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08fd41ccd7
vpx/vp9/decoder/vp9_decodemv.c
Dmitry Kovalev 08fd41ccd7 Adding lookup table for size group. 
Change-Id: Ia6144d77ebed66e0739b62e4d673e26a95aa9550
2013-07-25 12:58:54 -07:00

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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 <assert.h>
#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_entropy.h"
#include "vp9/common/vp9_entropymode.h"
#include "vp9/common/vp9_entropymv.h"
#include "vp9/common/vp9_findnearmv.h"
#include "vp9/common/vp9_mvref_common.h"
#include "vp9/common/vp9_pred_common.h"
#include "vp9/common/vp9_reconinter.h"
#include "vp9/common/vp9_seg_common.h"
#include "vp9/decoder/vp9_decodemv.h"
#include "vp9/decoder/vp9_decodframe.h"
#include "vp9/decoder/vp9_onyxd_int.h"
#include "vp9/decoder/vp9_dsubexp.h"
#include "vp9/decoder/vp9_treereader.h"
static MB_PREDICTION_MODE read_intra_mode(vp9_reader *r, const vp9_prob *p) {
return (MB_PREDICTION_MODE)treed_read(r, vp9_intra_mode_tree, p);
}
static MB_PREDICTION_MODE read_inter_mode(vp9_reader *r, const vp9_prob *p) {
return (MB_PREDICTION_MODE)treed_read(r, vp9_inter_mode_tree, p);
}
static int read_segment_id(vp9_reader *r, const struct segmentation *seg) {
return treed_read(r, vp9_segment_tree, seg->tree_probs);
}
static TX_SIZE read_selected_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd,
BLOCK_SIZE_TYPE bsize, vp9_reader *r) {
const uint8_t context = vp9_get_pred_context_tx_size(xd);
const vp9_prob *tx_probs = get_tx_probs(bsize, context, &cm->fc.tx_probs);
TX_SIZE tx_size = vp9_read(r, tx_probs[0]);
if (tx_size != TX_4X4 && bsize >= BLOCK_SIZE_MB16X16) {
tx_size += vp9_read(r, tx_probs[1]);
if (tx_size != TX_8X8 && bsize >= BLOCK_SIZE_SB32X32)
tx_size += vp9_read(r, tx_probs[2]);
}
update_tx_counts(bsize, context, tx_size, &cm->counts.tx);
return tx_size;
}
static TX_SIZE read_tx_size(VP9D_COMP *pbi, TX_MODE tx_mode,
BLOCK_SIZE_TYPE bsize, int select_cond,
vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
if (tx_mode == TX_MODE_SELECT && bsize >= BLOCK_SIZE_SB8X8 && select_cond)
return read_selected_tx_size(cm, xd, bsize, r);
else if (tx_mode >= ALLOW_32X32 && bsize >= BLOCK_SIZE_SB32X32)
return TX_32X32;
else if (tx_mode >= ALLOW_16X16 && bsize >= BLOCK_SIZE_MB16X16)
return TX_16X16;
else if (tx_mode >= ALLOW_8X8 && bsize >= BLOCK_SIZE_SB8X8)
return TX_8X8;
else
return TX_4X4;
}
static void set_segment_id(VP9_COMMON *cm, BLOCK_SIZE_TYPE bsize,
int mi_row, int mi_col, int segment_id) {
const int mi_offset = mi_row * cm->mi_cols + mi_col;
const int bw = 1 << mi_width_log2(bsize);
const int bh = 1 << mi_height_log2(bsize);
const int xmis = MIN(cm->mi_cols - mi_col, bw);
const int ymis = MIN(cm->mi_rows - mi_row, bh);
int x, y;
assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);
for (y = 0; y < ymis; y++)
for (x = 0; x < xmis; x++)
cm->last_frame_seg_map[mi_offset + y * cm->mi_cols + x] = segment_id;
}
static int read_intra_segment_id(VP9D_COMP *pbi, int mi_row, int mi_col,
vp9_reader *r) {
MACROBLOCKD *const xd = &pbi->mb;
struct segmentation *const seg = &xd->seg;
const BLOCK_SIZE_TYPE bsize = xd->mode_info_context->mbmi.sb_type;
int segment_id;
if (!seg->enabled)
return 0; // Default for disabled segmentation
if (!seg->update_map)
return 0;
segment_id = read_segment_id(r, seg);
set_segment_id(&pbi->common, bsize, mi_row, mi_col, segment_id);
return segment_id;
}
static int read_inter_segment_id(VP9D_COMP *pbi, int mi_row, int mi_col,
vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
struct segmentation *const seg = &xd->seg;
const BLOCK_SIZE_TYPE bsize = xd->mode_info_context->mbmi.sb_type;
int pred_segment_id, segment_id;
if (!seg->enabled)
return 0; // Default for disabled segmentation
pred_segment_id = vp9_get_segment_id(cm, cm->last_frame_seg_map,
bsize, mi_row, mi_col);
if (!seg->update_map)
return pred_segment_id;
if (seg->temporal_update) {
const vp9_prob pred_prob = vp9_get_pred_prob_seg_id(xd);
const int pred_flag = vp9_read(r, pred_prob);
vp9_set_pred_flag_seg_id(cm, bsize, mi_row, mi_col, pred_flag);
segment_id = pred_flag ? pred_segment_id
: read_segment_id(r, seg);
} else {
segment_id = read_segment_id(r, seg);
}
set_segment_id(cm, bsize, mi_row, mi_col, segment_id);
return segment_id;
}
static uint8_t read_skip_coeff(VP9D_COMP *pbi, int segment_id, vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
int skip_coeff = vp9_segfeature_active(&xd->seg, segment_id, SEG_LVL_SKIP);
if (!skip_coeff) {
const int ctx = vp9_get_pred_context_mbskip(xd);
skip_coeff = vp9_read(r, vp9_get_pred_prob_mbskip(cm, xd));
cm->counts.mbskip[ctx][skip_coeff]++;
}
return skip_coeff;
}
static void read_intra_mode_info(VP9D_COMP *pbi, MODE_INFO *m,
int mi_row, int mi_col, vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
MB_MODE_INFO *const mbmi = &m->mbmi;
const BLOCK_SIZE_TYPE bsize = mbmi->sb_type;
const int mis = cm->mode_info_stride;
mbmi->segment_id = read_intra_segment_id(pbi, mi_row, mi_col, r);
mbmi->mb_skip_coeff = read_skip_coeff(pbi, mbmi->segment_id, r);
mbmi->txfm_size = read_tx_size(pbi, cm->tx_mode, bsize, 1, r);
mbmi->ref_frame[0] = INTRA_FRAME;
if (bsize >= BLOCK_SIZE_SB8X8) {
const MB_PREDICTION_MODE A = above_block_mode(m, 0, mis);
const MB_PREDICTION_MODE L = xd->left_available ?
left_block_mode(m, 0) : DC_PRED;
mbmi->mode = read_intra_mode(r, vp9_kf_y_mode_prob[A][L]);
} else {
// Only 4x4, 4x8, 8x4 blocks
const int bw = 1 << b_width_log2(bsize);
const int bh = 1 << b_height_log2(bsize);
int idx, idy;
for (idy = 0; idy < 2; idy += bh) {
for (idx = 0; idx < 2; idx += bw) {
const int ib = idy * 2 + idx;
const MB_PREDICTION_MODE A = above_block_mode(m, ib, mis);
const MB_PREDICTION_MODE L = (xd->left_available || idx) ?
left_block_mode(m, ib) : DC_PRED;
const MB_PREDICTION_MODE b_mode = read_intra_mode(r,
vp9_kf_y_mode_prob[A][L]);
m->bmi[ib].as_mode = b_mode;
if (bh == 2)
m->bmi[ib + 2].as_mode = b_mode;
if (bw == 2)
m->bmi[ib + 1].as_mode = b_mode;
}
}
mbmi->mode = m->bmi[3].as_mode;
}
mbmi->uv_mode = read_intra_mode(r, vp9_kf_uv_mode_prob[mbmi->mode]);
}
static int read_mv_component(vp9_reader *r,
const nmv_component *mvcomp, int usehp) {
int mag, d, fr, hp;
const int sign = vp9_read(r, mvcomp->sign);
const int mv_class = treed_read(r, vp9_mv_class_tree, mvcomp->classes);
const int class0 = mv_class == MV_CLASS_0;
// Integer part
if (class0) {
d = treed_read(r, vp9_mv_class0_tree, mvcomp->class0);
} else {
int i;
const int n = mv_class + CLASS0_BITS - 1; // number of bits
d = 0;
for (i = 0; i < n; ++i)
d |= vp9_read(r, mvcomp->bits[i]) << i;
}
// Fractional part
fr = treed_read(r, vp9_mv_fp_tree,
class0 ? mvcomp->class0_fp[d] : mvcomp->fp);
// High precision part (if hp is not used, the default value of the hp is 1)
hp = usehp ? vp9_read(r, class0 ? mvcomp->class0_hp : mvcomp->hp)
: 1;
// Result
mag = vp9_get_mv_mag(mv_class, (d << 3) | (fr << 1) | hp) + 1;
return sign ? -mag : mag;
}
static INLINE void read_mv(vp9_reader *r, MV *mv, const MV *ref,
const nmv_context *ctx,
nmv_context_counts *counts, int usehp) {
const MV_JOINT_TYPE j = treed_read(r, vp9_mv_joint_tree, ctx->joints);
MV diff = {0, 0};
usehp = usehp && vp9_use_mv_hp(ref);
if (mv_joint_vertical(j))
diff.row = read_mv_component(r, &ctx->comps[0], usehp);
if (mv_joint_horizontal(j))
diff.col = read_mv_component(r, &ctx->comps[1], usehp);
vp9_inc_mv(&diff, counts);
mv->row = ref->row + diff.row;
mv->col = ref->col + diff.col;
}
static void update_mv(vp9_reader *r, vp9_prob *p, vp9_prob upd_p) {
if (vp9_read(r, upd_p))
*p = (vp9_read_literal(r, 7) << 1) | 1;
}
static void read_mv_probs(vp9_reader *r, nmv_context *mvc, int usehp) {
int i, j, k;
for (j = 0; j < MV_JOINTS - 1; ++j)
update_mv(r, &mvc->joints[j], VP9_NMV_UPDATE_PROB);
for (i = 0; i < 2; ++i) {
nmv_component *const comp = &mvc->comps[i];
update_mv(r, &comp->sign, VP9_NMV_UPDATE_PROB);
for (j = 0; j < MV_CLASSES - 1; ++j)
update_mv(r, &comp->classes[j], VP9_NMV_UPDATE_PROB);
for (j = 0; j < CLASS0_SIZE - 1; ++j)
update_mv(r, &comp->class0[j], VP9_NMV_UPDATE_PROB);
for (j = 0; j < MV_OFFSET_BITS; ++j)
update_mv(r, &comp->bits[j], VP9_NMV_UPDATE_PROB);
}
for (i = 0; i < 2; ++i) {
nmv_component *const comp = &mvc->comps[i];
for (j = 0; j < CLASS0_SIZE; ++j)
for (k = 0; k < 3; ++k)
update_mv(r, &comp->class0_fp[j][k], VP9_NMV_UPDATE_PROB);
for (j = 0; j < 3; ++j)
update_mv(r, &comp->fp[j], VP9_NMV_UPDATE_PROB);
}
if (usehp) {
for (i = 0; i < 2; ++i) {
update_mv(r, &mvc->comps[i].class0_hp, VP9_NMV_UPDATE_PROB);
update_mv(r, &mvc->comps[i].hp, VP9_NMV_UPDATE_PROB);
}
}
}
// Read the referncence frame
static void read_ref_frame(VP9D_COMP *pbi, vp9_reader *r,
int segment_id, MV_REFERENCE_FRAME ref_frame[2]) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
FRAME_CONTEXT *const fc = &cm->fc;
FRAME_COUNTS *const counts = &cm->counts;
if (vp9_segfeature_active(&xd->seg, segment_id, SEG_LVL_REF_FRAME)) {
ref_frame[0] = vp9_get_segdata(&xd->seg, segment_id, SEG_LVL_REF_FRAME);
ref_frame[1] = NONE;
} else {
const int comp_ctx = vp9_get_pred_context_comp_inter_inter(cm, xd);
int is_comp;
if (cm->comp_pred_mode == HYBRID_PREDICTION) {
is_comp = vp9_read(r, fc->comp_inter_prob[comp_ctx]);
counts->comp_inter[comp_ctx][is_comp]++;
} else {
is_comp = cm->comp_pred_mode == COMP_PREDICTION_ONLY;
}
// FIXME(rbultje) I'm pretty sure this breaks segmentation ref frame coding
if (is_comp) {
const int fix_ref_idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
const int ref_ctx = vp9_get_pred_context_comp_ref_p(cm, xd);
const int b = vp9_read(r, fc->comp_ref_prob[ref_ctx]);
counts->comp_ref[ref_ctx][b]++;
ref_frame[fix_ref_idx] = cm->comp_fixed_ref;
ref_frame[!fix_ref_idx] = cm->comp_var_ref[b];
} else {
const int ref1_ctx = vp9_get_pred_context_single_ref_p1(xd);
ref_frame[1] = NONE;
if (vp9_read(r, fc->single_ref_prob[ref1_ctx][0])) {
const int ref2_ctx = vp9_get_pred_context_single_ref_p2(xd);
const int b = vp9_read(r, fc->single_ref_prob[ref2_ctx][1]);
ref_frame[0] = b ? ALTREF_FRAME : GOLDEN_FRAME;
counts->single_ref[ref1_ctx][0][1]++;
counts->single_ref[ref2_ctx][1][b]++;
} else {
ref_frame[0] = LAST_FRAME;
counts->single_ref[ref1_ctx][0][0]++;
}
}
}
}
static void read_switchable_interp_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
int i, j;
for (j = 0; j < VP9_SWITCHABLE_FILTERS + 1; ++j)
for (i = 0; i < VP9_SWITCHABLE_FILTERS - 1; ++i)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &fc->switchable_interp_prob[j][i]);
}
static void read_inter_mode_probs(FRAME_CONTEXT *fc, vp9_reader *r) {
int i, j;
for (i = 0; i < INTER_MODE_CONTEXTS; ++i)
for (j = 0; j < VP9_INTER_MODES - 1; ++j)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &fc->inter_mode_probs[i][j]);
}
static INLINE COMPPREDMODE_TYPE read_comp_pred_mode(vp9_reader *r) {
COMPPREDMODE_TYPE mode = vp9_read_bit(r);
if (mode)
mode += vp9_read_bit(r);
return mode;
}
static INLINE void assign_and_clamp_mv(int_mv *dst, const int_mv *src,
int mb_to_left_edge,
int mb_to_right_edge,
int mb_to_top_edge,
int mb_to_bottom_edge) {
dst->as_int = src->as_int;
clamp_mv(dst, mb_to_left_edge, mb_to_right_edge, mb_to_top_edge,
mb_to_bottom_edge);
}
static INLINE INTERPOLATIONFILTERTYPE read_switchable_filter_type(
VP9D_COMP *pbi, vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
const vp9_prob *probs = vp9_get_pred_probs_switchable_interp(cm, xd);
const int index = treed_read(r, vp9_switchable_interp_tree, probs);
const int ctx = vp9_get_pred_context_switchable_interp(xd);
++cm->counts.switchable_interp[ctx][index];
return vp9_switchable_interp[index];
}
static void read_intra_block_modes(VP9D_COMP *pbi, MODE_INFO *mi,
vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MB_MODE_INFO *const mbmi = &mi->mbmi;
const BLOCK_SIZE_TYPE bsize = mi->mbmi.sb_type;
if (bsize >= BLOCK_SIZE_SB8X8) {
const int size_group = size_group_lookup[bsize];
mbmi->mode = read_intra_mode(r, cm->fc.y_mode_prob[size_group]);
cm->counts.y_mode[size_group][mbmi->mode]++;
} else {
// Only 4x4, 4x8, 8x4 blocks
const int bw = 1 << b_width_log2(bsize), bh = 1 << b_height_log2(bsize);
int idx, idy;
for (idy = 0; idy < 2; idy += bh) {
for (idx = 0; idx < 2; idx += bw) {
const int ib = idy * 2 + idx;
const int b_mode = read_intra_mode(r, cm->fc.y_mode_prob[0]);
mi->bmi[ib].as_mode = b_mode;
cm->counts.y_mode[0][b_mode]++;
if (bh == 2)
mi->bmi[ib + 2].as_mode = b_mode;
if (bw == 2)
mi->bmi[ib + 1].as_mode = b_mode;
}
}
mbmi->mode = mi->bmi[3].as_mode;
}
mbmi->uv_mode = read_intra_mode(r, cm->fc.uv_mode_prob[mbmi->mode]);
cm->counts.uv_mode[mbmi->mode][mbmi->uv_mode]++;
}
static MV_REFERENCE_FRAME read_reference_frame(VP9D_COMP *pbi, int segment_id,
vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
MV_REFERENCE_FRAME ref;
if (!vp9_segfeature_active(&xd->seg, segment_id, SEG_LVL_REF_FRAME)) {
const int ctx = vp9_get_pred_context_intra_inter(xd);
ref = (MV_REFERENCE_FRAME)
vp9_read(r, vp9_get_pred_prob_intra_inter(cm, xd));
cm->counts.intra_inter[ctx][ref != INTRA_FRAME]++;
} else {
ref = (MV_REFERENCE_FRAME) vp9_get_segdata(&xd->seg, segment_id,
SEG_LVL_REF_FRAME) != INTRA_FRAME;
}
return ref;
}
static void read_inter_mode_info(VP9D_COMP *pbi, MODE_INFO *mi,
int mi_row, int mi_col, vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
nmv_context *const nmvc = &cm->fc.nmvc;
MB_MODE_INFO *const mbmi = &mi->mbmi;
int_mv *const mv0 = &mbmi->mv[0];
int_mv *const mv1 = &mbmi->mv[1];
const BLOCK_SIZE_TYPE bsize = mi->mbmi.sb_type;
const int bw = 1 << b_width_log2(bsize);
const int bh = 1 << b_height_log2(bsize);
int idx, idy;
mbmi->segment_id = read_inter_segment_id(pbi, mi_row, mi_col, r);
mbmi->mb_skip_coeff = read_skip_coeff(pbi, mbmi->segment_id, r);
mbmi->ref_frame[0] = read_reference_frame(pbi, mbmi->segment_id, r);
mbmi->ref_frame[1] = NONE;
mbmi->txfm_size = read_tx_size(pbi, cm->tx_mode, bsize,
(!mbmi->mb_skip_coeff || mbmi->ref_frame[0] == INTRA_FRAME), r);
if (mbmi->ref_frame[0] != INTRA_FRAME) {
int_mv nearest, nearby, best_mv;
int_mv nearest_second, nearby_second, best_mv_second;
vp9_prob *mv_ref_p;
MV_REFERENCE_FRAME ref0, ref1;
read_ref_frame(pbi, r, mbmi->segment_id, mbmi->ref_frame);
ref0 = mbmi->ref_frame[0];
ref1 = mbmi->ref_frame[1];
vp9_find_mv_refs(cm, xd, mi, xd->prev_mode_info_context,
ref0, mbmi->ref_mvs[ref0], cm->ref_frame_sign_bias);
mv_ref_p = cm->fc.inter_mode_probs[mbmi->mb_mode_context[ref0]];
if (vp9_segfeature_active(&xd->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
mbmi->mode = ZEROMV;
} else if (bsize >= BLOCK_SIZE_SB8X8) {
mbmi->mode = read_inter_mode(r, mv_ref_p);
vp9_accum_mv_refs(cm, mbmi->mode, mbmi->mb_mode_context[ref0]);
}
mbmi->uv_mode = DC_PRED;
// nearest, nearby
if (bsize < BLOCK_SIZE_SB8X8 || mbmi->mode != ZEROMV) {
vp9_find_best_ref_mvs(xd, mbmi->ref_mvs[ref0], &nearest, &nearby);
best_mv.as_int = mbmi->ref_mvs[ref0][0].as_int;
}
mbmi->interp_filter = cm->mcomp_filter_type == SWITCHABLE
? read_switchable_filter_type(pbi, r)
: cm->mcomp_filter_type;
if (ref1 > INTRA_FRAME) {
vp9_find_mv_refs(cm, xd, mi, xd->prev_mode_info_context,
ref1, mbmi->ref_mvs[ref1], cm->ref_frame_sign_bias);
if (bsize < BLOCK_SIZE_SB8X8 || mbmi->mode != ZEROMV) {
vp9_find_best_ref_mvs(xd, mbmi->ref_mvs[ref1],
&nearest_second, &nearby_second);
best_mv_second.as_int = mbmi->ref_mvs[ref1][0].as_int;
}
}
if (mbmi->sb_type < BLOCK_SIZE_SB8X8) {
for (idy = 0; idy < 2; idy += bh) {
for (idx = 0; idx < 2; idx += bw) {
int_mv blockmv, secondmv;
const int j = idy * 2 + idx;
const int blockmode = read_inter_mode(r, mv_ref_p);
vp9_accum_mv_refs(cm, blockmode, mbmi->mb_mode_context[ref0]);
if (blockmode == NEARESTMV || blockmode == NEARMV) {
vp9_append_sub8x8_mvs_for_idx(cm, xd, &nearest, &nearby, j, 0);
if (ref1 > 0)
vp9_append_sub8x8_mvs_for_idx(cm, xd, &nearest_second,
&nearby_second, j, 1);
}
switch (blockmode) {
case NEWMV:
read_mv(r, &blockmv.as_mv, &best_mv.as_mv, nmvc,
&cm->counts.mv, xd->allow_high_precision_mv);
if (ref1 > 0)
read_mv(r, &secondmv.as_mv, &best_mv_second.as_mv, nmvc,
&cm->counts.mv, xd->allow_high_precision_mv);
break;
case NEARESTMV:
blockmv.as_int = nearest.as_int;
if (ref1 > 0)
secondmv.as_int = nearest_second.as_int;
break;
case NEARMV:
blockmv.as_int = nearby.as_int;
if (ref1 > 0)
secondmv.as_int = nearby_second.as_int;
break;
case ZEROMV:
blockmv.as_int = 0;
if (ref1 > 0)
secondmv.as_int = 0;
break;
default:
assert(!"Invalid inter mode value");
}
mi->bmi[j].as_mv[0].as_int = blockmv.as_int;
if (ref1 > 0)
mi->bmi[j].as_mv[1].as_int = secondmv.as_int;
if (bh == 2)
mi->bmi[j + 2] = mi->bmi[j];
if (bw == 2)
mi->bmi[j + 1] = mi->bmi[j];
mi->mbmi.mode = blockmode;
}
}
mv0->as_int = mi->bmi[3].as_mv[0].as_int;
mv1->as_int = mi->bmi[3].as_mv[1].as_int;
} else {
const int mb_to_top_edge = xd->mb_to_top_edge - LEFT_TOP_MARGIN;
const int mb_to_bottom_edge = xd->mb_to_bottom_edge + RIGHT_BOTTOM_MARGIN;
const int mb_to_left_edge = xd->mb_to_left_edge - LEFT_TOP_MARGIN;
const int mb_to_right_edge = xd->mb_to_right_edge + RIGHT_BOTTOM_MARGIN;
switch (mbmi->mode) {
case NEARMV:
// Clip "next_nearest" so that it does not extend to far out of image
assign_and_clamp_mv(mv0, &nearby, mb_to_left_edge,
mb_to_right_edge,
mb_to_top_edge,
mb_to_bottom_edge);
if (ref1 > 0)
assign_and_clamp_mv(mv1, &nearby_second, mb_to_left_edge,
mb_to_right_edge,
mb_to_top_edge,
mb_to_bottom_edge);
break;
case NEARESTMV:
// Clip "next_nearest" so that it does not extend to far out of image
assign_and_clamp_mv(mv0, &nearest, mb_to_left_edge,
mb_to_right_edge,
mb_to_top_edge,
mb_to_bottom_edge);
if (ref1 > 0)
assign_and_clamp_mv(mv1, &nearest_second, mb_to_left_edge,
mb_to_right_edge,
mb_to_top_edge,
mb_to_bottom_edge);
break;
case ZEROMV:
mv0->as_int = 0;
if (ref1 > 0)
mv1->as_int = 0;
break;
case NEWMV:
read_mv(r, &mv0->as_mv, &best_mv.as_mv, nmvc, &cm->counts.mv,
xd->allow_high_precision_mv);
if (ref1 > 0)
read_mv(r, &mv1->as_mv, &best_mv_second.as_mv, nmvc,
&cm->counts.mv, xd->allow_high_precision_mv);
break;
default:
assert(!"Invalid inter mode value");
}
}
} else {
mv0->as_int = 0; // required for left and above block mv
read_intra_block_modes(pbi, mi, r);
}
}
static void read_comp_pred(VP9_COMMON *cm, vp9_reader *r) {
int i;
cm->comp_pred_mode = cm->allow_comp_inter_inter ? read_comp_pred_mode(r)
: SINGLE_PREDICTION_ONLY;
if (cm->comp_pred_mode == HYBRID_PREDICTION)
for (i = 0; i < COMP_INTER_CONTEXTS; i++)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.comp_inter_prob[i]);
if (cm->comp_pred_mode != COMP_PREDICTION_ONLY)
for (i = 0; i < REF_CONTEXTS; i++) {
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][0]);
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.single_ref_prob[i][1]);
}
if (cm->comp_pred_mode != SINGLE_PREDICTION_ONLY)
for (i = 0; i < REF_CONTEXTS; i++)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.comp_ref_prob[i]);
}
void vp9_prepare_read_mode_info(VP9D_COMP* pbi, vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
int k;
// TODO(jkoleszar): does this clear more than MBSKIP_CONTEXTS? Maybe remove.
// vpx_memset(cm->fc.mbskip_probs, 0, sizeof(cm->fc.mbskip_probs));
for (k = 0; k < MBSKIP_CONTEXTS; ++k)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.mbskip_probs[k]);
if (cm->frame_type != KEY_FRAME && !cm->intra_only) {
nmv_context *const nmvc = &pbi->common.fc.nmvc;
MACROBLOCKD *const xd = &pbi->mb;
int i, j;
read_inter_mode_probs(&cm->fc, r);
if (cm->mcomp_filter_type == SWITCHABLE)
read_switchable_interp_probs(&cm->fc, r);
for (i = 0; i < INTRA_INTER_CONTEXTS; i++)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.intra_inter_prob[i]);
read_comp_pred(cm, r);
for (j = 0; j < BLOCK_SIZE_GROUPS; j++)
for (i = 0; i < VP9_INTRA_MODES - 1; ++i)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.y_mode_prob[j][i]);
for (j = 0; j < NUM_PARTITION_CONTEXTS; ++j)
for (i = 0; i < PARTITION_TYPES - 1; ++i)
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
vp9_diff_update_prob(r, &cm->fc.partition_prob[INTER_FRAME][j][i]);
read_mv_probs(r, nmvc, xd->allow_high_precision_mv);
}
}
void vp9_read_mode_info(VP9D_COMP* pbi, int mi_row, int mi_col, vp9_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MACROBLOCKD *const xd = &pbi->mb;
MODE_INFO *mi = xd->mode_info_context;
const BLOCK_SIZE_TYPE bsize = mi->mbmi.sb_type;
const int bw = 1 << mi_width_log2(bsize);
const int bh = 1 << mi_height_log2(bsize);
const int y_mis = MIN(bh, cm->mi_rows - mi_row);
const int x_mis = MIN(bw, cm->mi_cols - mi_col);
int x, y;
if (cm->frame_type == KEY_FRAME || cm->intra_only)
read_intra_mode_info(pbi, mi, mi_row, mi_col, r);
else
read_inter_mode_info(pbi, mi, mi_row, mi_col, r);
for (y = 0; y < y_mis; y++)
for (x = !y; x < x_mis; x++)
mi[y * cm->mode_info_stride + x] = *mi;
}
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