Statistics
| Branch: | Revision:

ffmpeg / libavcodec / vc1.c @ 42ff9d7a

History | View | Annotate | Download (34.7 KB)

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
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22

    
23
/**
24
 * @file
25
 * VC-1 and WMV3 decoder common code
26
 *
27
 */
28
#include "internal.h"
29
#include "dsputil.h"
30
#include "avcodec.h"
31
#include "mpegvideo.h"
32
#include "vc1.h"
33
#include "vc1data.h"
34
#include "msmpeg4data.h"
35
#include "unary.h"
36
#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,
54
    IMODE_NORM2,
55
    IMODE_DIFF2,
56
    IMODE_NORM6,
57
    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
74
            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
94
            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
/**
284
 * Decode Simple/Main Profiles sequence header
285
 * @see Figure 7-8, p16-17
286
 * @param avctx Codec context
287
 * @param gb GetBit context initialized from Codec context extra_data
288
 * @return Status
289
 */
290
int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
291
{
292
    av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));
293
    v->profile = get_bits(gb, 2);
294
    if (v->profile == PROFILE_COMPLEX)
295
    {
296
        av_log(avctx, AV_LOG_ERROR, "WMV3 Complex Profile is not fully supported\n");
297
    }
298

    
299
    if (v->profile == PROFILE_ADVANCED)
300
    {
301
        v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz;
302
        v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz;
303
        return decode_sequence_header_adv(v, gb);
304
    }
305
    else
306
    {
307
        v->zz_8x4 = wmv2_scantableA;
308
        v->zz_4x8 = wmv2_scantableB;
309
        v->res_sm = get_bits(gb, 2); //reserved
310
        if (v->res_sm)
311
        {
312
            av_log(avctx, AV_LOG_ERROR,
313
                   "Reserved RES_SM=%i is forbidden\n", v->res_sm);
314
            return -1;
315
        }
316
    }
317

    
318
    // (fps-2)/4 (->30)
319
    v->frmrtq_postproc = get_bits(gb, 3); //common
320
    // (bitrate-32kbps)/64kbps
321
    v->bitrtq_postproc = get_bits(gb, 5); //common
322
    v->s.loop_filter = get_bits1(gb); //common
323
    if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
324
    {
325
        av_log(avctx, AV_LOG_ERROR,
326
               "LOOPFILTER shall not be enabled in Simple Profile\n");
327
    }
328
    if(v->s.avctx->skip_loop_filter >= AVDISCARD_ALL)
329
        v->s.loop_filter = 0;
330

    
331
    v->res_x8 = get_bits1(gb); //reserved
332
    v->multires = get_bits1(gb);
333
    v->res_fasttx = get_bits1(gb);
334
    if (!v->res_fasttx)
335
    {
336
        v->s.dsp.vc1_inv_trans_8x8 = ff_simple_idct;
337
        v->s.dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add;
338
        v->s.dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add;
339
        v->s.dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add;
340
        v->s.dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add;
341
        v->s.dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add;
342
        v->s.dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add;
343
        v->s.dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add;
344
    }
345

    
346
    v->fastuvmc =  get_bits1(gb); //common
347
    if (!v->profile && !v->fastuvmc)
348
    {
349
        av_log(avctx, AV_LOG_ERROR,
350
               "FASTUVMC unavailable in Simple Profile\n");
351
        return -1;
352
    }
353
    v->extended_mv =  get_bits1(gb); //common
354
    if (!v->profile && v->extended_mv)
355
    {
356
        av_log(avctx, AV_LOG_ERROR,
357
               "Extended MVs unavailable in Simple Profile\n");
358
        return -1;
359
    }
360
    v->dquant =  get_bits(gb, 2); //common
361
    v->vstransform =  get_bits1(gb); //common
362

    
363
    v->res_transtab = get_bits1(gb);
364
    if (v->res_transtab)
365
    {
366
        av_log(avctx, AV_LOG_ERROR,
367
               "1 for reserved RES_TRANSTAB is forbidden\n");
368
        return -1;
369
    }
370

    
371
    v->overlap = get_bits1(gb); //common
372

    
373
    v->s.resync_marker = get_bits1(gb);
374
    v->rangered = get_bits1(gb);
375
    if (v->rangered && v->profile == PROFILE_SIMPLE)
376
    {
377
        av_log(avctx, AV_LOG_INFO,
378
               "RANGERED should be set to 0 in Simple Profile\n");
379
    }
380

    
381
    v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
382
    v->quantizer_mode = get_bits(gb, 2); //common
383

    
384
    v->finterpflag = get_bits1(gb); //common
385
    v->res_rtm_flag = get_bits1(gb); //reserved
386
    if (!v->res_rtm_flag)
387
    {
388
//            av_log(avctx, AV_LOG_ERROR,
389
//                   "0 for reserved RES_RTM_FLAG is forbidden\n");
390
        av_log(avctx, AV_LOG_ERROR,
391
               "Old WMV3 version detected, some frames may be decoded incorrectly\n");
392
        //return -1;
393
    }
394
    //TODO: figure out what they mean (always 0x402F)
395
    if(!v->res_fasttx) skip_bits(gb, 16);
396
    av_log(avctx, AV_LOG_DEBUG,
397
               "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
398
               "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"
399
               "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
400
               "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
401
               v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
402
               v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
403
               v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
404
               v->dquant, v->quantizer_mode, avctx->max_b_frames
405
               );
406
    return 0;
407
}
408

    
409
static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
410
{
411
    v->res_rtm_flag = 1;
412
    v->level = get_bits(gb, 3);
413
    if(v->level >= 5)
414
    {
415
        av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
416
    }
417
    v->chromaformat = get_bits(gb, 2);
418
    if (v->chromaformat != 1)
419
    {
420
        av_log(v->s.avctx, AV_LOG_ERROR,
421
               "Only 4:2:0 chroma format supported\n");
422
        return -1;
423
    }
424

    
425
    // (fps-2)/4 (->30)
426
    v->frmrtq_postproc = get_bits(gb, 3); //common
427
    // (bitrate-32kbps)/64kbps
428
    v->bitrtq_postproc = get_bits(gb, 5); //common
429
    v->postprocflag = get_bits1(gb); //common
430

    
431
    v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;
432
    v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;
433
    v->s.avctx->width = v->s.avctx->coded_width;
434
    v->s.avctx->height = v->s.avctx->coded_height;
435
    v->broadcast = get_bits1(gb);
436
    v->interlace = get_bits1(gb);
437
    v->tfcntrflag = get_bits1(gb);
438
    v->finterpflag = get_bits1(gb);
439
    skip_bits1(gb); // reserved
440

    
441
    v->s.h_edge_pos = v->s.avctx->coded_width;
442
    v->s.v_edge_pos = v->s.avctx->coded_height;
443

    
444
    av_log(v->s.avctx, AV_LOG_DEBUG,
445
               "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
446
               "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"
447
               "TFCTRflag=%i, FINTERPflag=%i\n",
448
               v->level, v->frmrtq_postproc, v->bitrtq_postproc,
449
               v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,
450
               v->tfcntrflag, v->finterpflag
451
               );
452

    
453
    v->psf = get_bits1(gb);
454
    if(v->psf) { //PsF, 6.1.13
455
        av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");
456
        return -1;
457
    }
458
    v->s.max_b_frames = v->s.avctx->max_b_frames = 7;
459
    if(get_bits1(gb)) { //Display Info - decoding is not affected by it
460
        int w, h, ar = 0;
461
        av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");
462
        v->s.avctx->width  = w = get_bits(gb, 14) + 1;
463
        v->s.avctx->height = h = get_bits(gb, 14) + 1;
464
        av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);
465
        if(get_bits1(gb))
466
            ar = get_bits(gb, 4);
467
        if(ar && ar < 14){
468
            v->s.avctx->sample_aspect_ratio = ff_vc1_pixel_aspect[ar];
469
        }else if(ar == 15){
470
            w = get_bits(gb, 8);
471
            h = get_bits(gb, 8);
472
            v->s.avctx->sample_aspect_ratio = (AVRational){w, h};
473
        }
474
        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);
475

    
476
        if(get_bits1(gb)){ //framerate stuff
477
            if(get_bits1(gb)) {
478
                v->s.avctx->time_base.num = 32;
479
                v->s.avctx->time_base.den = get_bits(gb, 16) + 1;
480
            } else {
481
                int nr, dr;
482
                nr = get_bits(gb, 8);
483
                dr = get_bits(gb, 4);
484
                if(nr && nr < 8 && dr && dr < 3){
485
                    v->s.avctx->time_base.num = ff_vc1_fps_dr[dr - 1];
486
                    v->s.avctx->time_base.den = ff_vc1_fps_nr[nr - 1] * 1000;
487
                }
488
            }
489
        }
490

    
491
        if(get_bits1(gb)){
492
            v->color_prim = get_bits(gb, 8);
493
            v->transfer_char = get_bits(gb, 8);
494
            v->matrix_coef = get_bits(gb, 8);
495
        }
496
    }
497

    
498
    v->hrd_param_flag = get_bits1(gb);
499
    if(v->hrd_param_flag) {
500
        int i;
501
        v->hrd_num_leaky_buckets = get_bits(gb, 5);
502
        skip_bits(gb, 4); //bitrate exponent
503
        skip_bits(gb, 4); //buffer size exponent
504
        for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
505
            skip_bits(gb, 16); //hrd_rate[n]
506
            skip_bits(gb, 16); //hrd_buffer[n]
507
        }
508
    }
509
    return 0;
510
}
511

    
512
int vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb)
513
{
514
    int i;
515

    
516
    av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
517
    v->broken_link = get_bits1(gb);
518
    v->closed_entry = get_bits1(gb);
519
    v->panscanflag = get_bits1(gb);
520
    v->refdist_flag = get_bits1(gb);
521
    v->s.loop_filter = get_bits1(gb);
522
    v->fastuvmc = get_bits1(gb);
523
    v->extended_mv = get_bits1(gb);
524
    v->dquant = get_bits(gb, 2);
525
    v->vstransform = get_bits1(gb);
526
    v->overlap = get_bits1(gb);
527
    v->quantizer_mode = get_bits(gb, 2);
528

    
529
    if(v->hrd_param_flag){
530
        for(i = 0; i < v->hrd_num_leaky_buckets; i++) {
531
            skip_bits(gb, 8); //hrd_full[n]
532
        }
533
    }
534

    
535
    if(get_bits1(gb)){
536
        avctx->coded_width = (get_bits(gb, 12)+1)<<1;
537
        avctx->coded_height = (get_bits(gb, 12)+1)<<1;
538
    }
539
    if(v->extended_mv)
540
        v->extended_dmv = get_bits1(gb);
541
    if((v->range_mapy_flag = get_bits1(gb))) {
542
        av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");
543
        v->range_mapy = get_bits(gb, 3);
544
    }
545
    if((v->range_mapuv_flag = get_bits1(gb))) {
546
        av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");
547
        v->range_mapuv = get_bits(gb, 3);
548
    }
549

    
550
    av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"
551
        "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
552
        "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
553
        "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
554
        v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
555
        v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
556

    
557
    return 0;
558
}
559

    
560
int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
561
{
562
    int pqindex, lowquant, status;
563

    
564
    if(v->finterpflag) v->interpfrm = get_bits1(gb);
565
    skip_bits(gb, 2); //framecnt unused
566
    v->rangeredfrm = 0;
567
    if (v->rangered) v->rangeredfrm = get_bits1(gb);
568
    v->s.pict_type = get_bits1(gb);
569
    if (v->s.avctx->max_b_frames) {
570
        if (!v->s.pict_type) {
571
            if (get_bits1(gb)) v->s.pict_type = FF_I_TYPE;
572
            else v->s.pict_type = FF_B_TYPE;
573
        } else v->s.pict_type = FF_P_TYPE;
574
    } else v->s.pict_type = v->s.pict_type ? FF_P_TYPE : FF_I_TYPE;
575

    
576
    v->bi_type = 0;
577
    if(v->s.pict_type == FF_B_TYPE) {
578
        v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
579
        v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
580
        if(v->bfraction == 0) {
581
            v->s.pict_type = FF_BI_TYPE;
582
        }
583
    }
584
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
585
        skip_bits(gb, 7); // skip buffer fullness
586

    
587
    if(v->parse_only)
588
        return 0;
589

    
590
    /* calculate RND */
591
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
592
        v->rnd = 1;
593
    if(v->s.pict_type == FF_P_TYPE)
594
        v->rnd ^= 1;
595

    
596
    /* Quantizer stuff */
597
    pqindex = get_bits(gb, 5);
598
    if(!pqindex) return -1;
599
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
600
        v->pq = ff_vc1_pquant_table[0][pqindex];
601
    else
602
        v->pq = ff_vc1_pquant_table[1][pqindex];
603

    
604
    v->pquantizer = 1;
605
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
606
        v->pquantizer = pqindex < 9;
607
    if (v->quantizer_mode == QUANT_NON_UNIFORM)
608
        v->pquantizer = 0;
609
    v->pqindex = pqindex;
610
    if (pqindex < 9) v->halfpq = get_bits1(gb);
611
    else v->halfpq = 0;
612
    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
613
        v->pquantizer = get_bits1(gb);
614
    v->dquantfrm = 0;
615
    if (v->extended_mv == 1) v->mvrange = get_unary(gb, 0, 3);
616
    v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
617
    v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
618
    v->range_x = 1 << (v->k_x - 1);
619
    v->range_y = 1 << (v->k_y - 1);
620
    if (v->multires && v->s.pict_type != FF_B_TYPE) v->respic = get_bits(gb, 2);
621

    
622
    if(v->res_x8 && (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)){
623
        v->x8_type = get_bits1(gb);
624
    }else v->x8_type = 0;
625
//av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
626
//        (v->s.pict_type == FF_P_TYPE) ? 'P' : ((v->s.pict_type == FF_I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
627

    
628
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;
629

    
630
    switch(v->s.pict_type) {
631
    case FF_P_TYPE:
632
        if (v->pq < 5) v->tt_index = 0;
633
        else if(v->pq < 13) v->tt_index = 1;
634
        else v->tt_index = 2;
635

    
636
        lowquant = (v->pq > 12) ? 0 : 1;
637
        v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
638
        if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
639
        {
640
            int scale, shift, i;
641
            v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
642
            v->lumscale = get_bits(gb, 6);
643
            v->lumshift = get_bits(gb, 6);
644
            v->use_ic = 1;
645
            /* fill lookup tables for intensity compensation */
646
            if(!v->lumscale) {
647
                scale = -64;
648
                shift = (255 - v->lumshift * 2) << 6;
649
                if(v->lumshift > 31)
650
                    shift += 128 << 6;
651
            } else {
652
                scale = v->lumscale + 32;
653
                if(v->lumshift > 31)
654
                    shift = (v->lumshift - 64) << 6;
655
                else
656
                    shift = v->lumshift << 6;
657
            }
658
            for(i = 0; i < 256; i++) {
659
                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
660
                v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
661
            }
662
        }
663
        if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
664
            v->s.quarter_sample = 0;
665
        else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
666
            if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
667
                v->s.quarter_sample = 0;
668
            else
669
                v->s.quarter_sample = 1;
670
        } else
671
            v->s.quarter_sample = 1;
672
        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));
673

    
674
        if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
675
                 v->mv_mode2 == MV_PMODE_MIXED_MV)
676
                || v->mv_mode == MV_PMODE_MIXED_MV)
677
        {
678
            status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
679
            if (status < 0) return -1;
680
            av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
681
                   "Imode: %i, Invert: %i\n", status>>1, status&1);
682
        } else {
683
            v->mv_type_is_raw = 0;
684
            memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
685
        }
686
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
687
        if (status < 0) return -1;
688
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
689
               "Imode: %i, Invert: %i\n", status>>1, status&1);
690

    
691
        /* Hopefully this is correct for P frames */
692
        v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
693
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
694

    
695
        if (v->dquant)
696
        {
697
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
698
            vop_dquant_decoding(v);
699
        }
700

    
701
        v->ttfrm = 0; //FIXME Is that so ?
702
        if (v->vstransform)
703
        {
704
            v->ttmbf = get_bits1(gb);
705
            if (v->ttmbf)
706
            {
707
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
708
            }
709
        } else {
710
            v->ttmbf = 1;
711
            v->ttfrm = TT_8X8;
712
        }
713
        break;
714
    case FF_B_TYPE:
715
        if (v->pq < 5) v->tt_index = 0;
716
        else if(v->pq < 13) v->tt_index = 1;
717
        else v->tt_index = 2;
718

    
719
        v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
720
        v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
721
        v->s.mspel = v->s.quarter_sample;
722

    
723
        status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
724
        if (status < 0) return -1;
725
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
726
               "Imode: %i, Invert: %i\n", status>>1, status&1);
727
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
728
        if (status < 0) return -1;
729
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
730
               "Imode: %i, Invert: %i\n", status>>1, status&1);
731

    
732
        v->s.mv_table_index = get_bits(gb, 2);
733
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
734

    
735
        if (v->dquant)
736
        {
737
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
738
            vop_dquant_decoding(v);
739
        }
740

    
741
        v->ttfrm = 0;
742
        if (v->vstransform)
743
        {
744
            v->ttmbf = get_bits1(gb);
745
            if (v->ttmbf)
746
            {
747
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
748
            }
749
        } else {
750
            v->ttmbf = 1;
751
            v->ttfrm = TT_8X8;
752
        }
753
        break;
754
    }
755

    
756
    if(!v->x8_type)
757
    {
758
        /* AC Syntax */
759
        v->c_ac_table_index = decode012(gb);
760
        if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
761
        {
762
            v->y_ac_table_index = decode012(gb);
763
        }
764
        /* DC Syntax */
765
        v->s.dc_table_index = get_bits1(gb);
766
    }
767

    
768
    if(v->s.pict_type == FF_BI_TYPE) {
769
        v->s.pict_type = FF_B_TYPE;
770
        v->bi_type = 1;
771
    }
772
    return 0;
773
}
774

    
775
int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
776
{
777
    int pqindex, lowquant;
778
    int status;
779

    
780
    v->p_frame_skipped = 0;
781

    
782
    if(v->interlace){
783
        v->fcm = decode012(gb);
784
        if(v->fcm){
785
            if(!v->warn_interlaced++)
786
                av_log(v->s.avctx, AV_LOG_ERROR, "Interlaced frames/fields support is not implemented\n");
787
            return -1;
788
        }
789
    }
790
    switch(get_unary(gb, 0, 4)) {
791
    case 0:
792
        v->s.pict_type = FF_P_TYPE;
793
        break;
794
    case 1:
795
        v->s.pict_type = FF_B_TYPE;
796
        break;
797
    case 2:
798
        v->s.pict_type = FF_I_TYPE;
799
        break;
800
    case 3:
801
        v->s.pict_type = FF_BI_TYPE;
802
        break;
803
    case 4:
804
        v->s.pict_type = FF_P_TYPE; // skipped pic
805
        v->p_frame_skipped = 1;
806
        return 0;
807
    }
808
    if(v->tfcntrflag)
809
        skip_bits(gb, 8);
810
    if(v->broadcast) {
811
        if(!v->interlace || v->psf) {
812
            v->rptfrm = get_bits(gb, 2);
813
        } else {
814
            v->tff = get_bits1(gb);
815
            v->rptfrm = get_bits1(gb);
816
        }
817
    }
818
    if(v->panscanflag) {
819
        //...
820
    }
821
    v->rnd = get_bits1(gb);
822
    if(v->interlace)
823
        v->uvsamp = get_bits1(gb);
824
    if(v->finterpflag) v->interpfrm = get_bits1(gb);
825
    if(v->s.pict_type == FF_B_TYPE) {
826
        v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
827
        v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
828
        if(v->bfraction == 0) {
829
            v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */
830
        }
831
    }
832
    pqindex = get_bits(gb, 5);
833
    if(!pqindex) return -1;
834
    v->pqindex = pqindex;
835
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
836
        v->pq = ff_vc1_pquant_table[0][pqindex];
837
    else
838
        v->pq = ff_vc1_pquant_table[1][pqindex];
839

    
840
    v->pquantizer = 1;
841
    if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
842
        v->pquantizer = pqindex < 9;
843
    if (v->quantizer_mode == QUANT_NON_UNIFORM)
844
        v->pquantizer = 0;
845
    v->pqindex = pqindex;
846
    if (pqindex < 9) v->halfpq = get_bits1(gb);
847
    else v->halfpq = 0;
848
    if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
849
        v->pquantizer = get_bits1(gb);
850
    if(v->postprocflag)
851
        v->postproc = get_bits(gb, 2);
852

    
853
    if(v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_P_TYPE) v->use_ic = 0;
854

    
855
    if(v->parse_only)
856
        return 0;
857

    
858
    switch(v->s.pict_type) {
859
    case FF_I_TYPE:
860
    case FF_BI_TYPE:
861
        status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);
862
        if (status < 0) return -1;
863
        av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "
864
                "Imode: %i, Invert: %i\n", status>>1, status&1);
865
        v->condover = CONDOVER_NONE;
866
        if(v->overlap && v->pq <= 8) {
867
            v->condover = decode012(gb);
868
            if(v->condover == CONDOVER_SELECT) {
869
                status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);
870
                if (status < 0) return -1;
871
                av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "
872
                        "Imode: %i, Invert: %i\n", status>>1, status&1);
873
            }
874
        }
875
        break;
876
    case FF_P_TYPE:
877
        if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
878
        else v->mvrange = 0;
879
        v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
880
        v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
881
        v->range_x = 1 << (v->k_x - 1);
882
        v->range_y = 1 << (v->k_y - 1);
883

    
884
        if (v->pq < 5) v->tt_index = 0;
885
        else if(v->pq < 13) v->tt_index = 1;
886
        else v->tt_index = 2;
887

    
888
        lowquant = (v->pq > 12) ? 0 : 1;
889
        v->mv_mode = ff_vc1_mv_pmode_table[lowquant][get_unary(gb, 1, 4)];
890
        if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
891
        {
892
            int scale, shift, i;
893
            v->mv_mode2 = ff_vc1_mv_pmode_table2[lowquant][get_unary(gb, 1, 3)];
894
            v->lumscale = get_bits(gb, 6);
895
            v->lumshift = get_bits(gb, 6);
896
            /* fill lookup tables for intensity compensation */
897
            if(!v->lumscale) {
898
                scale = -64;
899
                shift = (255 - v->lumshift * 2) << 6;
900
                if(v->lumshift > 31)
901
                    shift += 128 << 6;
902
            } else {
903
                scale = v->lumscale + 32;
904
                if(v->lumshift > 31)
905
                    shift = (v->lumshift - 64) << 6;
906
                else
907
                    shift = v->lumshift << 6;
908
            }
909
            for(i = 0; i < 256; i++) {
910
                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
911
                v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
912
            }
913
            v->use_ic = 1;
914
        }
915
        if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
916
            v->s.quarter_sample = 0;
917
        else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {
918
            if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)
919
                v->s.quarter_sample = 0;
920
            else
921
                v->s.quarter_sample = 1;
922
        } else
923
            v->s.quarter_sample = 1;
924
        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));
925

    
926
        if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
927
                 v->mv_mode2 == MV_PMODE_MIXED_MV)
928
                || v->mv_mode == MV_PMODE_MIXED_MV)
929
        {
930
            status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
931
            if (status < 0) return -1;
932
            av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
933
                   "Imode: %i, Invert: %i\n", status>>1, status&1);
934
        } else {
935
            v->mv_type_is_raw = 0;
936
            memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
937
        }
938
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
939
        if (status < 0) return -1;
940
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
941
               "Imode: %i, Invert: %i\n", status>>1, status&1);
942

    
943
        /* Hopefully this is correct for P frames */
944
        v->s.mv_table_index = get_bits(gb, 2); //but using ff_vc1_ tables
945
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
946
        if (v->dquant)
947
        {
948
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
949
            vop_dquant_decoding(v);
950
        }
951

    
952
        v->ttfrm = 0; //FIXME Is that so ?
953
        if (v->vstransform)
954
        {
955
            v->ttmbf = get_bits1(gb);
956
            if (v->ttmbf)
957
            {
958
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
959
            }
960
        } else {
961
            v->ttmbf = 1;
962
            v->ttfrm = TT_8X8;
963
        }
964
        break;
965
    case FF_B_TYPE:
966
        if (v->extended_mv) v->mvrange = get_unary(gb, 0, 3);
967
        else v->mvrange = 0;
968
        v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
969
        v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
970
        v->range_x = 1 << (v->k_x - 1);
971
        v->range_y = 1 << (v->k_y - 1);
972

    
973
        if (v->pq < 5) v->tt_index = 0;
974
        else if(v->pq < 13) v->tt_index = 1;
975
        else v->tt_index = 2;
976

    
977
        v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
978
        v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
979
        v->s.mspel = v->s.quarter_sample;
980

    
981
        status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
982
        if (status < 0) return -1;
983
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
984
               "Imode: %i, Invert: %i\n", status>>1, status&1);
985
        status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
986
        if (status < 0) return -1;
987
        av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
988
               "Imode: %i, Invert: %i\n", status>>1, status&1);
989

    
990
        v->s.mv_table_index = get_bits(gb, 2);
991
        v->cbpcy_vlc = &ff_vc1_cbpcy_p_vlc[get_bits(gb, 2)];
992

    
993
        if (v->dquant)
994
        {
995
            av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
996
            vop_dquant_decoding(v);
997
        }
998

    
999
        v->ttfrm = 0;
1000
        if (v->vstransform)
1001
        {
1002
            v->ttmbf = get_bits1(gb);
1003
            if (v->ttmbf)
1004
            {
1005
                v->ttfrm = ff_vc1_ttfrm_to_tt[get_bits(gb, 2)];
1006
            }
1007
        } else {
1008
            v->ttmbf = 1;
1009
            v->ttfrm = TT_8X8;
1010
        }
1011
        break;
1012
    }
1013

    
1014
    /* AC Syntax */
1015
    v->c_ac_table_index = decode012(gb);
1016
    if (v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE)
1017
    {
1018
        v->y_ac_table_index = decode012(gb);
1019
    }
1020
    /* DC Syntax */
1021
    v->s.dc_table_index = get_bits1(gb);
1022
    if ((v->s.pict_type == FF_I_TYPE || v->s.pict_type == FF_BI_TYPE) && v->dquant) {
1023
        av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
1024
        vop_dquant_decoding(v);
1025
    }
1026

    
1027
    v->bi_type = 0;
1028
    if(v->s.pict_type == FF_BI_TYPE) {
1029
        v->s.pict_type = FF_B_TYPE;
1030
        v->bi_type = 1;
1031
    }
1032
    return 0;
1033
}