h264_direct.c
Go to the documentation of this file.
1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... direct mb/block decoding
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
24  * H.264 / AVC / MPEG4 part10 direct mb/block decoding.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #include "internal.h"
29 #include "avcodec.h"
30 #include "mpegvideo.h"
31 #include "h264.h"
32 #include "rectangle.h"
33 #include "thread.h"
34 
35 //#undef NDEBUG
36 #include <assert.h>
37 
38 
39 static int get_scale_factor(H264Context * const h, int poc, int poc1, int i){
40  int poc0 = h->ref_list[0][i].poc;
41  int td = av_clip(poc1 - poc0, -128, 127);
42  if(td == 0 || h->ref_list[0][i].long_ref){
43  return 256;
44  }else{
45  int tb = av_clip(poc - poc0, -128, 127);
46  int tx = (16384 + (FFABS(td) >> 1)) / td;
47  return av_clip((tb*tx + 32) >> 6, -1024, 1023);
48  }
49 }
50 
51 void ff_h264_direct_dist_scale_factor(H264Context * const h){
52  const int poc = h->cur_pic_ptr->field_poc[h->picture_structure == PICT_BOTTOM_FIELD];
53  const int poc1 = h->ref_list[1][0].poc;
54  int i, field;
55 
56  if (FRAME_MBAFF(h))
57  for (field = 0; field < 2; field++){
58  const int poc = h->cur_pic_ptr->field_poc[field];
59  const int poc1 = h->ref_list[1][0].field_poc[field];
60  for (i = 0; i < 2 * h->ref_count[0]; i++)
61  h->dist_scale_factor_field[field][i^field] =
62  get_scale_factor(h, poc, poc1, i+16);
63  }
64 
65  for (i = 0; i < h->ref_count[0]; i++){
66  h->dist_scale_factor[i] = get_scale_factor(h, poc, poc1, i);
67  }
68 }
69 
70 static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi){
71  Picture * const ref1 = &h->ref_list[1][0];
72  int j, old_ref, rfield;
73  int start= mbafi ? 16 : 0;
74  int end = mbafi ? 16+2*h->ref_count[0] : h->ref_count[0];
75  int interl= mbafi || h->picture_structure != PICT_FRAME;
76 
77  /* bogus; fills in for missing frames */
78  memset(map[list], 0, sizeof(map[list]));
79 
80  for(rfield=0; rfield<2; rfield++){
81  for(old_ref=0; old_ref<ref1->ref_count[colfield][list]; old_ref++){
82  int poc = ref1->ref_poc[colfield][list][old_ref];
83 
84  if (!interl)
85  poc |= 3;
86  else if( interl && (poc&3) == 3) // FIXME: store all MBAFF references so this is not needed
87  poc= (poc&~3) + rfield + 1;
88 
89  for(j=start; j<end; j++){
90  if (4 * h->ref_list[0][j].frame_num + (h->ref_list[0][j].reference & 3) == poc) {
91  int cur_ref= mbafi ? (j-16)^field : j;
92  if (ref1->mbaff)
93  map[list][2 * old_ref + (rfield^field) + 16] = cur_ref;
94  if(rfield == field || !interl)
95  map[list][old_ref] = cur_ref;
96  break;
97  }
98  }
99  }
100  }
101 }
102 
103 void ff_h264_direct_ref_list_init(H264Context * const h){
104  Picture * const ref1 = &h->ref_list[1][0];
105  Picture * const cur = h->cur_pic_ptr;
106  int list, j, field;
107  int sidx= (h->picture_structure&1)^1;
108  int ref1sidx = (ref1->reference&1)^1;
109 
110  for(list=0; list<2; list++){
111  cur->ref_count[sidx][list] = h->ref_count[list];
112  for(j=0; j<h->ref_count[list]; j++)
113  cur->ref_poc[sidx][list][j] = 4 * h->ref_list[list][j].frame_num + (h->ref_list[list][j].reference & 3);
114  }
115 
116  if(h->picture_structure == PICT_FRAME){
117  memcpy(cur->ref_count[1], cur->ref_count[0], sizeof(cur->ref_count[0]));
118  memcpy(cur->ref_poc [1], cur->ref_poc [0], sizeof(cur->ref_poc [0]));
119  }
120 
121  cur->mbaff = FRAME_MBAFF(h);
122 
123  h->col_fieldoff= 0;
124  if(h->picture_structure == PICT_FRAME){
125  int cur_poc = h->cur_pic_ptr->poc;
126  int *col_poc = h->ref_list[1]->field_poc;
127  h->col_parity= (FFABS(col_poc[0] - cur_poc) >= FFABS(col_poc[1] - cur_poc));
128  ref1sidx=sidx= h->col_parity;
129  } else if (!(h->picture_structure & h->ref_list[1][0].reference) && !h->ref_list[1][0].mbaff) { // FL -> FL & differ parity
130  h->col_fieldoff = 2 * h->ref_list[1][0].reference - 3;
131  }
132 
133  if (h->slice_type_nos != AV_PICTURE_TYPE_B || h->direct_spatial_mv_pred)
134  return;
135 
136  for(list=0; list<2; list++){
137  fill_colmap(h, h->map_col_to_list0, list, sidx, ref1sidx, 0);
138  if (FRAME_MBAFF(h))
139  for(field=0; field<2; field++)
140  fill_colmap(h, h->map_col_to_list0_field[field], list, field, field, 1);
141  }
142 }
143 
144 static void await_reference_mb_row(H264Context * const h, Picture *ref, int mb_y)
145 {
146  int ref_field = ref->reference - 1;
147  int ref_field_picture = ref->field_picture;
148  int ref_height = 16*h->mb_height >> ref_field_picture;
149 
150  if(!HAVE_THREADS || !(h->avctx->active_thread_type&FF_THREAD_FRAME))
151  return;
152 
153  //FIXME it can be safe to access mb stuff
154  //even if pixels aren't deblocked yet
155 
156  ff_thread_await_progress(&ref->tf,
157  FFMIN(16 * mb_y >> ref_field_picture, ref_height - 1),
158  ref_field_picture && ref_field);
159 }
160 
161 static void pred_spatial_direct_motion(H264Context * const h, int *mb_type){
162  int b8_stride = 2;
163  int b4_stride = h->b_stride;
164  int mb_xy = h->mb_xy, mb_y = h->mb_y;
165  int mb_type_col[2];
166  const int16_t (*l1mv0)[2], (*l1mv1)[2];
167  const int8_t *l1ref0, *l1ref1;
168  const int is_b8x8 = IS_8X8(*mb_type);
169  unsigned int sub_mb_type= MB_TYPE_L0L1;
170  int i8, i4;
171  int ref[2];
172  int mv[2];
173  int list;
174 
175  assert(h->ref_list[1][0].reference & 3);
176 
177  await_reference_mb_row(h, &h->ref_list[1][0], h->mb_y + !!IS_INTERLACED(*mb_type));
178 
179 #define MB_TYPE_16x16_OR_INTRA (MB_TYPE_16x16|MB_TYPE_INTRA4x4|MB_TYPE_INTRA16x16|MB_TYPE_INTRA_PCM)
180 
181 
182  /* ref = min(neighbors) */
183  for(list=0; list<2; list++){
184  int left_ref = h->ref_cache[list][scan8[0] - 1];
185  int top_ref = h->ref_cache[list][scan8[0] - 8];
186  int refc = h->ref_cache[list][scan8[0] - 8 + 4];
187  const int16_t *C= h->mv_cache[list][ scan8[0] - 8 + 4];
188  if(refc == PART_NOT_AVAILABLE){
189  refc = h->ref_cache[list][scan8[0] - 8 - 1];
190  C = h-> mv_cache[list][scan8[0] - 8 - 1];
191  }
192  ref[list] = FFMIN3((unsigned)left_ref, (unsigned)top_ref, (unsigned)refc);
193  if(ref[list] >= 0){
194  //this is just pred_motion() but with the cases removed that cannot happen for direct blocks
195  const int16_t * const A= h->mv_cache[list][ scan8[0] - 1 ];
196  const int16_t * const B= h->mv_cache[list][ scan8[0] - 8 ];
197 
198  int match_count= (left_ref==ref[list]) + (top_ref==ref[list]) + (refc==ref[list]);
199  if(match_count > 1){ //most common
200  mv[list]= pack16to32(mid_pred(A[0], B[0], C[0]),
201  mid_pred(A[1], B[1], C[1]) );
202  }else {
203  assert(match_count==1);
204  if(left_ref==ref[list]){
205  mv[list]= AV_RN32A(A);
206  }else if(top_ref==ref[list]){
207  mv[list]= AV_RN32A(B);
208  }else{
209  mv[list]= AV_RN32A(C);
210  }
211  }
212  av_assert2(ref[list] < (h->ref_count[list] << !!FRAME_MBAFF(h)));
213  }else{
214  int mask= ~(MB_TYPE_L0 << (2*list));
215  mv[list] = 0;
216  ref[list] = -1;
217  if(!is_b8x8)
218  *mb_type &= mask;
219  sub_mb_type &= mask;
220  }
221  }
222  if(ref[0] < 0 && ref[1] < 0){
223  ref[0] = ref[1] = 0;
224  if(!is_b8x8)
225  *mb_type |= MB_TYPE_L0L1;
226  sub_mb_type |= MB_TYPE_L0L1;
227  }
228 
229  if(!(is_b8x8|mv[0]|mv[1])){
230  fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
231  fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
232  fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, 0, 4);
233  fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, 0, 4);
234  *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
235  return;
236  }
237 
238  if (IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])) { // AFL/AFR/FR/FL -> AFL/FL
239  if (!IS_INTERLACED(*mb_type)) { // AFR/FR -> AFL/FL
240  mb_y = (h->mb_y&~1) + h->col_parity;
241  mb_xy= h->mb_x + ((h->mb_y&~1) + h->col_parity)*h->mb_stride;
242  b8_stride = 0;
243  }else{
244  mb_y += h->col_fieldoff;
245  mb_xy += h->mb_stride*h->col_fieldoff; // non zero for FL -> FL & differ parity
246  }
247  goto single_col;
248  }else{ // AFL/AFR/FR/FL -> AFR/FR
249  if(IS_INTERLACED(*mb_type)){ // AFL /FL -> AFR/FR
250  mb_y = h->mb_y&~1;
251  mb_xy= h->mb_x + (h->mb_y&~1)*h->mb_stride;
252  mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
253  mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + h->mb_stride];
254  b8_stride = 2+4*h->mb_stride;
255  b4_stride *= 6;
256  if (IS_INTERLACED(mb_type_col[0]) != IS_INTERLACED(mb_type_col[1])) {
257  mb_type_col[0] &= ~MB_TYPE_INTERLACED;
258  mb_type_col[1] &= ~MB_TYPE_INTERLACED;
259  }
260 
261  sub_mb_type |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
262  if( (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
263  && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
264  && !is_b8x8){
265  *mb_type |= MB_TYPE_16x8 |MB_TYPE_DIRECT2; /* B_16x8 */
266  }else{
267  *mb_type |= MB_TYPE_8x8;
268  }
269  }else{ // AFR/FR -> AFR/FR
270 single_col:
271  mb_type_col[0] =
272  mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
273 
274  sub_mb_type |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
275  if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
276  *mb_type |= MB_TYPE_16x16|MB_TYPE_DIRECT2; /* B_16x16 */
277  }else if(!is_b8x8 && (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16))){
278  *mb_type |= MB_TYPE_DIRECT2 | (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16));
279  }else{
280  if(!h->sps.direct_8x8_inference_flag){
281  /* FIXME save sub mb types from previous frames (or derive from MVs)
282  * so we know exactly what block size to use */
283  sub_mb_type += (MB_TYPE_8x8-MB_TYPE_16x16); /* B_SUB_4x4 */
284  }
285  *mb_type |= MB_TYPE_8x8;
286  }
287  }
288  }
289 
290  await_reference_mb_row(h, &h->ref_list[1][0], mb_y);
291 
292  l1mv0 = (void*)&h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
293  l1mv1 = (void*)&h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
294  l1ref0 = &h->ref_list[1][0].ref_index [0][4 * mb_xy];
295  l1ref1 = &h->ref_list[1][0].ref_index [1][4 * mb_xy];
296  if(!b8_stride){
297  if(h->mb_y&1){
298  l1ref0 += 2;
299  l1ref1 += 2;
300  l1mv0 += 2*b4_stride;
301  l1mv1 += 2*b4_stride;
302  }
303  }
304 
305 
306  if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
307  int n=0;
308  for(i8=0; i8<4; i8++){
309  int x8 = i8&1;
310  int y8 = i8>>1;
311  int xy8 = x8+y8*b8_stride;
312  int xy4 = 3*x8+y8*b4_stride;
313  int a,b;
314 
315  if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
316  continue;
317  h->sub_mb_type[i8] = sub_mb_type;
318 
319  fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
320  fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
321  if(!IS_INTRA(mb_type_col[y8]) && !h->ref_list[1][0].long_ref
322  && ( (l1ref0[xy8] == 0 && FFABS(l1mv0[xy4][0]) <= 1 && FFABS(l1mv0[xy4][1]) <= 1)
323  || (l1ref0[xy8] < 0 && l1ref1[xy8] == 0 && FFABS(l1mv1[xy4][0]) <= 1 && FFABS(l1mv1[xy4][1]) <= 1))){
324  a=b=0;
325  if(ref[0] > 0)
326  a= mv[0];
327  if(ref[1] > 0)
328  b= mv[1];
329  n++;
330  }else{
331  a= mv[0];
332  b= mv[1];
333  }
334  fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, a, 4);
335  fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, b, 4);
336  }
337  if(!is_b8x8 && !(n&3))
338  *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
339  }else if(IS_16X16(*mb_type)){
340  int a,b;
341 
342  fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
343  fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
344  if(!IS_INTRA(mb_type_col[0]) && !h->ref_list[1][0].long_ref
345  && ( (l1ref0[0] == 0 && FFABS(l1mv0[0][0]) <= 1 && FFABS(l1mv0[0][1]) <= 1)
346  || (l1ref0[0] < 0 && l1ref1[0] == 0 && FFABS(l1mv1[0][0]) <= 1 && FFABS(l1mv1[0][1]) <= 1
347  && h->x264_build>33U))){
348  a=b=0;
349  if(ref[0] > 0)
350  a= mv[0];
351  if(ref[1] > 0)
352  b= mv[1];
353  }else{
354  a= mv[0];
355  b= mv[1];
356  }
357  fill_rectangle(&h->mv_cache[0][scan8[0]], 4, 4, 8, a, 4);
358  fill_rectangle(&h->mv_cache[1][scan8[0]], 4, 4, 8, b, 4);
359  }else{
360  int n=0;
361  for(i8=0; i8<4; i8++){
362  const int x8 = i8&1;
363  const int y8 = i8>>1;
364 
365  if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
366  continue;
367  h->sub_mb_type[i8] = sub_mb_type;
368 
369  fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, mv[0], 4);
370  fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, mv[1], 4);
371  fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
372  fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[1], 1);
373 
374  assert(b8_stride==2);
375  /* col_zero_flag */
376  if(!IS_INTRA(mb_type_col[0]) && !h->ref_list[1][0].long_ref && ( l1ref0[i8] == 0
377  || (l1ref0[i8] < 0 && l1ref1[i8] == 0
378  && h->x264_build>33U))){
379  const int16_t (*l1mv)[2]= l1ref0[i8] == 0 ? l1mv0 : l1mv1;
380  if(IS_SUB_8X8(sub_mb_type)){
381  const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
382  if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
383  if(ref[0] == 0)
384  fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
385  if(ref[1] == 0)
386  fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
387  n+=4;
388  }
389  }else{
390  int m=0;
391  for(i4=0; i4<4; i4++){
392  const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
393  if(FFABS(mv_col[0]) <= 1 && FFABS(mv_col[1]) <= 1){
394  if(ref[0] == 0)
395  AV_ZERO32(h->mv_cache[0][scan8[i8*4+i4]]);
396  if(ref[1] == 0)
397  AV_ZERO32(h->mv_cache[1][scan8[i8*4+i4]]);
398  m++;
399  }
400  }
401  if(!(m&3))
402  h->sub_mb_type[i8]+= MB_TYPE_16x16 - MB_TYPE_8x8;
403  n+=m;
404  }
405  }
406  }
407  if(!is_b8x8 && !(n&15))
408  *mb_type= (*mb_type & ~(MB_TYPE_8x8|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_P1L0|MB_TYPE_P1L1))|MB_TYPE_16x16|MB_TYPE_DIRECT2;
409  }
410 }
411 
412 static void pred_temp_direct_motion(H264Context * const h, int *mb_type){
413  int b8_stride = 2;
414  int b4_stride = h->b_stride;
415  int mb_xy = h->mb_xy, mb_y = h->mb_y;
416  int mb_type_col[2];
417  const int16_t (*l1mv0)[2], (*l1mv1)[2];
418  const int8_t *l1ref0, *l1ref1;
419  const int is_b8x8 = IS_8X8(*mb_type);
420  unsigned int sub_mb_type;
421  int i8, i4;
422 
423  assert(h->ref_list[1][0].reference & 3);
424 
425  await_reference_mb_row(h, &h->ref_list[1][0], h->mb_y + !!IS_INTERLACED(*mb_type));
426 
427  if (IS_INTERLACED(h->ref_list[1][0].mb_type[mb_xy])) { // AFL/AFR/FR/FL -> AFL/FL
428  if (!IS_INTERLACED(*mb_type)) { // AFR/FR -> AFL/FL
429  mb_y = (h->mb_y&~1) + h->col_parity;
430  mb_xy= h->mb_x + ((h->mb_y&~1) + h->col_parity)*h->mb_stride;
431  b8_stride = 0;
432  }else{
433  mb_y += h->col_fieldoff;
434  mb_xy += h->mb_stride*h->col_fieldoff; // non zero for FL -> FL & differ parity
435  }
436  goto single_col;
437  }else{ // AFL/AFR/FR/FL -> AFR/FR
438  if(IS_INTERLACED(*mb_type)){ // AFL /FL -> AFR/FR
439  mb_y = h->mb_y&~1;
440  mb_xy= h->mb_x + (h->mb_y&~1)*h->mb_stride;
441  mb_type_col[0] = h->ref_list[1][0].mb_type[mb_xy];
442  mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy + h->mb_stride];
443  b8_stride = 2+4*h->mb_stride;
444  b4_stride *= 6;
445  if (IS_INTERLACED(mb_type_col[0]) != IS_INTERLACED(mb_type_col[1])) {
446  mb_type_col[0] &= ~MB_TYPE_INTERLACED;
447  mb_type_col[1] &= ~MB_TYPE_INTERLACED;
448  }
449 
450  sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
451 
452  if( (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)
453  && (mb_type_col[1] & MB_TYPE_16x16_OR_INTRA)
454  && !is_b8x8){
455  *mb_type |= MB_TYPE_16x8 |MB_TYPE_L0L1|MB_TYPE_DIRECT2; /* B_16x8 */
456  }else{
457  *mb_type |= MB_TYPE_8x8|MB_TYPE_L0L1;
458  }
459  }else{ // AFR/FR -> AFR/FR
460 single_col:
461  mb_type_col[0] =
462  mb_type_col[1] = h->ref_list[1][0].mb_type[mb_xy];
463 
464  sub_mb_type = MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_8x8 */
465  if(!is_b8x8 && (mb_type_col[0] & MB_TYPE_16x16_OR_INTRA)){
466  *mb_type |= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_16x16 */
467  }else if(!is_b8x8 && (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16))){
468  *mb_type |= MB_TYPE_L0L1|MB_TYPE_DIRECT2 | (mb_type_col[0] & (MB_TYPE_16x8|MB_TYPE_8x16));
469  }else{
470  if(!h->sps.direct_8x8_inference_flag){
471  /* FIXME save sub mb types from previous frames (or derive from MVs)
472  * so we know exactly what block size to use */
473  sub_mb_type = MB_TYPE_8x8|MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2; /* B_SUB_4x4 */
474  }
475  *mb_type |= MB_TYPE_8x8|MB_TYPE_L0L1;
476  }
477  }
478  }
479 
480  await_reference_mb_row(h, &h->ref_list[1][0], mb_y);
481 
482  l1mv0 = (void*)&h->ref_list[1][0].motion_val[0][h->mb2b_xy [mb_xy]];
483  l1mv1 = (void*)&h->ref_list[1][0].motion_val[1][h->mb2b_xy [mb_xy]];
484  l1ref0 = &h->ref_list[1][0].ref_index [0][4 * mb_xy];
485  l1ref1 = &h->ref_list[1][0].ref_index [1][4 * mb_xy];
486  if(!b8_stride){
487  if(h->mb_y&1){
488  l1ref0 += 2;
489  l1ref1 += 2;
490  l1mv0 += 2*b4_stride;
491  l1mv1 += 2*b4_stride;
492  }
493  }
494 
495  {
496  const int *map_col_to_list0[2] = {h->map_col_to_list0[0], h->map_col_to_list0[1]};
497  const int *dist_scale_factor = h->dist_scale_factor;
498  int ref_offset;
499 
500  if (FRAME_MBAFF(h) && IS_INTERLACED(*mb_type)) {
501  map_col_to_list0[0] = h->map_col_to_list0_field[h->mb_y&1][0];
502  map_col_to_list0[1] = h->map_col_to_list0_field[h->mb_y&1][1];
503  dist_scale_factor =h->dist_scale_factor_field[h->mb_y&1];
504  }
505  ref_offset = (h->ref_list[1][0].mbaff<<4) & (mb_type_col[0]>>3); //if(h->ref_list[1][0].mbaff && IS_INTERLACED(mb_type_col[0])) ref_offset=16 else 0
506 
507  if(IS_INTERLACED(*mb_type) != IS_INTERLACED(mb_type_col[0])){
508  int y_shift = 2*!IS_INTERLACED(*mb_type);
509  assert(h->sps.direct_8x8_inference_flag);
510 
511  for(i8=0; i8<4; i8++){
512  const int x8 = i8&1;
513  const int y8 = i8>>1;
514  int ref0, scale;
515  const int16_t (*l1mv)[2]= l1mv0;
516 
517  if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
518  continue;
519  h->sub_mb_type[i8] = sub_mb_type;
520 
521  fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
522  if(IS_INTRA(mb_type_col[y8])){
523  fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
524  fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
525  fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
526  continue;
527  }
528 
529  ref0 = l1ref0[x8 + y8*b8_stride];
530  if(ref0 >= 0)
531  ref0 = map_col_to_list0[0][ref0 + ref_offset];
532  else{
533  ref0 = map_col_to_list0[1][l1ref1[x8 + y8*b8_stride] + ref_offset];
534  l1mv= l1mv1;
535  }
536  scale = dist_scale_factor[ref0];
537  fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
538 
539  {
540  const int16_t *mv_col = l1mv[x8*3 + y8*b4_stride];
541  int my_col = (mv_col[1]<<y_shift)/2;
542  int mx = (scale * mv_col[0] + 128) >> 8;
543  int my = (scale * my_col + 128) >> 8;
544  fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
545  fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-my_col), 4);
546  }
547  }
548  return;
549  }
550 
551  /* one-to-one mv scaling */
552 
553  if(IS_16X16(*mb_type)){
554  int ref, mv0, mv1;
555 
556  fill_rectangle(&h->ref_cache[1][scan8[0]], 4, 4, 8, 0, 1);
557  if(IS_INTRA(mb_type_col[0])){
558  ref=mv0=mv1=0;
559  }else{
560  const int ref0 = l1ref0[0] >= 0 ? map_col_to_list0[0][l1ref0[0] + ref_offset]
561  : map_col_to_list0[1][l1ref1[0] + ref_offset];
562  const int scale = dist_scale_factor[ref0];
563  const int16_t *mv_col = l1ref0[0] >= 0 ? l1mv0[0] : l1mv1[0];
564  int mv_l0[2];
565  mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
566  mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
567  ref= ref0;
568  mv0= pack16to32(mv_l0[0],mv_l0[1]);
569  mv1= pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]);
570  }
571  fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
572  fill_rectangle(&h-> mv_cache[0][scan8[0]], 4, 4, 8, mv0, 4);
573  fill_rectangle(&h-> mv_cache[1][scan8[0]], 4, 4, 8, mv1, 4);
574  }else{
575  for(i8=0; i8<4; i8++){
576  const int x8 = i8&1;
577  const int y8 = i8>>1;
578  int ref0, scale;
579  const int16_t (*l1mv)[2]= l1mv0;
580 
581  if(is_b8x8 && !IS_DIRECT(h->sub_mb_type[i8]))
582  continue;
583  h->sub_mb_type[i8] = sub_mb_type;
584  fill_rectangle(&h->ref_cache[1][scan8[i8*4]], 2, 2, 8, 0, 1);
585  if(IS_INTRA(mb_type_col[0])){
586  fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, 0, 1);
587  fill_rectangle(&h-> mv_cache[0][scan8[i8*4]], 2, 2, 8, 0, 4);
588  fill_rectangle(&h-> mv_cache[1][scan8[i8*4]], 2, 2, 8, 0, 4);
589  continue;
590  }
591 
592  assert(b8_stride == 2);
593  ref0 = l1ref0[i8];
594  if(ref0 >= 0)
595  ref0 = map_col_to_list0[0][ref0 + ref_offset];
596  else{
597  ref0 = map_col_to_list0[1][l1ref1[i8] + ref_offset];
598  l1mv= l1mv1;
599  }
600  scale = dist_scale_factor[ref0];
601 
602  fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, ref0, 1);
603  if(IS_SUB_8X8(sub_mb_type)){
604  const int16_t *mv_col = l1mv[x8*3 + y8*3*b4_stride];
605  int mx = (scale * mv_col[0] + 128) >> 8;
606  int my = (scale * mv_col[1] + 128) >> 8;
607  fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, pack16to32(mx,my), 4);
608  fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, pack16to32(mx-mv_col[0],my-mv_col[1]), 4);
609  }else
610  for(i4=0; i4<4; i4++){
611  const int16_t *mv_col = l1mv[x8*2 + (i4&1) + (y8*2 + (i4>>1))*b4_stride];
612  int16_t *mv_l0 = h->mv_cache[0][scan8[i8*4+i4]];
613  mv_l0[0] = (scale * mv_col[0] + 128) >> 8;
614  mv_l0[1] = (scale * mv_col[1] + 128) >> 8;
615  AV_WN32A(h->mv_cache[1][scan8[i8*4+i4]],
616  pack16to32(mv_l0[0]-mv_col[0],mv_l0[1]-mv_col[1]));
617  }
618  }
619  }
620  }
621 }
622 
623 void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type){
624  if(h->direct_spatial_mv_pred){
625  pred_spatial_direct_motion(h, mb_type);
626  }else{
627  pred_temp_direct_motion(h, mb_type);
628  }
629 }
PICT_BOTTOM_FIELD
#define PICT_BOTTOM_FIELD
Definition: mpegvideo.h:663
start
Definition: start.py:1
Picture::ref_index
int8_t * ref_index[2]
Definition: mpegvideo.h:114
ref
FIXME Range Coding of cr are ref
Definition: snow.txt:367
C
#define C
B
#define B
Definition: dsputil.c:2025
ff_h264_direct_dist_scale_factor
void ff_h264_direct_dist_scale_factor(H264Context *const h)
Definition: h264_direct.c:51
H264Context::mb_y
int mb_y
Definition: h264.h:461
Picture::field_picture
int field_picture
whether or not the picture was encoded in separate fields
Definition: mpegvideo.h:169
H264Context::mb_height
int mb_height
Definition: h264.h:465
MB_TYPE_P0L0
#define MB_TYPE_P0L0
Definition: libavcodec/avcodec.h:849
mpegvideo.h
mpegvideo header.
H264Context
H264Context.
Definition: h264.h:260
ff_thread_await_progress
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before ff_thread_await_progress() has been called on them.reget_buffer() and buffer age optimizations no longer work.*The contents of buffers must not be written to after ff_thread_report_progress() has been called on them.This includes draw_edges().Porting codecs to frame threading
list
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFilterBuffer structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining list
Definition: filter_design.txt:23
H264Context::picture_structure
int picture_structure
Definition: h264.h:382
AV_WN32A
#define AV_WN32A(p, v)
Definition: intreadwrite.h:530
H264Context::slice_type_nos
int slice_type_nos
S free slice type (SI/SP are remapped to I/P)
Definition: h264.h:375
pack16to32
static av_always_inline uint32_t pack16to32(int a, int b)
Definition: h264.h:828
if
initialize output if(nPeaks >3)%at least 3 peaks in spectrum for trying to find f0 nf0peaks
ff_h264_pred_direct_motion
void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type)
Definition: h264_direct.c:623
AV_RN32A
#define AV_RN32A(p)
Definition: intreadwrite.h:518
Picture::ref_poc
int ref_poc[2][2][32]
h264 POCs of the frames/fields used as reference (FIXME need per slice)
Definition: mpegvideo.h:166
Picture::long_ref
int long_ref
1->long term reference 0->short term reference
Definition: mpegvideo.h:165
uint8_t
uint8_t
Definition: audio_convert.c:194
Picture::ref_count
int ref_count[2][2]
number of entries in ref_poc (FIXME need per slice)
Definition: mpegvideo.h:167
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
PICT_FRAME
#define PICT_FRAME
Definition: mpegvideo.h:664
m
window constants for m
Definition: extra/genbh92lobe.m:9
b
#define b
Definition: input.c:42
end
end end
Definition: extra/f0detection.m:15
H264Context::ref_list
Picture ref_list[2][48]
0..15: frame refs, 16..47: mbaff field refs.
Definition: h264.h:411
H264Context::mb_xy
int mb_xy
Definition: h264.h:468
H264Context::ref_count
unsigned int ref_count[2]
num_ref_idx_l0/1_active_minus1 + 1
Definition: h264.h:408
MB_TYPE_P1L1
#define MB_TYPE_P1L1
Definition: libavcodec/avcodec.h:852
H264Context::mb_x
int mb_x
Definition: h264.h:461
FFMIN3
#define FFMIN3(a, b, c)
Definition: common.h:59
pred_temp_direct_motion
static void pred_temp_direct_motion(H264Context *const h, int *mb_type)
Definition: h264_direct.c:412
fill_rectangle
static void fill_rectangle(SDL_Surface *screen, int x, int y, int w, int h, int color, int update)
Definition: ffplay.c:489
A
#define A(x)
Definition: arm/vp56_arith.h:28
IS_INTERLACED
#define IS_INTERLACED(a)
Definition: mpegvideo.h:142
MB_TYPE_P1L0
#define MB_TYPE_P1L0
Definition: libavcodec/avcodec.h:850
h264.h
H.264 / AVC / MPEG4 part10 codec.
Picture::tf
ThreadFrame tf
Definition: mpegvideo.h:99
U
#define U(x)
Definition: arm/vp56_arith.h:37
td
#define td
Definition: regdef.h:70
ff_h264_direct_ref_list_init
void ff_h264_direct_ref_list_init(H264Context *const h)
Definition: h264_direct.c:103
thread.h
Multithreading support functions.
mask
static const uint16_t mask[17]
Definition: lzw.c:37
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: libavcodec/avcodec.h:2594
Picture::reference
int reference
Definition: mpegvideo.h:178
H264Context::direct_spatial_mv_pred
int direct_spatial_mv_pred
Definition: h264.h:397
IS_INTRA
#define IS_INTRA(a)
Definition: mpegvideo.h:138
avcodec.h
external API header
H264Context::map_col_to_list0
int map_col_to_list0[2][16+32]
Definition: h264.h:402
MB_TYPE_16x16_OR_INTRA
#define MB_TYPE_16x16_OR_INTRA
H264Context::col_parity
int col_parity
Definition: h264.h:398
scan8
static const uint8_t scan8[16 *3+3]
Definition: h264.h:812
rectangle.h
useful rectangle filling function
IS_8X8
#define IS_8X8(a)
Definition: mpegvideo.h:148
H264Context::x264_build
int x264_build
Definition: h264.h:459
MB_TYPE_P0L1
#define MB_TYPE_P0L1
Definition: libavcodec/avcodec.h:851
MB_TYPE_DIRECT2
#define MB_TYPE_DIRECT2
Definition: libavcodec/avcodec.h:845
FFMIN
#define FFMIN(a, b)
Definition: common.h:58
Picture::poc
int poc
h264 frame POC
Definition: mpegvideo.h:160
MB_TYPE_INTERLACED
#define MB_TYPE_INTERLACED
Definition: libavcodec/avcodec.h:844
Picture::motion_val
int16_t(*[2] motion_val)[2]
Definition: mpegvideo.h:105
Picture
Picture.
Definition: mpegvideo.h:97
H264Context::sps
SPS sps
current sps
Definition: h264.h:360
MB_TYPE_L0L1
#define MB_TYPE_L0L1
Definition: libavcodec/avcodec.h:855
H264Context::dist_scale_factor
int dist_scale_factor[32]
Definition: h264.h:400
FFABS
#define FFABS(a)
Definition: common.h:53
Picture::frame_num
int frame_num
h264 frame_num (raw frame_num from slice header)
Definition: mpegvideo.h:161
SPS::direct_8x8_inference_flag
int direct_8x8_inference_flag
Definition: h264.h:169
get_scale_factor
static int get_scale_factor(H264Context *const h, int poc, int poc1, int i)
Definition: h264_direct.c:39
PART_NOT_AVAILABLE
#define PART_NOT_AVAILABLE
Definition: h264.h:339
mv
static const int8_t mv[256][2]
Definition: libavcodec/4xm.c:73
pred_spatial_direct_motion
static void pred_spatial_direct_motion(H264Context *const h, int *mb_type)
Definition: h264_direct.c:161
Picture::mbaff
int mbaff
h264 1 -> MBAFF frame 0-> not MBAFF
Definition: mpegvideo.h:168
H264Context::mb_stride
int mb_stride
Definition: h264.h:466
H264Context::avctx
AVCodecContext * avctx
Definition: h264.h:261
MB_TYPE_8x16
#define MB_TYPE_8x16
Definition: libavcodec/avcodec.h:842
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: libavcodec/avcodec.h:2586
i
synthesis window for stochastic i
Definition: code Kat/hpsmodel.m:34
MB_TYPE_16x16
#define MB_TYPE_16x16
Definition: libavcodec/avcodec.h:840
mid_pred
#define mid_pred
Definition: mathops.h:94
Picture::field_poc
int field_poc[2]
h264 top/bottom POC
Definition: mpegvideo.h:159
n
n
Definition: genspecsines_sin.m:10
H264Context::dist_scale_factor_field
int dist_scale_factor_field[2][32]
Definition: h264.h:401
await_reference_mb_row
static void await_reference_mb_row(H264Context *const h, Picture *ref, int mb_y)
Definition: h264_direct.c:144
internal.h
common internal api header.
MB_TYPE_8x8
#define MB_TYPE_8x8
Definition: libavcodec/avcodec.h:843
AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:218
scale
Same thing on a dB scale
Definition: FFT of a Simple Sinusoid.m:36
MB_TYPE_16x8
#define MB_TYPE_16x8
Definition: libavcodec/avcodec.h:841
H264Context::col_fieldoff
int col_fieldoff
Definition: h264.h:399
H264Context::cur_pic_ptr
Picture * cur_pic_ptr
Definition: h264.h:273
FRAME_MBAFF
#define FRAME_MBAFF(h)
Definition: h264.h:66
IS_SUB_8X8
#define IS_SUB_8X8(a)
Definition: mpegvideo.h:149
IS_DIRECT
#define IS_DIRECT(a)
Definition: mpegvideo.h:143
AV_ZERO32
#define AV_ZERO32(d)
Definition: intreadwrite.h:606
IS_16X16
#define IS_16X16(a)
Definition: mpegvideo.h:145
H264Context::mb2b_xy
uint32_t * mb2b_xy
Definition: h264.h:352
HAVE_THREADS
#define HAVE_THREADS
Definition: config.h:274
Picture::mb_type
uint32_t * mb_type
Definition: mpegvideo.h:108
H264Context::map_col_to_list0_field
int map_col_to_list0_field[2][2][16+32]
Definition: h264.h:403
MB_TYPE_L0
#define MB_TYPE_L0
Definition: libavcodec/avcodec.h:853
H264Context::b_stride
int b_stride
Definition: h264.h:354
tb
#define tb
Definition: regdef.h:68
fill_colmap
static void fill_colmap(H264Context *h, int map[2][16+32], int list, int field, int colfield, int mbafi)
Definition: h264_direct.c:70
a
a
Definition: h264pred_template.c:466
Generated on Sun Apr 28 2024 06:51:14 for FFmpeg by   doxygen 1.8.11