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Fixed the maximum number of resolutions a user can discard while decoding. 

Added an error state in J2K_STATE (j2k.c)
This commit is contained in:
Francois-Olivier Devaux 2007-11-27 14:00:45 +00:00
parent efa5f7977c
commit 9e5d165e79
4 changed files with 26 additions and 7 deletions
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2
ChangeLog
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@ -9,6 +9,8 @@ November 14, 2007
+ [FOD] Created the file index.c in the codec directory. This file handles the creation of index files,
at encoding and decoding.
* [FOD] Fixed bugs during the creation of the index (PCRL progression order)
* [FOD] Fixed the maximum number of resolutions a user can discard while decoding.
Added an error state in J2K_STATE (j2k.c)
November 14, 2007
! [FOD] - First Patch by Callum Lerwick. Instead of reinventing realloc, j2k_read_sod now just uses opj_realloc in j2k.c

24
libopenjpeg/j2k.c
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@ -750,8 +750,13 @@ static void j2k_read_cox(opj_j2k_t *j2k, int compno) {
tccp->numresolutions = cio_read(cio, 1) + 1; /* SPcox (D) */
/* check the reduce value */
cp->reduce = int_min((tccp->numresolutions)-1, cp->reduce);
// If user wants to remove more resolutions than the codestream contains, return error
if (cp->reduce >= tccp->numresolutions) {
opj_event_msg(j2k->cinfo, EVT_ERROR, "Error decoding component %d.\nThe number of resolutions to remove is higher than the number "
"of resolutions of this component\nModify the cp_reduce parameter.\n\n", compno);
j2k->state |= J2K_STATE_ERR;
}
tccp->cblkw = cio_read(cio, 1) + 2; /* SPcox (E) */
tccp->cblkh = cio_read(cio, 1) + 2; /* SPcox (F) */
tccp->cblksty = cio_read(cio, 1); /* SPcox (G) */
@ -1586,6 +1591,7 @@ static void j2k_write_eoc(opj_j2k_t *j2k) {
static void j2k_read_eoc(opj_j2k_t *j2k) {
int i, tileno;
bool success;
/* if packets should be decoded */
if (j2k->cp->limit_decoding != DECODE_ALL_BUT_PACKETS) {
@ -1594,10 +1600,14 @@ static void j2k_read_eoc(opj_j2k_t *j2k) {
for (i = 0; i < j2k->cp->tileno_size; i++) {
tcd_malloc_decode_tile(tcd, j2k->image, j2k->cp, i, j2k->cstr_info);
tileno = j2k->cp->tileno[i];
tcd_decode_tile(tcd, j2k->tile_data[tileno], j2k->tile_len[tileno], tileno, j2k->cstr_info);
success = tcd_decode_tile(tcd, j2k->tile_data[tileno], j2k->tile_len[tileno], tileno, j2k->cstr_info);
opj_free(j2k->tile_data[tileno]);
j2k->tile_data[tileno] = NULL;
tcd_free_decode_tile(tcd, i);
if (success == false) {
j2k->state |= J2K_STATE_ERR;
break;
}
}
tcd_free_decode(tcd);
tcd_destroy(tcd);
@ -1610,7 +1620,10 @@ static void j2k_read_eoc(opj_j2k_t *j2k) {
j2k->tile_data[tileno] = NULL;
}
}
j2k->state = J2K_STATE_MT;
if (j2k->state & J2K_STATE_ERR)
j2k->state = J2K_STATE_MT + J2K_STATE_ERR;
else
j2k->state = J2K_STATE_MT;
}
typedef struct opj_dec_mstabent {
@ -1900,6 +1913,9 @@ opj_image_t* j2k_decode(opj_j2k_t *j2k, opj_cio_t *cio, opj_codestream_info_t *c
if (e->handler) {
(*e->handler)(j2k);
}
if (j2k->state & J2K_STATE_ERR)
return NULL;
if (j2k->state == J2K_STATE_MT) {
break;
}

3
libopenjpeg/j2k.h
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@ -104,7 +104,8 @@ typedef enum J2K_STATUS {
J2K_STATE_TPHSOT = 0x0008, /**< the decoding process is in a tile part header and expects a SOT marker */
J2K_STATE_TPH = 0x0010, /**< the decoding process is in a tile part header */
J2K_STATE_MT = 0x0020, /**< the EOC marker has just been read */
J2K_STATE_NEOC = 0x0040 /**< the decoding process must not expect a EOC marker because the codestream is truncated */
J2K_STATE_NEOC = 0x0040, /**< the decoding process must not expect a EOC marker because the codestream is truncated */
J2K_STATE_ERR = 0x0080 /**< the decoding process has encountered an error */
} J2K_STATUS;
/* ----------------------------------------------------------------------- */

4
libopenjpeg/tcd.c
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@ -1384,9 +1384,9 @@ bool tcd_decode_tile(opj_tcd_t *tcd, unsigned char *src, int len, int tileno, op
if (tcd->cp->reduce != 0) {
tcd->image->comps[compno].resno_decoded =
tile->comps[compno].numresolutions - tcd->cp->reduce - 1;
if (tcd->image->comps[compno].resno_decoded < 1) {
if (tcd->image->comps[compno].resno_decoded < 0) {
opj_event_msg(tcd->cinfo, EVT_ERROR, "Error decoding tile. The number of resolutions to remove is higher than the number "
" of resolutions in the original codestream\nModify the cp_reduce parameter.\n");
"of resolutions in the original codestream\nModify the cp_reduce parameter.\n");
return false;
}
}