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1
/*
2
 * VC-1 and WMV3 decoder common code
3
 * Copyright (c) 2006-2007 Konstantin Shishkov
4
 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
22

    
23
/**
24
 * @file
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 * VC-1 and WMV3 decoder common code
26
 *
27
 */
28
#include "internal.h"
29
#include "dsputil.h"
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#include "avcodec.h"
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#include "mpegvideo.h"
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#include "vc1.h"
33
#include "vc1data.h"
34
#include "msmpeg4data.h"
35
#include "unary.h"
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#include "simple_idct.h"
37

    
38
#undef NDEBUG
39
#include <assert.h>
40

    
41
/***********************************************************************/
42
/**
43
 * @defgroup vc1bitplane VC-1 Bitplane decoding
44
 * @see 8.7, p56
45
 * @{
46
 */
47

    
48
/**
49
 * Imode types
50
 * @{
51
 */
52
enum Imode {
53
    IMODE_RAW,
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    IMODE_NORM2,
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    IMODE_DIFF2,
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    IMODE_NORM6,
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    IMODE_DIFF6,
58
    IMODE_ROWSKIP,
59
    IMODE_COLSKIP
60
};
61
/** @} */ //imode defines
62

    
63
/** Decode rows by checking if they are skipped
64
 * @param plane Buffer to store decoded bits
65
 * @param[in] width Width of this buffer
66
 * @param[in] height Height of this buffer
67
 * @param[in] stride of this buffer
68
 */
69
static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
70
    int x, y;
71

    
72
    for (y=0; y<height; y++){
73
        if (!get_bits1(gb)) //rowskip
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            memset(plane, 0, width);
75
        else
76
            for (x=0; x<width; x++)
77
                plane[x] = get_bits1(gb);
78
        plane += stride;
79
    }
80
}
81

    
82
/** Decode columns by checking if they are skipped
83
 * @param plane Buffer to store decoded bits
84
 * @param[in] width Width of this buffer
85
 * @param[in] height Height of this buffer
86
 * @param[in] stride of this buffer
87
 * @todo FIXME: Optimize
88
 */
89
static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
90
    int x, y;
91

    
92
    for (x=0; x<width; x++){
93
        if (!get_bits1(gb)) //colskip
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            for (y=0; y<height; y++)
95
                plane[y*stride] = 0;
96
        else
97
            for (y=0; y<height; y++)
98
                plane[y*stride] = get_bits1(gb);
99
        plane ++;
100
    }
101
}
102

    
103
/** Decode a bitplane's bits
104
 * @param data bitplane where to store the decode bits
105
 * @param[out] raw_flag pointer to the flag indicating that this bitplane is not coded explicitly
106
 * @param v VC-1 context for bit reading and logging
107
 * @return Status
108
 * @todo FIXME: Optimize
109
 */
110
static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
111
{
112
    GetBitContext *gb = &v->s.gb;
113

    
114
    int imode, x, y, code, offset;
115
    uint8_t invert, *planep = data;
116
    int width, height, stride;
117

    
118
    width = v->s.mb_width;
119
    height = v->s.mb_height;
120
    stride = v->s.mb_stride;
121
    invert = get_bits1(gb);
122
    imode = get_vlc2(gb, ff_vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
123

    
124
    *raw_flag = 0;
125
    switch (imode)
126
    {
127
    case IMODE_RAW:
128
        //Data is actually read in the MB layer (same for all tests == "raw")
129
        *raw_flag = 1; //invert ignored
130
        return invert;
131
    case IMODE_DIFF2:
132
    case IMODE_NORM2:
133
        if ((height * width) & 1)
134
        {
135
            *planep++ = get_bits1(gb);
136
            offset = 1;
137
        }
138
        else offset = 0;
139
        // decode bitplane as one long line
140
        for (y = offset; y < height * width; y += 2) {
141
            code = get_vlc2(gb, ff_vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
142
            *planep++ = code & 1;
143
            offset++;
144
            if(offset == width) {
145
                offset = 0;
146
                planep += stride - width;
147
            }
148
            *planep++ = code >> 1;
149
            offset++;
150
            if(offset == width) {
151
                offset = 0;
152
                planep += stride - width;
153
            }
154
        }
155
        break;
156
    case IMODE_DIFF6:
157
    case IMODE_NORM6:
158
        if(!(height % 3) && (width % 3)) { // use 2x3 decoding
159
            for(y = 0; y < height; y+= 3) {
160
                for(x = width & 1; x < width; x += 2) {
161
                    code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
162
                    if(code < 0){
163
                        av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
164
                        return -1;
165
                    }
166
                    planep[x + 0] = (code >> 0) & 1;
167
                    planep[x + 1] = (code >> 1) & 1;
168
                    planep[x + 0 + stride] = (code >> 2) & 1;
169
                    planep[x + 1 + stride] = (code >> 3) & 1;
170
                    planep[x + 0 + stride * 2] = (code >> 4) & 1;
171
                    planep[x + 1 + stride * 2] = (code >> 5) & 1;
172
                }
173
                planep += stride * 3;
174
            }
175
            if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
176
        } else { // 3x2
177
            planep += (height & 1) * stride;
178
            for(y = height & 1; y < height; y += 2) {
179
                for(x = width % 3; x < width; x += 3) {
180
                    code = get_vlc2(gb, ff_vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
181
                    if(code < 0){
182
                        av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
183
                        return -1;
184
                    }
185
                    planep[x + 0] = (code >> 0) & 1;
186
                    planep[x + 1] = (code >> 1) & 1;
187
                    planep[x + 2] = (code >> 2) & 1;
188
                    planep[x + 0 + stride] = (code >> 3) & 1;
189
                    planep[x + 1 + stride] = (code >> 4) & 1;
190
                    planep[x + 2 + stride] = (code >> 5) & 1;
191
                }
192
                planep += stride * 2;
193
            }
194
            x = width % 3;
195
            if(x) decode_colskip(data  ,             x, height    , stride, &v->s.gb);
196
            if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
197
        }
198
        break;
199
    case IMODE_ROWSKIP:
200
        decode_rowskip(data, width, height, stride, &v->s.gb);
201
        break;
202
    case IMODE_COLSKIP:
203
        decode_colskip(data, width, height, stride, &v->s.gb);
204
        break;
205
    default: break;
206
    }
207

    
208
    /* Applying diff operator */
209
    if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
210
    {
211
        planep = data;
212
        planep[0] ^= invert;
213
        for (x=1; x<width; x++)
214
            planep[x] ^= planep[x-1];
215
        for (y=1; y<height; y++)
216
        {
217
            planep += stride;
218
            planep[0] ^= planep[-stride];
219
            for (x=1; x<width; x++)
220
            {
221
                if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
222
                else                                 planep[x] ^= planep[x-1];
223
            }
224
        }
225
    }
226
    else if (invert)
227
    {
228
        planep = data;
229
        for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
230
    }
231
    return (imode<<1) + invert;
232
}
233

    
234
/** @} */ //Bitplane group
235

    
236
/***********************************************************************/
237
/** VOP Dquant decoding
238
 * @param v VC-1 Context
239
 */
240
static int vop_dquant_decoding(VC1Context *v)
241
{
242
    GetBitContext *gb = &v->s.gb;
243
    int pqdiff;
244

    
245
    //variable size
246
    if (v->dquant == 2)
247
    {
248
        pqdiff = get_bits(gb, 3);
249
        if (pqdiff == 7) v->altpq = get_bits(gb, 5);
250
        else v->altpq = v->pq + pqdiff + 1;
251
    }
252
    else
253
    {
254
        v->dquantfrm = get_bits1(gb);
255
        if ( v->dquantfrm )
256
        {
257
            v->dqprofile = get_bits(gb, 2);
258
            switch (v->dqprofile)
259
            {
260
            case DQPROFILE_SINGLE_EDGE:
261
            case DQPROFILE_DOUBLE_EDGES:
262
                v->dqsbedge = get_bits(gb, 2);
263
                break;
264
            case DQPROFILE_ALL_MBS:
265
                v->dqbilevel = get_bits1(gb);
266
                if(!v->dqbilevel)
267
                    v->halfpq = 0;
268
            default: break; //Forbidden ?
269
            }
270
            if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
271
            {
272
                pqdiff = get_bits(gb, 3);
273
                if (pqdiff == 7) v->altpq = get_bits(gb, 5);
274
                else v->altpq = v->pq + pqdiff + 1;
275
            }
276
        }
277
    }
278
    return 0;
279
}
280

    
281
static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);
282

    
283
static void simple_idct_put_rangered(uint8_t *dest, int line_size, DCTELEM *block)
284
{
285
    int i;
286
    ff_simple_idct(block);
287
    for (i = 0; i < 64; i++) block[i] = (block[i] - 64) << 1;
288
    ff_put_pixels_clamped_c(block, dest, line_size);
289
}
290

    
291
static void simple_idct_put_signed(uint8_t *dest, int line_size, DCTELEM *block)
292
{
293
    ff_simple_idct(block);
294
    ff_put_signed_pixels_clamped_c(block, dest, line_size);
295
}
296

    
297
static void simple_idct_put_signed_rangered(uint8_t *dest, int line_size, DCTELEM *block)
298
{
299
    int i;
300
    ff_simple_idct(block);
301
    for (i = 0; i < 64; i++) block[i] <<= 1;
302
    ff_put_signed_pixels_clamped_c(block, dest, line_size);
303
}
304

    
305
/**
306
 * Decode Simple/Main Profiles sequence header
307
 * @see Figure 7-8, p16-17
308
 * @param avctx Codec context
309
 * @param gb GetBit context initialized from Codec context extra_data
310
 * @return Status
311
 */
312
int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
313
{
314
    av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
315
    v->profile = get_bits(gb, 2);
316
    if (v->profile == PROFILE_COMPLEX)
317
    {
318
        av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n");
319
    }
320

    
321
    if (v->profile == PROFILE_ADVANCED)
322
    {
323
        v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;
324
        v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
325
        return decode_sequence_header_adv(v, gb);
326
    }
327
    else
328
    {
329
        v->zz_8x4 = wmv2_scantableA;
330
        v->zz_4x8 = wmv2_scantableB;
331
        v->res_y411   = get_bits1(gb);
332
        v->res_sprite = get_bits1(gb);
333
        if (v->res_y411)
334
        {
335
            av_log(avctx, AV_LOG_ERROR,
336
                   "Old interlaced mode is not supported\n");
337
            return -1;
338
        }
339
        if (v->res_sprite) {
340
            av_log(avctx, AV_LOG_ERROR, "WMVP is not fully supported\n");
341
        }
342
    }
343

    
344
    // (fps-2)/4 (->30)
345
    v->frmrtq_postproc = get_bits(gb, 3); //common
346
    // (bitrate-32kbps)/64kbps
347
    v->bitrtq_postproc = get_bits(gb, 5); //common
348
    v->s.loop_filter = get_bits1(gb); //common
349
    if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
350
    {
351
        av_log(avctx, AV_LOG_ERROR,
352
               "LOOPFILTER shall not be enabled in Simple Profile\n");
353
    }
354
    if(v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
355
        v->s.loop_filter = 0;
356

    
357
    v->res_x8 = get_bits1(gb); //reserved
358
    v->multires = get_bits1(gb);
359
    v->res_fasttx = get_bits1(gb);
360
    if (!v->res_fasttx)
361
    {
362
        v->vc1dsp.vc1_inv_trans_8x8_add = ff_simple_idct_add;
363
        v->vc1dsp.vc1_inv_trans_8x8_put[0] = ff_simple_idct_put;
364
        v->vc1dsp.vc1_inv_trans_8x8_put[1] = simple_idct_put_rangered;
365
        v->vc1dsp.vc1_inv_trans_8x8_put_signed[0] = simple_idct_put_signed;
366
        v->vc1dsp.vc1_inv_trans_8x8_put_signed[1] = simple_idct_put_signed_rangered;
367
        v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;
368
        v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;
369
        v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;
370
        v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add;
371
        v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;
372
        v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;
373
        v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;
374
    }
375

    
376
    v->fastuvmc =  get_bits1(gb); //common
377
    if (!v->profile && !v->fastuvmc)
378
    {
379
        av_log(avctx, AV_LOG_ERROR,
380
               "FASTUVMC unavailable in Simple Profile\n");
381
        return -1;
382
    }
383
    v->extended_mv =  get_bits1(gb); //common
384
    if (!v->profile && v->extended_mv)
385
    {
386
        av_log(avctx, AV_LOG_ERROR,
387
               "Extended MVs unavailable in Simple Profile\n");
388
        return -1;
389
    }
390
    v->dquant =  get_bits(gb, 2); //common
391
    v->vstransform =  get_bits1(gb); //common
392

    
393
    v->res_transtab = get_bits1(gb);
394
    if (v->res_transtab)
395
    {
396
        av_log(avctx, AV_LOG_ERROR,
397
               "1 for reserved RES_TRANSTAB is forbidden\n");
398
        return -1;
399
    }
400

    
401
    v->overlap = get_bits1(gb); //common
402

    
403
    v->s.resync_marker = get_bits1(gb);
404
    v->rangered = get_bits1(gb);
405
    if (v->rangered && v->profile == PROFILE_SIMPLE)
406
    {
407
        av_log(avctx, AV_LOG_INFO,
408
               "RANGERED should be set to 0 in Simple Profile\n");
409
    }
410

    
411
    v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
412
    v->quantizer_mode = get_bits(gb, 2); //common
413

    
414
    v->finterpflag = get_bits1(gb); //common
415

    
416
    if (v->res_sprite) {
417
        v->s.avctx->width  = v->s.avctx->coded_width  = get_bits(gb, 11);
418
        v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11);
419
        skip_bits(gb, 5); //frame rate
420
        v->res_x8 = get_bits1(gb);
421
        if (get_bits1(gb)) { // something to do with DC VLC selection
422
            av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n");
423
            return -1;
424
        }
425
        skip_bits(gb, 3); //slice code
426
        v->res_rtm_flag = 0;
427
    } else {
428
        v->res_rtm_flag = get_bits1(gb); //reserved
429
    }
430
    if (!v->res_rtm_flag)
431
    {
432
//            av_log(avctx, AV_LOG_ERROR,
433
//                   "0 for reserved RES_RTM_FLAG is forbidden\n");
434
        av_log(avctx, AV_LOG_ERROR,
435
               "Old WMV3 version detected, some frames may be decoded incorrectly\n");
436
        //return -1;
437
    }
438
    //TODO: figure out what they mean (always 0x402F)
439
    if(!v->res_fasttx) skip_bits(gb, 16);
440
    av_log(avctx, AV_LOG_DEBUG,
441
               "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
442
               "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
443
               "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
444
               "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
445
               v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
446
               v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
447
               v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
448
               v->dquant, v->quantizer_mode, avctx->max_b_frames
449
               );
450
    return 0;
451
}
452

    
453
static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
454
{
455
    v->res_rtm_flag = 1;
456
    v->level = get_bits(gb, 3);
457
    if(v->level >= 5)
458
    {
459
        av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
460
    }
461
    v->chromaformat = get_bits(gb, 2);
462
    if (v->chromaformat != 1)
463
    {
464
        av_log(v->s.avctx, AV_LOG_ERROR,
465
               "Only 4:2:0 chroma format supported\n");
466
        return -1;
467
    }
468

    
469
    // (fps-2)/4 (->30)
470
    v->frmrtq_postproc = get_bits(gb, 3); //common
471
    // (bitrate-32kbps)/64kbps
472
    v->bitrtq_postproc = get_bits(gb, 5); //common
473
    v->postprocflag = get_bits1(gb); //common
474

    
475
    v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
476
    v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
477
    v->s.avctx->width = v->s.avctx->coded_width;
478
    v->s.avctx->height = v->s.avctx->coded_height;
479
    v->broadcast = get_bits1(gb);
480
    v->interlace = get_bits1(gb);
481
    v->tfcntrflag = get_bits1(gb);
482
    v->finterpflag = get_bits1(gb);
483
    skip_bits1(gb); // reserved
484

    
485
    v->s.h_edge_pos = v->s.avctx->coded_width;
486
    v->s.v_edge_pos = v->s.avctx->coded_height;
487

    
488
    av_log(v->s.avctx, AV_LOG_DEBUG,
489
               "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
490
               "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
491
               "TFCTRflag=%i, FINTERPflag=%i\n",
492
               v->level, v->frmrtq_postproc, v->bitrtq_postproc,
493
               v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
494
               v->tfcntrflag, v->finterpflag
495
               );
496

    
497
    v->psf = get_bits1(gb);
498
    if(v->psf) { //PsF, 6.1.13
499
        av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
500
        return -1;
501
    }
502
    v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
503
    if(get_bits1(gb)) { //Display Info - decoding is not affected by it
504
        int w, h, ar = 0;
505
        av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
506
        v->s.avctx->width  = w = get_bits(gb, 14) + 1;
507
        v->s.avctx->height = h = get_bits(gb, 14) + 1;
508
        av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
509
        if(get_bits1(gb))
510
            ar = get_bits(gb, 4);
511
        if(ar && ar < 14){
512
            v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
513
        }else if(ar == 15){
514
            w = get_bits(gb, 8);
515
            h = get_bits(gb, 8);
516
            v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
517
        }
518
        av_log(v->s.avctx, AV_LOG_DEBUG, "Aspect: %i:%i\n", v->s.avctx->sample_aspect_ratio.num, v->s.avctx->sample_aspect_ratio.den);
519

    
520
        if(get_bits1(gb)){ //framerate stuff
521
            if(get_bits1(gb)) {
522
                v->s.avctx->time_base.num = 32;
523
                v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
524
            } else {
525
                int nr, dr;
526
                nr = get_bits(gb, 8);
527
                dr = get_bits(gb, 4);
528
                if(nr && nr < 8 && dr && dr < 3){
529
                    v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
530
                    v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
531
                }
532
            }
533
        }
534

    
535
        if(get_bits1(gb)){
536
            v->color_prim = get_bits(gb, 8);
537
            v->transfer_char = get_bits(gb, 8);
538
            v->matrix_coef = get_bits(gb, 8);
539
        }
540
    }
541

    
542
    v->hrd_param_flag = get_bits1(gb);
543
    if(v->hrd_param_flag) {
544
        int i;
545
        v->hrd_num_leaky_buckets = get_bits(gb, 5);
546
        skip_bits(gb, 4); //bitrate exponent
547
        skip_bits(gb, 4); //buffer size exponent
548
        for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
549
            skip_bits(gb, 16); //hrd_rate[n]
550
            skip_bits(gb, 16); //hrd_buffer[n]
551
        }
552
    }
553
    return 0;
554
}
555

    
556
int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
557
{
558
    int i;
559

    
560
    av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
561
    v->broken_link = get_bits1(gb);
562
    v->closed_entry = get_bits1(gb);
563
    v->panscanflag = get_bits1(gb);
564
    v->refdist_flag = get_bits1(gb);
565
    v->s.loop_filter = get_bits1(gb);
566
    v->fastuvmc = get_bits1(gb);
567
    v->extended_mv = get_bits1(gb);
568
    v->dquant = get_bits(gb, 2);
569
    v->vstransform = get_bits1(gb);
570
    v->overlap = get_bits1(gb);
571
    v->quantizer_mode = get_bits(gb, 2);
572

    
573
    if(v->hrd_param_flag){
574
        for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
575
            skip_bits(gb, 8); //hrd_full[n]
576
        }
577
    }
578

    
579
    if(get_bits1(gb)){
580
        avctx->coded_width = (get_bits(gb, 12)+1)<<1;
581
        avctx->coded_height = (get_bits(gb, 12)+1)<<1;
582
    }
583
    if(v->extended_mv)
584
        v->extended_dmv = get_bits1(gb);
585
    if((v->range_mapy_flag = get_bits1(gb))) {
586
        av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
587
        v->range_mapy = get_bits(gb, 3);
588
    }
589
    if((v->range_mapuv_flag = get_bits1(gb))) {
590
        av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
591
        v->range_mapuv = get_bits(gb, 3);
592
    }
593

    
594
    av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
595
        "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
596
        "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
597
        "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
598
        v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
599
        v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
600

    
601
    return 0;
602
}
603

    
604
int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
605
{
606
    int pqindex, lowquant, status;
607

    
608
    if(v->finterpflag) v->interpfrm = get_bits1(gb);
609
    skip_bits(gb, 2); //framecnt unused
610
    v->rangeredfrm = 0;
611
    if (v->rangered) v->rangeredfrm = get_bits1(gb);
612
    v->s.pict_type = get_bits1(gb);
613
    if (v->s.avctx->max_b_frames) {
614
        if (!v->s.pict_type) {
615
            if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;
616
            else v->s.pict_type = FF_B_TYPE;
617
        } else v->s.pict_type = FF_P_TYPE;
618
    } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;
619

    
620
    v->bi_type = 0;
621
    if(v->s.pict_type == FF_B_TYPE) {
622
        v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
623
        v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
624
        if(v->bfraction == 0) {
625
            v->s.pict_type = FF_BI_TYPE;
626
        }
627
    }
628
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
629
        skip_bits(gb, 7); // skip buffer fullness
630

    
631
    if(v->parse_only)
632
        return 0;
633

    
634
    /* calculate RND */
635
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
636
        v->rnd = 1;
637
    if(v->s.pict_type == FF_P_TYPE)
638
        v->rnd ^= 1;
639

    
640
    /* Quantizer stuff */
641
    pqindex = get_bits(gb, 5);
642
    if(!pqindex) return -1;
643
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
644
        v->pq = ff_vc1_pquant_table[0][pqindex];
645
    else
646
        v->pq = ff_vc1_pquant_table[1][pqindex];
647

    
648
    v->pquantizer = 1;
649
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
650
        v->pquantizer = pqindex < 9;
651
    if (v->quantizer_mode == QUANT_NON_UNIFORM)
652
        v->pquantizer = 0;
653
    v->pqindex = pqindex;
654
    if (pqindex < 9) v->halfpq = get_bits1(gb);
655
    else v->halfpq = 0;
656
    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
657
        v->pquantizer = get_bits1(gb);
658
    v->dquantfrm = 0;
659
    if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);
660
    v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
661
    v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
662
    v->range_x = 1 << (v->k_x - 1);
663
    v->range_y = 1 << (v->k_y - 1);
664
    if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);
665

    
666
    if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){
667
        v->x8_type = get_bits1(gb);
668
    }else v->x8_type = 0;
669
//av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
670
//        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
671

    
672
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;
673

    
674
    switch(v->s.pict_type) {
675
    case FF_P_TYPE:
676
        if (v->pq < 5) v->tt_index = 0;
677
        else if(v->pq < 13) v->tt_index = 1;
678
        else v->tt_index = 2;
679

    
680
        lowquant = (v->pq > 12) ? 0 : 1;
681
        v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
682
        if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
683
        {
684
            int scale, shift, i;
685
            v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
686
            v->lumscale = get_bits(gb, 6);
687
            v->lumshift = get_bits(gb, 6);
688
            v->use_ic = 1;
689
            /* fill lookup tables for intensity compensation */
690
            if(!v->lumscale) {
691
                scale = -64;
692
                shift = (255 - v->lumshift * 2) << 6;
693
                if(v->lumshift > 31)
694
                    shift += 128 << 6;
695
            } else {
696
                scale = v->lumscale + 32;
697
                if(v->lumshift > 31)
698
                    shift = (v->lumshift - 64) << 6;
699
                else
700
                    shift = v->lumshift << 6;
701
            }
702
            for(i = 0; i < 256; i++) {
703
                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
704
                v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
705
            }
706
        }
707
        if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
708
            v->s.quarter_sample = 0;
709
        else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
710
            if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
711
                v->s.quarter_sample = 0;
712
            else
713
                v->s.quarter_sample = 1;
714
        } else
715
            v->s.quarter_sample = 1;
716
        v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
717

    
718
        if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
719
                 v->mv_mode2 == MV_PMODE_MIXED_MV)
720
                || v->mv_mode == MV_PMODE_MIXED_MV)
721
        {
722
            status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
723
            if (status < 0) return -1;
724
            av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
725
                   "Imode: %i, Invert: %i\n", status>>1, status&1);
726
        } else {
727
            v->mv_type_is_raw = 0;
728
            memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
729
        }
730
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
731
        if (status < 0) return -1;
732
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
733
               "Imode: %i, Invert: %i\n", status>>1, status&1);
734

    
735
        /* Hopefully this is correct for P frames */
736
        v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
737
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
738

    
739
        if (v->dquant)
740
        {
741
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
742
            vop_dquant_decoding(v);
743
        }
744

    
745
        v->ttfrm = 0; //FIXME Is that so ?
746
        if (v->vstransform)
747
        {
748
            v->ttmbf = get_bits1(gb);
749
            if (v->ttmbf)
750
            {
751
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
752
            }
753
        } else {
754
            v->ttmbf = 1;
755
            v->ttfrm = TT_8X8;
756
        }
757
        break;
758
    case FF_B_TYPE:
759
        if (v->pq < 5) v->tt_index = 0;
760
        else if(v->pq < 13) v->tt_index = 1;
761
        else v->tt_index = 2;
762

    
763
        v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
764
        v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
765
        v->s.mspel = v->s.quarter_sample;
766

    
767
        status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
768
        if (status < 0) return -1;
769
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
770
               "Imode: %i, Invert: %i\n", status>>1, status&1);
771
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
772
        if (status < 0) return -1;
773
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
774
               "Imode: %i, Invert: %i\n", status>>1, status&1);
775

    
776
        v->s.mv_table_index = get_bits(gb, 2);
777
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
778

    
779
        if (v->dquant)
780
        {
781
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
782
            vop_dquant_decoding(v);
783
        }
784

    
785
        v->ttfrm = 0;
786
        if (v->vstransform)
787
        {
788
            v->ttmbf = get_bits1(gb);
789
            if (v->ttmbf)
790
            {
791
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
792
            }
793
        } else {
794
            v->ttmbf = 1;
795
            v->ttfrm = TT_8X8;
796
        }
797
        break;
798
    }
799

    
800
    if(!v->x8_type)
801
    {
802
        /* AC Syntax */
803
        v->c_ac_table_index = decode012(gb);
804
        if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
805
        {
806
            v->y_ac_table_index = decode012(gb);
807
        }
808
        /* DC Syntax */
809
        v->s.dc_table_index = get_bits1(gb);
810
    }
811

    
812
    if(v->s.pict_type == FF_BI_TYPE) {
813
        v->s.pict_type = FF_B_TYPE;
814
        v->bi_type = 1;
815
    }
816
    return 0;
817
}
818

    
819
int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
820
{
821
    int pqindex, lowquant;
822
    int status;
823

    
824
    v->p_frame_skipped = 0;
825

    
826
    if(v->interlace){
827
        v->fcm = decode012(gb);
828
        if(v->fcm){
829
            if(!v->warn_interlaced++)
830
                av_log(v->s.avctx, AV_LOG_ERROR, "Interlaced frames/fields support is not implemented\n");
831
            return -1;
832
        }
833
    }
834
    switch(get_unary(gb, 0, 4)) {
835
    case 0:
836
        v->s.pict_type = FF_P_TYPE;
837
        break;
838
    case 1:
839
        v->s.pict_type = FF_B_TYPE;
840
        break;
841
    case 2:
842
        v->s.pict_type = FF_I_TYPE;
843
        break;
844
    case 3:
845
        v->s.pict_type = FF_BI_TYPE;
846
        break;
847
    case 4:
848
        v->s.pict_type = FF_P_TYPE; // skipped pic
849
        v->p_frame_skipped = 1;
850
        return 0;
851
    }
852
    if(v->tfcntrflag)
853
        skip_bits(gb, 8);
854
    if(v->broadcast) {
855
        if(!v->interlace || v->psf) {
856
            v->rptfrm = get_bits(gb, 2);
857
        } else {
858
            v->tff = get_bits1(gb);
859
            v->rptfrm = get_bits1(gb);
860
        }
861
    }
862
    if(v->panscanflag) {
863
        av_log_missing_feature(v->s.avctx, "Pan-scan", 0);
864
        //...
865
    }
866
    v->rnd = get_bits1(gb);
867
    if(v->interlace)
868
        v->uvsamp = get_bits1(gb);
869
    if(v->finterpflag) v->interpfrm = get_bits1(gb);
870
    if(v->s.pict_type == FF_B_TYPE) {
871
        v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
872
        v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
873
        if(v->bfraction == 0) {
874
            v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */
875
        }
876
    }
877
    pqindex = get_bits(gb, 5);
878
    if(!pqindex) return -1;
879
    v->pqindex = pqindex;
880
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
881
        v->pq = ff_vc1_pquant_table[0][pqindex];
882
    else
883
        v->pq = ff_vc1_pquant_table[1][pqindex];
884

    
885
    v->pquantizer = 1;
886
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
887
        v->pquantizer = pqindex < 9;
888
    if (v->quantizer_mode == QUANT_NON_UNIFORM)
889
        v->pquantizer = 0;
890
    v->pqindex = pqindex;
891
    if (pqindex < 9) v->halfpq = get_bits1(gb);
892
    else v->halfpq = 0;
893
    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
894
        v->pquantizer = get_bits1(gb);
895
    if(v->postprocflag)
896
        v->postproc = get_bits(gb, 2);
897

    
898
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;
899

    
900
    if(v->parse_only)
901
        return 0;
902

    
903
    switch(v->s.pict_type) {
904
    case FF_I_TYPE:
905
    case FF_BI_TYPE:
906
        status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
907
        if (status < 0) return -1;
908
        av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
909
                "Imode: %i, Invert: %i\n", status>>1, status&1);
910
        v->condover = CONDOVER_NONE;
911
        if(v->overlap && v->pq <= 8) {
912
            v->condover = decode012(gb);
913
            if(v->condover == CONDOVER_SELECT) {
914
                status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
915
                if (status < 0) return -1;
916
                av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
917
                        "Imode: %i, Invert: %i\n", status>>1, status&1);
918
            }
919
        }
920
        break;
921
    case FF_P_TYPE:
922
        if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
923
        else v->mvrange = 0;
924
        v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
925
        v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
926
        v->range_x = 1 << (v->k_x - 1);
927
        v->range_y = 1 << (v->k_y - 1);
928

    
929
        if (v->pq < 5) v->tt_index = 0;
930
        else if(v->pq < 13) v->tt_index = 1;
931
        else v->tt_index = 2;
932

    
933
        lowquant = (v->pq > 12) ? 0 : 1;
934
        v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
935
        if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
936
        {
937
            int scale, shift, i;
938
            v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
939
            v->lumscale = get_bits(gb, 6);
940
            v->lumshift = get_bits(gb, 6);
941
            /* fill lookup tables for intensity compensation */
942
            if(!v->lumscale) {
943
                scale = -64;
944
                shift = (255 - v->lumshift * 2) << 6;
945
                if(v->lumshift > 31)
946
                    shift += 128 << 6;
947
            } else {
948
                scale = v->lumscale + 32;
949
                if(v->lumshift > 31)
950
                    shift = (v->lumshift - 64) << 6;
951
                else
952
                    shift = v->lumshift << 6;
953
            }
954
            for(i = 0; i < 256; i++) {
955
                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
956
                v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
957
            }
958
            v->use_ic = 1;
959
        }
960
        if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
961
            v->s.quarter_sample = 0;
962
        else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
963
            if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
964
                v->s.quarter_sample = 0;
965
            else
966
                v->s.quarter_sample = 1;
967
        } else
968
            v->s.quarter_sample = 1;
969
        v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));
970

    
971
        if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
972
                 v->mv_mode2 == MV_PMODE_MIXED_MV)
973
                || v->mv_mode == MV_PMODE_MIXED_MV)
974
        {
975
            status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
976
            if (status < 0) return -1;
977
            av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
978
                   "Imode: %i, Invert: %i\n", status>>1, status&1);
979
        } else {
980
            v->mv_type_is_raw = 0;
981
            memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
982
        }
983
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
984
        if (status < 0) return -1;
985
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
986
               "Imode: %i, Invert: %i\n", status>>1, status&1);
987

    
988
        /* Hopefully this is correct for P frames */
989
        v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
990
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
991
        if (v->dquant)
992
        {
993
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
994
            vop_dquant_decoding(v);
995
        }
996

    
997
        v->ttfrm = 0; //FIXME Is that so ?
998
        if (v->vstransform)
999
        {
1000
            v->ttmbf = get_bits1(gb);
1001
            if (v->ttmbf)
1002
            {
1003
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1004
            }
1005
        } else {
1006
            v->ttmbf = 1;
1007
            v->ttfrm = TT_8X8;
1008
        }
1009
        break;
1010
    case FF_B_TYPE:
1011
        if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
1012
        else v->mvrange = 0;
1013
        v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
1014
        v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
1015
        v->range_x = 1 << (v->k_x - 1);
1016
        v->range_y = 1 << (v->k_y - 1);
1017

    
1018
        if (v->pq < 5) v->tt_index = 0;
1019
        else if(v->pq < 13) v->tt_index = 1;
1020
        else v->tt_index = 2;
1021

    
1022
        v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
1023
        v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
1024
        v->s.mspel = v->s.quarter_sample;
1025

    
1026
        status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
1027
        if (status < 0) return -1;
1028
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
1029
               "Imode: %i, Invert: %i\n", status>>1, status&1);
1030
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
1031
        if (status < 0) return -1;
1032
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
1033
               "Imode: %i, Invert: %i\n", status>>1, status&1);
1034

    
1035
        v->s.mv_table_index = get_bits(gb, 2);
1036
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
1037

    
1038
        if (v->dquant)
1039
        {
1040
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1041
            vop_dquant_decoding(v);
1042
        }
1043

    
1044
        v->ttfrm = 0;
1045
        if (v->vstransform)
1046
        {
1047
            v->ttmbf = get_bits1(gb);
1048
            if (v->ttmbf)
1049
            {
1050
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1051
            }
1052
        } else {
1053
            v->ttmbf = 1;
1054
            v->ttfrm = TT_8X8;
1055
        }
1056
        break;
1057
    }
1058

    
1059
    /* AC Syntax */
1060
    v->c_ac_table_index = decode012(gb);
1061
    if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
1062
    {
1063
        v->y_ac_table_index = decode012(gb);
1064
    }
1065
    /* DC Syntax */
1066
    v->s.dc_table_index = get_bits1(gb);
1067
    if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {
1068
        av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1069
        vop_dquant_decoding(v);
1070
    }
1071

    
1072
    v->bi_type = 0;
1073
    if(v->s.pict_type == FF_BI_TYPE) {
1074
        v->s.pict_type = FF_B_TYPE;
1075
        v->bi_type = 1;
1076
    }
1077
    return 0;
1078
}