Remove ADAPT_SCAN experiment

This experiment has been abandonned for AV1.

Change-Id: Ib3bb07d62f2025ce50dc9bc1b3f9fc22488519a7

aom_dsp/txfm_common.h

@@ -32,10 +32,7 @@ typedef struct txfm_param {
   // bd==8 implies !is_hbd, but that's not certain right now.
   int is_hbd;
   TxSetType tx_set_type;
-// for inverse transforms only
-#if CONFIG_ADAPT_SCAN
-  const int16_t *eob_threshold;
-#endif
+  // for inverse transforms only
   int eob;
 } TxfmParam;
 

av1/common/blockd.h

@@ -514,10 +514,6 @@ typedef struct RefBuffer {
   struct scale_factors sf;
 } RefBuffer;
 
-#if CONFIG_ADAPT_SCAN
-typedef int16_t EobThresholdMD[TX_TYPES][EOB_THRESHOLD_NUM];
-#endif
-
 #if CONFIG_LOOP_RESTORATION
 typedef struct {
   DECLARE_ALIGNED(16, InterpKernel, vfilter);
@@ -695,9 +691,6 @@ typedef struct macroblockd {
   int prev_delta_lf[FRAME_LF_COUNT];
   int curr_delta_lf[FRAME_LF_COUNT];
 #endif  // CONFIG_LOOPFILTER_LEVEL
-#endif
-#if CONFIG_ADAPT_SCAN
-  const EobThresholdMD *eob_threshold_md;
 #endif
 
   DECLARE_ALIGNED(16, uint8_t, seg_mask[2 * MAX_SB_SQUARE]);

av1/common/common_data.h

@@ -1749,10 +1749,6 @@ static const int intra_mode_context[INTRA_MODES] = {
 };
 #endif
 
-#if CONFIG_ADAPT_SCAN
-#define EOB_THRESHOLD_NUM 2
-#endif
-
 #if CONFIG_JNT_COMP
 // Note: this is also used in unit tests. So whenever one changes the table,
 // the unit tests need to be changed accordingly.

av1/common/entropy.h

@@ -358,14 +358,6 @@ static INLINE int get_entropy_context(TX_SIZE tx_size, const ENTROPY_CONTEXT *a,
 #define COEF_COUNT_SAT_AFTER_KEY 24
 #define COEF_MAX_UPDATE_FACTOR_AFTER_KEY 128
 
-#if CONFIG_ADAPT_SCAN
-#define ADAPT_SCAN_PROB_PRECISION 10
-// 1/8 update rate
-#define ADAPT_SCAN_UPDATE_LOG_RATE 3
-#define ADAPT_SCAN_UPDATE_RATE \
-  (1 << (ADAPT_SCAN_PROB_PRECISION - ADAPT_SCAN_UPDATE_LOG_RATE))
-#endif
-
 static INLINE aom_prob av1_merge_probs(aom_prob pre_prob,
                                        const unsigned int ct[2],
                                        unsigned int count_sat,

av1/common/entropymode.c

@@ -3074,9 +3074,6 @@ void av1_setup_past_independence(AV1_COMMON *cm) {
   av1_init_mv_probs(cm);
 #if CONFIG_LV_MAP
   av1_init_lv_map(cm);
-#endif
-#if CONFIG_ADAPT_SCAN
-  av1_init_scan_order(cm);
 #endif
   av1_convolve_init(cm);
   cm->fc->initialized = 1;

av1/common/entropymode.h

@@ -72,83 +72,9 @@ struct seg_counts {
   unsigned int pred[PREDICTION_PROBS][2];
 };
 
-#if CONFIG_ADAPT_SCAN
-typedef struct NON_ZERO_COUNT {
-  unsigned int non_zero_count_4X4[TX_TYPES][16];
-  unsigned int non_zero_count_8X8[TX_TYPES][64];
-  unsigned int non_zero_count_16X16[TX_TYPES][256];
-  unsigned int non_zero_count_32X32[TX_TYPES][1024];
-
-  unsigned int non_zero_count_4x8[TX_TYPES][32];
-  unsigned int non_zero_count_8x4[TX_TYPES][32];
-  unsigned int non_zero_count_8x16[TX_TYPES][128];
-  unsigned int non_zero_count_16x8[TX_TYPES][128];
-  unsigned int non_zero_count_16x32[TX_TYPES][512];
-  unsigned int non_zero_count_32x16[TX_TYPES][512];
-
-  unsigned int txb_count[TX_SIZES_ALL][TX_TYPES];
-} NON_ZERO_COUNT;
-#endif
-
 typedef struct frame_contexts {
   coeff_cdf_model coef_tail_cdfs[TX_SIZES][PLANE_TYPES];
   coeff_cdf_model coef_head_cdfs[TX_SIZES][PLANE_TYPES];
-#if CONFIG_ADAPT_SCAN
-  struct NON_ZERO_COUNT non_zero_count;
-
-  // TODO(angiebird): try aom_prob
-  uint32_t non_zero_prob_4X4[TX_TYPES][16];
-  uint32_t non_zero_prob_8X8[TX_TYPES][64];
-  uint32_t non_zero_prob_16X16[TX_TYPES][256];
-  uint32_t non_zero_prob_32X32[TX_TYPES][1024];
-
-  uint32_t non_zero_prob_4X8[TX_TYPES][32];
-  uint32_t non_zero_prob_8X4[TX_TYPES][32];
-  uint32_t non_zero_prob_16X8[TX_TYPES][128];
-  uint32_t non_zero_prob_8X16[TX_TYPES][128];
-  uint32_t non_zero_prob_32X16[TX_TYPES][512];
-  uint32_t non_zero_prob_16X32[TX_TYPES][512];
-
-  DECLARE_ALIGNED(16, int16_t, scan_4X4[TX_TYPES][16]);
-  DECLARE_ALIGNED(16, int16_t, scan_8X8[TX_TYPES][64]);
-  DECLARE_ALIGNED(16, int16_t, scan_16X16[TX_TYPES][256]);
-  DECLARE_ALIGNED(16, int16_t, scan_32X32[TX_TYPES][1024]);
-
-  DECLARE_ALIGNED(16, int16_t, scan_4X8[TX_TYPES][32]);
-  DECLARE_ALIGNED(16, int16_t, scan_8X4[TX_TYPES][32]);
-  DECLARE_ALIGNED(16, int16_t, scan_8X16[TX_TYPES][128]);
-  DECLARE_ALIGNED(16, int16_t, scan_16X8[TX_TYPES][128]);
-  DECLARE_ALIGNED(16, int16_t, scan_16X32[TX_TYPES][512]);
-  DECLARE_ALIGNED(16, int16_t, scan_32X16[TX_TYPES][512]);
-
-  DECLARE_ALIGNED(16, int16_t, iscan_4X4[TX_TYPES][16]);
-  DECLARE_ALIGNED(16, int16_t, iscan_8X8[TX_TYPES][64]);
-  DECLARE_ALIGNED(16, int16_t, iscan_16X16[TX_TYPES][256]);
-  DECLARE_ALIGNED(16, int16_t, iscan_32X32[TX_TYPES][1024]);
-
-  DECLARE_ALIGNED(16, int16_t, iscan_4X8[TX_TYPES][32]);
-  DECLARE_ALIGNED(16, int16_t, iscan_8X4[TX_TYPES][32]);
-  DECLARE_ALIGNED(16, int16_t, iscan_8X16[TX_TYPES][128]);
-  DECLARE_ALIGNED(16, int16_t, iscan_16X8[TX_TYPES][128]);
-  DECLARE_ALIGNED(16, int16_t, iscan_16X32[TX_TYPES][512]);
-  DECLARE_ALIGNED(16, int16_t, iscan_32X16[TX_TYPES][512]);
-
-  int16_t nb_4X4[TX_TYPES][(16 + 1) * 2];
-  int16_t nb_8X8[TX_TYPES][(64 + 1) * 2];
-  int16_t nb_16X16[TX_TYPES][(256 + 1) * 2];
-  int16_t nb_32X32[TX_TYPES][(1024 + 1) * 2];
-
-  int16_t nb_4X8[TX_TYPES][(32 + 1) * 2];
-  int16_t nb_8X4[TX_TYPES][(32 + 1) * 2];
-  int16_t nb_8X16[TX_TYPES][(128 + 1) * 2];
-  int16_t nb_16X8[TX_TYPES][(128 + 1) * 2];
-  int16_t nb_16X32[TX_TYPES][(512 + 1) * 2];
-  int16_t nb_32X16[TX_TYPES][(512 + 1) * 2];
-
-  SCAN_ORDER sc[TX_SIZES_ALL][TX_TYPES];
-
-  int16_t eob_threshold[TX_SIZES_ALL][TX_TYPES][EOB_THRESHOLD_NUM];
-#endif  // CONFIG_ADAPT_SCAN
 
 #if CONFIG_LV_MAP
   aom_prob txb_skip[TX_SIZES][TXB_SKIP_CONTEXTS];

av1/common/idct.c

@@ -1808,18 +1808,14 @@ void av1_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
 #if !CONFIG_DAALA_TX8
 static void idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride,
                         const TxfmParam *txfm_param) {
-// If dc is 1, then input[0] is the reconstructed value, do not need
-// dequantization. Also, when dc is 1, dc is counted in eobs, namely eobs >=1.
-
-// The calculation can be simplified if there are not many non-zero dct
-// coefficients. Use eobs to decide what to do.
-// TODO(yunqingwang): "eobs = 1" case is also handled in av1_short_idct8x8_c.
-// Combine that with code here.
-#if CONFIG_ADAPT_SCAN
-  const int16_t half = txfm_param->eob_threshold[0];
-#else
+  // If dc is 1, then input[0] is the reconstructed value, do not need
+  // dequantization. Also, when dc is 1, dc is counted in eobs, namely eobs >=1.
+
+  // The calculation can be simplified if there are not many non-zero dct
+  // coefficients. Use eobs to decide what to do.
+  // TODO(yunqingwang): "eobs = 1" case is also handled in av1_short_idct8x8_c.
+  // Combine that with code here.
   const int16_t half = 12;
-#endif
 
   const int eob = txfm_param->eob;
   if (eob == 1)
@@ -1835,15 +1831,10 @@ static void idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride,
 #if !CONFIG_DAALA_TX16
 static void idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride,
                           const TxfmParam *txfm_param) {
-// The calculation can be simplified if there are not many non-zero dct
-// coefficients. Use eobs to separate different cases.
-#if CONFIG_ADAPT_SCAN
-  const int16_t half = txfm_param->eob_threshold[0];
-  const int16_t quarter = txfm_param->eob_threshold[1];
-#else
+  // The calculation can be simplified if there are not many non-zero dct
+  // coefficients. Use eobs to separate different cases.
   const int16_t half = 38;
   const int16_t quarter = 10;
-#endif
 
   const int eob = txfm_param->eob;
   if (eob == 1) /* DC only DCT coefficient. */
@@ -1860,13 +1851,8 @@ static void idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride,
 #if !CONFIG_DAALA_TX32
 static void idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride,
                           const TxfmParam *txfm_param) {
-#if CONFIG_ADAPT_SCAN
-  const int16_t half = txfm_param->eob_threshold[0];
-  const int16_t quarter = txfm_param->eob_threshold[1];
-#else
   const int16_t half = 135;
   const int16_t quarter = 34;
-#endif
 
   const int eob = txfm_param->eob;
   if (eob == 1)
@@ -2556,10 +2542,6 @@ static void init_txfm_param(const MACROBLOCKD *xd, int plane, TX_SIZE tx_size,
   txfm_param->tx_set_type =
       get_ext_tx_set_type(txfm_param->tx_size, plane_bsize,
                           is_inter_block(&xd->mi[0]->mbmi), reduced_tx_set);
-#if CONFIG_ADAPT_SCAN
-  txfm_param->eob_threshold =
-      (const int16_t *)&xd->eob_threshold_md[tx_size][tx_type][0];
-#endif
 }
 
 typedef void (*InvTxfmFunc)(const tran_low_t *dqcoeff, uint8_t *dst, int stride,

av1/common/onyxc_int.h

@@ -566,9 +566,6 @@ typedef struct AV1Common {
 #if CONFIG_LV_MAP
   LV_MAP_CTX_TABLE coeff_ctx_table;
 #endif
-#if CONFIG_ADAPT_SCAN
-  int use_adapt_scan;
-#endif
 #if CONFIG_MFMV
   TPL_MV_REF *tpl_mvs;
   // TODO(jingning): This can be combined with sign_bias later.

av1/common/scan.h

@@ -29,54 +29,6 @@ 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 0
-#define CACHE_SCAN_PROB 1
-#define REDUCED_SET 1
-#define SUB_REGION_COUNT 1
-#define SUB_FRAME_COUNT 0
-#define SIG_REGION 0
-#define UNI_RECT 1
-#define USE_TOPOLOGICAL_SORT 0
-#define USE_LIMIT_SCAN_DISTANCE 0
-void av1_update_scan_count_facade(const AV1_COMMON *const cm, MACROBLOCKD *xd,
-                                  int mi_row, 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);
-
-#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
-
-// 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, FRAME_CONTEXT *ec_ctxs[],
-                          int num_tiles);
-#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,
@@ -97,15 +49,6 @@ static INLINE int do_adapt_scan(TX_SIZE tx_size, TX_TYPE tx_type) {
   (void)tx_size;
   if (tx_size_2d[tx_size] >= 1024 && tx_type != DCT_DCT) return 0;
   if (tx_size > TX_32X16) return 0;
-#if CONFIG_ADAPT_SCAN
-#if REDUCED_SET
-  const int txw = tx_size_wide[tx_size];
-  const int txh = tx_size_high[tx_size];
-
-  if (txw == 16 && txh == 16) return tx_type == DCT_DCT;
-  if (txw >= 16 || txh >= 16) return tx_type <= ADST_ADST;
-#endif
-#endif
   return tx_type < IDTX;
 }
 
@@ -113,17 +56,8 @@ static INLINE const SCAN_ORDER *get_scan(const AV1_COMMON *cm, TX_SIZE tx_size,
                                          TX_TYPE tx_type,
                                          const MB_MODE_INFO *mbmi) {
   const int is_inter = is_inter_block(mbmi);
-#if CONFIG_ADAPT_SCAN
-  (void)mbmi;
-  (void)is_inter;
-  if (!do_adapt_scan(tx_size, tx_type))
-    return get_default_scan(tx_size, tx_type, is_inter);
-  else
-    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
 }
 
 #ifdef __cplusplus

av1/decoder/decodeframe.c

@@ -3062,18 +3062,6 @@ static size_t read_uncompressed_header(AV1Decoder *pbi,
 
   cm->reduced_tx_set_used = aom_rb_read_bit(rb);
 
-#if CONFIG_ADAPT_SCAN
-#if CONFIG_EXT_TILE
-  if (cm->large_scale_tile)
-    cm->use_adapt_scan = 0;
-  else
-#endif  // CONFIG_EXT_TILE
-    cm->use_adapt_scan = aom_rb_read_bit(rb);
-  // TODO(angiebird): call av1_init_scan_order only when use_adapt_scan
-  // switches from 1 to 0
-  if (cm->use_adapt_scan == 0) av1_init_scan_order(cm);
-#endif  // CONFIG_ADAPT_SCAN
-
 #if !CONFIG_TEMPMV_SIGNALING
   // NOTE(zoeliu): As cm->prev_frame can take neither a frame of
   //               show_exisiting_frame=1, nor can it take a frame not used as
@@ -3273,9 +3261,6 @@ size_t av1_decode_frame_headers_and_setup(AV1Decoder *pbi, const uint8_t *data,
   RefBuffer *last_fb_ref_buf = &cm->frame_refs[LAST_FRAME - LAST_FRAME];
 #endif
 
-#if CONFIG_ADAPT_SCAN
-  av1_deliver_eob_threshold(cm, xd);
-#endif
 #if CONFIG_BITSTREAM_DEBUG
   bitstream_queue_set_frame_read(cm->current_video_frame * 2 + cm->show_frame);
 #endif
@@ -3561,9 +3546,6 @@ void av1_decode_tg_tiles_and_wrapup(AV1Decoder *pbi, const uint8_t *data,
                                   num_bwd_ctxs);
       av1_average_tile_loopfilter_cdfs(pbi->common.fc, tile_ctxs, cdf_ptrs,
                                        num_bwd_ctxs);
-#if CONFIG_ADAPT_SCAN
-      av1_adapt_scan_order(cm, tile_ctxs, num_bwd_ctxs);
-#endif  // CONFIG_ADAPT_SCAN
 
       if (!frame_is_intra_only(cm)) {
         av1_adapt_inter_frame_probs(cm);

av1/decoder/decodetxb.c

@@ -409,15 +409,6 @@ uint8_t av1_read_coeffs_txb_facade(const AV1_COMMON *const cm,
               pd->left_context + row, &txb_ctx);
   uint8_t cul_level = av1_read_coeffs_txb(cm, xd, r, row, col, plane, &txb_ctx,
                                           tx_size, max_scan_line, eob);
-#if CONFIG_ADAPT_SCAN
-  PLANE_TYPE plane_type = get_plane_type(plane);
-  TX_TYPE tx_type = av1_get_tx_type(plane_type, xd, row, col, tx_size);
-  const int mi_row = -xd->mb_to_top_edge >> (3 + MI_SIZE_LOG2);
-
-  if (xd->counts && *eob > 0)
-    av1_update_scan_count_facade(cm, xd, mi_row, tx_size, tx_type, pd->dqcoeff,
-                                 *eob);
-#endif
   av1_set_contexts(xd, pd, plane, tx_size, cul_level, col, row);
   return cul_level;
 }

av1/decoder/detokenize.c

@@ -311,14 +311,6 @@ int av1_decode_block_tokens(AV1_COMMON *cm, MACROBLOCKD *const xd, int plane,
 #endif  // CONFIG_NEW_QUANT
                    ctx, sc->scan, sc->neighbors, max_scan_line, r);
   av1_set_contexts(xd, pd, plane, tx_size, eob > 0, x, y);
-#if CONFIG_ADAPT_SCAN
-  const int mi_row = -xd->mb_to_top_edge >> (3 + MI_SIZE_LOG2);
-
-  if (xd->counts)
-    av1_update_scan_count_facade(cm, xd, mi_row, tx_size, tx_type, pd->dqcoeff,
-                                 eob);
-#else
   (void)cm;
-#endif
   return eob;
 }

av1/encoder/bitstream.c

@@ -3896,15 +3896,6 @@ static void write_uncompressed_header_frame(AV1_COMP *cpi,
 
   aom_wb_write_bit(wb, cm->reduced_tx_set_used);
 
-#if CONFIG_ADAPT_SCAN
-#if CONFIG_EXT_TILE
-  if (cm->large_scale_tile)
-    assert(cm->use_adapt_scan == 0);
-  else
-#endif  // CONFIG_EXT_TILE
-    aom_wb_write_bit(wb, cm->use_adapt_scan);
-#endif
-
   if (!frame_is_intra_only(cm)) write_global_motion(cpi, wb);
 
   write_tile_info(cm, wb);

av1/encoder/encodeframe.c

@@ -3697,10 +3697,6 @@ static void encode_frame_internal(AV1_COMP *cpi) {
   int i;
   const int last_fb_buf_idx = get_ref_frame_buf_idx(cpi, LAST_FRAME);
 
-#if CONFIG_ADAPT_SCAN
-  av1_deliver_eob_threshold(cm, xd);
-#endif
-
   x->min_partition_size = AOMMIN(x->min_partition_size, cm->sb_size);
   x->max_partition_size = AOMMIN(x->max_partition_size, cm->sb_size);
 #if CONFIG_DIST_8X8
@@ -4094,17 +4090,6 @@ void av1_encode_frame(AV1_COMP *cpi) {
   // Indicates whether or not to use a default reduced set for ext-tx
   // rather than the potential full set of 16 transforms
   cm->reduced_tx_set_used = 0;
-#if CONFIG_ADAPT_SCAN
-#if CONFIG_EXT_TILE
-  if (cm->large_scale_tile)
-    cm->use_adapt_scan = 0;
-  else
-#endif  // CONFIG_EXT_TILE
-    cm->use_adapt_scan = 1;
-  // TODO(angiebird): call av1_init_scan_order only when use_adapt_scan
-  // switches from 1 to 0
-  if (cm->use_adapt_scan == 0) av1_init_scan_order(cm);
-#endif
 
 #if CONFIG_FRAME_MARKER
   if (cm->show_frame == 0) {

av1/encoder/encoder.c

@@ -6371,9 +6371,6 @@ static void encode_frame_to_data_rate(AV1_COMP *cpi, size_t *size,
                                 num_bwd_ctxs);
     av1_average_tile_loopfilter_cdfs(cpi->common.fc, tile_ctxs, cdf_ptrs,
                                      num_bwd_ctxs);
-#if CONFIG_ADAPT_SCAN
-    av1_adapt_scan_order(cm, tile_ctxs, num_bwd_ctxs);
-#endif  // CONFIG_ADAPT_SCAN
   }
 
   if (!frame_is_intra_only(cm)) {

av1/encoder/encodetxb.c

@@ -523,11 +523,6 @@ void av1_write_coeffs_txb(const AV1_COMMON *const cm, MACROBLOCKD *xd,
                    abs(tcoeff[pos]) - COEFF_BASE_RANGE - 1 - NUM_BASE_LEVELS);
     }
   }
-
-#if CONFIG_ADAPT_SCAN
-  const int mi_row = -xd->mb_to_top_edge >> (3 + MI_SIZE_LOG2);
-  av1_update_scan_count_facade(cm, xd, mi_row, tx_size, tx_type, tcoeff, eob);
-#endif
 }
 
 typedef struct encode_txb_args {
@@ -2306,16 +2301,6 @@ void av1_update_and_record_txb_context(int plane, int block, int blk_row,
 
   int cul_level = av1_get_txb_entropy_context(tcoeff, scan_order, eob);
   av1_set_contexts(xd, pd, plane, tx_size, cul_level, blk_col, blk_row);
-
-#if CONFIG_ADAPT_SCAN
-  // Since dqcoeff is not available here, we pass qcoeff into
-  // av1_update_scan_count_facade(). The update behavior should be the same
-  // because av1_update_scan_count_facade() only cares if coefficients are zero
-  // or not.
-  const int mi_row = -xd->mb_to_top_edge >> (3 + MI_SIZE_LOG2);
-  av1_update_scan_count_facade((AV1_COMMON *)cm, xd, mi_row, tx_size, tx_type,
-                               qcoeff, eob);
-#endif
 }
 
 void av1_update_txb_context(const AV1_COMP *cpi, ThreadData *td,

av1/encoder/firstpass.c

@@ -587,10 +587,6 @@ void av1_first_pass(AV1_COMP *cpi, const struct lookahead_entry *source) {
   av1_init_mv_probs(cm);
 #if CONFIG_LV_MAP
   av1_init_lv_map(cm);
-#endif
-#if CONFIG_ADAPT_SCAN
-  av1_init_scan_order(cm);
-  av1_deliver_eob_threshold(cm, xd);
 #endif
   av1_convolve_init(cm);
   av1_initialize_rd_consts(cpi);

av1/encoder/tokenize.c

@@ -468,16 +468,6 @@ static void tokenize_b(int plane, int block, int blk_row, int blk_col,
 
   *tp = t;
 
-#if CONFIG_ADAPT_SCAN
-  // Since dqcoeff is not available here, we pass qcoeff into
-  // av1_update_scan_count_facade(). The update behavior should be the same
-  // because av1_update_scan_count_facade() only cares if coefficients are zero
-  // or not.
-  const int mi_row = -xd->mb_to_top_edge >> (3 + MI_SIZE_LOG2);
-  av1_update_scan_count_facade((AV1_COMMON *)cm, xd, mi_row, tx_size, tx_type,
-                               qcoeff, c);
-#endif
-
   av1_set_contexts(xd, pd, plane, tx_size, c > 0, blk_col, blk_row);
 }
 

build/cmake/aom_config_defaults.cmake

@@ -106,7 +106,6 @@ set(CONFIG_SPATIAL_RESAMPLING 1 CACHE NUMBER "Spatial resampling.")
 set(CONFIG_SYMBOLRATE 0 CACHE NUMBER "Enables symbol rate accounting.")
 
 # AV1 experiment flags.
-set(CONFIG_ADAPT_SCAN 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_ADD_4BYTES_OBUSIZE 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_AMVR 0 CACHE NUMBER "AV1 experiment flag.")
 set(CONFIG_AOM_QM 1 CACHE NUMBER "AV1 experiment flag.")