Libav
mpeg4videoenc.c
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1 /*
2  * MPEG4 encoder.
3  * Copyright (c) 2000,2001 Fabrice Bellard
4  * Copyright (c) 2002-2010 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 
23 #include "libavutil/attributes.h"
24 #include "libavutil/log.h"
25 #include "libavutil/opt.h"
26 #include "mpegvideo.h"
27 #include "h263.h"
28 #include "mpeg4video.h"
29 
30 /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
31  * differences in mpeg4. Unified in the sense that the specification specifies
32  * this encoding in several steps. */
35 static uint16_t uni_DCtab_lum_bits[512];
36 static uint16_t uni_DCtab_chrom_bits[512];
37 
38 /* Unified encoding tables for run length encoding of coefficients.
39  * Unified in the sense that the specification specifies the encoding in several steps. */
40 static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
41 static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
42 static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
43 static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
44 
45 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
46 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
47 #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
48 
49 /* mpeg4
50  * inter
51  * max level: 24/6
52  * max run: 53/63
53  *
54  * intra
55  * max level: 53/16
56  * max run: 29/41
57  */
58 
63 static inline int get_block_rate(MpegEncContext *s, int16_t block[64],
64  int block_last_index, uint8_t scantable[64])
65 {
66  int last = 0;
67  int j;
68  int rate = 0;
69 
70  for (j = 1; j <= block_last_index; j++) {
71  const int index = scantable[j];
72  int level = block[index];
73  if (level) {
74  level += 64;
75  if ((level & (~127)) == 0) {
76  if (j < block_last_index)
77  rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
78  else
79  rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
80  } else
81  rate += s->ac_esc_length;
82 
83  last = j;
84  }
85  }
86 
87  return rate;
88 }
89 
98 static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64],
99  const int dir[6], uint8_t *st[6],
100  const int zigzag_last_index[6])
101 {
102  int i, n;
103  memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6);
104 
105  for (n = 0; n < 6; n++) {
106  int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
107 
108  st[n] = s->intra_scantable.permutated;
109  if (dir[n]) {
110  /* top prediction */
111  for (i = 1; i < 8; i++)
112  block[n][s->dsp.idct_permutation[i]] = ac_val[i + 8];
113  } else {
114  /* left prediction */
115  for (i = 1; i < 8; i++)
116  block[n][s->dsp.idct_permutation[i << 3]] = ac_val[i];
117  }
118  }
119 }
120 
129 static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64],
130  const int dir[6], uint8_t *st[6],
131  int zigzag_last_index[6])
132 {
133  int score = 0;
134  int i, n;
135  int8_t *const qscale_table = s->current_picture.qscale_table;
136 
137  memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6);
138 
139  for (n = 0; n < 6; n++) {
140  int16_t *ac_val, *ac_val1;
141 
142  score -= get_block_rate(s, block[n], s->block_last_index[n],
144 
145  ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
146  ac_val1 = ac_val;
147  if (dir[n]) {
148  const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
149  /* top prediction */
150  ac_val -= s->block_wrap[n] * 16;
151  if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) {
152  /* same qscale */
153  for (i = 1; i < 8; i++) {
154  const int level = block[n][s->dsp.idct_permutation[i]];
155  block[n][s->dsp.idct_permutation[i]] = level - ac_val[i + 8];
156  ac_val1[i] = block[n][s->dsp.idct_permutation[i << 3]];
157  ac_val1[i + 8] = level;
158  }
159  } else {
160  /* different qscale, we must rescale */
161  for (i = 1; i < 8; i++) {
162  const int level = block[n][s->dsp.idct_permutation[i]];
163  block[n][s->dsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
164  ac_val1[i] = block[n][s->dsp.idct_permutation[i << 3]];
165  ac_val1[i + 8] = level;
166  }
167  }
168  st[n] = s->intra_h_scantable.permutated;
169  } else {
170  const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
171  /* left prediction */
172  ac_val -= 16;
173  if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) {
174  /* same qscale */
175  for (i = 1; i < 8; i++) {
176  const int level = block[n][s->dsp.idct_permutation[i << 3]];
177  block[n][s->dsp.idct_permutation[i << 3]] = level - ac_val[i];
178  ac_val1[i] = level;
179  ac_val1[i + 8] = block[n][s->dsp.idct_permutation[i]];
180  }
181  } else {
182  /* different qscale, we must rescale */
183  for (i = 1; i < 8; i++) {
184  const int level = block[n][s->dsp.idct_permutation[i << 3]];
185  block[n][s->dsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
186  ac_val1[i] = level;
187  ac_val1[i + 8] = block[n][s->dsp.idct_permutation[i]];
188  }
189  }
190  st[n] = s->intra_v_scantable.permutated;
191  }
192 
193  for (i = 63; i > 0; i--) // FIXME optimize
194  if (block[n][st[n][i]])
195  break;
196  s->block_last_index[n] = i;
197 
198  score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
199  }
200 
201  if (score < 0) {
202  return 1;
203  } else {
204  restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
205  return 0;
206  }
207 }
208 
213 {
214  int i;
215  int8_t *const qscale_table = s->current_picture.qscale_table;
216 
218 
219  if (s->pict_type == AV_PICTURE_TYPE_B) {
220  int odd = 0;
221  /* ok, come on, this isn't funny anymore, there's more code for
222  * handling this mpeg4 mess than for the actual adaptive quantization */
223 
224  for (i = 0; i < s->mb_num; i++) {
225  int mb_xy = s->mb_index2xy[i];
226  odd += qscale_table[mb_xy] & 1;
227  }
228 
229  if (2 * odd > s->mb_num)
230  odd = 1;
231  else
232  odd = 0;
233 
234  for (i = 0; i < s->mb_num; i++) {
235  int mb_xy = s->mb_index2xy[i];
236  if ((qscale_table[mb_xy] & 1) != odd)
237  qscale_table[mb_xy]++;
238  if (qscale_table[mb_xy] > 31)
239  qscale_table[mb_xy] = 31;
240  }
241 
242  for (i = 1; i < s->mb_num; i++) {
243  int mb_xy = s->mb_index2xy[i];
244  if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] &&
245  (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
246  s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
247  }
248  }
249  }
250 }
251 
256 static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
257 {
258 #if 1
259  /* DC will overflow if level is outside the [-255,255] range. */
260  level += 256;
261  if (n < 4) {
262  /* luminance */
263  put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]);
264  } else {
265  /* chrominance */
267  }
268 #else
269  int size, v;
270  /* find number of bits */
271  size = 0;
272  v = abs(level);
273  while (v) {
274  v >>= 1;
275  size++;
276  }
277 
278  if (n < 4) {
279  /* luminance */
280  put_bits(&s->pb, ff_mpeg4_DCtab_lum[size][1], ff_mpeg4_DCtab_lum[size][0]);
281  } else {
282  /* chrominance */
283  put_bits(&s->pb, ff_mpeg4_DCtab_chrom[size][1], ff_mpeg4_DCtab_chrom[size][0]);
284  }
285 
286  /* encode remaining bits */
287  if (size > 0) {
288  if (level < 0)
289  level = (-level) ^ ((1 << size) - 1);
290  put_bits(&s->pb, size, level);
291  if (size > 8)
292  put_bits(&s->pb, 1, 1);
293  }
294 #endif
295 }
296 
297 static inline int mpeg4_get_dc_length(int level, int n)
298 {
299  if (n < 4)
300  return uni_DCtab_lum_len[level + 256];
301  else
302  return uni_DCtab_chrom_len[level + 256];
303 }
304 
309 static inline void mpeg4_encode_block(MpegEncContext *s,
310  int16_t *block, int n, int intra_dc,
311  uint8_t *scan_table, PutBitContext *dc_pb,
312  PutBitContext *ac_pb)
313 {
314  int i, last_non_zero;
315  uint32_t *bits_tab;
316  uint8_t *len_tab;
317  const int last_index = s->block_last_index[n];
318 
319  if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
320  /* mpeg4 based DC predictor */
321  mpeg4_encode_dc(dc_pb, intra_dc, n);
322  if (last_index < 1)
323  return;
324  i = 1;
325  bits_tab = uni_mpeg4_intra_rl_bits;
326  len_tab = uni_mpeg4_intra_rl_len;
327  } else {
328  if (last_index < 0)
329  return;
330  i = 0;
331  bits_tab = uni_mpeg4_inter_rl_bits;
332  len_tab = uni_mpeg4_inter_rl_len;
333  }
334 
335  /* AC coefs */
336  last_non_zero = i - 1;
337  for (; i < last_index; i++) {
338  int level = block[scan_table[i]];
339  if (level) {
340  int run = i - last_non_zero - 1;
341  level += 64;
342  if ((level & (~127)) == 0) {
343  const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
344  put_bits(ac_pb, len_tab[index], bits_tab[index]);
345  } else { // ESC3
346  put_bits(ac_pb,
347  7 + 2 + 1 + 6 + 1 + 12 + 1,
348  (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
349  (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
350  }
351  last_non_zero = i;
352  }
353  }
354  /* if (i <= last_index) */ {
355  int level = block[scan_table[i]];
356  int run = i - last_non_zero - 1;
357  level += 64;
358  if ((level & (~127)) == 0) {
359  const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
360  put_bits(ac_pb, len_tab[index], bits_tab[index]);
361  } else { // ESC3
362  put_bits(ac_pb,
363  7 + 2 + 1 + 6 + 1 + 12 + 1,
364  (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
365  (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
366  }
367  }
368 }
369 
371  int16_t *block, int n,
372  int intra_dc, uint8_t *scan_table)
373 {
374  int i, last_non_zero;
375  uint8_t *len_tab;
376  const int last_index = s->block_last_index[n];
377  int len = 0;
378 
379  if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
380  /* mpeg4 based DC predictor */
381  len += mpeg4_get_dc_length(intra_dc, n);
382  if (last_index < 1)
383  return len;
384  i = 1;
385  len_tab = uni_mpeg4_intra_rl_len;
386  } else {
387  if (last_index < 0)
388  return 0;
389  i = 0;
390  len_tab = uni_mpeg4_inter_rl_len;
391  }
392 
393  /* AC coefs */
394  last_non_zero = i - 1;
395  for (; i < last_index; i++) {
396  int level = block[scan_table[i]];
397  if (level) {
398  int run = i - last_non_zero - 1;
399  level += 64;
400  if ((level & (~127)) == 0) {
401  const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
402  len += len_tab[index];
403  } else { // ESC3
404  len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
405  }
406  last_non_zero = i;
407  }
408  }
409  /* if (i <= last_index) */ {
410  int level = block[scan_table[i]];
411  int run = i - last_non_zero - 1;
412  level += 64;
413  if ((level & (~127)) == 0) {
414  const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
415  len += len_tab[index];
416  } else { // ESC3
417  len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
418  }
419  }
420 
421  return len;
422 }
423 
424 static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
425  int intra_dc[6], uint8_t **scan_table,
426  PutBitContext *dc_pb,
427  PutBitContext *ac_pb)
428 {
429  int i;
430 
431  if (scan_table) {
432  if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
433  for (i = 0; i < 6; i++)
434  skip_put_bits(&s->pb,
435  mpeg4_get_block_length(s, block[i], i,
436  intra_dc[i], scan_table[i]));
437  } else {
438  /* encode each block */
439  for (i = 0; i < 6; i++)
440  mpeg4_encode_block(s, block[i], i,
441  intra_dc[i], scan_table[i], dc_pb, ac_pb);
442  }
443  } else {
444  if (s->flags2 & CODEC_FLAG2_NO_OUTPUT) {
445  for (i = 0; i < 6; i++)
446  skip_put_bits(&s->pb,
447  mpeg4_get_block_length(s, block[i], i, 0,
449  } else {
450  /* encode each block */
451  for (i = 0; i < 6; i++)
452  mpeg4_encode_block(s, block[i], i, 0,
453  s->intra_scantable.permutated, dc_pb, ac_pb);
454  }
455  }
456 }
457 
458 static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64],
459  int motion_x, int motion_y, int mb_type)
460 {
461  int cbp = 0, i;
462 
463  if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
464  int score = 0;
465  const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
466 
467  for (i = 0; i < 6; i++) {
468  if (s->coded_score[i] < 0) {
469  score += s->coded_score[i];
470  cbp |= 1 << (5 - i);
471  }
472  }
473 
474  if (cbp) {
475  int zero_score = -6;
476  if ((motion_x | motion_y | s->dquant | mb_type) == 0)
477  zero_score -= 4; // 2 * MV + mb_type + cbp bit
478 
479  zero_score *= lambda;
480  if (zero_score <= score)
481  cbp = 0;
482  }
483 
484  for (i = 0; i < 6; i++) {
485  if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
486  s->block_last_index[i] = -1;
487  s->dsp.clear_block(s->block[i]);
488  }
489  }
490  } else {
491  for (i = 0; i < 6; i++) {
492  if (s->block_last_index[i] >= 0)
493  cbp |= 1 << (5 - i);
494  }
495  }
496  return cbp;
497 }
498 
499 // FIXME this is duplicated to h263.c
500 static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
501 
502 void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
503  int motion_x, int motion_y)
504 {
505  int cbpc, cbpy, pred_x, pred_y;
506  PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
507  PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
508  PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
509  const int interleaved_stats = (s->flags & CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
510 
511  if (!s->mb_intra) {
512  int i, cbp;
513 
514  if (s->pict_type == AV_PICTURE_TYPE_B) {
515  /* convert from mv_dir to type */
516  static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
517  int mb_type = mb_type_table[s->mv_dir];
518 
519  if (s->mb_x == 0) {
520  for (i = 0; i < 2; i++)
521  s->last_mv[i][0][0] =
522  s->last_mv[i][0][1] =
523  s->last_mv[i][1][0] =
524  s->last_mv[i][1][1] = 0;
525  }
526 
527  assert(s->dquant >= -2 && s->dquant <= 2);
528  assert((s->dquant & 1) == 0);
529  assert(mb_type >= 0);
530 
531  /* nothing to do if this MB was skipped in the next P Frame */
532  if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ...
533  s->skip_count++;
534  s->mv[0][0][0] =
535  s->mv[0][0][1] =
536  s->mv[1][0][0] =
537  s->mv[1][0][1] = 0;
538  s->mv_dir = MV_DIR_FORWARD; // doesn't matter
539  s->qscale -= s->dquant;
540 // s->mb_skipped = 1;
541 
542  return;
543  }
544 
545  cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
546 
547  if ((cbp | motion_x | motion_y | mb_type) == 0) {
548  /* direct MB with MV={0,0} */
549  assert(s->dquant == 0);
550 
551  put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
552 
553  if (interleaved_stats) {
554  s->misc_bits++;
555  s->last_bits++;
556  }
557  s->skip_count++;
558  return;
559  }
560 
561  put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
562  put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge
563  put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :)
564  if (cbp)
565  put_bits(&s->pb, 6, cbp);
566 
567  if (cbp && mb_type) {
568  if (s->dquant)
569  put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
570  else
571  put_bits(&s->pb, 1, 0);
572  } else
573  s->qscale -= s->dquant;
574 
575  if (!s->progressive_sequence) {
576  if (cbp)
577  put_bits(&s->pb, 1, s->interlaced_dct);
578  if (mb_type) // not direct mode
579  put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
580  }
581 
582  if (interleaved_stats)
583  s->misc_bits += get_bits_diff(s);
584 
585  if (!mb_type) {
586  assert(s->mv_dir & MV_DIRECT);
587  ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
588  s->b_count++;
589  s->f_count++;
590  } else {
591  assert(mb_type > 0 && mb_type < 4);
592  if (s->mv_type != MV_TYPE_FIELD) {
593  if (s->mv_dir & MV_DIR_FORWARD) {
595  s->mv[0][0][0] - s->last_mv[0][0][0],
596  s->mv[0][0][1] - s->last_mv[0][0][1],
597  s->f_code);
598  s->last_mv[0][0][0] =
599  s->last_mv[0][1][0] = s->mv[0][0][0];
600  s->last_mv[0][0][1] =
601  s->last_mv[0][1][1] = s->mv[0][0][1];
602  s->f_count++;
603  }
604  if (s->mv_dir & MV_DIR_BACKWARD) {
606  s->mv[1][0][0] - s->last_mv[1][0][0],
607  s->mv[1][0][1] - s->last_mv[1][0][1],
608  s->b_code);
609  s->last_mv[1][0][0] =
610  s->last_mv[1][1][0] = s->mv[1][0][0];
611  s->last_mv[1][0][1] =
612  s->last_mv[1][1][1] = s->mv[1][0][1];
613  s->b_count++;
614  }
615  } else {
616  if (s->mv_dir & MV_DIR_FORWARD) {
617  put_bits(&s->pb, 1, s->field_select[0][0]);
618  put_bits(&s->pb, 1, s->field_select[0][1]);
619  }
620  if (s->mv_dir & MV_DIR_BACKWARD) {
621  put_bits(&s->pb, 1, s->field_select[1][0]);
622  put_bits(&s->pb, 1, s->field_select[1][1]);
623  }
624  if (s->mv_dir & MV_DIR_FORWARD) {
625  for (i = 0; i < 2; i++) {
627  s->mv[0][i][0] - s->last_mv[0][i][0],
628  s->mv[0][i][1] - s->last_mv[0][i][1] / 2,
629  s->f_code);
630  s->last_mv[0][i][0] = s->mv[0][i][0];
631  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
632  }
633  s->f_count++;
634  }
635  if (s->mv_dir & MV_DIR_BACKWARD) {
636  for (i = 0; i < 2; i++) {
638  s->mv[1][i][0] - s->last_mv[1][i][0],
639  s->mv[1][i][1] - s->last_mv[1][i][1] / 2,
640  s->b_code);
641  s->last_mv[1][i][0] = s->mv[1][i][0];
642  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
643  }
644  s->b_count++;
645  }
646  }
647  }
648 
649  if (interleaved_stats)
650  s->mv_bits += get_bits_diff(s);
651 
652  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
653 
654  if (interleaved_stats)
655  s->p_tex_bits += get_bits_diff(s);
656  } else { /* s->pict_type==AV_PICTURE_TYPE_B */
657  cbp = get_p_cbp(s, block, motion_x, motion_y);
658 
659  if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
660  s->mv_type == MV_TYPE_16X16) {
661  /* check if the B frames can skip it too, as we must skip it
662  * if we skip here why didn't they just compress
663  * the skip-mb bits instead of reusing them ?! */
664  if (s->max_b_frames > 0) {
665  int i;
666  int x, y, offset;
667  uint8_t *p_pic;
668 
669  x = s->mb_x * 16;
670  y = s->mb_y * 16;
671  if (x + 16 > s->width)
672  x = s->width - 16;
673  if (y + 16 > s->height)
674  y = s->height - 16;
675 
676  offset = x + y * s->linesize;
677  p_pic = s->new_picture.f.data[0] + offset;
678 
679  s->mb_skipped = 1;
680  for (i = 0; i < s->max_b_frames; i++) {
681  uint8_t *b_pic;
682  int diff;
683  Picture *pic = s->reordered_input_picture[i + 1];
684 
685  if (!pic || pic->f.pict_type != AV_PICTURE_TYPE_B)
686  break;
687 
688  b_pic = pic->f.data[0] + offset;
689  if (!pic->shared)
690  b_pic += INPLACE_OFFSET;
691  diff = s->dsp.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
692  if (diff > s->qscale * 70) { // FIXME check that 70 is optimal
693  s->mb_skipped = 0;
694  break;
695  }
696  }
697  } else
698  s->mb_skipped = 1;
699 
700  if (s->mb_skipped == 1) {
701  /* skip macroblock */
702  put_bits(&s->pb, 1, 1);
703 
704  if (interleaved_stats) {
705  s->misc_bits++;
706  s->last_bits++;
707  }
708  s->skip_count++;
709 
710  return;
711  }
712  }
713 
714  put_bits(&s->pb, 1, 0); /* mb coded */
715  cbpc = cbp & 3;
716  cbpy = cbp >> 2;
717  cbpy ^= 0xf;
718  if (s->mv_type == MV_TYPE_16X16) {
719  if (s->dquant)
720  cbpc += 8;
721  put_bits(&s->pb,
724 
725  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
726  if (s->dquant)
727  put_bits(pb2, 2, dquant_code[s->dquant + 2]);
728 
729  if (!s->progressive_sequence) {
730  if (cbp)
731  put_bits(pb2, 1, s->interlaced_dct);
732  put_bits(pb2, 1, 0);
733  }
734 
735  if (interleaved_stats)
736  s->misc_bits += get_bits_diff(s);
737 
738  /* motion vectors: 16x16 mode */
739  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
740 
742  motion_x - pred_x,
743  motion_y - pred_y,
744  s->f_code);
745  } else if (s->mv_type == MV_TYPE_FIELD) {
746  if (s->dquant)
747  cbpc += 8;
748  put_bits(&s->pb,
751 
752  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
753  if (s->dquant)
754  put_bits(pb2, 2, dquant_code[s->dquant + 2]);
755 
756  assert(!s->progressive_sequence);
757  if (cbp)
758  put_bits(pb2, 1, s->interlaced_dct);
759  put_bits(pb2, 1, 1);
760 
761  if (interleaved_stats)
762  s->misc_bits += get_bits_diff(s);
763 
764  /* motion vectors: 16x8 interlaced mode */
765  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
766  pred_y /= 2;
767 
768  put_bits(&s->pb, 1, s->field_select[0][0]);
769  put_bits(&s->pb, 1, s->field_select[0][1]);
770 
772  s->mv[0][0][0] - pred_x,
773  s->mv[0][0][1] - pred_y,
774  s->f_code);
776  s->mv[0][1][0] - pred_x,
777  s->mv[0][1][1] - pred_y,
778  s->f_code);
779  } else {
780  assert(s->mv_type == MV_TYPE_8X8);
781  put_bits(&s->pb,
782  ff_h263_inter_MCBPC_bits[cbpc + 16],
783  ff_h263_inter_MCBPC_code[cbpc + 16]);
784  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
785 
786  if (!s->progressive_sequence && cbp)
787  put_bits(pb2, 1, s->interlaced_dct);
788 
789  if (interleaved_stats)
790  s->misc_bits += get_bits_diff(s);
791 
792  for (i = 0; i < 4; i++) {
793  /* motion vectors: 8x8 mode*/
794  ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
795 
797  s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x,
798  s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y,
799  s->f_code);
800  }
801  }
802 
803  if (interleaved_stats)
804  s->mv_bits += get_bits_diff(s);
805 
806  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
807 
808  if (interleaved_stats)
809  s->p_tex_bits += get_bits_diff(s);
810 
811  s->f_count++;
812  }
813  } else {
814  int cbp;
815  int dc_diff[6]; // dc values with the dc prediction subtracted
816  int dir[6]; // prediction direction
817  int zigzag_last_index[6];
818  uint8_t *scan_table[6];
819  int i;
820 
821  for (i = 0; i < 6; i++)
822  dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
823 
824  if (s->flags & CODEC_FLAG_AC_PRED) {
825  s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
826  } else {
827  for (i = 0; i < 6; i++)
828  scan_table[i] = s->intra_scantable.permutated;
829  }
830 
831  /* compute cbp */
832  cbp = 0;
833  for (i = 0; i < 6; i++)
834  if (s->block_last_index[i] >= 1)
835  cbp |= 1 << (5 - i);
836 
837  cbpc = cbp & 3;
838  if (s->pict_type == AV_PICTURE_TYPE_I) {
839  if (s->dquant)
840  cbpc += 4;
841  put_bits(&s->pb,
844  } else {
845  if (s->dquant)
846  cbpc += 8;
847  put_bits(&s->pb, 1, 0); /* mb coded */
848  put_bits(&s->pb,
849  ff_h263_inter_MCBPC_bits[cbpc + 4],
850  ff_h263_inter_MCBPC_code[cbpc + 4]);
851  }
852  put_bits(pb2, 1, s->ac_pred);
853  cbpy = cbp >> 2;
854  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
855  if (s->dquant)
856  put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
857 
858  if (!s->progressive_sequence)
859  put_bits(dc_pb, 1, s->interlaced_dct);
860 
861  if (interleaved_stats)
862  s->misc_bits += get_bits_diff(s);
863 
864  mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
865 
866  if (interleaved_stats)
867  s->i_tex_bits += get_bits_diff(s);
868  s->i_count++;
869 
870  /* restore ac coeffs & last_index stuff
871  * if we messed them up with the prediction */
872  if (s->ac_pred)
873  restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
874  }
875 }
876 
881 {
882  int length;
883  put_bits(pbc, 1, 0);
884  length = (-put_bits_count(pbc)) & 7;
885  if (length)
886  put_bits(pbc, length, (1 << length) - 1);
887 }
888 
889 /* must be called before writing the header */
891 {
892  if (s->pict_type == AV_PICTURE_TYPE_B) {
894  } else {
895  s->last_time_base = s->time_base;
896  s->time_base = s->time / s->avctx->time_base.den;
897  }
898 }
899 
901 {
902  int hours, minutes, seconds;
903  int64_t time;
904 
905  put_bits(&s->pb, 16, 0);
906  put_bits(&s->pb, 16, GOP_STARTCODE);
907 
908  time = s->current_picture_ptr->f.pts;
909  if (s->reordered_input_picture[1])
910  time = FFMIN(time, s->reordered_input_picture[1]->f.pts);
911  time = time * s->avctx->time_base.num;
912 
913  seconds = time / s->avctx->time_base.den;
914  minutes = seconds / 60;
915  seconds %= 60;
916  hours = minutes / 60;
917  minutes %= 60;
918  hours %= 24;
919 
920  put_bits(&s->pb, 5, hours);
921  put_bits(&s->pb, 6, minutes);
922  put_bits(&s->pb, 1, 1);
923  put_bits(&s->pb, 6, seconds);
924 
925  put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
926  put_bits(&s->pb, 1, 0); // broken link == NO
927 
928  s->last_time_base = time / s->avctx->time_base.den;
929 
930  ff_mpeg4_stuffing(&s->pb);
931 }
932 
934 {
935  int profile_and_level_indication;
936  int vo_ver_id;
937 
938  if (s->avctx->profile != FF_PROFILE_UNKNOWN) {
939  profile_and_level_indication = s->avctx->profile << 4;
940  } else if (s->max_b_frames || s->quarter_sample) {
941  profile_and_level_indication = 0xF0; // adv simple
942  } else {
943  profile_and_level_indication = 0x00; // simple
944  }
945 
946  if (s->avctx->level != FF_LEVEL_UNKNOWN)
947  profile_and_level_indication |= s->avctx->level;
948  else
949  profile_and_level_indication |= 1; // level 1
950 
951  if (profile_and_level_indication >> 4 == 0xF)
952  vo_ver_id = 5;
953  else
954  vo_ver_id = 1;
955 
956  // FIXME levels
957 
958  put_bits(&s->pb, 16, 0);
959  put_bits(&s->pb, 16, VOS_STARTCODE);
960 
961  put_bits(&s->pb, 8, profile_and_level_indication);
962 
963  put_bits(&s->pb, 16, 0);
964  put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
965 
966  put_bits(&s->pb, 1, 1);
967  put_bits(&s->pb, 4, vo_ver_id);
968  put_bits(&s->pb, 3, 1); // priority
969 
970  put_bits(&s->pb, 4, 1); // visual obj type== video obj
971 
972  put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME
973 
974  ff_mpeg4_stuffing(&s->pb);
975 }
976 
978  int vo_number,
979  int vol_number)
980 {
981  int vo_ver_id;
982 
984  return;
985 
986  if (s->max_b_frames || s->quarter_sample) {
987  vo_ver_id = 5;
989  } else {
990  vo_ver_id = 1;
991  s->vo_type = SIMPLE_VO_TYPE;
992  }
993 
994  put_bits(&s->pb, 16, 0);
995  put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
996  put_bits(&s->pb, 16, 0);
997  put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
998 
999  put_bits(&s->pb, 1, 0); /* random access vol */
1000  put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
1001  if (s->workaround_bugs & FF_BUG_MS) {
1002  put_bits(&s->pb, 1, 0); /* is obj layer id= no */
1003  } else {
1004  put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
1005  put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
1006  put_bits(&s->pb, 3, 1); /* is obj layer priority */
1007  }
1008 
1010 
1011  put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */
1013  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
1014  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
1015  }
1016 
1017  if (s->workaround_bugs & FF_BUG_MS) {
1018  put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
1019  } else {
1020  put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
1021  put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
1022  put_bits(&s->pb, 1, s->low_delay);
1023  put_bits(&s->pb, 1, 0); /* vbv parameters= no */
1024  }
1025 
1026  put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
1027  put_bits(&s->pb, 1, 1); /* marker bit */
1028 
1029  put_bits(&s->pb, 16, s->avctx->time_base.den);
1030  if (s->time_increment_bits < 1)
1031  s->time_increment_bits = 1;
1032  put_bits(&s->pb, 1, 1); /* marker bit */
1033  put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
1034  put_bits(&s->pb, 1, 1); /* marker bit */
1035  put_bits(&s->pb, 13, s->width); /* vol width */
1036  put_bits(&s->pb, 1, 1); /* marker bit */
1037  put_bits(&s->pb, 13, s->height); /* vol height */
1038  put_bits(&s->pb, 1, 1); /* marker bit */
1039  put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1040  put_bits(&s->pb, 1, 1); /* obmc disable */
1041  if (vo_ver_id == 1)
1042  put_bits(&s->pb, 1, 0); /* sprite enable */
1043  else
1044  put_bits(&s->pb, 2, 0); /* sprite enable */
1045 
1046  put_bits(&s->pb, 1, 0); /* not 8 bit == false */
1047  put_bits(&s->pb, 1, s->mpeg_quant); /* quant type= (0=h263 style)*/
1048 
1049  if (s->mpeg_quant) {
1052  }
1053 
1054  if (vo_ver_id != 1)
1055  put_bits(&s->pb, 1, s->quarter_sample);
1056  put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1057  put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
1058  put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1059  if (s->data_partitioning)
1060  put_bits(&s->pb, 1, 0); /* no rvlc */
1061 
1062  if (vo_ver_id != 1) {
1063  put_bits(&s->pb, 1, 0); /* newpred */
1064  put_bits(&s->pb, 1, 0); /* reduced res vop */
1065  }
1066  put_bits(&s->pb, 1, 0); /* scalability */
1067 
1068  ff_mpeg4_stuffing(&s->pb);
1069 
1070  /* user data */
1071  if (!(s->flags & CODEC_FLAG_BITEXACT)) {
1072  put_bits(&s->pb, 16, 0);
1073  put_bits(&s->pb, 16, 0x1B2); /* user_data */
1075  }
1076 }
1077 
1078 /* write mpeg4 VOP header */
1080 {
1081  int time_incr;
1082  int time_div, time_mod;
1083 
1084  if (s->pict_type == AV_PICTURE_TYPE_I) {
1085  if (!(s->flags & CODEC_FLAG_GLOBAL_HEADER)) {
1086  if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
1088  if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy
1089  mpeg4_encode_vol_header(s, 0, 0);
1090  }
1091  if (!(s->workaround_bugs & FF_BUG_MS))
1093  }
1094 
1096 
1097  put_bits(&s->pb, 16, 0); /* vop header */
1098  put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1099  put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1100 
1101  assert(s->time >= 0);
1102  time_div = s->time / s->avctx->time_base.den;
1103  time_mod = s->time % s->avctx->time_base.den;
1104  time_incr = time_div - s->last_time_base;
1105  assert(time_incr >= 0);
1106  while (time_incr--)
1107  put_bits(&s->pb, 1, 1);
1108 
1109  put_bits(&s->pb, 1, 0);
1110 
1111  put_bits(&s->pb, 1, 1); /* marker */
1112  put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1113  put_bits(&s->pb, 1, 1); /* marker */
1114  put_bits(&s->pb, 1, 1); /* vop coded */
1115  if (s->pict_type == AV_PICTURE_TYPE_P) {
1116  put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1117  }
1118  put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1119  if (!s->progressive_sequence) {
1121  put_bits(&s->pb, 1, s->alternate_scan);
1122  }
1123  // FIXME sprite stuff
1124 
1125  put_bits(&s->pb, 5, s->qscale);
1126 
1127  if (s->pict_type != AV_PICTURE_TYPE_I)
1128  put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1129  if (s->pict_type == AV_PICTURE_TYPE_B)
1130  put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1131 }
1132 
1133 static av_cold void init_uni_dc_tab(void)
1134 {
1135  int level, uni_code, uni_len;
1136 
1137  for (level = -256; level < 256; level++) {
1138  int size, v, l;
1139  /* find number of bits */
1140  size = 0;
1141  v = abs(level);
1142  while (v) {
1143  v >>= 1;
1144  size++;
1145  }
1146 
1147  if (level < 0)
1148  l = (-level) ^ ((1 << size) - 1);
1149  else
1150  l = level;
1151 
1152  /* luminance */
1153  uni_code = ff_mpeg4_DCtab_lum[size][0];
1154  uni_len = ff_mpeg4_DCtab_lum[size][1];
1155 
1156  if (size > 0) {
1157  uni_code <<= size;
1158  uni_code |= l;
1159  uni_len += size;
1160  if (size > 8) {
1161  uni_code <<= 1;
1162  uni_code |= 1;
1163  uni_len++;
1164  }
1165  }
1166  uni_DCtab_lum_bits[level + 256] = uni_code;
1167  uni_DCtab_lum_len[level + 256] = uni_len;
1168 
1169  /* chrominance */
1170  uni_code = ff_mpeg4_DCtab_chrom[size][0];
1171  uni_len = ff_mpeg4_DCtab_chrom[size][1];
1172 
1173  if (size > 0) {
1174  uni_code <<= size;
1175  uni_code |= l;
1176  uni_len += size;
1177  if (size > 8) {
1178  uni_code <<= 1;
1179  uni_code |= 1;
1180  uni_len++;
1181  }
1182  }
1183  uni_DCtab_chrom_bits[level + 256] = uni_code;
1184  uni_DCtab_chrom_len[level + 256] = uni_len;
1185  }
1186 }
1187 
1188 static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1189  uint8_t *len_tab)
1190 {
1191  int slevel, run, last;
1192 
1193  assert(MAX_LEVEL >= 64);
1194  assert(MAX_RUN >= 63);
1195 
1196  for (slevel = -64; slevel < 64; slevel++) {
1197  if (slevel == 0)
1198  continue;
1199  for (run = 0; run < 64; run++) {
1200  for (last = 0; last <= 1; last++) {
1201  const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64);
1202  int level = slevel < 0 ? -slevel : slevel;
1203  int sign = slevel < 0 ? 1 : 0;
1204  int bits, len, code;
1205  int level1, run1;
1206 
1207  len_tab[index] = 100;
1208 
1209  /* ESC0 */
1210  code = get_rl_index(rl, last, run, level);
1211  bits = rl->table_vlc[code][0];
1212  len = rl->table_vlc[code][1];
1213  bits = bits * 2 + sign;
1214  len++;
1215 
1216  if (code != rl->n && len < len_tab[index]) {
1217  bits_tab[index] = bits;
1218  len_tab[index] = len;
1219  }
1220  /* ESC1 */
1221  bits = rl->table_vlc[rl->n][0];
1222  len = rl->table_vlc[rl->n][1];
1223  bits = bits * 2;
1224  len++; // esc1
1225  level1 = level - rl->max_level[last][run];
1226  if (level1 > 0) {
1227  code = get_rl_index(rl, last, run, level1);
1228  bits <<= rl->table_vlc[code][1];
1229  len += rl->table_vlc[code][1];
1230  bits += rl->table_vlc[code][0];
1231  bits = bits * 2 + sign;
1232  len++;
1233 
1234  if (code != rl->n && len < len_tab[index]) {
1235  bits_tab[index] = bits;
1236  len_tab[index] = len;
1237  }
1238  }
1239  /* ESC2 */
1240  bits = rl->table_vlc[rl->n][0];
1241  len = rl->table_vlc[rl->n][1];
1242  bits = bits * 4 + 2;
1243  len += 2; // esc2
1244  run1 = run - rl->max_run[last][level] - 1;
1245  if (run1 >= 0) {
1246  code = get_rl_index(rl, last, run1, level);
1247  bits <<= rl->table_vlc[code][1];
1248  len += rl->table_vlc[code][1];
1249  bits += rl->table_vlc[code][0];
1250  bits = bits * 2 + sign;
1251  len++;
1252 
1253  if (code != rl->n && len < len_tab[index]) {
1254  bits_tab[index] = bits;
1255  len_tab[index] = len;
1256  }
1257  }
1258  /* ESC3 */
1259  bits = rl->table_vlc[rl->n][0];
1260  len = rl->table_vlc[rl->n][1];
1261  bits = bits * 4 + 3;
1262  len += 2; // esc3
1263  bits = bits * 2 + last;
1264  len++;
1265  bits = bits * 64 + run;
1266  len += 6;
1267  bits = bits * 2 + 1;
1268  len++; // marker
1269  bits = bits * 4096 + (slevel & 0xfff);
1270  len += 12;
1271  bits = bits * 2 + 1;
1272  len++; // marker
1273 
1274  if (len < len_tab[index]) {
1275  bits_tab[index] = bits;
1276  len_tab[index] = len;
1277  }
1278  }
1279  }
1280  }
1281 }
1282 
1284 {
1285  MpegEncContext *s = avctx->priv_data;
1286  int ret;
1287  static int done = 0;
1288 
1289  if ((ret = ff_MPV_encode_init(avctx)) < 0)
1290  return ret;
1291 
1292  if (!done) {
1293  done = 1;
1294 
1295  init_uni_dc_tab();
1296 
1298 
1301  }
1302 
1303  s->min_qcoeff = -2048;
1304  s->max_qcoeff = 2047;
1310  s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1313 
1314  if (s->flags & CODEC_FLAG_GLOBAL_HEADER) {
1315  s->avctx->extradata = av_malloc(1024);
1316  init_put_bits(&s->pb, s->avctx->extradata, 1024);
1317 
1318  if (!(s->workaround_bugs & FF_BUG_MS))
1320  mpeg4_encode_vol_header(s, 0, 0);
1321 
1322 // ff_mpeg4_stuffing(&s->pb); ?
1323  flush_put_bits(&s->pb);
1324  s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3;
1325  }
1326  return 0;
1327 }
1328 
1330 {
1331  uint8_t *start = put_bits_ptr(&s->pb);
1332  uint8_t *end = s->pb.buf_end;
1333  int size = end - start;
1334  int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1335  int tex_size = (size - 2 * pb_size) & (~3);
1336 
1337  set_put_bits_buffer_size(&s->pb, pb_size);
1338  init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1339  init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1340 }
1341 
1343 {
1344  const int pb2_len = put_bits_count(&s->pb2);
1345  const int tex_pb_len = put_bits_count(&s->tex_pb);
1346  const int bits = put_bits_count(&s->pb);
1347 
1348  if (s->pict_type == AV_PICTURE_TYPE_I) {
1349  put_bits(&s->pb, 19, DC_MARKER);
1350  s->misc_bits += 19 + pb2_len + bits - s->last_bits;
1351  s->i_tex_bits += tex_pb_len;
1352  } else {
1353  put_bits(&s->pb, 17, MOTION_MARKER);
1354  s->misc_bits += 17 + pb2_len;
1355  s->mv_bits += bits - s->last_bits;
1356  s->p_tex_bits += tex_pb_len;
1357  }
1358 
1359  flush_put_bits(&s->pb2);
1360  flush_put_bits(&s->tex_pb);
1361 
1362  set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1363  avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1364  avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1365  s->last_bits = put_bits_count(&s->pb);
1366 }
1367 
1369 {
1370  int mb_num_bits = av_log2(s->mb_num - 1) + 1;
1371 
1373  put_bits(&s->pb, 1, 1);
1374 
1375  put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width);
1376  put_bits(&s->pb, s->quant_precision, s->qscale);
1377  put_bits(&s->pb, 1, 0); /* no HEC */
1378 }
1379 
1380 #define OFFSET(x) offsetof(MpegEncContext, x)
1381 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1382 static const AVOption options[] = {
1383  { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1384  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
1386  { NULL },
1387 };
1388 
1389 static const AVClass mpeg4enc_class = {
1390  .class_name = "MPEG4 encoder",
1391  .item_name = av_default_item_name,
1392  .option = options,
1393  .version = LIBAVUTIL_VERSION_INT,
1394 };
1395 
1397  .name = "mpeg4",
1398  .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1399  .type = AVMEDIA_TYPE_VIDEO,
1400  .id = AV_CODEC_ID_MPEG4,
1401  .priv_data_size = sizeof(MpegEncContext),
1402  .init = encode_init,
1403  .encode2 = ff_MPV_encode_picture,
1405  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
1406  .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
1407  .priv_class = &mpeg4enc_class,
1408 };
int last_time_base
Definition: mpegvideo.h:573
static void mpeg4_encode_visual_object_header(MpegEncContext *s)
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
int aspect_ratio_info
Definition: mpegvideo.h:587
ScanTable intra_v_scantable
Definition: mpegvideo.h:321
RLTable ff_mpeg4_rl_intra
Definition: mpeg4data.h:109
int size
const uint8_t ff_mpeg4_c_dc_scale_table[32]
Definition: mpeg4data.h:363
int time_increment_bits
< number of bits to represent the fractional part of time (encoder only)
Definition: mpegvideo.h:572
AVOption.
Definition: opt.h:233
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:444
static uint8_t uni_mpeg4_intra_rl_len[64 *64 *2 *2]
Definition: mpeg4videoenc.c:41
const uint8_t * y_dc_scale_table
qscale -> y_dc_scale table
Definition: mpegvideo.h:374
static void mpeg4_encode_block(MpegEncContext *s, int16_t *block, int n, int intra_dc, uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
Encode an 8x8 block.
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG1 & B-frame MPEG4
Definition: mpegvideo.h:453
void ff_clean_mpeg4_qscales(MpegEncContext *s)
modify mb_type & qscale so that encoding is acually possible in mpeg4
#define CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:668
#define CANDIDATE_MB_TYPE_BIDIR
Definition: mpegvideo.h:476
RLTable ff_h263_rl_inter
Definition: h263data.h:162
int16_t(*[3] ac_val)[16]
used for for mpeg4 AC prediction, all 3 arrays must be continuous
Definition: mpegvideo.h:380
static int get_block_rate(MpegEncContext *s, int16_t block[64], int block_last_index, uint8_t scantable[64])
Return the number of bits that encoding the 8x8 block in block would need.
Definition: mpeg4videoenc.c:63
#define FF_COMPLIANCE_VERY_STRICT
Strictly conform to an older more strict version of the spec or reference software.
Definition: avcodec.h:2328
int ff_MPV_encode_end(AVCodecContext *avctx)
const uint8_t ff_h263_intra_MCBPC_code[9]
Definition: h263data.h:36
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:740
const uint8_t ff_h263_cbpy_tab[16][2]
Definition: h263data.h:85
int num
numerator
Definition: rational.h:44
static void skip_put_bits(PutBitContext *s, int n)
Skip the given number of bits.
Definition: put_bits.h:225
void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
Copy the content of src to the bitstream.
Definition: bitstream.c:61
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:1422
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:499
mpegvideo header.
#define FF_ASPECT_EXTENDED
Definition: avcodec.h:1230
static uint32_t uni_mpeg4_intra_rl_bits[64 *64 *2 *2]
Definition: mpeg4videoenc.c:40
#define DC_MARKER
Definition: mpeg4video.h:54
int mpv_flags
flags set by private options
Definition: mpegvideo.h:709
uint8_t permutated[64]
Definition: dsputil.h:113
uint8_t run
Definition: svq3.c:142
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:502
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:507
int mb_num
number of MBs of a picture
Definition: mpegvideo.h:305
int profile
profile
Definition: avcodec.h:2596
#define FF_LAMBDA_SHIFT
Definition: avutil.h:205
AVCodec.
Definition: avcodec.h:2755
int time_base
time in seconds of last I,P,S Frame
Definition: mpegvideo.h:574
RLTable.
Definition: rl.h:38
int qscale
QP.
Definition: mpegvideo.h:392
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:312
static av_cold void init_uni_dc_tab(void)
void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
#define INPLACE_OFFSET
Definition: mpegvideo.h:76
int field_select[2][2]
Definition: mpegvideo.h:452
int block_wrap[6]
Definition: mpegvideo.h:486
Macro definitions for various function/variable attributes.
int quant_precision
Definition: mpegvideo.h:585
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1173
#define FF_BUG_MS
Work around various bugs in Microsoft's broken decoders.
Definition: avcodec.h:2312
#define FF_MPV_FLAG_CBP_RD
Definition: mpegvideo.h:736
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:2680
void ff_mpeg4_stuffing(PutBitContext *pbc)
add mpeg4 stuffing bits (01...1)
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:38
static uint8_t uni_DCtab_chrom_len[512]
Definition: mpeg4videoenc.c:34
int8_t * max_run[2]
encoding & decoding
Definition: rl.h:46
int64_t time
time of current frame
Definition: mpegvideo.h:575
#define MV_DIRECT
bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4) ...
Definition: mpegvideo.h:439
uint8_t bits
Definition: crc.c:216
uint8_t
#define av_cold
Definition: attributes.h:66
AVOptions.
PutBitContext pb2
used for data partitioned VOPs
Definition: mpegvideo.h:595
const uint8_t ff_h263_intra_MCBPC_bits[9]
Definition: h263data.h:37
#define VOP_STARTCODE
Definition: mpeg4video.h:60
#define CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:684
static int decide_ac_pred(MpegEncContext *s, int16_t block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:183
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:540
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1162
int no_rounding
apply no rounding to motion compensation (MPEG4, msmpeg4, ...) for b-frames rounding mode is always 0...
Definition: mpegvideo.h:459
int interlaced_dct
Definition: mpegvideo.h:666
const uint8_t ff_h263_inter_MCBPC_bits[28]
Definition: h263data.h:50
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:366
const uint8_t ff_mpeg4_DCtab_chrom[13][2]
Definition: mpeg4data.h:41
#define RECT_SHAPE
Definition: mpeg4video.h:33
int8_t * max_level[2]
encoding & decoding
Definition: rl.h:45
uint8_t idct_permutation[64]
idct input permutation.
Definition: dsputil.h:240
int flags2
AVCodecContext.flags2.
Definition: mpegvideo.h:284
#define CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:685
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:500
#define CODEC_FLAG_AC_PRED
H.263 advanced intra coding / MPEG-4 AC prediction.
Definition: avcodec.h:687
static const int dquant_code[5]
#define MAX_LEVEL
Definition: rl.h:35
static uint32_t uni_mpeg4_inter_rl_bits[64 *64 *2 *2]
Definition: mpeg4videoenc.c:42
static int ff_mpeg4_pred_dc(MpegEncContext *s, int n, int level, int *dir_ptr, int encoding)
Predict the dc.
Definition: mpeg4video.h:172
int dquant
qscale difference to prev qscale
Definition: mpegvideo.h:398
#define MOTION_MARKER
Definition: mpeg4video.h:53
#define UNI_MPEG4_ENC_INDEX(last, run, level)
Definition: mpeg4videoenc.c:47
#define ROUNDED_DIV(a, b)
Definition: common.h:51
int ff_MPV_encode_init(AVCodecContext *avctx)
static void mpeg4_encode_gop_header(MpegEncContext *s)
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:846
void ff_mpeg4_init_partitions(MpegEncContext *s)
#define CANDIDATE_MB_TYPE_DIRECT
Definition: mpegvideo.h:473
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
Definition: put_bits.h:204
uint8_t * mbskip_table
Definition: mpegvideo.h:137
static void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
Restore the ac coefficients in block that have been changed by decide_ac_pred().
Definition: mpeg4videoenc.c:98
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:505
void ff_mpeg4_merge_partitions(MpegEncContext *s)
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:381
#define CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:740
int strict_std_compliance
strictly follow the std (MPEG4, ...)
Definition: mpegvideo.h:288
int partitioned_frame
is current frame partitioned
Definition: mpegvideo.h:590
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:142
void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
#define SIMPLE_VO_TYPE
Definition: mpeg4video.h:38
uint8_t * buf
Definition: put_bits.h:43
void ff_mpeg4_init_direct_mv(MpegEncContext *s)
Definition: mpeg4video.c:80
const char * name
Name of the codec implementation.
Definition: avcodec.h:2762
int quarter_sample
1->qpel, 0->half pel ME/MC
Definition: mpegvideo.h:586
uint16_t * mb_type
Table for candidate MB types for encoding.
Definition: mpegvideo.h:466
av_const int ff_h263_aspect_to_info(AVRational aspect)
Return the 4 bit value that specifies the given aspect ratio.
Definition: ituh263enc.c:87
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:139
int low_delay
no reordering needed / has no b-frames
Definition: mpegvideo.h:591
static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab)
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:72
void ff_clean_h263_qscales(MpegEncContext *s)
modify qscale so that encoding is acually possible in h263 (limit difference to -2..2)
Definition: ituh263enc.c:272
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:503
#define ADV_SIMPLE_VO_TYPE
Definition: mpeg4video.h:44
const uint8_t ff_mpeg4_DCtab_lum[13][2]
Definition: mpeg4data.h:35
uint8_t ff_mpeg4_static_rl_table_store[3][2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: mpeg4video.c:27
int n
number of entries of table_vlc minus 1
Definition: rl.h:39
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:168
#define FFMIN(a, b)
Definition: common.h:57
const uint8_t ff_mpeg4_y_dc_scale_table[32]
Definition: mpeg4data.h:359
const uint16_t(* table_vlc)[2]
Definition: rl.h:41
Picture new_picture
copy of the source picture structure for encoding.
Definition: mpegvideo.h:360
static uint8_t uni_mpeg4_inter_rl_len[64 *64 *2 *2]
Definition: mpeg4videoenc.c:43
int16_t(*[2] motion_val)[2]
Definition: mpegvideo.h:107
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:370
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:2597
Picture.
Definition: mpegvideo.h:99
static const AVClass mpeg4enc_class
int alternate_scan
Definition: mpegvideo.h:654
static uint16_t uni_DCtab_lum_bits[512]
Definition: mpeg4videoenc.c:35
int coded_score[8]
Definition: mpegvideo.h:509
static uint16_t uni_DCtab_chrom_bits[512]
Definition: mpeg4videoenc.c:36
static int get_b_cbp(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y, int mb_type)
static uint8_t uni_DCtab_lum_len[512]
Definition: mpeg4videoenc.c:33
int level
level
Definition: avcodec.h:2679
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:314
const uint8_t ff_h263_inter_MCBPC_code[28]
Definition: h263data.h:41
int ac_esc_length
num of bits needed to encode the longest esc
Definition: mpegvideo.h:501
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
static void set_put_bits_buffer_size(PutBitContext *s, int size)
Change the end of the buffer.
Definition: put_bits.h:237
#define CONFIG_MPEG4_ENCODER
Definition: config.h:897
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix)
int block_index[6]
index to current MB in block based arrays with edges
Definition: mpegvideo.h:485
if(ac->has_optimized_func)
int * mb_index2xy
mb_index -> mb_x + mb_y*mb_stride
Definition: mpegvideo.h:489
#define VE
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:441
NULL
Definition: eval.c:55
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:438
uint8_t * luma_dc_vlc_length
Definition: mpegvideo.h:506
unsigned int lambda2
(lambda*lambda) >> FF_LAMBDA_SHIFT
Definition: mpegvideo.h:395
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:306
av_default_item_name
Definition: dnxhdenc.c:45
main external API structure.
Definition: avcodec.h:1054
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:489
ScanTable intra_scantable
Definition: mpegvideo.h:319
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:268
uint8_t * buf_end
Definition: put_bits.h:43
int data_partitioning
data partitioning flag from header
Definition: mpegvideo.h:589
int extradata_size
Definition: avcodec.h:1163
uint8_t * inter_ac_vlc_length
Definition: mpegvideo.h:504
int progressive_sequence
Definition: mpegvideo.h:640
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:1581
Describe the class of an AVClass context structure.
Definition: log.h:33
ScanTable intra_h_scantable
Definition: mpegvideo.h:320
int index
Definition: gxfenc.c:72
static av_cold int encode_init(AVCodecContext *avctx)
static int mpeg4_get_block_length(MpegEncContext *s, int16_t *block, int n, int intra_dc, uint8_t *scan_table)
static void ff_h263_encode_motion_vector(MpegEncContext *s, int x, int y, int f_code)
Definition: h263.h:145
DSPContext dsp
pointers for accelerated dsp functions
Definition: mpegvideo.h:411
int f_code
forward MV resolution
Definition: mpegvideo.h:415
int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
#define CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:690
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:1588
#define MV_DIR_FORWARD
Definition: mpegvideo.h:437
int max_b_frames
max number of b-frames for encoding
Definition: mpegvideo.h:285
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:399
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s)
Definition: mpeg4video.c:29
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:113
const uint8_t * c_dc_scale_table
qscale -> c_dc_scale table
Definition: mpegvideo.h:375
uint8_t level
Definition: svq3.c:143
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:451
MpegEncContext.
Definition: mpegvideo.h:264
int8_t * qscale_table
Definition: mpegvideo.h:104
#define MAX_RUN
Definition: rl.h:34
struct AVCodecContext * avctx
Definition: mpegvideo.h:266
PutBitContext pb
bit output
Definition: mpegvideo.h:337
#define VISUAL_OBJ_STARTCODE
Definition: mpeg4video.h:59
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:786
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:301
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:88
#define CODEC_FLAG2_NO_OUTPUT
Skip bitstream encoding.
Definition: avcodec.h:692
int shared
Definition: mpegvideo.h:201
void(* clear_block)(int16_t *block)
Definition: dsputil.h:142
Bi-dir predicted.
Definition: avutil.h:255
me_cmp_func sad[6]
Definition: dsputil.h:148
static const AVOption options[]
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:53
int den
denominator
Definition: rational.h:45
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:498
static int get_rl_index(const RLTable *rl, int last, int run, int level)
Definition: rl.h:75
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
void * priv_data
Definition: avcodec.h:1090
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:541
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:297
int len
#define av_log2
Definition: intmath.h:85
av_cold void ff_init_rl(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: mpegvideo.c:1479
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:677
PutBitContext tex_pb
used for data partitioned VOPs
Definition: mpegvideo.h:594
Picture next_picture
copy of the next picture structure.
Definition: mpegvideo.h:354
static int get_p_cbp(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: h263.h:156
Picture ** reordered_input_picture
pointer to the next pictures in codedorder for encoding
Definition: mpegvideo.h:310
#define LIBAVCODEC_IDENT
Definition: version.h:43
struct AVFrame f
Definition: mpegvideo.h:100
void avpriv_put_string(PutBitContext *pb, const char *string, int terminate_string)
Put the string string in the bitstream.
Definition: bitstream.c:50
int flags
AVCodecContext.flags (HQ, MV4, ...)
Definition: mpegvideo.h:283
int workaround_bugs
workaround bugs in encoders which cannot be detected automatically
Definition: mpegvideo.h:289
static int mpeg4_get_dc_length(int level, int n)
void ff_set_mpeg4_time(MpegEncContext *s)
static void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64], int intra_dc[6], uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
#define MV_TYPE_8X8
4 vectors (h263, mpeg4 4MV)
Definition: mpegvideo.h:442
int b_code
backward MV resolution for B Frames (mpeg4)
Definition: mpegvideo.h:416
static void mpeg4_encode_dc(PutBitContext *s, int level, int n)
Encode the dc value.
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
static void mpeg4_encode_vol_header(MpegEncContext *s, int vo_number, int vol_number)
#define OFFSET(x)
AVCodec ff_mpeg4_encoder
Predicted.
Definition: avutil.h:254
#define GOP_STARTCODE
Definition: mpeg4video.h:58
#define VOS_STARTCODE
Definition: mpeg4video.h:56
static int16_t block[64]
Definition: dct-test.c:170