Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vp9/common/vp9_postproc.c

Index: third_party/libvpx/source/libvpx/vp9/common/vp9_postproc.c
diff --git a/third_party/libvpx/source/libvpx/vp9/common/vp9_postproc.c b/third_party/libvpx/source/libvpx/vp9/common/vp9_postproc.c
new file mode 100644
index 0000000000000000000000000000000000000000..983a4744dd64a677538cafca252b35a272c30466
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vp9/common/vp9_postproc.c
@@ -0,0 +1,747 @@
+/*
+ *  Copyright (c) 2010 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 <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "./vpx_config.h"
+#include "./vpx_scale_rtcd.h"
+#include "./vp9_rtcd.h"
+
+#include "vpx_scale/vpx_scale.h"
+#include "vpx_scale/yv12config.h"
+
+#if CONFIG_VP9_HIGHBITDEPTH
+#include "vp9/common/vp9_common.h"
+#endif
+#include "vp9/common/vp9_onyxc_int.h"
+#include "vp9/common/vp9_postproc.h"
+#include "vp9/common/vp9_systemdependent.h"
+#include "vp9/common/vp9_textblit.h"
+
+#if CONFIG_VP9_POSTPROC
+static const short kernel5[] = {
+  1, 1, 4, 1, 1
+};
+
+const short vp9_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,
+};
+
+static const uint8_t q_diff_thresh = 20;
+static const uint8_t last_q_thresh = 170;
+
+void vp9_post_proc_down_and_across_c(const uint8_t *src_ptr,
+                                     uint8_t *dst_ptr,
+                                     int src_pixels_per_line,
+                                     int dst_pixels_per_line,
+                                     int rows,
+                                     int cols,
+                                     int flimit) {
+  uint8_t const *p_src;
+  uint8_t *p_dst;
+  int row, col, i, v, kernel;
+  int pitch = src_pixels_per_line;
+  uint8_t d[8];
+  (void)dst_pixels_per_line;
+
+  for (row = 0; row < rows; row++) {
+    /* post_proc_down for one row */
+    p_src = src_ptr;
+    p_dst = dst_ptr;
+
+    for (col = 0; col < cols; col++) {
+      kernel = 4;
+      v = p_src[col];
+
+      for (i = -2; i <= 2; i++) {
+        if (abs(v - p_src[col + i * pitch]) > flimit)
+          goto down_skip_convolve;
+
+        kernel += kernel5[2 + i] * p_src[col + i * pitch];
+      }
+
+      v = (kernel >> 3);
+    down_skip_convolve:
+      p_dst[col] = v;
+    }
+
+    /* now post_proc_across */
+    p_src = dst_ptr;
+    p_dst = dst_ptr;
+
+    for (i = 0; i < 8; i++)
+      d[i] = p_src[i];
+
+    for (col = 0; col < cols; col++) {
+      kernel = 4;
+      v = p_src[col];
+
+      d[col & 7] = v;
+
+      for (i = -2; i <= 2; i++) {
+        if (abs(v - p_src[col + i]) > flimit)
+          goto across_skip_convolve;
+
+        kernel += kernel5[2 + i] * p_src[col + i];
+      }
+
+      d[col & 7] = (kernel >> 3);
+    across_skip_convolve:
+
+      if (col >= 2)
+        p_dst[col - 2] = d[(col - 2) & 7];
+    }
+
+    /* handle the last two pixels */
+    p_dst[col - 2] = d[(col - 2) & 7];
+    p_dst[col - 1] = d[(col - 1) & 7];
+
+
+    /* next row */
+    src_ptr += pitch;
+    dst_ptr += pitch;
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_post_proc_down_and_across_c(const uint16_t *src_ptr,
+                                            uint16_t *dst_ptr,
+                                            int src_pixels_per_line,
+                                            int dst_pixels_per_line,
+                                            int rows,
+                                            int cols,
+                                            int flimit) {
+  uint16_t const *p_src;
+  uint16_t *p_dst;
+  int row, col, i, v, kernel;
+  int pitch = src_pixels_per_line;
+  uint16_t d[8];
+
+  for (row = 0; row < rows; row++) {
+    // post_proc_down for one row.
+    p_src = src_ptr;
+    p_dst = dst_ptr;
+
+    for (col = 0; col < cols; col++) {
+      kernel = 4;
+      v = p_src[col];
+
+      for (i = -2; i <= 2; i++) {
+        if (abs(v - p_src[col + i * pitch]) > flimit)
+          goto down_skip_convolve;
+
+        kernel += kernel5[2 + i] * p_src[col + i * pitch];
+      }
+
+      v = (kernel >> 3);
+
+    down_skip_convolve:
+      p_dst[col] = v;
+    }
+
+    /* now post_proc_across */
+    p_src = dst_ptr;
+    p_dst = dst_ptr;
+
+    for (i = 0; i < 8; i++)
+      d[i] = p_src[i];
+
+    for (col = 0; col < cols; col++) {
+      kernel = 4;
+      v = p_src[col];
+
+      d[col & 7] = v;
+
+      for (i = -2; i <= 2; i++) {
+        if (abs(v - p_src[col + i]) > flimit)
+          goto across_skip_convolve;
+
+        kernel += kernel5[2 + i] * p_src[col + i];
+      }
+
+      d[col & 7] = (kernel >> 3);
+
+    across_skip_convolve:
+      if (col >= 2)
+        p_dst[col - 2] = d[(col - 2) & 7];
+    }
+
+    /* handle the last two pixels */
+    p_dst[col - 2] = d[(col - 2) & 7];
+    p_dst[col - 1] = d[(col - 1) & 7];
+
+
+    /* next row */
+    src_ptr += pitch;
+    dst_ptr += dst_pixels_per_line;
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+
+static int q2mbl(int x) {
+  if (x < 20) x = 20;
+
+  x = 50 + (x - 50) * 10 / 8;
+  return x * x / 3;
+}
+
+void vp9_mbpost_proc_across_ip_c(uint8_t *src, int pitch,
+                                 int rows, int cols, int flimit) {
+  int r, c, i;
+  uint8_t *s = src;
+  uint8_t d[16];
+
+  for (r = 0; r < rows; r++) {
+    int sumsq = 0;
+    int sum = 0;
+
+    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;
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_mbpost_proc_across_ip_c(uint16_t *src, int pitch,
+                                        int rows, int cols, int flimit) {
+  int r, c, i;
+
+  uint16_t *s = src;
+  uint16_t d[16];
+
+
+  for (r = 0; r < rows; r++) {
+    int sumsq = 0;
+    int sum   = 0;
+
+    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;
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+
+void vp9_mbpost_proc_down_c(uint8_t *dst, int pitch,
+                            int rows, int cols, int flimit) {
+  int r, c, i;
+  const short *rv3 = &vp9_rv[63 & rand()]; // NOLINT
+
+  for (c = 0; c < cols; c++) {
+    uint8_t *s = &dst[c];
+    int sumsq = 0;
+    int sum   = 0;
+    uint8_t d[16];
+    const short *rv2 = rv3 + ((c * 17) & 127);
+
+    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] = (rv2[r & 127] + sum + s[0]) >> 4;
+      }
+
+      s[-8 * pitch] = d[(r - 8) & 15];
+      s += pitch;
+    }
+  }
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_mbpost_proc_down_c(uint16_t *dst, int pitch,
+                                   int rows, int cols, int flimit) {
+  int r, c, i;
+  const int16_t *rv3 = &vp9_rv[63 & rand()];  // NOLINT
+
+  for (c = 0; c < cols; c++) {
+    uint16_t *s = &dst[c];
+    int sumsq = 0;
+    int sum = 0;
+    uint16_t d[16];
+    const int16_t *rv2 = rv3 + ((c * 17) & 127);
+
+    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] = (rv2[r & 127] + sum + s[0]) >> 4;
+      }
+
+      s[-8 * pitch] = d[(r - 8) & 15];
+      s += pitch;
+    }
+  }
+}
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+
+static void deblock_and_de_macro_block(YV12_BUFFER_CONFIG   *source,
+                                       YV12_BUFFER_CONFIG   *post,
+                                       int                   q,
+                                       int                   low_var_thresh,
+                                       int                   flag) {
+  double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
+  int ppl = (int)(level + .5);
+  (void) low_var_thresh;
+  (void) flag;
+
+#if CONFIG_VP9_HIGHBITDEPTH
+  if (source->flags & YV12_FLAG_HIGHBITDEPTH) {
+    vp9_highbd_post_proc_down_and_across(CONVERT_TO_SHORTPTR(source->y_buffer),
+                                         CONVERT_TO_SHORTPTR(post->y_buffer),
+                                         source->y_stride, post->y_stride,
+                                         source->y_height, source->y_width,
+                                         ppl);
+
+    vp9_highbd_mbpost_proc_across_ip(CONVERT_TO_SHORTPTR(post->y_buffer),
+                                     post->y_stride, post->y_height,
+                                     post->y_width, q2mbl(q));
+
+    vp9_highbd_mbpost_proc_down(CONVERT_TO_SHORTPTR(post->y_buffer),
+                                post->y_stride, post->y_height,
+                                post->y_width, q2mbl(q));
+
+    vp9_highbd_post_proc_down_and_across(CONVERT_TO_SHORTPTR(source->u_buffer),
+                                         CONVERT_TO_SHORTPTR(post->u_buffer),
+                                         source->uv_stride, post->uv_stride,
+                                         source->uv_height, source->uv_width,
+                                         ppl);
+    vp9_highbd_post_proc_down_and_across(CONVERT_TO_SHORTPTR(source->v_buffer),
+                                         CONVERT_TO_SHORTPTR(post->v_buffer),
+                                         source->uv_stride, post->uv_stride,
+                                         source->uv_height, source->uv_width,
+                                         ppl);
+  } else {
+    vp9_post_proc_down_and_across(source->y_buffer, post->y_buffer,
+                                  source->y_stride, post->y_stride,
+                                  source->y_height, source->y_width, ppl);
+
+    vp9_mbpost_proc_across_ip(post->y_buffer, post->y_stride, post->y_height,
+                              post->y_width, q2mbl(q));
+
+    vp9_mbpost_proc_down(post->y_buffer, post->y_stride, post->y_height,
+                         post->y_width, q2mbl(q));
+
+    vp9_post_proc_down_and_across(source->u_buffer, post->u_buffer,
+                                  source->uv_stride, post->uv_stride,
+                                  source->uv_height, source->uv_width, ppl);
+    vp9_post_proc_down_and_across(source->v_buffer, post->v_buffer,
+                                  source->uv_stride, post->uv_stride,
+                                  source->uv_height, source->uv_width, ppl);
+  }
+#else
+  vp9_post_proc_down_and_across(source->y_buffer, post->y_buffer,
+                                source->y_stride, post->y_stride,
+                                source->y_height, source->y_width, ppl);
+
+  vp9_mbpost_proc_across_ip(post->y_buffer, post->y_stride, post->y_height,
+                            post->y_width, q2mbl(q));
+
+  vp9_mbpost_proc_down(post->y_buffer, post->y_stride, post->y_height,
+                       post->y_width, q2mbl(q));
+
+  vp9_post_proc_down_and_across(source->u_buffer, post->u_buffer,
+                                source->uv_stride, post->uv_stride,
+                                source->uv_height, source->uv_width, ppl);
+  vp9_post_proc_down_and_across(source->v_buffer, post->v_buffer,
+                                source->uv_stride, post->uv_stride,
+                                source->uv_height, source->uv_width, ppl);
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+}
+
+void vp9_deblock(const YV12_BUFFER_CONFIG *src, YV12_BUFFER_CONFIG *dst,
+                 int q) {
+  const int ppl = (int)(6.0e-05 * q * q * q - 0.0067 * q * q + 0.306 * q
+                        + 0.0065 + 0.5);
+  int i;
+
+  const uint8_t *const srcs[3] = {src->y_buffer, src->u_buffer, src->v_buffer};
+  const int src_strides[3] = {src->y_stride, src->uv_stride, src->uv_stride};
+  const int src_widths[3] = {src->y_width, src->uv_width, src->uv_width};
+  const int src_heights[3] = {src->y_height, src->uv_height, src->uv_height};
+
+  uint8_t *const dsts[3] = {dst->y_buffer, dst->u_buffer, dst->v_buffer};
+  const int dst_strides[3] = {dst->y_stride, dst->uv_stride, dst->uv_stride};
+
+  for (i = 0; i < MAX_MB_PLANE; ++i) {
+#if CONFIG_VP9_HIGHBITDEPTH
+    assert((src->flags & YV12_FLAG_HIGHBITDEPTH) ==
+           (dst->flags & YV12_FLAG_HIGHBITDEPTH));
+    if (src->flags & YV12_FLAG_HIGHBITDEPTH) {
+      vp9_highbd_post_proc_down_and_across(CONVERT_TO_SHORTPTR(srcs[i]),
+                                           CONVERT_TO_SHORTPTR(dsts[i]),
+                                           src_strides[i], dst_strides[i],
+                                           src_heights[i], src_widths[i], ppl);
+    } else {
+      vp9_post_proc_down_and_across(srcs[i], dsts[i],
+                                    src_strides[i], dst_strides[i],
+                                    src_heights[i], src_widths[i], ppl);
+    }
+#else
+    vp9_post_proc_down_and_across(srcs[i], dsts[i],
+                                  src_strides[i], dst_strides[i],
+                                  src_heights[i], src_widths[i], ppl);
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+  }
+}
+
+void vp9_denoise(const YV12_BUFFER_CONFIG *src, YV12_BUFFER_CONFIG *dst,
+                 int q) {
+  const int ppl = (int)(6.0e-05 * q * q * q - 0.0067 * q * q + 0.306 * q
+                        + 0.0065 + 0.5);
+  int i;
+
+  const uint8_t *const srcs[3] = {src->y_buffer, src->u_buffer, src->v_buffer};
+  const int src_strides[3] = {src->y_stride, src->uv_stride, src->uv_stride};
+  const int src_widths[3] = {src->y_width, src->uv_width, src->uv_width};
+  const int src_heights[3] = {src->y_height, src->uv_height, src->uv_height};
+
+  uint8_t *const dsts[3] = {dst->y_buffer, dst->u_buffer, dst->v_buffer};
+  const int dst_strides[3] = {dst->y_stride, dst->uv_stride, dst->uv_stride};
+
+  for (i = 0; i < MAX_MB_PLANE; ++i) {
+    const int src_stride = src_strides[i];
+    const int src_width = src_widths[i] - 4;
+    const int src_height = src_heights[i] - 4;
+    const int dst_stride = dst_strides[i];
+
+#if CONFIG_VP9_HIGHBITDEPTH
+    assert((src->flags & YV12_FLAG_HIGHBITDEPTH) ==
+           (dst->flags & YV12_FLAG_HIGHBITDEPTH));
+    if (src->flags & YV12_FLAG_HIGHBITDEPTH) {
+      const uint16_t *const src_plane = CONVERT_TO_SHORTPTR(
+          srcs[i] + 2 * src_stride + 2);
+      uint16_t *const dst_plane = CONVERT_TO_SHORTPTR(
+          dsts[i] + 2 * dst_stride + 2);
+      vp9_highbd_post_proc_down_and_across(src_plane, dst_plane, src_stride,
+                                           dst_stride, src_height, src_width,
+                                           ppl);
+    } else {
+      const uint8_t *const src_plane = srcs[i] + 2 * src_stride + 2;
+      uint8_t *const dst_plane = dsts[i] + 2 * dst_stride + 2;
+
+      vp9_post_proc_down_and_across(src_plane, dst_plane, src_stride,
+                                    dst_stride, src_height, src_width, ppl);
+    }
+#else
+    const uint8_t *const src_plane = srcs[i] + 2 * src_stride + 2;
+    uint8_t *const dst_plane = dsts[i] + 2 * dst_stride + 2;
+    vp9_post_proc_down_and_across(src_plane, dst_plane, src_stride, dst_stride,
+                                  src_height, src_width, ppl);
+#endif
+  }
+}
+
+static double gaussian(double sigma, double mu, double x) {
+  return 1 / (sigma * sqrt(2.0 * 3.14159265)) *
+         (exp(-(x - mu) * (x - mu) / (2 * sigma * sigma)));
+}
+
+static void fillrd(struct postproc_state *state, int q, int a) {
+  char char_dist[300];
+
+  double sigma;
+  int ai = a, qi = q, i;
+
+  vp9_clear_system_state();
+
+  sigma = ai + .5 + .6 * (63 - qi) / 63.0;
+
+  /* set up a lookup table of 256 entries that matches
+   * a gaussian distribution with sigma determined by q.
+   */
+  {
+    int next, j;
+
+    next = 0;
+
+    for (i = -32; i < 32; i++) {
+      int a_i = (int)(0.5 + 256 * gaussian(sigma, 0, i));
+
+      if (a_i) {
+        for (j = 0; j < a_i; j++) {
+          char_dist[next + j] = (char) i;
+        }
+
+        next = next + j;
+      }
+    }
+
+    for (; next < 256; next++)
+      char_dist[next] = 0;
+  }
+
+  for (i = 0; i < 3072; i++) {
+    state->noise[i] = char_dist[rand() & 0xff];  // NOLINT
+  }
+
+  for (i = 0; i < 16; i++) {
+    state->blackclamp[i] = -char_dist[0];
+    state->whiteclamp[i] = -char_dist[0];
+    state->bothclamp[i] = -2 * char_dist[0];
+  }
+
+  state->last_q = q;
+  state->last_noise = a;
+}
+
+void vp9_plane_add_noise_c(uint8_t *start, char *noise,
+                           char blackclamp[16],
+                           char whiteclamp[16],
+                           char bothclamp[16],
+                           unsigned int width, unsigned int height, int pitch) {
+  unsigned int i, j;
+
+  // TODO(jbb): why does simd code use both but c doesn't,  normalize and
+  // fix..
+  (void) bothclamp;
+  for (i = 0; i < height; i++) {
+    uint8_t *pos = start + i * pitch;
+    char  *ref = (char *)(noise + (rand() & 0xff));  // NOLINT
+
+    for (j = 0; j < width; j++) {
+      if (pos[j] < blackclamp[0])
+        pos[j] = blackclamp[0];
+
+      if (pos[j] > 255 + whiteclamp[0])
+        pos[j] = 255 + whiteclamp[0];
+
+      pos[j] += ref[j];
+    }
+  }
+}
+
+static void swap_mi_and_prev_mi(VP9_COMMON *cm) {
+  // Current mip will be the prev_mip for the next frame.
+  MODE_INFO *temp = cm->postproc_state.prev_mip;
+  cm->postproc_state.prev_mip = cm->mip;
+  cm->mip = temp;
+
+  // Update the upper left visible macroblock ptrs.
+  cm->mi = cm->mip + cm->mi_stride + 1;
+  cm->postproc_state.prev_mi = cm->postproc_state.prev_mip + cm->mi_stride + 1;
+}
+
+int vp9_post_proc_frame(struct VP9Common *cm,
+                        YV12_BUFFER_CONFIG *dest, vp9_ppflags_t *ppflags) {
+  const int q = MIN(105, cm->lf.filter_level * 2);
+  const int flags = ppflags->post_proc_flag;
+  YV12_BUFFER_CONFIG *const ppbuf = &cm->post_proc_buffer;
+  struct postproc_state *const ppstate = &cm->postproc_state;
+
+  if (!cm->frame_to_show)
+    return -1;
+
+  if (!flags) {
+    *dest = *cm->frame_to_show;
+    return 0;
+  }
+
+  vp9_clear_system_state();
+
+  // Alloc memory for prev_mip in the first frame.
+  if (cm->current_video_frame == 1) {
+    cm->postproc_state.last_base_qindex = cm->base_qindex;
+    cm->postproc_state.last_frame_valid = 1;
+    ppstate->prev_mip = vpx_calloc(cm->mi_alloc_size, sizeof(*cm->mip));
+    if (!ppstate->prev_mip) {
+      return 1;
+    }
+    ppstate->prev_mi = ppstate->prev_mip + cm->mi_stride + 1;
+    memset(ppstate->prev_mip, 0,
+           cm->mi_stride * (cm->mi_rows + 1) * sizeof(*cm->mip));
+  }
+
+  // Allocate post_proc_buffer_int if needed.
+  if ((flags & VP9D_MFQE) && !cm->post_proc_buffer_int.buffer_alloc) {
+    if ((flags & VP9D_DEMACROBLOCK) || (flags & VP9D_DEBLOCK)) {
+      const int width = ALIGN_POWER_OF_TWO(cm->width, 4);
+      const int height = ALIGN_POWER_OF_TWO(cm->height, 4);
+
+      if (vp9_alloc_frame_buffer(&cm->post_proc_buffer_int, width, height,
+                                 cm->subsampling_x, cm->subsampling_y,
+#if CONFIG_VP9_HIGHBITDEPTH
+                                 cm->use_highbitdepth,
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+                                 VP9_ENC_BORDER_IN_PIXELS,
+                                 cm->byte_alignment) < 0) {
+        vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
+                           "Failed to allocate MFQE framebuffer");
+      }
+
+      // Ensure that postproc is set to all 0s so that post proc
+      // doesn't pull random data in from edge.
+      memset(cm->post_proc_buffer_int.buffer_alloc, 128,
+             cm->post_proc_buffer.frame_size);
+    }
+  }
+
+  if (vp9_realloc_frame_buffer(&cm->post_proc_buffer, cm->width, cm->height,
+                               cm->subsampling_x, cm->subsampling_y,
+#if CONFIG_VP9_HIGHBITDEPTH
+                               cm->use_highbitdepth,
+#endif
+                               VP9_DEC_BORDER_IN_PIXELS, cm->byte_alignment,
+                               NULL, NULL, NULL) < 0)
+    vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
+                       "Failed to allocate post-processing buffer");
+
+  if ((flags & VP9D_MFQE) && cm->current_video_frame >= 2 &&
+      cm->postproc_state.last_frame_valid && cm->bit_depth == 8 &&
+      cm->postproc_state.last_base_qindex <= last_q_thresh &&
+      cm->base_qindex - cm->postproc_state.last_base_qindex >= q_diff_thresh) {
+    vp9_mfqe(cm);
+    // TODO(jackychen): Consider whether enable deblocking by default
+    // if mfqe is enabled. Need to take both the quality and the speed
+    // into consideration.
+    if ((flags & VP9D_DEMACROBLOCK) || (flags & VP9D_DEBLOCK)) {
+      vp8_yv12_copy_frame(ppbuf, &cm->post_proc_buffer_int);
+    }
+    if ((flags & VP9D_DEMACROBLOCK) && cm->post_proc_buffer_int.buffer_alloc) {
+      deblock_and_de_macro_block(&cm->post_proc_buffer_int, ppbuf,
+                                 q + (ppflags->deblocking_level - 5) * 10,
+                                 1, 0);
+    } else if (flags & VP9D_DEBLOCK) {
+      vp9_deblock(&cm->post_proc_buffer_int, ppbuf, q);
+    } else {
+      vp8_yv12_copy_frame(&cm->post_proc_buffer_int, ppbuf);
+    }
+  } else if (flags & VP9D_DEMACROBLOCK) {
+    deblock_and_de_macro_block(cm->frame_to_show, ppbuf,
+                               q + (ppflags->deblocking_level - 5) * 10, 1, 0);
+  } else if (flags & VP9D_DEBLOCK) {
+    vp9_deblock(cm->frame_to_show, ppbuf, q);
+  } else {
+    vp8_yv12_copy_frame(cm->frame_to_show, ppbuf);
+  }
+
+  cm->postproc_state.last_base_qindex = cm->base_qindex;
+  cm->postproc_state.last_frame_valid = 1;
+
+  if (flags & VP9D_ADDNOISE) {
+    const int noise_level = ppflags->noise_level;
+    if (ppstate->last_q != q ||
+        ppstate->last_noise != noise_level) {
+      fillrd(ppstate, 63 - q, noise_level);
+    }
+
+    vp9_plane_add_noise(ppbuf->y_buffer, ppstate->noise, ppstate->blackclamp,
+                        ppstate->whiteclamp, ppstate->bothclamp,
+                        ppbuf->y_width, ppbuf->y_height, ppbuf->y_stride);
+  }
+
+  *dest = *ppbuf;
+
+  /* handle problem with extending borders */
+  dest->y_width = cm->width;
+  dest->y_height = cm->height;
+  dest->uv_width = dest->y_width >> cm->subsampling_x;
+  dest->uv_height = dest->y_height >> cm->subsampling_y;
+
+  swap_mi_and_prev_mi(cm);
+  return 0;
+}
+#endif  // CONFIG_VP9_POSTPROC