FFmpeg
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 "config.h"
31 #include "config_components.h"
32 #include "libavutil/attributes.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/log.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/thread.h"
37 #include "libavutil/timecode.h"
38 #include "libavutil/stereo3d.h"
39 
40 #include "avcodec.h"
41 #include "codec_internal.h"
42 #include "mathops.h"
43 #include "mpeg12.h"
44 #include "mpeg12data.h"
45 #include "mpeg12enc.h"
46 #include "mpeg12vlc.h"
47 #include "mpegutils.h"
48 #include "mpegvideo.h"
49 #include "mpegvideodata.h"
50 #include "mpegvideoenc.h"
51 #include "profiles.h"
52 #include "rl.h"
53 
54 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
55 static const uint8_t svcd_scan_offset_placeholder[] = {
56  0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
57  0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
58 };
59 
60 static uint8_t mv_penalty[MAX_FCODE + 1][MAX_DMV * 2 + 1];
61 static uint8_t fcode_tab[MAX_MV * 2 + 1];
62 
63 static uint8_t uni_mpeg1_ac_vlc_len[64 * 64 * 2];
64 static uint8_t uni_mpeg2_ac_vlc_len[64 * 64 * 2];
65 
66 static uint8_t mpeg12_max_level[MAX_LEVEL + 1];
67 static uint8_t mpeg12_index_run[MAX_RUN + 1];
68 
69 /* simple include everything table for dc, first byte is bits
70  * number next 3 are code */
71 static uint32_t mpeg1_lum_dc_uni[512];
72 static uint32_t mpeg1_chr_dc_uni[512];
73 
74 typedef struct MPEG12EncContext {
75  MpegEncContext mpeg;
76  AVRational frame_rate_ext;
77  unsigned frame_rate_index;
78 
79  int gop_picture_number; ///< index of the first picture of a GOP based on fake_pic_num
80 
81  int64_t timecode_frame_start; ///< GOP timecode frame start number, in non drop frame format
82  AVTimecode tc; ///< timecode context
83  char *tc_opt_str; ///< timecode option string
84  int drop_frame_timecode; ///< timecode is in drop frame format.
85  int scan_offset; ///< reserve space for SVCD scan offset user data.
86 
87  int a53_cc;
88  int seq_disp_ext;
89  int video_format;
90 #define VIDEO_FORMAT_COMPONENT 0
91 #define VIDEO_FORMAT_PAL 1
92 #define VIDEO_FORMAT_NTSC 2
93 #define VIDEO_FORMAT_SECAM 3
94 #define VIDEO_FORMAT_MAC 4
95 #define VIDEO_FORMAT_UNSPECIFIED 5
96 } MPEG12EncContext;
97 
98 #define A53_MAX_CC_COUNT 0x1f
99 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
100 
101 av_cold void ff_mpeg1_init_uni_ac_vlc(const int8_t max_level[],
102  const uint8_t index_run[],
103  const uint16_t table_vlc[][2],
104  uint8_t uni_ac_vlc_len[])
105 {
106  int i;
107 
108  for (i = 0; i < 128; i++) {
109  int level = i - 64;
110  int run;
111  if (!level)
112  continue;
113  for (run = 0; run < 64; run++) {
114  int len, code;
115  int alevel = FFABS(level);
116 
117  if (alevel > max_level[run])
118  code = 111; /* rl->n */
119  else
120  code = index_run[run] + alevel - 1;
121 
122  if (code < 111) { /* rl->n */
123  /* length of VLC and sign */
124  len = table_vlc[code][1] + 1;
125  } else {
126  len = table_vlc[MPEG12_RL_NB_ELEMS][1] + 6;
127 
128  if (alevel < 128)
129  len += 8;
130  else
131  len += 16;
132  }
133 
134  uni_ac_vlc_len[UNI_AC_ENC_INDEX(run, i)] = len;
135  }
136  }
137 }
138 
139 #if CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER
140 static int find_frame_rate_index(AVCodecContext *avctx, MPEG12EncContext *mpeg12)
141 {
142  int i;
143  AVRational bestq = (AVRational) {0, 0};
144  AVRational ext;
145  AVRational target = av_inv_q(avctx->time_base);
146 
147  for (i = 1; i < 14; i++) {
149  i >= 9)
150  break;
151 
152  for (ext.num=1; ext.num <= 4; ext.num++) {
153  for (ext.den=1; ext.den <= 32; ext.den++) {
155 
156  if (avctx->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
157  continue;
158  if (av_gcd(ext.den, ext.num) != 1)
159  continue;
160 
161  if ( bestq.num==0
162  || av_nearer_q(target, bestq, q) < 0
163  || ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0) {
164  bestq = q;
165  mpeg12->frame_rate_index = i;
166  mpeg12->frame_rate_ext.num = ext.num;
167  mpeg12->frame_rate_ext.den = ext.den;
168  }
169  }
170  }
171  }
172 
173  if (av_cmp_q(target, bestq))
174  return -1;
175  else
176  return 0;
177 }
178 
179 static av_cold int encode_init(AVCodecContext *avctx)
180 {
181  MPEG12EncContext *const mpeg12 = avctx->priv_data;
182  int ret;
183  int max_size = avctx->codec_id == AV_CODEC_ID_MPEG2VIDEO ? 16383 : 4095;
184 
185  if (avctx->width > max_size || avctx->height > max_size) {
186  av_log(avctx, AV_LOG_ERROR, "%s does not support resolutions above %dx%d\n",
187  CONFIG_SMALL ? avctx->codec->name : avctx->codec->long_name,
188  max_size, max_size);
189  return AVERROR(EINVAL);
190  }
191  if ((avctx->width & 0xFFF) == 0 && (avctx->height & 0xFFF) == 1) {
192  av_log(avctx, AV_LOG_ERROR, "Width / Height is invalid for MPEG2\n");
193  return AVERROR(EINVAL);
194  }
195 
197  if ((avctx->width & 0xFFF) == 0 || (avctx->height & 0xFFF) == 0) {
198  av_log(avctx, AV_LOG_ERROR, "Width or Height are not allowed to be multiples of 4096\n"
199  "add '-strict %d' if you want to use them anyway.\n", FF_COMPLIANCE_UNOFFICIAL);
200  return AVERROR(EINVAL);
201  }
202  }
203 
204  if (avctx->profile == AV_PROFILE_UNKNOWN) {
205  if (avctx->level != AV_LEVEL_UNKNOWN) {
206  av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
207  return AVERROR(EINVAL);
208  }
209  /* Main or 4:2:2 */
212  }
213  if (avctx->level == AV_LEVEL_UNKNOWN) {
214  if (avctx->profile == AV_PROFILE_MPEG2_422) { /* 4:2:2 */
215  if (avctx->width <= 720 && avctx->height <= 608)
216  avctx->level = 5; /* Main */
217  else
218  avctx->level = 2; /* High */
219  } else {
220  if (avctx->profile != AV_PROFILE_MPEG2_HIGH &&
221  avctx->pix_fmt != AV_PIX_FMT_YUV420P) {
222  av_log(avctx, AV_LOG_ERROR,
223  "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
224  return AVERROR(EINVAL);
225  }
226  if (avctx->width <= 720 && avctx->height <= 576)
227  avctx->level = 8; /* Main */
228  else if (avctx->width <= 1440)
229  avctx->level = 6; /* High 1440 */
230  else
231  avctx->level = 4; /* High */
232  }
233  }
234 
235  if ((ret = ff_mpv_encode_init(avctx)) < 0)
236  return ret;
237 
238  if (find_frame_rate_index(avctx, mpeg12) < 0) {
240  av_log(avctx, AV_LOG_ERROR, "MPEG-1/2 does not support %d/%d fps\n",
241  avctx->time_base.den, avctx->time_base.num);
242  return AVERROR(EINVAL);
243  } else {
244  av_log(avctx, AV_LOG_INFO,
245  "MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
246  avctx->time_base.den, avctx->time_base.num);
247  }
248  }
249 
250  if (mpeg12->drop_frame_timecode)
251  mpeg12->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
252  if (mpeg12->drop_frame_timecode && mpeg12->frame_rate_index != 4) {
253  av_log(avctx, AV_LOG_ERROR,
254  "Drop frame time code only allowed with 1001/30000 fps\n");
255  return AVERROR(EINVAL);
256  }
257 
258  if (mpeg12->tc_opt_str) {
259  AVRational rate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
260  int ret = av_timecode_init_from_string(&mpeg12->tc, rate, mpeg12->tc_opt_str, avctx);
261  if (ret < 0)
262  return ret;
263  mpeg12->drop_frame_timecode = !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
264  mpeg12->timecode_frame_start = mpeg12->tc.start;
265  } else {
266  mpeg12->timecode_frame_start = 0; // default is -1
267  }
268 
269  return 0;
270 }
271 
272 static void put_header(MpegEncContext *s, uint32_t header)
273 {
274  align_put_bits(&s->pb);
275  put_bits32(&s->pb, header);
276 }
277 
278 /* put sequence header if needed */
279 static void mpeg1_encode_sequence_header(MpegEncContext *s)
280 {
281  MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
282  unsigned int vbv_buffer_size, fps, v;
283  int constraint_parameter_flag;
284  AVRational framerate = ff_mpeg12_frame_rate_tab[mpeg12->frame_rate_index];
285  uint64_t time_code;
286  int64_t best_aspect_error = INT64_MAX;
287  AVRational aspect_ratio = s->avctx->sample_aspect_ratio;
288  int aspect_ratio_info;
289 
290  if (!(s->cur_pic.ptr->f->flags & AV_FRAME_FLAG_KEY))
291  return;
292 
293  if (aspect_ratio.num == 0 || aspect_ratio.den == 0)
294  aspect_ratio = (AVRational){1,1}; // pixel aspect 1.1 (VGA)
295 
296  /* MPEG-1 header repeated every GOP */
298 
299  put_sbits(&s->pb, 12, s->width & 0xFFF);
300  put_sbits(&s->pb, 12, s->height & 0xFFF);
301 
302  for (int i = 1; i < 15; i++) {
303  int64_t error = aspect_ratio.num * (1LL<<32) / aspect_ratio.den;
304  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <= 1)
305  error -= (1LL<<32) / ff_mpeg1_aspect[i];
306  else
307  error -= (1LL<<32)*ff_mpeg2_aspect[i].num * s->height / s->width / ff_mpeg2_aspect[i].den;
308 
309  error = FFABS(error);
310 
311  if (error - 2 <= best_aspect_error) {
312  best_aspect_error = error;
313  aspect_ratio_info = i;
314  }
315  }
316 
317  put_bits(&s->pb, 4, aspect_ratio_info);
318  put_bits(&s->pb, 4, mpeg12->frame_rate_index);
319 
320  if (s->avctx->rc_max_rate) {
321  v = (s->avctx->rc_max_rate + 399) / 400;
322  if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
323  v = 0x3ffff;
324  } else {
325  v = 0x3FFFF;
326  }
327 
328  if (s->avctx->rc_buffer_size)
329  vbv_buffer_size = s->avctx->rc_buffer_size;
330  else
331  /* VBV calculation: Scaled so that a VCD has the proper
332  * VBV size of 40 kilobytes */
333  vbv_buffer_size = av_rescale_rnd(s->bit_rate, 20, 1151929 / 2, AV_ROUND_ZERO) * 8 * 1024;
334  vbv_buffer_size = (vbv_buffer_size + 16383) / 16384;
335 
336  put_sbits(&s->pb, 18, v);
337  put_bits(&s->pb, 1, 1); // marker
338  put_sbits(&s->pb, 10, vbv_buffer_size);
339 
340  constraint_parameter_flag =
341  s->width <= 768 &&
342  s->height <= 576 &&
343  s->mb_width * s->mb_height <= 396 &&
344  s->mb_width * s->mb_height * framerate.num <= 396 * 25 * framerate.den &&
345  framerate.num <= framerate.den * 30 &&
346  s->avctx->me_range &&
347  s->avctx->me_range < 128 &&
348  vbv_buffer_size <= 20 &&
349  v <= 1856000 / 400 &&
350  s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
351 
352  put_bits(&s->pb, 1, constraint_parameter_flag);
353 
354  ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
355  ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
356 
357  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
358  const AVFrameSideData *side_data;
359  int width = s->width;
360  int height = s->height;
361  int use_seq_disp_ext;
362 
364  put_bits(&s->pb, 4, 1); // seq ext
365 
366  put_bits(&s->pb, 1, s->avctx->profile == AV_PROFILE_MPEG2_422); // escx 1 for 4:2:2 profile
367 
368  put_bits(&s->pb, 3, s->avctx->profile); // profile
369  put_bits(&s->pb, 4, s->avctx->level); // level
370 
371  put_bits(&s->pb, 1, s->progressive_sequence);
372  put_bits(&s->pb, 2, s->chroma_format);
373  put_bits(&s->pb, 2, s->width >> 12);
374  put_bits(&s->pb, 2, s->height >> 12);
375  put_bits(&s->pb, 12, v >> 18); // bitrate ext
376  put_bits(&s->pb, 1, 1); // marker
377  put_bits(&s->pb, 8, vbv_buffer_size >> 10); // vbv buffer ext
378  put_bits(&s->pb, 1, s->low_delay);
379  put_bits(&s->pb, 2, mpeg12->frame_rate_ext.num-1); // frame_rate_ext_n
380  put_bits(&s->pb, 5, mpeg12->frame_rate_ext.den-1); // frame_rate_ext_d
381 
382  side_data = av_frame_get_side_data(s->cur_pic.ptr->f, AV_FRAME_DATA_PANSCAN);
383  if (side_data) {
384  const AVPanScan *pan_scan = (AVPanScan *)side_data->data;
385  if (pan_scan->width && pan_scan->height) {
386  width = pan_scan->width >> 4;
387  height = pan_scan->height >> 4;
388  }
389  }
390 
391  use_seq_disp_ext = (width != s->width ||
392  height != s->height ||
393  s->avctx->color_primaries != AVCOL_PRI_UNSPECIFIED ||
394  s->avctx->color_trc != AVCOL_TRC_UNSPECIFIED ||
395  s->avctx->colorspace != AVCOL_SPC_UNSPECIFIED ||
396  mpeg12->video_format != VIDEO_FORMAT_UNSPECIFIED);
397 
398  if (mpeg12->seq_disp_ext == 1 ||
399  (mpeg12->seq_disp_ext == -1 && use_seq_disp_ext)) {
401  put_bits(&s->pb, 4, 2); // sequence display extension
402  put_bits(&s->pb, 3, mpeg12->video_format); // video_format
403  put_bits(&s->pb, 1, 1); // colour_description
404  put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
405  put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
406  put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
407  put_bits(&s->pb, 14, width); // display_horizontal_size
408  put_bits(&s->pb, 1, 1); // marker_bit
409  put_bits(&s->pb, 14, height); // display_vertical_size
410  put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
411  }
412  }
413 
415  put_bits(&s->pb, 1, mpeg12->drop_frame_timecode); // drop frame flag
416  /* time code: we must convert from the real frame rate to a
417  * fake MPEG frame rate in case of low frame rate */
418  fps = (framerate.num + framerate.den / 2) / framerate.den;
419  time_code = s->cur_pic.ptr->coded_picture_number +
420  mpeg12->timecode_frame_start;
421 
422  mpeg12->gop_picture_number = s->cur_pic.ptr->coded_picture_number;
423 
424  av_assert0(mpeg12->drop_frame_timecode == !!(mpeg12->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
425  if (mpeg12->drop_frame_timecode)
426  time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
427 
428  put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
429  put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
430  put_bits(&s->pb, 1, 1);
431  put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
432  put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
433  put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) ||
434  s->intra_only || !mpeg12->gop_picture_number);
435  put_bits(&s->pb, 1, 0); // broken link
436 }
437 
438 static inline void encode_mb_skip_run(MpegEncContext *s, int run)
439 {
440  while (run >= 33) {
441  put_bits(&s->pb, 11, 0x008);
442  run -= 33;
443  }
446 }
447 
448 static av_always_inline void put_qscale(MpegEncContext *s)
449 {
450  put_bits(&s->pb, 5, s->qscale);
451 }
452 
454 {
455  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
456  put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
457  /* slice_vertical_position_extension */
458  put_bits(&s->pb, 3, s->mb_y >> 7);
459  } else {
461  }
462  put_qscale(s);
463  /* slice extra information */
464  put_bits(&s->pb, 1, 0);
465 }
466 
468 {
469  MPEG12EncContext *const mpeg12 = (MPEG12EncContext*)s;
470  const AVFrameSideData *side_data;
471  mpeg1_encode_sequence_header(s);
472 
473  /* MPEG-1 picture header */
475  /* temporal reference */
476 
477  // RAL: s->picture_number instead of s->fake_picture_number
478  put_bits(&s->pb, 10,
479  (s->picture_number - mpeg12->gop_picture_number) & 0x3ff);
480  put_bits(&s->pb, 3, s->pict_type);
481 
482  s->vbv_delay_pos = put_bytes_count(&s->pb, 0);
483  put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
484 
485  // RAL: Forward f_code also needed for B-frames
486  if (s->pict_type == AV_PICTURE_TYPE_P ||
487  s->pict_type == AV_PICTURE_TYPE_B) {
488  put_bits(&s->pb, 1, 0); /* half pel coordinates */
489  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
490  put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
491  else
492  put_bits(&s->pb, 3, 7); /* forward_f_code */
493  }
494 
495  // RAL: Backward f_code necessary for B-frames
496  if (s->pict_type == AV_PICTURE_TYPE_B) {
497  put_bits(&s->pb, 1, 0); /* half pel coordinates */
498  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
499  put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
500  else
501  put_bits(&s->pb, 3, 7); /* backward_f_code */
502  }
503 
504  put_bits(&s->pb, 1, 0); /* extra bit picture */
505 
506  s->frame_pred_frame_dct = 1;
507  if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
509  put_bits(&s->pb, 4, 8); /* pic ext */
510  if (s->pict_type == AV_PICTURE_TYPE_P ||
511  s->pict_type == AV_PICTURE_TYPE_B) {
512  put_bits(&s->pb, 4, s->f_code);
513  put_bits(&s->pb, 4, s->f_code);
514  } else {
515  put_bits(&s->pb, 8, 255);
516  }
517  if (s->pict_type == AV_PICTURE_TYPE_B) {
518  put_bits(&s->pb, 4, s->b_code);
519  put_bits(&s->pb, 4, s->b_code);
520  } else {
521  put_bits(&s->pb, 8, 255);
522  }
523  put_bits(&s->pb, 2, s->intra_dc_precision);
524 
525  av_assert0(s->picture_structure == PICT_FRAME);
526  put_bits(&s->pb, 2, s->picture_structure);
527  if (s->progressive_sequence)
528  put_bits(&s->pb, 1, 0); /* no repeat */
529  else
530  put_bits(&s->pb, 1, !!(s->cur_pic.ptr->f->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST));
531  /* XXX: optimize the generation of this flag with entropy measures */
532  s->frame_pred_frame_dct = s->progressive_sequence;
533 
534  put_bits(&s->pb, 1, s->frame_pred_frame_dct);
535  put_bits(&s->pb, 1, s->concealment_motion_vectors);
536  put_bits(&s->pb, 1, s->q_scale_type);
537  put_bits(&s->pb, 1, s->intra_vlc_format);
538  put_bits(&s->pb, 1, s->alternate_scan);
539  put_bits(&s->pb, 1, s->repeat_first_field);
540  s->progressive_frame = s->progressive_sequence;
541  /* chroma_420_type */
542  put_bits(&s->pb, 1, s->chroma_format ==
543  CHROMA_420 ? s->progressive_frame : 0);
544  put_bits(&s->pb, 1, s->progressive_frame);
545  put_bits(&s->pb, 1, 0); /* composite_display_flag */
546  }
547  if (mpeg12->scan_offset) {
548  int i;
549 
551  for (i = 0; i < sizeof(svcd_scan_offset_placeholder); i++)
552  put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
553  }
554  side_data = av_frame_get_side_data(s->cur_pic.ptr->f,
556  if (side_data) {
557  const AVStereo3D *stereo = (AVStereo3D *)side_data->data;
558  uint8_t fpa_type;
559 
560  switch (stereo->type) {
562  fpa_type = 0x03;
563  break;
565  fpa_type = 0x04;
566  break;
567  case AV_STEREO3D_2D:
568  fpa_type = 0x08;
569  break;
571  fpa_type = 0x23;
572  break;
573  default:
574  fpa_type = 0;
575  break;
576  }
577 
578  if (fpa_type != 0) {
580  put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
581  put_bits(&s->pb, 8, 'P');
582  put_bits(&s->pb, 8, '3');
583  put_bits(&s->pb, 8, 'D');
584  put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
585 
586  put_bits(&s->pb, 1, 1); // reserved_bit
587  put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
588  put_bits(&s->pb, 8, 0x04); // reserved_data[0]
589  put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
590  }
591  }
592 
593  if (CONFIG_MPEG2VIDEO_ENCODER && mpeg12->a53_cc) {
594  side_data = av_frame_get_side_data(s->cur_pic.ptr->f,
596  if (side_data) {
597  if (side_data->size <= A53_MAX_CC_COUNT * 3 && side_data->size % 3 == 0) {
598  int i = 0;
599 
601 
602  put_bits(&s->pb, 8, 'G'); // user_identifier
603  put_bits(&s->pb, 8, 'A');
604  put_bits(&s->pb, 8, '9');
605  put_bits(&s->pb, 8, '4');
606  put_bits(&s->pb, 8, 3); // user_data_type_code
607  put_bits(&s->pb, 8,
608  (side_data->size / 3 & A53_MAX_CC_COUNT) | 0x40); // flags, cc_count
609  put_bits(&s->pb, 8, 0xff); // em_data
610 
611  for (i = 0; i < side_data->size; i++)
612  put_bits(&s->pb, 8, side_data->data[i]);
613 
614  put_bits(&s->pb, 8, 0xff); // marker_bits
615  } else {
616  av_log(s->avctx, AV_LOG_WARNING,
617  "Closed Caption size (%"SIZE_SPECIFIER") can not exceed "
618  "93 bytes and must be a multiple of 3\n", side_data->size);
619  }
620  }
621  }
622 
623  s->mb_y = 0;
625 }
626 
627 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
628  int has_mv, int field_motion)
629 {
630  put_bits(&s->pb, n, bits);
631  if (!s->frame_pred_frame_dct) {
632  if (has_mv)
633  /* motion_type: frame/field */
634  put_bits(&s->pb, 2, 2 - field_motion);
635  put_bits(&s->pb, 1, s->interlaced_dct);
636  }
637 }
638 
639 // RAL: Parameter added: f_or_b_code
640 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
641 {
642  if (val == 0) {
643  /* zero vector, corresponds to ff_mpeg12_mbMotionVectorTable[0] */
644  put_bits(&s->pb, 1, 0x01);
645  } else {
646  int code, sign, bits;
647  int bit_size = f_or_b_code - 1;
648  int range = 1 << bit_size;
649  /* modulo encoding */
650  val = sign_extend(val, 5 + bit_size);
651 
652  if (val >= 0) {
653  val--;
654  code = (val >> bit_size) + 1;
655  bits = val & (range - 1);
656  sign = 0;
657  } else {
658  val = -val;
659  val--;
660  code = (val >> bit_size) + 1;
661  bits = val & (range - 1);
662  sign = 1;
663  }
664 
665  av_assert2(code > 0 && code <= 16);
666 
667  put_bits(&s->pb,
670 
671  put_bits(&s->pb, 1, sign);
672  if (bit_size > 0)
673  put_bits(&s->pb, bit_size, bits);
674  }
675 }
676 
677 static inline void encode_dc(MpegEncContext *s, int diff, int component)
678 {
679  unsigned int diff_u = diff + 255;
680  if (diff_u >= 511) {
681  int index;
682 
683  if (diff < 0) {
684  index = av_log2_16bit(-2 * diff);
685  diff--;
686  } else {
687  index = av_log2_16bit(2 * diff);
688  }
689  if (component == 0)
690  put_bits(&s->pb,
694  else
695  put_bits(&s->pb,
699  } else {
700  if (component == 0)
701  put_bits(&s->pb,
702  mpeg1_lum_dc_uni[diff + 255] & 0xFF,
703  mpeg1_lum_dc_uni[diff + 255] >> 8);
704  else
705  put_bits(&s->pb,
706  mpeg1_chr_dc_uni[diff + 255] & 0xFF,
707  mpeg1_chr_dc_uni[diff + 255] >> 8);
708  }
709 }
710 
711 static void mpeg1_encode_block(MpegEncContext *s, const int16_t *block, int n)
712 {
713  int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
714  int code, component;
715  const uint16_t (*table_vlc)[2] = ff_mpeg1_vlc_table;
716 
717  last_index = s->block_last_index[n];
718 
719  /* DC coef */
720  if (s->mb_intra) {
721  component = (n <= 3 ? 0 : (n & 1) + 1);
722  dc = block[0]; /* overflow is impossible */
723  diff = dc - s->last_dc[component];
724  encode_dc(s, diff, component);
725  s->last_dc[component] = dc;
726  i = 1;
727  if (s->intra_vlc_format)
728  table_vlc = ff_mpeg2_vlc_table;
729  } else {
730  /* encode the first coefficient: needs to be done here because
731  * it is handled slightly differently */
732  level = block[0];
733  if (abs(level) == 1) {
734  code = ((uint32_t)level >> 31); /* the sign bit */
735  put_bits(&s->pb, 2, code | 0x02);
736  i = 1;
737  } else {
738  i = 0;
739  last_non_zero = -1;
740  goto next_coef;
741  }
742  }
743 
744  /* now quantify & encode AC coefs */
745  last_non_zero = i - 1;
746 
747  for (; i <= last_index; i++) {
748  j = s->intra_scantable.permutated[i];
749  level = block[j];
750 
751 next_coef:
752  /* encode using VLC */
753  if (level != 0) {
754  run = i - last_non_zero - 1;
755 
756  alevel = level;
757  MASK_ABS(sign, alevel);
758  sign &= 1;
759 
760  if (alevel <= mpeg12_max_level[run]) {
761  code = mpeg12_index_run[run] + alevel - 1;
762  /* store the VLC & sign at once */
763  put_bits(&s->pb, table_vlc[code][1] + 1,
764  (table_vlc[code][0] << 1) + sign);
765  } else {
766  /* Escape seems to be pretty rare <5% so I do not optimize it;
767  * the following value is the common escape value for both
768  * possible tables (i.e. table_vlc[111]). */
769  put_bits(&s->pb, 6, 0x01);
770  /* escape: only clip in this case */
771  put_bits(&s->pb, 6, run);
772  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
773  if (alevel < 128) {
774  put_sbits(&s->pb, 8, level);
775  } else {
776  if (level < 0)
777  put_bits(&s->pb, 16, 0x8001 + level + 255);
778  else
779  put_sbits(&s->pb, 16, level);
780  }
781  } else {
782  put_sbits(&s->pb, 12, level);
783  }
784  }
785  last_non_zero = i;
786  }
787  }
788  /* end of block */
789  put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
790 }
791 
792 static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
793  const int16_t block[8][64],
794  int motion_x, int motion_y,
795  int mb_block_count,
796  int chroma_y_shift)
797 {
798 /* MPEG-1 is always 420. */
799 #define IS_MPEG1(s) (chroma_y_shift == 1 && (s)->codec_id == AV_CODEC_ID_MPEG1VIDEO)
800  int i, cbp;
801  const int mb_x = s->mb_x;
802  const int mb_y = s->mb_y;
803  const int first_mb = mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
804 
805  /* compute cbp */
806  cbp = 0;
807  for (i = 0; i < mb_block_count; i++)
808  if (s->block_last_index[i] >= 0)
809  cbp |= 1 << (mb_block_count - 1 - i);
810 
811  if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
812  (mb_x != s->mb_width - 1 ||
813  (mb_y != s->end_mb_y - 1 && IS_MPEG1(s))) &&
814  ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
815  (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir &&
816  (((s->mv_dir & MV_DIR_FORWARD)
817  ? ((s->mv[0][0][0] - s->last_mv[0][0][0]) |
818  (s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
819  ((s->mv_dir & MV_DIR_BACKWARD)
820  ? ((s->mv[1][0][0] - s->last_mv[1][0][0]) |
821  (s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
822  s->mb_skip_run++;
823  s->qscale -= s->dquant;
824  s->misc_bits++;
825  s->last_bits++;
826  if (s->pict_type == AV_PICTURE_TYPE_P) {
827  s->last_mv[0][0][0] =
828  s->last_mv[0][0][1] =
829  s->last_mv[0][1][0] =
830  s->last_mv[0][1][1] = 0;
831  }
832  } else {
833  if (first_mb) {
834  av_assert0(s->mb_skip_run == 0);
835  encode_mb_skip_run(s, s->mb_x);
836  } else {
837  encode_mb_skip_run(s, s->mb_skip_run);
838  }
839 
840  if (s->pict_type == AV_PICTURE_TYPE_I) {
841  if (s->dquant && cbp) {
842  /* macroblock_type: macroblock_quant = 1 */
843  put_mb_modes(s, 2, 1, 0, 0);
844  put_qscale(s);
845  } else {
846  /* macroblock_type: macroblock_quant = 0 */
847  put_mb_modes(s, 1, 1, 0, 0);
848  s->qscale -= s->dquant;
849  }
850  s->misc_bits += get_bits_diff(s);
851  s->i_count++;
852  } else if (s->mb_intra) {
853  if (s->dquant && cbp) {
854  put_mb_modes(s, 6, 0x01, 0, 0);
855  put_qscale(s);
856  } else {
857  put_mb_modes(s, 5, 0x03, 0, 0);
858  s->qscale -= s->dquant;
859  }
860  s->misc_bits += get_bits_diff(s);
861  s->i_count++;
862  memset(s->last_mv, 0, sizeof(s->last_mv));
863  } else if (s->pict_type == AV_PICTURE_TYPE_P) {
864  if (s->mv_type == MV_TYPE_16X16) {
865  if (cbp != 0) {
866  if ((motion_x | motion_y) == 0) {
867  if (s->dquant) {
868  /* macroblock_pattern & quant */
869  put_mb_modes(s, 5, 1, 0, 0);
870  put_qscale(s);
871  } else {
872  /* macroblock_pattern only */
873  put_mb_modes(s, 2, 1, 0, 0);
874  }
875  s->misc_bits += get_bits_diff(s);
876  } else {
877  if (s->dquant) {
878  put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
879  put_qscale(s);
880  } else {
881  put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
882  }
883  s->misc_bits += get_bits_diff(s);
884  // RAL: f_code parameter added
885  mpeg1_encode_motion(s,
886  motion_x - s->last_mv[0][0][0],
887  s->f_code);
888  // RAL: f_code parameter added
889  mpeg1_encode_motion(s,
890  motion_y - s->last_mv[0][0][1],
891  s->f_code);
892  s->mv_bits += get_bits_diff(s);
893  }
894  } else {
895  put_bits(&s->pb, 3, 1); /* motion only */
896  if (!s->frame_pred_frame_dct)
897  put_bits(&s->pb, 2, 2); /* motion_type: frame */
898  s->misc_bits += get_bits_diff(s);
899  // RAL: f_code parameter added
900  mpeg1_encode_motion(s,
901  motion_x - s->last_mv[0][0][0],
902  s->f_code);
903  // RAL: f_code parameter added
904  mpeg1_encode_motion(s,
905  motion_y - s->last_mv[0][0][1],
906  s->f_code);
907  s->qscale -= s->dquant;
908  s->mv_bits += get_bits_diff(s);
909  }
910  s->last_mv[0][1][0] = s->last_mv[0][0][0] = motion_x;
911  s->last_mv[0][1][1] = s->last_mv[0][0][1] = motion_y;
912  } else {
913  av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
914 
915  if (cbp) {
916  if (s->dquant) {
917  put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
918  put_qscale(s);
919  } else {
920  put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
921  }
922  } else {
923  put_bits(&s->pb, 3, 1); /* motion only */
924  put_bits(&s->pb, 2, 1); /* motion_type: field */
925  s->qscale -= s->dquant;
926  }
927  s->misc_bits += get_bits_diff(s);
928  for (i = 0; i < 2; i++) {
929  put_bits(&s->pb, 1, s->field_select[0][i]);
930  mpeg1_encode_motion(s,
931  s->mv[0][i][0] - s->last_mv[0][i][0],
932  s->f_code);
933  mpeg1_encode_motion(s,
934  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
935  s->f_code);
936  s->last_mv[0][i][0] = s->mv[0][i][0];
937  s->last_mv[0][i][1] = 2 * s->mv[0][i][1];
938  }
939  s->mv_bits += get_bits_diff(s);
940  }
941  if (cbp) {
942  if (chroma_y_shift) {
943  put_bits(&s->pb,
944  ff_mpeg12_mbPatTable[cbp][1],
945  ff_mpeg12_mbPatTable[cbp][0]);
946  } else {
947  put_bits(&s->pb,
948  ff_mpeg12_mbPatTable[cbp >> 2][1],
949  ff_mpeg12_mbPatTable[cbp >> 2][0]);
950  put_sbits(&s->pb, 2, cbp);
951  }
952  }
953  } else {
954  if (s->mv_type == MV_TYPE_16X16) {
955  if (cbp) { // With coded bloc pattern
956  if (s->dquant) {
957  if (s->mv_dir == MV_DIR_FORWARD)
958  put_mb_modes(s, 6, 3, 1, 0);
959  else
960  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 0);
961  put_qscale(s);
962  } else {
963  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 0);
964  }
965  } else { // No coded bloc pattern
966  put_bits(&s->pb, 5 - s->mv_dir, 2);
967  if (!s->frame_pred_frame_dct)
968  put_bits(&s->pb, 2, 2); /* motion_type: frame */
969  s->qscale -= s->dquant;
970  }
971  s->misc_bits += get_bits_diff(s);
972  if (s->mv_dir & MV_DIR_FORWARD) {
973  mpeg1_encode_motion(s,
974  s->mv[0][0][0] - s->last_mv[0][0][0],
975  s->f_code);
976  mpeg1_encode_motion(s,
977  s->mv[0][0][1] - s->last_mv[0][0][1],
978  s->f_code);
979  s->last_mv[0][0][0] =
980  s->last_mv[0][1][0] = s->mv[0][0][0];
981  s->last_mv[0][0][1] =
982  s->last_mv[0][1][1] = s->mv[0][0][1];
983  }
984  if (s->mv_dir & MV_DIR_BACKWARD) {
985  mpeg1_encode_motion(s,
986  s->mv[1][0][0] - s->last_mv[1][0][0],
987  s->b_code);
988  mpeg1_encode_motion(s,
989  s->mv[1][0][1] - s->last_mv[1][0][1],
990  s->b_code);
991  s->last_mv[1][0][0] =
992  s->last_mv[1][1][0] = s->mv[1][0][0];
993  s->last_mv[1][0][1] =
994  s->last_mv[1][1][1] = s->mv[1][0][1];
995  }
996  } else {
997  av_assert2(s->mv_type == MV_TYPE_FIELD);
998  av_assert2(!s->frame_pred_frame_dct);
999  if (cbp) { // With coded bloc pattern
1000  if (s->dquant) {
1001  if (s->mv_dir == MV_DIR_FORWARD)
1002  put_mb_modes(s, 6, 3, 1, 1);
1003  else
1004  put_mb_modes(s, 8 - s->mv_dir, 2, 1, 1);
1005  put_qscale(s);
1006  } else {
1007  put_mb_modes(s, 5 - s->mv_dir, 3, 1, 1);
1008  }
1009  } else { // No coded bloc pattern
1010  put_bits(&s->pb, 5 - s->mv_dir, 2);
1011  put_bits(&s->pb, 2, 1); /* motion_type: field */
1012  s->qscale -= s->dquant;
1013  }
1014  s->misc_bits += get_bits_diff(s);
1015  if (s->mv_dir & MV_DIR_FORWARD) {
1016  for (i = 0; i < 2; i++) {
1017  put_bits(&s->pb, 1, s->field_select[0][i]);
1018  mpeg1_encode_motion(s,
1019  s->mv[0][i][0] - s->last_mv[0][i][0],
1020  s->f_code);
1021  mpeg1_encode_motion(s,
1022  s->mv[0][i][1] - (s->last_mv[0][i][1] >> 1),
1023  s->f_code);
1024  s->last_mv[0][i][0] = s->mv[0][i][0];
1025  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
1026  }
1027  }
1028  if (s->mv_dir & MV_DIR_BACKWARD) {
1029  for (i = 0; i < 2; i++) {
1030  put_bits(&s->pb, 1, s->field_select[1][i]);
1031  mpeg1_encode_motion(s,
1032  s->mv[1][i][0] - s->last_mv[1][i][0],
1033  s->b_code);
1034  mpeg1_encode_motion(s,
1035  s->mv[1][i][1] - (s->last_mv[1][i][1] >> 1),
1036  s->b_code);
1037  s->last_mv[1][i][0] = s->mv[1][i][0];
1038  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
1039  }
1040  }
1041  }
1042  s->mv_bits += get_bits_diff(s);
1043  if (cbp) {
1044  if (chroma_y_shift) {
1045  put_bits(&s->pb,
1046  ff_mpeg12_mbPatTable[cbp][1],
1047  ff_mpeg12_mbPatTable[cbp][0]);
1048  } else {
1049  put_bits(&s->pb,
1050  ff_mpeg12_mbPatTable[cbp >> 2][1],
1051  ff_mpeg12_mbPatTable[cbp >> 2][0]);
1052  put_sbits(&s->pb, 2, cbp);
1053  }
1054  }
1055  }
1056  for (i = 0; i < mb_block_count; i++)
1057  if (cbp & (1 << (mb_block_count - 1 - i)))
1058  mpeg1_encode_block(s, block[i], i);
1059  s->mb_skip_run = 0;
1060  if (s->mb_intra)
1061  s->i_tex_bits += get_bits_diff(s);
1062  else
1063  s->p_tex_bits += get_bits_diff(s);
1064  }
1065 }
1066 
1067 void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
1068  int motion_x, int motion_y)
1069 {
1070  if (s->chroma_format == CHROMA_420)
1071  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6, 1);
1072  else
1073  mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8, 0);
1074 }
1075 
1076 static av_cold void mpeg12_encode_init_static(void)
1077 {
1078  ff_rl_init_level_run(mpeg12_max_level, mpeg12_index_run,
1080 
1081  ff_mpeg1_init_uni_ac_vlc(mpeg12_max_level, mpeg12_index_run,
1082  ff_mpeg1_vlc_table, uni_mpeg1_ac_vlc_len);
1083  ff_mpeg1_init_uni_ac_vlc(mpeg12_max_level, mpeg12_index_run,
1084  ff_mpeg2_vlc_table, uni_mpeg2_ac_vlc_len);
1085 
1086  /* build unified dc encoding tables */
1087  for (int i = -255; i < 256; i++) {
1088  int adiff, index;
1089  int bits, code;
1090  int diff = i;
1091 
1092  adiff = FFABS(diff);
1093  if (diff < 0)
1094  diff--;
1095  index = av_log2(2 * adiff);
1096 
1100  mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
1101 
1105  mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
1106  }
1107 
1108  for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
1109  for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
1110  int len;
1111 
1112  if (mv == 0) {
1113  len = 1; /* ff_mpeg12_mbMotionVectorTable[0][1] */
1114  } else {
1115  int val, bit_size, code;
1116 
1117  bit_size = f_code - 1;
1118 
1119  val = mv;
1120  if (val < 0)
1121  val = -val;
1122  val--;
1123  code = (val >> bit_size) + 1;
1124  if (code < 17)
1126  1 + bit_size;
1127  else
1128  len = 10 /* ff_mpeg12_mbMotionVectorTable[16][1] */ +
1129  2 + bit_size;
1130  }
1131 
1132  mv_penalty[f_code][mv + MAX_DMV] = len;
1133  }
1134 
1135 
1136  for (int f_code = MAX_FCODE; f_code > 0; f_code--)
1137  for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
1138  fcode_tab[mv + MAX_MV] = f_code;
1139 }
1140 
1142 {
1143  static AVOnce init_static_once = AV_ONCE_INIT;
1144 
1145  s->y_dc_scale_table =
1146  s->c_dc_scale_table = ff_mpeg12_dc_scale_table[s->intra_dc_precision];
1147 
1148  s->me.mv_penalty = mv_penalty;
1149  s->fcode_tab = fcode_tab;
1150  if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
1151  s->min_qcoeff = -255;
1152  s->max_qcoeff = 255;
1153  } else {
1154  s->min_qcoeff = -2047;
1155  s->max_qcoeff = 2047;
1156  s->mpeg_quant = 1;
1157  }
1158  if (s->intra_vlc_format) {
1159  s->intra_ac_vlc_length =
1160  s->intra_ac_vlc_last_length = uni_mpeg2_ac_vlc_len;
1161  } else {
1162  s->intra_ac_vlc_length =
1163  s->intra_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1164  }
1165  s->inter_ac_vlc_length =
1166  s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
1167 
1168  ff_thread_once(&init_static_once, mpeg12_encode_init_static);
1169 }
1170 
1171 #define OFFSET(x) offsetof(MPEG12EncContext, x)
1172 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
1173 #define COMMON_OPTS \
1174  { "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
1175  OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
1176  { "drop_frame_timecode", "Timecode is in drop frame format.", \
1177  OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1178  { "scan_offset", "Reserve space for SVCD scan offset user data.", \
1179  OFFSET(scan_offset), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
1180  { "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
1181  OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = -1 }, -1, INT64_MAX, VE}, \
1182  FF_MPV_COMMON_BFRAME_OPTS
1183 
1184 static const AVOption mpeg1_options[] = {
1185  COMMON_OPTS
1188  { NULL },
1189 };
1190 
1191 static const AVOption mpeg2_options[] = {
1192  COMMON_OPTS
1193  { "intra_vlc", "Use MPEG-2 intra VLC table.",
1194  FF_MPV_OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1195  { "non_linear_quant", "Use nonlinear quantizer.", FF_MPV_OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1196  { "alternate_scan", "Enable alternate scantable.", FF_MPV_OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1197  { "a53cc", "Use A53 Closed Captions (if available)", OFFSET(a53_cc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE },
1198  { "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, .unit = "seq_disp_ext" },
1199  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, VE, .unit = "seq_disp_ext" },
1200  { "never", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, VE, .unit = "seq_disp_ext" },
1201  { "always", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, VE, .unit = "seq_disp_ext" },
1202  { "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, .unit = "video_format" },
1203  { "component", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_COMPONENT }, 0, 0, VE, .unit = "video_format" },
1204  { "pal", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_PAL }, 0, 0, VE, .unit = "video_format" },
1205  { "ntsc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_NTSC }, 0, 0, VE, .unit = "video_format" },
1206  { "secam", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_SECAM }, 0, 0, VE, .unit = "video_format" },
1207  { "mac", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_MAC }, 0, 0, VE, .unit = "video_format" },
1208  { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = VIDEO_FORMAT_UNSPECIFIED}, 0, 0, VE, .unit = "video_format" },
1209 #define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, .unit = "avctx.level"
1210  { LEVEL("high", 4) },
1211  { LEVEL("high1440", 6) },
1212  { LEVEL("main", 8) },
1213  { LEVEL("low", 10) },
1214 #undef LEVEL
1218  { NULL },
1219 };
1220 
1221 #define mpeg12_class(x) \
1222 static const AVClass mpeg ## x ## _class = { \
1223  .class_name = "mpeg" # x "video encoder", \
1224  .item_name = av_default_item_name, \
1225  .option = mpeg ## x ## _options, \
1226  .version = LIBAVUTIL_VERSION_INT, \
1227 };
1228 
1229 mpeg12_class(1)
1230 mpeg12_class(2)
1231 
1233  .p.name = "mpeg1video",
1234  CODEC_LONG_NAME("MPEG-1 video"),
1235  .p.type = AVMEDIA_TYPE_VIDEO,
1236  .p.id = AV_CODEC_ID_MPEG1VIDEO,
1237  .priv_data_size = sizeof(MPEG12EncContext),
1238  .init = encode_init,
1240  .close = ff_mpv_encode_end,
1241  .p.supported_framerates = ff_mpeg12_frame_rate_tab + 1,
1242  .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1243  AV_PIX_FMT_NONE },
1244  .color_ranges = AVCOL_RANGE_MPEG,
1245  .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1247  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1248  .p.priv_class = &mpeg1_class,
1249 };
1250 
1252  .p.name = "mpeg2video",
1253  CODEC_LONG_NAME("MPEG-2 video"),
1254  .p.type = AVMEDIA_TYPE_VIDEO,
1255  .p.id = AV_CODEC_ID_MPEG2VIDEO,
1256  .priv_data_size = sizeof(MPEG12EncContext),
1257  .init = encode_init,
1259  .close = ff_mpv_encode_end,
1260  .p.supported_framerates = ff_mpeg2_frame_rate_tab,
1261  .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
1263  AV_PIX_FMT_NONE },
1264  .color_ranges = AVCOL_RANGE_MPEG,
1265  .p.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
1267  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1268  .p.priv_class = &mpeg2_class,
1269 };
1270 #endif /* CONFIG_MPEG1VIDEO_ENCODER || CONFIG_MPEG2VIDEO_ENCODER */
error
static void error(const char *err)
Definition: target_bsf_fuzzer.c:32
PICT_FRAME
#define PICT_FRAME
Definition: mpegutils.h:33
MV_TYPE_16X16
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:265
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:215
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
level
uint8_t level
Definition: svq3.c:205
ff_mpeg2_aspect
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:380
FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: codec_internal.h:43
get_bits_diff
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideoenc.h:158
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
AV_STEREO3D_SIDEBYSIDE_QUINCUNX
@ AV_STEREO3D_SIDEBYSIDE_QUINCUNX
Views are next to each other, but when upscaling apply a checkerboard pattern.
Definition: stereo3d.h:114
put_bits32
static void av_unused put_bits32(PutBitContext *s, uint32_t value)
Write exactly 32 bits into a bitstream.
Definition: put_bits.h:291
ff_mpeg1_encode_mb
void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64], int motion_x, int motion_y)
AVCodec::long_name
const char * long_name
Descriptive name for the codec, meant to be more human readable than name.
Definition: codec.h:199
fcode_tab
static uint8_t fcode_tab[MAX_MV *2+1]
Minimal fcode that a motion vector component would need.
Definition: ituh263enc.c:58
align_put_bits
static void align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: put_bits.h:420
av_frame_get_side_data
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:963
thread.h
AV_FRAME_DATA_A53_CC
@ AV_FRAME_DATA_A53_CC
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:59
EXT_START_CODE
#define EXT_START_CODE
Definition: cavs.h:39
AVPanScan
Pan Scan area.
Definition: defs.h:242
mpegvideoenc.h
int64_t
long long int64_t
Definition: coverity.c:34
mv
static const int8_t mv[256][2]
Definition: 4xm.c:81
ff_rl_init_level_run
av_cold void ff_rl_init_level_run(uint8_t max_level[MAX_LEVEL+1], uint8_t index_run[MAX_RUN+1], const uint8_t table_run[], const uint8_t table_level[], int n)
Initialize max_level and index_run from table_run and table_level; this is equivalent to initializing...
Definition: rl.c:27
put_sbits
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:281
MAX_RUN
#define MAX_RUN
Definition: rl.h:35
av_log2_16bit
int av_log2_16bit(unsigned v)
Definition: intmath.c:31
MPEG12_RL_NB_ELEMS
#define MPEG12_RL_NB_ELEMS
Definition: mpeg12vlc.h:52
put_bits
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:223
MAX_DMV
#define MAX_DMV
Definition: motion_est.h:38
AVOption
AVOption.
Definition: opt.h:429
AVCOL_TRC_UNSPECIFIED
@ AVCOL_TRC_UNSPECIFIED
Definition: pixfmt.h:614
put_bytes_count
static int put_bytes_count(const PutBitContext *s, int round_up)
Definition: put_bits.h:100
AV_ROUND_ZERO
@ AV_ROUND_ZERO
Round toward zero.
Definition: mathematics.h:131
FFCodec
Definition: codec_internal.h:127
MASK_ABS
#define MASK_ABS(mask, level)
Definition: mathops.h:165
ff_mpeg2video_encoder
const FFCodec ff_mpeg2video_encoder
ff_mpeg12_dc_scale_table
const uint8_t ff_mpeg12_dc_scale_table[4][32]
Definition: mpegvideodata.c:33
mpegvideo.h
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: defs.h:62
mpegutils.h
ff_mpeg12_vlc_dc_chroma_bits
const unsigned char ff_mpeg12_vlc_dc_chroma_bits[12]
Definition: mpeg12data.c:63
SEQ_START_CODE
#define SEQ_START_CODE
Definition: mpeg12.h:29
MV_DIR_BACKWARD
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:262
ff_mpeg12_vlc_dc_lum_bits
const unsigned char ff_mpeg12_vlc_dc_lum_bits[12]
Definition: mpeg12data.c:56
av_gcd
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
Definition: mathematics.c:37
AV_FRAME_FLAG_TOP_FIELD_FIRST
#define AV_FRAME_FLAG_TOP_FIELD_FIRST
A flag to mark frames where the top field is displayed first if the content is interlaced.
Definition: frame.h:653
FF_MPV_COMMON_MOTION_EST_OPTS
#define FF_MPV_COMMON_MOTION_EST_OPTS
Definition: mpegvideoenc.h:127
MAX_FCODE
#define MAX_FCODE
Definition: mpegutils.h:36
ff_mpeg12_mbAddrIncrTable
const uint8_t ff_mpeg12_mbAddrIncrTable[36][2]
Definition: mpeg12data.c:167
AV_STEREO3D_SIDEBYSIDE
@ AV_STEREO3D_SIDEBYSIDE
Views are next to each other.
Definition: stereo3d.h:64
ff_mpv_encode_picture
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic_arg, int *got_packet)
Definition: mpegvideo_enc.c:1793
FF_MPV_COMMON_OPTS
#define FF_MPV_COMMON_OPTS
Definition: mpegvideoenc.h:84
ff_mpeg2_frame_rate_tab
const AVRational ff_mpeg2_frame_rate_tab[]
Definition: mpeg12data.c:293
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:460
mpeg12enc.h
AV_STEREO3D_2D
@ AV_STEREO3D_2D
Video is not stereoscopic (and metadata has to be there).
Definition: stereo3d.h:52
timecode.h
mv_penalty
static uint8_t mv_penalty[MAX_FCODE+1][MAX_DMV *2+1]
Table of number of bits a motion vector component needs.
Definition: ituh263enc.c:53
ff_mpeg12_mbMotionVectorTable
const uint8_t ff_mpeg12_mbMotionVectorTable[17][2]
Definition: mpeg12data.c:273
AVPanScan::width
int width
width and height in 1/16 pel
Definition: defs.h:255
mpeg12vlc.h
val
static double val(void *priv, double ch)
Definition: aeval.c:77
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:320
AVRational::num
int num
Numerator.
Definition: rational.h:59
GOP_START_CODE
#define GOP_START_CODE
Definition: mpeg12.h:30
encode_init
static av_cold int encode_init(AVCodecContext *avctx)
Definition: asvenc.c:321
avassert.h
mpeg12.h
ff_thread_once
static int ff_thread_once(char *control, void(*routine)(void))
Definition: thread.h:205
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
AVFrameSideData::size
size_t size
Definition: frame.h:268
av_cold
#define av_cold
Definition: attributes.h:90
MAX_MV
#define MAX_MV
Definition: motion_est.h:36
AV_PROFILE_UNKNOWN
#define AV_PROFILE_UNKNOWN
Definition: defs.h:65
AV_FRAME_FLAG_KEY
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
Definition: frame.h:640
A53_MAX_CC_COUNT
#define A53_MAX_CC_COUNT
Definition: mpeg12dec.c:63
stereo3d.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
ff_mpeg1_aspect
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:359
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE
This encoder can reorder user opaque values from input AVFrames and return them with corresponding ou...
Definition: codec.h:159
bits
uint8_t bits
Definition: vp3data.h:128
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
ff_write_quant_matrix
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
Definition: mpegvideo_enc.c:224
FF_MPV_OFFSET
#define FF_MPV_OFFSET(x)
Definition: mpegvideoenc.h:82
av_timecode_adjust_ntsc_framenum2
int av_timecode_adjust_ntsc_framenum2(int framenum, int fps)
Adjust frame number for NTSC drop frame time code.
Definition: timecode.c:35
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:73
AVCOL_PRI_UNSPECIFIED
@ AVCOL_PRI_UNSPECIFIED
Definition: pixfmt.h:589
ff_mpeg1video_encoder
const FFCodec ff_mpeg1video_encoder
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:296
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:461
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:74
if
if(ret)
Definition: filter_design.txt:179
framerate
float framerate
Definition: av1_levels.c:29
AV_ONCE_INIT
#define AV_ONCE_INIT
Definition: thread.h:203
NULL
#define NULL
Definition: coverity.c:32
run
uint8_t run
Definition: svq3.c:204
SLICE_MIN_START_CODE
#define SLICE_MIN_START_CODE
Definition: mpeg12.h:32
AV_LEVEL_UNKNOWN
#define AV_LEVEL_UNKNOWN
Definition: defs.h:198
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
profiles.h
mathops.h
ff_mpv_encode_end
av_cold int ff_mpv_encode_end(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:1028
abs
#define abs(x)
Definition: cuda_runtime.h:35
COMMON_OPTS
#define COMMON_OPTS
Definition: f_segment.c:264
AVCodecContext::level
int level
Encoding level descriptor.
Definition: avcodec.h:1794
AVOnce
#define AVOnce
Definition: thread.h:202
index
int index
Definition: gxfenc.c:90
ff_mpeg1_encode_init
void ff_mpeg1_encode_init(MpegEncContext *s)
AV_CODEC_ID_MPEG1VIDEO
@ AV_CODEC_ID_MPEG1VIDEO
Definition: codec_id.h:53
ff_mpeg12_run
const int8_t ff_mpeg12_run[MPEG12_RL_NB_ELEMS]
Definition: mpeg12data.c:150
MAX_LEVEL
#define MAX_LEVEL
Definition: rl.h:36
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:550
av_rescale_rnd
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:368
dc
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled top and top right vectors is used as motion vector prediction the used motion vector is the sum of the predictor and(mvx_diff, mvy_diff) *mv_scale Intra DC Prediction block[y][x] dc[1]
Definition: snow.txt:400
AV_FRAME_DATA_PANSCAN
@ AV_FRAME_DATA_PANSCAN
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:53
height
#define height
Definition: dsp.h:85
codec_internal.h
ff_mpeg12_level
const int8_t ff_mpeg12_level[MPEG12_RL_NB_ELEMS]
Definition: mpeg12data.c:133
AVFrameSideData::data
uint8_t * data
Definition: frame.h:267
PICTURE_START_CODE
#define PICTURE_START_CODE
Definition: mpeg12.h:31
USER_START_CODE
#define USER_START_CODE
Definition: cavs.h:40
range
enum AVColorRange range
Definition: mediacodec_wrapper.c:2594
header
static const uint8_t header[24]
Definition: sdr2.c:68
diff
static av_always_inline int diff(const struct color_info *a, const struct color_info *b, const int trans_thresh)
Definition: vf_paletteuse.c:166
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:114
mpegvideodata.h
attributes.h
MV_TYPE_FIELD
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:268
FF_COMPLIANCE_UNOFFICIAL
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: defs.h:61
av_zero_extend
#define av_zero_extend
Definition: common.h:151
UNI_AC_ENC_INDEX
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideoenc.h:36
encode_dc
static void encode_dc(PutBitContext *pb, int diff, int component)
Definition: speedhqenc.c:169
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:220
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:67
CHROMA_420
#define CHROMA_420
Definition: mpegvideo.h:459
log.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
code
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
Definition: filter_design.txt:178
AV_STEREO3D_TOPBOTTOM
@ AV_STEREO3D_TOPBOTTOM
Views are on top of each other.
Definition: stereo3d.h:76
av_always_inline
#define av_always_inline
Definition: attributes.h:49
AV_FRAME_DATA_STEREO3D
@ AV_FRAME_DATA_STEREO3D
Stereoscopic 3d metadata.
Definition: frame.h:64
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
len
int len
Definition: vorbis_enc_data.h:426
AVCOL_SPC_UNSPECIFIED
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:643
AVCodecContext::height
int height
Definition: avcodec.h:624
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:663
FF_MPEG2_PROFILE_OPTS
#define FF_MPEG2_PROFILE_OPTS
Definition: profiles.h:48
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:700
ff_mpeg1_init_uni_ac_vlc
av_cold void ff_mpeg1_init_uni_ac_vlc(const int8_t max_level[], const uint8_t index_run[], const uint16_t table_vlc[][2], uint8_t uni_ac_vlc_len[])
Definition: mpeg12enc.c:101
ff_mpeg12_mbPatTable
const uint8_t ff_mpeg12_mbPatTable[64][2]
Definition: mpeg12data.c:206
avcodec.h
av_cmp_q
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
ff_mpeg12_vlc_dc_chroma_code
const uint16_t ff_mpeg12_vlc_dc_chroma_code[12]
Definition: mpeg12data.c:60
AV_TIMECODE_FLAG_DROPFRAME
@ AV_TIMECODE_FLAG_DROPFRAME
timecode is drop frame
Definition: timecode.h:36
put_header
static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
Definition: asfenc.c:259
ff_mpeg12_frame_rate_tab
const AVRational ff_mpeg12_frame_rate_tab[]
Definition: mpeg12framerate.c:24
AV_CODEC_FLAG_CLOSED_GOP
#define AV_CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:352
ret
ret
Definition: filter_design.txt:187
AVCodecContext::strict_std_compliance
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:1389
AVStereo3D::type
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:207
ff_mpeg1_encode_picture_header
void ff_mpeg1_encode_picture_header(MpegEncContext *s)
ff_mpeg1_vlc_table
const uint16_t ff_mpeg1_vlc_table[MPEG12_RL_NB_ELEMS+2][2]
Definition: mpeg12data.c:67
mpeg12data.h
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:129
OFFSET
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your see the OFFSET() macro
AVCodecContext
main external API structure.
Definition: avcodec.h:451
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:281
AV_PROFILE_MPEG2_HIGH
#define AV_PROFILE_MPEG2_HIGH
Definition: defs.h:101
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
AVCodecContext::profile
int profile
profile
Definition: avcodec.h:1650
ff_mpeg2_vlc_table
const uint16_t ff_mpeg2_vlc_table[MPEG12_RL_NB_ELEMS+2][2]
Definition: mpeg12data.c:100
AV_PROFILE_MPEG2_422
#define AV_PROFILE_MPEG2_422
Definition: defs.h:100
sign_extend
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:131
AV_PROFILE_MPEG2_MAIN
#define AV_PROFILE_MPEG2_MAIN
Definition: defs.h:104
AV_CODEC_CAP_DELAY
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:76
LEVEL
#define LEVEL(name, value)
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
AV_PICTURE_TYPE_P
@ AV_PICTURE_TYPE_P
Predicted.
Definition: avutil.h:280
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:77
ff_mpv_encode_init
av_cold int ff_mpv_encode_init(AVCodecContext *avctx)
Definition: mpegvideo_enc.c:351
AVFrameSideData
Structure to hold side data for an AVFrame.
Definition: frame.h:265
av_nearer_q
int av_nearer_q(AVRational q, AVRational q1, AVRational q2)
Find which of the two rationals is closer to another rational.
Definition: rational.c:125
MV_DIR_FORWARD
#define MV_DIR_FORWARD
Definition: mpegvideo.h:261
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:478
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
rl.h
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:624
ff_mpeg12_vlc_dc_lum_code
const uint16_t ff_mpeg12_vlc_dc_lum_code[12]
Definition: mpeg12data.c:53
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
VE
#define VE
Definition: amfenc_av1.c:30
AVPanScan::height
int height
Definition: defs.h:256
av_timecode_init_from_string
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:253
AVStereo3D
Stereo 3D type: this structure describes how two videos are packed within a single video surface,...
Definition: stereo3d.h:203
width
#define width
Definition: dsp.h:85
AVTimecode
Definition: timecode.h:41
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:54
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:73
av_log2
int av_log2(unsigned v)
Definition: intmath.c:26
ff_mpeg1_encode_slice_header
void ff_mpeg1_encode_slice_header(MpegEncContext *s)