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mpeg4videoenc.c
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1 /*
2  * MPEG-4 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 FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/attributes.h"
24 #include "libavutil/log.h"
25 #include "libavutil/opt.h"
26 #include "mpegutils.h"
27 #include "mpegvideo.h"
28 #include "h263.h"
29 #include "mpeg4video.h"
30 
31 /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC
32  * differences in MPEG-4. Unified in the sense that the specification specifies
33  * this encoding in several steps. */
36 static uint16_t uni_DCtab_lum_bits[512];
37 static uint16_t uni_DCtab_chrom_bits[512];
38 
39 /* Unified encoding tables for run length encoding of coefficients.
40  * Unified in the sense that the specification specifies the encoding in several steps. */
41 static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2];
42 static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2];
43 static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2];
44 static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2];
45 
46 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level))
47 //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64)
48 #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level))
49 
50 /* MPEG-4
51  * inter
52  * max level: 24/6
53  * max run: 53/63
54  *
55  * intra
56  * max level: 53/16
57  * max run: 29/41
58  */
59 
60 /**
61  * Return the number of bits that encoding the 8x8 block in block would need.
62  * @param[in] block_last_index last index in scantable order that refers to a non zero element in block.
63  */
64 static inline int get_block_rate(MpegEncContext *s, int16_t block[64],
65  int block_last_index, uint8_t scantable[64])
66 {
67  int last = 0;
68  int j;
69  int rate = 0;
70 
71  for (j = 1; j <= block_last_index; j++) {
72  const int index = scantable[j];
73  int level = block[index];
74  if (level) {
75  level += 64;
76  if ((level & (~127)) == 0) {
77  if (j < block_last_index)
78  rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
79  else
80  rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)];
81  } else
82  rate += s->ac_esc_length;
83 
84  last = j;
85  }
86  }
87 
88  return rate;
89 }
90 
91 /**
92  * Restore the ac coefficients in block that have been changed by decide_ac_pred().
93  * This function also restores s->block_last_index.
94  * @param[in,out] block MB coefficients, these will be restored
95  * @param[in] dir ac prediction direction for each 8x8 block
96  * @param[out] st scantable for each 8x8 block
97  * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order
98  */
99 static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64],
100  const int dir[6], uint8_t *st[6],
101  const int zigzag_last_index[6])
102 {
103  int i, n;
104  memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6);
105 
106  for (n = 0; n < 6; n++) {
107  int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
108 
109  st[n] = s->intra_scantable.permutated;
110  if (dir[n]) {
111  /* top prediction */
112  for (i = 1; i < 8; i++)
113  block[n][s->idsp.idct_permutation[i]] = ac_val[i + 8];
114  } else {
115  /* left prediction */
116  for (i = 1; i < 8; i++)
117  block[n][s->idsp.idct_permutation[i << 3]] = ac_val[i];
118  }
119  }
120 }
121 
122 /**
123  * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4.
124  * This function will also update s->block_last_index and s->ac_val.
125  * @param[in,out] block MB coefficients, these will be updated if 1 is returned
126  * @param[in] dir ac prediction direction for each 8x8 block
127  * @param[out] st scantable for each 8x8 block
128  * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order
129  */
130 static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64],
131  const int dir[6], uint8_t *st[6],
132  int zigzag_last_index[6])
133 {
134  int score = 0;
135  int i, n;
136  int8_t *const qscale_table = s->current_picture.qscale_table;
137 
138  memcpy(zigzag_last_index, s->block_last_index, sizeof(int) * 6);
139 
140  for (n = 0; n < 6; n++) {
141  int16_t *ac_val, *ac_val1;
142 
143  score -= get_block_rate(s, block[n], s->block_last_index[n],
145 
146  ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
147  ac_val1 = ac_val;
148  if (dir[n]) {
149  const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;
150  /* top prediction */
151  ac_val -= s->block_wrap[n] * 16;
152  if (s->mb_y == 0 || s->qscale == qscale_table[xy] || n == 2 || n == 3) {
153  /* same qscale */
154  for (i = 1; i < 8; i++) {
155  const int level = block[n][s->idsp.idct_permutation[i]];
156  block[n][s->idsp.idct_permutation[i]] = level - ac_val[i + 8];
157  ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
158  ac_val1[i + 8] = level;
159  }
160  } else {
161  /* different qscale, we must rescale */
162  for (i = 1; i < 8; i++) {
163  const int level = block[n][s->idsp.idct_permutation[i]];
164  block[n][s->idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->qscale);
165  ac_val1[i] = block[n][s->idsp.idct_permutation[i << 3]];
166  ac_val1[i + 8] = level;
167  }
168  }
169  st[n] = s->intra_h_scantable.permutated;
170  } else {
171  const int xy = s->mb_x - 1 + s->mb_y * s->mb_stride;
172  /* left prediction */
173  ac_val -= 16;
174  if (s->mb_x == 0 || s->qscale == qscale_table[xy] || n == 1 || n == 3) {
175  /* same qscale */
176  for (i = 1; i < 8; i++) {
177  const int level = block[n][s->idsp.idct_permutation[i << 3]];
178  block[n][s->idsp.idct_permutation[i << 3]] = level - ac_val[i];
179  ac_val1[i] = level;
180  ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
181  }
182  } else {
183  /* different qscale, we must rescale */
184  for (i = 1; i < 8; i++) {
185  const int level = block[n][s->idsp.idct_permutation[i << 3]];
186  block[n][s->idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->qscale);
187  ac_val1[i] = level;
188  ac_val1[i + 8] = block[n][s->idsp.idct_permutation[i]];
189  }
190  }
191  st[n] = s->intra_v_scantable.permutated;
192  }
193 
194  for (i = 63; i > 0; i--) // FIXME optimize
195  if (block[n][st[n][i]])
196  break;
197  s->block_last_index[n] = i;
198 
199  score += get_block_rate(s, block[n], s->block_last_index[n], st[n]);
200  }
201 
202  if (score < 0) {
203  return 1;
204  } else {
205  restore_ac_coeffs(s, block, dir, st, zigzag_last_index);
206  return 0;
207  }
208 }
209 
210 /**
211  * modify mb_type & qscale so that encoding is actually possible in MPEG-4
212  */
214 {
215  int i;
216  int8_t *const qscale_table = s->current_picture.qscale_table;
217 
219 
220  if (s->pict_type == AV_PICTURE_TYPE_B) {
221  int odd = 0;
222  /* ok, come on, this isn't funny anymore, there's more code for
223  * handling this MPEG-4 mess than for the actual adaptive quantization */
224 
225  for (i = 0; i < s->mb_num; i++) {
226  int mb_xy = s->mb_index2xy[i];
227  odd += qscale_table[mb_xy] & 1;
228  }
229 
230  if (2 * odd > s->mb_num)
231  odd = 1;
232  else
233  odd = 0;
234 
235  for (i = 0; i < s->mb_num; i++) {
236  int mb_xy = s->mb_index2xy[i];
237  if ((qscale_table[mb_xy] & 1) != odd)
238  qscale_table[mb_xy]++;
239  if (qscale_table[mb_xy] > 31)
240  qscale_table[mb_xy] = 31;
241  }
242 
243  for (i = 1; i < s->mb_num; i++) {
244  int mb_xy = s->mb_index2xy[i];
245  if (qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i - 1]] &&
246  (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) {
247  s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR;
248  }
249  }
250  }
251 }
252 
253 /**
254  * Encode the dc value.
255  * @param n block index (0-3 are luma, 4-5 are chroma)
256  */
257 static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n)
258 {
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 }
269 
270 static inline int mpeg4_get_dc_length(int level, int n)
271 {
272  if (n < 4)
273  return uni_DCtab_lum_len[level + 256];
274  else
275  return uni_DCtab_chrom_len[level + 256];
276 }
277 
278 /**
279  * Encode an 8x8 block.
280  * @param n block index (0-3 are luma, 4-5 are chroma)
281  */
282 static inline void mpeg4_encode_block(MpegEncContext *s,
283  int16_t *block, int n, int intra_dc,
284  uint8_t *scan_table, PutBitContext *dc_pb,
285  PutBitContext *ac_pb)
286 {
287  int i, last_non_zero;
288  uint32_t *bits_tab;
289  uint8_t *len_tab;
290  const int last_index = s->block_last_index[n];
291 
292  if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
293  /* MPEG-4 based DC predictor */
294  mpeg4_encode_dc(dc_pb, intra_dc, n);
295  if (last_index < 1)
296  return;
297  i = 1;
298  bits_tab = uni_mpeg4_intra_rl_bits;
299  len_tab = uni_mpeg4_intra_rl_len;
300  } else {
301  if (last_index < 0)
302  return;
303  i = 0;
304  bits_tab = uni_mpeg4_inter_rl_bits;
305  len_tab = uni_mpeg4_inter_rl_len;
306  }
307 
308  /* AC coefs */
309  last_non_zero = i - 1;
310  for (; i < last_index; i++) {
311  int level = block[scan_table[i]];
312  if (level) {
313  int run = i - last_non_zero - 1;
314  level += 64;
315  if ((level & (~127)) == 0) {
316  const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
317  put_bits(ac_pb, len_tab[index], bits_tab[index]);
318  } else { // ESC3
319  put_bits(ac_pb,
320  7 + 2 + 1 + 6 + 1 + 12 + 1,
321  (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) +
322  (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
323  }
324  last_non_zero = i;
325  }
326  }
327  /* if (i <= last_index) */ {
328  int level = block[scan_table[i]];
329  int run = i - last_non_zero - 1;
330  level += 64;
331  if ((level & (~127)) == 0) {
332  const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
333  put_bits(ac_pb, len_tab[index], bits_tab[index]);
334  } else { // ESC3
335  put_bits(ac_pb,
336  7 + 2 + 1 + 6 + 1 + 12 + 1,
337  (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) +
338  (1 << 13) + (((level - 64) & 0xfff) << 1) + 1);
339  }
340  }
341 }
342 
344  int16_t *block, int n,
345  int intra_dc, uint8_t *scan_table)
346 {
347  int i, last_non_zero;
348  uint8_t *len_tab;
349  const int last_index = s->block_last_index[n];
350  int len = 0;
351 
352  if (s->mb_intra) { // Note gcc (3.2.1 at least) will optimize this away
353  /* MPEG-4 based DC predictor */
354  len += mpeg4_get_dc_length(intra_dc, n);
355  if (last_index < 1)
356  return len;
357  i = 1;
358  len_tab = uni_mpeg4_intra_rl_len;
359  } else {
360  if (last_index < 0)
361  return 0;
362  i = 0;
363  len_tab = uni_mpeg4_inter_rl_len;
364  }
365 
366  /* AC coefs */
367  last_non_zero = i - 1;
368  for (; i < last_index; i++) {
369  int level = block[scan_table[i]];
370  if (level) {
371  int run = i - last_non_zero - 1;
372  level += 64;
373  if ((level & (~127)) == 0) {
374  const int index = UNI_MPEG4_ENC_INDEX(0, run, level);
375  len += len_tab[index];
376  } else { // ESC3
377  len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
378  }
379  last_non_zero = i;
380  }
381  }
382  /* if (i <= last_index) */ {
383  int level = block[scan_table[i]];
384  int run = i - last_non_zero - 1;
385  level += 64;
386  if ((level & (~127)) == 0) {
387  const int index = UNI_MPEG4_ENC_INDEX(1, run, level);
388  len += len_tab[index];
389  } else { // ESC3
390  len += 7 + 2 + 1 + 6 + 1 + 12 + 1;
391  }
392  }
393 
394  return len;
395 }
396 
397 static inline void mpeg4_encode_blocks(MpegEncContext *s, int16_t block[6][64],
398  int intra_dc[6], uint8_t **scan_table,
399  PutBitContext *dc_pb,
400  PutBitContext *ac_pb)
401 {
402  int i;
403 
404  if (scan_table) {
406  for (i = 0; i < 6; i++)
407  skip_put_bits(&s->pb,
408  mpeg4_get_block_length(s, block[i], i,
409  intra_dc[i], scan_table[i]));
410  } else {
411  /* encode each block */
412  for (i = 0; i < 6; i++)
413  mpeg4_encode_block(s, block[i], i,
414  intra_dc[i], scan_table[i], dc_pb, ac_pb);
415  }
416  } else {
418  for (i = 0; i < 6; i++)
419  skip_put_bits(&s->pb,
420  mpeg4_get_block_length(s, block[i], i, 0,
422  } else {
423  /* encode each block */
424  for (i = 0; i < 6; i++)
425  mpeg4_encode_block(s, block[i], i, 0,
426  s->intra_scantable.permutated, dc_pb, ac_pb);
427  }
428  }
429 }
430 
431 static inline int get_b_cbp(MpegEncContext *s, int16_t block[6][64],
432  int motion_x, int motion_y, int mb_type)
433 {
434  int cbp = 0, i;
435 
436  if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {
437  int score = 0;
438  const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6);
439 
440  for (i = 0; i < 6; i++) {
441  if (s->coded_score[i] < 0) {
442  score += s->coded_score[i];
443  cbp |= 1 << (5 - i);
444  }
445  }
446 
447  if (cbp) {
448  int zero_score = -6;
449  if ((motion_x | motion_y | s->dquant | mb_type) == 0)
450  zero_score -= 4; // 2 * MV + mb_type + cbp bit
451 
452  zero_score *= lambda;
453  if (zero_score <= score)
454  cbp = 0;
455  }
456 
457  for (i = 0; i < 6; i++) {
458  if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) {
459  s->block_last_index[i] = -1;
460  s->bdsp.clear_block(s->block[i]);
461  }
462  }
463  } else {
464  for (i = 0; i < 6; i++) {
465  if (s->block_last_index[i] >= 0)
466  cbp |= 1 << (5 - i);
467  }
468  }
469  return cbp;
470 }
471 
472 // FIXME this is duplicated to h263.c
473 static const int dquant_code[5] = { 1, 0, 9, 2, 3 };
474 
475 void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64],
476  int motion_x, int motion_y)
477 {
478  int cbpc, cbpy, pred_x, pred_y;
479  PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb;
480  PutBitContext *const tex_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb;
481  PutBitContext *const dc_pb = s->data_partitioning && s->pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb;
482  const int interleaved_stats = (s->avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning ? 1 : 0;
483 
484  if (!s->mb_intra) {
485  int i, cbp;
486 
487  if (s->pict_type == AV_PICTURE_TYPE_B) {
488  /* convert from mv_dir to type */
489  static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 };
490  int mb_type = mb_type_table[s->mv_dir];
491 
492  if (s->mb_x == 0) {
493  for (i = 0; i < 2; i++)
494  s->last_mv[i][0][0] =
495  s->last_mv[i][0][1] =
496  s->last_mv[i][1][0] =
497  s->last_mv[i][1][1] = 0;
498  }
499 
500  av_assert2(s->dquant >= -2 && s->dquant <= 2);
501  av_assert2((s->dquant & 1) == 0);
502  av_assert2(mb_type >= 0);
503 
504  /* nothing to do if this MB was skipped in the next P-frame */
505  if (s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]) { // FIXME avoid DCT & ...
506  s->skip_count++;
507  s->mv[0][0][0] =
508  s->mv[0][0][1] =
509  s->mv[1][0][0] =
510  s->mv[1][0][1] = 0;
511  s->mv_dir = MV_DIR_FORWARD; // doesn't matter
512  s->qscale -= s->dquant;
513 // s->mb_skipped = 1;
514 
515  return;
516  }
517 
518  cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type);
519 
520  if ((cbp | motion_x | motion_y | mb_type) == 0) {
521  /* direct MB with MV={0,0} */
522  av_assert2(s->dquant == 0);
523 
524  put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */
525 
526  if (interleaved_stats) {
527  s->misc_bits++;
528  s->last_bits++;
529  }
530  s->skip_count++;
531  return;
532  }
533 
534  put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */
535  put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge
536  put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :)
537  if (cbp)
538  put_bits(&s->pb, 6, cbp);
539 
540  if (cbp && mb_type) {
541  if (s->dquant)
542  put_bits(&s->pb, 2, (s->dquant >> 2) + 3);
543  else
544  put_bits(&s->pb, 1, 0);
545  } else
546  s->qscale -= s->dquant;
547 
548  if (!s->progressive_sequence) {
549  if (cbp)
550  put_bits(&s->pb, 1, s->interlaced_dct);
551  if (mb_type) // not direct mode
552  put_bits(&s->pb, 1, s->mv_type == MV_TYPE_FIELD);
553  }
554 
555  if (interleaved_stats)
556  s->misc_bits += get_bits_diff(s);
557 
558  if (!mb_type) {
560  ff_h263_encode_motion_vector(s, motion_x, motion_y, 1);
561  s->b_count++;
562  s->f_count++;
563  } else {
564  av_assert2(mb_type > 0 && mb_type < 4);
565  if (s->mv_type != MV_TYPE_FIELD) {
566  if (s->mv_dir & MV_DIR_FORWARD) {
568  s->mv[0][0][0] - s->last_mv[0][0][0],
569  s->mv[0][0][1] - s->last_mv[0][0][1],
570  s->f_code);
571  s->last_mv[0][0][0] =
572  s->last_mv[0][1][0] = s->mv[0][0][0];
573  s->last_mv[0][0][1] =
574  s->last_mv[0][1][1] = s->mv[0][0][1];
575  s->f_count++;
576  }
577  if (s->mv_dir & MV_DIR_BACKWARD) {
579  s->mv[1][0][0] - s->last_mv[1][0][0],
580  s->mv[1][0][1] - s->last_mv[1][0][1],
581  s->b_code);
582  s->last_mv[1][0][0] =
583  s->last_mv[1][1][0] = s->mv[1][0][0];
584  s->last_mv[1][0][1] =
585  s->last_mv[1][1][1] = s->mv[1][0][1];
586  s->b_count++;
587  }
588  } else {
589  if (s->mv_dir & MV_DIR_FORWARD) {
590  put_bits(&s->pb, 1, s->field_select[0][0]);
591  put_bits(&s->pb, 1, s->field_select[0][1]);
592  }
593  if (s->mv_dir & MV_DIR_BACKWARD) {
594  put_bits(&s->pb, 1, s->field_select[1][0]);
595  put_bits(&s->pb, 1, s->field_select[1][1]);
596  }
597  if (s->mv_dir & MV_DIR_FORWARD) {
598  for (i = 0; i < 2; i++) {
600  s->mv[0][i][0] - s->last_mv[0][i][0],
601  s->mv[0][i][1] - s->last_mv[0][i][1] / 2,
602  s->f_code);
603  s->last_mv[0][i][0] = s->mv[0][i][0];
604  s->last_mv[0][i][1] = s->mv[0][i][1] * 2;
605  }
606  s->f_count++;
607  }
608  if (s->mv_dir & MV_DIR_BACKWARD) {
609  for (i = 0; i < 2; i++) {
611  s->mv[1][i][0] - s->last_mv[1][i][0],
612  s->mv[1][i][1] - s->last_mv[1][i][1] / 2,
613  s->b_code);
614  s->last_mv[1][i][0] = s->mv[1][i][0];
615  s->last_mv[1][i][1] = s->mv[1][i][1] * 2;
616  }
617  s->b_count++;
618  }
619  }
620  }
621 
622  if (interleaved_stats)
623  s->mv_bits += get_bits_diff(s);
624 
625  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, &s->pb);
626 
627  if (interleaved_stats)
628  s->p_tex_bits += get_bits_diff(s);
629  } else { /* s->pict_type==AV_PICTURE_TYPE_B */
630  cbp = get_p_cbp(s, block, motion_x, motion_y);
631 
632  if ((cbp | motion_x | motion_y | s->dquant) == 0 &&
633  s->mv_type == MV_TYPE_16X16) {
634  /* Check if the B-frames can skip it too, as we must skip it
635  * if we skip here why didn't they just compress
636  * the skip-mb bits instead of reusing them ?! */
637  if (s->max_b_frames > 0) {
638  int i;
639  int x, y, offset;
640  uint8_t *p_pic;
641 
642  x = s->mb_x * 16;
643  y = s->mb_y * 16;
644 
645  offset = x + y * s->linesize;
646  p_pic = s->new_picture.f->data[0] + offset;
647 
648  s->mb_skipped = 1;
649  for (i = 0; i < s->max_b_frames; i++) {
650  uint8_t *b_pic;
651  int diff;
652  Picture *pic = s->reordered_input_picture[i + 1];
653 
654  if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B)
655  break;
656 
657  b_pic = pic->f->data[0] + offset;
658  if (!pic->shared)
659  b_pic += INPLACE_OFFSET;
660 
661  if (x + 16 > s->width || y + 16 > s->height) {
662  int x1, y1;
663  int xe = FFMIN(16, s->width - x);
664  int ye = FFMIN(16, s->height - y);
665  diff = 0;
666  for (y1 = 0; y1 < ye; y1++) {
667  for (x1 = 0; x1 < xe; x1++) {
668  diff += FFABS(p_pic[x1 + y1 * s->linesize] - b_pic[x1 + y1 * s->linesize]);
669  }
670  }
671  diff = diff * 256 / (xe * ye);
672  } else {
673  diff = s->mecc.sad[0](NULL, p_pic, b_pic, s->linesize, 16);
674  }
675  if (diff > s->qscale * 70) { // FIXME check that 70 is optimal
676  s->mb_skipped = 0;
677  break;
678  }
679  }
680  } else
681  s->mb_skipped = 1;
682 
683  if (s->mb_skipped == 1) {
684  /* skip macroblock */
685  put_bits(&s->pb, 1, 1);
686 
687  if (interleaved_stats) {
688  s->misc_bits++;
689  s->last_bits++;
690  }
691  s->skip_count++;
692 
693  return;
694  }
695  }
696 
697  put_bits(&s->pb, 1, 0); /* mb coded */
698  cbpc = cbp & 3;
699  cbpy = cbp >> 2;
700  cbpy ^= 0xf;
701  if (s->mv_type == MV_TYPE_16X16) {
702  if (s->dquant)
703  cbpc += 8;
704  put_bits(&s->pb,
707 
708  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
709  if (s->dquant)
710  put_bits(pb2, 2, dquant_code[s->dquant + 2]);
711 
712  if (!s->progressive_sequence) {
713  if (cbp)
714  put_bits(pb2, 1, s->interlaced_dct);
715  put_bits(pb2, 1, 0);
716  }
717 
718  if (interleaved_stats)
719  s->misc_bits += get_bits_diff(s);
720 
721  /* motion vectors: 16x16 mode */
722  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
723 
725  motion_x - pred_x,
726  motion_y - pred_y,
727  s->f_code);
728  } else if (s->mv_type == MV_TYPE_FIELD) {
729  if (s->dquant)
730  cbpc += 8;
731  put_bits(&s->pb,
734 
735  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
736  if (s->dquant)
737  put_bits(pb2, 2, dquant_code[s->dquant + 2]);
738 
740  if (cbp)
741  put_bits(pb2, 1, s->interlaced_dct);
742  put_bits(pb2, 1, 1);
743 
744  if (interleaved_stats)
745  s->misc_bits += get_bits_diff(s);
746 
747  /* motion vectors: 16x8 interlaced mode */
748  ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
749  pred_y /= 2;
750 
751  put_bits(&s->pb, 1, s->field_select[0][0]);
752  put_bits(&s->pb, 1, s->field_select[0][1]);
753 
755  s->mv[0][0][0] - pred_x,
756  s->mv[0][0][1] - pred_y,
757  s->f_code);
759  s->mv[0][1][0] - pred_x,
760  s->mv[0][1][1] - pred_y,
761  s->f_code);
762  } else {
764  put_bits(&s->pb,
765  ff_h263_inter_MCBPC_bits[cbpc + 16],
766  ff_h263_inter_MCBPC_code[cbpc + 16]);
767  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
768 
769  if (!s->progressive_sequence && cbp)
770  put_bits(pb2, 1, s->interlaced_dct);
771 
772  if (interleaved_stats)
773  s->misc_bits += get_bits_diff(s);
774 
775  for (i = 0; i < 4; i++) {
776  /* motion vectors: 8x8 mode*/
777  ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
778 
780  s->current_picture.motion_val[0][s->block_index[i]][0] - pred_x,
781  s->current_picture.motion_val[0][s->block_index[i]][1] - pred_y,
782  s->f_code);
783  }
784  }
785 
786  if (interleaved_stats)
787  s->mv_bits += get_bits_diff(s);
788 
789  mpeg4_encode_blocks(s, block, NULL, NULL, NULL, tex_pb);
790 
791  if (interleaved_stats)
792  s->p_tex_bits += get_bits_diff(s);
793 
794  s->f_count++;
795  }
796  } else {
797  int cbp;
798  int dc_diff[6]; // dc values with the dc prediction subtracted
799  int dir[6]; // prediction direction
800  int zigzag_last_index[6];
801  uint8_t *scan_table[6];
802  int i;
803 
804  for (i = 0; i < 6; i++)
805  dc_diff[i] = ff_mpeg4_pred_dc(s, i, block[i][0], &dir[i], 1);
806 
807  if (s->avctx->flags & AV_CODEC_FLAG_AC_PRED) {
808  s->ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index);
809  } else {
810  for (i = 0; i < 6; i++)
811  scan_table[i] = s->intra_scantable.permutated;
812  }
813 
814  /* compute cbp */
815  cbp = 0;
816  for (i = 0; i < 6; i++)
817  if (s->block_last_index[i] >= 1)
818  cbp |= 1 << (5 - i);
819 
820  cbpc = cbp & 3;
821  if (s->pict_type == AV_PICTURE_TYPE_I) {
822  if (s->dquant)
823  cbpc += 4;
824  put_bits(&s->pb,
827  } else {
828  if (s->dquant)
829  cbpc += 8;
830  put_bits(&s->pb, 1, 0); /* mb coded */
831  put_bits(&s->pb,
832  ff_h263_inter_MCBPC_bits[cbpc + 4],
833  ff_h263_inter_MCBPC_code[cbpc + 4]);
834  }
835  put_bits(pb2, 1, s->ac_pred);
836  cbpy = cbp >> 2;
837  put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
838  if (s->dquant)
839  put_bits(dc_pb, 2, dquant_code[s->dquant + 2]);
840 
841  if (!s->progressive_sequence)
842  put_bits(dc_pb, 1, s->interlaced_dct);
843 
844  if (interleaved_stats)
845  s->misc_bits += get_bits_diff(s);
846 
847  mpeg4_encode_blocks(s, block, dc_diff, scan_table, dc_pb, tex_pb);
848 
849  if (interleaved_stats)
850  s->i_tex_bits += get_bits_diff(s);
851  s->i_count++;
852 
853  /* restore ac coeffs & last_index stuff
854  * if we messed them up with the prediction */
855  if (s->ac_pred)
856  restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index);
857  }
858 }
859 
860 /**
861  * add MPEG-4 stuffing bits (01...1)
862  */
864 {
865  int length;
866  put_bits(pbc, 1, 0);
867  length = (-put_bits_count(pbc)) & 7;
868  if (length)
869  put_bits(pbc, length, (1 << length) - 1);
870 }
871 
872 /* must be called before writing the header */
874 {
875  if (s->pict_type == AV_PICTURE_TYPE_B) {
877  } else {
878  s->last_time_base = s->time_base;
879  s->time_base = FFUDIV(s->time, s->avctx->time_base.den);
880  }
881 }
882 
884 {
885  int hours, minutes, seconds;
886  int64_t time;
887 
888  put_bits(&s->pb, 16, 0);
889  put_bits(&s->pb, 16, GOP_STARTCODE);
890 
891  time = s->current_picture_ptr->f->pts;
892  if (s->reordered_input_picture[1])
893  time = FFMIN(time, s->reordered_input_picture[1]->f->pts);
894  time = time * s->avctx->time_base.num;
895  s->last_time_base = FFUDIV(time, s->avctx->time_base.den);
896 
897  seconds = FFUDIV(time, s->avctx->time_base.den);
898  minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60);
899  hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60);
900  hours = FFUMOD(hours , 24);
901 
902  put_bits(&s->pb, 5, hours);
903  put_bits(&s->pb, 6, minutes);
904  put_bits(&s->pb, 1, 1);
905  put_bits(&s->pb, 6, seconds);
906 
907  put_bits(&s->pb, 1, !!(s->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP));
908  put_bits(&s->pb, 1, 0); // broken link == NO
909 
910  ff_mpeg4_stuffing(&s->pb);
911 }
912 
914 {
915  int profile_and_level_indication;
916  int vo_ver_id;
917 
918  if (s->avctx->profile != FF_PROFILE_UNKNOWN) {
919  profile_and_level_indication = s->avctx->profile << 4;
920  } else if (s->max_b_frames || s->quarter_sample) {
921  profile_and_level_indication = 0xF0; // adv simple
922  } else {
923  profile_and_level_indication = 0x00; // simple
924  }
925 
926  if (s->avctx->level != FF_LEVEL_UNKNOWN)
927  profile_and_level_indication |= s->avctx->level;
928  else
929  profile_and_level_indication |= 1; // level 1
930 
931  if (profile_and_level_indication >> 4 == 0xF)
932  vo_ver_id = 5;
933  else
934  vo_ver_id = 1;
935 
936  // FIXME levels
937 
938  put_bits(&s->pb, 16, 0);
939  put_bits(&s->pb, 16, VOS_STARTCODE);
940 
941  put_bits(&s->pb, 8, profile_and_level_indication);
942 
943  put_bits(&s->pb, 16, 0);
944  put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
945 
946  put_bits(&s->pb, 1, 1);
947  put_bits(&s->pb, 4, vo_ver_id);
948  put_bits(&s->pb, 3, 1); // priority
949 
950  put_bits(&s->pb, 4, 1); // visual obj type== video obj
951 
952  put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME
953 
954  ff_mpeg4_stuffing(&s->pb);
955 }
956 
958  int vo_number,
959  int vol_number)
960 {
961  int vo_ver_id;
962 
963  if (!CONFIG_MPEG4_ENCODER)
964  return;
965 
966  if (s->max_b_frames || s->quarter_sample) {
967  vo_ver_id = 5;
969  } else {
970  vo_ver_id = 1;
971  s->vo_type = SIMPLE_VO_TYPE;
972  }
973 
974  put_bits(&s->pb, 16, 0);
975  put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
976  put_bits(&s->pb, 16, 0);
977  put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
978 
979  put_bits(&s->pb, 1, 0); /* random access vol */
980  put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
981  if (s->workaround_bugs & FF_BUG_MS) {
982  put_bits(&s->pb, 1, 0); /* is obj layer id= no */
983  } else {
984  put_bits(&s->pb, 1, 1); /* is obj layer id= yes */
985  put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */
986  put_bits(&s->pb, 3, 1); /* is obj layer priority */
987  }
988 
990 
991  put_bits(&s->pb, 4, s->aspect_ratio_info); /* aspect ratio info */
995  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
996  put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
997  }
998 
999  if (s->workaround_bugs & FF_BUG_MS) {
1000  put_bits(&s->pb, 1, 0); /* vol control parameters= no @@@ */
1001  } else {
1002  put_bits(&s->pb, 1, 1); /* vol control parameters= yes */
1003  put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */
1004  put_bits(&s->pb, 1, s->low_delay);
1005  put_bits(&s->pb, 1, 0); /* vbv parameters= no */
1006  }
1007 
1008  put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */
1009  put_bits(&s->pb, 1, 1); /* marker bit */
1010 
1011  put_bits(&s->pb, 16, s->avctx->time_base.den);
1012  if (s->time_increment_bits < 1)
1013  s->time_increment_bits = 1;
1014  put_bits(&s->pb, 1, 1); /* marker bit */
1015  put_bits(&s->pb, 1, 0); /* fixed vop rate=no */
1016  put_bits(&s->pb, 1, 1); /* marker bit */
1017  put_bits(&s->pb, 13, s->width); /* vol width */
1018  put_bits(&s->pb, 1, 1); /* marker bit */
1019  put_bits(&s->pb, 13, s->height); /* vol height */
1020  put_bits(&s->pb, 1, 1); /* marker bit */
1021  put_bits(&s->pb, 1, s->progressive_sequence ? 0 : 1);
1022  put_bits(&s->pb, 1, 1); /* obmc disable */
1023  if (vo_ver_id == 1)
1024  put_bits(&s->pb, 1, 0); /* sprite enable */
1025  else
1026  put_bits(&s->pb, 2, 0); /* sprite enable */
1027 
1028  put_bits(&s->pb, 1, 0); /* not 8 bit == false */
1029  put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */
1030 
1031  if (s->mpeg_quant) {
1034  }
1035 
1036  if (vo_ver_id != 1)
1037  put_bits(&s->pb, 1, s->quarter_sample);
1038  put_bits(&s->pb, 1, 1); /* complexity estimation disable */
1039  put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */
1040  put_bits(&s->pb, 1, s->data_partitioning ? 1 : 0);
1041  if (s->data_partitioning)
1042  put_bits(&s->pb, 1, 0); /* no rvlc */
1043 
1044  if (vo_ver_id != 1) {
1045  put_bits(&s->pb, 1, 0); /* newpred */
1046  put_bits(&s->pb, 1, 0); /* reduced res vop */
1047  }
1048  put_bits(&s->pb, 1, 0); /* scalability */
1049 
1050  ff_mpeg4_stuffing(&s->pb);
1051 
1052  /* user data */
1053  if (!(s->avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
1054  put_bits(&s->pb, 16, 0);
1055  put_bits(&s->pb, 16, 0x1B2); /* user_data */
1057  }
1058 }
1059 
1060 /* write MPEG-4 VOP header */
1062 {
1063  uint64_t time_incr;
1064  int64_t time_div, time_mod;
1065 
1066  if (s->pict_type == AV_PICTURE_TYPE_I) {
1067  if (!(s->avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) {
1068  if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy
1070  if (s->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || picture_number == 0) // HACK, the reference sw is buggy
1071  mpeg4_encode_vol_header(s, 0, 0);
1072  }
1073  if (!(s->workaround_bugs & FF_BUG_MS))
1075  }
1076 
1078 
1079  put_bits(&s->pb, 16, 0); /* vop header */
1080  put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
1081  put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
1082 
1083  time_div = FFUDIV(s->time, s->avctx->time_base.den);
1084  time_mod = FFUMOD(s->time, s->avctx->time_base.den);
1085  time_incr = time_div - s->last_time_base;
1086 
1087  // This limits the frame duration to max 1 hour
1088  if (time_incr > 3600) {
1089  av_log(s->avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr);
1090  return AVERROR(EINVAL);
1091  }
1092  while (time_incr--)
1093  put_bits(&s->pb, 1, 1);
1094 
1095  put_bits(&s->pb, 1, 0);
1096 
1097  put_bits(&s->pb, 1, 1); /* marker */
1098  put_bits(&s->pb, s->time_increment_bits, time_mod); /* time increment */
1099  put_bits(&s->pb, 1, 1); /* marker */
1100  put_bits(&s->pb, 1, 1); /* vop coded */
1101  if (s->pict_type == AV_PICTURE_TYPE_P) {
1102  put_bits(&s->pb, 1, s->no_rounding); /* rounding type */
1103  }
1104  put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */
1105  if (!s->progressive_sequence) {
1107  put_bits(&s->pb, 1, s->alternate_scan);
1108  }
1109  // FIXME sprite stuff
1110 
1111  put_bits(&s->pb, 5, s->qscale);
1112 
1113  if (s->pict_type != AV_PICTURE_TYPE_I)
1114  put_bits(&s->pb, 3, s->f_code); /* fcode_for */
1115  if (s->pict_type == AV_PICTURE_TYPE_B)
1116  put_bits(&s->pb, 3, s->b_code); /* fcode_back */
1117 
1118  return 0;
1119 }
1120 
1121 static av_cold void init_uni_dc_tab(void)
1122 {
1123  int level, uni_code, uni_len;
1124 
1125  for (level = -256; level < 256; level++) {
1126  int size, v, l;
1127  /* find number of bits */
1128  size = 0;
1129  v = abs(level);
1130  while (v) {
1131  v >>= 1;
1132  size++;
1133  }
1134 
1135  if (level < 0)
1136  l = (-level) ^ ((1 << size) - 1);
1137  else
1138  l = level;
1139 
1140  /* luminance */
1141  uni_code = ff_mpeg4_DCtab_lum[size][0];
1142  uni_len = ff_mpeg4_DCtab_lum[size][1];
1143 
1144  if (size > 0) {
1145  uni_code <<= size;
1146  uni_code |= l;
1147  uni_len += size;
1148  if (size > 8) {
1149  uni_code <<= 1;
1150  uni_code |= 1;
1151  uni_len++;
1152  }
1153  }
1154  uni_DCtab_lum_bits[level + 256] = uni_code;
1155  uni_DCtab_lum_len[level + 256] = uni_len;
1156 
1157  /* chrominance */
1158  uni_code = ff_mpeg4_DCtab_chrom[size][0];
1159  uni_len = ff_mpeg4_DCtab_chrom[size][1];
1160 
1161  if (size > 0) {
1162  uni_code <<= size;
1163  uni_code |= l;
1164  uni_len += size;
1165  if (size > 8) {
1166  uni_code <<= 1;
1167  uni_code |= 1;
1168  uni_len++;
1169  }
1170  }
1171  uni_DCtab_chrom_bits[level + 256] = uni_code;
1172  uni_DCtab_chrom_len[level + 256] = uni_len;
1173  }
1174 }
1175 
1176 static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab,
1177  uint8_t *len_tab)
1178 {
1179  int slevel, run, last;
1180 
1181  av_assert0(MAX_LEVEL >= 64);
1182  av_assert0(MAX_RUN >= 63);
1183 
1184  for (slevel = -64; slevel < 64; slevel++) {
1185  if (slevel == 0)
1186  continue;
1187  for (run = 0; run < 64; run++) {
1188  for (last = 0; last <= 1; last++) {
1189  const int index = UNI_MPEG4_ENC_INDEX(last, run, slevel + 64);
1190  int level = slevel < 0 ? -slevel : slevel;
1191  int sign = slevel < 0 ? 1 : 0;
1192  int bits, len, code;
1193  int level1, run1;
1194 
1195  len_tab[index] = 100;
1196 
1197  /* ESC0 */
1198  code = get_rl_index(rl, last, run, level);
1199  bits = rl->table_vlc[code][0];
1200  len = rl->table_vlc[code][1];
1201  bits = bits * 2 + sign;
1202  len++;
1203 
1204  if (code != rl->n && len < len_tab[index]) {
1205  bits_tab[index] = bits;
1206  len_tab[index] = len;
1207  }
1208  /* ESC1 */
1209  bits = rl->table_vlc[rl->n][0];
1210  len = rl->table_vlc[rl->n][1];
1211  bits = bits * 2;
1212  len++; // esc1
1213  level1 = level - rl->max_level[last][run];
1214  if (level1 > 0) {
1215  code = get_rl_index(rl, last, run, level1);
1216  bits <<= rl->table_vlc[code][1];
1217  len += rl->table_vlc[code][1];
1218  bits += rl->table_vlc[code][0];
1219  bits = bits * 2 + sign;
1220  len++;
1221 
1222  if (code != rl->n && len < len_tab[index]) {
1223  bits_tab[index] = bits;
1224  len_tab[index] = len;
1225  }
1226  }
1227  /* ESC2 */
1228  bits = rl->table_vlc[rl->n][0];
1229  len = rl->table_vlc[rl->n][1];
1230  bits = bits * 4 + 2;
1231  len += 2; // esc2
1232  run1 = run - rl->max_run[last][level] - 1;
1233  if (run1 >= 0) {
1234  code = get_rl_index(rl, last, run1, level);
1235  bits <<= rl->table_vlc[code][1];
1236  len += rl->table_vlc[code][1];
1237  bits += rl->table_vlc[code][0];
1238  bits = bits * 2 + sign;
1239  len++;
1240 
1241  if (code != rl->n && len < len_tab[index]) {
1242  bits_tab[index] = bits;
1243  len_tab[index] = len;
1244  }
1245  }
1246  /* ESC3 */
1247  bits = rl->table_vlc[rl->n][0];
1248  len = rl->table_vlc[rl->n][1];
1249  bits = bits * 4 + 3;
1250  len += 2; // esc3
1251  bits = bits * 2 + last;
1252  len++;
1253  bits = bits * 64 + run;
1254  len += 6;
1255  bits = bits * 2 + 1;
1256  len++; // marker
1257  bits = bits * 4096 + (slevel & 0xfff);
1258  len += 12;
1259  bits = bits * 2 + 1;
1260  len++; // marker
1261 
1262  if (len < len_tab[index]) {
1263  bits_tab[index] = bits;
1264  len_tab[index] = len;
1265  }
1266  }
1267  }
1268  }
1269 }
1270 
1272 {
1273  MpegEncContext *s = avctx->priv_data;
1274  int ret;
1275  static int done = 0;
1276 
1277  if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) {
1278  av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n");
1279  return AVERROR(EINVAL);
1280  }
1281 
1282  if ((ret = ff_mpv_encode_init(avctx)) < 0)
1283  return ret;
1284 
1285  if (!done) {
1286  done = 1;
1287 
1288  init_uni_dc_tab();
1289 
1291 
1294  }
1295 
1296  s->min_qcoeff = -2048;
1297  s->max_qcoeff = 2047;
1303  s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1;
1306 
1308  s->avctx->extradata = av_malloc(1024);
1309  init_put_bits(&s->pb, s->avctx->extradata, 1024);
1310 
1311  if (!(s->workaround_bugs & FF_BUG_MS))
1313  mpeg4_encode_vol_header(s, 0, 0);
1314 
1315 // ff_mpeg4_stuffing(&s->pb); ?
1316  flush_put_bits(&s->pb);
1317  s->avctx->extradata_size = (put_bits_count(&s->pb) + 7) >> 3;
1318  }
1319  return 0;
1320 }
1321 
1323 {
1324  uint8_t *start = put_bits_ptr(&s->pb);
1325  uint8_t *end = s->pb.buf_end;
1326  int size = end - start;
1327  int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start;
1328  int tex_size = (size - 2 * pb_size) & (~3);
1329 
1330  set_put_bits_buffer_size(&s->pb, pb_size);
1331  init_put_bits(&s->tex_pb, start + pb_size, tex_size);
1332  init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size);
1333 }
1334 
1336 {
1337  const int pb2_len = put_bits_count(&s->pb2);
1338  const int tex_pb_len = put_bits_count(&s->tex_pb);
1339  const int bits = put_bits_count(&s->pb);
1340 
1341  if (s->pict_type == AV_PICTURE_TYPE_I) {
1342  put_bits(&s->pb, 19, DC_MARKER);
1343  s->misc_bits += 19 + pb2_len + bits - s->last_bits;
1344  s->i_tex_bits += tex_pb_len;
1345  } else {
1346  put_bits(&s->pb, 17, MOTION_MARKER);
1347  s->misc_bits += 17 + pb2_len;
1348  s->mv_bits += bits - s->last_bits;
1349  s->p_tex_bits += tex_pb_len;
1350  }
1351 
1352  flush_put_bits(&s->pb2);
1353  flush_put_bits(&s->tex_pb);
1354 
1355  set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf);
1356  avpriv_copy_bits(&s->pb, s->pb2.buf, pb2_len);
1357  avpriv_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len);
1358  s->last_bits = put_bits_count(&s->pb);
1359 }
1360 
1362 {
1363  int mb_num_bits = av_log2(s->mb_num - 1) + 1;
1364 
1366  put_bits(&s->pb, 1, 1);
1367 
1368  put_bits(&s->pb, mb_num_bits, s->mb_x + s->mb_y * s->mb_width);
1369  put_bits(&s->pb, s->quant_precision, s->qscale);
1370  put_bits(&s->pb, 1, 0); /* no HEC */
1371 }
1372 
1373 #define OFFSET(x) offsetof(MpegEncContext, x)
1374 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1375 static const AVOption options[] = {
1376  { "data_partitioning", "Use data partitioning.", OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1377  { "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
1379  { NULL },
1380 };
1381 
1382 static const AVClass mpeg4enc_class = {
1383  .class_name = "MPEG4 encoder",
1384  .item_name = av_default_item_name,
1385  .option = options,
1386  .version = LIBAVUTIL_VERSION_INT,
1387 };
1388 
1390  .name = "mpeg4",
1391  .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
1392  .type = AVMEDIA_TYPE_VIDEO,
1393  .id = AV_CODEC_ID_MPEG4,
1394  .priv_data_size = sizeof(MpegEncContext),
1395  .init = encode_init,
1396  .encode2 = ff_mpv_encode_picture,
1397  .close = ff_mpv_encode_end,
1400  .priv_class = &mpeg4enc_class,
1401 };
int last_time_base
Definition: mpegvideo.h:386
static void mpeg4_encode_visual_object_header(MpegEncContext *s)
#define INPLACE_OFFSET
Definition: mpegutils.h:123
IDCTDSPContext idsp
Definition: mpegvideo.h:227
#define NULL
Definition: coverity.c:32
int aspect_ratio_info
Definition: mpegvideo.h:400
const char * s
Definition: avisynth_c.h:768
ScanTable intra_v_scantable
Definition: mpegvideo.h:90
RLTable ff_mpeg4_rl_intra
Definition: mpeg4data.h:109
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:385
AVOption.
Definition: opt.h:246
#define MV_TYPE_FIELD
2 vectors, one per field
Definition: mpegvideo.h:269
static uint8_t uni_mpeg4_intra_rl_len[64 *64 *2 *2]
Definition: mpeg4videoenc.c:42
const uint8_t * y_dc_scale_table
qscale -> y_dc_scale table
Definition: mpegvideo.h:185
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.
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:36
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
Definition: mpegvideo.h:278
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:206
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
void ff_clean_mpeg4_qscales(MpegEncContext *s)
modify mb_type & qscale so that encoding is actually possible in MPEG-4
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int16_t(*[3] ac_val)[16]
used for MPEG-4 AC prediction, all 3 arrays must be continuous
Definition: mpegvideo.h:191
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:64
#define FF_COMPLIANCE_VERY_STRICT
Strictly conform to an older more strict version of the spec or reference software.
Definition: avcodec.h:2974
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:605
int num
Numerator.
Definition: rational.h:59
#define CANDIDATE_MB_TYPE_BIDIR
Definition: mpegutils.h:114
static void skip_put_bits(PutBitContext *s, int n)
Skip the given number of bits.
Definition: put_bits.h:346
void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
Copy the content of src to the bitstream.
Definition: bitstream.c:64
int av_log2(unsigned v)
Definition: intmath.c:26
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:2165
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:308
int coded_score[12]
Definition: mpegvideo.h:320
mpegvideo header.
#define FF_ASPECT_EXTENDED
Definition: avcodec.h:1959
static uint32_t uni_mpeg4_intra_rl_bits[64 *64 *2 *2]
Definition: mpeg4videoenc.c:41
#define DC_MARKER
Definition: mpeg4video.h:54
int mpv_flags
flags set by private options
Definition: mpegvideo.h:526
uint8_t permutated[64]
Definition: idctdsp.h:33
uint8_t run
Definition: svq3.c:206
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:311
#define UNI_AC_ENC_INDEX(run, level)
Definition: mpegvideo.h:318
int mb_num
number of MBs of a picture
Definition: mpegvideo.h:130
int profile
profile
Definition: avcodec.h:3257
#define FF_LAMBDA_SHIFT
Definition: avutil.h:225
AVCodec.
Definition: avcodec.h:3730
int time_base
time in seconds of last I,P,S Frame
Definition: mpegvideo.h:387
RLTable.
Definition: rl.h:39
int qscale
QP.
Definition: mpegvideo.h:201
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
Definition: h263.c:307
static av_cold void init_uni_dc_tab(void)
int field_select[2][2]
Definition: mpegvideo.h:277
int block_wrap[6]
Definition: mpegvideo.h:294
Macro definitions for various function/variable attributes.
int quant_precision
Definition: mpegvideo.h:398
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1891
#define FF_BUG_MS
Work around various bugs in Microsoft's broken decoders.
Definition: avcodec.h:2957
#define FF_MPV_FLAG_CBP_RD
Definition: mpegvideo.h:574
static int16_t block[64]
Definition: dct.c:115
#define FF_LEVEL_UNKNOWN
Definition: avcodec.h:3356
void ff_mpeg4_stuffing(PutBitContext *pbc)
add MPEG-4 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:72
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: avcodec.h:1027
static uint8_t uni_DCtab_chrom_len[512]
Definition: mpeg4videoenc.c:35
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int8_t * max_run[2]
encoding & decoding
Definition: rl.h:47
int64_t time
time of current frame
Definition: mpegvideo.h:388
#define MV_DIRECT
bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4) ...
Definition: mpegvideo.h:264
uint8_t bits
Definition: crc.c:296
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVOptions.
PutBitContext pb2
used for data partitioned VOPs
Definition: mpegvideo.h:407
#define VOP_STARTCODE
Definition: mpeg4video.h:60
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
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 MPEG-4.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:294
int misc_bits
cbp, mb_type
Definition: mpegvideo.h:352
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1869
int no_rounding
apply no rounding to motion compensation (MPEG-4, msmpeg4, ...) for B-frames rounding mode is always ...
Definition: mpegvideo.h:284
int interlaced_dct
Definition: mpegvideo.h:481
Picture current_picture
copy of the current picture structure.
Definition: mpegvideo.h:177
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:46
const uint8_t ff_h263_intra_MCBPC_bits[9]
Definition: h263data.c:35
ptrdiff_t size
Definition: opengl_enc.c:101
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:309
static const int dquant_code[5]
#define MAX_LEVEL
Definition: rl.h:36
static uint32_t uni_mpeg4_inter_rl_bits[64 *64 *2 *2]
Definition: mpeg4videoenc.c:43
static int ff_mpeg4_pred_dc(MpegEncContext *s, int n, int level, int *dir_ptr, int encoding)
Predict the dc.
Definition: mpeg4video.h:180
int dquant
qscale difference to prev qscale
Definition: mpegvideo.h:207
#define av_log(a,...)
#define MOTION_MARKER
Definition: mpeg4video.h:53
#define UNI_MPEG4_ENC_INDEX(last, run, level)
Definition: mpeg4videoenc.c:48
#define ROUNDED_DIV(a, b)
Definition: common.h:56
static void mpeg4_encode_gop_header(MpegEncContext *s)
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:745
void ff_mpeg4_init_partitions(MpegEncContext *s)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:324
uint8_t * mbskip_table
Definition: mpegpicture.h:59
const uint8_t ff_h263_inter_MCBPC_code[28]
Definition: h263data.c:40
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:99
uint8_t * inter_ac_vlc_last_length
Definition: mpegvideo.h:316
void ff_mpeg4_merge_partitions(MpegEncContext *s)
int mb_skipped
MUST BE SET only during DECODING.
Definition: mpegvideo.h:192
int strict_std_compliance
strictly follow the std (MPEG-4, ...)
Definition: mpegvideo.h:115
av_default_item_name
int partitioned_frame
is current frame partitioned
Definition: mpegvideo.h:403
#define AVERROR(e)
Definition: error.h:43
int ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
void ff_mpeg4_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1849
#define SIMPLE_VO_TYPE
Definition: mpeg4video.h:38
uint8_t * buf
Definition: put_bits.h:38
GLsizei GLsizei * length
Definition: opengl_enc.c:115
void ff_mpeg4_init_direct_mv(MpegEncContext *s)
Definition: mpeg4video.c:71
const char * name
Name of the codec implementation.
Definition: avcodec.h:3737
int quarter_sample
1->qpel, 0->half pel ME/MC
Definition: mpegvideo.h:399
uint16_t * mb_type
Table for candidate MB types for encoding (defines in mpegutils.h)
Definition: mpegvideo.h:291
av_const int ff_h263_aspect_to_info(AVRational aspect)
Return the 4 bit value that specifies the given aspect ratio.
Definition: ituh263enc.c:89
int low_delay
no reordering needed / has no B-frames
Definition: mpegvideo.h:404
static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab)
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:85
void ff_clean_h263_qscales(MpegEncContext *s)
modify qscale so that encoding is actually possible in H.263 (limit difference to -2...
Definition: ituh263enc.c:266
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:312
#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:28
int n
number of entries of table_vlc minus 1
Definition: rl.h:40
const uint8_t ff_h263_inter_MCBPC_bits[28]
Definition: h263data.c:49
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:929
#define FFMIN(a, b)
Definition: common.h:96
const uint8_t ff_mpeg4_y_dc_scale_table[32]
Definition: mpeg4data.h:359
const uint16_t(* table_vlc)[2]
Definition: rl.h:42
#define AV_CODEC_FLAG_AC_PRED
H.263 advanced intra coding / MPEG-4 AC prediction.
Definition: avcodec.h:934
Picture new_picture
copy of the source picture structure for encoding.
Definition: mpegvideo.h:171
static uint8_t uni_mpeg4_inter_rl_len[64 *64 *2 *2]
Definition: mpeg4videoenc.c:44
int width
picture width / height.
Definition: avcodec.h:1941
int16_t(*[2] motion_val)[2]
Definition: mpegpicture.h:53
Picture * current_picture_ptr
pointer to the current picture
Definition: mpegvideo.h:181
#define FF_PROFILE_UNKNOWN
Definition: avcodec.h:3258
Picture.
Definition: mpegpicture.h:45
static const AVClass mpeg4enc_class
int alternate_scan
Definition: mpegvideo.h:468
static uint16_t uni_DCtab_lum_bits[512]
Definition: mpeg4videoenc.c:36
static uint16_t uni_DCtab_chrom_bits[512]
Definition: mpeg4videoenc.c:37
static int get_b_cbp(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y, int mb_type)
#define AV_CODEC_FLAG_PASS1
Use internal 2pass ratecontrol in first pass mode.
Definition: avcodec.h:892
static uint8_t uni_DCtab_lum_len[512]
Definition: mpeg4videoenc.c:34
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
int level
level
Definition: avcodec.h:3355
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
int n
Definition: avisynth_c.h:684
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
int ac_esc_length
num of bits needed to encode the longest esc
Definition: mpegvideo.h:310
static void set_put_bits_buffer_size(PutBitContext *s, int size)
Change the end of the buffer.
Definition: put_bits.h:358
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:293
int * mb_index2xy
mb_index -> mb_x + mb_y*mb_stride
Definition: mpegvideo.h:297
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1069
#define VE
#define MV_TYPE_16X16
1 vector for the whole mb
Definition: mpegvideo.h:266
#define MV_DIR_BACKWARD
Definition: mpegvideo.h:263
#define FFUDIV(a, b)
Definition: common.h:63
uint8_t * luma_dc_vlc_length
Definition: mpegvideo.h:317
unsigned int lambda2
(lambda*lambda) >> FF_LAMBDA_SHIFT
Definition: mpegvideo.h:204
ptrdiff_t linesize
line size, in bytes, may be different from width
Definition: mpegvideo.h:131
BlockDSPContext bdsp
Definition: mpegvideo.h:223
const uint8_t ff_h263_intra_MCBPC_code[9]
Definition: h263data.c:34
main external API structure.
Definition: avcodec.h:1754
ScanTable intra_scantable
Definition: mpegvideo.h:88
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
uint8_t * buf_end
Definition: put_bits.h:38
av_cold int ff_rl_init(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
Definition: rl.c:39
int ff_mpv_encode_init(AVCodecContext *avctx)
int data_partitioning
data partitioning flag from header
Definition: mpegvideo.h:402
int extradata_size
Definition: avcodec.h:1870
uint8_t * inter_ac_vlc_length
Definition: mpegvideo.h:315
int progressive_sequence
Definition: mpegvideo.h:454
uint16_t * intra_matrix
custom intra quantization matrix
Definition: avcodec.h:2327
Describe the class of an AVClass context structure.
Definition: log.h:67
ScanTable intra_h_scantable
Definition: mpegvideo.h:89
int index
Definition: gxfenc.c:89
#define CANDIDATE_MB_TYPE_DIRECT
Definition: mpegutils.h:111
static av_cold int encode_init(AVCodecContext *avctx)
struct AVFrame * f
Definition: mpegpicture.h:46
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:118
RLTable ff_h263_rl_inter
Definition: h263data.c:161
int f_code
forward MV resolution
Definition: mpegvideo.h:235
const uint8_t ff_h263_cbpy_tab[16][2]
Definition: h263data.c:84
uint16_t * inter_matrix
custom inter quantization matrix
Definition: avcodec.h:2334
#define MV_DIR_FORWARD
Definition: mpegvideo.h:262
int max_b_frames
max number of B-frames for encoding
Definition: mpegvideo.h:112
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
Definition: mpegvideo.h:209
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s)
Definition: mpeg4video.c:30
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
const uint8_t * c_dc_scale_table
qscale -> c_dc_scale table
Definition: mpegvideo.h:186
uint8_t level
Definition: svq3.c:207
me_cmp_func sad[6]
Definition: me_cmp.h:56
#define AV_CODEC_FLAG_GLOBAL_HEADER
Place global headers in extradata instead of every keyframe.
Definition: avcodec.h:925
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
Definition: mpegvideo.h:276
MpegEncContext.
Definition: mpegvideo.h:78
int8_t * qscale_table
Definition: mpegpicture.h:50
#define MAX_RUN
Definition: rl.h:35
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
PutBitContext pb
bit output
Definition: mpegvideo.h:148
#define VISUAL_OBJ_STARTCODE
Definition: mpeg4video.h:59
MECmpContext mecc
Definition: mpegvideo.h:228
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
Definition: mpegvideo.h:127
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
if(ret< 0)
Definition: vf_mcdeint.c:279
int shared
Definition: mpegpicture.h:88
#define AV_CODEC_FLAG2_NO_OUTPUT
Skip bitstream encoding.
Definition: avcodec.h:948
Bi-dir predicted.
Definition: avutil.h:276
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:48
int den
Denominator.
Definition: rational.h:60
int ff_mpv_encode_end(AVCodecContext *avctx)
static int get_rl_index(const RLTable *rl, int last, int run, int level)
Definition: rl.h:76
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s)
void * priv_data
Definition: avcodec.h:1796
int last_bits
temp var used for calculating the above vars
Definition: mpegvideo.h:353
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:353
int len
#define FFUMOD(a, b)
Definition: common.h:64
int16_t(* block)[64]
points to one of the following blocks
Definition: mpegvideo.h:498
PutBitContext tex_pb
used for data partitioned VOPs
Definition: mpegvideo.h:406
Picture next_picture
copy of the next picture structure.
Definition: mpegvideo.h:165
static int get_p_cbp(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: h263.h:129
Picture ** reordered_input_picture
pointer to the next pictures in coded order for encoding
Definition: mpegvideo.h:135
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1856
#define LIBAVCODEC_IDENT
Definition: version.h:42
void avpriv_put_string(PutBitContext *pb, const char *string, int terminate_string)
Put the string string in the bitstream.
Definition: bitstream.c:53
void INT64 start
Definition: avisynth_c.h:690
int workaround_bugs
workaround bugs in encoders which cannot be detected automatically
Definition: mpegvideo.h:116
static int mpeg4_get_dc_length(int level, int n)
void ff_set_mpeg4_time(MpegEncContext *s)
#define AV_CODEC_FLAG_CLOSED_GOP
Definition: avcodec.h:939
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 (H.263, MPEG-4 4MV)
Definition: mpegvideo.h:267
int b_code
backward MV resolution for B-frames (MPEG-4)
Definition: mpegvideo.h:236
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
static void mpeg4_encode_dc(PutBitContext *s, int level, int n)
Encode the dc value.
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
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:275
#define GOP_STARTCODE
Definition: mpeg4video.h:58
#define VOS_STARTCODE
Definition: mpeg4video.h:56