FFmpeg  4.2.1
mpeg12enc.c
Go to the documentation of this file.
1 /*
2  * MPEG-1/2 encoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * MPEG-1/2 encoder
26  */
27 
28 #include <stdint.h>
29 
30 #include "libavutil/attributes.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/log.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/timecode.h"
35 #include "libavutil/stereo3d.h"
36 
37 #include "avcodec.h"
38 #include "bytestream.h"
39 #include "mathops.h"
40 #include "mpeg12.h"
41 #include "mpeg12data.h"
42 #include "mpegutils.h"
43 #include "mpegvideo.h"
44 
46  0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
47  0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
48 };
49 
50 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
51 static uint8_t fcode_tab[MAX_MV * 2 + 1];
52 
53 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
54 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
55 
56 /* simple include everything table for dc, first byte is bits
57  * number next 3 are code */
58 static uint32_t mpeg1_lum_dc_uni[512];
59 static uint32_t mpeg1_chr_dc_uni[512];
60 
61 static uint8_t mpeg1_index_run[2][64];
62 static int8_t mpeg1_max_level[2][64];
63 
64 #define A53_MAX_CC_COUNT 0x1f
65 
66 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
67 {
68  int i;
69 
70  for (i = 0; i < 128; i++) {
71  int level = i - 64;
72  int run;
73  if (!level)
74  continue;
75  for (run = 0; run < 64; run++) {
76  int len, code;
77  int alevel = FFABS(level);
78 
79  if (alevel > rl->max_level[0][run])
80  code = 111; /* rl->n */
81  else
82  code = rl->index_run[0][run] + alevel - 1;
83 
84  if (code < 111) { /* rl->n */
85  /* length of VLC and sign */
86  len = rl->table_vlc[code][1] + 1;
87  } else {
88  len = rl->table_vlc[111 /* rl->n */][1] + 6;
89 
90  if (alevel < 128)
91  len += 8;
92  else
93  len += 16;
94  }
95 
96  uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
97  }
98  }
99 }
100 
102 {
103  int i;
104  AVRational bestq = (AVRational) {0, 0};
105  AVRational ext;
106  AVRational target = av_inv_q(s->avctx->time_base);
107 
108  for (i = 1; i < 14; i++) {
110  i >= 9)
111  break;
112 
113  for (ext.num=1; ext.num <= 4; ext.num++) {
114  for (ext.den=1; ext.den <= 32; ext.den++) {
116 
117  if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
118  continue;
119  if (av_gcd(ext.den, ext.num) != 1)
120  continue;
121 
122  if ( bestq.num==0
123  || av_nearer_q(target, bestq, q) < 0
124  || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
125  bestq = q;
126  s->frame_rate_index = i;
127  s->mpeg2_frame_rate_ext.num = ext.num;
128  s->mpeg2_frame_rate_ext.den = ext.den;
129  }
130  }
131  }
132  }
133 
134  if (av_cmp_q(target, bestq))
135  return -1;
136  else
137  return 0;
138 }
139 
141 {
142  MpegEncContext *s = avctx->priv_data;
143 
144  if (ff_mpv_encode_init(avctx) < 0)
145  return -1;
146 
147  if (find_frame_rate_index(s) < 0) {
149  av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
150  avctx->time_base.den, avctx->time_base.num);
151  return -1;
152  } else {
153  av_log(avctx, AV_LOG_INFO,
154  "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
155  avctx->time_base.den, avctx->time_base.num);
156  }
157  }
158 
159  if (avctx->profile == FF_PROFILE_UNKNOWN) {
160  if (avctx->level != FF_LEVEL_UNKNOWN) {
161  av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
162  return -1;
163  }
164  /* Main or 4:2:2 */
165  avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
166  }
167 
168  if (avctx->level == FF_LEVEL_UNKNOWN) {
169  if (avctx->profile == 0) { /* 4:2:2 */
170  if (avctx->width <= 720 && avctx->height <= 608)
171  avctx->level = 5; /* Main */
172  else
173  avctx->level = 2; /* High */
174  } else {
175  if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
176  av_log(avctx, AV_LOG_ERROR,
177  "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
178  return -1;
179  }
180  if (avctx->width <= 720 && avctx->height <= 576)
181  avctx->level = 8; /* Main */
182  else if (avctx->width <= 1440)
183  avctx->level = 6; /* High 1440 */
184  else
185  avctx->level = 4; /* High */
186  }
187  }
188 
189  if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
190  av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
191  return AVERROR(EINVAL);
192  }
193 
195  if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
196  av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
197  "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
198  return AVERROR(EINVAL);
199  }
200  }
201 
203  if (s->drop_frame_timecode)
205  if (s->drop_frame_timecode && s->frame_rate_index != 4) {
206  av_log(avctx, AV_LOG_ERROR,
207  "Drop frame time code only allowed with 1001/30000 fps\n");
208  return -1;
209  }
210 
211 #if FF_API_PRIVATE_OPT
213  if (avctx->timecode_frame_start)
216 #endif
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;
224  s->timecode_frame_start = s->tc.start;
225  } else {
226  s->timecode_frame_start = 0; // default is -1
227  }
228 
229  return 0;
230 }
231 
232 static void put_header(MpegEncContext *s, int header)
233 {
235  put_bits(&s->pb, 16, header >> 16);
236  put_sbits(&s->pb, 16, header);
237 }
238 
239 /* put sequence header if needed */
241 {
242  unsigned int vbv_buffer_size, fps, v;
243  int i, constraint_parameter_flag;
244  uint64_t time_code;
245  int64_t best_aspect_error = INT64_MAX;
246  AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
247 
248  if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
249  aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
250 
251  if (s->current_picture.f->key_frame) {
253 
254  /* MPEG-1 header repeated every GOP */
256 
257  put_sbits(&s->pb, 12, s->width & 0xFFF);
258  put_sbits(&s->pb, 12, s->height & 0xFFF);
259 
260  for (i = 1; i < 15; i++) {
261  int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
262  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
263  error -= (1LL<<32) / ff_mpeg1_aspect[i];
264  else
265  error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
266 
267  error = FFABS(error);
268 
269  if (error - 2 <= best_aspect_error) {
270  best_aspect_error = error;
271  s->aspect_ratio_info = i;
272  }
273  }
274 
275  put_bits(&s->pb, 4, s->aspect_ratio_info);
276  put_bits(&s->pb, 4, s->frame_rate_index);
277 
278  if (s->avctx->rc_max_rate) {
279  v = (s->avctx->rc_max_rate + 399) / 400;
280  if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
281  v = 0x3ffff;
282  } else {
283  v = 0x3FFFF;
284  }
285 
286  if (s->avctx->rc_buffer_size)
287  vbv_buffer_size = s->avctx->rc_buffer_size;
288  else
289  /* VBV calculation: Scaled so that a VCD has the proper
290  * VBV size of 40 kilobytes */
291  vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
292  vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
293 
294  put_sbits(&s->pb, 18, v);
295  put_bits(&s->pb, 1, 1); // marker
296  put_sbits(&s->pb, 10, vbv_buffer_size);
297 
298  constraint_parameter_flag =
299  s->width <= 768 &&
300  s->height <= 576 &&
301  s->mb_width * s->mb_height <= 396 &&
302  s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
303  framerate.num <= framerate.den * 30 &&
304  s->avctx->me_range &&
305  s->avctx->me_range < 128 &&
306  vbv_buffer_size <= 20 &&
307  v <= 1856000 / 400 &&
309 
310  put_bits(&s->pb, 1, constraint_parameter_flag);
311 
314 
315  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
316  AVFrameSideData *side_data;
317  int width = s->width;
318  int height = s->height;
319  int use_seq_disp_ext;
320 
322  put_bits(&s->pb, 4, 1); // seq ext
323 
324  put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
325 
326  put_bits(&s->pb, 3, s->avctx->profile); // profile
327  put_bits(&s->pb, 4, s->avctx->level); // level
328 
329  put_bits(&s->pb, 1, s->progressive_sequence);
330  put_bits(&s->pb, 2, s->chroma_format);
331  put_bits(&s->pb, 2, s->width >> 12);
332  put_bits(&s->pb, 2, s->height >> 12);
333  put_bits(&s->pb, 12, v >> 18); // bitrate ext
334  put_bits(&s->pb, 1, 1); // marker
335  put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
336  put_bits(&s->pb, 1, s->low_delay);
337  put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
338  put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
339 
341  if (side_data) {
342  AVPanScan *pan_scan = (AVPanScan *)side_data->data;
343  if (pan_scan->width && pan_scan->height) {
344  width = pan_scan->width >> 4;
345  height = pan_scan->height >> 4;
346  }
347  }
348 
349  use_seq_disp_ext = (width != s->width ||
350  height != s->height ||
355 
356  if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
358  put_bits(&s->pb, 4, 2); // sequence display extension
359  put_bits(&s->pb, 3, s->video_format); // video_format
360  put_bits(&s->pb, 1, 1); // colour_description
361  put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
362  put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
363  put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
364  put_bits(&s->pb, 14, width); // display_horizontal_size
365  put_bits(&s->pb, 1, 1); // marker_bit
366  put_bits(&s->pb, 14, height); // display_vertical_size
367  put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
368  }
369  }
370 
372  put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
373  /* time code: we must convert from the real frame rate to a
374  * fake MPEG frame rate in case of low frame rate */
375  fps = (framerate.num + framerate.den / 2) / framerate.den;
376  time_code = s->current_picture_ptr->f->coded_picture_number +
378 
380 
382  if (s->drop_frame_timecode)
383  time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
384 
385  put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
386  put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
387  put_bits(&s->pb, 1, 1);
388  put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
389  put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
391  put_bits(&s->pb, 1, 0); // broken link
392  }
393 }
394 
395 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
396 {
397  while (run >= 33) {
398  put_bits(&s->pb, 11, 0x008);
399  run -= 33;
400  }
402  ff_mpeg12_mbAddrIncrTable[run][0]);
403 }
404 
406 {
407  put_bits(&s->pb, 5, s->qscale);
408 }
409 
411 {
412  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
413  put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
414  /* slice_vertical_position_extension */
415  put_bits(&s->pb, 3, s->mb_y >> 7);
416  } else {
418  }
419  put_qscale(s);
420  /* slice extra information */
421  put_bits(&s->pb, 1, 0);
422 }
423 
425 {
426  AVFrameSideData *side_data;
428 
429  /* MPEG-1 picture header */
431  /* temporal reference */
432 
433  // RAL: s->picture_number instead of s->fake_picture_number
434  put_bits(&s->pb, 10,
435  (s->picture_number - s->gop_picture_number) & 0x3ff);
436  put_bits(&s->pb, 3, s->pict_type);
437 
438  s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
439  put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
440 
441  // RAL: Forward f_code also needed for B-frames
442  if (s->pict_type == AV_PICTURE_TYPE_P ||
444  put_bits(&s->pb, 1, 0); /* half pel coordinates */
446  put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
447  else
448  put_bits(&s->pb, 3, 7); /* forward_f_code */
449  }
450 
451  // RAL: Backward f_code necessary for B-frames
452  if (s->pict_type == AV_PICTURE_TYPE_B) {
453  put_bits(&s->pb, 1, 0); /* half pel coordinates */
455  put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
456  else
457  put_bits(&s->pb, 3, 7); /* backward_f_code */
458  }
459 
460  put_bits(&s->pb, 1, 0); /* extra bit picture */
461 
462  s->frame_pred_frame_dct = 1;
463  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
465  put_bits(&s->pb, 4, 8); /* pic ext */
466  if (s->pict_type == AV_PICTURE_TYPE_P ||
468  put_bits(&s->pb, 4, s->f_code);
469  put_bits(&s->pb, 4, s->f_code);
470  } else {
471  put_bits(&s->pb, 8, 255);
472  }
473  if (s->pict_type == AV_PICTURE_TYPE_B) {
474  put_bits(&s->pb, 4, s->b_code);
475  put_bits(&s->pb, 4, s->b_code);
476  } else {
477  put_bits(&s->pb, 8, 255);
478  }
479  put_bits(&s->pb, 2, s->intra_dc_precision);
480 
482  put_bits(&s->pb, 2, s->picture_structure);
483  if (s->progressive_sequence)
484  put_bits(&s->pb, 1, 0); /* no repeat */
485  else
487  /* XXX: optimize the generation of this flag with entropy measures */
489 
490  put_bits(&s->pb, 1, s->frame_pred_frame_dct);
492  put_bits(&s->pb, 1, s->q_scale_type);
493  put_bits(&s->pb, 1, s->intra_vlc_format);
494  put_bits(&s->pb, 1, s->alternate_scan);
495  put_bits(&s->pb, 1, s->repeat_first_field);
497  /* chroma_420_type */
498  put_bits(&s->pb, 1, s->chroma_format ==
499  CHROMA_420 ? s->progressive_frame : 0);
500  put_bits(&s->pb, 1, s->progressive_frame);
501  put_bits(&s->pb, 1, 0); /* composite_display_flag */
502  }
503  if (s->scan_offset) {
504  int i;
505 
507  for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
509  }
512  if (side_data) {
513  AVStereo3D *stereo = (AVStereo3D *)side_data->data;
514  uint8_t fpa_type;
515 
516  switch (stereo->type) {
518  fpa_type = 0x03;
519  break;
521  fpa_type = 0x04;
522  break;
523  case AV_STEREO3D_2D:
524  fpa_type = 0x08;
525  break;
527  fpa_type = 0x23;
528  break;
529  default:
530  fpa_type = 0;
531  break;
532  }
533 
534  if (fpa_type != 0) {
536  put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
537  put_bits(&s->pb, 8, 'P');
538  put_bits(&s->pb, 8, '3');
539  put_bits(&s->pb, 8, 'D');
540  put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
541 
542  put_bits(&s->pb, 1, 1); // reserved_bit
543  put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
544  put_bits(&s->pb, 8, 0x04); // reserved_data[0]
545  put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
546  }
547  }
548 
549  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->a53_cc) {
552  if (side_data) {
553  if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
554  int i = 0;
555 
557 
558  put_bits(&s->pb, 8, 'G'); // user_identifier
559  put_bits(&s->pb, 8, 'A');
560  put_bits(&s->pb, 8, '9');
561  put_bits(&s->pb, 8, '4');
562  put_bits(&s->pb, 8, 3); // user_data_type_code
563  put_bits(&s->pb, 8,
564  (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
565  put_bits(&s->pb, 8, 0xff); // em_data
566 
567  for (i = 0; i < side_data->size; i++)
568  put_bits(&s->pb, 8, side_data->data[i]);
569 
570  put_bits(&s->pb, 8, 0xff); // marker_bits
571  } else {
573  "Warning Closed Caption size (%d) can not exceed 93 bytes "
574  "and must be a multiple of 3\n", side_data->size);
575  }
576  }
577  }
578 
579  s->mb_y = 0;
581 }
582 
583 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
584  int has_mv, int field_motion)
585 {
586  put_bits(&s->pb, n, bits);
587  if (!s->frame_pred_frame_dct) {
588  if (has_mv)
589  /* motion_type: frame/field */
590  put_bits(&s->pb, 2, 2 - field_motion);
591  put_bits(&s->pb, 1, s->interlaced_dct);
592  }
593 }
594 
595 // RAL: Parameter added: f_or_b_code
596 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
597 {
598  if (val == 0) {
599  /* zero vector */
600  put_bits(&s->pb,
603  } else {
604  int code, sign, bits;
605  int bit_size = f_or_b_code - 1;
606  int range = 1 << bit_size;
607  /* modulo encoding */
608  val = sign_extend(val, 5 + bit_size);
609 
610  if (val >= 0) {
611  val--;
612  code = (val >> bit_size) + 1;
613  bits = val & (range - 1);
614  sign = 0;
615  } else {
616  val = -val;
617  val--;
618  code = (val >> bit_size) + 1;
619  bits = val & (range - 1);
620  sign = 1;
621  }
622 
623  av_assert2(code > 0 && code <= 16);
624 
625  put_bits(&s->pb,
628 
629  put_bits(&s->pb, 1, sign);
630  if (bit_size > 0)
631  put_bits(&s->pb, bit_size, bits);
632  }
633 }
634 
635 static inline void encode_dc(MpegEncContext *s, int diff, int component)
636 {
637  unsigned int diff_u = diff + 255;
638  if (diff_u >= 511) {
639  int index;
640 
641  if (diff < 0) {
642  index = av_log2_16bit(-2 * diff);
643  diff--;
644  } else {
645  index = av_log2_16bit(2 * diff);
646  }
647  if (component == 0)
648  put_bits(&s->pb,
649  ff_mpeg12_vlc_dc_lum_bits[index] + index,
650  (ff_mpeg12_vlc_dc_lum_code[index] << index) +
651  av_mod_uintp2(diff, index));
652  else
653  put_bits(&s->pb,
654  ff_mpeg12_vlc_dc_chroma_bits[index] + index,
655  (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
656  av_mod_uintp2(diff, index));
657  } else {
658  if (component == 0)
659  put_bits(&s->pb,
660  mpeg1_lum_dc_uni[diff + 255] & 0xFF,
661  mpeg1_lum_dc_uni[diff + 255] >> 8);
662  else
663  put_bits(&s->pb,
664  mpeg1_chr_dc_uni[diff + 255] & 0xFF,
665  mpeg1_chr_dc_uni[diff + 255] >> 8);
666  }
667 }
668 
669 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
670 {
671  int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
672  int code, component;
673  const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
674 
675  last_index = s->block_last_index[n];
676 
677  /* DC coef */
678  if (s->mb_intra) {
679  component = (n <= 3 ? 0 : (n & 1) + 1);
680  dc = block[0]; /* overflow is impossible */
681  diff = dc - s->last_dc[component];
682  encode_dc(s, diff, component);
683  s->last_dc[component] = dc;
684  i = 1;
685  if (s->intra_vlc_format)
686  table_vlc = ff_rl_mpeg2.table_vlc;
687  } else {
688  /* encode the first coefficient: needs to be done here because
689  * it is handled slightly differently */
690  level = block[0];
691  if (abs(level) == 1) {
692  code = ((uint32_t)level >> 31); /* the sign bit */
693  put_bits(&s->pb, 2, code | 0x02);
694  i = 1;
695  } else {
696  i = 0;
697  last_non_zero = -1;
698  goto next_coef;
699  }
700  }
701 
702  /* now quantify & encode AC coefs */
703  last_non_zero = i - 1;
704 
705  for (; i <= last_index; i++) {
706  j = s->intra_scantable.permutated[i];
707  level = block[j];
708 
709 next_coef:
710  /* encode using VLC */
711  if (level != 0) {
712  run = i - last_non_zero - 1;
713 
714  alevel = level;
715  MASK_ABS(sign, alevel);
716  sign &= 1;
717 
718  if (alevel <= mpeg1_max_level[0][run]) {
719  code = mpeg1_index_run[0][run] + alevel - 1;
720  /* store the VLC & sign at once */
721  put_bits(&s->pb, table_vlc[code][1] + 1,
722  (table_vlc[code][0] << 1) + sign);
723  } else {
724  /* escape seems to be pretty rare <5% so I do not optimize it */
725  put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
726  /* escape: only clip in this case */
727  put_bits(&s->pb, 6, run);
728  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
729  if (alevel < 128) {
730  put_sbits(&s->pb, 8, level);
731  } else {
732  if (level < 0)
733  put_bits(&s->pb, 16, 0x8001 + level + 255);
734  else
735  put_sbits(&s->pb, 16, level);
736  }
737  } else {
738  put_sbits(&s->pb, 12, level);
739  }
740  }
741  last_non_zero = i;
742  }
743  }
744  /* end of block */
745  put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
746 }
747 
749  int16_t block[8][64],
750  int motion_x, int motion_y,
751  int mb_block_count)
752 {
753  int i, cbp;
754  const int mb_x = s->mb_x;
755  const int mb_y = s->mb_y;
756  const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
757 
758  /* compute cbp */
759  cbp = 0;
760  for (i = 0; i < mb_block_count; i++)
761  if (s->block_last_index[i] >= 0)
762  cbp |= 1 << (mb_block_count - 1 - i);
763 
764  if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
765  (mb_x != s->mb_width - 1 ||
766  (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
767  ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
768  (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
769  (((s->mv_dir & MV_DIR_FORWARD)
770  ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
771  (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
772  ((s->mv_dir & MV_DIR_BACKWARD)
773  ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
774  (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
775  s->mb_skip_run++;
776  s->qscale -= s->dquant;
777  s->skip_count++;
778  s->misc_bits++;
779  s->last_bits++;
780  if (s->pict_type == AV_PICTURE_TYPE_P) {
781  s->last_mv[0][0][0] =
782  s->last_mv[0][0][1] =
783  s->last_mv[0][1][0] =
784  s->last_mv[0][1][1] = 0;
785  }
786  } else {
787  if (first_mb) {
788  av_assert0(s->mb_skip_run == 0);
789  encode_mb_skip_run(s, s->mb_x);
790  } else {
792  }
793 
794  if (s->pict_type == AV_PICTURE_TYPE_I) {
795  if (s->dquant && cbp) {
796  /* macroblock_type: macroblock_quant = 1 */
797  put_mb_modes(s, 2, 1, 0, 0);
798  put_qscale(s);
799  } else {
800  /* macroblock_type: macroblock_quant = 0 */
801  put_mb_modes(s, 1, 1, 0, 0);
802  s->qscale -= s->dquant;
803  }
804  s->misc_bits += get_bits_diff(s);
805  s->i_count++;
806  } else if (s->mb_intra) {
807  if (s->dquant && cbp) {
808  put_mb_modes(s, 6, 0x01, 0, 0);
809  put_qscale(s);
810  } else {
811  put_mb_modes(s, 5, 0x03, 0, 0);
812  s->qscale -= s->dquant;
813  }
814  s->misc_bits += get_bits_diff(s);
815  s->i_count++;
816  memset(s->last_mv, 0, sizeof(s->last_mv));
817  } else if (s->pict_type == AV_PICTURE_TYPE_P) {
818  if (s->mv_type == MV_TYPE_16X16) {
819  if (cbp != 0) {
820  if ((motion_x | motion_y) == 0) {
821  if (s->dquant) {
822  /* macroblock_pattern & quant */
823  put_mb_modes(s, 5, 1, 0, 0);
824  put_qscale(s);
825  } else {
826  /* macroblock_pattern only */
827  put_mb_modes(s, 2, 1, 0, 0);
828  }
829  s->misc_bits += get_bits_diff(s);
830  } else {
831  if (s->dquant) {
832  put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
833  put_qscale(s);
834  } else {
835  put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
836  }
837  s->misc_bits += get_bits_diff(s);
838  // RAL: f_code parameter added
840  motion_x - s->last_mv[0][0][0],
841  s->f_code);
842  // RAL: f_code parameter added
844  motion_y - s->last_mv[0][0][1],
845  s->f_code);
846  s->mv_bits += get_bits_diff(s);
847  }
848  } else {
849  put_bits(&s->pb, 3, 1); /* motion only */
850  if (!s->frame_pred_frame_dct)
851  put_bits(&s->pb, 2, 2); /* motion_type: frame */
852  s->misc_bits += get_bits_diff(s);
853  // RAL: f_code parameter added
855  motion_x - s->last_mv[0][0][0],
856  s->f_code);
857  // RAL: f_code parameter added
859  motion_y - s->last_mv[0][0][1],
860  s->f_code);
861  s->qscale -= s->dquant;
862  s->mv_bits += get_bits_diff(s);
863  }
864  s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
865  s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
866  } else {
868 
869  if (cbp) {
870  if (s->dquant) {
871  put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
872  put_qscale(s);
873  } else {
874  put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
875  }
876  } else {
877  put_bits(&s->pb, 3, 1); /* motion only */
878  put_bits(&s->pb, 2, 1); /* motion_type: field */
879  s->qscale -= s->dquant;
880  }
881  s->misc_bits += get_bits_diff(s);
882  for (i = 0; i < 2; i++) {
883  put_bits(&s->pb, 1, s->field_select[0][i]);
885  s->mv[0][i][0] - s->last_mv[0][i][0],
886  s->f_code);
888  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
889  s->f_code);
890  s->last_mv[0][i][0] = s->mv[0][i][0];
891  s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
892  }
893  s->mv_bits += get_bits_diff(s);
894  }
895  if (cbp) {
896  if (s->chroma_y_shift) {
897  put_bits(&s->pb,
898  ff_mpeg12_mbPatTable[cbp][1],
899  ff_mpeg12_mbPatTable[cbp][0]);
900  } else {
901  put_bits(&s->pb,
902  ff_mpeg12_mbPatTable[cbp >> 2][1],
903  ff_mpeg12_mbPatTable[cbp >> 2][0]);
904  put_sbits(&s->pb, 2, cbp);
905  }
906  }
907  s->f_count++;
908  } else {
909  if (s->mv_type == MV_TYPE_16X16) {
910  if (cbp) { // With coded bloc pattern
911  if (s->dquant) {
912  if (s->mv_dir == MV_DIR_FORWARD)
913  put_mb_modes(s, 6, 3, 1, 0);
914  else
915  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
916  put_qscale(s);
917  } else {
918  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
919  }
920  } else { // No coded bloc pattern
921  put_bits(&s->pb, 5 - s->mv_dir, 2);
922  if (!s->frame_pred_frame_dct)
923  put_bits(&s->pb, 2, 2); /* motion_type: frame */
924  s->qscale -= s->dquant;
925  }
926  s->misc_bits += get_bits_diff(s);
927  if (s->mv_dir & MV_DIR_FORWARD) {
929  s->mv[0][0][0] - s->last_mv[0][0][0],
930  s->f_code);
932  s->mv[0][0][1] - s->last_mv[0][0][1],
933  s->f_code);
934  s->last_mv[0][0][0] =
935  s->last_mv[0][1][0] = s->mv[0][0][0];
936  s->last_mv[0][0][1] =
937  s->last_mv[0][1][1] = s->mv[0][0][1];
938  s->f_count++;
939  }
940  if (s->mv_dir & MV_DIR_BACKWARD) {
942  s->mv[1][0][0] - s->last_mv[1][0][0],
943  s->b_code);
945  s->mv[1][0][1] - s->last_mv[1][0][1],
946  s->b_code);
947  s->last_mv[1][0][0] =
948  s->last_mv[1][1][0] = s->mv[1][0][0];
949  s->last_mv[1][0][1] =
950  s->last_mv[1][1][1] = s->mv[1][0][1];
951  s->b_count++;
952  }
953  } else {
956  if (cbp) { // With coded bloc pattern
957  if (s->dquant) {
958  if (s->mv_dir == MV_DIR_FORWARD)
959  put_mb_modes(s, 6, 3, 1, 1);
960  else
961  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
962  put_qscale(s);
963  } else {
964  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
965  }
966  } else { // No coded bloc pattern
967  put_bits(&s->pb, 5 - s->mv_dir, 2);
968  put_bits(&s->pb, 2, 1); /* motion_type: field */
969  s->qscale -= s->dquant;
970  }
971  s->misc_bits += get_bits_diff(s);
972  if (s->mv_dir & MV_DIR_FORWARD) {
973  for (i = 0; i < 2; i++) {
974  put_bits(&s->pb, 1, s->field_select[0][i]);
976  s->mv[0][i][0] - s->last_mv[0][i][0],
977  s->f_code);
979  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
980  s->f_code);
981  s->last_mv[0][i][0] = s->mv[0][i][0];
982  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
983  }
984  s->f_count++;
985  }
986  if (s->mv_dir & MV_DIR_BACKWARD) {
987  for (i = 0; i < 2; i++) {
988  put_bits(&s->pb, 1, s->field_select[1][i]);
990  s->mv[1][i][0] - s->last_mv[1][i][0],
991  s->b_code);
993  s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
994  s->b_code);
995  s->last_mv[1][i][0] = s->mv[1][i][0];
996  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
997  }
998  s->b_count++;
999  }
1000  }
1001  s->mv_bits += get_bits_diff(s);
1002  if (cbp) {
1003  if (s->chroma_y_shift) {
1004  put_bits(&s->pb,
1005  ff_mpeg12_mbPatTable[cbp][1],
1006  ff_mpeg12_mbPatTable[cbp][0]);
1007  } else {
1008  put_bits(&s->pb,
1009  ff_mpeg12_mbPatTable[cbp >> 2][1],
1010  ff_mpeg12_mbPatTable[cbp >> 2][0]);
1011  put_sbits(&s->pb, 2, cbp);
1012  }
1013  }
1014  }
1015  for (i = 0; i < mb_block_count; i++)
1016  if (cbp & (1 << (mb_block_count - 1 - i)))
1017  mpeg1_encode_block(s, block[i], i);
1018  s->mb_skip_run = 0;
1019  if (s->mb_intra)
1020  s->i_tex_bits += get_bits_diff(s);
1021  else
1022  s->p_tex_bits += get_bits_diff(s);
1023  }
1024 }
1025 
1027  int motion_x, int motion_y)
1028 {
1029  if (s->chroma_format == CHROMA_420)
1030  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
1031  else
1032  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1033 }
1034 
1036 {
1037  static int done = 0;
1038 
1040 
1041  if (!done) {
1042  int f_code;
1043  int mv;
1044  int i;
1045 
1046  done = 1;
1049 
1050  for (i = 0; i < 64; i++) {
1053  }
1054 
1056  if (s->intra_vlc_format)
1058 
1059  /* build unified dc encoding tables */
1060  for (i = -255; i < 256; i++) {
1061  int adiff, index;
1062  int bits, code;
1063  int diff = i;
1064 
1065  adiff = FFABS(diff);
1066  if (diff < 0)
1067  diff--;
1068  index = av_log2(2 * adiff);
1069 
1071  code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1072  av_mod_uintp2(diff, index);
1073  mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1074 
1077  av_mod_uintp2(diff, index);
1078  mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1079  }
1080 
1081  for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1082  for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1083  int len;
1084 
1085  if (mv == 0) {
1086  len = ff_mpeg12_mbMotionVectorTable[0][1];
1087  } else {
1088  int val, bit_size, code;
1089 
1090  bit_size = f_code - 1;
1091 
1092  val = mv;
1093  if (val < 0)
1094  val = -val;
1095  val--;
1096  code = (val >> bit_size) + 1;
1097  if (code < 17)
1098  len = ff_mpeg12_mbMotionVectorTable[code][1] +
1099  1 + bit_size;
1100  else
1101  len = ff_mpeg12_mbMotionVectorTable[16][1] +
1102  2 + bit_size;
1103  }
1104 
1105  mv_penalty[f_code][mv + MAX_DMV] = len;
1106  }
1107 
1108 
1109  for (f_code = MAX_FCODE; f_code > 0; f_code--)
1110  for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1111  fcode_tab[mv + MAX_MV] = f_code;
1112  }
1113  s->me.mv_penalty = mv_penalty;
1114  s->fcode_tab = fcode_tab;
1115  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1116  s->min_qcoeff = -255;
1117  s->max_qcoeff = 255;
1118  } else {
1119  s->min_qcoeff = -2047;
1120  s->max_qcoeff = 2047;
1121  }
1122  if (s->intra_vlc_format) {
1123  s->intra_ac_vlc_length =
1125  } else {
1126  s->intra_ac_vlc_length =
1128  }
1129  s->inter_ac_vlc_length =
1131 }
1132 
1133 #define OFFSET(x) offsetof(MpegEncContext, x)
1134 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1135 #define COMMON_OPTS \
1136  { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1137  OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1138  { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1139  OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1140  { "drop_frame_timecode", "Timecode is in drop frame format.", \
1141  OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1142  { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1143  OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1144  { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1145  OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1146 
1147 static const AVOption mpeg1_options[] = {
1148  COMMON_OPTS
1150  { NULL },
1151 };
1152 
1153 static const AVOption mpeg2_options[] = {
1154  COMMON_OPTS
1155  { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1156  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1157  { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1158  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1159  { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1160  { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1161  { "video_format", "Video_format in the sequence_display_extension indicating the source of the video.", OFFSET(video_format), AV_OPT_TYPE_INT, { .i64 = VIDEO_FORMAT_UNSPECIFIED }, 0, 7, VE, "video_format" },
1162  { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1163  { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1164  { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1165  { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1166  { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1167  { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1169  { NULL },
1170 };
1171 
1172 #define mpeg12_class(x) \
1173 static const AVClass mpeg ## x ## _class = { \
1174  .class_name = "mpeg" # x "video encoder", \
1175  .item_name = av_default_item_name, \
1176  .option = mpeg ## x ## _options, \
1177  .version = LIBAVUTIL_VERSION_INT, \
1178 };
1179 
1181 mpeg12_class(2)
1182 
1184  .name = "mpeg1video",
1185  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1186  .type = AVMEDIA_TYPE_VIDEO,
1187  .id = AV_CODEC_ID_MPEG1VIDEO,
1188  .priv_data_size = sizeof(MpegEncContext),
1189  .init = encode_init,
1190  .encode2 = ff_mpv_encode_picture,
1191  .close = ff_mpv_encode_end,
1192  .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1193  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1194  AV_PIX_FMT_NONE },
1196  .priv_class = &mpeg1_class,
1197 };
1198 
1200  .name = "mpeg2video",
1201  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1202  .type = AVMEDIA_TYPE_VIDEO,
1203  .id = AV_CODEC_ID_MPEG2VIDEO,
1204  .priv_data_size = sizeof(MpegEncContext),
1205  .init = encode_init,
1206  .encode2 = ff_mpv_encode_picture,
1207  .close = ff_mpv_encode_end,
1208  .supported_framerates = ff_mpeg2_frame_rate_tab,
1209  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1211  AV_PIX_FMT_NONE },
1213  .priv_class = &mpeg2_class,
1214 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2633
av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
Definition: mpeg12enc.c:1035
static uint8_t uni_mpeg1_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:53
#define MASK_ABS(mask, level)
Definition: mathops.h:155
#define NULL
Definition: coverity.c:32
AVCodec ff_mpeg2video_encoder
Definition: mpeg12enc.c:1199
const char const char void * val
Definition: avisynth_c.h:863
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:463
int aspect_ratio_info
Definition: mpegvideo.h:402
int picture_number
Definition: mpegvideo.h:127
const AVRational ff_mpeg2_frame_rate_tab[]
Definition: mpeg12data.c:308
AVOption.
Definition: opt.h:246
uint8_t * fcode_tab
smallest fcode needed for each MV
Definition: mpegvideo.h:279
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:269
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
Definition: mpegvideo.h:278
static int find_frame_rate_index(MpegEncContext *s)
Definition: mpeg12enc.c:101
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:240
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:208
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define VIDEO_FORMAT_COMPONENT
Definition: mpegvideo.h:474
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
Definition: mpegvideo.h:154
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define MAX_MV
Definition: motion_est.h:35
int height
Definition: avcodec.h:1113
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:614
int num
Numerator.
Definition: rational.h:59
const unsigned char ff_mpeg12_vlc_dc_lum_bits[12]
Definition: mpeg12data.c:55
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:117
enum AVCodecID codec_id
Definition: mpegvideo.h:112
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:48
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1944
int scan_offset
reserve space for SVCD scan offset user data.
Definition: mpegvideo.h:494
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:308
mpegvideo header.
uint8_t permutated[64]
Definition: idctdsp.h:33
const uint16_t ff_mpeg12_vlc_dc_lum_code[12]
Definition: mpeg12data.c:52
Views are next to each other.
Definition: stereo3d.h:67
uint8_t run
Definition: svq3.c:206
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:311
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:318
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:71
int profile
profile
Definition: avcodec.h:2898
AVCodec.
Definition: avcodec.h:3481
#define MAX_FCODE
Definition: mpegutils.h:48
int framerate
Definition: h264_levels.c:65
uint8_t(* mv_penalty)[MAX_DMV *2+1]
bit amount needed to encode a MV
Definition: motion_est.h:93
int qscale
QP.
Definition: mpegvideo.h:204
RLTable.
Definition: rl.h:39
int field_select[2][2]
Definition: mpegvideo.h:277
Macro definitions for various function/variable attributes.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1688
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:734
static int16_t block[64]
Definition: dct.c:115
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:3019
#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:1006
#define VIDEO_FORMAT_NTSC
Definition: mpegvideo.h:476
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
Parse timecode representation (hh:mm:ss[:;.
Definition: timecode.c:194
AVRational mpeg2_frame_rate_ext
Definition: mpegvideo.h:218
uint8_t
#define av_cold
Definition: attributes.h:82
#define VIDEO_FORMAT_PAL
Definition: mpegvideo.h:475
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
static uint32_t mpeg1_lum_dc_uni[512]
Definition: mpeg12enc.c:58
AVOptions.
static void encode_mb_skip_run(MpegEncContext *s, int run)
Definition: mpeg12enc.c:395
RLTable ff_rl_mpeg2
Definition: mpeg12data.c:174
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:176
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
Definition: avcodec.h:2036
timecode is drop frame
Definition: timecode.h:36
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:374
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:352
static const AVOption mpeg1_options[]
Definition: mpeg12enc.c:1147
static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12enc.c:669
int interlaced_dct
Definition: mpegvideo.h:491
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:180
#define CHROMA_420
Definition: mpegvideo.h:483
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
#define VIDEO_FORMAT_UNSPECIFIED
Definition: mpegvideo.h:479
AVCodec ff_mpeg1video_encoder
int intra_dc_precision
Definition: mpegvideo.h:464
int repeat_first_field
Definition: mpegvideo.h:480
Structure to hold side data for an AVFrame.
Definition: frame.h:201
#define height
static int8_t mpeg1_max_level[2][64]
Definition: mpeg12enc.c:62
int start
timecode frame start (first base frame number)
Definition: timecode.h:42
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:46
#define VIDEO_FORMAT_SECAM
Definition: mpegvideo.h:477
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:129
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:55
static const uint8_t header[24]
Definition: sdr2.c:67
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:309
int dquant
qscale difference to prev qscale
Definition: mpegvideo.h:210
int gop_picture_number
index of the first picture of a GOP based on fake_pic_num & MPEG-1 specific
Definition: mpegvideo.h:451
#define av_log(a,...)
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2632
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:752
int intra_only
if true, only intra pictures are generated
Definition: mpegvideo.h:102
#define MAX_DMV
Definition: motion_est.h:37
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:185
static void put_mb_modes(MpegEncContext *s, int n, int bits, int has_mv, int field_motion)
Definition: mpeg12enc.c:583
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:316
int chroma_y_shift
Definition: mpegvideo.h:487
int strict_std_compliance
strictly follow the std (MPEG-4, ...)
Definition: mpegvideo.h:118
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:58
#define VIDEO_FORMAT_MAC
Definition: mpegvideo.h:478
const uint16_t ff_mpeg12_vlc_dc_chroma_code[12]
Definition: mpeg12data.c:59
static void encode_dc(MpegEncContext *s, int diff, int component)
Definition: mpeg12enc.c:635
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1645
uint8_t * buf
Definition: put_bits.h:38
simple assert() macros that are a bit more flexible than ISO C assert().
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:37
const char * name
Name of the codec implementation.
Definition: avcodec.h:3488
uint8_t bits
Definition: vp3data.h:202
int width
width and height in 1/16 pel
Definition: avcodec.h:1112
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:2527
static void mpeg1_encode_sequence_header(MpegEncContext *s)
Definition: mpeg12enc.c:240
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
Definition: mpeg12enc.c:596
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:70
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:356
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2428
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:312
#define mpeg12_class(x)
Definition: mpeg12enc.c:1172
int intra_vlc_format
Definition: mpegvideo.h:470
int progressive_frame
Definition: mpegvideo.h:489
uint8_t * vbv_delay_ptr
pointer to vbv_delay in the bitstream
Definition: mpegvideo.h:453
const uint16_t(* table_vlc)[2]
Definition: rl.h:42
static uint8_t fcode_tab[MAX_MV *2+1]
Definition: mpeg12enc.c:51
#define width
int width
picture width / height.
Definition: avcodec.h:1738
const unsigned char ff_mpeg12_vlc_dc_chroma_bits[12]
Definition: mpeg12data.c:62
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:184
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:2899
RLTable ff_rl_mpeg1
Definition: mpeg12data.c:166
int alternate_scan
Definition: mpegvideo.h:471
#define GOP_START_CODE
Definition: mpegvideo.h:69
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2179
static uint8_t uni_mpeg2_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:54
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
int level
level
Definition: avcodec.h:3018
#define VE
Definition: mpeg12enc.c:1134
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:86
MotionEstContext me
Definition: mpegvideo.h:282
int n
Definition: avisynth_c.h:760
#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:66
if(ret< 0)
Definition: vf_mcdeint.c:279
static void put_header(MpegEncContext *s, int header)
Definition: mpeg12enc.c:232
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
static void error(const char *err)
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
#define av_log2
Definition: intmath.h:83
static const uint8_t svcd_scan_offset_placeholder[]
Definition: mpeg12enc.c:45
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1041
static const int8_t mv[256][2]
Definition: 4xm.c:77
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
int frame_pred_frame_dct
Definition: mpegvideo.h:465
#define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE
timecode is in drop frame format.
Definition: avcodec.h:936
int av_timecode_adjust_ntsc_framenum2(int framenum, int fps)
Adjust frame number for NTSC drop frame time code.
Definition: timecode.c:34
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:263
int coded_picture_number
picture number in bitstream order
Definition: frame.h:409
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:180
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
int concealment_motion_vectors
Definition: mpegvideo.h:467
Libavcodec external API header.
Views are on top of each other.
Definition: stereo3d.h:79
char * tc_opt_str
timecode option string
Definition: mpegvideo.h:500
Timecode helpers header.
#define A53_MAX_CC_COUNT
Definition: mpeg12enc.c:64
#define abs(x)
Definition: cuda_runtime.h:35
main external API structure.
Definition: avcodec.h:1565
ScanTable intra_scantable
Definition: mpegvideo.h:91
#define USER_START_CODE
Definition: cavs.h:34
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:100
MPEG-1/2 tables.
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s, int16_t block[8][64], int motion_x, int motion_y, int mb_block_count)
Definition: mpeg12enc.c:748
uint8_t * data
Definition: frame.h:203
av_cold int ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: rl.c:39
int ff_mpv_encode_init(AVCodecContext *avctx)
uint8_t * inter_ac_vlc_length
Definition: mpegvideo.h:315
static uint8_t mpeg1_index_run[2][64]
Definition: mpeg12enc.c:61
int progressive_sequence
Definition: mpegvideo.h:456
uint16_t * intra_matrix
custom intra quantization matrix Must be allocated with the av_malloc() family of functions...
Definition: avcodec.h:2065
static uint8_t mv_penalty[MAX_FCODE+1][MAX_DMV *2+1]
Definition: mpeg12enc.c:50
int index
Definition: gxfenc.c:89
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2193
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2186
struct AVFrame * f
Definition: mpegpicture.h:46
#define COMMON_OPTS
Definition: mpeg12enc.c:1135
uint8_t * index_run[2]
encoding only
Definition: rl.h:45
#define OFFSET(x)
Definition: mpeg12enc.c:1133
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: mpeg12enc.c:424
int f_code
forward MV resolution
Definition: mpegvideo.h:238
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
uint16_t * inter_matrix
custom inter quantization matrix Must be allocated with the av_malloc() family of functions...
Definition: avcodec.h:2074
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:212
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:107
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> dc
#define av_log2_16bit
Definition: intmath.h:84
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
int last_mv_dir
last mv_dir, used for B-frame encoding
Definition: mpegvideo.h:452
void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64], int motion_x, int motion_y)
Definition: mpeg12enc.c:1026
Pan Scan area.
Definition: avcodec.h:1099
uint8_t level
Definition: svq3.c:207
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:276
static av_cold int encode_init(AVCodecContext *avctx)
Definition: mpeg12enc.c:140
MpegEncContext.
Definition: mpegvideo.h:81
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
struct AVCodecContext * avctx
Definition: mpegvideo.h:98
PutBitContext pb
bit output
Definition: mpegvideo.h:151
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:395
static av_always_inline void put_qscale(MpegEncContext *s)
Definition: mpeg12enc.c:405
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
static uint32_t mpeg1_chr_dc_uni[512]
Definition: mpeg12enc.c:59
static const AVOption mpeg2_options[]
Definition: mpeg12enc.c:1153
uint8_t ff_mpeg12_static_rl_table_store[2][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: mpeg12.c:44
int av_nearer_q(AVRational q, AVRational q1, AVRational q2)
Find which of the two rationals is closer to another rational.
Definition: rational.c:127
Bi-dir predicted.
Definition: avutil.h:276
Stereoscopic video.
const uint8_t ff_mpeg12_mbPatTable[64][2]
Definition: mpeg12data.c:221
int den
Denominator.
Definition: rational.h:60
int ff_mpv_encode_end(AVCodecContext *avctx)
void * priv_data
Definition: avcodec.h:1592
void ff_mpeg1_encode_slice_header(MpegEncContext *s)
Definition: mpeg12enc.c:410
#define PICT_FRAME
Definition: mpegutils.h:39
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:353
int frame_rate_index
Definition: mpegvideo.h:217
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int picture_structure
Definition: mpegvideo.h:461
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:85
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:447
int len
#define SEQ_START_CODE
Definition: mpegvideo.h:68
int drop_frame_timecode
timecode is in drop frame format.
Definition: mpegvideo.h:493
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:357
const uint8_t ff_mpeg12_mbAddrIncrTable[36][2]
Definition: mpeg12data.c:182
int64_t bit_rate
wanted bit rate
Definition: mpegvideo.h:103
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:373
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1652
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
const uint8_t ff_mpeg12_mbMotionVectorTable[17][2]
Definition: mpeg12data.c:288
#define PICTURE_START_CODE
Definition: mpegvideo.h:70
#define av_always_inline
Definition: attributes.h:39
#define AV_CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:918
int b_code
backward MV resolution for B-frames (MPEG-4)
Definition: mpegvideo.h:239
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
AVTimecode tc
timecode context
Definition: mpegvideo.h:501
uint32_t flags
flags such as drop frame, +24 hours support, ...
Definition: timecode.h:43
Stereoscopic 3d metadata.
Definition: frame.h:63
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2628
Predicted.
Definition: avutil.h:275
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2443
const AVRational ff_mpeg12_frame_rate_tab[]