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mpeg12enc.c
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1 /*
2  * MPEG-1/2 encoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * MPEG-1/2 encoder
26  */
27 
28 #include <stdint.h>
29 
30 #include "libavutil/attributes.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/log.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/timecode.h"
35 #include "libavutil/stereo3d.h"
36 
37 #include "avcodec.h"
38 #include "bytestream.h"
39 #include "mathops.h"
40 #include "mpeg12.h"
41 #include "mpeg12data.h"
42 #include "mpegutils.h"
43 #include "mpegvideo.h"
44 
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 static av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
65 {
66  int i;
67 
68  for (i = 0; i < 128; i++) {
69  int level = i - 64;
70  int run;
71  if (!level)
72  continue;
73  for (run = 0; run < 64; run++) {
74  int len, code;
75  int alevel = FFABS(level);
76 
77  if (alevel > rl->max_level[0][run])
78  code = 111; /* rl->n */
79  else
80  code = rl->index_run[0][run] + alevel - 1;
81 
82  if (code < 111) { /* rl->n */
83  /* length of VLC and sign */
84  len = rl->table_vlc[code][1] + 1;
85  } else {
86  len = rl->table_vlc[111 /* rl->n */][1] + 6;
87 
88  if (alevel < 128)
89  len += 8;
90  else
91  len += 16;
92  }
93 
94  uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
95  }
96  }
97 }
98 
100 {
101  int i;
102  AVRational bestq = (AVRational) {0, 0};
103  AVRational ext;
104  AVRational target = av_inv_q(s->avctx->time_base);
105 
106  for (i = 1; i < 14; i++) {
108  i >= 9)
109  break;
110 
111  for (ext.num=1; ext.num <= 4; ext.num++) {
112  for (ext.den=1; ext.den <= 32; ext.den++) {
114 
115  if (s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
116  continue;
117  if (av_gcd(ext.den, ext.num) != 1)
118  continue;
119 
120  if ( bestq.num==0
121  || av_nearer_q(target, bestq, q) < 0
122  || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
123  bestq = q;
124  s->frame_rate_index = i;
125  s->mpeg2_frame_rate_ext.num = ext.num;
126  s->mpeg2_frame_rate_ext.den = ext.den;
127  }
128  }
129  }
130  }
131 
132  if (av_cmp_q(target, bestq))
133  return -1;
134  else
135  return 0;
136 }
137 
139 {
140  MpegEncContext *s = avctx->priv_data;
141 
142  if (ff_mpv_encode_init(avctx) < 0)
143  return -1;
144 
145  if (find_frame_rate_index(s) < 0) {
147  av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
148  avctx->time_base.den, avctx->time_base.num);
149  return -1;
150  } else {
151  av_log(avctx, AV_LOG_INFO,
152  "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
153  avctx->time_base.den, avctx->time_base.num);
154  }
155  }
156 
157  if (avctx->profile == FF_PROFILE_UNKNOWN) {
158  if (avctx->level != FF_LEVEL_UNKNOWN) {
159  av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
160  return -1;
161  }
162  /* Main or 4:2:2 */
163  avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
164  }
165 
166  if (avctx->level == FF_LEVEL_UNKNOWN) {
167  if (avctx->profile == 0) { /* 4:2:2 */
168  if (avctx->width <= 720 && avctx->height <= 608)
169  avctx->level = 5; /* Main */
170  else
171  avctx->level = 2; /* High */
172  } else {
173  if (avctx->profile != 1 && s->chroma_format != CHROMA_420) {
174  av_log(avctx, AV_LOG_ERROR,
175  "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
176  return -1;
177  }
178  if (avctx->width <= 720 && avctx->height <= 576)
179  avctx->level = 8; /* Main */
180  else if (avctx->width <= 1440)
181  avctx->level = 6; /* High 1440 */
182  else
183  avctx->level = 4; /* High */
184  }
185  }
186 
187  if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
188  av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
189  return AVERROR(EINVAL);
190  }
191 
193  if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
194  av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
195  "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
196  return AVERROR(EINVAL);
197  }
198  }
199 
201  if (s->drop_frame_timecode)
203  if (s->drop_frame_timecode && s->frame_rate_index != 4) {
204  av_log(avctx, AV_LOG_ERROR,
205  "Drop frame time code only allowed with 1001/30000 fps\n");
206  return -1;
207  }
208 
209 #if FF_API_PRIVATE_OPT
211  if (avctx->timecode_frame_start)
214 #endif
215 
216  if (s->tc_opt_str) {
218  int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
219  if (ret < 0)
220  return ret;
222  s->timecode_frame_start = s->tc.start;
223  } else {
224  s->timecode_frame_start = 0; // default is -1
225  }
226 
227  return 0;
228 }
229 
230 static void put_header(MpegEncContext *s, int header)
231 {
233  put_bits(&s->pb, 16, header >> 16);
234  put_sbits(&s->pb, 16, header);
235 }
236 
237 /* put sequence header if needed */
239 {
240  unsigned int vbv_buffer_size, fps, v;
241  int i, constraint_parameter_flag;
242  uint64_t time_code;
243  int64_t best_aspect_error = INT64_MAX;
244  AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
245 
246  if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
247  aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
248 
249  if (s->current_picture.f->key_frame) {
251 
252  /* MPEG-1 header repeated every GOP */
254 
255  put_sbits(&s->pb, 12, s->width & 0xFFF);
256  put_sbits(&s->pb, 12, s->height & 0xFFF);
257 
258  for (i = 1; i < 15; i++) {
259  int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
260  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
261  error -= (1LL<<32) / ff_mpeg1_aspect[i];
262  else
263  error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
264 
265  error = FFABS(error);
266 
267  if (error - 2 <= best_aspect_error) {
268  best_aspect_error = error;
269  s->aspect_ratio_info = i;
270  }
271  }
272 
273  put_bits(&s->pb, 4, s->aspect_ratio_info);
274  put_bits(&s->pb, 4, s->frame_rate_index);
275 
276  if (s->avctx->rc_max_rate) {
277  v = (s->avctx->rc_max_rate + 399) / 400;
278  if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
279  v = 0x3ffff;
280  } else {
281  v = 0x3FFFF;
282  }
283 
284  if (s->avctx->rc_buffer_size)
285  vbv_buffer_size = s->avctx->rc_buffer_size;
286  else
287  /* VBV calculation: Scaled so that a VCD has the proper
288  * VBV size of 40 kilobytes */
289  vbv_buffer_size = ((20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
290  vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
291 
292  put_sbits(&s->pb, 18, v);
293  put_bits(&s->pb, 1, 1); // marker
294  put_sbits(&s->pb, 10, vbv_buffer_size);
295 
296  constraint_parameter_flag =
297  s->width <= 768 &&
298  s->height <= 576 &&
299  s->mb_width * s->mb_height <= 396 &&
300  s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
301  framerate.num <= framerate.den * 30 &&
302  s->avctx->me_range &&
303  s->avctx->me_range < 128 &&
304  vbv_buffer_size <= 20 &&
305  v <= 1856000 / 400 &&
307 
308  put_bits(&s->pb, 1, constraint_parameter_flag);
309 
312 
313  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
314  AVFrameSideData *side_data;
315  int width = s->width;
316  int height = s->height;
317  int use_seq_disp_ext;
318 
320  put_bits(&s->pb, 4, 1); // seq ext
321 
322  put_bits(&s->pb, 1, s->avctx->profile == 0); // escx 1 for 4:2:2 profile
323 
324  put_bits(&s->pb, 3, s->avctx->profile); // profile
325  put_bits(&s->pb, 4, s->avctx->level); // level
326 
327  put_bits(&s->pb, 1, s->progressive_sequence);
328  put_bits(&s->pb, 2, s->chroma_format);
329  put_bits(&s->pb, 2, s->width >> 12);
330  put_bits(&s->pb, 2, s->height >> 12);
331  put_bits(&s->pb, 12, v >> 18); // bitrate ext
332  put_bits(&s->pb, 1, 1); // marker
333  put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
334  put_bits(&s->pb, 1, s->low_delay);
335  put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
336  put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
337 
339  if (side_data) {
340  AVPanScan *pan_scan = (AVPanScan *)side_data->data;
341  if (pan_scan->width && pan_scan->height) {
342  width = pan_scan->width >> 4;
343  height = pan_scan->height >> 4;
344  }
345  }
346 
347  use_seq_disp_ext = (width != s->width ||
348  height != s->height ||
353 
354  if (s->seq_disp_ext == 1 || (s->seq_disp_ext == -1 && use_seq_disp_ext)) {
356  put_bits(&s->pb, 4, 2); // sequence display extension
357  put_bits(&s->pb, 3, s->video_format); // video_format
358  put_bits(&s->pb, 1, 1); // colour_description
359  put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
360  put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
361  put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
362  put_bits(&s->pb, 14, width); // display_horizontal_size
363  put_bits(&s->pb, 1, 1); // marker_bit
364  put_bits(&s->pb, 14, height); // display_vertical_size
365  put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
366  }
367  }
368 
370  put_bits(&s->pb, 1, s->drop_frame_timecode); // drop frame flag
371  /* time code: we must convert from the real frame rate to a
372  * fake MPEG frame rate in case of low frame rate */
373  fps = (framerate.num + framerate.den / 2) / framerate.den;
374  time_code = s->current_picture_ptr->f->coded_picture_number +
376 
378 
380  if (s->drop_frame_timecode)
381  time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
382 
383  put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
384  put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
385  put_bits(&s->pb, 1, 1);
386  put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
387  put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
389  put_bits(&s->pb, 1, 0); // broken link
390  }
391 }
392 
393 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
394 {
395  while (run >= 33) {
396  put_bits(&s->pb, 11, 0x008);
397  run -= 33;
398  }
400  ff_mpeg12_mbAddrIncrTable[run][0]);
401 }
402 
404 {
405  put_bits(&s->pb, 5, s->qscale);
406 }
407 
409 {
410  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
411  put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
412  /* slice_vertical_position_extension */
413  put_bits(&s->pb, 3, s->mb_y >> 7);
414  } else {
416  }
417  put_qscale(s);
418  /* slice extra information */
419  put_bits(&s->pb, 1, 0);
420 }
421 
423 {
424  AVFrameSideData *side_data;
426 
427  /* MPEG-1 picture header */
429  /* temporal reference */
430 
431  // RAL: s->picture_number instead of s->fake_picture_number
432  put_bits(&s->pb, 10,
433  (s->picture_number - s->gop_picture_number) & 0x3ff);
434  put_bits(&s->pb, 3, s->pict_type);
435 
436  s->vbv_delay_ptr = s->pb.buf + put_bits_count(&s->pb) / 8;
437  put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
438 
439  // RAL: Forward f_code also needed for B-frames
440  if (s->pict_type == AV_PICTURE_TYPE_P ||
442  put_bits(&s->pb, 1, 0); /* half pel coordinates */
444  put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
445  else
446  put_bits(&s->pb, 3, 7); /* forward_f_code */
447  }
448 
449  // RAL: Backward f_code necessary for B-frames
450  if (s->pict_type == AV_PICTURE_TYPE_B) {
451  put_bits(&s->pb, 1, 0); /* half pel coordinates */
453  put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
454  else
455  put_bits(&s->pb, 3, 7); /* backward_f_code */
456  }
457 
458  put_bits(&s->pb, 1, 0); /* extra bit picture */
459 
460  s->frame_pred_frame_dct = 1;
461  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
463  put_bits(&s->pb, 4, 8); /* pic ext */
464  if (s->pict_type == AV_PICTURE_TYPE_P ||
466  put_bits(&s->pb, 4, s->f_code);
467  put_bits(&s->pb, 4, s->f_code);
468  } else {
469  put_bits(&s->pb, 8, 255);
470  }
471  if (s->pict_type == AV_PICTURE_TYPE_B) {
472  put_bits(&s->pb, 4, s->b_code);
473  put_bits(&s->pb, 4, s->b_code);
474  } else {
475  put_bits(&s->pb, 8, 255);
476  }
477  put_bits(&s->pb, 2, s->intra_dc_precision);
478 
480  put_bits(&s->pb, 2, s->picture_structure);
481  if (s->progressive_sequence)
482  put_bits(&s->pb, 1, 0); /* no repeat */
483  else
485  /* XXX: optimize the generation of this flag with entropy measures */
487 
488  put_bits(&s->pb, 1, s->frame_pred_frame_dct);
490  put_bits(&s->pb, 1, s->q_scale_type);
491  put_bits(&s->pb, 1, s->intra_vlc_format);
492  put_bits(&s->pb, 1, s->alternate_scan);
493  put_bits(&s->pb, 1, s->repeat_first_field);
495  /* chroma_420_type */
496  put_bits(&s->pb, 1, s->chroma_format ==
497  CHROMA_420 ? s->progressive_frame : 0);
498  put_bits(&s->pb, 1, s->progressive_frame);
499  put_bits(&s->pb, 1, 0); /* composite_display_flag */
500  }
501  if (s->scan_offset) {
502  int i;
503 
505  for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
507  }
510  if (side_data) {
511  AVStereo3D *stereo = (AVStereo3D *)side_data->data;
512  uint8_t fpa_type;
513 
514  switch (stereo->type) {
516  fpa_type = 0x03;
517  break;
519  fpa_type = 0x04;
520  break;
521  case AV_STEREO3D_2D:
522  fpa_type = 0x08;
523  break;
525  fpa_type = 0x23;
526  break;
527  default:
528  fpa_type = 0;
529  break;
530  }
531 
532  if (fpa_type != 0) {
534  put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
535  put_bits(&s->pb, 8, 'P');
536  put_bits(&s->pb, 8, '3');
537  put_bits(&s->pb, 8, 'D');
538  put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
539 
540  put_bits(&s->pb, 1, 1); // reserved_bit
541  put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
542  put_bits(&s->pb, 8, 0x04); // reserved_data[0]
543  put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
544  }
545  }
546 
547  s->mb_y = 0;
549 }
550 
551 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
552  int has_mv, int field_motion)
553 {
554  put_bits(&s->pb, n, bits);
555  if (!s->frame_pred_frame_dct) {
556  if (has_mv)
557  /* motion_type: frame/field */
558  put_bits(&s->pb, 2, 2 - field_motion);
559  put_bits(&s->pb, 1, s->interlaced_dct);
560  }
561 }
562 
563 // RAL: Parameter added: f_or_b_code
564 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
565 {
566  if (val == 0) {
567  /* zero vector */
568  put_bits(&s->pb,
571  } else {
572  int code, sign, bits;
573  int bit_size = f_or_b_code - 1;
574  int range = 1 << bit_size;
575  /* modulo encoding */
576  val = sign_extend(val, 5 + bit_size);
577 
578  if (val >= 0) {
579  val--;
580  code = (val >> bit_size) + 1;
581  bits = val & (range - 1);
582  sign = 0;
583  } else {
584  val = -val;
585  val--;
586  code = (val >> bit_size) + 1;
587  bits = val & (range - 1);
588  sign = 1;
589  }
590 
591  av_assert2(code > 0 && code <= 16);
592 
593  put_bits(&s->pb,
596 
597  put_bits(&s->pb, 1, sign);
598  if (bit_size > 0)
599  put_bits(&s->pb, bit_size, bits);
600  }
601 }
602 
603 static inline void encode_dc(MpegEncContext *s, int diff, int component)
604 {
605  unsigned int diff_u = diff + 255;
606  if (diff_u >= 511) {
607  int index;
608 
609  if (diff < 0) {
610  index = av_log2_16bit(-2 * diff);
611  diff--;
612  } else {
613  index = av_log2_16bit(2 * diff);
614  }
615  if (component == 0)
616  put_bits(&s->pb,
617  ff_mpeg12_vlc_dc_lum_bits[index] + index,
618  (ff_mpeg12_vlc_dc_lum_code[index] << index) +
619  av_mod_uintp2(diff, index));
620  else
621  put_bits(&s->pb,
622  ff_mpeg12_vlc_dc_chroma_bits[index] + index,
623  (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
624  av_mod_uintp2(diff, index));
625  } else {
626  if (component == 0)
627  put_bits(&s->pb,
628  mpeg1_lum_dc_uni[diff + 255] & 0xFF,
629  mpeg1_lum_dc_uni[diff + 255] >> 8);
630  else
631  put_bits(&s->pb,
632  mpeg1_chr_dc_uni[diff + 255] & 0xFF,
633  mpeg1_chr_dc_uni[diff + 255] >> 8);
634  }
635 }
636 
637 static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
638 {
639  int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
640  int code, component;
641  const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
642 
643  last_index = s->block_last_index[n];
644 
645  /* DC coef */
646  if (s->mb_intra) {
647  component = (n <= 3 ? 0 : (n & 1) + 1);
648  dc = block[0]; /* overflow is impossible */
649  diff = dc - s->last_dc[component];
650  encode_dc(s, diff, component);
651  s->last_dc[component] = dc;
652  i = 1;
653  if (s->intra_vlc_format)
654  table_vlc = ff_rl_mpeg2.table_vlc;
655  } else {
656  /* encode the first coefficient: needs to be done here because
657  * it is handled slightly differently */
658  level = block[0];
659  if (abs(level) == 1) {
660  code = ((uint32_t)level >> 31); /* the sign bit */
661  put_bits(&s->pb, 2, code | 0x02);
662  i = 1;
663  } else {
664  i = 0;
665  last_non_zero = -1;
666  goto next_coef;
667  }
668  }
669 
670  /* now quantify & encode AC coefs */
671  last_non_zero = i - 1;
672 
673  for (; i <= last_index; i++) {
674  j = s->intra_scantable.permutated[i];
675  level = block[j];
676 
677 next_coef:
678  /* encode using VLC */
679  if (level != 0) {
680  run = i - last_non_zero - 1;
681 
682  alevel = level;
683  MASK_ABS(sign, alevel);
684  sign &= 1;
685 
686  if (alevel <= mpeg1_max_level[0][run]) {
687  code = mpeg1_index_run[0][run] + alevel - 1;
688  /* store the VLC & sign at once */
689  put_bits(&s->pb, table_vlc[code][1] + 1,
690  (table_vlc[code][0] << 1) + sign);
691  } else {
692  /* escape seems to be pretty rare <5% so I do not optimize it */
693  put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
694  /* escape: only clip in this case */
695  put_bits(&s->pb, 6, run);
696  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
697  if (alevel < 128) {
698  put_sbits(&s->pb, 8, level);
699  } else {
700  if (level < 0)
701  put_bits(&s->pb, 16, 0x8001 + level + 255);
702  else
703  put_sbits(&s->pb, 16, level);
704  }
705  } else {
706  put_sbits(&s->pb, 12, level);
707  }
708  }
709  last_non_zero = i;
710  }
711  }
712  /* end of block */
713  put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
714 }
715 
717  int16_t block[8][64],
718  int motion_x, int motion_y,
719  int mb_block_count)
720 {
721  int i, cbp;
722  const int mb_x = s->mb_x;
723  const int mb_y = s->mb_y;
724  const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
725 
726  /* compute cbp */
727  cbp = 0;
728  for (i = 0; i < mb_block_count; i++)
729  if (s->block_last_index[i] >= 0)
730  cbp |= 1 << (mb_block_count - 1 - i);
731 
732  if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
733  (mb_x != s->mb_width - 1 ||
734  (mb_y != s->end_mb_y - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
735  ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
736  (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
737  (((s->mv_dir & MV_DIR_FORWARD)
738  ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
739  (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
740  ((s->mv_dir & MV_DIR_BACKWARD)
741  ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
742  (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
743  s->mb_skip_run++;
744  s->qscale -= s->dquant;
745  s->skip_count++;
746  s->misc_bits++;
747  s->last_bits++;
748  if (s->pict_type == AV_PICTURE_TYPE_P) {
749  s->last_mv[0][0][0] =
750  s->last_mv[0][0][1] =
751  s->last_mv[0][1][0] =
752  s->last_mv[0][1][1] = 0;
753  }
754  } else {
755  if (first_mb) {
756  av_assert0(s->mb_skip_run == 0);
757  encode_mb_skip_run(s, s->mb_x);
758  } else {
760  }
761 
762  if (s->pict_type == AV_PICTURE_TYPE_I) {
763  if (s->dquant && cbp) {
764  /* macroblock_type: macroblock_quant = 1 */
765  put_mb_modes(s, 2, 1, 0, 0);
766  put_qscale(s);
767  } else {
768  /* macroblock_type: macroblock_quant = 0 */
769  put_mb_modes(s, 1, 1, 0, 0);
770  s->qscale -= s->dquant;
771  }
772  s->misc_bits += get_bits_diff(s);
773  s->i_count++;
774  } else if (s->mb_intra) {
775  if (s->dquant && cbp) {
776  put_mb_modes(s, 6, 0x01, 0, 0);
777  put_qscale(s);
778  } else {
779  put_mb_modes(s, 5, 0x03, 0, 0);
780  s->qscale -= s->dquant;
781  }
782  s->misc_bits += get_bits_diff(s);
783  s->i_count++;
784  memset(s->last_mv, 0, sizeof(s->last_mv));
785  } else if (s->pict_type == AV_PICTURE_TYPE_P) {
786  if (s->mv_type == MV_TYPE_16X16) {
787  if (cbp != 0) {
788  if ((motion_x | motion_y) == 0) {
789  if (s->dquant) {
790  /* macroblock_pattern & quant */
791  put_mb_modes(s, 5, 1, 0, 0);
792  put_qscale(s);
793  } else {
794  /* macroblock_pattern only */
795  put_mb_modes(s, 2, 1, 0, 0);
796  }
797  s->misc_bits += get_bits_diff(s);
798  } else {
799  if (s->dquant) {
800  put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
801  put_qscale(s);
802  } else {
803  put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
804  }
805  s->misc_bits += get_bits_diff(s);
806  // RAL: f_code parameter added
808  motion_x - s->last_mv[0][0][0],
809  s->f_code);
810  // RAL: f_code parameter added
812  motion_y - s->last_mv[0][0][1],
813  s->f_code);
814  s->mv_bits += get_bits_diff(s);
815  }
816  } else {
817  put_bits(&s->pb, 3, 1); /* motion only */
818  if (!s->frame_pred_frame_dct)
819  put_bits(&s->pb, 2, 2); /* motion_type: frame */
820  s->misc_bits += get_bits_diff(s);
821  // RAL: f_code parameter added
823  motion_x - s->last_mv[0][0][0],
824  s->f_code);
825  // RAL: f_code parameter added
827  motion_y - s->last_mv[0][0][1],
828  s->f_code);
829  s->qscale -= s->dquant;
830  s->mv_bits += get_bits_diff(s);
831  }
832  s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
833  s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
834  } else {
836 
837  if (cbp) {
838  if (s->dquant) {
839  put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
840  put_qscale(s);
841  } else {
842  put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
843  }
844  } else {
845  put_bits(&s->pb, 3, 1); /* motion only */
846  put_bits(&s->pb, 2, 1); /* motion_type: field */
847  s->qscale -= s->dquant;
848  }
849  s->misc_bits += get_bits_diff(s);
850  for (i = 0; i < 2; i++) {
851  put_bits(&s->pb, 1, s->field_select[0][i]);
853  s->mv[0][i][0] - s->last_mv[0][i][0],
854  s->f_code);
856  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
857  s->f_code);
858  s->last_mv[0][i][0] = s->mv[0][i][0];
859  s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
860  }
861  s->mv_bits += get_bits_diff(s);
862  }
863  if (cbp) {
864  if (s->chroma_y_shift) {
865  put_bits(&s->pb,
866  ff_mpeg12_mbPatTable[cbp][1],
867  ff_mpeg12_mbPatTable[cbp][0]);
868  } else {
869  put_bits(&s->pb,
870  ff_mpeg12_mbPatTable[cbp >> 2][1],
871  ff_mpeg12_mbPatTable[cbp >> 2][0]);
872  put_sbits(&s->pb, 2, cbp);
873  }
874  }
875  s->f_count++;
876  } else {
877  if (s->mv_type == MV_TYPE_16X16) {
878  if (cbp) { // With coded bloc pattern
879  if (s->dquant) {
880  if (s->mv_dir == MV_DIR_FORWARD)
881  put_mb_modes(s, 6, 3, 1, 0);
882  else
883  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
884  put_qscale(s);
885  } else {
886  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
887  }
888  } else { // No coded bloc pattern
889  put_bits(&s->pb, 5 - s->mv_dir, 2);
890  if (!s->frame_pred_frame_dct)
891  put_bits(&s->pb, 2, 2); /* motion_type: frame */
892  s->qscale -= s->dquant;
893  }
894  s->misc_bits += get_bits_diff(s);
895  if (s->mv_dir & MV_DIR_FORWARD) {
897  s->mv[0][0][0] - s->last_mv[0][0][0],
898  s->f_code);
900  s->mv[0][0][1] - s->last_mv[0][0][1],
901  s->f_code);
902  s->last_mv[0][0][0] =
903  s->last_mv[0][1][0] = s->mv[0][0][0];
904  s->last_mv[0][0][1] =
905  s->last_mv[0][1][1] = s->mv[0][0][1];
906  s->f_count++;
907  }
908  if (s->mv_dir & MV_DIR_BACKWARD) {
910  s->mv[1][0][0] - s->last_mv[1][0][0],
911  s->b_code);
913  s->mv[1][0][1] - s->last_mv[1][0][1],
914  s->b_code);
915  s->last_mv[1][0][0] =
916  s->last_mv[1][1][0] = s->mv[1][0][0];
917  s->last_mv[1][0][1] =
918  s->last_mv[1][1][1] = s->mv[1][0][1];
919  s->b_count++;
920  }
921  } else {
924  if (cbp) { // With coded bloc pattern
925  if (s->dquant) {
926  if (s->mv_dir == MV_DIR_FORWARD)
927  put_mb_modes(s, 6, 3, 1, 1);
928  else
929  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
930  put_qscale(s);
931  } else {
932  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
933  }
934  } else { // No coded bloc pattern
935  put_bits(&s->pb, 5 - s->mv_dir, 2);
936  put_bits(&s->pb, 2, 1); /* motion_type: field */
937  s->qscale -= s->dquant;
938  }
939  s->misc_bits += get_bits_diff(s);
940  if (s->mv_dir & MV_DIR_FORWARD) {
941  for (i = 0; i < 2; i++) {
942  put_bits(&s->pb, 1, s->field_select[0][i]);
944  s->mv[0][i][0] - s->last_mv[0][i][0],
945  s->f_code);
947  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
948  s->f_code);
949  s->last_mv[0][i][0] = s->mv[0][i][0];
950  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
951  }
952  s->f_count++;
953  }
954  if (s->mv_dir & MV_DIR_BACKWARD) {
955  for (i = 0; i < 2; i++) {
956  put_bits(&s->pb, 1, s->field_select[1][i]);
958  s->mv[1][i][0] - s->last_mv[1][i][0],
959  s->b_code);
961  s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
962  s->b_code);
963  s->last_mv[1][i][0] = s->mv[1][i][0];
964  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
965  }
966  s->b_count++;
967  }
968  }
969  s->mv_bits += get_bits_diff(s);
970  if (cbp) {
971  if (s->chroma_y_shift) {
972  put_bits(&s->pb,
973  ff_mpeg12_mbPatTable[cbp][1],
974  ff_mpeg12_mbPatTable[cbp][0]);
975  } else {
976  put_bits(&s->pb,
977  ff_mpeg12_mbPatTable[cbp >> 2][1],
978  ff_mpeg12_mbPatTable[cbp >> 2][0]);
979  put_sbits(&s->pb, 2, cbp);
980  }
981  }
982  }
983  for (i = 0; i < mb_block_count; i++)
984  if (cbp & (1 << (mb_block_count - 1 - i)))
985  mpeg1_encode_block(s, block[i], i);
986  s->mb_skip_run = 0;
987  if (s->mb_intra)
988  s->i_tex_bits += get_bits_diff(s);
989  else
990  s->p_tex_bits += get_bits_diff(s);
991  }
992 }
993 
994 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
995  int motion_x, int motion_y)
996 {
997  if (s->chroma_format == CHROMA_420)
998  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
999  else
1000  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
1001 }
1002 
1004 {
1005  static int done = 0;
1006 
1008 
1009  if (!done) {
1010  int f_code;
1011  int mv;
1012  int i;
1013 
1014  done = 1;
1017 
1018  for (i = 0; i < 64; i++) {
1019  mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
1020  mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
1021  }
1022 
1024  if (s->intra_vlc_format)
1026 
1027  /* build unified dc encoding tables */
1028  for (i = -255; i < 256; i++) {
1029  int adiff, index;
1030  int bits, code;
1031  int diff = i;
1032 
1033  adiff = FFABS(diff);
1034  if (diff < 0)
1035  diff--;
1036  index = av_log2(2 * adiff);
1037 
1039  code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
1040  av_mod_uintp2(diff, index);
1041  mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1042 
1045  av_mod_uintp2(diff, index);
1046  mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1047  }
1048 
1049  for (f_code = 1; f_code <= MAX_FCODE; f_code++)
1050  for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1051  int len;
1052 
1053  if (mv == 0) {
1054  len = ff_mpeg12_mbMotionVectorTable[0][1];
1055  } else {
1056  int val, bit_size, code;
1057 
1058  bit_size = f_code - 1;
1059 
1060  val = mv;
1061  if (val < 0)
1062  val = -val;
1063  val--;
1064  code = (val >> bit_size) + 1;
1065  if (code < 17)
1066  len = ff_mpeg12_mbMotionVectorTable[code][1] +
1067  1 + bit_size;
1068  else
1069  len = ff_mpeg12_mbMotionVectorTable[16][1] +
1070  2 + bit_size;
1071  }
1072 
1073  mv_penalty[f_code][mv + MAX_DMV] = len;
1074  }
1075 
1076 
1077  for (f_code = MAX_FCODE; f_code > 0; f_code--)
1078  for (mv = -(8 << f_code); mv < (8 << f_code); mv++)
1079  fcode_tab[mv + MAX_MV] = f_code;
1080  }
1081  s->me.mv_penalty = mv_penalty;
1082  s->fcode_tab = fcode_tab;
1083  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1084  s->min_qcoeff = -255;
1085  s->max_qcoeff = 255;
1086  } else {
1087  s->min_qcoeff = -2047;
1088  s->max_qcoeff = 2047;
1089  }
1090  if (s->intra_vlc_format) {
1091  s->intra_ac_vlc_length =
1093  } else {
1094  s->intra_ac_vlc_length =
1096  }
1097  s->inter_ac_vlc_length =
1099 }
1100 
1101 #define OFFSET(x) offsetof(MpegEncContext, x)
1102 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1103 #define COMMON_OPTS \
1104  { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1105  OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
1106  { "intra_vlc", "Use MPEG-2 intra VLC table.", \
1107  OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1108  { "drop_frame_timecode", "Timecode is in drop frame format.", \
1109  OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1110  { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1111  OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1112  { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1113  OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1114 
1115 static const AVOption mpeg1_options[] = {
1116  COMMON_OPTS
1118  { NULL },
1119 };
1120 
1121 static const AVOption mpeg2_options[] = {
1122  COMMON_OPTS
1123  { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1124  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1125  { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
1126  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, "seq_disp_ext" },
1127  { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, "seq_disp_ext" },
1128  { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, "seq_disp_ext" },
1129  { "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" },
1130  { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, "video_format" },
1131  { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, "video_format" },
1132  { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, "video_format" },
1133  { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, "video_format" },
1134  { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, "video_format" },
1135  { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, "video_format" },
1137  { NULL },
1138 };
1139 
1140 #define mpeg12_class(x) \
1141 static const AVClass mpeg ## x ## _class = { \
1142  .class_name = "mpeg" # x "video encoder", \
1143  .item_name = av_default_item_name, \
1144  .option = mpeg ## x ## _options, \
1145  .version = LIBAVUTIL_VERSION_INT, \
1146 };
1147 
1149 mpeg12_class(2)
1150 
1152  .name = "mpeg1video",
1153  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
1154  .type = AVMEDIA_TYPE_VIDEO,
1155  .id = AV_CODEC_ID_MPEG1VIDEO,
1156  .priv_data_size = sizeof(MpegEncContext),
1157  .init = encode_init,
1158  .encode2 = ff_mpv_encode_picture,
1159  .close = ff_mpv_encode_end,
1160  .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1161  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1162  AV_PIX_FMT_NONE },
1164  .priv_class = &mpeg1_class,
1165 };
1166 
1168  .name = "mpeg2video",
1169  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
1170  .type = AVMEDIA_TYPE_VIDEO,
1171  .id = AV_CODEC_ID_MPEG2VIDEO,
1172  .priv_data_size = sizeof(MpegEncContext),
1173  .init = encode_init,
1174  .encode2 = ff_mpv_encode_picture,
1175  .close = ff_mpv_encode_end,
1176  .supported_framerates = ff_mpeg2_frame_rate_tab,
1177  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1179  AV_PIX_FMT_NONE },
1181  .priv_class = &mpeg2_class,
1182 };
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: avcodec.h:2583
av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
Definition: mpeg12enc.c:1003
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:1167
const char const char void * val
Definition: avisynth_c.h:771
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: mpegvideo.h:462
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:99
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 VIDEO_FORMAT_COMPONENT
Definition: mpegvideo.h:473
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:1086
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:611
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
int av_log2(unsigned v)
Definition: intmath.c:26
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:1898
int scan_offset
reserve space for SVCD scan offset user data.
Definition: mpegvideo.h:493
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:2845
int av_log2_16bit(unsigned v)
Definition: intmath.c:31
AVCodec.
Definition: avcodec.h:3410
#define MAX_FCODE
Definition: mpegutils.h:48
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:1642
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:732
static int16_t block[64]
Definition: dct.c:115
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:2956
#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:986
#define VIDEO_FORMAT_NTSC
Definition: mpegvideo.h:475
#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:474
#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:393
RLTable ff_rl_mpeg2
Definition: mpeg12data.c:174
Stereo 3D type: this structure describes how two videos are packed within a single video surface...
Definition: stereo3d.h:176
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
Definition: avcodec.h:1990
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:1115
static void mpeg1_encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: mpeg12enc.c:637
int interlaced_dct
Definition: mpegvideo.h:490
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:180
#define CHROMA_420
Definition: mpegvideo.h:482
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:52
#define VIDEO_FORMAT_UNSPECIFIED
Definition: mpegvideo.h:478
AVCodec ff_mpeg1video_encoder
int intra_dc_precision
Definition: mpegvideo.h:463
int repeat_first_field
Definition: mpegvideo.h:479
Structure to hold side data for an AVFrame.
Definition: frame.h:180
#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:476
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:2582
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:748
int intra_only
if true, only intra pictures are generated
Definition: mpegvideo.h:102
#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 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:551
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:316
int chroma_y_shift
Definition: mpegvideo.h:486
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
#define VIDEO_FORMAT_MAC
Definition: mpegvideo.h:477
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:603
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1600
uint8_t * buf
Definition: put_bits.h:38
uint16_t width
Definition: gdv.c:47
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:3417
int width
width and height in 1/16 pel
Definition: avcodec.h:1085
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:406
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:2477
static void mpeg1_encode_sequence_header(MpegEncContext *s)
Definition: mpeg12enc.c:238
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
Definition: mpeg12enc.c:564
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:2378
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:312
#define mpeg12_class(x)
Definition: mpeg12enc.c:1140
int intra_vlc_format
Definition: mpegvideo.h:469
int progressive_frame
Definition: mpegvideo.h:488
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
int width
picture width / height.
Definition: avcodec.h:1692
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:2846
RLTable ff_rl_mpeg1
Definition: mpeg12data.c:166
int alternate_scan
Definition: mpegvideo.h:470
#define GOP_START_CODE
Definition: mpegvideo.h:69
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2129
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:2955
#define VE
Definition: mpeg12enc.c:1102
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:684
#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:64
static void put_header(MpegEncContext *s, int header)
Definition: mpeg12enc.c:230
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)
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:1021
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:464
#define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE
timecode is in drop frame format.
Definition: avcodec.h:916
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:332
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:466
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:499
Timecode helpers header.
main external API structure.
Definition: avcodec.h:1520
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:716
uint8_t * data
Definition: frame.h:182
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
Definition: avcodec.h:2017
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:2143
Rational number (pair of numerator and denominator).
Definition: rational.h:58
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2136
struct AVFrame * f
Definition: mpegpicture.h:46
#define COMMON_OPTS
Definition: mpeg12enc.c:1103
uint8_t * index_run[2]
encoding only
Definition: rl.h:45
#define OFFSET(x)
Definition: mpeg12enc.c:1101
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: mpeg12enc.c:422
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
Definition: avcodec.h:2024
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:266
av_cold void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:107
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:994
Pan Scan area.
Definition: avcodec.h:1072
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:138
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:403
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
if(ret< 0)
Definition: vf_mcdeint.c:279
static uint32_t mpeg1_chr_dc_uni[512]
Definition: mpeg12enc.c:59
static const AVOption mpeg2_options[]
Definition: mpeg12enc.c:1121
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:1547
void ff_mpeg1_encode_slice_header(MpegEncContext *s)
Definition: mpeg12enc.c:408
#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:460
#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:370
int len
#define SEQ_START_CODE
Definition: mpegvideo.h:68
int drop_frame_timecode
timecode is in drop frame format.
Definition: mpegvideo.h:492
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:296
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1607
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
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:898
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:500
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:2578
Predicted.
Definition: avutil.h:275
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2393
const AVRational ff_mpeg12_frame_rate_tab[]