| /* |
| * Copyright (c) 2018, 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 <stdlib.h> |
| #include <math.h> |
| |
| #include "config/av1_rtcd.h" |
| #include "av1/encoder/dwt.h" |
| |
| // Note: block length must be even for this implementation |
| static void analysis_53_row(int length, tran_low_t *x, tran_low_t *lowpass, |
| tran_low_t *highpass) { |
| int n; |
| tran_low_t r, *a, *b; |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| while (--n) { |
| *a++ = (r = *x++) * 2; |
| *b++ = *x - ((r + x[1] + 1) >> 1); |
| x++; |
| } |
| *a = (r = *x++) * 2; |
| *b = *x - r; |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| r = *highpass; |
| while (n--) { |
| *a++ += (r + (*b) + 1) >> 1; |
| r = *b++; |
| } |
| } |
| |
| static void analysis_53_col(int length, tran_low_t *x, tran_low_t *lowpass, |
| tran_low_t *highpass) { |
| int n; |
| tran_low_t r, *a, *b; |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| while (--n) { |
| *a++ = (r = *x++); |
| *b++ = (((*x) * 2) - (r + x[1]) + 2) >> 2; |
| x++; |
| } |
| *a = (r = *x++); |
| *b = (*x - r + 1) >> 1; |
| |
| n = length >> 1; |
| b = highpass; |
| a = lowpass; |
| r = *highpass; |
| while (n--) { |
| *a++ += (r + (*b) + 1) >> 1; |
| r = *b++; |
| } |
| } |
| |
| static void dyadic_analyze_53_uint8_input(int levels, int width, int height, |
| const uint8_t *x, int pitch_x, |
| tran_low_t *c, int pitch_c, |
| int dwt_scale_bits, int hbd) { |
| int lv, i, j, nh, nw, hh = height, hw = width; |
| tran_low_t buffer[2 * DWT_MAX_LENGTH]; |
| |
| if (hbd) { |
| const uint16_t *x16 = CONVERT_TO_SHORTPTR(x); |
| for (i = 0; i < height; i++) { |
| for (j = 0; j < width; j++) { |
| c[i * pitch_c + j] = x16[i * pitch_x + j] << dwt_scale_bits; |
| } |
| } |
| } else { |
| for (i = 0; i < height; i++) { |
| for (j = 0; j < width; j++) { |
| c[i * pitch_c + j] = x[i * pitch_x + j] << dwt_scale_bits; |
| } |
| } |
| } |
| |
| for (lv = 0; lv < levels; lv++) { |
| nh = hh; |
| hh = (hh + 1) >> 1; |
| nw = hw; |
| hw = (hw + 1) >> 1; |
| if ((nh < 2) || (nw < 2)) return; |
| for (i = 0; i < nh; i++) { |
| memcpy(buffer, &c[i * pitch_c], nw * sizeof(tran_low_t)); |
| analysis_53_row(nw, buffer, &c[i * pitch_c], &c[i * pitch_c] + hw); |
| } |
| for (j = 0; j < nw; j++) { |
| for (i = 0; i < nh; i++) buffer[i + nh] = c[i * pitch_c + j]; |
| analysis_53_col(nh, buffer + nh, buffer, buffer + hh); |
| for (i = 0; i < nh; i++) c[i * pitch_c + j] = buffer[i]; |
| } |
| } |
| } |
| |
| void av1_fdwt8x8_uint8_input_c(const uint8_t *input, tran_low_t *output, |
| int stride, int hbd) { |
| dyadic_analyze_53_uint8_input(4, 8, 8, input, stride, output, 8, 2, hbd); |
| } |
| |
| static int haar_ac_sad(const tran_low_t *output, int bw, int bh, int stride) { |
| int acsad = 0; |
| |
| for (int r = 0; r < bh; ++r) |
| for (int c = 0; c < bw; ++c) { |
| if (r >= bh / 2 || c >= bw / 2) acsad += abs(output[r * stride + c]); |
| } |
| return acsad; |
| } |
| |
| static int haar_ac_sad_8x8_uint8_input(const uint8_t *input, int stride, |
| int hbd) { |
| tran_low_t output[64]; |
| |
| av1_fdwt8x8_uint8_input_c(input, output, stride, hbd); |
| return haar_ac_sad(output, 8, 8, 8); |
| } |
| |
| int64_t av1_haar_ac_sad_mxn_uint8_input(const uint8_t *input, int stride, |
| int hbd, int num_8x8_rows, |
| int num_8x8_cols) { |
| int64_t wavelet_energy = 0; |
| for (int r8 = 0; r8 < num_8x8_rows; ++r8) { |
| for (int c8 = 0; c8 < num_8x8_cols; ++c8) { |
| wavelet_energy += haar_ac_sad_8x8_uint8_input( |
| input + c8 * 8 + r8 * 8 * stride, stride, hbd); |
| } |
| } |
| return wavelet_energy; |
| } |