ref: e8b818b581b9ab7e9c8f7b1becd753dd4efbdf43
dir: /vp8/common/vp8_loopfilter.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 "vp8_rtcd.h"
#include "loopfilter.h"
#include "onyxc_int.h"
#include "vpx_mem/vpx_mem.h"
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;
memset(lfi->lim[i], block_inside_limit, SIMD_WIDTH);
memset(lfi->blim[i], (2 * filt_lvl + block_inside_limit), SIMD_WIDTH);
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) {
memset(lfi->hev_thr[i], i, SIMD_WIDTH);
}
}
void vp8_loop_filter_frame_init(VP8_COMMON *cm, MACROBLOCKD *mbd,
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;
/* Note the baseline filter values for each segment */
if (mbd->segmentation_enabled) {
if (mbd->mb_segement_abs_delta == SEGMENT_ABSDATA) {
lvl_seg = mbd->segment_feature_data[MB_LVL_ALT_LF][seg];
} else { /* Delta Value */
lvl_seg += mbd->segment_feature_data[MB_LVL_ALT_LF][seg];
}
lvl_seg = (lvl_seg > 0) ? ((lvl_seg > 63) ? 63 : lvl_seg) : 0;
}
if (!mbd->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
*/
memset(lfi->lvl[seg][0], lvl_seg, 4 * 4);
continue;
}
/* INTRA_FRAME */
ref = INTRA_FRAME;
/* Apply delta for reference frame */
lvl_ref = lvl_seg + mbd->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 + mbd->mode_lf_deltas[mode];
/* clamp */
lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0;
lfi->lvl[seg][ref][mode] = lvl_mode;
mode = 1; /* all the rest of Intra modes */
/* clamp */
lvl_mode = (lvl_ref > 0) ? (lvl_ref > 63 ? 63 : lvl_ref) : 0;
lfi->lvl[seg][ref][mode] = lvl_mode;
/* LAST, GOLDEN, ALT */
for (ref = 1; ref < MAX_REF_FRAMES; ++ref) {
/* Apply delta for reference frame */
lvl_ref = lvl_seg + mbd->ref_lf_deltas[ref];
/* Apply delta for Inter modes */
for (mode = 1; mode < 4; ++mode) {
lvl_mode = lvl_ref + mbd->mode_lf_deltas[mode];
/* clamp */
lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0;
lfi->lvl[seg][ref][mode] = lvl_mode;
}
}
}
}
void vp8_loop_filter_row_normal(VP8_COMMON *cm, MODE_INFO *mode_info_context,
int mb_row, int post_ystride, int post_uvstride,
unsigned char *y_ptr, unsigned char *u_ptr,
unsigned char *v_ptr) {
int mb_col;
int filter_level;
loop_filter_info_n *lfi_n = &cm->lf_info;
loop_filter_info lfi;
FRAME_TYPE frame_type = cm->frame_type;
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) {
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)
vp8_loop_filter_mbv(y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride,
&lfi);
if (!skip_lf)
vp8_loop_filter_bv(y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride,
&lfi);
/* don't apply across umv border */
if (mb_row > 0)
vp8_loop_filter_mbh(y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride,
&lfi);
if (!skip_lf)
vp8_loop_filter_bh(y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride,
&lfi);
}
y_ptr += 16;
u_ptr += 8;
v_ptr += 8;
mode_info_context++; /* step to next MB */
}
}
void vp8_loop_filter_row_simple(VP8_COMMON *cm, MODE_INFO *mode_info_context,
int mb_row, int post_ystride,
unsigned char *y_ptr) {
int mb_col;
int filter_level;
loop_filter_info_n *lfi_n = &cm->lf_info;
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 (mb_col > 0)
vp8_loop_filter_simple_mbv(y_ptr, post_ystride,
lfi_n->mblim[filter_level]);
if (!skip_lf)
vp8_loop_filter_simple_bv(y_ptr, post_ystride,
lfi_n->blim[filter_level]);
/* don't apply across umv border */
if (mb_row > 0)
vp8_loop_filter_simple_mbh(y_ptr, post_ystride,
lfi_n->mblim[filter_level]);
if (!skip_lf)
vp8_loop_filter_simple_bh(y_ptr, post_ystride,
lfi_n->blim[filter_level]);
}
y_ptr += 16;
mode_info_context++; /* step to next MB */
}
}
void vp8_loop_filter_frame(VP8_COMMON *cm, MACROBLOCKD *mbd, int frame_type) {
YV12_BUFFER_CONFIG *post = cm->frame_to_show;
loop_filter_info_n *lfi_n = &cm->lf_info;
loop_filter_info lfi;
int mb_row;
int mb_col;
int mb_rows = cm->mb_rows;
int mb_cols = cm->mb_cols;
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;
int post_y_stride = post->y_stride;
int post_uv_stride = post->uv_stride;
/* 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 */
if (cm->filter_type == NORMAL_LOOPFILTER) {
for (mb_row = 0; mb_row < mb_rows; ++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);
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) {
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)
vp8_loop_filter_mbv(y_ptr, u_ptr, v_ptr, post_y_stride,
post_uv_stride, &lfi);
if (!skip_lf)
vp8_loop_filter_bv(y_ptr, u_ptr, v_ptr, post_y_stride,
post_uv_stride, &lfi);
/* don't apply across umv border */
if (mb_row > 0)
vp8_loop_filter_mbh(y_ptr, u_ptr, v_ptr, post_y_stride,
post_uv_stride, &lfi);
if (!skip_lf)
vp8_loop_filter_bh(y_ptr, u_ptr, v_ptr, post_y_stride,
post_uv_stride, &lfi);
}
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 */
}
} else { /* SIMPLE_LOOPFILTER */
for (mb_row = 0; mb_row < mb_rows; ++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);
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) {
const unsigned char *mblim = lfi_n->mblim[filter_level];
const unsigned char *blim = lfi_n->blim[filter_level];
if (mb_col > 0)
vp8_loop_filter_simple_mbv(y_ptr, post_y_stride, mblim);
if (!skip_lf) vp8_loop_filter_simple_bv(y_ptr, post_y_stride, blim);
/* don't apply across umv border */
if (mb_row > 0)
vp8_loop_filter_simple_mbh(y_ptr, post_y_stride, mblim);
if (!skip_lf) vp8_loop_filter_simple_bh(y_ptr, post_y_stride, blim);
}
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)
vp8_loop_filter_mbv(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
vp8_loop_filter_bv(y_ptr, 0, 0, post->y_stride, 0, &lfi);
/* don't apply across umv border */
if (mb_row > 0)
vp8_loop_filter_mbh(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
vp8_loop_filter_bh(y_ptr, 0, 0, post->y_stride, 0, &lfi);
} else {
if (mb_col > 0)
vp8_loop_filter_simple_mbv(y_ptr, post->y_stride,
lfi_n->mblim[filter_level]);
if (!skip_lf)
vp8_loop_filter_simple_bv(y_ptr, post->y_stride,
lfi_n->blim[filter_level]);
/* don't apply across umv border */
if (mb_row > 0)
vp8_loop_filter_simple_mbh(y_ptr, post->y_stride,
lfi_n->mblim[filter_level]);
if (!skip_lf)
vp8_loop_filter_simple_bh(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 mb_rows = post->y_height >> 4;
int linestocopy;
loop_filter_info_n *lfi_n = &cm->lf_info;
loop_filter_info lfi;
int filter_level;
FRAME_TYPE frame_type = cm->frame_type;
const MODE_INFO *mode_info_context;
#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);
/* number of MB rows to use in partial filtering */
linestocopy = mb_rows / PARTIAL_FRAME_FRACTION;
linestocopy = linestocopy ? linestocopy << 4 : 16; /* 16 lines per MB */
/* Set up the buffer pointers; partial image starts at ~middle of frame */
y_ptr = post->y_buffer + ((post->y_height >> 5) * 16) * post->y_stride;
mode_info_context = cm->mi + (post->y_height >> 5) * (mb_cols + 1);
/* 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);
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)
vp8_loop_filter_mbv(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
vp8_loop_filter_bv(y_ptr, 0, 0, post->y_stride, 0, &lfi);
vp8_loop_filter_mbh(y_ptr, 0, 0, post->y_stride, 0, &lfi);
if (!skip_lf)
vp8_loop_filter_bh(y_ptr, 0, 0, post->y_stride, 0, &lfi);
} else {
if (mb_col > 0)
vp8_loop_filter_simple_mbv(y_ptr, post->y_stride,
lfi_n->mblim[filter_level]);
if (!skip_lf)
vp8_loop_filter_simple_bv(y_ptr, post->y_stride,
lfi_n->blim[filter_level]);
vp8_loop_filter_simple_mbh(y_ptr, post->y_stride,
lfi_n->mblim[filter_level]);
if (!skip_lf)
vp8_loop_filter_simple_bh(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 */
}
}