292 строки
11 KiB
C
292 строки
11 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include <assert.h>
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#include <string.h>
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#include "av1/common/filter.h"
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#include "av1/common/enums.h"
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#include "aom_dsp/aom_dsp_common.h"
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#include "aom_ports/mem.h"
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#define MAX_BLOCK_WIDTH (MAX_SB_SIZE)
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#define MAX_BLOCK_HEIGHT (MAX_SB_SIZE)
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#define MAX_STEP (32)
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#define MAX_FILTER_TAP (12)
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static void convolve_horiz(const uint8_t *src, int src_stride, uint8_t *dst,
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int dst_stride, int w, int h,
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const InterpFilterParams filter_params,
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const int subpel_x_q4, int x_step_q4, int avg) {
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int x, y;
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int filter_size = filter_params.taps;
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src -= filter_size / 2 - 1;
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for (y = 0; y < h; ++y) {
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int x_q4 = subpel_x_q4;
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for (x = 0; x < w; ++x) {
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const uint8_t *const src_x = &src[x_q4 >> SUBPEL_BITS];
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const int16_t *x_filter =
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get_interp_filter_subpel_kernel(filter_params, x_q4 & SUBPEL_MASK);
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int k, sum = 0;
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for (k = 0; k < filter_size; ++k) sum += src_x[k] * x_filter[k];
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if (avg) {
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dst[x] = ROUND_POWER_OF_TWO(
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dst[x] + clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)), 1);
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} else {
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dst[x] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
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}
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x_q4 += x_step_q4;
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}
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src += src_stride;
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dst += dst_stride;
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}
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}
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static void convolve_vert(const uint8_t *src, int src_stride, uint8_t *dst,
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int dst_stride, int w, int h,
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const InterpFilterParams filter_params,
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const int subpel_y_q4, int y_step_q4, int avg) {
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int x, y;
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int filter_size = filter_params.taps;
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src -= src_stride * (filter_size / 2 - 1);
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for (x = 0; x < w; ++x) {
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int y_q4 = subpel_y_q4;
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for (y = 0; y < h; ++y) {
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const uint8_t *const src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride];
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const int16_t *y_filter =
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get_interp_filter_subpel_kernel(filter_params, y_q4 & SUBPEL_MASK);
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int k, sum = 0;
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for (k = 0; k < filter_size; ++k)
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sum += src_y[k * src_stride] * y_filter[k];
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if (avg) {
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dst[y * dst_stride] = ROUND_POWER_OF_TWO(
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dst[y * dst_stride] +
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clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)),
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1);
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} else {
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dst[y * dst_stride] = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS));
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}
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y_q4 += y_step_q4;
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}
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++src;
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++dst;
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}
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}
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static void convolve_copy(const uint8_t *src, int src_stride, uint8_t *dst,
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int dst_stride, int w, int h, int avg) {
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if (avg == 0) {
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int r;
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for (r = 0; r < h; ++r) {
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memcpy(dst, src, w);
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src += src_stride;
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dst += dst_stride;
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}
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} else {
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int r, c;
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for (r = 0; r < h; ++r) {
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for (c = 0; c < w; ++c) {
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dst[c] = clip_pixel(ROUND_POWER_OF_TWO(dst[c] + src[c], 1));
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}
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src += src_stride;
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dst += dst_stride;
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}
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}
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}
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void av1_convolve(const uint8_t *src, int src_stride, uint8_t *dst,
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int dst_stride, int w, int h,
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const InterpFilter *interp_filter, const int subpel_x_q4,
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int x_step_q4, const int subpel_y_q4, int y_step_q4,
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int ref_idx) {
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int ignore_horiz = x_step_q4 == 16 && subpel_x_q4 == 0;
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int ignore_vert = y_step_q4 == 16 && subpel_y_q4 == 0;
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assert(w <= MAX_BLOCK_WIDTH);
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assert(h <= MAX_BLOCK_HEIGHT);
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assert(y_step_q4 <= MAX_STEP);
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assert(x_step_q4 <= MAX_STEP);
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if (ignore_horiz && ignore_vert) {
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convolve_copy(src, src_stride, dst, dst_stride, w, h, ref_idx);
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} else if (ignore_vert) {
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InterpFilterParams filter_params = get_interp_filter_params(*interp_filter);
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assert(filter_params.taps <= MAX_FILTER_TAP);
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convolve_horiz(src, src_stride, dst, dst_stride, w, h, filter_params,
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subpel_x_q4, x_step_q4, ref_idx);
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} else if (ignore_horiz) {
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InterpFilterParams filter_params = get_interp_filter_params(*interp_filter);
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assert(filter_params.taps <= MAX_FILTER_TAP);
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convolve_vert(src, src_stride, dst, dst_stride, w, h, filter_params,
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subpel_y_q4, y_step_q4, ref_idx);
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} else {
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// temp's size is set to (maximum possible intermediate_height) *
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// MAX_BLOCK_WIDTH
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uint8_t temp[((((MAX_BLOCK_HEIGHT - 1) * MAX_STEP + 15) >> SUBPEL_BITS) +
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MAX_FILTER_TAP) *
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MAX_BLOCK_WIDTH];
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int temp_stride = MAX_BLOCK_WIDTH;
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InterpFilterParams filter_params = get_interp_filter_params(*interp_filter);
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int filter_size = filter_params.taps;
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int intermediate_height =
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(((h - 1) * y_step_q4 + subpel_y_q4) >> SUBPEL_BITS) + filter_size;
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assert(filter_size <= MAX_FILTER_TAP);
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convolve_horiz(src - src_stride * (filter_size / 2 - 1), src_stride, temp,
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temp_stride, w, intermediate_height, filter_params,
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subpel_x_q4, x_step_q4, 0);
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convolve_vert(temp + temp_stride * (filter_size / 2 - 1), temp_stride, dst,
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dst_stride, w, h, filter_params, subpel_y_q4, y_step_q4,
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ref_idx);
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}
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}
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#if CONFIG_AOM_HIGHBITDEPTH
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static void highbd_convolve_horiz(const uint16_t *src, int src_stride,
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uint16_t *dst, int dst_stride, int w, int h,
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const InterpFilterParams filter_params,
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const int subpel_x_q4, int x_step_q4, int avg,
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int bd) {
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int x, y;
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int filter_size = filter_params.taps;
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src -= filter_size / 2 - 1;
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for (y = 0; y < h; ++y) {
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int x_q4 = subpel_x_q4;
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for (x = 0; x < w; ++x) {
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const uint16_t *const src_x = &src[x_q4 >> SUBPEL_BITS];
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const int16_t *x_filter =
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get_interp_filter_subpel_kernel(filter_params, x_q4 & SUBPEL_MASK);
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int k, sum = 0;
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for (k = 0; k < filter_size; ++k) sum += src_x[k] * x_filter[k];
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if (avg)
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dst[x] = ROUND_POWER_OF_TWO(
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dst[x] +
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clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd),
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1);
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else
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dst[x] = clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
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x_q4 += x_step_q4;
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}
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src += src_stride;
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dst += dst_stride;
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}
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}
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static void highbd_convolve_vert(const uint16_t *src, int src_stride,
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uint16_t *dst, int dst_stride, int w, int h,
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const InterpFilterParams filter_params,
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const int subpel_y_q4, int y_step_q4, int avg,
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int bd) {
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int x, y;
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int filter_size = filter_params.taps;
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src -= src_stride * (filter_size / 2 - 1);
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for (x = 0; x < w; ++x) {
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int y_q4 = subpel_y_q4;
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for (y = 0; y < h; ++y) {
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const uint16_t *const src_y = &src[(y_q4 >> SUBPEL_BITS) * src_stride];
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const int16_t *y_filter =
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get_interp_filter_subpel_kernel(filter_params, y_q4 & SUBPEL_MASK);
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int k, sum = 0;
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for (k = 0; k < filter_size; ++k)
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sum += src_y[k * src_stride] * y_filter[k];
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if (avg) {
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dst[y * dst_stride] = ROUND_POWER_OF_TWO(
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dst[y * dst_stride] +
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clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd),
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1);
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} else {
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dst[y * dst_stride] =
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clip_pixel_highbd(ROUND_POWER_OF_TWO(sum, FILTER_BITS), bd);
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}
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y_q4 += y_step_q4;
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}
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++src;
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++dst;
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}
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}
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static void highbd_convolve_copy(const uint16_t *src, int src_stride,
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uint16_t *dst, int dst_stride, int w, int h,
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int avg, int bd) {
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if (avg == 0) {
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int r;
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for (r = 0; r < h; ++r) {
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memcpy(dst, src, w * sizeof(*src));
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src += src_stride;
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dst += dst_stride;
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}
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} else {
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int r, c;
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for (r = 0; r < h; ++r) {
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for (c = 0; c < w; ++c) {
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dst[c] = clip_pixel_highbd(ROUND_POWER_OF_TWO(dst[c] + src[c], 1), bd);
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}
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src += src_stride;
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dst += dst_stride;
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}
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}
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}
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void av1_highbd_convolve(const uint8_t *src8, int src_stride, uint8_t *dst8,
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int dst_stride, int w, int h,
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const InterpFilter *interp_filter,
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const int subpel_x_q4, int x_step_q4,
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const int subpel_y_q4, int y_step_q4, int ref_idx,
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int bd) {
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uint16_t *src = CONVERT_TO_SHORTPTR(src8);
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uint16_t *dst = CONVERT_TO_SHORTPTR(dst8);
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int ignore_horiz = x_step_q4 == 16 && subpel_x_q4 == 0;
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int ignore_vert = y_step_q4 == 16 && subpel_y_q4 == 0;
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assert(w <= MAX_BLOCK_WIDTH);
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assert(h <= MAX_BLOCK_HEIGHT);
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assert(y_step_q4 <= MAX_STEP);
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assert(x_step_q4 <= MAX_STEP);
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if (ignore_horiz && ignore_vert) {
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highbd_convolve_copy(src, src_stride, dst, dst_stride, w, h, ref_idx, bd);
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} else if (ignore_vert) {
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InterpFilterParams filter_params = get_interp_filter_params(*interp_filter);
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highbd_convolve_horiz(src, src_stride, dst, dst_stride, w, h, filter_params,
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subpel_x_q4, x_step_q4, ref_idx, bd);
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} else if (ignore_horiz) {
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InterpFilterParams filter_params = get_interp_filter_params(*interp_filter);
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highbd_convolve_vert(src, src_stride, dst, dst_stride, w, h, filter_params,
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subpel_y_q4, y_step_q4, ref_idx, bd);
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} else {
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// temp's size is set to (maximum possible intermediate_height) *
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// MAX_BLOCK_WIDTH
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uint16_t temp[((((MAX_BLOCK_HEIGHT - 1) * MAX_STEP + 15) >> SUBPEL_BITS) +
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MAX_FILTER_TAP) *
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MAX_BLOCK_WIDTH];
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int temp_stride = MAX_BLOCK_WIDTH;
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InterpFilterParams filter_params = get_interp_filter_params(*interp_filter);
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int filter_size = filter_params.taps;
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int intermediate_height =
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(((h - 1) * y_step_q4 + subpel_y_q4) >> SUBPEL_BITS) + filter_size;
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assert(filter_size <= MAX_FILTER_TAP);
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highbd_convolve_horiz(src - src_stride * (filter_size / 2 - 1), src_stride,
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temp, temp_stride, w, intermediate_height,
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filter_params, subpel_x_q4, x_step_q4, 0, bd);
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highbd_convolve_vert(temp + temp_stride * (filter_size / 2 - 1),
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temp_stride, dst, dst_stride, w, h, filter_params,
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subpel_y_q4, y_step_q4, ref_idx, bd);
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}
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}
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#endif // CONFIG_AOM_HIGHBITDEPTH
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