h264: move fill_decode_neighbors()/fill_decode_caches() to h264_mvpred.h

This fixes a bunch of unused function warnings.

2 files changed, 418 insertions, 418 deletions

diff --git a/libavcodec/h264.h b/libavcodec/h264.h
index 95b471539d..122a54aca0 100644
--- a/libavcodec/h264.h
+++ b/libavcodec/h264.h
@@ -770,424 +770,6 @@ static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale){
     return h->pps.chroma_qp_table[t][qscale];
 }
 
-static void fill_decode_neighbors(H264Context *h, int mb_type){
-    MpegEncContext * const s = &h->s;
-    const int mb_xy= h->mb_xy;
-    int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];
-    static const uint8_t left_block_options[4][32]={
-        {0,1,2,3,7,10,8,11,3+0*4, 3+1*4, 3+2*4, 3+3*4, 1+4*4, 1+8*4, 1+5*4, 1+9*4},
-        {2,2,3,3,8,11,8,11,3+2*4, 3+2*4, 3+3*4, 3+3*4, 1+5*4, 1+9*4, 1+5*4, 1+9*4},
-        {0,0,1,1,7,10,7,10,3+0*4, 3+0*4, 3+1*4, 3+1*4, 1+4*4, 1+8*4, 1+4*4, 1+8*4},
-        {0,2,0,2,7,10,7,10,3+0*4, 3+2*4, 3+0*4, 3+2*4, 1+4*4, 1+8*4, 1+4*4, 1+8*4}
-    };
-
-    h->topleft_partition= -1;
-
-    top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
-
-    /* Wow, what a mess, why didn't they simplify the interlacing & intra
-     * stuff, I can't imagine that these complex rules are worth it. */
-
-    topleft_xy = top_xy - 1;
-    topright_xy= top_xy + 1;
-    left_xy[LBOT] = left_xy[LTOP] = mb_xy-1;
-    h->left_block = left_block_options[0];
-    if(FRAME_MBAFF){
-        const int left_mb_field_flag = IS_INTERLACED(s->current_picture.f.mb_type[mb_xy - 1]);
-        const int curr_mb_field_flag = IS_INTERLACED(mb_type);
-        if(s->mb_y&1){
-            if (left_mb_field_flag != curr_mb_field_flag) {
-                left_xy[LBOT] = left_xy[LTOP] = mb_xy - s->mb_stride - 1;
-                if (curr_mb_field_flag) {
-                    left_xy[LBOT] += s->mb_stride;
-                    h->left_block = left_block_options[3];
-                } else {
-                    topleft_xy += s->mb_stride;
-                    // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
-                    h->topleft_partition = 0;
-                    h->left_block = left_block_options[1];
-                }
-            }
-        }else{
-            if(curr_mb_field_flag){
-                topleft_xy  += s->mb_stride & (((s->current_picture.f.mb_type[top_xy - 1] >> 7) & 1) - 1);
-                topright_xy += s->mb_stride & (((s->current_picture.f.mb_type[top_xy + 1] >> 7) & 1) - 1);
-                top_xy      += s->mb_stride & (((s->current_picture.f.mb_type[top_xy    ] >> 7) & 1) - 1);
-            }
-            if (left_mb_field_flag != curr_mb_field_flag) {
-                if (curr_mb_field_flag) {
-                    left_xy[LBOT] += s->mb_stride;
-                    h->left_block = left_block_options[3];
-                } else {
-                    h->left_block = left_block_options[2];
-                }
-            }
-        }
-    }
-
-    h->topleft_mb_xy = topleft_xy;
-    h->top_mb_xy     = top_xy;
-    h->topright_mb_xy= topright_xy;
-    h->left_mb_xy[LTOP] = left_xy[LTOP];
-    h->left_mb_xy[LBOT] = left_xy[LBOT];
-    //FIXME do we need all in the context?
-
-    h->topleft_type    = s->current_picture.f.mb_type[topleft_xy];
-    h->top_type        = s->current_picture.f.mb_type[top_xy];
-    h->topright_type   = s->current_picture.f.mb_type[topright_xy];
-    h->left_type[LTOP] = s->current_picture.f.mb_type[left_xy[LTOP]];
-    h->left_type[LBOT] = s->current_picture.f.mb_type[left_xy[LBOT]];
-
-    if(FMO){
-    if(h->slice_table[topleft_xy    ] != h->slice_num) h->topleft_type = 0;
-    if(h->slice_table[top_xy        ] != h->slice_num) h->top_type     = 0;
-    if(h->slice_table[left_xy[LTOP] ] != h->slice_num) h->left_type[LTOP] = h->left_type[LBOT] = 0;
-    }else{
-        if(h->slice_table[topleft_xy ] != h->slice_num){
-            h->topleft_type = 0;
-            if(h->slice_table[top_xy        ] != h->slice_num) h->top_type     = 0;
-            if(h->slice_table[left_xy[LTOP] ] != h->slice_num) h->left_type[LTOP] = h->left_type[LBOT] = 0;
-        }
-    }
-    if(h->slice_table[topright_xy] != h->slice_num) h->topright_type= 0;
-}
-
-static void fill_decode_caches(H264Context *h, int mb_type){
-    MpegEncContext * const s = &h->s;
-    int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];
-    int topleft_type, top_type, topright_type, left_type[LEFT_MBS];
-    const uint8_t * left_block= h->left_block;
-    int i;
-    uint8_t *nnz;
-    uint8_t *nnz_cache;
-
-    topleft_xy     = h->topleft_mb_xy;
-    top_xy         = h->top_mb_xy;
-    topright_xy    = h->topright_mb_xy;
-    left_xy[LTOP]  = h->left_mb_xy[LTOP];
-    left_xy[LBOT]  = h->left_mb_xy[LBOT];
-    topleft_type   = h->topleft_type;
-    top_type       = h->top_type;
-    topright_type  = h->topright_type;
-    left_type[LTOP]= h->left_type[LTOP];
-    left_type[LBOT]= h->left_type[LBOT];
-
-    if(!IS_SKIP(mb_type)){
-        if(IS_INTRA(mb_type)){
-            int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
-            h->topleft_samples_available=
-            h->top_samples_available=
-            h->left_samples_available= 0xFFFF;
-            h->topright_samples_available= 0xEEEA;
-
-            if(!(top_type & type_mask)){
-                h->topleft_samples_available= 0xB3FF;
-                h->top_samples_available= 0x33FF;
-                h->topright_samples_available= 0x26EA;
-            }
-            if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[LTOP])){
-                if(IS_INTERLACED(mb_type)){
-                    if(!(left_type[LTOP] & type_mask)){
-                        h->topleft_samples_available&= 0xDFFF;
-                        h->left_samples_available&= 0x5FFF;
-                    }
-                    if(!(left_type[LBOT] & type_mask)){
-                        h->topleft_samples_available&= 0xFF5F;
-                        h->left_samples_available&= 0xFF5F;
-                    }
-                }else{
-                    int left_typei = s->current_picture.f.mb_type[left_xy[LTOP] + s->mb_stride];
-
-                    assert(left_xy[LTOP] == left_xy[LBOT]);
-                    if(!((left_typei & type_mask) && (left_type[LTOP] & type_mask))){
-                        h->topleft_samples_available&= 0xDF5F;
-                        h->left_samples_available&= 0x5F5F;
-                    }
-                }
-            }else{
-                if(!(left_type[LTOP] & type_mask)){
-                    h->topleft_samples_available&= 0xDF5F;
-                    h->left_samples_available&= 0x5F5F;
-                }
-            }
-
-            if(!(topleft_type & type_mask))
-                h->topleft_samples_available&= 0x7FFF;
-
-            if(!(topright_type & type_mask))
-                h->topright_samples_available&= 0xFBFF;
-
-            if(IS_INTRA4x4(mb_type)){
-                if(IS_INTRA4x4(top_type)){
-                    AV_COPY32(h->intra4x4_pred_mode_cache+4+8*0, h->intra4x4_pred_mode + h->mb2br_xy[top_xy]);
-                }else{
-                    h->intra4x4_pred_mode_cache[4+8*0]=
-                    h->intra4x4_pred_mode_cache[5+8*0]=
-                    h->intra4x4_pred_mode_cache[6+8*0]=
-                    h->intra4x4_pred_mode_cache[7+8*0]= 2 - 3*!(top_type & type_mask);
-                }
-                for(i=0; i<2; i++){
-                    if(IS_INTRA4x4(left_type[LEFT(i)])){
-                        int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[left_xy[LEFT(i)]];
-                        h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= mode[6-left_block[0+2*i]];
-                        h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= mode[6-left_block[1+2*i]];
-                    }else{
-                        h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
-                        h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= 2 - 3*!(left_type[LEFT(i)] & type_mask);
-                    }
-                }
-            }
-        }
-
-
-/*
-0 . T T. T T T T
-1 L . .L . . . .
-2 L . .L . . . .
-3 . T TL . . . .
-4 L . .L . . . .
-5 L . .. . . . .
-*/
-//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
-    nnz_cache = h->non_zero_count_cache;
-    if(top_type){
-        nnz = h->non_zero_count[top_xy];
-        AV_COPY32(&nnz_cache[4+8* 0], &nnz[4*3]);
-        if(CHROMA444){
-            AV_COPY32(&nnz_cache[4+8* 5], &nnz[4* 7]);
-            AV_COPY32(&nnz_cache[4+8*10], &nnz[4*11]);
-        }else{
-            AV_COPY32(&nnz_cache[4+8* 5], &nnz[4* 5]);
-            AV_COPY32(&nnz_cache[4+8*10], &nnz[4* 9]);
-        }
-    }else{
-        uint32_t top_empty = CABAC && !IS_INTRA(mb_type) ? 0 : 0x40404040;
-        AV_WN32A(&nnz_cache[4+8* 0], top_empty);
-        AV_WN32A(&nnz_cache[4+8* 5], top_empty);
-        AV_WN32A(&nnz_cache[4+8*10], top_empty);
-    }
-
-    for (i=0; i<2; i++) {
-        if(left_type[LEFT(i)]){
-            nnz = h->non_zero_count[left_xy[LEFT(i)]];
-            nnz_cache[3+8* 1 + 2*8*i]= nnz[left_block[8+0+2*i]];
-            nnz_cache[3+8* 2 + 2*8*i]= nnz[left_block[8+1+2*i]];
-            if(CHROMA444){
-                nnz_cache[3+8* 6 + 2*8*i]= nnz[left_block[8+0+2*i]+4*4];
-                nnz_cache[3+8* 7 + 2*8*i]= nnz[left_block[8+1+2*i]+4*4];
-                nnz_cache[3+8*11 + 2*8*i]= nnz[left_block[8+0+2*i]+8*4];
-                nnz_cache[3+8*12 + 2*8*i]= nnz[left_block[8+1+2*i]+8*4];
-            }else{
-                nnz_cache[3+8* 6 +   8*i]= nnz[left_block[8+4+2*i]];
-                nnz_cache[3+8*11 +   8*i]= nnz[left_block[8+5+2*i]];
-            }
-        }else{
-            nnz_cache[3+8* 1 + 2*8*i]=
-            nnz_cache[3+8* 2 + 2*8*i]=
-            nnz_cache[3+8* 6 + 2*8*i]=
-            nnz_cache[3+8* 7 + 2*8*i]=
-            nnz_cache[3+8*11 + 2*8*i]=
-            nnz_cache[3+8*12 + 2*8*i]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
-        }
-    }
-
-    if( CABAC ) {
-        // top_cbp
-        if(top_type) {
-            h->top_cbp = h->cbp_table[top_xy];
-        } else {
-            h->top_cbp = IS_INTRA(mb_type) ? 0x7CF : 0x00F;
-        }
-        // left_cbp
-        if (left_type[LTOP]) {
-            h->left_cbp =   (h->cbp_table[left_xy[LTOP]] & 0x7F0)
-                        |  ((h->cbp_table[left_xy[LTOP]]>>(left_block[0]&(~1)))&2)
-                        | (((h->cbp_table[left_xy[LBOT]]>>(left_block[2]&(~1)))&2) << 2);
-        } else {
-            h->left_cbp = IS_INTRA(mb_type) ? 0x7CF : 0x00F;
-        }
-    }
-    }
-
-    if(IS_INTER(mb_type) || (IS_DIRECT(mb_type) && h->direct_spatial_mv_pred)){
-        int list;
-        int b_stride = h->b_stride;
-        for(list=0; list<h->list_count; list++){
-            int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
-            int8_t *ref       = s->current_picture.f.ref_index[list];
-            int16_t (*mv_cache)[2] = &h->mv_cache[list][scan8[0]];
-            int16_t (*mv)[2]       = s->current_picture.f.motion_val[list];
-            if(!USES_LIST(mb_type, list)){
-                continue;
-            }
-            assert(!(IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred));
-
-            if(USES_LIST(top_type, list)){
-                const int b_xy= h->mb2b_xy[top_xy] + 3*b_stride;
-                AV_COPY128(mv_cache[0 - 1*8], mv[b_xy + 0]);
-                ref_cache[0 - 1*8]=
-                ref_cache[1 - 1*8]= ref[4*top_xy + 2];
-                ref_cache[2 - 1*8]=
-                ref_cache[3 - 1*8]= ref[4*top_xy + 3];
-            }else{
-                AV_ZERO128(mv_cache[0 - 1*8]);
-                AV_WN32A(&ref_cache[0 - 1*8], ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101);
-            }
-
-            if(mb_type & (MB_TYPE_16x8|MB_TYPE_8x8)){
-            for(i=0; i<2; i++){
-                int cache_idx = -1 + i*2*8;
-                if(USES_LIST(left_type[LEFT(i)], list)){
-                    const int b_xy= h->mb2b_xy[left_xy[LEFT(i)]] + 3;
-                    const int b8_xy= 4*left_xy[LEFT(i)] + 1;
-                    AV_COPY32(mv_cache[cache_idx  ], mv[b_xy + b_stride*left_block[0+i*2]]);
-                    AV_COPY32(mv_cache[cache_idx+8], mv[b_xy + b_stride*left_block[1+i*2]]);
-                    ref_cache[cache_idx  ]= ref[b8_xy + (left_block[0+i*2]&~1)];
-                    ref_cache[cache_idx+8]= ref[b8_xy + (left_block[1+i*2]&~1)];
-                }else{
-                    AV_ZERO32(mv_cache[cache_idx  ]);
-                    AV_ZERO32(mv_cache[cache_idx+8]);
-                    ref_cache[cache_idx  ]=
-                    ref_cache[cache_idx+8]= (left_type[LEFT(i)]) ? LIST_NOT_USED : PART_NOT_AVAILABLE;
-                }
-            }
-            }else{
-                if(USES_LIST(left_type[LTOP], list)){
-                    const int b_xy= h->mb2b_xy[left_xy[LTOP]] + 3;
-                    const int b8_xy= 4*left_xy[LTOP] + 1;
-                    AV_COPY32(mv_cache[-1], mv[b_xy + b_stride*left_block[0]]);
-                    ref_cache[-1]= ref[b8_xy + (left_block[0]&~1)];
-                }else{
-                    AV_ZERO32(mv_cache[-1]);
-                    ref_cache[-1]= left_type[LTOP] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
-                }
-            }
-
-            if(USES_LIST(topright_type, list)){
-                const int b_xy= h->mb2b_xy[topright_xy] + 3*b_stride;
-                AV_COPY32(mv_cache[4 - 1*8], mv[b_xy]);
-                ref_cache[4 - 1*8]= ref[4*topright_xy + 2];
-            }else{
-                AV_ZERO32(mv_cache[4 - 1*8]);
-                ref_cache[4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
-            }
-            if(ref_cache[4 - 1*8] < 0){
-                if(USES_LIST(topleft_type, list)){
-                    const int b_xy = h->mb2b_xy[topleft_xy] + 3 + b_stride + (h->topleft_partition & 2*b_stride);
-                    const int b8_xy= 4*topleft_xy + 1 + (h->topleft_partition & 2);
-                    AV_COPY32(mv_cache[-1 - 1*8], mv[b_xy]);
-                    ref_cache[-1 - 1*8]= ref[b8_xy];
-                }else{
-                    AV_ZERO32(mv_cache[-1 - 1*8]);
-                    ref_cache[-1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
-                }
-            }
-
-            if((mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2)) && !FRAME_MBAFF)
-                continue;
-
-            if(!(mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2))){
-                uint8_t (*mvd_cache)[2] = &h->mvd_cache[list][scan8[0]];
-                uint8_t (*mvd)[2] = h->mvd_table[list];
-                ref_cache[2+8*0] =
-                ref_cache[2+8*2] = PART_NOT_AVAILABLE;
-                AV_ZERO32(mv_cache[2+8*0]);
-                AV_ZERO32(mv_cache[2+8*2]);
-
-                if( CABAC ) {
-                    if(USES_LIST(top_type, list)){
-                        const int b_xy= h->mb2br_xy[top_xy];
-                        AV_COPY64(mvd_cache[0 - 1*8], mvd[b_xy + 0]);
-                    }else{
-                        AV_ZERO64(mvd_cache[0 - 1*8]);
-                    }
-                    if(USES_LIST(left_type[LTOP], list)){
-                        const int b_xy= h->mb2br_xy[left_xy[LTOP]] + 6;
-                        AV_COPY16(mvd_cache[-1 + 0*8], mvd[b_xy - left_block[0]]);
-                        AV_COPY16(mvd_cache[-1 + 1*8], mvd[b_xy - left_block[1]]);
-                    }else{
-                        AV_ZERO16(mvd_cache[-1 + 0*8]);
-                        AV_ZERO16(mvd_cache[-1 + 1*8]);
-                    }
-                    if(USES_LIST(left_type[LBOT], list)){
-                        const int b_xy= h->mb2br_xy[left_xy[LBOT]] + 6;
-                        AV_COPY16(mvd_cache[-1 + 2*8], mvd[b_xy - left_block[2]]);
-                        AV_COPY16(mvd_cache[-1 + 3*8], mvd[b_xy - left_block[3]]);
-                    }else{
-                        AV_ZERO16(mvd_cache[-1 + 2*8]);
-                        AV_ZERO16(mvd_cache[-1 + 3*8]);
-                    }
-                    AV_ZERO16(mvd_cache[2+8*0]);
-                    AV_ZERO16(mvd_cache[2+8*2]);
-                    if(h->slice_type_nos == AV_PICTURE_TYPE_B){
-                        uint8_t *direct_cache = &h->direct_cache[scan8[0]];
-                        uint8_t *direct_table = h->direct_table;
-                        fill_rectangle(direct_cache, 4, 4, 8, MB_TYPE_16x16>>1, 1);
-
-                        if(IS_DIRECT(top_type)){
-                            AV_WN32A(&direct_cache[-1*8], 0x01010101u*(MB_TYPE_DIRECT2>>1));
-                        }else if(IS_8X8(top_type)){
-                            int b8_xy = 4*top_xy;
-                            direct_cache[0 - 1*8]= direct_table[b8_xy + 2];
-                            direct_cache[2 - 1*8]= direct_table[b8_xy + 3];
-                        }else{
-                            AV_WN32A(&direct_cache[-1*8], 0x01010101*(MB_TYPE_16x16>>1));
-                        }
-
-                        if(IS_DIRECT(left_type[LTOP]))
-                            direct_cache[-1 + 0*8]= MB_TYPE_DIRECT2>>1;
-                        else if(IS_8X8(left_type[LTOP]))
-                            direct_cache[-1 + 0*8]= direct_table[4*left_xy[LTOP] + 1 + (left_block[0]&~1)];
-                        else
-                            direct_cache[-1 + 0*8]= MB_TYPE_16x16>>1;
-
-                        if(IS_DIRECT(left_type[LBOT]))
-                            direct_cache[-1 + 2*8]= MB_TYPE_DIRECT2>>1;
-                        else if(IS_8X8(left_type[LBOT]))
-                            direct_cache[-1 + 2*8]= direct_table[4*left_xy[LBOT] + 1 + (left_block[2]&~1)];
-                        else
-                            direct_cache[-1 + 2*8]= MB_TYPE_16x16>>1;
-                    }
-                }
-            }
-            if(FRAME_MBAFF){
-#define MAP_MVS\
-                    MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
-                    MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
-                    MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
-                    MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
-                    MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
-                    MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
-                    MAP_F2F(scan8[0] - 1 + 0*8, left_type[LTOP])\
-                    MAP_F2F(scan8[0] - 1 + 1*8, left_type[LTOP])\
-                    MAP_F2F(scan8[0] - 1 + 2*8, left_type[LBOT])\
-                    MAP_F2F(scan8[0] - 1 + 3*8, left_type[LBOT])
-                if(MB_FIELD){
-#define MAP_F2F(idx, mb_type)\
-                    if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
-                        h->ref_cache[list][idx] <<= 1;\
-                        h->mv_cache[list][idx][1] /= 2;\
-                        h->mvd_cache[list][idx][1] >>=1;\
-                    }
-                    MAP_MVS
-#undef MAP_F2F
-                }else{
-#define MAP_F2F(idx, mb_type)\
-                    if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
-                        h->ref_cache[list][idx] >>= 1;\
-                        h->mv_cache[list][idx][1] <<= 1;\
-                        h->mvd_cache[list][idx][1] <<= 1;\
-                    }
-                    MAP_MVS
-#undef MAP_F2F
-                }
-            }
-        }
-    }
-
-        h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[LTOP]);
-}
-
 /**
  * gets the predicted intra4x4 prediction mode.
  */
diff --git a/libavcodec/h264_mvpred.h b/libavcodec/h264_mvpred.h
index 52c032337a..4751928211 100644
--- a/libavcodec/h264_mvpred.h
+++ b/libavcodec/h264_mvpred.h
@@ -327,6 +327,424 @@ zeromv:
     return;
 }
 
+static void fill_decode_neighbors(H264Context *h, int mb_type){
+    MpegEncContext * const s = &h->s;
+    const int mb_xy= h->mb_xy;
+    int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];
+    static const uint8_t left_block_options[4][32]={
+        {0,1,2,3,7,10,8,11,3+0*4, 3+1*4, 3+2*4, 3+3*4, 1+4*4, 1+8*4, 1+5*4, 1+9*4},
+        {2,2,3,3,8,11,8,11,3+2*4, 3+2*4, 3+3*4, 3+3*4, 1+5*4, 1+9*4, 1+5*4, 1+9*4},
+        {0,0,1,1,7,10,7,10,3+0*4, 3+0*4, 3+1*4, 3+1*4, 1+4*4, 1+8*4, 1+4*4, 1+8*4},
+        {0,2,0,2,7,10,7,10,3+0*4, 3+2*4, 3+0*4, 3+2*4, 1+4*4, 1+8*4, 1+4*4, 1+8*4}
+    };
+
+    h->topleft_partition= -1;
+
+    top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
+
+    /* Wow, what a mess, why didn't they simplify the interlacing & intra
+     * stuff, I can't imagine that these complex rules are worth it. */
+
+    topleft_xy = top_xy - 1;
+    topright_xy= top_xy + 1;
+    left_xy[LBOT] = left_xy[LTOP] = mb_xy-1;
+    h->left_block = left_block_options[0];
+    if(FRAME_MBAFF){
+        const int left_mb_field_flag = IS_INTERLACED(s->current_picture.f.mb_type[mb_xy - 1]);
+        const int curr_mb_field_flag = IS_INTERLACED(mb_type);
+        if(s->mb_y&1){
+            if (left_mb_field_flag != curr_mb_field_flag) {
+                left_xy[LBOT] = left_xy[LTOP] = mb_xy - s->mb_stride - 1;
+                if (curr_mb_field_flag) {
+                    left_xy[LBOT] += s->mb_stride;
+                    h->left_block = left_block_options[3];
+                } else {
+                    topleft_xy += s->mb_stride;
+                    // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
+                    h->topleft_partition = 0;
+                    h->left_block = left_block_options[1];
+                }
+            }
+        }else{
+            if(curr_mb_field_flag){
+                topleft_xy  += s->mb_stride & (((s->current_picture.f.mb_type[top_xy - 1] >> 7) & 1) - 1);
+                topright_xy += s->mb_stride & (((s->current_picture.f.mb_type[top_xy + 1] >> 7) & 1) - 1);
+                top_xy      += s->mb_stride & (((s->current_picture.f.mb_type[top_xy    ] >> 7) & 1) - 1);
+            }
+            if (left_mb_field_flag != curr_mb_field_flag) {
+                if (curr_mb_field_flag) {
+                    left_xy[LBOT] += s->mb_stride;
+                    h->left_block = left_block_options[3];
+                } else {
+                    h->left_block = left_block_options[2];
+                }
+            }
+        }
+    }
+
+    h->topleft_mb_xy = topleft_xy;
+    h->top_mb_xy     = top_xy;
+    h->topright_mb_xy= topright_xy;
+    h->left_mb_xy[LTOP] = left_xy[LTOP];
+    h->left_mb_xy[LBOT] = left_xy[LBOT];
+    //FIXME do we need all in the context?
+
+    h->topleft_type    = s->current_picture.f.mb_type[topleft_xy];
+    h->top_type        = s->current_picture.f.mb_type[top_xy];
+    h->topright_type   = s->current_picture.f.mb_type[topright_xy];
+    h->left_type[LTOP] = s->current_picture.f.mb_type[left_xy[LTOP]];
+    h->left_type[LBOT] = s->current_picture.f.mb_type[left_xy[LBOT]];
+
+    if(FMO){
+    if(h->slice_table[topleft_xy    ] != h->slice_num) h->topleft_type = 0;
+    if(h->slice_table[top_xy        ] != h->slice_num) h->top_type     = 0;
+    if(h->slice_table[left_xy[LTOP] ] != h->slice_num) h->left_type[LTOP] = h->left_type[LBOT] = 0;
+    }else{
+        if(h->slice_table[topleft_xy ] != h->slice_num){
+            h->topleft_type = 0;
+            if(h->slice_table[top_xy        ] != h->slice_num) h->top_type     = 0;
+            if(h->slice_table[left_xy[LTOP] ] != h->slice_num) h->left_type[LTOP] = h->left_type[LBOT] = 0;
+        }
+    }
+    if(h->slice_table[topright_xy] != h->slice_num) h->topright_type= 0;
+}
+
+static void fill_decode_caches(H264Context *h, int mb_type){
+    MpegEncContext * const s = &h->s;
+    int topleft_xy, top_xy, topright_xy, left_xy[LEFT_MBS];
+    int topleft_type, top_type, topright_type, left_type[LEFT_MBS];
+    const uint8_t * left_block= h->left_block;
+    int i;
+    uint8_t *nnz;
+    uint8_t *nnz_cache;
+
+    topleft_xy     = h->topleft_mb_xy;
+    top_xy         = h->top_mb_xy;
+    topright_xy    = h->topright_mb_xy;
+    left_xy[LTOP]  = h->left_mb_xy[LTOP];
+    left_xy[LBOT]  = h->left_mb_xy[LBOT];
+    topleft_type   = h->topleft_type;
+    top_type       = h->top_type;
+    topright_type  = h->topright_type;
+    left_type[LTOP]= h->left_type[LTOP];
+    left_type[LBOT]= h->left_type[LBOT];
+
+    if(!IS_SKIP(mb_type)){
+        if(IS_INTRA(mb_type)){
+            int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
+            h->topleft_samples_available=
+            h->top_samples_available=
+            h->left_samples_available= 0xFFFF;
+            h->topright_samples_available= 0xEEEA;
+
+            if(!(top_type & type_mask)){
+                h->topleft_samples_available= 0xB3FF;
+                h->top_samples_available= 0x33FF;
+                h->topright_samples_available= 0x26EA;
+            }
+            if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[LTOP])){
+                if(IS_INTERLACED(mb_type)){
+                    if(!(left_type[LTOP] & type_mask)){
+                        h->topleft_samples_available&= 0xDFFF;
+                        h->left_samples_available&= 0x5FFF;
+                    }
+                    if(!(left_type[LBOT] & type_mask)){
+                        h->topleft_samples_available&= 0xFF5F;
+                        h->left_samples_available&= 0xFF5F;
+                    }
+                }else{
+                    int left_typei = s->current_picture.f.mb_type[left_xy[LTOP] + s->mb_stride];
+
+                    assert(left_xy[LTOP] == left_xy[LBOT]);
+                    if(!((left_typei & type_mask) && (left_type[LTOP] & type_mask))){
+                        h->topleft_samples_available&= 0xDF5F;
+                        h->left_samples_available&= 0x5F5F;
+                    }
+                }
+            }else{
+                if(!(left_type[LTOP] & type_mask)){
+                    h->topleft_samples_available&= 0xDF5F;
+                    h->left_samples_available&= 0x5F5F;
+                }
+            }
+
+            if(!(topleft_type & type_mask))
+                h->topleft_samples_available&= 0x7FFF;
+
+            if(!(topright_type & type_mask))
+                h->topright_samples_available&= 0xFBFF;
+
+            if(IS_INTRA4x4(mb_type)){
+                if(IS_INTRA4x4(top_type)){
+                    AV_COPY32(h->intra4x4_pred_mode_cache+4+8*0, h->intra4x4_pred_mode + h->mb2br_xy[top_xy]);
+                }else{
+                    h->intra4x4_pred_mode_cache[4+8*0]=
+                    h->intra4x4_pred_mode_cache[5+8*0]=
+                    h->intra4x4_pred_mode_cache[6+8*0]=
+                    h->intra4x4_pred_mode_cache[7+8*0]= 2 - 3*!(top_type & type_mask);
+                }
+                for(i=0; i<2; i++){
+                    if(IS_INTRA4x4(left_type[LEFT(i)])){
+                        int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[left_xy[LEFT(i)]];
+                        h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= mode[6-left_block[0+2*i]];
+                        h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= mode[6-left_block[1+2*i]];
+                    }else{
+                        h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
+                        h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= 2 - 3*!(left_type[LEFT(i)] & type_mask);
+                    }
+                }
+            }
+        }
+
+
+/*
+0 . T T. T T T T
+1 L . .L . . . .
+2 L . .L . . . .
+3 . T TL . . . .
+4 L . .L . . . .
+5 L . .. . . . .
+*/
+//FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
+    nnz_cache = h->non_zero_count_cache;
+    if(top_type){
+        nnz = h->non_zero_count[top_xy];
+        AV_COPY32(&nnz_cache[4+8* 0], &nnz[4*3]);
+        if(CHROMA444){
+            AV_COPY32(&nnz_cache[4+8* 5], &nnz[4* 7]);
+            AV_COPY32(&nnz_cache[4+8*10], &nnz[4*11]);
+        }else{
+            AV_COPY32(&nnz_cache[4+8* 5], &nnz[4* 5]);
+            AV_COPY32(&nnz_cache[4+8*10], &nnz[4* 9]);
+        }
+    }else{
+        uint32_t top_empty = CABAC && !IS_INTRA(mb_type) ? 0 : 0x40404040;
+        AV_WN32A(&nnz_cache[4+8* 0], top_empty);
+        AV_WN32A(&nnz_cache[4+8* 5], top_empty);
+        AV_WN32A(&nnz_cache[4+8*10], top_empty);
+    }
+
+    for (i=0; i<2; i++) {
+        if(left_type[LEFT(i)]){
+            nnz = h->non_zero_count[left_xy[LEFT(i)]];
+            nnz_cache[3+8* 1 + 2*8*i]= nnz[left_block[8+0+2*i]];
+            nnz_cache[3+8* 2 + 2*8*i]= nnz[left_block[8+1+2*i]];
+            if(CHROMA444){
+                nnz_cache[3+8* 6 + 2*8*i]= nnz[left_block[8+0+2*i]+4*4];
+                nnz_cache[3+8* 7 + 2*8*i]= nnz[left_block[8+1+2*i]+4*4];
+                nnz_cache[3+8*11 + 2*8*i]= nnz[left_block[8+0+2*i]+8*4];
+                nnz_cache[3+8*12 + 2*8*i]= nnz[left_block[8+1+2*i]+8*4];
+            }else{
+                nnz_cache[3+8* 6 +   8*i]= nnz[left_block[8+4+2*i]];
+                nnz_cache[3+8*11 +   8*i]= nnz[left_block[8+5+2*i]];
+            }
+        }else{
+            nnz_cache[3+8* 1 + 2*8*i]=
+            nnz_cache[3+8* 2 + 2*8*i]=
+            nnz_cache[3+8* 6 + 2*8*i]=
+            nnz_cache[3+8* 7 + 2*8*i]=
+            nnz_cache[3+8*11 + 2*8*i]=
+            nnz_cache[3+8*12 + 2*8*i]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
+        }
+    }
+
+    if( CABAC ) {
+        // top_cbp
+        if(top_type) {
+            h->top_cbp = h->cbp_table[top_xy];
+        } else {
+            h->top_cbp = IS_INTRA(mb_type) ? 0x7CF : 0x00F;
+        }
+        // left_cbp
+        if (left_type[LTOP]) {
+            h->left_cbp =   (h->cbp_table[left_xy[LTOP]] & 0x7F0)
+                        |  ((h->cbp_table[left_xy[LTOP]]>>(left_block[0]&(~1)))&2)
+                        | (((h->cbp_table[left_xy[LBOT]]>>(left_block[2]&(~1)))&2) << 2);
+        } else {
+            h->left_cbp = IS_INTRA(mb_type) ? 0x7CF : 0x00F;
+        }
+    }
+    }
+
+    if(IS_INTER(mb_type) || (IS_DIRECT(mb_type) && h->direct_spatial_mv_pred)){
+        int list;
+        int b_stride = h->b_stride;
+        for(list=0; list<h->list_count; list++){
+            int8_t *ref_cache = &h->ref_cache[list][scan8[0]];
+            int8_t *ref       = s->current_picture.f.ref_index[list];
+            int16_t (*mv_cache)[2] = &h->mv_cache[list][scan8[0]];
+            int16_t (*mv)[2]       = s->current_picture.f.motion_val[list];
+            if(!USES_LIST(mb_type, list)){
+                continue;
+            }
+            assert(!(IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred));
+
+            if(USES_LIST(top_type, list)){
+                const int b_xy= h->mb2b_xy[top_xy] + 3*b_stride;
+                AV_COPY128(mv_cache[0 - 1*8], mv[b_xy + 0]);
+                ref_cache[0 - 1*8]=
+                ref_cache[1 - 1*8]= ref[4*top_xy + 2];
+                ref_cache[2 - 1*8]=
+                ref_cache[3 - 1*8]= ref[4*top_xy + 3];
+            }else{
+                AV_ZERO128(mv_cache[0 - 1*8]);
+                AV_WN32A(&ref_cache[0 - 1*8], ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101);
+            }
+
+            if(mb_type & (MB_TYPE_16x8|MB_TYPE_8x8)){
+            for(i=0; i<2; i++){
+                int cache_idx = -1 + i*2*8;
+                if(USES_LIST(left_type[LEFT(i)], list)){
+                    const int b_xy= h->mb2b_xy[left_xy[LEFT(i)]] + 3;
+                    const int b8_xy= 4*left_xy[LEFT(i)] + 1;
+                    AV_COPY32(mv_cache[cache_idx  ], mv[b_xy + b_stride*left_block[0+i*2]]);
+                    AV_COPY32(mv_cache[cache_idx+8], mv[b_xy + b_stride*left_block[1+i*2]]);
+                    ref_cache[cache_idx  ]= ref[b8_xy + (left_block[0+i*2]&~1)];
+                    ref_cache[cache_idx+8]= ref[b8_xy + (left_block[1+i*2]&~1)];
+                }else{
+                    AV_ZERO32(mv_cache[cache_idx  ]);
+                    AV_ZERO32(mv_cache[cache_idx+8]);
+                    ref_cache[cache_idx  ]=
+                    ref_cache[cache_idx+8]= (left_type[LEFT(i)]) ? LIST_NOT_USED : PART_NOT_AVAILABLE;
+                }
+            }
+            }else{
+                if(USES_LIST(left_type[LTOP], list)){
+                    const int b_xy= h->mb2b_xy[left_xy[LTOP]] + 3;
+                    const int b8_xy= 4*left_xy[LTOP] + 1;
+                    AV_COPY32(mv_cache[-1], mv[b_xy + b_stride*left_block[0]]);
+                    ref_cache[-1]= ref[b8_xy + (left_block[0]&~1)];
+                }else{
+                    AV_ZERO32(mv_cache[-1]);
+                    ref_cache[-1]= left_type[LTOP] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
+                }
+            }
+
+            if(USES_LIST(topright_type, list)){
+                const int b_xy= h->mb2b_xy[topright_xy] + 3*b_stride;
+                AV_COPY32(mv_cache[4 - 1*8], mv[b_xy]);
+                ref_cache[4 - 1*8]= ref[4*topright_xy + 2];
+            }else{
+                AV_ZERO32(mv_cache[4 - 1*8]);
+                ref_cache[4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
+            }
+            if(ref_cache[4 - 1*8] < 0){
+                if(USES_LIST(topleft_type, list)){
+                    const int b_xy = h->mb2b_xy[topleft_xy] + 3 + b_stride + (h->topleft_partition & 2*b_stride);
+                    const int b8_xy= 4*topleft_xy + 1 + (h->topleft_partition & 2);
+                    AV_COPY32(mv_cache[-1 - 1*8], mv[b_xy]);
+                    ref_cache[-1 - 1*8]= ref[b8_xy];
+                }else{
+                    AV_ZERO32(mv_cache[-1 - 1*8]);
+                    ref_cache[-1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
+                }
+            }
+
+            if((mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2)) && !FRAME_MBAFF)
+                continue;
+
+            if(!(mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2))){
+                uint8_t (*mvd_cache)[2] = &h->mvd_cache[list][scan8[0]];
+                uint8_t (*mvd)[2] = h->mvd_table[list];
+                ref_cache[2+8*0] =
+                ref_cache[2+8*2] = PART_NOT_AVAILABLE;
+                AV_ZERO32(mv_cache[2+8*0]);
+                AV_ZERO32(mv_cache[2+8*2]);
+
+                if( CABAC ) {
+                    if(USES_LIST(top_type, list)){
+                        const int b_xy= h->mb2br_xy[top_xy];
+                        AV_COPY64(mvd_cache[0 - 1*8], mvd[b_xy + 0]);
+                    }else{
+                        AV_ZERO64(mvd_cache[0 - 1*8]);
+                    }
+                    if(USES_LIST(left_type[LTOP], list)){
+                        const int b_xy= h->mb2br_xy[left_xy[LTOP]] + 6;
+                        AV_COPY16(mvd_cache[-1 + 0*8], mvd[b_xy - left_block[0]]);
+                        AV_COPY16(mvd_cache[-1 + 1*8], mvd[b_xy - left_block[1]]);
+                    }else{
+                        AV_ZERO16(mvd_cache[-1 + 0*8]);
+                        AV_ZERO16(mvd_cache[-1 + 1*8]);
+                    }
+                    if(USES_LIST(left_type[LBOT], list)){
+                        const int b_xy= h->mb2br_xy[left_xy[LBOT]] + 6;
+                        AV_COPY16(mvd_cache[-1 + 2*8], mvd[b_xy - left_block[2]]);
+                        AV_COPY16(mvd_cache[-1 + 3*8], mvd[b_xy - left_block[3]]);
+                    }else{
+                        AV_ZERO16(mvd_cache[-1 + 2*8]);
+                        AV_ZERO16(mvd_cache[-1 + 3*8]);
+                    }
+                    AV_ZERO16(mvd_cache[2+8*0]);
+                    AV_ZERO16(mvd_cache[2+8*2]);
+                    if(h->slice_type_nos == AV_PICTURE_TYPE_B){
+                        uint8_t *direct_cache = &h->direct_cache[scan8[0]];
+                        uint8_t *direct_table = h->direct_table;
+                        fill_rectangle(direct_cache, 4, 4, 8, MB_TYPE_16x16>>1, 1);
+
+                        if(IS_DIRECT(top_type)){
+                            AV_WN32A(&direct_cache[-1*8], 0x01010101u*(MB_TYPE_DIRECT2>>1));
+                        }else if(IS_8X8(top_type)){
+                            int b8_xy = 4*top_xy;
+                            direct_cache[0 - 1*8]= direct_table[b8_xy + 2];
+                            direct_cache[2 - 1*8]= direct_table[b8_xy + 3];
+                        }else{
+                            AV_WN32A(&direct_cache[-1*8], 0x01010101*(MB_TYPE_16x16>>1));
+                        }
+
+                        if(IS_DIRECT(left_type[LTOP]))
+                            direct_cache[-1 + 0*8]= MB_TYPE_DIRECT2>>1;
+                        else if(IS_8X8(left_type[LTOP]))
+                            direct_cache[-1 + 0*8]= direct_table[4*left_xy[LTOP] + 1 + (left_block[0]&~1)];
+                        else
+                            direct_cache[-1 + 0*8]= MB_TYPE_16x16>>1;
+
+                        if(IS_DIRECT(left_type[LBOT]))
+                            direct_cache[-1 + 2*8]= MB_TYPE_DIRECT2>>1;
+                        else if(IS_8X8(left_type[LBOT]))
+                            direct_cache[-1 + 2*8]= direct_table[4*left_xy[LBOT] + 1 + (left_block[2]&~1)];
+                        else
+                            direct_cache[-1 + 2*8]= MB_TYPE_16x16>>1;
+                    }
+                }
+            }
+            if(FRAME_MBAFF){
+#define MAP_MVS\
+                    MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
+                    MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
+                    MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
+                    MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
+                    MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
+                    MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
+                    MAP_F2F(scan8[0] - 1 + 0*8, left_type[LTOP])\
+                    MAP_F2F(scan8[0] - 1 + 1*8, left_type[LTOP])\
+                    MAP_F2F(scan8[0] - 1 + 2*8, left_type[LBOT])\
+                    MAP_F2F(scan8[0] - 1 + 3*8, left_type[LBOT])
+                if(MB_FIELD){
+#define MAP_F2F(idx, mb_type)\
+                    if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
+                        h->ref_cache[list][idx] <<= 1;\
+                        h->mv_cache[list][idx][1] /= 2;\
+                        h->mvd_cache[list][idx][1] >>=1;\
+                    }
+                    MAP_MVS
+#undef MAP_F2F
+                }else{
+#define MAP_F2F(idx, mb_type)\
+                    if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
+                        h->ref_cache[list][idx] >>= 1;\
+                        h->mv_cache[list][idx][1] <<= 1;\
+                        h->mvd_cache[list][idx][1] <<= 1;\
+                    }
+                    MAP_MVS
+#undef MAP_F2F
+                }
+            }
+        }
+    }
+
+        h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[LTOP]);
+}
+
 /**
  * decodes a P_SKIP or B_SKIP macroblock
  */