1 files changed, 805 insertions, 0 deletions

diff --git a/third_party/aom/av1/encoder/av1_temporal_denoiser.c b/third_party/aom/av1/encoder/av1_temporal_denoiser.c
new file mode 100644
index 0000000000..3012df6311
--- /dev/null
+++ b/third_party/aom/av1/encoder/av1_temporal_denoiser.c
@@ -0,0 +1,805 @@
+/*
+ * Copyright (c) 2020, 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 <assert.h>
+#include <limits.h>
+#include <math.h>
+
+#include "config/aom_dsp_rtcd.h"
+#include "aom_dsp/aom_dsp_common.h"
+#include "aom_scale/yv12config.h"
+#include "aom/aom_integer.h"
+#include "av1/common/reconinter.h"
+#include "av1/encoder/reconinter_enc.h"
+#include "av1/encoder/context_tree.h"
+#include "av1/encoder/av1_temporal_denoiser.h"
+#include "av1/encoder/encoder.h"
+
+#ifdef OUTPUT_YUV_DENOISED
+static void make_grayscale(YV12_BUFFER_CONFIG *yuv);
+#endif
+
+static int absdiff_thresh(BLOCK_SIZE bs, int increase_denoising) {
+  (void)bs;
+  return 3 + (increase_denoising ? 1 : 0);
+}
+
+static int delta_thresh(BLOCK_SIZE bs, int increase_denoising) {
+  (void)bs;
+  (void)increase_denoising;
+  return 4;
+}
+
+static int noise_motion_thresh(BLOCK_SIZE bs, int increase_denoising) {
+  (void)bs;
+  (void)increase_denoising;
+  return 625;
+}
+
+static unsigned int sse_thresh(BLOCK_SIZE bs, int increase_denoising) {
+  return (1 << num_pels_log2_lookup[bs]) * (increase_denoising ? 80 : 40);
+}
+
+static int sse_diff_thresh(BLOCK_SIZE bs, int increase_denoising,
+                           int motion_magnitude) {
+  if (motion_magnitude > noise_motion_thresh(bs, increase_denoising)) {
+    if (increase_denoising)
+      return (1 << num_pels_log2_lookup[bs]) << 2;
+    else
+      return 0;
+  } else {
+    return (1 << num_pels_log2_lookup[bs]) << 4;
+  }
+}
+
+static int total_adj_weak_thresh(BLOCK_SIZE bs, int increase_denoising) {
+  return (1 << num_pels_log2_lookup[bs]) * (increase_denoising ? 3 : 2);
+}
+
+// TODO(kyslov): If increase_denoising is enabled in the future,
+// we might need to update the code for calculating 'total_adj' in
+// case the C code is not bit-exact with corresponding sse2 code.
+int av1_denoiser_filter_c(const uint8_t *sig, int sig_stride,
+                          const uint8_t *mc_avg, int mc_avg_stride,
+                          uint8_t *avg, int avg_stride, int increase_denoising,
+                          BLOCK_SIZE bs, int motion_magnitude) {
+  int r, c;
+  const uint8_t *sig_start = sig;
+  const uint8_t *mc_avg_start = mc_avg;
+  uint8_t *avg_start = avg;
+  int diff, adj, absdiff, delta;
+  int adj_val[] = { 3, 4, 6 };
+  int total_adj = 0;
+  int shift_inc = 1;
+
+  // If motion_magnitude is small, making the denoiser more aggressive by
+  // increasing the adjustment for each level. Add another increment for
+  // blocks that are labeled for increase denoising.
+  if (motion_magnitude <= MOTION_MAGNITUDE_THRESHOLD) {
+    if (increase_denoising) {
+      shift_inc = 2;
+    }
+    adj_val[0] += shift_inc;
+    adj_val[1] += shift_inc;
+    adj_val[2] += shift_inc;
+  }
+
+  // First attempt to apply a strong temporal denoising filter.
+  for (r = 0; r < block_size_high[bs]; ++r) {
+    for (c = 0; c < block_size_wide[bs]; ++c) {
+      diff = mc_avg[c] - sig[c];
+      absdiff = abs(diff);
+
+      if (absdiff <= absdiff_thresh(bs, increase_denoising)) {
+        avg[c] = mc_avg[c];
+        total_adj += diff;
+      } else {
+        switch (absdiff) {
+          case 4:
+          case 5:
+          case 6:
+          case 7: adj = adj_val[0]; break;
+          case 8:
+          case 9:
+          case 10:
+          case 11:
+          case 12:
+          case 13:
+          case 14:
+          case 15: adj = adj_val[1]; break;
+          default: adj = adj_val[2];
+        }
+        if (diff > 0) {
+          avg[c] = AOMMIN(UINT8_MAX, sig[c] + adj);
+          total_adj += adj;
+        } else {
+          avg[c] = AOMMAX(0, sig[c] - adj);
+          total_adj -= adj;
+        }
+      }
+    }
+    sig += sig_stride;
+    avg += avg_stride;
+    mc_avg += mc_avg_stride;
+  }
+
+  // If the strong filter did not modify the signal too much, we're all set.
+  if (abs(total_adj) <= total_adj_strong_thresh(bs, increase_denoising)) {
+    return FILTER_BLOCK;
+  }
+
+  // Otherwise, we try to dampen the filter if the delta is not too high.
+  delta = ((abs(total_adj) - total_adj_strong_thresh(bs, increase_denoising)) >>
+           num_pels_log2_lookup[bs]) +
+          1;
+
+  if (delta >= delta_thresh(bs, increase_denoising)) {
+    return COPY_BLOCK;
+  }
+
+  mc_avg = mc_avg_start;
+  avg = avg_start;
+  sig = sig_start;
+  for (r = 0; r < block_size_high[bs]; ++r) {
+    for (c = 0; c < block_size_wide[bs]; ++c) {
+      diff = mc_avg[c] - sig[c];
+      adj = abs(diff);
+      if (adj > delta) {
+        adj = delta;
+      }
+      if (diff > 0) {
+        // Diff positive means we made positive adjustment above
+        // (in first try/attempt), so now make negative adjustment to bring
+        // denoised signal down.
+        avg[c] = AOMMAX(0, avg[c] - adj);
+        total_adj -= adj;
+      } else {
+        // Diff negative means we made negative adjustment above
+        // (in first try/attempt), so now make positive adjustment to bring
+        // denoised signal up.
+        avg[c] = AOMMIN(UINT8_MAX, avg[c] + adj);
+        total_adj += adj;
+      }
+    }
+    sig += sig_stride;
+    avg += avg_stride;
+    mc_avg += mc_avg_stride;
+  }
+
+  // We can use the filter if it has been sufficiently dampened
+  if (abs(total_adj) <= total_adj_weak_thresh(bs, increase_denoising)) {
+    return FILTER_BLOCK;
+  }
+  return COPY_BLOCK;
+}
+
+static uint8_t *block_start(uint8_t *framebuf, int stride, int mi_row,
+                            int mi_col) {
+  return framebuf + (stride * mi_row << 2) + (mi_col << 2);
+}
+
+static AV1_DENOISER_DECISION perform_motion_compensation(
+    AV1_COMMON *const cm, AV1_DENOISER *denoiser, MACROBLOCK *mb, BLOCK_SIZE bs,
+    int increase_denoising, int mi_row, int mi_col, PICK_MODE_CONTEXT *ctx,
+    int motion_magnitude, int *zeromv_filter, int num_spatial_layers, int width,
+    int lst_fb_idx, int gld_fb_idx, int use_svc, int spatial_layer,
+    int use_gf_temporal_ref) {
+  const int sse_diff = (ctx->newmv_sse == UINT_MAX)
+                           ? 0
+                           : ((int)ctx->zeromv_sse - (int)ctx->newmv_sse);
+  int frame;
+  int denoise_layer_idx = 0;
+  MACROBLOCKD *filter_mbd = &mb->e_mbd;
+  MB_MODE_INFO *mi = filter_mbd->mi[0];
+  MB_MODE_INFO saved_mi;
+  int i;
+  struct buf_2d saved_dst[MAX_MB_PLANE];
+  struct buf_2d saved_pre[MAX_MB_PLANE];
+  // const RefBuffer *saved_block_refs[2];
+  MV_REFERENCE_FRAME saved_frame;
+
+  frame = ctx->best_reference_frame;
+
+  saved_mi = *mi;
+
+  // Avoid denoising small blocks. When noise > kDenLow or frame width > 480,
+  // denoise 16x16 blocks.
+  if (bs == BLOCK_8X8 || bs == BLOCK_8X16 || bs == BLOCK_16X8 ||
+      (bs == BLOCK_16X16 && width > 480 &&
+       denoiser->denoising_level <= kDenLow))
+    return COPY_BLOCK;
+
+  // If the best reference frame uses inter-prediction and there is enough of a
+  // difference in sum-squared-error, use it.
+  if (frame != INTRA_FRAME && frame != ALTREF_FRAME && frame != GOLDEN_FRAME &&
+      sse_diff > sse_diff_thresh(bs, increase_denoising, motion_magnitude)) {
+    mi->ref_frame[0] = ctx->best_reference_frame;
+    mi->mode = ctx->best_sse_inter_mode;
+    mi->mv[0] = ctx->best_sse_mv;
+  } else {
+    // Otherwise, use the zero reference frame.
+    frame = ctx->best_zeromv_reference_frame;
+    ctx->newmv_sse = ctx->zeromv_sse;
+    // Bias to last reference.
+    if ((num_spatial_layers > 1 && !use_gf_temporal_ref) ||
+        frame == ALTREF_FRAME ||
+        (frame == GOLDEN_FRAME && use_gf_temporal_ref) ||
+        (frame != LAST_FRAME &&
+         ((ctx->zeromv_lastref_sse < (5 * ctx->zeromv_sse) >> 2) ||
+          denoiser->denoising_level >= kDenHigh))) {
+      frame = LAST_FRAME;
+      ctx->newmv_sse = ctx->zeromv_lastref_sse;
+    }
+    mi->ref_frame[0] = frame;
+    mi->mode = GLOBALMV;
+    mi->mv[0].as_int = 0;
+    ctx->best_sse_inter_mode = GLOBALMV;
+    ctx->best_sse_mv.as_int = 0;
+    *zeromv_filter = 1;
+    if (denoiser->denoising_level > kDenMedium) {
+      motion_magnitude = 0;
+    }
+  }
+
+  saved_frame = frame;
+  // When using SVC, we need to map REF_FRAME to the frame buffer index.
+  if (use_svc) {
+    if (frame == LAST_FRAME)
+      frame = lst_fb_idx + 1;
+    else if (frame == GOLDEN_FRAME)
+      frame = gld_fb_idx + 1;
+    // Shift for the second spatial layer.
+    if (num_spatial_layers - spatial_layer == 2)
+      frame = frame + denoiser->num_ref_frames;
+    denoise_layer_idx = num_spatial_layers - spatial_layer - 1;
+  }
+
+  // Force copy (no denoise, copy source in denoised buffer) if
+  // running_avg_y[frame] is NULL.
+  if (denoiser->running_avg_y[frame].buffer_alloc == NULL) {
+    // Restore everything to its original state
+    *mi = saved_mi;
+    return COPY_BLOCK;
+  }
+
+  if (ctx->newmv_sse > sse_thresh(bs, increase_denoising)) {
+    // Restore everything to its original state
+    *mi = saved_mi;
+    return COPY_BLOCK;
+  }
+  if (motion_magnitude > (noise_motion_thresh(bs, increase_denoising) << 3)) {
+    // Restore everything to its original state
+    *mi = saved_mi;
+    return COPY_BLOCK;
+  }
+
+  // We will restore these after motion compensation.
+  for (i = 0; i < MAX_MB_PLANE; ++i) {
+    saved_pre[i] = filter_mbd->plane[i].pre[0];
+    saved_dst[i] = filter_mbd->plane[i].dst;
+  }
+
+  // Set the pointers in the MACROBLOCKD to point to the buffers in the denoiser
+  // struct.
+  set_ref_ptrs(cm, filter_mbd, saved_frame, NONE);
+  av1_setup_pre_planes(filter_mbd, 0, &(denoiser->running_avg_y[frame]), mi_row,
+                       mi_col, filter_mbd->block_ref_scale_factors[0], 1);
+  av1_setup_dst_planes(filter_mbd->plane, bs,
+                       &(denoiser->mc_running_avg_y[denoise_layer_idx]), mi_row,
+                       mi_col, 0, 1);
+
+  av1_enc_build_inter_predictor_y(filter_mbd, mi_row, mi_col);
+
+  // Restore everything to its original state
+  *mi = saved_mi;
+  for (i = 0; i < MAX_MB_PLANE; ++i) {
+    filter_mbd->plane[i].pre[0] = saved_pre[i];
+    filter_mbd->plane[i].dst = saved_dst[i];
+  }
+
+  return FILTER_BLOCK;
+}
+
+void av1_denoiser_denoise(AV1_COMP *cpi, MACROBLOCK *mb, int mi_row, int mi_col,
+                          BLOCK_SIZE bs, PICK_MODE_CONTEXT *ctx,
+                          AV1_DENOISER_DECISION *denoiser_decision,
+                          int use_gf_temporal_ref) {
+  int mv_col, mv_row;
+  int motion_magnitude = 0;
+  int zeromv_filter = 0;
+  AV1_DENOISER *denoiser = &cpi->denoiser;
+  AV1_DENOISER_DECISION decision = COPY_BLOCK;
+
+  const int shift =
+      cpi->svc.number_spatial_layers - cpi->svc.spatial_layer_id == 2
+          ? denoiser->num_ref_frames
+          : 0;
+  YV12_BUFFER_CONFIG avg = denoiser->running_avg_y[INTRA_FRAME + shift];
+  const int denoise_layer_index =
+      cpi->svc.number_spatial_layers - cpi->svc.spatial_layer_id - 1;
+  YV12_BUFFER_CONFIG mc_avg = denoiser->mc_running_avg_y[denoise_layer_index];
+  uint8_t *avg_start = block_start(avg.y_buffer, avg.y_stride, mi_row, mi_col);
+
+  uint8_t *mc_avg_start =
+      block_start(mc_avg.y_buffer, mc_avg.y_stride, mi_row, mi_col);
+  struct buf_2d src = mb->plane[0].src;
+  int increase_denoising = 0;
+  int last_is_reference = cpi->ref_frame_flags & AOM_LAST_FLAG;
+  mv_col = ctx->best_sse_mv.as_mv.col;
+  mv_row = ctx->best_sse_mv.as_mv.row;
+  motion_magnitude = mv_row * mv_row + mv_col * mv_col;
+
+  if (denoiser->denoising_level == kDenHigh) increase_denoising = 1;
+
+  // Copy block if LAST_FRAME is not a reference.
+  // Last doesn't always exist when SVC layers are dynamically changed, e.g. top
+  // spatial layer doesn't have last reference when it's brought up for the
+  // first time on the fly.
+  if (last_is_reference && denoiser->denoising_level >= kDenLow &&
+      !ctx->sb_skip_denoising)
+    decision = perform_motion_compensation(
+        &cpi->common, denoiser, mb, bs, increase_denoising, mi_row, mi_col, ctx,
+        motion_magnitude, &zeromv_filter, cpi->svc.number_spatial_layers,
+        cpi->source->y_width, cpi->ppi->rtc_ref.ref_idx[0],
+        cpi->ppi->rtc_ref.ref_idx[3], cpi->ppi->use_svc,
+        cpi->svc.spatial_layer_id, use_gf_temporal_ref);
+
+  if (decision == FILTER_BLOCK) {
+    decision = av1_denoiser_filter(src.buf, src.stride, mc_avg_start,
+                                   mc_avg.y_stride, avg_start, avg.y_stride,
+                                   increase_denoising, bs, motion_magnitude);
+  }
+
+  if (decision == FILTER_BLOCK) {
+    aom_convolve_copy(avg_start, avg.y_stride, src.buf, src.stride,
+                      block_size_wide[bs], block_size_high[bs]);
+  } else {  // COPY_BLOCK
+    aom_convolve_copy(src.buf, src.stride, avg_start, avg.y_stride,
+                      block_size_wide[bs], block_size_high[bs]);
+  }
+  *denoiser_decision = decision;
+  if (decision == FILTER_BLOCK && zeromv_filter == 1)
+    *denoiser_decision = FILTER_ZEROMV_BLOCK;
+}
+
+static void copy_frame(YV12_BUFFER_CONFIG *const dest,
+                       const YV12_BUFFER_CONFIG *const src) {
+  int r;
+  const uint8_t *srcbuf = src->y_buffer;
+  uint8_t *destbuf = dest->y_buffer;
+
+  assert(dest->y_width == src->y_width);
+  assert(dest->y_height == src->y_height);
+
+  for (r = 0; r < dest->y_height; ++r) {
+    memcpy(destbuf, srcbuf, dest->y_width);
+    destbuf += dest->y_stride;
+    srcbuf += src->y_stride;
+  }
+}
+
+static void swap_frame_buffer(YV12_BUFFER_CONFIG *const dest,
+                              YV12_BUFFER_CONFIG *const src) {
+  uint8_t *tmp_buf = dest->y_buffer;
+  assert(dest->y_width == src->y_width);
+  assert(dest->y_height == src->y_height);
+  dest->y_buffer = src->y_buffer;
+  src->y_buffer = tmp_buf;
+}
+
+void av1_denoiser_update_frame_info(
+    AV1_DENOISER *denoiser, YV12_BUFFER_CONFIG src, struct RTC_REF *rtc_ref,
+    struct SVC *svc, FRAME_TYPE frame_type, int refresh_alt_ref_frame,
+    int refresh_golden_frame, int refresh_last_frame, int alt_fb_idx,
+    int gld_fb_idx, int lst_fb_idx, int resized,
+    int svc_refresh_denoiser_buffers, int second_spatial_layer) {
+  const int shift = second_spatial_layer ? denoiser->num_ref_frames : 0;
+  // Copy source into denoised reference buffers on KEY_FRAME or
+  // if the just encoded frame was resized. For SVC, copy source if the base
+  // spatial layer was key frame.
+  if (frame_type == KEY_FRAME || resized != 0 || denoiser->reset ||
+      svc_refresh_denoiser_buffers) {
+    int i;
+    // Start at 1 so as not to overwrite the INTRA_FRAME
+    for (i = 1; i < denoiser->num_ref_frames; ++i) {
+      if (denoiser->running_avg_y[i + shift].buffer_alloc != NULL)
+        copy_frame(&denoiser->running_avg_y[i + shift], &src);
+    }
+    denoiser->reset = 0;
+    return;
+  }
+
+  if (rtc_ref->set_ref_frame_config) {
+    int i;
+    for (i = 0; i < REF_FRAMES; i++) {
+      if (rtc_ref->refresh[svc->spatial_layer_id] & (1 << i))
+        copy_frame(&denoiser->running_avg_y[i + 1 + shift],
+                   &denoiser->running_avg_y[INTRA_FRAME + shift]);
+    }
+  } else {
+    // If more than one refresh occurs, must copy frame buffer.
+    if ((refresh_alt_ref_frame + refresh_golden_frame + refresh_last_frame) >
+        1) {
+      if (refresh_alt_ref_frame) {
+        copy_frame(&denoiser->running_avg_y[alt_fb_idx + 1 + shift],
+                   &denoiser->running_avg_y[INTRA_FRAME + shift]);
+      }
+      if (refresh_golden_frame) {
+        copy_frame(&denoiser->running_avg_y[gld_fb_idx + 1 + shift],
+                   &denoiser->running_avg_y[INTRA_FRAME + shift]);
+      }
+      if (refresh_last_frame) {
+        copy_frame(&denoiser->running_avg_y[lst_fb_idx + 1 + shift],
+                   &denoiser->running_avg_y[INTRA_FRAME + shift]);
+      }
+    } else {
+      if (refresh_alt_ref_frame) {
+        swap_frame_buffer(&denoiser->running_avg_y[alt_fb_idx + 1 + shift],
+                          &denoiser->running_avg_y[INTRA_FRAME + shift]);
+      }
+      if (refresh_golden_frame) {
+        swap_frame_buffer(&denoiser->running_avg_y[gld_fb_idx + 1 + shift],
+                          &denoiser->running_avg_y[INTRA_FRAME + shift]);
+      }
+      if (refresh_last_frame) {
+        swap_frame_buffer(&denoiser->running_avg_y[lst_fb_idx + 1 + shift],
+                          &denoiser->running_avg_y[INTRA_FRAME + shift]);
+      }
+    }
+  }
+}
+
+void av1_denoiser_reset_frame_stats(PICK_MODE_CONTEXT *ctx) {
+  ctx->zeromv_sse = INT64_MAX;
+  ctx->newmv_sse = INT64_MAX;
+  ctx->zeromv_lastref_sse = INT64_MAX;
+  ctx->best_sse_mv.as_int = 0;
+}
+
+void av1_denoiser_update_frame_stats(MB_MODE_INFO *mi, int64_t sse,
+                                     PREDICTION_MODE mode,
+                                     PICK_MODE_CONTEXT *ctx) {
+  if (mi->mv[0].as_int == 0 && sse < ctx->zeromv_sse) {
+    ctx->zeromv_sse = sse;
+    ctx->best_zeromv_reference_frame = mi->ref_frame[0];
+    if (mi->ref_frame[0] == LAST_FRAME) ctx->zeromv_lastref_sse = sse;
+  }
+
+  if (mi->mv[0].as_int != 0 && sse < ctx->newmv_sse) {
+    ctx->newmv_sse = sse;
+    ctx->best_sse_inter_mode = mode;
+    ctx->best_sse_mv = mi->mv[0];
+    ctx->best_reference_frame = mi->ref_frame[0];
+  }
+}
+
+static int av1_denoiser_realloc_svc_helper(AV1_COMMON *cm,
+                                           AV1_DENOISER *denoiser, int fb_idx) {
+  int fail = 0;
+  if (denoiser->running_avg_y[fb_idx].buffer_alloc == NULL) {
+    fail = aom_alloc_frame_buffer(
+        &denoiser->running_avg_y[fb_idx], cm->width, cm->height,
+        cm->seq_params->subsampling_x, cm->seq_params->subsampling_y,
+        cm->seq_params->use_highbitdepth, AOM_BORDER_IN_PIXELS,
+        cm->features.byte_alignment, 0, 0);
+    if (fail) {
+      av1_denoiser_free(denoiser);
+      return 1;
+    }
+  }
+  return 0;
+}
+
+int av1_denoiser_realloc_svc(AV1_COMMON *cm, AV1_DENOISER *denoiser,
+                             struct RTC_REF *rtc_ref, struct SVC *svc,
+                             int svc_buf_shift, int refresh_alt,
+                             int refresh_gld, int refresh_lst, int alt_fb_idx,
+                             int gld_fb_idx, int lst_fb_idx) {
+  int fail = 0;
+  if (rtc_ref->set_ref_frame_config) {
+    int i;
+    for (i = 0; i < REF_FRAMES; i++) {
+      if (cm->current_frame.frame_type == KEY_FRAME ||
+          rtc_ref->refresh[svc->spatial_layer_id] & (1 << i)) {
+        fail = av1_denoiser_realloc_svc_helper(cm, denoiser,
+                                               i + 1 + svc_buf_shift);
+      }
+    }
+  } else {
+    if (refresh_alt) {
+      // Increase the frame buffer index by 1 to map it to the buffer index in
+      // the denoiser.
+      fail = av1_denoiser_realloc_svc_helper(cm, denoiser,
+                                             alt_fb_idx + 1 + svc_buf_shift);
+      if (fail) return 1;
+    }
+    if (refresh_gld) {
+      fail = av1_denoiser_realloc_svc_helper(cm, denoiser,
+                                             gld_fb_idx + 1 + svc_buf_shift);
+      if (fail) return 1;
+    }
+    if (refresh_lst) {
+      fail = av1_denoiser_realloc_svc_helper(cm, denoiser,
+                                             lst_fb_idx + 1 + svc_buf_shift);
+      if (fail) return 1;
+    }
+  }
+  return 0;
+}
+
+int av1_denoiser_alloc(AV1_COMMON *cm, struct SVC *svc, AV1_DENOISER *denoiser,
+                       int use_svc, int noise_sen, int width, int height,
+                       int ssx, int ssy, int use_highbitdepth, int border) {
+  int i, layer, fail, init_num_ref_frames;
+  const int legacy_byte_alignment = 0;
+  int num_layers = 1;
+  int scaled_width = width;
+  int scaled_height = height;
+  if (use_svc) {
+    LAYER_CONTEXT *lc = &svc->layer_context[svc->spatial_layer_id *
+                                                svc->number_temporal_layers +
+                                            svc->temporal_layer_id];
+    av1_get_layer_resolution(width, height, lc->scaling_factor_num,
+                             lc->scaling_factor_den, &scaled_width,
+                             &scaled_height);
+    // For SVC: only denoise at most 2 spatial (highest) layers.
+    if (noise_sen >= 2)
+      // Denoise from one spatial layer below the top.
+      svc->first_layer_denoise = AOMMAX(svc->number_spatial_layers - 2, 0);
+    else
+      // Only denoise the top spatial layer.
+      svc->first_layer_denoise = AOMMAX(svc->number_spatial_layers - 1, 0);
+    num_layers = svc->number_spatial_layers - svc->first_layer_denoise;
+  }
+  assert(denoiser != NULL);
+  denoiser->num_ref_frames = use_svc ? SVC_REF_FRAMES : NONSVC_REF_FRAMES;
+  init_num_ref_frames = use_svc ? REF_FRAMES : NONSVC_REF_FRAMES;
+  denoiser->num_layers = num_layers;
+  CHECK_MEM_ERROR(cm, denoiser->running_avg_y,
+                  aom_calloc(denoiser->num_ref_frames * num_layers,
+                             sizeof(denoiser->running_avg_y[0])));
+  CHECK_MEM_ERROR(
+      cm, denoiser->mc_running_avg_y,
+      aom_calloc(num_layers, sizeof(denoiser->mc_running_avg_y[0])));
+
+  for (layer = 0; layer < num_layers; ++layer) {
+    const int denoise_width = (layer == 0) ? width : scaled_width;
+    const int denoise_height = (layer == 0) ? height : scaled_height;
+    for (i = 0; i < init_num_ref_frames; ++i) {
+      fail = aom_alloc_frame_buffer(
+          &denoiser->running_avg_y[i + denoiser->num_ref_frames * layer],
+          denoise_width, denoise_height, ssx, ssy, use_highbitdepth, border,
+          legacy_byte_alignment, 0, 0);
+      if (fail) {
+        av1_denoiser_free(denoiser);
+        return 1;
+      }
+#ifdef OUTPUT_YUV_DENOISED
+      make_grayscale(&denoiser->running_avg_y[i]);
+#endif
+    }
+
+    fail = aom_alloc_frame_buffer(
+        &denoiser->mc_running_avg_y[layer], denoise_width, denoise_height, ssx,
+        ssy, use_highbitdepth, border, legacy_byte_alignment, 0, 0);
+    if (fail) {
+      av1_denoiser_free(denoiser);
+      return 1;
+    }
+  }
+
+  // denoiser->last_source only used for noise_estimation, so only for top
+  // layer.
+  fail = aom_alloc_frame_buffer(&denoiser->last_source, width, height, ssx, ssy,
+                                use_highbitdepth, border, legacy_byte_alignment,
+                                0, 0);
+  if (fail) {
+    av1_denoiser_free(denoiser);
+    return 1;
+  }
+#ifdef OUTPUT_YUV_DENOISED
+  make_grayscale(&denoiser->running_avg_y[i]);
+#endif
+  denoiser->frame_buffer_initialized = 1;
+  denoiser->denoising_level = kDenMedium;
+  denoiser->prev_denoising_level = kDenMedium;
+  denoiser->reset = 0;
+  denoiser->current_denoiser_frame = 0;
+  return 0;
+}
+
+void av1_denoiser_free(AV1_DENOISER *denoiser) {
+  int i;
+  if (denoiser == NULL) {
+    return;
+  }
+  denoiser->frame_buffer_initialized = 0;
+  for (i = 0; i < denoiser->num_ref_frames * denoiser->num_layers; ++i) {
+    aom_free_frame_buffer(&denoiser->running_avg_y[i]);
+  }
+  aom_free(denoiser->running_avg_y);
+  denoiser->running_avg_y = NULL;
+
+  for (i = 0; i < denoiser->num_layers; ++i) {
+    aom_free_frame_buffer(&denoiser->mc_running_avg_y[i]);
+  }
+
+  aom_free(denoiser->mc_running_avg_y);
+  denoiser->mc_running_avg_y = NULL;
+  aom_free_frame_buffer(&denoiser->last_source);
+}
+
+// TODO(kyslov) Enable when SVC temporal denosing is implemented
+#if 0
+static void force_refresh_longterm_ref(AV1_COMP *const cpi) {
+  SVC *const svc = &cpi->svc;
+  // If long term reference is used, force refresh of that slot, so
+  // denoiser buffer for long term reference stays in sync.
+  if (svc->use_gf_temporal_ref_current_layer) {
+    int index = svc->spatial_layer_id;
+    if (svc->number_spatial_layers == 3) index = svc->spatial_layer_id - 1;
+    assert(index >= 0);
+    cpi->alt_fb_idx = svc->buffer_gf_temporal_ref[index].idx;
+    cpi->refresh_alt_ref_frame = 1;
+  }
+}
+#endif
+
+void av1_denoiser_set_noise_level(AV1_COMP *const cpi, int noise_level) {
+  AV1_DENOISER *const denoiser = &cpi->denoiser;
+  denoiser->denoising_level = noise_level;
+  if (denoiser->denoising_level > kDenLowLow &&
+      denoiser->prev_denoising_level == kDenLowLow) {
+    denoiser->reset = 1;
+// TODO(kyslov) Enable when SVC temporal denosing is implemented
+#if 0
+    force_refresh_longterm_ref(cpi);
+#endif
+  } else {
+    denoiser->reset = 0;
+  }
+  denoiser->prev_denoising_level = denoiser->denoising_level;
+}
+
+// Scale/increase the partition threshold
+// for denoiser speed-up.
+int64_t av1_scale_part_thresh(int64_t threshold, AV1_DENOISER_LEVEL noise_level,
+                              CONTENT_STATE_SB content_state,
+                              int temporal_layer_id) {
+  if ((content_state.source_sad_nonrd <= kLowSad &&
+       content_state.low_sumdiff) ||
+      (content_state.source_sad_nonrd == kHighSad &&
+       content_state.low_sumdiff) ||
+      (content_state.lighting_change && !content_state.low_sumdiff) ||
+      (noise_level == kDenHigh) || (temporal_layer_id != 0)) {
+    int64_t scaled_thr =
+        (temporal_layer_id < 2) ? (3 * threshold) >> 1 : (7 * threshold) >> 2;
+    return scaled_thr;
+  } else {
+    return (5 * threshold) >> 2;
+  }
+}
+
+//  Scale/increase the ac skip threshold for
+//  denoiser speed-up.
+int64_t av1_scale_acskip_thresh(int64_t threshold,
+                                AV1_DENOISER_LEVEL noise_level, int abs_sumdiff,
+                                int temporal_layer_id) {
+  if (noise_level >= kDenLow && abs_sumdiff < 5)
+    threshold *= (noise_level == kDenLow)   ? 2
+                 : (temporal_layer_id == 2) ? 10
+                                            : 6;
+  return threshold;
+}
+
+void av1_denoiser_reset_on_first_frame(AV1_COMP *const cpi) {
+  if (/*av1_denoise_svc_non_key(cpi) &&*/
+      cpi->denoiser.current_denoiser_frame == 0) {
+    cpi->denoiser.reset = 1;
+// TODO(kyslov) Enable when SVC temporal denosing is implemented
+#if 0
+    force_refresh_longterm_ref(cpi);
+#endif
+  }
+}
+
+void av1_denoiser_update_ref_frame(AV1_COMP *const cpi) {
+  AV1_COMMON *const cm = &cpi->common;
+  RTC_REF *const rtc_ref = &cpi->ppi->rtc_ref;
+  SVC *const svc = &cpi->svc;
+
+  if (cpi->oxcf.noise_sensitivity > 0 && denoise_svc(cpi) &&
+      cpi->denoiser.denoising_level > kDenLowLow) {
+    int svc_refresh_denoiser_buffers = 0;
+    int denoise_svc_second_layer = 0;
+    FRAME_TYPE frame_type = cm->current_frame.frame_type == INTRA_ONLY_FRAME
+                                ? KEY_FRAME
+                                : cm->current_frame.frame_type;
+    cpi->denoiser.current_denoiser_frame++;
+    const int resize_pending = is_frame_resize_pending(cpi);
+
+    if (cpi->ppi->use_svc) {
+// TODO(kyslov) Enable when SVC temporal denosing is implemented
+#if 0
+      const int svc_buf_shift =
+          svc->number_spatial_layers - svc->spatial_layer_id == 2
+              ? cpi->denoiser.num_ref_frames
+              : 0;
+      int layer =
+          LAYER_IDS_TO_IDX(svc->spatial_layer_id, svc->temporal_layer_id,
+                           svc->number_temporal_layers);
+      LAYER_CONTEXT *const lc = &svc->layer_context[layer];
+      svc_refresh_denoiser_buffers =
+          lc->is_key_frame || svc->spatial_layer_sync[svc->spatial_layer_id];
+      denoise_svc_second_layer =
+          svc->number_spatial_layers - svc->spatial_layer_id == 2 ? 1 : 0;
+      // Check if we need to allocate extra buffers in the denoiser
+      // for refreshed frames.
+      if (av1_denoiser_realloc_svc(cm, &cpi->denoiser, rtc_ref,
+                                   svc, svc_buf_shift,
+                                   cpi->refresh_alt_ref_frame,
+                                   cpi->refresh_golden_frame,
+                                   cpi->refresh_last_frame, cpi->alt_fb_idx,
+                                   cpi->gld_fb_idx, cpi->lst_fb_idx))
+        aom_internal_error(cm->error, AOM_CODEC_MEM_ERROR,
+                           "Failed to re-allocate denoiser for SVC");
+#endif
+    }
+    av1_denoiser_update_frame_info(
+        &cpi->denoiser, *cpi->source, rtc_ref, svc, frame_type,
+        cpi->refresh_frame.alt_ref_frame, cpi->refresh_frame.golden_frame, 1,
+        rtc_ref->ref_idx[6], rtc_ref->ref_idx[3], rtc_ref->ref_idx[0],
+        resize_pending, svc_refresh_denoiser_buffers, denoise_svc_second_layer);
+  }
+}
+
+#ifdef OUTPUT_YUV_DENOISED
+static void make_grayscale(YV12_BUFFER_CONFIG *yuv) {
+  int r, c;
+  uint8_t *u = yuv->u_buffer;
+  uint8_t *v = yuv->v_buffer;
+
+  for (r = 0; r < yuv->uv_height; ++r) {
+    for (c = 0; c < yuv->uv_width; ++c) {
+      u[c] = UINT8_MAX / 2;
+      v[c] = UINT8_MAX / 2;
+    }
+    u += yuv->uv_stride;
+    v += yuv->uv_stride;
+  }
+}
+
+void aom_write_yuv_frame(FILE *yuv_file, YV12_BUFFER_CONFIG *s) {
+  unsigned char *src = s->y_buffer;
+  int h = s->y_crop_height;
+
+  do {
+    fwrite(src, s->y_width, 1, yuv_file);
+    src += s->y_stride;
+  } while (--h);
+
+  src = s->u_buffer;
+  h = s->uv_crop_height;
+
+  do {
+    fwrite(src, s->uv_width, 1, yuv_file);
+    src += s->uv_stride;
+  } while (--h);
+
+  src = s->v_buffer;
+  h = s->uv_crop_height;
+
+  do {
+    fwrite(src, s->uv_width, 1, yuv_file);
+    src += s->uv_stride;
+  } while (--h);
+}
+#endif