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ffmpeg / libavcodec / wmv2.c @ 755bfeab

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1
/*
2
 * Copyright (c) 2002 The FFmpeg Project.
3
 *
4
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU Lesser General Public
8
 * License as published by the Free Software Foundation; either
9
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 *
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 */
21

    
22
/**
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 * @file wmv2.c
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 * wmv2 codec.
25
 */
26

    
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#include "simple_idct.h"
28

    
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#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
33

    
34

    
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typedef struct Wmv2Context{
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    MpegEncContext s;
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    int j_type_bit;
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    int j_type;
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    int flag3;
40
    int flag63;
41
    int abt_flag;
42
    int abt_type;
43
    int abt_type_table[6];
44
    int per_mb_abt;
45
    int per_block_abt;
46
    int mspel_bit;
47
    int cbp_table_index;
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    int top_left_mv_flag;
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    int per_mb_rl_bit;
50
    int skip_type;
51
    int hshift;
52

    
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    ScanTable abt_scantable[2];
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    DECLARE_ALIGNED_8(DCTELEM, abt_block2[6][64]);
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}Wmv2Context;
56

    
57
static void wmv2_common_init(Wmv2Context * w){
58
    MpegEncContext * const s= &w->s;
59

    
60
    ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA);
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    ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB);
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}
63

    
64
#ifdef CONFIG_WMV2_ENCODER
65

    
66
static int encode_ext_header(Wmv2Context *w){
67
    MpegEncContext * const s= &w->s;
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    PutBitContext pb;
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    int code;
70

    
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    init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
72

    
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    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));
75

    
76
    put_bits(&pb, 1, w->mspel_bit=1);
77
    put_bits(&pb, 1, w->flag3=1);
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    put_bits(&pb, 1, w->abt_flag=1);
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    put_bits(&pb, 1, w->j_type_bit=1);
80
    put_bits(&pb, 1, w->top_left_mv_flag=0);
81
    put_bits(&pb, 1, w->per_mb_rl_bit=1);
82
    put_bits(&pb, 3, code=1);
83

    
84
    flush_put_bits(&pb);
85

    
86
    s->slice_height = s->mb_height / code;
87

    
88
    return 0;
89
}
90

    
91
static int wmv2_encode_init(AVCodecContext *avctx){
92
    Wmv2Context * const w= avctx->priv_data;
93

    
94
    if(MPV_encode_init(avctx) < 0)
95
        return -1;
96

    
97
    wmv2_common_init(w);
98

    
99
    avctx->extradata_size= 4;
100
    avctx->extradata= av_mallocz(avctx->extradata_size + 10);
101
    encode_ext_header(w);
102

    
103
    return 0;
104
}
105

    
106
#if 0 /* unused, remove? */
107
static int wmv2_encode_end(AVCodecContext *avctx){
108

109
    if(MPV_encode_end(avctx) < 0)
110
        return -1;
111

112
    avctx->extradata_size= 0;
113
    av_freep(&avctx->extradata);
114

115
    return 0;
116
}
117
#endif
118

    
119
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number)
120
{
121
    Wmv2Context * const w= (Wmv2Context*)s;
122

    
123
    put_bits(&s->pb, 1, s->pict_type - 1);
124
    if(s->pict_type == I_TYPE){
125
        put_bits(&s->pb, 7, 0);
126
    }
127
    put_bits(&s->pb, 5, s->qscale);
128

    
129
    s->dc_table_index = 1;
130
    s->mv_table_index = 1; /* only if P frame */
131
//    s->use_skip_mb_code = 1; /* only if P frame */
132
    s->per_mb_rl_table = 0;
133
    s->mspel= 0;
134
    w->per_mb_abt=0;
135
    w->abt_type=0;
136
    w->j_type=0;
137

    
138
    assert(s->flipflop_rounding);
139

    
140
    if (s->pict_type == I_TYPE) {
141
        assert(s->no_rounding==1);
142
        if(w->j_type_bit) put_bits(&s->pb, 1, w->j_type);
143

    
144
        if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
145

    
146
        if(!s->per_mb_rl_table){
147
            ff_code012(&s->pb, s->rl_chroma_table_index);
148
            ff_code012(&s->pb, s->rl_table_index);
149
        }
150

    
151
        put_bits(&s->pb, 1, s->dc_table_index);
152

    
153
        s->inter_intra_pred= 0;
154
    }else{
155
        int cbp_index;
156

    
157
        put_bits(&s->pb, 2, SKIP_TYPE_NONE);
158

    
159
        ff_code012(&s->pb, cbp_index=0);
160
        if(s->qscale <= 10){
161
            int map[3]= {0,2,1};
162
            w->cbp_table_index= map[cbp_index];
163
        }else if(s->qscale <= 20){
164
            int map[3]= {1,0,2};
165
            w->cbp_table_index= map[cbp_index];
166
        }else{
167
            int map[3]= {2,1,0};
168
            w->cbp_table_index= map[cbp_index];
169
        }
170

    
171
        if(w->mspel_bit) put_bits(&s->pb, 1, s->mspel);
172

    
173
        if(w->abt_flag){
174
            put_bits(&s->pb, 1, w->per_mb_abt^1);
175
            if(!w->per_mb_abt){
176
                ff_code012(&s->pb, w->abt_type);
177
            }
178
        }
179

    
180
        if(w->per_mb_rl_bit) put_bits(&s->pb, 1, s->per_mb_rl_table);
181

    
182
        if(!s->per_mb_rl_table){
183
            ff_code012(&s->pb, s->rl_table_index);
184
            s->rl_chroma_table_index = s->rl_table_index;
185
        }
186
        put_bits(&s->pb, 1, s->dc_table_index);
187
        put_bits(&s->pb, 1, s->mv_table_index);
188

    
189
        s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
190
    }
191
    s->esc3_level_length= 0;
192
    s->esc3_run_length= 0;
193

    
194
    return 0;
195
}
196

    
197
/* Nearly identical to wmv1 but that is just because we do not use the
198
 * useless M$ crap features. It is duplicated here in case someone wants
199
 * to add support for these crap features. */
200
void ff_wmv2_encode_mb(MpegEncContext * s,
201
                       DCTELEM block[6][64],
202
                       int motion_x, int motion_y)
203
{
204
    Wmv2Context * const w= (Wmv2Context*)s;
205
    int cbp, coded_cbp, i;
206
    int pred_x, pred_y;
207
    uint8_t *coded_block;
208

    
209
    handle_slices(s);
210

    
211
    if (!s->mb_intra) {
212
        /* compute cbp */
213
        cbp = 0;
214
        for (i = 0; i < 6; i++) {
215
            if (s->block_last_index[i] >= 0)
216
                cbp |= 1 << (5 - i);
217
        }
218

    
219
        put_bits(&s->pb,
220
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
221
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
222

    
223
        /* motion vector */
224
        h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
225
        msmpeg4_encode_motion(s, motion_x - pred_x,
226
                              motion_y - pred_y);
227
    } else {
228
        /* compute cbp */
229
        cbp = 0;
230
        coded_cbp = 0;
231
        for (i = 0; i < 6; i++) {
232
            int val, pred;
233
            val = (s->block_last_index[i] >= 1);
234
            cbp |= val << (5 - i);
235
            if (i < 4) {
236
                /* predict value for close blocks only for luma */
237
                pred = coded_block_pred(s, i, &coded_block);
238
                *coded_block = val;
239
                val = val ^ pred;
240
            }
241
            coded_cbp |= val << (5 - i);
242
        }
243
#if 0
244
        if (coded_cbp)
245
            printf("cbp=%x %x\n", cbp, coded_cbp);
246
#endif
247

    
248
        if (s->pict_type == I_TYPE) {
249
            put_bits(&s->pb,
250
                     ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
251
        } else {
252
            put_bits(&s->pb,
253
                     wmv2_inter_table[w->cbp_table_index][cbp][1],
254
                     wmv2_inter_table[w->cbp_table_index][cbp][0]);
255
        }
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_WMV2_ENCODER
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_DEBUG, "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
    if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
517
        diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
518
    else
519
        diff=0;
520

    
521
    if(diff >= 8)
522
        type= get_bits1(&s->gb);
523
    else
524
        type= 2;
525

    
526
    if(type == 0){
527
        *px= A[0];
528
        *py= A[1];
529
    }else if(type == 1){
530
        *px= B[0];
531
        *py= B[1];
532
    }else{
533
        /* special case for first (slice) line */
534
        if (s->first_slice_line) {
535
            *px = A[0];
536
            *py = A[1];
537
        } else {
538
            *px = mid_pred(A[0], B[0], C[0]);
539
            *py = mid_pred(A[1], B[1], C[1]);
540
        }
541
    }
542

    
543
    return mot_val;
544
}
545

    
546
static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
547
    MpegEncContext * const s= &w->s;
548
    static const int sub_cbp_table[3]= {2,3,1};
549
    int sub_cbp;
550

    
551
    if(!cbp){
552
        s->block_last_index[n] = -1;
553

    
554
        return 0;
555
    }
556

    
557
    if(w->per_block_abt)
558
        w->abt_type= decode012(&s->gb);
559
#if 0
560
    if(w->per_block_abt)
561
        printf("B%d", w->abt_type);
562
#endif
563
    w->abt_type_table[n]= w->abt_type;
564

    
565
    if(w->abt_type){
566
//        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
567
        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
568
//        const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
569

    
570
        sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
571
//        printf("S%d", sub_cbp);
572

    
573
        if(sub_cbp&1){
574
            if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
575
                return -1;
576
        }
577

    
578
        if(sub_cbp&2){
579
            if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
580
                return -1;
581
        }
582
        s->block_last_index[n] = 63;
583

    
584
        return 0;
585
    }else{
586
        return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
587
    }
588
}
589

    
590
static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
591
    MpegEncContext * const s= &w->s;
592

    
593
  if (s->block_last_index[n] >= 0) {
594
    switch(w->abt_type_table[n]){
595
    case 0:
596
        s->dsp.idct_add (dst, stride, block1);
597
        break;
598
    case 1:
599
        simple_idct84_add(dst           , stride, block1);
600
        simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
601
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
602
        break;
603
    case 2:
604
        simple_idct48_add(dst           , stride, block1);
605
        simple_idct48_add(dst + 4       , stride, w->abt_block2[n]);
606
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
607
        break;
608
    default:
609
        av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
610
    }
611
  }
612
}
613

    
614
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
615
    Wmv2Context * const w= (Wmv2Context*)s;
616

    
617
    wmv2_add_block(w, block1[0], dest_y                    , s->linesize, 0);
618
    wmv2_add_block(w, block1[1], dest_y + 8                , s->linesize, 1);
619
    wmv2_add_block(w, block1[2], dest_y +     8*s->linesize, s->linesize, 2);
620
    wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
621

    
622
    if(s->flags&CODEC_FLAG_GRAY) return;
623

    
624
    wmv2_add_block(w, block1[4], dest_cb                   , s->uvlinesize, 4);
625
    wmv2_add_block(w, block1[5], dest_cr                   , s->uvlinesize, 5);
626
}
627

    
628
void ff_mspel_motion(MpegEncContext *s,
629
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
630
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
631
                               int motion_x, int motion_y, int h)
632
{
633
    Wmv2Context * const w= (Wmv2Context*)s;
634
    uint8_t *ptr;
635
    int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
636
    int emu=0;
637

    
638
    dxy = ((motion_y & 1) << 1) | (motion_x & 1);
639
    dxy = 2*dxy + w->hshift;
640
    src_x = s->mb_x * 16 + (motion_x >> 1);
641
    src_y = s->mb_y * 16 + (motion_y >> 1);
642

    
643
    /* WARNING: do no forget half pels */
644
    v_edge_pos = s->v_edge_pos;
645
    src_x = av_clip(src_x, -16, s->width);
646
    src_y = av_clip(src_y, -16, s->height);
647

    
648
    if(src_x<=-16 || src_x >= s->width)
649
        dxy &= ~3;
650
    if(src_y<=-16 || src_y >= s->height)
651
        dxy &= ~4;
652

    
653
    linesize   = s->linesize;
654
    uvlinesize = s->uvlinesize;
655
    ptr = ref_picture[0] + (src_y * linesize) + src_x;
656

    
657
    if(s->flags&CODEC_FLAG_EMU_EDGE){
658
        if(src_x<1 || src_y<1 || src_x + 17  >= s->h_edge_pos
659
                              || src_y + h+1 >= v_edge_pos){
660
            ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
661
                             src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
662
            ptr= s->edge_emu_buffer + 1 + s->linesize;
663
            emu=1;
664
        }
665
    }
666

    
667
    s->dsp.put_mspel_pixels_tab[dxy](dest_y             , ptr             , linesize);
668
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8           , ptr+8           , linesize);
669
    s->dsp.put_mspel_pixels_tab[dxy](dest_y  +8*linesize, ptr  +8*linesize, linesize);
670
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
671

    
672
    if(s->flags&CODEC_FLAG_GRAY) return;
673

    
674
    if (s->out_format == FMT_H263) {
675
        dxy = 0;
676
        if ((motion_x & 3) != 0)
677
            dxy |= 1;
678
        if ((motion_y & 3) != 0)
679
            dxy |= 2;
680
        mx = motion_x >> 2;
681
        my = motion_y >> 2;
682
    } else {
683
        mx = motion_x / 2;
684
        my = motion_y / 2;
685
        dxy = ((my & 1) << 1) | (mx & 1);
686
        mx >>= 1;
687
        my >>= 1;
688
    }
689

    
690
    src_x = s->mb_x * 8 + mx;
691
    src_y = s->mb_y * 8 + my;
692
    src_x = av_clip(src_x, -8, s->width >> 1);
693
    if (src_x == (s->width >> 1))
694
        dxy &= ~1;
695
    src_y = av_clip(src_y, -8, s->height >> 1);
696
    if (src_y == (s->height >> 1))
697
        dxy &= ~2;
698
    offset = (src_y * uvlinesize) + src_x;
699
    ptr = ref_picture[1] + offset;
700
    if(emu){
701
        ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
702
                         src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
703
        ptr= s->edge_emu_buffer;
704
    }
705
    pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
706

    
707
    ptr = ref_picture[2] + offset;
708
    if(emu){
709
        ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
710
                         src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
711
        ptr= s->edge_emu_buffer;
712
    }
713
    pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
714
}
715

    
716

    
717
static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
718
{
719
    Wmv2Context * const w= (Wmv2Context*)s;
720
    int cbp, code, i;
721
    uint8_t *coded_val;
722

    
723
    if(w->j_type) return 0;
724

    
725
    if (s->pict_type == P_TYPE) {
726
        if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
727
            /* skip mb */
728
            s->mb_intra = 0;
729
            for(i=0;i<6;i++)
730
                s->block_last_index[i] = -1;
731
            s->mv_dir = MV_DIR_FORWARD;
732
            s->mv_type = MV_TYPE_16X16;
733
            s->mv[0][0][0] = 0;
734
            s->mv[0][0][1] = 0;
735
            s->mb_skipped = 1;
736
            w->hshift=0;
737
            return 0;
738
        }
739

    
740
        code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
741
        if (code < 0)
742
            return -1;
743
        s->mb_intra = (~code & 0x40) >> 6;
744

    
745
        cbp = code & 0x3f;
746
    } else {
747
        s->mb_intra = 1;
748
        code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
749
        if (code < 0){
750
            av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
751
            return -1;
752
        }
753
        /* predict coded block pattern */
754
        cbp = 0;
755
        for(i=0;i<6;i++) {
756
            int val = ((code >> (5 - i)) & 1);
757
            if (i < 4) {
758
                int pred = coded_block_pred(s, i, &coded_val);
759
                val = val ^ pred;
760
                *coded_val = val;
761
            }
762
            cbp |= val << (5 - i);
763
        }
764
    }
765

    
766
    if (!s->mb_intra) {
767
        int mx, my;
768
//printf("P at %d %d\n", s->mb_x, s->mb_y);
769
        wmv2_pred_motion(w, &mx, &my);
770

    
771
        if(cbp){
772
            s->dsp.clear_blocks(s->block[0]);
773
            if(s->per_mb_rl_table){
774
                s->rl_table_index = decode012(&s->gb);
775
                s->rl_chroma_table_index = s->rl_table_index;
776
            }
777

    
778
            if(w->abt_flag && w->per_mb_abt){
779
                w->per_block_abt= get_bits1(&s->gb);
780
                if(!w->per_block_abt)
781
                    w->abt_type= decode012(&s->gb);
782
            }else
783
                w->per_block_abt=0;
784
        }
785

    
786
        if (wmv2_decode_motion(w, &mx, &my) < 0)
787
            return -1;
788

    
789
        s->mv_dir = MV_DIR_FORWARD;
790
        s->mv_type = MV_TYPE_16X16;
791
        s->mv[0][0][0] = mx;
792
        s->mv[0][0][1] = my;
793

    
794
        for (i = 0; i < 6; i++) {
795
            if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
796
            {
797
                av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
798
                return -1;
799
            }
800
        }
801
    } else {
802
//if(s->pict_type==P_TYPE)
803
//   printf("%d%d ", s->inter_intra_pred, cbp);
804
//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));
805
        s->ac_pred = get_bits1(&s->gb);
806
        if(s->inter_intra_pred){
807
            s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
808
//            printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
809
        }
810
        if(s->per_mb_rl_table && cbp){
811
            s->rl_table_index = decode012(&s->gb);
812
            s->rl_chroma_table_index = s->rl_table_index;
813
        }
814

    
815
        s->dsp.clear_blocks(s->block[0]);
816
        for (i = 0; i < 6; i++) {
817
            if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
818
            {
819
                av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
820
                return -1;
821
            }
822
        }
823
    }
824

    
825
    return 0;
826
}
827

    
828
static int wmv2_decode_init(AVCodecContext *avctx){
829
    Wmv2Context * const w= avctx->priv_data;
830

    
831
    if(ff_h263_decode_init(avctx) < 0)
832
        return -1;
833

    
834
    wmv2_common_init(w);
835

    
836
    return 0;
837
}
838

    
839
#ifdef CONFIG_WMV2_DECODER
840
AVCodec wmv2_decoder = {
841
    "wmv2",
842
    CODEC_TYPE_VIDEO,
843
    CODEC_ID_WMV2,
844
    sizeof(Wmv2Context),
845
    wmv2_decode_init,
846
    NULL,
847
    ff_h263_decode_end,
848
    ff_h263_decode_frame,
849
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
850
};
851
#endif
852

    
853
#ifdef CONFIG_WMV2_ENCODER
854
AVCodec wmv2_encoder = {
855
    "wmv2",
856
    CODEC_TYPE_VIDEO,
857
    CODEC_ID_WMV2,
858
    sizeof(Wmv2Context),
859
    wmv2_encode_init,
860
    MPV_encode_picture,
861
    MPV_encode_end,
862
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
863
};
864
#endif