ref: a0944ba19fb4969fc6b3a55c7189a482a9cd3e4f
dir: /vp8/common/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_config.h"
#include "vpx_dsp_rtcd.h"
#include "vp8_rtcd.h"
#include "vpx_dsp/postproc.h"
#include "vpx_ports/system_state.h"
#include "vpx_scale_rtcd.h"
#include "vpx_scale/yv12config.h"
#include "postproc.h"
#include "common.h"
#include "vpx_scale/vpx_scale.h"
#include "systemdependent.h"
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
/* clang-format off */
#define RGB_TO_YUV(t) \
(unsigned char)((0.257 * (float)(t >> 16)) + \
(0.504 * (float)(t >> 8 & 0xff)) + \
(0.098 * (float)(t & 0xff)) + 16), \
(unsigned char)(-(0.148 * (float)(t >> 16)) - \
(0.291 * (float)(t >> 8 & 0xff)) + \
(0.439 * (float)(t & 0xff)) + 128), \
(unsigned char)((0.439 * (float)(t >> 16)) - \
(0.368 * (float)(t >> 8 & 0xff)) - \
(0.071 * (float)(t & 0xff)) + 128)
/* clang-format on */
extern void vp8_blit_text(const char *msg, unsigned char *address,
const int pitch);
extern void vp8_blit_line(int x0, int x1, int y0, int y1, unsigned char *image,
const int pitch);
/***********************************************************************************************************
*/
#if CONFIG_POSTPROC
static int q2mbl(int x) {
if (x < 20) x = 20;
x = 50 + (x - 50) * 10 / 8;
return x * x / 3;
}
static void vp8_de_mblock(YV12_BUFFER_CONFIG *post, int q) {
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));
}
void vp8_deblock(VP8_COMMON *cm, 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);
const MODE_INFO *mode_info_context = cm->mi;
int mbr, mbc;
/* The pixel thresholds are adjusted according to if or not the macroblock
* is a skipped block. */
unsigned char *ylimits = cm->pp_limits_buffer;
unsigned char *uvlimits = cm->pp_limits_buffer + 16 * cm->mb_cols;
(void)low_var_thresh;
(void)flag;
if (ppl > 0) {
for (mbr = 0; mbr < cm->mb_rows; ++mbr) {
unsigned char *ylptr = ylimits;
unsigned char *uvlptr = uvlimits;
for (mbc = 0; mbc < cm->mb_cols; ++mbc) {
unsigned char mb_ppl;
if (mode_info_context->mbmi.mb_skip_coeff) {
mb_ppl = (unsigned char)ppl >> 1;
} else {
mb_ppl = (unsigned char)ppl;
}
memset(ylptr, mb_ppl, 16);
memset(uvlptr, mb_ppl, 8);
ylptr += 16;
uvlptr += 8;
mode_info_context++;
}
mode_info_context++;
vpx_post_proc_down_and_across_mb_row(
source->y_buffer + 16 * mbr * source->y_stride,
post->y_buffer + 16 * mbr * post->y_stride, source->y_stride,
post->y_stride, source->y_width, ylimits, 16);
vpx_post_proc_down_and_across_mb_row(
source->u_buffer + 8 * mbr * source->uv_stride,
post->u_buffer + 8 * mbr * post->uv_stride, source->uv_stride,
post->uv_stride, source->uv_width, uvlimits, 8);
vpx_post_proc_down_and_across_mb_row(
source->v_buffer + 8 * mbr * source->uv_stride,
post->v_buffer + 8 * mbr * post->uv_stride, source->uv_stride,
post->uv_stride, source->uv_width, uvlimits, 8);
}
} else {
vp8_yv12_copy_frame(source, post);
}
}
void vp8_de_noise(VP8_COMMON *cm, YV12_BUFFER_CONFIG *source,
YV12_BUFFER_CONFIG *post, int q, int low_var_thresh, int flag,
int uvfilter) {
int mbr;
double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
int ppl = (int)(level + .5);
int mb_rows = cm->mb_rows;
int mb_cols = cm->mb_cols;
unsigned char *limits = cm->pp_limits_buffer;
(void)post;
(void)low_var_thresh;
(void)flag;
memset(limits, (unsigned char)ppl, 16 * mb_cols);
/* TODO: The original code don't filter the 2 outer rows and columns. */
for (mbr = 0; mbr < mb_rows; ++mbr) {
vpx_post_proc_down_and_across_mb_row(
source->y_buffer + 16 * mbr * source->y_stride,
source->y_buffer + 16 * mbr * source->y_stride, source->y_stride,
source->y_stride, source->y_width, limits, 16);
if (uvfilter == 1) {
vpx_post_proc_down_and_across_mb_row(
source->u_buffer + 8 * mbr * source->uv_stride,
source->u_buffer + 8 * mbr * source->uv_stride, source->uv_stride,
source->uv_stride, source->uv_width, limits, 8);
vpx_post_proc_down_and_across_mb_row(
source->v_buffer + 8 * mbr * source->uv_stride,
source->v_buffer + 8 * mbr * source->uv_stride, source->uv_stride,
source->uv_stride, source->uv_width, limits, 8);
}
}
}
#endif // CONFIG_POSTPROC
#if CONFIG_POSTPROC
int vp8_post_proc_frame(VP8_COMMON *oci, YV12_BUFFER_CONFIG *dest,
vp8_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;
oci->postproc_state.last_base_qindex = oci->base_qindex;
oci->postproc_state.last_frame_valid = 1;
return 0;
}
if (flags & VP8D_ADDNOISE) {
if (!oci->postproc_state.generated_noise) {
oci->postproc_state.generated_noise = vpx_calloc(
oci->Width + 256, sizeof(*oci->postproc_state.generated_noise));
if (!oci->postproc_state.generated_noise) return 1;
}
}
/* Allocate post_proc_buffer_int if needed */
if ((flags & VP8D_MFQE) && !oci->post_proc_buffer_int_used) {
if ((flags & VP8D_DEBLOCK) || (flags & VP8D_DEMACROBLOCK)) {
int width = (oci->Width + 15) & ~15;
int height = (oci->Height + 15) & ~15;
if (vp8_yv12_alloc_frame_buffer(&oci->post_proc_buffer_int, width, height,
VP8BORDERINPIXELS)) {
vpx_internal_error(&oci->error, VPX_CODEC_MEM_ERROR,
"Failed to allocate MFQE framebuffer");
}
oci->post_proc_buffer_int_used = 1;
/* insure that postproc is set to all 0's so that post proc
* doesn't pull random data in from edge
*/
memset((&oci->post_proc_buffer_int)->buffer_alloc, 128,
(&oci->post_proc_buffer)->frame_size);
}
}
vpx_clear_system_state();
if ((flags & VP8D_MFQE) && oci->postproc_state.last_frame_valid &&
oci->current_video_frame > 10 &&
oci->postproc_state.last_base_qindex < 60 &&
oci->base_qindex - oci->postproc_state.last_base_qindex >= 20) {
vp8_multiframe_quality_enhance(oci);
if (((flags & VP8D_DEBLOCK) || (flags & VP8D_DEMACROBLOCK)) &&
oci->post_proc_buffer_int_used) {
vp8_yv12_copy_frame(&oci->post_proc_buffer, &oci->post_proc_buffer_int);
if (flags & VP8D_DEMACROBLOCK) {
vp8_deblock(oci, &oci->post_proc_buffer_int, &oci->post_proc_buffer,
q + (deblock_level - 5) * 10, 1, 0);
vp8_de_mblock(&oci->post_proc_buffer, q + (deblock_level - 5) * 10);
} else if (flags & VP8D_DEBLOCK) {
vp8_deblock(oci, &oci->post_proc_buffer_int, &oci->post_proc_buffer, q,
1, 0);
}
}
/* Move partially towards the base q of the previous frame */
oci->postproc_state.last_base_qindex =
(3 * oci->postproc_state.last_base_qindex + oci->base_qindex) >> 2;
} else if (flags & VP8D_DEMACROBLOCK) {
vp8_deblock(oci, oci->frame_to_show, &oci->post_proc_buffer,
q + (deblock_level - 5) * 10, 1, 0);
vp8_de_mblock(&oci->post_proc_buffer, q + (deblock_level - 5) * 10);
oci->postproc_state.last_base_qindex = oci->base_qindex;
} else if (flags & VP8D_DEBLOCK) {
vp8_deblock(oci, oci->frame_to_show, &oci->post_proc_buffer, q, 1, 0);
oci->postproc_state.last_base_qindex = oci->base_qindex;
} else {
vp8_yv12_copy_frame(oci->frame_to_show, &oci->post_proc_buffer);
oci->postproc_state.last_base_qindex = oci->base_qindex;
}
oci->postproc_state.last_frame_valid = 1;
if (flags & VP8D_ADDNOISE) {
if (oci->postproc_state.last_q != q ||
oci->postproc_state.last_noise != noise_level) {
double sigma;
struct postproc_state *ppstate = &oci->postproc_state;
vpx_clear_system_state();
sigma = noise_level + .5 + .6 * q / 63.0;
ppstate->clamp =
vpx_setup_noise(sigma, ppstate->generated_noise, oci->Width + 256);
ppstate->last_q = q;
ppstate->last_noise = noise_level;
}
vpx_plane_add_noise(
oci->post_proc_buffer.y_buffer, oci->postproc_state.generated_noise,
oci->postproc_state.clamp, oci->postproc_state.clamp,
oci->post_proc_buffer.y_width, oci->post_proc_buffer.y_height,
oci->post_proc_buffer.y_stride);
}
*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;
}
#endif