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Diffstat (limited to 'media/libaom/src/av1/encoder/pickrst.c')
| -rw-r--r-- | media/libaom/src/av1/encoder/pickrst.c | 1362 |
1 files changed, 1362 insertions, 0 deletions
diff --git a/media/libaom/src/av1/encoder/pickrst.c b/media/libaom/src/av1/encoder/pickrst.c new file mode 100644 index 000000000..e7804f6b4 --- /dev/null +++ b/media/libaom/src/av1/encoder/pickrst.c @@ -0,0 +1,1362 @@ +/* + * Copyright (c) 2016, 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 <float.h> +#include <limits.h> +#include <math.h> + +#include "config/aom_scale_rtcd.h" +#include "config/av1_rtcd.h" + +#include "aom_dsp/aom_dsp_common.h" +#include "aom_dsp/binary_codes_writer.h" +#include "aom_dsp/psnr.h" +#include "aom_mem/aom_mem.h" +#include "aom_ports/mem.h" +#include "aom_ports/system_state.h" +#include "av1/common/onyxc_int.h" +#include "av1/common/quant_common.h" +#include "av1/common/restoration.h" + +#include "av1/encoder/av1_quantize.h" +#include "av1/encoder/encoder.h" +#include "av1/encoder/mathutils.h" +#include "av1/encoder/picklpf.h" +#include "av1/encoder/pickrst.h" + +// When set to RESTORE_WIENER or RESTORE_SGRPROJ only those are allowed. +// When set to RESTORE_TYPES we allow switchable. +static const RestorationType force_restore_type = RESTORE_TYPES; + +// Number of Wiener iterations +#define NUM_WIENER_ITERS 5 + +// Penalty factor for use of dual sgr +#define DUAL_SGR_PENALTY_MULT 0.01 + +const int frame_level_restore_bits[RESTORE_TYPES] = { 2, 2, 2, 2 }; + +typedef int64_t (*sse_extractor_type)(const YV12_BUFFER_CONFIG *a, + const YV12_BUFFER_CONFIG *b); +typedef int64_t (*sse_part_extractor_type)(const YV12_BUFFER_CONFIG *a, + const YV12_BUFFER_CONFIG *b, + int hstart, int width, int vstart, + int height); + +#define NUM_EXTRACTORS (3 * (1 + 1)) + +static const sse_part_extractor_type sse_part_extractors[NUM_EXTRACTORS] = { + aom_get_y_sse_part, aom_get_u_sse_part, + aom_get_v_sse_part, aom_highbd_get_y_sse_part, + aom_highbd_get_u_sse_part, aom_highbd_get_v_sse_part, +}; + +static int64_t sse_restoration_unit(const RestorationTileLimits *limits, + const YV12_BUFFER_CONFIG *src, + const YV12_BUFFER_CONFIG *dst, int plane, + int highbd) { + return sse_part_extractors[3 * highbd + plane]( + src, dst, limits->h_start, limits->h_end - limits->h_start, + limits->v_start, limits->v_end - limits->v_start); +} + +typedef struct { + // The best coefficients for Wiener or Sgrproj restoration + WienerInfo wiener; + SgrprojInfo sgrproj; + + // The sum of squared errors for this rtype. + int64_t sse[RESTORE_SWITCHABLE_TYPES]; + + // The rtype to use for this unit given a frame rtype as + // index. Indices: WIENER, SGRPROJ, SWITCHABLE. + RestorationType best_rtype[RESTORE_TYPES - 1]; +} RestUnitSearchInfo; + +typedef struct { + const YV12_BUFFER_CONFIG *src; + YV12_BUFFER_CONFIG *dst; + + const AV1_COMMON *cm; + const MACROBLOCK *x; + int plane; + int plane_width; + int plane_height; + RestUnitSearchInfo *rusi; + + // Speed features + const SPEED_FEATURES *sf; + + uint8_t *dgd_buffer; + int dgd_stride; + const uint8_t *src_buffer; + int src_stride; + + // sse and bits are initialised by reset_rsc in search_rest_type + int64_t sse; + int64_t bits; + int tile_y0, tile_stripe0; + + // sgrproj and wiener are initialised by rsc_on_tile when starting the first + // tile in the frame. + SgrprojInfo sgrproj; + WienerInfo wiener; + AV1PixelRect tile_rect; +} RestSearchCtxt; + +static void rsc_on_tile(int tile_row, int tile_col, void *priv) { + (void)tile_col; + + RestSearchCtxt *rsc = (RestSearchCtxt *)priv; + set_default_sgrproj(&rsc->sgrproj); + set_default_wiener(&rsc->wiener); + + rsc->tile_stripe0 = + (tile_row == 0) ? 0 : rsc->cm->rst_end_stripe[tile_row - 1]; +} + +static void reset_rsc(RestSearchCtxt *rsc) { + rsc->sse = 0; + rsc->bits = 0; +} + +static void init_rsc(const YV12_BUFFER_CONFIG *src, const AV1_COMMON *cm, + const MACROBLOCK *x, const SPEED_FEATURES *sf, int plane, + RestUnitSearchInfo *rusi, YV12_BUFFER_CONFIG *dst, + RestSearchCtxt *rsc) { + rsc->src = src; + rsc->dst = dst; + rsc->cm = cm; + rsc->x = x; + rsc->plane = plane; + rsc->rusi = rusi; + rsc->sf = sf; + + const YV12_BUFFER_CONFIG *dgd = cm->frame_to_show; + const int is_uv = plane != AOM_PLANE_Y; + rsc->plane_width = src->crop_widths[is_uv]; + rsc->plane_height = src->crop_heights[is_uv]; + rsc->src_buffer = src->buffers[plane]; + rsc->src_stride = src->strides[is_uv]; + rsc->dgd_buffer = dgd->buffers[plane]; + rsc->dgd_stride = dgd->strides[is_uv]; + rsc->tile_rect = av1_whole_frame_rect(cm, is_uv); + assert(src->crop_widths[is_uv] == dgd->crop_widths[is_uv]); + assert(src->crop_heights[is_uv] == dgd->crop_heights[is_uv]); +} + +static int64_t try_restoration_unit(const RestSearchCtxt *rsc, + const RestorationTileLimits *limits, + const AV1PixelRect *tile_rect, + const RestorationUnitInfo *rui) { + const AV1_COMMON *const cm = rsc->cm; + const int plane = rsc->plane; + const int is_uv = plane > 0; + const RestorationInfo *rsi = &cm->rst_info[plane]; + RestorationLineBuffers rlbs; + const int bit_depth = cm->seq_params.bit_depth; + const int highbd = cm->seq_params.use_highbitdepth; + + const YV12_BUFFER_CONFIG *fts = cm->frame_to_show; + // TODO(yunqing): For now, only use optimized LR filter in decoder. Can be + // also used in encoder. + const int optimized_lr = 0; + + av1_loop_restoration_filter_unit( + limits, rui, &rsi->boundaries, &rlbs, tile_rect, rsc->tile_stripe0, + is_uv && cm->seq_params.subsampling_x, + is_uv && cm->seq_params.subsampling_y, highbd, bit_depth, + fts->buffers[plane], fts->strides[is_uv], rsc->dst->buffers[plane], + rsc->dst->strides[is_uv], cm->rst_tmpbuf, optimized_lr); + + return sse_restoration_unit(limits, rsc->src, rsc->dst, plane, highbd); +} + +int64_t av1_lowbd_pixel_proj_error_c(const uint8_t *src8, int width, int height, + int src_stride, const uint8_t *dat8, + int dat_stride, int32_t *flt0, + int flt0_stride, int32_t *flt1, + int flt1_stride, int xq[2], + const sgr_params_type *params) { + int i, j; + const uint8_t *src = src8; + const uint8_t *dat = dat8; + int64_t err = 0; + if (params->r[0] > 0 && params->r[1] > 0) { + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + assert(flt1[j] < (1 << 15) && flt1[j] > -(1 << 15)); + assert(flt0[j] < (1 << 15) && flt0[j] > -(1 << 15)); + const int32_t u = (int32_t)(dat[j] << SGRPROJ_RST_BITS); + int32_t v = u << SGRPROJ_PRJ_BITS; + v += xq[0] * (flt0[j] - u) + xq[1] * (flt1[j] - u); + const int32_t e = + ROUND_POWER_OF_TWO(v, SGRPROJ_RST_BITS + SGRPROJ_PRJ_BITS) - src[j]; + err += e * e; + } + dat += dat_stride; + src += src_stride; + flt0 += flt0_stride; + flt1 += flt1_stride; + } + } else if (params->r[0] > 0) { + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + assert(flt0[j] < (1 << 15) && flt0[j] > -(1 << 15)); + const int32_t u = (int32_t)(dat[j] << SGRPROJ_RST_BITS); + int32_t v = u << SGRPROJ_PRJ_BITS; + v += xq[0] * (flt0[j] - u); + const int32_t e = + ROUND_POWER_OF_TWO(v, SGRPROJ_RST_BITS + SGRPROJ_PRJ_BITS) - src[j]; + err += e * e; + } + dat += dat_stride; + src += src_stride; + flt0 += flt0_stride; + } + } else if (params->r[1] > 0) { + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + assert(flt1[j] < (1 << 15) && flt1[j] > -(1 << 15)); + const int32_t u = (int32_t)(dat[j] << SGRPROJ_RST_BITS); + int32_t v = u << SGRPROJ_PRJ_BITS; + v += xq[1] * (flt1[j] - u); + const int32_t e = + ROUND_POWER_OF_TWO(v, SGRPROJ_RST_BITS + SGRPROJ_PRJ_BITS) - src[j]; + err += e * e; + } + dat += dat_stride; + src += src_stride; + flt1 += flt1_stride; + } + } else { + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + const int32_t e = (int32_t)(dat[j]) - src[j]; + err += e * e; + } + dat += dat_stride; + src += src_stride; + } + } + + return err; +} + +static int64_t get_pixel_proj_error(const uint8_t *src8, int width, int height, + int src_stride, const uint8_t *dat8, + int dat_stride, int use_highbitdepth, + int32_t *flt0, int flt0_stride, + int32_t *flt1, int flt1_stride, int *xqd, + const sgr_params_type *params) { + int i, j; + int64_t err = 0; + int xq[2]; + decode_xq(xqd, xq, params); + if (!use_highbitdepth) { + err = av1_lowbd_pixel_proj_error(src8, width, height, src_stride, dat8, + dat_stride, flt0, flt0_stride, flt1, + flt1_stride, xq, params); + } else { + const uint16_t *src = CONVERT_TO_SHORTPTR(src8); + const uint16_t *dat = CONVERT_TO_SHORTPTR(dat8); + const int32_t half = 1 << (SGRPROJ_RST_BITS + SGRPROJ_PRJ_BITS - 1); + if (params->r[0] > 0 && params->r[1] > 0) { + int xq0 = xq[0]; + int xq1 = xq[1]; + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + const int32_t d = dat[j]; + const int32_t s = src[j]; + const int32_t u = (int32_t)(d << SGRPROJ_RST_BITS); + int32_t v0 = flt0[j] - u; + int32_t v1 = flt1[j] - u; + int32_t v = half; + v += xq0 * v0; + v += xq1 * v1; + const int32_t e = + (v >> (SGRPROJ_RST_BITS + SGRPROJ_PRJ_BITS)) + d - s; + err += e * e; + } + dat += dat_stride; + flt0 += flt0_stride; + flt1 += flt1_stride; + src += src_stride; + } + } else if (params->r[0] > 0 || params->r[1] > 0) { + int exq; + int32_t *flt; + int flt_stride; + if (params->r[0] > 0) { + exq = xq[0]; + flt = flt0; + flt_stride = flt0_stride; + } else { + exq = xq[1]; + flt = flt1; + flt_stride = flt1_stride; + } + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + const int32_t d = dat[j]; + const int32_t s = src[j]; + const int32_t u = (int32_t)(d << SGRPROJ_RST_BITS); + int32_t v = half; + v += exq * (flt[j] - u); + const int32_t e = + (v >> (SGRPROJ_RST_BITS + SGRPROJ_PRJ_BITS)) + d - s; + err += e * e; + } + dat += dat_stride; + flt += flt_stride; + src += src_stride; + } + } else { + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + const int32_t d = dat[j]; + const int32_t s = src[j]; + const int32_t e = d - s; + err += e * e; + } + dat += dat_stride; + src += src_stride; + } + } + } + return err; +} + +#define USE_SGRPROJ_REFINEMENT_SEARCH 1 +static int64_t finer_search_pixel_proj_error( + const uint8_t *src8, int width, int height, int src_stride, + const uint8_t *dat8, int dat_stride, int use_highbitdepth, int32_t *flt0, + int flt0_stride, int32_t *flt1, int flt1_stride, int start_step, int *xqd, + const sgr_params_type *params) { + int64_t err = get_pixel_proj_error( + src8, width, height, src_stride, dat8, dat_stride, use_highbitdepth, flt0, + flt0_stride, flt1, flt1_stride, xqd, params); + (void)start_step; +#if USE_SGRPROJ_REFINEMENT_SEARCH + int64_t err2; + int tap_min[] = { SGRPROJ_PRJ_MIN0, SGRPROJ_PRJ_MIN1 }; + int tap_max[] = { SGRPROJ_PRJ_MAX0, SGRPROJ_PRJ_MAX1 }; + for (int s = start_step; s >= 1; s >>= 1) { + for (int p = 0; p < 2; ++p) { + if ((params->r[0] == 0 && p == 0) || (params->r[1] == 0 && p == 1)) { + continue; + } + int skip = 0; + do { + if (xqd[p] - s >= tap_min[p]) { + xqd[p] -= s; + err2 = + get_pixel_proj_error(src8, width, height, src_stride, dat8, + dat_stride, use_highbitdepth, flt0, + flt0_stride, flt1, flt1_stride, xqd, params); + if (err2 > err) { + xqd[p] += s; + } else { + err = err2; + skip = 1; + // At the highest step size continue moving in the same direction + if (s == start_step) continue; + } + } + break; + } while (1); + if (skip) break; + do { + if (xqd[p] + s <= tap_max[p]) { + xqd[p] += s; + err2 = + get_pixel_proj_error(src8, width, height, src_stride, dat8, + dat_stride, use_highbitdepth, flt0, + flt0_stride, flt1, flt1_stride, xqd, params); + if (err2 > err) { + xqd[p] -= s; + } else { + err = err2; + // At the highest step size continue moving in the same direction + if (s == start_step) continue; + } + } + break; + } while (1); + } + } +#endif // USE_SGRPROJ_REFINEMENT_SEARCH + return err; +} + +static void get_proj_subspace(const uint8_t *src8, int width, int height, + int src_stride, const uint8_t *dat8, + int dat_stride, int use_highbitdepth, + int32_t *flt0, int flt0_stride, int32_t *flt1, + int flt1_stride, int *xq, + const sgr_params_type *params) { + int i, j; + double H[2][2] = { { 0, 0 }, { 0, 0 } }; + double C[2] = { 0, 0 }; + double Det; + double x[2]; + const int size = width * height; + + aom_clear_system_state(); + + // Default + xq[0] = 0; + xq[1] = 0; + if (!use_highbitdepth) { + const uint8_t *src = src8; + const uint8_t *dat = dat8; + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + const double u = (double)(dat[i * dat_stride + j] << SGRPROJ_RST_BITS); + const double s = + (double)(src[i * src_stride + j] << SGRPROJ_RST_BITS) - u; + const double f1 = + (params->r[0] > 0) ? (double)flt0[i * flt0_stride + j] - u : 0; + const double f2 = + (params->r[1] > 0) ? (double)flt1[i * flt1_stride + j] - u : 0; + H[0][0] += f1 * f1; + H[1][1] += f2 * f2; + H[0][1] += f1 * f2; + C[0] += f1 * s; + C[1] += f2 * s; + } + } + } else { + const uint16_t *src = CONVERT_TO_SHORTPTR(src8); + const uint16_t *dat = CONVERT_TO_SHORTPTR(dat8); + for (i = 0; i < height; ++i) { + for (j = 0; j < width; ++j) { + const double u = (double)(dat[i * dat_stride + j] << SGRPROJ_RST_BITS); + const double s = + (double)(src[i * src_stride + j] << SGRPROJ_RST_BITS) - u; + const double f1 = + (params->r[0] > 0) ? (double)flt0[i * flt0_stride + j] - u : 0; + const double f2 = + (params->r[1] > 0) ? (double)flt1[i * flt1_stride + j] - u : 0; + H[0][0] += f1 * f1; + H[1][1] += f2 * f2; + H[0][1] += f1 * f2; + C[0] += f1 * s; + C[1] += f2 * s; + } + } + } + H[0][0] /= size; + H[0][1] /= size; + H[1][1] /= size; + H[1][0] = H[0][1]; + C[0] /= size; + C[1] /= size; + if (params->r[0] == 0) { + // H matrix is now only the scalar H[1][1] + // C vector is now only the scalar C[1] + Det = H[1][1]; + if (Det < 1e-8) return; // ill-posed, return default values + x[0] = 0; + x[1] = C[1] / Det; + + xq[0] = 0; + xq[1] = (int)rint(x[1] * (1 << SGRPROJ_PRJ_BITS)); + } else if (params->r[1] == 0) { + // H matrix is now only the scalar H[0][0] + // C vector is now only the scalar C[0] + Det = H[0][0]; + if (Det < 1e-8) return; // ill-posed, return default values + x[0] = C[0] / Det; + x[1] = 0; + + xq[0] = (int)rint(x[0] * (1 << SGRPROJ_PRJ_BITS)); + xq[1] = 0; + } else { + Det = (H[0][0] * H[1][1] - H[0][1] * H[1][0]); + if (Det < 1e-8) return; // ill-posed, return default values + x[0] = (H[1][1] * C[0] - H[0][1] * C[1]) / Det; + x[1] = (H[0][0] * C[1] - H[1][0] * C[0]) / Det; + + xq[0] = (int)rint(x[0] * (1 << SGRPROJ_PRJ_BITS)); + xq[1] = (int)rint(x[1] * (1 << SGRPROJ_PRJ_BITS)); + } +} + +void encode_xq(int *xq, int *xqd, const sgr_params_type *params) { + if (params->r[0] == 0) { + xqd[0] = 0; + xqd[1] = clamp((1 << SGRPROJ_PRJ_BITS) - xq[1], SGRPROJ_PRJ_MIN1, + SGRPROJ_PRJ_MAX1); + } else if (params->r[1] == 0) { + xqd[0] = clamp(xq[0], SGRPROJ_PRJ_MIN0, SGRPROJ_PRJ_MAX0); + xqd[1] = clamp((1 << SGRPROJ_PRJ_BITS) - xqd[0], SGRPROJ_PRJ_MIN1, + SGRPROJ_PRJ_MAX1); + } else { + xqd[0] = clamp(xq[0], SGRPROJ_PRJ_MIN0, SGRPROJ_PRJ_MAX0); + xqd[1] = clamp((1 << SGRPROJ_PRJ_BITS) - xqd[0] - xq[1], SGRPROJ_PRJ_MIN1, + SGRPROJ_PRJ_MAX1); + } +} + +// Apply the self-guided filter across an entire restoration unit. +static void apply_sgr(int sgr_params_idx, const uint8_t *dat8, int width, + int height, int dat_stride, int use_highbd, int bit_depth, + int pu_width, int pu_height, int32_t *flt0, int32_t *flt1, + int flt_stride) { + for (int i = 0; i < height; i += pu_height) { + const int h = AOMMIN(pu_height, height - i); + int32_t *flt0_row = flt0 + i * flt_stride; + int32_t *flt1_row = flt1 + i * flt_stride; + const uint8_t *dat8_row = dat8 + i * dat_stride; + + // Iterate over the stripe in blocks of width pu_width + for (int j = 0; j < width; j += pu_width) { + const int w = AOMMIN(pu_width, width - j); + const int ret = av1_selfguided_restoration( + dat8_row + j, w, h, dat_stride, flt0_row + j, flt1_row + j, + flt_stride, sgr_params_idx, bit_depth, use_highbd); + (void)ret; + assert(!ret); + } + } +} + +static SgrprojInfo search_selfguided_restoration( + const uint8_t *dat8, int width, int height, int dat_stride, + const uint8_t *src8, int src_stride, int use_highbitdepth, int bit_depth, + int pu_width, int pu_height, int32_t *rstbuf) { + int32_t *flt0 = rstbuf; + int32_t *flt1 = flt0 + RESTORATION_UNITPELS_MAX; + int ep, bestep = 0; + int64_t besterr = -1; + int exqd[2], bestxqd[2] = { 0, 0 }; + int flt_stride = ((width + 7) & ~7) + 8; + assert(pu_width == (RESTORATION_PROC_UNIT_SIZE >> 1) || + pu_width == RESTORATION_PROC_UNIT_SIZE); + assert(pu_height == (RESTORATION_PROC_UNIT_SIZE >> 1) || + pu_height == RESTORATION_PROC_UNIT_SIZE); + + for (ep = 0; ep < SGRPROJ_PARAMS; ep++) { + int exq[2]; + apply_sgr(ep, dat8, width, height, dat_stride, use_highbitdepth, bit_depth, + pu_width, pu_height, flt0, flt1, flt_stride); + aom_clear_system_state(); + const sgr_params_type *const params = &sgr_params[ep]; + get_proj_subspace(src8, width, height, src_stride, dat8, dat_stride, + use_highbitdepth, flt0, flt_stride, flt1, flt_stride, exq, + params); + aom_clear_system_state(); + encode_xq(exq, exqd, params); + int64_t err = finer_search_pixel_proj_error( + src8, width, height, src_stride, dat8, dat_stride, use_highbitdepth, + flt0, flt_stride, flt1, flt_stride, 2, exqd, params); + if (besterr == -1 || err < besterr) { + bestep = ep; + besterr = err; + bestxqd[0] = exqd[0]; + bestxqd[1] = exqd[1]; + } + } + + SgrprojInfo ret; + ret.ep = bestep; + ret.xqd[0] = bestxqd[0]; + ret.xqd[1] = bestxqd[1]; + return ret; +} + +static int count_sgrproj_bits(SgrprojInfo *sgrproj_info, + SgrprojInfo *ref_sgrproj_info) { + int bits = SGRPROJ_PARAMS_BITS; + const sgr_params_type *params = &sgr_params[sgrproj_info->ep]; + if (params->r[0] > 0) + bits += aom_count_primitive_refsubexpfin( + SGRPROJ_PRJ_MAX0 - SGRPROJ_PRJ_MIN0 + 1, SGRPROJ_PRJ_SUBEXP_K, + ref_sgrproj_info->xqd[0] - SGRPROJ_PRJ_MIN0, + sgrproj_info->xqd[0] - SGRPROJ_PRJ_MIN0); + if (params->r[1] > 0) + bits += aom_count_primitive_refsubexpfin( + SGRPROJ_PRJ_MAX1 - SGRPROJ_PRJ_MIN1 + 1, SGRPROJ_PRJ_SUBEXP_K, + ref_sgrproj_info->xqd[1] - SGRPROJ_PRJ_MIN1, + sgrproj_info->xqd[1] - SGRPROJ_PRJ_MIN1); + return bits; +} + +static void search_sgrproj(const RestorationTileLimits *limits, + const AV1PixelRect *tile, int rest_unit_idx, + void *priv, int32_t *tmpbuf, + RestorationLineBuffers *rlbs) { + (void)rlbs; + RestSearchCtxt *rsc = (RestSearchCtxt *)priv; + RestUnitSearchInfo *rusi = &rsc->rusi[rest_unit_idx]; + + const MACROBLOCK *const x = rsc->x; + const AV1_COMMON *const cm = rsc->cm; + const int highbd = cm->seq_params.use_highbitdepth; + const int bit_depth = cm->seq_params.bit_depth; + + uint8_t *dgd_start = + rsc->dgd_buffer + limits->v_start * rsc->dgd_stride + limits->h_start; + const uint8_t *src_start = + rsc->src_buffer + limits->v_start * rsc->src_stride + limits->h_start; + + const int is_uv = rsc->plane > 0; + const int ss_x = is_uv && cm->seq_params.subsampling_x; + const int ss_y = is_uv && cm->seq_params.subsampling_y; + const int procunit_width = RESTORATION_PROC_UNIT_SIZE >> ss_x; + const int procunit_height = RESTORATION_PROC_UNIT_SIZE >> ss_y; + + rusi->sgrproj = search_selfguided_restoration( + dgd_start, limits->h_end - limits->h_start, + limits->v_end - limits->v_start, rsc->dgd_stride, src_start, + rsc->src_stride, highbd, bit_depth, procunit_width, procunit_height, + tmpbuf); + + RestorationUnitInfo rui; + rui.restoration_type = RESTORE_SGRPROJ; + rui.sgrproj_info = rusi->sgrproj; + + rusi->sse[RESTORE_SGRPROJ] = try_restoration_unit(rsc, limits, tile, &rui); + + const int64_t bits_none = x->sgrproj_restore_cost[0]; + const int64_t bits_sgr = x->sgrproj_restore_cost[1] + + (count_sgrproj_bits(&rusi->sgrproj, &rsc->sgrproj) + << AV1_PROB_COST_SHIFT); + + double cost_none = + RDCOST_DBL(x->rdmult, bits_none >> 4, rusi->sse[RESTORE_NONE]); + double cost_sgr = + RDCOST_DBL(x->rdmult, bits_sgr >> 4, rusi->sse[RESTORE_SGRPROJ]); + if (rusi->sgrproj.ep < 10) + cost_sgr *= (1 + DUAL_SGR_PENALTY_MULT * rsc->sf->dual_sgr_penalty_level); + + RestorationType rtype = + (cost_sgr < cost_none) ? RESTORE_SGRPROJ : RESTORE_NONE; + rusi->best_rtype[RESTORE_SGRPROJ - 1] = rtype; + + rsc->sse += rusi->sse[rtype]; + rsc->bits += (cost_sgr < cost_none) ? bits_sgr : bits_none; + if (cost_sgr < cost_none) rsc->sgrproj = rusi->sgrproj; +} + +void av1_compute_stats_c(int wiener_win, const uint8_t *dgd, const uint8_t *src, + int h_start, int h_end, int v_start, int v_end, + int dgd_stride, int src_stride, double *M, double *H) { + int i, j, k, l; + double Y[WIENER_WIN2]; + const int wiener_win2 = wiener_win * wiener_win; + const int wiener_halfwin = (wiener_win >> 1); + const double avg = + find_average(dgd, h_start, h_end, v_start, v_end, dgd_stride); + + memset(M, 0, sizeof(*M) * wiener_win2); + memset(H, 0, sizeof(*H) * wiener_win2 * wiener_win2); + for (i = v_start; i < v_end; i++) { + for (j = h_start; j < h_end; j++) { + const double X = (double)src[i * src_stride + j] - avg; + int idx = 0; + for (k = -wiener_halfwin; k <= wiener_halfwin; k++) { + for (l = -wiener_halfwin; l <= wiener_halfwin; l++) { + Y[idx] = (double)dgd[(i + l) * dgd_stride + (j + k)] - avg; + idx++; + } + } + assert(idx == wiener_win2); + for (k = 0; k < wiener_win2; ++k) { + M[k] += Y[k] * X; + for (l = k; l < wiener_win2; ++l) { + // H is a symmetric matrix, so we only need to fill out the upper + // triangle here. We can copy it down to the lower triangle outside + // the (i, j) loops. + H[k * wiener_win2 + l] += Y[k] * Y[l]; + } + } + } + } + for (k = 0; k < wiener_win2; ++k) { + for (l = k + 1; l < wiener_win2; ++l) { + H[l * wiener_win2 + k] = H[k * wiener_win2 + l]; + } + } +} + +static double find_average_highbd(const uint16_t *src, int h_start, int h_end, + int v_start, int v_end, int stride) { + uint64_t sum = 0; + double avg = 0; + int i, j; + aom_clear_system_state(); + for (i = v_start; i < v_end; i++) + for (j = h_start; j < h_end; j++) sum += src[i * stride + j]; + avg = (double)sum / ((v_end - v_start) * (h_end - h_start)); + return avg; +} + +static AOM_FORCE_INLINE void compute_stats_highbd( + int wiener_win, const uint8_t *dgd8, const uint8_t *src8, int h_start, + int h_end, int v_start, int v_end, int dgd_stride, int src_stride, + double *M, double *H) { + int i, j, k, l; + double Y[WIENER_WIN2]; + const int wiener_win2 = wiener_win * wiener_win; + const int wiener_halfwin = (wiener_win >> 1); + const uint16_t *src = CONVERT_TO_SHORTPTR(src8); + const uint16_t *dgd = CONVERT_TO_SHORTPTR(dgd8); + const double avg = + find_average_highbd(dgd, h_start, h_end, v_start, v_end, dgd_stride); + + memset(M, 0, sizeof(*M) * wiener_win2); + memset(H, 0, sizeof(*H) * wiener_win2 * wiener_win2); + for (i = v_start; i < v_end; i++) { + for (j = h_start; j < h_end; j++) { + const double X = (double)src[i * src_stride + j] - avg; + int idx = 0; + for (k = -wiener_halfwin; k <= wiener_halfwin; k++) { + for (l = -wiener_halfwin; l <= wiener_halfwin; l++) { + Y[idx] = (double)dgd[(i + l) * dgd_stride + (j + k)] - avg; + idx++; + } + } + assert(idx == wiener_win2); + for (k = 0; k < wiener_win2; ++k) { + double Yk = Y[k]; + M[k] += Yk * X; + double *H2 = &H[k * wiener_win2]; + H2[k] += Yk * Yk; + for (l = k + 1; l < wiener_win2; ++l) { + // H is a symmetric matrix, so we only need to fill out the upper + // triangle here. We can copy it down to the lower triangle outside + // the (i, j) loops. + H2[l] += Yk * Y[l]; + } + } + } + } + for (k = 0; k < wiener_win2; ++k) { + for (l = k + 1; l < wiener_win2; ++l) { + H[l * wiener_win2 + k] = H[k * wiener_win2 + l]; + } + } +} + +static INLINE int wrap_index(int i, int wiener_win) { + const int wiener_halfwin1 = (wiener_win >> 1) + 1; + return (i >= wiener_halfwin1 ? wiener_win - 1 - i : i); +} + +// Fix vector b, update vector a +static void update_a_sep_sym(int wiener_win, double **Mc, double **Hc, + double *a, double *b) { + int i, j; + double S[WIENER_WIN]; + double A[WIENER_HALFWIN1], B[WIENER_HALFWIN1 * WIENER_HALFWIN1]; + const int wiener_win2 = wiener_win * wiener_win; + const int wiener_halfwin1 = (wiener_win >> 1) + 1; + memset(A, 0, sizeof(A)); + memset(B, 0, sizeof(B)); + for (i = 0; i < wiener_win; i++) { + for (j = 0; j < wiener_win; ++j) { + const int jj = wrap_index(j, wiener_win); + A[jj] += Mc[i][j] * b[i]; + } + } + for (i = 0; i < wiener_win; i++) { + for (j = 0; j < wiener_win; j++) { + int k, l; + for (k = 0; k < wiener_win; ++k) + for (l = 0; l < wiener_win; ++l) { + const int kk = wrap_index(k, wiener_win); + const int ll = wrap_index(l, wiener_win); + B[ll * wiener_halfwin1 + kk] += + Hc[j * wiener_win + i][k * wiener_win2 + l] * b[i] * b[j]; + } + } + } + // Normalization enforcement in the system of equations itself + for (i = 0; i < wiener_halfwin1 - 1; ++i) + A[i] -= + A[wiener_halfwin1 - 1] * 2 + + B[i * wiener_halfwin1 + wiener_halfwin1 - 1] - + 2 * B[(wiener_halfwin1 - 1) * wiener_halfwin1 + (wiener_halfwin1 - 1)]; + for (i = 0; i < wiener_halfwin1 - 1; ++i) + for (j = 0; j < wiener_halfwin1 - 1; ++j) + B[i * wiener_halfwin1 + j] -= + 2 * (B[i * wiener_halfwin1 + (wiener_halfwin1 - 1)] + + B[(wiener_halfwin1 - 1) * wiener_halfwin1 + j] - + 2 * B[(wiener_halfwin1 - 1) * wiener_halfwin1 + + (wiener_halfwin1 - 1)]); + if (linsolve(wiener_halfwin1 - 1, B, wiener_halfwin1, A, S)) { + S[wiener_halfwin1 - 1] = 1.0; + for (i = wiener_halfwin1; i < wiener_win; ++i) { + S[i] = S[wiener_win - 1 - i]; + S[wiener_halfwin1 - 1] -= 2 * S[i]; + } + memcpy(a, S, wiener_win * sizeof(*a)); + } +} + +// Fix vector a, update vector b +static void update_b_sep_sym(int wiener_win, double **Mc, double **Hc, + double *a, double *b) { + int i, j; + double S[WIENER_WIN]; + double A[WIENER_HALFWIN1], B[WIENER_HALFWIN1 * WIENER_HALFWIN1]; + const int wiener_win2 = wiener_win * wiener_win; + const int wiener_halfwin1 = (wiener_win >> 1) + 1; + memset(A, 0, sizeof(A)); + memset(B, 0, sizeof(B)); + for (i = 0; i < wiener_win; i++) { + const int ii = wrap_index(i, wiener_win); + for (j = 0; j < wiener_win; j++) A[ii] += Mc[i][j] * a[j]; + } + + for (i = 0; i < wiener_win; i++) { + for (j = 0; j < wiener_win; j++) { + const int ii = wrap_index(i, wiener_win); + const int jj = wrap_index(j, wiener_win); + int k, l; + for (k = 0; k < wiener_win; ++k) + for (l = 0; l < wiener_win; ++l) + B[jj * wiener_halfwin1 + ii] += + Hc[i * wiener_win + j][k * wiener_win2 + l] * a[k] * a[l]; + } + } + // Normalization enforcement in the system of equations itself + for (i = 0; i < wiener_halfwin1 - 1; ++i) + A[i] -= + A[wiener_halfwin1 - 1] * 2 + + B[i * wiener_halfwin1 + wiener_halfwin1 - 1] - + 2 * B[(wiener_halfwin1 - 1) * wiener_halfwin1 + (wiener_halfwin1 - 1)]; + for (i = 0; i < wiener_halfwin1 - 1; ++i) + for (j = 0; j < wiener_halfwin1 - 1; ++j) + B[i * wiener_halfwin1 + j] -= + 2 * (B[i * wiener_halfwin1 + (wiener_halfwin1 - 1)] + + B[(wiener_halfwin1 - 1) * wiener_halfwin1 + j] - + 2 * B[(wiener_halfwin1 - 1) * wiener_halfwin1 + + (wiener_halfwin1 - 1)]); + if (linsolve(wiener_halfwin1 - 1, B, wiener_halfwin1, A, S)) { + S[wiener_halfwin1 - 1] = 1.0; + for (i = wiener_halfwin1; i < wiener_win; ++i) { + S[i] = S[wiener_win - 1 - i]; + S[wiener_halfwin1 - 1] -= 2 * S[i]; + } + memcpy(b, S, wiener_win * sizeof(*b)); + } +} + +static int wiener_decompose_sep_sym(int wiener_win, double *M, double *H, + double *a, double *b) { + static const int init_filt[WIENER_WIN] = { + WIENER_FILT_TAP0_MIDV, WIENER_FILT_TAP1_MIDV, WIENER_FILT_TAP2_MIDV, + WIENER_FILT_TAP3_MIDV, WIENER_FILT_TAP2_MIDV, WIENER_FILT_TAP1_MIDV, + WIENER_FILT_TAP0_MIDV, + }; + double *Hc[WIENER_WIN2]; + double *Mc[WIENER_WIN]; + int i, j, iter; + const int plane_off = (WIENER_WIN - wiener_win) >> 1; + const int wiener_win2 = wiener_win * wiener_win; + for (i = 0; i < wiener_win; i++) { + a[i] = b[i] = (double)init_filt[i + plane_off] / WIENER_FILT_STEP; + } + for (i = 0; i < wiener_win; i++) { + Mc[i] = M + i * wiener_win; + for (j = 0; j < wiener_win; j++) { + Hc[i * wiener_win + j] = + H + i * wiener_win * wiener_win2 + j * wiener_win; + } + } + + iter = 1; + while (iter < NUM_WIENER_ITERS) { + update_a_sep_sym(wiener_win, Mc, Hc, a, b); + update_b_sep_sym(wiener_win, Mc, Hc, a, b); + iter++; + } + return 1; +} + +// Computes the function x'*H*x - x'*M for the learned 2D filter x, and compares +// against identity filters; Final score is defined as the difference between +// the function values +static double compute_score(int wiener_win, double *M, double *H, + InterpKernel vfilt, InterpKernel hfilt) { + double ab[WIENER_WIN * WIENER_WIN]; + int i, k, l; + double P = 0, Q = 0; + double iP = 0, iQ = 0; + double Score, iScore; + double a[WIENER_WIN], b[WIENER_WIN]; + const int plane_off = (WIENER_WIN - wiener_win) >> 1; + const int wiener_win2 = wiener_win * wiener_win; + + aom_clear_system_state(); + + a[WIENER_HALFWIN] = b[WIENER_HALFWIN] = 1.0; + for (i = 0; i < WIENER_HALFWIN; ++i) { + a[i] = a[WIENER_WIN - i - 1] = (double)vfilt[i] / WIENER_FILT_STEP; + b[i] = b[WIENER_WIN - i - 1] = (double)hfilt[i] / WIENER_FILT_STEP; + a[WIENER_HALFWIN] -= 2 * a[i]; + b[WIENER_HALFWIN] -= 2 * b[i]; + } + memset(ab, 0, sizeof(ab)); + for (k = 0; k < wiener_win; ++k) { + for (l = 0; l < wiener_win; ++l) + ab[k * wiener_win + l] = a[l + plane_off] * b[k + plane_off]; + } + for (k = 0; k < wiener_win2; ++k) { + P += ab[k] * M[k]; + for (l = 0; l < wiener_win2; ++l) + Q += ab[k] * H[k * wiener_win2 + l] * ab[l]; + } + Score = Q - 2 * P; + + iP = M[wiener_win2 >> 1]; + iQ = H[(wiener_win2 >> 1) * wiener_win2 + (wiener_win2 >> 1)]; + iScore = iQ - 2 * iP; + + return Score - iScore; +} + +static void quantize_sym_filter(int wiener_win, double *f, InterpKernel fi) { + int i; + const int wiener_halfwin = (wiener_win >> 1); + for (i = 0; i < wiener_halfwin; ++i) { + fi[i] = RINT(f[i] * WIENER_FILT_STEP); + } + // Specialize for 7-tap filter + if (wiener_win == WIENER_WIN) { + fi[0] = CLIP(fi[0], WIENER_FILT_TAP0_MINV, WIENER_FILT_TAP0_MAXV); + fi[1] = CLIP(fi[1], WIENER_FILT_TAP1_MINV, WIENER_FILT_TAP1_MAXV); + fi[2] = CLIP(fi[2], WIENER_FILT_TAP2_MINV, WIENER_FILT_TAP2_MAXV); + } else { + fi[2] = CLIP(fi[1], WIENER_FILT_TAP2_MINV, WIENER_FILT_TAP2_MAXV); + fi[1] = CLIP(fi[0], WIENER_FILT_TAP1_MINV, WIENER_FILT_TAP1_MAXV); + fi[0] = 0; + } + // Satisfy filter constraints + fi[WIENER_WIN - 1] = fi[0]; + fi[WIENER_WIN - 2] = fi[1]; + fi[WIENER_WIN - 3] = fi[2]; + // The central element has an implicit +WIENER_FILT_STEP + fi[3] = -2 * (fi[0] + fi[1] + fi[2]); +} + +static int count_wiener_bits(int wiener_win, WienerInfo *wiener_info, + WienerInfo *ref_wiener_info) { + int bits = 0; + if (wiener_win == WIENER_WIN) + bits += aom_count_primitive_refsubexpfin( + WIENER_FILT_TAP0_MAXV - WIENER_FILT_TAP0_MINV + 1, + WIENER_FILT_TAP0_SUBEXP_K, + ref_wiener_info->vfilter[0] - WIENER_FILT_TAP0_MINV, + wiener_info->vfilter[0] - WIENER_FILT_TAP0_MINV); + bits += aom_count_primitive_refsubexpfin( + WIENER_FILT_TAP1_MAXV - WIENER_FILT_TAP1_MINV + 1, + WIENER_FILT_TAP1_SUBEXP_K, + ref_wiener_info->vfilter[1] - WIENER_FILT_TAP1_MINV, + wiener_info->vfilter[1] - WIENER_FILT_TAP1_MINV); + bits += aom_count_primitive_refsubexpfin( + WIENER_FILT_TAP2_MAXV - WIENER_FILT_TAP2_MINV + 1, + WIENER_FILT_TAP2_SUBEXP_K, + ref_wiener_info->vfilter[2] - WIENER_FILT_TAP2_MINV, + wiener_info->vfilter[2] - WIENER_FILT_TAP2_MINV); + if (wiener_win == WIENER_WIN) + bits += aom_count_primitive_refsubexpfin( + WIENER_FILT_TAP0_MAXV - WIENER_FILT_TAP0_MINV + 1, + WIENER_FILT_TAP0_SUBEXP_K, + ref_wiener_info->hfilter[0] - WIENER_FILT_TAP0_MINV, + wiener_info->hfilter[0] - WIENER_FILT_TAP0_MINV); + bits += aom_count_primitive_refsubexpfin( + WIENER_FILT_TAP1_MAXV - WIENER_FILT_TAP1_MINV + 1, + WIENER_FILT_TAP1_SUBEXP_K, + ref_wiener_info->hfilter[1] - WIENER_FILT_TAP1_MINV, + wiener_info->hfilter[1] - WIENER_FILT_TAP1_MINV); + bits += aom_count_primitive_refsubexpfin( + WIENER_FILT_TAP2_MAXV - WIENER_FILT_TAP2_MINV + 1, + WIENER_FILT_TAP2_SUBEXP_K, + ref_wiener_info->hfilter[2] - WIENER_FILT_TAP2_MINV, + wiener_info->hfilter[2] - WIENER_FILT_TAP2_MINV); + return bits; +} + +#define USE_WIENER_REFINEMENT_SEARCH 1 +static int64_t finer_tile_search_wiener(const RestSearchCtxt *rsc, + const RestorationTileLimits *limits, + const AV1PixelRect *tile, + RestorationUnitInfo *rui, + int wiener_win) { + const int plane_off = (WIENER_WIN - wiener_win) >> 1; + int64_t err = try_restoration_unit(rsc, limits, tile, rui); +#if USE_WIENER_REFINEMENT_SEARCH + int64_t err2; + int tap_min[] = { WIENER_FILT_TAP0_MINV, WIENER_FILT_TAP1_MINV, + WIENER_FILT_TAP2_MINV }; + int tap_max[] = { WIENER_FILT_TAP0_MAXV, WIENER_FILT_TAP1_MAXV, + WIENER_FILT_TAP2_MAXV }; + + WienerInfo *plane_wiener = &rui->wiener_info; + + // printf("err pre = %"PRId64"\n", err); + const int start_step = 4; + for (int s = start_step; s >= 1; s >>= 1) { + for (int p = plane_off; p < WIENER_HALFWIN; ++p) { + int skip = 0; + do { + if (plane_wiener->hfilter[p] - s >= tap_min[p]) { + plane_wiener->hfilter[p] -= s; + plane_wiener->hfilter[WIENER_WIN - p - 1] -= s; + plane_wiener->hfilter[WIENER_HALFWIN] += 2 * s; + err2 = try_restoration_unit(rsc, limits, tile, rui); + if (err2 > err) { + plane_wiener->hfilter[p] += s; + plane_wiener->hfilter[WIENER_WIN - p - 1] += s; + plane_wiener->hfilter[WIENER_HALFWIN] -= 2 * s; + } else { + err = err2; + skip = 1; + // At the highest step size continue moving in the same direction + if (s == start_step) continue; + } + } + break; + } while (1); + if (skip) break; + do { + if (plane_wiener->hfilter[p] + s <= tap_max[p]) { + plane_wiener->hfilter[p] += s; + plane_wiener->hfilter[WIENER_WIN - p - 1] += s; + plane_wiener->hfilter[WIENER_HALFWIN] -= 2 * s; + err2 = try_restoration_unit(rsc, limits, tile, rui); + if (err2 > err) { + plane_wiener->hfilter[p] -= s; + plane_wiener->hfilter[WIENER_WIN - p - 1] -= s; + plane_wiener->hfilter[WIENER_HALFWIN] += 2 * s; + } else { + err = err2; + // At the highest step size continue moving in the same direction + if (s == start_step) continue; + } + } + break; + } while (1); + } + for (int p = plane_off; p < WIENER_HALFWIN; ++p) { + int skip = 0; + do { + if (plane_wiener->vfilter[p] - s >= tap_min[p]) { + plane_wiener->vfilter[p] -= s; + plane_wiener->vfilter[WIENER_WIN - p - 1] -= s; + plane_wiener->vfilter[WIENER_HALFWIN] += 2 * s; + err2 = try_restoration_unit(rsc, limits, tile, rui); + if (err2 > err) { + plane_wiener->vfilter[p] += s; + plane_wiener->vfilter[WIENER_WIN - p - 1] += s; + plane_wiener->vfilter[WIENER_HALFWIN] -= 2 * s; + } else { + err = err2; + skip = 1; + // At the highest step size continue moving in the same direction + if (s == start_step) continue; + } + } + break; + } while (1); + if (skip) break; + do { + if (plane_wiener->vfilter[p] + s <= tap_max[p]) { + plane_wiener->vfilter[p] += s; + plane_wiener->vfilter[WIENER_WIN - p - 1] += s; + plane_wiener->vfilter[WIENER_HALFWIN] -= 2 * s; + err2 = try_restoration_unit(rsc, limits, tile, rui); + if (err2 > err) { + plane_wiener->vfilter[p] -= s; + plane_wiener->vfilter[WIENER_WIN - p - 1] -= s; + plane_wiener->vfilter[WIENER_HALFWIN] += 2 * s; + } else { + err = err2; + // At the highest step size continue moving in the same direction + if (s == start_step) continue; + } + } + break; + } while (1); + } + } +// printf("err post = %"PRId64"\n", err); +#endif // USE_WIENER_REFINEMENT_SEARCH + return err; +} + +static void search_wiener(const RestorationTileLimits *limits, + const AV1PixelRect *tile_rect, int rest_unit_idx, + void *priv, int32_t *tmpbuf, + RestorationLineBuffers *rlbs) { + (void)tmpbuf; + (void)rlbs; + RestSearchCtxt *rsc = (RestSearchCtxt *)priv; + RestUnitSearchInfo *rusi = &rsc->rusi[rest_unit_idx]; + + const int wiener_win = + (rsc->plane == AOM_PLANE_Y) ? WIENER_WIN : WIENER_WIN_CHROMA; + + double M[WIENER_WIN2]; + double H[WIENER_WIN2 * WIENER_WIN2]; + double vfilterd[WIENER_WIN], hfilterd[WIENER_WIN]; + + const AV1_COMMON *const cm = rsc->cm; + if (cm->seq_params.use_highbitdepth) { + compute_stats_highbd(wiener_win, rsc->dgd_buffer, rsc->src_buffer, + limits->h_start, limits->h_end, limits->v_start, + limits->v_end, rsc->dgd_stride, rsc->src_stride, M, H); + } else { + av1_compute_stats(wiener_win, rsc->dgd_buffer, rsc->src_buffer, + limits->h_start, limits->h_end, limits->v_start, + limits->v_end, rsc->dgd_stride, rsc->src_stride, M, H); + } + + const MACROBLOCK *const x = rsc->x; + const int64_t bits_none = x->wiener_restore_cost[0]; + + if (!wiener_decompose_sep_sym(wiener_win, M, H, vfilterd, hfilterd)) { + rsc->bits += bits_none; + rsc->sse += rusi->sse[RESTORE_NONE]; + rusi->best_rtype[RESTORE_WIENER - 1] = RESTORE_NONE; + rusi->sse[RESTORE_WIENER] = INT64_MAX; + return; + } + + RestorationUnitInfo rui; + memset(&rui, 0, sizeof(rui)); + rui.restoration_type = RESTORE_WIENER; + quantize_sym_filter(wiener_win, vfilterd, rui.wiener_info.vfilter); + quantize_sym_filter(wiener_win, hfilterd, rui.wiener_info.hfilter); + + // Filter score computes the value of the function x'*A*x - x'*b for the + // learned filter and compares it against identity filer. If there is no + // reduction in the function, the filter is reverted back to identity + if (compute_score(wiener_win, M, H, rui.wiener_info.vfilter, + rui.wiener_info.hfilter) > 0) { + rsc->bits += bits_none; + rsc->sse += rusi->sse[RESTORE_NONE]; + rusi->best_rtype[RESTORE_WIENER - 1] = RESTORE_NONE; + rusi->sse[RESTORE_WIENER] = INT64_MAX; + return; + } + + aom_clear_system_state(); + + rusi->sse[RESTORE_WIENER] = + finer_tile_search_wiener(rsc, limits, tile_rect, &rui, wiener_win); + rusi->wiener = rui.wiener_info; + + if (wiener_win != WIENER_WIN) { + assert(rui.wiener_info.vfilter[0] == 0 && + rui.wiener_info.vfilter[WIENER_WIN - 1] == 0); + assert(rui.wiener_info.hfilter[0] == 0 && + rui.wiener_info.hfilter[WIENER_WIN - 1] == 0); + } + + const int64_t bits_wiener = + x->wiener_restore_cost[1] + + (count_wiener_bits(wiener_win, &rusi->wiener, &rsc->wiener) + << AV1_PROB_COST_SHIFT); + + double cost_none = + RDCOST_DBL(x->rdmult, bits_none >> 4, rusi->sse[RESTORE_NONE]); + double cost_wiener = + RDCOST_DBL(x->rdmult, bits_wiener >> 4, rusi->sse[RESTORE_WIENER]); + + RestorationType rtype = + (cost_wiener < cost_none) ? RESTORE_WIENER : RESTORE_NONE; + rusi->best_rtype[RESTORE_WIENER - 1] = rtype; + + rsc->sse += rusi->sse[rtype]; + rsc->bits += (cost_wiener < cost_none) ? bits_wiener : bits_none; + if (cost_wiener < cost_none) rsc->wiener = rusi->wiener; +} + +static void search_norestore(const RestorationTileLimits *limits, + const AV1PixelRect *tile_rect, int rest_unit_idx, + void *priv, int32_t *tmpbuf, + RestorationLineBuffers *rlbs) { + (void)tile_rect; + (void)tmpbuf; + (void)rlbs; + + RestSearchCtxt *rsc = (RestSearchCtxt *)priv; + RestUnitSearchInfo *rusi = &rsc->rusi[rest_unit_idx]; + + const int highbd = rsc->cm->seq_params.use_highbitdepth; + rusi->sse[RESTORE_NONE] = sse_restoration_unit( + limits, rsc->src, rsc->cm->frame_to_show, rsc->plane, highbd); + + rsc->sse += rusi->sse[RESTORE_NONE]; +} + +static void search_switchable(const RestorationTileLimits *limits, + const AV1PixelRect *tile_rect, int rest_unit_idx, + void *priv, int32_t *tmpbuf, + RestorationLineBuffers *rlbs) { + (void)limits; + (void)tile_rect; + (void)tmpbuf; + (void)rlbs; + RestSearchCtxt *rsc = (RestSearchCtxt *)priv; + RestUnitSearchInfo *rusi = &rsc->rusi[rest_unit_idx]; + + const MACROBLOCK *const x = rsc->x; + + const int wiener_win = + (rsc->plane == AOM_PLANE_Y) ? WIENER_WIN : WIENER_WIN_CHROMA; + + double best_cost = 0; + int64_t best_bits = 0; + RestorationType best_rtype = RESTORE_NONE; + + for (RestorationType r = 0; r < RESTORE_SWITCHABLE_TYPES; ++r) { + // Check for the condition that wiener or sgrproj search could not + // find a solution or the solution was worse than RESTORE_NONE. + // In either case the best_rtype will be set as RESTORE_NONE. These + // should be skipped from the test below. + if (r > RESTORE_NONE) { + if (rusi->best_rtype[r - 1] == RESTORE_NONE) continue; + } + + const int64_t sse = rusi->sse[r]; + int64_t coeff_pcost = 0; + switch (r) { + case RESTORE_NONE: coeff_pcost = 0; break; + case RESTORE_WIENER: + coeff_pcost = + count_wiener_bits(wiener_win, &rusi->wiener, &rsc->wiener); + break; + case RESTORE_SGRPROJ: + coeff_pcost = count_sgrproj_bits(&rusi->sgrproj, &rsc->sgrproj); + break; + default: assert(0); break; + } + const int64_t coeff_bits = coeff_pcost << AV1_PROB_COST_SHIFT; + const int64_t bits = x->switchable_restore_cost[r] + coeff_bits; + double cost = RDCOST_DBL(x->rdmult, bits >> 4, sse); + if (r == RESTORE_SGRPROJ && rusi->sgrproj.ep < 10) + cost *= (1 + DUAL_SGR_PENALTY_MULT * rsc->sf->dual_sgr_penalty_level); + if (r == 0 || cost < best_cost) { + best_cost = cost; + best_bits = bits; + best_rtype = r; + } + } + + rusi->best_rtype[RESTORE_SWITCHABLE - 1] = best_rtype; + + rsc->sse += rusi->sse[best_rtype]; + rsc->bits += best_bits; + if (best_rtype == RESTORE_WIENER) rsc->wiener = rusi->wiener; + if (best_rtype == RESTORE_SGRPROJ) rsc->sgrproj = rusi->sgrproj; +} + +static void copy_unit_info(RestorationType frame_rtype, + const RestUnitSearchInfo *rusi, + RestorationUnitInfo *rui) { + assert(frame_rtype > 0); + rui->restoration_type = rusi->best_rtype[frame_rtype - 1]; + if (rui->restoration_type == RESTORE_WIENER) + rui->wiener_info = rusi->wiener; + else + rui->sgrproj_info = rusi->sgrproj; +} + +static double search_rest_type(RestSearchCtxt *rsc, RestorationType rtype) { + static const rest_unit_visitor_t funs[RESTORE_TYPES] = { + search_norestore, search_wiener, search_sgrproj, search_switchable + }; + + reset_rsc(rsc); + rsc_on_tile(LR_TILE_ROW, LR_TILE_COL, rsc); + av1_foreach_rest_unit_in_plane(rsc->cm, rsc->plane, funs[rtype], rsc, + &rsc->tile_rect, rsc->cm->rst_tmpbuf, NULL); + return RDCOST_DBL(rsc->x->rdmult, rsc->bits >> 4, rsc->sse); +} + +static int rest_tiles_in_plane(const AV1_COMMON *cm, int plane) { + const RestorationInfo *rsi = &cm->rst_info[plane]; + return rsi->units_per_tile; +} + +void av1_pick_filter_restoration(const YV12_BUFFER_CONFIG *src, AV1_COMP *cpi) { + AV1_COMMON *const cm = &cpi->common; + const int num_planes = av1_num_planes(cm); + assert(!cm->all_lossless); + + int ntiles[2]; + for (int is_uv = 0; is_uv < 2; ++is_uv) + ntiles[is_uv] = rest_tiles_in_plane(cm, is_uv); + + assert(ntiles[1] <= ntiles[0]); + RestUnitSearchInfo *rusi = + (RestUnitSearchInfo *)aom_memalign(16, sizeof(*rusi) * ntiles[0]); + + // If the restoration unit dimensions are not multiples of + // rsi->restoration_unit_size then some elements of the rusi array may be + // left uninitialised when we reach copy_unit_info(...). This is not a + // problem, as these elements are ignored later, but in order to quiet + // Valgrind's warnings we initialise the array below. + memset(rusi, 0, sizeof(*rusi) * ntiles[0]); + cpi->td.mb.rdmult = cpi->rd.RDMULT; + + RestSearchCtxt rsc; + const int plane_start = AOM_PLANE_Y; + const int plane_end = num_planes > 1 ? AOM_PLANE_V : AOM_PLANE_Y; + for (int plane = plane_start; plane <= plane_end; ++plane) { + init_rsc(src, &cpi->common, &cpi->td.mb, &cpi->sf, plane, rusi, + &cpi->trial_frame_rst, &rsc); + + const int plane_ntiles = ntiles[plane > 0]; + const RestorationType num_rtypes = + (plane_ntiles > 1) ? RESTORE_TYPES : RESTORE_SWITCHABLE_TYPES; + + double best_cost = 0; + RestorationType best_rtype = RESTORE_NONE; + + const int highbd = rsc.cm->seq_params.use_highbitdepth; + extend_frame(rsc.dgd_buffer, rsc.plane_width, rsc.plane_height, + rsc.dgd_stride, RESTORATION_BORDER, RESTORATION_BORDER, + highbd); + + for (RestorationType r = 0; r < num_rtypes; ++r) { + if ((force_restore_type != RESTORE_TYPES) && (r != RESTORE_NONE) && + (r != force_restore_type)) + continue; + + double cost = search_rest_type(&rsc, r); + + if (r == 0 || cost < best_cost) { + best_cost = cost; + best_rtype = r; + } + } + + cm->rst_info[plane].frame_restoration_type = best_rtype; + if (force_restore_type != RESTORE_TYPES) + assert(best_rtype == force_restore_type || best_rtype == RESTORE_NONE); + + if (best_rtype != RESTORE_NONE) { + for (int u = 0; u < plane_ntiles; ++u) { + copy_unit_info(best_rtype, &rusi[u], &cm->rst_info[plane].unit_info[u]); + } + } + } + + aom_free(rusi); +} |