/* 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 "vp9/common/entropymv.h" #include "vp9/common/entropymode.h" #include "onyxd_int.h" #include "vp9/common/findnearmv.h" #include "vp9/common/seg_common.h" #include "vp9/common/pred_common.h" #include "vp9/common/entropy.h" #include "vp9/decoder/decodemv.h" #if CONFIG_DEBUG #include #endif // #define DEBUG_DEC_MV #ifdef DEBUG_DEC_MV int dec_mvcount = 0; #endif static int read_bmode(vp9_reader *bc, const vp9_prob *p) { B_PREDICTION_MODE m = treed_read(bc, vp9_bmode_tree, p); #if CONFIG_NEWBINTRAMODES if (m == B_CONTEXT_PRED - CONTEXT_PRED_REPLACEMENTS) m = B_CONTEXT_PRED; assert(m < B_CONTEXT_PRED - CONTEXT_PRED_REPLACEMENTS || m == B_CONTEXT_PRED); #endif return m; } static int read_kf_bmode(vp9_reader *bc, const vp9_prob *p) { return treed_read(bc, vp9_kf_bmode_tree, p); } static int read_ymode(vp9_reader *bc, const vp9_prob *p) { return treed_read(bc, vp9_ymode_tree, p); } #if CONFIG_SUPERBLOCKS static int read_kf_sb_ymode(vp9_reader *bc, const vp9_prob *p) { return treed_read(bc, vp9_uv_mode_tree, p); } #endif static int read_kf_mb_ymode(vp9_reader *bc, const vp9_prob *p) { return treed_read(bc, vp9_kf_ymode_tree, p); } static int read_i8x8_mode(vp9_reader *bc, const vp9_prob *p) { return treed_read(bc, vp9_i8x8_mode_tree, p); } static int read_uv_mode(vp9_reader *bc, const vp9_prob *p) { return treed_read(bc, vp9_uv_mode_tree, p); } // 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 read_mb_segid(vp9_reader *r, MB_MODE_INFO *mi, MACROBLOCKD *xd) { /* Is segmentation enabled */ if (xd->segmentation_enabled && xd->update_mb_segmentation_map) { /* If so then read the segment id. */ if (vp9_read(r, xd->mb_segment_tree_probs[0])) mi->segment_id = (unsigned char)(2 + vp9_read(r, xd->mb_segment_tree_probs[2])); else mi->segment_id = (unsigned char)(vp9_read(r, xd->mb_segment_tree_probs[1])); } } #if CONFIG_NEW_MVREF int vp9_read_mv_ref_id(vp9_reader *r, vp9_prob * ref_id_probs) { int ref_index = 0; if (vp9_read(r, ref_id_probs[0])) { ref_index++; if (vp9_read(r, ref_id_probs[1])) { ref_index++; if (vp9_read(r, ref_id_probs[2])) ref_index++; } } return ref_index; } #endif extern const int vp9_i8x8_block[4]; static void kfread_modes(VP9D_COMP *pbi, MODE_INFO *m, int mb_row, int mb_col, BOOL_DECODER* const bc) { VP9_COMMON *const cm = &pbi->common; 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) { 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 && (!vp9_segfeature_active(&pbi->mb, m->mbmi.segment_id, SEG_LVL_EOB) || (vp9_get_segdata(&pbi->mb, m->mbmi.segment_id, SEG_LVL_EOB) != 0))) { MACROBLOCKD *const xd = &pbi->mb; m->mbmi.mb_skip_coeff = vp9_read(bc, vp9_get_pred_prob(cm, xd, PRED_MBSKIP)); } else { if (vp9_segfeature_active(&pbi->mb, m->mbmi.segment_id, SEG_LVL_EOB) && (vp9_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_SUPERBLOCKS if (m->mbmi.encoded_as_sb) { y_mode = (MB_PREDICTION_MODE) read_kf_sb_ymode(bc, pbi->common.sb_kf_ymode_prob[pbi->common.kf_ymode_probs_index]); } else #endif y_mode = (MB_PREDICTION_MODE) read_kf_mb_ymode(bc, pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]); #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 = vp9_read(bc, DEFAULT_COMP_INTRA_PROB); #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) read_kf_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) read_kf_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 = vp9_i8x8_block[i]; mode8x8 = read_i8x8_mode(bc, pbi->common.fc.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 m->mbmi.uv_mode = (MB_PREDICTION_MODE)read_uv_mode(bc, pbi->common.kf_uv_mode_prob[m->mbmi.mode]); #if CONFIG_COMP_INTRA_PRED m->mbmi.second_uv_mode = (MB_PREDICTION_MODE)(DC_PRED - 1); #endif if (cm->txfm_mode == TX_MODE_SELECT && m->mbmi.mb_skip_coeff == 0 && m->mbmi.mode <= I8X8_PRED) { // FIXME(rbultje) code ternary symbol once all experiments are merged m->mbmi.txfm_size = vp9_read(bc, cm->prob_tx[0]); if (m->mbmi.txfm_size != TX_4X4 && m->mbmi.mode != I8X8_PRED) m->mbmi.txfm_size += vp9_read(bc, cm->prob_tx[1]); } else if (cm->txfm_mode >= ALLOW_16X16 && m->mbmi.mode <= TM_PRED) { m->mbmi.txfm_size = TX_16X16; } else if (cm->txfm_mode >= ALLOW_8X8 && m->mbmi.mode != B_PRED) { m->mbmi.txfm_size = TX_8X8; } else { m->mbmi.txfm_size = TX_4X4; } } static int read_nmv_component(vp9_reader *r, int rv, const nmv_component *mvcomp) { int v, s, z, c, o, d; s = vp9_read(r, mvcomp->sign); c = treed_read(r, vp9_mv_class_tree, mvcomp->classes); if (c == MV_CLASS_0) { d = treed_read(r, vp9_mv_class0_tree, mvcomp->class0); } else { int i, b; d = 0; b = c + CLASS0_BITS - 1; /* number of bits */ for (i = 0; i < b; ++i) d |= (vp9_read(r, mvcomp->bits[i]) << i); } o = d << 3; z = vp9_get_mv_mag(c, o); v = (s ? -(z + 8) : (z + 8)); return v; } static int read_nmv_component_fp(vp9_reader *r, int v, int rv, const nmv_component *mvcomp, int usehp) { int s, z, c, o, d, e, f; s = v < 0; z = (s ? -v : v) - 1; /* magnitude - 1 */ z &= ~7; c = vp9_get_mv_class(z, &o); d = o >> 3; if (c == MV_CLASS_0) { f = treed_read(r, vp9_mv_fp_tree, mvcomp->class0_fp[d]); } else { f = treed_read(r, vp9_mv_fp_tree, mvcomp->fp); } o += (f << 1); if (usehp) { if (c == MV_CLASS_0) { e = vp9_read(r, mvcomp->class0_hp); } else { e = vp9_read(r, mvcomp->hp); } o += e; } else { ++o; /* Note if hp is not used, the default value of the hp bit is 1 */ } z = vp9_get_mv_mag(c, o); v = (s ? -(z + 1) : (z + 1)); return v; } static void read_nmv(vp9_reader *r, MV *mv, const MV *ref, const nmv_context *mvctx) { MV_JOINT_TYPE j = treed_read(r, vp9_mv_joint_tree, mvctx->joints); mv->row = mv-> col = 0; if (j == MV_JOINT_HZVNZ || j == MV_JOINT_HNZVNZ) { mv->row = read_nmv_component(r, ref->row, &mvctx->comps[0]); } if (j == MV_JOINT_HNZVZ || j == MV_JOINT_HNZVNZ) { mv->col = read_nmv_component(r, ref->col, &mvctx->comps[1]); } } static void read_nmv_fp(vp9_reader *r, MV *mv, const MV *ref, const nmv_context *mvctx, int usehp) { MV_JOINT_TYPE j = vp9_get_mv_joint(*mv); usehp = usehp && vp9_use_nmv_hp(ref); if (j == MV_JOINT_HZVNZ || j == MV_JOINT_HNZVNZ) { mv->row = read_nmv_component_fp(r, mv->row, ref->row, &mvctx->comps[0], usehp); } if (j == MV_JOINT_HNZVZ || j == MV_JOINT_HNZVNZ) { mv->col = read_nmv_component_fp(r, mv->col, ref->col, &mvctx->comps[1], usehp); } //printf(" %d: %d %d ref: %d %d\n", usehp, mv->row, mv-> col, ref->row, ref->col); } static void update_nmv(vp9_reader *bc, vp9_prob *const p, const vp9_prob upd_p) { if (vp9_read(bc, upd_p)) { #ifdef LOW_PRECISION_MV_UPDATE *p = (vp9_read_literal(bc, 7) << 1) | 1; #else *p = (vp9_read_literal(bc, 8)); #endif } } static void read_nmvprobs(vp9_reader *bc, nmv_context *mvctx, int usehp) { int i, j, k; #ifdef MV_GROUP_UPDATE if (!vp9_read_bit(bc)) return; #endif for (j = 0; j < MV_JOINTS - 1; ++j) { update_nmv(bc, &mvctx->joints[j], VP9_NMV_UPDATE_PROB); } for (i = 0; i < 2; ++i) { update_nmv(bc, &mvctx->comps[i].sign, VP9_NMV_UPDATE_PROB); for (j = 0; j < MV_CLASSES - 1; ++j) { update_nmv(bc, &mvctx->comps[i].classes[j], VP9_NMV_UPDATE_PROB); } for (j = 0; j < CLASS0_SIZE - 1; ++j) { update_nmv(bc, &mvctx->comps[i].class0[j], VP9_NMV_UPDATE_PROB); } for (j = 0; j < MV_OFFSET_BITS; ++j) { update_nmv(bc, &mvctx->comps[i].bits[j], VP9_NMV_UPDATE_PROB); } } for (i = 0; i < 2; ++i) { for (j = 0; j < CLASS0_SIZE; ++j) { for (k = 0; k < 3; ++k) update_nmv(bc, &mvctx->comps[i].class0_fp[j][k], VP9_NMV_UPDATE_PROB); } for (j = 0; j < 3; ++j) { update_nmv(bc, &mvctx->comps[i].fp[j], VP9_NMV_UPDATE_PROB); } } if (usehp) { for (i = 0; i < 2; ++i) { update_nmv(bc, &mvctx->comps[i].class0_hp, VP9_NMV_UPDATE_PROB); update_nmv(bc, &mvctx->comps[i].hp, VP9_NMV_UPDATE_PROB); } } } // Read the referncence frame static MV_REFERENCE_FRAME read_ref_frame(VP9D_COMP *pbi, vp9_reader *const bc, unsigned char segment_id) { MV_REFERENCE_FRAME ref_frame; int seg_ref_active; int seg_ref_count = 0; VP9_COMMON *const cm = &pbi->common; MACROBLOCKD *const xd = &pbi->mb; seg_ref_active = vp9_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 = vp9_check_segref(xd, segment_id, INTRA_FRAME) + vp9_check_segref(xd, segment_id, LAST_FRAME) + vp9_check_segref(xd, segment_id, GOLDEN_FRAME) + vp9_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; vp9_prob pred_prob; MV_REFERENCE_FRAME pred_ref; // Get the context probability the prediction flag pred_prob = vp9_get_pred_prob(cm, xd, PRED_REF); // Read the prediction status flag prediction_flag = (unsigned char)vp9_read(bc, pred_prob); // Store the prediction flag. vp9_set_pred_flag(xd, PRED_REF, prediction_flag); // Get the predicted reference frame. pred_ref = vp9_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 { vp9_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] *= vp9_check_segref(xd, segment_id, INTRA_FRAME); mod_refprobs[LAST_FRAME] *= vp9_check_segref(xd, segment_id, LAST_FRAME); mod_refprobs[GOLDEN_FRAME] *= (vp9_check_segref(xd, segment_id, GOLDEN_FRAME) * vp9_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) vp9_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 += vp9_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 += vp9_read(bc, mod_refprobs[2]); else { if (seg_ref_active) { if ((pred_ref == GOLDEN_FRAME) || !vp9_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 vp9_set_pred_flag(xd, PRED_REF, 1); ref_frame = vp9_get_pred_ref(cm, xd); } return (MV_REFERENCE_FRAME)ref_frame; } #if CONFIG_SUPERBLOCKS static MB_PREDICTION_MODE read_sb_mv_ref(vp9_reader *bc, const vp9_prob *p) { return (MB_PREDICTION_MODE) treed_read(bc, vp9_sb_mv_ref_tree, p); } #endif static MB_PREDICTION_MODE read_mv_ref(vp9_reader *bc, const vp9_prob *p) { return (MB_PREDICTION_MODE) treed_read(bc, vp9_mv_ref_tree, p); } static B_PREDICTION_MODE sub_mv_ref(vp9_reader *bc, const vp9_prob *p) { return (B_PREDICTION_MODE) treed_read(bc, vp9_sub_mv_ref_tree, p); } #ifdef VPX_MODE_COUNT unsigned int vp9_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 read_switchable_interp_probs(VP9D_COMP* const pbi, BOOL_DECODER* const bc) { VP9_COMMON *const cm = &pbi->common; int i, j; for (j = 0; j <= VP9_SWITCHABLE_FILTERS; ++j) { for (i = 0; i < VP9_SWITCHABLE_FILTERS - 1; ++i) { cm->fc.switchable_interp_prob[j][i] = vp9_read_literal(bc, 8); } } //printf("DECODER: %d %d\n", cm->fc.switchable_interp_prob[0], //cm->fc.switchable_interp_prob[1]); } static void mb_mode_mv_init(VP9D_COMP *pbi, vp9_reader *bc) { VP9_COMMON *const cm = &pbi->common; nmv_context *const nmvc = &pbi->common.fc.nmvc; MACROBLOCKD *const xd = &pbi->mb; if (cm->frame_type == KEY_FRAME) { if (!cm->kf_ymode_probs_update) cm->kf_ymode_probs_index = vp9_read_literal(bc, 3); } else { #if CONFIG_PRED_FILTER cm->pred_filter_mode = (vp9_prob)vp9_read_literal(bc, 2); if (cm->pred_filter_mode == 2) cm->prob_pred_filter_off = (vp9_prob)vp9_read_literal(bc, 8); #endif if (cm->mcomp_filter_type == SWITCHABLE) read_switchable_interp_probs(pbi, bc); // Decode the baseline probabilities for decoding reference frame cm->prob_intra_coded = (vp9_prob)vp9_read_literal(bc, 8); cm->prob_last_coded = (vp9_prob)vp9_read_literal(bc, 8); cm->prob_gf_coded = (vp9_prob)vp9_read_literal(bc, 8); // Computes a modified set of probabilities for use when reference // frame prediction fails. vp9_compute_mod_refprobs(cm); pbi->common.comp_pred_mode = vp9_read(bc, 128); if (cm->comp_pred_mode) cm->comp_pred_mode += vp9_read(bc, 128); if (cm->comp_pred_mode == HYBRID_PREDICTION) { int i; for (i = 0; i < COMP_PRED_CONTEXTS; i++) cm->prob_comppred[i] = (vp9_prob)vp9_read_literal(bc, 8); } if (vp9_read_bit(bc)) { int i = 0; do { cm->fc.ymode_prob[i] = (vp9_prob) vp9_read_literal(bc, 8); } while (++i < VP9_YMODES - 1); } #if CONFIG_NEW_MVREF // Temp defaults probabilities for ecnoding the MV ref id signal vpx_memset(xd->mb_mv_ref_id_probs, 192, sizeof(xd->mb_mv_ref_id_probs)); #endif read_nmvprobs(bc, nmvc, xd->allow_high_precision_mv); } } // 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(VP9D_COMP *pbi, int mb_row, int mb_col, BOOL_DECODER* const bc) { VP9_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 vp9_prob pred_prob = vp9_get_pred_prob(cm, xd, PRED_SEG_ID); // Read the prediction status flag unsigned char seg_pred_flag = (unsigned char)vp9_read(bc, pred_prob); // Store the prediction flag. vp9_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 = vp9_get_pred_mb_segid(cm, xd, index); } // Else .... decode it explicitly else { read_mb_segid(bc, mbmi, xd); } } // Normal unpredicted coding mode else { read_mb_segid(bc, mbmi, xd); } #if CONFIG_SUPERBLOCKS if (mbmi->encoded_as_sb) { cm->last_frame_seg_map[index] = mbmi->segment_id; if (mb_col + 1 < cm->mb_cols) cm->last_frame_seg_map[index + 1] = mbmi->segment_id; if (mb_row + 1 < cm->mb_rows) { cm->last_frame_seg_map[index + cm->mb_cols] = mbmi->segment_id; if (mb_col + 1 < cm->mb_cols) cm->last_frame_seg_map[index + cm->mb_cols + 1] = mbmi->segment_id; } } else #endif { cm->last_frame_seg_map[index] = mbmi->segment_id; } } else { #if CONFIG_SUPERBLOCKS if (mbmi->encoded_as_sb) { mbmi->segment_id = cm->last_frame_seg_map[index]; if (mb_col < cm->mb_cols - 1) mbmi->segment_id = mbmi->segment_id && cm->last_frame_seg_map[index + 1]; if (mb_row < cm->mb_rows - 1) { mbmi->segment_id = mbmi->segment_id && cm->last_frame_seg_map[index + cm->mb_cols]; if (mb_col < cm->mb_cols - 1) mbmi->segment_id = mbmi->segment_id && cm->last_frame_seg_map[index + cm->mb_cols + 1]; } } else #endif { mbmi->segment_id = cm->last_frame_seg_map[index]; } } } else { // The encoder explicitly sets the segment_id to 0 // when segmentation is disabled mbmi->segment_id = 0; } } static void read_mb_modes_mv(VP9D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi, MODE_INFO *prev_mi, int mb_row, int mb_col, BOOL_DECODER* const bc) { VP9_COMMON *const cm = &pbi->common; nmv_context *const nmvc = &pbi->common.fc.nmvc; const int mis = pbi->common.mode_info_stride; MACROBLOCKD *const xd = &pbi->mb; int_mv *const mv = &mbmi->mv[0]; 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; xd->prev_mode_info_context = prev_mi; // Read the macroblock segment id. read_mb_segment_id(pbi, mb_row, mb_col, bc); if (pbi->common.mb_no_coeff_skip && (!vp9_segfeature_active(xd, mbmi->segment_id, SEG_LVL_EOB) || (vp9_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 mbmi->mb_skip_coeff = vp9_read(bc, vp9_get_pred_prob(cm, xd, PRED_MBSKIP)); } else { if (vp9_segfeature_active(xd, mbmi->segment_id, SEG_LVL_EOB) && (vp9_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; vp9_prob mv_ref_p [VP9_MVREFS - 1]; int recon_y_stride, recon_yoffset; int recon_uv_stride, recon_uvoffset; { int ref_fb_idx; MV_REFERENCE_FRAME ref_frame = mbmi->ref_frame; /* Select the appropriate reference frame for this MB */ if (ref_frame == LAST_FRAME) ref_fb_idx = cm->lst_fb_idx; else if (ref_frame == GOLDEN_FRAME) ref_fb_idx = cm->gld_fb_idx; else ref_fb_idx = cm->alt_fb_idx; recon_y_stride = cm->yv12_fb[ref_fb_idx].y_stride ; recon_uv_stride = cm->yv12_fb[ref_fb_idx].uv_stride; recon_yoffset = (mb_row * recon_y_stride * 16) + (mb_col * 16); recon_uvoffset = (mb_row * recon_uv_stride * 8) + (mb_col * 8); xd->pre.y_buffer = cm->yv12_fb[ref_fb_idx].y_buffer + recon_yoffset; xd->pre.u_buffer = cm->yv12_fb[ref_fb_idx].u_buffer + recon_uvoffset; xd->pre.v_buffer = cm->yv12_fb[ref_fb_idx].v_buffer + recon_uvoffset; vp9_find_mv_refs(xd, mi, prev_mi, ref_frame, mbmi->ref_mvs[ref_frame], cm->ref_frame_sign_bias); vp9_find_best_ref_mvs(xd, xd->pre.y_buffer, recon_y_stride, mbmi->ref_mvs[ref_frame], &best_mv, &nearest, &nearby); vp9_mv_ref_probs(&pbi->common, mv_ref_p, mbmi->mb_mode_context[ref_frame]); } // Is the segment level mode feature enabled for this segment if (vp9_segfeature_active(xd, mbmi->segment_id, SEG_LVL_MODE)) { mbmi->mode = vp9_get_segdata(xd, mbmi->segment_id, SEG_LVL_MODE); } else { #if CONFIG_SUPERBLOCKS if (mbmi->encoded_as_sb) { mbmi->mode = read_sb_mv_ref(bc, mv_ref_p); } else #endif mbmi->mode = read_mv_ref(bc, mv_ref_p); vp9_accum_mv_refs(&pbi->common, mbmi->mode, mbmi->mb_mode_context[mbmi->ref_frame]); } #if CONFIG_PRED_FILTER if (mbmi->mode >= NEARESTMV && mbmi->mode < SPLITMV) { // Is the prediction filter enabled if (cm->pred_filter_mode == 2) mbmi->pred_filter_enabled = vp9_read(bc, cm->prob_pred_filter_off); else mbmi->pred_filter_enabled = cm->pred_filter_mode; } #endif if (mbmi->mode >= NEARESTMV && mbmi->mode <= SPLITMV) { if (cm->mcomp_filter_type == SWITCHABLE) { mbmi->interp_filter = vp9_switchable_interp[ treed_read(bc, vp9_switchable_interp_tree, vp9_get_pred_probs(cm, xd, PRED_SWITCHABLE_INTERP))]; } else { mbmi->interp_filter = cm->mcomp_filter_type; } } if (cm->comp_pred_mode == COMP_PREDICTION_ONLY || (cm->comp_pred_mode == HYBRID_PREDICTION && vp9_read(bc, vp9_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; if (mbmi->second_ref_frame) { int second_ref_fb_idx; /* Select the appropriate reference frame for this MB */ if (mbmi->second_ref_frame == LAST_FRAME) second_ref_fb_idx = cm->lst_fb_idx; else if (mbmi->second_ref_frame == GOLDEN_FRAME) second_ref_fb_idx = cm->gld_fb_idx; else second_ref_fb_idx = cm->alt_fb_idx; xd->second_pre.y_buffer = cm->yv12_fb[second_ref_fb_idx].y_buffer + recon_yoffset; xd->second_pre.u_buffer = cm->yv12_fb[second_ref_fb_idx].u_buffer + recon_uvoffset; xd->second_pre.v_buffer = cm->yv12_fb[second_ref_fb_idx].v_buffer + recon_uvoffset; vp9_find_mv_refs(xd, mi, prev_mi, mbmi->second_ref_frame, mbmi->ref_mvs[mbmi->second_ref_frame], cm->ref_frame_sign_bias); vp9_find_best_ref_mvs(xd, xd->second_pre.y_buffer, recon_y_stride, mbmi->ref_mvs[mbmi->second_ref_frame], &best_mv_second, &nearest_second, &nearby_second); } } else { mbmi->second_ref_frame = 0; } mbmi->uv_mode = DC_PRED; switch (mbmi->mode) { case SPLITMV: { const int s = mbmi->partitioning = treed_read(bc, vp9_mbsplit_tree, cm->fc.mbsplit_prob); const int num_p = vp9_mbsplit_count [s]; int j = 0; cm->fc.mbsplit_counts[s]++; 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 = vp9_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 = vp9_mv_cont(&leftmv, &abovemv); blockmode = sub_mv_ref(bc, cm->fc.sub_mv_ref_prob [mv_contz]); cm->fc.sub_mv_ref_counts[mv_contz][blockmode - LEFT4X4]++; switch (blockmode) { case NEW4X4: read_nmv(bc, &blockmv.as_mv, &best_mv.as_mv, nmvc); read_nmv_fp(bc, &blockmv.as_mv, &best_mv.as_mv, nmvc, xd->allow_high_precision_mv); vp9_increment_nmv(&blockmv.as_mv, &best_mv.as_mv, &cm->fc.NMVcount, xd->allow_high_precision_mv); blockmv.as_mv.row += best_mv.as_mv.row; blockmv.as_mv.col += best_mv.as_mv.col; if (mbmi->second_ref_frame) { read_nmv(bc, &secondmv.as_mv, &best_mv_second.as_mv, nmvc); read_nmv_fp(bc, &secondmv.as_mv, &best_mv_second.as_mv, nmvc, xd->allow_high_precision_mv); vp9_increment_nmv(&secondmv.as_mv, &best_mv_second.as_mv, &cm->fc.NMVcount, xd->allow_high_precision_mv); secondmv.as_mv.row += best_mv_second.as_mv.row; secondmv.as_mv.col += best_mv_second.as_mv.col; } #ifdef VPX_MODE_COUNT vp9_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 vp9_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 vp9_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 vp9_mv_cont_count[mv_contz][2]++; #endif break; default: break; } mbmi->need_to_clamp_mvs |= 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 |= 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->mv[1].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 */ 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->mv[1].as_int = nearby_second.as_int; clamp_mv(&mbmi->mv[1], 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 */ 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->mv[1].as_int = nearest_second.as_int; clamp_mv(&mbmi->mv[1], 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->mv[1].as_int = 0; break; case NEWMV: #if CONFIG_NEW_MVREF { int best_index; MV_REFERENCE_FRAME ref_frame = mbmi->ref_frame; // Encode the index of the choice. best_index = vp9_read_mv_ref_id(bc, xd->mb_mv_ref_id_probs[ref_frame]); best_mv.as_int = mbmi->ref_mvs[ref_frame][best_index].as_int; } #endif read_nmv(bc, &mv->as_mv, &best_mv.as_mv, nmvc); read_nmv_fp(bc, &mv->as_mv, &best_mv.as_mv, nmvc, xd->allow_high_precision_mv); vp9_increment_nmv(&mv->as_mv, &best_mv.as_mv, &cm->fc.NMVcount, xd->allow_high_precision_mv); 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 = 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_NEW_MVREF { int best_index; MV_REFERENCE_FRAME ref_frame = mbmi->second_ref_frame; // Encode the index of the choice. best_index = vp9_read_mv_ref_id(bc, xd->mb_mv_ref_id_probs[ref_frame]); best_mv_second.as_int = mbmi->ref_mvs[ref_frame][best_index].as_int; } #endif read_nmv(bc, &mbmi->mv[1].as_mv, &best_mv_second.as_mv, nmvc); read_nmv_fp(bc, &mbmi->mv[1].as_mv, &best_mv_second.as_mv, nmvc, xd->allow_high_precision_mv); vp9_increment_nmv(&mbmi->mv[1].as_mv, &best_mv_second.as_mv, &cm->fc.NMVcount, xd->allow_high_precision_mv); mbmi->mv[1].as_mv.row += best_mv_second.as_mv.row; mbmi->mv[1].as_mv.col += best_mv_second.as_mv.col; mbmi->need_to_clamp_secondmv |= check_mv_bounds(&mbmi->mv[1], 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[0].as_int = 0; if (vp9_segfeature_active(xd, mbmi->segment_id, SEG_LVL_MODE)) mbmi->mode = (MB_PREDICTION_MODE) vp9_get_segdata(xd, mbmi->segment_id, SEG_LVL_MODE); else { // FIXME write using SB mode tree mbmi->mode = (MB_PREDICTION_MODE) read_ymode(bc, pbi->common.fc.ymode_prob); pbi->common.fc.ymode_counts[mbmi->mode]++; } #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 = vp9_read(bc, DEFAULT_COMP_INTRA_PROB); #endif do { int m; m = mi->bmi[j].as_mode.first = (B_PREDICTION_MODE) read_bmode(bc, pbi->common.fc.bmode_prob); #if CONFIG_NEWBINTRAMODES if (m == B_CONTEXT_PRED) m -= CONTEXT_PRED_REPLACEMENTS; #endif pbi->common.fc.bmode_counts[m]++; #if CONFIG_COMP_INTRA_PRED if (use_comp_pred) { mi->bmi[j].as_mode.second = (B_PREDICTION_MODE)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 = vp9_i8x8_block[i]; mode8x8 = read_i8x8_mode(bc, pbi->common.fc.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; pbi->common.fc.i8x8_mode_counts[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 { mbmi->uv_mode = (MB_PREDICTION_MODE)read_uv_mode( bc, pbi->common.fc.uv_mode_prob[mbmi->mode]); pbi->common.fc.uv_mode_counts[mbmi->mode][mbmi->uv_mode]++; } #if CONFIG_COMP_INTRA_PRED mbmi->second_uv_mode = (MB_PREDICTION_MODE)(DC_PRED - 1); #endif } if (cm->txfm_mode == TX_MODE_SELECT && mbmi->mb_skip_coeff == 0 && ((mbmi->ref_frame == INTRA_FRAME && mbmi->mode <= I8X8_PRED) || (mbmi->ref_frame != INTRA_FRAME && !(mbmi->mode == SPLITMV && mbmi->partitioning == PARTITIONING_4X4)))) { // FIXME(rbultje) code ternary symbol once all experiments are merged mbmi->txfm_size = vp9_read(bc, cm->prob_tx[0]); if (mbmi->txfm_size != TX_4X4 && mbmi->mode != I8X8_PRED && mbmi->mode != SPLITMV) mbmi->txfm_size += vp9_read(bc, cm->prob_tx[1]); } else if (cm->txfm_mode >= ALLOW_16X16 && ((mbmi->ref_frame == INTRA_FRAME && mbmi->mode <= TM_PRED) || (mbmi->ref_frame != INTRA_FRAME && mbmi->mode != SPLITMV))) { mbmi->txfm_size = TX_16X16; } else if (cm->txfm_mode >= ALLOW_8X8 && (!(mbmi->ref_frame == INTRA_FRAME && mbmi->mode == B_PRED) && !(mbmi->ref_frame != INTRA_FRAME && mbmi->mode == SPLITMV && mbmi->partitioning == PARTITIONING_4X4))) { mbmi->txfm_size = TX_8X8; } else { mbmi->txfm_size = TX_4X4; } } void vp9_decode_mode_mvs_init(VP9D_COMP* const pbi, BOOL_DECODER* const bc) { VP9_COMMON *cm = &pbi->common; vpx_memset(cm->mbskip_pred_probs, 0, sizeof(cm->mbskip_pred_probs)); if (pbi->common.mb_no_coeff_skip) { int k; for (k = 0; k < MBSKIP_CONTEXTS; ++k) cm->mbskip_pred_probs[k] = (vp9_prob)vp9_read_literal(bc, 8); } mb_mode_mv_init(pbi, bc); } void vp9_decode_mb_mode_mv(VP9D_COMP* const pbi, MACROBLOCKD* const xd, int mb_row, int mb_col, BOOL_DECODER* const bc) { MODE_INFO *mi = xd->mode_info_context; MODE_INFO *prev_mi = xd->prev_mode_info_context; if (pbi->common.frame_type == KEY_FRAME) kfread_modes(pbi, mi, mb_row, mb_col, bc); else read_mb_modes_mv(pbi, mi, &mi->mbmi, prev_mi, mb_row, mb_col, bc); }