1 files changed, 14 insertions, 87 deletions

diff --git a/third_party/aom/av1/common/scan.h b/third_party/aom/av1/common/scan.h
index 82d2e917f..c5cebc135 100644
--- a/third_party/aom/av1/common/scan.h
+++ b/third_party/aom/av1/common/scan.h
@@ -25,51 +25,18 @@ extern "C" {
 
 #define MAX_NEIGHBORS 2
 
-extern const SCAN_ORDER av1_default_scan_orders[TX_SIZES];
-extern const SCAN_ORDER av1_intra_scan_orders[TX_SIZES_ALL][TX_TYPES];
-extern const SCAN_ORDER av1_inter_scan_orders[TX_SIZES_ALL][TX_TYPES];
-
-#if CONFIG_ADAPT_SCAN
-#define USE_2X2_PROB 1
-#define USE_TOPOLOGICAL_SORT 0
-#define USE_LIMIT_SCAN_DISTANCE 0
-void av1_update_scan_count_facade(AV1_COMMON *cm, FRAME_COUNTS *counts,
-                                  TX_SIZE tx_size, TX_TYPE tx_type,
-                                  const tran_low_t *dqcoeffs, int max_scan);
-
-// embed r + c and coeff_idx info with nonzero probabilities. When sorting the
-// nonzero probabilities, if there is a tie, the coefficient with smaller r + c
-// will be scanned first
-void av1_augment_prob(TX_SIZE tx_size, TX_TYPE tx_type, uint32_t *prob);
+typedef enum SCAN_MODE {
+  SCAN_MODE_ZIG_ZAG,
+  SCAN_MODE_COL_DIAG,
+  SCAN_MODE_ROW_DIAG,
+  SCAN_MODE_COL_1D,
+  SCAN_MODE_ROW_1D,
+  SCAN_MODES
+} SCAN_MODE;
 
-#if USE_TOPOLOGICAL_SORT
-// apply quick sort on nonzero probabilities to obtain a sort order
-void av1_update_sort_order(TX_SIZE tx_size, TX_TYPE tx_type,
-                           const uint32_t *non_zero_prob, int16_t *sort_order);
-
-// apply topological sort on the nonzero probabilities sorting order to
-// guarantee each to-be-scanned coefficient's upper and left coefficient will be
-// scanned before the to-be-scanned coefficient.
-void av1_update_scan_order(TX_SIZE tx_size, int16_t *sort_order, int16_t *scan,
-                           int16_t *iscan);
-#else   // USE_TOPOLOGICAL_SORT
-void av1_update_scan_order(TX_SIZE tx_size, TX_TYPE tx_type,
-                           uint32_t *non_zero_prob, int16_t *scan,
-                           int16_t *iscan);
-#endif  // USE_TOPOLOGICAL_SORT
+extern const SCAN_ORDER av1_default_scan_orders[TX_SIZES];
+extern const SCAN_ORDER av1_scan_orders[TX_SIZES_ALL][TX_TYPES];
 
-// For each coeff_idx in scan[], update its above and left neighbors in
-// neighbors[] accordingly.
-void av1_update_neighbors(TX_SIZE tx_size, const int16_t *scan,
-                          const int16_t *iscan, int16_t *neighbors);
-void av1_init_scan_order(AV1_COMMON *cm);
-void av1_adapt_scan_order(AV1_COMMON *cm);
-#if USE_2X2_PROB
-void av1_down_sample_scan_count(uint32_t *non_zero_count_ds,
-                                const uint32_t *non_zero_count,
-                                TX_SIZE tx_size);
-#endif  // USE_2X2_PROB
-#endif  // CONFIG_ADAPT_SCAN
 void av1_deliver_eob_threshold(const AV1_COMMON *cm, MACROBLOCKD *xd);
 
 static INLINE int get_coef_context(const int16_t *neighbors,
@@ -80,52 +47,12 @@ static INLINE int get_coef_context(const int16_t *neighbors,
 }
 
 static INLINE const SCAN_ORDER *get_default_scan(TX_SIZE tx_size,
-                                                 TX_TYPE tx_type,
-                                                 int is_inter) {
-#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
-  (void)is_inter;
-  return &av1_intra_scan_orders[tx_size][tx_type];
-#endif  // CONFIG_EXT_TX
+                                                 TX_TYPE tx_type) {
+  return &av1_scan_orders[tx_size][tx_type];
 }
 
-static INLINE int do_adapt_scan(TX_SIZE tx_size, TX_TYPE tx_type) {
-  (void)tx_size;
-#if CONFIG_EXT_TX
-  if (tx_size_2d[tx_size] >= 1024 && tx_type != DCT_DCT) return 0;
-  return tx_type < IDTX;
-#else
-  (void)tx_type;
-  return 1;
-#endif
-}
-
-static INLINE const SCAN_ORDER *get_scan(const AV1_COMMON *cm, TX_SIZE tx_size,
-                                         TX_TYPE tx_type,
-                                         const MB_MODE_INFO *mbmi) {
-#if CONFIG_MRC_TX
-  // use the DCT_DCT scan order for MRC_DCT for now
-  if (tx_type == MRC_DCT) tx_type = DCT_DCT;
-#endif  // CONFIG_MRC_TX
-#if CONFIG_LGT_FROM_PRED
-  if (mbmi->use_lgt) tx_type = DCT_DCT;
-#endif
-  const int is_inter = is_inter_block(mbmi);
-#if CONFIG_ADAPT_SCAN
-  (void)mbmi;
-  (void)is_inter;
-#if CONFIG_EXT_TX
-  if (!do_adapt_scan(tx_size, tx_type))
-    return get_default_scan(tx_size, tx_type, is_inter);
-  else
-#endif  // CONFIG_EXT_TX
-    return &cm->fc->sc[tx_size][tx_type];
-#else   // CONFIG_ADAPT_SCAN
-  (void)cm;
-  return get_default_scan(tx_size, tx_type, is_inter);
-#endif  // CONFIG_ADAPT_SCAN
+static INLINE const SCAN_ORDER *get_scan(TX_SIZE tx_size, TX_TYPE tx_type) {
+  return get_default_scan(tx_size, tx_type);
 }
 
 #ifdef __cplusplus