bitstream.c 69.5 KB
Newer Older
John Koleszar's avatar
John Koleszar committed
1
/*
2
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
John Koleszar's avatar
John Koleszar committed
3
 *
4
 *  Use of this source code is governed by a BSD-style license
5
6
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
7
 *  in the file PATENTS.  All contributing project authors may
8
 *  be found in the AUTHORS file in the root of the source tree.
John Koleszar's avatar
John Koleszar committed
9
10
11
 */


John Koleszar's avatar
John Koleszar committed
12
#include "vp8/common/header.h"
John Koleszar's avatar
John Koleszar committed
13
#include "encodemv.h"
John Koleszar's avatar
John Koleszar committed
14
15
#include "vp8/common/entropymode.h"
#include "vp8/common/findnearmv.h"
John Koleszar's avatar
John Koleszar committed
16
#include "mcomp.h"
John Koleszar's avatar
John Koleszar committed
17
#include "vp8/common/systemdependent.h"
John Koleszar's avatar
John Koleszar committed
18
19
#include <assert.h>
#include <stdio.h>
20
#include <limits.h>
John Koleszar's avatar
John Koleszar committed
21
#include "vp8/common/pragmas.h"
22
#include "vpx/vpx_encoder.h"
John Koleszar's avatar
John Koleszar committed
23
24
#include "vpx_mem/vpx_mem.h"
#include "bitstream.h"
25
26

#include "defaultcoefcounts.h"
27
28
29
30
31

#if CONFIG_SEGFEATURES
#include "vp8/common/seg_common.h"
#endif

32
33
34
#if CONFIG_SEGMENTATION
static int segment_cost = 0;
#endif
35

John Koleszar's avatar
John Koleszar committed
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
const int vp8cx_base_skip_false_prob[128] =
{
    255, 255, 255, 255, 255, 255, 255, 255,
    255, 255, 255, 255, 255, 255, 255, 255,
    255, 255, 255, 255, 255, 255, 255, 255,
    255, 255, 255, 255, 255, 255, 255, 255,
    255, 255, 255, 255, 255, 255, 255, 255,
    255, 255, 255, 255, 255, 255, 255, 255,
    255, 255, 255, 255, 255, 255, 255, 255,
    251, 248, 244, 240, 236, 232, 229, 225,
    221, 217, 213, 208, 204, 199, 194, 190,
    187, 183, 179, 175, 172, 168, 164, 160,
    157, 153, 149, 145, 142, 138, 134, 130,
    127, 124, 120, 117, 114, 110, 107, 104,
    101, 98,  95,  92,  89,  86,  83, 80,
    77,  74,  71,  68,  65,  62,  59, 56,
    53,  50,  47,  44,  41,  38,  35, 32,
    30,  28,  26,  24,  22,  20,  18, 16,
};

#if defined(SECTIONBITS_OUTPUT)
unsigned __int64 Sectionbits[500];
#endif

#ifdef ENTROPY_STATS
int intra_mode_stats[10][10][10];
62
static unsigned int tree_update_hist [BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES] [2];
63
64
65
66
#if CONFIG_T8X8
static unsigned int tree_update_hist_8x8 [BLOCK_TYPES] [COEF_BANDS] [PREV_COEF_CONTEXTS] [ENTROPY_NODES] [2];
#endif

John Koleszar's avatar
John Koleszar committed
67
68
69
70
71
extern unsigned int active_section;
#endif

#ifdef MODE_STATS
int count_mb_seg[4] = { 0, 0, 0, 0 };
72
73
74
75
#if CONFIG_SEGMENTATION
int segment_modes_intra[MAX_MB_SEGMENTS] = { 0, 0, 0, 0 };
int segment_modes_inter[MAX_MB_SEGMENTS] = { 0, 0, 0, 0 };
#endif
John Koleszar's avatar
John Koleszar committed
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
#endif


static void update_mode(
    vp8_writer *const w,
    int n,
    vp8_token tok               [/* n */],
    vp8_tree tree,
    vp8_prob Pnew               [/* n-1 */],
    vp8_prob Pcur               [/* n-1 */],
    unsigned int bct            [/* n-1 */] [2],
    const unsigned int num_events[/* n */]
)
{
    unsigned int new_b = 0, old_b = 0;
    int i = 0;

    vp8_tree_probs_from_distribution(
        n--, tok, tree,
        Pnew, bct, num_events,
        256, 1
    );

    do
    {
        new_b += vp8_cost_branch(bct[i], Pnew[i]);
        old_b += vp8_cost_branch(bct[i], Pcur[i]);
    }
    while (++i < n);

    if (new_b + (n << 8) < old_b)
    {
        int i = 0;

        vp8_write_bit(w, 1);

        do
        {
            const vp8_prob p = Pnew[i];

            vp8_write_literal(w, Pcur[i] = p ? p : 1, 8);
        }
        while (++i < n);
    }
    else
        vp8_write_bit(w, 0);
}

static void update_mbintra_mode_probs(VP8_COMP *cpi)
{
    VP8_COMMON *const x = & cpi->common;

    vp8_writer *const w = & cpi->bc;

    {
        vp8_prob Pnew   [VP8_YMODES-1];
        unsigned int bct [VP8_YMODES-1] [2];

        update_mode(
            w, VP8_YMODES, vp8_ymode_encodings, vp8_ymode_tree,
            Pnew, x->fc.ymode_prob, bct, (unsigned int *)cpi->ymode_count
        );
    }
    {
        vp8_prob Pnew   [VP8_UV_MODES-1];
        unsigned int bct [VP8_UV_MODES-1] [2];

        update_mode(
            w, VP8_UV_MODES, vp8_uv_mode_encodings, vp8_uv_mode_tree,
            Pnew, x->fc.uv_mode_prob, bct, (unsigned int *)cpi->uv_mode_count
        );
    }
}

static void write_ymode(vp8_writer *bc, int m, const vp8_prob *p)
{
    vp8_write_token(bc, vp8_ymode_tree, p, vp8_ymode_encodings + m);
}

static void kfwrite_ymode(vp8_writer *bc, int m, const vp8_prob *p)
{
    vp8_write_token(bc, vp8_kf_ymode_tree, p, vp8_kf_ymode_encodings + m);
}

Yaowu Xu's avatar
Yaowu Xu committed
160
161
162
163
164
165
#if CONFIG_I8X8
static void write_i8x8_mode(vp8_writer *bc, int m, const vp8_prob *p)
{
    vp8_write_token(bc,vp8_i8x8_mode_tree, p, vp8_i8x8_mode_encodings + m);
}
#endif
John Koleszar's avatar
John Koleszar committed
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
static void write_uv_mode(vp8_writer *bc, int m, const vp8_prob *p)
{
    vp8_write_token(bc, vp8_uv_mode_tree, p, vp8_uv_mode_encodings + m);
}


static void write_bmode(vp8_writer *bc, int m, const vp8_prob *p)
{
    vp8_write_token(bc, vp8_bmode_tree, p, vp8_bmode_encodings + m);
}

static void write_split(vp8_writer *bc, int x)
{
    vp8_write_token(
        bc, vp8_mbsplit_tree, vp8_mbsplit_probs, vp8_mbsplit_encodings + x
    );
}

static void pack_tokens_c(vp8_writer *w, const TOKENEXTRA *p, int xcount)
{
    const TOKENEXTRA *const stop = p + xcount;
    unsigned int split;
    unsigned int shift;
    int count = w->count;
    unsigned int range = w->range;
    unsigned int lowvalue = w->lowvalue;

    while (p < stop)
    {
        const int t = p->Token;
        vp8_token *const a = vp8_coef_encodings + t;
        const vp8_extra_bit_struct *const b = vp8_extra_bits + t;
        int i = 0;
        const unsigned char *pp = p->context_tree;
        int v = a->value;
        int n = a->Len;

        if (p->skip_eob_node)
        {
            n--;
            i = 2;
        }

        do
        {
            const int bb = (v >> --n) & 1;
            split = 1 + (((range - 1) * pp[i>>1]) >> 8);
            i = vp8_coef_tree[i+bb];

            if (bb)
            {
                lowvalue += split;
                range = range - split;
            }
            else
            {
                range = split;
            }

225
            shift = vp8_norm[range];
John Koleszar's avatar
John Koleszar committed
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
            range <<= shift;
            count += shift;

            if (count >= 0)
            {
                int offset = shift - count;

                if ((lowvalue << (offset - 1)) & 0x80000000)
                {
                    int x = w->pos - 1;

                    while (x >= 0 && w->buffer[x] == 0xff)
                    {
                        w->buffer[x] = (unsigned char)0;
                        x--;
                    }

                    w->buffer[x] += 1;
                }

                w->buffer[w->pos++] = (lowvalue >> (24 - offset));
                lowvalue <<= offset;
                shift = count;
                lowvalue &= 0xffffff;
                count -= 8 ;
            }

            lowvalue <<= shift;
        }
        while (n);


        if (b->base_val)
        {
            const int e = p->Extra, L = b->Len;

            if (L)
            {
                const unsigned char *pp = b->prob;
                int v = e >> 1;
                int n = L;              /* number of bits in v, assumed nonzero */
                int i = 0;

                do
                {
                    const int bb = (v >> --n) & 1;
                    split = 1 + (((range - 1) * pp[i>>1]) >> 8);
                    i = b->tree[i+bb];

                    if (bb)
                    {
                        lowvalue += split;
                        range = range - split;
                    }
                    else
                    {
                        range = split;
                    }

285
                    shift = vp8_norm[range];
John Koleszar's avatar
John Koleszar committed
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
                    range <<= shift;
                    count += shift;

                    if (count >= 0)
                    {
                        int offset = shift - count;

                        if ((lowvalue << (offset - 1)) & 0x80000000)
                        {
                            int x = w->pos - 1;

                            while (x >= 0 && w->buffer[x] == 0xff)
                            {
                                w->buffer[x] = (unsigned char)0;
                                x--;
                            }

                            w->buffer[x] += 1;
                        }

                        w->buffer[w->pos++] = (lowvalue >> (24 - offset));
                        lowvalue <<= offset;
                        shift = count;
                        lowvalue &= 0xffffff;
                        count -= 8 ;
                    }

                    lowvalue <<= shift;
                }
                while (n);
            }


            {

                split = (range + 1) >> 1;

                if (e & 1)
                {
                    lowvalue += split;
                    range = range - split;
                }
                else
                {
                    range = split;
                }

                range <<= 1;

                if ((lowvalue & 0x80000000))
                {
                    int x = w->pos - 1;

                    while (x >= 0 && w->buffer[x] == 0xff)
                    {
                        w->buffer[x] = (unsigned char)0;
                        x--;
                    }

                    w->buffer[x] += 1;

                }

                lowvalue  <<= 1;

                if (!++count)
                {
                    count = -8;
                    w->buffer[w->pos++] = (lowvalue >> 24);
                    lowvalue &= 0xffffff;
                }
            }

        }

        ++p;
    }

    w->count = count;
    w->lowvalue = lowvalue;
    w->range = range;

}

static void write_partition_size(unsigned char *cx_data, int size)
{
    signed char csize;

    csize = size & 0xff;
    *cx_data = csize;
    csize = (size >> 8) & 0xff;
    *(cx_data + 1) = csize;
    csize = (size >> 16) & 0xff;
    *(cx_data + 2) = csize;

}

static void pack_tokens_into_partitions_c(VP8_COMP *cpi, unsigned char *cx_data, int num_part, int *size)
{

    int i;
    unsigned char *ptr = cx_data;
    unsigned int shift;
    vp8_writer *w = &cpi->bc2;
    *size = 3 * (num_part - 1);
391
    cpi->partition_sz[0] += *size;
John Koleszar's avatar
John Koleszar committed
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
    ptr = cx_data + (*size);

    for (i = 0; i < num_part; i++)
    {
        vp8_start_encode(w, ptr);
        {
            unsigned int split;
            int count = w->count;
            unsigned int range = w->range;
            unsigned int lowvalue = w->lowvalue;
            int mb_row;

            for (mb_row = i; mb_row < cpi->common.mb_rows; mb_row += num_part)
            {
                TOKENEXTRA *p    = cpi->tplist[mb_row].start;
                TOKENEXTRA *stop = cpi->tplist[mb_row].stop;

                while (p < stop)
                {
                    const int t = p->Token;
                    vp8_token *const a = vp8_coef_encodings + t;
                    const vp8_extra_bit_struct *const b = vp8_extra_bits + t;
                    int i = 0;
                    const unsigned char *pp = p->context_tree;
                    int v = a->value;
                    int n = a->Len;

                    if (p->skip_eob_node)
                    {
                        n--;
                        i = 2;
                    }

                    do
                    {
                        const int bb = (v >> --n) & 1;
                        split = 1 + (((range - 1) * pp[i>>1]) >> 8);
                        i = vp8_coef_tree[i+bb];

                        if (bb)
                        {
                            lowvalue += split;
                            range = range - split;
                        }
                        else
                        {
                            range = split;
                        }

441
                        shift = vp8_norm[range];
John Koleszar's avatar
John Koleszar committed
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
                        range <<= shift;
                        count += shift;

                        if (count >= 0)
                        {
                            int offset = shift - count;

                            if ((lowvalue << (offset - 1)) & 0x80000000)
                            {
                                int x = w->pos - 1;

                                while (x >= 0 && w->buffer[x] == 0xff)
                                {
                                    w->buffer[x] = (unsigned char)0;
                                    x--;
                                }

                                w->buffer[x] += 1;
                            }

                            w->buffer[w->pos++] = (lowvalue >> (24 - offset));
                            lowvalue <<= offset;
                            shift = count;
                            lowvalue &= 0xffffff;
                            count -= 8 ;
                        }

                        lowvalue <<= shift;
                    }
                    while (n);


                    if (b->base_val)
                    {
                        const int e = p->Extra, L = b->Len;

                        if (L)
                        {
                            const unsigned char *pp = b->prob;
                            int v = e >> 1;
                            int n = L;              /* number of bits in v, assumed nonzero */
                            int i = 0;

                            do
                            {
                                const int bb = (v >> --n) & 1;
                                split = 1 + (((range - 1) * pp[i>>1]) >> 8);
                                i = b->tree[i+bb];

                                if (bb)
                                {
                                    lowvalue += split;
                                    range = range - split;
                                }
                                else
                                {
                                    range = split;
                                }

501
                                shift = vp8_norm[range];
John Koleszar's avatar
John Koleszar committed
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
                                range <<= shift;
                                count += shift;

                                if (count >= 0)
                                {
                                    int offset = shift - count;

                                    if ((lowvalue << (offset - 1)) & 0x80000000)
                                    {
                                        int x = w->pos - 1;

                                        while (x >= 0 && w->buffer[x] == 0xff)
                                        {
                                            w->buffer[x] = (unsigned char)0;
                                            x--;
                                        }

                                        w->buffer[x] += 1;
                                    }

                                    w->buffer[w->pos++] = (lowvalue >> (24 - offset));
                                    lowvalue <<= offset;
                                    shift = count;
                                    lowvalue &= 0xffffff;
                                    count -= 8 ;
                                }

                                lowvalue <<= shift;
                            }
                            while (n);
                        }

                        {
                            split = (range + 1) >> 1;

                            if (e & 1)
                            {
                                lowvalue += split;
                                range = range - split;
                            }
                            else
                            {
                                range = split;
                            }

                            range <<= 1;

                            if ((lowvalue & 0x80000000))
                            {
                                int x = w->pos - 1;

                                while (x >= 0 && w->buffer[x] == 0xff)
                                {
                                    w->buffer[x] = (unsigned char)0;
                                    x--;
                                }

                                w->buffer[x] += 1;

                            }

                            lowvalue  <<= 1;

                            if (!++count)
                            {
                                count = -8;
                                w->buffer[w->pos++] = (lowvalue >> 24);
                                lowvalue &= 0xffffff;
                            }
                        }

                    }

                    ++p;
                }
            }

            w->count    = count;
            w->lowvalue = lowvalue;
            w->range    = range;

        }

        vp8_stop_encode(w);
        *size +=   w->pos;

588
589
590
        /* The first partition size is set earlier */
        cpi->partition_sz[i + 1] = w->pos;

John Koleszar's avatar
John Koleszar committed
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
        if (i < (num_part - 1))
        {
            write_partition_size(cx_data, w->pos);
            cx_data += 3;
            ptr += w->pos;
        }
    }
}


static void pack_mb_row_tokens_c(VP8_COMP *cpi, vp8_writer *w)
{

    unsigned int split;
    int count = w->count;
    unsigned int range = w->range;
    unsigned int lowvalue = w->lowvalue;
    unsigned int shift;
    int mb_row;

    for (mb_row = 0; mb_row < cpi->common.mb_rows; mb_row++)
    {
        TOKENEXTRA *p    = cpi->tplist[mb_row].start;
        TOKENEXTRA *stop = cpi->tplist[mb_row].stop;

        while (p < stop)
        {
            const int t = p->Token;
            vp8_token *const a = vp8_coef_encodings + t;
            const vp8_extra_bit_struct *const b = vp8_extra_bits + t;
            int i = 0;
            const unsigned char *pp = p->context_tree;
            int v = a->value;
            int n = a->Len;

            if (p->skip_eob_node)
            {
                n--;
                i = 2;
            }

            do
            {
                const int bb = (v >> --n) & 1;
                split = 1 + (((range - 1) * pp[i>>1]) >> 8);
                i = vp8_coef_tree[i+bb];

                if (bb)
                {
                    lowvalue += split;
                    range = range - split;
                }
                else
                {
                    range = split;
                }

648
                shift = vp8_norm[range];
John Koleszar's avatar
John Koleszar committed
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
                range <<= shift;
                count += shift;

                if (count >= 0)
                {
                    int offset = shift - count;

                    if ((lowvalue << (offset - 1)) & 0x80000000)
                    {
                        int x = w->pos - 1;

                        while (x >= 0 && w->buffer[x] == 0xff)
                        {
                            w->buffer[x] = (unsigned char)0;
                            x--;
                        }

                        w->buffer[x] += 1;
                    }

                    w->buffer[w->pos++] = (lowvalue >> (24 - offset));
                    lowvalue <<= offset;
                    shift = count;
                    lowvalue &= 0xffffff;
                    count -= 8 ;
                }

                lowvalue <<= shift;
            }
            while (n);


            if (b->base_val)
            {
                const int e = p->Extra, L = b->Len;

                if (L)
                {
                    const unsigned char *pp = b->prob;
                    int v = e >> 1;
                    int n = L;              /* number of bits in v, assumed nonzero */
                    int i = 0;

                    do
                    {
                        const int bb = (v >> --n) & 1;
                        split = 1 + (((range - 1) * pp[i>>1]) >> 8);
                        i = b->tree[i+bb];

                        if (bb)
                        {
                            lowvalue += split;
                            range = range - split;
                        }
                        else
                        {
                            range = split;
                        }

708
                        shift = vp8_norm[range];
John Koleszar's avatar
John Koleszar committed
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
                        range <<= shift;
                        count += shift;

                        if (count >= 0)
                        {
                            int offset = shift - count;

                            if ((lowvalue << (offset - 1)) & 0x80000000)
                            {
                                int x = w->pos - 1;

                                while (x >= 0 && w->buffer[x] == 0xff)
                                {
                                    w->buffer[x] = (unsigned char)0;
                                    x--;
                                }

                                w->buffer[x] += 1;
                            }

                            w->buffer[w->pos++] = (lowvalue >> (24 - offset));
                            lowvalue <<= offset;
                            shift = count;
                            lowvalue &= 0xffffff;
                            count -= 8 ;
                        }

                        lowvalue <<= shift;
                    }
                    while (n);
                }

                {
                    split = (range + 1) >> 1;

                    if (e & 1)
                    {
                        lowvalue += split;
                        range = range - split;
                    }
                    else
                    {
                        range = split;
                    }

                    range <<= 1;

                    if ((lowvalue & 0x80000000))
                    {
                        int x = w->pos - 1;

                        while (x >= 0 && w->buffer[x] == 0xff)
                        {
                            w->buffer[x] = (unsigned char)0;
                            x--;
                        }

                        w->buffer[x] += 1;

                    }

                    lowvalue  <<= 1;

                    if (!++count)
                    {
                        count = -8;
                        w->buffer[w->pos++] = (lowvalue >> 24);
                        lowvalue &= 0xffffff;
                    }
                }

            }

            ++p;
        }
    }

    w->count = count;
    w->lowvalue = lowvalue;
    w->range = range;

}

static void write_mv_ref
(
    vp8_writer *w, MB_PREDICTION_MODE m, const vp8_prob *p
)
{
797
#if CONFIG_DEBUG
John Koleszar's avatar
John Koleszar committed
798
    assert(NEARESTMV <= m  &&  m <= SPLITMV);
799
#endif
800
801
    vp8_write_token(w, vp8_mv_ref_tree, p,
                    vp8_mv_ref_encoding_array - NEARESTMV + m);
John Koleszar's avatar
John Koleszar committed
802
803
804
805
806
807
808
}

static void write_sub_mv_ref
(
    vp8_writer *w, B_PREDICTION_MODE m, const vp8_prob *p
)
{
809
#if CONFIG_DEBUG
John Koleszar's avatar
John Koleszar committed
810
    assert(LEFT4X4 <= m  &&  m <= NEW4X4);
811
#endif
812
813
    vp8_write_token(w, vp8_sub_mv_ref_tree, p,
                    vp8_sub_mv_ref_encoding_array - LEFT4X4 + m);
John Koleszar's avatar
John Koleszar committed
814
815
816
817
}

static void write_mv
(
Scott LaVarnway's avatar
Scott LaVarnway committed
818
    vp8_writer *w, const MV *mv, const int_mv *ref, const MV_CONTEXT *mvc
John Koleszar's avatar
John Koleszar committed
819
820
821
)
{
    MV e;
Scott LaVarnway's avatar
Scott LaVarnway committed
822
823
    e.row = mv->row - ref->as_mv.row;
    e.col = mv->col - ref->as_mv.col;
John Koleszar's avatar
John Koleszar committed
824
825
826
827
828
829
830
831
832
833
834
835
836
837

    vp8_encode_motion_vector(w, &e, mvc);
}

static void write_mb_features(vp8_writer *w, const MB_MODE_INFO *mi, const MACROBLOCKD *x)
{
    // Encode the MB segment id.
    if (x->segmentation_enabled && x->update_mb_segmentation_map)
    {
        switch (mi->segment_id)
        {
        case 0:
            vp8_write(w, 0, x->mb_segment_tree_probs[0]);
            vp8_write(w, 0, x->mb_segment_tree_probs[1]);
838
#if CONFIG_SEGMENTATION
839
            segment_cost += vp8_cost_zero(x->mb_segment_tree_probs[0]) + vp8_cost_zero(x->mb_segment_tree_probs[1]);
840
#endif
John Koleszar's avatar
John Koleszar committed
841
842
843
844
            break;
        case 1:
            vp8_write(w, 0, x->mb_segment_tree_probs[0]);
            vp8_write(w, 1, x->mb_segment_tree_probs[1]);
845
#if CONFIG_SEGMENTATION
846
            segment_cost += vp8_cost_zero(x->mb_segment_tree_probs[0]) + vp8_cost_one(x->mb_segment_tree_probs[1]);
847
#endif
John Koleszar's avatar
John Koleszar committed
848
849
850
851
            break;
        case 2:
            vp8_write(w, 1, x->mb_segment_tree_probs[0]);
            vp8_write(w, 0, x->mb_segment_tree_probs[2]);
852
#if CONFIG_SEGMENTATION
853
            segment_cost += vp8_cost_one(x->mb_segment_tree_probs[0]) + vp8_cost_zero(x->mb_segment_tree_probs[2]);
854
#endif
John Koleszar's avatar
John Koleszar committed
855
856
857
858
            break;
        case 3:
            vp8_write(w, 1, x->mb_segment_tree_probs[0]);
            vp8_write(w, 1, x->mb_segment_tree_probs[2]);
859
#if CONFIG_SEGMENTATION
860
            segment_cost += vp8_cost_one(x->mb_segment_tree_probs[0]) + vp8_cost_one(x->mb_segment_tree_probs[2]);
861
#endif
John Koleszar's avatar
John Koleszar committed
862
863
864
865
866
867
            break;

            // TRAP.. This should not happen
        default:
            vp8_write(w, 0, x->mb_segment_tree_probs[0]);
            vp8_write(w, 0, x->mb_segment_tree_probs[1]);
868
#if CONFIG_SEGMENTATION
869
            segment_cost += vp8_cost_zero(x->mb_segment_tree_probs[0]) + vp8_cost_zero(x->mb_segment_tree_probs[1]);
870
#endif
John Koleszar's avatar
John Koleszar committed
871
872
873
874
875
876
877
878
879
880
881
            break;
        }
    }
}


static void pack_inter_mode_mvs(VP8_COMP *const cpi)
{
    VP8_COMMON *const pc = & cpi->common;
    vp8_writer *const w = & cpi->bc;
    const MV_CONTEXT *mvc = pc->fc.mvc;
882
    MACROBLOCKD *xd = &cpi->mb.e_mbd;
Yaowu Xu's avatar
Yaowu Xu committed
883
#if CONFIG_SEGMENTATION
884
885
    int left_id, above_id;
    int i;
886
887
    int sum;
    int index = 0;
888
#endif
John Koleszar's avatar
John Koleszar committed
889
890
891
892
893
894
895
896
897
898
899
900
901
    const int *const rfct = cpi->count_mb_ref_frame_usage;
    const int rf_intra = rfct[INTRA_FRAME];
    const int rf_inter = rfct[LAST_FRAME] + rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME];

    MODE_INFO *m = pc->mi, *ms;
    const int mis = pc->mode_info_stride;
    int mb_row = -1;

    int prob_last_coded;
    int prob_gf_coded;
    int prob_skip_false = 0;
    ms = pc->mi - 1;

902
903
    cpi->mb.partition_info = cpi->mb.pi;

John Koleszar's avatar
John Koleszar committed
904
    // Calculate the probabilities to be used to code the reference frame based on actual useage this frame
905
906
907
908
909
910
911
#if CONFIG_SEGFEATURES
    cpi->prob_intra_coded = (rf_intra + rf_inter)
                            ? rf_intra * 255 / (rf_intra + rf_inter) : 1;
#else
    cpi->prob_intra_coded = rf_intra * 255 / (rf_intra + rf_inter);
#endif
    if (!cpi->prob_intra_coded)
John Koleszar's avatar
John Koleszar committed
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
        cpi->prob_intra_coded = 1;

    prob_last_coded = rf_inter ? (rfct[LAST_FRAME] * 255) / rf_inter : 128;

    if (!prob_last_coded)
        prob_last_coded = 1;

    prob_gf_coded = (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME])
                    ? (rfct[GOLDEN_FRAME] * 255) / (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME]) : 128;

    if (!prob_gf_coded)
        prob_gf_coded = 1;


#ifdef ENTROPY_STATS
    active_section = 1;
#endif

    if (pc->mb_no_coeff_skip)
    {
932
933
934
935
936
        // Divide by 0 check. 0 case possible with segment features
        if ( (cpi->skip_false_count + cpi->skip_true_count) )
        {
            prob_skip_false = cpi->skip_false_count * 256 /
                              (cpi->skip_false_count + cpi->skip_true_count);
John Koleszar's avatar
John Koleszar committed
937

938
939
            if (prob_skip_false <= 1)
                prob_skip_false = 1;
John Koleszar's avatar
John Koleszar committed
940

941
942
943
944
            if (prob_skip_false > 255)
                prob_skip_false = 255;
        }
        else
John Koleszar's avatar
John Koleszar committed
945
946
947
948
949
950
951
952
953
954
955
956
957
            prob_skip_false = 255;

        cpi->prob_skip_false = prob_skip_false;
        vp8_write_literal(w, prob_skip_false, 8);
    }

    vp8_write_literal(w, cpi->prob_intra_coded, 8);
    vp8_write_literal(w, prob_last_coded, 8);
    vp8_write_literal(w, prob_gf_coded, 8);

    update_mbintra_mode_probs(cpi);

    vp8_write_mvprobs(cpi);
958
959
960
#if CONFIG_SEGMENTATION
    vp8_write_bit(w, (xd->temporal_update) ? 1:0);
#endif
John Koleszar's avatar
John Koleszar committed
961
962
963
964
965
966
967
968
969
    while (++mb_row < pc->mb_rows)
    {
        int mb_col = -1;

        while (++mb_col < pc->mb_cols)
        {
            const MB_MODE_INFO *const mi = & m->mbmi;
            const MV_REFERENCE_FRAME rf = mi->ref_frame;
            const MB_PREDICTION_MODE mode = mi->mode;
970
            const int segment_id = mi->segment_id;
John Koleszar's avatar
John Koleszar committed
971

972
            //MACROBLOCKD *xd = &cpi->mb.e_mbd;
John Koleszar's avatar
John Koleszar committed
973
974
975
976
977
978
979

            // Distance of Mb to the various image edges.
            // These specified to 8th pel as they are always compared to MV values that are in 1/8th pel units
            xd->mb_to_left_edge = -((mb_col * 16) << 3);
            xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3;
            xd->mb_to_top_edge = -((mb_row * 16)) << 3;
            xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
980
#if CONFIG_SEGMENTATION
981
982
            xd->up_available = (mb_row != 0);
            xd->left_available = (mb_col != 0);
983
#endif
John Koleszar's avatar
John Koleszar committed
984
985
986
987
#ifdef ENTROPY_STATS
            active_section = 9;
#endif

988
989
#ifdef MODE_STATS
#if CONFIG_SEGMENTATION
990
            segment_modes_inter[segment_id]++;
991
992
#endif
#endif
John Koleszar's avatar
John Koleszar committed
993
            if (cpi->mb.e_mbd.update_mb_segmentation_map)
994
995
            {
#if CONFIG_SEGMENTATION
996
                if (xd->temporal_update)
997
                {
998
999
1000
1001
1002
                    sum = 0;
                    if (mb_col != 0)
                        sum +=  (m-1)->mbmi.segment_flag;
                    if (mb_row != 0)
                        sum += (m-pc->mb_cols)->mbmi.segment_flag;
1003

1004
                    if (m->mbmi.segment_flag == 0)
1005
                    {
1006
1007
                        vp8_write(w,0,xd->mb_segment_tree_probs[3+sum]);
                        segment_cost += vp8_cost_zero(xd->mb_segment_tree_probs[3+sum]);
1008
1009
1010
                    }
                    else
                    {
1011
1012
1013
                        vp8_write(w,1,xd->mb_segment_tree_probs[3+sum]);
                        segment_cost += vp8_cost_one(xd->mb_segment_tree_probs[3+sum]);
                        write_mb_features(w, mi, &cpi->mb.e_mbd);
1014
                        cpi->segmentation_map[index] = segment_id;
1015
1016
1017
1018
                    }
                }
                else
                {
1019
                    write_mb_features(w, mi, &cpi->mb.e_mbd);
1020
                    cpi->segmentation_map[index] = segment_id;
1021
                }
1022
                index++;
1023
#else
John Koleszar's avatar
John Koleszar committed
1024
                write_mb_features(w, mi, &cpi->mb.e_mbd);
1025
#endif
1026
            }
John Koleszar's avatar
John Koleszar committed
1027

1028
1029
1030
1031
1032
#if CONFIG_SEGFEATURES
            if ( pc->mb_no_coeff_skip &&
                 ( !segfeature_active( xd, segment_id, SEG_LVL_EOB ) ||
                   (xd->segment_feature_data[segment_id][SEG_LVL_EOB] != 0) ) )
#else
John Koleszar's avatar
John Koleszar committed
1033
            if (pc->mb_no_coeff_skip)
1034
1035
1036
1037
#endif
            {
                vp8_encode_bool(w, mi->mb_skip_coeff, prob_skip_false);
            }
John Koleszar's avatar
John Koleszar committed
1038
1039
1040

            if (rf == INTRA_FRAME)
            {
1041
1042
#if CONFIG_SEGFEATURES
                // Is the segment coding of reference frame enabled
1043
                if ( !segfeature_active( xd, segment_id, SEG_LVL_REF_FRAME ) )
1044
1045
1046
1047
1048
#endif
                {
                    vp8_write(w, 0, cpi->prob_intra_coded);
                }

John Koleszar's avatar
John Koleszar committed
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
#ifdef ENTROPY_STATS
                active_section = 6;
#endif
                write_ymode(w, mode, pc->fc.ymode_prob);

                if (mode == B_PRED)
                {
                    int j = 0;

                    do
Scott LaVarnway's avatar
Scott LaVarnway committed
1059
                        write_bmode(w, m->bmi[j].as_mode, pc->fc.bmode_prob);
John Koleszar's avatar
John Koleszar committed
1060
1061
1062
1063
1064
1065
1066
                    while (++j < 16);
                }

                write_uv_mode(w, mi->uv_mode, pc->fc.uv_mode_prob);
            }
            else    /* inter coded */
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
1067
                int_mv best_mv;
John Koleszar's avatar
John Koleszar committed
1068
1069
                vp8_prob mv_ref_p [VP8_MVREFS-1];

1070
#if CONFIG_SEGFEATURES
1071
1072
                // Test to see if segment level coding of ref frame is enabled
                if ( !segfeature_active( xd, segment_id, SEG_LVL_REF_FRAME ) )
1073
#endif
John Koleszar's avatar
John Koleszar committed
1074
                {
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
                    vp8_write(w, 1, cpi->prob_intra_coded);

                    if (rf == LAST_FRAME)
                        vp8_write(w, 0, prob_last_coded);
                    else
                    {
                        vp8_write(w, 1, prob_last_coded);
                        vp8_write(w, (rf == GOLDEN_FRAME)
                                     ? 0 : 1, prob_gf_coded);
                    }
John Koleszar's avatar
John Koleszar committed
1085
1086
1087
                }

                {
Scott LaVarnway's avatar
Scott LaVarnway committed
1088
                    int_mv n1, n2;
John Koleszar's avatar
John Koleszar committed
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
                    int ct[4];

                    vp8_find_near_mvs(xd, m, &n1, &n2, &best_mv, ct, rf, cpi->common.ref_frame_sign_bias);
                    vp8_mv_ref_probs(mv_ref_p, ct);

#ifdef ENTROPY_STATS
                    accum_mv_refs(mode, ct);
#endif
                }

#ifdef ENTROPY_STATS
                active_section = 3;
#endif

1103
1104
#if CONFIG_SEGFEATURES
                // Is the segment coding of reference frame enabled
1105
                if ( !segfeature_active( xd, segment_id, SEG_LVL_MODE ) )
John Koleszar's avatar
John Koleszar committed
1106
1107
#endif
                {
1108
                    write_mv_ref(w, mode, mv_ref_p);
John Koleszar's avatar
John Koleszar committed
1109

1110
1111
1112
                    switch (mode)   /* new, split require MVs */
                    {
                    case NEWMV:
John Koleszar's avatar
John Koleszar committed
1113

1114
1115
1116
    #ifdef ENTROPY_STATS
                        active_section = 5;
    #endif
John Koleszar's avatar
John Koleszar committed
1117

1118
1119
1120
1121
                        write_mv(w, &mi->mv.as_mv, &best_mv, mvc);
                        break;

                    case SPLITMV:
John Koleszar's avatar
John Koleszar committed
1122
                    {
1123
                        int j = 0;
John Koleszar's avatar
John Koleszar committed
1124

1125
1126
1127
    #ifdef MODE_STATS
                        ++count_mb_seg [mi->partitioning];
    #endif
John Koleszar's avatar
John Koleszar committed
1128

1129
1130
1131
                        write_split(w, mi->partitioning);

                        do
John Koleszar's avatar
John Koleszar committed
1132
                        {
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
                            B_PREDICTION_MODE blockmode;
                            int_mv blockmv;
                            const int *const  L = vp8_mbsplits [mi->partitioning];
                            int k = -1;  /* first block in subset j */
                            int mv_contz;
                            int_mv leftmv, abovemv;

                            blockmode =  cpi->mb.partition_info->bmi[j].mode;
                            blockmv =  cpi->mb.partition_info->bmi[j].mv;
    #if CONFIG_DEBUG
                            while (j != L[++k])
                                if (k >= 16)
                                    assert(0);
    #else
                            while (j != L[++k]);
    #endif
                            leftmv.as_int = left_block_mv(m, k);
                            abovemv.as_int = above_block_mv(m, k, mis);
                            mv_contz = vp8_mv_cont(&leftmv, &abovemv);

                            write_sub_mv_ref(w, blockmode, vp8_sub_mv_ref_prob2 [mv_contz]);

                            if (blockmode == NEW4X4)
                            {
    #ifdef ENTROPY_STATS
                                active_section = 11;
    #endif
                                write_mv(w, &blockmv.as_mv, &best_mv, (const MV_CONTEXT *) mvc);
                            }
John Koleszar's avatar
John Koleszar committed
1162
                        }
1163
                        while (++j < cpi->mb.partition_info->count);
John Koleszar's avatar
John Koleszar committed
1164
1165
                    }
                    break;
1166
1167
1168
                    default:
                        break;
                    }
John Koleszar's avatar
John Koleszar committed
1169
1170
1171
1172
                }
            }

            ++m;
1173
            cpi->mb.partition_info++;
John Koleszar's avatar
John Koleszar committed
1174
1175
1176
        }

        ++m;  /* skip L prediction border */
1177
        cpi->mb.partition_info++;
John Koleszar's avatar
John Koleszar committed
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
    }
}


static void write_kfmodes(VP8_COMP *cpi)
{
    vp8_writer *const bc = & cpi->bc;
    const VP8_COMMON *const c = & cpi->common;
    /* const */
    MODE_INFO *m = c->mi;
1188
#if CONFIG_SEGMENTATION
Yaowu Xu's avatar
Yaowu Xu committed
1189
1190
    int left_id, above_id;
    int i;
1191
    int index = 0;
1192
#endif
John Koleszar's avatar
John Koleszar committed
1193
1194
1195
    int mb_row = -1;
    int prob_skip_false = 0;

1196
1197
1198
1199
#if CONFIG_SEGFEATURES
    MACROBLOCKD *xd = &cpi->mb.e_mbd;
#endif

John Koleszar's avatar
John Koleszar committed
1200
1201
    if (c->mb_no_coeff_skip)
    {
1202
1203
1204
1205
1206
        // Divide by 0 check. 0 case possible with segment features
        if ( (cpi->skip_false_count + cpi->skip_true_count) )
        {
            prob_skip_false = cpi->skip_false_count * 256 /
                              (cpi->skip_false_count + cpi->skip_true_count);
John Koleszar's avatar
John Koleszar committed
1207

1208
1209
            if (prob_skip_false <= 1)
                prob_skip_false = 1;
John Koleszar's avatar
John Koleszar committed
1210

1211
1212
1213
1214
            if (prob_skip_false > 255)
                prob_skip_false = 255;
        }
        else
John Koleszar's avatar
John Koleszar committed
1215
1216
1217
1218
1219
1220
            prob_skip_false = 255;

        cpi->prob_skip_false = prob_skip_false;
        vp8_write_literal(bc, prob_skip_false, 8);
    }

1221
1222
1223
1224
1225
1226
1227
#if CONFIG_QIMODE
    if(!c->kf_ymode_probs_update)
    {
        vp8_write_literal(bc, c->kf_ymode_probs_index, 3);
    }
#endif

John Koleszar's avatar
John Koleszar committed
1228
1229
1230
1231
1232
1233
1234
    while (++mb_row < c->mb_rows)
    {
        int mb_col = -1;

        while (++mb_col < c->mb_cols)
        {
            const int ym = m->mbmi.mode;
1235
1236
            int segment_id = m->mbmi.segment_id;

1237
1238
1239
1240
1241
#if CONFIG_SEGMENTATION
            MACROBLOCKD *xd = &cpi->mb.e_mbd;
            xd->up_available = (mb_row != 0);
            xd->left_available = (mb_col != 0);
#endif
1242
1243
#ifdef MODE_STATS
#if CONFIG_SEGMENTATION
1244
            segment_modes_intra[segment_id]++;
1245
1246
1247
#endif
#endif

John Koleszar's avatar
John Koleszar committed
1248
            if (cpi->mb.e_mbd.update_mb_segmentation_map)
1249
1250
            {
#if CONFIG_SEGMENTATION
1251

1252
                write_mb_features(bc, &m->mbmi, &cpi->mb.e_mbd);
1253
                cpi->segmentation_map[index] = segment_id;
1254
                index++;
1255
#else
1256
                write_mb_features(bc, &m->mbmi, &cpi->mb.e_mbd);
1257
1258
#endif
            }
John Koleszar's avatar
John Koleszar committed
1259

1260
1261
1262
1263
1264
#if CONFIG_SEGFEATURES
            if ( c->mb_no_coeff_skip &&
                 ( !segfeature_active( xd, segment_id, SEG_LVL_EOB ) ||
                   (xd->segment_feature_data[segment_id][SEG_LVL_EOB] != 0) ) )
#else
John Koleszar's avatar
John Koleszar committed
1265
            if (c->mb_no_coeff_skip)
1266
1267
#endif
            {
John Koleszar's avatar
John Koleszar committed
1268
                vp8_encode_bool(bc, m->mbmi.mb_skip_coeff, prob_skip_false);
1269
            }
1270
#if CONFIG_QIMODE
1271
            kfwrite_ymode(bc, ym, c->kf_ymode_prob[c->kf_ymode_probs_index]);
1272
#else
John Koleszar's avatar
John Koleszar committed
1273
            kfwrite_ymode(bc, ym, c->kf_ymode_prob);
1274
#endif
John Koleszar's avatar
John Koleszar committed
1275
1276
1277
1278
1279
1280
1281
            if (ym == B_PRED)
            {
                const int mis = c->mode_info_stride;
                int i = 0;

                do
                {
Scott LaVarnway's avatar
Scott LaVarnway committed
1282
1283
1284
                    const B_PREDICTION_MODE A = above_block_mode(m, i, mis);
                    const B_PREDICTION_MODE L = left_block_mode(m, i);
                    const int bm = m->bmi[i].as_mode;
John Koleszar's avatar
John Koleszar committed
1285
1286
1287
1288
1289
1290
1291
1292
1293

#ifdef ENTROPY_STATS
                    ++intra_mode_stats [A] [L] [bm];
#endif

                    write_bmode(bc, bm, c->kf_bmode_prob [A] [L]);
                }
                while (++i < 16);
            }
Yaowu Xu's avatar
Yaowu Xu committed
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
#if CONFIG_I8X8
            if(ym == I8X8_PRED)
            {
                write_i8x8_mode(bc, m->bmi[0].as_mode, c->i8x8_mode_prob);
                write_i8x8_mode(bc, m->bmi[2].as_mode, c->i8x8_mode_prob);
                write_i8x8_mode(bc, m->bmi[8].as_mode, c->i8x8_mode_prob);
                write_i8x8_mode(bc, m->bmi[10].as_mode, c->i8x8_mode_prob);
                m++;
            }
            else
#endif
John Koleszar's avatar
John Koleszar committed
1305
1306
            write_uv_mode(bc, (m++)->mbmi.uv_mode, c->kf_uv_mode_prob);
        }
Yaowu Xu's avatar
Yaowu Xu committed
1307
        //printf("\n");
John Koleszar's avatar
John Koleszar committed
1308
1309
1310
        m++;    // skip L prediction border
    }
}
1311
1312
1313

/* This function is used for debugging probability trees. */
static void print_prob_tree(vp8_prob
1314
     coef_probs[BLOCK_TYPES][COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES])
John Koleszar's avatar
John Koleszar committed
1315
{
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
    /* print coef probability tree */
    int i,j,k,l;
    FILE* f = fopen("enc_tree_probs.txt", "a");
    fprintf(f, "{\n");
    for (i = 0; i < BLOCK_TYPES; i++)
    {
        fprintf(f, "  {\n");
        for (j = 0; j < COEF_BANDS; j++)
        {
            fprintf(f, "    {\n");
            for (k = 0; k < PREV_COEF_CONTEXTS; k++)
            {
                fprintf(f, "      {");
1329
                for (l = 0; l < ENTROPY_NODES; l++)
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
                {
                    fprintf(f, "%3u, ",
                            (unsigned int)(coef_probs [i][j][k][l]));
                }
                fprintf(f, " }\n");
            }
            fprintf(f, "    }\n");
        }
        fprintf(f, "  }\n");
    }
    fprintf(f, "}\n");
    fclose(f);
}

static void sum_probs_over_prev_coef_context(
1345
        const unsigned int probs[PREV_COEF_CONTEXTS][MAX_ENTROPY_TOKENS],
1346
1347
1348
        unsigned int* out)
{
    int i, j;
1349
    for (i=0; i < MAX_ENTROPY_TOKENS; ++i)
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
    {
        for (j=0; j < PREV_COEF_CONTEXTS; ++j)
        {
            const int tmp = out[i];
            out[i] += probs[j][i];
            /* check for wrap */
            if (out[i] < tmp)
                out[i] = UINT_MAX;
        }
    }
}

static int prob_update_savings(const unsigned int *ct,
                                   const vp8_prob oldp, const vp8_prob newp,
                                   const vp8_prob upd)
{
    const int old_b = vp8_cost_branch(ct, oldp);
    const int new_b = vp8_cost_branch(ct, newp);
    const int update_b = 8 +
                         ((vp8_cost_one(upd) - vp8_cost_zero(upd)) >> 8);

    return old_b - new_b - update_b;
}

static int independent_coef_context_savings(VP8_COMP *cpi)
John Koleszar's avatar
John Koleszar committed
1375
{
1376
    int savings = 0;
John Koleszar's avatar
John Koleszar committed
1377
    int i = 0;
1378
1379
1380
1381
1382
1383
    do
    {
        int j = 0;
        do
        {
            int k = 0;
1384
1385
            unsigned int prev_coef_count_sum[MAX_ENTROPY_TOKENS] = {0};
            int prev_coef_savings[MAX_ENTROPY_TOKENS] = {0};
1386
1387
1388
1389
1390
1391
            /* Calculate new probabilities given the constraint that
             * they must be equal over the prev coef contexts
             */
            if (cpi->common.frame_type == KEY_FRAME)
            {
                /* Reset to default probabilities at key frames */
1392
                sum_probs_over_prev_coef_context(default_coef_counts[i][j],
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
                                                 prev_coef_count_sum);
            }
            else
            {
                sum_probs_over_prev_coef_context(cpi->coef_counts[i][j],
                                                 prev_coef_count_sum);
            }
            do
            {
                /* at every context */

                /* calc probs and branch cts for this frame only */
1405
1406
                //vp8_prob new_p           [ENTROPY_NODES];
                //unsigned int branch_ct   [ENTROPY_NODES] [2];
1407
1408
1409
1410

                int t = 0;      /* token/prob index */

                vp8_tree_probs_from_distribution(
1411
                    MAX_ENTROPY_TOKENS, vp8_coef_encodings, vp8_coef_tree,
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
                    cpi->frame_coef_probs[i][j][k],
                    cpi->frame_branch_ct [i][j][k],
                    prev_coef_count_sum,
                    256, 1);

                do
                {
                    const unsigned int *ct  = cpi->frame_branch_ct [i][j][k][t];
                    const vp8_prob newp = cpi->frame_coef_probs [i][j][k][t];
                    const vp8_prob oldp = cpi->common.fc.coef_probs [i][j][k][t];
                    const vp8_prob upd = vp8_coef_update_probs [i][j][k][t];
                    const int s = prob_update_savings(ct, oldp, newp, upd);

                    if (cpi->common.frame_type != KEY_FRAME ||
                        (cpi->common.frame_type == KEY_FRAME && newp != oldp))
                        prev_coef_savings[t] += s;
                }
1429
                while (++t < ENTROPY_NODES);
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
            }
            while (++k < PREV_COEF_CONTEXTS);
            k = 0;
            do
            {
                /* We only update probabilities if we can save bits, except
                 * for key frames where we have to update all probabilities
                 * to get the equal probabilities across the prev coef
                 * contexts.
                 */
                if (prev_coef_savings[k] > 0 ||
                    cpi->common.frame_type == KEY_FRAME)
                    savings += prev_coef_savings[k];
            }
1444
            while (++k < ENTROPY_NODES);
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
        }
        while (++j < COEF_BANDS);
    }
    while (++i < BLOCK_TYPES);
    return savings;
}

static int default_coef_context_savings(VP8_COMP *cpi)
{
    int savings = 0;
    int i = 0;
    do
    {
        int j = 0;
        do
        {
            int k = 0;
            do
            {
                /* at every context */

                /* calc probs and branch cts for this frame only */
1467
1468
                //vp8_prob new_p           [ENTROPY_NODES];
                //unsigned int branch_ct   [ENTROPY_NODES] [2];
1469
1470
1471
1472
1473

                int t = 0;      /* token/prob index */


                vp8_tree_probs_from_distribution(
1474
                    MAX_ENTROPY_TOKENS, vp8_coef_encodings, vp8_coef_tree,
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
                    cpi->frame_coef_probs [i][j][k],
                    cpi->frame_branch_ct [i][j][k],
                    cpi->coef_counts [i][j][k],
                    256, 1
                );

                do
                {
                    const unsigned int *ct  = cpi->frame_branch_ct [i][j][k][t];
                    const vp8_prob newp = cpi->frame_coef_probs [i][j][k][t];
                    const vp8_prob oldp = cpi->common.fc.coef_probs [i][j][k][t];
                    const vp8_prob upd = vp8_coef_update_probs [i][j][k][t];
                    const int s = prob_update_savings(ct, oldp, newp, upd);

                    if (s > 0)
                    {
                        savings += s;
                    }
                }
1494
                while (++t < ENTROPY_NODES);
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
            }
            while (++k < PREV_COEF_CONTEXTS);
        }
        while (++j < COEF_BANDS);
    }
    while (++i < BLOCK_TYPES);
    return savings;
}

int vp8_estimate_entropy_savings(VP8_COMP *cpi)
{
John Koleszar's avatar
John Koleszar committed
1506
    int savings = 0;
1507
    int i=0;
John Koleszar's avatar
John Koleszar committed
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518

    const int *const rfct = cpi->count_mb_ref_frame_usage;
    const int rf_intra = rfct[INTRA_FRAME];
    const int rf_inter = rfct[LAST_FRAME] + rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME];
    int new_intra, new_last, gf_last, oldtotal, newtotal;
    int ref_frame_cost[MAX_REF_FRAMES];

    vp8_clear_system_state(); //__asm emms;

    if (cpi->common.frame_type != KEY_FRAME)
    {
1519
1520
1521
1522
1523
1524
1525
#if CONFIG_SEGFEATURES
        new_intra = (rf_intra + rf_inter)
                    ? rf_intra * 255 / (rf_intra + rf_inter) : 1;
#else
        new_intra = rf_intra * 255 / (rf_intra + rf_inter);
#endif
        if (!new_intra)
John Koleszar's avatar
John Koleszar committed
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
            new_intra = 1;

        new_last = rf_inter ? (rfct[LAST_FRAME] * 255) / rf_inter : 128;

        gf_last = (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME])
                  ? (rfct[GOLDEN_FRAME] * 255) / (rfct[GOLDEN_FRAME] + rfct[ALTREF_FRAME]) : 128;

        // new costs
        ref_frame_cost[INTRA_FRAME]   = vp8_cost_zero(new_intra);
        ref_frame_cost[LAST_FRAME]    = vp8_cost_one(new_intra)
                                        + vp8_cost_zero(new_last);
        ref_frame_cost[GOLDEN_FRAME]  = vp8_cost_one(new_intra)
                                        + vp8_cost_one(new_last)
                                        + vp8_cost_zero(gf_last);
        ref_frame_cost[ALTREF_FRAME]  = vp8_cost_one(new_intra)
                                        + vp8_cost_one(new_last)
                                        + vp8_cost_one(gf_last);

        newtotal =
            rfct[INTRA_FRAME] * ref_frame_cost[INTRA_FRAME] +
            rfct[LAST_FRAME] * ref_frame_cost[LAST_FRAME] +
            rfct[GOLDEN_FRAME] * ref_frame_cost[GOLDEN_FRAME] +
            rfct[ALTREF_FRAME] * ref_frame_cost[ALTREF_FRAME];


        // old costs
        ref_frame_cost[INTRA_FRAME]   = vp8_cost_zero(cpi->prob_intra_coded);
        ref_frame_cost[LAST_FRAME]    = vp8_cost_one(cpi->prob_intra_coded)
                                        + vp8_cost_zero(cpi->prob_last_coded);
        ref_frame_cost[GOLDEN_FRAME]  = vp8_cost_one(cpi->prob_intra_coded)
                                        + vp8_cost_one(cpi->prob_last_coded)
                                        + vp8_cost_zero(cpi->prob_gf_coded);
        ref_frame_cost[ALTREF_FRAME]  = vp8_cost_one(cpi->prob_intra_coded)
                                        + vp8_cost_one(cpi->prob_last_coded)
                                        + vp8_cost_one(cpi->prob_gf_coded);

        oldtotal =
            rfct[INTRA_FRAME] * ref_frame_cost[INTRA_FRAME] +
            rfct[LAST_FRAME] * ref_frame_cost[LAST_FRAME] +
            rfct[GOLDEN_FRAME] * ref_frame_cost[GOLDEN_FRAME] +
            rfct[ALTREF_FRAME] * ref_frame_cost[ALTREF_FRAME];

        savings += (oldtotal - newtotal) / 256;
    }


1572
1573
1574
1575
    if (cpi->oxcf.error_resilient_mode & VPX_ERROR_RESILIENT_PARTITIONS)
        savings += independent_coef_context_savings(cpi);
    else
        savings += default_coef_context_savings(cpi);
John Koleszar's avatar
John Koleszar committed
1576
1577


1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
#if CONFIG_T8X8
    i = 0;
    do
    {
        int j = 0;

        do
        {
            int k = 0;

            do
            {
                /* at every context */

                /* calc probs and branch cts for this frame only */
                //vp8_prob new_p           [ENTROPY_NODES];
                //unsigned int branch_ct   [ENTROPY_NODES] [2];

                int t = 0;      /* token/prob index */

                vp8_tree_probs_from_distribution(
                    MAX_ENTROPY_TOKENS, vp8_coef_encodings, vp8_coef_tree,
                    cpi->frame_coef_probs_8x8 [i][j][k], cpi->frame_branch_ct_8x8 [i][j][k], cpi->coef_counts_8x8 [i][j][k],
                    256, 1
                );

                do
                {
                    const unsigned int *ct  = cpi->frame_branch_ct_8x8 [i][j][k][t];
                    const vp8_prob newp = cpi->frame_coef_probs_8x8 [i][j][k][t];

                    const vp8_prob old = cpi->common.fc.coef_probs_8x8 [i][j][k][t];
                    const vp8_prob upd = vp8_coef_update_probs_8x8 [i][j][k][t];

                    const int old_b = vp8_cost_branch(ct, old);
                    const int new_b = vp8_cost_branch(ct, newp);

                    const int update_b = 8 +
                                         ((vp8_cost_one(upd) - vp8_cost_zero(upd)) >> 8);

                    const int s = old_b - new_b - update_b;

                    if (s > 0)
                        savings += s;


                }
                while (++t < MAX_ENTROPY_TOKENS - 1);


            }
            while (++k < PREV_COEF_CONTEXTS);
        }
        while (++j < COEF_BANDS);
    }
    while (++i < BLOCK_TYPES);
#endif


John Koleszar's avatar
John Koleszar committed
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
    return savings;
}

static void update_coef_probs(VP8_COMP *cpi)
{
    int i = 0;
    vp8_writer *const w = & cpi->bc;
    int savings = 0;

    vp8_clear_system_state(); //__asm emms;

    do
    {
        int j = 0;

        do
        {
            int k = 0;
1655
            int prev_coef_savings[ENTROPY_NODES] = {0};
1656
1657
1658
1659
1660
            if (cpi->oxcf.error_resilient_mode & VPX_ERROR_RESILIENT_PARTITIONS)
            {
                for (k = 0; k < PREV_COEF_CONTEXTS; ++k)
                {
                    int t;      /* token/prob index */
1661
                    for (t = 0; t < ENTROPY_NODES; ++t)
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
                    {
                        const unsigned int *ct = cpi->frame_branch_ct [i][j]
                                                                      [k][t];
                        const vp8_prob newp = cpi->frame_coef_probs[i][j][k][t];
                        const vp8_prob oldp = cpi->common.fc.coef_probs[i][j]
                                                                       [k][t];
                        const vp8_prob upd = vp8_coef_update_probs[i][j][k][t];

                        prev_coef_savings[t] +=
                                prob_update_savings(ct, oldp, newp, upd);
                    }
                }
                k = 0;
            }
John Koleszar's avatar
John Koleszar committed
1676
1677
1678
1679
1680
1681
            do
            {
                //note: use result from vp8_estimate_entropy_savings, so no need to call vp8_tree_probs_from_distribution here.
                /* at every context */

                /* calc probs and branch cts for this frame only */
1682
1683
                //vp8_prob new_p           [ENTROPY_NODES];
                //unsigned int branch_ct   [ENTROPY_NODES] [2];
John Koleszar's avatar
John Koleszar committed
1684
1685
1686
1687

                int t = 0;      /* token/prob index */

                //vp8_tree_probs_from_distribution(
1688
                //    MAX_ENTROPY_TOKENS, vp8_coef_encodings, vp8_coef_tree,
John Koleszar's avatar
John Koleszar committed
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
                //    new_p, branch_ct, (unsigned int *)cpi->coef_counts [i][j][k],
                //    256, 1
                //    );

                do
                {
                    const vp8_prob newp = cpi->frame_coef_probs [i][j][k][t];

                    vp8_prob *Pold = cpi->common.fc.coef_probs [i][j][k] + t;
                    const vp8_prob upd = vp8_coef_update_probs [i][j][k][t];

1700
1701
                    int s = prev_coef_savings[t];
                    int u = 0;
John Koleszar's avatar
John Koleszar committed
1702

1703
1704
1705
1706
1707
1708
1709
                    if (!(cpi->oxcf.error_resilient_mode &
                            VPX_ERROR_RESILIENT_PARTITIONS))
                    {
                        s = prob_update_savings(
                                cpi->frame_branch_ct [i][j][k][t],
                                *Pold, newp, upd);
                    }
John Koleszar's avatar
John Koleszar committed
1710

1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
                    if (s > 0)
                        u = 1;

                    /* Force updates on key frames if the new is different,
                     * so that we can be sure we end up with equal probabilities
                     * over the prev coef contexts.
                     */
                    if ((cpi->oxcf.error_resilient_mode &
                            VPX_ERROR_RESILIENT_PARTITIONS) &&
                        cpi->common.frame_type == KEY_FRAME && newp != *Pold)
                        u = 1;
John Koleszar's avatar
John Koleszar committed
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741

                    vp8_write(w, u, upd);


#ifdef ENTROPY_STATS
                    ++ tree_update_hist [i][j][k][t] [u];
#endif

                    if (u)
                    {
                        /* send/use new probability */

                        *Pold = newp;
                        vp8_write_literal(w, newp, 8);

                        savings += s;

                    }

                }
1742
                while (++t < ENTROPY_NODES);
John Koleszar's avatar
John Koleszar committed
1743
1744
1745
1746
1747
1748
1749
1750
1751

                /* Accum token counts for generation of default statistics */
#ifdef ENTROPY_STATS
                t = 0;

                do
                {
                    context_counters [i][j][k][t] += cpi->coef_counts [i][j][k][t];
                }
1752
                while (++t < MAX_ENTROPY_TOKENS);
John Koleszar's avatar
John Koleszar committed
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762

#endif

            }
            while (++k < PREV_COEF_CONTEXTS);
        }
        while (++j < COEF_BANDS);
    }
    while (++i < BLOCK_TYPES);

Deb Mukherjee's avatar