| /* |
| * 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 <math.h> |
| |
| #include "config/aom_config.h" |
| #include "config/aom_dsp_rtcd.h" |
| #include "config/aom_scale_rtcd.h" |
| |
| #include "aom_mem/aom_mem.h" |
| #include "av1/common/av1_common_int.h" |
| #include "av1/common/resize.h" |
| #include "av1/common/restoration.h" |
| #include "aom_dsp/aom_dsp_common.h" |
| #include "aom_mem/aom_mem.h" |
| |
| #include "aom_ports/mem.h" |
| |
| // The 's' values are calculated based on original 'r' and 'e' values in the |
| // spec using GenSgrprojVtable(). |
| // Note: Setting r = 0 skips the filter; with corresponding s = -1 (invalid). |
| const sgr_params_type av1_sgr_params[SGRPROJ_PARAMS] = { |
| { { 2, 1 }, { 140, 3236 } }, { { 2, 1 }, { 112, 2158 } }, |
| { { 2, 1 }, { 93, 1618 } }, { { 2, 1 }, { 80, 1438 } }, |
| { { 2, 1 }, { 70, 1295 } }, { { 2, 1 }, { 58, 1177 } }, |
| { { 2, 1 }, { 47, 1079 } }, { { 2, 1 }, { 37, 996 } }, |
| { { 2, 1 }, { 30, 925 } }, { { 2, 1 }, { 25, 863 } }, |
| { { 0, 1 }, { -1, 2589 } }, { { 0, 1 }, { -1, 1618 } }, |
| { { 0, 1 }, { -1, 1177 } }, { { 0, 1 }, { -1, 925 } }, |
| { { 2, 0 }, { 56, -1 } }, { { 2, 0 }, { 22, -1 } }, |
| }; |
| |
| AV1PixelRect av1_whole_frame_rect(const AV1_COMMON *cm, int is_uv) { |
| AV1PixelRect rect; |
| |
| int ss_x = is_uv && cm->seq_params->subsampling_x; |
| int ss_y = is_uv && cm->seq_params->subsampling_y; |
| |
| rect.top = 0; |
| rect.bottom = ROUND_POWER_OF_TWO(cm->height, ss_y); |
| rect.left = 0; |
| rect.right = ROUND_POWER_OF_TWO(cm->superres_upscaled_width, ss_x); |
| return rect; |
| } |
| |
| // Count horizontal or vertical units per tile (use a width or height for |
| // tile_size, respectively). We basically want to divide the tile size by the |
| // size of a restoration unit. Rather than rounding up unconditionally as you |
| // might expect, we round to nearest, which models the way a right or bottom |
| // restoration unit can extend to up to 150% its normal width or height. The |
| // max with 1 is to deal with tiles that are smaller than half of a restoration |
| // unit. |
| int av1_lr_count_units_in_tile(int unit_size, int tile_size) { |
| return AOMMAX((tile_size + (unit_size >> 1)) / unit_size, 1); |
| } |
| |
| void av1_alloc_restoration_struct(AV1_COMMON *cm, RestorationInfo *rsi, |
| int is_uv) { |
| // We need to allocate enough space for restoration units to cover the |
| // largest tile. Without CONFIG_MAX_TILE, this is always the tile at the |
| // top-left and we can use av1_get_tile_rect(). With CONFIG_MAX_TILE, we have |
| // to do the computation ourselves, iterating over the tiles and keeping |
| // track of the largest width and height, then upscaling. |
| const AV1PixelRect tile_rect = av1_whole_frame_rect(cm, is_uv); |
| const int max_tile_w = tile_rect.right - tile_rect.left; |
| const int max_tile_h = tile_rect.bottom - tile_rect.top; |
| |
| // To calculate hpertile and vpertile (horizontal and vertical units per |
| // tile), we basically want to divide the largest tile width or height by the |
| // size of a restoration unit. Rather than rounding up unconditionally as you |
| // might expect, we round to nearest, which models the way a right or bottom |
| // restoration unit can extend to up to 150% its normal width or height. The |
| // max with 1 is to deal with tiles that are smaller than half of a |
| // restoration unit. |
| const int unit_size = rsi->restoration_unit_size; |
| const int hpertile = av1_lr_count_units_in_tile(unit_size, max_tile_w); |
| const int vpertile = av1_lr_count_units_in_tile(unit_size, max_tile_h); |
| |
| rsi->units_per_tile = hpertile * vpertile; |
| rsi->horz_units_per_tile = hpertile; |
| rsi->vert_units_per_tile = vpertile; |
| |
| const int ntiles = 1; |
| const int nunits = ntiles * rsi->units_per_tile; |
| |
| aom_free(rsi->unit_info); |
| CHECK_MEM_ERROR(cm, rsi->unit_info, |
| (RestorationUnitInfo *)aom_memalign( |
| 16, sizeof(*rsi->unit_info) * nunits)); |
| } |
| |
| void av1_free_restoration_struct(RestorationInfo *rst_info) { |
| aom_free(rst_info->unit_info); |
| rst_info->unit_info = NULL; |
| } |
| |
| #if 0 |
| // Pair of values for each sgrproj parameter: |
| // Index 0 corresponds to r[0], e[0] |
| // Index 1 corresponds to r[1], e[1] |
| int sgrproj_mtable[SGRPROJ_PARAMS][2]; |
| |
| static void GenSgrprojVtable() { |
| for (int i = 0; i < SGRPROJ_PARAMS; ++i) { |
| const sgr_params_type *const params = &av1_sgr_params[i]; |
| for (int j = 0; j < 2; ++j) { |
| const int e = params->e[j]; |
| const int r = params->r[j]; |
| if (r == 0) { // filter is disabled |
| sgrproj_mtable[i][j] = -1; // mark invalid |
| } else { // filter is enabled |
| const int n = (2 * r + 1) * (2 * r + 1); |
| const int n2e = n * n * e; |
| assert(n2e != 0); |
| sgrproj_mtable[i][j] = (((1 << SGRPROJ_MTABLE_BITS) + n2e / 2) / n2e); |
| } |
| } |
| } |
| } |
| #endif |
| |
| void av1_loop_restoration_precal() { |
| #if 0 |
| GenSgrprojVtable(); |
| #endif |
| } |
| |
| static void extend_frame_lowbd(uint8_t *data, int width, int height, int stride, |
| int border_horz, int border_vert) { |
| uint8_t *data_p; |
| int i; |
| for (i = 0; i < height; ++i) { |
| data_p = data + i * stride; |
| memset(data_p - border_horz, data_p[0], border_horz); |
| memset(data_p + width, data_p[width - 1], border_horz); |
| } |
| data_p = data - border_horz; |
| for (i = -border_vert; i < 0; ++i) { |
| memcpy(data_p + i * stride, data_p, width + 2 * border_horz); |
| } |
| for (i = height; i < height + border_vert; ++i) { |
| memcpy(data_p + i * stride, data_p + (height - 1) * stride, |
| width + 2 * border_horz); |
| } |
| } |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| static void extend_frame_highbd(uint16_t *data, int width, int height, |
| int stride, int border_horz, int border_vert) { |
| uint16_t *data_p; |
| int i, j; |
| for (i = 0; i < height; ++i) { |
| data_p = data + i * stride; |
| for (j = -border_horz; j < 0; ++j) data_p[j] = data_p[0]; |
| for (j = width; j < width + border_horz; ++j) data_p[j] = data_p[width - 1]; |
| } |
| data_p = data - border_horz; |
| for (i = -border_vert; i < 0; ++i) { |
| memcpy(data_p + i * stride, data_p, |
| (width + 2 * border_horz) * sizeof(uint16_t)); |
| } |
| for (i = height; i < height + border_vert; ++i) { |
| memcpy(data_p + i * stride, data_p + (height - 1) * stride, |
| (width + 2 * border_horz) * sizeof(uint16_t)); |
| } |
| } |
| |
| static void copy_tile_highbd(int width, int height, const uint16_t *src, |
| int src_stride, uint16_t *dst, int dst_stride) { |
| for (int i = 0; i < height; ++i) |
| memcpy(dst + i * dst_stride, src + i * src_stride, width * sizeof(*dst)); |
| } |
| #endif |
| |
| void av1_extend_frame(uint8_t *data, int width, int height, int stride, |
| int border_horz, int border_vert, int highbd) { |
| #if CONFIG_AV1_HIGHBITDEPTH |
| if (highbd) { |
| extend_frame_highbd(CONVERT_TO_SHORTPTR(data), width, height, stride, |
| border_horz, border_vert); |
| return; |
| } |
| #endif |
| (void)highbd; |
| extend_frame_lowbd(data, width, height, stride, border_horz, border_vert); |
| } |
| |
| static void copy_tile_lowbd(int width, int height, const uint8_t *src, |
| int src_stride, uint8_t *dst, int dst_stride) { |
| for (int i = 0; i < height; ++i) |
| memcpy(dst + i * dst_stride, src + i * src_stride, width); |
| } |
| |
| static void copy_tile(int width, int height, const uint8_t *src, int src_stride, |
| uint8_t *dst, int dst_stride, int highbd) { |
| #if CONFIG_AV1_HIGHBITDEPTH |
| if (highbd) { |
| copy_tile_highbd(width, height, CONVERT_TO_SHORTPTR(src), src_stride, |
| CONVERT_TO_SHORTPTR(dst), dst_stride); |
| return; |
| } |
| #endif |
| (void)highbd; |
| copy_tile_lowbd(width, height, src, src_stride, dst, dst_stride); |
| } |
| |
| #define REAL_PTR(hbd, d) ((hbd) ? (uint8_t *)CONVERT_TO_SHORTPTR(d) : (d)) |
| |
| // With striped loop restoration, the filtering for each 64-pixel stripe gets |
| // most of its input from the output of CDEF (stored in data8), but we need to |
| // fill out a border of 3 pixels above/below the stripe according to the |
| // following |
| // rules: |
| // |
| // * At a frame boundary, we copy the outermost row of CDEF pixels three times. |
| // This extension is done by a call to av1_extend_frame() at the start of the |
| // loop restoration process, so the value of copy_above/copy_below doesn't |
| // strictly matter. However, by setting *copy_above = *copy_below = 1 whenever |
| // loop filtering across tiles is disabled, we can allow |
| // {setup,restore}_processing_stripe_boundary to assume that the top/bottom |
| // data has always been copied, simplifying the behaviour at the left and |
| // right edges of tiles. |
| // |
| // * If we're at a tile boundary and loop filtering across tiles is enabled, |
| // then there is a logical stripe which is 64 pixels high, but which is split |
| // into an 8px high and a 56px high stripe so that the processing (and |
| // coefficient set usage) can be aligned to tiles. |
| // In this case, we use the 3 rows of CDEF output across the boundary for |
| // context; this corresponds to leaving the frame buffer as-is. |
| // |
| // * If we're at a tile boundary and loop filtering across tiles is disabled, |
| // then we take the outermost row of CDEF pixels *within the current tile* |
| // and copy it three times. Thus we behave exactly as if the tile were a full |
| // frame. |
| // |
| // * Otherwise, we're at a stripe boundary within a tile. In that case, we |
| // take 2 rows of deblocked pixels and extend them to 3 rows of context. |
| // |
| // The distinction between the latter two cases is handled by the |
| // av1_loop_restoration_save_boundary_lines() function, so here we just need |
| // to decide if we're overwriting the above/below boundary pixels or not. |
| static void get_stripe_boundary_info(const RestorationTileLimits *limits, |
| const AV1PixelRect *tile_rect, int ss_y, |
| int *copy_above, int *copy_below) { |
| *copy_above = 1; |
| *copy_below = 1; |
| |
| const int full_stripe_height = RESTORATION_PROC_UNIT_SIZE >> ss_y; |
| const int runit_offset = RESTORATION_UNIT_OFFSET >> ss_y; |
| |
| const int first_stripe_in_tile = (limits->v_start == tile_rect->top); |
| const int this_stripe_height = |
| full_stripe_height - (first_stripe_in_tile ? runit_offset : 0); |
| const int last_stripe_in_tile = |
| (limits->v_start + this_stripe_height >= tile_rect->bottom); |
| |
| if (first_stripe_in_tile) *copy_above = 0; |
| if (last_stripe_in_tile) *copy_below = 0; |
| } |
| |
| // Overwrite the border pixels around a processing stripe so that the conditions |
| // listed above get_stripe_boundary_info() are preserved. |
| // We save the pixels which get overwritten into a temporary buffer, so that |
| // they can be restored by restore_processing_stripe_boundary() after we've |
| // processed the stripe. |
| // |
| // limits gives the rectangular limits of the remaining stripes for the current |
| // restoration unit. rsb is the stored stripe boundaries (taken from either |
| // deblock or CDEF output as necessary). |
| // |
| // tile_rect is the limits of the current tile and tile_stripe0 is the index of |
| // the first stripe in this tile (needed to convert the tile-relative stripe |
| // index we get from limits into something we can look up in rsb). |
| static void setup_processing_stripe_boundary( |
| const RestorationTileLimits *limits, const RestorationStripeBoundaries *rsb, |
| int rsb_row, int use_highbd, int h, uint8_t *data8, int data_stride, |
| RestorationLineBuffers *rlbs, int copy_above, int copy_below, int opt) { |
| // Offsets within the line buffers. The buffer logically starts at column |
| // -RESTORATION_EXTRA_HORZ so the 1st column (at x0 - RESTORATION_EXTRA_HORZ) |
| // has column x0 in the buffer. |
| const int buf_stride = rsb->stripe_boundary_stride; |
| const int buf_x0_off = limits->h_start; |
| const int line_width = |
| (limits->h_end - limits->h_start) + 2 * RESTORATION_EXTRA_HORZ; |
| const int line_size = line_width << use_highbd; |
| |
| const int data_x0 = limits->h_start - RESTORATION_EXTRA_HORZ; |
| |
| // Replace RESTORATION_BORDER pixels above the top of the stripe |
| // We expand RESTORATION_CTX_VERT=2 lines from rsb->stripe_boundary_above |
| // to fill RESTORATION_BORDER=3 lines of above pixels. This is done by |
| // duplicating the topmost of the 2 lines (see the AOMMAX call when |
| // calculating src_row, which gets the values 0, 0, 1 for i = -3, -2, -1). |
| // |
| // Special case: If we're at the top of a tile, which isn't on the topmost |
| // tile row, and we're allowed to loop filter across tiles, then we have a |
| // logical 64-pixel-high stripe which has been split into an 8-pixel high |
| // stripe and a 56-pixel high stripe (the current one). So, in this case, |
| // we want to leave the boundary alone! |
| if (!opt) { |
| if (copy_above) { |
| uint8_t *data8_tl = data8 + data_x0 + limits->v_start * data_stride; |
| |
| for (int i = -RESTORATION_BORDER; i < 0; ++i) { |
| const int buf_row = rsb_row + AOMMAX(i + RESTORATION_CTX_VERT, 0); |
| const int buf_off = buf_x0_off + buf_row * buf_stride; |
| const uint8_t *buf = |
| rsb->stripe_boundary_above + (buf_off << use_highbd); |
| uint8_t *dst8 = data8_tl + i * data_stride; |
| // Save old pixels, then replace with data from stripe_boundary_above |
| memcpy(rlbs->tmp_save_above[i + RESTORATION_BORDER], |
| REAL_PTR(use_highbd, dst8), line_size); |
| memcpy(REAL_PTR(use_highbd, dst8), buf, line_size); |
| } |
| } |
| |
| // Replace RESTORATION_BORDER pixels below the bottom of the stripe. |
| // The second buffer row is repeated, so src_row gets the values 0, 1, 1 |
| // for i = 0, 1, 2. |
| if (copy_below) { |
| const int stripe_end = limits->v_start + h; |
| uint8_t *data8_bl = data8 + data_x0 + stripe_end * data_stride; |
| |
| for (int i = 0; i < RESTORATION_BORDER; ++i) { |
| const int buf_row = rsb_row + AOMMIN(i, RESTORATION_CTX_VERT - 1); |
| const int buf_off = buf_x0_off + buf_row * buf_stride; |
| const uint8_t *src = |
| rsb->stripe_boundary_below + (buf_off << use_highbd); |
| |
| uint8_t *dst8 = data8_bl + i * data_stride; |
| // Save old pixels, then replace with data from stripe_boundary_below |
| memcpy(rlbs->tmp_save_below[i], REAL_PTR(use_highbd, dst8), line_size); |
| memcpy(REAL_PTR(use_highbd, dst8), src, line_size); |
| } |
| } |
| } else { |
| if (copy_above) { |
| uint8_t *data8_tl = data8 + data_x0 + limits->v_start * data_stride; |
| |
| // Only save and overwrite i=-RESTORATION_BORDER line. |
| uint8_t *dst8 = data8_tl + (-RESTORATION_BORDER) * data_stride; |
| // Save old pixels, then replace with data from stripe_boundary_above |
| memcpy(rlbs->tmp_save_above[0], REAL_PTR(use_highbd, dst8), line_size); |
| memcpy(REAL_PTR(use_highbd, dst8), |
| REAL_PTR(use_highbd, |
| data8_tl + (-RESTORATION_BORDER + 1) * data_stride), |
| line_size); |
| } |
| |
| if (copy_below) { |
| const int stripe_end = limits->v_start + h; |
| uint8_t *data8_bl = data8 + data_x0 + stripe_end * data_stride; |
| |
| // Only save and overwrite i=2 line. |
| uint8_t *dst8 = data8_bl + 2 * data_stride; |
| // Save old pixels, then replace with data from stripe_boundary_below |
| memcpy(rlbs->tmp_save_below[2], REAL_PTR(use_highbd, dst8), line_size); |
| memcpy(REAL_PTR(use_highbd, dst8), |
| REAL_PTR(use_highbd, data8_bl + (2 - 1) * data_stride), line_size); |
| } |
| } |
| } |
| |
| // This function restores the boundary lines modified by |
| // setup_processing_stripe_boundary. |
| // |
| // Note: We need to be careful when handling the corners of the processing |
| // unit, because (eg.) the top-left corner is considered to be part of |
| // both the left and top borders. This means that, depending on the |
| // loop_filter_across_tiles_enabled flag, the corner pixels might get |
| // overwritten twice, once as part of the "top" border and once as part |
| // of the "left" border (or similar for other corners). |
| // |
| // Everything works out fine as long as we make sure to reverse the order |
| // when restoring, ie. we need to restore the left/right borders followed |
| // by the top/bottom borders. |
| static void restore_processing_stripe_boundary( |
| const RestorationTileLimits *limits, const RestorationLineBuffers *rlbs, |
| int use_highbd, int h, uint8_t *data8, int data_stride, int copy_above, |
| int copy_below, int opt) { |
| const int line_width = |
| (limits->h_end - limits->h_start) + 2 * RESTORATION_EXTRA_HORZ; |
| const int line_size = line_width << use_highbd; |
| |
| const int data_x0 = limits->h_start - RESTORATION_EXTRA_HORZ; |
| |
| if (!opt) { |
| if (copy_above) { |
| uint8_t *data8_tl = data8 + data_x0 + limits->v_start * data_stride; |
| for (int i = -RESTORATION_BORDER; i < 0; ++i) { |
| uint8_t *dst8 = data8_tl + i * data_stride; |
| memcpy(REAL_PTR(use_highbd, dst8), |
| rlbs->tmp_save_above[i + RESTORATION_BORDER], line_size); |
| } |
| } |
| |
| if (copy_below) { |
| const int stripe_bottom = limits->v_start + h; |
| uint8_t *data8_bl = data8 + data_x0 + stripe_bottom * data_stride; |
| |
| for (int i = 0; i < RESTORATION_BORDER; ++i) { |
| if (stripe_bottom + i >= limits->v_end + RESTORATION_BORDER) break; |
| |
| uint8_t *dst8 = data8_bl + i * data_stride; |
| memcpy(REAL_PTR(use_highbd, dst8), rlbs->tmp_save_below[i], line_size); |
| } |
| } |
| } else { |
| if (copy_above) { |
| uint8_t *data8_tl = data8 + data_x0 + limits->v_start * data_stride; |
| |
| // Only restore i=-RESTORATION_BORDER line. |
| uint8_t *dst8 = data8_tl + (-RESTORATION_BORDER) * data_stride; |
| memcpy(REAL_PTR(use_highbd, dst8), rlbs->tmp_save_above[0], line_size); |
| } |
| |
| if (copy_below) { |
| const int stripe_bottom = limits->v_start + h; |
| uint8_t *data8_bl = data8 + data_x0 + stripe_bottom * data_stride; |
| |
| // Only restore i=2 line. |
| if (stripe_bottom + 2 < limits->v_end + RESTORATION_BORDER) { |
| uint8_t *dst8 = data8_bl + 2 * data_stride; |
| memcpy(REAL_PTR(use_highbd, dst8), rlbs->tmp_save_below[2], line_size); |
| } |
| } |
| } |
| } |
| |
| static void wiener_filter_stripe(const RestorationUnitInfo *rui, |
| int stripe_width, int stripe_height, |
| int procunit_width, const uint8_t *src, |
| int src_stride, uint8_t *dst, int dst_stride, |
| int32_t *tmpbuf, int bit_depth) { |
| (void)tmpbuf; |
| (void)bit_depth; |
| assert(bit_depth == 8); |
| const ConvolveParams conv_params = get_conv_params_wiener(8); |
| |
| for (int j = 0; j < stripe_width; j += procunit_width) { |
| int w = AOMMIN(procunit_width, (stripe_width - j + 15) & ~15); |
| const uint8_t *src_p = src + j; |
| uint8_t *dst_p = dst + j; |
| av1_wiener_convolve_add_src( |
| src_p, src_stride, dst_p, dst_stride, rui->wiener_info.hfilter, 16, |
| rui->wiener_info.vfilter, 16, w, stripe_height, &conv_params); |
| } |
| } |
| |
| /* Calculate windowed sums (if sqr=0) or sums of squares (if sqr=1) |
| over the input. The window is of size (2r + 1)x(2r + 1), and we |
| specialize to r = 1, 2, 3. A default function is used for r > 3. |
| |
| Each loop follows the same format: We keep a window's worth of input |
| in individual variables and select data out of that as appropriate. |
| */ |
| static void boxsum1(int32_t *src, int width, int height, int src_stride, |
| int sqr, int32_t *dst, int dst_stride) { |
| int i, j, a, b, c; |
| assert(width > 2 * SGRPROJ_BORDER_HORZ); |
| assert(height > 2 * SGRPROJ_BORDER_VERT); |
| |
| // Vertical sum over 3-pixel regions, from src into dst. |
| if (!sqr) { |
| for (j = 0; j < width; ++j) { |
| a = src[j]; |
| b = src[src_stride + j]; |
| c = src[2 * src_stride + j]; |
| |
| dst[j] = a + b; |
| for (i = 1; i < height - 2; ++i) { |
| // Loop invariant: At the start of each iteration, |
| // a = src[(i - 1) * src_stride + j] |
| // b = src[(i ) * src_stride + j] |
| // c = src[(i + 1) * src_stride + j] |
| dst[i * dst_stride + j] = a + b + c; |
| a = b; |
| b = c; |
| c = src[(i + 2) * src_stride + j]; |
| } |
| dst[i * dst_stride + j] = a + b + c; |
| dst[(i + 1) * dst_stride + j] = b + c; |
| } |
| } else { |
| for (j = 0; j < width; ++j) { |
| a = src[j] * src[j]; |
| b = src[src_stride + j] * src[src_stride + j]; |
| c = src[2 * src_stride + j] * src[2 * src_stride + j]; |
| |
| dst[j] = a + b; |
| for (i = 1; i < height - 2; ++i) { |
| dst[i * dst_stride + j] = a + b + c; |
| a = b; |
| b = c; |
| c = src[(i + 2) * src_stride + j] * src[(i + 2) * src_stride + j]; |
| } |
| dst[i * dst_stride + j] = a + b + c; |
| dst[(i + 1) * dst_stride + j] = b + c; |
| } |
| } |
| |
| // Horizontal sum over 3-pixel regions of dst |
| for (i = 0; i < height; ++i) { |
| a = dst[i * dst_stride]; |
| b = dst[i * dst_stride + 1]; |
| c = dst[i * dst_stride + 2]; |
| |
| dst[i * dst_stride] = a + b; |
| for (j = 1; j < width - 2; ++j) { |
| // Loop invariant: At the start of each iteration, |
| // a = src[i * src_stride + (j - 1)] |
| // b = src[i * src_stride + (j )] |
| // c = src[i * src_stride + (j + 1)] |
| dst[i * dst_stride + j] = a + b + c; |
| a = b; |
| b = c; |
| c = dst[i * dst_stride + (j + 2)]; |
| } |
| dst[i * dst_stride + j] = a + b + c; |
| dst[i * dst_stride + (j + 1)] = b + c; |
| } |
| } |
| |
| static void boxsum2(int32_t *src, int width, int height, int src_stride, |
| int sqr, int32_t *dst, int dst_stride) { |
| int i, j, a, b, c, d, e; |
| assert(width > 2 * SGRPROJ_BORDER_HORZ); |
| assert(height > 2 * SGRPROJ_BORDER_VERT); |
| |
| // Vertical sum over 5-pixel regions, from src into dst. |
| if (!sqr) { |
| for (j = 0; j < width; ++j) { |
| a = src[j]; |
| b = src[src_stride + j]; |
| c = src[2 * src_stride + j]; |
| d = src[3 * src_stride + j]; |
| e = src[4 * src_stride + j]; |
| |
| dst[j] = a + b + c; |
| dst[dst_stride + j] = a + b + c + d; |
| for (i = 2; i < height - 3; ++i) { |
| // Loop invariant: At the start of each iteration, |
| // a = src[(i - 2) * src_stride + j] |
| // b = src[(i - 1) * src_stride + j] |
| // c = src[(i ) * src_stride + j] |
| // d = src[(i + 1) * src_stride + j] |
| // e = src[(i + 2) * src_stride + j] |
| dst[i * dst_stride + j] = a + b + c + d + e; |
| a = b; |
| b = c; |
| c = d; |
| d = e; |
| e = src[(i + 3) * src_stride + j]; |
| } |
| dst[i * dst_stride + j] = a + b + c + d + e; |
| dst[(i + 1) * dst_stride + j] = b + c + d + e; |
| dst[(i + 2) * dst_stride + j] = c + d + e; |
| } |
| } else { |
| for (j = 0; j < width; ++j) { |
| a = src[j] * src[j]; |
| b = src[src_stride + j] * src[src_stride + j]; |
| c = src[2 * src_stride + j] * src[2 * src_stride + j]; |
| d = src[3 * src_stride + j] * src[3 * src_stride + j]; |
| e = src[4 * src_stride + j] * src[4 * src_stride + j]; |
| |
| dst[j] = a + b + c; |
| dst[dst_stride + j] = a + b + c + d; |
| for (i = 2; i < height - 3; ++i) { |
| dst[i * dst_stride + j] = a + b + c + d + e; |
| a = b; |
| b = c; |
| c = d; |
| d = e; |
| e = src[(i + 3) * src_stride + j] * src[(i + 3) * src_stride + j]; |
| } |
| dst[i * dst_stride + j] = a + b + c + d + e; |
| dst[(i + 1) * dst_stride + j] = b + c + d + e; |
| dst[(i + 2) * dst_stride + j] = c + d + e; |
| } |
| } |
| |
| // Horizontal sum over 5-pixel regions of dst |
| for (i = 0; i < height; ++i) { |
| a = dst[i * dst_stride]; |
| b = dst[i * dst_stride + 1]; |
| c = dst[i * dst_stride + 2]; |
| d = dst[i * dst_stride + 3]; |
| e = dst[i * dst_stride + 4]; |
| |
| dst[i * dst_stride] = a + b + c; |
| dst[i * dst_stride + 1] = a + b + c + d; |
| for (j = 2; j < width - 3; ++j) { |
| // Loop invariant: At the start of each iteration, |
| // a = src[i * src_stride + (j - 2)] |
| // b = src[i * src_stride + (j - 1)] |
| // c = src[i * src_stride + (j )] |
| // d = src[i * src_stride + (j + 1)] |
| // e = src[i * src_stride + (j + 2)] |
| dst[i * dst_stride + j] = a + b + c + d + e; |
| a = b; |
| b = c; |
| c = d; |
| d = e; |
| e = dst[i * dst_stride + (j + 3)]; |
| } |
| dst[i * dst_stride + j] = a + b + c + d + e; |
| dst[i * dst_stride + (j + 1)] = b + c + d + e; |
| dst[i * dst_stride + (j + 2)] = c + d + e; |
| } |
| } |
| |
| static void boxsum(int32_t *src, int width, int height, int src_stride, int r, |
| int sqr, int32_t *dst, int dst_stride) { |
| if (r == 1) |
| boxsum1(src, width, height, src_stride, sqr, dst, dst_stride); |
| else if (r == 2) |
| boxsum2(src, width, height, src_stride, sqr, dst, dst_stride); |
| else |
| assert(0 && "Invalid value of r in self-guided filter"); |
| } |
| |
| void av1_decode_xq(const int *xqd, int *xq, const sgr_params_type *params) { |
| if (params->r[0] == 0) { |
| xq[0] = 0; |
| xq[1] = (1 << SGRPROJ_PRJ_BITS) - xqd[1]; |
| } else if (params->r[1] == 0) { |
| xq[0] = xqd[0]; |
| xq[1] = 0; |
| } else { |
| xq[0] = xqd[0]; |
| xq[1] = (1 << SGRPROJ_PRJ_BITS) - xq[0] - xqd[1]; |
| } |
| } |
| |
| const int32_t av1_x_by_xplus1[256] = { |
| // Special case: Map 0 -> 1 (corresponding to a value of 1/256) |
| // instead of 0. See comments in selfguided_restoration_internal() for why |
| 1, 128, 171, 192, 205, 213, 219, 224, 228, 230, 233, 235, 236, 238, 239, |
| 240, 241, 242, 243, 243, 244, 244, 245, 245, 246, 246, 247, 247, 247, 247, |
| 248, 248, 248, 248, 249, 249, 249, 249, 249, 250, 250, 250, 250, 250, 250, |
| 250, 251, 251, 251, 251, 251, 251, 251, 251, 251, 251, 252, 252, 252, 252, |
| 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 252, 253, 253, |
| 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, |
| 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 253, 254, 254, 254, |
| 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, |
| 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, |
| 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, |
| 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, 254, |
| 254, 254, 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
| 256, |
| }; |
| |
| const int32_t av1_one_by_x[MAX_NELEM] = { |
| 4096, 2048, 1365, 1024, 819, 683, 585, 512, 455, 410, 372, 341, 315, |
| 293, 273, 256, 241, 228, 216, 205, 195, 186, 178, 171, 164, |
| }; |
| |
| static void calculate_intermediate_result(int32_t *dgd, int width, int height, |
| int dgd_stride, int bit_depth, |
| int sgr_params_idx, int radius_idx, |
| int pass, int32_t *A, int32_t *B) { |
| const sgr_params_type *const params = &av1_sgr_params[sgr_params_idx]; |
| const int r = params->r[radius_idx]; |
| const int width_ext = width + 2 * SGRPROJ_BORDER_HORZ; |
| const int height_ext = height + 2 * SGRPROJ_BORDER_VERT; |
| // Adjusting the stride of A and B here appears to avoid bad cache effects, |
| // leading to a significant speed improvement. |
| // We also align the stride to a multiple of 16 bytes, for consistency |
| // with the SIMD version of this function. |
| int buf_stride = ((width_ext + 3) & ~3) + 16; |
| const int step = pass == 0 ? 1 : 2; |
| int i, j; |
| |
| assert(r <= MAX_RADIUS && "Need MAX_RADIUS >= r"); |
| assert(r <= SGRPROJ_BORDER_VERT - 1 && r <= SGRPROJ_BORDER_HORZ - 1 && |
| "Need SGRPROJ_BORDER_* >= r+1"); |
| |
| boxsum(dgd - dgd_stride * SGRPROJ_BORDER_VERT - SGRPROJ_BORDER_HORZ, |
| width_ext, height_ext, dgd_stride, r, 0, B, buf_stride); |
| boxsum(dgd - dgd_stride * SGRPROJ_BORDER_VERT - SGRPROJ_BORDER_HORZ, |
| width_ext, height_ext, dgd_stride, r, 1, A, buf_stride); |
| A += SGRPROJ_BORDER_VERT * buf_stride + SGRPROJ_BORDER_HORZ; |
| B += SGRPROJ_BORDER_VERT * buf_stride + SGRPROJ_BORDER_HORZ; |
| // Calculate the eventual A[] and B[] arrays. Include a 1-pixel border - ie, |
| // for a 64x64 processing unit, we calculate 66x66 pixels of A[] and B[]. |
| for (i = -1; i < height + 1; i += step) { |
| for (j = -1; j < width + 1; ++j) { |
| const int k = i * buf_stride + j; |
| const int n = (2 * r + 1) * (2 * r + 1); |
| |
| // a < 2^16 * n < 2^22 regardless of bit depth |
| uint32_t a = ROUND_POWER_OF_TWO(A[k], 2 * (bit_depth - 8)); |
| // b < 2^8 * n < 2^14 regardless of bit depth |
| uint32_t b = ROUND_POWER_OF_TWO(B[k], bit_depth - 8); |
| |
| // Each term in calculating p = a * n - b * b is < 2^16 * n^2 < 2^28, |
| // and p itself satisfies p < 2^14 * n^2 < 2^26. |
| // This bound on p is due to: |
| // https://en.wikipedia.org/wiki/Popoviciu's_inequality_on_variances |
| // |
| // Note: Sometimes, in high bit depth, we can end up with a*n < b*b. |
| // This is an artefact of rounding, and can only happen if all pixels |
| // are (almost) identical, so in this case we saturate to p=0. |
| uint32_t p = (a * n < b * b) ? 0 : a * n - b * b; |
| |
| const uint32_t s = params->s[radius_idx]; |
| |
| // p * s < (2^14 * n^2) * round(2^20 / n^2 eps) < 2^34 / eps < 2^32 |
| // as long as eps >= 4. So p * s fits into a uint32_t, and z < 2^12 |
| // (this holds even after accounting for the rounding in s) |
| const uint32_t z = ROUND_POWER_OF_TWO(p * s, SGRPROJ_MTABLE_BITS); |
| |
| // Note: We have to be quite careful about the value of A[k]. |
| // This is used as a blend factor between individual pixel values and the |
| // local mean. So it logically has a range of [0, 256], including both |
| // endpoints. |
| // |
| // This is a pain for hardware, as we'd like something which can be stored |
| // in exactly 8 bits. |
| // Further, in the calculation of B[k] below, if z == 0 and r == 2, |
| // then A[k] "should be" 0. But then we can end up setting B[k] to a value |
| // slightly above 2^(8 + bit depth), due to rounding in the value of |
| // av1_one_by_x[25-1]. |
| // |
| // Thus we saturate so that, when z == 0, A[k] is set to 1 instead of 0. |
| // This fixes the above issues (256 - A[k] fits in a uint8, and we can't |
| // overflow), without significantly affecting the final result: z == 0 |
| // implies that the image is essentially "flat", so the local mean and |
| // individual pixel values are very similar. |
| // |
| // Note that saturating on the other side, ie. requring A[k] <= 255, |
| // would be a bad idea, as that corresponds to the case where the image |
| // is very variable, when we want to preserve the local pixel value as |
| // much as possible. |
| A[k] = av1_x_by_xplus1[AOMMIN(z, 255)]; // in range [1, 256] |
| |
| // SGRPROJ_SGR - A[k] < 2^8 (from above), B[k] < 2^(bit_depth) * n, |
| // av1_one_by_x[n - 1] = round(2^12 / n) |
| // => the product here is < 2^(20 + bit_depth) <= 2^32, |
| // and B[k] is set to a value < 2^(8 + bit depth) |
| // This holds even with the rounding in av1_one_by_x and in the overall |
| // result, as long as SGRPROJ_SGR - A[k] is strictly less than 2^8. |
| B[k] = (int32_t)ROUND_POWER_OF_TWO((uint32_t)(SGRPROJ_SGR - A[k]) * |
| (uint32_t)B[k] * |
| (uint32_t)av1_one_by_x[n - 1], |
| SGRPROJ_RECIP_BITS); |
| } |
| } |
| } |
| |
| static void selfguided_restoration_fast_internal( |
| int32_t *dgd, int width, int height, int dgd_stride, int32_t *dst, |
| int dst_stride, int bit_depth, int sgr_params_idx, int radius_idx) { |
| const sgr_params_type *const params = &av1_sgr_params[sgr_params_idx]; |
| const int r = params->r[radius_idx]; |
| const int width_ext = width + 2 * SGRPROJ_BORDER_HORZ; |
| // Adjusting the stride of A and B here appears to avoid bad cache effects, |
| // leading to a significant speed improvement. |
| // We also align the stride to a multiple of 16 bytes, for consistency |
| // with the SIMD version of this function. |
| int buf_stride = ((width_ext + 3) & ~3) + 16; |
| int32_t A_[RESTORATION_PROC_UNIT_PELS]; |
| int32_t B_[RESTORATION_PROC_UNIT_PELS]; |
| int32_t *A = A_; |
| int32_t *B = B_; |
| int i, j; |
| calculate_intermediate_result(dgd, width, height, dgd_stride, bit_depth, |
| sgr_params_idx, radius_idx, 1, A, B); |
| A += SGRPROJ_BORDER_VERT * buf_stride + SGRPROJ_BORDER_HORZ; |
| B += SGRPROJ_BORDER_VERT * buf_stride + SGRPROJ_BORDER_HORZ; |
| |
| // Use the A[] and B[] arrays to calculate the filtered image |
| (void)r; |
| assert(r == 2); |
| for (i = 0; i < height; ++i) { |
| if (!(i & 1)) { // even row |
| for (j = 0; j < width; ++j) { |
| const int k = i * buf_stride + j; |
| const int l = i * dgd_stride + j; |
| const int m = i * dst_stride + j; |
| const int nb = 5; |
| const int32_t a = (A[k - buf_stride] + A[k + buf_stride]) * 6 + |
| (A[k - 1 - buf_stride] + A[k - 1 + buf_stride] + |
| A[k + 1 - buf_stride] + A[k + 1 + buf_stride]) * |
| 5; |
| const int32_t b = (B[k - buf_stride] + B[k + buf_stride]) * 6 + |
| (B[k - 1 - buf_stride] + B[k - 1 + buf_stride] + |
| B[k + 1 - buf_stride] + B[k + 1 + buf_stride]) * |
| 5; |
| const int32_t v = a * dgd[l] + b; |
| dst[m] = |
| ROUND_POWER_OF_TWO(v, SGRPROJ_SGR_BITS + nb - SGRPROJ_RST_BITS); |
| } |
| } else { // odd row |
| for (j = 0; j < width; ++j) { |
| const int k = i * buf_stride + j; |
| const int l = i * dgd_stride + j; |
| const int m = i * dst_stride + j; |
| const int nb = 4; |
| const int32_t a = A[k] * 6 + (A[k - 1] + A[k + 1]) * 5; |
| const int32_t b = B[k] * 6 + (B[k - 1] + B[k + 1]) * 5; |
| const int32_t v = a * dgd[l] + b; |
| dst[m] = |
| ROUND_POWER_OF_TWO(v, SGRPROJ_SGR_BITS + nb - SGRPROJ_RST_BITS); |
| } |
| } |
| } |
| } |
| |
| static void selfguided_restoration_internal(int32_t *dgd, int width, int height, |
| int dgd_stride, int32_t *dst, |
| int dst_stride, int bit_depth, |
| int sgr_params_idx, |
| int radius_idx) { |
| const int width_ext = width + 2 * SGRPROJ_BORDER_HORZ; |
| // Adjusting the stride of A and B here appears to avoid bad cache effects, |
| // leading to a significant speed improvement. |
| // We also align the stride to a multiple of 16 bytes, for consistency |
| // with the SIMD version of this function. |
| int buf_stride = ((width_ext + 3) & ~3) + 16; |
| int32_t A_[RESTORATION_PROC_UNIT_PELS]; |
| int32_t B_[RESTORATION_PROC_UNIT_PELS]; |
| int32_t *A = A_; |
| int32_t *B = B_; |
| int i, j; |
| calculate_intermediate_result(dgd, width, height, dgd_stride, bit_depth, |
| sgr_params_idx, radius_idx, 0, A, B); |
| A += SGRPROJ_BORDER_VERT * buf_stride + SGRPROJ_BORDER_HORZ; |
| B += SGRPROJ_BORDER_VERT * buf_stride + SGRPROJ_BORDER_HORZ; |
| |
| // Use the A[] and B[] arrays to calculate the filtered image |
| for (i = 0; i < height; ++i) { |
| for (j = 0; j < width; ++j) { |
| const int k = i * buf_stride + j; |
| const int l = i * dgd_stride + j; |
| const int m = i * dst_stride + j; |
| const int nb = 5; |
| const int32_t a = |
| (A[k] + A[k - 1] + A[k + 1] + A[k - buf_stride] + A[k + buf_stride]) * |
| 4 + |
| (A[k - 1 - buf_stride] + A[k - 1 + buf_stride] + |
| A[k + 1 - buf_stride] + A[k + 1 + buf_stride]) * |
| 3; |
| const int32_t b = |
| (B[k] + B[k - 1] + B[k + 1] + B[k - buf_stride] + B[k + buf_stride]) * |
| 4 + |
| (B[k - 1 - buf_stride] + B[k - 1 + buf_stride] + |
| B[k + 1 - buf_stride] + B[k + 1 + buf_stride]) * |
| 3; |
| const int32_t v = a * dgd[l] + b; |
| dst[m] = ROUND_POWER_OF_TWO(v, SGRPROJ_SGR_BITS + nb - SGRPROJ_RST_BITS); |
| } |
| } |
| } |
| |
| int av1_selfguided_restoration_c(const uint8_t *dgd8, int width, int height, |
| int dgd_stride, int32_t *flt0, int32_t *flt1, |
| int flt_stride, int sgr_params_idx, |
| int bit_depth, int highbd) { |
| int32_t dgd32_[RESTORATION_PROC_UNIT_PELS]; |
| const int dgd32_stride = width + 2 * SGRPROJ_BORDER_HORZ; |
| int32_t *dgd32 = |
| dgd32_ + dgd32_stride * SGRPROJ_BORDER_VERT + SGRPROJ_BORDER_HORZ; |
| |
| if (highbd) { |
| const uint16_t *dgd16 = CONVERT_TO_SHORTPTR(dgd8); |
| for (int i = -SGRPROJ_BORDER_VERT; i < height + SGRPROJ_BORDER_VERT; ++i) { |
| for (int j = -SGRPROJ_BORDER_HORZ; j < width + SGRPROJ_BORDER_HORZ; ++j) { |
| dgd32[i * dgd32_stride + j] = dgd16[i * dgd_stride + j]; |
| } |
| } |
| } else { |
| for (int i = -SGRPROJ_BORDER_VERT; i < height + SGRPROJ_BORDER_VERT; ++i) { |
| for (int j = -SGRPROJ_BORDER_HORZ; j < width + SGRPROJ_BORDER_HORZ; ++j) { |
| dgd32[i * dgd32_stride + j] = dgd8[i * dgd_stride + j]; |
| } |
| } |
| } |
| |
| const sgr_params_type *const params = &av1_sgr_params[sgr_params_idx]; |
| // If params->r == 0 we skip the corresponding filter. We only allow one of |
| // the radii to be 0, as having both equal to 0 would be equivalent to |
| // skipping SGR entirely. |
| assert(!(params->r[0] == 0 && params->r[1] == 0)); |
| |
| if (params->r[0] > 0) |
| selfguided_restoration_fast_internal(dgd32, width, height, dgd32_stride, |
| flt0, flt_stride, bit_depth, |
| sgr_params_idx, 0); |
| if (params->r[1] > 0) |
| selfguided_restoration_internal(dgd32, width, height, dgd32_stride, flt1, |
| flt_stride, bit_depth, sgr_params_idx, 1); |
| return 0; |
| } |
| |
| void av1_apply_selfguided_restoration_c(const uint8_t *dat8, int width, |
| int height, int stride, int eps, |
| const int *xqd, uint8_t *dst8, |
| int dst_stride, int32_t *tmpbuf, |
| int bit_depth, int highbd) { |
| int32_t *flt0 = tmpbuf; |
| int32_t *flt1 = flt0 + RESTORATION_UNITPELS_MAX; |
| assert(width * height <= RESTORATION_UNITPELS_MAX); |
| |
| const int ret = av1_selfguided_restoration_c( |
| dat8, width, height, stride, flt0, flt1, width, eps, bit_depth, highbd); |
| (void)ret; |
| assert(!ret); |
| const sgr_params_type *const params = &av1_sgr_params[eps]; |
| int xq[2]; |
| av1_decode_xq(xqd, xq, params); |
| for (int i = 0; i < height; ++i) { |
| for (int j = 0; j < width; ++j) { |
| const int k = i * width + j; |
| uint8_t *dst8ij = dst8 + i * dst_stride + j; |
| const uint8_t *dat8ij = dat8 + i * stride + j; |
| |
| const uint16_t pre_u = highbd ? *CONVERT_TO_SHORTPTR(dat8ij) : *dat8ij; |
| const int32_t u = (int32_t)pre_u << SGRPROJ_RST_BITS; |
| int32_t v = u << SGRPROJ_PRJ_BITS; |
| // If params->r == 0 then we skipped the filtering in |
| // av1_selfguided_restoration_c, i.e. flt[k] == u |
| if (params->r[0] > 0) v += xq[0] * (flt0[k] - u); |
| if (params->r[1] > 0) v += xq[1] * (flt1[k] - u); |
| const int16_t w = |
| (int16_t)ROUND_POWER_OF_TWO(v, SGRPROJ_PRJ_BITS + SGRPROJ_RST_BITS); |
| |
| const uint16_t out = clip_pixel_highbd(w, bit_depth); |
| if (highbd) |
| *CONVERT_TO_SHORTPTR(dst8ij) = out; |
| else |
| *dst8ij = (uint8_t)out; |
| } |
| } |
| } |
| |
| static void sgrproj_filter_stripe(const RestorationUnitInfo *rui, |
| int stripe_width, int stripe_height, |
| int procunit_width, const uint8_t *src, |
| int src_stride, uint8_t *dst, int dst_stride, |
| int32_t *tmpbuf, int bit_depth) { |
| (void)bit_depth; |
| assert(bit_depth == 8); |
| |
| for (int j = 0; j < stripe_width; j += procunit_width) { |
| int w = AOMMIN(procunit_width, stripe_width - j); |
| av1_apply_selfguided_restoration( |
| src + j, w, stripe_height, src_stride, rui->sgrproj_info.ep, |
| rui->sgrproj_info.xqd, dst + j, dst_stride, tmpbuf, bit_depth, 0); |
| } |
| } |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| static void wiener_filter_stripe_highbd(const RestorationUnitInfo *rui, |
| int stripe_width, int stripe_height, |
| int procunit_width, const uint8_t *src8, |
| int src_stride, uint8_t *dst8, |
| int dst_stride, int32_t *tmpbuf, |
| int bit_depth) { |
| (void)tmpbuf; |
| const ConvolveParams conv_params = get_conv_params_wiener(bit_depth); |
| |
| for (int j = 0; j < stripe_width; j += procunit_width) { |
| int w = AOMMIN(procunit_width, (stripe_width - j + 15) & ~15); |
| const uint8_t *src8_p = src8 + j; |
| uint8_t *dst8_p = dst8 + j; |
| av1_highbd_wiener_convolve_add_src(src8_p, src_stride, dst8_p, dst_stride, |
| rui->wiener_info.hfilter, 16, |
| rui->wiener_info.vfilter, 16, w, |
| stripe_height, &conv_params, bit_depth); |
| } |
| } |
| |
| static void sgrproj_filter_stripe_highbd(const RestorationUnitInfo *rui, |
| int stripe_width, int stripe_height, |
| int procunit_width, |
| const uint8_t *src8, int src_stride, |
| uint8_t *dst8, int dst_stride, |
| int32_t *tmpbuf, int bit_depth) { |
| for (int j = 0; j < stripe_width; j += procunit_width) { |
| int w = AOMMIN(procunit_width, stripe_width - j); |
| av1_apply_selfguided_restoration( |
| src8 + j, w, stripe_height, src_stride, rui->sgrproj_info.ep, |
| rui->sgrproj_info.xqd, dst8 + j, dst_stride, tmpbuf, bit_depth, 1); |
| } |
| } |
| #endif // CONFIG_AV1_HIGHBITDEPTH |
| |
| typedef void (*stripe_filter_fun)(const RestorationUnitInfo *rui, |
| int stripe_width, int stripe_height, |
| int procunit_width, const uint8_t *src, |
| int src_stride, uint8_t *dst, int dst_stride, |
| int32_t *tmpbuf, int bit_depth); |
| |
| #if CONFIG_AV1_HIGHBITDEPTH |
| #define NUM_STRIPE_FILTERS 4 |
| static const stripe_filter_fun stripe_filters[NUM_STRIPE_FILTERS] = { |
| wiener_filter_stripe, sgrproj_filter_stripe, wiener_filter_stripe_highbd, |
| sgrproj_filter_stripe_highbd |
| }; |
| #else |
| #define NUM_STRIPE_FILTERS 2 |
| static const stripe_filter_fun stripe_filters[NUM_STRIPE_FILTERS] = { |
| wiener_filter_stripe, sgrproj_filter_stripe |
| }; |
| #endif // CONFIG_AV1_HIGHBITDEPTH |
| |
| // Filter one restoration unit |
| void av1_loop_restoration_filter_unit( |
| const RestorationTileLimits *limits, const RestorationUnitInfo *rui, |
| const RestorationStripeBoundaries *rsb, RestorationLineBuffers *rlbs, |
| const AV1PixelRect *tile_rect, int tile_stripe0, int ss_x, int ss_y, |
| int highbd, int bit_depth, uint8_t *data8, int stride, uint8_t *dst8, |
| int dst_stride, int32_t *tmpbuf, int optimized_lr) { |
| RestorationType unit_rtype = rui->restoration_type; |
| |
| int unit_h = limits->v_end - limits->v_start; |
| int unit_w = limits->h_end - limits->h_start; |
| uint8_t *data8_tl = data8 + limits->v_start * stride + limits->h_start; |
| uint8_t *dst8_tl = dst8 + limits->v_start * dst_stride + limits->h_start; |
| |
| if (unit_rtype == RESTORE_NONE) { |
| copy_tile(unit_w, unit_h, data8_tl, stride, dst8_tl, dst_stride, highbd); |
| return; |
| } |
| |
| const int filter_idx = 2 * highbd + (unit_rtype == RESTORE_SGRPROJ); |
| assert(filter_idx < NUM_STRIPE_FILTERS); |
| const stripe_filter_fun stripe_filter = stripe_filters[filter_idx]; |
| |
| const int procunit_width = RESTORATION_PROC_UNIT_SIZE >> ss_x; |
| |
| // Convolve the whole tile one stripe at a time |
| RestorationTileLimits remaining_stripes = *limits; |
| int i = 0; |
| while (i < unit_h) { |
| int copy_above, copy_below; |
| remaining_stripes.v_start = limits->v_start + i; |
| |
| get_stripe_boundary_info(&remaining_stripes, tile_rect, ss_y, ©_above, |
| ©_below); |
| |
| const int full_stripe_height = RESTORATION_PROC_UNIT_SIZE >> ss_y; |
| const int runit_offset = RESTORATION_UNIT_OFFSET >> ss_y; |
| |
| // Work out where this stripe's boundaries are within |
| // rsb->stripe_boundary_{above,below} |
| const int tile_stripe = |
| (remaining_stripes.v_start - tile_rect->top + runit_offset) / |
| full_stripe_height; |
| const int frame_stripe = tile_stripe0 + tile_stripe; |
| const int rsb_row = RESTORATION_CTX_VERT * frame_stripe; |
| |
| // Calculate this stripe's height, based on two rules: |
| // * The topmost stripe in each tile is 8 luma pixels shorter than usual. |
| // * We can't extend past the end of the current restoration unit |
| const int nominal_stripe_height = |
| full_stripe_height - ((tile_stripe == 0) ? runit_offset : 0); |
| const int h = AOMMIN(nominal_stripe_height, |
| remaining_stripes.v_end - remaining_stripes.v_start); |
| |
| setup_processing_stripe_boundary(&remaining_stripes, rsb, rsb_row, highbd, |
| h, data8, stride, rlbs, copy_above, |
| copy_below, optimized_lr); |
| |
| stripe_filter(rui, unit_w, h, procunit_width, data8_tl + i * stride, stride, |
| dst8_tl + i * dst_stride, dst_stride, tmpbuf, bit_depth); |
| |
| restore_processing_stripe_boundary(&remaining_stripes, rlbs, highbd, h, |
| data8, stride, copy_above, copy_below, |
| optimized_lr); |
| |
| i += h; |
| } |
| } |
| |
| static void filter_frame_on_unit(const RestorationTileLimits *limits, |
| const AV1PixelRect *tile_rect, |
| int rest_unit_idx, void *priv, int32_t *tmpbuf, |
| RestorationLineBuffers *rlbs) { |
| FilterFrameCtxt *ctxt = (FilterFrameCtxt *)priv; |
| const RestorationInfo *rsi = ctxt->rsi; |
| |
| av1_loop_restoration_filter_unit( |
| limits, &rsi->unit_info[rest_unit_idx], &rsi->boundaries, rlbs, tile_rect, |
| ctxt->tile_stripe0, ctxt->ss_x, ctxt->ss_y, ctxt->highbd, ctxt->bit_depth, |
| ctxt->data8, ctxt->data_stride, ctxt->dst8, ctxt->dst_stride, tmpbuf, |
| rsi->optimized_lr); |
| } |
| |
| void av1_loop_restoration_filter_frame_init(AV1LrStruct *lr_ctxt, |
| YV12_BUFFER_CONFIG *frame, |
| AV1_COMMON *cm, int optimized_lr, |
| int num_planes) { |
| const SequenceHeader *const seq_params = cm->seq_params; |
| const int bit_depth = seq_params->bit_depth; |
| const int highbd = seq_params->use_highbitdepth; |
| lr_ctxt->dst = &cm->rst_frame; |
| |
| const int frame_width = frame->crop_widths[0]; |
| const int frame_height = frame->crop_heights[0]; |
| if (aom_realloc_frame_buffer( |
| lr_ctxt->dst, frame_width, frame_height, seq_params->subsampling_x, |
| seq_params->subsampling_y, highbd, AOM_RESTORATION_FRAME_BORDER, |
| cm->features.byte_alignment, NULL, NULL, NULL, 0) < 0) |
| aom_internal_error(cm->error, AOM_CODEC_MEM_ERROR, |
| "Failed to allocate restoration dst buffer"); |
| |
| lr_ctxt->on_rest_unit = filter_frame_on_unit; |
| lr_ctxt->frame = frame; |
| for (int plane = 0; plane < num_planes; ++plane) { |
| RestorationInfo *rsi = &cm->rst_info[plane]; |
| RestorationType rtype = rsi->frame_restoration_type; |
| rsi->optimized_lr = optimized_lr; |
| |
| if (rtype == RESTORE_NONE) { |
| continue; |
| } |
| |
| const int is_uv = plane > 0; |
| const int plane_width = frame->crop_widths[is_uv]; |
| const int plane_height = frame->crop_heights[is_uv]; |
| FilterFrameCtxt *lr_plane_ctxt = &lr_ctxt->ctxt[plane]; |
| |
| av1_extend_frame(frame->buffers[plane], plane_width, plane_height, |
| frame->strides[is_uv], RESTORATION_BORDER, |
| RESTORATION_BORDER, highbd); |
| |
| lr_plane_ctxt->rsi = rsi; |
| lr_plane_ctxt->ss_x = is_uv && seq_params->subsampling_x; |
| lr_plane_ctxt->ss_y = is_uv && seq_params->subsampling_y; |
| lr_plane_ctxt->highbd = highbd; |
| lr_plane_ctxt->bit_depth = bit_depth; |
| lr_plane_ctxt->data8 = frame->buffers[plane]; |
| lr_plane_ctxt->dst8 = lr_ctxt->dst->buffers[plane]; |
| lr_plane_ctxt->data_stride = frame->strides[is_uv]; |
| lr_plane_ctxt->dst_stride = lr_ctxt->dst->strides[is_uv]; |
| lr_plane_ctxt->tile_rect = av1_whole_frame_rect(cm, is_uv); |
| lr_plane_ctxt->tile_stripe0 = 0; |
| } |
| } |
| |
| void av1_loop_restoration_copy_planes(AV1LrStruct *loop_rest_ctxt, |
| AV1_COMMON *cm, int num_planes) { |
| typedef void (*copy_fun)(const YV12_BUFFER_CONFIG *src_ybc, |
| YV12_BUFFER_CONFIG *dst_ybc, int hstart, int hend, |
| int vstart, int vend); |
| static const copy_fun copy_funs[3] = { aom_yv12_partial_coloc_copy_y, |
| aom_yv12_partial_coloc_copy_u, |
| aom_yv12_partial_coloc_copy_v }; |
| assert(num_planes <= 3); |
| for (int plane = 0; plane < num_planes; ++plane) { |
| if (cm->rst_info[plane].frame_restoration_type == RESTORE_NONE) continue; |
| AV1PixelRect tile_rect = loop_rest_ctxt->ctxt[plane].tile_rect; |
| copy_funs[plane](loop_rest_ctxt->dst, loop_rest_ctxt->frame, tile_rect.left, |
| tile_rect.right, tile_rect.top, tile_rect.bottom); |
| } |
| } |
| |
| static void foreach_rest_unit_in_planes(AV1LrStruct *lr_ctxt, AV1_COMMON *cm, |
| int num_planes) { |
| FilterFrameCtxt *ctxt = lr_ctxt->ctxt; |
| |
| for (int plane = 0; plane < num_planes; ++plane) { |
| if (cm->rst_info[plane].frame_restoration_type == RESTORE_NONE) { |
| continue; |
| } |
| |
| av1_foreach_rest_unit_in_plane(cm, plane, lr_ctxt->on_rest_unit, |
| &ctxt[plane], &ctxt[plane].tile_rect, |
| cm->rst_tmpbuf, cm->rlbs); |
| } |
| } |
| |
| void av1_loop_restoration_filter_frame(YV12_BUFFER_CONFIG *frame, |
| AV1_COMMON *cm, int optimized_lr, |
| void *lr_ctxt) { |
| assert(!cm->features.all_lossless); |
| const int num_planes = av1_num_planes(cm); |
| |
| AV1LrStruct *loop_rest_ctxt = (AV1LrStruct *)lr_ctxt; |
| |
| av1_loop_restoration_filter_frame_init(loop_rest_ctxt, frame, cm, |
| optimized_lr, num_planes); |
| |
| foreach_rest_unit_in_planes(loop_rest_ctxt, cm, num_planes); |
| |
| av1_loop_restoration_copy_planes(loop_rest_ctxt, cm, num_planes); |
| } |
| |
| void av1_foreach_rest_unit_in_row( |
| RestorationTileLimits *limits, const AV1PixelRect *tile_rect, |
| rest_unit_visitor_t on_rest_unit, int row_number, int unit_size, |
| int unit_idx0, int hunits_per_tile, int vunits_per_tile, int plane, |
| void *priv, int32_t *tmpbuf, RestorationLineBuffers *rlbs, |
| sync_read_fn_t on_sync_read, sync_write_fn_t on_sync_write, |
| struct AV1LrSyncData *const lr_sync) { |
| const int tile_w = tile_rect->right - tile_rect->left; |
| const int ext_size = unit_size * 3 / 2; |
| int x0 = 0, j = 0; |
| while (x0 < tile_w) { |
| int remaining_w = tile_w - x0; |
| int w = (remaining_w < ext_size) ? remaining_w : unit_size; |
| |
| limits->h_start = tile_rect->left + x0; |
| limits->h_end = tile_rect->left + x0 + w; |
| assert(limits->h_end <= tile_rect->right); |
| |
| const int unit_idx = unit_idx0 + row_number * hunits_per_tile + j; |
| |
| // No sync for even numbered rows |
| // For odd numbered rows, Loop Restoration of current block requires the LR |
| // of top-right and bottom-right blocks to be completed |
| |
| // top-right sync |
| on_sync_read(lr_sync, row_number, j, plane); |
| if ((row_number + 1) < vunits_per_tile) |
| // bottom-right sync |
| on_sync_read(lr_sync, row_number + 2, j, plane); |
| |
| on_rest_unit(limits, tile_rect, unit_idx, priv, tmpbuf, rlbs); |
| |
| on_sync_write(lr_sync, row_number, j, hunits_per_tile, plane); |
| |
| x0 += w; |
| ++j; |
| } |
| } |
| |
| void av1_lr_sync_read_dummy(void *const lr_sync, int r, int c, int plane) { |
| (void)lr_sync; |
| (void)r; |
| (void)c; |
| (void)plane; |
| } |
| |
| void av1_lr_sync_write_dummy(void *const lr_sync, int r, int c, |
| const int sb_cols, int plane) { |
| (void)lr_sync; |
| (void)r; |
| (void)c; |
| (void)sb_cols; |
| (void)plane; |
| } |
| |
| static void foreach_rest_unit_in_tile( |
| const AV1PixelRect *tile_rect, int tile_row, int tile_col, int tile_cols, |
| int hunits_per_tile, int vunits_per_tile, int units_per_tile, int unit_size, |
| int ss_y, int plane, rest_unit_visitor_t on_rest_unit, void *priv, |
| int32_t *tmpbuf, RestorationLineBuffers *rlbs) { |
| const int tile_h = tile_rect->bottom - tile_rect->top; |
| const int ext_size = unit_size * 3 / 2; |
| |
| const int tile_idx = tile_col + tile_row * tile_cols; |
| const int unit_idx0 = tile_idx * units_per_tile; |
| |
| int y0 = 0, i = 0; |
| while (y0 < tile_h) { |
| int remaining_h = tile_h - y0; |
| int h = (remaining_h < ext_size) ? remaining_h : unit_size; |
| |
| RestorationTileLimits limits; |
| limits.v_start = tile_rect->top + y0; |
| limits.v_end = tile_rect->top + y0 + h; |
| assert(limits.v_end <= tile_rect->bottom); |
| // Offset the tile upwards to align with the restoration processing stripe |
| const int voffset = RESTORATION_UNIT_OFFSET >> ss_y; |
| limits.v_start = AOMMAX(tile_rect->top, limits.v_start - voffset); |
| if (limits.v_end < tile_rect->bottom) limits.v_end -= voffset; |
| |
| av1_foreach_rest_unit_in_row( |
| &limits, tile_rect, on_rest_unit, i, unit_size, unit_idx0, |
| hunits_per_tile, vunits_per_tile, plane, priv, tmpbuf, rlbs, |
| av1_lr_sync_read_dummy, av1_lr_sync_write_dummy, NULL); |
| |
| y0 += h; |
| ++i; |
| } |
| } |
| |
| void av1_foreach_rest_unit_in_plane(const struct AV1Common *cm, int plane, |
| rest_unit_visitor_t on_rest_unit, |
| void *priv, AV1PixelRect *tile_rect, |
| int32_t *tmpbuf, |
| RestorationLineBuffers *rlbs) { |
| const int is_uv = plane > 0; |
| const int ss_y = is_uv && cm->seq_params->subsampling_y; |
| |
| const RestorationInfo *rsi = &cm->rst_info[plane]; |
| |
| foreach_rest_unit_in_tile(tile_rect, LR_TILE_ROW, LR_TILE_COL, LR_TILE_COLS, |
| rsi->horz_units_per_tile, rsi->vert_units_per_tile, |
| rsi->units_per_tile, rsi->restoration_unit_size, |
| ss_y, plane, on_rest_unit, priv, tmpbuf, rlbs); |
| } |
| |
| int av1_loop_restoration_corners_in_sb(const struct AV1Common *cm, int plane, |
| int mi_row, int mi_col, BLOCK_SIZE bsize, |
| int *rcol0, int *rcol1, int *rrow0, |
| int *rrow1) { |
| assert(rcol0 && rcol1 && rrow0 && rrow1); |
| |
| if (bsize != cm->seq_params->sb_size) return 0; |
| if (cm->rst_info[plane].frame_restoration_type == RESTORE_NONE) return 0; |
| |
| assert(!cm->features.all_lossless); |
| |
| const int is_uv = plane > 0; |
| |
| const AV1PixelRect tile_rect = av1_whole_frame_rect(cm, is_uv); |
| const int tile_w = tile_rect.right - tile_rect.left; |
| const int tile_h = tile_rect.bottom - tile_rect.top; |
| |
| const int mi_top = 0; |
| const int mi_left = 0; |
| |
| // Compute the mi-unit corners of the superblock relative to the top-left of |
| // the tile |
| const int mi_rel_row0 = mi_row - mi_top; |
| const int mi_rel_col0 = mi_col - mi_left; |
| const int mi_rel_row1 = mi_rel_row0 + mi_size_high[bsize]; |
| const int mi_rel_col1 = mi_rel_col0 + mi_size_wide[bsize]; |
| |
| const RestorationInfo *rsi = &cm->rst_info[plane]; |
| const int size = rsi->restoration_unit_size; |
| |
| // Calculate the number of restoration units in this tile (which might be |
| // strictly less than rsi->horz_units_per_tile and rsi->vert_units_per_tile) |
| const int horz_units = av1_lr_count_units_in_tile(size, tile_w); |
| const int vert_units = av1_lr_count_units_in_tile(size, tile_h); |
| |
| // The size of an MI-unit on this plane of the image |
| const int ss_x = is_uv && cm->seq_params->subsampling_x; |
| const int ss_y = is_uv && cm->seq_params->subsampling_y; |
| const int mi_size_x = MI_SIZE >> ss_x; |
| const int mi_size_y = MI_SIZE >> ss_y; |
| |
| // Write m for the relative mi column or row, D for the superres denominator |
| // and N for the superres numerator. If u is the upscaled pixel offset then |
| // we can write the downscaled pixel offset in two ways as: |
| // |
| // MI_SIZE * m = N / D u |
| // |
| // from which we get u = D * MI_SIZE * m / N |
| const int mi_to_num_x = av1_superres_scaled(cm) |
| ? mi_size_x * cm->superres_scale_denominator |
| : mi_size_x; |
| const int mi_to_num_y = mi_size_y; |
| const int denom_x = av1_superres_scaled(cm) ? size * SCALE_NUMERATOR : size; |
| const int denom_y = size; |
| |
| const int rnd_x = denom_x - 1; |
| const int rnd_y = denom_y - 1; |
| |
| // rcol0/rrow0 should be the first column/row of restoration units (relative |
| // to the top-left of the tile) that doesn't start left/below of |
| // mi_col/mi_row. For this calculation, we need to round up the division (if |
| // the sb starts at runit column 10.1, the first matching runit has column |
| // index 11) |
| *rcol0 = (mi_rel_col0 * mi_to_num_x + rnd_x) / denom_x; |
| *rrow0 = (mi_rel_row0 * mi_to_num_y + rnd_y) / denom_y; |
| |
| // rel_col1/rel_row1 is the equivalent calculation, but for the superblock |
| // below-right. If we're at the bottom or right of the tile, this restoration |
| // unit might not exist, in which case we'll clamp accordingly. |
| *rcol1 = AOMMIN((mi_rel_col1 * mi_to_num_x + rnd_x) / denom_x, horz_units); |
| *rrow1 = AOMMIN((mi_rel_row1 * mi_to_num_y + rnd_y) / denom_y, vert_units); |
| |
| return *rcol0 < *rcol1 && *rrow0 < *rrow1; |
| } |
| |
| // Extend to left and right |
| static void extend_lines(uint8_t *buf, int width, int height, int stride, |
| int extend, int use_highbitdepth) { |
| for (int i = 0; i < height; ++i) { |
| if (use_highbitdepth) { |
| uint16_t *buf16 = (uint16_t *)buf; |
| aom_memset16(buf16 - extend, buf16[0], extend); |
| aom_memset16(buf16 + width, buf16[width - 1], extend); |
| } else { |
| memset(buf - extend, buf[0], extend); |
| memset(buf + width, buf[width - 1], extend); |
| } |
| buf += stride; |
| } |
| } |
| |
| static void save_deblock_boundary_lines( |
| const YV12_BUFFER_CONFIG *frame, const AV1_COMMON *cm, int plane, int row, |
| int stripe, int use_highbd, int is_above, |
| RestorationStripeBoundaries *boundaries) { |
| const int is_uv = plane > 0; |
| const uint8_t *src_buf = REAL_PTR(use_highbd, frame->buffers[plane]); |
| const int src_stride = frame->strides[is_uv] << use_highbd; |
| const uint8_t *src_rows = src_buf + row * src_stride; |
| |
| uint8_t *bdry_buf = is_above ? boundaries->stripe_boundary_above |
| : boundaries->stripe_boundary_below; |
| uint8_t *bdry_start = bdry_buf + (RESTORATION_EXTRA_HORZ << use_highbd); |
| const int bdry_stride = boundaries->stripe_boundary_stride << use_highbd; |
| uint8_t *bdry_rows = bdry_start + RESTORATION_CTX_VERT * stripe * bdry_stride; |
| |
| // There is a rare case in which a processing stripe can end 1px above the |
| // crop border. In this case, we do want to use deblocked pixels from below |
| // the stripe (hence why we ended up in this function), but instead of |
| // fetching 2 "below" rows we need to fetch one and duplicate it. |
| // This is equivalent to clamping the sample locations against the crop border |
| const int lines_to_save = |
| AOMMIN(RESTORATION_CTX_VERT, frame->crop_heights[is_uv] - row); |
| assert(lines_to_save == 1 || lines_to_save == 2); |
| |
| int upscaled_width; |
| int line_bytes; |
| if (av1_superres_scaled(cm)) { |
| const int ss_x = is_uv && cm->seq_params->subsampling_x; |
| upscaled_width = (cm->superres_upscaled_width + ss_x) >> ss_x; |
| line_bytes = upscaled_width << use_highbd; |
| if (use_highbd) |
| av1_upscale_normative_rows( |
| cm, CONVERT_TO_BYTEPTR(src_rows), frame->strides[is_uv], |
| CONVERT_TO_BYTEPTR(bdry_rows), boundaries->stripe_boundary_stride, |
| plane, lines_to_save); |
| else |
| av1_upscale_normative_rows(cm, src_rows, frame->strides[is_uv], bdry_rows, |
| boundaries->stripe_boundary_stride, plane, |
| lines_to_save); |
| } else { |
| upscaled_width = frame->crop_widths[is_uv]; |
| line_bytes = upscaled_width << use_highbd; |
| for (int i = 0; i < lines_to_save; i++) { |
| memcpy(bdry_rows + i * bdry_stride, src_rows + i * src_stride, |
| line_bytes); |
| } |
| } |
| // If we only saved one line, then copy it into the second line buffer |
| if (lines_to_save == 1) |
| memcpy(bdry_rows + bdry_stride, bdry_rows, line_bytes); |
| |
| extend_lines(bdry_rows, upscaled_width, RESTORATION_CTX_VERT, bdry_stride, |
| RESTORATION_EXTRA_HORZ, use_highbd); |
| } |
| |
| static void save_cdef_boundary_lines(const YV12_BUFFER_CONFIG *frame, |
| const AV1_COMMON *cm, int plane, int row, |
| int stripe, int use_highbd, int is_above, |
| RestorationStripeBoundaries *boundaries) { |
| const int is_uv = plane > 0; |
| const uint8_t *src_buf = REAL_PTR(use_highbd, frame->buffers[plane]); |
| const int src_stride = frame->strides[is_uv] << use_highbd; |
| const uint8_t *src_rows = src_buf + row * src_stride; |
| |
| uint8_t *bdry_buf = is_above ? boundaries->stripe_boundary_above |
| : boundaries->stripe_boundary_below; |
| uint8_t *bdry_start = bdry_buf + (RESTORATION_EXTRA_HORZ << use_highbd); |
| const int bdry_stride = boundaries->stripe_boundary_stride << use_highbd; |
| uint8_t *bdry_rows = bdry_start + RESTORATION_CTX_VERT * stripe * bdry_stride; |
| const int src_width = frame->crop_widths[is_uv]; |
| |
| // At the point where this function is called, we've already applied |
| // superres. So we don't need to extend the lines here, we can just |
| // pull directly from the topmost row of the upscaled frame. |
| const int ss_x = is_uv && cm->seq_params->subsampling_x; |
| const int upscaled_width = av1_superres_scaled(cm) |
| ? (cm->superres_upscaled_width + ss_x) >> ss_x |
| : src_width; |
| const int line_bytes = upscaled_width << use_highbd; |
| for (int i = 0; i < RESTORATION_CTX_VERT; i++) { |
| // Copy the line at 'row' into both context lines. This is because |
| // we want to (effectively) extend the outermost row of CDEF data |
| // from this tile to produce a border, rather than using deblocked |
| // pixels from the tile above/below. |
| memcpy(bdry_rows + i * bdry_stride, src_rows, line_bytes); |
| } |
| extend_lines(bdry_rows, upscaled_width, RESTORATION_CTX_VERT, bdry_stride, |
| RESTORATION_EXTRA_HORZ, use_highbd); |
| } |
| |
| static void save_tile_row_boundary_lines(const YV12_BUFFER_CONFIG *frame, |
| int use_highbd, int plane, |
| AV1_COMMON *cm, int after_cdef) { |
| const int is_uv = plane > 0; |
| const int ss_y = is_uv && cm->seq_params->subsampling_y; |
| const int stripe_height = RESTORATION_PROC_UNIT_SIZE >> ss_y; |
| const int stripe_off = RESTORATION_UNIT_OFFSET >> ss_y; |
| |
| // Get the tile rectangle, with height rounded up to the next multiple of 8 |
| // luma pixels (only relevant for the bottom tile of the frame) |
| const AV1PixelRect tile_rect = av1_whole_frame_rect(cm, is_uv); |
| const int stripe0 = 0; |
| |
| RestorationStripeBoundaries *boundaries = &cm->rst_info[plane].boundaries; |
| |
| const int plane_height = ROUND_POWER_OF_TWO(cm->height, ss_y); |
| |
| int tile_stripe; |
| for (tile_stripe = 0;; ++tile_stripe) { |
| const int rel_y0 = AOMMAX(0, tile_stripe * stripe_height - stripe_off); |
| const int y0 = tile_rect.top + rel_y0; |
| if (y0 >= tile_rect.bottom) break; |
| |
| const int rel_y1 = (tile_stripe + 1) * stripe_height - stripe_off; |
| const int y1 = AOMMIN(tile_rect.top + rel_y1, tile_rect.bottom); |
| |
| const int frame_stripe = stripe0 + tile_stripe; |
| |
| // In this case, we should only use CDEF pixels at the top |
| // and bottom of the frame as a whole; internal tile boundaries |
| // can use deblocked pixels from adjacent tiles for context. |
| const int use_deblock_above = (frame_stripe > 0); |
| const int use_deblock_below = (y1 < plane_height); |
| |
| if (!after_cdef) { |
| // Save deblocked context where needed. |
| if (use_deblock_above) { |
| save_deblock_boundary_lines(frame, cm, plane, y0 - RESTORATION_CTX_VERT, |
| frame_stripe, use_highbd, 1, boundaries); |
| } |
| if (use_deblock_below) { |
| save_deblock_boundary_lines(frame, cm, plane, y1, frame_stripe, |
| use_highbd, 0, boundaries); |
| } |
| } else { |
| // Save CDEF context where needed. Note that we need to save the CDEF |
| // context for a particular boundary iff we *didn't* save deblocked |
| // context for that boundary. |
| // |
| // In addition, we need to save copies of the outermost line within |
| // the tile, rather than using data from outside the tile. |
| if (!use_deblock_above) { |
| save_cdef_boundary_lines(frame, cm, plane, y0, frame_stripe, use_highbd, |
| 1, boundaries); |
| } |
| if (!use_deblock_below) { |
| save_cdef_boundary_lines(frame, cm, plane, y1 - 1, frame_stripe, |
| use_highbd, 0, boundaries); |
| } |
| } |
| } |
| } |
| |
| // For each RESTORATION_PROC_UNIT_SIZE pixel high stripe, save 4 scan |
| // lines to be used as boundary in the loop restoration process. The |
| // lines are saved in rst_internal.stripe_boundary_lines |
| void av1_loop_restoration_save_boundary_lines(const YV12_BUFFER_CONFIG *frame, |
| AV1_COMMON *cm, int after_cdef) { |
| const int num_planes = av1_num_planes(cm); |
| const int use_highbd = cm->seq_params->use_highbitdepth; |
| for (int p = 0; p < num_planes; ++p) { |
| save_tile_row_boundary_lines(frame, use_highbd, p, cm, after_cdef); |
| } |
| } |