ref: 5dccce558c9e5a77e19a794e0cca1f7c918dbe6c
dir: /vp9/decoder/vp9_decodemv.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 <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_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_decodeframe.h"
static PREDICTION_MODE read_intra_mode(vpx_reader *r, const vpx_prob *p) {
return (PREDICTION_MODE)vpx_read_tree(r, vp9_intra_mode_tree, p);
}
static PREDICTION_MODE read_intra_mode_y(VP9_COMMON *cm, MACROBLOCKD *xd,
vpx_reader *r, int size_group) {
const PREDICTION_MODE y_mode =
read_intra_mode(r, cm->fc->y_mode_prob[size_group]);
FRAME_COUNTS *counts = xd->counts;
if (counts)
++counts->y_mode[size_group][y_mode];
return y_mode;
}
static PREDICTION_MODE read_intra_mode_uv(VP9_COMMON *cm, MACROBLOCKD *xd,
vpx_reader *r,
PREDICTION_MODE y_mode) {
const PREDICTION_MODE uv_mode = read_intra_mode(r,
cm->fc->uv_mode_prob[y_mode]);
FRAME_COUNTS *counts = xd->counts;
if (counts)
++counts->uv_mode[y_mode][uv_mode];
return uv_mode;
}
static PREDICTION_MODE read_inter_mode(VP9_COMMON *cm, MACROBLOCKD *xd,
vpx_reader *r, int ctx) {
const int mode = vpx_read_tree(r, vp9_inter_mode_tree,
cm->fc->inter_mode_probs[ctx]);
FRAME_COUNTS *counts = xd->counts;
if (counts)
++counts->inter_mode[ctx][mode];
return NEARESTMV + mode;
}
static int read_segment_id(vpx_reader *r, const struct segmentation *seg) {
return vpx_read_tree(r, vp9_segment_tree, seg->tree_probs);
}
static TX_SIZE read_selected_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd,
TX_SIZE max_tx_size, vpx_reader *r) {
FRAME_COUNTS *counts = xd->counts;
const int ctx = get_tx_size_context(xd);
const vpx_prob *tx_probs = get_tx_probs(max_tx_size, ctx, &cm->fc->tx_probs);
int tx_size = vpx_read(r, tx_probs[0]);
if (tx_size != TX_4X4 && max_tx_size >= TX_16X16) {
tx_size += vpx_read(r, tx_probs[1]);
if (tx_size != TX_8X8 && max_tx_size >= TX_32X32)
tx_size += vpx_read(r, tx_probs[2]);
}
if (counts)
++get_tx_counts(max_tx_size, ctx, &counts->tx)[tx_size];
return (TX_SIZE)tx_size;
}
static TX_SIZE read_tx_size(VP9_COMMON *cm, MACROBLOCKD *xd,
int allow_select, vpx_reader *r) {
TX_MODE tx_mode = cm->tx_mode;
BLOCK_SIZE bsize = xd->mi[0]->mbmi.sb_type;
const TX_SIZE max_tx_size = max_txsize_lookup[bsize];
if (allow_select && tx_mode == TX_MODE_SELECT && bsize >= BLOCK_8X8)
return read_selected_tx_size(cm, xd, max_tx_size, r);
else
return MIN(max_tx_size, tx_mode_to_biggest_tx_size[tx_mode]);
}
static int dec_get_segment_id(const VP9_COMMON *cm, const uint8_t *segment_ids,
int mi_offset, int x_mis, int y_mis) {
int x, y, segment_id = INT_MAX;
for (y = 0; y < y_mis; y++)
for (x = 0; x < x_mis; x++)
segment_id = MIN(segment_id,
segment_ids[mi_offset + y * cm->mi_cols + x]);
assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);
return segment_id;
}
static void set_segment_id(VP9_COMMON *cm, int mi_offset,
int x_mis, int y_mis, int segment_id) {
int x, y;
assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);
for (y = 0; y < y_mis; y++)
for (x = 0; x < x_mis; x++)
cm->current_frame_seg_map[mi_offset + y * cm->mi_cols + x] = segment_id;
}
static void copy_segment_id(const VP9_COMMON *cm,
const uint8_t *last_segment_ids,
uint8_t *current_segment_ids,
int mi_offset, int x_mis, int y_mis) {
int x, y;
for (y = 0; y < y_mis; y++)
for (x = 0; x < x_mis; x++)
current_segment_ids[mi_offset + y * cm->mi_cols + x] = last_segment_ids ?
last_segment_ids[mi_offset + y * cm->mi_cols + x] : 0;
}
static int read_intra_segment_id(VP9_COMMON *const cm, int mi_offset,
int x_mis, int y_mis,
vpx_reader *r) {
struct segmentation *const seg = &cm->seg;
int segment_id;
if (!seg->enabled)
return 0; // Default for disabled segmentation
if (!seg->update_map) {
copy_segment_id(cm, cm->last_frame_seg_map, cm->current_frame_seg_map,
mi_offset, x_mis, y_mis);
return 0;
}
segment_id = read_segment_id(r, seg);
set_segment_id(cm, mi_offset, x_mis, y_mis, segment_id);
return segment_id;
}
static int read_inter_segment_id(VP9_COMMON *const cm, MACROBLOCKD *const xd,
int mi_row, int mi_col, vpx_reader *r) {
struct segmentation *const seg = &cm->seg;
MB_MODE_INFO *const mbmi = &xd->mi[0]->mbmi;
int predicted_segment_id, segment_id;
const int mi_offset = mi_row * cm->mi_cols + mi_col;
const int bw = xd->plane[0].n4_w >> 1;
const int bh = xd->plane[0].n4_h >> 1;
// TODO(slavarnway): move x_mis, y_mis into xd ?????
const int x_mis = MIN(cm->mi_cols - mi_col, bw);
const int y_mis = MIN(cm->mi_rows - mi_row, bh);
if (!seg->enabled)
return 0; // Default for disabled segmentation
predicted_segment_id = cm->last_frame_seg_map ?
dec_get_segment_id(cm, cm->last_frame_seg_map, mi_offset, x_mis, y_mis) :
0;
if (!seg->update_map) {
copy_segment_id(cm, cm->last_frame_seg_map, cm->current_frame_seg_map,
mi_offset, x_mis, y_mis);
return predicted_segment_id;
}
if (seg->temporal_update) {
const vpx_prob pred_prob = vp9_get_pred_prob_seg_id(seg, xd);
mbmi->seg_id_predicted = vpx_read(r, pred_prob);
segment_id = mbmi->seg_id_predicted ? predicted_segment_id
: read_segment_id(r, seg);
} else {
segment_id = read_segment_id(r, seg);
}
set_segment_id(cm, mi_offset, x_mis, y_mis, segment_id);
return segment_id;
}
static int read_skip(VP9_COMMON *cm, const MACROBLOCKD *xd,
int segment_id, vpx_reader *r) {
if (segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP)) {
return 1;
} else {
const int ctx = vp9_get_skip_context(xd);
const int skip = vpx_read(r, cm->fc->skip_probs[ctx]);
FRAME_COUNTS *counts = xd->counts;
if (counts)
++counts->skip[ctx][skip];
return skip;
}
}
static void read_intra_frame_mode_info(VP9_COMMON *const cm,
MACROBLOCKD *const xd,
int mi_row, int mi_col, vpx_reader *r) {
MODE_INFO *const mi = xd->mi[0];
MB_MODE_INFO *const mbmi = &mi->mbmi;
const MODE_INFO *above_mi = xd->above_mi;
const MODE_INFO *left_mi = xd->left_mi;
const BLOCK_SIZE bsize = mbmi->sb_type;
int i;
const int mi_offset = mi_row * cm->mi_cols + mi_col;
const int bw = xd->plane[0].n4_w >> 1;
const int bh = xd->plane[0].n4_h >> 1;
// TODO(slavarnway): move x_mis, y_mis into xd ?????
const int x_mis = MIN(cm->mi_cols - mi_col, bw);
const int y_mis = MIN(cm->mi_rows - mi_row, bh);
mbmi->segment_id = read_intra_segment_id(cm, mi_offset, x_mis, y_mis, r);
mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r);
mbmi->tx_size = read_tx_size(cm, xd, 1, r);
mbmi->ref_frame[0] = INTRA_FRAME;
mbmi->ref_frame[1] = NONE;
switch (bsize) {
case BLOCK_4X4:
for (i = 0; i < 4; ++i)
mi->bmi[i].as_mode =
read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, i));
mbmi->mode = mi->bmi[3].as_mode;
break;
case BLOCK_4X8:
mi->bmi[0].as_mode = mi->bmi[2].as_mode =
read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 0));
mi->bmi[1].as_mode = mi->bmi[3].as_mode = mbmi->mode =
read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 1));
break;
case BLOCK_8X4:
mi->bmi[0].as_mode = mi->bmi[1].as_mode =
read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 0));
mi->bmi[2].as_mode = mi->bmi[3].as_mode = mbmi->mode =
read_intra_mode(r, get_y_mode_probs(mi, above_mi, left_mi, 2));
break;
default:
mbmi->mode = read_intra_mode(r,
get_y_mode_probs(mi, above_mi, left_mi, 0));
}
mbmi->uv_mode = read_intra_mode(r, vp9_kf_uv_mode_prob[mbmi->mode]);
}
static int read_mv_component(vpx_reader *r,
const nmv_component *mvcomp, int usehp) {
int mag, d, fr, hp;
const int sign = vpx_read(r, mvcomp->sign);
const int mv_class = vpx_read_tree(r, vp9_mv_class_tree, mvcomp->classes);
const int class0 = mv_class == MV_CLASS_0;
// Integer part
if (class0) {
d = vpx_read_tree(r, vp9_mv_class0_tree, mvcomp->class0);
mag = 0;
} else {
int i;
const int n = mv_class + CLASS0_BITS - 1; // number of bits
d = 0;
for (i = 0; i < n; ++i)
d |= vpx_read(r, mvcomp->bits[i]) << i;
mag = CLASS0_SIZE << (mv_class + 2);
}
// Fractional part
fr = vpx_read_tree(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 ? vpx_read(r, class0 ? mvcomp->class0_hp : mvcomp->hp)
: 1;
// Result
mag += ((d << 3) | (fr << 1) | hp) + 1;
return sign ? -mag : mag;
}
static INLINE void read_mv(vpx_reader *r, MV *mv, const MV *ref,
const nmv_context *ctx,
nmv_context_counts *counts, int allow_hp) {
const MV_JOINT_TYPE joint_type =
(MV_JOINT_TYPE)vpx_read_tree(r, vp9_mv_joint_tree, ctx->joints);
const int use_hp = allow_hp && vp9_use_mv_hp(ref);
MV diff = {0, 0};
if (mv_joint_vertical(joint_type))
diff.row = read_mv_component(r, &ctx->comps[0], use_hp);
if (mv_joint_horizontal(joint_type))
diff.col = read_mv_component(r, &ctx->comps[1], use_hp);
vp9_inc_mv(&diff, counts);
mv->row = ref->row + diff.row;
mv->col = ref->col + diff.col;
}
static REFERENCE_MODE read_block_reference_mode(VP9_COMMON *cm,
const MACROBLOCKD *xd,
vpx_reader *r) {
if (cm->reference_mode == REFERENCE_MODE_SELECT) {
const int ctx = vp9_get_reference_mode_context(cm, xd);
const REFERENCE_MODE mode =
(REFERENCE_MODE)vpx_read(r, cm->fc->comp_inter_prob[ctx]);
FRAME_COUNTS *counts = xd->counts;
if (counts)
++counts->comp_inter[ctx][mode];
return mode; // SINGLE_REFERENCE or COMPOUND_REFERENCE
} else {
return cm->reference_mode;
}
}
// Read the referncence frame
static void read_ref_frames(VP9_COMMON *const cm, MACROBLOCKD *const xd,
vpx_reader *r,
int segment_id, MV_REFERENCE_FRAME ref_frame[2]) {
FRAME_CONTEXT *const fc = cm->fc;
FRAME_COUNTS *counts = xd->counts;
if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) {
ref_frame[0] = (MV_REFERENCE_FRAME)get_segdata(&cm->seg, segment_id,
SEG_LVL_REF_FRAME);
ref_frame[1] = NONE;
} else {
const REFERENCE_MODE mode = read_block_reference_mode(cm, xd, r);
// FIXME(rbultje) I'm pretty sure this breaks segmentation ref frame coding
if (mode == COMPOUND_REFERENCE) {
const int idx = cm->ref_frame_sign_bias[cm->comp_fixed_ref];
const int ctx = vp9_get_pred_context_comp_ref_p(cm, xd);
const int bit = vpx_read(r, fc->comp_ref_prob[ctx]);
if (counts)
++counts->comp_ref[ctx][bit];
ref_frame[idx] = cm->comp_fixed_ref;
ref_frame[!idx] = cm->comp_var_ref[bit];
} else if (mode == SINGLE_REFERENCE) {
const int ctx0 = vp9_get_pred_context_single_ref_p1(xd);
const int bit0 = vpx_read(r, fc->single_ref_prob[ctx0][0]);
if (counts)
++counts->single_ref[ctx0][0][bit0];
if (bit0) {
const int ctx1 = vp9_get_pred_context_single_ref_p2(xd);
const int bit1 = vpx_read(r, fc->single_ref_prob[ctx1][1]);
if (counts)
++counts->single_ref[ctx1][1][bit1];
ref_frame[0] = bit1 ? ALTREF_FRAME : GOLDEN_FRAME;
} else {
ref_frame[0] = LAST_FRAME;
}
ref_frame[1] = NONE;
} else {
assert(0 && "Invalid prediction mode.");
}
}
}
static INLINE INTERP_FILTER read_switchable_interp_filter(
VP9_COMMON *const cm, MACROBLOCKD *const xd,
vpx_reader *r) {
const int ctx = vp9_get_pred_context_switchable_interp(xd);
const INTERP_FILTER type =
(INTERP_FILTER)vpx_read_tree(r, vp9_switchable_interp_tree,
cm->fc->switchable_interp_prob[ctx]);
FRAME_COUNTS *counts = xd->counts;
if (counts)
++counts->switchable_interp[ctx][type];
return type;
}
static void read_intra_block_mode_info(VP9_COMMON *const cm,
MACROBLOCKD *const xd, MODE_INFO *mi,
vpx_reader *r) {
MB_MODE_INFO *const mbmi = &mi->mbmi;
const BLOCK_SIZE bsize = mi->mbmi.sb_type;
int i;
mbmi->ref_frame[0] = INTRA_FRAME;
mbmi->ref_frame[1] = NONE;
switch (bsize) {
case BLOCK_4X4:
for (i = 0; i < 4; ++i)
mi->bmi[i].as_mode = read_intra_mode_y(cm, xd, r, 0);
mbmi->mode = mi->bmi[3].as_mode;
break;
case BLOCK_4X8:
mi->bmi[0].as_mode = mi->bmi[2].as_mode = read_intra_mode_y(cm, xd,
r, 0);
mi->bmi[1].as_mode = mi->bmi[3].as_mode = mbmi->mode =
read_intra_mode_y(cm, xd, r, 0);
break;
case BLOCK_8X4:
mi->bmi[0].as_mode = mi->bmi[1].as_mode = read_intra_mode_y(cm, xd,
r, 0);
mi->bmi[2].as_mode = mi->bmi[3].as_mode = mbmi->mode =
read_intra_mode_y(cm, xd, r, 0);
break;
default:
mbmi->mode = read_intra_mode_y(cm, xd, r, size_group_lookup[bsize]);
}
mbmi->uv_mode = read_intra_mode_uv(cm, xd, r, mbmi->mode);
}
static INLINE int is_mv_valid(const MV *mv) {
return mv->row > MV_LOW && mv->row < MV_UPP &&
mv->col > MV_LOW && mv->col < MV_UPP;
}
static INLINE int assign_mv(VP9_COMMON *cm, MACROBLOCKD *xd,
PREDICTION_MODE mode,
int_mv mv[2], int_mv ref_mv[2],
int_mv nearest_mv[2], int_mv near_mv[2],
int is_compound, int allow_hp, vpx_reader *r) {
int i;
int ret = 1;
switch (mode) {
case NEWMV: {
FRAME_COUNTS *counts = xd->counts;
nmv_context_counts *const mv_counts = counts ? &counts->mv : NULL;
for (i = 0; i < 1 + is_compound; ++i) {
read_mv(r, &mv[i].as_mv, &ref_mv[i].as_mv, &cm->fc->nmvc, mv_counts,
allow_hp);
ret = ret && is_mv_valid(&mv[i].as_mv);
}
break;
}
case NEARESTMV: {
mv[0].as_int = nearest_mv[0].as_int;
if (is_compound)
mv[1].as_int = nearest_mv[1].as_int;
break;
}
case NEARMV: {
mv[0].as_int = near_mv[0].as_int;
if (is_compound)
mv[1].as_int = near_mv[1].as_int;
break;
}
case ZEROMV: {
mv[0].as_int = 0;
if (is_compound)
mv[1].as_int = 0;
break;
}
default: {
return 0;
}
}
return ret;
}
static int read_is_inter_block(VP9_COMMON *const cm, MACROBLOCKD *const xd,
int segment_id, vpx_reader *r) {
if (segfeature_active(&cm->seg, segment_id, SEG_LVL_REF_FRAME)) {
return get_segdata(&cm->seg, segment_id, SEG_LVL_REF_FRAME) != INTRA_FRAME;
} else {
const int ctx = vp9_get_intra_inter_context(xd);
const int is_inter = vpx_read(r, cm->fc->intra_inter_prob[ctx]);
FRAME_COUNTS *counts = xd->counts;
if (counts)
++counts->intra_inter[ctx][is_inter];
return is_inter;
}
}
static void fpm_sync(void *const data, int mi_row) {
VP9Decoder *const pbi = (VP9Decoder *)data;
vp9_frameworker_wait(pbi->frame_worker_owner, pbi->common.prev_frame,
mi_row << MI_BLOCK_SIZE_LOG2);
}
static void read_inter_block_mode_info(VP9Decoder *const pbi,
MACROBLOCKD *const xd,
MODE_INFO *const mi,
int mi_row, int mi_col, vpx_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MB_MODE_INFO *const mbmi = &mi->mbmi;
const BLOCK_SIZE bsize = mbmi->sb_type;
const int allow_hp = cm->allow_high_precision_mv;
int_mv nearestmv[2], nearmv[2];
int_mv ref_mvs[MAX_REF_FRAMES][MAX_MV_REF_CANDIDATES];
int ref, is_compound;
uint8_t inter_mode_ctx[MAX_REF_FRAMES];
read_ref_frames(cm, xd, r, mbmi->segment_id, mbmi->ref_frame);
is_compound = has_second_ref(mbmi);
for (ref = 0; ref < 1 + is_compound; ++ref) {
const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];
RefBuffer *ref_buf = &cm->frame_refs[frame - LAST_FRAME];
xd->block_refs[ref] = ref_buf;
if ((!vp9_is_valid_scale(&ref_buf->sf)))
vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM,
"Reference frame has invalid dimensions");
vp9_setup_pre_planes(xd, ref, ref_buf->buf, mi_row, mi_col,
&ref_buf->sf);
vp9_find_mv_refs(cm, xd, mi, frame, ref_mvs[frame],
mi_row, mi_col, fpm_sync, (void *)pbi, inter_mode_ctx);
}
if (segfeature_active(&cm->seg, mbmi->segment_id, SEG_LVL_SKIP)) {
mbmi->mode = ZEROMV;
if (bsize < BLOCK_8X8) {
vpx_internal_error(xd->error_info, VPX_CODEC_UNSUP_BITSTREAM,
"Invalid usage of segement feature on small blocks");
return;
}
} else {
if (bsize >= BLOCK_8X8)
mbmi->mode = read_inter_mode(cm, xd, r,
inter_mode_ctx[mbmi->ref_frame[0]]);
}
if (bsize < BLOCK_8X8 || mbmi->mode != ZEROMV) {
for (ref = 0; ref < 1 + is_compound; ++ref) {
vp9_find_best_ref_mvs(xd, allow_hp, ref_mvs[mbmi->ref_frame[ref]],
&nearestmv[ref], &nearmv[ref]);
}
}
mbmi->interp_filter = (cm->interp_filter == SWITCHABLE)
? read_switchable_interp_filter(cm, xd, r)
: cm->interp_filter;
if (bsize < BLOCK_8X8) {
const int num_4x4_w = 1 << xd->bmode_blocks_wl;
const int num_4x4_h = 1 << xd->bmode_blocks_hl;
int idx, idy;
PREDICTION_MODE b_mode;
int_mv nearest_sub8x8[2], near_sub8x8[2];
for (idy = 0; idy < 2; idy += num_4x4_h) {
for (idx = 0; idx < 2; idx += num_4x4_w) {
int_mv block[2];
const int j = idy * 2 + idx;
b_mode = read_inter_mode(cm, xd, r, inter_mode_ctx[mbmi->ref_frame[0]]);
if (b_mode == NEARESTMV || b_mode == NEARMV) {
uint8_t dummy_mode_ctx[MAX_REF_FRAMES];
for (ref = 0; ref < 1 + is_compound; ++ref)
vp9_append_sub8x8_mvs_for_idx(cm, xd, j, ref, mi_row, mi_col,
&nearest_sub8x8[ref],
&near_sub8x8[ref],
dummy_mode_ctx);
}
if (!assign_mv(cm, xd, b_mode, block, nearestmv,
nearest_sub8x8, near_sub8x8,
is_compound, allow_hp, r)) {
xd->corrupted |= 1;
break;
}
mi->bmi[j].as_mv[0].as_int = block[0].as_int;
if (is_compound)
mi->bmi[j].as_mv[1].as_int = block[1].as_int;
if (num_4x4_h == 2)
mi->bmi[j + 2] = mi->bmi[j];
if (num_4x4_w == 2)
mi->bmi[j + 1] = mi->bmi[j];
}
}
mi->mbmi.mode = b_mode;
mbmi->mv[0].as_int = mi->bmi[3].as_mv[0].as_int;
mbmi->mv[1].as_int = mi->bmi[3].as_mv[1].as_int;
} else {
xd->corrupted |= !assign_mv(cm, xd, mbmi->mode, mbmi->mv, nearestmv,
nearestmv, nearmv, is_compound, allow_hp, r);
}
}
static void read_inter_frame_mode_info(VP9Decoder *const pbi,
MACROBLOCKD *const xd,
int mi_row, int mi_col, vpx_reader *r) {
VP9_COMMON *const cm = &pbi->common;
MODE_INFO *const mi = xd->mi[0];
MB_MODE_INFO *const mbmi = &mi->mbmi;
int inter_block;
mbmi->mv[0].as_int = 0;
mbmi->mv[1].as_int = 0;
mbmi->segment_id = read_inter_segment_id(cm, xd, mi_row, mi_col, r);
mbmi->skip = read_skip(cm, xd, mbmi->segment_id, r);
inter_block = read_is_inter_block(cm, xd, mbmi->segment_id, r);
mbmi->tx_size = read_tx_size(cm, xd, !mbmi->skip || !inter_block, r);
if (inter_block)
read_inter_block_mode_info(pbi, xd, mi, mi_row, mi_col, r);
else
read_intra_block_mode_info(cm, xd, mi, r);
}
void vpx_read_mode_info(VP9Decoder *const pbi, MACROBLOCKD *xd,
int mi_row, int mi_col, vpx_reader *r,
int x_mis, int y_mis) {
VP9_COMMON *const cm = &pbi->common;
MODE_INFO *const mi = xd->mi[0];
MV_REF* frame_mvs = cm->cur_frame->mvs + mi_row * cm->mi_cols + mi_col;
int w, h;
if (frame_is_intra_only(cm)) {
read_intra_frame_mode_info(cm, xd, mi_row, mi_col, r);
} else {
read_inter_frame_mode_info(pbi, xd, mi_row, mi_col, r);
for (h = 0; h < y_mis; ++h) {
MV_REF *const frame_mv = frame_mvs + h * cm->mi_cols;
for (w = 0; w < x_mis; ++w) {
MV_REF *const mv = frame_mv + w;
mv->ref_frame[0] = mi->mbmi.ref_frame[0];
mv->ref_frame[1] = mi->mbmi.ref_frame[1];
mv->mv[0].as_int = mi->mbmi.mv[0].as_int;
mv->mv[1].as_int = mi->mbmi.mv[1].as_int;
}
}
}
}