Move daala_fdst4() / daala_idst4() into daala_tx.c.

This commit has no impact on metrics.

Change-Id: I85007ef966b9aab4545499016ed68ab5c96a417a
diff --git a/aom_dsp/inv_txfm.c b/aom_dsp/inv_txfm.c
index c6c2f64..65913fb 100644
--- a/aom_dsp/inv_txfm.c
+++ b/aom_dsp/inv_txfm.c
@@ -264,16 +264,6 @@
   }
 }
 
-#if CONFIG_DAALA_DCT4
-void aom_iadst4_c(const tran_low_t *input, tran_low_t *output) {
-  int i;
-  od_coeff x[4];
-  od_coeff y[4];
-  for (i = 0; i < 4; i++) y[i] = input[i];
-  od_bin_idst4(x, 1, y);
-  for (i = 0; i < 4; i++) output[i] = (tran_low_t)x[i];
-}
-#else
 void aom_iadst4_c(const tran_low_t *input, tran_low_t *output) {
   tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
 
@@ -310,7 +300,6 @@
   output[2] = WRAPLOW(dct_const_round_shift(s2));
   output[3] = WRAPLOW(dct_const_round_shift(s0 + s1 - s3));
 }
-#endif
 
 #if CONFIG_DAALA_DCT8
 void aom_iadst8_c(const tran_low_t *input, tran_low_t *output) {
diff --git a/av1/common/daala_tx.c b/av1/common/daala_tx.c
index 9ad6388..8f93645 100644
--- a/av1/common/daala_tx.c
+++ b/av1/common/daala_tx.c
@@ -4124,3 +4124,21 @@
   od_bin_idct4(x, 1, y);
   for (i = 0; i < 4; i++) output[i] = (tran_low_t)x[i];
 }
+
+void daala_fdst4(const tran_low_t *input, tran_low_t *output) {
+  int i;
+  od_coeff x[4];
+  od_coeff y[4];
+  for (i = 0; i < 4; i++) x[i] = (od_coeff)input[i];
+  od_bin_fdst4(y, x, 1);
+  for (i = 0; i < 4; i++) output[i] = (tran_low_t)y[i];
+}
+
+void daala_idst4(const tran_low_t *input, tran_low_t *output) {
+  int i;
+  od_coeff x[4];
+  od_coeff y[4];
+  for (i = 0; i < 4; i++) y[i] = input[i];
+  od_bin_idst4(x, 1, y);
+  for (i = 0; i < 4; i++) output[i] = (tran_low_t)x[i];
+}
diff --git a/av1/common/daala_tx.h b/av1/common/daala_tx.h
index 061876f..59f88b2 100644
--- a/av1/common/daala_tx.h
+++ b/av1/common/daala_tx.h
@@ -6,6 +6,8 @@
 
 void daala_fdct4(const tran_low_t *input, tran_low_t *output);
 void daala_idct4(const tran_low_t *input, tran_low_t *output);
+void daala_fdst4(const tran_low_t *input, tran_low_t *output);
+void daala_idst4(const tran_low_t *input, tran_low_t *output);
 
 void od_bin_fdct4(od_coeff y[4], const od_coeff *x, int xstride);
 void od_bin_idct4(od_coeff *x, int xstride, const od_coeff y[4]);
diff --git a/av1/common/idct.c b/av1/common/idct.c
index a9bfb9a..b4e3f04 100644
--- a/av1/common/idct.c
+++ b/av1/common/idct.c
@@ -331,23 +331,23 @@
 #endif
   static const transform_2d IHT_4[] = {
 #if CONFIG_DAALA_DCT4
-    { daala_idct4, daala_idct4 },    // DCT_DCT  = 0
-    { aom_iadst4_c, daala_idct4 },   // ADST_DCT = 1
-    { daala_idct4, aom_iadst4_c },   // DCT_ADST = 2
-    { aom_iadst4_c, aom_iadst4_c },  // ADST_ADST = 3
+    { daala_idct4, daala_idct4 },  // DCT_DCT  = 0
+    { daala_idst4, daala_idct4 },  // ADST_DCT = 1
+    { daala_idct4, daala_idst4 },  // DCT_ADST = 2
+    { daala_idst4, daala_idst4 },  // ADST_ADST = 3
 #if CONFIG_EXT_TX
-    { aom_iadst4_c, daala_idct4 },   // FLIPADST_DCT
-    { daala_idct4, aom_iadst4_c },   // DCT_FLIPADST
-    { aom_iadst4_c, aom_iadst4_c },  // FLIPADST_FLIPADST
-    { aom_iadst4_c, aom_iadst4_c },  // ADST_FLIPADST
-    { aom_iadst4_c, aom_iadst4_c },  // FLIPADST_ADST
-    { iidtx4_c, iidtx4_c },          // IDTX
-    { daala_idct4, iidtx4_c },       // V_DCT
-    { iidtx4_c, daala_idct4 },       // H_DCT
-    { aom_iadst4_c, iidtx4_c },      // V_ADST
-    { iidtx4_c, aom_iadst4_c },      // H_ADST
-    { aom_iadst4_c, iidtx4_c },      // V_FLIPADST
-    { iidtx4_c, aom_iadst4_c },      // H_FLIPADST
+    { daala_idst4, daala_idct4 },  // FLIPADST_DCT
+    { daala_idct4, daala_idst4 },  // DCT_FLIPADST
+    { daala_idst4, daala_idst4 },  // FLIPADST_FLIPADST
+    { daala_idst4, daala_idst4 },  // ADST_FLIPADST
+    { daala_idst4, daala_idst4 },  // FLIPADST_ADST
+    { iidtx4_c, iidtx4_c },        // IDTX
+    { daala_idct4, iidtx4_c },     // V_DCT
+    { iidtx4_c, daala_idct4 },     // H_DCT
+    { daala_idst4, iidtx4_c },     // V_ADST
+    { iidtx4_c, daala_idst4 },     // H_ADST
+    { daala_idst4, iidtx4_c },     // V_FLIPADST
+    { iidtx4_c, daala_idst4 },     // H_FLIPADST
 #endif
 #else
     { aom_idct4_c, aom_idct4_c },    // DCT_DCT  = 0
diff --git a/av1/encoder/dct.c b/av1/encoder/dct.c
index 8027c9a..7cbe0d0 100644
--- a/av1/encoder/dct.c
+++ b/av1/encoder/dct.c
@@ -780,18 +780,6 @@
 }
 #endif
 
-#if CONFIG_DAALA_DCT4
-static void fadst4(const tran_low_t *input, tran_low_t *output) {
-  int i;
-  od_coeff x[4];
-  od_coeff y[4];
-  for (i = 0; i < 4; i++) x[i] = (od_coeff)input[i];
-  od_bin_fdst4(y, x, 1);
-  for (i = 0; i < 4; i++) output[i] = (tran_low_t)y[i];
-}
-
-#else
-
 static void fadst4(const tran_low_t *input, tran_low_t *output) {
   tran_high_t x0, x1, x2, x3;
   tran_high_t s0, s1, s2, s3, s4, s5, s6, s7;
@@ -831,7 +819,6 @@
   output[2] = (tran_low_t)fdct_round_shift(s2);
   output[3] = (tran_low_t)fdct_round_shift(s3);
 }
-#endif
 
 #if CONFIG_DAALA_DCT8
 static void fadst8(const tran_low_t *input, tran_low_t *output) {
@@ -1366,22 +1353,22 @@
     static const transform_2d FHT[] = {
 #if CONFIG_DAALA_DCT4
       { daala_fdct4, daala_fdct4 },  // DCT_DCT
-      { fadst4, daala_fdct4 },       // ADST_DCT
-      { daala_fdct4, fadst4 },       // DCT_ADST
-      { fadst4, fadst4 },            // ADST_ADST
+      { daala_fdst4, daala_fdct4 },  // ADST_DCT
+      { daala_fdct4, daala_fdst4 },  // DCT_ADST
+      { daala_fdst4, daala_fdst4 },  // ADST_ADST
 #if CONFIG_EXT_TX
-      { fadst4, daala_fdct4 },  // FLIPADST_DCT
-      { daala_fdct4, fadst4 },  // DCT_FLIPADST
-      { fadst4, fadst4 },       // FLIPADST_FLIPADST
-      { fadst4, fadst4 },       // ADST_FLIPADST
-      { fadst4, fadst4 },       // FLIPADST_ADST
-      { fidtx4, fidtx4 },       // IDTX
-      { daala_fdct4, fidtx4 },  // V_DCT
-      { fidtx4, daala_fdct4 },  // H_DCT
-      { fadst4, fidtx4 },       // V_ADST
-      { fidtx4, fadst4 },       // H_ADST
-      { fadst4, fidtx4 },       // V_FLIPADST
-      { fidtx4, fadst4 },       // H_FLIPADST
+      { daala_fdst4, daala_fdct4 },  // FLIPADST_DCT
+      { daala_fdct4, daala_fdst4 },  // DCT_FLIPADST
+      { daala_fdst4, daala_fdst4 },  // FLIPADST_FLIPADST
+      { daala_fdst4, daala_fdst4 },  // ADST_FLIPADST
+      { daala_fdst4, daala_fdst4 },  // FLIPADST_ADST
+      { fidtx4, fidtx4 },            // IDTX
+      { daala_fdct4, fidtx4 },       // V_DCT
+      { fidtx4, daala_fdct4 },       // H_DCT
+      { daala_fdst4, fidtx4 },       // V_ADST
+      { fidtx4, daala_fdst4 },       // H_ADST
+      { daala_fdst4, fidtx4 },       // V_FLIPADST
+      { fidtx4, daala_fdst4 },       // H_FLIPADST
 #endif
 #else
       { fdct4, fdct4 },    // DCT_DCT