ref: 674e477b81ceeb6677d3297095e91cfbd4dc2850
dir: /vp8/common/postproc.c/
/*
* Copyright (c) 2010 The VP8 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 "postproc.h"
#include "vpx_scale/yv12extend.h"
#include "vpx_scale/vpxscale.h"
#include "systemdependent.h"
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
// global constants
static const short kernel5[] =
{
1, 1, 4, 1, 1
};
const short vp8_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,
};
extern void vp8_blit_text(const char *msg, unsigned char *address, const int pitch);
/***********************************************************************************************************
*/
void vp8_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;
}
}
int vp8_q2mbl(int x)
{
if (x < 20) x = 20;
x = 50 + (x - 50) * 10 / 8;
return x * x / 3;
}
void vp8_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 vp8_mbpost_proc_down_c(unsigned char *dst, int pitch, int rows, int cols, int flimit)
{
int r, c, i;
const short *rv3 = &vp8_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 vp8_deblock_and_de_macro_block(YV12_BUFFER_CONFIG *source,
YV12_BUFFER_CONFIG *post,
int q,
int low_var_thresh,
int flag,
vp8_postproc_rtcd_vtable_t *rtcd)
{
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;
POSTPROC_INVOKE(rtcd, downacross)(source->y_buffer, post->y_buffer, source->y_stride, post->y_stride, source->y_height, source->y_width, ppl);
POSTPROC_INVOKE(rtcd, across)(post->y_buffer, post->y_stride, post->y_height, post->y_width, vp8_q2mbl(q));
POSTPROC_INVOKE(rtcd, down)(post->y_buffer, post->y_stride, post->y_height, post->y_width, vp8_q2mbl(q));
POSTPROC_INVOKE(rtcd, downacross)(source->u_buffer, post->u_buffer, source->uv_stride, post->uv_stride, source->uv_height, source->uv_width, ppl);
POSTPROC_INVOKE(rtcd, downacross)(source->v_buffer, post->v_buffer, source->uv_stride, post->uv_stride, source->uv_height, source->uv_width, ppl);
}
void vp8_deblock(YV12_BUFFER_CONFIG *source,
YV12_BUFFER_CONFIG *post,
int q,
int low_var_thresh,
int flag,
vp8_postproc_rtcd_vtable_t *rtcd)
{
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;
POSTPROC_INVOKE(rtcd, downacross)(source->y_buffer, post->y_buffer, source->y_stride, post->y_stride, source->y_height, source->y_width, ppl);
POSTPROC_INVOKE(rtcd, downacross)(source->u_buffer, post->u_buffer, source->uv_stride, post->uv_stride, source->uv_height, source->uv_width, ppl);
POSTPROC_INVOKE(rtcd, downacross)(source->v_buffer, post->v_buffer, source->uv_stride, post->uv_stride, source->uv_height, source->uv_width, ppl);
}
void vp8_de_noise(YV12_BUFFER_CONFIG *source,
YV12_BUFFER_CONFIG *post,
int q,
int low_var_thresh,
int flag,
vp8_postproc_rtcd_vtable_t *rtcd)
{
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;
POSTPROC_INVOKE(rtcd, downacross)(
source->y_buffer + 2 * source->y_stride + 2,
source->y_buffer + 2 * source->y_stride + 2,
source->y_stride,
source->y_stride,
source->y_height - 4,
source->y_width - 4,
ppl);
POSTPROC_INVOKE(rtcd, downacross)(
source->u_buffer + 2 * source->uv_stride + 2,
source->u_buffer + 2 * source->uv_stride + 2,
source->uv_stride,
source->uv_stride,
source->uv_height - 4,
source->uv_width - 4, ppl);
POSTPROC_INVOKE(rtcd, downacross)(
source->v_buffer + 2 * source->uv_stride + 2,
source->v_buffer + 2 * source->uv_stride + 2,
source->uv_stride,
source->uv_stride,
source->uv_height - 4,
source->uv_width - 4, ppl);
}
double vp8_gaussian(double sigma, double mu, double x)
{
return 1 / (sigma * sqrt(2.0 * 3.14159265)) *
(exp(-(x - mu) * (x - mu) / (2 * sigma * sigma)));
}
extern void (*vp8_clear_system_state)(void);
static void fillrd(struct postproc_state *state, int q, int a)
{
char char_dist[300];
double sigma;
int ai = a, qi = q, i;
vp8_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 * vp8_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 vp8_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];
}
}
}
#if CONFIG_RUNTIME_CPU_DETECT
#define RTCD_VTABLE(oci) (&(oci)->rtcd.postproc)
#else
#define RTCD_VTABLE(oci) NULL
#endif
int vp8_post_proc_frame(VP8_COMMON *oci, YV12_BUFFER_CONFIG *dest, int deblock_level, int noise_level, int flags)
{
char message[512];
int q = oci->filter_level * 10 / 6;
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 & VP8D_DEMACROBLOCK)
{
vp8_deblock_and_de_macro_block(oci->frame_to_show, &oci->post_proc_buffer,
q + (deblock_level - 5) * 10, 1, 0, RTCD_VTABLE(oci));
}
else if (flags & VP8D_DEBLOCK)
{
vp8_deblock(oci->frame_to_show, &oci->post_proc_buffer,
q, 1, 0, RTCD_VTABLE(oci));
}
else
{
vp8_yv12_copy_frame_ptr(oci->frame_to_show, &oci->post_proc_buffer);
}
if (flags & VP8D_ADDNOISE)
{
if (oci->postproc_state.last_q != q
|| oci->postproc_state.last_noise != noise_level)
{
fillrd(&oci->postproc_state, 63 - q, noise_level);
}
POSTPROC_INVOKE(RTCD_VTABLE(oci), addnoise)
(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 (flags & VP8D_DEBUG_LEVEL1)
{
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);
vp8_blit_text(message, oci->post_proc_buffer.y_buffer, oci->post_proc_buffer.y_stride);
}
else if (flags & VP8D_DEBUG_LEVEL2)
{
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;
// vp8_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');
vp8_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;
}
}
else if (flags & VP8D_DEBUG_LEVEL3)
{
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;
// vp8_filter each macro block
for (i = 0; i < mb_rows; i++)
{
for (j = 0; j < mb_cols; j++)
{
char zz[4];
if (oci->frame_type == KEY_FRAME)
sprintf(zz, "a");
else
sprintf(zz, "%c", mi[mb_index].mbmi.dc_diff + '0');
vp8_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;
}
}
else if (flags & VP8D_DEBUG_LEVEL4)
{
sprintf(message, "Bitrate: %10.2f frame_rate: %10.2f ", oci->bitrate, oci->framerate);
vp8_blit_text(message, oci->post_proc_buffer.y_buffer, oci->post_proc_buffer.y_stride);
#if 0
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;
// vp8_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.dc_diff + '0');
vp8_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;
}
#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;
}