ref: 10783d4f3a6188a01f9a993c56ab0013acd97214
dir: /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 <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"
#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,
};
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;
int col;
int i;
int v;
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++) {
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(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;
}
}
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;
}
}
}
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(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)
vp9_post_proc_down_and_across(srcs[i], dsts[i],
src_strides[i], dst_strides[i],
src_heights[i], src_widths[i], ppl);
}
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 uint8_t *const src = srcs[i] + 2 * src_stride + 2;
const int src_width = src_widths[i] - 4;
const int src_height = src_heights[i] - 4;
const int dst_stride = dst_strides[i];
uint8_t *const dst = dsts[i] + 2 * dst_stride + 2;
vp9_post_proc_down_and_across(src, dst, src_stride, dst_stride,
src_height, src_width, ppl);
}
}
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.
*/
{
double i;
int next, j;
next = 0;
for (i = -32; i < 32; i++) {
int a = (int)(0.5 + 256 * gaussian(sigma, 0, i));
if (a) {
for (j = 0; j < a; 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];
}
}
}
int vp9_post_proc_frame(struct VP9Common *cm,
YV12_BUFFER_CONFIG *dest, vp9_ppflags_t *ppflags) {
const int q = MIN(63, cm->lf.filter_level * 10 / 6);
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();
#if CONFIG_VP9_POSTPROC || CONFIG_INTERNAL_STATS
if (vp9_realloc_frame_buffer(&cm->post_proc_buffer, cm->width, cm->height,
cm->subsampling_x, cm->subsampling_y,
VP9_DEC_BORDER_IN_PIXELS, NULL, NULL, NULL) < 0)
vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate post-processing buffer");
#endif
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);
}
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;
return 0;
}
#endif