Use a Type-IV 8-point DST instead of the Type-VII.
Change-Id: I5c9576069e75b0f369fa9db88d05c0342baf8e6d
diff --git a/av1/common/daala_tx.c b/av1/common/daala_tx.c
index 0eb5633..dd5b558 100644
--- a/av1/common/daala_tx.c
+++ b/av1/common/daala_tx.c
@@ -4760,6 +4760,63 @@
x[7*xstride] = (od_coeff)r7;
}
+#if 1
+void od_bin_fdst8(od_coeff y[8], const od_coeff *x, int xstride) {
+ int r0;
+ int r1;
+ int r2;
+ int r3;
+ int r4;
+ int r5;
+ int r6;
+ int r7;
+ r0 = x[0*xstride];
+ r1 = x[1*xstride];
+ r2 = x[2*xstride];
+ r3 = x[3*xstride];
+ r4 = x[4*xstride];
+ r5 = x[5*xstride];
+ r6 = x[6*xstride];
+ r7 = x[7*xstride];
+ OD_FDST_8_FLAT(r0, r1, r2, r3, r4, r5, r6, r7);
+ y[0] = (od_coeff)r0;
+ y[1] = (od_coeff)r4;
+ y[2] = (od_coeff)r2;
+ y[3] = (od_coeff)r6;
+ y[4] = (od_coeff)r1;
+ y[5] = (od_coeff)r5;
+ y[6] = (od_coeff)r3;
+ y[7] = (od_coeff)r7;
+}
+
+void od_bin_idst8(od_coeff *x, int xstride, const od_coeff y[8]) {
+ int r0;
+ int r1;
+ int r2;
+ int r3;
+ int r4;
+ int r5;
+ int r6;
+ int r7;
+ r0 = y[0];
+ r4 = y[1];
+ r2 = y[2];
+ r6 = y[3];
+ r1 = y[4];
+ r5 = y[5];
+ r3 = y[6];
+ r7 = y[7];
+ OD_IDST_8_FLAT(r0, r4, r2, r6, r1, r5, r3, r7);
+ x[0*xstride] = (od_coeff)r0;
+ x[1*xstride] = (od_coeff)r1;
+ x[2*xstride] = (od_coeff)r2;
+ x[3*xstride] = (od_coeff)r3;
+ x[4*xstride] = (od_coeff)r4;
+ x[5*xstride] = (od_coeff)r5;
+ x[6*xstride] = (od_coeff)r6;
+ x[7*xstride] = (od_coeff)r7;
+}
+#else
const int OD_DST_8_PERM[8] = { 0, 7, 1, 6, 2, 5, 3, 4 };
/* Computes the Polynomial Product Y(z) ≡ X(z)*H(z) modulo (z^8 + 1) using
@@ -4962,7 +5019,7 @@
od_poly_prod_8(xp, yp);
for (i = 0; i < 8; i++) x[i*xstride] = xp[i];
}
-
+#endif
void od_bin_fdct16(od_coeff y[16], const od_coeff *x, int xstride) {
int s0;
int s1;
