/* *  Copyright (c) 2016 The WebM project authors. All Rights Reserved. * *  Use of this source code is governed by a BSD-style license *  that can be found in the LICENSE file in the root of the source *  tree. An additional intellectual property rights grant can be found *  in the file PATENTS.  All contributing project authors may *  be found in the AUTHORS file in the root of the source tree. */#include <assert.h>#include <stdlib.h>#include "./vpx_dsp_rtcd.h"#include "vpx/vpx_integer.h" const int16_t vpx_rv[] = {  8,  5,  2,  2,  8,  12, 4,  9,  8,  3,  0,  3,  9,  0,  0,  0,  8,  3,  14,  4,  10, 1,  11, 14, 1,  14, 9,  6,  12, 11, 8,  6,  10, 0,  0,  8,  9,  0,  3,  14, 8,  11, 13, 4,  2,  9,  0,  3,  9,  6,  1,  2,  3,  14, 13, 1,  8,  2,  9,  7,  3,  3,  1,  13, 13, 6,  6,  5,  2,  7,  11, 9,  11, 8,  7,  3,  2,  0,  13, 13, 14, 4,  12, 5,  12, 10, 8,  10, 13, 10, 4,  14, 4,  10, 0,  8,  11, 1,  13, 7,  7,  14, 6,  14, 13, 2,  13, 5,  4,  4,  0,  10, 0,  5,  13, 2,  12, 7,  11, 13, 8,  0,  4,  10, 7,  2,  7,  2,  2,  5,  3,  4,  7,  3,  3,  14, 14, 5,  9,  13, 3,  14, 3,  6,  3,  0,  11, 8,  13, 1,  13, 1,  12, 0,  10, 9,  7,  6,  2,  8,  5,  2,  13, 7,  1,  13, 14, 7,  6,  7,  9,  6,  10, 11, 7,  8,  7,  5,  14, 8,  4,  4,  0,  8,  7,  10, 0,  8,  14, 11,  3,  12, 5,  7,  14, 3,  14, 5,  2,  6,  11, 12, 12, 8,  0,  11, 13, 1,  2,  0,  5,  10, 14, 7,  8,  0,  4,  11, 0,  8,  0,  3,  10, 5,  8,  0,  11, 6,  7,  8,  10, 7,  13, 9,  2,  5,  1,  5,  10, 2,  4,  3,  5,  6,  10, 8,  9,  4,  11, 14, 0,  10, 0,  5,  13, 2,  12, 7,  11, 13, 8,  0,  4,  10, 7,  2,  7,  2,  2,  5,  3,  4,  7,  3,  3,  14, 14, 5,  9,  13, 3,  14, 3,  6,  3,  0,  11, 8,  13, 1,  13, 1,  12, 0,  10, 9,  7,  6,  2,  8,  5,  2,  13, 7,  1,  13, 14, 7,  6,  7,  9,  6,  10, 11, 7,  8,  7,  5,  14, 8,  4,  4,  0,  8,  7,  10, 0,  8,  14, 11, 3,  12, 5,  7,  14, 3,  14, 5,  2,  6,  11, 12,  12, 8,  0,  11, 13, 1,  2,  0,  5,  10, 14, 7,  8,  0,  4,  11, 0,  8,  0,  3,  10, 5,  8,  0,  11, 6,  7,  8,  10, 7,  13, 9,  2,  5,  1,  5,  10, 2,  4,  3,  5,  6,  10, 8,  9,  4,  11, 14, 3,  8,  3,  7,  8,  5,  11, 4,  12,  3,  11, 9,  14, 8,  14, 13, 4,  3,  1,  2,  14, 6,  5,  4,  4,  11, 4,  6,  2,  1,  5,  8,  8,  12, 13, 5,  14, 10, 12, 13, 0,  9,  5,  5,  11, 10, 13,  9,  10, 13,}; void vpx_post_proc_down_and_across_mb_row_c(unsigned char *src,                                            unsigned char *dst, int src_pitch,                                            int dst_pitch, int cols,                                            unsigned char *flimits, int size) {  unsigned char *p_src, *p_dst;  int row;  int col;  unsigned char v;  unsigned char d[4];   assert(size >= 8);  assert(cols >= 8);   for (row = 0; row < size; row++) {    /* post_proc_down for one row */    p_src = src;    p_dst = dst;     for (col = 0; col < cols; col++) {      unsigned char p_above2 = p_src[col - 2 * src_pitch];      unsigned char p_above1 = p_src[col - src_pitch];      unsigned char p_below1 = p_src[col + src_pitch];      unsigned char p_below2 = p_src[col + 2 * src_pitch];       v = p_src[col];       if ((abs(v - p_above2) < flimits[col]) &&          (abs(v - p_above1) < flimits[col]) &&          (abs(v - p_below1) < flimits[col]) &&          (abs(v - p_below2) < flimits[col])) {        unsigned char k1, k2, k3;        k1 = (p_above2 + p_above1 + 1) >> 1;        k2 = (p_below2 + p_below1 + 1) >> 1;        k3 = (k1 + k2 + 1) >> 1;        v = (k3 + v + 1) >> 1;      }       p_dst[col] = v;    }     /* now post_proc_across */    p_src = dst;    p_dst = dst;     p_src[-2] = p_src[-1] = p_src[0];    p_src[cols] = p_src[cols + 1] = p_src[cols - 1];     for (col = 0; col < cols; col++) {      v = p_src[col];       if ((abs(v - p_src[col - 2]) < flimits[col]) &&          (abs(v - p_src[col - 1]) < flimits[col]) &&          (abs(v - p_src[col + 1]) < flimits[col]) &&          (abs(v - p_src[col + 2]) < flimits[col])) {        unsigned char k1, k2, k3;        k1 = (p_src[col - 2] + p_src[col - 1] + 1) >> 1;        k2 = (p_src[col + 2] + p_src[col + 1] + 1) >> 1;        k3 = (k1 + k2 + 1) >> 1;        v = (k3 + v + 1) >> 1;      }       d[col & 3] = v;       if (col >= 2) p_dst[col - 2] = d[(col - 2) & 3];    }     /* handle the last two pixels */    p_dst[col - 2] = d[(col - 2) & 3];    p_dst[col - 1] = d[(col - 1) & 3];     /* next row */    src += src_pitch;    dst += dst_pitch;  }} void vpx_mbpost_proc_across_ip_c(unsigned char *src, int pitch, int rows,                                 int cols, int flimit) {  int r, c, i;   unsigned char *s = src;  unsigned char d[16];   for (r = 0; r < rows; r++) {    int sumsq = 16;    int sum = 0;     for (i = -8; i < 0; i++) s[i] = s[0];     /* 17 avoids valgrind warning - we buffer values in c in d     * and only write them when we've read 8 ahead...     */    for (i = 0; i < 17; i++) s[i + cols] = s[cols - 1];     for (i = -8; i <= 6; i++) {      sumsq += s[i] * s[i];      sum += s[i];      d[i + 8] = 0;    }     for (c = 0; c < cols + 8; c++) {      int x = s[c + 7] - s[c - 8];      int y = s[c + 7] + s[c - 8];       sum += x;      sumsq += x * y;       d[c & 15] = s[c];       if (sumsq * 15 - sum * sum < flimit) {        d[c & 15] = (8 + sum + s[c]) >> 4;      }       s[c - 8] = d[(c - 8) & 15];    }     s += pitch;  }} void vpx_mbpost_proc_down_c(unsigned char *dst, int pitch, int rows, int cols,                            int flimit) {  int r, c, i;   for (c = 0; c < cols; c++) {    unsigned char *s = &dst[c];    int sumsq = 0;    int sum = 0;    unsigned char d[16];     for (i = -8; i < 0; i++) s[i * pitch] = s[0];     /* 17 avoids valgrind warning - we buffer values in c in d     * and only write them when we've read 8 ahead...     */    for (i = 0; i < 17; i++) s[(i + rows) * pitch] = s[(rows - 1) * pitch];     for (i = -8; i <= 6; i++) {      sumsq += s[i * pitch] * s[i * pitch];      sum += s[i * pitch];    }     for (r = 0; r < rows + 8; r++) {      sumsq += s[7 * pitch] * s[7 * pitch] - s[-8 * pitch] * s[-8 * pitch];      sum += s[7 * pitch] - s[-8 * pitch];      d[r & 15] = s[0];       if (sumsq * 15 - sum * sum < flimit) {        d[r & 15] = (vpx_rv[(r & 127) + (c & 7)] + sum + s[0]) >> 4;      }      if (r >= 8) s[-8 * pitch] = d[(r - 8) & 15];      s += pitch;    }  }}