; compno < crg->numcomps; ++compno,
      ++comp) {
        fprintf(out, "hoff[%d] = %d; voff[%d] = %d\n", compno,
          (int)comp->hoff, compno, (int)comp->voff);
    }
    return 0;
}

/******************************************************************************\
* Operations for COM marker segment.
\******************************************************************************/

static void jpc_com_destroyparms(jpc_ms_t *ms)
{
    jpc_com_t *com = &ms->parms.com;
    if (com->data) {
        jas_free(com->data);
    }
}

static int jpc_com_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_com_t *com = &ms->parms.com;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    if (jpc_getuint16(in, &com->regid)) {
        return -1;
    }
    com->len = ms->len - 2;
    if (com->len > 0) {
        if (!(com->data = jas_malloc(com->len))) {
            return -1;
        }
        if (jas_stream_read(in, com->data, com->len) != JAS_CAST(int, com->len)) {
            return -1;
        }
    } else {
        com->data = 0;
    }
    return 0;
}

static int jpc_com_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    jpc_com_t *com = &ms->parms.com;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    if (jpc_putuint16(out, com->regid)) {
        return -1;
    }
    if (jas_stream_write(out, com->data, com->len) != JAS_CAST(int, com->len)) {
        return -1;
    }
    return 0;
}

static int jpc_com_dumpparms(jpc_ms_t *ms, FILE *out)
{
    jpc_com_t *com = &ms->parms.com;
    unsigned int i;
    int printable;
    fprintf(out, "regid = %d;\n", (int)com->regid);
    printable = 1;
    for (i = 0; i < com->len; ++i) {
        if (!isprint(com->data[i])) {
            printable = 0;
            break;
        }
    }
    if (printable) {
        fprintf(out, "data = ");
        fwrite(com->data, sizeof(char), com->len, out);
        fprintf(out, "\n");
    }
    return 0;
}

/******************************************************************************\
* Operations for unknown types of marker segments.
\******************************************************************************/

static void jpc_unk_destroyparms(jpc_ms_t *ms)
{
    jpc_unk_t *unk = &ms->parms.unk;
    if (unk->data) {
        jas_free(unk->data);
    }
}

static int jpc_unk_getparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *in)
{
    jpc_unk_t *unk = &ms->parms.unk;

    /* Eliminate compiler warning about unused variables. */
    cstate = 0;

    if (ms->len > 0) {
        if (!(unk->data = jas_malloc(ms->len))) {
            return -1;
        }
        if (jas_stream_read(in, (char *) unk->data, ms->len) != JAS_CAST(int, ms->len)) {
            jas_free(unk->data);
            return -1;
        }
        unk->len = ms->len;
    } else {
        unk->data = 0;
        unk->len = 0;
    }
    return 0;
}

static int jpc_unk_putparms(jpc_ms_t *ms, jpc_cstate_t *cstate, jas_stream_t *out)
{
    /* Eliminate compiler warning about unused variables. */
    cstate = 0;
    ms = 0;
    out = 0;

    /* If this function is called, we are trying to write an unsupported
      type of marker segment.  Return with an error indication.  */
    return -1;
}

static int jpc_unk_dumpparms(jpc_ms_t *ms, FILE *out)
{
    unsigned int i;
    jpc_unk_t *unk = &ms->parms.unk;
    for (i = 0; i < unk->len; ++i) {
        fprintf(out, "%02x ", unk->data[i]);
    }
    return 0;
}

/******************************************************************************\
* Primitive I/O operations.
\******************************************************************************/

int jpc_getuint8(jas_stream_t *in, uint_fast8_t *val)
{
    int c;
    if ((c = jas_stream_getc(in)) == EOF) {
        return -1;
    }
    if (val) {
        *val = c;
    }
    return 0;
}

int jpc_putuint8(jas_stream_t *out, uint_fast8_t val)
{
    if (jas_stream_putc(out, val & 0xff) == EOF) {
        return -1;
    }
    return 0;
}

int jpc_getuint16(jas_stream_t *in, uint_fast16_t *val)
{
    uint_fast16_t v;
    int c;
    if ((c = jas_stream_getc(in)) == EOF) {
        return -1;
    }
    v = c;
    if ((c = jas_stream_getc(in)) == EOF) {
        return -1;
    }
    v = (v << 8) | c;
    if (val) {
        *val = v;
    }
    return 0;
}

int jpc_putuint16(jas_stream_t *out, uint_fast16_t val)
{
    if (jas_stream_putc(out, (val >> 8) & 0xff) == EOF ||
      jas_stream_putc(out, val & 0xff) == EOF) {
        return -1;
    }
    return 0;
}

int jpc_getuint32(jas_stream_t *in, uint_fast32_t *val)
{
    uint_fast32_t v;
    int c;
    if ((c = jas_stream_getc(in)) == EOF) {
        return -1;
    }
    v = c;
    if ((c = jas_stream_getc(in)) == EOF) {
        return -1;
    }
    v = (v << 8) | c;
    if ((c = jas_stream_getc(in)) == EOF) {
        return -1;
    }
    v = (v << 8) | c;
    if ((c = jas_stream_getc(in)) == EOF) {
        return -1;
    }
    v = (v << 8) | c;
    if (val) {
        *val = v;
    }
    return 0;
}

int jpc_putuint32(jas_stream_t *out, uint_fast32_t val)
{
    if (jas_stream_putc(out, (val >> 24) & 0xff) == EOF ||
      jas_stream_putc(out, (val >> 16) & 0xff) == EOF ||
      jas_stream_putc(out, (val >> 8) & 0xff) == EOF ||
      jas_stream_putc(out, val & 0xff) == EOF) {
        return -1;
    }
    return 0;
}

/******************************************************************************\
* Miscellany
\******************************************************************************/

static jpc_mstabent_t *jpc_mstab_lookup(int id)
{
    jpc_mstabent_t *mstabent;
    for (mstabent = jpc_mstab;; ++mstabent) {
        if (mstabent->id == id || mstabent->id < 0) {
            return mstabent;
        }
    }
    assert(0);
    return 0;
}

int jpc_validate(jas_stream_t *in)
{
    int n;
    int i;
    unsigned char buf[2];

    assert(JAS_STREAM_MAXPUTBACK >= 2);

    if ((n = jas_stream_read(in, (char *) buf, 2)) < 0) {
        return -1;
    }
    for (i = n - 1; i >= 0; --i) {
        if (jas_stream_ungetc(in, buf[i]) == EOF) {
            return -1;
        }
    }
    if (n < 2) {
        return -1;
    }
    if (buf[0] == (JPC_MS_SOC >> 8) && buf[1] == (JPC_MS_SOC & 0xff)) {
        return 0;
    }
    return -1;
}

int jpc_getdata(jas_stream_t *in, jas_stream_t *out, long len)
{
    return jas_stream_copy(out, in, len);
}

int jpc_putdata(jas_stream_t *out, jas_stream_t *in, long len)
{
    return jas_stream_copy(out, in, len);
}