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 "codec_internal.h"
35 #include "decode.h"
36 #include "error_resilience.h"
37 #include "h263.h"
38 #include "h263data.h"
39 #include "h263dec.h"
40 #include "mpeg_er.h"
41 #include "mpegutils.h"
42 #include "mpegvideo.h"
43 #include "mpegvideodec.h"
44 #include "mpeg4video.h"
45 #include "mpegvideodata.h"
46 #include "rv10dec.h"
47 
48 #define RV_GET_MAJOR_VER(x) ((x) >> 28)
49 #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
50 #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
51 
52 #define MAX_VLC_ENTRIES 1023 // Note: Does not include the skip entries.
53 #define DC_VLC_BITS 9
54 
55 typedef struct RVDecContext {
57  int sub_id;
59 } RVDecContext;
60 
61 /* (run, length) encoded value for the symbols table. The actual symbols
62  * are run..run - length (mod 256).
63  * The last two entries in the following table apply to luma only.
64  * The skip values are not included in this list. */
65 static const uint8_t rv_sym_run_len[][2] = {
66  { 0, 0 }, { 1, 0 }, { 255, 0 }, { 3, 1 }, { 254, 1 },
67  { 7, 3 }, { 252, 3 }, { 15, 7 }, { 248, 7 }, { 31, 15 },
68  { 240, 15 }, { 63, 31 }, { 224, 31 }, { 127, 63 }, { 192, 63 },
69  { 255, 127 }, { 128, 127 }, { 127, 255 }, { 128, 255 },
70 };
71 
72 /* entry[i] of the following tables gives
73  * the number of VLC codes of length i + 2. */
74 static const uint16_t rv_lum_len_count[15] = {
75  1, 0, 2, 4, 8, 16, 32, 0, 64, 0, 128, 0, 256, 0, 512,
76 };
77 
78 static const uint16_t rv_chrom_len_count[15] = {
79  1, 2, 4, 0, 8, 0, 16, 0, 32, 0, 64, 0, 128, 0, 256,
80 };
81 
83 
85 {
86  int code;
87 
88  if (n < 4) {
90  } else {
92  if (code < 0) {
93  av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
94  return -1;
95  }
96  }
97  return code;
98 }
99 
100 /* read RV 1.0 compatible frame header */
102 {
103  int mb_count, pb_frame, marker, mb_xy;
104 
105  marker = get_bits1(&s->gb);
106 
107  if (get_bits1(&s->gb))
108  s->pict_type = AV_PICTURE_TYPE_P;
109  else
110  s->pict_type = AV_PICTURE_TYPE_I;
111 
112  if (!marker)
113  av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
114 
115  pb_frame = get_bits1(&s->gb);
116 
117  ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
118 
119  if (pb_frame) {
120  avpriv_request_sample(s->avctx, "PB-frame");
121  return AVERROR_PATCHWELCOME;
122  }
123 
124  s->qscale = get_bits(&s->gb, 5);
125  if (s->qscale == 0) {
126  av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
127  return AVERROR_INVALIDDATA;
128  }
129 
130  if (s->pict_type == AV_PICTURE_TYPE_I) {
131  if (s->rv10_version == 3) {
132  /* specific MPEG like DC coding not used */
133  s->last_dc[0] = get_bits(&s->gb, 8);
134  s->last_dc[1] = get_bits(&s->gb, 8);
135  s->last_dc[2] = get_bits(&s->gb, 8);
136  ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
137  s->last_dc[1], s->last_dc[2]);
138  }
139  }
140  /* if multiple packets per frame are sent, the position at which
141  * to display the macroblocks is coded here */
142 
143  mb_xy = s->mb_x + s->mb_y * s->mb_width;
144  if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
145  s->mb_x = get_bits(&s->gb, 6); /* mb_x */
146  s->mb_y = get_bits(&s->gb, 6); /* mb_y */
147  mb_count = get_bits(&s->gb, 12);
148  } else {
149  s->mb_x = 0;
150  s->mb_y = 0;
151  mb_count = s->mb_width * s->mb_height;
152  }
153  skip_bits(&s->gb, 3); /* ignored */
154  s->f_code = 1;
155 
156  return mb_count;
157 }
158 
159 static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
160 {
161  MpegEncContext *s = &rv->m;
162  int seq, mb_pos, i, ret;
163  int rpr_max;
164 
165  i = get_bits(&s->gb, 2);
166  switch (i) {
167  case 0:
168  s->pict_type = AV_PICTURE_TYPE_I;
169  break;
170  case 1:
171  s->pict_type = AV_PICTURE_TYPE_I;
172  break; // hmm ...
173  case 2:
174  s->pict_type = AV_PICTURE_TYPE_P;
175  break;
176  case 3:
177  s->pict_type = AV_PICTURE_TYPE_B;
178  break;
179  default:
180  av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
181  return AVERROR_INVALIDDATA;
182  }
183 
184  if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
185  av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
186  return -1;
187  }
188  if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) {
189  av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
190  return AVERROR_INVALIDDATA;
191  }
192 
193  if (get_bits1(&s->gb)) {
194  av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
195  return AVERROR_INVALIDDATA;
196  }
197 
198  s->qscale = get_bits(&s->gb, 5);
199  if (s->qscale == 0) {
200  av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
201  return AVERROR_INVALIDDATA;
202  }
203 
204  if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
205  s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
206 
207  if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
208  seq = get_bits(&s->gb, 8) << 7;
209  else
210  seq = get_bits(&s->gb, 13) << 2;
211 
212  rpr_max = s->avctx->extradata[1] & 7;
213  if (rpr_max) {
214  int f, new_w, new_h;
215  int rpr_bits = av_log2(rpr_max) + 1;
216 
217  f = get_bits(&s->gb, rpr_bits);
218 
219  if (f) {
220  if (s->avctx->extradata_size < 8 + 2 * f) {
221  av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
222  return AVERROR_INVALIDDATA;
223  }
224 
225  new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
226  new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
227  } else {
228  new_w = rv->orig_width;
229  new_h = rv->orig_height;
230  }
231  if (new_w != s->width || new_h != s->height || !s->context_initialized) {
232  AVRational old_aspect = s->avctx->sample_aspect_ratio;
233  av_log(s->avctx, AV_LOG_DEBUG,
234  "attempting to change resolution to %dx%d\n", new_w, new_h);
235  if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
236  return AVERROR_INVALIDDATA;
237 
238  if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8)
239  return AVERROR_INVALIDDATA;
240 
242 
243  // attempt to keep aspect during typical resolution switches
244  if (!old_aspect.num)
245  old_aspect = (AVRational){1, 1};
246  if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width)
247  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
248  if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width)
249  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
250 
251  ret = ff_set_dimensions(s->avctx, new_w, new_h);
252  if (ret < 0)
253  return ret;
254 
255  s->width = new_w;
256  s->height = new_h;
257  if ((ret = ff_mpv_common_init(s)) < 0)
258  return ret;
259  }
260 
261  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
262  av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
263  }
264  }
265  if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
266  return AVERROR_INVALIDDATA;
267 
268  mb_pos = ff_h263_decode_mba(s);
269 
270  seq |= s->time & ~0x7FFF;
271  if (seq - s->time > 0x4000)
272  seq -= 0x8000;
273  if (seq - s->time < -0x4000)
274  seq += 0x8000;
275 
276  if (seq != s->time) {
277  if (s->pict_type != AV_PICTURE_TYPE_B) {
278  s->time = seq;
279  s->pp_time = s->time - s->last_non_b_time;
280  s->last_non_b_time = s->time;
281  } else {
282  s->time = seq;
283  s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
284  }
285  }
286  if (s->pict_type == AV_PICTURE_TYPE_B) {
287  if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
288  av_log(s->avctx, AV_LOG_DEBUG,
289  "messed up order, possible from seeking? skipping current B-frame\n");
290 #define ERROR_SKIP_FRAME -123
291  return ERROR_SKIP_FRAME;
292  }
294  }
295 
296  s->no_rounding = get_bits1(&s->gb);
297 
298  if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
299  // binary decoder reads 3+2 bits here but they don't seem to be used
300  skip_bits(&s->gb, 5);
301 
302  s->f_code = 1;
303  s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
304  s->modified_quant = 1;
305  if (!s->avctx->lowres)
306  s->loop_filter = 1;
307 
308  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
309  av_log(s->avctx, AV_LOG_INFO,
310  "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
311  seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
312  s->no_rounding);
313  }
314 
315  av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
316 
317  return s->mb_width * s->mb_height - mb_pos;
318 }
319 
320 static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15],
321  const uint8_t sym_rl[][2], int sym_rl_elems)
322 {
323  uint16_t syms[MAX_VLC_ENTRIES];
324  uint8_t lens[MAX_VLC_ENTRIES];
325  unsigned nb_syms = 0, nb_lens = 0;
326 
327  for (unsigned i = 0; i < sym_rl_elems; i++) {
328  unsigned cur_sym = sym_rl[i][0];
329  for (unsigned tmp = nb_syms + sym_rl[i][1]; nb_syms <= tmp; nb_syms++)
330  syms[nb_syms] = 0xFF & cur_sym--;
331  }
332 
333  for (unsigned i = 0; i < 15; i++)
334  for (unsigned tmp = nb_lens + len_count[i]; nb_lens < tmp; nb_lens++)
335  lens[nb_lens] = i + 2;
336  av_assert1(nb_lens == nb_syms);
337  ff_init_vlc_from_lengths(vlc, DC_VLC_BITS, nb_lens, lens, 1,
338  syms, 2, 2, 0, INIT_VLC_STATIC_OVERLONG, NULL);
339 }
340 
341 static av_cold void rv10_init_static(void)
342 {
343  static VLCElem table[1472 + 992];
344 
346  rv_dc_lum.table_allocated = 1472;
349  for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) {
350  /* All codes beginning with 0x7F have the same length and value.
351  * Modifying the table directly saves us the useless subtables. */
352  rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i].sym = 255;
353  rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i].len = 18;
354  }
355  rv_dc_chrom.table = &table[1472];
359  for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) {
360  /* Same as above. */
361  rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i].sym = 255;
362  rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i].len = 18;
363  }
365 }
366 
368 {
369  static AVOnce init_static_once = AV_ONCE_INIT;
370  RVDecContext *rv = avctx->priv_data;
371  MpegEncContext *s = &rv->m;
372  int major_ver, minor_ver, micro_ver, ret;
373 
374  if (avctx->extradata_size < 8) {
375  av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
376  return AVERROR_INVALIDDATA;
377  }
378  if ((ret = av_image_check_size(avctx->coded_width,
379  avctx->coded_height, 0, avctx)) < 0)
380  return ret;
381 
382  ff_mpv_decode_init(s, avctx);
383 
384  s->out_format = FMT_H263;
385 
386  rv->orig_width =
387  s->width = avctx->coded_width;
388  rv->orig_height =
389  s->height = avctx->coded_height;
390 
391  s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
392  rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
393 
394  major_ver = RV_GET_MAJOR_VER(rv->sub_id);
395  minor_ver = RV_GET_MINOR_VER(rv->sub_id);
396  micro_ver = RV_GET_MICRO_VER(rv->sub_id);
397 
398  s->low_delay = 1;
399  switch (major_ver) {
400  case 1:
401  s->rv10_version = micro_ver ? 3 : 1;
402  s->obmc = micro_ver == 2;
403  break;
404  case 2:
405  if (minor_ver >= 2) {
406  s->low_delay = 0;
407  s->avctx->has_b_frames = 1;
408  }
409  break;
410  default:
411  av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
412  avpriv_request_sample(avctx, "RV1/2 version");
413  return AVERROR_PATCHWELCOME;
414  }
415 
416  if (avctx->debug & FF_DEBUG_PICT_INFO) {
417  av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
418  ((uint32_t *) avctx->extradata)[0]);
419  }
420 
421  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
422 
424  if ((ret = ff_mpv_common_init(s)) < 0)
425  return ret;
426 
427  ff_h263dsp_init(&s->h263dsp);
428 
429  /* init static VLCs */
430  ff_thread_once(&init_static_once, rv10_init_static);
431 
432  return 0;
433 }
434 
436 {
437  MpegEncContext *s = avctx->priv_data;
438 
440  return 0;
441 }
442 
443 static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
444  int buf_size, int buf_size2, int whole_size)
445 {
446  RVDecContext *rv = avctx->priv_data;
447  MpegEncContext *s = &rv->m;
448  int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
449 
450  active_bits_size = buf_size * 8;
451  init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
452  if (s->codec_id == AV_CODEC_ID_RV10)
453  mb_count = rv10_decode_picture_header(s);
454  else
455  mb_count = rv20_decode_picture_header(rv, whole_size);
456  if (mb_count < 0) {
457  if (mb_count != ERROR_SKIP_FRAME)
458  av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
459  return AVERROR_INVALIDDATA;
460  }
461 
462  if (s->mb_x >= s->mb_width ||
463  s->mb_y >= s->mb_height) {
464  av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
465  return AVERROR_INVALIDDATA;
466  }
467  mb_pos = s->mb_y * s->mb_width + s->mb_x;
468  left = s->mb_width * s->mb_height - mb_pos;
469  if (mb_count > left) {
470  av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
471  return AVERROR_INVALIDDATA;
472  }
473 
474  if (whole_size < s->mb_width * s->mb_height / 8)
475  return AVERROR_INVALIDDATA;
476 
477  if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
478  // FIXME write parser so we always have complete frames?
479  if (s->current_picture_ptr) {
480  ff_er_frame_end(&s->er);
482  s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
483  }
484  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
485  return ret;
487  } else {
488  if (s->current_picture_ptr->f->pict_type != s->pict_type) {
489  av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
490  return AVERROR_INVALIDDATA;
491  }
492  }
493 
494 
495  ff_dlog(avctx, "qscale=%d\n", s->qscale);
496 
497  /* default quantization values */
498  if (s->codec_id == AV_CODEC_ID_RV10) {
499  if (s->mb_y == 0)
500  s->first_slice_line = 1;
501  } else {
502  s->first_slice_line = 1;
503  s->resync_mb_x = s->mb_x;
504  }
505  start_mb_x = s->mb_x;
506  s->resync_mb_y = s->mb_y;
507  if (s->h263_aic) {
508  s->y_dc_scale_table =
509  s->c_dc_scale_table = ff_aic_dc_scale_table;
510  } else {
511  s->y_dc_scale_table =
512  s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
513  }
514 
515  if (s->modified_quant)
516  s->chroma_qscale_table = ff_h263_chroma_qscale_table;
517 
518  ff_set_qscale(s, s->qscale);
519 
520  s->rv10_first_dc_coded[0] = 0;
521  s->rv10_first_dc_coded[1] = 0;
522  s->rv10_first_dc_coded[2] = 0;
523  s->block_wrap[0] =
524  s->block_wrap[1] =
525  s->block_wrap[2] =
526  s->block_wrap[3] = s->b8_stride;
527  s->block_wrap[4] =
528  s->block_wrap[5] = s->mb_stride;
530 
531  /* decode each macroblock */
532  for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
533  int ret;
534  ff_update_block_index(s, 8, s->avctx->lowres, 1);
535  ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
536 
537  s->mv_dir = MV_DIR_FORWARD;
538  s->mv_type = MV_TYPE_16X16;
539  ret = ff_h263_decode_mb(s, s->block);
540 
541  // Repeat the slice end check from ff_h263_decode_mb with our active
542  // bitstream size
543  if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
544  int v = show_bits(&s->gb, 16);
545 
546  if (get_bits_count(&s->gb) + 16 > active_bits_size)
547  v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
548 
549  if (!v)
550  ret = SLICE_END;
551  }
552  if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
553  8 * buf_size2 >= get_bits_count(&s->gb)) {
554  active_bits_size = buf_size2 * 8;
555  av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
556  8 * buf_size, active_bits_size);
557  ret = SLICE_OK;
558  }
559 
560  if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
561  av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
562  s->mb_y);
563  return AVERROR_INVALIDDATA;
564  }
565  if (s->pict_type != AV_PICTURE_TYPE_B)
567  ff_mpv_reconstruct_mb(s, s->block);
568  if (s->loop_filter)
570 
571  if (++s->mb_x == s->mb_width) {
572  s->mb_x = 0;
573  s->mb_y++;
575  }
576  if (s->mb_x == s->resync_mb_x)
577  s->first_slice_line = 0;
578  if (ret == SLICE_END)
579  break;
580  }
581 
582  ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
583  ER_MB_END);
584 
585  return active_bits_size;
586 }
587 
588 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
589 {
590  if (avctx->slice_count)
591  return avctx->slice_offset[n];
592  else
593  return AV_RL32(buf + n * 8);
594 }
595 
596 static int rv10_decode_frame(AVCodecContext *avctx, AVFrame *pict,
597  int *got_frame, AVPacket *avpkt)
598 {
599  const uint8_t *buf = avpkt->data;
600  int buf_size = avpkt->size;
601  MpegEncContext *s = avctx->priv_data;
602  int i, ret;
603  int slice_count;
604  const uint8_t *slices_hdr = NULL;
605 
606  ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
607 
608  /* no supplementary picture */
609  if (buf_size == 0) {
610  return 0;
611  }
612 
613  if (!avctx->slice_count) {
614  slice_count = (*buf++) + 1;
615  buf_size--;
616 
617  if (!slice_count || buf_size <= 8 * slice_count) {
618  av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
619  slice_count);
620  return AVERROR_INVALIDDATA;
621  }
622 
623  slices_hdr = buf + 4;
624  buf += 8 * slice_count;
625  buf_size -= 8 * slice_count;
626  } else
627  slice_count = avctx->slice_count;
628 
629  for (i = 0; i < slice_count; i++) {
630  unsigned offset = get_slice_offset(avctx, slices_hdr, i);
631  int size, size2;
632 
633  if (offset >= buf_size)
634  return AVERROR_INVALIDDATA;
635 
636  if (i + 1 == slice_count)
637  size = buf_size - offset;
638  else
639  size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
640 
641  if (i + 2 >= slice_count)
642  size2 = buf_size - offset;
643  else
644  size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
645 
646  if (size <= 0 || size2 <= 0 ||
647  offset + FFMAX(size, size2) > buf_size)
648  return AVERROR_INVALIDDATA;
649 
650  if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0)
651  return ret;
652 
653  if (ret > 8 * size)
654  i++;
655  }
656 
657  if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
658  ff_er_frame_end(&s->er);
660 
661  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
662  if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
663  return ret;
664  ff_print_debug_info(s, s->current_picture_ptr, pict);
665  ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
666  } else if (s->last_picture_ptr) {
667  if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
668  return ret;
669  ff_print_debug_info(s, s->last_picture_ptr, pict);
670  ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
671  }
672 
673  if (s->last_picture_ptr || s->low_delay) {
674  *got_frame = 1;
675  }
676 
677  // so we can detect if frame_end was not called (find some nicer solution...)
678  s->current_picture_ptr = NULL;
679  }
680 
681  return avpkt->size;
682 }
683 
685  .p.name = "rv10",
686  CODEC_LONG_NAME("RealVideo 1.0"),
687  .p.type = AVMEDIA_TYPE_VIDEO,
688  .p.id = AV_CODEC_ID_RV10,
689  .priv_data_size = sizeof(RVDecContext),
691  .close = rv10_decode_end,
693  .p.capabilities = AV_CODEC_CAP_DR1,
694  .p.max_lowres = 3,
695  .p.pix_fmts = (const enum AVPixelFormat[]) {
698  },
699 };
700 
702  .p.name = "rv20",
703  CODEC_LONG_NAME("RealVideo 2.0"),
704  .p.type = AVMEDIA_TYPE_VIDEO,
705  .p.id = AV_CODEC_ID_RV20,
706  .priv_data_size = sizeof(RVDecContext),
708  .close = rv10_decode_end,
710  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
711  .flush = ff_mpeg_flush,
712  .p.max_lowres = 3,
713  .p.pix_fmts = (const enum AVPixelFormat[]) {
716  },
717 };
ff_mpv_common_init
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:682
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:264
h263data.h
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
RV_GET_MINOR_VER
#define RV_GET_MINOR_VER(x)
Definition: rv10.c:49
ff_mpv_export_qp_table
int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, const Picture *p, int qp_type)
Definition: mpegvideo_dec.c:502
ff_h263_decode_mb
int ff_h263_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: ituh263dec.c:787
thread.h
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
AVCodecContext::slice_offset
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:759
AVPacket::data
uint8_t * data
Definition: packet.h:374
table
static const uint16_t table[]
Definition: prosumer.c:205
FFCodec
Definition: codec_internal.h:119
VLCElem::len
VLCBaseType len
Definition: vlc.h:28
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:822
ff_init_block_index
void ff_init_block_index(MpegEncContext *s)
Definition: mpegvideo.c:857
mpegvideo.h
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
ff_h263_decode_mba
int ff_h263_decode_mba(MpegEncContext *s)
Definition: ituh263dec.c:142
mpegutils.h
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:91
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:649
RVDecContext
Definition: rv10.c:55
FF_DEBUG_PICT_INFO
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1328
AVCodecContext::slice_count
int slice_count
slice count
Definition: avcodec.h:752
MAX_VLC_ENTRIES
#define MAX_VLC_ENTRIES
Definition: rv10.c:52
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
ff_mpv_reconstruct_mb
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo_dec.c:1010
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:123
ff_h263dsp_init
av_cold void ff_h263dsp_init(H263DSPContext *ctx)
Definition: h263dsp.c:117
VLCElem::sym
VLCBaseType sym
Definition: vlc.h:28
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:586
ff_print_debug_info
void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict)
Definition: mpegvideo_dec.c:495
SLICE_END
#define SLICE_END
end marker found
Definition: mpegvideo.h:480
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:435
ff_mpv_common_end
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:788
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:184
mpegvideodec.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
h263dec.h
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:101
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:500
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:298
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:256
RV_GET_MAJOR_VER
#define RV_GET_MAJOR_VER(x)
Definition: rv10.c:48
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:363
ff_mpeg_er_frame_start
void ff_mpeg_er_frame_start(MpegEncContext *s)
Definition: mpeg_er.c:47
ff_mpeg1_dc_scale_table
static const uint8_t *const ff_mpeg1_dc_scale_table
Definition: mpegvideodata.h:32
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
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:82
decode.h
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:320
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
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:264
ff_h263_decode_init_vlc
void ff_h263_decode_init_vlc(void)
Definition: ituh263dec.c:136
RVDecContext::orig_height
int orig_height
Definition: rv10.c:58
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:182
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:58
ff_mpv_idct_init
av_cold void ff_mpv_idct_init(MpegEncContext *s)
Definition: mpegvideo.c:342
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:498
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: vlc.c:328
ff_set_qscale
void ff_set_qscale(MpegEncContext *s, int qscale)
set qscale and update qscale dependent variables.
Definition: mpegvideo.c:890
get_vlc2
static av_always_inline int get_vlc2(GetBitContext *s, const VLCElem *table, int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:787
FF_MPV_QSCALE_TYPE_MPEG1
#define FF_MPV_QSCALE_TYPE_MPEG1
Definition: mpegvideodec.h:40
AVOnce
#define AVOnce
Definition: thread.h:181
rv10_decode_frame
static int rv10_decode_frame(AVCodecContext *avctx, AVFrame *pict, int *got_frame, AVPacket *avpkt)
Definition: rv10.c:596
rv_chrom_len_count
static const uint16_t rv_chrom_len_count[15]
Definition: rv10.c:78
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:28
VLC::table_allocated
int table_allocated
Definition: vlc.h:34
ff_rv20_decoder
const FFCodec ff_rv20_decoder
Definition: rv10.c:701
rv_dc_lum
static VLC rv_dc_lum
Definition: rv10.c:82
f
f
Definition: af_crystalizer.c:122
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:375
RV_GET_MICRO_VER
#define RV_GET_MICRO_VER(x)
Definition: rv10.c:50
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:353
codec_internal.h
ff_update_block_index
static void ff_update_block_index(MpegEncContext *s, int bits_per_raw_sample, int lowres, int chroma_x_shift)
Definition: mpegvideo.h:601
size
int size
Definition: twinvq_data.h:10344
VLCElem
Definition: vlc.h:27
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_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:271
ff_mpeg_flush
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo_dec.c:540
RVDecContext::m
MpegEncContext m
Definition: rv10.c:56
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_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:443
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:65
ff_rv_decode_dc
int ff_rv_decode_dc(MpegEncContext *s, int n)
Definition: rv10.c:84
rv10_init_static
static av_cold void rv10_init_static(void)
Definition: rv10.c:341
FMT_H263
@ FMT_H263
Definition: mpegutils.h:119
AV_CODEC_ID_RV10
@ AV_CODEC_ID_RV10
Definition: codec_id.h:57
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
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:499
show_bits
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:446
ff_mpv_decode_init
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Initialize the given MpegEncContext for decoding.
Definition: mpegvideo_dec.c:42
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:58
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:211
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:608
ff_rv10_decoder
const FFCodec ff_rv10_decoder
Definition: rv10.c:684
avcodec.h
get_slice_offset
static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
Definition: rv10.c:588
ret
ret
Definition: filter_design.txt:187
SLICE_OK
#define SLICE_OK
Definition: mpegvideo.h:478
INIT_VLC_STATIC_OVERLONG
#define INIT_VLC_STATIC_OVERLONG
Definition: vlc.h:101
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:159
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:74
AVCodecContext
main external API structure.
Definition: avcodec.h:398
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:31
ff_mpv_frame_end
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo_dec.c:487
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
VLC::table
VLCElem * table
Definition: vlc.h:33
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:1327
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:586
AV_PICTURE_TYPE_P
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:275
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
rv10_decode_init
static av_cold int rv10_decode_init(AVCodecContext *avctx)
Definition: rv10.c:367
AVCodecContext::frame_number
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:1046
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
ER_MB_END
#define ER_MB_END
Definition: error_resilience.h:39
SLICE_ERROR
#define SLICE_ERROR
Definition: mpegvideo.h:479
ff_tlog
#define ff_tlog(ctx,...)
Definition: internal.h:162
MV_DIR_FORWARD
#define MV_DIR_FORWARD
Definition: mpegvideo.h:260
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:425
ff_er_frame_end
void ff_er_frame_end(ERContext *s)
Definition: error_resilience.c:892
mpeg_er.h
DC_VLC_BITS
#define DC_VLC_BITS
Definition: rv10.c:53
imgutils.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
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:70
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
rv10dec.h
RVDecContext::sub_id
int sub_id
Definition: rv10.c:57
h263.h