FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
mpeg12enc.c
Go to the documentation of this file.
1 /*
2  * MPEG1/2 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  * MPEG1/2 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 
45 static const int8_t inv_non_linear_qscale[] = {
46  0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
47  -1,17,-1,18,-1,19, -1, 20, -1, 21, -1, 22, -1,
48  23,-1,24,-1,-1,-1
49 };
50 
52  0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
53  0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
54 };
55 
56 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_MV * 2 + 1];
57 static uint8_t fcode_tab[MAX_MV * 2 + 1];
58 
59 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
60 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
61 
62 /* simple include everything table for dc, first byte is bits
63  * number next 3 are code */
64 static uint32_t mpeg1_lum_dc_uni[512];
65 static uint32_t mpeg1_chr_dc_uni[512];
66 
67 static uint8_t mpeg1_index_run[2][64];
68 static int8_t mpeg1_max_level[2][64];
69 
71 {
72  int i;
73 
74  for (i = 0; i < 128; i++) {
75  int level = i - 64;
76  int run;
77  if (!level)
78  continue;
79  for (run = 0; run < 64; run++) {
80  int len, code;
81  int alevel = FFABS(level);
82 
83  if (alevel > rl->max_level[0][run])
84  code = 111; /* rl->n */
85  else
86  code = rl->index_run[0][run] + alevel - 1;
87 
88  if (code < 111) { /* rl->n */
89  /* length of VLC and sign */
90  len = rl->table_vlc[code][1] + 1;
91  } else {
92  len = rl->table_vlc[111 /* rl->n */][1] + 6;
93 
94  if (alevel < 128)
95  len += 8;
96  else
97  len += 16;
98  }
99 
100  uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
101  }
102  }
103 }
104 
106 {
107  int i;
108  AVRational bestq = (AVRational) {0, 0};
109  AVRational ext;
110  AVRational target = av_inv_q(s->avctx->time_base);
111 
112  for (i = 1; i < 14; i++) {
114  i >= 9)
115  break;
116 
117  for (ext.num=1; ext.num <= 4; ext.num++) {
118  for (ext.den=1; ext.den <= 32; ext.den++) {
120 
121  if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
122  continue;
123  if (av_gcd(ext.den, ext.num) != 1)
124  continue;
125 
126  if ( bestq.num==0
127  || av_nearer_q(target, bestq, q) < 0
128  || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
129  bestq = q;
130  s->frame_rate_index = i;
131  s->mpeg2_frame_rate_ext.num = ext.num;
132  s->mpeg2_frame_rate_ext.den = ext.den;
133  }
134  }
135  }
136  }
137 
138  if (av_cmp_q(target, bestq))
139  return -1;
140  else
141  return 0;
142 }
143 
145 {
146  MpegEncContext *s = avctx->priv_data;
147 
148  if (avctx->codec_id == AV_CODEC_ID_MPEG1VIDEO && avctx->height > 2800)
149  avctx->thread_count = 1;
150 
151  if (ff_mpv_encode_init(avctx) < 0)
152  return -1;
153 
154  if (find_frame_rate_index(s) < 0) {
156  av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
157  avctx->time_base.den, avctx->time_base.num);
158  return -1;
159  } else {
160  av_log(avctx, AV_LOG_INFO,
161  "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
162  avctx->time_base.den, avctx->time_base.num);
163  }
164  }
165 
166  if (avctx->profile == FF_PROFILE_UNKNOWN) {
167  if (avctx->level != FF_LEVEL_UNKNOWN) {
168  av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
169  return -1;
170  }
171  /* Main or 4:2:2 */
172  avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
173  }
174 
175  if (avctx->level == FF_LEVEL_UNKNOWN) {
176  if (avctx->profile == 0) { /* 4:2:2 */
177  if (avctx->width <= 720 && avctx->height <= 608)
178  avctx->level = 5; /* Main */
179  else
180  avctx->level = 2; /* High */
181  } else {
182  if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
183  av_log(avctx, AV_LOG_ERROR,
184  "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
185  return -1;
186  }
187  if (avctx->width <= 720 && avctx->height <= 576)
188  avctx->level = 8; /* Main */
189  else if (avctx->width <= 1440)
190  avctx->level = 6; /* High 1440 */
191  else
192  avctx->level = 4; /* High */
193  }
194  }
195 
196  if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
197  av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
198  return AVERROR(EINVAL);
199  }
200 
202  if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
203  av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
204  "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
205  return AVERROR(EINVAL);
206  }
207  }
208 
210  if (s->drop_frame_timecode)
212  if (s->drop_frame_timecode && s->frame_rate_index != 4) {
213  av_log(avctx, AV_LOG_ERROR,
214  "Drop frame time code only allowed with 1001/30000 fps\n");
215  return -1;
216  }
217 
218  if (s->tc_opt_str) {
220  int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
221  if (ret < 0)
222  return ret;
225  } else {
226  s->avctx->timecode_frame_start = 0; // default is -1
227  }
228  return 0;
229 }
230 
231 static void put_header(MpegEncContext *s, int header)
232 {
234  put_bits(&s->pb, 16, header >> 16);
235  put_sbits(&s->pb, 16, header);
236 }
237 
238 /* put sequence header if needed */
240 {
241  unsigned int vbv_buffer_size, fps, v;
242  int i, constraint_parameter_flag;
243  uint64_t time_code;
244  int64_t best_aspect_error = INT64_MAX;
245  AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
246 
247  if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
248  aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
249 
250  if (s->current_picture.f->key_frame) {
252 
253  /* mpeg1 header repeated every gop */
255 
256  put_sbits(&s->pb, 12, s->width & 0xFFF);
257  put_sbits(&s->pb, 12, s->height & 0xFFF);
258 
259  for (i = 1; i < 15; i++) {
260  int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
261  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
262  error -= (1LL<<32) / ff_mpeg1_aspect[i];
263  else
264  error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
265 
266  error = FFABS(error);
267 
268  if (error - 2 <= best_aspect_error) {
269  best_aspect_error = error;
270  s->aspect_ratio_info = i;
271  }
272  }
273 
274  put_bits(&s->pb, 4, s->aspect_ratio_info);
275  put_bits(&s->pb, 4, s->frame_rate_index);
276 
277  if (s->avctx->rc_max_rate) {
278  v = (s->avctx->rc_max_rate + 399) / 400;
279  if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
280  v = 0x3ffff;
281  } else {
282  v = 0x3FFFF;
283  }
284 
285  if (s->avctx->rc_buffer_size)
286  vbv_buffer_size = s->avctx->rc_buffer_size;
287  else
288  /* VBV calculation: Scaled so that a VCD has the proper
289  * VBV size of 40 kilobytes */
290  vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
291  vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
292 
293  put_sbits(&s->pb, 18, v);
294  put_bits(&s->pb, 1, 1); // marker
295  put_sbits(&s->pb, 10, vbv_buffer_size);
296 
297  constraint_parameter_flag =
298  s->width <= 768 &&
299  s->height <= 576 &&
300  s->mb_width * s->mb_height <= 396 &&
301  s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
302  framerate.num <= framerate.den * 30 &&
303  s->avctx->me_range &&
304  s->avctx->me_range < 128 &&
305  vbv_buffer_size <= 20 &&
306  v <= 1856000 / 400 &&
308 
309  put_bits(&s->pb, 1, constraint_parameter_flag);
310 
313 
314  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
315  AVFrameSideData *side_data;
316  int width = s->width;
317  int height = s->height;
318  int use_seq_disp_ext;
319 
321  put_bits(&s->pb, 4, 1); // seq ext
322 
323  put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
324 
325  put_bits(&s->pb, 3, s->avctx->profile); // profile
326  put_bits(&s->pb, 4, s->avctx->level); // level
327 
328  put_bits(&s->pb, 1, s->progressive_sequence);
329  put_bits(&s->pb, 2, s->chroma_format);
330  put_bits(&s->pb, 2, s->width >> 12);
331  put_bits(&s->pb, 2, s->height >> 12);
332  put_bits(&s->pb, 12, v >> 18); // bitrate ext
333  put_bits(&s->pb, 1, 1); // marker
334  put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
335  put_bits(&s->pb, 1, s->low_delay);
336  put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
337  put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
338 
340  if (side_data) {
341  AVPanScan *pan_scan = (AVPanScan *)side_data->data;
342  if (pan_scan->width && pan_scan->height) {
343  width = pan_scan->width >> 4;
344  height = pan_scan->height >> 4;
345  }
346  }
347 
348  use_seq_disp_ext = (width != s->width ||
349  height != s->height ||
353 
354  if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
356  put_bits(&s->pb, 4, 2); // sequence display extension
357  put_bits(&s->pb, 3, 0); // video_format: 0 is components
358  put_bits(&s->pb, 1, 1); // colour_description
359  put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
360  put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
361  put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
362  put_bits(&s->pb, 14, width); // display_horizontal_size
363  put_bits(&s->pb, 1, 1); // marker_bit
364  put_bits(&s->pb, 14, height); // display_vertical_size
365  put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
366  }
367  }
368 
370  put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
371  /* time code: we must convert from the real frame rate to a
372  * fake MPEG frame rate in case of low frame rate */
373  fps = (framerate.num + framerate.den / 2) / framerate.den;
374  time_code = s->current_picture_ptr->f->coded_picture_number +
376 
378 
380  if (s->drop_frame_timecode)
381  time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
382 
383  put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
384  put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
385  put_bits(&s->pb, 1, 1);
386  put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
387  put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
389  put_bits(&s->pb, 1, 0); // broken link
390  }
391 }
392 
393 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
394 {
395  while (run >= 33) {
396  put_bits(&s->pb, 11, 0x008);
397  run -= 33;
398  }
400  ff_mpeg12_mbAddrIncrTable[run][0]);
401 }
402 
404 {
405  if (s->q_scale_type) {
406  int qp = inv_non_linear_qscale[s->qscale];
407  av_assert2(s->qscale >= 1 && qp > 0);
408  put_bits(&s->pb, 5, qp);
409  } else {
410  put_bits(&s->pb, 5, s->qscale);
411  }
412 }
413 
415 {
416  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
417  put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
418  /* slice_vertical_position_extension */
419  put_bits(&s->pb, 3, s->mb_y >> 7);
420  } else {
422  }
423  put_qscale(s);
424  /* slice extra information */
425  put_bits(&s->pb, 1, 0);
426 }
427 
429 {
430  AVFrameSideData *side_data;
432 
433  /* mpeg1 picture header */
435  /* temporal reference */
436 
437  // RAL: s->picture_number instead of s->fake_picture_number
438  put_bits(&s->pb, 10,
439  (s->picture_number - s->gop_picture_number) & 0x3ff);
440  put_bits(&s->pb, 3, s->pict_type);
441 
442  s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
443  put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
444 
445  // RAL: Forward f_code also needed for B-frames
446  if (s->pict_type == AV_PICTURE_TYPE_P ||
448  put_bits(&s->pb, 1, 0); /* half pel coordinates */
450  put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
451  else
452  put_bits(&s->pb, 3, 7); /* forward_f_code */
453  }
454 
455  // RAL: Backward f_code necessary for B-frames
456  if (s->pict_type == AV_PICTURE_TYPE_B) {
457  put_bits(&s->pb, 1, 0); /* half pel coordinates */
459  put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
460  else
461  put_bits(&s->pb, 3, 7); /* backward_f_code */
462  }
463 
464  put_bits(&s->pb, 1, 0); /* extra bit picture */
465 
466  s->frame_pred_frame_dct = 1;
467  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
469  put_bits(&s->pb, 4, 8); /* pic ext */
470  if (s->pict_type == AV_PICTURE_TYPE_P ||
472  put_bits(&s->pb, 4, s->f_code);
473  put_bits(&s->pb, 4, s->f_code);
474  } else {
475  put_bits(&s->pb, 8, 255);
476  }
477  if (s->pict_type == AV_PICTURE_TYPE_B) {
478  put_bits(&s->pb, 4, s->b_code);
479  put_bits(&s->pb, 4, s->b_code);
480  } else {
481  put_bits(&s->pb, 8, 255);
482  }
483  put_bits(&s->pb, 2, s->intra_dc_precision);
484 
486  put_bits(&s->pb, 2, s->picture_structure);
487  if (s->progressive_sequence)
488  put_bits(&s->pb, 1, 0); /* no repeat */
489  else
491  /* XXX: optimize the generation of this flag with entropy measures */
493 
494  put_bits(&s->pb, 1, s->frame_pred_frame_dct);
496  put_bits(&s->pb, 1, s->q_scale_type);
497  put_bits(&s->pb, 1, s->intra_vlc_format);
498  put_bits(&s->pb, 1, s->alternate_scan);
499  put_bits(&s->pb, 1, s->repeat_first_field);
501  /* chroma_420_type */
502  put_bits(&s->pb, 1, s->chroma_format ==
503  CHROMA_420 ? s->progressive_frame : 0);
504  put_bits(&s->pb, 1, s->progressive_frame);
505  put_bits(&s->pb, 1, 0); /* composite_display_flag */
506  }
507  if (s->scan_offset) {
508  int i;
509 
511  for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
513  }
516  if (side_data) {
517  AVStereo3D *stereo = (AVStereo3D *)side_data->data;
518  uint8_t fpa_type;
519 
520  switch (stereo->type) {
522  fpa_type = 0x03;
523  break;
525  fpa_type = 0x04;
526  break;
527  case AV_STEREO3D_2D:
528  fpa_type = 0x08;
529  break;
531  fpa_type = 0x23;
532  break;
533  default:
534  fpa_type = 0;
535  break;
536  }
537 
538  if (fpa_type != 0) {
540  put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
541  put_bits(&s->pb, 8, 'P');
542  put_bits(&s->pb, 8, '3');
543  put_bits(&s->pb, 8, 'D');
544  put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
545 
546  put_bits(&s->pb, 1, 1); // reserved_bit
547  put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
548  put_bits(&s->pb, 8, 0x04); // reserved_data[0]
549  put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
550  }
551  }
552 
553  s->mb_y = 0;
555 }
556 
557 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
558  int has_mv, int field_motion)
559 {
560  put_bits(&s->pb, n, bits);
561  if (!s->frame_pred_frame_dct) {
562  if (has_mv)
563  /* motion_type: frame/field */
564  put_bits(&s->pb, 2, 2 - field_motion);
565  put_bits(&s->pb, 1, s->interlaced_dct);
566  }
567 }
568 
569 // RAL: Parameter added: f_or_b_code
570 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
571 {
572  if (val == 0) {
573  /* zero vector */
574  put_bits(&s->pb,
577  } else {
578  int code, sign, bits;
579  int bit_size = f_or_b_code - 1;
580  int range = 1 << bit_size;
581  /* modulo encoding */
582  val = sign_extend(val, 5 + bit_size);
583 
584  if (val >= 0) {
585  val--;
586  code = (val >> bit_size) + 1;
587  bits = val & (range - 1);
588  sign = 0;
589  } else {
590  val = -val;
591  val--;
592  code = (val >> bit_size) + 1;
593  bits = val & (range - 1);
594  sign = 1;
595  }
596 
597  av_assert2(code > 0 && code <= 16);
598 
599  put_bits(&s->pb,
602 
603  put_bits(&s->pb, 1, sign);
604  if (bit_size > 0)
605  put_bits(&s->pb, bit_size, bits);
606  }
607 }
608 
609 static inline void encode_dc(MpegEncContext *s, int diff, int component)
610 {
611  unsigned int diff_u = diff + 255;
612  if (diff_u >= 511) {
613  int index;
614 
615  if (diff < 0) {
616  index = av_log2_16bit(-2 * diff);
617  diff--;
618  } else {
619  index = av_log2_16bit(2 * diff);
620  }
621  if (component == 0)
622  put_bits(&s->pb,
623  ff_mpeg12_vlc_dc_lum_bits[index] + index,
624  (ff_mpeg12_vlc_dc_lum_code[index] << index) +
625  av_mod_uintp2(diff, index));
626  else
627  put_bits(&s->pb,
628  ff_mpeg12_vlc_dc_chroma_bits[index] + index,
629  (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
630  av_mod_uintp2(diff, index));
631  } else {
632  if (component == 0)
633  put_bits(&s->pb,
634  mpeg1_lum_dc_uni[diff + 255] & 0xFF,
635  mpeg1_lum_dc_uni[diff + 255] >> 8);
636  else
637  put_bits(&s->pb,
638  mpeg1_chr_dc_uni[diff + 255] & 0xFF,
639  mpeg1_chr_dc_uni[diff + 255] >> 8);
640  }
641 }
642 
643 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
644 {
645  int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
646  int code, component;
647  const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
648 
649  last_index = s->block_last_index[n];
650 
651  /* DC coef */
652  if (s->mb_intra) {
653  component = (n <= 3 ? 0 : (n & 1) + 1);
654  dc = block[0]; /* overflow is impossible */
655  diff = dc - s->last_dc[component];
656  encode_dc(s, diff, component);
657  s->last_dc[component] = dc;
658  i = 1;
659  if (s->intra_vlc_format)
660  table_vlc = ff_rl_mpeg2.table_vlc;
661  } else {
662  /* encode the first coefficient: needs to be done here because
663  * it is handled slightly differently */
664  level = block[0];
665  if (abs(level) == 1) {
666  code = ((uint32_t)level >> 31); /* the sign bit */
667  put_bits(&s->pb, 2, code | 0x02);
668  i = 1;
669  } else {
670  i = 0;
671  last_non_zero = -1;
672  goto next_coef;
673  }
674  }
675 
676  /* now quantify & encode AC coefs */
677  last_non_zero = i - 1;
678 
679  for (; i <= last_index; i++) {
680  j = s->intra_scantable.permutated[i];
681  level = block[j];
682 
683 next_coef:
684  /* encode using VLC */
685  if (level != 0) {
686  run = i - last_non_zero - 1;
687 
688  alevel = level;
689  MASK_ABS(sign, alevel);
690  sign &= 1;
691 
692  if (alevel <= mpeg1_max_level[0][run]) {
693  code = mpeg1_index_run[0][run] + alevel - 1;
694  /* store the VLC & sign at once */
695  put_bits(&s->pb, table_vlc[code][1] + 1,
696  (table_vlc[code][0] << 1) + sign);
697  } else {
698  /* escape seems to be pretty rare <5% so I do not optimize it */
699  put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
700  /* escape: only clip in this case */
701  put_bits(&s->pb, 6, run);
702  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
703  if (alevel < 128) {
704  put_sbits(&s->pb, 8, level);
705  } else {
706  if (level < 0)
707  put_bits(&s->pb, 16, 0x8001 + level + 255);
708  else
709  put_sbits(&s->pb, 16, level);
710  }
711  } else {
712  put_sbits(&s->pb, 12, level);
713  }
714  }
715  last_non_zero = i;
716  }
717  }
718  /* end of block */
719  put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
720 }
721 
723  int16_t block[8][64],
724  int motion_x, int motion_y,
725  int mb_block_count)
726 {
727  int i, cbp;
728  const int mb_x = s->mb_x;
729  const int mb_y = s->mb_y;
730  const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
731 
732  /* compute cbp */
733  cbp = 0;
734  for (i = 0; i < mb_block_count; i++)
735  if (s->block_last_index[i] >= 0)
736  cbp |= 1 << (mb_block_count - 1 - i);
737 
738  if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
739  (mb_x != s->mb_width - 1 ||
740  (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
741  ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
742  (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
743  (((s->mv_dir & MV_DIR_FORWARD)
744  ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
745  (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
746  ((s->mv_dir & MV_DIR_BACKWARD)
747  ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
748  (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
749  s->mb_skip_run++;
750  s->qscale -= s->dquant;
751  s->skip_count++;
752  s->misc_bits++;
753  s->last_bits++;
754  if (s->pict_type == AV_PICTURE_TYPE_P) {
755  s->last_mv[0][0][0] =
756  s->last_mv[0][0][1] =
757  s->last_mv[0][1][0] =
758  s->last_mv[0][1][1] = 0;
759  }
760  } else {
761  if (first_mb) {
762  av_assert0(s->mb_skip_run == 0);
763  encode_mb_skip_run(s, s->mb_x);
764  } else {
766  }
767 
768  if (s->pict_type == AV_PICTURE_TYPE_I) {
769  if (s->dquant && cbp) {
770  /* macroblock_type: macroblock_quant = 1 */
771  put_mb_modes(s, 2, 1, 0, 0);
772  put_qscale(s);
773  } else {
774  /* macroblock_type: macroblock_quant = 0 */
775  put_mb_modes(s, 1, 1, 0, 0);
776  s->qscale -= s->dquant;
777  }
778  s->misc_bits += get_bits_diff(s);
779  s->i_count++;
780  } else if (s->mb_intra) {
781  if (s->dquant && cbp) {
782  put_mb_modes(s, 6, 0x01, 0, 0);
783  put_qscale(s);
784  } else {
785  put_mb_modes(s, 5, 0x03, 0, 0);
786  s->qscale -= s->dquant;
787  }
788  s->misc_bits += get_bits_diff(s);
789  s->i_count++;
790  memset(s->last_mv, 0, sizeof(s->last_mv));
791  } else if (s->pict_type == AV_PICTURE_TYPE_P) {
792  if (s->mv_type == MV_TYPE_16X16) {
793  if (cbp != 0) {
794  if ((motion_x | motion_y) == 0) {
795  if (s->dquant) {
796  /* macroblock_pattern & quant */
797  put_mb_modes(s, 5, 1, 0, 0);
798  put_qscale(s);
799  } else {
800  /* macroblock_pattern only */
801  put_mb_modes(s, 2, 1, 0, 0);
802  }
803  s->misc_bits += get_bits_diff(s);
804  } else {
805  if (s->dquant) {
806  put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
807  put_qscale(s);
808  } else {
809  put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
810  }
811  s->misc_bits += get_bits_diff(s);
812  // RAL: f_code parameter added
814  motion_x - s->last_mv[0][0][0],
815  s->f_code);
816  // RAL: f_code parameter added
818  motion_y - s->last_mv[0][0][1],
819  s->f_code);
820  s->mv_bits += get_bits_diff(s);
821  }
822  } else {
823  put_bits(&s->pb, 3, 1); /* motion only */
824  if (!s->frame_pred_frame_dct)
825  put_bits(&s->pb, 2, 2); /* motion_type: frame */
826  s->misc_bits += get_bits_diff(s);
827  // RAL: f_code parameter added
829  motion_x - s->last_mv[0][0][0],
830  s->f_code);
831  // RAL: f_code parameter added
833  motion_y - s->last_mv[0][0][1],
834  s->f_code);
835  s->qscale -= s->dquant;
836  s->mv_bits += get_bits_diff(s);
837  }
838  s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
839  s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
840  } else {
842 
843  if (cbp) {
844  if (s->dquant) {
845  put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
846  put_qscale(s);
847  } else {
848  put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
849  }
850  } else {
851  put_bits(&s->pb, 3, 1); /* motion only */
852  put_bits(&s->pb, 2, 1); /* motion_type: field */
853  s->qscale -= s->dquant;
854  }
855  s->misc_bits += get_bits_diff(s);
856  for (i = 0; i < 2; i++) {
857  put_bits(&s->pb, 1, s->field_select[0][i]);
859  s->mv[0][i][0] - s->last_mv[0][i][0],
860  s->f_code);
862  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
863  s->f_code);
864  s->last_mv[0][i][0] = s->mv[0][i][0];
865  s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
866  }
867  s->mv_bits += get_bits_diff(s);
868  }
869  if (cbp) {
870  if (s->chroma_y_shift) {
871  put_bits(&s->pb,
872  ff_mpeg12_mbPatTable[cbp][1],
873  ff_mpeg12_mbPatTable[cbp][0]);
874  } else {
875  put_bits(&s->pb,
876  ff_mpeg12_mbPatTable[cbp >> 2][1],
877  ff_mpeg12_mbPatTable[cbp >> 2][0]);
878  put_sbits(&s->pb, 2, cbp);
879  }
880  }
881  s->f_count++;
882  } else {
883  if (s->mv_type == MV_TYPE_16X16) {
884  if (cbp) { // With coded bloc pattern
885  if (s->dquant) {
886  if (s->mv_dir == MV_DIR_FORWARD)
887  put_mb_modes(s, 6, 3, 1, 0);
888  else
889  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
890  put_qscale(s);
891  } else {
892  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
893  }
894  } else { // No coded bloc pattern
895  put_bits(&s->pb, 5 - s->mv_dir, 2);
896  if (!s->frame_pred_frame_dct)
897  put_bits(&s->pb, 2, 2); /* motion_type: frame */
898  s->qscale -= s->dquant;
899  }
900  s->misc_bits += get_bits_diff(s);
901  if (s->mv_dir & MV_DIR_FORWARD) {
903  s->mv[0][0][0] - s->last_mv[0][0][0],
904  s->f_code);
906  s->mv[0][0][1] - s->last_mv[0][0][1],
907  s->f_code);
908  s->last_mv[0][0][0] =
909  s->last_mv[0][1][0] = s->mv[0][0][0];
910  s->last_mv[0][0][1] =
911  s->last_mv[0][1][1] = s->mv[0][0][1];
912  s->f_count++;
913  }
914  if (s->mv_dir & MV_DIR_BACKWARD) {
916  s->mv[1][0][0] - s->last_mv[1][0][0],
917  s->b_code);
919  s->mv[1][0][1] - s->last_mv[1][0][1],
920  s->b_code);
921  s->last_mv[1][0][0] =
922  s->last_mv[1][1][0] = s->mv[1][0][0];
923  s->last_mv[1][0][1] =
924  s->last_mv[1][1][1] = s->mv[1][0][1];
925  s->b_count++;
926  }
927  } else {
930  if (cbp) { // With coded bloc pattern
931  if (s->dquant) {
932  if (s->mv_dir == MV_DIR_FORWARD)
933  put_mb_modes(s, 6, 3, 1, 1);
934  else
935  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
936  put_qscale(s);
937  } else {
938  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
939  }
940  } else { // No coded bloc pattern
941  put_bits(&s->pb, 5 - s->mv_dir, 2);
942  put_bits(&s->pb, 2, 1); /* motion_type: field */
943  s->qscale -= s->dquant;
944  }
945  s->misc_bits += get_bits_diff(s);
946  if (s->mv_dir & MV_DIR_FORWARD) {
947  for (i = 0; i < 2; i++) {
948  put_bits(&s->pb, 1, s->field_select[0][i]);
950  s->mv[0][i][0] - s->last_mv[0][i][0],
951  s->f_code);
953  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
954  s->f_code);
955  s->last_mv[0][i][0] = s->mv[0][i][0];
956  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
957  }
958  s->f_count++;
959  }
960  if (s->mv_dir & MV_DIR_BACKWARD) {
961  for (i = 0; i < 2; i++) {
962  put_bits(&s->pb, 1, s->field_select[1][i]);
964  s->mv[1][i][0] - s->last_mv[1][i][0],
965  s->b_code);
967  s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
968  s->b_code);
969  s->last_mv[1][i][0] = s->mv[1][i][0];
970  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
971  }
972  s->b_count++;
973  }
974  }
975  s->mv_bits += get_bits_diff(s);
976  if (cbp) {
977  if (s->chroma_y_shift) {
978  put_bits(&s->pb,
979  ff_mpeg12_mbPatTable[cbp][1],
980  ff_mpeg12_mbPatTable[cbp][0]);
981  } else {
982  put_bits(&s->pb,
983  ff_mpeg12_mbPatTable[cbp >> 2][1],
984  ff_mpeg12_mbPatTable[cbp >> 2][0]);
985  put_sbits(&s->pb, 2, cbp);
986  }
987  }
988  }
989  for (i = 0; i < mb_block_count; i++)
990  if (cbp & (1 << (mb_block_count - 1 - i)))
991  mpeg1_encode_block(s, block[i], i);
992  s->mb_skip_run = 0;
993  if (s->mb_intra)
994  s->i_tex_bits += get_bits_diff(s);
995  else
996  s->p_tex_bits += get_bits_diff(s);
997  }
998 }
999 
1001  int motion_x, int motion_y)
1002 {
1003  if (s->chroma_format == CHROMA_420)
1004  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1005  else
1006  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1007 }
1008 
1010 {
1011  static int done = 0;
1012 
1014 
1015  if (!done) {
1016  int f_code;
1017  int mv;
1018  int i;
1019 
1020  done = 1;
1023 
1024  for (i = 0; i < 64; i++) {
1025  mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1026  mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1027  }
1028 
1030  if (s->intra_vlc_format)
1032 
1033  /* build unified dc encoding tables */
1034  for (i = -255; i < 256; i++) {
1035  int adiff, index;
1036  int bits, code;
1037  int diff = i;
1038 
1039  adiff = FFABS(diff);
1040  if (diff < 0)
1041  diff--;
1042  index = av_log2(2 * adiff);
1043 
1045  code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1046  av_mod_uintp2(diff, index);
1047  mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1048 
1051  av_mod_uintp2(diff, index);
1052  mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1053  }
1054 
1055  for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1056  for (mv = -MAX_MV; mv <= MAX_MV; mv++) {
1057  int len;
1058 
1059  if (mv == 0) {
1060  len = ff_mpeg12_mbMotionVectorTable[0][1];
1061  } else {
1062  int val, bit_size, code;
1063 
1064  bit_size = f_code - 1;
1065 
1066  val = mv;
1067  if (val < 0)
1068  val = -val;
1069  val--;
1070  code = (val >> bit_size) + 1;
1071  if (code < 17)
1072  len = ff_mpeg12_mbMotionVectorTable[code][1] +
1073  1 + bit_size;
1074  else
1075  len = ff_mpeg12_mbMotionVectorTable[16][1] +
1076  2 + bit_size;
1077  }
1078 
1079  mv_penalty[f_code][mv + MAX_MV] = len;
1080  }
1081 
1082 
1083  for (f_code = MAX_FCODE; f_code > 0; f_code--)
1084  for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1085  fcode_tab[mv + MAX_MV] = f_code;
1086  }
1087  s->me.mv_penalty = mv_penalty;
1088  s->fcode_tab = fcode_tab;
1089  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1090  s->min_qcoeff = -255;
1091  s->max_qcoeff = 255;
1092  } else {
1093  s->min_qcoeff = -2047;
1094  s->max_qcoeff = 2047;
1095  }
1096  if (s->intra_vlc_format) {
1097  s->intra_ac_vlc_length =
1099  } else {
1100  s->intra_ac_vlc_length =
1102  }
1103  s->inter_ac_vlc_length =
1105 }
1106 
1107 #define OFFSET(x) offsetof(MpegEncContext, x)
1108 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1109 #define COMMON_OPTS \
1110  { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1111  OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1112  { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1113  OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1114  { "drop_frame_timecode", "Timecode is in drop frame format.", \
1115  OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1116  { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1117  OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1118 
1119 static const AVOption mpeg1_options[] = {
1120  COMMON_OPTS
1122  { NULL },
1123 };
1124 
1125 static const AVOption mpeg2_options[] = {
1126  COMMON_OPTS
1127  { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1128  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1129  { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1130  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1131  { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1132  { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1134  { NULL },
1135 };
1136 
1137 #define mpeg12_class(x) \
1138 static const AVClass mpeg ## x ## _class = { \
1139  .class_name = "mpeg" # x "video encoder", \
1140  .item_name = av_default_item_name, \
1141  .option = mpeg ## x ## _options, \
1142  .version = LIBAVUTIL_VERSION_INT, \
1143 };
1144 
1146 mpeg12_class(2)
1147 
1148 AVCodec ff_mpeg1video_encoder = {
1149  .name = "mpeg1video",
1150  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1151  .type = AVMEDIA_TYPE_VIDEO,
1152  .id = AV_CODEC_ID_MPEG1VIDEO,
1153  .priv_data_size = sizeof(MpegEncContext),
1154  .init = encode_init,
1155  .encode2 = ff_mpv_encode_picture,
1156  .close = ff_mpv_encode_end,
1157  .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1158  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1159  AV_PIX_FMT_NONE },
1161  .priv_class = &mpeg1_class,
1162 };
1163 
1165  .name = "mpeg2video",
1166  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1167  .type = AVMEDIA_TYPE_VIDEO,
1168  .id = AV_CODEC_ID_MPEG2VIDEO,
1169  .priv_data_size = sizeof(MpegEncContext),
1170  .init = encode_init,
1171  .encode2 = ff_mpv_encode_picture,
1172  .close = ff_mpv_encode_end,
1173  .supported_framerates = ff_mpeg2_frame_rate_tab,
1174  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1176  AV_PIX_FMT_NONE },
1178  .priv_class = &mpeg2_class,
1179 };
av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
Definition: mpeg12enc.c:1009
static uint8_t uni_mpeg1_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:59
#define MASK_ABS(mask, level)
Definition: mathops.h:164
#define NULL
Definition: coverity.c:32
AVCodec ff_mpeg2video_encoder
Definition: mpeg12enc.c:1164
const char const char void * val
Definition: avisynth_c.h:634
float v
int aspect_ratio_info
Definition: mpegvideo.h:407
int picture_number
Definition: mpegvideo.h:134
const char * s
Definition: avisynth_c.h:631
const AVRational ff_mpeg2_frame_rate_tab[]
Definition: mpeg12data.c:328
AVOption.
Definition: opt.h:255
uint8_t * fcode_tab
smallest fcode needed for each MV
Definition: mpegvideo.h:287
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:277
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG1 & B-frame MPEG4
Definition: mpegvideo.h:286
static int find_frame_rate_index(MpegEncContext *s)
Definition: mpeg12enc.c:105
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:192
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:167
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:87
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:161
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define MAX_MV
Definition: motion_est.h:32
int height
Definition: avcodec.h:1183
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:573
static const int8_t inv_non_linear_qscale[]
Definition: mpeg12enc.c:45
int num
numerator
Definition: rational.h:44
const unsigned char ff_mpeg12_vlc_dc_lum_bits[12]
Definition: mpeg12data.c:55
enum AVCodecID codec_id
Definition: mpegvideo.h:119
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:1901
int scan_offset
reserve space for SVCD scan offset user data.
Definition: mpegvideo.h:487
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:66
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:315
mpegvideo header.
uint8_t permutated[64]
Definition: idctdsp.h:31
const uint16_t ff_mpeg12_vlc_dc_lum_code[12]
Definition: mpeg12data.c:52
uint8_t run
Definition: svq3.c:149
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:318
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:325
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:80
int profile
profile
Definition: avcodec.h:3116
int av_log2_16bit(unsigned v)
Definition: intmath.c:31
AVCodec.
Definition: avcodec.h:3473
int qscale
QP.
Definition: mpegvideo.h:211
RLTable.
Definition: rl.h:38
int field_select[2][2]
Definition: mpegvideo.h:285
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:1630
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:623
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:881
#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:192
AVRational mpeg2_frame_rate_ext
Definition: mpegvideo.h:225
if()
Definition: avfilter.c:975
uint8_t bits
Definition: crc.c:295
uint8_t
#define av_cold
Definition: attributes.h:74
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:63
static uint32_t mpeg1_lum_dc_uni[512]
Definition: mpeg12enc.c:64
static uint8_t uni_ac_vlc_len[64 *64 *2]
Definition: mjpegenc.c:42
AVOptions.
static void encode_mb_skip_run(MpegEncContext *s, int run)
Definition: mpeg12enc.c:393
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:123
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
Definition: avcodec.h:2013
timecode is drop frame
Definition: timecode.h:36
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:394
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:3117
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:359
static const AVOption mpeg1_options[]
Definition: mpeg12enc.c:1119
static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12enc.c:643
int interlaced_dct
Definition: mpegvideo.h:484
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:187
#define CHROMA_420
Definition: mpegvideo.h:476
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
int intra_dc_precision
Definition: mpegvideo.h:465
int repeat_first_field
Definition: mpegvideo.h:473
Structure to hold side data for an AVFrame.
Definition: frame.h:134
uint8_t(* mv_penalty)[MAX_MV *2+1]
bit amount needed to encode a MV
Definition: motion_est.h:87
static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV *2+1]
Definition: mpeg12enc.c:56
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
static int8_t mpeg1_max_level[2][64]
Definition: mpeg12enc.c:68
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:45
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:136
static const uint8_t header[24]
Definition: sdr2.c:67
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:316
int dquant
qscale difference to prev qscale
Definition: mpegvideo.h:217
int gop_picture_number
index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
Definition: mpegvideo.h:454
#define av_log(a,...)
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:695
int intra_only
if true, only intra pictures are generated
Definition: mpegvideo.h:109
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int last_dc[3]
last DC values for MPEG1
Definition: mpegvideo.h:192
static void put_mb_modes(MpegEncContext *s, int n, int bits, int has_mv, int field_motion)
Definition: mpeg12enc.c:557
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:323
int chroma_y_shift
Definition: mpegvideo.h:480
int strict_std_compliance
strictly follow the std (MPEG4, ...)
Definition: mpegvideo.h:125
#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:175
int av_nearer_q(AVRational q, AVRational q1, AVRational q2)
Definition: rational.c:126
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:609
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1596
uint8_t * buf
Definition: put_bits.h:38
int rc_max_rate
maximum bitrate
Definition: avcodec.h:2603
simple assert() macros that are a bit more flexible than ISO C assert().
int64_t av_gcd(int64_t a, int64_t b)
Return the greatest common divisor of a and b.
Definition: mathematics.c:55
const char * name
Name of the codec implementation.
Definition: avcodec.h:3480
int width
width and height in 1/16 pel
Definition: avcodec.h:1182
int low_delay
no reordering needed / has no b-frames
Definition: mpegvideo.h:411
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:35
Libavcodec external API header.
static void mpeg1_encode_sequence_header(MpegEncContext *s)
Definition: mpeg12enc.c:239
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
Definition: mpeg12enc.c:570
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:85
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:363
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2580
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:319
#define mpeg12_class(x)
Definition: mpeg12enc.c:1137
int intra_vlc_format
Definition: mpegvideo.h:470
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2824
int64_t timecode_frame_start
GOP timecode frame start number.
Definition: avcodec.h:2731
int progressive_frame
Definition: mpegvideo.h:482
uint8_t * vbv_delay_ptr
pointer to vbv_delay in the bitstream
Definition: mpegvideo.h:456
const uint16_t(* table_vlc)[2]
Definition: rl.h:41
static uint8_t fcode_tab[MAX_MV *2+1]
Definition: mpeg12enc.c:57
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1680
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:191
RLTable ff_rl_mpeg1
Definition: mpeg12data.c:166
int alternate_scan
Definition: mpegvideo.h:471
#define GOP_START_CODE
Definition: mpegvideo.h:78
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2215
static uint8_t uni_mpeg2_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:60
#define FFABS(a)
Definition: common.h:61
int level
level
Definition: avcodec.h:3205
#define VE
Definition: mpeg12enc.c:1108
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:93
MotionEstContext me
Definition: mpegvideo.h:290
int n
Definition: avisynth_c.h:547
#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:70
static void put_header(MpegEncContext *s, int header)
Definition: mpeg12enc.c:231
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:107
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:3034
static const uint8_t svcd_scan_offset_placeholder[]
Definition: mpeg12enc.c:51
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:923
static const int8_t mv[256][2]
Definition: 4xm.c:77
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:274
int frame_pred_frame_dct
Definition: mpegvideo.h:466
#define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE
timecode is in drop frame format.
Definition: avcodec.h:815
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:271
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2823
int coded_picture_number
picture number in bitstream order
Definition: frame.h:274
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:127
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int concealment_motion_vectors
Definition: mpegvideo.h:468
char * tc_opt_str
timecode option string
Definition: mpegvideo.h:492
enum AVCodecID codec_id
Definition: avcodec.h:1518
Timecode helpers header.
main external API structure.
Definition: avcodec.h:1501
ScanTable intra_scantable
Definition: mpegvideo.h:98
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:107
MPEG1/2 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:722
uint8_t * data
Definition: frame.h:136
av_cold int ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: rl.c:37
int ff_mpv_encode_init(AVCodecContext *avctx)
uint8_t * inter_ac_vlc_length
Definition: mpegvideo.h:322
static uint8_t mpeg1_index_run[2][64]
Definition: mpeg12enc.c:67
int progressive_sequence
Definition: mpegvideo.h:459
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:2063
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
int index
Definition: gxfenc.c:89
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2229
rational number numerator/denominator
Definition: rational.h:43
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2222
struct AVFrame * f
Definition: mpegpicture.h:46
#define COMMON_OPTS
Definition: mpeg12enc.c:1109
uint8_t * index_run[2]
encoding only
Definition: rl.h:44
#define OFFSET(x)
Definition: mpeg12enc.c:1107
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: mpeg12enc.c:428
int f_code
forward MV resolution
Definition: mpegvideo.h:245
#define MAX_FCODE
Definition: mpegvideo.h:63
#define MV_DIR_FORWARD
Definition: mpegvideo.h:270
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:2070
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:219
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
int bit_rate
wanted bit rate
Definition: mpegvideo.h:110
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:115
Views are on top of each other.
Definition: stereo3d.h:55
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:139
int last_mv_dir
last mv_dir, used for b frame encoding
Definition: mpegvideo.h:455
void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64], int motion_x, int motion_y)
Definition: mpeg12enc.c:1000
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:133
Pan Scan area.
Definition: avcodec.h:1169
uint8_t level
Definition: svq3.c:150
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:284
static av_cold int encode_init(AVCodecContext *avctx)
Definition: mpeg12enc.c:144
MpegEncContext.
Definition: mpegvideo.h:88
Views are next to each other.
Definition: stereo3d.h:45
struct AVCodecContext * avctx
Definition: mpegvideo.h:105
PutBitContext pb
bit output
Definition: mpegvideo.h:158
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:415
static av_always_inline void put_qscale(MpegEncContext *s)
Definition: mpeg12enc.c:403
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
static uint32_t mpeg1_chr_dc_uni[512]
Definition: mpeg12enc.c:65
static const AVOption mpeg2_options[]
Definition: mpeg12enc.c:1125
uint8_t ff_mpeg12_static_rl_table_store[2][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: mpeg12.c:45
Bi-dir predicted.
Definition: avutil.h:276
const uint8_t ff_mpeg12_mbPatTable[64][2]
Definition: mpeg12data.c:221
int den
denominator
Definition: rational.h:45
int ff_mpv_encode_end(AVCodecContext *avctx)
void * priv_data
Definition: avcodec.h:1543
void ff_mpeg1_encode_slice_header(MpegEncContext *s)
Definition: mpeg12enc.c:414
#define PICT_FRAME
Definition: mpegutils.h:35
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:360
int frame_rate_index
Definition: mpegvideo.h:224
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:463
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:372
int len
#define SEQ_START_CODE
Definition: mpegvideo.h:77
int drop_frame_timecode
timecode is in drop frame format.
Definition: mpegvideo.h:486
#define av_log2
Definition: intmath.h:105
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:364
const uint8_t ff_mpeg12_mbAddrIncrTable[36][2]
Definition: mpeg12data.c:182
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1603
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
const uint8_t ff_mpeg12_mbMotionVectorTable[17][2]
Definition: mpeg12data.c:288
#define PICTURE_START_CODE
Definition: mpegvideo.h:79
#define av_always_inline
Definition: attributes.h:37
#define AV_CODEC_FLAG_CLOSED_GOP
Allow non spec compliant speedup tricks.
Definition: avcodec.h:800
int b_code
backward MV resolution for B Frames (mpeg4)
Definition: mpegvideo.h:246
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
AVTimecode tc
timecode context
Definition: mpegvideo.h:493
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:61
const AVRational ff_mpeg12_frame_rate_tab[16]
Definition: mpeg12data.c:308
int strict_std_compliance
strictly follow the standard (MPEG4, ...).
Definition: avcodec.h:2819
Predicted.
Definition: avutil.h:275
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:3206
static int width
static int16_t block[64]
Definition: dct-test.c:110