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[libav.git] / libavcodec / h263dec.c
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de6d9b64 1/*
983e3246 2 * H.263 decoder
ff4ec49e 3 * Copyright (c) 2001 Fabrice Bellard.
8f2ab833 4 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
de6d9b64 5 *
b78e7197
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6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
ff4ec49e
FB
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
b78e7197 11 * version 2.1 of the License, or (at your option) any later version.
de6d9b64 12 *
b78e7197 13 * FFmpeg is distributed in the hope that it will be useful,
de6d9b64 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ff4ec49e
FB
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
de6d9b64 17 *
ff4ec49e 18 * You should have received a copy of the GNU Lesser General Public
b78e7197 19 * License along with FFmpeg; if not, write to the Free Software
5509bffa 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
de6d9b64 21 */
115329f1 22
983e3246
MN
23/**
24 * @file h263dec.c
25 * H.263 decoder.
26 */
115329f1 27
de6d9b64 28#include "avcodec.h"
6000abfa 29#include "dsputil.h"
de6d9b64 30#include "mpegvideo.h"
c33d9814 31#include "h263_parser.h"
df495dbd 32#include "mpeg4video_parser.h"
15025553 33#include "msmpeg4.h"
de6d9b64
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34
35//#define DEBUG
02734c6a 36//#define PRINT_FRAME_TIME
de6d9b64 37
1457ab52 38int ff_h263_decode_init(AVCodecContext *avctx)
de6d9b64
FB
39{
40 MpegEncContext *s = avctx->priv_data;
519c2b6d 41
bf89e6b1 42 s->avctx = avctx;
de6d9b64
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43 s->out_format = FMT_H263;
44
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MN
45 s->width = avctx->coded_width;
46 s->height = avctx->coded_height;
92ba5ffb 47 s->workaround_bugs= avctx->workaround_bugs;
de6d9b64 48
4d2858de 49 // set defaults
3edcacde 50 MPV_decode_defaults(s);
4d2858de 51 s->quant_precision=5;
4d2858de 52 s->decode_mb= ff_h263_decode_mb;
4e00e76b 53 s->low_delay= 1;
5fe061a0 54 avctx->pix_fmt= PIX_FMT_YUV420P;
a573cc27 55 s->unrestricted_mv= 1;
4d2858de 56
de6d9b64
FB
57 /* select sub codec */
58 switch(avctx->codec->id) {
59 case CODEC_ID_H263:
68b94c35 60 s->unrestricted_mv= 0;
de6d9b64 61 break;
bf89e6b1 62 case CODEC_ID_MPEG4:
fcfee63b 63 s->decode_mb= ff_mpeg4_decode_mb;
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64 s->time_increment_bits = 4; /* default value for broken headers */
65 s->h263_pred = 1;
4e00e76b 66 s->low_delay = 0; //default, might be overriden in the vol header during header parsing
de6d9b64 67 break;
84afee34 68 case CODEC_ID_MSMPEG4V1:
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69 s->h263_msmpeg4 = 1;
70 s->h263_pred = 1;
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71 s->msmpeg4_version=1;
72 break;
73 case CODEC_ID_MSMPEG4V2:
74 s->h263_msmpeg4 = 1;
75 s->h263_pred = 1;
76 s->msmpeg4_version=2;
77 break;
78 case CODEC_ID_MSMPEG4V3:
79 s->h263_msmpeg4 = 1;
80 s->h263_pred = 1;
81 s->msmpeg4_version=3;
de6d9b64 82 break;
e1a9dbff
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83 case CODEC_ID_WMV1:
84 s->h263_msmpeg4 = 1;
85 s->h263_pred = 1;
86 s->msmpeg4_version=4;
87 break;
8f8402e4
MN
88 case CODEC_ID_WMV2:
89 s->h263_msmpeg4 = 1;
90 s->h263_pred = 1;
91 s->msmpeg4_version=5;
92 break;
c6bb50e0 93 case CODEC_ID_VC1:
0d33db8a 94 case CODEC_ID_WMV3:
95 s->h263_msmpeg4 = 1;
96 s->h263_pred = 1;
97 s->msmpeg4_version=6;
98 break;
de6d9b64 99 case CODEC_ID_H263I:
de6d9b64 100 break;
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GM
101 case CODEC_ID_FLV1:
102 s->h263_flv = 1;
103 break;
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FB
104 default:
105 return -1;
106 }
d7e9533a 107 s->codec_id= avctx->codec->id;
93a21abd 108
de6d9b64 109 /* for h263, we allocate the images after having read the header */
488fa19a 110 if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
4949028f
J
111 if (MPV_common_init(s) < 0)
112 return -1;
de6d9b64 113
15025553 114 if (ENABLE_MSMPEG4_DECODER && s->h263_msmpeg4)
8f8402e4 115 ff_msmpeg4_decode_init(s);
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116 else
117 h263_decode_init_vlc(s);
115329f1 118
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119 return 0;
120}
121
1457ab52 122int ff_h263_decode_end(AVCodecContext *avctx)
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123{
124 MpegEncContext *s = avctx->priv_data;
125
126 MPV_common_end(s);
127 return 0;
128}
129
7866eeff 130/**
bb628dae 131 * returns the number of bytes consumed for building the current frame
7866eeff
MN
132 */
133static int get_consumed_bytes(MpegEncContext *s, int buf_size){
134 int pos= (get_bits_count(&s->gb)+7)>>3;
115329f1 135
d5a21172 136 if(s->divx_packed){
7866eeff 137 //we would have to scan through the whole buf to handle the weird reordering ...
115329f1 138 return buf_size;
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MN
139 }else if(s->flags&CODEC_FLAG_TRUNCATED){
140 pos -= s->parse_context.last_index;
141 if(pos<0) pos=0; // padding is not really read so this might be -1
142 return pos;
7866eeff 143 }else{
755bfeab 144 if(pos==0) pos=1; //avoid infinite loops (i doubt that is needed but ...)
77277835 145 if(pos+10>buf_size) pos=buf_size; // oops ;)
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146
147 return pos;
148 }
149}
150
4d2858de 151static int decode_slice(MpegEncContext *s){
46b4feec 152 const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
af2a9e8f 153 const int mb_size= 16>>s->avctx->lowres;
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154 s->last_resync_gb= s->gb;
155 s->first_slice_line= 1;
115329f1 156
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157 s->resync_mb_x= s->mb_x;
158 s->resync_mb_y= s->mb_y;
159
554daa24 160 ff_set_qscale(s, s->qscale);
115329f1 161
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MN
162 if(s->partitioned_frame){
163 const int qscale= s->qscale;
164
165 if(s->codec_id==CODEC_ID_MPEG4){
166 if(ff_mpeg4_decode_partitions(s) < 0)
115329f1 167 return -1;
4d2858de 168 }
115329f1 169
d99ce8d7 170 /* restore variables which were modified */
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171 s->first_slice_line=1;
172 s->mb_x= s->resync_mb_x;
173 s->mb_y= s->resync_mb_y;
554daa24 174 ff_set_qscale(s, qscale);
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MN
175 }
176
177 for(; s->mb_y < s->mb_height; s->mb_y++) {
178 /* per-row end of slice checks */
179 if(s->msmpeg4_version){
180 if(s->resync_mb_y + s->slice_height == s->mb_y){
46b4feec
MN
181 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);
182
4d2858de
MN
183 return 0;
184 }
185 }
115329f1 186
4d2858de
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187 if(s->msmpeg4_version==1){
188 s->last_dc[0]=
189 s->last_dc[1]=
190 s->last_dc[2]= 128;
191 }
115329f1 192
4d2858de
MN
193 ff_init_block_index(s);
194 for(; s->mb_x < s->mb_width; s->mb_x++) {
195 int ret;
196
197 ff_update_block_index(s);
198
199 if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
115329f1 200 s->first_slice_line=0;
4d2858de
MN
201 }
202
203 /* DCT & quantize */
115329f1 204
4d2858de
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205 s->mv_dir = MV_DIR_FORWARD;
206 s->mv_type = MV_TYPE_16X16;
160d679c 207// s->mb_skipped = 0;
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208//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
209 ret= s->decode_mb(s, s->block);
4d2858de 210
7d1c3fc1
MN
211 if (s->pict_type!=B_TYPE)
212 ff_h263_update_motion_val(s);
213
4d2858de 214 if(ret<0){
7bc9090a 215 const int xy= s->mb_x + s->mb_y*s->mb_stride;
4d2858de 216 if(ret==SLICE_END){
aef95c8c 217 MPV_decode_mb(s, s->block);
332f9ac4
MN
218 if(s->loop_filter)
219 ff_h263_loop_filter(s);
aef95c8c 220
35aa136a 221//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));
46b4feec 222 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);
a61f8265
MN
223
224 s->padding_bug_score--;
115329f1 225
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MN
226 if(++s->mb_x >= s->mb_width){
227 s->mb_x=0;
af2a9e8f 228 ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
4d2858de
MN
229 s->mb_y++;
230 }
115329f1 231 return 0;
4d2858de 232 }else if(ret==SLICE_NOEND){
9b879566 233 av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
46b4feec 234 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);
4d2858de
MN
235 return -1;
236 }
9b879566 237 av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
46b4feec 238 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);
115329f1 239
4d2858de
MN
240 return -1;
241 }
aef95c8c
MN
242
243 MPV_decode_mb(s, s->block);
332f9ac4
MN
244 if(s->loop_filter)
245 ff_h263_loop_filter(s);
4d2858de 246 }
115329f1 247
af2a9e8f 248 ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
115329f1 249
4d2858de
MN
250 s->mb_x= 0;
251 }
115329f1 252
4d2858de
MN
253 assert(s->mb_x==0 && s->mb_y==s->mb_height);
254
a61f8265
MN
255 /* try to detect the padding bug */
256 if( s->codec_id==CODEC_ID_MPEG4
115329f1 257 && (s->workaround_bugs&FF_BUG_AUTODETECT)
68f593b4
MN
258 && s->gb.size_in_bits - get_bits_count(&s->gb) >=0
259 && s->gb.size_in_bits - get_bits_count(&s->gb) < 48
96d9cb22 260// && !s->resync_marker
a61f8265 261 && !s->data_partitioning){
115329f1 262
a61f8265 263 const int bits_count= get_bits_count(&s->gb);
68f593b4 264 const int bits_left = s->gb.size_in_bits - bits_count;
115329f1 265
650faac6
MN
266 if(bits_left==0){
267 s->padding_bug_score+=16;
8671359b 268 } else if(bits_left != 1){
a61f8265
MN
269 int v= show_bits(&s->gb, 8);
270 v|= 0x7F >> (7-(bits_count&7));
8671359b 271
4940ed6a 272 if(v==0x7F && bits_left<=8)
a61f8265 273 s->padding_bug_score--;
4940ed6a
MN
274 else if(v==0x7F && ((get_bits_count(&s->gb)+8)&8) && bits_left<=16)
275 s->padding_bug_score+= 4;
a61f8265 276 else
115329f1
DB
277 s->padding_bug_score++;
278 }
a61f8265 279 }
115329f1 280
4940ed6a 281 if(s->workaround_bugs&FF_BUG_AUTODETECT){
503a4725 282 if(s->padding_bug_score > -2 && !s->data_partitioning /*&& (s->divx_version || !s->resync_marker)*/)
4940ed6a
MN
283 s->workaround_bugs |= FF_BUG_NO_PADDING;
284 else
285 s->workaround_bugs &= ~FF_BUG_NO_PADDING;
286 }
a61f8265 287
bb628dae 288 // handle formats which don't have unique end markers
cb7c98d6 289 if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
68f593b4 290 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
4d2858de 291 int max_extra=7;
115329f1 292
4d2858de
MN
293 /* no markers in M$ crap */
294 if(s->msmpeg4_version && s->pict_type==I_TYPE)
295 max_extra+= 17;
115329f1 296
4d2858de 297 /* buggy padding but the frame should still end approximately at the bitstream end */
cb7c98d6 298 if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
4d2858de 299 max_extra+= 48;
cb7c98d6 300 else if((s->workaround_bugs&FF_BUG_NO_PADDING))
4d2858de 301 max_extra+= 256*256*256*64;
115329f1 302
4d2858de 303 if(left>max_extra){
9b879566 304 av_log(s->avctx, AV_LOG_ERROR, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
4d2858de
MN
305 }
306 else if(left<0){
9b879566 307 av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
4d2858de 308 }else
46b4feec 309 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);
115329f1 310
4d2858de
MN
311 return 0;
312 }
a61f8265 313
115329f1 314 av_log(s->avctx, AV_LOG_ERROR, "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
68f593b4 315 s->gb.size_in_bits - get_bits_count(&s->gb),
9b6a5b87 316 show_bits(&s->gb, 24), s->padding_bug_score);
115329f1 317
46b4feec
MN
318 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);
319
4d2858de
MN
320 return -1;
321}
322
115329f1 323int ff_h263_decode_frame(AVCodecContext *avctx,
de6d9b64 324 void *data, int *data_size,
0c1a9eda 325 uint8_t *buf, int buf_size)
de6d9b64
FB
326{
327 MpegEncContext *s = avctx->priv_data;
1df1df0b 328 int ret;
115329f1
DB
329 AVFrame *pict = data;
330
02734c6a
MN
331#ifdef PRINT_FRAME_TIME
332uint64_t time= rdtsc();
333#endif
de6d9b64 334#ifdef DEBUG
9bd0d79f 335 av_log(avctx, AV_LOG_DEBUG, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
bdb4b698
MB
336 if(buf_size>0)
337 av_log(avctx, AV_LOG_DEBUG, "bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
de6d9b64 338#endif
b50eef3a 339 s->flags= avctx->flags;
303e50e6 340 s->flags2= avctx->flags2;
6733417a 341
e9174ba4 342 /* no supplementary picture */
de6d9b64 343 if (buf_size == 0) {
e9174ba4
MN
344 /* special case for last picture */
345 if (s->low_delay==0 && s->next_picture_ptr) {
346 *pict= *(AVFrame*)s->next_picture_ptr;
347 s->next_picture_ptr= NULL;
348
349 *data_size = sizeof(AVFrame);
350 }
351
de6d9b64
FB
352 return 0;
353 }
b7a22d84 354
d7425f59
MN
355 if(s->flags&CODEC_FLAG_TRUNCATED){
356 int next;
115329f1 357
d7425f59 358 if(s->codec_id==CODEC_ID_MPEG4){
e4cb187d 359 next= ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
d07f9043 360 }else if(s->codec_id==CODEC_ID_H263){
c33d9814 361 next= ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
d7425f59 362 }else{
160d679c 363 av_log(s->avctx, AV_LOG_ERROR, "this codec does not support truncated bitstreams\n");
d7425f59
MN
364 return -1;
365 }
115329f1 366
c53d2d90 367 if( ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
d7425f59 368 return buf_size;
d7425f59 369 }
de6d9b64 370
115329f1 371
4a3d7fbc 372retry:
115329f1 373
fb204d4b 374 if(s->bitstream_buffer_size && (s->divx_packed || buf_size<20)){ //divx 5.01+/xvid frame reorder
68f593b4 375 init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8);
51b8fd19 376 }else
68f593b4 377 init_get_bits(&s->gb, buf, buf_size*8);
4136dd24 378 s->bitstream_buffer_size=0;
de6d9b64 379
3a3d3a42 380 if (!s->context_initialized) {
46fd0de8 381 if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
3a3d3a42
MN
382 return -1;
383 }
115329f1 384
755bfeab
DB
385 /* We need to set current_picture_ptr before reading the header,
386 * otherwise we cannot store anyting in there */
5f194811
MN
387 if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
388 int i= ff_find_unused_picture(s, 0);
389 s->current_picture_ptr= &s->picture[i];
390 }
115329f1 391
de6d9b64 392 /* let's go :-) */
15025553 393 if (ENABLE_WMV2_DECODER && s->msmpeg4_version==5) {
1457ab52 394 ret= ff_wmv2_decode_picture_header(s);
15025553 395 } else if (ENABLE_MSMPEG4_DECODER && s->msmpeg4_version) {
de6d9b64
FB
396 ret = msmpeg4_decode_picture_header(s);
397 } else if (s->h263_pred) {
b704e742
MN
398 if(s->avctx->extradata_size && s->picture_number==0){
399 GetBitContext gb;
115329f1 400
68f593b4 401 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
b704e742
MN
402 ret = ff_mpeg4_decode_picture_header(s, &gb);
403 }
404 ret = ff_mpeg4_decode_picture_header(s, &s->gb);
405
9f9c3229
MN
406 if(s->flags& CODEC_FLAG_LOW_DELAY)
407 s->low_delay=1;
d55f7b65 408 } else if (s->codec_id == CODEC_ID_H263I) {
de6d9b64 409 ret = intel_h263_decode_picture_header(s);
d4f5d74a
GM
410 } else if (s->h263_flv) {
411 ret = flv_h263_decode_picture_header(s);
de6d9b64
FB
412 } else {
413 ret = h263_decode_picture_header(s);
488fa19a 414 }
115329f1 415
160d679c 416 if(ret==FRAME_SKIPPED) return get_consumed_bytes(s, buf_size);
ffba1dc0
MN
417
418 /* skip if the header was thrashed */
419 if (ret < 0){
9b879566 420 av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
ffba1dc0
MN
421 return -1;
422 }
115329f1 423
4e00e76b 424 avctx->has_b_frames= !s->low_delay;
115329f1 425
9b6a5b87 426 if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
17662955
BC
427 if(s->stream_codec_tag == ff_get_fourcc("XVID") ||
428 s->codec_tag == ff_get_fourcc("XVID") || s->codec_tag == ff_get_fourcc("XVIX") ||
429 s->codec_tag == ff_get_fourcc("RMP4"))
9b6a5b87 430 s->xvid_build= -1;
541ae140 431#if 0
17662955 432 if(s->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1
115329f1 433 && s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc
8fc6c2b5 434 s->xvid_build= -1;
541ae140
MN
435#endif
436 }
9b6a5b87 437
541ae140 438 if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
17662955 439 if(s->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0)
9b6a5b87
MN
440 s->divx_version= 400; //divx 4
441 }
115329f1 442
45cb4767
MN
443 if(s->xvid_build && s->divx_version){
444 s->divx_version=
445 s->divx_build= 0;
446 }
4d2858de
MN
447
448 if(s->workaround_bugs&FF_BUG_AUTODETECT){
17662955 449 if(s->codec_tag == ff_get_fourcc("XVIX"))
4d2858de 450 s->workaround_bugs|= FF_BUG_XVID_ILACE;
9b6a5b87 451
17662955 452 if(s->codec_tag == ff_get_fourcc("UMP4")){
4d2858de 453 s->workaround_bugs|= FF_BUG_UMP4;
4d2858de 454 }
03e93d35 455
58d1dc0e 456 if(s->divx_version>=500 && s->divx_build<1814){
03e93d35
MN
457 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
458 }
7da71a5c 459
58d1dc0e 460 if(s->divx_version>502 && s->divx_build<1814){
36df8805
MN
461 s->workaround_bugs|= FF_BUG_QPEL_CHROMA2;
462 }
463
a6a494fb
MN
464 if(s->xvid_build && s->xvid_build<=3)
465 s->padding_bug_score= 256*256*256*64;
115329f1 466
7da71a5c
MN
467 if(s->xvid_build && s->xvid_build<=1)
468 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
469
9b6a5b87
MN
470 if(s->xvid_build && s->xvid_build<=12)
471 s->workaround_bugs|= FF_BUG_EDGE;
472
4ccde216
MN
473 if(s->xvid_build && s->xvid_build<=32)
474 s->workaround_bugs|= FF_BUG_DC_CLIP;
475
db794953
MN
476#define SET_QPEL_FUNC(postfix1, postfix2) \
477 s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\
478 s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\
479 s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
480
481 if(s->lavc_build && s->lavc_build<4653)
482 s->workaround_bugs|= FF_BUG_STD_QPEL;
115329f1 483
c40c3482
MN
484 if(s->lavc_build && s->lavc_build<4655)
485 s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
486
8025405f 487 if(s->lavc_build && s->lavc_build<4670){
6674a126
MN
488 s->workaround_bugs|= FF_BUG_EDGE;
489 }
115329f1 490
4ccde216
MN
491 if(s->lavc_build && s->lavc_build<=4712)
492 s->workaround_bugs|= FF_BUG_DC_CLIP;
6674a126 493
c40c3482
MN
494 if(s->divx_version)
495 s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
a61f8265 496//printf("padding_bug_score: %d\n", s->padding_bug_score);
d671e2fe
MN
497 if(s->divx_version==501 && s->divx_build==20020416)
498 s->padding_bug_score= 256*256*256*64;
1c6dcb0f 499
6674a126 500 if(s->divx_version && s->divx_version<500){
1c6dcb0f
MN
501 s->workaround_bugs|= FF_BUG_EDGE;
502 }
115329f1 503
b44bdf7e
MN
504 if(s->divx_version)
505 s->workaround_bugs|= FF_BUG_HPEL_CHROMA;
a61f8265 506#if 0
4d2858de 507 if(s->divx_version==500)
d671e2fe 508 s->padding_bug_score= 256*256*256*64;
4d2858de
MN
509
510 /* very ugly XVID padding bug detection FIXME/XXX solve this differently
511 * lets hope this at least works
512 */
513 if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
514 && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
515 s->workaround_bugs|= FF_BUG_NO_PADDING;
115329f1 516
4d2858de
MN
517 if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok
518 s->workaround_bugs|= FF_BUG_NO_PADDING;
a61f8265 519#endif
4d2858de 520 }
115329f1 521
db794953
MN
522 if(s->workaround_bugs& FF_BUG_STD_QPEL){
523 SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c)
524 SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c)
525 SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c)
526 SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
527 SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
528 SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
529
530 SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c)
531 SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c)
532 SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c)
533 SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
534 SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
535 SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
536 }
4d2858de 537
8fc6c2b5 538 if(avctx->debug & FF_DEBUG_BUGS)
115329f1 539 av_log(s->avctx, AV_LOG_DEBUG, "bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
8fc6c2b5
MN
540 s->workaround_bugs, s->lavc_build, s->xvid_build, s->divx_version, s->divx_build,
541 s->divx_packed ? "p" : "");
115329f1 542
38274ea2
MN
543#if 0 // dump bits per frame / qp / complexity
544{
545 static FILE *f=NULL;
546 if(!f) f=fopen("rate_qp_cplx.txt", "w");
32b90921 547 fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
38274ea2
MN
548}
549#endif
b442a92f 550
ddabdfef 551#if defined(HAVE_MMX) && defined(CONFIG_GPL)
486497e0 552 if(s->codec_id == CODEC_ID_MPEG4 && s->xvid_build && avctx->idct_algo == FF_IDCT_AUTO && (mm_flags & MM_MMX)){
ddabdfef 553 avctx->idct_algo= FF_IDCT_XVIDMMX;
cfeae977 554 avctx->coded_width= 0; // force reinit
6baac1af
MN
555// dsputil_init(&s->dsp, avctx);
556 s->picture_number=0;
ee0c00d3 557 }
b442a92f
AB
558#endif
559
488fa19a 560 /* After H263 & mpeg4 header decode we have the height, width,*/
9eaa4690
J
561 /* and other parameters. So then we could init the picture */
562 /* FIXME: By the way H263 decoder is evolving it should have */
563 /* an H263EncContext */
115329f1
DB
564
565 if ( s->width != avctx->coded_width
21adafec 566 || s->height != avctx->coded_height) {
93a21abd 567 /* H.263 could change picture size any time */
bcc7125e
MN
568 ParseContext pc= s->parse_context; //FIXME move these demuxng hack to avformat
569 s->parse_context.buffer=0;
93a21abd 570 MPV_common_end(s);
bcc7125e 571 s->parse_context= pc;
93a21abd 572 }
488fa19a 573 if (!s->context_initialized) {
21adafec 574 avcodec_set_dimensions(avctx, s->width, s->height);
4d2858de 575
4a3d7fbc 576 goto retry;
de6d9b64 577 }
35aa136a
MN
578
579 if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
580 s->gob_index = ff_h263_get_gob_height(s);
115329f1 581
1e491e29
MN
582 // for hurry_up==5
583 s->current_picture.pict_type= s->pict_type;
584 s->current_picture.key_frame= s->pict_type == I_TYPE;
347ae22e 585
bb628dae 586 /* skip B-frames if we don't have reference frames */
676e61c7 587 if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)) return get_consumed_bytes(s, buf_size);
2417652e 588 /* skip b frames if we are in a hurry */
f8fd15e0 589 if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
8c3eba7c
MN
590 if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
591 || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
115329f1 592 || avctx->skip_frame >= AVDISCARD_ALL)
8c3eba7c 593 return get_consumed_bytes(s, buf_size);
347ae22e 594 /* skip everything if we are in a hurry>=5 */
f8fd15e0 595 if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
115329f1 596
6733417a
MN
597 if(s->next_p_frame_damaged){
598 if(s->pict_type==B_TYPE)
7866eeff 599 return get_consumed_bytes(s, buf_size);
6733417a
MN
600 else
601 s->next_p_frame_damaged=0;
602 }
603
2833fc46
LM
604 if((s->avctx->flags2 & CODEC_FLAG2_FAST) && s->pict_type==B_TYPE){
605 s->me.qpel_put= s->dsp.put_2tap_qpel_pixels_tab;
606 s->me.qpel_avg= s->dsp.avg_2tap_qpel_pixels_tab;
607 }else if((!s->no_rounding) || s->pict_type==B_TYPE){
a1b13cf5 608 s->me.qpel_put= s->dsp.put_qpel_pixels_tab;
2833fc46
LM
609 s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
610 }else{
a1b13cf5 611 s->me.qpel_put= s->dsp.put_no_rnd_qpel_pixels_tab;
2833fc46
LM
612 s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
613 }
614
d6db1c9c
MN
615 if(MPV_frame_start(s, avctx) < 0)
616 return -1;
de6d9b64
FB
617
618#ifdef DEBUG
267f7edc 619 av_log(avctx, AV_LOG_DEBUG, "qscale=%d\n", s->qscale);
de6d9b64
FB
620#endif
621
46b4feec 622 ff_er_frame_start(s);
115329f1 623
487bce53 624 //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type
755bfeab 625 //which is not available before MPV_frame_start()
9abc7e0f
MN
626 if (ENABLE_WMV2_DECODER && s->msmpeg4_version==5){
627 ret = ff_wmv2_decode_secondary_picture_header(s);
628 if(ret<0) return ret;
629 if(ret==1) goto intrax8_decoded;
487bce53
MN
630 }
631
de6d9b64 632 /* decode each macroblock */
115329f1 633 s->mb_x=0;
4d2858de 634 s->mb_y=0;
115329f1 635
4d2858de 636 decode_slice(s);
487bce53 637 while(s->mb_y<s->mb_height){
4d2858de 638 if(s->msmpeg4_version){
b34397b4 639 if(s->slice_height==0 || s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits)
4d2858de
MN
640 break;
641 }else{
642 if(ff_h263_resync(s)<0)
643 break;
6733417a 644 }
115329f1 645
28269849 646 if(s->msmpeg4_version<4 && s->h263_pred)
4d2858de 647 ff_mpeg4_clean_buffers(s);
649c00c9 648
4d2858de 649 decode_slice(s);
de6d9b64 650 }
8b32880c 651
e1a9dbff 652 if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
15025553 653 if(!ENABLE_MSMPEG4_DECODER || msmpeg4_decode_ext_header(s, buf_size) < 0){
1e491e29
MN
654 s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
655 }
115329f1 656
eec1c6b9 657 /* divx 5.01+ bistream reorder stuff */
d5a21172 658 if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_packed){
6733417a 659 int current_pos= get_bits_count(&s->gb)>>3;
fb204d4b 660 int startcode_found=0;
115329f1 661
0ecca7a4 662 if(buf_size - current_pos > 5){
6733417a 663 int i;
7866eeff 664 for(i=current_pos; i<buf_size-3; i++){
6733417a
MN
665 if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
666 startcode_found=1;
667 break;
668 }
669 }
fb204d4b
MN
670 }
671 if(s->gb.buffer == s->bitstream_buffer && buf_size>20){ //xvid style
672 startcode_found=1;
673 current_pos=0;
674 }
675
676 if(startcode_found){
0ecca7a4 677 s->bitstream_buffer= av_fast_realloc(
115329f1
DB
678 s->bitstream_buffer,
679 &s->allocated_bitstream_buffer_size,
0ecca7a4 680 buf_size - current_pos + FF_INPUT_BUFFER_PADDING_SIZE);
fb204d4b
MN
681 memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
682 s->bitstream_buffer_size= buf_size - current_pos;
6733417a
MN
683 }
684 }
685
9abc7e0f 686intrax8_decoded:
46b4feec 687 ff_er_frame_end(s);
4d2858de 688
de6d9b64 689 MPV_frame_end(s);
db794953 690
db6e7795
MN
691assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
692assert(s->current_picture.pict_type == s->pict_type);
5430b070
MN
693 if (s->pict_type == B_TYPE || s->low_delay) {
694 *pict= *(AVFrame*)s->current_picture_ptr;
695 } else if (s->last_picture_ptr != NULL) {
696 *pict= *(AVFrame*)s->last_picture_ptr;
697 }
698
699 if(s->last_picture_ptr || s->low_delay){
700 *data_size = sizeof(AVFrame);
0c9bbaec 701 ff_print_debug_info(s, pict);
6f91bcd1 702 }
8fc69895 703
81401c1f 704 /* Return the Picture timestamp as the frame number */
52b541ad 705 /* we subtract 1 because it is added on utils.c */
81401c1f
J
706 avctx->frame_number = s->picture_number - 1;
707
02734c6a 708#ifdef PRINT_FRAME_TIME
949b1a13 709av_log(avctx, AV_LOG_DEBUG, "%"PRId64"\n", rdtsc()-time);
02734c6a 710#endif
d07f9043 711
7866eeff 712 return get_consumed_bytes(s, buf_size);
de6d9b64
FB
713}
714
bf89e6b1
FB
715AVCodec mpeg4_decoder = {
716 "mpeg4",
de6d9b64 717 CODEC_TYPE_VIDEO,
bf89e6b1 718 CODEC_ID_MPEG4,
de6d9b64 719 sizeof(MpegEncContext),
1457ab52 720 ff_h263_decode_init,
de6d9b64 721 NULL,
1457ab52
MN
722 ff_h263_decode_end,
723 ff_h263_decode_frame,
934982c4 724 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
7a06ff14 725 .flush= ff_mpeg_flush,
de6d9b64
FB
726};
727
728AVCodec h263_decoder = {
729 "h263",
730 CODEC_TYPE_VIDEO,
731 CODEC_ID_H263,
732 sizeof(MpegEncContext),
1457ab52 733 ff_h263_decode_init,
de6d9b64 734 NULL,
1457ab52
MN
735 ff_h263_decode_end,
736 ff_h263_decode_frame,
934982c4 737 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
7a06ff14 738 .flush= ff_mpeg_flush,
de6d9b64
FB
739};
740
84afee34
MN
741AVCodec msmpeg4v1_decoder = {
742 "msmpeg4v1",
743 CODEC_TYPE_VIDEO,
744 CODEC_ID_MSMPEG4V1,
745 sizeof(MpegEncContext),
1457ab52 746 ff_h263_decode_init,
84afee34 747 NULL,
1457ab52
MN
748 ff_h263_decode_end,
749 ff_h263_decode_frame,
93a21abd 750 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
84afee34
MN
751};
752
753AVCodec msmpeg4v2_decoder = {
754 "msmpeg4v2",
755 CODEC_TYPE_VIDEO,
756 CODEC_ID_MSMPEG4V2,
757 sizeof(MpegEncContext),
1457ab52 758 ff_h263_decode_init,
84afee34 759 NULL,
1457ab52
MN
760 ff_h263_decode_end,
761 ff_h263_decode_frame,
93a21abd 762 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
84afee34
MN
763};
764
765AVCodec msmpeg4v3_decoder = {
de6d9b64
FB
766 "msmpeg4",
767 CODEC_TYPE_VIDEO,
84afee34 768 CODEC_ID_MSMPEG4V3,
de6d9b64 769 sizeof(MpegEncContext),
1457ab52 770 ff_h263_decode_init,
de6d9b64 771 NULL,
1457ab52
MN
772 ff_h263_decode_end,
773 ff_h263_decode_frame,
93a21abd 774 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
de6d9b64
FB
775};
776
e1a9dbff
MN
777AVCodec wmv1_decoder = {
778 "wmv1",
779 CODEC_TYPE_VIDEO,
780 CODEC_ID_WMV1,
781 sizeof(MpegEncContext),
1457ab52 782 ff_h263_decode_init,
8f8402e4 783 NULL,
1457ab52
MN
784 ff_h263_decode_end,
785 ff_h263_decode_frame,
93a21abd 786 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
8f8402e4
MN
787};
788
de6d9b64
FB
789AVCodec h263i_decoder = {
790 "h263i",
791 CODEC_TYPE_VIDEO,
792 CODEC_ID_H263I,
793 sizeof(MpegEncContext),
1457ab52 794 ff_h263_decode_init,
de6d9b64 795 NULL,
1457ab52
MN
796 ff_h263_decode_end,
797 ff_h263_decode_frame,
93a21abd 798 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
de6d9b64
FB
799};
800
d4f5d74a
GM
801AVCodec flv_decoder = {
802 "flv",
803 CODEC_TYPE_VIDEO,
804 CODEC_ID_FLV1,
805 sizeof(MpegEncContext),
806 ff_h263_decode_init,
807 NULL,
808 ff_h263_decode_end,
809 ff_h263_decode_frame,
810 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1
811};