ref: 397aad3ec28020a9b766e362e061701783c9633e
dir: /vp8/common/loopfilter.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 "loopfilter.h"
#include "onyxc_int.h"
typedef unsigned char uc;
prototype_loopfilter(vp8_loop_filter_horizontal_edge_c);
prototype_loopfilter(vp8_loop_filter_vertical_edge_c);
prototype_loopfilter(vp8_mbloop_filter_horizontal_edge_c);
prototype_loopfilter(vp8_mbloop_filter_vertical_edge_c);
prototype_loopfilter(vp8_loop_filter_simple_horizontal_edge_c);
prototype_loopfilter(vp8_loop_filter_simple_vertical_edge_c);
// Horizontal MB filtering
void vp8_loop_filter_mbh_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) simpler_lpf;
vp8_mbloop_filter_horizontal_edge_c(y_ptr, y_stride, lfi->mbflim, lfi->lim, lfi->mbthr, 2);
if (u_ptr)
vp8_mbloop_filter_horizontal_edge_c(u_ptr, uv_stride, lfi->uvmbflim, lfi->uvlim, lfi->uvmbthr, 1);
if (v_ptr)
vp8_mbloop_filter_horizontal_edge_c(v_ptr, uv_stride, lfi->uvmbflim, lfi->uvlim, lfi->uvmbthr, 1);
}
void vp8_loop_filter_mbhs_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) u_ptr;
(void) v_ptr;
(void) uv_stride;
(void) simpler_lpf;
vp8_loop_filter_simple_horizontal_edge_c(y_ptr, y_stride, lfi->mbflim, lfi->lim, lfi->mbthr, 2);
}
// Vertical MB Filtering
void vp8_loop_filter_mbv_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) simpler_lpf;
vp8_mbloop_filter_vertical_edge_c(y_ptr, y_stride, lfi->mbflim, lfi->lim, lfi->mbthr, 2);
if (u_ptr)
vp8_mbloop_filter_vertical_edge_c(u_ptr, uv_stride, lfi->uvmbflim, lfi->uvlim, lfi->uvmbthr, 1);
if (v_ptr)
vp8_mbloop_filter_vertical_edge_c(v_ptr, uv_stride, lfi->uvmbflim, lfi->uvlim, lfi->uvmbthr, 1);
}
void vp8_loop_filter_mbvs_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) u_ptr;
(void) v_ptr;
(void) uv_stride;
(void) simpler_lpf;
vp8_loop_filter_simple_vertical_edge_c(y_ptr, y_stride, lfi->mbflim, lfi->lim, lfi->mbthr, 2);
}
// Horizontal B Filtering
void vp8_loop_filter_bh_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) simpler_lpf;
vp8_loop_filter_horizontal_edge_c(y_ptr + 4 * y_stride, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_horizontal_edge_c(y_ptr + 8 * y_stride, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_horizontal_edge_c(y_ptr + 12 * y_stride, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
if (u_ptr)
vp8_loop_filter_horizontal_edge_c(u_ptr + 4 * uv_stride, uv_stride, lfi->uvflim, lfi->uvlim, lfi->uvthr, 1);
if (v_ptr)
vp8_loop_filter_horizontal_edge_c(v_ptr + 4 * uv_stride, uv_stride, lfi->uvflim, lfi->uvlim, lfi->uvthr, 1);
}
void vp8_loop_filter_bhs_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) u_ptr;
(void) v_ptr;
(void) uv_stride;
(void) simpler_lpf;
vp8_loop_filter_simple_horizontal_edge_c(y_ptr + 4 * y_stride, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_simple_horizontal_edge_c(y_ptr + 8 * y_stride, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_simple_horizontal_edge_c(y_ptr + 12 * y_stride, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
}
// Vertical B Filtering
void vp8_loop_filter_bv_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) simpler_lpf;
vp8_loop_filter_vertical_edge_c(y_ptr + 4, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_vertical_edge_c(y_ptr + 8, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_vertical_edge_c(y_ptr + 12, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
if (u_ptr)
vp8_loop_filter_vertical_edge_c(u_ptr + 4, uv_stride, lfi->uvflim, lfi->uvlim, lfi->uvthr, 1);
if (v_ptr)
vp8_loop_filter_vertical_edge_c(v_ptr + 4, uv_stride, lfi->uvflim, lfi->uvlim, lfi->uvthr, 1);
}
void vp8_loop_filter_bvs_c(unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr,
int y_stride, int uv_stride, loop_filter_info *lfi, int simpler_lpf)
{
(void) u_ptr;
(void) v_ptr;
(void) uv_stride;
(void) simpler_lpf;
vp8_loop_filter_simple_vertical_edge_c(y_ptr + 4, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_simple_vertical_edge_c(y_ptr + 8, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
vp8_loop_filter_simple_vertical_edge_c(y_ptr + 12, y_stride, lfi->flim, lfi->lim, lfi->thr, 2);
}
void vp8_init_loop_filter(VP8_COMMON *cm)
{
loop_filter_info *lfi = cm->lf_info;
LOOPFILTERTYPE lft = cm->filter_type;
int sharpness_lvl = cm->sharpness_level;
int frame_type = cm->frame_type;
int i, j;
int block_inside_limit = 0;
int HEVThresh;
const int yhedge_boost = 2;
const int uvhedge_boost = 2;
// For each possible value for the loop filter fill out a "loop_filter_info" entry.
for (i = 0; i <= MAX_LOOP_FILTER; i++)
{
int filt_lvl = i;
if (frame_type == KEY_FRAME)
{
if (filt_lvl >= 40)
HEVThresh = 2;
else if (filt_lvl >= 15)
HEVThresh = 1;
else
HEVThresh = 0;
}
else
{
if (filt_lvl >= 40)
HEVThresh = 3;
else if (filt_lvl >= 20)
HEVThresh = 2;
else if (filt_lvl >= 15)
HEVThresh = 1;
else
HEVThresh = 0;
}
// Set loop filter paramaeters that control sharpness.
block_inside_limit = filt_lvl >> (sharpness_lvl > 0);
block_inside_limit = block_inside_limit >> (sharpness_lvl > 4);
if (sharpness_lvl > 0)
{
if (block_inside_limit > (9 - sharpness_lvl))
block_inside_limit = (9 - sharpness_lvl);
}
if (block_inside_limit < 1)
block_inside_limit = 1;
for (j = 0; j < 16; j++)
{
lfi[i].lim[j] = block_inside_limit;
lfi[i].mbflim[j] = filt_lvl + yhedge_boost;
lfi[i].mbthr[j] = HEVThresh;
lfi[i].flim[j] = filt_lvl;
lfi[i].thr[j] = HEVThresh;
lfi[i].uvlim[j] = block_inside_limit;
lfi[i].uvmbflim[j] = filt_lvl + uvhedge_boost;
lfi[i].uvmbthr[j] = HEVThresh;
lfi[i].uvflim[j] = filt_lvl;
lfi[i].uvthr[j] = HEVThresh;
}
}
// Set up the function pointers depending on the type of loop filtering selected
if (lft == NORMAL_LOOPFILTER)
{
cm->lf_mbv = LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_v);
cm->lf_bv = LF_INVOKE(&cm->rtcd.loopfilter, normal_b_v);
cm->lf_mbh = LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_h);
cm->lf_bh = LF_INVOKE(&cm->rtcd.loopfilter, normal_b_h);
}
else
{
cm->lf_mbv = LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_v);
cm->lf_bv = LF_INVOKE(&cm->rtcd.loopfilter, simple_b_v);
cm->lf_mbh = LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_h);
cm->lf_bh = LF_INVOKE(&cm->rtcd.loopfilter, simple_b_h);
}
}
// Put vp8_init_loop_filter() in vp8dx_create_decompressor(). Only call vp8_frame_init_loop_filter() while decoding
// each frame. Check last_frame_type to skip the function most of times.
void vp8_frame_init_loop_filter(loop_filter_info *lfi, int frame_type)
{
int HEVThresh;
int i, j;
// For each possible value for the loop filter fill out a "loop_filter_info" entry.
for (i = 0; i <= MAX_LOOP_FILTER; i++)
{
int filt_lvl = i;
if (frame_type == KEY_FRAME)
{
if (filt_lvl >= 40)
HEVThresh = 2;
else if (filt_lvl >= 15)
HEVThresh = 1;
else
HEVThresh = 0;
}
else
{
if (filt_lvl >= 40)
HEVThresh = 3;
else if (filt_lvl >= 20)
HEVThresh = 2;
else if (filt_lvl >= 15)
HEVThresh = 1;
else
HEVThresh = 0;
}
for (j = 0; j < 16; j++)
{
//lfi[i].lim[j] = block_inside_limit;
//lfi[i].mbflim[j] = filt_lvl+yhedge_boost;
lfi[i].mbthr[j] = HEVThresh;
//lfi[i].flim[j] = filt_lvl;
lfi[i].thr[j] = HEVThresh;
//lfi[i].uvlim[j] = block_inside_limit;
//lfi[i].uvmbflim[j] = filt_lvl+uvhedge_boost;
lfi[i].uvmbthr[j] = HEVThresh;
//lfi[i].uvflim[j] = filt_lvl;
lfi[i].uvthr[j] = HEVThresh;
}
}
}
void vp8_adjust_mb_lf_value(MACROBLOCKD *mbd, int *filter_level)
{
MB_MODE_INFO *mbmi = &mbd->mode_info_context->mbmi;
if (mbd->mode_ref_lf_delta_enabled)
{
// Aplly delta for reference frame
*filter_level += mbd->ref_lf_deltas[mbmi->ref_frame];
// Apply delta for mode
if (mbmi->ref_frame == INTRA_FRAME)
{
// Only the split mode BPRED has a further special case
if (mbmi->mode == B_PRED)
*filter_level += mbd->mode_lf_deltas[0];
}
else
{
// Zero motion mode
if (mbmi->mode == ZEROMV)
*filter_level += mbd->mode_lf_deltas[1];
// Split MB motion mode
else if (mbmi->mode == SPLITMV)
*filter_level += mbd->mode_lf_deltas[3];
// All other inter motion modes (Nearest, Near, New)
else
*filter_level += mbd->mode_lf_deltas[2];
}
// Range check
if (*filter_level > MAX_LOOP_FILTER)
*filter_level = MAX_LOOP_FILTER;
else if (*filter_level < 0)
*filter_level = 0;
}
}
void vp8_loop_filter_frame
(
VP8_COMMON *cm,
MACROBLOCKD *mbd,
int default_filt_lvl
)
{
YV12_BUFFER_CONFIG *post = cm->frame_to_show;
loop_filter_info *lfi = cm->lf_info;
int frame_type = cm->frame_type;
int mb_row;
int mb_col;
int baseline_filter_level[MAX_MB_SEGMENTS];
int filter_level;
int alt_flt_enabled = mbd->segmentation_enabled;
int i;
unsigned char *y_ptr, *u_ptr, *v_ptr;
mbd->mode_info_context = cm->mi; // Point at base of Mb MODE_INFO list
// Note the baseline filter values for each segment
if (alt_flt_enabled)
{
for (i = 0; i < MAX_MB_SEGMENTS; i++)
{
// Abs value
if (mbd->mb_segement_abs_delta == SEGMENT_ABSDATA)
baseline_filter_level[i] = mbd->segment_feature_data[MB_LVL_ALT_LF][i];
// Delta Value
else
{
baseline_filter_level[i] = default_filt_lvl + mbd->segment_feature_data[MB_LVL_ALT_LF][i];
baseline_filter_level[i] = (baseline_filter_level[i] >= 0) ? ((baseline_filter_level[i] <= MAX_LOOP_FILTER) ? baseline_filter_level[i] : MAX_LOOP_FILTER) : 0; // Clamp to valid range
}
}
}
else
{
for (i = 0; i < MAX_MB_SEGMENTS; i++)
baseline_filter_level[i] = default_filt_lvl;
}
// Initialize the loop filter for this frame.
if ((cm->last_filter_type != cm->filter_type) || (cm->last_sharpness_level != cm->sharpness_level))
vp8_init_loop_filter(cm);
else if (frame_type != cm->last_frame_type)
vp8_frame_init_loop_filter(lfi, frame_type);
// Set up the buffer pointers
y_ptr = post->y_buffer;
u_ptr = post->u_buffer;
v_ptr = post->v_buffer;
// vp8_filter each macro block
for (mb_row = 0; mb_row < cm->mb_rows; mb_row++)
{
for (mb_col = 0; mb_col < cm->mb_cols; mb_col++)
{
int Segment = (alt_flt_enabled) ? mbd->mode_info_context->mbmi.segment_id : 0;
filter_level = baseline_filter_level[Segment];
// Distance of Mb to the various image edges.
// These specified to 8th pel as they are always compared to values that are in 1/8th pel units
// Apply any context driven MB level adjustment
vp8_adjust_mb_lf_value(mbd, &filter_level);
if (filter_level)
{
if (mb_col > 0)
cm->lf_mbv(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi[filter_level], cm->simpler_lpf);
if (mbd->mode_info_context->mbmi.dc_diff > 0)
cm->lf_bv(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi[filter_level], cm->simpler_lpf);
// don't apply across umv border
if (mb_row > 0)
cm->lf_mbh(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi[filter_level], cm->simpler_lpf);
if (mbd->mode_info_context->mbmi.dc_diff > 0)
cm->lf_bh(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi[filter_level], cm->simpler_lpf);
}
y_ptr += 16;
u_ptr += 8;
v_ptr += 8;
mbd->mode_info_context++; // step to next MB
}
y_ptr += post->y_stride * 16 - post->y_width;
u_ptr += post->uv_stride * 8 - post->uv_width;
v_ptr += post->uv_stride * 8 - post->uv_width;
mbd->mode_info_context++; // Skip border mb
}
}
void vp8_loop_filter_frame_yonly
(
VP8_COMMON *cm,
MACROBLOCKD *mbd,
int default_filt_lvl,
int sharpness_lvl
)
{
YV12_BUFFER_CONFIG *post = cm->frame_to_show;
int i;
unsigned char *y_ptr;
int mb_row;
int mb_col;
loop_filter_info *lfi = cm->lf_info;
int baseline_filter_level[MAX_MB_SEGMENTS];
int filter_level;
int alt_flt_enabled = mbd->segmentation_enabled;
int frame_type = cm->frame_type;
(void) sharpness_lvl;
//MODE_INFO * this_mb_mode_info = cm->mi; // Point at base of Mb MODE_INFO list
mbd->mode_info_context = cm->mi; // Point at base of Mb MODE_INFO list
// Note the baseline filter values for each segment
if (alt_flt_enabled)
{
for (i = 0; i < MAX_MB_SEGMENTS; i++)
{
// Abs value
if (mbd->mb_segement_abs_delta == SEGMENT_ABSDATA)
baseline_filter_level[i] = mbd->segment_feature_data[MB_LVL_ALT_LF][i];
// Delta Value
else
{
baseline_filter_level[i] = default_filt_lvl + mbd->segment_feature_data[MB_LVL_ALT_LF][i];
baseline_filter_level[i] = (baseline_filter_level[i] >= 0) ? ((baseline_filter_level[i] <= MAX_LOOP_FILTER) ? baseline_filter_level[i] : MAX_LOOP_FILTER) : 0; // Clamp to valid range
}
}
}
else
{
for (i = 0; i < MAX_MB_SEGMENTS; i++)
baseline_filter_level[i] = default_filt_lvl;
}
// Initialize the loop filter for this frame.
if ((cm->last_filter_type != cm->filter_type) || (cm->last_sharpness_level != cm->sharpness_level))
vp8_init_loop_filter(cm);
else if (frame_type != cm->last_frame_type)
vp8_frame_init_loop_filter(lfi, frame_type);
// Set up the buffer pointers
y_ptr = post->y_buffer;
// vp8_filter each macro block
for (mb_row = 0; mb_row < cm->mb_rows; mb_row++)
{
for (mb_col = 0; mb_col < cm->mb_cols; mb_col++)
{
int Segment = (alt_flt_enabled) ? mbd->mode_info_context->mbmi.segment_id : 0;
filter_level = baseline_filter_level[Segment];
// Apply any context driven MB level adjustment
vp8_adjust_mb_lf_value(mbd, &filter_level);
if (filter_level)
{
if (mb_col > 0)
cm->lf_mbv(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
if (mbd->mode_info_context->mbmi.dc_diff > 0)
cm->lf_bv(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
// don't apply across umv border
if (mb_row > 0)
cm->lf_mbh(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
if (mbd->mode_info_context->mbmi.dc_diff > 0)
cm->lf_bh(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
}
y_ptr += 16;
mbd->mode_info_context ++; // step to next MB
}
y_ptr += post->y_stride * 16 - post->y_width;
mbd->mode_info_context ++; // Skip border mb
}
}
void vp8_loop_filter_partial_frame
(
VP8_COMMON *cm,
MACROBLOCKD *mbd,
int default_filt_lvl,
int sharpness_lvl,
int Fraction
)
{
YV12_BUFFER_CONFIG *post = cm->frame_to_show;
int i;
unsigned char *y_ptr;
int mb_row;
int mb_col;
//int mb_rows = post->y_height >> 4;
int mb_cols = post->y_width >> 4;
int linestocopy;
loop_filter_info *lfi = cm->lf_info;
int baseline_filter_level[MAX_MB_SEGMENTS];
int filter_level;
int alt_flt_enabled = mbd->segmentation_enabled;
int frame_type = cm->frame_type;
(void) sharpness_lvl;
//MODE_INFO * this_mb_mode_info = cm->mi + (post->y_height>>5) * (mb_cols + 1); // Point at base of Mb MODE_INFO list
mbd->mode_info_context = cm->mi + (post->y_height >> 5) * (mb_cols + 1); // Point at base of Mb MODE_INFO list
linestocopy = (post->y_height >> (4 + Fraction));
if (linestocopy < 1)
linestocopy = 1;
linestocopy <<= 4;
// Note the baseline filter values for each segment
if (alt_flt_enabled)
{
for (i = 0; i < MAX_MB_SEGMENTS; i++)
{
// Abs value
if (mbd->mb_segement_abs_delta == SEGMENT_ABSDATA)
baseline_filter_level[i] = mbd->segment_feature_data[MB_LVL_ALT_LF][i];
// Delta Value
else
{
baseline_filter_level[i] = default_filt_lvl + mbd->segment_feature_data[MB_LVL_ALT_LF][i];
baseline_filter_level[i] = (baseline_filter_level[i] >= 0) ? ((baseline_filter_level[i] <= MAX_LOOP_FILTER) ? baseline_filter_level[i] : MAX_LOOP_FILTER) : 0; // Clamp to valid range
}
}
}
else
{
for (i = 0; i < MAX_MB_SEGMENTS; i++)
baseline_filter_level[i] = default_filt_lvl;
}
// Initialize the loop filter for this frame.
if ((cm->last_filter_type != cm->filter_type) || (cm->last_sharpness_level != cm->sharpness_level))
vp8_init_loop_filter(cm);
else if (frame_type != cm->last_frame_type)
vp8_frame_init_loop_filter(lfi, frame_type);
// Set up the buffer pointers
y_ptr = post->y_buffer + (post->y_height >> 5) * 16 * post->y_stride;
// vp8_filter each macro block
for (mb_row = 0; mb_row<(linestocopy >> 4); mb_row++)
{
for (mb_col = 0; mb_col < mb_cols; mb_col++)
{
int Segment = (alt_flt_enabled) ? mbd->mode_info_context->mbmi.segment_id : 0;
filter_level = baseline_filter_level[Segment];
if (filter_level)
{
if (mb_col > 0)
cm->lf_mbv(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
if (mbd->mode_info_context->mbmi.dc_diff > 0)
cm->lf_bv(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
cm->lf_mbh(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
if (mbd->mode_info_context->mbmi.dc_diff > 0)
cm->lf_bh(y_ptr, 0, 0, post->y_stride, 0, &lfi[filter_level], 0);
}
y_ptr += 16;
mbd->mode_info_context += 1; // step to next MB
}
y_ptr += post->y_stride * 16 - post->y_width;
mbd->mode_info_context += 1; // Skip border mb
}
}