64824a43e44103cc3bc7830fac8db6aa7114011e
[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 #include "rectangle.h"
36
37 #include "cabac.h"
38 #ifdef ARCH_X86
39 #include "i386/h264_i386.h"
40 #endif
41
42 //#undef NDEBUG
43 #include <assert.h>
44
45 /**
46  * Value of Picture.reference when Picture is not a reference picture, but
47  * is held for delayed output.
48  */
49 #define DELAYED_PIC_REF 4
50
51 static VLC coeff_token_vlc[4];
52 static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2];
53 static const int coeff_token_vlc_tables_size[4]={520,332,280,256};
54
55 static VLC chroma_dc_coeff_token_vlc;
56 static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2];
57 static const int chroma_dc_coeff_token_vlc_table_size = 256;
58
59 static VLC total_zeros_vlc[15];
60 static VLC_TYPE total_zeros_vlc_tables[15][512][2];
61 static const int total_zeros_vlc_tables_size = 512;
62
63 static VLC chroma_dc_total_zeros_vlc[3];
64 static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2];
65 static const int chroma_dc_total_zeros_vlc_tables_size = 8;
66
67 static VLC run_vlc[6];
68 static VLC_TYPE run_vlc_tables[6][8][2];
69 static const int run_vlc_tables_size = 8;
70
71 static VLC run7_vlc;
72 static VLC_TYPE run7_vlc_table[96][2];
73 static const int run7_vlc_table_size = 96;
74
75 static void svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
76 static void svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
77 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);
78 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);
79 static Picture * remove_long(H264Context *h, int i, int ref_mask);
80
81 static av_always_inline uint32_t pack16to32(int a, int b){
82 #ifdef WORDS_BIGENDIAN
83    return (b&0xFFFF) + (a<<16);
84 #else
85    return (a&0xFFFF) + (b<<16);
86 #endif
87 }
88
89 static const uint8_t rem6[52]={
90 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,
91 };
92
93 static const uint8_t div6[52]={
94 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,
95 };
96
97 static const int left_block_options[4][8]={
98     {0,1,2,3,7,10,8,11},
99     {2,2,3,3,8,11,8,11},
100     {0,0,1,1,7,10,7,10},
101     {0,2,0,2,7,10,7,10}
102 };
103
104 static void fill_caches(H264Context *h, int mb_type, int for_deblock){
105     MpegEncContext * const s = &h->s;
106     const int mb_xy= h->mb_xy;
107     int topleft_xy, top_xy, topright_xy, left_xy[2];
108     int topleft_type, top_type, topright_type, left_type[2];
109     const int * left_block;
110     int topleft_partition= -1;
111     int i;
112
113     top_xy     = mb_xy  - (s->mb_stride << FIELD_PICTURE);
114
115     //FIXME deblocking could skip the intra and nnz parts.
116     if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[top_xy]) && !FRAME_MBAFF)
117         return;
118
119     /* Wow, what a mess, why didn't they simplify the interlacing & intra
120      * stuff, I can't imagine that these complex rules are worth it. */
121
122     topleft_xy = top_xy - 1;
123     topright_xy= top_xy + 1;
124     left_xy[1] = left_xy[0] = mb_xy-1;
125     left_block = left_block_options[0];
126     if(FRAME_MBAFF){
127         const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
128         const int top_pair_xy      = pair_xy     - s->mb_stride;
129         const int topleft_pair_xy  = top_pair_xy - 1;
130         const int topright_pair_xy = top_pair_xy + 1;
131         const int topleft_mb_frame_flag  = !IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
132         const int top_mb_frame_flag      = !IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
133         const int topright_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
134         const int left_mb_frame_flag = !IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
135         const int curr_mb_frame_flag = !IS_INTERLACED(mb_type);
136         const int bottom = (s->mb_y & 1);
137         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);
138         if (bottom
139                 ? !curr_mb_frame_flag // bottom macroblock
140                 : (!curr_mb_frame_flag && !top_mb_frame_flag) // top macroblock
141                 ) {
142             top_xy -= s->mb_stride;
143         }
144         if (bottom
145                 ? !curr_mb_frame_flag // bottom macroblock
146                 : (!curr_mb_frame_flag && !topleft_mb_frame_flag) // top macroblock
147                 ) {
148             topleft_xy -= s->mb_stride;
149         } else if(bottom && curr_mb_frame_flag && !left_mb_frame_flag) {
150             topleft_xy += s->mb_stride;
151             // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
152             topleft_partition = 0;
153         }
154         if (bottom
155                 ? !curr_mb_frame_flag // bottom macroblock
156                 : (!curr_mb_frame_flag && !topright_mb_frame_flag) // top macroblock
157                 ) {
158             topright_xy -= s->mb_stride;
159         }
160         if (left_mb_frame_flag != curr_mb_frame_flag) {
161             left_xy[1] = left_xy[0] = pair_xy - 1;
162             if (curr_mb_frame_flag) {
163                 if (bottom) {
164                     left_block = left_block_options[1];
165                 } else {
166                     left_block= left_block_options[2];
167                 }
168             } else {
169                 left_xy[1] += s->mb_stride;
170                 left_block = left_block_options[3];
171             }
172         }
173     }
174
175     h->top_mb_xy = top_xy;
176     h->left_mb_xy[0] = left_xy[0];
177     h->left_mb_xy[1] = left_xy[1];
178     if(for_deblock){
179         topleft_type = 0;
180         topright_type = 0;
181         top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
182         left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
183         left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
184
185         if(MB_MBAFF && !IS_INTRA(mb_type)){
186             int list;
187             for(list=0; list<h->list_count; list++){
188                 //These values where changed for ease of performing MC, we need to change them back
189                 //FIXME maybe we can make MC and loop filter use the same values or prevent
190                 //the MC code from changing ref_cache and rather use a temporary array.
191                 if(USES_LIST(mb_type,list)){
192                     int8_t *ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
193                     *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
194                     *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
195                     ref += h->b8_stride;
196                     *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
197                     *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
198                 }
199             }
200         }
201     }else{
202         topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
203         top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
204         topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
205         left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
206         left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
207
208     if(IS_INTRA(mb_type)){
209         int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
210         h->topleft_samples_available=
211         h->top_samples_available=
212         h->left_samples_available= 0xFFFF;
213         h->topright_samples_available= 0xEEEA;
214
215         if(!(top_type & type_mask)){
216             h->topleft_samples_available= 0xB3FF;
217             h->top_samples_available= 0x33FF;
218             h->topright_samples_available= 0x26EA;
219         }
220         if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
221             if(IS_INTERLACED(mb_type)){
222                 if(!(left_type[0] & type_mask)){
223                     h->topleft_samples_available&= 0xDFFF;
224                     h->left_samples_available&= 0x5FFF;
225                 }
226                 if(!(left_type[1] & type_mask)){
227                     h->topleft_samples_available&= 0xFF5F;
228                     h->left_samples_available&= 0xFF5F;
229                 }
230             }else{
231                 int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
232                                 ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
233                 assert(left_xy[0] == left_xy[1]);
234                 if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
235                     h->topleft_samples_available&= 0xDF5F;
236                     h->left_samples_available&= 0x5F5F;
237                 }
238             }
239         }else{
240             if(!(left_type[0] & type_mask)){
241                 h->topleft_samples_available&= 0xDF5F;
242                 h->left_samples_available&= 0x5F5F;
243             }
244         }
245
246         if(!(topleft_type & type_mask))
247             h->topleft_samples_available&= 0x7FFF;
248
249         if(!(topright_type & type_mask))
250             h->topright_samples_available&= 0xFBFF;
251
252         if(IS_INTRA4x4(mb_type)){
253             if(IS_INTRA4x4(top_type)){
254                 h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
255                 h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
256                 h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
257                 h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
258             }else{
259                 int pred;
260                 if(!(top_type & type_mask))
261                     pred= -1;
262                 else{
263                     pred= 2;
264                 }
265                 h->intra4x4_pred_mode_cache[4+8*0]=
266                 h->intra4x4_pred_mode_cache[5+8*0]=
267                 h->intra4x4_pred_mode_cache[6+8*0]=
268                 h->intra4x4_pred_mode_cache[7+8*0]= pred;
269             }
270             for(i=0; i<2; i++){
271                 if(IS_INTRA4x4(left_type[i])){
272                     h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
273                     h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
274                 }else{
275                     int pred;
276                     if(!(left_type[i] & type_mask))
277                         pred= -1;
278                     else{
279                         pred= 2;
280                     }
281                     h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
282                     h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
283                 }
284             }
285         }
286     }
287     }
288
289
290 /*
291 0 . T T. T T T T
292 1 L . .L . . . .
293 2 L . .L . . . .
294 3 . T TL . . . .
295 4 L . .L . . . .
296 5 L . .. . . . .
297 */
298 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
299     if(top_type){
300         h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
301         h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
302         h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
303         h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
304
305         h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
306         h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
307
308         h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
309         h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
310
311     }else{
312         h->non_zero_count_cache[4+8*0]=
313         h->non_zero_count_cache[5+8*0]=
314         h->non_zero_count_cache[6+8*0]=
315         h->non_zero_count_cache[7+8*0]=
316
317         h->non_zero_count_cache[1+8*0]=
318         h->non_zero_count_cache[2+8*0]=
319
320         h->non_zero_count_cache[1+8*3]=
321         h->non_zero_count_cache[2+8*3]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
322
323     }
324
325     for (i=0; i<2; i++) {
326         if(left_type[i]){
327             h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
328             h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
329             h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
330             h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
331         }else{
332             h->non_zero_count_cache[3+8*1 + 2*8*i]=
333             h->non_zero_count_cache[3+8*2 + 2*8*i]=
334             h->non_zero_count_cache[0+8*1 +   8*i]=
335             h->non_zero_count_cache[0+8*4 +   8*i]= h->pps.cabac && !IS_INTRA(mb_type) ? 0 : 64;
336         }
337     }
338
339     if( h->pps.cabac ) {
340         // top_cbp
341         if(top_type) {
342             h->top_cbp = h->cbp_table[top_xy];
343         } else if(IS_INTRA(mb_type)) {
344             h->top_cbp = 0x1C0;
345         } else {
346             h->top_cbp = 0;
347         }
348         // left_cbp
349         if (left_type[0]) {
350             h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
351         } else if(IS_INTRA(mb_type)) {
352             h->left_cbp = 0x1C0;
353         } else {
354             h->left_cbp = 0;
355         }
356         if (left_type[0]) {
357             h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
358         }
359         if (left_type[1]) {
360             h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
361         }
362     }
363
364 #if 1
365     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
366         int list;
367         for(list=0; list<h->list_count; list++){
368             if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
369                 /*if(!h->mv_cache_clean[list]){
370                     memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
371                     memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
372                     h->mv_cache_clean[list]= 1;
373                 }*/
374                 continue;
375             }
376             h->mv_cache_clean[list]= 0;
377
378             if(USES_LIST(top_type, list)){
379                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
380                 const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
381                 *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
382                 *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
383                 *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
384                 *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
385                 h->ref_cache[list][scan8[0] + 0 - 1*8]=
386                 h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
387                 h->ref_cache[list][scan8[0] + 2 - 1*8]=
388                 h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
389             }else{
390                 *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
391                 *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
392                 *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
393                 *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
394                 *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
395             }
396
397             for(i=0; i<2; i++){
398                 int cache_idx = scan8[0] - 1 + i*2*8;
399                 if(USES_LIST(left_type[i], list)){
400                     const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
401                     const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
402                     *(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]];
403                     *(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]];
404                     h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
405                     h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
406                 }else{
407                     *(uint32_t*)h->mv_cache [list][cache_idx  ]=
408                     *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
409                     h->ref_cache[list][cache_idx  ]=
410                     h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
411                 }
412             }
413
414             if(for_deblock || ((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred) && !FRAME_MBAFF))
415                 continue;
416
417             if(USES_LIST(topleft_type, list)){
418                 const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
419                 const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
420                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
421                 h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
422             }else{
423                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
424                 h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
425             }
426
427             if(USES_LIST(topright_type, list)){
428                 const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
429                 const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
430                 *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
431                 h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
432             }else{
433                 *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
434                 h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
435             }
436
437             if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
438                 continue;
439
440             h->ref_cache[list][scan8[5 ]+1] =
441             h->ref_cache[list][scan8[7 ]+1] =
442             h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
443             h->ref_cache[list][scan8[4 ]] =
444             h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
445             *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
446             *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
447             *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
448             *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
449             *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
450
451             if( h->pps.cabac ) {
452                 /* XXX beurk, Load mvd */
453                 if(USES_LIST(top_type, list)){
454                     const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
455                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
456                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
457                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
458                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
459                 }else{
460                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
461                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
462                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
463                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
464                 }
465                 if(USES_LIST(left_type[0], list)){
466                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
467                     *(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]];
468                     *(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]];
469                 }else{
470                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
471                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
472                 }
473                 if(USES_LIST(left_type[1], list)){
474                     const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
475                     *(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]];
476                     *(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]];
477                 }else{
478                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
479                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
480                 }
481                 *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
482                 *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
483                 *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
484                 *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
485                 *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
486
487                 if(h->slice_type_nos == FF_B_TYPE){
488                     fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
489
490                     if(IS_DIRECT(top_type)){
491                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
492                     }else if(IS_8X8(top_type)){
493                         int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
494                         h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
495                         h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
496                     }else{
497                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
498                     }
499
500                     if(IS_DIRECT(left_type[0]))
501                         h->direct_cache[scan8[0] - 1 + 0*8]= 1;
502                     else if(IS_8X8(left_type[0]))
503                         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)];
504                     else
505                         h->direct_cache[scan8[0] - 1 + 0*8]= 0;
506
507                     if(IS_DIRECT(left_type[1]))
508                         h->direct_cache[scan8[0] - 1 + 2*8]= 1;
509                     else if(IS_8X8(left_type[1]))
510                         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)];
511                     else
512                         h->direct_cache[scan8[0] - 1 + 2*8]= 0;
513                 }
514             }
515
516             if(FRAME_MBAFF){
517 #define MAP_MVS\
518                     MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
519                     MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
520                     MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
521                     MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
522                     MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
523                     MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
524                     MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
525                     MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
526                     MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
527                     MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
528                 if(MB_FIELD){
529 #define MAP_F2F(idx, mb_type)\
530                     if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
531                         h->ref_cache[list][idx] <<= 1;\
532                         h->mv_cache[list][idx][1] /= 2;\
533                         h->mvd_cache[list][idx][1] /= 2;\
534                     }
535                     MAP_MVS
536 #undef MAP_F2F
537                 }else{
538 #define MAP_F2F(idx, mb_type)\
539                     if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
540                         h->ref_cache[list][idx] >>= 1;\
541                         h->mv_cache[list][idx][1] <<= 1;\
542                         h->mvd_cache[list][idx][1] <<= 1;\
543                     }
544                     MAP_MVS
545 #undef MAP_F2F
546                 }
547             }
548         }
549     }
550 #endif
551
552     h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
553 }
554
555 static inline void write_back_intra_pred_mode(H264Context *h){
556     const int mb_xy= h->mb_xy;
557
558     h->intra4x4_pred_mode[mb_xy][0]= h->intra4x4_pred_mode_cache[7+8*1];
559     h->intra4x4_pred_mode[mb_xy][1]= h->intra4x4_pred_mode_cache[7+8*2];
560     h->intra4x4_pred_mode[mb_xy][2]= h->intra4x4_pred_mode_cache[7+8*3];
561     h->intra4x4_pred_mode[mb_xy][3]= h->intra4x4_pred_mode_cache[7+8*4];
562     h->intra4x4_pred_mode[mb_xy][4]= h->intra4x4_pred_mode_cache[4+8*4];
563     h->intra4x4_pred_mode[mb_xy][5]= h->intra4x4_pred_mode_cache[5+8*4];
564     h->intra4x4_pred_mode[mb_xy][6]= h->intra4x4_pred_mode_cache[6+8*4];
565 }
566
567 /**
568  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
569  */
570 static inline int check_intra4x4_pred_mode(H264Context *h){
571     MpegEncContext * const s = &h->s;
572     static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
573     static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
574     int i;
575
576     if(!(h->top_samples_available&0x8000)){
577         for(i=0; i<4; i++){
578             int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
579             if(status<0){
580                 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);
581                 return -1;
582             } else if(status){
583                 h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
584             }
585         }
586     }
587
588     if((h->left_samples_available&0x8888)!=0x8888){
589         static const int mask[4]={0x8000,0x2000,0x80,0x20};
590         for(i=0; i<4; i++){
591             if(!(h->left_samples_available&mask[i])){
592             int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
593             if(status<0){
594                 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);
595                 return -1;
596             } else if(status){
597                 h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
598             }
599             }
600         }
601     }
602
603     return 0;
604 } //FIXME cleanup like next
605
606 /**
607  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
608  */
609 static inline int check_intra_pred_mode(H264Context *h, int mode){
610     MpegEncContext * const s = &h->s;
611     static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
612     static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
613
614     if(mode > 6U) {
615         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);
616         return -1;
617     }
618
619     if(!(h->top_samples_available&0x8000)){
620         mode= top[ mode ];
621         if(mode<0){
622             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);
623             return -1;
624         }
625     }
626
627     if((h->left_samples_available&0x8080) != 0x8080){
628         mode= left[ mode ];
629         if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
630             mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
631         }
632         if(mode<0){
633             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);
634             return -1;
635         }
636     }
637
638     return mode;
639 }
640
641 /**
642  * gets the predicted intra4x4 prediction mode.
643  */
644 static inline int pred_intra_mode(H264Context *h, int n){
645     const int index8= scan8[n];
646     const int left= h->intra4x4_pred_mode_cache[index8 - 1];
647     const int top = h->intra4x4_pred_mode_cache[index8 - 8];
648     const int min= FFMIN(left, top);
649
650     tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
651
652     if(min<0) return DC_PRED;
653     else      return min;
654 }
655
656 static inline void write_back_non_zero_count(H264Context *h){
657     const int mb_xy= h->mb_xy;
658
659     h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
660     h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
661     h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
662     h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
663     h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
664     h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
665     h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
666
667     h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
668     h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
669     h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
670
671     h->non_zero_count[mb_xy][12]=h->non_zero_count_cache[1+8*5];
672     h->non_zero_count[mb_xy][11]=h->non_zero_count_cache[2+8*5];
673     h->non_zero_count[mb_xy][10]=h->non_zero_count_cache[2+8*4];
674 }
675
676 /**
677  * gets the predicted number of non-zero coefficients.
678  * @param n block index
679  */
680 static inline int pred_non_zero_count(H264Context *h, int n){
681     const int index8= scan8[n];
682     const int left= h->non_zero_count_cache[index8 - 1];
683     const int top = h->non_zero_count_cache[index8 - 8];
684     int i= left + top;
685
686     if(i<64) i= (i+1)>>1;
687
688     tprintf(h->s.avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31);
689
690     return i&31;
691 }
692
693 static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
694     const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
695     MpegEncContext *s = &h->s;
696
697     /* there is no consistent mapping of mvs to neighboring locations that will
698      * make mbaff happy, so we can't move all this logic to fill_caches */
699     if(FRAME_MBAFF){
700         const uint32_t *mb_types = s->current_picture_ptr->mb_type;
701         const int16_t *mv;
702         *(uint32_t*)h->mv_cache[list][scan8[0]-2] = 0;
703         *C = h->mv_cache[list][scan8[0]-2];
704
705         if(!MB_FIELD
706            && (s->mb_y&1) && i < scan8[0]+8 && topright_ref != PART_NOT_AVAILABLE){
707             int topright_xy = s->mb_x + (s->mb_y-1)*s->mb_stride + (i == scan8[0]+3);
708             if(IS_INTERLACED(mb_types[topright_xy])){
709 #define SET_DIAG_MV(MV_OP, REF_OP, X4, Y4)\
710                 const int x4 = X4, y4 = Y4;\
711                 const int mb_type = mb_types[(x4>>2)+(y4>>2)*s->mb_stride];\
712                 if(!USES_LIST(mb_type,list))\
713                     return LIST_NOT_USED;\
714                 mv = s->current_picture_ptr->motion_val[list][x4 + y4*h->b_stride];\
715                 h->mv_cache[list][scan8[0]-2][0] = mv[0];\
716                 h->mv_cache[list][scan8[0]-2][1] = mv[1] MV_OP;\
717                 return s->current_picture_ptr->ref_index[list][(x4>>1) + (y4>>1)*h->b8_stride] REF_OP;
718
719                 SET_DIAG_MV(*2, >>1, s->mb_x*4+(i&7)-4+part_width, s->mb_y*4-1);
720             }
721         }
722         if(topright_ref == PART_NOT_AVAILABLE
723            && ((s->mb_y&1) || i >= scan8[0]+8) && (i&7)==4
724            && h->ref_cache[list][scan8[0]-1] != PART_NOT_AVAILABLE){
725             if(!MB_FIELD
726                && IS_INTERLACED(mb_types[h->left_mb_xy[0]])){
727                 SET_DIAG_MV(*2, >>1, s->mb_x*4-1, (s->mb_y|1)*4+(s->mb_y&1)*2+(i>>4)-1);
728             }
729             if(MB_FIELD
730                && !IS_INTERLACED(mb_types[h->left_mb_xy[0]])
731                && i >= scan8[0]+8){
732                 // left shift will turn LIST_NOT_USED into PART_NOT_AVAILABLE, but that's OK.
733                 SET_DIAG_MV(/2, <<1, s->mb_x*4-1, (s->mb_y&~1)*4 - 1 + ((i-scan8[0])>>3)*2);
734             }
735         }
736 #undef SET_DIAG_MV
737     }
738
739     if(topright_ref != PART_NOT_AVAILABLE){
740         *C= h->mv_cache[list][ i - 8 + part_width ];
741         return topright_ref;
742     }else{
743         tprintf(s->avctx, "topright MV not available\n");
744
745         *C= h->mv_cache[list][ i - 8 - 1 ];
746         return h->ref_cache[list][ i - 8 - 1 ];
747     }
748 }
749
750 /**
751  * gets the predicted MV.
752  * @param n the block index
753  * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)
754  * @param mx the x component of the predicted motion vector
755  * @param my the y component of the predicted motion vector
756  */
757 static inline void pred_motion(H264Context * const h, int n, int part_width, int list, int ref, int * const mx, int * const my){
758     const int index8= scan8[n];
759     const int top_ref=      h->ref_cache[list][ index8 - 8 ];
760     const int left_ref=     h->ref_cache[list][ index8 - 1 ];
761     const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
762     const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
763     const int16_t * C;
764     int diagonal_ref, match_count;
765
766     assert(part_width==1 || part_width==2 || part_width==4);
767
768 /* mv_cache
769   B . . A T T T T
770   U . . L . . , .
771   U . . L . . . .
772   U . . L . . , .
773   . . . L . . . .
774 */
775
776     diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
777     match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
778     tprintf(h->s.avctx, "pred_motion match_count=%d\n", match_count);
779     if(match_count > 1){ //most common
780         *mx= mid_pred(A[0], B[0], C[0]);
781         *my= mid_pred(A[1], B[1], C[1]);
782     }else if(match_count==1){
783         if(left_ref==ref){
784             *mx= A[0];
785             *my= A[1];
786         }else if(top_ref==ref){
787             *mx= B[0];
788             *my= B[1];
789         }else{
790             *mx= C[0];
791             *my= C[1];
792         }
793     }else{
794         if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
795             *mx= A[0];
796             *my= A[1];
797         }else{
798             *mx= mid_pred(A[0], B[0], C[0]);
799             *my= mid_pred(A[1], B[1], C[1]);
800         }
801     }
802
803     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);
804 }
805
806 /**
807  * gets the directionally predicted 16x8 MV.
808  * @param n the block index
809  * @param mx the x component of the predicted motion vector
810  * @param my the y component of the predicted motion vector
811  */
812 static inline void pred_16x8_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
813     if(n==0){
814         const int top_ref=      h->ref_cache[list][ scan8[0] - 8 ];
815         const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
816
817         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);
818
819         if(top_ref == ref){
820             *mx= B[0];
821             *my= B[1];
822             return;
823         }
824     }else{
825         const int left_ref=     h->ref_cache[list][ scan8[8] - 1 ];
826         const int16_t * const A= h->mv_cache[list][ scan8[8] - 1 ];
827
828         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);
829
830         if(left_ref == ref){
831             *mx= A[0];
832             *my= A[1];
833             return;
834         }
835     }
836
837     //RARE
838     pred_motion(h, n, 4, list, ref, mx, my);
839 }
840
841 /**
842  * gets the directionally predicted 8x16 MV.
843  * @param n the block index
844  * @param mx the x component of the predicted motion vector
845  * @param my the y component of the predicted motion vector
846  */
847 static inline void pred_8x16_motion(H264Context * const h, int n, int list, int ref, int * const mx, int * const my){
848     if(n==0){
849         const int left_ref=      h->ref_cache[list][ scan8[0] - 1 ];
850         const int16_t * const A=  h->mv_cache[list][ scan8[0] - 1 ];
851
852         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);
853
854         if(left_ref == ref){
855             *mx= A[0];
856             *my= A[1];
857             return;
858         }
859     }else{
860         const int16_t * C;
861         int diagonal_ref;
862
863         diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
864
865         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);
866
867         if(diagonal_ref == ref){
868             *mx= C[0];
869             *my= C[1];
870             return;
871         }
872     }
873
874     //RARE
875     pred_motion(h, n, 2, list, ref, mx, my);
876 }
877
878 static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my){
879     const int top_ref = h->ref_cache[0][ scan8[0] - 8 ];
880     const int left_ref= h->ref_cache[0][ scan8[0] - 1 ];
881
882     tprintf(h->s.avctx, "pred_pskip: (%d) (%d) at %2d %2d\n", top_ref, left_ref, h->s.mb_x, h->s.mb_y);
883
884     if(top_ref == PART_NOT_AVAILABLE || left_ref == PART_NOT_AVAILABLE
885        || (top_ref == 0  && *(uint32_t*)h->mv_cache[0][ scan8[0] - 8 ] == 0)
886        || (left_ref == 0 && *(uint32_t*)h->mv_cache[0][ scan8[0] - 1 ] == 0)){
887
888         *mx = *my = 0;
889         return;
890     }
891
892     pred_motion(h, 0, 4, 0, 0, mx, my);
893
894     return;
895 }
896
897 static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
898     int poc0 = h->ref_list[0][i].poc;
899     int td = av_clip(poc1 - poc0, -128, 127);
900     if(td == 0 || h->ref_list[0][i].long_ref){
901         return 256;
902     }else{
903         int tb = av_clip(poc - poc0, -128, 127);
904         int tx = (16384 + (FFABS(td) >> 1)) / td;
905         return av_clip((tb*tx + 32) >> 6, -1024, 1023);
906     }
907 }
908
909 static inline void direct_dist_scale_factor(H264Context * const h){
910     MpegEncContext * const s = &h->s;
911     const int poc = h->s.current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
912     const int poc1 = h->ref_list[1][0].poc;
913     int i, field;
914     for(field=0; field<2; field++){
915         const int poc  = h->s.current_picture_ptr->field_poc[field];
916         const int poc1 = h->ref_list[1][0].field_poc[field];
917         for(i=0; i < 2*h->ref_count[0]; i++)
918             h->dist_scale_factor_field[field][i^field] = get_scale_factor(h, poc, poc1, i+16);
919     }
920
921     for(i=0; i<h->ref_count[0]; i++){
922         h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
923     }
924 }
925
926 static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
927     MpegEncContext * const s = &h->s;
928     Picture * const ref1 = &h->ref_list[1][0];
929     int j, old_ref, rfield;
930     int start= mbafi ? 16                      : 0;
931     int end  = mbafi ? 16+2*h->ref_count[list] : h->ref_count[list];
932     int interl= mbafi || s->picture_structure != PICT_FRAME;
933
934     /* bogus; fills in for missing frames */
935     memset(map[list], 0, sizeof(map[list]));
936
937     for(rfield=0; rfield<2; rfield++){
938         for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
939             int poc = ref1->ref_poc[colfield][list][old_ref];
940
941             if     (!interl)
942                 poc |= 3;
943             else if( interl && (poc&3) == 3) //FIXME store all MBAFF references so this isnt needed
944                 poc= (poc&~3) + rfield + 1;
945
946             for(j=start; j<end; j++){
947                 if(4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3) == poc){
948                     int cur_ref= mbafi ? (j-16)^field : j;
949                     map[list][2*old_ref + (rfield^field) + 16] = cur_ref;
950                     if(rfield == field)
951                         map[list][old_ref] = cur_ref;
952                     break;
953                 }
954             }
955         }
956     }
957 }
958
959 static inline void direct_ref_list_init(H264Context * const h){
960     MpegEncContext * const s = &h->s;
961     Picture * const ref1 = &h->ref_list[1][0];
962     Picture * const cur = s->current_picture_ptr;
963     int list, j, field;
964     int sidx= (s->picture_structure&1)^1;
965     int ref1sidx= (ref1->reference&1)^1;
966
967     for(list=0; list<2; list++){
968         cur->ref_count[sidx][list] = h->ref_count[list];
969         for(j=0; j<h->ref_count[list]; j++)
970             cur->ref_poc[sidx][list][j] = 4*h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference&3);
971     }
972
973     if(s->picture_structure == PICT_FRAME){
974         memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
975         memcpy(cur->ref_poc  [1], cur->ref_poc  [0], sizeof(cur->ref_poc  [0]));
976     }
977
978     cur->mbaff= FRAME_MBAFF;
979
980     if(cur->pict_type != FF_B_TYPE || h->direct_spatial_mv_pred)
981         return;
982
983     for(list=0; list<2; list++){
984         fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
985         for(field=0; field<2; field++)
986             fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
987     }
988 }
989
990 static inline void pred_direct_motion(H264Context * const h, int *mb_type){
991     MpegEncContext * const s = &h->s;
992     int b8_stride = h->b8_stride;
993     int b4_stride = h->b_stride;
994     int mb_xy = h->mb_xy;
995     int mb_type_col[2];
996     const int16_t (*l1mv0)[2], (*l1mv1)[2];
997     const int8_t *l1ref0, *l1ref1;
998     const int is_b8x8 = IS_8X8(*mb_type);
999     unsigned int sub_mb_type;
1000     int i8, i4;
1001
1002 #define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
1003
1004     if(IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])){ // AFL/AFR/FR/FL -> AFL/FL
1005         if(!IS_INTERLACED(*mb_type)){                    //     AFR/FR    -> AFL/FL
1006             int cur_poc = s->current_picture_ptr->poc;
1007             int *col_poc = h->ref_list[1]->field_poc;
1008             int col_parity = FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc);
1009             mb_xy= s->mb_x + ((s->mb_y&~1) + col_parity)*s->mb_stride;
1010             b8_stride = 0;
1011         }else if(!(s->picture_structure & h->ref_list[1][0].reference) && !h->ref_list[1][0].mbaff){// FL -> FL & differ parity
1012             int fieldoff= 2*(h->ref_list[1][0].reference)-3;
1013             mb_xy += s->mb_stride*fieldoff;
1014         }
1015         goto single_col;
1016     }else{                                               // AFL/AFR/FR/FL -> AFR/FR
1017         if(IS_INTERLACED(*mb_type)){                     // AFL       /FL -> AFR/FR
1018             mb_xy= s->mb_x + (s->mb_y&~1)*s->mb_stride;
1019             mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
1020             mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + s->mb_stride];
1021             b8_stride *= 3;
1022             b4_stride *= 6;
1023             //FIXME IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag
1024             if(    (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
1025                 && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
1026                 && !is_b8x8){
1027                 sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1028                 *mb_type   |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
1029             }else{
1030                 sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1031                 *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1032             }
1033         }else{                                           //     AFR/FR    -> AFR/FR
1034 single_col:
1035             mb_type_col[0] =
1036             mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
1037             if(IS_8X8(mb_type_col[0]) && !h->sps.direct_8x8_inference_flag){
1038                 /* FIXME save sub mb types from previous frames (or derive from MVs)
1039                 * so we know exactly what block size to use */
1040                 sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
1041                 *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1042             }else if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
1043                 sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1044                 *mb_type   |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
1045             }else{
1046                 sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
1047                 *mb_type   |= MB_TYPE_8x8|MB_TYPE_L0L1;
1048             }
1049         }
1050     }
1051
1052     l1mv0  = &h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
1053     l1mv1  = &h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
1054     l1ref0 = &h->ref_list[1][0].ref_index [0][h->mb2b8_xy[mb_xy]];
1055     l1ref1 = &h->ref_list[1][0].ref_index [1][h->mb2b8_xy[mb_xy]];
1056     if(!b8_stride){
1057         if(s->mb_y&1){
1058             l1ref0 += h->b8_stride;
1059             l1ref1 += h->b8_stride;
1060             l1mv0  +=  2*b4_stride;
1061             l1mv1  +=  2*b4_stride;
1062         }
1063     }
1064
1065     if(h->direct_spatial_mv_pred){
1066         int ref[2];
1067         int mv[2][2];
1068         int list;
1069
1070         /* FIXME interlacing + spatial direct uses wrong colocated block positions */
1071
1072         /* ref = min(neighbors) */
1073         for(list=0; list<2; list++){
1074             int refa = h->ref_cache[list][scan8[0] - 1];
1075             int refb = h->ref_cache[list][scan8[0] - 8];
1076             int refc = h->ref_cache[list][scan8[0] - 8 + 4];
1077             if(refc == PART_NOT_AVAILABLE)
1078                 refc = h->ref_cache[list][scan8[0] - 8 - 1];
1079             ref[list] = FFMIN3((unsigned)refa, (unsigned)refb, (unsigned)refc);
1080             if(ref[list] < 0)
1081                 ref[list] = -1;
1082         }
1083
1084         if(ref[0] < 0 && ref[1] < 0){
1085             ref[0] = ref[1] = 0;
1086             mv[0][0] = mv[0][1] =
1087             mv[1][0] = mv[1][1] = 0;
1088         }else{
1089             for(list=0; list<2; list++){
1090                 if(ref[list] >= 0)
1091                     pred_motion(h, 0, 4, list, ref[list], &mv[list][0], &mv[list][1]);
1092                 else
1093                     mv[list][0] = mv[list][1] = 0;
1094             }
1095         }
1096
1097         if(ref[1] < 0){
1098             if(!is_b8x8)
1099                 *mb_type &= ~MB_TYPE_L1;
1100             sub_mb_type &= ~MB_TYPE_L1;
1101         }else if(ref[0] < 0){
1102             if(!is_b8x8)
1103                 *mb_type &= ~MB_TYPE_L0;
1104             sub_mb_type &= ~MB_TYPE_L0;
1105         }
1106
1107         if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1108             for(i8=0; i8<4; i8++){
1109                 int x8 = i8&1;
1110                 int y8 = i8>>1;
1111                 int xy8 = x8+y8*b8_stride;
1112                 int xy4 = 3*x8+y8*b4_stride;
1113                 int a=0, b=0;
1114
1115                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1116                     continue;
1117                 h->sub_mb_type[i8] = sub_mb_type;
1118
1119                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1120                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1121                 if(!IS_INTRA(mb_type_col[y8])
1122                    && (   (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
1123                        || (l1ref0[xy8]  < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
1124                     if(ref[0] > 0)
1125                         a= pack16to32(mv[0][0],mv[0][1]);
1126                     if(ref[1] > 0)
1127                         b= pack16to32(mv[1][0],mv[1][1]);
1128                 }else{
1129                     a= pack16to32(mv[0][0],mv[0][1]);
1130                     b= pack16to32(mv[1][0],mv[1][1]);
1131                 }
1132                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
1133                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
1134             }
1135         }else if(IS_16X16(*mb_type)){
1136             int a=0, b=0;
1137
1138             fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
1139             fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
1140             if(!IS_INTRA(mb_type_col[0])
1141                && (   (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
1142                    || (l1ref0[0]  < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
1143                        && (h->x264_build>33 || !h->x264_build)))){
1144                 if(ref[0] > 0)
1145                     a= pack16to32(mv[0][0],mv[0][1]);
1146                 if(ref[1] > 0)
1147                     b= pack16to32(mv[1][0],mv[1][1]);
1148             }else{
1149                 a= pack16to32(mv[0][0],mv[0][1]);
1150                 b= pack16to32(mv[1][0],mv[1][1]);
1151             }
1152             fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
1153             fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
1154         }else{
1155             for(i8=0; i8<4; i8++){
1156                 const int x8 = i8&1;
1157                 const int y8 = i8>>1;
1158
1159                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1160                     continue;
1161                 h->sub_mb_type[i8] = sub_mb_type;
1162
1163                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mv[0][0],mv[0][1]), 4);
1164                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mv[1][0],mv[1][1]), 4);
1165                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
1166                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
1167
1168                 /* col_zero_flag */
1169                 if(!IS_INTRA(mb_type_col[0]) && (   l1ref0[x8 + y8*b8_stride] == 0
1170                                               || (l1ref0[x8 + y8*b8_stride] < 0 && l1ref1[x8 + y8*b8_stride] == 0
1171                                                   && (h->x264_build>33 || !h->x264_build)))){
1172                     const int16_t (*l1mv)[2]= l1ref0[x8 + y8*b8_stride] == 0 ? l1mv0 : l1mv1;
1173                     if(IS_SUB_8X8(sub_mb_type)){
1174                         const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1175                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1176                             if(ref[0] == 0)
1177                                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1178                             if(ref[1] == 0)
1179                                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1180                         }
1181                     }else
1182                     for(i4=0; i4<4; i4++){
1183                         const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1184                         if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
1185                             if(ref[0] == 0)
1186                                 *(uint32_t*)h->mv_cache[0][scan8[i8*4+i4]] = 0;
1187                             if(ref[1] == 0)
1188                                 *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] = 0;
1189                         }
1190                     }
1191                 }
1192             }
1193         }
1194     }else{ /* direct temporal mv pred */
1195         const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
1196         const int *dist_scale_factor = h->dist_scale_factor;
1197         int ref_offset= 0;
1198
1199         if(FRAME_MBAFF && IS_INTERLACED(*mb_type)){
1200             map_col_to_list0[0] = h->map_col_to_list0_field[s->mb_y&1][0];
1201             map_col_to_list0[1] = h->map_col_to_list0_field[s->mb_y&1][1];
1202             dist_scale_factor   =h->dist_scale_factor_field[s->mb_y&1];
1203         }
1204         if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0]))
1205             ref_offset += 16;
1206
1207         if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
1208             /* FIXME assumes direct_8x8_inference == 1 */
1209             int y_shift  = 2*!IS_INTERLACED(*mb_type);
1210
1211             for(i8=0; i8<4; i8++){
1212                 const int x8 = i8&1;
1213                 const int y8 = i8>>1;
1214                 int ref0, scale;
1215                 const int16_t (*l1mv)[2]= l1mv0;
1216
1217                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1218                     continue;
1219                 h->sub_mb_type[i8] = sub_mb_type;
1220
1221                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1222                 if(IS_INTRA(mb_type_col[y8])){
1223                     fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1224                     fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1225                     fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1226                     continue;
1227                 }
1228
1229                 ref0 = l1ref0[x8 + y8*b8_stride];
1230                 if(ref0 >= 0)
1231                     ref0 = map_col_to_list0[0][ref0 + ref_offset];
1232                 else{
1233                     ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1234                     l1mv= l1mv1;
1235                 }
1236                 scale = dist_scale_factor[ref0];
1237                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1238
1239                 {
1240                     const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
1241                     int my_col = (mv_col[1]<<y_shift)/2;
1242                     int mx = (scale * mv_col[0] + 128) >> 8;
1243                     int my = (scale * my_col + 128) >> 8;
1244                     fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1245                     fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
1246                 }
1247             }
1248             return;
1249         }
1250
1251         /* one-to-one mv scaling */
1252
1253         if(IS_16X16(*mb_type)){
1254             int ref, mv0, mv1;
1255
1256             fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
1257             if(IS_INTRA(mb_type_col[0])){
1258                 ref=mv0=mv1=0;
1259             }else{
1260                 const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
1261                                                 : map_col_to_list0[1][l1ref1[0] + ref_offset];
1262                 const int scale = dist_scale_factor[ref0];
1263                 const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
1264                 int mv_l0[2];
1265                 mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1266                 mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1267                 ref= ref0;
1268                 mv0= pack16to32(mv_l0[0],mv_l0[1]);
1269                 mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1270             }
1271             fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
1272             fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
1273             fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
1274         }else{
1275             for(i8=0; i8<4; i8++){
1276                 const int x8 = i8&1;
1277                 const int y8 = i8>>1;
1278                 int ref0, scale;
1279                 const int16_t (*l1mv)[2]= l1mv0;
1280
1281                 if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
1282                     continue;
1283                 h->sub_mb_type[i8] = sub_mb_type;
1284                 fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
1285                 if(IS_INTRA(mb_type_col[0])){
1286                     fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
1287                     fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
1288                     fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
1289                     continue;
1290                 }
1291
1292                 ref0 = l1ref0[x8 + y8*b8_stride] + ref_offset;
1293                 if(ref0 >= 0)
1294                     ref0 = map_col_to_list0[0][ref0];
1295                 else{
1296                     ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
1297                     l1mv= l1mv1;
1298                 }
1299                 scale = dist_scale_factor[ref0];
1300
1301                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
1302                 if(IS_SUB_8X8(sub_mb_type)){
1303                     const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
1304                     int mx = (scale * mv_col[0] + 128) >> 8;
1305                     int my = (scale * mv_col[1] + 128) >> 8;
1306                     fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
1307                     fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
1308                 }else
1309                 for(i4=0; i4<4; i4++){
1310                     const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
1311                     int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
1312                     mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
1313                     mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
1314                     *(uint32_t*)h->mv_cache[1][scan8[i8*4+i4]] =
1315                         pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
1316                 }
1317             }
1318         }
1319     }
1320 }
1321
1322 static inline void write_back_motion(H264Context *h, int mb_type){
1323     MpegEncContext * const s = &h->s;
1324     const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1325     const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1326     int list;
1327
1328     if(!USES_LIST(mb_type, 0))
1329         fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1330
1331     for(list=0; list<h->list_count; list++){
1332         int y;
1333         if(!USES_LIST(mb_type, list))
1334             continue;
1335
1336         for(y=0; y<4; y++){
1337             *(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];
1338             *(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];
1339         }
1340         if( h->pps.cabac ) {
1341             if(IS_SKIP(mb_type))
1342                 fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
1343             else
1344             for(y=0; y<4; y++){
1345                 *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
1346                 *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
1347             }
1348         }
1349
1350         {
1351             int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1352             ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1353             ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1354             ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1355             ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1356         }
1357     }
1358
1359     if(h->slice_type_nos == FF_B_TYPE && h->pps.cabac){
1360         if(IS_8X8(mb_type)){
1361             uint8_t *direct_table = &h->direct_table[b8_xy];
1362             direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1363             direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1364             direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1365         }
1366     }
1367 }
1368
1369 /**
1370  * Decodes a network abstraction layer unit.
1371  * @param consumed is the number of bytes used as input
1372  * @param length is the length of the array
1373  * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
1374  * @returns decoded bytes, might be src+1 if no escapes
1375  */
1376 static const uint8_t *decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
1377     int i, si, di;
1378     uint8_t *dst;
1379     int bufidx;
1380
1381 //    src[0]&0x80;                //forbidden bit
1382     h->nal_ref_idc= src[0]>>5;
1383     h->nal_unit_type= src[0]&0x1F;
1384
1385     src++; length--;
1386 #if 0
1387     for(i=0; i<length; i++)
1388         printf("%2X ", src[i]);
1389 #endif
1390     for(i=0; i+1<length; i+=2){
1391         if(src[i]) continue;
1392         if(i>0 && src[i-1]==0) i--;
1393         if(i+2<length && src[i+1]==0 && src[i+2]<=3){
1394             if(src[i+2]!=3){
1395                 /* startcode, so we must be past the end */
1396                 length=i;
1397             }
1398             break;
1399         }
1400     }
1401
1402     if(i>=length-1){ //no escaped 0
1403         *dst_length= length;
1404         *consumed= length+1; //+1 for the header
1405         return src;
1406     }
1407
1408     bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
1409     h->rbsp_buffer[bufidx]= av_fast_realloc(h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length);
1410     dst= h->rbsp_buffer[bufidx];
1411
1412     if (dst == NULL){
1413         return NULL;
1414     }
1415
1416 //printf("decoding esc\n");
1417     si=di=0;
1418     while(si<length){
1419         //remove escapes (very rare 1:2^22)
1420         if(si+2<length && src[si]==0 && src[si+1]==0 && src[si+2]<=3){
1421             if(src[si+2]==3){ //escape
1422                 dst[di++]= 0;
1423                 dst[di++]= 0;
1424                 si+=3;
1425                 continue;
1426             }else //next start code
1427                 break;
1428         }
1429
1430         dst[di++]= src[si++];
1431     }
1432
1433     *dst_length= di;
1434     *consumed= si + 1;//+1 for the header
1435 //FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
1436     return dst;
1437 }
1438
1439 /**
1440  * identifies the exact end of the bitstream
1441  * @return the length of the trailing, or 0 if damaged
1442  */
1443 static int decode_rbsp_trailing(H264Context *h, const uint8_t *src){
1444     int v= *src;
1445     int r;
1446
1447     tprintf(h->s.avctx, "rbsp trailing %X\n", v);
1448
1449     for(r=1; r<9; r++){
1450         if(v&1) return r;
1451         v>>=1;
1452     }
1453     return 0;
1454 }
1455
1456 /**
1457  * IDCT transforms the 16 dc values and dequantizes them.
1458  * @param qp quantization parameter
1459  */
1460 static void h264_luma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1461 #define stride 16
1462     int i;
1463     int temp[16]; //FIXME check if this is a good idea
1464     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1465     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1466
1467 //memset(block, 64, 2*256);
1468 //return;
1469     for(i=0; i<4; i++){
1470         const int offset= y_offset[i];
1471         const int z0= block[offset+stride*0] + block[offset+stride*4];
1472         const int z1= block[offset+stride*0] - block[offset+stride*4];
1473         const int z2= block[offset+stride*1] - block[offset+stride*5];
1474         const int z3= block[offset+stride*1] + block[offset+stride*5];
1475
1476         temp[4*i+0]= z0+z3;
1477         temp[4*i+1]= z1+z2;
1478         temp[4*i+2]= z1-z2;
1479         temp[4*i+3]= z0-z3;
1480     }
1481
1482     for(i=0; i<4; i++){
1483         const int offset= x_offset[i];
1484         const int z0= temp[4*0+i] + temp[4*2+i];
1485         const int z1= temp[4*0+i] - temp[4*2+i];
1486         const int z2= temp[4*1+i] - temp[4*3+i];
1487         const int z3= temp[4*1+i] + temp[4*3+i];
1488
1489         block[stride*0 +offset]= ((((z0 + z3)*qmul + 128 ) >> 8)); //FIXME think about merging this into decode_residual
1490         block[stride*2 +offset]= ((((z1 + z2)*qmul + 128 ) >> 8));
1491         block[stride*8 +offset]= ((((z1 - z2)*qmul + 128 ) >> 8));
1492         block[stride*10+offset]= ((((z0 - z3)*qmul + 128 ) >> 8));
1493     }
1494 }
1495
1496 #if 0
1497 /**
1498  * DCT transforms the 16 dc values.
1499  * @param qp quantization parameter ??? FIXME
1500  */
1501 static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
1502 //    const int qmul= dequant_coeff[qp][0];
1503     int i;
1504     int temp[16]; //FIXME check if this is a good idea
1505     static const int x_offset[4]={0, 1*stride, 4* stride,  5*stride};
1506     static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
1507
1508     for(i=0; i<4; i++){
1509         const int offset= y_offset[i];
1510         const int z0= block[offset+stride*0] + block[offset+stride*4];
1511         const int z1= block[offset+stride*0] - block[offset+stride*4];
1512         const int z2= block[offset+stride*1] - block[offset+stride*5];
1513         const int z3= block[offset+stride*1] + block[offset+stride*5];
1514
1515         temp[4*i+0]= z0+z3;
1516         temp[4*i+1]= z1+z2;
1517         temp[4*i+2]= z1-z2;
1518         temp[4*i+3]= z0-z3;
1519     }
1520
1521     for(i=0; i<4; i++){
1522         const int offset= x_offset[i];
1523         const int z0= temp[4*0+i] + temp[4*2+i];
1524         const int z1= temp[4*0+i] - temp[4*2+i];
1525         const int z2= temp[4*1+i] - temp[4*3+i];
1526         const int z3= temp[4*1+i] + temp[4*3+i];
1527
1528         block[stride*0 +offset]= (z0 + z3)>>1;
1529         block[stride*2 +offset]= (z1 + z2)>>1;
1530         block[stride*8 +offset]= (z1 - z2)>>1;
1531         block[stride*10+offset]= (z0 - z3)>>1;
1532     }
1533 }
1534 #endif
1535
1536 #undef xStride
1537 #undef stride
1538
1539 static void chroma_dc_dequant_idct_c(DCTELEM *block, int qp, int qmul){
1540     const int stride= 16*2;
1541     const int xStride= 16;
1542     int a,b,c,d,e;
1543
1544     a= block[stride*0 + xStride*0];
1545     b= block[stride*0 + xStride*1];
1546     c= block[stride*1 + xStride*0];
1547     d= block[stride*1 + xStride*1];
1548
1549     e= a-b;
1550     a= a+b;
1551     b= c-d;
1552     c= c+d;
1553
1554     block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
1555     block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
1556     block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
1557     block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
1558 }
1559
1560 #if 0
1561 static void chroma_dc_dct_c(DCTELEM *block){
1562     const int stride= 16*2;
1563     const int xStride= 16;
1564     int a,b,c,d,e;
1565
1566     a= block[stride*0 + xStride*0];
1567     b= block[stride*0 + xStride*1];
1568     c= block[stride*1 + xStride*0];
1569     d= block[stride*1 + xStride*1];
1570
1571     e= a-b;
1572     a= a+b;
1573     b= c-d;
1574     c= c+d;
1575
1576     block[stride*0 + xStride*0]= (a+c);
1577     block[stride*0 + xStride*1]= (e+b);
1578     block[stride*1 + xStride*0]= (a-c);
1579     block[stride*1 + xStride*1]= (e-b);
1580 }
1581 #endif
1582
1583 /**
1584  * gets the chroma qp.
1585  */
1586 static inline int get_chroma_qp(H264Context *h, int t, int qscale){
1587     return h->pps.chroma_qp_table[t][qscale];
1588 }
1589
1590 static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
1591                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1592                            int src_x_offset, int src_y_offset,
1593                            qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
1594     MpegEncContext * const s = &h->s;
1595     const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
1596     int my=       h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
1597     const int luma_xy= (mx&3) + ((my&3)<<2);
1598     uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
1599     uint8_t * src_cb, * src_cr;
1600     int extra_width= h->emu_edge_width;
1601     int extra_height= h->emu_edge_height;
1602     int emu=0;
1603     const int full_mx= mx>>2;
1604     const int full_my= my>>2;
1605     const int pic_width  = 16*s->mb_width;
1606     const int pic_height = 16*s->mb_height >> MB_FIELD;
1607
1608     if(mx&7) extra_width -= 3;
1609     if(my&7) extra_height -= 3;
1610
1611     if(   full_mx < 0-extra_width
1612        || full_my < 0-extra_height
1613        || full_mx + 16/*FIXME*/ > pic_width + extra_width
1614        || full_my + 16/*FIXME*/ > pic_height + extra_height){
1615         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);
1616             src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
1617         emu=1;
1618     }
1619
1620     qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
1621     if(!square){
1622         qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
1623     }
1624
1625     if(ENABLE_GRAY && s->flags&CODEC_FLAG_GRAY) return;
1626
1627     if(MB_FIELD){
1628         // chroma offset when predicting from a field of opposite parity
1629         my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
1630         emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
1631     }
1632     src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1633     src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
1634
1635     if(emu){
1636         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);
1637             src_cb= s->edge_emu_buffer;
1638     }
1639     chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1640
1641     if(emu){
1642         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);
1643             src_cr= s->edge_emu_buffer;
1644     }
1645     chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
1646 }
1647
1648 static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
1649                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1650                            int x_offset, int y_offset,
1651                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1652                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1653                            int list0, int list1){
1654     MpegEncContext * const s = &h->s;
1655     qpel_mc_func *qpix_op=  qpix_put;
1656     h264_chroma_mc_func chroma_op= chroma_put;
1657
1658     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1659     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1660     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1661     x_offset += 8*s->mb_x;
1662     y_offset += 8*(s->mb_y >> MB_FIELD);
1663
1664     if(list0){
1665         Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
1666         mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
1667                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
1668                            qpix_op, chroma_op);
1669
1670         qpix_op=  qpix_avg;
1671         chroma_op= chroma_avg;
1672     }
1673
1674     if(list1){
1675         Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
1676         mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
1677                            dest_y, dest_cb, dest_cr, x_offset, y_offset,
1678                            qpix_op, chroma_op);
1679     }
1680 }
1681
1682 static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
1683                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1684                            int x_offset, int y_offset,
1685                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1686                            h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
1687                            h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
1688                            int list0, int list1){
1689     MpegEncContext * const s = &h->s;
1690
1691     dest_y  += 2*x_offset + 2*y_offset*h->  mb_linesize;
1692     dest_cb +=   x_offset +   y_offset*h->mb_uvlinesize;
1693     dest_cr +=   x_offset +   y_offset*h->mb_uvlinesize;
1694     x_offset += 8*s->mb_x;
1695     y_offset += 8*(s->mb_y >> MB_FIELD);
1696
1697     if(list0 && list1){
1698         /* don't optimize for luma-only case, since B-frames usually
1699          * use implicit weights => chroma too. */
1700         uint8_t *tmp_cb = s->obmc_scratchpad;
1701         uint8_t *tmp_cr = s->obmc_scratchpad + 8;
1702         uint8_t *tmp_y  = s->obmc_scratchpad + 8*h->mb_uvlinesize;
1703         int refn0 = h->ref_cache[0][ scan8[n] ];
1704         int refn1 = h->ref_cache[1][ scan8[n] ];
1705
1706         mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
1707                     dest_y, dest_cb, dest_cr,
1708                     x_offset, y_offset, qpix_put, chroma_put);
1709         mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
1710                     tmp_y, tmp_cb, tmp_cr,
1711                     x_offset, y_offset, qpix_put, chroma_put);
1712
1713         if(h->use_weight == 2){
1714             int weight0 = h->implicit_weight[refn0][refn1];
1715             int weight1 = 64 - weight0;
1716             luma_weight_avg(  dest_y,  tmp_y,  h->  mb_linesize, 5, weight0, weight1, 0);
1717             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
1718             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
1719         }else{
1720             luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
1721                             h->luma_weight[0][refn0], h->luma_weight[1][refn1],
1722                             h->luma_offset[0][refn0] + h->luma_offset[1][refn1]);
1723             chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1724                             h->chroma_weight[0][refn0][0], h->chroma_weight[1][refn1][0],
1725                             h->chroma_offset[0][refn0][0] + h->chroma_offset[1][refn1][0]);
1726             chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1727                             h->chroma_weight[0][refn0][1], h->chroma_weight[1][refn1][1],
1728                             h->chroma_offset[0][refn0][1] + h->chroma_offset[1][refn1][1]);
1729         }
1730     }else{
1731         int list = list1 ? 1 : 0;
1732         int refn = h->ref_cache[list][ scan8[n] ];
1733         Picture *ref= &h->ref_list[list][refn];
1734         mc_dir_part(h, ref, n, square, chroma_height, delta, list,
1735                     dest_y, dest_cb, dest_cr, x_offset, y_offset,
1736                     qpix_put, chroma_put);
1737
1738         luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
1739                        h->luma_weight[list][refn], h->luma_offset[list][refn]);
1740         if(h->use_weight_chroma){
1741             chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1742                              h->chroma_weight[list][refn][0], h->chroma_offset[list][refn][0]);
1743             chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
1744                              h->chroma_weight[list][refn][1], h->chroma_offset[list][refn][1]);
1745         }
1746     }
1747 }
1748
1749 static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
1750                            uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1751                            int x_offset, int y_offset,
1752                            qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
1753                            qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
1754                            h264_weight_func *weight_op, h264_biweight_func *weight_avg,
1755                            int list0, int list1){
1756     if((h->use_weight==2 && list0 && list1
1757         && (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ] != 32))
1758        || h->use_weight==1)
1759         mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1760                          x_offset, y_offset, qpix_put, chroma_put,
1761                          weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
1762     else
1763         mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
1764                     x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
1765 }
1766
1767 static inline void prefetch_motion(H264Context *h, int list){
1768     /* fetch pixels for estimated mv 4 macroblocks ahead
1769      * optimized for 64byte cache lines */
1770     MpegEncContext * const s = &h->s;
1771     const int refn = h->ref_cache[list][scan8[0]];
1772     if(refn >= 0){
1773         const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
1774         const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
1775         uint8_t **src= h->ref_list[list][refn].data;
1776         int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
1777         s->dsp.prefetch(src[0]+off, s->linesize, 4);
1778         off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
1779         s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
1780     }
1781 }
1782
1783 static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
1784                       qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
1785                       qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
1786                       h264_weight_func *weight_op, h264_biweight_func *weight_avg){
1787     MpegEncContext * const s = &h->s;
1788     const int mb_xy= h->mb_xy;
1789     const int mb_type= s->current_picture.mb_type[mb_xy];
1790
1791     assert(IS_INTER(mb_type));
1792
1793     prefetch_motion(h, 0);
1794
1795     if(IS_16X16(mb_type)){
1796         mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
1797                 qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
1798                 &weight_op[0], &weight_avg[0],
1799                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1800     }else if(IS_16X8(mb_type)){
1801         mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
1802                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1803                 &weight_op[1], &weight_avg[1],
1804                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1805         mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
1806                 qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
1807                 &weight_op[1], &weight_avg[1],
1808                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1809     }else if(IS_8X16(mb_type)){
1810         mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
1811                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1812                 &weight_op[2], &weight_avg[2],
1813                 IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
1814         mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
1815                 qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1816                 &weight_op[2], &weight_avg[2],
1817                 IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
1818     }else{
1819         int i;
1820
1821         assert(IS_8X8(mb_type));
1822
1823         for(i=0; i<4; i++){
1824             const int sub_mb_type= h->sub_mb_type[i];
1825             const int n= 4*i;
1826             int x_offset= (i&1)<<2;
1827             int y_offset= (i&2)<<1;
1828
1829             if(IS_SUB_8X8(sub_mb_type)){
1830                 mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1831                     qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
1832                     &weight_op[3], &weight_avg[3],
1833                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1834             }else if(IS_SUB_8X4(sub_mb_type)){
1835                 mc_part(h, n  , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1836                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1837                     &weight_op[4], &weight_avg[4],
1838                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1839                 mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
1840                     qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
1841                     &weight_op[4], &weight_avg[4],
1842                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1843             }else if(IS_SUB_4X8(sub_mb_type)){
1844                 mc_part(h, n  , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
1845                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1846                     &weight_op[5], &weight_avg[5],
1847                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1848                 mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
1849                     qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1850                     &weight_op[5], &weight_avg[5],
1851                     IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1852             }else{
1853                 int j;
1854                 assert(IS_SUB_4X4(sub_mb_type));
1855                 for(j=0; j<4; j++){
1856                     int sub_x_offset= x_offset + 2*(j&1);
1857                     int sub_y_offset= y_offset +   (j&2);
1858                     mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
1859                         qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
1860                         &weight_op[6], &weight_avg[6],
1861                         IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
1862                 }
1863             }
1864         }
1865     }
1866
1867     prefetch_motion(h, 1);
1868 }
1869
1870 static av_cold void decode_init_vlc(void){
1871     static int done = 0;
1872
1873     if (!done) {
1874         int i;
1875         int offset;
1876         done = 1;
1877
1878         chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table;
1879         chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size;
1880         init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5,
1881                  &chroma_dc_coeff_token_len [0], 1, 1,
1882                  &chroma_dc_coeff_token_bits[0], 1, 1,
1883                  INIT_VLC_USE_NEW_STATIC);
1884
1885         offset = 0;
1886         for(i=0; i<4; i++){
1887             coeff_token_vlc[i].table = coeff_token_vlc_tables+offset;
1888             coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i];
1889             init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17,
1890                      &coeff_token_len [i][0], 1, 1,
1891                      &coeff_token_bits[i][0], 1, 1,
1892                      INIT_VLC_USE_NEW_STATIC);
1893             offset += coeff_token_vlc_tables_size[i];
1894         }
1895         /*
1896          * This is a one time safety check to make sure that
1897          * the packed static coeff_token_vlc table sizes
1898          * were initialized correctly.
1899          */
1900         assert(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables));
1901
1902         for(i=0; i<3; i++){
1903             chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i];
1904             chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size;
1905             init_vlc(&chroma_dc_total_zeros_vlc[i],
1906                      CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4,
1907                      &chroma_dc_total_zeros_len [i][0], 1, 1,
1908                      &chroma_dc_total_zeros_bits[i][0], 1, 1,
1909                      INIT_VLC_USE_NEW_STATIC);
1910         }
1911         for(i=0; i<15; i++){
1912             total_zeros_vlc[i].table = total_zeros_vlc_tables[i];
1913             total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size;
1914             init_vlc(&total_zeros_vlc[i],
1915                      TOTAL_ZEROS_VLC_BITS, 16,
1916                      &total_zeros_len [i][0], 1, 1,
1917                      &total_zeros_bits[i][0], 1, 1,
1918                      INIT_VLC_USE_NEW_STATIC);
1919         }
1920
1921         for(i=0; i<6; i++){
1922             run_vlc[i].table = run_vlc_tables[i];
1923             run_vlc[i].table_allocated = run_vlc_tables_size;
1924             init_vlc(&run_vlc[i],
1925                      RUN_VLC_BITS, 7,
1926                      &run_len [i][0], 1, 1,
1927                      &run_bits[i][0], 1, 1,
1928                      INIT_VLC_USE_NEW_STATIC);
1929         }
1930         run7_vlc.table = run7_vlc_table,
1931         run7_vlc.table_allocated = run7_vlc_table_size;
1932         init_vlc(&run7_vlc, RUN7_VLC_BITS, 16,
1933                  &run_len [6][0], 1, 1,
1934                  &run_bits[6][0], 1, 1,
1935                  INIT_VLC_USE_NEW_STATIC);
1936     }
1937 }
1938
1939 static void free_tables(H264Context *h){
1940     int i;
1941     H264Context *hx;
1942     av_freep(&h->intra4x4_pred_mode);
1943     av_freep(&h->chroma_pred_mode_table);
1944     av_freep(&h->cbp_table);
1945     av_freep(&h->mvd_table[0]);
1946     av_freep(&h->mvd_table[1]);
1947     av_freep(&h->direct_table);
1948     av_freep(&h->non_zero_count);
1949     av_freep(&h->slice_table_base);
1950     h->slice_table= NULL;
1951
1952     av_freep(&h->mb2b_xy);
1953     av_freep(&h->mb2b8_xy);
1954
1955     for(i = 0; i < h->s.avctx->thread_count; i++) {
1956         hx = h->thread_context[i];
1957         if(!hx) continue;
1958         av_freep(&hx->top_borders[1]);
1959         av_freep(&hx->top_borders[0]);
1960         av_freep(&hx->s.obmc_scratchpad);
1961     }
1962 }
1963
1964 static void init_dequant8_coeff_table(H264Context *h){
1965     int i,q,x;
1966     const int transpose = (h->s.dsp.h264_idct8_add != ff_h264_idct8_add_c); //FIXME ugly
1967     h->dequant8_coeff[0] = h->dequant8_buffer[0];
1968     h->dequant8_coeff[1] = h->dequant8_buffer[1];
1969
1970     for(i=0; i<2; i++ ){
1971         if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
1972             h->dequant8_coeff[1] = h->dequant8_buffer[0];
1973             break;
1974         }
1975
1976         for(q=0; q<52; q++){
1977             int shift = div6[q];
1978             int idx = rem6[q];
1979             for(x=0; x<64; x++)
1980                 h->dequant8_coeff[i][q][transpose ? (x>>3)|((x&7)<<3) : x] =
1981                     ((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
1982                     h->pps.scaling_matrix8[i][x]) << shift;
1983         }
1984     }
1985 }
1986
1987 static void init_dequant4_coeff_table(H264Context *h){
1988     int i,j,q,x;
1989     const int transpose = (h->s.dsp.h264_idct_add != ff_h264_idct_add_c); //FIXME ugly
1990     for(i=0; i<6; i++ ){
1991         h->dequant4_coeff[i] = h->dequant4_buffer[i];
1992         for(j=0; j<i; j++){
1993             if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
1994                 h->dequant4_coeff[i] = h->dequant4_buffer[j];
1995                 break;
1996             }
1997         }
1998         if(j<i)
1999             continue;
2000
2001         for(q=0; q<52; q++){
2002             int shift = div6[q] + 2;
2003             int idx = rem6[q];
2004             for(x=0; x<16; x++)
2005                 h->dequant4_coeff[i][q][transpose ? (x>>2)|((x<<2)&0xF) : x] =
2006                     ((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
2007                     h->pps.scaling_matrix4[i][x]) << shift;
2008         }
2009     }
2010 }
2011
2012 static void init_dequant_tables(H264Context *h){
2013     int i,x;
2014     init_dequant4_coeff_table(h);
2015     if(h->pps.transform_8x8_mode)
2016         init_dequant8_coeff_table(h);
2017     if(h->sps.transform_bypass){
2018         for(i=0; i<6; i++)
2019             for(x=0; x<16; x++)
2020                 h->dequant4_coeff[i][0][x] = 1<<6;
2021         if(h->pps.transform_8x8_mode)
2022             for(i=0; i<2; i++)
2023                 for(x=0; x<64; x++)
2024                     h->dequant8_coeff[i][0][x] = 1<<6;
2025     }
2026 }
2027
2028
2029 /**
2030  * allocates tables.
2031  * needs width/height
2032  */
2033 static int alloc_tables(H264Context *h){
2034     MpegEncContext * const s = &h->s;
2035     const int big_mb_num= s->mb_stride * (s->mb_height+1);
2036     int x,y;
2037
2038     CHECKED_ALLOCZ(h->intra4x4_pred_mode, big_mb_num * 8  * sizeof(uint8_t))
2039
2040     CHECKED_ALLOCZ(h->non_zero_count    , big_mb_num * 16 * sizeof(uint8_t))
2041     CHECKED_ALLOCZ(h->slice_table_base  , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base))
2042     CHECKED_ALLOCZ(h->cbp_table, big_mb_num * sizeof(uint16_t))
2043
2044     CHECKED_ALLOCZ(h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t))
2045     CHECKED_ALLOCZ(h->mvd_table[0], 32*big_mb_num * sizeof(uint16_t));
2046     CHECKED_ALLOCZ(h->mvd_table[1], 32*big_mb_num * sizeof(uint16_t));
2047     CHECKED_ALLOCZ(h->direct_table, 32*big_mb_num * sizeof(uint8_t));
2048
2049     memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride)  * sizeof(*h->slice_table_base));
2050     h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
2051
2052     CHECKED_ALLOCZ(h->mb2b_xy  , big_mb_num * sizeof(uint32_t));
2053     CHECKED_ALLOCZ(h->mb2b8_xy , big_mb_num * sizeof(uint32_t));
2054     for(y=0; y<s->mb_height; y++){
2055         for(x=0; x<s->mb_width; x++){
2056             const int mb_xy= x + y*s->mb_stride;
2057             const int b_xy = 4*x + 4*y*h->b_stride;
2058             const int b8_xy= 2*x + 2*y*h->b8_stride;
2059
2060             h->mb2b_xy [mb_xy]= b_xy;
2061             h->mb2b8_xy[mb_xy]= b8_xy;
2062         }
2063     }
2064
2065     s->obmc_scratchpad = NULL;
2066
2067     if(!h->dequant4_coeff[0])
2068         init_dequant_tables(h);
2069
2070     return 0;
2071 fail:
2072     free_tables(h);
2073     return -1;
2074 }
2075
2076 /**
2077  * Mimic alloc_tables(), but for every context thread.
2078  */
2079 static void clone_tables(H264Context *dst, H264Context *src){
2080     dst->intra4x4_pred_mode       = src->intra4x4_pred_mode;
2081     dst->non_zero_count           = src->non_zero_count;
2082     dst->slice_table              = src->slice_table;
2083     dst->cbp_table                = src->cbp_table;
2084     dst->mb2b_xy                  = src->mb2b_xy;
2085     dst->mb2b8_xy                 = src->mb2b8_xy;
2086     dst->chroma_pred_mode_table   = src->chroma_pred_mode_table;
2087     dst->mvd_table[0]             = src->mvd_table[0];
2088     dst->mvd_table[1]             = src->mvd_table[1];
2089     dst->direct_table             = src->direct_table;
2090
2091     dst->s.obmc_scratchpad = NULL;
2092     ff_h264_pred_init(&dst->hpc, src->s.codec_id);
2093 }
2094
2095 /**
2096  * Init context
2097  * Allocate buffers which are not shared amongst multiple threads.
2098  */
2099 static int context_init(H264Context *h){
2100     CHECKED_ALLOCZ(h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2101     CHECKED_ALLOCZ(h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t))
2102
2103     return 0;
2104 fail:
2105     return -1; // free_tables will clean up for us
2106 }
2107
2108 static av_cold void common_init(H264Context *h){
2109     MpegEncContext * const s = &h->s;
2110
2111     s->width = s->avctx->width;
2112     s->height = s->avctx->height;
2113     s->codec_id= s->avctx->codec->id;
2114
2115     ff_h264_pred_init(&h->hpc, s->codec_id);
2116
2117     h->dequant_coeff_pps= -1;
2118     s->unrestricted_mv=1;
2119     s->decode=1; //FIXME
2120
2121     memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
2122     memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
2123 }
2124
2125 static av_cold int decode_init(AVCodecContext *avctx){
2126     H264Context *h= avctx->priv_data;
2127     MpegEncContext * const s = &h->s;
2128
2129     MPV_decode_defaults(s);
2130
2131     s->avctx = avctx;
2132     common_init(h);
2133
2134     s->out_format = FMT_H264;
2135     s->workaround_bugs= avctx->workaround_bugs;
2136
2137     // set defaults
2138 //    s->decode_mb= ff_h263_decode_mb;
2139     s->quarter_sample = 1;
2140     s->low_delay= 1;
2141
2142     if(avctx->codec_id == CODEC_ID_SVQ3)
2143         avctx->pix_fmt= PIX_FMT_YUVJ420P;
2144     else
2145         avctx->pix_fmt= PIX_FMT_YUV420P;
2146
2147     decode_init_vlc();
2148
2149     if(avctx->extradata_size > 0 && avctx->extradata &&
2150        *(char *)avctx->extradata == 1){
2151         h->is_avc = 1;
2152         h->got_avcC = 0;
2153     } else {
2154         h->is_avc = 0;
2155     }
2156
2157     h->thread_context[0] = h;
2158     h->outputed_poc = INT_MIN;
2159     h->prev_poc_msb= 1<<16;
2160     return 0;
2161 }
2162
2163 static int frame_start(H264Context *h){
2164     MpegEncContext * const s = &h->s;
2165     int i;
2166
2167     if(MPV_frame_start(s, s->avctx) < 0)
2168         return -1;
2169     ff_er_frame_start(s);
2170     /*
2171      * MPV_frame_start uses pict_type to derive key_frame.
2172      * This is incorrect for H.264; IDR markings must be used.
2173      * Zero here; IDR markings per slice in frame or fields are ORed in later.
2174      * See decode_nal_units().
2175      */
2176     s->current_picture_ptr->key_frame= 0;
2177
2178     assert(s->linesize && s->uvlinesize);
2179
2180     for(i=0; i<16; i++){
2181         h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
2182         h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
2183     }
2184     for(i=0; i<4; i++){
2185         h->block_offset[16+i]=
2186         h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2187         h->block_offset[24+16+i]=
2188         h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
2189     }
2190
2191     /* can't be in alloc_tables because linesize isn't known there.
2192      * FIXME: redo bipred weight to not require extra buffer? */
2193     for(i = 0; i < s->avctx->thread_count; i++)
2194         if(!h->thread_context[i]->s.obmc_scratchpad)
2195             h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
2196
2197     /* some macroblocks will be accessed before they're available */
2198     if(FRAME_MBAFF || s->avctx->thread_count > 1)
2199         memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
2200
2201 //    s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
2202
2203     // We mark the current picture as non-reference after allocating it, so
2204     // that if we break out due to an error it can be released automatically
2205     // in the next MPV_frame_start().
2206     // SVQ3 as well as most other codecs have only last/next/current and thus
2207     // get released even with set reference, besides SVQ3 and others do not
2208     // mark frames as reference later "naturally".
2209     if(s->codec_id != CODEC_ID_SVQ3)
2210         s->current_picture_ptr->reference= 0;
2211
2212     s->current_picture_ptr->field_poc[0]=
2213     s->current_picture_ptr->field_poc[1]= INT_MAX;
2214     assert(s->current_picture_ptr->long_ref==0);
2215
2216     return 0;
2217 }
2218
2219 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){
2220     MpegEncContext * const s = &h->s;
2221     int i;
2222     int step    = 1;
2223     int offset  = 1;
2224     int uvoffset= 1;
2225     int top_idx = 1;
2226     int skiplast= 0;
2227
2228     src_y  -=   linesize;
2229     src_cb -= uvlinesize;
2230     src_cr -= uvlinesize;
2231
2232     if(!simple && FRAME_MBAFF){
2233         if(s->mb_y&1){
2234             offset  = MB_MBAFF ? 1 : 17;
2235             uvoffset= MB_MBAFF ? 1 : 9;
2236             if(!MB_MBAFF){
2237                 *(uint64_t*)(h->top_borders[0][s->mb_x]+ 0)= *(uint64_t*)(src_y +  15*linesize);
2238                 *(uint64_t*)(h->top_borders[0][s->mb_x]+ 8)= *(uint64_t*)(src_y +8+15*linesize);
2239                 if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2240                     *(uint64_t*)(h->top_borders[0][s->mb_x]+16)= *(uint64_t*)(src_cb+7*uvlinesize);
2241                     *(uint64_t*)(h->top_borders[0][s->mb_x]+24)= *(uint64_t*)(src_cr+7*uvlinesize);
2242                 }
2243             }
2244         }else{
2245             if(!MB_MBAFF){
2246                 h->left_border[0]= h->top_borders[0][s->mb_x][15];
2247                 if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2248                     h->left_border[34   ]= h->top_borders[0][s->mb_x][16+7  ];
2249                     h->left_border[34+18]= h->top_borders[0][s->mb_x][16+8+7];
2250                 }
2251                 skiplast= 1;
2252             }
2253             offset  =
2254             uvoffset=
2255             top_idx = MB_MBAFF ? 0 : 1;
2256         }
2257         step= MB_MBAFF ? 2 : 1;
2258     }
2259
2260     // There are two lines saved, the line above the the top macroblock of a pair,
2261     // and the line above the bottom macroblock
2262     h->left_border[offset]= h->top_borders[top_idx][s->mb_x][15];
2263     for(i=1; i<17 - skiplast; i++){
2264         h->left_border[offset+i*step]= src_y[15+i*  linesize];
2265     }
2266
2267     *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0)= *(uint64_t*)(src_y +  16*linesize);
2268     *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8)= *(uint64_t*)(src_y +8+16*linesize);
2269
2270     if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2271         h->left_border[uvoffset+34   ]= h->top_borders[top_idx][s->mb_x][16+7];
2272         h->left_border[uvoffset+34+18]= h->top_borders[top_idx][s->mb_x][24+7];
2273         for(i=1; i<9 - skiplast; i++){
2274             h->left_border[uvoffset+34   +i*step]= src_cb[7+i*uvlinesize];
2275             h->left_border[uvoffset+34+18+i*step]= src_cr[7+i*uvlinesize];
2276         }
2277         *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16)= *(uint64_t*)(src_cb+8*uvlinesize);
2278         *(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24)= *(uint64_t*)(src_cr+8*uvlinesize);
2279     }
2280 }
2281
2282 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){
2283     MpegEncContext * const s = &h->s;
2284     int temp8, i;
2285     uint64_t temp64;
2286     int deblock_left;
2287     int deblock_top;
2288     int mb_xy;
2289     int step    = 1;
2290     int offset  = 1;
2291     int uvoffset= 1;
2292     int top_idx = 1;
2293
2294     if(!simple && FRAME_MBAFF){
2295         if(s->mb_y&1){
2296             offset  = MB_MBAFF ? 1 : 17;
2297             uvoffset= MB_MBAFF ? 1 : 9;
2298         }else{
2299             offset  =
2300             uvoffset=
2301             top_idx = MB_MBAFF ? 0 : 1;
2302         }
2303         step= MB_MBAFF ? 2 : 1;
2304     }
2305
2306     if(h->deblocking_filter == 2) {
2307         mb_xy = h->mb_xy;
2308         deblock_left = h->slice_table[mb_xy] == h->slice_table[mb_xy - 1];
2309         deblock_top  = h->slice_table[mb_xy] == h->slice_table[h->top_mb_xy];
2310     } else {
2311         deblock_left = (s->mb_x > 0);
2312         deblock_top =  (s->mb_y > !!MB_FIELD);
2313     }
2314
2315     src_y  -=   linesize + 1;
2316     src_cb -= uvlinesize + 1;
2317     src_cr -= uvlinesize + 1;
2318
2319 #define XCHG(a,b,t,xchg)\
2320 t= a;\
2321 if(xchg)\
2322     a= b;\
2323 b= t;
2324
2325     if(deblock_left){
2326         for(i = !deblock_top; i<16; i++){
2327             XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, xchg);
2328         }
2329         XCHG(h->left_border[offset+i*step], src_y [i*  linesize], temp8, 1);
2330     }
2331
2332     if(deblock_top){
2333         XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+0), *(uint64_t*)(src_y +1), temp64, xchg);
2334         XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+8), *(uint64_t*)(src_y +9), temp64, 1);
2335         if(s->mb_x+1 < s->mb_width){
2336             XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x+1]), *(uint64_t*)(src_y +17), temp64, 1);
2337         }
2338     }
2339
2340     if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2341         if(deblock_left){
2342             for(i = !deblock_top; i<8; i++){
2343                 XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, xchg);
2344                 XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, xchg);
2345             }
2346             XCHG(h->left_border[uvoffset+34   +i*step], src_cb[i*uvlinesize], temp8, 1);
2347             XCHG(h->left_border[uvoffset+34+18+i*step], src_cr[i*uvlinesize], temp8, 1);
2348         }
2349         if(deblock_top){
2350             XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+16), *(uint64_t*)(src_cb+1), temp64, 1);
2351             XCHG(*(uint64_t*)(h->top_borders[top_idx][s->mb_x]+24), *(uint64_t*)(src_cr+1), temp64, 1);
2352         }
2353     }
2354 }
2355
2356 static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){
2357     MpegEncContext * const s = &h->s;
2358     const int mb_x= s->mb_x;
2359     const int mb_y= s->mb_y;
2360     const int mb_xy= h->mb_xy;
2361     const int mb_type= s->current_picture.mb_type[mb_xy];
2362     uint8_t  *dest_y, *dest_cb, *dest_cr;
2363     int linesize, uvlinesize /*dct_offset*/;
2364     int i;
2365     int *block_offset = &h->block_offset[0];
2366     const int transform_bypass = !simple && (s->qscale == 0 && h->sps.transform_bypass);
2367     const int is_h264 = simple || s->codec_id == CODEC_ID_H264;
2368     void (*idct_add)(uint8_t *dst, DCTELEM *block, int stride);
2369     void (*idct_dc_add)(uint8_t *dst, DCTELEM *block, int stride);
2370
2371     dest_y  = s->current_picture.data[0] + (mb_x + mb_y * s->linesize  ) * 16;
2372     dest_cb = s->current_picture.data[1] + (mb_x + mb_y * s->uvlinesize) * 8;
2373     dest_cr = s->current_picture.data[2] + (mb_x + mb_y * s->uvlinesize) * 8;
2374
2375     s->dsp.prefetch(dest_y + (s->mb_x&3)*4*s->linesize + 64, s->linesize, 4);
2376     s->dsp.prefetch(dest_cb + (s->mb_x&7)*s->uvlinesize + 64, dest_cr - dest_cb, 2);
2377
2378     if (!simple && MB_FIELD) {
2379         linesize   = h->mb_linesize   = s->linesize * 2;
2380         uvlinesize = h->mb_uvlinesize = s->uvlinesize * 2;
2381         block_offset = &h->block_offset[24];
2382         if(mb_y&1){ //FIXME move out of this function?
2383             dest_y -= s->linesize*15;
2384             dest_cb-= s->uvlinesize*7;
2385             dest_cr-= s->uvlinesize*7;
2386         }
2387         if(FRAME_MBAFF) {
2388             int list;
2389             for(list=0; list<h->list_count; list++){
2390                 if(!USES_LIST(mb_type, list))
2391                     continue;
2392                 if(IS_16X16(mb_type)){
2393                     int8_t *ref = &h->ref_cache[list][scan8[0]];
2394                     fill_rectangle(ref, 4, 4, 8, (16+*ref)^(s->mb_y&1), 1);
2395                 }else{
2396                     for(i=0; i<16; i+=4){
2397                         int ref = h->ref_cache[list][scan8[i]];
2398                         if(ref >= 0)
2399                             fill_rectangle(&h->ref_cache[list][scan8[i]], 2, 2, 8, (16+ref)^(s->mb_y&1), 1);
2400                     }
2401                 }
2402             }
2403         }
2404     } else {
2405         linesize   = h->mb_linesize   = s->linesize;
2406         uvlinesize = h->mb_uvlinesize = s->uvlinesize;
2407 //        dct_offset = s->linesize * 16;
2408     }
2409
2410     if (!simple && IS_INTRA_PCM(mb_type)) {
2411         for (i=0; i<16; i++) {
2412             memcpy(dest_y + i*  linesize, h->mb       + i*8, 16);
2413         }
2414         for (i=0; i<8; i++) {
2415             memcpy(dest_cb+ i*uvlinesize, h->mb + 128 + i*4,  8);
2416             memcpy(dest_cr+ i*uvlinesize, h->mb + 160 + i*4,  8);
2417         }
2418     } else {
2419         if(IS_INTRA(mb_type)){
2420             if(h->deblocking_filter)
2421                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 1, simple);
2422
2423             if(simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
2424                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cb, uvlinesize);
2425                 h->hpc.pred8x8[ h->chroma_pred_mode ](dest_cr, uvlinesize);
2426             }
2427
2428             if(IS_INTRA4x4(mb_type)){
2429                 if(simple || !s->encoding){
2430                     if(IS_8x8DCT(mb_type)){
2431                         if(transform_bypass){
2432                             idct_dc_add =
2433                             idct_add    = s->dsp.add_pixels8;
2434                         }else{
2435                             idct_dc_add = s->dsp.h264_idct8_dc_add;
2436                             idct_add    = s->dsp.h264_idct8_add;
2437                         }
2438                         for(i=0; i<16; i+=4){
2439                             uint8_t * const ptr= dest_y + block_offset[i];
2440                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2441                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2442                                 h->hpc.pred8x8l_add[dir](ptr, h->mb + i*16, linesize);
2443                             }else{
2444                                 const int nnz = h->non_zero_count_cache[ scan8[i] ];
2445                                 h->hpc.pred8x8l[ dir ](ptr, (h->topleft_samples_available<<i)&0x8000,
2446                                                             (h->topright_samples_available<<i)&0x4000, linesize);
2447                                 if(nnz){
2448                                     if(nnz == 1 && h->mb[i*16])
2449                                         idct_dc_add(ptr, h->mb + i*16, linesize);
2450                                     else
2451                                         idct_add   (ptr, h->mb + i*16, linesize);
2452                                 }
2453                             }
2454                         }
2455                     }else{
2456                         if(transform_bypass){
2457                             idct_dc_add =
2458                             idct_add    = s->dsp.add_pixels4;
2459                         }else{
2460                             idct_dc_add = s->dsp.h264_idct_dc_add;
2461                             idct_add    = s->dsp.h264_idct_add;
2462                         }
2463                         for(i=0; i<16; i++){
2464                             uint8_t * const ptr= dest_y + block_offset[i];
2465                             const int dir= h->intra4x4_pred_mode_cache[ scan8[i] ];
2466
2467                             if(transform_bypass && h->sps.profile_idc==244 && dir<=1){
2468                                 h->hpc.pred4x4_add[dir](ptr, h->mb + i*16, linesize);
2469                             }else{
2470                                 uint8_t *topright;
2471                                 int nnz, tr;
2472                                 if(dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED){
2473                                     const int topright_avail= (h->topright_samples_available<<i)&0x8000;
2474                                     assert(mb_y || linesize <= block_offset[i]);
2475                                     if(!topright_avail){
2476                                         tr= ptr[3 - linesize]*0x01010101;
2477                                         topright= (uint8_t*) &tr;
2478                                     }else
2479                                         topright= ptr + 4 - linesize;
2480                                 }else
2481                                     topright= NULL;
2482
2483                                 h->hpc.pred4x4[ dir ](ptr, topright, linesize);
2484                                 nnz = h->non_zero_count_cache[ scan8[i] ];
2485                                 if(nnz){
2486                                     if(is_h264){
2487                                         if(nnz == 1 && h->mb[i*16])
2488                                             idct_dc_add(ptr, h->mb + i*16, linesize);
2489                                         else
2490                                             idct_add   (ptr, h->mb + i*16, linesize);
2491                                     }else
2492                                         svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, 0);
2493                                 }
2494                             }
2495                         }
2496                     }
2497                 }
2498             }else{
2499                 h->hpc.pred16x16[ h->intra16x16_pred_mode ](dest_y , linesize);
2500                 if(is_h264){
2501                     if(!transform_bypass)
2502                         h264_luma_dc_dequant_idct_c(h->mb, s->qscale, h->dequant4_coeff[0][s->qscale][0]);
2503                 }else
2504                     svq3_luma_dc_dequant_idct_c(h->mb, s->qscale);
2505             }
2506             if(h->deblocking_filter)
2507                 xchg_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, 0, simple);
2508         }else if(is_h264){
2509             hl_motion(h, dest_y, dest_cb, dest_cr,
2510                       s->me.qpel_put, s->dsp.put_h264_chroma_pixels_tab,
2511                       s->me.qpel_avg, s->dsp.avg_h264_chroma_pixels_tab,
2512                       s->dsp.weight_h264_pixels_tab, s->dsp.biweight_h264_pixels_tab);
2513         }
2514
2515
2516         if(!IS_INTRA4x4(mb_type)){
2517             if(is_h264){
2518                 if(IS_INTRA16x16(mb_type)){
2519                     if(transform_bypass){
2520                         if(h->sps.profile_idc==244 && (h->intra16x16_pred_mode==VERT_PRED8x8 || h->intra16x16_pred_mode==HOR_PRED8x8)){
2521                             h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset, h->mb, linesize);
2522                         }else{
2523                             for(i=0; i<16; i++){
2524                                 if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2525                                     s->dsp.add_pixels4(dest_y + block_offset[i], h->mb + i*16, linesize);
2526                             }
2527                         }
2528                     }else{
2529                          s->dsp.h264_idct_add16intra(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2530                     }
2531                 }else if(h->cbp&15){
2532                     if(transform_bypass){
2533                         const int di = IS_8x8DCT(mb_type) ? 4 : 1;
2534                         idct_add= IS_8x8DCT(mb_type) ? s->dsp.add_pixels8 : s->dsp.add_pixels4;
2535                         for(i=0; i<16; i+=di){
2536                             if(h->non_zero_count_cache[ scan8[i] ]){
2537                                 idct_add(dest_y + block_offset[i], h->mb + i*16, linesize);
2538                             }
2539                         }
2540                     }else{
2541                         if(IS_8x8DCT(mb_type)){
2542                             s->dsp.h264_idct8_add4(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2543                         }else{
2544                             s->dsp.h264_idct_add16(dest_y, block_offset, h->mb, linesize, h->non_zero_count_cache);
2545                         }
2546                     }
2547                 }
2548             }else{
2549                 for(i=0; i<16; i++){
2550                     if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ //FIXME benchmark weird rule, & below
2551                         uint8_t * const ptr= dest_y + block_offset[i];
2552                         svq3_add_idct_c(ptr, h->mb + i*16, linesize, s->qscale, IS_INTRA(mb_type) ? 1 : 0);
2553                     }
2554                 }
2555             }
2556         }
2557
2558         if((simple || !ENABLE_GRAY || !(s->flags&CODEC_FLAG_GRAY)) && (h->cbp&0x30)){
2559             uint8_t *dest[2] = {dest_cb, dest_cr};
2560             if(transform_bypass){
2561                 if(IS_INTRA(mb_type) && h->sps.profile_idc==244 && (h->chroma_pred_mode==VERT_PRED8x8 || h->chroma_pred_mode==HOR_PRED8x8)){
2562                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[0], block_offset + 16, h->mb + 16*16, uvlinesize);
2563                     h->hpc.pred8x8_add[h->chroma_pred_mode](dest[1], block_offset + 20, h->mb + 20*16, uvlinesize);
2564                 }else{
2565                     idct_add = s->dsp.add_pixels4;
2566                     for(i=16; i<16+8; i++){
2567                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16])
2568                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2569                     }
2570                 }
2571             }else{
2572                 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]);
2573                 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]);
2574                 if(is_h264){
2575                     idct_add = s->dsp.h264_idct_add;
2576                     idct_dc_add = s->dsp.h264_idct_dc_add;
2577                     for(i=16; i<16+8; i++){
2578                         if(h->non_zero_count_cache[ scan8[i] ])
2579                             idct_add   (dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2580                         else if(h->mb[i*16])
2581                             idct_dc_add(dest[(i&4)>>2] + block_offset[i], h->mb + i*16, uvlinesize);
2582                     }
2583                 }else{
2584                     for(i=16; i<16+8; i++){
2585                         if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){
2586                             uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i];
2587                             svq3_add_idct_c(ptr, h->mb + i*16, uvlinesize, chroma_qp[s->qscale + 12] - 12, 2);
2588                         }
2589                     }
2590                 }
2591             }
2592         }
2593     }
2594     if(h->deblocking_filter) {
2595         backup_mb_border(h, dest_y, dest_cb, dest_cr, linesize, uvlinesize, simple);
2596         fill_caches(h, mb_type, 1); //FIXME don't fill stuff which isn't used by filter_mb
2597         h->chroma_qp[0] = get_chroma_qp(h, 0, s->current_picture.qscale_table[mb_xy]);
2598         h->chroma_qp[1] = get_chroma_qp(h, 1, s->current_picture.qscale_table[mb_xy]);
2599         if (!simple && FRAME_MBAFF) {
2600             filter_mb     (h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2601         } else {
2602             filter_mb_fast(h, mb_x, mb_y, dest_y, dest_cb, dest_cr, linesize, uvlinesize);
2603         }
2604     }
2605 }
2606
2607 /**
2608  * Process a macroblock; this case avoids checks for expensive uncommon cases.
2609  */
2610 static void hl_decode_mb_simple(H264Context *h){
2611     hl_decode_mb_internal(h, 1);
2612 }
2613
2614 /**
2615  * Process a macroblock; this handles edge cases, such as interlacing.
2616  */
2617 static void av_noinline hl_decode_mb_complex(H264Context *h){
2618     hl_decode_mb_internal(h, 0);
2619 }
2620
2621 static void hl_decode_mb(H264Context *h){
2622     MpegEncContext * const s = &h->s;
2623     const int mb_xy= h->mb_xy;
2624     const int mb_type= s->current_picture.mb_type[mb_xy];
2625     int is_complex = ENABLE_SMALL || h->is_complex || IS_INTRA_PCM(mb_type) || s->qscale == 0;
2626
2627     if(ENABLE_H264_ENCODER && !s->decode)
2628         return;
2629
2630     if (is_complex)
2631         hl_decode_mb_complex(h);
2632     else hl_decode_mb_simple(h);
2633 }
2634
2635 static void pic_as_field(Picture *pic, const int parity){
2636     int i;
2637     for (i = 0; i < 4; ++i) {
2638         if (parity == PICT_BOTTOM_FIELD)
2639             pic->data[i] += pic->linesize[i];
2640         pic->reference = parity;
2641         pic->linesize[i] *= 2;
2642     }
2643     pic->poc= pic->field_poc[parity == PICT_BOTTOM_FIELD];
2644 }
2645
2646 static int split_field_copy(Picture *dest, Picture *src,
2647                             int parity, int id_add){
2648     int match = !!(src->reference & parity);
2649
2650     if (match) {
2651         *dest = *src;
2652         if(parity != PICT_FRAME){
2653             pic_as_field(dest, parity);
2654             dest->pic_id *= 2;
2655             dest->pic_id += id_add;
2656         }
2657     }
2658
2659     return match;
2660 }
2661
2662 static int build_def_list(Picture *def, Picture **in, int len, int is_long, int sel){
2663     int i[2]={0};
2664     int index=0;
2665
2666     while(i[0]<len || i[1]<len){
2667         while(i[0]<len && !(in[ i[0] ] && (in[ i[0] ]->reference & sel)))
2668             i[0]++;
2669         while(i[1]<len && !(in[ i[1] ] && (in[ i[1] ]->reference & (sel^3))))
2670             i[1]++;
2671         if(i[0] < len){
2672             in[ i[0] ]->pic_id= is_long ? i[0] : in[ i[0] ]->frame_num;
2673             split_field_copy(&def[index++], in[ i[0]++ ], sel  , 1);
2674         }
2675         if(i[1] < len){
2676             in[ i[1] ]->pic_id= is_long ? i[1] : in[ i[1] ]->frame_num;
2677             split_field_copy(&def[index++], in[ i[1]++ ], sel^3, 0);
2678         }
2679     }
2680
2681     return index;
2682 }
2683
2684 static int add_sorted(Picture **sorted, Picture **src, int len, int limit, int dir){
2685     int i, best_poc;
2686     int out_i= 0;
2687
2688     for(;;){
2689         best_poc= dir ? INT_MIN : INT_MAX;
2690
2691         for(i=0; i<len; i++){
2692             const int poc= src[i]->poc;
2693             if(((poc > limit) ^ dir) && ((poc < best_poc) ^ dir)){
2694                 best_poc= poc;
2695                 sorted[out_i]= src[i];
2696             }
2697         }
2698         if(best_poc == (dir ? INT_MIN : INT_MAX))
2699             break;
2700         limit= sorted[out_i++]->poc - dir;
2701     }
2702     return out_i;
2703 }
2704
2705 /**
2706  * fills the default_ref_list.
2707  */
2708 static int fill_default_ref_list(H264Context *h){
2709     MpegEncContext * const s = &h->s;
2710     int i, len;
2711
2712     if(h->slice_type_nos==FF_B_TYPE){
2713         Picture *sorted[32];
2714         int cur_poc, list;
2715         int lens[2];
2716
2717         if(FIELD_PICTURE)
2718             cur_poc= s->current_picture_ptr->field_poc[ s->picture_structure == PICT_BOTTOM_FIELD ];
2719         else
2720             cur_poc= s->current_picture_ptr->poc;
2721
2722         for(list= 0; list<2; list++){
2723             len= add_sorted(sorted    , h->short_ref, h->short_ref_count, cur_poc, 1^list);
2724             len+=add_sorted(sorted+len, h->short_ref, h->short_ref_count, cur_poc, 0^list);
2725             assert(len<=32);
2726             len= build_def_list(h->default_ref_list[list]    , sorted     , len, 0, s->picture_structure);
2727             len+=build_def_list(h->default_ref_list[list]+len, h->long_ref, 16 , 1, s->picture_structure);
2728             assert(len<=32);
2729
2730             if(len < h->ref_count[list])
2731                 memset(&h->default_ref_list[list][len], 0, sizeof(Picture)*(h->ref_count[list] - len));
2732             lens[list]= len;
2733         }
2734
2735         if(lens[0] == lens[1] && lens[1] > 1){
2736             for(i=0; h->default_ref_list[0][i].data[0] == h->default_ref_list[1][i].data[0] && i<lens[0]; i++);
2737             if(i == lens[0])
2738                 FFSWAP(Picture, h->default_ref_list[1][0], h->default_ref_list[1][1]);
2739         }
2740     }else{
2741         len = build_def_list(h->default_ref_list[0]    , h->short_ref, h->short_ref_count, 0, s->picture_structure);
2742         len+= build_def_list(h->default_ref_list[0]+len, h-> long_ref, 16                , 1, s->picture_structure);
2743         assert(len <= 32);
2744         if(len < h->ref_count[0])
2745             memset(&h->default_ref_list[0][len], 0, sizeof(Picture)*(h->ref_count[0] - len));
2746     }
2747 #ifdef TRACE
2748     for (i=0; i<h->ref_count[0]; i++) {
2749         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]);
2750     }
2751     if(h->slice_type_nos==FF_B_TYPE){
2752         for (i=0; i<h->ref_count[1]; i++) {
2753             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[1][i].data[0]);
2754         }
2755     }
2756 #endif
2757     return 0;
2758 }
2759
2760 static void print_short_term(H264Context *h);
2761 static void print_long_term(H264Context *h);
2762
2763 /**
2764  * Extract structure information about the picture described by pic_num in
2765  * the current decoding context (frame or field). Note that pic_num is
2766  * picture number without wrapping (so, 0<=pic_num<max_pic_num).
2767  * @param pic_num picture number for which to extract structure information
2768  * @param structure one of PICT_XXX describing structure of picture
2769  *                      with pic_num
2770  * @return frame number (short term) or long term index of picture
2771  *         described by pic_num
2772  */
2773 static int pic_num_extract(H264Context *h, int pic_num, int *structure){
2774     MpegEncContext * const s = &h->s;
2775
2776     *structure = s->picture_structure;
2777     if(FIELD_PICTURE){
2778         if (!(pic_num & 1))
2779             /* opposite field */
2780             *structure ^= PICT_FRAME;
2781         pic_num >>= 1;
2782     }
2783
2784     return pic_num;
2785 }
2786
2787 static int decode_ref_pic_list_reordering(H264Context *h){
2788     MpegEncContext * const s = &h->s;
2789     int list, index, pic_structure;
2790
2791     print_short_term(h);
2792     print_long_term(h);
2793
2794     for(list=0; list<h->list_count; list++){
2795         memcpy(h->ref_list[list], h->default_ref_list[list], sizeof(Picture)*h->ref_count[list]);
2796
2797         if(get_bits1(&s->gb)){
2798             int pred= h->curr_pic_num;
2799
2800             for(index=0; ; index++){
2801                 unsigned int reordering_of_pic_nums_idc= get_ue_golomb(&s->gb);
2802                 unsigned int pic_id;
2803                 int i;
2804                 Picture *ref = NULL;
2805
2806                 if(reordering_of_pic_nums_idc==3)
2807                     break;
2808
2809                 if(index >= h->ref_count[list]){
2810                     av_log(h->s.avctx, AV_LOG_ERROR, "reference count overflow\n");
2811                     return -1;
2812                 }
2813
2814                 if(reordering_of_pic_nums_idc<3){
2815                     if(reordering_of_pic_nums_idc<2){
2816                         const unsigned int abs_diff_pic_num= get_ue_golomb(&s->gb) + 1;
2817                         int frame_num;
2818
2819                         if(abs_diff_pic_num > h->max_pic_num){
2820                             av_log(h->s.avctx, AV_LOG_ERROR, "abs_diff_pic_num overflow\n");
2821                             return -1;
2822                         }
2823
2824                         if(reordering_of_pic_nums_idc == 0) pred-= abs_diff_pic_num;
2825                         else                                pred+= abs_diff_pic_num;
2826                         pred &= h->max_pic_num - 1;
2827
2828                         frame_num = pic_num_extract(h, pred, &pic_structure);
2829
2830                         for(i= h->short_ref_count-1; i>=0; i--){
2831                             ref = h->short_ref[i];
2832                             assert(ref->reference);
2833                             assert(!ref->long_ref);
2834                             if(
2835                                    ref->frame_num == frame_num &&
2836                                    (ref->reference & pic_structure)
2837                               )
2838                                 break;
2839                         }
2840                         if(i>=0)
2841                             ref->pic_id= pred;
2842                     }else{
2843                         int long_idx;
2844                         pic_id= get_ue_golomb(&s->gb); //long_term_pic_idx
2845
2846                         long_idx= pic_num_extract(h, pic_id, &pic_structure);
2847
2848                         if(long_idx>31){
2849                             av_log(h->s.avctx, AV_LOG_ERROR, "long_term_pic_idx overflow\n");
2850                             return -1;
2851                         }
2852                         ref = h->long_ref[long_idx];
2853                         assert(!(ref && !ref->reference));
2854                         if(ref && (ref->reference & pic_structure)){
2855                             ref->pic_id= pic_id;
2856                             assert(ref->long_ref);
2857                             i=0;
2858                         }else{
2859                             i=-1;
2860                         }
2861                     }
2862
2863                     if (i < 0) {
2864                         av_log(h->s.avctx, AV_LOG_ERROR, "reference picture missing during reorder\n");
2865                         memset(&h->ref_list[list][index], 0, sizeof(Picture)); //FIXME
2866                     } else {
2867                         for(i=index; i+1<h->ref_count[list]; i++){
2868                             if(ref->long_ref == h->ref_list[list][i].long_ref && ref->pic_id == h->ref_list[list][i].pic_id)
2869                                 break;
2870                         }
2871                         for(; i > index; i--){
2872                             h->ref_list[list][i]= h->ref_list[list][i-1];
2873                         }
2874                         h->ref_list[list][index]= *ref;
2875                         if (FIELD_PICTURE){
2876                             pic_as_field(&h->ref_list[list][index], pic_structure);
2877                         }
2878                     }
2879                 }else{
2880                     av_log(h->s.avctx, AV_LOG_ERROR, "illegal reordering_of_pic_nums_idc\n");
2881                     return -1;
2882                 }
2883             }
2884         }
2885     }
2886     for(list=0; list<h->list_count; list++){
2887         for(index= 0; index < h->ref_count[list]; index++){
2888             if(!h->ref_list[list][index].data[0]){
2889                 av_log(h->s.avctx, AV_LOG_ERROR, "Missing reference picture\n");
2890                 h->ref_list[list][index]= s->current_picture; //FIXME this is not a sensible solution
2891             }
2892         }
2893     }
2894
2895     return 0;
2896 }
2897
2898 static void fill_mbaff_ref_list(H264Context *h){
2899     int list, i, j;
2900     for(list=0; list<2; list++){ //FIXME try list_count
2901         for(i=0; i<h->ref_count[list]; i++){
2902             Picture *frame = &h->ref_list[list][i];
2903             Picture *field = &h->ref_list[list][16+2*i];
2904             field[0] = *frame;
2905             for(j=0; j<3; j++)
2906                 field[0].linesize[j] <<= 1;
2907             field[0].reference = PICT_TOP_FIELD;
2908             field[0].poc= field[0].field_poc[0];
2909             field[1] = field[0];
2910             for(j=0; j<3; j++)
2911                 field[1].data[j] += frame->linesize[j];
2912             field[1].reference = PICT_BOTTOM_FIELD;
2913             field[1].poc= field[1].field_poc[1];
2914
2915             h->luma_weight[list][16+2*i] = h->luma_weight[list][16+2*i+1] = h->luma_weight[list][i];
2916             h->luma_offset[list][16+2*i] = h->luma_offset[list][16+2*i+1] = h->luma_offset[list][i];
2917             for(j=0; j<2; j++){
2918                 h->chroma_weight[list][16+2*i][j] = h->chroma_weight[list][16+2*i+1][j] = h->chroma_weight[list][i][j];
2919                 h->chroma_offset[list][16+2*i][j] = h->chroma_offset[list][16+2*i+1][j] = h->chroma_offset[list][i][j];
2920             }
2921         }
2922     }
2923     for(j=0; j<h->ref_count[1]; j++){
2924         for(i=0; i<h->ref_count[0]; i++)
2925             h->implicit_weight[j][16+2*i] = h->implicit_weight[j][16+2*i+1] = h->implicit_weight[j][i];
2926         memcpy(h->implicit_weight[16+2*j],   h->implicit_weight[j], sizeof(*h->implicit_weight));
2927         memcpy(h->implicit_weight[16+2*j+1], h->implicit_weight[j], sizeof(*h->implicit_weight));
2928     }
2929 }
2930
2931 static int pred_weight_table(H264Context *h){
2932     MpegEncContext * const s = &h->s;
2933     int list, i;
2934     int luma_def, chroma_def;
2935
2936     h->use_weight= 0;
2937     h->use_weight_chroma= 0;
2938     h->luma_log2_weight_denom= get_ue_golomb(&s->gb);
2939     h->chroma_log2_weight_denom= get_ue_golomb(&s->gb);
2940     luma_def = 1<<h->luma_log2_weight_denom;
2941     chroma_def = 1<<h->chroma_log2_weight_denom;
2942
2943     for(list=0; list<2; list++){
2944         for(i=0; i<h->ref_count[list]; i++){
2945             int luma_weight_flag, chroma_weight_flag;
2946
2947             luma_weight_flag= get_bits1(&s->gb);
2948             if(luma_weight_flag){
2949                 h->luma_weight[list][i]= get_se_golomb(&s->gb);
2950                 h->luma_offset[list][i]= get_se_golomb(&s->gb);
2951                 if(   h->luma_weight[list][i] != luma_def
2952                    || h->luma_offset[list][i] != 0)
2953                     h->use_weight= 1;
2954             }else{
2955                 h->luma_weight[list][i]= luma_def;
2956                 h->luma_offset[list][i]= 0;
2957             }
2958
2959             if(CHROMA){
2960                 chroma_weight_flag= get_bits1(&s->gb);
2961                 if(chroma_weight_flag){
2962                     int j;
2963                     for(j=0; j<2; j++){
2964                         h->chroma_weight[list][i][j]= get_se_golomb(&s->gb);
2965                         h->chroma_offset[list][i][j]= get_se_golomb(&s->gb);
2966                         if(   h->chroma_weight[list][i][j] != chroma_def
2967                         || h->chroma_offset[list][i][j] != 0)
2968                             h->use_weight_chroma= 1;
2969                     }
2970                 }else{
2971                     int j;
2972                     for(j=0; j<2; j++){
2973                         h->chroma_weight[list][i][j]= chroma_def;
2974                         h->chroma_offset[list][i][j]= 0;
2975                     }
2976                 }
2977             }
2978         }
2979         if(h->slice_type_nos != FF_B_TYPE) break;
2980     }
2981     h->use_weight= h->use_weight || h->use_weight_chroma;
2982     return 0;
2983 }
2984
2985 static void implicit_weight_table(H264Context *h){
2986     MpegEncContext * const s = &h->s;
2987     int ref0, ref1;
2988     int cur_poc = s->current_picture_ptr->poc;
2989
2990     if(   h->ref_count[0] == 1 && h->ref_count[1] == 1
2991        && h->ref_list[0][0].poc + h->ref_list[1][0].poc == 2*cur_poc){
2992         h->use_weight= 0;
2993         h->use_weight_chroma= 0;
2994         return;
2995     }
2996
2997     h->use_weight= 2;
2998     h->use_weight_chroma= 2;
2999     h->luma_log2_weight_denom= 5;
3000     h->chroma_log2_weight_denom= 5;
3001
3002     for(ref0=0; ref0 < h->ref_count[0]; ref0++){
3003         int poc0 = h->ref_list[0][ref0].poc;
3004         for(ref1=0; ref1 < h->ref_count[1]; ref1++){
3005             int poc1 = h->ref_list[1][ref1].poc;
3006             int td = av_clip(poc1 - poc0, -128, 127);
3007             if(td){
3008                 int tb = av_clip(cur_poc - poc0, -128, 127);
3009                 int tx = (16384 + (FFABS(td) >> 1)) / td;
3010                 int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
3011                 if(dist_scale_factor < -64 || dist_scale_factor > 128)
3012                     h->implicit_weight[ref0][ref1] = 32;
3013                 else
3014                     h->implicit_weight[ref0][ref1] = 64 - dist_scale_factor;
3015             }else
3016                 h->implicit_weight[ref0][ref1] = 32;
3017         }
3018     }
3019 }
3020
3021 /**
3022  * Mark a picture as no longer needed for reference. The refmask
3023  * argument allows unreferencing of individual fields or the whole frame.
3024  * If the picture becomes entirely unreferenced, but is being held for
3025  * display purposes, it is marked as such.
3026  * @param refmask mask of fields to unreference; the mask is bitwise
3027  *                anded with the reference marking of pic
3028  * @return non-zero if pic becomes entirely unreferenced (except possibly
3029  *         for display purposes) zero if one of the fields remains in
3030  *         reference
3031  */
3032 static inline int unreference_pic(H264Context *h, Picture *pic, int refmask){
3033     int i;
3034     if (pic->reference &= refmask) {
3035         return 0;
3036     } else {
3037         for(i = 0; h->delayed_pic[i]; i++)
3038             if(pic == h->delayed_pic[i]){
3039                 pic->reference=DELAYED_PIC_REF;
3040                 break;
3041             }
3042         return 1;
3043     }
3044 }
3045
3046 /**
3047  * instantaneous decoder refresh.
3048  */
3049 static void idr(H264Context *h){
3050     int i;
3051
3052     for(i=0; i<16; i++){
3053         remove_long(h, i, 0);
3054     }
3055     assert(h->long_ref_count==0);
3056
3057     for(i=0; i<h->short_ref_count; i++){
3058         unreference_pic(h, h->short_ref[i], 0);
3059         h->short_ref[i]= NULL;
3060     }
3061     h->short_ref_count=0;
3062     h->prev_frame_num= 0;
3063     h->prev_frame_num_offset= 0;
3064     h->prev_poc_msb=
3065     h->prev_poc_lsb= 0;
3066 }
3067
3068 /* forget old pics after a seek */
3069 static void flush_dpb(AVCodecContext *avctx){
3070     H264Context *h= avctx->priv_data;
3071     int i;
3072     for(i=0; i<MAX_DELAYED_PIC_COUNT; i++) {
3073         if(h->delayed_pic[i])
3074             h->delayed_pic[i]->reference= 0;
3075         h->delayed_pic[i]= NULL;
3076     }
3077     h->outputed_poc= INT_MIN;
3078     idr(h);
3079     if(h->s.current_picture_ptr)
3080         h->s.current_picture_ptr->reference= 0;
3081     h->s.first_field= 0;
3082     ff_mpeg_flush(avctx);
3083 }
3084
3085 /**
3086  * Find a Picture in the short term reference list by frame number.
3087  * @param frame_num frame number to search for
3088  * @param idx the index into h->short_ref where returned picture is found
3089  *            undefined if no picture found.
3090  * @return pointer to the found picture, or NULL if no pic with the provided
3091  *                 frame number is found
3092  */
3093 static Picture * find_short(H264Context *h, int frame_num, int *idx){
3094     MpegEncContext * const s = &h->s;
3095     int i;
3096
3097     for(i=0; i<h->short_ref_count; i++){
3098         Picture *pic= h->short_ref[i];
3099         if(s->avctx->debug&FF_DEBUG_MMCO)
3100             av_log(h->s.avctx, AV_LOG_DEBUG, "%d %d %p\n", i, pic->frame_num, pic);
3101         if(pic->frame_num == frame_num) {
3102             *idx = i;
3103             return pic;
3104         }
3105     }
3106     return NULL;
3107 }
3108
3109 /**
3110  * Remove a picture from the short term reference list by its index in
3111  * that list.  This does no checking on the provided index; it is assumed
3112  * to be valid. Other list entries are shifted down.
3113  * @param i index into h->short_ref of picture to remove.
3114  */
3115 static void remove_short_at_index(H264Context *h, int i){
3116     assert(i >= 0 && i < h->short_ref_count);
3117     h->short_ref[i]= NULL;
3118     if (--h->short_ref_count)
3119         memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i)*sizeof(Picture*));
3120 }
3121
3122 /**
3123  *
3124  * @return the removed picture or NULL if an error occurs
3125  */
3126 static Picture * remove_short(H264Context *h, int frame_num, int ref_mask){
3127     MpegEncContext * const s = &h->s;
3128     Picture *pic;
3129     int i;
3130
3131     if(s->avctx->debug&FF_DEBUG_MMCO)
3132         av_log(h->s.avctx, AV_LOG_DEBUG, "remove short %d count %d\n", frame_num, h->short_ref_count);
3133
3134     pic = find_short(h, frame_num, &i);
3135     if (pic){
3136         if(unreference_pic(h, pic, ref_mask))
3137         remove_short_at_index(h, i);
3138     }
3139
3140     return pic;
3141 }
3142
3143 /**
3144  * Remove a picture from the long term reference list by its index in
3145  * that list.
3146  * @return the removed picture or NULL if an error occurs
3147  */
3148 static Picture * remove_long(H264Context *h, int i, int ref_mask){
3149     Picture *pic;
3150
3151     pic= h->long_ref[i];
3152     if (pic){
3153         if(unreference_pic(h, pic, ref_mask)){
3154             assert(h->long_ref[i]->long_ref == 1);
3155             h->long_ref[i]->long_ref= 0;
3156             h->long_ref[i]= NULL;
3157             h->long_ref_count--;
3158         }
3159     }
3160
3161     return pic;
3162 }
3163
3164 /**
3165  * print short term list
3166  */
3167 static void print_short_term(H264Context *h) {
3168     uint32_t i;
3169     if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3170         av_log(h->s.avctx, AV_LOG_DEBUG, "short term list:\n");
3171         for(i=0; i<h->short_ref_count; i++){
3172             Picture *pic= h->short_ref[i];
3173             av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3174         }
3175     }
3176 }
3177
3178 /**
3179  * print long term list
3180  */
3181 static void print_long_term(H264Context *h) {
3182     uint32_t i;
3183     if(h->s.avctx->debug&FF_DEBUG_MMCO) {
3184         av_log(h->s.avctx, AV_LOG_DEBUG, "long term list:\n");
3185         for(i = 0; i < 16; i++){
3186             Picture *pic= h->long_ref[i];
3187             if (pic) {
3188                 av_log(h->s.avctx, AV_LOG_DEBUG, "%d fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->data[0]);
3189             }
3190         }
3191     }
3192 }
3193
3194 /**
3195  * Executes the reference picture marking (memory management control operations).
3196  */
3197 static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
3198     MpegEncContext * const s = &h->s;
3199     int i, j;
3200     int current_ref_assigned=0;
3201     Picture *pic;
3202
3203     if((s->avctx->debug&FF_DEBUG_MMCO) && mmco_count==0)
3204         av_log(h->s.avctx, AV_LOG_DEBUG, "no mmco here\n");
3205
3206     for(i=0; i<mmco_count; i++){
3207         int structure, frame_num;
3208         if(s->avctx->debug&FF_DEBUG_MMCO)
3209             av_log(h->s.avctx, AV_LOG_DEBUG, "mmco:%d %d %d\n", h->mmco[i].opcode, h->mmco[i].short_pic_num, h->mmco[i].long_arg);
3210
3211         if(   mmco[i].opcode == MMCO_SHORT2UNUSED
3212            || mmco[i].opcode == MMCO_SHORT2LONG){
3213             frame_num = pic_num_extract(h, mmco[i].short_pic_num, &structure);
3214             pic = find_short(h, frame_num, &j);
3215             if(!pic){
3216                 if(mmco[i].opcode != MMCO_SHORT2LONG || !h->long_ref[mmco[i].long_arg]
3217                    || h->long_ref[mmco[i].long_arg]->frame_num != frame_num)
3218                 av_log(h->s.avctx, AV_LOG_ERROR, "mmco: unref short failure\n");
3219                 continue;
3220             }
3221         }
3222
3223         switch(mmco[i].opcode){
3224         case MMCO_SHORT2UNUSED:
3225             if(s->avctx->debug&FF_DEBUG_MMCO)
3226                 av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref short %d count %d\n", h->mmco[i].short_pic_num, h->short_ref_count);
3227             remove_short(h, frame_num, structure ^ PICT_FRAME);
3228             break;
3229         case MMCO_SHORT2LONG:
3230                 if (h->long_ref[mmco[i].long_arg] != pic)
3231                     remove_long(h, mmco[i].long_arg, 0);
3232
3233                 remove_short_at_index(h, j);
3234                 h->long_ref[ mmco[i].long_arg ]= pic;
3235                 if (h->long_ref[ mmco[i].long_arg ]){
3236                     h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3237                     h->long_ref_count++;
3238                 }
3239             break;
3240         case MMCO_LONG2UNUSED:
3241             j = pic_num_extract(h, mmco[i].long_arg, &structure);
3242             pic = h->long_ref[j];
3243             if (pic) {
3244                 remove_long(h, j, structure ^ PICT_FRAME);
3245             } else if(s->avctx->debug&FF_DEBUG_MMCO)
3246                 av_log(h->s.avctx, AV_LOG_DEBUG, "mmco: unref long failure\n");
3247             break;
3248         case MMCO_LONG:
3249                     // Comment below left from previous code as it is an interresting note.
3250                     /* First field in pair is in short term list or
3251                      * at a different long term index.
3252                      * This is not allowed; see 7.4.3.3, notes 2 and 3.
3253                      * Report the problem and keep the pair where it is,
3254                      * and mark this field valid.
3255                      */
3256
3257             if (h->long_ref[mmco[i].long_arg] != s->current_picture_ptr) {
3258                 remove_long(h, mmco[i].long_arg, 0);
3259
3260                 h->long_ref[ mmco[i].long_arg ]= s->current_picture_ptr;
3261                 h->long_ref[ mmco[i].long_arg ]->long_ref=1;
3262                 h->long_ref_count++;
3263             }
3264
3265             s->current_picture_ptr->reference |= s->picture_structure;
3266             current_ref_assigned=1;
3267             break;
3268         case MMCO_SET_MAX_LONG:
3269             assert(mmco[i].long_arg <= 16);
3270             // just remove the long term which index is greater than new max
3271             for(j = mmco[i].long_arg; j<16; j++){
3272                 remove_long(h, j, 0);
3273             }
3274             break;
3275         case MMCO_RESET:
3276             while(h->short_ref_count){
3277                 remove_short(h, h->short_ref[0]->frame_num, 0);
3278             }
3279             for(j = 0; j < 16; j++) {
3280                 remove_long(h, j, 0);
3281             }
3282             s->current_picture_ptr->poc=
3283             s->current_picture_ptr->field_poc[0]=
3284             s->current_picture_ptr->field_poc[1]=
3285             h->poc_lsb=
3286             h->poc_msb=
3287             h->frame_num=
3288             s->current_picture_ptr->frame_num= 0;
3289             break;
3290         default: assert(0);
3291         }
3292     }
3293
3294     if (!current_ref_assigned) {
3295         /* Second field of complementary field pair; the first field of
3296          * which is already referenced. If short referenced, it
3297          * should be first entry in short_ref. If not, it must exist
3298          * in long_ref; trying to put it on the short list here is an
3299          * error in the encoded bit stream (ref: 7.4.3.3, NOTE 2 and 3).
3300          */
3301         if (h->short_ref_count && h->short_ref[0] == s->current_picture_ptr) {
3302             /* Just mark the second field valid */
3303             s->current_picture_ptr->reference = PICT_FRAME;
3304         } else if (s->current_picture_ptr->long_ref) {
3305             av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term reference "
3306                                              "assignment for second field "
3307                                              "in complementary field pair "
3308                                              "(first field is long term)\n");
3309         } else {
3310             pic= remove_short(h, s->current_picture_ptr->frame_num, 0);
3311             if(pic){
3312                 av_log(h->s.avctx, AV_LOG_ERROR, "illegal short term buffer state detected\n");
3313             }
3314
3315             if(h->short_ref_count)
3316                 memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
3317
3318             h->short_ref[0]= s->current_picture_ptr;
3319             h->short_ref_count++;
3320             s->current_picture_ptr->reference |= s->picture_structure;
3321         }
3322     }
3323
3324     if (h->long_ref_count + h->short_ref_count > h->sps.ref_frame_count){
3325
3326         /* We have too many reference frames, probably due to corrupted
3327          * stream. Need to discard one frame. Prevents overrun of the
3328          * short_ref and long_ref buffers.
3329          */
3330         av_log(h->s.avctx, AV_LOG_ERROR,
3331                "number of reference frames exceeds max (probably "
3332                "corrupt input), discarding one\n");
3333
3334         if (h->long_ref_count && !h->short_ref_count) {
3335             for (i = 0; i < 16; ++i)
3336                 if (h->long_ref[i])
3337                     break;
3338
3339             assert(i < 16);
3340             remove_long(h, i, 0);
3341         } else {
3342             pic = h->short_ref[h->short_ref_count - 1];
3343             remove_short(h, pic->frame_num, 0);
3344         }
3345     }
3346
3347     print_short_term(h);
3348     print_long_term(h);
3349     return 0;
3350 }
3351
3352 static int decode_ref_pic_marking(H264Context *h, GetBitContext *gb){
3353     MpegEncContext * const s = &h->s;
3354     int i;
3355
3356     h->mmco_index= 0;
3357     if(h->nal_unit_type == NAL_IDR_SLICE){ //FIXME fields
3358         s->broken_link= get_bits1(gb) -1;
3359         if(get_bits1(gb)){
3360             h->mmco[0].opcode= MMCO_LONG;
3361             h->mmco[0].long_arg= 0;
3362             h->mmco_index= 1;
3363         }
3364     }else{
3365         if(get_bits1(gb)){ // adaptive_ref_pic_marking_mode_flag
3366             for(i= 0; i<MAX_MMCO_COUNT; i++) {
3367                 MMCOOpcode opcode= get_ue_golomb(gb);
3368
3369                 h->mmco[i].opcode= opcode;
3370                 if(opcode==MMCO_SHORT2UNUSED || opcode==MMCO_SHORT2LONG){
3371                     h->mmco[i].short_pic_num= (h->curr_pic_num - get_ue_golomb(gb) - 1) & (h->max_pic_num - 1);
3372 /*                    if(h->mmco[i].short_pic_num >= h->short_ref_count || h->short_ref[ h->mmco[i].short_pic_num ] == NULL){
3373                         av_log(s->avctx, AV_LOG_ERROR, "illegal short ref in memory management control operation %d\n", mmco);
3374                         return -1;
3375                     }*/
3376                 }
3377                 if(opcode==MMCO_SHORT2LONG || opcode==MMCO_LONG2UNUSED || opcode==MMCO_LONG || opcode==MMCO_SET_MAX_LONG){
3378                     unsigned int long_arg= get_ue_golomb(gb);
3379                     if(long_arg >= 32 || (long_arg >= 16 && !(opcode == MMCO_LONG2UNUSED && FIELD_PICTURE))){
3380                         av_log(h->s.avctx, AV_LOG_ERROR, "illegal long ref in memory management control operation %d\n", opcode);
3381                         return -1;
3382                     }
3383                     h->mmco[i].long_arg= long_arg;
3384                 }
3385
3386                 if(opcode > (unsigned)MMCO_LONG){
3387                     av_log(h->s.avctx, AV_LOG_ERROR, "illegal memory management control operation %d\n", opcode);
3388                     return -1;
3389                 }
3390                 if(opcode == MMCO_END)
3391                     break;
3392             }
3393             h->mmco_index= i;
3394         }else{
3395             assert(h->long_ref_count + h->short_ref_count <= h->sps.ref_frame_count);
3396
3397             if(h->short_ref_count && h->long_ref_count + h->short_ref_count == h->sps.ref_frame_count &&
3398                     !(FIELD_PICTURE && !s->first_field && s->current_picture_ptr->reference)) {
3399                 h->mmco[0].opcode= MMCO_SHORT2UNUSED;
3400                 h->mmco[0].short_pic_num= h->short_ref[ h->short_ref_count - 1 ]->frame_num;
3401                 h->mmco_index= 1;
3402                 if (FIELD_PICTURE) {
3403                     h->mmco[0].short_pic_num *= 2;
3404                     h->mmco[1].opcode= MMCO_SHORT2UNUSED;
3405                     h->mmco[1].short_pic_num= h->mmco[0].short_pic_num + 1;
3406                     h->mmco_index= 2;
3407                 }
3408             }
3409         }
3410     }
3411
3412     return 0;
3413 }
3414
3415 static int init_poc(H264Context *h){
3416     MpegEncContext * const s = &h->s;
3417     const int max_frame_num= 1<<h->sps.log2_max_frame_num;
3418     int field_poc[2];
3419     Picture *cur = s->current_picture_ptr;
3420
3421     h->frame_num_offset= h->prev_frame_num_offset;
3422     if(h->frame_num < h->prev_frame_num)
3423         h->frame_num_offset += max_frame_num;
3424
3425     if(h->sps.poc_type==0){
3426         const int max_poc_lsb= 1<<h->sps.log2_max_poc_lsb;
3427
3428         if     (h->poc_lsb < h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb/2)
3429             h->poc_msb = h->prev_poc_msb + max_poc_lsb;
3430         else if(h->poc_lsb > h->prev_poc_lsb && h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb/2)
3431             h->poc_msb = h->prev_poc_msb - max_poc_lsb;
3432         else
3433             h->poc_msb = h->prev_poc_msb;
3434 //printf("poc: %d %d\n", h->poc_msb, h->poc_lsb);
3435         field_poc[0] =
3436         field_poc[1] = h->poc_msb + h->poc_lsb;
3437         if(s->picture_structure == PICT_FRAME)
3438             field_poc[1] += h->delta_poc_bottom;
3439     }else if(h->sps.poc_type==1){
3440         int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
3441         int i;
3442
3443         if(h->sps.poc_cycle_length != 0)
3444             abs_frame_num = h->frame_num_offset + h->frame_num;
3445         else
3446             abs_frame_num = 0;
3447
3448         if(h->nal_ref_idc==0 && abs_frame_num > 0)
3449             abs_frame_num--;
3450
3451         expected_delta_per_poc_cycle = 0;
3452         for(i=0; i < h->sps.poc_cycle_length; i++)
3453             expected_delta_per_poc_cycle += h->sps.offset_for_ref_frame[ i ]; //FIXME integrate during sps parse
3454
3455         if(abs_frame_num > 0){
3456             int poc_cycle_cnt          = (abs_frame_num - 1) / h->sps.poc_cycle_length;
3457             int frame_num_in_poc_cycle = (abs_frame_num - 1) % h->sps.poc_cycle_length;
3458
3459             expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
3460             for(i = 0; i <= frame_num_in_poc_cycle; i++)
3461                 expectedpoc = expectedpoc + h->sps.offset_for_ref_frame[ i ];
3462         } else
3463             expectedpoc = 0;
3464
3465         if(h->nal_ref_idc == 0)
3466             expectedpoc = expectedpoc + h->sps.offset_for_non_ref_pic;
3467
3468         field_poc[0] = expectedpoc + h->delta_poc[0];
3469         field_poc[1] = field_poc[0] + h->sps.offset_for_top_to_bottom_field;
3470
3471         if(s->picture_structure == PICT_FRAME)
3472             field_poc[1] += h->delta_poc[1];
3473     }else{
3474         int poc= 2*(h->frame_num_offset + h->frame_num);
3475
3476         if(!h->nal_ref_idc)
3477             poc--;
3478
3479         field_poc[0]= poc;
3480         field_poc[1]= poc;
3481     }
3482
3483     if(s->picture_structure != PICT_BOTTOM_FIELD)
3484         s->current_picture_ptr->field_poc[0]= field_poc[0];
3485     if(s->picture_structure != PICT_TOP_FIELD)
3486         s->current_picture_ptr->field_poc[1]= field_poc[1];
3487     cur->poc= FFMIN(cur->field_poc[0], cur->field_poc[1]);
3488
3489     return 0;
3490 }
3491
3492
3493 /**
3494  * initialize scan tables
3495  */
3496 static void init_scan_tables(H264Context *h){
3497     MpegEncContext * const s = &h->s;
3498     int i;
3499     if(s->dsp.h264_idct_add == ff_h264_idct_add_c){ //FIXME little ugly
3500         memcpy(h->zigzag_scan, zigzag_scan, 16*sizeof(uint8_t));
3501         memcpy(h-> field_scan,  field_scan, 16*sizeof(uint8_t));
3502     }else{
3503         for(i=0; i<16; i++){
3504 #define T(x) (x>>2) | ((x<<2) & 0xF)
3505             h->zigzag_scan[i] = T(zigzag_scan[i]);
3506             h-> field_scan[i] = T( field_scan[i]);
3507 #undef T
3508         }
3509     }
3510     if(s->dsp.h264_idct8_add == ff_h264_idct8_add_c){
3511         memcpy(h->zigzag_scan8x8,       zigzag_scan8x8,       64*sizeof(uint8_t));
3512         memcpy(h->zigzag_scan8x8_cavlc, zigzag_scan8x8_cavlc, 64*sizeof(uint8_t));
3513         memcpy(h->field_scan8x8,        field_scan8x8,        64*sizeof(uint8_t));
3514         memcpy(h->field_scan8x8_cavlc,  field_scan8x8_cavlc,  64*sizeof(uint8_t));
3515     }else{
3516         for(i=0; i<64; i++){
3517 #define T(x) (x>>3) | ((x&7)<<3)
3518             h->zigzag_scan8x8[i]       = T(zigzag_scan8x8[i]);
3519             h->zigzag_scan8x8_cavlc[i] = T(zigzag_scan8x8_cavlc[i]);
3520             h->field_scan8x8[i]        = T(field_scan8x8[i]);
3521             h->field_scan8x8_cavlc[i]  = T(field_scan8x8_cavlc[i]);
3522 #undef T
3523         }
3524     }
3525     if(h->sps.transform_bypass){ //FIXME same ugly
3526         h->zigzag_scan_q0          = zigzag_scan;
3527         h->zigzag_scan8x8_q0       = zigzag_scan8x8;
3528         h->zigzag_scan8x8_cavlc_q0 = zigzag_scan8x8_cavlc;
3529         h->field_scan_q0           = field_scan;
3530         h->field_scan8x8_q0        = field_scan8x8;
3531         h->field_scan8x8_cavlc_q0  = field_scan8x8_cavlc;
3532     }else{
3533         h->zigzag_scan_q0          = h->zigzag_scan;
3534         h->zigzag_scan8x8_q0       = h->zigzag_scan8x8;
3535         h->zigzag_scan8x8_cavlc_q0 = h->zigzag_scan8x8_cavlc;
3536         h->field_scan_q0           = h->field_scan;
3537         h->field_scan8x8_q0        = h->field_scan8x8;
3538         h->field_scan8x8_cavlc_q0  = h->field_scan8x8_cavlc;
3539     }
3540 }
3541
3542 /**
3543  * Replicates H264 "master" context to thread contexts.
3544  */
3545 static void clone_slice(H264Context *dst, H264Context *src)
3546 {
3547     memcpy(dst->block_offset,     src->block_offset, sizeof(dst->block_offset));
3548     dst->s.current_picture_ptr  = src->s.current_picture_ptr;
3549     dst->s.current_picture      = src->s.current_picture;
3550     dst->s.linesize             = src->s.linesize;
3551     dst->s.uvlinesize           = src->s.uvlinesize;
3552     dst->s.first_field          = src->s.first_field;
3553
3554     dst->prev_poc_msb           = src->prev_poc_msb;
3555     dst->prev_poc_lsb           = src->prev_poc_lsb;
3556     dst->prev_frame_num_offset  = src->prev_frame_num_offset;
3557     dst->prev_frame_num         = src->prev_frame_num;
3558     dst->short_ref_count        = src->short_ref_count;
3559
3560     memcpy(dst->short_ref,        src->short_ref,        sizeof(dst->short_ref));
3561     memcpy(dst->long_ref,         src->long_ref,         sizeof(dst->long_ref));
3562     memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
3563     memcpy(dst->ref_list,         src->ref_list,         sizeof(dst->ref_list));
3564
3565     memcpy(dst->dequant4_coeff,   src->dequant4_coeff,   sizeof(src->dequant4_coeff));
3566     memcpy(dst->dequant8_coeff,   src->dequant8_coeff,   sizeof(src->dequant8_coeff));
3567 }
3568
3569 /**
3570  * decodes a slice header.
3571  * This will also call MPV_common_init() and frame_start() as needed.
3572  *
3573  * @param h h264context
3574  * @param h0 h264 master context (differs from 'h' when doing sliced based parallel decoding)
3575  *
3576  * @return 0 if okay, <0 if an error occurred, 1 if decoding must not be multithreaded
3577  */
3578 static int decode_slice_header(H264Context *h, H264Context *h0){
3579     MpegEncContext * const s = &h->s;
3580     MpegEncContext * const s0 = &h0->s;
3581     unsigned int first_mb_in_slice;
3582     unsigned int pps_id;
3583     int num_ref_idx_active_override_flag;
3584     unsigned int slice_type, tmp, i, j;
3585     int default_ref_list_done = 0;
3586     int last_pic_structure;
3587
3588     s->dropable= h->nal_ref_idc == 0;
3589
3590     if((s->avctx->flags2 & CODEC_FLAG2_FAST) && !h->nal_ref_idc){
3591         s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
3592         s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
3593     }else{
3594         s->me.qpel_put= s->dsp.put_h264_qpel_pixels_tab;
3595         s->me.qpel_avg= s->dsp.avg_h264_qpel_pixels_tab;
3596     }
3597
3598     first_mb_in_slice= get_ue_golomb(&s->gb);
3599
3600     if((s->flags2 & CODEC_FLAG2_CHUNKS) && first_mb_in_slice == 0){
3601         h0->current_slice = 0;
3602         if (!s0->first_field)
3603             s->current_picture_ptr= NULL;
3604     }
3605
3606     slice_type= get_ue_golomb(&s->gb);
3607     if(slice_type > 9){
3608         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);
3609         return -1;
3610     }
3611     if(slice_type > 4){
3612         slice_type -= 5;
3613         h->slice_type_fixed=1;
3614     }else
3615         h->slice_type_fixed=0;
3616
3617     slice_type= golomb_to_pict_type[ slice_type ];
3618     if (slice_type == FF_I_TYPE
3619         || (h0->current_slice != 0 && slice_type == h0->last_slice_type) ) {
3620         default_ref_list_done = 1;
3621     }
3622     h->slice_type= slice_type;
3623     h->slice_type_nos= slice_type & 3;
3624
3625     s->pict_type= h->slice_type; // to make a few old functions happy, it's wrong though
3626     if (s->pict_type == FF_B_TYPE && s0->last_picture_ptr == NULL) {
3627         av_log(h->s.avctx, AV_LOG_ERROR,
3628                "B picture before any references, skipping\n");
3629         return -1;
3630     }
3631
3632     pps_id= get_ue_golomb(&s->gb);
3633     if(pps_id>=MAX_PPS_COUNT){
3634         av_log(h->s.avctx, AV_LOG_ERROR, "pps_id out of range\n");
3635         return -1;
3636     }
3637     if(!h0->pps_buffers[pps_id]) {
3638         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing PPS referenced\n");
3639         return -1;
3640     }
3641     h->pps= *h0->pps_buffers[pps_id];
3642
3643     if(!h0->sps_buffers[h->pps.sps_id]) {
3644         av_log(h->s.avctx, AV_LOG_ERROR, "non-existing SPS referenced\n");
3645         return -1;
3646     }
3647     h->sps = *h0->sps_buffers[h->pps.sps_id];
3648
3649     if(h == h0 && h->dequant_coeff_pps != pps_id){
3650         h->dequant_coeff_pps = pps_id;
3651         init_dequant_tables(h);
3652     }
3653
3654     s->mb_width= h->sps.mb_width;
3655     s->mb_height= h->sps.mb_height * (2 - h->sps.frame_mbs_only_flag);
3656
3657     h->b_stride=  s->mb_width*4;
3658     h->b8_stride= s->mb_width*2;
3659
3660     s->width = 16*s->mb_width - 2*FFMIN(h->sps.crop_right, 7);
3661     if(h->sps.frame_mbs_only_flag)
3662         s->height= 16*s->mb_height - 2*FFMIN(h->sps.crop_bottom, 7);
3663     else
3664         s->height= 16*s->mb_height - 4*FFMIN(h->sps.crop_bottom, 3);
3665
3666     if (s->context_initialized
3667         && (   s->width != s->avctx->width || s->height != s->avctx->height)) {
3668         if(h != h0)
3669             return -1;   // width / height changed during parallelized decoding
3670         free_tables(h);
3671         flush_dpb(s->avctx);
3672         MPV_common_end(s);
3673     }
3674     if (!s->context_initialized) {
3675         if(h != h0)
3676             return -1;  // we cant (re-)initialize context during parallel decoding
3677         if (MPV_common_init(s) < 0)
3678             return -1;
3679         s->first_field = 0;
3680
3681         init_scan_tables(h);
3682         alloc_tables(h);
3683
3684         for(i = 1; i < s->avctx->thread_count; i++) {
3685             H264Context *c;
3686             c = h->thread_context[i] = av_malloc(sizeof(H264Context));
3687             memcpy(c, h->s.thread_context[i], sizeof(MpegEncContext));
3688             memset(&c->s + 1, 0, sizeof(H264Context) - sizeof(MpegEncContext));
3689             c->sps = h->sps;
3690             c->pps = h->pps;
3691             init_scan_tables(c);
3692             clone_tables(c, h);
3693         }
3694
3695         for(i = 0; i < s->avctx->thread_count; i++)
3696             if(context_init(h->thread_context[i]) < 0)
3697                 return -1;
3698
3699         s->avctx->width = s->width;
3700         s->avctx->height = s->height;
3701         s->avctx->sample_aspect_ratio= h->sps.sar;
3702         if(!s->avctx->sample_aspect_ratio.den)
3703             s->avctx->sample_aspect_ratio.den = 1;
3704
3705         if(h->sps.timing_info_present_flag){
3706             s->avctx->time_base= (AVRational){h->sps.num_units_in_tick * 2, h->sps.time_scale};
3707             if(h->x264_build > 0 && h->x264_build < 44)
3708                 s->avctx->time_base.den *= 2;
3709             av_reduce(&s->avctx->time_base.num, &s->avctx->time_base.den,
3710                       s->avctx->time_base.num, s->avctx->time_base.den, 1<<30);
3711         }
3712     }
3713
3714     h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
3715
3716     h->mb_mbaff = 0;
3717     h->mb_aff_frame = 0;
3718     last_pic_structure = s0->picture_structure;
3719     if(h->sps.frame_mbs_only_flag){
3720         s->picture_structure= PICT_FRAME;
3721     }else{
3722         if(get_bits1(&s->gb)) { //field_pic_flag
3723             s->picture_structure= PICT_TOP_FIELD + get_bits1(&s->gb); //bottom_field_flag
3724         } else {
3725             s->picture_structure= PICT_FRAME;
3726             h->mb_aff_frame = h->sps.mb_aff;
3727         }
3728     }
3729     h->mb_field_decoding_flag= s->picture_structure != PICT_FRAME;
3730
3731     if(h0->current_slice == 0){
3732         while(h->frame_num !=  h->prev_frame_num &&
3733               h->frame_num != (h->prev_frame_num+1)%(1<<h->sps.log2_max_frame_num)){
3734             av_log(NULL, AV_LOG_DEBUG, "Frame num gap %d %d\n", h->frame_num, h->prev_frame_num);
3735             frame_start(h);
3736             h->prev_frame_num++;
3737             h->prev_frame_num %= 1<<h->sps.log2_max_frame_num;
3738             s->current_picture_ptr->frame_num= h->prev_frame_num;
3739             execute_ref_pic_marking(h, NULL, 0);
3740         }
3741
3742         /* See if we have a decoded first field looking for a pair... */
3743         if (s0->first_field) {
3744             assert(s0->current_picture_ptr);
3745             assert(s0->current_picture_ptr->data[0]);
3746             assert(s0->current_picture_ptr->reference != DELAYED_PIC_REF);
3747
3748             /* figure out if we have a complementary field pair */
3749             if (!FIELD_PICTURE || s->picture_structure == last_pic_structure) {
3750                 /*
3751                  * Previous field is unmatched. Don't display it, but let it
3752                  * remain for reference if marked as such.
3753                  */
3754                 s0->current_picture_ptr = NULL;
3755                 s0->first_field = FIELD_PICTURE;
3756
3757             } else {
3758                 if (h->nal_ref_idc &&
3759                         s0->current_picture_ptr->reference &&
3760                         s0->current_picture_ptr->frame_num != h->frame_num) {
3761                     /*
3762                      * This and previous field were reference, but had
3763                      * different frame_nums. Consider this field first in
3764                      * pair. Throw away previous field except for reference
3765                      * purposes.
3766                      */
3767                     s0->first_field = 1;
3768                     s0->current_picture_ptr = NULL;
3769
3770                 } else {
3771                     /* Second field in complementary pair */
3772                     s0->first_field = 0;
3773                 }
3774             }
3775
3776         } else {
3777             /* Frame or first field in a potentially complementary pair */
3778             assert(!s0->current_picture_ptr);
3779             s0->first_field = FIELD_PICTURE;
3780         }
3781
3782         if((!FIELD_PICTURE || s0->first_field) && frame_start(h) < 0) {
3783             s0->first_field = 0;
3784             return -1;
3785         }
3786     }
3787     if(h != h0)
3788         clone_slice(h, h0);
3789
3790     s->current_picture_ptr->frame_num= h->frame_num; //FIXME frame_num cleanup
3791
3792     assert(s->mb_num == s->mb_width * s->mb_height);
3793     if(first_mb_in_slice << FIELD_OR_MBAFF_PICTURE >= s->mb_num ||
3794        first_mb_in_slice                    >= s->mb_num){
3795         av_log(h->s.avctx, AV_LOG_ERROR, "first_mb_in_slice overflow\n");
3796         return -1;
3797     }
3798     s->resync_mb_x = s->mb_x = first_mb_in_slice % s->mb_width;
3799     s->resync_mb_y = s->mb_y = (first_mb_in_slice / s->mb_width) << FIELD_OR_MBAFF_PICTURE;
3800     if (s->picture_structure == PICT_BOTTOM_FIELD)
3801         s->resync_mb_y = s->mb_y = s->mb_y + 1;
3802     assert(s->mb_y < s->mb_height);
3803
3804     if(s->picture_structure==PICT_FRAME){
3805         h->curr_pic_num=   h->frame_num;
3806         h->max_pic_num= 1<< h->sps.log2_max_frame_num;
3807     }else{
3808         h->curr_pic_num= 2*h->frame_num + 1;
3809         h->max_pic_num= 1<<(h->sps.log2_max_frame_num + 1);
3810     }
3811
3812     if(h->nal_unit_type == NAL_IDR_SLICE){
3813         get_ue_golomb(&s->gb); /* idr_pic_id */
3814     }
3815
3816     if(h->sps.poc_type==0){
3817         h->poc_lsb= get_bits(&s->gb, h->sps.log2_max_poc_lsb);
3818
3819         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME){
3820             h->delta_poc_bottom= get_se_golomb(&s->gb);
3821         }
3822     }
3823
3824     if(h->sps.poc_type==1 && !h->sps.delta_pic_order_always_zero_flag){
3825         h->delta_poc[0]= get_se_golomb(&s->gb);
3826
3827         if(h->pps.pic_order_present==1 && s->picture_structure==PICT_FRAME)
3828             h->delta_poc[1]= get_se_golomb(&s->gb);
3829     }
3830
3831     init_poc(h);
3832
3833     if(h->pps.redundant_pic_cnt_present){
3834         h->redundant_pic_count= get_ue_golomb(&s->gb);
3835     }
3836
3837     //set defaults, might be overridden a few lines later
3838     h->ref_count[0]= h->pps.ref_count[0];
3839     h->ref_count[1]= h->pps.ref_count[1];
3840
3841     if(h->slice_type_nos != FF_I_TYPE){
3842         if(h->slice_type_nos == FF_B_TYPE){
3843             h->direct_spatial_mv_pred= get_bits1(&s->gb);
3844         }
3845         num_ref_idx_active_override_flag= get_bits1(&s->gb);
3846
3847         if(num_ref_idx_active_override_flag){
3848             h->ref_count[0]= get_ue_golomb(&s->gb) + 1;
3849             if(h->slice_type_nos==FF_B_TYPE)
3850                 h->ref_count[1]= get_ue_golomb(&s->gb) + 1;
3851
3852             if(h->ref_count[0]-1 > 32-1 || h->ref_count[1]-1 > 32-1){
3853                 av_log(h->s.avctx, AV_LOG_ERROR, "reference overflow\n");
3854                 h->ref_count[0]= h->ref_count[1]= 1;
3855                 return -1;
3856             }
3857         }
3858         if(h->slice_type_nos == FF_B_TYPE)
3859             h->list_count= 2;
3860         else
3861             h->list_count= 1;
3862     }else
3863         h->list_count= 0;
3864
3865     if(!default_ref_list_done){
3866         fill_default_ref_list(h);
3867     }
3868
3869     if(h->slice_type_nos!=FF_I_TYPE && decode_ref_pic_list_reordering(h) < 0)
3870         return -1;
3871
3872     if(h->slice_type_nos!=FF_I_TYPE){
3873         s->last_picture_ptr= &h->ref_list[0][0];
3874         ff_copy_picture(&s->last_picture, s->last_picture_ptr);
3875     }
3876     if(h->slice_type_nos==FF_B_TYPE){
3877         s->next_picture_ptr= &h->ref_list[1][0];
3878         ff_copy_picture(&s->next_picture, s->next_picture_ptr);
3879     }
3880
3881     if(   (h->pps.weighted_pred          && h->slice_type_nos == FF_P_TYPE )
3882        ||  (h->pps.weighted_bipred_idc==1 && h->slice_type_nos== FF_B_TYPE ) )
3883         pred_weight_table(h);
3884     else if(h->pps.weighted_bipred_idc==2 && h->slice_type_nos== FF_B_TYPE)
3885         implicit_weight_table(h);
3886     else
3887         h->use_weight = 0;
3888
3889     if(h->nal_ref_idc)
3890         decode_ref_pic_marking(h0, &s->gb);
3891
3892     if(FRAME_MBAFF)
3893         fill_mbaff_ref_list(h);
3894
3895     if(h->slice_type_nos==FF_B_TYPE && !h->direct_spatial_mv_pred)
3896         direct_dist_scale_factor(h);
3897     direct_ref_list_init(h);
3898
3899     if( h->slice_type_nos != FF_I_TYPE && h->pps.cabac ){
3900         tmp = get_ue_golomb(&s->gb);
3901         if(tmp > 2){
3902             av_log(s->avctx, AV_LOG_ERROR, "cabac_init_idc overflow\n");
3903             return -1;
3904         }
3905         h->cabac_init_idc= tmp;
3906     }
3907
3908     h->last_qscale_diff = 0;
3909     tmp = h->pps.init_qp + get_se_golomb(&s->gb);
3910     if(tmp>51){
3911         av_log(s->avctx, AV_LOG_ERROR, "QP %u out of range\n", tmp);
3912         return -1;
3913     }
3914     s->qscale= tmp;
3915     h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
3916     h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
3917     //FIXME qscale / qp ... stuff
3918     if(h->slice_type == FF_SP_TYPE){
3919         get_bits1(&s->gb); /* sp_for_switch_flag */
3920     }
3921     if(h->slice_type==FF_SP_TYPE || h->slice_type == FF_SI_TYPE){
3922         get_se_golomb(&s->gb); /* slice_qs_delta */
3923     }
3924
3925     h->deblocking_filter = 1;
3926     h->slice_alpha_c0_offset = 0;
3927     h->slice_beta_offset = 0;
3928     if( h->pps.deblocking_filter_parameters_present ) {
3929         tmp= get_ue_golomb(&s->gb);
3930         if(tmp > 2){
3931             av_log(s->avctx, AV_LOG_ERROR, "deblocking_filter_idc %u out of range\n", tmp);
3932             return -1;
3933         }
3934         h->deblocking_filter= tmp;
3935         if(h->deblocking_filter < 2)
3936             h->deblocking_filter^= 1; // 1<->0
3937
3938         if( h->deblocking_filter ) {
3939             h->slice_alpha_c0_offset = get_se_golomb(&s->gb) << 1;
3940             h->slice_beta_offset = get_se_golomb(&s->gb) << 1;
3941         }
3942     }
3943
3944     if(   s->avctx->skip_loop_filter >= AVDISCARD_ALL
3945        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY && h->slice_type_nos != FF_I_TYPE)
3946        ||(s->avctx->skip_loop_filter >= AVDISCARD_BIDIR  && h->slice_type_nos == FF_B_TYPE)
3947        ||(s->avctx->skip_loop_filter >= AVDISCARD_NONREF && h->nal_ref_idc == 0))
3948         h->deblocking_filter= 0;
3949
3950     if(h->deblocking_filter == 1 && h0->max_contexts > 1) {
3951         if(s->avctx->flags2 & CODEC_FLAG2_FAST) {
3952             /* Cheat slightly for speed:
3953                Do not bother to deblock across slices. */
3954             h->deblocking_filter = 2;
3955         } else {
3956             h0->max_contexts = 1;
3957             if(!h0->single_decode_warning) {
3958                 av_log(s->avctx, AV_LOG_INFO, "Cannot parallelize deblocking type 1, decoding such frames in sequential order\n");
3959                 h0->single_decode_warning = 1;
3960             }
3961             if(h != h0)
3962                 return 1; // deblocking switched inside frame
3963         }
3964     }
3965
3966 #if 0 //FMO
3967     if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
3968         slice_group_change_cycle= get_bits(&s->gb, ?);
3969 #endif
3970
3971     h0->last_slice_type = slice_type;
3972     h->slice_num = ++h0->current_slice;
3973     if(h->slice_num >= MAX_SLICES){
3974         av_log(s->avctx, AV_LOG_ERROR, "Too many slices, increase MAX_SLICES and recompile\n");
3975     }
3976
3977     for(j=0; j<2; j++){
3978         int *ref2frm= h->ref2frm[h->slice_num&(MAX_SLICES-1)][j];
3979         ref2frm[0]=
3980         ref2frm[1]= -1;
3981         for(i=0; i<16; i++)
3982             ref2frm[i+2]= 4*h->ref_list[j][i].frame_num
3983                           +(h->ref_list[j][i].reference&3);
3984         ref2frm[18+0]=
3985         ref2frm[18+1]= -1;
3986         for(i=16; i<48; i++)
3987             ref2frm[i+4]= 4*h->ref_list[j][i].frame_num
3988                           +(h->ref_list[j][i].reference&3);
3989     }
3990
3991     h->emu_edge_width= (s->flags&CODEC_FLAG_EMU_EDGE) ? 0 : 16;
3992     h->emu_edge_height= (FRAME_MBAFF || FIELD_PICTURE) ? 0 : h->emu_edge_width;
3993
3994     if(s->avctx->debug&FF_DEBUG_PICT_INFO){
3995         av_log(h->s.avctx, AV_LOG_DEBUG, "slice:%d %s mb:%d %c%s%s pps:%u frame:%d poc:%d/%d ref:%d/%d qp:%d loop:%d:%d:%d weight:%d%s %s\n",
3996                h->slice_num,
3997                (s->picture_structure==PICT_FRAME ? "F" : s->picture_structure==PICT_TOP_FIELD ? "T" : "B"),
3998                first_mb_in_slice,
3999                av_get_pict_type_char(h->slice_type), h->slice_type_fixed ? " fix" : "", h->nal_unit_type == NAL_IDR_SLICE ? " IDR" : "",
4000                pps_id, h->frame_num,
4001                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
4002                h->ref_count[0], h->ref_count[1],
4003                s->qscale,
4004                h->deblocking_filter, h->slice_alpha_c0_offset/2, h->slice_beta_offset/2,
4005                h->use_weight,
4006                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
4007                h->slice_type == FF_B_TYPE ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""
4008                );
4009     }
4010
4011     return 0;
4012 }
4013
4014 /**
4015  *
4016  */
4017 static inline int get_level_prefix(GetBitContext *gb){
4018     unsigned int buf;
4019     int log;
4020
4021     OPEN_READER(re, gb);
4022     UPDATE_CACHE(re, gb);
4023     buf=GET_CACHE(re, gb);
4024
4025     log= 32 - av_log2(buf);
4026 #ifdef TRACE
4027     print_bin(buf>>(32-log), log);
4028     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__);
4029 #endif
4030
4031     LAST_SKIP_BITS(re, gb, log);
4032     CLOSE_READER(re, gb);
4033
4034     return log-1;