ref: 7cdf839293bf3c0b5c3f52d368635156530ddf85
dir: /jp2_cod.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__
*/
/*
* JP2 Library
*
* $Id$
*/
/******************************************************************************\
* Includes.
\******************************************************************************/
#include "jp2_cod.h"
#include "jasper/jas_malloc.h"
#include "jasper/jas_debug.h"
/******************************************************************************\
* Function prototypes.
\******************************************************************************/
#define ONES(n) ((1 << (n)) - 1)
static const jp2_boxinfo_t *jp2_boxinfolookup(int type);
static int jp2_getuint8(jas_stream_t *in, uint_fast8_t *val);
static int jp2_getuint16(jas_stream_t *in, uint_fast16_t *val);
static int jp2_getuint32(jas_stream_t *in, uint_fast32_t *val);
static int jp2_getuint64(jas_stream_t *in, uint_fast64_t *val);
static int jp2_putuint8(jas_stream_t *out, uint_fast8_t val);
static int jp2_putuint16(jas_stream_t *out, uint_fast16_t val);
static int jp2_putuint32(jas_stream_t *out, uint_fast32_t val);
static int jp2_putuint64(jas_stream_t *out, uint_fast64_t val);
static int jp2_getint(jas_stream_t *in, int s, int n, int_fast32_t *val);
static int jp2_jp_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_jp_putdata(const jp2_box_t *box, jas_stream_t *out);
static int jp2_ftyp_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_ftyp_putdata(const jp2_box_t *box, jas_stream_t *out);
static int jp2_ihdr_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_ihdr_putdata(const jp2_box_t *box, jas_stream_t *out);
static void jp2_bpcc_destroy(jp2_box_t *box);
static int jp2_bpcc_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_bpcc_putdata(const jp2_box_t *box, jas_stream_t *out);
static int jp2_colr_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_colr_putdata(const jp2_box_t *box, jas_stream_t *out);
static void jp2_colr_destroy(jp2_box_t *box);
static void jp2_cdef_destroy(jp2_box_t *box);
static int jp2_cdef_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_cdef_putdata(const jp2_box_t *box, jas_stream_t *out);
static void jp2_cmap_destroy(jp2_box_t *box);
static int jp2_cmap_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_cmap_putdata(const jp2_box_t *box, jas_stream_t *out);
static void jp2_pclr_destroy(jp2_box_t *box);
static int jp2_pclr_getdata(jp2_box_t *box, jas_stream_t *in);
static int jp2_pclr_putdata(const jp2_box_t *box, jas_stream_t *out);
/******************************************************************************\
* Local data.
\******************************************************************************/
static const jp2_boxinfo_t jp2_boxinfos[] = {
{JP2_BOX_JP, 0, "JP", {0, 0, jp2_jp_getdata, jp2_jp_putdata}},
{JP2_BOX_FTYP, 0, "FTYP", {0, 0, jp2_ftyp_getdata, jp2_ftyp_putdata}},
{JP2_BOX_JP2H, JP2_BOX_SUPER, "JP2H", {0, 0, 0, 0}},
{JP2_BOX_IHDR, 0, "IHDR", {0, 0, jp2_ihdr_getdata, jp2_ihdr_putdata}},
{JP2_BOX_BPCC, 0, "BPCC", {0, jp2_bpcc_destroy, jp2_bpcc_getdata, jp2_bpcc_putdata}},
{JP2_BOX_COLR, 0, "COLR", {0, jp2_colr_destroy, jp2_colr_getdata, jp2_colr_putdata}},
{JP2_BOX_PCLR, 0, "PCLR", {0, jp2_pclr_destroy, jp2_pclr_getdata, jp2_pclr_putdata}},
{JP2_BOX_CMAP, 0, "CMAP", {0, jp2_cmap_destroy, jp2_cmap_getdata, jp2_cmap_putdata}},
{JP2_BOX_CDEF, 0, "CDEF", {0, jp2_cdef_destroy, jp2_cdef_getdata, jp2_cdef_putdata}},
{JP2_BOX_RES, JP2_BOX_SUPER, "RES", {0, 0, 0, 0}},
{JP2_BOX_RESC, 0, "RESC", {0, 0, 0, 0}},
{JP2_BOX_RESD, 0, "RESD", {0, 0, 0, 0}},
{JP2_BOX_JP2C, JP2_BOX_NODATA, "JP2C", {0, 0, 0, 0}},
{JP2_BOX_JP2I, 0, "JP2I", {0, 0, 0, 0}},
{JP2_BOX_XML, 0, "XML", {0, 0, 0, 0}},
{JP2_BOX_UUID, 0, "UUID", {0, 0, 0, 0}},
{JP2_BOX_UINF, JP2_BOX_SUPER, "UINF", {0, 0, 0, 0}},
{JP2_BOX_ULST, 0, "ULST", {0, 0, 0, 0}},
{JP2_BOX_URL, 0, "URL", {0, 0, 0, 0}},
{0, 0, 0, {0, 0, 0, 0}},
};
static const jp2_boxinfo_t jp2_boxinfo_unk = {
0, 0, "Unknown", {0, 0, 0, 0}
};
/******************************************************************************\
* Box constructor.
\******************************************************************************/
static jp2_box_t *jp2_box_create0(void)
{
jp2_box_t *box;
if (!(box = jas_malloc(sizeof(jp2_box_t)))) {
return 0;
}
memset(box, 0, sizeof(jp2_box_t));
// Mark the box data as never having been constructed
// so that we will not errantly attempt to destroy it later.
box->ops = &jp2_boxinfo_unk.ops;
return box;
}
jp2_box_t *jp2_box_create(int type)
{
const jp2_boxinfo_t *boxinfo = jp2_boxinfolookup(type);
assert(boxinfo != NULL);
if (boxinfo == &jp2_boxinfo_unk) {
// on error, jp2_boxinfolookup() returns &jp2_boxinfo_unk
return NULL;
}
jp2_box_t *box;
if (!(box = jp2_box_create0())) {
return 0;
}
box->type = type;
box->len = 0;
box->info = boxinfo;
box->ops = &boxinfo->ops;
return box;
}
/******************************************************************************\
* Box destructor.
\******************************************************************************/
void jp2_box_destroy(jp2_box_t *box)
{
if (box->ops->destroy) {
(*box->ops->destroy)(box);
}
jas_free(box);
}
static void jp2_bpcc_destroy(jp2_box_t *box)
{
jp2_bpcc_t *bpcc = &box->data.bpcc;
if (bpcc->bpcs) {
jas_free(bpcc->bpcs);
bpcc->bpcs = 0;
}
}
static void jp2_cdef_destroy(jp2_box_t *box)
{
jp2_cdef_t *cdef = &box->data.cdef;
if (cdef->ents) {
jas_free(cdef->ents);
cdef->ents = 0;
}
}
/******************************************************************************\
* Box input.
\******************************************************************************/
jp2_box_t *jp2_box_get(jas_stream_t *in)
{
jp2_box_t *box;
const jp2_boxinfo_t *boxinfo;
jas_stream_t *tmpstream;
uint_fast32_t len;
uint_fast64_t extlen;
bool dataflag;
tmpstream = 0;
if (!(box = jp2_box_create0())) {
goto error;
}
if (jp2_getuint32(in, &len) || jp2_getuint32(in, &box->type)) {
goto error;
}
boxinfo = jp2_boxinfolookup(box->type);
box->info = boxinfo;
box->len = len;
JAS_DBGLOG(10, (
"preliminary processing of JP2 box: "
"type=%c%s%c (0x%08x); length=%"PRIuFAST32"\n",
'"', boxinfo->name, '"', box->type, box->len
));
size_t hdrlen;
if (box->len == 1) {
JAS_DBGLOG(10, ("big length\n"));
if (jp2_getuint64(in, &extlen)) {
goto error;
}
if (extlen > 0xffffffffUL) {
jas_eprintf("warning: cannot handle large 64-bit box length\n");
goto error;
}
box->len = extlen;
hdrlen = JP2_BOX_HDRLEN(true);
} else {
hdrlen = JP2_BOX_HDRLEN(false);
}
if (box->len != 0 && box->len < 8) {
goto error;
}
if (box->len > 0x7fffffffUL) {
/* this limit is the largest value which can
be passed to jas_stream_copy() without
overflowing */
goto error;
}
dataflag = !(box->info->flags & (JP2_BOX_SUPER | JP2_BOX_NODATA));
if (dataflag) {
if (box->len < hdrlen)
goto error;
box->datalen = box->len - hdrlen;
if (!(tmpstream = jas_stream_memopen(0, 0))) {
goto error;
}
if (jas_stream_copy(tmpstream, in, box->datalen)) {
jas_eprintf("cannot copy box data\n");
goto error;
}
jas_stream_rewind(tmpstream);
// From here onwards, the box data will need to be destroyed.
// So, initialize the box operations.
box->ops = &boxinfo->ops;
if (box->ops->getdata) {
if ((*box->ops->getdata)(box, tmpstream)) {
jas_eprintf("cannot parse box data\n");
goto error;
}
}
jas_stream_close(tmpstream);
}
return box;
error:
if (box) {
jp2_box_destroy(box);
}
if (tmpstream) {
jas_stream_close(tmpstream);
}
return 0;
}
static int jp2_jp_getdata(jp2_box_t *box, jas_stream_t *in)
{
jp2_jp_t *jp = &box->data.jp;
if (jp2_getuint32(in, &jp->magic)) {
return -1;
}
return 0;
}
static int jp2_ftyp_getdata(jp2_box_t *box, jas_stream_t *in)
{
if (box->datalen < 8)
return -1;
jp2_ftyp_t *ftyp = &box->data.ftyp;
unsigned int i;
if (jp2_getuint32(in, &ftyp->majver) || jp2_getuint32(in, &ftyp->minver)) {
return -1;
}
ftyp->numcompatcodes = (box->datalen - 8) / 4;
if (ftyp->numcompatcodes > JP2_FTYP_MAXCOMPATCODES) {
return -1;
}
for (i = 0; i < ftyp->numcompatcodes; ++i) {
if (jp2_getuint32(in, &ftyp->compatcodes[i])) {
return -1;
}
}
return 0;
}
static int jp2_ihdr_getdata(jp2_box_t *box, jas_stream_t *in)
{
jp2_ihdr_t *ihdr = &box->data.ihdr;
if (jp2_getuint32(in, &ihdr->height) || jp2_getuint32(in, &ihdr->width) ||
jp2_getuint16(in, &ihdr->numcmpts) || jp2_getuint8(in, &ihdr->bpc) ||
jp2_getuint8(in, &ihdr->comptype) || jp2_getuint8(in, &ihdr->csunk) ||
jp2_getuint8(in, &ihdr->ipr)) {
return -1;
}
return 0;
}
static int jp2_bpcc_getdata(jp2_box_t *box, jas_stream_t *in)
{
if (box->datalen > 0xffff)
/* excessive number of components - this is a
pessimistic limit, because in jp2_ihdr_getdata(),
it's a 16 bit integer */
return -1;
jp2_bpcc_t *bpcc = &box->data.bpcc;
unsigned int i;
bpcc->bpcs = 0;
bpcc->numcmpts = box->datalen;
if (!(bpcc->bpcs = jas_alloc2(bpcc->numcmpts, sizeof(uint_fast8_t)))) {
return -1;
}
for (i = 0; i < bpcc->numcmpts; ++i) {
if (jp2_getuint8(in, &bpcc->bpcs[i])) {
return -1;
}
}
return 0;
}
static int jp2_colr_getdata(jp2_box_t *box, jas_stream_t *in)
{
if (box->datalen < 3)
return -1;
jp2_colr_t *colr = &box->data.colr;
colr->csid = 0;
colr->iccp = 0;
colr->iccplen = 0;
if (jp2_getuint8(in, &colr->method) || jp2_getuint8(in, &colr->pri) ||
jp2_getuint8(in, &colr->approx)) {
return -1;
}
switch (colr->method) {
case JP2_COLR_ENUM:
if (jp2_getuint32(in, &colr->csid)) {
return -1;
}
break;
case JP2_COLR_ICC:
colr->iccplen = box->datalen - 3;
if (colr->iccplen > 1024 * 1024)
/* refuse to read ICC profiles larger than 1
MB (I have no idea how large ICC profiles
can get, but I believe this limit might be
very pessimistic and should be lowered
further) */
return -1;
if (!(colr->iccp = jas_alloc2(colr->iccplen, sizeof(uint_fast8_t)))) {
return -1;
}
if (jas_stream_read(in, colr->iccp, colr->iccplen) != colr->iccplen) {
return -1;
}
break;
}
return 0;
}
static void jp2_colr_destroy(jp2_box_t *box)
{
jp2_colr_t *colr = &box->data.colr;
if (colr->iccp) {
jas_free(colr->iccp);
}
}
static int jp2_cdef_getdata(jp2_box_t *box, jas_stream_t *in)
{
jp2_cdef_t *cdef = &box->data.cdef;
jp2_cdefchan_t *chan;
unsigned int channo;
cdef->ents = 0;
if (jp2_getuint16(in, &cdef->numchans)) {
return -1;
}
if (!(cdef->ents = jas_alloc2(cdef->numchans, sizeof(jp2_cdefchan_t)))) {
return -1;
}
for (channo = 0; channo < cdef->numchans; ++channo) {
chan = &cdef->ents[channo];
if (jp2_getuint16(in, &chan->channo) || jp2_getuint16(in, &chan->type) ||
jp2_getuint16(in, &chan->assoc)) {
return -1;
}
}
return 0;
}
/******************************************************************************\
* Box output.
\******************************************************************************/
int jp2_box_put(jp2_box_t *box, jas_stream_t *out)
{
jas_stream_t *tmpstream;
bool extlen;
bool dataflag;
tmpstream = 0;
dataflag = !(box->info->flags & (JP2_BOX_SUPER | JP2_BOX_NODATA));
if (dataflag) {
if (!(tmpstream = jas_stream_memopen(0, 0))) {
goto error;
}
if (box->ops->putdata) {
if ((*box->ops->putdata)(box, tmpstream)) {
goto error;
}
}
box->len = jas_stream_tell(tmpstream) + JP2_BOX_HDRLEN(false);
jas_stream_rewind(tmpstream);
}
extlen = (box->len >= (((uint_fast64_t)1) << 32)) != 0;
if (jp2_putuint32(out, extlen ? 1 : box->len)) {
goto error;
}
if (jp2_putuint32(out, box->type)) {
goto error;
}
if (extlen) {
if (jp2_putuint64(out, box->len)) {
goto error;
}
}
if (dataflag) {
if (jas_stream_copy(out, tmpstream, box->len -
JP2_BOX_HDRLEN(false))) {
jas_eprintf("cannot copy box data\n");
goto error;
}
jas_stream_close(tmpstream);
}
return 0;
error:
if (tmpstream) {
jas_stream_close(tmpstream);
}
return -1;
}
static int jp2_jp_putdata(const jp2_box_t *box, jas_stream_t *out)
{
const jp2_jp_t *jp = &box->data.jp;
if (jp2_putuint32(out, jp->magic)) {
return -1;
}
return 0;
}
static int jp2_ftyp_putdata(const jp2_box_t *box, jas_stream_t *out)
{
const jp2_ftyp_t *ftyp = &box->data.ftyp;
unsigned int i;
if (jp2_putuint32(out, ftyp->majver) || jp2_putuint32(out, ftyp->minver)) {
return -1;
}
for (i = 0; i < ftyp->numcompatcodes; ++i) {
if (jp2_putuint32(out, ftyp->compatcodes[i])) {
return -1;
}
}
return 0;
}
static int jp2_ihdr_putdata(const jp2_box_t *box, jas_stream_t *out)
{
const jp2_ihdr_t *ihdr = &box->data.ihdr;
if (jp2_putuint32(out, ihdr->height) || jp2_putuint32(out, ihdr->width) ||
jp2_putuint16(out, ihdr->numcmpts) || jp2_putuint8(out, ihdr->bpc) ||
jp2_putuint8(out, ihdr->comptype) || jp2_putuint8(out, ihdr->csunk) ||
jp2_putuint8(out, ihdr->ipr)) {
return -1;
}
return 0;
}
static int jp2_bpcc_putdata(const jp2_box_t *box, jas_stream_t *out)
{
const jp2_bpcc_t *bpcc = &box->data.bpcc;
unsigned int i;
for (i = 0; i < bpcc->numcmpts; ++i) {
if (jp2_putuint8(out, bpcc->bpcs[i])) {
return -1;
}
}
return 0;
}
static int jp2_colr_putdata(const jp2_box_t *box, jas_stream_t *out)
{
const jp2_colr_t *colr = &box->data.colr;
if (jp2_putuint8(out, colr->method) || jp2_putuint8(out, colr->pri) ||
jp2_putuint8(out, colr->approx)) {
return -1;
}
switch (colr->method) {
case JP2_COLR_ENUM:
if (jp2_putuint32(out, colr->csid)) {
return -1;
}
break;
case JP2_COLR_ICC:
if (jas_stream_write(out, colr->iccp, colr->iccplen) != colr->iccplen)
return -1;
break;
}
return 0;
}
static int jp2_cdef_putdata(const jp2_box_t *box, jas_stream_t *out)
{
const jp2_cdef_t *cdef = &box->data.cdef;
unsigned int i;
if (jp2_putuint16(out, cdef->numchans)) {
return -1;
}
for (i = 0; i < cdef->numchans; ++i) {
const jp2_cdefchan_t *ent = &cdef->ents[i];
if (jp2_putuint16(out, ent->channo) ||
jp2_putuint16(out, ent->type) ||
jp2_putuint16(out, ent->assoc)) {
return -1;
}
}
return 0;
}
/******************************************************************************\
* Input operations for primitive types.
\******************************************************************************/
static int jp2_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;
}
static int jp2_getuint16(jas_stream_t *in, uint_fast16_t *val)
{
jas_uchar buffer[2];
if (jas_stream_read(in, buffer, sizeof(buffer)) != sizeof(buffer))
return -1;
*val = (uint_fast16_t)buffer[0] << 8 | (uint_fast16_t)buffer[1];
return 0;
}
static int jp2_getuint32(jas_stream_t *in, uint_fast32_t *val)
{
jas_uchar buffer[4];
if (jas_stream_read(in, buffer, sizeof(buffer)) != sizeof(buffer))
return -1;
*val = (uint_fast32_t)buffer[0] << 24 | (uint_fast32_t)buffer[1] << 16
| (uint_fast32_t)buffer[2] << 8 | (uint_fast32_t)buffer[3];
return 0;
}
static int jp2_getuint64(jas_stream_t *in, uint_fast64_t *val)
{
uint_fast64_t tmpval;
int i;
int c;
tmpval = 0;
for (i = 0; i < 8; ++i) {
tmpval <<= 8;
if ((c = jas_stream_getc(in)) == EOF) {
return -1;
}
tmpval |= (c & 0xff);
}
*val = tmpval;
return 0;
}
/******************************************************************************\
* Output operations for primitive types.
\******************************************************************************/
static int jp2_putuint8(jas_stream_t *out, uint_fast8_t val)
{
if (jas_stream_putc(out, val & 0xff) == EOF) {
return -1;
}
return 0;
}
static int jp2_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;
}
static int jp2_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;
}
static int jp2_putuint64(jas_stream_t *out, uint_fast64_t val)
{
if (jp2_putuint32(out, (val >> 32) & 0xffffffffUL) ||
jp2_putuint32(out, val & 0xffffffffUL)) {
return -1;
}
return 0;
}
/******************************************************************************\
* Miscellaneous code.
\******************************************************************************/
static const jp2_boxinfo_t *jp2_boxinfolookup(int type)
{
const jp2_boxinfo_t *boxinfo;
for (boxinfo = jp2_boxinfos; boxinfo->name; ++boxinfo) {
if (boxinfo->type == type) {
return boxinfo;
}
}
return &jp2_boxinfo_unk;
}
static void jp2_cmap_destroy(jp2_box_t *box)
{
jp2_cmap_t *cmap = &box->data.cmap;
if (cmap->ents) {
jas_free(cmap->ents);
}
}
static int jp2_cmap_getdata(jp2_box_t *box, jas_stream_t *in)
{
jp2_cmap_t *cmap = &box->data.cmap;
jp2_cmapent_t *ent;
unsigned int i;
cmap->ents = 0;
cmap->numchans = (box->datalen) / 4;
if (cmap->numchans > 0xff)
/* excessive number of channels - this is a
pessimistic limit, because in jp2_pclr_getdata(),
it's a 8 bit integer */
return -1;
if (!(cmap->ents = jas_alloc2(cmap->numchans, sizeof(jp2_cmapent_t)))) {
return -1;
}
for (i = 0; i < cmap->numchans; ++i) {
ent = &cmap->ents[i];
if (jp2_getuint16(in, &ent->cmptno) ||
jp2_getuint8(in, &ent->map) ||
jp2_getuint8(in, &ent->pcol)) {
return -1;
}
}
return 0;
}
static int jp2_cmap_putdata(const jp2_box_t *box, jas_stream_t *out)
{
/* Eliminate compiler warning about unused variables. */
USED(box);
USED(out);
return -1;
}
static void jp2_pclr_destroy(jp2_box_t *box)
{
jp2_pclr_t *pclr = &box->data.pclr;
if (pclr->lutdata) {
jas_free(pclr->lutdata);
}
if (pclr->bpc)
jas_free(pclr->bpc);
}
static int jp2_pclr_getdata(jp2_box_t *box, jas_stream_t *in)
{
jp2_pclr_t *pclr = &box->data.pclr;
int lutsize;
unsigned int i;
unsigned int j;
int_fast32_t x;
pclr->lutdata = 0;
pclr->bpc = 0;
if (jp2_getuint16(in, &pclr->numlutents) ||
jp2_getuint8(in, &pclr->numchans)) {
return -1;
}
// verify in range data as per I.5.3.4 - Palette box
if (pclr->numchans < 1 || pclr->numlutents < 1 || pclr->numlutents > 1024) {
return -1;
}
lutsize = pclr->numlutents * pclr->numchans;
if (!(pclr->lutdata = jas_alloc2(lutsize, sizeof(int_fast32_t)))) {
return -1;
}
if (!(pclr->bpc = jas_alloc2(pclr->numchans, sizeof(uint_fast8_t)))) {
return -1;
}
for (i = 0; i < pclr->numchans; ++i) {
if (jp2_getuint8(in, &pclr->bpc[i])) {
return -1;
}
}
for (i = 0; i < pclr->numlutents; ++i) {
for (j = 0; j < pclr->numchans; ++j) {
if (jp2_getint(in, (pclr->bpc[j] & 0x80) != 0,
(pclr->bpc[j] & 0x7f) + 1, &x)) {
return -1;
}
pclr->lutdata[i * pclr->numchans + j] = x;
}
}
return 0;
}
static int jp2_pclr_putdata(const jp2_box_t *box, jas_stream_t *out)
{
#if 0
const jp2_pclr_t *pclr = &box->data.pclr;
#endif
/* Eliminate warning about unused variable. */
USED(box);
USED(out);
return -1;
}
static int jp2_getint(jas_stream_t *in, int s, int n, int_fast32_t *val)
{
int c;
int i;
uint_fast32_t v;
int m;
m = (n + 7) / 8;
v = 0;
for (i = 0; i < m; ++i) {
if ((c = jas_stream_getc(in)) == EOF) {
return -1;
}
v = (v << 8) | c;
}
v &= ONES(n);
if (s) {
int sb;
sb = v & (1 << (8 * m - 1));
*val = ((~v) + 1) & ONES(8 * m);
if (sb) {
*val = -*val;
}
} else {
*val = v;
}
return 0;
}
const jp2_cdefchan_t *jp2_cdef_lookup(jp2_cdef_t *cdef, int channo)
{
unsigned int i;
jp2_cdefchan_t *cdefent;
for (i = 0; i < cdef->numchans; ++i) {
cdefent = &cdef->ents[i];
if (cdefent->channo == JAS_CAST(unsigned int, channo)) {
return cdefent;
}
}
return 0;
}