ref: ca9a262b1d7272a32da60273dbc607d0f54e0262
dir: 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 <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "./vpx_dsp_rtcd.h"
#include "./vpx_config.h"
#include "./vpx_scale_rtcd.h"
#include "./vp9_rtcd.h"
#include "vpx_dsp/vpx_dsp_common.h"
#include "vpx_dsp/postproc.h"
#include "vpx_ports/mem.h"
#include "vpx_ports/system_state.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"
#if CONFIG_VP9_POSTPROC
static const uint8_t q_diff_thresh = 20;
static const uint8_t last_q_thresh = 170;
extern const int16_t vpx_rv[];
#if CONFIG_VP9_HIGHBITDEPTH
static const int16_t kernel5[] = { 1, 1, 4, 1, 1 };
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;
}
#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
#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 = &vpx_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(VP9_COMMON *cm,
YV12_BUFFER_CONFIG *source,
YV12_BUFFER_CONFIG *post, int q,
int low_var_thresh, int flag,
uint8_t *limits) {
(void)low_var_thresh;
(void)flag;
#if CONFIG_VP9_HIGHBITDEPTH
if (source->flags & YV12_FLAG_HIGHBITDEPTH) {
double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
int ppl = (int)(level + .5);
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 {
#endif // CONFIG_VP9_HIGHBITDEPTH
vp9_deblock(cm, source, post, q, limits);
vpx_mbpost_proc_across_ip(post->y_buffer, post->y_stride, post->y_height,
post->y_width, q2mbl(q));
vpx_mbpost_proc_down(post->y_buffer, post->y_stride, post->y_height,
post->y_width, q2mbl(q));
#if CONFIG_VP9_HIGHBITDEPTH
}
#endif // CONFIG_VP9_HIGHBITDEPTH
}
void vp9_deblock(struct VP9Common *cm, const YV12_BUFFER_CONFIG *src,
YV12_BUFFER_CONFIG *dst, int q, uint8_t *limits) {
const int ppl =
(int)(6.0e-05 * q * q * q - 0.0067 * q * q + 0.306 * q + 0.0065 + 0.5);
#if CONFIG_VP9_HIGHBITDEPTH
if (src->flags & YV12_FLAG_HIGHBITDEPTH) {
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_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 {
#endif // CONFIG_VP9_HIGHBITDEPTH
int mbr;
const int mb_rows = cm->mb_rows;
const int mb_cols = cm->mb_cols;
memset(limits, (unsigned char)ppl, 16 * mb_cols);
for (mbr = 0; mbr < mb_rows; mbr++) {
vpx_post_proc_down_and_across_mb_row(
src->y_buffer + 16 * mbr * src->y_stride,
dst->y_buffer + 16 * mbr * dst->y_stride, src->y_stride,
dst->y_stride, src->y_width, limits, 16);
vpx_post_proc_down_and_across_mb_row(
src->u_buffer + 8 * mbr * src->uv_stride,
dst->u_buffer + 8 * mbr * dst->uv_stride, src->uv_stride,
dst->uv_stride, src->uv_width, limits, 8);
vpx_post_proc_down_and_across_mb_row(
src->v_buffer + 8 * mbr * src->uv_stride,
dst->v_buffer + 8 * mbr * dst->uv_stride, src->uv_stride,
dst->uv_stride, src->uv_width, limits, 8);
}
#if CONFIG_VP9_HIGHBITDEPTH
}
#endif // CONFIG_VP9_HIGHBITDEPTH
}
void vp9_denoise(struct VP9Common *cm, const YV12_BUFFER_CONFIG *src,
YV12_BUFFER_CONFIG *dst, int q, uint8_t *limits) {
vp9_deblock(cm, src, dst, q, limits);
}
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, int unscaled_width) {
const int q = VPXMIN(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;
}
vpx_clear_system_state();
// Alloc memory for prev_mip in the first frame.
if (cm->current_video_frame == 1) {
ppstate->last_base_qindex = cm->base_qindex;
ppstate->last_frame_valid = 1;
}
if ((flags & VP9D_MFQE) && ppstate->prev_mip == NULL) {
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;
}
// 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 (vpx_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 (vpx_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_DEMACROBLOCK | VP9D_DEBLOCK)) {
if (!cm->postproc_state.limits) {
cm->postproc_state.limits =
vpx_calloc(unscaled_width, sizeof(*cm->postproc_state.limits));
}
}
if (flags & VP9D_ADDNOISE) {
if (!cm->postproc_state.generated_noise) {
cm->postproc_state.generated_noise = vpx_calloc(
cm->width + 256, sizeof(*cm->postproc_state.generated_noise));
if (!cm->postproc_state.generated_noise) return 1;
}
}
if ((flags & VP9D_MFQE) && cm->current_video_frame >= 2 &&
ppstate->last_frame_valid && cm->bit_depth == 8 &&
ppstate->last_base_qindex <= last_q_thresh &&
cm->base_qindex - ppstate->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)) {
vpx_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, &cm->post_proc_buffer_int, ppbuf,
q + (ppflags->deblocking_level - 5) * 10, 1, 0,
cm->postproc_state.limits);
} else if (flags & VP9D_DEBLOCK) {
vp9_deblock(cm, &cm->post_proc_buffer_int, ppbuf, q,
cm->postproc_state.limits);
} else {
vpx_yv12_copy_frame(&cm->post_proc_buffer_int, ppbuf);
}
} else if (flags & VP9D_DEMACROBLOCK) {
deblock_and_de_macro_block(cm, cm->frame_to_show, ppbuf,
q + (ppflags->deblocking_level - 5) * 10, 1, 0,
cm->postproc_state.limits);
} else if (flags & VP9D_DEBLOCK) {
vp9_deblock(cm, cm->frame_to_show, ppbuf, q, cm->postproc_state.limits);
} else {
vpx_yv12_copy_frame(cm->frame_to_show, ppbuf);
}
ppstate->last_base_qindex = cm->base_qindex;
ppstate->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) {
double sigma;
vpx_clear_system_state();
sigma = noise_level + .5 + .6 * q / 63.0;
ppstate->clamp =
vpx_setup_noise(sigma, ppstate->generated_noise, cm->width + 256);
ppstate->last_q = q;
ppstate->last_noise = noise_level;
}
vpx_plane_add_noise(ppbuf->y_buffer, ppstate->generated_noise,
ppstate->clamp, ppstate->clamp, 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;
if (flags & VP9D_MFQE) swap_mi_and_prev_mi(cm);
return 0;
}
#endif // CONFIG_VP9_POSTPROC