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1 943f69a6 Michael Niedermayer
/*
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 * H.26L/H.264/AVC/JVT/14496-10/... direct mb/block decoding
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 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file libavcodec/h264_direct.c
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 * H.264 / AVC / MPEG4 part10 direct mb/block decoding.
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 * @author Michael Niedermayer <michaelni@gmx.at>
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 */
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#include "internal.h"
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#include "dsputil.h"
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#include "avcodec.h"
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#include "mpegvideo.h"
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#include "h264.h"
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#include "rectangle.h"
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#if ARCH_X86
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#include "x86/h264_i386.h"
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#endif
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//#undef NDEBUG
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#include <assert.h>
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static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
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    int poc0 = h->ref_list[0][i].poc;
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    int td = av_clip(poc1 - poc0, -128, 127);
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    if(td == 0 || h->ref_list[0][i].long_ref){
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        return 256;
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    }else{
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        int tb = av_clip(poc - poc0, -128, 127);
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        int tx = (16384 + (FFABS(td) >> 1)) / td;
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        return av_clip((tb*tx + 32) >> 6, -1024, 1023);
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    }
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}
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void ff_h264_direct_dist_scale_factor(H264Context * const h){
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    MpegEncContext * const s = &h->s;
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    const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
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    const int poc1 = h->ref_list[1][0].poc;
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    int i, field;
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    for(field=0; field<2; field++){
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        const int poc  = h->s.current_picture_ptr->field_poc[field];
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        const int poc1 = h->ref_list[1][0].field_poc[field];
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        for(i=0; i < 2*h->ref_count[0]; i++)
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            h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
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    }
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    for(i=0; i<h->ref_count[0]; i++){
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        h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
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    }
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}
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static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
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    MpegEncContext * const s = &h->s;
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    Picture * const ref1 = &h->ref_list[1][0];
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    int j, old_ref, rfield;
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    int start= mbafi ? 16                      : 0;
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    int end  = mbafi ? 16+2*h->ref_count[list] : h->ref_count[list];
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    int interl= mbafi || s->picture_structure != PICT_FRAME;
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    /* bogus; fills in for missing frames */
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    memset(map[list], 0, sizeof(map[list]));
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    for(rfield=0; rfield<2; rfield++){
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        for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
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            int poc = ref1->ref_poc[colfield][list][old_ref];
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            if     (!interl)
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                poc |= 3;
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            else if( interl && (poc&3) == 3) //FIXME store all MBAFF references so this isnt needed
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                poc= (poc&~3) + rfield + 1;
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            for(j=start; j<end; j++){
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                if(4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3) == poc){
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                    int cur_ref= mbafi ? (j-16)^field : j;
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                    map[list][2*old_ref + (rfield^field) + 16] = cur_ref;
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                    if(rfield == field)
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                        map[list][old_ref] = cur_ref;
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                    break;
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                }
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            }
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        }
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    }
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}
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void ff_h264_direct_ref_list_init(H264Context * const h){
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    MpegEncContext * const s = &h->s;
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    Picture * const ref1 = &h->ref_list[1][0];
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    Picture * const cur = s->current_picture_ptr;
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    int list, j, field;
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    int sidx= (s->picture_structure&1)^1;
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    int ref1sidx= (ref1->reference&1)^1;
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    for(list=0; list<2; list++){
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        cur->ref_count[sidx][list] = h->ref_count[list];
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        for(j=0; j<h->ref_count[list]; j++)
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            cur->ref_poc[sidx][list][j] = 4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3);
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    }
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    if(s->picture_structure == PICT_FRAME){
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        memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
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        memcpy(cur->ref_poc  [1], cur->ref_poc  [0], sizeof(cur->ref_poc  [0]));
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    }
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    cur->mbaff= FRAME_MBAFF;
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    if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
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        return;
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    for(list=0; list<2; list++){
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        fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
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        for(field=0; field<2; field++)
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            fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
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    }
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}
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void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type){
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    MpegEncContext * const s = &h->s;
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    int b8_stride = h->b8_stride;
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    int b4_stride = h->b_stride;
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    int mb_xy = h->mb_xy;
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    int mb_type_col[2];
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    const int16_t (*l1mv0)[2], (*l1mv1)[2];
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    const int8_t *l1ref0, *l1ref1;
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    const int is_b8x8 = IS_8X8(*mb_type);
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    unsigned int sub_mb_type;
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    int i8, i4;
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    assert(h->ref_list[1][0].reference&3);
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#define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
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    if(IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])){ // AFL/AFR/FR/FL -> AFL/FL
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        if(!IS_INTERLACED(*mb_type)){                    //     AFR/FR    -> AFL/FL
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            int cur_poc = s->current_picture_ptr->poc;
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            int *col_poc = h->ref_list[1]->field_poc;
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            int col_parity = FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc);
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            mb_xy= s->mb_x + ((s->mb_y&~1) + col_parity)*s->mb_stride;
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            b8_stride = 0;
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        }else if(!(s->picture_structure & h->ref_list[1][0].reference) && !h->ref_list[1][0].mbaff){// FL -> FL & differ parity
160
            int fieldoff= 2*(h->ref_list[1][0].reference)-3;
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            mb_xy += s->mb_stride*fieldoff;
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        }
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        goto single_col;
164
    }else{                                               // AFL/AFR/FR/FL -> AFR/FR
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        if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
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            mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
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            mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
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            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + s->mb_stride];
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            b8_stride *= 3;
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            b4_stride *= 6;
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            //FIXME IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag
172
            if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
173
                && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
174
                && !is_b8x8){
175
                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
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                *mb_type   |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
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            }else{
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                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
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                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
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            }
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        }else{                                           //     AFR/FR    -> AFR/FR
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single_col:
183
            mb_type_col[0] =
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            mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
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            if(IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag){
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                /* FIXME save sub mb types from previous frames (or derive from MVs)
187
                * so we know exactly what block size to use */
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                sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
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                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
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            }else if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
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                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
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                *mb_type   |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
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            }else{
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                sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
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                *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
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            }
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        }
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    }
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200
    l1mv0  = &h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
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    l1mv1  = &h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
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    l1ref0 = &h->ref_list[1][0].ref_index [0][h->mb2b8_xy[mb_xy]];
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    l1ref1 = &h->ref_list[1][0].ref_index [1][h->mb2b8_xy[mb_xy]];
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    if(!b8_stride){
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        if(s->mb_y&1){
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            l1ref0 += h->b8_stride;
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            l1ref1 += h->b8_stride;
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            l1mv0  +=  2*b4_stride;
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            l1mv1  +=  2*b4_stride;
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        }
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    }
212
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    if(h->direct_spatial_mv_pred){
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        int ref[2];
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        int mv[2][2];
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        int list;
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        /* FIXME interlacing + spatial direct uses wrong colocated block positions */
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        /* ref = min(neighbors) */
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        for(list=0; list<2; list++){
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            int refa = h->ref_cache[list][scan8[0] - 1];
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            int refb = h->ref_cache[list][scan8[0] - 8];
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            int refc = h->ref_cache[list][scan8[0] - 8 + 4];
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            if(refc == PART_NOT_AVAILABLE)
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                refc = h->ref_cache[list][scan8[0] - 8 - 1];
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            ref[list] = FFMIN3((unsigned)refa, (unsigned)refb, (unsigned)refc);
228
            if(ref[list] < 0)
229
                ref[list] = -1;
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        }
231
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        if(ref[0] < 0 && ref[1] < 0){
233
            ref[0] = ref[1] = 0;
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            mv[0][0] = mv[0][1] =
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            mv[1][0] = mv[1][1] = 0;
236
        }else{
237
            for(list=0; list<2; list++){
238
                if(ref[list] >= 0)
239
                    pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
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                else
241
                    mv[list][0] = mv[list][1] = 0;
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            }
243
        }
244
245
        if(ref[1] < 0){
246
            if(!is_b8x8)
247
                *mb_type &= ~MB_TYPE_L1;
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            sub_mb_type &= ~MB_TYPE_L1;
249
        }else if(ref[0] < 0){
250
            if(!is_b8x8)
251
                *mb_type &= ~MB_TYPE_L0;
252
            sub_mb_type &= ~MB_TYPE_L0;
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        }
254
255
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
256
            for(i8=0; i8<4; i8++){
257
                int x8 = i8&1;
258
                int y8 = i8>>1;
259
                int xy8 = x8+y8*b8_stride;
260
                int xy4 = 3*x8+y8*b4_stride;
261
                int a=0, b=0;
262
263
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
264
                    continue;
265
                h->sub_mb_type[i8] = sub_mb_type;
266
267
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
268
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
269
                if(!IS_INTRA(mb_type_col[y8])
270
                   && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
271
                       || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
272
                    if(ref[0] > 0)
273
                        a= pack16to32(mv[0][0],mv[0][1]);
274
                    if(ref[1] > 0)
275
                        b= pack16to32(mv[1][0],mv[1][1]);
276
                }else{
277
                    a= pack16to32(mv[0][0],mv[0][1]);
278
                    b= pack16to32(mv[1][0],mv[1][1]);
279
                }
280
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
281
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
282
            }
283
        }else if(IS_16X16(*mb_type)){
284
            int a=0, b=0;
285
286
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
287
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
288
            if(!IS_INTRA(mb_type_col[0])
289
               && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
290
                   || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
291
                       && (h->x264_build>33 || !h->x264_build)))){
292
                if(ref[0] > 0)
293
                    a= pack16to32(mv[0][0],mv[0][1]);
294
                if(ref[1] > 0)
295
                    b= pack16to32(mv[1][0],mv[1][1]);
296
            }else{
297
                a= pack16to32(mv[0][0],mv[0][1]);
298
                b= pack16to32(mv[1][0],mv[1][1]);
299
            }
300
            fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
301
            fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
302
        }else{
303
            for(i8=0; i8<4; i8++){
304
                const int x8 = i8&1;
305
                const int y8 = i8>>1;
306
307
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
308
                    continue;
309
                h->sub_mb_type[i8] = sub_mb_type;
310
311
                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
312
                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
313
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
314
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
315
316
                /* col_zero_flag */
317
                if(!IS_INTRA(mb_type_col[0]) && (   l1ref0[x8 + y8*b8_stride] == 0
318
                                              || (l1ref0[x8 + y8*b8_stride] < 0 && l1ref1[x8 + y8*b8_stride] == 0
319
                                                  && (h->x264_build>33 || !h->x264_build)))){
320
                    const int16_t (*l1mv)[2]= l1ref0[x8 + y8*b8_stride] == 0 ? l1mv0 : l1mv1;
321
                    if(IS_SUB_8X8(sub_mb_type)){
322
                        const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
323
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
324
                            if(ref[0] == 0)
325
                                fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
326
                            if(ref[1] == 0)
327
                                fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
328
                        }
329
                    }else
330
                    for(i4=0; i4<4; i4++){
331
                        const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
332
                        if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
333
                            if(ref[0] == 0)
334
                                *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
335
                            if(ref[1] == 0)
336
                                *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
337
                        }
338
                    }
339
                }
340
            }
341
        }
342
    }else{ /* direct temporal mv pred */
343
        const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
344
        const int *dist_scale_factor = h->dist_scale_factor;
345
        int ref_offset= 0;
346
347
        if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
348
            map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
349
            map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
350
            dist_scale_factor   =h->dist_scale_factor_field[s->mb_y&1];
351
        }
352
        if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0]))
353
            ref_offset += 16;
354
355
        if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
356
            /* FIXME assumes direct_8x8_inference == 1 */
357
            int y_shift  = 2*!IS_INTERLACED(*mb_type);
358
359
            for(i8=0; i8<4; i8++){
360
                const int x8 = i8&1;
361
                const int y8 = i8>>1;
362
                int ref0, scale;
363
                const int16_t (*l1mv)[2]= l1mv0;
364
365
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
366
                    continue;
367
                h->sub_mb_type[i8] = sub_mb_type;
368
369
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
370
                if(IS_INTRA(mb_type_col[y8])){
371
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
372
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
373
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
374
                    continue;
375
                }
376
377
                ref0 = l1ref0[x8 + y8*b8_stride];
378
                if(ref0 >= 0)
379
                    ref0 = map_col_to_list0[0][ref0 + ref_offset];
380
                else{
381
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
382
                    l1mv= l1mv1;
383
                }
384
                scale = dist_scale_factor[ref0];
385
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
386
387
                {
388
                    const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
389
                    int my_col = (mv_col[1]<<y_shift)/2;
390
                    int mx = (scale * mv_col[0] + 128) >> 8;
391
                    int my = (scale * my_col + 128) >> 8;
392
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
393
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
394
                }
395
            }
396
            return;
397
        }
398
399
        /* one-to-one mv scaling */
400
401
        if(IS_16X16(*mb_type)){
402
            int ref, mv0, mv1;
403
404
            fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
405
            if(IS_INTRA(mb_type_col[0])){
406
                ref=mv0=mv1=0;
407
            }else{
408
                const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
409
                                                : map_col_to_list0[1][l1ref1[0] + ref_offset];
410
                const int scale = dist_scale_factor[ref0];
411
                const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
412
                int mv_l0[2];
413
                mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
414
                mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
415
                ref= ref0;
416
                mv0= pack16to32(mv_l0[0],mv_l0[1]);
417
                mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
418
            }
419
            fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
420
            fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
421
            fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
422
        }else{
423
            for(i8=0; i8<4; i8++){
424
                const int x8 = i8&1;
425
                const int y8 = i8>>1;
426
                int ref0, scale;
427
                const int16_t (*l1mv)[2]= l1mv0;
428
429
                if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
430
                    continue;
431
                h->sub_mb_type[i8] = sub_mb_type;
432
                fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
433
                if(IS_INTRA(mb_type_col[0])){
434
                    fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
435
                    fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
436
                    fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
437
                    continue;
438
                }
439
440
                ref0 = l1ref0[x8 + y8*b8_stride] + ref_offset;
441
                if(ref0 >= 0)
442
                    ref0 = map_col_to_list0[0][ref0];
443
                else{
444
                    ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
445
                    l1mv= l1mv1;
446
                }
447
                scale = dist_scale_factor[ref0];
448
449
                fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
450
                if(IS_SUB_8X8(sub_mb_type)){
451
                    const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
452
                    int mx = (scale * mv_col[0] + 128) >> 8;
453
                    int my = (scale * mv_col[1] + 128) >> 8;
454
                    fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
455
                    fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
456
                }else
457
                for(i4=0; i4<4; i4++){
458
                    const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
459
                    int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
460
                    mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
461
                    mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
462
                    *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
463
                        pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
464
                }
465
            }
466
        }
467
    }
468
}