Backport EXT_TX experiment from nextgen

Does not include DST1 yet.

derflr: +1.437 (8-bit internal), +7.243 (12-bit internal)
with --enable-ext-tx

Change-Id: I91f1759fd2de794755eb6384cda52e80e979cb7d

vp10/common/blockd.h

@@ -78,6 +78,9 @@ typedef struct {
   // Only for INTER blocks
   INTERP_FILTER interp_filter;
   MV_REFERENCE_FRAME ref_frame[2];
+#if CONFIG_EXT_TX
+  EXT_TX_TYPE ext_txfrm;
+#endif
 
   // TODO(slavarnway): Delete and use bmi[3].as_mv[] instead.
   int_mv mv[2];
@@ -218,14 +221,50 @@ static const TX_TYPE intra_mode_to_tx_type_lookup[INTRA_MODES] = {
   ADST_ADST,  // TM
 };
 
-static INLINE TX_TYPE get_tx_type(PLANE_TYPE plane_type, const MACROBLOCKD *xd,
+#if CONFIG_EXT_TX
+#define GET_EXT_TX_TYPES(tx_size) \
+    ((tx_size) >= TX_32X32 ? 1 : EXT_TX_TYPES)
+#define GET_EXT_TX_TREE(tx_size) \
+    ((tx_size) >= TX_32X32 ? NULL : vp10_ext_tx_tree)
+#define GET_EXT_TX_ENCODINGS(tx_size) \
+    ((tx_size) >= TX_32X32 ? NULL : ext_tx_encodings)
+
+static TX_TYPE ext_tx_to_txtype[EXT_TX_TYPES] = {
+  DCT_DCT,
+  ADST_ADST,
+  FLIPADST_FLIPADST,
+  ADST_FLIPADST,
+  FLIPADST_ADST,
+  ADST_DCT,
+  DCT_ADST,
+  FLIPADST_DCT,
+  DCT_FLIPADST,
+};
+#endif  // CONFIG_EXT_TX
+
+static INLINE TX_TYPE get_tx_type_large(PLANE_TYPE plane_type,
+                                        const MACROBLOCKD *xd) {
+  (void) plane_type;
+  (void) xd;
+  return DCT_DCT;
+}
+
+static INLINE TX_TYPE get_tx_type(PLANE_TYPE plane_type,
+                                  const MACROBLOCKD *xd,
                                   int block_idx, TX_SIZE tx_size) {
   const MODE_INFO *const mi = xd->mi[0];
   const MB_MODE_INFO *const mbmi = &mi->mbmi;
 
 #if CONFIG_EXT_TX
-  if (xd->lossless || is_inter_block(mbmi) || tx_size >= TX_32X32)
+  if (xd->lossless || tx_size >= TX_32X32)
     return DCT_DCT;
+  if (is_inter_block(&mi->mbmi)) {
+    if (plane_type == PLANE_TYPE_Y) {
+      return ext_tx_to_txtype[mi->mbmi.ext_txfrm];
+    } else {
+      return DCT_DCT;
+    }
+  }
   return intra_mode_to_tx_type_lookup[plane_type == PLANE_TYPE_Y ?
       get_y_mode(mi, block_idx) : mbmi->uv_mode];
 #else

vp10/common/entropy.h

@@ -22,6 +22,7 @@ extern "C" {
 #endif
 
 #define DIFF_UPDATE_PROB 252
+#define GROUP_DIFF_UPDATE_PROB 252
 
 // Coefficient token alphabet
 #define ZERO_TOKEN      0   // 0     Extra Bits 0+0

vp10/common/entropymode.c

@@ -314,6 +314,25 @@ static const vpx_prob default_switchable_interp_prob[SWITCHABLE_FILTER_CONTEXTS]
   { 149, 144, },
 };
 
+#if CONFIG_EXT_TX
+const vpx_tree_index vp10_ext_tx_tree[TREE_SIZE(EXT_TX_TYPES)] = {
+  -NORM, 2,
+  4, 10,
+  6, 8,
+  -ALT1, -ALT2,
+  -ALT3, -ALT4,
+  12, 14,
+  -ALT5, -ALT6,
+  -ALT7, -ALT8,
+};
+
+static const vpx_prob default_ext_tx_prob[EXT_TX_SIZES][EXT_TX_TYPES - 1] = {
+  { 240, 128, 128, 128, 128, 128, 128, 128 },
+  { 208, 128, 128, 128, 128, 128, 128, 128 },
+  { 176, 128, 128, 128, 128, 128, 128, 128 },
+};
+#endif  // CONFIG_EXT_TX
+
 static void init_mode_probs(FRAME_CONTEXT *fc) {
   vp10_copy(fc->uv_mode_prob, default_if_uv_probs);
   vp10_copy(fc->y_mode_prob, default_if_y_probs);
@@ -326,6 +345,9 @@ static void init_mode_probs(FRAME_CONTEXT *fc) {
   fc->tx_probs = default_tx_probs;
   vp10_copy(fc->skip_probs, default_skip_probs);
   vp10_copy(fc->inter_mode_probs, default_inter_mode_probs);
+#if CONFIG_EXT_TX
+  vp10_copy(fc->ext_tx_prob, default_ext_tx_prob);
+#endif  // CONFIG_EXT_TX
 }
 
 const vpx_tree_index vp10_switchable_interp_tree
@@ -405,6 +427,13 @@ void vp10_adapt_mode_probs(VP10_COMMON *cm) {
   for (i = 0; i < SKIP_CONTEXTS; ++i)
     fc->skip_probs[i] = mode_mv_merge_probs(
         pre_fc->skip_probs[i], counts->skip[i]);
+
+#if CONFIG_EXT_TX
+  for (i = TX_4X4; i <= TX_16X16; ++i) {
+    vpx_tree_merge_probs(vp10_ext_tx_tree, pre_fc->ext_tx_prob[i],
+                         counts->ext_tx[i], fc->ext_tx_prob[i]);
+  }
+#endif  // CONFIG_EXT_TX
 }
 
 static void set_default_lf_deltas(struct loopfilter *lf) {

vp10/common/entropymode.h

@@ -56,6 +56,9 @@ typedef struct frame_contexts {
   struct tx_probs tx_probs;
   vpx_prob skip_probs[SKIP_CONTEXTS];
   nmv_context nmvc;
+#if CONFIG_EXT_TX
+  vpx_prob ext_tx_prob[EXT_TX_SIZES][EXT_TX_TYPES - 1];
+#endif  // CONFIG_EXT_TX
   int initialized;
 } FRAME_CONTEXT;
 
@@ -76,6 +79,9 @@ typedef struct FRAME_COUNTS {
   struct tx_counts tx;
   unsigned int skip[SKIP_CONTEXTS][2];
   nmv_context_counts mv;
+#if CONFIG_EXT_TX
+  unsigned int ext_tx[EXT_TX_SIZES][EXT_TX_TYPES];
+#endif  // CONFIG_EXT_TX
 } FRAME_COUNTS;
 
 extern const vpx_prob vp10_kf_uv_mode_prob[INTRA_MODES][INTRA_MODES - 1];
@@ -100,6 +106,10 @@ void vp10_tx_counts_to_branch_counts_16x16(const unsigned int *tx_count_16x16p,
 void vp10_tx_counts_to_branch_counts_8x8(const unsigned int *tx_count_8x8p,
                                     unsigned int (*ct_8x8p)[2]);
 
+#if CONFIG_EXT_TX
+extern const vpx_tree_index vp10_ext_tx_tree[TREE_SIZE(EXT_TX_TYPES)];
+#endif  // CONFIG_EXT_TX
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif

vp10/common/enums.h

@@ -94,9 +94,33 @@ typedef enum {
   ADST_DCT  = 1,                      // ADST in vertical, DCT in horizontal
   DCT_ADST  = 2,                      // DCT  in vertical, ADST in horizontal
   ADST_ADST = 3,                      // ADST in both directions
-  TX_TYPES = 4
+  TX_TYPES,
+#if CONFIG_EXT_TX
+  FLIPADST_DCT = 4,
+  DCT_FLIPADST = 5,
+  FLIPADST_FLIPADST = 6,
+  ADST_FLIPADST = 7,
+  FLIPADST_ADST = 8,
+  TOTAL_TX_TYPES,
+#endif  // CONFIG_EXT_TX
 } TX_TYPE;
 
+#if CONFIG_EXT_TX
+#define EXT_TX_SIZES   3  // number of sizes that use extended transforms
+typedef enum {
+  NORM = 0,
+  ALT1 = 1,
+  ALT2 = 2,
+  ALT3 = 3,
+  ALT4 = 4,
+  ALT5 = 5,
+  ALT6 = 6,
+  ALT7 = 7,
+  ALT8 = 8,
+  EXT_TX_TYPES
+} EXT_TX_TYPE;
+#endif  // CONFIG_EXT_TX
+
 typedef enum {
   VP9_LAST_FLAG = 1 << 0,
   VP9_GOLD_FLAG = 1 << 1,

vp10/common/idct.c

@@ -57,6 +57,74 @@ static const transform_2d IHT_8[] = {
   { iadst8_c, iadst8_c }   // ADST_ADST = 3
 };
 
+#if CONFIG_EXT_TX
+void fliplr(uint8_t *dest, int stride, int l) {
+  int i, j;
+  for (i = 0; i < l; ++i) {
+    for (j = 0; j < l / 2; ++j) {
+      const uint8_t tmp = dest[i * stride + j];
+      dest[i * stride + j] = dest[i * stride + l - 1 - j];
+      dest[i * stride + l - 1 - j] = tmp;
+    }
+  }
+}
+
+void flipud(uint8_t *dest, int stride, int l) {
+  int i, j;
+  for (j = 0; j < l; ++j) {
+    for (i = 0; i < l / 2; ++i) {
+      const uint8_t tmp = dest[i * stride + j];
+      dest[i * stride + j] = dest[(l - 1 - i) * stride + j];
+      dest[(l - 1 - i) * stride + j] = tmp;
+    }
+  }
+}
+
+void fliplrud(uint8_t *dest, int stride, int l) {
+  int i, j;
+  for (i = 0; i < l / 2; ++i) {
+    for (j = 0; j < l; ++j) {
+      const uint8_t tmp = dest[i * stride + j];
+      dest[i * stride + j] = dest[(l - 1 - i) * stride + l - 1 - j];
+      dest[(l - 1 - i) * stride + l - 1 - j] = tmp;
+    }
+  }
+}
+
+void fliplr16(uint16_t *dest, int stride, int l) {
+  int i, j;
+  for (i = 0; i < l; ++i) {
+    for (j = 0; j < l / 2; ++j) {
+      const uint16_t tmp = dest[i * stride + j];
+      dest[i * stride + j] = dest[i * stride + l - 1 - j];
+      dest[i * stride + l - 1 - j] = tmp;
+    }
+  }
+}
+
+void flipud16(uint16_t *dest, int stride, int l) {
+  int i, j;
+  for (j = 0; j < l; ++j) {
+    for (i = 0; i < l / 2; ++i) {
+      const uint16_t tmp = dest[i * stride + j];
+      dest[i * stride + j] = dest[(l - 1 - i) * stride + j];
+      dest[(l - 1 - i) * stride + j] = tmp;
+    }
+  }
+}
+
+void fliplrud16(uint16_t *dest, int stride, int l) {
+  int i, j;
+  for (i = 0; i < l / 2; ++i) {
+    for (j = 0; j < l; ++j) {
+      const uint16_t tmp = dest[i * stride + j];
+      dest[i * stride + j] = dest[(l - 1 - i) * stride + l - 1 - j];
+      dest[(l - 1 - i) * stride + l - 1 - j] = tmp;
+    }
+  }
+}
+#endif  // CONFIG_EXT_TX
+
 void vp10_iht8x8_64_add_c(const tran_low_t *input, uint8_t *dest, int stride,
                          int tx_type) {
   int i, j;
@@ -178,10 +246,11 @@ void vp10_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride,
     vpx_idct32x32_1024_add(input, dest, stride);
 }
 
-void vp10_inv_txfm_add_4x4(const tran_low_t *input, uint8_t *dest,
-                           int stride, int eob, TX_TYPE tx_type,
-                           void (*itxm_add_4x4)(const tran_low_t *input,
-                               uint8_t *dest, int stride, int eob)) {
+void vp10_inv_txfm_add_4x4(
+    const tran_low_t *input, uint8_t *dest,
+    int stride, int eob, TX_TYPE tx_type,
+    void (*itxm_add_4x4)(const tran_low_t *input,
+                         uint8_t *dest, int stride, int eob)) {
   switch (tx_type) {
     case DCT_DCT:
       itxm_add_4x4(input, dest, stride, eob);
@@ -191,6 +260,33 @@ void vp10_inv_txfm_add_4x4(const tran_low_t *input, uint8_t *dest,
     case ADST_ADST:
       vp10_iht4x4_16_add(input, dest, stride, tx_type);
       break;
+#if CONFIG_EXT_TX
+    case FLIPADST_DCT:
+      flipud(dest, stride, 4);
+      vp10_iht4x4_16_add(input, dest, stride, ADST_DCT);
+      flipud(dest, stride, 4);
+      break;
+    case DCT_FLIPADST:
+      fliplr(dest, stride, 4);
+      vp10_iht4x4_16_add(input, dest, stride, DCT_ADST);
+      fliplr(dest, stride, 4);
+      break;
+    case FLIPADST_FLIPADST:
+      fliplrud(dest, stride, 4);
+      vp10_iht4x4_16_add(input, dest, stride, ADST_ADST);
+      fliplrud(dest, stride, 4);
+      break;
+    case ADST_FLIPADST:
+      fliplr(dest, stride, 4);
+      vp10_iht4x4_16_add(input, dest, stride, ADST_ADST);
+      fliplr(dest, stride, 4);
+      break;
+    case FLIPADST_ADST:
+      flipud(dest, stride, 4);
+      vp10_iht4x4_16_add(input, dest, stride, ADST_ADST);
+      flipud(dest, stride, 4);
+      break;
+#endif  // CONFIG_EXT_TX
     default:
       assert(0);
       break;
@@ -208,6 +304,33 @@ void vp10_inv_txfm_add_8x8(const tran_low_t *input, uint8_t *dest,
     case ADST_ADST:
       vp10_iht8x8_64_add(input, dest, stride, tx_type);
       break;
+#if CONFIG_EXT_TX
+    case FLIPADST_DCT:
+      flipud(dest, stride, 8);
+      vp10_iht8x8_64_add(input, dest, stride, ADST_DCT);
+      flipud(dest, stride, 8);
+      break;
+    case DCT_FLIPADST:
+      fliplr(dest, stride, 8);
+      vp10_iht8x8_64_add(input, dest, stride, DCT_ADST);
+      fliplr(dest, stride, 8);
+      break;
+    case FLIPADST_FLIPADST:
+      fliplrud(dest, stride, 8);
+      vp10_iht8x8_64_add(input, dest, stride, ADST_ADST);
+      fliplrud(dest, stride, 8);
+      break;
+    case ADST_FLIPADST:
+      fliplr(dest, stride, 8);
+      vp10_iht8x8_64_add(input, dest, stride, ADST_ADST);
+      fliplr(dest, stride, 8);
+      break;
+    case FLIPADST_ADST:
+      flipud(dest, stride, 8);
+      vp10_iht8x8_64_add(input, dest, stride, ADST_ADST);
+      flipud(dest, stride, 8);
+      break;
+#endif  // CONFIG_EXT_TX
     default:
       assert(0);
       break;
@@ -225,6 +348,33 @@ void vp10_inv_txfm_add_16x16(const tran_low_t *input, uint8_t *dest,
     case ADST_ADST:
       vp10_iht16x16_256_add(input, dest, stride, tx_type);
       break;
+#if CONFIG_EXT_TX
+    case FLIPADST_DCT:
+      flipud(dest, stride, 16);
+      vp10_iht16x16_256_add(input, dest, stride, ADST_DCT);
+      flipud(dest, stride, 16);
+      break;
+    case DCT_FLIPADST:
+      fliplr(dest, stride, 16);
+      vp10_iht16x16_256_add(input, dest, stride, DCT_ADST);
+      fliplr(dest, stride, 16);
+      break;
+    case FLIPADST_FLIPADST:
+      fliplrud(dest, stride, 16);
+      vp10_iht16x16_256_add(input, dest, stride, ADST_ADST);
+      fliplrud(dest, stride, 16);
+      break;
+    case ADST_FLIPADST:
+      fliplr(dest, stride, 16);
+      vp10_iht16x16_256_add(input, dest, stride, ADST_ADST);
+      fliplr(dest, stride, 16);
+      break;
+    case FLIPADST_ADST:
+      flipud(dest, stride, 16);
+      vp10_iht16x16_256_add(input, dest, stride, ADST_ADST);
+      flipud(dest, stride, 16);
+      break;
+#endif  // CONFIG_EXT_TX
     default:
       assert(0);
       break;
@@ -430,6 +580,33 @@ void vp10_highbd_inv_txfm_add_4x4(const tran_low_t *input, uint8_t *dest,
     case ADST_ADST:
       vp10_highbd_iht4x4_16_add(input, dest, stride, tx_type, bd);
       break;
+#if CONFIG_EXT_TX
+    case FLIPADST_DCT:
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      vp10_highbd_iht4x4_16_add(input, dest, stride, ADST_DCT, bd);
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      break;
+    case DCT_FLIPADST:
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      vp10_highbd_iht4x4_16_add(input, dest, stride, DCT_ADST, bd);
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      break;
+    case FLIPADST_FLIPADST:
+      fliplrud16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      vp10_highbd_iht4x4_16_add(input, dest, stride, ADST_ADST, bd);
+      fliplrud16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      break;
+    case ADST_FLIPADST:
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      vp10_highbd_iht4x4_16_add(input, dest, stride, ADST_ADST, bd);
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      break;
+    case FLIPADST_ADST:
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      vp10_highbd_iht4x4_16_add(input, dest, stride, ADST_ADST, bd);
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 4);
+      break;
+#endif  // CONFIG_EXT_TX
     default:
       assert(0);
       break;
@@ -448,6 +625,33 @@ void vp10_highbd_inv_txfm_add_8x8(const tran_low_t *input, uint8_t *dest,
     case ADST_ADST:
       vp10_highbd_iht8x8_64_add(input, dest, stride, tx_type, bd);
       break;
+#if CONFIG_EXT_TX
+    case FLIPADST_DCT:
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      vp10_highbd_iht8x8_64_add(input, dest, stride, ADST_DCT, bd);
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      break;
+    case DCT_FLIPADST:
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      vp10_highbd_iht8x8_64_add(input, dest, stride, DCT_ADST, bd);
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      break;
+    case FLIPADST_FLIPADST:
+      fliplrud16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      vp10_highbd_iht8x8_64_add(input, dest, stride, ADST_ADST, bd);
+      fliplrud16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      break;
+    case ADST_FLIPADST:
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      vp10_highbd_iht8x8_64_add(input, dest, stride, ADST_ADST, bd);
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      break;
+    case FLIPADST_ADST:
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      vp10_highbd_iht8x8_64_add(input, dest, stride, ADST_ADST, bd);
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 8);
+      break;
+#endif  // CONFIG_EXT_TX
     default:
       assert(0);
       break;
@@ -466,6 +670,33 @@ void vp10_highbd_inv_txfm_add_16x16(const tran_low_t *input, uint8_t *dest,
     case ADST_ADST:
       vp10_highbd_iht16x16_256_add(input, dest, stride, tx_type, bd);
       break;
+#if CONFIG_EXT_TX
+    case FLIPADST_DCT:
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      vp10_highbd_iht16x16_256_add(input, dest, stride, ADST_DCT, bd);
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      break;
+    case DCT_FLIPADST:
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      vp10_highbd_iht16x16_256_add(input, dest, stride, DCT_ADST, bd);
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      break;
+    case FLIPADST_FLIPADST:
+      fliplrud16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      vp10_highbd_iht16x16_256_add(input, dest, stride, ADST_ADST, bd);
+      fliplrud16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      break;
+    case ADST_FLIPADST:
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      vp10_highbd_iht16x16_256_add(input, dest, stride, ADST_ADST, bd);
+      fliplr16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      break;
+    case FLIPADST_ADST:
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      vp10_highbd_iht16x16_256_add(input, dest, stride, ADST_ADST, bd);
+      flipud16(CONVERT_TO_SHORTPTR(dest), stride, 16);
+      break;
+#endif  // CONFIG_EXT_TX
     default:
       assert(0);
       break;

vp10/common/scan.c

@@ -702,7 +702,7 @@ const scan_order vp10_default_scan_orders[TX_SIZES] = {
   {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
 };
 
-const scan_order vp10_scan_orders[TX_SIZES][TX_TYPES] = {
+const scan_order vp10_intra_scan_orders[TX_SIZES][TX_TYPES] = {
   {  // TX_4X4
     {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
     {row_scan_4x4,     vp10_row_iscan_4x4,     row_scan_4x4_neighbors},
@@ -725,3 +725,49 @@ const scan_order vp10_scan_orders[TX_SIZES][TX_TYPES] = {
     {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
   }
 };
+
+#if CONFIG_EXT_TX
+const scan_order vp10_inter_scan_orders[TX_SIZES][TOTAL_TX_TYPES] = {
+  {  // TX_4X4
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+    {default_scan_4x4, vp10_default_iscan_4x4, default_scan_4x4_neighbors},
+  }, {  // TX_8X8
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+    {default_scan_8x8, vp10_default_iscan_8x8, default_scan_8x8_neighbors},
+  }, {  // TX_16X16
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+    {default_scan_16x16, vp10_default_iscan_16x16, default_scan_16x16_neighbors},
+  }, {  // TX_32X32
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+    {default_scan_32x32, vp10_default_iscan_32x32, default_scan_32x32_neighbors},
+  }
+};
+#endif  // CONFIG_EXT_TX

vp10/common/scan.h

@@ -30,7 +30,7 @@ typedef struct {
 } scan_order;
 
 extern const scan_order vp10_default_scan_orders[TX_SIZES];
-extern const scan_order vp10_scan_orders[TX_SIZES][TX_TYPES];
+extern const scan_order vp10_intra_scan_orders[TX_SIZES][TX_TYPES];
 
 static INLINE int get_coef_context(const int16_t *neighbors,
                                    const uint8_t *token_cache, int c) {
@@ -38,8 +38,31 @@ static INLINE int get_coef_context(const int16_t *neighbors,
           token_cache[neighbors[MAX_NEIGHBORS * c + 1]]) >> 1;
 }
 
-static INLINE const scan_order *get_scan(TX_SIZE tx_size, TX_TYPE tx_type) {
-  return &vp10_scan_orders[tx_size][tx_type];
+static INLINE const scan_order *get_intra_scan(TX_SIZE tx_size,
+                                               TX_TYPE tx_type) {
+  return &vp10_intra_scan_orders[tx_size][tx_type];
+}
+
+#if CONFIG_EXT_TX
+extern const scan_order vp10_inter_scan_orders[TX_SIZES][TOTAL_TX_TYPES];
+
+static INLINE const scan_order *get_inter_scan(TX_SIZE tx_size,
+                                               TX_TYPE tx_type) {
+  return &vp10_inter_scan_orders[tx_size][tx_type];
+}
+#endif  // CONFIG_EXT_TX
+
+static INLINE const scan_order *get_scan(TX_SIZE tx_size,
+                                         TX_TYPE tx_type,
+                                         int is_inter) {
+#if CONFIG_EXT_TX
+  return
+      is_inter ? &vp10_inter_scan_orders[tx_size][tx_type] :
+                 &vp10_intra_scan_orders[tx_size][tx_type];
+#else
+  (void) is_inter;
+  return &vp10_intra_scan_orders[tx_size][tx_type];
+#endif  // CONFIG_EXT_TX
 }
 
 #ifdef __cplusplus

vp10/decoder/decodeframe.c

@@ -348,7 +348,7 @@ static void predict_and_reconstruct_intra_block(MACROBLOCKD *const xd,
 
   if (!mbmi->skip) {
     TX_TYPE tx_type = get_tx_type(plane_type, xd, block_idx, tx_size);
-    const scan_order *sc = get_scan(tx_size, tx_type);
+    const scan_order *sc = get_scan(tx_size, tx_type, 0);
     const int eob = vp10_decode_block_tokens(xd, plane, sc, col, row, tx_size,
                                              r, mbmi->segment_id);
     inverse_transform_block_intra(xd, plane, tx_type, tx_size,
@@ -363,7 +363,7 @@ static int reconstruct_inter_block(MACROBLOCKD *const xd, vpx_reader *r,
   PLANE_TYPE plane_type = (plane == 0) ? PLANE_TYPE_Y : PLANE_TYPE_UV;
   int block_idx = (row << 1) + col;
   TX_TYPE tx_type = get_tx_type(plane_type, xd, block_idx, tx_size);
-  const scan_order *sc = get_scan(tx_size, tx_type);
+  const scan_order *sc = get_scan(tx_size, tx_type, 1);
   const int eob = vp10_decode_block_tokens(xd, plane, sc, col, row, tx_size, r,
                                           mbmi->segment_id);
 
@@ -1970,6 +1970,17 @@ static size_t read_uncompressed_header(VP10Decoder *pbi,
   return sz;
 }
 
+#if CONFIG_EXT_TX