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1
/*
2
 * Copyright (c) 2002 The FFmpeg Project.
3
 *
4
 * This library is free software; you can redistribute it and/or
5
 * modify it under the terms of the GNU Lesser General Public
6
 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library 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
12
 * Lesser General Public License for more details.
13
 *
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 * You should have received a copy of the GNU Lesser General Public
15
 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
18
 */
19

    
20
/**
21
 * @file wmv2.c
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 * wmv2 codec.
23
 */
24
 
25
#include "simple_idct.h"
26
 
27
#define SKIP_TYPE_NONE 0
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#define SKIP_TYPE_MPEG 1
29
#define SKIP_TYPE_ROW  2
30
#define SKIP_TYPE_COL  3
31

    
32

    
33
typedef struct Wmv2Context{
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    MpegEncContext s;
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    int j_type_bit;
36
    int j_type;
37
    int flag3;
38
    int flag63;
39
    int abt_flag;
40
    int abt_type;
41
    int abt_type_table[6];
42
    int per_mb_abt;
43
    int per_block_abt;
44
    int mspel_bit;
45
    int cbp_table_index;
46
    int top_left_mv_flag;
47
    int per_mb_rl_bit;
48
    int skip_type;
49
    int hshift;
50
    
51
    ScanTable abt_scantable[2];
52
    DCTELEM abt_block2[6][64] __align8;
53
}Wmv2Context;
54

    
55
static void wmv2_common_init(Wmv2Context * w){
56
    MpegEncContext * const s= &w->s;
57
        
58
    ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA);
59
    ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB);
60
}
61

    
62
#ifdef CONFIG_ENCODERS
63

    
64
static int encode_ext_header(Wmv2Context *w){
65
    MpegEncContext * const s= &w->s;
66
    PutBitContext pb;
67
    int code;
68
        
69
    init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
70

    
71
    put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); //yes 29.97 -> 29
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    put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
73
    
74
    put_bits(&pb, 1, w->mspel_bit=1);
75
    put_bits(&pb, 1, w->flag3=1);
76
    put_bits(&pb, 1, w->abt_flag=1);
77
    put_bits(&pb, 1, w->j_type_bit=1);
78
    put_bits(&pb, 1, w->top_left_mv_flag=0);
79
    put_bits(&pb, 1, w->per_mb_rl_bit=1);
80
    put_bits(&pb, 3, code=1);
81
    
82
    flush_put_bits(&pb);
83

    
84
    s->slice_height = s->mb_height / code;
85
    
86
    return 0;
87
}
88

    
89
static int wmv2_encode_init(AVCodecContext *avctx){
90
    Wmv2Context * const w= avctx->priv_data;
91
    
92
    if(MPV_encode_init(avctx) < 0)
93
        return -1;
94
    
95
    wmv2_common_init(w);
96

    
97
    avctx->extradata_size= 4;
98
    avctx->extradata= av_mallocz(avctx->extradata_size + 10);
99
    encode_ext_header(w);
100
    
101
    return 0;
102
}
103

    
104
#if 0 /* unused, remove? */
105
static int wmv2_encode_end(AVCodecContext *avctx){
106
    
107
    if(MPV_encode_end(avctx) < 0)
108
        return -1;
109
    
110
    avctx->extradata_size= 0;
111
    av_freep(&avctx->extradata);
112
    
113
    return 0;
114
}
115
#endif
116

    
117
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
118
{
119
    Wmv2Context * const w= (Wmv2Context*)s;
120

    
121
    put_bits(&s->pb, 1, s->pict_type - 1);
122
    if(s->pict_type == I_TYPE){
123
        put_bits(&s->pb, 7, 0);
124
    }
125
    put_bits(&s->pb, 5, s->qscale);
126

    
127
    s->dc_table_index = 1;
128
    s->mv_table_index = 1; /* only if P frame */
129
//    s->use_skip_mb_code = 1; /* only if P frame */
130
    s->per_mb_rl_table = 0;
131
    s->mspel= 0;
132
    w->per_mb_abt=0;
133
    w->abt_type=0;
134
    w->j_type=0;
135

    
136
    assert(s->flipflop_rounding);
137

    
138
    if (s->pict_type == I_TYPE) {
139
        assert(s->no_rounding==1);
140
        if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
141
        
142
        if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
143
        
144
        if(!s->per_mb_rl_table){
145
            code012(&s->pb, s->rl_chroma_table_index);
146
            code012(&s->pb, s->rl_table_index);
147
        }
148

    
149
        put_bits(&s->pb, 1, s->dc_table_index);
150

    
151
        s->inter_intra_pred= 0;
152
    }else{
153
        int cbp_index;
154

    
155
        put_bits(&s->pb, 2, SKIP_TYPE_NONE);
156
        
157
        code012(&s->pb, cbp_index=0);
158
        if(s->qscale <= 10){
159
            int map[3]= {0,2,1};
160
            w->cbp_table_index= map[cbp_index];
161
        }else if(s->qscale <= 20){
162
            int map[3]= {1,0,2};
163
            w->cbp_table_index= map[cbp_index];
164
        }else{
165
            int map[3]= {2,1,0};
166
            w->cbp_table_index= map[cbp_index];
167
        }
168

    
169
        if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
170
    
171
        if(w->abt_flag){
172
            put_bits(&s->pb, 1, w->per_mb_abt^1);
173
            if(!w->per_mb_abt){
174
                code012(&s->pb, w->abt_type);
175
            }
176
        }
177

    
178
        if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
179
        
180
        if(!s->per_mb_rl_table){
181
            code012(&s->pb, s->rl_table_index);
182
            s->rl_chroma_table_index = s->rl_table_index;
183
        }
184
        put_bits(&s->pb, 1, s->dc_table_index);
185
        put_bits(&s->pb, 1, s->mv_table_index);
186
    
187
        s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
188
    }
189
    s->esc3_level_length= 0;
190
    s->esc3_run_length= 0;
191

    
192
    return 0;
193
}
194

    
195
// nearly idential to wmv1 but thats just because we dont use the useless M$ crap features
196
// its duplicated here in case someone wants to add support for these carp features
197
void ff_wmv2_encode_mb(MpegEncContext * s, 
198
                       DCTELEM block[6][64],
199
                       int motion_x, int motion_y)
200
{
201
    Wmv2Context * const w= (Wmv2Context*)s;
202
    int cbp, coded_cbp, i;
203
    int pred_x, pred_y;
204
    uint8_t *coded_block;
205

    
206
    handle_slices(s);
207
    
208
    if (!s->mb_intra) {
209
        /* compute cbp */
210
        set_stat(ST_INTER_MB);
211
        cbp = 0;
212
        for (i = 0; i < 6; i++) {
213
            if (s->block_last_index[i] >= 0)
214
                cbp |= 1 << (5 - i);
215
        }
216
        
217
        put_bits(&s->pb, 
218
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][1], 
219
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
220

    
221
        /* motion vector */
222
        h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
223
        msmpeg4_encode_motion(s, motion_x - pred_x, 
224
                              motion_y - pred_y);
225
    } else {
226
        /* compute cbp */
227
        cbp = 0;
228
        coded_cbp = 0;
229
        for (i = 0; i < 6; i++) {
230
            int val, pred;
231
            val = (s->block_last_index[i] >= 1);
232
            cbp |= val << (5 - i);
233
            if (i < 4) {
234
                /* predict value for close blocks only for luma */
235
                pred = coded_block_pred(s, i, &coded_block);
236
                *coded_block = val;
237
                val = val ^ pred;
238
            }
239
            coded_cbp |= val << (5 - i);
240
        }
241
#if 0
242
        if (coded_cbp)
243
            printf("cbp=%x %x\n", cbp, coded_cbp);
244
#endif
245

    
246
        if (s->pict_type == I_TYPE) {
247
            set_stat(ST_INTRA_MB);
248
            put_bits(&s->pb, 
249
                     ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
250
        } else {
251
            put_bits(&s->pb, 
252
                     wmv2_inter_table[w->cbp_table_index][cbp][1], 
253
                     wmv2_inter_table[w->cbp_table_index][cbp][0]);
254
        }
255
        set_stat(ST_INTRA_MB);
256
        put_bits(&s->pb, 1, 0);        /* no AC prediction yet */
257
        if(s->inter_intra_pred){
258
            s->h263_aic_dir=0;
259
            put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
260
        }
261
    }
262

    
263
    for (i = 0; i < 6; i++) {
264
        msmpeg4_encode_block(s, block[i], i);
265
    }
266
}
267
#endif //CONFIG_ENCODERS
268

    
269
static void parse_mb_skip(Wmv2Context * w){
270
    int mb_x, mb_y;
271
    MpegEncContext * const s= &w->s;
272
    uint32_t * const mb_type= s->current_picture_ptr->mb_type;
273

    
274
    w->skip_type= get_bits(&s->gb, 2);
275
    switch(w->skip_type){
276
    case SKIP_TYPE_NONE:
277
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
278
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
279
                mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
280
            }
281
        }
282
        break;
283
    case SKIP_TYPE_MPEG:
284
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
285
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
286
                mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
287
            }
288
        }
289
        break;
290
    case SKIP_TYPE_ROW:
291
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
292
            if(get_bits1(&s->gb)){
293
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
294
                    mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
295
                }
296
            }else{
297
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
298
                    mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
299
                }
300
            }
301
        }
302
        break;
303
    case SKIP_TYPE_COL:
304
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
305
            if(get_bits1(&s->gb)){
306
                for(mb_y=0; mb_y<s->mb_height; mb_y++){
307
                    mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
308
                }
309
            }else{
310
                for(mb_y=0; mb_y<s->mb_height; mb_y++){
311
                    mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
312
                }
313
            }
314
        }
315
        break;
316
    }
317
}
318

    
319
static int decode_ext_header(Wmv2Context *w){
320
    MpegEncContext * const s= &w->s;
321
    GetBitContext gb;
322
    int fps;
323
    int code;
324

    
325
    if(s->avctx->extradata_size<4) return -1;
326
    
327
    init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
328

    
329
    fps                = get_bits(&gb, 5);
330
    s->bit_rate        = get_bits(&gb, 11)*1024;
331
    w->mspel_bit       = get_bits1(&gb);
332
    w->flag3           = get_bits1(&gb);
333
    w->abt_flag        = get_bits1(&gb);
334
    w->j_type_bit      = get_bits1(&gb);
335
    w->top_left_mv_flag= get_bits1(&gb);
336
    w->per_mb_rl_bit   = get_bits1(&gb);
337
    code               = get_bits(&gb, 3);
338
    
339
    if(code==0) return -1;
340

    
341
    s->slice_height = s->mb_height / code;
342

    
343
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
344
        av_log(s->avctx, AV_LOG_DEBUG, "fps:%d, br:%d, qpbit:%d, abt_flag:%d, j_type_bit:%d, tl_mv_flag:%d, mbrl_bit:%d, code:%d, flag3:%d, slices:%d\n", 
345
        fps, s->bit_rate, w->mspel_bit, w->abt_flag, w->j_type_bit, w->top_left_mv_flag, w->per_mb_rl_bit, code, w->flag3, 
346
        code);
347
    }
348
    return 0;
349
}
350

    
351
int ff_wmv2_decode_picture_header(MpegEncContext * s)
352
{
353
    Wmv2Context * const w= (Wmv2Context*)s;
354
    int code;
355

    
356
#if 0
357
{
358
int i;
359
for(i=0; i<s->gb.size*8; i++)
360
    printf("%d", get_bits1(&s->gb));
361
//    get_bits1(&s->gb);
362
printf("END\n");
363
return -1;
364
}
365
#endif
366
    if(s->picture_number==0)
367
        decode_ext_header(w);
368

    
369
    s->pict_type = get_bits(&s->gb, 1) + 1;
370
    if(s->pict_type == I_TYPE){
371
        code = get_bits(&s->gb, 7);
372
        av_log(s->avctx, AV_LOG_ERROR, "I7:%X/\n", code);
373
    }
374
    s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
375
    if(s->qscale < 0)
376
       return -1;
377
       
378
    return 0;
379
}
380

    
381
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
382
{
383
    Wmv2Context * const w= (Wmv2Context*)s;
384

    
385
    if (s->pict_type == I_TYPE) {
386
        if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
387
        else              w->j_type= 0; //FIXME check
388
        
389
        if(!w->j_type){
390
            if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
391
            else                 s->per_mb_rl_table= 0;
392
        
393
            if(!s->per_mb_rl_table){
394
                s->rl_chroma_table_index = decode012(&s->gb);
395
                s->rl_table_index = decode012(&s->gb);
396
            }
397

    
398
            s->dc_table_index = get_bits1(&s->gb);
399
        }
400
        s->inter_intra_pred= 0;
401
        s->no_rounding = 1;
402
        if(s->avctx->debug&FF_DEBUG_PICT_INFO){
403
            av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n", 
404
                s->qscale,
405
                s->rl_chroma_table_index,
406
                s->rl_table_index, 
407
                s->dc_table_index,
408
                s->per_mb_rl_table,
409
                w->j_type);
410
        }
411
    }else{
412
        int cbp_index;
413
        w->j_type=0;
414

    
415
        parse_mb_skip(w);
416
        cbp_index= decode012(&s->gb);
417
        if(s->qscale <= 10){
418
            int map[3]= {0,2,1};
419
            w->cbp_table_index= map[cbp_index];
420
        }else if(s->qscale <= 20){
421
            int map[3]= {1,0,2};
422
            w->cbp_table_index= map[cbp_index];
423
        }else{
424
            int map[3]= {2,1,0};
425
            w->cbp_table_index= map[cbp_index];
426
        }
427

    
428
        if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
429
        else             s->mspel= 0; //FIXME check
430
    
431
        if(w->abt_flag){
432
            w->per_mb_abt= get_bits1(&s->gb)^1;
433
            if(!w->per_mb_abt){
434
                w->abt_type= decode012(&s->gb);
435
            }
436
        }
437

    
438
        if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
439
        else                 s->per_mb_rl_table= 0;
440
        
441
        if(!s->per_mb_rl_table){
442
            s->rl_table_index = decode012(&s->gb);
443
            s->rl_chroma_table_index = s->rl_table_index;
444
        }
445

    
446
        s->dc_table_index = get_bits1(&s->gb);
447
        s->mv_table_index = get_bits1(&s->gb);
448
    
449
        s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
450
        s->no_rounding ^= 1;
451
        
452
        if(s->avctx->debug&FF_DEBUG_PICT_INFO){
453
            av_log(s->avctx, AV_LOG_DEBUG, "rl:%d rlc:%d dc:%d mv:%d mbrl:%d qp:%d mspel:%d per_mb_abt:%d abt_type:%d cbp:%d ii:%d\n", 
454
                s->rl_table_index, 
455
                s->rl_chroma_table_index, 
456
                s->dc_table_index,
457
                s->mv_table_index,
458
                s->per_mb_rl_table,
459
                s->qscale,
460
                s->mspel,
461
                w->per_mb_abt,
462
                w->abt_type,
463
                w->cbp_table_index,
464
                s->inter_intra_pred);
465
        }
466
    }
467
    s->esc3_level_length= 0;
468
    s->esc3_run_length= 0;
469
    
470
s->picture_number++; //FIXME ?
471

    
472

    
473
//    if(w->j_type)
474
//        return wmv2_decode_j_picture(w); //FIXME
475

    
476
    if(w->j_type){
477
        av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
478
        return -1;
479
    }
480

    
481
    return 0;
482
}
483

    
484
static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
485
    MpegEncContext * const s= &w->s;
486
    int ret;
487
   
488
    ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
489
   
490
    if(ret<0) return -1;
491
   
492
    if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
493
        w->hshift= get_bits1(&s->gb);
494
    else 
495
        w->hshift= 0;
496

    
497
//printf("%d %d  ", *mx_ptr, *my_ptr);
498
   
499
    return 0;
500
}
501

    
502
static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
503
    MpegEncContext * const s= &w->s;
504
    int xy, wrap, diff, type;
505
    int16_t *A, *B, *C, *mot_val;
506

    
507
    wrap = s->b8_stride;
508
    xy = s->block_index[0];
509

    
510
    mot_val = s->current_picture.motion_val[0][xy];
511

    
512
    A = s->current_picture.motion_val[0][xy - 1];
513
    B = s->current_picture.motion_val[0][xy - wrap];
514
    C = s->current_picture.motion_val[0][xy + 2 - wrap];
515
    
516
    diff= FFMAX(ABS(A[0] - B[0]), ABS(A[1] - B[1]));
517
    
518
    if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag && diff >= 8)
519
        type= get_bits1(&s->gb);
520
    else
521
        type= 2;
522
    
523
    if(type == 0){
524
        *px= A[0];
525
        *py= A[1];
526
    }else if(type == 1){
527
        *px= B[0];
528
        *py= B[1];
529
    }else{
530
        /* special case for first (slice) line */
531
        if (s->first_slice_line) {
532
            *px = A[0];
533
            *py = A[1];
534
        } else {
535
            *px = mid_pred(A[0], B[0], C[0]);
536
            *py = mid_pred(A[1], B[1], C[1]);
537
        }
538
    }
539

    
540
    return mot_val;
541
}
542

    
543
static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
544
    MpegEncContext * const s= &w->s;
545
    static const int sub_cbp_table[3]= {2,3,1};
546
    int sub_cbp;
547

    
548
    if(!cbp){ 
549
        s->block_last_index[n] = -1;
550

    
551
        return 0;
552
    }
553
    
554
    if(w->per_block_abt)
555
        w->abt_type= decode012(&s->gb);
556
#if 0
557
    if(w->per_block_abt)
558
        printf("B%d", w->abt_type);
559
#endif
560
    w->abt_type_table[n]= w->abt_type;
561

    
562
    if(w->abt_type){
563
//        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
564
        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
565
//        const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
566

    
567
        sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
568
//        printf("S%d", sub_cbp);
569

    
570
        if(sub_cbp&1){
571
            if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
572
                return -1;
573
        }
574
        
575
        if(sub_cbp&2){
576
            if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
577
                return -1;
578
        }
579
        s->block_last_index[n] = 63;
580

    
581
        return 0;
582
    }else{
583
        return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
584
    }
585
}
586

    
587
static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
588
    MpegEncContext * const s= &w->s;
589

    
590
  if (s->block_last_index[n] >= 0) {
591
    switch(w->abt_type_table[n]){
592
    case 0:
593
        s->dsp.idct_add (dst, stride, block1);
594
        break;
595
    case 1:
596
        simple_idct84_add(dst           , stride, block1);
597
        simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
598
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
599
        break;
600
    case 2:
601
        simple_idct48_add(dst           , stride, block1);
602
        simple_idct48_add(dst + 4       , stride, w->abt_block2[n]);
603
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
604
        break;
605
    default:
606
        av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
607
    }
608
  }
609
}
610

    
611
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
612
    Wmv2Context * const w= (Wmv2Context*)s;
613

    
614
    wmv2_add_block(w, block1[0], dest_y                    , s->linesize, 0);
615
    wmv2_add_block(w, block1[1], dest_y + 8                , s->linesize, 1);
616
    wmv2_add_block(w, block1[2], dest_y +     8*s->linesize, s->linesize, 2);
617
    wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
618
    
619
    if(s->flags&CODEC_FLAG_GRAY) return;
620
    
621
    wmv2_add_block(w, block1[4], dest_cb                   , s->uvlinesize, 4);
622
    wmv2_add_block(w, block1[5], dest_cr                   , s->uvlinesize, 5);
623
}
624

    
625
void ff_mspel_motion(MpegEncContext *s,
626
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
627
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
628
                               int motion_x, int motion_y, int h)
629
{
630
    Wmv2Context * const w= (Wmv2Context*)s;
631
    uint8_t *ptr;
632
    int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
633
    int emu=0;
634
    
635
    dxy = ((motion_y & 1) << 1) | (motion_x & 1);
636
    dxy = 2*dxy + w->hshift;
637
    src_x = s->mb_x * 16 + (motion_x >> 1);
638
    src_y = s->mb_y * 16 + (motion_y >> 1);
639
                
640
    /* WARNING: do no forget half pels */
641
    v_edge_pos = s->v_edge_pos;
642
    src_x = clip(src_x, -16, s->width);
643
    src_y = clip(src_y, -16, s->height);
644
    linesize   = s->linesize;
645
    uvlinesize = s->uvlinesize;
646
    ptr = ref_picture[0] + (src_y * linesize) + src_x;
647

    
648
    if(s->flags&CODEC_FLAG_EMU_EDGE){
649
        if(src_x<1 || src_y<1 || src_x + 17  >= s->h_edge_pos
650
                              || src_y + h+1 >= v_edge_pos){
651
            ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19, 
652
                             src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
653
            ptr= s->edge_emu_buffer + 1 + s->linesize;
654
            emu=1;
655
        }
656
    }
657

    
658
    s->dsp.put_mspel_pixels_tab[dxy](dest_y             , ptr             , linesize);
659
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8           , ptr+8           , linesize);
660
    s->dsp.put_mspel_pixels_tab[dxy](dest_y  +8*linesize, ptr  +8*linesize, linesize);
661
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
662

    
663
    if(s->flags&CODEC_FLAG_GRAY) return;
664

    
665
    if (s->out_format == FMT_H263) {
666
        dxy = 0;
667
        if ((motion_x & 3) != 0)
668
            dxy |= 1;
669
        if ((motion_y & 3) != 0)
670
            dxy |= 2;
671
        mx = motion_x >> 2;
672
        my = motion_y >> 2;
673
    } else {
674
        mx = motion_x / 2;
675
        my = motion_y / 2;
676
        dxy = ((my & 1) << 1) | (mx & 1);
677
        mx >>= 1;
678
        my >>= 1;
679
    }
680
    
681
    src_x = s->mb_x * 8 + mx;
682
    src_y = s->mb_y * 8 + my;
683
    src_x = clip(src_x, -8, s->width >> 1);
684
    if (src_x == (s->width >> 1))
685
        dxy &= ~1;
686
    src_y = clip(src_y, -8, s->height >> 1);
687
    if (src_y == (s->height >> 1))
688
        dxy &= ~2;
689
    offset = (src_y * uvlinesize) + src_x;
690
    ptr = ref_picture[1] + offset;
691
    if(emu){
692
        ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, 
693
                         src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
694
        ptr= s->edge_emu_buffer;
695
    }
696
    pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
697

    
698
    ptr = ref_picture[2] + offset;
699
    if(emu){
700
        ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, 
701
                         src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
702
        ptr= s->edge_emu_buffer;
703
    }
704
    pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
705
}
706

    
707

    
708
static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
709
{
710
    Wmv2Context * const w= (Wmv2Context*)s;
711
    int cbp, code, i;
712
    uint8_t *coded_val;
713

    
714
    if(w->j_type) return 0;
715
    
716
    if (s->pict_type == P_TYPE) {
717
        if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
718
            /* skip mb */
719
            s->mb_intra = 0;
720
            for(i=0;i<6;i++)
721
                s->block_last_index[i] = -1;
722
            s->mv_dir = MV_DIR_FORWARD;
723
            s->mv_type = MV_TYPE_16X16;
724
            s->mv[0][0][0] = 0;
725
            s->mv[0][0][1] = 0;
726
            s->mb_skipped = 1;
727
            w->hshift=0;
728
            return 0;
729
        }
730

    
731
        code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
732
        if (code < 0)
733
            return -1;
734
        s->mb_intra = (~code & 0x40) >> 6;
735
            
736
        cbp = code & 0x3f;
737
    } else {
738
        s->mb_intra = 1;
739
        code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
740
        if (code < 0){
741
            av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
742
            return -1;
743
        }
744
        /* predict coded block pattern */
745
        cbp = 0;
746
        for(i=0;i<6;i++) {
747
            int val = ((code >> (5 - i)) & 1);
748
            if (i < 4) {
749
                int pred = coded_block_pred(s, i, &coded_val);
750
                val = val ^ pred;
751
                *coded_val = val;
752
            }
753
            cbp |= val << (5 - i);
754
        }
755
    }
756

    
757
    if (!s->mb_intra) {
758
        int mx, my;
759
//printf("P at %d %d\n", s->mb_x, s->mb_y);
760
        wmv2_pred_motion(w, &mx, &my);
761
        
762
        if(cbp){
763
            s->dsp.clear_blocks(s->block[0]);
764
            if(s->per_mb_rl_table){
765
                s->rl_table_index = decode012(&s->gb);
766
                s->rl_chroma_table_index = s->rl_table_index;
767
            }
768

    
769
            if(w->abt_flag && w->per_mb_abt){
770
                w->per_block_abt= get_bits1(&s->gb);
771
                if(!w->per_block_abt)
772
                    w->abt_type= decode012(&s->gb);
773
            }else
774
                w->per_block_abt=0;
775
        }
776
        
777
        if (wmv2_decode_motion(w, &mx, &my) < 0)
778
            return -1;
779

    
780
        s->mv_dir = MV_DIR_FORWARD;
781
        s->mv_type = MV_TYPE_16X16;
782
        s->mv[0][0][0] = mx;
783
        s->mv[0][0][1] = my;
784

    
785
        for (i = 0; i < 6; i++) {
786
            if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
787
            {
788
                av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
789
                return -1;
790
            }
791
        }    
792
    } else {
793
//if(s->pict_type==P_TYPE)
794
//   printf("%d%d ", s->inter_intra_pred, cbp);
795
//printf("I at %d %d %d %06X\n", s->mb_x, s->mb_y, ((cbp&3)? 1 : 0) +((cbp&0x3C)? 2 : 0), show_bits(&s->gb, 24));
796
        s->ac_pred = get_bits1(&s->gb);
797
        if(s->inter_intra_pred){
798
            s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
799
//            printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
800
        }
801
        if(s->per_mb_rl_table && cbp){
802
            s->rl_table_index = decode012(&s->gb);
803
            s->rl_chroma_table_index = s->rl_table_index;
804
        }
805
    
806
        s->dsp.clear_blocks(s->block[0]);
807
        for (i = 0; i < 6; i++) {
808
            if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
809
            {
810
                av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
811
                return -1;
812
            }
813
        }    
814
    }
815

    
816
    return 0;
817
}
818

    
819
static int wmv2_decode_init(AVCodecContext *avctx){
820
    Wmv2Context * const w= avctx->priv_data;
821
    
822
    if(ff_h263_decode_init(avctx) < 0)
823
        return -1;
824
    
825
    wmv2_common_init(w);
826
    
827
    return 0;
828
}
829

    
830
AVCodec wmv2_decoder = {
831
    "wmv2",
832
    CODEC_TYPE_VIDEO,
833
    CODEC_ID_WMV2,
834
    sizeof(Wmv2Context),
835
    wmv2_decode_init,
836
    NULL,
837
    ff_h263_decode_end,
838
    ff_h263_decode_frame,
839
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
840
};
841

    
842
#ifdef CONFIG_ENCODERS
843
AVCodec wmv2_encoder = {
844
    "wmv2",
845
    CODEC_TYPE_VIDEO,
846
    CODEC_ID_WMV2,
847
    sizeof(Wmv2Context),
848
    wmv2_encode_init,
849
    MPV_encode_picture,
850
    MPV_encode_end,
851
};
852
#endif