FFmpeg  4.3.8
mpeg12enc.c
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1 /*
2  * MPEG-1/2 encoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * MPEG-1/2 encoder
26  */
27 
28 #include <stdint.h>
29 
30 #include "libavutil/attributes.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/log.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/timecode.h"
35 #include "libavutil/stereo3d.h"
36 
37 #include "avcodec.h"
38 #include "bytestream.h"
39 #include "mathops.h"
40 #include "mpeg12.h"
41 #include "mpeg12data.h"
42 #include "mpegutils.h"
43 #include "mpegvideo.h"
44 #include "profiles.h"
45 
47  0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
48  0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
49 };
50 
51 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
52 static uint8_t fcode_tab[MAX_MV * 2 + 1];
53 
54 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
55 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
56 
57 /* simple include everything table for dc, first byte is bits
58  * number next 3 are code */
59 static uint32_t mpeg1_lum_dc_uni[512];
60 static uint32_t mpeg1_chr_dc_uni[512];
61 
62 static uint8_t mpeg1_index_run[2][64];
63 static int8_t mpeg1_max_level[2][64];
64 
65 #define A53_MAX_CC_COUNT 0x1f
66 
67 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
68 {
69  int i;
70 
71  for (i = 0; i < 128; i++) {
72  int level = i - 64;
73  int run;
74  if (!level)
75  continue;
76  for (run = 0; run < 64; run++) {
77  int len, code;
78  int alevel = FFABS(level);
79 
80  if (alevel > rl->max_level[0][run])
81  code = 111; /* rl->n */
82  else
83  code = rl->index_run[0][run] + alevel - 1;
84 
85  if (code < 111) { /* rl->n */
86  /* length of VLC and sign */
87  len = rl->table_vlc[code][1] + 1;
88  } else {
89  len = rl->table_vlc[111 /* rl->n */][1] + 6;
90 
91  if (alevel < 128)
92  len += 8;
93  else
94  len += 16;
95  }
96 
97  uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
98  }
99  }
100 }
101 
103 {
104  int i;
105  AVRational bestq = (AVRational) {0, 0};
106  AVRational ext;
107  AVRational target = av_inv_q(s->avctx->time_base);
108 
109  for (i = 1; i < 14; i++) {
111  i >= 9)
112  break;
113 
114  for (ext.num=1; ext.num <= 4; ext.num++) {
115  for (ext.den=1; ext.den <= 32; ext.den++) {
117 
118  if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
119  continue;
120  if (av_gcd(ext.den, ext.num) != 1)
121  continue;
122 
123  if ( bestq.num==0
124  || av_nearer_q(target, bestq, q) < 0
125  || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
126  bestq = q;
127  s->frame_rate_index = i;
128  s->mpeg2_frame_rate_ext.num = ext.num;
129  s->mpeg2_frame_rate_ext.den = ext.den;
130  }
131  }
132  }
133  }
134 
135  if (av_cmp_q(target, bestq))
136  return -1;
137  else
138  return 0;
139 }
140 
142 {
143  int ret;
144  MpegEncContext *s = avctx->priv_data;
145 
146  if ((ret = ff_mpv_encode_init(avctx)) < 0)
147  return ret;
148 
149  if (find_frame_rate_index(s) < 0) {
151  av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
152  avctx->time_base.den, avctx->time_base.num);
153  return AVERROR(EINVAL);
154  } else {
155  av_log(avctx, AV_LOG_INFO,
156  "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
157  avctx->time_base.den, avctx->time_base.num);
158  }
159  }
160 
161  if (avctx->profile == FF_PROFILE_UNKNOWN) {
162  if (avctx->level != FF_LEVEL_UNKNOWN) {
163  av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
164  return AVERROR(EINVAL);
165  }
166  /* Main or 4:2:2 */
168  }
169 
170  if (avctx->level == FF_LEVEL_UNKNOWN) {
171  if (avctx->profile == FF_PROFILE_MPEG2_422) { /* 4:2:2 */
172  if (avctx->width <= 720 && avctx->height <= 608)
173  avctx->level = 5; /* Main */
174  else
175  avctx->level = 2; /* High */
176  } else {
177  if (avctx->profile != FF_PROFILE_MPEG2_HIGH && s->chroma_format != CHROMA_420) {
178  av_log(avctx, AV_LOG_ERROR,
179  "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
180  return AVERROR(EINVAL);
181  }
182  if (avctx->width <= 720 && avctx->height <= 576)
183  avctx->level = 8; /* Main */
184  else if (avctx->width <= 1440)
185  avctx->level = 6; /* High 1440 */
186  else
187  avctx->level = 4; /* High */
188  }
189  }
190 
191  if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
192  av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
193  return AVERROR(EINVAL);
194  }
195 
197  if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
198  av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
199  "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
200  return AVERROR(EINVAL);
201  }
202  }
203 
205  if (s->drop_frame_timecode)
207  if (s->drop_frame_timecode && s->frame_rate_index != 4) {
208  av_log(avctx, AV_LOG_ERROR,
209  "Drop frame time code only allowed with 1001/30000 fps\n");
210  return AVERROR(EINVAL);
211  }
212 
213 #if FF_API_PRIVATE_OPT
215  if (avctx->timecode_frame_start)
218 #endif
219 
220  if (s->tc_opt_str) {
222  int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
223  if (ret < 0)
224  return ret;
226  s->timecode_frame_start = s->tc.start;
227  } else {
228  s->timecode_frame_start = 0; // default is -1
229  }
230 
231  return 0;
232 }
233 
234 static void put_header(MpegEncContext *s, int header)
235 {
237  put_bits(&s->pb, 16, header >> 16);
238  put_sbits(&s->pb, 16, header);
239 }
240 
241 /* put sequence header if needed */
243 {
244  unsigned int vbv_buffer_size, fps, v;
245  int i, constraint_parameter_flag;
246  uint64_t time_code;
247  int64_t best_aspect_error = INT64_MAX;
248  AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
249 
250  if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
251  aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
252 
253  if (s->current_picture.f->key_frame) {
255 
256  /* MPEG-1 header repeated every GOP */
258 
259  put_sbits(&s->pb, 12, s->width & 0xFFF);
260  put_sbits(&s->pb, 12, s->height & 0xFFF);
261 
262  for (i = 1; i < 15; i++) {
263  int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
264  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
265  error -= (1LL<<32) / ff_mpeg1_aspect[i];
266  else
267  error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
268 
269  error = FFABS(error);
270 
271  if (error - 2 <= best_aspect_error) {
272  best_aspect_error = error;
273  s->aspect_ratio_info = i;
274  }
275  }
276 
277  put_bits(&s->pb, 4, s->aspect_ratio_info);
278  put_bits(&s->pb, 4, s->frame_rate_index);
279 
280  if (s->avctx->rc_max_rate) {
281  v = (s->avctx->rc_max_rate + 399) / 400;
282  if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
283  v = 0x3ffff;
284  } else {
285  v = 0x3FFFF;
286  }
287 
288  if (s->avctx->rc_buffer_size)
289  vbv_buffer_size = s->avctx->rc_buffer_size;
290  else
291  /* VBV calculation: Scaled so that a VCD has the proper
292  * VBV size of 40 kilobytes */
293  vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
294  vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
295 
296  put_sbits(&s->pb, 18, v);
297  put_bits(&s->pb, 1, 1); // marker
298  put_sbits(&s->pb, 10, vbv_buffer_size);
299 
300  constraint_parameter_flag =
301  s->width <= 768 &&
302  s->height <= 576 &&
303  s->mb_width * s->mb_height <= 396 &&
304  s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
305  framerate.num <= framerate.den * 30 &&
306  s->avctx->me_range &&
307  s->avctx->me_range < 128 &&
308  vbv_buffer_size <= 20 &&
309  v <= 1856000 / 400 &&
311 
312  put_bits(&s->pb, 1, constraint_parameter_flag);
313 
316 
317  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
318  AVFrameSideData *side_data;
319  int width = s->width;
320  int height = s->height;
321  int use_seq_disp_ext;
322 
324  put_bits(&s->pb, 4, 1); // seq ext
325 
326  put_bits(&s->pb, 1, s->avctx->profile == FF_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
327 
328  put_bits(&s->pb, 3, s->avctx->profile); // profile
329  put_bits(&s->pb, 4, s->avctx->level); // level
330 
331  put_bits(&s->pb, 1, s->progressive_sequence);
332  put_bits(&s->pb, 2, s->chroma_format);
333  put_bits(&s->pb, 2, s->width >> 12);
334  put_bits(&s->pb, 2, s->height >> 12);
335  put_bits(&s->pb, 12, v >> 18); // bitrate ext
336  put_bits(&s->pb, 1, 1); // marker
337  put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
338  put_bits(&s->pb, 1, s->low_delay);
339  put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
340  put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
341 
343  if (side_data) {
344  AVPanScan *pan_scan = (AVPanScan *)side_data->data;
345  if (pan_scan->width && pan_scan->height) {
346  width = pan_scan->width >> 4;
347  height = pan_scan->height >> 4;
348  }
349  }
350 
351  use_seq_disp_ext = (width != s->width ||
352  height != s->height ||
357 
358  if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
360  put_bits(&s->pb, 4, 2); // sequence display extension
361  put_bits(&s->pb, 3, s->video_format); // video_format
362  put_bits(&s->pb, 1, 1); // colour_description
363  put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
364  put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
365  put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
366  put_bits(&s->pb, 14, width); // display_horizontal_size
367  put_bits(&s->pb, 1, 1); // marker_bit
368  put_bits(&s->pb, 14, height); // display_vertical_size
369  put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
370  }
371  }
372 
374  put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
375  /* time code: we must convert from the real frame rate to a
376  * fake MPEG frame rate in case of low frame rate */
377  fps = (framerate.num + framerate.den / 2) / framerate.den;
378  time_code = s->current_picture_ptr->f->coded_picture_number +
380 
382 
384  if (s->drop_frame_timecode)
385  time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
386 
387  put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
388  put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
389  put_bits(&s->pb, 1, 1);
390  put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
391  put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
393  put_bits(&s->pb, 1, 0); // broken link
394  }
395 }
396 
397 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
398 {
399  while (run >= 33) {
400  put_bits(&s->pb, 11, 0x008);
401  run -= 33;
402  }
404  ff_mpeg12_mbAddrIncrTable[run][0]);
405 }
406 
408 {
409  put_bits(&s->pb, 5, s->qscale);
410 }
411 
413 {
414  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
415  put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
416  /* slice_vertical_position_extension */
417  put_bits(&s->pb, 3, s->mb_y >> 7);
418  } else {
420  }
421  put_qscale(s);
422  /* slice extra information */
423  put_bits(&s->pb, 1, 0);
424 }
425 
427 {
428  AVFrameSideData *side_data;
430 
431  /* MPEG-1 picture header */
433  /* temporal reference */
434 
435  // RAL: s->picture_number instead of s->fake_picture_number
436  put_bits(&s->pb, 10,
437  (s->picture_number - s->gop_picture_number) & 0x3ff);
438  put_bits(&s->pb, 3, s->pict_type);
439 
440  s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
441  put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
442 
443  // RAL: Forward f_code also needed for B-frames
444  if (s->pict_type == AV_PICTURE_TYPE_P ||
446  put_bits(&s->pb, 1, 0); /* half pel coordinates */
448  put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
449  else
450  put_bits(&s->pb, 3, 7); /* forward_f_code */
451  }
452 
453  // RAL: Backward f_code necessary for B-frames
454  if (s->pict_type == AV_PICTURE_TYPE_B) {
455  put_bits(&s->pb, 1, 0); /* half pel coordinates */
457  put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
458  else
459  put_bits(&s->pb, 3, 7); /* backward_f_code */
460  }
461 
462  put_bits(&s->pb, 1, 0); /* extra bit picture */
463 
464  s->frame_pred_frame_dct = 1;
465  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
467  put_bits(&s->pb, 4, 8); /* pic ext */
468  if (s->pict_type == AV_PICTURE_TYPE_P ||
470  put_bits(&s->pb, 4, s->f_code);
471  put_bits(&s->pb, 4, s->f_code);
472  } else {
473  put_bits(&s->pb, 8, 255);
474  }
475  if (s->pict_type == AV_PICTURE_TYPE_B) {
476  put_bits(&s->pb, 4, s->b_code);
477  put_bits(&s->pb, 4, s->b_code);
478  } else {
479  put_bits(&s->pb, 8, 255);
480  }
481  put_bits(&s->pb, 2, s->intra_dc_precision);
482 
484  put_bits(&s->pb, 2, s->picture_structure);
485  if (s->progressive_sequence)
486  put_bits(&s->pb, 1, 0); /* no repeat */
487  else
489  /* XXX: optimize the generation of this flag with entropy measures */
491 
492  put_bits(&s->pb, 1, s->frame_pred_frame_dct);
494  put_bits(&s->pb, 1, s->q_scale_type);
495  put_bits(&s->pb, 1, s->intra_vlc_format);
496  put_bits(&s->pb, 1, s->alternate_scan);
497  put_bits(&s->pb, 1, s->repeat_first_field);
499  /* chroma_420_type */
500  put_bits(&s->pb, 1, s->chroma_format ==
501  CHROMA_420 ? s->progressive_frame : 0);
502  put_bits(&s->pb, 1, s->progressive_frame);
503  put_bits(&s->pb, 1, 0); /* composite_display_flag */
504  }
505  if (s->scan_offset) {
506  int i;
507 
509  for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
511  }
514  if (side_data) {
515  AVStereo3D *stereo = (AVStereo3D *)side_data->data;
516  uint8_t fpa_type;
517 
518  switch (stereo->type) {
520  fpa_type = 0x03;
521  break;
523  fpa_type = 0x04;
524  break;
525  case AV_STEREO3D_2D:
526  fpa_type = 0x08;
527  break;
529  fpa_type = 0x23;
530  break;
531  default:
532  fpa_type = 0;
533  break;
534  }
535 
536  if (fpa_type != 0) {
538  put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
539  put_bits(&s->pb, 8, 'P');
540  put_bits(&s->pb, 8, '3');
541  put_bits(&s->pb, 8, 'D');
542  put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
543 
544  put_bits(&s->pb, 1, 1); // reserved_bit
545  put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
546  put_bits(&s->pb, 8, 0x04); // reserved_data[0]
547  put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
548  }
549  }
550 
551  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
554  if (side_data) {
555  if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
556  int i = 0;
557 
559 
560  put_bits(&s->pb, 8, 'G'); // user_identifier
561  put_bits(&s->pb, 8, 'A');
562  put_bits(&s->pb, 8, '9');
563  put_bits(&s->pb, 8, '4');
564  put_bits(&s->pb, 8, 3); // user_data_type_code
565  put_bits(&s->pb, 8,
566  (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
567  put_bits(&s->pb, 8, 0xff); // em_data
568 
569  for (i = 0; i < side_data->size; i++)
570  put_bits(&s->pb, 8, side_data->data[i]);
571 
572  put_bits(&s->pb, 8, 0xff); // marker_bits
573  } else {
575  "Warning Closed Caption size (%d) can not exceed 93 bytes "
576  "and must be a multiple of 3\n", side_data->size);
577  }
578  }
579  }
580 
581  s->mb_y = 0;
583 }
584 
585 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
586  int has_mv, int field_motion)
587 {
588  put_bits(&s->pb, n, bits);
589  if (!s->frame_pred_frame_dct) {
590  if (has_mv)
591  /* motion_type: frame/field */
592  put_bits(&s->pb, 2, 2 - field_motion);
593  put_bits(&s->pb, 1, s->interlaced_dct);
594  }
595 }
596 
597 // RAL: Parameter added: f_or_b_code
598 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
599 {
600  if (val == 0) {
601  /* zero vector */
602  put_bits(&s->pb,
605  } else {
606  int code, sign, bits;
607  int bit_size = f_or_b_code - 1;
608  int range = 1 << bit_size;
609  /* modulo encoding */
610  val = sign_extend(val, 5 + bit_size);
611 
612  if (val >= 0) {
613  val--;
614  code = (val >> bit_size) + 1;
615  bits = val & (range - 1);
616  sign = 0;
617  } else {
618  val = -val;
619  val--;
620  code = (val >> bit_size) + 1;
621  bits = val & (range - 1);
622  sign = 1;
623  }
624 
625  av_assert2(code > 0 && code <= 16);
626 
627  put_bits(&s->pb,
630 
631  put_bits(&s->pb, 1, sign);
632  if (bit_size > 0)
633  put_bits(&s->pb, bit_size, bits);
634  }
635 }
636 
637 static inline void encode_dc(MpegEncContext *s, int diff, int component)
638 {
639  unsigned int diff_u = diff + 255;
640  if (diff_u >= 511) {
641  int index;
642 
643  if (diff < 0) {
644  index = av_log2_16bit(-2 * diff);
645  diff--;
646  } else {
647  index = av_log2_16bit(2 * diff);
648  }
649  if (component == 0)
650  put_bits(&s->pb,
651  ff_mpeg12_vlc_dc_lum_bits[index] + index,
652  (ff_mpeg12_vlc_dc_lum_code[index] << index) +
653  av_mod_uintp2(diff, index));
654  else
655  put_bits(&s->pb,
656  ff_mpeg12_vlc_dc_chroma_bits[index] + index,
657  (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
658  av_mod_uintp2(diff, index));
659  } else {
660  if (component == 0)
661  put_bits(&s->pb,
662  mpeg1_lum_dc_uni[diff + 255] & 0xFF,
663  mpeg1_lum_dc_uni[diff + 255] >> 8);
664  else
665  put_bits(&s->pb,
666  mpeg1_chr_dc_uni[diff + 255] & 0xFF,
667  mpeg1_chr_dc_uni[diff + 255] >> 8);
668  }
669 }
670 
671 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
672 {
673  int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
674  int code, component;
675  const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
676 
677  last_index = s->block_last_index[n];
678 
679  /* DC coef */
680  if (s->mb_intra) {
681  component = (n <= 3 ? 0 : (n & 1) + 1);
682  dc = block[0]; /* overflow is impossible */
683  diff = dc - s->last_dc[component];
684  encode_dc(s, diff, component);
685  s->last_dc[component] = dc;
686  i = 1;
687  if (s->intra_vlc_format)
688  table_vlc = ff_rl_mpeg2.table_vlc;
689  } else {
690  /* encode the first coefficient: needs to be done here because
691  * it is handled slightly differently */
692  level = block[0];
693  if (abs(level) == 1) {
694  code = ((uint32_t)level >> 31); /* the sign bit */
695  put_bits(&s->pb, 2, code | 0x02);
696  i = 1;
697  } else {
698  i = 0;
699  last_non_zero = -1;
700  goto next_coef;
701  }
702  }
703 
704  /* now quantify & encode AC coefs */
705  last_non_zero = i - 1;
706 
707  for (; i <= last_index; i++) {
708  j = s->intra_scantable.permutated[i];
709  level = block[j];
710 
711 next_coef:
712  /* encode using VLC */
713  if (level != 0) {
714  run = i - last_non_zero - 1;
715 
716  alevel = level;
717  MASK_ABS(sign, alevel);
718  sign &= 1;
719 
720  if (alevel <= mpeg1_max_level[0][run]) {
721  code = mpeg1_index_run[0][run] + alevel - 1;
722  /* store the VLC & sign at once */
723  put_bits(&s->pb, table_vlc[code][1] + 1,
724  (table_vlc[code][0] << 1) + sign);
725  } else {
726  /* escape seems to be pretty rare <5% so I do not optimize it */
727  put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
728  /* escape: only clip in this case */
729  put_bits(&s->pb, 6, run);
730  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
731  if (alevel < 128) {
732  put_sbits(&s->pb, 8, level);
733  } else {
734  if (level < 0)
735  put_bits(&s->pb, 16, 0x8001 + level + 255);
736  else
737  put_sbits(&s->pb, 16, level);
738  }
739  } else {
740  put_sbits(&s->pb, 12, level);
741  }
742  }
743  last_non_zero = i;
744  }
745  }
746  /* end of block */
747  put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
748 }
749 
751  int16_t block[8][64],
752  int motion_x, int motion_y,
753  int mb_block_count)
754 {
755  int i, cbp;
756  const int mb_x = s->mb_x;
757  const int mb_y = s->mb_y;
758  const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
759 
760  /* compute cbp */
761  cbp = 0;
762  for (i = 0; i < mb_block_count; i++)
763  if (s->block_last_index[i] >= 0)
764  cbp |= 1 << (mb_block_count - 1 - i);
765 
766  if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
767  (mb_x != s->mb_width - 1 ||
768  (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
769  ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
770  (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
771  (((s->mv_dir & MV_DIR_FORWARD)
772  ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
773  (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
774  ((s->mv_dir & MV_DIR_BACKWARD)
775  ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
776  (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
777  s->mb_skip_run++;
778  s->qscale -= s->dquant;
779  s->skip_count++;
780  s->misc_bits++;
781  s->last_bits++;
782  if (s->pict_type == AV_PICTURE_TYPE_P) {
783  s->last_mv[0][0][0] =
784  s->last_mv[0][0][1] =
785  s->last_mv[0][1][0] =
786  s->last_mv[0][1][1] = 0;
787  }
788  } else {
789  if (first_mb) {
790  av_assert0(s->mb_skip_run == 0);
791  encode_mb_skip_run(s, s->mb_x);
792  } else {
794  }
795 
796  if (s->pict_type == AV_PICTURE_TYPE_I) {
797  if (s->dquant && cbp) {
798  /* macroblock_type: macroblock_quant = 1 */
799  put_mb_modes(s, 2, 1, 0, 0);
800  put_qscale(s);
801  } else {
802  /* macroblock_type: macroblock_quant = 0 */
803  put_mb_modes(s, 1, 1, 0, 0);
804  s->qscale -= s->dquant;
805  }
806  s->misc_bits += get_bits_diff(s);
807  s->i_count++;
808  } else if (s->mb_intra) {
809  if (s->dquant && cbp) {
810  put_mb_modes(s, 6, 0x01, 0, 0);
811  put_qscale(s);
812  } else {
813  put_mb_modes(s, 5, 0x03, 0, 0);
814  s->qscale -= s->dquant;
815  }
816  s->misc_bits += get_bits_diff(s);
817  s->i_count++;
818  memset(s->last_mv, 0, sizeof(s->last_mv));
819  } else if (s->pict_type == AV_PICTURE_TYPE_P) {
820  if (s->mv_type == MV_TYPE_16X16) {
821  if (cbp != 0) {
822  if ((motion_x | motion_y) == 0) {
823  if (s->dquant) {
824  /* macroblock_pattern & quant */
825  put_mb_modes(s, 5, 1, 0, 0);
826  put_qscale(s);
827  } else {
828  /* macroblock_pattern only */
829  put_mb_modes(s, 2, 1, 0, 0);
830  }
831  s->misc_bits += get_bits_diff(s);
832  } else {
833  if (s->dquant) {
834  put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
835  put_qscale(s);
836  } else {
837  put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
838  }
839  s->misc_bits += get_bits_diff(s);
840  // RAL: f_code parameter added
842  motion_x - s->last_mv[0][0][0],
843  s->f_code);
844  // RAL: f_code parameter added
846  motion_y - s->last_mv[0][0][1],
847  s->f_code);
848  s->mv_bits += get_bits_diff(s);
849  }
850  } else {
851  put_bits(&s->pb, 3, 1); /* motion only */
852  if (!s->frame_pred_frame_dct)
853  put_bits(&s->pb, 2, 2); /* motion_type: frame */
854  s->misc_bits += get_bits_diff(s);
855  // RAL: f_code parameter added
857  motion_x - s->last_mv[0][0][0],
858  s->f_code);
859  // RAL: f_code parameter added
861  motion_y - s->last_mv[0][0][1],
862  s->f_code);
863  s->qscale -= s->dquant;
864  s->mv_bits += get_bits_diff(s);
865  }
866  s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
867  s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
868  } else {
870 
871  if (cbp) {
872  if (s->dquant) {
873  put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
874  put_qscale(s);
875  } else {
876  put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
877  }
878  } else {
879  put_bits(&s->pb, 3, 1); /* motion only */
880  put_bits(&s->pb, 2, 1); /* motion_type: field */
881  s->qscale -= s->dquant;
882  }
883  s->misc_bits += get_bits_diff(s);
884  for (i = 0; i < 2; i++) {
885  put_bits(&s->pb, 1, s->field_select[0][i]);
887  s->mv[0][i][0] - s->last_mv[0][i][0],
888  s->f_code);
890  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
891  s->f_code);
892  s->last_mv[0][i][0] = s->mv[0][i][0];
893  s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
894  }
895  s->mv_bits += get_bits_diff(s);
896  }
897  if (cbp) {
898  if (s->chroma_y_shift) {
899  put_bits(&s->pb,
900  ff_mpeg12_mbPatTable[cbp][1],
901  ff_mpeg12_mbPatTable[cbp][0]);
902  } else {
903  put_bits(&s->pb,
904  ff_mpeg12_mbPatTable[cbp >> 2][1],
905  ff_mpeg12_mbPatTable[cbp >> 2][0]);
906  put_sbits(&s->pb, 2, cbp);
907  }
908  }
909  s->f_count++;
910  } else {
911  if (s->mv_type == MV_TYPE_16X16) {
912  if (cbp) { // With coded bloc pattern
913  if (s->dquant) {
914  if (s->mv_dir == MV_DIR_FORWARD)
915  put_mb_modes(s, 6, 3, 1, 0);
916  else
917  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
918  put_qscale(s);
919  } else {
920  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
921  }
922  } else { // No coded bloc pattern
923  put_bits(&s->pb, 5 - s->mv_dir, 2);
924  if (!s->frame_pred_frame_dct)
925  put_bits(&s->pb, 2, 2); /* motion_type: frame */
926  s->qscale -= s->dquant;
927  }
928  s->misc_bits += get_bits_diff(s);
929  if (s->mv_dir & MV_DIR_FORWARD) {
931  s->mv[0][0][0] - s->last_mv[0][0][0],
932  s->f_code);
934  s->mv[0][0][1] - s->last_mv[0][0][1],
935  s->f_code);
936  s->last_mv[0][0][0] =
937  s->last_mv[0][1][0] = s->mv[0][0][0];
938  s->last_mv[0][0][1] =
939  s->last_mv[0][1][1] = s->mv[0][0][1];
940  s->f_count++;
941  }
942  if (s->mv_dir & MV_DIR_BACKWARD) {
944  s->mv[1][0][0] - s->last_mv[1][0][0],
945  s->b_code);
947  s->mv[1][0][1] - s->last_mv[1][0][1],
948  s->b_code);
949  s->last_mv[1][0][0] =
950  s->last_mv[1][1][0] = s->mv[1][0][0];
951  s->last_mv[1][0][1] =
952  s->last_mv[1][1][1] = s->mv[1][0][1];
953  s->b_count++;
954  }
955  } else {
958  if (cbp) { // With coded bloc pattern
959  if (s->dquant) {
960  if (s->mv_dir == MV_DIR_FORWARD)
961  put_mb_modes(s, 6, 3, 1, 1);
962  else
963  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
964  put_qscale(s);
965  } else {
966  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
967  }
968  } else { // No coded bloc pattern
969  put_bits(&s->pb, 5 - s->mv_dir, 2);
970  put_bits(&s->pb, 2, 1); /* motion_type: field */
971  s->qscale -= s->dquant;
972  }
973  s->misc_bits += get_bits_diff(s);
974  if (s->mv_dir & MV_DIR_FORWARD) {
975  for (i = 0; i < 2; i++) {
976  put_bits(&s->pb, 1, s->field_select[0][i]);
978  s->mv[0][i][0] - s->last_mv[0][i][0],
979  s->f_code);
981  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
982  s->f_code);
983  s->last_mv[0][i][0] = s->mv[0][i][0];
984  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
985  }
986  s->f_count++;
987  }
988  if (s->mv_dir & MV_DIR_BACKWARD) {
989  for (i = 0; i < 2; i++) {
990  put_bits(&s->pb, 1, s->field_select[1][i]);
992  s->mv[1][i][0] - s->last_mv[1][i][0],
993  s->b_code);
995  s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
996  s->b_code);
997  s->last_mv[1][i][0] = s->mv[1][i][0];
998  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
999  }
1000  s->b_count++;
1001  }
1002  }
1003  s->mv_bits += get_bits_diff(s);
1004  if (cbp) {
1005  if (s->chroma_y_shift) {
1006  put_bits(&s->pb,
1007  ff_mpeg12_mbPatTable[cbp][1],
1008  ff_mpeg12_mbPatTable[cbp][0]);
1009  } else {
1010  put_bits(&s->pb,
1011  ff_mpeg12_mbPatTable[cbp >> 2][1],
1012  ff_mpeg12_mbPatTable[cbp >> 2][0]);
1013  put_sbits(&s->pb, 2, cbp);
1014  }
1015  }
1016  }
1017  for (i = 0; i < mb_block_count; i++)
1018  if (cbp & (1 << (mb_block_count - 1 - i)))
1019  mpeg1_encode_block(s, block[i], i);
1020  s->mb_skip_run = 0;
1021  if (s->mb_intra)
1022  s->i_tex_bits += get_bits_diff(s);
1023  else
1024  s->p_tex_bits += get_bits_diff(s);
1025  }
1026 }
1027 
1029  int motion_x, int motion_y)
1030 {
1031  if (s->chroma_format == CHROMA_420)
1032  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1033  else
1034  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1035 }
1036 
1038 {
1039  static int done = 0;
1040 
1042 
1043  if (!done) {
1044  int f_code;
1045  int mv;
1046  int i;
1047 
1048  done = 1;
1051 
1052  for (i = 0; i < 64; i++) {
1055  }
1056 
1059 
1060  /* build unified dc encoding tables */
1061  for (i = -255; i < 256; i++) {
1062  int adiff, index;
1063  int bits, code;
1064  int diff = i;
1065 
1066  adiff = FFABS(diff);
1067  if (diff < 0)
1068  diff--;
1069  index = av_log2(2 * adiff);
1070 
1072  code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1073  av_mod_uintp2(diff, index);
1074  mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1075 
1078  av_mod_uintp2(diff, index);
1079  mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1080  }
1081 
1082  for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1083  for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1084  int len;
1085 
1086  if (mv == 0) {
1087  len = ff_mpeg12_mbMotionVectorTable[0][1];
1088  } else {
1089  int val, bit_size, code;
1090 
1091  bit_size = f_code - 1;
1092 
1093  val = mv;
1094  if (val < 0)
1095  val = -val;
1096  val--;
1097  code = (val >> bit_size) + 1;
1098  if (code < 17)
1100  1 + bit_size;
1101  else
1102  len = ff_mpeg12_mbMotionVectorTable[16][1] +
1103  2 + bit_size;
1104  }
1105 
1106  mv_penalty[f_code][mv + MAX_DMV] = len;
1107  }
1108 
1109 
1110  for (f_code = MAX_FCODE; f_code > 0; f_code--)
1111  for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1112  fcode_tab[mv + MAX_MV] = f_code;
1113  }
1114  s->me.mv_penalty = mv_penalty;
1115  s->fcode_tab = fcode_tab;
1116  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1117  s->min_qcoeff = -255;
1118  s->max_qcoeff = 255;
1119  } else {
1120  s->min_qcoeff = -2047;
1121  s->max_qcoeff = 2047;
1122  }
1123  if (s->intra_vlc_format) {
1124  s->intra_ac_vlc_length =
1126  } else {
1127  s->intra_ac_vlc_length =
1129  }
1130  s->inter_ac_vlc_length =
1132 }
1133 
1134 #define OFFSET(x) offsetof(MpegEncContext, x)
1135 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1136 #define COMMON_OPTS \
1137  { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1138  OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1139  { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1140  OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1141  { "drop_frame_timecode", "Timecode is in drop frame format.", \
1142  OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1143  { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1144  OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1145  { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1146  OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1147 
1148 static const AVOption mpeg1_options[] = {
1149  COMMON_OPTS
1151  { NULL },
1152 };
1153 
1154 static const AVOption mpeg2_options[] = {
1155  COMMON_OPTS
1156  { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1157  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1158  { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1159  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1160  { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1161  { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1162  { "video_format", "Video_format in the sequence_display_extension indicating the source of the video.", OFFSET(video_format), AV_OPT_TYPE_INT, { .i64 = VIDEO_FORMAT_UNSPECIFIED }, 0, 7, VE, "video_format" },
1163  { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1164  { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1165  { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1166  { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1167  { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1168  { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1171  { NULL },
1172 };
1173 
1174 #define mpeg12_class(x) \
1175 static const AVClass mpeg ## x ## _class = { \
1176  .class_name = "mpeg" # x "video encoder", \
1177  .item_name = av_default_item_name, \
1178  .option = mpeg ## x ## _options, \
1179  .version = LIBAVUTIL_VERSION_INT, \
1180 };
1181 
1183 mpeg12_class(2)
1184 
1186  .name = "mpeg1video",
1187  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1188  .type = AVMEDIA_TYPE_VIDEO,
1189  .id = AV_CODEC_ID_MPEG1VIDEO,
1190  .priv_data_size = sizeof(MpegEncContext),
1191  .init = encode_init,
1192  .encode2 = ff_mpv_encode_picture,
1193  .close = ff_mpv_encode_end,
1194  .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1195  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1196  AV_PIX_FMT_NONE },
1198  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1199  .priv_class = &mpeg1_class,
1200 };
1201 
1203  .name = "mpeg2video",
1204  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1205  .type = AVMEDIA_TYPE_VIDEO,
1206  .id = AV_CODEC_ID_MPEG2VIDEO,
1207  .priv_data_size = sizeof(MpegEncContext),
1208  .init = encode_init,
1209  .encode2 = ff_mpv_encode_picture,
1210  .close = ff_mpv_encode_end,
1211  .supported_framerates = ff_mpeg2_frame_rate_tab,
1212  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1214  AV_PIX_FMT_NONE },
1216  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1217  .priv_class = &mpeg2_class,
1218 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:1594
av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
Definition: mpeg12enc.c:1037
static uint8_t uni_mpeg1_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:54
#define MASK_ABS(mask, level)
Definition: mathops.h:155
#define NULL
Definition: coverity.c:32
AVCodec ff_mpeg2video_encoder
Definition: mpeg12enc.c:1202
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:463
int aspect_ratio_info
Definition: mpegvideo.h:402
int picture_number
Definition: mpegvideo.h:127
const AVRational ff_mpeg2_frame_rate_tab[]
Definition: mpeg12data.c:308
#define FF_PROFILE_MPEG2_MAIN
Definition: avcodec.h:1892
AVOption.
Definition: opt.h:246
uint8_t * fcode_tab
smallest fcode needed for each MV
Definition: mpegvideo.h:279
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:269
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
Definition: mpegvideo.h:278
static int find_frame_rate_index(MpegEncContext *s)
Definition: mpeg12enc.c:102
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:240
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define VIDEO_FORMAT_COMPONENT
Definition: mpegvideo.h:474
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:154
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define MAX_MV
Definition: motion_est.h:35
int height
Definition: avcodec.h:433
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:616
int num
Numerator.
Definition: rational.h:59
const unsigned char ff_mpeg12_vlc_dc_lum_bits[12]
Definition: mpeg12data.c:55
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:117
enum AVCodecID codec_id
Definition: mpegvideo.h:112
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:48
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:905
int scan_offset
reserve space for SVCD scan offset user data.
Definition: mpegvideo.h:494
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:308
mpegvideo header.
uint8_t permutated[64]
Definition: idctdsp.h:33
const uint16_t ff_mpeg12_vlc_dc_lum_code[12]
Definition: mpeg12data.c:52
Views are next to each other.
Definition: stereo3d.h:67
uint8_t run
Definition: svq3.c:209
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:311
static void error(const char *err)
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:318
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:71
int profile
profile
Definition: avcodec.h:1859
AVCodec.
Definition: codec.h:190
#define MAX_FCODE
Definition: mpegutils.h:48
int framerate
Definition: h264_levels.c:65
uint8_t(* mv_penalty)[MAX_DMV *2+1]
bit amount needed to encode a MV
Definition: motion_est.h:93
int qscale
QP.
Definition: mpegvideo.h:204
RLTable.
Definition: rl.h:39
int field_select[2][2]
Definition: mpegvideo.h:277
Macro definitions for various function/variable attributes.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:649
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:739
static int16_t block[64]
Definition: dct.c:115
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:1983
#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:75
#define VIDEO_FORMAT_NTSC
Definition: mpegvideo.h:476
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
Parse timecode representation (hh:mm:ss[:;.
Definition: timecode.c:194
AVRational mpeg2_frame_rate_ext
Definition: mpegvideo.h:218
uint8_t
#define av_cold
Definition: attributes.h:88
#define VIDEO_FORMAT_PAL
Definition: mpegvideo.h:475
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
static uint32_t mpeg1_lum_dc_uni[512]
Definition: mpeg12enc.c:59
AVOptions.
static void encode_mb_skip_run(MpegEncContext *s, int run)
Definition: mpeg12enc.c:397
RLTable ff_rl_mpeg2
Definition: mpeg12data.c:174
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:176
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
Definition: avcodec.h:997
timecode is drop frame
Definition: timecode.h:36
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:374
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:352
static const AVOption mpeg1_options[]
Definition: mpeg12enc.c:1148
static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12enc.c:671
int interlaced_dct
Definition: mpegvideo.h:491
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:180
#define CHROMA_420
Definition: mpegvideo.h:483
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
#define VIDEO_FORMAT_UNSPECIFIED
Definition: mpegvideo.h:479
AVCodec ff_mpeg1video_encoder
int intra_dc_precision
Definition: mpegvideo.h:464
int repeat_first_field
Definition: mpegvideo.h:480
Structure to hold side data for an AVFrame.
Definition: frame.h:206
#define height
static int8_t mpeg1_max_level[2][64]
Definition: mpeg12enc.c:63
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:46
#define VIDEO_FORMAT_SECAM
Definition: mpegvideo.h:477
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:55
static const uint8_t header[24]
Definition: sdr2.c:67
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:309
int dquant
qscale difference to prev qscale
Definition: mpegvideo.h:210
int gop_picture_number
index of the first picture of a GOP based on fake_pic_num & MPEG-1 specific
Definition: mpegvideo.h:451
#define av_log(a,...)
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:1593
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:755
int intra_only
if true, only intra pictures are generated
Definition: mpegvideo.h:102
#define MAX_DMV
Definition: motion_est.h:37
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:185
static void put_mb_modes(MpegEncContext *s, int n, int bits, int has_mv, int field_motion)
Definition: mpeg12enc.c:585
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:316
int chroma_y_shift
Definition: mpegvideo.h:487
int strict_std_compliance
strictly follow the std (MPEG-4, ...)
Definition: mpegvideo.h:118
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
const uint8_t * code
Definition: spdifenc.c:413
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:58
#define VIDEO_FORMAT_MAC
Definition: mpegvideo.h:478
const uint16_t ff_mpeg12_vlc_dc_chroma_code[12]
Definition: mpeg12data.c:59
static void encode_dc(MpegEncContext *s, int diff, int component)
Definition: mpeg12enc.c:637
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:606
uint8_t * buf
Definition: put_bits.h:38
simple assert() macros that are a bit more flexible than ISO C assert().
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:37
const char * name
Name of the codec implementation.
Definition: codec.h:197
uint8_t bits
Definition: vp3data.h:202
int width
width and height in 1/16 pel
Definition: avcodec.h:432
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:1488
static void mpeg1_encode_sequence_header(MpegEncContext *s)
Definition: mpeg12enc.c:242
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
Definition: mpeg12enc.c:598
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:67
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:356
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:1389
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:312
#define mpeg12_class(x)
Definition: mpeg12enc.c:1174
int intra_vlc_format
Definition: mpegvideo.h:470
#define FF_PROFILE_MPEG2_HIGH
Definition: avcodec.h:1889
int progressive_frame
Definition: mpegvideo.h:489
uint8_t * vbv_delay_ptr
pointer to vbv_delay in the bitstream
Definition: mpegvideo.h:453
const uint16_t(* table_vlc)[2]
Definition: rl.h:42
static uint8_t fcode_tab[MAX_MV *2+1]
Definition: mpeg12enc.c:52
#define width
int width
picture width / height.
Definition: avcodec.h:699
const unsigned char ff_mpeg12_vlc_dc_chroma_bits[12]
Definition: mpeg12data.c:62
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:1860
RLTable ff_rl_mpeg1
Definition: mpeg12data.c:166
int alternate_scan
Definition: mpegvideo.h:471
#define GOP_START_CODE
Definition: mpegvideo.h:69
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:1140
#define FF_PROFILE_MPEG2_422
Definition: avcodec.h:1888
static uint8_t uni_mpeg2_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:55
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
int level
level
Definition: avcodec.h:1982
#define VE
Definition: mpeg12enc.c:1135
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:86
MotionEstContext me
Definition: mpegvideo.h:282
#define EXT_START_CODE
Definition: cavs.h:33
static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
Definition: mpeg12enc.c:67
static void put_header(MpegEncContext *s, int header)
Definition: mpeg12enc.c:234
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
#define av_log2
Definition: intmath.h:83
static const uint8_t svcd_scan_offset_placeholder[]
Definition: mpeg12enc.c:46
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:110
static const int8_t mv[256][2]
Definition: 4xm.c:77
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
int frame_pred_frame_dct
Definition: mpegvideo.h:465
#define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE
timecode is in drop frame format.
Definition: avcodec.h:361
int av_timecode_adjust_ntsc_framenum2(int framenum, int fps)
Adjust frame number for NTSC drop frame time code.
Definition: timecode.c:34
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:263
int coded_picture_number
picture number in bitstream order
Definition: frame.h:414
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:180
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int concealment_motion_vectors
Definition: mpegvideo.h:467
Libavcodec external API header.
Views are on top of each other.
Definition: stereo3d.h:79
char * tc_opt_str
timecode option string
Definition: mpegvideo.h:500
Timecode helpers header.
#define A53_MAX_CC_COUNT
Definition: mpeg12enc.c:65
#define abs(x)
Definition: cuda_runtime.h:35
main external API structure.
Definition: avcodec.h:526
long long int64_t
Definition: coverity.c:34
ScanTable intra_scantable
Definition: mpegvideo.h:91
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
MPEG-1/2 tables.
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s, int16_t block[8][64], int motion_x, int motion_y, int mb_block_count)
Definition: mpeg12enc.c:750
uint8_t * data
Definition: frame.h:208
av_cold int ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: rl.c:39
int ff_mpv_encode_init(AVCodecContext *avctx)
uint8_t * inter_ac_vlc_length
Definition: mpegvideo.h:315
static uint8_t mpeg1_index_run[2][64]
Definition: mpeg12enc.c:62
int progressive_sequence
Definition: mpegvideo.h:456
uint16_t * intra_matrix
custom intra quantization matrix Must be allocated with the av_malloc() family of functions...
Definition: avcodec.h:1026
static uint8_t mv_penalty[MAX_FCODE+1][MAX_DMV *2+1]
Definition: mpeg12enc.c:51
#define FF_MPEG2_PROFILE_OPTS
Definition: profiles.h:46
int index
Definition: gxfenc.c:89
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:1154
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:1147
struct AVFrame * f
Definition: mpegpicture.h:46
#define COMMON_OPTS
Definition: mpeg12enc.c:1136
uint8_t * index_run[2]
encoding only
Definition: rl.h:45
#define OFFSET(x)
Definition: mpeg12enc.c:1134
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: mpeg12enc.c:426
int f_code
forward MV resolution
Definition: mpegvideo.h:238
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
uint16_t * inter_matrix
custom inter quantization matrix Must be allocated with the av_malloc() family of functions...
Definition: avcodec.h:1035
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:107
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> dc
#define av_log2_16bit
Definition: intmath.h:84
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
int last_mv_dir
last mv_dir, used for B-frame encoding
Definition: mpegvideo.h:452
void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64], int motion_x, int motion_y)
Definition: mpeg12enc.c:1028
Pan Scan area.
Definition: avcodec.h:419
uint8_t level
Definition: svq3.c:210
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:276
static av_cold int encode_init(AVCodecContext *avctx)
Definition: mpeg12enc.c:141
MpegEncContext.
Definition: mpegvideo.h:81
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
PutBitContext pb
bit output
Definition: mpegvideo.h:151
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:395
static av_always_inline void put_qscale(MpegEncContext *s)
Definition: mpeg12enc.c:407
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
if(ret< 0)
Definition: vf_mcdeint.c:279
static uint32_t mpeg1_chr_dc_uni[512]
Definition: mpeg12enc.c:60
static const AVOption mpeg2_options[]
Definition: mpeg12enc.c:1154
uint8_t ff_mpeg12_static_rl_table_store[2][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: mpeg12.c:44
int av_nearer_q(AVRational q, AVRational q1, AVRational q2)
Find which of the two rationals is closer to another rational.
Definition: rational.c:127
Bi-dir predicted.
Definition: avutil.h:276
Stereoscopic video.
const uint8_t ff_mpeg12_mbPatTable[64][2]
Definition: mpeg12data.c:221
int den
Denominator.
Definition: rational.h:60
int ff_mpv_encode_end(AVCodecContext *avctx)
void * priv_data
Definition: avcodec.h:553
void ff_mpeg1_encode_slice_header(MpegEncContext *s)
Definition: mpeg12enc.c:412
#define PICT_FRAME
Definition: mpegutils.h:39
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:353
int frame_rate_index
Definition: mpegvideo.h:217
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:461
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:452
int len
#define SEQ_START_CODE
Definition: mpegvideo.h:68
int drop_frame_timecode
timecode is in drop frame format.
Definition: mpegvideo.h:493
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:357
const uint8_t ff_mpeg12_mbAddrIncrTable[36][2]
Definition: mpeg12data.c:182
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:103
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:378
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:613
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
const uint8_t ff_mpeg12_mbMotionVectorTable[17][2]
Definition: mpeg12data.c:288
#define PICTURE_START_CODE
Definition: mpegvideo.h:70
#define av_always_inline
Definition: attributes.h:45
#define AV_CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:343
int b_code
backward MV resolution for B-frames (MPEG-4)
Definition: mpegvideo.h:239
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
AVTimecode tc
timecode context
Definition: mpegvideo.h:501
uint32_t flags
flags such as drop frame, +24 hours support, ...
Definition: timecode.h:43
Stereoscopic 3d metadata.
Definition: frame.h:63
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static double val(void *priv, double ch)
Definition: aeval.c:76
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1589
Predicted.
Definition: avutil.h:275
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:1404
const AVRational ff_mpeg12_frame_rate_tab[]