scan order / neighbors converted to lookup

Change-Id: I64b189dfeee1cf3e90134a1a93497072f3361e5e

vp9/common/vp9_scan.c

@@ -266,6 +266,62 @@ DECLARE_ALIGNED(16, int16_t, vp9_row_iscan_16x16[256]);
 DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_16x16[256]);
 DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_32x32[1024]);
 
+const scan_order inter_scan_orders[TX_SIZES] = {
+  {vp9_default_scan_4x4,   vp9_default_scan_4x4_neighbors},    // NEWMV
+  {vp9_default_scan_8x8,   vp9_default_scan_8x8_neighbors},    // NEWMV
+  {vp9_default_scan_16x16, vp9_default_scan_16x16_neighbors},  // NEWMV
+  {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // NEWMV
+};
+
+const scan_order intra_scan_orders[TX_SIZES][INTRA_MODES] = {
+  {  // 4X4
+    {vp9_default_scan_4x4,   vp9_default_scan_4x4_neighbors},    // DC
+    {vp9_row_scan_4x4,       vp9_row_scan_4x4_neighbors},        // V
+    {vp9_col_scan_4x4,       vp9_col_scan_4x4_neighbors},        // H
+    {vp9_default_scan_4x4,   vp9_default_scan_4x4_neighbors},    // D45
+    {vp9_default_scan_4x4,   vp9_default_scan_4x4_neighbors},    // D135
+    {vp9_row_scan_4x4,       vp9_row_scan_4x4_neighbors},        // D117
+    {vp9_col_scan_4x4,       vp9_col_scan_4x4_neighbors},        // D153
+    {vp9_col_scan_4x4,       vp9_col_scan_4x4_neighbors},        // D207
+    {vp9_row_scan_4x4,       vp9_row_scan_4x4_neighbors},        // D63
+    {vp9_default_scan_4x4,   vp9_default_scan_4x4_neighbors},    // TM
+  }, {  // 8x8
+    {vp9_default_scan_8x8,   vp9_default_scan_8x8_neighbors},    // DC
+    {vp9_row_scan_8x8,       vp9_row_scan_8x8_neighbors},        // V
+    {vp9_col_scan_8x8,       vp9_col_scan_8x8_neighbors},        // H
+    {vp9_default_scan_8x8,   vp9_default_scan_8x8_neighbors},    // D45
+    {vp9_default_scan_8x8,   vp9_default_scan_8x8_neighbors},    // D135
+    {vp9_row_scan_8x8,       vp9_row_scan_8x8_neighbors},        // D117
+    {vp9_col_scan_8x8,       vp9_col_scan_8x8_neighbors},        // D153
+    {vp9_col_scan_8x8,       vp9_col_scan_8x8_neighbors},        // D207
+    {vp9_row_scan_8x8,       vp9_row_scan_8x8_neighbors},        // D63
+    {vp9_default_scan_8x8,   vp9_default_scan_8x8_neighbors},    // TM
+  }, {  // 16x16
+    {vp9_default_scan_16x16, vp9_default_scan_16x16_neighbors},  // DC
+    {vp9_row_scan_16x16,     vp9_row_scan_16x16_neighbors},      // V
+    {vp9_col_scan_16x16,     vp9_col_scan_16x16_neighbors},      // H
+    {vp9_default_scan_16x16, vp9_default_scan_16x16_neighbors},  // D45
+    {vp9_default_scan_16x16, vp9_default_scan_16x16_neighbors},  // D135
+    {vp9_row_scan_16x16,     vp9_row_scan_16x16_neighbors},      // D117
+    {vp9_col_scan_16x16,     vp9_col_scan_16x16_neighbors},      // D153
+    {vp9_col_scan_16x16,     vp9_col_scan_16x16_neighbors},      // D207
+    {vp9_row_scan_16x16,     vp9_row_scan_16x16_neighbors},      // D63
+    {vp9_default_scan_16x16, vp9_default_scan_16x16_neighbors},  // TM
+  }, {  // 32x32
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // DC
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // V
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // H
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // D45
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // D135
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // D117
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // D153
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // D207
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // D63
+    {vp9_default_scan_32x32, vp9_default_scan_32x32_neighbors},  // TM
+  }
+};
+
+
 static int find_in_scan(const int16_t *scan, int l, int idx) {
   int n, l2 = l * l;
   for (n = 0; n < l2; n++) {

vp9/common/vp9_scan.h

@@ -15,6 +15,7 @@
 #include "vpx_ports/mem.h"
 
 #include "vp9/common/vp9_enums.h"
+#include "vp9/common/vp9_blockd.h"
 
 #define MAX_NEIGHBORS 2
 
@@ -67,9 +68,16 @@ extern DECLARE_ALIGNED(16, int16_t,
 extern DECLARE_ALIGNED(16, int16_t,
                        vp9_default_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]);
 
-
 void vp9_init_neighbors();
 
+typedef struct {
+  const int16_t *scan;
+  const int16_t *neighbors;
+} scan_order;
+
+extern const scan_order intra_scan_orders[TX_SIZES][INTRA_MODES];
+extern const scan_order inter_scan_orders[TX_SIZES];
+
 static INLINE const int16_t* get_scan_4x4(TX_TYPE tx_type) {
   switch (tx_type) {
     case ADST_DCT:

vp9/decoder/vp9_detokenize.c

@@ -110,8 +110,20 @@ static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
   const int16_t *scan, *nb;
   const uint8_t *cat6;
   const uint8_t *band_translate = get_band_translate(tx_size);
-  get_scan(xd, tx_size, type, block_idx, &scan, &nb);
-
+  const MODE_INFO *const mi = xd->mi_8x8[0];
+  const MB_MODE_INFO *const mbmi = &mi->mbmi;
+  scan_order const *so;
+
+  if (mbmi->ref_frame[0] > 0 || type != PLANE_TYPE_Y_WITH_DC || xd->lossless) {
+    so = &inter_scan_orders[tx_size];
+  } else {
+    MB_PREDICTION_MODE mode = mbmi->mode;
+    if (mbmi->sb_type < BLOCK_8X8)
+      mode = mi->bmi[block_idx].as_mode;
+    so = &intra_scan_orders[tx_size][mode];
+  }
+  scan = so->scan;
+  nb = so->neighbors;
   while (c < seg_eob) {
     int val;
     if (c)