a4d2a13391c72d474589660e043c6d2ab9facd32
[ffmpeg.git] / libavcodec / h264.c
1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 /**
23  * @file h264.c
24  * H.264 / AVC / MPEG4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27
28 #include "dsputil.h"
29 #include "avcodec.h"
30 #include "mpegvideo.h"
31 #include "h264.h"
32 #include "h264data.h"
33 #include "h264_parser.h"
34 #include "golomb.h"
35
36 #include "cabac.h"
37
38 //#undef NDEBUG
39 #include <assert.h>
40
41 static VLC coeff_token_vlc[4];
42 static VLC chroma_dc_coeff_token_vlc;
43
44 static VLC total_zeros_vlc[15];
45 static VLC chroma_dc_total_zeros_vlc[3];
46
47 static VLC run_vlc[6];
48 static VLC run7_vlc;
49
50 static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
51 static void svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
52 static void filter_mb( 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);
53 static void filter_mb_fast( 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);
54
55 static av_always_inline uint32_t pack16to32(int a, int b){
56 #ifdef WORDS_BIGENDIAN
57    return (b&0xFFFF) + (a<<16);
58 #else
59    return (a&0xFFFF) + (b<<16);
60 #endif
61 }
62
63 const uint8_t ff_rem6[52]={
64 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
65 };
66
67 const uint8_t ff_div6[52]={
68 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
69 };
70
71
72 /**
73  * fill a rectangle.
74  * @param h height of the rectangle, should be a constant
75  * @param w width of the rectangle, should be a constant
76  * @param size the size of val (1 or 4), should be a constant
77  */
78 static av_always_inline void fill_rectangle(void *vp, int w, int h, int stride, uint32_t val, int size){
79     uint8_t *p= (uint8_t*)vp;
80     assert(size==1 || size==4);
81     assert(w<=4);
82
83     w      *= size;
84     stride *= size;
85
86     assert((((long)vp)&(FFMIN(w, STRIDE_ALIGN)-1)) == 0);
87     assert((stride&(w-1))==0);
88     if(w==2){
89         const uint16_t v= size==4 ? val : val*0x0101;
90         *(uint16_t*)(p + 0*stride)= v;
91         if(h==1) return;
92         *(uint16_t*)(p + 1*stride)= v;
93         if(h==2) return;
94         *(uint16_t*)(p + 2*stride)= v;
95         *(uint16_t*)(p + 3*stride)= v;
96     }else if(w==4){
97         const uint32_t v= size==4 ? val : val*0x01010101;
98         *(uint32_t*)(p + 0*stride)= v;
99         if(h==1) return;
100         *(uint32_t*)(p + 1*stride)= v;
101         if(h==2) return;
102         *(uint32_t*)(p + 2*stride)= v;
103         *(uint32_t*)(p + 3*stride)= v;
104     }else if(w==8){
105     //gcc can't optimize 64bit math on x86_32
106 #if defined(ARCH_X86_64) || (defined(MP_WORDSIZE) && MP_WORDSIZE >= 64)
107         const uint64_t v= val*0x0100000001ULL;
108         *(uint64_t*)(p + 0*stride)= v;
109         if(h==1) return;
110         *(uint64_t*)(p + 1*stride)= v;
111         if(h==2) return;
112         *(uint64_t*)(p + 2*stride)= v;
113         *(uint64_t*)(p + 3*stride)= v;
114     }else if(w==16){
115         const uint64_t v= val*0x0100000001ULL;
116         *(uint64_t*)(p + 0+0*stride)= v;
117         *(uint64_t*)(p + 8+0*stride)= v;
118         *(uint64_t*)(p + 0+1*stride)= v;
119         *(uint64_t*)(p + 8+1*stride)= v;
120         if(h==2) return;
121         *(uint64_t*)(p + 0+2*stride)= v;
122         *(uint64_t*)(p + 8+2*stride)= v;
123         *(uint64_t*)(p + 0+3*stride)= v;
124         *(uint64_t*)(p + 8+3*stride)= v;
125 #else
126         *(uint32_t*)(p + 0+0*stride)= val;
127         *(uint32_t*)(p + 4+0*stride)= val;
128         if(h==1) return;
129         *(uint32_t*)(p + 0+1*stride)= val;
130         *(uint32_t*)(p + 4+1*stride)= val;
131         if(h==2) return;
132         *(uint32_t*)(p + 0+2*stride)= val;
133         *(uint32_t*)(p + 4+2*stride)= val;
134         *(uint32_t*)(p + 0+3*stride)= val;
135         *(uint32_t*)(p + 4+3*stride)= val;
136     }else if(w==16){
137         *(uint32_t*)(p + 0+0*stride)= val;
138         *(uint32_t*)(p + 4+0*stride)= val;
139         *(uint32_t*)(p + 8+0*stride)= val;
140         *(uint32_t*)(p +12+0*stride)= val;
141         *(uint32_t*)(p + 0+1*stride)= val;
142         *(uint32_t*)(p + 4+1*stride)= val;
143         *(uint32_t*)(p + 8+1*stride)= val;
144         *(uint32_t*)(p +12+1*stride)= val;
145         if(h==2) return;
146         *(uint32_t*)(p + 0+2*stride)= val;
147         *(uint32_t*)(p + 4+2*stride)= val;
148         *(uint32_t*)(p + 8+2*stride)= val;
149         *(uint32_t*)(p +12+2*stride)= val;
150         *(uint32_t*)(p + 0+3*stride)= val;
151         *(uint32_t*)(p + 4+3*stride)= val;
152         *(uint32_t*)(p + 8+3*stride)= val;
153         *(uint32_t*)(p +12+3*stride)= val;
154 #endif
155     }else
156         assert(0);
157     assert(h==4);
158 }
159
160 static void fill_caches(H264Context *h, int mb_type, int for_deblock){
161     MpegEncContext * const s = &h->s;
162     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
163     int topleft_xy, top_xy, topright_xy, left_xy[2];
164     int topleft_type, top_type, topright_type, left_type[2];
165     int left_block[8];
166     int i;
167
168     //FIXME deblocking could skip the intra and nnz parts.
169     if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[mb_xy-s->mb_stride]) && !FRAME_MBAFF)
170         return;
171
172     //wow what a mess, why didn't they simplify the interlacing&intra stuff, i can't imagine that these complex rules are worth it
173
174     top_xy     = mb_xy  - s->mb_stride;
175     topleft_xy = top_xy - 1;
176     topright_xy= top_xy + 1;
177     left_xy[1] = left_xy[0] = mb_xy-1;
178     left_block[0]= 0;
179     left_block[1]= 1;
180     left_block[2]= 2;
181     left_block[3]= 3;
182     left_block[4]= 7;
183     left_block[5]= 10;
184     left_block[6]= 8;
185     left_block[7]= 11;
186     if(FRAME_MBAFF){
187         const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
188         const int top_pair_xy      = pair_xy     - s->mb_stride;
189         const int topleft_pair_xy  = top_pair_xy - 1;
190         const int topright_pair_xy = top_pair_xy + 1;
191         const int topleft_mb_frame_flag  = !IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
192         const int top_mb_frame_flag      = !IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
193         const int topright_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
194         const int left_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
195         const int curr_mb_frame_flag = !IS_INTERLACED(mb_type);
196         const int bottom = (s->mb_y & 1);
197         tprintf(s->avctx, "fill_caches: curr_mb_frame_flag:%d, left_mb_frame_flag:%d, topleft_mb_frame_flag:%d, top_mb_frame_flag:%d, topright_mb_frame_flag:%d\n", curr_mb_frame_flag, left_mb_frame_flag, topleft_mb_frame_flag, top_mb_frame_flag, topright_mb_frame_flag);
198         if (bottom
199                 ? !curr_mb_frame_flag // bottom macroblock
200                 : (!curr_mb_frame_flag && !top_mb_frame_flag) // top macroblock
201                 ) {
202             top_xy -= s->mb_stride;
203         }
204         if (bottom
205                 ? !curr_mb_frame_flag // bottom macroblock
206                 : (!curr_mb_frame_flag && !topleft_mb_frame_flag) // top macroblock
207                 ) {
208             topleft_xy -= s->mb_stride;
209         }
210         if (bottom
211                 ? !curr_mb_frame_flag // bottom macroblock
212                 : (!curr_mb_frame_flag && !topright_mb_frame_flag) // top macroblock
213                 ) {
214             topright_xy -= s->mb_stride;
215         }
216         if (left_mb_frame_flag != curr_mb_frame_flag) {
217             left_xy[1] = left_xy[0] = pair_xy - 1;
218             if (curr_mb_frame_flag) {
219                 if (bottom) {
220                     left_block[0]= 2;
221                     left_block[1]= 2;
222                     left_block[2]= 3;
223                     left_block[3]= 3;
224                     left_block[4]= 8;
225                     left_block[5]= 11;
226                     left_block[6]= 8;
227                     left_block[7]= 11;
228                 } else {
229                     left_block[0]= 0;
230                     left_block[1]= 0;
231                     left_block[2]= 1;
232                     left_block[3]= 1;
233                     left_block[4]= 7;
234                     left_block[5]= 10;
235                     left_block[6]= 7;
236                     left_block[7]= 10;
237                 }
238             } else {
239                 left_xy[1] += s->mb_stride;
240                 //left_block[0]= 0;
241                 left_block[1]= 2;
242                 left_block[2]= 0;
243                 left_block[3]= 2;
244                 //left_block[4]= 7;
245                 left_block[5]= 10;
246                 left_block[6]= 7;
247                 left_block[7]= 10;
248             }
249         }
250     }
251
252     h->top_mb_xy = top_xy;
253     h->left_mb_xy[0] = left_xy[0];
254     h->left_mb_xy[1] = left_xy[1];
255     if(for_deblock){
256         topleft_type = 0;
257         topright_type = 0;
258         top_type     = h->slice_table[top_xy     ] < 255 ? s->current_picture.mb_type[top_xy]     : 0;
259         left_type[0] = h->slice_table[left_xy[0] ] < 255 ? s->current_picture.mb_type[left_xy[0]] : 0;
260         left_type[1] = h->slice_table[left_xy[1] ] < 255 ? s->current_picture.mb_type[left_xy[1]] : 0;
261
262         if(FRAME_MBAFF && !IS_INTRA(mb_type)){
263             int list;
264             int v = *(uint16_t*)&h->non_zero_count[mb_xy][14];
265             for(i=0; i<16; i++)
266                 h->non_zero_count_cache[scan8[i]] = (v>>i)&1;
267             for(list=0; list<h->list_count; list++){
268                 if(USES_LIST(mb_type,list)){
269                     uint32_t *src = (uint32_t*)s->current_picture.motion_val[list][h->mb2b_xy[mb_xy]];
270                     uint32_t *dst = (uint32_t*)h->mv_cache[list][scan8[0]];
271                     int8_t *ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
272                     for(i=0; i<4; i++, dst+=8, src+=h->b_stride){
273                         dst[0] = src[0];
274                         dst[1] = src[1];
275                         dst[2] = src[2];
276                         dst[3] = src[3];
277                     }
278                     *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
279                     *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = pack16to32(ref[0],ref[1])*0x0101;
280                     ref += h->b8_stride;
281                     *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
282                     *(uint32_t*)&h->ref_cache[list][scan8[10]] = pack16to32(ref[0],ref[1])*0x0101;
283                 }else{
284                     fill_rectangle(&h-> mv_cache[list][scan8[ 0]], 4, 4, 8, 0, 4);
285                     fill_rectangle(&h->ref_cache[list][scan8[ 0]], 4, 4, 8, (uint8_t)LIST_NOT_USED, 1);
286                 }
287             }
288         }
289     }else{
290         topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
291         top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
292         topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
293         left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
294         left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
295     }
296
297     if(IS_INTRA(mb_type)){
298         h->topleft_samples_available=
299         h->top_samples_available=
300         h->left_samples_available= 0xFFFF;
301         h->topright_samples_available= 0xEEEA;
302
303         if(!IS_INTRA(top_type) && (top_type==0 || h->pps.constrained_intra_pred)){
304             h->topleft_samples_available= 0xB3FF;
305             h->top_samples_available= 0x33FF;
306             h->topright_samples_available= 0x26EA;
307         }
308         for(i=0; i<2; i++){
309             if(!IS_INTRA(left_type[i]) && (left_type[i]==0 || h->pps.constrained_intra_pred)){
310                 h->topleft_samples_available&= 0xDF5F;
311                 h->left_samples_available&= 0x5F5F;
312             }
313         }
314
315         if(!IS_INTRA(topleft_type) && (topleft_type==0 || h->pps.constrained_intra_pred))
316             h->topleft_samples_available&= 0x7FFF;
317
318         if(!IS_INTRA(topright_type) && (topright_type==0 || h->pps.constrained_intra_pred))
319             h->topright_samples_available&= 0xFBFF;
320
321         if(IS_INTRA4x4(mb_type)){
322             if(IS_INTRA4x4(top_type)){
323                 h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
324                 h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
325                 h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
326                 h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
327             }else{
328                 int pred;
329                 if(!top_type || (IS_INTER(top_type) && h->pps.constrained_intra_pred))
330                     pred= -1;
331                 else{
332                     pred= 2;
333                 }
334                 h->intra4x4_pred_mode_cache[4+8*0]=
335                 h->intra4x4_pred_mode_cache[5+8*0]=
336                 h->intra4x4_pred_mode_cache[6+8*0]=
337                 h->intra4x4_pred_mode_cache[7+8*0]= pred;
338             }
339             for(i=0; i<2; i++){
340                 if(IS_INTRA4x4(left_type[i])){
341                     h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
342                     h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
343                 }else{
344                     int pred;
345                     if(!left_type[i] || (IS_INTER(left_type[i]) && h->pps.constrained_intra_pred))
346                         pred= -1;
347                     else{
348                         pred= 2;
349                     }
350                     h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
351                     h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
352                 }
353             }
354         }
355     }
356
357
358 /*
359 0 . T T. T T T T
360 1 L . .L . . . .
361 2 L . .L . . . .
362 3 . T TL . . . .
363 4 L . .L . . . .
364 5 L . .. . . . .
365 */
366 //FIXME constraint_intra_pred & partitioning & nnz (lets hope this is just a typo in the spec)
367     if(top_type){
368         h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
369         h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
370         h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
371         h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
372
373         h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
374         h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
375
376         h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
377         h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
378
379     }else{
380         h->non_zero_count_cache[4+8*0]=
381         h->non_zero_count_cache[5+8*0]=
382         h->non_zero_count_cache[6+8*0]=
383         h->non_zero_count_cache[7+8*0]=
384
385         h->non_zero_count_cache[1+8*0]=
386         h->non_zero_count_cache[2+8*0]=
387
388         h->non_zero_count_cache[1+8*3]=
389         h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
390
391     }
392
393     for (i=0; i<2; i++) {
394         if(left_type[i]){
395             h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
396             h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
397             h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
398             h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
399         }else{
400             h->non_zero_count_cache[3+8*1 + 2*8*i]=
401             h->non_zero_count_cache[3+8*2 + 2*8*i]=
402             h->non_zero_count_cache[0+8*1 +   8*i]=
403             h->non_zero_count_cache[0+8*4 +   8*i]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
404         }
405     }
406
407     if( h->pps.cabac ) {
408         // top_cbp
409         if(top_type) {
410             h->top_cbp = h->cbp_table[top_xy];
411         } else if(IS_INTRA(mb_type)) {
412             h->top_cbp = 0x1C0;
413         } else {
414             h->top_cbp = 0;
415         }
416         // left_cbp
417         if (left_type[0]) {
418             h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
419         } else if(IS_INTRA(mb_type)) {
420             h->left_cbp = 0x1C0;
421         } else {
422             h->left_cbp = 0;
423         }
424         if (left_type[0]) {
425             h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
426         }
427         if (left_type[1]) {
428             h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
429         }
430     }
431
432 #if 1
433     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
434         int list;
435         for(list=0; list<h->list_count; list++){
436             if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
437                 /*if(!h->mv_cache_clean[list]){
438                     memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
439                     memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
440                     h->mv_cache_clean[list]= 1;
441                 }*/
442                 continue;
443             }
444             h->mv_cache_clean[list]= 0;
445
446             if(USES_LIST(top_type, list)){
447                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
448                 const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
449                 *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
450                 *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
451                 *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
452                 *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
453                 h->ref_cache[list][scan8[0] + 0 - 1*8]=
454                 h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
455                 h->ref_cache[list][scan8[0] + 2 - 1*8]=
456                 h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
457             }else{
458                 *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
459                 *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
460                 *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
461                 *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
462                 *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
463             }
464
465             for(i=0; i<2; i++){
466                 int cache_idx = scan8[0] - 1 + i*2*8;
467                 if(USES_LIST(left_type[i], list)){
468                     const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
469                     const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
470                     *(uint32_t*)h->mv_cache[list][cache_idx  ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0+i*2]];
471                     *(uint32_t*)h->mv_cache[list][cache_idx+8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[1+i*2]];
472                     h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
473                     h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
474                 }else{
475                     *(uint32_t*)h->mv_cache [list][cache_idx  ]=
476                     *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
477                     h->ref_cache[list][cache_idx  ]=
478                     h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
479                 }
480             }
481
482             if((for_deblock || (IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred)) && !FRAME_MBAFF)
483                 continue;
484
485             if(USES_LIST(topleft_type, list)){
486                 const int b_xy = h->mb2b_xy[topleft_xy] + 3 + 3*h->b_stride;
487                 const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + h->b8_stride;
488                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
489                 h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
490             }else{
491                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
492                 h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
493             }
494
495             if(USES_LIST(topright_type, list)){
496                 const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
497                 const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
498                 *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
499                 h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
500             }else{
501                 *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
502                 h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
503             }
504
505             if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
506                 continue;
507
508             h->ref_cache[list][scan8[5 ]+1] =
509             h->ref_cache[list][scan8[7 ]+1] =
510             h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
511             h->ref_cache[list][scan8[4 ]] =
512             h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
513             *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
514             *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
515             *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
516             *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
517             *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
518
519             if( h->pps.cabac ) {
520                 /* XXX beurk, Load mvd */
521                 if(USES_LIST(top_type, list)){
522                     const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
523                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
524                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
525                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
526                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
527                 }else{
528                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
529                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
530                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
531                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
532                 }
533                 if(USES_LIST(left_type[0], list)){
534                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
535                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 0*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[0]];
536                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[1]];
537                 }else{
538                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
539                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
540                 }
541                 if(USES_LIST(left_type[1], list)){
542                     const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
543                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 2*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[2]];
544                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 3*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[3]];
545                 }else{
546                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
547                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
548                 }
549                 *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
550                 *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
551                 *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
552                 *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
553                 *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
554
555                 if(h->slice_type == B_TYPE){
556                     fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
557
558                     if(IS_DIRECT(top_type)){
559                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
560                     }else if(IS_8X8(top_type)){
561                         int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
562                         h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
563                         h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
564                     }else{
565                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
566                     }
567
568                     if(IS_DIRECT(left_type[0]))
569                         h->direct_cache[scan8[0] - 1 + 0*8]= 1;
570                     else if(IS_8X8(left_type[0]))
571                         h->direct_cache[scan8[0] - 1 + 0*8]= h->direct_table[h->mb2b8_xy[left_xy[0]] + 1 + h->b8_stride*(left_block[0]>>1)];
572                     else
573                         h->direct_cache[scan8[0] - 1 + 0*8]= 0;
574
575                     if(IS_DIRECT(left_type[1]))
576                         h->direct_cache[scan8[0] - 1 + 2*8]= 1;
577                     else if(IS_8X8(left_type[1]))
578                         h->direct_cache[scan8[0] - 1 + 2*8]= h->direct_table[h->mb2b8_xy[left_xy[1]] + 1 + h->b8_stride*(left_block[2]>>1)];
579                     else
580                         h->direct_cache[scan8[0] - 1 + 2*8]= 0;
581                 }
582             }
583
584             if(FRAME_MBAFF){
585 #define MAP_MVS\
586                     MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
587                     MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
588                     MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
589                     MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
590                     MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
591                     MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
592                     MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
593                     MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
594                     MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
595                     MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
596                 if(MB_FIELD){
597 #define MAP_F2F(idx, mb_type)\
598                     if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
599                         h->ref_cache[list][idx] <<= 1;\
600                         h->mv_cache[list][idx][1] /= 2;\
601                         h->mvd_cache[list][idx][1] /= 2;\
602                     }
603                     MAP_MVS
604 #undef MAP_F2F
605                 }else{
606 #define MAP_F2F(idx, mb_type)\
607                     if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
608                         h->ref_cache[list][idx] >>= 1;\
609                         h->mv_cache[list][idx][1] <<= 1;\
610                         h->mvd_cache[list][idx][1] <<= 1;\
611                     }
612                     MAP_MVS
613 #undef MAP_F2F
614                 }
615             }
616         }
617     }
618 #endif
619
620     h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
621 }
622
623 static inline void write_back_intra_pred_mode(H264Context *h){
624     MpegEncContext * const s = &h->s;
625     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
626
627     h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
628     h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
629     h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
630     h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
631     h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
632     h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
633     h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
634 }
635
636 /**
637  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
638  */
639 static inline int check_intra4x4_pred_mode(H264Context *h){
640     MpegEncContext * const s = &h->s;
641     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
642     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
643     int i;
644
645     if(!(h->top_samples_available&0x8000)){
646         for(i=0; i<4; i++){
647             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
648             if(status<0){
649                 av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
650                 return -1;
651             } else if(status){
652                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
653             }
654         }
655     }
656
657     if(!(h->left_samples_available&0x8000)){
658         for(i=0; i<4; i++){
659             int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
660             if(status<0){
661                 av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
662                 return -1;
663             } else if(status){
664                 h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
665             }
666         }
667     }
668
669     return 0;
670 } //FIXME cleanup like next
671
672 /**
673  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
674  */
675 static inline int check_intra_pred_mode(H264Context *h, int mode){
676     MpegEncContext * const s = &h->s;
677     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
678     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
679
680     if(mode > 6U) {
681         av_log(h->s.avctx, AV_LOG_ERROR, "out of range intra chroma pred mode at %d %d\n", s->mb_x, s->mb_y);
682         return -1;
683     }
684
685     if(!(h->top_samples_available&0x8000)){
686         mode= top[ mode ];
687         if(mode<0){
688             av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
689             return -1;
690         }
691     }
692
693     if(!(h->left_samples_available&0x8000)){
694         mode= left[ mode ];
695         if(mode<0){
696             av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
697             return -1;
698         }
699     }
700
701     return mode;
702 }
703
704 /**
705  * gets the predicted intra4x4 prediction mode.
706  */
707 static inline int pred_intra_mode(H264Context *h, int n){
708     const int index8= scan8[n];
709     const int left= h->intra4x4_pred_mode_cache[index8 - 1];
710     const int top = h->intra4x4_pred_mode_cache[index8 - 8];
711     const int min= FFMIN(left, top);
712
713     tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
714
715     if(min<0) return DC_PRED;
716     else      return min;
717 }
718
719 static inline void write_back_non_zero_count(H264Context *h){
720     MpegEncContext * const s = &h->s;
721     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
722
723     h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
724     h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
725     h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
726     h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
727     h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
728     h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
729     h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
730
731     h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
732     h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
733     h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
734
735     h->non_zero_count[mb_xy][12]=h->non_zero_count_cache[1+8*5];
736     h->non_zero_count[mb_xy][11]=h->non_zero_count_cache[2+8*5];
737     h->non_zero_count[mb_xy][10]=h->non_zero_count_cache[2+8*4];
738
739     if(FRAME_MBAFF){
740         // store all luma nnzs, for deblocking
741         int v = 0, i;
742         for(i=0; i<16; i++)
743             v += (!!h->non_zero_count_cache[scan8[i]]) << i;
744         *(uint16_t*)&h->non_zero_count[mb_xy][14] = v;
745     }
746 }
747
748 /**
749  * gets the predicted number of non zero coefficients.
750  * @param n block index
751  */
752 static inline int pred_non_zero_count(H264Context *h, int n){
753     const int index8= scan8[n];
754     const int left= h->non_zero_count_cache[index8 - 1];
755     const int top = h->non_zero_count_cache[index8 - 8];
756     int i= left + top;
757
758     if(i<64) i= (i+1)>>1;
759
760     tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
761
762     return i&31;
763 }
764
765 static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
766     const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
767     MpegEncContext *s = &h->s;
768
769     /* there is no consistent mapping of mvs to neighboring locations that will
770      * make mbaff happy, so we can't move all this logic to fill_caches */
771     if(FRAME_MBAFF){
772         const uint32_t *mb_types = s->current_picture_ptr->mb_type;
773         const int16_t *mv;
774         *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
775         *C = h->mv_cache[list][scan8[0]-2];
776
777         if(!MB_FIELD
778            && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
779             int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
780             if(IS_INTERLACED(mb_types[topright_xy])){
781 #define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
782                 const int x4 = X4, y4 = Y4;\
783                 const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
784                 if(!USES_LIST(mb_type,list) && !IS_8X8(mb_type))\
785                     return LIST_NOT_USED;\
786                 mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
787                 h->mv_cache[list][scan8[0]-2][0] = mv[0];\
788                 h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
789                 return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;
790
791                 SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
792             }
793         }
794         if(topright_ref == PART_NOT_AVAILABLE
795            && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
796            && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
797             if(!MB_FIELD
798                && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
799                 SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
800             }
801             if(MB_FIELD
802                && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
803                && i >= scan8[0]+8){
804                 // leftshift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's ok.
805                 SET_DIAG_MV(>>1, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
806             }
807         }
808 #undef SET_DIAG_MV
809     }
810
811     if(topright_ref != PART_NOT_AVAILABLE){
812         *C= h->mv_cache[list][ i - 8 + part_width ];
813         return topright_ref;
814     }else{
815         tprintf(s->avctx, "topright MV not available\n");
816
817         *C= h->mv_cache[list][ i - 8 - 1 ];
818         return h->ref_cache[list][ i - 8 - 1 ];
819     }
820 }
821
822 /**
823  * gets the predicted MV.
824  * @param n the block index
825  * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
826  * @param mx the x component of the predicted motion vector
827  * @param my the y component of the predicted motion vector
828  */
829 static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
830     const int index8= scan8[n];
831     const int top_ref=      h->ref_cache[list][ index8 - 8 ];
832     const int left_ref=     h->ref_cache[list][ index8 - 1 ];
833     const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
834     const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
835     const int16_t * C;
836     int diagonal_ref, match_count;
837
838     assert(part_width==1 || part_width==2 || part_width==4);
839
840 /* mv_cache
841   B . . A T T T T
842   U . . L . . , .
843   U . . L . . . .
844   U . . L . . , .
845   . . . L . . . .
846 */
847
848     diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
849     match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
850     tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
851     if(match_count > 1){ //most common
852         *mx= mid_pred(A[0], B[0], C[0]);
853         *my= mid_pred(A[1], B[1], C[1]);
854     }else if(match_count==1){
855         if(left_ref==ref){
856             *mx= A[0];
857             *my= A[1];
858         }else if(top_ref==ref){
859             *mx= B[0];
860             *my= B[1];
861         }else{
862             *mx= C[0];
863             *my= C[1];
864         }
865     }else{
866         if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
867             *mx= A[0];
868             *my= A[1];
869         }else{
870             *mx= mid_pred(A[0], B[0], C[0]);
871             *my= mid_pred(A[1], B[1], C[1]);
872         }
873     }
874
875     tprintf(h->s.avctx, "pred_motion (%2d %2d %2d) (%2d %2d %2d) (%2d %2d %2d) -> (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1],                    diagonal_ref, C[0], C[1], left_ref, A[0], A[1], ref, *mx, *my, h->s.mb_x, h->s.mb_y, n, list);
876 }
877
878 /**
879  * gets the directionally predicted 16x8 MV.
880  * @param n the block index
881  * @param mx the x component of the predicted motion vector
882  * @param my the y component of the predicted motion vector
883  */
884 static inline void pred_16x8_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
885     if(n==0){
886         const int top_ref=      h->ref_cache[list][ scan8[0] - 8 ];
887         const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
888
889         tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1], h->s.mb_x, h->s.mb_y, n, list);
890
891         if(top_ref == ref){
892             *mx= B[0];
893             *my= B[1];
894             return;
895         }
896     }else{
897         const int left_ref=     h->ref_cache[list][ scan8[8] - 1 ];
898         const int16_t * const A= h->mv_cache[list][ scan8[8] - 1 ];
899
900         tprintf(h->s.avctx, "pred_16x8: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
901
902         if(left_ref == ref){
903             *mx= A[0];
904             *my= A[1];
905             return;
906         }
907     }
908
909     //RARE
910     pred_motion(h, n, 4, list, ref, mx, my);
911 }
912
913 /**
914  * gets the directionally predicted 8x16 MV.
915  * @param n the block index
916  * @param mx the x component of the predicted motion vector
917  * @param my the y component of the predicted motion vector
918  */
919 static inline void pred_8x16_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
920     if(n==0){
921         const int left_ref=      h->ref_cache[list][ scan8[0] - 1 ];
922         const int16_t * const A=  h->mv_cache[list][ scan8[0] - 1 ];
923
924         tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", left_ref, A[0], A[1], h->s.mb_x, h->s.mb_y, n, list);
925
926         if(left_ref == ref){
927             *mx= A[0];
928             *my= A[1];
929             return;
930         }
931     }else{
932         const int16_t * C;
933         int diagonal_ref;
934
935         diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
936
937         tprintf(h->s.avctx, "pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d\n", diagonal_ref, C[0], C[1], h->s.mb_x, h->s.mb_y, n, list);
938
939         if(diagonal_ref == ref){
940             *mx= C[0];
941             *my= C[1];
942             return;
943         }
944     }
945
946     //RARE
947     pred_motion(h, n, 2, list, ref, mx, my);
948 }
949
950 static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
951     const int top_ref = h->ref_cache[0][ scan8[0] - 8 ];
952     const int left_ref= h->ref_cache[0][ scan8[0] - 1 ];
953
954     tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
955
956     if(top_ref == PART_NOT_AVAILABLE || left_ref == PART_NOT_AVAILABLE
957        || (top_ref == 0  && *(uint32_t*)h->mv_cache[0][ scan8[0] - 8 ] == 0)
958        || (left_ref == 0 && *(uint32_t*)h->mv_cache[0][ scan8[0] - 1 ] == 0)){
959
960         *mx = *my = 0;
961         return;
962     }
963
964     pred_motion(h, 0, 4, 0, 0, mx, my);
965
966     return;
967 }
968
969 static inline void direct_dist_scale_factor(H264Context * const h){
970     const int poc = h->s.current_picture_ptr->poc;
971     const int poc1 = h->ref_list[1][0].poc;
972     int i;
973     for(i=0; i<h->ref_count[0]; i++){
974         int poc0 = h->ref_list[0][i].poc;
975         int td = av_clip(poc1 - poc0, -128, 127);
976         if(td == 0 /* FIXME || pic0 is a long-term ref */){
977             h->dist_scale_factor[i] = 256;
978         }else{
979             int tb = av_clip(poc - poc0, -128, 127);
980             int tx = (16384 + (FFABS(td) >> 1)) / td;
981             h->dist_scale_factor[i] = av_clip((tb*tx + 32) >> 6, -1024, 1023);
982         }
983     }
984     if(FRAME_MBAFF){
985         for(i=0; i<h->ref_count[0]; i++){
986             h->dist_scale_factor_field[2*i] =
987             h->dist_scale_factor_field[2*i+1] = h->dist_scale_factor[i];
988         }
989     }
990 }
991 static inline void direct_ref_list_init(H264Context * const h){
992     MpegEncContext * const s = &h->s;
993     Picture * const ref1 = &h->ref_list[1][0];
994     Picture * const cur = s->current_picture_ptr;
995     int list, i, j;
996     if(cur->pict_type == I_TYPE)
997         cur->ref_count[0] = 0;
998     if(cur->pict_type != B_TYPE)
999         cur->ref_count[1] = 0;
1000     for(list=0; list<2; list++){
1001         cur->ref_count[list] = h->ref_count[list];
1002         for(j=0; j<h->ref_count[list]; j++)
1003             cur->ref_poc[list][j] = h->ref_list[list][j].poc;
1004     }
1005     if(cur->pict_type != B_TYPE || h->direct_spatial_mv_pred)
1006         return;
1007     for(list=0; list<2; list++){
1008         for(i=0; i<ref1->ref_count[list]; i++){
1009             const int poc = ref1->ref_poc[list][i];
1010             h->map_col_to_list0[list][i] = 0; /* bogus; fills in for missing frames */
1011             for(j=0; j<h->ref_count[list]; j++)
1012                 if(h->ref_list[list][j].poc == poc){
1013                     h->map_col_to_list0[list][i] = j;
1014                     break;
1015                 }
1016         }
1017     }
1018     if(FRAME_MBAFF){
1019         for(list=0; list<2; list++){
1020             for(i=0; i<ref1->ref_count[list]; i++){
1021                 j = h->map_col_to_list0[list][i];
1022                 h->map_col_to_list0_field[list][2*i] = 2*j;
1023                 h->map_col_to_list0_field[list][2*i+1] = 2*j+1;
1024             }
1025         }
1026     }
1027 }
1028
1029 static inline void pred_direct_motion(H264Context * const h, int *mb_type){
1030     MpegEncContext * const s = &h->s;
1031     const int mb_xy =   s->mb_x +   s->mb_y*s->mb_stride;
1032     const int b8_xy = 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1033     const int b4_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1034     const int mb_type_col = h->ref_list[1][0].mb_type[mb_xy];
1035     const int16_t (*l1mv0)[2] = (const int16_t (*)[2]) &h->ref_list[1][0].motion_val[0][b4_xy];
1036     const int16_t (*l1mv1)[2] = (const int16_t (*)[2]) &h->ref_list[1][0].motion_val[1][b4_xy];
1037     const int8_t *l1ref0 = &h->ref_list[1][0].ref_index[0][b8_xy];
1038     const int8_t *l1ref1 = &h->ref_list[1][0].ref_index[1][b8_xy];
1039     const int is_b8x8 = IS_8X8(*mb_type);
1040     unsigned int sub_mb_type;
1041     int i8, i4;
1042
1043 #define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
1044     if(IS_8X8(mb_type_col) && !h->sps.direct_8x8_inference_flag){
1045         /* FIXME save sub mb types from previous frames (or derive from MVs)
1046          * so we know exactly what block size to use */
1047         sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
1048         *mb_type =    MB_TYPE_8x8|MB_TYPE_L0L1;
1049     }else if(!is_b8x8 && (mb_type_col & MB_TYPE_16x16_OR_INTRA)){
1050         sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1051         *mb_type =    MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
1052     }else{
1053         sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1054         *mb_type =    MB_TYPE_8x8|MB_TYPE_L0L1;
1055     }
1056     if(!is_b8x8)
1057         *mb_type |= MB_TYPE_DIRECT2;
1058     if(MB_FIELD)
1059         *mb_type |= MB_TYPE_INTERLACED;
1060
1061     tprintf(s->avctx, "mb_type = %08x, sub_mb_type = %08x, is_b8x8 = %d, mb_type_col = %08x\n", *mb_type, sub_mb_type, is_b8x8, mb_type_col);
1062
1063     if(h->direct_spatial_mv_pred){
1064         int ref[2];
1065         int mv[2][2];
1066         int list;
1067
1068         /* FIXME interlacing + spatial direct uses wrong colocated block positions */
1069
1070         /* ref = min(neighbors) */
1071         for(list=0; list<2; list++){
1072             int refa = h->ref_cache[list][scan8[0] - 1];
1073             int refb = h->ref_cache[list][scan8[0] - 8];
1074             int refc = h->ref_cache[list][scan8[0] - 8 + 4];
1075             if(refc == -2)
1076                 refc = h->ref_cache[list][scan8[0] - 8 - 1];
1077             ref[list] = refa;
1078             if(ref[list] < 0 || (refb < ref[list] && refb >= 0))
1079                 ref[list] = refb;
1080             if(ref[list] < 0 || (refc < ref[list] && refc >= 0))
1081                 ref[list] = refc;
1082             if(ref[list] < 0)
1083                 ref[list] = -1;
1084         }
1085
1086         if(ref[0] < 0 && ref[1] < 0){
1087             ref[0] = ref[1] = 0;
1088             mv[0][0] = mv[0][1] =
1089             mv[1][0] = mv[1][1] = 0;
1090         }else{
1091             for(list=0; list<2; list++){
1092                 if(ref[list] >= 0)
1093                     pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
1094                 else
1095                     mv[list][0] = mv[list][1] = 0;
1096             }
1097         }
1098
1099         if(ref[1] < 0){
1100             *mb_type &= ~MB_TYPE_P0L1;
1101             sub_mb_type &= ~MB_TYPE_P0L1;
1102         }else if(ref[0] < 0){
1103             *mb_type &= ~MB_TYPE_P0L0;
1104             sub_mb_type &= ~MB_TYPE_P0L0;
1105         }
1106
1107         if(IS_16X16(*mb_type)){
1108             int a=0, b=0;
1109
1110             fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
1111             fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
1112             if(!IS_INTRA(mb_type_col)
1113                && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
1114                    || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
1115                        && (h->x264_build>33 || !h->x264_build)))){
1116                 if(ref[0] > 0)
1117                     a= pack16to32(mv[0][0],mv[0][1]);
1118                 if(ref[1] > 0)
1119                     b= pack16to32(mv[1][0],mv[1][1]);
1120             }else{
1121                 a= pack16to32(mv[0][0],mv[0][1]);
1122                 b= pack16to32(mv[1][0],mv[1][1]);
1123             }
1124             fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
1125             fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
1126         }else{
1127             for(i8=0; i8<4; i8++){
1128                 const int x8 = i8&1;
1129                 const int y8 = i8>>1;
1130
1131                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1132                     continue;
1133                 h->sub_mb_type[i8] = sub_mb_type;
1134
1135                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
1136                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
1137                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1138                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1139
1140                 /* col_zero_flag */
1141                 if(!IS_INTRA(mb_type_col) && (   l1ref0[x8 + y8*h->b8_stride] == 0
1142                                               || (l1ref0[x8 + y8*h->b8_stride] < 0 && l1ref1[x8 + y8*h->b8_stride] == 0
1143                                                   && (h->x264_build>33 || !h->x264_build)))){
1144                     const int16_t (*l1mv)[2]= l1ref0[x8 + y8*h->b8_stride] == 0 ? l1mv0 : l1mv1;
1145                     if(IS_SUB_8X8(sub_mb_type)){
1146                         const int16_t *mv_col = l1mv[x8*3 + y8*3*h->b_stride];
1147                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1148                             if(ref[0] == 0)
1149                                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1150                             if(ref[1] == 0)
1151                                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1152                         }
1153                     }else
1154                     for(i4=0; i4<4; i4++){
1155                         const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*h->b_stride];
1156                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1157                             if(ref[0] == 0)
1158                                 *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1159                             if(ref[1] == 0)
1160                                 *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
1161                         }
1162                     }
1163                 }
1164             }
1165         }
1166     }else{ /* direct temporal mv pred */
1167         const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
1168         const int *dist_scale_factor = h->dist_scale_factor;
1169
1170         if(FRAME_MBAFF){
1171             if(IS_INTERLACED(*mb_type)){
1172                 map_col_to_list0[0] = h->map_col_to_list0_field[0];
1173                 map_col_to_list0[1] = h->map_col_to_list0_field[1];
1174                 dist_scale_factor = h->dist_scale_factor_field;
1175             }
1176             if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col)){
1177                 /* FIXME assumes direct_8x8_inference == 1 */
1178                 const int pair_xy = s->mb_x + (s->mb_y&~1)*s->mb_stride;
1179                 int mb_types_col[2];
1180                 int y_shift;
1181
1182                 *mb_type = MB_TYPE_8x8|MB_TYPE_L0L1
1183                          | (is_b8x8 ? 0 : MB_TYPE_DIRECT2)
1184                          | (*mb_type & MB_TYPE_INTERLACED);
1185                 sub_mb_type = MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_16x16;
1186
1187                 if(IS_INTERLACED(*mb_type)){
1188                     /* frame to field scaling */
1189                     mb_types_col[0] = h->ref_list[1][0].mb_type[pair_xy];
1190                     mb_types_col[1] = h->ref_list[1][0].mb_type[pair_xy+s->mb_stride];
1191                     if(s->mb_y&1){
1192                         l1ref0 -= 2*h->b8_stride;
1193                         l1ref1 -= 2*h->b8_stride;
1194                         l1mv0 -= 4*h->b_stride;
1195                         l1mv1 -= 4*h->b_stride;
1196                     }
1197                     y_shift = 0;
1198
1199                     if(   (mb_types_col[0] & MB_TYPE_16x16_OR_INTRA)
1200                        && (mb_types_col[1] & MB_TYPE_16x16_OR_INTRA)
1201                        && !is_b8x8)
1202                         *mb_type |= MB_TYPE_16x8;
1203                     else
1204                         *mb_type |= MB_TYPE_8x8;
1205                 }else{
1206                     /* field to frame scaling */
1207                     /* col_mb_y = (mb_y&~1) + (topAbsDiffPOC < bottomAbsDiffPOC ? 0 : 1)
1208                      * but in MBAFF, top and bottom POC are equal */
1209                     int dy = (s->mb_y&1) ? 1 : 2;
1210                     mb_types_col[0] =
1211                     mb_types_col[1] = h->ref_list[1][0].mb_type[pair_xy+s->mb_stride];
1212                     l1ref0 += dy*h->b8_stride;
1213                     l1ref1 += dy*h->b8_stride;
1214                     l1mv0 += 2*dy*h->b_stride;
1215                     l1mv1 += 2*dy*h->b_stride;
1216                     y_shift = 2;
1217
1218                     if((mb_types_col[0] & (MB_TYPE_16x16_OR_INTRA|MB_TYPE_16x8))
1219                        && !is_b8x8)
1220                         *mb_type |= MB_TYPE_16x16;
1221                     else
1222                         *mb_type |= MB_TYPE_8x8;
1223                 }
1224
1225                 for(i8=0; i8<4; i8++){
1226                     const int x8 = i8&1;
1227                     const int y8 = i8>>1;
1228                     int ref0, scale;
1229                     const int16_t (*l1mv)[2]= l1mv0;
1230
1231                     if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1232                         continue;
1233                     h->sub_mb_type[i8] = sub_mb_type;
1234
1235                     fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1236                     if(IS_INTRA(mb_types_col[y8])){
1237                         fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1238                         fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1239                         fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1240                         continue;
1241                     }
1242
1243                     ref0 = l1ref0[x8 + (y8*2>>y_shift)*h->b8_stride];
1244                     if(ref0 >= 0)
1245                         ref0 = map_col_to_list0[0][ref0*2>>y_shift];
1246                     else{
1247                         ref0 = map_col_to_list0[1][l1ref1[x8 + (y8*2>>y_shift)*h->b8_stride]*2>>y_shift];
1248                         l1mv= l1mv1;
1249                     }
1250                     scale = dist_scale_factor[ref0];
1251                     fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1252
1253                     {
1254                         const int16_t *mv_col = l1mv[x8*3 + (y8*6>>y_shift)*h->b_stride];
1255                         int my_col = (mv_col[1]<<y_shift)/2;
1256                         int mx = (scale * mv_col[0] + 128) >> 8;
1257                         int my = (scale * my_col + 128) >> 8;
1258                         fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1259                         fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
1260                     }
1261                 }
1262                 return;
1263             }
1264         }
1265
1266         /* one-to-one mv scaling */
1267
1268         if(IS_16X16(*mb_type)){
1269             int ref, mv0, mv1;
1270
1271             fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
1272             if(IS_INTRA(mb_type_col)){
1273                 ref=mv0=mv1=0;
1274             }else{
1275                 const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0]]
1276                                                 : map_col_to_list0[1][l1ref1[0]];
1277                 const int scale = dist_scale_factor[ref0];
1278                 const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
1279                 int mv_l0[2];
1280                 mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1281                 mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1282                 ref= ref0;
1283                 mv0= pack16to32(mv_l0[0],mv_l0[1]);
1284                 mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1285             }
1286             fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
1287             fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
1288             fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
1289         }else{
1290             for(i8=0; i8<4; i8++){
1291                 const int x8 = i8&1;
1292                 const int y8 = i8>>1;
1293                 int ref0, scale;
1294                 const int16_t (*l1mv)[2]= l1mv0;
1295
1296                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1297                     continue;
1298                 h->sub_mb_type[i8] = sub_mb_type;
1299                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1300                 if(IS_INTRA(mb_type_col)){
1301                     fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1302                     fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1303                     fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1304                     continue;
1305                 }
1306
1307                 ref0 = l1ref0[x8 + y8*h->b8_stride];
1308                 if(ref0 >= 0)
1309                     ref0 = map_col_to_list0[0][ref0];
1310                 else{
1311                     ref0 = map_col_to_list0[1][l1ref1[x8 + y8*h->b8_stride]];
1312                     l1mv= l1mv1;
1313                 }
1314                 scale = dist_scale_factor[ref0];
1315
1316                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1317                 if(IS_SUB_8X8(sub_mb_type)){
1318                     const int16_t *mv_col = l1mv[x8*3 + y8*3*h->b_stride];
1319                     int mx = (scale * mv_col[0] + 128) >> 8;
1320                     int my = (scale * mv_col[1] + 128) >> 8;
1321                     fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1322                     fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
1323                 }else
1324                 for(i4=0; i4<4; i4++){
1325                     const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*h->b_stride];
1326                     int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
1327                     mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1328                     mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1329                     *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
1330                         pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1331                 }
1332             }
1333         }
1334     }
1335 }
1336
1337 static inline void write_back_motion(H264Context *h, int mb_type){
1338     MpegEncContext * const s = &h->s;
1339     const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1340     const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1341     int list;
1342
1343     if(!USES_LIST(mb_type, 0))
1344         fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1345
1346     for(list=0; list<h->list_count; list++){
1347         int y;
1348         if(!USES_LIST(mb_type, list))
1349             continue;
1350
1351         for(y=0; y<4; y++){
1352             *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+0 + 8*y];
1353             *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+2 + 8*y];
1354         }
1355         if( h->pps.cabac ) {
1356             if(IS_SKIP(mb_type))
1357                 fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
1358             else
1359             for(y=0; y<4; y++){
1360                 *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
1361                 *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
1362             }
1363         }
1364
1365         {
1366             int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1367             ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1368             ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1369             ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1370             ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1371         }
1372     }
1373
1374     if(h->slice_type == B_TYPE && h->pps.cabac){
1375         if(IS_8X8(mb_type)){
1376             uint8_t *direct_table = &h->direct_table[b8_xy];
1377             direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1378             direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1379             direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1380         }
1381     }
1382 }
1383
1384 /**
1385  * Decodes a network abstraction layer unit.
1386  * @param consumed is the number of bytes used as input
1387  * @param length is the length of the array
1388  * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
1389  * @returns decoded bytes, might be src+1 if no escapes
1390  */
1391 static uint8_t *decode_nal(H264Context *h, uint8_t *src, int *dst_length, int *consumed, int length){
1392     int i, si, di;
1393     uint8_t *dst;
1394     int bufidx;
1395
1396 //    src[0]&0x80;                //forbidden bit
1397     h->nal_ref_idc= src[0]>>5;
1398     h->nal_unit_type= src[0]&0x1F;
1399
1400     src++; length--;
1401 #if 0
1402     for(i=0; i<length; i++)
1403         printf("%2X ", src[i]);
1404 #endif
1405     for(i=0; i+1<length; i+=2){
1406         if(src[i]) continue;
1407         if(i>0 && src[i-1]==0) i--;
1408         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
1409             if(src[i+2]!=3){
1410                 /* startcode, so we must be past the end */
1411                 length=i;
1412             }
1413             break;
1414         }
1415     }
1416
1417     if(i>=length-1){ //no escaped 0
1418         *dst_length= length;
1419         *consumed= length+1; //+1 for the header
1420         return src;
1421     }
1422
1423     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
1424     h->rbsp_buffer[bufidx]= av_fast_realloc(h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length);
1425     dst= h->rbsp_buffer[bufidx];
1426
1427     if (dst == NULL){
1428         return NULL;
1429     }
1430
1431 //printf("decoding esc\n");
1432     si=di=0;
1433     while(si<length){
1434         //remove escapes (very rare 1:2^22)
1435         if(si+2<length && src[si]==0 && src[si+1]==0 && src[si+2]<=3){
1436             if(src[si+2]==3){ //escape
1437                 dst[di++]= 0;
1438                 dst[di++]= 0;
1439                 si+=3;
1440                 continue;
1441             }else //next start code
1442                 break;
1443         }
1444
1445         dst[di++]= src[si++];
1446     }
1447
1448     *dst_length= di;
1449     *consumed= si + 1;//+1 for the header
1450 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
1451     return dst;
1452 }
1453
1454 /**
1455  * identifies the exact end of the bitstream
1456  * @return the length of the trailing, or 0 if damaged
1457  */
1458 static int decode_rbsp_trailing(H264Context *h, uint8_t *src){
1459     int v= *src;
1460     int r;
1461
1462     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
1463
1464     for(r=1; r<9; r++){
1465         if(v&1) return r;
1466         v>>=1;
1467     }
1468     return 0;
1469 }
1470
1471 /**
1472  * idct tranforms the 16 dc values and dequantize them.
1473  * @param qp quantization parameter
1474  */
1475 static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1476 #define stride 16
1477     int i;
1478     int temp[16]; //FIXME check if this is a good idea
1479     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1480     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1481
1482 //memset(block, 64, 2*256);
1483 //return;
1484     for(i=0; i<4; i++){
1485         const int offset= y_offset[i];
1486         const int z0= block[offset+stride*0] + block[offset+stride*4];
1487         const int z1= block[offset+stride*0] - block[offset+stride*4];
1488         const int z2= block[offset+stride*1] - block[offset+stride*5];
1489         const int z3= block[offset+stride*1] + block[offset+stride*5];
1490
1491         temp[4*i+0]= z0+z3;
1492         temp[4*i+1]= z1+z2;
1493         temp[4*i+2]= z1-z2;
1494         temp[4*i+3]= z0-z3;
1495     }
1496
1497     for(i=0; i<4; i++){
1498         const int offset= x_offset[i];
1499         const int z0= temp[4*0+i] + temp[4*2+i];
1500         const int z1= temp[4*0+i] - temp[4*2+i];
1501         const int z2= temp[4*1+i] - temp[4*3+i];
1502         const int z3= temp[4*1+i] + temp[4*3+i];
1503
1504         block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_resdual
1505         block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
1506         block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
1507         block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
1508     }
1509 }
1510
1511 #if 0
1512 /**
1513  * dct tranforms the 16 dc values.
1514  * @param qp quantization parameter ??? FIXME
1515  */
1516 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
1517 //    const int qmul= dequant_coeff[qp][0];
1518     int i;
1519     int temp[16]; //FIXME check if this is a good idea
1520     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1521     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1522
1523     for(i=0; i<4; i++){
1524         const int offset= y_offset[i];
1525         const int z0= block[offset+stride*0] + block[offset+stride*4];
1526         const int z1= block[offset+stride*0] - block[offset+stride*4];
1527         const int z2= block[offset+stride*1] - block[offset+stride*5];
1528         const int z3= block[offset+stride*1] + block[offset+stride*5];
1529
1530         temp[4*i+0]= z0+z3;
1531         temp[4*i+1]= z1+z2;
1532         temp[4*i+2]= z1-z2;
1533         temp[4*i+3]= z0-z3;
1534     }
1535
1536     for(i=0; i<4; i++){
1537         const int offset= x_offset[i];
1538         const int z0= temp[4*0+i] + temp[4*2+i];
1539         const int z1= temp[4*0+i] - temp[4*2+i];
1540         const int z2= temp[4*1+i] - temp[4*3+i];
1541         const int z3= temp[4*1+i] + temp[4*3+i];
1542
1543         block[stride*0 +offset]= (z0 + z3)>>1;
1544         block[stride*2 +offset]= (z1 + z2)>>1;
1545         block[stride*8 +offset]= (z1 - z2)>>1;
1546         block[stride*10+offset]= (z0 - z3)>>1;
1547     }
1548 }
1549 #endif
1550
1551 #undef xStride
1552 #undef stride
1553
1554 static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1555     const int stride= 16*2;
1556     const int xStride= 16;
1557     int a,b,c,d,e;
1558
1559     a= block[stride*0 + xStride*0];
1560     b= block[stride*0 + xStride*1];
1561     c= block[stride*1 + xStride*0];
1562     d= block[stride*1 + xStride*1];
1563
1564     e= a-b;
1565     a= a+b;
1566     b= c-d;
1567     c= c+d;
1568
1569     block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
1570     block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
1571     block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
1572     block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
1573 }
1574
1575 #if 0
1576 static void chroma_dc_dct_c(DCTELEM *block){
1577     const int stride= 16*2;
1578     const int xStride= 16;
1579     int a,b,c,d,e;
1580
1581     a= block[stride*0 + xStride*0];
1582     b= block[stride*0 + xStride*1];
1583     c= block[stride*1 + xStride*0];
1584     d= block[stride*1 + xStride*1];
1585
1586     e= a-b;
1587     a= a+b;
1588     b= c-d;
1589     c= c+d;
1590
1591     block[stride*0 + xStride*0]= (a+c);
1592     block[stride*0 + xStride*1]= (e+b);
1593     block[stride*1 + xStride*0]= (a-c);
1594     block[stride*1 + xStride*1]= (e-b);
1595 }
1596 #endif
1597
1598 /**
1599  * gets the chroma qp.
1600  */
1601 static inline int get_chroma_qp(H264Context *h, int t, int qscale){
1602     return h->pps.chroma_qp_table[t][qscale & 0xff];
1603 }
1604
1605 //FIXME need to check that this does not overflow signed 32 bit for low qp, i am not sure, it's very close
1606 //FIXME check that gcc inlines this (and optimizes intra & separate_dc stuff away)
1607 static inline int quantize_c(DCTELEM *block, uint8_t *scantable, int qscale, int intra, int separate_dc){
1608     int i;
1609     const int * const quant_table= quant_coeff[qscale];
1610     const int bias= intra ? (1<<QUANT_SHIFT)/3 : (1<<QUANT_SHIFT)/6;
1611     const unsigned int threshold1= (1<<QUANT_SHIFT) - bias - 1;
1612     const unsigned int threshold2= (threshold1<<1);
1613     int last_non_zero;
1614
1615     if(separate_dc){
1616         if(qscale<=18){
1617             //avoid overflows
1618             const int dc_bias= intra ? (1<<(QUANT_SHIFT-2))/3 : (1<<(QUANT_SHIFT-2))/6;
1619             const unsigned int dc_threshold1= (1<<(QUANT_SHIFT-2)) - dc_bias - 1;
1620             const unsigned int dc_threshold2= (dc_threshold1<<1);
1621
1622             int level= block[0]*quant_coeff[qscale+18][0];
1623             if(((unsigned)(level+dc_threshold1))>dc_threshold2){
1624                 if(level>0){
1625                     level= (dc_bias + level)>>(QUANT_SHIFT-2);
1626                     block[0]= level;
1627                 }else{
1628                     level= (dc_bias - level)>>(QUANT_SHIFT-2);
1629                     block[0]= -level;
1630                 }
1631 //                last_non_zero = i;
1632             }else{
1633                 block[0]=0;
1634             }
1635         }else{
1636             const int dc_bias= intra ? (1<<(QUANT_SHIFT+1))/3 : (1<<(QUANT_SHIFT+1))/6;
1637             const unsigned int dc_threshold1= (1<<(QUANT_SHIFT+1)) - dc_bias - 1;
1638             const unsigned int dc_threshold2= (dc_threshold1<<1);
1639
1640             int level= block[0]*quant_table[0];
1641             if(((unsigned)(level+dc_threshold1))>dc_threshold2){
1642                 if(level>0){
1643                     level= (dc_bias + level)>>(QUANT_SHIFT+1);
1644                     block[0]= level;
1645                 }else{
1646                     level= (dc_bias - level)>>(QUANT_SHIFT+1);
1647                     block[0]= -level;
1648                 }
1649 //                last_non_zero = i;
1650             }else{
1651                 block[0]=0;
1652             }
1653         }
1654         last_non_zero= 0;
1655         i=1;
1656     }else{
1657         last_non_zero= -1;
1658         i=0;
1659     }
1660
1661     for(; i<16; i++){
1662         const int j= scantable[i];
1663         int level= block[j]*quant_table[j];
1664
1665 //        if(   bias+level >= (1<<(QMAT_SHIFT - 3))
1666 //           || bias-level >= (1<<(QMAT_SHIFT - 3))){
1667         if(((unsigned)(level+threshold1))>threshold2){
1668             if(level>0){
1669                 level= (bias + level)>>QUANT_SHIFT;
1670                 block[j]= level;
1671             }else{
1672                 level= (bias - level)>>QUANT_SHIFT;
1673                 block[j]= -level;
1674             }
1675             last_non_zero = i;
1676         }else{
1677             block[j]=0;
1678         }
1679     }
1680
1681     return last_non_zero;
1682 }
1683
1684 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
1685                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1686                            int src_x_offset, int src_y_offset,
1687                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
1688     MpegEncContext * const s = &h->s;
1689     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
1690     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
1691     const int luma_xy= (mx&3) + ((my&3)<<2);
1692     uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
1693     uint8_t * src_cb, * src_cr;
1694     int extra_width= h->emu_edge_width;
1695     int extra_height= h->emu_edge_height;
1696     int emu=0;
1697     const int full_mx= mx>>2;
1698     const int full_my= my>>2;
1699     const int pic_width  = 16*s->mb_width;
1700     const int pic_height = 16*s->mb_height >> MB_MBAFF;
1701
1702     if(!pic->data[0]) //FIXME this is unacceptable, some senseable error concealment must be done for missing reference frames
1703         return;
1704
1705     if(mx&7) extra_width -= 3;
1706     if(my&7) extra_height -= 3;
1707
1708     if(   full_mx < 0-extra_width
1709        || full_my < 0-extra_height
1710        || full_mx + 16/*FIXME*/ > pic_width + extra_width
1711        || full_my + 16/*FIXME*/ > pic_height + extra_height){
1712         ff_emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->mb_linesize, h->mb_linesize, 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
1713             src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
1714         emu=1;
1715     }
1716
1717     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
1718     if(!square){
1719         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
1720     }
1721
1722     if(ENABLE_GRAY && s->flags&CODEC_FLAG_GRAY) return;
1723
1724     if(MB_MBAFF){
1725         // chroma offset when predicting from a field of opposite parity
1726         my += 2 * ((s->mb_y & 1) - (h->ref_cache[list][scan8[n]] & 1));
1727         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
1728     }
1729     src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1730     src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1731
1732     if(emu){
1733         ff_emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
1734             src_cb= s->edge_emu_buffer;
1735     }
1736     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1737
1738     if(emu){
1739         ff_emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
1740             src_cr= s->edge_emu_buffer;
1741     }
1742     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1743 }
1744
1745 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
1746                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1747                            int x_offset, int y_offset,
1748                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1749                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1750                            int list0, int list1){
1751     MpegEncContext * const s = &h->s;
1752     qpel_mc_func *qpix_op=  qpix_put;
1753     h264_chroma_mc_func chroma_op= chroma_put;
1754
1755     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1756     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1757     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1758     x_offset += 8*s->mb_x;
1759     y_offset += 8*(s->mb_y >> MB_MBAFF);
1760
1761     if(list0){
1762         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
1763         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
1764                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
1765                            qpix_op, chroma_op);
1766
1767         qpix_op=  qpix_avg;
1768         chroma_op= chroma_avg;
1769     }
1770
1771     if(list1){
1772         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
1773         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
1774                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
1775                            qpix_op, chroma_op);
1776     }
1777 }
1778
1779 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
1780                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1781                            int x_offset, int y_offset,
1782                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1783                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
1784                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
1785                            int list0, int list1){
1786     MpegEncContext * const s = &h->s;
1787
1788     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1789     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1790     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1791     x_offset += 8*s->mb_x;
1792     y_offset += 8*(s->mb_y >> MB_MBAFF);
1793
1794     if(list0 && list1){
1795         /* don't optimize for luma-only case, since B-frames usually
1796          * use implicit weights => chroma too. */
1797         uint8_t *tmp_cb = s->obmc_scratchpad;
1798         uint8_t *tmp_cr = s->obmc_scratchpad + 8;
1799         uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
1800         int refn0 = h->ref_cache[0][ scan8[n] ];
1801         int refn1 = h->ref_cache[1][ scan8[n] ];
1802
1803         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
1804                     dest_y, dest_cb, dest_cr,
1805                     x_offset, y_offset, qpix_put, chroma_put);
1806         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
1807                     tmp_y, tmp_cb, tmp_cr,
1808                     x_offset, y_offset, qpix_put, chroma_put);
1809
1810         if(h->use_weight == 2){
1811             int weight0 = h->implicit_weight[refn0][refn1];
1812             int weight1 = 64 - weight0;
1813             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
1814             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
1815             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
1816         }else{
1817             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
1818                             h->luma_weight[0][refn0], h->luma_weight[1][refn1],
1819                             h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
1820             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1821                             h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
1822                             h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
1823             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1824                             h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
1825                             h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
1826         }
1827     }else{
1828         int list = list1 ? 1 : 0;
1829         int refn = h->ref_cache[list][ scan8[n] ];
1830         Picture *ref= &h->ref_list[list][refn];
1831         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
1832                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
1833                     qpix_put, chroma_put);
1834
1835         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
1836                        h->luma_weight[list][refn], h->luma_offset[list][refn]);
1837         if(h->use_weight_chroma){
1838             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1839                              h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
1840             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1841                              h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
1842         }
1843     }
1844 }
1845
1846 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
1847                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1848                            int x_offset, int y_offset,
1849                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1850                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1851                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
1852                            int list0, int list1){
1853     if((h->use_weight==2 && list0 && list1
1854         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
1855        || h->use_weight==1)
1856         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1857                          x_offset, y_offset, qpix_put, chroma_put,
1858                          weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
1859     else
1860         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1861                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
1862 }
1863
1864 static inline void prefetch_motion(H264Context *h, int list){
1865     /* fetch pixels for estimated mv 4 macroblocks ahead
1866      * optimized for 64byte cache lines */
1867     MpegEncContext * const s = &h->s;
1868     const int refn = h->ref_cache[list][scan8[0]];
1869     if(refn >= 0){
1870         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
1871         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
1872         uint8_t **src= h->ref_list[list][refn].data;
1873         int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
1874         s->dsp.prefetch(src[0]+off, s->linesize, 4);
1875         off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
1876         s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
1877     }
1878 }
1879
1880 static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1881                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
1882                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
1883                       h264_weight_func *weight_op, h264_biweight_func *weight_avg){
1884     MpegEncContext * const s = &h->s;
1885     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
1886     const int mb_type= s->current_picture.mb_type[mb_xy];
1887
1888     assert(IS_INTER(mb_type));
1889
1890     prefetch_motion(h, 0);
1891
1892     if(IS_16X16(mb_type)){
1893         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
1894                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
1895                 &weight_op[0], &weight_avg[0],
1896                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1897     }else if(IS_16X8(mb_type)){
1898         mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
1899                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1900                 &weight_op[1], &weight_avg[1],
1901                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1902         mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
1903                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1904                 &weight_op[1], &weight_avg[1],
1905                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1906     }else if(IS_8X16(mb_type)){
1907         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
1908                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1909                 &weight_op[2], &weight_avg[2],
1910                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1911         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
1912                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1913                 &weight_op[2], &weight_avg[2],
1914                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1915     }else{
1916         int i;
1917
1918         assert(IS_8X8(mb_type));
1919
1920         for(i=0; i<4; i++){
1921             const int sub_mb_type= h->sub_mb_type[i];
1922             const int n= 4*i;
1923             int x_offset= (i&1)<<2;
1924             int y_offset= (i&2)<<1;
1925
1926             if(IS_SUB_8X8(sub_mb_type)){
1927                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1928                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1929                     &weight_op[3], &weight_avg[3],
1930                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1931             }else if(IS_SUB_8X4(sub_mb_type)){
1932                 mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1933                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1934                     &weight_op[4], &weight_avg[4],
1935                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1936                 mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
1937                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1938                     &weight_op[4], &weight_avg[4],
1939                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1940             }else if(IS_SUB_4X8(sub_mb_type)){
1941                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1942                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1943                     &weight_op[5], &weight_avg[5],
1944                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1945                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
1946                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1947                     &weight_op[5], &weight_avg[5],
1948                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1949             }else{
1950                 int j;
1951                 assert(IS_SUB_4X4(sub_mb_type));
1952                 for(j=0; j<4; j++){
1953                     int sub_x_offset= x_offset + 2*(j&1);
1954                     int sub_y_offset= y_offset +   (j&2);
1955                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
1956                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1957                         &weight_op[6], &weight_avg[6],
1958                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1959                 }
1960             }
1961         }
1962     }
1963
1964     prefetch_motion(h, 1);
1965 }
1966
1967 static void decode_init_vlc(void){
1968     static int done = 0;
1969
1970     if (!done) {
1971         int i;
1972         done = 1;
1973
1974         init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
1975                  &chroma_dc_coeff_token_len [0], 1, 1,
1976                  &chroma_dc_coeff_token_bits[0], 1, 1, 1);
1977
1978         for(i=0; i<4; i++){
1979             init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
1980                      &coeff_token_len [i][0], 1, 1,
1981                      &coeff_token_bits[i][0], 1, 1, 1);
1982         }
1983
1984         for(i=0; i<3; i++){
1985             init_vlc(&chroma_dc_total_zeros_vlc[i], CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
1986                      &chroma_dc_total_zeros_len [i][0], 1, 1,
1987                      &chroma_dc_total_zeros_bits[i][0], 1, 1, 1);
1988         }
1989         for(i=0; i<15; i++){
1990             init_vlc(&total_zeros_vlc[i], TOTAL_ZEROS_VLC_BITS, 16,
1991                      &total_zeros_len [i][0], 1, 1,
1992                      &total_zeros_bits[i][0], 1, 1, 1);
1993         }
1994
1995         for(i=0; i<6; i++){
1996             init_vlc(&run_vlc[i], RUN_VLC_BITS, 7,
1997                      &run_len [i][0], 1, 1,
1998                      &run_bits[i][0], 1, 1, 1);
1999         }
2000         init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
2001                  &run_len [6][0], 1, 1,
2002                  &run_bits[6][0], 1, 1, 1);
2003     }
2004 }
2005
2006 static void free_tables(H264Context *h){
2007     int i;
2008     H264Context *hx;
2009     av_freep(&h->intra4x4_pred_mode);
2010     av_freep(&h->chroma_pred_mode_table);
2011     av_freep(&h->cbp_table);
2012     av_freep(&h->mvd_table[0]);
2013     av_freep(&h->mvd_table[1]);
2014     av_freep(&h->direct_table);
2015     av_freep(&h->non_zero_count);
2016     av_freep(&h->slice_table_base);
2017     h->slice_table= NULL;
2018
2019     av_freep(&h->mb2b_xy);
2020     av_freep(&h->mb2b8_xy);
2021
2022     for(i = 0; i < MAX_SPS_COUNT; i++)
2023         av_freep(h->sps_buffers + i);
2024
2025     for(i = 0; i < MAX_PPS_COUNT; i++)
2026         av_freep(h->pps_buffers + i);
2027
2028     for(i = 0; i < h->s.avctx->thread_count; i++) {
2029         hx = h->thread_context[i];
2030         if(!hx) continue;
2031         av_freep(&hx->top_borders[1]);
2032         av_freep(&hx->top_borders[0]);
2033         av_freep(&hx->s.obmc_scratchpad);
2034         av_freep(&hx->s.allocated_edge_emu_buffer);
2035     }
2036 }
2037
2038 static void init_dequant8_coeff_table(H264Context *h){
2039     int i,q,x;
2040     const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
2041     h->dequant8_coeff[0] = h->dequant8_buffer[0];
2042     h->dequant8_coeff[1] = h->dequant8_buffer[1];
2043
2044     for(i=0; i<2; i++ ){
2045         if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
2046             h->dequant8_coeff[1] = h->dequant8_buffer[0];
2047             break;
2048         }
2049
2050         for(q=0; q<52; q++){
2051             int shift = ff_div6[q];
2052             int idx = ff_rem6[q];
2053             for(x=0; x<64; x++)
2054                 h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
2055                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
2056                     h->pps.scaling_matrix8[i][x]) << shift;
2057         }
2058     }
2059 }
2060
2061 static void init_dequant4_coeff_table(H264Context *h){
2062     int i,j,q,x;
2063     const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
2064     for(i=0; i<6; i++ ){
2065         h->dequant4_coeff[i] = h->dequant4_buffer[i];
2066         for(j=0; j<i; j++){
2067             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
2068                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
2069                 break;
2070             }
2071         }
2072         if(j<i)
2073             continue;
2074
2075         for(q=0; q<52; q++){
2076             int shift = ff_div6[q] + 2;
2077             int idx = ff_rem6[q];
2078             for(x=0; x<16; x++)
2079                 h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
2080                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
2081                     h->pps.scaling_matrix4[i][x]) << shift;
2082         }
2083     }
2084 }
2085
2086 static void init_dequant_tables(H264Context *h){
2087     int i,x;
2088     init_dequant4_coeff_table(h);
2089     if(h->pps.transform_8x8_mode)
2090         init_dequant8_coeff_table(h);
2091     if(h->sps.transform_bypass){
2092         for(i=0; i<6; i++)
2093             for(x=0; x<16; x++)
2094                 h->dequant4_coeff[i][0][x] = 1<<6;
2095         if(h->pps.transform_8x8_mode)
2096             for(i=0; i<2; i++)
2097                 for(x=0; x<64; x++)
2098                     h->dequant8_coeff[i][0][x] = 1<<6;
2099     }
2100 }
2101
2102
2103 /**
2104  * allocates tables.
2105  * needs width/height
2106  */
2107 static int alloc_tables(H264Context *h){
2108     MpegEncContext * const s = &h->s;
2109     const int big_mb_num= s->mb_stride * (s->mb_height+1);
2110     int x,y;
2111
2112     CHECKED_ALLOCZ(h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t))
2113
2114     CHECKED_ALLOCZ(h->non_zero_count    , big_mb_num * 16 * sizeof(uint8_t))
2115     CHECKED_ALLOCZ(h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(uint8_t))
2116     CHECKED_ALLOCZ(h->cbp_table, big_mb_num * sizeof(uint16_t))
2117
2118     if( h->pps.cabac ) {
2119         CHECKED_ALLOCZ(h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t))
2120         CHECKED_ALLOCZ(h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t));
2121         CHECKED_ALLOCZ(h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t));
2122         CHECKED_ALLOCZ(h->direct_table, 32*big_mb_num * sizeof(uint8_t));
2123     }
2124
2125     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(uint8_t));
2126     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
2127
2128     CHECKED_ALLOCZ(h->mb2b_xy  , big_mb_num * sizeof(uint32_t));
2129     CHECKED_ALLOCZ(h->mb2b8_xy , big_mb_num * sizeof(uint32_t));
2130     for(y=0; y<s->mb_height; y++){
2131         for(x=0; x<s->mb_width; x++){
2132             const int mb_xy= x + y*s->mb_stride;
2133             const int b_xy = 4*x + 4*y*h->b_stride;
2134             const int b8_xy= 2*x + 2*y*h->b8_stride;
2135
2136             h->mb2b_xy [mb_xy]= b_xy;
2137             h->mb2b8_xy[mb_xy]= b8_xy;
2138         }
2139     }
2140
2141     s->obmc_scratchpad = NULL;
2142
2143     if(!h->dequant4_coeff[0])
2144         init_dequant_tables(h);
2145
2146     return 0;
2147 fail:
2148     free_tables(h);
2149     return -1;
2150 }
2151
2152 /**
2153  * Mimic alloc_tables(), but for every context thread.
2154  */
2155 static void clone_tables(H264Context *dst, H264Context *src){
2156     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
2157     dst->non_zero_count           = src->non_zero_count;
2158     dst->slice_table              = src->slice_table;
2159     dst->cbp_table                = src->cbp_table;
2160     dst->mb2b_xy                  = src->mb2b_xy;
2161     dst->mb2b8_xy                 = src->mb2b8_xy;
2162     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
2163     dst->mvd_table[0]             = src->mvd_table[0];
2164     dst->mvd_table[1]             = src->mvd_table[1];
2165     dst->direct_table             = src->direct_table;
2166
2167     if(!dst->dequant4_coeff[0])
2168         init_dequant_tables(dst);
2169     dst->s.obmc_scratchpad = NULL;
2170     ff_h264_pred_init(&dst->hpc, src->s.codec_id);
2171     dst->dequant_coeff_pps= -1;
2172 }
2173
2174 /**
2175  * Init context
2176  * Allocate buffers which are not shared amongst multiple threads.
2177  */
2178 static int context_init(H264Context *h){
2179     MpegEncContext * const s = &h->s;
2180
2181     CHECKED_ALLOCZ(h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2182     CHECKED_ALLOCZ(h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2183
2184     // edge emu needs blocksize + filter length - 1 (=17x17 for halfpel / 21x21 for h264)
2185     CHECKED_ALLOCZ(s->allocated_edge_emu_buffer,
2186                    (s->width+64)*2*21*2); //(width + edge + align)*interlaced*MBsize*tolerance
2187     s->edge_emu_buffer= s->allocated_edge_emu_buffer + (s->width+64)*2*21;
2188     return 0;
2189 fail:
2190     return -1; // free_tables will clean up for us
2191 }
2192
2193 static void common_init(H264Context *h){
2194     MpegEncContext * const s = &h->s;
2195
2196     s->width = s->avctx->width;
2197     s->height = s->avctx->height;
2198     s->codec_id= s->avctx->codec->id;
2199
2200     ff_h264_pred_init(&h->hpc, s->codec_id);
2201
2202     h->dequant_coeff_pps= -1;
2203     s->unrestricted_mv=1;
2204     s->decode=1; //FIXME
2205
2206     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
2207     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
2208 }
2209
2210 static int decode_init(AVCodecContext *avctx){
2211     H264Context *h= avctx->priv_data;
2212     MpegEncContext * const s = &h->s;
2213
2214     MPV_decode_defaults(s);
2215
2216     s->avctx = avctx;
2217     common_init(h);
2218
2219     s->out_format = FMT_H264;
2220     s->workaround_bugs= avctx->workaround_bugs;
2221
2222     // set defaults
2223 //    s->decode_mb= ff_h263_decode_mb;
2224     s->quarter_sample = 1;
2225     s->low_delay= 1;
2226     avctx->pix_fmt= PIX_FMT_YUV420P;
2227
2228     decode_init_vlc();
2229
2230     if(avctx->extradata_size > 0 && avctx->extradata &&
2231        *(char *)avctx->extradata == 1){
2232         h->is_avc = 1;
2233         h->got_avcC = 0;
2234     } else {
2235         h->is_avc = 0;
2236     }
2237
2238     h->thread_context[0] = h;
2239     return 0;
2240 }
2241
2242 static int frame_start(H264Context *h){
2243     MpegEncContext * const s = &h->s;
2244     int i;
2245
2246     if(MPV_frame_start(s, s->avctx) < 0)
2247         return -1;
2248     ff_er_frame_start(s);
2249
2250     assert(s->linesize && s->uvlinesize);
2251
2252     for(i=0; i<16; i++){
2253         h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
2254         h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
2255     }
2256     for(i=0; i<4; i++){
2257         h->block_offset[16+i]=
2258         h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2259         h->block_offset[24+16+i]=
2260         h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2261     }
2262
2263     /* can't be in alloc_tables because linesize isn't known there.
2264      * FIXME: redo bipred weight to not require extra buffer? */
2265     for(i = 0; i < s->avctx->thread_count; i++)
2266         if(!h->thread_context[i]->s.obmc_scratchpad)
2267             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
2268
2269     /* some macroblocks will be accessed before they're available */
2270     if(FRAME_MBAFF || s->avctx->thread_count > 1)
2271         memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(uint8_t));
2272
2273 //    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
2274     return 0;
2275 }
2276
2277 static inline void backup_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple){
2278     MpegEncContext * const s = &h->s;
2279     int i;
2280
2281     src_y  -=   linesize;
2282     src_cb -= uvlinesize;
2283     src_cr -= uvlinesize;
2284
2285     // There are two lines saved, the line above the the top macroblock of a pair,
2286     // and the line above the bottom macroblock
2287     h->left_border[0]= h->top_borders[0][s->mb_x][15];
2288     for(i=1; i<17; i++){
2289         h->left_border[i]= src_y[15+i*  linesize];
2290     }
2291
2292     *(uint64_t*)(h->top_borders[0][s->mb_x]+0)= *(uint64_t*)(src_y +  16*linesize);
2293     *(uint64_t*)(h->top_borders[0][s->mb_x]+8)= *(uint64_t*)(src_y +8+16*linesize);
2294
2295     if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2296         h->left_border[17  ]= h->top_borders[0][s->mb_x][16+7];
2297         h->left_border[17+9]= h->top_borders[0][s->mb_x][24+7];
2298         for(i=1; i<9; i++){
2299             h->left_border[i+17  ]= src_cb[7+i*uvlinesize];
2300             h->left_border[i+17+9]= src_cr[7+i*uvlinesize];
2301         }
2302         *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+8*uvlinesize);
2303         *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+8*uvlinesize);
2304     }
2305 }
2306
2307 static inline void xchg_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int xchg, int simple){
2308     MpegEncContext * const s = &h->s;
2309     int temp8, i;
2310     uint64_t temp64;
2311     int deblock_left;
2312     int deblock_top;
2313     int mb_xy;
2314
2315     if(h->deblocking_filter == 2) {
2316         mb_xy = s->mb_x + s->mb_y*s->mb_stride;
2317         deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
2318         deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
2319     } else {
2320         deblock_left = (s->mb_x > 0);
2321         deblock_top =  (s->mb_y > 0);
2322     }
2323
2324     src_y  -=   linesize + 1;
2325     src_cb -= uvlinesize + 1;
2326     src_cr -= uvlinesize + 1;
2327
2328 #define XCHG(a,b,t,xchg)\
2329 t= a;\
2330 if(xchg)\
2331     a= b;\
2332 b= t;
2333
2334     if(deblock_left){
2335         for(i = !deblock_top; i<17; i++){
2336             XCHG(h->left_border[i     ], src_y [i*  linesize], temp8, xchg);
2337         }
2338     }
2339
2340     if(deblock_top){
2341         XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2342         XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2343         if(s->mb_x+1 < s->mb_width){
2344             XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2345         }
2346     }
2347
2348     if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2349         if(deblock_left){
2350             for(i = !deblock_top; i<9; i++){
2351                 XCHG(h->left_border[i+17  ], src_cb[i*uvlinesize], temp8, xchg);
2352                 XCHG(h->left_border[i+17+9], src_cr[i*uvlinesize], temp8, xchg);
2353             }
2354         }
2355         if(deblock_top){
2356             XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2357             XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2358         }
2359     }
2360 }
2361
2362 static inline void backup_pair_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize){
2363     MpegEncContext * const s = &h->s;
2364     int i;
2365
2366     src_y  -= 2 *   linesize;
2367     src_cb -= 2 * uvlinesize;
2368     src_cr -= 2 * uvlinesize;
2369
2370     // There are two lines saved, the line above the the top macroblock of a pair,
2371     // and the line above the bottom macroblock
2372     h->left_border[0]= h->top_borders[0][s->mb_x][15];
2373     h->left_border[1]= h->top_borders[1][s->mb_x][15];
2374     for(i=2; i<34; i++){
2375         h->left_border[i]= src_y[15+i*  linesize];
2376     }
2377
2378     *(uint64_t*)(h->top_borders[0][s->mb_x]+0)= *(uint64_t*)(src_y +  32*linesize);
2379     *(uint64_t*)(h->top_borders[0][s->mb_x]+8)= *(uint64_t*)(src_y +8+32*linesize);
2380     *(uint64_t*)(h->top_borders[1][s->mb_x]+0)= *(uint64_t*)(src_y +  33*linesize);
2381     *(uint64_t*)(h->top_borders[1][s->mb_x]+8)= *(uint64_t*)(src_y +8+33*linesize);
2382
2383     if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2384         h->left_border[34     ]= h->top_borders[0][s->mb_x][16+7];
2385         h->left_border[34+   1]= h->top_borders[1][s->mb_x][16+7];
2386         h->left_border[34+18  ]= h->top_borders[0][s->mb_x][24+7];
2387         h->left_border[34+18+1]= h->top_borders[1][s->mb_x][24+7];
2388         for(i=2; i<18; i++){
2389             h->left_border[i+34   ]= src_cb[7+i*uvlinesize];
2390             h->left_border[i+34+18]= src_cr[7+i*uvlinesize];
2391         }
2392         *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+16*uvlinesize);
2393         *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+16*uvlinesize);
2394         *(uint64_t*)(h->top_borders[1][s->mb_x]+16)= *(uint64_t*)(src_cb+17*uvlinesize);
2395         *(uint64_t*)(h->top_borders[1][s->mb_x]+24)= *(uint64_t*)(src_cr+17*uvlinesize);
2396     }
2397 }
2398
2399 static inline void xchg_pair_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int xchg){
2400     MpegEncContext * const s = &h->s;
2401     int temp8, i;
2402     uint64_t temp64;
2403     int deblock_left = (s->mb_x > 0);
2404     int deblock_top  = (s->mb_y > 1);
2405
2406     tprintf(s->avctx, "xchg_pair_border: src_y:%p src_cb:%p src_cr:%p ls:%d uvls:%d\n", src_y, src_cb, src_cr, linesize, uvlinesize);
2407
2408     src_y  -= 2 *   linesize + 1;
2409     src_cb -= 2 * uvlinesize + 1;
2410     src_cr -= 2 * uvlinesize + 1;
2411
2412 #define XCHG(a,b,t,xchg)\
2413 t= a;\
2414 if(xchg)\
2415     a= b;\
2416 b= t;
2417
2418     if(deblock_left){
2419         for(i = (!deblock_top)<<1; i<34; i++){
2420             XCHG(h->left_border[i     ], src_y [i*  linesize], temp8, xchg);
2421         }
2422     }
2423
2424     if(deblock_top){
2425         XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2426         XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2427         XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+0), *(uint64_t*)(src_y +1 +linesize), temp64, xchg);
2428         XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+8), *(uint64_t*)(src_y +9 +linesize), temp64, 1);
2429         if(s->mb_x+1 < s->mb_width){
2430             XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2431             XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x+1]), *(uint64_t*)(src_y +17 +linesize), temp64, 1);
2432         }
2433     }
2434
2435     if(!ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2436         if(deblock_left){
2437             for(i = (!deblock_top) << 1; i<18; i++){
2438                 XCHG(h->left_border[i+34   ], src_cb[i*uvlinesize], temp8, xchg);
2439                 XCHG(h->left_border[i+34+18], src_cr[i*uvlinesize], temp8, xchg);
2440             }
2441         }
2442         if(deblock_top){
2443             XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2444             XCHG(*(uint64_t*)(h->top_borders[0][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2445             XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+16), *(uint64_t*)(src_cb+1 +uvlinesize), temp64, 1);
2446             XCHG(*(uint64_t*)(h->top_borders[1][s->mb_x]+24), *(uint64_t*)(src_cr+1 +uvlinesize), temp64, 1);
2447         }
2448     }
2449 }
2450
2451 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
2452     MpegEncContext * const s = &h->s;
2453     const int mb_x= s->mb_x;
2454     const int mb_y= s->mb_y;
2455     const int mb_xy= mb_x + mb_y*s->mb_stride;
2456     const int mb_type= s->current_picture.mb_type[mb_xy];
2457     uint8_t  *dest_y, *dest_cb, *dest_cr;
2458     int linesize, uvlinesize /*dct_offset*/;
2459     int i;
2460     int *block_offset = &h->block_offset[0];
2461     const unsigned int bottom = mb_y & 1;
2462     const int transform_bypass = (s->qscale == 0 && h->sps.transform_bypass), is_h264 = (simple || s->codec_id == CODEC_ID_H264);
2463     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
2464     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
2465
2466     dest_y  = s->current_picture.data[0] + (mb_y * 16* s->linesize  ) + mb_x * 16;
2467     dest_cb = s->current_picture.data[1] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2468     dest_cr = s->current_picture.data[2] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2469
2470     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
2471     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
2472
2473     if (!simple && MB_FIELD) {
2474         linesize   = h->mb_linesize   = s->linesize * 2;
2475         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2476         block_offset = &h->block_offset[24];
2477         if(mb_y&1){ //FIXME move out of this func?
2478             dest_y -= s->linesize*15;
2479             dest_cb-= s->uvlinesize*7;
2480             dest_cr-= s->uvlinesize*7;
2481         }
2482         if(FRAME_MBAFF) {
2483             int list;
2484             for(list=0; list<h->list_count; list++){
2485                 if(!USES_LIST(mb_type, list))
2486                     continue;
2487                 if(IS_16X16(mb_type)){
2488                     int8_t *ref = &h->ref_cache[list][scan8[0]];
2489                     fill_rectangle(ref, 4, 4, 8, 16+*ref^(s->mb_y&1), 1);
2490                 }else{
2491                     for(i=0; i<16; i+=4){
2492                         //FIXME can refs be smaller than 8x8 when !direct_8x8_inference ?
2493                         int ref = h->ref_cache[list][scan8[i]];
2494                         if(ref >= 0)
2495                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, 16+ref^(s->mb_y&1), 1);
2496                     }
2497                 }
2498             }
2499         }
2500     } else {
2501         linesize   = h->mb_linesize   = s->linesize;
2502         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2503 //        dct_offset = s->linesize * 16;
2504     }
2505
2506     if(transform_bypass){
2507         idct_dc_add =
2508         idct_add = IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
2509     }else if(IS_8x8DCT(mb_type)){
2510         idct_dc_add = s->dsp.h264_idct8_dc_add;
2511         idct_add = s->dsp.h264_idct8_add;
2512     }else{
2513         idct_dc_add = s->dsp.h264_idct_dc_add;
2514         idct_add = s->dsp.h264_idct_add;
2515     }
2516
2517     if(!simple && FRAME_MBAFF && h->deblocking_filter && IS_INTRA(mb_type)
2518        && (!bottom || !IS_INTRA(s->current_picture.mb_type[mb_xy-s->mb_stride]))){
2519         int mbt_y = mb_y&~1;
2520         uint8_t *top_y  = s->current_picture.data[0] + (mbt_y * 16* s->linesize  ) + mb_x * 16;
2521         uint8_t *top_cb = s->current_picture.data[1] + (mbt_y * 8 * s->uvlinesize) + mb_x * 8;
2522         uint8_t *top_cr = s->current_picture.data[2] + (mbt_y * 8 * s->uvlinesize) + mb_x * 8;
2523         xchg_pair_border(h, top_y, top_cb, top_cr, s->linesize, s->uvlinesize, 1);
2524     }
2525
2526     if (!simple && IS_INTRA_PCM(mb_type)) {
2527         unsigned int x, y;
2528
2529         // The pixels are stored in h->mb array in the same order as levels,
2530         // copy them in output in the correct order.
2531         for(i=0; i<16; i++) {
2532             for (y=0; y<4; y++) {
2533                 for (x=0; x<4; x++) {
2534                     *(dest_y + block_offset[i] + y*linesize + x) = h->mb[i*16+y*4+x];
2535                 }
2536             }
2537         }
2538         for(i=16; i<16+4; i++) {
2539             for (y=0; y<4; y++) {
2540                 for (x=0; x<4; x++) {
2541                     *(dest_cb + block_offset[i] + y*uvlinesize + x) = h->mb[i*16+y*4+x];
2542                 }
2543             }
2544         }
2545         for(i=20; i<20+4; i++) {
2546             for (y=0; y<4; y++) {
2547                 for (x=0; x<4; x++) {
2548                     *(dest_cr + block_offset[i] + y*uvlinesize + x) = h->mb[i*16+y*4+x];
2549                 }
2550             }
2551         }
2552     } else {
2553         if(IS_INTRA(mb_type)){
2554             if(h->deblocking_filter && (simple || !FRAME_MBAFF))
2555                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
2556
2557             if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2558                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
2559                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2560             }
2561
2562             if(IS_INTRA4x4(mb_type)){
2563                 if(simple || !s->encoding){
2564                     if(IS_8x8DCT(mb_type)){
2565                         for(i=0; i<16; i+=4){
2566                             uint8_t * const ptr= dest_y + block_offset[i];
2567                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2568                             const int nnz = h->non_zero_count_cache[ scan8[i] ];
2569                             h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
2570                                                    (h->topright_samples_available<<i)&0x4000, linesize);
2571                             if(nnz){
2572                                 if(nnz == 1 && h->mb[i*16])
2573                                     idct_dc_add(ptr, h->mb + i*16, linesize);
2574                                 else
2575                                     idct_add(ptr, h->mb + i*16, linesize);
2576                             }
2577                         }
2578                     }else
2579                     for(i=0; i<16; i++){
2580                         uint8_t * const ptr= dest_y + block_offset[i];
2581                         uint8_t *topright;
2582                         const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2583                         int nnz, tr;
2584
2585                         if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
2586                             const int topright_avail= (h->topright_samples_available<<i)&0x8000;
2587                             assert(mb_y || linesize <= block_offset[i]);
2588                             if(!topright_avail){
2589                                 tr= ptr[3 - linesize]*0x01010101;
2590                                 topright= (uint8_t*) &tr;
2591                             }else
2592                                 topright= ptr + 4 - linesize;
2593                         }else
2594                             topright= NULL;
2595
2596                         h->hpc.pred4x4[ dir ](ptr, topright, linesize);
2597                         nnz = h->non_zero_count_cache[ scan8[i] ];
2598                         if(nnz){
2599                             if(is_h264){
2600                                 if(nnz == 1 && h->mb[i*16])
2601                                     idct_dc_add(ptr, h->mb + i*16, linesize);
2602                                 else
2603                                     idct_add(ptr, h->mb + i*16, linesize);
2604                             }else
2605                                 svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
2606                         }
2607                     }
2608                 }
2609             }else{
2610                 h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
2611                 if(is_h264){
2612                     if(!transform_bypass)
2613                         h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[IS_INTRA(mb_type) ? 0:3][s->qscale][0]);
2614                 }else
2615                     svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
2616             }
2617             if(h->deblocking_filter && (simple || !FRAME_MBAFF))
2618                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
2619         }else if(is_h264){
2620             hl_motion(h, dest_y, dest_cb, dest_cr,
2621                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2622                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2623                       s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
2624         }
2625
2626
2627         if(!IS_INTRA4x4(mb_type)){
2628             if(is_h264){
2629                 if(IS_INTRA16x16(mb_type)){
2630                     for(i=0; i<16; i++){
2631                         if(h->non_zero_count_cache[ scan8[i] ])
2632                             idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2633                         else if(h->mb[i*16])
2634                             idct_dc_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2635                     }
2636                 }else{
2637                     const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2638                     for(i=0; i<16; i+=di){
2639                         int nnz = h->non_zero_count_cache[ scan8[i] ];
2640                         if(nnz){
2641                             if(nnz==1 && h->mb[i*16])
2642                                 idct_dc_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2643                             else
2644                                 idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2645                         }
2646                     }
2647                 }
2648             }else{
2649                 for(i=0; i<16; i++){
2650                     if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
2651                         uint8_t * const ptr= dest_y + block_offset[i];
2652                         svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
2653                     }
2654                 }
2655             }
2656         }
2657
2658         if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2659             uint8_t *dest[2] = {dest_cb, dest_cr};
2660             if(transform_bypass){
2661                 idct_add = idct_dc_add = s->dsp.add_pixels4;
2662             }else{
2663                 idct_add = s->dsp.h264_idct_add;
2664                 idct_dc_add = s->dsp.h264_idct_dc_add;
2665                 chroma_dc_dequant_idct_c(h->mb + 16*16, h->chroma_qp[0], h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]);
2666                 chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->chroma_qp[1], h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]);
2667             }
2668             if(is_h264){
2669                 for(i=16; i<16+8; i++){
2670                     if(h->non_zero_count_cache[ scan8[i] ])
2671                         idct_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2672                     else if(h->mb[i*16])
2673                         idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2674                 }
2675             }else{
2676                 for(i=16; i<16+8; i++){
2677                     if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
2678                         uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
2679                         svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, chroma_qp[s->qscale + 12] - 12, 2);
2680                     }
2681                 }
2682             }
2683         }
2684     }
2685     if(h->deblocking_filter) {
2686         if (!simple && FRAME_MBAFF) {
2687             //FIXME try deblocking one mb at a time?
2688             // the reduction in load/storing mvs and such might outweigh the extra backup/xchg_border
2689             const int mb_y = s->mb_y - 1;
2690             uint8_t  *pair_dest_y, *pair_dest_cb, *pair_dest_cr;
2691             const int mb_xy= mb_x + mb_y*s->mb_stride;
2692             const int mb_type_top   = s->current_picture.mb_type[mb_xy];
2693             const int mb_type_bottom= s->current_picture.mb_type[mb_xy+s->mb_stride];
2694             if (!bottom) return;
2695             pair_dest_y  = s->current_picture.data[0] + (mb_y * 16* s->linesize  ) + mb_x * 16;
2696             pair_dest_cb = s->current_picture.data[1] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2697             pair_dest_cr = s->current_picture.data[2] + (mb_y * 8 * s->uvlinesize) + mb_x * 8;
2698
2699             if(IS_INTRA(mb_type_top | mb_type_bottom))
2700                 xchg_pair_border(h, pair_dest_y, pair_dest_cb, pair_dest_cr, s->linesize, s->uvlinesize, 0);
2701
2702             backup_pair_border(h, pair_dest_y, pair_dest_cb, pair_dest_cr, s->linesize, s->uvlinesize);
2703             // deblock a pair
2704             // top
2705             s->mb_y--;
2706             tprintf(h->s.avctx, "call mbaff filter_mb mb_x:%d mb_y:%d pair_dest_y = %p, dest_y = %p\n", mb_x, mb_y, pair_dest_y, dest_y);
2707             fill_caches(h, mb_type_top, 1); //FIXME don't fill stuff which isn't used by filter_mb
2708             h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2709             h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2710             filter_mb(h, mb_x, mb_y, pair_dest_y, pair_dest_cb, pair_dest_cr, linesize, uvlinesize);
2711             // bottom
2712             s->mb_y++;
2713             tprintf(h->s.avctx, "call mbaff filter_mb\n");
2714             fill_caches(h, mb_type_bottom, 1); //FIXME don't fill stuff which isn't used by filter_mb
2715             h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy+s->mb_stride]);
2716             h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy+s->mb_stride]);
2717             filter_mb(h, mb_x, mb_y+1, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2718         } else {
2719             tprintf(h->s.avctx, "call filter_mb\n");
2720             backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
2721             fill_caches(h, mb_type, 1); //FIXME don't fill stuff which isn't used by filter_mb
2722             filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2723         }
2724     }
2725 }
2726
2727 /**
2728  * Process a macroblock; this case avoids checks for expensive uncommon cases.
2729  */
2730 static void hl_decode_mb_simple(H264Context *h){
2731     hl_decode_mb_internal(h, 1);
2732 }
2733
2734 /**
2735  * Process a macroblock; this handles edge cases, such as interlacing.
2736  */
2737 static void av_noinline hl_decode_mb_complex(H264Context *h){
2738     hl_decode_mb_internal(h, 0);
2739 }
2740
2741 static void hl_decode_mb(H264Context *h){
2742     MpegEncContext * const s = &h->s;
2743     const int mb_x= s->mb_x;
2744     const int mb_y= s->mb_y;
2745     const int mb_xy= mb_x + mb_y*s->mb_stride;
2746     const int mb_type= s->current_picture.mb_type[mb_xy];
2747     int is_complex = FRAME_MBAFF || MB_FIELD || IS_INTRA_PCM(mb_type) || s->codec_id != CODEC_ID_H264 || (ENABLE_GRAY && (s->flags&CODEC_FLAG_GRAY)) || s->encoding;
2748
2749     if(!s->decode)
2750         return;
2751
2752     if (is_complex)
2753         hl_decode_mb_complex(h);
2754     else hl_decode_mb_simple(h);
2755 }
2756
2757 /**
2758  * fills the default_ref_list.
2759  */
2760 static int fill_default_ref_list(H264Context *h){
2761     MpegEncContext * const s = &h->s;
2762     int i;
2763     int smallest_poc_greater_than_current = -1;
2764     Picture sorted_short_ref[32];
2765
2766     if(h->slice_type==B_TYPE){
2767         int out_i;
2768         int limit= INT_MIN;
2769
2770         /* sort frame according to poc in B slice */
2771         for(out_i=0; out_i<h->short_ref_count; out_i++){
2772             int best_i=INT_MIN;
2773             int best_poc=INT_MAX;
2774
2775             for(i=0; i<h->short_ref_count; i++){
2776                 const int poc= h->short_ref[i]->poc;
2777                 if(poc > limit && poc < best_poc){
2778                     best_poc= poc;
2779                     best_i= i;
2780                 }
2781             }
2782
2783             assert(best_i != INT_MIN);
2784
2785             limit= best_poc;
2786             sorted_short_ref[out_i]= *h->short_ref[best_i];
2787             tprintf(h->s.avctx, "sorted poc: %d->%d poc:%d fn:%d\n", best_i, out_i, sorted_short_ref[out_i].poc, sorted_short_ref[out_i].frame_num);
2788             if (-1 == smallest_poc_greater_than_current) {
2789                 if (h->short_ref[best_i]->poc >= s->current_picture_ptr->poc) {
2790                     smallest_poc_greater_than_current = out_i;
2791                 }
2792             }
2793         }
2794     }
2795
2796     if(s->picture_structure == PICT_FRAME){
2797         if(h->slice_type==B_TYPE){
2798             int list;
2799             tprintf(h->s.avctx, "current poc: %d, smallest_poc_greater_than_current: %d\n", s->current_picture_ptr->poc, smallest_poc_greater_than_current);
2800
2801             // find the largest poc
2802             for(list=0; list<2; list++){
2803                 int index = 0;
2804                 int j= -99;
2805                 int step= list ? -1 : 1;
2806
2807                 for(i=0; i<h->short_ref_count && index < h->ref_count[list]; i++, j+=step) {
2808                     while(j<0 || j>= h->short_ref_count){
2809                         if(j != -99 && step == (list ? -1 : 1))
2810                             return -1;
2811                         step = -step;
2812                         j= smallest_poc_greater_than_current + (step>>1);
2813                     }
2814                     if(sorted_short_ref[j].reference != 3) continue;
2815                     h->default_ref_list[list][index  ]= sorted_short_ref[j];
2816                     h->default_ref_list[list][index++].pic_id= sorted_short_ref[j].frame_num;
2817                 }
2818
2819                 for(i = 0; i < 16 && index < h->ref_count[ list ]; i++){
2820                     if(h->long_ref[i] == NULL) continue;
2821                     if(h->long_ref[i]->reference != 3) continue;
2822
2823                     h->default_ref_list[ list ][index  ]= *h->long_ref[i];
2824                     h->default_ref_list[ list ][index++].pic_id= i;;
2825                 }
2826
2827                 if(list && (smallest_poc_greater_than_current<=0 || smallest_poc_greater_than_current>=h->short_ref_count) && (1 < index)){
2828                     // swap the two first elements of L1 when
2829                     // L0 and L1 are identical
2830                     Picture temp= h->default_ref_list[1][0];
2831                     h->default_ref_list[1][0] = h->default_ref_list[1][1];
2832                     h->default_ref_list[1][1] = temp;
2833                 }
2834
2835                 if(index < h->ref_count[ list ])
2836                     memset(&h->default_ref_list[list][index], 0, sizeof(Picture)*(h->ref_count[ list ] - index));
2837             }
2838         }else{
2839             int index=0;
2840             for(i=0; i<h->short_ref_count; i++){
2841                 if(h->short_ref[i]->reference != 3) continue; //FIXME refernce field shit
2842                 h->default_ref_list[0][index  ]= *h->short_ref[i];
2843                 h->default_ref_list[0][index++].pic_id= h->short_ref[i]->frame_num;
2844             }
2845             for(i = 0; i < 16; i++){
2846                 if(h->long_ref[i] == NULL) continue;
2847                 if(h->long_ref[i]->reference != 3) continue;
2848                 h->default_ref_list[0][index  ]= *h->long_ref[i];
2849                 h->default_ref_list[0][index++].pic_id= i;;
2850             }
2851             if(index < h->ref_count[0])
2852                 memset(&h->default_ref_list[0][index], 0, sizeof(Picture)*(h->ref_count[0] - index));
2853         }
2854     }else{ //FIELD
2855         if(h->slice_type==B_TYPE){
2856         }else{
2857             //FIXME second field balh
2858         }
2859     }
2860 #ifdef TRACE
2861     for (i=0; i<h->ref_count[0]; i++) {
2862         tprintf(h->s.avctx, "List0: %s fn:%d 0x%p\n", (h->default_ref_list[0][i].long_ref ? "LT" : "ST"), h->default_ref_list[0][i].pic_id, h->default_ref_list[0][i].data[0]);
2863     }
2864     if(h->slice_type==B_TYPE){
2865         for (i=0; i<h->ref_count[1]; i++) {
2866             tprintf(h->s.avctx, "List1: %s fn:%d 0x%p\n", (h->default_ref_list[1][i].long_ref ? "LT" : "ST"), h->default_ref_list[1][i].pic_id, h->default_ref_list[0][i].data[0]);
2867         }
2868     }
2869 #endif
2870     return 0;
2871 }
2872
2873 static void print_short_term(H264Context *h);
2874 static void print_long_term(H264Context *h);
2875
2876 static int decode_ref_pic_list_reordering(H264Context *h){
2877     MpegEncContext * const s = &h->s;
2878     int list, index;
2879
2880     print_short_term(h);
2881     print_long_term(h);
2882     if(h->slice_type==I_TYPE || h->slice_type==SI_TYPE) return 0; //FIXME move before func
2883
2884     for(list=0; list<h->list_count; list++){
2885         memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
2886
2887         if(get_bits1(&s->gb)){
2888             int pred= h->curr_pic_num;
2889
2890             for(index=0; ; index++){
2891                 unsigned int reordering_of_pic_nums_idc= get_ue_golomb(&s->gb);
2892                 unsigned int pic_id;
2893                 int i;
2894                 Picture *ref = NULL;
2895
2896                 if(reordering_of_pic_nums_idc==3)
2897                     break;
2898
2899                 if(index >= h->ref_count[list]){
2900                     av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
2901                     return -1;
2902                 }
2903
2904                 if(reordering_of_pic_nums_idc<3){
2905                     if(reordering_of_pic_nums_idc<2){
2906                         const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
2907
2908                         if(abs_diff_pic_num >= h->max_pic_num){
2909                             av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
2910                             return -1;
2911                         }
2912
2913                         if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
2914                         else                                pred+= abs_diff_pic_num;
2915                         pred &= h->max_pic_num - 1;
2916
2917                         for(i= h->short_ref_count-1; i>=0; i--){
2918                             ref = h->short_ref[i];
2919                             assert(ref->reference == 3);
2920                             assert(!ref->long_ref);
2921                             if(ref->data[0] != NULL && ref->frame_num == pred && ref->long_ref == 0) // ignore non existing pictures by testing data[0] pointer
2922                                 break;
2923                         }
2924                         if(i>=0)
2925                             ref->pic_id= ref->frame_num;
2926                     }else{
2927                         pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx
2928                         if(pic_id>31){
2929                             av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
2930                             return -1;
2931                         }
2932                         ref = h->long_ref[pic_id];
2933                         if(ref){
2934                             ref->pic_id= pic_id;
2935                             assert(ref->reference == 3);
2936                             assert(ref->long_ref);
2937                             i=0;
2938                         }else{
2939                             i=-1;
2940                         }
2941                     }
2942
2943                     if (i < 0) {
2944                         av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
2945                         memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME
2946                     } else {
2947                         for(i=index; i+1<h->ref_count[list]; i++){
2948                             if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
2949                                 break;
2950                         }
2951                         for(; i > index; i--){
2952                             h->ref_list[list][i]= h->ref_list[list][i-1];
2953                         }
2954                         h->ref_list[list][index]= *ref;
2955                     }
2956                 }else{
2957                     av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
2958                     return -1;
2959                 }
2960             }
2961         }
2962     }
2963     for(list=0; list<h->list_count; list++){
2964         for(index= 0; index < h->ref_count[list]; index++){
2965             if(!h->ref_list[list][index].data[0])
2966                 h->ref_list[list][index]= s->current_picture;
2967         }
2968     }
2969
2970     if(h->slice_type==B_TYPE && !h->direct_spatial_mv_pred)
2971         direct_dist_scale_factor(h);
2972     direct_ref_list_init(h);
2973     return 0;
2974 }
2975
2976 static void fill_mbaff_ref_list(H264Context *h){
2977     int list, i, j;
2978     for(list=0; list<2; list++){ //FIXME try list_count
2979         for(i=0; i<h->ref_count[list]; i++){
2980             Picture *frame = &h->ref_list[list][i];
2981             Picture *field = &h->ref_list[list][16+2*i];
2982             field[0] = *frame;
2983             for(j=0; j<3; j++)
2984                 field[0].linesize[j] <<= 1;
2985             field[1] = field[0];
2986             for(j=0; j<3; j++)
2987                 field[1].data[j] += frame->linesize[j];
2988
2989             h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
2990             h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
2991             for(j=0; j<2; j++){
2992                 h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
2993                 h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
2994             }
2995         }
2996     }
2997     for(j=0; j<h->ref_count[1]; j++){
2998         for(i=0; i<h->ref_count[0]; i++)
2999             h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
3000         memcpy(h->implicit_weight[16+2*j],   h->implicit_weight[j], sizeof(*h->implicit_weight));
3001         memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
3002     }
3003 }
3004
3005 static int pred_weight_table(H264Context *h){
3006     MpegEncContext * const s = &h->s;
3007     int list, i;
3008     int luma_def, chroma_def;
3009
3010     h->use_weight= 0;
3011     h->use_weight_chroma= 0;
3012     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
3013     h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
3014     luma_def = 1<<h->luma_log2_weight_denom;
3015     chroma_def = 1<<h->chroma_log2_weight_denom;
3016
3017     for(list=0; list<2; list++){
3018         for(i=0; i<h->ref_count[list]; i++){
3019             int luma_weight_flag, chroma_weight_flag;
3020
3021             luma_weight_flag= get_bits1(&s->gb);
3022             if(luma_weight_flag){
3023                 h->luma_weight[list][i]= get_se_golomb(&s->gb);
3024                 h->luma_offset[list][i]= get_se_golomb(&s->gb);
3025                 if(   h->luma_weight[list][i] != luma_def
3026                    || h->luma_offset[list][i] != 0)
3027                     h->use_weight= 1;
3028             }else{
3029                 h->luma_weight[list][i]= luma_def;
3030                 h->luma_offset[list][i]= 0;
3031             }
3032
3033             chroma_weight_flag= get_bits1(&s->gb);
3034             if(chroma_weight_flag){
3035                 int j;
3036                 for(j=0; j<2; j++){
3037                     h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
3038                     h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
3039                     if(   h->chroma_weight[list][i][j] != chroma_def
3040                        || h->chroma_offset[list][i][j] != 0)
3041                         h->use_weight_chroma= 1;
3042                 }
3043             }else{
3044                 int j;
3045                 for(j=0; j<2; j++){
3046                     h->chroma_weight[list][i][j]= chroma_def;
3047                     h->chroma_offset[list][i][j]= 0;
3048                 }
3049             }
3050         }
3051         if(h->slice_type != B_TYPE) break;
3052     }
3053     h->use_weight= h->use_weight || h->use_weight_chroma;
3054     return 0;
3055 }
3056
3057 static void implicit_weight_table(H264Context *h){
3058     MpegEncContext * const s = &h->s;
3059     int ref0, ref1;
3060     int cur_poc = s->current_picture_ptr->poc;
3061
3062     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
3063        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
3064         h->use_weight= 0;
3065         h->use_weight_chroma= 0;
3066         return;
3067     }
3068
3069     h->use_weight= 2;
3070     h->use_weight_chroma= 2;
3071     h->luma_log2_weight_denom= 5;
3072     h->chroma_log2_weight_denom= 5;
3073
3074     for(ref0=0; ref0 < h->ref_count[0]; ref0++){
3075         int poc0 = h->ref_list[0][ref0].poc;
3076         for(ref1=0; ref1 < h->ref_count[1]; ref1++){
3077             int poc1 = h->ref_list[1][ref1].poc;
3078             int td = av_clip(poc1 - poc0, -128, 127);
3079             if(td){
3080                 int tb = av_clip(cur_poc - poc0, -128, 127);
3081                 int tx = (16384 + (FFABS(td) >> 1)) / td;
3082                 int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
3083                 if(dist_scale_factor < -64 || dist_scale_factor > 128)
3084                     h->implicit_weight[ref0][ref1] = 32;
3085                 else
3086                     h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
3087             }else
3088                 h->implicit_weight[ref0][ref1] = 32;
3089         }
3090     }
3091 }
3092
3093 static inline void unreference_pic(H264Context *h, Picture *pic){
3094     int i;
3095     pic->reference=0;
3096     if(pic == h->delayed_output_pic)
3097         pic->reference=1;
3098     else{
3099         for(i = 0; h->delayed_pic[i]; i++)
3100             if(pic == h->delayed_pic[i]){
3101                 pic->reference=1;
3102                 break;
3103             }
3104     }
3105 }
3106
3107 /**
3108  * instantaneous decoder refresh.
3109  */
3110 static void idr(H264Context *h){
3111     int i;
3112
3113     for(i=0; i<16; i++){
3114         if (h->long_ref[i] != NULL) {
3115             unreference_pic(h, h->long_ref[i]);
3116             h->long_ref[i]= NULL;
3117         }
3118     }
3119     h->long_ref_count=0;
3120
3121     for(i=0; i<h->short_ref_count; i++){
3122         unreference_pic(h, h->short_ref[i]);
3123         h->short_ref[i]= NULL;
3124     }
3125     h->short_ref_count=0;
3126 }
3127
3128 /* forget old pics after a seek */
3129 static void flush_dpb(AVCodecContext *avctx){
3130     H264Context *h= avctx->priv_data;
3131     int i;
3132     for(i=0; i<16; i++) {
3133         if(h->delayed_pic[i])
3134             h->delayed_pic[i]->reference= 0;
3135         h->delayed_pic[i]= NULL;
3136     }
3137     if(h->delayed_output_pic)
3138         h->delayed_output_pic->reference= 0;
3139     h->delayed_output_pic= NULL;
3140     idr(h);
3141     if(h->s.current_picture_ptr)
3142         h->s.current_picture_ptr->reference= 0;
3143 }
3144
3145 /**
3146  *
3147  * @return the removed picture or NULL if an error occurs
3148  */
3149 static Picture * remove_short(H264Context *h, int frame_num){
3150     MpegEncContext * const s = &h->s;
3151     int i;
3152
3153     if(s->avctx->debug&FF_DEBUG_MMCO)
3154         av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
3155
3156     for(i=0; i<h->short_ref_count; i++){
3157         Picture *pic= h->short_ref[i];
3158         if(s->avctx->debug&FF_DEBUG_MMCO)
3159             av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
3160         if(pic->frame_num == frame_num){
3161             h->short_ref[i]= NULL;
3162             memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i - 1)*sizeof(Picture*));
3163             h->short_ref_count--;
3164             return pic;
3165         }
3166     }
3167     return NULL;
3168 }
3169
3170 /**
3171  *
3172  * @return the removed picture or NULL if an error occurs
3173  */
3174 static Picture * remove_long(H264Context *h, int i){
3175     Picture *pic;
3176
3177     pic= h->long_ref[i];
3178     h->long_ref[i]= NULL;
3179     if(pic) h->long_ref_count--;
3180
3181     return pic;
3182 }
3183
3184 /**
3185  * print short term list
3186  */
3187 static void print_short_term(H264Context *h) {
3188     uint32_t i;
3189     if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3190         av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
3191         for(i=0; i<h->short_ref_count; i++){
3192             Picture *pic= h->short_ref[i];
3193             av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3194         }
3195     }
3196 }
3197
3198 /**
3199  * print long term list
3200  */
3201 static void print_long_term(H264Context *h) {
3202     uint32_t i;
3203     if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3204         av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
3205         for(i = 0; i < 16; i++){
3206             Picture *pic= h->long_ref[i];
3207             if (pic) {
3208                 av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3209             }
3210         }
3211     }
3212 }
3213
3214 /**
3215  * Executes the reference picture marking (memory management control operations).
3216  */
3217 static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
3218     MpegEncContext * const s = &h->s;
3219     int i, j;
3220     int current_is_long=0;
3221     Picture *pic;
3222
3223     if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
3224         av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
3225
3226     for(i=0; i<mmco_count; i++){
3227         if(s->avctx->debug&FF_DEBUG_MMCO)
3228             av_log(h->s.avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode, h->mmco[i].short_frame_num, h->mmco[i].long_index);
3229
3230         switch(mmco[i].opcode){
3231         case MMCO_SHORT2UNUSED:
3232             pic= remove_short(h, mmco[i].short_frame_num);
3233             if(pic)
3234                 unreference_pic(h, pic);
3235             else if(s->avctx->debug&FF_DEBUG_MMCO)
3236                 av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: remove_short() failure\n");
3237             break;
3238         case MMCO_SHORT2LONG:
3239             pic= remove_long(h, mmco[i].long_index);
3240             if(pic) unreference_pic(h, pic);
3241
3242             h->long_ref[ mmco[i].long_index ]= remove_short(h, mmco[i].short_frame_num);
3243             if (h->long_ref[ mmco[i].long_index ]){
3244                 h->long_ref[ mmco[i].long_index ]->long_ref=1;
3245                 h->long_ref_count++;
3246             }
3247             break;
3248         case MMCO_LONG2UNUSED:
3249             pic= remove_long(h, mmco[i].long_index);
3250             if(pic)
3251                 unreference_pic(h, pic);
3252             else if(s->avctx->debug&FF_DEBUG_MMCO)
3253                 av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: remove_long() failure\n");
3254             break;
3255         case MMCO_LONG:
3256             pic= remove_long(h, mmco[i].long_index);
3257             if(pic) unreference_pic(h, pic);
3258
3259             h->long_ref[ mmco[i].long_index ]= s->current_picture_ptr;
3260             h->long_ref[ mmco[i].long_index ]->long_ref=1;
3261             h->long_ref_count++;
3262
3263             current_is_long=1;
3264             break;
3265         case MMCO_SET_MAX_LONG:
3266             assert(mmco[i].long_index <= 16);
3267             // just remove the long term which index is greater than new max
3268             for(j = mmco[i].long_index; j<16; j++){
3269                 pic = remove_long(h, j);
3270                 if (pic) unreference_pic(h, pic);
3271             }
3272             break;
3273         case MMCO_RESET:
3274             while(h->short_ref_count){
3275                 pic= remove_short(h, h->short_ref[0]->frame_num);
3276                 if(pic) unreference_pic(h, pic);
3277             }
3278             for(j = 0; j < 16; j++) {
3279                 pic= remove_long(h, j);
3280                 if(pic) unreference_pic(h, pic);
3281             }
3282             break;
3283         default: assert(0);
3284         }
3285     }
3286
3287     if(!current_is_long){
3288         pic= remove_short(h, s->current_picture_ptr->frame_num);
3289         if(pic){
3290             unreference_pic(h, pic);
3291             av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
3292         }
3293
3294         if(h->short_ref_count)
3295             memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
3296
3297         h->short_ref[0]= s->current_picture_ptr;
3298         h->short_ref[0]->long_ref=0;
3299         h->short_ref_count++;
3300     }
3301
3302     print_short_term(h);
3303     print_long_term(h);
3304     return 0;
3305 }
3306
3307 static int decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
3308     MpegEncContext * const s = &h->s;
3309     int i;
3310
3311     if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
3312         s->broken_link= get_bits1(gb) -1;
3313         h->mmco[0].long_index= get_bits1(gb) - 1; // current_long_term_idx
3314         if(h->mmco[0].long_index == -1)
3315             h->mmco_index= 0;
3316         else{
3317             h->mmco[0].opcode= MMCO_LONG;
3318             h->mmco_index= 1;
3319         }
3320     }else{
3321         if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag
3322             for(i= 0; i<MAX_MMCO_COUNT; i++) {
3323                 MMCOOpcode opcode= get_ue_golomb(gb);
3324
3325                 h->mmco[i].opcode= opcode;
3326                 if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
3327                     h->mmco[i].short_frame_num= (h->frame_num - get_ue_golomb(gb) - 1) & ((1<<h->sps.log2_max_frame_num)-1); //FIXME fields
3328 /*                    if(h->mmco[i].short_frame_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_frame_num ] == NULL){
3329                         av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco);
3330                         return -1;
3331                     }*/
3332                 }
3333                 if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
3334                     unsigned int long_index= get_ue_golomb(gb);
3335                     if(/*h->mmco[i].long_index >= h->long_ref_count || h->long_ref[ h->mmco[i].long_index ] == NULL*/ long_index >= 16){
3336                         av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
3337                         return -1;
3338                     }
3339                     h->mmco[i].long_index= long_index;
3340                 }
3341
3342                 if(opcode > (unsigned)MMCO_LONG){
3343                     av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
3344                     return -1;
3345                 }
3346                 if(opcode == MMCO_END)
3347                     break;
3348             }
3349             h->mmco_index= i;
3350         }else{
3351             assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
3352
3353             if(h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count){ //FIXME fields
3354                 h->mmco[0].opcode= MMCO_SHORT2UNUSED;
3355                 h->mmco[0].short_frame_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
3356                 h->mmco_index= 1;
3357             }else
3358                 h->mmco_index= 0;
3359         }
3360     }
3361
3362     return 0;
3363 }
3364
3365 static int init_poc(H264Context *h){
3366     MpegEncContext * const s = &h->s;
3367     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
3368     int field_poc[2];
3369
3370     if(h->nal_unit_type == NAL_IDR_SLICE){
3371         h->frame_num_offset= 0;
3372     }else{
3373         if(h->frame_num < h->prev_frame_num)
3374             h->frame_num_offset= h->prev_frame_num_offset + max_frame_num;
3375         else
3376             h->frame_num_offset= h->prev_frame_num_offset;
3377     }
3378
3379     if(h->sps.poc_type==0){
3380         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
3381
3382         if(h->nal_unit_type == NAL_IDR_SLICE){
3383              h->prev_poc_msb=
3384              h->prev_poc_lsb= 0;
3385         }
3386
3387         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
3388             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
3389         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
3390             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
3391         else
3392             h->poc_msb = h->prev_poc_msb;
3393 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
3394         field_poc[0] =
3395         field_poc[1] = h->poc_msb + h->poc_lsb;
3396         if(s->picture_structure == PICT_FRAME)
3397             field_poc[1] += h->delta_poc_bottom;
3398     }else if(h->sps.poc_type==1){
3399         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
3400         int i;
3401
3402         if(h->sps.poc_cycle_length != 0)
3403             abs_frame_num = h->frame_num_offset + h->frame_num;
3404         else
3405             abs_frame_num = 0;
3406
3407         if(h->nal_ref_idc==0 && abs_frame_num > 0)
3408             abs_frame_num--;
3409
3410         expected_delta_per_poc_cycle = 0;
3411         for(i=0; i < h->sps.poc_cycle_length; i++)
3412             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
3413
3414         if(abs_frame_num > 0){
3415             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
3416             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
3417
3418             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
3419             for(i = 0; i <= frame_num_in_poc_cycle; i++)
3420                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
3421         } else
3422             expectedpoc = 0;
3423
3424         if(h->nal_ref_idc == 0)
3425             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
3426
3427         field_poc[0] = expectedpoc + h->delta_poc[0];
3428         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
3429
3430         if(s->picture_structure == PICT_FRAME)
3431             field_poc[1] += h->delta_poc[1];
3432     }else{
3433         int poc;
3434         if(h->nal_unit_type == NAL_IDR_SLICE){
3435             poc= 0;
3436         }else{
3437             if(h->nal_ref_idc) poc= 2*(h->frame_num_offset + h->frame_num);
3438             else               poc= 2*(h->frame_num_offset + h->frame_num) - 1;
3439         }
3440         field_poc[0]= poc;
3441         field_poc[1]= poc;
3442     }
3443
3444     if(s->picture_structure != PICT_BOTTOM_FIELD)
3445         s->current_picture_ptr->field_poc[0]= field_poc[0];
3446     if(s->picture_structure != PICT_TOP_FIELD)
3447         s->current_picture_ptr->field_poc[1]= field_poc[1];
3448     if(s->picture_structure == PICT_FRAME) // FIXME field pix?
3449         s->current_picture_ptr->poc= FFMIN(field_poc[0], field_poc[1]);
3450
3451     return 0;
3452 }
3453
3454
3455 /**
3456  * initialize scan tables
3457  */
3458 static void init_scan_tables(H264Context *h){
3459     MpegEncContext * const s = &h->s;
3460     int i;
3461     if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
3462         memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
3463         memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
3464     }else{
3465         for(i=0; i<16; i++){
3466 #define T(x) (x>>2) | ((x<<2) & 0xF)
3467             h->zigzag_scan[i] = T(zigzag_scan[i]);
3468             h-> field_scan[i] = T( field_scan[i]);
3469 #undef T
3470         }
3471     }
3472     if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
3473         memcpy(h->zigzag_scan8x8,       zigzag_scan8x8,       64*sizeof(uint8_t));
3474         memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
3475         memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
3476         memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
3477     }else{
3478         for(i=0; i<64; i++){
3479 #define T(x) (x>>3) | ((x&7)<<3)
3480             h->zigzag_scan8x8[i]       = T(zigzag_scan8x8[i]);
3481             h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
3482             h->field_scan8x8[i]        = T(field_scan8x8[i]);
3483             h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
3484 #undef T
3485         }
3486     }
3487     if(h->sps.transform_bypass){ //FIXME same ugly
3488         h->zigzag_scan_q0          = zigzag_scan;
3489         h->zigzag_scan8x8_q0       = zigzag_scan8x8;
3490         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
3491         h->field_scan_q0           = field_scan;
3492         h->field_scan8x8_q0        = field_scan8x8;
3493         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
3494     }else{
3495         h->zigzag_scan_q0          = h->zigzag_scan;
3496         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
3497         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
3498         h->field_scan_q0           = h->field_scan;
3499         h->field_scan8x8_q0        = h->field_scan8x8;
3500         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
3501     }
3502 }
3503
3504 /**
3505  * Replicates H264 "master" context to thread contexts.
3506  */
3507 static void clone_slice(H264Context *dst, H264Context *src)
3508 {
3509     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
3510     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
3511     dst->s.current_picture      = src->s.current_picture;
3512     dst->s.linesize             = src->s.linesize;
3513     dst->s.uvlinesize           = src->s.uvlinesize;
3514
3515     dst->prev_poc_msb           = src->prev_poc_msb;
3516     dst->prev_poc_lsb           = src->prev_poc_lsb;
3517     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
3518     dst->prev_frame_num         = src->prev_frame_num;
3519     dst->short_ref_count        = src->short_ref_count;
3520
3521     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
3522     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
3523     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
3524     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
3525 }
3526
3527 /**
3528  * decodes a slice header.
3529  * this will allso call MPV_common_init() and frame_start() as needed
3530  *
3531  * @param h h264context
3532  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
3533  *
3534  * @return 0 if okay, <0 if an error occured, 1 if decoding must not be multithreaded
3535  */
3536 static int decode_slice_header(H264Context *h, H264Context *h0){
3537     MpegEncContext * const s = &h->s;
3538     unsigned int first_mb_in_slice;
3539     unsigned int pps_id;
3540     int num_ref_idx_active_override_flag;
3541     static const uint8_t slice_type_map[5]= {P_TYPE, B_TYPE, I_TYPE, SP_TYPE, SI_TYPE};
3542     unsigned int slice_type, tmp, i;
3543     int default_ref_list_done = 0;
3544
3545     s->current_picture.reference= h->nal_ref_idc != 0;
3546     s->dropable= h->nal_ref_idc == 0;
3547
3548     first_mb_in_slice= get_ue_golomb(&s->gb);
3549
3550     if((s->flags2 & CODEC_FLAG2_CHUNKS) && first_mb_in_slice == 0){
3551         h0->current_slice = 0;
3552         s->current_picture_ptr= NULL;
3553     }
3554
3555     slice_type= get_ue_golomb(&s->gb);
3556     if(slice_type > 9){
3557         av_log(h->s.avctx, AV_LOG_ERROR, "slice type too large (%d) at %d %d\n", h->slice_type, s->mb_x, s->mb_y);
3558         return -1;
3559     }
3560     if(slice_type > 4){
3561         slice_type -= 5;
3562         h->slice_type_fixed=1;
3563     }else
3564         h->slice_type_fixed=0;
3565
3566     slice_type= slice_type_map[ slice_type ];
3567     if (slice_type == I_TYPE
3568         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
3569         default_ref_list_done = 1;
3570     }
3571     h->slice_type= slice_type;
3572
3573     s->pict_type= h->slice_type; // to make a few old func happy, it's wrong though
3574
3575     pps_id= get_ue_golomb(&s->gb);
3576     if(pps_id>=MAX_PPS_COUNT){
3577         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
3578         return -1;
3579     }
3580     if(!h0->pps_buffers[pps_id]) {
3581         av_log(h->s.avctx, AV_LOG_ERROR, "non existing PPS referenced\n");
3582         return -1;
3583     }
3584     h->pps= *h0->pps_buffers[pps_id];
3585
3586     if(!h0->sps_buffers[h->pps.sps_id]) {
3587         av_log(h->s.avctx, AV_LOG_ERROR, "non existing SPS referenced\n");
3588         return -1;
3589     }
3590     h->sps = *h0->sps_buffers[h->pps.sps_id];
3591
3592     if(h->dequant_coeff_pps != pps_id){
3593         h->dequant_coeff_pps = pps_id;
3594         init_dequant_tables(h);
3595     }
3596
3597     s->mb_width= h->sps.mb_width;
3598     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3599
3600     h->b_stride=  s->mb_width*4;
3601     h->b8_stride= s->mb_width*2;
3602
3603     s->width = 16*s->mb_width - 2*(h->sps.crop_left + h->sps.crop_right );
3604     if(h->sps.frame_mbs_only_flag)
3605         s->height= 16*s->mb_height - 2*(h->sps.crop_top  + h->sps.crop_bottom);
3606     else
3607         s->height= 16*s->mb_height - 4*(h->sps.crop_top  + h->sps.crop_bottom); //FIXME recheck
3608
3609     if (s->context_initialized
3610         && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
3611         if(h != h0)
3612             return -1;   // width / height changed during parallelized decoding
3613         free_tables(h);
3614         MPV_common_end(s);
3615     }
3616     if (!s->context_initialized) {
3617         if(h != h0)
3618             return -1;  // we cant (re-)initialize context during parallel decoding
3619         if (MPV_common_init(s) < 0)
3620             return -1;
3621
3622         init_scan_tables(h);
3623         alloc_tables(h);
3624
3625         for(i = 1; i < s->avctx->thread_count; i++) {
3626             H264Context *c;
3627             c = h->thread_context[i] = av_malloc(sizeof(H264Context));
3628             memcpy(c, h, sizeof(MpegEncContext));
3629             memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
3630             c->sps = h->sps;
3631             c->pps = h->pps;
3632             init_scan_tables(c);
3633             clone_tables(c, h);
3634         }
3635
3636         for(i = 0; i < s->avctx->thread_count; i++)
3637             if(context_init(h->thread_context[i]) < 0)
3638                 return -1;
3639
3640         s->avctx->width = s->width;
3641         s->avctx->height = s->height;
3642         s->avctx->sample_aspect_ratio= h->sps.sar;
3643         if(!s->avctx->sample_aspect_ratio.den)
3644             s->avctx->sample_aspect_ratio.den = 1;
3645
3646         if(h->sps.timing_info_present_flag){
3647             s->avctx->time_base= (AVRational){h->sps.num_units_in_tick * 2, h->sps.time_scale};
3648             if(h->x264_build > 0 && h->x264_build < 44)
3649                 s->avctx->time_base.den *= 2;
3650             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
3651                       s->avctx->time_base.num, s->avctx->time_base.den, 1<<30);
3652         }
3653     }
3654
3655     if(h0->current_slice == 0){
3656         if(frame_start(h) < 0)
3657             return -1;
3658     }
3659     if(h != h0)
3660         clone_slice(h, h0);
3661
3662     s->current_picture_ptr->frame_num= //FIXME frame_num cleanup
3663     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
3664
3665     h->mb_mbaff = 0;
3666     h->mb_aff_frame = 0;
3667     if(h->sps.frame_mbs_only_flag){
3668         s->picture_structure= PICT_FRAME;
3669     }else{
3670         if(get_bits1(&s->gb)) { //field_pic_flag
3671             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
3672             av_log(h->s.avctx, AV_LOG_ERROR, "PAFF interlacing is not implemented\n");
3673         } else {
3674             s->picture_structure= PICT_FRAME;
3675             h->mb_aff_frame = h->sps.mb_aff;
3676         }
3677     }
3678     assert(s->mb_num == s->mb_width * s->mb_height);
3679     if(first_mb_in_slice << h->mb_aff_frame >= s->mb_num ||
3680        first_mb_in_slice                    >= s->mb_num){
3681         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
3682         return -1;
3683     }
3684     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
3685     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << h->mb_aff_frame;
3686     assert(s->mb_y < s->mb_height);
3687
3688     if(s->picture_structure==PICT_FRAME){
3689         h->curr_pic_num=   h->frame_num;
3690         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
3691     }else{
3692         h->curr_pic_num= 2*h->frame_num;
3693         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
3694     }
3695
3696     if(h->nal_unit_type == NAL_IDR_SLICE){
3697         get_ue_golomb(&s->gb); /* idr_pic_id */
3698     }
3699
3700     if(h->sps.poc_type==0){
3701         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3702
3703         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
3704             h->delta_poc_bottom= get_se_golomb(&s->gb);
3705         }
3706     }
3707
3708     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
3709         h->delta_poc[0]= get_se_golomb(&s->gb);
3710
3711         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
3712             h->delta_poc[1]= get_se_golomb(&s->gb);
3713     }
3714
3715     init_poc(h);
3716
3717     if(h->pps.redundant_pic_cnt_present){
3718         h->redundant_pic_count= get_ue_golomb(&s->gb);
3719     }
3720
3721     //set defaults, might be overriden a few line later
3722     h->ref_count[0]= h->pps.ref_count[0];
3723     h->ref_count[1]= h->pps.ref_count[1];
3724
3725     if(h->slice_type == P_TYPE || h->slice_type == SP_TYPE || h->slice_type == B_TYPE){
3726         if(h->slice_type == B_TYPE){
3727             h->direct_spatial_mv_pred= get_bits1(&s->gb);
3728             if(h->sps.mb_aff && h->direct_spatial_mv_pred)
3729                 av_log(h->s.avctx, AV_LOG_ERROR, "MBAFF + spatial direct mode is not implemented\n");
3730         }
3731         num_ref_idx_active_override_flag= get_bits1(&s->gb);
3732
3733         if(num_ref_idx_active_override_flag){
3734             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3735             if(h->slice_type==B_TYPE)
3736                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
3737
3738             if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
3739                 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3740                 h->ref_count[0]= h->ref_count[1]= 1;
3741                 return -1;
3742             }
3743         }
3744         if(h->slice_type == B_TYPE)
3745             h->list_count= 2;
3746         else
3747             h->list_count= 1;
3748     }else
3749         h->list_count= 0;
3750
3751     if(!default_ref_list_done){
3752         fill_default_ref_list(h);
3753     }
3754
3755     if(decode_ref_pic_list_reordering(h) < 0)
3756         return -1;
3757
3758     if(   (h->pps.weighted_pred          && (h->slice_type == P_TYPE || h->slice_type == SP_TYPE ))
3759        || (h->pps.weighted_bipred_idc==1 && h->slice_type==B_TYPE ) )
3760         pred_weight_table(h);
3761     else if(h->pps.weighted_bipred_idc==2 && h->slice_type==B_TYPE)
3762         implicit_weight_table(h);
3763     else
3764         h->use_weight = 0;
3765
3766     if(s->current_picture.reference)
3767         decode_ref_pic_marking(h0, &s->gb);
3768
3769     if(FRAME_MBAFF)
3770         fill_mbaff_ref_list(h);
3771
3772     if( h->slice_type != I_TYPE && h->slice_type != SI_TYPE && h->pps.cabac ){
3773         tmp = get_ue_golomb(&s->gb);
3774         if(tmp > 2){
3775             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3776             return -1;
3777         }
3778         h->cabac_init_idc= tmp;
3779     }
3780
3781     h->last_qscale_diff = 0;
3782     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
3783     if(tmp>51){
3784         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3785         return -1;
3786     }
3787     s->qscale= tmp;
3788     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3789     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3790     //FIXME qscale / qp ... stuff
3791     if(h->slice_type == SP_TYPE){
3792         get_bits1(&s->gb); /* sp_for_switch_flag */
3793     }
3794     if(h->slice_type==SP_TYPE || h->slice_type == SI_TYPE){
3795         get_se_golomb(&s->gb); /* slice_qs_delta */
3796     }
3797
3798     h->deblocking_filter = 1;
3799     h->slice_alpha_c0_offset = 0;
3800     h->slice_beta_offset = 0;
3801     if( h->pps.deblocking_filter_parameters_present ) {
3802         tmp= get_ue_golomb(&s->gb);
3803         if(tmp > 2){
3804             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
3805             return -1;
3806         }
3807         h->deblocking_filter= tmp;
3808         if(h->deblocking_filter < 2)
3809             h->deblocking_filter^= 1; // 1<->0
3810
3811         if( h->deblocking_filter ) {
3812             h->slice_alpha_c0_offset = get_se_golomb(&s->gb) << 1;
3813             h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
3814         }
3815     }
3816
3817     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
3818         h0->max_contexts = 1;
3819         if(!h0->single_decode_warning) {
3820             av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
3821             h0->single_decode_warning = 1;
3822         }
3823         if(h != h0)
3824             return 1; // deblocking switched inside frame
3825     }
3826
3827     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
3828        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type != I_TYPE)
3829        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type == B_TYPE)
3830        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
3831         h->deblocking_filter= 0;
3832
3833 #if 0 //FMO
3834     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
3835         slice_group_change_cycle= get_bits(&s->gb, ?);
3836 #endif
3837
3838     h0->last_slice_type = slice_type;
3839     h->slice_num = ++h0->current_slice;
3840
3841     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
3842     h->emu_edge_height= FRAME_MBAFF ? 0 : h->emu_edge_width;
3843
3844     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
3845         av_log(h->s.avctx, AV_LOG_DEBUG, "slice:%d %s mb:%d %c pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s\n",
3846                h->slice_num,
3847                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
3848                first_mb_in_slice,
3849                av_get_pict_type_char(h->slice_type),
3850                pps_id, h->frame_num,
3851                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
3852                h->ref_count[0], h->ref_count[1],
3853                s->qscale,
3854                h->deblocking_filter, h->slice_alpha_c0_offset/2, h->slice_beta_offset/2,
3855                h->use_weight,
3856                h->use_weight==1 && h->use_weight_chroma ? "c" : ""
3857                );
3858     }
3859
3860     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !s->current_picture.reference){
3861         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
3862         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
3863     }else{
3864         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
3865         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
3866     }
3867
3868     return 0;
3869 }
3870
3871 /**
3872  *
3873  */
3874 static inline int get_level_prefix(GetBitContext *gb){
3875     unsigned int buf;
3876     int log;
3877
3878     OPEN_READER(re, gb);
3879     UPDATE_CACHE(re, gb);
3880     buf=GET_CACHE(re, gb);
3881
3882     log= 32 - av_log2(buf);
3883 #ifdef TRACE
3884     print_bin(buf>>(32-log), log);
3885     av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__);
3886 #endif
3887
3888     LAST_SKIP_BITS(re, gb, log);
3889     CLOSE_READER(re, gb);
3890
3891     return log-1;
3892 }
3893
3894 static inline int get_dct8x8_allowed(H264Context *h){
3895     int i;
3896     for(i=0; i<4; i++){
3897         if(!IS_SUB_8X8(h->sub_mb_type[i])
3898            || (!h->sps.direct_8x8_inference_flag && IS_DIRECT(h->sub_mb_type[i])))
3899             return 0;
3900     }
3901     return 1;
3902 }
3903
3904 /**
3905  * decodes a residual block.
3906  * @param n block index
3907  * @param scantable scantable
3908  * @param max_coeff number of coefficients in the block
3909  * @return <0 if an error occured
3910  */
3911 static int decode_residual(H264Context *h, GetBitContext *gb, DCTELEM *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){
3912     MpegEncContext * const s = &h->s;
3913     static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3};
3914     int level[16];
3915     int zeros_left, coeff_num, coeff_token, total_coeff, i, j, trailing_ones, run_before;
3916
3917     //FIXME put trailing_onex into the context
3918
3919     if(n == CHROMA_DC_BLOCK_INDEX){
3920         coeff_token= get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1);
3921         total_coeff= coeff_token>>2;
3922     }else{
3923         if(n == LUMA_DC_BLOCK_INDEX){
3924             total_coeff= pred_non_zero_count(h, 0);
3925             coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
3926             total_coeff= coeff_token>>2;
3927         }else{
3928             total_coeff= pred_non_zero_count(h, n);
3929             coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2);
3930             total_coeff= coeff_token>>2;
3931             h->non_zero_count_cache[ scan8[n] ]= total_coeff;
3932         }
3933     }
3934
3935     //FIXME set last_non_zero?
3936
3937     if(total_coeff==0)
3938         return 0;
3939     if(total_coeff > (unsigned)max_coeff) {
3940         av_log(h->s.avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", s->mb_x, s->mb_y, total_coeff);
3941         return -1;
3942     }
3943
3944     trailing_ones= coeff_token&3;
3945     tprintf(h->s.avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff);
3946     assert(total_coeff<=16);
3947
3948     for(i=0; i<trailing_ones; i++){
3949         level[i]= 1 - 2*get_bits1(gb);
3950     }
3951
3952     if(i<total_coeff) {
3953         int level_code, mask;
3954         int suffix_length = total_coeff > 10 && trailing_ones < 3;
3955         int prefix= get_level_prefix(gb);
3956
3957         //first coefficient has suffix_length equal to 0 or 1
3958         if(prefix<14){ //FIXME try to build a large unified VLC table for all this
3959             if(suffix_length)
3960                 level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
3961             else
3962                 level_code= (prefix<<suffix_length); //part
3963         }else if(prefix==14){
3964             if(suffix_length)
3965                 level_code= (prefix<<suffix_length) + get_bits(gb, suffix_length); //part
3966             else
3967                 level_code= prefix + get_bits(gb, 4); //part
3968         }else if(prefix==15){
3969             level_code= (prefix<<suffix_length) + get_bits(gb, 12); //part
3970             if(suffix_length==0) level_code+=15; //FIXME doesn't make (much)sense
3971         }else{
3972             av_log(h->s.avctx, AV_LOG_ERROR, "prefix too large at %d %d\n", s->mb_x, s->mb_y);
3973             return -1;
3974         }
3975
3976         if(trailing_ones < 3) level_code += 2;
3977
3978         suffix_length = 1;
3979         if(level_code > 5)
3980             suffix_length++;
3981         mask= -(level_code&1);
3982         level[i]= (((2+level_code)>>1) ^ mask) - mask;
3983         i++;
3984
3985         //remaining coefficients have suffix_length > 0
3986         for(;i<total_coeff;i++) {
3987             static const int suffix_limit[7] = {0,5,11,23,47,95,INT_MAX };
3988             prefix = get_level_prefix(gb);
3989             if(prefix<15){
3990                 level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length);
3991             }else if(prefix==15){
3992                 level_code =  (prefix<<suffix_length) + get_bits(gb, 12);
3993             }else{
3994                 av_log(h->s.avctx, AV_LOG_ERROR, "prefix too large at %d %d\n", s->mb_x, s->mb_y);
3995                 return -1;
3996             }
3997             mask= -(level_code&1);
3998             level[i]= (((2+level_code)>>1) ^ mask) - mask;
3999             if(level_code > suffix_limit[suffix_length])
4000                 suffix_length++;
4001         }
4002     }
4003
4004     if(total_coeff == max_coeff)
4005         zeros_left=0;
4006     else{
4007         if(n == CHROMA_DC_BLOCK_INDEX)
4008             zeros_left= get_vlc2(gb, chroma_dc_total_zeros_vlc[ total_coeff-1 ].table, CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1);
4009         else
4010             zeros_left= get_vlc2(gb, total_zeros_vlc[ total_coeff-1 ].table, TOTAL_ZEROS_VLC_BITS, 1);
4011     }
4012
4013     coeff_num = zeros_left + total_coeff - 1;
4014     j = scantable[coeff_num];
4015     if(n > 24){
4016         block[j] = level[0];
4017         for(i=1;i<total_coeff;i++) {
4018             if(zeros_left <= 0)
4019                 run_before = 0;
4020             else if(zeros_left < 7){
4021                 run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4022             }else{
4023                 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4024             }
4025             zeros_left -= run_before;
4026             coeff_num -= 1 + run_before;
4027             j= scantable[ coeff_num ];
4028
4029             block[j]= level[i];
4030         }
4031     }else{
4032         block[j] = (level[0] * qmul[j] + 32)>>6;
4033         for(i=1;i<total_coeff;i++) {
4034             if(zeros_left <= 0)
4035                 run_before = 0;
4036             else if(zeros_left < 7){
4037                 run_before= get_vlc2(gb, run_vlc[zeros_left-1].table, RUN_VLC_BITS, 1);
4038             }else{
4039                 run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2);
4040             }
4041             zeros_left -= run_before;
4042             coeff_num -= 1 + run_before;
4043             j= scantable[ coeff_num ];
4044
4045             block[j]= (level[i] * qmul[j] + 32)>>6;
4046         }
4047     }
4048
4049     if(zeros_left<0){
4050         av_log(h->s.avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", s->mb_x, s->mb_y);
4051         return -1;
4052     }
4053
4054     return 0;
4055 }
4056
4057 static void predict_field_decoding_flag(H264Context *h){
4058     MpegEncContext * const s = &h->s;
4059     const int mb_xy= s->mb_x + s->mb_y*s->mb_stride;
4060     int&nbs