|  | /* | 
|  | * 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 <string.h> | 
|  |  | 
|  | #include "./aom_config.h" | 
|  | #include "./aom_dsp_rtcd.h" | 
|  | #include "aom/aom_integer.h" | 
|  | #include "aom_dsp/aom_convolve.h" | 
|  | #include "aom_dsp/aom_dsp_common.h" | 
|  | #include "aom_dsp/aom_filter.h" | 
|  | #include "aom_ports/mem.h" | 
|  |  | 
|  | static void convolve_horiz(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *x_filters, int x0_q4, | 
|  | int x_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve_avg_horiz(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *x_filters, int x0_q4, | 
|  | int x_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = ROUND_POWER_OF_TWO( | 
|  | dst[x] + clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), 1); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve_vert(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  |  | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve_avg_vert(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  |  | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = ROUND_POWER_OF_TWO( | 
|  | dst[y * dst_stride] + | 
|  | clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), | 
|  | 1); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const InterpKernel *const x_filters, | 
|  | int x0_q4, int x_step_q4, | 
|  | const InterpKernel *const y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h) { | 
|  | // Note: Fixed size intermediate buffer, temp, places limits on parameters. | 
|  | // 2d filtering proceeds in 2 steps: | 
|  | //   (1) Interpolate horizontally into an intermediate buffer, temp. | 
|  | //   (2) Interpolate temp vertically to derive the sub-pixel result. | 
|  | // Deriving the maximum number of rows in the temp buffer (135): | 
|  | // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative). | 
|  | // --Largest block size is 64x64 pixels. | 
|  | // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the | 
|  | //   original frame (in 1/16th pixel units). | 
|  | // --Must round-up because block may be located at sub-pixel position. | 
|  | // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. | 
|  | // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. | 
|  | uint8_t temp[MAX_EXT_SIZE * MAX_SB_SIZE]; | 
|  | int intermediate_height = | 
|  | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; | 
|  |  | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  |  | 
|  | assert(y_step_q4 <= 32); | 
|  | assert(x_step_q4 <= 32); | 
|  |  | 
|  | convolve_horiz(src - src_stride * (SUBPEL_TAPS / 2 - 1), src_stride, temp, | 
|  | MAX_SB_SIZE, x_filters, x0_q4, x_step_q4, w, | 
|  | intermediate_height); | 
|  | convolve_vert(temp + MAX_SB_SIZE * (SUBPEL_TAPS / 2 - 1), MAX_SB_SIZE, dst, | 
|  | dst_stride, y_filters, y0_q4, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | static const InterpKernel *get_filter_base(const int16_t *filter) { | 
|  | // NOTE: This assumes that the filter table is 256-byte aligned. | 
|  | // TODO(agrange) Modify to make independent of table alignment. | 
|  | return (const InterpKernel *)(((intptr_t)filter) & ~((intptr_t)0xFF)); | 
|  | } | 
|  |  | 
|  | static int get_filter_offset(const int16_t *f, const InterpKernel *base) { | 
|  | return (int)((const InterpKernel *)(intptr_t)f - base); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_horiz_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | convolve_horiz(src, src_stride, dst, dst_stride, filters_x, x0_q4, x_step_q4, | 
|  | w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | convolve_avg_horiz(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_vert_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | convolve_vert(src, src_stride, dst, dst_stride, filters_y, y0_q4, y_step_q4, | 
|  | w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | convolve_avg_vert(src, src_stride, dst, dst_stride, filters_y, y0_q4, | 
|  | y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int x_step_q4, const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | convolve(src, src_stride, dst, dst_stride, filters_x, x0_q4, x_step_q4, | 
|  | filters_y, y0_q4, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_avg_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int x_step_q4, const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | /* Fixed size intermediate buffer places limits on parameters. */ | 
|  | DECLARE_ALIGNED(16, uint8_t, temp[MAX_SB_SIZE * MAX_SB_SIZE]); | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  |  | 
|  | aom_convolve8_c(src, src_stride, temp, MAX_SB_SIZE, filter_x, x_step_q4, | 
|  | filter_y, y_step_q4, w, h); | 
|  | aom_convolve_avg_c(temp, MAX_SB_SIZE, dst, dst_stride, NULL, 0, NULL, 0, w, | 
|  | h); | 
|  | } | 
|  |  | 
|  | void aom_convolve_copy_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int filter_x_stride, const int16_t *filter_y, | 
|  | int filter_y_stride, int w, int h) { | 
|  | int r; | 
|  |  | 
|  | (void)filter_x; | 
|  | (void)filter_x_stride; | 
|  | (void)filter_y; | 
|  | (void)filter_y_stride; | 
|  |  | 
|  | for (r = h; r > 0; --r) { | 
|  | memcpy(dst, src, w); | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | void aom_convolve_avg_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int filter_x_stride, const int16_t *filter_y, | 
|  | int filter_y_stride, int w, int h) { | 
|  | int x, y; | 
|  |  | 
|  | (void)filter_x; | 
|  | (void)filter_x_stride; | 
|  | (void)filter_y; | 
|  | (void)filter_y_stride; | 
|  |  | 
|  | for (y = 0; y < h; ++y) { | 
|  | for (x = 0; x < w; ++x) dst[x] = ROUND_POWER_OF_TWO(dst[x] + src[x], 1); | 
|  |  | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | void aom_scaled_horiz_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int x_step_q4, const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | aom_convolve8_horiz_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, | 
|  | filter_y, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_scaled_vert_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int x_step_q4, const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | aom_convolve8_vert_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, | 
|  | filter_y, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_scaled_2d_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int x_step_q4, const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | aom_convolve8_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, | 
|  | filter_y, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_scaled_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | aom_convolve8_avg_horiz_c(src, src_stride, dst, dst_stride, filter_x, | 
|  | x_step_q4, filter_y, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_scaled_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | aom_convolve8_avg_vert_c(src, src_stride, dst, dst_stride, filter_x, | 
|  | x_step_q4, filter_y, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_scaled_avg_2d_c(const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, | 
|  | int x_step_q4, const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | aom_convolve8_avg_c(src, src_stride, dst, dst_stride, filter_x, x_step_q4, | 
|  | filter_y, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | #if CONFIG_LOOP_RESTORATION | 
|  | static void convolve_add_src_horiz(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *x_filters, int x0_q4, | 
|  | int x_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS) + | 
|  | src_x[SUBPEL_TAPS / 2 - 1]); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve_add_src_vert(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  |  | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const unsigned char *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = | 
|  | clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS) + | 
|  | src_y[(SUBPEL_TAPS / 2 - 1) * src_stride]); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve_add_src(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *const x_filters, int x0_q4, | 
|  | int x_step_q4, const InterpKernel *const y_filters, | 
|  | int y0_q4, int y_step_q4, int w, int h) { | 
|  | uint8_t temp[MAX_EXT_SIZE * MAX_SB_SIZE]; | 
|  | int intermediate_height = | 
|  | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; | 
|  |  | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  |  | 
|  | assert(y_step_q4 <= 32); | 
|  | assert(x_step_q4 <= 32); | 
|  |  | 
|  | convolve_add_src_horiz(src - src_stride * (SUBPEL_TAPS / 2 - 1), src_stride, | 
|  | temp, MAX_SB_SIZE, x_filters, x0_q4, x_step_q4, w, | 
|  | intermediate_height); | 
|  | convolve_add_src_vert(temp + MAX_SB_SIZE * (SUBPEL_TAPS / 2 - 1), MAX_SB_SIZE, | 
|  | dst, dst_stride, y_filters, y0_q4, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_add_src_horiz_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | convolve_add_src_horiz(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_add_src_vert_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | convolve_add_src_vert(src, src_stride, dst, dst_stride, filters_y, y0_q4, | 
|  | y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_add_src_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | convolve_add_src(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, filters_y, y0_q4, y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | static void convolve_add_src_horiz_hip(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint16_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *x_filters, int x0_q4, | 
|  | int x_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = ((int)src_x[SUBPEL_TAPS / 2 - 1] << FILTER_BITS); | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = | 
|  | (uint16_t)clamp(ROUND_POWER_OF_TWO(sum, FILTER_BITS - EXTRAPREC_BITS), | 
|  | 0, EXTRAPREC_CLAMP_LIMIT - 1); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve_add_src_vert_hip(const uint16_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h) { | 
|  | int x, y; | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  |  | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const uint16_t *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, | 
|  | sum = ((int)src_y[(SUBPEL_TAPS / 2 - 1) * src_stride] << FILTER_BITS); | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = | 
|  | clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS + EXTRAPREC_BITS)); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void convolve_add_src_hip(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *const x_filters, int x0_q4, | 
|  | int x_step_q4, | 
|  | const InterpKernel *const y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h) { | 
|  | uint16_t temp[MAX_EXT_SIZE * MAX_SB_SIZE]; | 
|  | int intermediate_height = | 
|  | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; | 
|  |  | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  |  | 
|  | assert(y_step_q4 <= 32); | 
|  | assert(x_step_q4 <= 32); | 
|  |  | 
|  | convolve_add_src_horiz_hip(src - src_stride * (SUBPEL_TAPS / 2 - 1), | 
|  | src_stride, temp, MAX_SB_SIZE, x_filters, x0_q4, | 
|  | x_step_q4, w, intermediate_height); | 
|  | convolve_add_src_vert_hip(temp + MAX_SB_SIZE * (SUBPEL_TAPS / 2 - 1), | 
|  | MAX_SB_SIZE, dst, dst_stride, y_filters, y0_q4, | 
|  | y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_add_src_horiz_hip_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint16_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | convolve_add_src_horiz_hip(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_add_src_vert_hip_c(const uint16_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | convolve_add_src_vert_hip(src, src_stride, dst, dst_stride, filters_y, y0_q4, | 
|  | y_step_q4, w, h); | 
|  | } | 
|  |  | 
|  | void aom_convolve8_add_src_hip_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | convolve_add_src_hip(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, filters_y, y0_q4, y_step_q4, w, h); | 
|  | } | 
|  | #endif  // CONFIG_LOOP_RESTORATION | 
|  |  | 
|  | #if CONFIG_HIGHBITDEPTH | 
|  | static void highbd_convolve_horiz(const uint8_t *src8, ptrdiff_t src_stride, | 
|  | uint8_t *dst8, ptrdiff_t dst_stride, | 
|  | const InterpKernel *x_filters, int x0_q4, | 
|  | int x_step_q4, int w, int h, int bd) { | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_avg_horiz(const uint8_t *src8, ptrdiff_t src_stride, | 
|  | uint8_t *dst8, ptrdiff_t dst_stride, | 
|  | const InterpKernel *x_filters, int x0_q4, | 
|  | int x_step_q4, int w, int h, int bd) { | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = ROUND_POWER_OF_TWO( | 
|  | dst[x] + clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd), | 
|  | 1); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_vert(const uint8_t *src8, ptrdiff_t src_stride, | 
|  | uint8_t *dst8, ptrdiff_t dst_stride, | 
|  | const InterpKernel *y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h, int bd) { | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const uint16_t *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = | 
|  | clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_avg_vert(const uint8_t *src8, ptrdiff_t src_stride, | 
|  | uint8_t *dst8, ptrdiff_t dst_stride, | 
|  | const InterpKernel *y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h, int bd) { | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const uint16_t *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = ROUND_POWER_OF_TWO( | 
|  | dst[y * dst_stride] + | 
|  | clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd), | 
|  | 1); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *const x_filters, int x0_q4, | 
|  | int x_step_q4, const InterpKernel *const y_filters, | 
|  | int y0_q4, int y_step_q4, int w, int h, int bd) { | 
|  | // Note: Fixed size intermediate buffer, temp, places limits on parameters. | 
|  | // 2d filtering proceeds in 2 steps: | 
|  | //   (1) Interpolate horizontally into an intermediate buffer, temp. | 
|  | //   (2) Interpolate temp vertically to derive the sub-pixel result. | 
|  | // Deriving the maximum number of rows in the temp buffer (135): | 
|  | // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative). | 
|  | // --Largest block size is 64x64 pixels. | 
|  | // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the | 
|  | //   original frame (in 1/16th pixel units). | 
|  | // --Must round-up because block may be located at sub-pixel position. | 
|  | // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. | 
|  | // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. | 
|  | uint16_t temp[MAX_EXT_SIZE * MAX_SB_SIZE]; | 
|  | int intermediate_height = | 
|  | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; | 
|  |  | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  | assert(y_step_q4 <= 32); | 
|  | assert(x_step_q4 <= 32); | 
|  |  | 
|  | highbd_convolve_horiz(src - src_stride * (SUBPEL_TAPS / 2 - 1), src_stride, | 
|  | CONVERT_TO_BYTEPTR(temp), MAX_SB_SIZE, x_filters, x0_q4, | 
|  | x_step_q4, w, intermediate_height, bd); | 
|  | highbd_convolve_vert( | 
|  | CONVERT_TO_BYTEPTR(temp) + MAX_SB_SIZE * (SUBPEL_TAPS / 2 - 1), | 
|  | MAX_SB_SIZE, dst, dst_stride, y_filters, y0_q4, y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_horiz_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h, int bd) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | highbd_convolve_horiz(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_avg_horiz_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h, int bd) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | highbd_convolve_avg_horiz(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_vert_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h, int bd) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | highbd_convolve_vert(src, src_stride, dst, dst_stride, filters_y, y0_q4, | 
|  | y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_avg_vert_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h, int bd) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | highbd_convolve_avg_vert(src, src_stride, dst, dst_stride, filters_y, y0_q4, | 
|  | y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h, int bd) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | highbd_convolve(src, src_stride, dst, dst_stride, filters_x, x0_q4, x_step_q4, | 
|  | filters_y, y0_q4, y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_avg_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, | 
|  | int h, int bd) { | 
|  | // Fixed size intermediate buffer places limits on parameters. | 
|  | DECLARE_ALIGNED(16, uint16_t, temp[MAX_SB_SIZE * MAX_SB_SIZE]); | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  |  | 
|  | aom_highbd_convolve8_c(src, src_stride, CONVERT_TO_BYTEPTR(temp), MAX_SB_SIZE, | 
|  | filter_x, x_step_q4, filter_y, y_step_q4, w, h, bd); | 
|  | aom_highbd_convolve_avg_c(CONVERT_TO_BYTEPTR(temp), MAX_SB_SIZE, dst, | 
|  | dst_stride, NULL, 0, NULL, 0, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve_copy_c(const uint8_t *src8, ptrdiff_t src_stride, | 
|  | uint8_t *dst8, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int filter_x_stride, | 
|  | const int16_t *filter_y, int filter_y_stride, | 
|  | int w, int h, int bd) { | 
|  | int r; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | (void)filter_x; | 
|  | (void)filter_y; | 
|  | (void)filter_x_stride; | 
|  | (void)filter_y_stride; | 
|  | (void)bd; | 
|  |  | 
|  | for (r = h; r > 0; --r) { | 
|  | memcpy(dst, src, w * sizeof(uint16_t)); | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve_avg_c(const uint8_t *src8, ptrdiff_t src_stride, | 
|  | uint8_t *dst8, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int filter_x_stride, | 
|  | const int16_t *filter_y, int filter_y_stride, | 
|  | int w, int h, int bd) { | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | (void)filter_x; | 
|  | (void)filter_y; | 
|  | (void)filter_x_stride; | 
|  | (void)filter_y_stride; | 
|  | (void)bd; | 
|  |  | 
|  | for (y = 0; y < h; ++y) { | 
|  | for (x = 0; x < w; ++x) { | 
|  | dst[x] = ROUND_POWER_OF_TWO(dst[x] + src[x], 1); | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | #if CONFIG_LOOP_RESTORATION | 
|  | static void highbd_convolve_add_src_horiz(const uint8_t *src8, | 
|  | ptrdiff_t src_stride, uint8_t *dst8, | 
|  | ptrdiff_t dst_stride, | 
|  | const InterpKernel *x_filters, | 
|  | int x0_q4, int x_step_q4, int w, | 
|  | int h, int bd) { | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = clip_pixel_highbd( | 
|  | ROUND_POWER_OF_TWO(sum, FILTER_BITS) + src_x[SUBPEL_TAPS / 2 - 1], | 
|  | bd); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_add_src_vert(const uint8_t *src8, | 
|  | ptrdiff_t src_stride, uint8_t *dst8, | 
|  | ptrdiff_t dst_stride, | 
|  | const InterpKernel *y_filters, | 
|  | int y0_q4, int y_step_q4, int w, int h, | 
|  | int bd) { | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const uint16_t *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, sum = 0; | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = | 
|  | clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS) + | 
|  | src_y[(SUBPEL_TAPS / 2 - 1) * src_stride], | 
|  | bd); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_add_src(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const InterpKernel *const x_filters, | 
|  | int x0_q4, int x_step_q4, | 
|  | const InterpKernel *const y_filters, | 
|  | int y0_q4, int y_step_q4, int w, int h, | 
|  | int bd) { | 
|  | // Note: Fixed size intermediate buffer, temp, places limits on parameters. | 
|  | // 2d filtering proceeds in 2 steps: | 
|  | //   (1) Interpolate horizontally into an intermediate buffer, temp. | 
|  | //   (2) Interpolate temp vertically to derive the sub-pixel result. | 
|  | // Deriving the maximum number of rows in the temp buffer (135): | 
|  | // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative). | 
|  | // --Largest block size is 64x64 pixels. | 
|  | // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the | 
|  | //   original frame (in 1/16th pixel units). | 
|  | // --Must round-up because block may be located at sub-pixel position. | 
|  | // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. | 
|  | // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. | 
|  | uint16_t temp[MAX_EXT_SIZE * MAX_SB_SIZE]; | 
|  | int intermediate_height = | 
|  | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; | 
|  |  | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  | assert(y_step_q4 <= 32); | 
|  | assert(x_step_q4 <= 32); | 
|  |  | 
|  | highbd_convolve_add_src_horiz(src - src_stride * (SUBPEL_TAPS / 2 - 1), | 
|  | src_stride, CONVERT_TO_BYTEPTR(temp), | 
|  | MAX_SB_SIZE, x_filters, x0_q4, x_step_q4, w, | 
|  | intermediate_height, bd); | 
|  | highbd_convolve_add_src_vert( | 
|  | CONVERT_TO_BYTEPTR(temp) + MAX_SB_SIZE * (SUBPEL_TAPS / 2 - 1), | 
|  | MAX_SB_SIZE, dst, dst_stride, y_filters, y0_q4, y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_add_src_horiz_c( | 
|  | const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, int h, int bd) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | highbd_convolve_add_src_horiz(src, src_stride, dst, dst_stride, filters_x, | 
|  | x0_q4, x_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_add_src_vert_c(const uint8_t *src, | 
|  | ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h, int bd) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | highbd_convolve_add_src_vert(src, src_stride, dst, dst_stride, filters_y, | 
|  | y0_q4, y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_add_src_c(const uint8_t *src, ptrdiff_t src_stride, | 
|  | uint8_t *dst, ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h, int bd) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | highbd_convolve_add_src(src, src_stride, dst, dst_stride, filters_x, x0_q4, | 
|  | x_step_q4, filters_y, y0_q4, y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_add_src_horiz_hip( | 
|  | const uint8_t *src8, ptrdiff_t src_stride, uint16_t *dst, | 
|  | ptrdiff_t dst_stride, const InterpKernel *x_filters, int x0_q4, | 
|  | int x_step_q4, int w, int h, int bd) { | 
|  | const int extraprec_clamp_limit = (EXTRAPREC_CLAMP_LIMIT << (bd - 8)); | 
|  | int x, y; | 
|  | uint16_t *src = CONVERT_TO_SHORTPTR(src8); | 
|  | src -= SUBPEL_TAPS / 2 - 1; | 
|  | for (y = 0; y < h; ++y) { | 
|  | int x_q4 = x0_q4; | 
|  | for (x = 0; x < w; ++x) { | 
|  | const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS]; | 
|  | const int16_t *const x_filter = x_filters[x_q4 & SUBPEL_MASK]; | 
|  | int k, sum = ((int)src_x[SUBPEL_TAPS / 2 - 1] << FILTER_BITS); | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) sum += src_x[k] * x_filter[k]; | 
|  | dst[x] = | 
|  | (uint16_t)clamp(ROUND_POWER_OF_TWO(sum, FILTER_BITS - EXTRAPREC_BITS), | 
|  | 0, extraprec_clamp_limit - 1); | 
|  | x_q4 += x_step_q4; | 
|  | } | 
|  | src += src_stride; | 
|  | dst += dst_stride; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_add_src_vert_hip( | 
|  | const uint16_t *src, ptrdiff_t src_stride, uint8_t *dst8, | 
|  | ptrdiff_t dst_stride, const InterpKernel *y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h, int bd) { | 
|  | int x, y; | 
|  | uint16_t *dst = CONVERT_TO_SHORTPTR(dst8); | 
|  | src -= src_stride * (SUBPEL_TAPS / 2 - 1); | 
|  | for (x = 0; x < w; ++x) { | 
|  | int y_q4 = y0_q4; | 
|  | for (y = 0; y < h; ++y) { | 
|  | const uint16_t *src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride]; | 
|  | const int16_t *const y_filter = y_filters[y_q4 & SUBPEL_MASK]; | 
|  | int k, | 
|  | sum = ((int)src_y[(SUBPEL_TAPS / 2 - 1) * src_stride] << FILTER_BITS); | 
|  | for (k = 0; k < SUBPEL_TAPS; ++k) | 
|  | sum += src_y[k * src_stride] * y_filter[k]; | 
|  | dst[y * dst_stride] = clip_pixel_highbd( | 
|  | ROUND_POWER_OF_TWO(sum, FILTER_BITS + EXTRAPREC_BITS), bd); | 
|  | y_q4 += y_step_q4; | 
|  | } | 
|  | ++src; | 
|  | ++dst; | 
|  | } | 
|  | } | 
|  |  | 
|  | static void highbd_convolve_add_src_hip( | 
|  | const uint8_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const InterpKernel *const x_filters, int x0_q4, | 
|  | int x_step_q4, const InterpKernel *const y_filters, int y0_q4, | 
|  | int y_step_q4, int w, int h, int bd) { | 
|  | // Note: Fixed size intermediate buffer, temp, places limits on parameters. | 
|  | // 2d filtering proceeds in 2 steps: | 
|  | //   (1) Interpolate horizontally into an intermediate buffer, temp. | 
|  | //   (2) Interpolate temp vertically to derive the sub-pixel result. | 
|  | // Deriving the maximum number of rows in the temp buffer (135): | 
|  | // --Smallest scaling factor is x1/2 ==> y_step_q4 = 32 (Normative). | 
|  | // --Largest block size is 64x64 pixels. | 
|  | // --64 rows in the downscaled frame span a distance of (64 - 1) * 32 in the | 
|  | //   original frame (in 1/16th pixel units). | 
|  | // --Must round-up because block may be located at sub-pixel position. | 
|  | // --Require an additional SUBPEL_TAPS rows for the 8-tap filter tails. | 
|  | // --((64 - 1) * 32 + 15) >> 4 + 8 = 135. | 
|  | uint16_t temp[MAX_EXT_SIZE * MAX_SB_SIZE]; | 
|  | int intermediate_height = | 
|  | (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; | 
|  |  | 
|  | assert(w <= MAX_SB_SIZE); | 
|  | assert(h <= MAX_SB_SIZE); | 
|  | assert(y_step_q4 <= 32); | 
|  | assert(x_step_q4 <= 32); | 
|  |  | 
|  | highbd_convolve_add_src_horiz_hip( | 
|  | src - src_stride * (SUBPEL_TAPS / 2 - 1), src_stride, temp, MAX_SB_SIZE, | 
|  | x_filters, x0_q4, x_step_q4, w, intermediate_height, bd); | 
|  | highbd_convolve_add_src_vert_hip(temp + MAX_SB_SIZE * (SUBPEL_TAPS / 2 - 1), | 
|  | MAX_SB_SIZE, dst, dst_stride, y_filters, | 
|  | y0_q4, y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_add_src_horiz_hip_c( | 
|  | const uint8_t *src, ptrdiff_t src_stride, uint16_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, int h, int bd) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  | (void)filter_y; | 
|  | (void)y_step_q4; | 
|  |  | 
|  | highbd_convolve_add_src_horiz_hip(src, src_stride, dst, dst_stride, filters_x, | 
|  | x0_q4, x_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_add_src_vert_hip_c( | 
|  | const uint16_t *src, ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, int w, int h, int bd) { | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  | (void)filter_x; | 
|  | (void)x_step_q4; | 
|  |  | 
|  | highbd_convolve_add_src_vert_hip(src, src_stride, dst, dst_stride, filters_y, | 
|  | y0_q4, y_step_q4, w, h, bd); | 
|  | } | 
|  |  | 
|  | void aom_highbd_convolve8_add_src_hip_c(const uint8_t *src, | 
|  | ptrdiff_t src_stride, uint8_t *dst, | 
|  | ptrdiff_t dst_stride, | 
|  | const int16_t *filter_x, int x_step_q4, | 
|  | const int16_t *filter_y, int y_step_q4, | 
|  | int w, int h, int bd) { | 
|  | const InterpKernel *const filters_x = get_filter_base(filter_x); | 
|  | const int x0_q4 = get_filter_offset(filter_x, filters_x); | 
|  |  | 
|  | const InterpKernel *const filters_y = get_filter_base(filter_y); | 
|  | const int y0_q4 = get_filter_offset(filter_y, filters_y); | 
|  |  | 
|  | highbd_convolve_add_src_hip(src, src_stride, dst, dst_stride, filters_x, | 
|  | x0_q4, x_step_q4, filters_y, y0_q4, y_step_q4, w, | 
|  | h, bd); | 
|  | } | 
|  |  | 
|  | #endif  // CONFIG_LOOP_RESTORATION | 
|  | #endif  // CONFIG_HIGHBITDEPTH |