| /* | |
| * 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 "av1/common/clpf.h" | |
| #include "./aom_dsp_rtcd.h" | |
| #include "aom/aom_image.h" | |
| #include "aom_dsp/aom_dsp_common.h" | |
| int av1_clpf_sample(int X, int A, int B, int C, int D, int E, int F, int b) { | |
| int delta = 4 * clamp(A - X, -b, b) + clamp(B - X, -b, b) + | |
| 3 * clamp(C - X, -b, b) + 3 * clamp(D - X, -b, b) + | |
| clamp(E - X, -b, b) + 4 * clamp(F - X, -b, b); | |
| return (8 + delta - (delta < 0)) >> 4; | |
| } | |
| void aom_clpf_block_c(const uint8_t *src, uint8_t *dst, int sstride, | |
| int dstride, int x0, int y0, int sizex, int sizey, | |
| int width, int height, unsigned int strength) { | |
| int x, y; | |
| for (y = y0; y < y0 + sizey; y++) { | |
| for (x = x0; x < x0 + sizex; x++) { | |
| int X = src[y * sstride + x]; | |
| int A = src[AOMMAX(0, y - 1) * sstride + x]; | |
| int B = src[y * sstride + AOMMAX(0, x - 2)]; | |
| int C = src[y * sstride + AOMMAX(0, x - 1)]; | |
| int D = src[y * sstride + AOMMIN(width - 1, x + 1)]; | |
| int E = src[y * sstride + AOMMIN(width - 1, x + 2)]; | |
| int F = src[AOMMIN(height - 1, y + 1) * sstride + x]; | |
| int delta; | |
| delta = av1_clpf_sample(X, A, B, C, D, E, F, strength); | |
| dst[y * dstride + x] = X + delta; | |
| } | |
| } | |
| } | |
| #if CONFIG_AOM_HIGHBITDEPTH | |
| // Identical to aom_clpf_block_c() apart from "src" and "dst". | |
| void aom_clpf_block_hbd_c(const uint16_t *src, uint16_t *dst, int sstride, | |
| int dstride, int x0, int y0, int sizex, int sizey, | |
| int width, int height, unsigned int strength) { | |
| int x, y; | |
| for (y = y0; y < y0 + sizey; y++) { | |
| for (x = x0; x < x0 + sizex; x++) { | |
| int X = src[y * sstride + x]; | |
| int A = src[AOMMAX(0, y - 1) * sstride + x]; | |
| int B = src[y * sstride + AOMMAX(0, x - 2)]; | |
| int C = src[y * sstride + AOMMAX(0, x - 1)]; | |
| int D = src[y * sstride + AOMMIN(width - 1, x + 1)]; | |
| int E = src[y * sstride + AOMMIN(width - 1, x + 2)]; | |
| int F = src[AOMMIN(height - 1, y + 1) * sstride + x]; | |
| int delta; | |
| delta = av1_clpf_sample(X, A, B, C, D, E, F, strength); | |
| dst[y * dstride + x] = X + delta; | |
| } | |
| } | |
| } | |
| #endif | |
| // Return number of filtered blocks | |
| void av1_clpf_frame(const YV12_BUFFER_CONFIG *frame, | |
| const YV12_BUFFER_CONFIG *org, AV1_COMMON *cm, | |
| int enable_fb_flag, unsigned int strength, | |
| unsigned int fb_size_log2, int plane, | |
| int (*decision)(int, int, const YV12_BUFFER_CONFIG *, | |
| const YV12_BUFFER_CONFIG *, | |
| const AV1_COMMON *cm, int, int, int, | |
| unsigned int, unsigned int, int8_t *)) { | |
| /* Constrained low-pass filter (CLPF) */ | |
| int c, k, l, m, n; | |
| const int subx = plane != AOM_PLANE_Y && frame->subsampling_x; | |
| const int suby = plane != AOM_PLANE_Y && frame->subsampling_y; | |
| const int bs = (subx || suby) ? 4 : 8; | |
| const int bslog = get_msb(bs); | |
| int width = plane != AOM_PLANE_Y ? frame->uv_crop_width : frame->y_crop_width; | |
| int height = | |
| plane != AOM_PLANE_Y ? frame->uv_crop_height : frame->y_crop_height; | |
| int xpos, ypos; | |
| const int sstride = plane != AOM_PLANE_Y ? frame->uv_stride : frame->y_stride; | |
| int dstride = bs; | |
| const int num_fb_hor = (width + (1 << fb_size_log2) - 1) >> fb_size_log2; | |
| const int num_fb_ver = (height + (1 << fb_size_log2) - 1) >> fb_size_log2; | |
| uint8_t *cache = NULL; | |
| uint8_t **cache_ptr = NULL; | |
| uint8_t **cache_dst = NULL; | |
| int cache_idx = 0; | |
| const int cache_size = num_fb_hor << (2 * fb_size_log2); | |
| const int cache_blocks = cache_size / (bs * bs); | |
| uint8_t *src_buffer = | |
| plane != AOM_PLANE_Y | |
| ? (plane == AOM_PLANE_U ? frame->u_buffer : frame->v_buffer) | |
| : frame->y_buffer; | |
| uint8_t *dst_buffer; | |
| // Make buffer space for in-place filtering | |
| #if CONFIG_AOM_HIGHBITDEPTH | |
| strength <<= (cm->bit_depth - 8); | |
| CHECK_MEM_ERROR(cm, cache, aom_malloc(cache_size << !!cm->use_highbitdepth)); | |
| dst_buffer = cm->use_highbitdepth ? CONVERT_TO_BYTEPTR(cache) : cache; | |
| #else | |
| CHECK_MEM_ERROR(cm, cache, aom_malloc(cache_size)); | |
| dst_buffer = cache; | |
| #endif | |
| CHECK_MEM_ERROR(cm, cache_ptr, aom_malloc(cache_blocks * sizeof(*cache_ptr))); | |
| CHECK_MEM_ERROR(cm, cache_dst, aom_malloc(cache_blocks * sizeof(*cache_dst))); | |
| memset(cache_ptr, 0, cache_blocks * sizeof(*cache_dst)); | |
| // Iterate over all filter blocks | |
| for (k = 0; k < num_fb_ver; k++) { | |
| for (l = 0; l < num_fb_hor; l++) { | |
| int h, w; | |
| int allskip = !(enable_fb_flag && fb_size_log2 == MAX_FB_SIZE_LOG2); | |
| const int xoff = l << fb_size_log2; | |
| const int yoff = k << fb_size_log2; | |
| for (m = 0; allskip && m < (1 << fb_size_log2) / bs; m++) { | |
| for (n = 0; allskip && n < (1 << fb_size_log2) / bs; n++) { | |
| xpos = xoff + n * bs; | |
| ypos = yoff + m * bs; | |
| if (xpos < width && ypos < height) { | |
| allskip &= | |
| cm->mi_grid_visible[(ypos << suby) / MI_SIZE * cm->mi_stride + | |
| (xpos << subx) / MI_SIZE] | |
| ->mbmi.skip; | |
| } | |
| } | |
| } | |
| // Calculate the actual filter block size near frame edges | |
| h = AOMMIN(height, (k + 1) << fb_size_log2) & ((1 << fb_size_log2) - 1); | |
| w = AOMMIN(width, (l + 1) << fb_size_log2) & ((1 << fb_size_log2) - 1); | |
| h += !h << fb_size_log2; | |
| w += !w << fb_size_log2; | |
| if (!allskip && // Do not filter the block if all is skip encoded | |
| (!enable_fb_flag || | |
| // Only called if fb_flag enabled (luma only) | |
| decision(k, l, frame, org, cm, bs, w / bs, h / bs, strength, | |
| fb_size_log2, | |
| cm->clpf_blocks + yoff / MIN_FB_SIZE * cm->clpf_stride + | |
| xoff / MIN_FB_SIZE))) { | |
| // Iterate over all smaller blocks inside the filter block | |
| for (m = 0; m < ((h + bs - 1) >> bslog); m++) { | |
| for (n = 0; n < ((w + bs - 1) >> bslog); n++) { | |
| int sizex, sizey; | |
| xpos = xoff + n * bs; | |
| ypos = yoff + m * bs; | |
| sizex = AOMMIN(width - xpos, bs); | |
| sizey = AOMMIN(height - ypos, bs); | |
| if (!cm->mi_grid_visible[(ypos << suby) / MI_SIZE * cm->mi_stride + | |
| (xpos << subx) / MI_SIZE] | |
| ->mbmi.skip || | |
| (enable_fb_flag && fb_size_log2 == MAX_FB_SIZE_LOG2)) { | |
| // Temporary buffering needed for in-place filtering | |
| if (cache_ptr[cache_idx]) { | |
| // Copy filtered block back into the frame | |
| #if CONFIG_AOM_HIGHBITDEPTH | |
| if (cm->use_highbitdepth) { | |
| uint16_t *const d = CONVERT_TO_SHORTPTR(cache_dst[cache_idx]); | |
| if (sizex == 8) { | |
| for (c = 0; c < sizey; c++) { | |
| *(uint64_t *)(d + c * sstride) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs * 2); | |
| *(uint64_t *)(d + c * sstride + 4) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs * 2 + 8); | |
| } | |
| } else if (sizex == 4) { | |
| for (c = 0; c < sizey; c++) | |
| *(uint64_t *)(d + c * sstride) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs * 2); | |
| } else { | |
| for (c = 0; c < sizey; c++) | |
| memcpy(d + c * sstride, cache_ptr[cache_idx] + c * bs * 2, | |
| sizex); | |
| } | |
| } else { | |
| if (sizex == 8) | |
| for (c = 0; c < sizey; c++) | |
| *(uint64_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs); | |
| else if (sizex == 4) | |
| for (c = 0; c < sizey; c++) | |
| *(uint32_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint32_t *)(cache_ptr[cache_idx] + c * bs); | |
| else | |
| for (c = 0; c < sizey; c++) | |
| memcpy(cache_dst[cache_idx] + c * sstride, | |
| cache_ptr[cache_idx] + c * bs, sizex); | |
| } | |
| #else | |
| if (sizex == 8) | |
| for (c = 0; c < sizey; c++) | |
| *(uint64_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs); | |
| else if (sizex == 4) | |
| for (c = 0; c < sizey; c++) | |
| *(uint32_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint32_t *)(cache_ptr[cache_idx] + c * bs); | |
| else | |
| for (c = 0; c < sizey; c++) | |
| memcpy(cache_dst[cache_idx] + c * sstride, | |
| cache_ptr[cache_idx] + c * bs, sizex); | |
| #endif | |
| } | |
| #if CONFIG_AOM_HIGHBITDEPTH | |
| if (cm->use_highbitdepth) { | |
| cache_ptr[cache_idx] = cache + cache_idx * bs * bs * 2; | |
| dst_buffer = | |
| CONVERT_TO_BYTEPTR(cache_ptr[cache_idx]) - ypos * bs - xpos; | |
| } else { | |
| cache_ptr[cache_idx] = cache + cache_idx * bs * bs; | |
| dst_buffer = cache_ptr[cache_idx] - ypos * bs - xpos; | |
| } | |
| #else | |
| cache_ptr[cache_idx] = cache + cache_idx * bs * bs; | |
| dst_buffer = cache_ptr[cache_idx] - ypos * bs - xpos; | |
| #endif | |
| cache_dst[cache_idx] = src_buffer + ypos * sstride + xpos; | |
| if (++cache_idx >= cache_blocks) cache_idx = 0; | |
| // Apply the filter | |
| #if CONFIG_AOM_HIGHBITDEPTH | |
| if (cm->use_highbitdepth) { | |
| aom_clpf_block_hbd(CONVERT_TO_SHORTPTR(src_buffer), | |
| CONVERT_TO_SHORTPTR(dst_buffer), sstride, | |
| dstride, xpos, ypos, sizex, sizey, width, | |
| height, strength); | |
| } else { | |
| aom_clpf_block(src_buffer, dst_buffer, sstride, dstride, xpos, | |
| ypos, sizex, sizey, width, height, strength); | |
| } | |
| #else | |
| aom_clpf_block(src_buffer, dst_buffer, sstride, dstride, xpos, | |
| ypos, sizex, sizey, width, height, strength); | |
| #endif | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| // Copy remaining blocks into the frame | |
| for (cache_idx = 0; cache_idx < cache_blocks && cache_ptr[cache_idx]; | |
| cache_idx++) { | |
| #if CONFIG_AOM_HIGHBITDEPTH | |
| if (cm->use_highbitdepth) { | |
| uint16_t *const d = CONVERT_TO_SHORTPTR(cache_dst[cache_idx]); | |
| for (c = 0; c < bs; c++) { | |
| *(uint64_t *)(d + c * sstride) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs * 2); | |
| if (bs == 8) | |
| *(uint64_t *)(d + c * sstride + 4) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs * 2 + 8); | |
| } | |
| } else { | |
| for (c = 0; c < bs; c++) | |
| if (bs == 4) | |
| *(uint32_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint32_t *)(cache_ptr[cache_idx] + c * bs); | |
| else | |
| *(uint64_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs); | |
| } | |
| #else | |
| for (c = 0; c < bs; c++) | |
| if (bs == 4) | |
| *(uint32_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint32_t *)(cache_ptr[cache_idx] + c * bs); | |
| else | |
| *(uint64_t *)(cache_dst[cache_idx] + c * sstride) = | |
| *(uint64_t *)(cache_ptr[cache_idx] + c * bs); | |
| #endif | |
| } | |
| aom_free(cache); | |
| aom_free(cache_ptr); | |
| aom_free(cache_dst); | |
| } |