decodemv.c 25.8 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
12
 */


#include "treereader.h"
John Koleszar's avatar
John Koleszar committed
13
14
#include "vp8/common/entropymv.h"
#include "vp8/common/entropymode.h"
John Koleszar's avatar
John Koleszar committed
15
#include "onyxd_int.h"
John Koleszar's avatar
John Koleszar committed
16
#include "vp8/common/findnearmv.h"
Scott LaVarnway's avatar
Scott LaVarnway committed
17

18
19
20
21
22
23
24
25
#if CONFIG_SEGFEATURES
#include "vp8/common/seg_common.h"
#endif

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

John Koleszar's avatar
John Koleszar committed
26
27
28
#if CONFIG_DEBUG
#include <assert.h>
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
static int vp8_read_bmode(vp8_reader *bc, const vp8_prob *p)
{
    const int i = vp8_treed_read(bc, vp8_bmode_tree, p);

    return i;
}


static int vp8_read_ymode(vp8_reader *bc, const vp8_prob *p)
{
    const int i = vp8_treed_read(bc, vp8_ymode_tree, p);

    return i;
}

static int vp8_kfread_ymode(vp8_reader *bc, const vp8_prob *p)
{
    const int i = vp8_treed_read(bc, vp8_kf_ymode_tree, p);

    return i;
}
Yaowu Xu's avatar
Yaowu Xu committed
50
51
52
53
#if CONFIG_I8X8
static int vp8_read_i8x8_mode(vp8_reader *bc, const vp8_prob *p)
{
    const int i = vp8_treed_read(bc, vp8_i8x8_mode_tree, p);
Scott LaVarnway's avatar
Scott LaVarnway committed
54

Yaowu Xu's avatar
Yaowu Xu committed
55
56
57
    return i;
}
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
58
59
60
61
62
63
64
65
66
67
68


static int vp8_read_uv_mode(vp8_reader *bc, const vp8_prob *p)
{
    const int i = vp8_treed_read(bc, vp8_uv_mode_tree, p);

    return i;
}

static void vp8_read_mb_features(vp8_reader *r, MB_MODE_INFO *mi, MACROBLOCKD *x)
{
69
    /* Is segmentation enabled */
Scott LaVarnway's avatar
Scott LaVarnway committed
70
71
    if (x->segmentation_enabled && x->update_mb_segmentation_map)
    {
72
        /* If so then read the segment id. */
Scott LaVarnway's avatar
Scott LaVarnway committed
73
74
75
76
77
78
        if (vp8_read(r, x->mb_segment_tree_probs[0]))
            mi->segment_id = (unsigned char)(2 + vp8_read(r, x->mb_segment_tree_probs[2]));
        else
            mi->segment_id = (unsigned char)(vp8_read(r, x->mb_segment_tree_probs[1]));
    }
}
Yaowu Xu's avatar
Yaowu Xu committed
79
extern const int vp8_i8x8_block[4];
Scott LaVarnway's avatar
Scott LaVarnway committed
80
81
82
83
84
85
86
87
static void vp8_kfread_modes(VP8D_COMP *pbi, MODE_INFO *m, int mb_row, int mb_col)
{
    vp8_reader *const bc = & pbi->bc;
    const int mis = pbi->common.mode_info_stride;

        {
            MB_PREDICTION_MODE y_mode;

88
89
90
            /* Read the Macroblock segmentation map if it is being updated explicitly this frame (reset to 0 above by default)
             * By default on a key frame reset all MBs to segment 0
             */
Scott LaVarnway's avatar
Scott LaVarnway committed
91
92
93
94
95
            m->mbmi.segment_id = 0;

            if (pbi->mb.update_mb_segmentation_map)
                vp8_read_mb_features(bc, &m->mbmi, &pbi->mb);

96
97
98
99
100
101
102
103
104
#if CONFIG_SEGFEATURES
            if ( pbi->common.mb_no_coeff_skip &&
                 ( !segfeature_active( &pbi->mb,
                                       m->mbmi.segment_id, SEG_LVL_EOB ) ||
                   (pbi->mb.segment_feature_data[m->mbmi.segment_id]
                                                [SEG_LVL_EOB] != 0) ) )
#else
            // Read the macroblock coeff skip flag if this feature is in use,
            // else default to 0
Scott LaVarnway's avatar
Scott LaVarnway committed
105
            if (pbi->common.mb_no_coeff_skip)
106
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
107
108
                m->mbmi.mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
            else
109
110
111
112
113
114
115
116
117
118
119
120
121
122
            {
#if CONFIG_SEGFEATURES
                if ( segfeature_active( &pbi->mb,
                                        m->mbmi.segment_id, SEG_LVL_EOB ) &&
                     (pbi->mb.segment_feature_data[m->mbmi.segment_id]
                                                  [SEG_LVL_EOB] == 0) )
                {
                    m->mbmi.mb_skip_coeff = 1;
                }
                else
#endif
                    m->mbmi.mb_skip_coeff = 0;
            }

123
124
#if CONFIG_QIMODE
            y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc,
125
                pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]);
126
#else
Scott LaVarnway's avatar
Scott LaVarnway committed
127
            y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc, pbi->common.kf_ymode_prob);
128
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
129
130
131
132
133
134
135
            m->mbmi.ref_frame = INTRA_FRAME;

            if ((m->mbmi.mode = y_mode) == B_PRED)
            {
                int i = 0;
                do
                {
Scott LaVarnway's avatar
Scott LaVarnway committed
136
137
                    const B_PREDICTION_MODE A = above_block_mode(m, i, mis);
                    const B_PREDICTION_MODE L = left_block_mode(m, i);
Scott LaVarnway's avatar
Scott LaVarnway committed
138

Scott LaVarnway's avatar
Scott LaVarnway committed
139
                    m->bmi[i].as_mode = (B_PREDICTION_MODE) vp8_read_bmode(bc, pbi->common.kf_bmode_prob [A] [L]);
Scott LaVarnway's avatar
Scott LaVarnway committed
140
141
142
                }
                while (++i < 16);
            }
Yaowu Xu's avatar
Yaowu Xu committed
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
#if CONFIG_I8X8
            if((m->mbmi.mode = y_mode) == I8X8_PRED)
            {
                int i;
                int mode8x8;
                //printf("F%3d:%d:%d:", pbi->common.current_video_frame, mb_row, mb_col);
                for(i=0;i<4;i++)
                 {
                     int ib = vp8_i8x8_block[i];
                     mode8x8 = vp8_read_i8x8_mode(bc, pbi->common.i8x8_mode_prob);
                     m->bmi[ib+0].as_mode= mode8x8;
                     m->bmi[ib+1].as_mode= mode8x8;
                     m->bmi[ib+4].as_mode= mode8x8;
                     m->bmi[ib+5].as_mode= mode8x8;
                 }
                //printf("%2d%2d%2d%2d\n", m->bmi[0].as_mode,m->bmi[2].as_mode,
                //                       m->bmi[8].as_mode,m->bmi[10].as_mode);
           }
            else
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
163
164
165
            m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, pbi->common.kf_uv_mode_prob);
        }
}
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
225
226
227
228
229
230
231
232

static int read_mvcomponent(vp8_reader *r, const MV_CONTEXT *mvc)
{
    const vp8_prob *const p = (const vp8_prob *) mvc;
    int x = 0;

    if (vp8_read(r, p [mvpis_short]))  /* Large */
    {
        int i = 0;

        do
        {
            x += vp8_read(r, p [MVPbits + i]) << i;
        }
        while (++i < 3);

        i = mvlong_width - 1;  /* Skip bit 3, which is sometimes implicit */

        do
        {
            x += vp8_read(r, p [MVPbits + i]) << i;
        }
        while (--i > 3);

        if (!(x & 0xFFF0)  ||  vp8_read(r, p [MVPbits + 3]))
            x += 8;
    }
    else   /* small */
        x = vp8_treed_read(r, vp8_small_mvtree, p + MVPshort);

    if (x  &&  vp8_read(r, p [MVPsign]))
        x = -x;

    return x;
}

static void read_mv(vp8_reader *r, MV *mv, const MV_CONTEXT *mvc)
{
    mv->row = (short)(read_mvcomponent(r,   mvc) << 1);
    mv->col = (short)(read_mvcomponent(r, ++mvc) << 1);
}


static void read_mvcontexts(vp8_reader *bc, MV_CONTEXT *mvc)
{
    int i = 0;

    do
    {
        const vp8_prob *up = vp8_mv_update_probs[i].prob;
        vp8_prob *p = (vp8_prob *)(mvc + i);
        vp8_prob *const pstop = p + MVPcount;

        do
        {
            if (vp8_read(bc, *up++))
            {
                const vp8_prob x = (vp8_prob)vp8_read_literal(bc, 7);

                *p = x ? x << 1 : 1;
            }
        }
        while (++p < pstop);
    }
    while (++i < 2);
}

233
234
// Read the referncence frame
static MV_REFERENCE_FRAME read_ref_frame( VP8D_COMP *pbi,
Paul Wilkins's avatar
Paul Wilkins committed
235
                                          vp8_reader *const bc,
236
237
238
                                          unsigned char segment_id )
{
    MV_REFERENCE_FRAME ref_frame;
Paul Wilkins's avatar
Paul Wilkins committed
239
    int seg_ref_active;
240
241
242
243

#if CONFIG_SEGFEATURES
    MACROBLOCKD *const xd = &pbi->mb;

Paul Wilkins's avatar
Paul Wilkins committed
244
245
246
247
248
    seg_ref_active = segfeature_active( xd,
                                        segment_id,
                                        SEG_LVL_REF_FRAME );
#else
    seg_ref_active = 0;
249
250
#endif

Paul Wilkins's avatar
Paul Wilkins committed
251
252
    // Segment reference frame features not available
    if ( !seg_ref_active )
253
254
255
256
257
258
259
260
261
262
263
264
265
266
    {
        ref_frame =
            (MV_REFERENCE_FRAME) vp8_read(bc, pbi->prob_intra);

        if (ref_frame)
        {
            if (vp8_read(bc, pbi->prob_last))
            {
                ref_frame = (MV_REFERENCE_FRAME)((int)ref_frame +
                            (int)(1 + vp8_read(bc, pbi->prob_gf)));
            }
        }
    }

Paul Wilkins's avatar
Paul Wilkins committed
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
#if CONFIG_SEGFEATURES
    // Segment reference frame features are enabled
    else
    {
        // If there are no inter reference frames enabled we can set INTRA
        if ( !check_segref_inter(xd, segment_id) )
        {
            ref_frame = INTRA_FRAME;
        }
        else
        {
            // Else if there are both intra and inter options we need to read
            // the inter / intra flag, else mark as inter.
            if ( check_segref( xd, segment_id, INTRA_FRAME ) )
                ref_frame = (MV_REFERENCE_FRAME) vp8_read(bc, pbi->prob_intra);
            else
                ref_frame = 1;      // note this unchanged = LAST

            if ( ref_frame )
            {
                // Now consider last vs (golden or alt) flag....
                // If Last is not enabled
                if ( !check_segref( xd, segment_id, LAST_FRAME ) )
                {
                    // If not golden then it must be altref
                    if (!check_segref( xd, segment_id, GOLDEN_FRAME ))
                    {
                        ref_frame = ALTREF_FRAME;
                    }
                    // Not Altref therefore must be Golden
                    else if (!check_segref( xd, segment_id,
                                               ALTREF_FRAME ))
                    {
                        ref_frame = GOLDEN_FRAME;
                    }
                    // Else we must read bit to decide.
                    else
                    {
                        ref_frame = (MV_REFERENCE_FRAME)((int)ref_frame +
                                    (int)(1 + vp8_read(bc, pbi->prob_gf)));
                    }
                }
                // Both last and at least one of alt or golden are enabled
                else if ( check_segref( xd, segment_id, GOLDEN_FRAME ) ||
                          check_segref( xd, segment_id, ALTREF_FRAME ) )
                {
                    // Read flag to indicate (golden or altref) vs last
                    if (vp8_read(bc, pbi->prob_last))
                    {
                        // If not golden then it must be altref
                        if (!check_segref( xd, segment_id, GOLDEN_FRAME ))
                        {
                            ref_frame = ALTREF_FRAME;
                        }
                        // Not Altref therefore must be Golden
                        else if (!check_segref( xd, segment_id,
                                                   ALTREF_FRAME ))
                        {
                            ref_frame = GOLDEN_FRAME;
                        }
                        else
                        {
                            ref_frame = (MV_REFERENCE_FRAME)((int)ref_frame +
                                        (int)(1 + vp8_read(bc, pbi->prob_gf)));
                        }
                    }
                    // ELSE LAST
                }
            }
        }
    }
#endif

340
341
    return (MV_REFERENCE_FRAME)ref_frame;
}
John Koleszar's avatar
John Koleszar committed
342
343
344
345
346
347
348
349

static MB_PREDICTION_MODE read_mv_ref(vp8_reader *bc, const vp8_prob *p)
{
    const int i = vp8_treed_read(bc, vp8_mv_ref_tree, p);

    return (MB_PREDICTION_MODE)i;
}

350
static B_PREDICTION_MODE sub_mv_ref(vp8_reader *bc, const vp8_prob *p)
John Koleszar's avatar
John Koleszar committed
351
352
353
{
    const int i = vp8_treed_read(bc, vp8_sub_mv_ref_tree, p);

354
    return (B_PREDICTION_MODE)i;
John Koleszar's avatar
John Koleszar committed
355
}
Scott LaVarnway's avatar
Scott LaVarnway committed
356
357

#ifdef VPX_MODE_COUNT
John Koleszar's avatar
John Koleszar committed
358
359
360
361
362
363
364
365
unsigned int vp8_mv_cont_count[5][4] =
{
    { 0, 0, 0, 0 },
    { 0, 0, 0, 0 },
    { 0, 0, 0, 0 },
    { 0, 0, 0, 0 },
    { 0, 0, 0, 0 }
};
Scott LaVarnway's avatar
Scott LaVarnway committed
366
#endif
John Koleszar's avatar
John Koleszar committed
367

368
369
static const unsigned char mbsplit_fill_count[4] = {8, 8, 4, 1};
static const unsigned char mbsplit_fill_offset[4][16] = {
Scott LaVarnway's avatar
Scott LaVarnway committed
370
371
372
373
374
    { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15},
    { 0,  1,  4,  5,  8,  9, 12, 13,  2,  3,   6,  7, 10, 11, 14, 15},
    { 0,  1,  4,  5,  2,  3,  6,  7,  8,  9,  12, 13, 10, 11, 14, 15},
    { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15}
};
John Koleszar's avatar
John Koleszar committed
375
376
377



378
static void mb_mode_mv_init(VP8D_COMP *pbi)
Scott LaVarnway's avatar
Scott LaVarnway committed
379
380
381
{
    vp8_reader *const bc = & pbi->bc;
    MV_CONTEXT *const mvc = pbi->common.fc.mvc;
382
#if CONFIG_SEGMENTATION
383
    MACROBLOCKD *const xd  = & pbi->mb;
384
#endif
John Koleszar's avatar
John Koleszar committed
385

386
387
388
389
390
391
#if CONFIG_ERROR_CONCEALMENT
    /* Default is that no macroblock is corrupt, therefore we initialize
     * mvs_corrupt_from_mb to something very big, which we can be sure is
     * outside the frame. */
    pbi->mvs_corrupt_from_mb = UINT_MAX;
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
392
393
394
    pbi->prob_skip_false = 0;
    if (pbi->common.mb_no_coeff_skip)
        pbi->prob_skip_false = (vp8_prob)vp8_read_literal(bc, 8);
John Koleszar's avatar
John Koleszar committed
395

Scott LaVarnway's avatar
Scott LaVarnway committed
396
    if(pbi->common.frame_type != KEY_FRAME)
John Koleszar's avatar
John Koleszar committed
397
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
398
399
400
        pbi->prob_intra = (vp8_prob)vp8_read_literal(bc, 8);
        pbi->prob_last  = (vp8_prob)vp8_read_literal(bc, 8);
        pbi->prob_gf    = (vp8_prob)vp8_read_literal(bc, 8);
John Koleszar's avatar
John Koleszar committed
401

Scott LaVarnway's avatar
Scott LaVarnway committed
402
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
403
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
404
            int i = 0;
John Koleszar's avatar
John Koleszar committed
405

Scott LaVarnway's avatar
Scott LaVarnway committed
406
407
408
409
410
411
            do
            {
                pbi->common.fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
            }
            while (++i < 4);
        }
John Koleszar's avatar
John Koleszar committed
412

Scott LaVarnway's avatar
Scott LaVarnway committed
413
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
414
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
415
416
417
418
419
420
421
            int i = 0;

            do
            {
                pbi->common.fc.uv_mode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
            }
            while (++i < 3);
John Koleszar's avatar
John Koleszar committed
422
423
        }

Scott LaVarnway's avatar
Scott LaVarnway committed
424
        read_mvcontexts(bc, mvc);
425
426
427
#if CONFIG_SEGMENTATION
    xd->temporal_update = vp8_read_bit(bc);
#endif
John Koleszar's avatar
John Koleszar committed
428
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
429
}
John Koleszar's avatar
John Koleszar committed
430

431

432
static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi,
Scott LaVarnway's avatar
Scott LaVarnway committed
433
434
435
436
437
                            int mb_row, int mb_col)
{
    vp8_reader *const bc = & pbi->bc;
    MV_CONTEXT *const mvc = pbi->common.fc.mvc;
    const int mis = pbi->common.mode_info_stride;
438
    MACROBLOCKD *const xd  = & pbi->mb;
439
440

#if CONFIG_SEGMENTATION
441
442
443
    int sum;
    int index = mb_row * pbi->common.mb_cols + mb_col;
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
444
    int_mv *const mv = & mbmi->mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
445
446
447
448
449
    int mb_to_left_edge;
    int mb_to_right_edge;
    int mb_to_top_edge;
    int mb_to_bottom_edge;

450
451
    mb_to_top_edge = xd->mb_to_top_edge;
    mb_to_bottom_edge = xd->mb_to_bottom_edge;
Scott LaVarnway's avatar
Scott LaVarnway committed
452
453
454
    mb_to_top_edge -= LEFT_TOP_MARGIN;
    mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
    mbmi->need_to_clamp_mvs = 0;
455
456
457
    /* 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
     */
458
    xd->mb_to_left_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
459
460
461
    mb_to_left_edge = -((mb_col * 16) << 3);
    mb_to_left_edge -= LEFT_TOP_MARGIN;

462
    xd->mb_to_right_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
463
464
465
    mb_to_right_edge = ((pbi->common.mb_cols - 1 - mb_col) * 16) << 3;
    mb_to_right_edge += RIGHT_BOTTOM_MARGIN;

466
    /* If required read in new segmentation data for this MB */
467
    if (xd->update_mb_segmentation_map)
468
469
            {
#if CONFIG_SEGMENTATION
470
471
472
                if (xd->temporal_update)
                {
                    sum = 0;
473

474
475
476
                    if (mb_col != 0)
                        sum += (mi-1)->mbmi.segment_flag;
                    if (mb_row != 0)
477
                        sum += (mi-pbi->common.mb_cols)->mbmi.segment_flag;
478

479
                    if (vp8_read(bc, xd->mb_segment_tree_probs[3+sum]) == 0)
480
                    {
481
482
                        mbmi->segment_id = pbi->segmentation_map[index];
                        mbmi->segment_flag = 0;
483
                    }
484
485
                    else
                    {
486
                        vp8_read_mb_features(bc, &mi->mbmi, xd);
487
488
489
490
                        mbmi->segment_flag = 1;
                        pbi->segmentation_map[index] = mbmi->segment_id;
                    }

491
492
493
                }
                else
                {
494
                    vp8_read_mb_features(bc, &mi->mbmi, xd);
495
                    pbi->segmentation_map[index] = mbmi->segment_id;
496
                }
497
                index++;
498
#else
499
                vp8_read_mb_features(bc, &mi->mbmi, xd);
500
501
#endif
            }
John Koleszar's avatar
John Koleszar committed
502

503
504
505
506
507
508
509
#if CONFIG_SEGFEATURES
    if ( pbi->common.mb_no_coeff_skip &&
         ( !segfeature_active( xd,
                               mbmi->segment_id, SEG_LVL_EOB ) ||
           (xd->segment_feature_data[mbmi->segment_id]
                                    [SEG_LVL_EOB] != 0) ) )
#else
Scott LaVarnway's avatar
Scott LaVarnway committed
510
    if (pbi->common.mb_no_coeff_skip)
511
512
513
514
#endif
    {
        // Read the macroblock coeff skip flag if this feature is in use,
        // else default to 0
Scott LaVarnway's avatar
Scott LaVarnway committed
515
        mbmi->mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
516
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
517
    else
518
519
520
521
522
523
524
525
526
527
528
529
530
    {
#if CONFIG_SEGFEATURES
        if ( segfeature_active( xd,
                                mbmi->segment_id, SEG_LVL_EOB ) &&
             (xd->segment_feature_data[mbmi->segment_id]
                                      [SEG_LVL_EOB] == 0) )
        {
            mbmi->mb_skip_coeff = 1;
        }
        else
#endif
            mbmi->mb_skip_coeff = 0;
    }
John Koleszar's avatar
John Koleszar committed
531

532
    // Read the reference frame
Paul Wilkins's avatar
Paul Wilkins committed
533
    mbmi->ref_frame = read_ref_frame( pbi, bc, mbmi->segment_id );
534
535
536

    // If reference frame is an Inter frame
    if (mbmi->ref_frame)
John Koleszar's avatar
John Koleszar committed
537
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
538
        int rct[4];
Scott LaVarnway's avatar
Scott LaVarnway committed
539
        int_mv nearest, nearby, best_mv;
540
        vp8_prob mv_ref_p [VP8_MVREFS-1];
John Koleszar's avatar
John Koleszar committed
541

542
543
544
545
546
547
        vp8_find_near_mvs(xd, mi, &nearest, &nearby, &best_mv, rct,
                          mbmi->ref_frame, pbi->common.ref_frame_sign_bias);
        vp8_mv_ref_probs(mv_ref_p, rct);

#if CONFIG_SEGFEATURES
        // Is the segment level mode feature enabled for this segment
548
        if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
John Koleszar's avatar
John Koleszar committed
549
        {
550
551
            mbmi->mode =
                xd->segment_feature_data[mbmi->segment_id][SEG_LVL_MODE];
John Koleszar's avatar
John Koleszar committed
552
        }
553
554
555
556
557
558
559
        else
        {
            mbmi->mode = read_mv_ref(bc, mv_ref_p);
        }
#else
        mbmi->mode = read_mv_ref(bc, mv_ref_p);
#endif
John Koleszar's avatar
John Koleszar committed
560

Scott LaVarnway's avatar
Scott LaVarnway committed
561
        mbmi->uv_mode = DC_PRED;
562
        switch (mbmi->mode)
John Koleszar's avatar
John Koleszar committed
563
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
564
565
566
567
568
569
        case SPLITMV:
        {
            const int s = mbmi->partitioning =
                      vp8_treed_read(bc, vp8_mbsplit_tree, vp8_mbsplit_probs);
            const int num_p = vp8_mbsplit_count [s];
            int j = 0;
John Koleszar's avatar
John Koleszar committed
570

Scott LaVarnway's avatar
Scott LaVarnway committed
571
572
            do  /* for each subset j */
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
573
                int_mv leftmv, abovemv;
Scott LaVarnway's avatar
Scott LaVarnway committed
574
                int_mv blockmv;
Scott LaVarnway's avatar
Scott LaVarnway committed
575
576
577
                int k;  /* first block in subset j */
                int mv_contz;
                k = vp8_mbsplit_offset[s][j];
John Koleszar's avatar
John Koleszar committed
578

Scott LaVarnway's avatar
Scott LaVarnway committed
579
580
                leftmv.as_int = left_block_mv(mi, k);
                abovemv.as_int = above_block_mv(mi, k, mis);
581
                mv_contz = vp8_mv_cont(&leftmv, &abovemv);
John Koleszar's avatar
John Koleszar committed
582

583
                switch (sub_mv_ref(bc, vp8_sub_mv_ref_prob2 [mv_contz])) /*pc->fc.sub_mv_ref_prob))*/
John Koleszar's avatar
John Koleszar committed
584
                {
Scott LaVarnway's avatar
Scott LaVarnway committed
585
                case NEW4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
586
587
588
                    read_mv(bc, &blockmv.as_mv, (const MV_CONTEXT *) mvc);
                    blockmv.as_mv.row += best_mv.as_mv.row;
                    blockmv.as_mv.col += best_mv.as_mv.col;
Scott LaVarnway's avatar
Scott LaVarnway committed
589
590
591
592
593
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][3]++;
  #endif
                    break;
                case LEFT4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
594
                    blockmv.as_int = leftmv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
595
596
597
598
599
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][0]++;
  #endif
                    break;
                case ABOVE4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
600
                    blockmv.as_int = abovemv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
601
602
603
604
605
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][1]++;
  #endif
                    break;
                case ZERO4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
606
                    blockmv.as_int = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
607
608
609
610
611
612
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][2]++;
  #endif
                    break;
                default:
                    break;
John Koleszar's avatar
John Koleszar committed
613
614
                }

Scott LaVarnway's avatar
Scott LaVarnway committed
615
                mbmi->need_to_clamp_mvs = vp8_check_mv_bounds(&blockmv,
Scott LaVarnway's avatar
Scott LaVarnway committed
616
617
618
619
                                                          mb_to_left_edge,
                                                          mb_to_right_edge,
                                                          mb_to_top_edge,
                                                          mb_to_bottom_edge);
John Koleszar's avatar
John Koleszar committed
620
621

                {
Scott LaVarnway's avatar
Scott LaVarnway committed
622
623
624
                    /* Fill (uniform) modes, mvs of jth subset.
                     Must do it here because ensuing subsets can
                     refer back to us via "left" or "above". */
625
626
                    const unsigned char *fill_offset;
                    unsigned int fill_count = mbsplit_fill_count[s];
John Koleszar's avatar
John Koleszar committed
627

628
                    fill_offset = &mbsplit_fill_offset[s][(unsigned char)j * mbsplit_fill_count[s]];
John Koleszar's avatar
John Koleszar committed
629

Scott LaVarnway's avatar
Scott LaVarnway committed
630
                    do {
Scott LaVarnway's avatar
Scott LaVarnway committed
631
                        mi->bmi[ *fill_offset].mv.as_int = blockmv.as_int;
632
                        fill_offset++;
Scott LaVarnway's avatar
Scott LaVarnway committed
633
                    }while (--fill_count);
John Koleszar's avatar
John Koleszar committed
634
635
636
                }

            }
Scott LaVarnway's avatar
Scott LaVarnway committed
637
638
            while (++j < num_p);
        }
John Koleszar's avatar
John Koleszar committed
639

Scott LaVarnway's avatar
Scott LaVarnway committed
640
        mv->as_int = mi->bmi[15].mv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
641
642
643
644

        break;  /* done with SPLITMV */

        case NEARMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
645
            mv->as_int = nearby.as_int;
646
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
647
648
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
649
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
650
651

        case NEARESTMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
652
            mv->as_int = nearest.as_int;
653
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
654
655
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
656
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
657
658

        case ZEROMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
659
            mv->as_int = 0;
660
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
661
662

        case NEWMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
663
664
665
            read_mv(bc, &mv->as_mv, (const MV_CONTEXT *) mvc);
            mv->as_mv.row += best_mv.as_mv.row;
            mv->as_mv.col += best_mv.as_mv.col;
Scott LaVarnway's avatar
Scott LaVarnway committed
666
667
668
669
670
671

            /* Don't need to check this on NEARMV and NEARESTMV modes
             * since those modes clamp the MV. The NEWMV mode does not,
             * so signal to the prediction stage whether special
             * handling may be required.
             */
Scott LaVarnway's avatar
Scott LaVarnway committed
672
673
674
675
676
            mbmi->need_to_clamp_mvs = vp8_check_mv_bounds(mv,
                                                      mb_to_left_edge,
                                                      mb_to_right_edge,
                                                      mb_to_top_edge,
                                                      mb_to_bottom_edge);
677

678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
        propagate_mv:  /* same MV throughout */
#if CONFIG_ERROR_CONCEALMENT
            if(pbi->ec_enabled)
            {
                mi->bmi[ 0].mv.as_int =
                mi->bmi[ 1].mv.as_int =
                mi->bmi[ 2].mv.as_int =
                mi->bmi[ 3].mv.as_int =
                mi->bmi[ 4].mv.as_int =
                mi->bmi[ 5].mv.as_int =
                mi->bmi[ 6].mv.as_int =
                mi->bmi[ 7].mv.as_int =
                mi->bmi[ 8].mv.as_int =
                mi->bmi[ 9].mv.as_int =
                mi->bmi[10].mv.as_int =
                mi->bmi[11].mv.as_int =
                mi->bmi[12].mv.as_int =
                mi->bmi[13].mv.as_int =
                mi->bmi[14].mv.as_int =
                mi->bmi[15].mv.as_int = mv->as_int;
            }
#endif
            break;
Scott LaVarnway's avatar
Scott LaVarnway committed
701
702
703
704
705
706
707
708
        default:;
  #if CONFIG_DEBUG
            assert(0);
  #endif
        }
    }
    else
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
709
710
        /* required for left and above block mv */
        mbmi->mv.as_int = 0;
John Koleszar's avatar
John Koleszar committed
711

Paul Wilkins's avatar
Paul Wilkins committed
712
713
714
715
716
717
718
719
720
721
722
723
724
#if CONFIG_SEGFEATURES
        if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
            mbmi->mode = (MB_PREDICTION_MODE)
                         get_segdata( xd, mbmi->segment_id, SEG_LVL_MODE );
        else
#endif
        {
            mbmi->mode = (MB_PREDICTION_MODE)
                         vp8_read_ymode(bc, pbi->common.fc.ymode_prob);
        }

        // If MB mode is BPRED read the block modes
        if (mbmi->mode == B_PRED)
Scott LaVarnway's avatar
Scott LaVarnway committed
725
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
726
            int j = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
727
728
            do
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
729
                mi->bmi[j].as_mode = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob);
Scott LaVarnway's avatar
Scott LaVarnway committed
730
731
732
            }
            while (++j < 16);
        }
John Koleszar's avatar
John Koleszar committed
733

Scott LaVarnway's avatar
Scott LaVarnway committed
734
735
        mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, pbi->common.fc.uv_mode_prob);
    }
John Koleszar's avatar
John Koleszar committed
736

Scott LaVarnway's avatar
Scott LaVarnway committed
737
}
John Koleszar's avatar
John Koleszar committed
738

Scott LaVarnway's avatar
Scott LaVarnway committed
739
740
741
742
void vp8_decode_mode_mvs(VP8D_COMP *pbi)
{
    MODE_INFO *mi = pbi->common.mi;
    int mb_row = -1;
John Koleszar's avatar
John Koleszar committed
743

744
745
746
747
748
749
750
751
#if CONFIG_SEGFEATURES
#if 0
    FILE *statsfile;
    statsfile = fopen("decsegmap.stt", "a");
    fprintf(statsfile, "\n" );
#endif
#endif

752
    mb_mode_mv_init(pbi);
John Koleszar's avatar
John Koleszar committed
753

754
755
756
757
758
759
760
#if CONFIG_QIMODE
    if(pbi->common.frame_type==KEY_FRAME && !pbi->common.kf_ymode_probs_update)
    {
        pbi->common.kf_ymode_probs_index = vp8_read_literal(&pbi->bc, 3);
    }
#endif

Scott LaVarnway's avatar
Scott LaVarnway committed
761
762
763
764
765
    while (++mb_row < pbi->common.mb_rows)
    {
        int mb_col = -1;
        int mb_to_top_edge;
        int mb_to_bottom_edge;
John Koleszar's avatar
John Koleszar committed
766

Scott LaVarnway's avatar
Scott LaVarnway committed
767
768
769
        pbi->mb.mb_to_top_edge =
        mb_to_top_edge = -((mb_row * 16)) << 3;
        mb_to_top_edge -= LEFT_TOP_MARGIN;
John Koleszar's avatar
John Koleszar committed
770

Scott LaVarnway's avatar
Scott LaVarnway committed
771
772
773
        pbi->mb.mb_to_bottom_edge =
        mb_to_bottom_edge = ((pbi->common.mb_rows - 1 - mb_row) * 16) << 3;
        mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
John Koleszar's avatar
John Koleszar committed
774

775
776
777
778
779
780
#if CONFIG_SEGFEATURES
#if 0
        fprintf(statsfile, "\n" );
#endif
#endif

Scott LaVarnway's avatar
Scott LaVarnway committed
781
782
        while (++mb_col < pbi->common.mb_cols)
        {
783
#if CONFIG_ERROR_CONCEALMENT
784
            int mb_num = mb_row * pbi->common.mb_cols + mb_col;
785
#endif
786
            /*read_mb_modes_mv(pbi, xd->mode_info_context, &xd->mode_info_context->mbmi, mb_row, mb_col);*/
Scott LaVarnway's avatar
Scott LaVarnway committed
787
788
            if(pbi->common.frame_type == KEY_FRAME)
                vp8_kfread_modes(pbi, mi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
789
            else
790
                read_mb_modes_mv(pbi, mi, &mi->mbmi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
791

Yaowu Xu's avatar
Yaowu Xu committed
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
            //printf("%3d", mi->mbmi.mode);

            /*
            if(pbi->common.current_video_frame==7)
            {
                FILE *fmode=fopen("kfmode.txt", "a");
                fprintf(fmode, "%3d:%3d:%d\n",mb_row, mb_col, mi->mbmi.mode);
                fclose(fmode);

            }*/
            /*
            if(mi->mbmi.mode==I8X8_PRED)
            {
                printf("F%3d:%d:%d\n", pbi->common.current_video_frame, mb_row, mb_col);
            }
            */
808
809
810
811
812
813
814
815
816
817
818
819
820
#if CONFIG_ERROR_CONCEALMENT
            /* look for corruption. set mvs_corrupt_from_mb to the current
             * mb_num if the frame is corrupt from this macroblock. */
            if (vp8dx_bool_error(&pbi->bc) && mb_num < pbi->mvs_corrupt_from_mb)
            {
                pbi->mvs_corrupt_from_mb = mb_num;
                /* no need to continue since the partition is corrupt from
                 * here on.
                 */
                return;
            }
#endif

821
822
823
824
825
826
827
#if CONFIG_SEGFEATURES
#if 0
            fprintf(statsfile, "%2d%2d%2d   ",
                mi->mbmi.segment_id, mi->mbmi.ref_frame, mi->mbmi.mode );
#endif
#endif

828
            mi++;       /* next macroblock */
John Koleszar's avatar
John Koleszar committed
829
        }
Yaowu Xu's avatar
Yaowu Xu committed
830
       // printf("\n");
831
        mi++;           /* skip left predictor each row */
John Koleszar's avatar
John Koleszar committed
832
    }
833
834
835
836
837
838
839

#if CONFIG_SEGFEATURES
#if 0
    fclose(statsfile);
#endif
#endif

John Koleszar's avatar
John Koleszar committed
840
}