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h264_mb.c
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1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... 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
24  * H.264 / AVC / MPEG4 part10 macroblock decoding
25  */
26 
27 #include <stdint.h>
28 
29 #include "config.h"
30 
31 #include "libavutil/common.h"
32 #include "libavutil/intreadwrite.h"
33 #include "avcodec.h"
34 #include "h264.h"
35 #include "qpeldsp.h"
36 #include "svq3.h"
37 #include "thread.h"
38 
39 static inline int get_lowest_part_list_y(H264Context *h, H264Picture *pic, int n,
40  int height, int y_offset, int list)
41 {
42  int raw_my = h->mv_cache[list][scan8[n]][1];
43  int filter_height_down = (raw_my & 3) ? 3 : 0;
44  int full_my = (raw_my >> 2) + y_offset;
45  int bottom = full_my + filter_height_down + height;
46 
47  av_assert2(height >= 0);
48 
49  return FFMAX(0, bottom);
50 }
51 
52 static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n,
53  int height, int y_offset, int list0,
54  int list1, int *nrefs)
55 {
56  int my;
57 
58  y_offset += 16 * (h->mb_y >> MB_FIELD(h));
59 
60  if (list0) {
61  int ref_n = h->ref_cache[0][scan8[n]];
62  H264Picture *ref = &h->ref_list[0][ref_n];
63 
64  // Error resilience puts the current picture in the ref list.
65  // Don't try to wait on these as it will cause a deadlock.
66  // Fields can wait on each other, though.
67  if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
68  (ref->reference & 3) != h->picture_structure) {
69  my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
70  if (refs[0][ref_n] < 0)
71  nrefs[0] += 1;
72  refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
73  }
74  }
75 
76  if (list1) {
77  int ref_n = h->ref_cache[1][scan8[n]];
78  H264Picture *ref = &h->ref_list[1][ref_n];
79 
80  if (ref->tf.progress->data != h->cur_pic.tf.progress->data ||
81  (ref->reference & 3) != h->picture_structure) {
82  my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
83  if (refs[1][ref_n] < 0)
84  nrefs[1] += 1;
85  refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
86  }
87  }
88 }
89 
90 /**
91  * Wait until all reference frames are available for MC operations.
92  *
93  * @param h the H264 context
94  */
95 static void await_references(H264Context *h)
96 {
97  const int mb_xy = h->mb_xy;
98  const int mb_type = h->cur_pic.mb_type[mb_xy];
99  int refs[2][48];
100  int nrefs[2] = { 0 };
101  int ref, list;
102 
103  memset(refs, -1, sizeof(refs));
104 
105  if (IS_16X16(mb_type)) {
106  get_lowest_part_y(h, refs, 0, 16, 0,
107  IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
108  } else if (IS_16X8(mb_type)) {
109  get_lowest_part_y(h, refs, 0, 8, 0,
110  IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
111  get_lowest_part_y(h, refs, 8, 8, 8,
112  IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
113  } else if (IS_8X16(mb_type)) {
114  get_lowest_part_y(h, refs, 0, 16, 0,
115  IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
116  get_lowest_part_y(h, refs, 4, 16, 0,
117  IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
118  } else {
119  int i;
120 
121  av_assert2(IS_8X8(mb_type));
122 
123  for (i = 0; i < 4; i++) {
124  const int sub_mb_type = h->sub_mb_type[i];
125  const int n = 4 * i;
126  int y_offset = (i & 2) << 2;
127 
128  if (IS_SUB_8X8(sub_mb_type)) {
129  get_lowest_part_y(h, refs, n, 8, y_offset,
130  IS_DIR(sub_mb_type, 0, 0),
131  IS_DIR(sub_mb_type, 0, 1),
132  nrefs);
133  } else if (IS_SUB_8X4(sub_mb_type)) {
134  get_lowest_part_y(h, refs, n, 4, y_offset,
135  IS_DIR(sub_mb_type, 0, 0),
136  IS_DIR(sub_mb_type, 0, 1),
137  nrefs);
138  get_lowest_part_y(h, refs, n + 2, 4, y_offset + 4,
139  IS_DIR(sub_mb_type, 0, 0),
140  IS_DIR(sub_mb_type, 0, 1),
141  nrefs);
142  } else if (IS_SUB_4X8(sub_mb_type)) {
143  get_lowest_part_y(h, refs, n, 8, y_offset,
144  IS_DIR(sub_mb_type, 0, 0),
145  IS_DIR(sub_mb_type, 0, 1),
146  nrefs);
147  get_lowest_part_y(h, refs, n + 1, 8, y_offset,
148  IS_DIR(sub_mb_type, 0, 0),
149  IS_DIR(sub_mb_type, 0, 1),
150  nrefs);
151  } else {
152  int j;
153  av_assert2(IS_SUB_4X4(sub_mb_type));
154  for (j = 0; j < 4; j++) {
155  int sub_y_offset = y_offset + 2 * (j & 2);
156  get_lowest_part_y(h, refs, n + j, 4, sub_y_offset,
157  IS_DIR(sub_mb_type, 0, 0),
158  IS_DIR(sub_mb_type, 0, 1),
159  nrefs);
160  }
161  }
162  }
163  }
164 
165  for (list = h->list_count - 1; list >= 0; list--)
166  for (ref = 0; ref < 48 && nrefs[list]; ref++) {
167  int row = refs[list][ref];
168  if (row >= 0) {
169  H264Picture *ref_pic = &h->ref_list[list][ref];
170  int ref_field = ref_pic->reference - 1;
171  int ref_field_picture = ref_pic->field_picture;
172  int pic_height = 16 * h->mb_height >> ref_field_picture;
173 
174  row <<= MB_MBAFF(h);
175  nrefs[list]--;
176 
177  if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields
178  ff_thread_await_progress(&ref_pic->tf,
179  FFMIN((row >> 1) - !(row & 1),
180  pic_height - 1),
181  1);
182  ff_thread_await_progress(&ref_pic->tf,
183  FFMIN((row >> 1), pic_height - 1),
184  0);
185  } else if (FIELD_PICTURE(h) && !ref_field_picture) { // field referencing one field of a frame
186  ff_thread_await_progress(&ref_pic->tf,
187  FFMIN(row * 2 + ref_field,
188  pic_height - 1),
189  0);
190  } else if (FIELD_PICTURE(h)) {
191  ff_thread_await_progress(&ref_pic->tf,
192  FFMIN(row, pic_height - 1),
193  ref_field);
194  } else {
195  ff_thread_await_progress(&ref_pic->tf,
196  FFMIN(row, pic_height - 1),
197  0);
198  }
199  }
200  }
201 }
202 
203 static av_always_inline void mc_dir_part(H264Context *h, H264Picture *pic,
204  int n, int square, int height,
205  int delta, int list,
206  uint8_t *dest_y, uint8_t *dest_cb,
207  uint8_t *dest_cr,
208  int src_x_offset, int src_y_offset,
209  qpel_mc_func *qpix_op,
210  h264_chroma_mc_func chroma_op,
211  int pixel_shift, int chroma_idc)
212 {
213  const int mx = h->mv_cache[list][scan8[n]][0] + src_x_offset * 8;
214  int my = h->mv_cache[list][scan8[n]][1] + src_y_offset * 8;
215  const int luma_xy = (mx & 3) + ((my & 3) << 2);
216  ptrdiff_t offset = ((mx >> 2) << pixel_shift) + (my >> 2) * h->mb_linesize;
217  uint8_t *src_y = pic->f.data[0] + offset;
218  uint8_t *src_cb, *src_cr;
219  int extra_width = 0;
220  int extra_height = 0;
221  int emu = 0;
222  const int full_mx = mx >> 2;
223  const int full_my = my >> 2;
224  const int pic_width = 16 * h->mb_width;
225  const int pic_height = 16 * h->mb_height >> MB_FIELD(h);
226  int ysh;
227 
228  if (mx & 7)
229  extra_width -= 3;
230  if (my & 7)
231  extra_height -= 3;
232 
233  if (full_mx < 0 - extra_width ||
234  full_my < 0 - extra_height ||
235  full_mx + 16 /*FIXME*/ > pic_width + extra_width ||
236  full_my + 16 /*FIXME*/ > pic_height + extra_height) {
237  h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
238  src_y - (2 << pixel_shift) - 2 * h->mb_linesize,
239  h->mb_linesize, h->mb_linesize,
240  16 + 5, 16 + 5 /*FIXME*/, full_mx - 2,
241  full_my - 2, pic_width, pic_height);
242  src_y = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
243  emu = 1;
244  }
245 
246  qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); // FIXME try variable height perhaps?
247  if (!square)
248  qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
249 
250  if (CONFIG_GRAY && h->flags & CODEC_FLAG_GRAY)
251  return;
252 
253  if (chroma_idc == 3 /* yuv444 */) {
254  src_cb = pic->f.data[1] + offset;
255  if (emu) {
256  h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
257  src_cb - (2 << pixel_shift) - 2 * h->mb_linesize,
258  h->mb_linesize, h->mb_linesize,
259  16 + 5, 16 + 5 /*FIXME*/,
260  full_mx - 2, full_my - 2,
261  pic_width, pic_height);
262  src_cb = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
263  }
264  qpix_op[luma_xy](dest_cb, src_cb, h->mb_linesize); // FIXME try variable height perhaps?
265  if (!square)
266  qpix_op[luma_xy](dest_cb + delta, src_cb + delta, h->mb_linesize);
267 
268  src_cr = pic->f.data[2] + offset;
269  if (emu) {
270  h->vdsp.emulated_edge_mc(h->edge_emu_buffer,
271  src_cr - (2 << pixel_shift) - 2 * h->mb_linesize,
272  h->mb_linesize, h->mb_linesize,
273  16 + 5, 16 + 5 /*FIXME*/,
274  full_mx - 2, full_my - 2,
275  pic_width, pic_height);
276  src_cr = h->edge_emu_buffer + (2 << pixel_shift) + 2 * h->mb_linesize;
277  }
278  qpix_op[luma_xy](dest_cr, src_cr, h->mb_linesize); // FIXME try variable height perhaps?
279  if (!square)
280  qpix_op[luma_xy](dest_cr + delta, src_cr + delta, h->mb_linesize);
281  return;
282  }
283 
284  ysh = 3 - (chroma_idc == 2 /* yuv422 */);
285  if (chroma_idc == 1 /* yuv420 */ && MB_FIELD(h)) {
286  // chroma offset when predicting from a field of opposite parity
287  my += 2 * ((h->mb_y & 1) - (pic->reference - 1));
288  emu |= (my >> 3) < 0 || (my >> 3) + 8 >= (pic_height >> 1);
289  }
290 
291  src_cb = pic->f.data[1] + ((mx >> 3) << pixel_shift) +
292  (my >> ysh) * h->mb_uvlinesize;
293  src_cr = pic->f.data[2] + ((mx >> 3) << pixel_shift) +
294  (my >> ysh) * h->mb_uvlinesize;
295 
296  if (emu) {
297  h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cb,
298  h->mb_uvlinesize, h->mb_uvlinesize,
299  9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
300  pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
301  src_cb = h->edge_emu_buffer;
302  }
303  chroma_op(dest_cb, src_cb, h->mb_uvlinesize,
304  height >> (chroma_idc == 1 /* yuv420 */),
305  mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
306 
307  if (emu) {
308  h->vdsp.emulated_edge_mc(h->edge_emu_buffer, src_cr,
309  h->mb_uvlinesize, h->mb_uvlinesize,
310  9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
311  pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
312  src_cr = h->edge_emu_buffer;
313  }
314  chroma_op(dest_cr, src_cr, h->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
315  mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
316 }
317 
318 static av_always_inline void mc_part_std(H264Context *h, int n, int square,
319  int height, int delta,
320  uint8_t *dest_y, uint8_t *dest_cb,
321  uint8_t *dest_cr,
322  int x_offset, int y_offset,
323  qpel_mc_func *qpix_put,
324  h264_chroma_mc_func chroma_put,
325  qpel_mc_func *qpix_avg,
326  h264_chroma_mc_func chroma_avg,
327  int list0, int list1,
328  int pixel_shift, int chroma_idc)
329 {
330  qpel_mc_func *qpix_op = qpix_put;
331  h264_chroma_mc_func chroma_op = chroma_put;
332 
333  dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
334  if (chroma_idc == 3 /* yuv444 */) {
335  dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
336  dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
337  } else if (chroma_idc == 2 /* yuv422 */) {
338  dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
339  dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
340  } else { /* yuv420 */
341  dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
342  dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
343  }
344  x_offset += 8 * h->mb_x;
345  y_offset += 8 * (h->mb_y >> MB_FIELD(h));
346 
347  if (list0) {
348  H264Picture *ref = &h->ref_list[0][h->ref_cache[0][scan8[n]]];
349  mc_dir_part(h, ref, n, square, height, delta, 0,
350  dest_y, dest_cb, dest_cr, x_offset, y_offset,
351  qpix_op, chroma_op, pixel_shift, chroma_idc);
352 
353  qpix_op = qpix_avg;
354  chroma_op = chroma_avg;
355  }
356 
357  if (list1) {
358  H264Picture *ref = &h->ref_list[1][h->ref_cache[1][scan8[n]]];
359  mc_dir_part(h, ref, n, square, height, delta, 1,
360  dest_y, dest_cb, dest_cr, x_offset, y_offset,
361  qpix_op, chroma_op, pixel_shift, chroma_idc);
362  }
363 }
364 
365 static av_always_inline void mc_part_weighted(H264Context *h, int n, int square,
366  int height, int delta,
367  uint8_t *dest_y, uint8_t *dest_cb,
368  uint8_t *dest_cr,
369  int x_offset, int y_offset,
370  qpel_mc_func *qpix_put,
371  h264_chroma_mc_func chroma_put,
372  h264_weight_func luma_weight_op,
373  h264_weight_func chroma_weight_op,
374  h264_biweight_func luma_weight_avg,
375  h264_biweight_func chroma_weight_avg,
376  int list0, int list1,
377  int pixel_shift, int chroma_idc)
378 {
379  int chroma_height;
380 
381  dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
382  if (chroma_idc == 3 /* yuv444 */) {
383  chroma_height = height;
384  chroma_weight_avg = luma_weight_avg;
385  chroma_weight_op = luma_weight_op;
386  dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
387  dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * h->mb_linesize;
388  } else if (chroma_idc == 2 /* yuv422 */) {
389  chroma_height = height;
390  dest_cb += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
391  dest_cr += (x_offset << pixel_shift) + 2 * y_offset * h->mb_uvlinesize;
392  } else { /* yuv420 */
393  chroma_height = height >> 1;
394  dest_cb += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
395  dest_cr += (x_offset << pixel_shift) + y_offset * h->mb_uvlinesize;
396  }
397  x_offset += 8 * h->mb_x;
398  y_offset += 8 * (h->mb_y >> MB_FIELD(h));
399 
400  if (list0 && list1) {
401  /* don't optimize for luma-only case, since B-frames usually
402  * use implicit weights => chroma too. */
403  uint8_t *tmp_cb = h->bipred_scratchpad;
404  uint8_t *tmp_cr = h->bipred_scratchpad + (16 << pixel_shift);
405  uint8_t *tmp_y = h->bipred_scratchpad + 16 * h->mb_uvlinesize;
406  int refn0 = h->ref_cache[0][scan8[n]];
407  int refn1 = h->ref_cache[1][scan8[n]];
408 
409  mc_dir_part(h, &h->ref_list[0][refn0], n, square, height, delta, 0,
410  dest_y, dest_cb, dest_cr,
411  x_offset, y_offset, qpix_put, chroma_put,
412  pixel_shift, chroma_idc);
413  mc_dir_part(h, &h->ref_list[1][refn1], n, square, height, delta, 1,
414  tmp_y, tmp_cb, tmp_cr,
415  x_offset, y_offset, qpix_put, chroma_put,
416  pixel_shift, chroma_idc);
417 
418  if (h->use_weight == 2) {
419  int weight0 = h->implicit_weight[refn0][refn1][h->mb_y & 1];
420  int weight1 = 64 - weight0;
421  luma_weight_avg(dest_y, tmp_y, h->mb_linesize,
422  height, 5, weight0, weight1, 0);
423  chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize,
424  chroma_height, 5, weight0, weight1, 0);
425  chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize,
426  chroma_height, 5, weight0, weight1, 0);
427  } else {
428  luma_weight_avg(dest_y, tmp_y, h->mb_linesize, height,
429  h->luma_log2_weight_denom,
430  h->luma_weight[refn0][0][0],
431  h->luma_weight[refn1][1][0],
432  h->luma_weight[refn0][0][1] +
433  h->luma_weight[refn1][1][1]);
434  chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, chroma_height,
435  h->chroma_log2_weight_denom,
436  h->chroma_weight[refn0][0][0][0],
437  h->chroma_weight[refn1][1][0][0],
438  h->chroma_weight[refn0][0][0][1] +
439  h->chroma_weight[refn1][1][0][1]);
440  chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, chroma_height,
441  h->chroma_log2_weight_denom,
442  h->chroma_weight[refn0][0][1][0],
443  h->chroma_weight[refn1][1][1][0],
444  h->chroma_weight[refn0][0][1][1] +
445  h->chroma_weight[refn1][1][1][1]);
446  }
447  } else {
448  int list = list1 ? 1 : 0;
449  int refn = h->ref_cache[list][scan8[n]];
450  H264Picture *ref = &h->ref_list[list][refn];
451  mc_dir_part(h, ref, n, square, height, delta, list,
452  dest_y, dest_cb, dest_cr, x_offset, y_offset,
453  qpix_put, chroma_put, pixel_shift, chroma_idc);
454 
455  luma_weight_op(dest_y, h->mb_linesize, height,
456  h->luma_log2_weight_denom,
457  h->luma_weight[refn][list][0],
458  h->luma_weight[refn][list][1]);
459  if (h->use_weight_chroma) {
460  chroma_weight_op(dest_cb, h->mb_uvlinesize, chroma_height,
461  h->chroma_log2_weight_denom,
462  h->chroma_weight[refn][list][0][0],
463  h->chroma_weight[refn][list][0][1]);
464  chroma_weight_op(dest_cr, h->mb_uvlinesize, chroma_height,
465  h->chroma_log2_weight_denom,
466  h->chroma_weight[refn][list][1][0],
467  h->chroma_weight[refn][list][1][1]);
468  }
469  }
470 }
471 
472 static av_always_inline void prefetch_motion(H264Context *h, int list,
473  int pixel_shift, int chroma_idc)
474 {
475  /* fetch pixels for estimated mv 4 macroblocks ahead
476  * optimized for 64byte cache lines */
477  const int refn = h->ref_cache[list][scan8[0]];
478  if (refn >= 0) {
479  const int mx = (h->mv_cache[list][scan8[0]][0] >> 2) + 16 * h->mb_x + 8;
480  const int my = (h->mv_cache[list][scan8[0]][1] >> 2) + 16 * h->mb_y;
481  uint8_t **src = h->ref_list[list][refn].f.data;
482  int off = (mx << pixel_shift) +
483  (my + (h->mb_x & 3) * 4) * h->mb_linesize +
484  (64 << pixel_shift);
485  h->vdsp.prefetch(src[0] + off, h->linesize, 4);
486  if (chroma_idc == 3 /* yuv444 */) {
487  h->vdsp.prefetch(src[1] + off, h->linesize, 4);
488  h->vdsp.prefetch(src[2] + off, h->linesize, 4);
489  } else {
490  off= (((mx>>1)+64)<<pixel_shift) + ((my>>1) + (h->mb_x&7))*h->uvlinesize;
491  h->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);
492  }
493  }
494 }
495 
496 static av_always_inline void xchg_mb_border(H264Context *h, uint8_t *src_y,
497  uint8_t *src_cb, uint8_t *src_cr,
498  int linesize, int uvlinesize,
499  int xchg, int chroma444,
500  int simple, int pixel_shift)
501 {
502  int deblock_topleft;
503  int deblock_top;
504  int top_idx = 1;
505  uint8_t *top_border_m1;
506  uint8_t *top_border;
507 
508  if (!simple && FRAME_MBAFF(h)) {
509  if (h->mb_y & 1) {
510  if (!MB_MBAFF(h))
511  return;
512  } else {
513  top_idx = MB_MBAFF(h) ? 0 : 1;
514  }
515  }
516 
517  if (h->deblocking_filter == 2) {
518  deblock_topleft = h->slice_table[h->mb_xy - 1 - h->mb_stride] == h->slice_num;
519  deblock_top = h->top_type;
520  } else {
521  deblock_topleft = (h->mb_x > 0);
522  deblock_top = (h->mb_y > !!MB_FIELD(h));
523  }
524 
525  src_y -= linesize + 1 + pixel_shift;
526  src_cb -= uvlinesize + 1 + pixel_shift;
527  src_cr -= uvlinesize + 1 + pixel_shift;
528 
529  top_border_m1 = h->top_borders[top_idx][h->mb_x - 1];
530  top_border = h->top_borders[top_idx][h->mb_x];
531 
532 #define XCHG(a, b, xchg) \
533  if (pixel_shift) { \
534  if (xchg) { \
535  AV_SWAP64(b + 0, a + 0); \
536  AV_SWAP64(b + 8, a + 8); \
537  } else { \
538  AV_COPY128(b, a); \
539  } \
540  } else if (xchg) \
541  AV_SWAP64(b, a); \
542  else \
543  AV_COPY64(b, a);
544 
545  if (deblock_top) {
546  if (deblock_topleft) {
547  XCHG(top_border_m1 + (8 << pixel_shift),
548  src_y - (7 << pixel_shift), 1);
549  }
550  XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
551  XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
552  if (h->mb_x + 1 < h->mb_width) {
553  XCHG(h->top_borders[top_idx][h->mb_x + 1],
554  src_y + (17 << pixel_shift), 1);
555  }
556  if (simple || !CONFIG_GRAY || !(h->flags & CODEC_FLAG_GRAY)) {
557  if (chroma444) {
558  if (deblock_topleft) {
559  XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
560  XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
561  }
562  XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
563  XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
564  XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
565  XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
566  if (h->mb_x + 1 < h->mb_width) {
567  XCHG(h->top_borders[top_idx][h->mb_x + 1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
568  XCHG(h->top_borders[top_idx][h->mb_x + 1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
569  }
570  } else {
571  if (deblock_topleft) {
572  XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
573  XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
574  }
575  XCHG(top_border + (16 << pixel_shift), src_cb + 1 + pixel_shift, 1);
576  XCHG(top_border + (24 << pixel_shift), src_cr + 1 + pixel_shift, 1);
577  }
578  }
579  }
580 }
581 
582 static av_always_inline int dctcoef_get(int16_t *mb, int high_bit_depth,
583  int index)
584 {
585  if (high_bit_depth) {
586  return AV_RN32A(((int32_t *)mb) + index);
587  } else
588  return AV_RN16A(mb + index);
589 }
590 
591 static av_always_inline void dctcoef_set(int16_t *mb, int high_bit_depth,
592  int index, int value)
593 {
594  if (high_bit_depth) {
595  AV_WN32A(((int32_t *)mb) + index, value);
596  } else
597  AV_WN16A(mb + index, value);
598 }
599 
600 static av_always_inline void hl_decode_mb_predict_luma(H264Context *h,
601  int mb_type, int is_h264,
602  int simple,
603  int transform_bypass,
604  int pixel_shift,
605  int *block_offset,
606  int linesize,
607  uint8_t *dest_y, int p)
608 {
609  void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
610  void (*idct_dc_add)(uint8_t *dst, int16_t *block, int stride);
611  int i;
612  int qscale = p == 0 ? h->qscale : h->chroma_qp[p - 1];
613  block_offset += 16 * p;
614  if (IS_INTRA4x4(mb_type)) {
615  if (IS_8x8DCT(mb_type)) {
616  if (transform_bypass) {
617  idct_dc_add =
618  idct_add = h->h264dsp.h264_add_pixels8_clear;
619  } else {
620  idct_dc_add = h->h264dsp.h264_idct8_dc_add;
621  idct_add = h->h264dsp.h264_idct8_add;
622  }
623  for (i = 0; i < 16; i += 4) {
624  uint8_t *const ptr = dest_y + block_offset[i];
625  const int dir = h->intra4x4_pred_mode_cache[scan8[i]];
626  if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
627  if (h->x264_build != -1) {
628  h->hpc.pred8x8l_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
629  } else
630  h->hpc.pred8x8l_filter_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift),
631  (h-> topleft_samples_available << i) & 0x8000,
632  (h->topright_samples_available << i) & 0x4000, linesize);
633  } else {
634  const int nnz = h->non_zero_count_cache[scan8[i + p * 16]];
635  h->hpc.pred8x8l[dir](ptr, (h->topleft_samples_available << i) & 0x8000,
636  (h->topright_samples_available << i) & 0x4000, linesize);
637  if (nnz) {
638  if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
639  idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
640  else
641  idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
642  }
643  }
644  }
645  } else {
646  if (transform_bypass) {
647  idct_dc_add =
648  idct_add = h->h264dsp.h264_add_pixels4_clear;
649  } else {
650  idct_dc_add = h->h264dsp.h264_idct_dc_add;
651  idct_add = h->h264dsp.h264_idct_add;
652  }
653  for (i = 0; i < 16; i++) {
654  uint8_t *const ptr = dest_y + block_offset[i];
655  const int dir = h->intra4x4_pred_mode_cache[scan8[i]];
656 
657  if (transform_bypass && h->sps.profile_idc == 244 && dir <= 1) {
658  h->hpc.pred4x4_add[dir](ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
659  } else {
660  uint8_t *topright;
661  int nnz, tr;
662  uint64_t tr_high;
663  if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
664  const int topright_avail = (h->topright_samples_available << i) & 0x8000;
665  av_assert2(h->mb_y || linesize <= block_offset[i]);
666  if (!topright_avail) {
667  if (pixel_shift) {
668  tr_high = ((uint16_t *)ptr)[3 - linesize / 2] * 0x0001000100010001ULL;
669  topright = (uint8_t *)&tr_high;
670  } else {
671  tr = ptr[3 - linesize] * 0x01010101u;
672  topright = (uint8_t *)&tr;
673  }
674  } else
675  topright = ptr + (4 << pixel_shift) - linesize;
676  } else
677  topright = NULL;
678 
679  h->hpc.pred4x4[dir](ptr, topright, linesize);
680  nnz = h->non_zero_count_cache[scan8[i + p * 16]];
681  if (nnz) {
682  if (is_h264) {
683  if (nnz == 1 && dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
684  idct_dc_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
685  else
686  idct_add(ptr, h->mb + (i * 16 + p * 256 << pixel_shift), linesize);
687  } else if (CONFIG_SVQ3_DECODER)
688  ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize, qscale, 0);
689  }
690  }
691  }
692  }
693  } else {
694  h->hpc.pred16x16[h->intra16x16_pred_mode](dest_y, linesize);
695  if (is_h264) {
696  if (h->non_zero_count_cache[scan8[LUMA_DC_BLOCK_INDEX + p]]) {
697  if (!transform_bypass)
698  h->h264dsp.h264_luma_dc_dequant_idct(h->mb + (p * 256 << pixel_shift),
699  h->mb_luma_dc[p],
700  h->dequant4_coeff[p][qscale][0]);
701  else {
702  static const uint8_t dc_mapping[16] = {
703  0 * 16, 1 * 16, 4 * 16, 5 * 16,
704  2 * 16, 3 * 16, 6 * 16, 7 * 16,
705  8 * 16, 9 * 16, 12 * 16, 13 * 16,
706  10 * 16, 11 * 16, 14 * 16, 15 * 16
707  };
708  for (i = 0; i < 16; i++)
709  dctcoef_set(h->mb + (p * 256 << pixel_shift),
710  pixel_shift, dc_mapping[i],
711  dctcoef_get(h->mb_luma_dc[p],
712  pixel_shift, i));
713  }
714  }
715  } else if (CONFIG_SVQ3_DECODER)
716  ff_svq3_luma_dc_dequant_idct_c(h->mb + p * 256,
717  h->mb_luma_dc[p], qscale);
718  }
719 }
720 
721 static av_always_inline void hl_decode_mb_idct_luma(H264Context *h, int mb_type,
722  int is_h264, int simple,
723  int transform_bypass,
724  int pixel_shift,
725  int *block_offset,
726  int linesize,
727  uint8_t *dest_y, int p)
728 {
729  void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
730  int i;
731  block_offset += 16 * p;
732  if (!IS_INTRA4x4(mb_type)) {
733  if (is_h264) {
734  if (IS_INTRA16x16(mb_type)) {
735  if (transform_bypass) {
736  if (h->sps.profile_idc == 244 &&
737  (h->intra16x16_pred_mode == VERT_PRED8x8 ||
738  h->intra16x16_pred_mode == HOR_PRED8x8)) {
739  h->hpc.pred16x16_add[h->intra16x16_pred_mode](dest_y, block_offset,
740  h->mb + (p * 256 << pixel_shift),
741  linesize);
742  } else {
743  for (i = 0; i < 16; i++)
744  if (h->non_zero_count_cache[scan8[i + p * 16]] ||
745  dctcoef_get(h->mb, pixel_shift, i * 16 + p * 256))
746  h->h264dsp.h264_add_pixels4_clear(dest_y + block_offset[i],
747  h->mb + (i * 16 + p * 256 << pixel_shift),
748  linesize);
749  }
750  } else {
751  h->h264dsp.h264_idct_add16intra(dest_y, block_offset,
752  h->mb + (p * 256 << pixel_shift),
753  linesize,
754  h->non_zero_count_cache + p * 5 * 8);
755  }
756  } else if (h->cbp & 15) {
757  if (transform_bypass) {
758  const int di = IS_8x8DCT(mb_type) ? 4 : 1;
759  idct_add = IS_8x8DCT(mb_type) ? h->h264dsp.h264_add_pixels8_clear
760  : h->h264dsp.h264_add_pixels4_clear;
761  for (i = 0; i < 16; i += di)
762  if (h->non_zero_count_cache[scan8[i + p * 16]])
763  idct_add(dest_y + block_offset[i],
764  h->mb + (i * 16 + p * 256 << pixel_shift),
765  linesize);
766  } else {
767  if (IS_8x8DCT(mb_type))
768  h->h264dsp.h264_idct8_add4(dest_y, block_offset,
769  h->mb + (p * 256 << pixel_shift),
770  linesize,
771  h->non_zero_count_cache + p * 5 * 8);
772  else
773  h->h264dsp.h264_idct_add16(dest_y, block_offset,
774  h->mb + (p * 256 << pixel_shift),
775  linesize,
776  h->non_zero_count_cache + p * 5 * 8);
777  }
778  }
779  } else if (CONFIG_SVQ3_DECODER) {
780  for (i = 0; i < 16; i++)
781  if (h->non_zero_count_cache[scan8[i + p * 16]] || h->mb[i * 16 + p * 256]) {
782  // FIXME benchmark weird rule, & below
783  uint8_t *const ptr = dest_y + block_offset[i];
784  ff_svq3_add_idct_c(ptr, h->mb + i * 16 + p * 256, linesize,
785  h->qscale, IS_INTRA(mb_type) ? 1 : 0);
786  }
787  }
788  }
789 }
790 
791 #define BITS 8
792 #define SIMPLE 1
793 #include "h264_mb_template.c"
794 
795 #undef BITS
796 #define BITS 16
797 #include "h264_mb_template.c"
798 
799 #undef SIMPLE
800 #define SIMPLE 0
801 #include "h264_mb_template.c"
802 
803 void ff_h264_hl_decode_mb(H264Context *h)
804 {
805  const int mb_xy = h->mb_xy;
806  const int mb_type = h->cur_pic.mb_type[mb_xy];
807  int is_complex = CONFIG_SMALL || h->is_complex ||
808  IS_INTRA_PCM(mb_type) || h->qscale == 0;
809 
810  if (CHROMA444(h)) {
811  if (is_complex || h->pixel_shift)
812  hl_decode_mb_444_complex(h);
813  else
814  hl_decode_mb_444_simple_8(h);
815  } else if (is_complex) {
816  hl_decode_mb_complex(h);
817  } else if (h->pixel_shift) {
818  hl_decode_mb_simple_16(h);
819  } else
820  hl_decode_mb_simple_8(h);
821 }
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