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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
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 * 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
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 * Lesser General Public License for more details.
13
 *
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 * You should have received a copy of the GNU Lesser General Public
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 * 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
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#define SKIP_TYPE_ROW  2
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#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;
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}Wmv2Context;
54

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

    
62
static int encode_ext_header(Wmv2Context *w){
63
    MpegEncContext * const s= &w->s;
64
    PutBitContext pb;
65
    int code;
66
        
67
    init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size, NULL, NULL);
68

    
69
    put_bits(&pb, 5, s->avctx->frame_rate / s->avctx->frame_rate_base); //yes 29.97 -> 29
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    put_bits(&pb, 11, FFMIN(s->bit_rate/1024, 2047));
71
    
72
    put_bits(&pb, 1, w->mspel_bit=1);
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    put_bits(&pb, 1, w->flag3=1);
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    put_bits(&pb, 1, w->abt_flag=1);
75
    put_bits(&pb, 1, w->j_type_bit=1);
76
    put_bits(&pb, 1, w->top_left_mv_flag=0);
77
    put_bits(&pb, 1, w->per_mb_rl_bit=1);
78
    put_bits(&pb, 3, code=1);
79
    
80
    flush_put_bits(&pb);
81

    
82
    s->slice_height = s->mb_height / code;
83
    
84
    return 0;
85
}
86

    
87
#ifdef CONFIG_ENCODERS
88
static int wmv2_encode_init(AVCodecContext *avctx){
89
    Wmv2Context * const w= avctx->priv_data;
90
    
91
    if(MPV_encode_init(avctx) < 0)
92
        return -1;
93
    
94
    wmv2_common_init(w);
95

    
96
    avctx->extradata_size= 4;
97
    avctx->extradata= av_mallocz(avctx->extradata_size + 10);
98
    encode_ext_header(w);
99
    
100
    return 0;
101
}
102

    
103
static int wmv2_encode_end(AVCodecContext *avctx){
104
    Wmv2Context * const w= avctx->priv_data;
105
    
106
    if(MPV_encode_end(avctx) < 0)
107
        return -1;
108
    
109
    avctx->extradata_size= 0;
110
    av_freep(&avctx->extradata);
111
    
112
    return 0;
113
}
114

    
115
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
116
{
117
    Wmv2Context * const w= (Wmv2Context*)s;
118

    
119
    put_bits(&s->pb, 1, s->pict_type - 1);
120
    if(s->pict_type == I_TYPE){
121
        put_bits(&s->pb, 7, 0);
122
    }
123
    put_bits(&s->pb, 5, s->qscale);
124

    
125
    s->dc_table_index = 1;
126
    s->mv_table_index = 1; /* only if P frame */
127
//    s->use_skip_mb_code = 1; /* only if P frame */
128
    s->per_mb_rl_table = 0;
129
    s->mspel= 0;
130
    w->per_mb_abt=0;
131
    w->abt_type=0;
132
    w->j_type=0;
133

    
134
    assert(s->flipflop_rounding);
135

    
136
    if (s->pict_type == I_TYPE) {
137
        assert(s->no_rounding==1);
138
        if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
139
        
140
        if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
141
        
142
        if(!s->per_mb_rl_table){
143
            code012(&s->pb, s->rl_chroma_table_index);
144
            code012(&s->pb, s->rl_table_index);
145
        }
146

    
147
        put_bits(&s->pb, 1, s->dc_table_index);
148

    
149
        s->inter_intra_pred= 0;
150
    }else{
151
        int cbp_index;
152

    
153
        put_bits(&s->pb, 2, SKIP_TYPE_NONE);
154
        
155
        code012(&s->pb, cbp_index=0);
156
        if(s->qscale <= 10){
157
            int map[3]= {0,2,1};
158
            w->cbp_table_index= map[cbp_index];
159
        }else if(s->qscale <= 20){
160
            int map[3]= {1,0,2};
161
            w->cbp_table_index= map[cbp_index];
162
        }else{
163
            int map[3]= {2,1,0};
164
            w->cbp_table_index= map[cbp_index];
165
        }
166

    
167
        if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
168
    
169
        if(w->abt_flag){
170
            put_bits(&s->pb, 1, w->per_mb_abt^1);
171
            if(!w->per_mb_abt){
172
                code012(&s->pb, w->abt_type);
173
            }
174
        }
175

    
176
        if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
177
        
178
        if(!s->per_mb_rl_table){
179
            code012(&s->pb, s->rl_table_index);
180
            s->rl_chroma_table_index = s->rl_table_index;
181
        }
182
        put_bits(&s->pb, 1, s->dc_table_index);
183
        put_bits(&s->pb, 1, s->mv_table_index);
184
    
185
        s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
186
    }
187
    s->esc3_level_length= 0;
188
    s->esc3_run_length= 0;
189

    
190
    return 0;
191
}
192

    
193
// nearly idential to wmv1 but thats just because we dont use the useless M$ crap features
194
// its duplicated here in case someone wants to add support for these carp features
195
void ff_wmv2_encode_mb(MpegEncContext * s, 
196
                       DCTELEM block[6][64],
197
                       int motion_x, int motion_y)
198
{
199
    Wmv2Context * const w= (Wmv2Context*)s;
200
    int cbp, coded_cbp, i;
201
    int pred_x, pred_y;
202
    uint8_t *coded_block;
203

    
204
    handle_slices(s);
205
    
206
    if (!s->mb_intra) {
207
        /* compute cbp */
208
        set_stat(ST_INTER_MB);
209
        cbp = 0;
210
        for (i = 0; i < 6; i++) {
211
            if (s->block_last_index[i] >= 0)
212
                cbp |= 1 << (5 - i);
213
        }
214
        
215
        put_bits(&s->pb, 
216
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][1], 
217
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
218

    
219
        /* motion vector */
220
        h263_pred_motion(s, 0, &pred_x, &pred_y);
221
        msmpeg4_encode_motion(s, motion_x - pred_x, 
222
                              motion_y - pred_y);
223
    } else {
224
        /* compute cbp */
225
        cbp = 0;
226
        coded_cbp = 0;
227
        for (i = 0; i < 6; i++) {
228
            int val, pred;
229
            val = (s->block_last_index[i] >= 1);
230
            cbp |= val << (5 - i);
231
            if (i < 4) {
232
                /* predict value for close blocks only for luma */
233
                pred = coded_block_pred(s, i, &coded_block);
234
                *coded_block = val;
235
                val = val ^ pred;
236
            }
237
            coded_cbp |= val << (5 - i);
238
        }
239
#if 0
240
        if (coded_cbp)
241
            printf("cbp=%x %x\n", cbp, coded_cbp);
242
#endif
243

    
244
        if (s->pict_type == I_TYPE) {
245
            set_stat(ST_INTRA_MB);
246
            put_bits(&s->pb, 
247
                     table_mb_intra[coded_cbp][1], table_mb_intra[coded_cbp][0]);
248
        } else {
249
            put_bits(&s->pb, 
250
                     wmv2_inter_table[w->cbp_table_index][cbp][1], 
251
                     wmv2_inter_table[w->cbp_table_index][cbp][0]);
252
        }
253
        set_stat(ST_INTRA_MB);
254
        put_bits(&s->pb, 1, 0);        /* no AC prediction yet */
255
        if(s->inter_intra_pred){
256
            s->h263_aic_dir=0;
257
            put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
258
        }
259
    }
260

    
261
    for (i = 0; i < 6; i++) {
262
        msmpeg4_encode_block(s, block[i], i);
263
    }
264
}
265
#endif //CONFIG_ENCODERS
266

    
267
static void parse_mb_skip(Wmv2Context * w){
268
    int mb_x, mb_y;
269
    MpegEncContext * const s= &w->s;
270
    uint32_t * const mb_type= s->current_picture_ptr->mb_type;
271

    
272
    w->skip_type= get_bits(&s->gb, 2);
273
    switch(w->skip_type){
274
    case SKIP_TYPE_NONE:
275
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
276
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
277
                mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
278
            }
279
        }
280
        break;
281
    case SKIP_TYPE_MPEG:
282
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
283
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
284
                mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
285
            }
286
        }
287
        break;
288
    case SKIP_TYPE_ROW:
289
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
290
            if(get_bits1(&s->gb)){
291
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
292
                    mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
293
                }
294
            }else{
295
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
296
                    mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
297
                }
298
            }
299
        }
300
        break;
301
    case SKIP_TYPE_COL:
302
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
303
            if(get_bits1(&s->gb)){
304
                for(mb_y=0; mb_y<s->mb_height; mb_y++){
305
                    mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
306
                }
307
            }else{
308
                for(mb_y=0; mb_y<s->mb_height; mb_y++){
309
                    mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
310
                }
311
            }
312
        }
313
        break;
314
    }
315
}
316

    
317
static int decode_ext_header(Wmv2Context *w){
318
    MpegEncContext * const s= &w->s;
319
    GetBitContext gb;
320
    int fps;
321
    int code;
322

    
323
    if(s->avctx->extradata_size<4) return -1;
324
    
325
    init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
326

    
327
    fps                = get_bits(&gb, 5);
328
    s->bit_rate        = get_bits(&gb, 11)*1024;
329
    w->mspel_bit       = get_bits1(&gb);
330
    w->flag3           = get_bits1(&gb);
331
    w->abt_flag        = get_bits1(&gb);
332
    w->j_type_bit      = get_bits1(&gb);
333
    w->top_left_mv_flag= get_bits1(&gb);
334
    w->per_mb_rl_bit   = get_bits1(&gb);
335
    code               = get_bits(&gb, 3);
336
    
337
    if(code==0) return -1;
338

    
339
    s->slice_height = s->mb_height / code;
340

    
341
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
342
        printf("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", 
343
        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, 
344
        code);
345
    }
346
    return 0;
347
}
348

    
349
int ff_wmv2_decode_picture_header(MpegEncContext * s)
350
{
351
    Wmv2Context * const w= (Wmv2Context*)s;
352
    int code, i;
353

    
354
#if 0
355
{
356
int i;
357
for(i=0; i<s->gb.size*8; i++)
358
    printf("%d", get_bits1(&s->gb));
359
//    get_bits1(&s->gb);
360
printf("END\n");
361
return -1;
362
}
363
#endif
364
    if(s->picture_number==0)
365
        decode_ext_header(w);
366

    
367
    s->pict_type = get_bits(&s->gb, 1) + 1;
368
    if(s->pict_type == I_TYPE){
369
        code = get_bits(&s->gb, 7);
370
        printf("I7:%X/\n", code);
371
    }
372
    s->qscale = get_bits(&s->gb, 5);
373

    
374
    if (s->pict_type == I_TYPE) {
375
        if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
376
        else              w->j_type= 0; //FIXME check
377
        
378
        if(!w->j_type){
379
            if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
380
            else                 s->per_mb_rl_table= 0;
381
        
382
            if(!s->per_mb_rl_table){
383
                s->rl_chroma_table_index = decode012(&s->gb);
384
                s->rl_table_index = decode012(&s->gb);
385
            }
386

    
387
            s->dc_table_index = get_bits1(&s->gb);
388
        }
389
        s->inter_intra_pred= 0;
390
        s->no_rounding = 1;
391
        if(s->avctx->debug&FF_DEBUG_PICT_INFO){
392
            printf("qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n", 
393
                s->qscale,
394
                s->rl_chroma_table_index,
395
                s->rl_table_index, 
396
                s->dc_table_index,
397
                s->per_mb_rl_table,
398
                w->j_type);
399
        }
400
    }else{
401
        int cbp_index;
402
        w->j_type=0;
403

    
404
        parse_mb_skip(w);
405
        cbp_index= decode012(&s->gb);
406
        if(s->qscale <= 10){
407
            int map[3]= {0,2,1};
408
            w->cbp_table_index= map[cbp_index];
409
        }else if(s->qscale <= 20){
410
            int map[3]= {1,0,2};
411
            w->cbp_table_index= map[cbp_index];
412
        }else{
413
            int map[3]= {2,1,0};
414
            w->cbp_table_index= map[cbp_index];
415
        }
416

    
417
        if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
418
        else             s->mspel= 0; //FIXME check
419
    
420
        if(w->abt_flag){
421
            w->per_mb_abt= get_bits1(&s->gb)^1;
422
            if(!w->per_mb_abt){
423
                w->abt_type= decode012(&s->gb);
424
            }
425
        }
426

    
427
        if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
428
        else                 s->per_mb_rl_table= 0;
429
        
430
        if(!s->per_mb_rl_table){
431
            s->rl_table_index = decode012(&s->gb);
432
            s->rl_chroma_table_index = s->rl_table_index;
433
        }
434

    
435
        s->dc_table_index = get_bits1(&s->gb);
436
        s->mv_table_index = get_bits1(&s->gb);
437
    
438
        s->inter_intra_pred= (s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
439
        s->no_rounding ^= 1;
440
        
441
        if(s->avctx->debug&FF_DEBUG_PICT_INFO){
442
            printf("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", 
443
                s->rl_table_index, 
444
                s->rl_chroma_table_index, 
445
                s->dc_table_index,
446
                s->mv_table_index,
447
                s->per_mb_rl_table,
448
                s->qscale,
449
                s->mspel,
450
                w->per_mb_abt,
451
                w->abt_type,
452
                w->cbp_table_index,
453
                s->inter_intra_pred);
454
        }
455
    }
456
    s->esc3_level_length= 0;
457
    s->esc3_run_length= 0;
458
    
459
s->picture_number++; //FIXME ?
460

    
461

    
462
//    if(w->j_type)
463
//        return wmv2_decode_j_picture(w); //FIXME
464

    
465
    if(w->j_type){
466
        printf("J-type picture isnt supported\n");
467
        return -1;
468
    }
469

    
470
    return 0;
471
}
472

    
473
static void ff_wmv2_decode_init(MpegEncContext *s){
474
}
475

    
476
static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
477
    MpegEncContext * const s= &w->s;
478
    int ret;
479
   
480
    ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
481
   
482
    if(ret<0) return -1;
483
   
484
    if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
485
        w->hshift= get_bits1(&s->gb);
486
    else 
487
        w->hshift= 0;
488

    
489
//printf("%d %d  ", *mx_ptr, *my_ptr);
490
   
491
    return 0;
492
}
493

    
494
static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
495
    MpegEncContext * const s= &w->s;
496
    int xy, wrap, diff, type;
497
    int16_t *A, *B, *C, *mot_val;
498

    
499
    wrap = s->block_wrap[0];
500
    xy = s->block_index[0];
501

    
502
    mot_val = s->motion_val[xy];
503

    
504
    A = s->motion_val[xy - 1];
505
    B = s->motion_val[xy - wrap];
506
    C = s->motion_val[xy + 2 - wrap];
507
    
508
    diff= FFMAX(ABS(A[0] - B[0]), ABS(A[1] - B[1]));
509
    
510
    if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag && diff >= 8)
511
        type= get_bits1(&s->gb);
512
    else
513
        type= 2;
514
    
515
    if(type == 0){
516
        *px= A[0];
517
        *py= A[1];
518
    }else if(type == 1){
519
        *px= B[0];
520
        *py= B[1];
521
    }else{
522
        /* special case for first (slice) line */
523
        if (s->first_slice_line) {
524
            *px = A[0];
525
            *py = A[1];
526
        } else {
527
            *px = mid_pred(A[0], B[0], C[0]);
528
            *py = mid_pred(A[1], B[1], C[1]);
529
        }
530
    }
531

    
532
    return mot_val;
533
}
534

    
535
static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
536
    MpegEncContext * const s= &w->s;
537
    static const int sub_cbp_table[3]= {2,3,1};
538
    int sub_cbp;
539

    
540
    if(!cbp){ 
541
        s->block_last_index[n] = -1;
542

    
543
        return 0;
544
    }
545
    
546
    if(w->per_block_abt)
547
        w->abt_type= decode012(&s->gb);
548
#if 0
549
    if(w->per_block_abt)
550
        printf("B%d", w->abt_type);
551
#endif
552
    w->abt_type_table[n]= w->abt_type;
553

    
554
    if(w->abt_type){
555
//        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
556
        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
557
//        const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
558

    
559
        sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
560
//        printf("S%d", sub_cbp);
561

    
562
        if(sub_cbp&1){
563
            if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
564
                return -1;
565
        }
566
        
567
        if(sub_cbp&2){
568
            if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
569
                return -1;
570
        }
571
        s->block_last_index[n] = 63;
572

    
573
        return 0;
574
    }else{
575
        return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
576
    }
577
}
578

    
579
static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
580
    MpegEncContext * const s= &w->s;
581
    uint8_t temp[2][64];
582

    
583
    switch(w->abt_type_table[n]){
584
    case 0:
585
        if (s->block_last_index[n] >= 0) {
586
            s->dsp.idct_add (dst, stride, block1);
587
        }
588
        break;
589
    case 1:
590
        simple_idct84_add(dst           , stride, block1);
591
        simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
592
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
593
        break;
594
    case 2:
595
        simple_idct48_add(dst           , stride, block1);
596
        simple_idct48_add(dst + 4       , stride, w->abt_block2[n]);
597
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
598
        break;
599
    default:
600
        fprintf(stderr, "internal error in WMV2 abt\n");
601
    }
602
}
603

    
604
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
605
    Wmv2Context * const w= (Wmv2Context*)s;
606

    
607
    wmv2_add_block(w, block1[0], dest_y                    , s->linesize, 0);
608
    wmv2_add_block(w, block1[1], dest_y + 8                , s->linesize, 1);
609
    wmv2_add_block(w, block1[2], dest_y +     8*s->linesize, s->linesize, 2);
610
    wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
611
    
612
    if(s->flags&CODEC_FLAG_GRAY) return;
613
    
614
    wmv2_add_block(w, block1[4], dest_cb                   , s->uvlinesize, 4);
615
    wmv2_add_block(w, block1[5], dest_cr                   , s->uvlinesize, 5);
616
}
617

    
618
void ff_mspel_motion(MpegEncContext *s,
619
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
620
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
621
                               int motion_x, int motion_y, int h)
622
{
623
    Wmv2Context * const w= (Wmv2Context*)s;
624
    uint8_t *ptr;
625
    int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
626
    int emu=0;
627
    
628
    dxy = ((motion_y & 1) << 1) | (motion_x & 1);
629
    dxy = 2*dxy + w->hshift;
630
    src_x = s->mb_x * 16 + (motion_x >> 1);
631
    src_y = s->mb_y * 16 + (motion_y >> 1);
632
                
633
    /* WARNING: do no forget half pels */
634
    v_edge_pos = s->v_edge_pos;
635
    src_x = clip(src_x, -16, s->width);
636
    src_y = clip(src_y, -16, s->height);
637
    linesize   = s->linesize;
638
    uvlinesize = s->uvlinesize;
639
    ptr = ref_picture[0] + (src_y * linesize) + src_x;
640

    
641
    if(s->flags&CODEC_FLAG_EMU_EDGE){
642
        if(src_x<1 || src_y<1 || src_x + 17  >= s->h_edge_pos
643
                              || src_y + h+1 >= v_edge_pos){
644
            ff_emulated_edge_mc(s, ptr - 1 - s->linesize, s->linesize, 19, 19, 
645
                             src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
646
            ptr= s->edge_emu_buffer + 1 + s->linesize;
647
            emu=1;
648
        }
649
    }
650

    
651
    s->dsp.put_mspel_pixels_tab[dxy](dest_y             , ptr             , linesize);
652
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8           , ptr+8           , linesize);
653
    s->dsp.put_mspel_pixels_tab[dxy](dest_y  +8*linesize, ptr  +8*linesize, linesize);
654
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
655

    
656
    if(s->flags&CODEC_FLAG_GRAY) return;
657

    
658
    if (s->out_format == FMT_H263) {
659
        dxy = 0;
660
        if ((motion_x & 3) != 0)
661
            dxy |= 1;
662
        if ((motion_y & 3) != 0)
663
            dxy |= 2;
664
        mx = motion_x >> 2;
665
        my = motion_y >> 2;
666
    } else {
667
        mx = motion_x / 2;
668
        my = motion_y / 2;
669
        dxy = ((my & 1) << 1) | (mx & 1);
670
        mx >>= 1;
671
        my >>= 1;
672
    }
673
    
674
    src_x = s->mb_x * 8 + mx;
675
    src_y = s->mb_y * 8 + my;
676
    src_x = clip(src_x, -8, s->width >> 1);
677
    if (src_x == (s->width >> 1))
678
        dxy &= ~1;
679
    src_y = clip(src_y, -8, s->height >> 1);
680
    if (src_y == (s->height >> 1))
681
        dxy &= ~2;
682
    offset = (src_y * uvlinesize) + src_x;
683
    ptr = ref_picture[1] + offset;
684
    if(emu){
685
        ff_emulated_edge_mc(s, ptr, s->uvlinesize, 9, 9, 
686
                         src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
687
        ptr= s->edge_emu_buffer;
688
    }
689
    pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
690

    
691
    ptr = ref_picture[2] + offset;
692
    if(emu){
693
        ff_emulated_edge_mc(s, ptr, s->uvlinesize, 9, 9, 
694
                         src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
695
        ptr= s->edge_emu_buffer;
696
    }
697
    pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
698
}
699

    
700

    
701
static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
702
{
703
    Wmv2Context * const w= (Wmv2Context*)s;
704
    int cbp, code, i;
705
    uint8_t *coded_val;
706

    
707
    if(w->j_type) return 0;
708
    
709
    if (s->pict_type == P_TYPE) {
710
        if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
711
            /* skip mb */
712
            s->mb_intra = 0;
713
            for(i=0;i<6;i++)
714
                s->block_last_index[i] = -1;
715
            s->mv_dir = MV_DIR_FORWARD;
716
            s->mv_type = MV_TYPE_16X16;
717
            s->mv[0][0][0] = 0;
718
            s->mv[0][0][1] = 0;
719
            s->mb_skiped = 1;
720
            return 0;
721
        }
722

    
723
        code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
724
        if (code < 0)
725
            return -1;
726
        s->mb_intra = (~code & 0x40) >> 6;
727
            
728
        cbp = code & 0x3f;
729
    } else {
730
        s->mb_intra = 1;
731
        code = get_vlc2(&s->gb, mb_intra_vlc.table, MB_INTRA_VLC_BITS, 2);
732
        if (code < 0){
733
            fprintf(stderr, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
734
            return -1;
735
        }
736
        /* predict coded block pattern */
737
        cbp = 0;
738
        for(i=0;i<6;i++) {
739
            int val = ((code >> (5 - i)) & 1);
740
            if (i < 4) {
741
                int pred = coded_block_pred(s, i, &coded_val);
742
                val = val ^ pred;
743
                *coded_val = val;
744
            }
745
            cbp |= val << (5 - i);
746
        }
747
    }
748

    
749
    if (!s->mb_intra) {
750
        int mx, my;
751
//printf("P at %d %d\n", s->mb_x, s->mb_y);
752
        wmv2_pred_motion(w, &mx, &my);
753
        
754
        if(cbp){
755
            if(s->per_mb_rl_table){
756
                s->rl_table_index = decode012(&s->gb);
757
                s->rl_chroma_table_index = s->rl_table_index;
758
            }
759

    
760
            if(w->abt_flag && w->per_mb_abt){
761
                w->per_block_abt= get_bits1(&s->gb);
762
                if(!w->per_block_abt)
763
                    w->abt_type= decode012(&s->gb);
764
            }else
765
                w->per_block_abt=0;
766
        }
767
        
768
        if (wmv2_decode_motion(w, &mx, &my) < 0)
769
            return -1;
770

    
771
        s->mv_dir = MV_DIR_FORWARD;
772
        s->mv_type = MV_TYPE_16X16;
773
        s->mv[0][0][0] = mx;
774
        s->mv[0][0][1] = my;
775

    
776
        for (i = 0; i < 6; i++) {
777
            if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
778
            {
779
                fprintf(stderr,"\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
780
                return -1;
781
            }
782
        }    
783
    } else {
784
//if(s->pict_type==P_TYPE)
785
//   printf("%d%d ", s->inter_intra_pred, cbp);
786
//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));
787
        s->ac_pred = get_bits1(&s->gb);
788
        if(s->inter_intra_pred){
789
            s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
790
//            printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
791
        }
792
        if(s->per_mb_rl_table && cbp){
793
            s->rl_table_index = decode012(&s->gb);
794
            s->rl_chroma_table_index = s->rl_table_index;
795
        }
796
    
797
        for (i = 0; i < 6; i++) {
798
            if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
799
            {
800
                fprintf(stderr,"\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
801
                return -1;
802
            }
803
        }    
804
    }
805

    
806
    return 0;
807
}
808

    
809
static int wmv2_decode_init(AVCodecContext *avctx){
810
    Wmv2Context * const w= avctx->priv_data;
811
    
812
    if(ff_h263_decode_init(avctx) < 0)
813
        return -1;
814
    
815
    wmv2_common_init(w);
816
    
817
    return 0;
818
}
819

    
820
AVCodec wmv2_decoder = {
821
    "wmv2",
822
    CODEC_TYPE_VIDEO,
823
    CODEC_ID_WMV2,
824
    sizeof(Wmv2Context),
825
    wmv2_decode_init,
826
    NULL,
827
    ff_h263_decode_end,
828
    ff_h263_decode_frame,
829
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
830
};
831

    
832
#ifdef CONFIG_ENCODERS
833
AVCodec wmv2_encoder = {
834
    "wmv2",
835
    CODEC_TYPE_VIDEO,
836
    CODEC_ID_WMV2,
837
    sizeof(Wmv2Context),
838
    wmv2_encode_init,
839
    MPV_encode_picture,
840
    MPV_encode_end,
841
};
842
#endif