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mpeg12enc.c
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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_DMV * 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 (ff_mpv_encode_init(avctx) < 0)
149  return -1;
150 
151  if (find_frame_rate_index(s) < 0) {
153  av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n",
154  avctx->time_base.den, avctx->time_base.num);
155  return -1;
156  } else {
157  av_log(avctx, AV_LOG_INFO,
158  "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n",
159  avctx->time_base.den, avctx->time_base.num);
160  }
161  }
162 
163  if (avctx->profile == FF_PROFILE_UNKNOWN) {
164  if (avctx->level != FF_LEVEL_UNKNOWN) {
165  av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
166  return -1;
167  }
168  /* Main or 4:2:2 */
169  avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
170  }
171 
172  if (avctx->level == FF_LEVEL_UNKNOWN) {
173  if (avctx->profile == 0) { /* 4:2:2 */
174  if (avctx->width <= 720 && avctx->height <= 608)
175  avctx->level = 5; /* Main */
176  else
177  avctx->level = 2; /* High */
178  } else {
179  if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
180  av_log(avctx, AV_LOG_ERROR,
181  "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
182  return -1;
183  }
184  if (avctx->width <= 720 && avctx->height <= 576)
185  avctx->level = 8; /* Main */
186  else if (avctx->width <= 1440)
187  avctx->level = 6; /* High 1440 */
188  else
189  avctx->level = 4; /* High */
190  }
191  }
192 
193  if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
194  av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
195  return AVERROR(EINVAL);
196  }
197 
199  if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
200  av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
201  "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
202  return AVERROR(EINVAL);
203  }
204  }
205 
207  if (s->drop_frame_timecode)
209  if (s->drop_frame_timecode && s->frame_rate_index != 4) {
210  av_log(avctx, AV_LOG_ERROR,
211  "Drop frame time code only allowed with 1001/30000 fps\n");
212  return -1;
213  }
214 
215  if (s->tc_opt_str) {
217  int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
218  if (ret < 0)
219  return ret;
222  } else {
223  s->avctx->timecode_frame_start = 0; // default is -1
224  }
225  return 0;
226 }
227 
228 static void put_header(MpegEncContext *s, int header)
229 {
231  put_bits(&s->pb, 16, header >> 16);
232  put_sbits(&s->pb, 16, header);
233 }
234 
235 /* put sequence header if needed */
237 {
238  unsigned int vbv_buffer_size, fps, v;
239  int i, constraint_parameter_flag;
240  uint64_t time_code;
241  int64_t best_aspect_error = INT64_MAX;
242  AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
243 
244  if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
245  aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
246 
247  if (s->current_picture.f->key_frame) {
249 
250  /* mpeg1 header repeated every gop */
252 
253  put_sbits(&s->pb, 12, s->width & 0xFFF);
254  put_sbits(&s->pb, 12, s->height & 0xFFF);
255 
256  for (i = 1; i < 15; i++) {
257  int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
258  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
259  error -= (1LL<<32) / ff_mpeg1_aspect[i];
260  else
261  error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
262 
263  error = FFABS(error);
264 
265  if (error - 2 <= best_aspect_error) {
266  best_aspect_error = error;
267  s->aspect_ratio_info = i;
268  }
269  }
270 
271  put_bits(&s->pb, 4, s->aspect_ratio_info);
272  put_bits(&s->pb, 4, s->frame_rate_index);
273 
274  if (s->avctx->rc_max_rate) {
275  v = (s->avctx->rc_max_rate + 399) / 400;
276  if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
277  v = 0x3ffff;
278  } else {
279  v = 0x3FFFF;
280  }
281 
282  if (s->avctx->rc_buffer_size)
283  vbv_buffer_size = s->avctx->rc_buffer_size;
284  else
285  /* VBV calculation: Scaled so that a VCD has the proper
286  * VBV size of 40 kilobytes */
287  vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
288  vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
289 
290  put_sbits(&s->pb, 18, v);
291  put_bits(&s->pb, 1, 1); // marker
292  put_sbits(&s->pb, 10, vbv_buffer_size);
293 
294  constraint_parameter_flag =
295  s->width <= 768 &&
296  s->height <= 576 &&
297  s->mb_width * s->mb_height <= 396 &&
298  s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
299  framerate.num <= framerate.den * 30 &&
300  s->avctx->me_range &&
301  s->avctx->me_range < 128 &&
302  vbv_buffer_size <= 20 &&
303  v <= 1856000 / 400 &&
305 
306  put_bits(&s->pb, 1, constraint_parameter_flag);
307 
310 
311  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
312  AVFrameSideData *side_data;
313  int width = s->width;
314  int height = s->height;
315  int use_seq_disp_ext;
316 
318  put_bits(&s->pb, 4, 1); // seq ext
319 
320  put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
321 
322  put_bits(&s->pb, 3, s->avctx->profile); // profile
323  put_bits(&s->pb, 4, s->avctx->level); // level
324 
325  put_bits(&s->pb, 1, s->progressive_sequence);
326  put_bits(&s->pb, 2, s->chroma_format);
327  put_bits(&s->pb, 2, s->width >> 12);
328  put_bits(&s->pb, 2, s->height >> 12);
329  put_bits(&s->pb, 12, v >> 18); // bitrate ext
330  put_bits(&s->pb, 1, 1); // marker
331  put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
332  put_bits(&s->pb, 1, s->low_delay);
333  put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
334  put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
335 
337  if (side_data) {
338  AVPanScan *pan_scan = (AVPanScan *)side_data->data;
339  if (pan_scan->width && pan_scan->height) {
340  width = pan_scan->width >> 4;
341  height = pan_scan->height >> 4;
342  }
343  }
344 
345  use_seq_disp_ext = (width != s->width ||
346  height != s->height ||
350 
351  if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
353  put_bits(&s->pb, 4, 2); // sequence display extension
354  put_bits(&s->pb, 3, 0); // video_format: 0 is components
355  put_bits(&s->pb, 1, 1); // colour_description
356  put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
357  put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
358  put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
359  put_bits(&s->pb, 14, width); // display_horizontal_size
360  put_bits(&s->pb, 1, 1); // marker_bit
361  put_bits(&s->pb, 14, height); // display_vertical_size
362  put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
363  }
364  }
365 
367  put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
368  /* time code: we must convert from the real frame rate to a
369  * fake MPEG frame rate in case of low frame rate */
370  fps = (framerate.num + framerate.den / 2) / framerate.den;
371  time_code = s->current_picture_ptr->f->coded_picture_number +
373 
375 
377  if (s->drop_frame_timecode)
378  time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
379 
380  put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
381  put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
382  put_bits(&s->pb, 1, 1);
383  put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
384  put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
386  put_bits(&s->pb, 1, 0); // broken link
387  }
388 }
389 
390 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
391 {
392  while (run >= 33) {
393  put_bits(&s->pb, 11, 0x008);
394  run -= 33;
395  }
397  ff_mpeg12_mbAddrIncrTable[run][0]);
398 }
399 
401 {
402  if (s->q_scale_type) {
403  int qp = inv_non_linear_qscale[s->qscale];
404  av_assert2(s->qscale >= 1 && qp > 0);
405  put_bits(&s->pb, 5, qp);
406  } else {
407  put_bits(&s->pb, 5, s->qscale);
408  }
409 }
410 
412 {
413  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
414  put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
415  /* slice_vertical_position_extension */
416  put_bits(&s->pb, 3, s->mb_y >> 7);
417  } else {
419  }
420  put_qscale(s);
421  /* slice extra information */
422  put_bits(&s->pb, 1, 0);
423 }
424 
426 {
427  AVFrameSideData *side_data;
429 
430  /* mpeg1 picture header */
432  /* temporal reference */
433 
434  // RAL: s->picture_number instead of s->fake_picture_number
435  put_bits(&s->pb, 10,
436  (s->picture_number - s->gop_picture_number) & 0x3ff);
437  put_bits(&s->pb, 3, s->pict_type);
438 
439  s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
440  put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
441 
442  // RAL: Forward f_code also needed for B-frames
443  if (s->pict_type == AV_PICTURE_TYPE_P ||
445  put_bits(&s->pb, 1, 0); /* half pel coordinates */
447  put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
448  else
449  put_bits(&s->pb, 3, 7); /* forward_f_code */
450  }
451 
452  // RAL: Backward f_code necessary for B-frames
453  if (s->pict_type == AV_PICTURE_TYPE_B) {
454  put_bits(&s->pb, 1, 0); /* half pel coordinates */
456  put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
457  else
458  put_bits(&s->pb, 3, 7); /* backward_f_code */
459  }
460 
461  put_bits(&s->pb, 1, 0); /* extra bit picture */
462 
463  s->frame_pred_frame_dct = 1;
464  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
466  put_bits(&s->pb, 4, 8); /* pic ext */
467  if (s->pict_type == AV_PICTURE_TYPE_P ||
469  put_bits(&s->pb, 4, s->f_code);
470  put_bits(&s->pb, 4, s->f_code);
471  } else {
472  put_bits(&s->pb, 8, 255);
473  }
474  if (s->pict_type == AV_PICTURE_TYPE_B) {
475  put_bits(&s->pb, 4, s->b_code);
476  put_bits(&s->pb, 4, s->b_code);
477  } else {
478  put_bits(&s->pb, 8, 255);
479  }
480  put_bits(&s->pb, 2, s->intra_dc_precision);
481 
483  put_bits(&s->pb, 2, s->picture_structure);
484  if (s->progressive_sequence)
485  put_bits(&s->pb, 1, 0); /* no repeat */
486  else
488  /* XXX: optimize the generation of this flag with entropy measures */
490 
491  put_bits(&s->pb, 1, s->frame_pred_frame_dct);
493  put_bits(&s->pb, 1, s->q_scale_type);
494  put_bits(&s->pb, 1, s->intra_vlc_format);
495  put_bits(&s->pb, 1, s->alternate_scan);
496  put_bits(&s->pb, 1, s->repeat_first_field);
498  /* chroma_420_type */
499  put_bits(&s->pb, 1, s->chroma_format ==
500  CHROMA_420 ? s->progressive_frame : 0);
501  put_bits(&s->pb, 1, s->progressive_frame);
502  put_bits(&s->pb, 1, 0); /* composite_display_flag */
503  }
504  if (s->scan_offset) {
505  int i;
506 
508  for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
510  }
513  if (side_data) {
514  AVStereo3D *stereo = (AVStereo3D *)side_data->data;
515  uint8_t fpa_type;
516 
517  switch (stereo->type) {
519  fpa_type = 0x03;
520  break;
522  fpa_type = 0x04;
523  break;
524  case AV_STEREO3D_2D:
525  fpa_type = 0x08;
526  break;
528  fpa_type = 0x23;
529  break;
530  default:
531  fpa_type = 0;
532  break;
533  }
534 
535  if (fpa_type != 0) {
537  put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
538  put_bits(&s->pb, 8, 'P');
539  put_bits(&s->pb, 8, '3');
540  put_bits(&s->pb, 8, 'D');
541  put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
542 
543  put_bits(&s->pb, 1, 1); // reserved_bit
544  put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
545  put_bits(&s->pb, 8, 0x04); // reserved_data[0]
546  put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
547  }
548  }
549 
550  s->mb_y = 0;
552 }
553 
554 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
555  int has_mv, int field_motion)
556 {
557  put_bits(&s->pb, n, bits);
558  if (!s->frame_pred_frame_dct) {
559  if (has_mv)
560  /* motion_type: frame/field */
561  put_bits(&s->pb, 2, 2 - field_motion);
562  put_bits(&s->pb, 1, s->interlaced_dct);
563  }
564 }
565 
566 // RAL: Parameter added: f_or_b_code
567 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
568 {
569  if (val == 0) {
570  /* zero vector */
571  put_bits(&s->pb,
574  } else {
575  int code, sign, bits;
576  int bit_size = f_or_b_code - 1;
577  int range = 1 << bit_size;
578  /* modulo encoding */
579  val = sign_extend(val, 5 + bit_size);
580 
581  if (val >= 0) {
582  val--;
583  code = (val >> bit_size) + 1;
584  bits = val & (range - 1);
585  sign = 0;
586  } else {
587  val = -val;
588  val--;
589  code = (val >> bit_size) + 1;
590  bits = val & (range - 1);
591  sign = 1;
592  }
593 
594  av_assert2(code > 0 && code <= 16);
595 
596  put_bits(&s->pb,
599 
600  put_bits(&s->pb, 1, sign);
601  if (bit_size > 0)
602  put_bits(&s->pb, bit_size, bits);
603  }
604 }
605 
606 static inline void encode_dc(MpegEncContext *s, int diff, int component)
607 {
608  unsigned int diff_u = diff + 255;
609  if (diff_u >= 511) {
610  int index;
611 
612  if (diff < 0) {
613  index = av_log2_16bit(-2 * diff);
614  diff--;
615  } else {
616  index = av_log2_16bit(2 * diff);
617  }
618  if (component == 0)
619  put_bits(&s->pb,
620  ff_mpeg12_vlc_dc_lum_bits[index] + index,
621  (ff_mpeg12_vlc_dc_lum_code[index] << index) +
622  av_mod_uintp2(diff, index));
623  else
624  put_bits(&s->pb,
625  ff_mpeg12_vlc_dc_chroma_bits[index] + index,
626  (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
627  av_mod_uintp2(diff, index));
628  } else {
629  if (component == 0)
630  put_bits(&s->pb,
631  mpeg1_lum_dc_uni[diff + 255] & 0xFF,
632  mpeg1_lum_dc_uni[diff + 255] >> 8);
633  else
634  put_bits(&s->pb,
635  mpeg1_chr_dc_uni[diff + 255] & 0xFF,
636  mpeg1_chr_dc_uni[diff + 255] >> 8);
637  }
638 }
639 
640 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
641 {
642  int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
643  int code, component;
644  const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
645 
646  last_index = s->block_last_index[n];
647 
648  /* DC coef */
649  if (s->mb_intra) {
650  component = (n <= 3 ? 0 : (n & 1) + 1);
651  dc = block[0]; /* overflow is impossible */
652  diff = dc - s->last_dc[component];
653  encode_dc(s, diff, component);
654  s->last_dc[component] = dc;
655  i = 1;
656  if (s->intra_vlc_format)
657  table_vlc = ff_rl_mpeg2.table_vlc;
658  } else {
659  /* encode the first coefficient: needs to be done here because
660  * it is handled slightly differently */
661  level = block[0];
662  if (abs(level) == 1) {
663  code = ((uint32_t)level >> 31); /* the sign bit */
664  put_bits(&s->pb, 2, code | 0x02);
665  i = 1;
666  } else {
667  i = 0;
668  last_non_zero = -1;
669  goto next_coef;
670  }
671  }
672 
673  /* now quantify & encode AC coefs */
674  last_non_zero = i - 1;
675 
676  for (; i <= last_index; i++) {
677  j = s->intra_scantable.permutated[i];
678  level = block[j];
679 
680 next_coef:
681  /* encode using VLC */
682  if (level != 0) {
683  run = i - last_non_zero - 1;
684 
685  alevel = level;
686  MASK_ABS(sign, alevel);
687  sign &= 1;
688 
689  if (alevel <= mpeg1_max_level[0][run]) {
690  code = mpeg1_index_run[0][run] + alevel - 1;
691  /* store the VLC & sign at once */
692  put_bits(&s->pb, table_vlc[code][1] + 1,
693  (table_vlc[code][0] << 1) + sign);
694  } else {
695  /* escape seems to be pretty rare <5% so I do not optimize it */
696  put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
697  /* escape: only clip in this case */
698  put_bits(&s->pb, 6, run);
699  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
700  if (alevel < 128) {
701  put_sbits(&s->pb, 8, level);
702  } else {
703  if (level < 0)
704  put_bits(&s->pb, 16, 0x8001 + level + 255);
705  else
706  put_sbits(&s->pb, 16, level);
707  }
708  } else {
709  put_sbits(&s->pb, 12, level);
710  }
711  }
712  last_non_zero = i;
713  }
714  }
715  /* end of block */
716  put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
717 }
718 
720  int16_t block[8][64],
721  int motion_x, int motion_y,
722  int mb_block_count)
723 {
724  int i, cbp;
725  const int mb_x = s->mb_x;
726  const int mb_y = s->mb_y;
727  const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
728 
729  /* compute cbp */
730  cbp = 0;
731  for (i = 0; i < mb_block_count; i++)
732  if (s->block_last_index[i] >= 0)
733  cbp |= 1 << (mb_block_count - 1 - i);
734 
735  if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
736  (mb_x != s->mb_width - 1 ||
737  (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
738  ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
739  (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
740  (((s->mv_dir & MV_DIR_FORWARD)
741  ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
742  (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
743  ((s->mv_dir & MV_DIR_BACKWARD)
744  ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
745  (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
746  s->mb_skip_run++;
747  s->qscale -= s->dquant;
748  s->skip_count++;
749  s->misc_bits++;
750  s->last_bits++;
751  if (s->pict_type == AV_PICTURE_TYPE_P) {
752  s->last_mv[0][0][0] =
753  s->last_mv[0][0][1] =
754  s->last_mv[0][1][0] =
755  s->last_mv[0][1][1] = 0;
756  }
757  } else {
758  if (first_mb) {
759  av_assert0(s->mb_skip_run == 0);
760  encode_mb_skip_run(s, s->mb_x);
761  } else {
763  }
764 
765  if (s->pict_type == AV_PICTURE_TYPE_I) {
766  if (s->dquant && cbp) {
767  /* macroblock_type: macroblock_quant = 1 */
768  put_mb_modes(s, 2, 1, 0, 0);
769  put_qscale(s);
770  } else {
771  /* macroblock_type: macroblock_quant = 0 */
772  put_mb_modes(s, 1, 1, 0, 0);
773  s->qscale -= s->dquant;
774  }
775  s->misc_bits += get_bits_diff(s);
776  s->i_count++;
777  } else if (s->mb_intra) {
778  if (s->dquant && cbp) {
779  put_mb_modes(s, 6, 0x01, 0, 0);
780  put_qscale(s);
781  } else {
782  put_mb_modes(s, 5, 0x03, 0, 0);
783  s->qscale -= s->dquant;
784  }
785  s->misc_bits += get_bits_diff(s);
786  s->i_count++;
787  memset(s->last_mv, 0, sizeof(s->last_mv));
788  } else if (s->pict_type == AV_PICTURE_TYPE_P) {
789  if (s->mv_type == MV_TYPE_16X16) {
790  if (cbp != 0) {
791  if ((motion_x | motion_y) == 0) {
792  if (s->dquant) {
793  /* macroblock_pattern & quant */
794  put_mb_modes(s, 5, 1, 0, 0);
795  put_qscale(s);
796  } else {
797  /* macroblock_pattern only */
798  put_mb_modes(s, 2, 1, 0, 0);
799  }
800  s->misc_bits += get_bits_diff(s);
801  } else {
802  if (s->dquant) {
803  put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
804  put_qscale(s);
805  } else {
806  put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
807  }
808  s->misc_bits += get_bits_diff(s);
809  // RAL: f_code parameter added
811  motion_x - s->last_mv[0][0][0],
812  s->f_code);
813  // RAL: f_code parameter added
815  motion_y - s->last_mv[0][0][1],
816  s->f_code);
817  s->mv_bits += get_bits_diff(s);
818  }
819  } else {
820  put_bits(&s->pb, 3, 1); /* motion only */
821  if (!s->frame_pred_frame_dct)
822  put_bits(&s->pb, 2, 2); /* motion_type: frame */
823  s->misc_bits += get_bits_diff(s);
824  // RAL: f_code parameter added
826  motion_x - s->last_mv[0][0][0],
827  s->f_code);
828  // RAL: f_code parameter added
830  motion_y - s->last_mv[0][0][1],
831  s->f_code);
832  s->qscale -= s->dquant;
833  s->mv_bits += get_bits_diff(s);
834  }
835  s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
836  s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
837  } else {
839 
840  if (cbp) {
841  if (s->dquant) {
842  put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
843  put_qscale(s);
844  } else {
845  put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
846  }
847  } else {
848  put_bits(&s->pb, 3, 1); /* motion only */
849  put_bits(&s->pb, 2, 1); /* motion_type: field */
850  s->qscale -= s->dquant;
851  }
852  s->misc_bits += get_bits_diff(s);
853  for (i = 0; i < 2; i++) {
854  put_bits(&s->pb, 1, s->field_select[0][i]);
856  s->mv[0][i][0] - s->last_mv[0][i][0],
857  s->f_code);
859  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
860  s->f_code);
861  s->last_mv[0][i][0] = s->mv[0][i][0];
862  s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
863  }
864  s->mv_bits += get_bits_diff(s);
865  }
866  if (cbp) {
867  if (s->chroma_y_shift) {
868  put_bits(&s->pb,
869  ff_mpeg12_mbPatTable[cbp][1],
870  ff_mpeg12_mbPatTable[cbp][0]);
871  } else {
872  put_bits(&s->pb,
873  ff_mpeg12_mbPatTable[cbp >> 2][1],
874  ff_mpeg12_mbPatTable[cbp >> 2][0]);
875  put_sbits(&s->pb, 2, cbp);
876  }
877  }
878  s->f_count++;
879  } else {
880  if (s->mv_type == MV_TYPE_16X16) {
881  if (cbp) { // With coded bloc pattern
882  if (s->dquant) {
883  if (s->mv_dir == MV_DIR_FORWARD)
884  put_mb_modes(s, 6, 3, 1, 0);
885  else
886  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
887  put_qscale(s);
888  } else {
889  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
890  }
891  } else { // No coded bloc pattern
892  put_bits(&s->pb, 5 - s->mv_dir, 2);
893  if (!s->frame_pred_frame_dct)
894  put_bits(&s->pb, 2, 2); /* motion_type: frame */
895  s->qscale -= s->dquant;
896  }
897  s->misc_bits += get_bits_diff(s);
898  if (s->mv_dir & MV_DIR_FORWARD) {
900  s->mv[0][0][0] - s->last_mv[0][0][0],
901  s->f_code);
903  s->mv[0][0][1] - s->last_mv[0][0][1],
904  s->f_code);
905  s->last_mv[0][0][0] =
906  s->last_mv[0][1][0] = s->mv[0][0][0];
907  s->last_mv[0][0][1] =
908  s->last_mv[0][1][1] = s->mv[0][0][1];
909  s->f_count++;
910  }
911  if (s->mv_dir & MV_DIR_BACKWARD) {
913  s->mv[1][0][0] - s->last_mv[1][0][0],
914  s->b_code);
916  s->mv[1][0][1] - s->last_mv[1][0][1],
917  s->b_code);
918  s->last_mv[1][0][0] =
919  s->last_mv[1][1][0] = s->mv[1][0][0];
920  s->last_mv[1][0][1] =
921  s->last_mv[1][1][1] = s->mv[1][0][1];
922  s->b_count++;
923  }
924  } else {
927  if (cbp) { // With coded bloc pattern
928  if (s->dquant) {
929  if (s->mv_dir == MV_DIR_FORWARD)
930  put_mb_modes(s, 6, 3, 1, 1);
931  else
932  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
933  put_qscale(s);
934  } else {
935  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
936  }
937  } else { // No coded bloc pattern
938  put_bits(&s->pb, 5 - s->mv_dir, 2);
939  put_bits(&s->pb, 2, 1); /* motion_type: field */
940  s->qscale -= s->dquant;
941  }
942  s->misc_bits += get_bits_diff(s);
943  if (s->mv_dir & MV_DIR_FORWARD) {
944  for (i = 0; i < 2; i++) {
945  put_bits(&s->pb, 1, s->field_select[0][i]);
947  s->mv[0][i][0] - s->last_mv[0][i][0],
948  s->f_code);
950  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
951  s->f_code);
952  s->last_mv[0][i][0] = s->mv[0][i][0];
953  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
954  }
955  s->f_count++;
956  }
957  if (s->mv_dir & MV_DIR_BACKWARD) {
958  for (i = 0; i < 2; i++) {
959  put_bits(&s->pb, 1, s->field_select[1][i]);
961  s->mv[1][i][0] - s->last_mv[1][i][0],
962  s->b_code);
964  s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
965  s->b_code);
966  s->last_mv[1][i][0] = s->mv[1][i][0];
967  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
968  }
969  s->b_count++;
970  }
971  }
972  s->mv_bits += get_bits_diff(s);
973  if (cbp) {
974  if (s->chroma_y_shift) {
975  put_bits(&s->pb,
976  ff_mpeg12_mbPatTable[cbp][1],
977  ff_mpeg12_mbPatTable[cbp][0]);
978  } else {
979  put_bits(&s->pb,
980  ff_mpeg12_mbPatTable[cbp >> 2][1],
981  ff_mpeg12_mbPatTable[cbp >> 2][0]);
982  put_sbits(&s->pb, 2, cbp);
983  }
984  }
985  }
986  for (i = 0; i < mb_block_count; i++)
987  if (cbp & (1 << (mb_block_count - 1 - i)))
988  mpeg1_encode_block(s, block[i], i);
989  s->mb_skip_run = 0;
990  if (s->mb_intra)
991  s->i_tex_bits += get_bits_diff(s);
992  else
993  s->p_tex_bits += get_bits_diff(s);
994  }
995 }
996 
997 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
998  int motion_x, int motion_y)
999 {
1000  if (s->chroma_format == CHROMA_420)
1001  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1002  else
1003  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1004 }
1005 
1007 {
1008  static int done = 0;
1009 
1011 
1012  if (!done) {
1013  int f_code;
1014  int mv;
1015  int i;
1016 
1017  done = 1;
1020 
1021  for (i = 0; i < 64; i++) {
1022  mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1023  mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1024  }
1025 
1027  if (s->intra_vlc_format)
1029 
1030  /* build unified dc encoding tables */
1031  for (i = -255; i < 256; i++) {
1032  int adiff, index;
1033  int bits, code;
1034  int diff = i;
1035 
1036  adiff = FFABS(diff);
1037  if (diff < 0)
1038  diff--;
1039  index = av_log2(2 * adiff);
1040 
1042  code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1043  av_mod_uintp2(diff, index);
1044  mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1045 
1048  av_mod_uintp2(diff, index);
1049  mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1050  }
1051 
1052  for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1053  for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1054  int len;
1055 
1056  if (mv == 0) {
1057  len = ff_mpeg12_mbMotionVectorTable[0][1];
1058  } else {
1059  int val, bit_size, code;
1060 
1061  bit_size = f_code - 1;
1062 
1063  val = mv;
1064  if (val < 0)
1065  val = -val;
1066  val--;
1067  code = (val >> bit_size) + 1;
1068  if (code < 17)
1069  len = ff_mpeg12_mbMotionVectorTable[code][1] +
1070  1 + bit_size;
1071  else
1072  len = ff_mpeg12_mbMotionVectorTable[16][1] +
1073  2 + bit_size;
1074  }
1075 
1076  mv_penalty[f_code][mv + MAX_DMV] = len;
1077  }
1078 
1079 
1080  for (f_code = MAX_FCODE; f_code > 0; f_code--)
1081  for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1082  fcode_tab[mv + MAX_MV] = f_code;
1083  }
1084  s->me.mv_penalty = mv_penalty;
1085  s->fcode_tab = fcode_tab;
1086  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1087  s->min_qcoeff = -255;
1088  s->max_qcoeff = 255;
1089  } else {
1090  s->min_qcoeff = -2047;
1091  s->max_qcoeff = 2047;
1092  }
1093  if (s->intra_vlc_format) {
1094  s->intra_ac_vlc_length =
1096  } else {
1097  s->intra_ac_vlc_length =
1099  }
1100  s->inter_ac_vlc_length =
1102 }
1103 
1104 #define OFFSET(x) offsetof(MpegEncContext, x)
1105 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1106 #define COMMON_OPTS \
1107  { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", \
1108  OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1109  { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1110  OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1111  { "drop_frame_timecode", "Timecode is in drop frame format.", \
1112  OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
1113  { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1114  OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1115 
1116 static const AVOption mpeg1_options[] = {
1117  COMMON_OPTS
1119  { NULL },
1120 };
1121 
1122 static const AVOption mpeg2_options[] = {
1123  COMMON_OPTS
1124  { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1125  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1126  { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1127  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1128  { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1129  { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1131  { NULL },
1132 };
1133 
1134 #define mpeg12_class(x) \
1135 static const AVClass mpeg ## x ## _class = { \
1136  .class_name = "mpeg" # x "video encoder", \
1137  .item_name = av_default_item_name, \
1138  .option = mpeg ## x ## _options, \
1139  .version = LIBAVUTIL_VERSION_INT, \
1140 };
1141 
1143 mpeg12_class(2)
1144 
1145 AVCodec ff_mpeg1video_encoder = {
1146  .name = "mpeg1video",
1147  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1148  .type = AVMEDIA_TYPE_VIDEO,
1149  .id = AV_CODEC_ID_MPEG1VIDEO,
1150  .priv_data_size = sizeof(MpegEncContext),
1151  .init = encode_init,
1152  .encode2 = ff_mpv_encode_picture,
1153  .close = ff_mpv_encode_end,
1154  .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1155  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1156  AV_PIX_FMT_NONE },
1158  .priv_class = &mpeg1_class,
1159 };
1160 
1162  .name = "mpeg2video",
1163  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1164  .type = AVMEDIA_TYPE_VIDEO,
1165  .id = AV_CODEC_ID_MPEG2VIDEO,
1166  .priv_data_size = sizeof(MpegEncContext),
1167  .init = encode_init,
1168  .encode2 = ff_mpv_encode_picture,
1169  .close = ff_mpv_encode_end,
1170  .supported_framerates = ff_mpeg2_frame_rate_tab,
1171  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1173  AV_PIX_FMT_NONE },
1175  .priv_class = &mpeg2_class,
1176 };
av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
Definition: mpeg12enc.c:1006
static uint8_t uni_mpeg1_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:59
#define MASK_ABS(mask, level)
Definition: mathops.h:163
#define NULL
Definition: coverity.c:32
AVCodec ff_mpeg2video_encoder
Definition: mpeg12enc.c:1161
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:200
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:205
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:35
int height
Definition: avcodec.h:1184
#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:1912
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:3125
AVCodec.
Definition: avcodec.h:3482
uint8_t(* mv_penalty)[MAX_DMV *2+1]
bit amount needed to encode a MV
Definition: motion_est.h:92
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:1641
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:626
#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:882
#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
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:390
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:2024
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:3126
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:359
static const AVOption mpeg1_options[]
Definition: mpeg12enc.c:1116
static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12enc.c:640
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
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 MAX_DMV
Definition: motion_est.h:37
#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:554
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:178
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:606
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1607
uint8_t * buf
Definition: put_bits.h:38
int rc_max_rate
maximum bitrate
Definition: avcodec.h:2614
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:3489
int width
width and height in 1/16 pel
Definition: avcodec.h:1183
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:236
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
Definition: mpeg12enc.c:567
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:71
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:2591
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:319
#define mpeg12_class(x)
Definition: mpeg12enc.c:1134
int intra_vlc_format
Definition: mpegvideo.h:470
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2835
int64_t timecode_frame_start
GOP timecode frame start number.
Definition: avcodec.h:2742
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
int width
picture width / height.
Definition: avcodec.h:1691
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:2226
static uint8_t uni_mpeg2_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:60
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:68
int level
level
Definition: avcodec.h:3214
#define VE
Definition: mpeg12enc.c:1105
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:228
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:107
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
#define av_log2
Definition: intmath.h:100
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:924
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:816
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:2834
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
Timecode helpers header.
main external API structure.
Definition: avcodec.h:1512
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:719
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:2074
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
static uint8_t mv_penalty[MAX_FCODE+1][MAX_DMV *2+1]
Definition: mpeg12enc.c:56
int index
Definition: gxfenc.c:89
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2240
rational number numerator/denominator
Definition: rational.h:43
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2233
struct AVFrame * f
Definition: mpegpicture.h:46
#define COMMON_OPTS
Definition: mpeg12enc.c:1106
uint8_t * index_run[2]
encoding only
Definition: rl.h:44
#define OFFSET(x)
Definition: mpeg12enc.c:1104
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: mpeg12enc.c:425
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:2081
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:245
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:115
Views are on top of each other.
Definition: stereo3d.h:55
#define av_log2_16bit
Definition: intmath.h:101
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:138
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:997
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:133
Pan Scan area.
Definition: avcodec.h:1170
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:400
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:67
if(ret< 0)
Definition: vf_mcdeint.c:280
static uint32_t mpeg1_chr_dc_uni[512]
Definition: mpeg12enc.c:65
static const AVOption mpeg2_options[]
Definition: mpeg12enc.c:1122
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:268
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:1554
void ff_mpeg1_encode_slice_header(MpegEncContext *s)
Definition: mpeg12enc.c:411
#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
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
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:110
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1614
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:801
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:65
const AVRational ff_mpeg12_frame_rate_tab[16]
Definition: mpeg12data.c:308
int strict_std_compliance
strictly follow the standard (MPEG4, ...).
Definition: avcodec.h:2830
Predicted.
Definition: avutil.h:267
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:3215
static int width
static int16_t block[64]
Definition: dct-test.c:110