libvpx: Add VP9 decoder.

source/libvpx/vp9/common/vp9_postproc.c

+/*
+ *  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 "vpx_ports/config.h"
+#include "vpx_scale/yv12config.h"
+#include "vp9/common/vp9_postproc.h"
+#include "vp9/common/vp9_textblit.h"
+#include "vpx_scale/vpxscale.h"
+#include "vp9/common/vp9_systemdependent.h"
+#include "./vp9_rtcd.h"
+#include "./vpx_scale_rtcd.h"
+
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#define RGB_TO_YUV(t)                                            \
+  ( (0.257*(float)(t >> 16))  + (0.504*(float)(t >> 8 & 0xff)) + \
+    (0.098*(float)(t & 0xff)) + 16),                             \
+  (-(0.148*(float)(t >> 16))  - (0.291*(float)(t >> 8 & 0xff)) + \
+    (0.439*(float)(t & 0xff)) + 128),                            \
+  ( (0.439*(float)(t >> 16))  - (0.368*(float)(t >> 8 & 0xff)) - \
+    (0.071*(float)(t & 0xff)) + 128)
+
+/* global constants */
+#if CONFIG_POSTPROC_VISUALIZER
+static const unsigned char MB_PREDICTION_MODE_colors[MB_MODE_COUNT][3] = {
+  { RGB_TO_YUV(0x98FB98) },   /* PaleGreen */
+  { RGB_TO_YUV(0x00FF00) },   /* Green */
+  { RGB_TO_YUV(0xADFF2F) },   /* GreenYellow */
+  { RGB_TO_YUV(0x8F0000) },   /* Dark Red */
+  { RGB_TO_YUV(0x008F8F) },   /* Dark Cyan */
+  { RGB_TO_YUV(0x008F8F) },   /* Dark Cyan */
+  { RGB_TO_YUV(0x008F8F) },   /* Dark Cyan */
+  { RGB_TO_YUV(0x8F0000) },   /* Dark Red */
+  { RGB_TO_YUV(0x8F0000) },   /* Dark Red */
+  { RGB_TO_YUV(0x228B22) },   /* ForestGreen */
+  { RGB_TO_YUV(0x006400) },   /* DarkGreen */
+  { RGB_TO_YUV(0x98F5FF) },   /* Cadet Blue */
+  { RGB_TO_YUV(0x6CA6CD) },   /* Sky Blue */
+  { RGB_TO_YUV(0x00008B) },   /* Dark blue */
+  { RGB_TO_YUV(0x551A8B) },   /* Purple */
+  { RGB_TO_YUV(0xFF0000) }    /* Red */
+  { RGB_TO_YUV(0xCC33FF) },   /* Magenta */
+};
+
+static const unsigned char B_PREDICTION_MODE_colors[B_MODE_COUNT][3] = {
+  { RGB_TO_YUV(0x6633ff) },   /* Purple */
+  { RGB_TO_YUV(0xcc33ff) },   /* Magenta */
+  { RGB_TO_YUV(0xff33cc) },   /* Pink */
+  { RGB_TO_YUV(0xff3366) },   /* Coral */
+  { RGB_TO_YUV(0x3366ff) },   /* Blue */
+  { RGB_TO_YUV(0xed00f5) },   /* Dark Blue */
+  { RGB_TO_YUV(0x2e00b8) },   /* Dark Purple */
+  { RGB_TO_YUV(0xff6633) },   /* Orange */
+  { RGB_TO_YUV(0x33ccff) },   /* Light Blue */
+  { RGB_TO_YUV(0x8ab800) },   /* Green */
+  { RGB_TO_YUV(0xffcc33) },   /* Light Orange */
+  { RGB_TO_YUV(0x33ffcc) },   /* Aqua */
+  { RGB_TO_YUV(0x66ff33) },   /* Light Green */
+  { RGB_TO_YUV(0xccff33) },   /* Yellow */
+};
+
+static const unsigned char MV_REFERENCE_FRAME_colors[MAX_REF_FRAMES][3] = {
+  { RGB_TO_YUV(0x00ff00) },   /* Blue */
+  { RGB_TO_YUV(0x0000ff) },   /* Green */
+  { RGB_TO_YUV(0xffff00) },   /* Yellow */
+  { RGB_TO_YUV(0xff0000) },   /* Red */
+};
+#endif
+
+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,
+};
+
+
+/****************************************************************************
+ */
+void vp9_post_proc_down_and_across_c(unsigned char *src_ptr,
+                                     unsigned char *dst_ptr,
+                                     int src_pixels_per_line,
+                                     int dst_pixels_per_line,
+                                     int rows,
+                                     int cols,
+                                     int flimit) {
+  unsigned char *p_src, *p_dst;
+  int row;
+  int col;
+  int i;
+  int v;
+  int pitch = src_pixels_per_line;
+  unsigned char 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++) {
+
+      int kernel = 4;
+      int 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++) {
+      int 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;
+  }
+}
+
+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(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 = 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;
+  }
+}
+
+void vp9_mbpost_proc_down_c(unsigned char *dst, int pitch,
+                            int rows, int cols, int flimit) {
+  int r, c, i;
+  const short *rv3 = &vp9_rv[63 & rand()];
+
+  for (c = 0; c < cols; c++) {
+    unsigned char *s = &dst[c];
+    int sumsq = 0;
+    int sum   = 0;
+    unsigned char 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;
+    }
+  }
+}
+
+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;
+
+  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);
+}
+
+void vp9_deblock(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;
+
+  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_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);
+}
+
+void vp9_de_noise(YV12_BUFFER_CONFIG         *src,
+                  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) post;
+  (void) low_var_thresh;
+  (void) flag;
+
+  vp9_post_proc_down_and_across(src->y_buffer + 2 * src->y_stride + 2,
+                                src->y_buffer + 2 * src->y_stride + 2,
+                                src->y_stride, src->y_stride, src->y_height - 4,
+                                src->y_width - 4, ppl);
+
+  vp9_post_proc_down_and_across(src->u_buffer + 2 * src->uv_stride + 2,
+                                src->u_buffer + 2 * src->uv_stride + 2,
+                                src->uv_stride, src->uv_stride,
+                                src->uv_height - 4, src->uv_width - 4, ppl);
+
+  vp9_post_proc_down_and_across(src->v_buffer + 2 * src->uv_stride + 2,
+                                src->v_buffer + 2 * src->uv_stride + 2,
+                                src->uv_stride, src->uv_stride,
+                                src->uv_height - 4, src->uv_width - 4, ppl);
+}
+
+double vp9_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.
+   */
+  {
+    double i;
+    int next, j;
+
+    next = 0;
+
+    for (i = -32; i < 32; i++) {
+      int a = (int)(.5 + 256 * vp9_gaussian(sigma, 0, i));
+
+      if (a) {
+        for (j = 0; j < a; j++) {
+          char_dist[next + j] = (char) i;
+        }
+
+        next = next + j;
+      }
+
+    }
+
+    for (next = next; next < 256; next++)
+      char_dist[next] = 0;
+  }
+
+  for (i = 0; i < 3072; i++) {
+    state->noise[i] = char_dist[rand() & 0xff];
+  }
+
+  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;
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : plane_add_noise_c
+ *
+ *  INPUTS        : unsigned char *Start  starting address of buffer to
+ *                                        add gaussian noise to
+ *                  unsigned int Width    width of plane
+ *                  unsigned int Height   height of plane
+ *                  int  Pitch    distance between subsequent lines of frame
+ *                  int  q        quantizer used to determine amount of noise
+ *                                  to add
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void.
+ *
+ *  FUNCTION      : adds gaussian noise to a plane of pixels
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+void vp9_plane_add_noise_c(unsigned char *Start, char *noise,
+                           char blackclamp[16],
+                           char whiteclamp[16],
+                           char bothclamp[16],
+                           unsigned int Width, unsigned int Height, int Pitch) {
+  unsigned int i, j;
+
+  for (i = 0; i < Height; i++) {
+    unsigned char *Pos = Start + i * Pitch;
+    char  *Ref = (char *)(noise + (rand() & 0xff));
+
+    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];
+    }
+  }
+}
+
+/* Blend the macro block with a solid colored square.  Leave the
+ * edges unblended to give distinction to macro blocks in areas
+ * filled with the same color block.
+ */
+void vp9_blend_mb_inner_c(unsigned char *y, unsigned char *u, unsigned char *v,
+                          int y1, int u1, int v1, int alpha, int stride) {
+  int i, j;
+  int y1_const = y1 * ((1 << 16) - alpha);
+  int u1_const = u1 * ((1 << 16) - alpha);
+  int v1_const = v1 * ((1 << 16) - alpha);
+
+  y += 2 * stride + 2;
+  for (i = 0; i < 12; i++) {
+    for (j = 0; j < 12; j++) {
+      y[j] = (y[j] * alpha + y1_const) >> 16;
+    }
+    y += stride;
+  }
+
+  stride >>= 1;
+
+  u += stride + 1;
+  v += stride + 1;
+
+  for (i = 0; i < 6; i++) {
+    for (j = 0; j < 6; j++) {
+      u[j] = (u[j] * alpha + u1_const) >> 16;
+      v[j] = (v[j] * alpha + v1_const) >> 16;
+    }
+    u += stride;
+    v += stride;
+  }
+}
+
+/* Blend only the edge of the macro block.  Leave center
+ * unblended to allow for other visualizations to be layered.
+ */
+void vp9_blend_mb_outer_c(unsigned char *y, unsigned char *u, unsigned char *v,
+                          int y1, int u1, int v1, int alpha, int stride) {
+  int i, j;
+  int y1_const = y1 * ((1 << 16) - alpha);
+  int u1_const = u1 * ((1 << 16) - alpha);
+  int v1_const = v1 * ((1 << 16) - alpha);
+
+  for (i = 0; i < 2; i++) {
+    for (j = 0; j < 16; j++) {
+      y[j] = (y[j] * alpha + y1_const) >> 16;
+    }
+    y += stride;
+  }
+
+  for (i = 0; i < 12; i++) {
+    y[0]  = (y[0] * alpha  + y1_const) >> 16;
+    y[1]  = (y[1] * alpha  + y1_const) >> 16;
+    y[14] = (y[14] * alpha + y1_const) >> 16;
+    y[15] = (y[15] * alpha + y1_const) >> 16;
+    y += stride;
+  }
+
+  for (i = 0; i < 2; i++) {
+    for (j = 0; j < 16; j++) {
+      y[j] = (y[j] * alpha + y1_const) >> 16;
+    }
+    y += stride;
+  }
+
+  stride >>= 1;
+
+  for (j = 0; j < 8; j++) {
+    u[j] = (u[j] * alpha + u1_const) >> 16;
+    v[j] = (v[j] * alpha + v1_const) >> 16;
+  }
+  u += stride;
+  v += stride;
+
+  for (i = 0; i < 6; i++) {
+    u[0] = (u[0] * alpha + u1_const) >> 16;
+    v[0] = (v[0] * alpha + v1_const) >> 16;
+
+    u[7] = (u[7] * alpha + u1_const) >> 16;
+    v[7] = (v[7] * alpha + v1_const) >> 16;
+
+    u += stride;
+    v += stride;
+  }
+
+  for (j = 0; j < 8; j++) {
+    u[j] = (u[j] * alpha + u1_const) >> 16;
+    v[j] = (v[j] * alpha + v1_const) >> 16;
+  }
+}
+
+void vp9_blend_b_c(unsigned char *y, unsigned char *u, unsigned char *v,
+                   int y1, int u1, int v1, int alpha, int stride) {
+  int i, j;
+  int y1_const = y1 * ((1 << 16) - alpha);
+  int u1_const = u1 * ((1 << 16) - alpha);
+  int v1_const = v1 * ((1 << 16) - alpha);
+
+  for (i = 0; i < 4; i++) {
+    for (j = 0; j < 4; j++) {
+      y[j] = (y[j] * alpha + y1_const) >> 16;
+    }
+    y += stride;
+  }
+
+  stride >>= 1;
+
+  for (i = 0; i < 2; i++) {
+    for (j = 0; j < 2; j++) {
+      u[j] = (u[j] * alpha + u1_const) >> 16;
+      v[j] = (v[j] * alpha + v1_const) >> 16;
+    }
+    u += stride;
+    v += stride;
+  }
+}
+
+static void constrain_line(int x0, int *x1, int y0, int *y1,
+                           int width, int height) {
+  int dx;
+  int dy;
+
+  if (*x1 > width) {
+    dx = *x1 - x0;
+    dy = *y1 - y0;
+
+    *x1 = width;
+    if (dx)
+      *y1 = ((width - x0) * dy) / dx + y0;
+  }
+  if (*x1 < 0) {
+    dx = *x1 - x0;
+    dy = *y1 - y0;
+
+    *x1 = 0;
+    if (dx)
+      *y1 = ((0 - x0) * dy) / dx + y0;
+  }
+  if (*y1 > height) {
+    dx = *x1 - x0;
+    dy = *y1 - y0;
+
+    *y1 = height;
+    if (dy)
+      *x1 = ((height - y0) * dx) / dy + x0;
+  }
+  if (*y1 < 0) {
+    dx = *x1 - x0;
+    dy = *y1 - y0;
+
+    *y1 = 0;
+    if (dy)
+      *x1 = ((0 - y0) * dx) / dy + x0;
+  }
+}
+
+int vp9_post_proc_frame(VP9_COMMON *oci, YV12_BUFFER_CONFIG *dest,
+                        vp9_ppflags_t *ppflags) {
+  int q = oci->filter_level * 10 / 6;
+  int flags = ppflags->post_proc_flag;
+  int deblock_level = ppflags->deblocking_level;
+  int noise_level = ppflags->noise_level;
+
+  if (!oci->frame_to_show)
+    return -1;
+
+  if (q > 63)
+    q = 63;
+
+  if (!flags) {
+    *dest = *oci->frame_to_show;
+
+    /* handle problem with extending borders */
+    dest->y_width = oci->Width;
+    dest->y_height = oci->Height;
+    dest->uv_height = dest->y_height / 2;
+    return 0;
+
+  }
+
+#if ARCH_X86||ARCH_X86_64
+  vpx_reset_mmx_state();
+#endif
+
+  if (flags & VP9D_DEMACROBLOCK) {
+    deblock_and_de_macro_block(oci->frame_to_show, &oci->post_proc_buffer,
+                               q + (deblock_level - 5) * 10, 1, 0);
+  } else if (flags & VP9D_DEBLOCK) {
+    vp9_deblock(oci->frame_to_show, &oci->post_proc_buffer, q, 1, 0);
+  } else {
+    vp8_yv12_copy_frame(oci->frame_to_show, &oci->post_proc_buffer);
+  }
+
+  if (flags & VP9D_ADDNOISE) {
+    if (oci->postproc_state.last_q != q
+        || oci->postproc_state.last_noise != noise_level) {
+      fillrd(&oci->postproc_state, 63 - q, noise_level);
+    }
+
+    vp9_plane_add_noise(oci->post_proc_buffer.y_buffer,
+                        oci->postproc_state.noise,
+                        oci->postproc_state.blackclamp,
+                        oci->postproc_state.whiteclamp,
+                        oci->postproc_state.bothclamp,
+                        oci->post_proc_buffer.y_width,
+                        oci->post_proc_buffer.y_height,
+                        oci->post_proc_buffer.y_stride);
+  }
+
+#if CONFIG_POSTPROC_VISUALIZER
+  if (flags & VP9D_DEBUG_TXT_FRAME_INFO) {
+    char message[512];
+    sprintf(message, "F%1dG%1dQ%3dF%3dP%d_s%dx%d",
+            (oci->frame_type == KEY_FRAME),
+            oci->refresh_golden_frame,
+            oci->base_qindex,
+            oci->filter_level,
+            flags,
+            oci->mb_cols, oci->mb_rows);
+    vp9_blit_text(message, oci->post_proc_buffer.y_buffer,
+                  oci->post_proc_buffer.y_stride);
+  }
+
+  if (flags & VP9D_DEBUG_TXT_MBLK_MODES) {
+    int i, j;
+    unsigned char *y_ptr;
+    YV12_BUFFER_CONFIG *post = &oci->post_proc_buffer;
+    int mb_rows = post->y_height >> 4;
+    int mb_cols = post->y_width  >> 4;
+    int mb_index = 0;
+    MODE_INFO *mi = oci->mi;
+
+    y_ptr = post->y_buffer + 4 * post->y_stride + 4;
+
+    /* vp9_filter each macro block */
+    for (i = 0; i < mb_rows; i++) {
+      for (j = 0; j < mb_cols; j++) {
+        char zz[4];
+
+        sprintf(zz, "%c", mi[mb_index].mbmi.mode + 'a');
+
+        vp9_blit_text(zz, y_ptr, post->y_stride);
+        mb_index++;
+        y_ptr += 16;
+      }
+
+      mb_index++; /* border */
+      y_ptr += post->y_stride  * 16 - post->y_width;
+
+    }
+  }
+
+  if (flags & VP9D_DEBUG_TXT_DC_DIFF) {
+    int i, j;
+    unsigned char *y_ptr;
+    YV12_BUFFER_CONFIG *post = &oci->post_proc_buffer;
+    int mb_rows = post->y_height >> 4;
+    int mb_cols = post->y_width  >> 4;
+    int mb_index = 0;
+    MODE_INFO *mi = oci->mi;
+
+    y_ptr = post->y_buffer + 4 * post->y_stride + 4;
+
+    /* vp9_filter each macro block */
+    for (i = 0; i < mb_rows; i++) {
+      for (j = 0; j < mb_cols; j++) {
+        char zz[4];
+        int dc_diff = !(mi[mb_index].mbmi.mode != B_PRED &&
+                        mi[mb_index].mbmi.mode != SPLITMV &&
+                        mi[mb_index].mbmi.mb_skip_coeff);
+
+        if (oci->frame_type == KEY_FRAME)
+          sprintf(zz, "a");
+        else
+          sprintf(zz, "%c", dc_diff + '0');
+
+        vp9_blit_text(zz, y_ptr, post->y_stride);
+        mb_index++;
+        y_ptr += 16;
+      }
+
+      mb_index++; /* border */
+      y_ptr += post->y_stride  * 16 - post->y_width;
+
+    }
+  }
+
+  if (flags & VP9D_DEBUG_TXT_RATE_INFO) {
+    char message[512];
+    snprintf(message, sizeof(message),
+             "Bitrate: %10.2f frame_rate: %10.2f ",
+             oci->bitrate, oci->framerate);
+    vp9_blit_text(message, oci->post_proc_buffer.y_buffer,
+                  oci->post_proc_buffer.y_stride);
+  }
+
+  /* Draw motion vectors */
+  if ((flags & VP9D_DEBUG_DRAW_MV) && ppflags->display_mv_flag) {
+    YV12_BUFFER_CONFIG *post = &oci->post_proc_buffer;
+    int width  = post->y_width;
+    int height = post->y_height;
+    unsigned char *y_buffer = oci->post_proc_buffer.y_buffer;
+    int y_stride = oci->post_proc_buffer.y_stride;
+    MODE_INFO *mi = oci->mi;
+    int x0, y0;
+
+    for (y0 = 0; y0 < height; y0 += 16) {
+      for (x0 = 0; x0 < width; x0 += 16) {
+        int x1, y1;
+
+        if (!(ppflags->display_mv_flag & (1 << mi->mbmi.mode))) {
+          mi++;
+          continue;
+        }
+
+        if (mi->mbmi.mode == SPLITMV) {
+          switch (mi->mbmi.partitioning) {
+            case PARTITIONING_16X8 : {  /* mv_top_bottom */
+              union b_mode_info *bmi = &mi->bmi[0];
+              MV *mv = &bmi->mv.as_mv;
+
+              x1 = x0 + 8 + (mv->col >> 3);
+              y1 = y0 + 4 + (mv->row >> 3);
+
+              constrain_line(x0 + 8, &x1, y0 + 4, &y1, width, height);
+              vp9_blit_line(x0 + 8,  x1, y0 + 4,  y1, y_buffer, y_stride);
+
+              bmi = &mi->bmi[8];
+
+              x1 = x0 + 8 + (mv->col >> 3);
+              y1 = y0 + 12 + (mv->row >> 3);
+
+              constrain_line(x0 + 8, &x1, y0 + 12, &y1, width, height);
+              vp9_blit_line(x0 + 8,  x1, y0 + 12,  y1, y_buffer, y_stride);
+
+              break;
+            }
+            case PARTITIONING_8X16 : {  /* mv_left_right */
+              union b_mode_info *bmi = &mi->bmi[0];
+              MV *mv = &bmi->mv.as_mv;
+
+              x1 = x0 + 4 + (mv->col >> 3);
+              y1 = y0 + 8 + (mv->row >> 3);
+
+              constrain_line(x0 + 4, &x1, y0 + 8, &y1, width, height);
+              vp9_blit_line(x0 + 4,  x1, y0 + 8,  y1, y_buffer, y_stride);
+
+              bmi = &mi->bmi[2];
+
+              x1 = x0 + 12 + (mv->col >> 3);
+              y1 = y0 + 8 + (mv->row >> 3);
+
+              constrain_line(x0 + 12, &x1, y0 + 8, &y1, width, height);
+              vp9_blit_line(x0 + 12,  x1, y0 + 8,  y1, y_buffer, y_stride);
+
+              break;
+            }
+            case PARTITIONING_8X8 : {  /* mv_quarters   */
+              union b_mode_info *bmi = &mi->bmi[0];
+              MV *mv = &bmi->mv.as_mv;
+
+              x1 = x0 + 4 + (mv->col >> 3);
+              y1 = y0 + 4 + (mv->row >> 3);
+
+              constrain_line(x0 + 4, &x1, y0 + 4, &y1, width, height);
+              vp9_blit_line(x0 + 4,  x1, y0 + 4,  y1, y_buffer, y_stride);
+
+              bmi = &mi->bmi[2];
+
+              x1 = x0 + 12 + (mv->col >> 3);
+              y1 = y0 + 4 + (mv->row >> 3);
+
+              constrain_line(x0 + 12, &x1, y0 + 4, &y1, width, height);
+              vp9_blit_line(x0 + 12,  x1, y0 + 4,  y1, y_buffer, y_stride);
+
+              bmi = &mi->bmi[8];
+
+              x1 = x0 + 4 + (mv->col >> 3);
+              y1 = y0 + 12 + (mv->row >> 3);
+
+              constrain_line(x0 + 4, &x1, y0 + 12, &y1, width, height);
+              vp9_blit_line(x0 + 4,  x1, y0 + 12,  y1, y_buffer, y_stride);
+
+              bmi = &mi->bmi[10];
+
+              x1 = x0 + 12 + (mv->col >> 3);
+              y1 = y0 + 12 + (mv->row >> 3);
+
+              constrain_line(x0 + 12, &x1, y0 + 12, &y1, width, height);
+              vp9_blit_line(x0 + 12,  x1, y0 + 12,  y1, y_buffer, y_stride);
+              break;
+            }
+            case PARTITIONING_4X4:
+            default : {
+              union b_mode_info *bmi = mi->bmi;
+              int bx0, by0;
+
+              for (by0 = y0; by0 < (y0 + 16); by0 += 4) {
+                for (bx0 = x0; bx0 < (x0 + 16); bx0 += 4) {
+                  MV *mv = &bmi->mv.as_mv;
+
+                  x1 = bx0 + 2 + (mv->col >> 3);
+                  y1 = by0 + 2 + (mv->row >> 3);
+
+                  constrain_line(bx0 + 2, &x1, by0 + 2, &y1, width, height);
+                  vp9_blit_line(bx0 + 2,  x1, by0 + 2,  y1, y_buffer, y_stride);
+
+                  bmi++;
+                }
+              }
+            }
+          }
+        } else if (mi->mbmi.mode >= NEARESTMV) {
+          MV *mv = &mi->mbmi.mv.as_mv;
+          const int lx0 = x0 + 8;
+          const int ly0 = y0 + 8;
+
+          x1 = lx0 + (mv->col >> 3);
+          y1 = ly0 + (mv->row >> 3);
+
+          if (x1 != lx0 && y1 != ly0) {
+            constrain_line(lx0, &x1, ly0 - 1, &y1, width, height);
+            vp9_blit_line(lx0,  x1, ly0 - 1,  y1, y_buffer, y_stride);
+
+            constrain_line(lx0, &x1, ly0 + 1, &y1, width, height);
+            vp9_blit_line(lx0,  x1, ly0 + 1,  y1, y_buffer, y_stride);
+          } else
+            vp9_blit_line(lx0,  x1, ly0,  y1, y_buffer, y_stride);
+        }
+
+        mi++;
+      }
+      mi++;
+    }
+  }
+
+  /* Color in block modes */
+  if ((flags & VP9D_DEBUG_CLR_BLK_MODES)
+      && (ppflags->display_mb_modes_flag || ppflags->display_b_modes_flag)) {
+    int y, x;
+    YV12_BUFFER_CONFIG *post = &oci->post_proc_buffer;
+    int width  = post->y_width;
+    int height = post->y_height;
+    unsigned char *y_ptr = oci->post_proc_buffer.y_buffer;
+    unsigned char *u_ptr = oci->post_proc_buffer.u_buffer;
+    unsigned char *v_ptr = oci->post_proc_buffer.v_buffer;
+    int y_stride = oci->post_proc_buffer.y_stride;
+    MODE_INFO *mi = oci->mi;
+
+    for (y = 0; y < height; y += 16) {
+      for (x = 0; x < width; x += 16) {
+        int Y = 0, U = 0, V = 0;
+
+        if (mi->mbmi.mode == B_PRED &&
+            ((ppflags->display_mb_modes_flag & B_PRED) ||
+             ppflags->display_b_modes_flag)) {
+          int by, bx;
+          unsigned char *yl, *ul, *vl;
+          union b_mode_info *bmi = mi->bmi;
+
+          yl = y_ptr + x;
+          ul = u_ptr + (x >> 1);
+          vl = v_ptr + (x >> 1);
+
+          for (by = 0; by < 16; by += 4) {
+            for (bx = 0; bx < 16; bx += 4) {
+              if ((ppflags->display_b_modes_flag & (1 << mi->mbmi.mode))
+                  || (ppflags->display_mb_modes_flag & B_PRED)) {
+                Y = B_PREDICTION_MODE_colors[bmi->as_mode.first][0];
+                U = B_PREDICTION_MODE_colors[bmi->as_mode.first][1];
+                V = B_PREDICTION_MODE_colors[bmi->as_mode.first][2];
+
+                vp9_blend_b(yl + bx, ul + (bx >> 1), vl + (bx >> 1), Y, U, V,
+                    0xc000, y_stride);
+              }
+              bmi++;
+            }
+
+            yl += y_stride * 4;
+            ul += y_stride * 1;
+            vl += y_stride * 1;
+          }
+        } else if (ppflags->display_mb_modes_flag & (1 << mi->mbmi.mode)) {
+          Y = MB_PREDICTION_MODE_colors[mi->mbmi.mode][0];
+          U = MB_PREDICTION_MODE_colors[mi->mbmi.mode][1];
+          V = MB_PREDICTION_MODE_colors[mi->mbmi.mode][2];
+
+          vp9_blend_mb_inner(y_ptr + x, u_ptr + (x >> 1), v_ptr + (x >> 1),
+                             Y, U, V, 0xc000, y_stride);
+        }
+
+        mi++;
+      }
+      y_ptr += y_stride * 16;
+      u_ptr += y_stride * 4;
+      v_ptr += y_stride * 4;
+
+      mi++;
+    }
+  }
+
+  /* Color in frame reference blocks */
+  if ((flags & VP9D_DEBUG_CLR_FRM_REF_BLKS) &&
+      ppflags->display_ref_frame_flag) {
+    int y, x;
+    YV12_BUFFER_CONFIG *post = &oci->post_proc_buffer;
+    int width  = post->y_width;
+    int height = post->y_height;
+    unsigned char *y_ptr = oci->post_proc_buffer.y_buffer;
+    unsigned char *u_ptr = oci->post_proc_buffer.u_buffer;
+    unsigned char *v_ptr = oci->post_proc_buffer.v_buffer;
+    int y_stride = oci->post_proc_buffer.y_stride;
+    MODE_INFO *mi = oci->mi;
+
+    for (y = 0; y < height; y += 16) {
+      for (x = 0; x < width; x += 16) {
+        int Y = 0, U = 0, V = 0;
+
+        if (ppflags->display_ref_frame_flag & (1 << mi->mbmi.ref_frame)) {
+          Y = MV_REFERENCE_FRAME_colors[mi->mbmi.ref_frame][0];
+          U = MV_REFERENCE_FRAME_colors[mi->mbmi.ref_frame][1];
+          V = MV_REFERENCE_FRAME_colors[mi->mbmi.ref_frame][2];
+
+          vp9_blend_mb_outer(y_ptr + x, u_ptr + (x >> 1), v_ptr + (x >> 1),
+                             Y, U, V, 0xc000, y_stride);
+        }
+
+        mi++;
+      }
+      y_ptr += y_stride * 16;
+      u_ptr += y_stride * 4;
+      v_ptr += y_stride * 4;
+
+      mi++;
+    }
+  }
+#endif
+
+  *dest = oci->post_proc_buffer;
+
+  /* handle problem with extending borders */
+  dest->y_width = oci->Width;
+  dest->y_height = oci->Height;
+  dest->uv_height = dest->y_height / 2;
+
+  return 0;
+}