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At lines 577, 692 and 699, zeroing of effective region of code-block rather than the 1024*1024 allocated integers of code-block. This optimization has been proposed by Dmitry Kolyadin. Thanks for your help !

This commit is contained in:
Francois-Olivier Devaux 2005-06-02 15:28:37 +00:00
parent 7ae6a670fa
commit 32ba9920db
1 changed files with 21 additions and 8 deletions
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29
libopenjpeg/t1.c
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@ -37,7 +37,6 @@
#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <memory.h>
#define T1_MAXCBLKW 1024
#define T1_MAXCBLKH 1024
@ -574,7 +573,11 @@ void t1_encode_cblk(tcd_cblk_t * cblk, int orient, int compno, int level, int qm
cblk->numbps = max ? (int_floorlog2(max) + 1) - T1_NMSEDEC_FRACBITS : 0;
memset(t1_flags,0,sizeof(t1_flags));
/* Changed by Dmitry Kolyadin */
for (i = 0; i <= w; i++)
for (j = 0; j <= h; j++){
t1_flags[j][i] = 0;
}
bpno = cblk->numbps - 1;
passtype = 2;
@ -678,16 +681,28 @@ void t1_encode_cblk(tcd_cblk_t * cblk, int orient, int compno, int level, int qm
void t1_decode_cblk(tcd_cblk_t * cblk, int orient, int roishift,
int cblksty)
{
int w, h;
int i, j, w, h;
int bpno, passtype;
int segno, passno;
char type = T1_TYPE_MQ; //BYPASS mode
memset(t1_data,0,sizeof(t1_data));
memset(t1_flags,0,sizeof(t1_flags));
w = cblk->x1 - cblk->x0;
h = cblk->y1 - cblk->y0;
/* Changed by Dmitry Kolyadin */
for (j = 0; j <= h; j++){
for (i = 0; i <= w; i++) {
t1_flags[j][i] = 0;
}
}
/* Changed by Dmitry Kolyadin */
for (i = 0; i < w; i++) {
for (j = 0; j < h; j++){
t1_data[j][i] = 0;
}
}
bpno = roishift + cblk->numbps - 1;
passtype = 2;
@ -709,8 +724,6 @@ void t1_decode_cblk(tcd_cblk_t * cblk, int orient, int roishift,
mqc_init_dec(seg->data, seg->len);
// ddA
if (bpno==0) cblk->lastbp=1; // Add Antonin : quantizbug1
for (passno = 0; passno < seg->numpasses; passno++) {