/* *  Copyright (c) 2015 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 <stdlib.h> #include "./vpx_config.h"#include "./vpx_dsp_rtcd.h"#include "vpx_dsp/vpx_dsp_common.h"#include "vpx_ports/mem.h" static INLINE int8_t signed_char_clamp(int t) {  return (int8_t)clamp(t, -128, 127);} #if CONFIG_VP9_HIGHBITDEPTHstatic INLINE int16_t signed_char_clamp_high(int t, int bd) {  switch (bd) {    case 10: return (int16_t)clamp(t, -128 * 4, 128 * 4 - 1);    case 12: return (int16_t)clamp(t, -128 * 16, 128 * 16 - 1);    case 8:    default: return (int16_t)clamp(t, -128, 128 - 1);  }}#endif // Should we apply any filter at all: 11111111 yes, 00000000 nostatic INLINE int8_t filter_mask(uint8_t limit, uint8_t blimit, uint8_t p3,                                 uint8_t p2, uint8_t p1, uint8_t p0, uint8_t q0,                                 uint8_t q1, uint8_t q2, uint8_t q3) {  int8_t mask = 0;  mask |= (abs(p3 - p2) > limit) * -1;  mask |= (abs(p2 - p1) > limit) * -1;  mask |= (abs(p1 - p0) > limit) * -1;  mask |= (abs(q1 - q0) > limit) * -1;  mask |= (abs(q2 - q1) > limit) * -1;  mask |= (abs(q3 - q2) > limit) * -1;  mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2 > blimit) * -1;  return ~mask;} static INLINE int8_t flat_mask4(uint8_t thresh, uint8_t p3, uint8_t p2,                                uint8_t p1, uint8_t p0, uint8_t q0, uint8_t q1,                                uint8_t q2, uint8_t q3) {  int8_t mask = 0;  mask |= (abs(p1 - p0) > thresh) * -1;  mask |= (abs(q1 - q0) > thresh) * -1;  mask |= (abs(p2 - p0) > thresh) * -1;  mask |= (abs(q2 - q0) > thresh) * -1;  mask |= (abs(p3 - p0) > thresh) * -1;  mask |= (abs(q3 - q0) > thresh) * -1;  return ~mask;} static INLINE int8_t flat_mask5(uint8_t thresh, uint8_t p4, uint8_t p3,                                uint8_t p2, uint8_t p1, uint8_t p0, uint8_t q0,                                uint8_t q1, uint8_t q2, uint8_t q3,                                uint8_t q4) {  int8_t mask = ~flat_mask4(thresh, p3, p2, p1, p0, q0, q1, q2, q3);  mask |= (abs(p4 - p0) > thresh) * -1;  mask |= (abs(q4 - q0) > thresh) * -1;  return ~mask;} // Is there high edge variance internal edge: 11111111 yes, 00000000 nostatic INLINE int8_t hev_mask(uint8_t thresh, uint8_t p1, uint8_t p0,                              uint8_t q0, uint8_t q1) {  int8_t hev = 0;  hev |= (abs(p1 - p0) > thresh) * -1;  hev |= (abs(q1 - q0) > thresh) * -1;  return hev;} static INLINE void filter4(int8_t mask, uint8_t thresh, uint8_t *op1,                           uint8_t *op0, uint8_t *oq0, uint8_t *oq1) {  int8_t filter1, filter2;   const int8_t ps1 = (int8_t)(*op1 ^ 0x80);  const int8_t ps0 = (int8_t)(*op0 ^ 0x80);  const int8_t qs0 = (int8_t)(*oq0 ^ 0x80);  const int8_t qs1 = (int8_t)(*oq1 ^ 0x80);  const int8_t hev = hev_mask(thresh, *op1, *op0, *oq0, *oq1);   // add outer taps if we have high edge variance  int8_t filter = signed_char_clamp(ps1 - qs1) & hev;   // inner taps  filter = signed_char_clamp(filter + 3 * (qs0 - ps0)) & mask;   // save bottom 3 bits so that we round one side +4 and the other +3  // if it equals 4 we'll set it to adjust by -1 to account for the fact  // we'd round it by 3 the other way  filter1 = signed_char_clamp(filter + 4) >> 3;  filter2 = signed_char_clamp(filter + 3) >> 3;   *oq0 = (uint8_t)(signed_char_clamp(qs0 - filter1) ^ 0x80);  *op0 = (uint8_t)(signed_char_clamp(ps0 + filter2) ^ 0x80);   // outer tap adjustments  filter = ROUND_POWER_OF_TWO(filter1, 1) & ~hev;   *oq1 = (uint8_t)(signed_char_clamp(qs1 - filter) ^ 0x80);  *op1 = (uint8_t)(signed_char_clamp(ps1 + filter) ^ 0x80);} void vpx_lpf_horizontal_4_c(uint8_t *s, int pitch, const uint8_t *blimit,                            const uint8_t *limit, const uint8_t *thresh) {  int i;   // loop filter designed to work using chars so that we can make maximum use  // of 8 bit simd instructions.  for (i = 0; i < 8; ++i) {    const uint8_t p3 = s[-4 * pitch], p2 = s[-3 * pitch], p1 = s[-2 * pitch],                  p0 = s[-pitch];    const uint8_t q0 = s[0 * pitch], q1 = s[1 * pitch], q2 = s[2 * pitch],                  q3 = s[3 * pitch];    const int8_t mask =        filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3);    filter4(mask, *thresh, s - 2 * pitch, s - 1 * pitch, s, s + 1 * pitch);    ++s;  }} void vpx_lpf_horizontal_4_dual_c(uint8_t *s, int pitch, const uint8_t *blimit0,                                 const uint8_t *limit0, const uint8_t *thresh0,                                 const uint8_t *blimit1, const uint8_t *limit1,                                 const uint8_t *thresh1) {  vpx_lpf_horizontal_4_c(s, pitch, blimit0, limit0, thresh0);  vpx_lpf_horizontal_4_c(s + 8, pitch, blimit1, limit1, thresh1);} void vpx_lpf_vertical_4_c(uint8_t *s, int pitch, const uint8_t *blimit,                          const uint8_t *limit, const uint8_t *thresh) {  int i;   // loop filter designed to work using chars so that we can make maximum use  // of 8 bit simd instructions.  for (i = 0; i < 8; ++i) {    const uint8_t p3 = s[-4], p2 = s[-3], p1 = s[-2], p0 = s[-1];    const uint8_t q0 = s[0], q1 = s[1], q2 = s[2], q3 = s[3];    const int8_t mask =        filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3);    filter4(mask, *thresh, s - 2, s - 1, s, s + 1);    s += pitch;  }} void vpx_lpf_vertical_4_dual_c(uint8_t *s, int pitch, const uint8_t *blimit0,                               const uint8_t *limit0, const uint8_t *thresh0,                               const uint8_t *blimit1, const uint8_t *limit1,                               const uint8_t *thresh1) {  vpx_lpf_vertical_4_c(s, pitch, blimit0, limit0, thresh0);  vpx_lpf_vertical_4_c(s + 8 * pitch, pitch, blimit1, limit1, thresh1);} static INLINE void filter8(int8_t mask, uint8_t thresh, uint8_t flat,                           uint8_t *op3, uint8_t *op2, uint8_t *op1,                           uint8_t *op0, uint8_t *oq0, uint8_t *oq1,                           uint8_t *oq2, uint8_t *oq3) {  if (flat && mask) {    const uint8_t p3 = *op3, p2 = *op2, p1 = *op1, p0 = *op0;    const uint8_t q0 = *oq0, q1 = *oq1, q2 = *oq2, q3 = *oq3;     // 7-tap filter [1, 1, 1, 2, 1, 1, 1]    *op2 = ROUND_POWER_OF_TWO(p3 + p3 + p3 + 2 * p2 + p1 + p0 + q0, 3);    *op1 = ROUND_POWER_OF_TWO(p3 + p3 + p2 + 2 * p1 + p0 + q0 + q1, 3);    *op0 = ROUND_POWER_OF_TWO(p3 + p2 + p1 + 2 * p0 + q0 + q1 + q2, 3);    *oq0 = ROUND_POWER_OF_TWO(p2 + p1 + p0 + 2 * q0 + q1 + q2 + q3, 3);    *oq1 = ROUND_POWER_OF_TWO(p1 + p0 + q0 + 2 * q1 + q2 + q3 + q3, 3);    *oq2 = ROUND_POWER_OF_TWO(p0 + q0 + q1 + 2 * q2 + q3 + q3 + q3, 3);  } else {    filter4(mask, thresh, op1, op0, oq0, oq1);  }} void vpx_lpf_horizontal_8_c(uint8_t *s, int pitch, const uint8_t *blimit,                            const uint8_t *limit, const uint8_t *thresh) {  int i;   // loop filter designed to work using chars so that we can make maximum use  // of 8 bit simd instructions.  for (i = 0; i < 8; ++i) {    const uint8_t p3 = s[-4 * pitch], p2 = s[-3 * pitch], p1 = s[-2 * pitch],                  p0 = s[-pitch];    const uint8_t q0 = s[0 * pitch], q1 = s[1 * pitch], q2 = s[2 * pitch],                  q3 = s[3 * pitch];     const int8_t mask =        filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3);    const int8_t flat = flat_mask4(1, p3, p2, p1, p0, q0, q1, q2, q3);    filter8(mask, *thresh, flat, s - 4 * pitch, s - 3 * pitch, s - 2 * pitch,            s - 1 * pitch, s, s + 1 * pitch, s + 2 * pitch, s + 3 * pitch);    ++s;  }} void vpx_lpf_horizontal_8_dual_c(uint8_t *s, int pitch, const uint8_t *blimit0,                                 const uint8_t *limit0, const uint8_t *thresh0,                                 const uint8_t *blimit1, const uint8_t *limit1,                                 const uint8_t *thresh1) {  vpx_lpf_horizontal_8_c(s, pitch, blimit0, limit0, thresh0);  vpx_lpf_horizontal_8_c(s + 8, pitch, blimit1, limit1, thresh1);} void vpx_lpf_vertical_8_c(uint8_t *s, int pitch, const uint8_t *blimit,                          const uint8_t *limit, const uint8_t *thresh) {  int i;   for (i = 0; i < 8; ++i) {    const uint8_t p3 = s[-4], p2 = s[-3], p1 = s[-2], p0 = s[-1];    const uint8_t q0 = s[0], q1 = s[1], q2 = s[2], q3 = s[3];    const int8_t mask =        filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3);    const int8_t flat = flat_mask4(1, p3, p2, p1, p0, q0, q1, q2, q3);    filter8(mask, *thresh, flat, s - 4, s - 3, s - 2, s - 1, s, s + 1, s + 2,            s + 3);    s += pitch;  }} void vpx_lpf_vertical_8_dual_c(uint8_t *s, int pitch, const uint8_t *blimit0,                               const uint8_t *limit0, const uint8_t *thresh0,                               const uint8_t *blimit1, const uint8_t *limit1,                               const uint8_t *thresh1) {  vpx_lpf_vertical_8_c(s, pitch, blimit0, limit0, thresh0);  vpx_lpf_vertical_8_c(s + 8 * pitch, pitch, blimit1, limit1, thresh1);} static INLINE void filter16(int8_t mask, uint8_t thresh, uint8_t flat,                            uint8_t flat2, uint8_t *op7, uint8_t *op6,                            uint8_t *op5, uint8_t *op4, uint8_t *op3,                            uint8_t *op2, uint8_t *op1, uint8_t *op0,                            uint8_t *oq0, uint8_t *oq1, uint8_t *oq2,                            uint8_t *oq3, uint8_t *oq4, uint8_t *oq5,                            uint8_t *oq6, uint8_t *oq7) {  if (flat2 && flat && mask) {    const uint8_t p7 = *op7, p6 = *op6, p5 = *op5, p4 = *op4, p3 = *op3,                  p2 = *op2, p1 = *op1, p0 = *op0;     const uint8_t q0 = *oq0, q1 = *oq1, q2 = *oq2, q3 = *oq3, q4 = *oq4,                  q5 = *oq5, q6 = *oq6, q7 = *oq7;     // 15-tap filter [1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1]    *op6 = ROUND_POWER_OF_TWO(        p7 * 7 + p6 * 2 + p5 + p4 + p3 + p2 + p1 + p0 + q0, 4);    *op5 = ROUND_POWER_OF_TWO(        p7 * 6 + p6 + p5 * 2 + p4 + p3 + p2 + p1 + p0 + q0 + q1, 4);    *op4 = ROUND_POWER_OF_TWO(        p7 * 5 + p6 + p5 + p4 * 2 + p3 + p2 + p1 + p0 + q0 + q1 + q2, 4);    *op3 = ROUND_POWER_OF_TWO(        p7 * 4 + p6 + p5 + p4 + p3 * 2 + p2 + p1 + p0 + q0 + q1 + q2 + q3, 4);    *op2 = ROUND_POWER_OF_TWO(        p7 * 3 + p6 + p5 + p4 + p3 + p2 * 2 + p1 + p0 + q0 + q1 + q2 + q3 + q4,        4);    *op1 = ROUND_POWER_OF_TWO(p7 * 2 + p6 + p5 + p4 + p3 + p2 + p1 * 2 + p0 +                                  q0 + q1 + q2 + q3 + q4 + q5,                              4);    *op0 = ROUND_POWER_OF_TWO(p7 + p6 + p5 + p4 + p3 + p2 + p1 + p0 * 2 + q0 +                                  q1 + q2 + q3 + q4 + q5 + q6,                              4);    *oq0 = ROUND_POWER_OF_TWO(p6 + p5 + p4 + p3 + p2 + p1 + p0 + q0 * 2 + q1 +                                  q2 + q3 + q4 + q5 + q6 + q7,                              4);    *oq1 = ROUND_POWER_OF_TWO(p5 + p4 + p3 + p2 + p1 + p0 + q0 + q1 * 2 + q2 +                                  q3 + q4 + q5 + q6 + q7 * 2,                              4);    *oq2 = ROUND_POWER_OF_TWO(        p4 + p3 + p2 + p1 + p0 + q0 + q1 + q2 * 2 + q3 + q4 + q5 + q6 + q7 * 3,        4);    *oq3 = ROUND_POWER_OF_TWO(        p3 + p2 + p1 + p0 + q0 + q1 + q2 + q3 * 2 + q4 + q5 + q6 + q7 * 4, 4);    *oq4 = ROUND_POWER_OF_TWO(        p2 + p1 + p0 + q0 + q1 + q2 + q3 + q4 * 2 + q5 + q6 + q7 * 5, 4);    *oq5 = ROUND_POWER_OF_TWO(        p1 + p0 + q0 + q1 + q2 + q3 + q4 + q5 * 2 + q6 + q7 * 6, 4);    *oq6 = ROUND_POWER_OF_TWO(        p0 + q0 + q1 + q2 + q3 + q4 + q5 + q6 * 2 + q7 * 7, 4);  } else {    filter8(mask, thresh, flat, op3, op2, op1, op0, oq0, oq1, oq2, oq3);  }} static void mb_lpf_horizontal_edge_w(uint8_t *s, int pitch,                                     const uint8_t *blimit,                                     const uint8_t *limit,                                     const uint8_t *thresh, int count) {  int i;   // loop filter designed to work using chars so that we can make maximum use  // of 8 bit simd instructions.  for (i = 0; i < 8 * count; ++i) {    const uint8_t p3 = s[-4 * pitch], p2 = s[-3 * pitch], p1 = s[-2 * pitch],                  p0 = s[-pitch];    const uint8_t q0 = s[0 * pitch], q1 = s[1 * pitch], q2 = s[2 * pitch],                  q3 = s[3 * pitch];    const int8_t mask =        filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3);    const int8_t flat = flat_mask4(1, p3, p2, p1, p0, q0, q1, q2, q3);    const int8_t flat2 = flat_mask5(        1, s[-8 * pitch], s[-7 * pitch], s[-6 * pitch], s[-5 * pitch], p0, q0,        s[4 * pitch], s[5 * pitch], s[6 * pitch], s[7 * pitch]);     filter16(mask, *thresh, flat, flat2, s - 8 * pitch, s - 7 * pitch,             s - 6 * pitch, s - 5 * pitch, s - 4 * pitch, s - 3 * pitch,             s - 2 * pitch, s - 1 * pitch, s, s + 1 * pitch, s + 2 * pitch,             s + 3 * pitch, s + 4 * pitch, s + 5 * pitch, s + 6 * pitch,             s + 7 * pitch);    ++s;  }} void vpx_lpf_horizontal_16_c(uint8_t *s, int pitch, const uint8_t *blimit,                             const uint8_t *limit, const uint8_t *thresh) {  mb_lpf_horizontal_edge_w(s, pitch, blimit, limit, thresh, 1);} void vpx_lpf_horizontal_16_dual_c(uint8_t *s, int pitch, const uint8_t *blimit,                                  const uint8_t *limit, const uint8_t *thresh) {  mb_lpf_horizontal_edge_w(s, pitch, blimit, limit, thresh, 2);} static void mb_lpf_vertical_edge_w(uint8_t *s, int pitch, const uint8_t *blimit,                                   const uint8_t *limit, const uint8_t *thresh,                                   int count) {  int i;   for (i = 0; i < count; ++i) {    const uint8_t p3 = s[-4], p2 = s[-3], p1 = s[-2], p0 = s[-1];    const uint8_t q0 = s[0], q1 = s[1], q2 = s[2], q3 = s[3];    const int8_t mask =        filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3);    const int8_t flat = flat_mask4(1, p3, p2, p1, p0, q0, q1, q2, q3);    const int8_t flat2 = flat_mask5(1, s[-8], s[-7], s[-6], s[-5], p0, q0, s[4],                                    s[5], s[6], s[7]);     filter16(mask, *thresh, flat, flat2, s - 8, s - 7, s - 6, s - 5, s - 4,             s - 3, s - 2, s - 1, s, s + 1, s + 2, s + 3, s + 4, s + 5, s + 6,             s + 7);    s += pitch;  }} void vpx_lpf_vertical_16_c(uint8_t *s, int pitch, const uint8_t *blimit,                           const uint8_t *limit, const uint8_t *thresh) {  mb_lpf_vertical_edge_w(s, pitch, blimit, limit, thresh, 8);} void vpx_lpf_vertical_16_dual_c(uint8_t *s, int pitch, const uint8_t *blimit,                                const uint8_t *limit, const uint8_t *thresh) {  mb_lpf_vertical_edge_w(s, pitch, blimit, limit, thresh, 16);} #if CONFIG_VP9_HIGHBITDEPTH// Should we apply any filter at all: 11111111 yes, 00000000 no ?static INLINE int8_t highbd_filter_mask(uint8_t limit, uint8_t blimit,                                        uint16_t p3, uint16_t p2, uint16_t p1,                                        uint16_t p0, uint16_t q0, uint16_t q1,                                        uint16_t q2, uint16_t q3, int bd) {  int8_t mask = 0;  int16_t limit16 = (uint16_t)limit << (bd - 8);  int16_t blimit16 = (uint16_t)blimit << (bd - 8);  mask |= (abs(p3 - p2) > limit16) * -1;  mask |= (abs(p2 - p1) > limit16) * -1;  mask |= (abs(p1 - p0) > limit16) * -1;  mask |= (abs(q1 - q0) > limit16) * -1;  mask |= (abs(q2 - q1) > limit16) * -1;  mask |= (abs(q3 - q2) > limit16) * -1;  mask |= (abs(p0 - q0) * 2 + abs(p1 - q1) / 2 > blimit16) * -1;  return ~mask;} static INLINE int8_t highbd_flat_mask4(uint8_t thresh, uint16_t p3, uint16_t p2,                                       uint16_t p1, uint16_t p0, uint16_t q0,                                       uint16_t q1, uint16_t q2, uint16_t q3,                                       int bd) {  int8_t mask = 0;  int16_t thresh16 = (uint16_t)thresh << (bd - 8);  mask |= (abs(p1 - p0) > thresh16) * -1;  mask |= (abs(q1 - q0) > thresh16) * -1;  mask |= (abs(p2 - p0) > thresh16) * -1;  mask |= (abs(q2 - q0) > thresh16) * -1;  mask |= (abs(p3 - p0) > thresh16) * -1;  mask |= (abs(q3 - q0) > thresh16) * -1;  return ~mask;} static INLINE int8_t highbd_flat_mask5(uint8_t thresh, uint16_t p4, uint16_t p3,                                       uint16_t p2, uint16_t p1, uint16_t p0,                                       uint16_t q0, uint16_t q1, uint16_t q2,                                       uint16_t q3, uint16_t q4, int bd) {  int8_t mask = ~highbd_flat_mask4(thresh, p3, p2, p1, p0, q0, q1, q2, q3, bd);  int16_t thresh16 = (uint16_t)thresh << (bd - 8);  mask |= (abs(p4 - p0) > thresh16) * -1;  mask |= (abs(q4 - q0) > thresh16) * -1;  return ~mask;} // Is there high edge variance internal edge:// 11111111_11111111 yes, 00000000_00000000 no ?static INLINE int16_t highbd_hev_mask(uint8_t thresh, uint16_t p1, uint16_t p0,                                      uint16_t q0, uint16_t q1, int bd) {  int16_t hev = 0;  int16_t thresh16 = (uint16_t)thresh << (bd - 8);  hev |= (abs(p1 - p0) > thresh16) * -1;  hev |= (abs(q1 - q0) > thresh16) * -1;  return hev;} static INLINE void highbd_filter4(int8_t mask, uint8_t thresh, uint16_t *op1,                                  uint16_t *op0, uint16_t *oq0, uint16_t *oq1,                                  int bd) {  int16_t filter1, filter2;  // ^0x80 equivalent to subtracting 0x80 from the values to turn them  // into -128 to +127 instead of 0 to 255.  int shift = bd - 8;  const int16_t ps1 = (int16_t)*op1 - (0x80 << shift);  const int16_t ps0 = (int16_t)*op0 - (0x80 << shift);  const int16_t qs0 = (int16_t)*oq0 - (0x80 << shift);  const int16_t qs1 = (int16_t)*oq1 - (0x80 << shift);  const int16_t hev = highbd_hev_mask(thresh, *op1, *op0, *oq0, *oq1, bd);   // Add outer taps if we have high edge variance.  int16_t filter = signed_char_clamp_high(ps1 - qs1, bd) & hev;   // Inner taps.  filter = signed_char_clamp_high(filter + 3 * (qs0 - ps0), bd) & mask;   // Save bottom 3 bits so that we round one side +4 and the other +3  // if it equals 4 we'll set it to adjust by -1 to account for the fact  // we'd round it by 3 the other way.  filter1 = signed_char_clamp_high(filter + 4, bd) >> 3;  filter2 = signed_char_clamp_high(filter + 3, bd) >> 3;   *oq0 = signed_char_clamp_high(qs0 - filter1, bd) + (0x80 << shift);  *op0 = signed_char_clamp_high(ps0 + filter2, bd) + (0x80 << shift);   // Outer tap adjustments.  filter = ROUND_POWER_OF_TWO(filter1, 1) & ~hev;   *oq1 = signed_char_clamp_high(qs1 - filter, bd) + (0x80 << shift);  *op1 = signed_char_clamp_high(ps1 + filter, bd) + (0x80 << shift);} void vpx_highbd_lpf_horizontal_4_c(uint16_t *s, int pitch,                                   const uint8_t *blimit, const uint8_t *limit,                                   const uint8_t *thresh, int bd) {  int i;   // loop filter designed to work using chars so that we can make maximum use  // of 8 bit simd instructions.  for (i = 0; i < 8; ++i) {    const uint16_t p3 = s[-4 * pitch];    const uint16_t p2 = s[-3 * pitch];    const uint16_t p1 = s[-2 * pitch];    const uint16_t p0 = s[-pitch];    const uint16_t q0 = s[0 * pitch];    const uint16_t q1 = s[1 * pitch];    const uint16_t q2 = s[2 * pitch];    const uint16_t q3 = s[3 * pitch];    const int8_t mask =        highbd_filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3, bd);    highbd_filter4(mask, *thresh, s - 2 * pitch, s - 1 * pitch, s,                   s + 1 * pitch, bd);    ++s;  }} void vpx_highbd_lpf_horizontal_4_dual_c(    uint16_t *s, int pitch, const uint8_t *blimit0, const uint8_t *limit0,    const uint8_t *thresh0, const uint8_t *blimit1, const uint8_t *limit1,    const uint8_t *thresh1, int bd) {  vpx_highbd_lpf_horizontal_4_c(s, pitch, blimit0, limit0, thresh0, bd);  vpx_highbd_lpf_horizontal_4_c(s + 8, pitch, blimit1, limit1, thresh1, bd);} void vpx_highbd_lpf_vertical_4_c(uint16_t *s, int pitch, const uint8_t *blimit,                                 const uint8_t *limit, const uint8_t *thresh,                                 int bd) {  int i;   // loop filter designed to work using chars so that we can make maximum use  // of 8 bit simd instructions.  for (i = 0; i < 8; ++i) {    const uint16_t p3 = s[-4], p2 = s[-3], p1 = s[-2], p0 = s[-1];    const uint16_t q0 = s[0], q1 = s[1], q2 = s[2], q3 = s[3];    const int8_t mask =        highbd_filter_mask(*limit, *blimit, p3, p2, p1, p0, q0, q1, q2, q3, bd);    highbd_filter4(mask, *thresh, s - 2, s - 1, s, s + 1, bd);    s += pitch;  }} void vpx_highbd_lpf_vertical_4_dual_c(    uint16_t *s, int pitch, const uint8_t *blimit0, const uint8_t *limit0,

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