Make rectangular transform block available in the common lib

This prepares the integration of rectangular transform block size
with recursive transform block partition system.

Change-Id: Id96aa3790dace15619c665f438241938992d1730

av1/common/idct.h

@@ -67,12 +67,10 @@ void av1_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride,
 
 void av1_inv_txfm_add_4x4(const tran_low_t *input, uint8_t *dest, int stride,
                           int eob, TX_TYPE tx_type, int lossless);
-#if CONFIG_EXT_TX
 void av1_inv_txfm_add_8x4(const tran_low_t *input, uint8_t *dest, int stride,
                           int eob, TX_TYPE tx_type);
 void av1_inv_txfm_add_4x8(const tran_low_t *input, uint8_t *dest, int stride,
                           int eob, TX_TYPE tx_type);
-#endif  // CONFIG_EXT_TX
 void av1_inv_txfm_add_8x8(const tran_low_t *input, uint8_t *dest, int stride,
                           int eob, TX_TYPE tx_type);
 void av1_inv_txfm_add_16x16(const tran_low_t *input, uint8_t *dest, int stride,
@@ -95,12 +93,10 @@ void av1_highbd_idct32x32_add(const tran_low_t *input, uint8_t *dest,
 void av1_highbd_inv_txfm_add_4x4(const tran_low_t *input, uint8_t *dest,
                                  int stride, int eob, int bd, TX_TYPE tx_type,
                                  int lossless);
-#if CONFIG_EXT_TX
 void av1_highbd_inv_txfm_add_4x8(const tran_low_t *input, uint8_t *dest,
                                  int stride, int eob, int bd, TX_TYPE tx_type);
 void av1_highbd_inv_txfm_add_8x4(const tran_low_t *input, uint8_t *dest,
                                  int stride, int eob, int bd, TX_TYPE tx_type);
-#endif  // CONFIG_EXT_TX
 void av1_highbd_inv_txfm_add_8x8(const tran_low_t *input, uint8_t *dest,
                                  int stride, int eob, int bd, TX_TYPE tx_type);
 void av1_highbd_inv_txfm_add_16x16(const tran_low_t *input, uint8_t *dest,

av1/common/scan.h

@@ -27,6 +27,7 @@ extern "C" {
 
 extern const SCAN_ORDER av1_default_scan_orders[TX_SIZES];
 extern const SCAN_ORDER av1_intra_scan_orders[TX_SIZES][TX_TYPES];
+extern const SCAN_ORDER av1_inter_scan_orders[TX_SIZES_ALL][TX_TYPES];
 
 #if CONFIG_ADAPT_SCAN
 void av1_update_scan_prob(AV1_COMMON *cm, TX_SIZE tx_size, TX_TYPE tx_type,
@@ -87,7 +88,7 @@ static INLINE const SCAN_ORDER *get_scan(const AV1_COMMON *cm, TX_SIZE tx_size,
   return &cm->fc->sc[tx_size][tx_type];
 #else  // CONFIG_ADAPT_SCAN
   (void)cm;
-#if CONFIG_EXT_TX
+#if CONFIG_EXT_TX || CONFIG_VAR_TX
   return is_inter ? &av1_inter_scan_orders[tx_size][tx_type]
                   : &av1_intra_scan_orders[tx_size][tx_type];
 #else