opj-v1-branch created

CHANGES

@@ -5,6 +5,11 @@ What's New for OpenJPEG
 ! : changed
 + : added
 
+_______ R812 : OPJ-V1-BRANCH created ______________________________
+
+July 10, 2011
+! [antonin] improved encoding speed in t1_encode_cblks (credit to Giuseppe Baruffa)
+
 July 3, 2011
 * [antonin] fixed bmptoimage (see http://groups.google.com/group/openjpeg/browse_thread/thread/33a24c5896bf6391)
 * [antonin] fixed handling of "jp2->meth" value (Restricted ICC profile handling currently not implemented)

libopenjpeg/t1.c

@@ -1413,6 +1413,7 @@ void t1_encode_cblks(
 
 			for (bandno = 0; bandno < res->numbands; ++bandno) {
 				opj_tcd_band_t* restrict band = &res->bands[bandno];
+        int bandconst = 8192 * 8192 / ((int) floor(band->stepsize * 8192));
 
 				for (precno = 0; precno < res->pw * res->ph; ++precno) {
 					opj_tcd_precinct_t *prc = &band->precincts[precno];
@@ -1463,7 +1464,7 @@ void t1_encode_cblks(
 									datap[(j * cblk_w) + i] =
 										fix_mul(
 										tmp,
-										8192 * 8192 / ((int) floor(band->stepsize * 8192))) >> (11 - T1_NMSEDEC_FRACBITS);
+										bandconst) >> (11 - T1_NMSEDEC_FRACBITS);
 								}
 							}
 						}