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ffmpeg / libavcodec / h263dec.c @ 4e8eed2f

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1 de6d9b64 Fabrice Bellard
/*
2 983e3246 Michael Niedermayer
 * H.263 decoder
3 ff4ec49e Fabrice Bellard
 * Copyright (c) 2001 Fabrice Bellard.
4 de6d9b64 Fabrice Bellard
 *
5 ff4ec49e Fabrice Bellard
 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9 de6d9b64 Fabrice Bellard
 *
10 ff4ec49e Fabrice Bellard
 * This library is distributed in the hope that it will be useful,
11 de6d9b64 Fabrice Bellard
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ff4ec49e Fabrice Bellard
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * Lesser General Public License for more details.
14 de6d9b64 Fabrice Bellard
 *
15 ff4ec49e Fabrice Bellard
 * You should have received a copy of the GNU Lesser General Public
16
 * License along with this library; if not, write to the Free Software
17
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18 de6d9b64 Fabrice Bellard
 */
19 983e3246 Michael Niedermayer
 
20
/**
21
 * @file h263dec.c
22
 * H.263 decoder.
23
 */
24
 
25 de6d9b64 Fabrice Bellard
#include "avcodec.h"
26 6000abfa Fabrice Bellard
#include "dsputil.h"
27 de6d9b64 Fabrice Bellard
#include "mpegvideo.h"
28
29
//#define DEBUG
30 02734c6a Michael Niedermayer
//#define PRINT_FRAME_TIME
31
#ifdef PRINT_FRAME_TIME
32
static inline long long rdtsc()
33
{
34
        long long l;
35
        asm volatile(        "rdtsc\n\t"
36
                : "=A" (l)
37
        );
38
//        printf("%d\n", int(l/1000));
39
        return l;
40
}
41
#endif
42 de6d9b64 Fabrice Bellard
43 1457ab52 Michael Niedermayer
int ff_h263_decode_init(AVCodecContext *avctx)
44 de6d9b64 Fabrice Bellard
{
45
    MpegEncContext *s = avctx->priv_data;
46 519c2b6d Fabrice Bellard
47 bf89e6b1 Fabrice Bellard
    s->avctx = avctx;
48 de6d9b64 Fabrice Bellard
    s->out_format = FMT_H263;
49
50
    s->width = avctx->width;
51
    s->height = avctx->height;
52 92ba5ffb Michael Niedermayer
    s->workaround_bugs= avctx->workaround_bugs;
53 de6d9b64 Fabrice Bellard
54 4d2858de Michael Niedermayer
    // set defaults
55
    s->quant_precision=5;
56
    s->progressive_sequence=1;
57
    s->decode_mb= ff_h263_decode_mb;
58 4e00e76b Michael Niedermayer
    s->low_delay= 1;
59 5fe061a0 Michael Niedermayer
    avctx->pix_fmt= PIX_FMT_YUV420P;
60 4d2858de Michael Niedermayer
61 de6d9b64 Fabrice Bellard
    /* select sub codec */
62
    switch(avctx->codec->id) {
63
    case CODEC_ID_H263:
64 102d3908 Juanjo
        s->gob_number = 0;
65 de6d9b64 Fabrice Bellard
        break;
66 bf89e6b1 Fabrice Bellard
    case CODEC_ID_MPEG4:
67 de6d9b64 Fabrice Bellard
        s->time_increment_bits = 4; /* default value for broken headers */
68
        s->h263_pred = 1;
69 4e00e76b Michael Niedermayer
        s->low_delay = 0; //default, might be overriden in the vol header during header parsing
70 de6d9b64 Fabrice Bellard
        break;
71 84afee34 Michael Niedermayer
    case CODEC_ID_MSMPEG4V1:
72 de6d9b64 Fabrice Bellard
        s->h263_msmpeg4 = 1;
73
        s->h263_pred = 1;
74 84afee34 Michael Niedermayer
        s->msmpeg4_version=1;
75
        break;
76
    case CODEC_ID_MSMPEG4V2:
77
        s->h263_msmpeg4 = 1;
78
        s->h263_pred = 1;
79
        s->msmpeg4_version=2;
80
        break;
81
    case CODEC_ID_MSMPEG4V3:
82
        s->h263_msmpeg4 = 1;
83
        s->h263_pred = 1;
84
        s->msmpeg4_version=3;
85 de6d9b64 Fabrice Bellard
        break;
86 e1a9dbff Michael Niedermayer
    case CODEC_ID_WMV1:
87
        s->h263_msmpeg4 = 1;
88
        s->h263_pred = 1;
89
        s->msmpeg4_version=4;
90
        break;
91 8f8402e4 Michael Niedermayer
    case CODEC_ID_WMV2:
92
        s->h263_msmpeg4 = 1;
93
        s->h263_pred = 1;
94
        s->msmpeg4_version=5;
95
        break;
96 de6d9b64 Fabrice Bellard
    case CODEC_ID_H263I:
97
        s->h263_intel = 1;
98
        break;
99
    default:
100
        return -1;
101
    }
102 d7e9533a Michael Niedermayer
    s->codec_id= avctx->codec->id;
103 93a21abd Michael Niedermayer
104 de6d9b64 Fabrice Bellard
    /* for h263, we allocate the images after having read the header */
105 488fa19a Michael Niedermayer
    if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
106 4949028f Juanjo
        if (MPV_common_init(s) < 0)
107
            return -1;
108 de6d9b64 Fabrice Bellard
109
    if (s->h263_msmpeg4)
110 8f8402e4 Michael Niedermayer
        ff_msmpeg4_decode_init(s);
111 de6d9b64 Fabrice Bellard
    else
112
        h263_decode_init_vlc(s);
113
    
114
    return 0;
115
}
116
117 1457ab52 Michael Niedermayer
int ff_h263_decode_end(AVCodecContext *avctx)
118 de6d9b64 Fabrice Bellard
{
119
    MpegEncContext *s = avctx->priv_data;
120
121
    MPV_common_end(s);
122
    return 0;
123
}
124
125 7866eeff Michael Niedermayer
/**
126
 * retunrs the number of bytes consumed for building the current frame
127
 */
128
static int get_consumed_bytes(MpegEncContext *s, int buf_size){
129
    int pos= (get_bits_count(&s->gb)+7)>>3;
130 d7425f59 Michael Niedermayer
    
131 d5a21172 Michael Niedermayer
    if(s->divx_packed){
132 7866eeff Michael Niedermayer
        //we would have to scan through the whole buf to handle the weird reordering ...
133
        return buf_size; 
134 d7425f59 Michael Niedermayer
    }else if(s->flags&CODEC_FLAG_TRUNCATED){
135
        pos -= s->parse_context.last_index;
136
        if(pos<0) pos=0; // padding is not really read so this might be -1
137
        return pos;
138 7866eeff Michael Niedermayer
    }else{
139
        if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...)
140 77277835 Michael Niedermayer
        if(pos+10>buf_size) pos=buf_size; // oops ;)
141 7866eeff Michael Niedermayer
142
        return pos;
143
    }
144
}
145
146 4d2858de Michael Niedermayer
static int decode_slice(MpegEncContext *s){
147 46b4feec Michael Niedermayer
    const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
148 4d2858de Michael Niedermayer
    s->last_resync_gb= s->gb;
149
    s->first_slice_line= 1;
150
        
151
    s->resync_mb_x= s->mb_x;
152
    s->resync_mb_y= s->mb_y;
153
154
    s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
155
    s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
156
    
157
    if(s->partitioned_frame){
158
        const int qscale= s->qscale;
159
160
        if(s->codec_id==CODEC_ID_MPEG4){
161
            if(ff_mpeg4_decode_partitions(s) < 0)
162
                return -1; 
163
        }
164
        
165
        /* restore variables which where modified */
166
        s->first_slice_line=1;
167
        s->mb_x= s->resync_mb_x;
168
        s->mb_y= s->resync_mb_y;
169
        s->qscale= qscale;
170
        s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
171
        s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
172
    }
173
174
    for(; s->mb_y < s->mb_height; s->mb_y++) {
175
        /* per-row end of slice checks */
176
        if(s->msmpeg4_version){
177
            if(s->resync_mb_y + s->slice_height == s->mb_y){
178 46b4feec Michael Niedermayer
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
179
180 4d2858de Michael Niedermayer
                return 0;
181
            }
182
        }
183
        
184
        if(s->msmpeg4_version==1){
185
            s->last_dc[0]=
186
            s->last_dc[1]=
187
            s->last_dc[2]= 128;
188
        }
189
    
190
        ff_init_block_index(s);
191
        for(; s->mb_x < s->mb_width; s->mb_x++) {
192
            int ret;
193
194
            ff_update_block_index(s);
195
196
            if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
197
                s->first_slice_line=0; 
198
            }
199
200
            /* DCT & quantize */
201 eb4b3dd3 Zdenek Kabelac
            s->dsp.clear_blocks(s->block[0]);
202 4d2858de Michael Niedermayer
            
203
            s->mv_dir = MV_DIR_FORWARD;
204
            s->mv_type = MV_TYPE_16X16;
205 1e491e29 Michael Niedermayer
//            s->mb_skiped = 0;
206 4d2858de Michael Niedermayer
//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
207
            ret= s->decode_mb(s, s->block);
208
            
209
            MPV_decode_mb(s, s->block);
210
211
            if(ret<0){
212 7bc9090a Michael Niedermayer
                const int xy= s->mb_x + s->mb_y*s->mb_stride;
213 4d2858de Michael Niedermayer
                if(ret==SLICE_END){
214 35aa136a Michael Niedermayer
//printf("%d %d %d %06X\n", s->mb_x, s->mb_y, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
215 46b4feec Michael Niedermayer
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
216 a61f8265 Michael Niedermayer
217
                    s->padding_bug_score--;
218
                        
219 4d2858de Michael Niedermayer
                    if(++s->mb_x >= s->mb_width){
220
                        s->mb_x=0;
221 640950c7 Michael Niedermayer
                        ff_draw_horiz_band(s, s->mb_y*16, 16);
222 4d2858de Michael Niedermayer
                        s->mb_y++;
223
                    }
224
                    return 0; 
225
                }else if(ret==SLICE_NOEND){
226
                    fprintf(stderr,"Slice mismatch at MB: %d\n", xy);
227 46b4feec Michael Niedermayer
                    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x+1, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
228 4d2858de Michael Niedermayer
                    return -1;
229
                }
230
                fprintf(stderr,"Error at MB: %d\n", xy);
231 46b4feec Michael Niedermayer
                ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_ERROR|DC_ERROR|MV_ERROR)&part_mask);
232 4d2858de Michael Niedermayer
    
233
                return -1;
234
            }
235
        }
236
        
237 640950c7 Michael Niedermayer
        ff_draw_horiz_band(s, s->mb_y*16, 16);
238 4d2858de Michael Niedermayer
        
239
        s->mb_x= 0;
240
    }
241
    
242
    assert(s->mb_x==0 && s->mb_y==s->mb_height);
243
244 a61f8265 Michael Niedermayer
    /* try to detect the padding bug */
245
    if(      s->codec_id==CODEC_ID_MPEG4
246
       &&   (s->workaround_bugs&FF_BUG_AUTODETECT) 
247 68f593b4 Michael Niedermayer
       &&    s->gb.size_in_bits - get_bits_count(&s->gb) >=0
248
       &&    s->gb.size_in_bits - get_bits_count(&s->gb) < 48
249 96d9cb22 Michael Niedermayer
//       &&   !s->resync_marker
250 a61f8265 Michael Niedermayer
       &&   !s->data_partitioning){
251
        
252
        const int bits_count= get_bits_count(&s->gb);
253 68f593b4 Michael Niedermayer
        const int bits_left = s->gb.size_in_bits - bits_count;
254 a61f8265 Michael Niedermayer
        
255 650faac6 Michael Niedermayer
        if(bits_left==0){
256
            s->padding_bug_score+=16;
257
        }else if(bits_left>8){
258 a61f8265 Michael Niedermayer
            s->padding_bug_score++;
259 8671359b Michael Niedermayer
        } else if(bits_left != 1){
260 a61f8265 Michael Niedermayer
            int v= show_bits(&s->gb, 8);
261
            v|= 0x7F >> (7-(bits_count&7));
262 8671359b Michael Niedermayer
263 a61f8265 Michael Niedermayer
            if(v==0x7F)
264
                s->padding_bug_score--;
265
            else
266
                s->padding_bug_score++;            
267 650faac6 Michael Niedermayer
        }                          
268 a61f8265 Michael Niedermayer
    }
269
270 4d2858de Michael Niedermayer
    // handle formats which dont have unique end markers
271 cb7c98d6 Michael Niedermayer
    if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
272 68f593b4 Michael Niedermayer
        int left= s->gb.size_in_bits - get_bits_count(&s->gb);
273 4d2858de Michael Niedermayer
        int max_extra=7;
274
        
275
        /* no markers in M$ crap */
276
        if(s->msmpeg4_version && s->pict_type==I_TYPE)
277
            max_extra+= 17;
278
        
279
        /* buggy padding but the frame should still end approximately at the bitstream end */
280 cb7c98d6 Michael Niedermayer
        if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
281 4d2858de Michael Niedermayer
            max_extra+= 48;
282 cb7c98d6 Michael Niedermayer
        else if((s->workaround_bugs&FF_BUG_NO_PADDING))
283 4d2858de Michael Niedermayer
            max_extra+= 256*256*256*64;
284
        
285
        if(left>max_extra){
286
            fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
287
        }
288
        else if(left<0){
289
            fprintf(stderr, "overreading %d bits\n", -left);
290
        }else
291 46b4feec Michael Niedermayer
            ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, AC_END|DC_END|MV_END);
292 4d2858de Michael Niedermayer
        
293
        return 0;
294
    }
295 a61f8265 Michael Niedermayer
296 4d2858de Michael Niedermayer
    fprintf(stderr, "slice end not reached but screenspace end (%d left %06X)\n", 
297 68f593b4 Michael Niedermayer
            s->gb.size_in_bits - get_bits_count(&s->gb),
298 4d2858de Michael Niedermayer
            show_bits(&s->gb, 24));
299 46b4feec Michael Niedermayer
            
300
    ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END)&part_mask);
301
302 4d2858de Michael Niedermayer
    return -1;
303
}
304
305 d7425f59 Michael Niedermayer
/**
306
 * finds the end of the current frame in the bitstream.
307
 * @return the position of the first byte of the next frame, or -1
308
 */
309 0c1a9eda Zdenek Kabelac
static int mpeg4_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
310 d7425f59 Michael Niedermayer
    ParseContext *pc= &s->parse_context;
311
    int vop_found, i;
312
    uint32_t state;
313
    
314
    vop_found= pc->frame_start_found;
315
    state= pc->state;
316
    
317
    i=0;
318
    if(!vop_found){
319
        for(i=0; i<buf_size; i++){
320
            state= (state<<8) | buf[i];
321
            if(state == 0x1B6){
322
                i++;
323
                vop_found=1;
324
                break;
325
            }
326
        }
327
    }
328 80097bbf Michael Niedermayer
329
    if(vop_found){    
330
      for(; i<buf_size; i++){
331 d7425f59 Michael Niedermayer
        state= (state<<8) | buf[i];
332
        if((state&0xFFFFFF00) == 0x100){
333
            pc->frame_start_found=0;
334
            pc->state=-1; 
335
            return i-3;
336
        }
337 80097bbf Michael Niedermayer
      }
338 d7425f59 Michael Niedermayer
    }
339
    pc->frame_start_found= vop_found;
340
    pc->state= state;
341 067ff8b1 Michael Niedermayer
    return END_NOT_FOUND;
342 d7425f59 Michael Niedermayer
}
343
344 d07f9043 Michael Niedermayer
static int h263_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
345
    ParseContext *pc= &s->parse_context;
346
    int vop_found, i;
347
    uint32_t state;
348
    
349
    vop_found= pc->frame_start_found;
350
    state= pc->state;
351
    
352
    i=0;
353
    if(!vop_found){
354
        for(i=0; i<buf_size; i++){
355
            state= (state<<8) | buf[i];
356
            if(state>>(32-22) == 0x20){
357
                i++;
358
                vop_found=1;
359
                break;
360
            }
361
        }
362
    }
363
364
    if(vop_found){    
365
      for(; i<buf_size; i++){
366
        state= (state<<8) | buf[i];
367
        if(state>>(32-22) == 0x20){
368
            pc->frame_start_found=0;
369
            pc->state=-1; 
370
            return i-3;
371
        }
372
      }
373
    }
374
    pc->frame_start_found= vop_found;
375
    pc->state= state;
376
    
377
    return END_NOT_FOUND;
378
}
379
380 1457ab52 Michael Niedermayer
int ff_h263_decode_frame(AVCodecContext *avctx, 
381 de6d9b64 Fabrice Bellard
                             void *data, int *data_size,
382 0c1a9eda Zdenek Kabelac
                             uint8_t *buf, int buf_size)
383 de6d9b64 Fabrice Bellard
{
384
    MpegEncContext *s = avctx->priv_data;
385 4d2858de Michael Niedermayer
    int ret,i;
386 492cd3a9 Michael Niedermayer
    AVFrame *pict = data; 
387 5d3cea3a Michael Niedermayer
    float new_aspect;
388
    
389 02734c6a Michael Niedermayer
#ifdef PRINT_FRAME_TIME
390
uint64_t time= rdtsc();
391
#endif
392 de6d9b64 Fabrice Bellard
#ifdef DEBUG
393
    printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);
394
    printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
395
#endif
396 b50eef3a Michael Niedermayer
    s->flags= avctx->flags;
397 6733417a Michael Niedermayer
398 dae9ffc4 Michael Niedermayer
    *data_size = 0;
399
   
400
   /* no supplementary picture */
401 de6d9b64 Fabrice Bellard
    if (buf_size == 0) {
402
        return 0;
403
    }
404 b7a22d84 Michael Niedermayer
405 d7425f59 Michael Niedermayer
    if(s->flags&CODEC_FLAG_TRUNCATED){
406
        int next;
407
        
408
        if(s->codec_id==CODEC_ID_MPEG4){
409
            next= mpeg4_find_frame_end(s, buf, buf_size);
410 d07f9043 Michael Niedermayer
        }else if(s->codec_id==CODEC_ID_H263){
411
            next= h263_find_frame_end(s, buf, buf_size);
412 d7425f59 Michael Niedermayer
        }else{
413
            fprintf(stderr, "this codec doesnt support truncated bitstreams\n");
414
            return -1;
415
        }
416 b7a22d84 Michael Niedermayer
        
417
        if( ff_combine_frame(s, next, &buf, &buf_size) < 0 )
418 d7425f59 Michael Niedermayer
            return buf_size;
419
    }
420 de6d9b64 Fabrice Bellard
421 4a3d7fbc Michael Niedermayer
retry:
422
    
423 4136dd24 Michael Niedermayer
    if(s->bitstream_buffer_size && buf_size<20){ //divx 5.01+ frame reorder
424 68f593b4 Michael Niedermayer
        init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8);
425 51b8fd19 Michael Niedermayer
    }else
426 68f593b4 Michael Niedermayer
        init_get_bits(&s->gb, buf, buf_size*8);
427 4136dd24 Michael Niedermayer
    s->bitstream_buffer_size=0;
428 de6d9b64 Fabrice Bellard
429 3a3d3a42 Michael Niedermayer
    if (!s->context_initialized) {
430 46fd0de8 Michael Niedermayer
        if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
431 3a3d3a42 Michael Niedermayer
            return -1;
432
    }
433 1457ab52 Michael Niedermayer
      
434 de6d9b64 Fabrice Bellard
    /* let's go :-) */
435 1457ab52 Michael Niedermayer
    if (s->msmpeg4_version==5) {
436
        ret= ff_wmv2_decode_picture_header(s);
437
    } else if (s->msmpeg4_version) {
438 de6d9b64 Fabrice Bellard
        ret = msmpeg4_decode_picture_header(s);
439
    } else if (s->h263_pred) {
440 b704e742 Michael Niedermayer
        if(s->avctx->extradata_size && s->picture_number==0){
441
            GetBitContext gb;
442
            
443 68f593b4 Michael Niedermayer
            init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
444 b704e742 Michael Niedermayer
            ret = ff_mpeg4_decode_picture_header(s, &gb);
445
        }
446
        ret = ff_mpeg4_decode_picture_header(s, &s->gb);
447
448 9f9c3229 Michael Niedermayer
        if(s->flags& CODEC_FLAG_LOW_DELAY)
449
            s->low_delay=1;
450 de6d9b64 Fabrice Bellard
    } else if (s->h263_intel) {
451
        ret = intel_h263_decode_picture_header(s);
452
    } else {
453
        ret = h263_decode_picture_header(s);
454 488fa19a Michael Niedermayer
    }
455 4e00e76b Michael Niedermayer
    avctx->has_b_frames= !s->low_delay;
456 4d2858de Michael Niedermayer
457
    if(s->workaround_bugs&FF_BUG_AUTODETECT){
458 0aae3f43 Michael Niedermayer
        if(s->padding_bug_score > -2 && !s->data_partitioning && !s->resync_marker)
459 cb7c98d6 Michael Niedermayer
            s->workaround_bugs |=  FF_BUG_NO_PADDING;
460
        else
461
            s->workaround_bugs &= ~FF_BUG_NO_PADDING;
462
463 7004ffb3 Michael Niedermayer
        if(s->avctx->codec_tag == ff_get_fourcc("XVIX")) 
464 4d2858de Michael Niedermayer
            s->workaround_bugs|= FF_BUG_XVID_ILACE;
465 2b2719ac Michael Niedermayer
#if 0
466 7004ffb3 Michael Niedermayer
        if(s->avctx->codec_tag == ff_get_fourcc("MP4S")) 
467 4d2858de Michael Niedermayer
            s->workaround_bugs|= FF_BUG_AC_VLC;
468
        
469 7004ffb3 Michael Niedermayer
        if(s->avctx->codec_tag == ff_get_fourcc("M4S2")) 
470 4d2858de Michael Niedermayer
            s->workaround_bugs|= FF_BUG_AC_VLC;
471 2b2719ac Michael Niedermayer
#endif
472 7004ffb3 Michael Niedermayer
        if(s->avctx->codec_tag == ff_get_fourcc("UMP4")){
473 4d2858de Michael Niedermayer
            s->workaround_bugs|= FF_BUG_UMP4;
474
            s->workaround_bugs|= FF_BUG_AC_VLC;
475
        }
476 03e93d35 Michael Niedermayer
477
        if(s->divx_version){
478
            s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
479
        }
480 7da71a5c Michael Niedermayer
481 36df8805 Michael Niedermayer
        if(s->divx_version>502){
482
            s->workaround_bugs|= FF_BUG_QPEL_CHROMA2;
483
        }
484
485 7004ffb3 Michael Niedermayer
        if(s->avctx->codec_tag == ff_get_fourcc("XVID") && s->xvid_build==0)
486 7da71a5c Michael Niedermayer
            s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
487
        
488 7004ffb3 Michael Niedermayer
        if(s->avctx->codec_tag == ff_get_fourcc("XVID") && s->xvid_build==0)
489 b92be2af Michael Niedermayer
            s->padding_bug_score= 256*256*256*64;
490
        
491 a6a494fb Michael Niedermayer
        if(s->xvid_build && s->xvid_build<=3)
492
            s->padding_bug_score= 256*256*256*64;
493
        
494 7da71a5c Michael Niedermayer
        if(s->xvid_build && s->xvid_build<=1)
495
            s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
496
497 db794953 Michael Niedermayer
#define SET_QPEL_FUNC(postfix1, postfix2) \
498
    s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\
499
    s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\
500
    s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
501
502
        if(s->lavc_build && s->lavc_build<4653)
503
            s->workaround_bugs|= FF_BUG_STD_QPEL;
504
        
505 c40c3482 Michael Niedermayer
        if(s->lavc_build && s->lavc_build<4655)
506
            s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
507
508
        if(s->divx_version)
509
            s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
510 a61f8265 Michael Niedermayer
//printf("padding_bug_score: %d\n", s->padding_bug_score);
511 d671e2fe Michael Niedermayer
        if(s->divx_version==501 && s->divx_build==20020416)
512
            s->padding_bug_score= 256*256*256*64;
513 1c6dcb0f Michael Niedermayer
514
        if(s->divx_version>=500){
515
            s->workaround_bugs|= FF_BUG_EDGE;
516
        }
517
518 a61f8265 Michael Niedermayer
#if 0
519 4d2858de Michael Niedermayer
        if(s->divx_version==500)
520 d671e2fe Michael Niedermayer
            s->padding_bug_score= 256*256*256*64;
521 4d2858de Michael Niedermayer

522
        /* very ugly XVID padding bug detection FIXME/XXX solve this differently
523
         * lets hope this at least works
524
         */
525
        if(   s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
526
           && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
527
            s->workaround_bugs|= FF_BUG_NO_PADDING;
528
        
529
        if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok
530
            s->workaround_bugs|= FF_BUG_NO_PADDING;
531 a61f8265 Michael Niedermayer
#endif
532 4d2858de Michael Niedermayer
    }
533
    
534 db794953 Michael Niedermayer
    if(s->workaround_bugs& FF_BUG_STD_QPEL){
535
        SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c)
536
        SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c)
537
        SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c)
538
        SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
539
        SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
540
        SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
541
542
        SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c)
543
        SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c)
544
        SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c)
545
        SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
546
        SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
547
        SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
548
    }
549 4d2858de Michael Niedermayer
550 38274ea2 Michael Niedermayer
#if 0 // dump bits per frame / qp / complexity
551
{
552
    static FILE *f=NULL;
553
    if(!f) f=fopen("rate_qp_cplx.txt", "w");
554 32b90921 Michael Niedermayer
    fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
555 38274ea2 Michael Niedermayer
}
556
#endif
557 93a21abd Michael Niedermayer
       
558 488fa19a Michael Niedermayer
        /* After H263 & mpeg4 header decode we have the height, width,*/
559 9eaa4690 Juanjo
        /* and other parameters. So then we could init the picture   */
560
        /* FIXME: By the way H263 decoder is evolving it should have */
561
        /* an H263EncContext                                         */
562 5d3cea3a Michael Niedermayer
    if(s->aspected_height)
563 58b0b0dd Michael Niedermayer
        new_aspect= s->aspected_width*s->width / (float)(s->height*s->aspected_height);
564 5d3cea3a Michael Niedermayer
    else
565
        new_aspect=0;
566 58b0b0dd Michael Niedermayer
    
567 3a3d3a42 Michael Niedermayer
    if (   s->width != avctx->width || s->height != avctx->height 
568 5d3cea3a Michael Niedermayer
        || ABS(new_aspect - avctx->aspect_ratio) > 0.001) {
569 93a21abd Michael Niedermayer
        /* H.263 could change picture size any time */
570
        MPV_common_end(s);
571
    }
572 488fa19a Michael Niedermayer
    if (!s->context_initialized) {
573 525e51e8 Michael Niedermayer
        avctx->width = s->width;
574
        avctx->height = s->height;
575 5d3cea3a Michael Niedermayer
        avctx->aspect_ratio= new_aspect;
576 4d2858de Michael Niedermayer
577 4a3d7fbc Michael Niedermayer
        goto retry;
578 de6d9b64 Fabrice Bellard
    }
579 35aa136a Michael Niedermayer
580
    if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
581
        s->gob_index = ff_h263_get_gob_height(s);
582
583 7866eeff Michael Niedermayer
    if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
584 6733417a Michael Niedermayer
    /* skip if the header was thrashed */
585 8f8402e4 Michael Niedermayer
    if (ret < 0){
586
        fprintf(stderr, "header damaged\n");
587 de6d9b64 Fabrice Bellard
        return -1;
588 8f8402e4 Michael Niedermayer
    }
589 347ae22e Michael Niedermayer
    
590 1e491e29 Michael Niedermayer
    // for hurry_up==5
591
    s->current_picture.pict_type= s->pict_type;
592
    s->current_picture.key_frame= s->pict_type == I_TYPE;
593 347ae22e Michael Niedermayer
594 1c2a8c7f Michael Niedermayer
    /* skip b frames if we dont have reference frames */
595 b536d0aa Michael Niedermayer
    if(s->last_picture_ptr==NULL && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
596 2417652e Michael Niedermayer
    /* skip b frames if we are in a hurry */
597 f8fd15e0 Michael Niedermayer
    if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
598 347ae22e Michael Niedermayer
    /* skip everything if we are in a hurry>=5 */
599 f8fd15e0 Michael Niedermayer
    if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
600 6733417a Michael Niedermayer
    
601
    if(s->next_p_frame_damaged){
602
        if(s->pict_type==B_TYPE)
603 7866eeff Michael Niedermayer
            return get_consumed_bytes(s, buf_size);
604 6733417a Michael Niedermayer
        else
605
            s->next_p_frame_damaged=0;
606
    }
607
608 d6db1c9c Michael Niedermayer
    if(MPV_frame_start(s, avctx) < 0)
609
        return -1;
610 de6d9b64 Fabrice Bellard
611
#ifdef DEBUG
612
    printf("qscale=%d\n", s->qscale);
613
#endif
614
615 46b4feec Michael Niedermayer
    ff_er_frame_start(s);
616 4d2858de Michael Niedermayer
    
617 487bce53 Michael Niedermayer
    //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type
618
    //which isnt available before MPV_frame_start()
619
    if (s->msmpeg4_version==5){
620
        if(ff_wmv2_decode_secondary_picture_header(s) < 0)
621
            return -1;
622
    }
623
624 de6d9b64 Fabrice Bellard
    /* decode each macroblock */
625 4d2858de Michael Niedermayer
    s->mb_x=0; 
626
    s->mb_y=0;
627
    
628
    decode_slice(s);
629 487bce53 Michael Niedermayer
    while(s->mb_y<s->mb_height){
630 4d2858de Michael Niedermayer
        if(s->msmpeg4_version){
631 487bce53 Michael Niedermayer
            if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits)
632 4d2858de Michael Niedermayer
                break;
633
        }else{
634
            if(ff_h263_resync(s)<0)
635
                break;
636 6733417a Michael Niedermayer
        }
637
        
638 28269849 Michael Niedermayer
        if(s->msmpeg4_version<4 && s->h263_pred)
639 4d2858de Michael Niedermayer
            ff_mpeg4_clean_buffers(s);
640 649c00c9 Michael Niedermayer
641 4d2858de Michael Niedermayer
        decode_slice(s);
642 de6d9b64 Fabrice Bellard
    }
643 8b32880c Michael Niedermayer
644 e1a9dbff Michael Niedermayer
    if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
645 1e491e29 Michael Niedermayer
        if(msmpeg4_decode_ext_header(s, buf_size) < 0){
646
            s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
647
        }
648 eec1c6b9 Michael Niedermayer
    
649
    /* divx 5.01+ bistream reorder stuff */
650 d5a21172 Michael Niedermayer
    if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_packed){
651 6733417a Michael Niedermayer
        int current_pos= get_bits_count(&s->gb)>>3;
652
653 eec1c6b9 Michael Niedermayer
        if(   buf_size - current_pos > 5 
654
           && buf_size - current_pos < BITSTREAM_BUFFER_SIZE){
655 6733417a Michael Niedermayer
            int i;
656
            int startcode_found=0;
657 7866eeff Michael Niedermayer
            for(i=current_pos; i<buf_size-3; i++){
658 6733417a Michael Niedermayer
                if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
659
                    startcode_found=1;
660
                    break;
661
                }
662
            }
663
            if(startcode_found){
664
                memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
665
                s->bitstream_buffer_size= buf_size - current_pos;
666
            }
667
        }
668
    }
669
670 46b4feec Michael Niedermayer
    ff_er_frame_end(s);
671 4d2858de Michael Niedermayer
672 de6d9b64 Fabrice Bellard
    MPV_frame_end(s);
673 db794953 Michael Niedermayer
674 db6e7795 Michael Niedermayer
assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
675
assert(s->current_picture.pict_type == s->pict_type);
676 4e00e76b Michael Niedermayer
    if(s->pict_type==B_TYPE || s->low_delay){
677 492cd3a9 Michael Niedermayer
        *pict= *(AVFrame*)&s->current_picture;
678 7bc9090a Michael Niedermayer
        ff_print_debug_info(s, s->current_picture_ptr);
679 6f91bcd1 Michael Niedermayer
    } else {
680 492cd3a9 Michael Niedermayer
        *pict= *(AVFrame*)&s->last_picture;
681 7bc9090a Michael Niedermayer
        ff_print_debug_info(s, s->last_picture_ptr);
682 6f91bcd1 Michael Niedermayer
    }
683 8fc69895 Michael Niedermayer
684 81401c1f Juanjo
    /* Return the Picture timestamp as the frame number */
685
    /* we substract 1 because it is added on utils.c    */
686
    avctx->frame_number = s->picture_number - 1;
687
688 4e00e76b Michael Niedermayer
    /* dont output the last pic after seeking */
689 b536d0aa Michael Niedermayer
    if(s->last_picture_ptr || s->low_delay)
690 492cd3a9 Michael Niedermayer
        *data_size = sizeof(AVFrame);
691 02734c6a Michael Niedermayer
#ifdef PRINT_FRAME_TIME
692
printf("%Ld\n", rdtsc()-time);
693
#endif
694 d07f9043 Michael Niedermayer
695 7866eeff Michael Niedermayer
    return get_consumed_bytes(s, buf_size);
696 de6d9b64 Fabrice Bellard
}
697
698 a77146ab Zdenek Kabelac
static const AVOption mpeg4_decoptions[] =
699
{
700
    AVOPTION_SUB(avoptions_workaround_bug),
701
    AVOPTION_END()
702
};
703
704 bf89e6b1 Fabrice Bellard
AVCodec mpeg4_decoder = {
705
    "mpeg4",
706 de6d9b64 Fabrice Bellard
    CODEC_TYPE_VIDEO,
707 bf89e6b1 Fabrice Bellard
    CODEC_ID_MPEG4,
708 de6d9b64 Fabrice Bellard
    sizeof(MpegEncContext),
709 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
710 de6d9b64 Fabrice Bellard
    NULL,
711 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
712
    ff_h263_decode_frame,
713 d7425f59 Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
714 a77146ab Zdenek Kabelac
    .options = mpeg4_decoptions,
715 de6d9b64 Fabrice Bellard
};
716
717
AVCodec h263_decoder = {
718
    "h263",
719
    CODEC_TYPE_VIDEO,
720
    CODEC_ID_H263,
721
    sizeof(MpegEncContext),
722 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
723 de6d9b64 Fabrice Bellard
    NULL,
724 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
725
    ff_h263_decode_frame,
726 d07f9043 Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
727 de6d9b64 Fabrice Bellard
};
728
729 84afee34 Michael Niedermayer
AVCodec msmpeg4v1_decoder = {
730
    "msmpeg4v1",
731
    CODEC_TYPE_VIDEO,
732
    CODEC_ID_MSMPEG4V1,
733
    sizeof(MpegEncContext),
734 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
735 84afee34 Michael Niedermayer
    NULL,
736 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
737
    ff_h263_decode_frame,
738 93a21abd Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
739 a77146ab Zdenek Kabelac
    mpeg4_decoptions,
740 84afee34 Michael Niedermayer
};
741
742
AVCodec msmpeg4v2_decoder = {
743
    "msmpeg4v2",
744
    CODEC_TYPE_VIDEO,
745
    CODEC_ID_MSMPEG4V2,
746
    sizeof(MpegEncContext),
747 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
748 84afee34 Michael Niedermayer
    NULL,
749 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
750
    ff_h263_decode_frame,
751 93a21abd Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
752 a77146ab Zdenek Kabelac
    mpeg4_decoptions,
753 84afee34 Michael Niedermayer
};
754
755
AVCodec msmpeg4v3_decoder = {
756 de6d9b64 Fabrice Bellard
    "msmpeg4",
757
    CODEC_TYPE_VIDEO,
758 84afee34 Michael Niedermayer
    CODEC_ID_MSMPEG4V3,
759 de6d9b64 Fabrice Bellard
    sizeof(MpegEncContext),
760 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
761 de6d9b64 Fabrice Bellard
    NULL,
762 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
763
    ff_h263_decode_frame,
764 93a21abd Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
765 a77146ab Zdenek Kabelac
    .options = mpeg4_decoptions,
766 de6d9b64 Fabrice Bellard
};
767
768 e1a9dbff Michael Niedermayer
AVCodec wmv1_decoder = {
769
    "wmv1",
770
    CODEC_TYPE_VIDEO,
771
    CODEC_ID_WMV1,
772
    sizeof(MpegEncContext),
773 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
774 8f8402e4 Michael Niedermayer
    NULL,
775 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
776
    ff_h263_decode_frame,
777 93a21abd Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
778 a77146ab Zdenek Kabelac
    mpeg4_decoptions,
779 8f8402e4 Michael Niedermayer
};
780
781 de6d9b64 Fabrice Bellard
AVCodec h263i_decoder = {
782
    "h263i",
783
    CODEC_TYPE_VIDEO,
784
    CODEC_ID_H263I,
785
    sizeof(MpegEncContext),
786 1457ab52 Michael Niedermayer
    ff_h263_decode_init,
787 de6d9b64 Fabrice Bellard
    NULL,
788 1457ab52 Michael Niedermayer
    ff_h263_decode_end,
789
    ff_h263_decode_frame,
790 93a21abd Michael Niedermayer
    CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
791 a77146ab Zdenek Kabelac
    mpeg4_decoptions,
792 de6d9b64 Fabrice Bellard
};