libavcodec/h264.c:6009: error: Buffer Overrun L2
  Offset: [16, 31] Size: 24 by call to `decode_cabac_residual`.

libavcodec/h264.c:6007:22: Assignment
6005.             if( cbp&15 ) {
6006.                 qmul = h->dequant4_coeff[0][s->qscale];
6007.                 for( i = 0; i < 16; i++ ) {
                           ^
6008.                     //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 AC:%d\n", i );
6009.                     decode_cabac_residual(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);

libavcodec/h264.c:6009:21: Call
6007.                 for( i = 0; i < 16; i++ ) {
6008.                     //av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 AC:%d\n", i );
6009.                     decode_cabac_residual(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);
                          ^
6010.                 }
6011.             } else {

libavcodec/h264.c:5372:1: Parameter `n`
  5370. };
  5371. 
  5372. static void decode_cabac_residual( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff) {
        ^
  5373.     static const int significant_coeff_flag_offset[2][6] = {
  5374.       { 105+0, 105+15, 105+29, 105+44, 105+47, 402 },

libavcodec/h264.c:5441:49: Call
  5439.     /* read coded block flag */
  5440.     if( cat != 5 ) {
  5441.         if( get_cabac( CC, &h->cabac_state[85 + get_cabac_cbf_ctx( h, cat, n ) ] ) == 0 ) {
                                                        ^
  5442.             if( cat == 1 || cat == 2 )
  5443.                 h->non_zero_count_cache[scan8[n]] = 0;

libavcodec/h264.c:5337:1: <Offset trace>
5335. }
5336. 
5337. static inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx ) {
      ^
5338.     int nza, nzb;
5339.     int ctx = 0;

libavcodec/h264.c:5337:1: Parameter `idx`
    5335. }
    5336. 
    5337. static inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx ) {
          ^
    5338.     int nza, nzb;
    5339.     int ctx = 0;

libavcodec/h264data.h:271:1: <Length trace>
269. */
270. 
271. static const uint8_t scan8[16 + 2*4]={
     ^
272.  4+1*8, 5+1*8, 4+2*8, 5+2*8,
273.  6+1*8, 7+1*8, 6+2*8, 7+2*8,

libavcodec/h264data.h:271:1: Array declaration
    269. */
    270. 
    271. static const uint8_t scan8[16 + 2*4]={
         ^
    272.  4+1*8, 5+1*8, 4+2*8, 5+2*8,
    273.  6+1*8, 7+1*8, 6+2*8, 7+2*8,

libavcodec/h264.c:5352:39: Array access: Offset: [16, 31] Size: 24 by call to `decode_cabac_residual` 
    5350.     } else {
    5351.         assert(cat == 4);
    5352.         nza = h->non_zero_count_cache[scan8[16+idx] - 1];
                                                ^
    5353.         nzb = h->non_zero_count_cache[scan8[16+idx] - 8];
    5354.     }

static inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx ) {
    int nza, nzb;
    int ctx = 0;
    if( cat == 0 ) {
        nza = h->left_cbp&0x100;
        nzb = h-> top_cbp&0x100;
    } else if( cat == 1 || cat == 2 ) {
        nza = h->non_zero_count_cache[scan8[idx] - 1];
        nzb = h->non_zero_count_cache[scan8[idx] - 8];
    } else if( cat == 3 ) {
        nza = (h->left_cbp>>(6+idx))&0x01;
        nzb = (h-> top_cbp>>(6+idx))&0x01;
    } else {
        assert(cat == 4);
        nza = h->non_zero_count_cache[scan8[16+idx] - 1];
        nzb = h->non_zero_count_cache[scan8[16+idx] - 8];
    }
    if( nza > 0 )
        ctx++;
    if( nzb > 0 )
        ctx += 2;
    return ctx + 4 * cat;
}
['static int decode_mb_cabac(H264Context *h) {\n    MpegEncContext * const s = &h->s;\n    int mb_xy;\n    int mb_type, partition_count, cbp = 0;\n    int dct8x8_allowed= h->pps.transform_8x8_mode;\n    mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;\n    s->dsp.clear_blocks(h->mb);\n    tprintf(s->avctx, "pic:%d mb:%d/%d\\n", h->frame_num, s->mb_x, s->mb_y);\n    if( h->slice_type != FF_I_TYPE && h->slice_type != FF_SI_TYPE ) {\n        int skip;\n        if( FRAME_MBAFF && s->mb_x==0 && (s->mb_y&1)==0 )\n            predict_field_decoding_flag(h);\n        if( FRAME_MBAFF && (s->mb_y&1)==1 && h->prev_mb_skipped )\n            skip = h->next_mb_skipped;\n        else\n            skip = decode_cabac_mb_skip( h, s->mb_x, s->mb_y );\n        if( skip ) {\n            if( FRAME_MBAFF && (s->mb_y&1)==0 ){\n                s->current_picture.mb_type[mb_xy] = MB_TYPE_SKIP;\n                h->next_mb_skipped = decode_cabac_mb_skip( h, s->mb_x, s->mb_y+1 );\n                if(h->next_mb_skipped)\n                    predict_field_decoding_flag(h);\n                else\n                    h->mb_mbaff = h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);\n            }\n            decode_mb_skip(h);\n            h->cbp_table[mb_xy] = 0;\n            h->chroma_pred_mode_table[mb_xy] = 0;\n            h->last_qscale_diff = 0;\n            return 0;\n        }\n    }\n    if(FRAME_MBAFF){\n        if( (s->mb_y&1) == 0 )\n            h->mb_mbaff =\n            h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);\n    }else\n        h->mb_field_decoding_flag= (s->picture_structure!=PICT_FRAME);\n    h->prev_mb_skipped = 0;\n    compute_mb_neighbors(h);\n    if( ( mb_type = decode_cabac_mb_type( h ) ) < 0 ) {\n        av_log( h->s.avctx, AV_LOG_ERROR, "decode_cabac_mb_type failed\\n" );\n        return -1;\n    }\n    if( h->slice_type == FF_B_TYPE ) {\n        if( mb_type < 23 ){\n            partition_count= b_mb_type_info[mb_type].partition_count;\n            mb_type=         b_mb_type_info[mb_type].type;\n        }else{\n            mb_type -= 23;\n            goto decode_intra_mb;\n        }\n    } else if( h->slice_type == FF_P_TYPE ) {\n        if( mb_type < 5) {\n            partition_count= p_mb_type_info[mb_type].partition_count;\n            mb_type=         p_mb_type_info[mb_type].type;\n        } else {\n            mb_type -= 5;\n            goto decode_intra_mb;\n        }\n    } else {\n       assert(h->slice_type == FF_I_TYPE);\ndecode_intra_mb:\n        partition_count = 0;\n        cbp= i_mb_type_info[mb_type].cbp;\n        h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;\n        mb_type= i_mb_type_info[mb_type].type;\n    }\n    if(MB_FIELD)\n        mb_type |= MB_TYPE_INTERLACED;\n    h->slice_table[ mb_xy ]= h->slice_num;\n    if(IS_INTRA_PCM(mb_type)) {\n        const uint8_t *ptr;\n        unsigned int x, y;\n        ptr= h->cabac.bytestream;\n        if(h->cabac.low&0x1) ptr--;\n        if(CABAC_BITS==16){\n            if(h->cabac.low&0x1FF) ptr--;\n        }\n        for(y=0; y<16; y++){\n            const int index= 4*(y&3) + 32*((y>>2)&1) + 128*(y>>3);\n            for(x=0; x<16; x++){\n                tprintf(s->avctx, "LUMA ICPM LEVEL (%3d)\\n", *ptr);\n                h->mb[index + (x&3) + 16*((x>>2)&1) + 64*(x>>3)]= *ptr++;\n            }\n        }\n        for(y=0; y<8; y++){\n            const int index= 256 + 4*(y&3) + 32*(y>>2);\n            for(x=0; x<8; x++){\n                tprintf(s->avctx, "CHROMA U ICPM LEVEL (%3d)\\n", *ptr);\n                h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;\n            }\n        }\n        for(y=0; y<8; y++){\n            const int index= 256 + 64 + 4*(y&3) + 32*(y>>2);\n            for(x=0; x<8; x++){\n                tprintf(s->avctx, "CHROMA V ICPM LEVEL (%3d)\\n", *ptr);\n                h->mb[index + (x&3) + 16*(x>>2)]= *ptr++;\n            }\n        }\n        ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);\n        h->cbp_table[mb_xy] = 0x1ef;\n        h->chroma_pred_mode_table[mb_xy] = 0;\n        s->current_picture.qscale_table[mb_xy]= 0;\n        h->chroma_qp[0] = get_chroma_qp(h, 0, 0);\n        h->chroma_qp[1] = get_chroma_qp(h, 1, 0);\n        memset(h->non_zero_count[mb_xy], 16, 16);\n        s->current_picture.mb_type[mb_xy]= mb_type;\n        return 0;\n    }\n    if(MB_MBAFF){\n        h->ref_count[0] <<= 1;\n        h->ref_count[1] <<= 1;\n    }\n    fill_caches(h, mb_type, 0);\n    if( IS_INTRA( mb_type ) ) {\n        int i, pred_mode;\n        if( IS_INTRA4x4( mb_type ) ) {\n            if( dct8x8_allowed && decode_cabac_mb_transform_size( h ) ) {\n                mb_type |= MB_TYPE_8x8DCT;\n                for( i = 0; i < 16; i+=4 ) {\n                    int pred = pred_intra_mode( h, i );\n                    int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );\n                    fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );\n                }\n            } else {\n                for( i = 0; i < 16; i++ ) {\n                    int pred = pred_intra_mode( h, i );\n                    h->intra4x4_pred_mode_cache[ scan8[i] ] = decode_cabac_mb_intra4x4_pred_mode( h, pred );\n                }\n            }\n            write_back_intra_pred_mode(h);\n            if( check_intra4x4_pred_mode(h) < 0 ) return -1;\n        } else {\n            h->intra16x16_pred_mode= check_intra_pred_mode( h, h->intra16x16_pred_mode );\n            if( h->intra16x16_pred_mode < 0 ) return -1;\n        }\n        h->chroma_pred_mode_table[mb_xy] =\n        pred_mode                        = decode_cabac_mb_chroma_pre_mode( h );\n        pred_mode= check_intra_pred_mode( h, pred_mode );\n        if( pred_mode < 0 ) return -1;\n        h->chroma_pred_mode= pred_mode;\n    } else if( partition_count == 4 ) {\n        int i, j, sub_partition_count[4], list, ref[2][4];\n        if( h->slice_type == FF_B_TYPE ) {\n            for( i = 0; i < 4; i++ ) {\n                h->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );\n                sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;\n                h->sub_mb_type[i]=      b_sub_mb_type_info[ h->sub_mb_type[i] ].type;\n            }\n            if( IS_DIRECT(h->sub_mb_type[0] | h->sub_mb_type[1] |\n                          h->sub_mb_type[2] | h->sub_mb_type[3]) ) {\n                pred_direct_motion(h, &mb_type);\n                h->ref_cache[0][scan8[4]] =\n                h->ref_cache[1][scan8[4]] =\n                h->ref_cache[0][scan8[12]] =\n                h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;\n                if( h->ref_count[0] > 1 || h->ref_count[1] > 1 ) {\n                    for( i = 0; i < 4; i++ )\n                        if( IS_DIRECT(h->sub_mb_type[i]) )\n                            fill_rectangle( &h->direct_cache[scan8[4*i]], 2, 2, 8, 1, 1 );\n                }\n            }\n        } else {\n            for( i = 0; i < 4; i++ ) {\n                h->sub_mb_type[i] = decode_cabac_p_mb_sub_type( h );\n                sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;\n                h->sub_mb_type[i]=      p_sub_mb_type_info[ h->sub_mb_type[i] ].type;\n            }\n        }\n        for( list = 0; list < h->list_count; list++ ) {\n                for( i = 0; i < 4; i++ ) {\n                    if(IS_DIRECT(h->sub_mb_type[i])) continue;\n                    if(IS_DIR(h->sub_mb_type[i], 0, list)){\n                        if( h->ref_count[list] > 1 )\n                            ref[list][i] = decode_cabac_mb_ref( h, list, 4*i );\n                        else\n                            ref[list][i] = 0;\n                    } else {\n                        ref[list][i] = -1;\n                    }\n                                                       h->ref_cache[list][ scan8[4*i]+1 ]=\n                    h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];\n                }\n        }\n        if(dct8x8_allowed)\n            dct8x8_allowed = get_dct8x8_allowed(h);\n        for(list=0; list<h->list_count; list++){\n            for(i=0; i<4; i++){\n                h->ref_cache[list][ scan8[4*i]   ]=h->ref_cache[list][ scan8[4*i]+1 ];\n                if(IS_DIRECT(h->sub_mb_type[i])){\n                    fill_rectangle(h->mvd_cache[list][scan8[4*i]], 2, 2, 8, 0, 4);\n                    continue;\n                }\n                if(IS_DIR(h->sub_mb_type[i], 0, list) && !IS_DIRECT(h->sub_mb_type[i])){\n                    const int sub_mb_type= h->sub_mb_type[i];\n                    const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;\n                    for(j=0; j<sub_partition_count[i]; j++){\n                        int mpx, mpy;\n                        int mx, my;\n                        const int index= 4*i + block_width*j;\n                        int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];\n                        int16_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];\n                        pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mpx, &mpy);\n                        mx = mpx + decode_cabac_mb_mvd( h, list, index, 0 );\n                        my = mpy + decode_cabac_mb_mvd( h, list, index, 1 );\n                        tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                        if(IS_SUB_8X8(sub_mb_type)){\n                            mv_cache[ 1 ][0]=\n                            mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;\n                            mv_cache[ 1 ][1]=\n                            mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;\n                            mvd_cache[ 1 ][0]=\n                            mvd_cache[ 8 ][0]= mvd_cache[ 9 ][0]= mx - mpx;\n                            mvd_cache[ 1 ][1]=\n                            mvd_cache[ 8 ][1]= mvd_cache[ 9 ][1]= my - mpy;\n                        }else if(IS_SUB_8X4(sub_mb_type)){\n                            mv_cache[ 1 ][0]= mx;\n                            mv_cache[ 1 ][1]= my;\n                            mvd_cache[ 1 ][0]= mx - mpx;\n                            mvd_cache[ 1 ][1]= my - mpy;\n                        }else if(IS_SUB_4X8(sub_mb_type)){\n                            mv_cache[ 8 ][0]= mx;\n                            mv_cache[ 8 ][1]= my;\n                            mvd_cache[ 8 ][0]= mx - mpx;\n                            mvd_cache[ 8 ][1]= my - mpy;\n                        }\n                        mv_cache[ 0 ][0]= mx;\n                        mv_cache[ 0 ][1]= my;\n                        mvd_cache[ 0 ][0]= mx - mpx;\n                        mvd_cache[ 0 ][1]= my - mpy;\n                    }\n                }else{\n                    uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];\n                    uint32_t *pd= (uint32_t *)&h->mvd_cache[list][ scan8[4*i] ][0];\n                    p[0] = p[1] = p[8] = p[9] = 0;\n                    pd[0]= pd[1]= pd[8]= pd[9]= 0;\n                }\n            }\n        }\n    } else if( IS_DIRECT(mb_type) ) {\n        pred_direct_motion(h, &mb_type);\n        fill_rectangle(h->mvd_cache[0][scan8[0]], 4, 4, 8, 0, 4);\n        fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 4);\n        dct8x8_allowed &= h->sps.direct_8x8_inference_flag;\n    } else {\n        int list, mx, my, i, mpx, mpy;\n        if(IS_16X16(mb_type)){\n            for(list=0; list<h->list_count; list++){\n                if(IS_DIR(mb_type, 0, list)){\n                        const int ref = h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 0 ) : 0;\n                        fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, ref, 1);\n                }else\n                    fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, (uint8_t)LIST_NOT_USED, 1);\n            }\n            for(list=0; list<h->list_count; list++){\n                if(IS_DIR(mb_type, 0, list)){\n                    pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mpx, &mpy);\n                    mx = mpx + decode_cabac_mb_mvd( h, list, 0, 0 );\n                    my = mpy + decode_cabac_mb_mvd( h, list, 0, 1 );\n                    tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                    fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx-mpx,my-mpy), 4);\n                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);\n                }else\n                    fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, 0, 4);\n            }\n        }\n        else if(IS_16X8(mb_type)){\n            for(list=0; list<h->list_count; list++){\n                    for(i=0; i<2; i++){\n                        if(IS_DIR(mb_type, i, list)){\n                            const int ref= h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 8*i ) : 0;\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, ref, 1);\n                        }else\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, (LIST_NOT_USED&0xFF), 1);\n                    }\n            }\n            for(list=0; list<h->list_count; list++){\n                for(i=0; i<2; i++){\n                    if(IS_DIR(mb_type, i, list)){\n                        pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mpx, &mpy);\n                        mx = mpx + decode_cabac_mb_mvd( h, list, 8*i, 0 );\n                        my = mpy + decode_cabac_mb_mvd( h, list, 8*i, 1 );\n                        tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx-mpx,my-mpy), 4);\n                        fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);\n                    }else{\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);\n                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);\n                    }\n                }\n            }\n        }else{\n            assert(IS_8X16(mb_type));\n            for(list=0; list<h->list_count; list++){\n                    for(i=0; i<2; i++){\n                        if(IS_DIR(mb_type, i, list)){\n                            const int ref= h->ref_count[list] > 1 ? decode_cabac_mb_ref( h, list, 4*i ) : 0;\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, ref, 1);\n                        }else\n                            fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, (LIST_NOT_USED&0xFF), 1);\n                    }\n            }\n            for(list=0; list<h->list_count; list++){\n                for(i=0; i<2; i++){\n                    if(IS_DIR(mb_type, i, list)){\n                        pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mpx, &mpy);\n                        mx = mpx + decode_cabac_mb_mvd( h, list, 4*i, 0 );\n                        my = mpy + decode_cabac_mb_mvd( h, list, 4*i, 1 );\n                        tprintf(s->avctx, "final mv:%d %d\\n", mx, my);\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx-mpx,my-mpy), 4);\n                        fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);\n                    }else{\n                        fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);\n                        fill_rectangle(h-> mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);\n                    }\n                }\n            }\n        }\n    }\n   if( IS_INTER( mb_type ) ) {\n        h->chroma_pred_mode_table[mb_xy] = 0;\n        write_back_motion( h, mb_type );\n   }\n    if( !IS_INTRA16x16( mb_type ) ) {\n        cbp  = decode_cabac_mb_cbp_luma( h );\n        cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;\n    }\n    h->cbp_table[mb_xy] = h->cbp = cbp;\n    if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {\n        if( decode_cabac_mb_transform_size( h ) )\n            mb_type |= MB_TYPE_8x8DCT;\n    }\n    s->current_picture.mb_type[mb_xy]= mb_type;\n    if( cbp || IS_INTRA16x16( mb_type ) ) {\n        const uint8_t *scan, *scan8x8, *dc_scan;\n        const uint32_t *qmul;\n        int dqp;\n        if(IS_INTERLACED(mb_type)){\n            scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;\n            scan= s->qscale ? h->field_scan : h->field_scan_q0;\n            dc_scan= luma_dc_field_scan;\n        }else{\n            scan8x8= s->qscale ? h->zigzag_scan8x8 : h->zigzag_scan8x8_q0;\n            scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;\n            dc_scan= luma_dc_zigzag_scan;\n        }\n        h->last_qscale_diff = dqp = decode_cabac_mb_dqp( h );\n        if( dqp == INT_MIN ){\n            av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\\n", s->mb_x, s->mb_y);\n            return -1;\n        }\n        s->qscale += dqp;\n        if(((unsigned)s->qscale) > 51){\n            if(s->qscale<0) s->qscale+= 52;\n            else            s->qscale-= 52;\n        }\n        h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);\n        h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);\n        if( IS_INTRA16x16( mb_type ) ) {\n            int i;\n            decode_cabac_residual( h, h->mb, 0, 0, dc_scan, NULL, 16);\n            if( cbp&15 ) {\n                qmul = h->dequant4_coeff[0][s->qscale];\n                for( i = 0; i < 16; i++ ) {\n                    decode_cabac_residual(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);\n                }\n            } else {\n                fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);\n            }\n        } else {\n            int i8x8, i4x4;\n            for( i8x8 = 0; i8x8 < 4; i8x8++ ) {\n                if( cbp & (1<<i8x8) ) {\n                    if( IS_8x8DCT(mb_type) ) {\n                        decode_cabac_residual(h, h->mb + 64*i8x8, 5, 4*i8x8,\n                            scan8x8, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 64);\n                    } else {\n                        qmul = h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale];\n                        for( i4x4 = 0; i4x4 < 4; i4x4++ ) {\n                            const int index = 4*i8x8 + i4x4;\n                            decode_cabac_residual(h, h->mb + 16*index, 2, index, scan, qmul, 16);\n                        }\n                    }\n                } else {\n                    uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];\n                    nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;\n                }\n            }\n        }\n        if( cbp&0x30 ){\n            int c;\n            for( c = 0; c < 2; c++ ) {\n                decode_cabac_residual(h, h->mb + 256 + 16*4*c, 3, c, chroma_dc_scan, NULL, 4);\n            }\n        }\n        if( cbp&0x20 ) {\n            int c, i;\n            for( c = 0; c < 2; c++ ) {\n                qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]];\n                for( i = 0; i < 4; i++ ) {\n                    const int index = 16 + 4 * c + i;\n                    decode_cabac_residual(h, h->mb + 16*index, 4, index - 16, scan + 1, qmul, 15);\n                }\n            }\n        } else {\n            uint8_t * const nnz= &h->non_zero_count_cache[0];\n            nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =\n            nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;\n        }\n    } else {\n        uint8_t * const nnz= &h->non_zero_count_cache[0];\n        fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);\n        nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =\n        nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;\n        h->last_qscale_diff = 0;\n    }\n    s->current_picture.qscale_table[mb_xy]= s->qscale;\n    write_back_non_zero_count(h);\n    if(MB_MBAFF){\n        h->ref_count[0] >>= 1;\n        h->ref_count[1] >>= 1;\n    }\n    return 0;\n}', 'static void decode_cabac_residual( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff) {\n    static const int significant_coeff_flag_offset[2][6] = {\n      { 105+0, 105+15, 105+29, 105+44, 105+47, 402 },\n      { 277+0, 277+15, 277+29, 277+44, 277+47, 436 }\n    };\n    static const int last_coeff_flag_offset[2][6] = {\n      { 166+0, 166+15, 166+29, 166+44, 166+47, 417 },\n      { 338+0, 338+15, 338+29, 338+44, 338+47, 451 }\n    };\n    static const int coeff_abs_level_m1_offset[6] = {\n        227+0, 227+10, 227+20, 227+30, 227+39, 426\n    };\n    static const uint8_t significant_coeff_flag_offset_8x8[2][63] = {\n      { 0, 1, 2, 3, 4, 5, 5, 4, 4, 3, 3, 4, 4, 4, 5, 5,\n        4, 4, 4, 4, 3, 3, 6, 7, 7, 7, 8, 9,10, 9, 8, 7,\n        7, 6,11,12,13,11, 6, 7, 8, 9,14,10, 9, 8, 6,11,\n       12,13,11, 6, 9,14,10, 9,11,12,13,11,14,10,12 },\n      { 0, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 7, 7, 8, 4, 5,\n        6, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,11,12,11,\n        9, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,13,13, 9,\n        9,10,10, 8,13,13, 9, 9,10,10,14,14,14,14,14 }\n    };\n    static const uint8_t coeff_abs_level1_ctx[8] = { 1, 2, 3, 4, 0, 0, 0, 0 };\n    static const uint8_t coeff_abs_levelgt1_ctx[8] = { 5, 5, 5, 5, 6, 7, 8, 9 };\n    static const uint8_t coeff_abs_level_transition[2][8] = {\n        { 1, 2, 3, 3, 4, 5, 6, 7 },\n        { 4, 4, 4, 4, 5, 6, 7, 7 }\n    };\n    int index[64];\n    int av_unused last;\n    int coeff_count = 0;\n    int node_ctx = 0;\n    uint8_t *significant_coeff_ctx_base;\n    uint8_t *last_coeff_ctx_base;\n    uint8_t *abs_level_m1_ctx_base;\n#ifndef ARCH_X86\n#define CABAC_ON_STACK\n#endif\n#ifdef CABAC_ON_STACK\n#define CC &cc\n    CABACContext cc;\n    cc.range     = h->cabac.range;\n    cc.low       = h->cabac.low;\n    cc.bytestream= h->cabac.bytestream;\n#else\n#define CC &h->cabac\n#endif\n    if( cat != 5 ) {\n        if( get_cabac( CC, &h->cabac_state[85 + get_cabac_cbf_ctx( h, cat, n ) ] ) == 0 ) {\n            if( cat == 1 || cat == 2 )\n                h->non_zero_count_cache[scan8[n]] = 0;\n            else if( cat == 4 )\n                h->non_zero_count_cache[scan8[16+n]] = 0;\n#ifdef CABAC_ON_STACK\n            h->cabac.range     = cc.range     ;\n            h->cabac.low       = cc.low       ;\n            h->cabac.bytestream= cc.bytestream;\n#endif\n            return;\n        }\n    }\n    significant_coeff_ctx_base = h->cabac_state\n        + significant_coeff_flag_offset[MB_FIELD][cat];\n    last_coeff_ctx_base = h->cabac_state\n        + last_coeff_flag_offset[MB_FIELD][cat];\n    abs_level_m1_ctx_base = h->cabac_state\n        + coeff_abs_level_m1_offset[cat];\n    if( cat == 5 ) {\n#define DECODE_SIGNIFICANCE( coefs, sig_off, last_off ) \\\n        for(last= 0; last < coefs; last++) { \\\n            uint8_t *sig_ctx = significant_coeff_ctx_base + sig_off; \\\n            if( get_cabac( CC, sig_ctx )) { \\\n                uint8_t *last_ctx = last_coeff_ctx_base + last_off; \\\n                index[coeff_count++] = last; \\\n                if( get_cabac( CC, last_ctx ) ) { \\\n                    last= max_coeff; \\\n                    break; \\\n                } \\\n            } \\\n        }\\\n        if( last == max_coeff -1 ) {\\\n            index[coeff_count++] = last;\\\n        }\n        const uint8_t *sig_off = significant_coeff_flag_offset_8x8[MB_FIELD];\n#if defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)\n        coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index, sig_off);\n    } else {\n        coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index);\n#else\n        DECODE_SIGNIFICANCE( 63, sig_off[last], last_coeff_flag_offset_8x8[last] );\n    } else {\n        DECODE_SIGNIFICANCE( max_coeff - 1, last, last );\n#endif\n    }\n    assert(coeff_count > 0);\n    if( cat == 0 )\n        h->cbp_table[h->mb_xy] |= 0x100;\n    else if( cat == 1 || cat == 2 )\n        h->non_zero_count_cache[scan8[n]] = coeff_count;\n    else if( cat == 3 )\n        h->cbp_table[h->mb_xy] |= 0x40 << n;\n    else if( cat == 4 )\n        h->non_zero_count_cache[scan8[16+n]] = coeff_count;\n    else {\n        assert( cat == 5 );\n        fill_rectangle(&h->non_zero_count_cache[scan8[n]], 2, 2, 8, coeff_count, 1);\n    }\n    for( coeff_count--; coeff_count >= 0; coeff_count-- ) {\n        uint8_t *ctx = coeff_abs_level1_ctx[node_ctx] + abs_level_m1_ctx_base;\n        int j= scantable[index[coeff_count]];\n        if( get_cabac( CC, ctx ) == 0 ) {\n            node_ctx = coeff_abs_level_transition[0][node_ctx];\n            if( !qmul ) {\n                block[j] = get_cabac_bypass_sign( CC, -1);\n            }else{\n                block[j] = (get_cabac_bypass_sign( CC, -qmul[j]) + 32) >> 6;\n            }\n        } else {\n            int coeff_abs = 2;\n            ctx = coeff_abs_levelgt1_ctx[node_ctx] + abs_level_m1_ctx_base;\n            node_ctx = coeff_abs_level_transition[1][node_ctx];\n            while( coeff_abs < 15 && get_cabac( CC, ctx ) ) {\n                coeff_abs++;\n            }\n            if( coeff_abs >= 15 ) {\n                int j = 0;\n                while( get_cabac_bypass( CC ) ) {\n                    j++;\n                }\n                coeff_abs=1;\n                while( j-- ) {\n                    coeff_abs += coeff_abs + get_cabac_bypass( CC );\n                }\n                coeff_abs+= 14;\n            }\n            if( !qmul ) {\n                if( get_cabac_bypass( CC ) ) block[j] = -coeff_abs;\n                else                                block[j] =  coeff_abs;\n            }else{\n                if( get_cabac_bypass( CC ) ) block[j] = (-coeff_abs * qmul[j] + 32) >> 6;\n                else                                block[j] = ( coeff_abs * qmul[j] + 32) >> 6;\n            }\n        }\n    }\n#ifdef CABAC_ON_STACK\n            h->cabac.range     = cc.range     ;\n            h->cabac.low       = cc.low       ;\n            h->cabac.bytestream= cc.bytestream;\n#endif\n}', 'static inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx ) {\n    int nza, nzb;\n    int ctx = 0;\n    if( cat == 0 ) {\n        nza = h->left_cbp&0x100;\n        nzb = h-> top_cbp&0x100;\n    } else if( cat == 1 || cat == 2 ) {\n        nza = h->non_zero_count_cache[scan8[idx] - 1];\n        nzb = h->non_zero_count_cache[scan8[idx] - 8];\n    } else if( cat == 3 ) {\n        nza = (h->left_cbp>>(6+idx))&0x01;\n        nzb = (h-> top_cbp>>(6+idx))&0x01;\n    } else {\n        assert(cat == 4);\n        nza = h->non_zero_count_cache[scan8[16+idx] - 1];\n        nzb = h->non_zero_count_cache[scan8[16+idx] - 8];\n    }\n    if( nza > 0 )\n        ctx++;\n    if( nzb > 0 )\n        ctx += 2;\n    return ctx + 4 * cat;\n}']