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vpx/vp8/common/loopfilter.c
Paul Wilkins 01ce04bc06 Further segment feature extensions. 
This quite large check in includes the following:

Merge in some code from Ronald (mbgraph.c) that scans a Gf/arf group.
This is used as a basis for a simple segmentation for the normal frames
in a gf/arf group. This code also uses satd functions from Yaowu.

Adds functionality for coding the latest possible position of an EOB for
blocks in the segment. (Currently 0-15 only, hence just for 4x4 dct).
Where the EOB position is 0 this acts like "skip" and the normal coding
of skip at the per mb level is disabled.

Added functions (seg_common.c) for setting and reading segment feature
elements. These may want to be optimized away at some point but while the
mecahnism is in a state of flux they provide a single location for making
changes and keep things a bit cleaner.

This is still proof of concept code. Currently the tested feature set:-

Quantizer,
Loop Filter level,
Reference frame,
Prediction Mode,
EOB end stop.

TBD:-

Add functions for setting and reading the feature data with range
and validity checking.

Handling of signed and unsigned feature data. At the moment all is assumed
to be signed and a sign bit is coded but many cannot be negative.

Correct handling of EOB feature with intra coded blocks.

Testing/trapping of legal/illegal ref frame and mode combinations.

Transform size switch plus merge and test with 8c8 DCT work

Merge and test with Sumans Segmenation coding optimizations

Change-Id: Iee12e83661c7abbd1e0ce6810915eb4ec35e2d8e
2011-10-24 15:52:18 +01:00

635 lines
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/*
* 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 "loopfilter.h"
#include "onyxc_int.h"
#include "vpx_mem/vpx_mem.h"
#if CONFIG_SEGFEATURES
#include "vp8/common/seg_common.h"
#endif
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_simple_loopfilter(vp8_loop_filter_simple_horizontal_edge_c);
prototype_simple_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)
{
vp8_mbloop_filter_horizontal_edge_c(y_ptr, y_stride, lfi->mblim, lfi->lim, lfi->hev_thr, 2);
if (u_ptr)
vp8_mbloop_filter_horizontal_edge_c(u_ptr, uv_stride, lfi->mblim, lfi->lim, lfi->hev_thr, 1);
if (v_ptr)
vp8_mbloop_filter_horizontal_edge_c(v_ptr, uv_stride, lfi->mblim, lfi->lim, lfi->hev_thr, 1);
}
/* 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)
{
vp8_mbloop_filter_vertical_edge_c(y_ptr, y_stride, lfi->mblim, lfi->lim, lfi->hev_thr, 2);
if (u_ptr)
vp8_mbloop_filter_vertical_edge_c(u_ptr, uv_stride, lfi->mblim, lfi->lim, lfi->hev_thr, 1);
if (v_ptr)
vp8_mbloop_filter_vertical_edge_c(v_ptr, uv_stride, lfi->mblim, lfi->lim, lfi->hev_thr, 1);
}
/* 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)
{
vp8_loop_filter_horizontal_edge_c(y_ptr + 4 * y_stride, y_stride, lfi->blim, lfi->lim, lfi->hev_thr, 2);
vp8_loop_filter_horizontal_edge_c(y_ptr + 8 * y_stride, y_stride, lfi->blim, lfi->lim, lfi->hev_thr, 2);
vp8_loop_filter_horizontal_edge_c(y_ptr + 12 * y_stride, y_stride, lfi->blim, lfi->lim, lfi->hev_thr, 2);
if (u_ptr)
vp8_loop_filter_horizontal_edge_c(u_ptr + 4 * uv_stride, uv_stride, lfi->blim, lfi->lim, lfi->hev_thr, 1);
if (v_ptr)
vp8_loop_filter_horizontal_edge_c(v_ptr + 4 * uv_stride, uv_stride, lfi->blim, lfi->lim, lfi->hev_thr, 1);
}
void vp8_loop_filter_bhs_c(unsigned char *y_ptr, int y_stride,
const unsigned char *blimit)
{
vp8_loop_filter_simple_horizontal_edge_c(y_ptr + 4 * y_stride, y_stride, blimit);
vp8_loop_filter_simple_horizontal_edge_c(y_ptr + 8 * y_stride, y_stride, blimit);
vp8_loop_filter_simple_horizontal_edge_c(y_ptr + 12 * y_stride, y_stride, blimit);
}
/* 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)
{
vp8_loop_filter_vertical_edge_c(y_ptr + 4, y_stride, lfi->blim, lfi->lim, lfi->hev_thr, 2);
vp8_loop_filter_vertical_edge_c(y_ptr + 8, y_stride, lfi->blim, lfi->lim, lfi->hev_thr, 2);
vp8_loop_filter_vertical_edge_c(y_ptr + 12, y_stride, lfi->blim, lfi->lim, lfi->hev_thr, 2);
if (u_ptr)
vp8_loop_filter_vertical_edge_c(u_ptr + 4, uv_stride, lfi->blim, lfi->lim, lfi->hev_thr, 1);
if (v_ptr)
vp8_loop_filter_vertical_edge_c(v_ptr + 4, uv_stride, lfi->blim, lfi->lim, lfi->hev_thr, 1);
}
void vp8_loop_filter_bvs_c(unsigned char *y_ptr, int y_stride,
const unsigned char *blimit)
{
vp8_loop_filter_simple_vertical_edge_c(y_ptr + 4, y_stride, blimit);
vp8_loop_filter_simple_vertical_edge_c(y_ptr + 8, y_stride, blimit);
vp8_loop_filter_simple_vertical_edge_c(y_ptr + 12, y_stride, blimit);
}
static void lf_init_lut(loop_filter_info_n *lfi)
{
int filt_lvl;
for (filt_lvl = 0; filt_lvl <= MAX_LOOP_FILTER; filt_lvl++)
{
if (filt_lvl >= 40)
{
lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 2;
lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 3;
}
else if (filt_lvl >= 20)
{
lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 1;
lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 2;
}
else if (filt_lvl >= 15)
{
lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 1;
lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 1;
}
else
{
lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 0;
lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 0;
}
}
lfi->mode_lf_lut[DC_PRED] = 1;
lfi->mode_lf_lut[V_PRED] = 1;
lfi->mode_lf_lut[H_PRED] = 1;
lfi->mode_lf_lut[TM_PRED] = 1;
lfi->mode_lf_lut[B_PRED] = 0;
lfi->mode_lf_lut[ZEROMV] = 1;
lfi->mode_lf_lut[NEARESTMV] = 2;
lfi->mode_lf_lut[NEARMV] = 2;
lfi->mode_lf_lut[NEWMV] = 2;
lfi->mode_lf_lut[SPLITMV] = 3;
}
void vp8_loop_filter_update_sharpness(loop_filter_info_n *lfi,
int sharpness_lvl)
{
int i;
/* For each possible value for the loop filter fill out limits */
for (i = 0; i <= MAX_LOOP_FILTER; i++)
{
int filt_lvl = i;
int block_inside_limit = 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;
vpx_memset(lfi->lim[i], block_inside_limit, SIMD_WIDTH);
vpx_memset(lfi->blim[i], (2 * filt_lvl + block_inside_limit),
SIMD_WIDTH);
vpx_memset(lfi->mblim[i], (2 * (filt_lvl + 2) + block_inside_limit),
SIMD_WIDTH);
}
}
void vp8_loop_filter_init(VP8_COMMON *cm)
{
loop_filter_info_n *lfi = &cm->lf_info;
int i;
/* init limits for given sharpness*/
vp8_loop_filter_update_sharpness(lfi, cm->sharpness_level);
cm->last_sharpness_level = cm->sharpness_level;
/* init LUT for lvl and hev thr picking */
lf_init_lut(lfi);
/* init hev threshold const vectors */
for(i = 0; i < 4 ; i++)
{
vpx_memset(lfi->hev_thr[i], i, SIMD_WIDTH);
}
}
void vp8_loop_filter_frame_init(VP8_COMMON *cm,
MACROBLOCKD *xd,
int default_filt_lvl)
{
int seg, /* segment number */
ref, /* index in ref_lf_deltas */
mode; /* index in mode_lf_deltas */
loop_filter_info_n *lfi = &cm->lf_info;
/* update limits if sharpness has changed */
if(cm->last_sharpness_level != cm->sharpness_level)
{
vp8_loop_filter_update_sharpness(lfi, cm->sharpness_level);
cm->last_sharpness_level = cm->sharpness_level;
}
for(seg = 0; seg < MAX_MB_SEGMENTS; seg++)
{
int lvl_seg = default_filt_lvl;
int lvl_ref, lvl_mode;
// Set the baseline filter values for each segment
#if CONFIG_SEGFEATURES
if ( segfeature_active( xd, seg, SEG_LVL_ALT_LF ) )
#else
if ( xd->segmentation_enabled )
#endif
{
/* Abs value */
if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA)
{
lvl_seg = xd->segment_feature_data[seg][SEG_LVL_ALT_LF];
}
else /* Delta Value */
{
lvl_seg += xd->segment_feature_data[seg][SEG_LVL_ALT_LF];
lvl_seg = (lvl_seg > 0) ? ((lvl_seg > 63) ? 63: lvl_seg) : 0;
}
}
if (!xd->mode_ref_lf_delta_enabled)
{
/* we could get rid of this if we assume that deltas are set to
* zero when not in use; encoder always uses deltas
*/
vpx_memset(lfi->lvl[seg][0], lvl_seg, 4 * 4 );
continue;
}
lvl_ref = lvl_seg;
/* INTRA_FRAME */
ref = INTRA_FRAME;
/* Apply delta for reference frame */
lvl_ref += xd->ref_lf_deltas[ref];
/* Apply delta for Intra modes */
mode = 0; /* B_PRED */
/* Only the split mode BPRED has a further special case */
lvl_mode = lvl_ref + xd->mode_lf_deltas[mode];
lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0; /* clamp */
lfi->lvl[seg][ref][mode] = lvl_mode;
mode = 1; /* all the rest of Intra modes */
lvl_mode = (lvl_ref > 0) ? (lvl_ref > 63 ? 63 : lvl_ref) : 0; /* clamp */
lfi->lvl[seg][ref][mode] = lvl_mode;
/* LAST, GOLDEN, ALT */
for(ref = 1; ref < MAX_REF_FRAMES; ref++)
{
int lvl_ref = lvl_seg;
/* Apply delta for reference frame */
lvl_ref += xd->ref_lf_deltas[ref];
/* Apply delta for Inter modes */
for (mode = 1; mode < 4; mode++)
{
lvl_mode = lvl_ref + xd->mode_lf_deltas[mode];
lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0; /* clamp */
lfi->lvl[seg][ref][mode] = lvl_mode;
}
}
}
}
void vp8_loop_filter_frame
(
VP8_COMMON *cm,
MACROBLOCKD *mbd
)
{
YV12_BUFFER_CONFIG *post = cm->frame_to_show;
loop_filter_info_n *lfi_n = &cm->lf_info;
loop_filter_info lfi;
FRAME_TYPE frame_type = cm->frame_type;
int mb_row;
int mb_col;
int filter_level;
unsigned char *y_ptr, *u_ptr, *v_ptr;
/* Point at base of Mb MODE_INFO list */
const MODE_INFO *mode_info_context = cm->mi;
/* Initialize the loop filter for this frame. */
vp8_loop_filter_frame_init(cm, mbd, cm->filter_level);
/* 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 skip_lf = (mode_info_context->mbmi.mode != B_PRED &&
mode_info_context->mbmi.mode != SPLITMV &&
mode_info_context->mbmi.mb_skip_coeff);
const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode];
const int seg = mode_info_context->mbmi.segment_id;
const int ref_frame = mode_info_context->mbmi.ref_frame;
filter_level = lfi_n->lvl[seg][ref_frame][mode_index];
if (filter_level)
{
if (cm->filter_type == NORMAL_LOOPFILTER)
{
const int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level];
lfi.mblim = lfi_n->mblim[filter_level];
lfi.blim = lfi_n->blim[filter_level];
lfi.lim = lfi_n->lim[filter_level];
lfi.hev_thr = lfi_n->hev_thr[hev_index];
if (mb_col > 0)
LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_v)
(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, normal_b_v)
(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi);
/* don't apply across umv border */
if (mb_row > 0)
LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_h)
(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, normal_b_h)
(y_ptr, u_ptr, v_ptr, post->y_stride, post->uv_stride, &lfi);
}
else
{
if (mb_col > 0)
LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_v)
(y_ptr, post->y_stride, lfi_n->mblim[filter_level]);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, simple_b_v)
(y_ptr, post->y_stride, lfi_n->blim[filter_level]);
/* don't apply across umv border */
if (mb_row > 0)
LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_h)
(y_ptr, post->y_stride, lfi_n->mblim[filter_level]);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, simple_b_h)
(y_ptr, post->y_stride, lfi_n->blim[filter_level]);
}
}
y_ptr += 16;
u_ptr += 8;
v_ptr += 8;
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;
mode_info_context++; /* Skip border mb */
}
}
void vp8_loop_filter_frame_yonly
(
VP8_COMMON *cm,
MACROBLOCKD *mbd,
int default_filt_lvl
)
{
YV12_BUFFER_CONFIG *post = cm->frame_to_show;
unsigned char *y_ptr;
int mb_row;
int mb_col;
loop_filter_info_n *lfi_n = &cm->lf_info;
loop_filter_info lfi;
int filter_level;
FRAME_TYPE frame_type = cm->frame_type;
/* Point at base of Mb MODE_INFO list */
const MODE_INFO *mode_info_context = cm->mi;
#if 0
if(default_filt_lvl == 0) /* no filter applied */
return;
#endif
/* Initialize the loop filter for this frame. */
vp8_loop_filter_frame_init( cm, mbd, default_filt_lvl);
/* 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 skip_lf = (mode_info_context->mbmi.mode != B_PRED &&
mode_info_context->mbmi.mode != SPLITMV &&
mode_info_context->mbmi.mb_skip_coeff);
const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode];
const int seg = mode_info_context->mbmi.segment_id;
const int ref_frame = mode_info_context->mbmi.ref_frame;
filter_level = lfi_n->lvl[seg][ref_frame][mode_index];
if (filter_level)
{
if (cm->filter_type == NORMAL_LOOPFILTER)
{
const int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level];
lfi.mblim = lfi_n->mblim[filter_level];
lfi.blim = lfi_n->blim[filter_level];
lfi.lim = lfi_n->lim[filter_level];
lfi.hev_thr = lfi_n->hev_thr[hev_index];
if (mb_col > 0)
LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_v)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, normal_b_v)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
/* don't apply across umv border */
if (mb_row > 0)
LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_h)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, normal_b_h)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
}
else
{
if (mb_col > 0)
LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_v)
(y_ptr, post->y_stride, lfi_n->mblim[filter_level]);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, simple_b_v)
(y_ptr, post->y_stride, lfi_n->blim[filter_level]);
/* don't apply across umv border */
if (mb_row > 0)
LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_h)
(y_ptr, post->y_stride, lfi_n->mblim[filter_level]);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, simple_b_h)
(y_ptr, post->y_stride, lfi_n->blim[filter_level]);
}
}
y_ptr += 16;
mode_info_context ++; /* step to next MB */
}
y_ptr += post->y_stride * 16 - post->y_width;
mode_info_context ++; /* Skip border mb */
}
}
void vp8_loop_filter_partial_frame
(
VP8_COMMON *cm,
MACROBLOCKD *mbd,
int default_filt_lvl
)
{
YV12_BUFFER_CONFIG *post = cm->frame_to_show;
unsigned char *y_ptr;
int mb_row;
int mb_col;
int mb_cols = post->y_width >> 4;
int linestocopy, i;
loop_filter_info_n *lfi_n = &cm->lf_info;
loop_filter_info lfi;
int filter_level;
int alt_flt_enabled = mbd->segmentation_enabled;
FRAME_TYPE frame_type = cm->frame_type;
const MODE_INFO *mode_info_context;
int lvl_seg[MAX_MB_SEGMENTS];
mode_info_context = cm->mi + (post->y_height >> 5) * (mb_cols + 1);
/* 3 is a magic number. 4 is probably magic too */
linestocopy = (post->y_height >> (4 + 3));
if (linestocopy < 1)
linestocopy = 1;
linestocopy <<= 4;
/* Note the baseline filter values for each segment */
/* See vp8_loop_filter_frame_init. Rather than call that for each change
* to default_filt_lvl, copy the relevant calculation here.
*/
if (alt_flt_enabled)
{
for (i = 0; i < MAX_MB_SEGMENTS; i++)
{ /* Abs value */
if (mbd->mb_segement_abs_delta == SEGMENT_ABSDATA)
{
lvl_seg[i] = mbd->segment_feature_data[i][SEG_LVL_ALT_LF];
}
/* Delta Value */
else
{
lvl_seg[i] = default_filt_lvl
+ mbd->segment_feature_data[i][SEG_LVL_ALT_LF];
lvl_seg[i] = (lvl_seg[i] > 0) ?
((lvl_seg[i] > 63) ? 63: lvl_seg[i]) : 0;
}
}
}
/* 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 skip_lf = (mode_info_context->mbmi.mode != B_PRED &&
mode_info_context->mbmi.mode != SPLITMV &&
mode_info_context->mbmi.mb_skip_coeff);
if (alt_flt_enabled)
filter_level = lvl_seg[mode_info_context->mbmi.segment_id];
else
filter_level = default_filt_lvl;
if (filter_level)
{
if (cm->filter_type == NORMAL_LOOPFILTER)
{
const int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level];
lfi.mblim = lfi_n->mblim[filter_level];
lfi.blim = lfi_n->blim[filter_level];
lfi.lim = lfi_n->lim[filter_level];
lfi.hev_thr = lfi_n->hev_thr[hev_index];
if (mb_col > 0)
LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_v)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, normal_b_v)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
LF_INVOKE(&cm->rtcd.loopfilter, normal_mb_h)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, normal_b_h)
(y_ptr, 0, 0, post->y_stride, 0, &lfi);
}
else
{
if (mb_col > 0)
LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_v)
(y_ptr, post->y_stride, lfi_n->mblim[filter_level]);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, simple_b_v)
(y_ptr, post->y_stride, lfi_n->blim[filter_level]);
LF_INVOKE(&cm->rtcd.loopfilter, simple_mb_h)
(y_ptr, post->y_stride, lfi_n->mblim[filter_level]);
if (!skip_lf)
LF_INVOKE(&cm->rtcd.loopfilter, simple_b_h)
(y_ptr, post->y_stride, lfi_n->blim[filter_level]);
}
}
y_ptr += 16;
mode_info_context += 1; /* step to next MB */
}
y_ptr += post->y_stride * 16 - post->y_width;
mode_info_context += 1; /* Skip border mb */
}
}
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