lowres width/height cleanup 3rd try
[libav.git] / libavcodec / h263dec.c
CommitLineData
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 *
ff4ec49e
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6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
de6d9b64 10 *
ff4ec49e 11 * This library is distributed in the hope that it will be useful,
de6d9b64 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ff4ec49e
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
de6d9b64 15 *
ff4ec49e
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16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64 19 */
983e3246
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20
21/**
22 * @file h263dec.c
23 * H.263 decoder.
24 */
25
de6d9b64 26#include "avcodec.h"
6000abfa 27#include "dsputil.h"
de6d9b64
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28#include "mpegvideo.h"
29
30//#define DEBUG
02734c6a 31//#define PRINT_FRAME_TIME
de6d9b64 32
1457ab52 33int ff_h263_decode_init(AVCodecContext *avctx)
de6d9b64
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34{
35 MpegEncContext *s = avctx->priv_data;
519c2b6d 36
bf89e6b1 37 s->avctx = avctx;
de6d9b64
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38 s->out_format = FMT_H263;
39
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40 s->width = avctx->coded_width;
41 s->height = avctx->coded_height;
92ba5ffb 42 s->workaround_bugs= avctx->workaround_bugs;
de6d9b64 43
4d2858de 44 // set defaults
3edcacde 45 MPV_decode_defaults(s);
4d2858de 46 s->quant_precision=5;
4d2858de 47 s->decode_mb= ff_h263_decode_mb;
4e00e76b 48 s->low_delay= 1;
5fe061a0 49 avctx->pix_fmt= PIX_FMT_YUV420P;
a573cc27 50 s->unrestricted_mv= 1;
4d2858de 51
de6d9b64
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52 /* select sub codec */
53 switch(avctx->codec->id) {
54 case CODEC_ID_H263:
68b94c35 55 s->unrestricted_mv= 0;
de6d9b64 56 break;
bf89e6b1 57 case CODEC_ID_MPEG4:
fcfee63b 58 s->decode_mb= ff_mpeg4_decode_mb;
de6d9b64
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59 s->time_increment_bits = 4; /* default value for broken headers */
60 s->h263_pred = 1;
4e00e76b 61 s->low_delay = 0; //default, might be overriden in the vol header during header parsing
de6d9b64 62 break;
84afee34 63 case CODEC_ID_MSMPEG4V1:
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64 s->h263_msmpeg4 = 1;
65 s->h263_pred = 1;
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66 s->msmpeg4_version=1;
67 break;
68 case CODEC_ID_MSMPEG4V2:
69 s->h263_msmpeg4 = 1;
70 s->h263_pred = 1;
71 s->msmpeg4_version=2;
72 break;
73 case CODEC_ID_MSMPEG4V3:
74 s->h263_msmpeg4 = 1;
75 s->h263_pred = 1;
76 s->msmpeg4_version=3;
de6d9b64 77 break;
e1a9dbff
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78 case CODEC_ID_WMV1:
79 s->h263_msmpeg4 = 1;
80 s->h263_pred = 1;
81 s->msmpeg4_version=4;
82 break;
8f8402e4
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83 case CODEC_ID_WMV2:
84 s->h263_msmpeg4 = 1;
85 s->h263_pred = 1;
86 s->msmpeg4_version=5;
87 break;
de6d9b64 88 case CODEC_ID_H263I:
de6d9b64 89 break;
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90 case CODEC_ID_FLV1:
91 s->h263_flv = 1;
92 break;
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93 default:
94 return -1;
95 }
d7e9533a 96 s->codec_id= avctx->codec->id;
93a21abd 97
de6d9b64 98 /* for h263, we allocate the images after having read the header */
488fa19a 99 if (avctx->codec->id != CODEC_ID_H263 && avctx->codec->id != CODEC_ID_MPEG4)
4949028f
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100 if (MPV_common_init(s) < 0)
101 return -1;
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102
103 if (s->h263_msmpeg4)
8f8402e4 104 ff_msmpeg4_decode_init(s);
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105 else
106 h263_decode_init_vlc(s);
107
108 return 0;
109}
110
1457ab52 111int ff_h263_decode_end(AVCodecContext *avctx)
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112{
113 MpegEncContext *s = avctx->priv_data;
114
115 MPV_common_end(s);
116 return 0;
117}
118
7866eeff
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119/**
120 * retunrs the number of bytes consumed for building the current frame
121 */
122static int get_consumed_bytes(MpegEncContext *s, int buf_size){
123 int pos= (get_bits_count(&s->gb)+7)>>3;
d7425f59 124
d5a21172 125 if(s->divx_packed){
7866eeff
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126 //we would have to scan through the whole buf to handle the weird reordering ...
127 return buf_size;
d7425f59
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128 }else if(s->flags&CODEC_FLAG_TRUNCATED){
129 pos -= s->parse_context.last_index;
130 if(pos<0) pos=0; // padding is not really read so this might be -1
131 return pos;
7866eeff
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132 }else{
133 if(pos==0) pos=1; //avoid infinite loops (i doubt thats needed but ...)
77277835 134 if(pos+10>buf_size) pos=buf_size; // oops ;)
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135
136 return pos;
137 }
138}
139
4d2858de 140static int decode_slice(MpegEncContext *s){
46b4feec 141 const int part_mask= s->partitioned_frame ? (AC_END|AC_ERROR) : 0x7F;
af2a9e8f 142 const int mb_size= 16>>s->avctx->lowres;
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143 s->last_resync_gb= s->gb;
144 s->first_slice_line= 1;
145
146 s->resync_mb_x= s->mb_x;
147 s->resync_mb_y= s->mb_y;
148
554daa24 149 ff_set_qscale(s, s->qscale);
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150
151 if(s->partitioned_frame){
152 const int qscale= s->qscale;
153
154 if(s->codec_id==CODEC_ID_MPEG4){
155 if(ff_mpeg4_decode_partitions(s) < 0)
156 return -1;
157 }
158
d99ce8d7 159 /* restore variables which were modified */
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160 s->first_slice_line=1;
161 s->mb_x= s->resync_mb_x;
162 s->mb_y= s->resync_mb_y;
554daa24 163 ff_set_qscale(s, qscale);
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164 }
165
166 for(; s->mb_y < s->mb_height; s->mb_y++) {
167 /* per-row end of slice checks */
168 if(s->msmpeg4_version){
169 if(s->resync_mb_y + s->slice_height == s->mb_y){
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170 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);
171
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172 return 0;
173 }
174 }
175
176 if(s->msmpeg4_version==1){
177 s->last_dc[0]=
178 s->last_dc[1]=
179 s->last_dc[2]= 128;
180 }
181
182 ff_init_block_index(s);
183 for(; s->mb_x < s->mb_width; s->mb_x++) {
184 int ret;
185
186 ff_update_block_index(s);
187
188 if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
189 s->first_slice_line=0;
190 }
191
192 /* DCT & quantize */
eb4b3dd3 193 s->dsp.clear_blocks(s->block[0]);
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194
195 s->mv_dir = MV_DIR_FORWARD;
196 s->mv_type = MV_TYPE_16X16;
1e491e29 197// s->mb_skiped = 0;
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198//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
199 ret= s->decode_mb(s, s->block);
4d2858de 200
7d1c3fc1
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201 if (s->pict_type!=B_TYPE)
202 ff_h263_update_motion_val(s);
203
4d2858de 204 if(ret<0){
7bc9090a 205 const int xy= s->mb_x + s->mb_y*s->mb_stride;
4d2858de 206 if(ret==SLICE_END){
aef95c8c 207 MPV_decode_mb(s, s->block);
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208 if(s->loop_filter)
209 ff_h263_loop_filter(s);
aef95c8c 210
35aa136a 211//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 212 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);
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213
214 s->padding_bug_score--;
215
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216 if(++s->mb_x >= s->mb_width){
217 s->mb_x=0;
af2a9e8f 218 ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
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219 s->mb_y++;
220 }
221 return 0;
222 }else if(ret==SLICE_NOEND){
9b879566 223 av_log(s->avctx, AV_LOG_ERROR, "Slice mismatch at MB: %d\n", xy);
46b4feec 224 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);
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225 return -1;
226 }
9b879566 227 av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
46b4feec 228 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);
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229
230 return -1;
231 }
aef95c8c
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232
233 MPV_decode_mb(s, s->block);
332f9ac4
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234 if(s->loop_filter)
235 ff_h263_loop_filter(s);
4d2858de
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236 }
237
af2a9e8f 238 ff_draw_horiz_band(s, s->mb_y*mb_size, mb_size);
4d2858de 239
4d2858de
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240 s->mb_x= 0;
241 }
242
243 assert(s->mb_x==0 && s->mb_y==s->mb_height);
244
a61f8265
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245 /* try to detect the padding bug */
246 if( s->codec_id==CODEC_ID_MPEG4
247 && (s->workaround_bugs&FF_BUG_AUTODETECT)
68f593b4
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248 && s->gb.size_in_bits - get_bits_count(&s->gb) >=0
249 && s->gb.size_in_bits - get_bits_count(&s->gb) < 48
96d9cb22 250// && !s->resync_marker
a61f8265
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251 && !s->data_partitioning){
252
253 const int bits_count= get_bits_count(&s->gb);
68f593b4 254 const int bits_left = s->gb.size_in_bits - bits_count;
a61f8265 255
650faac6
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256 if(bits_left==0){
257 s->padding_bug_score+=16;
258 }else if(bits_left>8){
a61f8265 259 s->padding_bug_score++;
8671359b 260 } else if(bits_left != 1){
a61f8265
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261 int v= show_bits(&s->gb, 8);
262 v|= 0x7F >> (7-(bits_count&7));
8671359b 263
a61f8265
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264 if(v==0x7F)
265 s->padding_bug_score--;
266 else
267 s->padding_bug_score++;
650faac6 268 }
a61f8265
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269 }
270
4d2858de 271 // handle formats which dont have unique end markers
cb7c98d6 272 if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
68f593b4 273 int left= s->gb.size_in_bits - get_bits_count(&s->gb);
4d2858de
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274 int max_extra=7;
275
276 /* no markers in M$ crap */
277 if(s->msmpeg4_version && s->pict_type==I_TYPE)
278 max_extra+= 17;
279
280 /* buggy padding but the frame should still end approximately at the bitstream end */
cb7c98d6 281 if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
4d2858de 282 max_extra+= 48;
cb7c98d6 283 else if((s->workaround_bugs&FF_BUG_NO_PADDING))
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284 max_extra+= 256*256*256*64;
285
286 if(left>max_extra){
9b879566 287 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
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288 }
289 else if(left<0){
9b879566 290 av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
4d2858de 291 }else
46b4feec 292 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);
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293
294 return 0;
295 }
a61f8265 296
9b879566 297 av_log(s->avctx, AV_LOG_ERROR, "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
68f593b4 298 s->gb.size_in_bits - get_bits_count(&s->gb),
9b6a5b87 299 show_bits(&s->gb, 24), s->padding_bug_score);
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300
301 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);
302
4d2858de
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303 return -1;
304}
305
d7425f59
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306/**
307 * finds the end of the current frame in the bitstream.
308 * @return the position of the first byte of the next frame, or -1
309 */
e4cb187d 310int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
d7425f59
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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 }
80097bbf 328
e4cb187d
MN
329 if(vop_found){
330 /* EOF considered as end of frame */
331 if (buf_size == 0)
332 return 0;
333 for(; i<buf_size; i++){
334 state= (state<<8) | buf[i];
335 if((state&0xFFFFFF00) == 0x100){
336 pc->frame_start_found=0;
337 pc->state=-1;
338 return i-3;
339 }
d7425f59
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340 }
341 }
342 pc->frame_start_found= vop_found;
343 pc->state= state;
067ff8b1 344 return END_NOT_FOUND;
d7425f59
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345}
346
e4cb187d 347static int h263_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
d07f9043
MN
348 int vop_found, i;
349 uint32_t state;
350
351 vop_found= pc->frame_start_found;
352 state= pc->state;
353
354 i=0;
355 if(!vop_found){
356 for(i=0; i<buf_size; i++){
357 state= (state<<8) | buf[i];
358 if(state>>(32-22) == 0x20){
359 i++;
360 vop_found=1;
361 break;
362 }
363 }
364 }
365
366 if(vop_found){
367 for(; i<buf_size; i++){
368 state= (state<<8) | buf[i];
369 if(state>>(32-22) == 0x20){
370 pc->frame_start_found=0;
371 pc->state=-1;
372 return i-3;
373 }
374 }
375 }
376 pc->frame_start_found= vop_found;
377 pc->state= state;
378
379 return END_NOT_FOUND;
380}
381
e4cb187d
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382static int h263_parse(AVCodecParserContext *s,
383 AVCodecContext *avctx,
384 uint8_t **poutbuf, int *poutbuf_size,
385 const uint8_t *buf, int buf_size)
386{
387 ParseContext *pc = s->priv_data;
388 int next;
389
390 next= h263_find_frame_end(pc, buf, buf_size);
391
392 if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
393 *poutbuf = NULL;
394 *poutbuf_size = 0;
395 return buf_size;
396 }
397
398 *poutbuf = (uint8_t *)buf;
399 *poutbuf_size = buf_size;
400 return next;
401}
402
1457ab52 403int ff_h263_decode_frame(AVCodecContext *avctx,
de6d9b64 404 void *data, int *data_size,
0c1a9eda 405 uint8_t *buf, int buf_size)
de6d9b64
FB
406{
407 MpegEncContext *s = avctx->priv_data;
1df1df0b 408 int ret;
492cd3a9 409 AVFrame *pict = data;
5d3cea3a 410
02734c6a
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411#ifdef PRINT_FRAME_TIME
412uint64_t time= rdtsc();
413#endif
de6d9b64
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414#ifdef DEBUG
415 printf("*****frame %d size=%d\n", avctx->frame_number, buf_size);
416 printf("bytes=%x %x %x %x\n", buf[0], buf[1], buf[2], buf[3]);
417#endif
b50eef3a 418 s->flags= avctx->flags;
303e50e6 419 s->flags2= avctx->flags2;
6733417a 420
e9174ba4 421 /* no supplementary picture */
de6d9b64 422 if (buf_size == 0) {
e9174ba4
MN
423 /* special case for last picture */
424 if (s->low_delay==0 && s->next_picture_ptr) {
425 *pict= *(AVFrame*)s->next_picture_ptr;
426 s->next_picture_ptr= NULL;
427
428 *data_size = sizeof(AVFrame);
429 }
430
de6d9b64
FB
431 return 0;
432 }
b7a22d84 433
d7425f59
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434 if(s->flags&CODEC_FLAG_TRUNCATED){
435 int next;
d7425f59 436
d7425f59 437 if(s->codec_id==CODEC_ID_MPEG4){
e4cb187d 438 next= ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
d07f9043 439 }else if(s->codec_id==CODEC_ID_H263){
e4cb187d 440 next= h263_find_frame_end(&s->parse_context, buf, buf_size);
d7425f59 441 }else{
9b879566 442 av_log(s->avctx, AV_LOG_ERROR, "this codec doesnt support truncated bitstreams\n");
d7425f59
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443 return -1;
444 }
b7a22d84 445
e4cb187d 446 if( ff_combine_frame(&s->parse_context, next, &buf, &buf_size) < 0 )
d7425f59 447 return buf_size;
d7425f59 448 }
de6d9b64 449
fb204d4b 450
4a3d7fbc
MN
451retry:
452
fb204d4b 453 if(s->bitstream_buffer_size && (s->divx_packed || buf_size<20)){ //divx 5.01+/xvid frame reorder
68f593b4 454 init_get_bits(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size*8);
51b8fd19 455 }else
68f593b4 456 init_get_bits(&s->gb, buf, buf_size*8);
4136dd24 457 s->bitstream_buffer_size=0;
de6d9b64 458
3a3d3a42 459 if (!s->context_initialized) {
46fd0de8 460 if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
3a3d3a42
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461 return -1;
462 }
5f194811
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463
464 //we need to set current_picture_ptr before reading the header, otherwise we cant store anyting im there
465 if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
466 int i= ff_find_unused_picture(s, 0);
467 s->current_picture_ptr= &s->picture[i];
468 }
1457ab52 469
de6d9b64 470 /* let's go :-) */
1457ab52
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471 if (s->msmpeg4_version==5) {
472 ret= ff_wmv2_decode_picture_header(s);
473 } else if (s->msmpeg4_version) {
de6d9b64
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474 ret = msmpeg4_decode_picture_header(s);
475 } else if (s->h263_pred) {
b704e742
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476 if(s->avctx->extradata_size && s->picture_number==0){
477 GetBitContext gb;
478
68f593b4 479 init_get_bits(&gb, s->avctx->extradata, s->avctx->extradata_size*8);
b704e742
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480 ret = ff_mpeg4_decode_picture_header(s, &gb);
481 }
482 ret = ff_mpeg4_decode_picture_header(s, &s->gb);
483
9f9c3229
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484 if(s->flags& CODEC_FLAG_LOW_DELAY)
485 s->low_delay=1;
d55f7b65 486 } else if (s->codec_id == CODEC_ID_H263I) {
de6d9b64 487 ret = intel_h263_decode_picture_header(s);
d4f5d74a
GM
488 } else if (s->h263_flv) {
489 ret = flv_h263_decode_picture_header(s);
de6d9b64
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490 } else {
491 ret = h263_decode_picture_header(s);
488fa19a 492 }
ffba1dc0
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493
494 if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
495
496 /* skip if the header was thrashed */
497 if (ret < 0){
9b879566 498 av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
ffba1dc0
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499 return -1;
500 }
501
4e00e76b 502 avctx->has_b_frames= !s->low_delay;
9b6a5b87
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503
504 if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
541ae140
MN
505 if(s->avctx->stream_codec_tag == ff_get_fourcc("XVID") ||
506 s->avctx->codec_tag == ff_get_fourcc("XVID") || s->avctx->codec_tag == ff_get_fourcc("XVIX"))
9b6a5b87 507 s->xvid_build= -1;
541ae140 508#if 0
8fc6c2b5
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509 if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==1
510 && s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc
511 s->xvid_build= -1;
541ae140
MN
512#endif
513 }
9b6a5b87 514
541ae140 515 if(s->xvid_build==0 && s->divx_version==0 && s->lavc_build==0){
9b6a5b87
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516 if(s->avctx->codec_tag == ff_get_fourcc("DIVX") && s->vo_type==0 && s->vol_control_parameters==0)
517 s->divx_version= 400; //divx 4
518 }
4d2858de
MN
519
520 if(s->workaround_bugs&FF_BUG_AUTODETECT){
9b6a5b87
MN
521 s->workaround_bugs &= ~FF_BUG_NO_PADDING;
522
523 if(s->padding_bug_score > -2 && !s->data_partitioning && (s->divx_version || !s->resync_marker))
cb7c98d6 524 s->workaround_bugs |= FF_BUG_NO_PADDING;
cb7c98d6 525
7004ffb3 526 if(s->avctx->codec_tag == ff_get_fourcc("XVIX"))
4d2858de 527 s->workaround_bugs|= FF_BUG_XVID_ILACE;
9b6a5b87 528
7004ffb3 529 if(s->avctx->codec_tag == ff_get_fourcc("UMP4")){
4d2858de 530 s->workaround_bugs|= FF_BUG_UMP4;
4d2858de 531 }
03e93d35 532
9b6a5b87 533 if(s->divx_version>=500){
03e93d35
MN
534 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
535 }
7da71a5c 536
36df8805
MN
537 if(s->divx_version>502){
538 s->workaround_bugs|= FF_BUG_QPEL_CHROMA2;
539 }
540
a6a494fb
MN
541 if(s->xvid_build && s->xvid_build<=3)
542 s->padding_bug_score= 256*256*256*64;
543
7da71a5c
MN
544 if(s->xvid_build && s->xvid_build<=1)
545 s->workaround_bugs|= FF_BUG_QPEL_CHROMA;
546
9b6a5b87
MN
547 if(s->xvid_build && s->xvid_build<=12)
548 s->workaround_bugs|= FF_BUG_EDGE;
549
4ccde216
MN
550 if(s->xvid_build && s->xvid_build<=32)
551 s->workaround_bugs|= FF_BUG_DC_CLIP;
552
db794953
MN
553#define SET_QPEL_FUNC(postfix1, postfix2) \
554 s->dsp.put_ ## postfix1 = ff_put_ ## postfix2;\
555 s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2;\
556 s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
557
558 if(s->lavc_build && s->lavc_build<4653)
559 s->workaround_bugs|= FF_BUG_STD_QPEL;
560
c40c3482
MN
561 if(s->lavc_build && s->lavc_build<4655)
562 s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
563
8025405f 564 if(s->lavc_build && s->lavc_build<4670){
6674a126
MN
565 s->workaround_bugs|= FF_BUG_EDGE;
566 }
4ccde216
MN
567
568 if(s->lavc_build && s->lavc_build<=4712)
569 s->workaround_bugs|= FF_BUG_DC_CLIP;
6674a126 570
c40c3482
MN
571 if(s->divx_version)
572 s->workaround_bugs|= FF_BUG_DIRECT_BLOCKSIZE;
a61f8265 573//printf("padding_bug_score: %d\n", s->padding_bug_score);
d671e2fe
MN
574 if(s->divx_version==501 && s->divx_build==20020416)
575 s->padding_bug_score= 256*256*256*64;
1c6dcb0f 576
6674a126 577 if(s->divx_version && s->divx_version<500){
1c6dcb0f
MN
578 s->workaround_bugs|= FF_BUG_EDGE;
579 }
7d1c3fc1 580
b44bdf7e
MN
581 if(s->divx_version)
582 s->workaround_bugs|= FF_BUG_HPEL_CHROMA;
a61f8265 583#if 0
4d2858de 584 if(s->divx_version==500)
d671e2fe 585 s->padding_bug_score= 256*256*256*64;
4d2858de
MN
586
587 /* very ugly XVID padding bug detection FIXME/XXX solve this differently
588 * lets hope this at least works
589 */
590 if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
591 && s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
592 s->workaround_bugs|= FF_BUG_NO_PADDING;
593
594 if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok
595 s->workaround_bugs|= FF_BUG_NO_PADDING;
a61f8265 596#endif
4d2858de
MN
597 }
598
db794953
MN
599 if(s->workaround_bugs& FF_BUG_STD_QPEL){
600 SET_QPEL_FUNC(qpel_pixels_tab[0][ 5], qpel16_mc11_old_c)
601 SET_QPEL_FUNC(qpel_pixels_tab[0][ 7], qpel16_mc31_old_c)
602 SET_QPEL_FUNC(qpel_pixels_tab[0][ 9], qpel16_mc12_old_c)
603 SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
604 SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
605 SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
606
607 SET_QPEL_FUNC(qpel_pixels_tab[1][ 5], qpel8_mc11_old_c)
608 SET_QPEL_FUNC(qpel_pixels_tab[1][ 7], qpel8_mc31_old_c)
609 SET_QPEL_FUNC(qpel_pixels_tab[1][ 9], qpel8_mc12_old_c)
610 SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
611 SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
612 SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
613 }
4d2858de 614
8fc6c2b5 615 if(avctx->debug & FF_DEBUG_BUGS)
9b879566 616 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
617 s->workaround_bugs, s->lavc_build, s->xvid_build, s->divx_version, s->divx_build,
618 s->divx_packed ? "p" : "");
619
38274ea2
MN
620#if 0 // dump bits per frame / qp / complexity
621{
622 static FILE *f=NULL;
623 if(!f) f=fopen("rate_qp_cplx.txt", "w");
32b90921 624 fprintf(f, "%d %d %f\n", buf_size, s->qscale, buf_size*(double)s->qscale);
38274ea2
MN
625}
626#endif
b442a92f
AB
627
628#ifdef HAVE_MMX
ee0c00d3
MN
629 if(s->codec_id == CODEC_ID_MPEG4 && s->xvid_build && avctx->idct_algo == FF_IDCT_AUTO && (mm_flags & MM_MMX) && !(s->flags&CODEC_FLAG_BITEXACT)){
630 avctx->idct_algo= FF_IDCT_LIBMPEG2MMX;
631 avctx->width= 0; // force reinit
632 }
b442a92f
AB
633#endif
634
488fa19a 635 /* After H263 & mpeg4 header decode we have the height, width,*/
9eaa4690
J
636 /* and other parameters. So then we could init the picture */
637 /* FIXME: By the way H263 decoder is evolving it should have */
638 /* an H263EncContext */
58b0b0dd 639
21adafec
MN
640 if ( s->width != avctx->coded_width
641 || s->height != avctx->coded_height) {
93a21abd 642 /* H.263 could change picture size any time */
bcc7125e
MN
643 ParseContext pc= s->parse_context; //FIXME move these demuxng hack to avformat
644 s->parse_context.buffer=0;
93a21abd 645 MPV_common_end(s);
bcc7125e 646 s->parse_context= pc;
93a21abd 647 }
488fa19a 648 if (!s->context_initialized) {
21adafec 649 avcodec_set_dimensions(avctx, s->width, s->height);
4d2858de 650
4a3d7fbc 651 goto retry;
de6d9b64 652 }
35aa136a
MN
653
654 if((s->codec_id==CODEC_ID_H263 || s->codec_id==CODEC_ID_H263P))
655 s->gob_index = ff_h263_get_gob_height(s);
347ae22e 656
1e491e29
MN
657 // for hurry_up==5
658 s->current_picture.pict_type= s->pict_type;
659 s->current_picture.key_frame= s->pict_type == I_TYPE;
347ae22e 660
1c2a8c7f 661 /* skip b frames if we dont have reference frames */
676e61c7 662 if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)) return get_consumed_bytes(s, buf_size);
2417652e 663 /* skip b frames if we are in a hurry */
f8fd15e0 664 if(avctx->hurry_up && s->pict_type==B_TYPE) return get_consumed_bytes(s, buf_size);
347ae22e 665 /* skip everything if we are in a hurry>=5 */
f8fd15e0 666 if(avctx->hurry_up>=5) return get_consumed_bytes(s, buf_size);
6733417a
MN
667
668 if(s->next_p_frame_damaged){
669 if(s->pict_type==B_TYPE)
7866eeff 670 return get_consumed_bytes(s, buf_size);
6733417a
MN
671 else
672 s->next_p_frame_damaged=0;
673 }
674
d6db1c9c
MN
675 if(MPV_frame_start(s, avctx) < 0)
676 return -1;
de6d9b64
FB
677
678#ifdef DEBUG
679 printf("qscale=%d\n", s->qscale);
680#endif
681
46b4feec 682 ff_er_frame_start(s);
4d2858de 683
487bce53
MN
684 //the second part of the wmv2 header contains the MB skip bits which are stored in current_picture->mb_type
685 //which isnt available before MPV_frame_start()
686 if (s->msmpeg4_version==5){
687 if(ff_wmv2_decode_secondary_picture_header(s) < 0)
688 return -1;
689 }
690
de6d9b64 691 /* decode each macroblock */
4d2858de
MN
692 s->mb_x=0;
693 s->mb_y=0;
694
695 decode_slice(s);
487bce53 696 while(s->mb_y<s->mb_height){
4d2858de 697 if(s->msmpeg4_version){
487bce53 698 if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0 || get_bits_count(&s->gb) > s->gb.size_in_bits)
4d2858de
MN
699 break;
700 }else{
701 if(ff_h263_resync(s)<0)
702 break;
6733417a
MN
703 }
704
28269849 705 if(s->msmpeg4_version<4 && s->h263_pred)
4d2858de 706 ff_mpeg4_clean_buffers(s);
649c00c9 707
4d2858de 708 decode_slice(s);
de6d9b64 709 }
8b32880c 710
e1a9dbff 711 if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
1e491e29
MN
712 if(msmpeg4_decode_ext_header(s, buf_size) < 0){
713 s->error_status_table[s->mb_num-1]= AC_ERROR|DC_ERROR|MV_ERROR;
714 }
eec1c6b9
MN
715
716 /* divx 5.01+ bistream reorder stuff */
d5a21172 717 if(s->codec_id==CODEC_ID_MPEG4 && s->bitstream_buffer_size==0 && s->divx_packed){
6733417a 718 int current_pos= get_bits_count(&s->gb)>>3;
fb204d4b 719 int startcode_found=0;
6733417a 720
eec1c6b9
MN
721 if( buf_size - current_pos > 5
722 && buf_size - current_pos < BITSTREAM_BUFFER_SIZE){
6733417a 723 int i;
7866eeff 724 for(i=current_pos; i<buf_size-3; i++){
6733417a
MN
725 if(buf[i]==0 && buf[i+1]==0 && buf[i+2]==1 && buf[i+3]==0xB6){
726 startcode_found=1;
727 break;
728 }
729 }
fb204d4b
MN
730 }
731 if(s->gb.buffer == s->bitstream_buffer && buf_size>20){ //xvid style
732 startcode_found=1;
733 current_pos=0;
734 }
735
736 if(startcode_found){
737 memcpy(s->bitstream_buffer, buf + current_pos, buf_size - current_pos);
738 s->bitstream_buffer_size= buf_size - current_pos;
6733417a
MN
739 }
740 }
741
46b4feec 742 ff_er_frame_end(s);
4d2858de 743
de6d9b64 744 MPV_frame_end(s);
db794953 745
db6e7795
MN
746assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
747assert(s->current_picture.pict_type == s->pict_type);
4e00e76b 748 if(s->pict_type==B_TYPE || s->low_delay){
492cd3a9 749 *pict= *(AVFrame*)&s->current_picture;
0c9bbaec 750 ff_print_debug_info(s, pict);
6f91bcd1 751 } else {
492cd3a9 752 *pict= *(AVFrame*)&s->last_picture;
e4a1fdfd
MN
753 if(pict)
754 ff_print_debug_info(s, pict);
6f91bcd1 755 }
8fc69895 756
81401c1f
J
757 /* Return the Picture timestamp as the frame number */
758 /* we substract 1 because it is added on utils.c */
759 avctx->frame_number = s->picture_number - 1;
760
4e00e76b 761 /* dont output the last pic after seeking */
b536d0aa 762 if(s->last_picture_ptr || s->low_delay)
492cd3a9 763 *data_size = sizeof(AVFrame);
02734c6a
MN
764#ifdef PRINT_FRAME_TIME
765printf("%Ld\n", rdtsc()-time);
766#endif
d07f9043 767
7866eeff 768 return get_consumed_bytes(s, buf_size);
de6d9b64
FB
769}
770
a77146ab
ZK
771static const AVOption mpeg4_decoptions[] =
772{
773 AVOPTION_SUB(avoptions_workaround_bug),
774 AVOPTION_END()
775};
776
bf89e6b1
FB
777AVCodec mpeg4_decoder = {
778 "mpeg4",
de6d9b64 779 CODEC_TYPE_VIDEO,
bf89e6b1 780 CODEC_ID_MPEG4,
de6d9b64 781 sizeof(MpegEncContext),
1457ab52 782 ff_h263_decode_init,
de6d9b64 783 NULL,
1457ab52
MN
784 ff_h263_decode_end,
785 ff_h263_decode_frame,
d7425f59 786 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
a77146ab 787 .options = mpeg4_decoptions,
7a06ff14 788 .flush= ff_mpeg_flush,
de6d9b64
FB
789};
790
791AVCodec h263_decoder = {
792 "h263",
793 CODEC_TYPE_VIDEO,
794 CODEC_ID_H263,
795 sizeof(MpegEncContext),
1457ab52 796 ff_h263_decode_init,
de6d9b64 797 NULL,
1457ab52
MN
798 ff_h263_decode_end,
799 ff_h263_decode_frame,
d07f9043 800 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED,
7a06ff14 801 .flush= ff_mpeg_flush,
de6d9b64
FB
802};
803
84afee34
MN
804AVCodec msmpeg4v1_decoder = {
805 "msmpeg4v1",
806 CODEC_TYPE_VIDEO,
807 CODEC_ID_MSMPEG4V1,
808 sizeof(MpegEncContext),
1457ab52 809 ff_h263_decode_init,
84afee34 810 NULL,
1457ab52
MN
811 ff_h263_decode_end,
812 ff_h263_decode_frame,
93a21abd 813 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
a77146ab 814 mpeg4_decoptions,
84afee34
MN
815};
816
817AVCodec msmpeg4v2_decoder = {
818 "msmpeg4v2",
819 CODEC_TYPE_VIDEO,
820 CODEC_ID_MSMPEG4V2,
821 sizeof(MpegEncContext),
1457ab52 822 ff_h263_decode_init,
84afee34 823 NULL,
1457ab52
MN
824 ff_h263_decode_end,
825 ff_h263_decode_frame,
93a21abd 826 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
a77146ab 827 mpeg4_decoptions,
84afee34
MN
828};
829
830AVCodec msmpeg4v3_decoder = {
de6d9b64
FB
831 "msmpeg4",
832 CODEC_TYPE_VIDEO,
84afee34 833 CODEC_ID_MSMPEG4V3,
de6d9b64 834 sizeof(MpegEncContext),
1457ab52 835 ff_h263_decode_init,
de6d9b64 836 NULL,
1457ab52
MN
837 ff_h263_decode_end,
838 ff_h263_decode_frame,
93a21abd 839 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
a77146ab 840 .options = mpeg4_decoptions,
de6d9b64
FB
841};
842
e1a9dbff
MN
843AVCodec wmv1_decoder = {
844 "wmv1",
845 CODEC_TYPE_VIDEO,
846 CODEC_ID_WMV1,
847 sizeof(MpegEncContext),
1457ab52 848 ff_h263_decode_init,
8f8402e4 849 NULL,
1457ab52
MN
850 ff_h263_decode_end,
851 ff_h263_decode_frame,
93a21abd 852 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
a77146ab 853 mpeg4_decoptions,
8f8402e4
MN
854};
855
de6d9b64
FB
856AVCodec h263i_decoder = {
857 "h263i",
858 CODEC_TYPE_VIDEO,
859 CODEC_ID_H263I,
860 sizeof(MpegEncContext),
1457ab52 861 ff_h263_decode_init,
de6d9b64 862 NULL,
1457ab52
MN
863 ff_h263_decode_end,
864 ff_h263_decode_frame,
93a21abd 865 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1,
a77146ab 866 mpeg4_decoptions,
de6d9b64
FB
867};
868
d4f5d74a
GM
869AVCodec flv_decoder = {
870 "flv",
871 CODEC_TYPE_VIDEO,
872 CODEC_ID_FLV1,
873 sizeof(MpegEncContext),
874 ff_h263_decode_init,
875 NULL,
876 ff_h263_decode_end,
877 ff_h263_decode_frame,
878 CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1
879};
e4cb187d
MN
880
881AVCodecParser h263_parser = {
882 { CODEC_ID_H263 },
883 sizeof(ParseContext),
884 NULL,
885 h263_parse,
886 ff_parse_close,
887};