summaryrefslogtreecommitdiff
path: root/libavcodec/h264_mb.c
blob: 6f3c719ce0218e47b06cea6b1a74163bed25e56c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
/*
 * H.26L/H.264/AVC/JVT/14496-10/... decoder
 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Libav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * H.264 / AVC / MPEG-4 part10 macroblock decoding
 */

#include <stdint.h>

#include "config.h"

#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "h264.h"
#include "qpeldsp.h"
#include "thread.h"

static inline int get_lowest_part_list_y(H264SliceContext *sl,
                                         int n, int height, int y_offset, int list)
{
    int raw_my             = sl->mv_cache[list][scan8[n]][1];
    int filter_height_up   = (raw_my & 3) ? 2 : 0;
    int filter_height_down = (raw_my & 3) ? 3 : 0;
    int full_my            = (raw_my >> 2) + y_offset;
    int top                = full_my - filter_height_up;
    int bottom             = full_my + filter_height_down + height;

    return FFMAX(abs(top), bottom);
}

static inline void get_lowest_part_y(const H264Context *h, H264SliceContext *sl,
                                     int refs[2][48], int n,
                                     int height, int y_offset, int list0,
                                     int list1, int *nrefs)
{
    int my;

    y_offset += 16 * (sl->mb_y >> MB_FIELD(sl));

    if (list0) {
        int ref_n = sl->ref_cache[0][scan8[n]];
        H264Ref *ref = &sl->ref_list[0][ref_n];

        // Error resilience puts the current picture in the ref list.
        // Don't try to wait on these as it will cause a deadlock.
        // Fields can wait on each other, though.
        if (ref->parent->tf.progress->data != h->cur_pic.tf.progress->data ||
            (ref->reference & 3) != h->picture_structure) {
            my = get_lowest_part_list_y(sl, n, height, y_offset, 0);
            if (refs[0][ref_n] < 0)
                nrefs[0] += 1;
            refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
        }
    }

    if (list1) {
        int ref_n    = sl->ref_cache[1][scan8[n]];
        H264Ref *ref = &sl->ref_list[1][ref_n];

        if (ref->parent->tf.progress->data != h->cur_pic.tf.progress->data ||
            (ref->reference & 3) != h->picture_structure) {
            my = get_lowest_part_list_y(sl, n, height, y_offset, 1);
            if (refs[1][ref_n] < 0)
                nrefs[1] += 1;
            refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
        }
    }
}

/**
 * Wait until all reference frames are available for MC operations.
 *
 * @param h the H.264 context
 */
static void await_references(const H264Context *h, H264SliceContext *sl)
{
    const int mb_xy   = sl->mb_xy;
    const int mb_type = h->cur_pic.mb_type[mb_xy];
    int refs[2][48];
    int nrefs[2] = { 0 };
    int ref, list;

    memset(refs, -1, sizeof(refs));

    if (IS_16X16(mb_type)) {
        get_lowest_part_y(h, sl, refs, 0, 16, 0,
                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
    } else if (IS_16X8(mb_type)) {
        get_lowest_part_y(h, sl, refs, 0, 8, 0,
                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
        get_lowest_part_y(h, sl, refs, 8, 8, 8,
                          IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
    } else if (IS_8X16(mb_type)) {
        get_lowest_part_y(h, sl, refs, 0, 16, 0,
                          IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
        get_lowest_part_y(h, sl, refs, 4, 16, 0,
                          IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
    } else {
        int i;

        assert(IS_8X8(mb_type));

        for (i = 0; i < 4; i++) {
            const int sub_mb_type = sl->sub_mb_type[i];
            const int n           = 4 * i;
            int y_offset          = (i & 2) << 2;

            if (IS_SUB_8X8(sub_mb_type)) {
                get_lowest_part_y(h, sl, refs, n, 8, y_offset,
                                  IS_DIR(sub_mb_type, 0, 0),
                                  IS_DIR(sub_mb_type, 0, 1),
                                  nrefs);
            } else if (IS_SUB_8X4(sub_mb_type)) {
                get_lowest_part_y(h, sl, refs, n, 4, y_offset,
                                  IS_DIR(sub_mb_type, 0, 0),
                                  IS_DIR(sub_mb_type, 0, 1),
                                  nrefs);
                get_lowest_part_y(h, sl, refs, n + 2, 4, y_offset + 4,
                                  IS_DIR(sub_mb_type, 0, 0),
                                  IS_DIR(sub_mb_type, 0, 1),
                                  nrefs);
            } else if (IS_SUB_4X8(sub_mb_type)) {
                get_lowest_part_y(h, sl, refs, n, 8, y_offset,
                                  IS_DIR(sub_mb_type, 0, 0),
                                  IS_DIR(sub_mb_type, 0, 1),
                                  nrefs);
                get_lowest_part_y(h, sl, refs, n + 1, 8, y_offset,
                                  IS_DIR(sub_mb_type, 0, 0),
                                  IS_DIR(sub_mb_type, 0, 1),
                                  nrefs);
            } else {
                int j;
                assert(IS_SUB_4X4(sub_mb_type));
                for (j = 0; j < 4; j++) {
                    int sub_y_offset = y_offset + 2 * (j & 2);
                    get_lowest_part_y(h, sl, refs, n + j, 4, sub_y_offset,
                                      IS_DIR(sub_mb_type, 0, 0),
                                      IS_DIR(sub_mb_type, 0, 1),
                                      nrefs);
                }
            }
        }
    }

    for (list = sl->list_count - 1; list >= 0; list--)
        for (ref = 0; ref < 48 && nrefs[list]; ref++) {
            int row = refs[list][ref];
            if (row >= 0) {
                H264Ref *ref_pic  = &sl->ref_list[list][ref];
                int ref_field         = ref_pic->reference - 1;
                int ref_field_picture = ref_pic->parent->field_picture;
                int pic_height        = 16 * h->mb_height >> ref_field_picture;

                row <<= MB_MBAFF(sl);
                nrefs[list]--;

                if (!FIELD_PICTURE(h) && ref_field_picture) { // frame referencing two fields
                    ff_thread_await_progress(&ref_pic->parent->tf,
                                             FFMIN((row >> 1) - !(row & 1),
                                                   pic_height - 1),
                                             1);
                    ff_thread_await_progress(&ref_pic->parent->tf,
                                             FFMIN((row >> 1), pic_height - 1),
                                             0);
                } else if (FIELD_PICTURE(h) && !ref_field_picture) { // field referencing one field of a frame
                    ff_thread_await_progress(&ref_pic->parent->tf,
                                             FFMIN(row * 2 + ref_field,
                                                   pic_height - 1),
                                             0);
                } else if (FIELD_PICTURE(h)) {
                    ff_thread_await_progress(&ref_pic->parent->tf,
                                             FFMIN(row, pic_height - 1),
                                             ref_field);
                } else {
                    ff_thread_await_progress(&ref_pic->parent->tf,
                                             FFMIN(row, pic_height - 1),
                                             0);
                }
            }
        }
}

static av_always_inline void mc_dir_part(const H264Context *h, H264SliceContext *sl,
                                         H264Ref *pic,
                                         int n, int square, int height,
                                         int delta, int list,
                                         uint8_t *dest_y, uint8_t *dest_cb,
                                         uint8_t *dest_cr,
                                         int src_x_offset, int src_y_offset,
                                         const qpel_mc_func *qpix_op,
                                         h264_chroma_mc_func chroma_op,
                                         int pixel_shift, int chroma_idc)
{
    const int mx      = sl->mv_cache[list][scan8[n]][0] + src_x_offset * 8;
    int my            = sl->mv_cache[list][scan8[n]][1] + src_y_offset * 8;
    const int luma_xy = (mx & 3) + ((my & 3) << 2);
    ptrdiff_t offset  = ((mx >> 2) << pixel_shift) + (my >> 2) * sl->mb_linesize;
    uint8_t *src_y    = pic->data[0] + offset;
    uint8_t *src_cb, *src_cr;
    int extra_width  = 0;
    int extra_height = 0;
    int emu = 0;
    const int full_mx    = mx >> 2;
    const int full_my    = my >> 2;
    const int pic_width  = 16 * h->mb_width;
    const int pic_height = 16 * h->mb_height >> MB_FIELD(sl);
    int ysh;

    if (mx & 7)
        extra_width -= 3;
    if (my & 7)
        extra_height -= 3;

    if (full_mx                <          0 - extra_width  ||
        full_my                <          0 - extra_height ||
        full_mx + 16 /*FIXME*/ > pic_width  + extra_width  ||
        full_my + 16 /*FIXME*/ > pic_height + extra_height) {
        h->vdsp.emulated_edge_mc(sl->edge_emu_buffer,
                                 src_y - (2 << pixel_shift) - 2 * sl->mb_linesize,
                                 sl->mb_linesize, sl->mb_linesize,
                                 16 + 5, 16 + 5 /*FIXME*/, full_mx - 2,
                                 full_my - 2, pic_width, pic_height);
        src_y = sl->edge_emu_buffer + (2 << pixel_shift) + 2 * sl->mb_linesize;
        emu   = 1;
    }

    qpix_op[luma_xy](dest_y, src_y, sl->mb_linesize); // FIXME try variable height perhaps?
    if (!square)
        qpix_op[luma_xy](dest_y + delta, src_y + delta, sl->mb_linesize);

    if (CONFIG_GRAY && h->flags & AV_CODEC_FLAG_GRAY)
        return;

    if (chroma_idc == 3 /* yuv444 */) {
        src_cb = pic->data[1] + offset;
        if (emu) {
            h->vdsp.emulated_edge_mc(sl->edge_emu_buffer,
                                     src_cb - (2 << pixel_shift) - 2 * sl->mb_linesize,
                                     sl->mb_linesize, sl->mb_linesize,
                                     16 + 5, 16 + 5 /*FIXME*/,
                                     full_mx - 2, full_my - 2,
                                     pic_width, pic_height);
            src_cb = sl->edge_emu_buffer + (2 << pixel_shift) + 2 * sl->mb_linesize;
        }
        qpix_op[luma_xy](dest_cb, src_cb, sl->mb_linesize); // FIXME try variable height perhaps?
        if (!square)
            qpix_op[luma_xy](dest_cb + delta, src_cb + delta, sl->mb_linesize);

        src_cr = pic->data[2] + offset;
        if (emu) {
            h->vdsp.emulated_edge_mc(sl->edge_emu_buffer,
                                     src_cr - (2 << pixel_shift) - 2 * sl->mb_linesize,
                                     sl->mb_linesize, sl->mb_linesize,
                                     16 + 5, 16 + 5 /*FIXME*/,
                                     full_mx - 2, full_my - 2,
                                     pic_width, pic_height);
            src_cr = sl->edge_emu_buffer + (2 << pixel_shift) + 2 * sl->mb_linesize;
        }
        qpix_op[luma_xy](dest_cr, src_cr, sl->mb_linesize); // FIXME try variable height perhaps?
        if (!square)
            qpix_op[luma_xy](dest_cr + delta, src_cr + delta, sl->mb_linesize);
        return;
    }

    ysh = 3 - (chroma_idc == 2 /* yuv422 */);
    if (chroma_idc == 1 /* yuv420 */ && MB_FIELD(sl)) {
        // chroma offset when predicting from a field of opposite parity
        my  += 2 * ((sl->mb_y & 1) - (pic->reference - 1));
        emu |= (my >> 3) < 0 || (my >> 3) + 8 >= (pic_height >> 1);
    }

    src_cb = pic->data[1] + ((mx >> 3) << pixel_shift) +
             (my >> ysh) * sl->mb_uvlinesize;
    src_cr = pic->data[2] + ((mx >> 3) << pixel_shift) +
             (my >> ysh) * sl->mb_uvlinesize;

    if (emu) {
        h->vdsp.emulated_edge_mc(sl->edge_emu_buffer, src_cb,
                                 sl->mb_uvlinesize, sl->mb_uvlinesize,
                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
        src_cb = sl->edge_emu_buffer;
    }
    chroma_op(dest_cb, src_cb, sl->mb_uvlinesize,
              height >> (chroma_idc == 1 /* yuv420 */),
              mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);

    if (emu) {
        h->vdsp.emulated_edge_mc(sl->edge_emu_buffer, src_cr,
                                 sl->mb_uvlinesize, sl->mb_uvlinesize,
                                 9, 8 * chroma_idc + 1, (mx >> 3), (my >> ysh),
                                 pic_width >> 1, pic_height >> (chroma_idc == 1 /* yuv420 */));
        src_cr = sl->edge_emu_buffer;
    }
    chroma_op(dest_cr, src_cr, sl->mb_uvlinesize, height >> (chroma_idc == 1 /* yuv420 */),
              mx & 7, (my << (chroma_idc == 2 /* yuv422 */)) & 7);
}

static av_always_inline void mc_part_std(const H264Context *h, H264SliceContext *sl,
                                         int n, int square,
                                         int height, int delta,
                                         uint8_t *dest_y, uint8_t *dest_cb,
                                         uint8_t *dest_cr,
                                         int x_offset, int y_offset,
                                         const qpel_mc_func *qpix_put,
                                         h264_chroma_mc_func chroma_put,
                                         const qpel_mc_func *qpix_avg,
                                         h264_chroma_mc_func chroma_avg,
                                         int list0, int list1,
                                         int pixel_shift, int chroma_idc)
{
    const qpel_mc_func *qpix_op   = qpix_put;
    h264_chroma_mc_func chroma_op = chroma_put;

    dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;
    if (chroma_idc == 3 /* yuv444 */) {
        dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;
        dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;
    } else if (chroma_idc == 2 /* yuv422 */) {
        dest_cb += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;
        dest_cr += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;
    } else { /* yuv420 */
        dest_cb += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;
        dest_cr += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;
    }
    x_offset += 8 * sl->mb_x;
    y_offset += 8 * (sl->mb_y >> MB_FIELD(sl));

    if (list0) {
        H264Ref *ref = &sl->ref_list[0][sl->ref_cache[0][scan8[n]]];
        mc_dir_part(h, sl, ref, n, square, height, delta, 0,
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
                    qpix_op, chroma_op, pixel_shift, chroma_idc);

        qpix_op   = qpix_avg;
        chroma_op = chroma_avg;
    }

    if (list1) {
        H264Ref *ref = &sl->ref_list[1][sl->ref_cache[1][scan8[n]]];
        mc_dir_part(h, sl, ref, n, square, height, delta, 1,
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
                    qpix_op, chroma_op, pixel_shift, chroma_idc);
    }
}

static av_always_inline void mc_part_weighted(const H264Context *h, H264SliceContext *sl,
                                              int n, int square,
                                              int height, int delta,
                                              uint8_t *dest_y, uint8_t *dest_cb,
                                              uint8_t *dest_cr,
                                              int x_offset, int y_offset,
                                              const qpel_mc_func *qpix_put,
                                              h264_chroma_mc_func chroma_put,
                                              h264_weight_func luma_weight_op,
                                              h264_weight_func chroma_weight_op,
                                              h264_biweight_func luma_weight_avg,
                                              h264_biweight_func chroma_weight_avg,
                                              int list0, int list1,
                                              int pixel_shift, int chroma_idc)
{
    int chroma_height;

    dest_y += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;
    if (chroma_idc == 3 /* yuv444 */) {
        chroma_height     = height;
        chroma_weight_avg = luma_weight_avg;
        chroma_weight_op  = luma_weight_op;
        dest_cb += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;
        dest_cr += (2 * x_offset << pixel_shift) + 2 * y_offset * sl->mb_linesize;
    } else if (chroma_idc == 2 /* yuv422 */) {
        chroma_height = height;
        dest_cb      += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;
        dest_cr      += (x_offset << pixel_shift) + 2 * y_offset * sl->mb_uvlinesize;
    } else { /* yuv420 */
        chroma_height = height >> 1;
        dest_cb      += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;
        dest_cr      += (x_offset << pixel_shift) + y_offset * sl->mb_uvlinesize;
    }
    x_offset += 8 * sl->mb_x;
    y_offset += 8 * (sl->mb_y >> MB_FIELD(sl));

    if (list0 && list1) {
        /* don't optimize for luma-only case, since B-frames usually
         * use implicit weights => chroma too. */
        uint8_t *tmp_cb = sl->bipred_scratchpad;
        uint8_t *tmp_cr = sl->bipred_scratchpad + (16 << pixel_shift);
        uint8_t *tmp_y  = sl->bipred_scratchpad + 16 * sl->mb_uvlinesize;
        int refn0       = sl->ref_cache[0][scan8[n]];
        int refn1       = sl->ref_cache[1][scan8[n]];

        mc_dir_part(h, sl, &sl->ref_list[0][refn0], n, square, height, delta, 0,
                    dest_y, dest_cb, dest_cr,
                    x_offset, y_offset, qpix_put, chroma_put,
                    pixel_shift, chroma_idc);
        mc_dir_part(h, sl, &sl->ref_list[1][refn1], n, square, height, delta, 1,
                    tmp_y, tmp_cb, tmp_cr,
                    x_offset, y_offset, qpix_put, chroma_put,
                    pixel_shift, chroma_idc);

        if (sl->pwt.use_weight == 2) {
            int weight0 = sl->pwt.implicit_weight[refn0][refn1][sl->mb_y & 1];
            int weight1 = 64 - weight0;
            luma_weight_avg(dest_y, tmp_y, sl->mb_linesize,
                            height, 5, weight0, weight1, 0);
            chroma_weight_avg(dest_cb, tmp_cb, sl->mb_uvlinesize,
                              chroma_height, 5, weight0, weight1, 0);
            chroma_weight_avg(dest_cr, tmp_cr, sl->mb_uvlinesize,
                              chroma_height, 5, weight0, weight1, 0);
        } else {
            luma_weight_avg(dest_y, tmp_y, sl->mb_linesize, height,
                            sl->pwt.luma_log2_weight_denom,
                            sl->pwt.luma_weight[refn0][0][0],
                            sl->pwt.luma_weight[refn1][1][0],
                            sl->pwt.luma_weight[refn0][0][1] +
                            sl->pwt.luma_weight[refn1][1][1]);
            chroma_weight_avg(dest_cb, tmp_cb, sl->mb_uvlinesize, chroma_height,
                              sl->pwt.chroma_log2_weight_denom,
                              sl->pwt.chroma_weight[refn0][0][0][0],
                              sl->pwt.chroma_weight[refn1][1][0][0],
                              sl->pwt.chroma_weight[refn0][0][0][1] +
                              sl->pwt.chroma_weight[refn1][1][0][1]);
            chroma_weight_avg(dest_cr, tmp_cr, sl->mb_uvlinesize, chroma_height,
                              sl->pwt.chroma_log2_weight_denom,
                              sl->pwt.chroma_weight[refn0][0][1][0],
                              sl->pwt.chroma_weight[refn1][1][1][0],
                              sl->pwt.chroma_weight[refn0][0][1][1] +
                              sl->pwt.chroma_weight[refn1][1][1][1]);
        }
    } else {
        int list     = list1 ? 1 : 0;
        int refn     = sl->ref_cache[list][scan8[n]];
        H264Ref *ref = &sl->ref_list[list][refn];
        mc_dir_part(h, sl, ref, n, square, height, delta, list,
                    dest_y, dest_cb, dest_cr, x_offset, y_offset,
                    qpix_put, chroma_put, pixel_shift, chroma_idc);

        luma_weight_op(dest_y, sl->mb_linesize, height,
                       sl->pwt.luma_log2_weight_denom,
                       sl->pwt.luma_weight[refn][list][0],
                       sl->pwt.luma_weight[refn][list][1]);
        if (sl->pwt.use_weight_chroma) {
            chroma_weight_op(dest_cb, sl->mb_uvlinesize, chroma_height,
                             sl->pwt.chroma_log2_weight_denom,
                             sl->pwt.chroma_weight[refn][list][0][0],
                             sl->pwt.chroma_weight[refn][list][0][1]);
            chroma_weight_op(dest_cr, sl->mb_uvlinesize, chroma_height,
                             sl->pwt.chroma_log2_weight_denom,
                             sl->pwt.chroma_weight[refn][list][1][0],
                             sl->pwt.chroma_weight[refn][list][1][1]);
        }
    }
}

static av_always_inline void prefetch_motion(const H264Context *h, H264SliceContext *sl,
                                             int list, int pixel_shift,
                                             int chroma_idc)
{
    /* fetch pixels for estimated mv 4 macroblocks ahead
     * optimized for 64byte cache lines */
    const int refn = sl->ref_cache[list][scan8[0]];
    if (refn >= 0) {
        const int mx  = (sl->mv_cache[list][scan8[0]][0] >> 2) + 16 * sl->mb_x + 8;
        const int my  = (sl->mv_cache[list][scan8[0]][1] >> 2) + 16 * sl->mb_y;
        uint8_t **src = sl->ref_list[list][refn].data;
        int off       = (mx << pixel_shift) +
                        (my + (sl->mb_x & 3) * 4) * sl->mb_linesize +
                        (64 << pixel_shift);
        h->vdsp.prefetch(src[0] + off, sl->linesize, 4);
        if (chroma_idc == 3 /* yuv444 */) {
            h->vdsp.prefetch(src[1] + off, sl->linesize, 4);
            h->vdsp.prefetch(src[2] + off, sl->linesize, 4);
        } else {
            off = ((mx >> 1) << pixel_shift) +
                  ((my >> 1) + (sl->mb_x & 7)) * sl->uvlinesize +
                  (64 << pixel_shift);
            h->vdsp.prefetch(src[1] + off, src[2] - src[1], 2);
        }
    }
}

static av_always_inline void xchg_mb_border(const H264Context *h, H264SliceContext *sl,
                                            uint8_t *src_y,
                                            uint8_t *src_cb, uint8_t *src_cr,
                                            int linesize, int uvlinesize,
                                            int xchg, int chroma444,
                                            int simple, int pixel_shift)
{
    int deblock_topleft;
    int deblock_top;
    int top_idx = 1;
    uint8_t *top_border_m1;
    uint8_t *top_border;

    if (!simple && FRAME_MBAFF(h)) {
        if (sl->mb_y & 1) {
            if (!MB_MBAFF(sl))
                return;
        } else {
            top_idx = MB_MBAFF(sl) ? 0 : 1;
        }
    }

    if (sl->deblocking_filter == 2) {
        deblock_topleft = h->slice_table[sl->mb_xy - 1 - h->mb_stride] == sl->slice_num;
        deblock_top     = sl->top_type;
    } else {
        deblock_topleft = (sl->mb_x > 0);
        deblock_top     = (sl->mb_y > !!MB_FIELD(sl));
    }

    src_y  -= linesize   + 1 + pixel_shift;
    src_cb -= uvlinesize + 1 + pixel_shift;
    src_cr -= uvlinesize + 1 + pixel_shift;

    top_border_m1 = sl->top_borders[top_idx][sl->mb_x - 1];
    top_border    = sl->top_borders[top_idx][sl->mb_x];

#define XCHG(a, b, xchg)                        \
    if (pixel_shift) {                          \
        if (xchg) {                             \
            AV_SWAP64(b + 0, a + 0);            \
            AV_SWAP64(b + 8, a + 8);            \
        } else {                                \
            AV_COPY128(b, a);                   \
        }                                       \
    } else if (xchg)                            \
        AV_SWAP64(b, a);                        \
    else                                        \
        AV_COPY64(b, a);

    if (deblock_top) {
        if (deblock_topleft) {
            XCHG(top_border_m1 + (8 << pixel_shift),
                 src_y - (7 << pixel_shift), 1);
        }
        XCHG(top_border + (0 << pixel_shift), src_y + (1 << pixel_shift), xchg);
        XCHG(top_border + (8 << pixel_shift), src_y + (9 << pixel_shift), 1);
        if (sl->mb_x + 1 < h->mb_width) {
            XCHG(sl->top_borders[top_idx][sl->mb_x + 1],
                 src_y + (17 << pixel_shift), 1);
        }
    }
    if (simple || !CONFIG_GRAY || !(h->flags & AV_CODEC_FLAG_GRAY)) {
        if (chroma444) {
            if (deblock_top) {
                if (deblock_topleft) {
                    XCHG(top_border_m1 + (24 << pixel_shift), src_cb - (7 << pixel_shift), 1);
                    XCHG(top_border_m1 + (40 << pixel_shift), src_cr - (7 << pixel_shift), 1);
                }
                XCHG(top_border + (16 << pixel_shift), src_cb + (1 << pixel_shift), xchg);
                XCHG(top_border + (24 << pixel_shift), src_cb + (9 << pixel_shift), 1);
                XCHG(top_border + (32 << pixel_shift), src_cr + (1 << pixel_shift), xchg);
                XCHG(top_border + (40 << pixel_shift), src_cr + (9 << pixel_shift), 1);
                if (sl->mb_x + 1 < h->mb_width) {
                    XCHG(sl->top_borders[top_idx][sl->mb_x + 1] + (16 << pixel_shift), src_cb + (17 << pixel_shift), 1);
                    XCHG(sl->top_borders[top_idx][sl->mb_x + 1] + (32 << pixel_shift), src_cr + (17 << pixel_shift), 1);
                }
            }
        } else {
            if (deblock_top) {
                if (deblock_topleft) {
                    XCHG(top_border_m1 + (16 << pixel_shift), src_cb - (7 << pixel_shift), 1);
                    XCHG(top_border_m1 + (24 << pixel_shift), src_cr - (7 << pixel_shift), 1);
                }
                XCHG(top_border + (16 << pixel_shift), src_cb + 1 + pixel_shift, 1);
                XCHG(top_border + (24 << pixel_shift), src_cr + 1 + pixel_shift, 1);
            }
        }
    }
}

static av_always_inline int dctcoef_get(int16_t *mb, int high_bit_depth,
                                        int index)
{
    if (high_bit_depth) {
        return AV_RN32A(((int32_t *)mb) + index);
    } else
        return AV_RN16A(mb + index);
}

static av_always_inline void dctcoef_set(int16_t *mb, int high_bit_depth,
                                         int index, int value)
{
    if (high_bit_depth) {
        AV_WN32A(((int32_t *)mb) + index, value);
    } else
        AV_WN16A(mb + index, value);
}

static av_always_inline void hl_decode_mb_predict_luma(const H264Context *h,
                                                       H264SliceContext *sl,
                                                       int mb_type, int simple,
                                                       int transform_bypass,
                                                       int pixel_shift,
                                                       const int *block_offset,
                                                       int linesize,
                                                       uint8_t *dest_y, int p)
{
    void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
    void (*idct_dc_add)(uint8_t *dst, int16_t *block, int stride);
    int i;
    int qscale = p == 0 ? sl->qscale : sl->chroma_qp[p - 1];
    block_offset += 16 * p;
    if (IS_INTRA4x4(mb_type)) {
        if (IS_8x8DCT(mb_type)) {
            if (transform_bypass) {
                idct_dc_add =
                idct_add    = h->h264dsp.h264_add_pixels8_clear;
            } else {
                idct_dc_add = h->h264dsp.h264_idct8_dc_add;
                idct_add    = h->h264dsp.h264_idct8_add;
            }
            for (i = 0; i < 16; i += 4) {
                uint8_t *const ptr = dest_y + block_offset[i];
                const int dir      = sl->intra4x4_pred_mode_cache[scan8[i]];
                if (transform_bypass && h->ps.sps->profile_idc == 244 && dir <= 1) {
                    h->hpc.pred8x8l_add[dir](ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);
                } else {
                    const int nnz = sl->non_zero_count_cache[scan8[i + p * 16]];
                    h->hpc.pred8x8l[dir](ptr, (sl->topleft_samples_available << i) & 0x8000,
                                         (sl->topright_samples_available << i) & 0x4000, linesize);
                    if (nnz) {
                        if (nnz == 1 && dctcoef_get(sl->mb, pixel_shift, i * 16 + p * 256))
                            idct_dc_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);
                        else
                            idct_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);
                    }
                }
            }
        } else {
            if (transform_bypass) {
                idct_dc_add  =
                idct_add     = h->h264dsp.h264_add_pixels4_clear;
            } else {
                idct_dc_add = h->h264dsp.h264_idct_dc_add;
                idct_add    = h->h264dsp.h264_idct_add;
            }
            for (i = 0; i < 16; i++) {
                uint8_t *const ptr = dest_y + block_offset[i];
                const int dir      = sl->intra4x4_pred_mode_cache[scan8[i]];

                if (transform_bypass && h->ps.sps->profile_idc == 244 && dir <= 1) {
                    h->hpc.pred4x4_add[dir](ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);
                } else {
                    uint8_t *topright;
                    int nnz, tr;
                    uint64_t tr_high;
                    if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {
                        const int topright_avail = (sl->topright_samples_available << i) & 0x8000;
                        assert(sl->mb_y || linesize <= block_offset[i]);
                        if (!topright_avail) {
                            if (pixel_shift) {
                                tr_high  = ((uint16_t *)ptr)[3 - linesize / 2] * 0x0001000100010001ULL;
                                topright = (uint8_t *)&tr_high;
                            } else {
                                tr       = ptr[3 - linesize] * 0x01010101u;
                                topright = (uint8_t *)&tr;
                            }
                        } else
                            topright = ptr + (4 << pixel_shift) - linesize;
                    } else
                        topright = NULL;

                    h->hpc.pred4x4[dir](ptr, topright, linesize);
                    nnz = sl->non_zero_count_cache[scan8[i + p * 16]];
                    if (nnz) {
                        if (nnz == 1 && dctcoef_get(sl->mb, pixel_shift, i * 16 + p * 256))
                            idct_dc_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);
                        else
                            idct_add(ptr, sl->mb + (i * 16 + p * 256 << pixel_shift), linesize);
                    }
                }
            }
        }
    } else {
        h->hpc.pred16x16[sl->intra16x16_pred_mode](dest_y, linesize);
        if (sl->non_zero_count_cache[scan8[LUMA_DC_BLOCK_INDEX + p]]) {
            if (!transform_bypass)
                h->h264dsp.h264_luma_dc_dequant_idct(sl->mb + (p * 256 << pixel_shift),
                                                     sl->mb_luma_dc[p],
                                                     h->ps.pps->dequant4_coeff[p][qscale][0]);
            else {
                static const uint8_t dc_mapping[16] = {
                     0 * 16,  1 * 16,  4 * 16,  5 * 16,
                     2 * 16,  3 * 16,  6 * 16,  7 * 16,
                     8 * 16,  9 * 16, 12 * 16, 13 * 16,
                    10 * 16, 11 * 16, 14 * 16, 15 * 16
                };
                for (i = 0; i < 16; i++)
                    dctcoef_set(sl->mb + (p * 256 << pixel_shift),
                                pixel_shift, dc_mapping[i],
                                dctcoef_get(sl->mb_luma_dc[p],
                                            pixel_shift, i));
            }
        }
    }
}

static av_always_inline void hl_decode_mb_idct_luma(const H264Context *h, H264SliceContext *sl,
                                                    int mb_type, int simple,
                                                    int transform_bypass,
                                                    int pixel_shift,
                                                    const int *block_offset,
                                                    int linesize,
                                                    uint8_t *dest_y, int p)
{
    void (*idct_add)(uint8_t *dst, int16_t *block, int stride);
    int i;
    block_offset += 16 * p;
    if (!IS_INTRA4x4(mb_type)) {
        if (IS_INTRA16x16(mb_type)) {
            if (transform_bypass) {
                if (h->ps.sps->profile_idc == 244 &&
                    (sl->intra16x16_pred_mode == VERT_PRED8x8 ||
                     sl->intra16x16_pred_mode == HOR_PRED8x8)) {
                    h->hpc.pred16x16_add[sl->intra16x16_pred_mode](dest_y, block_offset,
                                                                   sl->mb + (p * 256 << pixel_shift),
                                                                   linesize);
                } else {
                    for (i = 0; i < 16; i++)
                        if (sl->non_zero_count_cache[scan8[i + p * 16]] ||
                            dctcoef_get(sl->mb, pixel_shift, i * 16 + p * 256))
                            h->h264dsp.h264_add_pixels4_clear(dest_y + block_offset[i],
                                                              sl->mb + (i * 16 + p * 256 << pixel_shift),
                                                              linesize);
                }
            } else {
                h->h264dsp.h264_idct_add16intra(dest_y, block_offset,
                                                sl->mb + (p * 256 << pixel_shift),
                                                linesize,
                                                sl->non_zero_count_cache + p * 5 * 8);
            }
        } else if (sl->cbp & 15) {
            if (transform_bypass) {
                const int di = IS_8x8DCT(mb_type) ? 4 : 1;
                idct_add = IS_8x8DCT(mb_type) ? h->h264dsp.h264_add_pixels8_clear
                    : h->h264dsp.h264_add_pixels4_clear;
                for (i = 0; i < 16; i += di)
                    if (sl->non_zero_count_cache[scan8[i + p * 16]])
                        idct_add(dest_y + block_offset[i],
                                 sl->mb + (i * 16 + p * 256 << pixel_shift),
                                 linesize);
            } else {
                if (IS_8x8DCT(mb_type))
                    h->h264dsp.h264_idct8_add4(dest_y, block_offset,
                                               sl->mb + (p * 256 << pixel_shift),
                                               linesize,
                                               sl->non_zero_count_cache + p * 5 * 8);
                else
                    h->h264dsp.h264_idct_add16(dest_y, block_offset,
                                               sl->mb + (p * 256 << pixel_shift),
                                               linesize,
                                               sl->non_zero_count_cache + p * 5 * 8);
            }
        }
    }
}

#define BITS   8
#define SIMPLE 1
#include "h264_mb_template.c"

#undef  BITS
#define BITS   16
#include "h264_mb_template.c"

#undef  SIMPLE
#define SIMPLE 0
#include "h264_mb_template.c"

void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl)
{
    const int mb_xy   = sl->mb_xy;
    const int mb_type = h->cur_pic.mb_type[mb_xy];
    int is_complex    = CONFIG_SMALL || sl->is_complex ||
                        IS_INTRA_PCM(mb_type) || sl->qscale == 0;

    if (CHROMA444(h)) {
        if (is_complex || h->pixel_shift)
            hl_decode_mb_444_complex(h, sl);
        else
            hl_decode_mb_444_simple_8(h, sl);
    } else if (is_complex) {
        hl_decode_mb_complex(h, sl);
    } else if (h->pixel_shift) {
        hl_decode_mb_simple_16(h, sl);
    } else
        hl_decode_mb_simple_8(h, sl);
}