/* * 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" //#if CONFIG_SEGFEATURES #include "vp8/common/seg_common.h" #if CONFIG_SEGMENTATION #include "vp8/common/seg_common.h" #endif #if CONFIG_DEBUG #include #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; } #if CONFIG_I8X8 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; } #endif 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; } static void vp8_read_mb_features(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_reader *const bc = & pbi->bc; const int mis = pbi->common.mode_info_stride; { MB_PREDICTION_MODE y_mode; /* Read the Macroblock segmentation map if it is being updated explicitly this frame (reset to 0 above by default) * By default on a key frame reset all MBs to segment 0 */ m->mbmi.segment_id = 0; if (pbi->mb.update_mb_segmentation_map) vp8_read_mb_features(bc, &m->mbmi, &pbi->mb); //#if CONFIG_SEGFEATURES 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 ) ) ) { m->mbmi.mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false); } else { //#if CONFIG_SEGFEATURES 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 m->mbmi.ref_frame = INTRA_FRAME; if ((m->mbmi.mode = y_mode) == B_PRED) { int i = 0; 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 = (B_PREDICTION_MODE) vp8_read_bmode(bc, pbi->common.kf_bmode_prob [A] [L]); } while (++i < 16); } #if CONFIG_I8X8 if((m->mbmi.mode = y_mode) == I8X8_PRED) { int i; int mode8x8; //printf("F%3d:%d:%d:", pbi->common.current_video_frame, mb_row, mb_col); 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= mode8x8; m->bmi[ib+1].as_mode= mode8x8; m->bmi[ib+4].as_mode= mode8x8; m->bmi[ib+5].as_mode= mode8x8; } //printf("%2d%2d%2d%2d\n", m->bmi[0].as_mode,m->bmi[2].as_mode, // m->bmi[8].as_mode,m->bmi[10].as_mode); } else #endif #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 } } 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 < 3); i = mvlong_width - 1; /* Skip bit 3, which is sometimes implicit */ do { x += vp8_read(r, p [MVPbits + i]) << i; } while (--i > 3); if (!(x & 0xFFF0) || vp8_read(r, p [MVPbits + 3])) x += 8; } 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); } 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); } // 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; //#if CONFIG_SEGFEATURES MACROBLOCKD *const xd = &pbi->mb; seg_ref_active = segfeature_active( xd, segment_id, SEG_LVL_REF_FRAME ); // Segment reference frame features not available if ( !seg_ref_active ) { ref_frame = (MV_REFERENCE_FRAME) vp8_read(bc, pbi->prob_intra); if (ref_frame) { if (vp8_read(bc, pbi->prob_last)) { ref_frame = (MV_REFERENCE_FRAME)((int)ref_frame + (int)(1 + vp8_read(bc, pbi->prob_gf))); } } } //#if CONFIG_SEGFEATURES // Segment reference frame features are enabled else { // If there are no inter reference frames enabled we can set INTRA if ( !check_segref_inter(xd, segment_id) ) { ref_frame = INTRA_FRAME; } else { // Else if there are both intra and inter options we need to read // the inter / intra flag, else mark as inter. if ( check_segref( xd, segment_id, INTRA_FRAME ) ) ref_frame = (MV_REFERENCE_FRAME) vp8_read(bc, pbi->prob_intra); else ref_frame = LAST_FRAME; if ( ref_frame == LAST_FRAME ) { // Now consider last vs (golden or alt) flag.... // If Last is not enabled if ( !check_segref( xd, segment_id, LAST_FRAME ) ) { // If not golden then it must be altref if (!check_segref( xd, segment_id, GOLDEN_FRAME )) { ref_frame = ALTREF_FRAME; } // Not Altref therefore must be Golden else if (!check_segref( xd, segment_id, ALTREF_FRAME )) { ref_frame = GOLDEN_FRAME; } // Else we must read bit to decide. else { ref_frame = (MV_REFERENCE_FRAME)((int)ref_frame + (int)(1 + vp8_read(bc, pbi->prob_gf))); } } // Both last and at least one of alt or golden are enabled else if ( check_segref( xd, segment_id, GOLDEN_FRAME ) || check_segref( xd, segment_id, ALTREF_FRAME ) ) { // Read flag to indicate (golden or altref) vs last if (vp8_read(bc, pbi->prob_last)) { // If not golden then it must be altref if (!check_segref( xd, segment_id, GOLDEN_FRAME )) { ref_frame = ALTREF_FRAME; } // Not Altref therefore must be Golden else if (!check_segref( xd, segment_id, ALTREF_FRAME )) { ref_frame = GOLDEN_FRAME; } else { ref_frame = (MV_REFERENCE_FRAME)((int)ref_frame + (int)(1 + vp8_read(bc, pbi->prob_gf))); } } // ELSE LAST } } } } 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_reader *const bc = & pbi->bc; MV_CONTEXT *const mvc = pbi->common.fc.mvc; #if CONFIG_SEGMENTATION MACROBLOCKD *const xd = & pbi->mb; #endif #if CONFIG_ERROR_CONCEALMENT /* Default is that no macroblock is corrupt, therefore we initialize * mvs_corrupt_from_mb to something very big, which we can be sure is * outside the frame. */ pbi->mvs_corrupt_from_mb = UINT_MAX; #endif pbi->prob_skip_false = 0; if (pbi->common.mb_no_coeff_skip) pbi->prob_skip_false = (vp8_prob)vp8_read_literal(bc, 8); if(pbi->common.frame_type != KEY_FRAME) { pbi->prob_intra = (vp8_prob)vp8_read_literal(bc, 8); pbi->prob_last = (vp8_prob)vp8_read_literal(bc, 8); pbi->prob_gf = (vp8_prob)vp8_read_literal(bc, 8); if (vp8_read_bit(bc)) { int i = 0; do { pbi->common.fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8); } while (++i < 4); } if (vp8_read_bit(bc)) { int i = 0; do { pbi->common.fc.uv_mode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8); } while (++i < 3); } read_mvcontexts(bc, mvc); #if CONFIG_SEGMENTATION xd->temporal_update = vp8_read_bit(bc); #endif } } static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi, int mb_row, int mb_col) { vp8_reader *const bc = & pbi->bc; MV_CONTEXT *const mvc = pbi->common.fc.mvc; const int mis = pbi->common.mode_info_stride; MACROBLOCKD *const xd = & pbi->mb; #if CONFIG_SEGMENTATION int sum; int index = mb_row * pbi->common.mb_cols + mb_col; #endif 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; /* 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; /* If required read in new segmentation data for this MB */ if (xd->update_mb_segmentation_map) { #if CONFIG_SEGMENTATION if (xd->temporal_update) { sum = 0; if (mb_col != 0) sum += (mi-1)->mbmi.segment_flag; if (mb_row != 0) sum += (mi-pbi->common.mb_cols)->mbmi.segment_flag; if (vp8_read(bc, xd->mb_segment_tree_probs[3+sum]) == 0) { mbmi->segment_id = pbi->segmentation_map[index]; mbmi->segment_flag = 0; } else { vp8_read_mb_features(bc, &mi->mbmi, xd); mbmi->segment_flag = 1; pbi->segmentation_map[index] = mbmi->segment_id; } } else { vp8_read_mb_features(bc, &mi->mbmi, xd); pbi->segmentation_map[index] = mbmi->segment_id; } index++; #else vp8_read_mb_features(bc, &mi->mbmi, xd); #endif } //#if CONFIG_SEGFEATURES 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 mbmi->mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false); } else { //#if CONFIG_SEGFEATURES 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, &nearest, &nearby, &best_mv, rct, mbmi->ref_frame, pbi->common.ref_frame_sign_bias); vp8_mv_ref_probs(mv_ref_p, rct); //#if CONFIG_SEGFEATURES // 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); } 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; 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: 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: 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 CONFIG_ERROR_CONCEALMENT if(pbi->ec_enabled) { mi->bmi[ 0].mv.as_int = mi->bmi[ 1].mv.as_int = mi->bmi[ 2].mv.as_int = mi->bmi[ 3].mv.as_int = mi->bmi[ 4].mv.as_int = mi->bmi[ 5].mv.as_int = mi->bmi[ 6].mv.as_int = mi->bmi[ 7].mv.as_int = mi->bmi[ 8].mv.as_int = mi->bmi[ 9].mv.as_int = mi->bmi[10].mv.as_int = mi->bmi[11].mv.as_int = mi->bmi[12].mv.as_int = mi->bmi[13].mv.as_int = mi->bmi[14].mv.as_int = mi->bmi[15].mv.as_int = mv->as_int; } #endif break; default:; #if CONFIG_DEBUG assert(0); #endif } } else { /* required for left and above block mv */ mbmi->mv.as_int = 0; //#if CONFIG_SEGFEATURES 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 MB mode is BPRED read the block modes if (mbmi->mode == B_PRED) { int j = 0; do { mi->bmi[j].as_mode = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob); } while (++j < 16); } mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, pbi->common.fc.uv_mode_prob); } } void vp8_decode_mode_mvs(VP8D_COMP *pbi) { MODE_INFO *mi = pbi->common.mi; int mb_row = -1; //#if CONFIG_SEGFEATURES #if 0 FILE *statsfile; statsfile = fopen("decsegmap.stt", "a"); fprintf(statsfile, "\n" ); #endif mb_mode_mv_init(pbi); #if CONFIG_QIMODE if(pbi->common.frame_type==KEY_FRAME && !pbi->common.kf_ymode_probs_update) { pbi->common.kf_ymode_probs_index = vp8_read_literal(&pbi->bc, 3); } #endif while (++mb_row < pbi->common.mb_rows) { int mb_col = -1; int mb_to_top_edge; int mb_to_bottom_edge; 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 CONFIG_SEGFEATURES #if 0 fprintf(statsfile, "\n" ); #endif while (++mb_col < pbi->common.mb_cols) { #if CONFIG_ERROR_CONCEALMENT int mb_num = mb_row * pbi->common.mb_cols + mb_col; #endif /*read_mb_modes_mv(pbi, xd->mode_info_context, &xd->mode_info_context->mbmi, mb_row, mb_col);*/ if(pbi->common.frame_type == KEY_FRAME) vp8_kfread_modes(pbi, mi, mb_row, mb_col); else read_mb_modes_mv(pbi, mi, &mi->mbmi, mb_row, mb_col); //printf("%3d", mi->mbmi.mode); /* if(pbi->common.current_video_frame==7) { FILE *fmode=fopen("kfmode.txt", "a"); fprintf(fmode, "%3d:%3d:%d\n",mb_row, mb_col, mi->mbmi.mode); fclose(fmode); }*/ /* if(mi->mbmi.mode==I8X8_PRED) { printf("F%3d:%d:%d\n", pbi->common.current_video_frame, mb_row, mb_col); } */ #if CONFIG_ERROR_CONCEALMENT /* look for corruption. set mvs_corrupt_from_mb to the current * mb_num if the frame is corrupt from this macroblock. */ if (vp8dx_bool_error(&pbi->bc) && mb_num < pbi->mvs_corrupt_from_mb) { pbi->mvs_corrupt_from_mb = mb_num; /* no need to continue since the partition is corrupt from * here on. */ return; } #endif //#if CONFIG_SEGFEATURES #if 0 fprintf(statsfile, "%2d%2d%2d ", mi->mbmi.segment_id, mi->mbmi.ref_frame, mi->mbmi.mode ); #endif mi++; /* next macroblock */ } // printf("\n"); mi++; /* skip left predictor each row */ } //#if CONFIG_SEGFEATURES #if 0 fclose(statsfile); #endif }