libavcodec/h264_loopfilter.c:547: error: Uninitialized Value
  The value read from bS[_] was never initialized.

libavcodec/h264_loopfilter.c:547:16: 
545.             // Do not use s->qscale as luma quantizer because it has not the same
546.             // value in IPCM macroblocks.
547.             if(bS[0]+bS[1]+bS[2]+bS[3]){
                    ^
548.                 qp = ( s->current_picture.qscale_table[mb_xy] + s->current_picture.qscale_table[mbm_xy] + 1 ) >> 1;
549.                 //tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d, QPc:%d, QPcn:%d\n", mb_x, mb_y, dir, edge, qp, h->chroma_qp[0], s->current_picture.qscale_table[mbn_xy]);

static av_always_inline void filter_mb_dir(H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize, int mb_xy, int mb_type, int mvy_limit, int first_vertical_edge_done, int dir) {
    MpegEncContext * const s = &h->s;
    int edge;
    const int mbm_xy = dir == 0 ? mb_xy -1 : h->top_mb_xy;
    const int mbm_type = dir == 0 ? h->left_type[0] : h->top_type;
    static const uint8_t mask_edge_tab[2][8]={{0,3,3,3,1,1,1,1},
                                              {0,3,1,1,3,3,3,3}};
    const int mask_edge = mask_edge_tab[dir][(mb_type>>3)&7];
    const int edges = mask_edge== 3 && !(h->cbp&15) ? 1 : 4;
    const int mask_par0 = mb_type & (MB_TYPE_16x16 | (MB_TYPE_8x16 >> dir));
    if(mbm_type && !first_vertical_edge_done){
        if (FRAME_MBAFF && (dir == 1) && ((mb_y&1) == 0)
            && IS_INTERLACED(mbm_type&~mb_type)
            ) {
            unsigned int tmp_linesize   = 2 *   linesize;
            unsigned int tmp_uvlinesize = 2 * uvlinesize;
            int mbn_xy = mb_xy - 2 * s->mb_stride;
            int j;
            for(j=0; j<2; j++, mbn_xy += s->mb_stride){
                DECLARE_ALIGNED_8(int16_t, bS)[4];
                int qp;
                if( IS_INTRA(mb_type|s->current_picture.mb_type[mbn_xy]) ) {
                    *(uint64_t*)bS= 0x0003000300030003ULL;
                } else {
                    const uint8_t *mbn_nnz = h->non_zero_count[mbn_xy] + 4+3*8;
                    int i;
                    for( i = 0; i < 4; i++ ) {
                        bS[i] = 1 + !!(h->non_zero_count_cache[scan8[0]+i] | mbn_nnz[i]);
                    }
                }
                qp = ( s->current_picture.qscale_table[mb_xy] + s->current_picture.qscale_table[mbn_xy] + 1 ) >> 1;
                tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, tmp_linesize, tmp_uvlinesize);
                { int i; for (i = 0; i < 4; i++) tprintf(s->avctx, " bS[%d]:%d", i, bS[i]); tprintf(s->avctx, "\n"); }
                filter_mb_edgeh( &img_y[j*linesize], tmp_linesize, bS, qp, h );
                filter_mb_edgech( &img_cb[j*uvlinesize], tmp_uvlinesize, bS,
                                ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1, h);
                filter_mb_edgech( &img_cr[j*uvlinesize], tmp_uvlinesize, bS,
                                ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1, h);
            }
        }else{
            DECLARE_ALIGNED_8(int16_t, bS)[4];
            int qp;
            if( IS_INTRA(mb_type|mbm_type)) {
                *(uint64_t*)bS= 0x0003000300030003ULL;
                if (   (!IS_INTERLACED(mb_type|mbm_type))
                    || ((FRAME_MBAFF || (s->picture_structure != PICT_FRAME)) && (dir == 0))
                )
                    *(uint64_t*)bS= 0x0004000400040004ULL;
            } else {
                int i, l;
                int mv_done;
                if( dir && FRAME_MBAFF && IS_INTERLACED(mb_type ^ mbm_type)) {
                    *(uint64_t*)bS= 0x0001000100010001ULL;
                    mv_done = 1;
                }
                else if( mask_par0 && ((mbm_type & (MB_TYPE_16x16 | (MB_TYPE_8x16 >> dir)))) ) {
                    int b_idx= 8 + 4;
                    int bn_idx= b_idx - (dir ? 8:1);
                    bS[0] = bS[1] = bS[2] = bS[3] = check_mv(h, 8 + 4, bn_idx, mvy_limit);
                    mv_done = 1;
                }
                else
                    mv_done = 0;
                for( i = 0; i < 4; i++ ) {
                    int x = dir == 0 ? 0 : i;
                    int y = dir == 0 ? i    : 0;
                    int b_idx= 8 + 4 + x + 8*y;
                    int bn_idx= b_idx - (dir ? 8:1);
                    if( h->non_zero_count_cache[b_idx] |
                        h->non_zero_count_cache[bn_idx] ) {
                        bS[i] = 2;
                    }
                    else if(!mv_done)
                    {
                        bS[i] = check_mv(h, b_idx, bn_idx, mvy_limit);
                    }
                }
            }
            if(bS[0]+bS[1]+bS[2]+bS[3]){
                qp = ( s->current_picture.qscale_table[mb_xy] + s->current_picture.qscale_table[mbm_xy] + 1 ) >> 1;
                tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, linesize, uvlinesize);
                if( dir == 0 ) {
                    filter_mb_edgev( &img_y[0], linesize, bS, qp, h );
                    {
                        int qp= ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;
                        filter_mb_edgecv( &img_cb[0], uvlinesize, bS, qp, h);
                        if(h->pps.chroma_qp_diff)
                            qp= ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;
                        filter_mb_edgecv( &img_cr[0], uvlinesize, bS, qp, h);
                    }
                } else {
                    filter_mb_edgeh( &img_y[0], linesize, bS, qp, h );
                    {
                        int qp= ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;
                        filter_mb_edgech( &img_cb[0], uvlinesize, bS, qp, h);
                        if(h->pps.chroma_qp_diff)
                            qp= ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;
                        filter_mb_edgech( &img_cr[0], uvlinesize, bS, qp, h);
                    }
                }
            }
        }
    }
    for( edge = 1; edge < edges; edge++ ) {
        DECLARE_ALIGNED_8(int16_t, bS)[4];
        int qp;
        if( IS_8x8DCT(mb_type & (edge<<24)) )
            continue;
        if( IS_INTRA(mb_type)) {
            *(uint64_t*)bS= 0x0003000300030003ULL;
        } else {
            int i, l;
            int mv_done;
            if( edge & mask_edge ) {
                *(uint64_t*)bS= 0;
                mv_done = 1;
            }
            else if( mask_par0 ) {
                int b_idx= 8 + 4 + edge * (dir ? 8:1);
                int bn_idx= b_idx - (dir ? 8:1);
                bS[0] = bS[1] = bS[2] = bS[3] = check_mv(h, b_idx, bn_idx, mvy_limit);
                mv_done = 1;
            }
            else
                mv_done = 0;
            for( i = 0; i < 4; i++ ) {
                int x = dir == 0 ? edge : i;
                int y = dir == 0 ? i    : edge;
                int b_idx= 8 + 4 + x + 8*y;
                int bn_idx= b_idx - (dir ? 8:1);
                if( h->non_zero_count_cache[b_idx] |
                    h->non_zero_count_cache[bn_idx] ) {
                    bS[i] = 2;
                }
                else if(!mv_done)
                {
                    bS[i] = check_mv(h, b_idx, bn_idx, mvy_limit);
                }
            }
            if(bS[0]+bS[1]+bS[2]+bS[3] == 0)
                continue;
        }
        qp = s->current_picture.qscale_table[mb_xy];
        tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, linesize, uvlinesize);
        if( dir == 0 ) {
            filter_mb_edgev( &img_y[4*edge], linesize, bS, qp, h );
            if( (edge&1) == 0 ) {
                filter_mb_edgecv( &img_cb[2*edge], uvlinesize, bS, h->chroma_qp[0], h);
                filter_mb_edgecv( &img_cr[2*edge], uvlinesize, bS, h->chroma_qp[1], h);
            }
        } else {
            filter_mb_edgeh( &img_y[4*edge*linesize], linesize, bS, qp, h );
            if( (edge&1) == 0 ) {
                filter_mb_edgech( &img_cb[2*edge*uvlinesize], uvlinesize, bS, h->chroma_qp[0], h);
                filter_mb_edgech( &img_cr[2*edge*uvlinesize], uvlinesize, bS, h->chroma_qp[1], h);
            }
        }
    }
}
['static av_always_inline void filter_mb_dir(H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize, int mb_xy, int mb_type, int mvy_limit, int first_vertical_edge_done, int dir) {\n    MpegEncContext * const s = &h->s;\n    int edge;\n    const int mbm_xy = dir == 0 ? mb_xy -1 : h->top_mb_xy;\n    const int mbm_type = dir == 0 ? h->left_type[0] : h->top_type;\n    static const uint8_t mask_edge_tab[2][8]={{0,3,3,3,1,1,1,1},\n                                              {0,3,1,1,3,3,3,3}};\n    const int mask_edge = mask_edge_tab[dir][(mb_type>>3)&7];\n    const int edges = mask_edge== 3 && !(h->cbp&15) ? 1 : 4;\n    const int mask_par0 = mb_type & (MB_TYPE_16x16 | (MB_TYPE_8x16 >> dir));\n    if(mbm_type && !first_vertical_edge_done){\n        if (FRAME_MBAFF && (dir == 1) && ((mb_y&1) == 0)\n            && IS_INTERLACED(mbm_type&~mb_type)\n            ) {\n            unsigned int tmp_linesize   = 2 *   linesize;\n            unsigned int tmp_uvlinesize = 2 * uvlinesize;\n            int mbn_xy = mb_xy - 2 * s->mb_stride;\n            int j;\n            for(j=0; j<2; j++, mbn_xy += s->mb_stride){\n                DECLARE_ALIGNED_8(int16_t, bS)[4];\n                int qp;\n                if( IS_INTRA(mb_type|s->current_picture.mb_type[mbn_xy]) ) {\n                    *(uint64_t*)bS= 0x0003000300030003ULL;\n                } else {\n                    const uint8_t *mbn_nnz = h->non_zero_count[mbn_xy] + 4+3*8;\n                    int i;\n                    for( i = 0; i < 4; i++ ) {\n                        bS[i] = 1 + !!(h->non_zero_count_cache[scan8[0]+i] | mbn_nnz[i]);\n                    }\n                }\n                qp = ( s->current_picture.qscale_table[mb_xy] + s->current_picture.qscale_table[mbn_xy] + 1 ) >> 1;\n                tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, tmp_linesize, tmp_uvlinesize);\n                { int i; for (i = 0; i < 4; i++) tprintf(s->avctx, " bS[%d]:%d", i, bS[i]); tprintf(s->avctx, "\\n"); }\n                filter_mb_edgeh( &img_y[j*linesize], tmp_linesize, bS, qp, h );\n                filter_mb_edgech( &img_cb[j*uvlinesize], tmp_uvlinesize, bS,\n                                ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1, h);\n                filter_mb_edgech( &img_cr[j*uvlinesize], tmp_uvlinesize, bS,\n                                ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbn_xy] ) + 1 ) >> 1, h);\n            }\n        }else{\n            DECLARE_ALIGNED_8(int16_t, bS)[4];\n            int qp;\n            if( IS_INTRA(mb_type|mbm_type)) {\n                *(uint64_t*)bS= 0x0003000300030003ULL;\n                if (   (!IS_INTERLACED(mb_type|mbm_type))\n                    || ((FRAME_MBAFF || (s->picture_structure != PICT_FRAME)) && (dir == 0))\n                )\n                    *(uint64_t*)bS= 0x0004000400040004ULL;\n            } else {\n                int i, l;\n                int mv_done;\n                if( dir && FRAME_MBAFF && IS_INTERLACED(mb_type ^ mbm_type)) {\n                    *(uint64_t*)bS= 0x0001000100010001ULL;\n                    mv_done = 1;\n                }\n                else if( mask_par0 && ((mbm_type & (MB_TYPE_16x16 | (MB_TYPE_8x16 >> dir)))) ) {\n                    int b_idx= 8 + 4;\n                    int bn_idx= b_idx - (dir ? 8:1);\n                    bS[0] = bS[1] = bS[2] = bS[3] = check_mv(h, 8 + 4, bn_idx, mvy_limit);\n                    mv_done = 1;\n                }\n                else\n                    mv_done = 0;\n                for( i = 0; i < 4; i++ ) {\n                    int x = dir == 0 ? 0 : i;\n                    int y = dir == 0 ? i    : 0;\n                    int b_idx= 8 + 4 + x + 8*y;\n                    int bn_idx= b_idx - (dir ? 8:1);\n                    if( h->non_zero_count_cache[b_idx] |\n                        h->non_zero_count_cache[bn_idx] ) {\n                        bS[i] = 2;\n                    }\n                    else if(!mv_done)\n                    {\n                        bS[i] = check_mv(h, b_idx, bn_idx, mvy_limit);\n                    }\n                }\n            }\n            if(bS[0]+bS[1]+bS[2]+bS[3]){\n                qp = ( s->current_picture.qscale_table[mb_xy] + s->current_picture.qscale_table[mbm_xy] + 1 ) >> 1;\n                tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, linesize, uvlinesize);\n                if( dir == 0 ) {\n                    filter_mb_edgev( &img_y[0], linesize, bS, qp, h );\n                    {\n                        int qp= ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;\n                        filter_mb_edgecv( &img_cb[0], uvlinesize, bS, qp, h);\n                        if(h->pps.chroma_qp_diff)\n                            qp= ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;\n                        filter_mb_edgecv( &img_cr[0], uvlinesize, bS, qp, h);\n                    }\n                } else {\n                    filter_mb_edgeh( &img_y[0], linesize, bS, qp, h );\n                    {\n                        int qp= ( h->chroma_qp[0] + get_chroma_qp( h, 0, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;\n                        filter_mb_edgech( &img_cb[0], uvlinesize, bS, qp, h);\n                        if(h->pps.chroma_qp_diff)\n                            qp= ( h->chroma_qp[1] + get_chroma_qp( h, 1, s->current_picture.qscale_table[mbm_xy] ) + 1 ) >> 1;\n                        filter_mb_edgech( &img_cr[0], uvlinesize, bS, qp, h);\n                    }\n                }\n            }\n        }\n    }\n    for( edge = 1; edge < edges; edge++ ) {\n        DECLARE_ALIGNED_8(int16_t, bS)[4];\n        int qp;\n        if( IS_8x8DCT(mb_type & (edge<<24)) )\n            continue;\n        if( IS_INTRA(mb_type)) {\n            *(uint64_t*)bS= 0x0003000300030003ULL;\n        } else {\n            int i, l;\n            int mv_done;\n            if( edge & mask_edge ) {\n                *(uint64_t*)bS= 0;\n                mv_done = 1;\n            }\n            else if( mask_par0 ) {\n                int b_idx= 8 + 4 + edge * (dir ? 8:1);\n                int bn_idx= b_idx - (dir ? 8:1);\n                bS[0] = bS[1] = bS[2] = bS[3] = check_mv(h, b_idx, bn_idx, mvy_limit);\n                mv_done = 1;\n            }\n            else\n                mv_done = 0;\n            for( i = 0; i < 4; i++ ) {\n                int x = dir == 0 ? edge : i;\n                int y = dir == 0 ? i    : edge;\n                int b_idx= 8 + 4 + x + 8*y;\n                int bn_idx= b_idx - (dir ? 8:1);\n                if( h->non_zero_count_cache[b_idx] |\n                    h->non_zero_count_cache[bn_idx] ) {\n                    bS[i] = 2;\n                }\n                else if(!mv_done)\n                {\n                    bS[i] = check_mv(h, b_idx, bn_idx, mvy_limit);\n                }\n            }\n            if(bS[0]+bS[1]+bS[2]+bS[3] == 0)\n                continue;\n        }\n        qp = s->current_picture.qscale_table[mb_xy];\n        tprintf(s->avctx, "filter mb:%d/%d dir:%d edge:%d, QPy:%d ls:%d uvls:%d", mb_x, mb_y, dir, edge, qp, linesize, uvlinesize);\n        if( dir == 0 ) {\n            filter_mb_edgev( &img_y[4*edge], linesize, bS, qp, h );\n            if( (edge&1) == 0 ) {\n                filter_mb_edgecv( &img_cb[2*edge], uvlinesize, bS, h->chroma_qp[0], h);\n                filter_mb_edgecv( &img_cr[2*edge], uvlinesize, bS, h->chroma_qp[1], h);\n            }\n        } else {\n            filter_mb_edgeh( &img_y[4*edge*linesize], linesize, bS, qp, h );\n            if( (edge&1) == 0 ) {\n                filter_mb_edgech( &img_cb[2*edge*uvlinesize], uvlinesize, bS, h->chroma_qp[0], h);\n                filter_mb_edgech( &img_cr[2*edge*uvlinesize], uvlinesize, bS, h->chroma_qp[1], h);\n            }\n        }\n    }\n}']