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h263dec.c
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1 /*
2  * H.263 decoder
3  * Copyright (c) 2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * H.263 decoder.
26  */
27 
28 #define UNCHECKED_BITSTREAM_READER 1
29 
30 #include "libavutil/cpu.h"
31 #include "avcodec.h"
32 #include "error_resilience.h"
33 #include "flv.h"
34 #include "h263.h"
35 #include "h263_parser.h"
36 #include "hwaccel.h"
37 #include "internal.h"
38 #include "mpeg_er.h"
39 #include "mpeg4video.h"
40 #include "mpeg4video_parser.h"
41 #include "mpegutils.h"
42 #include "mpegvideo.h"
43 #include "msmpeg4.h"
44 #include "qpeldsp.h"
45 #include "thread.h"
46 #include "wmv2.h"
47 
49 {
50  /* MPEG-4 Studio Profile only, not supported by hardware */
51  if (avctx->bits_per_raw_sample > 8) {
52  av_assert1(((MpegEncContext *)avctx->priv_data)->studio_profile);
53  return avctx->pix_fmt;
54  }
55 
56  if (avctx->codec->id == AV_CODEC_ID_MSS2)
57  return AV_PIX_FMT_YUV420P;
58 
59  if (CONFIG_GRAY && (avctx->flags & AV_CODEC_FLAG_GRAY)) {
62  return AV_PIX_FMT_GRAY8;
63  }
64 
65  return avctx->pix_fmt = ff_get_format(avctx, avctx->codec->pix_fmts);
66 }
67 
69 {
70  MpegEncContext *s = avctx->priv_data;
71  int ret;
72 
73  s->out_format = FMT_H263;
74 
75  // set defaults
77  ff_mpv_decode_init(s, avctx);
78 
79  s->quant_precision = 5;
81  s->low_delay = 1;
82  s->unrestricted_mv = 1;
83 
84  /* select sub codec */
85  switch (avctx->codec->id) {
86  case AV_CODEC_ID_H263:
87  case AV_CODEC_ID_H263P:
88  s->unrestricted_mv = 0;
90  break;
91  case AV_CODEC_ID_MPEG4:
92  break;
94  s->h263_pred = 1;
95  s->msmpeg4_version = 1;
96  break;
98  s->h263_pred = 1;
99  s->msmpeg4_version = 2;
100  break;
102  s->h263_pred = 1;
103  s->msmpeg4_version = 3;
104  break;
105  case AV_CODEC_ID_WMV1:
106  s->h263_pred = 1;
107  s->msmpeg4_version = 4;
108  break;
109  case AV_CODEC_ID_WMV2:
110  s->h263_pred = 1;
111  s->msmpeg4_version = 5;
112  break;
113  case AV_CODEC_ID_VC1:
114  case AV_CODEC_ID_WMV3:
117  case AV_CODEC_ID_MSS2:
118  s->h263_pred = 1;
119  s->msmpeg4_version = 6;
121  break;
122  case AV_CODEC_ID_H263I:
123  break;
124  case AV_CODEC_ID_FLV1:
125  s->h263_flv = 1;
126  break;
127  default:
128  av_log(avctx, AV_LOG_ERROR, "Unsupported codec %d\n",
129  avctx->codec->id);
130  return AVERROR(ENOSYS);
131  }
132  s->codec_id = avctx->codec->id;
133 
134  if (avctx->codec_tag == AV_RL32("L263") || avctx->codec_tag == AV_RL32("S263"))
135  if (avctx->extradata_size == 56 && avctx->extradata[0] == 1)
136  s->ehc_mode = 1;
137 
138  /* for H.263, we allocate the images after having read the header */
139  if (avctx->codec->id != AV_CODEC_ID_H263 &&
140  avctx->codec->id != AV_CODEC_ID_H263P &&
141  avctx->codec->id != AV_CODEC_ID_MPEG4) {
142  avctx->pix_fmt = h263_get_format(avctx);
143  ff_mpv_idct_init(s);
144  if ((ret = ff_mpv_common_init(s)) < 0)
145  return ret;
146  }
147 
149  ff_qpeldsp_init(&s->qdsp);
151 
152  return 0;
153 }
154 
156 {
157  MpegEncContext *s = avctx->priv_data;
158 
160  return 0;
161 }
162 
163 /**
164  * Return the number of bytes consumed for building the current frame.
165  */
166 static int get_consumed_bytes(MpegEncContext *s, int buf_size)
167 {
168  int pos = (get_bits_count(&s->gb) + 7) >> 3;
169 
170  if (s->divx_packed || s->avctx->hwaccel) {
171  /* We would have to scan through the whole buf to handle the weird
172  * reordering ... */
173  return buf_size;
174  } else if (s->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
175  pos -= s->parse_context.last_index;
176  // padding is not really read so this might be -1
177  if (pos < 0)
178  pos = 0;
179  return pos;
180  } else {
181  // avoid infinite loops (maybe not needed...)
182  if (pos == 0)
183  pos = 1;
184  // oops ;)
185  if (pos + 10 > buf_size)
186  pos = buf_size;
187 
188  return pos;
189  }
190 }
191 
193 {
194  const int part_mask = s->partitioned_frame
195  ? (ER_AC_END | ER_AC_ERROR) : 0x7F;
196  const int mb_size = 16 >> s->avctx->lowres;
197  int ret;
198 
199  s->last_resync_gb = s->gb;
200  s->first_slice_line = 1;
201  s->resync_mb_x = s->mb_x;
202  s->resync_mb_y = s->mb_y;
203 
204  ff_set_qscale(s, s->qscale);
205 
206  if (s->studio_profile) {
208  return ret;
209  }
210 
211  if (s->avctx->hwaccel) {
212  const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
213  ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);
214  // ensure we exit decode loop
215  s->mb_y = s->mb_height;
216  return ret;
217  }
218 
219  if (s->partitioned_frame) {
220  const int qscale = s->qscale;
221 
222  if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
223  if ((ret = ff_mpeg4_decode_partitions(s->avctx->priv_data)) < 0)
224  return ret;
225 
226  /* restore variables which were modified */
227  s->first_slice_line = 1;
228  s->mb_x = s->resync_mb_x;
229  s->mb_y = s->resync_mb_y;
230  ff_set_qscale(s, qscale);
231  }
232 
233  for (; s->mb_y < s->mb_height; s->mb_y++) {
234  /* per-row end of slice checks */
235  if (s->msmpeg4_version) {
236  if (s->resync_mb_y + s->slice_height == s->mb_y) {
238  s->mb_x - 1, s->mb_y, ER_MB_END);
239 
240  return 0;
241  }
242  }
243 
244  if (s->msmpeg4_version == 1) {
245  s->last_dc[0] =
246  s->last_dc[1] =
247  s->last_dc[2] = 128;
248  }
249 
251  for (; s->mb_x < s->mb_width; s->mb_x++) {
252  int ret;
253 
255 
256  if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
257  s->first_slice_line = 0;
258 
259  /* DCT & quantize */
260 
261  s->mv_dir = MV_DIR_FORWARD;
262  s->mv_type = MV_TYPE_16X16;
263  ff_dlog(s, "%d %06X\n",
264  get_bits_count(&s->gb), show_bits(&s->gb, 24));
265 
266  ff_tlog(NULL, "Decoding MB at %dx%d\n", s->mb_x, s->mb_y);
267  ret = s->decode_mb(s, s->block);
268 
269  if (s->pict_type != AV_PICTURE_TYPE_B)
271 
272  if (ret < 0) {
273  const int xy = s->mb_x + s->mb_y * s->mb_stride;
274  if (ret == SLICE_END) {
276  if (s->loop_filter)
278 
280  s->mb_x, s->mb_y, ER_MB_END & part_mask);
281 
282  s->padding_bug_score--;
283 
284  if (++s->mb_x >= s->mb_width) {
285  s->mb_x = 0;
286  ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
288  s->mb_y++;
289  }
290  return 0;
291  } else if (ret == SLICE_NOEND) {
293  "Slice mismatch at MB: %d\n", xy);
295  s->mb_x + 1, s->mb_y,
296  ER_MB_END & part_mask);
297  return AVERROR_INVALIDDATA;
298  }
299  av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
301  s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);
302 
304  continue;
305  return AVERROR_INVALIDDATA;
306  }
307 
309  if (s->loop_filter)
311  }
312 
313  ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
315 
316  s->mb_x = 0;
317  }
318 
319  av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);
320 
321  // Detect incorrect padding with wrong stuffing codes used by NEC N-02B
322  if (s->codec_id == AV_CODEC_ID_MPEG4 &&
324  get_bits_left(&s->gb) >= 48 &&
325  show_bits(&s->gb, 24) == 0x4010 &&
326  !s->data_partitioning)
327  s->padding_bug_score += 32;
328 
329  /* try to detect the padding bug */
330  if (s->codec_id == AV_CODEC_ID_MPEG4 &&
332  get_bits_left(&s->gb) >= 0 &&
333  get_bits_left(&s->gb) < 137 &&
334  !s->data_partitioning) {
335  const int bits_count = get_bits_count(&s->gb);
336  const int bits_left = s->gb.size_in_bits - bits_count;
337 
338  if (bits_left == 0) {
339  s->padding_bug_score += 16;
340  } else if (bits_left != 1) {
341  int v = show_bits(&s->gb, 8);
342  v |= 0x7F >> (7 - (bits_count & 7));
343 
344  if (v == 0x7F && bits_left <= 8)
345  s->padding_bug_score--;
346  else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
347  bits_left <= 16)
348  s->padding_bug_score += 4;
349  else
350  s->padding_bug_score++;
351  }
352  }
353 
354  if (s->codec_id == AV_CODEC_ID_H263 &&
356  get_bits_left(&s->gb) >= 8 &&
357  get_bits_left(&s->gb) < 300 &&
359  show_bits(&s->gb, 8) == 0 &&
360  !s->data_partitioning) {
361 
362  s->padding_bug_score += 32;
363  }
364 
365  if (s->codec_id == AV_CODEC_ID_H263 &&
367  get_bits_left(&s->gb) >= 64 &&
368  AV_RB64(s->gb.buffer_end - 8) == 0xCDCDCDCDFC7F0000) {
369 
370  s->padding_bug_score += 32;
371  }
372 
374  if (
375  (s->padding_bug_score > -2 && !s->data_partitioning))
377  else
379  }
380 
381  // handle formats which don't have unique end markers
382  if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly
383  int left = get_bits_left(&s->gb);
384  int max_extra = 7;
385 
386  /* no markers in M$ crap */
388  max_extra += 17;
389 
390  /* buggy padding but the frame should still end approximately at
391  * the bitstream end */
392  if ((s->workaround_bugs & FF_BUG_NO_PADDING) &&
394  max_extra += 48;
395  else if ((s->workaround_bugs & FF_BUG_NO_PADDING))
396  max_extra += 256 * 256 * 256 * 64;
397 
398  if (left > max_extra)
400  "discarding %d junk bits at end, next would be %X\n",
401  left, show_bits(&s->gb, 24));
402  else if (left < 0)
403  av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
404  else
406  s->mb_x - 1, s->mb_y, ER_MB_END);
407 
408  return 0;
409  }
410 
412  "slice end not reached but screenspace end (%d left %06X, score= %d)\n",
413  get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score);
414 
415  ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
416  ER_MB_END & part_mask);
417 
418  return AVERROR_INVALIDDATA;
419 }
420 
421 int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
422  AVPacket *avpkt)
423 {
424  const uint8_t *buf = avpkt->data;
425  int buf_size = avpkt->size;
426  MpegEncContext *s = avctx->priv_data;
427  int ret;
428  int slice_ret = 0;
429  AVFrame *pict = data;
430 
431  /* no supplementary picture */
432  if (buf_size == 0) {
433  /* special case for last picture */
434  if (s->low_delay == 0 && s->next_picture_ptr) {
435  if ((ret = av_frame_ref(pict, s->next_picture_ptr->f)) < 0)
436  return ret;
437  s->next_picture_ptr = NULL;
438 
439  *got_frame = 1;
440  }
441 
442  return 0;
443  }
444 
445  if (s->avctx->flags & AV_CODEC_FLAG_TRUNCATED) {
446  int next;
447 
448  if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) {
449  next = ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
450  } else if (CONFIG_H263_DECODER && s->codec_id == AV_CODEC_ID_H263) {
451  next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
452  } else if (CONFIG_H263P_DECODER && s->codec_id == AV_CODEC_ID_H263P) {
453  next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
454  } else {
456  "this codec does not support truncated bitstreams\n");
457  return AVERROR(ENOSYS);
458  }
459 
460  if (ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf,
461  &buf_size) < 0)
462  return buf_size;
463  }
464 
465 retry:
466  if (s->divx_packed && s->bitstream_buffer_size) {
467  int i;
468  for(i=0; i < buf_size-3; i++) {
469  if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) {
470  if (buf[i+3]==0xB0) {
471  av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
472  s->bitstream_buffer_size = 0;
473  }
474  break;
475  }
476  }
477  }
478 
479  if (s->bitstream_buffer_size && (s->divx_packed || buf_size <= MAX_NVOP_SIZE)) // divx 5.01+/xvid frame reorder
480  ret = init_get_bits8(&s->gb, s->bitstream_buffer,
482  else
483  ret = init_get_bits8(&s->gb, buf, buf_size);
484 
485  s->bitstream_buffer_size = 0;
486  if (ret < 0)
487  return ret;
488 
489  if (!s->context_initialized)
490  // we need the idct permutation for reading a custom matrix
491  ff_mpv_idct_init(s);
492 
493  /* let's go :-) */
494  if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
496  } else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
498  } else if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
499  if (s->avctx->extradata_size && s->picture_number == 0) {
500  GetBitContext gb;
501 
502  if (init_get_bits8(&gb, s->avctx->extradata, s->avctx->extradata_size) >= 0 )
504  }
505  ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb);
506  } else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) {
508  } else if (CONFIG_FLV_DECODER && s->h263_flv) {
510  } else {
512  }
513 
514  if (ret < 0 || ret == FRAME_SKIPPED) {
515  if ( s->width != avctx->coded_width
516  || s->height != avctx->coded_height) {
517  av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n");
518  s->width = avctx->coded_width;
519  s->height= avctx->coded_height;
520  }
521  }
522  if (ret == FRAME_SKIPPED)
523  return get_consumed_bytes(s, buf_size);
524 
525  /* skip if the header was thrashed */
526  if (ret < 0) {
527  av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
528  return ret;
529  }
530 
531  if (!s->context_initialized) {
532  avctx->pix_fmt = h263_get_format(avctx);
533  if ((ret = ff_mpv_common_init(s)) < 0)
534  return ret;
535  }
536 
537  if (!s->current_picture_ptr || s->current_picture_ptr->f->data[0]) {
538  int i = ff_find_unused_picture(s->avctx, s->picture, 0);
539  if (i < 0)
540  return i;
541  s->current_picture_ptr = &s->picture[i];
542  }
543 
544  avctx->has_b_frames = !s->low_delay;
545 
546  if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4) {
547  if (ff_mpeg4_workaround_bugs(avctx) == 1)
548  goto retry;
549  if (s->studio_profile != (s->idsp.idct == NULL))
550  ff_mpv_idct_init(s);
551  }
552 
553  /* After H.263 & MPEG-4 header decode we have the height, width,
554  * and other parameters. So then we could init the picture.
555  * FIXME: By the way H.263 decoder is evolving it should have
556  * an H263EncContext */
557  if (s->width != avctx->coded_width ||
558  s->height != avctx->coded_height ||
559  s->context_reinit) {
560  /* H.263 could change picture size any time */
561  s->context_reinit = 0;
562 
563  ret = ff_set_dimensions(avctx, s->width, s->height);
564  if (ret < 0)
565  return ret;
566 
567  ff_set_sar(avctx, avctx->sample_aspect_ratio);
568 
569  if ((ret = ff_mpv_common_frame_size_change(s)))
570  return ret;
571 
572  if (avctx->pix_fmt != h263_get_format(avctx)) {
573  av_log(avctx, AV_LOG_ERROR, "format change not supported\n");
574  avctx->pix_fmt = AV_PIX_FMT_NONE;
575  return AVERROR_UNKNOWN;
576  }
577  }
578 
579  if (s->codec_id == AV_CODEC_ID_H263 ||
580  s->codec_id == AV_CODEC_ID_H263P ||
583 
584  // for skipping the frame
587 
588  /* skip B-frames if we don't have reference frames */
589  if (!s->last_picture_ptr &&
590  (s->pict_type == AV_PICTURE_TYPE_B || s->droppable))
591  return get_consumed_bytes(s, buf_size);
592  if ((avctx->skip_frame >= AVDISCARD_NONREF &&
593  s->pict_type == AV_PICTURE_TYPE_B) ||
594  (avctx->skip_frame >= AVDISCARD_NONKEY &&
595  s->pict_type != AV_PICTURE_TYPE_I) ||
596  avctx->skip_frame >= AVDISCARD_ALL)
597  return get_consumed_bytes(s, buf_size);
598 
599  if (s->next_p_frame_damaged) {
600  if (s->pict_type == AV_PICTURE_TYPE_B)
601  return get_consumed_bytes(s, buf_size);
602  else
603  s->next_p_frame_damaged = 0;
604  }
605 
606  if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
609  } else {
612  }
613 
614  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
615  return ret;
616 
617  if (!s->divx_packed)
618  ff_thread_finish_setup(avctx);
619 
620  if (avctx->hwaccel) {
621  ret = avctx->hwaccel->start_frame(avctx, s->gb.buffer,
622  s->gb.buffer_end - s->gb.buffer);
623  if (ret < 0 )
624  return ret;
625  }
626 
628 
629  /* the second part of the wmv2 header contains the MB skip bits which
630  * are stored in current_picture->mb_type which is not available before
631  * ff_mpv_frame_start() */
632  if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
634  if (ret < 0)
635  return ret;
636  if (ret == 1)
637  goto frame_end;
638  }
639 
640  /* decode each macroblock */
641  s->mb_x = 0;
642  s->mb_y = 0;
643 
644  slice_ret = decode_slice(s);
645  while (s->mb_y < s->mb_height) {
646  if (s->msmpeg4_version) {
647  if (s->slice_height == 0 || s->mb_x != 0 || slice_ret < 0 ||
648  (s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0)
649  break;
650  } else {
651  int prev_x = s->mb_x, prev_y = s->mb_y;
652  if (ff_h263_resync(s) < 0)
653  break;
654  if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x)
655  s->er.error_occurred = 1;
656  }
657 
658  if (s->msmpeg4_version < 4 && s->h263_pred)
660 
661  if (decode_slice(s) < 0)
662  slice_ret = AVERROR_INVALIDDATA;
663  }
664 
665  if (s->msmpeg4_version && s->msmpeg4_version < 4 &&
667  if (!CONFIG_MSMPEG4_DECODER ||
668  ff_msmpeg4_decode_ext_header(s, buf_size) < 0)
670 
672 frame_end:
673  if (!s->studio_profile)
674  ff_er_frame_end(&s->er);
675 
676  if (avctx->hwaccel) {
677  ret = avctx->hwaccel->end_frame(avctx);
678  if (ret < 0)
679  return ret;
680  }
681 
682  ff_mpv_frame_end(s);
683 
684  if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
685  ff_mpeg4_frame_end(avctx, buf, buf_size);
686 
687  if (!s->divx_packed && avctx->hwaccel)
688  ff_thread_finish_setup(avctx);
689 
692  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
693  if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
694  return ret;
697  } else if (s->last_picture_ptr) {
698  if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
699  return ret;
702  }
703 
704  if (s->last_picture_ptr || s->low_delay) {
705  if ( pict->format == AV_PIX_FMT_YUV420P
706  && (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) {
707  int x, y, p;
709  for (p=0; p<3; p++) {
710  int w = AV_CEIL_RSHIFT(pict-> width, !!p);
711  int h = AV_CEIL_RSHIFT(pict->height, !!p);
712  int linesize = pict->linesize[p];
713  for (y=0; y<(h>>1); y++)
714  for (x=0; x<w; x++)
715  FFSWAP(int,
716  pict->data[p][x + y*linesize],
717  pict->data[p][x + (h-1-y)*linesize]);
718  }
719  }
720  *got_frame = 1;
721  }
722 
723  if (slice_ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE))
724  return slice_ret;
725  else
726  return get_consumed_bytes(s, buf_size);
727 }
728 
730 #if CONFIG_H263_VAAPI_HWACCEL || CONFIG_MPEG4_VAAPI_HWACCEL
732 #endif
733 #if CONFIG_MPEG4_NVDEC_HWACCEL
735 #endif
736 #if CONFIG_MPEG4_VDPAU_HWACCEL
738 #endif
739 #if CONFIG_H263_VIDEOTOOLBOX_HWACCEL || CONFIG_MPEG4_VIDEOTOOLBOX_HWACCEL
741 #endif
744 };
745 
747  .name = "h263",
748  .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
749  .type = AVMEDIA_TYPE_VIDEO,
750  .id = AV_CODEC_ID_H263,
751  .priv_data_size = sizeof(MpegEncContext),
753  .close = ff_h263_decode_end,
757  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
758  .flush = ff_mpeg_flush,
759  .max_lowres = 3,
761 };
762 
764  .name = "h263p",
765  .long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
766  .type = AVMEDIA_TYPE_VIDEO,
767  .id = AV_CODEC_ID_H263P,
768  .priv_data_size = sizeof(MpegEncContext),
770  .close = ff_h263_decode_end,
774  .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
775  .flush = ff_mpeg_flush,
776  .max_lowres = 3,
778  .hw_configs = (const AVCodecHWConfigInternal*[]) {
779 #if CONFIG_H263_VAAPI_HWACCEL
780  HWACCEL_VAAPI(h263),
781 #endif
782 #if CONFIG_MPEG4_VDPAU_HWACCEL
783  HWACCEL_VDPAU(mpeg4),
784 #endif
785 #if CONFIG_H263_VIDEOTOOLBOX_HWACCEL
786  HWACCEL_VIDEOTOOLBOX(h263),
787 #endif
788  NULL
789  },
790 };
int bitstream_buffer_size
Definition: mpegvideo.h:416
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
Definition: avcodec.h:2660
#define ff_tlog(ctx,...)
Definition: internal.h:75
IDCTDSPContext idsp
Definition: mpegvideo.h:230
#define NULL
Definition: coverity.c:32
int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
Select the (possibly hardware accelerated) pixel format.
Definition: decode.c:1334
const struct AVCodec * codec
Definition: avcodec.h:1529
discard all frames except keyframes
Definition: avcodec.h:795
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:2233
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3640
qpel_mc_func avg_qpel_pixels_tab[2][16]
Definition: qpeldsp.h:74
int picture_number
Definition: mpegvideo.h:127
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:528
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static void flush(AVCodecContext *avctx)
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1707
#define SLICE_NOEND
no end marker or error found but mb count exceeded
Definition: mpegvideo.h:516
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
qpel_mc_func put_no_rnd_qpel_pixels_tab[2][16]
Definition: qpeldsp.h:75
#define ER_MB_END
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:104
hardware decoding through Videotoolbox
Definition: pixfmt.h:282
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static int decode_slice(MpegEncContext *s)
Definition: h263dec.c:192
void ff_er_frame_end(ERContext *s)
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2150
int msmpeg4_version
0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
Definition: mpegvideo.h:438
av_cold void ff_h263dsp_init(H263DSPContext *ctx)
Definition: h263dsp.c:117
int size
Definition: avcodec.h:1433
uint8_t * bitstream_buffer
Definition: mpegvideo.h:415
enum AVCodecID codec_id
Definition: mpegvideo.h:112
#define AV_EF_BUFFER
detect improper bitstream length
Definition: avcodec.h:2654
const uint8_t * buffer
Definition: get_bits.h:57
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1898
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1729
int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
int studio_profile
Definition: mpegvideo.h:384
int ff_msmpeg4_decode_ext_header(MpegEncContext *s, int buf_size)
Definition: msmpeg4dec.c:559
mpegvideo header.
discard all
Definition: avcodec.h:796
int ff_mpeg4_workaround_bugs(AVCodecContext *avctx)
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2743
int padding_bug_score
used to detect the VERY common padding bug in MPEG-4
Definition: mpegvideo.h:411
int mb_num
number of MBs of a picture
Definition: mpegvideo.h:133
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2676
QpelDSPContext qdsp
Definition: mpegvideo.h:235
AVCodec.
Definition: avcodec.h:3410
int qscale
QP.
Definition: mpegvideo.h:204
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
int quant_precision
Definition: mpegvideo.h:400
int ff_h263_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: ituh263dec.c:697
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2977
void ff_mpeg4_clean_buffers(MpegEncContext *s)
Definition: mpeg4video.c:45
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:986
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h)
Definition: mpegvideo.c:2226
int context_reinit
Definition: mpegvideo.h:561
static enum AVPixelFormat h263_get_format(AVCodecContext *avctx)
Definition: h263dec.c:48
void ff_h263_decode_init_vlc(void)
Definition: ituh263dec.c:108
uint8_t
#define av_cold
Definition: attributes.h:82
enum OutputFormat out_format
output format
Definition: mpegvideo.h:104
int ff_mpv_common_frame_size_change(MpegEncContext *s)
Definition: mpegvideo.c:1045
Multithreading support functions.
#define ER_MB_ERROR
qpel_mc_func(* qpel_put)[16]
Definition: motion_est.h:91
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:441
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1620
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
int ff_intel_h263_decode_picture_header(MpegEncContext *s)
Definition: intelh263dec.c:27
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:180
GetBitContext last_resync_gb
used to search for the next resync marker
Definition: mpegvideo.h:358
int ff_find_unused_picture(AVCodecContext *avctx, Picture *picture, int shared)
Definition: mpegpicture.c:446
quarterpel DSP functions
uint8_t * data
Definition: avcodec.h:1432
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:200
int ff_set_sar(AVCodecContext *avctx, AVRational sar)
Check that the provided sample aspect ratio is valid and set it on the codec context.
Definition: utils.c:119
#define ff_dlog(a,...)
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:330
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2751
int codec_tag
internal codec_tag upper case converted from avctx codec_tag
Definition: mpegvideo.h:120
void ff_thread_finish_setup(AVCodecContext *avctx)
If the codec defines update_thread_context(), call this when they are ready for the next thread to st...
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:863
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2157
#define av_log(a,...)
static void ff_update_block_index(MpegEncContext *s)
Definition: mpegvideo.h:733
void ff_set_qscale(MpegEncContext *s, int qscale)
set qscale and update qscale dependent variables.
Definition: mpegvideo.c:2297
int ff_msmpeg4_decode_picture_header(MpegEncContext *s)
Definition: msmpeg4dec.c:411
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:596
enum AVCodecID id
Definition: avcodec.h:3424
H263DSPContext h263dsp
Definition: mpegvideo.h:237
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1809
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:185
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
Combine the (truncated) bitstream to a complete frame.
Definition: parser.c:319
int partitioned_frame
is current frame partitioned
Definition: mpegvideo.h:405
#define AVERROR(e)
Definition: error.h:43
AVCodec ff_h263_decoder
Definition: h263dec.c:746
int unrestricted_mv
mv can point outside of the coded picture
Definition: mpegvideo.h:223
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
ERContext er
Definition: mpegvideo.h:563
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1600
#define FF_BUG_NO_PADDING
Definition: avcodec.h:2553
uint16_t width
Definition: gdv.c:47
const char * name
Name of the codec implementation.
Definition: avcodec.h:3417
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
qpel_mc_func put_qpel_pixels_tab[2][16]
Definition: qpeldsp.h:73
GetBitContext gb
Definition: mpegvideo.h:448
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:1124
int ff_mpeg4_decode_studio_slice_header(Mpeg4DecContext *ctx)
Decode the next video packet.
int ff_flv_decode_picture_header(MpegEncContext *s)
Definition: flvdec.c:28
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo.c:2266
static void frame_end(MpegEncContext *s)
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:356
uint8_t * error_status_table
#define ER_AC_ERROR
void ff_h263_loop_filter(MpegEncContext *s)
Definition: h263.c:135
#define AV_CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
Definition: avcodec.h:955
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo.c:1437
enum AVPixelFormat * pix_fmts
array of supported pixel formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3431
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:301
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2644
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
static int get_consumed_bytes(MpegEncContext *s, int buf_size)
Return the number of bytes consumed for building the current frame.
Definition: h263dec.c:166
int last_index
Definition: parser.h:31
int next_p_frame_damaged
set if the next p frame is damaged, to avoid showing trashed B-frames
Definition: mpegvideo.h:360
uint8_t w
Definition: llviddspenc.c:38
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb)
Decode MPEG-4 headers.
int size_in_bits
Definition: get_bits.h:59
int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
Definition: wmv2dec.c:147
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:304
#define s(width, name)
Definition: cbs_vp9.c:257
AVCodec ff_h263p_decoder
Definition: h263dec.c:763
MotionEstContext me
Definition: mpegvideo.h:282
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:2655
#define FRAME_SKIPPED
Return value for header parsers if frame is not coded.
Definition: mpegutils.h:34
int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: h263dec.c:421
HW acceleration through CUDA.
Definition: pixfmt.h:235
void ff_mpv_decode_defaults(MpegEncContext *s)
Set the given MpegEncContext to defaults for decoding.
Definition: mpegvideo.c:664
av_cold int ff_h263_decode_end(AVCodecContext *avctx)
Definition: h263dec.c:155
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:291
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
int first_slice_line
used in MPEG-4 too to handle resync markers
Definition: mpegvideo.h:436
Libavcodec external API header.
void ff_h263_update_motion_val(MpegEncContext *s)
Definition: h263.c:42
int h263_flv
use flv H.263 header
Definition: mpegvideo.h:110
enum AVCodecID codec_id
Definition: avcodec.h:1530
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:464
main external API structure.
Definition: avcodec.h:1520
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1545
void * buf
Definition: avisynth_c.h:690
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo.c:1430
#define SLICE_END
end marker found
Definition: mpegvideo.h:515
Picture * picture
main picture buffer
Definition: mpegvideo.h:136
int data_partitioning
data partitioning flag from header
Definition: mpegvideo.h:404
int extradata_size
Definition: avcodec.h:1621
int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx)
Decode the first and second partition.
int coded_height
Definition: avcodec.h:1707
struct AVFrame * f
Definition: mpegpicture.h:46
HW acceleration through VDPAU, Picture.data[3] contains a VdpVideoSurface.
Definition: pixfmt.h:197
int context_initialized
Definition: mpegvideo.h:124
#define AV_EF_IGNORE_ERR
ignore errors and continue
Definition: avcodec.h:2657
int slice_height
in macroblocks
Definition: mpegvideo.h:435
int ff_h263_decode_picture_header(MpegEncContext *s)
Definition: ituh263dec.c:999
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo.c:1198
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
#define AV_CODEC_CAP_TRUNCATED
Definition: avcodec.h:962
#define FF_BUG_AUTODETECT
autodetection
Definition: avcodec.h:2550
int h263_pred
use MPEG-4/H.263 ac/dc predictions
Definition: mpegvideo.h:105
#define HWACCEL_VAAPI(codec)
Definition: hwaccel.h:73
av_cold int ff_h263_decode_init(AVCodecContext *avctx)
Definition: h263dec.c:68
int ff_h263_resync(MpegEncContext *s)
Decode the group of blocks / video packet header / slice header (MPEG-4 Studio).
Definition: ituh263dec.c:213
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:609
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
qpel_mc_func(* qpel_avg)[16]
Definition: motion_est.h:92
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:506
MpegEncContext.
Definition: mpegvideo.h:81
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
Definition: mpegvideo.h:183
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
discard all non reference
Definition: avcodec.h:792
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
common internal api header.
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:130
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Definition: mpegvideo.c:669
#define FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM
The decoder extracts and fills its parameters even if the frame is skipped due to the skip_frame sett...
Definition: internal.h:60
const uint8_t * buffer_end
Definition: get_bits.h:57
int ff_wmv2_decode_picture_header(MpegEncContext *s)
Definition: wmv2dec.c:127
enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[]
Definition: h263dec.c:729
Picture * last_picture_ptr
pointer to the previous picture.
Definition: mpegvideo.h:182
Bi-dir predicted.
Definition: avutil.h:276
#define H263_GOB_HEIGHT(h)
Definition: h263.h:42
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
void * priv_data
Definition: avcodec.h:1547
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:885
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo.c:1422
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:2214
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:357
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:507
ParseContext parse_context
Definition: mpegvideo.h:362
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:296
#define AV_CODEC_FLAG_TRUNCATED
Input bitstream might be truncated at a random location instead of only at frame boundaries.
Definition: avcodec.h:872
int height
Definition: frame.h:276
#define HWACCEL_VDPAU(codec)
Definition: hwaccel.h:75
void INT64 start
Definition: avisynth_c.h:690
int workaround_bugs
workaround bugs in encoders which cannot be detected automatically
Definition: mpegvideo.h:119
int(* decode_mb)(struct MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.h:509
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:529
#define ER_AC_END
int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
Find the end of the current frame in the bitstream.
av_cold void ff_qpeldsp_init(QpelDSPContext *c)
Definition: qpeldsp.c:783
#define FFSWAP(type, a, b)
Definition: common.h:99
#define CONFIG_MSMPEG4_DECODER
Definition: msmpeg4.h:69
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3668
int ff_h263_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
Definition: h263_parser.c:30
#define FF_QSCALE_TYPE_MPEG1
Definition: internal.h:81
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3679
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: avcodec.h:1409
void ff_mpv_report_decode_progress(MpegEncContext *s)
Definition: mpegvideo.c:2311
#define MAX_NVOP_SIZE
Definition: mpeg4video.h:72
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:961
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
void(* idct)(int16_t *block)
Definition: idctdsp.h:65