decodemv.c 25.4 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 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];
Scott LaVarnway's avatar
Scott LaVarnway committed
77 78 79 80 81 82 83 84
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;

85 86 87
            /* 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
88 89 90
            m->mbmi.segment_id = 0;

            if (pbi->mb.update_mb_segmentation_map)
Paul Wilkins's avatar
Paul Wilkins committed
91
                vp8_read_mb_segid(bc, &m->mbmi, &pbi->mb);
Scott LaVarnway's avatar
Scott LaVarnway committed
92

93
//#if CONFIG_SEGFEATURES
94 95 96
            if ( pbi->common.mb_no_coeff_skip &&
                 ( !segfeature_active( &pbi->mb,
                                       m->mbmi.segment_id, SEG_LVL_EOB ) ||
Paul Wilkins's avatar
Paul Wilkins committed
97 98
                   ( get_segdata( &pbi->mb,
                                  m->mbmi.segment_id, SEG_LVL_EOB ) != 0 ) ) )
99
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
100
                m->mbmi.mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
101
            }
Scott LaVarnway's avatar
Scott LaVarnway committed
102
            else
103
            {
104
//#if CONFIG_SEGFEATURES
105 106
                if ( segfeature_active( &pbi->mb,
                                        m->mbmi.segment_id, SEG_LVL_EOB ) &&
Paul Wilkins's avatar
Paul Wilkins committed
107 108
                     ( get_segdata( &pbi->mb,
                                    m->mbmi.segment_id, SEG_LVL_EOB ) == 0 ) )
109 110 111 112 113 114 115
                {
                    m->mbmi.mb_skip_coeff = 1;
                }
                else
                    m->mbmi.mb_skip_coeff = 0;
            }

116 117
#if CONFIG_QIMODE
            y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc,
118
                pbi->common.kf_ymode_prob[pbi->common.kf_ymode_probs_index]);
119
#else
Scott LaVarnway's avatar
Scott LaVarnway committed
120
            y_mode = (MB_PREDICTION_MODE) vp8_kfread_ymode(bc, pbi->common.kf_ymode_prob);
121
#endif
Scott LaVarnway's avatar
Scott LaVarnway committed
122 123 124 125 126 127 128
            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
129 130
                    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
131

Scott LaVarnway's avatar
Scott LaVarnway committed
132
                    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
133 134 135
                }
                while (++i < 16);
            }
Yaowu Xu's avatar
Yaowu Xu committed
136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
#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
156 157 158 159 160 161 162
#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
163 164
        }
}
John Koleszar's avatar
John Koleszar committed
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231

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);
}

232 233
// Read the referncence frame
static MV_REFERENCE_FRAME read_ref_frame( VP8D_COMP *pbi,
Paul Wilkins's avatar
Paul Wilkins committed
234
                                          vp8_reader *const bc,
235 236 237
                                          unsigned char segment_id )
{
    MV_REFERENCE_FRAME ref_frame;
Paul Wilkins's avatar
Paul Wilkins committed
238
    int seg_ref_active;
239

240
//#if CONFIG_SEGFEATURES
241 242
    MACROBLOCKD *const xd = &pbi->mb;

Paul Wilkins's avatar
Paul Wilkins committed
243 244 245
    seg_ref_active = segfeature_active( xd,
                                        segment_id,
                                        SEG_LVL_REF_FRAME );
246

Paul Wilkins's avatar
Paul Wilkins committed
247 248
    // Segment reference frame features not available
    if ( !seg_ref_active )
249 250 251 252 253 254 255 256 257 258 259 260 261 262
    {
        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)));
            }
        }
    }

263
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278
    // 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
279
                ref_frame = LAST_FRAME;
Paul Wilkins's avatar
Paul Wilkins committed
280

Paul Wilkins's avatar
Paul Wilkins committed
281
            if ( ref_frame == LAST_FRAME )
Paul Wilkins's avatar
Paul Wilkins committed
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
            {
                // 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
                }
            }
        }
    }

335 336
    return (MV_REFERENCE_FRAME)ref_frame;
}
John Koleszar's avatar
John Koleszar committed
337 338 339 340 341 342 343 344

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;
}

345
static B_PREDICTION_MODE sub_mv_ref(vp8_reader *bc, const vp8_prob *p)
John Koleszar's avatar
John Koleszar committed
346 347 348
{
    const int i = vp8_treed_read(bc, vp8_sub_mv_ref_tree, p);

349
    return (B_PREDICTION_MODE)i;
John Koleszar's avatar
John Koleszar committed
350
}
Scott LaVarnway's avatar
Scott LaVarnway committed
351 352

#ifdef VPX_MODE_COUNT
John Koleszar's avatar
John Koleszar committed
353 354 355 356 357 358 359 360
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
361
#endif
John Koleszar's avatar
John Koleszar committed
362

363 364
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
365 366 367 368 369
    { 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
370 371 372



373
static void mb_mode_mv_init(VP8D_COMP *pbi)
Scott LaVarnway's avatar
Scott LaVarnway committed
374 375 376
{
    vp8_reader *const bc = & pbi->bc;
    MV_CONTEXT *const mvc = pbi->common.fc.mvc;
John Koleszar's avatar
John Koleszar committed
377

378 379 380 381 382 383
#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
384 385 386
    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
387

Scott LaVarnway's avatar
Scott LaVarnway committed
388
    if(pbi->common.frame_type != KEY_FRAME)
John Koleszar's avatar
John Koleszar committed
389
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
390 391 392
        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
393

Scott LaVarnway's avatar
Scott LaVarnway committed
394
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
395
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
396
            int i = 0;
John Koleszar's avatar
John Koleszar committed
397

Scott LaVarnway's avatar
Scott LaVarnway committed
398 399 400 401 402 403
            do
            {
                pbi->common.fc.ymode_prob[i] = (vp8_prob) vp8_read_literal(bc, 8);
            }
            while (++i < 4);
        }
John Koleszar's avatar
John Koleszar committed
404

Scott LaVarnway's avatar
Scott LaVarnway committed
405
        if (vp8_read_bit(bc))
John Koleszar's avatar
John Koleszar committed
406
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
407 408 409 410 411 412 413
            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
414 415
        }

Scott LaVarnway's avatar
Scott LaVarnway committed
416
        read_mvcontexts(bc, mvc);
John Koleszar's avatar
John Koleszar committed
417
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
418
}
John Koleszar's avatar
John Koleszar committed
419

420

421
static void read_mb_modes_mv(VP8D_COMP *pbi, MODE_INFO *mi, MB_MODE_INFO *mbmi,
Scott LaVarnway's avatar
Scott LaVarnway committed
422 423 424 425 426
                            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;
427
    MACROBLOCKD *const xd  = & pbi->mb;
428

429
    int pred_context;
430
    int index = mb_row * pbi->common.mb_cols + mb_col;
Scott LaVarnway's avatar
Scott LaVarnway committed
431
    int_mv *const mv = & mbmi->mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
432 433 434 435 436
    int mb_to_left_edge;
    int mb_to_right_edge;
    int mb_to_top_edge;
    int mb_to_bottom_edge;

437 438
    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
439 440 441
    mb_to_top_edge -= LEFT_TOP_MARGIN;
    mb_to_bottom_edge += RIGHT_BOTTOM_MARGIN;
    mbmi->need_to_clamp_mvs = 0;
442 443 444
    /* 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
     */
445
    xd->mb_to_left_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
446 447 448
    mb_to_left_edge = -((mb_col * 16) << 3);
    mb_to_left_edge -= LEFT_TOP_MARGIN;

449
    xd->mb_to_right_edge =
Scott LaVarnway's avatar
Scott LaVarnway committed
450 451 452
    mb_to_right_edge = ((pbi->common.mb_cols - 1 - mb_col) * 16) << 3;
    mb_to_right_edge += RIGHT_BOTTOM_MARGIN;

453
    /* If required read in new segmentation data for this MB */
454
    if (xd->update_mb_segmentation_map)
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476
    {
        // 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
477
            {
Paul Wilkins's avatar
Paul Wilkins committed
478
                vp8_read_mb_segid(bc, &mi->mbmi, xd);
479
                pbi->segmentation_map[index] = mbmi->segment_id;
480
            }
John Koleszar's avatar
John Koleszar committed
481

482 483 484 485 486 487 488 489 490 491 492
        }
        // Normal unpredicted coding mode
        else
        {
            vp8_read_mb_segid(bc, &mi->mbmi, xd);
            pbi->segmentation_map[index] = mbmi->segment_id;
        }
        index++;

    }

493
//#if CONFIG_SEGFEATURES
494 495 496
    if ( pbi->common.mb_no_coeff_skip &&
         ( !segfeature_active( xd,
                               mbmi->segment_id, SEG_LVL_EOB ) ||
Paul Wilkins's avatar
Paul Wilkins committed
497
           (get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) != 0) ) )
498 499 500
    {
        // Read the macroblock coeff skip flag if this feature is in use,
        // else default to 0
Scott LaVarnway's avatar
Scott LaVarnway committed
501
        mbmi->mb_skip_coeff = vp8_read(bc, pbi->prob_skip_false);
502
    }
Scott LaVarnway's avatar
Scott LaVarnway committed
503
    else
504
    {
505
//#if CONFIG_SEGFEATURES
506 507
        if ( segfeature_active( xd,
                                mbmi->segment_id, SEG_LVL_EOB ) &&
Paul Wilkins's avatar
Paul Wilkins committed
508
             (get_segdata( xd, mbmi->segment_id, SEG_LVL_EOB ) == 0) )
509 510 511 512 513 514
        {
            mbmi->mb_skip_coeff = 1;
        }
        else
            mbmi->mb_skip_coeff = 0;
    }
John Koleszar's avatar
John Koleszar committed
515

516
    // Read the reference frame
Paul Wilkins's avatar
Paul Wilkins committed
517
    mbmi->ref_frame = read_ref_frame( pbi, bc, mbmi->segment_id );
518 519 520

    // If reference frame is an Inter frame
    if (mbmi->ref_frame)
John Koleszar's avatar
John Koleszar committed
521
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
522
        int rct[4];
Scott LaVarnway's avatar
Scott LaVarnway committed
523
        int_mv nearest, nearby, best_mv;
524
        vp8_prob mv_ref_p [VP8_MVREFS-1];
John Koleszar's avatar
John Koleszar committed
525

526 527 528 529
        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);

530
//#if CONFIG_SEGFEATURES
531
        // Is the segment level mode feature enabled for this segment
532
        if ( segfeature_active( xd, mbmi->segment_id, SEG_LVL_MODE ) )
John Koleszar's avatar
John Koleszar committed
533
        {
534
            mbmi->mode =
Paul Wilkins's avatar
Paul Wilkins committed
535
                get_segdata( xd, mbmi->segment_id, SEG_LVL_MODE );
John Koleszar's avatar
John Koleszar committed
536
        }
537 538 539 540
        else
        {
            mbmi->mode = read_mv_ref(bc, mv_ref_p);
        }
John Koleszar's avatar
John Koleszar committed
541

Scott LaVarnway's avatar
Scott LaVarnway committed
542
        mbmi->uv_mode = DC_PRED;
543
        switch (mbmi->mode)
John Koleszar's avatar
John Koleszar committed
544
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
545 546 547 548 549 550
        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
551

Scott LaVarnway's avatar
Scott LaVarnway committed
552 553
            do  /* for each subset j */
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
554
                int_mv leftmv, abovemv;
Scott LaVarnway's avatar
Scott LaVarnway committed
555
                int_mv blockmv;
Scott LaVarnway's avatar
Scott LaVarnway committed
556 557 558
                int k;  /* first block in subset j */
                int mv_contz;
                k = vp8_mbsplit_offset[s][j];
John Koleszar's avatar
John Koleszar committed
559

Scott LaVarnway's avatar
Scott LaVarnway committed
560 561
                leftmv.as_int = left_block_mv(mi, k);
                abovemv.as_int = above_block_mv(mi, k, mis);
562
                mv_contz = vp8_mv_cont(&leftmv, &abovemv);
John Koleszar's avatar
John Koleszar committed
563

564
                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
565
                {
Scott LaVarnway's avatar
Scott LaVarnway committed
566
                case NEW4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
567 568 569
                    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
570 571 572 573 574
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][3]++;
  #endif
                    break;
                case LEFT4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
575
                    blockmv.as_int = leftmv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
576 577 578 579 580
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][0]++;
  #endif
                    break;
                case ABOVE4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
581
                    blockmv.as_int = abovemv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
582 583 584 585 586
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][1]++;
  #endif
                    break;
                case ZERO4X4:
Scott LaVarnway's avatar
Scott LaVarnway committed
587
                    blockmv.as_int = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
588 589 590 591 592 593
  #ifdef VPX_MODE_COUNT
                    vp8_mv_cont_count[mv_contz][2]++;
  #endif
                    break;
                default:
                    break;
John Koleszar's avatar
John Koleszar committed
594 595
                }

Scott LaVarnway's avatar
Scott LaVarnway committed
596
                mbmi->need_to_clamp_mvs = vp8_check_mv_bounds(&blockmv,
Scott LaVarnway's avatar
Scott LaVarnway committed
597 598 599 600
                                                          mb_to_left_edge,
                                                          mb_to_right_edge,
                                                          mb_to_top_edge,
                                                          mb_to_bottom_edge);
John Koleszar's avatar
John Koleszar committed
601 602

                {
Scott LaVarnway's avatar
Scott LaVarnway committed
603 604 605
                    /* Fill (uniform) modes, mvs of jth subset.
                     Must do it here because ensuing subsets can
                     refer back to us via "left" or "above". */
606 607
                    const unsigned char *fill_offset;
                    unsigned int fill_count = mbsplit_fill_count[s];
John Koleszar's avatar
John Koleszar committed
608

609
                    fill_offset = &mbsplit_fill_offset[s][(unsigned char)j * mbsplit_fill_count[s]];
John Koleszar's avatar
John Koleszar committed
610

Scott LaVarnway's avatar
Scott LaVarnway committed
611
                    do {
Scott LaVarnway's avatar
Scott LaVarnway committed
612
                        mi->bmi[ *fill_offset].mv.as_int = blockmv.as_int;
613
                        fill_offset++;
Scott LaVarnway's avatar
Scott LaVarnway committed
614
                    }while (--fill_count);
John Koleszar's avatar
John Koleszar committed
615 616 617
                }

            }
Scott LaVarnway's avatar
Scott LaVarnway committed
618 619
            while (++j < num_p);
        }
John Koleszar's avatar
John Koleszar committed
620

Scott LaVarnway's avatar
Scott LaVarnway committed
621
        mv->as_int = mi->bmi[15].mv.as_int;
Scott LaVarnway's avatar
Scott LaVarnway committed
622 623 624 625

        break;  /* done with SPLITMV */

        case NEARMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
626
            mv->as_int = nearby.as_int;
627
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
628 629
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
630
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
631 632

        case NEARESTMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
633
            mv->as_int = nearest.as_int;
634
            /* Clip "next_nearest" so that it does not extend to far out of image */
Scott LaVarnway's avatar
Scott LaVarnway committed
635 636
            vp8_clamp_mv(mv, mb_to_left_edge, mb_to_right_edge,
                         mb_to_top_edge, mb_to_bottom_edge);
637
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
638 639

        case ZEROMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
640
            mv->as_int = 0;
641
            goto propagate_mv;
Scott LaVarnway's avatar
Scott LaVarnway committed
642 643

        case NEWMV:
Scott LaVarnway's avatar
Scott LaVarnway committed
644 645 646
            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
647 648 649 650 651 652

            /* 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
653 654 655 656 657
            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);
658

659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681
        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
682 683 684 685 686 687 688 689
        default:;
  #if CONFIG_DEBUG
            assert(0);
  #endif
        }
    }
    else
    {
Scott LaVarnway's avatar
Scott LaVarnway committed
690 691
        /* required for left and above block mv */
        mbmi->mv.as_int = 0;
John Koleszar's avatar
John Koleszar committed
692

693
//#if CONFIG_SEGFEATURES
Paul Wilkins's avatar
Paul Wilkins committed
694 695 696 697 698 699 700 701 702 703 704
        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
705
        {
Scott LaVarnway's avatar
Scott LaVarnway committed
706
            int j = 0;
Scott LaVarnway's avatar
Scott LaVarnway committed
707 708
            do
            {
Scott LaVarnway's avatar
Scott LaVarnway committed
709
                mi->bmi[j].as_mode = (B_PREDICTION_MODE)vp8_read_bmode(bc, pbi->common.fc.bmode_prob);
Scott LaVarnway's avatar
Scott LaVarnway committed
710 711 712
            }
            while (++j < 16);
        }
John Koleszar's avatar
John Koleszar committed
713

Scott LaVarnway's avatar
Scott LaVarnway committed
714 715
        mbmi->uv_mode = (MB_PREDICTION_MODE)vp8_read_uv_mode(bc, pbi->common.fc.uv_mode_prob);
    }
John Koleszar's avatar
John Koleszar committed
716

Scott LaVarnway's avatar
Scott LaVarnway committed
717
}
John Koleszar's avatar
John Koleszar committed
718

Scott LaVarnway's avatar
Scott LaVarnway committed
719 720 721 722
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
723

724
//#if CONFIG_SEGFEATURES
725 726 727 728 729 730
#if 0
    FILE *statsfile;
    statsfile = fopen("decsegmap.stt", "a");
    fprintf(statsfile, "\n" );
#endif

731
    mb_mode_mv_init(pbi);
John Koleszar's avatar
John Koleszar committed
732

733 734 735 736 737 738 739
#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
740 741 742 743 744
    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
745

Scott LaVarnway's avatar
Scott LaVarnway committed
746 747 748
        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
749

Scott LaVarnway's avatar
Scott LaVarnway committed
750 751 752
        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
753

754
//#if CONFIG_SEGFEATURES
755 756 757 758
#if 0
        fprintf(statsfile, "\n" );
#endif

Scott LaVarnway's avatar
Scott LaVarnway committed
759 760
        while (++mb_col < pbi->common.mb_cols)
        {
761
#if CONFIG_ERROR_CONCEALMENT
762
            int mb_num = mb_row * pbi->common.mb_cols + mb_col;
763
#endif
764
            /*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
765 766
            if(pbi->common.frame_type == KEY_FRAME)
                vp8_kfread_modes(pbi, mi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
767
            else
768
                read_mb_modes_mv(pbi, mi, &mi->mbmi, mb_row, mb_col);
John Koleszar's avatar
John Koleszar committed
769

Yaowu Xu's avatar
Yaowu Xu committed
770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785
            //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);
            }
            */
786 787 788 789 790 791 792 793 794 795 796 797 798
#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

799
//#if CONFIG_SEGFEATURES
800 801 802 803
#if 0
            fprintf(statsfile, "%2d%2d%2d   ",
                mi->mbmi.segment_id, mi->mbmi.ref_frame, mi->mbmi.mode );
#endif
804

805

806
            mi++;       /* next macroblock */
John Koleszar's avatar
John Koleszar committed
807
        }
Yaowu Xu's avatar
Yaowu Xu committed
808
       // printf("\n");
809
        mi++;           /* skip left predictor each row */
John Koleszar's avatar
John Koleszar committed
810
    }
811

812
//#if CONFIG_SEGFEATURES
813 814 815
#if 0
    fclose(statsfile);
#endif
816

817

John Koleszar's avatar
John Koleszar committed
818
}