generic-library/openjpeg
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Changed the way the image structure is allocated when the decoding parameters include some resolutions to discard. This should have a significant impact for the decoding of huge images when some resolutions are discarder (-r parameter)

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Warning: The output image size is now reduced when discarding resolutions !
This commit is contained in:
Francois-Olivier Devaux
2007-10-12 15:04:34 +00:00
parent ab0473aa42
commit 1f11a4fe90
5 changed files with 123 additions and 118 deletions
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18
libopenjpeg/tcd.c
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@@ -637,10 +637,10 @@ void tcd_malloc_decode(opj_tcd_t *tcd, opj_image_t * image, opj_cp_t * cp) {
x1 = j == 0 ? tilec->x1 : int_max(x1, (unsigned int) tilec->x1);
y1 = j == 0 ? tilec->y1 : int_max(y1, (unsigned int) tilec->y1);
}
w = x1 - x0;
h = y1 - y0;
w = int_ceildivpow2(x1 - x0, image->comps[i].factor);
h = int_ceildivpow2(y1 - y0, image->comps[i].factor);
image->comps[i].data = (int *) opj_malloc(w * h * sizeof(int));
image->comps[i].w = w;
image->comps[i].h = h;
@@ -651,7 +651,6 @@ void tcd_malloc_decode(opj_tcd_t *tcd, opj_image_t * image, opj_cp_t * cp) {
void tcd_malloc_decode_tile(opj_tcd_t *tcd, opj_image_t * image, opj_cp_t * cp, int tileno, opj_codestream_info_t *cstr_info) {
int compno, resno, bandno, precno, cblkno;
unsigned int x0 = 0, y0 = 0, x1 = 0, y1 = 0;
opj_tcp_t *tcp;
opj_tcd_tile_t *tile;
@@ -1363,6 +1362,11 @@ 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) {
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");
return false;
}
}
if (tcd->tcp->tccps[compno].qmfbid == 1) {
@@ -1371,9 +1375,6 @@ bool tcd_decode_tile(opj_tcd_t *tcd, unsigned char *src, int len, int tileno, op
dwt_decode_real(tilec, tilec->numresolutions - 1 - tcd->image->comps[compno].resno_decoded);
}
if (tile->comps[compno].numresolutions > 0) {
tcd->image->comps[compno].factor = tile->comps[compno].numresolutions - (tcd->image->comps[compno].resno_decoded + 1);
}
}
dwt_time = opj_clock() - dwt_time;
opj_event_msg(tcd->cinfo, EVT_INFO, "- dwt took %f s\n", dwt_time);
@@ -1389,6 +1390,7 @@ bool tcd_decode_tile(opj_tcd_t *tcd, unsigned char *src, int len, int tileno, op
(tile->comps[0].x1 - tile->comps[0].x0) * (tile->comps[0].y1 - tile->comps[0].y0));
}
}
/*---------------TILE-------------------*/