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1
/*
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 * Copyright (c) 2002 The FFmpeg Project.
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * 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 2.1 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
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with 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.
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 */
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#include "simple_idct.h"
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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
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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;
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    int flag63;
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    int abt_flag;
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    int abt_type;
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    int abt_type_table[6];
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    int per_mb_abt;
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    int per_block_abt;
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    int mspel_bit;
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    int cbp_table_index;
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    int top_left_mv_flag;
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    int per_mb_rl_bit;
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    int skip_type;
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    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){
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    MpegEncContext * const s= &w->s;
59

    
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    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

    
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#ifdef CONFIG_WMV2_ENCODER
65

    
66
static int encode_ext_header(Wmv2Context *w){
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    MpegEncContext * const s= &w->s;
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    PutBitContext pb;
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    int code;
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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);
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    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);
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    put_bits(&pb, 1, w->per_mb_rl_bit=1);
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    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;
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    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
            code012(&s->pb, s->rl_chroma_table_index);
148
            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
        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
                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
            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 idential to wmv1 but thats just because we dont use the useless M$ crap features
198
// its duplicated here in case someone wants to add support for these carp features
199
void ff_wmv2_encode_mb(MpegEncContext * s,
200
                       DCTELEM block[6][64],
201
                       int motion_x, int motion_y)
202
{
203
    Wmv2Context * const w= (Wmv2Context*)s;
204
    int cbp, coded_cbp, i;
205
    int pred_x, pred_y;
206
    uint8_t *coded_block;
207

    
208
    handle_slices(s);
209

    
210
    if (!s->mb_intra) {
211
        /* compute cbp */
212
        cbp = 0;
213
        for (i = 0; i < 6; i++) {
214
            if (s->block_last_index[i] >= 0)
215
                cbp |= 1 << (5 - i);
216
        }
217

    
218
        put_bits(&s->pb,
219
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
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                 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
221

    
222
        /* motion vector */
223
        h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
224
        msmpeg4_encode_motion(s, motion_x - pred_x,
225
                              motion_y - pred_y);
226
    } else {
227
        /* compute cbp */
228
        cbp = 0;
229
        coded_cbp = 0;
230
        for (i = 0; i < 6; i++) {
231
            int val, pred;
232
            val = (s->block_last_index[i] >= 1);
233
            cbp |= val << (5 - i);
234
            if (i < 4) {
235
                /* predict value for close blocks only for luma */
236
                pred = coded_block_pred(s, i, &coded_block);
237
                *coded_block = val;
238
                val = val ^ pred;
239
            }
240
            coded_cbp |= val << (5 - i);
241
        }
242
#if 0
243
        if (coded_cbp)
244
            printf("cbp=%x %x\n", cbp, coded_cbp);
245
#endif
246

    
247
        if (s->pict_type == I_TYPE) {
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
        put_bits(&s->pb, 1, 0);         /* no AC prediction yet */
256
        if(s->inter_intra_pred){
257
            s->h263_aic_dir=0;
258
            put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
259
        }
260
    }
261

    
262
    for (i = 0; i < 6; i++) {
263
        msmpeg4_encode_block(s, block[i], i);
264
    }
265
}
266
#endif //CONFIG_WMV2_ENCODER
267

    
268
static void parse_mb_skip(Wmv2Context * w){
269
    int mb_x, mb_y;
270
    MpegEncContext * const s= &w->s;
271
    uint32_t * const mb_type= s->current_picture_ptr->mb_type;
272

    
273
    w->skip_type= get_bits(&s->gb, 2);
274
    switch(w->skip_type){
275
    case SKIP_TYPE_NONE:
276
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
277
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
278
                mb_type[mb_y*s->mb_stride + mb_x]= MB_TYPE_16x16 | MB_TYPE_L0;
279
            }
280
        }
281
        break;
282
    case SKIP_TYPE_MPEG:
283
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
284
            for(mb_x=0; mb_x<s->mb_width; mb_x++){
285
                mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
286
            }
287
        }
288
        break;
289
    case SKIP_TYPE_ROW:
290
        for(mb_y=0; mb_y<s->mb_height; mb_y++){
291
            if(get_bits1(&s->gb)){
292
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
293
                    mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
294
                }
295
            }else{
296
                for(mb_x=0; mb_x<s->mb_width; mb_x++){
297
                    mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
298
                }
299
            }
300
        }
301
        break;
302
    case SKIP_TYPE_COL:
303
        for(mb_x=0; mb_x<s->mb_width; mb_x++){
304
            if(get_bits1(&s->gb)){
305
                for(mb_y=0; mb_y<s->mb_height; mb_y++){
306
                    mb_type[mb_y*s->mb_stride + mb_x]=  MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
307
                }
308
            }else{
309
                for(mb_y=0; mb_y<s->mb_height; mb_y++){
310
                    mb_type[mb_y*s->mb_stride + mb_x]= (get_bits1(&s->gb) ? MB_TYPE_SKIP : 0) | MB_TYPE_16x16 | MB_TYPE_L0;
311
                }
312
            }
313
        }
314
        break;
315
    }
316
}
317

    
318
static int decode_ext_header(Wmv2Context *w){
319
    MpegEncContext * const s= &w->s;
320
    GetBitContext gb;
321
    int fps;
322
    int code;
323

    
324
    if(s->avctx->extradata_size<4) return -1;
325

    
326
    init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
327

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

    
338
    if(code==0) return -1;
339

    
340
    s->slice_height = s->mb_height / code;
341

    
342
    if(s->avctx->debug&FF_DEBUG_PICT_INFO){
343
        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",
344
        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,
345
        code);
346
    }
347
    return 0;
348
}
349

    
350
int ff_wmv2_decode_picture_header(MpegEncContext * s)
351
{
352
    Wmv2Context * const w= (Wmv2Context*)s;
353
    int code;
354

    
355
#if 0
356
{
357
int i;
358
for(i=0; i<s->gb.size*8; i++)
359
    printf("%d", get_bits1(&s->gb));
360
//    get_bits1(&s->gb);
361
printf("END\n");
362
return -1;
363
}
364
#endif
365
    if(s->picture_number==0)
366
        decode_ext_header(w);
367

    
368
    s->pict_type = get_bits(&s->gb, 1) + 1;
369
    if(s->pict_type == I_TYPE){
370
        code = get_bits(&s->gb, 7);
371
        av_log(s->avctx, AV_LOG_DEBUG, "I7:%X/\n", code);
372
    }
373
    s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
374
    if(s->qscale < 0)
375
       return -1;
376

    
377
    return 0;
378
}
379

    
380
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s)
381
{
382
    Wmv2Context * const w= (Wmv2Context*)s;
383

    
384
    if (s->pict_type == I_TYPE) {
385
        if(w->j_type_bit) w->j_type= get_bits1(&s->gb);
386
        else              w->j_type= 0; //FIXME check
387

    
388
        if(!w->j_type){
389
            if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
390
            else                 s->per_mb_rl_table= 0;
391

    
392
            if(!s->per_mb_rl_table){
393
                s->rl_chroma_table_index = decode012(&s->gb);
394
                s->rl_table_index = decode012(&s->gb);
395
            }
396

    
397
            s->dc_table_index = get_bits1(&s->gb);
398
        }
399
        s->inter_intra_pred= 0;
400
        s->no_rounding = 1;
401
        if(s->avctx->debug&FF_DEBUG_PICT_INFO){
402
            av_log(s->avctx, AV_LOG_DEBUG, "qscale:%d rlc:%d rl:%d dc:%d mbrl:%d j_type:%d \n",
403
                s->qscale,
404
                s->rl_chroma_table_index,
405
                s->rl_table_index,
406
                s->dc_table_index,
407
                s->per_mb_rl_table,
408
                w->j_type);
409
        }
410
    }else{
411
        int cbp_index;
412
        w->j_type=0;
413

    
414
        parse_mb_skip(w);
415
        cbp_index= decode012(&s->gb);
416
        if(s->qscale <= 10){
417
            int map[3]= {0,2,1};
418
            w->cbp_table_index= map[cbp_index];
419
        }else if(s->qscale <= 20){
420
            int map[3]= {1,0,2};
421
            w->cbp_table_index= map[cbp_index];
422
        }else{
423
            int map[3]= {2,1,0};
424
            w->cbp_table_index= map[cbp_index];
425
        }
426

    
427
        if(w->mspel_bit) s->mspel= get_bits1(&s->gb);
428
        else             s->mspel= 0; //FIXME check
429

    
430
        if(w->abt_flag){
431
            w->per_mb_abt= get_bits1(&s->gb)^1;
432
            if(!w->per_mb_abt){
433
                w->abt_type= decode012(&s->gb);
434
            }
435
        }
436

    
437
        if(w->per_mb_rl_bit) s->per_mb_rl_table= get_bits1(&s->gb);
438
        else                 s->per_mb_rl_table= 0;
439

    
440
        if(!s->per_mb_rl_table){
441
            s->rl_table_index = decode012(&s->gb);
442
            s->rl_chroma_table_index = s->rl_table_index;
443
        }
444

    
445
        s->dc_table_index = get_bits1(&s->gb);
446
        s->mv_table_index = get_bits1(&s->gb);
447

    
448
        s->inter_intra_pred= 0;//(s->width*s->height < 320*240 && s->bit_rate<=II_BITRATE);
449
        s->no_rounding ^= 1;
450

    
451
        if(s->avctx->debug&FF_DEBUG_PICT_INFO){
452
            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",
453
                s->rl_table_index,
454
                s->rl_chroma_table_index,
455
                s->dc_table_index,
456
                s->mv_table_index,
457
                s->per_mb_rl_table,
458
                s->qscale,
459
                s->mspel,
460
                w->per_mb_abt,
461
                w->abt_type,
462
                w->cbp_table_index,
463
                s->inter_intra_pred);
464
        }
465
    }
466
    s->esc3_level_length= 0;
467
    s->esc3_run_length= 0;
468

    
469
s->picture_number++; //FIXME ?
470

    
471

    
472
//    if(w->j_type)
473
//        return wmv2_decode_j_picture(w); //FIXME
474

    
475
    if(w->j_type){
476
        av_log(s->avctx, AV_LOG_ERROR, "J-type picture is not supported\n");
477
        return -1;
478
    }
479

    
480
    return 0;
481
}
482

    
483
static inline int wmv2_decode_motion(Wmv2Context *w, int *mx_ptr, int *my_ptr){
484
    MpegEncContext * const s= &w->s;
485
    int ret;
486

    
487
    ret= msmpeg4_decode_motion(s, mx_ptr, my_ptr);
488

    
489
    if(ret<0) return -1;
490

    
491
    if((((*mx_ptr)|(*my_ptr)) & 1) && s->mspel)
492
        w->hshift= get_bits1(&s->gb);
493
    else
494
        w->hshift= 0;
495

    
496
//printf("%d %d  ", *mx_ptr, *my_ptr);
497

    
498
    return 0;
499
}
500

    
501
static int16_t *wmv2_pred_motion(Wmv2Context *w, int *px, int *py){
502
    MpegEncContext * const s= &w->s;
503
    int xy, wrap, diff, type;
504
    int16_t *A, *B, *C, *mot_val;
505

    
506
    wrap = s->b8_stride;
507
    xy = s->block_index[0];
508

    
509
    mot_val = s->current_picture.motion_val[0][xy];
510

    
511
    A = s->current_picture.motion_val[0][xy - 1];
512
    B = s->current_picture.motion_val[0][xy - wrap];
513
    C = s->current_picture.motion_val[0][xy + 2 - wrap];
514

    
515
    if(s->mb_x && !s->first_slice_line && !s->mspel && w->top_left_mv_flag)
516
        diff= FFMAX(FFABS(A[0] - B[0]), FFABS(A[1] - B[1]));
517
    else
518
        diff=0;
519

    
520
    if(diff >= 8)
521
        type= get_bits1(&s->gb);
522
    else
523
        type= 2;
524

    
525
    if(type == 0){
526
        *px= A[0];
527
        *py= A[1];
528
    }else if(type == 1){
529
        *px= B[0];
530
        *py= B[1];
531
    }else{
532
        /* special case for first (slice) line */
533
        if (s->first_slice_line) {
534
            *px = A[0];
535
            *py = A[1];
536
        } else {
537
            *px = mid_pred(A[0], B[0], C[0]);
538
            *py = mid_pred(A[1], B[1], C[1]);
539
        }
540
    }
541

    
542
    return mot_val;
543
}
544

    
545
static inline int wmv2_decode_inter_block(Wmv2Context *w, DCTELEM *block, int n, int cbp){
546
    MpegEncContext * const s= &w->s;
547
    static const int sub_cbp_table[3]= {2,3,1};
548
    int sub_cbp;
549

    
550
    if(!cbp){
551
        s->block_last_index[n] = -1;
552

    
553
        return 0;
554
    }
555

    
556
    if(w->per_block_abt)
557
        w->abt_type= decode012(&s->gb);
558
#if 0
559
    if(w->per_block_abt)
560
        printf("B%d", w->abt_type);
561
#endif
562
    w->abt_type_table[n]= w->abt_type;
563

    
564
    if(w->abt_type){
565
//        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].permutated;
566
        const uint8_t *scantable= w->abt_scantable[w->abt_type-1].scantable;
567
//        const uint8_t *scantable= w->abt_type-1 ? w->abt_scantable[1].permutated : w->abt_scantable[0].scantable;
568

    
569
        sub_cbp= sub_cbp_table[ decode012(&s->gb) ];
570
//        printf("S%d", sub_cbp);
571

    
572
        if(sub_cbp&1){
573
            if (msmpeg4_decode_block(s, block, n, 1, scantable) < 0)
574
                return -1;
575
        }
576

    
577
        if(sub_cbp&2){
578
            if (msmpeg4_decode_block(s, w->abt_block2[n], n, 1, scantable) < 0)
579
                return -1;
580
        }
581
        s->block_last_index[n] = 63;
582

    
583
        return 0;
584
    }else{
585
        return msmpeg4_decode_block(s, block, n, 1, s->inter_scantable.permutated);
586
    }
587
}
588

    
589
static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
590
    MpegEncContext * const s= &w->s;
591

    
592
  if (s->block_last_index[n] >= 0) {
593
    switch(w->abt_type_table[n]){
594
    case 0:
595
        s->dsp.idct_add (dst, stride, block1);
596
        break;
597
    case 1:
598
        simple_idct84_add(dst           , stride, block1);
599
        simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
600
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
601
        break;
602
    case 2:
603
        simple_idct48_add(dst           , stride, block1);
604
        simple_idct48_add(dst + 4       , stride, w->abt_block2[n]);
605
        memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM));
606
        break;
607
    default:
608
        av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
609
    }
610
  }
611
}
612

    
613
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block1[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr){
614
    Wmv2Context * const w= (Wmv2Context*)s;
615

    
616
    wmv2_add_block(w, block1[0], dest_y                    , s->linesize, 0);
617
    wmv2_add_block(w, block1[1], dest_y + 8                , s->linesize, 1);
618
    wmv2_add_block(w, block1[2], dest_y +     8*s->linesize, s->linesize, 2);
619
    wmv2_add_block(w, block1[3], dest_y + 8 + 8*s->linesize, s->linesize, 3);
620

    
621
    if(s->flags&CODEC_FLAG_GRAY) return;
622

    
623
    wmv2_add_block(w, block1[4], dest_cb                   , s->uvlinesize, 4);
624
    wmv2_add_block(w, block1[5], dest_cr                   , s->uvlinesize, 5);
625
}
626

    
627
void ff_mspel_motion(MpegEncContext *s,
628
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
629
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
630
                               int motion_x, int motion_y, int h)
631
{
632
    Wmv2Context * const w= (Wmv2Context*)s;
633
    uint8_t *ptr;
634
    int dxy, offset, mx, my, src_x, src_y, v_edge_pos, linesize, uvlinesize;
635
    int emu=0;
636

    
637
    dxy = ((motion_y & 1) << 1) | (motion_x & 1);
638
    dxy = 2*dxy + w->hshift;
639
    src_x = s->mb_x * 16 + (motion_x >> 1);
640
    src_y = s->mb_y * 16 + (motion_y >> 1);
641

    
642
    /* WARNING: do no forget half pels */
643
    v_edge_pos = s->v_edge_pos;
644
    src_x = av_clip(src_x, -16, s->width);
645
    src_y = av_clip(src_y, -16, s->height);
646

    
647
    if(src_x<=-16 || src_x >= s->width)
648
        dxy &= ~3;
649
    if(src_y<=-16 || src_y >= s->height)
650
        dxy &= ~4;
651

    
652
    linesize   = s->linesize;
653
    uvlinesize = s->uvlinesize;
654
    ptr = ref_picture[0] + (src_y * linesize) + src_x;
655

    
656
    if(s->flags&CODEC_FLAG_EMU_EDGE){
657
        if(src_x<1 || src_y<1 || src_x + 17  >= s->h_edge_pos
658
                              || src_y + h+1 >= v_edge_pos){
659
            ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19,
660
                             src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos);
661
            ptr= s->edge_emu_buffer + 1 + s->linesize;
662
            emu=1;
663
        }
664
    }
665

    
666
    s->dsp.put_mspel_pixels_tab[dxy](dest_y             , ptr             , linesize);
667
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8           , ptr+8           , linesize);
668
    s->dsp.put_mspel_pixels_tab[dxy](dest_y  +8*linesize, ptr  +8*linesize, linesize);
669
    s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize);
670

    
671
    if(s->flags&CODEC_FLAG_GRAY) return;
672

    
673
    if (s->out_format == FMT_H263) {
674
        dxy = 0;
675
        if ((motion_x & 3) != 0)
676
            dxy |= 1;
677
        if ((motion_y & 3) != 0)
678
            dxy |= 2;
679
        mx = motion_x >> 2;
680
        my = motion_y >> 2;
681
    } else {
682
        mx = motion_x / 2;
683
        my = motion_y / 2;
684
        dxy = ((my & 1) << 1) | (mx & 1);
685
        mx >>= 1;
686
        my >>= 1;
687
    }
688

    
689
    src_x = s->mb_x * 8 + mx;
690
    src_y = s->mb_y * 8 + my;
691
    src_x = av_clip(src_x, -8, s->width >> 1);
692
    if (src_x == (s->width >> 1))
693
        dxy &= ~1;
694
    src_y = av_clip(src_y, -8, s->height >> 1);
695
    if (src_y == (s->height >> 1))
696
        dxy &= ~2;
697
    offset = (src_y * uvlinesize) + src_x;
698
    ptr = ref_picture[1] + 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_cb, ptr, uvlinesize, h >> 1);
705

    
706
    ptr = ref_picture[2] + offset;
707
    if(emu){
708
        ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9,
709
                         src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
710
        ptr= s->edge_emu_buffer;
711
    }
712
    pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
713
}
714

    
715

    
716
static int wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
717
{
718
    Wmv2Context * const w= (Wmv2Context*)s;
719
    int cbp, code, i;
720
    uint8_t *coded_val;
721

    
722
    if(w->j_type) return 0;
723

    
724
    if (s->pict_type == P_TYPE) {
725
        if(IS_SKIP(s->current_picture.mb_type[s->mb_y * s->mb_stride + s->mb_x])){
726
            /* skip mb */
727
            s->mb_intra = 0;
728
            for(i=0;i<6;i++)
729
                s->block_last_index[i] = -1;
730
            s->mv_dir = MV_DIR_FORWARD;
731
            s->mv_type = MV_TYPE_16X16;
732
            s->mv[0][0][0] = 0;
733
            s->mv[0][0][1] = 0;
734
            s->mb_skipped = 1;
735
            w->hshift=0;
736
            return 0;
737
        }
738

    
739
        code = get_vlc2(&s->gb, mb_non_intra_vlc[w->cbp_table_index].table, MB_NON_INTRA_VLC_BITS, 3);
740
        if (code < 0)
741
            return -1;
742
        s->mb_intra = (~code & 0x40) >> 6;
743

    
744
        cbp = code & 0x3f;
745
    } else {
746
        s->mb_intra = 1;
747
        code = get_vlc2(&s->gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
748
        if (code < 0){
749
            av_log(s->avctx, AV_LOG_ERROR, "II-cbp illegal at %d %d\n", s->mb_x, s->mb_y);
750
            return -1;
751
        }
752
        /* predict coded block pattern */
753
        cbp = 0;
754
        for(i=0;i<6;i++) {
755
            int val = ((code >> (5 - i)) & 1);
756
            if (i < 4) {
757
                int pred = coded_block_pred(s, i, &coded_val);
758
                val = val ^ pred;
759
                *coded_val = val;
760
            }
761
            cbp |= val << (5 - i);
762
        }
763
    }
764

    
765
    if (!s->mb_intra) {
766
        int mx, my;
767
//printf("P at %d %d\n", s->mb_x, s->mb_y);
768
        wmv2_pred_motion(w, &mx, &my);
769

    
770
        if(cbp){
771
            s->dsp.clear_blocks(s->block[0]);
772
            if(s->per_mb_rl_table){
773
                s->rl_table_index = decode012(&s->gb);
774
                s->rl_chroma_table_index = s->rl_table_index;
775
            }
776

    
777
            if(w->abt_flag && w->per_mb_abt){
778
                w->per_block_abt= get_bits1(&s->gb);
779
                if(!w->per_block_abt)
780
                    w->abt_type= decode012(&s->gb);
781
            }else
782
                w->per_block_abt=0;
783
        }
784

    
785
        if (wmv2_decode_motion(w, &mx, &my) < 0)
786
            return -1;
787

    
788
        s->mv_dir = MV_DIR_FORWARD;
789
        s->mv_type = MV_TYPE_16X16;
790
        s->mv[0][0][0] = mx;
791
        s->mv[0][0][1] = my;
792

    
793
        for (i = 0; i < 6; i++) {
794
            if (wmv2_decode_inter_block(w, block[i], i, (cbp >> (5 - i)) & 1) < 0)
795
            {
796
                av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding inter block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
797
                return -1;
798
            }
799
        }
800
    } else {
801
//if(s->pict_type==P_TYPE)
802
//   printf("%d%d ", s->inter_intra_pred, cbp);
803
//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));
804
        s->ac_pred = get_bits1(&s->gb);
805
        if(s->inter_intra_pred){
806
            s->h263_aic_dir= get_vlc2(&s->gb, inter_intra_vlc.table, INTER_INTRA_VLC_BITS, 1);
807
//            printf("%d%d %d %d/", s->ac_pred, s->h263_aic_dir, s->mb_x, s->mb_y);
808
        }
809
        if(s->per_mb_rl_table && cbp){
810
            s->rl_table_index = decode012(&s->gb);
811
            s->rl_chroma_table_index = s->rl_table_index;
812
        }
813

    
814
        s->dsp.clear_blocks(s->block[0]);
815
        for (i = 0; i < 6; i++) {
816
            if (msmpeg4_decode_block(s, block[i], i, (cbp >> (5 - i)) & 1, NULL) < 0)
817
            {
818
                av_log(s->avctx, AV_LOG_ERROR, "\nerror while decoding intra block: %d x %d (%d)\n", s->mb_x, s->mb_y, i);
819
                return -1;
820
            }
821
        }
822
    }
823

    
824
    return 0;
825
}
826

    
827
static int wmv2_decode_init(AVCodecContext *avctx){
828
    Wmv2Context * const w= avctx->priv_data;
829

    
830
    if(ff_h263_decode_init(avctx) < 0)
831
        return -1;
832

    
833
    wmv2_common_init(w);
834

    
835
    return 0;
836
}
837

    
838
#ifdef CONFIG_WMV2_DECODER
839
AVCodec wmv2_decoder = {
840
    "wmv2",
841
    CODEC_TYPE_VIDEO,
842
    CODEC_ID_WMV2,
843
    sizeof(Wmv2Context),
844
    wmv2_decode_init,
845
    NULL,
846
    ff_h263_decode_end,
847
    ff_h263_decode_frame,
848
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
849
};
850
#endif
851

    
852
#ifdef CONFIG_WMV2_ENCODER
853
AVCodec wmv2_encoder = {
854
    "wmv2",
855
    CODEC_TYPE_VIDEO,
856
    CODEC_ID_WMV2,
857
    sizeof(Wmv2Context),
858
    wmv2_encode_init,
859
    MPV_encode_picture,
860
    MPV_encode_end,
861
    .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
862
};
863
#endif