[trunk] As per T.809 code block are not shifted in JP3D

Table A.7 
3D code-block width, height and depth exponent values xcb = value, ycb = value
or zcb = value.
NOTE – This redefines Rec. ITU-T T.800 | ISO/IEC 15444-1 significantly! The 3D
code-block width, height and depth are limited to powers of two with the minimum
size being 20 and the maximum being 210.
Further, the 3D code-block size is restricted so that 4 ≤ xcb+ycb+zcb ≤ 18.

1 files changed, 16 insertions, 6 deletions

diff --git a/src/lib/openjp3d/jp3d.c b/src/lib/openjp3d/jp3d.c
index c21d7442..de4b2266 100755
--- a/src/lib/openjp3d/jp3d.c
+++ b/src/lib/openjp3d/jp3d.c
@@ -809,6 +809,7 @@ static void j3d_read_com(opj_j3d_t *j3d) {
 

 static void j3d_write_cox(opj_j3d_t *j3d, int compno) {

 	int i;

+  int shift = 2;

 

 	opj_cp_t *cp = j3d->cp;

 	opj_tcp_t *tcp = &cp->tcps[j3d->curtileno];

@@ -820,11 +821,15 @@ static void j3d_write_cox(opj_j3d_t *j3d, int compno) {
 		cio_write(cio, tccp->numresolution[1] - 1, 1);	/* SPcox (E) No of decomposition levels in y-axis*/

 		cio_write(cio, tccp->numresolution[2] - 1, 1);	/* SPcox (F) No of decomposition levels in z-axis*/

 	}

+	if (j3d->cinfo->codec_format == CODEC_J3D) {

+    /* Table A.7 */

+    shift = 0;

+  }

 	/* (cblkw - 2) + (cblkh - 2) + (cblkl - 2) <= 18*/

-	cio_write(cio, tccp->cblk[0] - 2, 1);				/* SPcox (G) Cblk width entre 10 y 2 (8 y 0)*/

-	cio_write(cio, tccp->cblk[1] - 2, 1);				/* SPcox (H) Cblk height*/

+	cio_write(cio, tccp->cblk[0] - shift, 1);				/* SPcox (G) Cblk width entre 10 y 2 (8 y 0)*/

+	cio_write(cio, tccp->cblk[1] - shift, 1);				/* SPcox (H) Cblk height*/

 	if (j3d->cinfo->codec_format == CODEC_J3D) {

-		cio_write(cio, tccp->cblk[2] - 2, 1);			/* SPcox (I) Cblk depth*/

+		cio_write(cio, tccp->cblk[2] - shift, 1);			/* SPcox (I) Cblk depth*/

 	}

 	cio_write(cio, tccp->cblksty, 1);				/* SPcox (J) Cblk style*/

 	cio_write(cio, tccp->dwtid[0], 1);				/* SPcox (K) WT in x-axis 15444-2 Table A10*/

@@ -847,6 +852,7 @@ static void j3d_write_cox(opj_j3d_t *j3d, int compno) {
 

 static void j3d_read_cox(opj_j3d_t *j3d, int compno) {

 	int i;

+  int shift = 2;

 

 	opj_cp_t *cp = j3d->cp;

 	opj_tcp_t *tcp = j3d->state == J3D_STATE_TPH ? &cp->tcps[j3d->curtileno] : j3d->default_tcp;

@@ -866,10 +872,14 @@ static void j3d_read_cox(opj_j3d_t *j3d, int compno) {
 	cp->reduce[1] = int_min((tccp->numresolution[1])-1, cp->reduce[1]);

 	cp->reduce[2] = int_min((tccp->numresolution[2])-1, cp->reduce[2]);

 	

-	tccp->cblk[0] = cio_read(cio, 1) + 2;	/* SPcox (G) */

-	tccp->cblk[1] = cio_read(cio, 1) + 2;	/* SPcox (H) */

+  if (j3d->cinfo->codec_format == CODEC_J3D) {

+    /* Table A.7 */

+    shift = 0;

+  }

+	tccp->cblk[0] = cio_read(cio, 1) + shift;	/* SPcox (G) */

+	tccp->cblk[1] = cio_read(cio, 1) + shift;	/* SPcox (H) */

 	if (j3d->cinfo->codec_format == CODEC_J3D)

-		tccp->cblk[2] = cio_read(cio, 1) + 2;	/* SPcox (I) */

+		tccp->cblk[2] = cio_read(cio, 1) + shift;	/* SPcox (I) */

 	else

 		tccp->cblk[2] = tccp->cblk[0];