decodemv.c 25.2 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 48
#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
49

Yaowu Xu's avatar
Yaowu Xu committed
50 51 52
    return i;
}
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
53 54 55 56 57 58 59 60 61


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
62 63 64
// 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
65
{
66
    /* Is segmentation enabled */
Scott LaVarnway's avatar
Scott LaVarnway committed
67 68
    if (x->segmentation_enabled && x->update_mb_segmentation_map)
    {
69
        /* If so then read the segment id. */
Scott LaVarnway's avatar
Scott LaVarnway committed
70 71 72 73 74 75
        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
76
extern const int vp8_i8x8_block[4];
Paul Wilkins's avatar
Paul Wilkins committed
77 78 79 80
static void vp8_kfread_modes(VP8D_COMP *pbi,
                             MODE_INFO *m,
                             int mb_row,
                             int mb_col)
Scott LaVarnway's avatar
Scott LaVarnway committed
81 82 83
{
    vp8_reader *const bc = & pbi->bc;
    const int mis = pbi->common.mode_info_stride;
Paul Wilkins's avatar
Paul Wilkins committed
84
    int map_index = mb_row * pbi->common.mb_cols + mb_col;
Paul Wilkins's avatar
Paul Wilkins committed
85
    MB_PREDICTION_MODE y_mode;
Paul Wilkins's avatar
Paul Wilkins committed
86

Paul Wilkins's avatar
Paul Wilkins committed
87 88 89 90 91 92 93 94
    // Read the Macroblock segmentation map if it is being updated explicitly
    // this frame (reset to 0 above by default).
    m->mbmi.segment_id = 0;
    if (pbi->mb.update_mb_segmentation_map)
    {
        vp8_read_mb_segid(bc, &m->mbmi, &pbi->mb);
        pbi->segmentation_map[map_index] = m->mbmi.segment_id;
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
95

96
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
97 98 99 100 101 102 103 104 105 106
    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
    {
107
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
108 109 110 111 112 113 114 115 116 117
        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;
    }
118

119
#if CONFIG_QIMODE
Paul Wilkins's avatar
Paul Wilkins committed
120 121
    y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc,
        pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]);
122
#else
Paul Wilkins's avatar
Paul Wilkins committed
123 124
    y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(
                                      bc, pbi->common.kf_ymode_prob);
125
#endif
Paul Wilkins's avatar
Paul Wilkins committed
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
    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);
    }
Yaowu Xu's avatar
Yaowu Xu committed
142
#if CONFIG_I8X8
Paul Wilkins's avatar
Paul Wilkins committed
143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161
    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
Yaowu Xu's avatar
Yaowu Xu committed
162
#endif
163
#if CONFIG_UVINTRA
Paul Wilkins's avatar
Paul Wilkins committed
164 165
    m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
        pbi->common.kf_uv_mode_prob[m->mbmi.mode]);
166
#else
Paul Wilkins's avatar
Paul Wilkins committed
167 168
    m->mbmi.uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc,
        pbi->common.kf_uv_mode_prob);
169
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
170
}
John Koleszar's avatar
John Koleszar committed
171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237

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);
}

238 239
// Read the referncence frame
static MV_REFERENCE_FRAME read_ref_frame( VP8D_COMP *pbi,
Paul Wilkins's avatar
Paul Wilkins committed
240
                                          vp8_reader *const bc,
241 242 243
                                          unsigned char segment_id )
{
    MV_REFERENCE_FRAME ref_frame;
Paul Wilkins's avatar
Paul Wilkins committed
244
    int seg_ref_active;
245

246
//#if CONFIG_SEGFEATURES
247 248
    MACROBLOCKD *const xd = &pbi->mb;

Paul Wilkins's avatar
Paul Wilkins committed
249 250 251
    seg_ref_active = segfeature_active( xd,
                                        segment_id,
                                        SEG_LVL_REF_FRAME );
252

Paul Wilkins's avatar
Paul Wilkins committed
253 254
    // Segment reference frame features not available
    if ( !seg_ref_active )
255 256 257 258 259 260 261 262 263 264 265 266 267 268
    {
        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)));
            }
        }
    }

269
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
    // 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
285
                ref_frame = LAST_FRAME;
Paul Wilkins's avatar
Paul Wilkins committed
286

Paul Wilkins's avatar
Paul Wilkins committed
287
            if ( ref_frame == LAST_FRAME )
Paul Wilkins's avatar
Paul Wilkins committed
288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340
            {
                // 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
                }
            }
        }
    }

341 342
    return (MV_REFERENCE_FRAME)ref_frame;
}
John Koleszar's avatar
John Koleszar committed
343 344 345 346 347 348 349 350

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;
}

351
static B_PREDICTION_MODE sub_mv_ref(vp8_reader *bc, const vp8_prob *p)
John Koleszar's avatar
John Koleszar committed
352 353 354
{
    const int i = vp8_treed_read(bc, vp8_sub_mv_ref_tree, p);

355
    return (B_PREDICTION_MODE)i;
John Koleszar's avatar
John Koleszar committed
356
}
Scott LaVarnway's avatar
Scott LaVarnway committed
357 358

#ifdef VPX_MODE_COUNT
John Koleszar's avatar
John Koleszar committed
359 360 361 362 363 364 365 366
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
367
#endif
John Koleszar's avatar
John Koleszar committed
368

369 370
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
371 372 373 374 375
    { 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
376 377 378



379
static void mb_mode_mv_init(VP8D_COMP *pbi)
Scott LaVarnway's avatar
Scott LaVarnway committed
380 381 382
{
    vp8_reader *const bc = & pbi->bc;
    MV_CONTEXT *const mvc = pbi->common.fc.mvc;
John Koleszar's avatar
John Koleszar committed
383

384 385 386 387 388 389
#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
390 391 392
    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
393

Scott LaVarnway's avatar
Scott LaVarnway committed
394
    if(pbi->common.frame_type != KEY_FRAME)
John Koleszar's avatar
John Koleszar committed
395
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
396 397 398
        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
399

Scott LaVarnway's avatar
Scott LaVarnway committed
400
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
401
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
402
            int i = 0;
John Koleszar's avatar
John Koleszar committed
403

Scott LaVarnway's avatar
Scott LaVarnway committed
404 405 406 407 408 409
            do
            {
                pbi->common.fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
            }
            while (++i < 4);
        }
John Koleszar's avatar
John Koleszar committed
410

Scott LaVarnway's avatar
Scott LaVarnway committed
411
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
412
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
413 414 415 416 417 418 419
            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
420 421
        }

Scott LaVarnway's avatar
Scott LaVarnway committed
422
        read_mvcontexts(bc, mvc);
John Koleszar's avatar
John Koleszar committed
423
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
424
}
John Koleszar's avatar
John Koleszar committed
425

426

427
static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi,
Scott LaVarnway's avatar
Scott LaVarnway committed
428 429 430 431 432
                            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;
433
    MACROBLOCKD *const xd  = & pbi->mb;
434

435
    int pred_context;
436
    int index = mb_row * pbi->common.mb_cols + mb_col;
Scott LaVarnway's avatar
Scott LaVarnway committed
437
    int_mv *const mv = & mbmi->mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
438 439 440 441 442
    int mb_to_left_edge;
    int mb_to_right_edge;
    int mb_to_top_edge;
    int mb_to_bottom_edge;

443 444
    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
445 446 447
    mb_to_top_edge -= LEFT_TOP_MARGIN;
    mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
    mbmi->need_to_clamp_mvs = 0;
448 449 450
    /* 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
     */
451
    xd->mb_to_left_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
452 453 454
    mb_to_left_edge = -((mb_col * 16) << 3);
    mb_to_left_edge -= LEFT_TOP_MARGIN;

455
    xd->mb_to_right_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
456 457 458
    mb_to_right_edge = ((pbi->common.mb_cols - 1 - mb_col) * 16) << 3;
    mb_to_right_edge += RIGHT_BOTTOM_MARGIN;

459
    /* If required read in new segmentation data for this MB */
460
    if (xd->update_mb_segmentation_map)
461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482
    {
        // Is temporal coding of the segment id for this mb enabled.
        if (xd->temporal_update)
        {
            // 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 +=
                    (mi-pbi->common.mb_cols)->mbmi.seg_id_predicted;

            mbmi->seg_id_predicted =
                vp8_read(bc,
                         xd->mb_segment_pred_probs[pred_context]);

            if ( mbmi->seg_id_predicted )
            {
                mbmi->segment_id = pbi->segmentation_map[index];
            }
            // If the segment id was not predicted decode it explicitly
            else
483
            {
Paul Wilkins's avatar
Paul Wilkins committed
484
                vp8_read_mb_segid(bc, &mi->mbmi, xd);
485
                pbi->segmentation_map[index] = mbmi->segment_id;
486
            }
John Koleszar's avatar
John Koleszar committed
487

488 489 490 491 492 493 494 495 496 497 498
        }
        // Normal unpredicted coding mode
        else
        {
            vp8_read_mb_segid(bc, &mi->mbmi, xd);
            pbi->segmentation_map[index] = mbmi->segment_id;
        }
        index++;

    }

499
//#if CONFIG_SEGFEATURES
500 501 502
    if ( pbi->common.mb_no_coeff_skip &&
         ( !segfeature_active( xd,
                               mbmi->segment_id, SEG_LVL_EOB ) ||
Paul Wilkins's avatar
Paul Wilkins committed
503
           (get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) != 0) ) )
504 505 506
    {
        // Read the macroblock coeff skip flag if this feature is in use,
        // else default to 0
Scott LaVarnway's avatar
Scott LaVarnway committed
507
        mbmi->mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
508
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
509
    else
510
    {
511
//#if CONFIG_SEGFEATURES
512 513
        if ( segfeature_active( xd,
                                mbmi->segment_id, SEG_LVL_EOB ) &&
Paul Wilkins's avatar
Paul Wilkins committed
514
             (get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) == 0) )
515 516 517 518 519 520
        {
            mbmi->mb_skip_coeff = 1;
        }
        else
            mbmi->mb_skip_coeff = 0;
    }
John Koleszar's avatar
John Koleszar committed
521

522
    // Read the reference frame
Paul Wilkins's avatar
Paul Wilkins committed
523
    mbmi->ref_frame = read_ref_frame( pbi, bc, mbmi->segment_id );
524 525 526

    // If reference frame is an Inter frame
    if (mbmi->ref_frame)
John Koleszar's avatar
John Koleszar committed
527
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
528
        int rct[4];
Scott LaVarnway's avatar
Scott LaVarnway committed
529
        int_mv nearest, nearby, best_mv;
530
        vp8_prob mv_ref_p [VP8_MVREFS-1];
John Koleszar's avatar
John Koleszar committed
531

532 533 534 535
        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);

536
//#if CONFIG_SEGFEATURES
537
        // Is the segment level mode feature enabled for this segment
538
        if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
John Koleszar's avatar
John Koleszar committed
539
        {
540
            mbmi->mode =
Paul Wilkins's avatar
Paul Wilkins committed
541
                get_segdata( xd, mbmi->segment_id, SEG_LVL_MODE );
John Koleszar's avatar
John Koleszar committed
542
        }
543 544 545 546
        else
        {
            mbmi->mode = read_mv_ref(bc, mv_ref_p);
        }
John Koleszar's avatar
John Koleszar committed
547

Scott LaVarnway's avatar
Scott LaVarnway committed
548
        mbmi->uv_mode = DC_PRED;
549
        switch (mbmi->mode)
John Koleszar's avatar
John Koleszar committed
550
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
551 552 553 554 555 556
        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
557

Scott LaVarnway's avatar
Scott LaVarnway committed
558 559
            do  /* for each subset j */
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
560
                int_mv leftmv, abovemv;
Scott LaVarnway's avatar
Scott LaVarnway committed
561
                int_mv blockmv;
Scott LaVarnway's avatar
Scott LaVarnway committed
562 563 564
                int k;  /* first block in subset j */
                int mv_contz;
                k = vp8_mbsplit_offset[s][j];
John Koleszar's avatar
John Koleszar committed
565

Scott LaVarnway's avatar
Scott LaVarnway committed
566 567
                leftmv.as_int = left_block_mv(mi, k);
                abovemv.as_int = above_block_mv(mi, k, mis);
568
                mv_contz = vp8_mv_cont(&leftmv, &abovemv);
John Koleszar's avatar
John Koleszar committed
569

570
                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
571
                {
Scott LaVarnway's avatar
Scott LaVarnway committed
572
                case NEW4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
573 574 575
                    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
576 577 578 579 580
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][3]++;
  #endif
                    break;
                case LEFT4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
581
                    blockmv.as_int = leftmv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
582 583 584 585 586
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][0]++;
  #endif
                    break;
                case ABOVE4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
587
                    blockmv.as_int = abovemv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
588 589 590 591 592
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][1]++;
  #endif
                    break;
                case ZERO4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
593
                    blockmv.as_int = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
594 595 596 597 598 599
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][2]++;
  #endif
                    break;
                default:
                    break;
John Koleszar's avatar
John Koleszar committed
600 601
                }

Scott LaVarnway's avatar
Scott LaVarnway committed
602
                mbmi->need_to_clamp_mvs = vp8_check_mv_bounds(&blockmv,
Scott LaVarnway's avatar
Scott LaVarnway committed
603 604 605 606
                                                          mb_to_left_edge,
                                                          mb_to_right_edge,
                                                          mb_to_top_edge,
                                                          mb_to_bottom_edge);
John Koleszar's avatar
John Koleszar committed
607 608

                {
Scott LaVarnway's avatar
Scott LaVarnway committed
609 610 611
                    /* Fill (uniform) modes, mvs of jth subset.
                     Must do it here because ensuing subsets can
                     refer back to us via "left" or "above". */
612 613
                    const unsigned char *fill_offset;
                    unsigned int fill_count = mbsplit_fill_count[s];
John Koleszar's avatar
John Koleszar committed
614

615
                    fill_offset = &mbsplit_fill_offset[s][(unsigned char)j * mbsplit_fill_count[s]];
John Koleszar's avatar
John Koleszar committed
616

Scott LaVarnway's avatar
Scott LaVarnway committed
617
                    do {
Scott LaVarnway's avatar
Scott LaVarnway committed
618
                        mi->bmi[ *fill_offset].mv.as_int = blockmv.as_int;
619
                        fill_offset++;
Scott LaVarnway's avatar
Scott LaVarnway committed
620
                    }while (--fill_count);
John Koleszar's avatar
John Koleszar committed
621 622 623
                }

            }
Scott LaVarnway's avatar
Scott LaVarnway committed
624 625
            while (++j < num_p);
        }
John Koleszar's avatar
John Koleszar committed
626

Scott LaVarnway's avatar
Scott LaVarnway committed
627
        mv->as_int = mi->bmi[15].mv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
628 629 630 631

        break;  /* done with SPLITMV */

        case NEARMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
632
            mv->as_int = nearby.as_int;
633
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
634 635
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
636
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
637 638

        case NEARESTMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
639
            mv->as_int = nearest.as_int;
640
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
641 642
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
643
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
644 645

        case ZEROMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
646
            mv->as_int = 0;
647
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
648 649

        case NEWMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
650 651 652
            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
653 654 655 656 657 658

            /* 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
659 660 661 662 663
            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);
664

665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
        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
688 689 690 691 692 693 694 695
        default:;
  #if CONFIG_DEBUG
            assert(0);
  #endif
        }
    }
    else
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
696 697
        /* required for left and above block mv */
        mbmi->mv.as_int = 0;
John Koleszar's avatar
John Koleszar committed
698

699
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
700 701 702 703 704 705 706 707 708 709 710
        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
711
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
712
            int j = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
713 714
            do
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
715
                mi->bmi[j].as_mode = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob);
Scott LaVarnway's avatar
Scott LaVarnway committed
716 717 718
            }
            while (++j < 16);
        }
John Koleszar's avatar
John Koleszar committed
719

Scott LaVarnway's avatar
Scott LaVarnway committed
720 721
        mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, pbi->common.fc.uv_mode_prob);
    }
John Koleszar's avatar
John Koleszar committed
722

Scott LaVarnway's avatar
Scott LaVarnway committed
723
}
John Koleszar's avatar
John Koleszar committed
724

Scott LaVarnway's avatar
Scott LaVarnway committed
725 726 727 728
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
729

730
//#if CONFIG_SEGFEATURES
731 732 733 734 735 736
#if 0
    FILE *statsfile;
    statsfile = fopen("decsegmap.stt", "a");
    fprintf(statsfile, "\n" );
#endif

737
    mb_mode_mv_init(pbi);
John Koleszar's avatar
John Koleszar committed
738

739 740 741 742 743 744 745
#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
746 747 748 749 750
    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
751

Scott LaVarnway's avatar
Scott LaVarnway committed
752 753 754
        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
755

Scott LaVarnway's avatar
Scott LaVarnway committed
756 757 758
        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
759

760
//#if CONFIG_SEGFEATURES
761 762 763 764
#if 0
        fprintf(statsfile, "\n" );
#endif

Scott LaVarnway's avatar
Scott LaVarnway committed
765 766
        while (++mb_col < pbi->common.mb_cols)
        {
767
#if CONFIG_ERROR_CONCEALMENT
768
            int mb_num = mb_row * pbi->common.mb_cols + mb_col;
769
#endif
770
            /*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
771 772
            if(pbi->common.frame_type == KEY_FRAME)
                vp8_kfread_modes(pbi, mi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
773
            else
774
                read_mb_modes_mv(pbi, mi, &mi->mbmi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
775

Yaowu Xu's avatar
Yaowu Xu committed
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791
            //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);
            }
            */
792 793 794 795 796 797 798 799 800 801 802 803 804
#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

805
//#if CONFIG_SEGFEATURES
806 807 808 809
#if 0
            fprintf(statsfile, "%2d%2d%2d   ",
                mi->mbmi.segment_id, mi->mbmi.ref_frame, mi->mbmi.mode );
#endif
810

811

812
            mi++;       /* next macroblock */
John Koleszar's avatar
John Koleszar committed
813
        }
Yaowu Xu's avatar
Yaowu Xu committed
814
       // printf("\n");
815
        mi++;           /* skip left predictor each row */
John Koleszar's avatar
John Koleszar committed
816
    }
817

818
//#if CONFIG_SEGFEATURES
819 820 821
#if 0
    fclose(statsfile);
#endif
822

823

John Koleszar's avatar
John Koleszar committed
824
}