+/* <summary> */
+/* Forward 9-7 wavelet transform in 1-D. */
+/* </summary> */
+static void dwt_encode_1_real(int *a, int dn, int sn, int cas) {
+ int i;
+ if (!cas) {
+ if ((dn > 0) || (sn > 1)) { /* NEW : CASE ONE ELEMENT */
+ for (i = 0; i < dn; i++)
+ D(i) -= fix_mul(S_(i) + S_(i + 1), 12993);
+ for (i = 0; i < sn; i++)
+ S(i) -= fix_mul(D_(i - 1) + D_(i), 434);
+ for (i = 0; i < dn; i++)
+ D(i) += fix_mul(S_(i) + S_(i + 1), 7233);
+ for (i = 0; i < sn; i++)
+ S(i) += fix_mul(D_(i - 1) + D_(i), 3633);
+ for (i = 0; i < dn; i++)
+ D(i) = fix_mul(D(i), 5038); /*5038 */
+ for (i = 0; i < sn; i++)
+ S(i) = fix_mul(S(i), 6659); /*6660 */
+ }
+ } else {
+ if ((sn > 0) || (dn > 1)) { /* NEW : CASE ONE ELEMENT */
+ for (i = 0; i < dn; i++)
+ S(i) -= fix_mul(DD_(i) + DD_(i - 1), 12993);
+ for (i = 0; i < sn; i++)
+ D(i) -= fix_mul(SS_(i) + SS_(i + 1), 434);
+ for (i = 0; i < dn; i++)
+ S(i) += fix_mul(DD_(i) + DD_(i - 1), 7233);
+ for (i = 0; i < sn; i++)
+ D(i) += fix_mul(SS_(i) + SS_(i + 1), 3633);
+ for (i = 0; i < dn; i++)
+ S(i) = fix_mul(S(i), 5038); /*5038 */
+ for (i = 0; i < sn; i++)
+ D(i) = fix_mul(D(i), 6659); /*6660 */
+ }
+ }
+}
+
+/* <summary> */
+/* Inverse 9-7 wavelet transform in 1-D. */
+/* </summary> */
+static void dwt_decode_1_real(int *a, int dn, int sn, int cas) {
+ int i;
+ if (!cas) {
+ if ((dn > 0) || (sn > 1)) { /* NEW : CASE ONE ELEMENT */
+ for (i = 0; i < sn; i++)
+ S(i) = fix_mul(S(i), 10078); /* 10076 */
+ for (i = 0; i < dn; i++)
+ D(i) = fix_mul(D(i), 13318); /* 13320 */
+ for (i = 0; i < sn; i++)
+ S(i) -= fix_mul(D_(i - 1) + D_(i), 3633);
+ for (i = 0; i < dn; i++)
+ D(i) -= fix_mul(S_(i) + S_(i + 1), 7233);
+ for (i = 0; i < sn; i++)
+ S(i) += fix_mul(D_(i - 1) + D_(i), 434);
+ for (i = 0; i < dn; i++)
+ D(i) += fix_mul(S_(i) + S_(i + 1), 12994); /* 12993 */
+ }
+ } else {
+ if ((sn > 0) || (dn > 1)) { /* NEW : CASE ONE ELEMENT */
+ for (i = 0; i < sn; i++)
+ D(i) = fix_mul(D(i), 10078); /* 10076 */
+ for (i = 0; i < dn; i++)
+ S(i) = fix_mul(S(i), 13318); /* 13320 */
+ for (i = 0; i < sn; i++)
+ D(i) -= fix_mul(SS_(i) + SS_(i + 1), 3633);
+ for (i = 0; i < dn; i++)
+ S(i) -= fix_mul(DD_(i) + DD_(i - 1), 7233);
+ for (i = 0; i < sn; i++)
+ D(i) += fix_mul(SS_(i) + SS_(i + 1), 434);
+ for (i = 0; i < dn; i++)
+ S(i) += fix_mul(DD_(i) + DD_(i - 1), 12994); /* 12993 */
+ }
+ }
+}
+
+static void dwt_encode_stepsize(int stepsize, int numbps, opj_stepsize_t *bandno_stepsize) {
+ int p, n;
+ p = int_floorlog2(stepsize) - 13;
+ n = 11 - int_floorlog2(stepsize);
+ bandno_stepsize->mant = (n < 0 ? stepsize >> -n : stepsize << n) & 0x7ff;
+ bandno_stepsize->expn = numbps - p;
+}
+
+/*
+==========================================================
+ DWT interface
+==========================================================
+*/