| /* |
| 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 "treereader.h" |
| #include "vp8/common/entropymv.h" |
| #include "vp8/common/entropymode.h" |
| #include "onyxd_int.h" |
| #include "vp8/common/findnearmv.h" |
| |
| #include "vp8/common/seg_common.h" |
| #include "vp8/common/pred_common.h" |
| #include "vp8/common/entropy.h" |
| |
| #if CONFIG_DEBUG |
| #include <assert.h> |
| #endif |
| |
| //#define DEBUG_DEC_MV |
| #ifdef DEBUG_DEC_MV |
| int dec_mvcount = 0; |
| #endif |
| |
| static int vp8_read_bmode(vp8_reader *bc, const vp8_prob *p) |
| { |
| const int i = vp8_treed_read(bc, vp8_bmode_tree, p); |
| |
| return i; |
| } |
| |
| |
| static int vp8_read_ymode(vp8_reader *bc, const vp8_prob *p) |
| { |
| const int i = vp8_treed_read(bc, vp8_ymode_tree, p); |
| |
| return i; |
| } |
| |
| static int vp8_kfread_ymode(vp8_reader *bc, const vp8_prob *p) |
| { |
| const int i = vp8_treed_read(bc, vp8_kf_ymode_tree, p); |
| |
| return i; |
| } |
| static int vp8_read_i8x8_mode(vp8_reader *bc, const vp8_prob *p) |
| { |
| const int i = vp8_treed_read(bc, vp8_i8x8_mode_tree, p); |
| |
| return i; |
| } |
| |
| |
| static int vp8_read_uv_mode(vp8_reader *bc, const vp8_prob *p) |
| { |
| const int i = vp8_treed_read(bc, vp8_uv_mode_tree, p); |
| |
| return i; |
| } |
| |
| // This function reads the current macro block's segnent id from the bitstream |
| // It should only be called if a segment map update is indicated. |
| static void vp8_read_mb_segid(vp8_reader *r, MB_MODE_INFO *mi, MACROBLOCKD *x) |
| { |
| /* Is segmentation enabled */ |
| if (x->segmentation_enabled && x->update_mb_segmentation_map) |
| { |
| /* If so then read the segment id. */ |
| if (vp8_read(r, x->mb_segment_tree_probs[0])) |
| mi->segment_id = (unsigned char)(2 + vp8_read(r, x->mb_segment_tree_probs[2])); |
| else |
| mi->segment_id = (unsigned char)(vp8_read(r, x->mb_segment_tree_probs[1])); |
| } |
| } |
| |
| extern const int vp8_i8x8_block[4]; |
| static void vp8_kfread_modes(VP8D_COMP *pbi, |
| MODE_INFO *m, |
| int mb_row, |
| int mb_col) |
| { |
| VP8_COMMON *const cm = & pbi->common; |
| vp8_reader *const bc = & pbi->bc; |
| const int mis = pbi->common.mode_info_stride; |
| int map_index = mb_row * pbi->common.mb_cols + mb_col; |
| MB_PREDICTION_MODE y_mode; |
| |
| // Read the Macroblock segmentation map if it is being updated explicitly |
| // this frame (reset to 0 by default). |
| m->mbmi.segment_id = 0; |
| if (pbi->mb.update_mb_segmentation_map) |
| { |
| vp8_read_mb_segid(bc, &m->mbmi, &pbi->mb); |
| pbi->common.last_frame_seg_map[map_index] = m->mbmi.segment_id; |
| } |
| |
| m->mbmi.mb_skip_coeff = 0; |
| if ( pbi->common.mb_no_coeff_skip && |
| ( !segfeature_active( &pbi->mb, |
| m->mbmi.segment_id, SEG_LVL_EOB ) || |
| ( get_segdata( &pbi->mb, |
| m->mbmi.segment_id, SEG_LVL_EOB ) != 0 ) ) ) |
| { |
| #if CONFIG_NEWENTROPY |
| MACROBLOCKD *const xd = & pbi->mb; |
| m->mbmi.mb_skip_coeff = vp8_read(bc, get_pred_prob(cm, xd, PRED_MBSKIP)); |
| #else |
| m->mbmi.mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false); |
| #endif |
| } |
| else |
| { |
| if ( segfeature_active( &pbi->mb, |
| m->mbmi.segment_id, SEG_LVL_EOB ) && |
| ( get_segdata( &pbi->mb, |
| m->mbmi.segment_id, SEG_LVL_EOB ) == 0 ) ) |
| { |
| m->mbmi.mb_skip_coeff = 1; |
| } |
| else |
| m->mbmi.mb_skip_coeff = 0; |
| } |
| |
| #if CONFIG_QIMODE |
| y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc, |
| pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]); |
| #else |
| y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode( |
| bc, pbi->common.kf_ymode_prob); |
| #endif |
| #if CONFIG_COMP_INTRA_PRED |
| m->mbmi.second_mode = (MB_PREDICTION_MODE) (DC_PRED - 1); |
| #endif |
| |
| m->mbmi.ref_frame = INTRA_FRAME; |
| |
| if ((m->mbmi.mode = y_mode) == B_PRED) |
| { |
| int i = 0; |
| #if CONFIG_COMP_INTRA_PRED |
| int use_comp_pred = vp8_read(bc, 128); |
| #endif |
| do |
| { |
| const B_PREDICTION_MODE A = above_block_mode(m, i, mis); |
| const B_PREDICTION_MODE L = left_block_mode(m, i); |
| |
| m->bmi[i].as_mode.first = |
| (B_PREDICTION_MODE) vp8_read_bmode( |
| bc, pbi->common.kf_bmode_prob [A] [L]); |
| #if CONFIG_COMP_INTRA_PRED |
| if (use_comp_pred) |
| { |
| m->bmi[i].as_mode.second = |
| (B_PREDICTION_MODE) vp8_read_bmode( |
| bc, pbi->common.kf_bmode_prob [A] [L]); |
| } |
| else |
| { |
| m->bmi[i].as_mode.second = (B_PREDICTION_MODE) (B_DC_PRED - 1); |
| } |
| #endif |
| } |
| while (++i < 16); |
| } |
| if((m->mbmi.mode = y_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); |
| m->bmi[ib+0].as_mode.first= mode8x8; |
| m->bmi[ib+1].as_mode.first= mode8x8; |
| m->bmi[ib+4].as_mode.first= mode8x8; |
| m->bmi[ib+5].as_mode.first= mode8x8; |
| #if CONFIG_COMP_INTRA_PRED |
| m->bmi[ib+0].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1); |
| m->bmi[ib+1].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1); |
| m->bmi[ib+4].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1); |
| m->bmi[ib+5].as_mode.second= (MB_PREDICTION_MODE) (DC_PRED - 1); |
| #endif |
| } |
| } |
| else |
| #if CONFIG_UVINTRA |
| m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, |
| pbi->common.kf_uv_mode_prob[m->mbmi.mode]); |
| #else |
| m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, |
| pbi->common.kf_uv_mode_prob); |
| #endif |
| #if CONFIG_COMP_INTRA_PRED |
| m->mbmi.second_uv_mode = (MB_PREDICTION_MODE) (DC_PRED - 1); |
| #endif |
| |
| } |
| |
| static int read_mvcomponent(vp8_reader *r, const MV_CONTEXT *mvc) |
| { |
| const vp8_prob *const p = (const vp8_prob *) mvc; |
| int x = 0; |
| |
| if (vp8_read(r, p [mvpis_short])) /* Large */ |
| { |
| int i = 0; |
| |
| do |
| { |
| x += vp8_read(r, p [MVPbits + i]) << i; |
| } |
| while (++i < mvnum_short_bits); |
| |
| i = mvlong_width - 1; /* Skip bit 3, which is sometimes implicit */ |
| |
| do |
| { |
| x += vp8_read(r, p [MVPbits + i]) << i; |
| } |
| while (--i > mvnum_short_bits); |
| |
| if (!(x & ~((2<<mvnum_short_bits)-1)) || vp8_read(r, p [MVPbits + mvnum_short_bits])) |
| x += (mvnum_short); |
| } |
| else /* small */ |
| x = vp8_treed_read(r, vp8_small_mvtree, p + MVPshort); |
| |
| if (x && vp8_read(r, p [MVPsign])) |
| x = -x; |
| |
| return x; |
| } |
| |
| static void read_mv(vp8_reader *r, MV *mv, const MV_CONTEXT *mvc) |
| { |
| mv->row = (short)(read_mvcomponent(r, mvc) << 1); |
| mv->col = (short)(read_mvcomponent(r, ++mvc) << 1); |
| #ifdef DEBUG_DEC_MV |
| int i; |
| printf("%d (np): %d %d\n", dec_mvcount++, mv->row, mv->col); |
| //for (i=0; i<MVPcount;++i) printf(" %d", (&mvc[-1])->prob[i]); printf("\n"); |
| //for (i=0; i<MVPcount;++i) printf(" %d", (&mvc[0])->prob[i]); printf("\n"); |
| #endif |
| } |
| |
| |
| static void read_mvcontexts(vp8_reader *bc, MV_CONTEXT *mvc) |
| { |
| int i = 0; |
| |
| do |
| { |
| const vp8_prob *up = vp8_mv_update_probs[i].prob; |
| vp8_prob *p = (vp8_prob *)(mvc + i); |
| vp8_prob *const pstop = p + MVPcount; |
| |
| do |
| { |
| if (vp8_read(bc, *up++)) |
| { |
| const vp8_prob x = (vp8_prob)vp8_read_literal(bc, 7); |
| |
| *p = x ? x << 1 : 1; |
| } |
| } |
| while (++p < pstop); |
| } |
| while (++i < 2); |
| } |
| |
| #if CONFIG_HIGH_PRECISION_MV |
| static int read_mvcomponent_hp(vp8_reader *r, const MV_CONTEXT_HP *mvc) |
| { |
| const vp8_prob *const p = (const vp8_prob *) mvc; |
| int x = 0; |
| |
| if (vp8_read(r, p [mvpis_short_hp])) /* Large */ |
| { |
| int i = 0; |
| |
| do |
| { |
| x += vp8_read(r, p [MVPbits_hp + i]) << i; |
| } |
| while (++i < mvnum_short_bits_hp); |
| |
| i = mvlong_width_hp - 1; /* Skip bit 3, which is sometimes implicit */ |
| |
| do |
| { |
| x += vp8_read(r, p [MVPbits_hp + i]) << i; |
| } |
| while (--i > mvnum_short_bits_hp); |
| |
| if (!(x & ~((2<<mvnum_short_bits_hp)-1)) || vp8_read(r, p [MVPbits_hp + mvnum_short_bits_hp])) |
| x += (mvnum_short_hp); |
| } |
| else /* small */ |
| x = vp8_treed_read(r, vp8_small_mvtree_hp, p + MVPshort_hp); |
| |
| if (x && vp8_read(r, p [MVPsign_hp])) |
| x = -x; |
| |
| return x; |
| } |
| |
| static void read_mv_hp(vp8_reader *r, MV *mv, const MV_CONTEXT_HP *mvc) |
| { |
| mv->row = (short)(read_mvcomponent_hp(r, mvc)); |
| mv->col = (short)(read_mvcomponent_hp(r, ++mvc)); |
| #ifdef DEBUG_DEC_MV |
| int i; |
| printf("%d (hp): %d %d\n", dec_mvcount++, mv->row, mv->col); |
| //for (i=0; i<MVPcount_hp;++i) printf(" %d", (&mvc[-1])->prob[i]); printf("\n"); |
| //for (i=0; i<MVPcount_hp;++i) printf(" %d", (&mvc[0])->prob[i]); printf("\n"); |
| #endif |
| } |
| |
| static void read_mvcontexts_hp(vp8_reader *bc, MV_CONTEXT_HP *mvc) |
| { |
| int i = 0; |
| |
| do |
| { |
| const vp8_prob *up = vp8_mv_update_probs_hp[i].prob; |
| vp8_prob *p = (vp8_prob *)(mvc + i); |
| vp8_prob *const pstop = p + MVPcount_hp; |
| |
| do |
| { |
| if (vp8_read(bc, *up++)) |
| { |
| const vp8_prob x = (vp8_prob)vp8_read_literal(bc, 7); |
| |
| *p = x ? x << 1 : 1; |
| } |
| } |
| while (++p < pstop); |
| } |
| while (++i < 2); |
| } |
| #endif /* CONFIG_HIGH_PRECISION_MV */ |
| |
| // Read the referncence frame |
| static MV_REFERENCE_FRAME read_ref_frame( VP8D_COMP *pbi, |
| vp8_reader *const bc, |
| unsigned char segment_id ) |
| { |
| MV_REFERENCE_FRAME ref_frame; |
| int seg_ref_active; |
| int seg_ref_count = 0; |
| |
| VP8_COMMON *const cm = & pbi->common; |
| MACROBLOCKD *const xd = &pbi->mb; |
| |
| seg_ref_active = segfeature_active( xd, |
| segment_id, |
| SEG_LVL_REF_FRAME ); |
| |
| // If segment coding enabled does the segment allow for more than one |
| // possible reference frame |
| if ( seg_ref_active ) |
| { |
| seg_ref_count = check_segref( xd, segment_id, INTRA_FRAME ) + |
| check_segref( xd, segment_id, LAST_FRAME ) + |
| check_segref( xd, segment_id, GOLDEN_FRAME ) + |
| check_segref( xd, segment_id, ALTREF_FRAME ); |
| } |
| |
| // Segment reference frame features not available or allows for |
| // multiple reference frame options |
| if ( !seg_ref_active || (seg_ref_count > 1) ) |
| { |
| // Values used in prediction model coding |
| unsigned char prediction_flag; |
| vp8_prob pred_prob; |
| MV_REFERENCE_FRAME pred_ref; |
| |
| // Get the context probability the prediction flag |
| pred_prob = get_pred_prob( cm, xd, PRED_REF ); |
| |
| // Read the prediction status flag |
| prediction_flag = (unsigned char)vp8_read( bc, pred_prob ); |
| |
| // Store the prediction flag. |
| set_pred_flag( xd, PRED_REF, prediction_flag ); |
| |
| // Get the predicted reference frame. |
| pred_ref = get_pred_ref( cm, xd ); |
| |
| // If correctly predicted then use the predicted value |
| if ( prediction_flag ) |
| { |
| ref_frame = pred_ref; |
| } |
| // else decode the explicitly coded value |
| else |
| { |
| vp8_prob mod_refprobs[PREDICTION_PROBS]; |
| vpx_memcpy( mod_refprobs, |
| cm->mod_refprobs[pred_ref], sizeof(mod_refprobs) ); |
| |
| // If segment coding enabled blank out options that cant occur by |
| // setting the branch probability to 0. |
| if ( seg_ref_active ) |
| { |
| mod_refprobs[INTRA_FRAME] *= |
| check_segref( xd, segment_id, INTRA_FRAME ); |
| mod_refprobs[LAST_FRAME] *= |
| check_segref( xd, segment_id, LAST_FRAME ); |
| mod_refprobs[GOLDEN_FRAME] *= |
| ( check_segref( xd, segment_id, GOLDEN_FRAME ) * |
| check_segref( xd, segment_id, ALTREF_FRAME ) ); |
| } |
| |
| // Default to INTRA_FRAME (value 0) |
| ref_frame = INTRA_FRAME; |
| |
| // Do we need to decode the Intra/Inter branch |
| if ( mod_refprobs[0] ) |
| ref_frame = (MV_REFERENCE_FRAME) vp8_read(bc, mod_refprobs[0]); |
| else |
| ref_frame ++; |
| |
| if (ref_frame) |
| { |
| // Do we need to decode the Last/Gf_Arf branch |
| if ( mod_refprobs[1] ) |
| ref_frame += vp8_read(bc, mod_refprobs[1]); |
| else |
| ref_frame++; |
| |
| if ( ref_frame > 1 ) |
| { |
| // Do we need to decode the GF/Arf branch |
| if ( mod_refprobs[2] ) |
| ref_frame += vp8_read(bc, mod_refprobs[2]); |
| else |
| { |
| if ( seg_ref_active ) |
| { |
| if ( (pred_ref == GOLDEN_FRAME) || |
| !check_segref( xd, segment_id, GOLDEN_FRAME) ) |
| { |
| ref_frame = ALTREF_FRAME; |
| } |
| else |
| ref_frame = GOLDEN_FRAME; |
| } |
| else |
| ref_frame = (pred_ref == GOLDEN_FRAME) |
| ? ALTREF_FRAME : GOLDEN_FRAME; |
| } |
| } |
| } |
| } |
| } |
| |
| // Segment reference frame features are enabled |
| else |
| { |
| // The reference frame for the mb is considered as correclty predicted |
| // if it is signaled at the segment level for the purposes of the |
| // common prediction model |
| set_pred_flag( xd, PRED_REF, 1 ); |
| ref_frame = get_pred_ref( cm, xd ); |
| } |
| |
| return (MV_REFERENCE_FRAME)ref_frame; |
| } |
| |
| 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; |
| 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); |
| } |
| |
| 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; |
| int_mv blockmv; |
| int k; /* first block in subset j */ |
| int mv_contz; |
| k = vp8_mbsplit_offset[s][j]; |
| |
| leftmv.as_int = left_block_mv(mi, k); |
| abovemv.as_int = above_block_mv(mi, k, mis); |
| mv_contz = vp8_mv_cont(&leftmv, &abovemv); |
| |
| switch (sub_mv_ref(bc, vp8_sub_mv_ref_prob2 [mv_contz])) /*pc->fc.sub_mv_ref_prob))*/ |
| { |
| 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; |
| #ifdef VPX_MODE_COUNT |
| vp8_mv_cont_count[mv_contz][3]++; |
| #endif |
| break; |
| case LEFT4X4: |
| blockmv.as_int = leftmv.as_int; |
| #ifdef VPX_MODE_COUNT |
| vp8_mv_cont_count[mv_contz][0]++; |
| #endif |
| break; |
| case ABOVE4X4: |
| blockmv.as_int = abovemv.as_int; |
| #ifdef VPX_MODE_COUNT |
| vp8_mv_cont_count[mv_contz][1]++; |
| #endif |
| break; |
| case ZERO4X4: |
| blockmv.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); |
| |
| { |
| /* 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].mv.as_int = blockmv.as_int; |
| fill_offset++; |
| }while (--fill_count); |
| } |
| |
| } |
| while (++j < num_p); |
| } |
| |
| mv->as_int = mi->bmi[15].mv.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); |
| goto propagate_mv; |
| |
| 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); |
| goto propagate_mv; |
| |
| case ZEROMV: |
| mv->as_int = 0; |
| goto propagate_mv; |
| |
| 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); |
| |
| propagate_mv: /* same MV throughout */ |
| |
| if ( cm->comp_pred_mode == COMP_PREDICTION_ONLY || |
| (cm->comp_pred_mode == HYBRID_PREDICTION && |
| vp8_read(bc, get_pred_prob( cm, xd, PRED_COMP ))) ) |
| { |
| mbmi->second_ref_frame = mbmi->ref_frame + 1; |
| if (mbmi->second_ref_frame == 4) |
| mbmi->second_ref_frame = 1; |
| } |
| if (mbmi->second_ref_frame) |
| { |
| vp8_find_near_mvs(xd, mi, |
| prev_mi, |
| &nearest, &nearby, &best_mv, rct, |
| (int)mbmi->second_ref_frame, |
| pbi->common.ref_frame_sign_bias); |
| switch (mbmi->mode) { |
| case ZEROMV: |
| mbmi->second_mv.as_int = 0; |
| break; |
| case NEARMV: |
| mbmi->second_mv.as_int = nearby.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: |
| mbmi->second_mv.as_int = nearest.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 NEWMV: |
| #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.as_mv.row; |
| mbmi->second_mv.as_mv.col += best_mv.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: |
| break; |
| } |
| } |
| |
| 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)); |
| } |
| } |
