1137 lines
37 KiB
C
1137 lines
37 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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#include "treereader.h"
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#include "vp8/common/entropymv.h"
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#include "vp8/common/entropymode.h"
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#include "onyxd_int.h"
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#include "vp8/common/findnearmv.h"
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#include "vp8/common/seg_common.h"
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#include "vp8/common/pred_common.h"
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#include "vp8/common/entropy.h"
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#if CONFIG_DEBUG
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#include <assert.h>
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#endif
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//#define DEBUG_DEC_MV
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#ifdef DEBUG_DEC_MV
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int dec_mvcount = 0;
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#endif
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static int vp8_read_bmode(vp8_reader *bc, const vp8_prob *p)
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{
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const int i = vp8_treed_read(bc, vp8_bmode_tree, p);
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return i;
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}
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static int vp8_read_ymode(vp8_reader *bc, const vp8_prob *p)
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{
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const int i = vp8_treed_read(bc, vp8_ymode_tree, p);
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return i;
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}
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static int vp8_kfread_ymode(vp8_reader *bc, const vp8_prob *p)
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{
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const int i = vp8_treed_read(bc, vp8_kf_ymode_tree, p);
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return i;
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}
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static int vp8_read_i8x8_mode(vp8_reader *bc, const vp8_prob *p)
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{
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const int i = vp8_treed_read(bc, vp8_i8x8_mode_tree, p);
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return i;
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}
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static int vp8_read_uv_mode(vp8_reader *bc, const vp8_prob *p)
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{
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const int i = vp8_treed_read(bc, vp8_uv_mode_tree, p);
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return i;
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}
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// This function reads the current macro block's segnent id from the bitstream
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// It should only be called if a segment map update is indicated.
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static void vp8_read_mb_segid(vp8_reader *r, MB_MODE_INFO *mi, MACROBLOCKD *x)
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{
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/* Is segmentation enabled */
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if (x->segmentation_enabled && x->update_mb_segmentation_map)
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{
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/* If so then read the segment id. */
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if (vp8_read(r, x->mb_segment_tree_probs[0]))
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mi->segment_id = (unsigned char)(2 + vp8_read(r, x->mb_segment_tree_probs[2]));
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else
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mi->segment_id = (unsigned char)(vp8_read(r, x->mb_segment_tree_probs[1]));
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}
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}
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extern const int vp8_i8x8_block[4];
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static void vp8_kfread_modes(VP8D_COMP *pbi,
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MODE_INFO *m,
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int mb_row,
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int mb_col)
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{
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VP8_COMMON *const cm = & pbi->common;
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vp8_reader *const bc = & pbi->bc;
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const int mis = pbi->common.mode_info_stride;
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int map_index = mb_row * pbi->common.mb_cols + mb_col;
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MB_PREDICTION_MODE y_mode;
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// Read the Macroblock segmentation map if it is being updated explicitly
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// this frame (reset to 0 by default).
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m->mbmi.segment_id = 0;
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if (pbi->mb.update_mb_segmentation_map)
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{
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vp8_read_mb_segid(bc, &m->mbmi, &pbi->mb);
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pbi->common.last_frame_seg_map[map_index] = m->mbmi.segment_id;
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}
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m->mbmi.mb_skip_coeff = 0;
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if ( pbi->common.mb_no_coeff_skip &&
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( !segfeature_active( &pbi->mb,
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m->mbmi.segment_id, SEG_LVL_EOB ) ||
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( get_segdata( &pbi->mb,
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m->mbmi.segment_id, SEG_LVL_EOB ) != 0 ) ) )
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{
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#if CONFIG_NEWENTROPY
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MACROBLOCKD *const xd = & pbi->mb;
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m->mbmi.mb_skip_coeff = vp8_read(bc, get_pred_prob(cm, xd, PRED_MBSKIP));
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#else
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m->mbmi.mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
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#endif
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}
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else
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{
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if ( segfeature_active( &pbi->mb,
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m->mbmi.segment_id, SEG_LVL_EOB ) &&
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( get_segdata( &pbi->mb,
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m->mbmi.segment_id, SEG_LVL_EOB ) == 0 ) )
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{
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m->mbmi.mb_skip_coeff = 1;
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}
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else
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m->mbmi.mb_skip_coeff = 0;
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}
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#if CONFIG_QIMODE
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y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc,
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pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]);
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#else
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y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(
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bc, pbi->common.kf_ymode_prob);
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#endif
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#if CONFIG_COMP_INTRA_PRED
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m->mbmi.second_mode = (MB_PREDICTION_MODE) (DC_PRED - 1);
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#endif
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m->mbmi.ref_frame = INTRA_FRAME;
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if ((m->mbmi.mode = y_mode) == B_PRED)
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{
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int i = 0;
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#if CONFIG_COMP_INTRA_PRED
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int use_comp_pred = vp8_read(bc, 128);
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#endif
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do
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{
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const B_PREDICTION_MODE A = above_block_mode(m, i, mis);
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const B_PREDICTION_MODE L = left_block_mode(m, i);
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m->bmi[i].as_mode.first =
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(B_PREDICTION_MODE) vp8_read_bmode(
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bc, pbi->common.kf_bmode_prob [A] [L]);
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#if CONFIG_COMP_INTRA_PRED
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if (use_comp_pred)
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{
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m->bmi[i].as_mode.second =
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(B_PREDICTION_MODE) vp8_read_bmode(
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bc, pbi->common.kf_bmode_prob [A] [L]);
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}
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else
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{
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m->bmi[i].as_mode.second = (B_PREDICTION_MODE) (B_DC_PRED - 1);
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}
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#endif
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}
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while (++i < 16);
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}
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if((m->mbmi.mode = y_mode) == I8X8_PRED)
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{
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int i;
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int mode8x8;
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for(i=0;i<4;i++)
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{
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int ib = vp8_i8x8_block[i];
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mode8x8 = vp8_read_i8x8_mode(bc, pbi->common.i8x8_mode_prob);
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m->bmi[ib+0].as_mode.first= mode8x8;
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m->bmi[ib+1].as_mode.first= mode8x8;
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m->bmi[ib+4].as_mode.first= mode8x8;
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m->bmi[ib+5].as_mode.first= mode8x8;
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#if CONFIG_COMP_INTRA_PRED
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m->bmi[ib+0].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
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m->bmi[ib+1].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
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m->bmi[ib+4].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
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m->bmi[ib+5].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
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#endif
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}
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}
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else
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#if CONFIG_UVINTRA
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m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
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pbi->common.kf_uv_mode_prob[m->mbmi.mode]);
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#else
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m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
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pbi->common.kf_uv_mode_prob);
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#endif
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#if CONFIG_COMP_INTRA_PRED
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m->mbmi.second_uv_mode = (MB_PREDICTION_MODE) (DC_PRED - 1);
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#endif
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}
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static int read_mvcomponent(vp8_reader *r, const MV_CONTEXT *mvc)
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{
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const vp8_prob *const p = (const vp8_prob *) mvc;
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int x = 0;
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if (vp8_read(r, p [mvpis_short])) /* Large */
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{
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int i = 0;
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do
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{
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x += vp8_read(r, p [MVPbits + i]) << i;
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}
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while (++i < mvnum_short_bits);
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i = mvlong_width - 1; /* Skip bit 3, which is sometimes implicit */
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do
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{
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x += vp8_read(r, p [MVPbits + i]) << i;
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}
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while (--i > mvnum_short_bits);
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if (!(x & ~((2<<mvnum_short_bits)-1)) || vp8_read(r, p [MVPbits + mvnum_short_bits]))
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x += (mvnum_short);
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}
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else /* small */
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x = vp8_treed_read(r, vp8_small_mvtree, p + MVPshort);
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if (x && vp8_read(r, p [MVPsign]))
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x = -x;
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return x;
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}
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static void read_mv(vp8_reader *r, MV *mv, const MV_CONTEXT *mvc)
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{
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mv->row = (short)(read_mvcomponent(r, mvc) << 1);
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mv->col = (short)(read_mvcomponent(r, ++mvc) << 1);
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#ifdef DEBUG_DEC_MV
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int i;
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printf("%d (np): %d %d\n", dec_mvcount++, mv->row, mv->col);
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//for (i=0; i<MVPcount;++i) printf(" %d", (&mvc[-1])->prob[i]); printf("\n");
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//for (i=0; i<MVPcount;++i) printf(" %d", (&mvc[0])->prob[i]); printf("\n");
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#endif
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}
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static void read_mvcontexts(vp8_reader *bc, MV_CONTEXT *mvc)
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{
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int i = 0;
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do
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{
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const vp8_prob *up = vp8_mv_update_probs[i].prob;
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vp8_prob *p = (vp8_prob *)(mvc + i);
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vp8_prob *const pstop = p + MVPcount;
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do
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{
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if (vp8_read(bc, *up++))
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{
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const vp8_prob x = (vp8_prob)vp8_read_literal(bc, 7);
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*p = x ? x << 1 : 1;
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}
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}
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while (++p < pstop);
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}
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while (++i < 2);
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}
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#if CONFIG_HIGH_PRECISION_MV
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static int read_mvcomponent_hp(vp8_reader *r, const MV_CONTEXT_HP *mvc)
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{
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const vp8_prob *const p = (const vp8_prob *) mvc;
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int x = 0;
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if (vp8_read(r, p [mvpis_short_hp])) /* Large */
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{
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int i = 0;
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do
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{
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x += vp8_read(r, p [MVPbits_hp + i]) << i;
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}
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while (++i < mvnum_short_bits_hp);
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i = mvlong_width_hp - 1; /* Skip bit 3, which is sometimes implicit */
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do
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{
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x += vp8_read(r, p [MVPbits_hp + i]) << i;
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}
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while (--i > mvnum_short_bits_hp);
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if (!(x & ~((2<<mvnum_short_bits_hp)-1)) || vp8_read(r, p [MVPbits_hp + mvnum_short_bits_hp]))
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x += (mvnum_short_hp);
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}
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else /* small */
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x = vp8_treed_read(r, vp8_small_mvtree_hp, p + MVPshort_hp);
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if (x && vp8_read(r, p [MVPsign_hp]))
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x = -x;
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return x;
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}
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static void read_mv_hp(vp8_reader *r, MV *mv, const MV_CONTEXT_HP *mvc)
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{
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mv->row = (short)(read_mvcomponent_hp(r, mvc));
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mv->col = (short)(read_mvcomponent_hp(r, ++mvc));
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#ifdef DEBUG_DEC_MV
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int i;
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printf("%d (hp): %d %d\n", dec_mvcount++, mv->row, mv->col);
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//for (i=0; i<MVPcount_hp;++i) printf(" %d", (&mvc[-1])->prob[i]); printf("\n");
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//for (i=0; i<MVPcount_hp;++i) printf(" %d", (&mvc[0])->prob[i]); printf("\n");
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#endif
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}
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static void read_mvcontexts_hp(vp8_reader *bc, MV_CONTEXT_HP *mvc)
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{
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int i = 0;
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do
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{
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const vp8_prob *up = vp8_mv_update_probs_hp[i].prob;
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vp8_prob *p = (vp8_prob *)(mvc + i);
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vp8_prob *const pstop = p + MVPcount_hp;
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do
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{
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if (vp8_read(bc, *up++))
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{
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const vp8_prob x = (vp8_prob)vp8_read_literal(bc, 7);
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*p = x ? x << 1 : 1;
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}
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}
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while (++p < pstop);
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}
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while (++i < 2);
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}
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#endif /* CONFIG_HIGH_PRECISION_MV */
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// Read the referncence frame
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static MV_REFERENCE_FRAME read_ref_frame( VP8D_COMP *pbi,
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vp8_reader *const bc,
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unsigned char segment_id )
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{
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MV_REFERENCE_FRAME ref_frame;
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int seg_ref_active;
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int seg_ref_count = 0;
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VP8_COMMON *const cm = & pbi->common;
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MACROBLOCKD *const xd = &pbi->mb;
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seg_ref_active = segfeature_active( xd,
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segment_id,
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SEG_LVL_REF_FRAME );
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// If segment coding enabled does the segment allow for more than one
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// possible reference frame
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if ( seg_ref_active )
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{
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seg_ref_count = check_segref( xd, segment_id, INTRA_FRAME ) +
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check_segref( xd, segment_id, LAST_FRAME ) +
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check_segref( xd, segment_id, GOLDEN_FRAME ) +
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check_segref( xd, segment_id, ALTREF_FRAME );
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}
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// Segment reference frame features not available or allows for
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// multiple reference frame options
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if ( !seg_ref_active || (seg_ref_count > 1) )
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{
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// Values used in prediction model coding
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unsigned char prediction_flag;
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vp8_prob pred_prob;
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MV_REFERENCE_FRAME pred_ref;
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// Get the context probability the prediction flag
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pred_prob = get_pred_prob( cm, xd, PRED_REF );
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// Read the prediction status flag
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prediction_flag = (unsigned char)vp8_read( bc, pred_prob );
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// Store the prediction flag.
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set_pred_flag( xd, PRED_REF, prediction_flag );
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// Get the predicted reference frame.
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pred_ref = get_pred_ref( cm, xd );
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// If correctly predicted then use the predicted value
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if ( prediction_flag )
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{
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ref_frame = pred_ref;
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}
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// else decode the explicitly coded value
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else
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{
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vp8_prob mod_refprobs[PREDICTION_PROBS];
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vpx_memcpy( mod_refprobs,
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cm->mod_refprobs[pred_ref], sizeof(mod_refprobs) );
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// If segment coding enabled blank out options that cant occur by
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// setting the branch probability to 0.
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if ( seg_ref_active )
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{
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mod_refprobs[INTRA_FRAME] *=
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check_segref( xd, segment_id, INTRA_FRAME );
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mod_refprobs[LAST_FRAME] *=
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check_segref( xd, segment_id, LAST_FRAME );
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mod_refprobs[GOLDEN_FRAME] *=
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( check_segref( xd, segment_id, GOLDEN_FRAME ) *
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check_segref( xd, segment_id, ALTREF_FRAME ) );
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}
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// Default to INTRA_FRAME (value 0)
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ref_frame = INTRA_FRAME;
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// Do we need to decode the Intra/Inter branch
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if ( mod_refprobs[0] )
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ref_frame = (MV_REFERENCE_FRAME) vp8_read(bc, mod_refprobs[0]);
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else
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ref_frame ++;
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if (ref_frame)
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{
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// Do we need to decode the Last/Gf_Arf branch
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if ( mod_refprobs[1] )
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ref_frame += vp8_read(bc, mod_refprobs[1]);
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else
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ref_frame++;
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if ( ref_frame > 1 )
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{
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// Do we need to decode the GF/Arf branch
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if ( mod_refprobs[2] )
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ref_frame += vp8_read(bc, mod_refprobs[2]);
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else
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{
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if ( seg_ref_active )
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{
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if ( (pred_ref == GOLDEN_FRAME) ||
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!check_segref( xd, segment_id, GOLDEN_FRAME) )
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{
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ref_frame = ALTREF_FRAME;
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}
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else
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ref_frame = GOLDEN_FRAME;
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}
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else
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ref_frame = (pred_ref == GOLDEN_FRAME)
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? ALTREF_FRAME : GOLDEN_FRAME;
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}
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}
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}
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}
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}
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// Segment reference frame features are enabled
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else
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{
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// The reference frame for the mb is considered as correclty predicted
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// if it is signaled at the segment level for the purposes of the
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// common prediction model
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set_pred_flag( xd, PRED_REF, 1 );
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ref_frame = get_pred_ref( cm, xd );
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}
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return (MV_REFERENCE_FRAME)ref_frame;
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}
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|
|
static MB_PREDICTION_MODE read_mv_ref(vp8_reader *bc, const vp8_prob *p)
|
|
{
|
|
const int i = vp8_treed_read(bc, vp8_mv_ref_tree, p);
|
|
|
|
return (MB_PREDICTION_MODE)i;
|
|
}
|
|
|
|
static B_PREDICTION_MODE sub_mv_ref(vp8_reader *bc, const vp8_prob *p)
|
|
{
|
|
const int i = vp8_treed_read(bc, vp8_sub_mv_ref_tree, p);
|
|
|
|
return (B_PREDICTION_MODE)i;
|
|
}
|
|
|
|
#ifdef VPX_MODE_COUNT
|
|
unsigned int vp8_mv_cont_count[5][4] =
|
|
{
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 },
|
|
{ 0, 0, 0, 0 }
|
|
};
|
|
#endif
|
|
|
|
static const unsigned char mbsplit_fill_count[4] = {8, 8, 4, 1};
|
|
static const unsigned char mbsplit_fill_offset[4][16] = {
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
|
|
{ 0, 1, 4, 5, 8, 9, 12, 13, 2, 3, 6, 7, 10, 11, 14, 15},
|
|
{ 0, 1, 4, 5, 2, 3, 6, 7, 8, 9, 12, 13, 10, 11, 14, 15},
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
|
|
};
|
|
|
|
|
|
|
|
static void mb_mode_mv_init(VP8D_COMP *pbi)
|
|
{
|
|
VP8_COMMON *const cm = & pbi->common;
|
|
vp8_reader *const bc = & pbi->bc;
|
|
MV_CONTEXT *const mvc = pbi->common.fc.mvc;
|
|
#if CONFIG_HIGH_PRECISION_MV
|
|
MV_CONTEXT_HP *const mvc_hp = pbi->common.fc.mvc_hp;
|
|
MACROBLOCKD *const xd = & pbi->mb;
|
|
#endif
|
|
|
|
#if CONFIG_NEWENTROPY
|
|
vpx_memset(cm->mbskip_pred_probs, 0, sizeof(cm->mbskip_pred_probs));
|
|
#else
|
|
pbi->prob_skip_false = 0;
|
|
#endif
|
|
if (pbi->common.mb_no_coeff_skip)
|
|
{
|
|
#if CONFIG_NEWENTROPY
|
|
int k;
|
|
for (k=0; k<MBSKIP_CONTEXTS; ++k)
|
|
cm->mbskip_pred_probs[k] = (vp8_prob)vp8_read_literal(bc, 8);
|
|
#else
|
|
pbi->prob_skip_false = (vp8_prob)vp8_read_literal(bc, 8);
|
|
#endif
|
|
}
|
|
|
|
if(pbi->common.frame_type != KEY_FRAME)
|
|
{
|
|
// Decode the baseline probabilities for decoding reference frame
|
|
cm->prob_intra_coded = (vp8_prob)vp8_read_literal(bc, 8);
|
|
cm->prob_last_coded = (vp8_prob)vp8_read_literal(bc, 8);
|
|
cm->prob_gf_coded = (vp8_prob)vp8_read_literal(bc, 8);
|
|
|
|
// Computes a modified set of probabilities for use when reference
|
|
// frame prediction fails.
|
|
compute_mod_refprobs( cm );
|
|
|
|
pbi->common.comp_pred_mode = vp8_read(bc, 128);
|
|
if (cm->comp_pred_mode)
|
|
cm->comp_pred_mode += vp8_read(bc, 128);
|
|
if (cm->comp_pred_mode == HYBRID_PREDICTION)
|
|
{
|
|
int i;
|
|
for ( i = 0; i < COMP_PRED_CONTEXTS; i++ )
|
|
cm->prob_comppred[i] = (vp8_prob)vp8_read_literal(bc, 8);
|
|
}
|
|
|
|
if (vp8_read_bit(bc))
|
|
{
|
|
int i = 0;
|
|
|
|
do
|
|
{
|
|
cm->fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
|
|
}
|
|
while (++i < VP8_YMODES-1);
|
|
}
|
|
#if CONFIG_UVINTRA
|
|
//vp8_read_bit(bc);
|
|
#else
|
|
if (vp8_read_bit(bc))
|
|
{
|
|
int i = 0;
|
|
|
|
do
|
|
{
|
|
cm->fc.uv_mode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
|
|
}
|
|
while (++i < VP8_UV_MODES-1);
|
|
}
|
|
#endif /* CONFIG_UVINTRA */
|
|
#if CONFIG_HIGH_PRECISION_MV
|
|
if (xd->allow_high_precision_mv)
|
|
read_mvcontexts_hp(bc, mvc_hp);
|
|
else
|
|
#endif
|
|
read_mvcontexts(bc, mvc);
|
|
}
|
|
}
|
|
|
|
// This function either reads the segment id for the current macroblock from
|
|
// the bitstream or if the value is temporally predicted asserts the predicted
|
|
// value
|
|
static void read_mb_segment_id ( VP8D_COMP *pbi,
|
|
int mb_row, int mb_col )
|
|
{
|
|
vp8_reader *const bc = & pbi->bc;
|
|
VP8_COMMON *const cm = & pbi->common;
|
|
MACROBLOCKD *const xd = & pbi->mb;
|
|
MODE_INFO *mi = xd->mode_info_context;
|
|
MB_MODE_INFO *mbmi = &mi->mbmi;
|
|
int index = mb_row * pbi->common.mb_cols + mb_col;
|
|
|
|
if (xd->segmentation_enabled)
|
|
{
|
|
if (xd->update_mb_segmentation_map)
|
|
{
|
|
// Is temporal coding of the segment id for this mb enabled.
|
|
if (cm->temporal_update)
|
|
{
|
|
// Get the context based probability for reading the
|
|
// prediction status flag
|
|
vp8_prob pred_prob =
|
|
get_pred_prob( cm, xd, PRED_SEG_ID );
|
|
|
|
// Read the prediction status flag
|
|
unsigned char seg_pred_flag =
|
|
(unsigned char)vp8_read(bc, pred_prob );
|
|
|
|
// Store the prediction flag.
|
|
set_pred_flag( xd, PRED_SEG_ID, seg_pred_flag );
|
|
|
|
// If the value is flagged as correctly predicted
|
|
// then use the predicted value
|
|
if ( seg_pred_flag )
|
|
{
|
|
mbmi->segment_id = get_pred_mb_segid( cm, index );
|
|
}
|
|
// Else .... decode it explicitly
|
|
else
|
|
{
|
|
vp8_read_mb_segid(bc, mbmi, xd );
|
|
cm->last_frame_seg_map[index] = mbmi->segment_id;
|
|
}
|
|
|
|
}
|
|
// Normal unpredicted coding mode
|
|
else
|
|
{
|
|
vp8_read_mb_segid(bc, mbmi, xd);
|
|
cm->last_frame_seg_map[index] = mbmi->segment_id;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// The encoder explicitly sets the segment_id to 0
|
|
// when segmentation is disabled
|
|
mbmi->segment_id = 0;
|
|
}
|
|
}
|
|
|
|
static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi,
|
|
MODE_INFO *prev_mi,
|
|
int mb_row, int mb_col)
|
|
{
|
|
VP8_COMMON *const cm = & pbi->common;
|
|
vp8_reader *const bc = & pbi->bc;
|
|
MV_CONTEXT *const mvc = pbi->common.fc.mvc;
|
|
#if CONFIG_HIGH_PRECISION_MV
|
|
MV_CONTEXT_HP *const mvc_hp = pbi->common.fc.mvc_hp;
|
|
#endif
|
|
const int mis = pbi->common.mode_info_stride;
|
|
MACROBLOCKD *const xd = & pbi->mb;
|
|
|
|
int_mv *const mv = & mbmi->mv;
|
|
int mb_to_left_edge;
|
|
int mb_to_right_edge;
|
|
int mb_to_top_edge;
|
|
int mb_to_bottom_edge;
|
|
|
|
mb_to_top_edge = xd->mb_to_top_edge;
|
|
mb_to_bottom_edge = xd->mb_to_bottom_edge;
|
|
mb_to_top_edge -= LEFT_TOP_MARGIN;
|
|
mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
|
|
mbmi->need_to_clamp_mvs = 0;
|
|
mbmi->need_to_clamp_secondmv = 0;
|
|
mbmi->second_ref_frame = 0;
|
|
/* Distance of Mb to the various image edges.
|
|
* These specified to 8th pel as they are always compared to MV values that are in 1/8th pel units
|
|
*/
|
|
xd->mb_to_left_edge =
|
|
mb_to_left_edge = -((mb_col * 16) << 3);
|
|
mb_to_left_edge -= LEFT_TOP_MARGIN;
|
|
|
|
xd->mb_to_right_edge =
|
|
mb_to_right_edge = ((pbi->common.mb_cols - 1 - mb_col) * 16) << 3;
|
|
mb_to_right_edge += RIGHT_BOTTOM_MARGIN;
|
|
|
|
// Make sure the MACROBLOCKD mode info pointer is pointed at the
|
|
// correct entry for the current macroblock.
|
|
xd->mode_info_context = mi;
|
|
|
|
// Read the macroblock segment id.
|
|
read_mb_segment_id ( pbi, mb_row, mb_col );
|
|
|
|
if ( pbi->common.mb_no_coeff_skip &&
|
|
( !segfeature_active( xd,
|
|
mbmi->segment_id, SEG_LVL_EOB ) ||
|
|
(get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) != 0) ) )
|
|
{
|
|
// Read the macroblock coeff skip flag if this feature is in use,
|
|
// else default to 0
|
|
#if CONFIG_NEWENTROPY
|
|
mbmi->mb_skip_coeff = vp8_read(bc, get_pred_prob(cm, xd, PRED_MBSKIP));
|
|
#else
|
|
mbmi->mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
if ( segfeature_active( xd,
|
|
mbmi->segment_id, SEG_LVL_EOB ) &&
|
|
(get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) == 0) )
|
|
{
|
|
mbmi->mb_skip_coeff = 1;
|
|
}
|
|
else
|
|
mbmi->mb_skip_coeff = 0;
|
|
}
|
|
|
|
// Read the reference frame
|
|
mbmi->ref_frame = read_ref_frame( pbi, bc, mbmi->segment_id );
|
|
|
|
// If reference frame is an Inter frame
|
|
if (mbmi->ref_frame)
|
|
{
|
|
int rct[4];
|
|
int_mv nearest, nearby, best_mv;
|
|
int_mv nearest_second, nearby_second, best_mv_second;
|
|
vp8_prob mv_ref_p [VP8_MVREFS-1];
|
|
|
|
vp8_find_near_mvs(xd, mi,
|
|
prev_mi,
|
|
&nearest, &nearby, &best_mv, rct,
|
|
mbmi->ref_frame, pbi->common.ref_frame_sign_bias);
|
|
vp8_mv_ref_probs(&pbi->common, mv_ref_p, rct);
|
|
|
|
// Is the segment level mode feature enabled for this segment
|
|
if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
|
|
{
|
|
mbmi->mode =
|
|
get_segdata( xd, mbmi->segment_id, SEG_LVL_MODE );
|
|
}
|
|
else
|
|
{
|
|
mbmi->mode = read_mv_ref(bc, mv_ref_p);
|
|
|
|
vp8_accum_mv_refs(&pbi->common, mbmi->mode, rct);
|
|
}
|
|
|
|
if ( cm->comp_pred_mode == COMP_PREDICTION_ONLY ||
|
|
(cm->comp_pred_mode == HYBRID_PREDICTION &&
|
|
vp8_read(bc, get_pred_prob( cm, xd, PRED_COMP ))) )
|
|
{
|
|
/* Since we have 3 reference frames, we can only have 3 unique
|
|
* combinations of combinations of 2 different reference frames
|
|
* (A-G, G-L or A-L). In the bitstream, we use this to simply
|
|
* derive the second reference frame from the first reference
|
|
* frame, by saying it's the next one in the enumerator, and
|
|
* if that's > n_refs, then the second reference frame is the
|
|
* first one in the enumerator. */
|
|
mbmi->second_ref_frame = mbmi->ref_frame + 1;
|
|
if (mbmi->second_ref_frame == 4)
|
|
mbmi->second_ref_frame = 1;
|
|
|
|
vp8_find_near_mvs(xd, mi,
|
|
prev_mi,
|
|
&nearest_second, &nearby_second, &best_mv_second, rct,
|
|
mbmi->second_ref_frame, pbi->common.ref_frame_sign_bias);
|
|
}
|
|
else
|
|
{
|
|
mbmi->second_ref_frame = 0;
|
|
}
|
|
|
|
mbmi->uv_mode = DC_PRED;
|
|
switch (mbmi->mode)
|
|
{
|
|
case SPLITMV:
|
|
{
|
|
const int s = mbmi->partitioning =
|
|
vp8_treed_read(bc, vp8_mbsplit_tree, vp8_mbsplit_probs);
|
|
const int num_p = vp8_mbsplit_count [s];
|
|
int j = 0;
|
|
|
|
mbmi->need_to_clamp_mvs = 0;
|
|
do /* for each subset j */
|
|
{
|
|
int_mv leftmv, abovemv, second_leftmv, second_abovemv;
|
|
int_mv blockmv, secondmv;
|
|
int k; /* first block in subset j */
|
|
int mv_contz;
|
|
int blockmode;
|
|
|
|
k = vp8_mbsplit_offset[s][j];
|
|
|
|
leftmv.as_int = left_block_mv(mi, k);
|
|
abovemv.as_int = above_block_mv(mi, k, mis);
|
|
if (mbmi->second_ref_frame)
|
|
{
|
|
second_leftmv.as_int = left_block_second_mv(mi, k);
|
|
second_abovemv.as_int = above_block_second_mv(mi, k, mis);
|
|
}
|
|
mv_contz = vp8_mv_cont(&leftmv, &abovemv);
|
|
blockmode = sub_mv_ref(bc, vp8_sub_mv_ref_prob2 [mv_contz]);
|
|
|
|
switch (blockmode)
|
|
{
|
|
case NEW4X4:
|
|
#if CONFIG_HIGH_PRECISION_MV
|
|
if (xd->allow_high_precision_mv)
|
|
read_mv_hp(bc, &blockmv.as_mv, (const MV_CONTEXT_HP *) mvc_hp);
|
|
else
|
|
#endif
|
|
read_mv(bc, &blockmv.as_mv, (const MV_CONTEXT *) mvc);
|
|
blockmv.as_mv.row += best_mv.as_mv.row;
|
|
blockmv.as_mv.col += best_mv.as_mv.col;
|
|
|
|
if (mbmi->second_ref_frame)
|
|
{
|
|
#if CONFIG_HIGH_PRECISION_MV
|
|
if (xd->allow_high_precision_mv)
|
|
read_mv_hp(bc, &secondmv.as_mv, (const MV_CONTEXT_HP *) mvc_hp);
|
|
else
|
|
#endif
|
|
read_mv(bc, &secondmv.as_mv, (const MV_CONTEXT *) mvc);
|
|
secondmv.as_mv.row += best_mv_second.as_mv.row;
|
|
secondmv.as_mv.col += best_mv_second.as_mv.col;
|
|
}
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][3]++;
|
|
#endif
|
|
break;
|
|
case LEFT4X4:
|
|
blockmv.as_int = leftmv.as_int;
|
|
if (mbmi->second_ref_frame)
|
|
secondmv.as_int = second_leftmv.as_int;
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][0]++;
|
|
#endif
|
|
break;
|
|
case ABOVE4X4:
|
|
blockmv.as_int = abovemv.as_int;
|
|
if (mbmi->second_ref_frame)
|
|
secondmv.as_int = second_abovemv.as_int;
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][1]++;
|
|
#endif
|
|
break;
|
|
case ZERO4X4:
|
|
blockmv.as_int = 0;
|
|
if (mbmi->second_ref_frame)
|
|
secondmv.as_int = 0;
|
|
#ifdef VPX_MODE_COUNT
|
|
vp8_mv_cont_count[mv_contz][2]++;
|
|
#endif
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
mbmi->need_to_clamp_mvs |= vp8_check_mv_bounds(&blockmv,
|
|
mb_to_left_edge,
|
|
mb_to_right_edge,
|
|
mb_to_top_edge,
|
|
mb_to_bottom_edge);
|
|
if (mbmi->second_ref_frame)
|
|
{
|
|
mbmi->need_to_clamp_mvs |= vp8_check_mv_bounds(&secondmv,
|
|
mb_to_left_edge,
|
|
mb_to_right_edge,
|
|
mb_to_top_edge,
|
|
mb_to_bottom_edge);
|
|
}
|
|
|
|
{
|
|
/* Fill (uniform) modes, mvs of jth subset.
|
|
Must do it here because ensuing subsets can
|
|
refer back to us via "left" or "above". */
|
|
const unsigned char *fill_offset;
|
|
unsigned int fill_count = mbsplit_fill_count[s];
|
|
|
|
fill_offset = &mbsplit_fill_offset[s][(unsigned char)j * mbsplit_fill_count[s]];
|
|
|
|
do {
|
|
mi->bmi[ *fill_offset].as_mv.first.as_int = blockmv.as_int;
|
|
if (mbmi->second_ref_frame)
|
|
mi->bmi[ *fill_offset].as_mv.second.as_int = secondmv.as_int;
|
|
fill_offset++;
|
|
}while (--fill_count);
|
|
}
|
|
|
|
}
|
|
while (++j < num_p);
|
|
}
|
|
|
|
mv->as_int = mi->bmi[15].as_mv.first.as_int;
|
|
mbmi->second_mv.as_int = mi->bmi[15].as_mv.second.as_int;
|
|
|
|
break; /* done with SPLITMV */
|
|
|
|
case NEARMV:
|
|
mv->as_int = nearby.as_int;
|
|
/* Clip "next_nearest" so that it does not extend to far out of image */
|
|
vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
|
|
mb_to_top_edge, mb_to_bottom_edge);
|
|
if (mbmi->second_ref_frame)
|
|
{
|
|
mbmi->second_mv.as_int = nearby_second.as_int;
|
|
vp8_clamp_mv(&mbmi->second_mv, mb_to_left_edge, mb_to_right_edge,
|
|
mb_to_top_edge, mb_to_bottom_edge);
|
|
}
|
|
break;
|
|
|
|
case NEARESTMV:
|
|
mv->as_int = nearest.as_int;
|
|
/* Clip "next_nearest" so that it does not extend to far out of image */
|
|
vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
|
|
mb_to_top_edge, mb_to_bottom_edge);
|
|
if (mbmi->second_ref_frame)
|
|
{
|
|
mbmi->second_mv.as_int = nearest_second.as_int;
|
|
vp8_clamp_mv(&mbmi->second_mv, mb_to_left_edge, mb_to_right_edge,
|
|
mb_to_top_edge, mb_to_bottom_edge);
|
|
}
|
|
break;
|
|
|
|
case ZEROMV:
|
|
mv->as_int = 0;
|
|
if (mbmi->second_ref_frame)
|
|
mbmi->second_mv.as_int = 0;
|
|
break;
|
|
|
|
case NEWMV:
|
|
#if CONFIG_HIGH_PRECISION_MV
|
|
if (xd->allow_high_precision_mv)
|
|
read_mv_hp(bc, &mv->as_mv, (const MV_CONTEXT_HP *) mvc_hp);
|
|
else
|
|
#endif
|
|
read_mv(bc, &mv->as_mv, (const MV_CONTEXT *) mvc);
|
|
mv->as_mv.row += best_mv.as_mv.row;
|
|
mv->as_mv.col += best_mv.as_mv.col;
|
|
|
|
/* Don't need to check this on NEARMV and NEARESTMV modes
|
|
* since those modes clamp the MV. The NEWMV mode does not,
|
|
* so signal to the prediction stage whether special
|
|
* handling may be required.
|
|
*/
|
|
mbmi->need_to_clamp_mvs = vp8_check_mv_bounds(mv,
|
|
mb_to_left_edge,
|
|
mb_to_right_edge,
|
|
mb_to_top_edge,
|
|
mb_to_bottom_edge);
|
|
if (mbmi->second_ref_frame)
|
|
{
|
|
#if CONFIG_HIGH_PRECISION_MV
|
|
if (xd->allow_high_precision_mv)
|
|
read_mv_hp(bc, &mbmi->second_mv.as_mv,
|
|
(const MV_CONTEXT_HP *) mvc_hp);
|
|
else
|
|
#endif
|
|
read_mv(bc, &mbmi->second_mv.as_mv, (const MV_CONTEXT *) mvc);
|
|
mbmi->second_mv.as_mv.row += best_mv_second.as_mv.row;
|
|
mbmi->second_mv.as_mv.col += best_mv_second.as_mv.col;
|
|
mbmi->need_to_clamp_secondmv |= vp8_check_mv_bounds(&mbmi->second_mv,
|
|
mb_to_left_edge,
|
|
mb_to_right_edge,
|
|
mb_to_top_edge,
|
|
mb_to_bottom_edge);
|
|
}
|
|
break;
|
|
default:;
|
|
#if CONFIG_DEBUG
|
|
assert(0);
|
|
#endif
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* required for left and above block mv */
|
|
mbmi->mv.as_int = 0;
|
|
|
|
if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
|
|
mbmi->mode = (MB_PREDICTION_MODE)
|
|
get_segdata( xd, mbmi->segment_id, SEG_LVL_MODE );
|
|
else
|
|
{
|
|
mbmi->mode = (MB_PREDICTION_MODE)
|
|
vp8_read_ymode(bc, pbi->common.fc.ymode_prob);
|
|
}
|
|
#if CONFIG_COMP_INTRA_PRED
|
|
mbmi->second_mode = (MB_PREDICTION_MODE) (DC_PRED - 1);
|
|
#endif
|
|
|
|
// If MB mode is BPRED read the block modes
|
|
if (mbmi->mode == B_PRED)
|
|
{
|
|
int j = 0;
|
|
#if CONFIG_COMP_INTRA_PRED
|
|
int use_comp_pred = vp8_read(bc, 128);
|
|
#endif
|
|
do
|
|
{
|
|
mi->bmi[j].as_mode.first = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob);
|
|
#if CONFIG_COMP_INTRA_PRED
|
|
if (use_comp_pred)
|
|
{
|
|
mi->bmi[j].as_mode.second = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob);
|
|
}
|
|
else
|
|
{
|
|
mi->bmi[j].as_mode.second = (B_PREDICTION_MODE) (B_DC_PRED - 1);
|
|
}
|
|
#endif
|
|
}
|
|
while (++j < 16);
|
|
}
|
|
|
|
if(mbmi->mode == I8X8_PRED)
|
|
{
|
|
int i;
|
|
int mode8x8;
|
|
for(i=0;i<4;i++)
|
|
{
|
|
int ib = vp8_i8x8_block[i];
|
|
mode8x8 = vp8_read_i8x8_mode(bc, pbi->common.i8x8_mode_prob);
|
|
mi->bmi[ib+0].as_mode.first= mode8x8;
|
|
mi->bmi[ib+1].as_mode.first= mode8x8;
|
|
mi->bmi[ib+4].as_mode.first= mode8x8;
|
|
mi->bmi[ib+5].as_mode.first= mode8x8;
|
|
#if CONFIG_COMP_INTRA_PRED
|
|
mi->bmi[ib+0].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
|
|
mi->bmi[ib+1].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
|
|
mi->bmi[ib+4].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
|
|
mi->bmi[ib+5].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1);
|
|
#endif
|
|
}
|
|
}
|
|
else
|
|
#if CONFIG_UVINTRA
|
|
mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
|
|
pbi->common.fc.uv_mode_prob[mbmi->mode]);
|
|
#else
|
|
mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
|
|
pbi->common.fc.uv_mode_prob);
|
|
#endif /*CONFIG_UVINTRA*/
|
|
#if CONFIG_COMP_INTRA_PRED
|
|
mbmi->second_uv_mode = (MB_PREDICTION_MODE) (DC_PRED - 1);
|
|
#endif
|
|
}
|
|
|
|
}
|
|
|
|
void vp8_decode_mode_mvs(VP8D_COMP *pbi)
|
|
{
|
|
int i;
|
|
VP8_COMMON *cm = &pbi->common;
|
|
MODE_INFO *mi = cm->mi;
|
|
MACROBLOCKD *const xd = &pbi->mb;
|
|
int sb_row, sb_col;
|
|
int sb_rows = (cm->mb_rows + 1)>>1;
|
|
int sb_cols = (cm->mb_cols + 1)>>1;
|
|
int row_delta[4] = { 0, +1, 0, -1};
|
|
int col_delta[4] = {+1, -1, +1, +1};
|
|
|
|
MODE_INFO *prev_mi = cm->prev_mi;
|
|
|
|
mb_mode_mv_init(pbi);
|
|
|
|
#if CONFIG_QIMODE
|
|
if(cm->frame_type==KEY_FRAME && !cm->kf_ymode_probs_update)
|
|
{
|
|
cm->kf_ymode_probs_index = vp8_read_literal(&pbi->bc, 3);
|
|
}
|
|
#endif
|
|
|
|
for (sb_row=0; sb_row<sb_rows; sb_row++)
|
|
{
|
|
int mb_col = 0;
|
|
int mb_row = (sb_row <<1);
|
|
|
|
for (sb_col=0; sb_col<sb_cols; sb_col++)
|
|
{
|
|
for ( i=0; i<4; i++ )
|
|
{
|
|
int mb_to_top_edge;
|
|
int mb_to_bottom_edge;
|
|
|
|
int dy = row_delta[i];
|
|
int dx = col_delta[i];
|
|
int offset_extended = dy * cm->mode_info_stride + dx;
|
|
|
|
if ((mb_row >= cm->mb_rows) || (mb_col >= cm->mb_cols))
|
|
{
|
|
/* next macroblock */
|
|
mb_row += dy;
|
|
mb_col += dx;
|
|
mi += offset_extended;
|
|
prev_mi += offset_extended;
|
|
continue;
|
|
}
|
|
|
|
// Make sure the MacroBlockD mode info pointer is set correctly
|
|
xd->mode_info_context = mi;
|
|
xd->prev_mode_info_context = prev_mi;
|
|
|
|
pbi->mb.mb_to_top_edge = mb_to_top_edge = -((mb_row * 16)) << 3;
|
|
mb_to_top_edge -= LEFT_TOP_MARGIN;
|
|
|
|
pbi->mb.mb_to_bottom_edge =
|
|
mb_to_bottom_edge =
|
|
((pbi->common.mb_rows - 1 - mb_row) * 16) << 3;
|
|
mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
|
|
|
|
if(cm->frame_type == KEY_FRAME)
|
|
vp8_kfread_modes(pbi, mi, mb_row, mb_col);
|
|
else
|
|
read_mb_modes_mv(pbi, mi, &mi->mbmi, prev_mi, mb_row,
|
|
mb_col);
|
|
|
|
/* next macroblock */
|
|
mb_row += dy;
|
|
mb_col += dx;
|
|
mi += offset_extended;
|
|
prev_mi += offset_extended;
|
|
}
|
|
}
|
|
|
|
mi += cm->mode_info_stride + (1 - (cm->mb_cols & 0x1));
|
|
prev_mi += cm->mode_info_stride + (1 - (cm->mb_cols & 0x1));
|
|
}
|
|
}
|