mpeg12enc.c
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1 /*
2  * MPEG1/2 encoder
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
5  *
6  * This file is part of Libav.
7  *
8  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
28 #include "avcodec.h"
29 #include "dsputil.h"
30 #include "mathops.h"
31 #include "mpegvideo.h"
32 
33 #include "mpeg12.h"
34 #include "mpeg12data.h"
35 #include "bytestream.h"
36 
37 #include "libavutil/log.h"
38 #include "libavutil/opt.h"
39 
40 static const uint8_t inv_non_linear_qscale[13] = {
41  0, 2, 4, 6, 8,
42  9,10,11,12,13,14,15,16,
43 };
44 
46  0x10, 0x0E,
47  0x00, 0x80, 0x81,
48  0x00, 0x80, 0x81,
49  0xff, 0xff, 0xff,
50  0xff, 0xff, 0xff,
51 };
52 
53 static void mpeg1_encode_block(MpegEncContext *s,
54  DCTELEM *block,
55  int component);
56 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
57 
59 static uint8_t fcode_tab[MAX_MV*2+1];
60 
61 static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
62 static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
63 
64 /* simple include everything table for dc, first byte is bits number next 3 are code*/
65 static uint32_t mpeg1_lum_dc_uni[512];
66 static uint32_t mpeg1_chr_dc_uni[512];
67 
68 static uint8_t mpeg1_index_run[2][64];
69 static int8_t mpeg1_max_level[2][64];
70 
71 static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
72  int i;
73 
74  for(i=0; i<128; i++){
75  int level= i-64;
76  int run;
77  if (!level)
78  continue;
79  for(run=0; run<64; run++){
80  int len, code;
81 
82  int alevel= FFABS(level);
83 
84  if (alevel > rl->max_level[0][run])
85  code= 111; /*rl->n*/
86  else
87  code= rl->index_run[0][run] + alevel - 1;
88 
89  if (code < 111 /* rl->n */) {
90  /* length of vlc and sign */
91  len= rl->table_vlc[code][1]+1;
92  } else {
93  len= rl->table_vlc[111/*rl->n*/][1]+6;
94 
95  if (alevel < 128) {
96  len += 8;
97  } else {
98  len += 16;
99  }
100  }
101 
102  uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
103  }
104  }
105 }
106 
107 
109  int i;
110  int64_t dmin= INT64_MAX;
111  int64_t d;
112 
113  for(i=1;i<14;i++) {
114  int64_t n0 = 1001LL / ff_mpeg12_frame_rate_tab[i].den * ff_mpeg12_frame_rate_tab[i].num * s->avctx->time_base.num;
115  int64_t n1= 1001LL*s->avctx->time_base.den;
116  if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
117 
118  d = FFABS(n0 - n1);
119  if(d < dmin){
120  dmin=d;
121  s->frame_rate_index= i;
122  }
123  }
124  if(dmin)
125  return -1;
126  else
127  return 0;
128 }
129 
131 {
132  MpegEncContext *s = avctx->priv_data;
133 
134  if(ff_MPV_encode_init(avctx) < 0)
135  return -1;
136 
137  if(find_frame_rate_index(s) < 0){
139  av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
140  return -1;
141  }else{
142  av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
143  }
144  }
145 
146  if(avctx->profile == FF_PROFILE_UNKNOWN){
147  if(avctx->level != FF_LEVEL_UNKNOWN){
148  av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
149  return -1;
150  }
151  avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
152  }
153 
154  if(avctx->level == FF_LEVEL_UNKNOWN){
155  if(avctx->profile == 0){ /* 4:2:2 */
156  if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
157  else avctx->level = 2; /* High */
158  }else{
159  if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
160  av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
161  return -1;
162  }
163  if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
164  else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
165  else avctx->level = 4; /* High */
166  }
167  }
168 
169  if (s->drop_frame_timecode && s->frame_rate_index != 4) {
170  av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
171  return -1;
172  }
173 
174  return 0;
175 }
176 
177 static void put_header(MpegEncContext *s, int header)
178 {
180  put_bits(&s->pb, 16, header>>16);
181  put_sbits(&s->pb, 16, header);
182 }
183 
184 /* put sequence header if needed */
186 {
187  unsigned int vbv_buffer_size;
188  unsigned int fps, v;
189  int i;
190  uint64_t time_code;
191  float best_aspect_error= 1E10;
192  float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
193  int constraint_parameter_flag;
194 
195  if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
196 
197  if (s->current_picture.f.key_frame) {
199 
200  /* mpeg1 header repeated every gop */
202 
203  put_sbits(&s->pb, 12, s->width );
204  put_sbits(&s->pb, 12, s->height);
205 
206  for(i=1; i<15; i++){
207  float error= aspect_ratio;
208  if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <=1)
209  error-= 1.0/ff_mpeg1_aspect[i];
210  else
211  error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
212 
213  error= FFABS(error);
214 
215  if(error < best_aspect_error){
216  best_aspect_error= error;
217  s->aspect_ratio_info= i;
218  }
219  }
220 
221  put_bits(&s->pb, 4, s->aspect_ratio_info);
222  put_bits(&s->pb, 4, s->frame_rate_index);
223 
224  if(s->avctx->rc_max_rate){
225  v = (s->avctx->rc_max_rate + 399) / 400;
226  if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
227  v = 0x3ffff;
228  }else{
229  v= 0x3FFFF;
230  }
231 
232  if(s->avctx->rc_buffer_size)
233  vbv_buffer_size = s->avctx->rc_buffer_size;
234  else
235  /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
236  vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
237  vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
238 
239  put_sbits(&s->pb, 18, v);
240  put_bits(&s->pb, 1, 1); /* marker */
241  put_sbits(&s->pb, 10, vbv_buffer_size);
242 
243  constraint_parameter_flag=
244  s->width <= 768 && s->height <= 576 &&
245  s->mb_width * s->mb_height <= 396 &&
246  s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
247  framerate.num <= framerate.den*30 &&
248  s->avctx->me_range && s->avctx->me_range < 128 &&
249  vbv_buffer_size <= 20 &&
250  v <= 1856000/400 &&
252 
253  put_bits(&s->pb, 1, constraint_parameter_flag);
254 
257 
260  put_bits(&s->pb, 4, 1); //seq ext
261 
262  put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
263 
264  put_bits(&s->pb, 3, s->avctx->profile); //profile
265  put_bits(&s->pb, 4, s->avctx->level); //level
266 
267  put_bits(&s->pb, 1, s->progressive_sequence);
268  put_bits(&s->pb, 2, s->chroma_format);
269  put_bits(&s->pb, 2, s->width >>12);
270  put_bits(&s->pb, 2, s->height>>12);
271  put_bits(&s->pb, 12, v>>18); //bitrate ext
272  put_bits(&s->pb, 1, 1); //marker
273  put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
274  put_bits(&s->pb, 1, s->low_delay);
275  put_bits(&s->pb, 2, 0); // frame_rate_ext_n
276  put_bits(&s->pb, 5, 0); // frame_rate_ext_d
277  }
278 
280  put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */
281  /* time code : we must convert from the real frame rate to a
282  fake mpeg frame rate in case of low frame rate */
283  fps = (framerate.num + framerate.den/2)/ framerate.den;
285 
287  if (s->drop_frame_timecode) {
288  /* only works for NTSC 29.97 */
289  int d = time_code / 17982;
290  int m = time_code % 17982;
291  //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
292  time_code += 18 * d + 2 * ((m - 2) / 1798);
293  }
294  put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
295  put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
296  put_bits(&s->pb, 1, 1);
297  put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
298  put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
299  put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
300  put_bits(&s->pb, 1, 0); /* broken link */
301  }
302 }
303 
304 static inline void encode_mb_skip_run(MpegEncContext *s, int run){
305  while (run >= 33) {
306  put_bits(&s->pb, 11, 0x008);
307  run -= 33;
308  }
310  ff_mpeg12_mbAddrIncrTable[run][0]);
311 }
312 
314 {
315  if(s->q_scale_type){
316  assert(s->qscale>=1 && s->qscale <=12);
318  }else{
319  put_bits(&s->pb, 5, s->qscale);
320  }
321 }
322 
324  if (s->height > 2800) {
325  put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
326  put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
327  } else {
329  }
330  put_qscale(s);
331  put_bits(&s->pb, 1, 0); /* slice extra information */
332 }
333 
334 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
335 {
337 
338  /* mpeg1 picture header */
340  /* temporal reference */
341 
342  // RAL: s->picture_number instead of s->fake_picture_number
343  put_bits(&s->pb, 10, (s->picture_number -
344  s->gop_picture_number) & 0x3ff);
345  put_bits(&s->pb, 3, s->pict_type);
346 
347  s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
348  put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
349 
350  // RAL: Forward f_code also needed for B frames
352  put_bits(&s->pb, 1, 0); /* half pel coordinates */
354  put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
355  else
356  put_bits(&s->pb, 3, 7); /* forward_f_code */
357  }
358 
359  // RAL: Backward f_code necessary for B frames
360  if (s->pict_type == AV_PICTURE_TYPE_B) {
361  put_bits(&s->pb, 1, 0); /* half pel coordinates */
363  put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
364  else
365  put_bits(&s->pb, 3, 7); /* backward_f_code */
366  }
367 
368  put_bits(&s->pb, 1, 0); /* extra bit picture */
369 
370  s->frame_pred_frame_dct = 1;
373  put_bits(&s->pb, 4, 8); //pic ext
375  put_bits(&s->pb, 4, s->f_code);
376  put_bits(&s->pb, 4, s->f_code);
377  }else{
378  put_bits(&s->pb, 8, 255);
379  }
380  if (s->pict_type == AV_PICTURE_TYPE_B) {
381  put_bits(&s->pb, 4, s->b_code);
382  put_bits(&s->pb, 4, s->b_code);
383  }else{
384  put_bits(&s->pb, 8, 255);
385  }
386  put_bits(&s->pb, 2, s->intra_dc_precision);
387 
388  assert(s->picture_structure == PICT_FRAME);
389  put_bits(&s->pb, 2, s->picture_structure);
390  if (s->progressive_sequence) {
391  put_bits(&s->pb, 1, 0); /* no repeat */
392  } else {
394  }
395  /* XXX: optimize the generation of this flag with entropy
396  measures */
398 
399  put_bits(&s->pb, 1, s->frame_pred_frame_dct);
401  put_bits(&s->pb, 1, s->q_scale_type);
402  put_bits(&s->pb, 1, s->intra_vlc_format);
403  put_bits(&s->pb, 1, s->alternate_scan);
404  put_bits(&s->pb, 1, s->repeat_first_field);
406  put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
407  put_bits(&s->pb, 1, s->progressive_frame);
408  put_bits(&s->pb, 1, 0); //composite_display_flag
409  }
410  if (s->scan_offset) {
411  int i;
412 
414  for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
416  }
417  }
418 
419  s->mb_y=0;
421 }
422 
423 static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
424  int has_mv, int field_motion)
425 {
426  put_bits(&s->pb, n, bits);
427  if (!s->frame_pred_frame_dct) {
428  if (has_mv)
429  put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
430  put_bits(&s->pb, 1, s->interlaced_dct);
431  }
432 }
433 
435  DCTELEM block[6][64],
436  int motion_x, int motion_y,
437  int mb_block_count)
438 {
439  int i, cbp;
440  const int mb_x = s->mb_x;
441  const int mb_y = s->mb_y;
442  const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
443 
444  /* compute cbp */
445  cbp = 0;
446  for(i=0;i<mb_block_count;i++) {
447  if (s->block_last_index[i] >= 0)
448  cbp |= 1 << (mb_block_count - 1 - i);
449  }
450 
451  if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
452  (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
453  ((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
454  (s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
455  ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
456  s->mb_skip_run++;
457  s->qscale -= s->dquant;
458  s->skip_count++;
459  s->misc_bits++;
460  s->last_bits++;
461  if(s->pict_type == AV_PICTURE_TYPE_P){
462  s->last_mv[0][1][0]= s->last_mv[0][0][0]=
463  s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
464  }
465  } else {
466  if(first_mb){
467  assert(s->mb_skip_run == 0);
468  encode_mb_skip_run(s, s->mb_x);
469  }else{
471  }
472 
473  if (s->pict_type == AV_PICTURE_TYPE_I) {
474  if(s->dquant && cbp){
475  put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
476  put_qscale(s);
477  }else{
478  put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
479  s->qscale -= s->dquant;
480  }
481  s->misc_bits+= get_bits_diff(s);
482  s->i_count++;
483  } else if (s->mb_intra) {
484  if(s->dquant && cbp){
485  put_mb_modes(s, 6, 0x01, 0, 0);
486  put_qscale(s);
487  }else{
488  put_mb_modes(s, 5, 0x03, 0, 0);
489  s->qscale -= s->dquant;
490  }
491  s->misc_bits+= get_bits_diff(s);
492  s->i_count++;
493  memset(s->last_mv, 0, sizeof(s->last_mv));
494  } else if (s->pict_type == AV_PICTURE_TYPE_P) {
495  if(s->mv_type == MV_TYPE_16X16){
496  if (cbp != 0) {
497  if ((motion_x|motion_y) == 0) {
498  if(s->dquant){
499  put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
500  put_qscale(s);
501  }else{
502  put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
503  }
504  s->misc_bits+= get_bits_diff(s);
505  } else {
506  if(s->dquant){
507  put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
508  put_qscale(s);
509  }else{
510  put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
511  }
512  s->misc_bits+= get_bits_diff(s);
513  mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
514  mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
515  s->mv_bits+= get_bits_diff(s);
516  }
517  } else {
518  put_bits(&s->pb, 3, 1); /* motion only */
519  if (!s->frame_pred_frame_dct)
520  put_bits(&s->pb, 2, 2); /* motion_type: frame */
521  s->misc_bits+= get_bits_diff(s);
522  mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
523  mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
524  s->qscale -= s->dquant;
525  s->mv_bits+= get_bits_diff(s);
526  }
527  s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
528  s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
529  }else{
530  assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
531 
532  if (cbp) {
533  if(s->dquant){
534  put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
535  put_qscale(s);
536  }else{
537  put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
538  }
539  } else {
540  put_bits(&s->pb, 3, 1); /* motion only */
541  put_bits(&s->pb, 2, 1); /* motion_type: field */
542  s->qscale -= s->dquant;
543  }
544  s->misc_bits+= get_bits_diff(s);
545  for(i=0; i<2; i++){
546  put_bits(&s->pb, 1, s->field_select[0][i]);
547  mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
548  mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
549  s->last_mv[0][i][0]= s->mv[0][i][0];
550  s->last_mv[0][i][1]= 2*s->mv[0][i][1];
551  }
552  s->mv_bits+= get_bits_diff(s);
553  }
554  if(cbp) {
555  if (s->chroma_y_shift) {
556  put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
557  } else {
558  put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
559  put_sbits(&s->pb, 2, cbp);
560  }
561  }
562  s->f_count++;
563  } else{
564  if(s->mv_type == MV_TYPE_16X16){
565  if (cbp){ // With coded bloc pattern
566  if (s->dquant) {
567  if(s->mv_dir == MV_DIR_FORWARD)
568  put_mb_modes(s, 6, 3, 1, 0);
569  else
570  put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
571  put_qscale(s);
572  } else {
573  put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
574  }
575  }else{ // No coded bloc pattern
576  put_bits(&s->pb, 5-s->mv_dir, 2);
577  if (!s->frame_pred_frame_dct)
578  put_bits(&s->pb, 2, 2); /* motion_type: frame */
579  s->qscale -= s->dquant;
580  }
581  s->misc_bits += get_bits_diff(s);
582  if (s->mv_dir&MV_DIR_FORWARD){
583  mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
584  mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
585  s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
586  s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
587  s->f_count++;
588  }
589  if (s->mv_dir&MV_DIR_BACKWARD){
590  mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
591  mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
592  s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
593  s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
594  s->b_count++;
595  }
596  }else{
597  assert(s->mv_type == MV_TYPE_FIELD);
598  assert(!s->frame_pred_frame_dct);
599  if (cbp){ // With coded bloc pattern
600  if (s->dquant) {
601  if(s->mv_dir == MV_DIR_FORWARD)
602  put_mb_modes(s, 6, 3, 1, 1);
603  else
604  put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
605  put_qscale(s);
606  } else {
607  put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
608  }
609  }else{ // No coded bloc pattern
610  put_bits(&s->pb, 5-s->mv_dir, 2);
611  put_bits(&s->pb, 2, 1); /* motion_type: field */
612  s->qscale -= s->dquant;
613  }
614  s->misc_bits += get_bits_diff(s);
615  if (s->mv_dir&MV_DIR_FORWARD){
616  for(i=0; i<2; i++){
617  put_bits(&s->pb, 1, s->field_select[0][i]);
618  mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
619  mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
620  s->last_mv[0][i][0]= s->mv[0][i][0];
621  s->last_mv[0][i][1]= 2*s->mv[0][i][1];
622  }
623  s->f_count++;
624  }
625  if (s->mv_dir&MV_DIR_BACKWARD){
626  for(i=0; i<2; i++){
627  put_bits(&s->pb, 1, s->field_select[1][i]);
628  mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
629  mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
630  s->last_mv[1][i][0]= s->mv[1][i][0];
631  s->last_mv[1][i][1]= 2*s->mv[1][i][1];
632  }
633  s->b_count++;
634  }
635  }
636  s->mv_bits += get_bits_diff(s);
637  if(cbp) {
638  if (s->chroma_y_shift) {
639  put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
640  } else {
641  put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
642  put_sbits(&s->pb, 2, cbp);
643  }
644  }
645  }
646  for(i=0;i<mb_block_count;i++) {
647  if (cbp & (1 << (mb_block_count - 1 - i))) {
648  mpeg1_encode_block(s, block[i], i);
649  }
650  }
651  s->mb_skip_run = 0;
652  if(s->mb_intra)
653  s->i_tex_bits+= get_bits_diff(s);
654  else
655  s->p_tex_bits+= get_bits_diff(s);
656  }
657 }
658 
659 void ff_mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
660 {
661  if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
662  else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
663 }
664 
665 // RAL: Parameter added: f_or_b_code
666 static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
667 {
668  if (val == 0) {
669  /* zero vector */
670  put_bits(&s->pb,
673  } else {
674  int code, sign, bits;
675  int bit_size = f_or_b_code - 1;
676  int range = 1 << bit_size;
677  /* modulo encoding */
678  val = sign_extend(val, 5 + bit_size);
679 
680  if (val >= 0) {
681  val--;
682  code = (val >> bit_size) + 1;
683  bits = val & (range - 1);
684  sign = 0;
685  } else {
686  val = -val;
687  val--;
688  code = (val >> bit_size) + 1;
689  bits = val & (range - 1);
690  sign = 1;
691  }
692 
693  assert(code > 0 && code <= 16);
694 
695  put_bits(&s->pb,
698 
699  put_bits(&s->pb, 1, sign);
700  if (bit_size > 0) {
701  put_bits(&s->pb, bit_size, bits);
702  }
703  }
704 }
705 
707 {
708  static int done=0;
709 
711 
712  if(!done){
713  int f_code;
714  int mv;
715  int i;
716 
717  done=1;
720 
721  for(i=0; i<64; i++)
722  {
725  }
726 
728  if(s->intra_vlc_format)
730 
731  /* build unified dc encoding tables */
732  for(i=-255; i<256; i++)
733  {
734  int adiff, index;
735  int bits, code;
736  int diff=i;
737 
738  adiff = FFABS(diff);
739  if(diff<0) diff--;
740  index = av_log2(2*adiff);
741 
743  code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
744  mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
745 
747  code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
748  mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
749  }
750 
751  for(f_code=1; f_code<=MAX_FCODE; f_code++){
752  for(mv=-MAX_MV; mv<=MAX_MV; mv++){
753  int len;
754 
755  if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
756  else{
757  int val, bit_size, code;
758 
759  bit_size = f_code - 1;
760 
761  val=mv;
762  if (val < 0)
763  val = -val;
764  val--;
765  code = (val >> bit_size) + 1;
766  if(code<17){
767  len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
768  }else{
769  len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
770  }
771  }
772 
773  mv_penalty[f_code][mv+MAX_MV]= len;
774  }
775  }
776 
777 
778  for(f_code=MAX_FCODE; f_code>0; f_code--){
779  for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
780  fcode_tab[mv+MAX_MV]= f_code;
781  }
782  }
783  }
785  s->fcode_tab= fcode_tab;
787  s->min_qcoeff=-255;
788  s->max_qcoeff= 255;
789  }else{
790  s->min_qcoeff=-2047;
791  s->max_qcoeff= 2047;
792  }
793  if (s->intra_vlc_format) {
796  } else {
799  }
802 }
803 
804 static inline void encode_dc(MpegEncContext *s, int diff, int component)
805 {
806  if(((unsigned) (diff+255)) >= 511){
807  int index;
808 
809  if(diff<0){
810  index= av_log2_16bit(-2*diff);
811  diff--;
812  }else{
813  index= av_log2_16bit(2*diff);
814  }
815  if (component == 0) {
816  put_bits(
817  &s->pb,
818  ff_mpeg12_vlc_dc_lum_bits[index] + index,
819  (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
820  }else{
821  put_bits(
822  &s->pb,
823  ff_mpeg12_vlc_dc_chroma_bits[index] + index,
824  (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
825  }
826  }else{
827  if (component == 0) {
828  put_bits(
829  &s->pb,
830  mpeg1_lum_dc_uni[diff+255]&0xFF,
831  mpeg1_lum_dc_uni[diff+255]>>8);
832  } else {
833  put_bits(
834  &s->pb,
835  mpeg1_chr_dc_uni[diff+255]&0xFF,
836  mpeg1_chr_dc_uni[diff+255]>>8);
837  }
838  }
839 }
840 
842  DCTELEM *block,
843  int n)
844 {
845  int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
846  int code, component;
847  const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
848 
849  last_index = s->block_last_index[n];
850 
851  /* DC coef */
852  if (s->mb_intra) {
853  component = (n <= 3 ? 0 : (n&1) + 1);
854  dc = block[0]; /* overflow is impossible */
855  diff = dc - s->last_dc[component];
856  encode_dc(s, diff, component);
857  s->last_dc[component] = dc;
858  i = 1;
859  if (s->intra_vlc_format)
860  table_vlc = ff_rl_mpeg2.table_vlc;
861  } else {
862  /* encode the first coefficient : needs to be done here because
863  it is handled slightly differently */
864  level = block[0];
865  if (abs(level) == 1) {
866  code = ((uint32_t)level >> 31); /* the sign bit */
867  put_bits(&s->pb, 2, code | 0x02);
868  i = 1;
869  } else {
870  i = 0;
871  last_non_zero = -1;
872  goto next_coef;
873  }
874  }
875 
876  /* now quantify & encode AC coefs */
877  last_non_zero = i - 1;
878 
879  for(;i<=last_index;i++) {
880  j = s->intra_scantable.permutated[i];
881  level = block[j];
882  next_coef:
883  /* encode using VLC */
884  if (level != 0) {
885  run = i - last_non_zero - 1;
886 
887  alevel= level;
888  MASK_ABS(sign, alevel);
889  sign&=1;
890 
891  if (alevel <= mpeg1_max_level[0][run]){
892  code= mpeg1_index_run[0][run] + alevel - 1;
893  /* store the vlc & sign at once */
894  put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
895  } else {
896  /* escape seems to be pretty rare <5% so I do not optimize it */
897  put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
898  /* escape: only clip in this case */
899  put_bits(&s->pb, 6, run);
901  if (alevel < 128) {
902  put_sbits(&s->pb, 8, level);
903  } else {
904  if (level < 0) {
905  put_bits(&s->pb, 16, 0x8001 + level + 255);
906  } else {
907  put_sbits(&s->pb, 16, level);
908  }
909  }
910  }else{
911  put_sbits(&s->pb, 12, level);
912  }
913  }
914  last_non_zero = i;
915  }
916  }
917  /* end of block */
918  put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
919 }
920 
921 #define OFFSET(x) offsetof(MpegEncContext, x)
922 #define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
923 #define COMMON_OPTS\
924  { "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\
925  { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \
926  { "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
927 
928 static const AVOption mpeg1_options[] = {
931  { NULL },
932 };
933 
934 static const AVOption mpeg2_options[] = {
936  { "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
937  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
939  { NULL },
940 };
941 
942 #define mpeg12_class(x)\
943 static const AVClass mpeg## x ##_class = {\
944  .class_name = "mpeg" #x "video encoder",\
945  .item_name = av_default_item_name,\
946  .option = mpeg## x ##_options,\
947  .version = LIBAVUTIL_VERSION_INT,\
948 };
949 
951 mpeg12_class(2)
952 
953 AVCodec ff_mpeg1video_encoder = {
954  .name = "mpeg1video",
955  .type = AVMEDIA_TYPE_VIDEO,
957  .priv_data_size = sizeof(MpegEncContext),
958  .init = encode_init,
959  .encode2 = ff_MPV_encode_picture,
961  .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
962  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
963  AV_PIX_FMT_NONE },
964  .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
965  .long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
966  .priv_class = &mpeg1_class,
967 };
968 
970  .name = "mpeg2video",
971  .type = AVMEDIA_TYPE_VIDEO,
973  .priv_data_size = sizeof(MpegEncContext),
974  .init = encode_init,
975  .encode2 = ff_MPV_encode_picture,
977  .supported_framerates = ff_mpeg12_frame_rate_tab + 1,
978  .pix_fmts = (const enum AVPixelFormat[]){
980  },
981  .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
982  .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
983  .priv_class = &mpeg2_class,
984 };
static uint8_t uni_mpeg1_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:61
#define MASK_ABS(mask, level)
Definition: mathops.h:148
AVCodec ff_mpeg2video_encoder
Definition: mpeg12enc.c:969
int aspect_ratio_info
Definition: mpegvideo.h:551
int picture_number
Definition: mpegvideo.h:246
struct MpegEncContext MpegEncContext
MpegEncContext.
AVOption.
Definition: opt.h:233
uint8_t * fcode_tab
smallest fcode needed for each MV
Definition: mpegvideo.h:403
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:393
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG1 & B-frame MPEG4
Definition: mpegvideo.h:402
static const uint8_t inv_non_linear_qscale[13]
Definition: mpeg12enc.c:40
static int find_frame_rate_index(MpegEncContext *s)
Definition: mpeg12enc.c:108
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:174
int ff_MPV_encode_end(AVCodecContext *avctx)
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:720
int num
numerator
Definition: rational.h:44
const unsigned char ff_mpeg12_vlc_dc_lum_bits[12]
Definition: mpeg12data.c:55
enum AVCodecID codec_id
Definition: mpegvideo.h:228
void ff_init_rl(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: mpegvideo.c:1250
void avpriv_align_put_bits(PutBitContext *s)
Pad the bitstream with zeros up to the next byte boundary.
Definition: bitstream.c:45
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:1724
int scan_offset
reserve space for SVCD scan offset user data.
Definition: mpegvideo.h:653
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:448
mpegvideo header.
uint8_t permutated[64]
Definition: dsputil.h:183
const uint16_t ff_mpeg12_vlc_dc_lum_code[12]
Definition: mpeg12data.c:52
uint8_t run
Definition: svq3.c:132
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:451
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:456
#define SLICE_MIN_START_CODE
Definition: mpegvideo.h:79
int profile
profile
Definition: avcodec.h:2815
AVCodec.
Definition: avcodec.h:2960
static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
Definition: mpeg12enc.c:71
int qscale
QP.
Definition: mpegvideo.h:343
RLTable.
Definition: rl.h:38
int field_select[2][2]
Definition: mpegvideo.h:401
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y, int mb_block_count)
Definition: mpeg12enc.c:434
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1465
uint8_t bits
Definition: crc.c:31
uint8_t
static uint32_t mpeg1_lum_dc_uni[512]
Definition: mpeg12enc.c:65
#define PICT_FRAME
Definition: mpegvideo.h:629
AVOptions.
static void encode_mb_skip_run(MpegEncContext *s, int run)
Definition: mpeg12enc.c:304
RLTable ff_rl_mpeg2
Definition: mpeg12data.c:174
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
Definition: avcodec.h:1833
const float ff_mpeg1_aspect[16]
Definition: mpeg12data.c:328
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:489
static const AVOption mpeg1_options[]
Definition: mpeg12enc.c:928
int interlaced_dct
Definition: mpegvideo.h:649
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:314
#define CHROMA_420
Definition: mpegvideo.h:641
int intra_dc_precision
Definition: mpegvideo.h:631
int repeat_first_field
Definition: mpegvideo.h:638
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:69
uint8_t(* mv_penalty)[MAX_MV *2+1]
amount of bits needed to encode a MV
Definition: mpegvideo.h:201
static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV *2+1]
Definition: mpeg12enc.c:58
static int8_t mpeg1_max_level[2][64]
Definition: mpeg12enc.c:69
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:45
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:248
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:449
int dquant
qscale difference to prev qscale
Definition: mpegvideo.h:349
int gop_picture_number
index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
Definition: mpegvideo.h:617
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:335
int ff_MPV_encode_init(AVCodecContext *avctx)
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:826
int last_dc[3]
last DC values for MPEG1
Definition: mpegvideo.h:322
static void put_mb_modes(MpegEncContext *s, int n, int bits, int has_mv, int field_motion)
Definition: mpeg12enc.c:423
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:454
int chroma_y_shift
Definition: mpegvideo.h:645
int strict_std_compliance
strictly follow the std (MPEG4, ...)
Definition: mpegvideo.h:236
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
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:804
uint8_t * buf
Definition: put_bits.h:42
int rc_max_rate
maximum bitrate
Definition: avcodec.h:2339
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:136
int low_delay
no reordering needed / has no b-frames
Definition: mpegvideo.h:558
static void mpeg1_encode_sequence_header(MpegEncContext *s)
Definition: mpeg12enc.c:185
static void mpeg1_encode_block(MpegEncContext *s, DCTELEM *block, int component)
Definition: mpeg12enc.c:841
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
Definition: mpeg12enc.c:666
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:70
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
int resync_mb_x
x position of last resync marker
Definition: mpegvideo.h:493
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2317
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:452
#define mpeg12_class(x)
Definition: mpeg12enc.c:942
int intra_vlc_format
Definition: mpegvideo.h:636
int64_t timecode_frame_start
GOP timecode frame start number, in non drop frame format.
Definition: avcodec.h:2463
int progressive_frame
Definition: mpegvideo.h:647
static DCTELEM block[64]
Definition: dct-test.c:169
uint8_t * vbv_delay_ptr
pointer to vbv_delay in the bitstream
Definition: mpegvideo.h:620
const uint16_t(* table_vlc)[2]
Definition: rl.h:41
static uint8_t fcode_tab[MAX_MV *2+1]
Definition: mpeg12enc.c:59
int width
picture width / height.
Definition: avcodec.h:1508
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:318
RLTable ff_rl_mpeg1
Definition: mpeg12data.c:166
int alternate_scan
Definition: mpegvideo.h:637
#define GOP_START_CODE
Definition: mpegvideo.h:77
static uint8_t uni_mpeg2_ac_vlc_len[64 *64 *2]
Definition: mpeg12enc.c:62
void ff_mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
Definition: mpeg12enc.c:659
int level
level
Definition: avcodec.h:2885
#define VE
Definition: mpeg12enc.c:922
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:262
MotionEstContext me
Definition: mpegvideo.h:406
#define EXT_START_CODE
Definition: cavs.h:31
static void put_header(MpegEncContext *s, int header)
Definition: mpeg12enc.c:177
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:100
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
static const int8_t mv[256][2]
Definition: 4xm.c:73
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:390
int frame_pred_frame_dct
Definition: mpegvideo.h:632
NULL
Definition: eval.c:52
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:387
int coded_picture_number
picture number in bitstream order
Definition: avcodec.h:1109
int concealment_motion_vectors
Definition: mpegvideo.h:634
external API header
main external API structure.
Definition: avcodec.h:1339
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:326
ScanTable intra_scantable
Definition: mpegvideo.h:267
#define USER_START_CODE
Definition: cavs.h:32
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:216
MPEG1/2 tables.
uint8_t * inter_ac_vlc_length
Definition: mpegvideo.h:453
static uint8_t mpeg1_index_run[2][64]
Definition: mpeg12enc.c:68
int progressive_sequence
Definition: mpegvideo.h:623
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:1892
int index
Definition: gxfenc.c:72
rational number numerator/denominator
Definition: rational.h:43
#define COMMON_OPTS
Definition: mpeg12enc.c:923
uint8_t * index_run[2]
encoding only
Definition: rl.h:44
#define OFFSET(x)
Definition: mpeg12enc.c:921
#define MAX_MV
Definition: mpegvideo.h:60
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: mpeg12enc.c:334
int f_code
forward MV resolution
Definition: mpegvideo.h:364
#define MAX_FCODE
Definition: mpegvideo.h:59
int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
short DCTELEM
Definition: dsputil.h:39
#define MV_DIR_FORWARD
Definition: mpegvideo.h:386
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:1899
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:350
int bit_rate
wanted bit rate
Definition: mpegvideo.h:219
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:123
int last_mv_dir
last mv_dir, used for b frame encoding
Definition: mpegvideo.h:618
uint8_t level
Definition: svq3.c:133
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:400
static av_cold int encode_init(AVCodecContext *avctx)
Definition: mpeg12enc.c:130
MpegEncContext.
Definition: mpegvideo.h:212
struct AVCodecContext * avctx
Definition: mpegvideo.h:214
PutBitContext pb
bit output
Definition: mpegvideo.h:285
const AVRational ff_mpeg2_aspect[16]
Definition: mpeg12data.c:349
static av_always_inline void put_qscale(MpegEncContext *s)
Definition: mpeg12enc.c:313
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
static uint32_t mpeg1_chr_dc_uni[512]
Definition: mpeg12enc.c:66
static const AVOption mpeg2_options[]
Definition: mpeg12enc.c:934
uint8_t ff_mpeg12_static_rl_table_store[2][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: mpeg12.c:603
Bi-dir predicted.
Definition: avutil.h:247
const uint8_t ff_mpeg12_mbPatTable[64][2]
Definition: mpeg12data.c:221
int den
denominator
Definition: rational.h:45
DSP utils.
void * priv_data
Definition: avcodec.h:1382
void ff_mpeg1_encode_slice_header(MpegEncContext *s)
Definition: mpeg12enc.c:323
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:490
int frame_rate_index
Definition: mpegvideo.h:354
void ff_mpeg12_common_init(MpegEncContext *s)
Definition: mpeg12.c:649
int picture_structure
Definition: mpegvideo.h:625
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: avcodec.h:1239
int len
#define av_log2_16bit
Definition: intmath.h:86
#define SEQ_START_CODE
Definition: mpegvideo.h:76
int drop_frame_timecode
timecode is in drop frame format.
Definition: mpegvideo.h:652
#define av_log2
Definition: intmath.h:85
int resync_mb_y
y position of last resync marker
Definition: mpegvideo.h:494
static const uint8_t svcd_scan_offset_placeholder[14]
Definition: mpeg12enc.c:45
const uint8_t ff_mpeg12_mbAddrIncrTable[36][2]
Definition: mpeg12data.c:182
int key_frame
1 -> keyframe, 0-> not
Definition: avcodec.h:1058
void ff_mpeg1_encode_init(MpegEncContext *s)
Definition: mpeg12enc.c:706
struct AVFrame f
Definition: mpegvideo.h:96
int flags
AVCodecContext.flags (HQ, MV4, ...)
Definition: mpegvideo.h:231
const uint8_t ff_mpeg12_mbMotionVectorTable[17][2]
Definition: mpeg12data.c:288
#define PICTURE_START_CODE
Definition: mpegvideo.h:78
int b_code
backward MV resolution for B Frames (mpeg4)
Definition: mpegvideo.h:365
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
const AVRational ff_mpeg12_frame_rate_tab[16]
Definition: mpeg12data.c:308
int strict_std_compliance
strictly follow the standard (MPEG4, ...).
Definition: avcodec.h:2547
Predicted.
Definition: avutil.h:246
if(!(ptr_align%ac->ptr_align)&&samples_align >=aligned_len)