diff options
Diffstat (limited to 'media/libvpx/libvpx/vp8/encoder/denoising.c')
| -rw-r--r-- | media/libvpx/libvpx/vp8/encoder/denoising.c | 725 |
1 files changed, 725 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp8/encoder/denoising.c b/media/libvpx/libvpx/vp8/encoder/denoising.c new file mode 100644 index 0000000000..a666bca4d2 --- /dev/null +++ b/media/libvpx/libvpx/vp8/encoder/denoising.c @@ -0,0 +1,725 @@ +/* + * Copyright (c) 2012 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include <limits.h> + +#include "denoising.h" + +#include "vp8/common/reconinter.h" +#include "vpx/vpx_integer.h" +#include "vpx_mem/vpx_mem.h" +#include "vp8_rtcd.h" + +static const unsigned int NOISE_MOTION_THRESHOLD = 25 * 25; +/* SSE_DIFF_THRESHOLD is selected as ~95% confidence assuming + * var(noise) ~= 100. + */ +static const unsigned int SSE_DIFF_THRESHOLD = 16 * 16 * 20; +static const unsigned int SSE_THRESHOLD = 16 * 16 * 40; +static const unsigned int SSE_THRESHOLD_HIGH = 16 * 16 * 80; + +/* + * The filter function was modified to reduce the computational complexity. + * Step 1: + * Instead of applying tap coefficients for each pixel, we calculated the + * pixel adjustments vs. pixel diff value ahead of time. + * adjustment = filtered_value - current_raw + * = (filter_coefficient * diff + 128) >> 8 + * where + * filter_coefficient = (255 << 8) / (256 + ((absdiff * 330) >> 3)); + * filter_coefficient += filter_coefficient / + * (3 + motion_magnitude_adjustment); + * filter_coefficient is clamped to 0 ~ 255. + * + * Step 2: + * The adjustment vs. diff curve becomes flat very quick when diff increases. + * This allowed us to use only several levels to approximate the curve without + * changing the filtering algorithm too much. + * The adjustments were further corrected by checking the motion magnitude. + * The levels used are: + * diff adjustment w/o motion correction adjustment w/ motion correction + * [-255, -16] -6 -7 + * [-15, -8] -4 -5 + * [-7, -4] -3 -4 + * [-3, 3] diff diff + * [4, 7] 3 4 + * [8, 15] 4 5 + * [16, 255] 6 7 + */ + +int vp8_denoiser_filter_c(unsigned char *mc_running_avg_y, int mc_avg_y_stride, + unsigned char *running_avg_y, int avg_y_stride, + unsigned char *sig, int sig_stride, + unsigned int motion_magnitude, + int increase_denoising) { + unsigned char *running_avg_y_start = running_avg_y; + unsigned char *sig_start = sig; + int sum_diff_thresh; + int r, c; + int sum_diff = 0; + int adj_val[3] = { 3, 4, 6 }; + int shift_inc1 = 0; + int shift_inc2 = 1; + int col_sum[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; + /* 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_inc1 = 1; + shift_inc2 = 2; + } + adj_val[0] += shift_inc2; + adj_val[1] += shift_inc2; + adj_val[2] += shift_inc2; + } + + for (r = 0; r < 16; ++r) { + for (c = 0; c < 16; ++c) { + int diff = 0; + int adjustment = 0; + int absdiff = 0; + + diff = mc_running_avg_y[c] - sig[c]; + absdiff = abs(diff); + + // When |diff| <= |3 + shift_inc1|, use pixel value from + // last denoised raw. + if (absdiff <= 3 + shift_inc1) { + running_avg_y[c] = mc_running_avg_y[c]; + col_sum[c] += diff; + } else { + if (absdiff >= 4 + shift_inc1 && absdiff <= 7) { + adjustment = adj_val[0]; + } else if (absdiff >= 8 && absdiff <= 15) { + adjustment = adj_val[1]; + } else { + adjustment = adj_val[2]; + } + + if (diff > 0) { + if ((sig[c] + adjustment) > 255) { + running_avg_y[c] = 255; + } else { + running_avg_y[c] = sig[c] + adjustment; + } + + col_sum[c] += adjustment; + } else { + if ((sig[c] - adjustment) < 0) { + running_avg_y[c] = 0; + } else { + running_avg_y[c] = sig[c] - adjustment; + } + + col_sum[c] -= adjustment; + } + } + } + + /* Update pointers for next iteration. */ + sig += sig_stride; + mc_running_avg_y += mc_avg_y_stride; + running_avg_y += avg_y_stride; + } + + for (c = 0; c < 16; ++c) { + // Below we clip the value in the same way which SSE code use. + // When adopting aggressive denoiser, the adj_val for each pixel + // could be at most 8 (this is current max adjustment of the map). + // In SSE code, we calculate the sum of adj_val for + // the columns, so the sum could be up to 128(16 rows). However, + // the range of the value is -128 ~ 127 in SSE code, that's why + // we do this change in C code. + // We don't do this for UV denoiser, since there are only 8 rows, + // and max adjustments <= 8, so the sum of the columns will not + // exceed 64. + if (col_sum[c] >= 128) { + col_sum[c] = 127; + } + sum_diff += col_sum[c]; + } + + sum_diff_thresh = SUM_DIFF_THRESHOLD; + if (increase_denoising) sum_diff_thresh = SUM_DIFF_THRESHOLD_HIGH; + if (abs(sum_diff) > sum_diff_thresh) { + // Before returning to copy the block (i.e., apply no denoising), check + // if we can still apply some (weaker) temporal filtering to this block, + // that would otherwise not be denoised at all. Simplest is to apply + // an additional adjustment to running_avg_y to bring it closer to sig. + // The adjustment is capped by a maximum delta, and chosen such that + // in most cases the resulting sum_diff will be within the + // accceptable range given by sum_diff_thresh. + + // The delta is set by the excess of absolute pixel diff over threshold. + int delta = ((abs(sum_diff) - sum_diff_thresh) >> 8) + 1; + // Only apply the adjustment for max delta up to 3. + if (delta < 4) { + sig -= sig_stride * 16; + mc_running_avg_y -= mc_avg_y_stride * 16; + running_avg_y -= avg_y_stride * 16; + for (r = 0; r < 16; ++r) { + for (c = 0; c < 16; ++c) { + int diff = mc_running_avg_y[c] - sig[c]; + int adjustment = abs(diff); + if (adjustment > delta) adjustment = delta; + if (diff > 0) { + // Bring denoised signal down. + if (running_avg_y[c] - adjustment < 0) { + running_avg_y[c] = 0; + } else { + running_avg_y[c] = running_avg_y[c] - adjustment; + } + col_sum[c] -= adjustment; + } else if (diff < 0) { + // Bring denoised signal up. + if (running_avg_y[c] + adjustment > 255) { + running_avg_y[c] = 255; + } else { + running_avg_y[c] = running_avg_y[c] + adjustment; + } + col_sum[c] += adjustment; + } + } + // TODO(marpan): Check here if abs(sum_diff) has gone below the + // threshold sum_diff_thresh, and if so, we can exit the row loop. + sig += sig_stride; + mc_running_avg_y += mc_avg_y_stride; + running_avg_y += avg_y_stride; + } + + sum_diff = 0; + for (c = 0; c < 16; ++c) { + if (col_sum[c] >= 128) { + col_sum[c] = 127; + } + sum_diff += col_sum[c]; + } + + if (abs(sum_diff) > sum_diff_thresh) return COPY_BLOCK; + } else { + return COPY_BLOCK; + } + } + + vp8_copy_mem16x16(running_avg_y_start, avg_y_stride, sig_start, sig_stride); + return FILTER_BLOCK; +} + +int vp8_denoiser_filter_uv_c(unsigned char *mc_running_avg, int mc_avg_stride, + unsigned char *running_avg, int avg_stride, + unsigned char *sig, int sig_stride, + unsigned int motion_magnitude, + int increase_denoising) { + unsigned char *running_avg_start = running_avg; + unsigned char *sig_start = sig; + int sum_diff_thresh; + int r, c; + int sum_diff = 0; + int sum_block = 0; + int adj_val[3] = { 3, 4, 6 }; + int shift_inc1 = 0; + int shift_inc2 = 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_UV) { + if (increase_denoising) { + shift_inc1 = 1; + shift_inc2 = 2; + } + adj_val[0] += shift_inc2; + adj_val[1] += shift_inc2; + adj_val[2] += shift_inc2; + } + + // Avoid denoising color signal if its close to average level. + for (r = 0; r < 8; ++r) { + for (c = 0; c < 8; ++c) { + sum_block += sig[c]; + } + sig += sig_stride; + } + if (abs(sum_block - (128 * 8 * 8)) < SUM_DIFF_FROM_AVG_THRESH_UV) { + return COPY_BLOCK; + } + + sig -= sig_stride * 8; + for (r = 0; r < 8; ++r) { + for (c = 0; c < 8; ++c) { + int diff = 0; + int adjustment = 0; + int absdiff = 0; + + diff = mc_running_avg[c] - sig[c]; + absdiff = abs(diff); + + // When |diff| <= |3 + shift_inc1|, use pixel value from + // last denoised raw. + if (absdiff <= 3 + shift_inc1) { + running_avg[c] = mc_running_avg[c]; + sum_diff += diff; + } else { + if (absdiff >= 4 && absdiff <= 7) { + adjustment = adj_val[0]; + } else if (absdiff >= 8 && absdiff <= 15) { + adjustment = adj_val[1]; + } else { + adjustment = adj_val[2]; + } + if (diff > 0) { + if ((sig[c] + adjustment) > 255) { + running_avg[c] = 255; + } else { + running_avg[c] = sig[c] + adjustment; + } + sum_diff += adjustment; + } else { + if ((sig[c] - adjustment) < 0) { + running_avg[c] = 0; + } else { + running_avg[c] = sig[c] - adjustment; + } + sum_diff -= adjustment; + } + } + } + /* Update pointers for next iteration. */ + sig += sig_stride; + mc_running_avg += mc_avg_stride; + running_avg += avg_stride; + } + + sum_diff_thresh = SUM_DIFF_THRESHOLD_UV; + if (increase_denoising) sum_diff_thresh = SUM_DIFF_THRESHOLD_HIGH_UV; + if (abs(sum_diff) > sum_diff_thresh) { + // Before returning to copy the block (i.e., apply no denoising), check + // if we can still apply some (weaker) temporal filtering to this block, + // that would otherwise not be denoised at all. Simplest is to apply + // an additional adjustment to running_avg_y to bring it closer to sig. + // The adjustment is capped by a maximum delta, and chosen such that + // in most cases the resulting sum_diff will be within the + // accceptable range given by sum_diff_thresh. + + // The delta is set by the excess of absolute pixel diff over threshold. + int delta = ((abs(sum_diff) - sum_diff_thresh) >> 8) + 1; + // Only apply the adjustment for max delta up to 3. + if (delta < 4) { + sig -= sig_stride * 8; + mc_running_avg -= mc_avg_stride * 8; + running_avg -= avg_stride * 8; + for (r = 0; r < 8; ++r) { + for (c = 0; c < 8; ++c) { + int diff = mc_running_avg[c] - sig[c]; + int adjustment = abs(diff); + if (adjustment > delta) adjustment = delta; + if (diff > 0) { + // Bring denoised signal down. + if (running_avg[c] - adjustment < 0) { + running_avg[c] = 0; + } else { + running_avg[c] = running_avg[c] - adjustment; + } + sum_diff -= adjustment; + } else if (diff < 0) { + // Bring denoised signal up. + if (running_avg[c] + adjustment > 255) { + running_avg[c] = 255; + } else { + running_avg[c] = running_avg[c] + adjustment; + } + sum_diff += adjustment; + } + } + // TODO(marpan): Check here if abs(sum_diff) has gone below the + // threshold sum_diff_thresh, and if so, we can exit the row loop. + sig += sig_stride; + mc_running_avg += mc_avg_stride; + running_avg += avg_stride; + } + if (abs(sum_diff) > sum_diff_thresh) return COPY_BLOCK; + } else { + return COPY_BLOCK; + } + } + + vp8_copy_mem8x8(running_avg_start, avg_stride, sig_start, sig_stride); + return FILTER_BLOCK; +} + +void vp8_denoiser_set_parameters(VP8_DENOISER *denoiser, int mode) { + assert(mode > 0); // Denoiser is allocated only if mode > 0. + if (mode == 1) { + denoiser->denoiser_mode = kDenoiserOnYOnly; + } else if (mode == 2) { + denoiser->denoiser_mode = kDenoiserOnYUV; + } else if (mode == 3) { + denoiser->denoiser_mode = kDenoiserOnYUVAggressive; + } else { + denoiser->denoiser_mode = kDenoiserOnYUV; + } + if (denoiser->denoiser_mode != kDenoiserOnYUVAggressive) { + denoiser->denoise_pars.scale_sse_thresh = 1; + denoiser->denoise_pars.scale_motion_thresh = 8; + denoiser->denoise_pars.scale_increase_filter = 0; + denoiser->denoise_pars.denoise_mv_bias = 95; + denoiser->denoise_pars.pickmode_mv_bias = 100; + denoiser->denoise_pars.qp_thresh = 0; + denoiser->denoise_pars.consec_zerolast = UINT_MAX; + denoiser->denoise_pars.spatial_blur = 0; + } else { + denoiser->denoise_pars.scale_sse_thresh = 2; + denoiser->denoise_pars.scale_motion_thresh = 16; + denoiser->denoise_pars.scale_increase_filter = 1; + denoiser->denoise_pars.denoise_mv_bias = 60; + denoiser->denoise_pars.pickmode_mv_bias = 75; + denoiser->denoise_pars.qp_thresh = 80; + denoiser->denoise_pars.consec_zerolast = 15; + denoiser->denoise_pars.spatial_blur = 0; + } +} + +int vp8_denoiser_allocate(VP8_DENOISER *denoiser, int width, int height, + int num_mb_rows, int num_mb_cols, int mode) { + int i; + assert(denoiser); + denoiser->num_mb_cols = num_mb_cols; + + for (i = 0; i < MAX_REF_FRAMES; ++i) { + denoiser->yv12_running_avg[i].flags = 0; + + if (vp8_yv12_alloc_frame_buffer(&(denoiser->yv12_running_avg[i]), width, + height, VP8BORDERINPIXELS) < 0) { + vp8_denoiser_free(denoiser); + return 1; + } + memset(denoiser->yv12_running_avg[i].buffer_alloc, 0, + denoiser->yv12_running_avg[i].frame_size); + } + denoiser->yv12_mc_running_avg.flags = 0; + + if (vp8_yv12_alloc_frame_buffer(&(denoiser->yv12_mc_running_avg), width, + height, VP8BORDERINPIXELS) < 0) { + vp8_denoiser_free(denoiser); + return 1; + } + + memset(denoiser->yv12_mc_running_avg.buffer_alloc, 0, + denoiser->yv12_mc_running_avg.frame_size); + + if (vp8_yv12_alloc_frame_buffer(&denoiser->yv12_last_source, width, height, + VP8BORDERINPIXELS) < 0) { + vp8_denoiser_free(denoiser); + return 1; + } + memset(denoiser->yv12_last_source.buffer_alloc, 0, + denoiser->yv12_last_source.frame_size); + + denoiser->denoise_state = vpx_calloc((num_mb_rows * num_mb_cols), 1); + if (!denoiser->denoise_state) { + vp8_denoiser_free(denoiser); + return 1; + } + memset(denoiser->denoise_state, 0, (num_mb_rows * num_mb_cols)); + vp8_denoiser_set_parameters(denoiser, mode); + denoiser->nmse_source_diff = 0; + denoiser->nmse_source_diff_count = 0; + denoiser->qp_avg = 0; + // QP threshold below which we can go up to aggressive mode. + denoiser->qp_threshold_up = 80; + // QP threshold above which we can go back down to normal mode. + // For now keep this second threshold high, so not used currently. + denoiser->qp_threshold_down = 128; + // Bitrate thresholds and noise metric (nmse) thresholds for switching to + // aggressive mode. + // TODO(marpan): Adjust thresholds, including effect on resolution. + denoiser->bitrate_threshold = 400000; // (bits/sec). + denoiser->threshold_aggressive_mode = 80; + if (width * height > 1280 * 720) { + denoiser->bitrate_threshold = 3000000; + denoiser->threshold_aggressive_mode = 200; + } else if (width * height > 960 * 540) { + denoiser->bitrate_threshold = 1200000; + denoiser->threshold_aggressive_mode = 120; + } else if (width * height > 640 * 480) { + denoiser->bitrate_threshold = 600000; + denoiser->threshold_aggressive_mode = 100; + } + return 0; +} + +void vp8_denoiser_free(VP8_DENOISER *denoiser) { + int i; + assert(denoiser); + + for (i = 0; i < MAX_REF_FRAMES; ++i) { + vp8_yv12_de_alloc_frame_buffer(&denoiser->yv12_running_avg[i]); + } + vp8_yv12_de_alloc_frame_buffer(&denoiser->yv12_mc_running_avg); + vp8_yv12_de_alloc_frame_buffer(&denoiser->yv12_last_source); + vpx_free(denoiser->denoise_state); +} + +void vp8_denoiser_denoise_mb(VP8_DENOISER *denoiser, MACROBLOCK *x, + unsigned int best_sse, unsigned int zero_mv_sse, + int recon_yoffset, int recon_uvoffset, + loop_filter_info_n *lfi_n, int mb_row, int mb_col, + int block_index, int consec_zero_last) + +{ + int mv_row; + int mv_col; + unsigned int motion_threshold; + unsigned int motion_magnitude2; + unsigned int sse_thresh; + int sse_diff_thresh = 0; + // Spatial loop filter: only applied selectively based on + // temporal filter state of block relative to top/left neighbors. + int apply_spatial_loop_filter = 1; + MV_REFERENCE_FRAME frame = x->best_reference_frame; + MV_REFERENCE_FRAME zero_frame = x->best_zeromv_reference_frame; + + enum vp8_denoiser_decision decision = FILTER_BLOCK; + enum vp8_denoiser_decision decision_u = COPY_BLOCK; + enum vp8_denoiser_decision decision_v = COPY_BLOCK; + + if (zero_frame) { + YV12_BUFFER_CONFIG *src = &denoiser->yv12_running_avg[frame]; + YV12_BUFFER_CONFIG *dst = &denoiser->yv12_mc_running_avg; + YV12_BUFFER_CONFIG saved_pre, saved_dst; + MB_MODE_INFO saved_mbmi; + MACROBLOCKD *filter_xd = &x->e_mbd; + MB_MODE_INFO *mbmi = &filter_xd->mode_info_context->mbmi; + int sse_diff = 0; + // Bias on zero motion vector sse. + const int zero_bias = denoiser->denoise_pars.denoise_mv_bias; + zero_mv_sse = (unsigned int)((int64_t)zero_mv_sse * zero_bias / 100); + sse_diff = (int)zero_mv_sse - (int)best_sse; + + saved_mbmi = *mbmi; + + /* Use the best MV for the compensation. */ + mbmi->ref_frame = x->best_reference_frame; + mbmi->mode = x->best_sse_inter_mode; + mbmi->mv = x->best_sse_mv; + mbmi->need_to_clamp_mvs = x->need_to_clamp_best_mvs; + mv_col = x->best_sse_mv.as_mv.col; + mv_row = x->best_sse_mv.as_mv.row; + // Bias to zero_mv if small amount of motion. + // Note sse_diff_thresh is intialized to zero, so this ensures + // we will always choose zero_mv for denoising if + // zero_mv_see <= best_sse (i.e., sse_diff <= 0). + if ((unsigned int)(mv_row * mv_row + mv_col * mv_col) <= + NOISE_MOTION_THRESHOLD) { + sse_diff_thresh = (int)SSE_DIFF_THRESHOLD; + } + + if (frame == INTRA_FRAME || sse_diff <= sse_diff_thresh) { + /* + * Handle intra blocks as referring to last frame with zero motion + * and let the absolute pixel difference affect the filter factor. + * Also consider small amount of motion as being random walk due + * to noise, if it doesn't mean that we get a much bigger error. + * Note that any changes to the mode info only affects the + * denoising. + */ + x->denoise_zeromv = 1; + mbmi->ref_frame = x->best_zeromv_reference_frame; + + src = &denoiser->yv12_running_avg[zero_frame]; + + mbmi->mode = ZEROMV; + mbmi->mv.as_int = 0; + x->best_sse_inter_mode = ZEROMV; + x->best_sse_mv.as_int = 0; + best_sse = zero_mv_sse; + } + + mv_row = x->best_sse_mv.as_mv.row; + mv_col = x->best_sse_mv.as_mv.col; + motion_magnitude2 = mv_row * mv_row + mv_col * mv_col; + motion_threshold = + denoiser->denoise_pars.scale_motion_thresh * NOISE_MOTION_THRESHOLD; + + if (motion_magnitude2 < + denoiser->denoise_pars.scale_increase_filter * NOISE_MOTION_THRESHOLD) { + x->increase_denoising = 1; + } + + sse_thresh = denoiser->denoise_pars.scale_sse_thresh * SSE_THRESHOLD; + if (x->increase_denoising) { + sse_thresh = denoiser->denoise_pars.scale_sse_thresh * SSE_THRESHOLD_HIGH; + } + + if (best_sse > sse_thresh || motion_magnitude2 > motion_threshold) { + decision = COPY_BLOCK; + } + + // If block is considered skin, don't denoise if the block + // (1) is selected as non-zero motion for current frame, or + // (2) has not been selected as ZERO_LAST mode at least x past frames + // in a row. + // TODO(marpan): Parameter "x" should be varied with framerate. + // In particualar, should be reduced for layers (base layer/LAST). + if (x->is_skin && (consec_zero_last < 2 || motion_magnitude2 > 0)) { + decision = COPY_BLOCK; + } + + if (decision == FILTER_BLOCK) { + saved_pre = filter_xd->pre; + saved_dst = filter_xd->dst; + + /* Compensate the running average. */ + filter_xd->pre.y_buffer = src->y_buffer + recon_yoffset; + filter_xd->pre.u_buffer = src->u_buffer + recon_uvoffset; + filter_xd->pre.v_buffer = src->v_buffer + recon_uvoffset; + /* Write the compensated running average to the destination buffer. */ + filter_xd->dst.y_buffer = dst->y_buffer + recon_yoffset; + filter_xd->dst.u_buffer = dst->u_buffer + recon_uvoffset; + filter_xd->dst.v_buffer = dst->v_buffer + recon_uvoffset; + + if (!x->skip) { + vp8_build_inter_predictors_mb(filter_xd); + } else { + vp8_build_inter16x16_predictors_mb( + filter_xd, filter_xd->dst.y_buffer, filter_xd->dst.u_buffer, + filter_xd->dst.v_buffer, filter_xd->dst.y_stride, + filter_xd->dst.uv_stride); + } + filter_xd->pre = saved_pre; + filter_xd->dst = saved_dst; + *mbmi = saved_mbmi; + } + } else { + // zero_frame should always be 1 for real-time mode, as the + // ZEROMV mode is always checked, so we should never go into this branch. + // If case ZEROMV is not checked, then we will force no denoise (COPY). + decision = COPY_BLOCK; + } + + if (decision == FILTER_BLOCK) { + unsigned char *mc_running_avg_y = + denoiser->yv12_mc_running_avg.y_buffer + recon_yoffset; + int mc_avg_y_stride = denoiser->yv12_mc_running_avg.y_stride; + unsigned char *running_avg_y = + denoiser->yv12_running_avg[INTRA_FRAME].y_buffer + recon_yoffset; + int avg_y_stride = denoiser->yv12_running_avg[INTRA_FRAME].y_stride; + + /* Filter. */ + decision = vp8_denoiser_filter(mc_running_avg_y, mc_avg_y_stride, + running_avg_y, avg_y_stride, x->thismb, 16, + motion_magnitude2, x->increase_denoising); + denoiser->denoise_state[block_index] = + motion_magnitude2 > 0 ? kFilterNonZeroMV : kFilterZeroMV; + // Only denoise UV for zero motion, and if y channel was denoised. + if (denoiser->denoiser_mode != kDenoiserOnYOnly && motion_magnitude2 == 0 && + decision == FILTER_BLOCK) { + unsigned char *mc_running_avg_u = + denoiser->yv12_mc_running_avg.u_buffer + recon_uvoffset; + unsigned char *running_avg_u = + denoiser->yv12_running_avg[INTRA_FRAME].u_buffer + recon_uvoffset; + unsigned char *mc_running_avg_v = + denoiser->yv12_mc_running_avg.v_buffer + recon_uvoffset; + unsigned char *running_avg_v = + denoiser->yv12_running_avg[INTRA_FRAME].v_buffer + recon_uvoffset; + int mc_avg_uv_stride = denoiser->yv12_mc_running_avg.uv_stride; + int avg_uv_stride = denoiser->yv12_running_avg[INTRA_FRAME].uv_stride; + int signal_stride = x->block[16].src_stride; + decision_u = vp8_denoiser_filter_uv( + mc_running_avg_u, mc_avg_uv_stride, running_avg_u, avg_uv_stride, + x->block[16].src + *x->block[16].base_src, signal_stride, + motion_magnitude2, 0); + decision_v = vp8_denoiser_filter_uv( + mc_running_avg_v, mc_avg_uv_stride, running_avg_v, avg_uv_stride, + x->block[20].src + *x->block[20].base_src, signal_stride, + motion_magnitude2, 0); + } + } + if (decision == COPY_BLOCK) { + /* No filtering of this block; it differs too much from the predictor, + * or the motion vector magnitude is considered too big. + */ + x->denoise_zeromv = 0; + vp8_copy_mem16x16( + x->thismb, 16, + denoiser->yv12_running_avg[INTRA_FRAME].y_buffer + recon_yoffset, + denoiser->yv12_running_avg[INTRA_FRAME].y_stride); + denoiser->denoise_state[block_index] = kNoFilter; + } + if (denoiser->denoiser_mode != kDenoiserOnYOnly) { + if (decision_u == COPY_BLOCK) { + vp8_copy_mem8x8( + x->block[16].src + *x->block[16].base_src, x->block[16].src_stride, + denoiser->yv12_running_avg[INTRA_FRAME].u_buffer + recon_uvoffset, + denoiser->yv12_running_avg[INTRA_FRAME].uv_stride); + } + if (decision_v == COPY_BLOCK) { + vp8_copy_mem8x8( + x->block[20].src + *x->block[20].base_src, x->block[16].src_stride, + denoiser->yv12_running_avg[INTRA_FRAME].v_buffer + recon_uvoffset, + denoiser->yv12_running_avg[INTRA_FRAME].uv_stride); + } + } + // Option to selectively deblock the denoised signal, for y channel only. + if (apply_spatial_loop_filter) { + loop_filter_info lfi; + int apply_filter_col = 0; + int apply_filter_row = 0; + int apply_filter = 0; + int y_stride = denoiser->yv12_running_avg[INTRA_FRAME].y_stride; + int uv_stride = denoiser->yv12_running_avg[INTRA_FRAME].uv_stride; + + // Fix filter level to some nominal value for now. + int filter_level = 48; + + int hev_index = lfi_n->hev_thr_lut[INTER_FRAME][filter_level]; + lfi.mblim = lfi_n->mblim[filter_level]; + lfi.blim = lfi_n->blim[filter_level]; + lfi.lim = lfi_n->lim[filter_level]; + lfi.hev_thr = lfi_n->hev_thr[hev_index]; + + // Apply filter if there is a difference in the denoiser filter state + // between the current and left/top block, or if non-zero motion vector + // is used for the motion-compensated filtering. + if (mb_col > 0) { + apply_filter_col = + !((denoiser->denoise_state[block_index] == + denoiser->denoise_state[block_index - 1]) && + denoiser->denoise_state[block_index] != kFilterNonZeroMV); + if (apply_filter_col) { + // Filter left vertical edge. + apply_filter = 1; + vp8_loop_filter_mbv( + denoiser->yv12_running_avg[INTRA_FRAME].y_buffer + recon_yoffset, + NULL, NULL, y_stride, uv_stride, &lfi); + } + } + if (mb_row > 0) { + apply_filter_row = + !((denoiser->denoise_state[block_index] == + denoiser->denoise_state[block_index - denoiser->num_mb_cols]) && + denoiser->denoise_state[block_index] != kFilterNonZeroMV); + if (apply_filter_row) { + // Filter top horizontal edge. + apply_filter = 1; + vp8_loop_filter_mbh( + denoiser->yv12_running_avg[INTRA_FRAME].y_buffer + recon_yoffset, + NULL, NULL, y_stride, uv_stride, &lfi); + } + } + if (apply_filter) { + // Update the signal block |x|. Pixel changes are only to top and/or + // left boundary pixels: can we avoid full block copy here. + vp8_copy_mem16x16( + denoiser->yv12_running_avg[INTRA_FRAME].y_buffer + recon_yoffset, + y_stride, x->thismb, 16); + } + } +} |