FFmpeg
rv10.c
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1 /*
2  * RV10/RV20 decoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer
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  * RV10/RV20 decoder
26  */
27 
28 #include <inttypes.h>
29 
30 #include "libavutil/imgutils.h"
31 #include "libavutil/thread.h"
32 
33 #include "avcodec.h"
34 #include "error_resilience.h"
35 #include "h263.h"
36 #include "h263data.h"
37 #include "internal.h"
38 #include "mpeg_er.h"
39 #include "mpegutils.h"
40 #include "mpegvideo.h"
41 #include "mpeg4video.h"
42 #include "mpegvideodata.h"
43 #include "rv10.h"
44 
45 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
46 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
47 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
48 
49 #define MAX_VLC_ENTRIES 1023 // Note: Does not include the skip entries.
50 #define DC_VLC_BITS 9
51 
52 typedef struct RVDecContext {
54  int sub_id;
56 } RVDecContext;
57 
58 /* (run, length) encoded value for the symbols table. The actual symbols
59  * are run..run - length (mod 256).
60  * The last two entries in the following table apply to luma only.
61  * The skip values are not included in this list. */
62 static const uint8_t rv_sym_run_len[][2] = {
63  { 0, 0 }, { 1, 0 }, { 255, 0 }, { 3, 1 }, { 254, 1 },
64  { 7, 3 }, { 252, 3 }, { 15, 7 }, { 248, 7 }, { 31, 15 },
65  { 240, 15 }, { 63, 31 }, { 224, 31 }, { 127, 63 }, { 192, 63 },
66  { 255, 127 }, { 128, 127 }, { 127, 255 }, { 128, 255 },
67 };
68 
69 /* entry[i] of the following tables gives
70  * the number of VLC codes of length i + 2. */
71 static const uint16_t rv_lum_len_count[15] = {
72  1, 0, 2, 4, 8, 16, 32, 0, 64, 0, 128, 0, 256, 0, 512,
73 };
74 
75 static const uint16_t rv_chrom_len_count[15] = {
76  1, 2, 4, 0, 8, 0, 16, 0, 32, 0, 64, 0, 128, 0, 256,
77 };
78 
80 
82 {
83  int code;
84 
85  if (n < 4) {
87  } else {
89  if (code < 0) {
90  av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
91  return -1;
92  }
93  }
94  return code;
95 }
96 
97 /* read RV 1.0 compatible frame header */
99 {
100  int mb_count, pb_frame, marker, mb_xy;
101 
102  marker = get_bits1(&s->gb);
103 
104  if (get_bits1(&s->gb))
105  s->pict_type = AV_PICTURE_TYPE_P;
106  else
107  s->pict_type = AV_PICTURE_TYPE_I;
108 
109  if (!marker)
110  av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
111 
112  pb_frame = get_bits1(&s->gb);
113 
114  ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
115 
116  if (pb_frame) {
117  avpriv_request_sample(s->avctx, "PB-frame");
118  return AVERROR_PATCHWELCOME;
119  }
120 
121  s->qscale = get_bits(&s->gb, 5);
122  if (s->qscale == 0) {
123  av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
124  return AVERROR_INVALIDDATA;
125  }
126 
127  if (s->pict_type == AV_PICTURE_TYPE_I) {
128  if (s->rv10_version == 3) {
129  /* specific MPEG like DC coding not used */
130  s->last_dc[0] = get_bits(&s->gb, 8);
131  s->last_dc[1] = get_bits(&s->gb, 8);
132  s->last_dc[2] = get_bits(&s->gb, 8);
133  ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
134  s->last_dc[1], s->last_dc[2]);
135  }
136  }
137  /* if multiple packets per frame are sent, the position at which
138  * to display the macroblocks is coded here */
139 
140  mb_xy = s->mb_x + s->mb_y * s->mb_width;
141  if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
142  s->mb_x = get_bits(&s->gb, 6); /* mb_x */
143  s->mb_y = get_bits(&s->gb, 6); /* mb_y */
144  mb_count = get_bits(&s->gb, 12);
145  } else {
146  s->mb_x = 0;
147  s->mb_y = 0;
148  mb_count = s->mb_width * s->mb_height;
149  }
150  skip_bits(&s->gb, 3); /* ignored */
151  s->f_code = 1;
152 
153  return mb_count;
154 }
155 
156 static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
157 {
158  MpegEncContext *s = &rv->m;
159  int seq, mb_pos, i, ret;
160  int rpr_max;
161 
162  i = get_bits(&s->gb, 2);
163  switch (i) {
164  case 0:
165  s->pict_type = AV_PICTURE_TYPE_I;
166  break;
167  case 1:
168  s->pict_type = AV_PICTURE_TYPE_I;
169  break; // hmm ...
170  case 2:
171  s->pict_type = AV_PICTURE_TYPE_P;
172  break;
173  case 3:
174  s->pict_type = AV_PICTURE_TYPE_B;
175  break;
176  default:
177  av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
178  return AVERROR_INVALIDDATA;
179  }
180 
181  if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
182  av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
183  return -1;
184  }
185  if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) {
186  av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
187  return AVERROR_INVALIDDATA;
188  }
189 
190  if (get_bits1(&s->gb)) {
191  av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
192  return AVERROR_INVALIDDATA;
193  }
194 
195  s->qscale = get_bits(&s->gb, 5);
196  if (s->qscale == 0) {
197  av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
198  return AVERROR_INVALIDDATA;
199  }
200 
201  if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
202  s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
203 
204  if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
205  seq = get_bits(&s->gb, 8) << 7;
206  else
207  seq = get_bits(&s->gb, 13) << 2;
208 
209  rpr_max = s->avctx->extradata[1] & 7;
210  if (rpr_max) {
211  int f, new_w, new_h;
212  int rpr_bits = av_log2(rpr_max) + 1;
213 
214  f = get_bits(&s->gb, rpr_bits);
215 
216  if (f) {
217  if (s->avctx->extradata_size < 8 + 2 * f) {
218  av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
219  return AVERROR_INVALIDDATA;
220  }
221 
222  new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
223  new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
224  } else {
225  new_w = rv->orig_width;
226  new_h = rv->orig_height;
227  }
228  if (new_w != s->width || new_h != s->height || !s->context_initialized) {
229  AVRational old_aspect = s->avctx->sample_aspect_ratio;
230  av_log(s->avctx, AV_LOG_DEBUG,
231  "attempting to change resolution to %dx%d\n", new_w, new_h);
232  if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
233  return AVERROR_INVALIDDATA;
234 
235  if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8)
236  return AVERROR_INVALIDDATA;
237 
239 
240  // attempt to keep aspect during typical resolution switches
241  if (!old_aspect.num)
242  old_aspect = (AVRational){1, 1};
243  if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width)
244  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
245  if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width)
246  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
247 
248  ret = ff_set_dimensions(s->avctx, new_w, new_h);
249  if (ret < 0)
250  return ret;
251 
252  s->width = new_w;
253  s->height = new_h;
254  if ((ret = ff_mpv_common_init(s)) < 0)
255  return ret;
256  }
257 
258  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
259  av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
260  }
261  }
262  if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
263  return AVERROR_INVALIDDATA;
264 
265  mb_pos = ff_h263_decode_mba(s);
266 
267  seq |= s->time & ~0x7FFF;
268  if (seq - s->time > 0x4000)
269  seq -= 0x8000;
270  if (seq - s->time < -0x4000)
271  seq += 0x8000;
272 
273  if (seq != s->time) {
274  if (s->pict_type != AV_PICTURE_TYPE_B) {
275  s->time = seq;
276  s->pp_time = s->time - s->last_non_b_time;
277  s->last_non_b_time = s->time;
278  } else {
279  s->time = seq;
280  s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
281  }
282  }
283  if (s->pict_type == AV_PICTURE_TYPE_B) {
284  if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
285  av_log(s->avctx, AV_LOG_DEBUG,
286  "messed up order, possible from seeking? skipping current B-frame\n");
287 #define ERROR_SKIP_FRAME -123
288  return ERROR_SKIP_FRAME;
289  }
291  }
292 
293  s->no_rounding = get_bits1(&s->gb);
294 
295  if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
296  // binary decoder reads 3+2 bits here but they don't seem to be used
297  skip_bits(&s->gb, 5);
298 
299  s->f_code = 1;
300  s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
301  s->modified_quant = 1;
302  if (!s->avctx->lowres)
303  s->loop_filter = 1;
304 
305  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
306  av_log(s->avctx, AV_LOG_INFO,
307  "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
308  seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
309  s->no_rounding);
310  }
311 
312  av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
313 
314  return s->mb_width * s->mb_height - mb_pos;
315 }
316 
317 static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15],
318  const uint8_t sym_rl[][2], int sym_rl_elems)
319 {
320  uint16_t syms[MAX_VLC_ENTRIES];
321  uint8_t lens[MAX_VLC_ENTRIES];
322  unsigned nb_syms = 0, nb_lens = 0;
323 
324  for (unsigned i = 0; i < sym_rl_elems; i++) {
325  unsigned cur_sym = sym_rl[i][0];
326  for (unsigned tmp = nb_syms + sym_rl[i][1]; nb_syms <= tmp; nb_syms++)
327  syms[nb_syms] = 0xFF & cur_sym--;
328  }
329 
330  for (unsigned i = 0; i < 15; i++)
331  for (unsigned tmp = nb_lens + len_count[i]; nb_lens < tmp; nb_lens++)
332  lens[nb_lens] = i + 2;
333  av_assert1(nb_lens == nb_syms);
334  ff_init_vlc_from_lengths(vlc, DC_VLC_BITS, nb_lens, lens, 1,
335  syms, 2, 2, 0, INIT_VLC_STATIC_OVERLONG, NULL);
336 }
337 
338 static av_cold void rv10_init_static(void)
339 {
340  static VLC_TYPE table[1472 + 992][2];
341 
343  rv_dc_lum.table_allocated = 1472;
346  for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) {
347  /* All codes beginning with 0x7F have the same length and value.
348  * Modifying the table directly saves us the useless subtables. */
349  rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][0] = 255;
350  rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][1] = 18;
351  }
352  rv_dc_chrom.table = &table[1472];
356  for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) {
357  /* Same as above. */
358  rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][0] = 255;
359  rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][1] = 18;
360  }
362 }
363 
365 {
366  static AVOnce init_static_once = AV_ONCE_INIT;
367  RVDecContext *rv = avctx->priv_data;
368  MpegEncContext *s = &rv->m;
369  int major_ver, minor_ver, micro_ver, ret;
370 
371  if (avctx->extradata_size < 8) {
372  av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
373  return AVERROR_INVALIDDATA;
374  }
375  if ((ret = av_image_check_size(avctx->coded_width,
376  avctx->coded_height, 0, avctx)) < 0)
377  return ret;
378 
379  ff_mpv_decode_init(s, avctx);
380 
381  s->out_format = FMT_H263;
382 
383  rv->orig_width =
384  s->width = avctx->coded_width;
385  rv->orig_height =
386  s->height = avctx->coded_height;
387 
388  s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
389  rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
390 
391  major_ver = RV_GET_MAJOR_VER(rv->sub_id);
392  minor_ver = RV_GET_MINOR_VER(rv->sub_id);
393  micro_ver = RV_GET_MICRO_VER(rv->sub_id);
394 
395  s->low_delay = 1;
396  switch (major_ver) {
397  case 1:
398  s->rv10_version = micro_ver ? 3 : 1;
399  s->obmc = micro_ver == 2;
400  break;
401  case 2:
402  if (minor_ver >= 2) {
403  s->low_delay = 0;
404  s->avctx->has_b_frames = 1;
405  }
406  break;
407  default:
408  av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
409  avpriv_request_sample(avctx, "RV1/2 version");
410  return AVERROR_PATCHWELCOME;
411  }
412 
413  if (avctx->debug & FF_DEBUG_PICT_INFO) {
414  av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
415  ((uint32_t *) avctx->extradata)[0]);
416  }
417 
418  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
419 
421  if ((ret = ff_mpv_common_init(s)) < 0)
422  return ret;
423 
424  ff_h263dsp_init(&s->h263dsp);
425 
426  /* init static VLCs */
427  ff_thread_once(&init_static_once, rv10_init_static);
428 
429  return 0;
430 }
431 
433 {
434  MpegEncContext *s = avctx->priv_data;
435 
437  return 0;
438 }
439 
440 static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
441  int buf_size, int buf_size2, int whole_size)
442 {
443  RVDecContext *rv = avctx->priv_data;
444  MpegEncContext *s = &rv->m;
445  int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
446 
447  active_bits_size = buf_size * 8;
448  init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
449  if (s->codec_id == AV_CODEC_ID_RV10)
450  mb_count = rv10_decode_picture_header(s);
451  else
452  mb_count = rv20_decode_picture_header(rv, whole_size);
453  if (mb_count < 0) {
454  if (mb_count != ERROR_SKIP_FRAME)
455  av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
456  return AVERROR_INVALIDDATA;
457  }
458 
459  if (s->mb_x >= s->mb_width ||
460  s->mb_y >= s->mb_height) {
461  av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
462  return AVERROR_INVALIDDATA;
463  }
464  mb_pos = s->mb_y * s->mb_width + s->mb_x;
465  left = s->mb_width * s->mb_height - mb_pos;
466  if (mb_count > left) {
467  av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
468  return AVERROR_INVALIDDATA;
469  }
470 
471  if (whole_size < s->mb_width * s->mb_height / 8)
472  return AVERROR_INVALIDDATA;
473 
474  if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
475  // FIXME write parser so we always have complete frames?
476  if (s->current_picture_ptr) {
477  ff_er_frame_end(&s->er);
479  s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
480  }
481  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
482  return ret;
484  } else {
485  if (s->current_picture_ptr->f->pict_type != s->pict_type) {
486  av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
487  return AVERROR_INVALIDDATA;
488  }
489  }
490 
491 
492  ff_dlog(avctx, "qscale=%d\n", s->qscale);
493 
494  /* default quantization values */
495  if (s->codec_id == AV_CODEC_ID_RV10) {
496  if (s->mb_y == 0)
497  s->first_slice_line = 1;
498  } else {
499  s->first_slice_line = 1;
500  s->resync_mb_x = s->mb_x;
501  }
502  start_mb_x = s->mb_x;
503  s->resync_mb_y = s->mb_y;
504  if (s->h263_aic) {
505  s->y_dc_scale_table =
506  s->c_dc_scale_table = ff_aic_dc_scale_table;
507  } else {
508  s->y_dc_scale_table =
509  s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
510  }
511 
512  if (s->modified_quant)
513  s->chroma_qscale_table = ff_h263_chroma_qscale_table;
514 
515  ff_set_qscale(s, s->qscale);
516 
517  s->rv10_first_dc_coded[0] = 0;
518  s->rv10_first_dc_coded[1] = 0;
519  s->rv10_first_dc_coded[2] = 0;
520  s->block_wrap[0] =
521  s->block_wrap[1] =
522  s->block_wrap[2] =
523  s->block_wrap[3] = s->b8_stride;
524  s->block_wrap[4] =
525  s->block_wrap[5] = s->mb_stride;
527 
528  /* decode each macroblock */
529  for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
530  int ret;
532  ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
533 
534  s->mv_dir = MV_DIR_FORWARD;
535  s->mv_type = MV_TYPE_16X16;
536  ret = ff_h263_decode_mb(s, s->block);
537 
538  // Repeat the slice end check from ff_h263_decode_mb with our active
539  // bitstream size
540  if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
541  int v = show_bits(&s->gb, 16);
542 
543  if (get_bits_count(&s->gb) + 16 > active_bits_size)
544  v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
545 
546  if (!v)
547  ret = SLICE_END;
548  }
549  if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
550  8 * buf_size2 >= get_bits_count(&s->gb)) {
551  active_bits_size = buf_size2 * 8;
552  av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
553  8 * buf_size, active_bits_size);
554  ret = SLICE_OK;
555  }
556 
557  if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
558  av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
559  s->mb_y);
560  return AVERROR_INVALIDDATA;
561  }
562  if (s->pict_type != AV_PICTURE_TYPE_B)
564  ff_mpv_reconstruct_mb(s, s->block);
565  if (s->loop_filter)
567 
568  if (++s->mb_x == s->mb_width) {
569  s->mb_x = 0;
570  s->mb_y++;
572  }
573  if (s->mb_x == s->resync_mb_x)
574  s->first_slice_line = 0;
575  if (ret == SLICE_END)
576  break;
577  }
578 
579  ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
580  ER_MB_END);
581 
582  return active_bits_size;
583 }
584 
585 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
586 {
587  if (avctx->slice_count)
588  return avctx->slice_offset[n];
589  else
590  return AV_RL32(buf + n * 8);
591 }
592 
593 static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
594  AVPacket *avpkt)
595 {
596  const uint8_t *buf = avpkt->data;
597  int buf_size = avpkt->size;
598  MpegEncContext *s = avctx->priv_data;
599  AVFrame *pict = data;
600  int i, ret;
601  int slice_count;
602  const uint8_t *slices_hdr = NULL;
603 
604  ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
605 
606  /* no supplementary picture */
607  if (buf_size == 0) {
608  return 0;
609  }
610 
611  if (!avctx->slice_count) {
612  slice_count = (*buf++) + 1;
613  buf_size--;
614 
615  if (!slice_count || buf_size <= 8 * slice_count) {
616  av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
617  slice_count);
618  return AVERROR_INVALIDDATA;
619  }
620 
621  slices_hdr = buf + 4;
622  buf += 8 * slice_count;
623  buf_size -= 8 * slice_count;
624  } else
625  slice_count = avctx->slice_count;
626 
627  for (i = 0; i < slice_count; i++) {
628  unsigned offset = get_slice_offset(avctx, slices_hdr, i);
629  int size, size2;
630 
631  if (offset >= buf_size)
632  return AVERROR_INVALIDDATA;
633 
634  if (i + 1 == slice_count)
635  size = buf_size - offset;
636  else
637  size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
638 
639  if (i + 2 >= slice_count)
640  size2 = buf_size - offset;
641  else
642  size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
643 
644  if (size <= 0 || size2 <= 0 ||
645  offset + FFMAX(size, size2) > buf_size)
646  return AVERROR_INVALIDDATA;
647 
648  if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0)
649  return ret;
650 
651  if (ret > 8 * size)
652  i++;
653  }
654 
655  if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
656  ff_er_frame_end(&s->er);
658 
659  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
660  if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
661  return ret;
662  ff_print_debug_info(s, s->current_picture_ptr, pict);
663  ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
664  } else if (s->last_picture_ptr) {
665  if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
666  return ret;
667  ff_print_debug_info(s, s->last_picture_ptr, pict);
668  ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
669  }
670 
671  if (s->last_picture_ptr || s->low_delay) {
672  *got_frame = 1;
673  }
674 
675  // so we can detect if frame_end was not called (find some nicer solution...)
676  s->current_picture_ptr = NULL;
677  }
678 
679  return avpkt->size;
680 }
681 
683  .name = "rv10",
684  .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
685  .type = AVMEDIA_TYPE_VIDEO,
686  .id = AV_CODEC_ID_RV10,
687  .priv_data_size = sizeof(RVDecContext),
689  .close = rv10_decode_end,
691  .capabilities = AV_CODEC_CAP_DR1,
692  .max_lowres = 3,
693  .pix_fmts = (const enum AVPixelFormat[]) {
696  },
697 };
698 
700  .name = "rv20",
701  .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
702  .type = AVMEDIA_TYPE_VIDEO,
703  .id = AV_CODEC_ID_RV20,
704  .priv_data_size = sizeof(RVDecContext),
706  .close = rv10_decode_end,
708  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
709  .flush = ff_mpeg_flush,
710  .max_lowres = 3,
711  .pix_fmts = (const enum AVPixelFormat[]) {
714  },
715 };
ff_mpv_common_init
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:746
AVCodec
AVCodec.
Definition: codec.h:202
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:252
ff_mpeg_flush
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo_dec.c:549
h263data.h
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
RV_GET_MINOR_VER
#define RV_GET_MINOR_VER(x)
Definition: rv10.c:46
ff_mpv_export_qp_table
int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type)
Definition: mpegvideo_dec.c:511
thread.h
ff_mpeg1_dc_scale_table
const uint8_t ff_mpeg1_dc_scale_table[128]
Definition: mpegvideodata.c:33
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:220
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:317
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
AVCodecContext::slice_offset
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:744
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
table
static const uint16_t table[]
Definition: prosumer.c:206
data
const char data[16]
Definition: mxf.c:143
ff_h263_decode_mba
int ff_h263_decode_mba(MpegEncContext *s)
Definition: ituh263dec.c:138
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:798
ff_er_add_slice
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
Definition: error_resilience.c:826
ff_init_block_index
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:1749
mpegvideo.h
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
mpegutils.h
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:660
RVDecContext
Definition: rv10.c:52
FF_DEBUG_PICT_INFO
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1303
AVCodecContext::slice_count
int slice_count
slice count
Definition: avcodec.h:737
MAX_VLC_ENTRIES
#define MAX_VLC_ENTRIES
Definition: rv10.c:49
init
static int init
Definition: av_tx.c:47
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:468
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:380
VLC_TYPE
#define VLC_TYPE
Definition: vlc.h:24
ff_h263dsp_init
av_cold void ff_h263dsp_init(H263DSPContext *ctx)
Definition: h263dsp.c:117
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:571
SLICE_END
#define SLICE_END
end marker found
Definition: mpegvideo.h:496
ff_h263_update_motion_val
void ff_h263_update_motion_val(MpegEncContext *s)
Definition: h263.c:53
AVRational::num
int num
Numerator.
Definition: rational.h:59
rv10_decode_end
static av_cold int rv10_decode_end(AVCodecContext *avctx)
Definition: rv10.c:432
ff_h263_decode_init_vlc
void ff_h263_decode_init_vlc(void)
Definition: ituh263dec.c:108
ff_mpv_common_end
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:887
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:175
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
rv10_decode_picture_header
static int rv10_decode_picture_header(MpegEncContext *s)
Definition: rv10.c:98
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:485
ff_h263_chroma_qscale_table
const uint8_t ff_h263_chroma_qscale_table[32]
Definition: h263data.c:260
s
#define s(width, name)
Definition: cbs_vp9.c:257
RV_GET_MAJOR_VER
#define RV_GET_MAJOR_VER(x)
Definition: rv10.c:45
ff_mpeg_er_frame_start
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:46
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:296
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
rv_dc_chrom
static VLC rv_dc_chrom
Definition: rv10.c:79
rv10_build_vlc
static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15], const uint8_t sym_rl[][2], int sym_rl_elems)
Definition: rv10.c:317
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
f
#define f(width, name)
Definition: cbs_vp9.c:255
ff_mpv_frame_end
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo_dec.c:496
RVDecContext::orig_height
int orig_height
Definition: rv10.c:55
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:173
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:593
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
RVDecContext::orig_width
int orig_width
Definition: rv10.c:55
ff_mpv_idct_init
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:326
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ERROR_SKIP_FRAME
#define ERROR_SKIP_FRAME
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:499
ff_set_qscale
void ff_set_qscale(MpegEncContext *s, int qscale)
set qscale and update qscale dependent variables.
Definition: mpegvideo.c:1785
AVOnce
#define AVOnce
Definition: thread.h:172
rv_chrom_len_count
static const uint16_t rv_chrom_len_count[15]
Definition: rv10.c:75
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
VLC::table_allocated
int table_allocated
Definition: vlc.h:29
rv_dc_lum
static VLC rv_dc_lum
Definition: rv10.c:79
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:374
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
RV_GET_MICRO_VER
#define RV_GET_MICRO_VER(x)
Definition: rv10.c:47
av_frame_ref
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:325
FF_QSCALE_TYPE_MPEG1
#define FF_QSCALE_TYPE_MPEG1
Definition: internal.h:96
size
int size
Definition: twinvq_data.h:10344
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
ff_rv20_decoder
const AVCodec ff_rv20_decoder
Definition: rv10.c:699
RVDecContext::m
MpegEncContext m
Definition: rv10.c:53
mpegvideodata.h
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
rv10.h
rv10_decode_packet
static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int buf_size2, int whole_size)
Definition: rv10.c:440
ff_rv10_decoder
const AVCodec ff_rv10_decoder
Definition: rv10.c:682
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
rv_sym_run_len
static const uint8_t rv_sym_run_len[][2]
Definition: rv10.c:62
ff_rv_decode_dc
int ff_rv_decode_dc(MpegEncContext *s, int n)
Definition: rv10.c:81
ff_update_block_index
static void ff_update_block_index(MpegEncContext *s)
Definition: mpegvideo.h:752
rv10_init_static
static av_cold void rv10_init_static(void)
Definition: rv10.c:338
FMT_H263
@ FMT_H263
Definition: mpegutils.h:125
AV_CODEC_ID_RV10
@ AV_CODEC_ID_RV10
Definition: codec_id.h:55
ff_print_debug_info
void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict)
Definition: mpegvideo_dec.c:504
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
code
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
Definition: filter_design.txt:178
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:484
show_bits
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:447
ff_init_vlc_from_lengths
int ff_init_vlc_from_lengths(VLC *vlc, int nb_bits, int nb_codes, const int8_t *lens, int lens_wrap, const void *symbols, int symbols_wrap, int symbols_size, int offset, int flags, void *logctx)
Build VLC decoding tables suitable for use with get_vlc2()
Definition: bitstream.c:373
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
AV_CODEC_ID_RV20
@ AV_CODEC_ID_RV20
Definition: codec_id.h:56
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:209
ff_mpv_frame_start
int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
Definition: mpegvideo_dec.c:272
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:593
avcodec.h
get_slice_offset
static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
Definition: rv10.c:585
ret
ret
Definition: filter_design.txt:187
SLICE_OK
#define SLICE_OK
Definition: mpegvideo.h:494
INIT_VLC_STATIC_OVERLONG
#define INIT_VLC_STATIC_OVERLONG
Definition: vlc.h:96
ff_aic_dc_scale_table
const uint8_t ff_aic_dc_scale_table[32]
Definition: h263data.c:245
rv20_decode_picture_header
static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
Definition: rv10.c:156
ff_h263_loop_filter
void ff_h263_loop_filter(MpegEncContext *s)
Definition: h263.c:105
ff_mpeg4_init_direct_mv
void ff_mpeg4_init_direct_mv(MpegEncContext *s)
Definition: mpeg4video.c:83
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
rv_lum_len_count
static const uint16_t rv_lum_len_count[15]
Definition: rv10.c:71
AVCodecContext
main external API structure.
Definition: avcodec.h:383
ff_mpv_decode_init
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Initialize the given MpegEncContext for decoding.
Definition: mpegvideo_dec.c:36
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
mpeg4video.h
error_resilience.h
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
VLC
Definition: vlc.h:26
ff_mpv_reconstruct_mb
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo.c:1719
AV_CODEC_CAP_DELAY
#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: codec.h:82
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
AVCodecContext::debug
int debug
debug
Definition: avcodec.h:1302
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:571
AV_PICTURE_TYPE_P
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:275
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
ff_set_dimensions
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:86
rv10_decode_init
static av_cold int rv10_decode_init(AVCodecContext *avctx)
Definition: rv10.c:364
AVCodecContext::frame_number
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:1023
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
ER_MB_END
#define ER_MB_END
Definition: error_resilience.h:39
SLICE_ERROR
#define SLICE_ERROR
Definition: mpegvideo.h:495
ff_tlog
#define ff_tlog(ctx,...)
Definition: internal.h:205
MV_DIR_FORWARD
#define MV_DIR_FORWARD
Definition: mpegvideo.h:248
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:410
ff_er_frame_end
void ff_er_frame_end(ERContext *s)
Definition: error_resilience.c:896
mpeg_er.h
DC_VLC_BITS
#define DC_VLC_BITS
Definition: rv10.c:50
imgutils.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
rv10_decode_frame
static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: rv10.c:593
ff_h263_decode_mb
int ff_h263_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: ituh263dec.c:783
av_image_check_size
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:318
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:69
VLC::table
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
RVDecContext::sub_id
int sub_id
Definition: rv10.c:54
h263.h