decodemv.c 29.4 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
#include "vp8/common/seg_common.h"

John Koleszar's avatar
John Koleszar committed
21 22 23
#if CONFIG_DEBUG
#include <assert.h>
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
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
45 46 47
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
48

Yaowu Xu's avatar
Yaowu Xu committed
49 50
    return i;
}
Scott LaVarnway's avatar
Scott LaVarnway committed
51 52 53 54 55 56 57 58 59


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;
}

Paul Wilkins's avatar
Paul Wilkins committed
60 61 62
// This function reads the current macro block's segnment id to from bitstream
// It should only be called if a segment map update is indicated.
static void vp8_read_mb_segid(vp8_reader *r, MB_MODE_INFO *mi, MACROBLOCKD *x)
Scott LaVarnway's avatar
Scott LaVarnway committed
63
{
64
    /* Is segmentation enabled */
Scott LaVarnway's avatar
Scott LaVarnway committed
65 66
    if (x->segmentation_enabled && x->update_mb_segmentation_map)
    {
67
        /* If so then read the segment id. */
Scott LaVarnway's avatar
Scott LaVarnway committed
68 69 70 71 72 73
        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
74
extern const int vp8_i8x8_block[4];
Paul Wilkins's avatar
Paul Wilkins committed
75 76 77 78
static void vp8_kfread_modes(VP8D_COMP *pbi,
                             MODE_INFO *m,
                             int mb_row,
                             int mb_col)
Scott LaVarnway's avatar
Scott LaVarnway committed
79 80 81
{
    vp8_reader *const bc = & pbi->bc;
    const int mis = pbi->common.mode_info_stride;
Paul Wilkins's avatar
Paul Wilkins committed
82
    int map_index = mb_row * pbi->common.mb_cols + mb_col;
Paul Wilkins's avatar
Paul Wilkins committed
83
    MB_PREDICTION_MODE y_mode;
Paul Wilkins's avatar
Paul Wilkins committed
84

Paul Wilkins's avatar
Paul Wilkins committed
85
    // Read the Macroblock segmentation map if it is being updated explicitly
86
    // this frame (reset to 0 by default).
Paul Wilkins's avatar
Paul Wilkins committed
87 88 89 90
    m->mbmi.segment_id = 0;
    if (pbi->mb.update_mb_segmentation_map)
    {
        vp8_read_mb_segid(bc, &m->mbmi, &pbi->mb);
91
        pbi->common.last_frame_seg_map[map_index] = m->mbmi.segment_id;
Paul Wilkins's avatar
Paul Wilkins committed
92
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
93

94
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
95 96 97 98 99 100 101 102 103 104
    if ( pbi->common.mb_no_coeff_skip &&
         ( !segfeature_active( &pbi->mb,
                               m->mbmi.segment_id, SEG_LVL_EOB ) ||
           ( get_segdata( &pbi->mb,
                          m->mbmi.segment_id, SEG_LVL_EOB ) != 0 ) ) )
    {
        m->mbmi.mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
    }
    else
    {
105
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
106 107 108 109 110 111 112 113 114 115
        if ( segfeature_active( &pbi->mb,
                                m->mbmi.segment_id, SEG_LVL_EOB ) &&
             ( get_segdata( &pbi->mb,
                            m->mbmi.segment_id, SEG_LVL_EOB ) == 0 ) )
        {
            m->mbmi.mb_skip_coeff = 1;
        }
        else
            m->mbmi.mb_skip_coeff = 0;
    }
116

117
#if CONFIG_QIMODE
Paul Wilkins's avatar
Paul Wilkins committed
118 119
    y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc,
        pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]);
120
#else
Paul Wilkins's avatar
Paul Wilkins committed
121 122
    y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(
                                      bc, pbi->common.kf_ymode_prob);
123
#endif
Paul Wilkins's avatar
Paul Wilkins committed
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
    m->mbmi.ref_frame = INTRA_FRAME;

    if ((m->mbmi.mode = y_mode) == B_PRED)
    {
        int i = 0;
        do
        {
            const B_PREDICTION_MODE A = above_block_mode(m, i, mis);
            const B_PREDICTION_MODE L = left_block_mode(m, i);

            m->bmi[i].as_mode =
                (B_PREDICTION_MODE) vp8_read_bmode(
                                        bc, pbi->common.kf_bmode_prob [A] [L]);
        }
        while (++i < 16);
    }
    if((m->mbmi.mode = y_mode) == I8X8_PRED)
    {
        int i;
        int mode8x8;
        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;
         }
   }
    else
155
#if CONFIG_UVINTRA
Yaowu Xu's avatar
Yaowu Xu committed
156 157
        m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
            pbi->common.kf_uv_mode_prob[m->mbmi.mode]);
158
#else
Yaowu Xu's avatar
Yaowu Xu committed
159 160
        m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
            pbi->common.kf_uv_mode_prob);
161
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
162
}
John Koleszar's avatar
John Koleszar committed
163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229

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);
}

230 231
// Read the referncence frame
static MV_REFERENCE_FRAME read_ref_frame( VP8D_COMP *pbi,
Paul Wilkins's avatar
Paul Wilkins committed
232
                                          vp8_reader *const bc,
233 234 235
                                          unsigned char segment_id )
{
    MV_REFERENCE_FRAME ref_frame;
Paul Wilkins's avatar
Paul Wilkins committed
236
    int seg_ref_active;
237

238
//#if CONFIG_SEGFEATURES
239 240
    MACROBLOCKD *const xd = &pbi->mb;

Paul Wilkins's avatar
Paul Wilkins committed
241 242 243
    seg_ref_active = segfeature_active( xd,
                                        segment_id,
                                        SEG_LVL_REF_FRAME );
244

Paul Wilkins's avatar
Paul Wilkins committed
245 246
    // Segment reference frame features not available
    if ( !seg_ref_active )
247 248 249 250 251 252 253 254 255 256 257 258 259 260
    {
        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)));
            }
        }
    }

261
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
262 263 264 265 266 267 268 269 270 271 272 273 274 275 276
    // 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
Paul Wilkins's avatar
Paul Wilkins committed
277
                ref_frame = LAST_FRAME;
Paul Wilkins's avatar
Paul Wilkins committed
278

Paul Wilkins's avatar
Paul Wilkins committed
279
            if ( ref_frame == LAST_FRAME )
Paul Wilkins's avatar
Paul Wilkins committed
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
            {
                // 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
                }
            }
        }
    }

333 334
    return (MV_REFERENCE_FRAME)ref_frame;
}
John Koleszar's avatar
John Koleszar committed
335 336 337 338 339 340 341 342

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;
}

343
static B_PREDICTION_MODE sub_mv_ref(vp8_reader *bc, const vp8_prob *p)
John Koleszar's avatar
John Koleszar committed
344 345 346
{
    const int i = vp8_treed_read(bc, vp8_sub_mv_ref_tree, p);

347
    return (B_PREDICTION_MODE)i;
John Koleszar's avatar
John Koleszar committed
348
}
Scott LaVarnway's avatar
Scott LaVarnway committed
349 350

#ifdef VPX_MODE_COUNT
John Koleszar's avatar
John Koleszar committed
351 352 353 354 355 356 357 358
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
359
#endif
John Koleszar's avatar
John Koleszar committed
360

361 362
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
363 364 365 366 367
    { 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
368 369 370



371
static void mb_mode_mv_init(VP8D_COMP *pbi)
Scott LaVarnway's avatar
Scott LaVarnway committed
372 373 374
{
    vp8_reader *const bc = & pbi->bc;
    MV_CONTEXT *const mvc = pbi->common.fc.mvc;
John Koleszar's avatar
John Koleszar committed
375

376 377 378 379 380 381
#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
382 383 384
    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
385

Scott LaVarnway's avatar
Scott LaVarnway committed
386
    if(pbi->common.frame_type != KEY_FRAME)
John Koleszar's avatar
John Koleszar committed
387
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
388 389 390
        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);
391 392 393 394 395 396 397 398 399 400 401
#if CONFIG_DUALPRED
        pbi->common.dual_pred_mode = vp8_read(bc, 128);
        if (pbi->common.dual_pred_mode)
            pbi->common.dual_pred_mode += vp8_read(bc, 128);
        if (pbi->common.dual_pred_mode == HYBRID_PREDICTION)
        {
            pbi->prob_dualpred[0] = (vp8_prob)vp8_read_literal(bc, 8);
            pbi->prob_dualpred[1] = (vp8_prob)vp8_read_literal(bc, 8);
            pbi->prob_dualpred[2] = (vp8_prob)vp8_read_literal(bc, 8);
        }
#endif /* CONFIG_DUALPRED */
John Koleszar's avatar
John Koleszar committed
402

Scott LaVarnway's avatar
Scott LaVarnway committed
403
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
404
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
405
            int i = 0;
John Koleszar's avatar
John Koleszar committed
406

Scott LaVarnway's avatar
Scott LaVarnway committed
407 408 409 410 411 412
            do
            {
                pbi->common.fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
            }
            while (++i < 4);
        }
413 414 415
#if CONFIG_UVINTRA
        //vp8_read_bit(bc);
#else
Scott LaVarnway's avatar
Scott LaVarnway committed
416
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
417
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
418 419 420 421 422 423 424
            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
425
        }
426
#endif /* CONFIG_UVINTRA */
Scott LaVarnway's avatar
Scott LaVarnway committed
427
        read_mvcontexts(bc, mvc);
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,
433 434 435
#if CONFIG_NEWNEAR
                             MODE_INFO *prev_mi,
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
436 437
                            int mb_row, int mb_col)
{
438
    VP8_COMMON *const cm = & pbi->common;
Scott LaVarnway's avatar
Scott LaVarnway committed
439 440 441
    vp8_reader *const bc = & pbi->bc;
    MV_CONTEXT *const mvc = pbi->common.fc.mvc;
    const int mis = pbi->common.mode_info_stride;
442
    MACROBLOCKD *const xd  = & pbi->mb;
443

444
    int pred_context;
445
    int index = mb_row * pbi->common.mb_cols + mb_col;
Scott LaVarnway's avatar
Scott LaVarnway committed
446
    int_mv *const mv = & mbmi->mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
447 448 449 450 451
    int mb_to_left_edge;
    int mb_to_right_edge;
    int mb_to_top_edge;
    int mb_to_bottom_edge;

452 453
    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
454 455 456
    mb_to_top_edge -= LEFT_TOP_MARGIN;
    mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
    mbmi->need_to_clamp_mvs = 0;
457 458 459
#if CONFIG_DUALPRED
    mbmi->second_ref_frame = 0;
#endif /* CONFIG_DUALPRED */
460 461 462
    /* 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
     */
463
    xd->mb_to_left_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
464 465 466
    mb_to_left_edge = -((mb_col * 16) << 3);
    mb_to_left_edge -= LEFT_TOP_MARGIN;

467
    xd->mb_to_right_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
468 469 470
    mb_to_right_edge = ((pbi->common.mb_cols - 1 - mb_col) * 16) << 3;
    mb_to_right_edge += RIGHT_BOTTOM_MARGIN;

471
    /* If required read in new segmentation data for this MB */
472
    if (xd->segmentation_enabled)
473
    {
474
        if (xd->update_mb_segmentation_map)
475
        {
476
            // Is temporal coding of the segment id for this mb enabled.
477
            if (cm->temporal_update)
478
            {
479 480 481 482 483 484
                // Work out a context for decoding seg_id_predicted.
                pred_context = 0;
                if (mb_col != 0)
                    pred_context += (mi-1)->mbmi.seg_id_predicted;
                if (mb_row != 0)
                    pred_context +=
485
                        (mi-cm->mode_info_stride)->mbmi.seg_id_predicted;
486 487 488

                mbmi->seg_id_predicted =
                    vp8_read(bc,
489
                             cm->segment_pred_probs[pred_context]);
490 491 492

                if ( mbmi->seg_id_predicted )
                {
493
                    mbmi->segment_id = cm->last_frame_seg_map[index];
494 495 496 497 498
                }
                // If the segment id was not predicted decode it explicitly
                else
                {
                    vp8_read_mb_segid(bc, &mi->mbmi, xd);
499
                    cm->last_frame_seg_map[index] = mbmi->segment_id;
500 501
                }

502
            }
503
            // Normal unpredicted coding mode
504
            else
505
            {
Paul Wilkins's avatar
Paul Wilkins committed
506
                vp8_read_mb_segid(bc, &mi->mbmi, xd);
507
                cm->last_frame_seg_map[index] = mbmi->segment_id;
508
            }
509
            index++;
510 511
        }
    }
512 513 514 515 516 517
    else
    {
        // The encoder explicitly sets the segment_id to 0
        // when segmentation is disabled
        mbmi->segment_id = 0;
    }
518
//#if CONFIG_SEGFEATURES
519 520 521
    if ( pbi->common.mb_no_coeff_skip &&
         ( !segfeature_active( xd,
                               mbmi->segment_id, SEG_LVL_EOB ) ||
Paul Wilkins's avatar
Paul Wilkins committed
522
           (get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) != 0) ) )
523 524 525
    {
        // Read the macroblock coeff skip flag if this feature is in use,
        // else default to 0
Scott LaVarnway's avatar
Scott LaVarnway committed
526
        mbmi->mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
527
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
528
    else
529
    {
530
//#if CONFIG_SEGFEATURES
531 532
        if ( segfeature_active( xd,
                                mbmi->segment_id, SEG_LVL_EOB ) &&
Paul Wilkins's avatar
Paul Wilkins committed
533
             (get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) == 0) )
534 535 536 537 538 539
        {
            mbmi->mb_skip_coeff = 1;
        }
        else
            mbmi->mb_skip_coeff = 0;
    }
John Koleszar's avatar
John Koleszar committed
540

541
    // Read the reference frame
Paul Wilkins's avatar
Paul Wilkins committed
542
    mbmi->ref_frame = read_ref_frame( pbi, bc, mbmi->segment_id );
543 544 545

    // If reference frame is an Inter frame
    if (mbmi->ref_frame)
John Koleszar's avatar
John Koleszar committed
546
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
547
        int rct[4];
Scott LaVarnway's avatar
Scott LaVarnway committed
548
        int_mv nearest, nearby, best_mv;
549
        vp8_prob mv_ref_p [VP8_MVREFS-1];
John Koleszar's avatar
John Koleszar committed
550

551 552 553 554 555
        vp8_find_near_mvs(xd, mi,
#if CONFIG_NEWNEAR
            prev_mi,
#endif
            &nearest, &nearby, &best_mv, rct,
556
                          mbmi->ref_frame, pbi->common.ref_frame_sign_bias);
Yaowu Xu's avatar
Yaowu Xu committed
557
        vp8_mv_ref_probs(&pbi->common, mv_ref_p, rct);
558

559
//#if CONFIG_SEGFEATURES
560
        // Is the segment level mode feature enabled for this segment
561
        if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
John Koleszar's avatar
John Koleszar committed
562
        {
563
            mbmi->mode =
Paul Wilkins's avatar
Paul Wilkins committed
564
                get_segdata( xd, mbmi->segment_id, SEG_LVL_MODE );
John Koleszar's avatar
John Koleszar committed
565
        }
566 567 568
        else
        {
            mbmi->mode = read_mv_ref(bc, mv_ref_p);
Yaowu Xu's avatar
Yaowu Xu committed
569 570 571 572

#if CONFIG_NEWNEAR
            vp8_accum_mv_refs(&pbi->common, mbmi->mode, rct);
#endif
573
        }
John Koleszar's avatar
John Koleszar committed
574

Scott LaVarnway's avatar
Scott LaVarnway committed
575
        mbmi->uv_mode = DC_PRED;
576
        switch (mbmi->mode)
John Koleszar's avatar
John Koleszar committed
577
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
578 579 580 581 582 583
        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
584

Scott LaVarnway's avatar
Scott LaVarnway committed
585 586
            do  /* for each subset j */
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
587
                int_mv leftmv, abovemv;
Scott LaVarnway's avatar
Scott LaVarnway committed
588
                int_mv blockmv;
Scott LaVarnway's avatar
Scott LaVarnway committed
589 590 591
                int k;  /* first block in subset j */
                int mv_contz;
                k = vp8_mbsplit_offset[s][j];
John Koleszar's avatar
John Koleszar committed
592

Scott LaVarnway's avatar
Scott LaVarnway committed
593 594
                leftmv.as_int = left_block_mv(mi, k);
                abovemv.as_int = above_block_mv(mi, k, mis);
595
                mv_contz = vp8_mv_cont(&leftmv, &abovemv);
John Koleszar's avatar
John Koleszar committed
596

597
                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
598
                {
Scott LaVarnway's avatar
Scott LaVarnway committed
599
                case NEW4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
600 601 602
                    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
603 604 605 606 607
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][3]++;
  #endif
                    break;
                case LEFT4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
608
                    blockmv.as_int = leftmv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
609 610 611 612 613
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][0]++;
  #endif
                    break;
                case ABOVE4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
614
                    blockmv.as_int = abovemv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
615 616 617 618 619
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][1]++;
  #endif
                    break;
                case ZERO4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
620
                    blockmv.as_int = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
621 622 623 624 625 626
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][2]++;
  #endif
                    break;
                default:
                    break;
John Koleszar's avatar
John Koleszar committed
627 628
                }

Scott LaVarnway's avatar
Scott LaVarnway committed
629
                mbmi->need_to_clamp_mvs = vp8_check_mv_bounds(&blockmv,
Scott LaVarnway's avatar
Scott LaVarnway committed
630 631 632 633
                                                          mb_to_left_edge,
                                                          mb_to_right_edge,
                                                          mb_to_top_edge,
                                                          mb_to_bottom_edge);
John Koleszar's avatar
John Koleszar committed
634 635

                {
Scott LaVarnway's avatar
Scott LaVarnway committed
636 637 638
                    /* Fill (uniform) modes, mvs of jth subset.
                     Must do it here because ensuing subsets can
                     refer back to us via "left" or "above". */
639 640
                    const unsigned char *fill_offset;
                    unsigned int fill_count = mbsplit_fill_count[s];
John Koleszar's avatar
John Koleszar committed
641

642
                    fill_offset = &mbsplit_fill_offset[s][(unsigned char)j * mbsplit_fill_count[s]];
John Koleszar's avatar
John Koleszar committed
643

Scott LaVarnway's avatar
Scott LaVarnway committed
644
                    do {
Scott LaVarnway's avatar
Scott LaVarnway committed
645
                        mi->bmi[ *fill_offset].mv.as_int = blockmv.as_int;
646
                        fill_offset++;
Scott LaVarnway's avatar
Scott LaVarnway committed
647
                    }while (--fill_count);
John Koleszar's avatar
John Koleszar committed
648 649 650
                }

            }
Scott LaVarnway's avatar
Scott LaVarnway committed
651 652
            while (++j < num_p);
        }
John Koleszar's avatar
John Koleszar committed
653

Scott LaVarnway's avatar
Scott LaVarnway committed
654
        mv->as_int = mi->bmi[15].mv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
655 656 657 658

        break;  /* done with SPLITMV */

        case NEARMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
659
            mv->as_int = nearby.as_int;
660
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
661 662
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
663
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
664 665

        case NEARESTMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
666
            mv->as_int = nearest.as_int;
667
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
668 669
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
670
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
671 672

        case ZEROMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
673
            mv->as_int = 0;
674
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
675 676

        case NEWMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
677 678 679
            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
680 681 682 683 684 685

            /* 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
686 687 688 689 690
            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);
691

692
        propagate_mv:  /* same MV throughout */
693 694 695 696 697 698 699 700 701 702 703 704
#if CONFIG_DUALPRED
            if (pbi->common.dual_pred_mode == DUAL_PREDICTION_ONLY ||
                (pbi->common.dual_pred_mode == HYBRID_PREDICTION &&
                 vp8_read(bc, pbi->prob_dualpred[(mi[-1].mbmi.second_ref_frame != INTRA_FRAME) +
                                                 (mi[-mis].mbmi.second_ref_frame != INTRA_FRAME)])))
            {
                mbmi->second_ref_frame = mbmi->ref_frame + 1;
                if (mbmi->second_ref_frame == 4)
                    mbmi->second_ref_frame = 1;
            }
            if (mbmi->second_ref_frame)
            {
Paul Wilkins's avatar
Paul Wilkins committed
705 706 707 708 709 710 711
                vp8_find_near_mvs(xd, mi,
#if CONFIG_NEWNEAR
                                  prev_mi,
#endif
                                  &nearest, &nearby, &best_mv, rct,
                                  (int)mbmi->second_ref_frame,
                                  pbi->common.ref_frame_sign_bias);
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
                switch (mbmi->mode) {
                case ZEROMV:
                    mbmi->second_mv.as_int = 0;
                    break;
                case NEARMV:
                    mbmi->second_mv.as_int = nearby.as_int;
                    vp8_clamp_mv(&mbmi->second_mv, mb_to_left_edge, mb_to_right_edge,
                                 mb_to_top_edge, mb_to_bottom_edge);
                    break;
                case NEARESTMV:
                    mbmi->second_mv.as_int = nearest.as_int;
                    vp8_clamp_mv(&mbmi->second_mv, mb_to_left_edge, mb_to_right_edge,
                                 mb_to_top_edge, mb_to_bottom_edge);
                    break;
                case NEWMV:
                    read_mv(bc, &mbmi->second_mv.as_mv, (const MV_CONTEXT *) mvc);
                    mbmi->second_mv.as_mv.row += best_mv.as_mv.row;
                    mbmi->second_mv.as_mv.col += best_mv.as_mv.col;
                    mbmi->need_to_clamp_mvs |= vp8_check_mv_bounds(&mbmi->second_mv,
                                                                   mb_to_left_edge,
                                                                   mb_to_right_edge,
                                                                   mb_to_top_edge,
                                                                   mb_to_bottom_edge);
                    break;
                default:
                    break;
                }
            }
#endif /* CONFIG_DUALPRED */

742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763
#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
764 765 766 767 768 769 770 771
        default:;
  #if CONFIG_DEBUG
            assert(0);
  #endif
        }
    }
    else
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
772 773
        /* required for left and above block mv */
        mbmi->mv.as_int = 0;
John Koleszar's avatar
John Koleszar committed
774

775
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
776 777 778 779 780 781 782 783 784 785 786
        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
787
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
788
            int j = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
789 790
            do
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
791
                mi->bmi[j].as_mode = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob);
Scott LaVarnway's avatar
Scott LaVarnway committed
792 793 794
            }
            while (++j < 16);
        }
John Koleszar's avatar
John Koleszar committed
795

796 797 798 799 800 801 802 803 804 805 806 807 808 809 810
        if(mbmi->mode == I8X8_PRED)
        {
            int i;
            int mode8x8;
            for(i=0;i<4;i++)
            {
                int ib = vp8_i8x8_block[i];
                mode8x8 = vp8_read_i8x8_mode(bc, pbi->common.i8x8_mode_prob);
                mi->bmi[ib+0].as_mode= mode8x8;
                mi->bmi[ib+1].as_mode= mode8x8;
                mi->bmi[ib+4].as_mode= mode8x8;
                mi->bmi[ib+5].as_mode= mode8x8;
            }
        }
        else
811 812 813 814 815 816 817
#if CONFIG_UVINTRA
            mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
                                    pbi->common.fc.uv_mode_prob[mbmi->mode]);
#else
            mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
                                    pbi->common.fc.uv_mode_prob);
#endif /*CONFIG_UVINTRA*/
Scott LaVarnway's avatar
Scott LaVarnway committed
818
    }
John Koleszar's avatar
John Koleszar committed
819

Scott LaVarnway's avatar
Scott LaVarnway committed
820
}
John Koleszar's avatar
John Koleszar committed
821

Scott LaVarnway's avatar
Scott LaVarnway committed
822 823 824
void vp8_decode_mode_mvs(VP8D_COMP *pbi)
{
    MODE_INFO *mi = pbi->common.mi;
825 826 827 828 829

#if CONFIG_NEWNEAR
    MODE_INFO *prev_mi = pbi->common.prev_mi;
#endif

Scott LaVarnway's avatar
Scott LaVarnway committed
830
    int mb_row = -1;
John Koleszar's avatar
John Koleszar committed
831

832
//#if CONFIG_SEGFEATURES
833 834 835 836 837 838
#if 0
    FILE *statsfile;
    statsfile = fopen("decsegmap.stt", "a");
    fprintf(statsfile, "\n" );
#endif

839
    mb_mode_mv_init(pbi);
John Koleszar's avatar
John Koleszar committed
840

841 842 843 844 845 846 847
#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
848 849 850 851 852
    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
853

Scott LaVarnway's avatar
Scott LaVarnway committed
854 855 856
        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
857

Scott LaVarnway's avatar
Scott LaVarnway committed
858 859 860
        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
861

862
//#if CONFIG_SEGFEATURES
863 864 865 866
#if 0
        fprintf(statsfile, "\n" );
#endif

Scott LaVarnway's avatar
Scott LaVarnway committed
867 868
        while (++mb_col < pbi->common.mb_cols)
        {
869
#if CONFIG_ERROR_CONCEALMENT
870
            int mb_num = mb_row * pbi->common.mb_cols + mb_col;
871
#endif
872
            /*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
873 874
            if(pbi->common.frame_type == KEY_FRAME)
                vp8_kfread_modes(pbi, mi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
875
            else
876 877 878 879 880
                read_mb_modes_mv(pbi, mi, &mi->mbmi,
#if CONFIG_NEWNEAR
                prev_mi,
#endif
                mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
881

Yaowu Xu's avatar
Yaowu Xu committed
882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897
            //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);
            }
            */
898 899 900 901 902 903 904 905 906 907 908 909 910
#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

911
//#if CONFIG_SEGFEATURES
912 913 914 915
#if 0
            fprintf(statsfile, "%2d%2d%2d   ",
                mi->mbmi.segment_id, mi->mbmi.ref_frame, mi->mbmi.mode );
#endif
916 917 918
#if CONFIG_NEWNEAR
            prev_mi++;
#endif
919
            mi++;       /* next macroblock */
John Koleszar's avatar
John Koleszar committed
920
        }
Yaowu Xu's avatar
Yaowu Xu committed
921
       // printf("\n");
922 923 924
#if CONFIG_NEWNEAR
        prev_mi++;
#endif
925
        mi++;           /* skip left predictor each row */
John Koleszar's avatar
John Koleszar committed
926
    }
927

928
//#if CONFIG_SEGFEATURES
929 930 931
#if 0
    fclose(statsfile);
#endif
932

933

934
}