12bf0796e6
Clamp only the motion vectors inferred from neighboring reference macroblocks. The motion vectors obtained through motion search in NEWMV mode are constrained during the search process, which allows a relatively larger referencing region than the inferred mvs. Hence further clamping the best mv provided by the motion search may affect the efficacy of NEWMV mode. Synchronized the decoding process. The decoded mvs in NEWMV modes should be guaranteed to fit in the effective range. Put a mv range clamping function there for security purpose. This improves the coding performance of high motion sequences, e.g., derf set: foreman 0.233% husky 0.175% icd 0.135% mother_daughter 0.337% pamphlet 0.561% stdhd set: blue_sky 0.408% city 0.455% also saw sunflower goes down by -0.469%. Change-Id: I3fcbba669e56dab779857a8126a91b926e899cb5
202 lines
6.2 KiB
C
202 lines
6.2 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP9_COMMON_VP9_FINDNEARMV_H_
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#define VP9_COMMON_VP9_FINDNEARMV_H_
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#include "vp9/common/vp9_mv.h"
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#include "vp9/common/vp9_blockd.h"
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#include "vp9/common/vp9_treecoder.h"
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#include "vp9/common/vp9_onyxc_int.h"
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#define LEFT_TOP_MARGIN ((VP9BORDERINPIXELS - VP9_INTERP_EXTEND) << 3)
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#define RIGHT_BOTTOM_MARGIN ((VP9BORDERINPIXELS - VP9_INTERP_EXTEND) << 3)
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/* check a list of motion vectors by sad score using a number rows of pixels
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* above and a number cols of pixels in the left to select the one with best
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* score to use as ref motion vector
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*/
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void vp9_find_best_ref_mvs(MACROBLOCKD *xd,
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uint8_t *ref_y_buffer,
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int ref_y_stride,
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int_mv *mvlist,
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int_mv *nearest,
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int_mv *near);
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static void mv_bias(int refmb_ref_frame_sign_bias, int refframe,
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int_mv *mvp, const int *ref_frame_sign_bias) {
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MV xmv = mvp->as_mv;
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if (refmb_ref_frame_sign_bias != ref_frame_sign_bias[refframe]) {
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xmv.row *= -1;
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xmv.col *= -1;
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}
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mvp->as_mv = xmv;
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}
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// TODO(jingning): this mv clamping function should be block size dependent.
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static void clamp_mv(int_mv *mv,
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int mb_to_left_edge,
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int mb_to_right_edge,
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int mb_to_top_edge,
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int mb_to_bottom_edge) {
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mv->as_mv.col = (mv->as_mv.col < mb_to_left_edge) ?
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mb_to_left_edge : mv->as_mv.col;
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mv->as_mv.col = (mv->as_mv.col > mb_to_right_edge) ?
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mb_to_right_edge : mv->as_mv.col;
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mv->as_mv.row = (mv->as_mv.row < mb_to_top_edge) ?
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mb_to_top_edge : mv->as_mv.row;
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mv->as_mv.row = (mv->as_mv.row > mb_to_bottom_edge) ?
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mb_to_bottom_edge : mv->as_mv.row;
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}
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static int clamp_mv2(int_mv *mv, const MACROBLOCKD *xd) {
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int_mv tmp_mv;
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int mv_clampped = 0;
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tmp_mv.as_int = mv->as_int;
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clamp_mv(mv,
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xd->mb_to_left_edge - LEFT_TOP_MARGIN,
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xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN,
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xd->mb_to_top_edge - LEFT_TOP_MARGIN,
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xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN);
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if (tmp_mv.as_int != mv->as_int)
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mv_clampped = 1;
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return mv_clampped;
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}
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static unsigned int check_mv_bounds(int_mv *mv,
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int mb_to_left_edge,
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int mb_to_right_edge,
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int mb_to_top_edge,
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int mb_to_bottom_edge) {
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return mv->as_mv.col < mb_to_left_edge ||
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mv->as_mv.col > mb_to_right_edge ||
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mv->as_mv.row < mb_to_top_edge ||
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mv->as_mv.row > mb_to_bottom_edge;
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}
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vp9_prob *vp9_mv_ref_probs(VP9_COMMON *pc,
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vp9_prob p[VP9_MVREFS - 1],
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const int context);
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extern const uint8_t vp9_mbsplit_offset[4][16];
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static int left_block_mv(const MACROBLOCKD *xd,
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const MODE_INFO *cur_mb, int b) {
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if (!(b & 3)) {
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if (!xd->left_available)
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return 0;
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// On L edge, get from MB to left of us
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--cur_mb;
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if (cur_mb->mbmi.mode != SPLITMV)
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return cur_mb->mbmi.mv[0].as_int;
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b += 4;
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}
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return (cur_mb->bmi + b - 1)->as_mv[0].as_int;
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}
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static int left_block_second_mv(const MACROBLOCKD *xd,
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const MODE_INFO *cur_mb, int b) {
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if (!(b & 3)) {
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if (!xd->left_available)
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return 0;
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/* On L edge, get from MB to left of us */
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--cur_mb;
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if (cur_mb->mbmi.mode != SPLITMV)
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return cur_mb->mbmi.second_ref_frame > 0 ?
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cur_mb->mbmi.mv[1].as_int : cur_mb->mbmi.mv[0].as_int;
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b += 4;
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}
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return cur_mb->mbmi.second_ref_frame > 0 ?
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(cur_mb->bmi + b - 1)->as_mv[1].as_int :
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(cur_mb->bmi + b - 1)->as_mv[0].as_int;
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}
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static int above_block_mv(const MODE_INFO *cur_mb, int b, int mi_stride) {
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if (!(b >> 2)) {
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/* On top edge, get from MB above us */
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cur_mb -= mi_stride;
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if (cur_mb->mbmi.mode != SPLITMV)
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return cur_mb->mbmi.mv[0].as_int;
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b += 16;
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}
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return (cur_mb->bmi + b - 4)->as_mv[0].as_int;
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}
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static int above_block_second_mv(const MODE_INFO *cur_mb, int b, int mi_stride) {
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if (!(b >> 2)) {
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/* On top edge, get from MB above us */
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cur_mb -= mi_stride;
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if (cur_mb->mbmi.mode != SPLITMV)
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return cur_mb->mbmi.second_ref_frame > 0 ?
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cur_mb->mbmi.mv[1].as_int : cur_mb->mbmi.mv[0].as_int;
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b += 16;
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}
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return cur_mb->mbmi.second_ref_frame > 0 ?
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(cur_mb->bmi + b - 4)->as_mv[1].as_int :
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(cur_mb->bmi + b - 4)->as_mv[0].as_int;
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}
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static B_PREDICTION_MODE left_block_mode(const MODE_INFO *cur_mb, int b) {
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if (!(b & 3)) {
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/* On L edge, get from MB to left of us */
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--cur_mb;
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if (cur_mb->mbmi.mode < I8X8_PRED) {
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return pred_mode_conv(cur_mb->mbmi.mode);
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} else if (cur_mb->mbmi.mode == I8X8_PRED) {
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return pred_mode_conv(
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(MB_PREDICTION_MODE)(cur_mb->bmi + 3 + b)->as_mode.first);
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} else if (cur_mb->mbmi.mode == B_PRED) {
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return ((cur_mb->bmi + 3 + b)->as_mode.first);
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} else {
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return B_DC_PRED;
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}
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}
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return (cur_mb->bmi + b - 1)->as_mode.first;
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}
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static B_PREDICTION_MODE above_block_mode(const MODE_INFO *cur_mb,
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int b, int mi_stride) {
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if (!(b >> 2)) {
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/* On top edge, get from MB above us */
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cur_mb -= mi_stride;
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if (cur_mb->mbmi.mode < I8X8_PRED) {
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return pred_mode_conv(cur_mb->mbmi.mode);
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} else if (cur_mb->mbmi.mode == I8X8_PRED) {
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return pred_mode_conv(
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(MB_PREDICTION_MODE)(cur_mb->bmi + 12 + b)->as_mode.first);
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} else if (cur_mb->mbmi.mode == B_PRED) {
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return ((cur_mb->bmi + 12 + b)->as_mode.first);
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} else {
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return B_DC_PRED;
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}
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}
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return (cur_mb->bmi + b - 4)->as_mode.first;
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}
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#endif // VP9_COMMON_VP9_FINDNEARMV_H_
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