decodemv.c 25.7 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
//#if CONFIG_SEGFEATURES
19
20
21
22
23
24
#include "vp8/common/seg_common.h"

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

John Koleszar's avatar
John Koleszar committed
25
26
27
#if CONFIG_DEBUG
#include <assert.h>
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
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
49
50
51
52
#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
53

Yaowu Xu's avatar
Yaowu Xu committed
54
55
56
    return i;
}
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
57
58
59
60
61
62
63
64
65
66
67


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)
{
68
    /* Is segmentation enabled */
Scott LaVarnway's avatar
Scott LaVarnway committed
69
70
    if (x->segmentation_enabled && x->update_mb_segmentation_map)
    {
71
        /* If so then read the segment id. */
Scott LaVarnway's avatar
Scott LaVarnway committed
72
73
74
75
76
77
        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
78
extern const int vp8_i8x8_block[4];
Scott LaVarnway's avatar
Scott LaVarnway committed
79
80
81
82
83
84
85
86
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;

87
88
89
            /* 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
90
91
92
93
94
            m->mbmi.segment_id = 0;

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

95
//#if CONFIG_SEGFEATURES
96
97
98
99
100
            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) ) )
101
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
102
                m->mbmi.mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
103
            }
Scott LaVarnway's avatar
Scott LaVarnway committed
104
            else
105
            {
106
//#if CONFIG_SEGFEATURES
107
108
109
110
111
112
113
114
115
116
117
                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
                    m->mbmi.mb_skip_coeff = 0;
            }

118
119
#if CONFIG_QIMODE
            y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc,
120
                pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]);
121
#else
Scott LaVarnway's avatar
Scott LaVarnway committed
122
            y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc, pbi->common.kf_ymode_prob);
123
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
124
125
126
127
128
129
130
            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
131
132
                    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
133

Scott LaVarnway's avatar
Scott LaVarnway committed
134
                    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
135
136
137
                }
                while (++i < 16);
            }
Yaowu Xu's avatar
Yaowu Xu committed
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
#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
158
159
160
161
162
163
164
#if CONFIG_UVINTRA
            m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
                pbi->common.kf_uv_mode_prob[m->mbmi.mode]);
#else
            m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
                pbi->common.kf_uv_mode_prob);
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
165
166
        }
}
John Koleszar's avatar
John Koleszar committed
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233

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);
}

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

242
//#if CONFIG_SEGFEATURES
243
244
    MACROBLOCKD *const xd = &pbi->mb;

Paul Wilkins's avatar
Paul Wilkins committed
245
246
247
    seg_ref_active = segfeature_active( xd,
                                        segment_id,
                                        SEG_LVL_REF_FRAME );
248

Paul Wilkins's avatar
Paul Wilkins committed
249
250
    // Segment reference frame features not available
    if ( !seg_ref_active )
251
252
253
254
255
256
257
258
259
260
261
262
263
264
    {
        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)));
            }
        }
    }

265
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
    // 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
                }
            }
        }
    }

337
338
    return (MV_REFERENCE_FRAME)ref_frame;
}
John Koleszar's avatar
John Koleszar committed
339
340
341
342
343
344
345
346

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;
}

347
static B_PREDICTION_MODE sub_mv_ref(vp8_reader *bc, const vp8_prob *p)
John Koleszar's avatar
John Koleszar committed
348
349
350
{
    const int i = vp8_treed_read(bc, vp8_sub_mv_ref_tree, p);

351
    return (B_PREDICTION_MODE)i;
John Koleszar's avatar
John Koleszar committed
352
}
Scott LaVarnway's avatar
Scott LaVarnway committed
353
354

#ifdef VPX_MODE_COUNT
John Koleszar's avatar
John Koleszar committed
355
356
357
358
359
360
361
362
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
363
#endif
John Koleszar's avatar
John Koleszar committed
364

365
366
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
367
368
369
370
371
    { 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
372
373
374



375
static void mb_mode_mv_init(VP8D_COMP *pbi)
Scott LaVarnway's avatar
Scott LaVarnway committed
376
377
378
{
    vp8_reader *const bc = & pbi->bc;
    MV_CONTEXT *const mvc = pbi->common.fc.mvc;
379
#if CONFIG_SEGMENTATION
380
    MACROBLOCKD *const xd  = & pbi->mb;
381
#endif
John Koleszar's avatar
John Koleszar committed
382

383
384
385
386
387
388
#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
389
390
391
    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
392

Scott LaVarnway's avatar
Scott LaVarnway committed
393
    if(pbi->common.frame_type != KEY_FRAME)
John Koleszar's avatar
John Koleszar committed
394
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
395
396
397
        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
398

Scott LaVarnway's avatar
Scott LaVarnway committed
399
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
400
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
401
            int i = 0;
John Koleszar's avatar
John Koleszar committed
402

Scott LaVarnway's avatar
Scott LaVarnway committed
403
404
405
406
407
408
            do
            {
                pbi->common.fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
            }
            while (++i < 4);
        }
John Koleszar's avatar
John Koleszar committed
409

Scott LaVarnway's avatar
Scott LaVarnway committed
410
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
411
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
412
413
414
415
416
417
418
            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
419
420
        }

Scott LaVarnway's avatar
Scott LaVarnway committed
421
        read_mvcontexts(bc, mvc);
422
423
424
#if CONFIG_SEGMENTATION
    xd->temporal_update = vp8_read_bit(bc);
#endif
John Koleszar's avatar
John Koleszar committed
425
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
426
}
John Koleszar's avatar
John Koleszar committed
427

428

429
static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi,
Scott LaVarnway's avatar
Scott LaVarnway committed
430
431
432
433
434
                            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;
435
    MACROBLOCKD *const xd  = & pbi->mb;
436
437

#if CONFIG_SEGMENTATION
438
439
440
    int sum;
    int index = mb_row * pbi->common.mb_cols + mb_col;
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
441
    int_mv *const mv = & mbmi->mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
442
443
444
445
446
    int mb_to_left_edge;
    int mb_to_right_edge;
    int mb_to_top_edge;
    int mb_to_bottom_edge;

447
448
    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
449
450
451
    mb_to_top_edge -= LEFT_TOP_MARGIN;
    mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
    mbmi->need_to_clamp_mvs = 0;
452
453
454
    /* 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
     */
455
    xd->mb_to_left_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
456
457
458
    mb_to_left_edge = -((mb_col * 16) << 3);
    mb_to_left_edge -= LEFT_TOP_MARGIN;

459
    xd->mb_to_right_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
460
461
462
    mb_to_right_edge = ((pbi->common.mb_cols - 1 - mb_col) * 16) << 3;
    mb_to_right_edge += RIGHT_BOTTOM_MARGIN;

463
    /* If required read in new segmentation data for this MB */
464
    if (xd->update_mb_segmentation_map)
465
466
            {
#if CONFIG_SEGMENTATION
467
468
469
                if (xd->temporal_update)
                {
                    sum = 0;
470

471
472
473
                    if (mb_col != 0)
                        sum += (mi-1)->mbmi.segment_flag;
                    if (mb_row != 0)
474
                        sum += (mi-pbi->common.mb_cols)->mbmi.segment_flag;
475

476
                    if (vp8_read(bc, xd->mb_segment_tree_probs[3+sum]) == 0)
477
                    {
478
479
                        mbmi->segment_id = pbi->segmentation_map[index];
                        mbmi->segment_flag = 0;
480
                    }
481
482
                    else
                    {
483
                        vp8_read_mb_features(bc, &mi->mbmi, xd);
484
485
486
487
                        mbmi->segment_flag = 1;
                        pbi->segmentation_map[index] = mbmi->segment_id;
                    }

488
489
490
                }
                else
                {
491
                    vp8_read_mb_features(bc, &mi->mbmi, xd);
492
                    pbi->segmentation_map[index] = mbmi->segment_id;
493
                }
494
                index++;
495
#else
496
                vp8_read_mb_features(bc, &mi->mbmi, xd);
497
498
#endif
            }
John Koleszar's avatar
John Koleszar committed
499

500
//#if CONFIG_SEGFEATURES
501
502
503
504
505
506
507
508
    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) ) )
    {
        // Read the macroblock coeff skip flag if this feature is in use,
        // else default to 0
Scott LaVarnway's avatar
Scott LaVarnway committed
509
        mbmi->mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
510
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
511
    else
512
    {
513
//#if CONFIG_SEGFEATURES
514
515
516
517
518
519
520
521
522
523
        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
            mbmi->mb_skip_coeff = 0;
    }
John Koleszar's avatar
John Koleszar committed
524

525
    // Read the reference frame
Paul Wilkins's avatar
Paul Wilkins committed
526
    mbmi->ref_frame = read_ref_frame( pbi, bc, mbmi->segment_id );
527
528
529

    // If reference frame is an Inter frame
    if (mbmi->ref_frame)
John Koleszar's avatar
John Koleszar committed
530
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
531
        int rct[4];
Scott LaVarnway's avatar
Scott LaVarnway committed
532
        int_mv nearest, nearby, best_mv;
533
        vp8_prob mv_ref_p [VP8_MVREFS-1];
John Koleszar's avatar
John Koleszar committed
534

535
536
537
538
        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);

539
//#if CONFIG_SEGFEATURES
540
        // Is the segment level mode feature enabled for this segment
541
        if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
John Koleszar's avatar
John Koleszar committed
542
        {
543
544
            mbmi->mode =
                xd->segment_feature_data[mbmi->segment_id][SEG_LVL_MODE];
John Koleszar's avatar
John Koleszar committed
545
        }
546
547
548
549
        else
        {
            mbmi->mode = read_mv_ref(bc, mv_ref_p);
        }
John Koleszar's avatar
John Koleszar committed
550

Scott LaVarnway's avatar
Scott LaVarnway committed
551
        mbmi->uv_mode = DC_PRED;
552
        switch (mbmi->mode)
John Koleszar's avatar
John Koleszar committed
553
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
554
555
556
557
558
559
        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
560

Scott LaVarnway's avatar
Scott LaVarnway committed
561
562
            do  /* for each subset j */
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
563
                int_mv leftmv, abovemv;
Scott LaVarnway's avatar
Scott LaVarnway committed
564
                int_mv blockmv;
Scott LaVarnway's avatar
Scott LaVarnway committed
565
566
567
                int k;  /* first block in subset j */
                int mv_contz;
                k = vp8_mbsplit_offset[s][j];
John Koleszar's avatar
John Koleszar committed
568

Scott LaVarnway's avatar
Scott LaVarnway committed
569
570
                leftmv.as_int = left_block_mv(mi, k);
                abovemv.as_int = above_block_mv(mi, k, mis);
571
                mv_contz = vp8_mv_cont(&leftmv, &abovemv);
John Koleszar's avatar
John Koleszar committed
572

573
                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
574
                {
Scott LaVarnway's avatar
Scott LaVarnway committed
575
                case NEW4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
576
577
578
                    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
579
580
581
582
583
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][3]++;
  #endif
                    break;
                case LEFT4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
584
                    blockmv.as_int = leftmv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
585
586
587
588
589
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][0]++;
  #endif
                    break;
                case ABOVE4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
590
                    blockmv.as_int = abovemv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
591
592
593
594
595
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][1]++;
  #endif
                    break;
                case ZERO4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
596
                    blockmv.as_int = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
597
598
599
600
601
602
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][2]++;
  #endif
                    break;
                default:
                    break;
John Koleszar's avatar
John Koleszar committed
603
604
                }

Scott LaVarnway's avatar
Scott LaVarnway committed
605
                mbmi->need_to_clamp_mvs = vp8_check_mv_bounds(&blockmv,
Scott LaVarnway's avatar
Scott LaVarnway committed
606
607
608
609
                                                          mb_to_left_edge,
                                                          mb_to_right_edge,
                                                          mb_to_top_edge,
                                                          mb_to_bottom_edge);
John Koleszar's avatar
John Koleszar committed
610
611

                {
Scott LaVarnway's avatar
Scott LaVarnway committed
612
613
614
                    /* Fill (uniform) modes, mvs of jth subset.
                     Must do it here because ensuing subsets can
                     refer back to us via "left" or "above". */
615
616
                    const unsigned char *fill_offset;
                    unsigned int fill_count = mbsplit_fill_count[s];
John Koleszar's avatar
John Koleszar committed
617

618
                    fill_offset = &mbsplit_fill_offset[s][(unsigned char)j * mbsplit_fill_count[s]];
John Koleszar's avatar
John Koleszar committed
619

Scott LaVarnway's avatar
Scott LaVarnway committed
620
                    do {
Scott LaVarnway's avatar
Scott LaVarnway committed
621
                        mi->bmi[ *fill_offset].mv.as_int = blockmv.as_int;
622
                        fill_offset++;
Scott LaVarnway's avatar
Scott LaVarnway committed
623
                    }while (--fill_count);
John Koleszar's avatar
John Koleszar committed
624
625
626
                }

            }
Scott LaVarnway's avatar
Scott LaVarnway committed
627
628
            while (++j < num_p);
        }
John Koleszar's avatar
John Koleszar committed
629

Scott LaVarnway's avatar
Scott LaVarnway committed
630
        mv->as_int = mi->bmi[15].mv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
631
632
633
634

        break;  /* done with SPLITMV */

        case NEARMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
635
            mv->as_int = nearby.as_int;
636
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
637
638
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
639
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
640
641

        case NEARESTMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
642
            mv->as_int = nearest.as_int;
643
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
644
645
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
646
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
647
648

        case ZEROMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
649
            mv->as_int = 0;
650
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
651
652

        case NEWMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
653
654
655
            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
656
657
658
659
660
661

            /* 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
662
663
664
665
666
            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);
667

668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
        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
691
692
693
694
695
696
697
698
        default:;
  #if CONFIG_DEBUG
            assert(0);
  #endif
        }
    }
    else
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
699
700
        /* required for left and above block mv */
        mbmi->mv.as_int = 0;
John Koleszar's avatar
John Koleszar committed
701

702
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
703
704
705
706
707
708
709
710
711
712
713
        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
        {
            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
714
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
715
            int j = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
716
717
            do
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
718
                mi->bmi[j].as_mode = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob);
Scott LaVarnway's avatar
Scott LaVarnway committed
719
720
721
            }
            while (++j < 16);
        }
John Koleszar's avatar
John Koleszar committed
722

Scott LaVarnway's avatar
Scott LaVarnway committed
723
724
        mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, pbi->common.fc.uv_mode_prob);
    }
John Koleszar's avatar
John Koleszar committed
725

Scott LaVarnway's avatar
Scott LaVarnway committed
726
}
John Koleszar's avatar
John Koleszar committed
727

Scott LaVarnway's avatar
Scott LaVarnway committed
728
729
730
731
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
732

733
//#if CONFIG_SEGFEATURES
734
735
736
737
738
739
#if 0
    FILE *statsfile;
    statsfile = fopen("decsegmap.stt", "a");
    fprintf(statsfile, "\n" );
#endif

740
    mb_mode_mv_init(pbi);
John Koleszar's avatar
John Koleszar committed
741

742
743
744
745
746
747
748
#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
749
750
751
752
753
    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
754

Scott LaVarnway's avatar
Scott LaVarnway committed
755
756
757
        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
758

Scott LaVarnway's avatar
Scott LaVarnway committed
759
760
761
        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
762

763
//#if CONFIG_SEGFEATURES
764
765
766
767
#if 0
        fprintf(statsfile, "\n" );
#endif

Scott LaVarnway's avatar
Scott LaVarnway committed
768
769
        while (++mb_col < pbi->common.mb_cols)
        {
770
#if CONFIG_ERROR_CONCEALMENT
771
            int mb_num = mb_row * pbi->common.mb_cols + mb_col;
772
#endif
773
            /*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
774
775
            if(pbi->common.frame_type == KEY_FRAME)
                vp8_kfread_modes(pbi, mi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
776
            else
777
                read_mb_modes_mv(pbi, mi, &mi->mbmi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
778

Yaowu Xu's avatar
Yaowu Xu committed
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
            //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);
            }
            */
795
796
797
798
799
800
801
802
803
804
805
806
807
#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

808
//#if CONFIG_SEGFEATURES
809
810
811
812
#if 0
            fprintf(statsfile, "%2d%2d%2d   ",
                mi->mbmi.segment_id, mi->mbmi.ref_frame, mi->mbmi.mode );
#endif
813

814

815
            mi++;       /* next macroblock */
John Koleszar's avatar
John Koleszar committed
816
        }
Yaowu Xu's avatar
Yaowu Xu committed
817
       // printf("\n");
818
        mi++;           /* skip left predictor each row */
John Koleszar's avatar
John Koleszar committed
819
    }
820

821
//#if CONFIG_SEGFEATURES
822
823
824
#if 0
    fclose(statsfile);
#endif
825

826

John Koleszar's avatar
John Koleszar committed
827
}