1 files changed, 429 insertions, 0 deletions

diff --git a/third_party/aom/av1/encoder/mv_prec.c b/third_party/aom/av1/encoder/mv_prec.c
new file mode 100644
index 0000000000..b64f4dcd0e
--- /dev/null
+++ b/third_party/aom/av1/encoder/mv_prec.c
@@ -0,0 +1,429 @@
+/*
+ * Copyright (c) 2019, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include "config/aom_config.h"
+
+#include "av1/encoder/encodemv.h"
+#if !CONFIG_REALTIME_ONLY
+#include "av1/encoder/misc_model_weights.h"
+#endif  // !CONFIG_REALTIME_ONLY
+#include "av1/encoder/mv_prec.h"
+
+#if !CONFIG_REALTIME_ONLY
+static AOM_INLINE int_mv get_ref_mv_for_mv_stats(
+    const MB_MODE_INFO *mbmi, const MB_MODE_INFO_EXT_FRAME *mbmi_ext_frame,
+    int ref_idx) {
+  int ref_mv_idx = mbmi->ref_mv_idx;
+  if (mbmi->mode == NEAR_NEWMV || mbmi->mode == NEW_NEARMV) {
+    assert(has_second_ref(mbmi));
+    ref_mv_idx += 1;
+  }
+
+  const MV_REFERENCE_FRAME *ref_frames = mbmi->ref_frame;
+  const int8_t ref_frame_type = av1_ref_frame_type(ref_frames);
+  const CANDIDATE_MV *curr_ref_mv_stack = mbmi_ext_frame->ref_mv_stack;
+
+  if (ref_frames[1] > INTRA_FRAME) {
+    assert(ref_idx == 0 || ref_idx == 1);
+    return ref_idx ? curr_ref_mv_stack[ref_mv_idx].comp_mv
+                   : curr_ref_mv_stack[ref_mv_idx].this_mv;
+  }
+
+  assert(ref_idx == 0);
+  return ref_mv_idx < mbmi_ext_frame->ref_mv_count
+             ? curr_ref_mv_stack[ref_mv_idx].this_mv
+             : mbmi_ext_frame->global_mvs[ref_frame_type];
+}
+
+static AOM_INLINE int get_symbol_cost(const aom_cdf_prob *cdf, int symbol) {
+  const aom_cdf_prob cur_cdf = AOM_ICDF(cdf[symbol]);
+  const aom_cdf_prob prev_cdf = symbol ? AOM_ICDF(cdf[symbol - 1]) : 0;
+  const aom_cdf_prob p15 = AOMMAX(cur_cdf - prev_cdf, EC_MIN_PROB);
+
+  return av1_cost_symbol(p15);
+}
+
+static AOM_INLINE int keep_one_comp_stat(MV_STATS *mv_stats, int comp_val,
+                                         int comp_idx, const AV1_COMP *cpi,
+                                         int *rates) {
+  assert(comp_val != 0 && "mv component should not have zero value!");
+  const int sign = comp_val < 0;
+  const int mag = sign ? -comp_val : comp_val;
+  const int mag_minus_1 = mag - 1;
+  int offset;
+  const int mv_class = av1_get_mv_class(mag_minus_1, &offset);
+  const int int_part = offset >> 3;         // int mv data
+  const int frac_part = (offset >> 1) & 3;  // fractional mv data
+  const int high_part = offset & 1;         // high precision mv data
+  const int use_hp = cpi->common.features.allow_high_precision_mv;
+  int r_idx = 0;
+
+  const MACROBLOCK *const x = &cpi->td.mb;
+  const MACROBLOCKD *const xd = &x->e_mbd;
+  FRAME_CONTEXT *ec_ctx = xd->tile_ctx;
+  nmv_context *nmvc = &ec_ctx->nmvc;
+  nmv_component *mvcomp_ctx = nmvc->comps;
+  nmv_component *cur_mvcomp_ctx = &mvcomp_ctx[comp_idx];
+  aom_cdf_prob *sign_cdf = cur_mvcomp_ctx->sign_cdf;
+  aom_cdf_prob *class_cdf = cur_mvcomp_ctx->classes_cdf;
+  aom_cdf_prob *class0_cdf = cur_mvcomp_ctx->class0_cdf;
+  aom_cdf_prob(*bits_cdf)[3] = cur_mvcomp_ctx->bits_cdf;
+  aom_cdf_prob *frac_part_cdf = mv_class
+                                    ? (cur_mvcomp_ctx->fp_cdf)
+                                    : (cur_mvcomp_ctx->class0_fp_cdf[int_part]);
+  aom_cdf_prob *high_part_cdf =
+      mv_class ? (cur_mvcomp_ctx->hp_cdf) : (cur_mvcomp_ctx->class0_hp_cdf);
+
+  const int sign_rate = get_symbol_cost(sign_cdf, sign);
+  rates[r_idx++] = sign_rate;
+  update_cdf(sign_cdf, sign, 2);
+
+  const int class_rate = get_symbol_cost(class_cdf, mv_class);
+  rates[r_idx++] = class_rate;
+  update_cdf(class_cdf, mv_class, MV_CLASSES);
+
+  int int_bit_rate = 0;
+  if (mv_class == MV_CLASS_0) {
+    int_bit_rate = get_symbol_cost(class0_cdf, int_part);
+    update_cdf(class0_cdf, int_part, CLASS0_SIZE);
+  } else {
+    const int n = mv_class + CLASS0_BITS - 1;  // number of bits
+    for (int i = 0; i < n; ++i) {
+      int_bit_rate += get_symbol_cost(bits_cdf[i], (int_part >> i) & 1);
+      update_cdf(bits_cdf[i], (int_part >> i) & 1, 2);
+    }
+  }
+  rates[r_idx++] = int_bit_rate;
+  const int frac_part_rate = get_symbol_cost(frac_part_cdf, frac_part);
+  rates[r_idx++] = frac_part_rate;
+  update_cdf(frac_part_cdf, frac_part, MV_FP_SIZE);
+  const int high_part_rate =
+      use_hp ? get_symbol_cost(high_part_cdf, high_part) : 0;
+  if (use_hp) {
+    update_cdf(high_part_cdf, high_part, 2);
+  }
+  rates[r_idx++] = high_part_rate;
+
+  mv_stats->last_bit_zero += !high_part;
+  mv_stats->last_bit_nonzero += high_part;
+  const int total_rate =
+      (sign_rate + class_rate + int_bit_rate + frac_part_rate + high_part_rate);
+  return total_rate;
+}
+
+static AOM_INLINE void keep_one_mv_stat(MV_STATS *mv_stats, const MV *ref_mv,
+                                        const MV *cur_mv, const AV1_COMP *cpi) {
+  const MACROBLOCK *const x = &cpi->td.mb;
+  const MACROBLOCKD *const xd = &x->e_mbd;
+  FRAME_CONTEXT *ec_ctx = xd->tile_ctx;
+  nmv_context *nmvc = &ec_ctx->nmvc;
+  aom_cdf_prob *joint_cdf = nmvc->joints_cdf;
+  const int use_hp = cpi->common.features.allow_high_precision_mv;
+
+  const MV diff = { cur_mv->row - ref_mv->row, cur_mv->col - ref_mv->col };
+  const int mv_joint = av1_get_mv_joint(&diff);
+  // TODO(chiyotsai@google.com): Estimate hp_diff when we are using lp
+  const MV hp_diff = diff;
+  const int hp_mv_joint = av1_get_mv_joint(&hp_diff);
+  const MV truncated_diff = { (diff.row / 2) * 2, (diff.col / 2) * 2 };
+  const MV lp_diff = use_hp ? truncated_diff : diff;
+  const int lp_mv_joint = av1_get_mv_joint(&lp_diff);
+
+  const int mv_joint_rate = get_symbol_cost(joint_cdf, mv_joint);
+  const int hp_mv_joint_rate = get_symbol_cost(joint_cdf, hp_mv_joint);
+  const int lp_mv_joint_rate = get_symbol_cost(joint_cdf, lp_mv_joint);
+
+  update_cdf(joint_cdf, mv_joint, MV_JOINTS);
+
+  mv_stats->total_mv_rate += mv_joint_rate;
+  mv_stats->hp_total_mv_rate += hp_mv_joint_rate;
+  mv_stats->lp_total_mv_rate += lp_mv_joint_rate;
+  mv_stats->mv_joint_count[mv_joint]++;
+
+  for (int comp_idx = 0; comp_idx < 2; comp_idx++) {
+    const int comp_val = comp_idx ? diff.col : diff.row;
+    const int hp_comp_val = comp_idx ? hp_diff.col : hp_diff.row;
+    const int lp_comp_val = comp_idx ? lp_diff.col : lp_diff.row;
+    int rates[5];
+    av1_zero_array(rates, 5);
+
+    const int comp_rate =
+        comp_val ? keep_one_comp_stat(mv_stats, comp_val, comp_idx, cpi, rates)
+                 : 0;
+    // TODO(chiyotsai@google.com): Properly get hp rate when use_hp is false
+    const int hp_rate =
+        hp_comp_val ? rates[0] + rates[1] + rates[2] + rates[3] + rates[4] : 0;
+    const int lp_rate =
+        lp_comp_val ? rates[0] + rates[1] + rates[2] + rates[3] : 0;
+
+    mv_stats->total_mv_rate += comp_rate;
+    mv_stats->hp_total_mv_rate += hp_rate;
+    mv_stats->lp_total_mv_rate += lp_rate;
+  }
+}
+
+static AOM_INLINE void collect_mv_stats_b(MV_STATS *mv_stats,
+                                          const AV1_COMP *cpi, int mi_row,
+                                          int mi_col) {
+  const AV1_COMMON *cm = &cpi->common;
+  const CommonModeInfoParams *const mi_params = &cm->mi_params;
+
+  if (mi_row >= mi_params->mi_rows || mi_col >= mi_params->mi_cols) {
+    return;
+  }
+
+  const MB_MODE_INFO *mbmi =
+      mi_params->mi_grid_base[mi_row * mi_params->mi_stride + mi_col];
+  const MB_MODE_INFO_EXT_FRAME *mbmi_ext_frame =
+      cpi->mbmi_ext_info.frame_base +
+      get_mi_ext_idx(mi_row, mi_col, cm->mi_params.mi_alloc_bsize,
+                     cpi->mbmi_ext_info.stride);
+
+  if (!is_inter_block(mbmi)) {
+    mv_stats->intra_count++;
+    return;
+  }
+  mv_stats->inter_count++;
+
+  const PREDICTION_MODE mode = mbmi->mode;
+  const int is_compound = has_second_ref(mbmi);
+
+  if (mode == NEWMV || mode == NEW_NEWMV) {
+    // All mvs are new
+    for (int ref_idx = 0; ref_idx < 1 + is_compound; ++ref_idx) {
+      const MV ref_mv =
+          get_ref_mv_for_mv_stats(mbmi, mbmi_ext_frame, ref_idx).as_mv;
+      const MV cur_mv = mbmi->mv[ref_idx].as_mv;
+      keep_one_mv_stat(mv_stats, &ref_mv, &cur_mv, cpi);
+    }
+  } else if (mode == NEAREST_NEWMV || mode == NEAR_NEWMV ||
+             mode == NEW_NEARESTMV || mode == NEW_NEARMV) {
+    // has exactly one new_mv
+    mv_stats->default_mvs += 1;
+
+    const int ref_idx = (mode == NEAREST_NEWMV || mode == NEAR_NEWMV);
+    const MV ref_mv =
+        get_ref_mv_for_mv_stats(mbmi, mbmi_ext_frame, ref_idx).as_mv;
+    const MV cur_mv = mbmi->mv[ref_idx].as_mv;
+
+    keep_one_mv_stat(mv_stats, &ref_mv, &cur_mv, cpi);
+  } else {
+    // No new_mv
+    mv_stats->default_mvs += 1 + is_compound;
+  }
+
+  // Add texture information
+  const BLOCK_SIZE bsize = mbmi->bsize;
+  const int num_rows = block_size_high[bsize];
+  const int num_cols = block_size_wide[bsize];
+  const int y_stride = cpi->source->y_stride;
+  const int px_row = 4 * mi_row, px_col = 4 * mi_col;
+  const int buf_is_hbd = cpi->source->flags & YV12_FLAG_HIGHBITDEPTH;
+  const int bd = cm->seq_params->bit_depth;
+  if (buf_is_hbd) {
+    uint16_t *source_buf =
+        CONVERT_TO_SHORTPTR(cpi->source->y_buffer) + px_row * y_stride + px_col;
+    for (int row = 0; row < num_rows - 1; row++) {
+      for (int col = 0; col < num_cols - 1; col++) {
+        const int offset = row * y_stride + col;
+        const int horz_diff =
+            abs(source_buf[offset + 1] - source_buf[offset]) >> (bd - 8);
+        const int vert_diff =
+            abs(source_buf[offset + y_stride] - source_buf[offset]) >> (bd - 8);
+        mv_stats->horz_text += horz_diff;
+        mv_stats->vert_text += vert_diff;
+        mv_stats->diag_text += horz_diff * vert_diff;
+      }
+    }
+  } else {
+    uint8_t *source_buf = cpi->source->y_buffer + px_row * y_stride + px_col;
+    for (int row = 0; row < num_rows - 1; row++) {
+      for (int col = 0; col < num_cols - 1; col++) {
+        const int offset = row * y_stride + col;
+        const int horz_diff = abs(source_buf[offset + 1] - source_buf[offset]);
+        const int vert_diff =
+            abs(source_buf[offset + y_stride] - source_buf[offset]);
+        mv_stats->horz_text += horz_diff;
+        mv_stats->vert_text += vert_diff;
+        mv_stats->diag_text += horz_diff * vert_diff;
+      }
+    }
+  }
+}
+
+// Split block
+static AOM_INLINE void collect_mv_stats_sb(MV_STATS *mv_stats,
+                                           const AV1_COMP *cpi, int mi_row,
+                                           int mi_col, BLOCK_SIZE bsize) {
+  assert(bsize < BLOCK_SIZES_ALL);
+  const AV1_COMMON *cm = &cpi->common;
+
+  if (mi_row >= cm->mi_params.mi_rows || mi_col >= cm->mi_params.mi_cols)
+    return;
+
+  const PARTITION_TYPE partition = get_partition(cm, mi_row, mi_col, bsize);
+  const BLOCK_SIZE subsize = get_partition_subsize(bsize, partition);
+
+  const int hbs = mi_size_wide[bsize] / 2;
+  const int qbs = mi_size_wide[bsize] / 4;
+  switch (partition) {
+    case PARTITION_NONE:
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col);
+      break;
+    case PARTITION_HORZ:
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row + hbs, mi_col);
+      break;
+    case PARTITION_VERT:
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col + hbs);
+      break;
+    case PARTITION_SPLIT:
+      collect_mv_stats_sb(mv_stats, cpi, mi_row, mi_col, subsize);
+      collect_mv_stats_sb(mv_stats, cpi, mi_row, mi_col + hbs, subsize);
+      collect_mv_stats_sb(mv_stats, cpi, mi_row + hbs, mi_col, subsize);
+      collect_mv_stats_sb(mv_stats, cpi, mi_row + hbs, mi_col + hbs, subsize);
+      break;
+    case PARTITION_HORZ_A:
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col + hbs);
+      collect_mv_stats_b(mv_stats, cpi, mi_row + hbs, mi_col);
+      break;
+    case PARTITION_HORZ_B:
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row + hbs, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row + hbs, mi_col + hbs);
+      break;
+    case PARTITION_VERT_A:
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row + hbs, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col + hbs);
+      break;
+    case PARTITION_VERT_B:
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col);
+      collect_mv_stats_b(mv_stats, cpi, mi_row, mi_col + hbs);
+      collect_mv_stats_b(mv_stats, cpi, mi_row + hbs, mi_col + hbs);
+      break;
+    case PARTITION_HORZ_4:
+      for (int i = 0; i < 4; ++i) {
+        const int this_mi_row = mi_row + i * qbs;
+        collect_mv_stats_b(mv_stats, cpi, this_mi_row, mi_col);
+      }
+      break;
+    case PARTITION_VERT_4:
+      for (int i = 0; i < 4; ++i) {
+        const int this_mi_col = mi_col + i * qbs;
+        collect_mv_stats_b(mv_stats, cpi, mi_row, this_mi_col);
+      }
+      break;
+    default: assert(0);
+  }
+}
+
+static AOM_INLINE void collect_mv_stats_tile(MV_STATS *mv_stats,
+                                             const AV1_COMP *cpi,
+                                             const TileInfo *tile_info) {
+  const AV1_COMMON *cm = &cpi->common;
+  const int mi_row_start = tile_info->mi_row_start;
+  const int mi_row_end = tile_info->mi_row_end;
+  const int mi_col_start = tile_info->mi_col_start;
+  const int mi_col_end = tile_info->mi_col_end;
+  const int sb_size_mi = cm->seq_params->mib_size;
+  BLOCK_SIZE sb_size = cm->seq_params->sb_size;
+  for (int mi_row = mi_row_start; mi_row < mi_row_end; mi_row += sb_size_mi) {
+    for (int mi_col = mi_col_start; mi_col < mi_col_end; mi_col += sb_size_mi) {
+      collect_mv_stats_sb(mv_stats, cpi, mi_row, mi_col, sb_size);
+    }
+  }
+}
+
+void av1_collect_mv_stats(AV1_COMP *cpi, int current_q) {
+  MV_STATS *mv_stats = &cpi->mv_stats;
+  const AV1_COMMON *cm = &cpi->common;
+  const int tile_cols = cm->tiles.cols;
+  const int tile_rows = cm->tiles.rows;
+
+  for (int tile_row = 0; tile_row < tile_rows; tile_row++) {
+    TileInfo tile_info;
+    av1_tile_set_row(&tile_info, cm, tile_row);
+    for (int tile_col = 0; tile_col < tile_cols; tile_col++) {
+      const int tile_idx = tile_row * tile_cols + tile_col;
+      av1_tile_set_col(&tile_info, cm, tile_col);
+      cpi->tile_data[tile_idx].tctx = *cm->fc;
+      cpi->td.mb.e_mbd.tile_ctx = &cpi->tile_data[tile_idx].tctx;
+      collect_mv_stats_tile(mv_stats, cpi, &tile_info);
+    }
+  }
+
+  mv_stats->q = current_q;
+  mv_stats->order = cpi->common.current_frame.order_hint;
+  mv_stats->valid = 1;
+}
+
+static AOM_INLINE int get_smart_mv_prec(AV1_COMP *cpi, const MV_STATS *mv_stats,
+                                        int current_q) {
+  const AV1_COMMON *cm = &cpi->common;
+  const int order_hint = cpi->common.current_frame.order_hint;
+  const int order_diff = order_hint - mv_stats->order;
+  const float area = (float)(cm->width * cm->height);
+  float features[MV_PREC_FEATURE_SIZE] = {
+    (float)current_q,
+    (float)mv_stats->q,
+    (float)order_diff,
+    mv_stats->inter_count / area,
+    mv_stats->intra_count / area,
+    mv_stats->default_mvs / area,
+    mv_stats->mv_joint_count[0] / area,
+    mv_stats->mv_joint_count[1] / area,
+    mv_stats->mv_joint_count[2] / area,
+    mv_stats->mv_joint_count[3] / area,
+    mv_stats->last_bit_zero / area,
+    mv_stats->last_bit_nonzero / area,
+    mv_stats->total_mv_rate / area,
+    mv_stats->hp_total_mv_rate / area,
+    mv_stats->lp_total_mv_rate / area,
+    mv_stats->horz_text / area,
+    mv_stats->vert_text / area,
+    mv_stats->diag_text / area,
+  };
+
+  for (int f_idx = 0; f_idx < MV_PREC_FEATURE_SIZE; f_idx++) {
+    features[f_idx] =
+        (features[f_idx] - av1_mv_prec_mean[f_idx]) / av1_mv_prec_std[f_idx];
+  }
+  float score = 0.0f;
+
+  av1_nn_predict(features, &av1_mv_prec_dnn_config, 1, &score);
+
+  const int use_high_hp = score >= 0.0f;
+  return use_high_hp;
+}
+#endif  // !CONFIG_REALTIME_ONLY
+
+void av1_pick_and_set_high_precision_mv(AV1_COMP *cpi, int qindex) {
+  int use_hp = qindex < HIGH_PRECISION_MV_QTHRESH;
+#if !CONFIG_REALTIME_ONLY
+  MV_STATS *mv_stats = &cpi->mv_stats;
+#endif  // !CONFIG_REALTIME_ONLY
+
+  if (cpi->sf.hl_sf.high_precision_mv_usage == QTR_ONLY) {
+    use_hp = 0;
+  }
+#if !CONFIG_REALTIME_ONLY
+  else if (cpi->sf.hl_sf.high_precision_mv_usage == LAST_MV_DATA &&
+           av1_frame_allows_smart_mv(cpi) && mv_stats->valid) {
+    use_hp = get_smart_mv_prec(cpi, mv_stats, qindex);
+  }
+#endif  // !CONFIG_REALTIME_ONLY
+
+  av1_set_high_precision_mv(cpi, use_hp,
+                            cpi->common.features.cur_frame_force_integer_mv);
+}