ref: 13dc6d671ccd88a8af021b1b682400bf16b6c7c6
dir: /vp8/encoder/mr_dissim.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 <limits.h>
#include "vpx_config.h"
#include "onyx_int.h"
#include "mr_dissim.h"
#include "vpx_dsp/vpx_dsp_common.h"
#include "vpx_mem/vpx_mem.h"
#include "rdopt.h"
#include "vp8/common/common.h"
void vp8_cal_low_res_mb_cols(VP8_COMP *cpi) {
int low_res_w;
/* Support arbitrary down-sampling factor */
unsigned int iw = cpi->oxcf.Width * cpi->oxcf.mr_down_sampling_factor.den +
cpi->oxcf.mr_down_sampling_factor.num - 1;
low_res_w = iw / cpi->oxcf.mr_down_sampling_factor.num;
cpi->mr_low_res_mb_cols = ((low_res_w + 15) >> 4);
}
#define GET_MV(x) \
if (x->mbmi.ref_frame != INTRA_FRAME) { \
mvx[cnt] = x->mbmi.mv.as_mv.row; \
mvy[cnt] = x->mbmi.mv.as_mv.col; \
cnt++; \
}
#define GET_MV_SIGN(x) \
if (x->mbmi.ref_frame != INTRA_FRAME) { \
mvx[cnt] = x->mbmi.mv.as_mv.row; \
mvy[cnt] = x->mbmi.mv.as_mv.col; \
if (cm->ref_frame_sign_bias[x->mbmi.ref_frame] != \
cm->ref_frame_sign_bias[tmp->mbmi.ref_frame]) { \
mvx[cnt] *= -1; \
mvy[cnt] *= -1; \
} \
cnt++; \
}
void vp8_cal_dissimilarity(VP8_COMP *cpi) {
VP8_COMMON *cm = &cpi->common;
int i;
/* Note: The first row & first column in mip are outside the frame, which
* were initialized to all 0.(ref_frame, mode, mv...)
* Their ref_frame = 0 means they won't be counted in the following
* calculation.
*/
if (cpi->oxcf.mr_total_resolutions > 1 &&
cpi->oxcf.mr_encoder_id < (cpi->oxcf.mr_total_resolutions - 1)) {
/* Store info for show/no-show frames for supporting alt_ref.
* If parent frame is alt_ref, child has one too.
*/
LOWER_RES_FRAME_INFO *store_info =
(LOWER_RES_FRAME_INFO *)cpi->oxcf.mr_low_res_mode_info;
store_info->frame_type = cm->frame_type;
if (cm->frame_type != KEY_FRAME) {
store_info->is_frame_dropped = 0;
for (i = 1; i < MAX_REF_FRAMES; ++i)
store_info->low_res_ref_frames[i] = cpi->current_ref_frames[i];
}
if (cm->frame_type != KEY_FRAME) {
int mb_row;
int mb_col;
/* Point to beginning of allocated MODE_INFO arrays. */
MODE_INFO *tmp = cm->mip + cm->mode_info_stride;
LOWER_RES_MB_INFO *store_mode_info = store_info->mb_info;
for (mb_row = 0; mb_row < cm->mb_rows; ++mb_row) {
tmp++;
for (mb_col = 0; mb_col < cm->mb_cols; ++mb_col) {
int dissim = INT_MAX;
if (tmp->mbmi.ref_frame != INTRA_FRAME) {
int mvx[8];
int mvy[8];
int mmvx;
int mmvy;
int cnt = 0;
const MODE_INFO *here = tmp;
const MODE_INFO *above = here - cm->mode_info_stride;
const MODE_INFO *left = here - 1;
const MODE_INFO *aboveleft = above - 1;
const MODE_INFO *aboveright = NULL;
const MODE_INFO *right = NULL;
const MODE_INFO *belowleft = NULL;
const MODE_INFO *below = NULL;
const MODE_INFO *belowright = NULL;
/* If alternate reference frame is used, we have to
* check sign of MV. */
if (cpi->oxcf.play_alternate) {
/* Gather mv of neighboring MBs */
GET_MV_SIGN(above)
GET_MV_SIGN(left)
GET_MV_SIGN(aboveleft)
if (mb_col < (cm->mb_cols - 1)) {
right = here + 1;
aboveright = above + 1;
GET_MV_SIGN(right)
GET_MV_SIGN(aboveright)
}
if (mb_row < (cm->mb_rows - 1)) {
below = here + cm->mode_info_stride;
belowleft = below - 1;
GET_MV_SIGN(below)
GET_MV_SIGN(belowleft)
}
if (mb_col < (cm->mb_cols - 1) && mb_row < (cm->mb_rows - 1)) {
belowright = below + 1;
GET_MV_SIGN(belowright)
}
} else {
/* No alt_ref and gather mv of neighboring MBs */
GET_MV(above)
GET_MV(left)
GET_MV(aboveleft)
if (mb_col < (cm->mb_cols - 1)) {
right = here + 1;
aboveright = above + 1;
GET_MV(right)
GET_MV(aboveright)
}
if (mb_row < (cm->mb_rows - 1)) {
below = here + cm->mode_info_stride;
belowleft = below - 1;
GET_MV(below)
GET_MV(belowleft)
}
if (mb_col < (cm->mb_cols - 1) && mb_row < (cm->mb_rows - 1)) {
belowright = below + 1;
GET_MV(belowright)
}
}
if (cnt > 0) {
int max_mvx = mvx[0];
int min_mvx = mvx[0];
int max_mvy = mvy[0];
int min_mvy = mvy[0];
int i;
if (cnt > 1) {
for (i = 1; i < cnt; ++i) {
if (mvx[i] > max_mvx)
max_mvx = mvx[i];
else if (mvx[i] < min_mvx)
min_mvx = mvx[i];
if (mvy[i] > max_mvy)
max_mvy = mvy[i];
else if (mvy[i] < min_mvy)
min_mvy = mvy[i];
}
}
mmvx = VPXMAX(abs(min_mvx - here->mbmi.mv.as_mv.row),
abs(max_mvx - here->mbmi.mv.as_mv.row));
mmvy = VPXMAX(abs(min_mvy - here->mbmi.mv.as_mv.col),
abs(max_mvy - here->mbmi.mv.as_mv.col));
dissim = VPXMAX(mmvx, mmvy);
}
}
/* Store mode info for next resolution encoding */
store_mode_info->mode = tmp->mbmi.mode;
store_mode_info->ref_frame = tmp->mbmi.ref_frame;
store_mode_info->mv.as_int = tmp->mbmi.mv.as_int;
store_mode_info->dissim = dissim;
tmp++;
store_mode_info++;
}
}
}
}
}
/* This function is called only when this frame is dropped at current
resolution level. */
void vp8_store_drop_frame_info(VP8_COMP *cpi) {
/* If the frame is dropped in lower-resolution encoding, this information
is passed to higher resolution level so that the encoder knows there
is no mode & motion info available.
*/
if (cpi->oxcf.mr_total_resolutions > 1 &&
cpi->oxcf.mr_encoder_id < (cpi->oxcf.mr_total_resolutions - 1)) {
/* Store info for show/no-show frames for supporting alt_ref.
* If parent frame is alt_ref, child has one too.
*/
LOWER_RES_FRAME_INFO *store_info =
(LOWER_RES_FRAME_INFO *)cpi->oxcf.mr_low_res_mode_info;
/* Set frame_type to be INTER_FRAME since we won't drop key frame. */
store_info->frame_type = INTER_FRAME;
store_info->is_frame_dropped = 1;
}
}