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  static const enum AVPictureType pict_types[] =
162  { AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_I /* hmm ... */,
164  MpegEncContext *s = &rv->m;
165  int seq, mb_pos, ret;
166  int rpr_max;
167 
168  s->pict_type = pict_types[get_bits(&s->gb, 2)];
169 
170  if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
171  av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
172  return -1;
173  }
174  if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) {
175  av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
176  return AVERROR_INVALIDDATA;
177  }
178 
179  if (get_bits1(&s->gb)) {
180  av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
181  return AVERROR_INVALIDDATA;
182  }
183 
184  s->qscale = get_bits(&s->gb, 5);
185  if (s->qscale == 0) {
186  av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
187  return AVERROR_INVALIDDATA;
188  }
189 
190  if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
191  s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
192 
193  if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
194  seq = get_bits(&s->gb, 8) << 7;
195  else
196  seq = get_bits(&s->gb, 13) << 2;
197 
198  rpr_max = s->avctx->extradata[1] & 7;
199  if (rpr_max) {
200  int f, new_w, new_h;
201  int rpr_bits = av_log2(rpr_max) + 1;
202 
203  f = get_bits(&s->gb, rpr_bits);
204 
205  if (f) {
206  if (s->avctx->extradata_size < 8 + 2 * f) {
207  av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
208  return AVERROR_INVALIDDATA;
209  }
210 
211  new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
212  new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
213  } else {
214  new_w = rv->orig_width;
215  new_h = rv->orig_height;
216  }
217  if (new_w != s->width || new_h != s->height || !s->context_initialized) {
218  AVRational old_aspect = s->avctx->sample_aspect_ratio;
219  av_log(s->avctx, AV_LOG_DEBUG,
220  "attempting to change resolution to %dx%d\n", new_w, new_h);
221  if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
222  return AVERROR_INVALIDDATA;
223 
224  if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8)
225  return AVERROR_INVALIDDATA;
226 
228 
229  // attempt to keep aspect during typical resolution switches
230  if (!old_aspect.num)
231  old_aspect = (AVRational){1, 1};
232  if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width)
233  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
234  if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width)
235  s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
236 
237  ret = ff_set_dimensions(s->avctx, new_w, new_h);
238  if (ret < 0)
239  return ret;
240 
241  s->width = new_w;
242  s->height = new_h;
243  if ((ret = ff_mpv_common_init(s)) < 0)
244  return ret;
245  }
246 
247  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
248  av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
249  }
250  }
251  if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
252  return AVERROR_INVALIDDATA;
253 
254  mb_pos = ff_h263_decode_mba(s);
255 
256  seq |= s->time & ~0x7FFF;
257  if (seq - s->time > 0x4000)
258  seq -= 0x8000;
259  if (seq - s->time < -0x4000)
260  seq += 0x8000;
261 
262  if (seq != s->time) {
263  if (s->pict_type != AV_PICTURE_TYPE_B) {
264  s->time = seq;
265  s->pp_time = s->time - s->last_non_b_time;
266  s->last_non_b_time = s->time;
267  } else {
268  s->time = seq;
269  s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
270  }
271  }
272  if (s->pict_type == AV_PICTURE_TYPE_B) {
273  if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
274  av_log(s->avctx, AV_LOG_DEBUG,
275  "messed up order, possible from seeking? skipping current B-frame\n");
276 #define ERROR_SKIP_FRAME -123
277  return ERROR_SKIP_FRAME;
278  }
280  }
281 
282  s->no_rounding = get_bits1(&s->gb);
283 
284  if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
285  // binary decoder reads 3+2 bits here but they don't seem to be used
286  skip_bits(&s->gb, 5);
287 
288  s->f_code = 1;
289  s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
290  s->modified_quant = 1;
291  if (!s->avctx->lowres)
292  s->loop_filter = 1;
293 
294  if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
295  av_log(s->avctx, AV_LOG_INFO,
296  "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
297  seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
298  s->no_rounding);
299  }
300 
301  av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
302 
303  return s->mb_width * s->mb_height - mb_pos;
304 }
305 
306 static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15],
307  const uint8_t sym_rl[][2], int sym_rl_elems)
308 {
309  uint16_t syms[MAX_VLC_ENTRIES];
310  uint8_t lens[MAX_VLC_ENTRIES];
311  unsigned nb_syms = 0, nb_lens = 0;
312 
313  for (unsigned i = 0; i < sym_rl_elems; i++) {
314  unsigned cur_sym = sym_rl[i][0];
315  for (unsigned tmp = nb_syms + sym_rl[i][1]; nb_syms <= tmp; nb_syms++)
316  syms[nb_syms] = 0xFF & cur_sym--;
317  }
318 
319  for (unsigned i = 0; i < 15; i++)
320  for (unsigned tmp = nb_lens + len_count[i]; nb_lens < tmp; nb_lens++)
321  lens[nb_lens] = i + 2;
322  av_assert1(nb_lens == nb_syms);
323  ff_vlc_init_from_lengths(vlc, DC_VLC_BITS, nb_lens, lens, 1,
324  syms, 2, 2, 0, VLC_INIT_STATIC_OVERLONG, NULL);
325 }
326 
327 static av_cold void rv10_init_static(void)
328 {
329  static VLCElem table[1472 + 992];
330 
332  rv_dc_lum.table_allocated = 1472;
335  for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) {
336  /* All codes beginning with 0x7F have the same length and value.
337  * Modifying the table directly saves us the useless subtables. */
338  rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i].sym = 255;
339  rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i].len = 18;
340  }
341  rv_dc_chrom.table = &table[1472];
345  for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) {
346  /* Same as above. */
347  rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i].sym = 255;
348  rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i].len = 18;
349  }
351 }
352 
354 {
355  static AVOnce init_static_once = AV_ONCE_INIT;
356  RVDecContext *rv = avctx->priv_data;
357  MpegEncContext *s = &rv->m;
358  int major_ver, minor_ver, micro_ver, ret;
359 
360  if (avctx->extradata_size < 8) {
361  av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
362  return AVERROR_INVALIDDATA;
363  }
364  if ((ret = av_image_check_size(avctx->coded_width,
365  avctx->coded_height, 0, avctx)) < 0)
366  return ret;
367 
368  ff_mpv_decode_init(s, avctx);
369 
370  s->out_format = FMT_H263;
371 
372  rv->orig_width =
373  s->width = avctx->coded_width;
374  rv->orig_height =
375  s->height = avctx->coded_height;
376 
377  s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
378  rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
379 
380  major_ver = RV_GET_MAJOR_VER(rv->sub_id);
381  minor_ver = RV_GET_MINOR_VER(rv->sub_id);
382  micro_ver = RV_GET_MICRO_VER(rv->sub_id);
383 
384  s->low_delay = 1;
385  switch (major_ver) {
386  case 1:
387  s->rv10_version = micro_ver ? 3 : 1;
388  s->obmc = micro_ver == 2;
389  break;
390  case 2:
391  if (minor_ver >= 2) {
392  s->low_delay = 0;
393  s->avctx->has_b_frames = 1;
394  }
395  break;
396  default:
397  av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
398  avpriv_request_sample(avctx, "RV1/2 version");
399  return AVERROR_PATCHWELCOME;
400  }
401 
402  if (avctx->debug & FF_DEBUG_PICT_INFO) {
403  av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
404  ((uint32_t *) avctx->extradata)[0]);
405  }
406 
407  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
408 
409  if ((ret = ff_mpv_common_init(s)) < 0)
410  return ret;
411 
412  ff_h263dsp_init(&s->h263dsp);
413 
414  /* init static VLCs */
415  ff_thread_once(&init_static_once, rv10_init_static);
416 
417  return 0;
418 }
419 
421 {
422  MpegEncContext *s = avctx->priv_data;
423 
425  return 0;
426 }
427 
428 static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
429  int buf_size, int buf_size2, int whole_size)
430 {
431  RVDecContext *rv = avctx->priv_data;
432  MpegEncContext *s = &rv->m;
433  int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
434 
435  active_bits_size = buf_size * 8;
436  init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
437  if (s->codec_id == AV_CODEC_ID_RV10)
438  mb_count = rv10_decode_picture_header(s);
439  else
440  mb_count = rv20_decode_picture_header(rv, whole_size);
441  if (mb_count < 0) {
442  if (mb_count != ERROR_SKIP_FRAME)
443  av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
444  return AVERROR_INVALIDDATA;
445  }
446 
447  if (s->mb_x >= s->mb_width ||
448  s->mb_y >= s->mb_height) {
449  av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
450  return AVERROR_INVALIDDATA;
451  }
452  mb_pos = s->mb_y * s->mb_width + s->mb_x;
453  left = s->mb_width * s->mb_height - mb_pos;
454  if (mb_count > left) {
455  av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
456  return AVERROR_INVALIDDATA;
457  }
458 
459  if (whole_size < s->mb_width * s->mb_height / 8)
460  return AVERROR_INVALIDDATA;
461 
462  if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
463  // FIXME write parser so we always have complete frames?
464  if (s->current_picture_ptr) {
465  ff_er_frame_end(&s->er, NULL);
467  s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
468  }
469  if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
470  return ret;
472  } else {
473  if (s->current_picture_ptr->f->pict_type != s->pict_type) {
474  av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
475  return AVERROR_INVALIDDATA;
476  }
477  }
478 
479 
480  ff_dlog(avctx, "qscale=%d\n", s->qscale);
481 
482  /* default quantization values */
483  if (s->codec_id == AV_CODEC_ID_RV10) {
484  if (s->mb_y == 0)
485  s->first_slice_line = 1;
486  } else {
487  s->first_slice_line = 1;
488  s->resync_mb_x = s->mb_x;
489  }
490  start_mb_x = s->mb_x;
491  s->resync_mb_y = s->mb_y;
492  if (s->h263_aic) {
493  s->y_dc_scale_table =
494  s->c_dc_scale_table = ff_aic_dc_scale_table;
495  } else {
496  s->y_dc_scale_table =
497  s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
498  }
499 
500  if (s->modified_quant)
501  s->chroma_qscale_table = ff_h263_chroma_qscale_table;
502 
503  ff_set_qscale(s, s->qscale);
504 
505  s->rv10_first_dc_coded[0] = 0;
506  s->rv10_first_dc_coded[1] = 0;
507  s->rv10_first_dc_coded[2] = 0;
508  s->block_wrap[0] =
509  s->block_wrap[1] =
510  s->block_wrap[2] =
511  s->block_wrap[3] = s->b8_stride;
512  s->block_wrap[4] =
513  s->block_wrap[5] = s->mb_stride;
515 
516  /* decode each macroblock */
517  for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
518  int ret;
519  ff_update_block_index(s, 8, s->avctx->lowres, 1);
520  ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
521 
522  s->mv_dir = MV_DIR_FORWARD;
523  s->mv_type = MV_TYPE_16X16;
524  ret = ff_h263_decode_mb(s, s->block);
525 
526  // Repeat the slice end check from ff_h263_decode_mb with our active
527  // bitstream size
528  if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
529  int v = show_bits(&s->gb, 16);
530 
531  if (get_bits_count(&s->gb) + 16 > active_bits_size)
532  v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
533 
534  if (!v)
535  ret = SLICE_END;
536  }
537  if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
538  8 * buf_size2 >= get_bits_count(&s->gb)) {
539  active_bits_size = buf_size2 * 8;
540  av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
541  8 * buf_size, active_bits_size);
542  ret = SLICE_OK;
543  }
544 
545  if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
546  av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
547  s->mb_y);
548  return AVERROR_INVALIDDATA;
549  }
550  if (s->pict_type != AV_PICTURE_TYPE_B)
552  ff_mpv_reconstruct_mb(s, s->block);
553  if (s->loop_filter)
555 
556  if (++s->mb_x == s->mb_width) {
557  s->mb_x = 0;
558  s->mb_y++;
560  }
561  if (s->mb_x == s->resync_mb_x)
562  s->first_slice_line = 0;
563  if (ret == SLICE_END)
564  break;
565  }
566 
567  ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
568  ER_MB_END);
569 
570  return active_bits_size;
571 }
572 
573 static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
574 {
575  return AV_RL32(buf + n * 8);
576 }
577 
578 static int rv10_decode_frame(AVCodecContext *avctx, AVFrame *pict,
579  int *got_frame, AVPacket *avpkt)
580 {
581  const uint8_t *buf = avpkt->data;
582  int buf_size = avpkt->size;
583  MpegEncContext *s = avctx->priv_data;
584  int i, ret;
585  int slice_count;
586  const uint8_t *slices_hdr = NULL;
587 
588  ff_dlog(avctx, "*****frame %"PRId64" size=%d\n", avctx->frame_num, buf_size);
589 
590  /* no supplementary picture */
591  if (buf_size == 0) {
592  return 0;
593  }
594 
595  slice_count = (*buf++) + 1;
596  buf_size--;
597 
598  if (!slice_count || buf_size <= 8 * slice_count) {
599  av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
600  slice_count);
601  return AVERROR_INVALIDDATA;
602  }
603 
604  slices_hdr = buf + 4;
605  buf += 8 * slice_count;
606  buf_size -= 8 * slice_count;
607 
608  for (i = 0; i < slice_count; i++) {
609  unsigned offset = get_slice_offset(avctx, slices_hdr, i);
610  int size, size2;
611 
612  if (offset >= buf_size)
613  return AVERROR_INVALIDDATA;
614 
615  if (i + 1 == slice_count)
616  size = buf_size - offset;
617  else
618  size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
619 
620  if (i + 2 >= slice_count)
621  size2 = buf_size - offset;
622  else
623  size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
624 
625  if (size <= 0 || size2 <= 0 ||
626  offset + FFMAX(size, size2) > buf_size)
627  return AVERROR_INVALIDDATA;
628 
629  if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0)
630  return ret;
631 
632  if (ret > 8 * size)
633  i++;
634  }
635 
636  if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
637  ff_er_frame_end(&s->er, NULL);
639 
640  if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
641  if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
642  return ret;
643  ff_print_debug_info(s, s->current_picture_ptr, pict);
644  ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
645  } else if (s->last_picture_ptr) {
646  if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
647  return ret;
648  ff_print_debug_info(s, s->last_picture_ptr, pict);
649  ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_MPV_QSCALE_TYPE_MPEG1);
650  }
651 
652  if (s->last_picture_ptr || s->low_delay) {
653  *got_frame = 1;
654  }
655 
656  // so we can detect if frame_end was not called (find some nicer solution...)
657  s->current_picture_ptr = NULL;
658  }
659 
660  return avpkt->size;
661 }
662 
664  .p.name = "rv10",
665  CODEC_LONG_NAME("RealVideo 1.0"),
666  .p.type = AVMEDIA_TYPE_VIDEO,
667  .p.id = AV_CODEC_ID_RV10,
668  .priv_data_size = sizeof(RVDecContext),
670  .close = rv10_decode_end,
672  .p.capabilities = AV_CODEC_CAP_DR1,
673  .p.max_lowres = 3,
674 };
675 
677  .p.name = "rv20",
678  CODEC_LONG_NAME("RealVideo 2.0"),
679  .p.type = AVMEDIA_TYPE_VIDEO,
680  .p.id = AV_CODEC_ID_RV20,
681  .priv_data_size = sizeof(RVDecContext),
683  .close = rv10_decode_end,
685  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
686  .flush = ff_mpeg_flush,
687  .p.max_lowres = 3,
688 };
ff_mpv_common_init
av_cold int ff_mpv_common_init(MpegEncContext *s)
init common structure for both encoder and decoder.
Definition: mpegvideo.c:681
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:261
h263data.h
ff_vlc_init_from_lengths
int ff_vlc_init_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:306
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:505
ff_h263_decode_mb
int ff_h263_decode_mb(MpegEncContext *s, int16_t block[6][64])
Definition: ituh263dec.c:787
thread.h
AVPictureType
AVPictureType
Definition: avutil.h:277
int64_t
long long int64_t
Definition: coverity.c:34
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:266
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:344
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
AVPacket::data
uint8_t * data
Definition: packet.h:522
table
static const uint16_t table[]
Definition: prosumer.c:205
FFCodec
Definition: codec_internal.h:127
VLCElem::len
VLCBaseType len
Definition: vlc.h:33
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:845
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:94
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:514
RVDecContext
Definition: rv10.c:55
FF_DEBUG_PICT_INFO
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:1397
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:381
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:335
ff_mpv_reconstruct_mb
void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mpegvideo_dec.c:1008
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
ff_h263dsp_init
av_cold void ff_h263dsp_init(H263DSPContext *ctx)
Definition: h263dsp.c:117
VLCElem::sym
VLCBaseType sym
Definition: vlc.h:33
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:633
ff_print_debug_info
void ff_print_debug_info(const MpegEncContext *s, const Picture *p, AVFrame *pict)
Definition: mpegvideo_dec.c:498
SLICE_END
#define SLICE_END
end marker found
Definition: mpegvideo.h:473
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:420
ff_mpv_common_end
void ff_mpv_common_end(MpegEncContext *s)
Definition: mpegvideo.c:782
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:205
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:524
ff_er_frame_end
void ff_er_frame_end(ERContext *s, int *decode_error_flags)
Indicate that a frame has finished decoding and perform error concealment in case it has been enabled...
Definition: error_resilience.c:892
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:287
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:198
RV_GET_MAJOR_VER
#define RV_GET_MAJOR_VER(x)
Definition: rv10.c:48
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:40
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:306
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:73
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:272
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:203
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
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:279
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:388
ff_set_qscale
void ff_set_qscale(MpegEncContext *s, int qscale)
set qscale and update qscale dependent variables.
Definition: mpegvideo.c:878
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:652
FF_MPV_QSCALE_TYPE_MPEG1
#define FF_MPV_QSCALE_TYPE_MPEG1
Definition: mpegvideodec.h:40
AVOnce
#define AVOnce
Definition: thread.h:202
rv10_decode_frame
static int rv10_decode_frame(AVCodecContext *avctx, AVFrame *pict, int *got_frame, AVPacket *avpkt)
Definition: rv10.c:578
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:39
ff_rv20_decoder
const FFCodec ff_rv20_decoder
Definition: rv10.c:676
rv_dc_lum
static VLC rv_dc_lum
Definition: rv10.c:82
f
f
Definition: af_crystalizer.c:121
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:365
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:523
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:354
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:594
size
int size
Definition: twinvq_data.h:10344
VLCElem
Definition: vlc.h:32
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:295
ff_mpeg_flush
void ff_mpeg_flush(AVCodecContext *avctx)
Definition: mpegvideo_dec.c:543
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:428
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:327
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:255
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:523
show_bits
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:371
ff_mpv_decode_init
void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
Initialize the given MpegEncContext for decoding.
Definition: mpegvideo_dec.c:45
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:56
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:194
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:657
ff_rv10_decoder
const FFCodec ff_rv10_decoder
Definition: rv10.c:663
avcodec.h
AVCodecContext::frame_num
int64_t frame_num
Frame counter, set by libavcodec.
Definition: avcodec.h:2030
get_slice_offset
static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
Definition: rv10.c:573
ret
ret
Definition: filter_design.txt:187
SLICE_OK
#define SLICE_OK
Definition: mpegvideo.h:471
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:445
VLC_INIT_STATIC_OVERLONG
#define VLC_INIT_STATIC_OVERLONG
Definition: vlc.h:180
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:281
mpeg4video.h
error_resilience.h
VLC
Definition: vlc.h:36
ff_mpv_frame_end
void ff_mpv_frame_end(MpegEncContext *s)
Definition: mpegvideo_dec.c:490
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:76
VLC::table
VLCElem * table
Definition: vlc.h:38
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:1396
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:633
AV_PICTURE_TYPE_P
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:280
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:353
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
ER_MB_END
#define ER_MB_END
Definition: error_resilience.h:38
SLICE_ERROR
#define SLICE_ERROR
Definition: mpegvideo.h:472
ff_tlog
#define ff_tlog(ctx,...)
Definition: internal.h:153
MV_DIR_FORWARD
#define MV_DIR_FORWARD
Definition: mpegvideo.h:257
AVPacket
This structure stores compressed data.
Definition: packet.h:499
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:472
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:67
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